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spi/bfin_spi: combine duplicate SPI_CTL read/write logic 

While combining things, also switch to the proper SPI bit define names.
This lets us punt the rarely used SPI defines.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2009-12-18 18:00:10 +00:00
parent 5b47bcd48b
commit 5e8592dca3
2 changed files with 18 additions and 90 deletions
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68
arch/blackfin/include/asm/bfin5xx_spi.h
View File

@ -11,18 +11,6 @@
#define MIN_SPI_BAUD_VAL 2
#define SPI_READ 0
#define SPI_WRITE 1
#define SPI_CTRL_OFF 0x0
#define SPI_FLAG_OFF 0x4
#define SPI_STAT_OFF 0x8
#define SPI_TXBUFF_OFF 0xc
#define SPI_RXBUFF_OFF 0x10
#define SPI_BAUD_OFF 0x14
#define SPI_SHAW_OFF 0x18
#define BIT_CTL_ENABLE 0x4000
#define BIT_CTL_OPENDRAIN 0x2000
#define BIT_CTL_MASTER 0x1000
@ -53,62 +41,6 @@
#define BIT_STU_SENDOVER 0x0001
#define BIT_STU_RECVFULL 0x0020
#define CFG_SPI_ENABLE 1
#define CFG_SPI_DISABLE 0
#define CFG_SPI_OUTENABLE 1
#define CFG_SPI_OUTDISABLE 0
#define CFG_SPI_ACTLOW 1
#define CFG_SPI_ACTHIGH 0
#define CFG_SPI_PHASESTART 1
#define CFG_SPI_PHASEMID 0
#define CFG_SPI_MASTER 1
#define CFG_SPI_SLAVE 0
#define CFG_SPI_SENELAST 0
#define CFG_SPI_SENDZERO 1
#define CFG_SPI_RCVFLUSH 1
#define CFG_SPI_RCVDISCARD 0
#define CFG_SPI_LSBFIRST 1
#define CFG_SPI_MSBFIRST 0
#define CFG_SPI_WORDSIZE16 1
#define CFG_SPI_WORDSIZE8 0
#define CFG_SPI_MISOENABLE 1
#define CFG_SPI_MISODISABLE 0
#define CFG_SPI_READ 0x00
#define CFG_SPI_WRITE 0x01
#define CFG_SPI_DMAREAD 0x02
#define CFG_SPI_DMAWRITE 0x03
#define CFG_SPI_CSCLEARALL 0
#define CFG_SPI_CHIPSEL1 1
#define CFG_SPI_CHIPSEL2 2
#define CFG_SPI_CHIPSEL3 3
#define CFG_SPI_CHIPSEL4 4
#define CFG_SPI_CHIPSEL5 5
#define CFG_SPI_CHIPSEL6 6
#define CFG_SPI_CHIPSEL7 7
#define CFG_SPI_CS1VALUE 1
#define CFG_SPI_CS2VALUE 2
#define CFG_SPI_CS3VALUE 3
#define CFG_SPI_CS4VALUE 4
#define CFG_SPI_CS5VALUE 5
#define CFG_SPI_CS6VALUE 6
#define CFG_SPI_CS7VALUE 7
#define CMD_SPI_SET_BAUDRATE 2
#define CMD_SPI_GET_SYSTEMCLOCK 25
#define CMD_SPI_SET_WRITECONTINUOUS 26
#define MAX_CTRL_CS 8 /* cs in spi controller */
/* device.platform_data for SSP controller devices */

40
drivers/spi/spi_bfin5xx.c
View File

@ -560,8 +560,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
struct spi_transfer *previous = NULL;
struct slave_data *chip = NULL;
unsigned int bits_per_word;
u8 width;
u16 cr, dma_width, dma_config;
u16 cr, cr_width, dma_width, dma_config;
u32 tranf_success = 1;
u8 full_duplex = 0;
@ -642,22 +641,19 @@ static void bfin_spi_pump_transfers(unsigned long data)
bits_per_word = transfer->bits_per_word ? : message->spi->bits_per_word;
if (bits_per_word == 8) {
drv_data->n_bytes = 1;
width = CFG_SPI_WORDSIZE8;
drv_data->len = transfer->len;
cr_width = 0;
drv_data->ops = &bfin_transfer_ops_u8;
} else {
drv_data->n_bytes = 2;
width = CFG_SPI_WORDSIZE16;
drv_data->len = (transfer->len) >> 1;
cr_width = BIT_CTL_WORDSIZE;
drv_data->ops = &bfin_transfer_ops_u16;
}
cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
cr |= (width << 8);
cr = read_CTRL(drv_data) & ~(BIT_CTL_TIMOD | BIT_CTL_WORDSIZE);
cr |= cr_width;
write_CTRL(drv_data, cr);
if (width == CFG_SPI_WORDSIZE16) {
drv_data->len = (transfer->len) >> 1;
} else {
drv_data->len = transfer->len;
}
dev_dbg(&drv_data->pdev->dev,
"transfer: drv_data->ops is %p, chip->ops is %p, u8_ops is %p\n",
drv_data->ops, chip->ops, &bfin_transfer_ops_u8);
@ -672,13 +668,12 @@ static void bfin_spi_pump_transfers(unsigned long data)
write_BAUD(drv_data, chip->baud);
write_STAT(drv_data, BIT_STAT_CLR);
cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
if (drv_data->cs_change)
bfin_spi_cs_active(drv_data, chip);
dev_dbg(&drv_data->pdev->dev,
"now pumping a transfer: width is %d, len is %d\n",
width, transfer->len);
cr_width, transfer->len);
/*
* Try to map dma buffer and do a dma transfer. If successful use,
@ -697,7 +692,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
/* config dma channel */
dev_dbg(&drv_data->pdev->dev, "doing dma transfer\n");
set_dma_x_count(drv_data->dma_channel, drv_data->len);
if (width == CFG_SPI_WORDSIZE16) {
if (cr_width == BIT_CTL_WORDSIZE) {
set_dma_x_modify(drv_data->dma_channel, 2);
dma_width = WDSIZE_16;
} else {
@ -786,10 +781,16 @@ static void bfin_spi_pump_transfers(unsigned long data)
return;
}
/*
* We always use SPI_WRITE mode (transfer starts with TDBR write).
* SPI_READ mode (transfer starts with RDBR read) seems to have
* problems with setting up the output value in TDBR prior to the
* start of the transfer.
*/
write_CTRL(drv_data, cr | BIT_CTL_TXMOD);
if (chip->pio_interrupt) {
/* use write mode. spi irq should have been disabled */
cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
write_CTRL(drv_data, (cr | CFG_SPI_WRITE));
/* SPI irq should have been disabled by now */
/* discard old RX data and clear RXS */
bfin_spi_dummy_read(drv_data);
@ -813,11 +814,6 @@ static void bfin_spi_pump_transfers(unsigned long data)
/* IO mode */
dev_dbg(&drv_data->pdev->dev, "doing IO transfer\n");
/* we always use SPI_WRITE mode. SPI_READ mode
seems to have problems with setting up the
output value in TDBR prior to the transfer. */
write_CTRL(drv_data, (cr | CFG_SPI_WRITE));
if (full_duplex) {
/* full duplex mode */
BUG_ON((drv_data->tx_end - drv_data->tx) !=