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path: root/drivers/media/video/indycam.c
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Diffstat (limited to 'drivers/media/video/indycam.c')
-rw-r--r--drivers/media/video/indycam.c412
1 files changed, 412 insertions, 0 deletions
diff --git a/drivers/media/video/indycam.c b/drivers/media/video/indycam.c
new file mode 100644
index 000000000000..b2b0384cd4b9
--- /dev/null
+++ b/drivers/media/video/indycam.c
@@ -0,0 +1,412 @@
+/*
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/sched.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_DEBUG
+
+#define INDYCAM_MODULE_VERSION "0.0.3"
+
+MODULE_DESCRIPTION("SGI IndyCam driver");
+MODULE_VERSION(INDYCAM_MODULE_VERSION);
+MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
+MODULE_LICENSE("GPL");
+
+#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
+
+#define VINO_ADAPTER (I2C_ALGO_SGI | I2C_HW_SGI_VINO)
+
+struct indycam {
+ struct i2c_client *client;
+ int version;
+};
+
+static struct i2c_driver i2c_driver_indycam;
+
+static const unsigned char initseq[] = {
+ INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */
+ INDYCAM_SHUTTER_DEFAULT, /* 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, unsigned char reg,
+ unsigned char *value)
+{
+ int ret;
+
+ if (reg == INDYCAM_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 = (unsigned char)ret;
+
+ return 0;
+}
+
+static int indycam_write_reg(struct i2c_client *client, unsigned char reg,
+ unsigned char value)
+{
+ int err;
+
+ if ((reg == INDYCAM_BRIGHTNESS)
+ || (reg == INDYCAM_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, unsigned char reg,
+ unsigned char length, unsigned char *data)
+{
+ unsigned char i;
+ int err;
+
+ for (i = reg; 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;
+ unsigned char 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_controls(struct i2c_client *client,
+ struct indycam_control *ctrl)
+{
+ unsigned char ctrl_reg;
+
+ indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
+ ctrl->agc = (ctrl_reg & INDYCAM_CONTROL_AGCENA)
+ ? INDYCAM_VALUE_ENABLED
+ : INDYCAM_VALUE_DISABLED;
+ ctrl->awb = (ctrl_reg & INDYCAM_CONTROL_AWBCTL)
+ ? INDYCAM_VALUE_ENABLED
+ : INDYCAM_VALUE_DISABLED;
+ indycam_read_reg(client, INDYCAM_SHUTTER,
+ (unsigned char *)&ctrl->shutter);
+ indycam_read_reg(client, INDYCAM_GAIN,
+ (unsigned char *)&ctrl->gain);
+ indycam_read_reg(client, INDYCAM_RED_BALANCE,
+ (unsigned char *)&ctrl->red_balance);
+ indycam_read_reg(client, INDYCAM_BLUE_BALANCE,
+ (unsigned char *)&ctrl->blue_balance);
+ indycam_read_reg(client, INDYCAM_RED_SATURATION,
+ (unsigned char *)&ctrl->red_saturation);
+ indycam_read_reg(client, INDYCAM_BLUE_SATURATION,
+ (unsigned char *)&ctrl->blue_saturation);
+ indycam_read_reg(client, INDYCAM_GAMMA,
+ (unsigned char *)&ctrl->gamma);
+
+ return 0;
+}
+
+static int indycam_set_controls(struct i2c_client *client,
+ struct indycam_control *ctrl)
+{
+ unsigned char ctrl_reg;
+
+ indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
+ if (ctrl->agc != INDYCAM_VALUE_UNCHANGED) {
+ if (ctrl->agc)
+ ctrl_reg |= INDYCAM_CONTROL_AGCENA;
+ else
+ ctrl_reg &= ~INDYCAM_CONTROL_AGCENA;
+ }
+ if (ctrl->awb != INDYCAM_VALUE_UNCHANGED) {
+ if (ctrl->awb)
+ ctrl_reg |= INDYCAM_CONTROL_AWBCTL;
+ else
+ ctrl_reg &= ~INDYCAM_CONTROL_AWBCTL;
+ }
+ indycam_write_reg(client, INDYCAM_CONTROL, ctrl_reg);
+
+ if (ctrl->shutter >= 0)
+ indycam_write_reg(client, INDYCAM_SHUTTER, ctrl->shutter);
+ if (ctrl->gain >= 0)
+ indycam_write_reg(client, INDYCAM_GAIN, ctrl->gain);
+ if (ctrl->red_balance >= 0)
+ indycam_write_reg(client, INDYCAM_RED_BALANCE,
+ ctrl->red_balance);
+ if (ctrl->blue_balance >= 0)
+ indycam_write_reg(client, INDYCAM_BLUE_BALANCE,
+ ctrl->blue_balance);
+ if (ctrl->red_saturation >= 0)
+ indycam_write_reg(client, INDYCAM_RED_SATURATION,
+ ctrl->red_saturation);
+ if (ctrl->blue_saturation >= 0)
+ indycam_write_reg(client, INDYCAM_BLUE_SATURATION,
+ ctrl->blue_saturation);
+ if (ctrl->gamma >= 0)
+ indycam_write_reg(client, INDYCAM_GAMMA, ctrl->gamma);
+
+ return 0;
+}
+
+/* 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 = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (!client)
+ return -ENOMEM;
+ camera = kmalloc(sizeof(struct indycam), GFP_KERNEL);
+ if (!camera) {
+ err = -ENOMEM;
+ goto out_free_client;
+ }
+
+ memset(client, 0, sizeof(struct i2c_client));
+ memset(camera, 0, sizeof(struct indycam));
+
+ 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_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),
+ (unsigned char *)&initseq);
+ if (err) {
+ printk(KERN_ERR "IndyCam initalization failed\n");
+ err = -EIO;
+ goto out_detach_client;
+ }
+
+ indycam_regdump(client);
+
+ // white balance
+ err = indycam_write_reg(client, INDYCAM_CONTROL,
+ INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL);
+ if (err) {
+ printk(KERN_ERR "IndyCam white balance "
+ "initialization 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 == VINO_ADAPTER)
+ 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_CONTROLS: {
+ struct indycam_control *ctrl = arg;
+ indycam_get_controls(client, ctrl);
+ }
+ case DECODER_INDYCAM_SET_CONTROLS: {
+ struct indycam_control *ctrl = arg;
+ indycam_set_controls(client, ctrl);
+ }
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct i2c_driver i2c_driver_indycam = {
+ .owner = THIS_MODULE,
+ .name = "indycam",
+ .id = I2C_DRIVERID_INDYCAM,
+ .flags = I2C_DF_NOTIFY,
+ .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);