// SPDX-License-Identifier: GPL-2.0 /* * Support for GalaxyCore GC0310 VGA camera sensor. * * Copyright (c) 2013 Intel Corporation. All Rights Reserved. * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../include/linux/atomisp_gmin_platform.h" #include "gc0310.h" /* * gc0310_write_reg_array - Initializes a list of GC0310 registers * @client: i2c driver client structure * @reglist: list of registers to be written * @count: number of register, value pairs in the list */ static int gc0310_write_reg_array(struct i2c_client *client, const struct gc0310_reg *reglist, int count) { int i, err; for (i = 0; i < count; i++) { err = i2c_smbus_write_byte_data(client, reglist[i].reg, reglist[i].val); if (err) { dev_err(&client->dev, "write error: wrote 0x%x to offset 0x%x error %d", reglist[i].val, reglist[i].reg, err); return err; } } return 0; } static int gc0310_set_gain(struct v4l2_subdev *sd, int gain) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; u8 again, dgain; if (gain < 0x20) gain = 0x20; if (gain > 0x80) gain = 0x80; if (gain >= 0x20 && gain < 0x40) { again = 0x0; /* sqrt(2) */ dgain = gain; } else { again = 0x2; /* 2 * sqrt(2) */ dgain = gain / 2; } dev_dbg(&client->dev, "gain=0x%x again=0x%x dgain=0x%x\n", gain, again, dgain); /* set analog gain */ ret = i2c_smbus_write_byte_data(client, GC0310_AGC_ADJ, again); if (ret) return ret; /* set digital gain */ ret = i2c_smbus_write_byte_data(client, GC0310_DGC_ADJ, dgain); if (ret) return ret; return 0; } static int __gc0310_set_exposure(struct v4l2_subdev *sd, int coarse_itg, int gain, int digitgain) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; dev_dbg(&client->dev, "coarse_itg=%d gain=%d digitgain=%d\n", coarse_itg, gain, digitgain); /* set exposure */ ret = i2c_smbus_write_word_swapped(client, GC0310_AEC_PK_EXPO_H, coarse_itg); if (ret) return ret; ret = gc0310_set_gain(sd, gain); if (ret) return ret; return ret; } static int gc0310_set_exposure(struct v4l2_subdev *sd, int exposure, int gain, int digitgain) { struct gc0310_device *dev = to_gc0310_sensor(sd); int ret; mutex_lock(&dev->input_lock); ret = __gc0310_set_exposure(sd, exposure, gain, digitgain); mutex_unlock(&dev->input_lock); return ret; } static long gc0310_s_exposure(struct v4l2_subdev *sd, struct atomisp_exposure *exposure) { int exp = exposure->integration_time[0]; int gain = exposure->gain[0]; int digitgain = exposure->gain[1]; /* we should not accept the invalid value below. */ if (gain == 0) { struct i2c_client *client = v4l2_get_subdevdata(sd); v4l2_err(client, "%s: invalid value\n", __func__); return -EINVAL; } return gc0310_set_exposure(sd, exp, gain, digitgain); } static long gc0310_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { switch (cmd) { case ATOMISP_IOC_S_EXPOSURE: return gc0310_s_exposure(sd, arg); default: return -EINVAL; } return 0; } static int gc0310_s_ctrl(struct v4l2_ctrl *ctrl) { int ret = 0; switch (ctrl->id) { default: ret = -EINVAL; } return ret; } static const struct v4l2_ctrl_ops ctrl_ops = { .s_ctrl = gc0310_s_ctrl, }; static int gc0310_init(struct v4l2_subdev *sd) { int ret; struct i2c_client *client = v4l2_get_subdevdata(sd); struct gc0310_device *dev = to_gc0310_sensor(sd); mutex_lock(&dev->input_lock); /* set initial registers */ ret = gc0310_write_reg_array(client, gc0310_reset_register, ARRAY_SIZE(gc0310_reset_register)); /* restore settings */ gc0310_res = gc0310_res_preview; N_RES = N_RES_PREVIEW; mutex_unlock(&dev->input_lock); return ret; } static int power_ctrl(struct v4l2_subdev *sd, bool flag) { int ret = 0; struct gc0310_device *dev = to_gc0310_sensor(sd); if (!dev || !dev->platform_data) return -ENODEV; if (flag) { /* The upstream module driver (written to Crystal * Cove) had this logic to pulse the rails low first. * This appears to break things on the MRD7 with the * X-Powers PMIC... * * ret = dev->platform_data->v1p8_ctrl(sd, 0); * ret |= dev->platform_data->v2p8_ctrl(sd, 0); * mdelay(50); */ ret |= dev->platform_data->v1p8_ctrl(sd, 1); ret |= dev->platform_data->v2p8_ctrl(sd, 1); usleep_range(10000, 15000); } if (!flag || ret) { ret |= dev->platform_data->v1p8_ctrl(sd, 0); ret |= dev->platform_data->v2p8_ctrl(sd, 0); } return ret; } static int gpio_ctrl(struct v4l2_subdev *sd, bool flag) { int ret; struct gc0310_device *dev = to_gc0310_sensor(sd); if (!dev || !dev->platform_data) return -ENODEV; /* GPIO0 == "reset" (active low), GPIO1 == "power down" */ if (flag) { /* Pulse reset, then release power down */ ret = dev->platform_data->gpio0_ctrl(sd, 0); usleep_range(5000, 10000); ret |= dev->platform_data->gpio0_ctrl(sd, 1); usleep_range(10000, 15000); ret |= dev->platform_data->gpio1_ctrl(sd, 0); usleep_range(10000, 15000); } else { ret = dev->platform_data->gpio1_ctrl(sd, 1); ret |= dev->platform_data->gpio0_ctrl(sd, 0); } return ret; } static int power_up(struct v4l2_subdev *sd) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; if (!dev->platform_data) { dev_err(&client->dev, "no camera_sensor_platform_data"); return -ENODEV; } if (dev->power_on) return 0; /* Already on */ /* power control */ ret = power_ctrl(sd, 1); if (ret) goto fail_power; /* flis clock control */ ret = dev->platform_data->flisclk_ctrl(sd, 1); if (ret) goto fail_clk; /* gpio ctrl */ ret = gpio_ctrl(sd, 1); if (ret) { ret = gpio_ctrl(sd, 1); if (ret) goto fail_gpio; } msleep(100); dev->power_on = true; return 0; fail_gpio: dev->platform_data->flisclk_ctrl(sd, 0); fail_clk: power_ctrl(sd, 0); fail_power: dev_err(&client->dev, "sensor power-up failed\n"); return ret; } static int power_down(struct v4l2_subdev *sd) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; if (!dev->platform_data) { dev_err(&client->dev, "no camera_sensor_platform_data"); return -ENODEV; } if (!dev->power_on) return 0; /* Already off */ /* gpio ctrl */ ret = gpio_ctrl(sd, 0); if (ret) { ret = gpio_ctrl(sd, 0); if (ret) dev_err(&client->dev, "gpio failed 2\n"); } ret = dev->platform_data->flisclk_ctrl(sd, 0); if (ret) dev_err(&client->dev, "flisclk failed\n"); /* power control */ ret = power_ctrl(sd, 0); if (ret) dev_err(&client->dev, "vprog failed.\n"); dev->power_on = false; return ret; } static int gc0310_s_power(struct v4l2_subdev *sd, int on) { int ret; if (on == 0) return power_down(sd); ret = power_up(sd); if (ret) return ret; return gc0310_init(sd); } /* TODO: remove it. */ static int startup(struct v4l2_subdev *sd) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; ret = gc0310_write_reg_array(client, dev->res->regs, dev->res->reg_count); if (ret) { dev_err(&client->dev, "gc0310 write register err.\n"); return ret; } return ret; } static int gc0310_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *fmt = &format->format; struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); struct camera_mipi_info *gc0310_info = NULL; struct gc0310_resolution *res; int ret = 0; if (format->pad) return -EINVAL; if (!fmt) return -EINVAL; gc0310_info = v4l2_get_subdev_hostdata(sd); if (!gc0310_info) return -EINVAL; mutex_lock(&dev->input_lock); res = v4l2_find_nearest_size(gc0310_res_preview, ARRAY_SIZE(gc0310_res_preview), width, height, fmt->width, fmt->height); if (!res) res = &gc0310_res_preview[N_RES - 1]; fmt->width = res->width; fmt->height = res->height; dev->res = res; fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8; if (format->which == V4L2_SUBDEV_FORMAT_TRY) { sd_state->pads->try_fmt = *fmt; mutex_unlock(&dev->input_lock); return 0; } /* s_power has not been called yet for std v4l2 clients (camorama) */ power_up(sd); dev_dbg(&client->dev, "%s: before gc0310_write_reg_array %s\n", __func__, dev->res->desc); ret = startup(sd); if (ret) { dev_err(&client->dev, "gc0310 startup err\n"); goto err; } err: mutex_unlock(&dev->input_lock); return ret; } static int gc0310_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { struct v4l2_mbus_framefmt *fmt = &format->format; struct gc0310_device *dev = to_gc0310_sensor(sd); if (format->pad) return -EINVAL; if (!fmt) return -EINVAL; fmt->width = dev->res->width; fmt->height = dev->res->height; fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8; return 0; } static int gc0310_detect(struct i2c_client *client) { struct i2c_adapter *adapter = client->adapter; int ret; if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) return -ENODEV; ret = i2c_smbus_read_word_swapped(client, GC0310_SC_CMMN_CHIP_ID_H); if (ret < 0) { dev_err(&client->dev, "read sensor_id failed: %d\n", ret); return -ENODEV; } dev_dbg(&client->dev, "sensor ID = 0x%x\n", ret); if (ret != GC0310_ID) { dev_err(&client->dev, "sensor ID error, read id = 0x%x, target id = 0x%x\n", ret, GC0310_ID); return -ENODEV; } dev_dbg(&client->dev, "detect gc0310 success\n"); return 0; } static int gc0310_s_stream(struct v4l2_subdev *sd, int enable) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; dev_dbg(&client->dev, "%s S enable=%d\n", __func__, enable); mutex_lock(&dev->input_lock); if (enable) { /* enable per frame MIPI and sensor ctrl reset */ ret = i2c_smbus_write_byte_data(client, 0xFE, 0x30); if (ret) { mutex_unlock(&dev->input_lock); return ret; } } ret = i2c_smbus_write_byte_data(client, GC0310_RESET_RELATED, GC0310_REGISTER_PAGE_3); if (ret) { mutex_unlock(&dev->input_lock); return ret; } ret = i2c_smbus_write_byte_data(client, GC0310_SW_STREAM, enable ? GC0310_START_STREAMING : GC0310_STOP_STREAMING); if (ret) { mutex_unlock(&dev->input_lock); return ret; } ret = i2c_smbus_write_byte_data(client, GC0310_RESET_RELATED, GC0310_REGISTER_PAGE_0); if (ret) { mutex_unlock(&dev->input_lock); return ret; } mutex_unlock(&dev->input_lock); return ret; } static int gc0310_s_config(struct v4l2_subdev *sd, int irq, void *platform_data) { struct gc0310_device *dev = to_gc0310_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; if (!platform_data) return -ENODEV; dev->platform_data = (struct camera_sensor_platform_data *)platform_data; mutex_lock(&dev->input_lock); /* power off the module, then power on it in future * as first power on by board may not fulfill the * power on sequqence needed by the module */ dev->power_on = true; /* force power_down() to run */ ret = power_down(sd); if (ret) { dev_err(&client->dev, "gc0310 power-off err.\n"); goto fail_power_off; } ret = power_up(sd); if (ret) { dev_err(&client->dev, "gc0310 power-up err.\n"); goto fail_power_on; } ret = dev->platform_data->csi_cfg(sd, 1); if (ret) goto fail_csi_cfg; /* config & detect sensor */ ret = gc0310_detect(client); if (ret) { dev_err(&client->dev, "gc0310_detect err s_config.\n"); goto fail_csi_cfg; } /* turn off sensor, after probed */ ret = power_down(sd); if (ret) { dev_err(&client->dev, "gc0310 power-off err.\n"); goto fail_csi_cfg; } mutex_unlock(&dev->input_lock); return 0; fail_csi_cfg: dev->platform_data->csi_cfg(sd, 0); fail_power_on: power_down(sd); dev_err(&client->dev, "sensor power-gating failed\n"); fail_power_off: mutex_unlock(&dev->input_lock); return ret; } static int gc0310_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *interval) { struct gc0310_device *dev = to_gc0310_sensor(sd); interval->interval.numerator = 1; interval->interval.denominator = dev->res->fps; return 0; } static int gc0310_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { if (code->index >= MAX_FMTS) return -EINVAL; code->code = MEDIA_BUS_FMT_SGRBG8_1X8; return 0; } static int gc0310_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fse) { int index = fse->index; if (index >= N_RES) return -EINVAL; fse->min_width = gc0310_res[index].width; fse->min_height = gc0310_res[index].height; fse->max_width = gc0310_res[index].width; fse->max_height = gc0310_res[index].height; return 0; } static int gc0310_g_skip_frames(struct v4l2_subdev *sd, u32 *frames) { struct gc0310_device *dev = to_gc0310_sensor(sd); mutex_lock(&dev->input_lock); *frames = dev->res->skip_frames; mutex_unlock(&dev->input_lock); return 0; } static const struct v4l2_subdev_sensor_ops gc0310_sensor_ops = { .g_skip_frames = gc0310_g_skip_frames, }; static const struct v4l2_subdev_video_ops gc0310_video_ops = { .s_stream = gc0310_s_stream, .g_frame_interval = gc0310_g_frame_interval, }; static const struct v4l2_subdev_core_ops gc0310_core_ops = { .s_power = gc0310_s_power, .ioctl = gc0310_ioctl, }; static const struct v4l2_subdev_pad_ops gc0310_pad_ops = { .enum_mbus_code = gc0310_enum_mbus_code, .enum_frame_size = gc0310_enum_frame_size, .get_fmt = gc0310_get_fmt, .set_fmt = gc0310_set_fmt, }; static const struct v4l2_subdev_ops gc0310_ops = { .core = &gc0310_core_ops, .video = &gc0310_video_ops, .pad = &gc0310_pad_ops, .sensor = &gc0310_sensor_ops, }; static void gc0310_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct gc0310_device *dev = to_gc0310_sensor(sd); dev_dbg(&client->dev, "gc0310_remove...\n"); dev->platform_data->csi_cfg(sd, 0); v4l2_device_unregister_subdev(sd); media_entity_cleanup(&dev->sd.entity); v4l2_ctrl_handler_free(&dev->ctrl_handler); kfree(dev); } static int gc0310_probe(struct i2c_client *client) { struct gc0310_device *dev; int ret; void *pdata; dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (!dev) return -ENOMEM; mutex_init(&dev->input_lock); dev->res = &gc0310_res_preview[0]; v4l2_i2c_subdev_init(&dev->sd, client, &gc0310_ops); pdata = gmin_camera_platform_data(&dev->sd, ATOMISP_INPUT_FORMAT_RAW_8, atomisp_bayer_order_grbg); if (!pdata) { ret = -EINVAL; goto out_free; } ret = gc0310_s_config(&dev->sd, client->irq, pdata); if (ret) goto out_free; ret = atomisp_register_i2c_module(&dev->sd, pdata, RAW_CAMERA); if (ret) goto out_free; dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; dev->pad.flags = MEDIA_PAD_FL_SOURCE; dev->format.code = MEDIA_BUS_FMT_SGRBG8_1X8; dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; ret = v4l2_ctrl_handler_init(&dev->ctrl_handler, 0); if (ret) { gc0310_remove(client); return ret; } if (dev->ctrl_handler.error) { gc0310_remove(client); return dev->ctrl_handler.error; } /* Use same lock for controls as for everything else. */ dev->ctrl_handler.lock = &dev->input_lock; dev->sd.ctrl_handler = &dev->ctrl_handler; ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad); if (ret) gc0310_remove(client); return ret; out_free: v4l2_device_unregister_subdev(&dev->sd); kfree(dev); return ret; } static const struct acpi_device_id gc0310_acpi_match[] = { {"XXGC0310"}, {"INT0310"}, {}, }; MODULE_DEVICE_TABLE(acpi, gc0310_acpi_match); static struct i2c_driver gc0310_driver = { .driver = { .name = "gc0310", .acpi_match_table = gc0310_acpi_match, }, .probe_new = gc0310_probe, .remove = gc0310_remove, }; module_i2c_driver(gc0310_driver); MODULE_AUTHOR("Lai, Angie "); MODULE_DESCRIPTION("A low-level driver for GalaxyCore GC0310 sensors"); MODULE_LICENSE("GPL");