4.0-华为MW269V2模块wifi调试

huawei MW269V2 是wifi+bt+fm三合一模块，wifi采用broadcom BCM4330，

SDIO接口。

s5pv210上面的android4.0.3 bsp，内核版本为3.0.8.

将开发板通过usb口上电，然后通过转接板插入tf卡接口，打印信息如下：

mmc_attach_sdio ENTER

mmc_attach_sdio mmc_attach_bus

mmc2: card claims to support voltages below the defined range. These will be ignored.

mmc2: error -84 whilst initialising SDIO card

mmc_rescan_try_freq not sdio!

mmc2: Timeout waiting for hardware interrupt.

查询头文件得到

#define EILSEQ          84      /* Illegal byte sequence */

对drivers/mmc/目录跟踪，

mmc_attach_sdio mmc_attach_bus

mmc_sdio_init_card ENTER >>

mmc_sdio_init_card ENTER

mmc_sdio_init_card mmc_host_is_spi

mmc_sdio_init_card mmc_alloc_card

mmc_sdio_init_card MMC_TYPE_SDIO

mmc_sdio_init_card init_card

mmc_sdio_init_card mmc_set_bus_mode

mmc_sdio_init_card mmc_send_relative_addr return 0

mmc_sdio_init_card mmc_sd_get_csd

mmc_sdio_init_card mmc_select_card

mmc_sdio_init_card set parameters

mmc_sdio_init_card sdio_read_cccr

mmc_sdio_init_card sdio_read_common_cis

mmc_sdio_init_card sdio_disable_cd

mmc_sdio_init_card sdio_enable_hs

mmc_sdio_init_card sdio_enable_4bit_bus

mmc2: error -84 whilst initialising SDIO card

mmc_rescan_try_freq not sdio!

而如果是烧写的android2.3.7的内核版本2.6.35.7，则很顺利识别到：

mmc2: new high speed SDIO card at address 0001

在找不到其他方法的情况下，决定将2.6.35.7的mmc堆栈移植到3.0.8.

将3.0.8中 drivers/mmc include/linux/mmc 删除，从2.6.35.7拷贝相应的

目录。然后需要改动的地方主要有arch/arm/mach-s5pv210和arch/arm/plat-samsung中一些文件。

其中arch/arm/mach-s5pv210/setup-sdhci.c 和  arch/arm/mach-s5pv210/setup-sdhci-gpio.c 如果完全采用2.6.35.7的，则可以正常的识别到sdio card。如果使用3.0.8

部分，则出现-84的错误。

经过排除，发现问题出在

void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)

使用2.6.35.7的代码：

void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)

{

unsigned int gpio;

switch (width) {

/* Channel 2 supports 4 and 8-bit bus width */

case 8:

/* Set all the necessary GPIO function and pull up/down */

for (gpio = S5PV210_GPG3(3); gpio <= S5PV210_GPG3(6); gpio++) {

s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));

s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);

s3c_gpio_set_drvstrength(gpio, S3C_GPIO_DRVSTR_2X);

}

case 0:

case 1:

case 4:

/* Set all the necessary GPIO function and pull up/down */

for (gpio = S5PV210_GPG2(0); gpio <= S5PV210_GPG2(6); gpio++) {

if (gpio != S5PV210_GPG2(2)) {

s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));

s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);

}

s3c_gpio_set_drvstrength(gpio, S3C_GPIO_DRVSTR_2X);

}

break;

default:

printk(KERN_ERR "Wrong SD/MMC bus width : %d\n", width);

}

}

则可以正常识别。

使用3.0.8的代码：

void s5pv210_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)

{

struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;

/* Set all the necessary GPG2[0:1] pins to special-function 2 */

s3c_gpio_cfgrange_nopull(S5PV210_GPG2(0), 2, S3C_GPIO_SFN(2));

switch (width) {

case 8:

/* Data pin GPG3[3:6] to special-function 3 */

s3c_gpio_cfgrange_nopull(S5PV210_GPG3(3), 4, S3C_GPIO_SFN(3));

case 4:

/* Data pin GPG2[3:6] to special-function 2 */

s3c_gpio_cfgrange_nopull(S5PV210_GPG2(3), 4, S3C_GPIO_SFN(2));

default:

break;

}

s3c_gpio_setpull(S5PV210_GPG2(2), S3C_GPIO_PULL_UP);

s3c_gpio_cfgpin(S5PV210_GPG2(2), S3C_GPIO_SFN(2));

}

则识别出错-84。

经过测试，是一定要设置强度：

s3c_gpio_set_drvstrength(S5PV210_GPG2(3), S3C_GPIO_DRVSTR_2X);

还要增加1bit的情况：

case 1:

s3c_gpio_cfgrange_nopull(S5PV210_GPG2(3), 1, S3C_GPIO_SFN(2));

s3c_gpio_set_drvstrength(S5PV210_GPG2(3), S3C_GPIO_DRVSTR_2X);

for (gpio = S5PV210_GPG2(0); gpio <= S5PV210_GPG2(1); gpio++) {

if (gpio != S5PV210_GPG2(2)) {

s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));

s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);

}

s3c_gpio_set_drvstrength(gpio, S3C_GPIO_DRVSTR_2X);

}

另外，需要增加对s3c_gpio_set_drvstrength()函数的支持。

arch/arm/mach-s5pv210/include/mach/irqs.h

#define S5P_IRQ_GPIOINT(x)     (S5P_GPIOINT_BASE + (x))

arch/arm/plat-samsung/include/plat/gpio-core.h

struct s3c_gpio_chip {

+  int  eint_offset;

};

从2.6.35.7拷贝 arch/arm/mach-s5pv210/gpiolib.c到3.0.8中

修改 arch/arm/mach-s5pv210/Makefile

-  obj-$(CONFIG_CPU_S5PV210) += cpu.o init.o clock.o dma.o

+ obj-$(CONFIG_CPU_S5PV210) += cpu.o init.o clock.o dma.o gpiolib.o

可以正常识别sdio设备后，"insmod /system/etc/bcm4330.ko", 不能load firmware，

也不能生成socket设备wlan0，而移植2.6.35.7版本的mmc是可以生成wlan0的，

从github上同步samsung-kernel-aries下来，

jeff@translogic:samsung-kernel-aries$ git branch -a

  android-samsung-2.6.35

* android-samsung-3.0-ics

  remotes/origin/HEAD -> origin/android-samsung-3.0-ics

  remotes/origin/android-samsung-2.6.35

  remotes/origin/android-samsung-3.0-ics

  remotes/origin/bluetooth

  remotes/origin/dock_audio

  remotes/origin/docking

  remotes/origin/ics

  remotes/origin/newfmradio

  remotes/origin/samsung-merge

  remotes/origin/sound

将其中 drivers/mmc  include/linux/mmc 部分更新过来，测试可以生成wlan0。