298 lines
8.1 KiB
C
298 lines
8.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019, Linaro Limited
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#include <linux/clk.h>
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#include <linux/gpio/consumer.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/wcd934x/registers.h>
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#include <linux/mfd/wcd934x/wcd934x.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slimbus.h>
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#define WCD934X_REGMAP_IRQ_REG(_irq, _off, _mask) \
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[_irq] = { \
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.reg_offset = (_off), \
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.mask = (_mask), \
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.type = { \
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.type_reg_offset = (_off), \
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.types_supported = IRQ_TYPE_EDGE_BOTH, \
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.type_reg_mask = (_mask), \
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.type_level_low_val = (_mask), \
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.type_level_high_val = (_mask), \
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.type_falling_val = 0, \
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.type_rising_val = 0, \
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}, \
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}
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static const struct mfd_cell wcd934x_devices[] = {
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{
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.name = "wcd934x-codec",
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}, {
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.name = "wcd934x-gpio",
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.of_compatible = "qcom,wcd9340-gpio",
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}, {
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.name = "wcd934x-soundwire",
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.of_compatible = "qcom,soundwire-v1.3.0",
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},
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};
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static const struct regmap_irq wcd934x_irqs[] = {
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SLIMBUS, 0, BIT(0)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPL_FAULT, 0, BIT(2)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPR_FAULT, 0, BIT(3)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_SW_DET, 1, BIT(0)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_DET, 1, BIT(1)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_PRESS_DET, 1, BIT(2)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_RELEASE_DET, 1, BIT(3)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_LEG_DET, 1, BIT(4)),
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WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SOUNDWIRE, 2, BIT(4)),
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};
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static const struct regmap_irq_chip wcd934x_regmap_irq_chip = {
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.name = "wcd934x_irq",
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.status_base = WCD934X_INTR_PIN1_STATUS0,
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.mask_base = WCD934X_INTR_PIN1_MASK0,
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.ack_base = WCD934X_INTR_PIN1_CLEAR0,
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.type_base = WCD934X_INTR_LEVEL0,
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.num_type_reg = 4,
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.type_in_mask = false,
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.num_regs = 4,
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.irqs = wcd934x_irqs,
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.num_irqs = ARRAY_SIZE(wcd934x_irqs),
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};
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static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3:
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case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0:
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case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1:
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case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2:
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case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3:
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case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS:
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case WCD934X_ANA_MBHC_RESULT_3:
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case WCD934X_ANA_MBHC_RESULT_2:
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case WCD934X_ANA_MBHC_RESULT_1:
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case WCD934X_ANA_MBHC_MECH:
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case WCD934X_ANA_MBHC_ELECT:
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case WCD934X_ANA_MBHC_ZDET:
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case WCD934X_ANA_MICB2:
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case WCD934X_ANA_RCO:
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case WCD934X_ANA_BIAS:
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return true;
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default:
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return false;
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}
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};
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static const struct regmap_range_cfg wcd934x_ranges[] = {
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{ .name = "WCD934X",
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.range_min = 0x0,
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.range_max = WCD934X_MAX_REGISTER,
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.selector_reg = WCD934X_SEL_REGISTER,
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.selector_mask = WCD934X_SEL_MASK,
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.selector_shift = WCD934X_SEL_SHIFT,
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.window_start = WCD934X_WINDOW_START,
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.window_len = WCD934X_WINDOW_LENGTH,
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},
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};
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static struct regmap_config wcd934x_regmap_config = {
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.reg_bits = 16,
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.val_bits = 8,
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.cache_type = REGCACHE_RBTREE,
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.max_register = 0xffff,
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.can_multi_write = true,
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.ranges = wcd934x_ranges,
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.num_ranges = ARRAY_SIZE(wcd934x_ranges),
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.volatile_reg = wcd934x_is_volatile_register,
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};
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static int wcd934x_bring_up(struct wcd934x_ddata *ddata)
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{
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struct regmap *regmap = ddata->regmap;
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u16 id_minor, id_major;
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int ret;
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ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0,
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(u8 *)&id_minor, sizeof(u16));
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if (ret)
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return ret;
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ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2,
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(u8 *)&id_major, sizeof(u16));
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if (ret)
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return ret;
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dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n",
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id_major, id_minor);
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regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01);
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regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19);
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regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15);
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/* Add 1msec delay for VOUT to settle */
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usleep_range(1000, 1100);
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regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5);
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regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7);
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regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3);
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regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7);
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regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3);
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return 0;
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}
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static int wcd934x_slim_status_up(struct slim_device *sdev)
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{
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struct device *dev = &sdev->dev;
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struct wcd934x_ddata *ddata;
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int ret;
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ddata = dev_get_drvdata(dev);
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ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config);
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if (IS_ERR(ddata->regmap)) {
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dev_err(dev, "Error allocating slim regmap\n");
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return PTR_ERR(ddata->regmap);
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}
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ret = wcd934x_bring_up(ddata);
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if (ret) {
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dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret);
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return ret;
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}
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ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
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IRQF_TRIGGER_HIGH, 0,
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&wcd934x_regmap_irq_chip,
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&ddata->irq_data);
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if (ret) {
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dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret);
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return ret;
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}
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ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices,
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ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL);
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if (ret) {
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dev_err(dev, "Failed to add child devices: err = %d\n",
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ret);
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return ret;
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}
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return ret;
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}
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static int wcd934x_slim_status(struct slim_device *sdev,
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enum slim_device_status status)
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{
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switch (status) {
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case SLIM_DEVICE_STATUS_UP:
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return wcd934x_slim_status_up(sdev);
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case SLIM_DEVICE_STATUS_DOWN:
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mfd_remove_devices(&sdev->dev);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int wcd934x_slim_probe(struct slim_device *sdev)
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{
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struct device *dev = &sdev->dev;
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struct device_node *np = dev->of_node;
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struct wcd934x_ddata *ddata;
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struct gpio_desc *reset_gpio;
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int ret;
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ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
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if (!ddata)
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return -ENOMEM;
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ddata->irq = of_irq_get(np, 0);
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if (ddata->irq < 0)
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return dev_err_probe(ddata->dev, ddata->irq,
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"Failed to get IRQ\n");
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ddata->extclk = devm_clk_get(dev, "extclk");
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if (IS_ERR(ddata->extclk)) {
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dev_err(dev, "Failed to get extclk");
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return PTR_ERR(ddata->extclk);
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}
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ddata->supplies[0].supply = "vdd-buck";
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ddata->supplies[1].supply = "vdd-buck-sido";
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ddata->supplies[2].supply = "vdd-tx";
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ddata->supplies[3].supply = "vdd-rx";
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ddata->supplies[4].supply = "vdd-io";
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ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies);
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if (ret) {
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dev_err(dev, "Failed to get supplies: err = %d\n", ret);
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return ret;
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}
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ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies);
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if (ret) {
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dev_err(dev, "Failed to enable supplies: err = %d\n", ret);
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return ret;
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}
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/*
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* For WCD934X, it takes about 600us for the Vout_A and
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* Vout_D to be ready after BUCK_SIDO is powered up.
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* SYS_RST_N shouldn't be pulled high during this time
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*/
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usleep_range(600, 650);
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reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(reset_gpio)) {
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return dev_err_probe(dev, PTR_ERR(reset_gpio),
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"Failed to get reset gpio: err = %ld\n", PTR_ERR(reset_gpio));
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}
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msleep(20);
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gpiod_set_value(reset_gpio, 1);
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msleep(20);
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ddata->dev = dev;
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dev_set_drvdata(dev, ddata);
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return 0;
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}
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static void wcd934x_slim_remove(struct slim_device *sdev)
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{
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struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev);
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regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies);
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mfd_remove_devices(&sdev->dev);
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}
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static const struct slim_device_id wcd934x_slim_id[] = {
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{ SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340,
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SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 },
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{}
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};
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static struct slim_driver wcd934x_slim_driver = {
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.driver = {
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.name = "wcd934x-slim",
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},
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.probe = wcd934x_slim_probe,
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.remove = wcd934x_slim_remove,
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.device_status = wcd934x_slim_status,
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.id_table = wcd934x_slim_id,
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};
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module_slim_driver(wcd934x_slim_driver);
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MODULE_DESCRIPTION("WCD934X slim driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("slim:217:250:*");
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MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
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