msm: board-msm7627a-wlan: Add AR600X power-up sequence.
Add AR600X power-up sequence with msm devices like FFA7627a,
QRD7627a and QRD8625.
Change-Id: I64232ac4bfd77143f6df5b0929698efe3f2c011a
Signed-off-by: Santosh Sajjan <ssajjan@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-msm7627a-wlan.c b/arch/arm/mach-msm/board-msm7627a-wlan.c
new file mode 100644
index 0000000..6df7626
--- /dev/null
+++ b/arch/arm/mach-msm/board-msm7627a-wlan.c
@@ -0,0 +1,368 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <asm/mach-types.h>
+#include <mach/rpc_pmapp.h>
+#include "board-msm7627a.h"
+#include "devices-msm7x2xa.h"
+#include "timer.h"
+
+#define GPIO_WLAN_3V3_EN 119
+static const char *id = "WLAN";
+
+enum {
+ WLAN_VREG_S3 = 0,
+ WLAN_VREG_L17,
+ WLAN_VREG_L19
+};
+
+struct wlan_vreg_info {
+ const char *vreg_id;
+ unsigned int level_min;
+ unsigned int level_max;
+ unsigned int pmapp_id;
+ unsigned int is_vreg_pin_controlled;
+ struct regulator *reg;
+};
+
+static struct wlan_vreg_info vreg_info[] = {
+ {"msme1", 1800000, 1800000, 2, 0, NULL},
+ {"bt", 3300000, 3300000, 21, 1, NULL},
+ {"wlan4", 1800000, 1800000, 23, 1, NULL}
+};
+
+int gpio_wlan_sys_rest_en = 134;
+static void gpio_wlan_config(void)
+{
+ if (machine_is_msm7627a_qrd1() || machine_is_msm7627a_evb())
+ gpio_wlan_sys_rest_en = 124;
+}
+
+static unsigned int qrf6285_init_regs(void)
+{
+ struct regulator_bulk_data regs[ARRAY_SIZE(vreg_info)];
+ int i = 0, rc = 0;
+
+ for (i = 0; i < ARRAY_SIZE(regs); i++) {
+ regs[i].supply = vreg_info[i].vreg_id;
+ regs[i].min_uV = vreg_info[i].level_min;
+ regs[i].max_uV = vreg_info[i].level_max;
+ }
+
+ rc = regulator_bulk_get(NULL, ARRAY_SIZE(regs), regs);
+ if (rc) {
+ pr_err("%s: could not get regulators: %d\n", __func__, rc);
+ goto out;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(regs); i++)
+ vreg_info[i].reg = regs[i].consumer;
+
+out:
+ return rc;
+}
+
+static unsigned int setup_wlan_gpio(bool on)
+{
+ int rc = 0;
+
+ if (on) {
+ rc = gpio_direction_output(gpio_wlan_sys_rest_en, 1);
+ msleep(100);
+ } else {
+ gpio_set_value_cansleep(gpio_wlan_sys_rest_en, 0);
+ rc = gpio_direction_input(gpio_wlan_sys_rest_en);
+ msleep(100);
+ }
+
+ if (rc)
+ pr_err("%s: WLAN sys_reset_en GPIO: Error", __func__);
+
+ return rc;
+}
+
+static unsigned int setup_wlan_clock(bool on)
+{
+ int rc = 0;
+
+ if (on) {
+ /* Vote for A0 clock */
+ rc = pmapp_clock_vote(id, PMAPP_CLOCK_ID_A0,
+ PMAPP_CLOCK_VOTE_ON);
+ } else {
+ /* Vote against A0 clock */
+ rc = pmapp_clock_vote(id, PMAPP_CLOCK_ID_A0,
+ PMAPP_CLOCK_VOTE_OFF);
+ }
+
+ if (rc)
+ pr_err("%s: Configuring A0 clock for WLAN: Error", __func__);
+
+ return rc;
+}
+
+static unsigned int wlan_switch_regulators(int on)
+{
+ int rc = 0, index = 0;
+
+ if (machine_is_msm7627a_qrd1())
+ index = 2;
+
+ for ( ; index < ARRAY_SIZE(vreg_info); index++) {
+ if (on) {
+ rc = regulator_set_voltage(vreg_info[index].reg,
+ vreg_info[index].level_min,
+ vreg_info[index].level_max);
+ if (rc) {
+ pr_err("%s:%s set voltage failed %d\n",
+ __func__, vreg_info[index].vreg_id, rc);
+ goto reg_disable;
+ }
+
+ rc = regulator_enable(vreg_info[index].reg);
+ if (rc) {
+ pr_err("%s:%s vreg enable failed %d\n",
+ __func__, vreg_info[index].vreg_id, rc);
+ goto reg_disable;
+ }
+
+ if (vreg_info[index].is_vreg_pin_controlled) {
+ rc = pmapp_vreg_lpm_pincntrl_vote(id,
+ vreg_info[index].pmapp_id,
+ PMAPP_CLOCK_ID_A0, 1);
+ if (rc) {
+ pr_err("%s:%s pincntrl failed %d\n",
+ __func__,
+ vreg_info[index].vreg_id, rc);
+ goto pin_cnt_fail;
+ }
+ }
+ } else {
+ if (vreg_info[index].is_vreg_pin_controlled) {
+ rc = pmapp_vreg_lpm_pincntrl_vote(id,
+ vreg_info[index].pmapp_id,
+ PMAPP_CLOCK_ID_A0, 0);
+ if (rc) {
+ pr_err("%s:%s pincntrl failed %d\n",
+ __func__,
+ vreg_info[index].vreg_id, rc);
+ goto pin_cnt_fail;
+ }
+ }
+
+ rc = regulator_disable(vreg_info[index].reg);
+ if (rc) {
+ pr_err("%s:%s vreg disable failed %d\n",
+ __func__,
+ vreg_info[index].vreg_id, rc);
+ goto reg_disable;
+ }
+ }
+ }
+ return 0;
+pin_cnt_fail:
+ if (on)
+ regulator_disable(vreg_info[index].reg);
+reg_disable:
+ if (!machine_is_msm7627a_qrd1()) {
+ while (index) {
+ if (on) {
+ index--;
+ regulator_disable(vreg_info[index].reg);
+ regulator_put(vreg_info[index].reg);
+ }
+ }
+ }
+ return rc;
+}
+
+static unsigned int msm_AR600X_setup_power(bool on)
+{
+ int rc = 0;
+ static bool init_done;
+
+ if (unlikely(!init_done)) {
+ gpio_wlan_config();
+ rc = qrf6285_init_regs();
+ if (rc) {
+ pr_err("%s: qrf6285 init failed = %d\n", __func__, rc);
+ return rc;
+ } else {
+ init_done = true;
+ }
+ }
+
+ rc = wlan_switch_regulators(on);
+ if (rc) {
+ pr_err("%s: wlan_switch_regulators error = %d\n", __func__, rc);
+ goto out;
+ }
+
+ /* GPIO_WLAN_3V3_EN is only required for the QRD7627a */
+ if (machine_is_msm7627a_qrd1()) {
+ rc = gpio_tlmm_config(GPIO_CFG(GPIO_WLAN_3V3_EN, 0,
+ GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
+ GPIO_CFG_2MA), GPIO_CFG_ENABLE);
+ if (rc) {
+ pr_err("%s gpio_tlmm_config 119 failed,error = %d\n",
+ __func__, rc);
+ goto reg_disable;
+ }
+ gpio_set_value(GPIO_WLAN_3V3_EN, 1);
+ }
+
+ /*
+ * gpio_wlan_sys_rest_en is not from the GPIO expander for QRD7627a,
+ * EVB1.0 and QRD8625,so the below step is required for those devices.
+ */
+ if (machine_is_msm7627a_qrd1() || machine_is_msm7627a_evb()) {
+ rc = gpio_tlmm_config(GPIO_CFG(gpio_wlan_sys_rest_en, 0,
+ GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
+ GPIO_CFG_2MA), GPIO_CFG_ENABLE);
+ if (rc) {
+ pr_err("%s gpio_tlmm_config 119 failed,error = %d\n",
+ __func__, rc);
+ goto qrd_gpio_fail;
+ }
+ gpio_set_value(gpio_wlan_sys_rest_en, 1);
+ } else {
+ rc = gpio_request(gpio_wlan_sys_rest_en, "WLAN_DEEP_SLEEP_N");
+ if (rc) {
+ pr_err("%s: WLAN sys_rest_en GPIO %d request failed %d\n",
+ __func__,
+ gpio_wlan_sys_rest_en, rc);
+ goto qrd_gpio_fail;
+ }
+ rc = setup_wlan_gpio(on);
+ if (rc) {
+ pr_err("%s: wlan_set_gpio = %d\n", __func__, rc);
+ goto gpio_fail;
+ }
+ }
+
+ /* Enable the A0 clock */
+ rc = setup_wlan_clock(on);
+ if (rc) {
+ pr_err("%s: setup_wlan_clock = %d\n", __func__, rc);
+ goto set_gpio_fail;
+ }
+
+ /* Configure A0 clock to be slave to WLAN_CLK_PWR_REQ */
+ rc = pmapp_clock_vote(id, PMAPP_CLOCK_ID_A0,
+ PMAPP_CLOCK_VOTE_PIN_CTRL);
+ if (rc) {
+ pr_err("%s: Configuring A0 to Pin controllable failed %d\n",
+ __func__, rc);
+ goto set_clock_fail;
+ }
+
+ pr_info("WLAN power-up success\n");
+ return 0;
+set_clock_fail:
+ setup_wlan_clock(0);
+set_gpio_fail:
+ setup_wlan_gpio(0);
+gpio_fail:
+ gpio_free(gpio_wlan_sys_rest_en);
+qrd_gpio_fail:
+ gpio_free(GPIO_WLAN_3V3_EN);
+reg_disable:
+ wlan_switch_regulators(0);
+out:
+ pr_info("WLAN power-up failed\n");
+ return rc;
+}
+
+static unsigned int msm_AR600X_shutdown_power(bool on)
+{
+ int rc = 0;
+
+ /* Disable the A0 clock */
+ rc = setup_wlan_clock(on);
+ if (rc) {
+ pr_err("%s: setup_wlan_clock = %d\n", __func__, rc);
+ goto set_clock_fail;
+ }
+
+ /*
+ * gpio_wlan_sys_rest_en is not from the GPIO expander for QRD7627a,
+ * EVB1.0 and QRD8625,so the below step is required for those devices.
+ */
+ if (machine_is_msm7627a_qrd1() || machine_is_msm7627a_evb()) {
+ rc = gpio_tlmm_config(GPIO_CFG(gpio_wlan_sys_rest_en, 0,
+ GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
+ GPIO_CFG_2MA), GPIO_CFG_ENABLE);
+ if (rc) {
+ pr_err("%s gpio_tlmm_config 119 failed,error = %d\n",
+ __func__, rc);
+ goto gpio_fail;
+ }
+ gpio_set_value(gpio_wlan_sys_rest_en, 0);
+ } else {
+ rc = setup_wlan_gpio(on);
+ if (rc) {
+ pr_err("%s: wlan_set_gpio = %d\n", __func__, rc);
+ goto set_gpio_fail;
+ }
+ gpio_free(gpio_wlan_sys_rest_en);
+ }
+
+ /* GPIO_WLAN_3V3_EN is only required for the QRD7627a */
+ if (machine_is_msm7627a_qrd1()) {
+ rc = gpio_tlmm_config(GPIO_CFG(GPIO_WLAN_3V3_EN, 0,
+ GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
+ GPIO_CFG_2MA), GPIO_CFG_ENABLE);
+ if (rc) {
+ pr_err("%s gpio_tlmm_config 119 failed,error = %d\n",
+ __func__, rc);
+ goto qrd_gpio_fail;
+ }
+ gpio_set_value(GPIO_WLAN_3V3_EN, 0);
+ }
+
+ rc = wlan_switch_regulators(on);
+ if (rc) {
+ pr_err("%s: wlan_switch_regulators error = %d\n",
+ __func__, rc);
+ goto reg_disable;
+ }
+
+ pr_info("WLAN power-down success\n");
+ return 0;
+set_clock_fail:
+ setup_wlan_clock(0);
+set_gpio_fail:
+ setup_wlan_gpio(0);
+gpio_fail:
+ gpio_free(gpio_wlan_sys_rest_en);
+qrd_gpio_fail:
+ gpio_free(GPIO_WLAN_3V3_EN);
+reg_disable:
+ wlan_switch_regulators(0);
+ pr_info("WLAN power-down failed\n");
+ return rc;
+}
+
+int ar600x_wlan_power(bool on)
+{
+ if (on)
+ msm_AR600X_setup_power(on);
+ else
+ msm_AR600X_shutdown_power(on);
+
+ return 0;
+}