/* sound/soc/samsung/i2s.c * * ALSA SoC Audio Layer - Samsung I2S Controller driver * * Copyright (c) 2010 Samsung Electronics Co. Ltd. * Jaswinder Singh * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "dma.h" #include "idma.h" #include "i2s.h" #include "i2s-regs.h" #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) enum samsung_dai_type { TYPE_PRI, TYPE_SEC, }; struct samsung_i2s_dai_data { int dai_type; }; struct i2s_dai { /* Platform device for this DAI */ struct platform_device *pdev; /* IOREMAP'd SFRs */ void __iomem *addr; /* Physical base address of SFRs */ u32 base; /* Rate of RCLK source clock */ unsigned long rclk_srcrate; /* Frame Clock */ unsigned frmclk; /* * Specifically requested RCLK,BCLK by MACHINE Driver. * 0 indicates CPU driver is free to choose any value. */ unsigned rfs, bfs; /* I2S Controller's core clock */ struct clk *clk; /* Clock for generating I2S signals */ struct clk *op_clk; /* 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 i2s_dai_drv; /* DMA parameters */ struct s3c_dma_params dma_playback; struct s3c_dma_params dma_capture; struct s3c_dma_params idma_playback; u32 quirks; u32 suspend_i2smod; u32 suspend_i2scon; u32 suspend_i2spsr; unsigned long gpios[7]; /* i2s gpio line numbers */ }; /* Lock for cross i/f checks */ static DEFINE_SPINLOCK(lock); /* If this is the 'overlay' stereo DAI */ static inline bool is_secondary(struct i2s_dai *i2s) { return i2s->pri_dai ? true : false; } /* If operating in SoC-Slave mode */ static inline bool is_slave(struct i2s_dai *i2s) { return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false; } /* 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->addr + I2SCON); if (is_secondary(i2s)) active &= CON_TXSDMA_ACTIVE; else active &= CON_TXDMA_ACTIVE; return active ? true : false; } /* If the other interface of the controller is transmitting data */ static inline bool other_tx_active(struct i2s_dai *i2s) { struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 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->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 = i2s->pri_dai ? : i2s->sec_dai; 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) { return snd_soc_dai_get_drvdata(dai); } 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) { u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3; switch (rfs) { 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) { u32 mod = readl(i2s->addr + I2SMOD); mod &= ~MOD_RCLK_MASK; switch (rfs) { case 768: mod |= MOD_RCLK_768FS; break; case 512: mod |= MOD_RCLK_512FS; break; case 384: mod |= MOD_RCLK_384FS; break; default: mod |= MOD_RCLK_256FS; break; } writel(mod, i2s->addr + I2SMOD); } /* Read Bit-Clock of I2S (in multiples of LRCLK) */ static inline unsigned get_bfs(struct i2s_dai *i2s) { u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3; switch (bfs) { 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) { u32 mod = readl(i2s->addr + I2SMOD); mod &= ~MOD_BCLK_MASK; switch (bfs) { case 48: mod |= MOD_BCLK_48FS; break; case 32: mod |= MOD_BCLK_32FS; break; case 24: mod |= MOD_BCLK_24FS; break; case 16: mod |= MOD_BCLK_16FS; break; default: dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); return; } writel(mod, i2s->addr + I2SMOD); } /* Sample-Size */ static inline int get_blc(struct i2s_dai *i2s) { int blc = readl(i2s->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) { void __iomem *addr = i2s->addr; u32 con = readl(addr + I2SCON); u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; 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 |= MOD_TXRX; else mod |= MOD_TXONLY; } 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 |= MOD_RXONLY; 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) { void __iomem *addr = i2s->addr; u32 con = readl(addr + I2SCON); u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; if (on) { con |= CON_RXDMA_ACTIVE | CON_ACTIVE; con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); if (any_tx_active(i2s)) mod |= MOD_TXRX; else mod |= MOD_RXONLY; } else { con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; con &= ~CON_RXDMA_ACTIVE; if (any_tx_active(i2s)) mod |= MOD_TXONLY; 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->addr + I2SFICS; else fic = i2s->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 i2s_dai *i2s = to_info(dai); struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; u32 mod = readl(i2s->addr + I2SMOD); switch (clk_id) { case SAMSUNG_I2S_CDCLK: /* Shouldn't matter in GATING(CLOCK_IN) mode */ if (dir == SND_SOC_CLOCK_IN) rfs = 0; if ((rfs && other->rfs && (other->rfs != rfs)) || (any_active(i2s) && (((dir == SND_SOC_CLOCK_IN) && !(mod & MOD_CDCLKCON)) || ((dir == SND_SOC_CLOCK_OUT) && (mod & MOD_CDCLKCON))))) { dev_err(&i2s->pdev->dev, "%s:%d Other DAI busy\n", __func__, __LINE__); return -EAGAIN; } if (dir == SND_SOC_CLOCK_IN) mod |= MOD_CDCLKCON; else mod &= ~MOD_CDCLKCON; 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 */ if ((i2s->quirks & QUIRK_NO_MUXPSR) || (clk_id == SAMSUNG_I2S_RCLKSRC_0)) clk_id = 0; else clk_id = 1; if (!any_active(i2s)) { if (i2s->op_clk) { if ((clk_id && !(mod & MOD_IMS_SYSMUX)) || (!clk_id && (mod & MOD_IMS_SYSMUX))) { clk_disable_unprepare(i2s->op_clk); clk_put(i2s->op_clk); } else { i2s->rclk_srcrate = clk_get_rate(i2s->op_clk); return 0; } } if (clk_id) i2s->op_clk = clk_get(&i2s->pdev->dev, "i2s_opclk1"); else i2s->op_clk = clk_get(&i2s->pdev->dev, "i2s_opclk0"); clk_prepare_enable(i2s->op_clk); i2s->rclk_srcrate = clk_get_rate(i2s->op_clk); /* Over-ride the other's */ if (other) { other->op_clk = i2s->op_clk; other->rclk_srcrate = i2s->rclk_srcrate; } } else if ((!clk_id && (mod & MOD_IMS_SYSMUX)) || (clk_id && !(mod & MOD_IMS_SYSMUX))) { dev_err(&i2s->pdev->dev, "%s:%d Other DAI busy\n", __func__, __LINE__); return -EAGAIN; } else { /* Call can't be on the active DAI */ i2s->op_clk = other->op_clk; i2s->rclk_srcrate = other->rclk_srcrate; return 0; } if (clk_id == 0) mod &= ~MOD_IMS_SYSMUX; else mod |= MOD_IMS_SYSMUX; break; default: dev_err(&i2s->pdev->dev, "We don't serve that!\n"); return -EINVAL; } writel(mod, i2s->addr + I2SMOD); return 0; } static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct i2s_dai *i2s = to_info(dai); u32 mod = readl(i2s->addr + I2SMOD); u32 tmp = 0; /* Format is priority */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_RIGHT_J: tmp |= MOD_LR_RLOW; tmp |= MOD_SDF_MSB; break; case SND_SOC_DAIFMT_LEFT_J: tmp |= MOD_LR_RLOW; tmp |= MOD_SDF_LSB; break; case SND_SOC_DAIFMT_I2S: tmp |= MOD_SDF_IIS; 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 & MOD_LR_RLOW) tmp &= ~MOD_LR_RLOW; else tmp |= MOD_LR_RLOW; break; default: dev_err(&i2s->pdev->dev, "Polarity not supported\n"); return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: tmp |= MOD_SLAVE; break; case SND_SOC_DAIFMT_CBS_CFS: /* Set default source clock in Master mode */ if (i2s->rclk_srcrate == 0) 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; } if (any_active(i2s) && ((mod & (MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE)) != tmp)) { dev_err(&i2s->pdev->dev, "%s:%d Other DAI busy\n", __func__, __LINE__); return -EAGAIN; } mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE); mod |= tmp; writel(mod, i2s->addr + I2SMOD); return 0; } static int i2s_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct i2s_dai *i2s = to_info(dai); u32 mod = readl(i2s->addr + I2SMOD); if (!is_secondary(i2s)) mod &= ~(MOD_DC2_EN | MOD_DC1_EN); switch (params_channels(params)) { case 6: mod |= MOD_DC2_EN; case 4: mod |= MOD_DC1_EN; break; case 2: if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) i2s->dma_playback.dma_size = 4; else i2s->dma_capture.dma_size = 4; break; case 1: if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) i2s->dma_playback.dma_size = 2; else i2s->dma_capture.dma_size = 2; break; default: dev_err(&i2s->pdev->dev, "%d channels not supported\n", params_channels(params)); return -EINVAL; } if (is_secondary(i2s)) mod &= ~MOD_BLCS_MASK; else mod &= ~MOD_BLCP_MASK; if (is_manager(i2s)) mod &= ~MOD_BLC_MASK; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S8: if (is_secondary(i2s)) mod |= MOD_BLCS_8BIT; else mod |= MOD_BLCP_8BIT; if (is_manager(i2s)) mod |= MOD_BLC_8BIT; break; case SNDRV_PCM_FORMAT_S16_LE: if (is_secondary(i2s)) mod |= MOD_BLCS_16BIT; else mod |= MOD_BLCP_16BIT; if (is_manager(i2s)) mod |= MOD_BLC_16BIT; break; case SNDRV_PCM_FORMAT_S24_LE: if (is_secondary(i2s)) mod |= MOD_BLCS_24BIT; else mod |= MOD_BLCP_24BIT; if (is_manager(i2s)) mod |= MOD_BLC_24BIT; break; default: dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", params_format(params)); return -EINVAL; } writel(mod, i2s->addr + I2SMOD); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) snd_soc_dai_set_dma_data(dai, substream, (void *)&i2s->dma_playback); else snd_soc_dai_set_dma_data(dai, substream, (void *)&i2s->dma_capture); i2s->frmclk = params_rate(params); return 0; } /* We set constraints on the substream acc to the version of I2S */ static int i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct i2s_dai *i2s = to_info(dai); struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; unsigned long flags; spin_lock_irqsave(&lock, flags); i2s->mode |= DAI_OPENED; if (is_manager(other)) i2s->mode &= ~DAI_MANAGER; else i2s->mode |= DAI_MANAGER; /* Enforce set_sysclk in Master mode */ i2s->rclk_srcrate = 0; if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR)) writel(CON_RSTCLR, i2s->addr + I2SCON); spin_unlock_irqrestore(&lock, flags); return 0; } static void i2s_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct i2s_dai *i2s = to_info(dai); struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; unsigned long flags; spin_lock_irqsave(&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(&lock, flags); /* Gate CDCLK by default */ if (!is_opened(other)) i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 0, SND_SOC_CLOCK_IN); } static int config_setup(struct i2s_dai *i2s) { struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; 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; } /* Don't bother RFS, BFS & PSR in Slave mode */ if (is_slave(i2s)) return 0; set_bfs(i2s, bfs); set_rfs(i2s, rfs); if (!(i2s->quirks & QUIRK_NO_MUXPSR)) { psr = i2s->rclk_srcrate / i2s->frmclk / rfs; writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR); dev_dbg(&i2s->pdev->dev, "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", i2s->rclk_srcrate, psr, rfs, bfs); } return 0; } static int i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); struct snd_soc_pcm_runtime *rtd = substream->private_data; struct i2s_dai *i2s = to_info(rtd->cpu_dai); unsigned long flags; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: local_irq_save(flags); if (config_setup(i2s)) { local_irq_restore(flags); return -EINVAL; } if (capture) i2s_rxctrl(i2s, 1); else i2s_txctrl(i2s, 1); local_irq_restore(flags); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: local_irq_save(flags); if (capture) { i2s_rxctrl(i2s, 0); i2s_fifo(i2s, FIC_RXFLUSH); } else { i2s_txctrl(i2s, 0); i2s_fifo(i2s, FIC_TXFLUSH); } local_irq_restore(flags); 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 = i2s->pri_dai ? : i2s->sec_dai; switch (div_id) { case SAMSUNG_I2S_DIV_BCLK: if ((any_active(i2s) && div && (get_bfs(i2s) != div)) || (other && other->bfs && (other->bfs != div))) { dev_err(&i2s->pdev->dev, "%s:%d Other DAI busy\n", __func__, __LINE__); return -EAGAIN; } i2s->bfs = div; 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 i2s_dai *i2s = to_info(dai); u32 reg = readl(i2s->addr + I2SFIC); snd_pcm_sframes_t delay; if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) delay = FIC_RXCOUNT(reg); else if (is_secondary(i2s)) delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS)); else delay = FIC_TXCOUNT(reg); return delay; } #ifdef CONFIG_PM static int i2s_suspend(struct snd_soc_dai *dai) { struct i2s_dai *i2s = to_info(dai); if (dai->active) { i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); i2s->suspend_i2scon = readl(i2s->addr + I2SCON); i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); } return 0; } static int i2s_resume(struct snd_soc_dai *dai) { struct i2s_dai *i2s = to_info(dai); if (dai->active) { writel(i2s->suspend_i2scon, i2s->addr + I2SCON); writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); } return 0; } #else #define i2s_suspend NULL #define i2s_resume NULL #endif static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) { struct i2s_dai *i2s = to_info(dai); struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; if (other && other->clk) /* If this is probe on secondary */ goto probe_exit; i2s->addr = ioremap(i2s->base, 0x100); if (i2s->addr == NULL) { dev_err(&i2s->pdev->dev, "cannot ioremap registers\n"); return -ENXIO; } i2s->clk = clk_get(&i2s->pdev->dev, "iis"); if (IS_ERR(i2s->clk)) { dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n"); iounmap(i2s->addr); return -ENOENT; } clk_prepare_enable(i2s->clk); if (other) { other->addr = i2s->addr; other->clk = i2s->clk; } if (i2s->quirks & QUIRK_NEED_RSTCLR) writel(CON_RSTCLR, i2s->addr + I2SCON); if (i2s->quirks & QUIRK_SEC_DAI) idma_reg_addr_init(i2s->addr, i2s->sec_dai->idma_playback.dma_addr); probe_exit: /* Reset any constraint on RFS and BFS */ i2s->rfs = 0; i2s->bfs = 0; i2s_txctrl(i2s, 0); i2s_rxctrl(i2s, 0); i2s_fifo(i2s, FIC_TXFLUSH); i2s_fifo(other, FIC_TXFLUSH); i2s_fifo(i2s, FIC_RXFLUSH); /* Gate CDCLK by default */ if (!is_opened(other)) i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, 0, SND_SOC_CLOCK_IN); return 0; } static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) { struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai); struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; if (!other || !other->clk) { if (i2s->quirks & QUIRK_NEED_RSTCLR) writel(0, i2s->addr + I2SCON); clk_disable_unprepare(i2s->clk); clk_put(i2s->clk); iounmap(i2s->addr); } i2s->clk = NULL; 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, }; #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \ SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_S24_LE) static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec) { struct i2s_dai *i2s; i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL); if (i2s == NULL) return NULL; i2s->pdev = pdev; i2s->pri_dai = NULL; i2s->sec_dai = NULL; i2s->i2s_dai_drv.symmetric_rates = 1; i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe; i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove; i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops; i2s->i2s_dai_drv.suspend = i2s_suspend; i2s->i2s_dai_drv.resume = i2s_resume; i2s->i2s_dai_drv.playback.channels_min = 2; i2s->i2s_dai_drv.playback.channels_max = 2; i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES; i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS; if (!sec) { i2s->i2s_dai_drv.capture.channels_min = 1; i2s->i2s_dai_drv.capture.channels_max = 2; i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES; i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS; } else { /* Create a new platform_device for Secondary */ i2s->pdev = platform_device_register_resndata(NULL, "samsung-i2s-sec", -1, NULL, 0, NULL, 0); if (IS_ERR(i2s->pdev)) return NULL; } /* Pre-assign snd_soc_dai_set_drvdata */ dev_set_drvdata(&i2s->pdev->dev, i2s); return i2s; } #ifdef CONFIG_OF static int samsung_i2s_parse_dt_gpio(struct i2s_dai *i2s) { struct device *dev = &i2s->pdev->dev; int index, gpio, ret; for (index = 0; index < 7; index++) { gpio = of_get_gpio(dev->of_node, index); if (!gpio_is_valid(gpio)) { dev_err(dev, "invalid gpio[%d]: %d\n", index, gpio); goto free_gpio; } ret = gpio_request(gpio, dev_name(dev)); if (ret) { dev_err(dev, "gpio [%d] request failed\n", gpio); goto free_gpio; } i2s->gpios[index] = gpio; } return 0; free_gpio: while (--index >= 0) gpio_free(i2s->gpios[index]); return -EINVAL; } static void samsung_i2s_dt_gpio_free(struct i2s_dai *i2s) { unsigned int index; for (index = 0; index < 7; index++) gpio_free(i2s->gpios[index]); } #else static int samsung_i2s_parse_dt_gpio(struct i2s_dai *dai) { return -EINVAL; } static void samsung_i2s_dt_gpio_free(struct i2s_dai *dai) { } #endif static const struct of_device_id exynos_i2s_match[]; static inline int samsung_i2s_get_driver_data(struct platform_device *pdev) { #ifdef CONFIG_OF struct samsung_i2s_dai_data *data; if (pdev->dev.of_node) { const struct of_device_id *match; match = of_match_node(exynos_i2s_match, pdev->dev.of_node); data = (struct samsung_i2s_dai_data *) match->data; return data->dai_type; } else #endif return platform_get_device_id(pdev)->driver_data; } 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; struct samsung_i2s *i2s_cfg = NULL; struct resource *res; u32 regs_base, quirks = 0, idma_addr = 0; struct device_node *np = pdev->dev.of_node; enum samsung_dai_type samsung_dai_type; int ret = 0; /* Call during Seconday interface registration */ samsung_dai_type = samsung_i2s_get_driver_data(pdev); if (samsung_dai_type == TYPE_SEC) { sec_dai = dev_get_drvdata(&pdev->dev); snd_soc_register_dai(&sec_dai->pdev->dev, &sec_dai->i2s_dai_drv); asoc_dma_platform_register(&pdev->dev); return 0; } pri_dai = i2s_alloc_dai(pdev, false); if (!pri_dai) { dev_err(&pdev->dev, "Unable to alloc I2S_pri\n"); return -ENOMEM; } if (!np) { res = platform_get_resource(pdev, IORESOURCE_DMA, 0); if (!res) { dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n"); return -ENXIO; } pri_dai->dma_playback.channel = res->start; res = platform_get_resource(pdev, IORESOURCE_DMA, 1); if (!res) { dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n"); return -ENXIO; } pri_dai->dma_capture.channel = res->start; if (i2s_pdata == NULL) { dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n"); return -EINVAL; } if (&i2s_pdata->type) i2s_cfg = &i2s_pdata->type.i2s; if (i2s_cfg) { quirks = i2s_cfg->quirks; idma_addr = i2s_cfg->idma_addr; } } else { if (of_find_property(np, "samsung,supports-6ch", NULL)) quirks |= QUIRK_PRI_6CHAN; if (of_find_property(np, "samsung,supports-secdai", NULL)) quirks |= QUIRK_SEC_DAI; if (of_find_property(np, "samsung,supports-rstclr", NULL)) quirks |= QUIRK_NEED_RSTCLR; if (of_property_read_u32(np, "samsung,idma-addr", &idma_addr)) { if (quirks & QUIRK_SEC_DAI) { dev_err(&pdev->dev, "idma address is not"\ "specified"); return -EINVAL; } } } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); return -ENXIO; } if (!request_mem_region(res->start, resource_size(res), "samsung-i2s")) { dev_err(&pdev->dev, "Unable to request SFR region\n"); return -EBUSY; } regs_base = res->start; pri_dai->dma_playback.dma_addr = regs_base + I2STXD; pri_dai->dma_capture.dma_addr = regs_base + I2SRXD; pri_dai->dma_playback.client = (struct s3c2410_dma_client *)&pri_dai->dma_playback; pri_dai->dma_playback.ch_name = "tx"; pri_dai->dma_capture.client = (struct s3c2410_dma_client *)&pri_dai->dma_capture; pri_dai->dma_capture.ch_name = "rx"; pri_dai->dma_playback.dma_size = 4; pri_dai->dma_capture.dma_size = 4; pri_dai->base = regs_base; pri_dai->quirks = quirks; if (quirks & QUIRK_PRI_6CHAN) pri_dai->i2s_dai_drv.playback.channels_max = 6; if (quirks & QUIRK_SEC_DAI) { sec_dai = i2s_alloc_dai(pdev, true); if (!sec_dai) { dev_err(&pdev->dev, "Unable to alloc I2S_sec\n"); ret = -ENOMEM; goto err; } sec_dai->dma_playback.dma_addr = regs_base + I2STXDS; sec_dai->dma_playback.client = (struct s3c2410_dma_client *)&sec_dai->dma_playback; sec_dai->dma_playback.ch_name = "tx-sec"; if (!np) { res = platform_get_resource(pdev, IORESOURCE_DMA, 2); if (res) sec_dai->dma_playback.channel = res->start; } sec_dai->dma_playback.dma_size = 4; sec_dai->base = regs_base; sec_dai->quirks = quirks; sec_dai->idma_playback.dma_addr = idma_addr; sec_dai->pri_dai = pri_dai; pri_dai->sec_dai = sec_dai; } if (np) { if (samsung_i2s_parse_dt_gpio(pri_dai)) { dev_err(&pdev->dev, "Unable to configure gpio\n"); ret = -EINVAL; goto err; } } else { if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { dev_err(&pdev->dev, "Unable to configure gpio\n"); ret = -EINVAL; goto err; } } snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv); pm_runtime_enable(&pdev->dev); asoc_dma_platform_register(&pdev->dev); return 0; err: release_mem_region(regs_base, resource_size(res)); return ret; } static int samsung_i2s_remove(struct platform_device *pdev) { struct i2s_dai *i2s, *other; struct resource *res; struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data; i2s = dev_get_drvdata(&pdev->dev); other = i2s->pri_dai ? : i2s->sec_dai; if (!i2s_pdata->cfg_gpio && pdev->dev.of_node) samsung_i2s_dt_gpio_free(i2s->pri_dai); if (other) { other->pri_dai = NULL; other->sec_dai = NULL; } else { pm_runtime_disable(&pdev->dev); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res) release_mem_region(res->start, resource_size(res)); } i2s->pri_dai = NULL; i2s->sec_dai = NULL; asoc_dma_platform_unregister(&pdev->dev); snd_soc_unregister_dai(&pdev->dev); return 0; } static struct platform_device_id samsung_i2s_driver_ids[] = { { .name = "samsung-i2s", .driver_data = TYPE_PRI, }, { .name = "samsung-i2s-sec", .driver_data = TYPE_SEC, }, {}, }; MODULE_DEVICE_TABLE(platform, samsung-i2s-driver-ids); #ifdef CONFIG_OF static struct samsung_i2s_dai_data samsung_i2s_dai_data_array[] = { [TYPE_PRI] = { TYPE_PRI }, [TYPE_SEC] = { TYPE_SEC }, }; static const struct of_device_id exynos_i2s_match[] = { { .compatible = "samsung,i2s-v5", .data = &samsung_i2s_dai_data_array[TYPE_PRI], }, {}, }; MODULE_DEVICE_TABLE(of, exynos_i2s_match); #endif 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", .owner = THIS_MODULE, .of_match_table = of_match_ptr(exynos_i2s_match), }, }; module_platform_driver(samsung_i2s_driver); /* Module information */ MODULE_AUTHOR("Jaswinder Singh, "); MODULE_DESCRIPTION("Samsung I2S Interface"); MODULE_ALIAS("platform:samsung-i2s"); MODULE_LICENSE("GPL");