// SPDX-License-Identifier: GPL-2.0 /* * Maxim Quad GMSL2/GMSL1 to CSI-2 Deserializer driver * * Copyright (C) 2023 Rockchip Electronics Co., Ltd. * * Author: Cai Wenzhong * * V2.00.00 maxim serdes quad GMSL2/GMSL1 driver framework. * 1. local deserializer support: max96712/max96722 * 2. remote serializer support: max9295/max96715/max96717 * 3. support deserializer and serializer auto adaptive * 4. support deserializer output test pattern * 5. support remote serializer I2c address mapping * 6. support remote serializer hot plug detection and recovery * * V2.01.00 * 1. remote device and local link are bound through link id * 2. support local and remote port chain check * 3. drivers/media/i2c/maxim4c/Kconfig support menu select * 4. optimize delay time and error messages * 5. power control: local by pwdn gpio, remote by pocen gpio * 6. local pwdn on/off enable depend on MAXIM4C_LOCAL_DES_ON_OFF_EN * * V2.02.00 * 1. Force all MIPI clocks running Setting in csi out enable. * 2. Pattern mode force_clock_out_en default enable. * * V2.03.00 * 1. remote device add the maxim4c prefix to driver name. * * V2.04.04 * 1. Add regulator supplier dependencies. * 2. Add config ssc-ratio property * 3. Add debugfs entry to change MIPI timing * 4. Use PM runtime autosuspend feature * 5. Fix unbalanced disabling for PoC regulator * 6. MIPI VC count does not affected by data lane count * * V2.05.00 * 1. local device power on add some delay for i2c normal access. * 2. enable hot plug detect for partial links are locked. * 3. remote device hot plug init disable lock irq. * * V3.00.00 * 1. deserializer and serializer are associated through i2c-mux * 2. remote serializer is abstracted as v4l2 subdev * 3. remote camera is bound to remote serializer * * V3.01.00 * 1. fixed remote camera s_stream and s_power api return error. * 2. compatible with kernel v4.19/v5.10/v6.1 * * V3.02.00 * 1. support remote dummy sensor * 2. record the status of the serializer * 3. remote serializer support more chip id * 4. support mode add crop rect dts config * * V3.03.00 * 1. remote sensor Makefile rename module ko * 2. remote sensor rename driver name * * V3.04.00 * 1. fix g_mbus_config flag setting error for ISP * 2. support remote raw sensor s_power and s_stream control by cif * 3. support vicap multi channel to multi ISP mode * * V3.05.00 * 1. unified use __v4l2_ctrl_handler_setup in the xxx_start_stream * 2. support subscribe hot plug detect v4l2 event * * V3.06.00 * 1. support multi-channel information configuration * 2. mode vc initialization when vc-array isn't configured * 3. fix the issue of mutex deadlock during hot plug * * V3.07.00 * 1. v4l2 ioctl add command to support quick stream setting * 2. dev_pm_ops add suspend and resume for system sleep * * V3.08.00 * 1. wait link lock stable when hot plug is detected * 2. link get lock state retry if i2c error * * V3.09.00 * 1. if remote camera not connected, hot plug state check timer working, * fix the issue of mutex deadlock when stream off. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "maxim4c_api.h" #define DRIVER_VERSION KERNEL_VERSION(3, 0x09, 0x00) #define MAXIM4C_NAME "maxim4c" #define MAXIM4C_XVCLK_FREQ 25000000 static const char *const maxim4c_supply_names[MAXIM4C_NUM_SUPPLIES] = { "vcc1v2", "vcc1v8", }; static int maxim4c_check_local_chipid(maxim4c_t *maxim4c) { struct i2c_client *client = maxim4c->client; struct device *dev = &client->dev; int ret = 0, loop = 0; u8 chipid = 0; for (loop = 0; loop < 5; loop++) { if (loop != 0) { dev_info(dev, "check local chipid retry (%d)", loop); msleep(10); } ret = maxim4c_i2c_read_reg(client, MAXIM4C_REG_CHIP_ID, &chipid); if (ret == 0) { if (chipid == maxim4c->chipid) { if (chipid == MAX96712_CHIP_ID) { dev_info(dev, "MAX96712 is Detected\n"); return 0; } if (chipid == MAX96722_CHIP_ID) { dev_info(dev, "MAX96722 is Detected\n"); return 0; } } else { // if chipid is unexpected, retry dev_err(dev, "Unexpected maxim chipid = %02x\n", chipid); } } } dev_err(dev, "maxim check chipid error, ret(%d)\n", ret); return -ENODEV; } static void maxim4c_hot_plug_event_report(maxim4c_t *maxim4c, int data) { struct v4l2_subdev *sd = &maxim4c->subdev; struct device *dev = &maxim4c->client->dev; struct v4l2_event evt_hot_plug = { .type = V4L2_EVENT_HOT_PLUG, .u.data[0] = data, }; dev_dbg(dev, "%s data %d\n", __func__, data); v4l2_event_queue(sd->devnode, &evt_hot_plug); } static irqreturn_t maxim4c_hot_plug_detect_irq_handler(int irq, void *dev_id) { maxim4c_t *maxim4c = dev_id; struct device *dev = &maxim4c->client->dev; int lock_gpio_level = 0; mutex_lock(&maxim4c->mutex); if (maxim4c->streaming == 0) { mutex_unlock(&maxim4c->mutex); return IRQ_HANDLED; } lock_gpio_level = gpiod_get_value_cansleep(maxim4c->lock_gpio); if (lock_gpio_level == 0) { dev_info(dev, "serializer hot plug out\n"); maxim4c->hot_plug_state = MAXIM4C_HOT_PLUG_OUT; } else { dev_info(dev, "serializer hot plug in\n"); maxim4c->hot_plug_state = MAXIM4C_HOT_PLUG_IN; } mutex_unlock(&maxim4c->mutex); queue_delayed_work(maxim4c->hot_plug_work.state_check_wq, &maxim4c->hot_plug_work.state_d_work, msecs_to_jiffies(100)); return IRQ_HANDLED; } static void maxim4c_lock_irq_init(maxim4c_t *maxim4c) { struct device *dev = &maxim4c->client->dev; int ret = 0; if (!IS_ERR(maxim4c->lock_gpio)) { maxim4c->hot_plug_irq = gpiod_to_irq(maxim4c->lock_gpio); if (maxim4c->hot_plug_irq < 0) { dev_err(dev, "failed to get hot plug irq\n"); } else { ret = devm_request_threaded_irq(dev, maxim4c->hot_plug_irq, NULL, maxim4c_hot_plug_detect_irq_handler, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "maxim4c_hot_plug", maxim4c); if (ret) { dev_err(dev, "failed to request hot plug irq (%d)\n", ret); maxim4c->hot_plug_irq = -1; } else { disable_irq(maxim4c->hot_plug_irq); } } } } static void maxim4c_hot_plug_state_check_work(struct work_struct *work) { struct maxim4c_hot_plug_work *hot_plug_work = container_of(work, struct maxim4c_hot_plug_work, state_d_work.work); maxim4c_t *maxim4c = container_of(hot_plug_work, struct maxim4c, hot_plug_work); struct device *dev = &maxim4c->client->dev; u8 curr_lock_state = 0, retry_lock_state = 0, last_lock_state = 0, link_lock_change = 0; u8 link_enable_mask = 0, link_id = 0; dev_dbg(dev, "%s\n", __func__); mutex_lock(&maxim4c->mutex); if (maxim4c->streaming == 0) { mutex_unlock(&maxim4c->mutex); return; } link_enable_mask = maxim4c->gmsl_link.link_enable_mask; last_lock_state = maxim4c->link_lock_state; if ((maxim4c->hot_plug_state == MAXIM4C_HOT_PLUG_OUT) && (last_lock_state == link_enable_mask)) { // i2c mux enable: disable all remote channel dev_info(dev, "disable all remote channel\n"); maxim4c_i2c_mux_enable(maxim4c, 0x00); } curr_lock_state = maxim4c_link_get_lock_state(maxim4c, link_enable_mask); // Link lock state maybe detect error when hot plug, first check i2c io status if (curr_lock_state != last_lock_state) { // delay 100ms for link lock stable usleep_range(100000, 110000); retry_lock_state = maxim4c_link_get_lock_state(maxim4c, link_enable_mask); if (retry_lock_state != curr_lock_state) { dev_info(dev, "link lock retry: 0x%02x -> 0x%02x\n", curr_lock_state, retry_lock_state); curr_lock_state = retry_lock_state; } } link_lock_change = (last_lock_state ^ curr_lock_state); if (link_lock_change) { dev_info(dev, "lock state: current = 0x%02x, last = 0x%02x\n", curr_lock_state, last_lock_state); maxim4c_hot_plug_event_report(maxim4c, curr_lock_state); maxim4c->link_lock_state = curr_lock_state; } mutex_unlock(&maxim4c->mutex); if (link_lock_change & MAXIM4C_LINK_MASK_A) { link_id = MAXIM4C_LINK_ID_A; if (curr_lock_state & MAXIM4C_LINK_MASK_A) { dev_info(dev, "Link A plug in\n"); if (maxim4c->hot_plug_irq > 0) disable_irq(maxim4c->hot_plug_irq); // Link A remote device start stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_A, 1); if (maxim4c->hot_plug_irq > 0) enable_irq(maxim4c->hot_plug_irq); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true); } else { dev_info(dev, "Link A plug out\n"); // Link A remote device stop stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_A, 0); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false); } } if (link_lock_change & MAXIM4C_LINK_MASK_B) { link_id = MAXIM4C_LINK_ID_B; if (curr_lock_state & MAXIM4C_LINK_MASK_B) { dev_info(dev, "Link B plug in\n"); if (maxim4c->hot_plug_irq > 0) disable_irq(maxim4c->hot_plug_irq); // Link B remote device start stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_B, 1); if (maxim4c->hot_plug_irq > 0) enable_irq(maxim4c->hot_plug_irq); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true); } else { dev_info(dev, "Link B plug out\n"); // Link B remote device stop stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_B, 0); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false); } } if (link_lock_change & MAXIM4C_LINK_MASK_C) { link_id = MAXIM4C_LINK_ID_C; if (curr_lock_state & MAXIM4C_LINK_MASK_C) { dev_info(dev, "Link C plug in\n"); if (maxim4c->hot_plug_irq > 0) disable_irq(maxim4c->hot_plug_irq); // Link C remote device start stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_C, 1); if (maxim4c->hot_plug_irq > 0) enable_irq(maxim4c->hot_plug_irq); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true); } else { dev_info(dev, "Link C plug out\n"); // Link C remote device stop stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_C, 0); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false); } } if (link_lock_change & MAXIM4C_LINK_MASK_D) { link_id = MAXIM4C_LINK_ID_D; if (curr_lock_state & MAXIM4C_LINK_MASK_D) { dev_info(dev, "Link D plug in\n"); if (maxim4c->hot_plug_irq > 0) disable_irq(maxim4c->hot_plug_irq); // Link D remote device start stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_D, 1); if (maxim4c->hot_plug_irq > 0) enable_irq(maxim4c->hot_plug_irq); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, true); } else { dev_info(dev, "Link D plug out\n"); // Link D remote device stop stream maxim4c_remote_devices_s_stream(maxim4c, MAXIM4C_LINK_MASK_D, 0); maxim4c_video_pipe_linkid_enable(maxim4c, link_id, false); } } if (curr_lock_state == link_enable_mask) { // i2c mux enable: enable all enabled link for remote control maxim4c_i2c_mux_enable(maxim4c, link_enable_mask); } else { queue_delayed_work(maxim4c->hot_plug_work.state_check_wq, &maxim4c->hot_plug_work.state_d_work, msecs_to_jiffies(200)); } } int maxim4c_hot_plug_detect_work_start(maxim4c_t *maxim4c) { struct device *dev = &maxim4c->client->dev; u8 link_lock_state = 0, link_enable_mask = 0; link_lock_state = maxim4c->link_lock_state; link_enable_mask = maxim4c->gmsl_link.link_enable_mask; if (link_lock_state != link_enable_mask) { dev_info(dev, "%s: link_lock = 0x%02x, link_mask = 0x%02x\n", __func__, link_lock_state, link_enable_mask); maxim4c->hot_plug_state = MAXIM4C_HOT_PLUG_OUT; queue_delayed_work(maxim4c->hot_plug_work.state_check_wq, &maxim4c->hot_plug_work.state_d_work, msecs_to_jiffies(200)); } return 0; } static int maxim4c_lock_state_work_init(maxim4c_t *maxim4c) { struct device *dev = &maxim4c->client->dev; INIT_DELAYED_WORK(&maxim4c->hot_plug_work.state_d_work, maxim4c_hot_plug_state_check_work); maxim4c->hot_plug_work.state_check_wq = create_singlethread_workqueue("maxim4c work queue"); if (maxim4c->hot_plug_work.state_check_wq == NULL) { dev_err(dev, "failed to create hot plug work queue\n"); return -ENOMEM; } return 0; } static int maxim4c_lock_state_work_deinit(maxim4c_t *maxim4c) { if (maxim4c->hot_plug_work.state_check_wq) { cancel_delayed_work_sync(&maxim4c->hot_plug_work.state_d_work); destroy_workqueue(maxim4c->hot_plug_work.state_check_wq); maxim4c->hot_plug_work.state_check_wq = NULL; } return 0; } /* Calculate the delay in us by clock rate and clock cycles */ static inline u32 maxim4c_cal_delay(u32 cycles) { return DIV_ROUND_UP(cycles, MAXIM4C_XVCLK_FREQ / 1000 / 1000); } static int maxim4c_device_power_on(maxim4c_t *maxim4c) { struct device *dev = &maxim4c->client->dev; int ret = 0; ret = regulator_bulk_enable(MAXIM4C_NUM_SUPPLIES, maxim4c->supplies); if (ret < 0) { dev_err(dev, "Failed to enable regulators\n"); return -EINVAL; } ret = regulator_enable(maxim4c->pwdn_regulator); if (ret < 0) { dev_err(dev, "Unable to turn pwdn regulator on\n"); return ret; } return 0; } static void maxim4c_device_power_off(maxim4c_t *maxim4c) { struct device *dev = &maxim4c->client->dev; int ret = 0; ret = regulator_disable(maxim4c->pwdn_regulator); if (ret < 0) dev_warn(dev, "Unable to turn pwdn regulator off\n"); ret = regulator_bulk_disable(MAXIM4C_NUM_SUPPLIES, maxim4c->supplies); if (ret < 0) { dev_warn(dev, "Failed to disable regulators\n"); } } static int maxim4c_runtime_resume(struct device *dev) { #if MAXIM4C_LOCAL_DES_ON_OFF_EN struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim4c_t *maxim4c = v4l2_get_subdevdata(sd); int ret = 0; ret |= maxim4c_device_power_on(maxim4c); return ret; #else return 0; #endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */ } static int maxim4c_runtime_suspend(struct device *dev) { #if MAXIM4C_LOCAL_DES_ON_OFF_EN struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim4c_t *maxim4c = v4l2_get_subdevdata(sd); int ret = 0; maxim4c_device_power_off(maxim4c); return ret; #else return 0; #endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */ } static int __maybe_unused maxim4c_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim4c_t *maxim4c = v4l2_get_subdevdata(sd); int ret = 0; dev_info(dev, "maxim4c resume\n"); #if (MAXIM4C_LOCAL_DES_ON_OFF_EN == 0) #if MAXIM4C_TEST_PATTERN ret = maxim4c_pattern_hw_init(maxim4c); if (ret) { dev_err(dev, "test pattern hw init error\n"); return ret; } #else ret = maxim4c_module_hw_init(maxim4c); if (ret) { dev_err(dev, "maxim4c module hw init error\n"); return ret; } #endif /* MAXIM4C_TEST_PATTERN */ #endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */ return 0; } static int __maybe_unused maxim4c_suspend(struct device *dev) { return 0; } static const struct dev_pm_ops maxim4c_pm_ops = { SET_RUNTIME_PM_OPS( maxim4c_runtime_suspend, maxim4c_runtime_resume, NULL) SET_LATE_SYSTEM_SLEEP_PM_OPS(maxim4c_suspend, maxim4c_resume) }; static void maxim4c_module_data_init(maxim4c_t *maxim4c) { maxim4c_link_data_init(maxim4c); maxim4c_video_pipe_data_init(maxim4c); maxim4c_mipi_txphy_data_init(maxim4c); } static int maxim4c_extra_init_seq_parse(maxim4c_t *maxim4c, struct device_node *node) { struct device *dev = &maxim4c->client->dev; struct device_node *init_seq_node = NULL; struct maxim4c_i2c_init_seq *init_seq = NULL; init_seq_node = of_get_child_by_name(node, "extra-init-sequence"); if (IS_ERR_OR_NULL(init_seq_node)) { dev_dbg(dev, "%pOF no child node extra-init-sequence\n", node); return 0; } if (!of_device_is_available(init_seq_node)) { dev_dbg(dev, "%pOF is disabled\n", init_seq_node); of_node_put(init_seq_node); return 0; } dev_info(dev, "load extra-init-sequence\n"); init_seq = &maxim4c->extra_init_seq; maxim4c_i2c_load_init_seq(dev, init_seq_node, init_seq); of_node_put(init_seq_node); return 0; } static int maxim4c_module_parse_dt(maxim4c_t *maxim4c) { struct device *dev = &maxim4c->client->dev; struct device_node *node = NULL; u32 value = 0; int ret = 0; // maxim serdes local node = of_get_child_by_name(dev->of_node, "serdes-local-device"); if (IS_ERR_OR_NULL(node)) { dev_err(dev, "%pOF has no child node: serdes-local-device\n", dev->of_node); return -ENODEV; } if (!of_device_is_available(node)) { dev_info(dev, "%pOF is disabled\n", node); of_node_put(node); return -ENODEV; } ret = of_property_read_u32(node, "remote-routing-to-isp", &value); if (ret == 0) { dev_info(dev, "remote-routing-to-isp property: %d\n", value); maxim4c->remote_routing_to_isp = value; } /* gmsl link parse dt */ maxim4c_link_parse_dt(maxim4c, node); /* video pipe parse dt */ maxim4c_video_pipe_parse_dt(maxim4c, node); /* mipi txphy parse dt */ maxim4c_mipi_txphy_parse_dt(maxim4c, node); /* extra init seq parse dt */ maxim4c_extra_init_seq_parse(maxim4c, node); of_node_put(node); return 0; } static int maxim4c_run_extra_init_seq(maxim4c_t *maxim4c) { struct i2c_client *client = maxim4c->client; struct device *dev = &client->dev; int ret = 0; ret = maxim4c_i2c_run_init_seq(client, &maxim4c->extra_init_seq); if (ret) { dev_err(dev, "extra init sequence error\n"); return ret; } return 0; } static int maxim4c_module_hw_previnit(maxim4c_t *maxim4c) { struct i2c_client *client = maxim4c->client; int ret = 0; // All links disable at beginning. ret = maxim4c_i2c_write_reg(client, 0x0006, 0xF0); if (ret) return ret; // MIPI CSI output disable. ret = maxim4c_i2c_write_reg(client, 0x040B, 0x00); if (ret) return ret; // MIPI TXPHY standby ret = maxim4c_i2c_update_reg(client, 0x08A2, 0xF0, 0x00); if (ret) return ret; return 0; } static int maxim4c_module_hw_postinit(maxim4c_t *maxim4c) { struct i2c_client *client = maxim4c->client; int ret = 0; // video pipe disable all ret |= maxim4c_i2c_write_reg(client, 0x00F4, 0); // remote control disable all ret |= maxim4c_link_select_remote_control(maxim4c, 0); return ret; } int maxim4c_module_hw_init(maxim4c_t *maxim4c) { struct device *dev = &maxim4c->client->dev; int ret = 0; ret = maxim4c_module_hw_previnit(maxim4c); if (ret) { dev_err(dev, "%s: hw prev init error\n", __func__); return ret; } ret = maxim4c_link_hw_init(maxim4c); if (ret) { dev_err(dev, "%s: hw link init error\n", __func__); return ret; } ret = maxim4c_video_pipe_hw_init(maxim4c); if (ret) { dev_err(dev, "%s: hw pipe init error\n", __func__); return ret; } ret = maxim4c_mipi_txphy_hw_init(maxim4c); if (ret) { dev_err(dev, "%s: hw txphy init error\n", __func__); return ret; } ret = maxim4c_run_extra_init_seq(maxim4c); if (ret) { dev_err(dev, "%s: run extra init seq error\n", __func__); return ret; } ret = maxim4c_module_hw_postinit(maxim4c); if (ret) { dev_err(dev, "%s: hw post init error\n", __func__); return ret; } return 0; } EXPORT_SYMBOL(maxim4c_module_hw_init); static int maxim4c_configure_regulators(maxim4c_t *maxim4c) { unsigned int i; for (i = 0; i < MAXIM4C_NUM_SUPPLIES; i++) maxim4c->supplies[i].supply = maxim4c_supply_names[i]; return devm_regulator_bulk_get(&maxim4c->client->dev, MAXIM4C_NUM_SUPPLIES, maxim4c->supplies); } static int maxim4c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct device_node *node = dev->of_node; maxim4c_t *maxim4c = NULL; u32 chip_id; int ret = 0; dev_info(dev, "driver version: %02x.%02x.%02x", DRIVER_VERSION >> 16, (DRIVER_VERSION & 0xff00) >> 8, DRIVER_VERSION & 0x00ff); chip_id = (uintptr_t)of_device_get_match_data(dev); if (chip_id == MAX96712_CHIP_ID) { dev_info(dev, "maxim4c driver for max96712\n"); } else if (chip_id == MAX96722_CHIP_ID) { dev_info(dev, "maxim4c driver for max96722\n"); } else { dev_err(dev, "maxim4c driver unknown chip\n"); return -EINVAL; } maxim4c = devm_kzalloc(dev, sizeof(*maxim4c), GFP_KERNEL); if (!maxim4c) { dev_err(dev, "maxim4c probe no memory error\n"); return -ENOMEM; } maxim4c->client = client; maxim4c->chipid = chip_id; maxim4c->sensor_name = MAXIM4C_NAME; ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX, &maxim4c->module_index); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING, &maxim4c->module_facing); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME, &maxim4c->module_name); ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME, &maxim4c->len_name); if (ret) { dev_err(dev, "could not get module information!\n"); return -EINVAL; } ret = maxim4c_configure_regulators(maxim4c); if (ret) { dev_err(dev, "Failed to get power regulators\n"); return ret; } maxim4c->pwdn_regulator = devm_regulator_get(dev, "pwdn"); if (IS_ERR(maxim4c->pwdn_regulator)) { if (PTR_ERR(maxim4c->pwdn_regulator) != -EPROBE_DEFER) dev_err(dev, "Unable to get pwdn regulator (%ld)\n", PTR_ERR(maxim4c->pwdn_regulator)); else dev_err(dev, "Get pwdn regulator deferred\n"); ret = PTR_ERR(maxim4c->pwdn_regulator); return ret; } maxim4c->lock_gpio = devm_gpiod_get(dev, "lock", GPIOD_IN); if (IS_ERR(maxim4c->lock_gpio)) dev_warn(dev, "Failed to get lock-gpios\n"); mutex_init(&maxim4c->mutex); ret = maxim4c_device_power_on(maxim4c); if (ret) goto err_destroy_mutex; pm_runtime_set_active(dev); pm_runtime_get_noresume(dev); pm_runtime_enable(dev); ret = maxim4c_check_local_chipid(maxim4c); if (ret) goto err_power_off; /* * client->dev->driver_data = subdev * subdev->dev->driver_data = maxim4c */ ret = maxim4c_v4l2_subdev_init(maxim4c); if (ret) { dev_err(dev, "maxim4c probe v4l2 subdev init error\n"); goto err_power_off; } /* maxim4c test pattern */ #if MAXIM4C_TEST_PATTERN ret = maxim4c_pattern_data_init(maxim4c); if (ret) goto err_power_off; #if (MAXIM4C_LOCAL_DES_ON_OFF_EN == 0) ret = maxim4c_pattern_hw_init(maxim4c); if (ret) goto err_power_off; #endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */ pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return 0; #endif /* MAXIM4C_TEST_PATTERN */ maxim4c_module_data_init(maxim4c); maxim4c_module_parse_dt(maxim4c); ret = maxim4c_dbgfs_init(maxim4c); if (ret) goto err_subdev_deinit; #if (MAXIM4C_LOCAL_DES_ON_OFF_EN == 0) ret = maxim4c_module_hw_init(maxim4c); if (ret) goto err_dbgfs_deinit; #endif /* MAXIM4C_LOCAL_DES_ON_OFF_EN */ ret = maxim4c_i2c_mux_init(maxim4c); if (ret) goto err_dbgfs_deinit; // i2c mux enable: default disable all remote channel maxim4c_i2c_mux_enable(maxim4c, 0x00); maxim4c_lock_irq_init(maxim4c); maxim4c_lock_state_work_init(maxim4c); pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return 0; err_dbgfs_deinit: maxim4c_dbgfs_deinit(maxim4c); err_subdev_deinit: maxim4c_v4l2_subdev_deinit(maxim4c); err_power_off: pm_runtime_disable(dev); pm_runtime_put_noidle(dev); maxim4c_device_power_off(maxim4c); err_destroy_mutex: mutex_destroy(&maxim4c->mutex); return ret; } #if KERNEL_VERSION(6, 1, 0) > LINUX_VERSION_CODE static int maxim4c_remove(struct i2c_client *client) #else static void maxim4c_remove(struct i2c_client *client) #endif { struct v4l2_subdev *sd = i2c_get_clientdata(client); maxim4c_t *maxim4c = v4l2_get_subdevdata(sd); maxim4c_lock_state_work_deinit(maxim4c); maxim4c_dbgfs_deinit(maxim4c); maxim4c_v4l2_subdev_deinit(maxim4c); maxim4c_i2c_mux_deinit(maxim4c); mutex_destroy(&maxim4c->mutex); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) maxim4c_device_power_off(maxim4c); pm_runtime_set_suspended(&client->dev); #if KERNEL_VERSION(6, 1, 0) > LINUX_VERSION_CODE return 0; #endif } static const struct of_device_id maxim4c_of_match[] = { { .compatible = "maxim4c,max96712", .data = (const void *)MAX96712_CHIP_ID }, { .compatible = "maxim4c,max96722", .data = (const void *)MAX96722_CHIP_ID }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, maxim4c_of_match); static struct i2c_driver maxim4c_i2c_driver = { .driver = { .name = MAXIM4C_NAME, .pm = &maxim4c_pm_ops, .of_match_table = of_match_ptr(maxim4c_of_match), }, .probe = &maxim4c_probe, .remove = &maxim4c_remove, }; module_i2c_driver(maxim4c_i2c_driver); MODULE_AUTHOR("Cai Wenzhong "); MODULE_DESCRIPTION("Maxim quad gmsl deserializer driver"); MODULE_LICENSE("GPL");