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Code

danube ssc cleanup

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9765 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
blogic 2007-12-15 15:53:56 +00:00
parent 04ea1c319a
commit 9933173a76
1 changed files with 66 additions and 324 deletions
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390
target/linux/danube/files/drivers/char/danube_ssc.c
View File

@ -90,49 +90,20 @@ int ifx_ssc_close (struct inode *, struct file *);
/* other forward declarations */
static unsigned int ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info);
#ifdef SSC_FRAME_INT_ENABLE
static void ifx_ssc_frm_int (int, void *, struct pt_regs *);
#endif
static void tx_int (struct ifx_ssc_port *);
static int ifx_ssc1_read_proc (char *, char **, off_t, int, int *, void *);
static void ifx_gpio_init (void);
/************************************************************************
* Function declaration
************************************************************************/
//interrupt.c
extern unsigned int danube_get_fpi_hz (void);
extern void disable_danube_irq (unsigned int irq_nr);
extern void enable_danube_irq (unsigned int irq_nr);
extern void mask_and_ack_danube_irq (unsigned int irq_nr);
/*****************************************************************/
typedef struct {
int (*request) (unsigned int, irq_handler_t handler,
unsigned long, const char *, void *);
void (*free) (unsigned int irq, void *dev_id);
void (*enable) (unsigned int irq);
void (*disable) (unsigned int irq);
void (*clear) (unsigned int irq);
} ifx_int_wrapper_t;
static ifx_int_wrapper_t ifx_int_wrapper = {
request:request_irq, // IM action: enable int
free:free_irq, // IM action: disable int
enable:enable_danube_irq,
disable:disable_danube_irq,
clear:mask_and_ack_danube_irq,
//end:
};
/* Fops-struct */
static struct file_operations ifx_ssc_fops = {
owner:THIS_MODULE,
read:ifx_ssc_read, /* read */
write:ifx_ssc_write, /* write */
// poll: ifx_ssc_poll, /* poll */
ioctl:ifx_ssc_ioctl, /* ioctl */
open:ifx_ssc_open, /* open */
release:ifx_ssc_close, /* release */
.owner = THIS_MODULE,
.read = ifx_ssc_read,
.write = ifx_ssc_write,
.ioctl = ifx_ssc_ioctl,
.open = ifx_ssc_open,
.release = ifx_ssc_close,
};
static inline unsigned int
@ -164,35 +135,7 @@ ifx_ssc_sched_event (struct ifx_ssc_port *info, int event)
info->event |= 1 << event; /* remember what kind of event and who */
queue_task (&info->tqueue, &tq_cyclades); /* it belongs to */
mark_bh (CYCLADES_BH); /* then trigger event */
} /* ifx_ssc_sched_event */
/*
* This routine is used to handle the "bottom half" processing for the
* serial driver, known also the "software interrupt" processing.
* This processing is done at the kernel interrupt level, after the
* cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
* is where time-consuming activities which can not be done in the
* interrupt driver proper are done; the interrupt driver schedules
* them using ifx_ssc_sched_event(), and they get done here.
*
* This is done through one level of indirection--the task queue.
* When a hardware interrupt service routine wants service by the
* driver's bottom half, it enqueues the appropriate tq_struct (one
* per port) to the tq_cyclades work queue and sets a request flag
* via mark_bh for processing that queue. When the time is right,
* do_ifx_ssc_bh is called (because of the mark_bh) and it requests
* that the work queue be processed.
*
* Although this may seem unwieldy, it gives the system a way to
* pass an argument (in this case the pointer to the ifx_ssc_port
* structure) to the bottom half of the driver. Previous kernels
* had to poll every port to see if that port needed servicing.
*/
static void
do_ifx_ssc_bh (void)
{
run_task_queue (&tq_cyclades);
} /* do_ifx_ssc_bh */
}
static void
do_softint (void *private_)
@ -290,7 +233,7 @@ rx_int (struct ifx_ssc_port *info)
// check if transfer is complete
if (info->rxbuf_ptr >= info->rxbuf_end) {
ifx_int_wrapper.disable (info->rxirq);
disable_irq(info->rxirq);
/* wakeup any processes waiting in read() */
wake_up_interruptible (&info->rwait);
/* and in poll() */
@ -317,7 +260,7 @@ rx_int (struct ifx_ssc_port *info)
info->mapbase +
IFX_SSC_RXREQ);
}
} // rx_int
}
inline static void
tx_int (struct ifx_ssc_port *info)
@ -372,14 +315,14 @@ tx_int (struct ifx_ssc_port *info)
// check if transmission complete
if (info->txbuf_ptr >= info->txbuf_end) {
ifx_int_wrapper.disable (info->txirq);
disable_irq(info->txirq);
kfree (info->txbuf);
info->txbuf = NULL;
/* wake up any process waiting in poll() */
//wake_up_interruptible(&info->pwait);
}
} // tx_int
}
irqreturn_t
ifx_ssc_rx_int (int irq, void *dev_id)
@ -444,14 +387,6 @@ ifx_ssc_err_int (int irq, void *dev_id)
return IRQ_HANDLED;
}
#ifdef SSC_FRAME_INT_ENABLE
static void
ifx_ssc_frm_int (int irq, void *dev_id, struct pt_regs *regs)
{
// ### TO DO: wake up framing wait-queue in conjunction with batch execution
}
#endif
static void
ifx_ssc_abort (struct ifx_ssc_port *info)
{
@ -460,13 +395,10 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
local_irq_save (flags);
// disable all int's
ifx_int_wrapper.disable (info->rxirq);
ifx_int_wrapper.disable (info->txirq);
ifx_int_wrapper.disable (info->errirq);
/*
ifx_int_wrapper.disable(info->frmirq);
*/
disable_irq(info->rxirq);
disable_irq(info->txirq);
disable_irq(info->errirq);
local_irq_restore (flags);
// disable SSC (also aborts a receive request!)
@ -496,24 +428,19 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
wake_up_interruptible (&info->rwait);
// clear pending int's
ifx_int_wrapper.clear (info->rxirq);
ifx_int_wrapper.clear (info->txirq);
ifx_int_wrapper.clear (info->errirq);
/*
ifx_int_wrapper.clear(info->frmirq);
*/
mask_and_ack_danube_irq(info->rxirq);
mask_and_ack_danube_irq(info->txirq);
mask_and_ack_danube_irq(info->errirq);
// clear error flags
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR,
info->mapbase + IFX_SSC_WHBSTATE);
//printk("IFX SSC%d: Transmission aborted\n", info->port_nr);
// enable SSC
if (enabled)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE,
info->mapbase + IFX_SSC_WHBSTATE);
} // ifx_ssc_abort
}
/*
* This routine is called whenever a port is opened. It enforces
@ -546,12 +473,9 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
return -EBUSY;
info->port_is_open++;
ifx_int_wrapper.disable (info->rxirq);
ifx_int_wrapper.disable (info->txirq);
ifx_int_wrapper.disable (info->errirq);
/*
ifx_int_wrapper.disable(info->frmirq);
*/
disable_irq(info->rxirq);
disable_irq(info->txirq);
disable_irq(info->errirq);
/* Flush and enable TX/RX FIFO */
WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_TXFIFO_FL <<
@ -574,20 +498,15 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
info->mapbase + IFX_SSC_WHBSTATE);
// clear pending interrupts
ifx_int_wrapper.clear (info->rxirq);
ifx_int_wrapper.clear (info->txirq);
ifx_int_wrapper.clear (info->errirq);
/*
ifx_int_wrapper.clear(info->frmirq);
*/
mask_and_ack_danube_irq(info->rxirq);
mask_and_ack_danube_irq(info->txirq);
mask_and_ack_danube_irq(info->errirq);
// enable SSC
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE,
info->mapbase + IFX_SSC_WHBSTATE);
return 0;
} /* ifx_ssc_open */
}
EXPORT_SYMBOL (ifx_ssc_open);
/*
@ -621,8 +540,7 @@ ifx_ssc_close (struct inode *inode, struct file *filp)
info->port_is_open--;
return 0;
} /* ifx_ssc_close */
}
EXPORT_SYMBOL (ifx_ssc_close);
/* added by bingtao */
@ -659,7 +577,7 @@ ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len,
ret_val = info->rxbuf_ptr - info->rxbuf;
return (ret_val);
} // ifx_ssc_read_helper_poll
}
/* helper routine to handle reads from the kernel or user-space */
/* info->rx_buf : never kfree and contains valid data */
@ -688,18 +606,17 @@ ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len,
local_irq_restore (flags);
/* should enable tx, right? */
tx_int (info);
if (info->txbuf_ptr < info->txbuf_end) {
ifx_int_wrapper.enable (info->txirq);
}
if (info->txbuf_ptr < info->txbuf_end)
enable_irq(info->txirq);
ifx_int_wrapper.enable (info->rxirq);
enable_irq(info->rxirq);
}
else { // rx mode
local_irq_restore (flags);
if (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) &
IFX_SSC_RXCNT_TODO_MASK)
return -EBUSY;
ifx_int_wrapper.enable (info->rxirq);
enable_irq(info->rxirq);
// rx request limited to ' bytes
/*
if (len < 65536)
@ -726,11 +643,6 @@ ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len,
break;
local_irq_restore (flags);
// if (filp->f_flags & O_NONBLOCK)
// {
// N = -EAGAIN;
// goto out;
// }
if (signal_pending (current)) {
ret_val = -ERESTARTSYS;
goto out;
@ -738,14 +650,14 @@ ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len,
schedule ();
} while (1);
ret_val = info->rxbuf_ptr - info->rxbuf; // should be equal to len
ret_val = info->rxbuf_ptr - info->rxbuf;
local_irq_restore (flags);
out:
current->state = TASK_RUNNING;
__remove_wait_queue (&info->rwait, &wait);
return (ret_val);
} // ifx_ssc_read_helper
}
/* helper routine to handle writes to the kernel or user-space */
@ -767,7 +679,7 @@ ifx_ssc_write_helper (struct ifx_ssc_port *info, const char *buf,
if (info->opts.modeRxTx == IFX_SSC_MODE_TX) {
tx_int (info);
if (info->txbuf_ptr < info->txbuf_end) {
ifx_int_wrapper.enable (info->txirq);
enable_irq(info->txirq);
}
}
//local_irq_restore(flags);
@ -816,7 +728,7 @@ ifx_ssc_kread (int port, char *kbuf, size_t len)
info->rxbuf = NULL;
// ### TO DO: perhaps warn if ret_val != len
ifx_int_wrapper.disable (info->rxirq);
disable_irq(info->rxirq);
return (ret_val);
} // ifx_ssc_kread
@ -881,12 +793,12 @@ ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
if (copy_to_user ((void *) ubuf, info->rxbuf, ret_val) != 0)
ret_val = -EFAULT;
ifx_int_wrapper.disable (info->rxirq);
disable_irq(info->rxirq);
kfree (info->rxbuf);
info->rxbuf = NULL;
return (ret_val);
} // ifx_ssc_read
}
/*
* As many bytes as we have free space for are copied from the user
@ -924,28 +836,8 @@ ifx_ssc_write (struct file *filp, const char *ubuf, size_t len, loff_t * off)
info->txbuf = NULL;
}
return (ret_val);
} /* ifx_ssc_write */
}
/*
* ------------------------------------------------------------
* ifx_ssc_ioctl() and friends
* ------------------------------------------------------------
*/
/*-----------------------------------------------------------------------------
FUNC-NAME : ifx_ssc_frm_status_get
LONG-NAME : framing status get
PURPOSE : Get the actual status of the framing.
PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
RESULT : pointer to a structure ifx_ssc_frm_status which holds busy and
count values.
REMARKS : Returns a register value independent of framing is enabled or
not! Changes structure inside of info, so the return value isn't
needed at all, but could be used for simple access.
-----------------------------------------------------------------------------*/
static struct ifx_ssc_frm_status *
ifx_ssc_frm_status_get (struct ifx_ssc_port *info)
{
@ -964,21 +856,9 @@ ifx_ssc_frm_status_get (struct ifx_ssc_port *info)
info->frm_status.EnIntAfterPause =
(tmp & IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE) > 0;
return (&info->frm_status);
} // ifx_ssc_frm_status_get
}
/*-----------------------------------------------------------------------------
FUNC-NAME : ifx_ssc_frm_control_get
LONG-NAME : framing control get
PURPOSE : Get the actual control values of the framing.
PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
RESULT : pointer to a structure ifx_ssc_frm_opts which holds control bits
and count reload values.
REMARKS : Changes structure inside of info, so the return value isn't
needed at all, but could be used for simple access.
-----------------------------------------------------------------------------*/
static struct ifx_ssc_frm_opts *
ifx_ssc_frm_control_get (struct ifx_ssc_port *info)
{
@ -997,20 +877,8 @@ ifx_ssc_frm_control_get (struct ifx_ssc_port *info)
info->frm_opts.StopAfterPause =
(tmp & IFX_SSC_SFCON_STOP_AFTER_PAUSE) > 0;
return (&info->frm_opts);
} // ifx_ssc_frm_control_get
}
/*-----------------------------------------------------------------------------
FUNC-NAME : ifx_ssc_frm_control_set
LONG-NAME : framing control set
PURPOSE : Set the actual control values of the framing.
PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
RESULT : pointer to a structure ifx_ssc_frm_opts which holds control bits
and count reload values.
REMARKS :
-----------------------------------------------------------------------------*/
static int
ifx_ssc_frm_control_set (struct ifx_ssc_port *info)
{
@ -1049,20 +917,8 @@ ifx_ssc_frm_control_set (struct ifx_ssc_port *info)
WRITE_PERIPHERAL_REGISTER (tmp, info->mapbase + IFX_SSC_SFCON);
return 0;
} // ifx_ssc_frm_control_set
}
/*-----------------------------------------------------------------------------
FUNC-NAME : ifx_ssc_rxtx_mode_set
LONG-NAME : rxtx mode set
PURPOSE : Set the transmission mode.
PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
RESULT : Returns error code
REMARKS : Assumes that SSC not used (SSC disabled, device not opened yet
or just closed)
-----------------------------------------------------------------------------*/
static int
ifx_ssc_rxtx_mode_set (struct ifx_ssc_port *info, unsigned int val)
{
@ -1083,14 +939,8 @@ ifx_ssc_rxtx_mode_set (struct ifx_ssc_port *info, unsigned int val)
~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF)) | (val);
WRITE_PERIPHERAL_REGISTER (tmp, info->mapbase + IFX_SSC_CON);
info->opts.modeRxTx = val;
/*
printk(KERN_DEBUG "IFX SSC%d: Setting mode to %s%s\n",
info->port_nr,
((val & IFX_SSC_CON_RX_OFF) == 0) ? "rx ":"",
((val & IFX_SSC_CON_TX_OFF) == 0) ? "tx":"");
*/
return 0;
} // ifx_ssc_rxtx_mode_set
}
void
ifx_gpio_init (void)
@ -1117,12 +967,6 @@ ifx_gpio_init (void)
}
/*
* This routine intializes the SSC appropriately depending
* on slave/master and full-/half-duplex mode.
* It assumes that the SSC is disabled and the fifo's and buffers
* are flushes later on.
*/
static int
ifx_ssc_sethwopts (struct ifx_ssc_port *info)
{
@ -1194,7 +1038,7 @@ ifx_ssc_sethwopts (struct ifx_ssc_port *info)
local_irq_restore (flags);
return 0;
} // ifx_ssc_sethwopts
}
static int
ifx_ssc_set_baud (struct ifx_ssc_port *info, unsigned int baud)
@ -1216,7 +1060,7 @@ ifx_ssc_set_baud (struct ifx_ssc_port *info, unsigned int baud)
// compute divider
br = (((ifx_ssc_clock >> 1) + baud / 2) / baud) - 1;
asm ("SYNC");
wmb();
if (br > 0xffff ||
((br == 0) &&
((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) &
@ -1232,7 +1076,7 @@ ifx_ssc_set_baud (struct ifx_ssc_port *info, unsigned int baud)
local_irq_restore (flags);
return 0;
} // ifx_ssc_set_baud
}
static int
ifx_ssc_hwinit (struct ifx_ssc_port *info)
@ -1272,36 +1116,8 @@ ifx_ssc_hwinit (struct ifx_ssc_port *info)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE,
info->mapbase + IFX_SSC_WHBSTATE);
return 0;
} // ifx_ssc_hwinit
}
/*-----------------------------------------------------------------------------
FUNC-NAME : ifx_ssc_batch_exec
LONG-NAME :
PURPOSE :
PARAMETER : *info pointer to the port-specific structure ifx_ssc_port.
RESULT : Returns error code
REMARKS :
-----------------------------------------------------------------------------*/
static int
ifx_ssc_batch_exec (struct ifx_ssc_port *info,
struct ifx_ssc_batch_list *batch_anchor)
{
// ### TO DO: implement user space batch execution
// first, copy the whole linked list from user to kernel space
// save some hardware options
// execute list
// restore hardware options if selected
return -EFAULT;
} // ifx_ssc_batch_exec
/*
* This routine allows the driver to implement device-
* specific ioctl's. If the ioctl number passed in cmd is
* not recognized by the driver, it should return ENOIOCTLCMD.
*/
int
ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long data)
@ -1510,45 +1326,10 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd,
}
return ret_val;
} /* ifx_ssc_ioctl */
}
EXPORT_SYMBOL (ifx_ssc_ioctl);
///* the poll routine */
//static unsigned int
//ifx_ssc_poll(struct file *filp, struct poll_table_struct *pts)
//{
// int unit = MINOR(filp->f_dentry->d_inode->i_rdev);
// struct ifx_ssc_port *info;
// unsigned int mask = 0;
// int spc;
//
// info = &isp[unit];
//
// /* add event to the wait queues */
// /* DO NOT FORGET TO DO A WAKEUP ON THESE !!!! */
// poll_wait(filp, &info->pwait, pts);
//
// /* are there bytes in the RX SW-FIFO? */
// if (info->rxrp != info->rxwp)
// mask |= POLLIN | POLLRDNORM;
//
// /* free space in the TX SW-FIFO */
// spc = info->txrp - info->txwp - 1;
// if (spc < 0)
// spc += TX_BUFSIZE;
//#ifdef IFX_SSC_USEDMA
// /* writing always works, except in the DMA case when all descriptors */
// /* are used up */
// if (unit == 1 && info->dma_freecnt == 0)
// spc = 0;
//#endif
// if (spc > 0)
// mask |= POLLOUT | POLLWRNORM;
//
// return (mask);
//}
static int
ifx_ssc1_read_proc (char *page, char **start, off_t offset, int count,
int *eof, void *data)
@ -1577,22 +1358,11 @@ ifx_ssc1_read_proc (char *page, char **start, off_t offset, int count,
off += sprintf (page + off, "RX Bytes %d\n", isp[0].stats.rxBytes);
off += sprintf (page + off, "TX Bytes %d\n", isp[0].stats.txBytes);
local_irq_restore(flags); /* XXXXX */
local_irq_restore(flags);
*eof = 1;
return (off);
}
/*
* This routine prints out the appropriate serial driver version number
*/
static inline void
show_version (void)
{
#if 0
printk ("Infineon Technologies Synchronous Serial Controller (SSC) driver\n" " version %s - built %s %s\n", IFX_SSC_DRV_VERSION, __DATE__, __TIME__);
#endif
} /* show_version */
/*
* Due to the fact that a port can be dynamically switched between slave
* and master mode using an IOCTL the hardware is not initialized here,
@ -1617,8 +1387,6 @@ ifx_ssc_init (void)
}
memset (isp, 0, nbytes);
show_version ();
/* register the device */
ret_val = -ENXIO;
/*
@ -1701,7 +1469,7 @@ ifx_ssc_init (void)
/* try to get the interrupts */
// ### TO DO: interrupt handling with multiple instances
ret_val =
ifx_int_wrapper.request (info->txirq, ifx_ssc_tx_int, SA_INTERRUPT, "ifx_ssc_tx", info);
request_irq(info->txirq, ifx_ssc_tx_int, SA_INTERRUPT, "ifx_ssc_tx", info);
if (ret_val) {
printk ("%s: unable to get irq %d\n", __FUNCTION__,
info->txirq);
@ -1709,7 +1477,7 @@ ifx_ssc_init (void)
goto errout;
}
ret_val =
ifx_int_wrapper.request (info->rxirq, ifx_ssc_rx_int, SA_INTERRUPT, "ifx_ssc_rx", info);
request_irq(info->rxirq, ifx_ssc_rx_int, SA_INTERRUPT, "ifx_ssc_rx", info);
if (ret_val) {
printk ("%s: unable to get irq %d\n", __FUNCTION__,
info->rxirq);
@ -1717,32 +1485,21 @@ ifx_ssc_init (void)
goto irqerr;
}
ret_val =
ifx_int_wrapper.request (info->errirq, ifx_ssc_err_int, SA_INTERRUPT,"ifx_ssc_err", info);
request_irq(info->errirq, ifx_ssc_err_int, SA_INTERRUPT,"ifx_ssc_err", info);
if (ret_val) {
printk ("%s: unable to get irq %d\n", __FUNCTION__,
info->errirq);
local_irq_restore (flags);
goto irqerr;
}
/*
ret_val = ifx_int_wrapper.request(info->frmirq, ifx_ssc_frm_int,
0, "ifx_ssc_frm", info);
if (ret_val){
printk("%s: unable to get irq %d\n", __FUNCTION__,
info->frmirq);
local_irq_restore(flags);
goto irqerr;
}
*/
WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_IRNEN,
info->mapbase + IFX_SSC_IRN_EN);
ifx_int_wrapper.enable (info->txirq);
ifx_int_wrapper.enable (info->rxirq);
ifx_int_wrapper.enable (info->errirq);
enable_irq(info->txirq);
enable_irq(info->rxirq);
enable_irq(info->errirq);
local_irq_restore (flags);
} // for (i = 0; i < PORT_CNT; i++)
}
/* init the SSCs with default values */
for (i = 0; i < PORT_CNT; i++) {
@ -1761,15 +1518,12 @@ ifx_ssc_init (void)
NULL);
return 0;
irqerr:
irqerr:
// ### TO DO: multiple instances
ifx_int_wrapper.free (isp[0].txirq, &isp[0]);
ifx_int_wrapper.free (isp[0].rxirq, &isp[0]);
ifx_int_wrapper.free (isp[0].errirq, &isp[0]);
/*
ifx_int_wrapper.free(isp[0].frmirq, &isp[0]);
*/
errout:
free_irq(isp[0].txirq, &isp[0]);
free_irq(isp[0].rxirq, &isp[0]);
free_irq(isp[0].errirq, &isp[0]);
errout:
/* free up any allocated memory in the error case */
kfree (isp);
return (ret_val);
@ -1786,27 +1540,15 @@ ifx_ssc_cleanup_module (void)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE,
isp[i].mapbase + IFX_SSC_WHBSTATE);
/* free the interrupts */
ifx_int_wrapper.free (isp[i].txirq, &isp[i]);
ifx_int_wrapper.free (isp[i].rxirq, &isp[i]);
ifx_int_wrapper.free (isp[i].errirq, &isp[i]);
/*
ifx_int_wrapper.free(isp[i].frmirq, &isp[i]);
if (isp[i].rxbuf != NULL)
kfree(isp[i].rxbuf);
if (isp[i].txbuf != NULL)
kfree(isp[i].txbuf);
*/
free_irq(isp[i].txirq, &isp[i]);
free_irq(isp[i].rxirq, &isp[i]);
free_irq(isp[i].errirq, &isp[i]);
}
kfree (isp);
/* unregister the device */
// if (unregister_chrdev (maj, "ssc")) {
// printk ("Unable to unregister major %d for the SSC\n", maj);
// }
/* delete /proc read handler */
remove_proc_entry ("driver/ssc1", NULL);
remove_proc_entry ("driver/ssc2", NULL);
} /* ifx_ssc_cleanup_module */
}
module_exit (ifx_ssc_cleanup_module);