smc-ircc.c
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上传日期:2013-02-24
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- /*********************************************************************
- *
- * Filename: smc-ircc.c
- * Version: 0.4
- * Description: Driver for the SMC Infrared Communications Controller
- * Status: Experimental.
- * Author: Thomas Davis (tadavis@jps.net)
- * Created at:
- * Modified at: Tue Feb 22 10:05:06 2000
- * Modified by: Dag Brattli <dag@brattli.net>
- * Modified at: Tue Jun 26 2001
- * Modified by: Stefani Seibold <stefani@seibold.net>
- *
- * Copyright (c) 2001 Stefani Seibold
- * Copyright (c) 1999-2001 Dag Brattli
- * Copyright (c) 1998-1999 Thomas Davis,
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
- * SIO's: all SIO documentet by SMC (June, 2001)
- * Applicable Models : Fujitsu Lifebook 635t, Sony PCG-505TX,
- * Dell Inspiron 8000
- *
- ********************************************************************/
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/skbuff.h>
- #include <linux/netdevice.h>
- #include <linux/ioport.h>
- #include <linux/delay.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- #include <linux/rtnetlink.h>
- #include <linux/serial_reg.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <asm/byteorder.h>
- #include <linux/pm.h>
- #include <net/irda/wrapper.h>
- #include <net/irda/irda.h>
- #include <net/irda/irmod.h>
- #include <net/irda/irlap_frame.h>
- #include <net/irda/irda_device.h>
- #include <net/irda/smc-ircc.h>
- #include <net/irda/irport.h>
- struct smc_chip {
- char *name;
- u16 flags;
- u8 devid;
- u8 rev;
- };
- typedef struct smc_chip smc_chip_t;
- static const char *driver_name = "smc-ircc";
- #define DIM(x) (sizeof(x)/(sizeof(*(x))))
- #define CHIP_IO_EXTENT 8
- static struct ircc_cb *dev_self[] = { NULL, NULL};
- /* Some prototypes */
- static int ircc_open(unsigned int iobase, unsigned int board_addr);
- static int ircc_dma_receive(struct ircc_cb *self, int iobase);
- static void ircc_dma_receive_complete(struct ircc_cb *self, int iobase);
- static int ircc_hard_xmit(struct sk_buff *skb, struct net_device *dev);
- static void ircc_dma_xmit(struct ircc_cb *self, int iobase, int bofs);
- static void ircc_change_speed(void *priv, u32 speed);
- static void ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static int ircc_net_open(struct net_device *dev);
- static int ircc_net_close(struct net_device *dev);
- static int ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
- #define KEY55_1 0 /* SuperIO Configuration mode with Key <0x55> */
- #define KEY55_2 1 /* SuperIO Configuration mode with Key <0x55,0x55> */
- #define NoIRDA 2 /* SuperIO Chip has no IRDA Port */
- #define SIR 0 /* SuperIO Chip has only slow IRDA */
- #define FIR 4 /* SuperIO Chip has fast IRDA */
- #define SERx4 8 /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
- /* These are the currently known SMC SuperIO chipsets */
- static smc_chip_t __initdata fdc_chips_flat[]=
- {
- /* Base address 0x3f0 or 0x370 */
- { "37C44", KEY55_1|NoIRDA, 0x00, 0x00 }, /* This chip can not detected */
- { "37C665GT", KEY55_2|NoIRDA, 0x65, 0x01 },
- { "37C665GT", KEY55_2|NoIRDA, 0x66, 0x01 },
- { "37C669", KEY55_2|SIR|SERx4, 0x03, 0x02 },
- { "37C669", KEY55_2|SIR|SERx4, 0x04, 0x02 }, /* ID? */
- { "37C78", KEY55_2|NoIRDA, 0x78, 0x00 },
- { "37N769", KEY55_1|FIR|SERx4, 0x28, 0x00 },
- { "37N869", KEY55_1|FIR|SERx4, 0x29, 0x00 },
- { NULL }
- };
- static smc_chip_t __initdata fdc_chips_paged[]=
- {
- /* Base address 0x3f0 or 0x370 */
- { "37B72X", KEY55_1|SIR|SERx4, 0x4c, 0x00 },
- { "37B77X", KEY55_1|SIR|SERx4, 0x43, 0x00 },
- { "37B78X", KEY55_1|SIR|SERx4, 0x44, 0x00 },
- { "37B80X", KEY55_1|SIR|SERx4, 0x42, 0x00 },
- { "37C67X", KEY55_1|FIR|SERx4, 0x40, 0x00 },
- { "37C93X", KEY55_2|SIR|SERx4, 0x02, 0x01 },
- { "37C93XAPM", KEY55_1|SIR|SERx4, 0x30, 0x01 },
- { "37C93XFR", KEY55_2|FIR|SERx4, 0x03, 0x01 },
- { "37M707", KEY55_1|SIR|SERx4, 0x42, 0x00 },
- { "37M81X", KEY55_1|SIR|SERx4, 0x4d, 0x00 },
- { "37N958FR", KEY55_1|FIR|SERx4, 0x09, 0x04 },
- { "37N971", KEY55_1|FIR|SERx4, 0x0a, 0x00 },
- { "37N972", KEY55_1|FIR|SERx4, 0x0b, 0x00 },
- { NULL }
- };
- static smc_chip_t __initdata lpc_chips_flat[]=
- {
- /* Base address 0x2E or 0x4E */
- { "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
- { "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
- { NULL }
- };
- static smc_chip_t __initdata lpc_chips_paged[]=
- {
- /* Base address 0x2E or 0x4E */
- { "47B27X", KEY55_1|SIR|SERx4, 0x51, 0x00 },
- { "47B37X", KEY55_1|SIR|SERx4, 0x52, 0x00 },
- { "47M10X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
- { "47M120", KEY55_1|NoIRDA|SERx4, 0x5c, 0x00 },
- { "47M13X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
- { "47M14X", KEY55_1|SIR|SERx4, 0x5f, 0x00 },
- { "47N252", KEY55_1|FIR|SERx4, 0x0e, 0x00 },
- { "47S42X", KEY55_1|SIR|SERx4, 0x57, 0x00 },
- { NULL }
- };
- static int ircc_irq=255;
- static int ircc_dma=255;
- static int ircc_fir=0;
- static int ircc_sir=0;
- static int ircc_cfg=0;
- static unsigned short dev_count=0;
- static inline void register_bank(int iobase, int bank)
- {
- outb(((inb(iobase+IRCC_MASTER) & 0xf0) | (bank & 0x07)),
- iobase+IRCC_MASTER);
- }
- static int __init smc_access(unsigned short cfg_base,unsigned char reg)
- {
- IRDA_DEBUG(0, __FUNCTION__ "()n");
- outb(reg, cfg_base);
- if (inb(cfg_base)!=reg)
- return -1;
- return 0;
- }
- static const smc_chip_t * __init smc_probe(unsigned short cfg_base,u8 reg,const smc_chip_t *chip,char *type)
- {
- u8 devid,xdevid,rev;
- IRDA_DEBUG(0, __FUNCTION__ "()n");
- /* Leave configuration */
- outb(0xaa, cfg_base);
- if (inb(cfg_base)==0xaa) /* not a smc superio chip */
- return NULL;
- outb(reg, cfg_base);
- xdevid=inb(cfg_base+1);
- /* Enter configuration */
- outb(0x55, cfg_base);
- if (smc_access(cfg_base,0x55)) /* send second key and check */
- return NULL;
- /* probe device ID */
- if (smc_access(cfg_base,reg))
- return NULL;
- devid=inb(cfg_base+1);
- if (devid==0) /* typical value for unused port */
- return NULL;
- if (devid==0xff) /* typical value for unused port */
- return NULL;
- /* probe revision ID */
- if (smc_access(cfg_base,reg+1))
- return NULL;
- rev=inb(cfg_base+1);
- if (rev>=128) /* i think this will make no sense */
- return NULL;
- if (devid==xdevid) /* protection against false positives */
- return NULL;
- /* Check for expected device ID; are there others? */
- while(chip->devid!=devid) {
- chip++;
- if (chip->name==NULL)
- return NULL;
- }
- if (chip->rev>rev)
- return NULL;
- MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%sn",devid,rev,cfg_base,type,chip->name);
-
- if (chip->flags&NoIRDA)
- MESSAGE("chipset does not support IRDAn");
- return chip;
- }
- /*
- * Function smc_superio_flat (chip, base, type)
- *
- * Try get configuration of a smc SuperIO chip with flat register model
- *
- */
- static int __init smc_superio_flat(const smc_chip_t *chips, unsigned short cfg_base, char *type)
- {
- unsigned short fir_io;
- unsigned short sir_io;
- u8 mode;
- int ret = -ENODEV;
- IRDA_DEBUG(0, __FUNCTION__ "()n");
- if (smc_probe(cfg_base,0xD,chips,type)==NULL)
- return ret;
- outb(0x0c, cfg_base);
- mode = inb(cfg_base+1);
- mode = (mode & 0x38) >> 3;
-
- /* Value for IR port */
- if (mode && mode < 4) {
- /* SIR iobase */
- outb(0x25, cfg_base);
- sir_io = inb(cfg_base+1) << 2;
- /* FIR iobase */
- outb(0x2b, cfg_base);
- fir_io = inb(cfg_base+1) << 3;
- if (fir_io) {
- if (ircc_open(fir_io, sir_io) == 0)
- ret=0;
- }
- }
-
- /* Exit configuration */
- outb(0xaa, cfg_base);
- return ret;
- }
- /*
- * Function smc_superio_paged (chip, base, type)
- *
- * Try get configuration of a smc SuperIO chip with paged register model
- *
- */
- static int __init smc_superio_paged(const smc_chip_t *chips, unsigned short cfg_base, char *type)
- {
- unsigned short fir_io;
- unsigned short sir_io;
- int ret = -ENODEV;
-
- IRDA_DEBUG(0, __FUNCTION__ "()n");
- if (smc_probe(cfg_base,0x20,chips,type)==NULL)
- return ret;
-
- /* Select logical device (UART2) */
- outb(0x07, cfg_base);
- outb(0x05, cfg_base + 1);
-
- /* SIR iobase */
- outb(0x60, cfg_base);
- sir_io = inb(cfg_base + 1) << 8;
- outb(0x61, cfg_base);
- sir_io |= inb(cfg_base + 1);
-
- /* Read FIR base */
- outb(0x62, cfg_base);
- fir_io = inb(cfg_base + 1) << 8;
- outb(0x63, cfg_base);
- fir_io |= inb(cfg_base + 1);
- outb(0x2b, cfg_base); /* ??? */
- if (fir_io) {
- if (ircc_open(fir_io, sir_io) == 0)
- ret=0;
- }
-
- /* Exit configuration */
- outb(0xaa, cfg_base);
- return ret;
- }
- static int __init smc_superio_fdc(unsigned short cfg_base)
- {
- if (check_region(cfg_base, 2) < 0) {
- IRDA_DEBUG(0, __FUNCTION__ ": can't get cfg_base of 0x%03xn",
- cfg_base);
- return -1;
- }
- if (!smc_superio_flat(fdc_chips_flat,cfg_base,"FDC")||!smc_superio_paged(fdc_chips_paged,cfg_base,"FDC"))
- return 0;
- return -1;
- }
- static int __init smc_superio_lpc(unsigned short cfg_base)
- {
- #if 0
- if (check_region(cfg_base, 2) < 0) {
- IRDA_DEBUG(0, __FUNCTION__ ": can't get cfg_base of 0x%03xn",
- cfg_base);
- return -1;
- }
- #endif
- if (!smc_superio_flat(lpc_chips_flat,cfg_base,"LPC")||!smc_superio_paged(lpc_chips_paged,cfg_base,"LPC"))
- return 0;
- return -1;
- }
- /*
- * Function ircc_init ()
- *
- * Initialize chip. Just try to find out how many chips we are dealing with
- * and where they are
- */
- int __init ircc_init(void)
- {
- int ret=-ENODEV;
- IRDA_DEBUG(0, __FUNCTION__ "n");
- dev_count=0;
- if ((ircc_fir>0)&&(ircc_sir>0)) {
- MESSAGE(" Overriding FIR address 0x%04xn", ircc_fir);
- MESSAGE(" Overriding SIR address 0x%04xn", ircc_sir);
- if (ircc_open(ircc_fir, ircc_sir) == 0)
- return 0;
- return -ENODEV;
- }
- /* try user provided configuration register base address */
- if (ircc_cfg>0) {
- MESSAGE(" Overriding configuration address 0x%04xn", ircc_cfg);
- if (!smc_superio_fdc(ircc_cfg))
- ret=0;
- }
- /* Trys to open for all the SMC chipsets we know about */
- IRDA_DEBUG(0, __FUNCTION__
- " Try to open all known SMC chipsetsn");
- if (!smc_superio_fdc(0x3f0))
- ret=0;
- if (!smc_superio_fdc(0x370))
- ret=0;
- if (!smc_superio_fdc(0xe0))
- ret=0;
- if (!smc_superio_lpc(0x2e))
- ret=0;
- if (!smc_superio_lpc(0x4e))
- ret=0;
- return ret;
- }
- /*
- * Function ircc_open (iobase, irq)
- *
- * Try to open driver instance
- *
- */
- static int __init ircc_open(unsigned int fir_base, unsigned int sir_base)
- {
- struct ircc_cb *self;
- struct irport_cb *irport;
- unsigned char low, high, chip, config, dma, irq, version;
- IRDA_DEBUG(0, __FUNCTION__ "n");
- if (check_region(fir_base, CHIP_IO_EXTENT) < 0) {
- IRDA_DEBUG(0, __FUNCTION__ ": can't get fir_base of 0x%03xn",
- fir_base);
- return -ENODEV;
- }
- #if POSSIBLE_USED_BY_SERIAL_DRIVER
- if (check_region(sir_base, CHIP_IO_EXTENT) < 0) {
- IRDA_DEBUG(0, __FUNCTION__ ": can't get sir_base of 0x%03xn",
- sir_base);
- return -ENODEV;
- }
- #endif
- register_bank(fir_base, 3);
- high = inb(fir_base+IRCC_ID_HIGH);
- low = inb(fir_base+IRCC_ID_LOW);
- chip = inb(fir_base+IRCC_CHIP_ID);
- version = inb(fir_base+IRCC_VERSION);
- config = inb(fir_base+IRCC_INTERFACE);
- irq = config >> 4 & 0x0f;
- dma = config & 0x0f;
- if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
- IRDA_DEBUG(0, __FUNCTION__
- "(), addr 0x%04x - no device found!n", fir_base);
- return -ENODEV;
- }
- MESSAGE("SMC IrDA Controller foundn IrCC version %d.%d, "
- "firport 0x%03x, sirport 0x%03x dma=%d, irq=%dn",
- chip & 0x0f, version, fir_base, sir_base, dma, irq);
- if (dev_count>DIM(dev_self)) {
- IRDA_DEBUG(0, __FUNCTION__
- "(), to many devices!n");
- return -ENOMEM;
- }
- /*
- * Allocate new instance of the driver
- */
- self = kmalloc(sizeof(struct ircc_cb), GFP_KERNEL);
- if (self == NULL) {
- ERROR("%s, Can't allocate memory for control block!n",
- driver_name);
- return -ENOMEM;
- }
- memset(self, 0, sizeof(struct ircc_cb));
- spin_lock_init(&self->lock);
- /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
- self->rx_buff.truesize = 4000;
- self->tx_buff.truesize = 4000;
- self->rx_buff.head = (u8 *) kmalloc(self->rx_buff.truesize,
- GFP_KERNEL|GFP_DMA);
- if (self->rx_buff.head == NULL) {
- ERROR("%s, Can't allocate memory for receive buffer!n",
- driver_name);
- kfree(self);
- return -ENOMEM;
- }
- self->tx_buff.head = (u8 *) kmalloc(self->tx_buff.truesize,
- GFP_KERNEL|GFP_DMA);
- if (self->tx_buff.head == NULL) {
- ERROR("%s, Can't allocate memory for transmit buffer!n",
- driver_name);
- kfree(self->rx_buff.head);
- kfree(self);
- return -ENOMEM;
- }
- irport = irport_open(dev_count, sir_base, irq);
- if (!irport) {
- kfree(self->tx_buff.head);
- kfree(self->rx_buff.head);
- kfree(self);
- return -ENODEV;
- }
- memset(self->rx_buff.head, 0, self->rx_buff.truesize);
- memset(self->tx_buff.head, 0, self->tx_buff.truesize);
-
- /* Need to store self somewhere */
- dev_self[dev_count++] = self;
- /* Steal the network device from irport */
- self->netdev = irport->netdev;
- self->irport = irport;
- irport->priv = self;
- /* Initialize IO */
- self->io = &irport->io;
- self->io->fir_base = fir_base;
- self->io->sir_base = sir_base; /* Used by irport */
- self->io->fir_ext = CHIP_IO_EXTENT;
- self->io->sir_ext = 8; /* Used by irport */
- if (ircc_irq < 255) {
- if (ircc_irq!=irq)
- MESSAGE("%s, Overriding IRQ - chip says %d, using %dn",
- driver_name, self->io->irq, ircc_irq);
- self->io->irq = ircc_irq;
- }
- else
- self->io->irq = irq;
- if (ircc_dma < 255) {
- if (ircc_dma!=dma)
- MESSAGE("%s, Overriding DMA - chip says %d, using %dn",
- driver_name, self->io->dma, ircc_dma);
- self->io->dma = ircc_dma;
- }
- else
- self->io->dma = dma;
- request_region(fir_base, CHIP_IO_EXTENT, driver_name);
- /* Initialize QoS for this device */
- irda_init_max_qos_capabilies(&irport->qos);
-
- /* The only value we must override it the baudrate */
- irport->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
- IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
- irport->qos.min_turn_time.bits = 0x07;
- irport->qos.window_size.bits = 0x01;
- irda_qos_bits_to_value(&irport->qos);
- irport->flags = IFF_FIR|IFF_MIR|IFF_SIR|IFF_DMA|IFF_PIO;
-
- self->rx_buff.in_frame = FALSE;
- self->rx_buff.state = OUTSIDE_FRAME;
- self->tx_buff.data = self->tx_buff.head;
- self->rx_buff.data = self->rx_buff.head;
-
- /* Override the speed change function, since we must control it now */
- irport->change_speed = &ircc_change_speed;
- irport->interrupt = &ircc_interrupt;
- self->netdev->open = &ircc_net_open;
- self->netdev->stop = &ircc_net_close;
- irport_start(self->irport);
- self->pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, ircc_pmproc);
- if (self->pmdev)
- self->pmdev->data = self;
- /* Power on device */
- outb(0x00, fir_base+IRCC_MASTER);
- return 0;
- }
- /*
- * Function ircc_change_speed (self, baud)
- *
- * Change the speed of the device
- *
- */
- static void ircc_change_speed(void *priv, u32 speed)
- {
- int iobase, ir_mode, ctrl, fast;
- struct ircc_cb *self = (struct ircc_cb *) priv;
- struct net_device *dev;
- IRDA_DEBUG(0, __FUNCTION__ "n");
- ASSERT(self != NULL, return;);
- dev = self->netdev;
- iobase = self->io->fir_base;
- /* Update accounting for new speed */
- self->io->speed = speed;
- outb(IRCC_MASTER_RESET, iobase+IRCC_MASTER);
- outb(0x00, iobase+IRCC_MASTER);
- switch (speed) {
- default:
- IRDA_DEBUG(0, __FUNCTION__ "(), unknown baud rate of %dn",
- speed);
- /* FALLTHROUGH */
- case 9600:
- case 19200:
- case 38400:
- case 57600:
- case 115200:
- ir_mode = IRCC_CFGA_IRDA_SIR_A;
- ctrl = 0;
- fast = 0;
- break;
- case 576000:
- ir_mode = IRCC_CFGA_IRDA_HDLC;
- ctrl = IRCC_CRC;
- fast = 0;
- IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 576000n");
- break;
- case 1152000:
- ir_mode = IRCC_CFGA_IRDA_HDLC;
- ctrl = IRCC_1152 | IRCC_CRC;
- fast = 0;
- IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 1152000n");
- break;
- case 4000000:
- ir_mode = IRCC_CFGA_IRDA_4PPM;
- ctrl = IRCC_CRC;
- fast = IRCC_LCR_A_FAST;
- IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 4000000n");
- break;
- }
-
- register_bank(iobase, 0);
- outb(0, iobase+IRCC_IER);
- outb(IRCC_MASTER_INT_EN, iobase+IRCC_MASTER);
- /* Make special FIR init if necessary */
- if (speed > 115200) {
- irport_stop(self->irport);
- /* Install FIR transmit handler */
- dev->hard_start_xmit = &ircc_hard_xmit;
- /*
- * Don't know why we have to do this, but FIR interrupts
- * stops working if we remove it.
- */
- /* outb(UART_MCR_OUT2, self->io->sir_base + UART_MCR); */
- /* Be ready for incoming frames */
- ircc_dma_receive(self, iobase);
- } else {
- /* Install SIR transmit handler */
- dev->hard_start_xmit = &irport_hard_xmit;
- irport_start(self->irport);
-
- IRDA_DEBUG(0, __FUNCTION__
- "(), using irport to change speed to %dn", speed);
- irport_change_speed(self->irport, speed);
- }
- register_bank(iobase, 1);
- outb(((inb(iobase+IRCC_SCE_CFGA) & 0x87) | ir_mode),
- iobase+IRCC_SCE_CFGA);
- #ifdef SMC_669 /* Uses pin 88/89 for Rx/Tx */
- outb(((inb(iobase+IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
- iobase+IRCC_SCE_CFGB);
- #else
- outb(((inb(iobase+IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
- iobase+IRCC_SCE_CFGB);
- #endif
- (void) inb(iobase+IRCC_FIFO_THRESHOLD);
- outb(64, iobase+IRCC_FIFO_THRESHOLD);
-
- register_bank(iobase, 4);
- outb((inb(iobase+IRCC_CONTROL) & 0x30) | ctrl, iobase+IRCC_CONTROL);
-
- register_bank(iobase, 0);
- outb(fast, iobase+IRCC_LCR_A);
-
- netif_start_queue(dev);
- }
- /*
- * Function ircc_hard_xmit (skb, dev)
- *
- * Transmit the frame!
- *
- */
- static int ircc_hard_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct irport_cb *irport;
- struct ircc_cb *self;
- unsigned long flags;
- s32 speed;
- int iobase;
- int mtt;
- irport = (struct irport_cb *) dev->priv;
- self = (struct ircc_cb *) irport->priv;
- ASSERT(self != NULL, return 0;);
- iobase = self->io->fir_base;
- netif_stop_queue(dev);
- /* Check if we need to change the speed after this frame */
- speed = irda_get_next_speed(skb);
- if ((speed != self->io->speed) && (speed != -1)) {
- /* Check for empty frame */
- if (!skb->len) {
- ircc_change_speed(self, speed);
- dev_kfree_skb(skb);
- return 0;
- } else
- self->new_speed = speed;
- }
-
- spin_lock_irqsave(&self->lock, flags);
- memcpy(self->tx_buff.head, skb->data, skb->len);
- self->tx_buff.len = skb->len;
- self->tx_buff.data = self->tx_buff.head;
-
- mtt = irda_get_mtt(skb);
- if (mtt) {
- int bofs;
- /*
- * Compute how many BOFs (STA or PA's) we need to waste the
- * min turn time given the speed of the link.
- */
- bofs = mtt * (self->io->speed / 1000) / 8000;
- if (bofs > 4095)
- bofs = 4095;
- ircc_dma_xmit(self, iobase, bofs);
- } else {
- /* Transmit frame */
- ircc_dma_xmit(self, iobase, 0);
- }
- spin_unlock_irqrestore(&self->lock, flags);
- dev_kfree_skb(skb);
- return 0;
- }
- /*
- * Function ircc_dma_xmit (self, iobase)
- *
- * Transmit data using DMA
- *
- */
- static void ircc_dma_xmit(struct ircc_cb *self, int iobase, int bofs)
- {
- u8 ctrl;
- IRDA_DEBUG(2, __FUNCTION__ "n");
- #if 0
- /* Disable Rx */
- register_bank(iobase, 0);
- outb(0x00, iobase+IRCC_LCR_B);
- #endif
- register_bank(iobase, 1);
- outb(inb(iobase+IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
- iobase+IRCC_SCE_CFGB);
- self->io->direction = IO_XMIT;
- /* Set BOF additional count for generating the min turn time */
- register_bank(iobase, 4);
- outb(bofs & 0xff, iobase+IRCC_BOF_COUNT_LO);
- ctrl = inb(iobase+IRCC_CONTROL) & 0xf0;
- outb(ctrl | ((bofs >> 8) & 0x0f), iobase+IRCC_BOF_COUNT_HI);
- /* Set max Tx frame size */
- outb(self->tx_buff.len >> 8, iobase+IRCC_TX_SIZE_HI);
- outb(self->tx_buff.len & 0xff, iobase+IRCC_TX_SIZE_LO);
- /* Setup DMA controller (must be done after enabling chip DMA) */
- setup_dma(self->io->dma, self->tx_buff.data, self->tx_buff.len,
- DMA_TX_MODE);
- outb(UART_MCR_OUT2, self->io->sir_base + UART_MCR);
- /* Enable burst mode chip Tx DMA */
- register_bank(iobase, 1);
- outb(inb(iobase+IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
- IRCC_CFGB_DMA_BURST, iobase+IRCC_SCE_CFGB);
- /* Enable interrupt */
- outb(IRCC_MASTER_INT_EN, iobase+IRCC_MASTER);
- register_bank(iobase, 0);
- outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase+IRCC_IER);
- /* Enable transmit */
- outb(IRCC_LCR_B_SCE_TRANSMIT|IRCC_LCR_B_SIP_ENABLE, iobase+IRCC_LCR_B);
- }
- /*
- * Function ircc_dma_xmit_complete (self)
- *
- * The transfer of a frame in finished. This function will only be called
- * by the interrupt handler
- *
- */
- static void ircc_dma_xmit_complete(struct ircc_cb *self, int iobase)
- {
- IRDA_DEBUG(2, __FUNCTION__ "n");
- #if 0
- /* Disable Tx */
- register_bank(iobase, 0);
- outb(0x00, iobase+IRCC_LCR_B);
- #endif
- register_bank(self->io->fir_base, 1);
- outb(inb(self->io->fir_base+IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
- self->io->fir_base+IRCC_SCE_CFGB);
- /* Check for underrrun! */
- register_bank(iobase, 0);
- if (inb(iobase+IRCC_LSR) & IRCC_LSR_UNDERRUN) {
- self->irport->stats.tx_errors++;
- self->irport->stats.tx_fifo_errors++;
- /* Reset error condition */
- register_bank(iobase, 0);
- outb(IRCC_MASTER_ERROR_RESET, iobase+IRCC_MASTER);
- outb(0x00, iobase+IRCC_MASTER);
- } else {
- self->irport->stats.tx_packets++;
- self->irport->stats.tx_bytes += self->tx_buff.len;
- }
- /* Check if it's time to change the speed */
- if (self->new_speed) {
- ircc_change_speed(self, self->new_speed);
- self->new_speed = 0;
- }
- netif_wake_queue(self->netdev);
- }
- /*
- * Function ircc_dma_receive (self)
- *
- * Get ready for receiving a frame. The device will initiate a DMA
- * if it starts to receive a frame.
- *
- */
- static int ircc_dma_receive(struct ircc_cb *self, int iobase)
- {
- #if 0
- /* Turn off chip DMA */
- register_bank(iobase, 1);
- outb(inb(iobase+IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
- iobase+IRCC_SCE_CFGB);
- #endif
- setup_dma(self->io->dma, self->rx_buff.data, self->rx_buff.truesize,
- DMA_RX_MODE);
- /* Set max Rx frame size */
- register_bank(iobase, 4);
- outb((2050 >> 8) & 0x0f, iobase+IRCC_RX_SIZE_HI);
- outb(2050 & 0xff, iobase+IRCC_RX_SIZE_LO);
- self->io->direction = IO_RECV;
- self->rx_buff.data = self->rx_buff.head;
- /* Setup DMA controller */
-
- /* Enable receiver */
- register_bank(iobase, 0);
- outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
- iobase+IRCC_LCR_B);
-
- /* Enable burst mode chip Rx DMA */
- register_bank(iobase, 1);
- outb(inb(iobase+IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
- IRCC_CFGB_DMA_BURST, iobase+IRCC_SCE_CFGB);
- return 0;
- }
- /*
- * Function ircc_dma_receive_complete (self)
- *
- * Finished with receiving frames
- *
- */
- static void ircc_dma_receive_complete(struct ircc_cb *self, int iobase)
- {
- struct sk_buff *skb;
- int len, msgcnt;
- IRDA_DEBUG(2, __FUNCTION__ "n");
- #if 0
- /* Disable Rx */
- register_bank(iobase, 0);
- outb(0x00, iobase+IRCC_LCR_B);
- #endif
- register_bank(iobase, 0);
- msgcnt = inb(iobase+IRCC_LCR_B) & 0x08;
- IRDA_DEBUG(2, __FUNCTION__ ": dma count = %dn",
- get_dma_residue(self->io->dma));
- len = self->rx_buff.truesize - get_dma_residue(self->io->dma);
-
- /* Remove CRC */
- if (self->io->speed < 4000000)
- len -= 2;
- else
- len -= 4;
- if ((len < 2) || (len > 2050)) {
- WARNING(__FUNCTION__ "(), bogus len=%dn", len);
- return;
- }
- IRDA_DEBUG(2, __FUNCTION__ ": msgcnt = %d, len=%dn", msgcnt, len);
- skb = dev_alloc_skb(len+1);
- if (!skb) {
- WARNING(__FUNCTION__ "(), memory squeeze, dropping frame.n");
- return;
- }
- /* Make sure IP header gets aligned */
- skb_reserve(skb, 1);
- memcpy(skb_put(skb, len), self->rx_buff.data, len);
- self->irport->stats.rx_packets++;
- self->irport->stats.rx_bytes += len;
- skb->dev = self->netdev;
- skb->mac.raw = skb->data;
- skb->protocol = htons(ETH_P_IRDA);
- netif_rx(skb);
- }
- /*
- * Function ircc_interrupt (irq, dev_id, regs)
- *
- * An interrupt from the chip has arrived. Time to do some work
- *
- */
- static void ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- struct irport_cb *irport;
- struct ircc_cb *self;
- int iobase, iir;
- if (dev == NULL) {
- printk(KERN_WARNING "%s: irq %d for unknown device.n",
- driver_name, irq);
- return;
- }
- irport = (struct irport_cb *) dev->priv;
- ASSERT(irport != NULL, return;);
- self = (struct ircc_cb *) irport->priv;
- ASSERT(self != NULL, return;);
- /* Check if we should use the SIR interrupt handler */
- if (self->io->speed < 576000) {
- irport_interrupt(irq, dev_id, regs);
- return;
- }
- iobase = self->io->fir_base;
- spin_lock(&self->lock);
- register_bank(iobase, 0);
- iir = inb(iobase+IRCC_IIR);
- /* Disable interrupts */
- outb(0, iobase+IRCC_IER);
- IRDA_DEBUG(2, __FUNCTION__ "(), iir = 0x%02xn", iir);
- if (iir & IRCC_IIR_EOM) {
- if (self->io->direction == IO_RECV)
- ircc_dma_receive_complete(self, iobase);
- else
- ircc_dma_xmit_complete(self, iobase);
-
- ircc_dma_receive(self, iobase);
- }
- /* Enable interrupts again */
- register_bank(iobase, 0);
- outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, iobase+IRCC_IER);
- spin_unlock(&self->lock);
- }
- #if 0 /* unused */
- /*
- * Function ircc_is_receiving (self)
- *
- * Return TRUE is we are currently receiving a frame
- *
- */
- static int ircc_is_receiving(struct ircc_cb *self)
- {
- int status = FALSE;
- /* int iobase; */
- IRDA_DEBUG(0, __FUNCTION__ "n");
- ASSERT(self != NULL, return FALSE;);
- IRDA_DEBUG(0, __FUNCTION__ ": dma count = %dn",
- get_dma_residue(self->io->dma));
- status = (self->rx_buff.state != OUTSIDE_FRAME);
-
- return status;
- }
- #endif /* unused */
- /*
- * Function ircc_net_open (dev)
- *
- * Start the device
- *
- */
- static int ircc_net_open(struct net_device *dev)
- {
- struct irport_cb *irport;
- struct ircc_cb *self;
- int iobase;
- IRDA_DEBUG(0, __FUNCTION__ "n");
-
- ASSERT(dev != NULL, return -1;);
- irport = (struct irport_cb *) dev->priv;
- self = (struct ircc_cb *) irport->priv;
- ASSERT(self != NULL, return 0;);
-
- iobase = self->io->fir_base;
- irport_net_open(dev); /* irport allocates the irq */
- /*
- * Always allocate the DMA channel after the IRQ,
- * and clean up on failure.
- */
- if (request_dma(self->io->dma, dev->name)) {
- irport_net_close(dev);
- WARNING(__FUNCTION__ "(), unable to allocate DMA=%dn", self->io->dma);
- return -EAGAIN;
- }
-
- MOD_INC_USE_COUNT;
- return 0;
- }
- /*
- * Function ircc_net_close (dev)
- *
- * Stop the device
- *
- */
- static int ircc_net_close(struct net_device *dev)
- {
- struct irport_cb *irport;
- struct ircc_cb *self;
- int iobase;
- IRDA_DEBUG(0, __FUNCTION__ "n");
-
- ASSERT(dev != NULL, return -1;);
- irport = (struct irport_cb *) dev->priv;
- self = (struct ircc_cb *) irport->priv;
-
- ASSERT(self != NULL, return 0;);
-
- iobase = self->io->fir_base;
- irport_net_close(dev);
- disable_dma(self->io->dma);
- free_dma(self->io->dma);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static void ircc_suspend(struct ircc_cb *self)
- {
- MESSAGE("%s, Suspendingn", driver_name);
- if (self->io->suspended)
- return;
- ircc_net_close(self->netdev);
- self->io->suspended = 1;
- }
- static void ircc_wakeup(struct ircc_cb *self)
- {
- unsigned long flags;
- if (!self->io->suspended)
- return;
- save_flags(flags);
- cli();
- ircc_net_open(self->netdev);
-
- restore_flags(flags);
- MESSAGE("%s, Waking upn", driver_name);
- }
- static int ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data)
- {
- struct ircc_cb *self = (struct ircc_cb*) dev->data;
- if (self) {
- switch (rqst) {
- case PM_SUSPEND:
- ircc_suspend(self);
- break;
- case PM_RESUME:
- ircc_wakeup(self);
- break;
- }
- }
- return 0;
- }
- #ifdef MODULE
- /*
- * Function ircc_close (self)
- *
- * Close driver instance
- *
- */
- #ifdef MODULE
- static int __exit ircc_close(struct ircc_cb *self)
- {
- int iobase;
- IRDA_DEBUG(0, __FUNCTION__ "n");
- ASSERT(self != NULL, return -1;);
- iobase = self->irport->io.fir_base;
- irport_close(self->irport);
- /* Stop interrupts */
- register_bank(iobase, 0);
- outb(0, iobase+IRCC_IER);
- outb(IRCC_MASTER_RESET, iobase+IRCC_MASTER);
- outb(0x00, iobase+IRCC_MASTER);
- #if 0
- /* Reset to SIR mode */
- register_bank(iobase, 1);
- outb(IRCC_CFGA_IRDA_SIR_A|IRCC_CFGA_TX_POLARITY, iobase+IRCC_SCE_CFGA);
- outb(IRCC_CFGB_IR, iobase+IRCC_SCE_CFGB);
- #endif
- /* Release the PORT that this driver is using */
- IRDA_DEBUG(0, __FUNCTION__ "(), releasing 0x%03xn",
- self->io->fir_base);
- release_region(self->io->fir_base, self->io->fir_ext);
- if (self->tx_buff.head)
- kfree(self->tx_buff.head);
-
- if (self->rx_buff.head)
- kfree(self->rx_buff.head);
- kfree(self);
- return 0;
- }
- #endif /* MODULE */
- int __init smc_init(void)
- {
- return ircc_init();
- }
- void __exit smc_cleanup(void)
- {
- int i;
- IRDA_DEBUG(0, __FUNCTION__ "n");
- for (i=0; i < 2; i++) {
- if (dev_self[i])
- ircc_close(dev_self[i]);
- }
- }
- module_init(smc_init);
- module_exit(smc_cleanup);
-
- MODULE_AUTHOR("Thomas Davis <tadavis@jps.net>");
- MODULE_DESCRIPTION("SMC IrCC controller driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(ircc_dma, "1i");
- MODULE_PARM_DESC(ircc_dma, "DMA channel");
- MODULE_PARM(ircc_irq, "1i");
- MODULE_PARM_DESC(ircc_irq, "IRQ line");
- MODULE_PARM(ircc_fir, "1-4i");
- MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
- MODULE_PARM(ircc_sir, "1-4i");
- MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
- MODULE_PARM(ircc_cfg, "1-4i");
- MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
- #endif /* MODULE */