mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 09:06:52 +07:00
0d0d871b3f
The Coverity checker spotted the following two array overflows. Registers 0xcc and 0xdc were cached on reg[] array, with only 128 elements, instead of 256. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
378 lines
8.1 KiB
C
378 lines
8.1 KiB
C
/*
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bt866 - BT866 Digital Video Encoder (Rockwell Part)
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Copyright (C) 1999 Mike Bernson <mike@mlb.org>
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Copyright (C) 1998 Dave Perks <dperks@ibm.net>
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Modifications for LML33/DC10plus unified driver
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Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
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This code was modify/ported from the saa7111 driver written
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by Dave Perks.
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This code was adapted for the bt866 by Christer Weinigel and ported
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to 2.6 by Martin Samuelsson.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/pci.h>
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#include <linux/signal.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/i2c.h>
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#include <linux/videodev.h>
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#include <asm/uaccess.h>
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#include <linux/video_encoder.h>
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MODULE_LICENSE("GPL");
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#define BT866_DEVNAME "bt866"
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#define I2C_BT866 0x88
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MODULE_LICENSE("GPL");
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#define DEBUG(x) /* Debug driver */
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/* ----------------------------------------------------------------------- */
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struct bt866 {
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struct i2c_client *i2c;
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int addr;
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unsigned char reg[256];
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int norm;
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int enable;
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int bright;
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int contrast;
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int hue;
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int sat;
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};
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static int bt866_write(struct bt866 *dev,
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unsigned char subaddr, unsigned char data);
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static int bt866_do_command(struct bt866 *encoder,
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unsigned int cmd, void *arg)
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{
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switch (cmd) {
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case ENCODER_GET_CAPABILITIES:
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{
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struct video_encoder_capability *cap = arg;
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DEBUG(printk
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(KERN_INFO "%s: get capabilities\n",
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encoder->i2c->name));
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cap->flags
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= VIDEO_ENCODER_PAL
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| VIDEO_ENCODER_NTSC
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| VIDEO_ENCODER_CCIR;
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cap->inputs = 2;
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cap->outputs = 1;
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}
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break;
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case ENCODER_SET_NORM:
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{
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int *iarg = arg;
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DEBUG(printk(KERN_INFO "%s: set norm %d\n",
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encoder->i2c->name, *iarg));
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switch (*iarg) {
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case VIDEO_MODE_NTSC:
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break;
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case VIDEO_MODE_PAL:
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break;
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default:
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return -EINVAL;
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}
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encoder->norm = *iarg;
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}
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break;
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case ENCODER_SET_INPUT:
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{
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int *iarg = arg;
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static const __u8 init[] = {
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0xc8, 0xcc, /* CRSCALE */
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0xca, 0x91, /* CBSCALE */
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0xcc, 0x24, /* YC16 | OSDNUM */
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0xda, 0x00, /* */
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0xdc, 0x24, /* SETMODE | PAL */
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0xde, 0x02, /* EACTIVE */
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/* overlay colors */
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0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
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0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
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0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
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0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
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0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
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0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
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0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
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0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */
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0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
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0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
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0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
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0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
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0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
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0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
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0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
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0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
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};
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int i;
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u8 val;
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for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
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bt866_write(encoder, init[i], init[i+1]);
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val = encoder->reg[0xdc];
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if (*iarg == 0)
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val |= 0x40; /* CBSWAP */
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else
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val &= ~0x40; /* !CBSWAP */
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bt866_write(encoder, 0xdc, val);
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val = encoder->reg[0xcc];
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if (*iarg == 2)
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val |= 0x01; /* OSDBAR */
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else
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val &= ~0x01; /* !OSDBAR */
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bt866_write(encoder, 0xcc, val);
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DEBUG(printk(KERN_INFO "%s: set input %d\n",
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encoder->i2c->name, *iarg));
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switch (*iarg) {
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case 0:
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break;
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case 1:
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break;
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default:
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return -EINVAL;
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}
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}
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break;
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case ENCODER_SET_OUTPUT:
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{
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int *iarg = arg;
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DEBUG(printk(KERN_INFO "%s: set output %d\n",
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encoder->i2c->name, *iarg));
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/* not much choice of outputs */
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if (*iarg != 0)
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return -EINVAL;
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}
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break;
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case ENCODER_ENABLE_OUTPUT:
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{
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int *iarg = arg;
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encoder->enable = !!*iarg;
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DEBUG(printk
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(KERN_INFO "%s: enable output %d\n",
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encoder->i2c->name, encoder->enable));
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}
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break;
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case 4711:
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{
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int *iarg = arg;
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__u8 val;
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printk("bt866: square = %d\n", *iarg);
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val = encoder->reg[0xdc];
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if (*iarg)
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val |= 1; /* SQUARE */
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else
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val &= ~1; /* !SQUARE */
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bt866_write(encoder, 0xdc, val);
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break;
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}
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int bt866_write(struct bt866 *encoder,
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unsigned char subaddr, unsigned char data)
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{
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unsigned char buffer[2];
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int err;
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buffer[0] = subaddr;
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buffer[1] = data;
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encoder->reg[subaddr] = data;
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DEBUG(printk
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("%s: write 0x%02X = 0x%02X\n",
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encoder->i2c->name, subaddr, data));
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for (err = 0; err < 3;) {
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if (i2c_master_send(encoder->i2c, buffer, 2) == 2)
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break;
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err++;
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printk(KERN_WARNING "%s: I/O error #%d "
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"(write 0x%02x/0x%02x)\n",
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encoder->i2c->name, err, encoder->addr, subaddr);
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schedule_timeout_interruptible(HZ/10);
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}
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if (err == 3) {
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printk(KERN_WARNING "%s: giving up\n",
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encoder->i2c->name);
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return -1;
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}
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return 0;
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}
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static int bt866_attach(struct i2c_adapter *adapter);
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static int bt866_detach(struct i2c_client *client);
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static int bt866_command(struct i2c_client *client,
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unsigned int cmd, void *arg);
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/* Addresses to scan */
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static unsigned short normal_i2c[] = {I2C_BT866>>1, I2C_CLIENT_END};
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static unsigned short probe[2] = {I2C_CLIENT_END, I2C_CLIENT_END};
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static unsigned short ignore[2] = {I2C_CLIENT_END, I2C_CLIENT_END};
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static struct i2c_client_address_data addr_data = {
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normal_i2c,
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probe,
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ignore,
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};
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static struct i2c_driver i2c_driver_bt866 = {
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.driver.name = BT866_DEVNAME,
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.id = I2C_DRIVERID_BT866,
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.attach_adapter = bt866_attach,
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.detach_client = bt866_detach,
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.command = bt866_command
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};
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static struct i2c_client bt866_client_tmpl =
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{
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.name = "(nil)",
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.addr = 0,
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.adapter = NULL,
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.driver = &i2c_driver_bt866,
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.usage_count = 0
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};
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static int bt866_found_proc(struct i2c_adapter *adapter,
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int addr, int kind)
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{
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struct bt866 *encoder;
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struct i2c_client *client;
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client = kzalloc(sizeof(*client), GFP_KERNEL);
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if (client == NULL)
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return -ENOMEM;
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memcpy(client, &bt866_client_tmpl, sizeof(*client));
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encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
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if (encoder == NULL) {
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kfree(client);
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return -ENOMEM;
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}
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i2c_set_clientdata(client, encoder);
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client->adapter = adapter;
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client->addr = addr;
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sprintf(client->name, "%s-%02x", BT866_DEVNAME, adapter->id);
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encoder->i2c = client;
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encoder->addr = addr;
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//encoder->encoder_type = ENCODER_TYPE_UNKNOWN;
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/* initialize */
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i2c_attach_client(client);
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return 0;
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}
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static int bt866_attach(struct i2c_adapter *adapter)
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{
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if (adapter->id == I2C_HW_B_ZR36067)
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return i2c_probe(adapter, &addr_data, bt866_found_proc);
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return 0;
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}
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static int bt866_detach(struct i2c_client *client)
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{
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struct bt866 *encoder = i2c_get_clientdata(client);
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i2c_detach_client(client);
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kfree(encoder);
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kfree(client);
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return 0;
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}
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static int bt866_command(struct i2c_client *client,
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unsigned int cmd, void *arg)
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{
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struct bt866 *encoder = i2c_get_clientdata(client);
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return bt866_do_command(encoder, cmd, arg);
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}
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static int __devinit bt866_init(void)
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{
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i2c_add_driver(&i2c_driver_bt866);
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return 0;
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}
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static void __devexit bt866_exit(void)
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{
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i2c_del_driver(&i2c_driver_bt866);
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}
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module_init(bt866_init);
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module_exit(bt866_exit);
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