[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, 196 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/vp7045-fe.c b/drivers/media/dvb/dvb-usb/vp7045-fe.c
new file mode 100644
index 000000000000..2746edfeccba
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/vp7045-fe.c
@@ -0,0 +1,196 @@
+/* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0
+ * DVB-T receiver.
+ *
+ * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
+ *
+ * Thanks to Twinhan who kindly provided hardware and information.
+ *
+ *      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 "vp7045.h"
+
+/* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT
+ *
+ * Programming is hidden inside the firmware, so set_frontend is very easy.
+ * Even though there is a Firmware command that one can use to access the demod
+ * via its registers. This is used for status information.
+ */
+
+struct vp7045_fe_state {
+        struct dvb_frontend fe;
+        struct dvb_usb_device *d;
+};
+
+
+static int vp7045_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
+{
+        struct vp7045_fe_state *state = fe->demodulator_priv;
+        u8 s0 = vp7045_read_reg(state->d,0x00),
+           s1 = vp7045_read_reg(state->d,0x01),
+           s3 = vp7045_read_reg(state->d,0x03);
+
+        *status = 0;
+        if (s0 & (1 << 4))
+                *status |= FE_HAS_CARRIER;
+        if (s0 & (1 << 1))
+                *status |= FE_HAS_VITERBI;
+        if (s0 & (1 << 5))
+                *status |= FE_HAS_LOCK;
+        if (s1 & (1 << 1))
+                *status |= FE_HAS_SYNC;
+        if (s3 & (1 << 6))
+                *status |= FE_HAS_SIGNAL;
+
+        if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
+                        (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
+                *status &= ~FE_HAS_LOCK;
+
+        return 0;
+}
+
+static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
+{
+        struct vp7045_fe_state *state = fe->demodulator_priv;
+        *ber = (vp7045_read_reg(state->d, 0x0D) << 16) |
+               (vp7045_read_reg(state->d, 0x0E) << 8) |
+                vp7045_read_reg(state->d, 0x0F);
+        return 0;
+}
+
+static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
+{
+        struct vp7045_fe_state *state = fe->demodulator_priv;
+        *unc = (vp7045_read_reg(state->d, 0x10) << 8) |
+                    vp7045_read_reg(state->d, 0x11);
+        return 0;
+}
+
+static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
+{
+        struct vp7045_fe_state *state = fe->demodulator_priv;
+        u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) |
+                vp7045_read_reg(state->d, 0x15);
+
+        *strength = ~signal;
+        return 0;
+}
+
+static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
+{
+        struct vp7045_fe_state *state = fe->demodulator_priv;
+        u8 _snr = vp7045_read_reg(state->d, 0x09);
+        *snr = (_snr << 8) | _snr;
+        return 0;
+}
+
+static int vp7045_fe_init(struct dvb_frontend* fe)
+{
+        return 0;
+}
+
+static int vp7045_fe_sleep(struct dvb_frontend* fe)
+{
+        return 0;
+}
+
+static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
+{
+        tune->min_delay_ms = 800;
+        return 0;
+}
+
+static int vp7045_fe_set_frontend(struct dvb_frontend* fe,
+                                  struct dvb_frontend_parameters *fep)
+{
+        struct vp7045_fe_state *state = fe->demodulator_priv;
+        u8 buf[5];
+        u32 freq = fep->frequency / 1000;
+
+        buf[0] = (freq >> 16) & 0xff;
+        buf[1] = (freq >>  8) & 0xff;
+        buf[2] =  freq        & 0xff;
+        buf[3] = 0;
+
+        switch (fep->u.ofdm.bandwidth) {
+                case BANDWIDTH_8_MHZ: buf[4] = 8; break;
+                case BANDWIDTH_7_MHZ: buf[4] = 7; break;
+                case BANDWIDTH_6_MHZ: buf[4] = 6; break;
+                case BANDWIDTH_AUTO: return -EOPNOTSUPP;
+                default:
+                        return -EINVAL;
+        }
+
+        vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200);
+        return 0;
+}
+
+static int vp7045_fe_get_frontend(struct dvb_frontend* fe,
+                                  struct dvb_frontend_parameters *fep)
+{
+        return 0;
+}
+
+static void vp7045_fe_release(struct dvb_frontend* fe)
+{
+        struct vp7045_fe_state *state = fe->demodulator_priv;
+        kfree(state);
+}
+
+static struct dvb_frontend_ops vp7045_fe_ops;
+
+struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d)
+{
+        struct vp7045_fe_state *s = kmalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL);
+        if (s == NULL)
+                goto error;
+        memset(s,0,sizeof(struct vp7045_fe_state));
+
+        s->d = d;
+        s->fe.ops = &vp7045_fe_ops;
+        s->fe.demodulator_priv = s;
+
+        goto success;
+error:
+        return NULL;
+success:
+        return &s->fe;
+}
+
+
+static struct dvb_frontend_ops vp7045_fe_ops = {
+        .info = {
+                .name                   = "Twinhan VP7045/46 USB DVB-T",
+                .type                   = FE_OFDM,
+                .frequency_min          = 44250000,
+                .frequency_max          = 867250000,
+                .frequency_stepsize     = 1000,
+                .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 = vp7045_fe_release,
+
+        .init = vp7045_fe_init,
+        .sleep = vp7045_fe_sleep,
+
+        .set_frontend = vp7045_fe_set_frontend,
+        .get_frontend = vp7045_fe_get_frontend,
+        .get_tune_settings = vp7045_fe_get_tune_settings,
+
+        .read_status = vp7045_fe_read_status,
+        .read_ber = vp7045_fe_read_ber,
+        .read_signal_strength = vp7045_fe_read_signal_strength,
+        .read_snr = vp7045_fe_read_snr,
+        .read_ucblocks = vp7045_fe_read_unc_blocks,
+};