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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>
hifive-unleashed-5.1
Jiri Slaby 2009-09-19 13:13:12 -07:00 committed by Live-CD User
parent d13549f804
commit f073757942
1 changed files with 108 additions and 194 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

302
drivers/char/cyclades.c
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@ -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;