[PATCH] dvb: Add generalized dvb-usb driver

Add generalized dvb-usb driver which supports a wide variety of devices.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 206 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/dtt200u-fe.c b/drivers/media/dvb/dvb-usb/dtt200u-fe.c
new file mode 100644
index 000000000000..d17d768038c6
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dtt200u-fe.c
@@ -0,0 +1,206 @@
+/* Frontend part of the Linux driver for the Yakumo/Hama/Typhoon DVB-T
+ * USB2.0 receiver.
+ *
+ * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.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, version 2.
+ *
+ * see Documentation/dvb/README.dvb-usb for more information
+ */
+#include "dtt200u.h"
+
+struct dtt200u_fe_state {
+        struct dvb_usb_device *d;
+
+        struct dvb_frontend_parameters fep;
+        struct dvb_frontend frontend;
+};
+
+#define moan(which,what) info("unexpected value in '%s' for cmd '%02x' - please report to linux-dvb@linuxtv.org",which,what)
+
+static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        u8 bw = GET_TUNE_STAT;
+        u8 br[3] = { 0 };
+//      u8 bdeb[5] = { 0 };
+
+        dvb_usb_generic_rw(state->d,&bw,1,br,3,0);
+        switch (br[0]) {
+                case 0x01:
+                        *stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+                        break;
+                case 0x00:
+                        *stat = 0;
+                        break;
+                default:
+                        moan("br[0]",GET_TUNE_STAT);
+                        break;
+        }
+
+//      bw[0] = 0x88;
+//      dvb_usb_generic_rw(state->d,bw,1,bdeb,5,0);
+
+//      deb_info("%02x: %02x %02x %02x %02x %02x\n",bw[0],bdeb[0],bdeb[1],bdeb[2],bdeb[3],bdeb[4]);
+
+        return 0;
+}
+static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        u8 bw = GET_BER;
+        *ber = 0;
+        dvb_usb_generic_rw(state->d,&bw,1,(u8*) ber,3,0);
+        return 0;
+}
+
+static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        u8 bw = GET_UNK;
+        *unc = 0;
+        dvb_usb_generic_rw(state->d,&bw,1,(u8*) unc,3,0);
+        return 0;
+}
+
+static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        u8 bw = GET_SIG_STRENGTH, b;
+        dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
+        *strength = (b << 8) | b;
+        return 0;
+}
+
+static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        u8 bw = GET_SNR,br;
+        dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
+        *snr = ~((br << 8) | br);
+        return 0;
+}
+
+static int dtt200u_fe_init(struct dvb_frontend* fe)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        u8 b = RESET_DEMOD;
+        return dvb_usb_generic_write(state->d,&b,1);
+}
+
+static int dtt200u_fe_sleep(struct dvb_frontend* fe)
+{
+        return dtt200u_fe_init(fe);
+}
+
+static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
+{
+        tune->min_delay_ms = 1500;
+        tune->step_size = 166667;
+        tune->max_drift = 166667 * 2;
+        return 0;
+}
+
+static int dtt200u_fe_set_frontend(struct dvb_frontend* fe,
+                                  struct dvb_frontend_parameters *fep)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        u16 freq = fep->frequency / 250000;
+        u8 bw,bwbuf[2] = { SET_BANDWIDTH, 0 }, freqbuf[3] = { SET_FREQUENCY, 0, 0 };
+
+        switch (fep->u.ofdm.bandwidth) {
+                case BANDWIDTH_8_MHZ: bw = 8; break;
+                case BANDWIDTH_7_MHZ: bw = 7; break;
+                case BANDWIDTH_6_MHZ: bw = 6; break;
+                case BANDWIDTH_AUTO: return -EOPNOTSUPP;
+                default:
+                        return -EINVAL;
+        }
+        deb_info("set_frontend\n");
+
+        bwbuf[1] = bw;
+        dvb_usb_generic_write(state->d,bwbuf,2);
+
+        freqbuf[1] = freq & 0xff;
+        freqbuf[2] = (freq >> 8) & 0xff;
+        dvb_usb_generic_write(state->d,freqbuf,3);
+
+        memcpy(&state->fep,fep,sizeof(struct dvb_frontend_parameters));
+
+        return 0;
+}
+
+static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
+                                  struct dvb_frontend_parameters *fep)
+{
+        struct dtt200u_fe_state *state = fe->demodulator_priv;
+        memcpy(fep,&state->fep,sizeof(struct dvb_frontend_parameters));
+        return 0;
+}
+
+static void dtt200u_fe_release(struct dvb_frontend* fe)
+{
+        struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
+        kfree(state);
+}
+
+static struct dvb_frontend_ops dtt200u_fe_ops;
+
+struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
+{
+        struct dtt200u_fe_state* state = NULL;
+
+        /* allocate memory for the internal state */
+        state = (struct dtt200u_fe_state*) kmalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
+        if (state == NULL)
+                goto error;
+        memset(state,0,sizeof(struct dtt200u_fe_state));
+
+        deb_info("attaching frontend dtt200u\n");
+
+        state->d = d;
+
+        state->frontend.ops = &dtt200u_fe_ops;
+        state->frontend.demodulator_priv = state;
+
+        goto success;
+error:
+        return NULL;
+success:
+        return &state->frontend;
+}
+
+static struct dvb_frontend_ops dtt200u_fe_ops = {
+        .info = {
+                .name                   = "DTT200U (Yakumo/Typhoon/Hama) DVB-T",
+                .type                   = FE_OFDM,
+                .frequency_min          = 44250000,
+                .frequency_max          = 867250000,
+                .frequency_stepsize     = 250000,
+                .caps = FE_CAN_INVERSION_AUTO |
+                                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_FEC_AUTO |
+                                FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+                                FE_CAN_TRANSMISSION_MODE_AUTO |
+                                FE_CAN_GUARD_INTERVAL_AUTO |
+                                FE_CAN_RECOVER |
+                                FE_CAN_HIERARCHY_AUTO,
+        },
+
+        .release = dtt200u_fe_release,
+
+        .init = dtt200u_fe_init,
+        .sleep = dtt200u_fe_sleep,
+
+        .set_frontend = dtt200u_fe_set_frontend,
+        .get_frontend = dtt200u_fe_get_frontend,
+        .get_tune_settings = dtt200u_fe_get_tune_settings,
+
+        .read_status = dtt200u_fe_read_status,
+        .read_ber = dtt200u_fe_read_ber,
+        .read_signal_strength = dtt200u_fe_read_signal_strength,
+        .read_snr = dtt200u_fe_read_snr,
+        .read_ucblocks = dtt200u_fe_read_unc_blocks,
+};