diff options
| -rw-r--r-- | arch/blackfin/include/asm/bfin5xx_spi.h | 68 | ||||
| -rw-r--r-- | drivers/spi/spi_bfin5xx.c | 40 |
2 files changed, 18 insertions, 90 deletions
diff --git a/arch/blackfin/include/asm/bfin5xx_spi.h b/arch/blackfin/include/asm/bfin5xx_spi.h index 6f011da..4223cf0 100644 --- a/arch/blackfin/include/asm/bfin5xx_spi.h +++ b/arch/blackfin/include/asm/bfin5xx_spi.h @@ -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 */ diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index 376f2f0..b3450b7 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -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) != |