1 /* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver.
3 * Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp>
5 * This module is based off the the gl861 and vp702x modules.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation, version 2.
11 * see Documentation/dvb/README.dvb-usb for more information
13 #include <linux/init.h>
14 #include <linux/string.h>
15 #include <linux/slab.h>
19 struct jdvbt90502_state {
20 struct i2c_adapter *i2c;
21 struct dvb_frontend frontend;
22 struct jdvbt90502_config config;
25 /* NOTE: TC90502 has 16bit register-address? */
26 /* register 0x0100 is used for reading PLL status, so reg is u16 here */
27 static int jdvbt90502_reg_read(struct jdvbt90502_state *state,
28 const u16 reg, u8 *buf, const size_t count)
32 struct i2c_msg msg[2];
38 msg[0].addr = state->config.demod_address;
41 msg[0].len = sizeof(wbuf);
43 msg[1].addr = msg[0].addr;
44 msg[1].flags = I2C_M_RD;
48 ret = i2c_transfer(state->i2c, msg, 2);
50 deb_fe(" reg read failed.\n");
56 /* currently 16bit register-address is not used, so reg is u8 here */
57 static int jdvbt90502_single_reg_write(struct jdvbt90502_state *state,
58 const u8 reg, const u8 val)
66 msg.addr = state->config.demod_address;
69 msg.len = sizeof(wbuf);
71 if (i2c_transfer(state->i2c, &msg, 1) != 1) {
72 deb_fe(" reg write failed.");
78 static int _jdvbt90502_write(struct dvb_frontend *fe, u8 *buf, int len)
80 struct jdvbt90502_state *state = fe->demodulator_priv;
82 for (i = 0; i < len - 1; i++) {
83 err = jdvbt90502_single_reg_write(state,
84 buf[0] + i, buf[i + 1]);
92 /* read pll status byte via the demodulator's I2C register */
93 /* note: Win box reads it by 8B block at the I2C addr 0x30 from reg:0x80 */
94 static int jdvbt90502_pll_read(struct jdvbt90502_state *state, u8 *result)
99 u8 pll_addr_byte = (state->config.pll_address << 1) + 1;
103 ret = jdvbt90502_single_reg_write(state, JDVBT90502_2ND_I2C_REG,
108 ret = jdvbt90502_reg_read(state, 0x0100, result, 1);
112 deb_fe("PLL read val:%02x\n", *result);
116 deb_fe("%s:ret == %d\n", __func__, ret);
121 /* set pll frequency via the demodulator's I2C register */
122 static int jdvbt90502_pll_set_freq(struct jdvbt90502_state *state, u32 freq)
129 u8 pll_freq_cmd[PLL_CMD_LEN];
130 u8 pll_agc_cmd[PLL_CMD_LEN];
131 struct i2c_msg msg[2];
134 deb_fe("%s: freq=%d, step=%d\n", __func__, freq,
135 state->frontend.ops.info.frequency_stepsize);
136 /* freq -> oscilator frequency conversion. */
137 /* freq: 473,000,000 + n*6,000,000 (no 1/7MHz shift to center freq) */
138 /* add 400[1/7 MHZ] = 57.142857MHz. 57MHz for the IF, */
139 /* 1/7MHz for center freq shift */
140 f = freq / state->frontend.ops.info.frequency_stepsize;
142 pll_freq_cmd[DEMOD_REDIRECT_REG] = JDVBT90502_2ND_I2C_REG; /* 0xFE */
143 pll_freq_cmd[ADDRESS_BYTE] = state->config.pll_address << 1;
144 pll_freq_cmd[DIVIDER_BYTE1] = (f >> 8) & 0x7F;
145 pll_freq_cmd[DIVIDER_BYTE2] = f & 0xFF;
146 pll_freq_cmd[CONTROL_BYTE] = 0xB2; /* ref.divider:28, 4MHz/28=1/7MHz */
147 pll_freq_cmd[BANDSWITCH_BYTE] = 0x08; /* UHF band */
149 msg[0].addr = state->config.demod_address;
151 msg[0].buf = pll_freq_cmd;
152 msg[0].len = sizeof(pll_freq_cmd);
154 ret = i2c_transfer(state->i2c, &msg[0], 1);
160 pll_agc_cmd[DEMOD_REDIRECT_REG] = pll_freq_cmd[DEMOD_REDIRECT_REG];
161 pll_agc_cmd[ADDRESS_BYTE] = pll_freq_cmd[ADDRESS_BYTE];
162 pll_agc_cmd[DIVIDER_BYTE1] = pll_freq_cmd[DIVIDER_BYTE1];
163 pll_agc_cmd[DIVIDER_BYTE2] = pll_freq_cmd[DIVIDER_BYTE2];
164 pll_agc_cmd[CONTROL_BYTE] = 0x9A; /* AGC_CTRL instead of BANDSWITCH */
165 pll_agc_cmd[AGC_CTRL_BYTE] = 0x50;
166 /* AGC Time Constant 2s, AGC take-over point:103dBuV(lowest) */
168 msg[1].addr = msg[0].addr;
170 msg[1].buf = pll_agc_cmd;
171 msg[1].len = sizeof(pll_agc_cmd);
173 ret = i2c_transfer(state->i2c, &msg[1], 1);
177 /* I don't know what these cmds are for, */
178 /* but the USB log on a windows box contains them */
179 ret = jdvbt90502_single_reg_write(state, 0x01, 0x40);
180 ret |= jdvbt90502_single_reg_write(state, 0x01, 0x00);
185 /* wait for the demod to be ready? */
186 #define RETRY_COUNT 5
187 for (retry = 0; retry < RETRY_COUNT; retry++) {
188 ret = jdvbt90502_reg_read(state, 0x0096, &res1, 1);
191 /* if (res1 != 0x00) goto error; */
192 ret = jdvbt90502_reg_read(state, 0x00B0, res2, sizeof(res2));
199 if (retry >= RETRY_COUNT) {
200 deb_fe("%s: FE does not get ready after freq setting.\n",
207 deb_fe("%s:ret == %d\n", __func__, ret);
211 static int jdvbt90502_read_status(struct dvb_frontend *fe, fe_status_t *state)
216 *state = FE_HAS_SIGNAL;
218 ret = jdvbt90502_pll_read(fe->demodulator_priv, &result);
220 deb_fe("%s:ret == %d\n", __func__, ret);
224 *state = FE_HAS_SIGNAL
229 if (result & PLL_STATUS_LOCKED)
230 *state |= FE_HAS_LOCK;
235 static int jdvbt90502_read_ber(struct dvb_frontend *fe, u32 *ber)
241 static int jdvbt90502_read_signal_strength(struct dvb_frontend *fe,
249 /* status register (incl. signal strength) : 0x89 */
250 /* TODO: read just the necessary registers [0x8B..0x8D]? */
251 ret = jdvbt90502_reg_read(fe->demodulator_priv, 0x0089,
255 deb_fe("%s:ret == %d\n", __func__, ret);
259 /* signal_strength: rbuf[2-4] (24bit BE), use lower 16bit for now. */
260 *strength = (rbuf[3] << 8) + rbuf[4];
267 static int jdvbt90502_read_snr(struct dvb_frontend *fe, u16 *snr)
273 static int jdvbt90502_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
279 static int jdvbt90502_get_tune_settings(struct dvb_frontend *fe,
280 struct dvb_frontend_tune_settings *fs)
282 fs->min_delay_ms = 500;
289 static int jdvbt90502_get_frontend(struct dvb_frontend *fe,
290 struct dvb_frontend_parameters *p)
292 p->inversion = INVERSION_AUTO;
293 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
294 p->u.ofdm.code_rate_HP = FEC_AUTO;
295 p->u.ofdm.code_rate_LP = FEC_AUTO;
296 p->u.ofdm.constellation = QAM_64;
297 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
298 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
299 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
303 static int jdvbt90502_set_frontend(struct dvb_frontend *fe,
304 struct dvb_frontend_parameters *p)
307 * NOTE: ignore all the paramters except frequency.
308 * others should be fixed to the proper value for ISDB-T,
309 * but don't check here.
312 struct jdvbt90502_state *state = fe->demodulator_priv;
315 deb_fe("%s: Freq:%d\n", __func__, p->frequency);
317 ret = jdvbt90502_pll_set_freq(state, p->frequency);
319 deb_fe("%s:ret == %d\n", __func__, ret);
326 static int jdvbt90502_sleep(struct dvb_frontend *fe)
328 deb_fe("%s called.\n", __func__);
334 * (reg, val) commad list to initialize this module.
335 * captured on a Windows box.
337 static u8 init_code[][2] = {
376 const static int init_code_len = sizeof(init_code) / sizeof(u8[2]);
378 static int jdvbt90502_init(struct dvb_frontend *fe)
384 struct jdvbt90502_state *state = fe->demodulator_priv;
386 deb_fe("%s called.\n", __func__);
388 msg.addr = state->config.demod_address;
391 for (i = 0; i < init_code_len; i++) {
392 msg.buf = init_code[i];
393 ret = i2c_transfer(state->i2c, &msg, 1);
402 deb_fe("%s: init_code[%d] failed. ret==%d\n", __func__, i, ret);
407 static void jdvbt90502_release(struct dvb_frontend *fe)
409 struct jdvbt90502_state *state = fe->demodulator_priv;
414 static struct dvb_frontend_ops jdvbt90502_ops;
416 struct dvb_frontend *jdvbt90502_attach(struct dvb_usb_device *d)
418 struct jdvbt90502_state *state = NULL;
420 deb_info("%s called.\n", __func__);
422 /* allocate memory for the internal state */
423 state = kzalloc(sizeof(struct jdvbt90502_state), GFP_KERNEL);
427 /* setup the state */
428 state->i2c = &d->i2c_adap;
429 memcpy(&state->config, &friio_fe_config, sizeof(friio_fe_config));
431 /* create dvb_frontend */
432 memcpy(&state->frontend.ops, &jdvbt90502_ops,
433 sizeof(jdvbt90502_ops));
434 state->frontend.demodulator_priv = state;
436 if (jdvbt90502_init(&state->frontend) < 0)
439 return &state->frontend;
446 static struct dvb_frontend_ops jdvbt90502_ops = {
449 .name = "Comtech JDVBT90502 ISDB-T",
451 .frequency_min = 473000000, /* UHF 13ch, center */
452 .frequency_max = 767142857, /* UHF 62ch, center */
453 .frequency_stepsize = JDVBT90502_PLL_CLK /
454 JDVBT90502_PLL_DIVIDER,
455 .frequency_tolerance = 0,
457 /* NOTE: this driver ignores all parameters but frequency. */
458 .caps = FE_CAN_INVERSION_AUTO |
459 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
460 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
461 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
462 FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
463 FE_CAN_TRANSMISSION_MODE_AUTO |
464 FE_CAN_GUARD_INTERVAL_AUTO |
465 FE_CAN_HIERARCHY_AUTO,
468 .release = jdvbt90502_release,
470 .init = jdvbt90502_init,
471 .sleep = jdvbt90502_sleep,
472 .write = _jdvbt90502_write,
474 .set_frontend = jdvbt90502_set_frontend,
475 .get_frontend = jdvbt90502_get_frontend,
476 .get_tune_settings = jdvbt90502_get_tune_settings,
478 .read_status = jdvbt90502_read_status,
479 .read_ber = jdvbt90502_read_ber,
480 .read_signal_strength = jdvbt90502_read_signal_strength,
481 .read_snr = jdvbt90502_read_snr,
482 .read_ucblocks = jdvbt90502_read_ucblocks,