/* * adv7180.c Analog Devices ADV7180 video decoder driver * Copyright (c) 2009 Intel Corporation * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/i2c-id.h> #include <media/v4l2-ioctl.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> #include <media/v4l2-chip-ident.h> #include <linux/mutex.h> #define DRIVER_NAME "adv7180" #define ADV7180_INPUT_CONTROL_REG 0x00 #define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM 0x00 #define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM_PED 0x10 #define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_J_SECAM 0x20 #define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_M_SECAM 0x30 #define ADV7180_INPUT_CONTROL_NTSC_J 0x40 #define ADV7180_INPUT_CONTROL_NTSC_M 0x50 #define ADV7180_INPUT_CONTROL_PAL60 0x60 #define ADV7180_INPUT_CONTROL_NTSC_443 0x70 #define ADV7180_INPUT_CONTROL_PAL_BG 0x80 #define ADV7180_INPUT_CONTROL_PAL_N 0x90 #define ADV7180_INPUT_CONTROL_PAL_M 0xa0 #define ADV7180_INPUT_CONTROL_PAL_M_PED 0xb0 #define ADV7180_INPUT_CONTROL_PAL_COMB_N 0xc0 #define ADV7180_INPUT_CONTROL_PAL_COMB_N_PED 0xd0 #define ADV7180_INPUT_CONTROL_PAL_SECAM 0xe0 #define ADV7180_INPUT_CONTROL_PAL_SECAM_PED 0xf0 #define ADV7180_EXTENDED_OUTPUT_CONTROL_REG 0x04 #define ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS 0xC5 #define ADV7180_AUTODETECT_ENABLE_REG 0x07 #define ADV7180_AUTODETECT_DEFAULT 0x7f #define ADV7180_ADI_CTRL_REG 0x0e #define ADV7180_ADI_CTRL_IRQ_SPACE 0x20 #define ADV7180_STATUS1_REG 0x10 #define ADV7180_STATUS1_IN_LOCK 0x01 #define ADV7180_STATUS1_AUTOD_MASK 0x70 #define ADV7180_STATUS1_AUTOD_NTSM_M_J 0x00 #define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10 #define ADV7180_STATUS1_AUTOD_PAL_M 0x20 #define ADV7180_STATUS1_AUTOD_PAL_60 0x30 #define ADV7180_STATUS1_AUTOD_PAL_B_G 0x40 #define ADV7180_STATUS1_AUTOD_SECAM 0x50 #define ADV7180_STATUS1_AUTOD_PAL_COMB 0x60 #define ADV7180_STATUS1_AUTOD_SECAM_525 0x70 #define ADV7180_IDENT_REG 0x11 #define ADV7180_ID_7180 0x18 #define ADV7180_ICONF1_ADI 0x40 #define ADV7180_ICONF1_ACTIVE_LOW 0x01 #define ADV7180_ICONF1_PSYNC_ONLY 0x10 #define ADV7180_ICONF1_ACTIVE_TO_CLR 0xC0 #define ADV7180_IRQ1_LOCK 0x01 #define ADV7180_IRQ1_UNLOCK 0x02 #define ADV7180_ISR1_ADI 0x42 #define ADV7180_ICR1_ADI 0x43 #define ADV7180_IMR1_ADI 0x44 #define ADV7180_IMR2_ADI 0x48 #define ADV7180_IRQ3_AD_CHANGE 0x08 #define ADV7180_ISR3_ADI 0x4A #define ADV7180_ICR3_ADI 0x4B #define ADV7180_IMR3_ADI 0x4C #define ADV7180_IMR4_ADI 0x50 struct adv7180_state { struct v4l2_subdev sd; struct work_struct work; struct mutex mutex; /* mutual excl. when accessing chip */ int irq; v4l2_std_id curr_norm; bool autodetect; }; static v4l2_std_id adv7180_std_to_v4l2(u8 status1) { switch (status1 & ADV7180_STATUS1_AUTOD_MASK) { case ADV7180_STATUS1_AUTOD_NTSM_M_J: return V4L2_STD_NTSC; case ADV7180_STATUS1_AUTOD_NTSC_4_43: return V4L2_STD_NTSC_443; case ADV7180_STATUS1_AUTOD_PAL_M: return V4L2_STD_PAL_M; case ADV7180_STATUS1_AUTOD_PAL_60: return V4L2_STD_PAL_60; case ADV7180_STATUS1_AUTOD_PAL_B_G: return V4L2_STD_PAL; case ADV7180_STATUS1_AUTOD_SECAM: return V4L2_STD_SECAM; case ADV7180_STATUS1_AUTOD_PAL_COMB: return V4L2_STD_PAL_Nc | V4L2_STD_PAL_N; case ADV7180_STATUS1_AUTOD_SECAM_525: return V4L2_STD_SECAM; default: return V4L2_STD_UNKNOWN; } } static int v4l2_std_to_adv7180(v4l2_std_id std) { if (std == V4L2_STD_PAL_60) return ADV7180_INPUT_CONTROL_PAL60; if (std == V4L2_STD_NTSC_443) return ADV7180_INPUT_CONTROL_NTSC_443; if (std == V4L2_STD_PAL_N) return ADV7180_INPUT_CONTROL_PAL_N; if (std == V4L2_STD_PAL_M) return ADV7180_INPUT_CONTROL_PAL_M; if (std == V4L2_STD_PAL_Nc) return ADV7180_INPUT_CONTROL_PAL_COMB_N; if (std & V4L2_STD_PAL) return ADV7180_INPUT_CONTROL_PAL_BG; if (std & V4L2_STD_NTSC) return ADV7180_INPUT_CONTROL_NTSC_M; if (std & V4L2_STD_SECAM) return ADV7180_INPUT_CONTROL_PAL_SECAM; return -EINVAL; } static u32 adv7180_status_to_v4l2(u8 status1) { if (!(status1 & ADV7180_STATUS1_IN_LOCK)) return V4L2_IN_ST_NO_SIGNAL; return 0; } static int __adv7180_status(struct i2c_client *client, u32 *status, v4l2_std_id *std) { int status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG); if (status1 < 0) return status1; if (status) *status = adv7180_status_to_v4l2(status1); if (std) *std = adv7180_std_to_v4l2(status1); return 0; } static inline struct adv7180_state *to_state(struct v4l2_subdev *sd) { return container_of(sd, struct adv7180_state, sd); } static int adv7180_querystd(struct v4l2_subdev *sd, v4l2_std_id *std) { struct adv7180_state *state = to_state(sd); int err = mutex_lock_interruptible(&state->mutex); if (err) return err; /* when we are interrupt driven we know the state */ if (!state->autodetect || state->irq > 0) *std = state->curr_norm; else err = __adv7180_status(v4l2_get_subdevdata(sd), NULL, std); mutex_unlock(&state->mutex); return err; } static int adv7180_g_input_status(struct v4l2_subdev *sd, u32 *status) { struct adv7180_state *state = to_state(sd); int ret = mutex_lock_interruptible(&state->mutex); if (ret) return ret; ret = __adv7180_status(v4l2_get_subdevdata(sd), status, NULL); mutex_unlock(&state->mutex); return ret; } static int adv7180_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_ADV7180, 0); } static int adv7180_s_std(struct v4l2_subdev *sd, v4l2_std_id std) { struct adv7180_state *state = to_state(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = mutex_lock_interruptible(&state->mutex); if (ret) return ret; /* all standards -> autodetect */ if (std == V4L2_STD_ALL) { ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG, ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM); if (ret < 0) goto out; __adv7180_status(client, NULL, &state->curr_norm); state->autodetect = true; } else { ret = v4l2_std_to_adv7180(std); if (ret < 0) goto out; ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG, ret); if (ret < 0) goto out; state->curr_norm = std; state->autodetect = false; } ret = 0; out: mutex_unlock(&state->mutex); return ret; } static const struct v4l2_subdev_video_ops adv7180_video_ops = { .querystd = adv7180_querystd, .g_input_status = adv7180_g_input_status, }; static const struct v4l2_subdev_core_ops adv7180_core_ops = { .g_chip_ident = adv7180_g_chip_ident, .s_std = adv7180_s_std, }; static const struct v4l2_subdev_ops adv7180_ops = { .core = &adv7180_core_ops, .video = &adv7180_video_ops, }; static void adv7180_work(struct work_struct *work) { struct adv7180_state *state = container_of(work, struct adv7180_state, work); struct i2c_client *client = v4l2_get_subdevdata(&state->sd); u8 isr3; mutex_lock(&state->mutex); i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, ADV7180_ADI_CTRL_IRQ_SPACE); isr3 = i2c_smbus_read_byte_data(client, ADV7180_ISR3_ADI); /* clear */ i2c_smbus_write_byte_data(client, ADV7180_ICR3_ADI, isr3); i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, 0); if (isr3 & ADV7180_IRQ3_AD_CHANGE && state->autodetect) __adv7180_status(client, NULL, &state->curr_norm); mutex_unlock(&state->mutex); enable_irq(state->irq); } static irqreturn_t adv7180_irq(int irq, void *devid) { struct adv7180_state *state = devid; schedule_work(&state->work); disable_irq_nosync(state->irq); return IRQ_HANDLED; } /* * Generic i2c probe * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' */ static __devinit int adv7180_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct adv7180_state *state; struct v4l2_subdev *sd; int ret; /* Check if the adapter supports the needed features */ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -EIO; v4l_info(client, "chip found @ 0x%02x (%s)\n", client->addr << 1, client->adapter->name); state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL); if (state == NULL) { ret = -ENOMEM; goto err; } state->irq = client->irq; INIT_WORK(&state->work, adv7180_work); mutex_init(&state->mutex); state->autodetect = true; sd = &state->sd; v4l2_i2c_subdev_init(sd, client, &adv7180_ops); /* Initialize adv7180 */ /* Enable autodetection */ ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG, ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM); if (ret < 0) goto err_unreg_subdev; ret = i2c_smbus_write_byte_data(client, ADV7180_AUTODETECT_ENABLE_REG, ADV7180_AUTODETECT_DEFAULT); if (ret < 0) goto err_unreg_subdev; /* ITU-R BT.656-4 compatible */ ret = i2c_smbus_write_byte_data(client, ADV7180_EXTENDED_OUTPUT_CONTROL_REG, ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS); if (ret < 0) goto err_unreg_subdev; /* read current norm */ __adv7180_status(client, NULL, &state->curr_norm); /* register for interrupts */ if (state->irq > 0) { ret = request_irq(state->irq, adv7180_irq, 0, DRIVER_NAME, state); if (ret) goto err_unreg_subdev; ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, ADV7180_ADI_CTRL_IRQ_SPACE); if (ret < 0) goto err_unreg_subdev; /* config the Interrupt pin to be active low */ ret = i2c_smbus_write_byte_data(client, ADV7180_ICONF1_ADI, ADV7180_ICONF1_ACTIVE_LOW | ADV7180_ICONF1_PSYNC_ONLY); if (ret < 0) goto err_unreg_subdev; ret = i2c_smbus_write_byte_data(client, ADV7180_IMR1_ADI, 0); if (ret < 0) goto err_unreg_subdev; ret = i2c_smbus_write_byte_data(client, ADV7180_IMR2_ADI, 0); if (ret < 0) goto err_unreg_subdev; /* enable AD change interrupts interrupts */ ret = i2c_smbus_write_byte_data(client, ADV7180_IMR3_ADI, ADV7180_IRQ3_AD_CHANGE); if (ret < 0) goto err_unreg_subdev; ret = i2c_smbus_write_byte_data(client, ADV7180_IMR4_ADI, 0); if (ret < 0) goto err_unreg_subdev; ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, 0); if (ret < 0) goto err_unreg_subdev; } return 0; err_unreg_subdev: mutex_destroy(&state->mutex); v4l2_device_unregister_subdev(sd); kfree(state); err: printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", ret); return ret; } static __devexit int adv7180_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct adv7180_state *state = to_state(sd); if (state->irq > 0) { free_irq(client->irq, state); if (cancel_work_sync(&state->work)) { /* * Work was pending, therefore we need to enable * IRQ here to balance the disable_irq() done in the * interrupt handler. */ enable_irq(state->irq); } } mutex_destroy(&state->mutex); v4l2_device_unregister_subdev(sd); kfree(to_state(sd)); return 0; } static const struct i2c_device_id adv7180_id[] = { {DRIVER_NAME, 0}, {}, }; MODULE_DEVICE_TABLE(i2c, adv7180_id); static struct i2c_driver adv7180_driver = { .driver = { .owner = THIS_MODULE, .name = DRIVER_NAME, }, .probe = adv7180_probe, .remove = __devexit_p(adv7180_remove), .id_table = adv7180_id, }; static __init int adv7180_init(void) { return i2c_add_driver(&adv7180_driver); } static __exit void adv7180_exit(void) { i2c_del_driver(&adv7180_driver); } module_init(adv7180_init); module_exit(adv7180_exit); MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver"); MODULE_AUTHOR("Mocean Laboratories"); MODULE_LICENSE("GPL v2");