board/p1010rdb: add pin mux and sdhc support in any boot

Since pins multiplexing, SDHC shares signals with IFC, with this patch:
To enable SDHC in case of NOR/NAND/SPI boot
   a) For temporary use case in runtime without reboot system
      run 'mux sdhc' in u-boot to validate SDHC with invalidating IFC.
   b) For long-term use case
      set 'esdhc' in hwconfig and save it.
To enable IFC in case of SD boot
   a) For temporary use case in runtime without reboot system
      run 'mux ifc' in u-boot to validate IFC with invalidating SDHC.
   b) For long-term use case
      set 'ifc' in hwconfig and save it.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>

1 files changed, 105 insertions, 14 deletions

diff --git a/board/freescale/p1010rdb/p1010rdb.c b/board/freescale/p1010rdb/p1010rdb.c
index 42153e6dc0..ae8ba45e69 100644
--- a/board/freescale/p1010rdb/p1010rdb.c
+++ b/board/freescale/p1010rdb/p1010rdb.c
@@ -21,10 +21,8 @@
 #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;
 
@@ -33,8 +31,17 @@ 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
+
+enum {
+	MUX_TYPE_IFC,
+	MUX_TYPE_SDHC,
+};
+
+static uint sd_ifc_mux;
 
-#ifndef CONFIG_SDCARD
 struct cpld_data {
 	u8 cpld_ver; /* cpld revision */
 	u8 pcba_ver; /* pcb revision number */
@@ -52,17 +59,14 @@ struct cpld_data {
 	u8 por2; /* POR Options */
 	u8 por3; /* POR Options */
 };
-#endif
 
 int board_early_init_f(void)
 {
 	ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
-#ifndef CONFIG_SDCARD
 	struct fsl_ifc *ifc = (void *)CONFIG_SYS_IFC_ADDR;
 
 	/* Clock configuration to access CPLD using IFC(GPCM) */
 	setbits_be32(&ifc->ifc_gcr, 1 << IFC_GCR_TBCTL_TRN_TIME_SHIFT);
-#endif
 	/*
 	* Reset PCIe slots via GPIO4
 	*/
@@ -74,7 +78,6 @@ int board_early_init_f(void)
 
 int board_early_init_r(void)
 {
-#ifndef CONFIG_SDCARD
 	const unsigned int flashbase = CONFIG_SYS_FLASH_BASE;
 	const u8 flash_esel = find_tlb_idx((void *)flashbase, 1);
 
@@ -98,7 +101,6 @@ int board_early_init_r(void)
 			CONFIG_SYS_FLASH_BASE_PHYS + 0x1000000,
 			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 			0, flash_esel+1, BOOKE_PAGESZ_16M, 1);
-#endif
 	return 0;
 }
 
@@ -109,6 +111,38 @@ void pci_init_board(void)
 }
 #endif /* ifdef CONFIG_PCI */
 
+int config_board_mux(int ctrl_type)
+{
+	ccsr_gur_t __iomem *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	u8 tmp;
+
+	switch (ctrl_type) {
+	case MUX_TYPE_IFC:
+		i2c_set_bus_num(I2C_PCA9557_BUS_NUM);
+		tmp = 0xf0;
+		i2c_write(I2C_PCA9557_ADDR1, 3, 1, &tmp, 1);
+		tmp = 0x01;
+		i2c_write(I2C_PCA9557_ADDR1, 1, 1, &tmp, 1);
+		sd_ifc_mux = MUX_TYPE_IFC;
+		clrbits_be32(&gur->pmuxcr, PMUXCR1_IFC_MASK);
+		break;
+	case MUX_TYPE_SDHC:
+		i2c_set_bus_num(I2C_PCA9557_BUS_NUM);
+		tmp = 0xf0;
+		i2c_write(I2C_PCA9557_ADDR1, 3, 1, &tmp, 1);
+		tmp = 0x05;
+		i2c_write(I2C_PCA9557_ADDR1, 1, 1, &tmp, 1);
+		sd_ifc_mux = MUX_TYPE_SDHC;
+		clrsetbits_be32(&gur->pmuxcr, PMUXCR1_SDHC_MASK,
+				PMUXCR1_SDHC_ENABLE);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
 int checkboard(void)
 {
 	struct cpu_type *cpu;
@@ -116,6 +150,11 @@ int checkboard(void)
 	cpu = gd->arch.cpu;
 	printf("Board: %sRDB\n", cpu->name);
 
+#ifdef CONFIG_SDCARD
+	/* switch to IFC to read info from CPLD */
+	config_board_mux(MUX_TYPE_IFC);
+#endif
+
 	return 0;
 }
 
@@ -211,6 +250,16 @@ 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;
@@ -254,9 +303,13 @@ 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 (sd_ifc_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);
@@ -274,11 +327,25 @@ void ft_board_setup(void *blob, bd_t *bd)
 		fdt_del_flexcan(blob);
 		fdt_disable_uart1(blob);
 	}
+}
 #endif
+
+#ifdef CONFIG_SDCARD
+int board_mmc_init(bd_t *bis)
+{
+	config_board_mux(MUX_TYPE_SDHC);
+		return -1;
+}
+#else
+void board_reset(void)
+{
+	/* mux to IFC to enable CPLD for reset */
+	if (sd_ifc_mux != MUX_TYPE_IFC)
+		config_board_mux(MUX_TYPE_IFC);
 }
 #endif
 
-#ifndef CONFIG_SDCARD
+
 int misc_init_r(void)
 {
 	struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
@@ -304,6 +371,30 @@ int misc_init_r(void)
 		out_8(&cpld_data->spi_cs0_sel, MUX_CPLD_SPICS0_FLASH);
 	}
 
+	if (hwconfig("esdhc"))
+		config_board_mux(MUX_TYPE_SDHC);
+	else if (hwconfig("ifc"))
+		config_board_mux(MUX_TYPE_IFC);
+
 	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_board_mux(MUX_TYPE_IFC);
+	else if (strcmp(argv[1], "sdhc") == 0)
+		config_board_mux(MUX_TYPE_SDHC);
+	else
+		return CMD_RET_USAGE;
+	return 0;
+}
+
+U_BOOT_CMD(
+	mux, 2, 0, pin_mux_cmd,
+	"configure multiplexing pin for IFC/SDHC bus in runtime",
+	"bus_type (e.g. mux sdhc)"
+);