forked from Minki/linux
cyclades: remove block_til_ready
Use a tty_port common instead. This saves lots of .text and makes the code a lot more readable. This involves separation of a dtr_rts handling, next patches will use that to not duplicate the code all over the place. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Slaby
Live-CD User
parent
d13549f804
commit
f073757942
@ -2172,199 +2172,6 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
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* ------------------------------------------------------------
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*/
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static int
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block_til_ready(struct tty_struct *tty, struct file *filp,
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struct cyclades_port *info)
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{
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DECLARE_WAITQUEUE(wait, current);
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struct cyclades_card *cinfo;
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unsigned long flags;
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int chip, channel, index;
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int retval;
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void __iomem *base_addr;
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cinfo = info->card;
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channel = info->line - cinfo->first_line;
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/*
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* If the device is in the middle of being closed, then block
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* until it's done, and then try again.
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*/
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if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
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wait_event_interruptible(info->port.close_wait,
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!(info->port.flags & ASYNC_CLOSING));
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return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
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}
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/*
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* If non-blocking mode is set, then make the check up front
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* and then exit.
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*/
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if ((filp->f_flags & O_NONBLOCK) ||
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(tty->flags & (1 << TTY_IO_ERROR))) {
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info->port.flags |= ASYNC_NORMAL_ACTIVE;
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return 0;
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}
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/*
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* Block waiting for the carrier detect and the line to become
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* free (i.e., not in use by the callout). While we are in
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* this loop, info->port.count is dropped by one, so that
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* cy_close() knows when to free things. We restore it upon
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* exit, either normal or abnormal.
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*/
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retval = 0;
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add_wait_queue(&info->port.open_wait, &wait);
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#ifdef CY_DEBUG_OPEN
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printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
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"count = %d\n", info->line, info->port.count);
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#endif
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spin_lock_irqsave(&cinfo->card_lock, flags);
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if (!tty_hung_up_p(filp))
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info->port.count--;
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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#ifdef CY_DEBUG_COUNT
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printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
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"%d\n", current->pid, info->port.count);
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#endif
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info->port.blocked_open++;
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if (!cy_is_Z(cinfo)) {
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chip = channel >> 2;
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channel &= 0x03;
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index = cinfo->bus_index;
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base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
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while (1) {
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spin_lock_irqsave(&cinfo->card_lock, flags);
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if ((tty->termios->c_cflag & CBAUD)) {
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cy_writeb(base_addr + (CyCAR << index),
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(u_char) channel);
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cy_writeb(base_addr + (CyMSVR1 << index),
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CyRTS);
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cy_writeb(base_addr + (CyMSVR2 << index),
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CyDTR);
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:block_til_ready raising "
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"DTR\n");
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printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
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readb(base_addr + (CyMSVR1 << index)),
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readb(base_addr + (CyMSVR2 << index)));
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#endif
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}
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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set_current_state(TASK_INTERRUPTIBLE);
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if (tty_hung_up_p(filp) ||
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!(info->port.flags & ASYNC_INITIALIZED)) {
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retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
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-EAGAIN : -ERESTARTSYS);
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break;
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}
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spin_lock_irqsave(&cinfo->card_lock, flags);
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cy_writeb(base_addr + (CyCAR << index),
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(u_char) channel);
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if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
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(readb(base_addr +
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(CyMSVR1 << index)) & CyDCD))) {
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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break;
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}
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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if (signal_pending(current)) {
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retval = -ERESTARTSYS;
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break;
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}
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#ifdef CY_DEBUG_OPEN
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printk(KERN_DEBUG "cyc block_til_ready blocking: "
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"ttyC%d, count = %d\n",
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info->line, info->port.count);
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#endif
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schedule();
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}
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} else {
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struct FIRM_ID __iomem *firm_id;
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struct ZFW_CTRL __iomem *zfw_ctrl;
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struct BOARD_CTRL __iomem *board_ctrl;
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struct CH_CTRL __iomem *ch_ctrl;
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base_addr = cinfo->base_addr;
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firm_id = base_addr + ID_ADDRESS;
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if (!cyz_is_loaded(cinfo)) {
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__set_current_state(TASK_RUNNING);
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remove_wait_queue(&info->port.open_wait, &wait);
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return -EINVAL;
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}
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zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
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& 0xfffff);
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board_ctrl = &zfw_ctrl->board_ctrl;
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ch_ctrl = zfw_ctrl->ch_ctrl;
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while (1) {
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if ((tty->termios->c_cflag & CBAUD)) {
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cy_writel(&ch_ctrl[channel].rs_control,
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readl(&ch_ctrl[channel].rs_control) |
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C_RS_RTS | C_RS_DTR);
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retval = cyz_issue_cmd(cinfo,
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channel, C_CM_IOCTLM, 0L);
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if (retval != 0) {
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printk(KERN_ERR "cyc:block_til_ready "
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"retval on ttyC%d was %x\n",
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info->line, retval);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:block_til_ready raising "
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"Z DTR\n");
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#endif
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}
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set_current_state(TASK_INTERRUPTIBLE);
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if (tty_hung_up_p(filp) ||
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!(info->port.flags & ASYNC_INITIALIZED)) {
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retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
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-EAGAIN : -ERESTARTSYS);
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break;
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}
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if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
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(readl(&ch_ctrl[channel].rs_status) &
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C_RS_DCD))) {
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break;
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}
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if (signal_pending(current)) {
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retval = -ERESTARTSYS;
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break;
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}
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#ifdef CY_DEBUG_OPEN
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printk(KERN_DEBUG "cyc block_til_ready blocking: "
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"ttyC%d, count = %d\n",
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info->line, info->port.count);
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#endif
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schedule();
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}
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}
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__set_current_state(TASK_RUNNING);
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remove_wait_queue(&info->port.open_wait, &wait);
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if (!tty_hung_up_p(filp)) {
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info->port.count++;
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#ifdef CY_DEBUG_COUNT
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printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
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"count to %d\n", current->pid, info->port.count);
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#endif
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}
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info->port.blocked_open--;
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#ifdef CY_DEBUG_OPEN
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printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
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"count = %d\n", info->line, info->port.count);
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#endif
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if (retval)
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return retval;
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info->port.flags |= ASYNC_NORMAL_ACTIVE;
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return 0;
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} /* block_til_ready */
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/*
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* This routine is called whenever a serial port is opened. It
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* performs the serial-specific initialization for the tty structure.
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@ -2472,7 +2279,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp)
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if (retval)
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return retval;
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retval = block_til_ready(tty, filp, info);
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retval = tty_port_block_til_ready(&info->port, tty, filp);
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if (retval) {
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#ifdef CY_DEBUG_OPEN
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printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
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@ -4312,6 +4119,111 @@ static void cy_hangup(struct tty_struct *tty)
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wake_up_interruptible(&info->port.open_wait);
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} /* cy_hangup */
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static int cyy_carrier_raised(struct tty_port *port)
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{
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struct cyclades_port *info = container_of(port, struct cyclades_port,
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port);
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struct cyclades_card *cinfo = info->card;
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void __iomem *base = cinfo->base_addr;
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unsigned long flags;
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int channel = info->line - cinfo->first_line;
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int chip = channel >> 2, index = cinfo->bus_index;
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u32 cd;
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channel &= 0x03;
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base += cy_chip_offset[chip] << index;
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spin_lock_irqsave(&cinfo->card_lock, flags);
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cy_writeb(base + (CyCAR << index), (u8)channel);
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cd = readb(base + (CyMSVR1 << index)) & CyDCD;
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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return cd;
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}
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static void cyy_dtr_rts(struct tty_port *port, int raise)
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{
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struct cyclades_port *info = container_of(port, struct cyclades_port,
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port);
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struct cyclades_card *cinfo = info->card;
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void __iomem *base = cinfo->base_addr;
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unsigned long flags;
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int channel = info->line - cinfo->first_line;
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int chip = channel >> 2, index = cinfo->bus_index;
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channel &= 0x03;
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base += cy_chip_offset[chip] << index;
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spin_lock_irqsave(&cinfo->card_lock, flags);
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cy_writeb(base + (CyCAR << index), (u8)channel);
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cy_writeb(base + (CyMSVR1 << index), raise ? CyRTS : ~CyRTS);
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cy_writeb(base + (CyMSVR2 << index), raise ? CyDTR : ~CyDTR);
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "%s: raising DTR\n", __func__);
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printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
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readb(base + (CyMSVR1 << index)),
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readb(base + (CyMSVR2 << index)));
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#endif
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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}
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static int cyz_carrier_raised(struct tty_port *port)
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{
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struct cyclades_port *info = container_of(port, struct cyclades_port,
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port);
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struct cyclades_card *cinfo = info->card;
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void __iomem *base = cinfo->base_addr;
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struct FIRM_ID __iomem *firm_id = base + ID_ADDRESS;
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struct ZFW_CTRL __iomem *zfw_ctrl;
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struct CH_CTRL __iomem *ch_ctrl;
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int channel = info->line - cinfo->first_line;
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zfw_ctrl = base + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
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ch_ctrl = zfw_ctrl->ch_ctrl;
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return readl(&ch_ctrl[channel].rs_status) & C_RS_DCD;
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}
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static void cyz_dtr_rts(struct tty_port *port, int raise)
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{
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struct cyclades_port *info = container_of(port, struct cyclades_port,
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port);
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struct cyclades_card *cinfo = info->card;
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void __iomem *base = cinfo->base_addr;
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struct FIRM_ID __iomem *firm_id = base + ID_ADDRESS;
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struct ZFW_CTRL __iomem *zfw_ctrl;
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struct CH_CTRL __iomem *ch_ctrl;
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int ret, channel = info->line - cinfo->first_line;
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u32 rs;
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zfw_ctrl = base + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
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ch_ctrl = zfw_ctrl->ch_ctrl;
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rs = readl(&ch_ctrl[channel].rs_control);
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if (raise)
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rs |= C_RS_RTS | C_RS_DTR;
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else
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rs &= ~(C_RS_RTS | C_RS_DTR);
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cy_writel(&ch_ctrl[channel].rs_control, rs);
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ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
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if (ret != 0)
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printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
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__func__, info->line, ret);
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
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#endif
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}
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static const struct tty_port_operations cyy_port_ops = {
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.carrier_raised = cyy_carrier_raised,
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.dtr_rts = cyy_dtr_rts,
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};
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static const struct tty_port_operations cyz_port_ops = {
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.carrier_raised = cyz_carrier_raised,
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.dtr_rts = cyz_dtr_rts,
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};
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/*
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* ---------------------------------------------------------------------
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* cy_init() and friends
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@ -4351,6 +4263,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo)
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init_waitqueue_head(&info->delta_msr_wait);
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if (cy_is_Z(cinfo)) {
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info->port.ops = &cyz_port_ops;
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info->type = PORT_STARTECH;
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if (cinfo->hw_ver == ZO_V1)
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info->xmit_fifo_size = CYZ_FIFO_SIZE;
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@ -4362,6 +4275,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo)
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#endif
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} else {
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int index = cinfo->bus_index;
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info->port.ops = &cyy_port_ops;
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info->type = PORT_CIRRUS;
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info->xmit_fifo_size = CyMAX_CHAR_FIFO;
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info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
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