diff options
author | Mike Frysinger <vapier@gentoo.org> | 2011-06-17 04:16:56 -0400 |
---|---|---|
committer | Grant Likely <grant.likely@secretlab.ca> | 2011-06-17 08:35:55 -0600 |
commit | 47885ce81c7498c015e6763303821ab6e8a6e2cc (patch) | |
tree | 742eedea98667d5f266661cce0ca095656e6b8f5 /drivers/spi | |
parent | f8db4cc4f2b11bdded6c94f0d55906847474b982 (diff) |
spi/bfin_spi: use structs for accessing hardware regs
Rather than hardcoding the register sizes/offsets in this file, use the
existing struct in the spi header for reading/writing the hardware.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/spi-bfin5xx.c | 208 |
1 files changed, 84 insertions, 124 deletions
diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c index cc880c95e7d..73318318601 100644 --- a/drivers/spi/spi-bfin5xx.c +++ b/drivers/spi/spi-bfin5xx.c @@ -58,7 +58,7 @@ struct bfin_spi_master_data { struct spi_master *master; /* Regs base of SPI controller */ - void __iomem *regs_base; + struct bfin_spi_regs __iomem *regs; /* Pin request list */ u16 *pin_req; @@ -122,34 +122,14 @@ struct bfin_spi_slave_data { const struct bfin_spi_transfer_ops *ops; }; -#define DEFINE_SPI_REG(reg, off) \ -static inline u16 read_##reg(struct bfin_spi_master_data *drv_data) \ - { return bfin_read16(drv_data->regs_base + off); } \ -static inline void write_##reg(struct bfin_spi_master_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 bfin_spi_master_data *drv_data) { - u16 cr; - - cr = read_CTRL(drv_data); - write_CTRL(drv_data, (cr | BIT_CTL_ENABLE)); + bfin_write_or(&drv_data->regs->ctl, BIT_CTL_ENABLE); } static void bfin_spi_disable(struct bfin_spi_master_data *drv_data) { - u16 cr; - - cr = read_CTRL(drv_data); - write_CTRL(drv_data, (cr & (~BIT_CTL_ENABLE))); + bfin_write_and(&drv_data->regs->ctl, ~BIT_CTL_ENABLE); } /* Caculate the SPI_BAUD register value based on input HZ */ @@ -172,10 +152,10 @@ static int bfin_spi_flush(struct bfin_spi_master_data *drv_data) unsigned long limit = loops_per_jiffy << 1; /* wait for stop and clear stat */ - while (!(read_STAT(drv_data) & BIT_STAT_SPIF) && --limit) + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_SPIF) && --limit) cpu_relax(); - write_STAT(drv_data, BIT_STAT_CLR); + bfin_write(&drv_data->regs->stat, BIT_STAT_CLR); return limit; } @@ -183,29 +163,19 @@ static int bfin_spi_flush(struct bfin_spi_master_data *drv_data) /* Chip select operation functions for cs_change flag */ static void bfin_spi_cs_active(struct bfin_spi_master_data *drv_data, struct bfin_spi_slave_data *chip) { - if (likely(chip->chip_select_num < MAX_CTRL_CS)) { - u16 flag = read_FLAG(drv_data); - - flag &= ~chip->flag; - - write_FLAG(drv_data, flag); - } else { + if (likely(chip->chip_select_num < MAX_CTRL_CS)) + bfin_write_and(&drv_data->regs->flg, ~chip->flag); + else gpio_set_value(chip->cs_gpio, 0); - } } static void bfin_spi_cs_deactive(struct bfin_spi_master_data *drv_data, struct bfin_spi_slave_data *chip) { - if (likely(chip->chip_select_num < MAX_CTRL_CS)) { - u16 flag = read_FLAG(drv_data); - - flag |= chip->flag; - - write_FLAG(drv_data, flag); - } else { + if (likely(chip->chip_select_num < MAX_CTRL_CS)) + bfin_write_or(&drv_data->regs->flg, chip->flag); + else gpio_set_value(chip->cs_gpio, 1); - } /* Move delay here for consistency */ if (chip->cs_chg_udelay) @@ -216,25 +186,15 @@ static void bfin_spi_cs_deactive(struct bfin_spi_master_data *drv_data, static inline void bfin_spi_cs_enable(struct bfin_spi_master_data *drv_data, struct bfin_spi_slave_data *chip) { - if (chip->chip_select_num < MAX_CTRL_CS) { - u16 flag = read_FLAG(drv_data); - - flag |= (chip->flag >> 8); - - write_FLAG(drv_data, flag); - } + if (chip->chip_select_num < MAX_CTRL_CS) + bfin_write_or(&drv_data->regs->flg, chip->flag >> 8); } static inline void bfin_spi_cs_disable(struct bfin_spi_master_data *drv_data, struct bfin_spi_slave_data *chip) { - if (chip->chip_select_num < MAX_CTRL_CS) { - u16 flag = read_FLAG(drv_data); - - flag &= ~(chip->flag >> 8); - - write_FLAG(drv_data, flag); - } + if (chip->chip_select_num < MAX_CTRL_CS) + bfin_write_and(&drv_data->regs->flg, ~(chip->flag >> 8)); } /* stop controller and re-config current chip*/ @@ -243,15 +203,15 @@ static void bfin_spi_restore_state(struct bfin_spi_master_data *drv_data) struct bfin_spi_slave_data *chip = drv_data->cur_chip; /* Clear status and disable clock */ - write_STAT(drv_data, BIT_STAT_CLR); + bfin_write(&drv_data->regs->stat, BIT_STAT_CLR); bfin_spi_disable(drv_data); dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n"); SSYNC(); /* Load the registers */ - write_CTRL(drv_data, chip->ctl_reg); - write_BAUD(drv_data, chip->baud); + bfin_write(&drv_data->regs->ctl, chip->ctl_reg); + bfin_write(&drv_data->regs->baud, chip->baud); bfin_spi_enable(drv_data); bfin_spi_cs_active(drv_data, chip); @@ -260,7 +220,7 @@ static void bfin_spi_restore_state(struct bfin_spi_master_data *drv_data) /* used to kick off transfer in rx mode and read unwanted RX data */ static inline void bfin_spi_dummy_read(struct bfin_spi_master_data *drv_data) { - (void) read_RDBR(drv_data); + (void) bfin_read(&drv_data->regs->rdbr); } static void bfin_spi_u8_writer(struct bfin_spi_master_data *drv_data) @@ -269,10 +229,10 @@ static void bfin_spi_u8_writer(struct bfin_spi_master_data *drv_data) bfin_spi_dummy_read(drv_data); while (drv_data->tx < drv_data->tx_end) { - write_TDBR(drv_data, (*(u8 *) (drv_data->tx++))); + bfin_write(&drv_data->regs->tdbr, (*(u8 *) (drv_data->tx++))); /* wait until transfer finished. checking SPIF or TXS may not guarantee transfer completion */ - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_RXS)) cpu_relax(); /* discard RX data and clear RXS */ bfin_spi_dummy_read(drv_data); @@ -287,10 +247,10 @@ static void bfin_spi_u8_reader(struct bfin_spi_master_data *drv_data) bfin_spi_dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end) { - write_TDBR(drv_data, tx_val); - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + bfin_write(&drv_data->regs->tdbr, tx_val); + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_RXS)) cpu_relax(); - *(u8 *) (drv_data->rx++) = read_RDBR(drv_data); + *(u8 *) (drv_data->rx++) = bfin_read(&drv_data->regs->rdbr); } } @@ -300,10 +260,10 @@ static void bfin_spi_u8_duplex(struct bfin_spi_master_data *drv_data) bfin_spi_dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end) { - write_TDBR(drv_data, (*(u8 *) (drv_data->tx++))); - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + bfin_write(&drv_data->regs->tdbr, (*(u8 *) (drv_data->tx++))); + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_RXS)) cpu_relax(); - *(u8 *) (drv_data->rx++) = read_RDBR(drv_data); + *(u8 *) (drv_data->rx++) = bfin_read(&drv_data->regs->rdbr); } } @@ -319,11 +279,11 @@ static void bfin_spi_u16_writer(struct bfin_spi_master_data *drv_data) bfin_spi_dummy_read(drv_data); while (drv_data->tx < drv_data->tx_end) { - write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); + bfin_write(&drv_data->regs->tdbr, (*(u16 *) (drv_data->tx))); drv_data->tx += 2; /* wait until transfer finished. checking SPIF or TXS may not guarantee transfer completion */ - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_RXS)) cpu_relax(); /* discard RX data and clear RXS */ bfin_spi_dummy_read(drv_data); @@ -338,10 +298,10 @@ static void bfin_spi_u16_reader(struct bfin_spi_master_data *drv_data) bfin_spi_dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end) { - write_TDBR(drv_data, tx_val); - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + bfin_write(&drv_data->regs->tdbr, tx_val); + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_RXS)) cpu_relax(); - *(u16 *) (drv_data->rx) = read_RDBR(drv_data); + *(u16 *) (drv_data->rx) = bfin_read(&drv_data->regs->rdbr); drv_data->rx += 2; } } @@ -352,11 +312,11 @@ static void bfin_spi_u16_duplex(struct bfin_spi_master_data *drv_data) bfin_spi_dummy_read(drv_data); while (drv_data->rx < drv_data->rx_end) { - write_TDBR(drv_data, (*(u16 *) (drv_data->tx))); + bfin_write(&drv_data->regs->tdbr, (*(u16 *) (drv_data->tx))); drv_data->tx += 2; - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_RXS)) cpu_relax(); - *(u16 *) (drv_data->rx) = read_RDBR(drv_data); + *(u16 *) (drv_data->rx) = bfin_read(&drv_data->regs->rdbr); drv_data->rx += 2; } } @@ -428,7 +388,7 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id) int loop = 0; /* wait until transfer finished. */ - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_RXS)) cpu_relax(); if ((drv_data->tx && drv_data->tx >= drv_data->tx_end) || @@ -439,11 +399,11 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id) if (n_bytes % 2) { u16 *buf = (u16 *)drv_data->rx; for (loop = 0; loop < n_bytes / 2; loop++) - *buf++ = read_RDBR(drv_data); + *buf++ = bfin_read(&drv_data->regs->rdbr); } else { u8 *buf = (u8 *)drv_data->rx; for (loop = 0; loop < n_bytes; loop++) - *buf++ = read_RDBR(drv_data); + *buf++ = bfin_read(&drv_data->regs->rdbr); } drv_data->rx += n_bytes; } @@ -468,15 +428,15 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id) u16 *buf = (u16 *)drv_data->rx; u16 *buf2 = (u16 *)drv_data->tx; for (loop = 0; loop < n_bytes / 2; loop++) { - *buf++ = read_RDBR(drv_data); - write_TDBR(drv_data, *buf2++); + *buf++ = bfin_read(&drv_data->regs->rdbr); + bfin_write(&drv_data->regs->tdbr, *buf2++); } } else { u8 *buf = (u8 *)drv_data->rx; u8 *buf2 = (u8 *)drv_data->tx; for (loop = 0; loop < n_bytes; loop++) { - *buf++ = read_RDBR(drv_data); - write_TDBR(drv_data, *buf2++); + *buf++ = bfin_read(&drv_data->regs->rdbr); + bfin_write(&drv_data->regs->tdbr, *buf2++); } } } else if (drv_data->rx) { @@ -485,14 +445,14 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id) if (n_bytes % 2) { u16 *buf = (u16 *)drv_data->rx; for (loop = 0; loop < n_bytes / 2; loop++) { - *buf++ = read_RDBR(drv_data); - write_TDBR(drv_data, chip->idle_tx_val); + *buf++ = bfin_read(&drv_data->regs->rdbr); + bfin_write(&drv_data->regs->tdbr, chip->idle_tx_val); } } else { u8 *buf = (u8 *)drv_data->rx; for (loop = 0; loop < n_bytes; loop++) { - *buf++ = read_RDBR(drv_data); - write_TDBR(drv_data, chip->idle_tx_val); + *buf++ = bfin_read(&drv_data->regs->rdbr); + bfin_write(&drv_data->regs->tdbr, chip->idle_tx_val); } } } else if (drv_data->tx) { @@ -501,14 +461,14 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id) if (n_bytes % 2) { u16 *buf = (u16 *)drv_data->tx; for (loop = 0; loop < n_bytes / 2; loop++) { - read_RDBR(drv_data); - write_TDBR(drv_data, *buf++); + bfin_read(&drv_data->regs->rdbr); + bfin_write(&drv_data->regs->tdbr, *buf++); } } else { u8 *buf = (u8 *)drv_data->tx; for (loop = 0; loop < n_bytes; loop++) { - read_RDBR(drv_data); - write_TDBR(drv_data, *buf++); + bfin_read(&drv_data->regs->rdbr); + bfin_write(&drv_data->regs->tdbr, *buf++); } } } @@ -528,19 +488,19 @@ static irqreturn_t bfin_spi_dma_irq_handler(int irq, void *dev_id) struct spi_message *msg = drv_data->cur_msg; unsigned long timeout; unsigned short dmastat = get_dma_curr_irqstat(drv_data->dma_channel); - u16 spistat = read_STAT(drv_data); + u16 spistat = bfin_read(&drv_data->regs->stat); dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler dmastat:0x%x spistat:0x%x\n", dmastat, spistat); if (drv_data->rx != NULL) { - u16 cr = read_CTRL(drv_data); + u16 cr = bfin_read(&drv_data->regs->ctl); /* discard old RX data and clear RXS */ bfin_spi_dummy_read(drv_data); - write_CTRL(drv_data, cr & ~BIT_CTL_ENABLE); /* Disable SPI */ - write_CTRL(drv_data, cr & ~BIT_CTL_TIMOD); /* Restore State */ - write_STAT(drv_data, BIT_STAT_CLR); /* Clear Status */ + bfin_write(&drv_data->regs->ctl, cr & ~BIT_CTL_ENABLE); /* Disable SPI */ + bfin_write(&drv_data->regs->ctl, cr & ~BIT_CTL_TIMOD); /* Restore State */ + bfin_write(&drv_data->regs->stat, BIT_STAT_CLR); /* Clear Status */ } clear_dma_irqstat(drv_data->dma_channel); @@ -552,17 +512,17 @@ static irqreturn_t bfin_spi_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(drv_data) & BIT_STAT_TXS) || - (read_STAT(drv_data) & BIT_STAT_TXS)) + while ((bfin_read(&drv_data->regs->stat) & BIT_STAT_TXS) || + (bfin_read(&drv_data->regs->stat) & BIT_STAT_TXS)) cpu_relax(); } dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler dmastat:0x%x spistat:0x%x\n", - dmastat, read_STAT(drv_data)); + dmastat, bfin_read(&drv_data->regs->stat)); timeout = jiffies + HZ; - while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_SPIF)) if (!time_before(jiffies, timeout)) { dev_warn(&drv_data->pdev->dev, "timeout waiting for SPIF"); break; @@ -699,9 +659,9 @@ static void bfin_spi_pump_transfers(unsigned long data) bfin_spi_giveback(drv_data); return; } - cr = read_CTRL(drv_data) & ~(BIT_CTL_TIMOD | BIT_CTL_WORDSIZE); + cr = bfin_read(&drv_data->regs->ctl) & ~(BIT_CTL_TIMOD | BIT_CTL_WORDSIZE); cr |= cr_width; - write_CTRL(drv_data, cr); + bfin_write(&drv_data->regs->ctl, cr); dev_dbg(&drv_data->pdev->dev, "transfer: drv_data->ops is %p, chip->ops is %p, u8_ops is %p\n", @@ -712,11 +672,11 @@ static void bfin_spi_pump_transfers(unsigned long data) /* Speed setup (surely valid because already checked) */ if (transfer->speed_hz) - write_BAUD(drv_data, hz_to_spi_baud(transfer->speed_hz)); + bfin_write(&drv_data->regs->baud, hz_to_spi_baud(transfer->speed_hz)); else - write_BAUD(drv_data, chip->baud); + bfin_write(&drv_data->regs->baud, chip->baud); - write_STAT(drv_data, BIT_STAT_CLR); + bfin_write(&drv_data->regs->stat, BIT_STAT_CLR); bfin_spi_cs_active(drv_data, chip); dev_dbg(&drv_data->pdev->dev, @@ -749,7 +709,7 @@ static void bfin_spi_pump_transfers(unsigned long data) } /* poll for SPI completion before start */ - while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) + while (!(bfin_read(&drv_data->regs->stat) & BIT_STAT_SPIF)) cpu_relax(); /* dirty hack for autobuffer DMA mode */ @@ -766,7 +726,7 @@ static void bfin_spi_pump_transfers(unsigned long data) enable_dma(drv_data->dma_channel); /* start SPI transfer */ - write_CTRL(drv_data, cr | BIT_CTL_TIMOD_DMA_TX); + bfin_write(&drv_data->regs->ctl, cr | BIT_CTL_TIMOD_DMA_TX); /* just return here, there can only be one transfer * in this mode @@ -821,7 +781,7 @@ static void bfin_spi_pump_transfers(unsigned long data) set_dma_config(drv_data->dma_channel, dma_config); local_irq_save(flags); SSYNC(); - write_CTRL(drv_data, cr); + bfin_write(&drv_data->regs->ctl, cr); enable_dma(drv_data->dma_channel); dma_enable_irq(drv_data->dma_channel); local_irq_restore(flags); @@ -835,7 +795,7 @@ static void bfin_spi_pump_transfers(unsigned long data) * problems with setting up the output value in TDBR prior to the * start of the transfer. */ - write_CTRL(drv_data, cr | BIT_CTL_TXMOD); + bfin_write(&drv_data->regs->ctl, cr | BIT_CTL_TXMOD); if (chip->pio_interrupt) { /* SPI irq should have been disabled by now */ @@ -845,19 +805,19 @@ static void bfin_spi_pump_transfers(unsigned long data) /* start transfer */ if (drv_data->tx == NULL) - write_TDBR(drv_data, chip->idle_tx_val); + bfin_write(&drv_data->regs->tdbr, chip->idle_tx_val); else { int loop; if (bits_per_word % 16 == 0) { u16 *buf = (u16 *)drv_data->tx; for (loop = 0; loop < bits_per_word / 16; loop++) { - write_TDBR(drv_data, *buf++); + bfin_write(&drv_data->regs->tdbr, *buf++); } } else if (bits_per_word % 8 == 0) { u8 *buf = (u8 *)drv_data->tx; for (loop = 0; loop < bits_per_word / 8; loop++) - write_TDBR(drv_data, *buf++); + bfin_write(&drv_data->regs->tdbr, *buf++); } drv_data->tx += drv_data->n_bytes; @@ -1353,8 +1313,8 @@ static int __init bfin_spi_probe(struct platform_device *pdev) goto out_error_get_res; } - drv_data->regs_base = ioremap(res->start, resource_size(res)); - if (drv_data->regs_base == NULL) { + drv_data->regs = ioremap(res->start, resource_size(res)); + if (drv_data->regs == NULL) { dev_err(dev, "Cannot map IO\n"); status = -ENXIO; goto out_error_ioremap; @@ -1397,8 +1357,8 @@ static int __init bfin_spi_probe(struct platform_device *pdev) /* Reset SPI registers. If these registers were used by the boot loader, * the sky may fall on your head if you enable the dma controller. */ - write_CTRL(drv_data, BIT_CTL_CPHA | BIT_CTL_MASTER); - write_FLAG(drv_data, 0xFF00); + bfin_write(&drv_data->regs->ctl, BIT_CTL_CPHA | BIT_CTL_MASTER); + bfin_write(&drv_data->regs->flg, 0xFF00); /* Register with the SPI framework */ platform_set_drvdata(pdev, drv_data); @@ -1408,15 +1368,15 @@ static int __init bfin_spi_probe(struct platform_device *pdev) goto out_error_queue_alloc; } - dev_info(dev, "%s, Version %s, regs_base@%p, dma channel@%d\n", - DRV_DESC, DRV_VERSION, drv_data->regs_base, + dev_info(dev, "%s, Version %s, regs@%p, dma channel@%d\n", + DRV_DESC, DRV_VERSION, drv_data->regs, drv_data->dma_channel); return status; out_error_queue_alloc: bfin_spi_destroy_queue(drv_data); out_error_free_io: - iounmap((void *) drv_data->regs_base); + iounmap(drv_data->regs); out_error_ioremap: out_error_get_res: spi_master_put(master); @@ -1473,14 +1433,14 @@ static int bfin_spi_suspend(struct platform_device *pdev, pm_message_t state) if (status != 0) return status; - drv_data->ctrl_reg = read_CTRL(drv_data); - drv_data->flag_reg = read_FLAG(drv_data); + drv_data->ctrl_reg = bfin_read(&drv_data->regs->ctl); + drv_data->flag_reg = bfin_read(&drv_data->regs->flg); /* * reset SPI_CTL and SPI_FLG registers */ - write_CTRL(drv_data, BIT_CTL_CPHA | BIT_CTL_MASTER); - write_FLAG(drv_data, 0xFF00); + bfin_write(&drv_data->regs->ctl, BIT_CTL_CPHA | BIT_CTL_MASTER); + bfin_write(&drv_data->regs->flg, 0xFF00); return 0; } @@ -1490,8 +1450,8 @@ static int bfin_spi_resume(struct platform_device *pdev) struct bfin_spi_master_data *drv_data = platform_get_drvdata(pdev); int status = 0; - write_CTRL(drv_data, drv_data->ctrl_reg); - write_FLAG(drv_data, drv_data->flag_reg); + bfin_write(&drv_data->regs->ctl, drv_data->ctrl_reg); + bfin_write(&drv_data->regs->flg, drv_data->flag_reg); /* Start the queue running */ status = bfin_spi_start_queue(drv_data); |