--- /dev/null
+/**
+ * ipoctal.c
+ *
+ * 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>
+ *
+ * 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; version 2 of the License.
+ */
+
+#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/atomic.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;
+ atomic_t open;
+ struct tty_port tty_port;
+ union scc2698_channel __iomem *regs;
+ union scc2698_block __iomem *block_regs;
+ unsigned int board_id;
+ unsigned char *board_write;
+ u8 isr_rx_rdy_mask;
+ u8 isr_tx_rdy_mask;
+};
+
+struct ipoctal {
+ struct ipack_device *dev;
+ unsigned int board_id;
+ struct ipoctal_channel channel[NR_CHANNELS];
+ unsigned char write;
+ struct tty_driver *tty_drv;
+ u8 __iomem *mem8_space;
+ u8 __iomem *int_space;
+};
+
+static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty)
+{
+ struct ipoctal_channel *channel;
+
+ channel = dev_get_drvdata(tty->dev);
+
+ iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
+ return 0;
+}
+
+static int ipoctal_open(struct tty_struct *tty, struct file *file)
+{
+ int res;
+ struct ipoctal_channel *channel;
+
+ channel = dev_get_drvdata(tty->dev);
+
+ if (atomic_read(&channel->open))
+ return -EBUSY;
+
+ tty->driver_data = channel;
+
+ res = tty_port_open(&channel->tty_port, tty, file);
+ if (res)
+ return res;
+
+ atomic_inc(&channel->open);
+ return 0;
+}
+
+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);
+
+ if (atomic_dec_and_test(&channel->open))
+ 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,
+ struct tty_struct *tty, u8 sr)
+{
+ unsigned char value;
+ unsigned char flag = TTY_NORMAL;
+ u8 isr;
+
+ do {
+ value = ioread8(&channel->regs->r.rhr);
+ /* 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(tty, 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) {
+ iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr);
+ channel->stats.rcv_break++;
+ flag = TTY_BREAK;
+ }
+ }
+ tty_insert_flip_char(tty, 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(tty);
+}
+
+static void ipoctal_irq_tx(struct ipoctal_channel *channel)
+{
+ unsigned char value;
+ unsigned int *pointer_write = &channel->pointer_write;
+
+ if (channel->nb_bytes <= 0) {
+ channel->nb_bytes = 0;
+ return;
+ }
+
+ 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--;
+
+ if ((channel->nb_bytes == 0) &&
+ (waitqueue_active(&channel->queue))) {
+
+ if (channel->board_id != IPACK1_DEVICE_ID_SBS_OCTAL_485) {
+ *channel->board_write = 1;
+ wake_up_interruptible(&channel->queue);
+ }
+ }
+}
+
+static void ipoctal_irq_channel(struct ipoctal_channel *channel)
+{
+ u8 isr, sr;
+ struct tty_struct *tty;
+
+ /* If there is no client, skip the check */
+ if (!atomic_read(&channel->open))
+ return;
+
+ tty = tty_port_tty_get(&channel->tty_port);
+ if (!tty)
+ return;
+ /* 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);
+
+ /* 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) &&
+ (sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) {
+ iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
+ iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr);
+ iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
+ *channel->board_write = 1;
+ wake_up_interruptible(&channel->queue);
+ }
+
+ /* RX data */
+ if ((isr & channel->isr_rx_rdy_mask) && (sr & SR_RX_READY))
+ ipoctal_irq_rx(channel, tty, sr);
+
+ /* TX of each character */
+ if ((isr & channel->isr_tx_rdy_mask) && (sr & SR_TX_READY))
+ ipoctal_irq_tx(channel);
+
+ tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
+}
+
+static irqreturn_t ipoctal_irq_handler(void *arg)
+{
+ unsigned int i;
+ struct ipoctal *ipoctal = (struct ipoctal *) arg;
+
+ /* Check all channels */
+ for (i = 0; i < NR_CHANNELS; i++)
+ ipoctal_irq_channel(&ipoctal->channel[i]);
+
+ /* Clear the IPack device interrupt */
+ readw(ipoctal->int_space + ACK_INT_REQ0);
+ readw(ipoctal->int_space + ACK_INT_REQ1);
+
+ 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 *tty;
+ char name[20];
+ 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_nocache(&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_nocache(&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_nocache(&ipoctal->dev->dev,
+ region->start, 0x8000);
+ if (!addr) {
+ 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_write = &ipoctal->write;
+ 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;
+ }
+
+ iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
+ 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);
+ }
+
+ /*
+ * 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);
+ /* Dummy write */
+ iowrite8(1, ipoctal->mem8_space + 1);
+
+ /* Register the TTY device */
+
+ /* Each IP-OCTAL channel is a TTY port */
+ tty = alloc_tty_driver(NR_CHANNELS);
+
+ if (!tty)
+ return -ENOMEM;
+
+ /* Fill struct tty_driver with ipoctal data */
+ tty->owner = THIS_MODULE;
+ tty->driver_name = KBUILD_MODNAME;
+ sprintf(name, KBUILD_MODNAME ".%d.%d.", bus_nr, slot);
+ tty->name = name;
+ tty->major = 0;
+
+ tty->minor_start = 0;
+ tty->type = TTY_DRIVER_TYPE_SERIAL;
+ tty->subtype = SERIAL_TYPE_NORMAL;
+ tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ tty->init_termios = tty_std_termios;
+ tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ tty->init_termios.c_ispeed = 9600;
+ tty->init_termios.c_ospeed = 9600;
+
+ tty_set_operations(tty, &ipoctal_fops);
+ res = tty_register_driver(tty);
+ if (res) {
+ dev_err(&ipoctal->dev->dev, "Can't register tty driver.\n");
+ put_tty_driver(tty);
+ return res;
+ }
+
+ /* Save struct tty_driver for use it when uninstalling the device */
+ ipoctal->tty_drv = tty;
+
+ for (i = 0; i < NR_CHANNELS; i++) {
+ struct device *tty_dev;
+
+ channel = &ipoctal->channel[i];
+ tty_port_init(&channel->tty_port);
+ tty_port_alloc_xmit_buf(&channel->tty_port);
+ channel->tty_port.ops = &ipoctal_tty_port_ops;
+
+ ipoctal_reset_stats(&channel->stats);
+ channel->nb_bytes = 0;
+ init_waitqueue_head(&channel->queue);
+
+ spin_lock_init(&channel->lock);
+ channel->pointer_read = 0;
+ channel->pointer_write = 0;
+ tty_dev = tty_port_register_device(&channel->tty_port, tty, i, NULL);
+ if (IS_ERR(tty_dev)) {
+ dev_err(&ipoctal->dev->dev, "Failed to register tty device.\n");
++ tty_port_destroy(&channel->tty_port);
+ continue;
+ }
+ dev_set_drvdata(tty_dev, channel);
+
+ /*
+ * Enable again the RX. TX will be enabled when
+ * there is something to send
+ */
+ iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
+ }
+
+ return 0;
+}
+
+static inline int ipoctal_copy_write_buffer(struct ipoctal_channel *channel,
+ const unsigned char *buf,
+ int count)
+{
+ unsigned long flags;
+ int 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 int ipoctal_write_tty(struct tty_struct *tty,
+ const unsigned char *buf, int count)
+{
+ struct ipoctal_channel *channel = tty->driver_data;
+ unsigned int 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);
+ 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);
+ wait_event_interruptible(channel->queue, *channel->board_write);
+ iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
+
+ *channel->board_write = 0;
+ return char_copied;
+}
+
+static int ipoctal_write_room(struct tty_struct *tty)
+{
+ struct ipoctal_channel *channel = tty->driver_data;
+
+ return PAGE_SIZE - channel->nb_bytes;
+}
+
+static 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,
+ 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 */
+ iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
+ 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);
+
+ /* 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;
+ break;
+ }
+
+ 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 */
+ 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);
+
+ iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
+ 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);
+
+ clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);
+ wake_up_interruptible(&channel->tty_port.open_wait);
+}
+
+static const struct tty_operations ipoctal_fops = {
+ .ioctl = NULL,
+ .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,
+};
+
+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];
+ 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);
+ put_tty_driver(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);
projects / ~shefty / rdma-dev.git / commitdiff