[alsa-devel] [PATCH 10/24] ASoC: Samsung: Add common I2S driver

From: Jassi Brar jassi.brar@samsung.com

The I2S controllers since S3C64XX are incremental revisions, with a new feature added to the last one. The programming i/f doesn't conflict between these revisions, so it is possible to have one common driver that could manage various versions of I2S (v3, 4 & 5)

Signed-off-by: Jassi Brar jassi.brar@samsung.com --- arch/arm/plat-samsung/include/plat/audio.h | 24 + sound/soc/s3c24xx/Kconfig | 3 + sound/soc/s3c24xx/Makefile | 2 + sound/soc/s3c24xx/i2s.c | 1256 ++++++++++++++++++++++++++++ sound/soc/s3c24xx/i2s.h | 29 + 5 files changed, 1314 insertions(+), 0 deletions(-) create mode 100644 sound/soc/s3c24xx/i2s.c create mode 100644 sound/soc/s3c24xx/i2s.h

diff --git a/arch/arm/plat-samsung/include/plat/audio.h b/arch/arm/plat-samsung/include/plat/audio.h index e32f9ed..b72ad03 100644 --- a/arch/arm/plat-samsung/include/plat/audio.h +++ b/arch/arm/plat-samsung/include/plat/audio.h @@ -16,10 +16,34 @@ #define S3C64XX_AC97_GPE 1 extern void s3c64xx_ac97_setup_gpio(int);

+struct samsung_i2s { +/* If the Primary DAI has 5.1 Channels */ +#define QUIRK_PRI_6CHAN (1 << 0) +/* If the I2S block has a Stereo Overlay Channel */ +#define QUIRK_SEC_DAI (1 << 1) +/* + * If the I2S block has no internal prescalar or MUX (I2SMOD[10] bit) + * The Machine driver must provide suitably set clock to the I2S block. + */ +#define QUIRK_NO_MUXPSR (1 << 2) +#define QUIRK_NEED_RSTCLR (1 << 3) + /* Quirks of the I2S controller */ + u32 quirks; + + /* + * Array of clock names that can be used to generate I2S signals. + * Also corresponds to clocks of I2SMOD[10] + */ + const char **src_clk; +}; + /** * struct s3c_audio_pdata - common platform data for audio device drivers * @cfg_gpio: Callback function to setup mux'ed pins in I2S/PCM/AC97 mode */ struct s3c_audio_pdata { int (*cfg_gpio)(struct platform_device *); + union { + struct samsung_i2s i2s; + } type; }; diff --git a/sound/soc/s3c24xx/Kconfig b/sound/soc/s3c24xx/Kconfig index 6efdf65..20fe288 100644 --- a/sound/soc/s3c24xx/Kconfig +++ b/sound/soc/s3c24xx/Kconfig @@ -40,6 +40,9 @@ config SND_S5P_SOC_SPDIF tristate select SND_SOC_SPDIF

+config SND_SAMSUNG_I2S + tristate + config SND_S3C24XX_SOC_NEO1973_WM8753 tristate "SoC I2S Audio support for NEO1973 - WM8753" depends on SND_S3C24XX_SOC && MACH_NEO1973_GTA01 diff --git a/sound/soc/s3c24xx/Makefile b/sound/soc/s3c24xx/Makefile index 93de2a0..1d6fc07 100644 --- a/sound/soc/s3c24xx/Makefile +++ b/sound/soc/s3c24xx/Makefile @@ -8,6 +8,7 @@ snd-soc-s3c64xx-i2s-v4-objs := s3c64xx-i2s-v4.o snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o snd-soc-samsung-spdif-objs := spdif.o snd-soc-pcm-objs := pcm.o +snd-soc-i2s-objs := i2s.o

obj-$(CONFIG_SND_S3C24XX_SOC) += snd-soc-s3c24xx.o obj-$(CONFIG_SND_S3C24XX_SOC_I2S) += snd-soc-s3c24xx-i2s.o @@ -18,6 +19,7 @@ obj-$(CONFIG_SND_S3C64XX_SOC_I2S_V4) += snd-soc-s3c64xx-i2s-v4.o obj-$(CONFIG_SND_S3C_I2SV2_SOC) += snd-soc-s3c-i2s-v2.o obj-$(CONFIG_SND_S5P_SOC_SPDIF) += snd-soc-samsung-spdif.o obj-$(CONFIG_SND_S3C_SOC_PCM) += snd-soc-pcm.o +obj-$(CONFIG_SND_SAMSUNG_I2S) += snd-soc-i2s.o

# S3C24XX Machine Support snd-soc-jive-wm8750-objs := jive_wm8750.o diff --git a/sound/soc/s3c24xx/i2s.c b/sound/soc/s3c24xx/i2s.c new file mode 100644 index 0000000..7e6ddfa --- /dev/null +++ b/sound/soc/s3c24xx/i2s.c @@ -0,0 +1,1256 @@ +/* sound/soc/s3c24xx/i2s.c + * + * ALSA SoC Audio Layer - Samsung I2S Controller driver + * + * Copyright (c) 2010 Samsung Electronics Co. Ltd. + * Jaswinder Singh jassi.brar@samsung.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 <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include <plat/audio.h> + +#include "dma.h" +#include "i2s.h" + +#define I2SCON 0x0 +#define I2SMOD 0x4 +#define I2SFIC 0x8 +#define I2SPSR 0xc +#define I2STXD 0x10 +#define I2SRXD 0x14 +#define I2SFICS 0x18 +#define I2STXDS 0x1c + +#define CON_RSTCLR (1 << 31) +#define CON_FRXOFSTATUS (1 << 26) +#define CON_FRXORINTEN (1 << 25) +#define CON_FTXSURSTAT (1 << 24) +#define CON_FTXSURINTEN (1 << 23) +#define CON_TXSDMA_PAUSE (1 << 20) +#define CON_TXSDMA_ACTIVE (1 << 18) + +#define CON_FTXURSTATUS (1 << 17) +#define CON_FTXURINTEN (1 << 16) +#define CON_TXFIFO2_EMPTY (1 << 15) +#define CON_TXFIFO1_EMPTY (1 << 14) +#define CON_TXFIFO2_FULL (1 << 13) +#define CON_TXFIFO1_FULL (1 << 12) + +#define CON_LRINDEX (1 << 11) +#define CON_TXFIFO_EMPTY (1 << 10) +#define CON_RXFIFO_EMPTY (1 << 9) +#define CON_TXFIFO_FULL (1 << 8) +#define CON_RXFIFO_FULL (1 << 7) +#define CON_TXDMA_PAUSE (1 << 6) +#define CON_RXDMA_PAUSE (1 << 5) +#define CON_TXCH_PAUSE (1 << 4) +#define CON_RXCH_PAUSE (1 << 3) +#define CON_TXDMA_ACTIVE (1 << 2) +#define CON_RXDMA_ACTIVE (1 << 1) +#define CON_ACTIVE (1 << 0) + +#define MOD_OPCLK_CDCLK_OUT (0 << 30) +#define MOD_OPCLK_CDCLK_IN (1 << 30) +#define MOD_OPCLK_BCLK_OUT (2 << 30) +#define MOD_OPCLK_PCLK (3 << 30) +#define MOD_OPCLK_MASK (3 << 30) +#define MOD_TXS_IDMA (1 << 28) /* Sec_TXFIFO use I-DMA */ + +#define MOD_BLCS_SHIFT 26 +#define MOD_BLCS_16BIT (0 << MOD_BLCS_SHIFT) +#define MOD_BLCS_8BIT (1 << MOD_BLCS_SHIFT) +#define MOD_BLCS_24BIT (2 << MOD_BLCS_SHIFT) +#define MOD_BLCS_MASK (3 << MOD_BLCS_SHIFT) +#define MOD_BLCP_SHIFT 24 +#define MOD_BLCP_16BIT (0 << MOD_BLCP_SHIFT) +#define MOD_BLCP_8BIT (1 << MOD_BLCP_SHIFT) +#define MOD_BLCP_24BIT (2 << MOD_BLCP_SHIFT) +#define MOD_BLCP_MASK (3 << MOD_BLCP_SHIFT) + +#define MOD_C2DD_HHALF (1 << 21) /* Discard Higher-half */ +#define MOD_C2DD_LHALF (1 << 20) /* Discard Lower-half */ +#define MOD_C1DD_HHALF (1 << 19) +#define MOD_C1DD_LHALF (1 << 18) +#define MOD_DC2_EN (1 << 17) +#define MOD_DC1_EN (1 << 16) +#define MOD_BLC_16BIT (0 << 13) +#define MOD_BLC_8BIT (1 << 13) +#define MOD_BLC_24BIT (2 << 13) +#define MOD_BLC_MASK (3 << 13) + +#define MOD_IMS_SYSMUX (1 << 10) +#define MOD_SLAVE (1 << 11) +#define MOD_TXONLY (0 << 8) +#define MOD_RXONLY (1 << 8) +#define MOD_TXRX (2 << 8) +#define MOD_MASK (3 << 8) +#define MOD_LR_LLOW (0 << 7) +#define MOD_LR_RLOW (1 << 7) +#define MOD_SDF_IIS (0 << 5) +#define MOD_SDF_MSB (1 << 5) +#define MOD_SDF_LSB (2 << 5) +#define MOD_SDF_MASK (3 << 5) +#define MOD_RCLK_256FS (0 << 3) +#define MOD_RCLK_512FS (1 << 3) +#define MOD_RCLK_384FS (2 << 3) +#define MOD_RCLK_768FS (3 << 3) +#define MOD_RCLK_MASK (3 << 3) +#define MOD_BCLK_32FS (0 << 1) +#define MOD_BCLK_48FS (1 << 1) +#define MOD_BCLK_16FS (2 << 1) +#define MOD_BCLK_24FS (3 << 1) +#define MOD_BCLK_MASK (3 << 1) +#define MOD_8BIT (1 << 0) + +#define MOD_CDCLKCON (1 << 12) + +#define PSR_PSREN (1 << 15) + +#define FIC_TX2COUNT(x) (((x) >> 24) & 0xf) +#define FIC_TX1COUNT(x) (((x) >> 16) & 0xf) + +#define FIC_TXFLUSH (1 << 15) +#define FIC_RXFLUSH (1 << 7) +#define FIC_TXCOUNT(x) (((x) >> 8) & 0xf) +#define FIC_RXCOUNT(x) (((x) >> 0) & 0xf) +#define FICS_TXCOUNT(x) (((x) >> 8) & 0x7f) + +#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) + +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; + /* Array of clock names for op_clk */ + const char **src_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; + u32 quirks; + u32 suspend_i2smod; + u32 suspend_i2scon; + u32 suspend_i2spsr; +}; + +/* 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 + I2SMOD); + + 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 + I2SMOD) & 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(i2s->op_clk); + clk_put(i2s->op_clk); + } else { + return 0; + } + } + + i2s->op_clk = clk_get(&i2s->pdev->dev, + i2s->src_clk[clk_id]); + clk_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: + 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; + + 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 (capture) + i2s_fifo(i2s, FIC_RXFLUSH); + else + i2s_fifo(i2s, FIC_TXFLUSH); + + 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); + else + i2s_txctrl(i2s, 0); + + 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_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); + +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(i2s->clk); + clk_put(i2s->clk); + + iounmap(i2s->addr); + } + + i2s->clk = NULL; + + return 0; +} + +static 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 __devinit +struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec) +{ + struct i2s_dai *i2s; + + i2s = kzalloc(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 = 2; + 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, + pdev->name, pdev->id + SAMSUNG_I2S_SECOFF, + NULL, 0, NULL, 0); + if (IS_ERR(i2s->pdev)) { + kfree(i2s); + return NULL; + } + } + + /* Pre-assign snd_soc_dai_set_drvdata */ + dev_set_drvdata(&i2s->pdev->dev, i2s); + + return i2s; +} + +static __devinit int samsung_i2s_probe(struct platform_device *pdev) +{ + u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan; + struct i2s_dai *pri_dai, *sec_dai = NULL; + struct s3c_audio_pdata *i2s_pdata; + struct samsung_i2s *i2s_cfg; + struct resource *res; + u32 regs_base, quirks; + int ret = 0; + + /* Call during Seconday interface registration */ + if (pdev->id >= SAMSUNG_I2S_SECOFF) { + sec_dai = dev_get_drvdata(&pdev->dev); + snd_soc_register_dai(&sec_dai->pdev->dev, + &sec_dai->i2s_dai_drv); + return 0; + } + + i2s_pdata = pdev->dev.platform_data; + if (i2s_pdata == NULL) { + dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n"); + return -EINVAL; + } + + res = platform_get_resource(pdev, IORESOURCE_DMA, 0); + if (!res) { + dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n"); + return -ENXIO; + } + dma_pl_chan = 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; + } + dma_cp_chan = res->start; + + res = platform_get_resource(pdev, IORESOURCE_DMA, 2); + if (res) + dma_pl_sec_chan = res->start; + else + dma_pl_sec_chan = 0; + + 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; + + i2s_cfg = &i2s_pdata->type.i2s; + quirks = i2s_cfg->quirks; + + pri_dai = i2s_alloc_dai(pdev, false); + if (!pri_dai) { + dev_err(&pdev->dev, "Unable to alloc I2S_pri\n"); + ret = -ENOMEM; + goto err1; + } + + 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_capture.client = + (struct s3c2410_dma_client *)&pri_dai->dma_capture; + pri_dai->dma_playback.channel = dma_pl_chan; + pri_dai->dma_capture.channel = dma_cp_chan; + pri_dai->src_clk = i2s_cfg->src_clk; + 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 err2; + } + sec_dai->dma_playback.dma_addr = regs_base + I2STXDS; + sec_dai->dma_playback.client = + (struct s3c2410_dma_client *)&sec_dai->dma_playback; + /* Use iDMA always if SysDMA not provided */ + sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1; + sec_dai->src_clk = i2s_cfg->src_clk; + sec_dai->dma_playback.dma_size = 4; + sec_dai->base = regs_base; + sec_dai->quirks = quirks; + sec_dai->pri_dai = pri_dai; + pri_dai->sec_dai = sec_dai; + } + + if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { + dev_err(&pdev->dev, "Unable to configure gpio\n"); + ret = -EINVAL; + goto err3; + } + + snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv); + + return 0; +err3: + kfree(sec_dai); +err2: + kfree(pri_dai); +err1: + release_mem_region(regs_base, resource_size(res)); + + return ret; +} + +static __devexit int samsung_i2s_remove(struct platform_device *pdev) +{ + struct i2s_dai *i2s, *other; + + i2s = dev_get_drvdata(&pdev->dev); + other = i2s->pri_dai ? : i2s->sec_dai; + + if (other) { + other->pri_dai = NULL; + other->sec_dai = NULL; + } else { + struct resource *res; + 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; + + kfree(i2s); + + snd_soc_unregister_dai(&pdev->dev); + + return 0; +} + +static struct platform_driver samsung_i2s_driver = { + .probe = samsung_i2s_probe, + .remove = samsung_i2s_remove, + .driver = { + .name = "samsung-i2s", + .owner = THIS_MODULE, + }, +}; + +static int __init samsung_i2s_init(void) +{ + return platform_driver_register(&samsung_i2s_driver); +} +module_init(samsung_i2s_init); + +static void __exit samsung_i2s_exit(void) +{ + platform_driver_unregister(&samsung_i2s_driver); +} +module_exit(samsung_i2s_exit); + +/* Module information */ +MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com"); +MODULE_DESCRIPTION("Samsung I2S Interface"); +MODULE_ALIAS("platform:samsung-i2s"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/s3c24xx/i2s.h b/sound/soc/s3c24xx/i2s.h new file mode 100644 index 0000000..d3180b3 --- /dev/null +++ b/sound/soc/s3c24xx/i2s.h @@ -0,0 +1,29 @@ +/* sound/soc/s3c24xx/i2s.h + * + * ALSA SoC Audio Layer - Samsung I2S Controller driver + * + * Copyright (c) 2010 Samsung Electronics Co. Ltd. + * Jaswinder Singh jassi.brar@samsung.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. + */ + +#ifndef __SND_SOC_SAMSUNG_I2S_H +#define __SND_SOC_SAMSUNG_I2S_H + +/* + * Maximum number of I2S blocks that any SoC can have. + * The secondary interface of a CPU dai(if there exists any), + * is indexed at [cpu-dai's ID + SAMSUNG_I2S_SECOFF] + */ +#define SAMSUNG_I2S_SECOFF 4 + +#define SAMSUNG_I2S_DIV_BCLK 1 + +#define SAMSUNG_I2S_RCLKSRC_0 0 +#define SAMSUNG_I2S_RCLKSRC_1 1 +#define SAMSUNG_I2S_CDCLK 2 + +#endif /* __SND_SOC_SAMSUNG_I2S_H */