ssd支持SD卡

本文涉及 SSD202 做为主处理器芯片。

1 硬件设计

2 内核设置

2.1 DTS配置

2.1.1 引脚配置

SD卡：infinity2m-ssc010a-s01a-padmux-display.dtsi

<PAD_SD_CLK            PINMUX_FOR_I2C1_MODE_5       MDRV_PUSE_I2C1_SCL>,
<PAD_SD_CMD            PINMUX_FOR_I2C1_MODE_5       MDRV_PUSE_I2C1_SDA>,
<PAD_SD_D0            PINMUX_FOR_SDIO_MODE_1       MDRV_PUSE_SDIO0_D0 >,
<PAD_SD_D1              PINMUX_FOR_SDIO_MODE_1      MDRV_PUSE_SDIO0_D1>,
<PAD_SD_D2              PINMUX_FOR_SDIO_MODE_1      MDRV_PUSE_SDIO0_D2>,
<PAD_SD_D3            PINMUX_FOR_SDIO_MODE_1      MDRV_PUSE_SDIO0_D3>,
<PAD_PM_SD_CDZ          PINMUX_FOR_SDIO_MODE_1      MDRV_PUSE_SDIO0_CDZ>,

2.1.2 功能支持

参考自 ： infinity2m.dtsi

sdmmc {
            compatible = "sstar,sdmmc";

            slotnum = <1>;
            revcdz = <0>;

            slot-ip-orders = <0>,<1>,<2>;
            slot-pad-orders = <0>,<1>,<2>;
            slot-max-clks = <48000000>,<48000000>,<48000000>;
            slot-intcdzs = <1>,<1>,<1>;
            slot-fakecdzs = <0>,<0>,<0>;
            slot-cdzs-gpios = <PAD_PM_SD_CDZ>,<0>,<0>;
            slot-pwr-gpios = <PAD_GPIO0>,<0>,<0>; // ssc010a:PAD_TTL0 P2_ssc011a: PAD_GPIO0
            slot-pwr-off-delay = <30>,<30>,<30>;
            slot-sdio-use = <0>,<0>,<0>;

            interrupts-extended = <&ms_main_intc GIC_SPI INT_IRQ_SDIO IRQ_TYPE_LEVEL_HIGH>,//was INT_IRQ_SDIO
                                 <&ms_main_intc GIC_SPI INT_IRQ_SDIO IRQ_TYPE_LEVEL_HIGH>,
                                 <&ms_main_intc GIC_SPI INT_FIQ_SD_CDZ IRQ_TYPE_LEVEL_HIGH>,
                                 <&ms_gpi_intc 42>,
                                 <&ms_main_intc GIC_SPI INT_FIQ_SD_CDZ IRQ_TYPE_LEVEL_HIGH>;
            interrupt-names = "mie0_irq", "mie1_irq", "cdz_slot0_irq", "cdz_slot1_irq", "cdz_slot2_irq";

            //clocks = <&CLK_sdio>,<&GATE_MCM_sdio>,<&GATE_SRAM_sdio>;
            clocks = <&CLK_sdio>,<&CLK_sdio>,<&CLK_sdio>,
                     <&CLK_sdio>,<&CLK_sdio>,<&CLK_sdio>,
                     <&CLK_sdio>,<&CLK_sdio>,<&CLK_sdio>;
            status = "ok";
        };

2.2 内核配置

[*] Sstar Host patches 针对芯片的HOST补丁
开启wifi协议：
RF switch subsystem support —> wifi 控制使用
cfg80211 - wireless configuration API 网络协议版本

开启USB的通用选项即可：
Support for Host-side USB
EHCI HCD (USB 2.0) support

2 系统启动

kdrv_sdmmc 22743 0 - Live 0xbfb75000
sd_mod 19881 0 - Live 0xbfb4c000
scsi_mod 81133 1 sd_mod, Live 0xbfb91000
msdos 5294 0 - Live 0xbf988000
fat 39114 1 msdos, Live 0xbf977000
mmc_block 19282 0 - Live 0xbf893000
mmc_core 73771 2 kdrv_sdmmc,mmc_block, Live 0xbf878000

依次加载下列
驱动：
mmc_core.ko
mmc_block.ko
fat.ko
msdos.ko # 可以不用
vfat.ko
scsi_mod.ko
sd_mod.ko
kdrv_sdmmc.ko

可以在/dev/ 目录下看到mmcblk0，mmcblk0p1
挂载分区：
mount /dev/mmcblk0p1 /mnt -o iocharset=utf8