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danube ssc cleanup

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SVN-Revision: 9766
This commit is contained in:
John Crispin 2007-12-15 16:31:43 +00:00
parent af837fcb5c
commit bad4fdd1f5
1 changed files with 128 additions and 226 deletions
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354
target/linux/danube/files/drivers/char/danube_ssc.c
View file

@ -92,7 +92,6 @@ int ifx_ssc_close (struct inode *, struct file *);
static unsigned int ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info);
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);
extern unsigned int danube_get_fpi_hz (void);
extern void mask_and_ack_danube_irq (unsigned int irq_nr);
@ -600,7 +599,7 @@ ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len,
(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", __FUNCTION__);
printk ("IFX SSC - %s: write must be called before calling " "read in combined RX/TX!\n", __func__);
return -EFAULT;
}
local_irq_restore (flags);
@ -773,10 +772,6 @@ ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
int idx;
struct ifx_ssc_port *info;
/*
if (len == 0)
return (0);
*/
idx = MINOR (filp->f_dentry->d_inode->i_rdev);
info = &isp[idx];
@ -885,36 +880,28 @@ ifx_ssc_frm_control_set (struct ifx_ssc_port *info)
unsigned long tmp;
// check parameters
if ((info->frm_opts.DataLength > IFX_SSC_SFCON_DATA_LENGTH_MAX) ||
(info->frm_opts.DataLength < 1) ||
(info->frm_opts.PauseLength > IFX_SSC_SFCON_PAUSE_LENGTH_MAX) ||
(info->frm_opts.PauseLength < 1) ||
((info->frm_opts.IdleData & ~(IFX_SSC_SFCON_PAUSE_DATA_MASK >>
IFX_SSC_SFCON_PAUSE_DATA_OFFSET)) !=
0)
||
((info->frm_opts.
IdleClock & ~(IFX_SSC_SFCON_PAUSE_CLOCK_MASK >>
IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET)) != 0))
if ((info->frm_opts.DataLength > IFX_SSC_SFCON_DATA_LENGTH_MAX)
|| (info->frm_opts.DataLength < 1)
|| (info->frm_opts.PauseLength > IFX_SSC_SFCON_PAUSE_LENGTH_MAX)
|| (info->frm_opts.PauseLength < 1)
|| (info->frm_opts.IdleData & ~(IFX_SSC_SFCON_PAUSE_DATA_MASK >> IFX_SSC_SFCON_PAUSE_DATA_OFFSET))
|| (info->frm_opts.IdleClock & ~(IFX_SSC_SFCON_PAUSE_CLOCK_MASK >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET)))
return -EINVAL;
// read interrupt bits (they're not changed here)
tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON) &
(IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE |
IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE);
(IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE | IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE);
// set all values with respect to it's bit position (for data and pause
// length set N-1)
tmp = (info->frm_opts.DataLength -
1) << IFX_SSC_SFCON_DATA_LENGTH_OFFSET;
tmp |= (info->frm_opts.PauseLength -
1) << IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET;
tmp = (info->frm_opts.DataLength - 1) << IFX_SSC_SFCON_DATA_LENGTH_OFFSET;
tmp |= (info->frm_opts.PauseLength - 1) << IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET;
tmp |= info->frm_opts.IdleData << IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
tmp |= info->frm_opts.IdleClock << IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
tmp |= info->frm_opts.FrameEnable * IFX_SSC_SFCON_SF_ENABLE;
tmp |= info->frm_opts.StopAfterPause * IFX_SSC_SFCON_STOP_AFTER_PAUSE;
WRITE_PERIPHERAL_REGISTER (tmp, info->mapbase + IFX_SSC_SFCON);
WRITE_PERIPHERAL_REGISTER(tmp, info->mapbase + IFX_SSC_SFCON);
return 0;
}
@ -924,65 +911,33 @@ ifx_ssc_rxtx_mode_set (struct ifx_ssc_port *info, unsigned int val)
{
unsigned long tmp;
// check parameters
if (!(info) || (val & ~(IFX_SSC_MODE_MASK)))
return -EINVAL;
/*check BUSY and RXCNT */
if (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) &
IFX_SSC_STATE_BUSY
|| READ_PERIPHERAL_REGISTER (info->mapbase +
IFX_SSC_RXCNT) &
IFX_SSC_RXCNT_TODO_MASK)
if ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_BUSY)
|| (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK))
return -EBUSY;
// modify
tmp = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CON) &
~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF)) | (val);
tmp = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CON) & ~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF)) | (val);
WRITE_PERIPHERAL_REGISTER (tmp, info->mapbase + IFX_SSC_CON);
info->opts.modeRxTx = val;
return 0;
}
void
ifx_gpio_init (void)
{
/* TODO: P0.9 SPI_CS4, P0.10 SPI_CS5, P 0.11 SPI_CS6, because of ASC0 */
/* p0.15 SPI_CS1(EEPROM), P0.13 SPI_CS3, */
/* Set p0.15 to alternative 01, others to 00 (In/OUT) */
*(DANUBE_GPIO_P0_DIR) = (*DANUBE_GPIO_P0_DIR) | (0xA000);
*(DANUBE_GPIO_P0_ALTSEL0) =
(((*DANUBE_GPIO_P0_ALTSEL0) | (0x8000)) & (~(0x2000)));
*(DANUBE_GPIO_P0_ALTSEL1) =
(((*DANUBE_GPIO_P0_ALTSEL1) & (~0x8000)) & (~(0x2000)));
*(DANUBE_GPIO_P0_OD) = (*DANUBE_GPIO_P0_OD) | 0xA000;
/* p1.6 SPI_CS2(SFLASH), p1.0 SPI_DIN, p1.1 SPI_DOUT, p1.2 SPI_CLK */
*(DANUBE_GPIO_P1_DIR) = ((*DANUBE_GPIO_P1_DIR) | (0x46)) & (~1);
*(DANUBE_GPIO_P1_ALTSEL0) = ((*DANUBE_GPIO_P1_ALTSEL0) | (0x47));
*(DANUBE_GPIO_P1_ALTSEL1) = (*DANUBE_GPIO_P1_ALTSEL1) & (~0x47);
*(DANUBE_GPIO_P1_OD) = (*DANUBE_GPIO_P1_OD) | 0x0046;
/*CS3 */
/*TODO: CS4 CS5 CS6 */
*DANUBE_GPIO_P0_OUT = ((*DANUBE_GPIO_P0_OUT) | 0x2000);
}
static int
ifx_ssc_sethwopts (struct ifx_ssc_port *info)
{
unsigned long flags, bits;
struct ifx_ssc_hwopts *opts = &info->opts;
/* sanity checks */
if ((opts->dataWidth < IFX_SSC_MIN_DATA_WIDTH) ||
(opts->dataWidth > IFX_SSC_MAX_DATA_WIDTH)) {
printk ("%s: sanity check failed\n", __FUNCTION__);
if ((opts->dataWidth < IFX_SSC_MIN_DATA_WIDTH)
|| (opts->dataWidth > IFX_SSC_MAX_DATA_WIDTH))
return -EINVAL;
}
bits = (opts->dataWidth - 1) << IFX_SSC_CON_DATA_WIDTH_OFFSET;
bits |= IFX_SSC_CON_ENABLE_BYTE_VALID;
// if (opts->abortErrDetect)
// bits |= IFX_SSC_CON_ABORT_ERR_CHECK;
if (opts->rxOvErrDetect)
bits |= IFX_SSC_CON_RX_OFL_CHECK;
if (opts->rxUndErrDetect)
@ -1001,40 +956,53 @@ ifx_ssc_sethwopts (struct ifx_ssc_port *info)
bits |= IFX_SSC_CON_LATCH_THEN_SHIFT;
if (opts->clockPolarity)
bits |= IFX_SSC_CON_CLOCK_FALL;
switch (opts->modeRxTx) {
switch (opts->modeRxTx)
{
case IFX_SSC_MODE_TX:
bits |= IFX_SSC_CON_RX_OFF;
break;
case IFX_SSC_MODE_RX:
bits |= IFX_SSC_CON_TX_OFF;
break;
} // switch (opts->modeRxT)
}
local_irq_save (flags);
WRITE_PERIPHERAL_REGISTER (bits, info->mapbase + IFX_SSC_CON);
WRITE_PERIPHERAL_REGISTER ((info->opts.
gpoCs << IFX_SSC_GPOCON_ISCSB0_POS) |
(info->opts.
gpoInv << IFX_SSC_GPOCON_INVOUT0_POS),
info->mapbase + IFX_SSC_GPOCON);
/*TODO: disable cs */
WRITE_PERIPHERAL_REGISTER (info->opts.
gpoCs << IFX_SSC_WHBGPOSTAT_SETOUT0_POS,
info->mapbase + IFX_SSC_WHBGPOSTAT);
WRITE_PERIPHERAL_REGISTER ((info->opts.gpoCs << IFX_SSC_GPOCON_ISCSB0_POS) |
(info->opts.gpoInv << IFX_SSC_GPOCON_INVOUT0_POS), info->mapbase + IFX_SSC_GPOCON);
WRITE_PERIPHERAL_REGISTER (info->opts.gpoCs << IFX_SSC_WHBGPOSTAT_SETOUT0_POS, info->mapbase + IFX_SSC_WHBGPOSTAT);
//master mode
if (opts->masterSelect) {
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_MASTER_SELECT,
info->mapbase + IFX_SSC_WHBSTATE);
}
else {
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_MASTER_SELECT,
info->mapbase + IFX_SSC_WHBSTATE);
}
if (opts->masterSelect)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_MASTER_SELECT, info->mapbase + IFX_SSC_WHBSTATE);
else
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_MASTER_SELECT, info->mapbase + IFX_SSC_WHBSTATE);
// init serial framing
WRITE_PERIPHERAL_REGISTER (0, info->mapbase + IFX_SSC_SFCON);
/* set up the port pins */
//check for general requirements to switch (external) pad/pin characteristics
ifx_gpio_init ();
/* TODO: P0.9 SPI_CS4, P0.10 SPI_CS5, P 0.11 SPI_CS6, because of ASC0 */
/* p0.15 SPI_CS1(EEPROM), P0.13 SPI_CS3, */
/* Set p0.15 to alternative 01, others to 00 (In/OUT) */
*(DANUBE_GPIO_P0_DIR) = (*DANUBE_GPIO_P0_DIR) | (0xA000);
*(DANUBE_GPIO_P0_ALTSEL0) = (((*DANUBE_GPIO_P0_ALTSEL0) | (0x8000)) & (~(0x2000)));
*(DANUBE_GPIO_P0_ALTSEL1) = (((*DANUBE_GPIO_P0_ALTSEL1) & (~0x8000)) & (~(0x2000)));
*(DANUBE_GPIO_P0_OD) = (*DANUBE_GPIO_P0_OD) | 0xA000;
/* p1.6 SPI_CS2(SFLASH), p1.0 SPI_DIN, p1.1 SPI_DOUT, p1.2 SPI_CLK */
*(DANUBE_GPIO_P1_DIR) = ((*DANUBE_GPIO_P1_DIR) | (0x46)) & (~1);
*(DANUBE_GPIO_P1_ALTSEL0) = ((*DANUBE_GPIO_P1_ALTSEL0) | (0x47));
*(DANUBE_GPIO_P1_ALTSEL1) = (*DANUBE_GPIO_P1_ALTSEL1) & (~0x47);
*(DANUBE_GPIO_P1_OD) = (*DANUBE_GPIO_P1_OD) | 0x0046;
/*CS3 */
/*TODO: CS4 CS5 CS6 */
*DANUBE_GPIO_P0_OUT = ((*DANUBE_GPIO_P0_OUT) | 0x2000);
local_irq_restore (flags);
return 0;
@ -1047,35 +1015,39 @@ ifx_ssc_set_baud (struct ifx_ssc_port *info, unsigned int baud)
unsigned int br;
unsigned long flags;
bool enabled;
int retval = 0;
ifx_ssc_clock = ifx_ssc_get_kernel_clk (info);
ifx_ssc_clock = ifx_ssc_get_kernel_clk(info);
if (ifx_ssc_clock == 0)
return -EINVAL;
local_irq_save (flags);
/* have to disable the SSC to set the baudrate */
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);
{
retval = -EINVAL;
goto out;
}
local_irq_save (flags);
enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
// compute divider
br = (((ifx_ssc_clock >> 1) + baud / 2) / baud) - 1;
wmb();
if (br > 0xffff ||
((br == 0) &&
((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) &
IFX_SSC_STATE_IS_MASTER) == 0))) {
if (br > 0xffff || ((br == 0) &&
((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_MASTER) == 0))) {
local_irq_restore (flags);
printk ("%s: illegal baudrate %u\n", __FUNCTION__, baud);
printk ("%s: invalid baudrate %u\n", __func__, baud);
return -EINVAL;
}
WRITE_PERIPHERAL_REGISTER (br, info->mapbase + IFX_SSC_BR);
if (enabled)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE,
info->mapbase + IFX_SSC_WHBSTATE);
local_irq_restore (flags);
return 0;
WRITE_PERIPHERAL_REGISTER (br, info->mapbase + IFX_SSC_BR);
if (enabled)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
local_irq_restore(flags);
out:
return retval;
}
static int
@ -1084,43 +1056,40 @@ ifx_ssc_hwinit (struct ifx_ssc_port *info)
unsigned long flags;
bool enabled;
/* have to disable the SSC */
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);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
if (ifx_ssc_sethwopts (info) < 0) {
printk ("%s: setting the hardware options failed\n",
__FUNCTION__);
if (ifx_ssc_sethwopts (info) < 0)
{
printk ("%s: setting the hardware options failed\n", __func__);
return -EINVAL;
}
if (ifx_ssc_set_baud (info, info->baud) < 0) {
printk ("%s: setting the baud rate failed\n", __FUNCTION__);
if (ifx_ssc_set_baud (info, info->baud) < 0)
{
printk ("%s: setting the baud rate failed\n", __func__);
return -EINVAL;
}
local_irq_save (flags);
/* TX FIFO */
WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_TXFIFO_FL <<
IFX_SSC_XFCON_ITL_OFFSET) |
IFX_SSC_XFCON_FIFO_ENABLE,
WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE,
info->mapbase + IFX_SSC_TXFCON);
/* RX FIFO */
WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_RXFIFO_FL <<
IFX_SSC_XFCON_ITL_OFFSET) |
IFX_SSC_XFCON_FIFO_ENABLE,
WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE,
info->mapbase + IFX_SSC_RXFCON);
local_irq_restore (flags);
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);
return 0;
}
int
ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long data)
ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data)
{
struct ifx_ssc_port *info;
int line, ret_val = 0;
@ -1128,20 +1097,21 @@ ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long tmp;
int from_kernel = 0;
if ((inode == (struct inode *) 0) || (inode == (struct inode *) 1)) {
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);
}
/* don't use more minor devices than we can support */
if (line < 0 || line >= PORT_CNT)
return -ENXIO;
info = &isp[line];
switch (cmd) {
switch (cmd)
{
case IFX_SSC_STATS_READ:
/* data must be a pointer to a struct ifx_ssc_statistics */
if (from_kernel)
@ -1382,7 +1352,7 @@ ifx_ssc_init (void)
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", __FUNCTION__);
printk ("%s: no memory for isp\n", __func__);
return (ret_val);
}
memset (isp, 0, nbytes);
@ -1471,7 +1441,7 @@ ifx_ssc_init (void)
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", __FUNCTION__,
printk ("%s: unable to get irq %d\n", __func__,
info->txirq);
local_irq_restore (flags);
goto errout;
@ -1479,7 +1449,7 @@ ifx_ssc_init (void)
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", __FUNCTION__,
printk ("%s: unable to get irq %d\n", __func__,
info->rxirq);
local_irq_restore (flags);
goto irqerr;
@ -1487,7 +1457,7 @@ ifx_ssc_init (void)
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", __FUNCTION__,
printk ("%s: unable to get irq %d\n", __func__,
info->errirq);
local_irq_restore (flags);
goto irqerr;
@ -1506,7 +1476,7 @@ ifx_ssc_init (void)
info = &isp[i];
if (ifx_ssc_hwinit (info) < 0) {
printk ("%s: hardware init failed for port %d\n",
__FUNCTION__, i);
__func__, i);
goto irqerr;
}
}
@ -1550,71 +1520,34 @@ ifx_ssc_cleanup_module (void)
remove_proc_entry ("driver/ssc2", NULL);
}
module_exit (ifx_ssc_cleanup_module);
module_init(ifx_ssc_init);
module_exit(ifx_ssc_cleanup_module);
/* Module entry-points */
module_init (ifx_ssc_init);
#ifndef MODULE
static int __init
ifx_ssc_set_maj (char *str)
{
maj = simple_strtol (str, NULL, 0);
return 1;
}
__setup ("ssc_maj=", ifx_ssc_set_maj);
#endif /* !MODULE */
#define DANUBE_SSC_EMSG(fmt,arg...) printk("%s: "fmt,__FUNCTION__, ##arg)
/* Brief: chip select enable
*/
inline int
ifx_ssc_cs_low (u32 pin)
{
int ret = 0;
if ((ret =
ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_GPO_OUT_CLR,
(unsigned long) &pin))) {
DANUBE_SSC_EMSG ("clear CS %d fails\n", pin);
}
if ((ret = ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_GPO_OUT_CLR, (unsigned long) &pin)))
printk ("clear CS %d fails\n", pin);
wmb ();
return ret;
}
EXPORT_SYMBOL(ifx_ssc_cs_low);
EXPORT_SYMBOL (ifx_ssc_cs_low);
/* Brief: chip select disable
*/
inline int
ifx_ssc_cs_high (u32 pin)
{
int ret = 0;
if ((ret =
ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_GPO_OUT_SET,
(unsigned long) &pin))) {
DANUBE_SSC_EMSG ("set CS %d fails\n", pin);
}
if ((ret = ifx_ssc_ioctl((struct inode *) 0, NULL, IFX_SSC_GPO_OUT_SET, (unsigned long) &pin)))
printk ("set CS %d fails\n", pin);
wmb ();
return ret;
}
EXPORT_SYMBOL(ifx_ssc_cs_high);
EXPORT_SYMBOL (ifx_ssc_cs_high);
/* Brief: one SSC session
* Parameter:
* tx_buf
* tx_len
* rx_buf
* rx_len
* session_mode: IFX_SSC_MODE_RXTX or IFX_SSC_MODE_TX
* Return: >=0 number of bytes received (if rx_buf != 0) or transmitted
* <0 error code
* Description:
* 0. copy data to internal buffer
* 1. Write command
* 2a. If SSC_SESSION_MODE_TXONLY, read tx_len data
* 2b. If not Read back (tx_len + rx_len) data
* 3. copy internal buffer to rx buf if necessary
*/
static int
ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
{
@ -1622,15 +1555,11 @@ ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
char *ssc_tx_buf = NULL;
char *ssc_rx_buf = NULL;
// volatile char ssc_tx_buf[128]={0};
// volatile char ssc_rx_buf[128]={0};
int eff_size = 0;
u8 mode = 0;
if (tx_buf == NULL && tx_len == 0 && rx_buf == NULL && rx_len == 0) {
DANUBE_SSC_EMSG ("invalid parameters\n");
printk ("invalid parameters\n");
ret = -EINVAL;
goto ssc_session_exit;
}
@ -1639,7 +1568,7 @@ ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
mode = IFX_SSC_MODE_RX;
}
else {
DANUBE_SSC_EMSG ("invalid parameters\n");
printk ("invalid parameters\n");
ret = -EINVAL;
goto ssc_session_exit;
}
@ -1649,7 +1578,7 @@ ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
mode = IFX_SSC_MODE_TX;
}
else {
DANUBE_SSC_EMSG ("invalid parameters\n");
printk ("invalid parameters\n");
ret = -EINVAL;
goto ssc_session_exit;
}
@ -1692,7 +1621,7 @@ ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
GFP_KERNEL);
}
if (ssc_tx_buf == NULL || ssc_rx_buf == NULL) {
DANUBE_SSC_EMSG ("no memory for size of %d\n", eff_size);
printk ("no memory for size of %d\n", eff_size);
ret = -ENOMEM;
goto ssc_session_exit;
}
@ -1710,12 +1639,12 @@ ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
}
if (ret != eff_size) {
DANUBE_SSC_EMSG ("ifx_ssc_write return %d\n", ret);
printk ("ifx_ssc_write return %d\n", ret);
goto ssc_session_exit;
}
ret = ifx_ssc_kread (0, ssc_rx_buf, eff_size);
if (ret != eff_size) {
DANUBE_SSC_EMSG ("ifx_ssc_read return %d\n", ret);
printk ("ifx_ssc_read return %d\n", ret);
goto ssc_session_exit;
}
@ -1740,53 +1669,26 @@ ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
return ret;
}
/* Brief: TX-RX session
* Parameter:
* tx_buf
* tx_len
* rx_buf
* rx_len
* Return: >=0 number of bytes received
* <0 error code
* Description:
* 1. TX session
* 2. RX session
*/
int
ifx_ssc_txrx (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
{
return ssc_session (tx_buf, tx_len, rx_buf, rx_len);
return ssc_session(tx_buf, tx_len, rx_buf, rx_len);
}
EXPORT_SYMBOL(ifx_ssc_txrx);
EXPORT_SYMBOL (ifx_ssc_txrx);
/* Brief: TX only session
* Parameter:
* tx_buf
* tx_len
* Return: >=0 number of bytes transmitted
* <0 error code
*/
int
ifx_ssc_tx (char *tx_buf, u32 tx_len)
{
return ssc_session (tx_buf, tx_len, NULL, 0);
return ssc_session(tx_buf, tx_len, NULL, 0);
}
EXPORT_SYMBOL(ifx_ssc_tx);
EXPORT_SYMBOL (ifx_ssc_tx);
/* Brief: RX only session
* Parameter:
* rx_buf
* rx_len
* Return: >=0 number of bytes received
* <0 error code
*/
int
ifx_ssc_rx (char *rx_buf, u32 rx_len)
{
return ssc_session (NULL, 0, rx_buf, rx_len);
return ssc_session(NULL, 0, rx_buf, rx_len);
}
EXPORT_SYMBOL (ifx_ssc_rx);
EXPORT_SYMBOL(ifx_ssc_rx);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");