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Code

cleanup of register access

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9843 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
blogic 2007-12-22 20:22:43 +00:00
parent 8eae2749b6
commit 6fe1883dc8
1 changed files with 25 additions and 37 deletions
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62
target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c
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@ -108,7 +108,7 @@ ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info)
{
unsigned int rmc;
rmc = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CLC) & IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET;
rmc = (readl(IFXMIPS_SSC_CLC) & IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET;
if (rmc == 0)
{
printk ("ifx_ssc_get_kernel_clk rmc==0 \n");
@ -168,24 +168,12 @@ 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;
// 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
// in software which helps:
// In tx or rx/tx mode all transfers from the buffer to the FIFO are
// 32-bit wide, except for the last three bytes, which could be a
// combination of 16- and 8-bit access.
// => The whole block is received as 32-bit words as a contigous stream,
// even if there was a gap in tx which has the fifo run out of data!
// Just the last fifo entry *may* be partially filled (0, 1, 2 or 3 bytes)!
/* free space in the RX buffer */
fifo_fill_lev = (readl(IFXMIPS_SSC_FSTAT) & IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >> IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET;
bytes_in_buf = info->rxbuf_end - info->rxbuf_ptr;
// 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 = readl(IFXMIPS_SSC_RB);
info->rxbuf_ptr += 4;
info->stats.rxBytes += 4;
fifo_fill_lev--;
@ -194,14 +182,14 @@ rx_int (struct ifx_ssc_port *info)
// 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 = (readl(IFXMIPS_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)
rx_valid_cnt = bytes_in_buf;
tmp_val = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
tmp_val = readl(IFXMIPS_SSC_RB);
for (i = 0; i < rx_valid_cnt; i++)
{
@ -220,9 +208,9 @@ rx_int (struct ifx_ssc_port *info)
} 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);
writel((info->rxbuf_end - info->rxbuf_ptr) << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ);
else
WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
writel(IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, IFXMIPS_SSC_RXREQ);
}
}
@ -231,8 +219,8 @@ 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 = ((readl(IFXMIPS_SSC_ID) & IFX_SSC_PERID_TXFS_MASK) >> IFX_SSC_PERID_TXFS_OFFSET)
- ((readl(IFXMIPS_SSC_FSTAT) & IFX_SSC_FSTAT_TRANSMIT_WORDS_MASK) >> IFX_SSC_FSTAT_TRANSMIT_WORDS_OFFSET);
if (fifo_space == 0)
return;
@ -245,7 +233,7 @@ tx_int (struct ifx_ssc_port *info)
for (i = 0; i < fill / 4; i++)
{
// at first 32 bit access
WRITE_PERIPHERAL_REGISTER (*(UINT32 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
writel(*(UINT32 *) info->txbuf_ptr, IFXMIPS_SSC_TB);
info->txbuf_ptr += 4;
}
@ -307,7 +295,7 @@ ifx_ssc_err_int (int irq, void *dev_id)
unsigned long flags;
local_irq_save (flags);
state = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE);
state = readl(IFXMIPS_SSC_STATE);
if ((state & IFX_SSC_STATE_RX_UFL) != 0) {
info->stats.rxUnErr++;
@ -335,7 +323,7 @@ ifx_ssc_err_int (int irq, void *dev_id)
}
if (write_back)
WRITE_PERIPHERAL_REGISTER (write_back, info->mapbase + IFX_SSC_WHBSTATE);
writel(write_back, IFXMIPS_SSC_WHBSTATE);
local_irq_restore (flags);
@ -361,12 +349,12 @@ 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 = (readl(IFXMIPS_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED) != 0;
writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_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);
writel(IFX_SSC_XFCON_FIFO_FLUSH, IFXMIPS_SSC_TXFCON);
writel(IFX_SSC_XFCON_FIFO_FLUSH, IFXMIPS_SSC_RXFCON);
// free txbuf
if (info->txbuf != NULL)
@ -385,10 +373,10 @@ ifx_ssc_abort (struct ifx_ssc_port *info)
mask_and_ack_ifxmips_irq(info->errirq);
// clear error flags
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, info->mapbase + IFX_SSC_WHBSTATE);
writel(IFX_SSC_WHBSTATE_CLR_ALL_ERROR, IFXMIPS_SSC_WHBSTATE);
if (enabled)
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
writel(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE);
}
@ -427,22 +415,22 @@ 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);
writel((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_SSC_TXFCON);
writel((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, IFXMIPS_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);
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);
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
writel(IFX_SSC_WHBSTATE_SET_ENABLE, IFXMIPS_SSC_WHBSTATE);
return 0;
}
@ -466,7 +454,7 @@ ifx_ssc_close (struct inode *inode, struct file *filp)
if (!info)
return -ENXIO;
WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
writel(IFX_SSC_WHBSTATE_CLR_ENABLE, IFXMIPS_SSC_WHBSTATE);
ifx_ssc_abort(info);
@ -727,7 +715,7 @@ ifx_ssc_frm_status_get (struct ifx_ssc_port *info)
{
unsigned long tmp;
tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFSTAT);
tmp = readl(IFXMIPS_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;
@ -1246,7 +1234,7 @@ ifx_ssc_init (void)
info->txbuf = NULL;
/* values specific to SSC1 */
if (i == 0) {
info->mapbase = IFXMIPS_SSC1_BASE_ADDR;
info->mapbase = IFXMIPS_SSC_BASE_ADDR;
info->txirq = IFXMIPS_SSC_TIR;
info->rxirq = IFXMIPS_SSC_RIR;
info->errirq = IFXMIPS_SSC_EIR;