SDHC pins are multiplexed with IFC and ULPI interfaces. This patch intends to enable SDHC function in case of NOR/NAND/SPI boot aside from SD boot.
If "esdhc" is configured in hwconfig, u-boot will configure multiplexing pins from default IFC to SDHC at runtime to enable SD function. And add minimal necessary mux command for ifc/sdhc/ulpi to conveniently configure multiplexing pins without reboot or updating u-boot.
Signed-off-by: Shengzhou Liu Shengzhou.Liu@freescale.com --- v2: updated description.
board/freescale/p1010rdb/p1010rdb.c | 128 +++++++++++++++++++++++++++++++++--- include/configs/P1010RDB.h | 11 ++-- 2 files changed, 125 insertions(+), 14 deletions(-)
diff --git a/board/freescale/p1010rdb/p1010rdb.c b/board/freescale/p1010rdb/p1010rdb.c index 0c30d76..5a2f1f0 100644 --- a/board/freescale/p1010rdb/p1010rdb.c +++ b/board/freescale/p1010rdb/p1010rdb.c @@ -37,10 +37,8 @@ #include <asm/fsl_serdes.h> #include <asm/fsl_ifc.h> #include <asm/fsl_pci.h> - -#ifndef CONFIG_SDCARD #include <hwconfig.h> -#endif +#include <i2c.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -49,6 +47,19 @@ DECLARE_GLOBAL_DATA_PTR; #define MUX_CPLD_TDM 0x01 #define MUX_CPLD_SPICS0_FLASH 0x00 #define MUX_CPLD_SPICS0_SLIC 0x02 +#define PMUXCR1_IFC_MASK 0x00ffff00 +#define PMUXCR1_SDHC_MASK 0x00fff000 +#define PMUXCR1_SDHC_ENABLE 0x00555000 +#define PMUXCR1_ULPI_MASK 0x00ffffc0 +#define PMUXCR1_ULPI_ENABLE 0x00aaaa80 + +enum { + MUX_TYPE_IFC, + MUX_TYPE_SDHC, + MUX_TYPE_ULPI, +}; + +uint pin_mux;
#ifndef CONFIG_SDCARD struct cpld_data { @@ -262,6 +273,16 @@ void fdt_del_sdhc(void *blob) } }
+void fdt_del_ifc(void *blob) +{ + int nodeoff = 0; + + while ((nodeoff = fdt_node_offset_by_compatible(blob, 0, + "fsl,ifc")) >= 0) { + fdt_del_node(blob, nodeoff); + } +} + void fdt_disable_uart1(void *blob) { int nodeoff; @@ -305,9 +326,13 @@ void ft_board_setup(void *blob, bd_t *bd) fdt_del_flexcan(blob); fdt_del_node_and_alias(blob, "ethernet2"); } -#ifndef CONFIG_SDCARD - /* disable sdhc due to sdhc bug */ - fdt_del_sdhc(blob); + + /* Delete IFC node as IFC pins are multiplexing with SDHC */ + if (pin_mux != MUX_TYPE_IFC) + fdt_del_ifc(blob); + else + fdt_del_sdhc(blob); + if (hwconfig_subarg_cmp("fsl_p1010mux", "tdm_can", "can")) { fdt_del_tdm(blob); fdt_del_spi_slic(blob); @@ -325,13 +350,72 @@ void ft_board_setup(void *blob, bd_t *bd) fdt_del_flexcan(blob); fdt_disable_uart1(blob); } -#endif } #endif
+int config_pin_mux(int if_type) +{ + ccsr_gur_t __iomem *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); + u8 tmp; + uint orig_bus = i2c_get_bus_num(); + + i2c_set_bus_num(CONFIG_SYS_PCA9557_BUS_NUM); + tmp = 0xf0; + if (i2c_write(CONFIG_SYS_I2C_PCA9557_ADDR, 3, 1, &tmp, 1) < 0) + goto wr_err; + + switch (if_type) { + case MUX_TYPE_IFC: + tmp = 0x01; + if (i2c_write(CONFIG_SYS_I2C_PCA9557_ADDR, 1, 1, &tmp, 1) < 0) + goto wr_err; + pin_mux = MUX_TYPE_IFC; + clrbits_be32(&gur->pmuxcr, PMUXCR1_IFC_MASK); + debug("pin mux is configured for IFC, SDHC disabled\n"); + break; + case MUX_TYPE_SDHC: + tmp = 0x05; + if (i2c_write(CONFIG_SYS_I2C_PCA9557_ADDR, 1, 1, &tmp, 1) < 0) + goto wr_err; + pin_mux = MUX_TYPE_SDHC; + clrsetbits_be32(&gur->pmuxcr, PMUXCR1_SDHC_MASK, + PMUXCR1_SDHC_ENABLE); + debug("pin mux is configured for SDHC, IFC disabled\n"); + break; + case MUX_TYPE_ULPI: + tmp = 0x06; + if (i2c_write(CONFIG_SYS_I2C_PCA9557_ADDR, 1, 1, &tmp, 1) < 0) + goto wr_err; + pin_mux = MUX_TYPE_ULPI; + clrsetbits_be32(&gur->pmuxcr, PMUXCR1_ULPI_MASK, + PMUXCR1_ULPI_ENABLE); + debug("pin mux is configured for ULPI, IFC & SDHC disabled\n"); + break; + default: + printf("wrong mux interface type\n"); + i2c_set_bus_num(orig_bus); + return -1; + } + i2c_set_bus_num(orig_bus); + return 0; +wr_err: + printf("pca9557: i2c write failed\n"); + i2c_set_bus_num(orig_bus); + return -1; +} + #ifndef CONFIG_SDCARD +void board_reset(void) +{ + /* mux to IFC to enable CPLD for reset */ + if (pin_mux != MUX_TYPE_IFC) + config_pin_mux(MUX_TYPE_IFC); +} +#endif + int misc_init_r(void) { +#ifndef CONFIG_SDCARD struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE); ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
@@ -355,6 +439,34 @@ int misc_init_r(void) out_8(&cpld_data->spi_cs0_sel, MUX_CPLD_SPICS0_FLASH); }
+ if (hwconfig("esdhc")) { + pin_mux = MUX_TYPE_SDHC; + config_pin_mux(MUX_TYPE_SDHC); + } +#else + pin_mux = MUX_TYPE_SDHC; +#endif return 0; } -#endif + +static int pin_mux_cmd(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + if (argc < 2) + return CMD_RET_USAGE; + if (strcmp(argv[1], "ifc") == 0) + config_pin_mux(MUX_TYPE_IFC); + else if (strcmp(argv[1], "sdhc") == 0) + config_pin_mux(MUX_TYPE_SDHC); + else if (strcmp(argv[1], "ulpi") == 0) + config_pin_mux(MUX_TYPE_ULPI); + else + return CMD_RET_USAGE; + return 0; +} + +U_BOOT_CMD( + mux, 2, 0, pin_mux_cmd, + "configure multiplexing pin for IFC/SDHC/ULPI buses", + "bus_type[ifc/sdhc/ulpi] (e.g. mux sdhc)" +); diff --git a/include/configs/P1010RDB.h b/include/configs/P1010RDB.h index 5185597..259bb6a 100644 --- a/include/configs/P1010RDB.h +++ b/include/configs/P1010RDB.h @@ -156,11 +156,9 @@ #define CONFIG_DDR_CLK_FREQ 66666666 /* DDRCLK on P1010 RDB */ #define CONFIG_SYS_CLK_FREQ 66666666 /* SYSCLK for P1010 RDB */
-#ifndef CONFIG_SDCARD #define CONFIG_MISC_INIT_R -#endif - #define CONFIG_HWCONFIG + /* * These can be toggled for performance analysis, otherwise use default. */ @@ -485,6 +483,8 @@ extern unsigned long get_sdram_size(void); #define CONFIG_SYS_I2C_SLAVE 0x7F #define CONFIG_SYS_I2C_OFFSET 0x3000 #define CONFIG_SYS_I2C2_OFFSET 0x3100 +#define CONFIG_SYS_I2C_PCA9557_ADDR 0x18 +#define CONFIG_SYS_PCA9557_BUS_NUM 0
/* I2C EEPROM */ #undef CONFIG_ID_EEPROM @@ -570,11 +570,10 @@ extern unsigned long get_sdram_size(void); #define CONFIG_LBA48 #endif /* #ifdef CONFIG_FSL_SATA */
-/* SD interface will only be available in case of SD boot */ #ifdef CONFIG_SDCARD -#define CONFIG_MMC -#define CONFIG_DEF_HWCONFIG esdhc +#define CONFIG_DEF_HWCONFIG esdhc #endif +#define CONFIG_MMC
#ifdef CONFIG_MMC #define CONFIG_CMD_MMC