From: Jens Taprogge Date: Wed, 12 Sep 2012 12:55:28 +0000 (+0200) Subject: Staging: ipack/devices/ipoctal: put ipoctal_channel into tty->driver_data. X-Git-Tag: next-20120913~25^2~18 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ef79de031437ead308093289604eeb3b5b9d924f;p=karo-tx-linux.git 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 Signed-off-by: Samuel Iglesias Gonsalvez Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c index c963456ad8b7..70dc7a236d49 100644 --- a/drivers/staging/ipack/devices/ipoctal.c +++ b/drivers/staging/ipack/devices/ipoctal.c @@ -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);