diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/soc/samsung/i2s.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/soc/samsung/i2s.c | 1158 |
1 files changed, 0 insertions, 1158 deletions
diff --git a/ANDROID_3.4.5/sound/soc/samsung/i2s.c b/ANDROID_3.4.5/sound/soc/samsung/i2s.c deleted file mode 100644 index 6ac7b828..00000000 --- a/ANDROID_3.4.5/sound/soc/samsung/i2s.c +++ /dev/null @@ -1,1158 +0,0 @@ -/* 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/pm_runtime.h> - -#include <sound/soc.h> -#include <sound/pcm_params.h> - -#include <plat/audio.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) - -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; - struct s3c_dma_params idma_playback; - 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 + 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(i2s->op_clk); - clk_put(i2s->op_clk); - } else { - i2s->rclk_srcrate = - clk_get_rate(i2s->op_clk); - 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: - 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; - - 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_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(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 __devinit -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, - pdev->name, pdev->id + SAMSUNG_I2S_SECOFF, - 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; -} - -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 err; - } - - 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 err; - } - 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->idma_playback.dma_addr = i2s_cfg->idma_addr; - 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 err; - } - - snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv); - - pm_runtime_enable(&pdev->dev); - - return 0; -err: - 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; - 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; - - snd_soc_unregister_dai(&pdev->dev); - - return 0; -} - -static struct platform_driver samsung_i2s_driver = { - .probe = samsung_i2s_probe, - .remove = __devexit_p(samsung_i2s_remove), - .driver = { - .name = "samsung-i2s", - .owner = THIS_MODULE, - }, -}; - -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"); |