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  * 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/types.h>
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/vmalloc.h>
  34
  35 #include <linux/proc_fs.h>
  36 #include <linux/pci.h>
  37 #include <linux/i2c.h>
  38 #include <linux/i2c-algo-bit.h>
  39 #include <linux/videodev2.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/sem.h>
  42 #include <linux/seq_file.h>
  43
  44 #include <linux/ctype.h>
  45 #include <linux/poll.h>
  46 #include <asm/io.h>
  47
  48 #include "videocodec.h"
  49 #include "zoran.h"
  50 #include "zoran_procfs.h"
  51 #include "zoran_card.h"
  52
  53 #ifdef CONFIG_PROC_FS
  54 struct procfs_params_zr36067 {
  55         char *name;
  56         short reg;
  57         u32 mask;
  58         short bit;
  59 };
  60
  61 static const struct procfs_params_zr36067 zr67[] = {
  62         {"HSPol", 0x000, 1, 30},
  63         {"HStart", 0x000, 0x3ff, 10},
  64         {"HEnd", 0x000, 0x3ff, 0},
  65
  66         {"VSPol", 0x004, 1, 30},
  67         {"VStart", 0x004, 0x3ff, 10},
  68         {"VEnd", 0x004, 0x3ff, 0},
  69
  70         {"ExtFl", 0x008, 1, 26},
  71         {"TopField", 0x008, 1, 25},
  72         {"VCLKPol", 0x008, 1, 24},
  73         {"DupFld", 0x008, 1, 20},
  74         {"LittleEndian", 0x008, 1, 0},
  75
  76         {"HsyncStart", 0x10c, 0xffff, 16},
  77         {"LineTot", 0x10c, 0xffff, 0},
  78
  79         {"NAX", 0x110, 0xffff, 16},
  80         {"PAX", 0x110, 0xffff, 0},
  81
  82         {"NAY", 0x114, 0xffff, 16},
  83         {"PAY", 0x114, 0xffff, 0},
  84
  85         /* {"",,,}, */
  86
  87         {NULL, 0, 0, 0},
  88 };
  89
  90 static void
  91 setparam (struct zoran *zr,
  92           char         *name,
  93           char         *sval)
  94 {
  95         int i = 0, reg0, reg, val;
  96
  97         while (zr67[i].name != NULL) {
  98                 if (!strncmp(name, zr67[i].name, strlen(zr67[i].name))) {
  99                         reg = reg0 = btread(zr67[i].reg);
 100                         reg &= ~(zr67[i].mask << zr67[i].bit);
 101                         if (!isdigit(sval[0]))
 102                                 break;
 103                         val = simple_strtoul(sval, NULL, 0);
 104                         if ((val & ~zr67[i].mask))
 105                                 break;
 106                         reg |= (val & zr67[i].mask) << zr67[i].bit;
 107                         dprintk(4,
 108                                 KERN_INFO
 109                                 "%s: setparam: setting ZR36067 register 0x%03x: 0x%08x=>0x%08x %s=%d\n",
 110                                 ZR_DEVNAME(zr), zr67[i].reg, reg0, reg,
 111                                 zr67[i].name, val);
 112                         btwrite(reg, zr67[i].reg);
 113                         break;
 114                 }
 115                 i++;
 116         }
 117 }
 118
 119 static int zoran_show(struct seq_file *p, void *v)
 120 {
 121         struct zoran *zr = p->private;
 122         int i;
 123
 124         seq_printf(p, "ZR36067 registers:\n");
 125         for (i = 0; i < 0x130; i += 16)
 126                 seq_printf(p, "%03X %08X  %08X  %08X  %08X \n", i,
 127                            btread(i), btread(i+4), btread(i+8), btread(i+12));
 128         return 0;
 129 }
 130
 131 static int zoran_open(struct inode *inode, struct file *file)
 132 {
 133         struct zoran *data = PDE_DATA(inode);
 134         return single_open(file, zoran_show, data);
 135 }
 136
 137 static ssize_t zoran_write(struct file *file, const char __user *buffer,
 138                         size_t count, loff_t *ppos)
 139 {
 140         struct zoran *zr = PDE_DATA(file_inode(file));
 141         char *string, *sp;
 142         char *line, *ldelim, *varname, *svar, *tdelim;
 143
 144         if (count > 32768)      /* Stupidity filter */
 145                 return -EINVAL;
 146
 147         string = sp = vmalloc(count + 1);
 148         if (!string) {
 149                 dprintk(1,
 150                         KERN_ERR
 151                         "%s: write_proc: can not allocate memory\n",
 152                         ZR_DEVNAME(zr));
 153                 return -ENOMEM;
 154         }
 155         if (copy_from_user(string, buffer, count)) {
 156                 vfree (string);
 157                 return -EFAULT;
 158         }
 159         string[count] = 0;
 160         dprintk(4, KERN_INFO "%s: write_proc: name=%s count=%zu zr=%p\n",
 161                 ZR_DEVNAME(zr), file->f_path.dentry->d_name.name, count, zr);
 162         ldelim = " \t\n";
 163         tdelim = "=";
 164         line = strpbrk(sp, ldelim);
 165         while (line) {
 166                 *line = 0;
 167                 svar = strpbrk(sp, tdelim);
 168                 if (svar) {
 169                         *svar = 0;
 170                         varname = sp;
 171                         svar++;
 172                         setparam(zr, varname, svar);
 173                 }
 174                 sp = line + 1;
 175                 line = strpbrk(sp, ldelim);
 176         }
 177         vfree(string);
 178
 179         return count;
 180 }
 181
 182 static const struct file_operations zoran_operations = {
 183         .owner          = THIS_MODULE,
 184         .open           = zoran_open,
 185         .read           = seq_read,
 186         .write          = zoran_write,
 187         .llseek         = seq_lseek,
 188         .release        = single_release,
 189 };
 190 #endif
 191
 192 int
 193 zoran_proc_init (struct zoran *zr)
 194 {
 195 #ifdef CONFIG_PROC_FS
 196         char name[8];
 197
 198         snprintf(name, 7, "zoran%d", zr->id);
 199         zr->zoran_proc = proc_create_data(name, 0, NULL, &zoran_operations, zr);
 200         if (zr->zoran_proc != NULL) {
 201                 dprintk(2,
 202                         KERN_INFO
 203                         "%s: procfs entry /proc/%s allocated. data=%p\n",
 204                         ZR_DEVNAME(zr), name, zr->zoran_proc->data);
 205         } else {
 206                 dprintk(1, KERN_ERR "%s: Unable to initialise /proc/%s\n",
 207                         ZR_DEVNAME(zr), name);
 208                 return 1;
 209         }
 210 #endif
 211         return 0;
 212 }
 213
 214 void
 215 zoran_proc_cleanup (struct zoran *zr)
 216 {
 217 #ifdef CONFIG_PROC_FS
 218         char name[8];
 219
 220         snprintf(name, 7, "zoran%d", zr->id);
 221         if (zr->zoran_proc)
 222                 remove_proc_entry(name, NULL);
 223         zr->zoran_proc = NULL;
 224 #endif
 225 }