Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/media/dvb/frontends/at76c651.c b/drivers/media/dvb/frontends/at76c651.c
new file mode 100644
index 0000000..ce2eaa1
--- /dev/null
+++ b/drivers/media/dvb/frontends/at76c651.c
@@ -0,0 +1,450 @@
+/*
+ * at76c651.c
+ *
+ * Atmel DVB-C Frontend Driver (at76c651/tua6010xs)
+ *
+ * Copyright (C) 2001 fnbrd <fnbrd@gmx.de>
+ * & 2002-2004 Andreas Oberritter <obi@linuxtv.org>
+ * & 2003 Wolfram Joost <dbox2@frokaschwei.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.
+ *
+ * AT76C651
+ * http://www.nalanda.nitc.ac.in/industry/datasheets/atmel/acrobat/doc1293.pdf
+ * http://www.atmel.com/atmel/acrobat/doc1320.pdf
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+#include "dvb_frontend.h"
+#include "at76c651.h"
+
+
+struct at76c651_state {
+
+ struct i2c_adapter* i2c;
+
+ struct dvb_frontend_ops ops;
+
+ const struct at76c651_config* config;
+
+ struct dvb_frontend frontend;
+
+ /* revision of the chip */
+ u8 revision;
+
+ /* last QAM value set */
+ u8 qam;
+};
+
+static int debug;
+#define dprintk(args...) \
+ do { \
+ if (debug) printk(KERN_DEBUG "at76c651: " args); \
+ } while (0)
+
+
+#if ! defined(__powerpc__)
+static __inline__ int __ilog2(unsigned long x)
+{
+ int i;
+
+ if (x == 0)
+ return -1;
+
+ for (i = 0; x != 0; i++)
+ x >>= 1;
+
+ return i - 1;
+}
+#endif
+
+static int at76c651_writereg(struct at76c651_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",
+ __FUNCTION__, reg, data, ret);
+
+ msleep(10);
+
+ return (ret != 1) ? -EREMOTEIO : 0;
+}
+
+static u8 at76c651_readreg(struct at76c651_state* state, u8 reg)
+{
+ int ret;
+ u8 val;
+ struct i2c_msg msg[] = {
+ { .addr = state->config->demod_address, .flags = 0, .buf = ®, .len = 1 },
+ { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = &val, .len = 1 }
+ };
+
+ ret = i2c_transfer(state->i2c, msg, 2);
+
+ if (ret != 2)
+ dprintk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
+
+ return val;
+}
+
+static int at76c651_reset(struct at76c651_state* state)
+{
+ return at76c651_writereg(state, 0x07, 0x01);
+}
+
+static void at76c651_disable_interrupts(struct at76c651_state* state)
+{
+ at76c651_writereg(state, 0x0b, 0x00);
+}
+
+static int at76c651_set_auto_config(struct at76c651_state *state)
+{
+ /*
+ * Autoconfig
+ */
+
+ at76c651_writereg(state, 0x06, 0x01);
+
+ /*
+ * Performance optimizations, should be done after autoconfig
+ */
+
+ at76c651_writereg(state, 0x10, 0x06);
+ at76c651_writereg(state, 0x11, ((state->qam == 5) || (state->qam == 7)) ? 0x12 : 0x10);
+ at76c651_writereg(state, 0x15, 0x28);
+ at76c651_writereg(state, 0x20, 0x09);
+ at76c651_writereg(state, 0x24, ((state->qam == 5) || (state->qam == 7)) ? 0xC0 : 0x90);
+ at76c651_writereg(state, 0x30, 0x90);
+ if (state->qam == 5)
+ at76c651_writereg(state, 0x35, 0x2A);
+
+ /*
+ * Initialize A/D-converter
+ */
+
+ if (state->revision == 0x11) {
+ at76c651_writereg(state, 0x2E, 0x38);
+ at76c651_writereg(state, 0x2F, 0x13);
+ }
+
+ at76c651_disable_interrupts(state);
+
+ /*
+ * Restart operation
+ */
+
+ at76c651_reset(state);
+
+ return 0;
+}
+
+static void at76c651_set_bbfreq(struct at76c651_state* state)
+{
+ at76c651_writereg(state, 0x04, 0x3f);
+ at76c651_writereg(state, 0x05, 0xee);
+}
+
+static int at76c651_set_symbol_rate(struct at76c651_state* state, u32 symbol_rate)
+{
+ u8 exponent;
+ u32 mantissa;
+
+ if (symbol_rate > 9360000)
+ return -EINVAL;
+
+ /*
+ * FREF = 57800 kHz
+ * exponent = 10 + floor (log2(symbol_rate / FREF))
+ * mantissa = (symbol_rate / FREF) * (1 << (30 - exponent))
+ */
+
+ exponent = __ilog2((symbol_rate << 4) / 903125);
+ mantissa = ((symbol_rate / 3125) * (1 << (24 - exponent))) / 289;
+
+ at76c651_writereg(state, 0x00, mantissa >> 13);
+ at76c651_writereg(state, 0x01, mantissa >> 5);
+ at76c651_writereg(state, 0x02, (mantissa << 3) | exponent);
+
+ return 0;
+}
+
+static int at76c651_set_qam(struct at76c651_state *state, fe_modulation_t qam)
+{
+ switch (qam) {
+ case QPSK:
+ state->qam = 0x02;
+ break;
+ case QAM_16:
+ state->qam = 0x04;
+ break;
+ case QAM_32:
+ state->qam = 0x05;
+ break;
+ case QAM_64:
+ state->qam = 0x06;
+ break;
+ case QAM_128:
+ state->qam = 0x07;
+ break;
+ case QAM_256:
+ state->qam = 0x08;
+ break;
+#if 0
+ case QAM_512:
+ state->qam = 0x09;
+ break;
+ case QAM_1024:
+ state->qam = 0x0A;
+ break;
+#endif
+ default:
+ return -EINVAL;
+
+ }
+
+ return at76c651_writereg(state, 0x03, state->qam);
+}
+
+static int at76c651_set_inversion(struct at76c651_state* state, fe_spectral_inversion_t inversion)
+{
+ u8 feciqinv = at76c651_readreg(state, 0x60);
+
+ switch (inversion) {
+ case INVERSION_OFF:
+ feciqinv |= 0x02;
+ feciqinv &= 0xFE;
+ break;
+
+ case INVERSION_ON:
+ feciqinv |= 0x03;
+ break;
+
+ case INVERSION_AUTO:
+ feciqinv &= 0xFC;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return at76c651_writereg(state, 0x60, feciqinv);
+}
+
+static int at76c651_set_parameters(struct dvb_frontend* fe,
+ struct dvb_frontend_parameters *p)
+{
+ int ret;
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+
+ at76c651_writereg(state, 0x0c, 0xc3);
+ state->config->pll_set(fe, p);
+ at76c651_writereg(state, 0x0c, 0xc2);
+
+ if ((ret = at76c651_set_symbol_rate(state, p->u.qam.symbol_rate)))
+ return ret;
+
+ if ((ret = at76c651_set_inversion(state, p->inversion)))
+ return ret;
+
+ return at76c651_set_auto_config(state);
+}
+
+static int at76c651_set_defaults(struct dvb_frontend* fe)
+{
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+
+ at76c651_set_symbol_rate(state, 6900000);
+ at76c651_set_qam(state, QAM_64);
+ at76c651_set_bbfreq(state);
+ at76c651_set_auto_config(state);
+
+ if (state->config->pll_init) {
+ at76c651_writereg(state, 0x0c, 0xc3);
+ state->config->pll_init(fe);
+ at76c651_writereg(state, 0x0c, 0xc2);
+ }
+
+ return 0;
+}
+
+static int at76c651_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+ u8 sync;
+
+ /*
+ * Bits: FEC, CAR, EQU, TIM, AGC2, AGC1, ADC, PLL (PLL=0)
+ */
+ sync = at76c651_readreg(state, 0x80);
+ *status = 0;
+
+ if (sync & (0x04 | 0x10)) /* AGC1 || TIM */
+ *status |= FE_HAS_SIGNAL;
+ if (sync & 0x10) /* TIM */
+ *status |= FE_HAS_CARRIER;
+ if (sync & 0x80) /* FEC */
+ *status |= FE_HAS_VITERBI;
+ if (sync & 0x40) /* CAR */
+ *status |= FE_HAS_SYNC;
+ if ((sync & 0xF0) == 0xF0) /* TIM && EQU && CAR && FEC */
+ *status |= FE_HAS_LOCK;
+
+ return 0;
+}
+
+static int at76c651_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+
+ *ber = (at76c651_readreg(state, 0x81) & 0x0F) << 16;
+ *ber |= at76c651_readreg(state, 0x82) << 8;
+ *ber |= at76c651_readreg(state, 0x83);
+ *ber *= 10;
+
+ return 0;
+}
+
+static int at76c651_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+
+ u8 gain = ~at76c651_readreg(state, 0x91);
+ *strength = (gain << 8) | gain;
+
+ return 0;
+}
+
+static int at76c651_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+
+ *snr = 0xFFFF -
+ ((at76c651_readreg(state, 0x8F) << 8) |
+ at76c651_readreg(state, 0x90));
+
+ return 0;
+}
+
+static int at76c651_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+
+ *ucblocks = at76c651_readreg(state, 0x82);
+
+ return 0;
+}
+
+static int at76c651_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *fesettings)
+{
+ fesettings->min_delay_ms = 50;
+ fesettings->step_size = 0;
+ fesettings->max_drift = 0;
+ return 0;
+}
+
+static void at76c651_release(struct dvb_frontend* fe)
+{
+ struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops at76c651_ops;
+
+struct dvb_frontend* at76c651_attach(const struct at76c651_config* config,
+ struct i2c_adapter* i2c)
+{
+ struct at76c651_state* state = NULL;
+
+ /* allocate memory for the internal state */
+ state = (struct at76c651_state*) kmalloc(sizeof(struct at76c651_state), GFP_KERNEL);
+ if (state == NULL) goto error;
+
+ /* setup the state */
+ state->config = config;
+ state->qam = 0;
+
+ /* check if the demod is there */
+ if (at76c651_readreg(state, 0x0e) != 0x65) goto error;
+
+ /* finalise state setup */
+ state->i2c = i2c;
+ state->revision = at76c651_readreg(state, 0x0f) & 0xfe;
+ memcpy(&state->ops, &at76c651_ops, sizeof(struct dvb_frontend_ops));
+
+ /* 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 at76c651_ops = {
+
+ .info = {
+ .name = "Atmel AT76C651B DVB-C",
+ .type = FE_QAM,
+ .frequency_min = 48250000,
+ .frequency_max = 863250000,
+ .frequency_stepsize = 62500,
+ /*.frequency_tolerance = */ /* FIXME: 12% of SR */
+ .symbol_rate_min = 0, /* FIXME */
+ .symbol_rate_max = 9360000, /* FIXME */
+ .symbol_rate_tolerance = 4000,
+ .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_32 | FE_CAN_QAM_64 | FE_CAN_QAM_128 |
+ FE_CAN_MUTE_TS | FE_CAN_QAM_256 | FE_CAN_RECOVER
+ },
+
+ .release = at76c651_release,
+
+ .init = at76c651_set_defaults,
+
+ .set_frontend = at76c651_set_parameters,
+ .get_tune_settings = at76c651_get_tune_settings,
+
+ .read_status = at76c651_read_status,
+ .read_ber = at76c651_read_ber,
+ .read_signal_strength = at76c651_read_signal_strength,
+ .read_snr = at76c651_read_snr,
+ .read_ucblocks = at76c651_read_ucblocks,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Atmel AT76C651 DVB-C Demodulator Driver");
+MODULE_AUTHOR("Andreas Oberritter <obi@linuxtv.org>");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(at76c651_attach);