target/linux/pxa/patches-2.6.21/031-mmc-card-detect.patch

   1 Index: linux-2.6.21gum/arch/arm/mach-pxa/gumstix.c
   2 ===================================================================
   3 --- linux-2.6.21gum.orig/arch/arm/mach-pxa/gumstix.c
   4 +++ linux-2.6.21gum/arch/arm/mach-pxa/gumstix.c
   5 @@ -29,19 +29,55 @@
   6
   7  #include "generic.h"
   8
   9 -static int gumstix_mci_init(struct device *dev, irqreturn_t (*lubbock_detect_int)(int, void *, struct pt_regs *), void *data)
  10 +static struct pxamci_platform_data gumstix_mci_platform_data;
  11 +
  12 +static int gumstix_mci_init(struct device *dev, irqreturn_t (*gumstix_detect_int)(int, void *, struct pt_regs *), void *data)
  13  {
  14 -       // Set up MMC controller
  15 +       int err;
  16 +
  17         pxa_gpio_mode(GPIO6_MMCCLK_MD);
  18         pxa_gpio_mode(GPIO53_MMCCLK_MD);
  19         pxa_gpio_mode(GPIO8_MMCCS0_MD);
  20
  21 +       pxa_gpio_mode(GUMSTIX_GPIO_nSD_DETECT | GPIO_IN);
  22 +       set_irq_type(GUMSTIX_IRQ_GPIO_nSD_DETECT, IRQT_BOTHEDGE);
  23 +       pxa_gpio_mode(GUMSTIX_GPIO_nSD_WP | GPIO_IN);
  24 +
  25 +       gumstix_mci_platform_data.detect_delay = msecs_to_jiffies(250);
  26 +
  27 +       err = request_irq(GUMSTIX_IRQ_GPIO_nSD_DETECT, gumstix_detect_int, SA_INTERRUPT,
  28 +                            "MMC card detect", data);
  29 +       if (err) {
  30 +               printk(KERN_ERR "gumstix_mci_init: MMC/SD: can't request MMC card detect IRQ\n");
  31 +               return -1;
  32 +       }
  33 +
  34 +       err = set_irq_type(GUMSTIX_IRQ_GPIO_nSD_DETECT, IRQT_BOTHEDGE);
  35 +
  36         return 0;
  37  }
  38
  39 +static int gumstix_mci_get_ro(struct device *dev)
  40 +{
  41 +#ifdef CONFIG_ARCH_GUMSTIX_VERDEX
  42 +       return 0;       // microSD is always writable on verdex
  43 +#else
  44 +       int ro;
  45 +       ro = GPLR(GUMSTIX_GPIO_nSD_WP) & GPIO_bit(GUMSTIX_GPIO_nSD_WP);
  46 +       return ro;
  47 +#endif
  48 +}
  49 +
  50 +static void gumstix_mci_exit(struct device *dev, void *data)
  51 +{
  52 +       free_irq(GUMSTIX_IRQ_GPIO_nSD_DETECT, data);
  53 +}
  54 +
  55  static struct pxamci_platform_data gumstix_mci_platform_data = {
  56         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
  57 -       .init           = &gumstix_mci_init,
  58 +       .init           = gumstix_mci_init,
  59 +       .get_ro         = gumstix_mci_get_ro,
  60 +       .exit           = gumstix_mci_exit,
  61  };
  62
  63  static struct pxa2xx_udc_mach_info gumstix_udc_info __initdata = {
  64 Index: linux-2.6.21gum/include/asm-arm/arch-pxa/gumstix.h
  65 ===================================================================
  66 --- linux-2.6.21gum.orig/include/asm-arm/arch-pxa/gumstix.h
  67 +++ linux-2.6.21gum/include/asm-arm/arch-pxa/gumstix.h
  68 @@ -36,6 +36,12 @@
  69  #define GPIO_GUMSTIX_USB_GPIOx_CON_MD  (GPIO_GUMSTIX_USB_GPIOx | GPIO_OUT)
  70  #define GPIO_GUMSTIX_USB_GPIOx_DIS_MD  (GPIO_GUMSTIX_USB_GPIOx | GPIO_IN)
  71
  72 +/*
  73 + * SD/MMC definitions
  74 + */
  75 +#define GUMSTIX_GPIO_nSD_WP            22 /* SD Write Protect */
  76 +#define GUMSTIX_GPIO_nSD_DETECT                11 /* MMC/SD Card Detect */
  77 +#define GUMSTIX_IRQ_GPIO_nSD_DETECT    IRQ_GPIO(GUMSTIX_GPIO_nSD_DETECT)
  78
  79  /*
  80   * SMC Ethernet definitions