diff options
Diffstat (limited to 'drivers/net/sb1000.c')
| -rw-r--r-- | drivers/net/sb1000.c | 1173 |
1 files changed, 1173 insertions, 0 deletions
diff --git a/drivers/net/sb1000.c b/drivers/net/sb1000.c new file mode 100644 index 000000000..e88af978f --- /dev/null +++ b/drivers/net/sb1000.c @@ -0,0 +1,1173 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* 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 + + + 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/kernel.h> +#include <linux/sched.h> +#include <linux/string.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/if_cablemodem.h> /* for SIOGCM/SIOSCM stuff */ +#include <linux/in.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 <linux/etherdevice.h> +#include <linux/pnp.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <linux/gfp.h> + +#include <asm/io.h> +#include <asm/processor.h> +#include <linux/uaccess.h> + +#ifdef SB1000_DEBUG +static int sb1000_debug = SB1000_DEBUG; +#else +static const 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]; +}; + +/* 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 netdev_tx_t sb1000_start_xmit(struct sk_buff *skb, + struct net_device *dev); +static irqreturn_t sb1000_interrupt(int irq, void *dev_id); +static int sb1000_close(struct net_device *dev); + + +/* SB1000 hardware routines to be used during open/configuration phases */ +static int card_wait_for_busy_clear(const int ioaddr[], + const char* name); +static int card_wait_for_ready(const int ioaddr[], const char* name, + unsigned char in[]); +static 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 int sb1000_wait_for_ready(const int ioaddr[], const char* name); +static int sb1000_wait_for_ready_clear(const int ioaddr[], + const char* name); +static void sb1000_send_command(const int ioaddr[], const char* name, + const unsigned char out[]); +static void sb1000_read_status(const int ioaddr[], unsigned char in[]); +static void sb1000_issue_read_command(const int ioaddr[], + const char* name); + +/* SB1000 commands for open/configuration */ +static int sb1000_reset(const int ioaddr[], const char* name); +static 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 int sb1000_end_get_set_command(const int ioaddr[], + const char* name); +static int sb1000_activate(const int ioaddr[], const char* name); +static int sb1000_get_firmware_version(const int ioaddr[], + const char* name, unsigned char version[], int do_end); +static int sb1000_get_frequency(const int ioaddr[], const char* name, + int* frequency); +static int sb1000_set_frequency(const int ioaddr[], const char* name, + int frequency); +static int sb1000_get_PIDs(const int ioaddr[], const char* name, + short PID[]); +static int sb1000_set_PIDs(const int ioaddr[], const char* name, + const short PID[]); + +/* SB1000 commands for frame rx interrupt */ +static int sb1000_rx(struct net_device *dev); +static void sb1000_error_dpc(struct net_device *dev); + +static const struct pnp_device_id sb1000_pnp_ids[] = { + { "GIC1000", 0 }, + { "", 0 } +}; +MODULE_DEVICE_TABLE(pnp, sb1000_pnp_ids); + +static const struct net_device_ops sb1000_netdev_ops = { + .ndo_open = sb1000_open, + .ndo_start_xmit = sb1000_start_xmit, + .ndo_do_ioctl = sb1000_dev_ioctl, + .ndo_stop = sb1000_close, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int +sb1000_probe_one(struct pnp_dev *pdev, const struct pnp_device_id *id) +{ + struct net_device *dev; + unsigned short ioaddr[2], irq; + unsigned int serial_number; + int error = -ENODEV; + + if (pnp_device_attach(pdev) < 0) + return -ENODEV; + if (pnp_activate_dev(pdev) < 0) + goto out_detach; + + if (!pnp_port_valid(pdev, 0) || !pnp_port_valid(pdev, 1)) + goto out_disable; + if (!pnp_irq_valid(pdev, 0)) + goto out_disable; + + serial_number = pdev->card->serial; + + ioaddr[0] = pnp_port_start(pdev, 0); + ioaddr[1] = pnp_port_start(pdev, 0); + + irq = pnp_irq(pdev, 0); + + if (!request_region(ioaddr[0], 16, "sb1000")) + goto out_disable; + if (!request_region(ioaddr[1], 16, "sb1000")) + goto out_release_region0; + + dev = alloc_etherdev(sizeof(struct sb1000_private)); + if (!dev) { + error = -ENOMEM; + goto out_release_regions; + } + + + dev->base_addr = ioaddr[0]; + /* mem_start holds the second I/O address */ + dev->mem_start = 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->mem_start, serial_number, dev->irq); + + /* + * The SB1000 is an rx-only cable modem device. The uplink is a modem + * and we do not want to arp on it. + */ + dev->flags = IFF_POINTOPOINT|IFF_NOARP; + + SET_NETDEV_DEV(dev, &pdev->dev); + + if (sb1000_debug > 0) + printk(KERN_NOTICE "%s", version); + + dev->netdev_ops = &sb1000_netdev_ops; + + /* hardware address is 0:0:serial_number */ + 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; + + pnp_set_drvdata(pdev, dev); + + error = register_netdev(dev); + if (error) + goto out_free_netdev; + return 0; + + out_free_netdev: + free_netdev(dev); + out_release_regions: + release_region(ioaddr[1], 16); + out_release_region0: + release_region(ioaddr[0], 16); + out_disable: + pnp_disable_dev(pdev); + out_detach: + pnp_device_detach(pdev); + return error; +} + +static void +sb1000_remove_one(struct pnp_dev *pdev) +{ + struct net_device *dev = pnp_get_drvdata(pdev); + + unregister_netdev(dev); + release_region(dev->base_addr, 16); + release_region(dev->mem_start, 16); + free_netdev(dev); +} + +static struct pnp_driver sb1000_driver = { + .name = "sb1000", + .id_table = sb1000_pnp_ids, + .probe = sb1000_probe_one, + .remove = sb1000_remove_one, +}; + + +/* + * SB1000 hardware routines to be used during open/configuration phases + */ + +static const int TimeOutJiffies = (875 * HZ) / 100; + +/* Card Wait For Busy Clear (cannot be used during an interrupt) */ +static 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 */ + yield(); + + a = inb(ioaddr[0] + 7); + if (time_after_eq(jiffies, timeout)) { + printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n", + name); + return -ETIME; + } + } + + return 0; +} + +/* Card Wait For Ready (cannot be used during an interrupt) */ +static 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 */ + yield(); + + a = inb(ioaddr[1] + 6); + if (time_after_eq(jiffies, timeout)) { + printk(KERN_WARNING "%s: card_wait_for_ready timeout\n", + 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 int +card_send_command(const int ioaddr[], const char* name, + const unsigned char out[], unsigned char in[]) +{ + int status; + + 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%02x\n", 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%02x\n", name, + out[0], out[1], out[2], out[3], out[4], out[5]); + } + + if (out[1] != 0x1b) { + if (out[0] >= 0x80 && in[0] != (out[1] | 0x80)) + return -EIO; + } + return 0; +} + + +/* + * SB1000 hardware routines to be used during frame rx interrupt + */ +static const int Sb1000TimeOutJiffies = 7 * HZ; + +/* Card Wait For Ready (to be used during frame rx) */ +static int +sb1000_wait_for_ready(const int ioaddr[], const char* name) +{ + unsigned long timeout; + + timeout = jiffies + Sb1000TimeOutJiffies; + while (inb(ioaddr[1] + 6) & 0x80) { + if (time_after_eq(jiffies, timeout)) { + printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n", + name); + return -ETIME; + } + } + timeout = jiffies + Sb1000TimeOutJiffies; + while (!(inb(ioaddr[1] + 6) & 0x40)) { + if (time_after_eq(jiffies, timeout)) { + printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n", + name); + return -ETIME; + } + } + inb(ioaddr[0] + 7); + return 0; +} + +/* Card Wait For Ready Clear (to be used during frame rx) */ +static 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 (time_after_eq(jiffies, timeout)) { + printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n", + name); + return -ETIME; + } + } + timeout = jiffies + Sb1000TimeOutJiffies; + while (inb(ioaddr[1] + 6) & 0x40) { + if (time_after_eq(jiffies, timeout)) { + printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n", + name); + return -ETIME; + } + } + return 0; +} + +/* Card Send Command (to be used during frame rx) */ +static 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%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]); +} + +/* Card Read Status (to be used during frame rx) */ +static 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); +} + +/* Issue Read Command (to be used during frame rx) */ +static void +sb1000_issue_read_command(const int ioaddr[], const char* name) +{ + static 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); +} + + +/* + * SB1000 commands for open/configuration + */ +/* reset SB1000 card */ +static int +sb1000_reset(const int ioaddr[], const char* name) +{ + static const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + int port, status; + + port = ioaddr[1] + 6; + outb(0x4, port); + inb(port); + udelay(1000); + outb(0x0, port); + inb(port); + ssleep(1); + 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 int +sb1000_check_CRC(const int ioaddr[], const char* name) +{ + static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + int status; + + /* check CRC */ + if ((status = card_send_command(ioaddr, name, Command0, st))) + return status; + if (st[1] != st[3] || st[2] != st[4]) + return -EIO; + return 0; +} + +static inline int +sb1000_start_get_set_command(const int ioaddr[], const char* name) +{ + static const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + + return card_send_command(ioaddr, name, Command0, st); +} + +static int +sb1000_end_get_set_command(const int ioaddr[], const char* name) +{ + static const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00}; + static const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + int status; + + if ((status = card_send_command(ioaddr, name, Command0, st))) + return status; + return card_send_command(ioaddr, name, Command1, st); +} + +static int +sb1000_activate(const int ioaddr[], const char* name) +{ + static const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00}; + static const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + int status; + + ssleep(1); + status = card_send_command(ioaddr, name, Command0, st); + if (status) + return status; + status = card_send_command(ioaddr, name, Command1, st); + if (status) + return status; + if (st[3] != 0xf1) { + status = sb1000_start_get_set_command(ioaddr, name); + if (status) + return status; + return -EIO; + } + udelay(1000); + return sb1000_start_get_set_command(ioaddr, name); +} + +/* get SB1000 firmware version */ +static int +sb1000_get_firmware_version(const int ioaddr[], const char* name, + unsigned char version[], int do_end) +{ + static const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + int status; + + 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 int +sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency) +{ + static const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + int status; + + 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 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] kHz\n", 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 int +sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[]) +{ + static const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00}; + static const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00}; + static const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00}; + static const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00}; + + unsigned char st[7]; + int status; + + 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 int +sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[]) +{ + static const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; + + 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}; + + 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 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 %02x\n", 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:%d\n", 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"); + } + } +} + +/* + * SB1000 commands for frame rx interrupt + */ +/* receive a single frame and assemble datagram + * (this is the heart of the interrupt routine) + */ +static 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 = netdev_priv(dev); + struct net_device_stats *stats = &dev->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 %02x\n", 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 %02x\n", dev->name, st[0], st[1], + skb ? session_id : session_id | 0x40, frame_id); + if (skb) { + dev_kfree_skb(skb); + skb = NULL; + } + +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%02x\n", 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 %02x\n", 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 " + "skbuff\n", dev->name, skbsize); + stats->rx_dropped++; + insw(ioaddr, buffer, NewDatagramDataSize / 2); + goto dropped_frame; + } + skb->dev = dev; + skb_reset_mac_header(skb); + 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 %02x\n", 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); + stats->rx_bytes+=dlen; + stats->rx_packets++; + lp->rx_skb[ns] = NULL; + 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 %02x\n", + 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] = NULL; + } + lp->rx_session_id[ns] |= 0x40; + } + return -1; +} + +static void +sb1000_error_dpc(struct net_device *dev) +{ + static const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00}; + + char *name; + unsigned char st[5]; + int ioaddr[2]; + struct sb1000_private *lp = netdev_priv(dev); + const int ErrorDpcCounterInitialize = 200; + + ioaddr[0] = dev->base_addr; + /* mem_start holds the second I/O address */ + ioaddr[1] = dev->mem_start; + 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; +} + + +/* + * Linux interface functions + */ +static int +sb1000_open(struct net_device *dev) +{ + char *name; + int ioaddr[2], status; + struct sb1000_private *lp = netdev_priv(dev); + const unsigned short FirmwareVersion[] = {0x01, 0x01}; + + ioaddr[0] = dev->base_addr; + /* mem_start holds the second I/O address */ + ioaddr[1] = dev->mem_start; + name = dev->name; + + /* initialize sb1000 */ + if ((status = sb1000_reset(ioaddr, name))) + return status; + ssleep(1); + 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[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; + if (request_irq(dev->irq, sb1000_interrupt, 0, "sb1000", dev)) { + return -EAGAIN; + } + + if (sb1000_debug > 2) + printk(KERN_DEBUG "%s: Opening, IRQ %d\n", 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 = netdev_priv(dev); + + if (!(dev && dev->flags & IFF_UP)) + return -ENODEV; + + ioaddr[0] = dev->base_addr; + /* mem_start holds the second I/O address */ + ioaddr[1] = dev->mem_start; + name = dev->name; + + switch (cmd) { + case SIOCGCMSTATS: /* get statistics */ + stats[0] = dev->stats.rx_bytes; + stats[1] = lp->rx_frames; + stats[2] = dev->stats.rx_packets; + stats[3] = dev->stats.rx_errors; + stats[4] = dev->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 __user *) ifr->ifr_data)) + return -EFAULT; + break; + + case SIOCSCMFREQUENCY: /* set frequency */ + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + if(get_user(frequency, (int __user *) 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 netdev_tx_t +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 NETDEV_TX_OK; +} + +/* SB1000 interrupt handler. */ +static irqreturn_t sb1000_interrupt(int irq, void *dev_id) +{ + static const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00}; + static const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00}; + + char *name; + unsigned char st; + int ioaddr[2]; + struct net_device *dev = dev_id; + struct sb1000_private *lp = netdev_priv(dev); + + const int MaxRxErrorCount = 6; + + ioaddr[0] = dev->base_addr; + /* mem_start holds the second I/O address */ + ioaddr[1] = dev->mem_start; + name = dev->name; + + /* is it a good interrupt? */ + st = inb(ioaddr[1] + 6); + if (!(st & 0x08 && st & 0x20)) { + return IRQ_NONE; + } + + if (sb1000_debug > 3) + printk(KERN_DEBUG "%s: entering interrupt\n", 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 IRQ_HANDLED; +} + +static int sb1000_close(struct net_device *dev) +{ + int i; + int ioaddr[2]; + struct sb1000_private *lp = netdev_priv(dev); + + if (sb1000_debug > 2) + printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name); + + netif_stop_queue(dev); + + ioaddr[0] = dev->base_addr; + /* mem_start holds the second I/O address */ + ioaddr[1] = dev->mem_start; + + 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; +} + +MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>"); +MODULE_DESCRIPTION("General Instruments SB1000 driver"); +MODULE_LICENSE("GPL"); + +module_pnp_driver(sb1000_driver); |