sb1000.c
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上传日期:2013-02-24
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- /* sb1000.c: A General Instruments SB1000 driver for linux. */
- /*
- Written 1998 by Franco Venturi.
- Copyright 1998 by Franco Venturi.
- Copyright 1994,1995 by Donald Becker.
- Copyright 1993 United States Government as represented by the
- Director, National Security Agency.
- This driver is for the General Instruments SB1000 (internal SURFboard)
- The author may be reached as fventuri@mediaone.net
- 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.
- Changes:
- 981115 Steven Hirsch <shirsch@adelphia.net>
- Linus changed the timer interface. Should work on all recent
- development kernels.
- 980608 Steven Hirsch <shirsch@adelphia.net>
- Small changes to make it work with 2.1.x kernels. Hopefully,
- nothing major will change before official release of Linux 2.2.
-
- Merged with 2.2 - Alan Cox
- */
- static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)n";
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/string.h>
- #include <linux/interrupt.h>
- #include <linux/ptrace.h>
- #include <linux/errno.h>
- #include <linux/in.h>
- #include <linux/slab.h>
- #include <linux/ioport.h>
- #include <linux/netdevice.h>
- #include <linux/if_arp.h>
- #include <linux/skbuff.h>
- #include <linux/delay.h> /* for udelay() */
- #include <asm/processor.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/uaccess.h>
- #include <linux/etherdevice.h>
- #include <linux/isapnp.h>
- /* for SIOGCM/SIOSCM stuff */
- #include <linux/if_cablemodem.h>
- #ifdef SB1000_DEBUG
- int sb1000_debug = SB1000_DEBUG;
- #else
- int sb1000_debug = 1;
- #endif
- static const int SB1000_IO_EXTENT = 8;
- /* SB1000 Maximum Receive Unit */
- static const int SB1000_MRU = 1500; /* octects */
- #define NPIDS 4
- struct sb1000_private {
- struct sk_buff *rx_skb[NPIDS];
- short rx_dlen[NPIDS];
- unsigned int rx_frames;
- short rx_error_count;
- short rx_error_dpc_count;
- unsigned char rx_session_id[NPIDS];
- unsigned char rx_frame_id[NPIDS];
- unsigned char rx_pkt_type[NPIDS];
- struct net_device_stats stats;
- };
- /* prototypes for Linux interface */
- extern int sb1000_probe(struct net_device *dev);
- static int sb1000_open(struct net_device *dev);
- static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
- static int sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev);
- static void sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static struct net_device_stats *sb1000_stats(struct net_device *dev);
- static int sb1000_close(struct net_device *dev);
- /* SB1000 hardware routines to be used during open/configuration phases */
- static inline void nicedelay(unsigned long usecs);
- static inline int card_wait_for_busy_clear(const int ioaddr[],
- const char* name);
- static inline int card_wait_for_ready(const int ioaddr[], const char* name,
- unsigned char in[]);
- static inline int card_send_command(const int ioaddr[], const char* name,
- const unsigned char out[], unsigned char in[]);
- /* SB1000 hardware routines to be used during frame rx interrupt */
- static inline int sb1000_wait_for_ready(const int ioaddr[], const char* name);
- static inline int sb1000_wait_for_ready_clear(const int ioaddr[],
- const char* name);
- static inline void sb1000_send_command(const int ioaddr[], const char* name,
- const unsigned char out[]);
- static inline void sb1000_read_status(const int ioaddr[], unsigned char in[]);
- static inline void sb1000_issue_read_command(const int ioaddr[],
- const char* name);
- /* SB1000 commands for open/configuration */
- static inline int sb1000_reset(const int ioaddr[], const char* name);
- static inline int sb1000_check_CRC(const int ioaddr[], const char* name);
- static inline int sb1000_start_get_set_command(const int ioaddr[],
- const char* name);
- static inline int sb1000_end_get_set_command(const int ioaddr[],
- const char* name);
- static inline int sb1000_activate(const int ioaddr[], const char* name);
- static inline int sb1000_get_firmware_version(const int ioaddr[],
- const char* name, unsigned char version[], int do_end);
- static inline int sb1000_get_frequency(const int ioaddr[], const char* name,
- int* frequency);
- static inline int sb1000_set_frequency(const int ioaddr[], const char* name,
- int frequency);
- static inline int sb1000_get_PIDs(const int ioaddr[], const char* name,
- short PID[]);
- static inline int sb1000_set_PIDs(const int ioaddr[], const char* name,
- const short PID[]);
- /* SB1000 commands for frame rx interrupt */
- static inline int sb1000_rx(struct net_device *dev);
- static inline void sb1000_error_dpc(struct net_device *dev);
- static struct isapnp_device_id id_table[] = {
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
- ISAPNP_VENDOR('G','I','C'), ISAPNP_FUNCTION(0x1000), 0 },
- {0}
- };
- MODULE_DEVICE_TABLE(isapnp, id_table);
- /* probe for SB1000 using Plug-n-Play mechanism */
- int
- sb1000_probe(struct net_device *dev)
- {
- unsigned short ioaddr[2], irq;
- struct pci_dev *idev=NULL;
- unsigned int serial_number;
-
- while(1)
- {
- /*
- * Find the card
- */
-
- idev=isapnp_find_dev(NULL, ISAPNP_VENDOR('G','I','C'),
- ISAPNP_FUNCTION(0x1000), idev);
-
- /*
- * No card
- */
-
- if(idev==NULL)
- return -ENODEV;
-
- /*
- * Bring it online
- */
-
- idev->prepare(idev);
- idev->activate(idev);
-
- /*
- * Ports free ?
- */
-
- if(!idev->resource[0].start || check_region(idev->resource[0].start, 16))
- continue;
- if(!idev->resource[1].start || check_region(idev->resource[1].start, 16))
- continue;
-
- serial_number = idev->bus->serial;
-
- ioaddr[0]=idev->resource[0].start;
- ioaddr[1]=idev->resource[1].start;
-
- irq = idev->irq_resource[0].start;
- /* check I/O base and IRQ */
- if (dev->base_addr != 0 && dev->base_addr != ioaddr[0])
- continue;
- if (dev->rmem_end != 0 && dev->rmem_end != ioaddr[1])
- continue;
- if (dev->irq != 0 && dev->irq != irq)
- continue;
-
- /*
- * Ok set it up.
- */
-
-
- dev->base_addr = ioaddr[0];
- /* rmem_end holds the second I/O address - fv */
- dev->rmem_end = ioaddr[1];
- dev->irq = irq;
- if (sb1000_debug > 0)
- printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
- "S/N %#8.8x, IRQ %d.n", dev->name, dev->base_addr,
- dev->rmem_end, serial_number, dev->irq);
- dev = init_etherdev(dev, 0);
- if (!dev)
- return -ENOMEM;
- SET_MODULE_OWNER(dev);
- /* Make up a SB1000-specific-data structure. */
- dev->priv = kmalloc(sizeof(struct sb1000_private), GFP_KERNEL);
- if (dev->priv == NULL)
- return -ENOMEM;
- memset(dev->priv, 0, sizeof(struct sb1000_private));
- if (sb1000_debug > 0)
- printk(KERN_NOTICE "%s", version);
- /* The SB1000-specific entries in the device structure. */
- dev->open = sb1000_open;
- dev->do_ioctl = sb1000_dev_ioctl;
- dev->hard_start_xmit = sb1000_start_xmit;
- dev->stop = sb1000_close;
- dev->get_stats = sb1000_stats;
- /* Fill in the generic fields of the device structure. */
- dev->change_mtu = NULL;
- dev->hard_header = NULL;
- dev->rebuild_header = NULL;
- dev->set_mac_address = NULL;
- dev->header_cache_update= NULL;
- dev->type = ARPHRD_ETHER;
- dev->hard_header_len = 0;
- dev->mtu = 1500;
- dev->addr_len = ETH_ALEN;
- /* hardware address is 0:0:serial_number */
- dev->dev_addr[0] = 0;
- dev->dev_addr[1] = 0;
- dev->dev_addr[2] = serial_number >> 24 & 0xff;
- dev->dev_addr[3] = serial_number >> 16 & 0xff;
- dev->dev_addr[4] = serial_number >> 8 & 0xff;
- dev->dev_addr[5] = serial_number >> 0 & 0xff;
- dev->tx_queue_len = 0;
-
- /* New-style flags. */
- dev->flags = IFF_POINTOPOINT|IFF_NOARP;
- /* Lock resources */
- request_region(ioaddr[0], 16, dev->name);
- request_region(ioaddr[1], 16, dev->name);
- return 0;
- }
- }
- /*
- * SB1000 hardware routines to be used during open/configuration phases
- */
- const int TimeOutJiffies = (int)(8.75 * HZ);
- static inline void nicedelay(unsigned long usecs)
- {
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(HZ);
- return;
- }
- /* Card Wait For Busy Clear (cannot be used during an interrupt) */
- static inline int
- card_wait_for_busy_clear(const int ioaddr[], const char* name)
- {
- unsigned char a;
- unsigned long timeout;
- a = inb(ioaddr[0] + 7);
- timeout = jiffies + TimeOutJiffies;
- while (a & 0x80 || a & 0x40) {
- /* a little sleep */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(0);
- a = inb(ioaddr[0] + 7);
- if (jiffies >= timeout) {
- printk(KERN_WARNING "%s: card_wait_for_busy_clear timeoutn",
- name);
- return -ETIME;
- }
- }
- return 0;
- }
- /* Card Wait For Ready (cannot be used during an interrupt) */
- static inline int
- card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
- {
- unsigned char a;
- unsigned long timeout;
- a = inb(ioaddr[1] + 6);
- timeout = jiffies + TimeOutJiffies;
- while (a & 0x80 || !(a & 0x40)) {
- /* a little sleep */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(0);
- a = inb(ioaddr[1] + 6);
- if (jiffies >= timeout) {
- printk(KERN_WARNING "%s: card_wait_for_ready timeoutn",
- name);
- return -ETIME;
- }
- }
- in[1] = inb(ioaddr[0] + 1);
- in[2] = inb(ioaddr[0] + 2);
- in[3] = inb(ioaddr[0] + 3);
- in[4] = inb(ioaddr[0] + 4);
- in[0] = inb(ioaddr[0] + 5);
- in[6] = inb(ioaddr[0] + 6);
- in[5] = inb(ioaddr[1] + 6);
- return 0;
- }
- /* Card Send Command (cannot be used during an interrupt) */
- static inline int
- card_send_command(const int ioaddr[], const char* name,
- const unsigned char out[], unsigned char in[])
- {
- int status, x;
- if ((status = card_wait_for_busy_clear(ioaddr, name)))
- return status;
- outb(0xa0, ioaddr[0] + 6);
- outb(out[2], ioaddr[0] + 1);
- outb(out[3], ioaddr[0] + 2);
- outb(out[4], ioaddr[0] + 3);
- outb(out[5], ioaddr[0] + 4);
- outb(out[1], ioaddr[0] + 5);
- outb(0xa0, ioaddr[0] + 6);
- outb(out[0], ioaddr[0] + 7);
- if (out[0] != 0x20 && out[0] != 0x30) {
- if ((status = card_wait_for_ready(ioaddr, name, in)))
- return status;
- inb(ioaddr[0] + 7);
- if (sb1000_debug > 3)
- printk(KERN_DEBUG "%s: card_send_command "
- "out: %02x%02x%02x%02x%02x%02x "
- "in: %02x%02x%02x%02x%02x%02x%02xn", name,
- out[0], out[1], out[2], out[3], out[4], out[5],
- in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
- } else {
- if (sb1000_debug > 3)
- printk(KERN_DEBUG "%s: card_send_command "
- "out: %02x%02x%02x%02x%02x%02xn", name,
- out[0], out[1], out[2], out[3], out[4], out[5]);
- }
- if (out[1] == 0x1b) {
- x = (out[2] == 0x02);
- } else {
- if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
- return -EIO;
- }
- return 0;
- }
- /*
- * SB1000 hardware routines to be used during frame rx interrupt
- */
- const int Sb1000TimeOutJiffies = 7 * HZ;
- /* Card Wait For Ready (to be used during frame rx) */
- static inline int
- sb1000_wait_for_ready(const int ioaddr[], const char* name)
- {
- unsigned long timeout;
- timeout = jiffies + Sb1000TimeOutJiffies;
- while (inb(ioaddr[1] + 6) & 0x80) {
- if (jiffies >= timeout) {
- printk(KERN_WARNING "%s: sb1000_wait_for_ready timeoutn",
- name);
- return -ETIME;
- }
- }
- timeout = jiffies + Sb1000TimeOutJiffies;
- while (!(inb(ioaddr[1] + 6) & 0x40)) {
- if (jiffies >= timeout) {
- printk(KERN_WARNING "%s: sb1000_wait_for_ready timeoutn",
- name);
- return -ETIME;
- }
- }
- inb(ioaddr[0] + 7);
- return 0;
- }
- /* Card Wait For Ready Clear (to be used during frame rx) */
- static inline int
- sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
- {
- unsigned long timeout;
- timeout = jiffies + Sb1000TimeOutJiffies;
- while (inb(ioaddr[1] + 6) & 0x80) {
- if (jiffies >= timeout) {
- printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeoutn",
- name);
- return -ETIME;
- }
- }
- timeout = jiffies + Sb1000TimeOutJiffies;
- while (inb(ioaddr[1] + 6) & 0x40) {
- if (jiffies >= timeout) {
- printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeoutn",
- name);
- return -ETIME;
- }
- }
- return 0;
- }
- /* Card Send Command (to be used during frame rx) */
- static inline void
- sb1000_send_command(const int ioaddr[], const char* name,
- const unsigned char out[])
- {
- outb(out[2], ioaddr[0] + 1);
- outb(out[3], ioaddr[0] + 2);
- outb(out[4], ioaddr[0] + 3);
- outb(out[5], ioaddr[0] + 4);
- outb(out[1], ioaddr[0] + 5);
- outb(out[0], ioaddr[0] + 7);
- if (sb1000_debug > 3)
- printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
- "%02x%02xn", name, out[0], out[1], out[2], out[3], out[4], out[5]);
- return;
- }
- /* Card Read Status (to be used during frame rx) */
- static inline void
- sb1000_read_status(const int ioaddr[], unsigned char in[])
- {
- in[1] = inb(ioaddr[0] + 1);
- in[2] = inb(ioaddr[0] + 2);
- in[3] = inb(ioaddr[0] + 3);
- in[4] = inb(ioaddr[0] + 4);
- in[0] = inb(ioaddr[0] + 5);
- return;
- }
- /* Issue Read Command (to be used during frame rx) */
- static inline void
- sb1000_issue_read_command(const int ioaddr[], const char* name)
- {
- const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
- sb1000_wait_for_ready_clear(ioaddr, name);
- outb(0xa0, ioaddr[0] + 6);
- sb1000_send_command(ioaddr, name, Command0);
- return;
- }
- /*
- * SB1000 commands for open/configuration
- */
- /* reset SB1000 card */
- static inline int
- sb1000_reset(const int ioaddr[], const char* name)
- {
- unsigned char st[7];
- int port, status;
- const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
- port = ioaddr[1] + 6;
- outb(0x4, port);
- inb(port);
- udelay(1000);
- outb(0x0, port);
- inb(port);
- nicedelay(60000);
- outb(0x4, port);
- inb(port);
- udelay(1000);
- outb(0x0, port);
- inb(port);
- udelay(0);
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- if (st[3] != 0xf0)
- return -EIO;
- return 0;
- }
- /* check SB1000 firmware CRC */
- static inline int
- sb1000_check_CRC(const int ioaddr[], const char* name)
- {
- unsigned char st[7];
- int crc, status;
- const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
- /* check CRC */
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- if (st[1] != st[3] || st[2] != st[4])
- return -EIO;
- crc = st[1] << 8 | st[2];
- return 0;
- }
- static inline int
- sb1000_start_get_set_command(const int ioaddr[], const char* name)
- {
- unsigned char st[7];
- const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
- return card_send_command(ioaddr, name, Command0, st);
- }
- static inline int
- sb1000_end_get_set_command(const int ioaddr[], const char* name)
- {
- unsigned char st[7];
- int status;
- const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
- const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- return card_send_command(ioaddr, name, Command1, st);
- }
- static inline int
- sb1000_activate(const int ioaddr[], const char* name)
- {
- unsigned char st[7];
- int status;
- const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
- const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
- nicedelay(50000);
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- if ((status = card_send_command(ioaddr, name, Command1, st)))
- return status;
- if (st[3] != 0xf1) {
- if ((status = sb1000_start_get_set_command(ioaddr, name)))
- return status;
- return -EIO;
- }
- udelay(1000);
- return sb1000_start_get_set_command(ioaddr, name);
- }
- /* get SB1000 firmware version */
- static inline int
- sb1000_get_firmware_version(const int ioaddr[], const char* name,
- unsigned char version[], int do_end)
- {
- unsigned char st[7];
- int status;
- const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
- if ((status = sb1000_start_get_set_command(ioaddr, name)))
- return status;
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- if (st[0] != 0xa3)
- return -EIO;
- version[0] = st[1];
- version[1] = st[2];
- if (do_end)
- return sb1000_end_get_set_command(ioaddr, name);
- else
- return 0;
- }
- /* get SB1000 frequency */
- static inline int
- sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
- {
- unsigned char st[7];
- int status;
- const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
- udelay(1000);
- if ((status = sb1000_start_get_set_command(ioaddr, name)))
- return status;
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
- return sb1000_end_get_set_command(ioaddr, name);
- }
- /* set SB1000 frequency */
- static inline int
- sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
- {
- unsigned char st[7];
- int status;
- unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
- const int FrequencyLowerLimit = 57000;
- const int FrequencyUpperLimit = 804000;
- if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
- printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
- "[%d,%d] kHzn", name, frequency, FrequencyLowerLimit,
- FrequencyUpperLimit);
- return -EINVAL;
- }
- udelay(1000);
- if ((status = sb1000_start_get_set_command(ioaddr, name)))
- return status;
- Command0[5] = frequency & 0xff;
- frequency >>= 8;
- Command0[4] = frequency & 0xff;
- frequency >>= 8;
- Command0[3] = frequency & 0xff;
- frequency >>= 8;
- Command0[2] = frequency & 0xff;
- return card_send_command(ioaddr, name, Command0, st);
- }
- /* get SB1000 PIDs */
- static inline int
- sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
- {
- unsigned char st[7];
- int status;
- const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
- const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
- const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
- const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
- udelay(1000);
- if ((status = sb1000_start_get_set_command(ioaddr, name)))
- return status;
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- PID[0] = st[1] << 8 | st[2];
- if ((status = card_send_command(ioaddr, name, Command1, st)))
- return status;
- PID[1] = st[1] << 8 | st[2];
- if ((status = card_send_command(ioaddr, name, Command2, st)))
- return status;
- PID[2] = st[1] << 8 | st[2];
- if ((status = card_send_command(ioaddr, name, Command3, st)))
- return status;
- PID[3] = st[1] << 8 | st[2];
- return sb1000_end_get_set_command(ioaddr, name);
- }
- /* set SB1000 PIDs */
- static inline int
- sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
- {
- unsigned char st[7];
- short p;
- int status;
- unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
- unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
- unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
- unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
- const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
- udelay(1000);
- if ((status = sb1000_start_get_set_command(ioaddr, name)))
- return status;
- p = PID[0];
- Command0[3] = p & 0xff;
- p >>= 8;
- Command0[2] = p & 0xff;
- if ((status = card_send_command(ioaddr, name, Command0, st)))
- return status;
- p = PID[1];
- Command1[3] = p & 0xff;
- p >>= 8;
- Command1[2] = p & 0xff;
- if ((status = card_send_command(ioaddr, name, Command1, st)))
- return status;
- p = PID[2];
- Command2[3] = p & 0xff;
- p >>= 8;
- Command2[2] = p & 0xff;
- if ((status = card_send_command(ioaddr, name, Command2, st)))
- return status;
- p = PID[3];
- Command3[3] = p & 0xff;
- p >>= 8;
- Command3[2] = p & 0xff;
- if ((status = card_send_command(ioaddr, name, Command3, st)))
- return status;
- if ((status = card_send_command(ioaddr, name, Command4, st)))
- return status;
- return sb1000_end_get_set_command(ioaddr, name);
- }
- static inline void
- sb1000_print_status_buffer(const char* name, unsigned char st[],
- unsigned char buffer[], int size)
- {
- int i, j, k;
- printk(KERN_DEBUG "%s: status: %02x %02xn", name, st[0], st[1]);
- if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
- printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
- "to %d.%d.%d.%d:%dn", name, buffer[28] << 8 | buffer[29],
- buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
- buffer[46] << 8 | buffer[47],
- buffer[42], buffer[43], buffer[44], buffer[45],
- buffer[48] << 8 | buffer[49]);
- } else {
- for (i = 0, k = 0; i < (size + 7) / 8; i++) {
- printk(KERN_DEBUG "%s: %s", name, i ? " " : "buffer:");
- for (j = 0; j < 8 && k < size; j++, k++)
- printk(" %02x", buffer[k]);
- printk("n");
- }
- }
- return;
- }
- /*
- * SB1000 commands for frame rx interrupt
- */
- /* receive a single frame and assemble datagram
- * (this is the heart of the interrupt routine)
- */
- static inline int
- sb1000_rx(struct net_device *dev)
- {
- #define FRAMESIZE 184
- unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
- short dlen;
- int ioaddr, ns;
- unsigned int skbsize;
- struct sk_buff *skb;
- struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
- struct net_device_stats *stats = &lp->stats;
- /* SB1000 frame constants */
- const int FrameSize = FRAMESIZE;
- const int NewDatagramHeaderSkip = 8;
- const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
- const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
- const int ContDatagramHeaderSkip = 7;
- const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
- const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
- const int TrailerSize = 4;
- ioaddr = dev->base_addr;
- insw(ioaddr, (unsigned short*) st, 1);
- #ifdef XXXDEBUG
- printk("cm0: received: %02x %02xn", st[0], st[1]);
- #endif /* XXXDEBUG */
- lp->rx_frames++;
- /* decide if it is a good or bad frame */
- for (ns = 0; ns < NPIDS; ns++) {
- session_id = lp->rx_session_id[ns];
- frame_id = lp->rx_frame_id[ns];
- if (st[0] == session_id) {
- if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
- goto good_frame;
- } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
- goto skipped_frame;
- } else {
- goto bad_frame;
- }
- } else if (st[0] == (session_id | 0x40)) {
- if ((st[1] & 0xf0) == 0x30) {
- goto skipped_frame;
- } else {
- goto bad_frame;
- }
- }
- }
- goto bad_frame;
- skipped_frame:
- stats->rx_frame_errors++;
- skb = lp->rx_skb[ns];
- if (sb1000_debug > 1)
- printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
- "expecting %02x %02xn", dev->name, st[0], st[1],
- skb ? session_id : session_id | 0x40, frame_id);
- if (skb) {
- dev_kfree_skb(skb);
- skb = 0;
- }
- good_frame:
- lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
- /* new datagram */
- if (st[0] & 0x40) {
- /* get data length */
- insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
- #ifdef XXXDEBUG
- printk("cm0: IP identification: %02x%02x fragment offset: %02x%02xn", buffer[30], buffer[31], buffer[32], buffer[33]);
- #endif /* XXXDEBUG */
- if (buffer[0] != NewDatagramHeaderSkip) {
- if (sb1000_debug > 1)
- printk(KERN_WARNING "%s: new datagram header skip error: "
- "got %02x expecting %02xn", dev->name, buffer[0],
- NewDatagramHeaderSkip);
- stats->rx_length_errors++;
- insw(ioaddr, buffer, NewDatagramDataSize / 2);
- goto bad_frame_next;
- }
- dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
- buffer[NewDatagramHeaderSkip + 4]) - 17;
- if (dlen > SB1000_MRU) {
- if (sb1000_debug > 1)
- printk(KERN_WARNING "%s: datagram length (%d) greater "
- "than MRU (%d)n", dev->name, dlen, SB1000_MRU);
- stats->rx_length_errors++;
- insw(ioaddr, buffer, NewDatagramDataSize / 2);
- goto bad_frame_next;
- }
- lp->rx_dlen[ns] = dlen;
- /* compute size to allocate for datagram */
- skbsize = dlen + FrameSize;
- if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
- if (sb1000_debug > 1)
- printk(KERN_WARNING "%s: can't allocate %d bytes long "
- "skbuffn", dev->name, skbsize);
- stats->rx_dropped++;
- insw(ioaddr, buffer, NewDatagramDataSize / 2);
- goto dropped_frame;
- }
- skb->dev = dev;
- skb->mac.raw = skb->data;
- skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
- insw(ioaddr, skb_put(skb, NewDatagramDataSize),
- NewDatagramDataSize / 2);
- lp->rx_skb[ns] = skb;
- } else {
- /* continuation of previous datagram */
- insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
- if (buffer[0] != ContDatagramHeaderSkip) {
- if (sb1000_debug > 1)
- printk(KERN_WARNING "%s: cont datagram header skip error: "
- "got %02x expecting %02xn", dev->name, buffer[0],
- ContDatagramHeaderSkip);
- stats->rx_length_errors++;
- insw(ioaddr, buffer, ContDatagramDataSize / 2);
- goto bad_frame_next;
- }
- skb = lp->rx_skb[ns];
- insw(ioaddr, skb_put(skb, ContDatagramDataSize),
- ContDatagramDataSize / 2);
- dlen = lp->rx_dlen[ns];
- }
- if (skb->len < dlen + TrailerSize) {
- lp->rx_session_id[ns] &= ~0x40;
- return 0;
- }
- /* datagram completed: send to upper level */
- skb_trim(skb, dlen);
- netif_rx(skb);
- dev->last_rx = jiffies;
- stats->rx_bytes+=dlen;
- stats->rx_packets++;
- lp->rx_skb[ns] = 0;
- lp->rx_session_id[ns] |= 0x40;
- return 0;
- bad_frame:
- insw(ioaddr, buffer, FrameSize / 2);
- if (sb1000_debug > 1)
- printk(KERN_WARNING "%s: frame error: got %02x %02xn",
- dev->name, st[0], st[1]);
- stats->rx_frame_errors++;
- bad_frame_next:
- if (sb1000_debug > 2)
- sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
- dropped_frame:
- stats->rx_errors++;
- if (ns < NPIDS) {
- if ((skb = lp->rx_skb[ns])) {
- dev_kfree_skb(skb);
- lp->rx_skb[ns] = 0;
- }
- lp->rx_session_id[ns] |= 0x40;
- }
- return -1;
- }
- static inline void
- sb1000_error_dpc(struct net_device *dev)
- {
- char *name;
- unsigned char st[5];
- int ioaddr[2];
- struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
- const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
- const int ErrorDpcCounterInitialize = 200;
- ioaddr[0] = dev->base_addr;
- /* rmem_end holds the second I/O address - fv */
- ioaddr[1] = dev->rmem_end;
- name = dev->name;
- sb1000_wait_for_ready_clear(ioaddr, name);
- sb1000_send_command(ioaddr, name, Command0);
- sb1000_wait_for_ready(ioaddr, name);
- sb1000_read_status(ioaddr, st);
- if (st[1] & 0x10)
- lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
- return;
- }
- /*
- * Linux interface functions
- */
- static int
- sb1000_open(struct net_device *dev)
- {
- char *name;
- int ioaddr[2], status;
- struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
- const unsigned short FirmwareVersion[] = {0x01, 0x01};
- ioaddr[0] = dev->base_addr;
- /* rmem_end holds the second I/O address - fv */
- ioaddr[1] = dev->rmem_end;
- name = dev->name;
- request_region(ioaddr[0], SB1000_IO_EXTENT, "sb1000");
- request_region(ioaddr[1], SB1000_IO_EXTENT, "sb1000");
- /* initialize sb1000 */
- if ((status = sb1000_reset(ioaddr, name)))
- return status;
- nicedelay(200000);
- if ((status = sb1000_check_CRC(ioaddr, name)))
- return status;
- /* initialize private data before board can catch interrupts */
- lp->rx_skb[0] = NULL;
- lp->rx_skb[1] = NULL;
- lp->rx_skb[2] = NULL;
- lp->rx_skb[3] = NULL;
- lp->rx_dlen[0] = 0;
- lp->rx_dlen[1] = 0;
- lp->rx_dlen[2] = 0;
- lp->rx_dlen[3] = 0;
- lp->rx_frames = 0;
- lp->rx_error_count = 0;
- lp->rx_error_dpc_count = 0;
- lp->rx_session_id[0] = 0x50;
- lp->rx_session_id[0] = 0x48;
- lp->rx_session_id[0] = 0x44;
- lp->rx_session_id[0] = 0x42;
- lp->rx_frame_id[0] = 0;
- lp->rx_frame_id[1] = 0;
- lp->rx_frame_id[2] = 0;
- lp->rx_frame_id[3] = 0;
- if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) {
- return -EAGAIN;
- }
- if (sb1000_debug > 2)
- printk(KERN_DEBUG "%s: Opening, IRQ %dn", name, dev->irq);
- /* Activate board and check firmware version */
- udelay(1000);
- if ((status = sb1000_activate(ioaddr, name)))
- return status;
- udelay(0);
- if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
- return status;
- if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
- printk(KERN_WARNING "%s: found firmware version %x.%02x "
- "(should be %x.%02x)n", name, version[0], version[1],
- FirmwareVersion[0], FirmwareVersion[1]);
- netif_start_queue(dev);
- return 0; /* Always succeed */
- }
- static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
- {
- char* name;
- unsigned char version[2];
- short PID[4];
- int ioaddr[2], status, frequency;
- unsigned int stats[5];
- struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
- if (!(dev && dev->flags & IFF_UP))
- return -ENODEV;
- ioaddr[0] = dev->base_addr;
- /* rmem_end holds the second I/O address - fv */
- ioaddr[1] = dev->rmem_end;
- name = dev->name;
- switch (cmd) {
- case SIOCGCMSTATS: /* get statistics */
- stats[0] = lp->stats.rx_bytes;
- stats[1] = lp->rx_frames;
- stats[2] = lp->stats.rx_packets;
- stats[3] = lp->stats.rx_errors;
- stats[4] = lp->stats.rx_dropped;
- if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
- return -EFAULT;
- status = 0;
- break;
- case SIOCGCMFIRMWARE: /* get firmware version */
- if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
- return status;
- if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
- return -EFAULT;
- break;
- case SIOCGCMFREQUENCY: /* get frequency */
- if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
- return status;
- if(put_user(frequency, (int*) ifr->ifr_data))
- return -EFAULT;
- break;
- case SIOCSCMFREQUENCY: /* set frequency */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if(get_user(frequency, (int*) ifr->ifr_data))
- return -EFAULT;
- if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
- return status;
- break;
- case SIOCGCMPIDS: /* get PIDs */
- if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
- return status;
- if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
- return -EFAULT;
- break;
- case SIOCSCMPIDS: /* set PIDs */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
- return -EFAULT;
- if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
- return status;
- /* set session_id, frame_id and pkt_type too */
- lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
- lp->rx_session_id[1] = 0x48;
- lp->rx_session_id[2] = 0x44;
- lp->rx_session_id[3] = 0x42;
- lp->rx_frame_id[0] = 0;
- lp->rx_frame_id[1] = 0;
- lp->rx_frame_id[2] = 0;
- lp->rx_frame_id[3] = 0;
- break;
- default:
- status = -EINVAL;
- break;
- }
- return status;
- }
- /* transmit function: do nothing since SB1000 can't send anything out */
- static int
- sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- printk(KERN_WARNING "%s: trying to transmit!!!n", dev->name);
- /* sb1000 can't xmit datagrams */
- dev_kfree_skb(skb);
- return 0;
- }
- /* SB1000 interrupt handler. */
- static void sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- char *name;
- unsigned char st;
- int ioaddr[2];
- struct net_device *dev = (struct net_device *) dev_id;
- struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
- const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
- const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
- const int MaxRxErrorCount = 6;
- if (dev == NULL) {
- printk(KERN_ERR "sb1000_interrupt(): irq %d for unknown device.n",
- irq);
- return;
- }
- ioaddr[0] = dev->base_addr;
- /* rmem_end holds the second I/O address - fv */
- ioaddr[1] = dev->rmem_end;
- name = dev->name;
- /* is it a good interrupt? */
- st = inb(ioaddr[1] + 6);
- if (!(st & 0x08 && st & 0x20)) {
- return;
- }
- if (sb1000_debug > 3)
- printk(KERN_DEBUG "%s: entering interruptn", dev->name);
- st = inb(ioaddr[0] + 7);
- if (sb1000_rx(dev))
- lp->rx_error_count++;
- #ifdef SB1000_DELAY
- udelay(SB1000_DELAY);
- #endif /* SB1000_DELAY */
- sb1000_issue_read_command(ioaddr, name);
- if (st & 0x01) {
- sb1000_error_dpc(dev);
- sb1000_issue_read_command(ioaddr, name);
- }
- if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
- sb1000_wait_for_ready_clear(ioaddr, name);
- sb1000_send_command(ioaddr, name, Command0);
- sb1000_wait_for_ready(ioaddr, name);
- sb1000_issue_read_command(ioaddr, name);
- }
- if (lp->rx_error_count >= MaxRxErrorCount) {
- sb1000_wait_for_ready_clear(ioaddr, name);
- sb1000_send_command(ioaddr, name, Command1);
- sb1000_wait_for_ready(ioaddr, name);
- sb1000_issue_read_command(ioaddr, name);
- lp->rx_error_count = 0;
- }
- return;
- }
- static struct net_device_stats *sb1000_stats(struct net_device *dev)
- {
- struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
- return &lp->stats;
- }
- static int sb1000_close(struct net_device *dev)
- {
- int i;
- int ioaddr[2];
- struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
- if (sb1000_debug > 2)
- printk(KERN_DEBUG "%s: Shutting down sb1000.n", dev->name);
- netif_stop_queue(dev);
-
- ioaddr[0] = dev->base_addr;
- /* rmem_end holds the second I/O address - fv */
- ioaddr[1] = dev->rmem_end;
- free_irq(dev->irq, dev);
- /* If we don't do this, we can't re-insmod it later. */
- release_region(ioaddr[1], SB1000_IO_EXTENT);
- release_region(ioaddr[0], SB1000_IO_EXTENT);
- /* free rx_skb's if needed */
- for (i=0; i<4; i++) {
- if (lp->rx_skb[i]) {
- dev_kfree_skb(lp->rx_skb[i]);
- }
- }
- return 0;
- }
- #ifdef MODULE
- MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
- MODULE_DESCRIPTION("General Instruments SB1000 driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(io, "1-2i");
- MODULE_PARM(irq, "i");
- MODULE_PARM_DESC(io, "SB1000 I/O base addresses");
- MODULE_PARM_DESC(irq, "SB1000 IRQ number");
- static struct net_device dev_sb1000;
- static int io[2];
- static int irq;
- int
- init_module(void)
- {
- int i;
- for (i = 0; i < 100; i++) {
- sprintf(dev_sb1000.name, "cm%d", i);
- if (dev_get(dev_sb1000.name) == 0) break;
- }
- if (i == 100) {
- printk(KERN_ERR "sb1000: can't register any device cm<n>n");
- return -ENFILE;
- }
- dev_sb1000.init = sb1000_probe;
- dev_sb1000.base_addr = io[0];
- /* rmem_end holds the second I/O address - fv */
- dev_sb1000.rmem_end = io[1];
- dev_sb1000.irq = irq;
- if (register_netdev(&dev_sb1000) != 0) {
- printk(KERN_ERR "sb1000: failed to register device (io: %03x,%03x "
- "irq: %d)n", io[0], io[1], irq);
- return -EIO;
- }
- return 0;
- }
- void cleanup_module(void)
- {
- unregister_netdev(&dev_sb1000);
- release_region(dev_sb1000.base_addr, 16);
- release_region(dev_sb1000.rmem_end, 16);
- kfree(dev_sb1000.priv);
- dev_sb1000.priv = NULL;
- }
- #endif /* MODULE */
- /*
- * Local variables:
- * compile-command: "gcc -D__KERNEL__ -DMODULE -Wall -Wstrict-prototypes -O -m486 -c sb1000.c"
- * version-control: t
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- */