diff options
Diffstat (limited to 'recipes/linux/linux/acern30/spi.patch')
| -rw-r--r-- | recipes/linux/linux/acern30/spi.patch | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/recipes/linux/linux/acern30/spi.patch b/recipes/linux/linux/acern30/spi.patch new file mode 100644 index 0000000000..f835f82d32 --- /dev/null +++ b/recipes/linux/linux/acern30/spi.patch @@ -0,0 +1,121 @@ +Index: linux-2.6.14/arch/arm/mach-s3c2410/mach-n30.c +=================================================================== +--- linux-2.6.14.orig/arch/arm/mach-s3c2410/mach-n30.c ++++ linux-2.6.14/arch/arm/mach-s3c2410/mach-n30.c +@@ -52,6 +52,7 @@ + #include <asm/arch/regs-gpio.h> + #include <asm/arch/regs-lcd.h> + #include <asm/arch/regs-timer.h> ++#include <asm/arch/regs-spi.h> + #include <asm/arch/irqs.h> + #include <asm/arch/iic.h> + #include <asm/arch/fb.h> +@@ -372,6 +373,7 @@ static struct platform_device *n30_devic + &s3c_device_usbgadget, + &s3c_device_sdi, + &s3c_device_nand, ++ &s3c_device_spi1, + }; + + static struct s3c2410_platform_i2c n30_i2ccfg = { +@@ -712,6 +714,90 @@ static int n30_usbstart_thread(void *unu + return 0; + } + ++static int spi_thread(void *regs) ++{ ++ unsigned sptdat1 = ~0, sprdat1 = ~0, spsta1 = ~0; ++ unsigned value; ++ ++ writel(0x01, regs + S3C2410_SPCON); ++ writel(0x02, regs + S3C2410_SPPIN); ++ ++ s3c2410_gpio_cfgpin(S3C2410_GPG6, S3C2410_GPG6_SPIMOSI1); ++ s3c2410_gpio_cfgpin(S3C2410_GPG7, S3C2410_GPG7_SPICLK1); ++ ++ s3c2410_gpio_cfgpin(S3C2410_GPG3, 0x3 << 6); ++ ++ printk("GPGCON=0x%x\n", readl(S3C2410_GPGCON)); ++ ++ msleep(10); ++ ++ while (1) { ++ value = readl(regs + S3C2410_SPTDAT); ++ if (sptdat1 != value) { ++ printk(KERN_INFO "SPTDAT1=0x%x\n", value); ++ sptdat1 = value; ++ } ++ value = readl(regs + S3C2410_SPRDAT); ++ if (sprdat1 != value) { ++ printk(KERN_INFO "SPRDAT1=0x%x\n", value); ++ sprdat1 = value; ++ } ++ value = readl(regs + S3C2410_SPSTA); ++ if (spsta1 != value) { ++ printk(KERN_INFO "SPSTA1=0x%x\n", value); ++ spsta1 = value; ++ } ++ ++ msleep(10); ++ } ++} ++ ++static int s3c24xx_spi_probe(struct device *dev) ++{ ++ struct platform_device *pdev = to_platform_device(dev); ++ struct resource *res; ++ int ret; ++ void *regs; ++ struct resource *ioarea; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ if (res == NULL) { ++ dev_err(dev, "cannot find IO resource\n"); ++ ret = -ENOENT; ++ goto out; ++ } ++ ++ ioarea = request_mem_region(res->start, (res->end-res->start)+1, ++ pdev->name); ++ if (ioarea == NULL) { ++ dev_err(dev, "cannot request IO\n"); ++ ret = -ENXIO; ++ goto out; ++ } ++ ++ regs = ioremap(res->start, (res->end-res->start)+1); ++ if (regs == NULL) { ++ dev_err(dev, "cannot map IO\n"); ++ ret = -ENXIO; ++ goto out; ++ } ++ ++ dev_info(dev, "registers %p (%p, %p)\n", regs, ioarea, res); ++ ++ kthread_run(spi_thread, regs, "spi_debug"); ++ ++ ret = 0; ++ ++ out: ++ return ret; ++} ++ ++static struct device_driver s3c24xx_spi_driver = { ++ .name = "s3c2410-spi", ++ .bus = &platform_bus_type, ++ .probe = s3c24xx_spi_probe, ++}; ++ + #ifdef CONFIG_APM + static void n30_get_power_status(struct apm_power_info *info) + { +@@ -764,6 +850,9 @@ static void __init n30_init(void) + memcpy_toio(N30_RESUME_VA, (void *)n30_resume, + &n30_resume_end - (void *)n30_resume); + ++ if (driver_register(&s3c24xx_spi_driver) < 0) ++ printk(KERN_ERR "failed to register spi driver\n"); ++ + /* Clear any locks and write protects on the flash. */ + s3c2410_gpio_setpin(S3C2410_GPC5, 1); + msleep(1); |