diff options
Diffstat (limited to 'drivers/media/i2c/m5mols/m5mols_core.c')
| -rw-r--r-- | drivers/media/i2c/m5mols/m5mols_core.c | 1057 |
1 files changed, 1057 insertions, 0 deletions
diff --git a/drivers/media/i2c/m5mols/m5mols_core.c b/drivers/media/i2c/m5mols/m5mols_core.c new file mode 100644 index 0000000..0b899cb --- /dev/null +++ b/drivers/media/i2c/m5mols/m5mols_core.c @@ -0,0 +1,1057 @@ +/* + * Driver for M-5MOLS 8M Pixel camera sensor with ISP + * + * Copyright (C) 2011 Samsung Electronics Co., Ltd. + * Author: HeungJun Kim <riverful.kim@samsung.com> + * + * Copyright (C) 2009 Samsung Electronics Co., Ltd. + * Author: Dongsoo Nathaniel Kim <dongsoo45.kim@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/regulator/consumer.h> +#include <linux/videodev2.h> +#include <linux/module.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-subdev.h> +#include <media/m5mols.h> + +#include "m5mols.h" +#include "m5mols_reg.h" + +int m5mols_debug; +module_param(m5mols_debug, int, 0644); + +#define MODULE_NAME "M5MOLS" +#define M5MOLS_I2C_CHECK_RETRY 500 + +/* The regulator consumer names for external voltage regulators */ +static struct regulator_bulk_data supplies[] = { + { + .supply = "core", /* ARM core power, 1.2V */ + }, { + .supply = "dig_18", /* digital power 1, 1.8V */ + }, { + .supply = "d_sensor", /* sensor power 1, 1.8V */ + }, { + .supply = "dig_28", /* digital power 2, 2.8V */ + }, { + .supply = "a_sensor", /* analog power */ + }, { + .supply = "dig_12", /* digital power 3, 1.2V */ + }, +}; + +static struct v4l2_mbus_framefmt m5mols_default_ffmt[M5MOLS_RESTYPE_MAX] = { + [M5MOLS_RESTYPE_MONITOR] = { + .width = 1920, + .height = 1080, + .code = V4L2_MBUS_FMT_VYUY8_2X8, + .field = V4L2_FIELD_NONE, + .colorspace = V4L2_COLORSPACE_JPEG, + }, + [M5MOLS_RESTYPE_CAPTURE] = { + .width = 1920, + .height = 1080, + .code = V4L2_MBUS_FMT_JPEG_1X8, + .field = V4L2_FIELD_NONE, + .colorspace = V4L2_COLORSPACE_JPEG, + }, +}; +#define SIZE_DEFAULT_FFMT ARRAY_SIZE(m5mols_default_ffmt) + +static const struct m5mols_resolution m5mols_reg_res[] = { + { 0x01, M5MOLS_RESTYPE_MONITOR, 128, 96 }, /* SUB-QCIF */ + { 0x03, M5MOLS_RESTYPE_MONITOR, 160, 120 }, /* QQVGA */ + { 0x05, M5MOLS_RESTYPE_MONITOR, 176, 144 }, /* QCIF */ + { 0x06, M5MOLS_RESTYPE_MONITOR, 176, 176 }, + { 0x08, M5MOLS_RESTYPE_MONITOR, 240, 320 }, /* QVGA */ + { 0x09, M5MOLS_RESTYPE_MONITOR, 320, 240 }, /* QVGA */ + { 0x0c, M5MOLS_RESTYPE_MONITOR, 240, 400 }, /* WQVGA */ + { 0x0d, M5MOLS_RESTYPE_MONITOR, 400, 240 }, /* WQVGA */ + { 0x0e, M5MOLS_RESTYPE_MONITOR, 352, 288 }, /* CIF */ + { 0x13, M5MOLS_RESTYPE_MONITOR, 480, 360 }, + { 0x15, M5MOLS_RESTYPE_MONITOR, 640, 360 }, /* qHD */ + { 0x17, M5MOLS_RESTYPE_MONITOR, 640, 480 }, /* VGA */ + { 0x18, M5MOLS_RESTYPE_MONITOR, 720, 480 }, + { 0x1a, M5MOLS_RESTYPE_MONITOR, 800, 480 }, /* WVGA */ + { 0x1f, M5MOLS_RESTYPE_MONITOR, 800, 600 }, /* SVGA */ + { 0x21, M5MOLS_RESTYPE_MONITOR, 1280, 720 }, /* HD */ + { 0x25, M5MOLS_RESTYPE_MONITOR, 1920, 1080 }, /* 1080p */ + { 0x29, M5MOLS_RESTYPE_MONITOR, 3264, 2448 }, /* 2.63fps 8M */ + { 0x39, M5MOLS_RESTYPE_MONITOR, 800, 602 }, /* AHS_MON debug */ + + { 0x02, M5MOLS_RESTYPE_CAPTURE, 320, 240 }, /* QVGA */ + { 0x04, M5MOLS_RESTYPE_CAPTURE, 400, 240 }, /* WQVGA */ + { 0x07, M5MOLS_RESTYPE_CAPTURE, 480, 360 }, + { 0x08, M5MOLS_RESTYPE_CAPTURE, 640, 360 }, /* qHD */ + { 0x09, M5MOLS_RESTYPE_CAPTURE, 640, 480 }, /* VGA */ + { 0x0a, M5MOLS_RESTYPE_CAPTURE, 800, 480 }, /* WVGA */ + { 0x10, M5MOLS_RESTYPE_CAPTURE, 1280, 720 }, /* HD */ + { 0x14, M5MOLS_RESTYPE_CAPTURE, 1280, 960 }, /* 1M */ + { 0x17, M5MOLS_RESTYPE_CAPTURE, 1600, 1200 }, /* 2M */ + { 0x19, M5MOLS_RESTYPE_CAPTURE, 1920, 1080 }, /* Full-HD */ + { 0x1a, M5MOLS_RESTYPE_CAPTURE, 2048, 1152 }, /* 3Mega */ + { 0x1b, M5MOLS_RESTYPE_CAPTURE, 2048, 1536 }, + { 0x1c, M5MOLS_RESTYPE_CAPTURE, 2560, 1440 }, /* 4Mega */ + { 0x1d, M5MOLS_RESTYPE_CAPTURE, 2560, 1536 }, + { 0x1f, M5MOLS_RESTYPE_CAPTURE, 2560, 1920 }, /* 5Mega */ + { 0x21, M5MOLS_RESTYPE_CAPTURE, 3264, 1836 }, /* 6Mega */ + { 0x22, M5MOLS_RESTYPE_CAPTURE, 3264, 1960 }, + { 0x25, M5MOLS_RESTYPE_CAPTURE, 3264, 2448 }, /* 8Mega */ +}; + +/** + * m5mols_swap_byte - an byte array to integer conversion function + * @size: size in bytes of I2C packet defined in the M-5MOLS datasheet + * + * Convert I2C data byte array with performing any required byte + * reordering to assure proper values for each data type, regardless + * of the architecture endianness. + */ +static u32 m5mols_swap_byte(u8 *data, u8 length) +{ + if (length == 1) + return *data; + else if (length == 2) + return be16_to_cpu(*((u16 *)data)); + else + return be32_to_cpu(*((u32 *)data)); +} + +/** + * m5mols_read - I2C read function + * @reg: combination of size, category and command for the I2C packet + * @size: desired size of I2C packet + * @val: read value + * + * Returns 0 on success, or else negative errno. + */ +static int m5mols_read(struct v4l2_subdev *sd, u32 size, u32 reg, u32 *val) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct m5mols_info *info = to_m5mols(sd); + u8 rbuf[M5MOLS_I2C_MAX_SIZE + 1]; + u8 category = I2C_CATEGORY(reg); + u8 cmd = I2C_COMMAND(reg); + struct i2c_msg msg[2]; + u8 wbuf[5]; + int ret; + + if (!client->adapter) + return -ENODEV; + + msg[0].addr = client->addr; + msg[0].flags = 0; + msg[0].len = 5; + msg[0].buf = wbuf; + wbuf[0] = 5; + wbuf[1] = M5MOLS_BYTE_READ; + wbuf[2] = category; + wbuf[3] = cmd; + wbuf[4] = size; + + msg[1].addr = client->addr; + msg[1].flags = I2C_M_RD; + msg[1].len = size + 1; + msg[1].buf = rbuf; + + /* minimum stabilization time */ + usleep_range(200, 200); + + ret = i2c_transfer(client->adapter, msg, 2); + + if (ret == 2) { + *val = m5mols_swap_byte(&rbuf[1], size); + return 0; + } + + if (info->isp_ready) + v4l2_err(sd, "read failed: size:%d cat:%02x cmd:%02x. %d\n", + size, category, cmd, ret); + + return ret < 0 ? ret : -EIO; +} + +int m5mols_read_u8(struct v4l2_subdev *sd, u32 reg, u8 *val) +{ + u32 val_32; + int ret; + + if (I2C_SIZE(reg) != 1) { + v4l2_err(sd, "Wrong data size\n"); + return -EINVAL; + } + + ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32); + if (ret) + return ret; + + *val = (u8)val_32; + return ret; +} + +int m5mols_read_u16(struct v4l2_subdev *sd, u32 reg, u16 *val) +{ + u32 val_32; + int ret; + + if (I2C_SIZE(reg) != 2) { + v4l2_err(sd, "Wrong data size\n"); + return -EINVAL; + } + + ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32); + if (ret) + return ret; + + *val = (u16)val_32; + return ret; +} + +int m5mols_read_u32(struct v4l2_subdev *sd, u32 reg, u32 *val) +{ + if (I2C_SIZE(reg) != 4) { + v4l2_err(sd, "Wrong data size\n"); + return -EINVAL; + } + + return m5mols_read(sd, I2C_SIZE(reg), reg, val); +} + +/** + * m5mols_write - I2C command write function + * @reg: combination of size, category and command for the I2C packet + * @val: value to write + * + * Returns 0 on success, or else negative errno. + */ +int m5mols_write(struct v4l2_subdev *sd, u32 reg, u32 val) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct m5mols_info *info = to_m5mols(sd); + u8 wbuf[M5MOLS_I2C_MAX_SIZE + 4]; + u8 category = I2C_CATEGORY(reg); + u8 cmd = I2C_COMMAND(reg); + u8 size = I2C_SIZE(reg); + u32 *buf = (u32 *)&wbuf[4]; + struct i2c_msg msg[1]; + int ret; + + if (!client->adapter) + return -ENODEV; + + if (size != 1 && size != 2 && size != 4) { + v4l2_err(sd, "Wrong data size\n"); + return -EINVAL; + } + + msg->addr = client->addr; + msg->flags = 0; + msg->len = (u16)size + 4; + msg->buf = wbuf; + wbuf[0] = size + 4; + wbuf[1] = M5MOLS_BYTE_WRITE; + wbuf[2] = category; + wbuf[3] = cmd; + + *buf = m5mols_swap_byte((u8 *)&val, size); + + usleep_range(200, 200); + + ret = i2c_transfer(client->adapter, msg, 1); + if (ret == 1) + return 0; + + if (info->isp_ready) + v4l2_err(sd, "write failed: cat:%02x cmd:%02x ret:%d\n", + category, cmd, ret); + + return ret < 0 ? ret : -EIO; +} + +/** + * m5mols_busy_wait - Busy waiting with I2C register polling + * @reg: the I2C_REG() address of an 8-bit status register to check + * @value: expected status register value + * @mask: bit mask for the read status register value + * @timeout: timeout in miliseconds, or -1 for default timeout + * + * The @reg register value is ORed with @mask before comparing with @value. + * + * Return: 0 if the requested condition became true within less than + * @timeout ms, or else negative errno. + */ +int m5mols_busy_wait(struct v4l2_subdev *sd, u32 reg, u32 value, u32 mask, + int timeout) +{ + int ms = timeout < 0 ? M5MOLS_BUSY_WAIT_DEF_TIMEOUT : timeout; + unsigned long end = jiffies + msecs_to_jiffies(ms); + u8 status; + + do { + int ret = m5mols_read_u8(sd, reg, &status); + + if (ret < 0 && !(mask & M5MOLS_I2C_RDY_WAIT_FL)) + return ret; + if (!ret && (status & mask & 0xff) == (value & 0xff)) + return 0; + usleep_range(100, 250); + } while (ms > 0 && time_is_after_jiffies(end)); + + return -EBUSY; +} + +/** + * m5mols_enable_interrupt - Clear interrupt pending bits and unmask interrupts + * + * Before writing desired interrupt value the INT_FACTOR register should + * be read to clear pending interrupts. + */ +int m5mols_enable_interrupt(struct v4l2_subdev *sd, u8 reg) +{ + struct m5mols_info *info = to_m5mols(sd); + u8 mask = is_available_af(info) ? REG_INT_AF : 0; + u8 dummy; + int ret; + + ret = m5mols_read_u8(sd, SYSTEM_INT_FACTOR, &dummy); + if (!ret) + ret = m5mols_write(sd, SYSTEM_INT_ENABLE, reg & ~mask); + return ret; +} + +int m5mols_wait_interrupt(struct v4l2_subdev *sd, u8 irq_mask, u32 timeout) +{ + struct m5mols_info *info = to_m5mols(sd); + + int ret = wait_event_interruptible_timeout(info->irq_waitq, + atomic_add_unless(&info->irq_done, -1, 0), + msecs_to_jiffies(timeout)); + if (ret <= 0) + return ret ? ret : -ETIMEDOUT; + + return m5mols_busy_wait(sd, SYSTEM_INT_FACTOR, irq_mask, + M5MOLS_I2C_RDY_WAIT_FL | irq_mask, -1); +} + +/** + * m5mols_reg_mode - Write the mode and check busy status + * + * It always accompanies a little delay changing the M-5MOLS mode, so it is + * needed checking current busy status to guarantee right mode. + */ +static int m5mols_reg_mode(struct v4l2_subdev *sd, u8 mode) +{ + int ret = m5mols_write(sd, SYSTEM_SYSMODE, mode); + if (ret < 0) + return ret; + return m5mols_busy_wait(sd, SYSTEM_SYSMODE, mode, 0xff, + M5MOLS_MODE_CHANGE_TIMEOUT); +} + +/** + * m5mols_set_mode - set the M-5MOLS controller mode + * @mode: the required operation mode + * + * The commands of M-5MOLS are grouped into specific modes. Each functionality + * can be guaranteed only when the sensor is operating in mode which a command + * belongs to. + */ +int m5mols_set_mode(struct m5mols_info *info, u8 mode) +{ + struct v4l2_subdev *sd = &info->sd; + int ret = -EINVAL; + u8 reg; + + if (mode < REG_PARAMETER || mode > REG_CAPTURE) + return ret; + + ret = m5mols_read_u8(sd, SYSTEM_SYSMODE, ®); + if (ret || reg == mode) + return ret; + + switch (reg) { + case REG_PARAMETER: + ret = m5mols_reg_mode(sd, REG_MONITOR); + if (mode == REG_MONITOR) + break; + if (!ret) + ret = m5mols_reg_mode(sd, REG_CAPTURE); + break; + + case REG_MONITOR: + if (mode == REG_PARAMETER) { + ret = m5mols_reg_mode(sd, REG_PARAMETER); + break; + } + + ret = m5mols_reg_mode(sd, REG_CAPTURE); + break; + + case REG_CAPTURE: + ret = m5mols_reg_mode(sd, REG_MONITOR); + if (mode == REG_MONITOR) + break; + if (!ret) + ret = m5mols_reg_mode(sd, REG_PARAMETER); + break; + + default: + v4l2_warn(sd, "Wrong mode: %d\n", mode); + } + + if (!ret) + info->mode = mode; + + return ret; +} + +/** + * m5mols_get_version - retrieve full revisions information of M-5MOLS + * + * The version information includes revisions of hardware and firmware, + * AutoFocus alghorithm version and the version string. + */ +static int m5mols_get_version(struct v4l2_subdev *sd) +{ + struct m5mols_info *info = to_m5mols(sd); + struct m5mols_version *ver = &info->ver; + u8 *str = ver->str; + int i; + int ret; + + ret = m5mols_read_u8(sd, SYSTEM_VER_CUSTOMER, &ver->customer); + if (!ret) + ret = m5mols_read_u8(sd, SYSTEM_VER_PROJECT, &ver->project); + if (!ret) + ret = m5mols_read_u16(sd, SYSTEM_VER_FIRMWARE, &ver->fw); + if (!ret) + ret = m5mols_read_u16(sd, SYSTEM_VER_HARDWARE, &ver->hw); + if (!ret) + ret = m5mols_read_u16(sd, SYSTEM_VER_PARAMETER, &ver->param); + if (!ret) + ret = m5mols_read_u16(sd, SYSTEM_VER_AWB, &ver->awb); + if (!ret) + ret = m5mols_read_u8(sd, AF_VERSION, &ver->af); + if (ret) + return ret; + + for (i = 0; i < VERSION_STRING_SIZE; i++) { + ret = m5mols_read_u8(sd, SYSTEM_VER_STRING, &str[i]); + if (ret) + return ret; + } + + ver->fw = be16_to_cpu(ver->fw); + ver->hw = be16_to_cpu(ver->hw); + ver->param = be16_to_cpu(ver->param); + ver->awb = be16_to_cpu(ver->awb); + + v4l2_info(sd, "Manufacturer\t[%s]\n", + is_manufacturer(info, REG_SAMSUNG_ELECTRO) ? + "Samsung Electro-Machanics" : + is_manufacturer(info, REG_SAMSUNG_OPTICS) ? + "Samsung Fiber-Optics" : + is_manufacturer(info, REG_SAMSUNG_TECHWIN) ? + "Samsung Techwin" : "None"); + v4l2_info(sd, "Customer/Project\t[0x%02x/0x%02x]\n", + info->ver.customer, info->ver.project); + + if (!is_available_af(info)) + v4l2_info(sd, "No support Auto Focus on this firmware\n"); + + return ret; +} + +/** + * __find_restype - Lookup M-5MOLS resolution type according to pixel code + * @code: pixel code + */ +static enum m5mols_restype __find_restype(enum v4l2_mbus_pixelcode code) +{ + enum m5mols_restype type = M5MOLS_RESTYPE_MONITOR; + + do { + if (code == m5mols_default_ffmt[type].code) + return type; + } while (type++ != SIZE_DEFAULT_FFMT); + + return 0; +} + +/** + * __find_resolution - Lookup preset and type of M-5MOLS's resolution + * @mf: pixel format to find/negotiate the resolution preset for + * @type: M-5MOLS resolution type + * @resolution: M-5MOLS resolution preset register value + * + * Find nearest resolution matching resolution preset and adjust mf + * to supported values. + */ +static int __find_resolution(struct v4l2_subdev *sd, + struct v4l2_mbus_framefmt *mf, + enum m5mols_restype *type, + u32 *resolution) +{ + const struct m5mols_resolution *fsize = &m5mols_reg_res[0]; + const struct m5mols_resolution *match = NULL; + enum m5mols_restype stype = __find_restype(mf->code); + int i = ARRAY_SIZE(m5mols_reg_res); + unsigned int min_err = ~0; + + while (i--) { + int err; + if (stype == fsize->type) { + err = abs(fsize->width - mf->width) + + abs(fsize->height - mf->height); + + if (err < min_err) { + min_err = err; + match = fsize; + } + } + fsize++; + } + if (match) { + mf->width = match->width; + mf->height = match->height; + *resolution = match->reg; + *type = stype; + return 0; + } + + return -EINVAL; +} + +static struct v4l2_mbus_framefmt *__find_format(struct m5mols_info *info, + struct v4l2_subdev_fh *fh, + enum v4l2_subdev_format_whence which, + enum m5mols_restype type) +{ + if (which == V4L2_SUBDEV_FORMAT_TRY) + return fh ? v4l2_subdev_get_try_format(fh, 0) : NULL; + + return &info->ffmt[type]; +} + +static int m5mols_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct m5mols_info *info = to_m5mols(sd); + struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&info->lock); + + format = __find_format(info, fh, fmt->which, info->res_type); + if (format) + fmt->format = *format; + else + ret = -EINVAL; + + mutex_unlock(&info->lock); + return ret; +} + +static int m5mols_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct m5mols_info *info = to_m5mols(sd); + struct v4l2_mbus_framefmt *format = &fmt->format; + struct v4l2_mbus_framefmt *sfmt; + enum m5mols_restype type; + u32 resolution = 0; + int ret; + + ret = __find_resolution(sd, format, &type, &resolution); + if (ret < 0) + return ret; + + sfmt = __find_format(info, fh, fmt->which, type); + if (!sfmt) + return 0; + + mutex_lock(&info->lock); + + format->code = m5mols_default_ffmt[type].code; + format->colorspace = V4L2_COLORSPACE_JPEG; + format->field = V4L2_FIELD_NONE; + + if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + *sfmt = *format; + info->resolution = resolution; + info->res_type = type; + } + + mutex_unlock(&info->lock); + return ret; +} + +static int m5mols_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_frame_desc *fd) +{ + struct m5mols_info *info = to_m5mols(sd); + + if (pad != 0 || fd == NULL) + return -EINVAL; + + mutex_lock(&info->lock); + /* + * .get_frame_desc is only used for compressed formats, + * thus we always return the capture frame parameters here. + */ + fd->entry[0].length = info->cap.buf_size; + fd->entry[0].pixelcode = info->ffmt[M5MOLS_RESTYPE_CAPTURE].code; + mutex_unlock(&info->lock); + + fd->entry[0].flags = V4L2_MBUS_FRAME_DESC_FL_LEN_MAX; + fd->num_entries = 1; + + return 0; +} + +static int m5mols_set_frame_desc(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_frame_desc *fd) +{ + struct m5mols_info *info = to_m5mols(sd); + struct v4l2_mbus_framefmt *mf = &info->ffmt[M5MOLS_RESTYPE_CAPTURE]; + + if (pad != 0 || fd == NULL) + return -EINVAL; + + fd->entry[0].flags = V4L2_MBUS_FRAME_DESC_FL_LEN_MAX; + fd->num_entries = 1; + fd->entry[0].length = clamp_t(u32, fd->entry[0].length, + mf->width * mf->height, + M5MOLS_MAIN_JPEG_SIZE_MAX); + mutex_lock(&info->lock); + info->cap.buf_size = fd->entry[0].length; + mutex_unlock(&info->lock); + + return 0; +} + + +static int m5mols_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (!code || code->index >= SIZE_DEFAULT_FFMT) + return -EINVAL; + + code->code = m5mols_default_ffmt[code->index].code; + + return 0; +} + +static struct v4l2_subdev_pad_ops m5mols_pad_ops = { + .enum_mbus_code = m5mols_enum_mbus_code, + .get_fmt = m5mols_get_fmt, + .set_fmt = m5mols_set_fmt, + .get_frame_desc = m5mols_get_frame_desc, + .set_frame_desc = m5mols_set_frame_desc, +}; + +/** + * m5mols_restore_controls - Apply current control values to the registers + * + * m5mols_do_scenemode() handles all parameters for which there is yet no + * individual control. It should be replaced at some point by setting each + * control individually, in required register set up order. + */ +int m5mols_restore_controls(struct m5mols_info *info) +{ + int ret; + + if (info->ctrl_sync) + return 0; + + ret = m5mols_do_scenemode(info, REG_SCENE_NORMAL); + if (ret) + return ret; + + ret = v4l2_ctrl_handler_setup(&info->handle); + info->ctrl_sync = !ret; + + return ret; +} + +/** + * m5mols_start_monitor - Start the monitor mode + * + * Before applying the controls setup the resolution and frame rate + * in PARAMETER mode, and then switch over to MONITOR mode. + */ +static int m5mols_start_monitor(struct m5mols_info *info) +{ + struct v4l2_subdev *sd = &info->sd; + int ret; + + ret = m5mols_set_mode(info, REG_PARAMETER); + if (!ret) + ret = m5mols_write(sd, PARM_MON_SIZE, info->resolution); + if (!ret) + ret = m5mols_write(sd, PARM_MON_FPS, REG_FPS_30); + if (!ret) + ret = m5mols_set_mode(info, REG_MONITOR); + if (!ret) + ret = m5mols_restore_controls(info); + + return ret; +} + +static int m5mols_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct m5mols_info *info = to_m5mols(sd); + u32 code; + int ret; + + mutex_lock(&info->lock); + code = info->ffmt[info->res_type].code; + + if (enable) { + if (is_code(code, M5MOLS_RESTYPE_MONITOR)) + ret = m5mols_start_monitor(info); + else if (is_code(code, M5MOLS_RESTYPE_CAPTURE)) + ret = m5mols_start_capture(info); + else + ret = -EINVAL; + } else { + ret = m5mols_set_mode(info, REG_PARAMETER); + } + + mutex_unlock(&info->lock); + return ret; +} + +static const struct v4l2_subdev_video_ops m5mols_video_ops = { + .s_stream = m5mols_s_stream, +}; + +static int m5mols_sensor_power(struct m5mols_info *info, bool enable) +{ + struct v4l2_subdev *sd = &info->sd; + struct i2c_client *client = v4l2_get_subdevdata(sd); + const struct m5mols_platform_data *pdata = info->pdata; + int ret; + + if (info->power == enable) + return 0; + + if (enable) { + if (info->set_power) { + ret = info->set_power(&client->dev, 1); + if (ret) + return ret; + } + + ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies); + if (ret) { + info->set_power(&client->dev, 0); + return ret; + } + + gpio_set_value(pdata->gpio_reset, !pdata->reset_polarity); + info->power = 1; + + return ret; + } + + ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies); + if (ret) + return ret; + + if (info->set_power) + info->set_power(&client->dev, 0); + + gpio_set_value(pdata->gpio_reset, pdata->reset_polarity); + + info->isp_ready = 0; + info->power = 0; + + return ret; +} + +/* m5mols_update_fw - optional firmware update routine */ +int __attribute__ ((weak)) m5mols_update_fw(struct v4l2_subdev *sd, + int (*set_power)(struct m5mols_info *, bool)) +{ + return 0; +} + +/** + * m5mols_fw_start - M-5MOLS internal ARM controller initialization + * + * Execute the M-5MOLS internal ARM controller initialization sequence. + * This function should be called after the supply voltage has been + * applied and before any requests to the device are made. + */ +static int m5mols_fw_start(struct v4l2_subdev *sd) +{ + struct m5mols_info *info = to_m5mols(sd); + int ret; + + atomic_set(&info->irq_done, 0); + /* Wait until I2C slave is initialized in Flash Writer mode */ + ret = m5mols_busy_wait(sd, FLASH_CAM_START, REG_IN_FLASH_MODE, + M5MOLS_I2C_RDY_WAIT_FL | 0xff, -1); + if (!ret) + ret = m5mols_write(sd, FLASH_CAM_START, REG_START_ARM_BOOT); + if (!ret) + ret = m5mols_wait_interrupt(sd, REG_INT_MODE, 2000); + if (ret < 0) + return ret; + + info->isp_ready = 1; + + ret = m5mols_get_version(sd); + if (!ret) + ret = m5mols_update_fw(sd, m5mols_sensor_power); + if (ret) + return ret; + + v4l2_dbg(1, m5mols_debug, sd, "Success ARM Booting\n"); + + ret = m5mols_write(sd, PARM_INTERFACE, REG_INTERFACE_MIPI); + if (!ret) + ret = m5mols_enable_interrupt(sd, + REG_INT_AF | REG_INT_CAPTURE); + + return ret; +} + +/* Execute the lens soft-landing algorithm */ +static int m5mols_auto_focus_stop(struct m5mols_info *info) +{ + int ret; + + ret = m5mols_write(&info->sd, AF_EXECUTE, REG_AF_STOP); + if (!ret) + ret = m5mols_write(&info->sd, AF_MODE, REG_AF_POWEROFF); + if (!ret) + ret = m5mols_busy_wait(&info->sd, SYSTEM_STATUS, REG_AF_IDLE, + 0xff, -1); + return ret; +} + +/** + * m5mols_s_power - Main sensor power control function + * + * To prevent breaking the lens when the sensor is powered off the Soft-Landing + * algorithm is called where available. The Soft-Landing algorithm availability + * dependends on the firmware provider. + */ +static int m5mols_s_power(struct v4l2_subdev *sd, int on) +{ + struct m5mols_info *info = to_m5mols(sd); + int ret; + + mutex_lock(&info->lock); + + if (on) { + ret = m5mols_sensor_power(info, true); + if (!ret) + ret = m5mols_fw_start(sd); + } else { + if (is_manufacturer(info, REG_SAMSUNG_TECHWIN)) { + ret = m5mols_set_mode(info, REG_MONITOR); + if (!ret) + ret = m5mols_auto_focus_stop(info); + if (ret < 0) + v4l2_warn(sd, "Soft landing lens failed\n"); + } + ret = m5mols_sensor_power(info, false); + + info->ctrl_sync = 0; + } + + mutex_unlock(&info->lock); + return ret; +} + +static int m5mols_log_status(struct v4l2_subdev *sd) +{ + struct m5mols_info *info = to_m5mols(sd); + + v4l2_ctrl_handler_log_status(&info->handle, sd->name); + + return 0; +} + +static const struct v4l2_subdev_core_ops m5mols_core_ops = { + .s_power = m5mols_s_power, + .log_status = m5mols_log_status, +}; + +/* + * V4L2 subdev internal operations + */ +static int m5mols_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(fh, 0); + + *format = m5mols_default_ffmt[0]; + return 0; +} + +static const struct v4l2_subdev_internal_ops m5mols_subdev_internal_ops = { + .open = m5mols_open, +}; + +static const struct v4l2_subdev_ops m5mols_ops = { + .core = &m5mols_core_ops, + .pad = &m5mols_pad_ops, + .video = &m5mols_video_ops, +}; + +static irqreturn_t m5mols_irq_handler(int irq, void *data) +{ + struct m5mols_info *info = to_m5mols(data); + + atomic_set(&info->irq_done, 1); + wake_up_interruptible(&info->irq_waitq); + + return IRQ_HANDLED; +} + +static int m5mols_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + const struct m5mols_platform_data *pdata = client->dev.platform_data; + struct m5mols_info *info; + struct v4l2_subdev *sd; + int ret; + + if (pdata == NULL) { + dev_err(&client->dev, "No platform data\n"); + return -EINVAL; + } + + if (!gpio_is_valid(pdata->gpio_reset)) { + dev_err(&client->dev, "No valid RESET GPIO specified\n"); + return -EINVAL; + } + + if (!client->irq) { + dev_err(&client->dev, "Interrupt not assigned\n"); + return -EINVAL; + } + + info = kzalloc(sizeof(struct m5mols_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->pdata = pdata; + info->set_power = pdata->set_power; + + ret = gpio_request(pdata->gpio_reset, "M5MOLS_NRST"); + if (ret) { + dev_err(&client->dev, "Failed to request gpio: %d\n", ret); + goto out_free; + } + gpio_direction_output(pdata->gpio_reset, pdata->reset_polarity); + + ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(supplies), supplies); + if (ret) { + dev_err(&client->dev, "Failed to get regulators: %d\n", ret); + goto out_gpio; + } + + sd = &info->sd; + v4l2_i2c_subdev_init(sd, client, &m5mols_ops); + strlcpy(sd->name, MODULE_NAME, sizeof(sd->name)); + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + sd->internal_ops = &m5mols_subdev_internal_ops; + info->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_init(&sd->entity, 1, &info->pad, 0); + if (ret < 0) + goto out_reg; + sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR; + + init_waitqueue_head(&info->irq_waitq); + mutex_init(&info->lock); + + ret = request_irq(client->irq, m5mols_irq_handler, + IRQF_TRIGGER_RISING, MODULE_NAME, sd); + if (ret) { + dev_err(&client->dev, "Interrupt request failed: %d\n", ret); + goto out_me; + } + info->res_type = M5MOLS_RESTYPE_MONITOR; + info->ffmt[0] = m5mols_default_ffmt[0]; + info->ffmt[1] = m5mols_default_ffmt[1]; + + ret = m5mols_sensor_power(info, true); + if (ret) + goto out_irq; + + ret = m5mols_fw_start(sd); + if (!ret) + ret = m5mols_init_controls(sd); + + ret = m5mols_sensor_power(info, false); + if (!ret) + return 0; +out_irq: + free_irq(client->irq, sd); +out_me: + media_entity_cleanup(&sd->entity); +out_reg: + regulator_bulk_free(ARRAY_SIZE(supplies), supplies); +out_gpio: + gpio_free(pdata->gpio_reset); +out_free: + kfree(info); + return ret; +} + +static int m5mols_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct m5mols_info *info = to_m5mols(sd); + + v4l2_device_unregister_subdev(sd); + v4l2_ctrl_handler_free(sd->ctrl_handler); + free_irq(client->irq, sd); + + regulator_bulk_free(ARRAY_SIZE(supplies), supplies); + gpio_free(info->pdata->gpio_reset); + media_entity_cleanup(&sd->entity); + kfree(info); + return 0; +} + +static const struct i2c_device_id m5mols_id[] = { + { MODULE_NAME, 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, m5mols_id); + +static struct i2c_driver m5mols_i2c_driver = { + .driver = { + .name = MODULE_NAME, + }, + .probe = m5mols_probe, + .remove = m5mols_remove, + .id_table = m5mols_id, +}; + +module_i2c_driver(m5mols_i2c_driver); + +MODULE_AUTHOR("HeungJun Kim <riverful.kim@samsung.com>"); +MODULE_AUTHOR("Dongsoo Kim <dongsoo45.kim@samsung.com>"); +MODULE_DESCRIPTION("Fujitsu M-5MOLS 8M Pixel camera driver"); +MODULE_LICENSE("GPL"); |