Re: [Gumstix-users] Observations about 1531

[Dave H. <ozz...@gm...>]

Hi Dave,

Is there a neat way to rebuild the linux kernel with the patches? It doesn't
work just to rm vmlinux, I seem to have to remove the folder linux-2.6.21gum
from ./build_arm_nofpu.

Cheers
Dave


Dave Hylands wrote:
> 
> Hi Craig,
> 
> I just installed a vanilla 1531 u-boot, rootfs, and uImage onto my
> verdex 4XM with console-vx and netmicrosd.
> 
> As others have reported, u-boot's mmcinit reports "No MMC card found".
> 
> I'm using a 1 Gb SanDisk microSD/TransFlash card.
> 
> The logon instructions also seem to be out of date, suggesting that
> only MMC or CF can be supported, but doesn't a netwifimicrosd card
> require both?
> 
> When I boot up under linux, and do:
> 
> umount /mnt/mmc
> mount /mnt/mmc
> 
> I get:
> 
> mount: /dev/mmcblk0p1 is write-protected, mounting read-only
> 
> mi Shen posted a patch a few days ago, and I've taken the liberty of
> reworking it and have attached an updated version of
> target/device/Gumstix/kernel-patches/mmc-card-detect.patch which
> allows the microSD card to be writable under linux.
> 
> -- 
> Dave Hylands
> Vancouver, BC, Canada
> http://www.DaveHylands.com/
> 
> Index: linux-2.6.21gum/arch/arm/mach-pxa/gumstix.c
> ===================================================================
> --- linux-2.6.21gum.orig/arch/arm/mach-pxa/gumstix.c
> +++ linux-2.6.21gum/arch/arm/mach-pxa/gumstix.c
> @@ -29,19 +29,55 @@
>  
>  #include "generic.h"
>  
> -static int gumstix_mci_init(struct device *dev, irqreturn_t
> (*lubbock_detect_int)(int, void *, struct pt_regs *), void *data)
> +static struct pxamci_platform_data gumstix_mci_platform_data;
> +
> +static int gumstix_mci_init(struct device *dev, irqreturn_t
> (*gumstix_detect_int)(int, void *, struct pt_regs *), void *data)
>  {
> -	// Set up MMC controller
> +	int err;
> +
>  	pxa_gpio_mode(GPIO6_MMCCLK_MD);
>  	pxa_gpio_mode(GPIO53_MMCCLK_MD);
>  	pxa_gpio_mode(GPIO8_MMCCS0_MD);
>  
> +	pxa_gpio_mode(GUMSTIX_GPIO_nSD_DETECT | GPIO_IN);
> +	set_irq_type(GUMSTIX_IRQ_GPIO_nSD_DETECT, IRQT_BOTHEDGE);
> +	pxa_gpio_mode(GUMSTIX_GPIO_nSD_WP | GPIO_IN);
> +
> +	gumstix_mci_platform_data.detect_delay = msecs_to_jiffies(250);
> +
> +	err = request_irq(GUMSTIX_IRQ_GPIO_nSD_DETECT, gumstix_detect_int,
> SA_INTERRUPT,
> +			     "MMC card detect", data);
> +	if (err) {
> +		printk(KERN_ERR "gumstix_mci_init: MMC/SD: can't request MMC card
> detect IRQ\n");
> +		return -1;
> +	}
> +
> +	err = set_irq_type(GUMSTIX_IRQ_GPIO_nSD_DETECT, IRQT_BOTHEDGE);
> +
>  	return 0;
>  }
>  
> +static int gumstix_mci_get_ro(struct device *dev)
> +{
> +#ifdef CONFIG_ARCH_GUMSTIX_VERDEX
> +	return 0;	// microSD is always write-enabled
> +#else
> +	int ro;
> +	ro = GPLR(GUMSTIX_GPIO_nSD_WP) & GPIO_bit(GUMSTIX_GPIO_nSD_WP);
> +	return ro;
> +#endif
> +}
> +
> +static void gumstix_mci_exit(struct device *dev, void *data)
> +{
> +	free_irq(GUMSTIX_IRQ_GPIO_nSD_DETECT, data);
> +}
> +
>  static struct pxamci_platform_data gumstix_mci_platform_data = {
>  	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
> -	.init		= &gumstix_mci_init,
> +	.init		= gumstix_mci_init,
> +	.get_ro		= gumstix_mci_get_ro,
> +	.exit		= gumstix_mci_exit,
>  };
>  
>  static struct pxa2xx_udc_mach_info gumstix_udc_info __initdata = {
> Index: linux-2.6.21gum/include/asm-arm/arch-pxa/gumstix.h
> ===================================================================
> --- linux-2.6.21gum.orig/include/asm-arm/arch-pxa/gumstix.h
> +++ linux-2.6.21gum/include/asm-arm/arch-pxa/gumstix.h
> @@ -36,6 +36,12 @@
>  #define GPIO_GUMSTIX_USB_GPIOx_CON_MD	(GPIO_GUMSTIX_USB_GPIOx | GPIO_OUT)
>  #define GPIO_GUMSTIX_USB_GPIOx_DIS_MD	(GPIO_GUMSTIX_USB_GPIOx | GPIO_IN)
>  
> +/*
> + * SD/MMC definitions
> + */
> +#define GUMSTIX_GPIO_nSD_WP		22 /* SD Write Protect */
> +#define GUMSTIX_GPIO_nSD_DETECT		11 /* MMC/SD Card Detect */
> +#define GUMSTIX_IRQ_GPIO_nSD_DETECT	IRQ_GPIO(GUMSTIX_GPIO_nSD_DETECT)
>  
>  /*
>   * SMC Ethernet definitions
> 
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