From: Ben Zhang benzh@chromium.org
The rt5677 jack detection function has a requirement that the polarity of an interrupt be flipped after it fires in order to clear the interrupt.
This patch implements an irq_chip with irq_domain directly instead of using regmap-irq, so that interrupt source line polarities can be flipped in the irq handler.
The reason that this patch does not add this feature within regmap-irq is that future patches will add hotword detection support to this irq handler. Those patches will require adding additional logic that would not make sense to have in regmap-irq.
Signed-off-by: Ben Zhang benzh@chromium.org Signed-off-by: Fletcher Woodruff fletcherw@chromium.org --- sound/soc/codecs/rt5677.c | 170 ++++++++++++++++++++++++++++++-------- sound/soc/codecs/rt5677.h | 7 +- 2 files changed, 143 insertions(+), 34 deletions(-)
diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c index 87a92ba0d040b7..87466ee222ee59 100644 --- a/sound/soc/codecs/rt5677.c +++ b/sound/soc/codecs/rt5677.c @@ -23,6 +23,10 @@ #include <linux/firmware.h> #include <linux/of_device.h> #include <linux/property.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/workqueue.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -4620,7 +4624,6 @@ static void rt5677_gpio_config(struct rt5677_priv *rt5677, unsigned offset, static int rt5677_to_irq(struct gpio_chip *chip, unsigned offset) { struct rt5677_priv *rt5677 = gpiochip_get_data(chip); - struct regmap_irq_chip_data *data = rt5677->irq_data; int irq;
if ((rt5677->pdata.jd1_gpio == 1 && offset == RT5677_GPIO1) || @@ -4646,7 +4649,7 @@ static int rt5677_to_irq(struct gpio_chip *chip, unsigned offset) return -ENXIO; }
- return regmap_irq_get_virq(data, irq); + return irq_create_mapping(rt5677->domain, irq); }
static const struct gpio_chip rt5677_template_chip = { @@ -5042,30 +5045,130 @@ static void rt5677_read_device_properties(struct rt5677_priv *rt5677, rt5677->pdata.jd3_gpio = val; }
-static struct regmap_irq rt5677_irqs[] = { +struct rt5677_irq_desc { + unsigned int enable_mask; + unsigned int status_mask; + unsigned int polarity_mask; +}; + +static const struct rt5677_irq_desc rt5677_irq_descs[] = { [RT5677_IRQ_JD1] = { - .reg_offset = 0, - .mask = RT5677_EN_IRQ_GPIO_JD1, + .enable_mask = RT5677_EN_IRQ_GPIO_JD1, + .status_mask = RT5677_STA_GPIO_JD1, + .polarity_mask = RT5677_INV_GPIO_JD1, }, [RT5677_IRQ_JD2] = { - .reg_offset = 0, - .mask = RT5677_EN_IRQ_GPIO_JD2, + .enable_mask = RT5677_EN_IRQ_GPIO_JD2, + .status_mask = RT5677_STA_GPIO_JD2, + .polarity_mask = RT5677_INV_GPIO_JD2, }, [RT5677_IRQ_JD3] = { - .reg_offset = 0, - .mask = RT5677_EN_IRQ_GPIO_JD3, + .enable_mask = RT5677_EN_IRQ_GPIO_JD3, + .status_mask = RT5677_STA_GPIO_JD3, + .polarity_mask = RT5677_INV_GPIO_JD3, }, };
-static struct regmap_irq_chip rt5677_irq_chip = { - .name = RT5677_DRV_NAME, - .irqs = rt5677_irqs, - .num_irqs = ARRAY_SIZE(rt5677_irqs), +static irqreturn_t rt5677_irq(int unused, void *data) +{ + struct rt5677_priv *rt5677 = data; + int ret = 0, i, reg_irq, virq; + bool irq_fired = false; + + mutex_lock(&rt5677->irq_lock); + /* Read interrupt status */ + ret = regmap_read(rt5677->regmap, RT5677_IRQ_CTRL1, ®_irq); + if (ret) { + pr_err("rt5677: failed reading IRQ status: %d\n", ret); + goto exit; + } + + for (i = 0; i < RT5677_IRQ_NUM; i++) { + if (reg_irq & rt5677_irq_descs[i].status_mask) { + irq_fired = true; + virq = irq_find_mapping(rt5677->domain, i); + if (virq) + handle_nested_irq(virq); + + /* Clear the interrupt by flipping the polarity of the + * interrupt source line that fired + */ + reg_irq ^= rt5677_irq_descs[i].polarity_mask; + } + } + + if (!irq_fired) + goto exit; + + ret = regmap_write(rt5677->regmap, RT5677_IRQ_CTRL1, reg_irq); + if (ret) { + pr_err("rt5677: failed updating IRQ status: %d\n", ret); + goto exit; + } +exit: + mutex_unlock(&rt5677->irq_lock); + if (irq_fired) + return IRQ_HANDLED; + else + return IRQ_NONE; +}
- .num_regs = 1, - .status_base = RT5677_IRQ_CTRL1, - .mask_base = RT5677_IRQ_CTRL1, - .mask_invert = 1, +static void rt5677_irq_bus_lock(struct irq_data *data) +{ + struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data); + + mutex_lock(&rt5677->irq_lock); +} + +static void rt5677_irq_bus_sync_unlock(struct irq_data *data) +{ + struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data); + + // Set the enable/disable bits for the jack detect IRQs. + regmap_update_bits(rt5677->regmap, RT5677_IRQ_CTRL1, + RT5677_EN_IRQ_GPIO_JD1 | RT5677_EN_IRQ_GPIO_JD2 | + RT5677_EN_IRQ_GPIO_JD3, rt5677->irq_en); + mutex_unlock(&rt5677->irq_lock); +} + +static void rt5677_irq_enable(struct irq_data *data) +{ + struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data); + + rt5677->irq_en |= rt5677_irq_descs[data->hwirq].enable_mask; +} + +static void rt5677_irq_disable(struct irq_data *data) +{ + struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data); + + rt5677->irq_en &= ~rt5677_irq_descs[data->hwirq].enable_mask; +} + +static struct irq_chip rt5677_irq_chip = { + .name = "rt5677_irq_chip", + .irq_bus_lock = rt5677_irq_bus_lock, + .irq_bus_sync_unlock = rt5677_irq_bus_sync_unlock, + .irq_disable = rt5677_irq_disable, + .irq_enable = rt5677_irq_enable, +}; + +static int rt5677_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct rt5677_priv *rt5677 = h->host_data; + + irq_set_chip_data(virq, rt5677); + irq_set_chip(virq, &rt5677_irq_chip); + irq_set_nested_thread(virq, 1); + irq_set_noprobe(virq); + return 0; +} + + +static const struct irq_domain_ops rt5677_domain_ops = { + .map = rt5677_irq_map, + .xlate = irq_domain_xlate_twocell, };
static int rt5677_init_irq(struct i2c_client *i2c) @@ -5084,6 +5187,8 @@ static int rt5677_init_irq(struct i2c_client *i2c) return -EINVAL; }
+ mutex_init(&rt5677->irq_lock); + /* * Select RC as the debounce clock so that GPIO works even when * MCLK is gated which happens when there is no audio stream @@ -5092,7 +5197,6 @@ static int rt5677_init_irq(struct i2c_client *i2c) regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC, RT5677_IRQ_DEBOUNCE_SEL_MASK, RT5677_IRQ_DEBOUNCE_SEL_RC); - /* Enable auto power on RC when GPIO states are changed */ regmap_update_bits(rt5677->regmap, RT5677_GEN_CTRL1, 0xff, 0xff);
@@ -5115,26 +5219,25 @@ static int rt5677_init_irq(struct i2c_client *i2c) regmap_update_bits(rt5677->regmap, RT5677_GPIO_CTRL1, RT5677_GPIO1_PIN_MASK, RT5677_GPIO1_PIN_IRQ);
- ret = regmap_add_irq_chip(rt5677->regmap, i2c->irq, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0, - &rt5677_irq_chip, &rt5677->irq_data); + /* Ready to listen for interrupts */ + rt5677->domain = irq_domain_add_linear(i2c->dev.of_node, + RT5677_IRQ_NUM, &rt5677_domain_ops, rt5677); + if (!rt5677->domain) { + dev_err(&i2c->dev, "Failed to create IRQ domain\n"); + return -ENOMEM; + }
- if (ret != 0) { - dev_err(&i2c->dev, "Failed to register IRQ chip: %d\n", ret); + ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, rt5677_irq, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "rt5677", rt5677); + if (ret) { + dev_err(&i2c->dev, "Failed to request IRQ: %d\n", ret); return ret; }
return 0; }
-static void rt5677_free_irq(struct i2c_client *i2c) -{ - struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c); - - if (rt5677->irq_data) - regmap_del_irq_chip(i2c->irq, rt5677->irq_data); -} - static int rt5677_i2c_probe(struct i2c_client *i2c) { struct rt5677_priv *rt5677; @@ -5259,7 +5362,9 @@ static int rt5677_i2c_probe(struct i2c_client *i2c) RT5677_MICBIAS1_CTRL_VDD_3_3V);
rt5677_init_gpio(i2c); - rt5677_init_irq(i2c); + ret = rt5677_init_irq(i2c); + if (ret) + dev_err(&i2c->dev, "Failed to initialize irq: %d\n", ret);
return devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_rt5677, @@ -5268,7 +5373,6 @@ static int rt5677_i2c_probe(struct i2c_client *i2c)
static int rt5677_i2c_remove(struct i2c_client *i2c) { - rt5677_free_irq(i2c); rt5677_free_gpio(i2c);
return 0; diff --git a/sound/soc/codecs/rt5677.h b/sound/soc/codecs/rt5677.h index c26edd387e340b..d0ac26e562eb5f 100644 --- a/sound/soc/codecs/rt5677.h +++ b/sound/soc/codecs/rt5677.h @@ -1749,6 +1749,7 @@ enum { RT5677_IRQ_JD1, RT5677_IRQ_JD2, RT5677_IRQ_JD3, + RT5677_IRQ_NUM, };
enum rt5677_type { @@ -1847,9 +1848,13 @@ struct rt5677_priv { struct gpio_chip gpio_chip; #endif bool dsp_vad_en; - struct regmap_irq_chip_data *irq_data; bool is_dsp_mode; bool is_vref_slow; + + /* Interrupt handling */ + struct irq_domain *domain; + struct mutex irq_lock; + unsigned int irq_en; };
int rt5677_sel_asrc_clk_src(struct snd_soc_component *component,