264 lines
6.9 KiB
C
264 lines
6.9 KiB
C
/*
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* dvb-dtt200u-fe.c is a driver which implements the frontend-part of the
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* Yakumo/Typhoon/Hama USB2.0 boxes. It is hard-wired to the dibusb-driver as
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* it uses the usb-transfer functions directly (maybe creating a
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* generic-dvb-usb-lib for all usb-drivers will be reduce some more code.)
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*
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* Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
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*
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* see dvb-dibusb-core.c for copyright details.
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*/
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/* guessed protocol description (reverse engineered):
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* read
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* 00 - USB type 0x02 for usb2.0, 0x01 for usb1.1
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* 81 - <TS_LOCK> <current frequency divided by 250000>
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* 82 - crash - do not touch
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* 83 - crash - do not touch
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* 84 - remote control
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* 85 - crash - do not touch (OK, stop testing here)
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* 88 - locking 2 bytes (0x80 0x40 == no signal, 0x89 0x20 == nice signal)
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* 89 - noise-to-signal
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* 8a - unkown 1 byte - signal_strength
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* 8c - ber ???
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* 8d - ber
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* 8e - unc
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*
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* write
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* 02 - bandwidth
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* 03 - frequency (divided by 250000)
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* 04 - pid table (index pid(7:0) pid(12:8))
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* 05 - reset the pid table
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* 08 - demod transfer enabled or not (FX2 transfer is enabled by default)
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*/
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#include "dvb-dibusb.h"
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#include "dvb_frontend.h"
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struct dtt200u_fe_state {
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struct usb_dibusb *dib;
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struct dvb_frontend_parameters fep;
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struct dvb_frontend frontend;
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};
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#define moan(which,what) info("unexpected value in '%s' for cmd '%02x' - please report to linux-dvb@linuxtv.org",which,what)
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static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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u8 bw[1] = { 0x81 };
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u8 br[3] = { 0 };
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// u8 bdeb[5] = { 0 };
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dibusb_readwrite_usb(state->dib,bw,1,br,3);
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switch (br[0]) {
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case 0x01:
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*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
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break;
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case 0x00:
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*stat = 0;
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break;
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default:
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moan("br[0]",0x81);
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break;
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}
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// bw[0] = 0x88;
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// dibusb_readwrite_usb(state->dib,bw,1,bdeb,5);
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// deb_info("%02x: %02x %02x %02x %02x %02x\n",bw[0],bdeb[0],bdeb[1],bdeb[2],bdeb[3],bdeb[4]);
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return 0;
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}
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static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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u8 bw[1] = { 0x8d };
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*ber = 0;
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dibusb_readwrite_usb(state->dib,bw,1,(u8*) ber, 3);
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return 0;
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}
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static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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u8 bw[1] = { 0x8c };
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*unc = 0;
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dibusb_readwrite_usb(state->dib,bw,1,(u8*) unc, 3);
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return 0;
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}
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static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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u8 bw[1] = { 0x8a };
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u8 b;
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dibusb_readwrite_usb(state->dib,bw,1,&b, 1);
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*strength = (b << 8) | b;
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return 0;
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}
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static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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u8 bw[1] = { 0x89 };
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u8 br[1] = { 0 };
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dibusb_readwrite_usb(state->dib,bw,1,br,1);
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*snr = ((0xff - br[0]) << 8) | (0xff - br[0]);
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return 0;
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}
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static int dtt200u_fe_init(struct dvb_frontend* fe)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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u8 b[] = { 0x01 };
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return dibusb_write_usb(state->dib,b,1);
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}
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static int dtt200u_fe_sleep(struct dvb_frontend* fe)
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{
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return dtt200u_fe_init(fe);
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}
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static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
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{
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tune->min_delay_ms = 1500;
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tune->step_size = 166667;
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tune->max_drift = 166667 * 2;
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return 0;
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}
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static int dtt200u_fe_set_frontend(struct dvb_frontend* fe,
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struct dvb_frontend_parameters *fep)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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u16 freq = fep->frequency / 250000;
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u8 bw,bwbuf[2] = { 0x03, 0 }, freqbuf[3] = { 0x02, 0, 0 };
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switch (fep->u.ofdm.bandwidth) {
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case BANDWIDTH_8_MHZ: bw = 8; break;
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case BANDWIDTH_7_MHZ: bw = 7; break;
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case BANDWIDTH_6_MHZ: bw = 6; break;
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case BANDWIDTH_AUTO: return -EOPNOTSUPP;
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default:
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return -EINVAL;
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}
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deb_info("set_frontend\n");
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bwbuf[1] = bw;
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dibusb_write_usb(state->dib,bwbuf,2);
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freqbuf[1] = freq & 0xff;
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freqbuf[2] = (freq >> 8) & 0xff;
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dibusb_write_usb(state->dib,freqbuf,3);
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memcpy(&state->fep,fep,sizeof(struct dvb_frontend_parameters));
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return 0;
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}
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static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
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struct dvb_frontend_parameters *fep)
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{
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struct dtt200u_fe_state *state = fe->demodulator_priv;
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memcpy(fep,&state->fep,sizeof(struct dvb_frontend_parameters));
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return 0;
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}
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static void dtt200u_fe_release(struct dvb_frontend* fe)
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{
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struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
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kfree(state);
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}
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static int dtt200u_pid_control(struct dvb_frontend *fe,int index, int pid,int onoff)
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{
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struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
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u8 b_pid[4];
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pid = onoff ? pid : 0;
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b_pid[0] = 0x04;
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b_pid[1] = index;
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b_pid[2] = pid & 0xff;
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b_pid[3] = (pid >> 8) & 0xff;
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dibusb_write_usb(state->dib,b_pid,4);
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return 0;
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}
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static int dtt200u_fifo_control(struct dvb_frontend *fe, int onoff)
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{
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struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
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u8 b_streaming[2] = { 0x08, onoff };
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u8 b_rst_pid[1] = { 0x05 };
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dibusb_write_usb(state->dib,b_streaming,2);
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if (!onoff)
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dibusb_write_usb(state->dib,b_rst_pid,1);
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return 0;
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}
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static struct dvb_frontend_ops dtt200u_fe_ops;
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struct dvb_frontend* dtt200u_fe_attach(struct usb_dibusb *dib, struct dib_fe_xfer_ops *xfer_ops)
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{
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struct dtt200u_fe_state* state = NULL;
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/* allocate memory for the internal state */
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state = (struct dtt200u_fe_state*) kmalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
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if (state == NULL)
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goto error;
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memset(state,0,sizeof(struct dtt200u_fe_state));
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deb_info("attaching frontend dtt200u\n");
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state->dib = dib;
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state->frontend.ops = &dtt200u_fe_ops;
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state->frontend.demodulator_priv = state;
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xfer_ops->fifo_ctrl = dtt200u_fifo_control;
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xfer_ops->pid_ctrl = dtt200u_pid_control;
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goto success;
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error:
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return NULL;
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success:
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return &state->frontend;
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}
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static struct dvb_frontend_ops dtt200u_fe_ops = {
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.info = {
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.name = "DTT200U (Yakumo/Typhoon/Hama) DVB-T",
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.type = FE_OFDM,
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.frequency_min = 44250000,
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.frequency_max = 867250000,
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.frequency_stepsize = 250000,
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.caps = FE_CAN_INVERSION_AUTO |
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FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
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FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
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FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
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FE_CAN_TRANSMISSION_MODE_AUTO |
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FE_CAN_GUARD_INTERVAL_AUTO |
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FE_CAN_RECOVER |
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FE_CAN_HIERARCHY_AUTO,
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},
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.release = dtt200u_fe_release,
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.init = dtt200u_fe_init,
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.sleep = dtt200u_fe_sleep,
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.set_frontend = dtt200u_fe_set_frontend,
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.get_frontend = dtt200u_fe_get_frontend,
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.get_tune_settings = dtt200u_fe_get_tune_settings,
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.read_status = dtt200u_fe_read_status,
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.read_ber = dtt200u_fe_read_ber,
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.read_signal_strength = dtt200u_fe_read_signal_strength,
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.read_snr = dtt200u_fe_read_snr,
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.read_ucblocks = dtt200u_fe_read_unc_blocks,
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};
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