/home/lenb/src/to-linus-stable branch 'acpi-2.6.12'
[linux-2.6] / drivers / media / dvb / frontends / dib3000-common.c
1 #include "dib3000-common.h"
2
3 #ifdef CONFIG_DVB_DIBCOM_DEBUG
4 static int debug;
5 module_param(debug, int, 0644);
6 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=i2c,4=srch (|-able)).");
7 #endif
8 #define deb_info(args...) dprintk(0x01,args)
9 #define deb_i2c(args...) dprintk(0x02,args)
10 #define deb_srch(args...) dprintk(0x04,args)
11
12
13 int dib3000_read_reg(struct dib3000_state *state, u16 reg)
14 {
15         u8 wb[] = { ((reg >> 8) | 0x80) & 0xff, reg & 0xff };
16         u8 rb[2];
17         struct i2c_msg msg[] = {
18                 { .addr = state->config.demod_address, .flags = 0,        .buf = wb, .len = 2 },
19                 { .addr = state->config.demod_address, .flags = I2C_M_RD, .buf = rb, .len = 2 },
20         };
21
22         if (i2c_transfer(state->i2c, msg, 2) != 2)
23                 deb_i2c("i2c read error\n");
24
25         deb_i2c("reading i2c bus (reg: %5d 0x%04x, val: %5d 0x%04x)\n",reg,reg,
26                         (rb[0] << 8) | rb[1],(rb[0] << 8) | rb[1]);
27
28         return (rb[0] << 8) | rb[1];
29 }
30
31 int dib3000_write_reg(struct dib3000_state *state, u16 reg, u16 val)
32 {
33         u8 b[] = {
34                 (reg >> 8) & 0xff, reg & 0xff,
35                 (val >> 8) & 0xff, val & 0xff,
36         };
37         struct i2c_msg msg[] = {
38                 { .addr = state->config.demod_address, .flags = 0, .buf = b, .len = 4 }
39         };
40         deb_i2c("writing i2c bus (reg: %5d 0x%04x, val: %5d 0x%04x)\n",reg,reg,val,val);
41
42         return i2c_transfer(state->i2c,msg, 1) != 1 ? -EREMOTEIO : 0;
43 }
44
45 int dib3000_search_status(u16 irq,u16 lock)
46 {
47         if (irq & 0x02) {
48                 if (lock & 0x01) {
49                         deb_srch("auto search succeeded\n");
50                         return 1; // auto search succeeded
51                 } else {
52                         deb_srch("auto search not successful\n");
53                         return 0; // auto search failed
54                 }
55         } else if (irq & 0x01)  {
56                 deb_srch("auto search failed\n");
57                 return 0; // auto search failed
58         }
59         return -1; // try again
60 }
61
62 /* for auto search */
63 u16 dib3000_seq[2][2][2] =     /* fft,gua,   inv   */
64         { /* fft */
65                 { /* gua */
66                         { 0, 1 },                   /*  0   0   { 0,1 } */
67                         { 3, 9 },                   /*  0   1   { 0,1 } */
68                 },
69                 {
70                         { 2, 5 },                   /*  1   0   { 0,1 } */
71                         { 6, 11 },                  /*  1   1   { 0,1 } */
72                 }
73         };
74
75 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de");
76 MODULE_DESCRIPTION("Common functions for the dib3000mb/dib3000mc dvb frontend drivers");
77 MODULE_LICENSE("GPL");
78
79 EXPORT_SYMBOL(dib3000_seq);
80
81 EXPORT_SYMBOL(dib3000_read_reg);
82 EXPORT_SYMBOL(dib3000_write_reg);
83 EXPORT_SYMBOL(dib3000_search_status);