[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 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);