diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/media/video/bt856.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/media/video/bt856.c')
-rw-r--r-- | drivers/media/video/bt856.c | 442 |
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 000000000000..72c7eb0f8c24 --- /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); |