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linux-stable/sound/soc/fsl/fsl_easrc.c
Uwe Kleine-König 0c880ae7c0
ASoC: fsl: fsl_easrc: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20230315150745.67084-69-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-20 13:08:00 +00:00

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// SPDX-License-Identifier: GPL-2.0
// Copyright 2019 NXP
#include <linux/atomic.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/kobject.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/sched/signal.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#include <linux/gcd.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/core.h>
#include "fsl_easrc.h"
#include "imx-pcm.h"
#define FSL_EASRC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_U16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S24_3LE | \
SNDRV_PCM_FMTBIT_U24_LE | \
SNDRV_PCM_FMTBIT_U24_3LE | \
SNDRV_PCM_FMTBIT_S32_LE | \
SNDRV_PCM_FMTBIT_U32_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_U20_3LE | \
SNDRV_PCM_FMTBIT_FLOAT_LE)
static int fsl_easrc_iec958_put_bits(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
struct fsl_asrc *easrc = snd_soc_component_get_drvdata(comp);
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct soc_mreg_control *mc =
(struct soc_mreg_control *)kcontrol->private_value;
unsigned int regval = ucontrol->value.integer.value[0];
easrc_priv->bps_iec958[mc->regbase] = regval;
return 0;
}
static int fsl_easrc_iec958_get_bits(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
struct fsl_asrc *easrc = snd_soc_component_get_drvdata(comp);
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct soc_mreg_control *mc =
(struct soc_mreg_control *)kcontrol->private_value;
ucontrol->value.enumerated.item[0] = easrc_priv->bps_iec958[mc->regbase];
return 0;
}
static int fsl_easrc_get_reg(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct soc_mreg_control *mc =
(struct soc_mreg_control *)kcontrol->private_value;
unsigned int regval;
regval = snd_soc_component_read(component, mc->regbase);
ucontrol->value.integer.value[0] = regval;
return 0;
}
static int fsl_easrc_set_reg(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct soc_mreg_control *mc =
(struct soc_mreg_control *)kcontrol->private_value;
unsigned int regval = ucontrol->value.integer.value[0];
int ret;
ret = snd_soc_component_write(component, mc->regbase, regval);
if (ret < 0)
return ret;
return 0;
}
#define SOC_SINGLE_REG_RW(xname, xreg) \
{ .iface = SNDRV_CTL_ELEM_IFACE_PCM, .name = (xname), \
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE, \
.info = snd_soc_info_xr_sx, .get = fsl_easrc_get_reg, \
.put = fsl_easrc_set_reg, \
.private_value = (unsigned long)&(struct soc_mreg_control) \
{ .regbase = xreg, .regcount = 1, .nbits = 32, \
.invert = 0, .min = 0, .max = 0xffffffff, } }
#define SOC_SINGLE_VAL_RW(xname, xreg) \
{ .iface = SNDRV_CTL_ELEM_IFACE_PCM, .name = (xname), \
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE, \
.info = snd_soc_info_xr_sx, .get = fsl_easrc_iec958_get_bits, \
.put = fsl_easrc_iec958_put_bits, \
.private_value = (unsigned long)&(struct soc_mreg_control) \
{ .regbase = xreg, .regcount = 1, .nbits = 32, \
.invert = 0, .min = 0, .max = 2, } }
static const struct snd_kcontrol_new fsl_easrc_snd_controls[] = {
SOC_SINGLE("Context 0 Dither Switch", REG_EASRC_COC(0), 0, 1, 0),
SOC_SINGLE("Context 1 Dither Switch", REG_EASRC_COC(1), 0, 1, 0),
SOC_SINGLE("Context 2 Dither Switch", REG_EASRC_COC(2), 0, 1, 0),
SOC_SINGLE("Context 3 Dither Switch", REG_EASRC_COC(3), 0, 1, 0),
SOC_SINGLE("Context 0 IEC958 Validity", REG_EASRC_COC(0), 2, 1, 0),
SOC_SINGLE("Context 1 IEC958 Validity", REG_EASRC_COC(1), 2, 1, 0),
SOC_SINGLE("Context 2 IEC958 Validity", REG_EASRC_COC(2), 2, 1, 0),
SOC_SINGLE("Context 3 IEC958 Validity", REG_EASRC_COC(3), 2, 1, 0),
SOC_SINGLE_VAL_RW("Context 0 IEC958 Bits Per Sample", 0),
SOC_SINGLE_VAL_RW("Context 1 IEC958 Bits Per Sample", 1),
SOC_SINGLE_VAL_RW("Context 2 IEC958 Bits Per Sample", 2),
SOC_SINGLE_VAL_RW("Context 3 IEC958 Bits Per Sample", 3),
SOC_SINGLE_REG_RW("Context 0 IEC958 CS0", REG_EASRC_CS0(0)),
SOC_SINGLE_REG_RW("Context 1 IEC958 CS0", REG_EASRC_CS0(1)),
SOC_SINGLE_REG_RW("Context 2 IEC958 CS0", REG_EASRC_CS0(2)),
SOC_SINGLE_REG_RW("Context 3 IEC958 CS0", REG_EASRC_CS0(3)),
SOC_SINGLE_REG_RW("Context 0 IEC958 CS1", REG_EASRC_CS1(0)),
SOC_SINGLE_REG_RW("Context 1 IEC958 CS1", REG_EASRC_CS1(1)),
SOC_SINGLE_REG_RW("Context 2 IEC958 CS1", REG_EASRC_CS1(2)),
SOC_SINGLE_REG_RW("Context 3 IEC958 CS1", REG_EASRC_CS1(3)),
SOC_SINGLE_REG_RW("Context 0 IEC958 CS2", REG_EASRC_CS2(0)),
SOC_SINGLE_REG_RW("Context 1 IEC958 CS2", REG_EASRC_CS2(1)),
SOC_SINGLE_REG_RW("Context 2 IEC958 CS2", REG_EASRC_CS2(2)),
SOC_SINGLE_REG_RW("Context 3 IEC958 CS2", REG_EASRC_CS2(3)),
SOC_SINGLE_REG_RW("Context 0 IEC958 CS3", REG_EASRC_CS3(0)),
SOC_SINGLE_REG_RW("Context 1 IEC958 CS3", REG_EASRC_CS3(1)),
SOC_SINGLE_REG_RW("Context 2 IEC958 CS3", REG_EASRC_CS3(2)),
SOC_SINGLE_REG_RW("Context 3 IEC958 CS3", REG_EASRC_CS3(3)),
SOC_SINGLE_REG_RW("Context 0 IEC958 CS4", REG_EASRC_CS4(0)),
SOC_SINGLE_REG_RW("Context 1 IEC958 CS4", REG_EASRC_CS4(1)),
SOC_SINGLE_REG_RW("Context 2 IEC958 CS4", REG_EASRC_CS4(2)),
SOC_SINGLE_REG_RW("Context 3 IEC958 CS4", REG_EASRC_CS4(3)),
SOC_SINGLE_REG_RW("Context 0 IEC958 CS5", REG_EASRC_CS5(0)),
SOC_SINGLE_REG_RW("Context 1 IEC958 CS5", REG_EASRC_CS5(1)),
SOC_SINGLE_REG_RW("Context 2 IEC958 CS5", REG_EASRC_CS5(2)),
SOC_SINGLE_REG_RW("Context 3 IEC958 CS5", REG_EASRC_CS5(3)),
};
/*
* fsl_easrc_set_rs_ratio
*
* According to the resample taps, calculate the resample ratio
* ratio = in_rate / out_rate
*/
static int fsl_easrc_set_rs_ratio(struct fsl_asrc_pair *ctx)
{
struct fsl_asrc *easrc = ctx->asrc;
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct fsl_easrc_ctx_priv *ctx_priv = ctx->private;
unsigned int in_rate = ctx_priv->in_params.norm_rate;
unsigned int out_rate = ctx_priv->out_params.norm_rate;
unsigned int frac_bits;
u64 val;
u32 *r;
switch (easrc_priv->rs_num_taps) {
case EASRC_RS_32_TAPS:
/* integer bits = 5; */
frac_bits = 39;
break;
case EASRC_RS_64_TAPS:
/* integer bits = 6; */
frac_bits = 38;
break;
case EASRC_RS_128_TAPS:
/* integer bits = 7; */
frac_bits = 37;
break;
default:
return -EINVAL;
}
val = (u64)in_rate << frac_bits;
do_div(val, out_rate);
r = (uint32_t *)&val;
if (r[1] & 0xFFFFF000) {
dev_err(&easrc->pdev->dev, "ratio exceed range\n");
return -EINVAL;
}
regmap_write(easrc->regmap, REG_EASRC_RRL(ctx->index),
EASRC_RRL_RS_RL(r[0]));
regmap_write(easrc->regmap, REG_EASRC_RRH(ctx->index),
EASRC_RRH_RS_RH(r[1]));
return 0;
}
/* Normalize input and output sample rates */
static void fsl_easrc_normalize_rates(struct fsl_asrc_pair *ctx)
{
struct fsl_easrc_ctx_priv *ctx_priv;
int a, b;
if (!ctx)
return;
ctx_priv = ctx->private;
a = ctx_priv->in_params.sample_rate;
b = ctx_priv->out_params.sample_rate;
a = gcd(a, b);
/* Divide by gcd to normalize the rate */
ctx_priv->in_params.norm_rate = ctx_priv->in_params.sample_rate / a;
ctx_priv->out_params.norm_rate = ctx_priv->out_params.sample_rate / a;
}
/* Resets the pointer of the coeff memory pointers */
static int fsl_easrc_coeff_mem_ptr_reset(struct fsl_asrc *easrc,
unsigned int ctx_id, int mem_type)
{
struct device *dev;
u32 reg, mask, val;
if (!easrc)
return -ENODEV;
dev = &easrc->pdev->dev;
switch (mem_type) {
case EASRC_PF_COEFF_MEM:
/* This resets the prefilter memory pointer addr */
if (ctx_id >= EASRC_CTX_MAX_NUM) {
dev_err(dev, "Invalid context id[%d]\n", ctx_id);
return -EINVAL;
}
reg = REG_EASRC_CCE1(ctx_id);
mask = EASRC_CCE1_COEF_MEM_RST_MASK;
val = EASRC_CCE1_COEF_MEM_RST;
break;
case EASRC_RS_COEFF_MEM:
/* This resets the resampling memory pointer addr */
reg = REG_EASRC_CRCC;
mask = EASRC_CRCC_RS_CPR_MASK;
val = EASRC_CRCC_RS_CPR;
break;
default:
dev_err(dev, "Unknown memory type\n");
return -EINVAL;
}
/*
* To reset the write pointer back to zero, the register field
* ASRC_CTX_CTRL_EXT1x[PF_COEFF_MEM_RST] can be toggled from
* 0x0 to 0x1 to 0x0.
*/
regmap_update_bits(easrc->regmap, reg, mask, 0);
regmap_update_bits(easrc->regmap, reg, mask, val);
regmap_update_bits(easrc->regmap, reg, mask, 0);
return 0;
}
static inline uint32_t bits_taps_to_val(unsigned int t)
{
switch (t) {
case EASRC_RS_32_TAPS:
return 32;
case EASRC_RS_64_TAPS:
return 64;
case EASRC_RS_128_TAPS:
return 128;
}
return 0;
}
static int fsl_easrc_resampler_config(struct fsl_asrc *easrc)
{
struct device *dev = &easrc->pdev->dev;
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct asrc_firmware_hdr *hdr = easrc_priv->firmware_hdr;
struct interp_params *interp = easrc_priv->interp;
struct interp_params *selected_interp = NULL;
unsigned int num_coeff;
unsigned int i;
u64 *coef;
u32 *r;
int ret;
if (!hdr) {
dev_err(dev, "firmware not loaded!\n");
return -ENODEV;
}
for (i = 0; i < hdr->interp_scen; i++) {
if ((interp[i].num_taps - 1) !=
bits_taps_to_val(easrc_priv->rs_num_taps))
continue;
coef = interp[i].coeff;
selected_interp = &interp[i];
dev_dbg(dev, "Selected interp_filter: %u taps - %u phases\n",
selected_interp->num_taps,
selected_interp->num_phases);
break;
}
if (!selected_interp) {
dev_err(dev, "failed to get interpreter configuration\n");
return -EINVAL;
}
/*
* RS_LOW - first half of center tap of the sinc function
* RS_HIGH - second half of center tap of the sinc function
* This is due to the fact the resampling function must be
* symetrical - i.e. odd number of taps
*/
r = (uint32_t *)&selected_interp->center_tap;
regmap_write(easrc->regmap, REG_EASRC_RCTCL, EASRC_RCTCL_RS_CL(r[0]));
regmap_write(easrc->regmap, REG_EASRC_RCTCH, EASRC_RCTCH_RS_CH(r[1]));
/*
* Write Number of Resampling Coefficient Taps
* 00b - 32-Tap Resampling Filter
* 01b - 64-Tap Resampling Filter
* 10b - 128-Tap Resampling Filter
* 11b - N/A
*/
regmap_update_bits(easrc->regmap, REG_EASRC_CRCC,
EASRC_CRCC_RS_TAPS_MASK,
EASRC_CRCC_RS_TAPS(easrc_priv->rs_num_taps));
/* Reset prefilter coefficient pointer back to 0 */
ret = fsl_easrc_coeff_mem_ptr_reset(easrc, 0, EASRC_RS_COEFF_MEM);
if (ret)
return ret;
/*
* When the filter is programmed to run in:
* 32-tap mode, 16-taps, 128-phases 4-coefficients per phase
* 64-tap mode, 32-taps, 64-phases 4-coefficients per phase
* 128-tap mode, 64-taps, 32-phases 4-coefficients per phase
* This means the number of writes is constant no matter
* the mode we are using
*/
num_coeff = 16 * 128 * 4;
for (i = 0; i < num_coeff; i++) {
r = (uint32_t *)&coef[i];
regmap_write(easrc->regmap, REG_EASRC_CRCM,
EASRC_CRCM_RS_CWD(r[0]));
regmap_write(easrc->regmap, REG_EASRC_CRCM,
EASRC_CRCM_RS_CWD(r[1]));
}
return 0;
}
/**
* fsl_easrc_normalize_filter - Scale filter coefficients (64 bits float)
* For input float32 normalized range (1.0,-1.0) -> output int[16,24,32]:
* scale it by multiplying filter coefficients by 2^31
* For input int[16, 24, 32] -> output float32
* scale it by multiplying filter coefficients by 2^-15, 2^-23, 2^-31
* input:
* @easrc: Structure pointer of fsl_asrc
* @infilter : Pointer to non-scaled input filter
* @shift: The multiply factor
* output:
* @outfilter: scaled filter
*/
static int fsl_easrc_normalize_filter(struct fsl_asrc *easrc,
u64 *infilter,
u64 *outfilter,
int shift)
{
struct device *dev = &easrc->pdev->dev;
u64 coef = *infilter;
s64 exp = (coef & 0x7ff0000000000000ll) >> 52;
u64 outcoef;
/*
* If exponent is zero (value == 0), or 7ff (value == NaNs)
* dont touch the content
*/
if (exp == 0 || exp == 0x7ff) {
*outfilter = coef;
return 0;
}
/* coef * 2^shift ==> exp + shift */
exp += shift;
if ((shift > 0 && exp >= 0x7ff) || (shift < 0 && exp <= 0)) {
dev_err(dev, "coef out of range\n");
return -EINVAL;
}
outcoef = (u64)(coef & 0x800FFFFFFFFFFFFFll) + ((u64)exp << 52);
*outfilter = outcoef;
return 0;
}
static int fsl_easrc_write_pf_coeff_mem(struct fsl_asrc *easrc, int ctx_id,
u64 *coef, int n_taps, int shift)
{
struct device *dev = &easrc->pdev->dev;
int ret = 0;
int i;
u32 *r;
u64 tmp;
/* If STx_NUM_TAPS is set to 0x0 then return */
if (!n_taps)
return 0;
if (!coef) {
dev_err(dev, "coef table is NULL\n");
return -EINVAL;
}
/*
* When switching between stages, the address pointer
* should be reset back to 0x0 before performing a write
*/
ret = fsl_easrc_coeff_mem_ptr_reset(easrc, ctx_id, EASRC_PF_COEFF_MEM);
if (ret)
return ret;
for (i = 0; i < (n_taps + 1) / 2; i++) {
ret = fsl_easrc_normalize_filter(easrc, &coef[i], &tmp, shift);
if (ret)
return ret;
r = (uint32_t *)&tmp;
regmap_write(easrc->regmap, REG_EASRC_PCF(ctx_id),
EASRC_PCF_CD(r[0]));
regmap_write(easrc->regmap, REG_EASRC_PCF(ctx_id),
EASRC_PCF_CD(r[1]));
}
return 0;
}
static int fsl_easrc_prefilter_config(struct fsl_asrc *easrc,
unsigned int ctx_id)
{
struct prefil_params *prefil, *selected_prefil = NULL;
struct fsl_easrc_ctx_priv *ctx_priv;
struct fsl_easrc_priv *easrc_priv;
struct asrc_firmware_hdr *hdr;
struct fsl_asrc_pair *ctx;
struct device *dev;
u32 inrate, outrate, offset = 0;
u32 in_s_rate, out_s_rate;
snd_pcm_format_t in_s_fmt, out_s_fmt;
int ret, i;
if (!easrc)
return -ENODEV;
dev = &easrc->pdev->dev;
if (ctx_id >= EASRC_CTX_MAX_NUM) {
dev_err(dev, "Invalid context id[%d]\n", ctx_id);
return -EINVAL;
}
easrc_priv = easrc->private;
ctx = easrc->pair[ctx_id];
ctx_priv = ctx->private;
in_s_rate = ctx_priv->in_params.sample_rate;
out_s_rate = ctx_priv->out_params.sample_rate;
in_s_fmt = ctx_priv->in_params.sample_format;
out_s_fmt = ctx_priv->out_params.sample_format;
ctx_priv->in_filled_sample = bits_taps_to_val(easrc_priv->rs_num_taps) / 2;
ctx_priv->out_missed_sample = ctx_priv->in_filled_sample * out_s_rate / in_s_rate;
ctx_priv->st1_num_taps = 0;
ctx_priv->st2_num_taps = 0;
regmap_write(easrc->regmap, REG_EASRC_CCE1(ctx_id), 0);
regmap_write(easrc->regmap, REG_EASRC_CCE2(ctx_id), 0);
/*
* The audio float point data range is (-1, 1), the asrc would output
* all zero for float point input and integer output case, that is to
* drop the fractional part of the data directly.
*
* In order to support float to int conversion or int to float
* conversion we need to do special operation on the coefficient to
* enlarge/reduce the data to the expected range.
*
* For float to int case:
* Up sampling:
* 1. Create a 1 tap filter with center tap (only tap) of 2^31
* in 64 bits floating point.
* double value = (double)(((uint64_t)1) << 31)
* 2. Program 1 tap prefilter with center tap above.
*
* Down sampling,
* 1. If the filter is single stage filter, add "shift" to the exponent
* of stage 1 coefficients.
* 2. If the filter is two stage filter , add "shift" to the exponent
* of stage 2 coefficients.
*
* The "shift" is 31, same for int16, int24, int32 case.
*
* For int to float case:
* Up sampling:
* 1. Create a 1 tap filter with center tap (only tap) of 2^-31
* in 64 bits floating point.
* 2. Program 1 tap prefilter with center tap above.
*
* Down sampling,
* 1. If the filter is single stage filter, subtract "shift" to the
* exponent of stage 1 coefficients.
* 2. If the filter is two stage filter , subtract "shift" to the
* exponent of stage 2 coefficients.
*
* The "shift" is 15,23,31, different for int16, int24, int32 case.
*
*/
if (out_s_rate >= in_s_rate) {
if (out_s_rate == in_s_rate)
regmap_update_bits(easrc->regmap,
REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_RS_BYPASS_MASK,
EASRC_CCE1_RS_BYPASS);
ctx_priv->st1_num_taps = 1;
ctx_priv->st1_coeff = &easrc_priv->const_coeff;
ctx_priv->st1_num_exp = 1;
ctx_priv->st2_num_taps = 0;
if (in_s_fmt == SNDRV_PCM_FORMAT_FLOAT_LE &&
out_s_fmt != SNDRV_PCM_FORMAT_FLOAT_LE)
ctx_priv->st1_addexp = 31;
else if (in_s_fmt != SNDRV_PCM_FORMAT_FLOAT_LE &&
out_s_fmt == SNDRV_PCM_FORMAT_FLOAT_LE)
ctx_priv->st1_addexp -= ctx_priv->in_params.fmt.addexp;
} else {
inrate = ctx_priv->in_params.norm_rate;
outrate = ctx_priv->out_params.norm_rate;
hdr = easrc_priv->firmware_hdr;
prefil = easrc_priv->prefil;
for (i = 0; i < hdr->prefil_scen; i++) {
if (inrate == prefil[i].insr &&
outrate == prefil[i].outsr) {
selected_prefil = &prefil[i];
dev_dbg(dev, "Selected prefilter: %u insr, %u outsr, %u st1_taps, %u st2_taps\n",
selected_prefil->insr,
selected_prefil->outsr,
selected_prefil->st1_taps,
selected_prefil->st2_taps);
break;
}
}
if (!selected_prefil) {
dev_err(dev, "Conversion from in ratio %u(%u) to out ratio %u(%u) is not supported\n",
in_s_rate, inrate,
out_s_rate, outrate);
return -EINVAL;
}
/*
* In prefilter coeff array, first st1_num_taps represent the
* stage1 prefilter coefficients followed by next st2_num_taps
* representing stage 2 coefficients
*/
ctx_priv->st1_num_taps = selected_prefil->st1_taps;
ctx_priv->st1_coeff = selected_prefil->coeff;
ctx_priv->st1_num_exp = selected_prefil->st1_exp;
offset = ((selected_prefil->st1_taps + 1) / 2);
ctx_priv->st2_num_taps = selected_prefil->st2_taps;
ctx_priv->st2_coeff = selected_prefil->coeff + offset;
if (in_s_fmt == SNDRV_PCM_FORMAT_FLOAT_LE &&
out_s_fmt != SNDRV_PCM_FORMAT_FLOAT_LE) {
/* only change stage2 coefficient for 2 stage case */
if (ctx_priv->st2_num_taps > 0)
ctx_priv->st2_addexp = 31;
else
ctx_priv->st1_addexp = 31;
} else if (in_s_fmt != SNDRV_PCM_FORMAT_FLOAT_LE &&
out_s_fmt == SNDRV_PCM_FORMAT_FLOAT_LE) {
if (ctx_priv->st2_num_taps > 0)
ctx_priv->st2_addexp -= ctx_priv->in_params.fmt.addexp;
else
ctx_priv->st1_addexp -= ctx_priv->in_params.fmt.addexp;
}
}
ctx_priv->in_filled_sample += (ctx_priv->st1_num_taps / 2) * ctx_priv->st1_num_exp +
ctx_priv->st2_num_taps / 2;
ctx_priv->out_missed_sample = ctx_priv->in_filled_sample * out_s_rate / in_s_rate;
if (ctx_priv->in_filled_sample * out_s_rate % in_s_rate != 0)
ctx_priv->out_missed_sample += 1;
/*
* To modify the value of a prefilter coefficient, the user must
* perform a write to the register ASRC_PRE_COEFF_FIFOn[COEFF_DATA]
* while the respective context RUN_EN bit is set to 0b0
*/
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx_id),
EASRC_CC_EN_MASK, 0);
if (ctx_priv->st1_num_taps > EASRC_MAX_PF_TAPS) {
dev_err(dev, "ST1 taps [%d] mus be lower than %d\n",
ctx_priv->st1_num_taps, EASRC_MAX_PF_TAPS);
ret = -EINVAL;
goto ctx_error;
}
/* Update ctx ST1_NUM_TAPS in Context Control Extended 2 register */
regmap_update_bits(easrc->regmap, REG_EASRC_CCE2(ctx_id),
EASRC_CCE2_ST1_TAPS_MASK,
EASRC_CCE2_ST1_TAPS(ctx_priv->st1_num_taps - 1));
/* Prefilter Coefficient Write Select to write in ST1 coeff */
regmap_update_bits(easrc->regmap, REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_COEF_WS_MASK,
EASRC_PF_ST1_COEFF_WR << EASRC_CCE1_COEF_WS_SHIFT);
ret = fsl_easrc_write_pf_coeff_mem(easrc, ctx_id,
ctx_priv->st1_coeff,
ctx_priv->st1_num_taps,
ctx_priv->st1_addexp);
if (ret)
goto ctx_error;
if (ctx_priv->st2_num_taps > 0) {
if (ctx_priv->st2_num_taps + ctx_priv->st1_num_taps > EASRC_MAX_PF_TAPS) {
dev_err(dev, "ST2 taps [%d] mus be lower than %d\n",
ctx_priv->st2_num_taps, EASRC_MAX_PF_TAPS);
ret = -EINVAL;
goto ctx_error;
}
regmap_update_bits(easrc->regmap, REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_PF_TSEN_MASK,
EASRC_CCE1_PF_TSEN);
/*
* Enable prefilter stage1 writeback floating point
* which is used for FLOAT_LE case
*/
regmap_update_bits(easrc->regmap, REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_PF_ST1_WBFP_MASK,
EASRC_CCE1_PF_ST1_WBFP);
regmap_update_bits(easrc->regmap, REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_PF_EXP_MASK,
EASRC_CCE1_PF_EXP(ctx_priv->st1_num_exp - 1));
/* Update ctx ST2_NUM_TAPS in Context Control Extended 2 reg */
regmap_update_bits(easrc->regmap, REG_EASRC_CCE2(ctx_id),
EASRC_CCE2_ST2_TAPS_MASK,
EASRC_CCE2_ST2_TAPS(ctx_priv->st2_num_taps - 1));
/* Prefilter Coefficient Write Select to write in ST2 coeff */
regmap_update_bits(easrc->regmap, REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_COEF_WS_MASK,
EASRC_PF_ST2_COEFF_WR << EASRC_CCE1_COEF_WS_SHIFT);
ret = fsl_easrc_write_pf_coeff_mem(easrc, ctx_id,
ctx_priv->st2_coeff,
ctx_priv->st2_num_taps,
ctx_priv->st2_addexp);
if (ret)
goto ctx_error;
}
return 0;
ctx_error:
return ret;
}
static int fsl_easrc_max_ch_for_slot(struct fsl_asrc_pair *ctx,
struct fsl_easrc_slot *slot)
{
struct fsl_easrc_ctx_priv *ctx_priv = ctx->private;
int st1_mem_alloc = 0, st2_mem_alloc = 0;
int pf_mem_alloc = 0;
int max_channels = 8 - slot->num_channel;
int channels = 0;
if (ctx_priv->st1_num_taps > 0) {
if (ctx_priv->st2_num_taps > 0)
st1_mem_alloc =
(ctx_priv->st1_num_taps - 1) * ctx_priv->st1_num_exp + 1;
else
st1_mem_alloc = ctx_priv->st1_num_taps;
}
if (ctx_priv->st2_num_taps > 0)
st2_mem_alloc = ctx_priv->st2_num_taps;
pf_mem_alloc = st1_mem_alloc + st2_mem_alloc;
if (pf_mem_alloc != 0)
channels = (6144 - slot->pf_mem_used) / pf_mem_alloc;
else
channels = 8;
if (channels < max_channels)
max_channels = channels;
return max_channels;
}
static int fsl_easrc_config_one_slot(struct fsl_asrc_pair *ctx,
struct fsl_easrc_slot *slot,
unsigned int slot_ctx_idx,
unsigned int *req_channels,
unsigned int *start_channel,
unsigned int *avail_channel)
{
struct fsl_asrc *easrc = ctx->asrc;
struct fsl_easrc_ctx_priv *ctx_priv = ctx->private;
int st1_chanxexp, st1_mem_alloc = 0, st2_mem_alloc;
unsigned int reg0, reg1, reg2, reg3;
unsigned int addr;
if (slot->slot_index == 0) {
reg0 = REG_EASRC_DPCS0R0(slot_ctx_idx);
reg1 = REG_EASRC_DPCS0R1(slot_ctx_idx);
reg2 = REG_EASRC_DPCS0R2(slot_ctx_idx);
reg3 = REG_EASRC_DPCS0R3(slot_ctx_idx);
} else {
reg0 = REG_EASRC_DPCS1R0(slot_ctx_idx);
reg1 = REG_EASRC_DPCS1R1(slot_ctx_idx);
reg2 = REG_EASRC_DPCS1R2(slot_ctx_idx);
reg3 = REG_EASRC_DPCS1R3(slot_ctx_idx);
}
if (*req_channels <= *avail_channel) {
slot->num_channel = *req_channels;
*req_channels = 0;
} else {
slot->num_channel = *avail_channel;
*req_channels -= *avail_channel;
}
slot->min_channel = *start_channel;
slot->max_channel = *start_channel + slot->num_channel - 1;
slot->ctx_index = ctx->index;
slot->busy = true;
*start_channel += slot->num_channel;
regmap_update_bits(easrc->regmap, reg0,
EASRC_DPCS0R0_MAXCH_MASK,
EASRC_DPCS0R0_MAXCH(slot->max_channel));
regmap_update_bits(easrc->regmap, reg0,
EASRC_DPCS0R0_MINCH_MASK,
EASRC_DPCS0R0_MINCH(slot->min_channel));
regmap_update_bits(easrc->regmap, reg0,
EASRC_DPCS0R0_NUMCH_MASK,
EASRC_DPCS0R0_NUMCH(slot->num_channel - 1));
regmap_update_bits(easrc->regmap, reg0,
EASRC_DPCS0R0_CTXNUM_MASK,
EASRC_DPCS0R0_CTXNUM(slot->ctx_index));
if (ctx_priv->st1_num_taps > 0) {
if (ctx_priv->st2_num_taps > 0)
st1_mem_alloc =
(ctx_priv->st1_num_taps - 1) * slot->num_channel *
ctx_priv->st1_num_exp + slot->num_channel;
else
st1_mem_alloc = ctx_priv->st1_num_taps * slot->num_channel;
slot->pf_mem_used = st1_mem_alloc;
regmap_update_bits(easrc->regmap, reg2,
EASRC_DPCS0R2_ST1_MA_MASK,
EASRC_DPCS0R2_ST1_MA(st1_mem_alloc));
if (slot->slot_index == 1)
addr = PREFILTER_MEM_LEN - st1_mem_alloc;
else
addr = 0;
regmap_update_bits(easrc->regmap, reg2,
EASRC_DPCS0R2_ST1_SA_MASK,
EASRC_DPCS0R2_ST1_SA(addr));
}
if (ctx_priv->st2_num_taps > 0) {
st1_chanxexp = slot->num_channel * (ctx_priv->st1_num_exp - 1);
regmap_update_bits(easrc->regmap, reg1,
EASRC_DPCS0R1_ST1_EXP_MASK,
EASRC_DPCS0R1_ST1_EXP(st1_chanxexp));
st2_mem_alloc = slot->num_channel * ctx_priv->st2_num_taps;
slot->pf_mem_used += st2_mem_alloc;
regmap_update_bits(easrc->regmap, reg3,
EASRC_DPCS0R3_ST2_MA_MASK,
EASRC_DPCS0R3_ST2_MA(st2_mem_alloc));
if (slot->slot_index == 1)
addr = PREFILTER_MEM_LEN - st1_mem_alloc - st2_mem_alloc;
else
addr = st1_mem_alloc;
regmap_update_bits(easrc->regmap, reg3,
EASRC_DPCS0R3_ST2_SA_MASK,
EASRC_DPCS0R3_ST2_SA(addr));
}
regmap_update_bits(easrc->regmap, reg0,
EASRC_DPCS0R0_EN_MASK, EASRC_DPCS0R0_EN);
return 0;
}
/*
* fsl_easrc_config_slot
*
* A single context can be split amongst any of the 4 context processing pipes
* in the design.
* The total number of channels consumed within the context processor must be
* less than or equal to 8. if a single context is configured to contain more
* than 8 channels then it must be distributed across multiple context
* processing pipe slots.
*
*/
static int fsl_easrc_config_slot(struct fsl_asrc *easrc, unsigned int ctx_id)
{
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct fsl_asrc_pair *ctx = easrc->pair[ctx_id];
int req_channels = ctx->channels;
int start_channel = 0, avail_channel;
struct fsl_easrc_slot *slot0, *slot1;
struct fsl_easrc_slot *slota, *slotb;
int i, ret;
if (req_channels <= 0)
return -EINVAL;
for (i = 0; i < EASRC_CTX_MAX_NUM; i++) {
slot0 = &easrc_priv->slot[i][0];
slot1 = &easrc_priv->slot[i][1];
if (slot0->busy && slot1->busy) {
continue;
} else if ((slot0->busy && slot0->ctx_index == ctx->index) ||
(slot1->busy && slot1->ctx_index == ctx->index)) {
continue;
} else if (!slot0->busy) {
slota = slot0;
slotb = slot1;
slota->slot_index = 0;
} else if (!slot1->busy) {
slota = slot1;
slotb = slot0;
slota->slot_index = 1;
}
if (!slota || !slotb)
continue;
avail_channel = fsl_easrc_max_ch_for_slot(ctx, slotb);
if (avail_channel <= 0)
continue;
ret = fsl_easrc_config_one_slot(ctx, slota, i, &req_channels,
&start_channel, &avail_channel);
if (ret)
return ret;
if (req_channels > 0)
continue;
else
break;
}
if (req_channels > 0) {
dev_err(&easrc->pdev->dev, "no avail slot.\n");
return -EINVAL;
}
return 0;
}
/*
* fsl_easrc_release_slot
*
* Clear the slot configuration
*/
static int fsl_easrc_release_slot(struct fsl_asrc *easrc, unsigned int ctx_id)
{
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct fsl_asrc_pair *ctx = easrc->pair[ctx_id];
int i;
for (i = 0; i < EASRC_CTX_MAX_NUM; i++) {
if (easrc_priv->slot[i][0].busy &&
easrc_priv->slot[i][0].ctx_index == ctx->index) {
easrc_priv->slot[i][0].busy = false;
easrc_priv->slot[i][0].num_channel = 0;
easrc_priv->slot[i][0].pf_mem_used = 0;
/* set registers */
regmap_write(easrc->regmap, REG_EASRC_DPCS0R0(i), 0);
regmap_write(easrc->regmap, REG_EASRC_DPCS0R1(i), 0);
regmap_write(easrc->regmap, REG_EASRC_DPCS0R2(i), 0);
regmap_write(easrc->regmap, REG_EASRC_DPCS0R3(i), 0);
}
if (easrc_priv->slot[i][1].busy &&
easrc_priv->slot[i][1].ctx_index == ctx->index) {
easrc_priv->slot[i][1].busy = false;
easrc_priv->slot[i][1].num_channel = 0;
easrc_priv->slot[i][1].pf_mem_used = 0;
/* set registers */
regmap_write(easrc->regmap, REG_EASRC_DPCS1R0(i), 0);
regmap_write(easrc->regmap, REG_EASRC_DPCS1R1(i), 0);
regmap_write(easrc->regmap, REG_EASRC_DPCS1R2(i), 0);
regmap_write(easrc->regmap, REG_EASRC_DPCS1R3(i), 0);
}
}
return 0;
}
/*
* fsl_easrc_config_context
*
* Configure the register relate with context.
*/
static int fsl_easrc_config_context(struct fsl_asrc *easrc, unsigned int ctx_id)
{
struct fsl_easrc_ctx_priv *ctx_priv;
struct fsl_asrc_pair *ctx;
struct device *dev;
unsigned long lock_flags;
int ret;
if (!easrc)
return -ENODEV;
dev = &easrc->pdev->dev;
if (ctx_id >= EASRC_CTX_MAX_NUM) {
dev_err(dev, "Invalid context id[%d]\n", ctx_id);
return -EINVAL;
}
ctx = easrc->pair[ctx_id];
ctx_priv = ctx->private;
fsl_easrc_normalize_rates(ctx);
ret = fsl_easrc_set_rs_ratio(ctx);
if (ret)
return ret;
/* Initialize the context coeficients */
ret = fsl_easrc_prefilter_config(easrc, ctx->index);
if (ret)
return ret;
spin_lock_irqsave(&easrc->lock, lock_flags);
ret = fsl_easrc_config_slot(easrc, ctx->index);
spin_unlock_irqrestore(&easrc->lock, lock_flags);
if (ret)
return ret;
/*
* Both prefilter and resampling filters can use following
* initialization modes:
* 2 - zero-fil mode
* 1 - replication mode
* 0 - software control
*/
regmap_update_bits(easrc->regmap, REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_RS_INIT_MASK,
EASRC_CCE1_RS_INIT(ctx_priv->rs_init_mode));
regmap_update_bits(easrc->regmap, REG_EASRC_CCE1(ctx_id),
EASRC_CCE1_PF_INIT_MASK,
EASRC_CCE1_PF_INIT(ctx_priv->pf_init_mode));
/*
* Context Input FIFO Watermark
* DMA request is generated when input FIFO < FIFO_WTMK
*/
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx_id),
EASRC_CC_FIFO_WTMK_MASK,
EASRC_CC_FIFO_WTMK(ctx_priv->in_params.fifo_wtmk));
/*
* Context Output FIFO Watermark
* DMA request is generated when output FIFO > FIFO_WTMK
* So we set fifo_wtmk -1 to register.
*/
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx_id),
EASRC_COC_FIFO_WTMK_MASK,
EASRC_COC_FIFO_WTMK(ctx_priv->out_params.fifo_wtmk - 1));
/* Number of channels */
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx_id),
EASRC_CC_CHEN_MASK,
EASRC_CC_CHEN(ctx->channels - 1));
return 0;
}
static int fsl_easrc_process_format(struct fsl_asrc_pair *ctx,
struct fsl_easrc_data_fmt *fmt,
snd_pcm_format_t raw_fmt)
{
struct fsl_asrc *easrc = ctx->asrc;
struct fsl_easrc_priv *easrc_priv = easrc->private;
int ret;
if (!fmt)
return -EINVAL;
/*
* Context Input Floating Point Format
* 0 - Integer Format
* 1 - Single Precision FP Format
*/
fmt->floating_point = !snd_pcm_format_linear(raw_fmt);
fmt->sample_pos = 0;
fmt->iec958 = 0;
/* Get the data width */
switch (snd_pcm_format_width(raw_fmt)) {
case 16:
fmt->width = EASRC_WIDTH_16_BIT;
fmt->addexp = 15;
break;
case 20:
fmt->width = EASRC_WIDTH_20_BIT;
fmt->addexp = 19;
break;
case 24:
fmt->width = EASRC_WIDTH_24_BIT;
fmt->addexp = 23;
break;
case 32:
fmt->width = EASRC_WIDTH_32_BIT;
fmt->addexp = 31;
break;
default:
return -EINVAL;
}
switch (raw_fmt) {
case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE:
fmt->width = easrc_priv->bps_iec958[ctx->index];
fmt->iec958 = 1;
fmt->floating_point = 0;
if (fmt->width == EASRC_WIDTH_16_BIT) {
fmt->sample_pos = 12;
fmt->addexp = 15;
} else if (fmt->width == EASRC_WIDTH_20_BIT) {
fmt->sample_pos = 8;
fmt->addexp = 19;
} else if (fmt->width == EASRC_WIDTH_24_BIT) {
fmt->sample_pos = 4;
fmt->addexp = 23;
}
break;
default:
break;
}
/*
* Data Endianness
* 0 - Little-Endian
* 1 - Big-Endian
*/
ret = snd_pcm_format_big_endian(raw_fmt);
if (ret < 0)
return ret;
fmt->endianness = ret;
/*
* Input Data sign
* 0b - Signed Format
* 1b - Unsigned Format
*/
fmt->unsign = snd_pcm_format_unsigned(raw_fmt) > 0 ? 1 : 0;
return 0;
}
static int fsl_easrc_set_ctx_format(struct fsl_asrc_pair *ctx,
snd_pcm_format_t *in_raw_format,
snd_pcm_format_t *out_raw_format)
{
struct fsl_asrc *easrc = ctx->asrc;
struct fsl_easrc_ctx_priv *ctx_priv = ctx->private;
struct fsl_easrc_data_fmt *in_fmt = &ctx_priv->in_params.fmt;
struct fsl_easrc_data_fmt *out_fmt = &ctx_priv->out_params.fmt;
int ret = 0;
/* Get the bitfield values for input data format */
if (in_raw_format && out_raw_format) {
ret = fsl_easrc_process_format(ctx, in_fmt, *in_raw_format);
if (ret)
return ret;
}
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_BPS_MASK,
EASRC_CC_BPS(in_fmt->width));
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_ENDIANNESS_MASK,
in_fmt->endianness << EASRC_CC_ENDIANNESS_SHIFT);
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_FMT_MASK,
in_fmt->floating_point << EASRC_CC_FMT_SHIFT);
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_INSIGN_MASK,
in_fmt->unsign << EASRC_CC_INSIGN_SHIFT);
/* In Sample Position */
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_SAMPLE_POS_MASK,
EASRC_CC_SAMPLE_POS(in_fmt->sample_pos));
/* Get the bitfield values for input data format */
if (in_raw_format && out_raw_format) {
ret = fsl_easrc_process_format(ctx, out_fmt, *out_raw_format);
if (ret)
return ret;
}
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_BPS_MASK,
EASRC_COC_BPS(out_fmt->width));
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_ENDIANNESS_MASK,
out_fmt->endianness << EASRC_COC_ENDIANNESS_SHIFT);
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_FMT_MASK,
out_fmt->floating_point << EASRC_COC_FMT_SHIFT);
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_OUTSIGN_MASK,
out_fmt->unsign << EASRC_COC_OUTSIGN_SHIFT);
/* Out Sample Position */
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_SAMPLE_POS_MASK,
EASRC_COC_SAMPLE_POS(out_fmt->sample_pos));
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_IEC_EN_MASK,
out_fmt->iec958 << EASRC_COC_IEC_EN_SHIFT);
return ret;
}
/*
* The ASRC provides interleaving support in hardware to ensure that a
* variety of sample sources can be internally combined
* to conform with this format. Interleaving parameters are accessed
* through the ASRC_CTRL_IN_ACCESSa and ASRC_CTRL_OUT_ACCESSa registers
*/
static int fsl_easrc_set_ctx_organziation(struct fsl_asrc_pair *ctx)
{
struct fsl_easrc_ctx_priv *ctx_priv;
struct fsl_asrc *easrc;
if (!ctx)
return -ENODEV;
easrc = ctx->asrc;
ctx_priv = ctx->private;
/* input interleaving parameters */
regmap_update_bits(easrc->regmap, REG_EASRC_CIA(ctx->index),
EASRC_CIA_ITER_MASK,
EASRC_CIA_ITER(ctx_priv->in_params.iterations));
regmap_update_bits(easrc->regmap, REG_EASRC_CIA(ctx->index),
EASRC_CIA_GRLEN_MASK,
EASRC_CIA_GRLEN(ctx_priv->in_params.group_len));
regmap_update_bits(easrc->regmap, REG_EASRC_CIA(ctx->index),
EASRC_CIA_ACCLEN_MASK,
EASRC_CIA_ACCLEN(ctx_priv->in_params.access_len));
/* output interleaving parameters */
regmap_update_bits(easrc->regmap, REG_EASRC_COA(ctx->index),
EASRC_COA_ITER_MASK,
EASRC_COA_ITER(ctx_priv->out_params.iterations));
regmap_update_bits(easrc->regmap, REG_EASRC_COA(ctx->index),
EASRC_COA_GRLEN_MASK,
EASRC_COA_GRLEN(ctx_priv->out_params.group_len));
regmap_update_bits(easrc->regmap, REG_EASRC_COA(ctx->index),
EASRC_COA_ACCLEN_MASK,
EASRC_COA_ACCLEN(ctx_priv->out_params.access_len));
return 0;
}
/*
* Request one of the available contexts
*
* Returns a negative number on error and >=0 as context id
* on success
*/
static int fsl_easrc_request_context(int channels, struct fsl_asrc_pair *ctx)
{
enum asrc_pair_index index = ASRC_INVALID_PAIR;
struct fsl_asrc *easrc = ctx->asrc;
struct device *dev;
unsigned long lock_flags;
int ret = 0;
int i;
dev = &easrc->pdev->dev;
spin_lock_irqsave(&easrc->lock, lock_flags);
for (i = ASRC_PAIR_A; i < EASRC_CTX_MAX_NUM; i++) {
if (easrc->pair[i])
continue;
index = i;
break;
}
if (index == ASRC_INVALID_PAIR) {
dev_err(dev, "all contexts are busy\n");
ret = -EBUSY;
} else if (channels > easrc->channel_avail) {
dev_err(dev, "can't give the required channels: %d\n",
channels);
ret = -EINVAL;
} else {
ctx->index = index;
ctx->channels = channels;
easrc->pair[index] = ctx;
easrc->channel_avail -= channels;
}
spin_unlock_irqrestore(&easrc->lock, lock_flags);
return ret;
}
/*
* Release the context
*
* This funciton is mainly doing the revert thing in request context
*/
static void fsl_easrc_release_context(struct fsl_asrc_pair *ctx)
{
unsigned long lock_flags;
struct fsl_asrc *easrc;
if (!ctx)
return;
easrc = ctx->asrc;
spin_lock_irqsave(&easrc->lock, lock_flags);
fsl_easrc_release_slot(easrc, ctx->index);
easrc->channel_avail += ctx->channels;
easrc->pair[ctx->index] = NULL;
spin_unlock_irqrestore(&easrc->lock, lock_flags);
}
/*
* Start the context
*
* Enable the DMA request and context
*/
static int fsl_easrc_start_context(struct fsl_asrc_pair *ctx)
{
struct fsl_asrc *easrc = ctx->asrc;
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_FWMDE_MASK, EASRC_CC_FWMDE);
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_FWMDE_MASK, EASRC_COC_FWMDE);
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_EN_MASK, EASRC_CC_EN);
return 0;
}
/*
* Stop the context
*
* Disable the DMA request and context
*/
static int fsl_easrc_stop_context(struct fsl_asrc_pair *ctx)
{
struct fsl_asrc *easrc = ctx->asrc;
int val, i;
int size;
int retry = 200;
regmap_read(easrc->regmap, REG_EASRC_CC(ctx->index), &val);
if (val & EASRC_CC_EN_MASK) {
regmap_update_bits(easrc->regmap,
REG_EASRC_CC(ctx->index),
EASRC_CC_STOP_MASK, EASRC_CC_STOP);
do {
regmap_read(easrc->regmap, REG_EASRC_SFS(ctx->index), &val);
val &= EASRC_SFS_NSGO_MASK;
size = val >> EASRC_SFS_NSGO_SHIFT;
/* Read FIFO, drop the data */
for (i = 0; i < size * ctx->channels; i++)
regmap_read(easrc->regmap, REG_EASRC_RDFIFO(ctx->index), &val);
/* Check RUN_STOP_DONE */
regmap_read(easrc->regmap, REG_EASRC_IRQF, &val);
if (val & EASRC_IRQF_RSD(1 << ctx->index)) {
/*Clear RUN_STOP_DONE*/
regmap_write_bits(easrc->regmap,
REG_EASRC_IRQF,
EASRC_IRQF_RSD(1 << ctx->index),
EASRC_IRQF_RSD(1 << ctx->index));
break;
}
udelay(100);
} while (--retry);
if (retry == 0)
dev_warn(&easrc->pdev->dev, "RUN STOP fail\n");
}
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_EN_MASK | EASRC_CC_STOP_MASK, 0);
regmap_update_bits(easrc->regmap, REG_EASRC_CC(ctx->index),
EASRC_CC_FWMDE_MASK, 0);
regmap_update_bits(easrc->regmap, REG_EASRC_COC(ctx->index),
EASRC_COC_FWMDE_MASK, 0);
return 0;
}
static struct dma_chan *fsl_easrc_get_dma_channel(struct fsl_asrc_pair *ctx,
bool dir)
{
struct fsl_asrc *easrc = ctx->asrc;
enum asrc_pair_index index = ctx->index;
char name[8];
/* Example of dma name: ctx0_rx */
sprintf(name, "ctx%c_%cx", index + '0', dir == IN ? 'r' : 't');
return dma_request_slave_channel(&easrc->pdev->dev, name);
};
static const unsigned int easrc_rates[] = {
8000, 11025, 12000, 16000,
22050, 24000, 32000, 44100,
48000, 64000, 88200, 96000,
128000, 176400, 192000, 256000,
352800, 384000, 705600, 768000,
};
static const struct snd_pcm_hw_constraint_list easrc_rate_constraints = {
.count = ARRAY_SIZE(easrc_rates),
.list = easrc_rates,
};
static int fsl_easrc_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&easrc_rate_constraints);
}
static int fsl_easrc_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct fsl_asrc_pair *ctx = runtime->private_data;
int ret;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ret = fsl_easrc_start_context(ctx);
if (ret)
return ret;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ret = fsl_easrc_stop_context(ctx);
if (ret)
return ret;
break;
default:
return -EINVAL;
}
return 0;
}
static int fsl_easrc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct fsl_asrc *easrc = snd_soc_dai_get_drvdata(dai);
struct snd_pcm_runtime *runtime = substream->runtime;
struct device *dev = &easrc->pdev->dev;
struct fsl_asrc_pair *ctx = runtime->private_data;
struct fsl_easrc_ctx_priv *ctx_priv = ctx->private;
unsigned int channels = params_channels(params);
unsigned int rate = params_rate(params);
snd_pcm_format_t format = params_format(params);
int ret;
ret = fsl_easrc_request_context(channels, ctx);
if (ret) {
dev_err(dev, "failed to request context\n");
return ret;
}
ctx_priv->ctx_streams |= BIT(substream->stream);
/*
* Set the input and output ratio so we can compute
* the resampling ratio in RS_LOW/HIGH
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ctx_priv->in_params.sample_rate = rate;
ctx_priv->in_params.sample_format = format;
ctx_priv->out_params.sample_rate = easrc->asrc_rate;
ctx_priv->out_params.sample_format = easrc->asrc_format;
} else {
ctx_priv->out_params.sample_rate = rate;
ctx_priv->out_params.sample_format = format;
ctx_priv->in_params.sample_rate = easrc->asrc_rate;
ctx_priv->in_params.sample_format = easrc->asrc_format;
}
ctx->channels = channels;
ctx_priv->in_params.fifo_wtmk = 0x20;
ctx_priv->out_params.fifo_wtmk = 0x20;
/*
* Do only rate conversion and keep the same format for input
* and output data
*/
ret = fsl_easrc_set_ctx_format(ctx,
&ctx_priv->in_params.sample_format,
&ctx_priv->out_params.sample_format);
if (ret) {
dev_err(dev, "failed to set format %d", ret);
return ret;
}
ret = fsl_easrc_config_context(easrc, ctx->index);
if (ret) {
dev_err(dev, "failed to config context\n");
return ret;
}
ctx_priv->in_params.iterations = 1;
ctx_priv->in_params.group_len = ctx->channels;
ctx_priv->in_params.access_len = ctx->channels;
ctx_priv->out_params.iterations = 1;
ctx_priv->out_params.group_len = ctx->channels;
ctx_priv->out_params.access_len = ctx->channels;
ret = fsl_easrc_set_ctx_organziation(ctx);
if (ret) {
dev_err(dev, "failed to set fifo organization\n");
return ret;
}
return 0;
}
static int fsl_easrc_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct fsl_asrc_pair *ctx = runtime->private_data;
struct fsl_easrc_ctx_priv *ctx_priv;
if (!ctx)
return -EINVAL;
ctx_priv = ctx->private;
if (ctx_priv->ctx_streams & BIT(substream->stream)) {
ctx_priv->ctx_streams &= ~BIT(substream->stream);
fsl_easrc_release_context(ctx);
}
return 0;
}
static const struct snd_soc_dai_ops fsl_easrc_dai_ops = {
.startup = fsl_easrc_startup,
.trigger = fsl_easrc_trigger,
.hw_params = fsl_easrc_hw_params,
.hw_free = fsl_easrc_hw_free,
};
static int fsl_easrc_dai_probe(struct snd_soc_dai *cpu_dai)
{
struct fsl_asrc *easrc = dev_get_drvdata(cpu_dai->dev);
snd_soc_dai_init_dma_data(cpu_dai,
&easrc->dma_params_tx,
&easrc->dma_params_rx);
return 0;
}
static struct snd_soc_dai_driver fsl_easrc_dai = {
.probe = fsl_easrc_dai_probe,
.playback = {
.stream_name = "ASRC-Playback",
.channels_min = 1,
.channels_max = 32,
.rate_min = 8000,
.rate_max = 768000,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_EASRC_FORMATS,
},
.capture = {
.stream_name = "ASRC-Capture",
.channels_min = 1,
.channels_max = 32,
.rate_min = 8000,
.rate_max = 768000,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_EASRC_FORMATS |
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
},
.ops = &fsl_easrc_dai_ops,
};
static const struct snd_soc_component_driver fsl_easrc_component = {
.name = "fsl-easrc-dai",
.controls = fsl_easrc_snd_controls,
.num_controls = ARRAY_SIZE(fsl_easrc_snd_controls),
.legacy_dai_naming = 1,
};
static const struct reg_default fsl_easrc_reg_defaults[] = {
{REG_EASRC_WRFIFO(0), 0x00000000},
{REG_EASRC_WRFIFO(1), 0x00000000},
{REG_EASRC_WRFIFO(2), 0x00000000},
{REG_EASRC_WRFIFO(3), 0x00000000},
{REG_EASRC_RDFIFO(0), 0x00000000},
{REG_EASRC_RDFIFO(1), 0x00000000},
{REG_EASRC_RDFIFO(2), 0x00000000},
{REG_EASRC_RDFIFO(3), 0x00000000},
{REG_EASRC_CC(0), 0x00000000},
{REG_EASRC_CC(1), 0x00000000},
{REG_EASRC_CC(2), 0x00000000},
{REG_EASRC_CC(3), 0x00000000},
{REG_EASRC_CCE1(0), 0x00000000},
{REG_EASRC_CCE1(1), 0x00000000},
{REG_EASRC_CCE1(2), 0x00000000},
{REG_EASRC_CCE1(3), 0x00000000},
{REG_EASRC_CCE2(0), 0x00000000},
{REG_EASRC_CCE2(1), 0x00000000},
{REG_EASRC_CCE2(2), 0x00000000},
{REG_EASRC_CCE2(3), 0x00000000},
{REG_EASRC_CIA(0), 0x00000000},
{REG_EASRC_CIA(1), 0x00000000},
{REG_EASRC_CIA(2), 0x00000000},
{REG_EASRC_CIA(3), 0x00000000},
{REG_EASRC_DPCS0R0(0), 0x00000000},
{REG_EASRC_DPCS0R0(1), 0x00000000},
{REG_EASRC_DPCS0R0(2), 0x00000000},
{REG_EASRC_DPCS0R0(3), 0x00000000},
{REG_EASRC_DPCS0R1(0), 0x00000000},
{REG_EASRC_DPCS0R1(1), 0x00000000},
{REG_EASRC_DPCS0R1(2), 0x00000000},
{REG_EASRC_DPCS0R1(3), 0x00000000},
{REG_EASRC_DPCS0R2(0), 0x00000000},
{REG_EASRC_DPCS0R2(1), 0x00000000},
{REG_EASRC_DPCS0R2(2), 0x00000000},
{REG_EASRC_DPCS0R2(3), 0x00000000},
{REG_EASRC_DPCS0R3(0), 0x00000000},
{REG_EASRC_DPCS0R3(1), 0x00000000},
{REG_EASRC_DPCS0R3(2), 0x00000000},
{REG_EASRC_DPCS0R3(3), 0x00000000},
{REG_EASRC_DPCS1R0(0), 0x00000000},
{REG_EASRC_DPCS1R0(1), 0x00000000},
{REG_EASRC_DPCS1R0(2), 0x00000000},
{REG_EASRC_DPCS1R0(3), 0x00000000},
{REG_EASRC_DPCS1R1(0), 0x00000000},
{REG_EASRC_DPCS1R1(1), 0x00000000},
{REG_EASRC_DPCS1R1(2), 0x00000000},
{REG_EASRC_DPCS1R1(3), 0x00000000},
{REG_EASRC_DPCS1R2(0), 0x00000000},
{REG_EASRC_DPCS1R2(1), 0x00000000},
{REG_EASRC_DPCS1R2(2), 0x00000000},
{REG_EASRC_DPCS1R2(3), 0x00000000},
{REG_EASRC_DPCS1R3(0), 0x00000000},
{REG_EASRC_DPCS1R3(1), 0x00000000},
{REG_EASRC_DPCS1R3(2), 0x00000000},
{REG_EASRC_DPCS1R3(3), 0x00000000},
{REG_EASRC_COC(0), 0x00000000},
{REG_EASRC_COC(1), 0x00000000},
{REG_EASRC_COC(2), 0x00000000},
{REG_EASRC_COC(3), 0x00000000},
{REG_EASRC_COA(0), 0x00000000},
{REG_EASRC_COA(1), 0x00000000},
{REG_EASRC_COA(2), 0x00000000},
{REG_EASRC_COA(3), 0x00000000},
{REG_EASRC_SFS(0), 0x00000000},
{REG_EASRC_SFS(1), 0x00000000},
{REG_EASRC_SFS(2), 0x00000000},
{REG_EASRC_SFS(3), 0x00000000},
{REG_EASRC_RRL(0), 0x00000000},
{REG_EASRC_RRL(1), 0x00000000},
{REG_EASRC_RRL(2), 0x00000000},
{REG_EASRC_RRL(3), 0x00000000},
{REG_EASRC_RRH(0), 0x00000000},
{REG_EASRC_RRH(1), 0x00000000},
{REG_EASRC_RRH(2), 0x00000000},
{REG_EASRC_RRH(3), 0x00000000},
{REG_EASRC_RUC(0), 0x00000000},
{REG_EASRC_RUC(1), 0x00000000},
{REG_EASRC_RUC(2), 0x00000000},
{REG_EASRC_RUC(3), 0x00000000},
{REG_EASRC_RUR(0), 0x7FFFFFFF},
{REG_EASRC_RUR(1), 0x7FFFFFFF},
{REG_EASRC_RUR(2), 0x7FFFFFFF},
{REG_EASRC_RUR(3), 0x7FFFFFFF},
{REG_EASRC_RCTCL, 0x00000000},
{REG_EASRC_RCTCH, 0x00000000},
{REG_EASRC_PCF(0), 0x00000000},
{REG_EASRC_PCF(1), 0x00000000},
{REG_EASRC_PCF(2), 0x00000000},
{REG_EASRC_PCF(3), 0x00000000},
{REG_EASRC_CRCM, 0x00000000},
{REG_EASRC_CRCC, 0x00000000},
{REG_EASRC_IRQC, 0x00000FFF},
{REG_EASRC_IRQF, 0x00000000},
{REG_EASRC_CS0(0), 0x00000000},
{REG_EASRC_CS0(1), 0x00000000},
{REG_EASRC_CS0(2), 0x00000000},
{REG_EASRC_CS0(3), 0x00000000},
{REG_EASRC_CS1(0), 0x00000000},
{REG_EASRC_CS1(1), 0x00000000},
{REG_EASRC_CS1(2), 0x00000000},
{REG_EASRC_CS1(3), 0x00000000},
{REG_EASRC_CS2(0), 0x00000000},
{REG_EASRC_CS2(1), 0x00000000},
{REG_EASRC_CS2(2), 0x00000000},
{REG_EASRC_CS2(3), 0x00000000},
{REG_EASRC_CS3(0), 0x00000000},
{REG_EASRC_CS3(1), 0x00000000},
{REG_EASRC_CS3(2), 0x00000000},
{REG_EASRC_CS3(3), 0x00000000},
{REG_EASRC_CS4(0), 0x00000000},
{REG_EASRC_CS4(1), 0x00000000},
{REG_EASRC_CS4(2), 0x00000000},
{REG_EASRC_CS4(3), 0x00000000},
{REG_EASRC_CS5(0), 0x00000000},
{REG_EASRC_CS5(1), 0x00000000},
{REG_EASRC_CS5(2), 0x00000000},
{REG_EASRC_CS5(3), 0x00000000},
{REG_EASRC_DBGC, 0x00000000},
{REG_EASRC_DBGS, 0x00000000},
};
static const struct regmap_range fsl_easrc_readable_ranges[] = {
regmap_reg_range(REG_EASRC_RDFIFO(0), REG_EASRC_RCTCH),
regmap_reg_range(REG_EASRC_PCF(0), REG_EASRC_PCF(3)),
regmap_reg_range(REG_EASRC_CRCC, REG_EASRC_DBGS),
};
static const struct regmap_access_table fsl_easrc_readable_table = {
.yes_ranges = fsl_easrc_readable_ranges,
.n_yes_ranges = ARRAY_SIZE(fsl_easrc_readable_ranges),
};
static const struct regmap_range fsl_easrc_writeable_ranges[] = {
regmap_reg_range(REG_EASRC_WRFIFO(0), REG_EASRC_WRFIFO(3)),
regmap_reg_range(REG_EASRC_CC(0), REG_EASRC_COA(3)),
regmap_reg_range(REG_EASRC_RRL(0), REG_EASRC_RCTCH),
regmap_reg_range(REG_EASRC_PCF(0), REG_EASRC_DBGC),
};
static const struct regmap_access_table fsl_easrc_writeable_table = {
.yes_ranges = fsl_easrc_writeable_ranges,
.n_yes_ranges = ARRAY_SIZE(fsl_easrc_writeable_ranges),
};
static const struct regmap_range fsl_easrc_volatileable_ranges[] = {
regmap_reg_range(REG_EASRC_RDFIFO(0), REG_EASRC_RDFIFO(3)),
regmap_reg_range(REG_EASRC_SFS(0), REG_EASRC_SFS(3)),
regmap_reg_range(REG_EASRC_IRQF, REG_EASRC_IRQF),
regmap_reg_range(REG_EASRC_DBGS, REG_EASRC_DBGS),
};
static const struct regmap_access_table fsl_easrc_volatileable_table = {
.yes_ranges = fsl_easrc_volatileable_ranges,
.n_yes_ranges = ARRAY_SIZE(fsl_easrc_volatileable_ranges),
};
static const struct regmap_config fsl_easrc_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = REG_EASRC_DBGS,
.reg_defaults = fsl_easrc_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(fsl_easrc_reg_defaults),
.rd_table = &fsl_easrc_readable_table,
.wr_table = &fsl_easrc_writeable_table,
.volatile_table = &fsl_easrc_volatileable_table,
.cache_type = REGCACHE_RBTREE,
};
#ifdef DEBUG
static void fsl_easrc_dump_firmware(struct fsl_asrc *easrc)
{
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct asrc_firmware_hdr *firm = easrc_priv->firmware_hdr;
struct interp_params *interp = easrc_priv->interp;
struct prefil_params *prefil = easrc_priv->prefil;
struct device *dev = &easrc->pdev->dev;
int i;
if (firm->magic != FIRMWARE_MAGIC) {
dev_err(dev, "Wrong magic. Something went wrong!");
return;
}
dev_dbg(dev, "Firmware v%u dump:\n", firm->firmware_version);
dev_dbg(dev, "Num prefilter scenarios: %u\n", firm->prefil_scen);
dev_dbg(dev, "Num interpolation scenarios: %u\n", firm->interp_scen);
dev_dbg(dev, "\nInterpolation scenarios:\n");
for (i = 0; i < firm->interp_scen; i++) {
if (interp[i].magic != FIRMWARE_MAGIC) {
dev_dbg(dev, "%d. wrong interp magic: %x\n",
i, interp[i].magic);
continue;
}
dev_dbg(dev, "%d. taps: %u, phases: %u, center: %llu\n", i,
interp[i].num_taps, interp[i].num_phases,
interp[i].center_tap);
}
for (i = 0; i < firm->prefil_scen; i++) {
if (prefil[i].magic != FIRMWARE_MAGIC) {
dev_dbg(dev, "%d. wrong prefil magic: %x\n",
i, prefil[i].magic);
continue;
}
dev_dbg(dev, "%d. insr: %u, outsr: %u, st1: %u, st2: %u\n", i,
prefil[i].insr, prefil[i].outsr,
prefil[i].st1_taps, prefil[i].st2_taps);
}
dev_dbg(dev, "end of firmware dump\n");
}
#endif
static int fsl_easrc_get_firmware(struct fsl_asrc *easrc)
{
struct fsl_easrc_priv *easrc_priv;
const struct firmware **fw_p;
u32 pnum, inum, offset;
const u8 *data;
int ret;
if (!easrc)
return -EINVAL;
easrc_priv = easrc->private;
fw_p = &easrc_priv->fw;
ret = request_firmware(fw_p, easrc_priv->fw_name, &easrc->pdev->dev);
if (ret)
return ret;
data = easrc_priv->fw->data;
easrc_priv->firmware_hdr = (struct asrc_firmware_hdr *)data;
pnum = easrc_priv->firmware_hdr->prefil_scen;
inum = easrc_priv->firmware_hdr->interp_scen;
if (inum) {
offset = sizeof(struct asrc_firmware_hdr);
easrc_priv->interp = (struct interp_params *)(data + offset);
}
if (pnum) {
offset = sizeof(struct asrc_firmware_hdr) +
inum * sizeof(struct interp_params);
easrc_priv->prefil = (struct prefil_params *)(data + offset);
}
#ifdef DEBUG
fsl_easrc_dump_firmware(easrc);
#endif
return 0;
}
static irqreturn_t fsl_easrc_isr(int irq, void *dev_id)
{
struct fsl_asrc *easrc = (struct fsl_asrc *)dev_id;
struct device *dev = &easrc->pdev->dev;
int val;
regmap_read(easrc->regmap, REG_EASRC_IRQF, &val);
if (val & EASRC_IRQF_OER_MASK)
dev_dbg(dev, "output FIFO underflow\n");
if (val & EASRC_IRQF_IFO_MASK)
dev_dbg(dev, "input FIFO overflow\n");
return IRQ_HANDLED;
}
static int fsl_easrc_get_fifo_addr(u8 dir, enum asrc_pair_index index)
{
return REG_EASRC_FIFO(dir, index);
}
static const struct of_device_id fsl_easrc_dt_ids[] = {
{ .compatible = "fsl,imx8mn-easrc",},
{}
};
MODULE_DEVICE_TABLE(of, fsl_easrc_dt_ids);
static int fsl_easrc_probe(struct platform_device *pdev)
{
struct fsl_easrc_priv *easrc_priv;
struct device *dev = &pdev->dev;
struct fsl_asrc *easrc;
struct resource *res;
struct device_node *np;
void __iomem *regs;
u32 asrc_fmt = 0;
int ret, irq;
easrc = devm_kzalloc(dev, sizeof(*easrc), GFP_KERNEL);
if (!easrc)
return -ENOMEM;
easrc_priv = devm_kzalloc(dev, sizeof(*easrc_priv), GFP_KERNEL);
if (!easrc_priv)
return -ENOMEM;
easrc->pdev = pdev;
easrc->private = easrc_priv;
np = dev->of_node;
regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(regs))
return PTR_ERR(regs);
easrc->paddr = res->start;
easrc->regmap = devm_regmap_init_mmio(dev, regs, &fsl_easrc_regmap_config);
if (IS_ERR(easrc->regmap)) {
dev_err(dev, "failed to init regmap");
return PTR_ERR(easrc->regmap);
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ret = devm_request_irq(&pdev->dev, irq, fsl_easrc_isr, 0,
dev_name(dev), easrc);
if (ret) {
dev_err(dev, "failed to claim irq %u: %d\n", irq, ret);
return ret;
}
easrc->mem_clk = devm_clk_get(dev, "mem");
if (IS_ERR(easrc->mem_clk)) {
dev_err(dev, "failed to get mem clock\n");
return PTR_ERR(easrc->mem_clk);
}
/* Set default value */
easrc->channel_avail = 32;
easrc->get_dma_channel = fsl_easrc_get_dma_channel;
easrc->request_pair = fsl_easrc_request_context;
easrc->release_pair = fsl_easrc_release_context;
easrc->get_fifo_addr = fsl_easrc_get_fifo_addr;
easrc->pair_priv_size = sizeof(struct fsl_easrc_ctx_priv);
easrc_priv->rs_num_taps = EASRC_RS_32_TAPS;
easrc_priv->const_coeff = 0x3FF0000000000000;
ret = of_property_read_u32(np, "fsl,asrc-rate", &easrc->asrc_rate);
if (ret) {
dev_err(dev, "failed to asrc rate\n");
return ret;
}
ret = of_property_read_u32(np, "fsl,asrc-format", &asrc_fmt);
easrc->asrc_format = (__force snd_pcm_format_t)asrc_fmt;
if (ret) {
dev_err(dev, "failed to asrc format\n");
return ret;
}
if (!(FSL_EASRC_FORMATS & (pcm_format_to_bits(easrc->asrc_format)))) {
dev_warn(dev, "unsupported format, switching to S24_LE\n");
easrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
}
ret = of_property_read_string(np, "firmware-name",
&easrc_priv->fw_name);
if (ret) {
dev_err(dev, "failed to get firmware name\n");
return ret;
}
platform_set_drvdata(pdev, easrc);
pm_runtime_enable(dev);
spin_lock_init(&easrc->lock);
regcache_cache_only(easrc->regmap, true);
ret = devm_snd_soc_register_component(dev, &fsl_easrc_component,
&fsl_easrc_dai, 1);
if (ret) {
dev_err(dev, "failed to register ASoC DAI\n");
return ret;
}
ret = devm_snd_soc_register_component(dev, &fsl_asrc_component,
NULL, 0);
if (ret) {
dev_err(&pdev->dev, "failed to register ASoC platform\n");
return ret;
}
return 0;
}
static void fsl_easrc_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
}
static __maybe_unused int fsl_easrc_runtime_suspend(struct device *dev)
{
struct fsl_asrc *easrc = dev_get_drvdata(dev);
struct fsl_easrc_priv *easrc_priv = easrc->private;
unsigned long lock_flags;
regcache_cache_only(easrc->regmap, true);
clk_disable_unprepare(easrc->mem_clk);
spin_lock_irqsave(&easrc->lock, lock_flags);
easrc_priv->firmware_loaded = 0;
spin_unlock_irqrestore(&easrc->lock, lock_flags);
return 0;
}
static __maybe_unused int fsl_easrc_runtime_resume(struct device *dev)
{
struct fsl_asrc *easrc = dev_get_drvdata(dev);
struct fsl_easrc_priv *easrc_priv = easrc->private;
struct fsl_easrc_ctx_priv *ctx_priv;
struct fsl_asrc_pair *ctx;
unsigned long lock_flags;
int ret;
int i;
ret = clk_prepare_enable(easrc->mem_clk);
if (ret)
return ret;
regcache_cache_only(easrc->regmap, false);
regcache_mark_dirty(easrc->regmap);
regcache_sync(easrc->regmap);
spin_lock_irqsave(&easrc->lock, lock_flags);
if (easrc_priv->firmware_loaded) {
spin_unlock_irqrestore(&easrc->lock, lock_flags);
goto skip_load;
}
easrc_priv->firmware_loaded = 1;
spin_unlock_irqrestore(&easrc->lock, lock_flags);
ret = fsl_easrc_get_firmware(easrc);
if (ret) {
dev_err(dev, "failed to get firmware\n");
goto disable_mem_clk;
}
/*
* Write Resampling Coefficients
* The coefficient RAM must be configured prior to beginning of
* any context processing within the ASRC
*/
ret = fsl_easrc_resampler_config(easrc);
if (ret) {
dev_err(dev, "resampler config failed\n");
goto disable_mem_clk;
}
for (i = ASRC_PAIR_A; i < EASRC_CTX_MAX_NUM; i++) {
ctx = easrc->pair[i];
if (!ctx)
continue;
ctx_priv = ctx->private;
fsl_easrc_set_rs_ratio(ctx);
ctx_priv->out_missed_sample = ctx_priv->in_filled_sample *
ctx_priv->out_params.sample_rate /
ctx_priv->in_params.sample_rate;
if (ctx_priv->in_filled_sample * ctx_priv->out_params.sample_rate
% ctx_priv->in_params.sample_rate != 0)
ctx_priv->out_missed_sample += 1;
ret = fsl_easrc_write_pf_coeff_mem(easrc, i,
ctx_priv->st1_coeff,
ctx_priv->st1_num_taps,
ctx_priv->st1_addexp);
if (ret)
goto disable_mem_clk;
ret = fsl_easrc_write_pf_coeff_mem(easrc, i,
ctx_priv->st2_coeff,
ctx_priv->st2_num_taps,
ctx_priv->st2_addexp);
if (ret)
goto disable_mem_clk;
}
skip_load:
return 0;
disable_mem_clk:
clk_disable_unprepare(easrc->mem_clk);
return ret;
}
static const struct dev_pm_ops fsl_easrc_pm_ops = {
SET_RUNTIME_PM_OPS(fsl_easrc_runtime_suspend,
fsl_easrc_runtime_resume,
NULL)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static struct platform_driver fsl_easrc_driver = {
.probe = fsl_easrc_probe,
.remove_new = fsl_easrc_remove,
.driver = {
.name = "fsl-easrc",
.pm = &fsl_easrc_pm_ops,
.of_match_table = fsl_easrc_dt_ids,
},
};
module_platform_driver(fsl_easrc_driver);
MODULE_DESCRIPTION("NXP Enhanced Asynchronous Sample Rate (eASRC) driver");
MODULE_LICENSE("GPL v2");
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