Quelle  ipoctal.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * driver for the GE IP-OCTAL boards
 *
 * Copyright (C) 2009-2012 CERN (www.cern.ch)
 * Author: Nicolas Serafini, EIC2 SA
 * Author: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/tty_flip.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/ipack.h>
#include "ipoctal.h"
#include "scc2698.h"

#define IP_OCTAL_ID_SPACE_VECTOR    0x41
#define IP_OCTAL_NB_BLOCKS          4

static const struct tty_operations ipoctal_fops;

struct ipoctal_channel {
 struct ipoctal_stats  stats;
 unsigned int   nb_bytes;
 wait_queue_head_t  queue;
 spinlock_t   lock;
 unsigned int   pointer_read;
 unsigned int   pointer_write;
 struct tty_port   tty_port;
 bool    tty_registered;
 union scc2698_channel __iomem *regs;
 union scc2698_block __iomem *block_regs;
 unsigned int   board_id;
 u8    isr_rx_rdy_mask;
 u8    isr_tx_rdy_mask;
 unsigned int   rx_enable;
};

struct ipoctal {
 struct ipack_device  *dev;
 unsigned int   board_id;
 struct ipoctal_channel  channel[NR_CHANNELS];
 struct tty_driver  *tty_drv;
 u8 __iomem   *mem8_space;
 u8 __iomem   *int_space;
};

static inline struct ipoctal *chan_to_ipoctal(struct ipoctal_channel *chan,
           unsigned int index)
{
 return container_of(chan, struct ipoctal, channel[index]);
}

static void ipoctal_reset_channel(struct ipoctal_channel *channel)
{
 iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
 channel->rx_enable = 0;
 iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
 iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
 iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
 iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);
}

static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty)
{
 struct ipoctal_channel *channel;

 channel = dev_get_drvdata(tty->dev);

 /*
 * Enable RX. TX will be enabled when
 * there is something to send
 */
 iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
 channel->rx_enable = 1;
 return 0;
}

static int ipoctal_install(struct tty_driver *driver, struct tty_struct *tty)
{
 struct ipoctal_channel *channel = dev_get_drvdata(tty->dev);
 struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);
 int res;

 if (!ipack_get_carrier(ipoctal->dev))
  return -EBUSY;

 res = tty_standard_install(driver, tty);
 if (res)
  goto err_put_carrier;

 tty->driver_data = channel;

 return 0;

err_put_carrier:
 ipack_put_carrier(ipoctal->dev);

 return res;
}

static int ipoctal_open(struct tty_struct *tty, struct file *file)
{
 struct ipoctal_channel *channel = tty->driver_data;

 return tty_port_open(&channel->tty_port, tty, file);
}

static void ipoctal_reset_stats(struct ipoctal_stats *stats)
{
 stats->tx = 0;
 stats->rx = 0;
 stats->rcv_break = 0;
 stats->framing_err = 0;
 stats->overrun_err = 0;
 stats->parity_err = 0;
}

static void ipoctal_free_channel(struct ipoctal_channel *channel)
{
 ipoctal_reset_stats(&channel->stats);
 channel->pointer_read = 0;
 channel->pointer_write = 0;
 channel->nb_bytes = 0;
}

static void ipoctal_close(struct tty_struct *tty, struct file *filp)
{
 struct ipoctal_channel *channel = tty->driver_data;

 tty_port_close(&channel->tty_port, tty, filp);
 ipoctal_free_channel(channel);
}

static int ipoctal_get_icount(struct tty_struct *tty,
         struct serial_icounter_struct *icount)
{
 struct ipoctal_channel *channel = tty->driver_data;

 icount->cts = 0;
 icount->dsr = 0;
 icount->rng = 0;
 icount->dcd = 0;
 icount->rx = channel->stats.rx;
 icount->tx = channel->stats.tx;
 icount->frame = channel->stats.framing_err;
 icount->parity = channel->stats.parity_err;
 icount->brk = channel->stats.rcv_break;
 return 0;
}

static void ipoctal_irq_rx(struct ipoctal_channel *channel, u8 sr)
{
 struct tty_port *port = &channel->tty_port;
 u8 isr, value, flag;

 do {
  value = ioread8(&channel->regs->r.rhr);
  flag = TTY_NORMAL;
  /* Error: count statistics */
  if (sr & SR_ERROR) {
   iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);

   if (sr & SR_OVERRUN_ERROR) {
    channel->stats.overrun_err++;
    /* Overrun doesn't affect the current character*/
    tty_insert_flip_char(port, 0, TTY_OVERRUN);
   }
   if (sr & SR_PARITY_ERROR) {
    channel->stats.parity_err++;
    flag = TTY_PARITY;
   }
   if (sr & SR_FRAMING_ERROR) {
    channel->stats.framing_err++;
    flag = TTY_FRAME;
   }
   if (sr & SR_RECEIVED_BREAK) {
    channel->stats.rcv_break++;
    flag = TTY_BREAK;
   }
  }
  tty_insert_flip_char(port, value, flag);

  /* Check if there are more characters in RX FIFO
 * If there are more, the isr register for this channel
 * has enabled the RxRDY|FFULL bit.
 */
  isr = ioread8(&channel->block_regs->r.isr);
  sr = ioread8(&channel->regs->r.sr);
 } while (isr & channel->isr_rx_rdy_mask);

 tty_flip_buffer_push(port);
}

static void ipoctal_irq_tx(struct ipoctal_channel *channel)
{
 unsigned int *pointer_write = &channel->pointer_write;
 u8 value;

 if (channel->nb_bytes == 0)
  return;

 spin_lock(&channel->lock);
 value = channel->tty_port.xmit_buf[*pointer_write];
 iowrite8(value, &channel->regs->w.thr);
 channel->stats.tx++;
 (*pointer_write)++;
 *pointer_write = *pointer_write % PAGE_SIZE;
 channel->nb_bytes--;
 spin_unlock(&channel->lock);
}

static void ipoctal_irq_channel(struct ipoctal_channel *channel)
{
 u8 isr, sr;

 /* The HW is organized in pair of channels.  See which register we need
 * to read from */
 isr = ioread8(&channel->block_regs->r.isr);
 sr = ioread8(&channel->regs->r.sr);

 if (isr & (IMR_DELTA_BREAK_A | IMR_DELTA_BREAK_B))
  iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr);

 if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) {
  iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
  /* In case of RS-485, change from TX to RX when finishing TX.
 * Half-duplex. */
  if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {
   iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr);
   iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
   channel->rx_enable = 1;
  }
 }

 /* RX data */
 if ((isr & channel->isr_rx_rdy_mask) && (sr & SR_RX_READY))
  ipoctal_irq_rx(channel, sr);

 /* TX of each character */
 if ((isr & channel->isr_tx_rdy_mask) && (sr & SR_TX_READY))
  ipoctal_irq_tx(channel);
}

static irqreturn_t ipoctal_irq_handler(void *arg)
{
 unsigned int i;
 struct ipoctal *ipoctal = arg;

 /* Clear the IPack device interrupt */
 readw(ipoctal->int_space + ACK_INT_REQ0);
 readw(ipoctal->int_space + ACK_INT_REQ1);

 /* Check all channels */
 for (i = 0; i < NR_CHANNELS; i++)
  ipoctal_irq_channel(&ipoctal->channel[i]);

 return IRQ_HANDLED;
}

static const struct tty_port_operations ipoctal_tty_port_ops = {
 .dtr_rts = NULL,
 .activate = ipoctal_port_activate,
};

static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
        unsigned int slot)
{
 int res;
 int i;
 struct tty_driver *drv;
 struct ipoctal_channel *channel;
 struct ipack_region *region;
 void __iomem *addr;
 union scc2698_channel __iomem *chan_regs;
 union scc2698_block __iomem *block_regs;

 ipoctal->board_id = ipoctal->dev->id_device;

 region = &ipoctal->dev->region[IPACK_IO_SPACE];
 addr = devm_ioremap(&ipoctal->dev->dev,
        region->start, region->size);
 if (!addr) {
  dev_err(&ipoctal->dev->dev,
   "Unable to map slot [%d:%d] IO space!\n",
   bus_nr, slot);
  return -EADDRNOTAVAIL;
 }
 /* Save the virtual address to access the registers easily */
 chan_regs =
  (union scc2698_channel __iomem *) addr;
 block_regs =
  (union scc2698_block __iomem *) addr;

 region = &ipoctal->dev->region[IPACK_INT_SPACE];
 ipoctal->int_space =
  devm_ioremap(&ipoctal->dev->dev,
         region->start, region->size);
 if (!ipoctal->int_space) {
  dev_err(&ipoctal->dev->dev,
   "Unable to map slot [%d:%d] INT space!\n",
   bus_nr, slot);
  return -EADDRNOTAVAIL;
 }

 region = &ipoctal->dev->region[IPACK_MEM8_SPACE];
 ipoctal->mem8_space =
  devm_ioremap(&ipoctal->dev->dev,
         region->start, 0x8000);
 if (!ipoctal->mem8_space) {
  dev_err(&ipoctal->dev->dev,
   "Unable to map slot [%d:%d] MEM8 space!\n",
   bus_nr, slot);
  return -EADDRNOTAVAIL;
 }


 /* Disable RX and TX before touching anything */
 for (i = 0; i < NR_CHANNELS ; i++) {
  struct ipoctal_channel *channel = &ipoctal->channel[i];
  channel->regs = chan_regs + i;
  channel->block_regs = block_regs + (i >> 1);
  channel->board_id = ipoctal->board_id;
  if (i & 1) {
   channel->isr_tx_rdy_mask = ISR_TxRDY_B;
   channel->isr_rx_rdy_mask = ISR_RxRDY_FFULL_B;
  } else {
   channel->isr_tx_rdy_mask = ISR_TxRDY_A;
   channel->isr_rx_rdy_mask = ISR_RxRDY_FFULL_A;
  }

  ipoctal_reset_channel(channel);
  iowrite8(MR1_CHRL_8_BITS | MR1_ERROR_CHAR | MR1_RxINT_RxRDY,
    &channel->regs->w.mr); /* mr1 */
  iowrite8(0, &channel->regs->w.mr); /* mr2 */
  iowrite8(TX_CLK_9600  | RX_CLK_9600, &channel->regs->w.csr);
 }

 for (i = 0; i < IP_OCTAL_NB_BLOCKS; i++) {
  iowrite8(ACR_BRG_SET2, &block_regs[i].w.acr);
  iowrite8(OPCR_MPP_OUTPUT | OPCR_MPOa_RTSN | OPCR_MPOb_RTSN,
    &block_regs[i].w.opcr);
  iowrite8(IMR_TxRDY_A | IMR_RxRDY_FFULL_A | IMR_DELTA_BREAK_A |
    IMR_TxRDY_B | IMR_RxRDY_FFULL_B | IMR_DELTA_BREAK_B,
    &block_regs[i].w.imr);
 }

 /* Dummy write */
 iowrite8(1, ipoctal->mem8_space + 1);

 /* Register the TTY device */

 /* Each IP-OCTAL channel is a TTY port */
 drv = tty_alloc_driver(NR_CHANNELS, TTY_DRIVER_REAL_RAW |
   TTY_DRIVER_DYNAMIC_DEV);
 if (IS_ERR(drv))
  return PTR_ERR(drv);

 /* Fill struct tty_driver with ipoctal data */
 drv->owner = THIS_MODULE;
 drv->driver_name = KBUILD_MODNAME;
 drv->name = kasprintf(GFP_KERNEL, KBUILD_MODNAME ".%d.%d.", bus_nr, slot);
 if (!drv->name) {
  res = -ENOMEM;
  goto err_put_driver;
 }
 drv->major = 0;

 drv->minor_start = 0;
 drv->type = TTY_DRIVER_TYPE_SERIAL;
 drv->subtype = SERIAL_TYPE_NORMAL;
 drv->init_termios = tty_std_termios;
 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
 drv->init_termios.c_ispeed = 9600;
 drv->init_termios.c_ospeed = 9600;

 tty_set_operations(drv, &ipoctal_fops);
 res = tty_register_driver(drv);
 if (res) {
  dev_err(&ipoctal->dev->dev, "Can't register tty driver.\n");
  goto err_free_name;
 }

 /* Save struct tty_driver for use it when uninstalling the device */
 ipoctal->tty_drv = drv;

 for (i = 0; i < NR_CHANNELS; i++) {
  struct device *tty_dev;

  channel = &ipoctal->channel[i];
  tty_port_init(&channel->tty_port);
  res = tty_port_alloc_xmit_buf(&channel->tty_port);
  if (res)
   continue;
  channel->tty_port.ops = &ipoctal_tty_port_ops;

  ipoctal_reset_stats(&channel->stats);
  channel->nb_bytes = 0;
  spin_lock_init(&channel->lock);
  channel->pointer_read = 0;
  channel->pointer_write = 0;
  tty_dev = tty_port_register_device_attr(&channel->tty_port, drv,
       i, NULL, channel, NULL);
  if (IS_ERR(tty_dev)) {
   dev_err(&ipoctal->dev->dev, "Failed to register tty device.\n");
   tty_port_free_xmit_buf(&channel->tty_port);
   tty_port_destroy(&channel->tty_port);
   continue;
  }
  channel->tty_registered = true;
 }

 /*
 * IP-OCTAL has different addresses to copy its IRQ vector.
 * Depending of the carrier these addresses are accesible or not.
 * More info in the datasheet.
 */
 ipoctal->dev->bus->ops->request_irq(ipoctal->dev,
           ipoctal_irq_handler, ipoctal);

 return 0;

err_free_name:
 kfree(drv->name);
err_put_driver:
 tty_driver_kref_put(drv);

 return res;
}

static inline size_t ipoctal_copy_write_buffer(struct ipoctal_channel *channel,
            const u8 *buf, size_t count)
{
 unsigned long flags;
 size_t i;
 unsigned int *pointer_read = &channel->pointer_read;

 /* Copy the bytes from the user buffer to the internal one */
 for (i = 0; i < count; i++) {
  if (i <= (PAGE_SIZE - channel->nb_bytes)) {
   spin_lock_irqsave(&channel->lock, flags);
   channel->tty_port.xmit_buf[*pointer_read] = buf[i];
   *pointer_read = (*pointer_read + 1) % PAGE_SIZE;
   channel->nb_bytes++;
   spin_unlock_irqrestore(&channel->lock, flags);
  } else {
   break;
  }
 }
 return i;
}

static ssize_t ipoctal_write_tty(struct tty_struct *tty, const u8 *buf,
     size_t count)
{
 struct ipoctal_channel *channel = tty->driver_data;
 size_t char_copied;

 char_copied = ipoctal_copy_write_buffer(channel, buf, count);

 /* As the IP-OCTAL 485 only supports half duplex, do it manually */
 if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {
  iowrite8(CR_DISABLE_RX, &channel->regs->w.cr);
  channel->rx_enable = 0;
  iowrite8(CR_CMD_ASSERT_RTSN, &channel->regs->w.cr);
 }

 /*
 * Send a packet and then disable TX to avoid failure after several send
 * operations
 */
 iowrite8(CR_ENABLE_TX, &channel->regs->w.cr);
 return char_copied;
}

static unsigned int ipoctal_write_room(struct tty_struct *tty)
{
 struct ipoctal_channel *channel = tty->driver_data;

 return PAGE_SIZE - channel->nb_bytes;
}

static unsigned int ipoctal_chars_in_buffer(struct tty_struct *tty)
{
 struct ipoctal_channel *channel = tty->driver_data;

 return channel->nb_bytes;
}

static void ipoctal_set_termios(struct tty_struct *tty,
    const struct ktermios *old_termios)
{
 unsigned int cflag;
 unsigned char mr1 = 0;
 unsigned char mr2 = 0;
 unsigned char csr = 0;
 struct ipoctal_channel *channel = tty->driver_data;
 speed_t baud;

 cflag = tty->termios.c_cflag;

 /* Disable and reset everything before change the setup */
 ipoctal_reset_channel(channel);

 /* Set Bits per chars */
 switch (cflag & CSIZE) {
 case CS6:
  mr1 |= MR1_CHRL_6_BITS;
  break;
 case CS7:
  mr1 |= MR1_CHRL_7_BITS;
  break;
 case CS8:
 default:
  mr1 |= MR1_CHRL_8_BITS;
  /* By default, select CS8 */
  tty->termios.c_cflag = (cflag & ~CSIZE) | CS8;
  break;
 }

 /* Set Parity */
 if (cflag & PARENB)
  if (cflag & PARODD)
   mr1 |= MR1_PARITY_ON | MR1_PARITY_ODD;
  else
   mr1 |= MR1_PARITY_ON | MR1_PARITY_EVEN;
 else
  mr1 |= MR1_PARITY_OFF;

 /* Mark or space parity is not supported */
 tty->termios.c_cflag &= ~CMSPAR;

 /* Set stop bits */
 if (cflag & CSTOPB)
  mr2 |= MR2_STOP_BITS_LENGTH_2;
 else
  mr2 |= MR2_STOP_BITS_LENGTH_1;

 /* Set the flow control */
 switch (channel->board_id) {
 case IPACK1_DEVICE_ID_SBS_OCTAL_232:
  if (cflag & CRTSCTS) {
   mr1 |= MR1_RxRTS_CONTROL_ON;
   mr2 |= MR2_TxRTS_CONTROL_OFF | MR2_CTS_ENABLE_TX_ON;
  } else {
   mr1 |= MR1_RxRTS_CONTROL_OFF;
   mr2 |= MR2_TxRTS_CONTROL_OFF | MR2_CTS_ENABLE_TX_OFF;
  }
  break;
 case IPACK1_DEVICE_ID_SBS_OCTAL_422:
  mr1 |= MR1_RxRTS_CONTROL_OFF;
  mr2 |= MR2_TxRTS_CONTROL_OFF | MR2_CTS_ENABLE_TX_OFF;
  break;
 case IPACK1_DEVICE_ID_SBS_OCTAL_485:
  mr1 |= MR1_RxRTS_CONTROL_OFF;
  mr2 |= MR2_TxRTS_CONTROL_ON | MR2_CTS_ENABLE_TX_OFF;
  break;
 default:
  return;
 }

 baud = tty_get_baud_rate(tty);
 tty_termios_encode_baud_rate(&tty->termios, baud, baud);

 /* Set baud rate */
 switch (baud) {
 case 75:
  csr |= TX_CLK_75 | RX_CLK_75;
  break;
 case 110:
  csr |= TX_CLK_110 | RX_CLK_110;
  break;
 case 150:
  csr |= TX_CLK_150 | RX_CLK_150;
  break;
 case 300:
  csr |= TX_CLK_300 | RX_CLK_300;
  break;
 case 600:
  csr |= TX_CLK_600 | RX_CLK_600;
  break;
 case 1200:
  csr |= TX_CLK_1200 | RX_CLK_1200;
  break;
 case 1800:
  csr |= TX_CLK_1800 | RX_CLK_1800;
  break;
 case 2000:
  csr |= TX_CLK_2000 | RX_CLK_2000;
  break;
 case 2400:
  csr |= TX_CLK_2400 | RX_CLK_2400;
  break;
 case 4800:
  csr |= TX_CLK_4800  | RX_CLK_4800;
  break;
 case 9600:
  csr |= TX_CLK_9600  | RX_CLK_9600;
  break;
 case 19200:
  csr |= TX_CLK_19200 | RX_CLK_19200;
  break;
 case 38400:
 default:
  csr |= TX_CLK_38400 | RX_CLK_38400;
  /* In case of default, we establish 38400 bps */
  tty_termios_encode_baud_rate(&tty->termios, 38400, 38400);
  break;
 }

 mr1 |= MR1_ERROR_CHAR;
 mr1 |= MR1_RxINT_RxRDY;

 /* Write the control registers */
 iowrite8(mr1, &channel->regs->w.mr);
 iowrite8(mr2, &channel->regs->w.mr);
 iowrite8(csr, &channel->regs->w.csr);

 /* Enable again the RX, if it was before */
 if (channel->rx_enable)
  iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
}

static void ipoctal_hangup(struct tty_struct *tty)
{
 unsigned long flags;
 struct ipoctal_channel *channel = tty->driver_data;

 if (channel == NULL)
  return;

 spin_lock_irqsave(&channel->lock, flags);
 channel->nb_bytes = 0;
 channel->pointer_read = 0;
 channel->pointer_write = 0;
 spin_unlock_irqrestore(&channel->lock, flags);

 tty_port_hangup(&channel->tty_port);

 ipoctal_reset_channel(channel);
 tty_port_set_initialized(&channel->tty_port, false);
 wake_up_interruptible(&channel->tty_port.open_wait);
}

static void ipoctal_shutdown(struct tty_struct *tty)
{
 struct ipoctal_channel *channel = tty->driver_data;

 if (channel == NULL)
  return;

 ipoctal_reset_channel(channel);
 tty_port_set_initialized(&channel->tty_port, false);
}

static void ipoctal_cleanup(struct tty_struct *tty)
{
 struct ipoctal_channel *channel = tty->driver_data;
 struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);

 /* release the carrier driver */
 ipack_put_carrier(ipoctal->dev);
}

static const struct tty_operations ipoctal_fops = {
 .ioctl =  NULL,
 .install =  ipoctal_install,
 .open =   ipoctal_open,
 .close =  ipoctal_close,
 .write =  ipoctal_write_tty,
 .set_termios =  ipoctal_set_termios,
 .write_room =  ipoctal_write_room,
 .chars_in_buffer = ipoctal_chars_in_buffer,
 .get_icount =  ipoctal_get_icount,
 .hangup =  ipoctal_hangup,
 .shutdown =  ipoctal_shutdown,
 .cleanup =              ipoctal_cleanup,
};

static int ipoctal_probe(struct ipack_device *dev)
{
 int res;
 struct ipoctal *ipoctal;

 ipoctal = kzalloc(sizeof(struct ipoctal), GFP_KERNEL);
 if (ipoctal == NULL)
  return -ENOMEM;

 ipoctal->dev = dev;
 res = ipoctal_inst_slot(ipoctal, dev->bus->bus_nr, dev->slot);
 if (res)
  goto out_uninst;

 dev_set_drvdata(&dev->dev, ipoctal);
 return 0;

out_uninst:
 kfree(ipoctal);
 return res;
}

static void __ipoctal_remove(struct ipoctal *ipoctal)
{
 int i;

 ipoctal->dev->bus->ops->free_irq(ipoctal->dev);

 for (i = 0; i < NR_CHANNELS; i++) {
  struct ipoctal_channel *channel = &ipoctal->channel[i];

  if (!channel->tty_registered)
   continue;

  tty_unregister_device(ipoctal->tty_drv, i);
  tty_port_free_xmit_buf(&channel->tty_port);
  tty_port_destroy(&channel->tty_port);
 }

 tty_unregister_driver(ipoctal->tty_drv);
 kfree(ipoctal->tty_drv->name);
 tty_driver_kref_put(ipoctal->tty_drv);
 kfree(ipoctal);
}

static void ipoctal_remove(struct ipack_device *idev)
{
 __ipoctal_remove(dev_get_drvdata(&idev->dev));
}

static DEFINE_IPACK_DEVICE_TABLE(ipoctal_ids) = {
 { IPACK_DEVICE(IPACK_ID_VERSION_1, IPACK1_VENDOR_ID_SBS,
   IPACK1_DEVICE_ID_SBS_OCTAL_232) },
 { IPACK_DEVICE(IPACK_ID_VERSION_1, IPACK1_VENDOR_ID_SBS,
   IPACK1_DEVICE_ID_SBS_OCTAL_422) },
 { IPACK_DEVICE(IPACK_ID_VERSION_1, IPACK1_VENDOR_ID_SBS,
   IPACK1_DEVICE_ID_SBS_OCTAL_485) },
 { 0, },
};

MODULE_DEVICE_TABLE(ipack, ipoctal_ids);

static const struct ipack_driver_ops ipoctal_drv_ops = {
 .probe  = ipoctal_probe,
 .remove = ipoctal_remove,
};

static struct ipack_driver driver = {
 .ops      = &ipoctal_drv_ops,
 .id_table = ipoctal_ids,
};

static int __init ipoctal_init(void)
{
 return ipack_driver_register(&driver, THIS_MODULE, KBUILD_MODNAME);
}

static void __exit ipoctal_exit(void)
{
 ipack_driver_unregister(&driver);
}

MODULE_DESCRIPTION("IP-Octal 232, 422 and 485 device driver");
MODULE_LICENSE("GPL");

module_init(ipoctal_init);
module_exit(ipoctal_exit);