drivers/media/video/zoran_procfs.c

   1 /*
   2  * Zoran zr36057/zr36067 PCI controller driver, for the
   3  * Pinnacle/Miro DC10/DC10+/DC30/DC30+, Iomega Buz, Linux
   4  * Media Labs LML33/LML33R10.
   5  *
   6  * This part handles the procFS entries (/proc/ZORAN[%d])
   7  *
   8  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   9  *
  10  * Currently maintained by:
  11  *   Ronald Bultje    <rbultje@ronald.bitfreak.net>
  12  *   Laurent Pinchart <laurent.pinchart@skynet.be>
  13  *   Mailinglist      <mjpeg-users@lists.sf.net>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29
  30 #include <linux/config.h>
  31 #include <linux/types.h>
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/vmalloc.h>
  35
  36 #include <linux/proc_fs.h>
  37 #include <linux/pci.h>
  38 #include <linux/i2c.h>
  39 #include <linux/i2c-algo-bit.h>
  40 #include <linux/videodev.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/sem.h>
  43 #include <linux/seq_file.h>
  44
  45 #include <linux/ctype.h>
  46 #include <asm/io.h>
  47
  48 #include "videocodec.h"
  49 #include "zoran.h"
  50 #include "zoran_procfs.h"
  51
  52 extern int *zr_debug;
  53
  54 #define dprintk(num, format, args...) \
  55         do { \
  56                 if (*zr_debug >= num) \
  57                         printk(format, ##args); \
  58         } while (0)
  59
  60 #ifdef CONFIG_PROC_FS
  61 struct procfs_params_zr36067 {
  62         char *name;
  63         short reg;
  64         u32 mask;
  65         short bit;
  66 };
  67
  68 static const struct procfs_params_zr36067 zr67[] = {
  69         {"HSPol", 0x000, 1, 30},
  70         {"HStart", 0x000, 0x3ff, 10},
  71         {"HEnd", 0x000, 0x3ff, 0},
  72
  73         {"VSPol", 0x004, 1, 30},
  74         {"VStart", 0x004, 0x3ff, 10},
  75         {"VEnd", 0x004, 0x3ff, 0},
  76
  77         {"ExtFl", 0x008, 1, 26},
  78         {"TopField", 0x008, 1, 25},
  79         {"VCLKPol", 0x008, 1, 24},
  80         {"DupFld", 0x008, 1, 20},
  81         {"LittleEndian", 0x008, 1, 0},
  82
  83         {"HsyncStart", 0x10c, 0xffff, 16},
  84         {"LineTot", 0x10c, 0xffff, 0},
  85
  86         {"NAX", 0x110, 0xffff, 16},
  87         {"PAX", 0x110, 0xffff, 0},
  88
  89         {"NAY", 0x114, 0xffff, 16},
  90         {"PAY", 0x114, 0xffff, 0},
  91
  92         /* {"",,,}, */
  93
  94         {NULL, 0, 0, 0},
  95 };
  96
  97 static void
  98 setparam (struct zoran *zr,
  99           char         *name,
 100           char         *sval)
 101 {
 102         int i = 0, reg0, reg, val;
 103
 104         while (zr67[i].name != NULL) {
 105                 if (!strncmp(name, zr67[i].name, strlen(zr67[i].name))) {
 106                         reg = reg0 = btread(zr67[i].reg);
 107                         reg &= ~(zr67[i].mask << zr67[i].bit);
 108                         if (!isdigit(sval[0]))
 109                                 break;
 110                         val = simple_strtoul(sval, NULL, 0);
 111                         if ((val & ~zr67[i].mask))
 112                                 break;
 113                         reg |= (val & zr67[i].mask) << zr67[i].bit;
 114                         dprintk(4,
 115                                 KERN_INFO
 116                                 "%s: setparam: setting ZR36067 register 0x%03x: 0x%08x=>0x%08x %s=%d\n",
 117                                 ZR_DEVNAME(zr), zr67[i].reg, reg0, reg,
 118                                 zr67[i].name, val);
 119                         btwrite(reg, zr67[i].reg);
 120                         break;
 121                 }
 122                 i++;
 123         }
 124 }
 125
 126 static int zoran_show(struct seq_file *p, void *v)
 127 {
 128         struct zoran *zr = p->private;
 129         int i;
 130
 131         seq_printf(p, "ZR36067 registers:\n");
 132         for (i = 0; i < 0x130; i += 16)
 133                 seq_printf(p, "%03X %08X  %08X  %08X  %08X \n", i,
 134                            btread(i), btread(i+4), btread(i+8), btread(i+12));
 135         return 0;
 136 }
 137
 138 static int zoran_open(struct inode *inode, struct file *file)
 139 {
 140         struct zoran *data = PDE(inode)->data;
 141         return single_open(file, zoran_show, data);
 142 }
 143
 144 static ssize_t zoran_write(struct file *file, const char __user *buffer,
 145                         size_t count, loff_t *ppos)
 146 {
 147         struct zoran *zr = PDE(file->f_dentry->d_inode)->data;
 148         char *string, *sp;
 149         char *line, *ldelim, *varname, *svar, *tdelim;
 150
 151         if (count > 32768)      /* Stupidity filter */
 152                 return -EINVAL;
 153
 154         string = sp = vmalloc(count + 1);
 155         if (!string) {
 156                 dprintk(1,
 157                         KERN_ERR
 158                         "%s: write_proc: can not allocate memory\n",
 159                         ZR_DEVNAME(zr));
 160                 return -ENOMEM;
 161         }
 162         if (copy_from_user(string, buffer, count)) {
 163                 vfree (string);
 164                 return -EFAULT;
 165         }
 166         string[count] = 0;
 167         dprintk(4, KERN_INFO "%s: write_proc: name=%s count=%zu zr=%p\n",
 168                 ZR_DEVNAME(zr), file->f_dentry->d_name.name, count, zr);
 169         ldelim = " \t\n";
 170         tdelim = "=";
 171         line = strpbrk(sp, ldelim);
 172         while (line) {
 173                 *line = 0;
 174                 svar = strpbrk(sp, tdelim);
 175                 if (svar) {
 176                         *svar = 0;
 177                         varname = sp;
 178                         svar++;
 179                         setparam(zr, varname, svar);
 180                 }
 181                 sp = line + 1;
 182                 line = strpbrk(sp, ldelim);
 183         }
 184         vfree(string);
 185
 186         return count;
 187 }
 188
 189 static struct file_operations zoran_operations = {
 190         .open           = zoran_open,
 191         .read           = seq_read,
 192         .write          = zoran_write,
 193         .llseek         = seq_lseek,
 194         .release        = single_release,
 195 };
 196 #endif
 197
 198 int
 199 zoran_proc_init (struct zoran *zr)
 200 {
 201 #ifdef CONFIG_PROC_FS
 202         char name[8];
 203
 204         snprintf(name, 7, "zoran%d", zr->id);
 205         if ((zr->zoran_proc = create_proc_entry(name, 0, NULL))) {
 206                 zr->zoran_proc->data = zr;
 207                 zr->zoran_proc->owner = THIS_MODULE;
 208                 zr->zoran_proc->proc_fops = &zoran_operations;
 209                 dprintk(2,
 210                         KERN_INFO
 211                         "%s: procfs entry /proc/%s allocated. data=%p\n",
 212                         ZR_DEVNAME(zr), name, zr->zoran_proc->data);
 213         } else {
 214                 dprintk(1, KERN_ERR "%s: Unable to initialise /proc/%s\n",
 215                         ZR_DEVNAME(zr), name);
 216                 return 1;
 217         }
 218 #endif
 219         return 0;
 220 }
 221
 222 void
 223 zoran_proc_cleanup (struct zoran *zr)
 224 {
 225 #ifdef CONFIG_PROC_FS
 226         char name[8];
 227
 228         snprintf(name, 7, "zoran%d", zr->id);
 229         if (zr->zoran_proc)
 230                 remove_proc_entry(name, NULL);
 231         zr->zoran_proc = NULL;
 232 #endif
 233 }