307 строки
7.8 KiB
C
307 строки
7.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (c) 2019, Linaro Limited
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/wcd934x/registers.h>
|
|
#include <linux/mfd/wcd934x/wcd934x.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/slimbus.h>
|
|
|
|
static const struct mfd_cell wcd934x_devices[] = {
|
|
{
|
|
.name = "wcd934x-codec",
|
|
}, {
|
|
.name = "wcd934x-gpio",
|
|
.of_compatible = "qcom,wcd9340-gpio",
|
|
}, {
|
|
.name = "wcd934x-soundwire",
|
|
.of_compatible = "qcom,soundwire-v1.3.0",
|
|
},
|
|
};
|
|
|
|
static const struct regmap_irq wcd934x_irqs[] = {
|
|
[WCD934X_IRQ_SLIMBUS] = {
|
|
.reg_offset = 0,
|
|
.mask = BIT(0),
|
|
.type = {
|
|
.type_reg_offset = 0,
|
|
.types_supported = IRQ_TYPE_EDGE_BOTH,
|
|
.type_reg_mask = BIT(0),
|
|
.type_level_low_val = BIT(0),
|
|
.type_level_high_val = BIT(0),
|
|
.type_falling_val = 0,
|
|
.type_rising_val = 0,
|
|
},
|
|
},
|
|
[WCD934X_IRQ_SOUNDWIRE] = {
|
|
.reg_offset = 2,
|
|
.mask = BIT(4),
|
|
.type = {
|
|
.type_reg_offset = 2,
|
|
.types_supported = IRQ_TYPE_EDGE_BOTH,
|
|
.type_reg_mask = BIT(4),
|
|
.type_level_low_val = BIT(4),
|
|
.type_level_high_val = BIT(4),
|
|
.type_falling_val = 0,
|
|
.type_rising_val = 0,
|
|
},
|
|
},
|
|
};
|
|
|
|
static const struct regmap_irq_chip wcd934x_regmap_irq_chip = {
|
|
.name = "wcd934x_irq",
|
|
.status_base = WCD934X_INTR_PIN1_STATUS0,
|
|
.mask_base = WCD934X_INTR_PIN1_MASK0,
|
|
.ack_base = WCD934X_INTR_PIN1_CLEAR0,
|
|
.type_base = WCD934X_INTR_LEVEL0,
|
|
.num_type_reg = 4,
|
|
.type_in_mask = false,
|
|
.num_regs = 4,
|
|
.irqs = wcd934x_irqs,
|
|
.num_irqs = ARRAY_SIZE(wcd934x_irqs),
|
|
};
|
|
|
|
static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3:
|
|
case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0:
|
|
case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1:
|
|
case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2:
|
|
case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3:
|
|
case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS:
|
|
case WCD934X_ANA_MBHC_RESULT_3:
|
|
case WCD934X_ANA_MBHC_RESULT_2:
|
|
case WCD934X_ANA_MBHC_RESULT_1:
|
|
case WCD934X_ANA_MBHC_MECH:
|
|
case WCD934X_ANA_MBHC_ELECT:
|
|
case WCD934X_ANA_MBHC_ZDET:
|
|
case WCD934X_ANA_MICB2:
|
|
case WCD934X_ANA_RCO:
|
|
case WCD934X_ANA_BIAS:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
};
|
|
|
|
static const struct regmap_range_cfg wcd934x_ranges[] = {
|
|
{ .name = "WCD934X",
|
|
.range_min = 0x0,
|
|
.range_max = WCD934X_MAX_REGISTER,
|
|
.selector_reg = WCD934X_SEL_REGISTER,
|
|
.selector_mask = WCD934X_SEL_MASK,
|
|
.selector_shift = WCD934X_SEL_SHIFT,
|
|
.window_start = WCD934X_WINDOW_START,
|
|
.window_len = WCD934X_WINDOW_LENGTH,
|
|
},
|
|
};
|
|
|
|
static struct regmap_config wcd934x_regmap_config = {
|
|
.reg_bits = 16,
|
|
.val_bits = 8,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.max_register = 0xffff,
|
|
.can_multi_write = true,
|
|
.ranges = wcd934x_ranges,
|
|
.num_ranges = ARRAY_SIZE(wcd934x_ranges),
|
|
.volatile_reg = wcd934x_is_volatile_register,
|
|
};
|
|
|
|
static int wcd934x_bring_up(struct wcd934x_ddata *ddata)
|
|
{
|
|
struct regmap *regmap = ddata->regmap;
|
|
u16 id_minor, id_major;
|
|
int ret;
|
|
|
|
ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0,
|
|
(u8 *)&id_minor, sizeof(u16));
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2,
|
|
(u8 *)&id_major, sizeof(u16));
|
|
if (ret)
|
|
return ret;
|
|
|
|
dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n",
|
|
id_major, id_minor);
|
|
|
|
regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01);
|
|
regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19);
|
|
regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15);
|
|
/* Add 1msec delay for VOUT to settle */
|
|
usleep_range(1000, 1100);
|
|
regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5);
|
|
regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7);
|
|
regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3);
|
|
regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7);
|
|
regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wcd934x_slim_status_up(struct slim_device *sdev)
|
|
{
|
|
struct device *dev = &sdev->dev;
|
|
struct wcd934x_ddata *ddata;
|
|
int ret;
|
|
|
|
ddata = dev_get_drvdata(dev);
|
|
|
|
ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config);
|
|
if (IS_ERR(ddata->regmap)) {
|
|
dev_err(dev, "Error allocating slim regmap\n");
|
|
return PTR_ERR(ddata->regmap);
|
|
}
|
|
|
|
ret = wcd934x_bring_up(ddata);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
|
|
IRQF_TRIGGER_HIGH, 0,
|
|
&wcd934x_regmap_irq_chip,
|
|
&ddata->irq_data);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices,
|
|
ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to add child devices: err = %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wcd934x_slim_status(struct slim_device *sdev,
|
|
enum slim_device_status status)
|
|
{
|
|
switch (status) {
|
|
case SLIM_DEVICE_STATUS_UP:
|
|
return wcd934x_slim_status_up(sdev);
|
|
case SLIM_DEVICE_STATUS_DOWN:
|
|
mfd_remove_devices(&sdev->dev);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wcd934x_slim_probe(struct slim_device *sdev)
|
|
{
|
|
struct device *dev = &sdev->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct wcd934x_ddata *ddata;
|
|
int reset_gpio, ret;
|
|
|
|
ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
|
|
if (!ddata)
|
|
return -ENOMEM;
|
|
|
|
ddata->irq = of_irq_get(np, 0);
|
|
if (ddata->irq < 0) {
|
|
if (ddata->irq != -EPROBE_DEFER)
|
|
dev_err(ddata->dev, "Failed to get IRQ: err = %d\n",
|
|
ddata->irq);
|
|
return ddata->irq;
|
|
}
|
|
|
|
reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
|
|
if (reset_gpio < 0) {
|
|
dev_err(dev, "Failed to get reset gpio: err = %d\n",
|
|
reset_gpio);
|
|
return reset_gpio;
|
|
}
|
|
|
|
ddata->extclk = devm_clk_get(dev, "extclk");
|
|
if (IS_ERR(ddata->extclk)) {
|
|
dev_err(dev, "Failed to get extclk");
|
|
return PTR_ERR(ddata->extclk);
|
|
}
|
|
|
|
ddata->supplies[0].supply = "vdd-buck";
|
|
ddata->supplies[1].supply = "vdd-buck-sido";
|
|
ddata->supplies[2].supply = "vdd-tx";
|
|
ddata->supplies[3].supply = "vdd-rx";
|
|
ddata->supplies[4].supply = "vdd-io";
|
|
|
|
ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to get supplies: err = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to enable supplies: err = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* For WCD934X, it takes about 600us for the Vout_A and
|
|
* Vout_D to be ready after BUCK_SIDO is powered up.
|
|
* SYS_RST_N shouldn't be pulled high during this time
|
|
*/
|
|
usleep_range(600, 650);
|
|
gpio_direction_output(reset_gpio, 0);
|
|
msleep(20);
|
|
gpio_set_value(reset_gpio, 1);
|
|
msleep(20);
|
|
|
|
ddata->dev = dev;
|
|
dev_set_drvdata(dev, ddata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void wcd934x_slim_remove(struct slim_device *sdev)
|
|
{
|
|
struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev);
|
|
|
|
regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies);
|
|
mfd_remove_devices(&sdev->dev);
|
|
kfree(ddata);
|
|
}
|
|
|
|
static const struct slim_device_id wcd934x_slim_id[] = {
|
|
{ SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340,
|
|
SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 },
|
|
{}
|
|
};
|
|
|
|
static struct slim_driver wcd934x_slim_driver = {
|
|
.driver = {
|
|
.name = "wcd934x-slim",
|
|
},
|
|
.probe = wcd934x_slim_probe,
|
|
.remove = wcd934x_slim_remove,
|
|
.device_status = wcd934x_slim_status,
|
|
.id_table = wcd934x_slim_id,
|
|
};
|
|
|
|
module_slim_driver(wcd934x_slim_driver);
|
|
MODULE_DESCRIPTION("WCD934X slim driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("slim:217:250:*");
|
|
MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
|