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Staging: ipack/devices/ipoctal: put ipoctal_channel into tty->driver_data. 

Each tty's driver_data is now pointing to the channel it is talking to.  struct
ipoctal_channel contains all the information the callbacks require to do their
work.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Taprogge 2012-09-12 14:55:28 +02:00 committed by Greg Kroah-Hartman
parent 459e6d7c93
commit ef79de0314
1 changed files with 21 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/staging/ipack/devices/ipoctal.c
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@ -42,6 +42,8 @@ struct ipoctal_channel {
struct tty_port tty_port;
union scc2698_channel __iomem *regs;
union scc2698_block __iomem *block_regs;
unsigned int board_id;
unsigned char *board_write;
};
struct ipoctal {
@ -104,7 +106,7 @@ static int ipoctal_open(struct tty_struct *tty, struct file *file)
if (atomic_read(&channel->open))
return -EBUSY;
tty->driver_data = ipoctal;
tty->driver_data = channel;
res = tty_port_open(&channel->tty_port, tty, file);
if (res)
@ -124,15 +126,8 @@ static void ipoctal_reset_stats(struct ipoctal_stats *stats)
stats->parity_err = 0;
}
static void ipoctal_free_channel(struct tty_struct *tty)
static void ipoctal_free_channel(struct ipoctal_channel *channel)
{
struct ipoctal *ipoctal = tty->driver_data;
struct ipoctal_channel *channel;
if (ipoctal == NULL)
return;
channel = &ipoctal->channel[tty->index];
ipoctal_reset_stats(&channel->stats);
channel->pointer_read = 0;
channel->pointer_write = 0;
@ -141,20 +136,18 @@ static void ipoctal_free_channel(struct tty_struct *tty)
static void ipoctal_close(struct tty_struct *tty, struct file *filp)
{
struct ipoctal *ipoctal = tty->driver_data;
struct ipoctal_channel *channel = &ipoctal->channel[tty->index];
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(tty);
ipoctal_free_channel(channel);
}
static int ipoctal_get_icount(struct tty_struct *tty,
struct serial_icounter_struct *icount)
{
struct ipoctal *ipoctal = tty->driver_data;
struct ipoctal_channel *channel = &ipoctal->channel[tty->index];
struct ipoctal_channel *channel = tty->driver_data;
icount->cts = 0;
icount->dsr = 0;
@ -370,6 +363,8 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
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;
iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
@ -492,17 +487,16 @@ static inline int ipoctal_copy_write_buffer(struct ipoctal_channel *channel,
return i;
}
static int ipoctal_write(struct ipoctal *ipoctal, unsigned int ichannel,
static int ipoctal_write(struct ipoctal_channel *channel,
const unsigned char *buf, int count)
{
struct ipoctal_channel *channel = &ipoctal->channel[ichannel];
channel->nb_bytes = 0;
channel->count_wr = 0;
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) {
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);
}
@ -512,33 +506,31 @@ static int ipoctal_write(struct ipoctal *ipoctal, unsigned int ichannel,
* operations
*/
iowrite8(CR_ENABLE_TX, &channel->regs->w.cr);
wait_event_interruptible(channel->queue, ipoctal->write);
wait_event_interruptible(channel->queue, *channel->board_write);
iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
ipoctal->write = 0;
*channel->board_write = 0;
return channel->count_wr;
}
static int ipoctal_write_tty(struct tty_struct *tty,
const unsigned char *buf, int count)
{
struct ipoctal *ipoctal = tty->driver_data;
struct ipoctal_channel *channel = tty->driver_data;
return ipoctal_write(ipoctal, tty->index, buf, count);
return ipoctal_write(channel, buf, count);
}
static int ipoctal_write_room(struct tty_struct *tty)
{
struct ipoctal *ipoctal = tty->driver_data;
struct ipoctal_channel *channel = &ipoctal->channel[tty->index];
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 *ipoctal = tty->driver_data;
struct ipoctal_channel *channel = &ipoctal->channel[tty->index];
struct ipoctal_channel *channel = tty->driver_data;
return channel->nb_bytes;
}
@ -550,8 +542,7 @@ static void ipoctal_set_termios(struct tty_struct *tty,
unsigned char mr1 = 0;
unsigned char mr2 = 0;
unsigned char csr = 0;
struct ipoctal *ipoctal = tty->driver_data;
struct ipoctal_channel *channel = &ipoctal->channel[tty->index];
struct ipoctal_channel *channel = tty->driver_data;
speed_t baud;
cflag = tty->termios->c_cflag;
@ -598,7 +589,7 @@ static void ipoctal_set_termios(struct tty_struct *tty,
mr2 |= MR2_STOP_BITS_LENGTH_1;
/* Set the flow control */
switch (ipoctal->board_id) {
switch (channel->board_id) {
case IPACK1_DEVICE_ID_SBS_OCTAL_232:
if (cflag & CRTSCTS) {
mr1 |= MR1_RxRTS_CONTROL_ON;
@ -685,10 +676,9 @@ static void ipoctal_set_termios(struct tty_struct *tty,
static void ipoctal_hangup(struct tty_struct *tty)
{
unsigned long flags;
struct ipoctal *ipoctal = tty->driver_data;
struct ipoctal_channel *channel = &ipoctal->channel[tty->index];
struct ipoctal_channel *channel = tty->driver_data;
if (ipoctal == NULL)
if (channel == NULL)
return;
spin_lock_irqsave(&channel->lock, flags);