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Diffstat (limited to 'board/freescale/mx53_loco/mx53_loco.c')
-rw-r--r--board/freescale/mx53_loco/mx53_loco.c116
1 files changed, 82 insertions, 34 deletions
diff --git a/board/freescale/mx53_loco/mx53_loco.c b/board/freescale/mx53_loco/mx53_loco.c
index fda52dc..4d25970 100644
--- a/board/freescale/mx53_loco/mx53_loco.c
+++ b/board/freescale/mx53_loco/mx53_loco.c
@@ -323,6 +323,18 @@ void setup_pmic_voltages(void)
{
}
+/* Note: udelay() is not accurate for i2c timing */
+static void __udelay(int time)
+{
+ int i, j;
+
+ for (i = 0; i < time; i++) {
+ for (j = 0; j < 200; j++) {
+ asm("nop");
+ asm("nop");
+ }
+ }
+}
/* DA9053 I2C SDA stuck low issue: the I2C block in DA9053 may not correctly
* receive a Power On Reset and device is in unknown state during start-up.
* The only way to get the chip into known state before any communication
@@ -337,9 +349,9 @@ void setup_pmic_voltages(void)
*/
#define I2C1_SDA_GPIO5_26_BIT_MASK (1 << 26)
#define I2C1_SCL_GPIO5_27_BIT_MASK (1 << 27)
-void i2c_failed_handle(void)
+int da9053_i2c_startup_reset(void)
{
- unsigned int reg, i, retry = 10;
+ unsigned int reg, i, retry = 3;
do {
/* set I2C1_SDA as GPIO input */
@@ -357,70 +369,106 @@ void i2c_failed_handle(void)
reg = readl(GPIO5_BASE_ADDR + 0x4);
reg |= I2C1_SCL_GPIO5_27_BIT_MASK;
writel(reg, GPIO5_BASE_ADDR + 0x4);
- udelay(10000);
+ __udelay(10000);
for (i = 0; i < 10; i++) {
reg = readl(GPIO5_BASE_ADDR + 0x0);
reg |= I2C1_SCL_GPIO5_27_BIT_MASK;
writel(reg, GPIO5_BASE_ADDR + 0x0);
- udelay(5000);
+ __udelay(4);
reg = readl(GPIO5_BASE_ADDR + 0x0);
reg &= ~I2C1_SCL_GPIO5_27_BIT_MASK;
writel(reg, GPIO5_BASE_ADDR + 0x0);
- udelay(5000);
+ __udelay(4);
}
reg = readl(GPIO5_BASE_ADDR + 0x0);
reg |= I2C1_SCL_GPIO5_27_BIT_MASK;
writel(reg, GPIO5_BASE_ADDR + 0x0);
- udelay(1000);
+ __udelay(20);
+
+ /* I2C1_SDA = output */
+ reg = readl(GPIO5_BASE_ADDR + 0x4);
+ reg |= I2C1_SDA_GPIO5_26_BIT_MASK;
+ writel(reg, GPIO5_BASE_ADDR + 0x4);
+
+ /* I2C1_SDA = H i2c start and stop bit */
+ reg = readl(GPIO5_BASE_ADDR + 0x0);
+ reg |= I2C1_SDA_GPIO5_26_BIT_MASK;
+ writel(reg, GPIO5_BASE_ADDR + 0x0);
+ __udelay(4);
+ /* I2C1_SDA = L */
+ reg = readl(GPIO5_BASE_ADDR + 0x0);
+ reg &= ~I2C1_SDA_GPIO5_26_BIT_MASK;
+ writel(reg, GPIO5_BASE_ADDR + 0x0);
+ __udelay(4);
+ /* I2C1_SCL = L */
+ reg = readl(GPIO5_BASE_ADDR + 0x0);
+ reg &= ~I2C1_SCL_GPIO5_27_BIT_MASK;
+ writel(reg, GPIO5_BASE_ADDR + 0x0);
+ __udelay(4);
+ /* I2C1_SCL = H */
+ reg = readl(GPIO5_BASE_ADDR + 0x0);
+ reg |= I2C1_SCL_GPIO5_27_BIT_MASK;
+ writel(reg, GPIO5_BASE_ADDR + 0x0);
+ __udelay(4);
+ /* I2C1_SDA = H */
+ reg = readl(GPIO5_BASE_ADDR + 0x0);
+ reg |= I2C1_SDA_GPIO5_26_BIT_MASK;
+ writel(reg, GPIO5_BASE_ADDR + 0x0);
+ __udelay(4);
+
+ /* I2C1_SDA = input */
+ reg = readl(GPIO5_BASE_ADDR + 0x4);
+ reg &= ~I2C1_SDA_GPIO5_26_BIT_MASK;
+ writel(reg, GPIO5_BASE_ADDR + 0x4);
reg = readl(GPIO5_BASE_ADDR + 0x8);
if (reg & I2C1_SDA_GPIO5_26_BIT_MASK) {
printf("***I2C1_SDA = hight***\n");
- return;
- } else {
+ break;
+ } else
printf("***I2C1_SDA = low***\n");
- }
} while (retry--);
+ /* restore I2C1_SDA/I2C1_SCL iomux */
+ mxc_request_iomux(MX53_PIN_CSI0_D8,
+ IOMUX_CONFIG_ALT5 | IOMUX_CONFIG_SION);
+ mxc_request_iomux(MX53_PIN_CSI0_D9,
+ IOMUX_CONFIG_ALT5 | IOMUX_CONFIG_SION);
+ return 0;
}
-
-int i2c_read_check(uchar chip, uint addr, int alen, uchar *buf, int len)
+#define DA9053_DUMMY_WRITE_REG (0xff)
+int i2c_read_da9053(uchar chip, uint addr, int alen, uchar *buf, int len)
{
int ret = 0;
+ uchar dummy = 0xff;
ret = i2c_read(chip, addr, alen, buf, len);
if (ret == 0) {
+ ret = i2c_write(chip, DA9053_DUMMY_WRITE_REG, 1, &dummy, 1);
+ if (0 != ret)
+ printf("[I2C-Rd-DA9053]dummy write reg fail\n");
return 0;
} else {
- i2c_failed_handle();
- setup_i2c(CONFIG_SYS_I2C_PORT);
- ret = i2c_read(chip, addr, alen, buf, len);
- if (ret != 0) {
printf("[I2C-DA9053]read i2c fail\n");
return -1;
}
- return 0;
- }
}
-int i2c_write_check(uchar chip, uint addr, int alen, uchar *buf, int len)
+int i2c_write_da9053(uchar chip, uint addr, int alen, uchar *buf, int len)
{
int ret = 0;
+ uchar dummy = 0xff;
ret = i2c_write(chip, addr, alen, buf, len);
if (ret == 0) {
+ ret = i2c_write(chip, DA9053_DUMMY_WRITE_REG, 1, &dummy, 1);
+ if (0 != ret)
+ printf("[I2C-Wr-DA9053]dummy write reg fail\n");
return 0;
} else {
- i2c_failed_handle();
- setup_i2c(CONFIG_SYS_I2C_PORT);
- i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
- ret = i2c_write(chip, addr, alen, buf, len);
- if (ret != 0) {
- printf("[I2C-DA9053]write i2c fail\n");
- return -1;
- }
- return 0;
+ printf("[I2C-DA9053]write i2c fail\n");
+ return -1;
}
}
#endif
@@ -860,26 +908,26 @@ int board_late_init(void)
setup_board_rev(get_board_rev_from_fuse());
/* Switch to 1GHZ */
clk_config(CONFIG_REF_CLK_FREQ, 1000, CPU_CLK);
- } else if (!i2c_probe(0x48)) {
+ } else if (!da9053_i2c_startup_reset() && !i2c_probe(0x48)) {
/* increase VDDGP as 1.25V for 1GHZ */
value = 0x5e;
do {
- if (0 != i2c_write_check(0x48, 0x2e, 1, &value, 1)) {
+ if (0 != i2c_write_da9053(0x48, 0x2e, 1, &value, 1)) {
printf("da9052_i2c_is_connected - i2c write failed.....\n");
} else {
printf("da9052_i2c_is_connected - i2c write success....\n");
ret = 0;
}
} while (ret != 0 && retries--);
- i2c_read(0x48, 60, 1, &value, 1);
+ i2c_read_da9053(0x48, 60, 1, &value, 1);
value |= 0x1;
- i2c_write(0x48, 60, 1, &value, 1);
+ i2c_write_da9053(0x48, 60, 1, &value, 1);
/* restore VUSB_2V5 when reset from suspend state */
value = BUCKPERI_RESTORE_SW_STEP;
- i2c_write(0x48, DA9052_ID1213_REG, 1, &value, 1);
- i2c_read(0x48, DA9052_SUPPLY_REG, 1, &value, 1);
+ i2c_write_da9053(0x48, DA9052_ID1213_REG, 1, &value, 1);
+ i2c_read_da9053(0x48, DA9052_SUPPLY_REG, 1, &value, 1);
value |= SUPPLY_RESTORE_VPERISW_EN;
- i2c_write(0x48, DA9052_SUPPLY_REG, 1, &value, 1);
+ i2c_write_da9053(0x48, DA9052_SUPPLY_REG, 1, &value, 1);
/* set up rev #0 for loco/da9053 board */
setup_board_rev(0);
generated by cgit v1.1 at 2024-12-21 07:31:05 +0000