i.mx51 擴充ESDHC3 （kernel 2.6.31）

擴充一個ESDHC3

一、硬體接線：

ESDHC3 所用到的引腳

 

port            Pad                Mode CLK              NANDF_CS7             ALT5CMD              NANDF_RDY_INT         ALT5DAT0             NANDF_D8              ALT5DAT1             NANDF_D9              ALT5DAT2             NANDF_D10             ALT5DAT3/cd          NANDF_D11             ALT5

 

二、mmc3 驅動移植

正常的mmc1卡驅動的插入時的調試資訊

 

mmc1: new high speed SD card at address 0001 mmcblk1: mmc1:0001 APPSD 481 MiB  mmcblk1: p1

 

1、vi arch/arm/plat-mxc/include/mach/mx5x.h +238

238 + #define MXC_DMA_CHANNEL_MMC3        MXC_DMA_DYNAMIC_CHANNEL

 

2、cd kernel_imx-pad/arch/arm/mach-mx5/

vi mx51_babbage.c +903

 

903 +    mxcsdhc3_device.resource[2].start = IOMUX_TO_IRQ(MX51_PIN_GPIO1_6); 904 +    mxcsdhc3_device.resource[2].end = IOMUX_TO_IRQ(MX51_PIN_GPIO1_6); 905 +    mxcsdhc2_device.resource[2].start = 132; 906 +    mxcsdhc2_device.resource[2].end = 132;

 

 

-  static int sdhc_write_protect(struct device *dev) - { -  unsigned short rc = 0; -  if (to_platform_device(dev)->id == 0) -   rc = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_1)); -  else -   rc = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5)); -  return rc; - }  623 static int sdhc_write_protect(struct device *dev)  624 {  625     unsigned short rc = 0;  626   627     if (to_platform_device(dev)->id == 0){  628         rc = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_1));  629     }  630     if (to_platform_device(dev)->id == 1){  631         rc = 0 ;  632     }  633 //  else  634     if (to_platform_device(dev)->id == 2){  635         rc = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5));  636     }  637 //  printk("=============protect-rc=%d=====",rc);  638     return rc;  639 }

 

 

-  static unsigned int sdhc_get_card_det_status(struct device *dev) - { -  int ret; -  if (to_platform_device(dev)->id == 0) { -   ret = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_0)); -   return ret; -  } else {  /* config the det pin for SDHC2 */ -   if (board_is_rev(BOARD_REV_2)) -   /* BB2.5 */ -   ret = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_6)); -  else -   /* BB2.0 */ -   ret = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_4)); -  return ret; -  } - } //add  641 static unsigned int sdhc_get_card_det_status(struct device *dev)  642 {  643     int ret;  644   645     if (to_platform_device(dev)->id == 0) {  646         ret = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_0));  647     }  648     if (to_platform_device(dev)->id == 1) {  649         ret=0 ;  650     }  651     if (to_platform_device(dev)->id == 2) {  652         ret = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_6));  653     }  654 //  printk("=============protect-ret=%d=====",ret);  655     return ret ;  656   657 //  } else {        /* config the det pin for SDHC2 */  658 //      if (board_is_rev(BOARD_REV_2))  659 //          /* BB2.5 */  660 //          ret = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_6));  661 //      else  662 //          /* BB2.0 */  663 //          ret = gpio_get_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_4));  664 //      return ret;  665 //  }  666 }  //add  692 static struct mxc_mmc_platform_data mmc3_data = {  693     .ocr_mask = MMC_VDD_27_28 | MMC_VDD_28_29 | MMC_VDD_29_30 |  694         MMC_VDD_31_32,  695     .caps = MMC_CAP_4_BIT_DATA,  696     .min_clk = 150000,  697     .max_clk = 50000000,  698     .card_inserted_state = 0,  699     .status = sdhc_get_card_det_status,  700     .wp_status = sdhc_write_protect,  701     .clock_mmc = "esdhc_clk",  702 };

 

3、vi mx51_babbage_gpio.c

 

555 //add by renjie 556     mxc_iomux_set_input(MUX_IN_ESDHC3_IPP_DAT0_IN_SELECT_INPUT,0x01); 557     mxc_iomux_set_input(MUX_IN_ESDHC3_IPP_DAT1_IN_SELECT_INPUT,0x01); 558     mxc_iomux_set_input(MUX_IN_ESDHC3_IPP_DAT2_IN_SELECT_INPUT,0x01); 559     mxc_iomux_set_input(MUX_IN_ESDHC3_IPP_DAT3_IN_SELECT_INPUT,0x01); - if (board_is_rev(BOARD_REV_2)) { -  /* SD2 CD for BB2.5 */ -  gpio_request(IOMUX_TO_GPIO(MX51_PIN_GPIO1_6), "gpio1_6"); -  gpio_direction_input(IOMUX_TO_GPIO(MX51_PIN_GPIO1_6)); - } else { -  /* SD2 CD for BB2.0 */ -  gpio_request(IOMUX_TO_GPIO(MX51_PIN_GPIO1_4), "gpio1_4"); -  gpio_direction_input(IOMUX_TO_GPIO(MX51_PIN_GPIO1_4)); - } 569 +  //  if (board_is_rev(BOARD_REV_2)) { 570 +        /* SD2 CD for BB2.5 */ 571 +        gpio_request(IOMUX_TO_GPIO(MX51_PIN_GPIO1_6), "gpio1_6"); 572 +        gpio_direction_input(IOMUX_TO_GPIO(MX51_PIN_GPIO1_6)); 573 + //  } else { 574 +        /* SD2 CD for BB2.0 */ 575 +        gpio_request(IOMUX_TO_GPIO(MX51_PIN_GPIO1_4), "gpio1_4"); 576 +        gpio_direction_input(IOMUX_TO_GPIO(MX51_PIN_GPIO1_4)); 577 + //  }

 

 

//add 343      {          /* wifi Ctl */ 344      MX51_PIN_GPIO1_9, IOMUX_CONFIG_ALT0, 345      (PAD_CTL_SRE_SLOW | PAD_CTL_DRV_LOW | PAD_CTL_ODE_OPENDRAIN_NONE | 346               PAD_CTL_PUE_KEEPER | PAD_CTL_PKE_ENABLE | 347               PAD_CTL_HYS_ENABLE), 348      }, 349      //end  350     {    /* esdhc3 */ 351      MX51_PIN_NANDF_RDY_INT, IOMUX_CONFIG_ALT5 | IOMUX_CONFIG_SION, 352      (PAD_CTL_DRV_MAX | PAD_CTL_22K_PU | PAD_CTL_SRE_FAST), 353      }, 354     { 355      MX51_PIN_NANDF_CS7, IOMUX_CONFIG_ALT5 | IOMUX_CONFIG_SION, 356      (PAD_CTL_DRV_MAX | PAD_CTL_22K_PU | PAD_CTL_SRE_FAST), 357      }, 358     { 359      MX51_PIN_NANDF_D8, IOMUX_CONFIG_ALT5, 360      (PAD_CTL_DRV_MAX | PAD_CTL_22K_PU | PAD_CTL_SRE_FAST), 361      }, 362     { 363      MX51_PIN_NANDF_D9, IOMUX_CONFIG_ALT5, 364      (PAD_CTL_DRV_MAX | PAD_CTL_22K_PU | PAD_CTL_SRE_FAST), 365      }, 366     { 367      MX51_PIN_NANDF_D10, IOMUX_CONFIG_ALT5, 368      (PAD_CTL_DRV_MAX | PAD_CTL_22K_PU | PAD_CTL_SRE_FAST), 369      }, 370     { 371      MX51_PIN_NANDF_D11, IOMUX_CONFIG_ALT5, 372      (PAD_CTL_DRV_MAX | PAD_CTL_22K_PU | PAD_CTL_SRE_FAST), 373      },

 

4、vi kernel_imx-pad/arch/arm/mach-mx5/dma.c +250

 

//add for mmc3 static mxc_sdma_channel_params_t mxc_sdma_mmc2_width1_params = {  .chnl_params = {    .watermark_level = MXC_SDHC_MMC_WML,    .per_address =    MMC_SDHC3_BASE_ADDR + MXC_MMC_BUFFER_ACCESS,    .peripheral_type = MMC,    .transfer_type = per_2_emi,    .event_id = DMA_REQ_SDHC3,    .bd_number = 32,    .word_size = TRANSFER_32BIT,    },  .channel_num = MXC_DMA_CHANNEL_MMC3,  .chnl_priority = MXC_SDMA_DEFAULT_PRIORITY, }; static mxc_sdma_channel_params_t mxc_sdma_mmc2_width4_params = {  .chnl_params = {    .watermark_level = MXC_SDHC_SD_WML,    .per_address =    MMC_SDHC3_BASE_ADDR + MXC_MMC_BUFFER_ACCESS,    .peripheral_type = MMC,    .transfer_type = per_2_emi,    .event_id = DMA_REQ_SDHC3,    .bd_number = 32,    .word_size = TRANSFER_32BIT,    },  .channel_num = MXC_DMA_CHANNEL_MMC3,  .chnl_priority = MXC_SDMA_DEFAULT_PRIORITY, }; //add end //add 1137     {MXC_DMA_MMC3_WIDTH_1, &mxc_sdma_mmc3_width1_params}, 1138     {MXC_DMA_MMC3_WIDTH_4, &mxc_sdma_mmc3_width4_params},

 

5、dma.h

 

// add 40     MXC_DMA_MMC3_WIDTH_1, 41     MXC_DMA_MMC3_WIDTH_4,

 

6、driver/mmc/host/mx_sdhci.c  +969

 

- 969             if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) { - 970                 if (host->id == 0) - 971                     dev_id = MXC_DMA_MMC1_WIDTH_4; - 972                 else - 973                     dev_id = MXC_DMA_MMC2_WIDTH_4; - 974             } else { - 975                 if (host->id == 0) - 976                     dev_id = MXC_DMA_MMC1_WIDTH_1; - 977                 else - 978                     dev_id = MXC_DMA_MMC2_WIDTH_1; - 979             } //add    if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) {     if (host->id == 0){      dev_id = MXC_DMA_MMC1_WIDTH_4;     }     if (host->id == 1){      dev_id = MXC_DMA_MMC2_WIDTH_4;     }     if (host->id == 2){      dev_id = MXC_DMA_MMC3_WIDTH_4;     }    } else {     if (host->id == 0){      dev_id = MXC_DMA_MMC1_WIDTH_1;     }      if (host->id == 1){      dev_id = MXC_DMA_MMC2_WIDTH_1;     }      if (host->id == 2){      dev_id = MXC_DMA_MMC3_WIDTH_1     }    }