summaryrefslogtreecommitdiffstats
path: root/target/linux/danube
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/danube')
-rw-r--r--target/linux/danube/files/drivers/char/danube_ssc.c547
1 files changed, 192 insertions, 355 deletions
diff --git a/target/linux/danube/files/drivers/char/danube_ssc.c b/target/linux/danube/files/drivers/char/danube_ssc.c
index c19843f25..1f90dac59 100644
--- a/target/linux/danube/files/drivers/char/danube_ssc.c
+++ b/target/linux/danube/files/drivers/char/danube_ssc.c
@@ -107,17 +107,16 @@ static struct file_operations ifx_ssc_fops = {
static inline unsigned int
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;
- rmc = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CLC) &
- IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET;
- if (rmc == 0) {
+ rmc = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CLC) & IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET;
+ if (rmc == 0)
+ {
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
@@ -141,27 +140,27 @@ do_softint (void *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);
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);
- }
- 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);
- }
- 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);
- }
#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);
- }
#endif
-} /* do_softint */
-#endif /* IFX_SSC_INT_USE_BH */
-#endif // not_yet
+}
+#endif
+#endif
inline static void
rx_int (struct ifx_ssc_port *info)
@@ -171,10 +170,7 @@ rx_int (struct ifx_ssc_port *info)
unsigned long *tmp_ptr;
unsigned int rx_valid_cnt;
/* number of words waiting in the RX FIFO */
- fifo_fill_lev = (READ_PERIPHERAL_REGISTER (info->mapbase +
- IFX_SSC_FSTAT) &
- IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >>
- IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET;
+ fifo_fill_lev = (READ_PERIPHERAL_REGISTER (info->mapbase + 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
// 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
@@ -191,73 +187,44 @@ rx_int (struct ifx_ssc_port *info)
// transfer with 32 bits per entry
while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0)) {
tmp_ptr = (unsigned long *) info->rxbuf_ptr;
- *tmp_ptr =
- READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
+ *tmp_ptr = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
info->rxbuf_ptr += 4;
info->stats.rxBytes += 4;
fifo_fill_lev--;
bytes_in_buf -= 4;
- } // while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0))
+ }
+
// now do the rest as mentioned in STATE.RXBV
while ((bytes_in_buf > 0) && (fifo_fill_lev > 0)) {
- 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;
+ 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;
if (rx_valid_cnt == 0)
break;
- if (rx_valid_cnt > bytes_in_buf) {
- // ### TO DO: warning message: not block aligned data, other data
- // in this entry will be lost
+
+ if (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++) {
- *info->rxbuf_ptr =
- (tmp_val >> (8 * (rx_valid_cnt - i - 1))) &
- 0xff;
-/*
- *info->rxbuf_ptr = tmp_val & 0xff;
- tmp_val >>= 8;
-*/
- bytes_in_buf--;
+ tmp_val = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
+
+ for (i = 0; i < rx_valid_cnt; i++)
+ {
+ *info->rxbuf_ptr = (tmp_val >> (8 * (rx_valid_cnt - i - 1))) & 0xff;
+ bytes_in_buf--;
info->rxbuf_ptr++;
}
info->stats.rxBytes += rx_valid_cnt;
- } // while ((bytes_in_buf > 0) && (fifo_fill_lev > 0))
+ }
// check if transfer is complete
- if (info->rxbuf_ptr >= info->rxbuf_end) {
+ if (info->rxbuf_ptr >= info->rxbuf_end)
+ {
disable_irq(info->rxirq);
- /* wakeup any processes waiting in read() */
wake_up_interruptible (&info->rwait);
- /* and in poll() */
- //wake_up_interruptible(&info->pwait);
- }
- else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) &&
- (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 if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) && (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) == 0))
+ {
+ 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
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE <<
- IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase +
- IFX_SSC_RXREQ);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << 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;
- fifo_space = ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_ID) &
- 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);
+ fifo_space = ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_ID) & 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);
if (fifo_space == 0)
return;
@@ -281,44 +244,40 @@ tx_int (struct ifx_ssc_port *info)
if (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
- WRITE_PERIPHERAL_REGISTER (*(UINT32 *) info->txbuf_ptr,
- info->mapbase + IFX_SSC_TB);
+ WRITE_PERIPHERAL_REGISTER (*(UINT32 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
info->txbuf_ptr += 4;
}
fifo_space -= fill / 4;
info->stats.txBytes += fill & ~0x3;
fill &= 0x3;
- if ((fifo_space > 0) & (fill > 1)) {
+ if ((fifo_space > 0) & (fill > 1))
+ {
// trailing 16 bit access
- WRITE_PERIPHERAL_REGISTER_16 (*(UINT16 *) info->txbuf_ptr,
- info->mapbase + IFX_SSC_TB);
+ WRITE_PERIPHERAL_REGISTER_16 (*(UINT16 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
info->txbuf_ptr += 2;
info->stats.txBytes += 2;
fifo_space--;
-/* added by bingtao */
fill -= 2;
}
- if ((fifo_space > 0) & (fill > 0)) {
+
+ if ((fifo_space > 0) & (fill > 0))
+ {
// trailing 8 bit access
- WRITE_PERIPHERAL_REGISTER_8 (*(UINT8 *) info->txbuf_ptr,
- info->mapbase + IFX_SSC_TB);
+ WRITE_PERIPHERAL_REGISTER_8 (*(UINT8 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
info->txbuf_ptr++;
info->stats.txBytes++;
-/*
- fifo_space --;
-*/
}
// check if transmission complete
- if (info->txbuf_ptr >= info->txbuf_end) {
+ if (info->txbuf_ptr >= info->txbuf_end)
+ {
disable_irq(info->txirq);
kfree (info->txbuf);
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++;
write_back |= IFX_SSC_WHBSTATE_CLR_RX_UFL_ERROR;
}
+
if ((state & IFX_SSC_STATE_RX_OFL) != 0) {
info->stats.rxOvErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_RX_OFL_ERROR;
}
+
if ((state & IFX_SSC_STATE_TX_OFL) != 0) {
info->stats.txOvErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_TX_OFL_ERROR;
}
+
if ((state & IFX_SSC_STATE_TX_UFL) != 0) {
info->stats.txUnErr++;
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) {
info->stats.modeErr++;
write_back |= IFX_SSC_WHBSTATE_CLR_MODE_ERROR;
}
if (write_back)
- WRITE_PERIPHERAL_REGISTER (write_back,
- info->mapbase + IFX_SSC_WHBSTATE);
+ WRITE_PERIPHERAL_REGISTER (write_back, info->mapbase + IFX_SSC_WHBSTATE);
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
// releases the chip selects. This could result in unpredictable
// behavior of connected external devices!
- enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE)
- & IFX_SSC_STATE_IS_ENABLED) != 0;
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
+ enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED) != 0;
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
// flush fifos
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH,
- 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_TXFCON);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH, info->mapbase + IFX_SSC_RXFCON);
// free txbuf
- if (info->txbuf != NULL) {
+ if (info->txbuf != NULL)
+ {
kfree (info->txbuf);
info->txbuf = NULL;
}
@@ -432,12 +387,10 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
mask_and_ack_danube_irq(info->errirq);
// clear error flags
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR,
- info->mapbase + IFX_SSC_WHBSTATE);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, info->mapbase + IFX_SSC_WHBSTATE);
if (enabled)
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, 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)) {
from_kernel = 1;
line = (int) inode;
- }
- else {
+ } else {
line = MINOR (filp->f_dentry->d_inode->i_rdev);
filp->f_op = &ifx_ssc_fops;
}
@@ -477,40 +429,27 @@ ifx_ssc_open (struct inode *inode, struct file *filp)
disable_irq(info->errirq);
/* Flush and enable TX/RX FIFO */
- 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);
- 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);
+ 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);
+ 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 */
info->rxbuf_ptr = 0;
info->txbuf_ptr = 0;
/* clear all error bits */
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR,
- info->mapbase + IFX_SSC_WHBSTATE);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, info->mapbase + IFX_SSC_WHBSTATE);
// clear pending interrupts
mask_and_ack_danube_irq(info->rxirq);
mask_and_ack_danube_irq(info->txirq);
mask_and_ack_danube_irq(info->errirq);
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE,
- info->mapbase + IFX_SSC_WHBSTATE);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
return 0;
}
-EXPORT_SYMBOL (ifx_ssc_open);
+EXPORT_SYMBOL(ifx_ssc_open);
-/*
- * This routine is called when a particular device is closed.
- */
int
ifx_ssc_close (struct inode *inode, struct file *filp)
{
@@ -529,26 +468,18 @@ ifx_ssc_close (struct inode *inode, struct file *filp)
if (!info)
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--;
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
-ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len,
- int from_kernel)
+ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel)
{
ssize_t ret_val;
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);
/* Vinetic driver always works in IFX_SSC_MODE_RXTX */
/* TXRX in poll mode */
- while (info->rxbuf_ptr < info->rxbuf_end) {
- /* This is the key point, if you don't check this condition
- kfree (NULL) will happen
- 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) {
+ while (info->rxbuf_ptr < info->rxbuf_end)
+ {
+ if (info->txbuf_ptr < info->txbuf_end)
tx_int (info);
- }
rx_int (info);
};
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
-ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len,
- int from_kernel)
+ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel)
{
ssize_t ret_val;
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)
return -EFAULT;
+
local_irq_save (flags);
info->rxbuf_ptr = info->rxbuf;
info->rxbuf_end = info->rxbuf + len;
- if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX) {
- if ((info->txbuf == NULL) ||
- (info->txbuf != info->txbuf_ptr) ||
- (info->txbuf_end != len + info->txbuf)) {
+
+ if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX)
+ {
+ if ((info->txbuf == NULL) || (info->txbuf != info->txbuf_ptr) || (info->txbuf_end != len + info->txbuf))
+ {
local_irq_restore (flags);
printk ("IFX SSC - %s: write must be called before calling " "read in combined RX/TX!\n", __func__);
return -EFAULT;
}
- local_irq_restore (flags);
- /* should enable tx, right? */
+
+ local_irq_restore(flags);
tx_int (info);
+
if (info->txbuf_ptr < info->txbuf_end)
enable_irq(info->txirq);
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)
+ } else {
+ local_irq_restore(flags);
+ if (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK)
return -EBUSY;
enable_irq(info->rxirq);
- // rx request limited to ' bytes
-/*
- if (len < 65536)
-*/
if (len < IFX_SSC_RXREQ_BLOCK_SIZE)
- WRITE_PERIPHERAL_REGISTER (len <<
- IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase +
- IFX_SSC_RXREQ);
+ WRITE_PERIPHERAL_REGISTER (len << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
else
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE <<
- IFX_SSC_RXREQ_RXCOUNT_OFFSET,
- info->mapbase +
- IFX_SSC_RXREQ);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
}
__add_wait_queue (&info->rwait, &wait);
set_current_state (TASK_INTERRUPTIBLE);
- // wakeup done in rx_int
do {
local_irq_save (flags);
if (info->rxbuf_ptr >= info->rxbuf_end)
break;
+
local_irq_restore (flags);
- if (signal_pending (current)) {
+ if (signal_pending (current))
+ {
ret_val = -ERESTARTSYS;
goto out;
}
- schedule ();
+ schedule();
} while (1);
ret_val = info->rxbuf_ptr - info->rxbuf;
local_irq_restore (flags);
- out:
+out:
current->state = TASK_RUNNING;
__remove_wait_queue (&info->rwait, &wait);
+
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
ifx_ssc_write_helper (struct ifx_ssc_port *info, const char *buf,
size_t len, int from_kernel)
{
- // check if in tx or tx/rx mode
if (info->opts.modeRxTx == IFX_SSC_MODE_RX)
return -EFAULT;
info->txbuf_ptr = 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);
- if (info->txbuf_ptr < info->txbuf_end) {
+ if (info->txbuf_ptr < info->txbuf_end)
+ {
enable_irq(info->txirq);
}
}
- //local_irq_restore(flags);
+
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
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];
- // check if reception in progress
- if (info->rxbuf != NULL) {
+ if (info->rxbuf != NULL)
+ {
printk ("SSC device busy\n");
return -EBUSY;
}
info->rxbuf = kbuf;
- if (info->rxbuf == NULL) {
+ if (info->rxbuf == NULL)
+ {
printk ("SSC device error\n");
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;
- // ### TO DO: perhaps warn if ret_val != len
disable_irq(info->rxirq);
- return (ret_val);
-} // ifx_ssc_kread
-
-EXPORT_SYMBOL (ifx_ssc_kread);
+ return ret_val;
+}
+EXPORT_SYMBOL(ifx_ssc_kread);
ssize_t
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
if (info->txbuf != NULL)
return -EBUSY;
+
info->txbuf = (char *) kbuf;
ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 1);
- if (ret_val < 0) {
+
+ if (ret_val < 0)
info->txbuf = NULL;
- }
+
return ret_val;
}
+EXPORT_SYMBOL(ifx_ssc_kwrite);
-EXPORT_SYMBOL (ifx_ssc_kwrite);
-
-/*
- * user interfaces to read and write
- */
static ssize_t
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);
info = &isp[idx];
- // check if reception in progress
if (info->rxbuf != NULL)
return -EBUSY;
@@ -784,7 +678,6 @@ ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
return -ENOMEM;
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)
ret_val = -EFAULT;
@@ -792,14 +685,10 @@ ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
kfree (info->rxbuf);
info->rxbuf = NULL;
+
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
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);
info = &isp[idx];
- // check if transmission in progress
if (info->txbuf != NULL)
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);
else
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;
}
+
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);
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.DataCount = (tmp & IFX_SSC_SFSTAT_DATA_COUNT_MASK)
- >> 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.DataCount = (tmp & IFX_SSC_SFSTAT_DATA_COUNT_MASK) >> IFX_SSC_SFSTAT_DATA_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);
- info->frm_status.EnIntAfterData =
- (tmp & IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE) > 0;
- info->frm_status.EnIntAfterPause =
- (tmp & IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE) > 0;
- return (&info->frm_status);
+ info->frm_status.EnIntAfterData = (tmp & IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE) > 0;
+ info->frm_status.EnIntAfterPause = (tmp & IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE) > 0;
+
+ 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);
info->frm_opts.FrameEnable = (tmp & IFX_SSC_SFCON_SF_ENABLE) > 0;
- info->frm_opts.DataLength = (tmp & IFX_SSC_SFCON_DATA_LENGTH_MASK)
- >> 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.IdleData = (tmp & IFX_SSC_SFCON_PAUSE_DATA_MASK)
- >> IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
- info->frm_opts.IdleClock = (tmp & IFX_SSC_SFCON_PAUSE_CLOCK_MASK)
- >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
- info->frm_opts.StopAfterPause =
- (tmp & IFX_SSC_SFCON_STOP_AFTER_PAUSE) > 0;
- return (&info->frm_opts);
+ info->frm_opts.DataLength = (tmp & IFX_SSC_SFCON_DATA_LENGTH_MASK) >> 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.IdleData = (tmp & IFX_SSC_SFCON_PAUSE_DATA_MASK) >> IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
+ info->frm_opts.IdleClock = (tmp & IFX_SSC_SFCON_PAUSE_CLOCK_MASK) >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
+ info->frm_opts.StopAfterPause = (tmp & IFX_SSC_SFCON_STOP_AFTER_PAUSE) > 0;
+
+ return &info->frm_opts;
}
static int
@@ -1297,47 +1181,33 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigne
return ret_val;
}
-
-EXPORT_SYMBOL (ifx_ssc_ioctl);
+EXPORT_SYMBOL(ifx_ssc_ioctl);
static int
-ifx_ssc1_read_proc (char *page, char **start, off_t offset, int count,
- int *eof, void *data)
+ifx_ssc1_read_proc (char *page, char **start, off_t offset, int count, int *eof, void *data)
{
int off = 0;
unsigned long flags;
- /* don't want any interrupts here */
local_save_flags(flags);
local_irq_disable();
- /* print statistics */
- off += sprintf (page + off,
- "Statistics for Infineon Synchronous Serial Controller SSC1\n");
- off += sprintf (page + off, "RX overflow errors %d\n",
- isp[0].stats.rxOvErr);
- off += sprintf (page + off, "RX underflow errors %d\n",
- 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, "Statistics for Infineon Synchronous Serial Controller SSC1\n");
+ off += sprintf (page + off, "RX overflow errors %d\n", isp[0].stats.rxOvErr);
+ off += sprintf (page + off, "RX underflow errors %d\n", 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, "RX Bytes %d\n", isp[0].stats.rxBytes);
off += sprintf (page + off, "TX Bytes %d\n", isp[0].stats.txBytes);
local_irq_restore(flags);
*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
ifx_ssc_init (void)
{
@@ -1346,41 +1216,36 @@ ifx_ssc_init (void)
unsigned long flags;
int ret_val;
- // ### TO DO: dynamic port count evaluation due to pin multiplexing
-
ret_val = -ENOMEM;
- nbytes = PORT_CNT * sizeof (struct ifx_ssc_port);
- isp = (struct ifx_ssc_port *) kmalloc (nbytes, GFP_KERNEL);
- if (isp == NULL) {
- printk ("%s: no memory for isp\n", __func__);
+ nbytes = PORT_CNT * sizeof(struct ifx_ssc_port);
+ isp = (struct ifx_ssc_port*)kmalloc(nbytes, GFP_KERNEL);
+
+ if (isp == NULL)
+ {
+ printk("%s: no memory for isp\n", __func__);
return (ret_val);
}
- memset (isp, 0, nbytes);
+ memset(isp, 0, nbytes);
- /* register the device */
ret_val = -ENXIO;
-/*
- i = maj;
-*/
- if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0) {
- printk ("Unable to register major %d for the Infineon SSC\n",
- maj);
- if (maj == 0) {
+ if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0)
+ {
+ printk ("Unable to register major %d for the Infineon SSC\n", maj);
+ if (maj == 0)
+ {
goto errout;
- }
- else {
+ } else {
maj = 0;
- if ((i =
- register_chrdev (maj, "ssc",
- &ifx_ssc_fops)) < 0) {
+ if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0)
+ {
printk ("Unable to register major %d for the Infineon SSC\n", maj);
goto errout;
}
}
}
+
if (maj == 0)
maj = i;
- //printk("registered major %d for Infineon SSC\n", maj);
/* set default values in ifx_ssc_port */
for (i = 0; i < PORT_CNT; i++) {
@@ -1409,61 +1274,45 @@ ifx_ssc_init (void)
/* values specific to SSC1 */
if (i == 0) {
info->mapbase = DANUBE_SSC1_BASE_ADDR;
- // ### TO DO: power management
-
- // setting interrupt vectors
info->txirq = DANUBE_SSC_TIR;
info->rxirq = DANUBE_SSC_RIR;
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->pwait);
local_irq_save (flags);
// init serial framing register
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_SFCON,
- info->mapbase + IFX_SSC_SFCON);
-
- /* try to get the interrupts */
- // ### TO DO: interrupt handling with multiple instances
- ret_val =
- 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", __func__,
- info->txirq);
- local_irq_restore (flags);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_SFCON, info->mapbase + IFX_SSC_SFCON);
+
+ ret_val = 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", __func__, info->txirq);
+ local_irq_restore(flags);
goto errout;
}
- ret_val =
- 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", __func__,
- info->rxirq);
+
+ ret_val = 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", __func__, info->rxirq);
local_irq_restore (flags);
goto irqerr;
}
- ret_val =
- 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", __func__,
- info->errirq);
+
+ ret_val = 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", __func__, info->errirq);
local_irq_restore (flags);
goto irqerr;
}
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_IRNEN,
- info->mapbase + IFX_SSC_IRN_EN);
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_IRNEN, info->mapbase + IFX_SSC_IRN_EN);
+
enable_irq(info->txirq);
enable_irq(info->rxirq);
enable_irq(info->errirq);
@@ -1471,53 +1320,41 @@ ifx_ssc_init (void)
local_irq_restore (flags);
}
- /* init the SSCs with default values */
for (i = 0; i < PORT_CNT; i++) {
info = &isp[i];
- if (ifx_ssc_hwinit (info) < 0) {
- printk ("%s: hardware init failed for port %d\n",
- __func__, i);
+ if (ifx_ssc_hwinit (info) < 0)
+ {
+ printk ("%s: hardware init failed for port %d\n", __func__, i);
goto irqerr;
}
}
- /* register /proc read handler */
- // ### TO DO: multiple instances
- /* for SSC1, which is always present */
- create_proc_read_entry ("driver/ssc1", 0, NULL, ifx_ssc1_read_proc,
- NULL);
+ create_proc_read_entry ("driver/ssc1", 0, NULL, ifx_ssc1_read_proc, NULL);
+
return 0;
irqerr:
- // ### TO DO: multiple instances
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);
-} /* ifx_ssc_init */
+}
void
ifx_ssc_cleanup_module (void)
{
int i;
- /* free up any allocated memory */
for (i = 0; i < PORT_CNT; i++) {
- /* disable the SSC */
- WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE,
- isp[i].mapbase + IFX_SSC_WHBSTATE);
- /* free the interrupts */
+ WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, isp[i].mapbase + IFX_SSC_WHBSTATE);
free_irq(isp[i].txirq, &isp[i]);
free_irq(isp[i].rxirq, &isp[i]);
free_irq(isp[i].errirq, &isp[i]);
}
kfree (isp);
- /* delete /proc read handler */
remove_proc_entry ("driver/ssc1", NULL);
- remove_proc_entry ("driver/ssc2", NULL);
}
module_init(ifx_ssc_init);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 03:34:41 +0000