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Subject[PATCH 04/24] Staging: ipack/devices/ipoctal: split ipoctal_channel from ipoctal.
Date
From: Jens Taprogge <jens.taprogge@taprogge.org>

By moving everything channel related into a separate struct we will be
able to clean up a lot of code. In the end tty->driver_data will no
longer need to point to ipoctal but instead can point to the respective
channel.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
---
drivers/staging/ipack/devices/ipoctal.c | 286 ++++++++++++++++---------------
1 file changed, 150 insertions(+), 136 deletions(-)

diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c
index 35513d9..9ab0e80 100644
--- a/drivers/staging/ipack/devices/ipoctal.c
+++ b/drivers/staging/ipack/devices/ipoctal.c
@@ -30,22 +30,26 @@

static const struct tty_operations ipoctal_fops;

+struct ipoctal_channel {
+ struct ipoctal_stats stats;
+ unsigned int nb_bytes;
+ unsigned int count_wr;
+ 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;
+};
+
struct ipoctal {
struct list_head list;
struct ipack_device *dev;
unsigned int board_id;
- union scc2698_channel __iomem *chan_regs;
- union scc2698_block __iomem *block_regs;
- struct ipoctal_stats chan_stats[NR_CHANNELS];
- unsigned int nb_bytes[NR_CHANNELS];
- unsigned int count_wr[NR_CHANNELS];
- wait_queue_head_t queue[NR_CHANNELS];
- spinlock_t lock[NR_CHANNELS];
- unsigned int pointer_read[NR_CHANNELS];
- unsigned int pointer_write[NR_CHANNELS];
- atomic_t open[NR_CHANNELS];
+ struct ipoctal_channel channel[NR_CHANNELS];
unsigned char write;
- struct tty_port tty_port[NR_CHANNELS];
struct tty_driver *tty_drv;
};

@@ -87,7 +91,7 @@ static struct ipoctal *ipoctal_find_board(struct tty_struct *tty)
static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty)
{
struct ipoctal *ipoctal;
- int channel = tty->index;
+ struct ipoctal_channel *channel;

ipoctal = ipoctal_find_board(tty);

@@ -96,17 +100,18 @@ static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty)
tty->driver->major);
return -ENODEV;
}
+ channel = &ipoctal->channel[tty->index];

- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.cr,
CR_ENABLE_RX);
return 0;
}

static int ipoctal_open(struct tty_struct *tty, struct file *file)
{
- int channel = tty->index;
int res;
struct ipoctal *ipoctal;
+ struct ipoctal_channel *channel;

ipoctal = ipoctal_find_board(tty);

@@ -115,17 +120,18 @@ static int ipoctal_open(struct tty_struct *tty, struct file *file)
tty->driver->major);
return -ENODEV;
}
+ channel = &ipoctal->channel[tty->index];

- if (atomic_read(&ipoctal->open[channel]))
+ if (atomic_read(&channel->open))
return -EBUSY;

tty->driver_data = ipoctal;

- res = tty_port_open(&ipoctal->tty_port[channel], tty, file);
+ res = tty_port_open(&channel->tty_port, tty, file);
if (res)
return res;

- atomic_inc(&ipoctal->open[channel]);
+ atomic_inc(&channel->open);
return 0;
}

@@ -141,26 +147,27 @@ static void ipoctal_reset_stats(struct ipoctal_stats *stats)

static void ipoctal_free_channel(struct tty_struct *tty)
{
- int channel = tty->index;
struct ipoctal *ipoctal = tty->driver_data;
+ struct ipoctal_channel *channel;

if (ipoctal == NULL)
return;
+ channel = &ipoctal->channel[tty->index];

- ipoctal_reset_stats(&ipoctal->chan_stats[channel]);
- ipoctal->pointer_read[channel] = 0;
- ipoctal->pointer_write[channel] = 0;
- ipoctal->nb_bytes[channel] = 0;
+ 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)
{
- int channel = tty->index;
struct ipoctal *ipoctal = tty->driver_data;
+ struct ipoctal_channel *channel = &ipoctal->channel[tty->index];

- tty_port_close(&ipoctal->tty_port[channel], tty, filp);
+ tty_port_close(&channel->tty_port, tty, filp);

- if (atomic_dec_and_test(&ipoctal->open[channel]))
+ if (atomic_dec_and_test(&channel->open))
ipoctal_free_channel(tty);
}

@@ -168,24 +175,23 @@ static int ipoctal_get_icount(struct tty_struct *tty,
struct serial_icounter_struct *icount)
{
struct ipoctal *ipoctal = tty->driver_data;
- int channel = tty->index;
+ struct ipoctal_channel *channel = &ipoctal->channel[tty->index];

icount->cts = 0;
icount->dsr = 0;
icount->rng = 0;
icount->dcd = 0;
- icount->rx = ipoctal->chan_stats[channel].rx;
- icount->tx = ipoctal->chan_stats[channel].tx;
- icount->frame = ipoctal->chan_stats[channel].framing_err;
- icount->parity = ipoctal->chan_stats[channel].parity_err;
- icount->brk = ipoctal->chan_stats[channel].rcv_break;
+ 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 int ipoctal_irq_handler(void *arg)
{
- unsigned int channel;
- unsigned int block;
+ unsigned int ichannel;
unsigned char isr;
unsigned char sr;
unsigned char isr_tx_rdy, isr_rx_rdy;
@@ -193,14 +199,16 @@ static int ipoctal_irq_handler(void *arg)
unsigned char flag;
struct tty_struct *tty;
struct ipoctal *ipoctal = (struct ipoctal *) arg;
+ struct ipoctal_channel *channel;

/* Check all channels */
- for (channel = 0; channel < NR_CHANNELS; channel++) {
+ for (ichannel = 0; ichannel < NR_CHANNELS; ichannel++) {
+ channel = &ipoctal->channel[ichannel];
/* If there is no client, skip the check */
- if (!atomic_read(&ipoctal->open[channel]))
+ if (!atomic_read(&channel->open))
continue;

- tty = tty_port_tty_get(&ipoctal->tty_port[channel]);
+ tty = tty_port_tty_get(&channel->tty_port);
if (!tty)
continue;

@@ -208,13 +216,12 @@ static int ipoctal_irq_handler(void *arg)
* The HW is organized in pair of channels.
* See which register we need to read from
*/
- block = channel / 2;
isr = ipoctal_read_io_reg(ipoctal,
- &ipoctal->block_regs[block].r.isr);
+ &channel->block_regs->r.isr);
sr = ipoctal_read_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].r.sr);
+ &channel->regs->r.sr);

- if ((channel % 2) == 1) {
+ if ((ichannel % 2) == 1) {
isr_tx_rdy = isr & ISR_TxRDY_B;
isr_rx_rdy = isr & ISR_RxRDY_FFULL_B;
} else {
@@ -227,47 +234,47 @@ static int ipoctal_irq_handler(void *arg)
*/
if ((ipoctal->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) &&
(sr & SR_TX_EMPTY) &&
- (ipoctal->nb_bytes[channel] == 0)) {
+ (channel->nb_bytes == 0)) {
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_DISABLE_TX);
ipoctal_write_cr_cmd(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_CMD_NEGATE_RTSN);
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_ENABLE_RX);
ipoctal->write = 1;
- wake_up_interruptible(&ipoctal->queue[channel]);
+ wake_up_interruptible(&channel->queue);
}

/* RX data */
if (isr_rx_rdy && (sr & SR_RX_READY)) {
value = ipoctal_read_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].r.rhr);
+ &channel->regs->r.rhr);
flag = TTY_NORMAL;

/* Error: count statistics */
if (sr & SR_ERROR) {
ipoctal_write_cr_cmd(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_CMD_RESET_ERR_STATUS);

if (sr & SR_OVERRUN_ERROR) {
- ipoctal->chan_stats[channel].overrun_err++;
+ channel->stats.overrun_err++;
/* Overrun doesn't affect the current character*/
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
}
if (sr & SR_PARITY_ERROR) {
- ipoctal->chan_stats[channel].parity_err++;
+ channel->stats.parity_err++;
flag = TTY_PARITY;
}
if (sr & SR_FRAMING_ERROR) {
- ipoctal->chan_stats[channel].framing_err++;
+ channel->stats.framing_err++;
flag = TTY_FRAME;
}
if (sr & SR_RECEIVED_BREAK) {
- ipoctal->chan_stats[channel].rcv_break++;
+ channel->stats.rcv_break++;
flag = TTY_BREAK;
}
}
@@ -277,30 +284,29 @@ static int ipoctal_irq_handler(void *arg)

/* TX of each character */
if (isr_tx_rdy && (sr & SR_TX_READY)) {
- unsigned int *pointer_write =
- &ipoctal->pointer_write[channel];
+ unsigned int *pointer_write = &channel->pointer_write;

- if (ipoctal->nb_bytes[channel] <= 0) {
- ipoctal->nb_bytes[channel] = 0;
+ if (channel->nb_bytes <= 0) {
+ channel->nb_bytes = 0;
continue;
}

- value = ipoctal->tty_port[channel].xmit_buf[*pointer_write];
+ value = channel->tty_port.xmit_buf[*pointer_write];
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].w.thr,
+ &channel->regs->w.thr,
value);
- ipoctal->chan_stats[channel].tx++;
- ipoctal->count_wr[channel]++;
+ channel->stats.tx++;
+ channel->count_wr++;
(*pointer_write)++;
*pointer_write = *pointer_write % PAGE_SIZE;
- ipoctal->nb_bytes[channel]--;
+ channel->nb_bytes--;

- if ((ipoctal->nb_bytes[channel] == 0) &&
- (waitqueue_active(&ipoctal->queue[channel]))) {
+ if ((channel->nb_bytes == 0) &&
+ (waitqueue_active(&channel->queue))) {

if (ipoctal->board_id != IPACK1_DEVICE_ID_SBS_OCTAL_485) {
ipoctal->write = 1;
- wake_up_interruptible(&ipoctal->queue[channel]);
+ wake_up_interruptible(&channel->queue);
}
}
}
@@ -348,6 +354,9 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
struct tty_driver *tty;
char name[20];
unsigned char board_id;
+ struct ipoctal_channel *channel;
+ union scc2698_channel __iomem *chan_regs;
+ union scc2698_block __iomem *block_regs;

res = ipoctal->dev->bus->ops->map_space(ipoctal->dev, 0,
IPACK_ID_SPACE);
@@ -385,41 +394,45 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
}

/* Save the virtual address to access the registers easily */
- ipoctal->chan_regs =
+ chan_regs =
(union scc2698_channel __iomem *) ipoctal->dev->io_space.address;
- ipoctal->block_regs =
+ block_regs =
(union scc2698_block __iomem *) ipoctal->dev->io_space.address;

/* Disable RX and TX before touching anything */
for (i = 0; i < NR_CHANNELS ; i++) {
- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[i].w.cr,
+ struct ipoctal_channel *channel = &ipoctal->channel[i];
+ channel->regs = chan_regs + i;
+ channel->block_regs = block_regs + (i >> 1);
+
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.cr,
CR_DISABLE_RX | CR_DISABLE_TX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[i].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_RX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[i].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_TX);
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[i].w.mr,
+ &channel->regs->w.mr,
MR1_CHRL_8_BITS | MR1_ERROR_CHAR |
MR1_RxINT_RxRDY); /* mr1 */
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[i].w.mr,
+ &channel->regs->w.mr,
0); /* mr2 */
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[i].w.csr,
+ &channel->regs->w.csr,
TX_CLK_9600 | RX_CLK_9600);
}

for (i = 0; i < IP_OCTAL_NB_BLOCKS; i++) {
ipoctal_write_io_reg(ipoctal,
- &ipoctal->block_regs[i].w.acr,
+ &block_regs[i].w.acr,
ACR_BRG_SET2);
ipoctal_write_io_reg(ipoctal,
- &ipoctal->block_regs[i].w.opcr,
+ &block_regs[i].w.opcr,
OPCR_MPP_OUTPUT | OPCR_MPOa_RTSN |
OPCR_MPOb_RTSN);
ipoctal_write_io_reg(ipoctal,
- &ipoctal->block_regs[i].w.imr,
+ &block_regs[i].w.imr,
IMR_TxRDY_A | IMR_RxRDY_FFULL_A |
IMR_DELTA_BREAK_A | IMR_TxRDY_B |
IMR_RxRDY_FFULL_B | IMR_DELTA_BREAK_B);
@@ -472,25 +485,26 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
ipoctal->tty_drv = tty;

for (i = 0; i < NR_CHANNELS; i++) {
- tty_port_init(&ipoctal->tty_port[i]);
- tty_port_alloc_xmit_buf(&ipoctal->tty_port[i]);
- ipoctal->tty_port[i].ops = &ipoctal_tty_port_ops;
-
- ipoctal_reset_stats(&ipoctal->chan_stats[i]);
- ipoctal->nb_bytes[i] = 0;
- init_waitqueue_head(&ipoctal->queue[i]);
-
- spin_lock_init(&ipoctal->lock[i]);
- ipoctal->pointer_read[i] = 0;
- ipoctal->pointer_write[i] = 0;
- ipoctal->nb_bytes[i] = 0;
+ 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;
+ channel->nb_bytes = 0;
tty_register_device(tty, i, NULL);

/*
* Enable again the RX. TX will be enabled when
* there is something to send
*/
- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[i].w.cr,
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.cr,
CR_ENABLE_RX);
}

@@ -505,23 +519,22 @@ out_unregister_id_space:
return res;
}

-static inline int ipoctal_copy_write_buffer(struct ipoctal *ipoctal,
- unsigned int channel,
+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 = &ipoctal->pointer_read[channel];
+ 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 - ipoctal->nb_bytes[channel])) {
- spin_lock_irqsave(&ipoctal->lock[channel], flags);
- ipoctal->tty_port[channel].xmit_buf[*pointer_read] = buf[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;
- ipoctal->nb_bytes[channel]++;
- spin_unlock_irqrestore(&ipoctal->lock[channel], flags);
+ channel->nb_bytes++;
+ spin_unlock_irqrestore(&channel->lock, flags);
} else {
break;
}
@@ -529,21 +542,22 @@ static inline int ipoctal_copy_write_buffer(struct ipoctal *ipoctal,
return i;
}

-static int ipoctal_write(struct ipoctal *ipoctal, unsigned int channel,
+static int ipoctal_write(struct ipoctal *ipoctal, unsigned int ichannel,
const unsigned char *buf, int count)
{
- ipoctal->nb_bytes[channel] = 0;
- ipoctal->count_wr[channel] = 0;
+ struct ipoctal_channel *channel = &ipoctal->channel[ichannel];
+ channel->nb_bytes = 0;
+ channel->count_wr = 0;

- ipoctal_copy_write_buffer(ipoctal, channel, buf, count);
+ ipoctal_copy_write_buffer(channel, buf, count);

/* As the IP-OCTAL 485 only supports half duplex, do it manually */
if (ipoctal->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_DISABLE_RX);
ipoctal_write_cr_cmd(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_CMD_ASSERT_RTSN);
}

@@ -552,40 +566,39 @@ static int ipoctal_write(struct ipoctal *ipoctal, unsigned int channel,
* operations
*/
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_ENABLE_TX);
- wait_event_interruptible(ipoctal->queue[channel], ipoctal->write);
+ wait_event_interruptible(channel->queue, ipoctal->write);
ipoctal_write_io_reg(ipoctal,
- &ipoctal->chan_regs[channel].w.cr,
+ &channel->regs->w.cr,
CR_DISABLE_TX);

ipoctal->write = 0;
- return ipoctal->count_wr[channel];
+ return channel->count_wr;
}

static int ipoctal_write_tty(struct tty_struct *tty,
const unsigned char *buf, int count)
{
- unsigned int channel = tty->index;
struct ipoctal *ipoctal = tty->driver_data;

- return ipoctal_write(ipoctal, channel, buf, count);
+ return ipoctal_write(ipoctal, tty->index, buf, count);
}

static int ipoctal_write_room(struct tty_struct *tty)
{
- int channel = tty->index;
struct ipoctal *ipoctal = tty->driver_data;
+ struct ipoctal_channel *channel = &ipoctal->channel[tty->index];

- return PAGE_SIZE - ipoctal->nb_bytes[channel];
+ return PAGE_SIZE - channel->nb_bytes;
}

static int ipoctal_chars_in_buffer(struct tty_struct *tty)
{
- int channel = tty->index;
struct ipoctal *ipoctal = tty->driver_data;
+ struct ipoctal_channel *channel = &ipoctal->channel[tty->index];

- return ipoctal->nb_bytes[channel];
+ return channel->nb_bytes;
}

static void ipoctal_set_termios(struct tty_struct *tty,
@@ -595,22 +608,22 @@ static void ipoctal_set_termios(struct tty_struct *tty,
unsigned char mr1 = 0;
unsigned char mr2 = 0;
unsigned char csr = 0;
- unsigned int channel = tty->index;
struct ipoctal *ipoctal = tty->driver_data;
+ struct ipoctal_channel *channel = &ipoctal->channel[tty->index];
speed_t baud;

cflag = tty->termios->c_cflag;

/* Disable and reset everything before change the setup */
- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.cr,
CR_DISABLE_RX | CR_DISABLE_TX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_RX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_TX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_ERR_STATUS);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_MR);

/* Set Bits per chars */
@@ -724,45 +737,45 @@ static void ipoctal_set_termios(struct tty_struct *tty,
mr1 |= MR1_RxINT_RxRDY;

/* Write the control registers */
- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].w.mr, mr1);
- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].w.mr, mr2);
- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].w.csr, csr);
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.mr, mr1);
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.mr, mr2);
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.csr, csr);

/* Enable again the RX */
- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.cr,
CR_ENABLE_RX);
}

static void ipoctal_hangup(struct tty_struct *tty)
{
unsigned long flags;
- int channel = tty->index;
struct ipoctal *ipoctal = tty->driver_data;
+ struct ipoctal_channel *channel = &ipoctal->channel[tty->index];

if (ipoctal == NULL)
return;

- spin_lock_irqsave(&ipoctal->lock[channel], flags);
- ipoctal->nb_bytes[channel] = 0;
- ipoctal->pointer_read[channel] = 0;
- ipoctal->pointer_write[channel] = 0;
- spin_unlock_irqrestore(&ipoctal->lock[channel], flags);
+ 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(&ipoctal->tty_port[channel]);
+ tty_port_hangup(&channel->tty_port);

- ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_io_reg(ipoctal, &channel->regs->w.cr,
CR_DISABLE_RX | CR_DISABLE_TX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_RX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_TX);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_ERR_STATUS);
- ipoctal_write_cr_cmd(ipoctal, &ipoctal->chan_regs[channel].w.cr,
+ ipoctal_write_cr_cmd(ipoctal, &channel->regs->w.cr,
CR_CMD_RESET_MR);

- clear_bit(ASYNCB_INITIALIZED, &ipoctal->tty_port[channel].flags);
- wake_up_interruptible(&ipoctal->tty_port[channel].open_wait);
+ clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);
+ wake_up_interruptible(&channel->tty_port.open_wait);
}

static const struct tty_operations ipoctal_fops = {
@@ -806,8 +819,9 @@ static void __ipoctal_remove(struct ipoctal *ipoctal)
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(&ipoctal->tty_port[i]);
+ tty_port_free_xmit_buf(&channel->tty_port);
}

tty_unregister_driver(ipoctal->tty_drv);
--
1.7.10.4


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