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path: root/drivers/mfd/arizona-core.c
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Diffstat (limited to 'drivers/mfd/arizona-core.c')
-rw-r--r--drivers/mfd/arizona-core.c527
1 files changed, 527 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
new file mode 100644
index 000000000000..42cb28b2b5c8
--- /dev/null
+++ b/drivers/mfd/arizona-core.c
@@ -0,0 +1,527 @@
+/*
+ * Arizona core driver
+ *
+ * Copyright 2012 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/registers.h>
+
+#include "arizona.h"
+
+static const char *wm5102_core_supplies[] = {
+ "AVDD",
+ "DBVDD1",
+ "DCVDD",
+};
+
+int arizona_clk32k_enable(struct arizona *arizona)
+{
+ int ret = 0;
+
+ mutex_lock(&arizona->clk_lock);
+
+ arizona->clk32k_ref++;
+
+ if (arizona->clk32k_ref == 1)
+ ret = regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+ ARIZONA_CLK_32K_ENA,
+ ARIZONA_CLK_32K_ENA);
+
+ if (ret != 0)
+ arizona->clk32k_ref--;
+
+ mutex_unlock(&arizona->clk_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(arizona_clk32k_enable);
+
+int arizona_clk32k_disable(struct arizona *arizona)
+{
+ int ret = 0;
+
+ mutex_lock(&arizona->clk_lock);
+
+ BUG_ON(arizona->clk32k_ref <= 0);
+
+ arizona->clk32k_ref--;
+
+ if (arizona->clk32k_ref == 0)
+ regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+ ARIZONA_CLK_32K_ENA, 0);
+
+ mutex_unlock(&arizona->clk_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(arizona_clk32k_disable);
+
+static irqreturn_t arizona_clkgen_err(int irq, void *data)
+{
+ struct arizona *arizona = data;
+
+ dev_err(arizona->dev, "CLKGEN error\n");
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t arizona_underclocked(int irq, void *data)
+{
+ struct arizona *arizona = data;
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_8,
+ &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read underclock status: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "AIF3 underclocked\n");
+ if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "AIF3 underclocked\n");
+ if (val & ARIZONA_AIF2_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "AIF1 underclocked\n");
+ if (val & ARIZONA_ISRC2_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "ISRC2 underclocked\n");
+ if (val & ARIZONA_ISRC1_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "ISRC1 underclocked\n");
+ if (val & ARIZONA_FX_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "FX underclocked\n");
+ if (val & ARIZONA_ASRC_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "ASRC underclocked\n");
+ if (val & ARIZONA_DAC_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "DAC underclocked\n");
+ if (val & ARIZONA_ADC_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "ADC underclocked\n");
+ if (val & ARIZONA_MIXER_UNDERCLOCKED_STS)
+ dev_err(arizona->dev, "Mixer underclocked\n");
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t arizona_overclocked(int irq, void *data)
+{
+ struct arizona *arizona = data;
+ unsigned int val[2];
+ int ret;
+
+ ret = regmap_bulk_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_6,
+ &val[0], 2);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read overclock status: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ if (val[0] & ARIZONA_PWM_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "PWM overclocked\n");
+ if (val[0] & ARIZONA_FX_CORE_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "FX core overclocked\n");
+ if (val[0] & ARIZONA_DAC_SYS_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "DAC SYS overclocked\n");
+ if (val[0] & ARIZONA_DAC_WARP_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "DAC WARP overclocked\n");
+ if (val[0] & ARIZONA_ADC_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "ADC overclocked\n");
+ if (val[0] & ARIZONA_MIXER_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "Mixer overclocked\n");
+ if (val[0] & ARIZONA_AIF3_SYNC_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "AIF3 overclocked\n");
+ if (val[0] & ARIZONA_AIF2_SYNC_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "AIF2 overclocked\n");
+ if (val[0] & ARIZONA_AIF1_SYNC_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "AIF1 overclocked\n");
+ if (val[0] & ARIZONA_PAD_CTRL_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "Pad control overclocked\n");
+
+ if (val[1] & ARIZONA_SLIMBUS_SUBSYS_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "Slimbus subsystem overclocked\n");
+ if (val[1] & ARIZONA_SLIMBUS_ASYNC_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "Slimbus async overclocked\n");
+ if (val[1] & ARIZONA_SLIMBUS_SYNC_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "Slimbus sync overclocked\n");
+ if (val[1] & ARIZONA_ASRC_ASYNC_SYS_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "ASRC async system overclocked\n");
+ if (val[1] & ARIZONA_ASRC_ASYNC_WARP_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "ASRC async WARP overclocked\n");
+ if (val[1] & ARIZONA_ASRC_SYNC_SYS_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "ASRC sync system overclocked\n");
+ if (val[1] & ARIZONA_ASRC_SYNC_WARP_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "ASRC sync WARP overclocked\n");
+ if (val[1] & ARIZONA_ADSP2_1_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "DSP1 overclocked\n");
+ if (val[1] & ARIZONA_ISRC2_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "ISRC2 overclocked\n");
+ if (val[1] & ARIZONA_ISRC1_OVERCLOCKED_STS)
+ dev_err(arizona->dev, "ISRC1 overclocked\n");
+
+ return IRQ_HANDLED;
+}
+
+static int arizona_wait_for_boot(struct arizona *arizona)
+{
+ unsigned int reg;
+ int ret, i;
+
+ /*
+ * We can't use an interrupt as we need to runtime resume to do so,
+ * we won't race with the interrupt handler as it'll be blocked on
+ * runtime resume.
+ */
+ for (i = 0; i < 5; i++) {
+ msleep(1);
+
+ ret = regmap_read(arizona->regmap,
+ ARIZONA_INTERRUPT_RAW_STATUS_5, &reg);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read boot state: %d\n",
+ ret);
+ return ret;
+ }
+
+ if (reg & ARIZONA_BOOT_DONE_STS)
+ break;
+ }
+
+ if (reg & ARIZONA_BOOT_DONE_STS) {
+ regmap_write(arizona->regmap, ARIZONA_INTERRUPT_STATUS_5,
+ ARIZONA_BOOT_DONE_STS);
+ } else {
+ dev_err(arizona->dev, "Device boot timed out: %x\n", reg);
+ return -ETIMEDOUT;
+ }
+
+ pm_runtime_mark_last_busy(arizona->dev);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int arizona_runtime_resume(struct device *dev)
+{
+ struct arizona *arizona = dev_get_drvdata(dev);
+ int ret;
+
+ if (arizona->pdata.ldoena)
+ gpio_set_value_cansleep(arizona->pdata.ldoena, 1);
+
+ regcache_cache_only(arizona->regmap, false);
+
+ ret = arizona_wait_for_boot(arizona);
+ if (ret != 0)
+ return ret;
+
+ regcache_sync(arizona->regmap);
+
+ return 0;
+}
+
+static int arizona_runtime_suspend(struct device *dev)
+{
+ struct arizona *arizona = dev_get_drvdata(dev);
+
+ if (arizona->pdata.ldoena) {
+ gpio_set_value_cansleep(arizona->pdata.ldoena, 0);
+ regcache_cache_only(arizona->regmap, true);
+ regcache_mark_dirty(arizona->regmap);
+ }
+
+ return 0;
+}
+#endif
+
+const struct dev_pm_ops arizona_pm_ops = {
+ SET_RUNTIME_PM_OPS(arizona_runtime_suspend,
+ arizona_runtime_resume,
+ NULL)
+};
+EXPORT_SYMBOL_GPL(arizona_pm_ops);
+
+static struct mfd_cell early_devs[] = {
+ { .name = "arizona-ldo1" },
+};
+
+static struct mfd_cell wm5102_devs[] = {
+ { .name = "arizona-extcon" },
+ { .name = "arizona-gpio" },
+ { .name = "arizona-micsupp" },
+ { .name = "arizona-pwm" },
+ { .name = "wm5102-codec" },
+};
+
+int __devinit arizona_dev_init(struct arizona *arizona)
+{
+ struct device *dev = arizona->dev;
+ const char *type_name;
+ unsigned int reg, val;
+ int ret, i;
+
+ dev_set_drvdata(arizona->dev, arizona);
+ mutex_init(&arizona->clk_lock);
+
+ if (dev_get_platdata(arizona->dev))
+ memcpy(&arizona->pdata, dev_get_platdata(arizona->dev),
+ sizeof(arizona->pdata));
+
+ regcache_cache_only(arizona->regmap, true);
+
+ switch (arizona->type) {
+ case WM5102:
+ for (i = 0; i < ARRAY_SIZE(wm5102_core_supplies); i++)
+ arizona->core_supplies[i].supply
+ = wm5102_core_supplies[i];
+ arizona->num_core_supplies = ARRAY_SIZE(wm5102_core_supplies);
+ break;
+ default:
+ dev_err(arizona->dev, "Unknown device type %d\n",
+ arizona->type);
+ return -EINVAL;
+ }
+
+ ret = mfd_add_devices(arizona->dev, -1, early_devs,
+ ARRAY_SIZE(early_devs), NULL, 0);
+ if (ret != 0) {
+ dev_err(dev, "Failed to add early children: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_regulator_bulk_get(dev, arizona->num_core_supplies,
+ arizona->core_supplies);
+ if (ret != 0) {
+ dev_err(dev, "Failed to request core supplies: %d\n",
+ ret);
+ goto err_early;
+ }
+
+ ret = regulator_bulk_enable(arizona->num_core_supplies,
+ arizona->core_supplies);
+ if (ret != 0) {
+ dev_err(dev, "Failed to enable core supplies: %d\n",
+ ret);
+ goto err_early;
+ }
+
+ if (arizona->pdata.reset) {
+ /* Start out with /RESET low to put the chip into reset */
+ ret = gpio_request_one(arizona->pdata.reset,
+ GPIOF_DIR_OUT | GPIOF_INIT_LOW,
+ "arizona /RESET");
+ if (ret != 0) {
+ dev_err(dev, "Failed to request /RESET: %d\n", ret);
+ goto err_enable;
+ }
+
+ gpio_set_value_cansleep(arizona->pdata.reset, 1);
+ }
+
+ if (arizona->pdata.ldoena) {
+ ret = gpio_request_one(arizona->pdata.ldoena,
+ GPIOF_DIR_OUT | GPIOF_INIT_HIGH,
+ "arizona LDOENA");
+ if (ret != 0) {
+ dev_err(dev, "Failed to request LDOENA: %d\n", ret);
+ goto err_reset;
+ }
+ }
+
+ regcache_cache_only(arizona->regmap, false);
+
+ ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);
+ if (ret != 0) {
+ dev_err(dev, "Failed to read ID register: %d\n", ret);
+ goto err_ldoena;
+ }
+
+ ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,
+ &arizona->rev);
+ if (ret != 0) {
+ dev_err(dev, "Failed to read revision register: %d\n", ret);
+ goto err_ldoena;
+ }
+ arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;
+
+ switch (reg) {
+ case 0x5102:
+ type_name = "WM5102";
+ if (arizona->type != WM5102) {
+ dev_err(arizona->dev, "WM5102 registered as %d\n",
+ arizona->type);
+ arizona->type = WM5102;
+ }
+ ret = wm5102_patch(arizona);
+ break;
+
+ default:
+ dev_err(arizona->dev, "Unknown device ID %x\n", reg);
+ goto err_ldoena;
+ }
+
+ dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');
+
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to apply patch: %d\n", ret);
+
+ /* If we have a /RESET GPIO we'll already be reset */
+ if (!arizona->pdata.reset) {
+ ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0);
+ if (ret != 0) {
+ dev_err(dev, "Failed to reset device: %d\n", ret);
+ goto err_ldoena;
+ }
+ }
+
+ arizona_wait_for_boot(arizona);
+
+ for (i = 0; i < ARRAY_SIZE(arizona->pdata.gpio_defaults); i++) {
+ if (!arizona->pdata.gpio_defaults[i])
+ continue;
+
+ regmap_write(arizona->regmap, ARIZONA_GPIO1_CTRL + i,
+ arizona->pdata.gpio_defaults[i]);
+ }
+
+ pm_runtime_set_autosuspend_delay(arizona->dev, 100);
+ pm_runtime_use_autosuspend(arizona->dev);
+ pm_runtime_enable(arizona->dev);
+
+ /* Chip default */
+ if (!arizona->pdata.clk32k_src)
+ arizona->pdata.clk32k_src = ARIZONA_32KZ_MCLK2;
+
+ switch (arizona->pdata.clk32k_src) {
+ case ARIZONA_32KZ_MCLK1:
+ case ARIZONA_32KZ_MCLK2:
+ regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+ ARIZONA_CLK_32K_SRC_MASK,
+ arizona->pdata.clk32k_src - 1);
+ break;
+ case ARIZONA_32KZ_NONE:
+ regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
+ ARIZONA_CLK_32K_SRC_MASK, 2);
+ break;
+ default:
+ dev_err(arizona->dev, "Invalid 32kHz clock source: %d\n",
+ arizona->pdata.clk32k_src);
+ ret = -EINVAL;
+ goto err_ldoena;
+ }
+
+ for (i = 0; i < ARIZONA_MAX_INPUT; i++) {
+ /* Default for both is 0 so noop with defaults */
+ val = arizona->pdata.dmic_ref[i]
+ << ARIZONA_IN1_DMIC_SUP_SHIFT;
+ val |= arizona->pdata.inmode[i] << ARIZONA_IN1_MODE_SHIFT;
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_IN1L_CONTROL + (i * 8),
+ ARIZONA_IN1_DMIC_SUP_MASK |
+ ARIZONA_IN1_MODE_MASK, val);
+ }
+
+ for (i = 0; i < ARIZONA_MAX_OUTPUT; i++) {
+ /* Default is 0 so noop with defaults */
+ if (arizona->pdata.out_mono[i])
+ val = ARIZONA_OUT1_MONO;
+ else
+ val = 0;
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_OUTPUT_PATH_CONFIG_1L + (i * 8),
+ ARIZONA_OUT1_MONO, val);
+ }
+
+ BUILD_BUG_ON(ARIZONA_MAX_PDM_SPK > 1);
+ for (i = 0; i < ARIZONA_MAX_PDM_SPK; i++) {
+ if (arizona->pdata.spk_mute[i])
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_PDM_SPK1_CTRL_1,
+ ARIZONA_SPK1_MUTE_ENDIAN_MASK |
+ ARIZONA_SPK1_MUTE_SEQ1_MASK,
+ arizona->pdata.spk_mute[i]);
+
+ if (arizona->pdata.spk_fmt[i])
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_PDM_SPK1_CTRL_2,
+ ARIZONA_SPK1_FMT_MASK,
+ arizona->pdata.spk_fmt[i]);
+ }
+
+ /* Set up for interrupts */
+ ret = arizona_irq_init(arizona);
+ if (ret != 0)
+ goto err_ldoena;
+
+ arizona_request_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, "CLKGEN error",
+ arizona_clkgen_err, arizona);
+ arizona_request_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, "Overclocked",
+ arizona_overclocked, arizona);
+ arizona_request_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, "Underclocked",
+ arizona_underclocked, arizona);
+
+ switch (arizona->type) {
+ case WM5102:
+ ret = mfd_add_devices(arizona->dev, -1, wm5102_devs,
+ ARRAY_SIZE(wm5102_devs), NULL, 0);
+ break;
+ }
+
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to add subdevices: %d\n", ret);
+ goto err_irq;
+ }
+
+ return 0;
+
+err_irq:
+ arizona_irq_exit(arizona);
+err_ldoena:
+ if (arizona->pdata.ldoena) {
+ gpio_set_value_cansleep(arizona->pdata.ldoena, 0);
+ gpio_free(arizona->pdata.ldoena);
+ }
+err_reset:
+ if (arizona->pdata.reset) {
+ gpio_set_value_cansleep(arizona->pdata.reset, 1);
+ gpio_free(arizona->pdata.reset);
+ }
+err_enable:
+ regulator_bulk_disable(ARRAY_SIZE(arizona->core_supplies),
+ arizona->core_supplies);
+err_early:
+ mfd_remove_devices(dev);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(arizona_dev_init);
+
+int __devexit arizona_dev_exit(struct arizona *arizona)
+{
+ mfd_remove_devices(arizona->dev);
+ arizona_free_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, arizona);
+ arizona_free_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, arizona);
+ arizona_free_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, arizona);
+ pm_runtime_disable(arizona->dev);
+ arizona_irq_exit(arizona);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(arizona_dev_exit);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 06:36:20 +0300