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path: root/drivers/media/video/bt856.c
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Diffstat (limited to 'drivers/media/video/bt856.c')
-rw-r--r--drivers/media/video/bt856.c442
1 files changed, 442 insertions, 0 deletions
diff --git a/drivers/media/video/bt856.c b/drivers/media/video/bt856.c
new file mode 100644
index 0000000..72c7eb0
--- /dev/null
+++ b/drivers/media/video/bt856.c
@@ -0,0 +1,442 @@
+/*
+ * bt856 - BT856A Digital Video Encoder (Rockwell Part)
+ *
+ * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
+ * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
+ *
+ * Modifications for LML33/DC10plus unified driver
+ * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
+ *
+ * This code was modify/ported from the saa7111 driver written
+ * by Dave Perks.
+ *
+ * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
+ * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#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/pci.h>
+#include <linux/signal.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <linux/sched.h>
+#include <asm/segment.h>
+#include <linux/types.h>
+
+#include <linux/videodev.h>
+#include <asm/uaccess.h>
+
+MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
+MODULE_AUTHOR("Mike Bernson & Dave Perks");
+MODULE_LICENSE("GPL");
+
+#include <linux/i2c.h>
+#include <linux/i2c-dev.h>
+
+#define I2C_NAME(s) (s)->name
+
+#include <linux/video_encoder.h>
+
+static int debug = 0;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+#define dprintk(num, format, args...) \
+ do { \
+ if (debug >= num) \
+ printk(format, ##args); \
+ } while (0)
+
+/* ----------------------------------------------------------------------- */
+
+#define REG_OFFSET 0xCE
+
+struct bt856 {
+ unsigned char reg[32];
+
+ int norm;
+ int enable;
+ int bright;
+ int contrast;
+ int hue;
+ int sat;
+};
+
+#define I2C_BT856 0x88
+
+/* ----------------------------------------------------------------------- */
+
+static inline int
+bt856_write (struct i2c_client *client,
+ u8 reg,
+ u8 value)
+{
+ struct bt856 *encoder = i2c_get_clientdata(client);
+
+ encoder->reg[reg - REG_OFFSET] = value;
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline int
+bt856_setbit (struct i2c_client *client,
+ u8 reg,
+ u8 bit,
+ u8 value)
+{
+ struct bt856 *encoder = i2c_get_clientdata(client);
+
+ return bt856_write(client, reg,
+ (encoder->
+ reg[reg - REG_OFFSET] & ~(1 << bit)) |
+ (value ? (1 << bit) : 0));
+}
+
+static void
+bt856_dump (struct i2c_client *client)
+{
+ int i;
+ struct bt856 *encoder = i2c_get_clientdata(client);
+
+ printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
+ for (i = 0xd6; i <= 0xde; i += 2)
+ printk(" %02x", encoder->reg[i - REG_OFFSET]);
+ printk("\n");
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int
+bt856_command (struct i2c_client *client,
+ unsigned int cmd,
+ void *arg)
+{
+ struct bt856 *encoder = i2c_get_clientdata(client);
+
+ switch (cmd) {
+
+ case 0:
+ /* This is just for testing!!! */
+ dprintk(1, KERN_INFO "bt856: init\n");
+ bt856_write(client, 0xdc, 0x18);
+ bt856_write(client, 0xda, 0);
+ bt856_write(client, 0xde, 0);
+
+ bt856_setbit(client, 0xdc, 3, 1);
+ //bt856_setbit(client, 0xdc, 6, 0);
+ bt856_setbit(client, 0xdc, 4, 1);
+
+ switch (encoder->norm) {
+
+ case VIDEO_MODE_NTSC:
+ bt856_setbit(client, 0xdc, 2, 0);
+ break;
+
+ case VIDEO_MODE_PAL:
+ bt856_setbit(client, 0xdc, 2, 1);
+ break;
+ }
+
+ bt856_setbit(client, 0xdc, 1, 1);
+ bt856_setbit(client, 0xde, 4, 0);
+ bt856_setbit(client, 0xde, 3, 1);
+ if (debug != 0)
+ bt856_dump(client);
+ break;
+
+ case ENCODER_GET_CAPABILITIES:
+ {
+ struct video_encoder_capability *cap = arg;
+
+ dprintk(1, KERN_INFO "%s: get capabilities\n",
+ I2C_NAME(client));
+
+ cap->flags = VIDEO_ENCODER_PAL |
+ VIDEO_ENCODER_NTSC |
+ VIDEO_ENCODER_CCIR;
+ cap->inputs = 2;
+ cap->outputs = 1;
+ }
+ break;
+
+ case ENCODER_SET_NORM:
+ {
+ int *iarg = arg;
+
+ dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
+ *iarg);
+
+ switch (*iarg) {
+
+ case VIDEO_MODE_NTSC:
+ bt856_setbit(client, 0xdc, 2, 0);
+ break;
+
+ case VIDEO_MODE_PAL:
+ bt856_setbit(client, 0xdc, 2, 1);
+ bt856_setbit(client, 0xda, 0, 0);
+ //bt856_setbit(client, 0xda, 0, 1);
+ break;
+
+ default:
+ return -EINVAL;
+
+ }
+ encoder->norm = *iarg;
+ if (debug != 0)
+ bt856_dump(client);
+ }
+ break;
+
+ case ENCODER_SET_INPUT:
+ {
+ int *iarg = arg;
+
+ dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
+ *iarg);
+
+ /* We only have video bus.
+ * iarg = 0: input is from bt819
+ * iarg = 1: input is from ZR36060 */
+
+ switch (*iarg) {
+
+ case 0:
+ bt856_setbit(client, 0xde, 4, 0);
+ bt856_setbit(client, 0xde, 3, 1);
+ bt856_setbit(client, 0xdc, 3, 1);
+ bt856_setbit(client, 0xdc, 6, 0);
+ break;
+ case 1:
+ bt856_setbit(client, 0xde, 4, 0);
+ bt856_setbit(client, 0xde, 3, 1);
+ bt856_setbit(client, 0xdc, 3, 1);
+ bt856_setbit(client, 0xdc, 6, 1);
+ break;
+ case 2: // Color bar
+ bt856_setbit(client, 0xdc, 3, 0);
+ bt856_setbit(client, 0xde, 4, 1);
+ break;
+ default:
+ return -EINVAL;
+
+ }
+
+ if (debug != 0)
+ bt856_dump(client);
+ }
+ break;
+
+ case ENCODER_SET_OUTPUT:
+ {
+ int *iarg = arg;
+
+ dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
+ *iarg);
+
+ /* not much choice of outputs */
+ if (*iarg != 0) {
+ return -EINVAL;
+ }
+ }
+ break;
+
+ case ENCODER_ENABLE_OUTPUT:
+ {
+ int *iarg = arg;
+
+ encoder->enable = !!*iarg;
+
+ dprintk(1, KERN_INFO "%s: enable output %d\n",
+ I2C_NAME(client), encoder->enable);
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };
+static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
+
+static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
+
+static struct i2c_client_address_data addr_data = {
+ .normal_i2c = normal_i2c,
+ .normal_i2c_range = normal_i2c_range,
+ .probe = probe,
+ .probe_range = probe_range,
+ .ignore = ignore,
+ .ignore_range = ignore_range,
+ .force = force
+};
+
+static struct i2c_driver i2c_driver_bt856;
+
+static int
+bt856_detect_client (struct i2c_adapter *adapter,
+ int address,
+ int kind)
+{
+ int i;
+ struct i2c_client *client;
+ struct bt856 *encoder;
+
+ dprintk(1,
+ KERN_INFO
+ "bt856.c: detecting bt856 client on address 0x%x\n",
+ address << 1);
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return 0;
+
+ client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (client == 0)
+ return -ENOMEM;
+ memset(client, 0, sizeof(struct i2c_client));
+ client->addr = address;
+ client->adapter = adapter;
+ client->driver = &i2c_driver_bt856;
+ client->flags = I2C_CLIENT_ALLOW_USE;
+ strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
+
+ encoder = kmalloc(sizeof(struct bt856), GFP_KERNEL);
+ if (encoder == NULL) {
+ kfree(client);
+ return -ENOMEM;
+ }
+ memset(encoder, 0, sizeof(struct bt856));
+ encoder->norm = VIDEO_MODE_NTSC;
+ encoder->enable = 1;
+ i2c_set_clientdata(client, encoder);
+
+ i = i2c_attach_client(client);
+ if (i) {
+ kfree(client);
+ kfree(encoder);
+ return i;
+ }
+
+ bt856_write(client, 0xdc, 0x18);
+ bt856_write(client, 0xda, 0);
+ bt856_write(client, 0xde, 0);
+
+ bt856_setbit(client, 0xdc, 3, 1);
+ //bt856_setbit(client, 0xdc, 6, 0);
+ bt856_setbit(client, 0xdc, 4, 1);
+
+ switch (encoder->norm) {
+
+ case VIDEO_MODE_NTSC:
+ bt856_setbit(client, 0xdc, 2, 0);
+ break;
+
+ case VIDEO_MODE_PAL:
+ bt856_setbit(client, 0xdc, 2, 1);
+ break;
+ }
+
+ bt856_setbit(client, 0xdc, 1, 1);
+ bt856_setbit(client, 0xde, 4, 0);
+ bt856_setbit(client, 0xde, 3, 1);
+
+ if (debug != 0)
+ bt856_dump(client);
+
+ dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
+ client->addr << 1);
+
+ return 0;
+}
+
+static int
+bt856_attach_adapter (struct i2c_adapter *adapter)
+{
+ dprintk(1,
+ KERN_INFO
+ "bt856.c: starting probe for adapter %s (0x%x)\n",
+ I2C_NAME(adapter), adapter->id);
+ return i2c_probe(adapter, &addr_data, &bt856_detect_client);
+}
+
+static int
+bt856_detach_client (struct i2c_client *client)
+{
+ struct bt856 *encoder = i2c_get_clientdata(client);
+ int err;
+
+ err = i2c_detach_client(client);
+ if (err) {
+ return err;
+ }
+
+ kfree(encoder);
+ kfree(client);
+
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static struct i2c_driver i2c_driver_bt856 = {
+ .owner = THIS_MODULE,
+ .name = "bt856",
+
+ .id = I2C_DRIVERID_BT856,
+ .flags = I2C_DF_NOTIFY,
+
+ .attach_adapter = bt856_attach_adapter,
+ .detach_client = bt856_detach_client,
+ .command = bt856_command,
+};
+
+static int __init
+bt856_init (void)
+{
+ return i2c_add_driver(&i2c_driver_bt856);
+}
+
+static void __exit
+bt856_exit (void)
+{
+ i2c_del_driver(&i2c_driver_bt856);
+}
+
+module_init(bt856_init);
+module_exit(bt856_exit);
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