drivers/media/pci/zoran/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
  26 #include <linux/types.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/vmalloc.h>
  30
  31 #include <linux/proc_fs.h>
  32 #include <linux/pci.h>
  33 #include <linux/i2c.h>
  34 #include <linux/i2c-algo-bit.h>
  35 #include <linux/videodev2.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/sem.h>
  38 #include <linux/seq_file.h>
  39
  40 #include <linux/ctype.h>
  41 #include <linux/poll.h>
  42 #include <asm/io.h>
  43
  44 #include "videocodec.h"
  45 #include "zoran.h"
  46 #include "zoran_procfs.h"
  47 #include "zoran_card.h"
  48
  49 #ifdef CONFIG_PROC_FS
  50 struct procfs_params_zr36067 {
  51         char *name;
  52         short reg;
  53         u32 mask;
  54         short bit;
  55 };
  56
  57 static const struct procfs_params_zr36067 zr67[] = {
  58         {"HSPol", 0x000, 1, 30},
  59         {"HStart", 0x000, 0x3ff, 10},
  60         {"HEnd", 0x000, 0x3ff, 0},
  61
  62         {"VSPol", 0x004, 1, 30},
  63         {"VStart", 0x004, 0x3ff, 10},
  64         {"VEnd", 0x004, 0x3ff, 0},
  65
  66         {"ExtFl", 0x008, 1, 26},
  67         {"TopField", 0x008, 1, 25},
  68         {"VCLKPol", 0x008, 1, 24},
  69         {"DupFld", 0x008, 1, 20},
  70         {"LittleEndian", 0x008, 1, 0},
  71
  72         {"HsyncStart", 0x10c, 0xffff, 16},
  73         {"LineTot", 0x10c, 0xffff, 0},
  74
  75         {"NAX", 0x110, 0xffff, 16},
  76         {"PAX", 0x110, 0xffff, 0},
  77
  78         {"NAY", 0x114, 0xffff, 16},
  79         {"PAY", 0x114, 0xffff, 0},
  80
  81         /* {"",,,}, */
  82
  83         {NULL, 0, 0, 0},
  84 };
  85
  86 static void
  87 setparam (struct zoran *zr,
  88           char         *name,
  89           char         *sval)
  90 {
  91         int i = 0, reg0, reg, val;
  92
  93         while (zr67[i].name != NULL) {
  94                 if (!strncmp(name, zr67[i].name, strlen(zr67[i].name))) {
  95                         reg = reg0 = btread(zr67[i].reg);
  96                         reg &= ~(zr67[i].mask << zr67[i].bit);
  97                         if (!isdigit(sval[0]))
  98                                 break;
  99                         val = simple_strtoul(sval, NULL, 0);
 100                         if ((val & ~zr67[i].mask))
 101                                 break;
 102                         reg |= (val & zr67[i].mask) << zr67[i].bit;
 103                         dprintk(4,
 104                                 KERN_INFO
 105                                 "%s: setparam: setting ZR36067 register 0x%03x: 0x%08x=>0x%08x %s=%d\n",
 106                                 ZR_DEVNAME(zr), zr67[i].reg, reg0, reg,
 107                                 zr67[i].name, val);
 108                         btwrite(reg, zr67[i].reg);
 109                         break;
 110                 }
 111                 i++;
 112         }
 113 }
 114
 115 static int zoran_show(struct seq_file *p, void *v)
 116 {
 117         struct zoran *zr = p->private;
 118         int i;
 119
 120         seq_printf(p, "ZR36067 registers:\n");
 121         for (i = 0; i < 0x130; i += 16)
 122                 seq_printf(p, "%03X %08X  %08X  %08X  %08X \n", i,
 123                            btread(i), btread(i+4), btread(i+8), btread(i+12));
 124         return 0;
 125 }
 126
 127 static int zoran_open(struct inode *inode, struct file *file)
 128 {
 129         struct zoran *data = PDE_DATA(inode);
 130         return single_open(file, zoran_show, data);
 131 }
 132
 133 static ssize_t zoran_write(struct file *file, const char __user *buffer,
 134                         size_t count, loff_t *ppos)
 135 {
 136         struct zoran *zr = PDE_DATA(file_inode(file));
 137         char *string, *sp;
 138         char *line, *ldelim, *varname, *svar, *tdelim;
 139
 140         if (count > 32768)      /* Stupidity filter */
 141                 return -EINVAL;
 142
 143         string = sp = vmalloc(count + 1);
 144         if (!string) {
 145                 dprintk(1,
 146                         KERN_ERR
 147                         "%s: write_proc: can not allocate memory\n",
 148                         ZR_DEVNAME(zr));
 149                 return -ENOMEM;
 150         }
 151         if (copy_from_user(string, buffer, count)) {
 152                 vfree (string);
 153                 return -EFAULT;
 154         }
 155         string[count] = 0;
 156         dprintk(4, KERN_INFO "%s: write_proc: name=%pD count=%zu zr=%p\n",
 157                 ZR_DEVNAME(zr), file, count, zr);
 158         ldelim = " \t\n";
 159         tdelim = "=";
 160         line = strpbrk(sp, ldelim);
 161         while (line) {
 162                 *line = 0;
 163                 svar = strpbrk(sp, tdelim);
 164                 if (svar) {
 165                         *svar = 0;
 166                         varname = sp;
 167                         svar++;
 168                         setparam(zr, varname, svar);
 169                 }
 170                 sp = line + 1;
 171                 line = strpbrk(sp, ldelim);
 172         }
 173         vfree(string);
 174
 175         return count;
 176 }
 177
 178 static const struct file_operations zoran_operations = {
 179         .owner          = THIS_MODULE,
 180         .open           = zoran_open,
 181         .read           = seq_read,
 182         .write          = zoran_write,
 183         .llseek         = seq_lseek,
 184         .release        = single_release,
 185 };
 186 #endif
 187
 188 int
 189 zoran_proc_init (struct zoran *zr)
 190 {
 191 #ifdef CONFIG_PROC_FS
 192         char name[8];
 193
 194         snprintf(name, 7, "zoran%d", zr->id);
 195         zr->zoran_proc = proc_create_data(name, 0, NULL, &zoran_operations, zr);
 196         if (zr->zoran_proc != NULL) {
 197                 dprintk(2,
 198                         KERN_INFO
 199                         "%s: procfs entry /proc/%s allocated. data=%p\n",
 200                         ZR_DEVNAME(zr), name, zr);
 201         } else {
 202                 dprintk(1, KERN_ERR "%s: Unable to initialise /proc/%s\n",
 203                         ZR_DEVNAME(zr), name);
 204                 return 1;
 205         }
 206 #endif
 207         return 0;
 208 }
 209
 210 void
 211 zoran_proc_cleanup (struct zoran *zr)
 212 {
 213 #ifdef CONFIG_PROC_FS
 214         char name[8];
 215
 216         snprintf(name, 7, "zoran%d", zr->id);
 217         if (zr->zoran_proc)
 218                 remove_proc_entry(name, NULL);
 219         zr->zoran_proc = NULL;
 220 #endif
 221 }