diff options
Diffstat (limited to 'sound/soc/samsung/i2s.c')
| -rw-r--r-- | sound/soc/samsung/i2s.c | 1711 |
1 files changed, 1711 insertions, 0 deletions
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c new file mode 100644 index 000000000..9505200f3 --- /dev/null +++ b/sound/soc/samsung/i2s.c @@ -0,0 +1,1711 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// ALSA SoC Audio Layer - Samsung I2S Controller driver +// +// Copyright (c) 2010 Samsung Electronics Co. Ltd. +// Jaswinder Singh <jassisinghbrar@gmail.com> + +#include <dt-bindings/sound/samsung-i2s.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/pm_runtime.h> + +#include <sound/soc.h> +#include <sound/pcm_params.h> + +#include <linux/platform_data/asoc-s3c.h> + +#include "dma.h" +#include "idma.h" +#include "i2s.h" +#include "i2s-regs.h" + +#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) + +#define SAMSUNG_I2S_ID_PRIMARY 1 +#define SAMSUNG_I2S_ID_SECONDARY 2 + +struct samsung_i2s_variant_regs { + unsigned int bfs_off; + unsigned int rfs_off; + unsigned int sdf_off; + unsigned int txr_off; + unsigned int rclksrc_off; + unsigned int mss_off; + unsigned int cdclkcon_off; + unsigned int lrp_off; + unsigned int bfs_mask; + unsigned int rfs_mask; + unsigned int ftx0cnt_off; +}; + +struct samsung_i2s_dai_data { + u32 quirks; + unsigned int pcm_rates; + const struct samsung_i2s_variant_regs *i2s_variant_regs; +}; + +struct i2s_dai { + /* Platform device for this DAI */ + struct platform_device *pdev; + + /* Frame clock */ + unsigned frmclk; + /* + * Specifically requested RCLK, BCLK by machine driver. + * 0 indicates CPU driver is free to choose any value. + */ + unsigned rfs, bfs; + /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ + struct i2s_dai *pri_dai; + /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */ + struct i2s_dai *sec_dai; + +#define DAI_OPENED (1 << 0) /* DAI is opened */ +#define DAI_MANAGER (1 << 1) /* DAI is the manager */ + unsigned mode; + + /* Driver for this DAI */ + struct snd_soc_dai_driver *drv; + + /* DMA parameters */ + struct snd_dmaengine_dai_dma_data dma_playback; + struct snd_dmaengine_dai_dma_data dma_capture; + struct snd_dmaengine_dai_dma_data idma_playback; + dma_filter_fn filter; + + struct samsung_i2s_priv *priv; +}; + +struct samsung_i2s_priv { + struct platform_device *pdev; + struct platform_device *pdev_sec; + + /* Lock for cross interface checks */ + spinlock_t pcm_lock; + + /* CPU DAIs and their corresponding drivers */ + struct i2s_dai *dai; + struct snd_soc_dai_driver *dai_drv; + int num_dais; + + /* The I2S controller's core clock */ + struct clk *clk; + + /* Clock for generating I2S signals */ + struct clk *op_clk; + + /* Rate of RCLK source clock */ + unsigned long rclk_srcrate; + + /* Cache of selected I2S registers for system suspend */ + u32 suspend_i2smod; + u32 suspend_i2scon; + u32 suspend_i2spsr; + + const struct samsung_i2s_variant_regs *variant_regs; + u32 quirks; + + /* The clock provider's data */ + struct clk *clk_table[3]; + struct clk_onecell_data clk_data; + + /* Spinlock protecting member fields below */ + spinlock_t lock; + + /* Memory mapped SFR region */ + void __iomem *addr; + + /* A flag indicating the I2S slave mode operation */ + bool slave_mode; +}; + +/* Returns true if this is the 'overlay' stereo DAI */ +static inline bool is_secondary(struct i2s_dai *i2s) +{ + return i2s->drv->id == SAMSUNG_I2S_ID_SECONDARY; +} + +/* If this interface of the controller is transmitting data */ +static inline bool tx_active(struct i2s_dai *i2s) +{ + u32 active; + + if (!i2s) + return false; + + active = readl(i2s->priv->addr + I2SCON); + + if (is_secondary(i2s)) + active &= CON_TXSDMA_ACTIVE; + else + active &= CON_TXDMA_ACTIVE; + + return active ? true : false; +} + +/* Return pointer to the other DAI */ +static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s) +{ + return i2s->pri_dai ? : i2s->sec_dai; +} + +/* If the other interface of the controller is transmitting data */ +static inline bool other_tx_active(struct i2s_dai *i2s) +{ + struct i2s_dai *other = get_other_dai(i2s); + + return tx_active(other); +} + +/* If any interface of the controller is transmitting data */ +static inline bool any_tx_active(struct i2s_dai *i2s) +{ + return tx_active(i2s) || other_tx_active(i2s); +} + +/* If this interface of the controller is receiving data */ +static inline bool rx_active(struct i2s_dai *i2s) +{ + u32 active; + + if (!i2s) + return false; + + active = readl(i2s->priv->addr + I2SCON) & CON_RXDMA_ACTIVE; + + return active ? true : false; +} + +/* If the other interface of the controller is receiving data */ +static inline bool other_rx_active(struct i2s_dai *i2s) +{ + struct i2s_dai *other = get_other_dai(i2s); + + return rx_active(other); +} + +/* If any interface of the controller is receiving data */ +static inline bool any_rx_active(struct i2s_dai *i2s) +{ + return rx_active(i2s) || other_rx_active(i2s); +} + +/* If the other DAI is transmitting or receiving data */ +static inline bool other_active(struct i2s_dai *i2s) +{ + return other_rx_active(i2s) || other_tx_active(i2s); +} + +/* If this DAI is transmitting or receiving data */ +static inline bool this_active(struct i2s_dai *i2s) +{ + return tx_active(i2s) || rx_active(i2s); +} + +/* If the controller is active anyway */ +static inline bool any_active(struct i2s_dai *i2s) +{ + return this_active(i2s) || other_active(i2s); +} + +static inline struct i2s_dai *to_info(struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + + return &priv->dai[dai->id - 1]; +} + +static inline bool is_opened(struct i2s_dai *i2s) +{ + if (i2s && (i2s->mode & DAI_OPENED)) + return true; + else + return false; +} + +static inline bool is_manager(struct i2s_dai *i2s) +{ + if (is_opened(i2s) && (i2s->mode & DAI_MANAGER)) + return true; + else + return false; +} + +/* Read RCLK of I2S (in multiples of LRCLK) */ +static inline unsigned get_rfs(struct i2s_dai *i2s) +{ + struct samsung_i2s_priv *priv = i2s->priv; + u32 rfs; + + rfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->rfs_off; + rfs &= priv->variant_regs->rfs_mask; + + switch (rfs) { + case 7: return 192; + case 6: return 96; + case 5: return 128; + case 4: return 64; + case 3: return 768; + case 2: return 384; + case 1: return 512; + default: return 256; + } +} + +/* Write RCLK of I2S (in multiples of LRCLK) */ +static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs) +{ + struct samsung_i2s_priv *priv = i2s->priv; + u32 mod = readl(priv->addr + I2SMOD); + int rfs_shift = priv->variant_regs->rfs_off; + + mod &= ~(priv->variant_regs->rfs_mask << rfs_shift); + + switch (rfs) { + case 192: + mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift); + break; + case 96: + mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift); + break; + case 128: + mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift); + break; + case 64: + mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift); + break; + case 768: + mod |= (MOD_RCLK_768FS << rfs_shift); + break; + case 512: + mod |= (MOD_RCLK_512FS << rfs_shift); + break; + case 384: + mod |= (MOD_RCLK_384FS << rfs_shift); + break; + default: + mod |= (MOD_RCLK_256FS << rfs_shift); + break; + } + + writel(mod, priv->addr + I2SMOD); +} + +/* Read bit-clock of I2S (in multiples of LRCLK) */ +static inline unsigned get_bfs(struct i2s_dai *i2s) +{ + struct samsung_i2s_priv *priv = i2s->priv; + u32 bfs; + + bfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->bfs_off; + bfs &= priv->variant_regs->bfs_mask; + + switch (bfs) { + case 8: return 256; + case 7: return 192; + case 6: return 128; + case 5: return 96; + case 4: return 64; + case 3: return 24; + case 2: return 16; + case 1: return 48; + default: return 32; + } +} + +/* Write bit-clock of I2S (in multiples of LRCLK) */ +static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs) +{ + struct samsung_i2s_priv *priv = i2s->priv; + u32 mod = readl(priv->addr + I2SMOD); + int tdm = priv->quirks & QUIRK_SUPPORTS_TDM; + int bfs_shift = priv->variant_regs->bfs_off; + + /* Non-TDM I2S controllers do not support BCLK > 48 * FS */ + if (!tdm && bfs > 48) { + dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n"); + return; + } + + mod &= ~(priv->variant_regs->bfs_mask << bfs_shift); + + switch (bfs) { + case 48: + mod |= (MOD_BCLK_48FS << bfs_shift); + break; + case 32: + mod |= (MOD_BCLK_32FS << bfs_shift); + break; + case 24: + mod |= (MOD_BCLK_24FS << bfs_shift); + break; + case 16: + mod |= (MOD_BCLK_16FS << bfs_shift); + break; + case 64: + mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift); + break; + case 96: + mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift); + break; + case 128: + mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift); + break; + case 192: + mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift); + break; + case 256: + mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift); + break; + default: + dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); + return; + } + + writel(mod, priv->addr + I2SMOD); +} + +/* Sample size */ +static inline int get_blc(struct i2s_dai *i2s) +{ + int blc = readl(i2s->priv->addr + I2SMOD); + + blc = (blc >> 13) & 0x3; + + switch (blc) { + case 2: return 24; + case 1: return 8; + default: return 16; + } +} + +/* TX channel control */ +static void i2s_txctrl(struct i2s_dai *i2s, int on) +{ + struct samsung_i2s_priv *priv = i2s->priv; + void __iomem *addr = priv->addr; + int txr_off = priv->variant_regs->txr_off; + u32 con = readl(addr + I2SCON); + u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off); + + if (on) { + con |= CON_ACTIVE; + con &= ~CON_TXCH_PAUSE; + + if (is_secondary(i2s)) { + con |= CON_TXSDMA_ACTIVE; + con &= ~CON_TXSDMA_PAUSE; + } else { + con |= CON_TXDMA_ACTIVE; + con &= ~CON_TXDMA_PAUSE; + } + + if (any_rx_active(i2s)) + mod |= 2 << txr_off; + else + mod |= 0 << txr_off; + } else { + if (is_secondary(i2s)) { + con |= CON_TXSDMA_PAUSE; + con &= ~CON_TXSDMA_ACTIVE; + } else { + con |= CON_TXDMA_PAUSE; + con &= ~CON_TXDMA_ACTIVE; + } + + if (other_tx_active(i2s)) { + writel(con, addr + I2SCON); + return; + } + + con |= CON_TXCH_PAUSE; + + if (any_rx_active(i2s)) + mod |= 1 << txr_off; + else + con &= ~CON_ACTIVE; + } + + writel(mod, addr + I2SMOD); + writel(con, addr + I2SCON); +} + +/* RX Channel Control */ +static void i2s_rxctrl(struct i2s_dai *i2s, int on) +{ + struct samsung_i2s_priv *priv = i2s->priv; + void __iomem *addr = priv->addr; + int txr_off = priv->variant_regs->txr_off; + u32 con = readl(addr + I2SCON); + u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off); + + if (on) { + con |= CON_RXDMA_ACTIVE | CON_ACTIVE; + con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); + + if (any_tx_active(i2s)) + mod |= 2 << txr_off; + else + mod |= 1 << txr_off; + } else { + con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; + con &= ~CON_RXDMA_ACTIVE; + + if (any_tx_active(i2s)) + mod |= 0 << txr_off; + else + con &= ~CON_ACTIVE; + } + + writel(mod, addr + I2SMOD); + writel(con, addr + I2SCON); +} + +/* Flush FIFO of an interface */ +static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush) +{ + void __iomem *fic; + u32 val; + + if (!i2s) + return; + + if (is_secondary(i2s)) + fic = i2s->priv->addr + I2SFICS; + else + fic = i2s->priv->addr + I2SFIC; + + /* Flush the FIFO */ + writel(readl(fic) | flush, fic); + + /* Be patient */ + val = msecs_to_loops(1) / 1000; /* 1 usec */ + while (--val) + cpu_relax(); + + writel(readl(fic) & ~flush, fic); +} + +static int i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int rfs, + int dir) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + struct i2s_dai *other = get_other_dai(i2s); + const struct samsung_i2s_variant_regs *i2s_regs = priv->variant_regs; + unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off; + unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off; + u32 mod, mask, val = 0; + unsigned long flags; + int ret = 0; + + pm_runtime_get_sync(dai->dev); + + spin_lock_irqsave(&priv->lock, flags); + mod = readl(priv->addr + I2SMOD); + spin_unlock_irqrestore(&priv->lock, flags); + + switch (clk_id) { + case SAMSUNG_I2S_OPCLK: + mask = MOD_OPCLK_MASK; + val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK; + break; + case SAMSUNG_I2S_CDCLK: + mask = 1 << i2s_regs->cdclkcon_off; + /* Shouldn't matter in GATING(CLOCK_IN) mode */ + if (dir == SND_SOC_CLOCK_IN) + rfs = 0; + + if ((rfs && other && other->rfs && (other->rfs != rfs)) || + (any_active(i2s) && + (((dir == SND_SOC_CLOCK_IN) + && !(mod & cdcon_mask)) || + ((dir == SND_SOC_CLOCK_OUT) + && (mod & cdcon_mask))))) { + dev_err(&i2s->pdev->dev, + "%s:%d Other DAI busy\n", __func__, __LINE__); + ret = -EAGAIN; + goto err; + } + + if (dir == SND_SOC_CLOCK_IN) + val = 1 << i2s_regs->cdclkcon_off; + + i2s->rfs = rfs; + break; + + case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */ + case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */ + mask = 1 << i2s_regs->rclksrc_off; + + if ((priv->quirks & QUIRK_NO_MUXPSR) + || (clk_id == SAMSUNG_I2S_RCLKSRC_0)) + clk_id = 0; + else + clk_id = 1; + + if (!any_active(i2s)) { + if (priv->op_clk && !IS_ERR(priv->op_clk)) { + if ((clk_id && !(mod & rsrc_mask)) || + (!clk_id && (mod & rsrc_mask))) { + clk_disable_unprepare(priv->op_clk); + clk_put(priv->op_clk); + } else { + priv->rclk_srcrate = + clk_get_rate(priv->op_clk); + goto done; + } + } + + if (clk_id) + priv->op_clk = clk_get(&i2s->pdev->dev, + "i2s_opclk1"); + else + priv->op_clk = clk_get(&i2s->pdev->dev, + "i2s_opclk0"); + + if (WARN_ON(IS_ERR(priv->op_clk))) { + ret = PTR_ERR(priv->op_clk); + priv->op_clk = NULL; + goto err; + } + + ret = clk_prepare_enable(priv->op_clk); + if (ret) { + clk_put(priv->op_clk); + priv->op_clk = NULL; + goto err; + } + priv->rclk_srcrate = clk_get_rate(priv->op_clk); + + } else if ((!clk_id && (mod & rsrc_mask)) + || (clk_id && !(mod & rsrc_mask))) { + dev_err(&i2s->pdev->dev, + "%s:%d Other DAI busy\n", __func__, __LINE__); + ret = -EAGAIN; + goto err; + } else { + /* Call can't be on the active DAI */ + goto done; + } + + if (clk_id == 1) + val = 1 << i2s_regs->rclksrc_off; + break; + default: + dev_err(&i2s->pdev->dev, "We don't serve that!\n"); + ret = -EINVAL; + goto err; + } + + spin_lock_irqsave(&priv->lock, flags); + mod = readl(priv->addr + I2SMOD); + mod = (mod & ~mask) | val; + writel(mod, priv->addr + I2SMOD); + spin_unlock_irqrestore(&priv->lock, flags); +done: + pm_runtime_put(dai->dev); + + return 0; +err: + pm_runtime_put(dai->dev); + return ret; +} + +static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave; + u32 mod, tmp = 0; + unsigned long flags; + + lrp_shift = priv->variant_regs->lrp_off; + sdf_shift = priv->variant_regs->sdf_off; + mod_slave = 1 << priv->variant_regs->mss_off; + + sdf_mask = MOD_SDF_MASK << sdf_shift; + lrp_rlow = MOD_LR_RLOW << lrp_shift; + + /* Format is priority */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_RIGHT_J: + tmp |= lrp_rlow; + tmp |= (MOD_SDF_MSB << sdf_shift); + break; + case SND_SOC_DAIFMT_LEFT_J: + tmp |= lrp_rlow; + tmp |= (MOD_SDF_LSB << sdf_shift); + break; + case SND_SOC_DAIFMT_I2S: + tmp |= (MOD_SDF_IIS << sdf_shift); + break; + default: + dev_err(&i2s->pdev->dev, "Format not supported\n"); + return -EINVAL; + } + + /* + * INV flag is relative to the FORMAT flag - if set it simply + * flips the polarity specified by the Standard + */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_NB_IF: + if (tmp & lrp_rlow) + tmp &= ~lrp_rlow; + else + tmp |= lrp_rlow; + break; + default: + dev_err(&i2s->pdev->dev, "Polarity not supported\n"); + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_BC_FC: + tmp |= mod_slave; + break; + case SND_SOC_DAIFMT_BP_FP: + /* + * Set default source clock in Master mode, only when the + * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any + * clock configuration assigned in DT is not overwritten. + */ + if (priv->rclk_srcrate == 0 && priv->clk_data.clks == NULL) + i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0, + 0, SND_SOC_CLOCK_IN); + break; + default: + dev_err(&i2s->pdev->dev, "master/slave format not supported\n"); + return -EINVAL; + } + + pm_runtime_get_sync(dai->dev); + spin_lock_irqsave(&priv->lock, flags); + mod = readl(priv->addr + I2SMOD); + /* + * Don't change the I2S mode if any controller is active on this + * channel. + */ + if (any_active(i2s) && + ((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) { + spin_unlock_irqrestore(&priv->lock, flags); + pm_runtime_put(dai->dev); + dev_err(&i2s->pdev->dev, + "%s:%d Other DAI busy\n", __func__, __LINE__); + return -EAGAIN; + } + + mod &= ~(sdf_mask | lrp_rlow | mod_slave); + mod |= tmp; + writel(mod, priv->addr + I2SMOD); + priv->slave_mode = (mod & mod_slave); + spin_unlock_irqrestore(&priv->lock, flags); + pm_runtime_put(dai->dev); + + return 0; +} + +static int i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + u32 mod, mask = 0, val = 0; + struct clk *rclksrc; + unsigned long flags; + + WARN_ON(!pm_runtime_active(dai->dev)); + + if (!is_secondary(i2s)) + mask |= (MOD_DC2_EN | MOD_DC1_EN); + + switch (params_channels(params)) { + case 6: + val |= MOD_DC2_EN; + fallthrough; + case 4: + val |= MOD_DC1_EN; + break; + case 2: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s->dma_playback.addr_width = 4; + else + i2s->dma_capture.addr_width = 4; + break; + case 1: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s->dma_playback.addr_width = 2; + else + i2s->dma_capture.addr_width = 2; + + break; + default: + dev_err(&i2s->pdev->dev, "%d channels not supported\n", + params_channels(params)); + return -EINVAL; + } + + if (is_secondary(i2s)) + mask |= MOD_BLCS_MASK; + else + mask |= MOD_BLCP_MASK; + + if (is_manager(i2s)) + mask |= MOD_BLC_MASK; + + switch (params_width(params)) { + case 8: + if (is_secondary(i2s)) + val |= MOD_BLCS_8BIT; + else + val |= MOD_BLCP_8BIT; + if (is_manager(i2s)) + val |= MOD_BLC_8BIT; + break; + case 16: + if (is_secondary(i2s)) + val |= MOD_BLCS_16BIT; + else + val |= MOD_BLCP_16BIT; + if (is_manager(i2s)) + val |= MOD_BLC_16BIT; + break; + case 24: + if (is_secondary(i2s)) + val |= MOD_BLCS_24BIT; + else + val |= MOD_BLCP_24BIT; + if (is_manager(i2s)) + val |= MOD_BLC_24BIT; + break; + default: + dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", + params_format(params)); + return -EINVAL; + } + + spin_lock_irqsave(&priv->lock, flags); + mod = readl(priv->addr + I2SMOD); + mod = (mod & ~mask) | val; + writel(mod, priv->addr + I2SMOD); + spin_unlock_irqrestore(&priv->lock, flags); + + snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture); + + i2s->frmclk = params_rate(params); + + rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC]; + if (rclksrc && !IS_ERR(rclksrc)) + priv->rclk_srcrate = clk_get_rate(rclksrc); + + return 0; +} + +/* We set constraints on the substream according to the version of I2S */ +static int i2s_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + struct i2s_dai *other = get_other_dai(i2s); + unsigned long flags; + + pm_runtime_get_sync(dai->dev); + + spin_lock_irqsave(&priv->pcm_lock, flags); + + i2s->mode |= DAI_OPENED; + + if (is_manager(other)) + i2s->mode &= ~DAI_MANAGER; + else + i2s->mode |= DAI_MANAGER; + + if (!any_active(i2s) && (priv->quirks & QUIRK_NEED_RSTCLR)) + writel(CON_RSTCLR, i2s->priv->addr + I2SCON); + + spin_unlock_irqrestore(&priv->pcm_lock, flags); + + return 0; +} + +static void i2s_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + struct i2s_dai *other = get_other_dai(i2s); + unsigned long flags; + + spin_lock_irqsave(&priv->pcm_lock, flags); + + i2s->mode &= ~DAI_OPENED; + i2s->mode &= ~DAI_MANAGER; + + if (is_opened(other)) + other->mode |= DAI_MANAGER; + + /* Reset any constraint on RFS and BFS */ + i2s->rfs = 0; + i2s->bfs = 0; + + spin_unlock_irqrestore(&priv->pcm_lock, flags); + + pm_runtime_put(dai->dev); +} + +static int config_setup(struct i2s_dai *i2s) +{ + struct samsung_i2s_priv *priv = i2s->priv; + struct i2s_dai *other = get_other_dai(i2s); + unsigned rfs, bfs, blc; + u32 psr; + + blc = get_blc(i2s); + + bfs = i2s->bfs; + + if (!bfs && other) + bfs = other->bfs; + + /* Select least possible multiple(2) if no constraint set */ + if (!bfs) + bfs = blc * 2; + + rfs = i2s->rfs; + + if (!rfs && other) + rfs = other->rfs; + + if ((rfs == 256 || rfs == 512) && (blc == 24)) { + dev_err(&i2s->pdev->dev, + "%d-RFS not supported for 24-blc\n", rfs); + return -EINVAL; + } + + if (!rfs) { + if (bfs == 16 || bfs == 32) + rfs = 256; + else + rfs = 384; + } + + /* If already setup and running */ + if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) { + dev_err(&i2s->pdev->dev, + "%s:%d Other DAI busy\n", __func__, __LINE__); + return -EAGAIN; + } + + set_bfs(i2s, bfs); + set_rfs(i2s, rfs); + + /* Don't bother with PSR in Slave mode */ + if (priv->slave_mode) + return 0; + + if (!(priv->quirks & QUIRK_NO_MUXPSR)) { + psr = priv->rclk_srcrate / i2s->frmclk / rfs; + writel(((psr - 1) << 8) | PSR_PSREN, priv->addr + I2SPSR); + dev_dbg(&i2s->pdev->dev, + "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", + priv->rclk_srcrate, psr, rfs, bfs); + } + + return 0; +} + +static int i2s_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct i2s_dai *i2s = to_info(asoc_rtd_to_cpu(rtd, 0)); + unsigned long flags; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + pm_runtime_get_sync(dai->dev); + spin_lock_irqsave(&priv->lock, flags); + + if (config_setup(i2s)) { + spin_unlock_irqrestore(&priv->lock, flags); + return -EINVAL; + } + + if (capture) + i2s_rxctrl(i2s, 1); + else + i2s_txctrl(i2s, 1); + + spin_unlock_irqrestore(&priv->lock, flags); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + spin_lock_irqsave(&priv->lock, flags); + + if (capture) { + i2s_rxctrl(i2s, 0); + i2s_fifo(i2s, FIC_RXFLUSH); + } else { + i2s_txctrl(i2s, 0); + i2s_fifo(i2s, FIC_TXFLUSH); + } + + spin_unlock_irqrestore(&priv->lock, flags); + pm_runtime_put(dai->dev); + break; + } + + return 0; +} + +static int i2s_set_clkdiv(struct snd_soc_dai *dai, + int div_id, int div) +{ + struct i2s_dai *i2s = to_info(dai); + struct i2s_dai *other = get_other_dai(i2s); + + switch (div_id) { + case SAMSUNG_I2S_DIV_BCLK: + pm_runtime_get_sync(dai->dev); + if ((any_active(i2s) && div && (get_bfs(i2s) != div)) + || (other && other->bfs && (other->bfs != div))) { + pm_runtime_put(dai->dev); + dev_err(&i2s->pdev->dev, + "%s:%d Other DAI busy\n", __func__, __LINE__); + return -EAGAIN; + } + i2s->bfs = div; + pm_runtime_put(dai->dev); + break; + default: + dev_err(&i2s->pdev->dev, + "Invalid clock divider(%d)\n", div_id); + return -EINVAL; + } + + return 0; +} + +static snd_pcm_sframes_t +i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + u32 reg = readl(priv->addr + I2SFIC); + snd_pcm_sframes_t delay; + + WARN_ON(!pm_runtime_active(dai->dev)); + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + delay = FIC_RXCOUNT(reg); + else if (is_secondary(i2s)) + delay = FICS_TXCOUNT(readl(priv->addr + I2SFICS)); + else + delay = (reg >> priv->variant_regs->ftx0cnt_off) & 0x7f; + + return delay; +} + +#ifdef CONFIG_PM +static int i2s_suspend(struct snd_soc_component *component) +{ + return pm_runtime_force_suspend(component->dev); +} + +static int i2s_resume(struct snd_soc_component *component) +{ + return pm_runtime_force_resume(component->dev); +} +#else +#define i2s_suspend NULL +#define i2s_resume NULL +#endif + +static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + struct i2s_dai *other = get_other_dai(i2s); + unsigned long flags; + + pm_runtime_get_sync(dai->dev); + + if (is_secondary(i2s)) { + /* If this is probe on the secondary DAI */ + snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, NULL); + } else { + snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, + &i2s->dma_capture); + + if (priv->quirks & QUIRK_NEED_RSTCLR) + writel(CON_RSTCLR, priv->addr + I2SCON); + + if (priv->quirks & QUIRK_SUPPORTS_IDMA) + idma_reg_addr_init(priv->addr, + other->idma_playback.addr); + } + + /* Reset any constraint on RFS and BFS */ + i2s->rfs = 0; + i2s->bfs = 0; + + spin_lock_irqsave(&priv->lock, flags); + i2s_txctrl(i2s, 0); + i2s_rxctrl(i2s, 0); + i2s_fifo(i2s, FIC_TXFLUSH); + i2s_fifo(other, FIC_TXFLUSH); + i2s_fifo(i2s, FIC_RXFLUSH); + spin_unlock_irqrestore(&priv->lock, flags); + + /* Gate CDCLK by default */ + if (!is_opened(other)) + i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, + 0, SND_SOC_CLOCK_IN); + pm_runtime_put(dai->dev); + + return 0; +} + +static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) +{ + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); + struct i2s_dai *i2s = to_info(dai); + unsigned long flags; + + pm_runtime_get_sync(dai->dev); + + if (!is_secondary(i2s)) { + if (priv->quirks & QUIRK_NEED_RSTCLR) { + spin_lock_irqsave(&priv->lock, flags); + writel(0, priv->addr + I2SCON); + spin_unlock_irqrestore(&priv->lock, flags); + } + } + + pm_runtime_put(dai->dev); + + return 0; +} + +static const struct snd_soc_dai_ops samsung_i2s_dai_ops = { + .trigger = i2s_trigger, + .hw_params = i2s_hw_params, + .set_fmt = i2s_set_fmt, + .set_clkdiv = i2s_set_clkdiv, + .set_sysclk = i2s_set_sysclk, + .startup = i2s_startup, + .shutdown = i2s_shutdown, + .delay = i2s_delay, +}; + +static const struct snd_soc_dapm_widget samsung_i2s_widgets[] = { + /* Backend DAI */ + SND_SOC_DAPM_AIF_OUT("Mixer DAI TX", NULL, 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_IN("Mixer DAI RX", NULL, 0, SND_SOC_NOPM, 0, 0), + + /* Playback Mixer */ + SND_SOC_DAPM_MIXER("Playback Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), +}; + +static const struct snd_soc_dapm_route samsung_i2s_dapm_routes[] = { + { "Playback Mixer", NULL, "Primary Playback" }, + { "Playback Mixer", NULL, "Secondary Playback" }, + + { "Mixer DAI TX", NULL, "Playback Mixer" }, + { "Primary Capture", NULL, "Mixer DAI RX" }, +}; + +static const struct snd_soc_component_driver samsung_i2s_component = { + .name = "samsung-i2s", + + .dapm_widgets = samsung_i2s_widgets, + .num_dapm_widgets = ARRAY_SIZE(samsung_i2s_widgets), + + .dapm_routes = samsung_i2s_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(samsung_i2s_dapm_routes), + + .suspend = i2s_suspend, + .resume = i2s_resume, + + .legacy_dai_naming = 1, +}; + +#define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_S24_LE) + +static int i2s_alloc_dais(struct samsung_i2s_priv *priv, + const struct samsung_i2s_dai_data *i2s_dai_data, + int num_dais) +{ + static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" }; + static const char *stream_names[] = { "Primary Playback", + "Secondary Playback" }; + struct snd_soc_dai_driver *dai_drv; + int i; + + priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais, + sizeof(struct i2s_dai), GFP_KERNEL); + if (!priv->dai) + return -ENOMEM; + + priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais, + sizeof(*dai_drv), GFP_KERNEL); + if (!priv->dai_drv) + return -ENOMEM; + + for (i = 0; i < num_dais; i++) { + dai_drv = &priv->dai_drv[i]; + + dai_drv->probe = samsung_i2s_dai_probe; + dai_drv->remove = samsung_i2s_dai_remove; + + dai_drv->symmetric_rate = 1; + dai_drv->ops = &samsung_i2s_dai_ops; + + dai_drv->playback.channels_min = 1; + dai_drv->playback.channels_max = 2; + dai_drv->playback.rates = i2s_dai_data->pcm_rates; + dai_drv->playback.formats = SAMSUNG_I2S_FMTS; + dai_drv->playback.stream_name = stream_names[i]; + + dai_drv->id = i + 1; + dai_drv->name = dai_names[i]; + + priv->dai[i].drv = &priv->dai_drv[i]; + priv->dai[i].pdev = priv->pdev; + } + + /* Initialize capture only for the primary DAI */ + dai_drv = &priv->dai_drv[SAMSUNG_I2S_ID_PRIMARY - 1]; + + dai_drv->capture.channels_min = 1; + dai_drv->capture.channels_max = 2; + dai_drv->capture.rates = i2s_dai_data->pcm_rates; + dai_drv->capture.formats = SAMSUNG_I2S_FMTS; + dai_drv->capture.stream_name = "Primary Capture"; + + return 0; +} + +#ifdef CONFIG_PM +static int i2s_runtime_suspend(struct device *dev) +{ + struct samsung_i2s_priv *priv = dev_get_drvdata(dev); + + priv->suspend_i2smod = readl(priv->addr + I2SMOD); + priv->suspend_i2scon = readl(priv->addr + I2SCON); + priv->suspend_i2spsr = readl(priv->addr + I2SPSR); + + clk_disable_unprepare(priv->op_clk); + clk_disable_unprepare(priv->clk); + + return 0; +} + +static int i2s_runtime_resume(struct device *dev) +{ + struct samsung_i2s_priv *priv = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(priv->clk); + if (ret) + return ret; + + if (priv->op_clk) { + ret = clk_prepare_enable(priv->op_clk); + if (ret) { + clk_disable_unprepare(priv->clk); + return ret; + } + } + + writel(priv->suspend_i2scon, priv->addr + I2SCON); + writel(priv->suspend_i2smod, priv->addr + I2SMOD); + writel(priv->suspend_i2spsr, priv->addr + I2SPSR); + + return 0; +} +#endif /* CONFIG_PM */ + +static void i2s_unregister_clocks(struct samsung_i2s_priv *priv) +{ + int i; + + for (i = 0; i < priv->clk_data.clk_num; i++) { + if (!IS_ERR(priv->clk_table[i])) + clk_unregister(priv->clk_table[i]); + } +} + +static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv) +{ + of_clk_del_provider(priv->pdev->dev.of_node); + i2s_unregister_clocks(priv); +} + + +static int i2s_register_clock_provider(struct samsung_i2s_priv *priv) +{ + + const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" }; + const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" }; + const char *p_names[2] = { NULL }; + struct device *dev = &priv->pdev->dev; + const struct samsung_i2s_variant_regs *reg_info = priv->variant_regs; + const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)]; + struct clk *rclksrc; + int ret, i; + + /* Register the clock provider only if it's expected in the DTB */ + if (!of_find_property(dev->of_node, "#clock-cells", NULL)) + return 0; + + /* Get the RCLKSRC mux clock parent clock names */ + for (i = 0; i < ARRAY_SIZE(p_names); i++) { + rclksrc = clk_get(dev, clk_name[i]); + if (IS_ERR(rclksrc)) + continue; + p_names[i] = __clk_get_name(rclksrc); + clk_put(rclksrc); + } + + for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) { + i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s", + dev_name(dev), i2s_clk_desc[i]); + if (!i2s_clk_name[i]) + return -ENOMEM; + } + + if (!(priv->quirks & QUIRK_NO_MUXPSR)) { + /* Activate the prescaler */ + u32 val = readl(priv->addr + I2SPSR); + writel(val | PSR_PSREN, priv->addr + I2SPSR); + + priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev, + i2s_clk_name[CLK_I2S_RCLK_SRC], p_names, + ARRAY_SIZE(p_names), + CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT, + priv->addr + I2SMOD, reg_info->rclksrc_off, + 1, 0, &priv->lock); + + priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev, + i2s_clk_name[CLK_I2S_RCLK_PSR], + i2s_clk_name[CLK_I2S_RCLK_SRC], + CLK_SET_RATE_PARENT, + priv->addr + I2SPSR, 8, 6, 0, &priv->lock); + + p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR]; + priv->clk_data.clk_num = 2; + } + + priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev, + i2s_clk_name[CLK_I2S_CDCLK], p_names[0], + CLK_SET_RATE_PARENT, + priv->addr + I2SMOD, reg_info->cdclkcon_off, + CLK_GATE_SET_TO_DISABLE, &priv->lock); + + priv->clk_data.clk_num += 1; + priv->clk_data.clks = priv->clk_table; + + ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, + &priv->clk_data); + if (ret < 0) { + dev_err(dev, "failed to add clock provider: %d\n", ret); + i2s_unregister_clocks(priv); + } + + return ret; +} + +/* Create platform device for the secondary PCM */ +static int i2s_create_secondary_device(struct samsung_i2s_priv *priv) +{ + struct platform_device *pdev_sec; + const char *devname; + int ret; + + devname = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, "%s-sec", + dev_name(&priv->pdev->dev)); + if (!devname) + return -ENOMEM; + + pdev_sec = platform_device_alloc(devname, -1); + if (!pdev_sec) + return -ENOMEM; + + pdev_sec->driver_override = kstrdup("samsung-i2s", GFP_KERNEL); + if (!pdev_sec->driver_override) { + platform_device_put(pdev_sec); + return -ENOMEM; + } + + ret = platform_device_add(pdev_sec); + if (ret < 0) { + platform_device_put(pdev_sec); + return ret; + } + + ret = device_attach(&pdev_sec->dev); + if (ret <= 0) { + platform_device_unregister(priv->pdev_sec); + dev_info(&pdev_sec->dev, "device_attach() failed\n"); + return ret; + } + + priv->pdev_sec = pdev_sec; + + return 0; +} + +static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv) +{ + platform_device_unregister(priv->pdev_sec); + priv->pdev_sec = NULL; +} + +static int samsung_i2s_probe(struct platform_device *pdev) +{ + struct i2s_dai *pri_dai, *sec_dai = NULL; + struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data; + u32 regs_base, idma_addr = 0; + struct device_node *np = pdev->dev.of_node; + const struct samsung_i2s_dai_data *i2s_dai_data; + const struct platform_device_id *id; + struct samsung_i2s_priv *priv; + struct resource *res; + int num_dais, ret; + + if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { + i2s_dai_data = of_device_get_match_data(&pdev->dev); + } else { + id = platform_get_device_id(pdev); + + /* Nothing to do if it is the secondary device probe */ + if (!id) + return 0; + + i2s_dai_data = (struct samsung_i2s_dai_data *)id->driver_data; + } + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + if (np) { + priv->quirks = i2s_dai_data->quirks; + } else { + if (!i2s_pdata) { + dev_err(&pdev->dev, "Missing platform data\n"); + return -EINVAL; + } + priv->quirks = i2s_pdata->type.quirks; + } + + num_dais = (priv->quirks & QUIRK_SEC_DAI) ? 2 : 1; + priv->pdev = pdev; + priv->variant_regs = i2s_dai_data->i2s_variant_regs; + + ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais); + if (ret < 0) + return ret; + + pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1]; + + spin_lock_init(&priv->lock); + spin_lock_init(&priv->pcm_lock); + + if (!np) { + pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback; + pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture; + pri_dai->filter = i2s_pdata->dma_filter; + + idma_addr = i2s_pdata->type.idma_addr; + } else { + if (of_property_read_u32(np, "samsung,idma-addr", + &idma_addr)) { + if (priv->quirks & QUIRK_SUPPORTS_IDMA) { + dev_info(&pdev->dev, "idma address is not"\ + "specified"); + } + } + } + + priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(priv->addr)) + return PTR_ERR(priv->addr); + + regs_base = res->start; + + priv->clk = devm_clk_get(&pdev->dev, "iis"); + if (IS_ERR(priv->clk)) { + dev_err(&pdev->dev, "Failed to get iis clock\n"); + return PTR_ERR(priv->clk); + } + + ret = clk_prepare_enable(priv->clk); + if (ret != 0) { + dev_err(&pdev->dev, "failed to enable clock: %d\n", ret); + return ret; + } + pri_dai->dma_playback.addr = regs_base + I2STXD; + pri_dai->dma_capture.addr = regs_base + I2SRXD; + pri_dai->dma_playback.chan_name = "tx"; + pri_dai->dma_capture.chan_name = "rx"; + pri_dai->dma_playback.addr_width = 4; + pri_dai->dma_capture.addr_width = 4; + pri_dai->priv = priv; + + if (priv->quirks & QUIRK_PRI_6CHAN) + pri_dai->drv->playback.channels_max = 6; + + ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter, + "tx", "rx", NULL); + if (ret < 0) + goto err_disable_clk; + + if (priv->quirks & QUIRK_SEC_DAI) { + sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1]; + + sec_dai->dma_playback.addr = regs_base + I2STXDS; + sec_dai->dma_playback.chan_name = "tx-sec"; + + if (!np) { + sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec; + sec_dai->filter = i2s_pdata->dma_filter; + } + + sec_dai->dma_playback.addr_width = 4; + sec_dai->idma_playback.addr = idma_addr; + sec_dai->pri_dai = pri_dai; + sec_dai->priv = priv; + pri_dai->sec_dai = sec_dai; + + ret = i2s_create_secondary_device(priv); + if (ret < 0) + goto err_disable_clk; + + ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev, + sec_dai->filter, "tx-sec", NULL, + &pdev->dev); + if (ret < 0) + goto err_del_sec; + + } + + if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { + dev_err(&pdev->dev, "Unable to configure gpio\n"); + ret = -EINVAL; + goto err_del_sec; + } + + dev_set_drvdata(&pdev->dev, priv); + + ret = devm_snd_soc_register_component(&pdev->dev, + &samsung_i2s_component, + priv->dai_drv, num_dais); + if (ret < 0) + goto err_del_sec; + + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + ret = i2s_register_clock_provider(priv); + if (ret < 0) + goto err_disable_pm; + + priv->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]); + + return 0; + +err_disable_pm: + pm_runtime_disable(&pdev->dev); +err_del_sec: + i2s_delete_secondary_device(priv); +err_disable_clk: + clk_disable_unprepare(priv->clk); + return ret; +} + +static int samsung_i2s_remove(struct platform_device *pdev) +{ + struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev); + + /* The secondary device has no driver data assigned */ + if (!priv) + return 0; + + pm_runtime_get_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + i2s_unregister_clock_provider(priv); + i2s_delete_secondary_device(priv); + clk_disable_unprepare(priv->clk); + + pm_runtime_put_noidle(&pdev->dev); + + return 0; +} + +static const struct samsung_i2s_variant_regs i2sv3_regs = { + .bfs_off = 1, + .rfs_off = 3, + .sdf_off = 5, + .txr_off = 8, + .rclksrc_off = 10, + .mss_off = 11, + .cdclkcon_off = 12, + .lrp_off = 7, + .bfs_mask = 0x3, + .rfs_mask = 0x3, + .ftx0cnt_off = 8, +}; + +static const struct samsung_i2s_variant_regs i2sv6_regs = { + .bfs_off = 0, + .rfs_off = 4, + .sdf_off = 6, + .txr_off = 8, + .rclksrc_off = 10, + .mss_off = 11, + .cdclkcon_off = 12, + .lrp_off = 15, + .bfs_mask = 0xf, + .rfs_mask = 0x3, + .ftx0cnt_off = 8, +}; + +static const struct samsung_i2s_variant_regs i2sv7_regs = { + .bfs_off = 0, + .rfs_off = 4, + .sdf_off = 7, + .txr_off = 9, + .rclksrc_off = 11, + .mss_off = 12, + .cdclkcon_off = 22, + .lrp_off = 15, + .bfs_mask = 0xf, + .rfs_mask = 0x7, + .ftx0cnt_off = 0, +}; + +static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = { + .bfs_off = 0, + .rfs_off = 3, + .sdf_off = 6, + .txr_off = 8, + .rclksrc_off = 10, + .mss_off = 11, + .cdclkcon_off = 12, + .lrp_off = 15, + .bfs_mask = 0x7, + .rfs_mask = 0x7, + .ftx0cnt_off = 8, +}; + +static const struct samsung_i2s_dai_data i2sv3_dai_type = { + .quirks = QUIRK_NO_MUXPSR, + .pcm_rates = SNDRV_PCM_RATE_8000_96000, + .i2s_variant_regs = &i2sv3_regs, +}; + +static const struct samsung_i2s_dai_data i2sv5_dai_type __maybe_unused = { + .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | + QUIRK_SUPPORTS_IDMA, + .pcm_rates = SNDRV_PCM_RATE_8000_96000, + .i2s_variant_regs = &i2sv3_regs, +}; + +static const struct samsung_i2s_dai_data i2sv6_dai_type __maybe_unused = { + .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | + QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA, + .pcm_rates = SNDRV_PCM_RATE_8000_96000, + .i2s_variant_regs = &i2sv6_regs, +}; + +static const struct samsung_i2s_dai_data i2sv7_dai_type __maybe_unused = { + .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | + QUIRK_SUPPORTS_TDM, + .pcm_rates = SNDRV_PCM_RATE_8000_192000, + .i2s_variant_regs = &i2sv7_regs, +}; + +static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 __maybe_unused = { + .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR, + .pcm_rates = SNDRV_PCM_RATE_8000_96000, + .i2s_variant_regs = &i2sv5_i2s1_regs, +}; + +static const struct platform_device_id samsung_i2s_driver_ids[] = { + { + .name = "samsung-i2s", + .driver_data = (kernel_ulong_t)&i2sv3_dai_type, + }, + {}, +}; +MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids); + +#ifdef CONFIG_OF +static const struct of_device_id exynos_i2s_match[] = { + { + .compatible = "samsung,s3c6410-i2s", + .data = &i2sv3_dai_type, + }, { + .compatible = "samsung,s5pv210-i2s", + .data = &i2sv5_dai_type, + }, { + .compatible = "samsung,exynos5420-i2s", + .data = &i2sv6_dai_type, + }, { + .compatible = "samsung,exynos7-i2s", + .data = &i2sv7_dai_type, + }, { + .compatible = "samsung,exynos7-i2s1", + .data = &i2sv5_dai_type_i2s1, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, exynos_i2s_match); +#endif + +static const struct dev_pm_ops samsung_i2s_pm = { + SET_RUNTIME_PM_OPS(i2s_runtime_suspend, + i2s_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static struct platform_driver samsung_i2s_driver = { + .probe = samsung_i2s_probe, + .remove = samsung_i2s_remove, + .id_table = samsung_i2s_driver_ids, + .driver = { + .name = "samsung-i2s", + .of_match_table = of_match_ptr(exynos_i2s_match), + .pm = &samsung_i2s_pm, + }, +}; + +module_platform_driver(samsung_i2s_driver); + +/* Module information */ +MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>"); +MODULE_DESCRIPTION("Samsung I2S Interface"); +MODULE_ALIAS("platform:samsung-i2s"); +MODULE_LICENSE("GPL"); |