[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, 512 insertions, 0 deletions

diff --git a/drivers/media/video/saa7191.c b/drivers/media/video/saa7191.c
new file mode 100644
index 000000000000..454f5c1199b4
--- /dev/null
+++ b/drivers/media/video/saa7191.c
@@ -0,0 +1,512 @@
+/*
+ *  saa7191.c - Philips SAA7191 video decoder 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>
+#include <linux/video_decoder.h>
+#include <linux/i2c.h>
+
+#include "saa7191.h"
+
+#define SAA7191_MODULE_VERSION "0.0.3"
+
+MODULE_DESCRIPTION("Philips SAA7191 video decoder driver");
+MODULE_VERSION(SAA7191_MODULE_VERSION);
+MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
+MODULE_LICENSE("GPL");
+
+#define VINO_ADAPTER    (I2C_ALGO_SGI | I2C_HW_SGI_VINO)
+
+struct saa7191 {
+        struct i2c_client *client;
+
+        /* the register values are stored here as the actual
+         * I2C-registers are write-only */
+        unsigned char reg[25];
+
+        unsigned char norm;
+        unsigned char input;
+};
+
+static struct i2c_driver i2c_driver_saa7191;
+
+static const unsigned char initseq[] = {
+        0,      /* Subaddress */
+        0x50,   /* SAA7191_REG_IDEL */
+        0x30,   /* SAA7191_REG_HSYB */
+        0x00,   /* SAA7191_REG_HSYS */
+        0xe8,   /* SAA7191_REG_HCLB */
+        0xb6,   /* SAA7191_REG_HCLS */
+        0xf4,   /* SAA7191_REG_HPHI */
+        0x01,   /* SAA7191_REG_LUMA - chrominance trap active (CVBS) */
+        0x00,   /* SAA7191_REG_HUEC */
+        0xf8,   /* SAA7191_REG_CKTQ */
+        0xf8,   /* SAA7191_REG_CKTS */
+        0x90,   /* SAA7191_REG_PLSE */
+        0x90,   /* SAA7191_REG_SESE */
+        0x00,   /* SAA7191_REG_GAIN */
+        0x0c,   /* SAA7191_REG_STDC - not SECAM, slow time constant */
+        0x78,   /* SAA7191_REG_IOCK - chrominance from CVBS, GPSW1 & 2 off */
+        0x99,   /* SAA7191_REG_CTL3 - automatic field detection */
+        0x00,   /* SAA7191_REG_CTL4 */
+        0x2c,   /* SAA7191_REG_CHCV */
+        0x00,   /* unused */
+        0x00,   /* unused */
+        0x34,   /* SAA7191_REG_HS6B */
+        0x0a,   /* SAA7191_REG_HS6S */
+        0xf4,   /* SAA7191_REG_HC6B */
+        0xce,   /* SAA7191_REG_HC6S */
+        0xf4,   /* SAA7191_REG_HP6I */
+};
+
+/* SAA7191 register handling */
+
+static unsigned char saa7191_read_reg(struct i2c_client *client,
+                                      unsigned char reg)
+{
+        return ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg];
+}
+
+static int saa7191_read_status(struct i2c_client *client,
+                               unsigned char *value)
+{
+        int ret;
+
+        ret = i2c_master_recv(client, value, 1);
+        if (ret < 0) {
+                printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed");
+                return ret;
+        }
+
+        return 0;
+}
+
+
+static int saa7191_write_reg(struct i2c_client *client, unsigned char reg,
+                             unsigned char value)
+{
+
+        ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg] = value;
+        return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+/* the first byte of data must be the first subaddress number (register) */
+static int saa7191_write_block(struct i2c_client *client,
+                               unsigned char length, unsigned char *data)
+{
+        int i;
+        int ret;
+
+        struct saa7191 *decoder = (struct saa7191 *)i2c_get_clientdata(client);
+        for (i = 0; i < (length - 1); i++) {
+                decoder->reg[data[0] + i] = data[i + 1];
+        }
+
+        ret = i2c_master_send(client, data, length);
+        if (ret < 0) {
+                printk(KERN_ERR "SAA7191: saa7191_write_block(): "
+                       "write failed");
+                return ret;
+        }
+
+        return 0;
+}
+
+/* Helper functions */
+
+static int saa7191_set_input(struct i2c_client *client, int input)
+{
+        unsigned char luma = saa7191_read_reg(client, SAA7191_REG_LUMA);
+        unsigned char iock = saa7191_read_reg(client, SAA7191_REG_IOCK);
+        int err;
+
+        switch (input) {
+        case SAA7191_INPUT_COMPOSITE: /* Set Composite input */
+                iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1
+                          | SAA7191_IOCK_GPSW2);
+                /* Chrominance trap active */
+                luma &= ~SAA7191_LUMA_BYPS;
+                break;
+        case SAA7191_INPUT_SVIDEO: /* Set S-Video input */
+                iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2;
+                /* Chrominance trap bypassed */
+                luma |= SAA7191_LUMA_BYPS;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        err = saa7191_write_reg(client, SAA7191_REG_LUMA, luma);
+        if (err)
+                return -EIO;
+        err = saa7191_write_reg(client, SAA7191_REG_IOCK, iock);
+        if (err)
+                return -EIO;
+
+        return 0;
+}
+
+static int saa7191_set_norm(struct i2c_client *client, int norm)
+{
+        struct saa7191 *decoder = i2c_get_clientdata(client);
+        unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC);
+        unsigned char ctl3 = saa7191_read_reg(client, SAA7191_REG_CTL3);
+        unsigned char chcv = saa7191_read_reg(client, SAA7191_REG_CHCV);
+        int err;
+
+        switch(norm) {
+        case SAA7191_NORM_AUTO: {
+                unsigned char status;
+
+                // does status depend on current norm ?
+                if (saa7191_read_status(client, &status))
+                        return -EIO;
+
+                stdc &= ~SAA7191_STDC_SECS;
+                ctl3 &= ~SAA7191_CTL3_FSEL;
+                ctl3 |= SAA7191_CTL3_AUFD;
+                chcv = (status & SAA7191_STATUS_FIDT)
+                               ? SAA7191_CHCV_NTSC : SAA7191_CHCV_PAL;
+                break;
+        }
+        case SAA7191_NORM_PAL:
+                stdc &= ~SAA7191_STDC_SECS;
+                ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
+                chcv = SAA7191_CHCV_PAL;
+                break;
+        case SAA7191_NORM_NTSC:
+                stdc &= ~SAA7191_STDC_SECS;
+                ctl3 &= ~SAA7191_CTL3_AUFD;
+                ctl3 |= SAA7191_CTL3_FSEL;
+                chcv = SAA7191_CHCV_NTSC;
+                break;
+        case SAA7191_NORM_SECAM:
+                stdc |= SAA7191_STDC_SECS;
+                ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
+                chcv = SAA7191_CHCV_PAL;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3);
+        if (err)
+                return -EIO;
+        err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc);
+        if (err)
+                return -EIO;
+        err = saa7191_write_reg(client, SAA7191_REG_CHCV, chcv);
+        if (err)
+                return -EIO;
+
+        decoder->norm = norm;
+
+        return 0;
+}
+
+static int saa7191_get_controls(struct i2c_client *client,
+                                struct saa7191_control *ctrl)
+{
+        unsigned char hue = saa7191_read_reg(client, SAA7191_REG_HUEC);
+        unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC);
+
+        if (hue < 0x80) {
+                hue += 0x80;
+        } else {
+                hue -= 0x80;
+        }
+        ctrl->hue = hue;
+
+        ctrl->vtrc = (stdc & SAA7191_STDC_VTRC)
+                ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
+
+        return 0;
+}
+
+static int saa7191_set_controls(struct i2c_client *client,
+                                struct saa7191_control *ctrl)
+{
+        int err;
+
+        if (ctrl->hue >= 0) {
+                unsigned char hue = ctrl->hue & 0xff;
+                if (hue < 0x80) {
+                        hue += 0x80;
+                } else {
+                        hue -= 0x80;
+                }
+                err = saa7191_write_reg(client, SAA7191_REG_HUEC, hue);
+                if (err)
+                        return -EIO;
+        }
+        if (ctrl->vtrc >= 0) {
+                unsigned char stdc =
+                        saa7191_read_reg(client, SAA7191_REG_STDC);
+
+                if (ctrl->vtrc) {
+                        stdc |= SAA7191_STDC_VTRC;
+                } else {
+                        stdc &= ~SAA7191_STDC_VTRC;
+                }
+
+                err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc);
+                if (err)
+                        return -EIO;
+        }
+
+        return 0;
+}
+
+/* I2C-interface */
+
+static int saa7191_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+        int err = 0;
+        struct saa7191 *decoder;
+        struct i2c_client *client;
+
+        printk(KERN_INFO "Philips SAA7191 driver version %s\n",
+               SAA7191_MODULE_VERSION);
+
+        client = kmalloc(sizeof(*client), GFP_KERNEL);
+        if (!client)
+                return -ENOMEM;
+        decoder = kmalloc(sizeof(*decoder), GFP_KERNEL);
+        if (!decoder) {
+                err = -ENOMEM;
+                goto out_free_client;
+        }
+
+        memset(client, 0, sizeof(struct i2c_client));
+        memset(decoder, 0, sizeof(struct saa7191));
+
+        client->addr = addr;
+        client->adapter = adap;
+        client->driver = &i2c_driver_saa7191;
+        client->flags = 0;
+        strcpy(client->name, "saa7191 client");
+        i2c_set_clientdata(client, decoder);
+
+        decoder->client = client;
+
+        err = i2c_attach_client(client);
+        if (err)
+                goto out_free_decoder;
+
+        decoder->input = SAA7191_INPUT_COMPOSITE;
+        decoder->norm = SAA7191_NORM_AUTO;
+
+        err = saa7191_write_block(client, sizeof(initseq),
+                                  (unsigned char *)initseq);
+        if (err) {
+                printk(KERN_ERR "SAA7191 initialization failed\n");
+                goto out_detach_client;
+        }
+
+        printk(KERN_INFO "SAA7191 initialized\n");
+
+        return 0;
+
+out_detach_client:
+        i2c_detach_client(client);
+out_free_decoder:
+        kfree(decoder);
+out_free_client:
+        kfree(client);
+        return err;
+}
+
+static int saa7191_probe(struct i2c_adapter *adap)
+{
+        /* Always connected to VINO */
+        if (adap->id == VINO_ADAPTER)
+                return saa7191_attach(adap, SAA7191_ADDR, 0);
+        /* Feel free to add probe here :-) */
+        return -ENODEV;
+}
+
+static int saa7191_detach(struct i2c_client *client)
+{
+        struct saa7191 *decoder = i2c_get_clientdata(client);
+
+        i2c_detach_client(client);
+        kfree(decoder);
+        kfree(client);
+        return 0;
+}
+
+static int saa7191_command(struct i2c_client *client, unsigned int cmd,
+                           void *arg)
+{
+        struct saa7191 *decoder = i2c_get_clientdata(client);
+
+        switch (cmd) {
+        case DECODER_GET_CAPABILITIES: {
+                struct video_decoder_capability *cap = arg;
+
+                cap->flags  = VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
+                              VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
+                cap->inputs = (client->adapter->id == VINO_ADAPTER) ? 2 : 1;
+                cap->outputs = 1;
+                break;
+        }
+        case DECODER_GET_STATUS: {
+                int *iarg = arg;
+                unsigned char status;
+                int res = 0;
+
+                if (saa7191_read_status(client, &status)) {
+                        return -EIO;
+                }
+                if ((status & SAA7191_STATUS_HLCK) == 0)
+                        res |= DECODER_STATUS_GOOD;
+                if (status & SAA7191_STATUS_CODE)
+                        res |= DECODER_STATUS_COLOR;
+                switch (decoder->norm) {
+                case SAA7191_NORM_NTSC:
+                        res |= DECODER_STATUS_NTSC;
+                        break;
+                case SAA7191_NORM_PAL:
+                        res |= DECODER_STATUS_PAL;
+                        break;
+                case SAA7191_NORM_SECAM:
+                        res |= DECODER_STATUS_SECAM;
+                        break;
+                case SAA7191_NORM_AUTO:
+                default:
+                        if (status & SAA7191_STATUS_FIDT)
+                                res |= DECODER_STATUS_NTSC;
+                        else
+                                res |= DECODER_STATUS_PAL;
+                        break;
+                }
+                *iarg = res;
+                break;
+        }
+        case DECODER_SET_NORM: {
+                int *iarg = arg;
+
+                switch (*iarg) {
+                case VIDEO_MODE_AUTO:
+                        return saa7191_set_norm(client, SAA7191_NORM_AUTO);
+                case VIDEO_MODE_PAL:
+                        return saa7191_set_norm(client, SAA7191_NORM_PAL);
+                case VIDEO_MODE_NTSC:
+                        return saa7191_set_norm(client, SAA7191_NORM_NTSC);
+                case VIDEO_MODE_SECAM:
+                        return saa7191_set_norm(client, SAA7191_NORM_SECAM);
+                default:
+                        return -EINVAL;
+                }
+                break;
+        }
+        case DECODER_SET_INPUT: {
+                int *iarg = arg;
+
+                switch (client->adapter->id) {
+                case VINO_ADAPTER:
+                        return saa7191_set_input(client, *iarg);
+                default:
+                        if (*iarg != 0)
+                                return -EINVAL;
+                }
+                break;
+        }
+        case DECODER_SET_OUTPUT: {
+                int *iarg = arg;
+
+                /* not much choice of outputs */
+                if (*iarg != 0)
+                        return -EINVAL;
+                break;
+        }
+        case DECODER_ENABLE_OUTPUT: {
+                /* Always enabled */
+                break;
+        }
+        case DECODER_SET_PICTURE: {
+                struct video_picture *pic = arg;
+                unsigned val;
+                int err;
+
+                val = (pic->hue >> 8) - 0x80;
+                err = saa7191_write_reg(client, SAA7191_REG_HUEC, val);
+                if (err)
+                        return -EIO;
+                break;
+        }
+        case DECODER_SAA7191_GET_STATUS: {
+                struct saa7191_status *status = arg;
+                unsigned char status_reg;
+
+                if (saa7191_read_status(client, &status_reg))
+                        return -EIO;
+                status->signal = ((status_reg & SAA7191_STATUS_HLCK) == 0)
+                        ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
+                status->ntsc = (status_reg & SAA7191_STATUS_FIDT)
+                        ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
+                status->color = (status_reg & SAA7191_STATUS_CODE)
+                        ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
+
+                status->input = decoder->input;
+                status->norm = decoder->norm;
+        }
+        case DECODER_SAA7191_SET_NORM: {
+                int *norm = arg;
+                return saa7191_set_norm(client, *norm);
+        }
+        case DECODER_SAA7191_GET_CONTROLS: {
+                struct saa7191_control *ctrl = arg;
+                return saa7191_get_controls(client, ctrl);
+        }
+        case DECODER_SAA7191_SET_CONTROLS: {
+                struct saa7191_control *ctrl = arg;
+                return saa7191_set_controls(client, ctrl);
+        }
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static struct i2c_driver i2c_driver_saa7191 = {
+        .owner          = THIS_MODULE,
+        .name           = "saa7191",
+        .id             = I2C_DRIVERID_SAA7191,
+        .flags          = I2C_DF_NOTIFY,
+        .attach_adapter = saa7191_probe,
+        .detach_client  = saa7191_detach,
+        .command        = saa7191_command
+};
+
+static int saa7191_init(void)
+{
+        return i2c_add_driver(&i2c_driver_saa7191);
+}
+
+static void saa7191_exit(void)
+{
+        i2c_del_driver(&i2c_driver_saa7191);
+}
+
+module_init(saa7191_init);
+module_exit(saa7191_exit);