ENGR00315499-16 I2C: add I2C support on Sabre- board

- add I2C support on Sabresd ,Sabreauto board.
- add pfuze init code based on I2C transfer in Sabre* board file.

Signed-off-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>

2 files changed, 206 insertions, 1 deletions

diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
index eb289c4..5e277aa 100644
--- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c
+++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012-2014 Freescale Semiconductor, Inc.
  *
  * Author: Fabio Estevam <fabio.estevam@freescale.com>
  *
@@ -33,6 +33,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define I2C_EXP_RST IMX_GPIO_NR(1, 15)
+#define I2C3_STEER  IMX_GPIO_NR(5, 4)
 #define UART_PAD_CTRL  (PAD_CTL_PUS_100K_UP |			\
 	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm |			\
 	PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
@@ -157,6 +159,72 @@ iomux_v3_cfg_t const usdhc3_pads[] = {
 	MX6_PAD_NANDF_CS2__GPIO6_IO15   | MUX_PAD_CTRL(NO_PAD_CTRL),
 };
 
+#ifdef CONFIG_SYS_I2C_MXC
+static int setup_pmic_voltages(void)
+{
+	unsigned char value, rev_id = 0 ;
+	i2c_set_bus_num(1);
+	if (!i2c_probe(0x8)) {
+		if (i2c_read(0x8, 0, 1, &value, 1)) {
+			printf("Read device ID error!\n");
+			return -1;
+		}
+		if (i2c_read(0x8, 3, 1, &rev_id, 1)) {
+			printf("Read Rev ID error!\n");
+			return -1;
+		}
+		printf("Found PFUZE100! deviceid=%x,revid=%x\n", value, rev_id);
+		/* set SW1AB staby volatage 0.975V*/
+		if (i2c_read(0x8, 0x21, 1, &value, 1)) {
+			printf("Read SW1ABSTBY error!\n");
+			return -1;
+		}
+		value &= ~0x3f;
+		value |= 0x1b;
+		if (i2c_write(0x8, 0x21, 1, &value, 1)) {
+			printf("Set SW1ABSTBY error!\n");
+			return -1;
+		}
+		/* set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
+		if (i2c_read(0x8, 0x24, 1, &value, 1)) {
+			printf("Read SW1ABSTBY error!\n");
+			return -1;
+		}
+		value &= ~0xc0;
+		value |= 0x40;
+		if (i2c_write(0x8, 0x24, 1, &value, 1)) {
+			printf("Set SW1ABSTBY error!\n");
+			return -1;
+		}
+
+		/* set SW1C staby volatage 0.975V*/
+		if (i2c_read(0x8, 0x2f, 1, &value, 1)) {
+			printf("Read SW1CSTBY error!\n");
+			return -1;
+		}
+		value &= ~0x3f;
+		value |= 0x1b;
+		if (i2c_write(0x8, 0x2f, 1, &value, 1)) {
+			printf("Set SW1CSTBY error!\n");
+			return -1;
+		}
+
+		/* set SW1C/VDDSOC step ramp up time to from 16us to 4us/25mV */
+		if (i2c_read(0x8, 0x32, 1, &value, 1)) {
+			printf("Read SW1ABSTBY error!\n");
+			return -1;
+		}
+		value &= ~0xc0;
+		value |= 0x40;
+		if (i2c_write(0x8, 0x32, 1, &value, 1)) {
+			printf("Set SW1ABSTBY error!\n");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
 #ifdef CONFIG_LDO_BYPASS_CHECK
 void ldo_mode_set(int ldo_bypass)
 {
@@ -190,6 +258,7 @@ void ldo_mode_set(int ldo_bypass)
 	}
 }
 #endif
+#endif
 
 static void setup_iomux_uart(void)
 {
@@ -402,9 +471,19 @@ static const struct boot_mode board_boot_modes[] = {
 
 int board_late_init(void)
 {
+	int ret;
 #ifdef CONFIG_CMD_BMODE
 	add_board_boot_modes(board_boot_modes);
 #endif
+
+#ifdef CONFIG_SYS_I2C_MXC
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED,
+			CONFIG_SYS_I2C_SLAVE, &i2c_pad_info1);
+	ret = setup_pmic_voltages();
+	if (ret)
+		return -1;
+#endif
+
 #ifdef CONFIG_ENV_IS_IN_MMC
 	board_late_mmc_env_init();
 #endif
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index 5501db9..b368492 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -56,9 +56,31 @@ DECLARE_GLOBAL_DATA_PTR;
 #define SPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_SPEED_MED | \
 		      PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
 
+#define I2C_PAD_CTRL	(PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
+	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
+	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
+
 #define EPDC_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_SPEED_MED |	\
 	PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
 
+#ifdef CONFIG_SYS_I2C_MXC
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+/* I2C2 Camera, MIPI, pfuze */
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode = MX6_PAD_KEY_COL3__I2C2_SCL | PC,
+		.gpio_mode = MX6_PAD_KEY_COL3__GPIO4_IO12 | PC,
+		.gp = IMX_GPIO_NR(4, 12)
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_KEY_ROW3__I2C2_SDA | PC,
+		.gpio_mode = MX6_PAD_KEY_ROW3__GPIO4_IO13 | PC,
+		.gp = IMX_GPIO_NR(4, 13)
+	}
+};
+#endif
+
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -223,6 +245,100 @@ static void setup_iomux_uart(void)
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
 }
 
+#ifdef CONFIG_SYS_I2C_MXC
+static int setup_pmic_voltages(void)
+{
+	unsigned char value, rev_id = 0 ;
+
+	i2c_set_bus_num(1);
+	if (!i2c_probe(0x8)) {
+		if (i2c_read(0x8, 0, 1, &value, 1)) {
+			printf("Read device ID error!\n");
+			return -1;
+		}
+		if (i2c_read(0x8, 3, 1, &rev_id, 1)) {
+			printf("Read Rev ID error!\n");
+			return -1;
+		}
+		printf("Found PFUZE100! deviceid=%x,revid=%x\n", value, rev_id);
+		/*For camera streaks issue,swap VGEN5 and VGEN3 to power camera.
+		*sperate VDDHIGH_IN and camera 2.8V power supply, after switch:
+		*VGEN5 for VDDHIGH_IN and increase to 3V to align with datasheet
+		*VGEN3 for camera 2.8V power supply
+		*/
+		/*increase VGEN3 from 2.5 to 2.8V*/
+		if (i2c_read(0x8, 0x6e, 1, &value, 1)) {
+			printf("Read VGEN3 error!\n");
+			return -1;
+		}
+		value &= ~0xf;
+		value |= 0xa;
+		if (i2c_write(0x8, 0x6e, 1, &value, 1)) {
+			printf("Set VGEN3 error!\n");
+			return -1;
+		}
+		/*increase VGEN5 from 2.8 to 3V*/
+		if (i2c_read(0x8, 0x70, 1, &value, 1)) {
+			printf("Read VGEN5 error!\n");
+			return -1;
+		}
+		value &= ~0xf;
+		value |= 0xc;
+		if (i2c_write(0x8, 0x70, 1, &value, 1)) {
+			printf("Set VGEN5 error!\n");
+			return -1;
+		}
+		/* set SW1AB staby volatage 0.975V*/
+		if (i2c_read(0x8, 0x21, 1, &value, 1)) {
+			printf("Read SW1ABSTBY error!\n");
+			return -1;
+		}
+		value &= ~0x3f;
+		value |= 0x1b;
+		if (i2c_write(0x8, 0x21, 1, &value, 1)) {
+			printf("Set SW1ABSTBY error!\n");
+			return -1;
+		}
+		/* set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
+		if (i2c_read(0x8, 0x24, 1, &value, 1)) {
+			printf("Read SW1ABSTBY error!\n");
+			return -1;
+		}
+		value &= ~0xc0;
+		value |= 0x40;
+		if (i2c_write(0x8, 0x24, 1, &value, 1)) {
+			printf("Set SW1ABSTBY error!\n");
+			return -1;
+		}
+
+		/* set SW1C staby volatage 0.975V*/
+		if (i2c_read(0x8, 0x2f, 1, &value, 1)) {
+			printf("Read SW1CSTBY error!\n");
+			return -1;
+		}
+		value &= ~0x3f;
+		value |= 0x1b;
+		if (i2c_write(0x8, 0x2f, 1, &value, 1)) {
+			printf("Set SW1CSTBY error!\n");
+			return -1;
+		}
+
+		/* set SW1C/VDDSOC step ramp up time to from 16us to 4us/25mV */
+		if (i2c_read(0x8, 0x32, 1, &value, 1)) {
+			printf("Read SW1ABSTBY error!\n");
+			return -1;
+		}
+		value &= ~0xc0;
+		value |= 0x40;
+		if (i2c_write(0x8, 0x32, 1, &value, 1)) {
+			printf("Set SW1ABSTBY error!\n");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
 #ifdef CONFIG_LDO_BYPASS_CHECK
 void ldo_mode_set(int ldo_bypass)
 {
@@ -284,6 +400,7 @@ void ldo_mode_set(int ldo_bypass)
 	}
 }
 #endif
+#endif
 
 #ifdef CONFIG_FSL_ESDHC
 struct fsl_esdhc_cfg usdhc_cfg[3] = {
@@ -665,10 +782,19 @@ static const struct boot_mode board_boot_modes[] = {
 
 int board_late_init(void)
 {
+	int ret = 0;
 #ifdef CONFIG_CMD_BMODE
 	add_board_boot_modes(board_boot_modes);
 #endif
 
+#ifdef CONFIG_SYS_I2C_MXC
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED,
+			CONFIG_SYS_I2C_SLAVE, &i2c_pad_info1);
+	ret = setup_pmic_voltages();
+	if (ret)
+		return -1;
+#endif
+
 #ifdef CONFIG_ENV_IS_IN_MMC
 	board_late_mmc_env_init();
 #endif