diff options
Diffstat (limited to 'drivers/media/video/ovcamchip/ovcamchip_core.c')
| -rw-r--r-- | drivers/media/video/ovcamchip/ovcamchip_core.c | 395 |
1 files changed, 0 insertions, 395 deletions
diff --git a/drivers/media/video/ovcamchip/ovcamchip_core.c b/drivers/media/video/ovcamchip/ovcamchip_core.c deleted file mode 100644 index d573d8428998..000000000000 --- a/drivers/media/video/ovcamchip/ovcamchip_core.c +++ /dev/null @@ -1,395 +0,0 @@ -/* Shared Code for OmniVision Camera Chip Drivers - * - * Copyright (c) 2004 Mark McClelland <mark@alpha.dyndns.org> - * http://alpha.dyndns.org/ov511/ - * - * 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. NO WARRANTY OF ANY KIND is expressed or implied. - */ - -#define DEBUG - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/i2c.h> -#include <media/v4l2-device.h> -#include <media/v4l2-i2c-drv.h> -#include "ovcamchip_priv.h" - -#define DRIVER_VERSION "v2.27 for Linux 2.6" -#define DRIVER_AUTHOR "Mark McClelland <mark@alpha.dyndns.org>" -#define DRIVER_DESC "OV camera chip I2C driver" - -#define PINFO(fmt, args...) printk(KERN_INFO "ovcamchip: " fmt "\n" , ## args); -#define PERROR(fmt, args...) printk(KERN_ERR "ovcamchip: " fmt "\n" , ## args); - -#ifdef DEBUG -int ovcamchip_debug = 0; -static int debug; -module_param(debug, int, 0); -MODULE_PARM_DESC(debug, - "Debug level: 0=none, 1=inits, 2=warning, 3=config, 4=functions, 5=all"); -#endif - -/* By default, let bridge driver tell us if chip is monochrome. mono=0 - * will ignore that and always treat chips as color. mono=1 will force - * monochrome mode for all chips. */ -static int mono = -1; -module_param(mono, int, 0); -MODULE_PARM_DESC(mono, - "1=chips are monochrome (OVx1xx), 0=force color, -1=autodetect (default)"); - -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_LICENSE("GPL"); - - -/* Registers common to all chips, that are needed for detection */ -#define GENERIC_REG_ID_HIGH 0x1C /* manufacturer ID MSB */ -#define GENERIC_REG_ID_LOW 0x1D /* manufacturer ID LSB */ -#define GENERIC_REG_COM_I 0x29 /* misc ID bits */ - -static char *chip_names[NUM_CC_TYPES] = { - [CC_UNKNOWN] = "Unknown chip", - [CC_OV76BE] = "OV76BE", - [CC_OV7610] = "OV7610", - [CC_OV7620] = "OV7620", - [CC_OV7620AE] = "OV7620AE", - [CC_OV6620] = "OV6620", - [CC_OV6630] = "OV6630", - [CC_OV6630AE] = "OV6630AE", - [CC_OV6630AF] = "OV6630AF", -}; - -/* ----------------------------------------------------------------------- */ - -int ov_write_regvals(struct i2c_client *c, struct ovcamchip_regvals *rvals) -{ - int rc; - - while (rvals->reg != 0xff) { - rc = ov_write(c, rvals->reg, rvals->val); - if (rc < 0) - return rc; - rvals++; - } - - return 0; -} - -/* Writes bits at positions specified by mask to an I2C reg. Bits that are in - * the same position as 1's in "mask" are cleared and set to "value". Bits - * that are in the same position as 0's in "mask" are preserved, regardless - * of their respective state in "value". - */ -int ov_write_mask(struct i2c_client *c, - unsigned char reg, - unsigned char value, - unsigned char mask) -{ - int rc; - unsigned char oldval, newval; - - if (mask == 0xff) { - newval = value; - } else { - rc = ov_read(c, reg, &oldval); - if (rc < 0) - return rc; - - oldval &= (~mask); /* Clear the masked bits */ - value &= mask; /* Enforce mask on value */ - newval = oldval | value; /* Set the desired bits */ - } - - return ov_write(c, reg, newval); -} - -/* ----------------------------------------------------------------------- */ - -/* Reset the chip and ensure that I2C is synchronized. Returns <0 if failure. - */ -static int init_camchip(struct i2c_client *c) -{ - int i, success; - unsigned char high, low; - - /* Reset the chip */ - ov_write(c, 0x12, 0x80); - - /* Wait for it to initialize */ - msleep(150); - - for (i = 0, success = 0; i < I2C_DETECT_RETRIES && !success; i++) { - if (ov_read(c, GENERIC_REG_ID_HIGH, &high) >= 0) { - if (ov_read(c, GENERIC_REG_ID_LOW, &low) >= 0) { - if (high == 0x7F && low == 0xA2) { - success = 1; - continue; - } - } - } - - /* Reset the chip */ - ov_write(c, 0x12, 0x80); - - /* Wait for it to initialize */ - msleep(150); - - /* Dummy read to sync I2C */ - ov_read(c, 0x00, &low); - } - - if (!success) - return -EIO; - - PDEBUG(1, "I2C synced in %d attempt(s)", i); - - return 0; -} - -/* This detects the OV7610, OV7620, or OV76BE chip. */ -static int ov7xx0_detect(struct i2c_client *c) -{ - struct ovcamchip *ov = i2c_get_clientdata(c); - int rc; - unsigned char val; - - PDEBUG(4, ""); - - /* Detect chip (sub)type */ - rc = ov_read(c, GENERIC_REG_COM_I, &val); - if (rc < 0) { - PERROR("Error detecting ov7xx0 type"); - return rc; - } - - if ((val & 3) == 3) { - PINFO("Camera chip is an OV7610"); - ov->subtype = CC_OV7610; - } else if ((val & 3) == 1) { - rc = ov_read(c, 0x15, &val); - if (rc < 0) { - PERROR("Error detecting ov7xx0 type"); - return rc; - } - - if (val & 1) { - PINFO("Camera chip is an OV7620AE"); - /* OV7620 is a close enough match for now. There are - * some definite differences though, so this should be - * fixed */ - ov->subtype = CC_OV7620; - } else { - PINFO("Camera chip is an OV76BE"); - ov->subtype = CC_OV76BE; - } - } else if ((val & 3) == 0) { - PINFO("Camera chip is an OV7620"); - ov->subtype = CC_OV7620; - } else { - PERROR("Unknown camera chip version: %d", val & 3); - return -ENOSYS; - } - - if (ov->subtype == CC_OV76BE) - ov->sops = &ov76be_ops; - else if (ov->subtype == CC_OV7620) - ov->sops = &ov7x20_ops; - else - ov->sops = &ov7x10_ops; - - return 0; -} - -/* This detects the OV6620, OV6630, OV6630AE, or OV6630AF chip. */ -static int ov6xx0_detect(struct i2c_client *c) -{ - struct ovcamchip *ov = i2c_get_clientdata(c); - int rc; - unsigned char val; - - PDEBUG(4, ""); - - /* Detect chip (sub)type */ - rc = ov_read(c, GENERIC_REG_COM_I, &val); - if (rc < 0) { - PERROR("Error detecting ov6xx0 type"); - return -1; - } - - if ((val & 3) == 0) { - ov->subtype = CC_OV6630; - PINFO("Camera chip is an OV6630"); - } else if ((val & 3) == 1) { - ov->subtype = CC_OV6620; - PINFO("Camera chip is an OV6620"); - } else if ((val & 3) == 2) { - ov->subtype = CC_OV6630; - PINFO("Camera chip is an OV6630AE"); - } else if ((val & 3) == 3) { - ov->subtype = CC_OV6630; - PINFO("Camera chip is an OV6630AF"); - } - - if (ov->subtype == CC_OV6620) - ov->sops = &ov6x20_ops; - else - ov->sops = &ov6x30_ops; - - return 0; -} - -static int ovcamchip_detect(struct i2c_client *c) -{ - /* Ideally we would just try a single register write and see if it NAKs. - * That isn't possible since the OV518 can't report I2C transaction - * failures. So, we have to try to initialize the chip (i.e. reset it - * and check the ID registers) to detect its presence. */ - - /* Test for 7xx0 */ - PDEBUG(3, "Testing for 0V7xx0"); - if (init_camchip(c) < 0) - return -ENODEV; - /* 7-bit addresses with bit 0 set are for the OV7xx0 */ - if (c->addr & 1) { - if (ov7xx0_detect(c) < 0) { - PERROR("Failed to init OV7xx0"); - return -EIO; - } - return 0; - } - /* Test for 6xx0 */ - PDEBUG(3, "Testing for 0V6xx0"); - if (ov6xx0_detect(c) < 0) { - PERROR("Failed to init OV6xx0"); - return -EIO; - } - return 0; -} - -/* ----------------------------------------------------------------------- */ - -static long ovcamchip_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) -{ - struct ovcamchip *ov = to_ovcamchip(sd); - struct i2c_client *c = v4l2_get_subdevdata(sd); - - if (!ov->initialized && - cmd != OVCAMCHIP_CMD_Q_SUBTYPE && - cmd != OVCAMCHIP_CMD_INITIALIZE) { - v4l2_err(sd, "Camera chip not initialized yet!\n"); - return -EPERM; - } - - switch (cmd) { - case OVCAMCHIP_CMD_Q_SUBTYPE: - { - *(int *)arg = ov->subtype; - return 0; - } - case OVCAMCHIP_CMD_INITIALIZE: - { - int rc; - - if (mono == -1) - ov->mono = *(int *)arg; - else - ov->mono = mono; - - if (ov->mono) { - if (ov->subtype != CC_OV7620) - v4l2_warn(sd, "Monochrome not " - "implemented for this chip\n"); - else - v4l2_info(sd, "Initializing chip as " - "monochrome\n"); - } - - rc = ov->sops->init(c); - if (rc < 0) - return rc; - - ov->initialized = 1; - return 0; - } - default: - return ov->sops->command(c, cmd, arg); - } -} - -/* ----------------------------------------------------------------------- */ - -static const struct v4l2_subdev_core_ops ovcamchip_core_ops = { - .ioctl = ovcamchip_ioctl, -}; - -static const struct v4l2_subdev_ops ovcamchip_ops = { - .core = &ovcamchip_core_ops, -}; - -static int ovcamchip_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct ovcamchip *ov; - struct v4l2_subdev *sd; - int rc = 0; - - ov = kzalloc(sizeof *ov, GFP_KERNEL); - if (!ov) { - rc = -ENOMEM; - goto no_ov; - } - sd = &ov->sd; - v4l2_i2c_subdev_init(sd, client, &ovcamchip_ops); - - rc = ovcamchip_detect(client); - if (rc < 0) - goto error; - - v4l_info(client, "%s found @ 0x%02x (%s)\n", - chip_names[ov->subtype], client->addr << 1, client->adapter->name); - - PDEBUG(1, "Camera chip detection complete"); - - return rc; -error: - kfree(ov); -no_ov: - PDEBUG(1, "returning %d", rc); - return rc; -} - -static int ovcamchip_remove(struct i2c_client *client) -{ - struct v4l2_subdev *sd = i2c_get_clientdata(client); - struct ovcamchip *ov = to_ovcamchip(sd); - int rc; - - v4l2_device_unregister_subdev(sd); - rc = ov->sops->free(client); - if (rc < 0) - return rc; - - kfree(ov); - return 0; -} - -/* ----------------------------------------------------------------------- */ - -static const struct i2c_device_id ovcamchip_id[] = { - { "ovcamchip", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, ovcamchip_id); - -static struct v4l2_i2c_driver_data v4l2_i2c_data = { - .name = "ovcamchip", - .probe = ovcamchip_probe, - .remove = ovcamchip_remove, - .id_table = ovcamchip_id, -}; |