mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-10-31 16:54:21 +00:00
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
1 changed files with 108 additions and 194 deletions
|
|
@ -2172,199 +2172,6 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
|
|||
* ------------------------------------------------------------
|
||||
*/
|
||||
|
||||
static int
|
||||
block_til_ready(struct tty_struct *tty, struct file *filp,
|
||||
struct cyclades_port *info)
|
||||
{
|
||||
DECLARE_WAITQUEUE(wait, current);
|
||||
struct cyclades_card *cinfo;
|
||||
unsigned long flags;
|
||||
int chip, channel, index;
|
||||
int retval;
|
||||
void __iomem *base_addr;
|
||||
|
||||
cinfo = info->card;
|
||||
channel = info->line - cinfo->first_line;
|
||||
|
||||
/*
|
||||
* If the device is in the middle of being closed, then block
|
||||
* until it's done, and then try again.
|
||||
*/
|
||||
if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
|
||||
wait_event_interruptible(info->port.close_wait,
|
||||
!(info->port.flags & ASYNC_CLOSING));
|
||||
return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
|
||||
}
|
||||
|
||||
/*
|
||||
* If non-blocking mode is set, then make the check up front
|
||||
* and then exit.
|
||||
*/
|
||||
if ((filp->f_flags & O_NONBLOCK) ||
|
||||
(tty->flags & (1 << TTY_IO_ERROR))) {
|
||||
info->port.flags |= ASYNC_NORMAL_ACTIVE;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Block waiting for the carrier detect and the line to become
|
||||
* free (i.e., not in use by the callout). While we are in
|
||||
* this loop, info->port.count is dropped by one, so that
|
||||
* cy_close() knows when to free things. We restore it upon
|
||||
* exit, either normal or abnormal.
|
||||
*/
|
||||
retval = 0;
|
||||
add_wait_queue(&info->port.open_wait, &wait);
|
||||
#ifdef CY_DEBUG_OPEN
|
||||
printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
|
||||
"count = %d\n", info->line, info->port.count);
|
||||
#endif
|
||||
spin_lock_irqsave(&cinfo->card_lock, flags);
|
||||
if (!tty_hung_up_p(filp))
|
||||
info->port.count--;
|
||||
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
||||
#ifdef CY_DEBUG_COUNT
|
||||
printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
|
||||
"%d\n", current->pid, info->port.count);
|
||||
#endif
|
||||
info->port.blocked_open++;
|
||||
|
||||
if (!cy_is_Z(cinfo)) {
|
||||
chip = channel >> 2;
|
||||
channel &= 0x03;
|
||||
index = cinfo->bus_index;
|
||||
base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
|
||||
|
||||
while (1) {
|
||||
spin_lock_irqsave(&cinfo->card_lock, flags);
|
||||
if ((tty->termios->c_cflag & CBAUD)) {
|
||||
cy_writeb(base_addr + (CyCAR << index),
|
||||
(u_char) channel);
|
||||
cy_writeb(base_addr + (CyMSVR1 << index),
|
||||
CyRTS);
|
||||
cy_writeb(base_addr + (CyMSVR2 << index),
|
||||
CyDTR);
|
||||
#ifdef CY_DEBUG_DTR
|
||||
printk(KERN_DEBUG "cyc:block_til_ready raising "
|
||||
"DTR\n");
|
||||
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
||||
readb(base_addr + (CyMSVR1 << index)),
|
||||
readb(base_addr + (CyMSVR2 << index)));
|
||||
#endif
|
||||
}
|
||||
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
if (tty_hung_up_p(filp) ||
|
||||
!(info->port.flags & ASYNC_INITIALIZED)) {
|
||||
retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
|
||||
-EAGAIN : -ERESTARTSYS);
|
||||
break;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&cinfo->card_lock, flags);
|
||||
cy_writeb(base_addr + (CyCAR << index),
|
||||
(u_char) channel);
|
||||
if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
|
||||
(readb(base_addr +
|
||||
(CyMSVR1 << index)) & CyDCD))) {
|
||||
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
||||
break;
|
||||
}
|
||||
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
||||
|
||||
if (signal_pending(current)) {
|
||||
retval = -ERESTARTSYS;
|
||||
break;
|
||||
}
|
||||
#ifdef CY_DEBUG_OPEN
|
||||
printk(KERN_DEBUG "cyc block_til_ready blocking: "
|
||||
"ttyC%d, count = %d\n",
|
||||
info->line, info->port.count);
|
||||
#endif
|
||||
schedule();
|
||||
}
|
||||
} else {
|
||||
struct FIRM_ID __iomem *firm_id;
|
||||
struct ZFW_CTRL __iomem *zfw_ctrl;
|
||||
struct BOARD_CTRL __iomem *board_ctrl;
|
||||
struct CH_CTRL __iomem *ch_ctrl;
|
||||
|
||||
base_addr = cinfo->base_addr;
|
||||
firm_id = base_addr + ID_ADDRESS;
|
||||
if (!cyz_is_loaded(cinfo)) {
|
||||
__set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&info->port.open_wait, &wait);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
|
||||
& 0xfffff);
|
||||
board_ctrl = &zfw_ctrl->board_ctrl;
|
||||
ch_ctrl = zfw_ctrl->ch_ctrl;
|
||||
|
||||
while (1) {
|
||||
if ((tty->termios->c_cflag & CBAUD)) {
|
||||
cy_writel(&ch_ctrl[channel].rs_control,
|
||||
readl(&ch_ctrl[channel].rs_control) |
|
||||
C_RS_RTS | C_RS_DTR);
|
||||
retval = cyz_issue_cmd(cinfo,
|
||||
channel, C_CM_IOCTLM, 0L);
|
||||
if (retval != 0) {
|
||||
printk(KERN_ERR "cyc:block_til_ready "
|
||||
"retval on ttyC%d was %x\n",
|
||||
info->line, retval);
|
||||
}
|
||||
#ifdef CY_DEBUG_DTR
|
||||
printk(KERN_DEBUG "cyc:block_til_ready raising "
|
||||
"Z DTR\n");
|
||||
#endif
|
||||
}
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
if (tty_hung_up_p(filp) ||
|
||||
!(info->port.flags & ASYNC_INITIALIZED)) {
|
||||
retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
|
||||
-EAGAIN : -ERESTARTSYS);
|
||||
break;
|
||||
}
|
||||
if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
|
||||
(readl(&ch_ctrl[channel].rs_status) &
|
||||
C_RS_DCD))) {
|
||||
break;
|
||||
}
|
||||
if (signal_pending(current)) {
|
||||
retval = -ERESTARTSYS;
|
||||
break;
|
||||
}
|
||||
#ifdef CY_DEBUG_OPEN
|
||||
printk(KERN_DEBUG "cyc block_til_ready blocking: "
|
||||
"ttyC%d, count = %d\n",
|
||||
info->line, info->port.count);
|
||||
#endif
|
||||
schedule();
|
||||
}
|
||||
}
|
||||
__set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&info->port.open_wait, &wait);
|
||||
if (!tty_hung_up_p(filp)) {
|
||||
info->port.count++;
|
||||
#ifdef CY_DEBUG_COUNT
|
||||
printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
|
||||
"count to %d\n", current->pid, info->port.count);
|
||||
#endif
|
||||
}
|
||||
info->port.blocked_open--;
|
||||
#ifdef CY_DEBUG_OPEN
|
||||
printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
|
||||
"count = %d\n", info->line, info->port.count);
|
||||
#endif
|
||||
if (retval)
|
||||
return retval;
|
||||
info->port.flags |= ASYNC_NORMAL_ACTIVE;
|
||||
return 0;
|
||||
} /* block_til_ready */
|
||||
|
||||
/*
|
||||
* This routine is called whenever a serial port is opened. It
|
||||
* performs the serial-specific initialization for the tty structure.
|
||||
|
|
@ -2472,7 +2279,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp)
|
|||
if (retval)
|
||||
return retval;
|
||||
|
||||
retval = block_til_ready(tty, filp, info);
|
||||
retval = tty_port_block_til_ready(&info->port, tty, filp);
|
||||
if (retval) {
|
||||
#ifdef CY_DEBUG_OPEN
|
||||
printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
|
||||
|
|
@ -4312,6 +4119,111 @@ static void cy_hangup(struct tty_struct *tty)
|
|||
wake_up_interruptible(&info->port.open_wait);
|
||||
} /* cy_hangup */
|
||||
|
||||
static int cyy_carrier_raised(struct tty_port *port)
|
||||
{
|
||||
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
||||
port);
|
||||
struct cyclades_card *cinfo = info->card;
|
||||
void __iomem *base = cinfo->base_addr;
|
||||
unsigned long flags;
|
||||
int channel = info->line - cinfo->first_line;
|
||||
int chip = channel >> 2, index = cinfo->bus_index;
|
||||
u32 cd;
|
||||
|
||||
channel &= 0x03;
|
||||
base += cy_chip_offset[chip] << index;
|
||||
|
||||
spin_lock_irqsave(&cinfo->card_lock, flags);
|
||||
cy_writeb(base + (CyCAR << index), (u8)channel);
|
||||
cd = readb(base + (CyMSVR1 << index)) & CyDCD;
|
||||
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
||||
|
||||
return cd;
|
||||
}
|
||||
|
||||
static void cyy_dtr_rts(struct tty_port *port, int raise)
|
||||
{
|
||||
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
||||
port);
|
||||
struct cyclades_card *cinfo = info->card;
|
||||
void __iomem *base = cinfo->base_addr;
|
||||
unsigned long flags;
|
||||
int channel = info->line - cinfo->first_line;
|
||||
int chip = channel >> 2, index = cinfo->bus_index;
|
||||
|
||||
channel &= 0x03;
|
||||
base += cy_chip_offset[chip] << index;
|
||||
|
||||
spin_lock_irqsave(&cinfo->card_lock, flags);
|
||||
cy_writeb(base + (CyCAR << index), (u8)channel);
|
||||
cy_writeb(base + (CyMSVR1 << index), raise ? CyRTS : ~CyRTS);
|
||||
cy_writeb(base + (CyMSVR2 << index), raise ? CyDTR : ~CyDTR);
|
||||
#ifdef CY_DEBUG_DTR
|
||||
printk(KERN_DEBUG "%s: raising DTR\n", __func__);
|
||||
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
||||
readb(base + (CyMSVR1 << index)),
|
||||
readb(base + (CyMSVR2 << index)));
|
||||
#endif
|
||||
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
||||
}
|
||||
|
||||
static int cyz_carrier_raised(struct tty_port *port)
|
||||
{
|
||||
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
||||
port);
|
||||
struct cyclades_card *cinfo = info->card;
|
||||
void __iomem *base = cinfo->base_addr;
|
||||
struct FIRM_ID __iomem *firm_id = base + ID_ADDRESS;
|
||||
struct ZFW_CTRL __iomem *zfw_ctrl;
|
||||
struct CH_CTRL __iomem *ch_ctrl;
|
||||
int channel = info->line - cinfo->first_line;
|
||||
|
||||
zfw_ctrl = base + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
||||
ch_ctrl = zfw_ctrl->ch_ctrl;
|
||||
|
||||
return readl(&ch_ctrl[channel].rs_status) & C_RS_DCD;
|
||||
}
|
||||
|
||||
static void cyz_dtr_rts(struct tty_port *port, int raise)
|
||||
{
|
||||
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
||||
port);
|
||||
struct cyclades_card *cinfo = info->card;
|
||||
void __iomem *base = cinfo->base_addr;
|
||||
struct FIRM_ID __iomem *firm_id = base + ID_ADDRESS;
|
||||
struct ZFW_CTRL __iomem *zfw_ctrl;
|
||||
struct CH_CTRL __iomem *ch_ctrl;
|
||||
int ret, channel = info->line - cinfo->first_line;
|
||||
u32 rs;
|
||||
|
||||
zfw_ctrl = base + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
||||
ch_ctrl = zfw_ctrl->ch_ctrl;
|
||||
|
||||
rs = readl(&ch_ctrl[channel].rs_control);
|
||||
if (raise)
|
||||
rs |= C_RS_RTS | C_RS_DTR;
|
||||
else
|
||||
rs &= ~(C_RS_RTS | C_RS_DTR);
|
||||
cy_writel(&ch_ctrl[channel].rs_control, rs);
|
||||
ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
|
||||
if (ret != 0)
|
||||
printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
|
||||
__func__, info->line, ret);
|
||||
#ifdef CY_DEBUG_DTR
|
||||
printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
|
||||
#endif
|
||||
}
|
||||
|
||||
static const struct tty_port_operations cyy_port_ops = {
|
||||
.carrier_raised = cyy_carrier_raised,
|
||||
.dtr_rts = cyy_dtr_rts,
|
||||
};
|
||||
|
||||
static const struct tty_port_operations cyz_port_ops = {
|
||||
.carrier_raised = cyz_carrier_raised,
|
||||
.dtr_rts = cyz_dtr_rts,
|
||||
};
|
||||
|
||||
/*
|
||||
* ---------------------------------------------------------------------
|
||||
* cy_init() and friends
|
||||
|
|
@ -4351,6 +4263,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo)
|
|||
init_waitqueue_head(&info->delta_msr_wait);
|
||||
|
||||
if (cy_is_Z(cinfo)) {
|
||||
info->port.ops = &cyz_port_ops;
|
||||
info->type = PORT_STARTECH;
|
||||
if (cinfo->hw_ver == ZO_V1)
|
||||
info->xmit_fifo_size = CYZ_FIFO_SIZE;
|
||||
|
|
@ -4362,6 +4275,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo)
|
|||
#endif
|
||||
} else {
|
||||
int index = cinfo->bus_index;
|
||||
info->port.ops = &cyy_port_ops;
|
||||
info->type = PORT_CIRRUS;
|
||||
info->xmit_fifo_size = CyMAX_CHAR_FIFO;
|
||||
info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue