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-rw-r--r--sound/soc/fsl/fsl_asrc.c1409
1 files changed, 1409 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
new file mode 100644
index 000000000..e16e7b3fa
--- /dev/null
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -0,0 +1,1409 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Freescale ASRC ALSA SoC Digital Audio Interface (DAI) driver
+//
+// Copyright (C) 2014 Freescale Semiconductor, Inc.
+//
+// Author: Nicolin Chen <nicoleotsuka@gmail.com>
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/dma/imx-dma.h>
+#include <linux/pm_runtime.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+
+#include "fsl_asrc.h"
+
+#define IDEAL_RATIO_DECIMAL_DEPTH 26
+#define DIVIDER_NUM 64
+#define INIT_RETRY_NUM 50
+
+#define pair_err(fmt, ...) \
+ dev_err(&asrc->pdev->dev, "Pair %c: " fmt, 'A' + index, ##__VA_ARGS__)
+
+#define pair_dbg(fmt, ...) \
+ dev_dbg(&asrc->pdev->dev, "Pair %c: " fmt, 'A' + index, ##__VA_ARGS__)
+
+#define pair_warn(fmt, ...) \
+ dev_warn(&asrc->pdev->dev, "Pair %c: " fmt, 'A' + index, ##__VA_ARGS__)
+
+/* Corresponding to process_option */
+static unsigned int supported_asrc_rate[] = {
+ 5512, 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000,
+ 64000, 88200, 96000, 128000, 176400, 192000,
+};
+
+static struct snd_pcm_hw_constraint_list fsl_asrc_rate_constraints = {
+ .count = ARRAY_SIZE(supported_asrc_rate),
+ .list = supported_asrc_rate,
+};
+
+/*
+ * The following tables map the relationship between asrc_inclk/asrc_outclk in
+ * fsl_asrc.h and the registers of ASRCSR
+ */
+static unsigned char input_clk_map_imx35[ASRC_CLK_MAP_LEN] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+};
+
+static unsigned char output_clk_map_imx35[ASRC_CLK_MAP_LEN] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+};
+
+/* i.MX53 uses the same map for input and output */
+static unsigned char input_clk_map_imx53[ASRC_CLK_MAP_LEN] = {
+/* 0x0 0x1 0x2 0x3 0x4 0x5 0x6 0x7 0x8 0x9 0xa 0xb 0xc 0xd 0xe 0xf */
+ 0x0, 0x1, 0x2, 0x7, 0x4, 0x5, 0x6, 0x3, 0x8, 0x9, 0xa, 0xb, 0xc, 0xf, 0xe, 0xd,
+ 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
+ 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
+};
+
+static unsigned char output_clk_map_imx53[ASRC_CLK_MAP_LEN] = {
+/* 0x0 0x1 0x2 0x3 0x4 0x5 0x6 0x7 0x8 0x9 0xa 0xb 0xc 0xd 0xe 0xf */
+ 0x8, 0x9, 0xa, 0x7, 0xc, 0x5, 0x6, 0xb, 0x0, 0x1, 0x2, 0x3, 0x4, 0xf, 0xe, 0xd,
+ 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
+ 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7, 0x7,
+};
+
+/*
+ * i.MX8QM/i.MX8QXP uses the same map for input and output.
+ * clk_map_imx8qm[0] is for i.MX8QM asrc0
+ * clk_map_imx8qm[1] is for i.MX8QM asrc1
+ * clk_map_imx8qxp[0] is for i.MX8QXP asrc0
+ * clk_map_imx8qxp[1] is for i.MX8QXP asrc1
+ */
+static unsigned char clk_map_imx8qm[2][ASRC_CLK_MAP_LEN] = {
+ {
+ 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0x0,
+ 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
+ 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf,
+ },
+ {
+ 0xf, 0xf, 0xf, 0xf, 0xf, 0x7, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0x0,
+ 0x0, 0x1, 0x2, 0x3, 0xb, 0xc, 0xf, 0xf, 0xd, 0xe, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf,
+ 0x4, 0x5, 0x6, 0xf, 0x8, 0x9, 0xa, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf,
+ },
+};
+
+static unsigned char clk_map_imx8qxp[2][ASRC_CLK_MAP_LEN] = {
+ {
+ 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0x0,
+ 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0xf, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xf, 0xf,
+ 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf,
+ },
+ {
+ 0xf, 0xf, 0xf, 0xf, 0xf, 0x7, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0x0,
+ 0x0, 0x1, 0x2, 0x3, 0x7, 0x8, 0xf, 0xf, 0x9, 0xa, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf,
+ 0xf, 0xf, 0x6, 0xf, 0xf, 0xf, 0xa, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf,
+ },
+};
+
+/*
+ * According to RM, the divider range is 1 ~ 8,
+ * prescaler is power of 2 from 1 ~ 128.
+ */
+static int asrc_clk_divider[DIVIDER_NUM] = {
+ 1, 2, 4, 8, 16, 32, 64, 128, /* divider = 1 */
+ 2, 4, 8, 16, 32, 64, 128, 256, /* divider = 2 */
+ 3, 6, 12, 24, 48, 96, 192, 384, /* divider = 3 */
+ 4, 8, 16, 32, 64, 128, 256, 512, /* divider = 4 */
+ 5, 10, 20, 40, 80, 160, 320, 640, /* divider = 5 */
+ 6, 12, 24, 48, 96, 192, 384, 768, /* divider = 6 */
+ 7, 14, 28, 56, 112, 224, 448, 896, /* divider = 7 */
+ 8, 16, 32, 64, 128, 256, 512, 1024, /* divider = 8 */
+};
+
+/*
+ * Check if the divider is available for internal ratio mode
+ */
+static bool fsl_asrc_divider_avail(int clk_rate, int rate, int *div)
+{
+ u32 rem, i;
+ u64 n;
+
+ if (div)
+ *div = 0;
+
+ if (clk_rate == 0 || rate == 0)
+ return false;
+
+ n = clk_rate;
+ rem = do_div(n, rate);
+
+ if (div)
+ *div = n;
+
+ if (rem != 0)
+ return false;
+
+ for (i = 0; i < DIVIDER_NUM; i++) {
+ if (n == asrc_clk_divider[i])
+ break;
+ }
+
+ if (i == DIVIDER_NUM)
+ return false;
+
+ return true;
+}
+
+/**
+ * fsl_asrc_sel_proc - Select the pre-processing and post-processing options
+ * @inrate: input sample rate
+ * @outrate: output sample rate
+ * @pre_proc: return value for pre-processing option
+ * @post_proc: return value for post-processing option
+ *
+ * Make sure to exclude following unsupported cases before
+ * calling this function:
+ * 1) inrate > 8.125 * outrate
+ * 2) inrate > 16.125 * outrate
+ *
+ */
+static void fsl_asrc_sel_proc(int inrate, int outrate,
+ int *pre_proc, int *post_proc)
+{
+ bool post_proc_cond2;
+ bool post_proc_cond0;
+
+ /* select pre_proc between [0, 2] */
+ if (inrate * 8 > 33 * outrate)
+ *pre_proc = 2;
+ else if (inrate * 8 > 15 * outrate) {
+ if (inrate > 152000)
+ *pre_proc = 2;
+ else
+ *pre_proc = 1;
+ } else if (inrate < 76000)
+ *pre_proc = 0;
+ else if (inrate > 152000)
+ *pre_proc = 2;
+ else
+ *pre_proc = 1;
+
+ /* Condition for selection of post-processing */
+ post_proc_cond2 = (inrate * 15 > outrate * 16 && outrate < 56000) ||
+ (inrate > 56000 && outrate < 56000);
+ post_proc_cond0 = inrate * 23 < outrate * 8;
+
+ if (post_proc_cond2)
+ *post_proc = 2;
+ else if (post_proc_cond0)
+ *post_proc = 0;
+ else
+ *post_proc = 1;
+}
+
+/**
+ * fsl_asrc_request_pair - Request ASRC pair
+ * @channels: number of channels
+ * @pair: pointer to pair
+ *
+ * It assigns pair by the order of A->C->B because allocation of pair B,
+ * within range [ANCA, ANCA+ANCB-1], depends on the channels of pair A
+ * while pair A and pair C are comparatively independent.
+ */
+static int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair)
+{
+ enum asrc_pair_index index = ASRC_INVALID_PAIR;
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+ unsigned long lock_flags;
+ int i, ret = 0;
+
+ spin_lock_irqsave(&asrc->lock, lock_flags);
+
+ for (i = ASRC_PAIR_A; i < ASRC_PAIR_MAX_NUM; i++) {
+ if (asrc->pair[i] != NULL)
+ continue;
+
+ index = i;
+
+ if (i != ASRC_PAIR_B)
+ break;
+ }
+
+ if (index == ASRC_INVALID_PAIR) {
+ dev_err(dev, "all pairs are busy now\n");
+ ret = -EBUSY;
+ } else if (asrc->channel_avail < channels) {
+ dev_err(dev, "can't afford required channels: %d\n", channels);
+ ret = -EINVAL;
+ } else {
+ asrc->channel_avail -= channels;
+ asrc->pair[index] = pair;
+ pair->channels = channels;
+ pair->index = index;
+ }
+
+ spin_unlock_irqrestore(&asrc->lock, lock_flags);
+
+ return ret;
+}
+
+/**
+ * fsl_asrc_release_pair - Release ASRC pair
+ * @pair: pair to release
+ *
+ * It clears the resource from asrc and releases the occupied channels.
+ */
+static void fsl_asrc_release_pair(struct fsl_asrc_pair *pair)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+ unsigned long lock_flags;
+
+ /* Make sure the pair is disabled */
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_ASRCEi_MASK(index), 0);
+
+ spin_lock_irqsave(&asrc->lock, lock_flags);
+
+ asrc->channel_avail += pair->channels;
+ asrc->pair[index] = NULL;
+ pair->error = 0;
+
+ spin_unlock_irqrestore(&asrc->lock, lock_flags);
+}
+
+/**
+ * fsl_asrc_set_watermarks- configure input and output thresholds
+ * @pair: pointer to pair
+ * @in: input threshold
+ * @out: output threshold
+ */
+static void fsl_asrc_set_watermarks(struct fsl_asrc_pair *pair, u32 in, u32 out)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+
+ regmap_update_bits(asrc->regmap, REG_ASRMCR(index),
+ ASRMCRi_EXTTHRSHi_MASK |
+ ASRMCRi_INFIFO_THRESHOLD_MASK |
+ ASRMCRi_OUTFIFO_THRESHOLD_MASK,
+ ASRMCRi_EXTTHRSHi |
+ ASRMCRi_INFIFO_THRESHOLD(in) |
+ ASRMCRi_OUTFIFO_THRESHOLD(out));
+}
+
+/**
+ * fsl_asrc_cal_asrck_divisor - Calculate the total divisor between asrck clock rate and sample rate
+ * @pair: pointer to pair
+ * @div: divider
+ *
+ * It follows the formula clk_rate = samplerate * (2 ^ prescaler) * divider
+ */
+static u32 fsl_asrc_cal_asrck_divisor(struct fsl_asrc_pair *pair, u32 div)
+{
+ u32 ps;
+
+ /* Calculate the divisors: prescaler [2^0, 2^7], divder [1, 8] */
+ for (ps = 0; div > 8; ps++)
+ div >>= 1;
+
+ return ((div - 1) << ASRCDRi_AxCPi_WIDTH) | ps;
+}
+
+/**
+ * fsl_asrc_set_ideal_ratio - Calculate and set the ratio for Ideal Ratio mode only
+ * @pair: pointer to pair
+ * @inrate: input rate
+ * @outrate: output rate
+ *
+ * The ratio is a 32-bit fixed point value with 26 fractional bits.
+ */
+static int fsl_asrc_set_ideal_ratio(struct fsl_asrc_pair *pair,
+ int inrate, int outrate)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+ unsigned long ratio;
+ int i;
+
+ if (!outrate) {
+ pair_err("output rate should not be zero\n");
+ return -EINVAL;
+ }
+
+ /* Calculate the intergal part of the ratio */
+ ratio = (inrate / outrate) << IDEAL_RATIO_DECIMAL_DEPTH;
+
+ /* ... and then the 26 depth decimal part */
+ inrate %= outrate;
+
+ for (i = 1; i <= IDEAL_RATIO_DECIMAL_DEPTH; i++) {
+ inrate <<= 1;
+
+ if (inrate < outrate)
+ continue;
+
+ ratio |= 1 << (IDEAL_RATIO_DECIMAL_DEPTH - i);
+ inrate -= outrate;
+
+ if (!inrate)
+ break;
+ }
+
+ regmap_write(asrc->regmap, REG_ASRIDRL(index), ratio);
+ regmap_write(asrc->regmap, REG_ASRIDRH(index), ratio >> 24);
+
+ return 0;
+}
+
+/**
+ * fsl_asrc_config_pair - Configure the assigned ASRC pair
+ * @pair: pointer to pair
+ * @use_ideal_rate: boolean configuration
+ *
+ * It configures those ASRC registers according to a configuration instance
+ * of struct asrc_config which includes in/output sample rate, width, channel
+ * and clock settings.
+ *
+ * Note:
+ * The ideal ratio configuration can work with a flexible clock rate setting.
+ * Using IDEAL_RATIO_RATE gives a faster converting speed but overloads ASRC.
+ * For a regular audio playback, the clock rate should not be slower than an
+ * clock rate aligning with the output sample rate; For a use case requiring
+ * faster conversion, set use_ideal_rate to have the faster speed.
+ */
+static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair, bool use_ideal_rate)
+{
+ struct fsl_asrc_pair_priv *pair_priv = pair->private;
+ struct asrc_config *config = pair_priv->config;
+ struct fsl_asrc *asrc = pair->asrc;
+ struct fsl_asrc_priv *asrc_priv = asrc->private;
+ enum asrc_pair_index index = pair->index;
+ enum asrc_word_width input_word_width;
+ enum asrc_word_width output_word_width;
+ u32 inrate, outrate, indiv, outdiv;
+ u32 clk_index[2], div[2];
+ u64 clk_rate;
+ int in, out, channels;
+ int pre_proc, post_proc;
+ struct clk *clk;
+ bool ideal, div_avail;
+
+ if (!config) {
+ pair_err("invalid pair config\n");
+ return -EINVAL;
+ }
+
+ /* Validate channels */
+ if (config->channel_num < 1 || config->channel_num > 10) {
+ pair_err("does not support %d channels\n", config->channel_num);
+ return -EINVAL;
+ }
+
+ switch (snd_pcm_format_width(config->input_format)) {
+ case 8:
+ input_word_width = ASRC_WIDTH_8_BIT;
+ break;
+ case 16:
+ input_word_width = ASRC_WIDTH_16_BIT;
+ break;
+ case 24:
+ input_word_width = ASRC_WIDTH_24_BIT;
+ break;
+ default:
+ pair_err("does not support this input format, %d\n",
+ config->input_format);
+ return -EINVAL;
+ }
+
+ switch (snd_pcm_format_width(config->output_format)) {
+ case 16:
+ output_word_width = ASRC_WIDTH_16_BIT;
+ break;
+ case 24:
+ output_word_width = ASRC_WIDTH_24_BIT;
+ break;
+ default:
+ pair_err("does not support this output format, %d\n",
+ config->output_format);
+ return -EINVAL;
+ }
+
+ inrate = config->input_sample_rate;
+ outrate = config->output_sample_rate;
+ ideal = config->inclk == INCLK_NONE;
+
+ /* Validate input and output sample rates */
+ for (in = 0; in < ARRAY_SIZE(supported_asrc_rate); in++)
+ if (inrate == supported_asrc_rate[in])
+ break;
+
+ if (in == ARRAY_SIZE(supported_asrc_rate)) {
+ pair_err("unsupported input sample rate: %dHz\n", inrate);
+ return -EINVAL;
+ }
+
+ for (out = 0; out < ARRAY_SIZE(supported_asrc_rate); out++)
+ if (outrate == supported_asrc_rate[out])
+ break;
+
+ if (out == ARRAY_SIZE(supported_asrc_rate)) {
+ pair_err("unsupported output sample rate: %dHz\n", outrate);
+ return -EINVAL;
+ }
+
+ if ((outrate >= 5512 && outrate <= 30000) &&
+ (outrate > 24 * inrate || inrate > 8 * outrate)) {
+ pair_err("exceed supported ratio range [1/24, 8] for \
+ inrate/outrate: %d/%d\n", inrate, outrate);
+ return -EINVAL;
+ }
+
+ /* Validate input and output clock sources */
+ clk_index[IN] = asrc_priv->clk_map[IN][config->inclk];
+ clk_index[OUT] = asrc_priv->clk_map[OUT][config->outclk];
+
+ /* We only have output clock for ideal ratio mode */
+ clk = asrc_priv->asrck_clk[clk_index[ideal ? OUT : IN]];
+
+ clk_rate = clk_get_rate(clk);
+ div_avail = fsl_asrc_divider_avail(clk_rate, inrate, &div[IN]);
+
+ /*
+ * The divider range is [1, 1024], defined by the hardware. For non-
+ * ideal ratio configuration, clock rate has to be strictly aligned
+ * with the sample rate. For ideal ratio configuration, clock rates
+ * only result in different converting speeds. So remainder does not
+ * matter, as long as we keep the divider within its valid range.
+ */
+ if (div[IN] == 0 || (!ideal && !div_avail)) {
+ pair_err("failed to support input sample rate %dHz by asrck_%x\n",
+ inrate, clk_index[ideal ? OUT : IN]);
+ return -EINVAL;
+ }
+
+ div[IN] = min_t(u32, 1024, div[IN]);
+
+ clk = asrc_priv->asrck_clk[clk_index[OUT]];
+ clk_rate = clk_get_rate(clk);
+ if (ideal && use_ideal_rate)
+ div_avail = fsl_asrc_divider_avail(clk_rate, IDEAL_RATIO_RATE, &div[OUT]);
+ else
+ div_avail = fsl_asrc_divider_avail(clk_rate, outrate, &div[OUT]);
+
+ /* Output divider has the same limitation as the input one */
+ if (div[OUT] == 0 || (!ideal && !div_avail)) {
+ pair_err("failed to support output sample rate %dHz by asrck_%x\n",
+ outrate, clk_index[OUT]);
+ return -EINVAL;
+ }
+
+ div[OUT] = min_t(u32, 1024, div[OUT]);
+
+ /* Set the channel number */
+ channels = config->channel_num;
+
+ if (asrc_priv->soc->channel_bits < 4)
+ channels /= 2;
+
+ /* Update channels for current pair */
+ regmap_update_bits(asrc->regmap, REG_ASRCNCR,
+ ASRCNCR_ANCi_MASK(index, asrc_priv->soc->channel_bits),
+ ASRCNCR_ANCi(index, channels, asrc_priv->soc->channel_bits));
+
+ /* Default setting: Automatic selection for processing mode */
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_ATSi_MASK(index), ASRCTR_ATS(index));
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_USRi_MASK(index), 0);
+
+ /* Set the input and output clock sources */
+ regmap_update_bits(asrc->regmap, REG_ASRCSR,
+ ASRCSR_AICSi_MASK(index) | ASRCSR_AOCSi_MASK(index),
+ ASRCSR_AICS(index, clk_index[IN]) |
+ ASRCSR_AOCS(index, clk_index[OUT]));
+
+ /* Calculate the input clock divisors */
+ indiv = fsl_asrc_cal_asrck_divisor(pair, div[IN]);
+ outdiv = fsl_asrc_cal_asrck_divisor(pair, div[OUT]);
+
+ /* Suppose indiv and outdiv includes prescaler, so add its MASK too */
+ regmap_update_bits(asrc->regmap, REG_ASRCDR(index),
+ ASRCDRi_AOCPi_MASK(index) | ASRCDRi_AICPi_MASK(index) |
+ ASRCDRi_AOCDi_MASK(index) | ASRCDRi_AICDi_MASK(index),
+ ASRCDRi_AOCP(index, outdiv) | ASRCDRi_AICP(index, indiv));
+
+ /* Implement word_width configurations */
+ regmap_update_bits(asrc->regmap, REG_ASRMCR1(index),
+ ASRMCR1i_OW16_MASK | ASRMCR1i_IWD_MASK,
+ ASRMCR1i_OW16(output_word_width) |
+ ASRMCR1i_IWD(input_word_width));
+
+ /* Enable BUFFER STALL */
+ regmap_update_bits(asrc->regmap, REG_ASRMCR(index),
+ ASRMCRi_BUFSTALLi_MASK, ASRMCRi_BUFSTALLi);
+
+ /* Set default thresholds for input and output FIFO */
+ fsl_asrc_set_watermarks(pair, ASRC_INPUTFIFO_THRESHOLD,
+ ASRC_INPUTFIFO_THRESHOLD);
+
+ /* Configure the following only for Ideal Ratio mode */
+ if (!ideal)
+ return 0;
+
+ /* Clear ASTSx bit to use Ideal Ratio mode */
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_ATSi_MASK(index), 0);
+
+ /* Enable Ideal Ratio mode */
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_IDRi_MASK(index) | ASRCTR_USRi_MASK(index),
+ ASRCTR_IDR(index) | ASRCTR_USR(index));
+
+ fsl_asrc_sel_proc(inrate, outrate, &pre_proc, &post_proc);
+
+ /* Apply configurations for pre- and post-processing */
+ regmap_update_bits(asrc->regmap, REG_ASRCFG,
+ ASRCFG_PREMODi_MASK(index) | ASRCFG_POSTMODi_MASK(index),
+ ASRCFG_PREMOD(index, pre_proc) |
+ ASRCFG_POSTMOD(index, post_proc));
+
+ return fsl_asrc_set_ideal_ratio(pair, inrate, outrate);
+}
+
+/**
+ * fsl_asrc_start_pair - Start the assigned ASRC pair
+ * @pair: pointer to pair
+ *
+ * It enables the assigned pair and makes it stopped at the stall level.
+ */
+static void fsl_asrc_start_pair(struct fsl_asrc_pair *pair)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+ int reg, retry = INIT_RETRY_NUM, i;
+
+ /* Enable the current pair */
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_ASRCEi_MASK(index), ASRCTR_ASRCE(index));
+
+ /* Wait for status of initialization */
+ do {
+ udelay(5);
+ regmap_read(asrc->regmap, REG_ASRCFG, &reg);
+ reg &= ASRCFG_INIRQi_MASK(index);
+ } while (!reg && --retry);
+
+ /* NOTE: Doesn't treat initialization timeout as an error */
+ if (!retry)
+ pair_warn("initialization isn't finished\n");
+
+ /* Make the input fifo to ASRC STALL level */
+ regmap_read(asrc->regmap, REG_ASRCNCR, &reg);
+ for (i = 0; i < pair->channels * 4; i++)
+ regmap_write(asrc->regmap, REG_ASRDI(index), 0);
+
+ /* Enable overload interrupt */
+ regmap_write(asrc->regmap, REG_ASRIER, ASRIER_AOLIE);
+}
+
+/**
+ * fsl_asrc_stop_pair - Stop the assigned ASRC pair
+ * @pair: pointer to pair
+ */
+static void fsl_asrc_stop_pair(struct fsl_asrc_pair *pair)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+
+ /* Stop the current pair */
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_ASRCEi_MASK(index), 0);
+}
+
+/**
+ * fsl_asrc_get_dma_channel- Get DMA channel according to the pair and direction.
+ * @pair: pointer to pair
+ * @dir: DMA direction
+ */
+static struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair,
+ bool dir)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+ char name[4];
+
+ sprintf(name, "%cx%c", dir == IN ? 'r' : 't', index + 'a');
+
+ return dma_request_slave_channel(&asrc->pdev->dev, name);
+}
+
+static int fsl_asrc_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct fsl_asrc *asrc = snd_soc_dai_get_drvdata(dai);
+ struct fsl_asrc_priv *asrc_priv = asrc->private;
+
+ /* Odd channel number is not valid for older ASRC (channel_bits==3) */
+ if (asrc_priv->soc->channel_bits == 3)
+ snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS, 2);
+
+
+ return snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE, &fsl_asrc_rate_constraints);
+}
+
+/* Select proper clock source for internal ratio mode */
+static void fsl_asrc_select_clk(struct fsl_asrc_priv *asrc_priv,
+ struct fsl_asrc_pair *pair,
+ int in_rate,
+ int out_rate)
+{
+ struct fsl_asrc_pair_priv *pair_priv = pair->private;
+ struct asrc_config *config = pair_priv->config;
+ int rate[2], select_clk[2]; /* Array size 2 means IN and OUT */
+ int clk_rate, clk_index;
+ int i, j;
+
+ rate[IN] = in_rate;
+ rate[OUT] = out_rate;
+
+ /* Select proper clock source for internal ratio mode */
+ for (j = 0; j < 2; j++) {
+ for (i = 0; i < ASRC_CLK_MAP_LEN; i++) {
+ clk_index = asrc_priv->clk_map[j][i];
+ clk_rate = clk_get_rate(asrc_priv->asrck_clk[clk_index]);
+ /* Only match a perfect clock source with no remainder */
+ if (fsl_asrc_divider_avail(clk_rate, rate[j], NULL))
+ break;
+ }
+
+ select_clk[j] = i;
+ }
+
+ /* Switch to ideal ratio mode if there is no proper clock source */
+ if (select_clk[IN] == ASRC_CLK_MAP_LEN || select_clk[OUT] == ASRC_CLK_MAP_LEN) {
+ select_clk[IN] = INCLK_NONE;
+ select_clk[OUT] = OUTCLK_ASRCK1_CLK;
+ }
+
+ config->inclk = select_clk[IN];
+ config->outclk = select_clk[OUT];
+}
+
+static int fsl_asrc_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct fsl_asrc *asrc = snd_soc_dai_get_drvdata(dai);
+ struct fsl_asrc_priv *asrc_priv = asrc->private;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct fsl_asrc_pair *pair = runtime->private_data;
+ struct fsl_asrc_pair_priv *pair_priv = pair->private;
+ unsigned int channels = params_channels(params);
+ unsigned int rate = params_rate(params);
+ struct asrc_config config;
+ int ret;
+
+ ret = fsl_asrc_request_pair(channels, pair);
+ if (ret) {
+ dev_err(dai->dev, "fail to request asrc pair\n");
+ return ret;
+ }
+
+ pair_priv->config = &config;
+
+ config.pair = pair->index;
+ config.channel_num = channels;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ config.input_format = params_format(params);
+ config.output_format = asrc->asrc_format;
+ config.input_sample_rate = rate;
+ config.output_sample_rate = asrc->asrc_rate;
+ } else {
+ config.input_format = asrc->asrc_format;
+ config.output_format = params_format(params);
+ config.input_sample_rate = asrc->asrc_rate;
+ config.output_sample_rate = rate;
+ }
+
+ fsl_asrc_select_clk(asrc_priv, pair,
+ config.input_sample_rate,
+ config.output_sample_rate);
+
+ ret = fsl_asrc_config_pair(pair, false);
+ if (ret) {
+ dev_err(dai->dev, "fail to config asrc pair\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int fsl_asrc_dai_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct fsl_asrc_pair *pair = runtime->private_data;
+
+ if (pair)
+ fsl_asrc_release_pair(pair);
+
+ return 0;
+}
+
+static int fsl_asrc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct fsl_asrc_pair *pair = runtime->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ fsl_asrc_start_pair(pair);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ fsl_asrc_stop_pair(pair);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops fsl_asrc_dai_ops = {
+ .startup = fsl_asrc_dai_startup,
+ .hw_params = fsl_asrc_dai_hw_params,
+ .hw_free = fsl_asrc_dai_hw_free,
+ .trigger = fsl_asrc_dai_trigger,
+};
+
+static int fsl_asrc_dai_probe(struct snd_soc_dai *dai)
+{
+ struct fsl_asrc *asrc = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai, &asrc->dma_params_tx,
+ &asrc->dma_params_rx);
+
+ return 0;
+}
+
+#define FSL_ASRC_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S24_3LE)
+
+static struct snd_soc_dai_driver fsl_asrc_dai = {
+ .probe = fsl_asrc_dai_probe,
+ .playback = {
+ .stream_name = "ASRC-Playback",
+ .channels_min = 1,
+ .channels_max = 10,
+ .rate_min = 5512,
+ .rate_max = 192000,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = FSL_ASRC_FORMATS |
+ SNDRV_PCM_FMTBIT_S8,
+ },
+ .capture = {
+ .stream_name = "ASRC-Capture",
+ .channels_min = 1,
+ .channels_max = 10,
+ .rate_min = 5512,
+ .rate_max = 192000,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = FSL_ASRC_FORMATS,
+ },
+ .ops = &fsl_asrc_dai_ops,
+};
+
+static bool fsl_asrc_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case REG_ASRCTR:
+ case REG_ASRIER:
+ case REG_ASRCNCR:
+ case REG_ASRCFG:
+ case REG_ASRCSR:
+ case REG_ASRCDR1:
+ case REG_ASRCDR2:
+ case REG_ASRSTR:
+ case REG_ASRPM1:
+ case REG_ASRPM2:
+ case REG_ASRPM3:
+ case REG_ASRPM4:
+ case REG_ASRPM5:
+ case REG_ASRTFR1:
+ case REG_ASRCCR:
+ case REG_ASRDOA:
+ case REG_ASRDOB:
+ case REG_ASRDOC:
+ case REG_ASRIDRHA:
+ case REG_ASRIDRLA:
+ case REG_ASRIDRHB:
+ case REG_ASRIDRLB:
+ case REG_ASRIDRHC:
+ case REG_ASRIDRLC:
+ case REG_ASR76K:
+ case REG_ASR56K:
+ case REG_ASRMCRA:
+ case REG_ASRFSTA:
+ case REG_ASRMCRB:
+ case REG_ASRFSTB:
+ case REG_ASRMCRC:
+ case REG_ASRFSTC:
+ case REG_ASRMCR1A:
+ case REG_ASRMCR1B:
+ case REG_ASRMCR1C:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool fsl_asrc_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case REG_ASRSTR:
+ case REG_ASRDIA:
+ case REG_ASRDIB:
+ case REG_ASRDIC:
+ case REG_ASRDOA:
+ case REG_ASRDOB:
+ case REG_ASRDOC:
+ case REG_ASRFSTA:
+ case REG_ASRFSTB:
+ case REG_ASRFSTC:
+ case REG_ASRCFG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool fsl_asrc_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case REG_ASRCTR:
+ case REG_ASRIER:
+ case REG_ASRCNCR:
+ case REG_ASRCFG:
+ case REG_ASRCSR:
+ case REG_ASRCDR1:
+ case REG_ASRCDR2:
+ case REG_ASRSTR:
+ case REG_ASRPM1:
+ case REG_ASRPM2:
+ case REG_ASRPM3:
+ case REG_ASRPM4:
+ case REG_ASRPM5:
+ case REG_ASRTFR1:
+ case REG_ASRCCR:
+ case REG_ASRDIA:
+ case REG_ASRDIB:
+ case REG_ASRDIC:
+ case REG_ASRIDRHA:
+ case REG_ASRIDRLA:
+ case REG_ASRIDRHB:
+ case REG_ASRIDRLB:
+ case REG_ASRIDRHC:
+ case REG_ASRIDRLC:
+ case REG_ASR76K:
+ case REG_ASR56K:
+ case REG_ASRMCRA:
+ case REG_ASRMCRB:
+ case REG_ASRMCRC:
+ case REG_ASRMCR1A:
+ case REG_ASRMCR1B:
+ case REG_ASRMCR1C:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static struct reg_default fsl_asrc_reg[] = {
+ { REG_ASRCTR, 0x0000 }, { REG_ASRIER, 0x0000 },
+ { REG_ASRCNCR, 0x0000 }, { REG_ASRCFG, 0x0000 },
+ { REG_ASRCSR, 0x0000 }, { REG_ASRCDR1, 0x0000 },
+ { REG_ASRCDR2, 0x0000 }, { REG_ASRSTR, 0x0000 },
+ { REG_ASRRA, 0x0000 }, { REG_ASRRB, 0x0000 },
+ { REG_ASRRC, 0x0000 }, { REG_ASRPM1, 0x0000 },
+ { REG_ASRPM2, 0x0000 }, { REG_ASRPM3, 0x0000 },
+ { REG_ASRPM4, 0x0000 }, { REG_ASRPM5, 0x0000 },
+ { REG_ASRTFR1, 0x0000 }, { REG_ASRCCR, 0x0000 },
+ { REG_ASRDIA, 0x0000 }, { REG_ASRDOA, 0x0000 },
+ { REG_ASRDIB, 0x0000 }, { REG_ASRDOB, 0x0000 },
+ { REG_ASRDIC, 0x0000 }, { REG_ASRDOC, 0x0000 },
+ { REG_ASRIDRHA, 0x0000 }, { REG_ASRIDRLA, 0x0000 },
+ { REG_ASRIDRHB, 0x0000 }, { REG_ASRIDRLB, 0x0000 },
+ { REG_ASRIDRHC, 0x0000 }, { REG_ASRIDRLC, 0x0000 },
+ { REG_ASR76K, 0x0A47 }, { REG_ASR56K, 0x0DF3 },
+ { REG_ASRMCRA, 0x0000 }, { REG_ASRFSTA, 0x0000 },
+ { REG_ASRMCRB, 0x0000 }, { REG_ASRFSTB, 0x0000 },
+ { REG_ASRMCRC, 0x0000 }, { REG_ASRFSTC, 0x0000 },
+ { REG_ASRMCR1A, 0x0000 }, { REG_ASRMCR1B, 0x0000 },
+ { REG_ASRMCR1C, 0x0000 },
+};
+
+static const struct regmap_config fsl_asrc_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+
+ .max_register = REG_ASRMCR1C,
+ .reg_defaults = fsl_asrc_reg,
+ .num_reg_defaults = ARRAY_SIZE(fsl_asrc_reg),
+ .readable_reg = fsl_asrc_readable_reg,
+ .volatile_reg = fsl_asrc_volatile_reg,
+ .writeable_reg = fsl_asrc_writeable_reg,
+ .cache_type = REGCACHE_FLAT,
+};
+
+/**
+ * fsl_asrc_init - Initialize ASRC registers with a default configuration
+ * @asrc: ASRC context
+ */
+static int fsl_asrc_init(struct fsl_asrc *asrc)
+{
+ unsigned long ipg_rate;
+
+ /* Halt ASRC internal FP when input FIFO needs data for pair A, B, C */
+ regmap_write(asrc->regmap, REG_ASRCTR, ASRCTR_ASRCEN);
+
+ /* Disable interrupt by default */
+ regmap_write(asrc->regmap, REG_ASRIER, 0x0);
+
+ /* Apply recommended settings for parameters from Reference Manual */
+ regmap_write(asrc->regmap, REG_ASRPM1, 0x7fffff);
+ regmap_write(asrc->regmap, REG_ASRPM2, 0x255555);
+ regmap_write(asrc->regmap, REG_ASRPM3, 0xff7280);
+ regmap_write(asrc->regmap, REG_ASRPM4, 0xff7280);
+ regmap_write(asrc->regmap, REG_ASRPM5, 0xff7280);
+
+ /* Base address for task queue FIFO. Set to 0x7C */
+ regmap_update_bits(asrc->regmap, REG_ASRTFR1,
+ ASRTFR1_TF_BASE_MASK, ASRTFR1_TF_BASE(0xfc));
+
+ /*
+ * Set the period of the 76KHz and 56KHz sampling clocks based on
+ * the ASRC processing clock.
+ * On iMX6, ipg_clk = 133MHz, REG_ASR76K = 0x06D6, REG_ASR56K = 0x0947
+ */
+ ipg_rate = clk_get_rate(asrc->ipg_clk);
+ regmap_write(asrc->regmap, REG_ASR76K, ipg_rate / 76000);
+ return regmap_write(asrc->regmap, REG_ASR56K, ipg_rate / 56000);
+}
+
+/**
+ * fsl_asrc_isr- Interrupt handler for ASRC
+ * @irq: irq number
+ * @dev_id: ASRC context
+ */
+static irqreturn_t fsl_asrc_isr(int irq, void *dev_id)
+{
+ struct fsl_asrc *asrc = (struct fsl_asrc *)dev_id;
+ struct device *dev = &asrc->pdev->dev;
+ enum asrc_pair_index index;
+ u32 status;
+
+ regmap_read(asrc->regmap, REG_ASRSTR, &status);
+
+ /* Clean overload error */
+ regmap_write(asrc->regmap, REG_ASRSTR, ASRSTR_AOLE);
+
+ /*
+ * We here use dev_dbg() for all exceptions because ASRC itself does
+ * not care if FIFO overflowed or underrun while a warning in the
+ * interrupt would result a ridged conversion.
+ */
+ for (index = ASRC_PAIR_A; index < ASRC_PAIR_MAX_NUM; index++) {
+ if (!asrc->pair[index])
+ continue;
+
+ if (status & ASRSTR_ATQOL) {
+ asrc->pair[index]->error |= ASRC_TASK_Q_OVERLOAD;
+ dev_dbg(dev, "ASRC Task Queue FIFO overload\n");
+ }
+
+ if (status & ASRSTR_AOOL(index)) {
+ asrc->pair[index]->error |= ASRC_OUTPUT_TASK_OVERLOAD;
+ pair_dbg("Output Task Overload\n");
+ }
+
+ if (status & ASRSTR_AIOL(index)) {
+ asrc->pair[index]->error |= ASRC_INPUT_TASK_OVERLOAD;
+ pair_dbg("Input Task Overload\n");
+ }
+
+ if (status & ASRSTR_AODO(index)) {
+ asrc->pair[index]->error |= ASRC_OUTPUT_BUFFER_OVERFLOW;
+ pair_dbg("Output Data Buffer has overflowed\n");
+ }
+
+ if (status & ASRSTR_AIDU(index)) {
+ asrc->pair[index]->error |= ASRC_INPUT_BUFFER_UNDERRUN;
+ pair_dbg("Input Data Buffer has underflowed\n");
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int fsl_asrc_get_fifo_addr(u8 dir, enum asrc_pair_index index)
+{
+ return REG_ASRDx(dir, index);
+}
+
+static int fsl_asrc_runtime_resume(struct device *dev);
+static int fsl_asrc_runtime_suspend(struct device *dev);
+
+static int fsl_asrc_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct fsl_asrc_priv *asrc_priv;
+ struct fsl_asrc *asrc;
+ struct resource *res;
+ void __iomem *regs;
+ int irq, ret, i;
+ u32 asrc_fmt = 0;
+ u32 map_idx;
+ char tmp[16];
+ u32 width;
+
+ asrc = devm_kzalloc(&pdev->dev, sizeof(*asrc), GFP_KERNEL);
+ if (!asrc)
+ return -ENOMEM;
+
+ asrc_priv = devm_kzalloc(&pdev->dev, sizeof(*asrc_priv), GFP_KERNEL);
+ if (!asrc_priv)
+ return -ENOMEM;
+
+ asrc->pdev = pdev;
+ asrc->private = asrc_priv;
+
+ /* Get the addresses and IRQ */
+ regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ asrc->paddr = res->start;
+
+ asrc->regmap = devm_regmap_init_mmio(&pdev->dev, regs, &fsl_asrc_regmap_config);
+ if (IS_ERR(asrc->regmap)) {
+ dev_err(&pdev->dev, "failed to init regmap\n");
+ return PTR_ERR(asrc->regmap);
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_irq(&pdev->dev, irq, fsl_asrc_isr, 0,
+ dev_name(&pdev->dev), asrc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to claim irq %u: %d\n", irq, ret);
+ return ret;
+ }
+
+ asrc->mem_clk = devm_clk_get(&pdev->dev, "mem");
+ if (IS_ERR(asrc->mem_clk)) {
+ dev_err(&pdev->dev, "failed to get mem clock\n");
+ return PTR_ERR(asrc->mem_clk);
+ }
+
+ asrc->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
+ if (IS_ERR(asrc->ipg_clk)) {
+ dev_err(&pdev->dev, "failed to get ipg clock\n");
+ return PTR_ERR(asrc->ipg_clk);
+ }
+
+ asrc->spba_clk = devm_clk_get(&pdev->dev, "spba");
+ if (IS_ERR(asrc->spba_clk))
+ dev_warn(&pdev->dev, "failed to get spba clock\n");
+
+ for (i = 0; i < ASRC_CLK_MAX_NUM; i++) {
+ sprintf(tmp, "asrck_%x", i);
+ asrc_priv->asrck_clk[i] = devm_clk_get(&pdev->dev, tmp);
+ if (IS_ERR(asrc_priv->asrck_clk[i])) {
+ dev_err(&pdev->dev, "failed to get %s clock\n", tmp);
+ return PTR_ERR(asrc_priv->asrck_clk[i]);
+ }
+ }
+
+ asrc_priv->soc = of_device_get_match_data(&pdev->dev);
+ asrc->use_edma = asrc_priv->soc->use_edma;
+ asrc->get_dma_channel = fsl_asrc_get_dma_channel;
+ asrc->request_pair = fsl_asrc_request_pair;
+ asrc->release_pair = fsl_asrc_release_pair;
+ asrc->get_fifo_addr = fsl_asrc_get_fifo_addr;
+ asrc->pair_priv_size = sizeof(struct fsl_asrc_pair_priv);
+
+ if (of_device_is_compatible(np, "fsl,imx35-asrc")) {
+ asrc_priv->clk_map[IN] = input_clk_map_imx35;
+ asrc_priv->clk_map[OUT] = output_clk_map_imx35;
+ } else if (of_device_is_compatible(np, "fsl,imx53-asrc")) {
+ asrc_priv->clk_map[IN] = input_clk_map_imx53;
+ asrc_priv->clk_map[OUT] = output_clk_map_imx53;
+ } else if (of_device_is_compatible(np, "fsl,imx8qm-asrc") ||
+ of_device_is_compatible(np, "fsl,imx8qxp-asrc")) {
+ ret = of_property_read_u32(np, "fsl,asrc-clk-map", &map_idx);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get clk map index\n");
+ return ret;
+ }
+
+ if (map_idx > 1) {
+ dev_err(&pdev->dev, "unsupported clk map index\n");
+ return -EINVAL;
+ }
+ if (of_device_is_compatible(np, "fsl,imx8qm-asrc")) {
+ asrc_priv->clk_map[IN] = clk_map_imx8qm[map_idx];
+ asrc_priv->clk_map[OUT] = clk_map_imx8qm[map_idx];
+ } else {
+ asrc_priv->clk_map[IN] = clk_map_imx8qxp[map_idx];
+ asrc_priv->clk_map[OUT] = clk_map_imx8qxp[map_idx];
+ }
+ }
+
+ asrc->channel_avail = 10;
+
+ ret = of_property_read_u32(np, "fsl,asrc-rate",
+ &asrc->asrc_rate);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get output rate\n");
+ return ret;
+ }
+
+ ret = of_property_read_u32(np, "fsl,asrc-format", &asrc_fmt);
+ asrc->asrc_format = (__force snd_pcm_format_t)asrc_fmt;
+ if (ret) {
+ ret = of_property_read_u32(np, "fsl,asrc-width", &width);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to decide output format\n");
+ return ret;
+ }
+
+ switch (width) {
+ case 16:
+ asrc->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
+ break;
+ case 24:
+ asrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+ break;
+ default:
+ dev_warn(&pdev->dev,
+ "unsupported width, use default S24_LE\n");
+ asrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+ break;
+ }
+ }
+
+ if (!(FSL_ASRC_FORMATS & pcm_format_to_bits(asrc->asrc_format))) {
+ dev_warn(&pdev->dev, "unsupported width, use default S24_LE\n");
+ asrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+ }
+
+ platform_set_drvdata(pdev, asrc);
+ spin_lock_init(&asrc->lock);
+ pm_runtime_enable(&pdev->dev);
+ if (!pm_runtime_enabled(&pdev->dev)) {
+ ret = fsl_asrc_runtime_resume(&pdev->dev);
+ if (ret)
+ goto err_pm_disable;
+ }
+
+ ret = pm_runtime_resume_and_get(&pdev->dev);
+ if (ret < 0)
+ goto err_pm_get_sync;
+
+ ret = fsl_asrc_init(asrc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init asrc %d\n", ret);
+ goto err_pm_get_sync;
+ }
+
+ ret = pm_runtime_put_sync(&pdev->dev);
+ if (ret < 0 && ret != -ENOSYS)
+ goto err_pm_get_sync;
+
+ ret = devm_snd_soc_register_component(&pdev->dev, &fsl_asrc_component,
+ &fsl_asrc_dai, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register ASoC DAI\n");
+ goto err_pm_get_sync;
+ }
+
+ return 0;
+
+err_pm_get_sync:
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ fsl_asrc_runtime_suspend(&pdev->dev);
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
+ return ret;
+}
+
+static int fsl_asrc_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ fsl_asrc_runtime_suspend(&pdev->dev);
+
+ return 0;
+}
+
+static int fsl_asrc_runtime_resume(struct device *dev)
+{
+ struct fsl_asrc *asrc = dev_get_drvdata(dev);
+ struct fsl_asrc_priv *asrc_priv = asrc->private;
+ int reg, retry = INIT_RETRY_NUM;
+ int i, ret;
+ u32 asrctr;
+
+ ret = clk_prepare_enable(asrc->mem_clk);
+ if (ret)
+ return ret;
+ ret = clk_prepare_enable(asrc->ipg_clk);
+ if (ret)
+ goto disable_mem_clk;
+ if (!IS_ERR(asrc->spba_clk)) {
+ ret = clk_prepare_enable(asrc->spba_clk);
+ if (ret)
+ goto disable_ipg_clk;
+ }
+ for (i = 0; i < ASRC_CLK_MAX_NUM; i++) {
+ ret = clk_prepare_enable(asrc_priv->asrck_clk[i]);
+ if (ret)
+ goto disable_asrck_clk;
+ }
+
+ /* Stop all pairs provisionally */
+ regmap_read(asrc->regmap, REG_ASRCTR, &asrctr);
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_ASRCEi_ALL_MASK, 0);
+
+ /* Restore all registers */
+ regcache_cache_only(asrc->regmap, false);
+ regcache_mark_dirty(asrc->regmap);
+ regcache_sync(asrc->regmap);
+
+ regmap_update_bits(asrc->regmap, REG_ASRCFG,
+ ASRCFG_NDPRi_ALL_MASK | ASRCFG_POSTMODi_ALL_MASK |
+ ASRCFG_PREMODi_ALL_MASK, asrc_priv->regcache_cfg);
+
+ /* Restart enabled pairs */
+ regmap_update_bits(asrc->regmap, REG_ASRCTR,
+ ASRCTR_ASRCEi_ALL_MASK, asrctr);
+
+ /* Wait for status of initialization for all enabled pairs */
+ do {
+ udelay(5);
+ regmap_read(asrc->regmap, REG_ASRCFG, &reg);
+ reg = (reg >> ASRCFG_INIRQi_SHIFT(0)) & 0x7;
+ } while ((reg != ((asrctr >> ASRCTR_ASRCEi_SHIFT(0)) & 0x7)) && --retry);
+
+ /*
+ * NOTE: Doesn't treat initialization timeout as an error
+ * Some of the pairs may success, then still can continue.
+ */
+ if (!retry) {
+ for (i = ASRC_PAIR_A; i < ASRC_PAIR_MAX_NUM; i++) {
+ if ((asrctr & ASRCTR_ASRCEi_MASK(i)) && !(reg & (1 << i)))
+ dev_warn(dev, "Pair %c initialization isn't finished\n", 'A' + i);
+ }
+ }
+
+ return 0;
+
+disable_asrck_clk:
+ for (i--; i >= 0; i--)
+ clk_disable_unprepare(asrc_priv->asrck_clk[i]);
+ if (!IS_ERR(asrc->spba_clk))
+ clk_disable_unprepare(asrc->spba_clk);
+disable_ipg_clk:
+ clk_disable_unprepare(asrc->ipg_clk);
+disable_mem_clk:
+ clk_disable_unprepare(asrc->mem_clk);
+ return ret;
+}
+
+static int fsl_asrc_runtime_suspend(struct device *dev)
+{
+ struct fsl_asrc *asrc = dev_get_drvdata(dev);
+ struct fsl_asrc_priv *asrc_priv = asrc->private;
+ int i;
+
+ regmap_read(asrc->regmap, REG_ASRCFG,
+ &asrc_priv->regcache_cfg);
+
+ regcache_cache_only(asrc->regmap, true);
+
+ for (i = 0; i < ASRC_CLK_MAX_NUM; i++)
+ clk_disable_unprepare(asrc_priv->asrck_clk[i]);
+ if (!IS_ERR(asrc->spba_clk))
+ clk_disable_unprepare(asrc->spba_clk);
+ clk_disable_unprepare(asrc->ipg_clk);
+ clk_disable_unprepare(asrc->mem_clk);
+
+ return 0;
+}
+
+static const struct dev_pm_ops fsl_asrc_pm = {
+ SET_RUNTIME_PM_OPS(fsl_asrc_runtime_suspend, fsl_asrc_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+
+static const struct fsl_asrc_soc_data fsl_asrc_imx35_data = {
+ .use_edma = false,
+ .channel_bits = 3,
+};
+
+static const struct fsl_asrc_soc_data fsl_asrc_imx53_data = {
+ .use_edma = false,
+ .channel_bits = 4,
+};
+
+static const struct fsl_asrc_soc_data fsl_asrc_imx8qm_data = {
+ .use_edma = true,
+ .channel_bits = 4,
+};
+
+static const struct fsl_asrc_soc_data fsl_asrc_imx8qxp_data = {
+ .use_edma = true,
+ .channel_bits = 4,
+};
+
+static const struct of_device_id fsl_asrc_ids[] = {
+ { .compatible = "fsl,imx35-asrc", .data = &fsl_asrc_imx35_data },
+ { .compatible = "fsl,imx53-asrc", .data = &fsl_asrc_imx53_data },
+ { .compatible = "fsl,imx8qm-asrc", .data = &fsl_asrc_imx8qm_data },
+ { .compatible = "fsl,imx8qxp-asrc", .data = &fsl_asrc_imx8qxp_data },
+ {}
+};
+MODULE_DEVICE_TABLE(of, fsl_asrc_ids);
+
+static struct platform_driver fsl_asrc_driver = {
+ .probe = fsl_asrc_probe,
+ .remove = fsl_asrc_remove,
+ .driver = {
+ .name = "fsl-asrc",
+ .of_match_table = fsl_asrc_ids,
+ .pm = &fsl_asrc_pm,
+ },
+};
+module_platform_driver(fsl_asrc_driver);
+
+MODULE_DESCRIPTION("Freescale ASRC ASoC driver");
+MODULE_AUTHOR("Nicolin Chen <nicoleotsuka@gmail.com>");
+MODULE_ALIAS("platform:fsl-asrc");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 05:58:45 +0000