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1da177e4 LT |
1 | /* |
2 | zr36120_i2c.c - Zoran 36120/36125 based framegrabbers | |
3 | ||
4 | Copyright (C) 1998-1999 Pauline Middelink <middelin@polyware.nl> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/types.h> | |
22 | #include <linux/delay.h> | |
23 | #include <asm/io.h> | |
24 | ||
25 | #include <linux/video_decoder.h> | |
26 | #include <asm/uaccess.h> | |
27 | ||
28 | #include "tuner.h" | |
29 | #include "zr36120.h" | |
30 | ||
31 | /* ----------------------------------------------------------------------- */ | |
32 | /* I2C functions */ | |
33 | /* ----------------------------------------------------------------------- */ | |
34 | ||
35 | /* software I2C functions */ | |
36 | ||
37 | #define I2C_DELAY 10 | |
38 | ||
39 | static void i2c_setlines(struct i2c_bus *bus,int ctrl,int data) | |
40 | { | |
41 | struct zoran *ztv = (struct zoran*)bus->data; | |
42 | unsigned int b = 0; | |
43 | if (data) b |= ztv->card->swapi2c ? ZORAN_I2C_SCL : ZORAN_I2C_SDA; | |
44 | if (ctrl) b |= ztv->card->swapi2c ? ZORAN_I2C_SDA : ZORAN_I2C_SCL; | |
45 | zrwrite(b, ZORAN_I2C); | |
46 | udelay(I2C_DELAY); | |
47 | } | |
48 | ||
49 | static int i2c_getdataline(struct i2c_bus *bus) | |
50 | { | |
51 | struct zoran *ztv = (struct zoran*)bus->data; | |
52 | if (ztv->card->swapi2c) | |
53 | return zrread(ZORAN_I2C) & ZORAN_I2C_SCL; | |
54 | return zrread(ZORAN_I2C) & ZORAN_I2C_SDA; | |
55 | } | |
56 | ||
57 | static | |
58 | void attach_inform(struct i2c_bus *bus, int id) | |
59 | { | |
60 | struct zoran *ztv = (struct zoran*)bus->data; | |
61 | struct video_decoder_capability dc; | |
62 | int rv; | |
63 | ||
64 | switch (id) { | |
65 | case I2C_DRIVERID_VIDEODECODER: | |
66 | DEBUG(printk(CARD_INFO "decoder attached\n",CARD)); | |
67 | ||
68 | /* fetch the capabilites of the decoder */ | |
69 | rv = i2c_control_device(&ztv->i2c, I2C_DRIVERID_VIDEODECODER, DECODER_GET_CAPABILITIES, &dc); | |
70 | if (rv) { | |
71 | DEBUG(printk(CARD_DEBUG "decoder is not V4L aware!\n",CARD)); | |
72 | break; | |
73 | } | |
74 | DEBUG(printk(CARD_DEBUG "capabilities %d %d %d\n",CARD,dc.flags,dc.inputs,dc.outputs)); | |
75 | ||
76 | /* Test if the decoder can de VBI transfers */ | |
77 | if (dc.flags & 16 /*VIDEO_DECODER_VBI*/) | |
78 | ztv->have_decoder = 2; | |
79 | else | |
80 | ztv->have_decoder = 1; | |
81 | break; | |
82 | case I2C_DRIVERID_TUNER: | |
83 | ztv->have_tuner = 1; | |
84 | DEBUG(printk(CARD_INFO "tuner attached\n",CARD)); | |
85 | if (ztv->tuner_type >= 0) | |
86 | { | |
87 | if (i2c_control_device(&ztv->i2c,I2C_DRIVERID_TUNER,TUNER_SET_TYPE,&ztv->tuner_type)<0) | |
88 | DEBUG(printk(CARD_INFO "attach_inform; tuner won't be set to type %d\n",CARD,ztv->tuner_type)); | |
89 | } | |
90 | break; | |
91 | default: | |
92 | DEBUG(printk(CARD_INFO "attach_inform; unknown device id=%d\n",CARD,id)); | |
93 | break; | |
94 | } | |
95 | } | |
96 | ||
97 | static | |
98 | void detach_inform(struct i2c_bus *bus, int id) | |
99 | { | |
100 | struct zoran *ztv = (struct zoran*)bus->data; | |
101 | ||
102 | switch (id) { | |
103 | case I2C_DRIVERID_VIDEODECODER: | |
104 | ztv->have_decoder = 0; | |
105 | DEBUG(printk(CARD_INFO "decoder detached\n",CARD)); | |
106 | break; | |
107 | case I2C_DRIVERID_TUNER: | |
108 | ztv->have_tuner = 0; | |
109 | DEBUG(printk(CARD_INFO "tuner detached\n",CARD)); | |
110 | break; | |
111 | default: | |
112 | DEBUG(printk(CARD_INFO "detach_inform; unknown device id=%d\n",CARD,id)); | |
113 | break; | |
114 | } | |
115 | } | |
116 | ||
117 | struct i2c_bus zoran_i2c_bus_template = | |
118 | { | |
119 | "ZR36120", | |
120 | I2C_BUSID_ZORAN, | |
121 | NULL, | |
122 | ||
123 | SPIN_LOCK_UNLOCKED, | |
124 | ||
125 | attach_inform, | |
126 | detach_inform, | |
127 | ||
128 | i2c_setlines, | |
129 | i2c_getdataline, | |
130 | NULL, | |
131 | NULL | |
132 | }; |