1 files changed, 456 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/tda8083.c b/drivers/media/dvb/frontends/tda8083.c
new file mode 100644
index 000000000000..da82e90d6d13
--- /dev/null
+++ b/drivers/media/dvb/frontends/tda8083.c
@@ -0,0 +1,456 @@
+/*
+    Driver for Philips TDA8083 based QPSK Demodulator
+
+    Copyright (C) 2001 Convergence Integrated Media GmbH
+
+    written by Ralph Metzler <ralph@convergence.de>
+
+    adoption to the new DVB frontend API and diagnostic ioctl's
+    by Holger Waechtler <holger@convergence.de>
+
+    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/moduleparam.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include "dvb_frontend.h"
+#include "tda8083.h"
+
+
+struct tda8083_state {
+        struct i2c_adapter* i2c;
+        struct dvb_frontend_ops ops;
+        /* configuration settings */
+        const struct tda8083_config* config;
+        struct dvb_frontend frontend;
+};
+
+static int debug;
+#define dprintk(args...) \
+        do { \
+                if (debug) printk(KERN_DEBUG "tda8083: " args); \
+        } while (0)
+
+
+static u8 tda8083_init_tab [] = {
+        0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
+        0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
+        0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
+        0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
+        0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00
+};
+
+
+static int tda8083_writereg (struct tda8083_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 %02x, ret == %i)\n",
+                        __FUNCTION__, reg, ret);
+
+        return (ret != 1) ? -1 : 0;
+}
+
+static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
+{
+        int ret;
+        struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
+                           { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
+
+        ret = i2c_transfer(state->i2c, msg, 2);
+
+        if (ret != 2)
+                dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
+                        __FUNCTION__, reg1, ret);
+
+        return ret == 2 ? 0 : -1;
+}
+
+static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
+{
+        u8 val;
+
+        tda8083_readregs (state, reg, &val, 1);
+
+        return val;
+}
+
+static int tda8083_set_inversion (struct tda8083_state* state, fe_spectral_inversion_t inversion)
+{
+        /*  XXX FIXME: implement other modes than FEC_AUTO */
+        if (inversion == INVERSION_AUTO)
+                return 0;
+
+        return -EINVAL;
+}
+
+static int tda8083_set_fec (struct tda8083_state* state, fe_code_rate_t fec)
+{
+        if (fec == FEC_AUTO)
+                return tda8083_writereg (state, 0x07, 0xff);
+
+        if (fec >= FEC_1_2 && fec <= FEC_8_9)
+                return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
+
+        return -EINVAL;
+}
+
+static fe_code_rate_t tda8083_get_fec (struct tda8083_state* state)
+{
+        u8 index;
+        static fe_code_rate_t fec_tab [] = { FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
+                                       FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 };
+
+        index = tda8083_readreg(state, 0x0e) & 0x07;
+
+        return fec_tab [index];
+}
+
+static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
+{
+        u32 ratio;
+        u32 tmp;
+        u8 filter;
+
+        if (srate > 32000000)
+                srate = 32000000;
+        if (srate < 500000)
+                srate = 500000;
+
+        filter = 0;
+        if (srate < 24000000)
+                filter = 2;
+        if (srate < 16000000)
+                filter = 3;
+
+        tmp = 31250 << 16;
+        ratio = tmp / srate;
+
+        tmp = (tmp % srate) << 8;
+        ratio = (ratio << 8) + tmp / srate;
+
+        tmp = (tmp % srate) << 8;
+        ratio = (ratio << 8) + tmp / srate;
+
+        dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
+
+        tda8083_writereg (state, 0x05, filter);
+        tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
+        tda8083_writereg (state, 0x03, (ratio >>  8) & 0xff);
+        tda8083_writereg (state, 0x04, (ratio      ) & 0xff);
+
+        tda8083_writereg (state, 0x00, 0x3c);
+        tda8083_writereg (state, 0x00, 0x04);
+
+        return 1;
+}
+
+static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
+{
+        unsigned long start = jiffies;
+
+        while (jiffies - start < timeout &&
+               !(tda8083_readreg(state, 0x02) & 0x80))
+        {
+                msleep(50);
+        };
+}
+
+static int tda8083_set_tone (struct tda8083_state* state, fe_sec_tone_mode_t tone)
+{
+        tda8083_writereg (state, 0x26, 0xf1);
+
+        switch (tone) {
+        case SEC_TONE_OFF:
+                return tda8083_writereg (state, 0x29, 0x00);
+        case SEC_TONE_ON:
+                return tda8083_writereg (state, 0x29, 0x80);
+        default:
+                return -EINVAL;
+        };
+}
+
+static int tda8083_set_voltage (struct tda8083_state* state, fe_sec_voltage_t voltage)
+{
+        switch (voltage) {
+        case SEC_VOLTAGE_13:
+                return tda8083_writereg (state, 0x20, 0x00);
+        case SEC_VOLTAGE_18:
+                return tda8083_writereg (state, 0x20, 0x11);
+        default:
+                return -EINVAL;
+        };
+}
+
+static int tda8083_send_diseqc_burst (struct tda8083_state* state, fe_sec_mini_cmd_t burst)
+{
+        switch (burst) {
+        case SEC_MINI_A:
+                tda8083_writereg (state, 0x29, (5 << 2));  /* send burst A */
+                break;
+        case SEC_MINI_B:
+                tda8083_writereg (state, 0x29, (7 << 2));  /* send B */
+                break;
+        default:
+                return -EINVAL;
+        };
+
+        tda8083_wait_diseqc_fifo (state, 100);
+
+        return 0;
+}
+
+static int tda8083_send_diseqc_msg (struct dvb_frontend* fe,
+                                    struct dvb_diseqc_master_cmd *m)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+        int i;
+
+        tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
+
+        for (i=0; i<m->msg_len; i++)
+                tda8083_writereg (state, 0x23 + i, m->msg[i]);
+
+        tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
+
+        tda8083_wait_diseqc_fifo (state, 100);
+
+        return 0;
+}
+
+static int tda8083_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        u8 signal = ~tda8083_readreg (state, 0x01);
+        u8 sync = tda8083_readreg (state, 0x02);
+
+        *status = 0;
+
+        if (signal > 10)
+                *status |= FE_HAS_SIGNAL;
+
+        if (sync & 0x01)
+                *status |= FE_HAS_CARRIER;
+
+        if (sync & 0x02)
+                *status |= FE_HAS_VITERBI;
+
+        if (sync & 0x10)
+                *status |= FE_HAS_SYNC;
+
+        if ((sync & 0x1f) == 0x1f)
+                *status |= FE_HAS_LOCK;
+
+        return 0;
+}
+
+static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        u8 signal = ~tda8083_readreg (state, 0x01);
+        *strength = (signal << 8) | signal;
+
+        return 0;
+}
+
+static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        u8 _snr = tda8083_readreg (state, 0x08);
+        *snr = (_snr << 8) | _snr;
+
+        return 0;
+}
+
+static int tda8083_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        state->config->pll_set(fe, p);
+        tda8083_set_inversion (state, p->inversion);
+        tda8083_set_fec (state, p->u.qpsk.fec_inner);
+        tda8083_set_symbolrate (state, p->u.qpsk.symbol_rate);
+
+        tda8083_writereg (state, 0x00, 0x3c);
+        tda8083_writereg (state, 0x00, 0x04);
+
+        return 0;
+}
+
+static int tda8083_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        /*  FIXME: get symbolrate & frequency offset...*/
+        /*p->frequency = ???;*/
+        p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
+                        INVERSION_ON : INVERSION_OFF;
+        p->u.qpsk.fec_inner = tda8083_get_fec (state);
+        /*p->u.qpsk.symbol_rate = tda8083_get_symbolrate (state);*/
+
+        return 0;
+}
+
+static int tda8083_sleep(struct dvb_frontend* fe)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        tda8083_writereg (state, 0x00, 0x02);
+        return 0;
+}
+
+static int tda8083_init(struct dvb_frontend* fe)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+        int i;
+
+        for (i=0; i<44; i++)
+                tda8083_writereg (state, i, tda8083_init_tab[i]);
+
+        if (state->config->pll_init) state->config->pll_init(fe);
+
+        tda8083_writereg (state, 0x00, 0x3c);
+        tda8083_writereg (state, 0x00, 0x04);
+
+        return 0;
+}
+
+static int tda8083_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        tda8083_send_diseqc_burst (state, burst);
+        tda8083_writereg (state, 0x00, 0x3c);
+        tda8083_writereg (state, 0x00, 0x04);
+
+        return 0;
+}
+
+static int tda8083_diseqc_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        tda8083_set_tone (state, tone);
+        tda8083_writereg (state, 0x00, 0x3c);
+        tda8083_writereg (state, 0x00, 0x04);
+
+        return 0;
+}
+
+static int tda8083_diseqc_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+
+        tda8083_set_voltage (state, voltage);
+        tda8083_writereg (state, 0x00, 0x3c);
+        tda8083_writereg (state, 0x00, 0x04);
+
+        return 0;
+}
+
+static void tda8083_release(struct dvb_frontend* fe)
+{
+        struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv;
+        kfree(state);
+}
+
+static struct dvb_frontend_ops tda8083_ops;
+
+struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
+                                    struct i2c_adapter* i2c)
+{
+        struct tda8083_state* state = NULL;
+
+        /* allocate memory for the internal state */
+        state = (struct tda8083_state*) kmalloc(sizeof(struct tda8083_state), GFP_KERNEL);
+        if (state == NULL) goto error;
+
+        /* setup the state */
+        state->config = config;
+        state->i2c = i2c;
+        memcpy(&state->ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
+
+        /* check if the demod is there */
+        if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
+
+        /* create dvb_frontend */
+        state->frontend.ops = &state->ops;
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+        return NULL;
+}
+
+static struct dvb_frontend_ops tda8083_ops = {
+
+        .info = {
+                .name                   = "Philips TDA8083 DVB-S",
+                .type                   = FE_QPSK,
+                .frequency_min          = 950000,     /* FIXME: guessed! */
+                .frequency_max          = 1400000,    /* FIXME: guessed! */
+                .frequency_stepsize     = 125,   /* kHz for QPSK frontends */
+        /*      .frequency_tolerance    = ???,*/
+                .symbol_rate_min        = 1000000,   /* FIXME: guessed! */
+                .symbol_rate_max        = 45000000,  /* FIXME: guessed! */
+        /*      .symbol_rate_tolerance  = ???,*/
+                .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_QPSK | FE_CAN_MUTE_TS
+        },
+
+        .release = tda8083_release,
+
+        .init = tda8083_init,
+        .sleep = tda8083_sleep,
+
+        .set_frontend = tda8083_set_frontend,
+        .get_frontend = tda8083_get_frontend,
+
+        .read_status = tda8083_read_status,
+        .read_signal_strength = tda8083_read_signal_strength,
+        .read_snr = tda8083_read_snr,
+
+        .diseqc_send_master_cmd = tda8083_send_diseqc_msg,
+        .diseqc_send_burst = tda8083_diseqc_send_burst,
+        .set_tone = tda8083_diseqc_set_tone,
+        .set_voltage = tda8083_diseqc_set_voltage,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
+MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(tda8083_attach);