linux/drivers/media/video/zoran/zoran_procfs.c
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   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
  54struct procfs_params_zr36067 {
  55        char *name;
  56        short reg;
  57        u32 mask;
  58        short bit;
  59};
  60
  61static 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
  90static void
  91setparam (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
 119static 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
 131static int zoran_open(struct inode *inode, struct file *file)
 132{
 133        struct zoran *data = PDE(inode)->data;
 134        return single_open(file, zoran_show, data);
 135}
 136
 137static ssize_t zoran_write(struct file *file, const char __user *buffer,
 138                        size_t count, loff_t *ppos)
 139{
 140        struct zoran *zr = PDE(file->f_path.dentry->d_inode)->data;
 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
 182static 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
 192int
 193zoran_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
 214void
 215zoran_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}
 226