| /* sound/soc/samsung/i2s.c |
| * |
| * ALSA SoC Audio Layer - Samsung I2S Controller driver |
| * |
| * Copyright (c) 2010 Samsung Electronics Co. Ltd. |
| * Jaswinder Singh <jassisinghbrar@gmail.com> |
| * |
| * 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 <linux/delay.h> |
| #include <linux/slab.h> |
| #include <linux/clk.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/of.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) |
| |
| enum samsung_dai_type { |
| TYPE_PRI, |
| TYPE_SEC, |
| }; |
| |
| struct samsung_i2s_dai_data { |
| int dai_type; |
| u32 quirks; |
| }; |
| |
| 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; |
| |
| if (i2s->quirks & QUIRK_SUPPORTS_TDM) |
| rfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_RCLK_SHIFT; |
| else |
| rfs = (readl(i2s->addr + I2SMOD) >> MOD_RCLK_SHIFT); |
| rfs &= MOD_RCLK_MASK; |
| |
| 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); |
| int rfs_shift; |
| |
| if (i2s->quirks & QUIRK_SUPPORTS_TDM) |
| rfs_shift = EXYNOS5420_MOD_RCLK_SHIFT; |
| else |
| rfs_shift = MOD_RCLK_SHIFT; |
| mod &= ~(MOD_RCLK_MASK << rfs_shift); |
| |
| switch (rfs) { |
| 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, i2s->addr + I2SMOD); |
| } |
| |
| /* Read Bit-Clock of I2S (in multiples of LRCLK) */ |
| static inline unsigned get_bfs(struct i2s_dai *i2s) |
| { |
| u32 bfs; |
| |
| if (i2s->quirks & QUIRK_SUPPORTS_TDM) { |
| bfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_BCLK_SHIFT; |
| bfs &= EXYNOS5420_MOD_BCLK_MASK; |
| } else { |
| bfs = readl(i2s->addr + I2SMOD) >> MOD_BCLK_SHIFT; |
| bfs &= MOD_BCLK_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) |
| { |
| u32 mod = readl(i2s->addr + I2SMOD); |
| int bfs_shift; |
| int tdm = i2s->quirks & QUIRK_SUPPORTS_TDM; |
| |
| if (i2s->quirks & QUIRK_SUPPORTS_TDM) { |
| bfs_shift = EXYNOS5420_MOD_BCLK_SHIFT; |
| mod &= ~(EXYNOS5420_MOD_BCLK_MASK << bfs_shift); |
| } else { |
| bfs_shift = MOD_BCLK_SHIFT; |
| mod &= ~(MOD_BCLK_MASK << bfs_shift); |
| } |
| |
| /* Non-TDM I2S controllers do not support BCLK > 48 * FS */ |
| if (!tdm && bfs > 48) { |
| dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n"); |
| return; |
| } |
| |
| 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, 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_OPCLK: |
| mod &= ~MOD_OPCLK_MASK; |
| mod |= dir; |
| break; |
| 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 && !IS_ERR(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"); |
| |
| if (WARN_ON(IS_ERR(i2s->op_clk))) |
| return PTR_ERR(i2s->op_clk); |
| |
| 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); |
| int lrp_shift, sdf_shift, sdf_mask, lrp_rlow; |
| u32 tmp = 0; |
| |
| if (i2s->quirks & QUIRK_SUPPORTS_TDM) { |
| lrp_shift = EXYNOS5420_MOD_LRP_SHIFT; |
| sdf_shift = EXYNOS5420_MOD_SDF_SHIFT; |
| } else { |
| lrp_shift = MOD_LRP_SHIFT; |
| sdf_shift = MOD_SDF_SHIFT; |
| } |
| |
| 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_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; |
| } |
| |
| /* |
| * 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)) { |
| 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, 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); |
| |
| samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &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; |
| |
| 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; |
| } |
| |
| set_bfs(i2s, bfs); |
| set_rfs(i2s, rfs); |
| |
| /* Don't bother with PSR in Slave mode */ |
| if (is_slave(i2s)) |
| return 0; |
| |
| 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 */ |
| samsung_asoc_init_dma_data(dai, &other->sec_dai->dma_playback, |
| NULL); |
| 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); |
| |
| samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture); |
| |
| 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->rclk_srcrate = 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, |
| }; |
| |
| static const struct snd_soc_component_driver samsung_i2s_component = { |
| .name = "samsung-i2s", |
| }; |
| |
| #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; |
| int ret; |
| |
| 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 = 1; |
| 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; |
| dev_set_drvdata(&i2s->pdev->dev, i2s); |
| } else { /* Create a new platform_device for Secondary */ |
| i2s->pdev = platform_device_alloc("samsung-i2s-sec", -1); |
| if (!i2s->pdev) |
| return NULL; |
| |
| i2s->pdev->dev.parent = &pdev->dev; |
| |
| platform_set_drvdata(i2s->pdev, i2s); |
| ret = platform_device_add(i2s->pdev); |
| if (ret < 0) |
| return NULL; |
| } |
| |
| return i2s; |
| } |
| |
| static const struct of_device_id exynos_i2s_match[]; |
| |
| static inline const struct samsung_i2s_dai_data *samsung_i2s_get_driver_data( |
| struct platform_device *pdev) |
| { |
| #ifdef CONFIG_OF |
| if (pdev->dev.of_node) { |
| const struct of_device_id *match; |
| match = of_match_node(exynos_i2s_match, pdev->dev.of_node); |
| return match->data; |
| } else |
| #endif |
| return (struct samsung_i2s_dai_data *) |
| platform_get_device_id(pdev)->driver_data; |
| } |
| |
| #ifdef CONFIG_PM_RUNTIME |
| static int i2s_runtime_suspend(struct device *dev) |
| { |
| struct i2s_dai *i2s = dev_get_drvdata(dev); |
| |
| clk_disable_unprepare(i2s->clk); |
| |
| return 0; |
| } |
| |
| static int i2s_runtime_resume(struct device *dev) |
| { |
| struct i2s_dai *i2s = dev_get_drvdata(dev); |
| |
| clk_prepare_enable(i2s->clk); |
| |
| return 0; |
| } |
| #endif /* CONFIG_PM_RUNTIME */ |
| |
| 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; |
| const struct samsung_i2s_dai_data *i2s_dai_data; |
| int ret = 0; |
| |
| /* Call during Seconday interface registration */ |
| i2s_dai_data = samsung_i2s_get_driver_data(pdev); |
| |
| if (i2s_dai_data->dai_type == TYPE_SEC) { |
| sec_dai = dev_get_drvdata(&pdev->dev); |
| if (!sec_dai) { |
| dev_err(&pdev->dev, "Unable to get drvdata\n"); |
| return -EFAULT; |
| } |
| devm_snd_soc_register_component(&sec_dai->pdev->dev, |
| &samsung_i2s_component, |
| &sec_dai->i2s_dai_drv, 1); |
| samsung_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 { |
| quirks = i2s_dai_data->quirks; |
| 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 s3c_dma_client *)&pri_dai->dma_playback; |
| pri_dai->dma_playback.ch_name = "tx"; |
| pri_dai->dma_capture.client = |
| (struct s3c_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 s3c_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 (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { |
| dev_err(&pdev->dev, "Unable to configure gpio\n"); |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| devm_snd_soc_register_component(&pri_dai->pdev->dev, |
| &samsung_i2s_component, |
| &pri_dai->i2s_dai_drv, 1); |
| |
| pm_runtime_enable(&pdev->dev); |
| |
| samsung_asoc_dma_platform_register(&pdev->dev); |
| |
| return 0; |
| err: |
| if (res) |
| 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; |
| |
| i2s = dev_get_drvdata(&pdev->dev); |
| other = i2s->pri_dai ? : i2s->sec_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; |
| |
| return 0; |
| } |
| |
| static const struct samsung_i2s_dai_data i2sv3_dai_type = { |
| .dai_type = TYPE_PRI, |
| .quirks = QUIRK_NO_MUXPSR, |
| }; |
| |
| static const struct samsung_i2s_dai_data i2sv5_dai_type = { |
| .dai_type = TYPE_PRI, |
| .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR, |
| }; |
| |
| static const struct samsung_i2s_dai_data i2sv6_dai_type = { |
| .dai_type = TYPE_PRI, |
| .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR | |
| QUIRK_SUPPORTS_TDM, |
| }; |
| |
| static const struct samsung_i2s_dai_data samsung_dai_type_pri = { |
| .dai_type = TYPE_PRI, |
| }; |
| |
| static const struct samsung_i2s_dai_data samsung_dai_type_sec = { |
| .dai_type = TYPE_SEC, |
| }; |
| |
| static struct platform_device_id samsung_i2s_driver_ids[] = { |
| { |
| .name = "samsung-i2s", |
| .driver_data = (kernel_ulong_t)&samsung_dai_type_pri, |
| }, { |
| .name = "samsung-i2s-sec", |
| .driver_data = (kernel_ulong_t)&samsung_dai_type_sec, |
| }, |
| {}, |
| }; |
| 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, |
| }, |
| {}, |
| }; |
| 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) |
| }; |
| |
| 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), |
| .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"); |