[OpenWrt-Devel] [PATCH] [ar71xx] stops qihoo 360 c301 booting into backup firmware

[Weijie Gao]

Hi,

It's great. I hope this can be applied.

However, your patch seems to be whitespace broken. Please fix it and resend.

Weijie Gao

On 2014/9/20 0:50, swigger wrote:
> Openwrt recently adds Qihoo [NYSE:QIHU] C301 router support.
> However, this router has a backup firmware in the second flash and the
> current trunk can only boot 3 times before u-boot boots into that backup
> firmware. This is a stratgy for unbricking. 
>
> This patch makes u-boot happy.
>
> Signed-off-by: Xungneg li <swigger at gmail.com>
>
> ===============================================================
> diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-qihoo-c301.c
> b/target/linux/ar71xx/files/arch/mips/ath79/mach-qihoo-c301.c
> index 08a602f..774356f 100644
> --- a/target/linux/ar71xx/files/arch/mips/ath79/mach-qihoo-c301.c
> +++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-qihoo-c301.c
> @@ -14,6 +14,8 @@
>  #include <linux/gpio.h>
>  #include <linux/platform_device.h>
>  #include <linux/ath9k_platform.h>
> +#include <linux/crc32.h>
> +#include <linux/mtd/mtd.h>
>  
>  #include <asm/mach-ath79/ar71xx_regs.h>
>  
> @@ -79,6 +81,7 @@ static struct gpio_keys_button qihoo_c301_gpio_keys[]
> __initdata = {
>  	},
>  };
>  
> +static int qihoo_c301_board = 0;
>  struct flash_platform_data flash __initdata = {NULL, NULL, 0};
>  
>  static void qihoo_c301_get_mac(const char *name, char *mac) @@ -98,6 +101,7
> @@ static void __init qihoo_c301_setup(void)
>  	u8 tmpmac[ETH_ALEN];
>  
>  	ath79_register_m25p80_multi(&flash);
> +	qihoo_c301_board = 1;
>  
>  	ath79_gpio_function_enable(AR934X_GPIO_FUNC_JTAG_DISABLE);
>  
> @@ -164,3 +168,86 @@ static void __init qihoo_c301_setup(void)
>  
>  MIPS_MACHINE(ATH79_MACH_QIHOO_C301, "QIHOO-C301", "Qihoo 360 C301",
>  	     qihoo_c301_setup);
> +
> +
> +//the following code stops qihoo's uboot booting into the backup system.
> +static void erase_callback(struct erase_info *erase) {
> +	char * buf = (char*) erase->priv;
> +	int ret;
> +	size_t nb=0;
> +
> +	if (erase->state == MTD_ERASE_DONE)
> +	{
> +		ret = mtd_write(erase->mtd, 0, 0x10000, &nb, buf);
> +	}
> +	kfree(erase);
> +	kfree(buf);
> +}
> +
> +static int qihoo_reset_trynum(void)
> +{
> +	size_t nb = 0;
> +	char *buf=0, *p;
> +	const char * match = "image1trynum=";
> +	size_t matchlen = strlen(match);
> +	struct erase_info *erase;
> +	struct mtd_info * mtd;
> +	unsigned int newcrc;
> +	int ret;
> +
> +	if (! qihoo_c301_board)
> +		return 0;
> +
> +	mtd = get_mtd_device_nm("action_image_config");
> +	if (IS_ERR(mtd))
> +	{
> +		return PTR_ERR(mtd);
> +	}
> +	if (mtd->size!=0x10000)
> +	{
> +		return -1;
> +	}
> +	buf = kzalloc(0x10000+4, GFP_KERNEL);
> +	ret = mtd_read(mtd, 0, 0x10000, &nb, buf);
> +	if (nb != 0x10000)
> +	{
> +		kfree(buf);
> +		return -1;
> +	}
> +	for (p=buf+4; *p; p+=strlen(p)+1)
> +	{
> +		if (strncmp(p, match, matchlen)==0)
> +		{
> +			p += matchlen;
> +			while (*p)
> +				*p++ = '0';
> +			break;
> +		}
> +	}
> +
> +	newcrc = crc32(~0, buf+4, 0xfffc)^0xffffffff;
> +	memcpy(buf, &newcrc, 4);
> +
> +	erase = kzalloc(sizeof(struct erase_info), GFP_KERNEL);
> +	if (!erase)
> +	{
> +		kfree(buf);
> +		return -1;
> +	}
> +	erase->mtd      = mtd;
> +	erase->callback = erase_callback;
> +	erase->addr     = 0;
> +	erase->len      = 0x10000;
> +	erase->priv     = (u_long) buf;
> +	ret = mtd_erase(mtd, erase);
> +
> +	if (ret) {
> +		kfree(buf);
> +		kfree(erase);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +late_initcall(qihoo_reset_trynum);
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