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cyclades: use dtr_rts helpers
For Z cards, use tty helpers for dtr_rts. If we did the same for Y cards, it will cause a deadlock, because cyy_dtr_rts takes a lock which we already hold. Instead, we introduce a Y helper expecting card lock to be held. It may then be called with set/clear masks from other places. 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
f6e208c111
commit
4d7682005c
1 changed files with 79 additions and 201 deletions
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@ -825,6 +825,66 @@ static irqreturn_t cyy_interrupt(int irq, void *dev_id)
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return IRQ_HANDLED;
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} /* cyy_interrupt */
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static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
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unsigned int clear)
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{
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struct cyclades_card *card = info->card;
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void __iomem *base_addr;
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int chip, channel, index;
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channel = info->line - card->first_line;
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chip = channel >> 2;
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channel &= 0x03;
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index = card->bus_index;
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base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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if (set & TIOCM_RTS) {
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cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
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if (info->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
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} else {
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cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
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}
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}
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if (clear & TIOCM_RTS) {
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cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
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if (info->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
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} else {
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cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
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}
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}
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if (set & TIOCM_DTR) {
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cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
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if (info->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
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} else {
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cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:set_modem_info raising 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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if (clear & TIOCM_DTR) {
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cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
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if (info->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
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} else {
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cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:set_modem_info dropping 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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}
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/***********************************************************/
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/********* End of block of Cyclom-Y specific code **********/
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/******** Start of block of Cyclades-Z specific code *******/
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@ -1290,16 +1350,7 @@ static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
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cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
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index);
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cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
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cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
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cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:startup raising 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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cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
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cy_writeb(base_addr + (CySRER << index),
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readb(base_addr + (CySRER << index)) | CyRxData);
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@ -1362,16 +1413,7 @@ static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
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/* set timeout !!! */
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/* set RTS and DTR !!! */
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cy_writel(&ch_ctrl->rs_control, readl(&ch_ctrl->rs_control) |
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C_RS_RTS | C_RS_DTR);
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retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
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if (retval != 0) {
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printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
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"%x\n", info->line, retval);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
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#endif
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tty_port_raise_dtr_rts(&info->port);
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/* enable send, recv, modem !!! */
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@ -1473,17 +1515,9 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
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info->port.xmit_buf = NULL;
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free_page((unsigned long)temp);
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}
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cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
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if (tty->termios->c_cflag & HUPCL) {
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cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
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cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc shutdown dropping 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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if (tty->termios->c_cflag & HUPCL)
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cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
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cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
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/* it may be appropriate to clear _XMIT at
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some later date (after testing)!!! */
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@ -1492,9 +1526,6 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
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info->port.flags &= ~ASYNC_INITIALIZED;
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spin_unlock_irqrestore(&card->card_lock, flags);
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} else {
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struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
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int retval;
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#ifdef CY_DEBUG_OPEN
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printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
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"base_addr %p\n", card, channel, card->base_addr);
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@ -1512,20 +1543,8 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
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free_page((unsigned long)temp);
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}
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if (tty->termios->c_cflag & HUPCL) {
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cy_writel(&ch_ctrl->rs_control,
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readl(&ch_ctrl->rs_control) &
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~(C_RS_RTS | C_RS_DTR));
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retval = cyz_issue_cmd(info->card, channel,
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C_CM_IOCTLM, 0L);
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if (retval != 0) {
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printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
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"was %x\n", info->line, retval);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
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#endif
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}
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if (tty->termios->c_cflag & HUPCL)
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tty_port_lower_dtr_rts(&info->port);
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set_bit(TTY_IO_ERROR, &tty->flags);
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info->port.flags &= ~ASYNC_INITIALIZED;
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@ -2273,35 +2292,10 @@ static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
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CyDSR | CyCTS | CyRI | CyDCD);
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}
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if (i == 0) { /* baud rate is zero, turn off line */
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if (info->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR1 << index),
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~CyRTS);
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} else {
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cy_writeb(base_addr + (CyMSVR2 << index),
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~CyDTR);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:set_line_char dropping 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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} else {
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if (info->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR1 << index),
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CyRTS);
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} else {
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cy_writeb(base_addr + (CyMSVR2 << index),
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CyDTR);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:set_line_char raising 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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if (i == 0) /* baud rate is zero, turn off line */
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cyy_change_rts_dtr(info, 0, TIOCM_DTR);
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else
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cyy_change_rts_dtr(info, TIOCM_DTR, 0);
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clear_bit(TTY_IO_ERROR, &tty->flags);
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spin_unlock_irqrestore(&card->card_lock, flags);
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@ -2604,9 +2598,8 @@ cy_tiocmset(struct tty_struct *tty, struct file *file,
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{
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struct cyclades_port *info = tty->driver_data;
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struct cyclades_card *card;
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int chip, channel, index;
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unsigned long flags;
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int retval;
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int channel, retval;
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if (serial_paranoia_check(info, tty->name, __func__))
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return -ENODEV;
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@ -2614,77 +2607,9 @@ cy_tiocmset(struct tty_struct *tty, struct file *file,
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card = info->card;
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channel = (info->line) - (card->first_line);
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if (!cy_is_Z(card)) {
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void __iomem *base_addr;
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chip = channel >> 2;
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channel &= 0x03;
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index = card->bus_index;
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base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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if (set & TIOCM_RTS) {
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spin_lock_irqsave(&card->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->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR2 << index),
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CyDTR);
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} else {
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cy_writeb(base_addr + (CyMSVR1 << index),
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CyRTS);
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}
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cyy_change_rts_dtr(info, set, clear);
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spin_unlock_irqrestore(&card->card_lock, flags);
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}
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if (clear & TIOCM_RTS) {
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spin_lock_irqsave(&card->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->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR2 << index),
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~CyDTR);
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} else {
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cy_writeb(base_addr + (CyMSVR1 << index),
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~CyRTS);
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}
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spin_unlock_irqrestore(&card->card_lock, flags);
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}
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if (set & TIOCM_DTR) {
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spin_lock_irqsave(&card->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->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR1 << index),
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CyRTS);
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} else {
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cy_writeb(base_addr + (CyMSVR2 << index),
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CyDTR);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:set_modem_info raising 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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spin_unlock_irqrestore(&card->card_lock, flags);
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}
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if (clear & TIOCM_DTR) {
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spin_lock_irqsave(&card->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->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR1 << index),
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~CyRTS);
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} else {
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cy_writeb(base_addr + (CyMSVR2 << index),
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~CyDTR);
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}
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#ifdef CY_DEBUG_DTR
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printk(KERN_DEBUG "cyc:set_modem_info dropping 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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spin_unlock_irqrestore(&card->card_lock, flags);
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}
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} else {
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if (cyz_is_loaded(card)) {
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struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
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@ -3177,8 +3102,6 @@ static void cy_throttle(struct tty_struct *tty)
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struct cyclades_port *info = tty->driver_data;
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struct cyclades_card *card;
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unsigned long flags;
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void __iomem *base_addr;
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int chip, channel, index;
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#ifdef CY_DEBUG_THROTTLE
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char buf[64];
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@ -3200,24 +3123,9 @@ static void cy_throttle(struct tty_struct *tty)
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}
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if (tty->termios->c_cflag & CRTSCTS) {
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channel = info->line - card->first_line;
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if (!cy_is_Z(card)) {
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chip = channel >> 2;
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channel &= 0x03;
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index = card->bus_index;
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base_addr = card->base_addr +
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(cy_chip_offset[chip] << index);
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spin_lock_irqsave(&card->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->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR2 << index),
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~CyDTR);
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} else {
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cy_writeb(base_addr + (CyMSVR1 << index),
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~CyRTS);
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}
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cyy_change_rts_dtr(info, 0, TIOCM_RTS);
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spin_unlock_irqrestore(&card->card_lock, flags);
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} else {
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info->throttle = 1;
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@ -3235,8 +3143,6 @@ static void cy_unthrottle(struct tty_struct *tty)
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struct cyclades_port *info = tty->driver_data;
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struct cyclades_card *card;
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unsigned long flags;
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void __iomem *base_addr;
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int chip, channel, index;
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#ifdef CY_DEBUG_THROTTLE
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char buf[64];
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@ -3257,24 +3163,9 @@ static void cy_unthrottle(struct tty_struct *tty)
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if (tty->termios->c_cflag & CRTSCTS) {
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card = info->card;
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channel = info->line - card->first_line;
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if (!cy_is_Z(card)) {
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chip = channel >> 2;
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channel &= 0x03;
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index = card->bus_index;
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base_addr = card->base_addr +
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(cy_chip_offset[chip] << index);
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spin_lock_irqsave(&card->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->rtsdtr_inv) {
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cy_writeb(base_addr + (CyMSVR2 << index),
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CyDTR);
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} else {
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cy_writeb(base_addr + (CyMSVR1 << index),
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CyRTS);
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}
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cyy_change_rts_dtr(info, TIOCM_RTS, 0);
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spin_unlock_irqrestore(&card->card_lock, flags);
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} else {
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info->throttle = 0;
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@ -3395,24 +3286,11 @@ static void cyy_dtr_rts(struct tty_port *port, int raise)
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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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cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
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raise ? 0 : TIOCM_RTS | TIOCM_DTR);
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spin_unlock_irqrestore(&cinfo->card_lock, flags);
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}
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