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spi/bfin_spi: convert read/write/duplex funcs to a dedicated ops structure

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Rather than having to look up the same 3 sets of functions at the same
time, just use an ops structure so we only need to set one pointer.

Reported-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2009-09-24 01:04:04 +00:00
parent f4f50c3ff7
commit 9c4542c7a3
1 changed files with 32 additions and 26 deletions
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58
drivers/spi/spi_bfin5xx.c
View file

@ -42,6 +42,14 @@ MODULE_LICENSE("GPL");
#define DONE_STATE ((void *)2)
#define ERROR_STATE ((void *)-1)
struct driver_data;
struct transfer_ops {
void (*write) (struct driver_data *);
void (*read) (struct driver_data *);
void (*duplex) (struct driver_data *);
};
struct driver_data {
/* Driver model hookup */
struct platform_device *pdev;
@ -94,9 +102,7 @@ struct driver_data {
size_t tx_map_len;
u8 n_bytes;
int cs_change;
void (*write) (struct driver_data *);
void (*read) (struct driver_data *);
void (*duplex) (struct driver_data *);
const struct transfer_ops *ops;
};
struct chip_data {
@ -113,9 +119,7 @@ struct chip_data {
u32 cs_gpio;
u16 idle_tx_val;
u8 pio_interrupt; /* use spi data irq */
void (*write) (struct driver_data *);
void (*read) (struct driver_data *);
void (*duplex) (struct driver_data *);
const struct transfer_ops *ops;
};
#define DEFINE_SPI_REG(reg, off) \
@ -294,6 +298,12 @@ static void bfin_spi_u8_duplex(struct driver_data *drv_data)
}
}
static const struct transfer_ops bfin_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 driver_data *drv_data)
{
/* clear RXS (we check for RXS inside the loop) */
@ -342,6 +352,12 @@ static void bfin_spi_u16_duplex(struct driver_data *drv_data)
}
}
static const struct transfer_ops bfin_transfer_ops_u16 = {
.write = bfin_spi_u16_writer,
.read = bfin_spi_u16_reader,
.duplex = bfin_spi_u16_duplex,
};
/* test if ther is more transfer to be done */
static void *bfin_spi_next_transfer(struct driver_data *drv_data)
{
@ -620,17 +636,13 @@ static void bfin_spi_pump_transfers(unsigned long data)
case 8:
drv_data->n_bytes = 1;
width = CFG_SPI_WORDSIZE8;
drv_data->read = bfin_spi_u8_reader;
drv_data->write = bfin_spi_u8_writer;
drv_data->duplex = bfin_spi_u8_duplex;
drv_data->ops = &bfin_transfer_ops_u8;
break;
case 16:
drv_data->n_bytes = 2;
width = CFG_SPI_WORDSIZE16;
drv_data->read = bfin_spi_u16_reader;
drv_data->write = bfin_spi_u16_writer;
drv_data->duplex = bfin_spi_u16_duplex;
drv_data->ops = &bfin_transfer_ops_u16;
break;
default:
@ -638,9 +650,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
transfer->bits_per_word = chip->bits_per_word;
drv_data->n_bytes = chip->n_bytes;
width = chip->width;
drv_data->write = chip->write;
drv_data->read = chip->read;
drv_data->duplex = chip->duplex;
drv_data->ops = chip->ops;
break;
}
cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
@ -653,8 +663,8 @@ static void bfin_spi_pump_transfers(unsigned long data)
drv_data->len = transfer->len;
}
dev_dbg(&drv_data->pdev->dev,
"transfer: drv_data->write is %p, chip->write is %p\n",
drv_data->write, chip->write);
"transfer: drv_data->ops is %p, chip->ops is %p, u8_ops is %p\n",
drv_data->ops, chip->ops, &bfin_transfer_ops_u8);
message->state = RUNNING_STATE;
dma_config = 0;
@ -819,7 +829,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
dev_dbg(&drv_data->pdev->dev,
"IO duplex: cr is 0x%x\n", cr);
drv_data->duplex(drv_data);
drv_data->ops->duplex(drv_data);
if (drv_data->tx != drv_data->tx_end)
tranf_success = 0;
@ -828,7 +838,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
dev_dbg(&drv_data->pdev->dev,
"IO write: cr is 0x%x\n", cr);
drv_data->write(drv_data);
drv_data->ops->write(drv_data);
if (drv_data->tx != drv_data->tx_end)
tranf_success = 0;
@ -837,7 +847,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
dev_dbg(&drv_data->pdev->dev,
"IO read: cr is 0x%x\n", cr);
drv_data->read(drv_data);
drv_data->ops->read(drv_data);
if (drv_data->rx != drv_data->rx_end)
tranf_success = 0;
}
@ -1032,17 +1042,13 @@ static int bfin_spi_setup(struct spi_device *spi)
case 8:
chip->n_bytes = 1;
chip->width = CFG_SPI_WORDSIZE8;
chip->read = bfin_spi_u8_reader;
chip->write = bfin_spi_u8_writer;
chip->duplex = bfin_spi_u8_duplex;
chip->ops = &bfin_transfer_ops_u8;
break;
case 16:
chip->n_bytes = 2;
chip->width = CFG_SPI_WORDSIZE16;
chip->read = bfin_spi_u16_reader;
chip->write = bfin_spi_u16_writer;
chip->duplex = bfin_spi_u16_duplex;
chip->ops = &bfin_transfer_ops_u16;
break;
default: