--- /dev/null
+/* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver.
+ *
+ * Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp>
+ *
+ * This module is based off the the gl861 and vp702x modules.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 2.
+ *
+ * see Documentation/dvb/README.dvb-usb for more information
+ */
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include "friio.h"
+
+struct jdvbt90502_state {
+ struct i2c_adapter *i2c;
+ struct dvb_frontend frontend;
+ struct jdvbt90502_config config;
+};
+
+/* NOTE: TC90502 has 16bit register-address? */
+/* register 0x0100 is used for reading PLL status, so reg is u16 here */
+static int jdvbt90502_reg_read(struct jdvbt90502_state *state,
+ const u16 reg, u8 *buf, const size_t count)
+{
+ int ret;
+ u8 wbuf[3];
+ struct i2c_msg msg[2];
+
+ wbuf[0] = reg & 0xFF;
+ wbuf[1] = 0;
+ wbuf[2] = reg >> 8;
+
+ msg[0].addr = state->config.demod_address;
+ msg[0].flags = 0;
+ msg[0].buf = wbuf;
+ msg[0].len = sizeof(wbuf);
+
+ msg[1].addr = msg[0].addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].buf = buf;
+ msg[1].len = count;
+
+ ret = i2c_transfer(state->i2c, msg, 2);
+ if (ret != 2) {
+ deb_fe(" reg read failed.\n");
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+/* currently 16bit register-address is not used, so reg is u8 here */
+static int jdvbt90502_single_reg_write(struct jdvbt90502_state *state,
+ const u8 reg, const u8 val)
+{
+ struct i2c_msg msg;
+ u8 wbuf[2];
+
+ wbuf[0] = reg;
+ wbuf[1] = val;
+
+ msg.addr = state->config.demod_address;
+ msg.flags = 0;
+ msg.buf = wbuf;
+ msg.len = sizeof(wbuf);
+
+ if (i2c_transfer(state->i2c, &msg, 1) != 1) {
+ deb_fe(" reg write failed.");
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+static int _jdvbt90502_write(struct dvb_frontend *fe, const u8 buf[], int len)
+{
+ struct jdvbt90502_state *state = fe->demodulator_priv;
+ int err, i;
+ for (i = 0; i < len - 1; i++) {
+ err = jdvbt90502_single_reg_write(state,
+ buf[0] + i, buf[i + 1]);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/* read pll status byte via the demodulator's I2C register */
+/* note: Win box reads it by 8B block at the I2C addr 0x30 from reg:0x80 */
+static int jdvbt90502_pll_read(struct jdvbt90502_state *state, u8 *result)
+{
+ int ret;
+
+ /* +1 for reading */
+ u8 pll_addr_byte = (state->config.pll_address << 1) + 1;
+
+ *result = 0;
+
+ ret = jdvbt90502_single_reg_write(state, JDVBT90502_2ND_I2C_REG,
+ pll_addr_byte);
+ if (ret)
+ goto error;
+
+ ret = jdvbt90502_reg_read(state, 0x0100, result, 1);
+ if (ret)
+ goto error;
+
+ deb_fe("PLL read val:%02x\n", *result);
+ return 0;
+
+error:
+ deb_fe("%s:ret == %d\n", __func__, ret);
+ return -EREMOTEIO;
+}
+
+
+/* set pll frequency via the demodulator's I2C register */
+static int jdvbt90502_pll_set_freq(struct jdvbt90502_state *state, u32 freq)
+{
+ int ret;
+ int retry;
+ u8 res1;
+ u8 res2[9];
+
+ u8 pll_freq_cmd[PLL_CMD_LEN];
+ u8 pll_agc_cmd[PLL_CMD_LEN];
+ struct i2c_msg msg[2];
+ u32 f;
+
+ deb_fe("%s: freq=%d, step=%d\n", __func__, freq,
+ state->frontend.ops.info.frequency_stepsize);
+ /* freq -> oscilator frequency conversion. */
+ /* freq: 473,000,000 + n*6,000,000 [+ 142857 (center freq. shift)] */
+ f = freq / state->frontend.ops.info.frequency_stepsize;
+ /* add 399[1/7 MHZ] = 57MHz for the IF */
+ f += 399;
+ /* add center frequency shift if necessary */
+ if (f % 7 == 0)
+ f++;
+ pll_freq_cmd[DEMOD_REDIRECT_REG] = JDVBT90502_2ND_I2C_REG; /* 0xFE */
+ pll_freq_cmd[ADDRESS_BYTE] = state->config.pll_address << 1;
+ pll_freq_cmd[DIVIDER_BYTE1] = (f >> 8) & 0x7F;
+ pll_freq_cmd[DIVIDER_BYTE2] = f & 0xFF;
+ pll_freq_cmd[CONTROL_BYTE] = 0xB2; /* ref.divider:28, 4MHz/28=1/7MHz */
+ pll_freq_cmd[BANDSWITCH_BYTE] = 0x08; /* UHF band */
+
+ msg[0].addr = state->config.demod_address;
+ msg[0].flags = 0;
+ msg[0].buf = pll_freq_cmd;
+ msg[0].len = sizeof(pll_freq_cmd);
+
+ ret = i2c_transfer(state->i2c, &msg[0], 1);
+ if (ret != 1)
+ goto error;
+
+ udelay(50);
+
+ pll_agc_cmd[DEMOD_REDIRECT_REG] = pll_freq_cmd[DEMOD_REDIRECT_REG];
+ pll_agc_cmd[ADDRESS_BYTE] = pll_freq_cmd[ADDRESS_BYTE];
+ pll_agc_cmd[DIVIDER_BYTE1] = pll_freq_cmd[DIVIDER_BYTE1];
+ pll_agc_cmd[DIVIDER_BYTE2] = pll_freq_cmd[DIVIDER_BYTE2];
+ pll_agc_cmd[CONTROL_BYTE] = 0x9A; /* AGC_CTRL instead of BANDSWITCH */
+ pll_agc_cmd[AGC_CTRL_BYTE] = 0x50;
+ /* AGC Time Constant 2s, AGC take-over point:103dBuV(lowest) */
+
+ msg[1].addr = msg[0].addr;
+ msg[1].flags = 0;
+ msg[1].buf = pll_agc_cmd;
+ msg[1].len = sizeof(pll_agc_cmd);
+
+ ret = i2c_transfer(state->i2c, &msg[1], 1);
+ if (ret != 1)
+ goto error;
+
+ /* I don't know what these cmds are for, */
+ /* but the USB log on a windows box contains them */
+ ret = jdvbt90502_single_reg_write(state, 0x01, 0x40);
+ ret |= jdvbt90502_single_reg_write(state, 0x01, 0x00);
+ if (ret)
+ goto error;
+ udelay(100);
+
+ /* wait for the demod to be ready? */
+#define RETRY_COUNT 5
+ for (retry = 0; retry < RETRY_COUNT; retry++) {
+ ret = jdvbt90502_reg_read(state, 0x0096, &res1, 1);
+ if (ret)
+ goto error;
+ /* if (res1 != 0x00) goto error; */
+ ret = jdvbt90502_reg_read(state, 0x00B0, res2, sizeof(res2));
+ if (ret)
+ goto error;
+ if (res2[0] >= 0xA7)
+ break;
+ msleep(100);
+ }
+ if (retry >= RETRY_COUNT) {
+ deb_fe("%s: FE does not get ready after freq setting.\n",
+ __func__);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+error:
+ deb_fe("%s:ret == %d\n", __func__, ret);
+ return -EREMOTEIO;
+}
+
+static int jdvbt90502_read_status(struct dvb_frontend *fe, fe_status_t *state)
+{
+ u8 result;
+ int ret;
+
+ *state = FE_HAS_SIGNAL;
+
+ ret = jdvbt90502_pll_read(fe->demodulator_priv, &result);
+ if (ret) {
+ deb_fe("%s:ret == %d\n", __func__, ret);
+ return -EREMOTEIO;
+ }
+
+ *state = FE_HAS_SIGNAL
+ | FE_HAS_CARRIER
+ | FE_HAS_VITERBI
+ | FE_HAS_SYNC;
+
+ if (result & PLL_STATUS_LOCKED)
+ *state |= FE_HAS_LOCK;
+
+ return 0;
+}
+
+static int jdvbt90502_read_signal_strength(struct dvb_frontend *fe,
+ u16 *strength)
+{
+ int ret;
+ u8 rbuf[37];
+
+ *strength = 0;
+
+ /* status register (incl. signal strength) : 0x89 */
+ /* TODO: read just the necessary registers [0x8B..0x8D]? */
+ ret = jdvbt90502_reg_read(fe->demodulator_priv, 0x0089,
+ rbuf, sizeof(rbuf));
+
+ if (ret) {
+ deb_fe("%s:ret == %d\n", __func__, ret);
+ return -EREMOTEIO;
+ }
+
+ /* signal_strength: rbuf[2-4] (24bit BE), use lower 16bit for now. */
+ *strength = (rbuf[3] << 8) + rbuf[4];
+ if (rbuf[2])
+ *strength = 0xffff;
+
+ return 0;
+}
+
+
+/* filter out un-supported properties to notify users */
+static int jdvbt90502_set_property(struct dvb_frontend *fe,
+ struct dtv_property *tvp)
+{
+ int r = 0;
+
+ switch (tvp->cmd) {
+ case DTV_DELIVERY_SYSTEM:
+ if (tvp->u.data != SYS_ISDBT)
+ r = -EINVAL;
+ break;
+ case DTV_CLEAR:
+ case DTV_TUNE:
+ case DTV_FREQUENCY:
+ break;
+ default:
+ r = -EINVAL;
+ }
+ return r;
+}
+
+static int jdvbt90502_get_frontend(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ p->inversion = INVERSION_AUTO;
+ p->bandwidth_hz = 6000000;
+ p->code_rate_HP = FEC_AUTO;
+ p->code_rate_LP = FEC_AUTO;
+ p->modulation = QAM_64;
+ p->transmission_mode = TRANSMISSION_MODE_AUTO;
+ p->guard_interval = GUARD_INTERVAL_AUTO;
+ p->hierarchy = HIERARCHY_AUTO;
+ return 0;
+}
+
+static int jdvbt90502_set_frontend(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+
+ /**
+ * NOTE: ignore all the parameters except frequency.
+ * others should be fixed to the proper value for ISDB-T,
+ * but don't check here.
+ */
+
+ struct jdvbt90502_state *state = fe->demodulator_priv;
+ int ret;
+
+ deb_fe("%s: Freq:%d\n", __func__, p->frequency);
+
+ /* for recovery from DTV_CLEAN */
+ fe->dtv_property_cache.delivery_system = SYS_ISDBT;
+
+ ret = jdvbt90502_pll_set_freq(state, p->frequency);
+ if (ret) {
+ deb_fe("%s:ret == %d\n", __func__, ret);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+
+/**
+ * (reg, val) commad list to initialize this module.
+ * captured on a Windows box.
+ */
+static u8 init_code[][2] = {
+ {0x01, 0x40},
+ {0x04, 0x38},
+ {0x05, 0x40},
+ {0x07, 0x40},
+ {0x0F, 0x4F},
+ {0x11, 0x21},
+ {0x12, 0x0B},
+ {0x13, 0x2F},
+ {0x14, 0x31},
+ {0x16, 0x02},
+ {0x21, 0xC4},
+ {0x22, 0x20},
+ {0x2C, 0x79},
+ {0x2D, 0x34},
+ {0x2F, 0x00},
+ {0x30, 0x28},
+ {0x31, 0x31},
+ {0x32, 0xDF},
+ {0x38, 0x01},
+ {0x39, 0x78},
+ {0x3B, 0x33},
+ {0x3C, 0x33},
+ {0x48, 0x90},
+ {0x51, 0x68},
+ {0x5E, 0x38},
+ {0x71, 0x00},
+ {0x72, 0x08},
+ {0x77, 0x00},
+ {0xC0, 0x21},
+ {0xC1, 0x10},
+ {0xE4, 0x1A},
+ {0xEA, 0x1F},
+ {0x77, 0x00},
+ {0x71, 0x00},
+ {0x71, 0x00},
+ {0x76, 0x0C},
+};
+
+static const int init_code_len = sizeof(init_code) / sizeof(u8[2]);
+
+static int jdvbt90502_init(struct dvb_frontend *fe)
+{
+ int i = -1;
+ int ret;
+ struct i2c_msg msg;
+
+ struct jdvbt90502_state *state = fe->demodulator_priv;
+
+ deb_fe("%s called.\n", __func__);
+
+ msg.addr = state->config.demod_address;
+ msg.flags = 0;
+ msg.len = 2;
+ for (i = 0; i < init_code_len; i++) {
+ msg.buf = init_code[i];
+ ret = i2c_transfer(state->i2c, &msg, 1);
+ if (ret != 1)
+ goto error;
+ }
+ fe->dtv_property_cache.delivery_system = SYS_ISDBT;
+ msleep(100);
+
+ return 0;
+
+error:
+ deb_fe("%s: init_code[%d] failed. ret==%d\n", __func__, i, ret);
+ return -EREMOTEIO;
+}
+
+
+static void jdvbt90502_release(struct dvb_frontend *fe)
+{
+ struct jdvbt90502_state *state = fe->demodulator_priv;
+ kfree(state);
+}
+
+
+static struct dvb_frontend_ops jdvbt90502_ops;
+
+struct dvb_frontend *jdvbt90502_attach(struct dvb_usb_device *d)
+{
+ struct jdvbt90502_state *state = NULL;
+
+ deb_info("%s called.\n", __func__);
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct jdvbt90502_state), GFP_KERNEL);
+ if (state == NULL)
+ goto error;
+
+ /* setup the state */
+ state->i2c = &d->i2c_adap;
+ state->config = friio_fe_config;
+
+ /* create dvb_frontend */
+ state->frontend.ops = jdvbt90502_ops;
+ state->frontend.demodulator_priv = state;
+
+ if (jdvbt90502_init(&state->frontend) < 0)
+ goto error;
+
+ return &state->frontend;
+
+error:
+ kfree(state);
+ return NULL;
+}
+
+static struct dvb_frontend_ops jdvbt90502_ops = {
+ .delsys = { SYS_ISDBT },
+ .info = {
+ .name = "Comtech JDVBT90502 ISDB-T",
+ .frequency_min = 473000000, /* UHF 13ch, center */
+ .frequency_max = 767142857, /* UHF 62ch, center */
+ .frequency_stepsize = JDVBT90502_PLL_CLK / JDVBT90502_PLL_DIVIDER,
+ .frequency_tolerance = 0,
+
+ /* NOTE: this driver ignores all parameters but frequency. */
+ .caps = FE_CAN_INVERSION_AUTO |
+ FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+ FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
+ FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
+ FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+ FE_CAN_TRANSMISSION_MODE_AUTO |
+ FE_CAN_GUARD_INTERVAL_AUTO |
+ FE_CAN_HIERARCHY_AUTO,
+ },
+
+ .release = jdvbt90502_release,
+
+ .init = jdvbt90502_init,
+ .write = _jdvbt90502_write,
+
+ .set_property = jdvbt90502_set_property,
+
+ .set_frontend = jdvbt90502_set_frontend,
+ .get_frontend = jdvbt90502_get_frontend,
+
+ .read_status = jdvbt90502_read_status,
+ .read_signal_strength = jdvbt90502_read_signal_strength,
+};
Code Review / kvmfornfv.git / blobdiff