V4L/DVB (8885): cpia2_usb: fix memory leak
[linux-2.6] / 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/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/videodev.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(inode)->data;
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(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
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 }