1 files changed, 473 insertions, 0 deletions

diff --git a/drivers/media/usb/dvb-usb/friio-fe.c b/drivers/media/usb/dvb-usb/friio-fe.c
new file mode 100644
index 000000000000..90a70c66a96e
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/friio-fe.c
@@ -0,0 +1,473 @@
+/* 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;
+        memcpy(&state->config, &friio_fe_config, sizeof(friio_fe_config));
+
+        /* create dvb_frontend */
+        memcpy(&state->frontend.ops, &jdvbt90502_ops,
+               sizeof(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,
+};