diff options
Diffstat (limited to 'sound/soc/codecs/rt712-sdca-sdw.c')
| -rw-r--r-- | sound/soc/codecs/rt712-sdca-sdw.c | 489 |
1 files changed, 489 insertions, 0 deletions
diff --git a/sound/soc/codecs/rt712-sdca-sdw.c b/sound/soc/codecs/rt712-sdca-sdw.c new file mode 100644 index 0000000000..6b644a89c5 --- /dev/null +++ b/sound/soc/codecs/rt712-sdca-sdw.c @@ -0,0 +1,489 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// rt712-sdca-sdw.c -- rt712 SDCA ALSA SoC audio driver +// +// Copyright(c) 2023 Realtek Semiconductor Corp. +// +// + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/soundwire/sdw_registers.h> +#include "rt712-sdca.h" +#include "rt712-sdca-sdw.h" + +static bool rt712_sdca_readable_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case 0x201a ... 0x201f: + case 0x2029 ... 0x202a: + case 0x202d ... 0x2034: + case 0x2230 ... 0x2232: + case 0x2f01 ... 0x2f0a: + case 0x2f35 ... 0x2f36: + case 0x2f50: + case 0x2f54: + case 0x2f58 ... 0x2f5d: + case 0x3201: + case 0x320c: + case 0x3301 ... 0x3303: + case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_GE49, RT712_SDCA_CTL_SELECTED_MODE, 0): + case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_GE49, RT712_SDCA_CTL_DETECTED_MODE, 0): + case SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_CURRENT_OWNER, 0) ... + SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0): + case RT712_BUF_ADDR_HID1 ... RT712_BUF_ADDR_HID2: + return true; + default: + return false; + } +} + +static bool rt712_sdca_volatile_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case 0x201b: + case 0x201c: + case 0x201d: + case 0x201f: + case 0x202d ... 0x202f: + case 0x2230: + case 0x2f01: + case 0x2f35: + case 0x320c: + case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_GE49, RT712_SDCA_CTL_DETECTED_MODE, 0): + case SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_CURRENT_OWNER, 0) ... + SDW_SDCA_CTL(FUNC_NUM_HID, RT712_SDCA_ENT_HID01, RT712_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0): + case RT712_BUF_ADDR_HID1 ... RT712_BUF_ADDR_HID2: + return true; + default: + return false; + } +} + +static bool rt712_sdca_mbq_readable_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case 0x2000000 ... 0x200008e: + case 0x5300000 ... 0x530000e: + case 0x5400000 ... 0x540000e: + case 0x5600000 ... 0x5600008: + case 0x5700000 ... 0x570000d: + case 0x5800000 ... 0x5800021: + case 0x5900000 ... 0x5900028: + case 0x5a00000 ... 0x5a00009: + case 0x5b00000 ... 0x5b00051: + case 0x5c00000 ... 0x5c0009a: + case 0x5d00000 ... 0x5d00009: + case 0x5f00000 ... 0x5f00030: + case 0x6100000 ... 0x6100068: + case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU05, RT712_SDCA_CTL_FU_VOLUME, CH_L): + case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU05, RT712_SDCA_CTL_FU_VOLUME, CH_R): + case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU0F, RT712_SDCA_CTL_FU_VOLUME, CH_L): + case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT712_SDCA_ENT_USER_FU0F, RT712_SDCA_CTL_FU_VOLUME, CH_R): + case SDW_SDCA_CTL(FUNC_NUM_AMP, RT712_SDCA_ENT_USER_FU06, RT712_SDCA_CTL_FU_VOLUME, CH_L): + case SDW_SDCA_CTL(FUNC_NUM_AMP, RT712_SDCA_ENT_USER_FU06, RT712_SDCA_CTL_FU_VOLUME, CH_R): + return true; + default: + return false; + } +} + +static bool rt712_sdca_mbq_volatile_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case 0x2000000: + case 0x200001a: + case 0x2000024: + case 0x2000046: + case 0x200008a: + case 0x5800000: + case 0x5800001: + case 0x6100008: + return true; + default: + return false; + } +} + +static const struct regmap_config rt712_sdca_regmap = { + .reg_bits = 32, + .val_bits = 8, + .readable_reg = rt712_sdca_readable_register, + .volatile_reg = rt712_sdca_volatile_register, + .max_register = 0x44ffffff, + .reg_defaults = rt712_sdca_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(rt712_sdca_reg_defaults), + .cache_type = REGCACHE_MAPLE, + .use_single_read = true, + .use_single_write = true, +}; + +static const struct regmap_config rt712_sdca_mbq_regmap = { + .name = "sdw-mbq", + .reg_bits = 32, + .val_bits = 16, + .readable_reg = rt712_sdca_mbq_readable_register, + .volatile_reg = rt712_sdca_mbq_volatile_register, + .max_register = 0x41000312, + .reg_defaults = rt712_sdca_mbq_defaults, + .num_reg_defaults = ARRAY_SIZE(rt712_sdca_mbq_defaults), + .cache_type = REGCACHE_MAPLE, + .use_single_read = true, + .use_single_write = true, +}; + +static int rt712_sdca_update_status(struct sdw_slave *slave, + enum sdw_slave_status status) +{ + struct rt712_sdca_priv *rt712 = dev_get_drvdata(&slave->dev); + + if (status == SDW_SLAVE_UNATTACHED) + rt712->hw_init = false; + + if (status == SDW_SLAVE_ATTACHED) { + if (rt712->hs_jack) { + /* + * Due to the SCP_SDCA_INTMASK will be cleared by any reset, and then + * if the device attached again, we will need to set the setting back. + * It could avoid losing the jack detection interrupt. + * This also could sync with the cache value as the rt712_sdca_jack_init set. + */ + sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INTMASK1, + SDW_SCP_SDCA_INTMASK_SDCA_0); + sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INTMASK2, + SDW_SCP_SDCA_INTMASK_SDCA_8); + } + } + + /* + * Perform initialization only if slave status is present and + * hw_init flag is false + */ + if (rt712->hw_init || status != SDW_SLAVE_ATTACHED) + return 0; + + /* perform I/O transfers required for Slave initialization */ + return rt712_sdca_io_init(&slave->dev, slave); +} + +static int rt712_sdca_read_prop(struct sdw_slave *slave) +{ + struct sdw_slave_prop *prop = &slave->prop; + int nval; + int i, j; + u32 bit; + unsigned long addr; + struct sdw_dpn_prop *dpn; + + prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY; + prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY; + + prop->paging_support = true; + + /* first we need to allocate memory for set bits in port lists */ + prop->source_ports = BIT(4); /* BITMAP: 00010000 */ + prop->sink_ports = BIT(3) | BIT(1); /* BITMAP: 00001010 */ + + nval = hweight32(prop->source_ports); + prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval, + sizeof(*prop->src_dpn_prop), GFP_KERNEL); + if (!prop->src_dpn_prop) + return -ENOMEM; + + i = 0; + dpn = prop->src_dpn_prop; + addr = prop->source_ports; + for_each_set_bit(bit, &addr, 32) { + dpn[i].num = bit; + dpn[i].type = SDW_DPN_FULL; + dpn[i].simple_ch_prep_sm = true; + dpn[i].ch_prep_timeout = 10; + i++; + } + + /* do this again for sink now */ + nval = hweight32(prop->sink_ports); + prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval, + sizeof(*prop->sink_dpn_prop), GFP_KERNEL); + if (!prop->sink_dpn_prop) + return -ENOMEM; + + j = 0; + dpn = prop->sink_dpn_prop; + addr = prop->sink_ports; + for_each_set_bit(bit, &addr, 32) { + dpn[j].num = bit; + dpn[j].type = SDW_DPN_FULL; + dpn[j].simple_ch_prep_sm = true; + dpn[j].ch_prep_timeout = 10; + j++; + } + + /* set the timeout values */ + prop->clk_stop_timeout = 1380; + + /* wake-up event */ + prop->wake_capable = 1; + + return 0; +} + +static int rt712_sdca_interrupt_callback(struct sdw_slave *slave, + struct sdw_slave_intr_status *status) +{ + struct rt712_sdca_priv *rt712 = dev_get_drvdata(&slave->dev); + int ret, stat; + int count = 0, retry = 3; + unsigned int sdca_cascade, scp_sdca_stat1, scp_sdca_stat2 = 0; + + dev_dbg(&slave->dev, + "%s control_port_stat=%x, sdca_cascade=%x", __func__, + status->control_port, status->sdca_cascade); + + if (cancel_delayed_work_sync(&rt712->jack_detect_work)) { + dev_warn(&slave->dev, "%s the pending delayed_work was cancelled", __func__); + /* avoid the HID owner doesn't change to device */ + if (rt712->scp_sdca_stat2) + scp_sdca_stat2 = rt712->scp_sdca_stat2; + } + + /* + * The critical section below intentionally protects a rather large piece of code. + * We don't want to allow the system suspend to disable an interrupt while we are + * processing it, which could be problematic given the quirky SoundWire interrupt + * scheme. We do want however to prevent new workqueues from being scheduled if + * the disable_irq flag was set during system suspend. + */ + mutex_lock(&rt712->disable_irq_lock); + + ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT1); + if (ret < 0) + goto io_error; + rt712->scp_sdca_stat1 = ret; + ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT2); + if (ret < 0) + goto io_error; + rt712->scp_sdca_stat2 = ret; + if (scp_sdca_stat2) + rt712->scp_sdca_stat2 |= scp_sdca_stat2; + + do { + /* clear flag */ + ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT1); + if (ret < 0) + goto io_error; + if (ret & SDW_SCP_SDCA_INTMASK_SDCA_0) { + ret = sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INT1, + SDW_SCP_SDCA_INTMASK_SDCA_0); + if (ret < 0) + goto io_error; + } + ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT2); + if (ret < 0) + goto io_error; + if (ret & SDW_SCP_SDCA_INTMASK_SDCA_8) { + ret = sdw_write_no_pm(rt712->slave, SDW_SCP_SDCA_INT2, + SDW_SCP_SDCA_INTMASK_SDCA_8); + if (ret < 0) + goto io_error; + } + + /* check if flag clear or not */ + ret = sdw_read_no_pm(rt712->slave, SDW_DP0_INT); + if (ret < 0) + goto io_error; + sdca_cascade = ret & SDW_DP0_SDCA_CASCADE; + + ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT1); + if (ret < 0) + goto io_error; + scp_sdca_stat1 = ret & SDW_SCP_SDCA_INTMASK_SDCA_0; + + ret = sdw_read_no_pm(rt712->slave, SDW_SCP_SDCA_INT2); + if (ret < 0) + goto io_error; + scp_sdca_stat2 = ret & SDW_SCP_SDCA_INTMASK_SDCA_8; + + stat = scp_sdca_stat1 || scp_sdca_stat2 || sdca_cascade; + + count++; + } while (stat != 0 && count < retry); + + if (stat) + dev_warn(&slave->dev, + "%s scp_sdca_stat1=0x%x, scp_sdca_stat2=0x%x\n", __func__, + rt712->scp_sdca_stat1, rt712->scp_sdca_stat2); + + if (status->sdca_cascade && !rt712->disable_irq) + mod_delayed_work(system_power_efficient_wq, + &rt712->jack_detect_work, msecs_to_jiffies(30)); + + mutex_unlock(&rt712->disable_irq_lock); + + return 0; + +io_error: + mutex_unlock(&rt712->disable_irq_lock); + pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret); + return ret; +} + +static struct sdw_slave_ops rt712_sdca_slave_ops = { + .read_prop = rt712_sdca_read_prop, + .interrupt_callback = rt712_sdca_interrupt_callback, + .update_status = rt712_sdca_update_status, +}; + +static int rt712_sdca_sdw_probe(struct sdw_slave *slave, + const struct sdw_device_id *id) +{ + struct regmap *regmap, *mbq_regmap; + + /* Regmap Initialization */ + mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt712_sdca_mbq_regmap); + if (IS_ERR(mbq_regmap)) + return PTR_ERR(mbq_regmap); + + regmap = devm_regmap_init_sdw(slave, &rt712_sdca_regmap); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return rt712_sdca_init(&slave->dev, regmap, mbq_regmap, slave); +} + +static int rt712_sdca_sdw_remove(struct sdw_slave *slave) +{ + struct rt712_sdca_priv *rt712 = dev_get_drvdata(&slave->dev); + + if (rt712->hw_init) { + cancel_delayed_work_sync(&rt712->jack_detect_work); + cancel_delayed_work_sync(&rt712->jack_btn_check_work); + } + + pm_runtime_disable(&slave->dev); + + mutex_destroy(&rt712->calibrate_mutex); + mutex_destroy(&rt712->disable_irq_lock); + + return 0; +} + +static const struct sdw_device_id rt712_sdca_id[] = { + SDW_SLAVE_ENTRY_EXT(0x025d, 0x712, 0x3, 0x1, 0), + SDW_SLAVE_ENTRY_EXT(0x025d, 0x713, 0x3, 0x1, 0), + SDW_SLAVE_ENTRY_EXT(0x025d, 0x716, 0x3, 0x1, 0), + SDW_SLAVE_ENTRY_EXT(0x025d, 0x717, 0x3, 0x1, 0), + {}, +}; +MODULE_DEVICE_TABLE(sdw, rt712_sdca_id); + +static int __maybe_unused rt712_sdca_dev_suspend(struct device *dev) +{ + struct rt712_sdca_priv *rt712 = dev_get_drvdata(dev); + + if (!rt712->hw_init) + return 0; + + cancel_delayed_work_sync(&rt712->jack_detect_work); + cancel_delayed_work_sync(&rt712->jack_btn_check_work); + + regcache_cache_only(rt712->regmap, true); + regcache_cache_only(rt712->mbq_regmap, true); + + return 0; +} + +static int __maybe_unused rt712_sdca_dev_system_suspend(struct device *dev) +{ + struct rt712_sdca_priv *rt712_sdca = dev_get_drvdata(dev); + struct sdw_slave *slave = dev_to_sdw_dev(dev); + int ret1, ret2; + + if (!rt712_sdca->hw_init) + return 0; + + /* + * prevent new interrupts from being handled after the + * deferred work completes and before the parent disables + * interrupts on the link + */ + mutex_lock(&rt712_sdca->disable_irq_lock); + rt712_sdca->disable_irq = true; + ret1 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK1, + SDW_SCP_SDCA_INTMASK_SDCA_0, 0); + ret2 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK2, + SDW_SCP_SDCA_INTMASK_SDCA_8, 0); + mutex_unlock(&rt712_sdca->disable_irq_lock); + + if (ret1 < 0 || ret2 < 0) { + /* log but don't prevent suspend from happening */ + dev_dbg(&slave->dev, "%s: could not disable SDCA interrupts\n:", __func__); + } + + return rt712_sdca_dev_suspend(dev); +} + +#define RT712_PROBE_TIMEOUT 5000 + +static int __maybe_unused rt712_sdca_dev_resume(struct device *dev) +{ + struct sdw_slave *slave = dev_to_sdw_dev(dev); + struct rt712_sdca_priv *rt712 = dev_get_drvdata(dev); + unsigned long time; + + if (!rt712->first_hw_init) + return 0; + + if (!slave->unattach_request) { + if (rt712->disable_irq == true) { + mutex_lock(&rt712->disable_irq_lock); + sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK1, SDW_SCP_SDCA_INTMASK_SDCA_0); + sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK2, SDW_SCP_SDCA_INTMASK_SDCA_8); + rt712->disable_irq = false; + mutex_unlock(&rt712->disable_irq_lock); + } + goto regmap_sync; + } + + time = wait_for_completion_timeout(&slave->initialization_complete, + msecs_to_jiffies(RT712_PROBE_TIMEOUT)); + if (!time) { + dev_err(&slave->dev, "Initialization not complete, timed out\n"); + sdw_show_ping_status(slave->bus, true); + + return -ETIMEDOUT; + } + +regmap_sync: + slave->unattach_request = 0; + regcache_cache_only(rt712->regmap, false); + regcache_sync(rt712->regmap); + regcache_cache_only(rt712->mbq_regmap, false); + regcache_sync(rt712->mbq_regmap); + return 0; +} + +static const struct dev_pm_ops rt712_sdca_pm = { + SET_SYSTEM_SLEEP_PM_OPS(rt712_sdca_dev_system_suspend, rt712_sdca_dev_resume) + SET_RUNTIME_PM_OPS(rt712_sdca_dev_suspend, rt712_sdca_dev_resume, NULL) +}; + +static struct sdw_driver rt712_sdca_sdw_driver = { + .driver = { + .name = "rt712-sdca", + .owner = THIS_MODULE, + .pm = &rt712_sdca_pm, + }, + .probe = rt712_sdca_sdw_probe, + .remove = rt712_sdca_sdw_remove, + .ops = &rt712_sdca_slave_ops, + .id_table = rt712_sdca_id, +}; +module_sdw_driver(rt712_sdca_sdw_driver); + +MODULE_DESCRIPTION("ASoC RT712 SDCA SDW driver"); +MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>"); +MODULE_LICENSE("GPL"); |