diff options
Diffstat (limited to 'drivers/spi/spi_bfin5xx.c')
| -rw-r--r-- | drivers/spi/spi_bfin5xx.c | 371 |
1 files changed, 189 insertions, 182 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index c7cfd95fa8e..c4c4905e0aa 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -61,31 +61,14 @@ MODULE_AUTHOR(DRV_AUTHOR); MODULE_DESCRIPTION(DRV_DESC); MODULE_LICENSE("GPL"); -#define IS_DMA_ALIGNED(x) (((u32)(x)&0x07)==0) +#define IS_DMA_ALIGNED(x) (((u32)(x)&0x07) == 0) -static u32 spi_dma_ch; -static u32 spi_regs_base; - -#define DEFINE_SPI_REG(reg, off) \ -static inline u16 read_##reg(void) \ - { return bfin_read16(spi_regs_base + off); } \ -static inline void write_##reg(u16 v) \ - {bfin_write16(spi_regs_base + off, v); } - -DEFINE_SPI_REG(CTRL, 0x00) -DEFINE_SPI_REG(FLAG, 0x04) -DEFINE_SPI_REG(STAT, 0x08) -DEFINE_SPI_REG(TDBR, 0x0C) -DEFINE_SPI_REG(RDBR, 0x10) -DEFINE_SPI_REG(BAUD, 0x14) -DEFINE_SPI_REG(SHAW, 0x18) -#define START_STATE ((void*)0) -#define RUNNING_STATE ((void*)1) -#define DONE_STATE ((void*)2) -#define ERROR_STATE ((void*)-1) -#define QUEUE_RUNNING 0 -#define QUEUE_STOPPED 1 -int dma_requested; +#define START_STATE ((void *)0) +#define RUNNING_STATE ((void *)1) +#define DONE_STATE ((void *)2) +#define ERROR_STATE ((void *)-1) +#define QUEUE_RUNNING 0 +#define QUEUE_STOPPED 1 struct driver_data { /* Driver model hookup */ @@ -94,6 +77,9 @@ struct driver_data { /* SPI framework hookup */ struct spi_master *master; + /* Regs base of SPI controller */ + u32 regs_base; + /* BFIN hookup */ struct bfin5xx_spi_master *master_info; @@ -118,9 +104,14 @@ struct driver_data { void *tx_end; void *rx; void *rx_end; + + /* DMA stuffs */ + int dma_channel; int dma_mapped; + int dma_requested; dma_addr_t rx_dma; dma_addr_t tx_dma; + size_t rx_map_len; size_t tx_map_len; u8 n_bytes; @@ -147,20 +138,34 @@ struct chip_data { void (*duplex) (struct driver_data *); }; +#define DEFINE_SPI_REG(reg, off) \ +static inline u16 read_##reg(struct driver_data *drv_data) \ + { return bfin_read16(drv_data->regs_base + off); } \ +static inline void write_##reg(struct driver_data *drv_data, u16 v) \ + { bfin_write16(drv_data->regs_base + off, v); } + +DEFINE_SPI_REG(CTRL, 0x00) +DEFINE_SPI_REG(FLAG, 0x04) +DEFINE_SPI_REG(STAT, 0x08) +DEFINE_SPI_REG(TDBR, 0x0C) +DEFINE_SPI_REG(RDBR, 0x10) +DEFINE_SPI_REG(BAUD, 0x14) +DEFINE_SPI_REG(SHAW, 0x18) + static void bfin_spi_enable(struct driver_data *drv_data) { u16 cr; - cr = read_CTRL(); - write_CTRL(cr | BIT_CTL_ENABLE); + cr = read_CTRL(drv_data); + write_CTRL(drv_data, (cr | BIT_CTL_ENABLE)); } static void bfin_spi_disable(struct driver_data *drv_data) { u16 cr; - cr = read_CTRL(); - write_CTRL(cr & (~BIT_CTL_ENABLE)); + cr = read_CTRL(drv_data); + write_CTRL(drv_data, (cr & (~BIT_CTL_ENABLE))); } /* Caculate the SPI_BAUD register value based on input HZ */ @@ -180,32 +185,32 @@ static int flush(struct driver_data *drv_data) unsigned long limit = loops_per_jiffy << 1; /* wait for stop and clear stat */ - while (!(read_STAT() & BIT_STAT_SPIF) && limit--) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF) && limit--) continue; - write_STAT(BIT_STAT_CLR); + write_STAT(drv_data, BIT_STAT_CLR); return limit; } /* Chip select operation functions for cs_change flag */ -static void cs_active(struct chip_data *chip) +static void cs_active(struct driver_data *drv_data, struct chip_data *chip) { - u16 flag = read_FLAG(); + u16 flag = read_FLAG(drv_data); flag |= chip->flag; flag &= ~(chip->flag << 8); - write_FLAG(flag); + write_FLAG(drv_data, flag); } -static void cs_deactive(struct chip_data *chip) +static void cs_deactive(struct driver_data *drv_data, struct chip_data *chip) { - u16 flag = read_FLAG(); + u16 flag = read_FLAG(drv_data); flag |= (chip->flag << 8); - write_FLAG(flag); + write_FLAG(drv_data, flag); } #define MAX_SPI_SSEL 7 @@ -217,16 +222,16 @@ static int restore_state(struct driver_data *drv_data) int ret = 0; /* Clear status and disable clock */ - write_STAT(BIT_STAT_CLR); + write_STAT(drv_data, BIT_STAT_CLR); bfin_spi_disable(drv_data); dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n"); /* Load the registers */ - cs_deactive(chip); - write_BAUD(chip->baud); + cs_deactive(drv_data, chip); + write_BAUD(drv_data, chip->baud); chip->ctl_reg &= (~BIT_CTL_TIMOD); chip->ctl_reg |= (chip->width << 8); - write_CTRL(chip->ctl_reg); + write_CTRL(drv_data, chip->ctl_reg); bfin_spi_enable(drv_data); @@ -239,10 +244,10 @@ static int restore_state(struct driver_data *drv_data) } /* used to kick off transfer in rx mode */ -static unsigned short dummy_read(void) +static unsigned short dummy_read(struct driver_data *drv_data) { unsigned short tmp; - tmp = read_RDBR(); + tmp = read_RDBR(drv_data); return tmp; } @@ -251,8 +256,8 @@ static void null_writer(struct driver_data *drv_data) u8 n_bytes = drv_data->n_bytes; while (drv_data->tx < drv_data->tx_end) { - write_TDBR(0); - while ((read_STAT() & BIT_STAT_TXS)) + write_TDBR(drv_data, 0); + while ((read_STAT(drv_data) & BIT_STAT_TXS)) continue; drv_data->tx += n_bytes; } @@ -261,12 +266,12 @@ static void null_writer(struct driver_data *drv_data) static void null_reader(struct driver_data *drv_data) { u8 n_bytes = drv_data->n_bytes; - dummy_read(); + dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end) { - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - dummy_read(); + dummy_read(drv_data); drv_data->rx += n_bytes; } } @@ -274,15 +279,15 @@ static void null_reader(struct driver_data *drv_data) static void u8_writer(struct driver_data *drv_data) { dev_dbg(&drv_data->pdev->dev, - "cr8-s is 0x%x\n", read_STAT()); + "cr8-s is 0x%x\n", read_STAT(drv_data)); /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; while (drv_data->tx < drv_data->tx_end) { - write_TDBR(*(u8 *) (drv_data->tx)); - while (read_STAT() & BIT_STAT_TXS) + write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); + while (read_STAT(drv_data) & BIT_STAT_TXS) continue; ++drv_data->tx; } @@ -293,16 +298,16 @@ static void u8_cs_chg_writer(struct driver_data *drv_data) struct chip_data *chip = drv_data->cur_chip; /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; while (drv_data->tx < drv_data->tx_end) { - cs_active(chip); + cs_active(drv_data, chip); - write_TDBR(*(u8 *) (drv_data->tx)); - while (read_STAT() & BIT_STAT_TXS) + write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); + while (read_STAT(drv_data) & BIT_STAT_TXS) continue; - cs_deactive(chip); + cs_deactive(drv_data, chip); if (chip->cs_chg_udelay) udelay(chip->cs_chg_udelay); @@ -313,27 +318,27 @@ static void u8_cs_chg_writer(struct driver_data *drv_data) static void u8_reader(struct driver_data *drv_data) { dev_dbg(&drv_data->pdev->dev, - "cr-8 is 0x%x\n", read_STAT()); + "cr-8 is 0x%x\n", read_STAT(drv_data)); /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; /* clear TDBR buffer before read(else it will be shifted out) */ - write_TDBR(0xFFFF); + write_TDBR(drv_data, 0xFFFF); - dummy_read(); + dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end - 1) { - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u8 *) (drv_data->rx) = read_RDBR(); + *(u8 *) (drv_data->rx) = read_RDBR(drv_data); ++drv_data->rx; } - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u8 *) (drv_data->rx) = read_SHAW(); + *(u8 *) (drv_data->rx) = read_SHAW(drv_data); ++drv_data->rx; } @@ -342,49 +347,49 @@ static void u8_cs_chg_reader(struct driver_data *drv_data) struct chip_data *chip = drv_data->cur_chip; /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; /* clear TDBR buffer before read(else it will be shifted out) */ - write_TDBR(0xFFFF); + write_TDBR(drv_data, 0xFFFF); - cs_active(chip); - dummy_read(); + cs_active(drv_data, chip); + dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end - 1) { - cs_deactive(chip); + cs_deactive(drv_data, chip); if (chip->cs_chg_udelay) udelay(chip->cs_chg_udelay); - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - cs_active(chip); - *(u8 *) (drv_data->rx) = read_RDBR(); + cs_active(drv_data, chip); + *(u8 *) (drv_data->rx) = read_RDBR(drv_data); ++drv_data->rx; } - cs_deactive(chip); + cs_deactive(drv_data, chip); - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u8 *) (drv_data->rx) = read_SHAW(); + *(u8 *) (drv_data->rx) = read_SHAW(drv_data); ++drv_data->rx; } static void u8_duplex(struct driver_data *drv_data) { /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; /* in duplex mode, clk is triggered by writing of TDBR */ while (drv_data->rx < drv_data->rx_end) { - write_TDBR(*(u8 *) (drv_data->tx)); - while (read_STAT() & BIT_STAT_TXS) + write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); + while (read_STAT(drv_data) & BIT_STAT_TXS) continue; - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u8 *) (drv_data->rx) = read_RDBR(); + *(u8 *) (drv_data->rx) = read_RDBR(drv_data); ++drv_data->rx; ++drv_data->tx; } @@ -395,19 +400,19 @@ static void u8_cs_chg_duplex(struct driver_data *drv_data) struct chip_data *chip = drv_data->cur_chip; /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; while (drv_data->rx < drv_data->rx_end) { - cs_active(chip); + cs_active(drv_data, chip); - write_TDBR(*(u8 *) (drv_data->tx)); - while (read_STAT() & BIT_STAT_TXS) + write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); + while (read_STAT(drv_data) & BIT_STAT_TXS) continue; - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u8 *) (drv_data->rx) = read_RDBR(); - cs_deactive(chip); + *(u8 *) (drv_data->rx) = read_RDBR(drv_data); + cs_deactive(drv_data, chip); if (chip->cs_chg_udelay) udelay(chip->cs_chg_udelay); @@ -419,15 +424,15 @@ static void u8_cs_chg_duplex(struct driver_data *drv_data) static void u16_writer(struct driver_data *drv_data) { dev_dbg(&drv_data->pdev->dev, - "cr16 is 0x%x\n", read_STAT()); + "cr16 is 0x%x\n", read_STAT(drv_data)); /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; while (drv_data->tx < drv_data->tx_end) { - write_TDBR(*(u16 *) (drv_data->tx)); - while ((read_STAT() & BIT_STAT_TXS)) + write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); + while ((read_STAT(drv_data) & BIT_STAT_TXS)) continue; drv_data->tx += 2; } @@ -438,16 +443,16 @@ static void u16_cs_chg_writer(struct driver_data *drv_data) struct chip_data *chip = drv_data->cur_chip; /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; while (drv_data->tx < drv_data->tx_end) { - cs_active(chip); + cs_active(drv_data, chip); - write_TDBR(*(u16 *) (drv_data->tx)); - while ((read_STAT() & BIT_STAT_TXS)) + write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); + while ((read_STAT(drv_data) & BIT_STAT_TXS)) continue; - cs_deactive(chip); + cs_deactive(drv_data, chip); if (chip->cs_chg_udelay) udelay(chip->cs_chg_udelay); @@ -458,27 +463,27 @@ static void u16_cs_chg_writer(struct driver_data *drv_data) static void u16_reader(struct driver_data *drv_data) { dev_dbg(&drv_data->pdev->dev, - "cr-16 is 0x%x\n", read_STAT()); + "cr-16 is 0x%x\n", read_STAT(drv_data)); /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; /* clear TDBR buffer before read(else it will be shifted out) */ - write_TDBR(0xFFFF); + write_TDBR(drv_data, 0xFFFF); - dummy_read(); + dummy_read(drv_data); while (drv_data->rx < (drv_data->rx_end - 2)) { - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u16 *) (drv_data->rx) = read_RDBR(); + *(u16 *) (drv_data->rx) = read_RDBR(drv_data); drv_data->rx += 2; } - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u16 *) (drv_data->rx) = read_SHAW(); + *(u16 *) (drv_data->rx) = read_SHAW(drv_data); drv_data->rx += 2; } @@ -487,49 +492,49 @@ static void u16_cs_chg_reader(struct driver_data *drv_data) struct chip_data *chip = drv_data->cur_chip; /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; /* clear TDBR buffer before read(else it will be shifted out) */ - write_TDBR(0xFFFF); + write_TDBR(drv_data, 0xFFFF); - cs_active(chip); - dummy_read(); + cs_active(drv_data, chip); + dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end) { - cs_deactive(chip); + cs_deactive(drv_data, chip); if (chip->cs_chg_udelay) udelay(chip->cs_chg_udelay); - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - cs_active(chip); - *(u16 *) (drv_data->rx) = read_RDBR(); + cs_active(drv_data, chip); + *(u16 *) (drv_data->rx) = read_RDBR(drv_data); drv_data->rx += 2; } - cs_deactive(chip); + cs_deactive(drv_data, chip); - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u16 *) (drv_data->rx) = read_SHAW(); + *(u16 *) (drv_data->rx) = read_SHAW(drv_data); drv_data->rx += 2; } static void u16_duplex(struct driver_data *drv_data) { /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; /* in duplex mode, clk is triggered by writing of TDBR */ while (drv_data->tx < drv_data->tx_end) { - write_TDBR(*(u16 *) (drv_data->tx)); - while (read_STAT() & BIT_STAT_TXS) + write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); + while (read_STAT(drv_data) & BIT_STAT_TXS) continue; - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u16 *) (drv_data->rx) = read_RDBR(); + *(u16 *) (drv_data->rx) = read_RDBR(drv_data); drv_data->rx += 2; drv_data->tx += 2; } @@ -540,19 +545,19 @@ static void u16_cs_chg_duplex(struct driver_data *drv_data) struct chip_data *chip = drv_data->cur_chip; /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; while (drv_data->tx < drv_data->tx_end) { - cs_active(chip); + cs_active(drv_data, chip); - write_TDBR(*(u16 *) (drv_data->tx)); - while (read_STAT() & BIT_STAT_TXS) + write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); + while (read_STAT(drv_data) & BIT_STAT_TXS) continue; - while (!(read_STAT() & BIT_STAT_RXS)) + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) continue; - *(u16 *) (drv_data->rx) = read_RDBR(); - cs_deactive(chip); + *(u16 *) (drv_data->rx) = read_RDBR(drv_data); + cs_deactive(drv_data, chip); if (chip->cs_chg_udelay) udelay(chip->cs_chg_udelay); @@ -603,12 +608,12 @@ static void giveback(struct driver_data *drv_data) /* disable chip select signal. And not stop spi in autobuffer mode */ if (drv_data->tx_dma != 0xFFFF) { - cs_deactive(chip); + cs_deactive(drv_data, chip); bfin_spi_disable(drv_data); } if (!drv_data->cs_change) - cs_deactive(chip); + cs_deactive(drv_data, chip); if (msg->complete) msg->complete(msg->context); @@ -617,14 +622,14 @@ static void giveback(struct driver_data *drv_data) static irqreturn_t dma_irq_handler(int irq, void *dev_id) { struct driver_data *drv_data = (struct driver_data *)dev_id; - struct spi_message *msg = drv_data->cur_msg; struct chip_data *chip = drv_data->cur_chip; + struct spi_message *msg = drv_data->cur_msg; dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler\n"); - clear_dma_irqstat(spi_dma_ch); + clear_dma_irqstat(drv_data->dma_channel); /* Wait for DMA to complete */ - while (get_dma_curr_irqstat(spi_dma_ch) & DMA_RUN) + while (get_dma_curr_irqstat(drv_data->dma_channel) & DMA_RUN) continue; /* @@ -634,18 +639,18 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) * register until it goes low for 2 successive reads */ if (drv_data->tx != NULL) { - while ((read_STAT() & TXS) || - (read_STAT() & TXS)) + while ((read_STAT(drv_data) & TXS) || + (read_STAT(drv_data) & TXS)) continue; } - while (!(read_STAT() & SPIF)) + while (!(read_STAT(drv_data) & SPIF)) continue; msg->actual_length += drv_data->len_in_bytes; if (drv_data->cs_change) - cs_deactive(chip); + cs_deactive(drv_data, chip); /* Move to next transfer */ msg->state = next_transfer(drv_data); @@ -656,8 +661,8 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) /* free the irq handler before next transfer */ dev_dbg(&drv_data->pdev->dev, "disable dma channel irq%d\n", - spi_dma_ch); - dma_disable_irq(spi_dma_ch); + drv_data->dma_channel); + dma_disable_irq(drv_data->dma_channel); return IRQ_HANDLED; } @@ -751,9 +756,9 @@ static void pump_transfers(unsigned long data) message->state = RUNNING_STATE; dma_config = 0; - write_STAT(BIT_STAT_CLR); - cr = (read_CTRL() & (~BIT_CTL_TIMOD)); - cs_active(chip); + write_STAT(drv_data, BIT_STAT_CLR); + cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD)); + cs_active(drv_data, chip); dev_dbg(&drv_data->pdev->dev, "now pumping a transfer: width is %d, len is %d\n", @@ -766,23 +771,23 @@ static void pump_transfers(unsigned long data) */ if (drv_data->cur_chip->enable_dma && drv_data->len > 6) { - disable_dma(spi_dma_ch); - clear_dma_irqstat(spi_dma_ch); + disable_dma(drv_data->dma_channel); + clear_dma_irqstat(drv_data->dma_channel); /* config dma channel */ dev_dbg(&drv_data->pdev->dev, "doing dma transfer\n"); if (width == CFG_SPI_WORDSIZE16) { - set_dma_x_count(spi_dma_ch, drv_data->len); - set_dma_x_modify(spi_dma_ch, 2); + set_dma_x_count(drv_data->dma_channel, drv_data->len); + set_dma_x_modify(drv_data->dma_channel, 2); dma_width = WDSIZE_16; } else { - set_dma_x_count(spi_dma_ch, drv_data->len); - set_dma_x_modify(spi_dma_ch, 1); + set_dma_x_count(drv_data->dma_channel, drv_data->len); + set_dma_x_modify(drv_data->dma_channel, 1); dma_width = WDSIZE_8; } /* poll for SPI completion before start */ - while (!(read_STAT() & BIT_STAT_SPIF)) + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) continue; /* dirty hack for autobuffer DMA mode */ @@ -791,15 +796,15 @@ static void pump_transfers(unsigned long data) "doing autobuffer DMA out.\n"); /* set SPI transfer mode */ - write_CTRL(cr | CFG_SPI_DMAWRITE); + write_CTRL(drv_data, (cr | CFG_SPI_DMAWRITE)); /* no irq in autobuffer mode */ dma_config = (DMAFLOW_AUTO | RESTART | dma_width | DI_EN); - set_dma_config(spi_dma_ch, dma_config); - set_dma_start_addr(spi_dma_ch, + set_dma_config(drv_data->dma_channel, dma_config); + set_dma_start_addr(drv_data->dma_channel, (unsigned long)drv_data->tx); - enable_dma(spi_dma_ch); + enable_dma(drv_data->dma_channel); /* just return here, there can only be one transfer in this mode */ message->status = 0; @@ -813,34 +818,34 @@ static void pump_transfers(unsigned long data) dev_dbg(&drv_data->pdev->dev, "doing DMA in.\n"); /* set SPI transfer mode */ - write_CTRL(cr | CFG_SPI_DMAREAD); + write_CTRL(drv_data, (cr | CFG_SPI_DMAREAD)); /* clear tx reg soformer data is not shifted out */ - write_TDBR(0xFFFF); + write_TDBR(drv_data, 0xFFFF); - set_dma_x_count(spi_dma_ch, drv_data->len); + set_dma_x_count(drv_data->dma_channel, drv_data->len); /* start dma */ - dma_enable_irq(spi_dma_ch); + dma_enable_irq(drv_data->dma_channel); dma_config = (WNR | RESTART | dma_width | DI_EN); - set_dma_config(spi_dma_ch, dma_config); - set_dma_start_addr(spi_dma_ch, + set_dma_config(drv_data->dma_channel, dma_config); + set_dma_start_addr(drv_data->dma_channel, (unsigned long)drv_data->rx); - enable_dma(spi_dma_ch); + enable_dma(drv_data->dma_channel); } else if (drv_data->tx != NULL) { dev_dbg(&drv_data->pdev->dev, "doing DMA out.\n"); /* set SPI transfer mode */ - write_CTRL(cr | CFG_SPI_DMAWRITE); + write_CTRL(drv_data, (cr | CFG_SPI_DMAWRITE)); /* start dma */ - dma_enable_irq(spi_dma_ch); + dma_enable_irq(drv_data->dma_channel); dma_config = (RESTART | dma_width | DI_EN); - set_dma_config(spi_dma_ch, dma_config); - set_dma_start_addr(spi_dma_ch, + set_dma_config(drv_data->dma_channel, dma_config); + set_dma_start_addr(drv_data->dma_channel, (unsigned long)drv_data->tx); - enable_dma(spi_dma_ch); + enable_dma(drv_data->dma_channel); } } else { /* IO mode write then read */ @@ -854,7 +859,7 @@ static void pump_transfers(unsigned long data) "IO duplex: cr is 0x%x\n", cr); /* set SPI transfer mode */ - write_CTRL(cr | CFG_SPI_WRITE); + write_CTRL(drv_data, (cr | CFG_SPI_WRITE)); drv_data->duplex(drv_data); @@ -866,7 +871,7 @@ static void pump_transfers(unsigned long data) "IO write: cr is 0x%x\n", cr); /* set SPI transfer mode */ - write_CTRL(cr | CFG_SPI_WRITE); + write_CTRL(drv_data, (cr | CFG_SPI_WRITE)); drv_data->write(drv_data); @@ -878,7 +883,7 @@ static void pump_transfers(unsigned long data) "IO read: cr is 0x%x\n", cr); /* set SPI transfer mode */ - write_CTRL(cr | CFG_SPI_READ); + write_CTRL(drv_data, (cr | CFG_SPI_READ)); drv_data->read(drv_data); if (drv_data->rx != drv_data->rx_end) @@ -1075,20 +1080,20 @@ static int setup(struct spi_device *spi) * if any one SPI chip is registered and wants DMA, request the * DMA channel for it */ - if (chip->enable_dma && !dma_requested) { + if (chip->enable_dma && !drv_data->dma_requested) { /* register dma irq handler */ - if (request_dma(spi_dma_ch, "BF53x_SPI_DMA") < 0) { + if (request_dma(drv_data->dma_channel, "BF53x_SPI_DMA") < 0) { dev_dbg(&spi->dev, "Unable to request BlackFin SPI DMA channel\n"); return -ENODEV; } - if (set_dma_callback(spi_dma_ch, (void *)dma_irq_handler, - drv_data) < 0) { + if (set_dma_callback(drv_data->dma_channel, + (void *)dma_irq_handler, drv_data) < 0) { dev_dbg(&spi->dev, "Unable to set dma callback\n"); return -EPERM; } - dma_disable_irq(spi_dma_ch); - dma_requested = 1; + dma_disable_irq(drv_data->dma_channel); + drv_data->dma_requested = 1; } /* @@ -1304,15 +1309,16 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev) goto out_error_get_res; } - spi_regs_base = (u32) ioremap(res->start, (res->end - res->start)+1); - if (!spi_regs_base) { + drv_data->regs_base = (u32) ioremap(res->start, + (res->end - res->start + 1)); + if (!drv_data->regs_base) { dev_err(dev, "Cannot map IO\n"); status = -ENXIO; goto out_error_ioremap; } - spi_dma_ch = platform_get_irq(pdev, 0); - if (spi_dma_ch < 0) { + drv_data->dma_channel = platform_get_irq(pdev, 0); + if (drv_data->dma_channel < 0) { dev_err(dev, "No DMA channel specified\n"); status = -ENOENT; goto out_error_no_dma_ch; @@ -1344,14 +1350,15 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev) goto out_error; } - dev_info(dev, "%s, Version %s, regs_base @ 0x%08x\n", - DRV_DESC, DRV_VERSION, spi_regs_base); + dev_info(dev, "%s, Version %s, regs_base@0x%08x, dma channel@%d\n", + DRV_DESC, DRV_VERSION, drv_data->regs_base, + drv_data->dma_channel); return status; out_error_queue_alloc: destroy_queue(drv_data); out_error_no_dma_ch: - iounmap((void *) spi_regs_base); + iounmap((void *) drv_data->regs_base); out_error_ioremap: out_error_get_res: out_error: @@ -1379,8 +1386,8 @@ static int __devexit bfin5xx_spi_remove(struct platform_device *pdev) /* Release DMA */ if (drv_data->master_info->enable_dma) { - if (dma_channel_active(spi_dma_ch)) - free_dma(spi_dma_ch); + if (dma_channel_active(drv_data->dma_channel)) + free_dma(drv_data->dma_channel); } /* Disconnect from the SPI framework */ |