/*
* at76c651.c
*
- * Atmel DVB-C Frontend Driver (at76c651/tua6010xs)
+ * Atmel DVB-C Frontend Driver (at76c651/dat7021)
*
* Copyright (C) 2001 fnbrd <fnbrd@gmx.de>
- * & 2002-2004 Andreas Oberritter <obi@linuxtv.org>
+ * & 2002 Andreas Oberritter <obi@linuxtv.org>
* & 2003 Wolfram Joost <dbox2@frokaschwei.de>
*
* This program is free software; you can redistribute it and/or modify
* 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;
+#if defined(__powerpc__)
+#include <asm/bitops.h>
+#endif
- struct dvb_frontend_ops ops;
+#include "dvb_frontend.h"
+#include "dvb_i2c.h"
+#include "dvb_functions.h"
- const struct at76c651_config* config;
+static int debug = 0;
+static u8 at76c651_qam;
+static u8 at76c651_revision;
- struct dvb_frontend frontend;
+#define dprintk if (debug) printk
- /* revision of the chip */
- u8 revision;
+/*
+ * DAT7021
+ * -------
+ * Input Frequency Range (RF): 48.25 MHz to 863.25 MHz
+ * Band Width: 8 MHz
+ * Level Input (Range for Digital Signals): -61 dBm to -41 dBm
+ * Output Frequency (IF): 36 MHz
+ *
+ * (see http://www.atmel.com/atmel/acrobat/doc1320.pdf)
+ */
- /* last QAM value set */
- u8 qam;
+static struct dvb_frontend_info at76c651_info = {
+
+ .name = "Atmel AT76C651(B) with DAT7021",
+ .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,
+ .notifier_delay = 0,
+ .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
};
-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)
{
}
#endif
-static int at76c651_writereg(struct at76c651_state* state, u8 reg, u8 data)
+static int at76c651_writereg(struct dvb_i2c_bus *i2c, 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 };
+ struct i2c_msg msg = { .addr = 0x1a >> 1, .flags = 0, .buf = buf, .len = 2 };
- ret = i2c_transfer(state->i2c, &msg, 1);
+ ret = i2c->xfer(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);
+ dvb_delay(10);
return (ret != 1) ? -EREMOTEIO : 0;
+
}
-static u8 at76c651_readreg(struct at76c651_state* state, u8 reg)
+static u8 at76c651_readreg(struct dvb_i2c_bus *i2c, 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 }
- };
+ u8 b0[] = { reg };
+ u8 b1[] = { 0 };
+ struct i2c_msg msg[] = { {.addr = 0x1a >> 1, .flags = 0, .buf = b0, .len = 1},
+ {.addr = 0x1a >> 1, .flags = I2C_M_RD, .buf = b1, .len = 1} };
- ret = i2c_transfer(state->i2c, msg, 2);
+ ret = i2c->xfer(i2c, msg, 2);
if (ret != 2)
dprintk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
- return val;
+ return b1[0];
+
}
-static int at76c651_reset(struct at76c651_state* state)
+static int at76c651_reset(struct dvb_i2c_bus *i2c)
{
- return at76c651_writereg(state, 0x07, 0x01);
+
+ return at76c651_writereg(i2c, 0x07, 0x01);
+
}
-static void at76c651_disable_interrupts(struct at76c651_state* state)
+static int at76c651_disable_interrupts(struct dvb_i2c_bus *i2c)
{
- at76c651_writereg(state, 0x0b, 0x00);
+
+ return at76c651_writereg(i2c, 0x0b, 0x00);
+
}
-static int at76c651_set_auto_config(struct at76c651_state *state)
+static int at76c651_set_auto_config(struct dvb_i2c_bus *i2c)
{
+
/*
* Autoconfig
*/
- at76c651_writereg(state, 0x06, 0x01);
+ at76c651_writereg(i2c, 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);
+ at76c651_writereg(i2c, 0x10, 0x06);
+ at76c651_writereg(i2c, 0x11, ((at76c651_qam == 5) || (at76c651_qam == 7)) ? 0x12 : 0x10);
+ at76c651_writereg(i2c, 0x15, 0x28);
+ at76c651_writereg(i2c, 0x20, 0x09);
+ at76c651_writereg(i2c, 0x24, ((at76c651_qam == 5) || (at76c651_qam == 7)) ? 0xC0 : 0x90);
+ at76c651_writereg(i2c, 0x30, 0x90);
+ if (at76c651_qam == 5)
+ at76c651_writereg(i2c, 0x35, 0x2A);
/*
* Initialize A/D-converter
*/
- if (state->revision == 0x11) {
- at76c651_writereg(state, 0x2E, 0x38);
- at76c651_writereg(state, 0x2F, 0x13);
+ if (at76c651_revision == 0x11) {
+ at76c651_writereg(i2c, 0x2E, 0x38);
+ at76c651_writereg(i2c, 0x2F, 0x13);
}
- at76c651_disable_interrupts(state);
+ at76c651_disable_interrupts(i2c);
/*
* Restart operation
*/
- at76c651_reset(state);
+ at76c651_reset(i2c);
+
+ return 0;
+
+}
+
+static int at76c651_set_bbfreq(struct dvb_i2c_bus *i2c)
+{
+
+ at76c651_writereg(i2c, 0x04, 0x3f);
+ at76c651_writereg(i2c, 0x05, 0xee);
+
+ return 0;
+
+}
+
+static int at76c651_switch_tuner_i2c(struct dvb_i2c_bus *i2c, u8 enable)
+{
+
+ if (enable)
+ return at76c651_writereg(i2c, 0x0c, 0xc2 | 0x01);
+ else
+ return at76c651_writereg(i2c, 0x0c, 0xc2);
+
+}
+
+static int dat7021_write(struct dvb_i2c_bus *i2c, u32 tw)
+{
+
+ int ret;
+ struct i2c_msg msg =
+ { .addr = 0xc2 >> 1, .flags = 0, .buf = (u8 *) & tw, .len = sizeof (tw) };
+
+#ifdef __LITTLE_ENDIAN
+ tw = __cpu_to_be32(tw);
+#endif
+
+ at76c651_switch_tuner_i2c(i2c, 1);
+
+ ret = i2c->xfer(i2c, &msg, 1);
+
+ at76c651_switch_tuner_i2c(i2c, 0);
+
+ if (ret != 4)
+ return -EFAULT;
+
+ at76c651_reset(i2c);
return 0;
+
}
-static void at76c651_set_bbfreq(struct at76c651_state* state)
+static int dat7021_set_tv_freq(struct dvb_i2c_bus *i2c, u32 freq)
{
- at76c651_writereg(state, 0x04, 0x3f);
- at76c651_writereg(state, 0x05, 0xee);
+
+ u32 dw;
+
+ freq /= 1000;
+
+ if ((freq < 48250) || (freq > 863250))
+ return -EINVAL;
+
+ /*
+ * formula: dw=0x17e28e06+(freq-346000UL)/8000UL*0x800000
+ * or: dw=0x4E28E06+(freq-42000) / 125 * 0x20000
+ */
+
+ dw = (freq - 42000) * 4096;
+ dw = dw / 125;
+ dw = dw * 32;
+
+ if (freq > 394000)
+ dw += 0x4E28E85;
+ else
+ dw += 0x4E28E06;
+
+ return dat7021_write(i2c, dw);
+
}
-static int at76c651_set_symbol_rate(struct at76c651_state* state, u32 symbol_rate)
+static int at76c651_set_symbolrate(struct dvb_i2c_bus *i2c, u32 symbolrate)
{
+
u8 exponent;
u32 mantissa;
- if (symbol_rate > 9360000)
+ if (symbolrate > 9360000)
return -EINVAL;
/*
* FREF = 57800 kHz
- * exponent = 10 + floor (log2(symbol_rate / FREF))
- * mantissa = (symbol_rate / FREF) * (1 << (30 - exponent))
+ * exponent = 10 + floor ( log2 ( symbolrate / FREF ) )
+ * mantissa = ( symbolrate / FREF) * ( 1 << ( 30 - exponent ) )
*/
- exponent = __ilog2((symbol_rate << 4) / 903125);
- mantissa = ((symbol_rate / 3125) * (1 << (24 - exponent))) / 289;
+ exponent = __ilog2((symbolrate << 4) / 903125);
+ mantissa = ((symbolrate / 3125) * (1 << (24 - exponent))) / 289;
- at76c651_writereg(state, 0x00, mantissa >> 13);
- at76c651_writereg(state, 0x01, mantissa >> 5);
- at76c651_writereg(state, 0x02, (mantissa << 3) | exponent);
+ at76c651_writereg(i2c, 0x00, mantissa >> 13);
+ at76c651_writereg(i2c, 0x01, mantissa >> 5);
+ at76c651_writereg(i2c, 0x02, (mantissa << 3) | exponent);
return 0;
+
}
-static int at76c651_set_qam(struct at76c651_state *state, fe_modulation_t qam)
+static int at76c651_set_qam(struct dvb_i2c_bus *i2c, fe_modulation_t qam)
{
+
switch (qam) {
case QPSK:
- state->qam = 0x02;
+ at76c651_qam = 0x02;
break;
case QAM_16:
- state->qam = 0x04;
+ at76c651_qam = 0x04;
break;
case QAM_32:
- state->qam = 0x05;
+ at76c651_qam = 0x05;
break;
case QAM_64:
- state->qam = 0x06;
+ at76c651_qam = 0x06;
break;
case QAM_128:
- state->qam = 0x07;
+ at76c651_qam = 0x07;
break;
case QAM_256:
- state->qam = 0x08;
+ at76c651_qam = 0x08;
break;
#if 0
case QAM_512:
- state->qam = 0x09;
+ at76c651_qam = 0x09;
break;
case QAM_1024:
- state->qam = 0x0A;
+ at76c651_qam = 0x0A;
break;
#endif
default:
}
- return at76c651_writereg(state, 0x03, state->qam);
+ return at76c651_writereg(i2c, 0x03, at76c651_qam);
+
}
-static int at76c651_set_inversion(struct at76c651_state* state, fe_spectral_inversion_t inversion)
+static int at76c651_set_inversion(struct dvb_i2c_bus *i2c,
+ fe_spectral_inversion_t inversion)
{
- u8 feciqinv = at76c651_readreg(state, 0x60);
+
+ u8 feciqinv = at76c651_readreg(i2c, 0x60);
switch (inversion) {
case INVERSION_OFF:
return -EINVAL;
}
- return at76c651_writereg(state, 0x60, feciqinv);
-}
-
-
-
+ return at76c651_writereg(i2c, 0x60, feciqinv);
+}
+static int at76c651_set_parameters(struct dvb_i2c_bus *i2c,
+ struct dvb_frontend_parameters *p)
+{
+ dat7021_set_tv_freq(i2c, p->frequency);
+ at76c651_set_symbolrate(i2c, p->u.qam.symbol_rate);
+ at76c651_set_inversion(i2c, p->inversion);
+ at76c651_set_auto_config(i2c);
+ at76c651_reset(i2c);
+ return 0;
+}
-static int at76c651_set_parameters(struct dvb_frontend* fe,
- struct dvb_frontend_parameters *p)
+static int at76c651_set_defaults(struct dvb_i2c_bus *i2c)
{
- 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;
+ at76c651_set_symbolrate(i2c, 6900000);
+ at76c651_set_qam(i2c, QAM_64);
+ at76c651_set_bbfreq(i2c);
+ at76c651_set_auto_config(i2c);
- if ((ret = at76c651_set_inversion(state, p->inversion)))
- return ret;
+ return 0;
- return at76c651_set_auto_config(state);
}
-static int at76c651_set_defaults(struct dvb_frontend* fe)
+static int at76c651_ioctl(struct dvb_frontend *fe, unsigned int cmd, void *arg)
{
- 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);
-}
+ switch (cmd) {
- return 0;
-}
+ case FE_GET_INFO:
+ memcpy(arg, &at76c651_info, sizeof (struct dvb_frontend_info));
+ break;
-static int at76c651_read_status(struct dvb_frontend* fe, fe_status_t* status)
+ case FE_READ_STATUS:
{
- struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+
+ fe_status_t *status = (fe_status_t *) arg;
u8 sync;
/*
* Bits: FEC, CAR, EQU, TIM, AGC2, AGC1, ADC, PLL (PLL=0)
*/
- sync = at76c651_readreg(state, 0x80);
+ sync = at76c651_readreg(fe->i2c, 0x80);
+
*status = 0;
if (sync & (0x04 | 0x10)) /* AGC1 || TIM */
if ((sync & 0xF0) == 0xF0) /* TIM && EQU && CAR && FEC */
*status |= FE_HAS_LOCK;
- return 0;
+ break;
+
}
-static int at76c651_read_ber(struct dvb_frontend* fe, u32* ber)
+ case FE_READ_BER:
{
- struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+ u32 *ber = (u32 *) arg;
- *ber = (at76c651_readreg(state, 0x81) & 0x0F) << 16;
- *ber |= at76c651_readreg(state, 0x82) << 8;
- *ber |= at76c651_readreg(state, 0x83);
+ *ber = (at76c651_readreg(fe->i2c, 0x81) & 0x0F) << 16;
+ *ber |= at76c651_readreg(fe->i2c, 0x82) << 8;
+ *ber |= at76c651_readreg(fe->i2c, 0x83);
*ber *= 10;
- return 0;
+ break;
}
-static int at76c651_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+ case FE_READ_SIGNAL_STRENGTH:
{
- struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+ u8 gain = ~at76c651_readreg(fe->i2c, 0x91);
- u8 gain = ~at76c651_readreg(state, 0x91);
- *strength = (gain << 8) | gain;
+ *(u16 *) arg = (gain << 8) | gain;
+ break;
+ }
- return 0;
-}
+ case FE_READ_SNR:
+ *(u16 *) arg =
+ 0xFFFF -
+ ((at76c651_readreg(fe->i2c, 0x8F) << 8) |
+ at76c651_readreg(fe->i2c, 0x90));
+ break;
-static int at76c651_read_snr(struct dvb_frontend* fe, u16* snr)
-{
- struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+ case FE_READ_UNCORRECTED_BLOCKS:
+ *(u32 *) arg = at76c651_readreg(fe->i2c, 0x82);
+ break;
- *snr = 0xFFFF -
- ((at76c651_readreg(state, 0x8F) << 8) |
- at76c651_readreg(state, 0x90));
+ case FE_SET_FRONTEND:
+ return at76c651_set_parameters(fe->i2c, arg);
+ case FE_GET_FRONTEND:
+ break;
- return 0;
-}
+ case FE_SLEEP:
+ break;
-static int at76c651_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+ case FE_INIT:
+ return at76c651_set_defaults(fe->i2c);
+
+ case FE_GET_TUNE_SETTINGS:
{
- struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
+ struct dvb_frontend_tune_settings* fesettings = (struct dvb_frontend_tune_settings*) arg;
+ fesettings->min_delay_ms = 50;
+ fesettings->step_size = 0;
+ fesettings->max_drift = 0;
+ return 0;
+ }
- *ucblocks = at76c651_readreg(state, 0x82);
+ default:
+ return -ENOIOCTLCMD;
+ }
return 0;
+
}
-static int at76c651_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *fesettings)
+static int at76c651_attach(struct dvb_i2c_bus *i2c, void **data)
{
- fesettings->min_delay_ms = 50;
- fesettings->step_size = 0;
- fesettings->max_drift = 0;
- return 0;
+ if ( (at76c651_readreg(i2c, 0x0E) != 0x65) ||
+ ( ( (at76c651_revision = at76c651_readreg(i2c, 0x0F)) & 0xFE) != 0x10) )
+{
+ dprintk("no AT76C651(B) found\n");
+ return -ENODEV;
}
-static void at76c651_release(struct dvb_frontend* fe)
-{
- struct at76c651_state* state = (struct at76c651_state*) fe->demodulator_priv;
- kfree(state);
+ if (at76c651_revision == 0x10)
+ {
+ dprintk("AT76C651A found\n");
+ strcpy(at76c651_info.name,"Atmel AT76C651A with DAT7021");
+ }
+ else
+ {
+ strcpy(at76c651_info.name,"Atmel AT76C651B with DAT7021");
+ dprintk("AT76C651B found\n");
}
-static struct dvb_frontend_ops at76c651_ops;
+ at76c651_set_defaults(i2c);
-struct dvb_frontend* at76c651_attach(const struct at76c651_config* config,
- struct i2c_adapter* i2c)
-{
- struct at76c651_state* state = NULL;
+ return dvb_register_frontend(at76c651_ioctl, i2c, NULL, &at76c651_info);
- /* 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;
+static void at76c651_detach(struct dvb_i2c_bus *i2c, void *data)
+{
- /* check if the demod is there */
- if (at76c651_readreg(state, 0x0e) != 0x65) goto error;
+ dvb_unregister_frontend(at76c651_ioctl, i2c);
- /* 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;
+static int __init at76c651_init(void)
+{
+
+ return dvb_register_i2c_device(THIS_MODULE, at76c651_attach,
+ at76c651_detach);
-error:
- if (state) 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,
-};
+static void __exit at76c651_exit(void)
+{
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+ dvb_unregister_i2c_device(at76c651_attach);
-MODULE_DESCRIPTION("Atmel AT76C651 DVB-C Demodulator Driver");
+}
+
+module_init(at76c651_init);
+module_exit(at76c651_exit);
+
+MODULE_DESCRIPTION("at76c651/dat7021 dvb-c frontend driver");
MODULE_AUTHOR("Andreas Oberritter <obi@linuxtv.org>");
MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(at76c651_attach);
+MODULE_PARM(debug, "i");
git://git.onelab.eu / linux-2.6.git / blobdiff