V4L/DVB (9026): Add support for ST STV0288 demodulator and cards with it.

Add support for ST STV0288 demodulator and cards with it,
such as TeVii S420.
Patch is co-authored with Georg Acher <acher@baycom.de>

Signed-off-by: Georg Acher <acher@baycom.de>
Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 606 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/stv0288.c b/drivers/media/dvb/frontends/stv0288.c
new file mode 100644
index 000000000000..90e72e771a04
--- /dev/null
+++ b/drivers/media/dvb/frontends/stv0288.c
@@ -0,0 +1,606 @@
+/*
+        Driver for ST STV0288 demodulator
+        Copyright (C) 2006 Georg Acher, BayCom GmbH, acher (at) baycom (dot) de
+                for Reel Multimedia
+        Copyright (C) 2008 TurboSight.com, Bob Liu <bob@turbosight.com>
+        Copyright (C) 2008 Igor M. Liplianin <liplianin@me.by>
+                Removed stb6000 specific tuner code and revised some
+                procedures.
+
+        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; either version 2 of the License, or
+        (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+        GNU General Public License for more details.
+
+        You should have received a copy of the GNU General Public License
+        along with this program; if not, write to the Free Software
+        Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <asm/div64.h>
+
+#include "dvb_frontend.h"
+#include "stv0288.h"
+
+struct stv0288_state {
+        struct i2c_adapter *i2c;
+        const struct stv0288_config *config;
+        struct dvb_frontend frontend;
+
+        u8 initialised:1;
+        u32 tuner_frequency;
+        u32 symbol_rate;
+        fe_code_rate_t fec_inner;
+        int errmode;
+};
+
+#define STATUS_BER 0
+#define STATUS_UCBLOCKS 1
+
+static int debug;
+static int debug_legacy_dish_switch;
+#define dprintk(args...) \
+        do { \
+                if (debug) \
+                        printk(KERN_DEBUG "stv0288: " args); \
+        } while (0)
+
+
+static int stv0288_writeregI(struct stv0288_state *state, u8 reg, u8 data)
+{
+        int ret;
+        u8 buf[] = { reg, data };
+        struct i2c_msg msg = {
+                .addr = state->config->demod_address,
+                .flags = 0,
+                .buf = buf,
+                .len = 2
+        };
+
+        ret = i2c_transfer(state->i2c, &msg, 1);
+
+        if (ret != 1)
+                dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
+                        "ret == %i)\n", __func__, reg, data, ret);
+
+        return (ret != 1) ? -EREMOTEIO : 0;
+}
+
+static int stv0288_write(struct dvb_frontend *fe, u8 *buf, int len)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        if (len != 2)
+                return -EINVAL;
+
+        return stv0288_writeregI(state, buf[0], buf[1]);
+}
+
+static u8 stv0288_readreg(struct stv0288_state *state, u8 reg)
+{
+        int ret;
+        u8 b0[] = { reg };
+        u8 b1[] = { 0 };
+        struct i2c_msg msg[] = {
+                {
+                        .addr = state->config->demod_address,
+                        .flags = 0,
+                        .buf = b0,
+                        .len = 1
+                }, {
+                        .addr = state->config->demod_address,
+                        .flags = I2C_M_RD,
+                        .buf = b1,
+                        .len = 1
+                }
+        };
+
+        ret = i2c_transfer(state->i2c, msg, 2);
+
+        if (ret != 2)
+                dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
+                                __func__, reg, ret);
+
+        return b1[0];
+}
+
+static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+        unsigned int temp;
+        unsigned char b[3];
+
+        if ((srate < 1000000) || (srate > 45000000))
+                return -EINVAL;
+
+        temp = (unsigned int)srate / 1000;
+
+                temp = temp * 32768;
+                temp = temp / 25;
+                temp = temp / 125;
+                b[0] = (unsigned char)((temp >> 12) & 0xff);
+                b[1] = (unsigned char)((temp >> 4) & 0xff);
+                b[2] = (unsigned char)((temp << 4) & 0xf0);
+                stv0288_writeregI(state, 0x28, 0x80); /* SFRH */
+                stv0288_writeregI(state, 0x29, 0); /* SFRM */
+                stv0288_writeregI(state, 0x2a, 0); /* SFRL */
+
+                stv0288_writeregI(state, 0x28, b[0]);
+                stv0288_writeregI(state, 0x29, b[1]);
+                stv0288_writeregI(state, 0x2a, b[2]);
+                dprintk("stv0288: stv0288_set_symbolrate\n");
+
+        return 0;
+}
+
+static int stv0288_send_diseqc_msg(struct dvb_frontend *fe,
+                                    struct dvb_diseqc_master_cmd *m)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        int i;
+
+        dprintk("%s\n", __func__);
+
+        stv0288_writeregI(state, 0x09, 0);
+        msleep(30);
+        stv0288_writeregI(state, 0x05, 0x16);
+
+        for (i = 0; i < m->msg_len; i++) {
+                if (stv0288_writeregI(state, 0x06, m->msg[i]))
+                        return -EREMOTEIO;
+                msleep(12);
+        }
+
+        return 0;
+}
+
+static int stv0288_send_diseqc_burst(struct dvb_frontend *fe,
+                                                fe_sec_mini_cmd_t burst)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        dprintk("%s\n", __func__);
+
+        if (stv0288_writeregI(state, 0x05, 0x16))/* burst mode */
+                return -EREMOTEIO;
+
+        if (stv0288_writeregI(state, 0x06, burst == SEC_MINI_A ? 0x00 : 0xff))
+                return -EREMOTEIO;
+
+        if (stv0288_writeregI(state, 0x06, 0x12))
+                return -EREMOTEIO;
+
+        return 0;
+}
+
+static int stv0288_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        switch (tone) {
+        case SEC_TONE_ON:
+                if (stv0288_writeregI(state, 0x05, 0x10))/* burst mode */
+                        return -EREMOTEIO;
+                return stv0288_writeregI(state, 0x06, 0xff);
+
+        case SEC_TONE_OFF:
+                if (stv0288_writeregI(state, 0x05, 0x13))/* burst mode */
+                        return -EREMOTEIO;
+                return stv0288_writeregI(state, 0x06, 0x00);
+
+        default:
+                return -EINVAL;
+        }
+}
+
+static u8 stv0288_inittab[] = {
+        0x01, 0x15,
+        0x02, 0x20,
+        0x09, 0x0,
+        0x0a, 0x4,
+        0x0b, 0x0,
+        0x0c, 0x0,
+        0x0d, 0x0,
+        0x0e, 0xd4,
+        0x0f, 0x30,
+        0x11, 0x80,
+        0x12, 0x03,
+        0x13, 0x48,
+        0x14, 0x84,
+        0x15, 0x45,
+        0x16, 0xb7,
+        0x17, 0x9c,
+        0x18, 0x0,
+        0x19, 0xa6,
+        0x1a, 0x88,
+        0x1b, 0x8f,
+        0x1c, 0xf0,
+        0x20, 0x0b,
+        0x21, 0x54,
+        0x22, 0x0,
+        0x23, 0x0,
+        0x2b, 0xff,
+        0x2c, 0xf7,
+        0x30, 0x0,
+        0x31, 0x1e,
+        0x32, 0x14,
+        0x33, 0x0f,
+        0x34, 0x09,
+        0x35, 0x0c,
+        0x36, 0x05,
+        0x37, 0x2f,
+        0x38, 0x16,
+        0x39, 0xbe,
+        0x3a, 0x0,
+        0x3b, 0x13,
+        0x3c, 0x11,
+        0x3d, 0x30,
+        0x40, 0x63,
+        0x41, 0x04,
+        0x42, 0x60,
+        0x43, 0x00,
+        0x44, 0x00,
+        0x45, 0x00,
+        0x46, 0x00,
+        0x47, 0x00,
+        0x4a, 0x00,
+        0x50, 0x10,
+        0x51, 0x38,
+        0x52, 0x21,
+        0x58, 0x54,
+        0x59, 0x86,
+        0x5a, 0x0,
+        0x5b, 0x9b,
+        0x5c, 0x08,
+        0x5d, 0x7f,
+        0x5e, 0x0,
+        0x5f, 0xff,
+        0x70, 0x0,
+        0x71, 0x0,
+        0x72, 0x0,
+        0x74, 0x0,
+        0x75, 0x0,
+        0x76, 0x0,
+        0x81, 0x0,
+        0x82, 0x3f,
+        0x83, 0x3f,
+        0x84, 0x0,
+        0x85, 0x0,
+        0x88, 0x0,
+        0x89, 0x0,
+        0x8a, 0x0,
+        0x8b, 0x0,
+        0x8c, 0x0,
+        0x90, 0x0,
+        0x91, 0x0,
+        0x92, 0x0,
+        0x93, 0x0,
+        0x94, 0x1c,
+        0x97, 0x0,
+        0xa0, 0x48,
+        0xa1, 0x0,
+        0xb0, 0xb8,
+        0xb1, 0x3a,
+        0xb2, 0x10,
+        0xb3, 0x82,
+        0xb4, 0x80,
+        0xb5, 0x82,
+        0xb6, 0x82,
+        0xb7, 0x82,
+        0xb8, 0x20,
+        0xb9, 0x0,
+        0xf0, 0x0,
+        0xf1, 0x0,
+        0xf2, 0xc0,
+        0x51, 0x36,
+        0x52, 0x09,
+        0x53, 0x94,
+        0x54, 0x62,
+        0x55, 0x29,
+        0x56, 0x64,
+        0x57, 0x2b,
+        0xff, 0xff,
+};
+
+static int stv0288_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t volt)
+{
+        dprintk("%s: %s\n", __func__,
+                volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
+                volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
+
+        return 0;
+}
+
+static int stv0288_init(struct dvb_frontend *fe)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+        int i;
+
+        dprintk("stv0288: init chip\n");
+        stv0288_writeregI(state, 0x41, 0x04);
+        msleep(50);
+
+        for (i = 0; !(stv0288_inittab[i] == 0xff &&
+                                stv0288_inittab[i + 1] == 0xff); i += 2)
+                stv0288_writeregI(state, stv0288_inittab[i],
+                                                stv0288_inittab[i + 1]);
+
+        return 0;
+}
+
+static int stv0288_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        u8 sync = stv0288_readreg(state, 0x24);
+        if (sync == 255)
+                sync = 0;
+
+        dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
+
+        *status = 0;
+
+        if ((sync & 0x08) == 0x08) {
+                *status |= FE_HAS_LOCK;
+                dprintk("stv0288 has locked\n");
+        }
+
+        return 0;
+}
+
+static int stv0288_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        if (state->errmode != STATUS_BER)
+                return 0;
+        *ber = (stv0288_readreg(state, 0x26) << 8) |
+                                        stv0288_readreg(state, 0x27);
+        dprintk("stv0288_read_ber %d\n", *ber);
+
+        return 0;
+}
+
+
+static int stv0288_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        s32 signal =  0xffff - ((stv0288_readreg(state, 0x10) << 8));
+
+
+        signal = signal * 5 / 4;
+        *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
+        dprintk("stv0288_read_signal_strength %d\n", *strength);
+
+        return 0;
+}
+static int stv0288_sleep(struct dvb_frontend *fe)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        stv0288_writeregI(state, 0x41, 0x84);
+        state->initialised = 0;
+
+        return 0;
+}
+static int stv0288_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        s32 xsnr = 0xffff - ((stv0288_readreg(state, 0x2d) << 8)
+                           | stv0288_readreg(state, 0x2e));
+        xsnr = 3 * (xsnr - 0xa100);
+        *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
+        dprintk("stv0288_read_snr %d\n", *snr);
+
+        return 0;
+}
+
+static int stv0288_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        if (state->errmode != STATUS_BER)
+                return 0;
+        *ucblocks = (stv0288_readreg(state, 0x26) << 8) |
+                                        stv0288_readreg(state, 0x27);
+        dprintk("stv0288_read_ber %d\n", *ucblocks);
+
+        return 0;
+}
+
+static int stv0288_set_property(struct dvb_frontend *fe, struct dtv_property *p)
+{
+        dprintk("%s(..)\n", __func__);
+        return 0;
+}
+
+static int stv0288_get_property(struct dvb_frontend *fe, struct dtv_property *p)
+{
+        dprintk("%s(..)\n", __func__);
+        return 0;
+}
+
+static int stv0288_set_frontend(struct dvb_frontend *fe,
+                                        struct dvb_frontend_parameters *dfp)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+        char tm;
+        unsigned char tda[3];
+
+        dprintk("%s : FE_SET_FRONTEND\n", __func__);
+
+        if (c->delivery_system != SYS_DVBS) {
+                        dprintk("%s: unsupported delivery "
+                                "system selected (%d)\n",
+                                __func__, c->delivery_system);
+                        return -EOPNOTSUPP;
+        }
+
+        if (state->config->set_ts_params)
+                state->config->set_ts_params(fe, 0);
+
+        /* only frequency & symbol_rate are used for tuner*/
+        dfp->frequency = c->frequency;
+        dfp->u.qpsk.symbol_rate = c->symbol_rate;
+        if (fe->ops.tuner_ops.set_params) {
+                fe->ops.tuner_ops.set_params(fe, dfp);
+                if (fe->ops.i2c_gate_ctrl)
+                        fe->ops.i2c_gate_ctrl(fe, 0);
+        }
+
+        udelay(10);
+        stv0288_set_symbolrate(fe, c->symbol_rate);
+        /* Carrier lock control register */
+        stv0288_writeregI(state, 0x15, 0xc5);
+
+        tda[0] = 0x2b; /* CFRM */
+        tda[2] = 0x0; /* CFRL */
+        for (tm = -6; tm < 7;) {
+                /* Viterbi status */
+                if (stv0288_readreg(state, 0x24) & 0x80)
+                        break;
+
+                tda[2] += 40;
+                if (tda[2] < 40)
+                        tm++;
+                tda[1] = (unsigned char)tm;
+                stv0288_writeregI(state, 0x2b, tda[1]);
+                stv0288_writeregI(state, 0x2c, tda[2]);
+                udelay(30);
+        }
+
+        state->tuner_frequency = c->frequency;
+        state->fec_inner = FEC_AUTO;
+        state->symbol_rate = c->symbol_rate;
+
+        return 0;
+}
+
+static int stv0288_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+
+        if (enable)
+                stv0288_writeregI(state, 0x01, 0xb5);
+        else
+                stv0288_writeregI(state, 0x01, 0x35);
+
+        udelay(1);
+
+        return 0;
+}
+
+static void stv0288_release(struct dvb_frontend *fe)
+{
+        struct stv0288_state *state = fe->demodulator_priv;
+        kfree(state);
+}
+
+static struct dvb_frontend_ops stv0288_ops = {
+
+        .info = {
+                .name                   = "ST STV0288 DVB-S",
+                .type                   = FE_QPSK,
+                .frequency_min          = 950000,
+                .frequency_max          = 2150000,
+                .frequency_stepsize     = 1000,  /* kHz for QPSK frontends */
+                .frequency_tolerance    = 0,
+                .symbol_rate_min        = 1000000,
+                .symbol_rate_max        = 45000000,
+                .symbol_rate_tolerance  = 500,  /* ppm */
+                .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+                      FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
+                      FE_CAN_QPSK |
+                      FE_CAN_FEC_AUTO
+        },
+
+        .release = stv0288_release,
+        .init = stv0288_init,
+        .sleep = stv0288_sleep,
+        .write = stv0288_write,
+        .i2c_gate_ctrl = stv0288_i2c_gate_ctrl,
+        .read_status = stv0288_read_status,
+        .read_ber = stv0288_read_ber,
+        .read_signal_strength = stv0288_read_signal_strength,
+        .read_snr = stv0288_read_snr,
+        .read_ucblocks = stv0288_read_ucblocks,
+        .diseqc_send_master_cmd = stv0288_send_diseqc_msg,
+        .diseqc_send_burst = stv0288_send_diseqc_burst,
+        .set_tone = stv0288_set_tone,
+        .set_voltage = stv0288_set_voltage,
+
+        .set_property = stv0288_set_property,
+        .get_property = stv0288_get_property,
+        .set_frontend = stv0288_set_frontend,
+};
+
+struct dvb_frontend *stv0288_attach(const struct stv0288_config *config,
+                                    struct i2c_adapter *i2c)
+{
+        struct stv0288_state *state = NULL;
+        int id;
+
+        /* allocate memory for the internal state */
+        state = kmalloc(sizeof(struct stv0288_state), GFP_KERNEL);
+        if (state == NULL)
+                goto error;
+
+        /* setup the state */
+        state->config = config;
+        state->i2c = i2c;
+        state->initialised = 0;
+        state->tuner_frequency = 0;
+        state->symbol_rate = 0;
+        state->fec_inner = 0;
+        state->errmode = STATUS_BER;
+
+        stv0288_writeregI(state, 0x41, 0x04);
+        msleep(200);
+        id = stv0288_readreg(state, 0x00);
+        dprintk("stv0288 id %x\n", id);
+
+        /* register 0x00 contains 0x11 for STV0288  */
+        if (id != 0x11)
+                goto error;
+
+        /* create dvb_frontend */
+        memcpy(&state->frontend.ops, &stv0288_ops,
+                        sizeof(struct dvb_frontend_ops));
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+
+        return NULL;
+}
+EXPORT_SYMBOL(stv0288_attach);
+
+module_param(debug_legacy_dish_switch, int, 0444);
+MODULE_PARM_DESC(debug_legacy_dish_switch,
+                "Enable timing analysis for Dish Network legacy switches");
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("ST STV0288 DVB Demodulator driver");
+MODULE_AUTHOR("Georg Acher, Bob Liu, Igor liplianin");
+MODULE_LICENSE("GPL");
+