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danube ssc cleanup 

SVN-Revision: 9767
lede-17.01
John Crispin 2007-12-15 16:54:18 +00:00
parent bad4fdd1f5
commit b03f211098
1 changed files with 190 additions and 353 deletions
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541
target/linux/danube/files/drivers/char/danube_ssc.c
View File

@ -107,17 +107,16 @@ static struct file_operations ifx_ssc_fops = {
static inline unsigned int static inline unsigned int
ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info) ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info)
{ // ATTENTION: This function assumes that the CLC register is set with the {
// appropriate value for RMC.
unsigned int rmc; unsigned int rmc;
rmc = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CLC) & rmc = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CLC) & IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET;
IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET; if (rmc == 0)
if (rmc == 0) { {
printk ("ifx_ssc_get_kernel_clk rmc==0 \n"); printk ("ifx_ssc_get_kernel_clk rmc==0 \n");
return (0); return 0;
} }
return (danube_get_fpi_hz () / rmc); return danube_get_fpi_hz () / rmc;
} }
#ifndef not_yet #ifndef not_yet
@ -141,27 +140,27 @@ do_softint (void *private_)
{ {
struct ifx_ssc_port *info = (struct ifx_ssc_port *) private_; struct ifx_ssc_port *info = (struct ifx_ssc_port *) private_;
if (test_and_clear_bit (Cy_EVENT_HANGUP, &info->event)) { if (test_and_clear_bit (Cy_EVENT_HANGUP, &info->event))
{
wake_up_interruptible (&info->open_wait); wake_up_interruptible (&info->open_wait);
info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE); info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
} }
if (test_and_clear_bit (Cy_EVENT_OPEN_WAKEUP, &info->event)) {
if (test_and_clear_bit (Cy_EVENT_OPEN_WAKEUP, &info->event))
wake_up_interruptible (&info->open_wait); wake_up_interruptible (&info->open_wait);
}
if (test_and_clear_bit (Cy_EVENT_DELTA_WAKEUP, &info->event)) { if (test_and_clear_bit (Cy_EVENT_DELTA_WAKEUP, &info->event))
wake_up_interruptible (&info->delta_msr_wait); wake_up_interruptible (&info->delta_msr_wait);
}
if (test_and_clear_bit (Cy_EVENT_WRITE_WAKEUP, &info->event)) { if (test_and_clear_bit (Cy_EVENT_WRITE_WAKEUP, &info->event))
wake_up_interruptible (&tty->write_wait); wake_up_interruptible (&tty->write_wait);
}
#ifdef Z_WAKE #ifdef Z_WAKE
if (test_and_clear_bit (Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) { if (test_and_clear_bit (Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
wake_up_interruptible (&info->shutdown_wait); wake_up_interruptible (&info->shutdown_wait);
}
#endif #endif
} /* do_softint */ }
#endif /* IFX_SSC_INT_USE_BH */ #endif
#endif // not_yet #endif
inline static void inline static void
rx_int (struct ifx_ssc_port *info) rx_int (struct ifx_ssc_port *info)
@ -171,10 +170,7 @@ rx_int (struct ifx_ssc_port *info)
unsigned long *tmp_ptr; unsigned long *tmp_ptr;
unsigned int rx_valid_cnt; unsigned int rx_valid_cnt;
/* number of words waiting in the RX FIFO */ /* number of words waiting in the RX FIFO */
fifo_fill_lev = (READ_PERIPHERAL_REGISTER (info->mapbase + fifo_fill_lev = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_FSTAT) & IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >> IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET;
IFX_SSC_FSTAT) &
IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >>
IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET;
// Note: There are always 32 bits in a fifo-entry except for the last // Note: There are always 32 bits in a fifo-entry except for the last
// word of a contigous transfer block and except for not in rx-only // word of a contigous transfer block and except for not in rx-only
// mode and CON.ENBV set. But for this case it should be a convention // mode and CON.ENBV set. But for this case it should be a convention
@ -191,73 +187,44 @@ rx_int (struct ifx_ssc_port *info)
// transfer with 32 bits per entry // transfer with 32 bits per entry
while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0)) { while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0)) {
tmp_ptr = (unsigned long *) info->rxbuf_ptr; tmp_ptr = (unsigned long *) info->rxbuf_ptr;
*tmp_ptr = *tmp_ptr = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
info->rxbuf_ptr += 4; info->rxbuf_ptr += 4;
info->stats.rxBytes += 4; info->stats.rxBytes += 4;
fifo_fill_lev--; fifo_fill_lev--;
bytes_in_buf -= 4; bytes_in_buf -= 4;
} // while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0)) }
// now do the rest as mentioned in STATE.RXBV // now do the rest as mentioned in STATE.RXBV
while ((bytes_in_buf > 0) && (fifo_fill_lev > 0)) { while ((bytes_in_buf > 0) && (fifo_fill_lev > 0)) {
rx_valid_cnt = rx_valid_cnt = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_RX_BYTE_VALID_MASK) >> IFX_SSC_STATE_RX_BYTE_VALID_OFFSET;
(READ_PERIPHERAL_REGISTER
(info->mapbase +
IFX_SSC_STATE) & IFX_SSC_STATE_RX_BYTE_VALID_MASK)
>> IFX_SSC_STATE_RX_BYTE_VALID_OFFSET;
if (rx_valid_cnt == 0) if (rx_valid_cnt == 0)
break; break;
if (rx_valid_cnt > bytes_in_buf) {
// ### TO DO: warning message: not block aligned data, other data if (rx_valid_cnt > bytes_in_buf)
// in this entry will be lost
rx_valid_cnt = bytes_in_buf; rx_valid_cnt = bytes_in_buf;
}
tmp_val =
READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
for (i = 0; i < rx_valid_cnt; i++) { tmp_val = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
*info->rxbuf_ptr =
(tmp_val >> (8 * (rx_valid_cnt - i - 1))) & for (i = 0; i < rx_valid_cnt; i++)
0xff; {
/* *info->rxbuf_ptr = (tmp_val >> (8 * (rx_valid_cnt - i - 1))) & 0xff;
*info->rxbuf_ptr = tmp_val & 0xff;
tmp_val >>= 8;
*/
bytes_in_buf--; bytes_in_buf--;
info->rxbuf_ptr++; info->rxbuf_ptr++;
} }
info->stats.rxBytes += rx_valid_cnt; info->stats.rxBytes += rx_valid_cnt;
} // while ((bytes_in_buf > 0) && (fifo_fill_lev > 0)) }
// check if transfer is complete // check if transfer is complete
if (info->rxbuf_ptr >= info->rxbuf_end) { if (info->rxbuf_ptr >= info->rxbuf_end)
{
disable_irq(info->rxirq); disable_irq(info->rxirq);
/* wakeup any processes waiting in read() */
wake_up_interruptible (&info->rwait); wake_up_interruptible (&info->rwait);
/* and in poll() */ } else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) && (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) == 0))
//wake_up_interruptible(&info->pwait); {
} if (info->rxbuf_end - info->rxbuf_ptr < IFX_SSC_RXREQ_BLOCK_SIZE)
else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) && WRITE_PERIPHERAL_REGISTER ((info->rxbuf_end - info->rxbuf_ptr) << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
(READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) ==
0)) {
// if buffer not filled completely and rx request done initiate new transfer
/*
if (info->rxbuf_end - info->rxbuf_ptr < 65536)
*/
if (info->rxbuf_end - info->rxbuf_ptr <
IFX_SSC_RXREQ_BLOCK_SIZE)
WRITE_PERIPHERAL_REGISTER ((info->rxbuf_end -
info->
rxbuf_ptr) <<
IFX_SSC_RXREQ_RXCOUNT_OFFSET,
info->mapbase +
IFX_SSC_RXREQ);
else else
WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
IFX_SSC_RXREQ_RXCOUNT_OFFSET,
info->mapbase +
IFX_SSC_RXREQ);
} }
} }
@ -266,12 +233,8 @@ tx_int (struct ifx_ssc_port *info)
{ {
int fifo_space, fill, i; int fifo_space, fill, i;
fifo_space = ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_ID) & fifo_space = ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_ID) & IFX_SSC_PERID_TXFS_MASK) >> IFX_SSC_PERID_TXFS_OFFSET)
IFX_SSC_PERID_TXFS_MASK) >> IFX_SSC_PERID_TXFS_OFFSET) - ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_FSTAT) & IFX_SSC_FSTAT_TRANSMIT_WORDS_MASK) >> IFX_SSC_FSTAT_TRANSMIT_WORDS_OFFSET);
-
((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_FSTAT) &
IFX_SSC_FSTAT_TRANSMIT_WORDS_MASK) >>
IFX_SSC_FSTAT_TRANSMIT_WORDS_OFFSET);
if (fifo_space == 0) if (fifo_space == 0)
return; return;
@ -281,44 +244,40 @@ tx_int (struct ifx_ssc_port *info)
if (fill > fifo_space * 4) if (fill > fifo_space * 4)
fill = fifo_space * 4; fill = fifo_space * 4;
for (i = 0; i < fill / 4; i++) { for (i = 0; i < fill / 4; i++)
{
// at first 32 bit access // at first 32 bit access
WRITE_PERIPHERAL_REGISTER (*(UINT32 *) info->txbuf_ptr, WRITE_PERIPHERAL_REGISTER (*(UINT32 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
info->mapbase + IFX_SSC_TB);
info->txbuf_ptr += 4; info->txbuf_ptr += 4;
} }
fifo_space -= fill / 4; fifo_space -= fill / 4;
info->stats.txBytes += fill & ~0x3; info->stats.txBytes += fill & ~0x3;
fill &= 0x3; fill &= 0x3;
if ((fifo_space > 0) & (fill > 1)) { if ((fifo_space > 0) & (fill > 1))
{
// trailing 16 bit access // trailing 16 bit access
WRITE_PERIPHERAL_REGISTER_16 (*(UINT16 *) info->txbuf_ptr, WRITE_PERIPHERAL_REGISTER_16 (*(UINT16 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
info->mapbase + IFX_SSC_TB);
info->txbuf_ptr += 2; info->txbuf_ptr += 2;
info->stats.txBytes += 2; info->stats.txBytes += 2;
fifo_space--; fifo_space--;
/* added by bingtao */
fill -= 2; fill -= 2;
} }
if ((fifo_space > 0) & (fill > 0)) {
if ((fifo_space > 0) & (fill > 0))
{
// trailing 8 bit access // trailing 8 bit access
WRITE_PERIPHERAL_REGISTER_8 (*(UINT8 *) info->txbuf_ptr, WRITE_PERIPHERAL_REGISTER_8 (*(UINT8 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
info->mapbase + IFX_SSC_TB);
info->txbuf_ptr++; info->txbuf_ptr++;
info->stats.txBytes++; info->stats.txBytes++;
/*
fifo_space --;
*/
} }
// check if transmission complete // check if transmission complete
if (info->txbuf_ptr >= info->txbuf_end) { if (info->txbuf_ptr >= info->txbuf_end)
{
disable_irq(info->txirq); disable_irq(info->txirq);
kfree (info->txbuf); kfree (info->txbuf);
info->txbuf = NULL; info->txbuf = NULL;
/* wake up any process waiting in poll() */
//wake_up_interruptible(&info->pwait);
} }
} }
@ -356,30 +315,29 @@ ifx_ssc_err_int (int irq, void *dev_id)
info->stats.rxUnErr++; info->stats.rxUnErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_RX_UFL_ERROR; write_back |= IFX_SSC_WHBSTATE_CLR_RX_UFL_ERROR;
} }
if ((state & IFX_SSC_STATE_RX_OFL) != 0) { if ((state & IFX_SSC_STATE_RX_OFL) != 0) {
info->stats.rxOvErr++; info->stats.rxOvErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_RX_OFL_ERROR; write_back |= IFX_SSC_WHBSTATE_CLR_RX_OFL_ERROR;
} }
if ((state & IFX_SSC_STATE_TX_OFL) != 0) { if ((state & IFX_SSC_STATE_TX_OFL) != 0) {
info->stats.txOvErr++; info->stats.txOvErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_TX_OFL_ERROR; write_back |= IFX_SSC_WHBSTATE_CLR_TX_OFL_ERROR;
} }
if ((state & IFX_SSC_STATE_TX_UFL) != 0) { if ((state & IFX_SSC_STATE_TX_UFL) != 0) {
info->stats.txUnErr++; info->stats.txUnErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_TX_UFL_ERROR; write_back |= IFX_SSC_WHBSTATE_CLR_TX_UFL_ERROR;
} }
// if ((state & IFX_SSC_STATE_ABORT_ERR) != 0) {
// info->stats.abortErr++;
// write_back |= IFX_SSC_WHBSTATE_CLR_ABORT_ERROR;
// }
if ((state & IFX_SSC_STATE_MODE_ERR) != 0) { if ((state & IFX_SSC_STATE_MODE_ERR) != 0) {
info->stats.modeErr++; info->stats.modeErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_MODE_ERROR; write_back |= IFX_SSC_WHBSTATE_CLR_MODE_ERROR;
} }
if (write_back) if (write_back)
WRITE_PERIPHERAL_REGISTER (write_back, WRITE_PERIPHERAL_REGISTER (write_back, info->mapbase + IFX_SSC_WHBSTATE);
info->mapbase + IFX_SSC_WHBSTATE);
local_irq_restore (flags); local_irq_restore (flags);
@ -405,19 +363,16 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
// complete word. The disable cuts the transmission immediatly and // complete word. The disable cuts the transmission immediatly and
// releases the chip selects. This could result in unpredictable // releases the chip selects. This could result in unpredictable
// behavior of connected external devices! // behavior of connected external devices!
enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED) != 0;
& IFX_SSC_STATE_IS_ENABLED) != 0; WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE,
info->mapbase + IFX_SSC_WHBSTATE);
// flush fifos // flush fifos
WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH, WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH, info->mapbase + IFX_SSC_TXFCON);
info->mapbase + IFX_SSC_TXFCON); WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH, info->mapbase + IFX_SSC_RXFCON);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH,
info->mapbase + IFX_SSC_RXFCON);
// free txbuf // free txbuf
if (info->txbuf != NULL) { if (info->txbuf != NULL)
{
kfree (info->txbuf); kfree (info->txbuf);
info->txbuf = NULL; info->txbuf = NULL;
} }
@ -432,12 +387,10 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
mask_and_ack_danube_irq(info->errirq); mask_and_ack_danube_irq(info->errirq);
// clear error flags // clear error flags
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, info->mapbase + IFX_SSC_WHBSTATE);
info->mapbase + IFX_SSC_WHBSTATE);
if (enabled) if (enabled)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
info->mapbase + IFX_SSC_WHBSTATE);
} }
@ -455,8 +408,7 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
if ((inode == (struct inode *) 0) || (inode == (struct inode *) 1)) { if ((inode == (struct inode *) 0) || (inode == (struct inode *) 1)) {
from_kernel = 1; from_kernel = 1;
line = (int) inode; line = (int) inode;
} } else {
else {
line = MINOR (filp->f_dentry->d_inode->i_rdev); line = MINOR (filp->f_dentry->d_inode->i_rdev);
filp->f_op = &ifx_ssc_fops; filp->f_op = &ifx_ssc_fops;
} }
@ -477,40 +429,27 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
disable_irq(info->errirq); disable_irq(info->errirq);
/* Flush and enable TX/RX FIFO */ /* Flush and enable TX/RX FIFO */
WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_TXFIFO_FL << WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, info->mapbase + IFX_SSC_TXFCON);
IFX_SSC_XFCON_ITL_OFFSET) | WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, info->mapbase + IFX_SSC_RXFCON);
IFX_SSC_XFCON_FIFO_FLUSH |
IFX_SSC_XFCON_FIFO_ENABLE,
info->mapbase + IFX_SSC_TXFCON);
WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_RXFIFO_FL <<
IFX_SSC_XFCON_ITL_OFFSET) |
IFX_SSC_XFCON_FIFO_FLUSH |
IFX_SSC_XFCON_FIFO_ENABLE,
info->mapbase + IFX_SSC_RXFCON);
/* logically flush the software FIFOs */ /* logically flush the software FIFOs */
info->rxbuf_ptr = 0; info->rxbuf_ptr = 0;
info->txbuf_ptr = 0; info->txbuf_ptr = 0;
/* clear all error bits */ /* clear all error bits */
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, info->mapbase + IFX_SSC_WHBSTATE);
info->mapbase + IFX_SSC_WHBSTATE);
// clear pending interrupts // clear pending interrupts
mask_and_ack_danube_irq(info->rxirq); mask_and_ack_danube_irq(info->rxirq);
mask_and_ack_danube_irq(info->txirq); mask_and_ack_danube_irq(info->txirq);
mask_and_ack_danube_irq(info->errirq); mask_and_ack_danube_irq(info->errirq);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
info->mapbase + IFX_SSC_WHBSTATE);
return 0; return 0;
} }
EXPORT_SYMBOL (ifx_ssc_open); EXPORT_SYMBOL(ifx_ssc_open);
/*
* This routine is called when a particular device is closed.
*/
int int
ifx_ssc_close (struct inode *inode, struct file *filp) ifx_ssc_close (struct inode *inode, struct file *filp)
{ {
@ -529,26 +468,18 @@ ifx_ssc_close (struct inode *inode, struct file *filp)
if (!info) if (!info)
return -ENXIO; return -ENXIO;
// disable SSC WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE,
info->mapbase + IFX_SSC_WHBSTATE);
// call abort function to disable int's, flush fifos... ifx_ssc_abort(info);
ifx_ssc_abort (info);
info->port_is_open--; info->port_is_open--;
return 0; return 0;
} }
EXPORT_SYMBOL (ifx_ssc_close); EXPORT_SYMBOL(ifx_ssc_close);
/* added by bingtao */
/* helper routine to handle reads from the kernel or user-space */
/* info->rxbuf : never kfree and contains valid data */
/* should be points to NULL after copying data !!! */
static ssize_t static ssize_t
ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len, ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel)
int from_kernel)
{ {
ssize_t ret_val; ssize_t ret_val;
unsigned long flags; unsigned long flags;
@ -561,29 +492,21 @@ ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len,
local_irq_restore (flags); local_irq_restore (flags);
/* Vinetic driver always works in IFX_SSC_MODE_RXTX */ /* Vinetic driver always works in IFX_SSC_MODE_RXTX */
/* TXRX in poll mode */ /* TXRX in poll mode */
while (info->rxbuf_ptr < info->rxbuf_end) { while (info->rxbuf_ptr < info->rxbuf_end)
/* This is the key point, if you don't check this condition {
kfree (NULL) will happen if (info->txbuf_ptr < info->txbuf_end)
because tx only need write into FIFO, it's much fast than rx
So when rx still waiting , tx already finish and release buf
*/
if (info->txbuf_ptr < info->txbuf_end) {
tx_int (info); tx_int (info);
}
rx_int (info); rx_int (info);
}; };
ret_val = info->rxbuf_ptr - info->rxbuf; ret_val = info->rxbuf_ptr - info->rxbuf;
return (ret_val);
return ret_val;
} }
/* helper routine to handle reads from the kernel or user-space */
/* info->rx_buf : never kfree and contains valid data */
/* should be points to NULL after copying data !!! */
static ssize_t static ssize_t
ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len, ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel)
int from_kernel)
{ {
ssize_t ret_val; ssize_t ret_val;
unsigned long flags; unsigned long flags;
@ -591,104 +514,87 @@ ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len,
if (info->opts.modeRxTx == IFX_SSC_MODE_TX) if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
return -EFAULT; return -EFAULT;
local_irq_save (flags); local_irq_save (flags);
info->rxbuf_ptr = info->rxbuf; info->rxbuf_ptr = info->rxbuf;
info->rxbuf_end = info->rxbuf + len; info->rxbuf_end = info->rxbuf + len;
if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX) {
if ((info->txbuf == NULL) || if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX)
(info->txbuf != info->txbuf_ptr) || {
(info->txbuf_end != len + info->txbuf)) { if ((info->txbuf == NULL) || (info->txbuf != info->txbuf_ptr) || (info->txbuf_end != len + info->txbuf))
{
local_irq_restore (flags); local_irq_restore (flags);
printk ("IFX SSC - %s: write must be called before calling " "read in combined RX/TX!\n", __func__); printk ("IFX SSC - %s: write must be called before calling " "read in combined RX/TX!\n", __func__);
return -EFAULT; return -EFAULT;
} }
local_irq_restore (flags);
/* should enable tx, right? */ local_irq_restore(flags);
tx_int (info); tx_int (info);
if (info->txbuf_ptr < info->txbuf_end) if (info->txbuf_ptr < info->txbuf_end)
enable_irq(info->txirq); enable_irq(info->txirq);
enable_irq(info->rxirq); enable_irq(info->rxirq);
} } else {
else { // rx mode local_irq_restore(flags);
local_irq_restore (flags); if (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK)
if (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) &
IFX_SSC_RXCNT_TODO_MASK)
return -EBUSY; return -EBUSY;
enable_irq(info->rxirq); enable_irq(info->rxirq);
// rx request limited to ' bytes
/*
if (len < 65536)
*/
if (len < IFX_SSC_RXREQ_BLOCK_SIZE) if (len < IFX_SSC_RXREQ_BLOCK_SIZE)
WRITE_PERIPHERAL_REGISTER (len << WRITE_PERIPHERAL_REGISTER (len << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
IFX_SSC_RXREQ_RXCOUNT_OFFSET,
info->mapbase +
IFX_SSC_RXREQ);
else else
WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
IFX_SSC_RXREQ_RXCOUNT_OFFSET,
info->mapbase +
IFX_SSC_RXREQ);
} }
__add_wait_queue (&info->rwait, &wait); __add_wait_queue (&info->rwait, &wait);
set_current_state (TASK_INTERRUPTIBLE); set_current_state (TASK_INTERRUPTIBLE);
// wakeup done in rx_int
do { do {
local_irq_save (flags); local_irq_save (flags);
if (info->rxbuf_ptr >= info->rxbuf_end) if (info->rxbuf_ptr >= info->rxbuf_end)
break; break;
local_irq_restore (flags); local_irq_restore (flags);
if (signal_pending (current)) { if (signal_pending (current))
{
ret_val = -ERESTARTSYS; ret_val = -ERESTARTSYS;
goto out; goto out;
} }
schedule (); schedule();
} while (1); } while (1);
ret_val = info->rxbuf_ptr - info->rxbuf; ret_val = info->rxbuf_ptr - info->rxbuf;
local_irq_restore (flags); local_irq_restore (flags);
out: out:
current->state = TASK_RUNNING; current->state = TASK_RUNNING;
__remove_wait_queue (&info->rwait, &wait); __remove_wait_queue (&info->rwait, &wait);
return (ret_val); return (ret_val);
} }
/* helper routine to handle writes to the kernel or user-space */
/* info->txbuf has two cases:
* 1) return value < 0 (-EFAULT), not touched at all
* 2) kfree and points to NULL in interrupt routine (but maybe later )
*/
static ssize_t static ssize_t
ifx_ssc_write_helper (struct ifx_ssc_port *info, const char *buf, ifx_ssc_write_helper (struct ifx_ssc_port *info, const char *buf,
size_t len, int from_kernel) size_t len, int from_kernel)
{ {
// check if in tx or tx/rx mode
if (info->opts.modeRxTx == IFX_SSC_MODE_RX) if (info->opts.modeRxTx == IFX_SSC_MODE_RX)
return -EFAULT; return -EFAULT;
info->txbuf_ptr = info->txbuf; info->txbuf_ptr = info->txbuf;
info->txbuf_end = len + info->txbuf; info->txbuf_end = len + info->txbuf;
/* start the transmission (not in rx/tx, see read helper) */ if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
if (info->opts.modeRxTx == IFX_SSC_MODE_TX) { {
tx_int (info); tx_int (info);
if (info->txbuf_ptr < info->txbuf_end) { if (info->txbuf_ptr < info->txbuf_end)
{
enable_irq(info->txirq); enable_irq(info->txirq);
} }
} }
//local_irq_restore(flags);
return len; return len;
} }
/*
* kernel interfaces for read and write.
* The caller must set port to: n for SSC<m> with n=m-1 (e.g. n=0 for SSC1)
*/
ssize_t ssize_t
ifx_ssc_kread (int port, char *kbuf, size_t len) ifx_ssc_kread (int port, char *kbuf, size_t len)
{ {
@ -703,36 +609,27 @@ ifx_ssc_kread (int port, char *kbuf, size_t len)
info = &isp[port]; info = &isp[port];
// check if reception in progress if (info->rxbuf != NULL)
if (info->rxbuf != NULL) { {
printk ("SSC device busy\n"); printk ("SSC device busy\n");
return -EBUSY; return -EBUSY;
} }
info->rxbuf = kbuf; info->rxbuf = kbuf;
if (info->rxbuf == NULL) { if (info->rxbuf == NULL)
{
printk ("SSC device error\n"); printk ("SSC device error\n");
return -EINVAL; return -EINVAL;
} }
/* changed by bingtao */
/* change by TaiCheng */
//if (!in_irq()){
if (0) {
ret_val = ifx_ssc_read_helper (info, kbuf, len, 1);
}
else {
ret_val = ifx_ssc_read_helper_poll (info, kbuf, len, 1); ret_val = ifx_ssc_read_helper_poll (info, kbuf, len, 1);
};
info->rxbuf = NULL; info->rxbuf = NULL;
// ### TO DO: perhaps warn if ret_val != len
disable_irq(info->rxirq); disable_irq(info->rxirq);
return (ret_val); return ret_val;
} // ifx_ssc_kread }
EXPORT_SYMBOL(ifx_ssc_kread);
EXPORT_SYMBOL (ifx_ssc_kread);
ssize_t ssize_t
ifx_ssc_kwrite (int port, const char *kbuf, size_t len) ifx_ssc_kwrite (int port, const char *kbuf, size_t len)
@ -751,20 +648,18 @@ ifx_ssc_kwrite (int port, const char *kbuf, size_t len)
// check if transmission in progress // check if transmission in progress
if (info->txbuf != NULL) if (info->txbuf != NULL)
return -EBUSY; return -EBUSY;
info->txbuf = (char *) kbuf; info->txbuf = (char *) kbuf;
ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 1); ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 1);
if (ret_val < 0) {
if (ret_val < 0)
info->txbuf = NULL; info->txbuf = NULL;
}
return ret_val; return ret_val;
} }
EXPORT_SYMBOL(ifx_ssc_kwrite);
EXPORT_SYMBOL (ifx_ssc_kwrite);
/*
* user interfaces to read and write
*/
static ssize_t static ssize_t
ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off) ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
{ {
@ -775,7 +670,6 @@ ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
idx = MINOR (filp->f_dentry->d_inode->i_rdev); idx = MINOR (filp->f_dentry->d_inode->i_rdev);
info = &isp[idx]; info = &isp[idx];
// check if reception in progress
if (info->rxbuf != NULL) if (info->rxbuf != NULL)
return -EBUSY; return -EBUSY;
@ -784,7 +678,6 @@ ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
return -ENOMEM; return -ENOMEM;
ret_val = ifx_ssc_read_helper (info, info->rxbuf, len, 0); ret_val = ifx_ssc_read_helper (info, info->rxbuf, len, 0);
// ### TO DO: perhaps warn if ret_val != len
if (copy_to_user ((void *) ubuf, info->rxbuf, ret_val) != 0) if (copy_to_user ((void *) ubuf, info->rxbuf, ret_val) != 0)
ret_val = -EFAULT; ret_val = -EFAULT;
@ -792,14 +685,10 @@ ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
kfree (info->rxbuf); kfree (info->rxbuf);
info->rxbuf = NULL; info->rxbuf = NULL;
return (ret_val); return (ret_val);
} }
/*
* As many bytes as we have free space for are copied from the user
* into txbuf and the actual byte count is returned. The transmission is
* always kicked off by calling the appropriate TX routine.
*/
static ssize_t static ssize_t
ifx_ssc_write (struct file *filp, const char *ubuf, size_t len, loff_t * off) ifx_ssc_write (struct file *filp, const char *ubuf, size_t len, loff_t * off)
{ {
@ -813,7 +702,6 @@ ifx_ssc_write (struct file *filp, const char *ubuf, size_t len, loff_t * off)
idx = MINOR (filp->f_dentry->d_inode->i_rdev); idx = MINOR (filp->f_dentry->d_inode->i_rdev);
info = &isp[idx]; info = &isp[idx];
// check if transmission in progress
if (info->txbuf != NULL) if (info->txbuf != NULL)
return -EBUSY; return -EBUSY;
@ -826,10 +714,13 @@ ifx_ssc_write (struct file *filp, const char *ubuf, size_t len, loff_t * off)
ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 0); ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 0);
else else
ret_val = -EFAULT; ret_val = -EFAULT;
if (ret_val < 0) {
kfree (info->txbuf); // otherwise will be done in ISR if (ret_val < 0)
{
kfree (info->txbuf);
info->txbuf = NULL; info->txbuf = NULL;
} }
return (ret_val); return (ret_val);
} }
@ -841,16 +732,13 @@ ifx_ssc_frm_status_get (struct ifx_ssc_port *info)
tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFSTAT); tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFSTAT);
info->frm_status.DataBusy = (tmp & IFX_SSC_SFSTAT_IN_DATA) > 0; info->frm_status.DataBusy = (tmp & IFX_SSC_SFSTAT_IN_DATA) > 0;
info->frm_status.PauseBusy = (tmp & IFX_SSC_SFSTAT_IN_PAUSE) > 0; info->frm_status.PauseBusy = (tmp & IFX_SSC_SFSTAT_IN_PAUSE) > 0;
info->frm_status.DataCount = (tmp & IFX_SSC_SFSTAT_DATA_COUNT_MASK) info->frm_status.DataCount = (tmp & IFX_SSC_SFSTAT_DATA_COUNT_MASK) >> IFX_SSC_SFSTAT_DATA_COUNT_OFFSET;
>> IFX_SSC_SFSTAT_DATA_COUNT_OFFSET; info->frm_status.PauseCount = (tmp & IFX_SSC_SFSTAT_PAUSE_COUNT_MASK) >> IFX_SSC_SFSTAT_PAUSE_COUNT_OFFSET;
info->frm_status.PauseCount = (tmp & IFX_SSC_SFSTAT_PAUSE_COUNT_MASK)
>> IFX_SSC_SFSTAT_PAUSE_COUNT_OFFSET;
tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON); tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON);
info->frm_status.EnIntAfterData = info->frm_status.EnIntAfterData = (tmp & IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE) > 0;
(tmp & IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE) > 0; info->frm_status.EnIntAfterPause = (tmp & IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE) > 0;
info->frm_status.EnIntAfterPause =
(tmp & IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE) > 0; return &info->frm_status;
return (&info->frm_status);
} }
@ -861,17 +749,13 @@ ifx_ssc_frm_control_get (struct ifx_ssc_port *info)
tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON); tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON);
info->frm_opts.FrameEnable = (tmp & IFX_SSC_SFCON_SF_ENABLE) > 0; info->frm_opts.FrameEnable = (tmp & IFX_SSC_SFCON_SF_ENABLE) > 0;
info->frm_opts.DataLength = (tmp & IFX_SSC_SFCON_DATA_LENGTH_MASK) info->frm_opts.DataLength = (tmp & IFX_SSC_SFCON_DATA_LENGTH_MASK) >> IFX_SSC_SFCON_DATA_LENGTH_OFFSET;
>> IFX_SSC_SFCON_DATA_LENGTH_OFFSET; info->frm_opts.PauseLength = (tmp & IFX_SSC_SFCON_PAUSE_LENGTH_MASK) >> IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET;
info->frm_opts.PauseLength = (tmp & IFX_SSC_SFCON_PAUSE_LENGTH_MASK) info->frm_opts.IdleData = (tmp & IFX_SSC_SFCON_PAUSE_DATA_MASK) >> IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
>> IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET; info->frm_opts.IdleClock = (tmp & IFX_SSC_SFCON_PAUSE_CLOCK_MASK) >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
info->frm_opts.IdleData = (tmp & IFX_SSC_SFCON_PAUSE_DATA_MASK) info->frm_opts.StopAfterPause = (tmp & IFX_SSC_SFCON_STOP_AFTER_PAUSE) > 0;
>> IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
info->frm_opts.IdleClock = (tmp & IFX_SSC_SFCON_PAUSE_CLOCK_MASK) return &info->frm_opts;
>> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
info->frm_opts.StopAfterPause =
(tmp & IFX_SSC_SFCON_STOP_AFTER_PAUSE) > 0;
return (&info->frm_opts);
} }
static int static int
@ -1297,47 +1181,33 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigne
return ret_val; return ret_val;
} }
EXPORT_SYMBOL(ifx_ssc_ioctl);
EXPORT_SYMBOL (ifx_ssc_ioctl);
static int static int
ifx_ssc1_read_proc (char *page, char **start, off_t offset, int count, ifx_ssc1_read_proc (char *page, char **start, off_t offset, int count, int *eof, void *data)
int *eof, void *data)
{ {
int off = 0; int off = 0;
unsigned long flags; unsigned long flags;
/* don't want any interrupts here */
local_save_flags(flags); local_save_flags(flags);
local_irq_disable(); local_irq_disable();
/* print statistics */ off += sprintf (page + off, "Statistics for Infineon Synchronous Serial Controller SSC1\n");
off += sprintf (page + off, off += sprintf (page + off, "RX overflow errors %d\n", isp[0].stats.rxOvErr);
"Statistics for Infineon Synchronous Serial Controller SSC1\n"); off += sprintf (page + off, "RX underflow errors %d\n", isp[0].stats.rxUnErr);
off += sprintf (page + off, "RX overflow errors %d\n", off += sprintf (page + off, "TX overflow errors %d\n", isp[0].stats.txOvErr);
isp[0].stats.rxOvErr); off += sprintf (page + off, "TX underflow errors %d\n", isp[0].stats.txUnErr);
off += sprintf (page + off, "RX underflow errors %d\n", off += sprintf (page + off, "Abort errors %d\n", isp[0].stats.abortErr);
isp[0].stats.rxUnErr);
off += sprintf (page + off, "TX overflow errors %d\n",
isp[0].stats.txOvErr);
off += sprintf (page + off, "TX underflow errors %d\n",
isp[0].stats.txUnErr);
off += sprintf (page + off, "Abort errors %d\n",
isp[0].stats.abortErr);
off += sprintf (page + off, "Mode errors %d\n", isp[0].stats.modeErr); off += sprintf (page + off, "Mode errors %d\n", isp[0].stats.modeErr);
off += sprintf (page + off, "RX Bytes %d\n", isp[0].stats.rxBytes); off += sprintf (page + off, "RX Bytes %d\n", isp[0].stats.rxBytes);
off += sprintf (page + off, "TX Bytes %d\n", isp[0].stats.txBytes); off += sprintf (page + off, "TX Bytes %d\n", isp[0].stats.txBytes);
local_irq_restore(flags); local_irq_restore(flags);
*eof = 1; *eof = 1;
return (off);
return off;
} }
/*
* 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,
* but in ifx_ssc_hwinit() as a result of an IOCTL.
*/
int __init int __init
ifx_ssc_init (void) ifx_ssc_init (void)
{ {
@ -1346,41 +1216,36 @@ ifx_ssc_init (void)
unsigned long flags; unsigned long flags;
int ret_val; int ret_val;
// ### TO DO: dynamic port count evaluation due to pin multiplexing
ret_val = -ENOMEM; ret_val = -ENOMEM;
nbytes = PORT_CNT * sizeof (struct ifx_ssc_port); nbytes = PORT_CNT * sizeof(struct ifx_ssc_port);
isp = (struct ifx_ssc_port *) kmalloc (nbytes, GFP_KERNEL); isp = (struct ifx_ssc_port*)kmalloc(nbytes, GFP_KERNEL);
if (isp == NULL) {
printk ("%s: no memory for isp\n", __func__); if (isp == NULL)
{
printk("%s: no memory for isp\n", __func__);
return (ret_val); return (ret_val);
} }
memset (isp, 0, nbytes); memset(isp, 0, nbytes);
/* register the device */
ret_val = -ENXIO; ret_val = -ENXIO;
/* if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0)
i = maj; {
*/ printk ("Unable to register major %d for the Infineon SSC\n", maj);
if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0) { if (maj == 0)
printk ("Unable to register major %d for the Infineon SSC\n", {
maj);
if (maj == 0) {
goto errout; goto errout;
} } else {
else {
maj = 0; maj = 0;
if ((i = if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0)
register_chrdev (maj, "ssc", {
&ifx_ssc_fops)) < 0) {
printk ("Unable to register major %d for the Infineon SSC\n", maj); printk ("Unable to register major %d for the Infineon SSC\n", maj);
goto errout; goto errout;
} }
} }
} }
if (maj == 0) if (maj == 0)
maj = i; maj = i;
//printk("registered major %d for Infineon SSC\n", maj);
/* set default values in ifx_ssc_port */ /* set default values in ifx_ssc_port */
for (i = 0; i < PORT_CNT; i++) { for (i = 0; i < PORT_CNT; i++) {
@ -1409,61 +1274,45 @@ ifx_ssc_init (void)
/* values specific to SSC1 */ /* values specific to SSC1 */
if (i == 0) { if (i == 0) {
info->mapbase = DANUBE_SSC1_BASE_ADDR; info->mapbase = DANUBE_SSC1_BASE_ADDR;
// ### TO DO: power management
// setting interrupt vectors
info->txirq = DANUBE_SSC_TIR; info->txirq = DANUBE_SSC_TIR;
info->rxirq = DANUBE_SSC_RIR; info->rxirq = DANUBE_SSC_RIR;
info->errirq = DANUBE_SSC_EIR; info->errirq = DANUBE_SSC_EIR;
/*
info->frmirq = IFX_SSC_FIR;
*/
} }
/* activate SSC */
/* CLC.DISS = 0 */
WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_RMC <<
IFX_CLC_RUN_DIVIDER_OFFSET,
info->mapbase + IFX_SSC_CLC);
// ### TO DO: multiple instances WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_RMC << IFX_CLC_RUN_DIVIDER_OFFSET, info->mapbase + IFX_SSC_CLC);
init_waitqueue_head (&info->rwait); init_waitqueue_head (&info->rwait);
//init_waitqueue_head(&info->pwait);
local_irq_save (flags); local_irq_save (flags);
// init serial framing register // init serial framing register
WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_SFCON, WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_SFCON, info->mapbase + IFX_SSC_SFCON);
info->mapbase + IFX_SSC_SFCON);
/* try to get the interrupts */ ret_val = request_irq(info->txirq, ifx_ssc_tx_int, SA_INTERRUPT, "ifx_ssc_tx", info);
// ### TO DO: interrupt handling with multiple instances if (ret_val)
ret_val = {
request_irq(info->txirq, ifx_ssc_tx_int, SA_INTERRUPT, "ifx_ssc_tx", info); printk("%s: unable to get irq %d\n", __func__, info->txirq);
if (ret_val) { local_irq_restore(flags);
printk ("%s: unable to get irq %d\n", __func__,
info->txirq);
local_irq_restore (flags);
goto errout; goto errout;
} }
ret_val =
request_irq(info->rxirq, ifx_ssc_rx_int, SA_INTERRUPT, "ifx_ssc_rx", info); ret_val = request_irq(info->rxirq, ifx_ssc_rx_int, SA_INTERRUPT, "ifx_ssc_rx", info);
if (ret_val) { if (ret_val)
printk ("%s: unable to get irq %d\n", __func__, {
info->rxirq); printk ("%s: unable to get irq %d\n", __func__, info->rxirq);
local_irq_restore (flags); local_irq_restore (flags);
goto irqerr; goto irqerr;
} }
ret_val =
request_irq(info->errirq, ifx_ssc_err_int, SA_INTERRUPT,"ifx_ssc_err", info); ret_val = request_irq(info->errirq, ifx_ssc_err_int, SA_INTERRUPT,"ifx_ssc_err", info);
if (ret_val) { if (ret_val)
printk ("%s: unable to get irq %d\n", __func__, {
info->errirq); printk ("%s: unable to get irq %d\n", __func__, info->errirq);
local_irq_restore (flags); local_irq_restore (flags);
goto irqerr; goto irqerr;
} }
WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_IRNEN, WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_IRNEN, info->mapbase + IFX_SSC_IRN_EN);
info->mapbase + IFX_SSC_IRN_EN);
enable_irq(info->txirq); enable_irq(info->txirq);
enable_irq(info->rxirq); enable_irq(info->rxirq);
enable_irq(info->errirq); enable_irq(info->errirq);
@ -1471,53 +1320,41 @@ ifx_ssc_init (void)
local_irq_restore (flags); local_irq_restore (flags);
} }
/* init the SSCs with default values */
for (i = 0; i < PORT_CNT; i++) { for (i = 0; i < PORT_CNT; i++) {
info = &isp[i]; info = &isp[i];
if (ifx_ssc_hwinit (info) < 0) { if (ifx_ssc_hwinit (info) < 0)
printk ("%s: hardware init failed for port %d\n", {
__func__, i); printk ("%s: hardware init failed for port %d\n", __func__, i);
goto irqerr; goto irqerr;
} }
} }
/* register /proc read handler */ create_proc_read_entry ("driver/ssc1", 0, NULL, ifx_ssc1_read_proc, NULL);
// ### TO DO: multiple instances
/* for SSC1, which is always present */
create_proc_read_entry ("driver/ssc1", 0, NULL, ifx_ssc1_read_proc,
NULL);
return 0; return 0;
irqerr: irqerr:
// ### TO DO: multiple instances
free_irq(isp[0].txirq, &isp[0]); free_irq(isp[0].txirq, &isp[0]);
free_irq(isp[0].rxirq, &isp[0]); free_irq(isp[0].rxirq, &isp[0]);
free_irq(isp[0].errirq, &isp[0]); free_irq(isp[0].errirq, &isp[0]);
errout: errout:
/* free up any allocated memory in the error case */
kfree (isp); kfree (isp);
return (ret_val); return (ret_val);
} /* ifx_ssc_init */ }
void void
ifx_ssc_cleanup_module (void) ifx_ssc_cleanup_module (void)
{ {
int i; int i;
/* free up any allocated memory */
for (i = 0; i < PORT_CNT; i++) { for (i = 0; i < PORT_CNT; i++) {
/* disable the SSC */ WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, isp[i].mapbase + IFX_SSC_WHBSTATE);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE,
isp[i].mapbase + IFX_SSC_WHBSTATE);
/* free the interrupts */
free_irq(isp[i].txirq, &isp[i]); free_irq(isp[i].txirq, &isp[i]);
free_irq(isp[i].rxirq, &isp[i]); free_irq(isp[i].rxirq, &isp[i]);
free_irq(isp[i].errirq, &isp[i]); free_irq(isp[i].errirq, &isp[i]);
} }
kfree (isp); kfree (isp);
/* delete /proc read handler */
remove_proc_entry ("driver/ssc1", NULL); remove_proc_entry ("driver/ssc1", NULL);
remove_proc_entry ("driver/ssc2", NULL);
} }
module_init(ifx_ssc_init); module_init(ifx_ssc_init);