msm: board_msm7x27a: Switch wcn2243 PCM/I2S pins btw High-Z and Normal.
The PCM GPIOs on msm are multiplexed btw I2S and PCM modes, to support
FM on msm7x27a. The wcn2243 pins are also required to switched btw
high-z and normal modes to keep only one of FM/BTSCO active at a time.
CRs-Fixed: 323160
Change-Id: Ic36552f086f4cfed611ad322ca740a501902dff1
Signed-off-by: Srinivas Krovvidi <skrovvid@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-msm7x27a.c b/arch/arm/mach-msm/board-msm7x27a.c
index 5de5ea3..e7bd486 100644
--- a/arch/arm/mach-msm/board-msm7x27a.c
+++ b/arch/arm/mach-msm/board-msm7x27a.c
@@ -61,6 +61,15 @@
#define BAHAMA_SLAVE_ID_QMEMBIST_ADDR 0x7B
#define BAHAMA_SLAVE_ID_FM_REG 0x02
#define FM_GPIO 83
+#define BT_PCM_BCLK_MODE 0x88
+#define BT_PCM_DIN_MODE 0x89
+#define BT_PCM_DOUT_MODE 0x8A
+#define BT_PCM_SYNC_MODE 0x8B
+#define FM_I2S_SD_MODE 0x8E
+#define FM_I2S_WS_MODE 0x8F
+#define FM_I2S_SCK_MODE 0x90
+#define I2C_PIN_CTL 0x15
+#define I2C_NORMAL 0x40
enum {
GPIO_EXPANDER_IRQ_BASE = NR_MSM_IRQS + NR_GPIO_IRQS,
@@ -125,6 +134,57 @@
/* FM Platform power and shutdown routines */
#define FPGA_MSM_CNTRL_REG2 0x90008010
+static int switch_pcm_i2s_reg_mode(int mode)
+{
+ unsigned char reg = 0;
+ int rc = -1;
+ unsigned char set = I2C_PIN_CTL; /*SET PIN CTL mode*/
+ unsigned char unset = I2C_NORMAL; /* UNSET PIN CTL MODE*/
+ struct marimba config = { .mod_id = SLAVE_ID_BAHAMA};
+
+ if (mode == 0) {
+ /* as we need to switch path to FM we need to move
+ BT AUX PCM lines to PIN CONTROL mode then move
+ FM to normal mode.*/
+ for (reg = BT_PCM_BCLK_MODE; reg <= BT_PCM_SYNC_MODE; reg++) {
+ rc = marimba_write(&config, reg, &set, 1);
+ if (rc < 0) {
+ pr_err("pcm pinctl failed = %d", rc);
+ goto err_all;
+ }
+ }
+ for (reg = FM_I2S_SD_MODE; reg <= FM_I2S_SCK_MODE; reg++) {
+ rc = marimba_write(&config, reg, &unset, 1);
+ if (rc < 0) {
+ pr_err("i2s normal failed = %d", rc);
+ goto err_all;
+ }
+ }
+ } else {
+ /* as we need to switch path to AUXPCM we need to move
+ FM I2S lines to PIN CONTROL mode then move
+ BT AUX_PCM to normal mode.*/
+ for (reg = FM_I2S_SD_MODE; reg <= FM_I2S_SCK_MODE; reg++) {
+ rc = marimba_write(&config, reg, &set, 1);
+ if (rc < 0) {
+ pr_err("i2s pinctl failed = %d", rc);
+ goto err_all;
+ }
+ }
+ for (reg = BT_PCM_BCLK_MODE; reg <= BT_PCM_SYNC_MODE; reg++) {
+ rc = marimba_write(&config, reg, &unset, 1);
+ if (rc < 0) {
+ pr_err("pcm normal failed = %d", rc);
+ goto err_all;
+ }
+ }
+ }
+
+ return 0;
+
+err_all:
+ return rc;
+}
static void config_pcm_i2s_mode(int mode)
{
@@ -220,6 +280,12 @@
if (machine_is_msm7x27a_surf() || machine_is_msm7625a_surf())
config_pcm_i2s_mode(0);
pr_err("%s mode = FM_I2S_ON", __func__);
+
+ rc = switch_pcm_i2s_reg_mode(0);
+ if (rc) {
+ pr_err("switch mode failed");
+ return rc;
+ }
for (pin = 0; pin < ARRAY_SIZE(fm_i2s_config_power_on);
pin++) {
rc = gpio_tlmm_config(
@@ -231,6 +297,11 @@
}
} else if (mode == FM_I2S_OFF) {
pr_err("%s mode = FM_I2S_OFF", __func__);
+ rc = switch_pcm_i2s_reg_mode(1);
+ if (rc) {
+ pr_err("switch mode failed");
+ return rc;
+ }
for (pin = 0; pin < ARRAY_SIZE(fm_i2s_config_power_off);
pin++) {
rc = gpio_tlmm_config(
@@ -251,6 +322,11 @@
if (machine_is_msm7x27a_surf() || machine_is_msm7625a_surf())
config_pcm_i2s_mode(1);
pr_err("%s mode =BT_PCM_ON", __func__);
+ rc = switch_pcm_i2s_reg_mode(1);
+ if (rc) {
+ pr_err("switch mode failed");
+ return rc;
+ }
for (pin = 0; pin < ARRAY_SIZE(bt_config_pcm_on);
pin++) {
rc = gpio_tlmm_config(bt_config_pcm_on[pin],
@@ -260,6 +336,11 @@
}
} else if (mode == BT_PCM_OFF) {
pr_err("%s mode =BT_PCM_OFF", __func__);
+ rc = switch_pcm_i2s_reg_mode(0);
+ if (rc) {
+ pr_err("switch mode failed");
+ return rc;
+ }
for (pin = 0; pin < ARRAY_SIZE(bt_config_pcm_off);
pin++) {
rc = gpio_tlmm_config(bt_config_pcm_off[pin],