Blackfin SPI Driver: pass DMA overflow error to the higher level

[safe/jmp/linux-2.6] / drivers / spi / spi_s3c24xx_gpio.c

diff --git a/drivers/spi/spi_s3c24xx_gpio.c b/drivers/spi/spi_s3c24xx_gpio.c
index a5d2cdf..f2447a5 100644 (file)
--- a/drivers/spi/spi_s3c24xx_gpio.c
+++ b/drivers/spi/spi_s3c24xx_gpio.c
@@ -15,14 +15,15 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/spinlock.h>
+#include <linux/workqueue.h>
 #include <linux/platform_device.h>
 
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_bitbang.h>
 
-#include <asm/arch/regs-gpio.h>
-#include <asm/arch/spi-gpio.h>
-#include <asm/arch/hardware.h>
+#include <mach/regs-gpio.h>
+#include <mach/spi-gpio.h>
+#include <mach/hardware.h>
 
 struct s3c2410_spigpio {
        struct spi_bitbang               bitbang;
@@ -33,7 +34,7 @@ struct s3c2410_spigpio {
 
 static inline struct s3c2410_spigpio *spidev_to_sg(struct spi_device *spi)
 {
-       return spi->controller_data;
+       return spi_master_get_devdata(spi->master);
 }
 
 static inline void setsck(struct spi_device *dev, int on)
@@ -72,6 +73,19 @@ static u32 s3c2410_spigpio_txrx_mode1(struct spi_device *spi,
        return bitbang_txrx_be_cpha1(spi, nsecs, 0, word, bits);
 }
 
+static u32 s3c2410_spigpio_txrx_mode2(struct spi_device *spi,
+                                     unsigned nsecs, u32 word, u8 bits)
+{
+       return bitbang_txrx_be_cpha0(spi, nsecs, 1, word, bits);
+}
+
+static u32 s3c2410_spigpio_txrx_mode3(struct spi_device *spi,
+                                     unsigned nsecs, u32 word, u8 bits)
+{
+       return bitbang_txrx_be_cpha1(spi, nsecs, 1, word, bits);
+}
+
+
 static void s3c2410_spigpio_chipselect(struct spi_device *dev, int value)
 {
        struct s3c2410_spigpio *sg = spidev_to_sg(dev);
@@ -82,10 +96,10 @@ static void s3c2410_spigpio_chipselect(struct spi_device *dev, int value)
 
 static int s3c2410_spigpio_probe(struct platform_device *dev)
 {
+       struct s3c2410_spigpio_info *info;
        struct spi_master       *master;
        struct s3c2410_spigpio  *sp;
        int ret;
-       int i;
 
        master = spi_alloc_master(&dev->dev, sizeof(struct s3c2410_spigpio));
        if (master == NULL) {
@@ -99,38 +113,36 @@ static int s3c2410_spigpio_probe(struct platform_device *dev)
        platform_set_drvdata(dev, sp);
 
        /* copy in the plkatform data */
-       sp->info = dev->dev.platform_data;
+       info = sp->info = dev->dev.platform_data;
 
        /* setup spi bitbang adaptor */
        sp->bitbang.master = spi_master_get(master);
+       sp->bitbang.master->bus_num = info->bus_num;
+       sp->bitbang.master->num_chipselect = info->num_chipselect;
        sp->bitbang.chipselect = s3c2410_spigpio_chipselect;
 
        sp->bitbang.txrx_word[SPI_MODE_0] = s3c2410_spigpio_txrx_mode0;
        sp->bitbang.txrx_word[SPI_MODE_1] = s3c2410_spigpio_txrx_mode1;
+       sp->bitbang.txrx_word[SPI_MODE_2] = s3c2410_spigpio_txrx_mode2;
+       sp->bitbang.txrx_word[SPI_MODE_3] = s3c2410_spigpio_txrx_mode3;
+
+       /* set state of spi pins, always assume that the clock is
+        * available, but do check the MOSI and MISO. */
+       s3c2410_gpio_setpin(info->pin_clk, 0);
+       s3c2410_gpio_cfgpin(info->pin_clk, S3C2410_GPIO_OUTPUT);
 
-       /* set state of spi pins */
-       s3c2410_gpio_setpin(sp->info->pin_clk, 0);
-       s3c2410_gpio_setpin(sp->info->pin_mosi, 0);
+       if (info->pin_mosi < S3C2410_GPH10) {
+               s3c2410_gpio_setpin(info->pin_mosi, 0);
+               s3c2410_gpio_cfgpin(info->pin_mosi, S3C2410_GPIO_OUTPUT);
+       }
 
-       s3c2410_gpio_cfgpin(sp->info->pin_clk, S3C2410_GPIO_OUTPUT);
-       s3c2410_gpio_cfgpin(sp->info->pin_mosi, S3C2410_GPIO_OUTPUT);
-       s3c2410_gpio_cfgpin(sp->info->pin_miso, S3C2410_GPIO_INPUT);
+       if (info->pin_miso != S3C2410_GPA0 && info->pin_miso < S3C2410_GPH10)
+               s3c2410_gpio_cfgpin(info->pin_miso, S3C2410_GPIO_INPUT);
 
        ret = spi_bitbang_start(&sp->bitbang);
        if (ret)
                goto err_no_bitbang;
 
-       /* register the chips to go with the board */
-
-       for (i = 0; i < sp->info->board_size; i++) {
-               dev_info(&dev->dev, "registering %p: %s\n",
-                        &sp->info->board_info[i],
-                        sp->info->board_info[i].modalias);
-
-               sp->info->board_info[i].controller_data = sp;
-               spi_new_device(master, sp->info->board_info + i);
-       }
-
        return 0;
 
  err_no_bitbang:
@@ -157,6 +169,8 @@ static int s3c2410_spigpio_remove(struct platform_device *dev)
 #define s3c2410_spigpio_suspend NULL
 #define s3c2410_spigpio_resume NULL
 
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:spi_s3c24xx_gpio");
 
 static struct platform_driver s3c2410_spigpio_drv = {
        .probe          = s3c2410_spigpio_probe,
@@ -164,7 +178,7 @@ static struct platform_driver s3c2410_spigpio_drv = {
         .suspend       = s3c2410_spigpio_suspend,
         .resume                = s3c2410_spigpio_resume,
         .driver                = {
-               .name   = "s3c24xx-spi-gpio",
+               .name   = "spi_s3c24xx_gpio",
                .owner  = THIS_MODULE,
         },
 };