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NetBSD/sys/dev/i2c/zl10353.c
jmcneill 22ca8619b1 i2c devices don't actually have a dependency on "iic" (the bus driver) 
but on "i2cexec". Create an i2cexec module (i2c_exec.c) to mirror the
dependencies in files.i2c and switch device drivers to depend on "i2cexec"
module instead.

A kernel with a USB stack and no I2C controller / bus attachment would spit
out a bunch of "WARNING: module error: can't find builtin dependency `iic'"
messages at boot. This change solves that problem.
2015-03-07 14:16:51 +00:00

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/* $NetBSD: zl10353.c,v 1.4 2015/03/07 14:16:51 jmcneill Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jukka Ruohonen.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: zl10353.c,v 1.4 2015/03/07 14:16:51 jmcneill Exp $");
#include <sys/param.h>
#include <sys/kmem.h>
#include <sys/module.h>
#include <dev/dtv/dtvif.h>
#include <dev/i2c/i2cvar.h>
#include <dev/i2c/zl10353reg.h>
#include <dev/i2c/zl10353var.h>
/*
* Zarlink ZL10353 demodulator (now known as Intel CE623x).
*
* An incomplete datasheet:
*
* Intel Corporation: CE6230 - COFDM demodulator with
* USB interface for PC-TV. Data Sheet, Revision 1.1.
* March 29, 2007.
*/
static int zl10353_probe(struct zl10353 *);
static int zl10353_read(struct zl10353 *, uint8_t, uint8_t *);
static int zl10353_write(struct zl10353 *, uint8_t, uint8_t);
static int zl10353_reset(struct zl10353 *, bool);
static int zl10353_set_agc(struct zl10353 *,
const struct dvb_frontend_parameters *);
static int zl10353_set_bw(struct zl10353 *, fe_bandwidth_t);
static int zl10353_set_rate(struct zl10353 *);
static int zl10353_set_freq(struct zl10353 *);
static int zl10353_set_tps(struct zl10353 *,
const struct dvb_frontend_parameters *);
static int zl10353_get_guard(fe_guard_interval_t, uint16_t *);
static int zl10353_get_mode(fe_transmit_mode_t, uint16_t *);
static int zl10353_get_fec(fe_code_rate_t, bool, uint16_t *);
static int zl10353_get_modulation(fe_modulation_t, uint16_t *);
static int zl10353_get_hier(fe_hierarchy_t, uint16_t *);
struct zl10353 *
zl10353_open(device_t parent, i2c_tag_t i2c, i2c_addr_t addr)
{
struct zl10353 *zl;
zl = kmem_zalloc(sizeof(*zl), KM_SLEEP);
if (zl == NULL)
return NULL;
zl->zl_i2c = i2c;
zl->zl_i2c_addr = addr;
zl->zl_parent = parent;
zl->zl_freq = ZL10353_DEFAULT_INPUT_FREQ;
zl->zl_clock = ZL10353_DEFAULT_CLOCK_MHZ;
if (zl10353_reset(zl, true) != 0) {
zl10353_close(zl);
return NULL;
}
if (zl10353_probe(zl) != 0) {
zl10353_close(zl);
return NULL;
}
return zl;
}
void
zl10353_close(struct zl10353 *zl)
{
kmem_free(zl, sizeof(*zl));
}
static int
zl10353_probe(struct zl10353 *zl)
{
uint8_t val;
int rv;
if ((rv = zl10353_read(zl, ZL10353_REG_ID, &val)) != 0)
return rv;
switch (val) {
case ZL10353_ID_CE6230:
zl->zl_name = "Intel CE6230";
break;
case ZL10353_ID_CE6231:
zl->zl_name = "Intel CE6231";
break;
case ZL10353_ID_ZL10353:
zl->zl_name = "Zarlink ZL10353";
break;
default:
aprint_error_dev(zl->zl_parent, "unknown chip 0x%02x\n", val);
return ENOTSUP;
}
aprint_verbose_dev(zl->zl_parent, "found %s at i2c "
"addr 0x%02x\n", zl->zl_name, zl->zl_i2c_addr);
return 0;
}
static int
zl10353_read(struct zl10353 *zl, uint8_t reg, uint8_t *valp)
{
static const i2c_op_t op = I2C_OP_READ;
int rv;
if ((rv = iic_acquire_bus(zl->zl_i2c, 0)) != 0)
return rv;
rv = iic_exec(zl->zl_i2c, op, zl->zl_i2c_addr, &reg, 1, valp, 1, 0);
iic_release_bus(zl->zl_i2c, 0);
return rv;
}
static int
zl10353_write(struct zl10353 *zl, uint8_t reg, uint8_t val)
{
static const i2c_op_t op = I2C_OP_WRITE;
const uint8_t cmd[2] = { reg, val };
int rv;
if ((rv = iic_acquire_bus(zl->zl_i2c, 0)) != 0)
return rv;
rv = iic_exec(zl->zl_i2c, op, zl->zl_i2c_addr, cmd, 2, NULL, 0, 0);
iic_release_bus(zl->zl_i2c, 0);
return rv;
}
static int
zl10353_reset(struct zl10353 *zl, bool hard)
{
size_t i = 0, len = 5;
int rv;
static const struct {
uint8_t reg;
uint8_t val;
} reset[] = {
{ 0x50, 0x03 }, /* Hard */
{ 0x03, 0x44 },
{ 0x44, 0x46 },
{ 0x46, 0x15 },
{ 0x15, 0x0f },
{ 0x55, 0x80 }, /* Soft */
{ 0xea, 0x01 },
{ 0xea, 0x00 },
};
if (hard != true) {
len = __arraycount(reset);
i = 5;
}
while (i < len) {
if ((rv = zl10353_write(zl, reset[i].reg, reset[i].val)) != 0)
return rv;
else {
delay(100);
}
i++;
}
return 0;
}
void
zl10353_get_devinfo(struct dvb_frontend_info *fi)
{
fi->type = FE_OFDM;
fi->frequency_min = 174000000;
fi->frequency_max = 862000000;
fi->frequency_tolerance = 0;
fi->frequency_stepsize = 166667;
fi->caps |= 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_QPSK |
FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_RECOVER |
FE_CAN_MUTE_TS;
fi->caps |= FE_CAN_FEC_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_QAM_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO;
}
int
zl10353_set_params(struct zl10353 *zl,const struct dvb_frontend_parameters *fp)
{
int rv;
/* 1. Soft reset. */
if ((rv = zl10353_reset(zl, false)) != 0)
return rv;
/* 2. Set AGC. */
if ((rv = zl10353_set_agc(zl, fp)) != 0)
return rv;
/* 3. Set bandwidth. */
if ((rv = zl10353_set_bw(zl, fp->u.ofdm.bandwidth)) != 0)
return rv;
/* 4. Set nominal rate. */
if ((rv = zl10353_set_rate(zl)) != 0)
return rv;
/* 5. Set input frequency. */
if ((rv = zl10353_set_freq(zl)) != 0)
return rv;
/* 6. Set TPS parameters. */
if ((rv = zl10353_set_tps(zl, fp)) != 0)
return rv;
return 0;
}
int
zl10353_set_fsm(struct zl10353 *zl)
{
return zl10353_write(zl, ZL10353_REG_FSM, ZL10353_FSM_START);
}
int
zl10353_set_gate(void *aux, bool enable)
{
uint8_t val = ZL10353_GATE_DISABLE;
if (enable != false)
val = ZL10353_GATE_ENABLE;
return zl10353_write(aux, ZL10353_REG_GATE, val);
}
static int
zl10353_set_agc(struct zl10353 *zl, const struct dvb_frontend_parameters *fp)
{
const struct dvb_ofdm_parameters *ofdm = &fp->u.ofdm;
uint8_t val = ZL10353_AGC_TARGET_DEFAULT;
int rv;
if ((rv = zl10353_write(zl, ZL10353_REG_AGC_TARGET, val)) != 0)
return rv;
else {
val = 0;
}
if (ofdm->guard_interval != GUARD_INTERVAL_AUTO)
val |= ZL10353_AGC_CTRL_GUARD_NONAUTO;
if (ofdm->transmission_mode != TRANSMISSION_MODE_AUTO)
val |= ZL10353_AGC_CTRL_MODE_NONAUTO;
return zl10353_write(zl, ZL10353_REG_AGC_CTRL, val);
}
static int
zl10353_set_bw(struct zl10353 *zl, fe_bandwidth_t bw)
{
uint8_t val[3];
int rv;
switch (bw) {
case BANDWIDTH_6_MHZ:
val[0] = ZL10353_BW_1_6_MHZ;
val[1] = ZL10353_BW_2_6_MHZ;
val[2] = ZL10353_BW_3_6_MHZ;
zl->zl_bw = 6;
break;
case BANDWIDTH_7_MHZ:
val[0] = ZL10353_BW_1_7_MHZ;
val[1] = ZL10353_BW_2_7_MHZ;
val[2] = ZL10353_BW_3_7_MHZ;
zl->zl_bw = 7;
break;
case BANDWIDTH_8_MHZ:
val[0] = ZL10353_BW_1_8_MHZ;
val[1] = ZL10353_BW_2_8_MHZ;
val[2] = ZL10353_BW_3_8_MHZ;
zl->zl_bw = 8;
break;
default:
zl->zl_bw = 0;
return EINVAL;
}
if ((rv = zl10353_write(zl, ZL10353_REG_BW_1, val[0])) != 0)
return rv;
if ((rv = zl10353_write(zl, ZL10353_REG_BW_2, val[1])) != 0)
return rv;
if ((rv = zl10353_write(zl, ZL10353_REG_BW_3, val[2])) != 0)
return rv;
return 0;
}
static int
zl10353_set_rate(struct zl10353 *zl)
{
static const uint64_t c = 1497965625;
uint64_t val;
int rv;
KASSERT(zl->zl_bw >= 6 && zl->zl_bw <= 8);
KASSERT(zl->zl_clock > 0 && zl->zl_freq > 0);
val = zl->zl_bw * c;
val += zl->zl_clock >> 1;
val /= zl->zl_clock;
val = val & 0xffff;
if ((rv = zl10353_write(zl, ZL10353_REG_RATE_1, val >> 8)) != 0)
return rv;
return zl10353_write(zl, ZL10353_REG_RATE_2, val & 0xff);
}
static int
zl10353_set_freq(struct zl10353 *zl)
{
const uint16_t val = zl->zl_freq;
int rv;
if ((rv = zl10353_write(zl, ZL10353_REG_FREQ_1, val >> 8)) != 0)
return rv;
return zl10353_write(zl, ZL10353_REG_FREQ_2, val & 0xff);
}
static int
zl10353_set_tps(struct zl10353 *zl, const struct dvb_frontend_parameters *fp)
{
const struct dvb_ofdm_parameters *ofdm = &fp->u.ofdm;
uint16_t val = 0;
int rv;
if ((rv = zl10353_get_guard(ofdm->guard_interval, &val)) != 0)
goto fail;
if ((rv = zl10353_get_mode(ofdm->transmission_mode, &val)) != 0)
goto fail;
if ((rv = zl10353_get_fec(ofdm->code_rate_HP, true, &val)) != 0)
goto fail;
if ((rv = zl10353_get_fec(ofdm->code_rate_LP, false, &val)) != 0)
goto fail;
if ((rv = zl10353_get_modulation(ofdm->constellation, &val)) != 0)
goto fail;
if ((rv = zl10353_get_hier(ofdm->hierarchy_information, &val)) != 0)
goto fail;
if ((rv = zl10353_write(zl, ZL10353_REG_TPS_1, val >> 8)) != 0)
goto fail;
if ((rv = zl10353_write(zl, ZL10353_REG_TPS_2, val & 0xff)) != 0)
goto fail;
return 0;
fail:
aprint_error_dev(zl->zl_parent, "failed to set "
"tps for %s (err %d)\n", zl->zl_name, rv);
return rv;
}
static int
zl10353_get_guard(fe_guard_interval_t fg, uint16_t *valp)
{
switch (fg) {
case GUARD_INTERVAL_1_4:
*valp |= ZL10353_TPS_GUARD_1_4;
break;
case GUARD_INTERVAL_1_8:
*valp |= ZL10353_TPS_GUARD_1_8;
break;
case GUARD_INTERVAL_1_16:
*valp |= ZL10353_TPS_GUARD_1_16;
break;
case GUARD_INTERVAL_1_32:
*valp |= ZL10353_TPS_GUARD_1_32;
break;
case GUARD_INTERVAL_AUTO:
*valp |= ZL10353_TPS_GUARD_AUTO;
break;
default:
return EINVAL;
}
return 0;
}
static int
zl10353_get_mode(fe_transmit_mode_t fm, uint16_t *valp)
{
switch (fm) {
case TRANSMISSION_MODE_2K:
*valp |= ZL10353_TPS_MODE_2K;
break;
case TRANSMISSION_MODE_8K:
*valp |= ZL10353_TPS_MODE_8K;
break;
case TRANSMISSION_MODE_AUTO:
*valp |= ZL10353_TPS_MODE_AUTO;
break;
default:
return EINVAL;
}
return 0;
}
static int
zl10353_get_fec(fe_code_rate_t fc, bool hp, uint16_t *valp)
{
uint16_t hpval = 0, lpval = 0;
switch (fc) {
case FEC_1_2:
hpval = ZL10353_TPS_HP_FEC_1_2;
lpval = ZL10353_TPS_LP_FEC_1_2;
break;
case FEC_2_3:
hpval = ZL10353_TPS_HP_FEC_2_3;
lpval = ZL10353_TPS_LP_FEC_2_3;
break;
case FEC_3_4:
hpval = ZL10353_TPS_HP_FEC_3_4;
lpval = ZL10353_TPS_LP_FEC_3_4;
break;
case FEC_5_6:
hpval = ZL10353_TPS_HP_FEC_5_6;
lpval = ZL10353_TPS_LP_FEC_5_6;
break;
case FEC_7_8:
hpval = ZL10353_TPS_HP_FEC_7_8;
lpval = ZL10353_TPS_LP_FEC_7_8;
break;
case FEC_AUTO:
hpval = ZL10353_TPS_HP_FEC_AUTO;
lpval = ZL10353_TPS_LP_FEC_AUTO;
break;
case FEC_NONE:
return EOPNOTSUPP;
default:
return EINVAL;
}
*valp |= (hp != false) ? hpval : lpval;
return 0;
}
static int
zl10353_get_modulation(fe_modulation_t fm, uint16_t *valp)
{
switch (fm) {
case QPSK:
*valp |= ZL10353_TPS_MODULATION_QPSK;
break;
case QAM_16:
*valp |= ZL10353_TPS_MODULATION_QAM_16;
break;
case QAM_64:
*valp |= ZL10353_TPS_MODULATION_QAM_64;
break;
case QAM_AUTO:
*valp |= ZL10353_TPS_MODULATION_QAM_AUTO;
break;
default:
return EINVAL;
}
return 0;
}
static int
zl10353_get_hier(fe_hierarchy_t fh, uint16_t *valp)
{
switch (fh) {
case HIERARCHY_1:
*valp |= ZL10353_TPS_HIERARCHY_1;
break;
case HIERARCHY_2:
*valp |= ZL10353_TPS_HIERARCHY_2;
break;
case HIERARCHY_4:
*valp |= ZL10353_TPS_HIERARCHY_4;
break;
case HIERARCHY_NONE:
*valp |= ZL10353_TPS_HIERARCHY_NONE;
break;
case HIERARCHY_AUTO:
*valp |= ZL10353_TPS_HIERARCHY_AUTO;
break;
default:
return EINVAL;
}
return 0;
}
fe_status_t
zl10353_get_status(struct zl10353 *zl)
{
const uint8_t lock = FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC;
fe_status_t fs = 0;
uint8_t val;
if (zl10353_read(zl, ZL10353_REG_STATUS_LOCK, &val) == 0) {
if ((val & ZL10353_STATUS_LOCK_ON) != 0)
fs |= FE_HAS_LOCK;
if ((val & ZL10353_STATUS_LOCK_CARRIER) != 0)
fs |= FE_HAS_CARRIER;
if ((val & ZL10353_STATUS_LOCK_VITERBI) != 0)
fs |= FE_HAS_VITERBI;
}
if (zl10353_read(zl, ZL10353_REG_STATUS_SYNC, &val) == 0) {
if ((val & ZL10353_STATUS_SYNC_ON) != 0)
fs |= FE_HAS_SYNC;
}
if (zl10353_read(zl, ZL10353_REG_STATUS_SIGNAL, &val) == 0) {
if ((val & ZL10353_STATUS_SIGNAL_ON) != 0)
fs |= FE_HAS_SIGNAL;
}
return ((fs & lock) != lock) ? fs & ~FE_HAS_LOCK : fs;
};
uint16_t
zl10353_get_signal_strength(struct zl10353 *zl)
{
uint8_t val1, val2;
if (zl10353_read(zl, ZL10353_REG_SIGSTR_1, &val1) != 0)
return 0;
if (zl10353_read(zl, ZL10353_REG_SIGSTR_2, &val2) != 0)
return 0;
return val1 << 10 | val2 << 2 | 0x03;
}
uint16_t
zl10353_get_snr(struct zl10353 *zl)
{
uint8_t val;
if (zl10353_read(zl, ZL10353_REG_SNR, &val) != 0)
return 0;
return (val << 8) | val;
}
MODULE(MODULE_CLASS_DRIVER, zl10353, "i2cexec");
static int
zl10353_modcmd(modcmd_t cmd, void *aux)
{
if (cmd != MODULE_CMD_INIT && cmd != MODULE_CMD_FINI)
return ENOTTY;
return 0;
}
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