diff options
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/spi_bfin5xx.c | 119 |
1 files changed, 61 insertions, 58 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index d17ab37..ab483a0 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -1,7 +1,7 @@ /* * Blackfin On-Chip SPI Driver * - * Copyright 2004-2007 Analog Devices Inc. + * Copyright 2004-2010 Analog Devices Inc. * * Enter bugs at http://blackfin.uclinux.org/ * @@ -42,15 +42,15 @@ MODULE_LICENSE("GPL"); #define DONE_STATE ((void *)2) #define ERROR_STATE ((void *)-1) -struct master_data; +struct bfin_spi_master_data; -struct transfer_ops { - void (*write) (struct master_data *); - void (*read) (struct master_data *); - void (*duplex) (struct master_data *); +struct bfin_spi_transfer_ops { + void (*write) (struct bfin_spi_master_data *); + void (*read) (struct bfin_spi_master_data *); + void (*duplex) (struct bfin_spi_master_data *); }; -struct master_data { +struct bfin_spi_master_data { /* Driver model hookup */ struct platform_device *pdev; @@ -80,7 +80,7 @@ struct master_data { /* Current message transfer state info */ struct spi_message *cur_msg; struct spi_transfer *cur_transfer; - struct slave_data *cur_chip; + struct bfin_spi_slave_data *cur_chip; size_t len_in_bytes; size_t len; void *tx; @@ -105,10 +105,10 @@ struct master_data { u16 flag_reg; int cs_change; - const struct transfer_ops *ops; + const struct bfin_spi_transfer_ops *ops; }; -struct slave_data { +struct bfin_spi_slave_data { u16 ctl_reg; u16 baud; u16 flag; @@ -119,13 +119,13 @@ struct slave_data { u32 cs_gpio; u16 idle_tx_val; u8 pio_interrupt; /* use spi data irq */ - const struct transfer_ops *ops; + const struct bfin_spi_transfer_ops *ops; }; #define DEFINE_SPI_REG(reg, off) \ -static inline u16 read_##reg(struct master_data *drv_data) \ +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 master_data *drv_data, u16 v) \ +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) @@ -136,7 +136,7 @@ DEFINE_SPI_REG(RDBR, 0x10) DEFINE_SPI_REG(BAUD, 0x14) DEFINE_SPI_REG(SHAW, 0x18) -static void bfin_spi_enable(struct master_data *drv_data) +static void bfin_spi_enable(struct bfin_spi_master_data *drv_data) { u16 cr; @@ -144,7 +144,7 @@ static void bfin_spi_enable(struct master_data *drv_data) write_CTRL(drv_data, (cr | BIT_CTL_ENABLE)); } -static void bfin_spi_disable(struct master_data *drv_data) +static void bfin_spi_disable(struct bfin_spi_master_data *drv_data) { u16 cr; @@ -167,7 +167,7 @@ static u16 hz_to_spi_baud(u32 speed_hz) return spi_baud; } -static int bfin_spi_flush(struct master_data *drv_data) +static int bfin_spi_flush(struct bfin_spi_master_data *drv_data) { unsigned long limit = loops_per_jiffy << 1; @@ -181,7 +181,7 @@ static int bfin_spi_flush(struct master_data *drv_data) } /* Chip select operation functions for cs_change flag */ -static void bfin_spi_cs_active(struct master_data *drv_data, struct slave_data *chip) +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); @@ -194,7 +194,8 @@ static void bfin_spi_cs_active(struct master_data *drv_data, struct slave_data * } } -static void bfin_spi_cs_deactive(struct master_data *drv_data, struct slave_data *chip) +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); @@ -212,7 +213,8 @@ static void bfin_spi_cs_deactive(struct master_data *drv_data, struct slave_data } /* enable or disable the pin muxed by GPIO and SPI CS to work as SPI CS */ -static inline void bfin_spi_cs_enable(struct master_data *drv_data, struct slave_data *chip) +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); @@ -223,7 +225,8 @@ static inline void bfin_spi_cs_enable(struct master_data *drv_data, struct slave } } -static inline void bfin_spi_cs_disable(struct master_data *drv_data, struct slave_data *chip) +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); @@ -235,9 +238,9 @@ static inline void bfin_spi_cs_disable(struct master_data *drv_data, struct slav } /* stop controller and re-config current chip*/ -static void bfin_spi_restore_state(struct master_data *drv_data) +static void bfin_spi_restore_state(struct bfin_spi_master_data *drv_data) { - struct slave_data *chip = drv_data->cur_chip; + struct bfin_spi_slave_data *chip = drv_data->cur_chip; /* Clear status and disable clock */ write_STAT(drv_data, BIT_STAT_CLR); @@ -255,12 +258,12 @@ static void bfin_spi_restore_state(struct 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 master_data *drv_data) +static inline void bfin_spi_dummy_read(struct bfin_spi_master_data *drv_data) { (void) read_RDBR(drv_data); } -static void bfin_spi_u8_writer(struct master_data *drv_data) +static void bfin_spi_u8_writer(struct bfin_spi_master_data *drv_data) { /* clear RXS (we check for RXS inside the loop) */ bfin_spi_dummy_read(drv_data); @@ -276,7 +279,7 @@ static void bfin_spi_u8_writer(struct master_data *drv_data) } } -static void bfin_spi_u8_reader(struct master_data *drv_data) +static void bfin_spi_u8_reader(struct bfin_spi_master_data *drv_data) { u16 tx_val = drv_data->cur_chip->idle_tx_val; @@ -291,7 +294,7 @@ static void bfin_spi_u8_reader(struct master_data *drv_data) } } -static void bfin_spi_u8_duplex(struct master_data *drv_data) +static void bfin_spi_u8_duplex(struct bfin_spi_master_data *drv_data) { /* discard old RX data and clear RXS */ bfin_spi_dummy_read(drv_data); @@ -304,13 +307,13 @@ static void bfin_spi_u8_duplex(struct master_data *drv_data) } } -static const struct transfer_ops bfin_transfer_ops_u8 = { +static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u8 = { .write = bfin_spi_u8_writer, .read = bfin_spi_u8_reader, .duplex = bfin_spi_u8_duplex, }; -static void bfin_spi_u16_writer(struct master_data *drv_data) +static void bfin_spi_u16_writer(struct bfin_spi_master_data *drv_data) { /* clear RXS (we check for RXS inside the loop) */ bfin_spi_dummy_read(drv_data); @@ -327,7 +330,7 @@ static void bfin_spi_u16_writer(struct master_data *drv_data) } } -static void bfin_spi_u16_reader(struct master_data *drv_data) +static void bfin_spi_u16_reader(struct bfin_spi_master_data *drv_data) { u16 tx_val = drv_data->cur_chip->idle_tx_val; @@ -343,7 +346,7 @@ static void bfin_spi_u16_reader(struct master_data *drv_data) } } -static void bfin_spi_u16_duplex(struct master_data *drv_data) +static void bfin_spi_u16_duplex(struct bfin_spi_master_data *drv_data) { /* discard old RX data and clear RXS */ bfin_spi_dummy_read(drv_data); @@ -358,14 +361,14 @@ static void bfin_spi_u16_duplex(struct master_data *drv_data) } } -static const struct transfer_ops bfin_transfer_ops_u16 = { +static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u16 = { .write = bfin_spi_u16_writer, .read = bfin_spi_u16_reader, .duplex = bfin_spi_u16_duplex, }; /* test if there is more transfer to be done */ -static void *bfin_spi_next_transfer(struct master_data *drv_data) +static void *bfin_spi_next_transfer(struct bfin_spi_master_data *drv_data) { struct spi_message *msg = drv_data->cur_msg; struct spi_transfer *trans = drv_data->cur_transfer; @@ -384,9 +387,9 @@ static void *bfin_spi_next_transfer(struct master_data *drv_data) * caller already set message->status; * dma and pio irqs are blocked give finished message back */ -static void bfin_spi_giveback(struct master_data *drv_data) +static void bfin_spi_giveback(struct bfin_spi_master_data *drv_data) { - struct slave_data *chip = drv_data->cur_chip; + struct bfin_spi_slave_data *chip = drv_data->cur_chip; struct spi_transfer *last_transfer; unsigned long flags; struct spi_message *msg; @@ -418,8 +421,8 @@ static void bfin_spi_giveback(struct master_data *drv_data) /* spi data irq handler */ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id) { - struct master_data *drv_data = dev_id; - struct slave_data *chip = drv_data->cur_chip; + struct bfin_spi_master_data *drv_data = dev_id; + struct bfin_spi_slave_data *chip = drv_data->cur_chip; struct spi_message *msg = drv_data->cur_msg; int n_bytes = drv_data->n_bytes; @@ -490,8 +493,8 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id) static irqreturn_t bfin_spi_dma_irq_handler(int irq, void *dev_id) { - struct master_data *drv_data = dev_id; - struct slave_data *chip = drv_data->cur_chip; + struct bfin_spi_master_data *drv_data = dev_id; + struct bfin_spi_slave_data *chip = drv_data->cur_chip; struct spi_message *msg = drv_data->cur_msg; unsigned long timeout; unsigned short dmastat = get_dma_curr_irqstat(drv_data->dma_channel); @@ -554,11 +557,11 @@ static irqreturn_t bfin_spi_dma_irq_handler(int irq, void *dev_id) static void bfin_spi_pump_transfers(unsigned long data) { - struct master_data *drv_data = (struct master_data *)data; + struct bfin_spi_master_data *drv_data = (struct bfin_spi_master_data *)data; struct spi_message *message = NULL; struct spi_transfer *transfer = NULL; struct spi_transfer *previous = NULL; - struct slave_data *chip = NULL; + struct bfin_spi_slave_data *chip = NULL; unsigned int bits_per_word; u16 cr, cr_width, dma_width, dma_config; u32 tranf_success = 1; @@ -643,12 +646,12 @@ static void bfin_spi_pump_transfers(unsigned long data) drv_data->n_bytes = 1; drv_data->len = transfer->len; cr_width = 0; - drv_data->ops = &bfin_transfer_ops_u8; + drv_data->ops = &bfin_bfin_spi_transfer_ops_u8; } else if (bits_per_word == 16) { drv_data->n_bytes = 2; drv_data->len = (transfer->len) >> 1; cr_width = BIT_CTL_WORDSIZE; - drv_data->ops = &bfin_transfer_ops_u16; + drv_data->ops = &bfin_bfin_spi_transfer_ops_u16; } else { dev_err(&drv_data->pdev->dev, "transfer: unsupported bits_per_word\n"); message->status = -EINVAL; @@ -661,7 +664,7 @@ static void bfin_spi_pump_transfers(unsigned long data) 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); + drv_data->ops, chip->ops, &bfin_bfin_spi_transfer_ops_u8); message->state = RUNNING_STATE; dma_config = 0; @@ -868,10 +871,10 @@ static void bfin_spi_pump_transfers(unsigned long data) /* pop a msg from queue and kick off real transfer */ static void bfin_spi_pump_messages(struct work_struct *work) { - struct master_data *drv_data; + struct bfin_spi_master_data *drv_data; unsigned long flags; - drv_data = container_of(work, struct master_data, pump_messages); + drv_data = container_of(work, struct bfin_spi_master_data, pump_messages); /* Lock queue and check for queue work */ spin_lock_irqsave(&drv_data->lock, flags); @@ -925,7 +928,7 @@ static void bfin_spi_pump_messages(struct work_struct *work) */ static int bfin_spi_transfer(struct spi_device *spi, struct spi_message *msg) { - struct master_data *drv_data = spi_master_get_devdata(spi->master); + struct bfin_spi_master_data *drv_data = spi_master_get_devdata(spi->master); unsigned long flags; spin_lock_irqsave(&drv_data->lock, flags); @@ -970,8 +973,8 @@ static u16 ssel[][MAX_SPI_SSEL] = { static int bfin_spi_setup(struct spi_device *spi) { struct bfin5xx_spi_chip *chip_info; - struct slave_data *chip = NULL; - struct master_data *drv_data = spi_master_get_devdata(spi->master); + struct bfin_spi_slave_data *chip = NULL; + struct bfin_spi_master_data *drv_data = spi_master_get_devdata(spi->master); u16 bfin_ctl_reg; int ret = -EINVAL; @@ -1152,8 +1155,8 @@ static int bfin_spi_setup(struct spi_device *spi) */ static void bfin_spi_cleanup(struct spi_device *spi) { - struct slave_data *chip = spi_get_ctldata(spi); - struct master_data *drv_data = spi_master_get_devdata(spi->master); + struct bfin_spi_slave_data *chip = spi_get_ctldata(spi); + struct bfin_spi_master_data *drv_data = spi_master_get_devdata(spi->master); if (!chip) return; @@ -1170,7 +1173,7 @@ static void bfin_spi_cleanup(struct spi_device *spi) spi_set_ctldata(spi, NULL); } -static inline int bfin_spi_init_queue(struct master_data *drv_data) +static inline int bfin_spi_init_queue(struct bfin_spi_master_data *drv_data) { INIT_LIST_HEAD(&drv_data->queue); spin_lock_init(&drv_data->lock); @@ -1192,7 +1195,7 @@ static inline int bfin_spi_init_queue(struct master_data *drv_data) return 0; } -static inline int bfin_spi_start_queue(struct master_data *drv_data) +static inline int bfin_spi_start_queue(struct bfin_spi_master_data *drv_data) { unsigned long flags; @@ -1214,7 +1217,7 @@ static inline int bfin_spi_start_queue(struct master_data *drv_data) return 0; } -static inline int bfin_spi_stop_queue(struct master_data *drv_data) +static inline int bfin_spi_stop_queue(struct bfin_spi_master_data *drv_data) { unsigned long flags; unsigned limit = 500; @@ -1243,7 +1246,7 @@ static inline int bfin_spi_stop_queue(struct master_data *drv_data) return status; } -static inline int bfin_spi_destroy_queue(struct master_data *drv_data) +static inline int bfin_spi_destroy_queue(struct bfin_spi_master_data *drv_data) { int status; @@ -1261,7 +1264,7 @@ static int __init bfin_spi_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct bfin5xx_spi_master *platform_info; struct spi_master *master; - struct master_data *drv_data; + struct bfin_spi_master_data *drv_data; struct resource *res; int status = 0; @@ -1371,7 +1374,7 @@ out_error_get_res: /* stop hardware and remove the driver */ static int __devexit bfin_spi_remove(struct platform_device *pdev) { - struct master_data *drv_data = platform_get_drvdata(pdev); + struct bfin_spi_master_data *drv_data = platform_get_drvdata(pdev); int status = 0; if (!drv_data) @@ -1410,7 +1413,7 @@ static int __devexit bfin_spi_remove(struct platform_device *pdev) #ifdef CONFIG_PM static int bfin_spi_suspend(struct platform_device *pdev, pm_message_t state) { - struct master_data *drv_data = platform_get_drvdata(pdev); + struct bfin_spi_master_data *drv_data = platform_get_drvdata(pdev); int status = 0; status = bfin_spi_stop_queue(drv_data); @@ -1431,7 +1434,7 @@ static int bfin_spi_suspend(struct platform_device *pdev, pm_message_t state) static int bfin_spi_resume(struct platform_device *pdev) { - struct master_data *drv_data = platform_get_drvdata(pdev); + struct bfin_spi_master_data *drv_data = platform_get_drvdata(pdev); int status = 0; write_CTRL(drv_data, drv_data->ctrl_reg); |