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 <linux/poll.h>
  47 #include <asm/io.h>
  48
  49 #include "videocodec.h"
  50 #include "zoran.h"
  51 #include "zoran_procfs.h"
  52
  53 extern int *zr_debug;
  54
  55 #define dprintk(num, format, args...) \
  56         do { \
  57                 if (*zr_debug >= num) \
  58                         printk(format, ##args); \
  59         } while (0)
  60
  61 #ifdef CONFIG_PROC_FS
  62 struct procfs_params_zr36067 {
  63         char *name;
  64         short reg;
  65         u32 mask;
  66         short bit;
  67 };
  68
  69 static const struct procfs_params_zr36067 zr67[] = {
  70         {"HSPol", 0x000, 1, 30},
  71         {"HStart", 0x000, 0x3ff, 10},
  72         {"HEnd", 0x000, 0x3ff, 0},
  73
  74         {"VSPol", 0x004, 1, 30},
  75         {"VStart", 0x004, 0x3ff, 10},
  76         {"VEnd", 0x004, 0x3ff, 0},
  77
  78         {"ExtFl", 0x008, 1, 26},
  79         {"TopField", 0x008, 1, 25},
  80         {"VCLKPol", 0x008, 1, 24},
  81         {"DupFld", 0x008, 1, 20},
  82         {"LittleEndian", 0x008, 1, 0},
  83
  84         {"HsyncStart", 0x10c, 0xffff, 16},
  85         {"LineTot", 0x10c, 0xffff, 0},
  86
  87         {"NAX", 0x110, 0xffff, 16},
  88         {"PAX", 0x110, 0xffff, 0},
  89
  90         {"NAY", 0x114, 0xffff, 16},
  91         {"PAY", 0x114, 0xffff, 0},
  92
  93         /* {"",,,}, */
  94
  95         {NULL, 0, 0, 0},
  96 };
  97
  98 static void
  99 setparam (struct zoran *zr,
 100           char         *name,
 101           char         *sval)
 102 {
 103         int i = 0, reg0, reg, val;
 104
 105         while (zr67[i].name != NULL) {
 106                 if (!strncmp(name, zr67[i].name, strlen(zr67[i].name))) {
 107                         reg = reg0 = btread(zr67[i].reg);
 108                         reg &= ~(zr67[i].mask << zr67[i].bit);
 109                         if (!isdigit(sval[0]))
 110                                 break;
 111                         val = simple_strtoul(sval, NULL, 0);
 112                         if ((val & ~zr67[i].mask))
 113                                 break;
 114                         reg |= (val & zr67[i].mask) << zr67[i].bit;
 115                         dprintk(4,
 116                                 KERN_INFO
 117                                 "%s: setparam: setting ZR36067 register 0x%03x: 0x%08x=>0x%08x %s=%d\n",
 118                                 ZR_DEVNAME(zr), zr67[i].reg, reg0, reg,
 119                                 zr67[i].name, val);
 120                         btwrite(reg, zr67[i].reg);
 121                         break;
 122                 }
 123                 i++;
 124         }
 125 }
 126
 127 static int zoran_show(struct seq_file *p, void *v)
 128 {
 129         struct zoran *zr = p->private;
 130         int i;
 131
 132         seq_printf(p, "ZR36067 registers:\n");
 133         for (i = 0; i < 0x130; i += 16)
 134                 seq_printf(p, "%03X %08X  %08X  %08X  %08X \n", i,
 135                            btread(i), btread(i+4), btread(i+8), btread(i+12));
 136         return 0;
 137 }
 138
 139 static int zoran_open(struct inode *inode, struct file *file)
 140 {
 141         struct zoran *data = PDE(inode)->data;
 142         return single_open(file, zoran_show, data);
 143 }
 144
 145 static ssize_t zoran_write(struct file *file, const char __user *buffer,
 146                         size_t count, loff_t *ppos)
 147 {
 148         struct zoran *zr = PDE(file->f_dentry->d_inode)->data;
 149         char *string, *sp;
 150         char *line, *ldelim, *varname, *svar, *tdelim;
 151
 152         if (count > 32768)      /* Stupidity filter */
 153                 return -EINVAL;
 154
 155         string = sp = vmalloc(count + 1);
 156         if (!string) {
 157                 dprintk(1,
 158                         KERN_ERR
 159                         "%s: write_proc: can not allocate memory\n",
 160                         ZR_DEVNAME(zr));
 161                 return -ENOMEM;
 162         }
 163         if (copy_from_user(string, buffer, count)) {
 164                 vfree (string);
 165                 return -EFAULT;
 166         }
 167         string[count] = 0;
 168         dprintk(4, KERN_INFO "%s: write_proc: name=%s count=%zu zr=%p\n",
 169                 ZR_DEVNAME(zr), file->f_dentry->d_name.name, count, zr);
 170         ldelim = " \t\n";
 171         tdelim = "=";
 172         line = strpbrk(sp, ldelim);
 173         while (line) {
 174                 *line = 0;
 175                 svar = strpbrk(sp, tdelim);
 176                 if (svar) {
 177                         *svar = 0;
 178                         varname = sp;
 179                         svar++;
 180                         setparam(zr, varname, svar);
 181                 }
 182                 sp = line + 1;
 183                 line = strpbrk(sp, ldelim);
 184         }
 185         vfree(string);
 186
 187         return count;
 188 }
 189
 190 static struct file_operations zoran_operations = {
 191         .open           = zoran_open,
 192         .read           = seq_read,
 193         .write          = zoran_write,
 194         .llseek         = seq_lseek,
 195         .release        = single_release,
 196 };
 197 #endif
 198
 199 int
 200 zoran_proc_init (struct zoran *zr)
 201 {
 202 #ifdef CONFIG_PROC_FS
 203         char name[8];
 204
 205         snprintf(name, 7, "zoran%d", zr->id);
 206         if ((zr->zoran_proc = create_proc_entry(name, 0, NULL))) {
 207                 zr->zoran_proc->data = zr;
 208                 zr->zoran_proc->owner = THIS_MODULE;
 209                 zr->zoran_proc->proc_fops = &zoran_operations;
 210                 dprintk(2,
 211                         KERN_INFO
 212                         "%s: procfs entry /proc/%s allocated. data=%p\n",
 213                         ZR_DEVNAME(zr), name, zr->zoran_proc->data);
 214         } else {
 215                 dprintk(1, KERN_ERR "%s: Unable to initialise /proc/%s\n",
 216                         ZR_DEVNAME(zr), name);
 217                 return 1;
 218         }
 219 #endif
 220         return 0;
 221 }
 222
 223 void
 224 zoran_proc_cleanup (struct zoran *zr)
 225 {
 226 #ifdef CONFIG_PROC_FS
 227         char name[8];
 228
 229         snprintf(name, 7, "zoran%d", zr->id);
 230         if (zr->zoran_proc)
 231                 remove_proc_entry(name, NULL);
 232         zr->zoran_proc = NULL;
 233 #endif
 234 }