zoran_procfs.c

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/*
 * Zoran zr36057/zr36067 PCI controller driver, for the
 * Pinnacle/Miro DC10/DC10+/DC30/DC30+, Iomega Buz, Linux
 * Media Labs LML33/LML33R10.
 *
 * This part handles the procFS entries (/proc/ZORAN[%d])
 *
 * Copyright (C) 2000 Serguei Miridonov <[email protected]>
 *
 * Currently maintained by:
 *   Ronald Bultje    <[email protected]>
 *   Laurent Pinchart <[email protected]>
 *   Mailinglist      <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/vmalloc.h>

#include <linux/proc_fs.h>
#include <linux/pci.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/videodev2.h>
#include <linux/spinlock.h>
#include <linux/sem.h>
#include <linux/seq_file.h>

#include <linux/ctype.h>
#include <linux/poll.h>
#include <asm/io.h>

#include "videocodec.h"
#include "zoran.h"
#include "zoran_procfs.h"
#include "zoran_card.h"

#ifdef CONFIG_PROC_FS
struct procfs_params_zr36067 {
    char *name;
    short reg;
    u32 mask;
    short bit;
};

static const struct procfs_params_zr36067 zr67[] = {
    {"HSPol", 0x000, 1, 30},
    {"HStart", 0x000, 0x3ff, 10},
    {"HEnd", 0x000, 0x3ff, 0},

    {"VSPol", 0x004, 1, 30},
    {"VStart", 0x004, 0x3ff, 10},
    {"VEnd", 0x004, 0x3ff, 0},

    {"ExtFl", 0x008, 1, 26},
    {"TopField", 0x008, 1, 25},
    {"VCLKPol", 0x008, 1, 24},
    {"DupFld", 0x008, 1, 20},
    {"LittleEndian", 0x008, 1, 0},

    {"HsyncStart", 0x10c, 0xffff, 16},
    {"LineTot", 0x10c, 0xffff, 0},

    {"NAX", 0x110, 0xffff, 16},
    {"PAX", 0x110, 0xffff, 0},

    {"NAY", 0x114, 0xffff, 16},
    {"PAY", 0x114, 0xffff, 0},

    /* {"",,,}, */

    {NULL, 0, 0, 0},
};

static void
setparam (struct zoran *zr,
      char         *name,
      char         *sval)
{
    int i = 0, reg0, reg, val;

    while (zr67[i].name != NULL) {
        if (!strncmp(name, zr67[i].name, strlen(zr67[i].name))) {
            reg = reg0 = btread(zr67[i].reg);
            reg &= ~(zr67[i].mask << zr67[i].bit);
            if (!isdigit(sval[0]))
                break;
            val = simple_strtoul(sval, NULL, 0);
            if ((val & ~zr67[i].mask))
                break;
            reg |= (val & zr67[i].mask) << zr67[i].bit;
            dprintk(4,
                KERN_INFO
                "%s: setparam: setting ZR36067 register 0x%03x: 0x%08x=>0x%08x %s=%d\n",
                ZR_DEVNAME(zr), zr67[i].reg, reg0, reg,
                zr67[i].name, val);
            btwrite(reg, zr67[i].reg);
            break;
        }
        i++;
    }
}

static int zoran_show(struct seq_file *p, void *v)
{
    struct zoran *zr = p->private;
    int i;

    seq_printf(p, "ZR36067 registers:\n");
    for (i = 0; i < 0x130; i += 16)
        seq_printf(p, "%03X %08X  %08X  %08X  %08X \n", i,
               btread(i), btread(i+4), btread(i+8), btread(i+12));
    return 0;
}

static int zoran_open(struct inode *inode, struct file *file)
{
    struct zoran *data = PDE(inode)->data;
    return single_open(file, zoran_show, data);
}

static ssize_t zoran_write(struct file *file, const char __user *buffer,
            size_t count, loff_t *ppos)
{
    struct zoran *zr = PDE(file->f_path.dentry->d_inode)->data;
    char *string, *sp;
    char *line, *ldelim, *varname, *svar, *tdelim;

    if (count > 32768)  /* Stupidity filter */
        return -EINVAL;

    string = sp = vmalloc(count + 1);
    if (!string) {
        dprintk(1,
            KERN_ERR
            "%s: write_proc: can not allocate memory\n",
            ZR_DEVNAME(zr));
        return -ENOMEM;
    }
    if (copy_from_user(string, buffer, count)) {
        vfree (string);
        return -EFAULT;
    }
    string[count] = 0;
    dprintk(4, KERN_INFO "%s: write_proc: name=%s count=%zu zr=%p\n",
        ZR_DEVNAME(zr), file->f_path.dentry->d_name.name, count, zr);
    ldelim = " \t\n";
    tdelim = "=";
    line = strpbrk(sp, ldelim);
    while (line) {
        *line = 0;
        svar = strpbrk(sp, tdelim);
        if (svar) {
            *svar = 0;
            varname = sp;
            svar++;
            setparam(zr, varname, svar);
        }
        sp = line + 1;
        line = strpbrk(sp, ldelim);
    }
    vfree(string);

    return count;
}

static const struct file_operations zoran_operations = {
    .owner      = THIS_MODULE,
    .open       = zoran_open,
    .read       = seq_read,
    .write      = zoran_write,
    .llseek     = seq_lseek,
    .release    = single_release,
};
#endif

int
zoran_proc_init (struct zoran *zr)
{
#ifdef CONFIG_PROC_FS
    char name[8];

    snprintf(name, 7, "zoran%d", zr->id);
    zr->zoran_proc = proc_create_data(name, 0, NULL, &zoran_operations, zr);
    if (zr->zoran_proc != NULL) {
        dprintk(2,
            KERN_INFO
            "%s: procfs entry /proc/%s allocated. data=%p\n",
            ZR_DEVNAME(zr), name, zr->zoran_proc->data);
    } else {
        dprintk(1, KERN_ERR "%s: Unable to initialise /proc/%s\n",
            ZR_DEVNAME(zr), name);
        return 1;
    }
#endif
    return 0;
}

void
zoran_proc_cleanup (struct zoran *zr)
{
#ifdef CONFIG_PROC_FS
    char name[8];

    snprintf(name, 7, "zoran%d", zr->id);
    if (zr->zoran_proc)
        remove_proc_entry(name, NULL);
    zr->zoran_proc = NULL;
#endif
}