/* * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor * * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com) * This code is placed under the terms of the GNU General Public License v2 */ #include #include #include #include #include "mt9v011.h" #include #include MODULE_DESCRIPTION("Micron mt9v011 sensor driver"); MODULE_AUTHOR("Mauro Carvalho Chehab "); MODULE_LICENSE("GPL"); static int debug; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0-2)"); /* supported controls */ static struct v4l2_queryctrl mt9v011_qctrl[] = { { .id = V4L2_CID_GAIN, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Gain", .minimum = 0, .maximum = (1 << 10) - 1, .step = 1, .default_value = 0x0020, .flags = 0, }, { .id = V4L2_CID_RED_BALANCE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Red Balance", .minimum = -1 << 9, .maximum = (1 << 9) - 1, .step = 1, .default_value = 0, .flags = 0, }, { .id = V4L2_CID_BLUE_BALANCE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Blue Balance", .minimum = -1 << 9, .maximum = (1 << 9) - 1, .step = 1, .default_value = 0, .flags = 0, }, }; struct mt9v011 { struct v4l2_subdev sd; u16 global_gain, red_bal, blue_bal; }; static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd) { return container_of(sd, struct mt9v011, sd); } static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr) { struct i2c_client *c = v4l2_get_subdevdata(sd); __be16 buffer; int rc, val; if (1 != (rc = i2c_master_send(c, &addr, 1))) v4l2_dbg(0, debug, sd, "i2c i/o error: rc == %d (should be 1)\n", rc); msleep(10); if (2 != (rc = i2c_master_recv(c, (char *)&buffer, 2))) v4l2_dbg(0, debug, sd, "i2c i/o error: rc == %d (should be 1)\n", rc); val = be16_to_cpu(buffer); v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val); return val; } static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr, u16 value) { struct i2c_client *c = v4l2_get_subdevdata(sd); unsigned char buffer[3]; int rc; buffer[0] = addr; buffer[1] = value >> 8; buffer[2] = value & 0xff; v4l2_dbg(2, debug, sd, "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value); if (3 != (rc = i2c_master_send(c, buffer, 3))) v4l2_dbg(0, debug, sd, "i2c i/o error: rc == %d (should be 3)\n", rc); } struct i2c_reg_value { unsigned char reg; u16 value; }; /* * Values used at the original driver * Some values are marked as Reserved at the datasheet */ static const struct i2c_reg_value mt9v011_init_default[] = { { R0D_MT9V011_RESET, 0x0001 }, { R0D_MT9V011_RESET, 0x0000 }, { R01_MT9V011_ROWSTART, 0x0008 }, { R02_MT9V011_COLSTART, 0x0014 }, { R03_MT9V011_HEIGHT, 0x01e0 }, { R04_MT9V011_WIDTH, 0x0280 }, { R05_MT9V011_HBLANK, 0x007b }, { R06_MT9V011_VBLANK, 0x001c }, { R09_MT9V011_SHUTTER_WIDTH, 0x0418 }, { R0A_MT9V011_CLK_SPEED, 0x0000 }, { R0C_MT9V011_SHUTTER_DELAY, 0x0000 }, { R1E_MT9V011_DIGITAL_ZOOM, 0x0000 }, { R20_MT9V011_READ_MODE, 0x1100 }, /* * Those registers are not docummented at the datasheet. * However, the original driver initializes them */ { 0x30, 0x0005 }, { 0x34, 0x0100 }, { 0x3d, 0x068f }, { 0x40, 0x01e0 }, { 0x52, 0x0100 }, { 0x58, 0x0038 }, /* Datasheet default 0x0078 */ { 0x59, 0x0723 }, /* Datasheet default 0x0703 */ { 0x62, 0x041a }, /* Datasheet default 0x0418 */ { R07_MT9V011_OUT_CTRL, 0x000a }, /* chip enable */ }; static void set_balance(struct v4l2_subdev *sd) { struct mt9v011 *core = to_mt9v011(sd); u16 green1_gain, green2_gain, blue_gain, red_gain; green1_gain = core->global_gain; green2_gain = core->global_gain; blue_gain = core->global_gain + core->global_gain * core->blue_bal / (1 << 9); red_gain = core->global_gain + core->global_gain * core->blue_bal / (1 << 9); mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain); mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain); mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain); mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain); } static int mt9v011_reset(struct v4l2_subdev *sd, u32 val) { u16 version; int i; version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION); if (version != MT9V011_VERSION) { v4l2_info(sd, "*** unknown micron chip detected (0x%04x.\n", version); return -EINVAL; } for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++) mt9v011_write(sd, mt9v011_init_default[i].reg, mt9v011_init_default[i].value); set_balance(sd); return 0; }; static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct mt9v011 *core = to_mt9v011(sd); v4l2_dbg(1, debug, sd, "g_ctrl called\n"); switch (ctrl->id) { case V4L2_CID_GAIN: ctrl->value = core->global_gain; return 0; case V4L2_CID_RED_BALANCE: ctrl->value = core->red_bal; return 0; case V4L2_CID_BLUE_BALANCE: ctrl->value = core->blue_bal; return 0; } return -EINVAL; } static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct mt9v011 *core = to_mt9v011(sd); u8 i, n; n = ARRAY_SIZE(mt9v011_qctrl); for (i = 0; i < n; i++) { if (ctrl->id != mt9v011_qctrl[i].id) continue; if (ctrl->value < mt9v011_qctrl[i].minimum || ctrl->value > mt9v011_qctrl[i].maximum) return -ERANGE; v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n", ctrl->id, ctrl->value); break; } switch (ctrl->id) { case V4L2_CID_GAIN: core->global_gain = ctrl->value; break; case V4L2_CID_RED_BALANCE: core->red_bal = ctrl->value; break; case V4L2_CID_BLUE_BALANCE: core->blue_bal = ctrl->value; break; default: return -EINVAL; } set_balance(sd); return 0; } #ifdef CONFIG_VIDEO_ADV_DEBUG static int mt9v011_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { struct i2c_client *client = v4l2_get_subdevdata(sd); if (!v4l2_chip_match_i2c_client(client, ®->match)) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; reg->val = mt9v011_read(sd, reg->reg & 0xff); reg->size = 2; return 0; } static int mt9v011_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { struct i2c_client *client = v4l2_get_subdevdata(sd); if (!v4l2_chip_match_i2c_client(client, ®->match)) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff); return 0; } #endif static int mt9v011_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) { struct i2c_client *client = v4l2_get_subdevdata(sd); return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011, MT9V011_VERSION); } static const struct v4l2_subdev_core_ops mt9v011_core_ops = { .g_ctrl = mt9v011_g_ctrl, .s_ctrl = mt9v011_s_ctrl, .reset = mt9v011_reset, .g_chip_ident = mt9v011_g_chip_ident, #ifdef CONFIG_VIDEO_ADV_DEBUG .g_register = mt9v011_g_register, .s_register = mt9v011_s_register, #endif }; static const struct v4l2_subdev_ops mt9v011_ops = { .core = &mt9v011_core_ops, }; /**************************************************************************** I2C Client & Driver ****************************************************************************/ static int mt9v011_probe(struct i2c_client *c, const struct i2c_device_id *id) { struct mt9v011 *core; struct v4l2_subdev *sd; /* Check if the adapter supports the needed features */ if (!i2c_check_functionality(c->adapter, I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) return -EIO; core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL); if (!core) return -ENOMEM; core->global_gain = 0x0024; sd = &core->sd; v4l2_i2c_subdev_init(sd, c, &mt9v011_ops); v4l_info(c, "chip found @ 0x%02x (%s)\n", c->addr << 1, c->adapter->name); return 0; } static int mt9v011_remove(struct i2c_client *c) { struct v4l2_subdev *sd = i2c_get_clientdata(c); v4l2_dbg(1, debug, sd, "mt9v011.c: removing mt9v011 adapter on address 0x%x\n", c->addr << 1); v4l2_device_unregister_subdev(sd); kfree(to_mt9v011(sd)); return 0; } /* ----------------------------------------------------------------------- */ static const struct i2c_device_id mt9v011_id[] = { { "mt9v011", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, mt9v011_id); static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "mt9v011", .probe = mt9v011_probe, .remove = mt9v011_remove, .id_table = mt9v011_id, };