diff options
Diffstat (limited to 'drivers/media/video/indycam.c')
| -rw-r--r-- | drivers/media/video/indycam.c | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/drivers/media/video/indycam.c b/drivers/media/video/indycam.c new file mode 100644 index 0000000..84b9e4f --- /dev/null +++ b/drivers/media/video/indycam.c @@ -0,0 +1,470 @@ +/* + * indycam.c - Silicon Graphics IndyCam digital camera driver + * + * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org> + * Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi> + * + * 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. + */ + +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/major.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/slab.h> + +#include <linux/videodev.h> +/* IndyCam decodes stream of photons into digital image representation ;-) */ +#include <linux/video_decoder.h> +#include <linux/i2c.h> + +#include "indycam.h" + +#define INDYCAM_MODULE_VERSION "0.0.5" + +MODULE_DESCRIPTION("SGI IndyCam driver"); +MODULE_VERSION(INDYCAM_MODULE_VERSION); +MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>"); +MODULE_LICENSE("GPL"); + +// #define INDYCAM_DEBUG + +#ifdef INDYCAM_DEBUG +#define dprintk(x...) printk("IndyCam: " x); +#define indycam_regdump(client) indycam_regdump_debug(client) +#else +#define dprintk(x...) +#define indycam_regdump(client) +#endif + +struct indycam { + struct i2c_client *client; + u8 version; +}; + +static struct i2c_driver i2c_driver_indycam; + +static const u8 initseq[] = { + INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */ + INDYCAM_SHUTTER_60, /* INDYCAM_SHUTTER */ + INDYCAM_GAIN_DEFAULT, /* INDYCAM_GAIN */ + 0x00, /* INDYCAM_BRIGHTNESS (read-only) */ + INDYCAM_RED_BALANCE_DEFAULT, /* INDYCAM_RED_BALANCE */ + INDYCAM_BLUE_BALANCE_DEFAULT, /* INDYCAM_BLUE_BALANCE */ + INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */ + INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */ +}; + +/* IndyCam register handling */ + +static int indycam_read_reg(struct i2c_client *client, u8 reg, u8 *value) +{ + int ret; + + if (reg == INDYCAM_REG_RESET) { + dprintk("indycam_read_reg(): " + "skipping write-only register %d\n", reg); + *value = 0; + return 0; + } + + ret = i2c_smbus_read_byte_data(client, reg); + + if (ret < 0) { + printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, " + "register = 0x%02x\n", reg); + return ret; + } + + *value = (u8)ret; + + return 0; +} + +static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value) +{ + int err; + + if ((reg == INDYCAM_REG_BRIGHTNESS) + || (reg == INDYCAM_REG_VERSION)) { + dprintk("indycam_write_reg(): " + "skipping read-only register %d\n", reg); + return 0; + } + + dprintk("Writing Reg %d = 0x%02x\n", reg, value); + err = i2c_smbus_write_byte_data(client, reg, value); + + if (err) { + printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, " + "register = 0x%02x, value = 0x%02x\n", reg, value); + } + return err; +} + +static int indycam_write_block(struct i2c_client *client, u8 reg, + u8 length, u8 *data) +{ + int i, err; + + for (i = 0; i < length; i++) { + err = indycam_write_reg(client, reg + i, data[i]); + if (err) + return err; + } + + return 0; +} + +/* Helper functions */ + +#ifdef INDYCAM_DEBUG +static void indycam_regdump_debug(struct i2c_client *client) +{ + int i; + u8 val; + + for (i = 0; i < 9; i++) { + indycam_read_reg(client, i, &val); + dprintk("Reg %d = 0x%02x\n", i, val); + } +} +#endif + +static int indycam_get_control(struct i2c_client *client, + struct indycam_control *ctrl) +{ + struct indycam *camera = i2c_get_clientdata(client); + u8 reg; + int ret = 0; + + switch (ctrl->type) { + case INDYCAM_CONTROL_AGC: + case INDYCAM_CONTROL_AWB: + ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, ®); + if (ret) + return -EIO; + if (ctrl->type == INDYCAM_CONTROL_AGC) + ctrl->value = (reg & INDYCAM_CONTROL_AGCENA) + ? 1 : 0; + else + ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL) + ? 1 : 0; + break; + case INDYCAM_CONTROL_SHUTTER: + ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, ®); + if (ret) + return -EIO; + ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1); + break; + case INDYCAM_CONTROL_GAIN: + ret = indycam_read_reg(client, INDYCAM_REG_GAIN, ®); + if (ret) + return -EIO; + ctrl->value = (s32)reg; + break; + case INDYCAM_CONTROL_RED_BALANCE: + ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, ®); + if (ret) + return -EIO; + ctrl->value = (s32)reg; + break; + case INDYCAM_CONTROL_BLUE_BALANCE: + ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, ®); + if (ret) + return -EIO; + ctrl->value = (s32)reg; + break; + case INDYCAM_CONTROL_RED_SATURATION: + ret = indycam_read_reg(client, + INDYCAM_REG_RED_SATURATION, ®); + if (ret) + return -EIO; + ctrl->value = (s32)reg; + break; + case INDYCAM_CONTROL_BLUE_SATURATION: + ret = indycam_read_reg(client, + INDYCAM_REG_BLUE_SATURATION, ®); + if (ret) + return -EIO; + ctrl->value = (s32)reg; + break; + case INDYCAM_CONTROL_GAMMA: + if (camera->version == CAMERA_VERSION_MOOSE) { + ret = indycam_read_reg(client, + INDYCAM_REG_GAMMA, ®); + if (ret) + return -EIO; + ctrl->value = (s32)reg; + } else { + ctrl->value = INDYCAM_GAMMA_DEFAULT; + } + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int indycam_set_control(struct i2c_client *client, + struct indycam_control *ctrl) +{ + struct indycam *camera = i2c_get_clientdata(client); + u8 reg; + int ret = 0; + + switch (ctrl->type) { + case INDYCAM_CONTROL_AGC: + case INDYCAM_CONTROL_AWB: + ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, ®); + if (ret) + break; + + if (ctrl->type == INDYCAM_CONTROL_AGC) { + if (ctrl->value) + reg |= INDYCAM_CONTROL_AGCENA; + else + reg &= ~INDYCAM_CONTROL_AGCENA; + } else { + if (ctrl->value) + reg |= INDYCAM_CONTROL_AWBCTL; + else + reg &= ~INDYCAM_CONTROL_AWBCTL; + } + + ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg); + break; + case INDYCAM_CONTROL_SHUTTER: + reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1); + ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg); + break; + case INDYCAM_CONTROL_GAIN: + ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value); + break; + case INDYCAM_CONTROL_RED_BALANCE: + ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE, + ctrl->value); + break; + case INDYCAM_CONTROL_BLUE_BALANCE: + ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE, + ctrl->value); + break; + case INDYCAM_CONTROL_RED_SATURATION: + ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION, + ctrl->value); + break; + case INDYCAM_CONTROL_BLUE_SATURATION: + ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION, + ctrl->value); + break; + case INDYCAM_CONTROL_GAMMA: + if (camera->version == CAMERA_VERSION_MOOSE) { + ret = indycam_write_reg(client, INDYCAM_REG_GAMMA, + ctrl->value); + } + break; + default: + ret = -EINVAL; + } + + return ret; +} + +/* I2C-interface */ + +static int indycam_attach(struct i2c_adapter *adap, int addr, int kind) +{ + int err = 0; + struct indycam *camera; + struct i2c_client *client; + + printk(KERN_INFO "SGI IndyCam driver version %s\n", + INDYCAM_MODULE_VERSION); + + client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); + if (!client) + return -ENOMEM; + camera = kzalloc(sizeof(struct indycam), GFP_KERNEL); + if (!camera) { + err = -ENOMEM; + goto out_free_client; + } + + client->addr = addr; + client->adapter = adap; + client->driver = &i2c_driver_indycam; + client->flags = 0; + strcpy(client->name, "IndyCam client"); + i2c_set_clientdata(client, camera); + + camera->client = client; + + err = i2c_attach_client(client); + if (err) + goto out_free_camera; + + camera->version = i2c_smbus_read_byte_data(client, + INDYCAM_REG_VERSION); + if (camera->version != CAMERA_VERSION_INDY && + camera->version != CAMERA_VERSION_MOOSE) { + err = -ENODEV; + goto out_detach_client; + } + printk(KERN_INFO "IndyCam v%d.%d detected\n", + INDYCAM_VERSION_MAJOR(camera->version), + INDYCAM_VERSION_MINOR(camera->version)); + + indycam_regdump(client); + + // initialize + err = indycam_write_block(client, 0, sizeof(initseq), (u8 *)&initseq); + if (err) { + printk(KERN_ERR "IndyCam initialization failed\n"); + err = -EIO; + goto out_detach_client; + } + + indycam_regdump(client); + + // white balance + err = indycam_write_reg(client, INDYCAM_REG_CONTROL, + INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL); + if (err) { + printk(KERN_ERR "IndyCam: White balancing camera failed\n"); + err = -EIO; + goto out_detach_client; + } + + indycam_regdump(client); + + printk(KERN_INFO "IndyCam initialized\n"); + + return 0; + +out_detach_client: + i2c_detach_client(client); +out_free_camera: + kfree(camera); +out_free_client: + kfree(client); + return err; +} + +static int indycam_probe(struct i2c_adapter *adap) +{ + /* Indy specific crap */ + if (adap->id == I2C_HW_SGI_VINO) + return indycam_attach(adap, INDYCAM_ADDR, 0); + /* Feel free to add probe here :-) */ + return -ENODEV; +} + +static int indycam_detach(struct i2c_client *client) +{ + struct indycam *camera = i2c_get_clientdata(client); + + i2c_detach_client(client); + kfree(camera); + kfree(client); + return 0; +} + +static int indycam_command(struct i2c_client *client, unsigned int cmd, + void *arg) +{ + // struct indycam *camera = i2c_get_clientdata(client); + + /* The old video_decoder interface just isn't enough, + * so we'll use some custom commands. */ + switch (cmd) { + case DECODER_GET_CAPABILITIES: { + struct video_decoder_capability *cap = arg; + + cap->flags = VIDEO_DECODER_NTSC; + cap->inputs = 1; + cap->outputs = 1; + break; + } + case DECODER_GET_STATUS: { + int *iarg = arg; + + *iarg = DECODER_STATUS_GOOD | DECODER_STATUS_NTSC | + DECODER_STATUS_COLOR; + break; + } + case DECODER_SET_NORM: { + int *iarg = arg; + + switch (*iarg) { + case VIDEO_MODE_NTSC: + break; + default: + return -EINVAL; + } + break; + } + case DECODER_SET_INPUT: { + int *iarg = arg; + + if (*iarg != 0) + return -EINVAL; + break; + } + case DECODER_SET_OUTPUT: { + int *iarg = arg; + + if (*iarg != 0) + return -EINVAL; + break; + } + case DECODER_ENABLE_OUTPUT: { + /* Always enabled */ + break; + } + case DECODER_SET_PICTURE: { + // struct video_picture *pic = arg; + /* TODO: convert values for indycam_set_controls() */ + break; + } + case DECODER_INDYCAM_GET_CONTROL: { + return indycam_get_control(client, arg); + } + case DECODER_INDYCAM_SET_CONTROL: { + return indycam_set_control(client, arg); + } + default: + return -EINVAL; + } + + return 0; +} + +static struct i2c_driver i2c_driver_indycam = { + .driver = { + .name = "indycam", + }, + .id = I2C_DRIVERID_INDYCAM, + .attach_adapter = indycam_probe, + .detach_client = indycam_detach, + .command = indycam_command, +}; + +static int __init indycam_init(void) +{ + return i2c_add_driver(&i2c_driver_indycam); +} + +static void __exit indycam_exit(void) +{ + i2c_del_driver(&i2c_driver_indycam); +} + +module_init(indycam_init); +module_exit(indycam_exit); |
