78ac8f853748e73e3bd6c7fb18ba86f14fb067c8
[platform/kernel/linux-rpi.git] / 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 }