Part Number: AM4376
Other Parts Discussed in Thread: SYSCONFIG, TPS65218
Hi,
SDK: ti-processor-sdk-linux-am437x-evm-04.02.00.09-Linux-x86
The customer mounts the eMMC device on the MMC2 bus and adds the corresponding configuration in dts.
1、Configuration in dts:
mmc3_pins_default: pinmux_mmc3_pins_default {
pinctrl-single,pins = <
0x1f0 ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (B15) mii1_txd0.mmc1_clk */
0x1f4 ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (A14) mii1_txd1.mmc1_cmd */
0x1f8 ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (D14) mii1_tx_clk.mmc1_dat0 * /
0x1fc ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (D13) mii1_rx_clk.mmc1_dat1 * /
0x200 ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (C14) mii1_rxd3.mmc1_dat2 */
0x204 ( PIN_INPUT_PULLUP | MUX_MODE3 ) /* (E16) mii1_rxd2.mmc1_dat3 */
>;
};
mmc3_pins_sleep: pinmux_mmc3_pins_Sleep {
pinctrl-single,pins = <
0x1f0 ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* (B15) mii1_txd0.mmc1_clk */
0x1f4 ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* (A14) mii1_txd1.mmc1_cmd */
0x1f8 ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* (D14) mii1_tx_clk.mmc1_dat0 */
0x1fc ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* (D13) mii1_rx_clk.mmc1_dat1 */
0x200 ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* (C14) mii1_rxd3.mmc1_dat2 * /
0x204 ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* (E16) mii1_rxd2.mmc1_dat3 * /
>;
};
&mmc3 {
status = "okay";
dmas = <&edma 3
&edma 31>
dma-names = "tx", "rx";
vmmc-supply = <&vmmcsd_fixed>;
bus-width = <4>;
pinctrl-names = "default", "sleep";
pinctrl-0 = <&mmc3_pins_default>;
pinctrl-1 = <&mmc3_pins_sleep>;
cap-power-off-card;
keep-power-in-suspend;
ti,non-removable;
#address-cells = <1>;
#size-cells = <0>;
};
2.
1）Pinmux configuration in board/ti/am43xx/mux.c
static struct module_pin_mux mmc2_pin_mux[] = {
{OFFSET(cam1_data2), (MODE(3) | PULLUDDIS | RXACTIVE)},
{OFFSET(cam1_data3), (MODE(3) | PULLUP_EN | RXACTIVE)},
{OFFSET(cam1_data4), (MODE(3) | PULLUP_EN | RXACTIVE)},
{OFFSET(cam1_data5), (MODE(3) | PULLUP_EN | RXACTIVE)},
{OFFSET(cam1_data6), (MODE(3) | PULLUP_EN | RXACTIVE)},
2）Add configure_module_pin_mux( mmc2_pin_mux ) in void enable_board_pin_mux(void）
3. Add #define OMAP_HSMMC3_BASE 0x47810100 in arch/arm/include/asm/arch-am33xx/mmc_host_def.h
4. Add #define BOOT_DEVICE_MMC3 0x09 in arch/arm/include/asm/arch-am33xx/spl.h
5. Add omap_mmc_init(2, 0, 0, -1, -1) in /arch/arm/mach-omap2/am33xx/board.c int cpu_mmc_init(bd_t *bis)
But when omap_hsmmc_init_setup is executed, the device will reboot.
static int omap_hsmmc_init_setup(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct hsmmc *mmc_base;
unsigned int reg_val;
unsigned int dsor;
ulong start;
mmc_base = priv->base_addr;
mmc_board_init(mmc);
writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET, &mmc_base->sysconfig); // reboot here
Boot log:
U-Boot 2017.01-00448-g801e17b-dirty
vertiv version:v1.0 (Dec 13 2021 - 14:33:24 +0800)
CPU : AM437X-GP rev 1.2
I2C: ready
DRAM: 1 GiB
PMIC: TPS65218
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1, OMAP SD/MMC: 2
SF: Detected n25q512 with page size 256 Bytes, erase size 4 KiB, total 64 MiB, mapped at 30000000
SF: Warning - Only lower 16MiB accessible, Full access #define CONFIG_SPI_FLASH_BAR
*** Warning - bad CRC, using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
Could not get PHY for cpsw: addr 3
cpsw, usb_ether
Hit any key to stop autoboot: 0
data abort
pc : [<bff4d558>] lr : [<bff4d550>]
reloc pc : [<30024558>] lr : [<30024550>]
sp : bdf18ae0 ip : 00000030 fp : bff32818
r10: bdf19520 r9 : bdf18ef8 r8 : bff8a514
r7 : 40000000 r6 : bdf19520 r5 : bdf194e0 r4 : 47810100
r3 : 00000020 r2 : 00000001 r1 : 0000000a r0 : 00000048
Flags: nZCv IRQs off FIQs off Mode SVC_32
Resetting CPU ...
resetting ...
CCCCCC
U-Boot 2017.01-00448-g801e17b-dirty
vertiv version:v1.0 (Dec 13 2021 - 14:33:24 +0800)
CPU : AM437X-GP rev 1.2
I2C: ready
DRAM: 1 GiB
PMIC: TPS65218
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1, OMAP SD/MMC: 2
SF: Detected n25q512 with page size 256 Bytes, erase size 4 KiB, total 64 MiB, mapped at 30000000
SF: Warning - Only lower 16MiB accessible, Full access #define CONFIG_SPI_FLASH_BAR
*** Warning - bad CRC, using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
Could not get PHY for cpsw: addr 3
cpsw, usb_ether
Hit any key to stop autoboot: 0
=>
=>
=>
=> mmc list
OMAP SD/MMC: 0
OMAP SD/MMC: 1
OMAP SD/MMC: 2
=> mmc dev 2
drivers/mmc/omap_hsmmc.c: omap_hsmmc_init_setup: 766
drivers/mmc/omap_hsmmc.c: omap_hsmmc_init_setup: 768
drivers/mmc/omap_hsmmc.c: omap_hsmmc_init_setup: 770
drivers/mmc/omap_hsmmc.c: omap_hsmmc_init_setup: 771: mmc_base:47810100
data abort
pc : [<bff4d558>] lr : [<bff4d550>]
reloc pc : [<30024558>] lr : [<30024550>]
sp : bdf18cf0 ip : 00000030 fp : bff32818
r10: bdf19520 r9 : bdf18ef8 r8 : bff8a514
r7 : 40000000 r6 : bdf19520 r5 : bdf194e0 r4 : 47810100
r3 : 00000020 r2 : 00000001 r1 : 0000000a r0 : 00000048
Flags: nZCv IRQs off FIQs off Mode SVC_32
Resetting CPU ...
resetting ...
