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clean up ssc driver

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SVN-Revision: 9848
This commit is contained in:
John Crispin 2007-12-22 21:21:38 +00:00
parent ef4f5a06d1
commit ccbf0d3996
1 changed files with 44 additions and 67 deletions
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111
target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c
View file

@ -58,16 +58,6 @@
#include <asm/ifxmips/ifx_ssc_defines.h>
#include <asm/ifxmips/ifx_ssc.h>
#ifdef SSC_FRAME_INT_ENABLE
#undef SSC_FRAME_INT_ENABLE
#endif
#define not_yet
#define SPI_VINETIC
/* allow the user to set the major device number */
static int maj = 0;
@ -78,15 +68,6 @@ static int maj = 0;
*/
static struct ifx_ssc_port *isp;
/* prototypes for fops */
static ssize_t ifx_ssc_read (struct file *, char *, size_t, loff_t *);
static ssize_t ifx_ssc_write (struct file *, const char *, size_t, loff_t *);
//static unsigned int ifx_ssc_poll(struct file *, struct poll_table_struct *);
int ifx_ssc_ioctl (struct inode *, struct file *, unsigned int,
unsigned long);
int ifx_ssc_open (struct inode *, struct file *);
int ifx_ssc_close (struct inode *, struct file *);
/* other forward declarations */
static unsigned int ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info);
static void tx_int (struct ifx_ssc_port *);
@ -94,15 +75,6 @@ static void tx_int (struct ifx_ssc_port *);
extern unsigned int ifxmips_get_fpi_hz (void);
extern void mask_and_ack_ifxmips_irq (unsigned int irq_nr);
static struct file_operations ifx_ssc_fops = {
.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
ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info)
{
@ -203,7 +175,7 @@ rx_int (struct ifx_ssc_port *info)
// check if transfer is complete
if (info->rxbuf_ptr >= info->rxbuf_end)
{
disable_irq(info->rxirq);
disable_irq(IFXMIPS_SSC_RIR);
wake_up_interruptible (&info->rwait);
} else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) && (readl(IFXMIPS_SSC_RXCNT) == 0))
{
@ -261,7 +233,7 @@ tx_int (struct ifx_ssc_port *info)
// check if transmission complete
if (info->txbuf_ptr >= info->txbuf_end)
{
disable_irq(info->txirq);
disable_irq(IFXMIPS_SSC_TIR);
kfree (info->txbuf);
info->txbuf = NULL;
}
@ -338,9 +310,9 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
local_irq_save (flags);
disable_irq(info->rxirq);
disable_irq(info->txirq);
disable_irq(info->errirq);
disable_irq(IFXMIPS_SSC_RIR);
disable_irq(IFXMIPS_SSC_TIR);
disable_irq(IFXMIPS_SSC_EIR);
local_irq_restore (flags);
@ -368,9 +340,9 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
wake_up_interruptible (&info->rwait);
// clear pending int's
mask_and_ack_ifxmips_irq(info->rxirq);
mask_and_ack_ifxmips_irq(info->txirq);
mask_and_ack_ifxmips_irq(info->errirq);
mask_and_ack_ifxmips_irq(IFXMIPS_SSC_RIR);
mask_and_ack_ifxmips_irq(IFXMIPS_SSC_TIR);
mask_and_ack_ifxmips_irq(IFXMIPS_SSC_EIR);
// clear error flags
writel(IFX_SSC_WHBSTATE_CLR_ALL_ERROR, IFXMIPS_SSC_WHBSTATE);
@ -396,7 +368,6 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
line = (int) inode;
} else {
line = MINOR (filp->f_dentry->d_inode->i_rdev);
filp->f_op = &ifx_ssc_fops;
}
/* don't open more minor devices than we can support */
@ -410,9 +381,9 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
return -EBUSY;
info->port_is_open++;
disable_irq(info->rxirq);
disable_irq(info->txirq);
disable_irq(info->errirq);
disable_irq(IFXMIPS_SSC_RIR);
disable_irq(IFXMIPS_SSC_TIR);
disable_irq(IFXMIPS_SSC_EIR);
/* Flush and enable TX/RX FIFO */
writel((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_TXFCON);
@ -426,9 +397,9 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
writel(IFX_SSC_WHBSTATE_CLR_ALL_ERROR, IFXMIPS_SSC_WHBSTATE);
// clear pending interrupts
mask_and_ack_ifxmips_irq(info->rxirq);
mask_and_ack_ifxmips_irq(info->txirq);
mask_and_ack_ifxmips_irq(info->errirq);
mask_and_ack_ifxmips_irq(IFXMIPS_SSC_RIR);
mask_and_ack_ifxmips_irq(IFXMIPS_SSC_TIR);
mask_and_ack_ifxmips_irq(IFXMIPS_SSC_EIR);
writel(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE);
@ -518,14 +489,14 @@ ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len, int from_
tx_int (info);
if (info->txbuf_ptr < info->txbuf_end)
enable_irq(info->txirq);
enable_irq(IFXMIPS_SSC_TIR);
enable_irq(info->rxirq);
enable_irq(IFXMIPS_SSC_RIR);
} else {
local_irq_restore(flags);
if (readl(IFXMIPS_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK)
return -EBUSY;
enable_irq(info->rxirq);
enable_irq(IFXMIPS_SSC_RIR);
if (len < IFX_SSC_RXREQ_BLOCK_SIZE)
writel(len << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ);
else
@ -574,7 +545,7 @@ ifx_ssc_write_helper (struct ifx_ssc_port *info, const char *buf,
tx_int (info);
if (info->txbuf_ptr < info->txbuf_end)
{
enable_irq(info->txirq);
enable_irq(IFXMIPS_SSC_TIR);
}
}
@ -611,7 +582,7 @@ ifx_ssc_kread (int port, char *kbuf, size_t len)
ret_val = ifx_ssc_read_helper_poll (info, kbuf, len, 1);
info->rxbuf = NULL;
disable_irq(info->rxirq);
disable_irq(IFXMIPS_SSC_RIR);
return ret_val;
}
@ -667,7 +638,7 @@ 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;
disable_irq(info->rxirq);
disable_irq(IFXMIPS_SSC_RIR);
kfree (info->rxbuf);
info->rxbuf = NULL;
@ -1161,6 +1132,15 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigne
}
EXPORT_SYMBOL(ifx_ssc_ioctl);
static struct file_operations ifx_ssc_fops = {
.owner = THIS_MODULE,
.read = ifx_ssc_read,
.write = ifx_ssc_write,
.ioctl = ifx_ssc_ioctl,
.open = ifx_ssc_open,
.release = ifx_ssc_close,
};
int __init
ifx_ssc_init (void)
{
@ -1227,9 +1207,6 @@ ifx_ssc_init (void)
/* values specific to SSC1 */
if (i == 0) {
info->mapbase = IFXMIPS_SSC_BASE_ADDR;
info->txirq = IFXMIPS_SSC_TIR;
info->rxirq = IFXMIPS_SSC_RIR;
info->errirq = IFXMIPS_SSC_EIR;
}
writel(IFX_SSC_DEF_RMC << IFX_CLC_RUN_DIVIDER_OFFSET, IFXMIPS_SSC_CLC);
@ -1241,34 +1218,34 @@ ifx_ssc_init (void)
// init serial framing register
writel(IFX_SSC_DEF_SFCON, IFXMIPS_SSC_SFCON);
ret_val = request_irq(info->txirq, ifx_ssc_tx_int, SA_INTERRUPT, "ifx_ssc_tx", info);
ret_val = request_irq(IFXMIPS_SSC_TIR, ifx_ssc_tx_int, IRQF_DISABLED, "ifx_ssc_tx", info);
if (ret_val)
{
printk("%s: unable to get irq %d\n", __func__, info->txirq);
printk("%s: unable to get irq %d\n", __func__, IFXMIPS_SSC_TIR);
local_irq_restore(flags);
goto errout;
}
ret_val = request_irq(info->rxirq, ifx_ssc_rx_int, SA_INTERRUPT, "ifx_ssc_rx", info);
ret_val = request_irq(IFXMIPS_SSC_RIR, ifx_ssc_rx_int, IRQF_DISABLED, "ifx_ssc_rx", info);
if (ret_val)
{
printk ("%s: unable to get irq %d\n", __func__, info->rxirq);
printk ("%s: unable to get irq %d\n", __func__, IFXMIPS_SSC_RIR);
local_irq_restore (flags);
goto irqerr;
}
ret_val = request_irq(info->errirq, ifx_ssc_err_int, SA_INTERRUPT,"ifx_ssc_err", info);
ret_val = request_irq(IFXMIPS_SSC_EIR, ifx_ssc_err_int, IRQF_DISABLED, "ifx_ssc_err", info);
if (ret_val)
{
printk ("%s: unable to get irq %d\n", __func__, info->errirq);
printk ("%s: unable to get irq %d\n", __func__, IFXMIPS_SSC_EIR);
local_irq_restore (flags);
goto irqerr;
}
writel(IFX_SSC_DEF_IRNEN, IFXMIPS_SSC_IRN);
enable_irq(info->txirq);
enable_irq(info->rxirq);
enable_irq(info->errirq);
//enable_irq(IFXMIPS_SSC_TIR);
//enable_irq(IFXMIPS_SSC_RIR);
//enable_irq(IFXMIPS_SSC_EIR);
local_irq_restore (flags);
}
@ -1286,9 +1263,9 @@ ifx_ssc_init (void)
return 0;
irqerr:
free_irq(isp[0].txirq, &isp[0]);
free_irq(isp[0].rxirq, &isp[0]);
free_irq(isp[0].errirq, &isp[0]);
free_irq(IFXMIPS_SSC_TIR, &isp[0]);
free_irq(IFXMIPS_SSC_RIR, &isp[0]);
free_irq(IFXMIPS_SSC_EIR, &isp[0]);
errout:
kfree (isp);
return (ret_val);
@ -1301,9 +1278,9 @@ ifx_ssc_cleanup_module (void)
for (i = 0; i < PORT_CNT; i++) {
writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE);
free_irq(isp[i].txirq, &isp[i]);
free_irq(isp[i].rxirq, &isp[i]);
free_irq(isp[i].errirq, &isp[i]);
free_irq(IFXMIPS_SSC_TIR, &isp[i]);
free_irq(IFXMIPS_SSC_RIR, &isp[i]);
free_irq(IFXMIPS_SSC_EIR, &isp[i]);
}
kfree (isp);
}