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Subject[PATCH 07/14] Blackfin SPI driver: Add SPI master controller platform device 1
Date
From: Sonic Zhang <sonic.zhang@analog.com>

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
---
drivers/spi/spi_bfin5xx.c | 52 ++++++++++++++++++++++++++------------------
1 files changed, 31 insertions(+), 21 deletions(-)
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 3f3630c..3bd8359 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -209,17 +209,26 @@ static void cs_deactive(struct chip_data *chip)
write_FLAG(flag);
}

-#define MAX_SPI0_SSEL 7
+#define MAX_SPI_SSEL 7

/* stop controller and re-config current chip*/
static int restore_state(struct driver_data *drv_data)
{
struct chip_data *chip = drv_data->cur_chip;
int ret = 0;
- u16 ssel[MAX_SPI0_SSEL] = {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
- P_SPI0_SSEL4, P_SPI0_SSEL5,
- P_SPI0_SSEL6, P_SPI0_SSEL7,};
-
+ u16 ssel[3][MAX_SPI_SSEL] = {
+ {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
+ P_SPI0_SSEL4, P_SPI0_SSEL5,
+ P_SPI0_SSEL6, P_SPI0_SSEL7},
+
+ {P_SPI1_SSEL1, P_SPI1_SSEL2, P_SPI1_SSEL3,
+ P_SPI1_SSEL4, P_SPI1_SSEL5,
+ P_SPI1_SSEL6, P_SPI1_SSEL7},
+
+ {P_SPI2_SSEL1, P_SPI2_SSEL2, P_SPI2_SSEL3,
+ P_SPI2_SSEL4, P_SPI2_SSEL5,
+ P_SPI2_SSEL6, P_SPI2_SSEL7},
+ };
/* Clear status and disable clock */
write_STAT(BIT_STAT_CLR);
bfin_spi_disable(drv_data);
@@ -234,9 +243,9 @@ static int restore_state(struct driver_data *drv_data)
int i = chip->chip_select_num;

dev_dbg(&drv_data->pdev->dev, "chip select number is %d\n", i);
-
- if ((i > 0) && (i <= MAX_SPI0_SSEL))
- ret = peripheral_request(ssel[i-1], DRV_NAME);
+ if ((i > 0) && (i <= MAX_SPI_SSEL))
+ ret = peripheral_request(
+ ssel[drv_data->master->bus_num][i-1], DRV_NAME);

chip->chip_select_requested = 1;
}
@@ -329,7 +338,6 @@ static void u8_reader(struct driver_data *drv_data)
write_TDBR(0xFFFF);

dummy_read();
-
while (drv_data->rx < drv_data->rx_end - 1) {
while (!(read_STAT() & BIT_STAT_RXS))
continue;
@@ -640,7 +648,6 @@ static void pump_transfers(unsigned long data)
message = drv_data->cur_msg;
transfer = drv_data->cur_transfer;
chip = drv_data->cur_chip;
-
/*
* if msg is error or done, report it back using complete() callback
*/
@@ -1202,17 +1209,20 @@ static inline int destroy_queue(struct driver_data *drv_data)
return 0;
}

-static int setup_pin_mux(int action)
+static int setup_pin_mux(int action, int bus_num)
{

- u16 pin_req[] = {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0};
+ u16 pin_req[3][4] = {
+ {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0},
+ {P_SPI1_SCK, P_SPI1_MISO, P_SPI1_MOSI, 0},
+ {P_SPI2_SCK, P_SPI2_MISO, P_SPI2_MOSI, 0},
+ };

if (action) {
- if (peripheral_request_list(pin_req, DRV_NAME)) {
+ if (peripheral_request_list(pin_req[bus_num], DRV_NAME))
return -EFAULT;
- }
} else {
- peripheral_free_list(pin_req);
+ peripheral_free_list(pin_req[bus_num]);
}

return 0;
@@ -1236,11 +1246,6 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev)
return -ENOMEM;
}

- if (setup_pin_mux(1)) {
- dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
- goto out_error;
- }
-
drv_data = spi_master_get_devdata(master);
drv_data->master = master;
drv_data->master_info = platform_info;
@@ -1295,6 +1300,11 @@ static int __init bfin5xx_spi_probe(struct platform_device *pdev)
goto out_error_queue_alloc;
}

+ if (setup_pin_mux(1, master->bus_num)) {
+ dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
+ goto out_error;
+ }
+
dev_info(dev, "%s, Version %s, regs_base @ 0x%08x\n",
DRV_DESC, DRV_VERSION, spi_regs_base);
return status;
@@ -1337,7 +1347,7 @@ static int __devexit bfin5xx_spi_remove(struct platform_device *pdev)
/* Disconnect from the SPI framework */
spi_unregister_master(drv_data->master);

- setup_pin_mux(0);
+ setup_pin_mux(0, drv_data->master->bus_num);

/* Prevent double remove */
platform_set_drvdata(pdev, NULL);
--
1.5.3.4
-
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