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);