[PATCH] Indycam / VINO drivers

Rewrite of the Indycam / VINO video v4l2 drivers for the SGI Indy.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Mikael Nousiainen <tmnousia@cc.hut.fi>
Cc: <video4linux-list@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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 0000000..b2b0384
--- /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);