blob: 6062fb8fdcdea37c49ae67a6d5381e251a0d4fec [file] [log] [blame]
/* Copyright (c) 2016-2017, The Linux Foundation. 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/kernel.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/mfd/core.h>
#include <linux/mfd/wcd9xxx/pdata.h>
#include <linux/mfd/wcd9xxx/core.h>
#include <linux/mfd/wcd9xxx/wcd9xxx-irq.h>
#include <linux/mfd/msm-cdc-supply.h>
#include <linux/mfd/msm-cdc-pinctrl.h>
#include <linux/mfd/wcd9xxx/wcd9xxx-utils.h>
#define REG_BYTES 2
#define VAL_BYTES 1
/*
* Page Register Address that APP Proc uses to
* access WCD9335 Codec registers is identified
* as 0x00
*/
#define PAGE_REG_ADDR 0x00
static enum wcd9xxx_intf_status wcd9xxx_intf = -1;
static struct mfd_cell tavil_devs[] = {
{
.name = "qcom-wcd-pinctrl",
.of_compatible = "qcom,wcd-pinctrl",
},
{
.name = "tavil_codec",
},
};
static struct mfd_cell tasha_devs[] = {
{
.name = "tasha_codec",
},
};
static struct mfd_cell tomtom_devs[] = {
{
.name = "tomtom_codec",
},
};
static int wcd9xxx_read_of_property_u32(struct device *dev, const char *name,
u32 *val)
{
int rc = 0;
rc = of_property_read_u32(dev->of_node, name, val);
if (rc)
dev_err(dev, "%s: Looking up %s property in node %s failed",
__func__, name, dev->of_node->full_name);
return rc;
}
static void wcd9xxx_dt_parse_micbias_info(struct device *dev,
struct wcd9xxx_micbias_setting *mb)
{
u32 prop_val;
int rc;
if (of_find_property(dev->of_node, "qcom,cdc-micbias-ldoh-v", NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias-ldoh-v",
&prop_val);
if (!rc)
mb->ldoh_v = (u8)prop_val;
}
/* MB1 */
if (of_find_property(dev->of_node, "qcom,cdc-micbias-cfilt1-mv",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias-cfilt1-mv",
&prop_val);
if (!rc)
mb->cfilt1_mv = prop_val;
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias1-cfilt-sel",
&prop_val);
if (!rc)
mb->bias1_cfilt_sel = (u8)prop_val;
} else if (of_find_property(dev->of_node, "qcom,cdc-micbias1-mv",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias1-mv",
&prop_val);
if (!rc)
mb->micb1_mv = prop_val;
} else {
dev_info(dev, "%s: Micbias1 DT property not found\n",
__func__);
}
/* MB2 */
if (of_find_property(dev->of_node, "qcom,cdc-micbias-cfilt2-mv",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias-cfilt2-mv",
&prop_val);
if (!rc)
mb->cfilt2_mv = prop_val;
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias2-cfilt-sel",
&prop_val);
if (!rc)
mb->bias2_cfilt_sel = (u8)prop_val;
} else if (of_find_property(dev->of_node, "qcom,cdc-micbias2-mv",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias2-mv",
&prop_val);
if (!rc)
mb->micb2_mv = prop_val;
} else {
dev_info(dev, "%s: Micbias2 DT property not found\n",
__func__);
}
/* MB3 */
if (of_find_property(dev->of_node, "qcom,cdc-micbias-cfilt3-mv",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias-cfilt3-mv",
&prop_val);
if (!rc)
mb->cfilt3_mv = prop_val;
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias3-cfilt-sel",
&prop_val);
if (!rc)
mb->bias3_cfilt_sel = (u8)prop_val;
} else if (of_find_property(dev->of_node, "qcom,cdc-micbias3-mv",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias3-mv",
&prop_val);
if (!rc)
mb->micb3_mv = prop_val;
} else {
dev_info(dev, "%s: Micbias3 DT property not found\n",
__func__);
}
/* MB4 */
if (of_find_property(dev->of_node, "qcom,cdc-micbias4-cfilt-sel",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias4-cfilt-sel",
&prop_val);
if (!rc)
mb->bias4_cfilt_sel = (u8)prop_val;
} else if (of_find_property(dev->of_node, "qcom,cdc-micbias4-mv",
NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-micbias4-mv",
&prop_val);
if (!rc)
mb->micb4_mv = prop_val;
} else {
dev_info(dev, "%s: Micbias4 DT property not found\n",
__func__);
}
mb->bias1_cap_mode =
(of_property_read_bool(dev->of_node, "qcom,cdc-micbias1-ext-cap") ?
MICBIAS_EXT_BYP_CAP : MICBIAS_NO_EXT_BYP_CAP);
mb->bias2_cap_mode =
(of_property_read_bool(dev->of_node, "qcom,cdc-micbias2-ext-cap") ?
MICBIAS_EXT_BYP_CAP : MICBIAS_NO_EXT_BYP_CAP);
mb->bias3_cap_mode =
(of_property_read_bool(dev->of_node, "qcom,cdc-micbias3-ext-cap") ?
MICBIAS_EXT_BYP_CAP : MICBIAS_NO_EXT_BYP_CAP);
mb->bias4_cap_mode =
(of_property_read_bool(dev->of_node, "qcom,cdc-micbias4-ext-cap") ?
MICBIAS_EXT_BYP_CAP : MICBIAS_NO_EXT_BYP_CAP);
mb->bias2_is_headset_only =
of_property_read_bool(dev->of_node,
"qcom,cdc-micbias2-headset-only");
/* Print micbias info */
dev_dbg(dev, "%s: ldoh_v %u cfilt1_mv %u cfilt2_mv %u cfilt3_mv %u",
__func__, (u32)mb->ldoh_v, (u32)mb->cfilt1_mv,
(u32)mb->cfilt2_mv, (u32)mb->cfilt3_mv);
dev_dbg(dev, "%s: micb1_mv %u micb2_mv %u micb3_mv %u micb4_mv %u",
__func__, mb->micb1_mv, mb->micb2_mv,
mb->micb3_mv, mb->micb4_mv);
dev_dbg(dev, "%s: bias1_cfilt_sel %u bias2_cfilt_sel %u\n",
__func__, (u32)mb->bias1_cfilt_sel, (u32)mb->bias2_cfilt_sel);
dev_dbg(dev, "%s: bias3_cfilt_sel %u bias4_cfilt_sel %u\n",
__func__, (u32)mb->bias3_cfilt_sel, (u32)mb->bias4_cfilt_sel);
dev_dbg(dev, "%s: bias1_ext_cap %d bias2_ext_cap %d\n",
__func__, mb->bias1_cap_mode, mb->bias2_cap_mode);
dev_dbg(dev, "%s: bias3_ext_cap %d bias4_ext_cap %d\n",
__func__, mb->bias3_cap_mode, mb->bias4_cap_mode);
dev_dbg(dev, "%s: bias2_is_headset_only %d\n",
__func__, mb->bias2_is_headset_only);
}
/*
* wcd9xxx_validate_dmic_sample_rate:
* Given the dmic_sample_rate and mclk rate, validate the
* dmic_sample_rate. If dmic rate is found to be invalid,
* assign the dmic rate as undefined, so individual codec
* drivers can use their own defaults
* @dev: the device for which the dmic is to be configured
* @dmic_sample_rate: The input dmic_sample_rate
* @mclk_rate: The input codec mclk rate
* @dmic_rate_type: String to indicate the type of dmic sample
* rate, used for debug/error logging.
*/
static u32 wcd9xxx_validate_dmic_sample_rate(struct device *dev,
u32 dmic_sample_rate, u32 mclk_rate,
const char *dmic_rate_type)
{
u32 div_factor;
if (dmic_sample_rate == WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED ||
mclk_rate % dmic_sample_rate != 0)
goto undefined_rate;
div_factor = mclk_rate / dmic_sample_rate;
switch (div_factor) {
case 2:
case 3:
case 4:
case 8:
case 16:
/* Valid dmic DIV factors */
dev_dbg(dev, "%s: DMIC_DIV = %u, mclk_rate = %u\n",
__func__, div_factor, mclk_rate);
break;
case 6:
/*
* DIV 6 is valid for both 9.6MHz and 12.288MHz
* MCLK on Tavil. Older codecs support DIV6 only
* for 12.288MHz MCLK.
*/
if ((mclk_rate == WCD9XXX_MCLK_CLK_9P6HZ) &&
(of_device_is_compatible(dev->of_node,
"qcom,tavil-slim-pgd")))
dev_dbg(dev, "%s: DMIC_DIV = %u, mclk_rate = %u\n",
__func__, div_factor, mclk_rate);
else if (mclk_rate != WCD9XXX_MCLK_CLK_12P288MHZ)
goto undefined_rate;
break;
default:
/* Any other DIV factor is invalid */
goto undefined_rate;
}
return dmic_sample_rate;
undefined_rate:
dev_info(dev, "%s: Invalid %s = %d, for mclk %d\n",
__func__, dmic_rate_type, dmic_sample_rate, mclk_rate);
dmic_sample_rate = WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED;
return dmic_sample_rate;
}
/*
* wcd9xxx_populate_dt_data:
* Parse device tree properties for the given codec device
*
* @dev: pointer to codec device
*
* Returns pointer to the platform data resulting from parsing
* device tree.
*/
struct wcd9xxx_pdata *wcd9xxx_populate_dt_data(struct device *dev)
{
struct wcd9xxx_pdata *pdata;
u32 dmic_sample_rate = WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED;
u32 mad_dmic_sample_rate = WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED;
u32 ecpp_dmic_sample_rate = WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED;
u32 dmic_clk_drive = WCD9XXX_DMIC_CLK_DRIVE_UNDEFINED;
u32 prop_val;
int rc = 0;
if (!dev || !dev->of_node)
return NULL;
pdata = devm_kzalloc(dev, sizeof(struct wcd9xxx_pdata),
GFP_KERNEL);
if (!pdata)
return NULL;
/* Parse power supplies */
msm_cdc_get_power_supplies(dev, &pdata->regulator,
&pdata->num_supplies);
if (!pdata->regulator || (pdata->num_supplies <= 0)) {
dev_err(dev, "%s: no power supplies defined for codec\n",
__func__);
goto err_power_sup;
}
/* Parse micbias info */
wcd9xxx_dt_parse_micbias_info(dev, &pdata->micbias);
pdata->wcd_rst_np = of_parse_phandle(dev->of_node,
"qcom,wcd-rst-gpio-node", 0);
if (!pdata->wcd_rst_np) {
dev_err(dev, "%s: Looking up %s property in node %s failed\n",
__func__, "qcom,wcd-rst-gpio-node",
dev->of_node->full_name);
goto err_parse_dt_prop;
}
if (!(wcd9xxx_read_of_property_u32(dev, "qcom,cdc-mclk-clk-rate",
&prop_val)))
pdata->mclk_rate = prop_val;
if (pdata->mclk_rate != WCD9XXX_MCLK_CLK_9P6HZ &&
pdata->mclk_rate != WCD9XXX_MCLK_CLK_12P288MHZ) {
dev_err(dev, "%s: Invalid mclk_rate = %u\n", __func__,
pdata->mclk_rate);
goto err_parse_dt_prop;
}
if (!(wcd9xxx_read_of_property_u32(dev, "qcom,cdc-dmic-sample-rate",
&prop_val)))
dmic_sample_rate = prop_val;
pdata->dmic_sample_rate = wcd9xxx_validate_dmic_sample_rate(dev,
dmic_sample_rate,
pdata->mclk_rate,
"audio_dmic_rate");
if (!(wcd9xxx_read_of_property_u32(dev, "qcom,cdc-mad-dmic-rate",
&prop_val)))
mad_dmic_sample_rate = prop_val;
pdata->mad_dmic_sample_rate = wcd9xxx_validate_dmic_sample_rate(dev,
mad_dmic_sample_rate,
pdata->mclk_rate,
"mad_dmic_rate");
if (of_find_property(dev->of_node, "qcom,cdc-ecpp-dmic-rate", NULL)) {
rc = wcd9xxx_read_of_property_u32(dev,
"qcom,cdc-ecpp-dmic-rate",
&prop_val);
if (!rc)
ecpp_dmic_sample_rate = prop_val;
}
pdata->ecpp_dmic_sample_rate = wcd9xxx_validate_dmic_sample_rate(dev,
ecpp_dmic_sample_rate,
pdata->mclk_rate,
"ecpp_dmic_rate");
if (!(of_property_read_u32(dev->of_node,
"qcom,cdc-dmic-clk-drv-strength",
&prop_val))) {
dmic_clk_drive = prop_val;
if (dmic_clk_drive != 2 && dmic_clk_drive != 4 &&
dmic_clk_drive != 8 && dmic_clk_drive != 16)
dev_err(dev, "Invalid cdc-dmic-clk-drv-strength %d\n",
dmic_clk_drive);
}
pdata->dmic_clk_drv = dmic_clk_drive;
return pdata;
err_parse_dt_prop:
devm_kfree(dev, pdata->regulator);
pdata->regulator = NULL;
pdata->num_supplies = 0;
err_power_sup:
devm_kfree(dev, pdata);
return NULL;
}
EXPORT_SYMBOL(wcd9xxx_populate_dt_data);
static bool is_wcd9xxx_reg_power_down(struct wcd9xxx *wcd9xxx, u16 rreg)
{
bool ret = false;
int i;
struct wcd9xxx_power_region *wcd9xxx_pwr;
if (!wcd9xxx)
return ret;
for (i = 0; i < WCD9XXX_MAX_PWR_REGIONS; i++) {
wcd9xxx_pwr = wcd9xxx->wcd9xxx_pwr[i];
if (!wcd9xxx_pwr)
continue;
if (((wcd9xxx_pwr->pwr_collapse_reg_min == 0) &&
(wcd9xxx_pwr->pwr_collapse_reg_max == 0)) ||
(wcd9xxx_pwr->power_state ==
WCD_REGION_POWER_COLLAPSE_REMOVE))
ret = false;
else if (((wcd9xxx_pwr->power_state ==
WCD_REGION_POWER_DOWN) ||
(wcd9xxx_pwr->power_state ==
WCD_REGION_POWER_COLLAPSE_BEGIN)) &&
(rreg >= wcd9xxx_pwr->pwr_collapse_reg_min) &&
(rreg <= wcd9xxx_pwr->pwr_collapse_reg_max))
ret = true;
}
return ret;
}
/*
* wcd9xxx_page_write:
* Retrieve page number from register and
* write that page number to the page address.
* Called under io_lock acquisition.
*
* @wcd9xxx: pointer to wcd9xxx
* @reg: Register address from which page number is retrieved
*
* Returns 0 for success and negative error code for failure.
*/
int wcd9xxx_page_write(struct wcd9xxx *wcd9xxx, unsigned short *reg)
{
int ret = 0;
unsigned short c_reg, reg_addr;
u8 pg_num, prev_pg_num;
if (wcd9xxx->type != WCD9335 && wcd9xxx->type != WCD934X)
return ret;
c_reg = *reg;
pg_num = c_reg >> 8;
reg_addr = c_reg & 0xff;
if (wcd9xxx->prev_pg_valid) {
prev_pg_num = wcd9xxx->prev_pg;
if (prev_pg_num != pg_num) {
ret = wcd9xxx->write_dev(
wcd9xxx, PAGE_REG_ADDR, 1,
(void *) &pg_num, false);
if (ret < 0)
pr_err("page write error, pg_num: 0x%x\n",
pg_num);
else {
wcd9xxx->prev_pg = pg_num;
dev_dbg(wcd9xxx->dev, "%s: Page 0x%x Write to 0x00\n",
__func__, pg_num);
}
}
} else {
ret = wcd9xxx->write_dev(
wcd9xxx, PAGE_REG_ADDR, 1, (void *) &pg_num,
false);
if (ret < 0)
pr_err("page write error, pg_num: 0x%x\n", pg_num);
else {
wcd9xxx->prev_pg = pg_num;
wcd9xxx->prev_pg_valid = true;
dev_dbg(wcd9xxx->dev, "%s: Page 0x%x Write to 0x00\n",
__func__, pg_num);
}
}
*reg = reg_addr;
return ret;
}
EXPORT_SYMBOL(wcd9xxx_page_write);
static int regmap_bus_read(void *context, const void *reg, size_t reg_size,
void *val, size_t val_size)
{
struct device *dev = context;
struct wcd9xxx *wcd9xxx = dev_get_drvdata(dev);
unsigned short c_reg, rreg;
int ret, i;
if (!wcd9xxx) {
dev_err(dev, "%s: wcd9xxx is NULL\n", __func__);
return -EINVAL;
}
if (!reg || !val) {
dev_err(dev, "%s: reg or val is NULL\n", __func__);
return -EINVAL;
}
if (reg_size != REG_BYTES) {
dev_err(dev, "%s: register size %zd bytes, not supported\n",
__func__, reg_size);
return -EINVAL;
}
mutex_lock(&wcd9xxx->io_lock);
c_reg = *(u16 *)reg;
rreg = c_reg;
if (is_wcd9xxx_reg_power_down(wcd9xxx, rreg)) {
ret = 0;
for (i = 0; i < val_size; i++)
((u8 *)val)[i] = 0;
goto err;
}
ret = wcd9xxx_page_write(wcd9xxx, &c_reg);
if (ret)
goto err;
ret = wcd9xxx->read_dev(wcd9xxx, c_reg, val_size, val, false);
if (ret < 0)
dev_err(dev, "%s: Codec read failed (%d), reg: 0x%x, size:%zd\n",
__func__, ret, rreg, val_size);
else {
for (i = 0; i < val_size; i++)
dev_dbg(dev, "%s: Read 0x%02x from 0x%x\n",
__func__, ((u8 *)val)[i], rreg + i);
}
err:
mutex_unlock(&wcd9xxx->io_lock);
return ret;
}
static int regmap_bus_gather_write(void *context,
const void *reg, size_t reg_size,
const void *val, size_t val_size)
{
struct device *dev = context;
struct wcd9xxx *wcd9xxx = dev_get_drvdata(dev);
unsigned short c_reg, rreg;
int ret, i;
if (!wcd9xxx) {
dev_err(dev, "%s: wcd9xxx is NULL\n", __func__);
return -EINVAL;
}
if (!reg || !val) {
dev_err(dev, "%s: reg or val is NULL\n", __func__);
return -EINVAL;
}
if (reg_size != REG_BYTES) {
dev_err(dev, "%s: register size %zd bytes, not supported\n",
__func__, reg_size);
return -EINVAL;
}
mutex_lock(&wcd9xxx->io_lock);
c_reg = *(u16 *)reg;
rreg = c_reg;
if (is_wcd9xxx_reg_power_down(wcd9xxx, rreg)) {
ret = 0;
goto err;
}
ret = wcd9xxx_page_write(wcd9xxx, &c_reg);
if (ret)
goto err;
for (i = 0; i < val_size; i++)
dev_dbg(dev, "Write %02x to 0x%x\n", ((u8 *)val)[i],
rreg + i);
ret = wcd9xxx->write_dev(wcd9xxx, c_reg, val_size, (void *) val,
false);
if (ret < 0)
dev_err(dev, "%s: Codec write failed (%d), reg:0x%x, size:%zd\n",
__func__, ret, rreg, val_size);
err:
mutex_unlock(&wcd9xxx->io_lock);
return ret;
}
static int regmap_bus_write(void *context, const void *data, size_t count)
{
struct device *dev = context;
struct wcd9xxx *wcd9xxx = dev_get_drvdata(dev);
if (!wcd9xxx)
return -EINVAL;
WARN_ON(count < REG_BYTES);
if (count > (REG_BYTES + VAL_BYTES)) {
if (wcd9xxx->multi_reg_write)
return wcd9xxx->multi_reg_write(wcd9xxx,
data, count);
} else
return regmap_bus_gather_write(context, data, REG_BYTES,
data + REG_BYTES,
count - REG_BYTES);
dev_err(dev, "%s: bus multi reg write failure\n", __func__);
return -EINVAL;
}
static struct regmap_bus regmap_bus_config = {
.write = regmap_bus_write,
.gather_write = regmap_bus_gather_write,
.read = regmap_bus_read,
.reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
};
/*
* wcd9xxx_regmap_init:
* Initialize wcd9xxx register map
*
* @dev: pointer to wcd device
* @config: pointer to register map config
*
* Returns pointer to regmap structure for success
* or NULL in case of failure.
*/
struct regmap *wcd9xxx_regmap_init(struct device *dev,
const struct regmap_config *config)
{
return devm_regmap_init(dev, &regmap_bus_config, dev, config);
}
EXPORT_SYMBOL(wcd9xxx_regmap_init);
/*
* wcd9xxx_reset:
* Reset wcd9xxx codec
*
* @dev: pointer to wcd device
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_reset(struct device *dev)
{
struct wcd9xxx *wcd9xxx;
int rc;
int value;
if (!dev)
return -ENODEV;
wcd9xxx = dev_get_drvdata(dev);
if (!wcd9xxx)
return -EINVAL;
if (!wcd9xxx->wcd_rst_np) {
dev_err(dev, "%s: reset gpio device node not specified\n",
__func__);
return -EINVAL;
}
value = msm_cdc_get_gpio_state(wcd9xxx->wcd_rst_np);
if (value > 0) {
wcd9xxx->avoid_cdc_rstlow = 1;
return 0;
}
rc = msm_cdc_pinctrl_select_sleep_state(wcd9xxx->wcd_rst_np);
if (rc) {
dev_err(dev, "%s: wcd sleep state request fail!\n",
__func__);
return rc;
}
/* 20ms sleep required after pulling the reset gpio to LOW */
msleep(20);
rc = msm_cdc_pinctrl_select_active_state(wcd9xxx->wcd_rst_np);
if (rc) {
dev_err(dev, "%s: wcd active state request fail!\n",
__func__);
return rc;
}
msleep(20);
return rc;
}
EXPORT_SYMBOL(wcd9xxx_reset);
/*
* wcd9xxx_reset_low:
* Pull the wcd9xxx codec reset_n to low
*
* @dev: pointer to wcd device
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_reset_low(struct device *dev)
{
struct wcd9xxx *wcd9xxx;
int rc;
if (!dev)
return -ENODEV;
wcd9xxx = dev_get_drvdata(dev);
if (!wcd9xxx)
return -EINVAL;
if (!wcd9xxx->wcd_rst_np) {
dev_err(dev, "%s: reset gpio device node not specified\n",
__func__);
return -EINVAL;
}
if (wcd9xxx->avoid_cdc_rstlow) {
wcd9xxx->avoid_cdc_rstlow = 0;
dev_dbg(dev, "%s: avoid pull down of reset GPIO\n", __func__);
return 0;
}
rc = msm_cdc_pinctrl_select_sleep_state(wcd9xxx->wcd_rst_np);
if (rc)
dev_err(dev, "%s: wcd sleep state request fail!\n",
__func__);
return rc;
}
EXPORT_SYMBOL(wcd9xxx_reset_low);
/*
* wcd9xxx_bringup:
* Toggle reset analog and digital cores of wcd9xxx codec
*
* @dev: pointer to wcd device
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_bringup(struct device *dev)
{
struct wcd9xxx *wcd9xxx;
int rc;
codec_bringup_fn cdc_bup_fn;
if (!dev)
return -ENODEV;
wcd9xxx = dev_get_drvdata(dev);
if (!wcd9xxx)
return -EINVAL;
cdc_bup_fn = wcd9xxx_bringup_fn(wcd9xxx->type);
if (!cdc_bup_fn) {
dev_err(dev, "%s: Codec bringup fn NULL!\n",
__func__);
return -EINVAL;
}
rc = cdc_bup_fn(wcd9xxx);
if (rc)
dev_err(dev, "%s: Codec bringup error, rc: %d\n",
__func__, rc);
return rc;
}
EXPORT_SYMBOL(wcd9xxx_bringup);
/*
* wcd9xxx_bringup:
* Set analog and digital cores of wcd9xxx codec in reset state
*
* @dev: pointer to wcd device
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_bringdown(struct device *dev)
{
struct wcd9xxx *wcd9xxx;
int rc;
codec_bringdown_fn cdc_bdown_fn;
if (!dev)
return -ENODEV;
wcd9xxx = dev_get_drvdata(dev);
if (!wcd9xxx)
return -EINVAL;
cdc_bdown_fn = wcd9xxx_bringdown_fn(wcd9xxx->type);
if (!cdc_bdown_fn) {
dev_err(dev, "%s: Codec bring down fn NULL!\n",
__func__);
return -EINVAL;
}
rc = cdc_bdown_fn(wcd9xxx);
if (rc)
dev_err(dev, "%s: Codec bring down error, rc: %d\n",
__func__, rc);
return rc;
}
EXPORT_SYMBOL(wcd9xxx_bringdown);
/*
* wcd9xxx_get_codec_info:
* Fill codec specific information like interrupts, version
*
* @dev: pointer to wcd device
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_get_codec_info(struct device *dev)
{
struct wcd9xxx *wcd9xxx;
int rc;
codec_type_fn cdc_type_fn;
struct wcd9xxx_codec_type *cinfo;
if (!dev)
return -ENODEV;
wcd9xxx = dev_get_drvdata(dev);
if (!wcd9xxx)
return -EINVAL;
cdc_type_fn = wcd9xxx_get_codec_info_fn(wcd9xxx->type);
if (!cdc_type_fn) {
dev_err(dev, "%s: Codec fill type fn NULL!\n",
__func__);
return -EINVAL;
}
cinfo = wcd9xxx->codec_type;
if (!cinfo)
return -EINVAL;
rc = cdc_type_fn(wcd9xxx, cinfo);
if (rc) {
dev_err(dev, "%s: Codec type fill failed, rc:%d\n",
__func__, rc);
return rc;
}
switch (wcd9xxx->type) {
case WCD934X:
cinfo->dev = tavil_devs;
cinfo->size = ARRAY_SIZE(tavil_devs);
break;
case WCD9335:
cinfo->dev = tasha_devs;
cinfo->size = ARRAY_SIZE(tasha_devs);
break;
case WCD9330:
cinfo->dev = tomtom_devs;
cinfo->size = ARRAY_SIZE(tomtom_devs);
break;
default:
cinfo->dev = NULL;
cinfo->size = 0;
break;
}
return rc;
}
EXPORT_SYMBOL(wcd9xxx_get_codec_info);
/*
* wcd9xxx_core_irq_init:
* Initialize wcd9xxx codec irq instance
*
* @wcd9xxx_core_res: pointer to wcd core resource
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_core_irq_init(
struct wcd9xxx_core_resource *wcd9xxx_core_res)
{
int ret = 0;
if (!wcd9xxx_core_res)
return -EINVAL;
if (wcd9xxx_core_res->irq != 1) {
ret = wcd9xxx_irq_init(wcd9xxx_core_res);
if (ret)
pr_err("IRQ initialization failed\n");
}
return ret;
}
EXPORT_SYMBOL(wcd9xxx_core_irq_init);
/*
* wcd9xxx_assign_irq:
* Assign irq and irq_base to wcd9xxx core resource
*
* @wcd9xxx_core_res: pointer to wcd core resource
* @irq: irq number
* @irq_base: base irq number
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_assign_irq(
struct wcd9xxx_core_resource *wcd9xxx_core_res,
unsigned int irq,
unsigned int irq_base)
{
if (!wcd9xxx_core_res)
return -EINVAL;
wcd9xxx_core_res->irq = irq;
wcd9xxx_core_res->irq_base = irq_base;
return 0;
}
EXPORT_SYMBOL(wcd9xxx_assign_irq);
/*
* wcd9xxx_core_res_init:
* Initialize wcd core resource instance
*
* @wcd9xxx_core_res: pointer to wcd core resource
* @num_irqs: number of irqs for wcd9xxx core
* @num_irq_regs: number of irq registers
* @wcd_regmap: pointer to the wcd register map
*
* Returns 0 for success or negative error code in case of failure
*/
int wcd9xxx_core_res_init(
struct wcd9xxx_core_resource *wcd9xxx_core_res,
int num_irqs, int num_irq_regs, struct regmap *wcd_regmap)
{
if (!wcd9xxx_core_res || !wcd_regmap)
return -EINVAL;
mutex_init(&wcd9xxx_core_res->pm_lock);
wcd9xxx_core_res->wlock_holders = 0;
wcd9xxx_core_res->pm_state = WCD9XXX_PM_SLEEPABLE;
init_waitqueue_head(&wcd9xxx_core_res->pm_wq);
pm_qos_add_request(&wcd9xxx_core_res->pm_qos_req,
PM_QOS_CPU_DMA_LATENCY,
PM_QOS_DEFAULT_VALUE);
wcd9xxx_core_res->num_irqs = num_irqs;
wcd9xxx_core_res->num_irq_regs = num_irq_regs;
wcd9xxx_core_res->wcd_core_regmap = wcd_regmap;
pr_info("%s: num_irqs = %d, num_irq_regs = %d\n",
__func__, wcd9xxx_core_res->num_irqs,
wcd9xxx_core_res->num_irq_regs);
return 0;
}
EXPORT_SYMBOL(wcd9xxx_core_res_init);
/*
* wcd9xxx_core_res_deinit:
* Deinit wcd core resource instance
*
* @wcd9xxx_core_res: pointer to wcd core resource
*/
void wcd9xxx_core_res_deinit(struct wcd9xxx_core_resource *wcd9xxx_core_res)
{
if (!wcd9xxx_core_res)
return;
pm_qos_remove_request(&wcd9xxx_core_res->pm_qos_req);
mutex_destroy(&wcd9xxx_core_res->pm_lock);
}
EXPORT_SYMBOL(wcd9xxx_core_res_deinit);
/*
* wcd9xxx_pm_cmpxchg:
* Check old state and exchange with pm new state
* if old state matches with current state
*
* @wcd9xxx_core_res: pointer to wcd core resource
* @o: pm old state
* @n: pm new state
*
* Returns old state
*/
enum wcd9xxx_pm_state wcd9xxx_pm_cmpxchg(
struct wcd9xxx_core_resource *wcd9xxx_core_res,
enum wcd9xxx_pm_state o,
enum wcd9xxx_pm_state n)
{
enum wcd9xxx_pm_state old;
if (!wcd9xxx_core_res)
return o;
mutex_lock(&wcd9xxx_core_res->pm_lock);
old = wcd9xxx_core_res->pm_state;
if (old == o)
wcd9xxx_core_res->pm_state = n;
mutex_unlock(&wcd9xxx_core_res->pm_lock);
return old;
}
EXPORT_SYMBOL(wcd9xxx_pm_cmpxchg);
/*
* wcd9xxx_core_res_suspend:
* Suspend callback function for wcd9xxx core
*
* @wcd9xxx_core_res: pointer to wcd core resource
* @pm_message_t: pm message
*
* Returns 0 for success or negative error code for failure/busy
*/
int wcd9xxx_core_res_suspend(
struct wcd9xxx_core_resource *wcd9xxx_core_res,
pm_message_t pmesg)
{
int ret = 0;
pr_debug("%s: enter\n", __func__);
/*
* pm_qos_update_request() can be called after this suspend chain call
* started. thus suspend can be called while lock is being held
*/
mutex_lock(&wcd9xxx_core_res->pm_lock);
if (wcd9xxx_core_res->pm_state == WCD9XXX_PM_SLEEPABLE) {
pr_debug("%s: suspending system, state %d, wlock %d\n",
__func__, wcd9xxx_core_res->pm_state,
wcd9xxx_core_res->wlock_holders);
wcd9xxx_core_res->pm_state = WCD9XXX_PM_ASLEEP;
} else if (wcd9xxx_core_res->pm_state == WCD9XXX_PM_AWAKE) {
/*
* unlock to wait for pm_state == WCD9XXX_PM_SLEEPABLE
* then set to WCD9XXX_PM_ASLEEP
*/
pr_debug("%s: waiting to suspend system, state %d, wlock %d\n",
__func__, wcd9xxx_core_res->pm_state,
wcd9xxx_core_res->wlock_holders);
mutex_unlock(&wcd9xxx_core_res->pm_lock);
if (!(wait_event_timeout(wcd9xxx_core_res->pm_wq,
wcd9xxx_pm_cmpxchg(wcd9xxx_core_res,
WCD9XXX_PM_SLEEPABLE,
WCD9XXX_PM_ASLEEP) ==
WCD9XXX_PM_SLEEPABLE,
HZ))) {
pr_debug("%s: suspend failed state %d, wlock %d\n",
__func__, wcd9xxx_core_res->pm_state,
wcd9xxx_core_res->wlock_holders);
ret = -EBUSY;
} else {
pr_debug("%s: done, state %d, wlock %d\n", __func__,
wcd9xxx_core_res->pm_state,
wcd9xxx_core_res->wlock_holders);
}
mutex_lock(&wcd9xxx_core_res->pm_lock);
} else if (wcd9xxx_core_res->pm_state == WCD9XXX_PM_ASLEEP) {
pr_warn("%s: system is already suspended, state %d, wlock %dn",
__func__, wcd9xxx_core_res->pm_state,
wcd9xxx_core_res->wlock_holders);
}
mutex_unlock(&wcd9xxx_core_res->pm_lock);
return ret;
}
EXPORT_SYMBOL(wcd9xxx_core_res_suspend);
/*
* wcd9xxx_core_res_resume:
* Resume callback function for wcd9xxx core
*
* @wcd9xxx_core_res: pointer to wcd core resource
*
* Returns 0 for success or negative error code for failure/busy
*/
int wcd9xxx_core_res_resume(
struct wcd9xxx_core_resource *wcd9xxx_core_res)
{
int ret = 0;
pr_debug("%s: enter\n", __func__);
mutex_lock(&wcd9xxx_core_res->pm_lock);
if (wcd9xxx_core_res->pm_state == WCD9XXX_PM_ASLEEP) {
pr_debug("%s: resuming system, state %d, wlock %d\n", __func__,
wcd9xxx_core_res->pm_state,
wcd9xxx_core_res->wlock_holders);
wcd9xxx_core_res->pm_state = WCD9XXX_PM_SLEEPABLE;
} else {
pr_warn("%s: system is already awake, state %d wlock %d\n",
__func__, wcd9xxx_core_res->pm_state,
wcd9xxx_core_res->wlock_holders);
}
mutex_unlock(&wcd9xxx_core_res->pm_lock);
wake_up_all(&wcd9xxx_core_res->pm_wq);
return ret;
}
EXPORT_SYMBOL(wcd9xxx_core_res_resume);
/*
* wcd9xxx_get_intf_type:
* Get interface type of wcd9xxx core
*
* Returns interface type
*/
enum wcd9xxx_intf_status wcd9xxx_get_intf_type(void)
{
return wcd9xxx_intf;
}
EXPORT_SYMBOL(wcd9xxx_get_intf_type);
/*
* wcd9xxx_set_intf_type:
* Set interface type of wcd9xxx core
*
*/
void wcd9xxx_set_intf_type(enum wcd9xxx_intf_status intf_status)
{
wcd9xxx_intf = intf_status;
}
EXPORT_SYMBOL(wcd9xxx_set_intf_type);
/*
* wcd9xxx_set_power_state: set power state for the region
* @wcd9xxx: handle to wcd core
* @state: power state to be set
* @region: region index
*
* Returns error code in case of failure or 0 for success
*/
int wcd9xxx_set_power_state(struct wcd9xxx *wcd9xxx,
enum codec_power_states state,
enum wcd_power_regions region)
{
if (!wcd9xxx) {
pr_err("%s: wcd9xxx is NULL\n", __func__);
return -EINVAL;
}
if ((region < 0) || (region >= WCD9XXX_MAX_PWR_REGIONS)) {
dev_err(wcd9xxx->dev, "%s: region index %d out of bounds\n",
__func__, region);
return -EINVAL;
}
if (!wcd9xxx->wcd9xxx_pwr[region]) {
dev_err(wcd9xxx->dev, "%s: memory not created for region: %d\n",
__func__, region);
return -EINVAL;
}
mutex_lock(&wcd9xxx->io_lock);
wcd9xxx->wcd9xxx_pwr[region]->power_state = state;
mutex_unlock(&wcd9xxx->io_lock);
return 0;
}
EXPORT_SYMBOL(wcd9xxx_set_power_state);
/*
* wcd9xxx_get_current_power_state: Get power state of the region
* @wcd9xxx: handle to wcd core
* @region: region index
*
* Returns current power state of the region or error code for failure
*/
int wcd9xxx_get_current_power_state(struct wcd9xxx *wcd9xxx,
enum wcd_power_regions region)
{
int state;
if (!wcd9xxx) {
pr_err("%s: wcd9xxx is NULL\n", __func__);
return -EINVAL;
}
if ((region < 0) || (region >= WCD9XXX_MAX_PWR_REGIONS)) {
dev_err(wcd9xxx->dev, "%s: region index %d out of bounds\n",
__func__, region);
return -EINVAL;
}
if (!wcd9xxx->wcd9xxx_pwr[region]) {
dev_err(wcd9xxx->dev, "%s: memory not created for region: %d\n",
__func__, region);
return -EINVAL;
}
mutex_lock(&wcd9xxx->io_lock);
state = wcd9xxx->wcd9xxx_pwr[region]->power_state;
mutex_unlock(&wcd9xxx->io_lock);
return state;
}
EXPORT_SYMBOL(wcd9xxx_get_current_power_state);