diff options
Diffstat (limited to 'sound/soc/fsl/fsl_xcvr.c')
| -rw-r--r-- | sound/soc/fsl/fsl_xcvr.c | 1388 |
1 files changed, 1388 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c new file mode 100644 index 000000000..c043efe45 --- /dev/null +++ b/sound/soc/fsl/fsl_xcvr.c @@ -0,0 +1,1388 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright 2019 NXP + +#include <linux/bitrev.h> +#include <linux/clk.h> +#include <linux/firmware.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm_iec958.h> +#include <sound/pcm_params.h> + +#include "fsl_xcvr.h" +#include "imx-pcm.h" + +#define FSL_XCVR_CAPDS_SIZE 256 + +struct fsl_xcvr_soc_data { + const char *fw_name; +}; + +struct fsl_xcvr { + const struct fsl_xcvr_soc_data *soc_data; + struct platform_device *pdev; + struct regmap *regmap; + struct clk *ipg_clk; + struct clk *pll_ipg_clk; + struct clk *phy_clk; + struct clk *spba_clk; + struct reset_control *reset; + u8 streams; + u32 mode; + u32 arc_mode; + void __iomem *ram_addr; + struct snd_dmaengine_dai_dma_data dma_prms_rx; + struct snd_dmaengine_dai_dma_data dma_prms_tx; + struct snd_aes_iec958 rx_iec958; + struct snd_aes_iec958 tx_iec958; + u8 cap_ds[FSL_XCVR_CAPDS_SIZE]; +}; + +static const struct fsl_xcvr_pll_conf { + u8 mfi; /* min=0x18, max=0x38 */ + u32 mfn; /* signed int, 2's compl., min=0x3FFF0000, max=0x00010000 */ + u32 mfd; /* unsigned int */ + u32 fout; /* Fout = Fref*(MFI + MFN/MFD), Fref is 24MHz */ +} fsl_xcvr_pll_cfg[] = { + { .mfi = 54, .mfn = 1, .mfd = 6, .fout = 1300000000, }, /* 1.3 GHz */ + { .mfi = 32, .mfn = 96, .mfd = 125, .fout = 786432000, }, /* 8000 Hz */ + { .mfi = 30, .mfn = 66, .mfd = 625, .fout = 722534400, }, /* 11025 Hz */ + { .mfi = 29, .mfn = 1, .mfd = 6, .fout = 700000000, }, /* 700 MHz */ +}; + +/* + * HDMI2.1 spec defines 6- and 12-channels layout for one bit audio + * stream. Todo: to check how this case can be considered below + */ +static const u32 fsl_xcvr_earc_channels[] = { 1, 2, 8, 16, 32, }; +static const struct snd_pcm_hw_constraint_list fsl_xcvr_earc_channels_constr = { + .count = ARRAY_SIZE(fsl_xcvr_earc_channels), + .list = fsl_xcvr_earc_channels, +}; + +static const u32 fsl_xcvr_earc_rates[] = { + 32000, 44100, 48000, 64000, 88200, 96000, + 128000, 176400, 192000, 256000, 352800, 384000, + 512000, 705600, 768000, 1024000, 1411200, 1536000, +}; +static const struct snd_pcm_hw_constraint_list fsl_xcvr_earc_rates_constr = { + .count = ARRAY_SIZE(fsl_xcvr_earc_rates), + .list = fsl_xcvr_earc_rates, +}; + +static const u32 fsl_xcvr_spdif_channels[] = { 2, }; +static const struct snd_pcm_hw_constraint_list fsl_xcvr_spdif_channels_constr = { + .count = ARRAY_SIZE(fsl_xcvr_spdif_channels), + .list = fsl_xcvr_spdif_channels, +}; + +static const u32 fsl_xcvr_spdif_rates[] = { + 32000, 44100, 48000, 88200, 96000, 176400, 192000, +}; +static const struct snd_pcm_hw_constraint_list fsl_xcvr_spdif_rates_constr = { + .count = ARRAY_SIZE(fsl_xcvr_spdif_rates), + .list = fsl_xcvr_spdif_rates, +}; + +static int fsl_xcvr_arc_mode_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int *item = ucontrol->value.enumerated.item; + + xcvr->arc_mode = snd_soc_enum_item_to_val(e, item[0]); + + return 0; +} + +static int fsl_xcvr_arc_mode_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + ucontrol->value.enumerated.item[0] = xcvr->arc_mode; + + return 0; +} + +static const u32 fsl_xcvr_phy_arc_cfg[] = { + FSL_XCVR_PHY_CTRL_ARC_MODE_SE_EN, FSL_XCVR_PHY_CTRL_ARC_MODE_CM_EN, +}; + +static const char * const fsl_xcvr_arc_mode[] = { "Single Ended", "Common", }; +static const struct soc_enum fsl_xcvr_arc_mode_enum = + SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(fsl_xcvr_arc_mode), fsl_xcvr_arc_mode); +static struct snd_kcontrol_new fsl_xcvr_arc_mode_kctl = + SOC_ENUM_EXT("ARC Mode", fsl_xcvr_arc_mode_enum, + fsl_xcvr_arc_mode_get, fsl_xcvr_arc_mode_put); + +/* Capabilities data structure, bytes */ +static int fsl_xcvr_type_capds_bytes_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; + uinfo->count = FSL_XCVR_CAPDS_SIZE; + + return 0; +} + +static int fsl_xcvr_capds_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + memcpy(ucontrol->value.bytes.data, xcvr->cap_ds, FSL_XCVR_CAPDS_SIZE); + + return 0; +} + +static int fsl_xcvr_capds_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + memcpy(xcvr->cap_ds, ucontrol->value.bytes.data, FSL_XCVR_CAPDS_SIZE); + + return 0; +} + +static struct snd_kcontrol_new fsl_xcvr_earc_capds_kctl = { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "Capabilities Data Structure", + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = fsl_xcvr_type_capds_bytes_info, + .get = fsl_xcvr_capds_get, + .put = fsl_xcvr_capds_put, +}; + +static int fsl_xcvr_activate_ctl(struct snd_soc_dai *dai, const char *name, + bool active) +{ + struct snd_soc_card *card = dai->component->card; + struct snd_kcontrol *kctl; + bool enabled; + + kctl = snd_soc_card_get_kcontrol(card, name); + if (kctl == NULL) + return -ENOENT; + + enabled = ((kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_WRITE) != 0); + if (active == enabled) + return 0; /* nothing to do */ + + if (active) + kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_WRITE; + else + kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_WRITE; + + snd_ctl_notify(card->snd_card, SNDRV_CTL_EVENT_MASK_INFO, &kctl->id); + + return 1; +} + +static int fsl_xcvr_mode_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int *item = ucontrol->value.enumerated.item; + struct snd_soc_card *card = dai->component->card; + struct snd_soc_pcm_runtime *rtd; + + xcvr->mode = snd_soc_enum_item_to_val(e, item[0]); + + fsl_xcvr_activate_ctl(dai, fsl_xcvr_arc_mode_kctl.name, + (xcvr->mode == FSL_XCVR_MODE_ARC)); + fsl_xcvr_activate_ctl(dai, fsl_xcvr_earc_capds_kctl.name, + (xcvr->mode == FSL_XCVR_MODE_EARC)); + /* Allow playback for SPDIF only */ + rtd = snd_soc_get_pcm_runtime(card, card->dai_link); + rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count = + (xcvr->mode == FSL_XCVR_MODE_SPDIF ? 1 : 0); + return 0; +} + +static int fsl_xcvr_mode_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + ucontrol->value.enumerated.item[0] = xcvr->mode; + + return 0; +} + +static const char * const fsl_xcvr_mode[] = { "SPDIF", "ARC RX", "eARC", }; +static const struct soc_enum fsl_xcvr_mode_enum = + SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(fsl_xcvr_mode), fsl_xcvr_mode); +static struct snd_kcontrol_new fsl_xcvr_mode_kctl = + SOC_ENUM_EXT("XCVR Mode", fsl_xcvr_mode_enum, + fsl_xcvr_mode_get, fsl_xcvr_mode_put); + +/** phy: true => phy, false => pll */ +static int fsl_xcvr_ai_write(struct fsl_xcvr *xcvr, u8 reg, u32 data, bool phy) +{ + struct device *dev = &xcvr->pdev->dev; + u32 val, idx, tidx; + int ret; + + idx = BIT(phy ? 26 : 24); + tidx = BIT(phy ? 27 : 25); + + regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_CLR, 0xFF); + regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_SET, reg); + regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_WDATA, data); + regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_TOG, idx); + + ret = regmap_read_poll_timeout(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL, val, + (val & idx) == ((val & tidx) >> 1), + 10, 10000); + if (ret) + dev_err(dev, "AI timeout: failed to set %s reg 0x%02x=0x%08x\n", + phy ? "PHY" : "PLL", reg, data); + return ret; +} + +static int fsl_xcvr_en_phy_pll(struct fsl_xcvr *xcvr, u32 freq, bool tx) +{ + struct device *dev = &xcvr->pdev->dev; + u32 i, div = 0, log2; + int ret; + + for (i = 0; i < ARRAY_SIZE(fsl_xcvr_pll_cfg); i++) { + if (fsl_xcvr_pll_cfg[i].fout % freq == 0) { + div = fsl_xcvr_pll_cfg[i].fout / freq; + break; + } + } + + if (!div || i >= ARRAY_SIZE(fsl_xcvr_pll_cfg)) + return -EINVAL; + + log2 = ilog2(div); + + /* Release AI interface from reset */ + ret = regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_SET, + FSL_XCVR_PHY_AI_CTRL_AI_RESETN); + if (ret < 0) { + dev_err(dev, "Error while setting IER0: %d\n", ret); + return ret; + } + + /* PLL: BANDGAP_SET: EN_VBG (enable bandgap) */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_BANDGAP_SET, + FSL_XCVR_PLL_BANDGAP_EN_VBG, 0); + + /* PLL: CTRL0: DIV_INTEGER */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0, fsl_xcvr_pll_cfg[i].mfi, 0); + /* PLL: NUMERATOR: MFN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_NUM, fsl_xcvr_pll_cfg[i].mfn, 0); + /* PLL: DENOMINATOR: MFD */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_DEN, fsl_xcvr_pll_cfg[i].mfd, 0); + /* PLL: CTRL0_SET: HOLD_RING_OFF, POWER_UP */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET, + FSL_XCVR_PLL_CTRL0_HROFF | FSL_XCVR_PLL_CTRL0_PWP, 0); + udelay(25); + /* PLL: CTRL0: Clear Hold Ring Off */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_CLR, + FSL_XCVR_PLL_CTRL0_HROFF, 0); + udelay(100); + if (tx) { /* TX is enabled for SPDIF only */ + /* PLL: POSTDIV: PDIV0 */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_PDIV, + FSL_XCVR_PLL_PDIVx(log2, 0), 0); + /* PLL: CTRL_SET: CLKMUX0_EN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET, + FSL_XCVR_PLL_CTRL0_CM0_EN, 0); + } else if (xcvr->mode == FSL_XCVR_MODE_EARC) { /* eARC RX */ + /* PLL: POSTDIV: PDIV1 */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_PDIV, + FSL_XCVR_PLL_PDIVx(log2, 1), 0); + /* PLL: CTRL_SET: CLKMUX1_EN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET, + FSL_XCVR_PLL_CTRL0_CM1_EN, 0); + } else { /* SPDIF / ARC RX */ + /* PLL: POSTDIV: PDIV2 */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_PDIV, + FSL_XCVR_PLL_PDIVx(log2, 2), 0); + /* PLL: CTRL_SET: CLKMUX2_EN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET, + FSL_XCVR_PLL_CTRL0_CM2_EN, 0); + } + + if (xcvr->mode == FSL_XCVR_MODE_EARC) { /* eARC mode */ + /* PHY: CTRL_SET: TX_DIFF_OE, PHY_EN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET, + FSL_XCVR_PHY_CTRL_TSDIFF_OE | + FSL_XCVR_PHY_CTRL_PHY_EN, 1); + /* PHY: CTRL2_SET: EARC_TX_MODE */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL2_SET, + FSL_XCVR_PHY_CTRL2_EARC_TXMS, 1); + } else if (!tx) { /* SPDIF / ARC RX mode */ + if (xcvr->mode == FSL_XCVR_MODE_SPDIF) + /* PHY: CTRL_SET: SPDIF_EN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET, + FSL_XCVR_PHY_CTRL_SPDIF_EN, 1); + else /* PHY: CTRL_SET: ARC RX setup */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET, + FSL_XCVR_PHY_CTRL_PHY_EN | + FSL_XCVR_PHY_CTRL_RX_CM_EN | + fsl_xcvr_phy_arc_cfg[xcvr->arc_mode], 1); + } + + dev_dbg(dev, "PLL Fexp: %u, Fout: %u, mfi: %u, mfn: %u, mfd: %d, div: %u, pdiv0: %u\n", + freq, fsl_xcvr_pll_cfg[i].fout, fsl_xcvr_pll_cfg[i].mfi, + fsl_xcvr_pll_cfg[i].mfn, fsl_xcvr_pll_cfg[i].mfd, div, log2); + return 0; +} + +static int fsl_xcvr_en_aud_pll(struct fsl_xcvr *xcvr, u32 freq) +{ + struct device *dev = &xcvr->pdev->dev; + int ret; + + clk_disable_unprepare(xcvr->phy_clk); + ret = clk_set_rate(xcvr->phy_clk, freq); + if (ret < 0) { + dev_err(dev, "Error while setting AUD PLL rate: %d\n", ret); + return ret; + } + ret = clk_prepare_enable(xcvr->phy_clk); + if (ret) { + dev_err(dev, "failed to start PHY clock: %d\n", ret); + return ret; + } + + /* Release AI interface from reset */ + ret = regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_SET, + FSL_XCVR_PHY_AI_CTRL_AI_RESETN); + if (ret < 0) { + dev_err(dev, "Error while setting IER0: %d\n", ret); + return ret; + } + + if (xcvr->mode == FSL_XCVR_MODE_EARC) { /* eARC mode */ + /* PHY: CTRL_SET: TX_DIFF_OE, PHY_EN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET, + FSL_XCVR_PHY_CTRL_TSDIFF_OE | + FSL_XCVR_PHY_CTRL_PHY_EN, 1); + /* PHY: CTRL2_SET: EARC_TX_MODE */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL2_SET, + FSL_XCVR_PHY_CTRL2_EARC_TXMS, 1); + } else { /* SPDIF mode */ + /* PHY: CTRL_SET: TX_CLK_AUD_SS | SPDIF_EN */ + fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET, + FSL_XCVR_PHY_CTRL_TX_CLK_AUD_SS | + FSL_XCVR_PHY_CTRL_SPDIF_EN, 1); + } + + dev_dbg(dev, "PLL Fexp: %u\n", freq); + + return 0; +} + +#define FSL_XCVR_SPDIF_RX_FREQ 175000000 +static int fsl_xcvr_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + u32 m_ctl = 0, v_ctl = 0; + u32 r = substream->runtime->rate, ch = substream->runtime->channels; + u32 fout = 32 * r * ch * 10 * 2; + int ret = 0; + + switch (xcvr->mode) { + case FSL_XCVR_MODE_SPDIF: + case FSL_XCVR_MODE_ARC: + if (tx) { + ret = fsl_xcvr_en_aud_pll(xcvr, fout); + if (ret < 0) { + dev_err(dai->dev, "Failed to set TX freq %u: %d\n", + fout, ret); + return ret; + } + + ret = regmap_write(xcvr->regmap, FSL_XCVR_TX_DPTH_CTRL_SET, + FSL_XCVR_TX_DPTH_CTRL_FRM_FMT); + if (ret < 0) { + dev_err(dai->dev, "Failed to set TX_DPTH: %d\n", ret); + return ret; + } + + /** + * set SPDIF MODE - this flag is used to gate + * SPDIF output, useless for SPDIF RX + */ + m_ctl |= FSL_XCVR_EXT_CTRL_SPDIF_MODE; + v_ctl |= FSL_XCVR_EXT_CTRL_SPDIF_MODE; + } else { + /** + * Clear RX FIFO, flip RX FIFO bits, + * disable eARC related HW mode detects + */ + ret = regmap_write(xcvr->regmap, FSL_XCVR_RX_DPTH_CTRL_SET, + FSL_XCVR_RX_DPTH_CTRL_STORE_FMT | + FSL_XCVR_RX_DPTH_CTRL_CLR_RX_FIFO | + FSL_XCVR_RX_DPTH_CTRL_COMP | + FSL_XCVR_RX_DPTH_CTRL_LAYB_CTRL); + if (ret < 0) { + dev_err(dai->dev, "Failed to set RX_DPTH: %d\n", ret); + return ret; + } + + ret = fsl_xcvr_en_phy_pll(xcvr, FSL_XCVR_SPDIF_RX_FREQ, tx); + if (ret < 0) { + dev_err(dai->dev, "Failed to set RX freq %u: %d\n", + FSL_XCVR_SPDIF_RX_FREQ, ret); + return ret; + } + } + break; + case FSL_XCVR_MODE_EARC: + if (!tx) { + /** Clear RX FIFO, flip RX FIFO bits */ + ret = regmap_write(xcvr->regmap, FSL_XCVR_RX_DPTH_CTRL_SET, + FSL_XCVR_RX_DPTH_CTRL_STORE_FMT | + FSL_XCVR_RX_DPTH_CTRL_CLR_RX_FIFO); + if (ret < 0) { + dev_err(dai->dev, "Failed to set RX_DPTH: %d\n", ret); + return ret; + } + + /** Enable eARC related HW mode detects */ + ret = regmap_write(xcvr->regmap, FSL_XCVR_RX_DPTH_CTRL_CLR, + FSL_XCVR_RX_DPTH_CTRL_COMP | + FSL_XCVR_RX_DPTH_CTRL_LAYB_CTRL); + if (ret < 0) { + dev_err(dai->dev, "Failed to clr TX_DPTH: %d\n", ret); + return ret; + } + } + + /* clear CMDC RESET */ + m_ctl |= FSL_XCVR_EXT_CTRL_CMDC_RESET(tx); + /* set TX_RX_MODE */ + m_ctl |= FSL_XCVR_EXT_CTRL_TX_RX_MODE; + v_ctl |= (tx ? FSL_XCVR_EXT_CTRL_TX_RX_MODE : 0); + break; + } + + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0, + FSL_XCVR_IRQ_EARC_ALL, FSL_XCVR_IRQ_EARC_ALL); + if (ret < 0) { + dev_err(dai->dev, "Error while setting IER0: %d\n", ret); + return ret; + } + + /* set DPATH RESET */ + m_ctl |= FSL_XCVR_EXT_CTRL_DPTH_RESET(tx); + v_ctl |= FSL_XCVR_EXT_CTRL_DPTH_RESET(tx); + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, m_ctl, v_ctl); + if (ret < 0) { + dev_err(dai->dev, "Error while setting EXT_CTRL: %d\n", ret); + return ret; + } + + return 0; +} + +static int fsl_xcvr_constr(const struct snd_pcm_substream *substream, + const struct snd_pcm_hw_constraint_list *channels, + const struct snd_pcm_hw_constraint_list *rates) +{ + struct snd_pcm_runtime *rt = substream->runtime; + int ret; + + ret = snd_pcm_hw_constraint_list(rt, 0, SNDRV_PCM_HW_PARAM_CHANNELS, + channels); + if (ret < 0) + return ret; + + ret = snd_pcm_hw_constraint_list(rt, 0, SNDRV_PCM_HW_PARAM_RATE, + rates); + if (ret < 0) + return ret; + + return 0; +} + +static int fsl_xcvr_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int ret = 0; + + if (xcvr->streams & BIT(substream->stream)) { + dev_err(dai->dev, "%sX busy\n", tx ? "T" : "R"); + return -EBUSY; + } + + switch (xcvr->mode) { + case FSL_XCVR_MODE_SPDIF: + case FSL_XCVR_MODE_ARC: + ret = fsl_xcvr_constr(substream, &fsl_xcvr_spdif_channels_constr, + &fsl_xcvr_spdif_rates_constr); + break; + case FSL_XCVR_MODE_EARC: + ret = fsl_xcvr_constr(substream, &fsl_xcvr_earc_channels_constr, + &fsl_xcvr_earc_rates_constr); + break; + } + if (ret < 0) + return ret; + + xcvr->streams |= BIT(substream->stream); + + /* Disable XCVR controls if there is stream started */ + fsl_xcvr_activate_ctl(dai, fsl_xcvr_mode_kctl.name, false); + fsl_xcvr_activate_ctl(dai, fsl_xcvr_arc_mode_kctl.name, false); + fsl_xcvr_activate_ctl(dai, fsl_xcvr_earc_capds_kctl.name, false); + + return 0; +} + +static void fsl_xcvr_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + u32 mask = 0, val = 0; + int ret; + + xcvr->streams &= ~BIT(substream->stream); + + /* Enable XCVR controls if there is no stream started */ + if (!xcvr->streams) { + fsl_xcvr_activate_ctl(dai, fsl_xcvr_mode_kctl.name, true); + fsl_xcvr_activate_ctl(dai, fsl_xcvr_arc_mode_kctl.name, + (xcvr->mode == FSL_XCVR_MODE_ARC)); + fsl_xcvr_activate_ctl(dai, fsl_xcvr_earc_capds_kctl.name, + (xcvr->mode == FSL_XCVR_MODE_EARC)); + + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0, + FSL_XCVR_IRQ_EARC_ALL, 0); + if (ret < 0) { + dev_err(dai->dev, "Failed to set IER0: %d\n", ret); + return; + } + + /* clear SPDIF MODE */ + if (xcvr->mode == FSL_XCVR_MODE_SPDIF) + mask |= FSL_XCVR_EXT_CTRL_SPDIF_MODE; + } + + if (xcvr->mode == FSL_XCVR_MODE_EARC) { + /* set CMDC RESET */ + mask |= FSL_XCVR_EXT_CTRL_CMDC_RESET(tx); + val |= FSL_XCVR_EXT_CTRL_CMDC_RESET(tx); + } + + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, mask, val); + if (ret < 0) { + dev_err(dai->dev, "Err setting DPATH RESET: %d\n", ret); + return; + } +} + +static int fsl_xcvr_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int ret; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + if (tx) { + switch (xcvr->mode) { + case FSL_XCVR_MODE_EARC: + /* set isr_cmdc_tx_en, w1c */ + ret = regmap_write(xcvr->regmap, + FSL_XCVR_ISR_SET, + FSL_XCVR_ISR_CMDC_TX_EN); + if (ret < 0) { + dev_err(dai->dev, "err updating isr %d\n", ret); + return ret; + } + fallthrough; + case FSL_XCVR_MODE_SPDIF: + ret = regmap_write(xcvr->regmap, + FSL_XCVR_TX_DPTH_CTRL_SET, + FSL_XCVR_TX_DPTH_CTRL_STRT_DATA_TX); + if (ret < 0) { + dev_err(dai->dev, "Failed to start DATA_TX: %d\n", ret); + return ret; + } + break; + } + } + + /* enable DMA RD/WR */ + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, + FSL_XCVR_EXT_CTRL_DMA_DIS(tx), 0); + if (ret < 0) { + dev_err(dai->dev, "Failed to enable DMA: %d\n", ret); + return ret; + } + + /* clear DPATH RESET */ + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, + FSL_XCVR_EXT_CTRL_DPTH_RESET(tx), + 0); + if (ret < 0) { + dev_err(dai->dev, "Failed to clear DPATH RESET: %d\n", ret); + return ret; + } + + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + /* disable DMA RD/WR */ + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, + FSL_XCVR_EXT_CTRL_DMA_DIS(tx), + FSL_XCVR_EXT_CTRL_DMA_DIS(tx)); + if (ret < 0) { + dev_err(dai->dev, "Failed to disable DMA: %d\n", ret); + return ret; + } + + if (tx) { + switch (xcvr->mode) { + case FSL_XCVR_MODE_SPDIF: + ret = regmap_write(xcvr->regmap, + FSL_XCVR_TX_DPTH_CTRL_CLR, + FSL_XCVR_TX_DPTH_CTRL_STRT_DATA_TX); + if (ret < 0) { + dev_err(dai->dev, "Failed to stop DATA_TX: %d\n", ret); + return ret; + } + fallthrough; + case FSL_XCVR_MODE_EARC: + /* clear ISR_CMDC_TX_EN, W1C */ + ret = regmap_write(xcvr->regmap, + FSL_XCVR_ISR_CLR, + FSL_XCVR_ISR_CMDC_TX_EN); + if (ret < 0) { + dev_err(dai->dev, + "Err updating ISR %d\n", ret); + return ret; + } + break; + } + } + break; + default: + return -EINVAL; + } + + return 0; +} + +static int fsl_xcvr_load_firmware(struct fsl_xcvr *xcvr) +{ + struct device *dev = &xcvr->pdev->dev; + const struct firmware *fw; + int ret = 0, rem, off, out, page = 0, size = FSL_XCVR_REG_OFFSET; + u32 mask, val; + + ret = request_firmware(&fw, xcvr->soc_data->fw_name, dev); + if (ret) { + dev_err(dev, "failed to request firmware.\n"); + return ret; + } + + rem = fw->size; + + /* RAM is 20KiB = 16KiB code + 4KiB data => max 10 pages 2KiB each */ + if (rem > 16384) { + dev_err(dev, "FW size %d is bigger than 16KiB.\n", rem); + release_firmware(fw); + return -ENOMEM; + } + + for (page = 0; page < 10; page++) { + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, + FSL_XCVR_EXT_CTRL_PAGE_MASK, + FSL_XCVR_EXT_CTRL_PAGE(page)); + if (ret < 0) { + dev_err(dev, "FW: failed to set page %d, err=%d\n", + page, ret); + goto err_firmware; + } + + off = page * size; + out = min(rem, size); + /* IPG clock is assumed to be running, otherwise it will hang */ + if (out > 0) { + /* write firmware into code memory */ + memcpy_toio(xcvr->ram_addr, fw->data + off, out); + rem -= out; + if (rem == 0) { + /* last part of firmware written */ + /* clean remaining part of code memory page */ + memset_io(xcvr->ram_addr + out, 0, size - out); + } + } else { + /* clean current page, including data memory */ + memset_io(xcvr->ram_addr, 0, size); + } + } + +err_firmware: + release_firmware(fw); + if (ret < 0) + return ret; + + /* configure watermarks */ + mask = FSL_XCVR_EXT_CTRL_RX_FWM_MASK | FSL_XCVR_EXT_CTRL_TX_FWM_MASK; + val = FSL_XCVR_EXT_CTRL_RX_FWM(FSL_XCVR_FIFO_WMK_RX); + val |= FSL_XCVR_EXT_CTRL_TX_FWM(FSL_XCVR_FIFO_WMK_TX); + /* disable DMA RD/WR */ + mask |= FSL_XCVR_EXT_CTRL_DMA_RD_DIS | FSL_XCVR_EXT_CTRL_DMA_WR_DIS; + val |= FSL_XCVR_EXT_CTRL_DMA_RD_DIS | FSL_XCVR_EXT_CTRL_DMA_WR_DIS; + /* Data RAM is 4KiB, last two pages: 8 and 9. Select page 8. */ + mask |= FSL_XCVR_EXT_CTRL_PAGE_MASK; + val |= FSL_XCVR_EXT_CTRL_PAGE(8); + + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, mask, val); + if (ret < 0) { + dev_err(dev, "Failed to set watermarks: %d\n", ret); + return ret; + } + + /* Store Capabilities Data Structure into Data RAM */ + memcpy_toio(xcvr->ram_addr + FSL_XCVR_CAP_DATA_STR, xcvr->cap_ds, + FSL_XCVR_CAPDS_SIZE); + return 0; +} + +static int fsl_xcvr_type_iec958_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; + uinfo->count = 1; + + return 0; +} + +static int fsl_xcvr_type_iec958_bytes_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; + uinfo->count = sizeof_field(struct snd_aes_iec958, status); + + return 0; +} + +static int fsl_xcvr_rx_cs_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + memcpy(ucontrol->value.iec958.status, xcvr->rx_iec958.status, 24); + + return 0; +} + +static int fsl_xcvr_tx_cs_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + memcpy(ucontrol->value.iec958.status, xcvr->tx_iec958.status, 24); + + return 0; +} + +static int fsl_xcvr_tx_cs_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol); + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + memcpy(xcvr->tx_iec958.status, ucontrol->value.iec958.status, 24); + + return 0; +} + +static struct snd_kcontrol_new fsl_xcvr_rx_ctls[] = { + /* Channel status controller */ + { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT), + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = fsl_xcvr_type_iec958_info, + .get = fsl_xcvr_rx_cs_get, + }, + /* Capture channel status, bytes */ + { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "Capture Channel Status", + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = fsl_xcvr_type_iec958_bytes_info, + .get = fsl_xcvr_rx_cs_get, + }, +}; + +static struct snd_kcontrol_new fsl_xcvr_tx_ctls[] = { + /* Channel status controller */ + { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = fsl_xcvr_type_iec958_info, + .get = fsl_xcvr_tx_cs_get, + .put = fsl_xcvr_tx_cs_put, + }, + /* Playback channel status, bytes */ + { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "Playback Channel Status", + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .info = fsl_xcvr_type_iec958_bytes_info, + .get = fsl_xcvr_tx_cs_get, + .put = fsl_xcvr_tx_cs_put, + }, +}; + +static const struct snd_soc_dai_ops fsl_xcvr_dai_ops = { + .prepare = fsl_xcvr_prepare, + .startup = fsl_xcvr_startup, + .shutdown = fsl_xcvr_shutdown, + .trigger = fsl_xcvr_trigger, +}; + +static int fsl_xcvr_dai_probe(struct snd_soc_dai *dai) +{ + struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai); + + snd_soc_dai_init_dma_data(dai, &xcvr->dma_prms_tx, &xcvr->dma_prms_rx); + + snd_soc_add_dai_controls(dai, &fsl_xcvr_mode_kctl, 1); + snd_soc_add_dai_controls(dai, &fsl_xcvr_arc_mode_kctl, 1); + snd_soc_add_dai_controls(dai, &fsl_xcvr_earc_capds_kctl, 1); + snd_soc_add_dai_controls(dai, fsl_xcvr_tx_ctls, + ARRAY_SIZE(fsl_xcvr_tx_ctls)); + snd_soc_add_dai_controls(dai, fsl_xcvr_rx_ctls, + ARRAY_SIZE(fsl_xcvr_rx_ctls)); + return 0; +} + +static struct snd_soc_dai_driver fsl_xcvr_dai = { + .probe = fsl_xcvr_dai_probe, + .ops = &fsl_xcvr_dai_ops, + .playback = { + .stream_name = "CPU-Playback", + .channels_min = 1, + .channels_max = 32, + .rate_min = 32000, + .rate_max = 1536000, + .rates = SNDRV_PCM_RATE_KNOT, + .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE, + }, + .capture = { + .stream_name = "CPU-Capture", + .channels_min = 1, + .channels_max = 32, + .rate_min = 32000, + .rate_max = 1536000, + .rates = SNDRV_PCM_RATE_KNOT, + .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE, + }, +}; + +static const struct snd_soc_component_driver fsl_xcvr_comp = { + .name = "fsl-xcvr-dai", + .legacy_dai_naming = 1, +}; + +static const struct reg_default fsl_xcvr_reg_defaults[] = { + { FSL_XCVR_VERSION, 0x00000000 }, + { FSL_XCVR_EXT_CTRL, 0xF8204040 }, + { FSL_XCVR_EXT_STATUS, 0x00000000 }, + { FSL_XCVR_EXT_IER0, 0x00000000 }, + { FSL_XCVR_EXT_IER1, 0x00000000 }, + { FSL_XCVR_EXT_ISR, 0x00000000 }, + { FSL_XCVR_EXT_ISR_SET, 0x00000000 }, + { FSL_XCVR_EXT_ISR_CLR, 0x00000000 }, + { FSL_XCVR_EXT_ISR_TOG, 0x00000000 }, + { FSL_XCVR_IER, 0x00000000 }, + { FSL_XCVR_ISR, 0x00000000 }, + { FSL_XCVR_ISR_SET, 0x00000000 }, + { FSL_XCVR_ISR_CLR, 0x00000000 }, + { FSL_XCVR_ISR_TOG, 0x00000000 }, + { FSL_XCVR_RX_DPTH_CTRL, 0x00002C89 }, + { FSL_XCVR_RX_DPTH_CTRL_SET, 0x00002C89 }, + { FSL_XCVR_RX_DPTH_CTRL_CLR, 0x00002C89 }, + { FSL_XCVR_RX_DPTH_CTRL_TOG, 0x00002C89 }, + { FSL_XCVR_TX_DPTH_CTRL, 0x00000000 }, + { FSL_XCVR_TX_DPTH_CTRL_SET, 0x00000000 }, + { FSL_XCVR_TX_DPTH_CTRL_CLR, 0x00000000 }, + { FSL_XCVR_TX_DPTH_CTRL_TOG, 0x00000000 }, + { FSL_XCVR_TX_CS_DATA_0, 0x00000000 }, + { FSL_XCVR_TX_CS_DATA_1, 0x00000000 }, + { FSL_XCVR_TX_CS_DATA_2, 0x00000000 }, + { FSL_XCVR_TX_CS_DATA_3, 0x00000000 }, + { FSL_XCVR_TX_CS_DATA_4, 0x00000000 }, + { FSL_XCVR_TX_CS_DATA_5, 0x00000000 }, + { FSL_XCVR_DEBUG_REG_0, 0x00000000 }, + { FSL_XCVR_DEBUG_REG_1, 0x00000000 }, +}; + +static bool fsl_xcvr_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case FSL_XCVR_VERSION: + case FSL_XCVR_EXT_CTRL: + case FSL_XCVR_EXT_STATUS: + case FSL_XCVR_EXT_IER0: + case FSL_XCVR_EXT_IER1: + case FSL_XCVR_EXT_ISR: + case FSL_XCVR_EXT_ISR_SET: + case FSL_XCVR_EXT_ISR_CLR: + case FSL_XCVR_EXT_ISR_TOG: + case FSL_XCVR_IER: + case FSL_XCVR_ISR: + case FSL_XCVR_ISR_SET: + case FSL_XCVR_ISR_CLR: + case FSL_XCVR_ISR_TOG: + case FSL_XCVR_PHY_AI_CTRL: + case FSL_XCVR_PHY_AI_CTRL_SET: + case FSL_XCVR_PHY_AI_CTRL_CLR: + case FSL_XCVR_PHY_AI_CTRL_TOG: + case FSL_XCVR_PHY_AI_RDATA: + case FSL_XCVR_CLK_CTRL: + case FSL_XCVR_RX_DPTH_CTRL: + case FSL_XCVR_RX_DPTH_CTRL_SET: + case FSL_XCVR_RX_DPTH_CTRL_CLR: + case FSL_XCVR_RX_DPTH_CTRL_TOG: + case FSL_XCVR_TX_DPTH_CTRL: + case FSL_XCVR_TX_DPTH_CTRL_SET: + case FSL_XCVR_TX_DPTH_CTRL_CLR: + case FSL_XCVR_TX_DPTH_CTRL_TOG: + case FSL_XCVR_TX_CS_DATA_0: + case FSL_XCVR_TX_CS_DATA_1: + case FSL_XCVR_TX_CS_DATA_2: + case FSL_XCVR_TX_CS_DATA_3: + case FSL_XCVR_TX_CS_DATA_4: + case FSL_XCVR_TX_CS_DATA_5: + case FSL_XCVR_DEBUG_REG_0: + case FSL_XCVR_DEBUG_REG_1: + return true; + default: + return false; + } +} + +static bool fsl_xcvr_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case FSL_XCVR_EXT_CTRL: + case FSL_XCVR_EXT_IER0: + case FSL_XCVR_EXT_IER1: + case FSL_XCVR_EXT_ISR: + case FSL_XCVR_EXT_ISR_SET: + case FSL_XCVR_EXT_ISR_CLR: + case FSL_XCVR_EXT_ISR_TOG: + case FSL_XCVR_IER: + case FSL_XCVR_ISR_SET: + case FSL_XCVR_ISR_CLR: + case FSL_XCVR_ISR_TOG: + case FSL_XCVR_PHY_AI_CTRL: + case FSL_XCVR_PHY_AI_CTRL_SET: + case FSL_XCVR_PHY_AI_CTRL_CLR: + case FSL_XCVR_PHY_AI_CTRL_TOG: + case FSL_XCVR_PHY_AI_WDATA: + case FSL_XCVR_CLK_CTRL: + case FSL_XCVR_RX_DPTH_CTRL: + case FSL_XCVR_RX_DPTH_CTRL_SET: + case FSL_XCVR_RX_DPTH_CTRL_CLR: + case FSL_XCVR_RX_DPTH_CTRL_TOG: + case FSL_XCVR_TX_DPTH_CTRL_SET: + case FSL_XCVR_TX_DPTH_CTRL_CLR: + case FSL_XCVR_TX_DPTH_CTRL_TOG: + case FSL_XCVR_TX_CS_DATA_0: + case FSL_XCVR_TX_CS_DATA_1: + case FSL_XCVR_TX_CS_DATA_2: + case FSL_XCVR_TX_CS_DATA_3: + case FSL_XCVR_TX_CS_DATA_4: + case FSL_XCVR_TX_CS_DATA_5: + return true; + default: + return false; + } +} + +static bool fsl_xcvr_volatile_reg(struct device *dev, unsigned int reg) +{ + return fsl_xcvr_readable_reg(dev, reg); +} + +static const struct regmap_config fsl_xcvr_regmap_cfg = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = FSL_XCVR_MAX_REG, + .reg_defaults = fsl_xcvr_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(fsl_xcvr_reg_defaults), + .readable_reg = fsl_xcvr_readable_reg, + .volatile_reg = fsl_xcvr_volatile_reg, + .writeable_reg = fsl_xcvr_writeable_reg, + .cache_type = REGCACHE_FLAT, +}; + +static irqreturn_t irq0_isr(int irq, void *devid) +{ + struct fsl_xcvr *xcvr = (struct fsl_xcvr *)devid; + struct device *dev = &xcvr->pdev->dev; + struct regmap *regmap = xcvr->regmap; + void __iomem *reg_ctrl, *reg_buff; + u32 isr, isr_clr = 0, val, i; + + regmap_read(regmap, FSL_XCVR_EXT_ISR, &isr); + + if (isr & FSL_XCVR_IRQ_NEW_CS) { + dev_dbg(dev, "Received new CS block\n"); + isr_clr |= FSL_XCVR_IRQ_NEW_CS; + /* Data RAM is 4KiB, last two pages: 8 and 9. Select page 8. */ + regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, + FSL_XCVR_EXT_CTRL_PAGE_MASK, + FSL_XCVR_EXT_CTRL_PAGE(8)); + + /* Find updated CS buffer */ + reg_ctrl = xcvr->ram_addr + FSL_XCVR_RX_CS_CTRL_0; + reg_buff = xcvr->ram_addr + FSL_XCVR_RX_CS_BUFF_0; + memcpy_fromio(&val, reg_ctrl, sizeof(val)); + if (!val) { + reg_ctrl = xcvr->ram_addr + FSL_XCVR_RX_CS_CTRL_1; + reg_buff = xcvr->ram_addr + FSL_XCVR_RX_CS_BUFF_1; + memcpy_fromio(&val, reg_ctrl, sizeof(val)); + } + + if (val) { + /* copy CS buffer */ + memcpy_fromio(&xcvr->rx_iec958.status, reg_buff, + sizeof(xcvr->rx_iec958.status)); + for (i = 0; i < 6; i++) { + val = *(u32 *)(xcvr->rx_iec958.status + i*4); + *(u32 *)(xcvr->rx_iec958.status + i*4) = + bitrev32(val); + } + /* clear CS control register */ + memset_io(reg_ctrl, 0, sizeof(val)); + } + } + if (isr & FSL_XCVR_IRQ_NEW_UD) { + dev_dbg(dev, "Received new UD block\n"); + isr_clr |= FSL_XCVR_IRQ_NEW_UD; + } + if (isr & FSL_XCVR_IRQ_MUTE) { + dev_dbg(dev, "HW mute bit detected\n"); + isr_clr |= FSL_XCVR_IRQ_MUTE; + } + if (isr & FSL_XCVR_IRQ_FIFO_UOFL_ERR) { + dev_dbg(dev, "RX/TX FIFO full/empty\n"); + isr_clr |= FSL_XCVR_IRQ_FIFO_UOFL_ERR; + } + if (isr & FSL_XCVR_IRQ_ARC_MODE) { + dev_dbg(dev, "CMDC SM falls out of eARC mode\n"); + isr_clr |= FSL_XCVR_IRQ_ARC_MODE; + } + if (isr & FSL_XCVR_IRQ_DMA_RD_REQ) { + dev_dbg(dev, "DMA read request\n"); + isr_clr |= FSL_XCVR_IRQ_DMA_RD_REQ; + } + if (isr & FSL_XCVR_IRQ_DMA_WR_REQ) { + dev_dbg(dev, "DMA write request\n"); + isr_clr |= FSL_XCVR_IRQ_DMA_WR_REQ; + } + + if (isr_clr) { + regmap_write(regmap, FSL_XCVR_EXT_ISR_CLR, isr_clr); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static const struct fsl_xcvr_soc_data fsl_xcvr_imx8mp_data = { + .fw_name = "imx/xcvr/xcvr-imx8mp.bin", +}; + +static const struct of_device_id fsl_xcvr_dt_ids[] = { + { .compatible = "fsl,imx8mp-xcvr", .data = &fsl_xcvr_imx8mp_data }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, fsl_xcvr_dt_ids); + +static int fsl_xcvr_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct fsl_xcvr *xcvr; + struct resource *rx_res, *tx_res; + void __iomem *regs; + int ret, irq; + + xcvr = devm_kzalloc(dev, sizeof(*xcvr), GFP_KERNEL); + if (!xcvr) + return -ENOMEM; + + xcvr->pdev = pdev; + xcvr->soc_data = of_device_get_match_data(&pdev->dev); + + xcvr->ipg_clk = devm_clk_get(dev, "ipg"); + if (IS_ERR(xcvr->ipg_clk)) { + dev_err(dev, "failed to get ipg clock\n"); + return PTR_ERR(xcvr->ipg_clk); + } + + xcvr->phy_clk = devm_clk_get(dev, "phy"); + if (IS_ERR(xcvr->phy_clk)) { + dev_err(dev, "failed to get phy clock\n"); + return PTR_ERR(xcvr->phy_clk); + } + + xcvr->spba_clk = devm_clk_get(dev, "spba"); + if (IS_ERR(xcvr->spba_clk)) { + dev_err(dev, "failed to get spba clock\n"); + return PTR_ERR(xcvr->spba_clk); + } + + xcvr->pll_ipg_clk = devm_clk_get(dev, "pll_ipg"); + if (IS_ERR(xcvr->pll_ipg_clk)) { + dev_err(dev, "failed to get pll_ipg clock\n"); + return PTR_ERR(xcvr->pll_ipg_clk); + } + + xcvr->ram_addr = devm_platform_ioremap_resource_byname(pdev, "ram"); + if (IS_ERR(xcvr->ram_addr)) + return PTR_ERR(xcvr->ram_addr); + + regs = devm_platform_ioremap_resource_byname(pdev, "regs"); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + xcvr->regmap = devm_regmap_init_mmio_clk(dev, NULL, regs, + &fsl_xcvr_regmap_cfg); + if (IS_ERR(xcvr->regmap)) { + dev_err(dev, "failed to init XCVR regmap: %ld\n", + PTR_ERR(xcvr->regmap)); + return PTR_ERR(xcvr->regmap); + } + + xcvr->reset = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(xcvr->reset)) { + dev_err(dev, "failed to get XCVR reset control\n"); + return PTR_ERR(xcvr->reset); + } + + /* get IRQs */ + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_irq(dev, irq, irq0_isr, 0, pdev->name, xcvr); + if (ret) { + dev_err(dev, "failed to claim IRQ0: %i\n", ret); + return ret; + } + + rx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rxfifo"); + tx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "txfifo"); + if (!rx_res || !tx_res) { + dev_err(dev, "could not find rxfifo or txfifo resource\n"); + return -EINVAL; + } + xcvr->dma_prms_rx.chan_name = "rx"; + xcvr->dma_prms_tx.chan_name = "tx"; + xcvr->dma_prms_rx.addr = rx_res->start; + xcvr->dma_prms_tx.addr = tx_res->start; + xcvr->dma_prms_rx.maxburst = FSL_XCVR_MAXBURST_RX; + xcvr->dma_prms_tx.maxburst = FSL_XCVR_MAXBURST_TX; + + platform_set_drvdata(pdev, xcvr); + pm_runtime_enable(dev); + regcache_cache_only(xcvr->regmap, true); + + /* + * Register platform component before registering cpu dai for there + * is not defer probe for platform component in snd_soc_add_pcm_runtime(). + */ + ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0); + if (ret) { + pm_runtime_disable(dev); + dev_err(dev, "failed to pcm register\n"); + return ret; + } + + ret = devm_snd_soc_register_component(dev, &fsl_xcvr_comp, + &fsl_xcvr_dai, 1); + if (ret) { + pm_runtime_disable(dev); + dev_err(dev, "failed to register component %s\n", + fsl_xcvr_comp.name); + } + + return ret; +} + +static int fsl_xcvr_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + return 0; +} + +static __maybe_unused int fsl_xcvr_runtime_suspend(struct device *dev) +{ + struct fsl_xcvr *xcvr = dev_get_drvdata(dev); + int ret; + + /* + * Clear interrupts, when streams starts or resumes after + * suspend, interrupts are enabled in prepare(), so no need + * to enable interrupts in resume(). + */ + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0, + FSL_XCVR_IRQ_EARC_ALL, 0); + if (ret < 0) + dev_err(dev, "Failed to clear IER0: %d\n", ret); + + /* Assert M0+ reset */ + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, + FSL_XCVR_EXT_CTRL_CORE_RESET, + FSL_XCVR_EXT_CTRL_CORE_RESET); + if (ret < 0) + dev_err(dev, "Failed to assert M0+ core: %d\n", ret); + + regcache_cache_only(xcvr->regmap, true); + + clk_disable_unprepare(xcvr->spba_clk); + clk_disable_unprepare(xcvr->phy_clk); + clk_disable_unprepare(xcvr->pll_ipg_clk); + clk_disable_unprepare(xcvr->ipg_clk); + + return 0; +} + +static __maybe_unused int fsl_xcvr_runtime_resume(struct device *dev) +{ + struct fsl_xcvr *xcvr = dev_get_drvdata(dev); + int ret; + + ret = reset_control_assert(xcvr->reset); + if (ret < 0) { + dev_err(dev, "Failed to assert M0+ reset: %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(xcvr->ipg_clk); + if (ret) { + dev_err(dev, "failed to start IPG clock.\n"); + return ret; + } + + ret = clk_prepare_enable(xcvr->pll_ipg_clk); + if (ret) { + dev_err(dev, "failed to start PLL IPG clock.\n"); + goto stop_ipg_clk; + } + + ret = clk_prepare_enable(xcvr->phy_clk); + if (ret) { + dev_err(dev, "failed to start PHY clock: %d\n", ret); + goto stop_pll_ipg_clk; + } + + ret = clk_prepare_enable(xcvr->spba_clk); + if (ret) { + dev_err(dev, "failed to start SPBA clock.\n"); + goto stop_phy_clk; + } + + regcache_cache_only(xcvr->regmap, false); + regcache_mark_dirty(xcvr->regmap); + ret = regcache_sync(xcvr->regmap); + + if (ret) { + dev_err(dev, "failed to sync regcache.\n"); + goto stop_spba_clk; + } + + ret = reset_control_deassert(xcvr->reset); + if (ret) { + dev_err(dev, "failed to deassert M0+ reset.\n"); + goto stop_spba_clk; + } + + ret = fsl_xcvr_load_firmware(xcvr); + if (ret) { + dev_err(dev, "failed to load firmware.\n"); + goto stop_spba_clk; + } + + /* Release M0+ reset */ + ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, + FSL_XCVR_EXT_CTRL_CORE_RESET, 0); + if (ret < 0) { + dev_err(dev, "M0+ core release failed: %d\n", ret); + goto stop_spba_clk; + } + + /* Let M0+ core complete firmware initialization */ + msleep(50); + + return 0; + +stop_spba_clk: + clk_disable_unprepare(xcvr->spba_clk); +stop_phy_clk: + clk_disable_unprepare(xcvr->phy_clk); +stop_pll_ipg_clk: + clk_disable_unprepare(xcvr->pll_ipg_clk); +stop_ipg_clk: + clk_disable_unprepare(xcvr->ipg_clk); + + return ret; +} + +static const struct dev_pm_ops fsl_xcvr_pm_ops = { + SET_RUNTIME_PM_OPS(fsl_xcvr_runtime_suspend, + fsl_xcvr_runtime_resume, + NULL) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static struct platform_driver fsl_xcvr_driver = { + .probe = fsl_xcvr_probe, + .driver = { + .name = "fsl,imx8mp-audio-xcvr", + .pm = &fsl_xcvr_pm_ops, + .of_match_table = fsl_xcvr_dt_ids, + }, + .remove = fsl_xcvr_remove, +}; +module_platform_driver(fsl_xcvr_driver); + +MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>"); +MODULE_DESCRIPTION("NXP Audio Transceiver (XCVR) driver"); +MODULE_LICENSE("GPL v2"); |