synclink_cs.c
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上传日期:2013-04-10
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- /*
- * linux/drivers/char/synclink_cs.c
- *
- * $Id: synclink_cs.c,v 3.4 2002/04/22 14:36:41 paulkf Exp $
- *
- * Device driver for Microgate SyncLink PC Card
- * multiprotocol serial adapter.
- *
- * written by Paul Fulghum for Microgate Corporation
- * paulkf@microgate.com
- *
- * Microgate and SyncLink are trademarks of Microgate Corporation
- *
- * This code is released under the GNU General Public License (GPL)
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
- #if defined(__i386__)
- # define BREAKPOINT() asm(" int $3");
- #else
- # define BREAKPOINT() { }
- #endif
- #define MAX_DEVICE_COUNT 4
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/errno.h>
- #include <linux/signal.h>
- #include <linux/sched.h>
- #include <linux/timer.h>
- #include <linux/interrupt.h>
- #include <linux/pci.h>
- #include <linux/tty.h>
- #include <linux/tty_flip.h>
- #include <linux/serial.h>
- #include <linux/major.h>
- #include <linux/string.h>
- #include <linux/fcntl.h>
- #include <linux/ptrace.h>
- #include <linux/ioport.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <linux/netdevice.h>
- #include <linux/vmalloc.h>
- #include <linux/init.h>
- #include <asm/serial.h>
- #include <linux/delay.h>
- #include <linux/ioctl.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/dma.h>
- #include <asm/bitops.h>
- #include <asm/types.h>
- #include <linux/termios.h>
- #include <linux/tqueue.h>
- #include <pcmcia/version.h>
- #include <pcmcia/cs_types.h>
- #include <pcmcia/cs.h>
- #include <pcmcia/cistpl.h>
- #include <pcmcia/cisreg.h>
- #include <pcmcia/ds.h>
- #include <pcmcia/bus_ops.h>
- #ifdef CONFIG_SYNCLINK_SYNCPPP_MODULE
- #define CONFIG_SYNCLINK_SYNCPPP 1
- #endif
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- #if LINUX_VERSION_CODE < VERSION(2,4,3)
- #include "../net/wan/syncppp.h"
- #else
- #include <net/syncppp.h>
- #endif
- #endif
- #include <asm/segment.h>
- #define GET_USER(error,value,addr) error = get_user(value,addr)
- #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
- #define PUT_USER(error,value,addr) error = put_user(value,addr)
- #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
- #include <asm/uaccess.h>
- #include "linux/synclink.h"
- static MGSL_PARAMS default_params = {
- MGSL_MODE_HDLC, /* unsigned long mode */
- 0, /* unsigned char loopback; */
- HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
- HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
- 0, /* unsigned long clock_speed; */
- 0xff, /* unsigned char addr_filter; */
- HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
- HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
- HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
- 9600, /* unsigned long data_rate; */
- 8, /* unsigned char data_bits; */
- 1, /* unsigned char stop_bits; */
- ASYNC_PARITY_NONE /* unsigned char parity; */
- };
- typedef struct
- {
- int count;
- unsigned char status;
- char data[1];
- } RXBUF;
- /* The queue of BH actions to be performed */
- #define BH_RECEIVE 1
- #define BH_TRANSMIT 2
- #define BH_STATUS 4
- #define IO_PIN_SHUTDOWN_LIMIT 100
- #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
- struct _input_signal_events {
- int ri_up;
- int ri_down;
- int dsr_up;
- int dsr_down;
- int dcd_up;
- int dcd_down;
- int cts_up;
- int cts_down;
- };
- /*
- * Device instance data structure
- */
-
- typedef struct _mgslpc_info {
- void *if_ptr; /* General purpose pointer (used by SPPP) */
- int magic;
- int flags;
- int count; /* count of opens */
- int line;
- unsigned short close_delay;
- unsigned short closing_wait; /* time to wait before closing */
-
- struct mgsl_icount icount;
-
- struct termios normal_termios;
- struct termios callout_termios;
-
- struct tty_struct *tty;
- int timeout;
- int x_char; /* xon/xoff character */
- int blocked_open; /* # of blocked opens */
- long session; /* Session of opening process */
- long pgrp; /* pgrp of opening process */
- unsigned char read_status_mask;
- unsigned char ignore_status_mask;
- unsigned char *tx_buf;
- int tx_put;
- int tx_get;
- int tx_count;
- /* circular list of fixed length rx buffers */
- unsigned char *rx_buf; /* memory allocated for all rx buffers */
- int rx_buf_total_size; /* size of memory allocated for rx buffers */
- int rx_put; /* index of next empty rx buffer */
- int rx_get; /* index of next full rx buffer */
- int rx_buf_size; /* size in bytes of single rx buffer */
- int rx_buf_count; /* total number of rx buffers */
- int rx_frame_count; /* number of full rx buffers */
-
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
-
- wait_queue_head_t status_event_wait_q;
- wait_queue_head_t event_wait_q;
- struct timer_list tx_timer; /* HDLC transmit timeout timer */
- struct _mgslpc_info *next_device; /* device list link */
- unsigned short imra_value;
- unsigned short imrb_value;
- unsigned char pim_value;
- spinlock_t lock;
- struct tq_struct task; /* task structure for scheduling bh */
- u32 max_frame_size;
- u32 pending_bh;
- int bh_running;
- int bh_requested;
-
- int dcd_chkcount; /* check counts to prevent */
- int cts_chkcount; /* too many IRQs if a signal */
- int dsr_chkcount; /* is floating */
- int ri_chkcount;
- int rx_enabled;
- int rx_overflow;
- int tx_enabled;
- int tx_active;
- int tx_aborting;
- u32 idle_mode;
- int if_mode; /* serial interface selection (RS-232, v.35 etc) */
- char device_name[25]; /* device instance name */
- unsigned int io_base; /* base I/O address of adapter */
- unsigned int irq_level;
-
- MGSL_PARAMS params; /* communications parameters */
- unsigned char serial_signals; /* current serial signal states */
- char irq_occurred; /* for diagnostics use */
- char testing_irq;
- unsigned int init_error; /* startup error (DIAGS) */
- char flag_buf[MAX_ASYNC_BUFFER_SIZE];
- BOOLEAN drop_rts_on_tx_done;
- struct _input_signal_events input_signal_events;
- /* PCMCIA support */
- dev_link_t link;
- dev_node_t node;
- int stop;
- struct bus_operations *bus;
- /* SPPP/Cisco HDLC device parts */
- int netcount;
- int dosyncppp;
- spinlock_t netlock;
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- struct ppp_device pppdev;
- char netname[10];
- struct net_device *netdev;
- struct net_device_stats netstats;
- struct net_device netdevice;
- #endif
- } MGSLPC_INFO;
- #define MGSLPC_MAGIC 0x5402
- /*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
- #define TXBUFSIZE 4096
-
- #define CHA 0x00 /* channel A offset */
- #define CHB 0x40 /* channel B offset */
-
- #define RXFIFO 0
- #define TXFIFO 0
- #define STAR 0x20
- #define CMDR 0x20
- #define RSTA 0x21
- #define PRE 0x21
- #define MODE 0x22
- #define TIMR 0x23
- #define XAD1 0x24
- #define XAD2 0x25
- #define RAH1 0x26
- #define RAH2 0x27
- #define DAFO 0x27
- #define RAL1 0x28
- #define RFC 0x28
- #define RHCR 0x29
- #define RAL2 0x29
- #define RBCL 0x2a
- #define XBCL 0x2a
- #define RBCH 0x2b
- #define XBCH 0x2b
- #define CCR0 0x2c
- #define CCR1 0x2d
- #define CCR2 0x2e
- #define CCR3 0x2f
- #define VSTR 0x34
- #define BGR 0x34
- #define RLCR 0x35
- #define AML 0x36
- #define AMH 0x37
- #define GIS 0x38
- #define IVA 0x38
- #define IPC 0x39
- #define ISR 0x3a
- #define IMR 0x3a
- #define PVR 0x3c
- #define PIS 0x3d
- #define PIM 0x3d
- #define PCR 0x3e
- #define CCR4 0x3f
-
- // IMR/ISR
-
- #define IRQ_BREAK_ON BIT15 // rx break detected
- #define IRQ_DATAOVERRUN BIT14 // receive data overflow
- #define IRQ_ALLSENT BIT13 // all sent
- #define IRQ_UNDERRUN BIT12 // transmit data underrun
- #define IRQ_TIMER BIT11 // timer interrupt
- #define IRQ_CTS BIT10 // CTS status change
- #define IRQ_TXREPEAT BIT9 // tx message repeat
- #define IRQ_TXFIFO BIT8 // transmit pool ready
- #define IRQ_RXEOM BIT7 // receive message end
- #define IRQ_EXITHUNT BIT6 // receive frame start
- #define IRQ_RXTIME BIT6 // rx char timeout
- #define IRQ_DCD BIT2 // carrier detect status change
- #define IRQ_OVERRUN BIT1 // receive frame overflow
- #define IRQ_RXFIFO BIT0 // receive pool full
-
- // STAR
-
- #define XFW BIT6 // transmit FIFO write enable
- #define CEC BIT2 // command executing
- #define CTS BIT1 // CTS state
-
- #define PVR_DTR BIT0
- #define PVR_DSR BIT1
- #define PVR_RI BIT2
- #define PVR_AUTOCTS BIT3
- #define PVR_RS232 0x20 /* 0010b */
- #define PVR_V35 0xe0 /* 1110b */
- #define PVR_RS422 0x40 /* 0100b */
-
- /* Register access functions */
-
- #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
- #define read_reg(info, reg) inb((info)->io_base + (reg))
- #define read_reg16(info, reg) inw((info)->io_base + (reg))
- #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
-
- #define set_reg_bits(info, reg, mask)
- write_reg(info, (reg),
- (unsigned char) (read_reg(info, (reg)) | (mask)))
- #define clear_reg_bits(info, reg, mask)
- write_reg(info, (reg),
- (unsigned char) (read_reg(info, (reg)) & ~(mask)))
- /*
- * interrupt enable/disable routines
- */
- static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
- {
- if (channel == CHA) {
- info->imra_value |= mask;
- write_reg16(info, CHA + IMR, info->imra_value);
- } else {
- info->imrb_value |= mask;
- write_reg16(info, CHB + IMR, info->imrb_value);
- }
- }
- static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
- {
- if (channel == CHA) {
- info->imra_value &= ~mask;
- write_reg16(info, CHA + IMR, info->imra_value);
- } else {
- info->imrb_value &= ~mask;
- write_reg16(info, CHB + IMR, info->imrb_value);
- }
- }
- #define port_irq_disable(info, mask)
- { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
- #define port_irq_enable(info, mask)
- { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
- static void rx_start(MGSLPC_INFO *info);
- static void rx_stop(MGSLPC_INFO *info);
- static void tx_start(MGSLPC_INFO *info);
- static void tx_stop(MGSLPC_INFO *info);
- static void tx_set_idle(MGSLPC_INFO *info);
- static void get_signals(MGSLPC_INFO *info);
- static void set_signals(MGSLPC_INFO *info);
- static void reset_device(MGSLPC_INFO *info);
- static void hdlc_mode(MGSLPC_INFO *info);
- static void async_mode(MGSLPC_INFO *info);
- static void tx_timeout(unsigned long context);
- static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg);
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- /* SPPP/HDLC stuff */
- static void mgslpc_sppp_init(MGSLPC_INFO *info);
- static void mgslpc_sppp_delete(MGSLPC_INFO *info);
- static int mgslpc_sppp_open(struct net_device *d);
- static int mgslpc_sppp_close(struct net_device *d);
- static void mgslpc_sppp_tx_timeout(struct net_device *d);
- static int mgslpc_sppp_tx(struct sk_buff *skb, struct net_device *d);
- static void mgslpc_sppp_rx_done(MGSLPC_INFO *info, char *buf, int size);
- static void mgslpc_sppp_tx_done(MGSLPC_INFO *info);
- static int mgslpc_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
- struct net_device_stats *mgslpc_net_stats(struct net_device *dev);
- #endif
- static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit);
- static BOOLEAN register_test(MGSLPC_INFO *info);
- static BOOLEAN irq_test(MGSLPC_INFO *info);
- static int adapter_test(MGSLPC_INFO *info);
- static int claim_resources(MGSLPC_INFO *info);
- static void release_resources(MGSLPC_INFO *info);
- static void mgslpc_add_device(MGSLPC_INFO *info);
- static void mgslpc_remove_device(MGSLPC_INFO *info);
- static int rx_get_frame(MGSLPC_INFO *info);
- static void rx_reset_buffers(MGSLPC_INFO *info);
- static int rx_alloc_buffers(MGSLPC_INFO *info);
- static void rx_free_buffers(MGSLPC_INFO *info);
- static void mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs);
- /*
- * Bottom half interrupt handlers
- */
- static void bh_handler(void* Context);
- static void bh_transmit(MGSLPC_INFO *info);
- static void bh_status(MGSLPC_INFO *info);
- /*
- * ioctl handlers
- */
- static int set_modem_info(MGSLPC_INFO *info, unsigned int cmd,
- unsigned int *value);
- static int get_modem_info(MGSLPC_INFO *info, unsigned int *value);
- static int get_stats(MGSLPC_INFO *info, struct mgsl_icount *user_icount);
- static int get_params(MGSLPC_INFO *info, MGSL_PARAMS *user_params);
- static int set_params(MGSLPC_INFO *info, MGSL_PARAMS *new_params);
- static int get_txidle(MGSLPC_INFO *info, int*idle_mode);
- static int set_txidle(MGSLPC_INFO *info, int idle_mode);
- static int set_txenable(MGSLPC_INFO *info, int enable);
- static int tx_abort(MGSLPC_INFO *info);
- static int set_rxenable(MGSLPC_INFO *info, int enable);
- static int wait_events(MGSLPC_INFO *info, int *mask);
- #define jiffies_from_ms(a) ((((a) * HZ)/1000)+1)
- static MGSLPC_INFO *mgslpc_device_list = NULL;
- static int mgslpc_device_count = 0;
- /*
- * Set this param to non-zero to load eax with the
- * .text section address and breakpoint on module load.
- * This is useful for use with gdb and add-symbol-file command.
- */
- static int break_on_load=0;
- /*
- * Driver major number, defaults to zero to get auto
- * assigned major number. May be forced as module parameter.
- */
- static int ttymajor=0;
- static int cuamajor=0;
- static int debug_level = 0;
- static int maxframe[MAX_DEVICE_COUNT] = {0,};
- /* The old way: bit map of interrupts to choose from */
- /* This means pick from 15, 14, 12, 11, 10, 9, 7, 5, 4, and 3 */
- static u_int irq_mask = 0xdeb8;
- /* Newer, simpler way of listing specific interrupts */
- static int irq_list[4] = { -1 };
- MODULE_PARM(irq_mask, "i");
- MODULE_PARM(irq_list, "1-4i");
- MODULE_PARM(break_on_load,"i");
- MODULE_PARM(ttymajor,"i");
- MODULE_PARM(cuamajor,"i");
- MODULE_PARM(debug_level,"i");
- MODULE_PARM(maxframe,"1-" __MODULE_STRING(MAX_DEVICE_COUNT) "i");
- static char *driver_name = "SyncLink PC Card driver";
- static char *driver_version = "$Revision: 3.4 $";
- static struct tty_driver serial_driver, callout_driver;
- static int serial_refcount;
- /* number of characters left in xmit buffer before we ask for more */
- #define WAKEUP_CHARS 256
- static void mgslpc_change_params(MGSLPC_INFO *info);
- static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
- static struct tty_struct *serial_table[MAX_DEVICE_COUNT];
- static struct termios *serial_termios[MAX_DEVICE_COUNT];
- static struct termios *serial_termios_locked[MAX_DEVICE_COUNT];
- #ifndef MIN
- #define MIN(a,b) ((a) < (b) ? (a) : (b))
- #endif
- /* PCMCIA prototypes */
- static void mgslpc_config(dev_link_t *link);
- static void mgslpc_release(u_long arg);
- static int mgslpc_event(event_t event, int priority,
- event_callback_args_t *args);
- static dev_link_t *mgslpc_attach(void);
- static void mgslpc_detach(dev_link_t *);
- static dev_info_t dev_info = "synclink_cs";
- static dev_link_t *dev_list = NULL;
- static void cs_error(client_handle_t handle, int func, int ret)
- {
- error_info_t err = { func, ret };
- CardServices(ReportError, handle, &err);
- }
- /*
- * 1st function defined in .text section. Calling this function in
- * init_module() followed by a breakpoint allows a remote debugger
- * (gdb) to get the .text address for the add-symbol-file command.
- * This allows remote debugging of dynamically loadable modules.
- */
- static void* mgslpc_get_text_ptr(void);
- static void* mgslpc_get_text_ptr() {return mgslpc_get_text_ptr;}
- static dev_link_t *mgslpc_attach(void)
- {
- MGSLPC_INFO *info;
- dev_link_t *link;
- client_reg_t client_reg;
- int ret, i;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_attachn");
-
- info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
- if (!info) {
- printk("Error can't allocate device instance datan");
- return NULL;
- }
- memset(info, 0, sizeof(MGSLPC_INFO));
- info->magic = MGSLPC_MAGIC;
- info->task.sync = 0;
- info->task.routine = bh_handler;
- info->task.data = info;
- info->max_frame_size = 4096;
- info->close_delay = 5*HZ/10;
- info->closing_wait = 30*HZ;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- init_waitqueue_head(&info->status_event_wait_q);
- init_waitqueue_head(&info->event_wait_q);
- spin_lock_init(&info->lock);
- spin_lock_init(&info->netlock);
- memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
- info->idle_mode = HDLC_TXIDLE_FLAGS;
- info->imra_value = 0xffff;
- info->imrb_value = 0xffff;
- info->pim_value = 0xff;
- link = &info->link;
- link->priv = info;
-
- /* Initialize the dev_link_t structure */
- link->release.function = &mgslpc_release;
- link->release.data = (u_long)link;
- /* Interrupt setup */
- link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
- link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
- if (irq_list[0] == -1)
- link->irq.IRQInfo2 = irq_mask;
- else
- for (i = 0; i < 4; i++)
- link->irq.IRQInfo2 |= 1 << irq_list[i];
- link->irq.Handler = NULL;
-
- link->conf.Attributes = 0;
- link->conf.Vcc = 50;
- link->conf.IntType = INT_MEMORY_AND_IO;
- /* Register with Card Services */
- link->next = dev_list;
- dev_list = link;
- client_reg.dev_info = &dev_info;
- client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
- client_reg.EventMask =
- CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
- CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
- CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
- client_reg.event_handler = &mgslpc_event;
- client_reg.Version = 0x0210;
- client_reg.event_callback_args.client_data = link;
- ret = CardServices(RegisterClient, &link->handle, &client_reg);
- if (ret != CS_SUCCESS) {
- cs_error(link->handle, RegisterClient, ret);
- mgslpc_detach(link);
- return NULL;
- }
- mgslpc_add_device(info);
- memset(serial_table,0,sizeof(struct tty_struct*)*MAX_DEVICE_COUNT);
- memset(serial_termios,0,sizeof(struct termios*)*MAX_DEVICE_COUNT);
- memset(serial_termios_locked,0,sizeof(struct termios*)*MAX_DEVICE_COUNT);
-
- info->callout_termios = callout_driver.init_termios;
- info->normal_termios = serial_driver.init_termios;
- return link;
- }
- /* Card has been inserted.
- */
- #define CS_CHECK(fn, args...)
- while ((last_ret=CardServices(last_fn=(fn),args))!=0) goto cs_failed
- static void mgslpc_config(dev_link_t *link)
- {
- client_handle_t handle = link->handle;
- MGSLPC_INFO *info = link->priv;
- tuple_t tuple;
- cisparse_t parse;
- int last_fn, last_ret;
- u_char buf[64];
- config_info_t conf;
- cistpl_cftable_entry_t dflt = { 0 };
- cistpl_cftable_entry_t *cfg;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_config(0x%p)n", link);
- /* read CONFIG tuple to find its configuration registers */
- tuple.DesiredTuple = CISTPL_CONFIG;
- tuple.Attributes = 0;
- tuple.TupleData = buf;
- tuple.TupleDataMax = sizeof(buf);
- tuple.TupleOffset = 0;
- CS_CHECK(GetFirstTuple, handle, &tuple);
- CS_CHECK(GetTupleData, handle, &tuple);
- CS_CHECK(ParseTuple, handle, &tuple, &parse);
- link->conf.ConfigBase = parse.config.base;
- link->conf.Present = parse.config.rmask[0];
-
- /* Configure card */
- link->state |= DEV_CONFIG;
- /* Look up the current Vcc */
- CS_CHECK(GetConfigurationInfo, handle, &conf);
- link->conf.Vcc = conf.Vcc;
- /* get CIS configuration entry */
- tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
- CS_CHECK(GetFirstTuple, handle, &tuple);
- cfg = &(parse.cftable_entry);
- CS_CHECK(GetTupleData, handle, &tuple);
- CS_CHECK(ParseTuple, handle, &tuple, &parse);
- if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
- if (cfg->index == 0)
- goto cs_failed;
- link->conf.ConfigIndex = cfg->index;
- link->conf.Attributes |= CONF_ENABLE_IRQ;
-
- /* IO window settings */
- link->io.NumPorts1 = 0;
- if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
- cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
- link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
- if (!(io->flags & CISTPL_IO_8BIT))
- link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
- if (!(io->flags & CISTPL_IO_16BIT))
- link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
- link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
- link->io.BasePort1 = io->win[0].base;
- link->io.NumPorts1 = io->win[0].len;
- CS_CHECK(RequestIO, link->handle, &link->io);
- }
- link->conf.Attributes = CONF_ENABLE_IRQ;
- link->conf.Vcc = 50;
- link->conf.IntType = INT_MEMORY_AND_IO;
- link->conf.ConfigIndex = 8;
- link->conf.Present = PRESENT_OPTION;
-
- link->irq.Attributes |= IRQ_HANDLE_PRESENT;
- link->irq.Handler = mgslpc_isr;
- link->irq.Instance = info;
- CS_CHECK(RequestIRQ, link->handle, &link->irq);
- CS_CHECK(RequestConfiguration, link->handle, &link->conf);
- info->io_base = link->io.BasePort1;
- info->irq_level = link->irq.AssignedIRQ;
- /* add to linked list of devices */
- sprintf(info->node.dev_name, "mgslpc0");
- info->node.major = info->node.minor = 0;
- link->dev = &info->node;
- printk(KERN_INFO "%s: index 0x%02x:",
- info->node.dev_name, link->conf.ConfigIndex);
- if (link->conf.Attributes & CONF_ENABLE_IRQ)
- printk(", irq %d", link->irq.AssignedIRQ);
- if (link->io.NumPorts1)
- printk(", io 0x%04x-0x%04x", link->io.BasePort1,
- link->io.BasePort1+link->io.NumPorts1-1);
- printk("n");
-
- link->state &= ~DEV_CONFIG_PENDING;
- return;
- cs_failed:
- cs_error(link->handle, last_fn, last_ret);
- mgslpc_release((u_long)link);
- }
- /* Card has been removed.
- * Unregister device and release PCMCIA configuration.
- * If device is open, postpone until it is closed.
- */
- static void mgslpc_release(u_long arg)
- {
- dev_link_t *link = (dev_link_t *)arg;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_release(0x%p)n", link);
- if (link->open) {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("synclink_cs: release postponed, '%s' still openn",
- link->dev->dev_name);
- link->state |= DEV_STALE_CONFIG;
- return;
- }
- /* Unlink the device chain */
- link->dev = NULL;
- link->state &= ~DEV_CONFIG;
- CardServices(ReleaseConfiguration, link->handle);
- if (link->io.NumPorts1)
- CardServices(ReleaseIO, link->handle, &link->io);
- if (link->irq.AssignedIRQ)
- CardServices(ReleaseIRQ, link->handle, &link->irq);
- if (link->state & DEV_STALE_LINK)
- mgslpc_detach(link);
- }
- static void mgslpc_detach(dev_link_t *link)
- {
- dev_link_t **linkp;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_detach(0x%p)n", link);
-
- /* find device */
- for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
- if (*linkp == link) break;
- if (*linkp == NULL)
- return;
- if (link->state & DEV_CONFIG) {
- /* device is configured/active, mark it so when
- * release() is called a proper detach() occurs.
- */
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk(KERN_DEBUG "synclinkpc: detach postponed, '%s' "
- "still lockedn", link->dev->dev_name);
- link->state |= DEV_STALE_LINK;
- return;
- }
- /* Break the link with Card Services */
- if (link->handle)
- CardServices(DeregisterClient, link->handle);
-
- /* Unlink device structure, and free it */
- *linkp = link->next;
- mgslpc_remove_device((MGSLPC_INFO *)link->priv);
- }
- static int mgslpc_event(event_t event, int priority,
- event_callback_args_t *args)
- {
- dev_link_t *link = args->client_data;
- MGSLPC_INFO *info = link->priv;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_event(0x%06x)n", event);
-
- switch (event) {
- case CS_EVENT_CARD_REMOVAL:
- link->state &= ~DEV_PRESENT;
- if (link->state & DEV_CONFIG) {
- ((MGSLPC_INFO *)link->priv)->stop = 1;
- mod_timer(&link->release, jiffies + HZ/20);
- }
- break;
- case CS_EVENT_CARD_INSERTION:
- link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
- info->bus = args->bus;
- mgslpc_config(link);
- break;
- case CS_EVENT_PM_SUSPEND:
- link->state |= DEV_SUSPEND;
- /* Fall through... */
- case CS_EVENT_RESET_PHYSICAL:
- /* Mark the device as stopped, to block IO until later */
- info->stop = 1;
- if (link->state & DEV_CONFIG)
- CardServices(ReleaseConfiguration, link->handle);
- break;
- case CS_EVENT_PM_RESUME:
- link->state &= ~DEV_SUSPEND;
- /* Fall through... */
- case CS_EVENT_CARD_RESET:
- if (link->state & DEV_CONFIG)
- CardServices(RequestConfiguration, link->handle, &link->conf);
- info->stop = 0;
- break;
- }
- return 0;
- }
- static inline int mgslpc_paranoia_check(MGSLPC_INFO *info,
- kdev_t device, const char *routine)
- {
- #ifdef MGSLPC_PARANOIA_CHECK
- static const char *badmagic =
- "Warning: bad magic number for mgsl struct (%s) in %sn";
- static const char *badinfo =
- "Warning: null mgslpc_info for (%s) in %sn";
- if (!info) {
- printk(badinfo, kdevname(device), routine);
- return 1;
- }
- if (info->magic != MGSLPC_MAGIC) {
- printk(badmagic, kdevname(device), routine);
- return 1;
- }
- #endif
- return 0;
- }
- #define CMD_RXFIFO BIT7 // release current rx FIFO
- #define CMD_RXRESET BIT6 // receiver reset
- #define CMD_RXFIFO_READ BIT5
- #define CMD_START_TIMER BIT4
- #define CMD_TXFIFO BIT3 // release current tx FIFO
- #define CMD_TXEOM BIT1 // transmit end message
- #define CMD_TXRESET BIT0 // transmit reset
- static BOOLEAN wait_command_complete(MGSLPC_INFO *info, unsigned char channel)
- {
- int i = 0;
- unsigned char status;
- /* wait for command completion */
- while ((status = read_reg(info, (unsigned char)(channel+STAR)) & BIT2)) {
- udelay(1);
- if (i++ == 1000)
- return FALSE;
- }
- return TRUE;
- }
- static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd)
- {
- wait_command_complete(info, channel);
- write_reg(info, (unsigned char) (channel + CMDR), cmd);
- }
- static void tx_pause(struct tty_struct *tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (mgslpc_paranoia_check(info, tty->device, "tx_pause"))
- return;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("tx_pause(%s)n",info->device_name);
-
- spin_lock_irqsave(&info->lock,flags);
- if (info->tx_enabled)
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- static void tx_release(struct tty_struct *tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (mgslpc_paranoia_check(info, tty->device, "tx_release"))
- return;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("tx_release(%s)n",info->device_name);
-
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_enabled)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- /* Return next bottom half action to perform.
- * or 0 if nothing to do.
- */
- int bh_action(MGSLPC_INFO *info)
- {
- unsigned long flags;
- int rc = 0;
-
- spin_lock_irqsave(&info->lock,flags);
- if (info->pending_bh & BH_RECEIVE) {
- info->pending_bh &= ~BH_RECEIVE;
- rc = BH_RECEIVE;
- } else if (info->pending_bh & BH_TRANSMIT) {
- info->pending_bh &= ~BH_TRANSMIT;
- rc = BH_TRANSMIT;
- } else if (info->pending_bh & BH_STATUS) {
- info->pending_bh &= ~BH_STATUS;
- rc = BH_STATUS;
- }
- if (!rc) {
- /* Mark BH routine as complete */
- info->bh_running = 0;
- info->bh_requested = 0;
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- return rc;
- }
- void bh_handler(void* Context)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO*)Context;
- int action;
- if (!info)
- return;
-
- if (debug_level >= DEBUG_LEVEL_BH)
- printk( "%s(%d):bh_handler(%s) entryn",
- __FILE__,__LINE__,info->device_name);
-
- info->bh_running = 1;
- while((action = bh_action(info)) != 0) {
-
- /* Process work item */
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):bh_handler() work item action=%dn",
- __FILE__,__LINE__,action);
- switch (action) {
-
- case BH_RECEIVE:
- while(rx_get_frame(info));
- break;
- case BH_TRANSMIT:
- bh_transmit(info);
- break;
- case BH_STATUS:
- bh_status(info);
- break;
- default:
- /* unknown work item ID */
- printk("Unknown work item ID=%08X!n", action);
- break;
- }
- }
- if (debug_level >= DEBUG_LEVEL_BH)
- printk( "%s(%d):bh_handler(%s) exitn",
- __FILE__,__LINE__,info->device_name);
- }
- void bh_transmit(MGSLPC_INFO *info)
- {
- struct tty_struct *tty = info->tty;
- if (debug_level >= DEBUG_LEVEL_BH)
- printk("bh_transmit() entry on %sn", info->device_name);
- if (tty) {
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup) {
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):calling ldisc.write_wakeup on %sn",
- __FILE__,__LINE__,info->device_name);
- (tty->ldisc.write_wakeup)(tty);
- }
- wake_up_interruptible(&tty->write_wait);
- }
- }
- void bh_status(MGSLPC_INFO *info)
- {
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
- }
- /* eom: non-zero = end of frame */
- void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
- {
- unsigned char data[2];
- unsigned char fifo_count, read_count, i;
- RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):rx_ready_hdlc(eom=%d)n",__FILE__,__LINE__,eom);
-
- if (!info->rx_enabled)
- return;
- if (info->rx_frame_count >= info->rx_buf_count) {
- /* no more free buffers */
- issue_command(info, CHA, CMD_RXRESET);
- info->pending_bh |= BH_RECEIVE;
- info->rx_overflow = 1;
- info->icount.buf_overrun++;
- return;
- }
- if (eom) {
- /* end of frame, get FIFO count from RBCL register */
- if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f)))
- fifo_count = 32;
- } else
- fifo_count = 32;
-
- do {
- if (fifo_count == 1) {
- read_count = 1;
- data[0] = read_reg(info, CHA + RXFIFO);
- } else {
- read_count = 2;
- *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO);
- }
- fifo_count -= read_count;
- if (!fifo_count && eom)
- buf->status = data[--read_count];
- for (i = 0; i < read_count; i++) {
- if (buf->count >= info->max_frame_size) {
- /* frame too large, reset receiver and reset current buffer */
- issue_command(info, CHA, CMD_RXRESET);
- buf->count = 0;
- return;
- }
- *(buf->data + buf->count) = data[i];
- buf->count++;
- }
- } while (fifo_count);
- if (eom) {
- info->pending_bh |= BH_RECEIVE;
- info->rx_frame_count++;
- info->rx_put++;
- if (info->rx_put >= info->rx_buf_count)
- info->rx_put = 0;
- }
- issue_command(info, CHA, CMD_RXFIFO);
- }
- void rx_ready_async(MGSLPC_INFO *info, int tcd)
- {
- unsigned char data, status;
- int fifo_count;
- struct tty_struct *tty = info->tty;
- struct mgsl_icount *icount = &info->icount;
- if (tcd) {
- /* early termination, get FIFO count from RBCL register */
- fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
- /* Zero fifo count could mean 0 or 32 bytes available.
- * If BIT5 of STAR is set then at least 1 byte is available.
- */
- if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5))
- fifo_count = 32;
- } else
- fifo_count = 32;
-
- /* Flush received async data to receive data buffer. */
- while (fifo_count) {
- data = read_reg(info, CHA + RXFIFO);
- status = read_reg(info, CHA + RXFIFO);
- fifo_count -= 2;
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- break;
-
- *tty->flip.char_buf_ptr = data;
- icount->rx++;
-
- *tty->flip.flag_buf_ptr = 0;
- // if no frameing/crc error then save data
- // BIT7:parity error
- // BIT6:framing error
- if (status & (BIT7 + BIT6)) {
- if (status & BIT7)
- icount->parity++;
- else
- icount->frame++;
- /* discard char if tty control flags say so */
- if (status & info->ignore_status_mask)
- continue;
-
- status &= info->read_status_mask;
- if (status & BIT7)
- *tty->flip.flag_buf_ptr = TTY_PARITY;
- else if (status & BIT6)
- *tty->flip.flag_buf_ptr = TTY_FRAME;
- }
-
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
- }
- issue_command(info, CHA, CMD_RXFIFO);
- if (debug_level >= DEBUG_LEVEL_ISR) {
- printk("%s(%d):rx_ready_async count=%dn",
- __FILE__,__LINE__,tty->flip.count);
- printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%dn",
- __FILE__,__LINE__,icount->rx,icount->brk,
- icount->parity,icount->frame,icount->overrun);
- }
-
- if (tty->flip.count)
- tty_flip_buffer_push(tty);
- }
- void tx_done(MGSLPC_INFO *info)
- {
- if (!info->tx_active)
- return;
-
- info->tx_active = 0;
- info->tx_aborting = 0;
- if (info->params.mode == MGSL_MODE_ASYNC)
- return;
- info->tx_count = info->tx_put = info->tx_get = 0;
- del_timer(&info->tx_timer);
-
- if (info->drop_rts_on_tx_done) {
- get_signals(info);
- if (info->serial_signals & SerialSignal_RTS) {
- info->serial_signals &= ~SerialSignal_RTS;
- set_signals(info);
- }
- info->drop_rts_on_tx_done = 0;
- }
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- if (info->netcount)
- mgslpc_sppp_tx_done(info);
- else
- #endif
- {
- if (info->tty->stopped || info->tty->hw_stopped) {
- tx_stop(info);
- return;
- }
- info->pending_bh |= BH_TRANSMIT;
- }
- }
- void tx_ready(MGSLPC_INFO *info)
- {
- unsigned char fifo_count = 32;
- int c;
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):tx_ready(%s)n", __FILE__,__LINE__,info->device_name);
- if (info->params.mode == MGSL_MODE_HDLC) {
- if (!info->tx_active)
- return;
- } else {
- if (info->tty->stopped || info->tty->hw_stopped) {
- tx_stop(info);
- return;
- }
- if (!info->tx_count)
- info->tx_active = 0;
- }
- if (!info->tx_count)
- return;
- while (info->tx_count && fifo_count) {
- c = MIN(2, MIN(fifo_count, MIN(info->tx_count, TXBUFSIZE - info->tx_get)));
-
- if (c == 1) {
- write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get));
- } else {
- write_reg16(info, CHA + TXFIFO,
- *((unsigned short*)(info->tx_buf + info->tx_get)));
- }
- info->tx_count -= c;
- info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1);
- fifo_count -= c;
- }
- if (info->params.mode == MGSL_MODE_ASYNC) {
- if (info->tx_count < WAKEUP_CHARS)
- info->pending_bh |= BH_TRANSMIT;
- issue_command(info, CHA, CMD_TXFIFO);
- } else {
- if (info->tx_count)
- issue_command(info, CHA, CMD_TXFIFO);
- else
- issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM);
- }
- }
- void cts_change(MGSLPC_INFO *info)
- {
- get_signals(info);
- if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- irq_disable(info, CHB, IRQ_CTS);
- info->icount.cts++;
- if (info->serial_signals & SerialSignal_CTS)
- info->input_signal_events.cts_up++;
- else
- info->input_signal_events.cts_down++;
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- if (info->flags & ASYNC_CTS_FLOW) {
- if (info->tty->hw_stopped) {
- if (info->serial_signals & SerialSignal_CTS) {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("CTS tx start...");
- if (info->tty)
- info->tty->hw_stopped = 0;
- tx_start(info);
- info->pending_bh |= BH_TRANSMIT;
- return;
- }
- } else {
- if (!(info->serial_signals & SerialSignal_CTS)) {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("CTS tx stop...");
- if (info->tty)
- info->tty->hw_stopped = 1;
- tx_stop(info);
- }
- }
- }
- info->pending_bh |= BH_STATUS;
- }
- void dcd_change(MGSLPC_INFO *info)
- {
- get_signals(info);
- if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- irq_disable(info, CHB, IRQ_DCD);
- info->icount.dcd++;
- if (info->serial_signals & SerialSignal_DCD) {
- info->input_signal_events.dcd_up++;
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- if (info->netcount)
- sppp_reopen(info->netdev);
- #endif
- }
- else
- info->input_signal_events.dcd_down++;
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- if (info->flags & ASYNC_CHECK_CD) {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s CD now %s...", info->device_name,
- (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
- if (info->serial_signals & SerialSignal_DCD)
- wake_up_interruptible(&info->open_wait);
- else if (!(info->flags & (ASYNC_CALLOUT_ACTIVE | ASYNC_CALLOUT_NOHUP))) {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("doing serial hangup...");
- if (info->tty)
- tty_hangup(info->tty);
- }
- }
- info->pending_bh |= BH_STATUS;
- }
- void dsr_change(MGSLPC_INFO *info)
- {
- get_signals(info);
- if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- port_irq_disable(info, PVR_DSR);
- info->icount.dsr++;
- if (info->serial_signals & SerialSignal_DSR)
- info->input_signal_events.dsr_up++;
- else
- info->input_signal_events.dsr_down++;
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- info->pending_bh |= BH_STATUS;
- }
- void ri_change(MGSLPC_INFO *info)
- {
- get_signals(info);
- if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- port_irq_disable(info, PVR_RI);
- info->icount.rng++;
- if (info->serial_signals & SerialSignal_RI)
- info->input_signal_events.ri_up++;
- else
- info->input_signal_events.ri_down++;
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- info->pending_bh |= BH_STATUS;
- }
- /* Interrupt service routine entry point.
- *
- * Arguments:
- *
- * irq interrupt number that caused interrupt
- * dev_id device ID supplied during interrupt registration
- * regs interrupted processor context
- */
- static void mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs)
- {
- MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id;
- unsigned short isr;
- unsigned char gis, pis;
- int count=0;
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("mgslpc_isr(%d) entry.n", irq);
- if (!info)
- return;
-
- if (!(info->link.state & DEV_CONFIG))
- return;
- spin_lock(&info->lock);
- while ((gis = read_reg(info, CHA + GIS))) {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("mgslpc_isr %s gis=%04Xn", info->device_name,gis);
- if ((gis & 0x70) || count > 1000) {
- printk("synclink_cs:hardware failed or ejectedn");
- break;
- }
- count++;
- if (gis & (BIT1 + BIT0)) {
- isr = read_reg16(info, CHB + ISR);
- if (isr & IRQ_DCD)
- dcd_change(info);
- if (isr & IRQ_CTS)
- cts_change(info);
- }
- if (gis & (BIT3 + BIT2))
- {
- isr = read_reg16(info, CHA + ISR);
- if (isr & IRQ_TIMER) {
- info->irq_occurred = 1;
- irq_disable(info, CHA, IRQ_TIMER);
- }
- /* receive IRQs */
- if (isr & IRQ_EXITHUNT) {
- info->icount.exithunt++;
- wake_up_interruptible(&info->event_wait_q);
- }
- if (isr & IRQ_BREAK_ON) {
- info->icount.brk++;
- if (info->flags & ASYNC_SAK)
- do_SAK(info->tty);
- }
- if (isr & IRQ_RXTIME) {
- issue_command(info, CHA, CMD_RXFIFO_READ);
- }
- if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) {
- if (info->params.mode == MGSL_MODE_HDLC)
- rx_ready_hdlc(info, isr & IRQ_RXEOM);
- else
- rx_ready_async(info, isr & IRQ_RXEOM);
- }
- /* transmit IRQs */
- if (isr & IRQ_UNDERRUN) {
- if (info->tx_aborting)
- info->icount.txabort++;
- else
- info->icount.txunder++;
- tx_done(info);
- }
- else if (isr & IRQ_ALLSENT) {
- info->icount.txok++;
- tx_done(info);
- }
- else if (isr & IRQ_TXFIFO)
- tx_ready(info);
- }
- if (gis & BIT7) {
- pis = read_reg(info, CHA + PIS);
- if (pis & BIT1)
- dsr_change(info);
- if (pis & BIT2)
- ri_change(info);
- }
- }
-
- /* Request bottom half processing if there's something
- * for it to do and the bh is not already running
- */
- if (info->pending_bh && !info->bh_running && !info->bh_requested) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s queueing bh task.n",
- __FILE__,__LINE__,info->device_name);
- queue_task(&info->task, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
- info->bh_requested = 1;
- }
- spin_unlock(&info->lock);
-
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):mgslpc_isr(%d)exit.n",
- __FILE__,__LINE__,irq);
- }
- /* Initialize and start device.
- */
- static int startup(MGSLPC_INFO * info)
- {
- int retval = 0;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):startup(%s)n",__FILE__,__LINE__,info->device_name);
-
- if (info->flags & ASYNC_INITIALIZED)
- return 0;
-
- if (!info->tx_buf) {
- /* allocate a page of memory for a transmit buffer */
- info->tx_buf = (unsigned char *)get_free_page(GFP_KERNEL);
- if (!info->tx_buf) {
- printk(KERN_ERR"%s(%d):%s can't allocate transmit buffern",
- __FILE__,__LINE__,info->device_name);
- return -ENOMEM;
- }
- }
- info->pending_bh = 0;
-
- init_timer(&info->tx_timer);
- info->tx_timer.data = (unsigned long)info;
- info->tx_timer.function = tx_timeout;
- /* Allocate and claim adapter resources */
- retval = claim_resources(info);
-
- /* perform existance check and diagnostics */
- if ( !retval )
- retval = adapter_test(info);
-
- if ( retval ) {
- if (capable(CAP_SYS_ADMIN) && info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
- release_resources(info);
- return retval;
- }
- /* program hardware for current parameters */
- mgslpc_change_params(info);
-
- if (info->tty)
- clear_bit(TTY_IO_ERROR, &info->tty->flags);
- info->flags |= ASYNC_INITIALIZED;
-
- return 0;
- }
- /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
- */
- static void shutdown(MGSLPC_INFO * info)
- {
- unsigned long flags;
-
- if (!(info->flags & ASYNC_INITIALIZED))
- return;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_shutdown(%s)n",
- __FILE__,__LINE__, info->device_name );
- /* clear status wait queue because status changes */
- /* can't happen after shutting down the hardware */
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- del_timer(&info->tx_timer);
- if (info->tx_buf) {
- free_page((unsigned long) info->tx_buf);
- info->tx_buf = 0;
- }
- spin_lock_irqsave(&info->lock,flags);
- rx_stop(info);
- tx_stop(info);
- /* TODO:disable interrupts instead of reset to preserve signal states */
- reset_device(info);
-
- if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
- info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
- set_signals(info);
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
- release_resources(info);
-
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
- info->flags &= ~ASYNC_INITIALIZED;
- }
- static void mgslpc_program_hw(MGSLPC_INFO *info)
- {
- unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
-
- rx_stop(info);
- tx_stop(info);
- info->tx_count = info->tx_put = info->tx_get = 0;
-
- if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
- hdlc_mode(info);
- else
- async_mode(info);
-
- set_signals(info);
-
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
- irq_enable(info, CHB, IRQ_DCD | IRQ_CTS);
- port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
- get_signals(info);
-
- if (info->netcount || info->tty->termios->c_cflag & CREAD)
- rx_start(info);
-
- spin_unlock_irqrestore(&info->lock,flags);
- }
- /* Reconfigure adapter based on new parameters
- */
- static void mgslpc_change_params(MGSLPC_INFO *info)
- {
- unsigned cflag;
- int bits_per_char;
- if (!info->tty || !info->tty->termios)
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_change_params(%s)n",
- __FILE__,__LINE__, info->device_name );
-
- cflag = info->tty->termios->c_cflag;
- /* if B0 rate (hangup) specified then negate DTR and RTS */
- /* otherwise assert DTR and RTS */
- if (cflag & CBAUD)
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- else
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
-
- /* byte size and parity */
-
- switch (cflag & CSIZE) {
- case CS5: info->params.data_bits = 5; break;
- case CS6: info->params.data_bits = 6; break;
- case CS7: info->params.data_bits = 7; break;
- case CS8: info->params.data_bits = 8; break;
- default: info->params.data_bits = 7; break;
- }
-
- if (cflag & CSTOPB)
- info->params.stop_bits = 2;
- else
- info->params.stop_bits = 1;
- info->params.parity = ASYNC_PARITY_NONE;
- if (cflag & PARENB) {
- if (cflag & PARODD)
- info->params.parity = ASYNC_PARITY_ODD;
- else
- info->params.parity = ASYNC_PARITY_EVEN;
- #ifdef CMSPAR
- if (cflag & CMSPAR)
- info->params.parity = ASYNC_PARITY_SPACE;
- #endif
- }
- /* calculate number of jiffies to transmit a full
- * FIFO (32 bytes) at specified data rate
- */
- bits_per_char = info->params.data_bits +
- info->params.stop_bits + 1;
- /* if port data rate is set to 460800 or less then
- * allow tty settings to override, otherwise keep the
- * current data rate.
- */
- if (info->params.data_rate <= 460800) {
- info->params.data_rate = tty_get_baud_rate(info->tty);
- }
-
- if ( info->params.data_rate ) {
- info->timeout = (32*HZ*bits_per_char) /
- info->params.data_rate;
- }
- info->timeout += HZ/50; /* Add .02 seconds of slop */
- if (cflag & CRTSCTS)
- info->flags |= ASYNC_CTS_FLOW;
- else
- info->flags &= ~ASYNC_CTS_FLOW;
-
- if (cflag & CLOCAL)
- info->flags &= ~ASYNC_CHECK_CD;
- else
- info->flags |= ASYNC_CHECK_CD;
- /* process tty input control flags */
-
- info->read_status_mask = 0;
- if (I_INPCK(info->tty))
- info->read_status_mask |= BIT7 | BIT6;
- if (I_IGNPAR(info->tty))
- info->ignore_status_mask |= BIT7 | BIT6;
- mgslpc_program_hw(info);
- }
- /* Add a character to the transmit buffer
- */
- static void mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
- if (debug_level >= DEBUG_LEVEL_INFO) {
- printk( "%s(%d):mgslpc_put_char(%d) on %sn",
- __FILE__,__LINE__,ch,info->device_name);
- }
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_put_char"))
- return;
- if (!tty || !info->tx_buf)
- return;
- spin_lock_irqsave(&info->lock,flags);
-
- if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
- if (info->tx_count < TXBUFSIZE - 1) {
- info->tx_buf[info->tx_put++] = ch;
- info->tx_put &= TXBUFSIZE-1;
- info->tx_count++;
- }
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
- }
- /* Enable transmitter so remaining characters in the
- * transmit buffer are sent.
- */
- static void mgslpc_flush_chars(struct tty_struct *tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%dn",
- __FILE__,__LINE__,info->device_name,info->tx_count);
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_flush_chars"))
- return;
- if (info->tx_count <= 0 || tty->stopped ||
- tty->hw_stopped || !info->tx_buf)
- return;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmittern",
- __FILE__,__LINE__,info->device_name);
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- /* Send a block of data
- *
- * Arguments:
- *
- * tty pointer to tty information structure
- * from_user flag: 1 = from user process
- * buf pointer to buffer containing send data
- * count size of send data in bytes
- *
- * Returns: number of characters written
- */
- static int mgslpc_write(struct tty_struct * tty, int from_user,
- const unsigned char *buf, int count)
- {
- int c, ret = 0, err;
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_write(%s) count=%dn",
- __FILE__,__LINE__,info->device_name,count);
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_write") ||
- !tty || !info->tx_buf)
- goto cleanup;
- if (info->params.mode == MGSL_MODE_HDLC) {
- if (count > TXBUFSIZE) {
- ret = -EIO;
- goto cleanup;
- }
- if (info->tx_active)
- goto cleanup;
- else if (info->tx_count)
- goto start;
- }
- for (;;) {
- c = MIN(count,
- MIN(TXBUFSIZE - info->tx_count - 1,
- TXBUFSIZE - info->tx_put));
- if (c <= 0)
- break;
-
- if (from_user) {
- COPY_FROM_USER(err, info->tx_buf + info->tx_put, buf, c);
- if (err) {
- if (!ret)
- ret = -EFAULT;
- break;
- }
- } else
- memcpy(info->tx_buf + info->tx_put, buf, c);
- spin_lock_irqsave(&info->lock,flags);
- info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
- info->tx_count += c;
- spin_unlock_irqrestore(&info->lock,flags);
- buf += c;
- count -= c;
- ret += c;
- }
- start:
- if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- cleanup:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_write(%s) returning=%dn",
- __FILE__,__LINE__,info->device_name,ret);
- return ret;
- }
- /* Return the count of free bytes in transmit buffer
- */
- static int mgslpc_write_room(struct tty_struct *tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- int ret;
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_write_room"))
- return 0;
- if (info->params.mode == MGSL_MODE_HDLC) {
- /* HDLC (frame oriented) mode */
- if (info->tx_active)
- return 0;
- else
- return HDLC_MAX_FRAME_SIZE;
- } else {
- ret = TXBUFSIZE - info->tx_count - 1;
- if (ret < 0)
- ret = 0;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_write_room(%s)=%dn",
- __FILE__,__LINE__, info->device_name, ret);
- return ret;
- }
- /* Return the count of bytes in transmit buffer
- */
- static int mgslpc_chars_in_buffer(struct tty_struct *tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- int rc;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_chars_in_buffer(%s)n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_chars_in_buffer"))
- return 0;
-
- if (info->params.mode == MGSL_MODE_HDLC)
- rc = info->tx_active ? info->max_frame_size : 0;
- else
- rc = info->tx_count;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_chars_in_buffer(%s)=%dn",
- __FILE__,__LINE__, info->device_name, rc);
-
- return rc;
- }
- /* Discard all data in the send buffer
- */
- static void mgslpc_flush_buffer(struct tty_struct *tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_flush_buffer(%s) entryn",
- __FILE__,__LINE__, info->device_name );
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_flush_buffer"))
- return;
-
- spin_lock_irqsave(&info->lock,flags);
- info->tx_count = info->tx_put = info->tx_get = 0;
- del_timer(&info->tx_timer);
- spin_unlock_irqrestore(&info->lock,flags);
-
- wake_up_interruptible(&tty->write_wait);
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
- }
- /* Send a high-priority XON/XOFF character
- */
- static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_send_xchar(%s,%d)n",
- __FILE__,__LINE__, info->device_name, ch );
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_send_xchar"))
- return;
- info->x_char = ch;
- if (ch) {
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_enabled)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- }
- /* Signal remote device to throttle send data (our receive data)
- */
- static void mgslpc_throttle(struct tty_struct * tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_throttle(%s) entryn",
- __FILE__,__LINE__, info->device_name );
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_throttle"))
- return;
-
- if (I_IXOFF(tty))
- mgslpc_send_xchar(tty, STOP_CHAR(tty));
-
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
- info->serial_signals &= ~SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- }
- /* Signal remote device to stop throttling send data (our receive data)
- */
- static void mgslpc_unthrottle(struct tty_struct * tty)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_unthrottle(%s) entryn",
- __FILE__,__LINE__, info->device_name );
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- mgslpc_send_xchar(tty, START_CHAR(tty));
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
- info->serial_signals |= SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- }
- /* get the current serial statistics
- */
- static int get_stats(MGSLPC_INFO * info, struct mgsl_icount *user_icount)
- {
- int err;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("get_params(%s)n", info->device_name);
- COPY_TO_USER(err,user_icount, &info->icount, sizeof(struct mgsl_icount));
- if (err)
- return -EFAULT;
- return 0;
- }
- /* get the current serial parameters
- */
- static int get_params(MGSLPC_INFO * info, MGSL_PARAMS *user_params)
- {
- int err;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("get_params(%s)n", info->device_name);
- COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
- if (err)
- return -EFAULT;
- return 0;
- }
- /* set the serial parameters
- *
- * Arguments:
- *
- * info pointer to device instance data
- * new_params user buffer containing new serial params
- *
- * Returns: 0 if success, otherwise error code
- */
- static int set_params(MGSLPC_INFO * info, MGSL_PARAMS *new_params)
- {
- unsigned long flags;
- MGSL_PARAMS tmp_params;
- int err;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):set_params %sn", __FILE__,__LINE__,
- info->device_name );
- COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):set_params(%s) user buffer copy failedn",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
- }
-
- spin_lock_irqsave(&info->lock,flags);
- memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
- spin_unlock_irqrestore(&info->lock,flags);
-
- mgslpc_change_params(info);
-
- return 0;
- }
- static int get_txidle(MGSLPC_INFO * info, int*idle_mode)
- {
- int err;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("get_txidle(%s)=%dn", info->device_name, info->idle_mode);
- COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
- if (err)
- return -EFAULT;
- return 0;
- }
- static int set_txidle(MGSLPC_INFO * info, int idle_mode)
- {
- unsigned long flags;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("set_txidle(%s,%d)n", info->device_name, idle_mode);
- spin_lock_irqsave(&info->lock,flags);
- info->idle_mode = idle_mode;
- tx_set_idle(info);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
- }
- static int get_interface(MGSLPC_INFO * info, int*if_mode)
- {
- int err;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("get_interface(%s)=%dn", info->device_name, info->if_mode);
- COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int));
- if (err)
- return -EFAULT;
- return 0;
- }
- static int set_interface(MGSLPC_INFO * info, int if_mode)
- {
- unsigned long flags;
- unsigned char val;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("set_interface(%s,%d)n", info->device_name, if_mode);
- spin_lock_irqsave(&info->lock,flags);
- info->if_mode = if_mode;
- val = read_reg(info, PVR) & 0x0f;
- switch (info->if_mode)
- {
- case MGSL_INTERFACE_RS232: val |= PVR_RS232; break;
- case MGSL_INTERFACE_V35: val |= PVR_V35; break;
- case MGSL_INTERFACE_RS422: val |= PVR_RS422; break;
- }
- write_reg(info, PVR, val);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
- }
- static int set_txenable(MGSLPC_INFO * info, int enable)
- {
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("set_txenable(%s,%d)n", info->device_name, enable);
-
- spin_lock_irqsave(&info->lock,flags);
- if (enable) {
- if (!info->tx_enabled)
- tx_start(info);
- } else {
- if (info->tx_enabled)
- tx_stop(info);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
- }
- static int tx_abort(MGSLPC_INFO * info)
- {
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("tx_abort(%s)n", info->device_name);
-
- spin_lock_irqsave(&info->lock,flags);
- if (info->tx_active && info->tx_count &&
- info->params.mode == MGSL_MODE_HDLC) {
- /* clear data count so FIFO is not filled on next IRQ.
- * This results in underrun and abort transmission.
- */
- info->tx_count = info->tx_put = info->tx_get = 0;
- info->tx_aborting = TRUE;
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
- }
- static int set_rxenable(MGSLPC_INFO * info, int enable)
- {
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("set_rxenable(%s,%d)n", info->device_name, enable);
-
- spin_lock_irqsave(&info->lock,flags);
- if (enable) {
- if (!info->rx_enabled)
- rx_start(info);
- } else {
- if (info->rx_enabled)
- rx_stop(info);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
- }
- /* wait for specified event to occur
- *
- * Arguments: info pointer to device instance data
- * mask pointer to bitmask of events to wait for
- * Return Value: 0 if successful and bit mask updated with
- * of events triggerred,
- * otherwise error code
- */
- static int wait_events(MGSLPC_INFO * info, int * mask_ptr)
- {
- unsigned long flags;
- int s;
- int rc=0;
- struct mgsl_icount cprev, cnow;
- int events;
- int mask;
- struct _input_signal_events oldsigs, newsigs;
- DECLARE_WAITQUEUE(wait, current);
- COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
- if (rc)
- return -EFAULT;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("wait_events(%s,%d)n", info->device_name, mask);
- spin_lock_irqsave(&info->lock,flags);
- /* return immediately if state matches requested events */
- get_signals(info);
- s = info->serial_signals;
- events = mask &
- ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
- ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
- ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
- ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
- if (events) {
- spin_unlock_irqrestore(&info->lock,flags);
- goto exit;
- }
- /* save current irq counts */
- cprev = info->icount;
- oldsigs = info->input_signal_events;
-
- if ((info->params.mode == MGSL_MODE_HDLC) &&
- (mask & MgslEvent_ExitHuntMode))
- irq_enable(info, CHA, IRQ_EXITHUNT);
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&info->event_wait_q, &wait);
-
- spin_unlock_irqrestore(&info->lock,flags);
-
-
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
-
- /* get current irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- newsigs = info->input_signal_events;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
- /* if no change, wait aborted for some reason */
- if (newsigs.dsr_up == oldsigs.dsr_up &&
- newsigs.dsr_down == oldsigs.dsr_down &&
- newsigs.dcd_up == oldsigs.dcd_up &&
- newsigs.dcd_down == oldsigs.dcd_down &&
- newsigs.cts_up == oldsigs.cts_up &&
- newsigs.cts_down == oldsigs.cts_down &&
- newsigs.ri_up == oldsigs.ri_up &&
- newsigs.ri_down == oldsigs.ri_down &&
- cnow.exithunt == cprev.exithunt &&
- cnow.rxidle == cprev.rxidle) {
- rc = -EIO;
- break;
- }
- events = mask &
- ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
- (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
- (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
- (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
- (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
- (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
- (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
- (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
- (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
- (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
- if (events)
- break;
-
- cprev = cnow;
- oldsigs = newsigs;
- }
-
- remove_wait_queue(&info->event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
- if (mask & MgslEvent_ExitHuntMode) {
- spin_lock_irqsave(&info->lock,flags);
- if (!waitqueue_active(&info->event_wait_q))
- irq_disable(info, CHA, IRQ_EXITHUNT);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- exit:
- if (rc == 0)
- PUT_USER(rc, events, mask_ptr);
- return rc;
- }
- static int modem_input_wait(MGSLPC_INFO *info,int arg)
- {
- unsigned long flags;
- int rc;
- struct mgsl_icount cprev, cnow;
- DECLARE_WAITQUEUE(wait, current);
- /* save current irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cprev = info->icount;
- add_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
- /* get new irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
- /* if no change, wait aborted for some reason */
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
- rc = -EIO;
- break;
- }
- /* check for change in caller specified modem input */
- if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
- (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
- (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
- (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
- rc = 0;
- break;
- }
- cprev = cnow;
- }
- remove_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
- return rc;
- }
- /* Return state of the serial control/status signals
- *
- * Arguments: info pointer to device instance data
- * value pointer to int to hold returned info
- *
- * Return Value: 0 if success, otherwise error code
- */
- static int get_modem_info(MGSLPC_INFO * info, unsigned int *value)
- {
- unsigned int result;
- unsigned long flags;
- int err;
-
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) |
- ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) |
- ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) |
- ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) |
- ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) |
- ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_get_modem_info %s value=%08Xn", info->device_name, result);
-
- PUT_USER(err,result,value);
- return err ? -EFAULT : 0;
- }
- /* Set the state of the modem control signals (DTR/RTS)
- *
- * Arguments:
- *
- * info pointer to device instance data
- * cmd signal command: TIOCMBIS = set bit TIOCMBIC = clear bit
- * TIOCMSET = set/clear signal values
- * value bit mask for command
- *
- * Return Value: 0 if success, otherwise error code
- */
- static int set_modem_info(MGSLPC_INFO * info, unsigned int cmd,
- unsigned int *value)
- {
- int error;
- unsigned int arg;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_set_modem_info %sn", info->device_name);
-
- GET_USER(error,arg,value);
- if (error)
- return error;
-
- switch (cmd) {
- case TIOCMBIS:
- if (arg & TIOCM_RTS)
- info->serial_signals |= SerialSignal_RTS;
- if (arg & TIOCM_DTR)
- info->serial_signals |= SerialSignal_DTR;
- break;
- case TIOCMBIC:
- if (arg & TIOCM_RTS)
- info->serial_signals &= ~SerialSignal_RTS;
- if (arg & TIOCM_DTR)
- info->serial_signals &= ~SerialSignal_DTR;
- break;
- case TIOCMSET:
- if (arg & TIOCM_RTS)
- info->serial_signals |= SerialSignal_RTS;
- else
- info->serial_signals &= ~SerialSignal_RTS;
-
- if (arg & TIOCM_DTR)
- info->serial_signals |= SerialSignal_DTR;
- else
- info->serial_signals &= ~SerialSignal_DTR;
- break;
- default:
- return -EINVAL;
- }
-
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- return 0;
- }
- /* Set or clear transmit break condition
- *
- * Arguments: tty pointer to tty instance data
- * break_state -1=set break condition, 0=clear
- */
- static void mgslpc_break(struct tty_struct *tty, int break_state)
- {
- MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_break(%s,%d)n",
- __FILE__,__LINE__, info->device_name, break_state);
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_break"))
- return;
- spin_lock_irqsave(&info->lock,flags);
- if (break_state == -1)
- set_reg_bits(info, CHA+DAFO, BIT6);
- else
- clear_reg_bits(info, CHA+DAFO, BIT6);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- /* Service an IOCTL request
- *
- * Arguments:
- *
- * tty pointer to tty instance data
- * file pointer to associated file object for device
- * cmd IOCTL command code
- * arg command argument/context
- *
- * Return Value: 0 if success, otherwise error code
- */
- static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg)
- {
- MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_ioctl %s cmd=%08Xn", __FILE__,__LINE__,
- info->device_name, cmd );
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_ioctl"))
- return -ENODEV;
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
- return ioctl_common(info, cmd, arg);
- }
- int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
- {
- int error;
- struct mgsl_icount cnow; /* kernel counter temps */
- struct serial_icounter_struct *p_cuser; /* user space */
- unsigned long flags;
-
- switch (cmd) {
- case TIOCMGET:
- return get_modem_info(info, (unsigned int *) arg);
- case TIOCMBIS:
- case TIOCMBIC:
- case TIOCMSET:
- return set_modem_info(info, cmd, (unsigned int *) arg);
- case MGSL_IOCGPARAMS:
- return get_params(info,(MGSL_PARAMS *)arg);
- case MGSL_IOCSPARAMS:
- return set_params(info,(MGSL_PARAMS *)arg);
- case MGSL_IOCGTXIDLE:
- return get_txidle(info,(int*)arg);
- case MGSL_IOCSTXIDLE:
- return set_txidle(info,(int)arg);
- case MGSL_IOCGIF:
- return get_interface(info,(int*)arg);
- case MGSL_IOCSIF:
- return set_interface(info,(int)arg);
- case MGSL_IOCTXENABLE:
- return set_txenable(info,(int)arg);
- case MGSL_IOCRXENABLE:
- return set_rxenable(info,(int)arg);
- case MGSL_IOCTXABORT:
- return tx_abort(info);
- case MGSL_IOCGSTATS:
- return get_stats(info,(struct mgsl_icount*)arg);
- case MGSL_IOCWAITEVENT:
- return wait_events(info,(int*)arg);
- case MGSL_IOCCLRMODCOUNT:
- while(MOD_IN_USE)
- MOD_DEC_USE_COUNT;
- return 0;
- case TIOCMIWAIT:
- return modem_input_wait(info,(int)arg);
- case TIOCGICOUNT:
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->lock,flags);
- p_cuser = (struct serial_icounter_struct *) arg;
- PUT_USER(error,cnow.cts, &p_cuser->cts);
- if (error) return error;
- PUT_USER(error,cnow.dsr, &p_cuser->dsr);
- if (error) return error;
- PUT_USER(error,cnow.rng, &p_cuser->rng);
- if (error) return error;
- PUT_USER(error,cnow.dcd, &p_cuser->dcd);
- if (error) return error;
- PUT_USER(error,cnow.rx, &p_cuser->rx);
- if (error) return error;
- PUT_USER(error,cnow.tx, &p_cuser->tx);
- if (error) return error;
- PUT_USER(error,cnow.frame, &p_cuser->frame);
- if (error) return error;
- PUT_USER(error,cnow.overrun, &p_cuser->overrun);
- if (error) return error;
- PUT_USER(error,cnow.parity, &p_cuser->parity);
- if (error) return error;
- PUT_USER(error,cnow.brk, &p_cuser->brk);
- if (error) return error;
- PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
- if (error) return error;
- return 0;
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
- }
- /* Set new termios settings
- *
- * Arguments:
- *
- * tty pointer to tty structure
- * termios pointer to buffer to hold returned old termios
- */
- static void mgslpc_set_termios(struct tty_struct *tty, struct termios *old_termios)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_set_termios %sn", __FILE__,__LINE__,
- tty->driver.name );
-
- /* just return if nothing has changed */
- if ((tty->termios->c_cflag == old_termios->c_cflag)
- && (RELEVANT_IFLAG(tty->termios->c_iflag)
- == RELEVANT_IFLAG(old_termios->c_iflag)))
- return;
- mgslpc_change_params(info);
- /* Handle transition to B0 status */
- if (old_termios->c_cflag & CBAUD &&
- !(tty->termios->c_cflag & CBAUD)) {
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- tty->termios->c_cflag & CBAUD) {
- info->serial_signals |= SerialSignal_DTR;
- if (!(tty->termios->c_cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &tty->flags)) {
- info->serial_signals |= SerialSignal_RTS;
- }
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
- /* Handle turning off CRTSCTS */
- if (old_termios->c_cflag & CRTSCTS &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- tx_release(tty);
- }
- }
- static void mgslpc_close(struct tty_struct *tty, struct file * filp)
- {
- MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
- if (!info || mgslpc_paranoia_check(info, tty->device, "mgslpc_close"))
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_close(%s) entry, count=%dn",
- __FILE__,__LINE__, info->device_name, info->count);
-
- if (!info->count || tty_hung_up_p(filp))
- goto cleanup;
-
- if ((tty->count == 1) && (info->count != 1)) {
- /*
- * tty->count is 1 and the tty structure will be freed.
- * info->count should be one in this case.
- * if it's not, correct it so that the port is shutdown.
- */
- printk("mgslpc_close: bad refcount; tty->count is 1, "
- "info->count is %dn", info->count);
- info->count = 1;
- }
-
- info->count--;
-
- /* if at least one open remaining, leave hardware active */
- if (info->count)
- goto cleanup;
-
- info->flags |= ASYNC_CLOSING;
-
- /* Save the termios structure, since this port may have
- * separate termios for callout and dialin.
- */
- if (info->flags & ASYNC_NORMAL_ACTIVE)
- info->normal_termios = *tty->termios;
- if (info->flags & ASYNC_CALLOUT_ACTIVE)
- info->callout_termios = *tty->termios;
-
- /* set tty->closing to notify line discipline to
- * only process XON/XOFF characters. Only the N_TTY
- * discipline appears to use this (ppp does not).
- */
- tty->closing = 1;
-
- /* wait for transmit data to clear all layers */
-
- if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sentn",
- __FILE__,__LINE__, info->device_name );
- tty_wait_until_sent(tty, info->closing_wait);
- }
-
- if (info->flags & ASYNC_INITIALIZED)
- mgslpc_wait_until_sent(tty, info->timeout);
- if (tty->driver.flush_buffer)
- tty->driver.flush_buffer(tty);
-
- if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer(tty);
-
- shutdown(info);
-
- tty->closing = 0;
- info->tty = 0;
-
- if (info->blocked_open) {
- if (info->close_delay) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(info->close_delay);
- }
- wake_up_interruptible(&info->open_wait);
- }
-
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
- ASYNC_CLOSING);
-
- wake_up_interruptible(&info->close_wait);
-
- cleanup:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_close(%s) exit, count=%dn", __FILE__,__LINE__,
- tty->driver.name, info->count);
- if(MOD_IN_USE)
- MOD_DEC_USE_COUNT;
- }
- /* Wait until the transmitter is empty.
- */
- static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
- {
- MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long orig_jiffies, char_time;
- if (!info )
- return;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_wait_until_sent(%s) entryn",
- __FILE__,__LINE__, info->device_name );
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_wait_until_sent"))
- return;
- if (!(info->flags & ASYNC_INITIALIZED))
- goto exit;
-
- orig_jiffies = jiffies;
-
- /* Set check interval to 1/5 of estimated time to
- * send a character, and make it at least 1. The check
- * interval should also be less than the timeout.
- * Note: use tight timings here to satisfy the NIST-PCTS.
- */
-
- if ( info->params.data_rate ) {
- char_time = info->timeout/(32 * 5);
- if (!char_time)
- char_time++;
- } else
- char_time = 1;
-
- if (timeout)
- char_time = MIN(char_time, timeout);
-
- if (info->params.mode == MGSL_MODE_HDLC) {
- while (info->tx_active) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(char_time);
- if (signal_pending(current))
- break;
- if (timeout && ((orig_jiffies + timeout) < jiffies))
- break;
- }
- } else {
- while ((info->tx_count || info->tx_active) &&
- info->tx_enabled) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(char_time);
- if (signal_pending(current))
- break;
- if (timeout && ((orig_jiffies + timeout) < jiffies))
- break;
- }
- }
-
- exit:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_wait_until_sent(%s) exitn",
- __FILE__,__LINE__, info->device_name );
- }
- /* Called by tty_hangup() when a hangup is signaled.
- * This is the same as closing all open files for the port.
- */
- static void mgslpc_hangup(struct tty_struct *tty)
- {
- MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_hangup(%s)n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_hangup"))
- return;
- mgslpc_flush_buffer(tty);
- shutdown(info);
-
- info->count = 0;
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
- info->tty = 0;
- wake_up_interruptible(&info->open_wait);
- }
- /* Block the current process until the specified port
- * is ready to be opened.
- */
- static int block_til_ready(struct tty_struct *tty, struct file *filp,
- MGSLPC_INFO *info)
- {
- DECLARE_WAITQUEUE(wait, current);
- int retval;
- int do_clocal = 0, extra_count = 0;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready on %sn",
- __FILE__,__LINE__, tty->driver.name );
- if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
- /* this is a callout device */
- /* just verify that normal device is not in use */
- if (info->flags & ASYNC_NORMAL_ACTIVE)
- return -EBUSY;
- if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_SESSION_LOCKOUT) &&
- (info->session != current->session))
- return -EBUSY;
- if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_PGRP_LOCKOUT) &&
- (info->pgrp != current->pgrp))
- return -EBUSY;
- info->flags |= ASYNC_CALLOUT_ACTIVE;
- return 0;
- }
-
- if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
- /* nonblock mode is set or port is not enabled */
- /* just verify that callout device is not active */
- if (info->flags & ASYNC_CALLOUT_ACTIVE)
- return -EBUSY;
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
- if (info->flags & ASYNC_CALLOUT_ACTIVE) {
- if (info->normal_termios.c_cflag & CLOCAL)
- do_clocal = 1;
- } else {
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
- }
-
- /* Wait for carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
- * mgslpc_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
-
- retval = 0;
- add_wait_queue(&info->open_wait, &wait);
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready before block on %s count=%dn",
- __FILE__,__LINE__, tty->driver.name, info->count );
- save_flags(flags); cli();
- if (!tty_hung_up_p(filp)) {
- extra_count = 1;
- info->count--;
- }
- restore_flags(flags);
- info->blocked_open++;
-
- while (1) {
- if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (tty->termios->c_cflag & CBAUD)) {
- spin_lock_irqsave(&info->lock,flags);
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
- set_current_state(TASK_INTERRUPTIBLE);
-
- if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
- retval = (info->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS;
- break;
- }
-
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
- !(info->flags & ASYNC_CLOSING) &&
- (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
- break;
- }
-
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready blocking on %s count=%dn",
- __FILE__,__LINE__, tty->driver.name, info->count );
-
- schedule();
- }
-
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&info->open_wait, &wait);
-
- if (extra_count)
- info->count++;
- info->blocked_open--;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready after blocking on %s count=%dn",
- __FILE__,__LINE__, tty->driver.name, info->count );
-
- if (!retval)
- info->flags |= ASYNC_NORMAL_ACTIVE;
-
- return retval;
- }
- static int mgslpc_open(struct tty_struct *tty, struct file * filp)
- {
- MGSLPC_INFO *info;
- int retval, line;
- unsigned long flags;
- /* verify range of specified line number */
- line = MINOR(tty->device) - tty->driver.minor_start;
- if ((line < 0) || (line >= mgslpc_device_count)) {
- printk("%s(%d):mgslpc_open with illegal line #%d.n",
- __FILE__,__LINE__,line);
- return -ENODEV;
- }
- /* find the info structure for the specified line */
- info = mgslpc_device_list;
- while(info && info->line != line)
- info = info->next_device;
- if ( !info ){
- printk("%s(%d):Can't find specified device on open (line=%d)n",
- __FILE__,__LINE__,line);
- return -ENODEV;
- }
-
- tty->driver_data = info;
- info->tty = tty;
- if (mgslpc_paranoia_check(info, tty->device, "mgslpc_open"))
- return -ENODEV;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_open(%s), old ref count = %dn",
- __FILE__,__LINE__,tty->driver.name, info->count);
- MOD_INC_USE_COUNT;
-
- /* If port is closing, signal caller to try again */
- if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
- if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
- retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- goto cleanup;
- }
-
- info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
- spin_lock_irqsave(&info->netlock, flags);
- if (info->netcount) {
- retval = -EBUSY;
- spin_unlock_irqrestore(&info->netlock, flags);
- goto cleanup;
- }
- info->count++;
- spin_unlock_irqrestore(&info->netlock, flags);
- if (info->count == 1) {
- /* 1st open on this device, init hardware */
- retval = startup(info);
- if (retval < 0)
- goto cleanup;
- }
- retval = block_til_ready(tty, filp, info);
- if (retval) {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready(%s) returned %dn",
- __FILE__,__LINE__, info->device_name, retval);
- goto cleanup;
- }
- if ((info->count == 1) &&
- info->flags & ASYNC_SPLIT_TERMIOS) {
- if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
- *tty->termios = info->normal_termios;
- else
- *tty->termios = info->callout_termios;
- mgslpc_change_params(info);
- }
-
- info->session = current->session;
- info->pgrp = current->pgrp;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_open(%s) successn",
- __FILE__,__LINE__, info->device_name);
- retval = 0;
-
- cleanup:
- if (retval) {
- if(MOD_IN_USE)
- MOD_DEC_USE_COUNT;
- if(info->count)
- info->count--;
- }
-
- return retval;
- }
- /*
- * /proc fs routines....
- */
- static inline int line_info(char *buf, MGSLPC_INFO *info)
- {
- char stat_buf[30];
- int ret;
- unsigned long flags;
- ret = sprintf(buf, "%s:io:%04X irq:%d",
- info->device_name, info->io_base, info->irq_level);
- /* output current serial signal states */
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- stat_buf[0] = 0;
- stat_buf[1] = 0;
- if (info->serial_signals & SerialSignal_RTS)
- strcat(stat_buf, "|RTS");
- if (info->serial_signals & SerialSignal_CTS)
- strcat(stat_buf, "|CTS");
- if (info->serial_signals & SerialSignal_DTR)
- strcat(stat_buf, "|DTR");
- if (info->serial_signals & SerialSignal_DSR)
- strcat(stat_buf, "|DSR");
- if (info->serial_signals & SerialSignal_DCD)
- strcat(stat_buf, "|CD");
- if (info->serial_signals & SerialSignal_RI)
- strcat(stat_buf, "|RI");
- if (info->params.mode == MGSL_MODE_HDLC) {
- ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d",
- info->icount.txok, info->icount.rxok);
- if (info->icount.txunder)
- ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
- if (info->icount.txabort)
- ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
- if (info->icount.rxshort)
- ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
- if (info->icount.rxlong)
- ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
- if (info->icount.rxover)
- ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
- if (info->icount.rxcrc)
- ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxcrc);
- } else {
- ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
- info->icount.tx, info->icount.rx);
- if (info->icount.frame)
- ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
- if (info->icount.parity)
- ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
- if (info->icount.brk)
- ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
- if (info->icount.overrun)
- ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
- }
-
- /* Append serial signal status to end */
- ret += sprintf(buf+ret, " %sn", stat_buf+1);
-
- ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%xn",
- info->tx_active,info->bh_requested,info->bh_running,
- info->pending_bh);
-
- return ret;
- }
- /* Called to print information about devices
- */
- int mgslpc_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
- {
- int len = 0, l;
- off_t begin = 0;
- MGSLPC_INFO *info;
-
- len += sprintf(page, "synclink driver:%sn", driver_version);
-
- info = mgslpc_device_list;
- while( info ) {
- l = line_info(page + len, info);
- len += l;
- if (len+begin > off+count)
- goto done;
- if (len+begin < off) {
- begin += len;
- len = 0;
- }
- info = info->next_device;
- }
- *eof = 1;
- done:
- if (off >= len+begin)
- return 0;
- *start = page + (off-begin);
- return ((count < begin+len-off) ? count : begin+len-off);
- }
- int rx_alloc_buffers(MGSLPC_INFO *info)
- {
- /* each buffer has header and data */
- info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size;
- /* calculate total allocation size for 8 buffers */
- info->rx_buf_total_size = info->rx_buf_size * 8;
- /* limit total allocated memory */
- if (info->rx_buf_total_size > 0x10000)
- info->rx_buf_total_size = 0x10000;
- /* calculate number of buffers */
- info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size;
- info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL);
- if (info->rx_buf == NULL)
- return -ENOMEM;
- rx_reset_buffers(info);
- return 0;
- }
- void rx_free_buffers(MGSLPC_INFO *info)
- {
- if (info->rx_buf)
- kfree(info->rx_buf);
- info->rx_buf = NULL;
- }
- int claim_resources(MGSLPC_INFO *info)
- {
- if (rx_alloc_buffers(info) < 0 ) {
- printk( "Cant allocate rx buffer %sn", info->device_name);
- release_resources(info);
- return -ENODEV;
- }
- return 0;
- }
- void release_resources(MGSLPC_INFO *info)
- {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("release_resources(%s)n", info->device_name);
- rx_free_buffers(info);
- }
- /* Add the specified device instance data structure to the
- * global linked list of devices and increment the device count.
- *
- * Arguments: info pointer to device instance data
- */
- void mgslpc_add_device(MGSLPC_INFO *info)
- {
- info->next_device = NULL;
- info->line = mgslpc_device_count;
- sprintf(info->device_name,"ttySLP%d",info->line);
-
- if (info->line < MAX_DEVICE_COUNT) {
- if (maxframe[info->line])
- info->max_frame_size = maxframe[info->line];
- // info->dosyncppp = dosyncppp[info->line];
- info->dosyncppp = 1;
- }
- mgslpc_device_count++;
-
- if (!mgslpc_device_list)
- mgslpc_device_list = info;
- else {
- MGSLPC_INFO *current_dev = mgslpc_device_list;
- while( current_dev->next_device )
- current_dev = current_dev->next_device;
- current_dev->next_device = info;
- }
-
- if (info->max_frame_size < 4096)
- info->max_frame_size = 4096;
- else if (info->max_frame_size > 65535)
- info->max_frame_size = 65535;
-
- printk( "SyncLink PC Card %s:IO=%04X IRQ=%dn",
- info->device_name, info->io_base, info->irq_level);
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- #ifdef MODULE
- if (info->dosyncppp)
- #endif
- mgslpc_sppp_init(info);
- #endif
- }
- void mgslpc_remove_device(MGSLPC_INFO *remove_info)
- {
- MGSLPC_INFO *info = mgslpc_device_list;
- MGSLPC_INFO *last = NULL;
- while(info) {
- if (info == remove_info) {
- if (last)
- last->next_device = info->next_device;
- else
- mgslpc_device_list = info->next_device;
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- if (info->dosyncppp)
- mgslpc_sppp_delete(info);
- #endif
- release_resources(info);
- kfree(info);
- mgslpc_device_count--;
- return;
- }
- last = info;
- info = info->next_device;
- }
- }
- static int __init synclink_cs_init(void)
- {
- servinfo_t serv;
- EXPORT_NO_SYMBOLS;
-
- if (break_on_load) {
- mgslpc_get_text_ptr();
- BREAKPOINT();
- }
- printk("%s %sn", driver_name, driver_version);
- CardServices(GetCardServicesInfo, &serv);
- if (serv.Revision != CS_RELEASE_CODE) {
- printk(KERN_NOTICE "synclink_cs: Card Services release "
- "does not match!n");
- return -1;
- }
- register_pccard_driver(&dev_info, &mgslpc_attach, &mgslpc_detach);
- /* Initialize the tty_driver structure */
-
- memset(&serial_driver, 0, sizeof(struct tty_driver));
- serial_driver.magic = TTY_DRIVER_MAGIC;
- serial_driver.driver_name = "synclink_cs";
- serial_driver.name = "ttySLP";
- serial_driver.major = ttymajor;
- serial_driver.minor_start = 64;
- serial_driver.num = MAX_DEVICE_COUNT;
- serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
- serial_driver.subtype = SERIAL_TYPE_NORMAL;
- serial_driver.init_termios = tty_std_termios;
- serial_driver.init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver.flags = TTY_DRIVER_REAL_RAW;
- serial_driver.refcount = &serial_refcount;
- serial_driver.table = serial_table;
- serial_driver.termios = serial_termios;
- serial_driver.termios_locked = serial_termios_locked;
- serial_driver.open = mgslpc_open;
- serial_driver.close = mgslpc_close;
- serial_driver.write = mgslpc_write;
- serial_driver.put_char = mgslpc_put_char;
- serial_driver.flush_chars = mgslpc_flush_chars;
- serial_driver.write_room = mgslpc_write_room;
- serial_driver.chars_in_buffer = mgslpc_chars_in_buffer;
- serial_driver.flush_buffer = mgslpc_flush_buffer;
- serial_driver.ioctl = mgslpc_ioctl;
- serial_driver.throttle = mgslpc_throttle;
- serial_driver.unthrottle = mgslpc_unthrottle;
- serial_driver.send_xchar = mgslpc_send_xchar;
- serial_driver.break_ctl = mgslpc_break;
- serial_driver.wait_until_sent = mgslpc_wait_until_sent;
- serial_driver.read_proc = mgslpc_read_proc;
- serial_driver.set_termios = mgslpc_set_termios;
- serial_driver.stop = tx_pause;
- serial_driver.start = tx_release;
- serial_driver.hangup = mgslpc_hangup;
-
- /*
- * The callout device is just like normal device except for
- * major number and the subtype code.
- */
- callout_driver = serial_driver;
- callout_driver.name = "cuaSLP";
- callout_driver.major = cuamajor;
- callout_driver.subtype = SERIAL_TYPE_CALLOUT;
- callout_driver.read_proc = 0;
- callout_driver.proc_entry = 0;
- if (tty_register_driver(&serial_driver) < 0)
- printk("%s(%d):Couldn't register serial drivern",
- __FILE__,__LINE__);
-
- if (tty_register_driver(&callout_driver) < 0)
- printk("%s(%d):Couldn't register callout drivern",
- __FILE__,__LINE__);
- printk("%s %s, tty major#%d callout major#%dn",
- driver_name, driver_version,
- serial_driver.major, callout_driver.major);
-
- return 0;
- }
- static void __exit synclink_cs_exit(void)
- {
- unsigned long flags;
- int rc;
- printk("Unloading %s: version %sn", driver_name, driver_version);
- while(mgslpc_device_list)
- mgslpc_remove_device(mgslpc_device_list);
- save_flags(flags);
- cli();
- if ((rc = tty_unregister_driver(&serial_driver)))
- printk("%s(%d) failed to unregister tty driver err=%dn",
- __FILE__,__LINE__,rc);
- if ((rc = tty_unregister_driver(&callout_driver)))
- printk("%s(%d) failed to unregister callout driver err=%dn",
- __FILE__,__LINE__,rc);
- restore_flags(flags);
- unregister_pccard_driver(&dev_info);
- while (dev_list != NULL) {
- del_timer(&dev_list->release);
- if (dev_list->state & DEV_CONFIG)
- mgslpc_release((u_long)dev_list);
- mgslpc_detach(dev_list);
- }
- }
- module_init(synclink_cs_init);
- module_exit(synclink_cs_exit);
- void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate)
- {
- unsigned int M, N;
- unsigned char val;
- /* note:standard BRG mode is broken in V3.2 chip
- * so enhanced mode is always used
- */
- if (rate) {
- N = 3686400 / rate;
- if (!N)
- N = 1;
- N >>= 1;
- for (M = 1; N > 64 && M < 16; M++)
- N >>= 1;
- N--;
- /* BGR[5..0] = N
- * BGR[9..6] = M
- * BGR[7..0] contained in BGR register
- * BGR[9..8] contained in CCR2[7..6]
- * divisor = (N+1)*2^M
- *
- * Note: M *must* not be zero (causes asymetric duty cycle)
- */
- write_reg(info, (unsigned char) (channel + BGR),
- (unsigned char) ((M << 6) + N));
- val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f;
- val |= ((M << 4) & 0xc0);
- write_reg(info, (unsigned char) (channel + CCR2), val);
- }
- }
- /* Enabled the AUX clock output at the specified frequency.
- */
- void enable_auxclk(MGSLPC_INFO *info)
- {
- unsigned char val;
-
- /* MODE
- *
- * 07..06 MDS[1..0] 10 = transparent HDLC mode
- * 05 ADM Address Mode, 0 = no addr recognition
- * 04 TMD Timer Mode, 0 = external
- * 03 RAC Receiver Active, 0 = inactive
- * 02 RTS 0=RTS active during xmit, 1=RTS always active
- * 01 TRS Timer Resolution, 1=512
- * 00 TLP Test Loop, 0 = no loop
- *
- * 1000 0010
- */
- val = 0x82;
-
- /* channel B RTS is used to enable AUXCLK driver on SP505 */
- if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
- val |= BIT2;
- write_reg(info, CHB + MODE, val);
-
- /* CCR0
- *
- * 07 PU Power Up, 1=active, 0=power down
- * 06 MCE Master Clock Enable, 1=enabled
- * 05 Reserved, 0
- * 04..02 SC[2..0] Encoding
- * 01..00 SM[1..0] Serial Mode, 00=HDLC
- *
- * 11000000
- */
- write_reg(info, CHB + CCR0, 0xc0);
-
- /* CCR1
- *
- * 07 SFLG Shared Flag, 0 = disable shared flags
- * 06 GALP Go Active On Loop, 0 = not used
- * 05 GLP Go On Loop, 0 = not used
- * 04 ODS Output Driver Select, 1=TxD is push-pull output
- * 03 ITF Interframe Time Fill, 0=mark, 1=flag
- * 02..00 CM[2..0] Clock Mode
- *
- * 0001 0111
- */
- write_reg(info, CHB + CCR1, 0x17);
-
- /* CCR2 (Channel B)
- *
- * 07..06 BGR[9..8] Baud rate bits 9..8
- * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
- * 04 SSEL Clock source select, 1=submode b
- * 03 TOE 0=TxCLK is input, 1=TxCLK is output
- * 02 RWX Read/Write Exchange 0=disabled
- * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
- * 00 DIV, data inversion 0=disabled, 1=enabled
- *
- * 0011 1000
- */
- if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
- write_reg(info, CHB + CCR2, 0x38);
- else
- write_reg(info, CHB + CCR2, 0x30);
-
- /* CCR4
- *
- * 07 MCK4 Master Clock Divide by 4, 1=enabled
- * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
- * 05 TST1 Test Pin, 0=normal operation
- * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
- * 03..02 Reserved, must be 0
- * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
- *
- * 0101 0000
- */
- write_reg(info, CHB + CCR4, 0x50);
-
- /* if auxclk not enabled, set internal BRG so
- * CTS transitions can be detected (requires TxC)
- */
- if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
- mgslpc_set_rate(info, CHB, info->params.clock_speed);
- else
- mgslpc_set_rate(info, CHB, 921600);
- }
- static void loopback_enable(MGSLPC_INFO *info)
- {
- unsigned char val;
-
- /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
- val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0);
- write_reg(info, CHA + CCR1, val);
-
- /* CCR2:04 SSEL Clock source select, 1=submode b */
- val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5);
- write_reg(info, CHA + CCR2, val);
-
- /* set LinkSpeed if available, otherwise default to 2Mbps */
- if (info->params.clock_speed)
- mgslpc_set_rate(info, CHA, info->params.clock_speed);
- else
- mgslpc_set_rate(info, CHA, 1843200);
-
- /* MODE:00 TLP Test Loop, 1=loopback enabled */
- val = read_reg(info, CHA + MODE) | BIT0;
- write_reg(info, CHA + MODE, val);
- }
- void hdlc_mode(MGSLPC_INFO *info)
- {
- unsigned char val;
- unsigned char clkmode, clksubmode;
- /* disable all interrupts */
- irq_disable(info, CHA, 0xffff);
- irq_disable(info, CHB, 0xffff);
- port_irq_disable(info, 0xff);
-
- /* assume clock mode 0a, rcv=RxC xmt=TxC */
- clkmode = clksubmode = 0;
- if (info->params.flags & HDLC_FLAG_RXC_DPLL
- && info->params.flags & HDLC_FLAG_TXC_DPLL) {
- /* clock mode 7a, rcv = DPLL, xmt = DPLL */
- clkmode = 7;
- } else if (info->params.flags & HDLC_FLAG_RXC_BRG
- && info->params.flags & HDLC_FLAG_TXC_BRG) {
- /* clock mode 7b, rcv = BRG, xmt = BRG */
- clkmode = 7;
- clksubmode = 1;
- } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) {
- if (info->params.flags & HDLC_FLAG_TXC_BRG) {
- /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
- clkmode = 6;
- clksubmode = 1;
- } else {
- /* clock mode 6a, rcv = DPLL, xmt = TxC */
- clkmode = 6;
- }
- } else if (info->params.flags & HDLC_FLAG_TXC_BRG) {
- /* clock mode 0b, rcv = RxC, xmt = BRG */
- clksubmode = 1;
- }
-
- /* MODE
- *
- * 07..06 MDS[1..0] 10 = transparent HDLC mode
- * 05 ADM Address Mode, 0 = no addr recognition
- * 04 TMD Timer Mode, 0 = external
- * 03 RAC Receiver Active, 0 = inactive
- * 02 RTS 0=RTS active during xmit, 1=RTS always active
- * 01 TRS Timer Resolution, 1=512
- * 00 TLP Test Loop, 0 = no loop
- *
- * 1000 0010
- */
- val = 0x82;
- if (info->params.loopback)
- val |= BIT0;
-
- /* preserve RTS state */
- if (info->serial_signals & SerialSignal_RTS)
- val |= BIT2;
- write_reg(info, CHA + MODE, val);
-
- /* CCR0
- *
- * 07 PU Power Up, 1=active, 0=power down
- * 06 MCE Master Clock Enable, 1=enabled
- * 05 Reserved, 0
- * 04..02 SC[2..0] Encoding
- * 01..00 SM[1..0] Serial Mode, 00=HDLC
- *
- * 11000000
- */
- val = 0xc0;
- switch (info->params.encoding)
- {
- case HDLC_ENCODING_NRZI:
- val |= BIT3;
- break;
- case HDLC_ENCODING_BIPHASE_SPACE:
- val |= BIT4;
- break; // FM0
- case HDLC_ENCODING_BIPHASE_MARK:
- val |= BIT4 + BIT2;
- break; // FM1
- case HDLC_ENCODING_BIPHASE_LEVEL:
- val |= BIT4 + BIT3;
- break; // Manchester
- }
- write_reg(info, CHA + CCR0, val);
-
- /* CCR1
- *
- * 07 SFLG Shared Flag, 0 = disable shared flags
- * 06 GALP Go Active On Loop, 0 = not used
- * 05 GLP Go On Loop, 0 = not used
- * 04 ODS Output Driver Select, 1=TxD is push-pull output
- * 03 ITF Interframe Time Fill, 0=mark, 1=flag
- * 02..00 CM[2..0] Clock Mode
- *
- * 0001 0000
- */
- val = 0x10 + clkmode;
- write_reg(info, CHA + CCR1, val);
-
- /* CCR2
- *
- * 07..06 BGR[9..8] Baud rate bits 9..8
- * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
- * 04 SSEL Clock source select, 1=submode b
- * 03 TOE 0=TxCLK is input, 0=TxCLK is input
- * 02 RWX Read/Write Exchange 0=disabled
- * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
- * 00 DIV, data inversion 0=disabled, 1=enabled
- *
- * 0000 0000
- */
- val = 0x00;
- if (clkmode == 2 || clkmode == 3 || clkmode == 6
- || clkmode == 7 || (clkmode == 0 && clksubmode == 1))
- val |= BIT5;
- if (clksubmode)
- val |= BIT4;
- if (info->params.crc_type == HDLC_CRC_32_CCITT)
- val |= BIT1;
- if (info->params.encoding == HDLC_ENCODING_NRZB)
- val |= BIT0;
- write_reg(info, CHA + CCR2, val);
-
- /* CCR3
- *
- * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
- * 05 EPT Enable preamble transmission, 1=enabled
- * 04 RADD Receive address pushed to FIFO, 0=disabled
- * 03 CRL CRC Reset Level, 0=FFFF
- * 02 RCRC Rx CRC 0=On 1=Off
- * 01 TCRC Tx CRC 0=On 1=Off
- * 00 PSD DPLL Phase Shift Disable
- *
- * 0000 0000
- */
- val = 0x00;
- if (info->params.crc_type == HDLC_CRC_NONE)
- val |= BIT2 + BIT1;
- if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
- val |= BIT5;
- switch (info->params.preamble_length)
- {
- case HDLC_PREAMBLE_LENGTH_16BITS:
- val |= BIT6;
- break;
- case HDLC_PREAMBLE_LENGTH_32BITS:
- val |= BIT6;
- break;
- case HDLC_PREAMBLE_LENGTH_64BITS:
- val |= BIT7 + BIT6;
- break;
- }
- write_reg(info, CHA + CCR3, val);
-
- /* PRE - Preamble pattern */
- val = 0;
- switch (info->params.preamble)
- {
- case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
- case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break;
- case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break;
- case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
- }
- write_reg(info, CHA + PRE, val);
-
- /* CCR4
- *
- * 07 MCK4 Master Clock Divide by 4, 1=enabled
- * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
- * 05 TST1 Test Pin, 0=normal operation
- * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
- * 03..02 Reserved, must be 0
- * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
- *
- * 0101 0000
- */
- val = 0x50;
- write_reg(info, CHA + CCR4, val);
- if (info->params.flags & HDLC_FLAG_RXC_DPLL)
- mgslpc_set_rate(info, CHA, info->params.clock_speed * 16);
- else
- mgslpc_set_rate(info, CHA, info->params.clock_speed);
-
- /* RLCR Receive length check register
- *
- * 7 1=enable receive length check
- * 6..0 Max frame length = (RL + 1) * 32
- */
- write_reg(info, CHA + RLCR, 0);
-
- /* XBCH Transmit Byte Count High
- *
- * 07 DMA mode, 0 = interrupt driven
- * 06 NRM, 0=ABM (ignored)
- * 05 CAS Carrier Auto Start
- * 04 XC Transmit Continuously (ignored)
- * 03..00 XBC[10..8] Transmit byte count bits 10..8
- *
- * 0000 0000
- */
- val = 0x00;
- if (info->params.flags & HDLC_FLAG_AUTO_DCD)
- val |= BIT5;
- write_reg(info, CHA + XBCH, val);
- enable_auxclk(info);
- if (info->params.loopback || info->testing_irq)
- loopback_enable(info);
- if (info->params.flags & HDLC_FLAG_AUTO_CTS)
- {
- irq_enable(info, CHB, IRQ_CTS);
- /* PVR[3] 1=AUTO CTS active */
- set_reg_bits(info, CHA + PVR, BIT3);
- } else
- clear_reg_bits(info, CHA + PVR, BIT3);
- irq_enable(info, CHA,
- IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT +
- IRQ_UNDERRUN + IRQ_TXFIFO);
- issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
- wait_command_complete(info, CHA);
- read_reg16(info, CHA + ISR); /* clear pending IRQs */
-
- /* Master clock mode enabled above to allow reset commands
- * to complete even if no data clocks are present.
- *
- * Disable master clock mode for normal communications because
- * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
- * IRQ when in master clock mode.
- *
- * Leave master clock mode enabled for IRQ test because the
- * timer IRQ used by the test can only happen in master clock mode.
- */
- if (!info->testing_irq)
- clear_reg_bits(info, CHA + CCR0, BIT6);
- tx_set_idle(info);
- tx_stop(info);
- rx_stop(info);
- }
- void rx_stop(MGSLPC_INFO *info)
- {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):rx_stop(%s)n",
- __FILE__,__LINE__, info->device_name );
-
- /* MODE:03 RAC Receiver Active, 0=inactive */
- clear_reg_bits(info, CHA + MODE, BIT3);
- info->rx_enabled = 0;
- info->rx_overflow = 0;
- }
- void rx_start(MGSLPC_INFO *info)
- {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):rx_start(%s)n",
- __FILE__,__LINE__, info->device_name );
- rx_reset_buffers(info);
- info->rx_enabled = 0;
- info->rx_overflow = 0;
- /* MODE:03 RAC Receiver Active, 1=active */
- set_reg_bits(info, CHA + MODE, BIT3);
- info->rx_enabled = 1;
- }
- void tx_start(MGSLPC_INFO *info)
- {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):tx_start(%s)n",
- __FILE__,__LINE__, info->device_name );
-
- if (info->tx_count) {
- /* If auto RTS enabled and RTS is inactive, then assert */
- /* RTS and set a flag indicating that the driver should */
- /* negate RTS when the transmission completes. */
- info->drop_rts_on_tx_done = 0;
- if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
- get_signals(info);
- if (!(info->serial_signals & SerialSignal_RTS)) {
- info->serial_signals |= SerialSignal_RTS;
- set_signals(info);
- info->drop_rts_on_tx_done = 1;
- }
- }
- if (info->params.mode == MGSL_MODE_ASYNC) {
- if (!info->tx_active) {
- info->tx_active = 1;
- tx_ready(info);
- }
- } else {
- info->tx_active = 1;
- tx_ready(info);
- info->tx_timer.expires = jiffies + jiffies_from_ms(5000);
- add_timer(&info->tx_timer);
- }
- }
- if (!info->tx_enabled)
- info->tx_enabled = 1;
- }
- void tx_stop(MGSLPC_INFO *info)
- {
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):tx_stop(%s)n",
- __FILE__,__LINE__, info->device_name );
-
- del_timer(&info->tx_timer);
- info->tx_enabled = 0;
- info->tx_active = 0;
- }
- /* Reset the adapter to a known state and prepare it for further use.
- */
- void reset_device(MGSLPC_INFO *info)
- {
- /* power up both channels (set BIT7) */
- write_reg(info, CHA + CCR0, 0x80);
- write_reg(info, CHB + CCR0, 0x80);
- write_reg(info, CHA + MODE, 0);
- write_reg(info, CHB + MODE, 0);
-
- /* disable all interrupts */
- irq_disable(info, CHA, 0xffff);
- irq_disable(info, CHB, 0xffff);
- port_irq_disable(info, 0xff);
-
- /* PCR Port Configuration Register
- *
- * 07..04 DEC[3..0] Serial I/F select outputs
- * 03 output, 1=AUTO CTS control enabled
- * 02 RI Ring Indicator input 0=active
- * 01 DSR input 0=active
- * 00 DTR output 0=active
- *
- * 0000 0110
- */
- write_reg(info, PCR, 0x06);
-
- /* PVR Port Value Register
- *
- * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
- * 03 AUTO CTS output 1=enabled
- * 02 RI Ring Indicator input
- * 01 DSR input
- * 00 DTR output (1=inactive)
- *
- * 0000 0001
- */
- // write_reg(info, PVR, PVR_DTR);
-
- /* IPC Interrupt Port Configuration
- *
- * 07 VIS 1=Masked interrupts visible
- * 06..05 Reserved, 0
- * 04..03 SLA Slave address, 00 ignored
- * 02 CASM Cascading Mode, 1=daisy chain
- * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
- *
- * 0000 0101
- */
- write_reg(info, IPC, 0x05);
- }
- void async_mode(MGSLPC_INFO *info)
- {
- unsigned char val;
- /* disable all interrupts */
- irq_disable(info, CHA, 0xffff);
- irq_disable(info, CHB, 0xffff);
- port_irq_disable(info, 0xff);
-
- /* MODE
- *
- * 07 Reserved, 0
- * 06 FRTS RTS State, 0=active
- * 05 FCTS Flow Control on CTS
- * 04 FLON Flow Control Enable
- * 03 RAC Receiver Active, 0 = inactive
- * 02 RTS 0=Auto RTS, 1=manual RTS
- * 01 TRS Timer Resolution, 1=512
- * 00 TLP Test Loop, 0 = no loop
- *
- * 0000 0110
- */
- val = 0x06;
- if (info->params.loopback)
- val |= BIT0;
-
- /* preserve RTS state */
- if (!(info->serial_signals & SerialSignal_RTS))
- val |= BIT6;
- write_reg(info, CHA + MODE, val);
-
- /* CCR0
- *
- * 07 PU Power Up, 1=active, 0=power down
- * 06 MCE Master Clock Enable, 1=enabled
- * 05 Reserved, 0
- * 04..02 SC[2..0] Encoding, 000=NRZ
- * 01..00 SM[1..0] Serial Mode, 11=Async
- *
- * 1000 0011
- */
- write_reg(info, CHA + CCR0, 0x83);
-
- /* CCR1
- *
- * 07..05 Reserved, 0
- * 04 ODS Output Driver Select, 1=TxD is push-pull output
- * 03 BCR Bit Clock Rate, 1=16x
- * 02..00 CM[2..0] Clock Mode, 111=BRG
- *
- * 0001 1111
- */
- write_reg(info, CHA + CCR1, 0x1f);
-
- /* CCR2 (channel A)
- *
- * 07..06 BGR[9..8] Baud rate bits 9..8
- * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
- * 04 SSEL Clock source select, 1=submode b
- * 03 TOE 0=TxCLK is input, 0=TxCLK is input
- * 02 RWX Read/Write Exchange 0=disabled
- * 01 Reserved, 0
- * 00 DIV, data inversion 0=disabled, 1=enabled
- *
- * 0001 0000
- */
- write_reg(info, CHA + CCR2, 0x10);
-
- /* CCR3
- *
- * 07..01 Reserved, 0
- * 00 PSD DPLL Phase Shift Disable
- *
- * 0000 0000
- */
- write_reg(info, CHA + CCR3, 0);
-
- /* CCR4
- *
- * 07 MCK4 Master Clock Divide by 4, 1=enabled
- * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
- * 05 TST1 Test Pin, 0=normal operation
- * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
- * 03..00 Reserved, must be 0
- *
- * 0101 0000
- */
- write_reg(info, CHA + CCR4, 0x50);
- mgslpc_set_rate(info, CHA, info->params.data_rate * 16);
-
- /* DAFO Data Format
- *
- * 07 Reserved, 0
- * 06 XBRK transmit break, 0=normal operation
- * 05 Stop bits (0=1, 1=2)
- * 04..03 PAR[1..0] Parity (01=odd, 10=even)
- * 02 PAREN Parity Enable
- * 01..00 CHL[1..0] Character Length (00=8, 01=7)
- *
- */
- val = 0x00;
- if (info->params.data_bits != 8)
- val |= BIT0; /* 7 bits */
- if (info->params.stop_bits != 1)
- val |= BIT5;
- if (info->params.parity != ASYNC_PARITY_NONE)
- {
- val |= BIT2; /* Parity enable */
- if (info->params.parity == ASYNC_PARITY_ODD)
- val |= BIT3;
- else
- val |= BIT4;
- }
- write_reg(info, CHA + DAFO, val);
-
- /* RFC Rx FIFO Control
- *
- * 07 Reserved, 0
- * 06 DPS, 1=parity bit not stored in data byte
- * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
- * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
- * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
- * 01 Reserved, 0
- * 00 TCDE Terminate Char Detect Enable, 0=disabled
- *
- * 0101 1100
- */
- write_reg(info, CHA + RFC, 0x5c);
-
- /* RLCR Receive length check register
- *
- * Max frame length = (RL + 1) * 32
- */
- write_reg(info, CHA + RLCR, 0);
-
- /* XBCH Transmit Byte Count High
- *
- * 07 DMA mode, 0 = interrupt driven
- * 06 NRM, 0=ABM (ignored)
- * 05 CAS Carrier Auto Start
- * 04 XC Transmit Continuously (ignored)
- * 03..00 XBC[10..8] Transmit byte count bits 10..8
- *
- * 0000 0000
- */
- val = 0x00;
- if (info->params.flags & HDLC_FLAG_AUTO_DCD)
- val |= BIT5;
- write_reg(info, CHA + XBCH, val);
- if (info->params.flags & HDLC_FLAG_AUTO_CTS)
- irq_enable(info, CHA, IRQ_CTS);
-
- /* MODE:03 RAC Receiver Active, 1=active */
- set_reg_bits(info, CHA + MODE, BIT3);
- enable_auxclk(info);
- if (info->params.flags & HDLC_FLAG_AUTO_CTS) {
- irq_enable(info, CHB, IRQ_CTS);
- /* PVR[3] 1=AUTO CTS active */
- set_reg_bits(info, CHA + PVR, BIT3);
- } else
- clear_reg_bits(info, CHA + PVR, BIT3);
- irq_enable(info, CHA,
- IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME +
- IRQ_ALLSENT + IRQ_TXFIFO);
- issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
- wait_command_complete(info, CHA);
- read_reg16(info, CHA + ISR); /* clear pending IRQs */
- }
- /* Set the HDLC idle mode for the transmitter.
- */
- void tx_set_idle(MGSLPC_INFO *info)
- {
- /* Note: ESCC2 only supports flags and one idle modes */
- if (info->idle_mode == HDLC_TXIDLE_FLAGS)
- set_reg_bits(info, CHA + CCR1, BIT3);
- else
- clear_reg_bits(info, CHA + CCR1, BIT3);
- }
- /* get state of the V24 status (input) signals.
- */
- void get_signals(MGSLPC_INFO *info)
- {
- unsigned char status = 0;
-
- /* preserve DTR and RTS */
- info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
- if (read_reg(info, CHB + VSTR) & BIT7)
- info->serial_signals |= SerialSignal_DCD;
- if (read_reg(info, CHB + STAR) & BIT1)
- info->serial_signals |= SerialSignal_CTS;
- status = read_reg(info, CHA + PVR);
- if (!(status & PVR_RI))
- info->serial_signals |= SerialSignal_RI;
- if (!(status & PVR_DSR))
- info->serial_signals |= SerialSignal_DSR;
- }
- /* Set the state of DTR and RTS based on contents of
- * serial_signals member of device extension.
- */
- void set_signals(MGSLPC_INFO *info)
- {
- unsigned char val;
- val = read_reg(info, CHA + MODE);
- if (info->params.mode == MGSL_MODE_ASYNC) {
- if (info->serial_signals & SerialSignal_RTS)
- val &= ~BIT6;
- else
- val |= BIT6;
- } else {
- if (info->serial_signals & SerialSignal_RTS)
- val |= BIT2;
- else
- val &= ~BIT2;
- }
- write_reg(info, CHA + MODE, val);
- if (info->serial_signals & SerialSignal_DTR)
- clear_reg_bits(info, CHA + PVR, PVR_DTR);
- else
- set_reg_bits(info, CHA + PVR, PVR_DTR);
- }
- void rx_reset_buffers(MGSLPC_INFO *info)
- {
- RXBUF *buf;
- int i;
- info->rx_put = 0;
- info->rx_get = 0;
- info->rx_frame_count = 0;
- for (i=0 ; i < info->rx_buf_count ; i++) {
- buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size));
- buf->status = buf->count = 0;
- }
- }
- /* Attempt to return a received HDLC frame
- * Only frames received without errors are returned.
- *
- * Returns 1 if frame returned, otherwise 0
- */
- int rx_get_frame(MGSLPC_INFO *info)
- {
- unsigned short status;
- RXBUF *buf;
- unsigned int framesize = 0;
- unsigned long flags;
- struct tty_struct *tty = info->tty;
- int return_frame = 0;
-
- if (info->rx_frame_count == 0)
- return 0;
- buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size));
- status = buf->status;
- /* 07 VFR 1=valid frame
- * 06 RDO 1=data overrun
- * 05 CRC 1=OK, 0=error
- * 04 RAB 1=frame aborted
- */
- if ((status & 0xf0) != 0xA0) {
- if (!(status & BIT7) || (status & BIT4))
- info->icount.rxabort++;
- else if (status & BIT6)
- info->icount.rxover++;
- else if (!(status & BIT5)) {
- info->icount.rxcrc++;
- if (info->params.crc_type & HDLC_CRC_RETURN_EX)
- return_frame = 1;
- }
- framesize = 0;
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- info->netstats.rx_errors++;
- info->netstats.rx_frame_errors++;
- #endif
- } else
- return_frame = 1;
- if (return_frame)
- framesize = buf->count;
- if (debug_level >= DEBUG_LEVEL_BH)
- printk("%s(%d):rx_get_frame(%s) status=%04X size=%dn",
- __FILE__,__LINE__,info->device_name,status,framesize);
-
- if (debug_level >= DEBUG_LEVEL_DATA)
- trace_block(info, buf->data, framesize, 0);
-
- if (framesize) {
- if ((info->params.crc_type & HDLC_CRC_RETURN_EX &&
- framesize+1 > info->max_frame_size) ||
- framesize > info->max_frame_size)
- info->icount.rxlong++;
- else {
- if (status & BIT5)
- info->icount.rxok++;
- if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
- *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR;
- ++framesize;
- }
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- if (info->netcount) {
- /* pass frame to syncppp device */
- mgslpc_sppp_rx_done(info, buf->data, framesize);
- }
- else
- #endif
- {
- /* Call the line discipline receive callback directly. */
- if (tty && tty->ldisc.receive_buf)
- tty->ldisc.receive_buf(tty, buf->data, info->flag_buf, framesize);
- }
- }
- }
- spin_lock_irqsave(&info->lock,flags);
- buf->status = buf->count = 0;
- info->rx_frame_count--;
- info->rx_get++;
- if (info->rx_get >= info->rx_buf_count)
- info->rx_get = 0;
- spin_unlock_irqrestore(&info->lock,flags);
- return 1;
- }
- BOOLEAN register_test(MGSLPC_INFO *info)
- {
- static unsigned char patterns[] =
- { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
- static unsigned int count = sizeof(patterns) / sizeof(patterns[0]);
- unsigned int i;
- BOOLEAN rc = TRUE;
- unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
- reset_device(info);
- for (i = 0; i < count; i++) {
- write_reg(info, XAD1, patterns[i]);
- write_reg(info, XAD2, patterns[(i + 1) % count]);
- if ((read_reg(info, XAD1) != patterns[i]) ||
- (read_reg(info, XAD2) != patterns[(i + 1) % count])) {
- rc = FALSE;
- break;
- }
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return rc;
- }
- BOOLEAN irq_test(MGSLPC_INFO *info)
- {
- unsigned long end_time;
- unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
- reset_device(info);
- info->testing_irq = TRUE;
- hdlc_mode(info);
- info->irq_occurred = FALSE;
- /* init hdlc mode */
- irq_enable(info, CHA, IRQ_TIMER);
- write_reg(info, CHA + TIMR, 0); /* 512 cycles */
- issue_command(info, CHA, CMD_START_TIMER);
- spin_unlock_irqrestore(&info->lock,flags);
- end_time=100;
- while(end_time-- && !info->irq_occurred) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(jiffies_from_ms(10));
- }
-
- info->testing_irq = FALSE;
- spin_lock_irqsave(&info->lock,flags);
- reset_device(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- return info->irq_occurred ? TRUE : FALSE;
- }
- int adapter_test(MGSLPC_INFO *info)
- {
- if (!register_test(info)) {
- info->init_error = DiagStatus_AddressFailure;
- printk( "%s(%d):Register test failure for device %s Addr=%04Xn",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
- return -ENODEV;
- }
- if (!irq_test(info)) {
- info->init_error = DiagStatus_IrqFailure;
- printk( "%s(%d):Interrupt test failure for device %s IRQ=%dn",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
- return -ENODEV;
- }
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):device %s passed diagnosticsn",
- __FILE__,__LINE__,info->device_name);
- return 0;
- }
- void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
- {
- int i;
- int linecount;
- if (xmit)
- printk("%s tx data:n",info->device_name);
- else
- printk("%s rx data:n",info->device_name);
-
- while(count) {
- if (count > 16)
- linecount = 16;
- else
- linecount = count;
-
- for(i=0;i<linecount;i++)
- printk("%02X ",(unsigned char)data[i]);
- for(;i<17;i++)
- printk(" ");
- for(i=0;i<linecount;i++) {
- if (data[i]>=040 && data[i]<=0176)
- printk("%c",data[i]);
- else
- printk(".");
- }
- printk("n");
-
- data += linecount;
- count -= linecount;
- }
- }
- /* HDLC frame time out
- * update stats and do tx completion processing
- */
- void tx_timeout(unsigned long context)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO*)context;
- unsigned long flags;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):tx_timeout(%s)n",
- __FILE__,__LINE__,info->device_name);
- if(info->tx_active &&
- info->params.mode == MGSL_MODE_HDLC) {
- info->icount.txtimeout++;
- }
- spin_lock_irqsave(&info->lock,flags);
- info->tx_active = 0;
- info->tx_count = info->tx_put = info->tx_get = 0;
- spin_unlock_irqrestore(&info->lock,flags);
-
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- if (info->netcount)
- mgslpc_sppp_tx_done(info);
- else
- #endif
- bh_transmit(info);
- }
- #ifdef CONFIG_SYNCLINK_SYNCPPP
- /* syncppp net device routines
- */
- void mgslpc_sppp_init(MGSLPC_INFO *info)
- {
- struct net_device *d;
- sprintf(info->netname,"mgslp%d",info->line);
- info->if_ptr = &info->pppdev;
- info->netdev = info->pppdev.dev = &info->netdevice;
- sppp_attach(&info->pppdev);
- d = info->netdev;
- strcpy(d->name,info->netname);
- d->base_addr = info->io_base;
- d->irq = info->irq_level;
- d->priv = info;
- d->init = NULL;
- d->open = mgslpc_sppp_open;
- d->stop = mgslpc_sppp_close;
- d->hard_start_xmit = mgslpc_sppp_tx;
- d->do_ioctl = mgslpc_sppp_ioctl;
- d->get_stats = mgslpc_net_stats;
- d->tx_timeout = mgslpc_sppp_tx_timeout;
- d->watchdog_timeo = 10*HZ;
- #if LINUX_VERSION_CODE < VERSION(2,4,4)
- dev_init_buffers(d);
- #endif
- if (register_netdev(d) == -1) {
- printk(KERN_WARNING "%s: register_netdev failed.n", d->name);
- sppp_detach(info->netdev);
- return;
- }
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_sppp_init()n");
- }
- void mgslpc_sppp_delete(MGSLPC_INFO *info)
- {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_sppp_delete(%s)n",info->netname);
- sppp_detach(info->netdev);
- unregister_netdev(info->netdev);
- }
- int mgslpc_sppp_open(struct net_device *d)
- {
- MGSLPC_INFO *info = d->priv;
- int err, flags;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_sppp_open(%s)n",info->netname);
- spin_lock_irqsave(&info->netlock, flags);
- if (info->count != 0 || info->netcount != 0) {
- printk(KERN_WARNING "%s: sppp_open returning busyn", info->netname);
- spin_unlock_irqrestore(&info->netlock, flags);
- return -EBUSY;
- }
- info->netcount=1;
- MOD_INC_USE_COUNT;
- spin_unlock_irqrestore(&info->netlock, flags);
- /* claim resources and init adapter */
- if ((err = startup(info)) != 0)
- goto open_fail;
- /* allow syncppp module to do open processing */
- if ((err = sppp_open(d)) != 0) {
- shutdown(info);
- goto open_fail;
- }
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- mgslpc_program_hw(info);
- d->trans_start = jiffies;
- netif_start_queue(d);
- return 0;
- open_fail:
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- MOD_DEC_USE_COUNT;
- spin_unlock_irqrestore(&info->netlock, flags);
- return err;
- }
- void mgslpc_sppp_tx_timeout(struct net_device *dev)
- {
- MGSLPC_INFO *info = dev->priv;
- int flags;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_sppp_tx_timeout(%s)n",info->netname);
- info->netstats.tx_errors++;
- info->netstats.tx_aborted_errors++;
- spin_lock_irqsave(&info->lock,flags);
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
- netif_wake_queue(dev);
- }
- int mgslpc_sppp_tx(struct sk_buff *skb, struct net_device *dev)
- {
- MGSLPC_INFO *info = dev->priv;
- unsigned long flags;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_sppp_tx(%s)n",info->netname);
- netif_stop_queue(dev);
- info->tx_count = skb->len;
- memcpy(info->tx_buf, skb->data, skb->len);
- info->tx_get = 0;
- info->tx_put = info->tx_count = skb->len;
- info->netstats.tx_packets++;
- info->netstats.tx_bytes += skb->len;
- dev_kfree_skb(skb);
- dev->trans_start = jiffies;
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
- }
- int mgslpc_sppp_close(struct net_device *d)
- {
- MGSLPC_INFO *info = d->priv;
- unsigned long flags;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_sppp_close(%s)n",info->netname);
- /* shutdown adapter and release resources */
- shutdown(info);
- /* allow syncppp to do close processing */
- sppp_close(d);
- netif_stop_queue(d);
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- MOD_DEC_USE_COUNT;
- spin_unlock_irqrestore(&info->netlock, flags);
- return 0;
- }
- void mgslpc_sppp_rx_done(MGSLPC_INFO *info, char *buf, int size)
- {
- struct sk_buff *skb = dev_alloc_skb(size);
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_sppp_rx_done(%s)n",info->netname);
- if (skb == NULL) {
- printk(KERN_NOTICE "%s: cant alloc skb, dropping packetn",
- info->netname);
- info->netstats.rx_dropped++;
- return;
- }
- memcpy(skb_put(skb, size),buf,size);
- skb->protocol = htons(ETH_P_WAN_PPP);
- skb->dev = info->netdev;
- skb->mac.raw = skb->data;
- info->netstats.rx_packets++;
- info->netstats.rx_bytes += size;
- netif_rx(skb);
- info->netdev->trans_start = jiffies;
- }
- void mgslpc_sppp_tx_done(MGSLPC_INFO *info)
- {
- if (netif_queue_stopped(info->netdev))
- netif_wake_queue(info->netdev);
- }
- struct net_device_stats *mgslpc_net_stats(struct net_device *dev)
- {
- MGSLPC_INFO *info = dev->priv;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_net_stats(%s)n",info->netname);
- return &info->netstats;
- }
- int mgslpc_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
- {
- MGSLPC_INFO *info = (MGSLPC_INFO *)dev->priv;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_ioctl %s cmd=%08Xn", __FILE__,__LINE__,
- info->netname, cmd );
- return sppp_do_ioctl(dev, ifr, cmd);
- }
- #endif /* ifdef CONFIG_SYNCLINK_SYNCPPP */