Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Driver for Bt832 CMOS Camera Video Processor |
2 | i2c-addresses: 0x88 or 0x8a | |
3 | ||
4 | The BT832 interfaces to a Quartzsight Digital Camera (352x288, 25 or 30 fps) | |
5 | via a 9 pin connector ( 4-wire SDATA, 2-wire i2c, SCLK, VCC, GND). | |
6 | It outputs an 8-bit 4:2:2 YUV or YCrCb video signal which can be directly | |
7 | connected to bt848/bt878 GPIO pins on this purpose. | |
8 | (see: VLSI Vision Ltd. www.vvl.co.uk for camera datasheets) | |
56fc08ca | 9 | |
1da177e4 LT |
10 | Supported Cards: |
11 | - Pixelview Rev.4E: 0x8a | |
12 | GPIO 0x400000 toggles Bt832 RESET, and the chip changes to i2c 0x88 ! | |
13 | ||
14 | (c) Gunther Mayer, 2002 | |
15 | ||
16 | STATUS: | |
17 | - detect chip and hexdump | |
18 | - reset chip and leave low power mode | |
19 | - detect camera present | |
20 | ||
21 | TODO: | |
22 | - make it work (find correct setup for Bt832 and Bt878) | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/i2c.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/videodev.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/slab.h> | |
33 | ||
56fc08ca MCC |
34 | #include <media/audiochip.h> |
35 | #include <media/id.h> | |
1da177e4 LT |
36 | #include "bttv.h" |
37 | #include "bt832.h" | |
38 | ||
39 | MODULE_LICENSE("GPL"); | |
40 | ||
41 | /* Addresses to scan */ | |
f5bec396 MCC |
42 | static unsigned short normal_i2c[] = { I2C_BT832_ALT1>>1, I2C_BT832_ALT2>>1, |
43 | I2C_CLIENT_END }; | |
1da177e4 LT |
44 | I2C_CLIENT_INSMOD; |
45 | ||
46 | /* ---------------------------------------------------------------------- */ | |
47 | ||
48 | #define dprintk if (debug) printk | |
49 | ||
50 | static int bt832_detach(struct i2c_client *client); | |
51 | ||
52 | ||
53 | static struct i2c_driver driver; | |
54 | static struct i2c_client client_template; | |
55 | ||
56 | struct bt832 { | |
4ac97914 | 57 | struct i2c_client client; |
1da177e4 LT |
58 | }; |
59 | ||
60 | int bt832_hexdump(struct i2c_client *i2c_client_s, unsigned char *buf) | |
61 | { | |
62 | int i,rc; | |
63 | buf[0]=0x80; // start at register 0 with auto-increment | |
4ac97914 MCC |
64 | if (1 != (rc = i2c_master_send(i2c_client_s,buf,1))) |
65 | printk("bt832: i2c i/o error: rc == %d (should be 1)\n",rc); | |
1da177e4 | 66 | |
4ac97914 MCC |
67 | for(i=0;i<65;i++) |
68 | buf[i]=0; | |
69 | if (65 != (rc=i2c_master_recv(i2c_client_s,buf,65))) | |
70 | printk("bt832: i2c i/o error: rc == %d (should be 65)\n",rc); | |
1da177e4 | 71 | |
4ac97914 MCC |
72 | // Note: On READ the first byte is the current index |
73 | // (e.g. 0x80, what we just wrote) | |
1da177e4 | 74 | |
4ac97914 MCC |
75 | if(1) { |
76 | int i; | |
77 | printk("BT832 hexdump:\n"); | |
78 | for(i=1;i<65;i++) { | |
1da177e4 LT |
79 | if(i!=1) { |
80 | if(((i-1)%8)==0) printk(" "); | |
4ac97914 | 81 | if(((i-1)%16)==0) printk("\n"); |
1da177e4 | 82 | } |
4ac97914 MCC |
83 | printk(" %02x",buf[i]); |
84 | } | |
85 | printk("\n"); | |
86 | } | |
1da177e4 LT |
87 | return 0; |
88 | } | |
89 | ||
90 | // Return: 1 (is a bt832), 0 (No bt832 here) | |
91 | int bt832_init(struct i2c_client *i2c_client_s) | |
92 | { | |
93 | unsigned char *buf; | |
94 | int rc; | |
95 | ||
96 | buf=kmalloc(65,GFP_KERNEL); | |
97 | bt832_hexdump(i2c_client_s,buf); | |
56fc08ca | 98 | |
1da177e4 LT |
99 | if(buf[0x40] != 0x31) { |
100 | printk("bt832: this i2c chip is no bt832 (id=%02x). Detaching.\n",buf[0x40]); | |
101 | kfree(buf); | |
102 | return 0; | |
103 | } | |
104 | ||
4ac97914 MCC |
105 | printk("Write 0 tp VPSTATUS\n"); |
106 | buf[0]=BT832_VP_STATUS; // Reg.52 | |
107 | buf[1]= 0x00; | |
108 | if (2 != (rc = i2c_master_send(i2c_client_s,buf,2))) | |
109 | printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc); | |
1da177e4 | 110 | |
4ac97914 | 111 | bt832_hexdump(i2c_client_s,buf); |
1da177e4 LT |
112 | |
113 | ||
114 | // Leave low power mode: | |
115 | printk("Bt832: leave low power mode.\n"); | |
116 | buf[0]=BT832_CAM_SETUP0; //0x39 57 | |
117 | buf[1]=0x08; | |
118 | if (2 != (rc = i2c_master_send(i2c_client_s,buf,2))) | |
4ac97914 | 119 | printk("bt832: i2c i/o error LLPM: rc == %d (should be 2)\n",rc); |
1da177e4 | 120 | |
4ac97914 | 121 | bt832_hexdump(i2c_client_s,buf); |
1da177e4 LT |
122 | |
123 | printk("Write 0 tp VPSTATUS\n"); | |
4ac97914 MCC |
124 | buf[0]=BT832_VP_STATUS; // Reg.52 |
125 | buf[1]= 0x00; | |
126 | if (2 != (rc = i2c_master_send(i2c_client_s,buf,2))) | |
127 | printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc); | |
1da177e4 | 128 | |
4ac97914 | 129 | bt832_hexdump(i2c_client_s,buf); |
1da177e4 LT |
130 | |
131 | ||
132 | // Enable Output | |
133 | printk("Enable Output\n"); | |
134 | buf[0]=BT832_VP_CONTROL1; // Reg.40 | |
135 | buf[1]= 0x27 & (~0x01); // Default | !skip | |
136 | if (2 != (rc = i2c_master_send(i2c_client_s,buf,2))) | |
4ac97914 | 137 | printk("bt832: i2c i/o error EO: rc == %d (should be 2)\n",rc); |
56fc08ca | 138 | |
4ac97914 | 139 | bt832_hexdump(i2c_client_s,buf); |
1da177e4 | 140 | |
1da177e4 | 141 | |
1da177e4 LT |
142 | // for testing (even works when no camera attached) |
143 | printk("bt832: *** Generate NTSC M Bars *****\n"); | |
144 | buf[0]=BT832_VP_TESTCONTROL0; // Reg. 42 | |
145 | buf[1]=3; // Generate NTSC System M bars, Generate Frame timing internally | |
4ac97914 MCC |
146 | if (2 != (rc = i2c_master_send(i2c_client_s,buf,2))) |
147 | printk("bt832: i2c i/o error MBAR: rc == %d (should be 2)\n",rc); | |
1da177e4 LT |
148 | |
149 | printk("Bt832: Camera Present: %s\n", | |
150 | (buf[1+BT832_CAM_STATUS] & BT832_56_CAMERA_PRESENT) ? "yes":"no"); | |
151 | ||
4ac97914 | 152 | bt832_hexdump(i2c_client_s,buf); |
1da177e4 LT |
153 | kfree(buf); |
154 | return 1; | |
155 | } | |
156 | ||
157 | ||
158 | ||
56fc08ca | 159 | static int bt832_attach(struct i2c_adapter *adap, int addr, int kind) |
1da177e4 LT |
160 | { |
161 | struct bt832 *t; | |
162 | ||
163 | printk("bt832_attach\n"); | |
164 | ||
4ac97914 MCC |
165 | client_template.adapter = adap; |
166 | client_template.addr = addr; | |
1da177e4 | 167 | |
4ac97914 | 168 | printk("bt832: chip found @ 0x%x\n", addr<<1); |
1da177e4 | 169 | |
4ac97914 MCC |
170 | if (NULL == (t = kmalloc(sizeof(*t), GFP_KERNEL))) |
171 | return -ENOMEM; | |
1da177e4 LT |
172 | memset(t,0,sizeof(*t)); |
173 | t->client = client_template; | |
4ac97914 MCC |
174 | i2c_set_clientdata(&t->client, t); |
175 | i2c_attach_client(&t->client); | |
1da177e4 LT |
176 | |
177 | if(! bt832_init(&t->client)) { | |
178 | bt832_detach(&t->client); | |
179 | return -1; | |
180 | } | |
56fc08ca | 181 | |
1da177e4 LT |
182 | return 0; |
183 | } | |
184 | ||
185 | static int bt832_probe(struct i2c_adapter *adap) | |
186 | { | |
56fc08ca | 187 | #ifdef I2C_CLASS_TV_ANALOG |
1da177e4 LT |
188 | if (adap->class & I2C_CLASS_TV_ANALOG) |
189 | return i2c_probe(adap, &addr_data, bt832_attach); | |
56fc08ca | 190 | #else |
c7a46533 | 191 | if (adap->id == I2C_HW_B_BT848) |
56fc08ca MCC |
192 | return i2c_probe(adap, &addr_data, bt832_attach); |
193 | #endif | |
1da177e4 LT |
194 | return 0; |
195 | } | |
196 | ||
197 | static int bt832_detach(struct i2c_client *client) | |
198 | { | |
56fc08ca | 199 | struct bt832 *t = i2c_get_clientdata(client); |
1da177e4 LT |
200 | |
201 | printk("bt832: detach.\n"); | |
202 | i2c_detach_client(client); | |
203 | kfree(t); | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static int | |
208 | bt832_command(struct i2c_client *client, unsigned int cmd, void *arg) | |
209 | { | |
56fc08ca | 210 | struct bt832 *t = i2c_get_clientdata(client); |
1da177e4 LT |
211 | |
212 | printk("bt832: command %x\n",cmd); | |
213 | ||
4ac97914 | 214 | switch (cmd) { |
1da177e4 LT |
215 | case BT832_HEXDUMP: { |
216 | unsigned char *buf; | |
217 | buf=kmalloc(65,GFP_KERNEL); | |
218 | bt832_hexdump(&t->client,buf); | |
219 | kfree(buf); | |
220 | } | |
221 | break; | |
222 | case BT832_REATTACH: | |
223 | printk("bt832: re-attach\n"); | |
224 | i2c_del_driver(&driver); | |
225 | i2c_add_driver(&driver); | |
226 | break; | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
231 | /* ----------------------------------------------------------------------- */ | |
232 | ||
233 | static struct i2c_driver driver = { | |
234 | .owner = THIS_MODULE, | |
235 | .name = "i2c bt832 driver", | |
236 | .id = -1, /* FIXME */ | |
237 | .flags = I2C_DF_NOTIFY, | |
238 | .attach_adapter = bt832_probe, | |
239 | .detach_client = bt832_detach, | |
240 | .command = bt832_command, | |
241 | }; | |
242 | static struct i2c_client client_template = | |
243 | { | |
fae91e72 | 244 | .name = "bt832", |
56fc08ca MCC |
245 | .flags = I2C_CLIENT_ALLOW_USE, |
246 | .driver = &driver, | |
1da177e4 LT |
247 | }; |
248 | ||
249 | ||
56fc08ca | 250 | static int __init bt832_init_module(void) |
1da177e4 | 251 | { |
56fc08ca | 252 | return i2c_add_driver(&driver); |
1da177e4 LT |
253 | } |
254 | ||
56fc08ca | 255 | static void __exit bt832_cleanup_module(void) |
1da177e4 LT |
256 | { |
257 | i2c_del_driver(&driver); | |
258 | } | |
259 | ||
260 | module_init(bt832_init_module); | |
261 | module_exit(bt832_cleanup_module); | |
262 | ||
56fc08ca MCC |
263 | /* |
264 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
265 | * --------------------------------------------------------------------------- | |
266 | * Local variables: | |
267 | * c-basic-offset: 8 | |
268 | * End: | |
269 | */ |