diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/fsl/fsl_easrc.c | 2108 |
1 files changed, 2108 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_easrc.c b/sound/soc/fsl/fsl_easrc.c new file mode 100644 index 0000000000..ec53bda46a --- /dev/null +++ b/sound/soc/fsl/fsl_easrc.c @@ -0,0 +1,2108 @@ +// 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 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 const struct snd_soc_dai_ops fsl_easrc_dai_ops = { + .probe = fsl_easrc_dai_probe, + .startup = fsl_easrc_startup, + .trigger = fsl_easrc_trigger, + .hw_params = fsl_easrc_hw_params, + .hw_free = fsl_easrc_hw_free, +}; + +static struct snd_soc_dai_driver fsl_easrc_dai = { + .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"); + goto err_pm_disable; + } + + ret = devm_snd_soc_register_component(dev, &fsl_asrc_component, + NULL, 0); + if (ret) { + dev_err(&pdev->dev, "failed to register ASoC platform\n"); + goto err_pm_disable; + } + + return 0; + +err_pm_disable: + pm_runtime_disable(&pdev->dev); + return ret; +} + +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"); |