| /* |
| * ALSA SoC McASP Audio Layer for TI DAVINCI processor |
| * |
| * Multi-channel Audio Serial Port Driver |
| * |
| * Author: Nirmal Pandey <n-pandey@ti.com>, |
| * Suresh Rajashekara <suresh.r@ti.com> |
| * Steve Chen <schen@.mvista.com> |
| * |
| * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com> |
| * Copyright: (C) 2009 Texas Instruments, India |
| * |
| * 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/init.h> |
| #include <linux/module.h> |
| #include <linux/device.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/clk.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/of.h> |
| #include <linux/of_platform.h> |
| #include <linux/of_device.h> |
| #include <linux/platform_data/davinci_asp.h> |
| #include <linux/math64.h> |
| |
| #include <sound/asoundef.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/initval.h> |
| #include <sound/soc.h> |
| #include <sound/dmaengine_pcm.h> |
| #include <sound/omap-pcm.h> |
| |
| #include "edma-pcm.h" |
| #include "davinci-mcasp.h" |
| |
| #define MCASP_MAX_AFIFO_DEPTH 64 |
| |
| #ifdef CONFIG_PM |
| static u32 context_regs[] = { |
| DAVINCI_MCASP_TXFMCTL_REG, |
| DAVINCI_MCASP_RXFMCTL_REG, |
| DAVINCI_MCASP_TXFMT_REG, |
| DAVINCI_MCASP_RXFMT_REG, |
| DAVINCI_MCASP_ACLKXCTL_REG, |
| DAVINCI_MCASP_ACLKRCTL_REG, |
| DAVINCI_MCASP_AHCLKXCTL_REG, |
| DAVINCI_MCASP_AHCLKRCTL_REG, |
| DAVINCI_MCASP_PDIR_REG, |
| DAVINCI_MCASP_RXMASK_REG, |
| DAVINCI_MCASP_TXMASK_REG, |
| DAVINCI_MCASP_RXTDM_REG, |
| DAVINCI_MCASP_TXTDM_REG, |
| }; |
| |
| struct davinci_mcasp_context { |
| u32 config_regs[ARRAY_SIZE(context_regs)]; |
| u32 afifo_regs[2]; /* for read/write fifo control registers */ |
| u32 *xrsr_regs; /* for serializer configuration */ |
| bool pm_state; |
| }; |
| #endif |
| |
| struct davinci_mcasp_ruledata { |
| struct davinci_mcasp *mcasp; |
| int serializers; |
| }; |
| |
| struct davinci_mcasp { |
| struct snd_dmaengine_dai_dma_data dma_data[2]; |
| void __iomem *base; |
| u32 fifo_base; |
| struct device *dev; |
| struct snd_pcm_substream *substreams[2]; |
| unsigned int dai_fmt; |
| |
| /* McASP specific data */ |
| int tdm_slots; |
| u32 tdm_mask[2]; |
| int slot_width; |
| u8 op_mode; |
| u8 num_serializer; |
| u8 *serial_dir; |
| u8 version; |
| u8 bclk_div; |
| int streams; |
| u32 irq_request[2]; |
| int dma_request[2]; |
| |
| int sysclk_freq; |
| bool bclk_master; |
| |
| /* McASP FIFO related */ |
| u8 txnumevt; |
| u8 rxnumevt; |
| |
| bool dat_port; |
| |
| /* Used for comstraint setting on the second stream */ |
| u32 channels; |
| |
| #ifdef CONFIG_PM_SLEEP |
| struct davinci_mcasp_context context; |
| #endif |
| |
| struct davinci_mcasp_ruledata ruledata[2]; |
| struct snd_pcm_hw_constraint_list chconstr[2]; |
| }; |
| |
| static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset, |
| u32 val) |
| { |
| void __iomem *reg = mcasp->base + offset; |
| __raw_writel(__raw_readl(reg) | val, reg); |
| } |
| |
| static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset, |
| u32 val) |
| { |
| void __iomem *reg = mcasp->base + offset; |
| __raw_writel((__raw_readl(reg) & ~(val)), reg); |
| } |
| |
| static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset, |
| u32 val, u32 mask) |
| { |
| void __iomem *reg = mcasp->base + offset; |
| __raw_writel((__raw_readl(reg) & ~mask) | val, reg); |
| } |
| |
| static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset, |
| u32 val) |
| { |
| __raw_writel(val, mcasp->base + offset); |
| } |
| |
| static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset) |
| { |
| return (u32)__raw_readl(mcasp->base + offset); |
| } |
| |
| static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val) |
| { |
| int i = 0; |
| |
| mcasp_set_bits(mcasp, ctl_reg, val); |
| |
| /* programming GBLCTL needs to read back from GBLCTL and verfiy */ |
| /* loop count is to avoid the lock-up */ |
| for (i = 0; i < 1000; i++) { |
| if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val) |
| break; |
| } |
| |
| if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val)) |
| printk(KERN_ERR "GBLCTL write error\n"); |
| } |
| |
| static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp) |
| { |
| u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG); |
| u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG); |
| |
| return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE; |
| } |
| |
| static void mcasp_start_rx(struct davinci_mcasp *mcasp) |
| { |
| if (mcasp->rxnumevt) { /* enable FIFO */ |
| u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; |
| |
| mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); |
| mcasp_set_bits(mcasp, reg, FIFO_ENABLE); |
| } |
| |
| /* Start clocks */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST); |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST); |
| /* |
| * When ASYNC == 0 the transmit and receive sections operate |
| * synchronously from the transmit clock and frame sync. We need to make |
| * sure that the TX signlas are enabled when starting reception. |
| */ |
| if (mcasp_is_synchronous(mcasp)) { |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST); |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST); |
| } |
| |
| /* Activate serializer(s) */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR); |
| /* Release RX state machine */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST); |
| /* Release Frame Sync generator */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST); |
| if (mcasp_is_synchronous(mcasp)) |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST); |
| |
| /* enable receive IRQs */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG, |
| mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]); |
| } |
| |
| static void mcasp_start_tx(struct davinci_mcasp *mcasp) |
| { |
| u32 cnt; |
| |
| if (mcasp->txnumevt) { /* enable FIFO */ |
| u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; |
| |
| mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); |
| mcasp_set_bits(mcasp, reg, FIFO_ENABLE); |
| } |
| |
| /* Start clocks */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST); |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST); |
| /* Activate serializer(s) */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR); |
| |
| /* wait for XDATA to be cleared */ |
| cnt = 0; |
| while ((mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG) & XRDATA) && |
| (cnt < 100000)) |
| cnt++; |
| |
| /* Release TX state machine */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST); |
| /* Release Frame Sync generator */ |
| mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST); |
| |
| /* enable transmit IRQs */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG, |
| mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]); |
| } |
| |
| static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream) |
| { |
| mcasp->streams++; |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| mcasp_start_tx(mcasp); |
| else |
| mcasp_start_rx(mcasp); |
| } |
| |
| static void mcasp_stop_rx(struct davinci_mcasp *mcasp) |
| { |
| /* disable IRQ sources */ |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG, |
| mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]); |
| |
| /* |
| * In synchronous mode stop the TX clocks if no other stream is |
| * running |
| */ |
| if (mcasp_is_synchronous(mcasp) && !mcasp->streams) |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0); |
| |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0); |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF); |
| |
| if (mcasp->rxnumevt) { /* disable FIFO */ |
| u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; |
| |
| mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); |
| } |
| } |
| |
| static void mcasp_stop_tx(struct davinci_mcasp *mcasp) |
| { |
| u32 val = 0; |
| |
| /* disable IRQ sources */ |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG, |
| mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]); |
| |
| /* |
| * In synchronous mode keep TX clocks running if the capture stream is |
| * still running. |
| */ |
| if (mcasp_is_synchronous(mcasp) && mcasp->streams) |
| val = TXHCLKRST | TXCLKRST | TXFSRST; |
| |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val); |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); |
| |
| if (mcasp->txnumevt) { /* disable FIFO */ |
| u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; |
| |
| mcasp_clr_bits(mcasp, reg, FIFO_ENABLE); |
| } |
| } |
| |
| static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream) |
| { |
| mcasp->streams--; |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| mcasp_stop_tx(mcasp); |
| else |
| mcasp_stop_rx(mcasp); |
| } |
| |
| static irqreturn_t davinci_mcasp_tx_irq_handler(int irq, void *data) |
| { |
| struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data; |
| struct snd_pcm_substream *substream; |
| u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]; |
| u32 handled_mask = 0; |
| u32 stat; |
| |
| stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG); |
| if (stat & XUNDRN & irq_mask) { |
| dev_warn(mcasp->dev, "Transmit buffer underflow\n"); |
| handled_mask |= XUNDRN; |
| |
| substream = mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK]; |
| if (substream) { |
| snd_pcm_stream_lock_irq(substream); |
| if (snd_pcm_running(substream)) |
| snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
| snd_pcm_stream_unlock_irq(substream); |
| } |
| } |
| |
| if (!handled_mask) |
| dev_warn(mcasp->dev, "unhandled tx event. txstat: 0x%08x\n", |
| stat); |
| |
| if (stat & XRERR) |
| handled_mask |= XRERR; |
| |
| /* Ack the handled event only */ |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, handled_mask); |
| |
| return IRQ_RETVAL(handled_mask); |
| } |
| |
| static irqreturn_t davinci_mcasp_rx_irq_handler(int irq, void *data) |
| { |
| struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data; |
| struct snd_pcm_substream *substream; |
| u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]; |
| u32 handled_mask = 0; |
| u32 stat; |
| |
| stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG); |
| if (stat & ROVRN & irq_mask) { |
| dev_warn(mcasp->dev, "Receive buffer overflow\n"); |
| handled_mask |= ROVRN; |
| |
| substream = mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE]; |
| if (substream) { |
| snd_pcm_stream_lock_irq(substream); |
| if (snd_pcm_running(substream)) |
| snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
| snd_pcm_stream_unlock_irq(substream); |
| } |
| } |
| |
| if (!handled_mask) |
| dev_warn(mcasp->dev, "unhandled rx event. rxstat: 0x%08x\n", |
| stat); |
| |
| if (stat & XRERR) |
| handled_mask |= XRERR; |
| |
| /* Ack the handled event only */ |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, handled_mask); |
| |
| return IRQ_RETVAL(handled_mask); |
| } |
| |
| static irqreturn_t davinci_mcasp_common_irq_handler(int irq, void *data) |
| { |
| struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data; |
| irqreturn_t ret = IRQ_NONE; |
| |
| if (mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK]) |
| ret = davinci_mcasp_tx_irq_handler(irq, data); |
| |
| if (mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE]) |
| ret |= davinci_mcasp_rx_irq_handler(irq, data); |
| |
| return ret; |
| } |
| |
| static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai, |
| unsigned int fmt) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); |
| int ret = 0; |
| u32 data_delay; |
| bool fs_pol_rising; |
| bool inv_fs = false; |
| |
| if (!fmt) |
| return 0; |
| |
| pm_runtime_get_sync(mcasp->dev); |
| switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| case SND_SOC_DAIFMT_DSP_A: |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); |
| /* 1st data bit occur one ACLK cycle after the frame sync */ |
| data_delay = 1; |
| break; |
| case SND_SOC_DAIFMT_DSP_B: |
| case SND_SOC_DAIFMT_AC97: |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); |
| /* No delay after FS */ |
| data_delay = 0; |
| break; |
| case SND_SOC_DAIFMT_I2S: |
| /* configure a full-word SYNC pulse (LRCLK) */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); |
| /* 1st data bit occur one ACLK cycle after the frame sync */ |
| data_delay = 1; |
| /* FS need to be inverted */ |
| inv_fs = true; |
| break; |
| case SND_SOC_DAIFMT_LEFT_J: |
| /* configure a full-word SYNC pulse (LRCLK) */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR); |
| /* No delay after FS */ |
| data_delay = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay), |
| FSXDLY(3)); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay), |
| FSRDLY(3)); |
| |
| switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| case SND_SOC_DAIFMT_CBS_CFS: |
| /* codec is clock and frame slave */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); |
| |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); |
| |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR); |
| mcasp->bclk_master = 1; |
| break; |
| case SND_SOC_DAIFMT_CBS_CFM: |
| /* codec is clock slave and frame master */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); |
| |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); |
| |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR); |
| mcasp->bclk_master = 1; |
| break; |
| case SND_SOC_DAIFMT_CBM_CFS: |
| /* codec is clock master and frame slave */ |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); |
| |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); |
| |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR); |
| mcasp->bclk_master = 0; |
| break; |
| case SND_SOC_DAIFMT_CBM_CFM: |
| /* codec is clock and frame master */ |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE); |
| |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE); |
| |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, |
| ACLKX | AFSX | ACLKR | AHCLKR | AFSR); |
| mcasp->bclk_master = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| case SND_SOC_DAIFMT_IB_NF: |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); |
| fs_pol_rising = true; |
| break; |
| case SND_SOC_DAIFMT_NB_IF: |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); |
| fs_pol_rising = false; |
| break; |
| case SND_SOC_DAIFMT_IB_IF: |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); |
| fs_pol_rising = false; |
| break; |
| case SND_SOC_DAIFMT_NB_NF: |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL); |
| fs_pol_rising = true; |
| break; |
| default: |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (inv_fs) |
| fs_pol_rising = !fs_pol_rising; |
| |
| if (fs_pol_rising) { |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL); |
| } else { |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL); |
| } |
| |
| mcasp->dai_fmt = fmt; |
| out: |
| pm_runtime_put(mcasp->dev); |
| return ret; |
| } |
| |
| static int __davinci_mcasp_set_clkdiv(struct davinci_mcasp *mcasp, int div_id, |
| int div, bool explicit) |
| { |
| pm_runtime_get_sync(mcasp->dev); |
| switch (div_id) { |
| case MCASP_CLKDIV_AUXCLK: /* MCLK divider */ |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, |
| AHCLKXDIV(div - 1), AHCLKXDIV_MASK); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, |
| AHCLKRDIV(div - 1), AHCLKRDIV_MASK); |
| break; |
| |
| case MCASP_CLKDIV_BCLK: /* BCLK divider */ |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, |
| ACLKXDIV(div - 1), ACLKXDIV_MASK); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, |
| ACLKRDIV(div - 1), ACLKRDIV_MASK); |
| if (explicit) |
| mcasp->bclk_div = div; |
| break; |
| |
| case MCASP_CLKDIV_BCLK_FS_RATIO: |
| /* |
| * BCLK/LRCLK ratio descries how many bit-clock cycles |
| * fit into one frame. The clock ratio is given for a |
| * full period of data (for I2S format both left and |
| * right channels), so it has to be divided by number |
| * of tdm-slots (for I2S - divided by 2). |
| * Instead of storing this ratio, we calculate a new |
| * tdm_slot width by dividing the the ratio by the |
| * number of configured tdm slots. |
| */ |
| mcasp->slot_width = div / mcasp->tdm_slots; |
| if (div % mcasp->tdm_slots) |
| dev_warn(mcasp->dev, |
| "%s(): BCLK/LRCLK %d is not divisible by %d tdm slots", |
| __func__, div, mcasp->tdm_slots); |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| pm_runtime_put(mcasp->dev); |
| return 0; |
| } |
| |
| static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, |
| int div) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); |
| |
| return __davinci_mcasp_set_clkdiv(mcasp, div_id, div, 1); |
| } |
| |
| static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id, |
| unsigned int freq, int dir) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); |
| |
| pm_runtime_get_sync(mcasp->dev); |
| if (dir == SND_SOC_CLOCK_OUT) { |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX); |
| } else { |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX); |
| } |
| |
| mcasp->sysclk_freq = freq; |
| |
| pm_runtime_put(mcasp->dev); |
| return 0; |
| } |
| |
| /* All serializers must have equal number of channels */ |
| static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream, |
| int serializers) |
| { |
| struct snd_pcm_hw_constraint_list *cl = &mcasp->chconstr[stream]; |
| unsigned int *list = (unsigned int *) cl->list; |
| int slots = mcasp->tdm_slots; |
| int i, count = 0; |
| |
| if (mcasp->tdm_mask[stream]) |
| slots = hweight32(mcasp->tdm_mask[stream]); |
| |
| for (i = 1; i <= slots; i++) |
| list[count++] = i; |
| |
| for (i = 2; i <= serializers; i++) |
| list[count++] = i*slots; |
| |
| cl->count = count; |
| |
| return 0; |
| } |
| |
| static int davinci_mcasp_set_ch_constraints(struct davinci_mcasp *mcasp) |
| { |
| int rx_serializers = 0, tx_serializers = 0, ret, i; |
| |
| for (i = 0; i < mcasp->num_serializer; i++) |
| if (mcasp->serial_dir[i] == TX_MODE) |
| tx_serializers++; |
| else if (mcasp->serial_dir[i] == RX_MODE) |
| rx_serializers++; |
| |
| ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_PLAYBACK, |
| tx_serializers); |
| if (ret) |
| return ret; |
| |
| ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_CAPTURE, |
| rx_serializers); |
| |
| return ret; |
| } |
| |
| |
| static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai, |
| unsigned int tx_mask, |
| unsigned int rx_mask, |
| int slots, int slot_width) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); |
| |
| dev_dbg(mcasp->dev, |
| "%s() tx_mask 0x%08x rx_mask 0x%08x slots %d width %d\n", |
| __func__, tx_mask, rx_mask, slots, slot_width); |
| |
| if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) { |
| dev_err(mcasp->dev, |
| "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n", |
| tx_mask, rx_mask, slots); |
| return -EINVAL; |
| } |
| |
| if (slot_width && |
| (slot_width < 8 || slot_width > 32 || slot_width % 4 != 0)) { |
| dev_err(mcasp->dev, "%s: Unsupported slot_width %d\n", |
| __func__, slot_width); |
| return -EINVAL; |
| } |
| |
| mcasp->tdm_slots = slots; |
| mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask; |
| mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask; |
| mcasp->slot_width = slot_width; |
| |
| return davinci_mcasp_set_ch_constraints(mcasp); |
| } |
| |
| static int davinci_config_channel_size(struct davinci_mcasp *mcasp, |
| int sample_width) |
| { |
| u32 fmt; |
| u32 tx_rotate = (sample_width / 4) & 0x7; |
| u32 mask = (1ULL << sample_width) - 1; |
| u32 slot_width = sample_width; |
| |
| /* |
| * For captured data we should not rotate, inversion and masking is |
| * enoguh to get the data to the right position: |
| * Format data from bus after reverse (XRBUF) |
| * S16_LE: |LSB|MSB|xxx|xxx| |xxx|xxx|MSB|LSB| |
| * S24_3LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB| |
| * S24_LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB| |
| * S32_LE: |LSB|DAT|DAT|MSB| |MSB|DAT|DAT|LSB| |
| */ |
| u32 rx_rotate = 0; |
| |
| /* |
| * Setting the tdm slot width either with set_clkdiv() or |
| * set_tdm_slot() allows us to for example send 32 bits per |
| * channel to the codec, while only 16 of them carry audio |
| * payload. |
| */ |
| if (mcasp->slot_width) { |
| /* |
| * When we have more bclk then it is needed for the |
| * data, we need to use the rotation to move the |
| * received samples to have correct alignment. |
| */ |
| slot_width = mcasp->slot_width; |
| rx_rotate = (slot_width - sample_width) / 4; |
| } |
| |
| /* mapping of the XSSZ bit-field as described in the datasheet */ |
| fmt = (slot_width >> 1) - 1; |
| |
| if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) { |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt), |
| RXSSZ(0x0F)); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt), |
| TXSSZ(0x0F)); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate), |
| TXROT(7)); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate), |
| RXROT(7)); |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask); |
| } |
| |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask); |
| |
| return 0; |
| } |
| |
| static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream, |
| int period_words, int channels) |
| { |
| struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream]; |
| int i; |
| u8 tx_ser = 0; |
| u8 rx_ser = 0; |
| u8 slots = mcasp->tdm_slots; |
| u8 max_active_serializers = (channels + slots - 1) / slots; |
| int active_serializers, numevt; |
| u32 reg; |
| /* Default configuration */ |
| if (mcasp->version < MCASP_VERSION_3) |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT); |
| |
| /* All PINS as McASP */ |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000); |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS); |
| } else { |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF); |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS); |
| } |
| |
| for (i = 0; i < mcasp->num_serializer; i++) { |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), |
| mcasp->serial_dir[i]); |
| if (mcasp->serial_dir[i] == TX_MODE && |
| tx_ser < max_active_serializers) { |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i)); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), |
| DISMOD_LOW, DISMOD_MASK); |
| tx_ser++; |
| } else if (mcasp->serial_dir[i] == RX_MODE && |
| rx_ser < max_active_serializers) { |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i)); |
| rx_ser++; |
| } else { |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), |
| SRMOD_INACTIVE, SRMOD_MASK); |
| } |
| } |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| active_serializers = tx_ser; |
| numevt = mcasp->txnumevt; |
| reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; |
| } else { |
| active_serializers = rx_ser; |
| numevt = mcasp->rxnumevt; |
| reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; |
| } |
| |
| if (active_serializers < max_active_serializers) { |
| dev_warn(mcasp->dev, "stream has more channels (%d) than are " |
| "enabled in mcasp (%d)\n", channels, |
| active_serializers * slots); |
| return -EINVAL; |
| } |
| |
| /* AFIFO is not in use */ |
| if (!numevt) { |
| /* Configure the burst size for platform drivers */ |
| if (active_serializers > 1) { |
| /* |
| * If more than one serializers are in use we have one |
| * DMA request to provide data for all serializers. |
| * For example if three serializers are enabled the DMA |
| * need to transfer three words per DMA request. |
| */ |
| dma_data->maxburst = active_serializers; |
| } else { |
| dma_data->maxburst = 0; |
| } |
| return 0; |
| } |
| |
| if (period_words % active_serializers) { |
| dev_err(mcasp->dev, "Invalid combination of period words and " |
| "active serializers: %d, %d\n", period_words, |
| active_serializers); |
| return -EINVAL; |
| } |
| |
| /* |
| * Calculate the optimal AFIFO depth for platform side: |
| * The number of words for numevt need to be in steps of active |
| * serializers. |
| */ |
| numevt = (numevt / active_serializers) * active_serializers; |
| |
| while (period_words % numevt && numevt > 0) |
| numevt -= active_serializers; |
| if (numevt <= 0) |
| numevt = active_serializers; |
| |
| mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK); |
| mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK); |
| |
| /* Configure the burst size for platform drivers */ |
| if (numevt == 1) |
| numevt = 0; |
| dma_data->maxburst = numevt; |
| |
| return 0; |
| } |
| |
| static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream, |
| int channels) |
| { |
| int i, active_slots; |
| int total_slots; |
| int active_serializers; |
| u32 mask = 0; |
| u32 busel = 0; |
| |
| total_slots = mcasp->tdm_slots; |
| |
| /* |
| * If more than one serializer is needed, then use them with |
| * all the specified tdm_slots. Otherwise, one serializer can |
| * cope with the transaction using just as many slots as there |
| * are channels in the stream. |
| */ |
| if (mcasp->tdm_mask[stream]) { |
| active_slots = hweight32(mcasp->tdm_mask[stream]); |
| active_serializers = (channels + active_slots - 1) / |
| active_slots; |
| if (active_serializers == 1) { |
| active_slots = channels; |
| for (i = 0; i < total_slots; i++) { |
| if ((1 << i) & mcasp->tdm_mask[stream]) { |
| mask |= (1 << i); |
| if (--active_slots <= 0) |
| break; |
| } |
| } |
| } |
| } else { |
| active_serializers = (channels + total_slots - 1) / total_slots; |
| if (active_serializers == 1) |
| active_slots = channels; |
| else |
| active_slots = total_slots; |
| |
| for (i = 0; i < active_slots; i++) |
| mask |= (1 << i); |
| } |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC); |
| |
| if (!mcasp->dat_port) |
| busel = TXSEL; |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, |
| FSXMOD(total_slots), FSXMOD(0x1FF)); |
| } else if (stream == SNDRV_PCM_STREAM_CAPTURE) { |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask); |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD); |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, |
| FSRMOD(total_slots), FSRMOD(0x1FF)); |
| /* |
| * If McASP is set to be TX/RX synchronous and the playback is |
| * not running already we need to configure the TX slots in |
| * order to have correct FSX on the bus |
| */ |
| if (mcasp_is_synchronous(mcasp) && !mcasp->channels) |
| mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, |
| FSXMOD(total_slots), FSXMOD(0x1FF)); |
| } |
| |
| return 0; |
| } |
| |
| /* S/PDIF */ |
| static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp, |
| unsigned int rate) |
| { |
| u32 cs_value = 0; |
| u8 *cs_bytes = (u8*) &cs_value; |
| |
| /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0 |
| and LSB first */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15)); |
| |
| /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */ |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180)); |
| |
| /* Set the TX tdm : for all the slots */ |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF); |
| |
| /* Set the TX clock controls : div = 1 and internal */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC); |
| |
| mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS); |
| |
| /* Only 44100 and 48000 are valid, both have the same setting */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3)); |
| |
| /* Enable the DIT */ |
| mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN); |
| |
| /* Set S/PDIF channel status bits */ |
| cs_bytes[0] = IEC958_AES0_CON_NOT_COPYRIGHT; |
| cs_bytes[1] = IEC958_AES1_CON_PCM_CODER; |
| |
| switch (rate) { |
| case 22050: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_22050; |
| break; |
| case 24000: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_24000; |
| break; |
| case 32000: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_32000; |
| break; |
| case 44100: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_44100; |
| break; |
| case 48000: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_48000; |
| break; |
| case 88200: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_88200; |
| break; |
| case 96000: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_96000; |
| break; |
| case 176400: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_176400; |
| break; |
| case 192000: |
| cs_bytes[3] |= IEC958_AES3_CON_FS_192000; |
| break; |
| default: |
| printk(KERN_WARNING "unsupported sampling rate: %d\n", rate); |
| return -EINVAL; |
| } |
| |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, cs_value); |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, cs_value); |
| |
| return 0; |
| } |
| |
| static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp, |
| unsigned int bclk_freq, bool set) |
| { |
| int error_ppm; |
| unsigned int sysclk_freq = mcasp->sysclk_freq; |
| u32 reg = mcasp_get_reg(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG); |
| int div = sysclk_freq / bclk_freq; |
| int rem = sysclk_freq % bclk_freq; |
| int aux_div = 1; |
| |
| if (div > (ACLKXDIV_MASK + 1)) { |
| if (reg & AHCLKXE) { |
| aux_div = div / (ACLKXDIV_MASK + 1); |
| if (div % (ACLKXDIV_MASK + 1)) |
| aux_div++; |
| |
| sysclk_freq /= aux_div; |
| div = sysclk_freq / bclk_freq; |
| rem = sysclk_freq % bclk_freq; |
| } else if (set) { |
| dev_warn(mcasp->dev, "Too fast reference clock (%u)\n", |
| sysclk_freq); |
| } |
| } |
| |
| if (rem != 0) { |
| if (div == 0 || |
| ((sysclk_freq / div) - bclk_freq) > |
| (bclk_freq - (sysclk_freq / (div+1)))) { |
| div++; |
| rem = rem - bclk_freq; |
| } |
| } |
| error_ppm = (div*1000000 + (int)div64_long(1000000LL*rem, |
| (int)bclk_freq)) / div - 1000000; |
| |
| if (set) { |
| if (error_ppm) |
| dev_info(mcasp->dev, "Sample-rate is off by %d PPM\n", |
| error_ppm); |
| |
| __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_BCLK, div, 0); |
| if (reg & AHCLKXE) |
| __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_AUXCLK, |
| aux_div, 0); |
| } |
| |
| return error_ppm; |
| } |
| |
| static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); |
| int word_length; |
| int channels = params_channels(params); |
| int period_size = params_period_size(params); |
| int ret; |
| |
| ret = davinci_mcasp_set_dai_fmt(cpu_dai, mcasp->dai_fmt); |
| if (ret) |
| return ret; |
| |
| /* |
| * If mcasp is BCLK master, and a BCLK divider was not provided by |
| * the machine driver, we need to calculate the ratio. |
| */ |
| if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) { |
| int slots = mcasp->tdm_slots; |
| int rate = params_rate(params); |
| int sbits = params_width(params); |
| |
| if (mcasp->slot_width) |
| sbits = mcasp->slot_width; |
| |
| davinci_mcasp_calc_clk_div(mcasp, rate * sbits * slots, true); |
| } |
| |
| ret = mcasp_common_hw_param(mcasp, substream->stream, |
| period_size * channels, channels); |
| if (ret) |
| return ret; |
| |
| if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) |
| ret = mcasp_dit_hw_param(mcasp, params_rate(params)); |
| else |
| ret = mcasp_i2s_hw_param(mcasp, substream->stream, |
| channels); |
| |
| if (ret) |
| return ret; |
| |
| switch (params_format(params)) { |
| case SNDRV_PCM_FORMAT_U8: |
| case SNDRV_PCM_FORMAT_S8: |
| word_length = 8; |
| break; |
| |
| case SNDRV_PCM_FORMAT_U16_LE: |
| case SNDRV_PCM_FORMAT_S16_LE: |
| word_length = 16; |
| break; |
| |
| case SNDRV_PCM_FORMAT_U24_3LE: |
| case SNDRV_PCM_FORMAT_S24_3LE: |
| word_length = 24; |
| break; |
| |
| case SNDRV_PCM_FORMAT_U24_LE: |
| case SNDRV_PCM_FORMAT_S24_LE: |
| word_length = 24; |
| break; |
| |
| case SNDRV_PCM_FORMAT_U32_LE: |
| case SNDRV_PCM_FORMAT_S32_LE: |
| word_length = 32; |
| break; |
| |
| default: |
| printk(KERN_WARNING "davinci-mcasp: unsupported PCM format"); |
| return -EINVAL; |
| } |
| |
| davinci_config_channel_size(mcasp, word_length); |
| |
| if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) |
| mcasp->channels = channels; |
| |
| return 0; |
| } |
| |
| static int davinci_mcasp_trigger(struct snd_pcm_substream *substream, |
| int cmd, struct snd_soc_dai *cpu_dai) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); |
| int ret = 0; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| davinci_mcasp_start(mcasp, substream->stream); |
| break; |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| davinci_mcasp_stop(mcasp, substream->stream); |
| break; |
| |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static int davinci_mcasp_hw_rule_slot_width(struct snd_pcm_hw_params *params, |
| struct snd_pcm_hw_rule *rule) |
| { |
| struct davinci_mcasp_ruledata *rd = rule->private; |
| struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
| struct snd_mask nfmt; |
| int i, slot_width; |
| |
| snd_mask_none(&nfmt); |
| slot_width = rd->mcasp->slot_width; |
| |
| for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { |
| if (snd_mask_test(fmt, i)) { |
| if (snd_pcm_format_width(i) <= slot_width) { |
| snd_mask_set(&nfmt, i); |
| } |
| } |
| } |
| |
| return snd_mask_refine(fmt, &nfmt); |
| } |
| |
| static const unsigned int davinci_mcasp_dai_rates[] = { |
| 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, |
| 88200, 96000, 176400, 192000, |
| }; |
| |
| #define DAVINCI_MAX_RATE_ERROR_PPM 1000 |
| |
| static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params, |
| struct snd_pcm_hw_rule *rule) |
| { |
| struct davinci_mcasp_ruledata *rd = rule->private; |
| struct snd_interval *ri = |
| hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| int sbits = params_width(params); |
| int slots = rd->mcasp->tdm_slots; |
| struct snd_interval range; |
| int i; |
| |
| if (rd->mcasp->slot_width) |
| sbits = rd->mcasp->slot_width; |
| |
| snd_interval_any(&range); |
| range.empty = 1; |
| |
| for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) { |
| if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) { |
| uint bclk_freq = sbits*slots* |
| davinci_mcasp_dai_rates[i]; |
| int ppm; |
| |
| ppm = davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq, |
| false); |
| if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) { |
| if (range.empty) { |
| range.min = davinci_mcasp_dai_rates[i]; |
| range.empty = 0; |
| } |
| range.max = davinci_mcasp_dai_rates[i]; |
| } |
| } |
| } |
| |
| dev_dbg(rd->mcasp->dev, |
| "Frequencies %d-%d -> %d-%d for %d sbits and %d tdm slots\n", |
| ri->min, ri->max, range.min, range.max, sbits, slots); |
| |
| return snd_interval_refine(hw_param_interval(params, rule->var), |
| &range); |
| } |
| |
| static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params, |
| struct snd_pcm_hw_rule *rule) |
| { |
| struct davinci_mcasp_ruledata *rd = rule->private; |
| struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
| struct snd_mask nfmt; |
| int rate = params_rate(params); |
| int slots = rd->mcasp->tdm_slots; |
| int i, count = 0; |
| |
| snd_mask_none(&nfmt); |
| |
| for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { |
| if (snd_mask_test(fmt, i)) { |
| uint sbits = snd_pcm_format_width(i); |
| int ppm; |
| |
| if (rd->mcasp->slot_width) |
| sbits = rd->mcasp->slot_width; |
| |
| ppm = davinci_mcasp_calc_clk_div(rd->mcasp, |
| sbits * slots * rate, |
| false); |
| if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) { |
| snd_mask_set(&nfmt, i); |
| count++; |
| } |
| } |
| } |
| dev_dbg(rd->mcasp->dev, |
| "%d possible sample format for %d Hz and %d tdm slots\n", |
| count, rate, slots); |
| |
| return snd_mask_refine(fmt, &nfmt); |
| } |
| |
| static int davinci_mcasp_startup(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); |
| struct davinci_mcasp_ruledata *ruledata = |
| &mcasp->ruledata[substream->stream]; |
| u32 max_channels = 0; |
| int i, dir, ret; |
| int tdm_slots = mcasp->tdm_slots; |
| |
| /* Do not allow more then one stream per direction */ |
| if (mcasp->substreams[substream->stream]) |
| return -EBUSY; |
| |
| mcasp->substreams[substream->stream] = substream; |
| |
| if (mcasp->tdm_mask[substream->stream]) |
| tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]); |
| |
| if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) |
| return 0; |
| |
| /* |
| * Limit the maximum allowed channels for the first stream: |
| * number of serializers for the direction * tdm slots per serializer |
| */ |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| dir = TX_MODE; |
| else |
| dir = RX_MODE; |
| |
| for (i = 0; i < mcasp->num_serializer; i++) { |
| if (mcasp->serial_dir[i] == dir) |
| max_channels++; |
| } |
| ruledata->serializers = max_channels; |
| ruledata->mcasp = mcasp; |
| max_channels *= tdm_slots; |
| /* |
| * If the already active stream has less channels than the calculated |
| * limnit based on the seirializers * tdm_slots, we need to use that as |
| * a constraint for the second stream. |
| * Otherwise (first stream or less allowed channels) we use the |
| * calculated constraint. |
| */ |
| if (mcasp->channels && mcasp->channels < max_channels) |
| max_channels = mcasp->channels; |
| /* |
| * But we can always allow channels upto the amount of |
| * the available tdm_slots. |
| */ |
| if (max_channels < tdm_slots) |
| max_channels = tdm_slots; |
| |
| snd_pcm_hw_constraint_minmax(substream->runtime, |
| SNDRV_PCM_HW_PARAM_CHANNELS, |
| 0, max_channels); |
| |
| snd_pcm_hw_constraint_list(substream->runtime, |
| 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
| &mcasp->chconstr[substream->stream]); |
| |
| if (mcasp->slot_width) { |
| /* Only allow formats require <= slot_width bits on the bus */ |
| ret = snd_pcm_hw_rule_add(substream->runtime, 0, |
| SNDRV_PCM_HW_PARAM_FORMAT, |
| davinci_mcasp_hw_rule_slot_width, |
| ruledata, |
| SNDRV_PCM_HW_PARAM_FORMAT, -1); |
| if (ret) |
| return ret; |
| } |
| |
| /* |
| * If we rely on implicit BCLK divider setting we should |
| * set constraints based on what we can provide. |
| */ |
| if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) { |
| ret = snd_pcm_hw_rule_add(substream->runtime, 0, |
| SNDRV_PCM_HW_PARAM_RATE, |
| davinci_mcasp_hw_rule_rate, |
| ruledata, |
| SNDRV_PCM_HW_PARAM_FORMAT, -1); |
| if (ret) |
| return ret; |
| ret = snd_pcm_hw_rule_add(substream->runtime, 0, |
| SNDRV_PCM_HW_PARAM_FORMAT, |
| davinci_mcasp_hw_rule_format, |
| ruledata, |
| SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void davinci_mcasp_shutdown(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); |
| |
| mcasp->substreams[substream->stream] = NULL; |
| |
| if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) |
| return; |
| |
| if (!cpu_dai->active) |
| mcasp->channels = 0; |
| } |
| |
| static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = { |
| .startup = davinci_mcasp_startup, |
| .shutdown = davinci_mcasp_shutdown, |
| .trigger = davinci_mcasp_trigger, |
| .hw_params = davinci_mcasp_hw_params, |
| .set_fmt = davinci_mcasp_set_dai_fmt, |
| .set_clkdiv = davinci_mcasp_set_clkdiv, |
| .set_sysclk = davinci_mcasp_set_sysclk, |
| .set_tdm_slot = davinci_mcasp_set_tdm_slot, |
| }; |
| |
| static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); |
| |
| dai->playback_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK]; |
| dai->capture_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE]; |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int davinci_mcasp_suspend(struct snd_soc_dai *dai) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); |
| struct davinci_mcasp_context *context = &mcasp->context; |
| u32 reg; |
| int i; |
| |
| context->pm_state = pm_runtime_active(mcasp->dev); |
| if (!context->pm_state) |
| pm_runtime_get_sync(mcasp->dev); |
| |
| for (i = 0; i < ARRAY_SIZE(context_regs); i++) |
| context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]); |
| |
| if (mcasp->txnumevt) { |
| reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; |
| context->afifo_regs[0] = mcasp_get_reg(mcasp, reg); |
| } |
| if (mcasp->rxnumevt) { |
| reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; |
| context->afifo_regs[1] = mcasp_get_reg(mcasp, reg); |
| } |
| |
| for (i = 0; i < mcasp->num_serializer; i++) |
| context->xrsr_regs[i] = mcasp_get_reg(mcasp, |
| DAVINCI_MCASP_XRSRCTL_REG(i)); |
| |
| pm_runtime_put_sync(mcasp->dev); |
| |
| return 0; |
| } |
| |
| static int davinci_mcasp_resume(struct snd_soc_dai *dai) |
| { |
| struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); |
| struct davinci_mcasp_context *context = &mcasp->context; |
| u32 reg; |
| int i; |
| |
| pm_runtime_get_sync(mcasp->dev); |
| |
| for (i = 0; i < ARRAY_SIZE(context_regs); i++) |
| mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]); |
| |
| if (mcasp->txnumevt) { |
| reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET; |
| mcasp_set_reg(mcasp, reg, context->afifo_regs[0]); |
| } |
| if (mcasp->rxnumevt) { |
| reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; |
| mcasp_set_reg(mcasp, reg, context->afifo_regs[1]); |
| } |
| |
| for (i = 0; i < mcasp->num_serializer; i++) |
| mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), |
| context->xrsr_regs[i]); |
| |
| if (!context->pm_state) |
| pm_runtime_put_sync(mcasp->dev); |
| |
| return 0; |
| } |
| #else |
| #define davinci_mcasp_suspend NULL |
| #define davinci_mcasp_resume NULL |
| #endif |
| |
| #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000 |
| |
| #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \ |
| SNDRV_PCM_FMTBIT_U8 | \ |
| SNDRV_PCM_FMTBIT_S16_LE | \ |
| SNDRV_PCM_FMTBIT_U16_LE | \ |
| SNDRV_PCM_FMTBIT_S24_LE | \ |
| SNDRV_PCM_FMTBIT_U24_LE | \ |
| SNDRV_PCM_FMTBIT_S24_3LE | \ |
| SNDRV_PCM_FMTBIT_U24_3LE | \ |
| SNDRV_PCM_FMTBIT_S32_LE | \ |
| SNDRV_PCM_FMTBIT_U32_LE) |
| |
| static struct snd_soc_dai_driver davinci_mcasp_dai[] = { |
| { |
| .name = "davinci-mcasp.0", |
| .probe = davinci_mcasp_dai_probe, |
| .suspend = davinci_mcasp_suspend, |
| .resume = davinci_mcasp_resume, |
| .playback = { |
| .channels_min = 1, |
| .channels_max = 32 * 16, |
| .rates = DAVINCI_MCASP_RATES, |
| .formats = DAVINCI_MCASP_PCM_FMTS, |
| }, |
| .capture = { |
| .channels_min = 1, |
| .channels_max = 32 * 16, |
| .rates = DAVINCI_MCASP_RATES, |
| .formats = DAVINCI_MCASP_PCM_FMTS, |
| }, |
| .ops = &davinci_mcasp_dai_ops, |
| |
| .symmetric_samplebits = 1, |
| .symmetric_rates = 1, |
| }, |
| { |
| .name = "davinci-mcasp.1", |
| .probe = davinci_mcasp_dai_probe, |
| .playback = { |
| .channels_min = 1, |
| .channels_max = 384, |
| .rates = DAVINCI_MCASP_RATES, |
| .formats = DAVINCI_MCASP_PCM_FMTS, |
| }, |
| .ops = &davinci_mcasp_dai_ops, |
| }, |
| |
| }; |
| |
| static const struct snd_soc_component_driver davinci_mcasp_component = { |
| .name = "davinci-mcasp", |
| }; |
| |
| /* Some HW specific values and defaults. The rest is filled in from DT. */ |
| static struct davinci_mcasp_pdata dm646x_mcasp_pdata = { |
| .tx_dma_offset = 0x400, |
| .rx_dma_offset = 0x400, |
| .version = MCASP_VERSION_1, |
| }; |
| |
| static struct davinci_mcasp_pdata da830_mcasp_pdata = { |
| .tx_dma_offset = 0x2000, |
| .rx_dma_offset = 0x2000, |
| .version = MCASP_VERSION_2, |
| }; |
| |
| static struct davinci_mcasp_pdata am33xx_mcasp_pdata = { |
| .tx_dma_offset = 0, |
| .rx_dma_offset = 0, |
| .version = MCASP_VERSION_3, |
| }; |
| |
| static struct davinci_mcasp_pdata dra7_mcasp_pdata = { |
| /* The CFG port offset will be calculated if it is needed */ |
| .tx_dma_offset = 0, |
| .rx_dma_offset = 0, |
| .version = MCASP_VERSION_4, |
| }; |
| |
| static const struct of_device_id mcasp_dt_ids[] = { |
| { |
| .compatible = "ti,dm646x-mcasp-audio", |
| .data = &dm646x_mcasp_pdata, |
| }, |
| { |
| .compatible = "ti,da830-mcasp-audio", |
| .data = &da830_mcasp_pdata, |
| }, |
| { |
| .compatible = "ti,am33xx-mcasp-audio", |
| .data = &am33xx_mcasp_pdata, |
| }, |
| { |
| .compatible = "ti,dra7-mcasp-audio", |
| .data = &dra7_mcasp_pdata, |
| }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, mcasp_dt_ids); |
| |
| static int mcasp_reparent_fck(struct platform_device *pdev) |
| { |
| struct device_node *node = pdev->dev.of_node; |
| struct clk *gfclk, *parent_clk; |
| const char *parent_name; |
| int ret; |
| |
| if (!node) |
| return 0; |
| |
| parent_name = of_get_property(node, "fck_parent", NULL); |
| if (!parent_name) |
| return 0; |
| |
| dev_warn(&pdev->dev, "Update the bindings to use assigned-clocks!\n"); |
| |
| gfclk = clk_get(&pdev->dev, "fck"); |
| if (IS_ERR(gfclk)) { |
| dev_err(&pdev->dev, "failed to get fck\n"); |
| return PTR_ERR(gfclk); |
| } |
| |
| parent_clk = clk_get(NULL, parent_name); |
| if (IS_ERR(parent_clk)) { |
| dev_err(&pdev->dev, "failed to get parent clock\n"); |
| ret = PTR_ERR(parent_clk); |
| goto err1; |
| } |
| |
| ret = clk_set_parent(gfclk, parent_clk); |
| if (ret) { |
| dev_err(&pdev->dev, "failed to reparent fck\n"); |
| goto err2; |
| } |
| |
| err2: |
| clk_put(parent_clk); |
| err1: |
| clk_put(gfclk); |
| return ret; |
| } |
| |
| static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of( |
| struct platform_device *pdev) |
| { |
| struct device_node *np = pdev->dev.of_node; |
| struct davinci_mcasp_pdata *pdata = NULL; |
| const struct of_device_id *match = |
| of_match_device(mcasp_dt_ids, &pdev->dev); |
| struct of_phandle_args dma_spec; |
| |
| const u32 *of_serial_dir32; |
| u32 val; |
| int i, ret = 0; |
| |
| if (pdev->dev.platform_data) { |
| pdata = pdev->dev.platform_data; |
| return pdata; |
| } else if (match) { |
| pdata = devm_kmemdup(&pdev->dev, match->data, sizeof(*pdata), |
| GFP_KERNEL); |
| if (!pdata) { |
| ret = -ENOMEM; |
| return pdata; |
| } |
| } else { |
| /* control shouldn't reach here. something is wrong */ |
| ret = -EINVAL; |
| goto nodata; |
| } |
| |
| ret = of_property_read_u32(np, "op-mode", &val); |
| if (ret >= 0) |
| pdata->op_mode = val; |
| |
| ret = of_property_read_u32(np, "tdm-slots", &val); |
| if (ret >= 0) { |
| if (val < 2 || val > 32) { |
| dev_err(&pdev->dev, |
| "tdm-slots must be in rage [2-32]\n"); |
| ret = -EINVAL; |
| goto nodata; |
| } |
| |
| pdata->tdm_slots = val; |
| } |
| |
| of_serial_dir32 = of_get_property(np, "serial-dir", &val); |
| val /= sizeof(u32); |
| if (of_serial_dir32) { |
| u8 *of_serial_dir = devm_kzalloc(&pdev->dev, |
| (sizeof(*of_serial_dir) * val), |
| GFP_KERNEL); |
| if (!of_serial_dir) { |
| ret = -ENOMEM; |
| goto nodata; |
| } |
| |
| for (i = 0; i < val; i++) |
| of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]); |
| |
| pdata->num_serializer = val; |
| pdata->serial_dir = of_serial_dir; |
| } |
| |
| ret = of_property_match_string(np, "dma-names", "tx"); |
| if (ret < 0) |
| goto nodata; |
| |
| ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret, |
| &dma_spec); |
| if (ret < 0) |
| goto nodata; |
| |
| pdata->tx_dma_channel = dma_spec.args[0]; |
| |
| /* RX is not valid in DIT mode */ |
| if (pdata->op_mode != DAVINCI_MCASP_DIT_MODE) { |
| ret = of_property_match_string(np, "dma-names", "rx"); |
| if (ret < 0) |
| goto nodata; |
| |
| ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret, |
| &dma_spec); |
| if (ret < 0) |
| goto nodata; |
| |
| pdata->rx_dma_channel = dma_spec.args[0]; |
| } |
| |
| ret = of_property_read_u32(np, "tx-num-evt", &val); |
| if (ret >= 0) |
| pdata->txnumevt = val; |
| |
| ret = of_property_read_u32(np, "rx-num-evt", &val); |
| if (ret >= 0) |
| pdata->rxnumevt = val; |
| |
| ret = of_property_read_u32(np, "sram-size-playback", &val); |
| if (ret >= 0) |
| pdata->sram_size_playback = val; |
| |
| ret = of_property_read_u32(np, "sram-size-capture", &val); |
| if (ret >= 0) |
| pdata->sram_size_capture = val; |
| |
| return pdata; |
| |
| nodata: |
| if (ret < 0) { |
| dev_err(&pdev->dev, "Error populating platform data, err %d\n", |
| ret); |
| pdata = NULL; |
| } |
| return pdata; |
| } |
| |
| enum { |
| PCM_EDMA, |
| PCM_SDMA, |
| }; |
| static const char *sdma_prefix = "ti,omap"; |
| |
| static int davinci_mcasp_get_dma_type(struct davinci_mcasp *mcasp) |
| { |
| struct dma_chan *chan; |
| const char *tmp; |
| int ret = PCM_EDMA; |
| |
| if (!mcasp->dev->of_node) |
| return PCM_EDMA; |
| |
| tmp = mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data; |
| chan = dma_request_slave_channel_reason(mcasp->dev, tmp); |
| if (IS_ERR(chan)) { |
| if (PTR_ERR(chan) != -EPROBE_DEFER) |
| dev_err(mcasp->dev, |
| "Can't verify DMA configuration (%ld)\n", |
| PTR_ERR(chan)); |
| return PTR_ERR(chan); |
| } |
| if (WARN_ON(!chan->device || !chan->device->dev)) |
| return -EINVAL; |
| |
| if (chan->device->dev->of_node) |
| ret = of_property_read_string(chan->device->dev->of_node, |
| "compatible", &tmp); |
| else |
| dev_dbg(mcasp->dev, "DMA controller has no of-node\n"); |
| |
| dma_release_channel(chan); |
| if (ret) |
| return ret; |
| |
| dev_dbg(mcasp->dev, "DMA controller compatible = \"%s\"\n", tmp); |
| if (!strncmp(tmp, sdma_prefix, strlen(sdma_prefix))) |
| return PCM_SDMA; |
| |
| return PCM_EDMA; |
| } |
| |
| static u32 davinci_mcasp_txdma_offset(struct davinci_mcasp_pdata *pdata) |
| { |
| int i; |
| u32 offset = 0; |
| |
| if (pdata->version != MCASP_VERSION_4) |
| return pdata->tx_dma_offset; |
| |
| for (i = 0; i < pdata->num_serializer; i++) { |
| if (pdata->serial_dir[i] == TX_MODE) { |
| if (!offset) { |
| offset = DAVINCI_MCASP_TXBUF_REG(i); |
| } else { |
| pr_err("%s: Only one serializer allowed!\n", |
| __func__); |
| break; |
| } |
| } |
| } |
| |
| return offset; |
| } |
| |
| static u32 davinci_mcasp_rxdma_offset(struct davinci_mcasp_pdata *pdata) |
| { |
| int i; |
| u32 offset = 0; |
| |
| if (pdata->version != MCASP_VERSION_4) |
| return pdata->rx_dma_offset; |
| |
| for (i = 0; i < pdata->num_serializer; i++) { |
| if (pdata->serial_dir[i] == RX_MODE) { |
| if (!offset) { |
| offset = DAVINCI_MCASP_RXBUF_REG(i); |
| } else { |
| pr_err("%s: Only one serializer allowed!\n", |
| __func__); |
| break; |
| } |
| } |
| } |
| |
| return offset; |
| } |
| |
| static int davinci_mcasp_probe(struct platform_device *pdev) |
| { |
| struct snd_dmaengine_dai_dma_data *dma_data; |
| struct resource *mem, *res, *dat; |
| struct davinci_mcasp_pdata *pdata; |
| struct davinci_mcasp *mcasp; |
| char *irq_name; |
| int *dma; |
| int irq; |
| int ret; |
| |
| if (!pdev->dev.platform_data && !pdev->dev.of_node) { |
| dev_err(&pdev->dev, "No platform data supplied\n"); |
| return -EINVAL; |
| } |
| |
| mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp), |
| GFP_KERNEL); |
| if (!mcasp) |
| return -ENOMEM; |
| |
| pdata = davinci_mcasp_set_pdata_from_of(pdev); |
| if (!pdata) { |
| dev_err(&pdev->dev, "no platform data\n"); |
| return -EINVAL; |
| } |
| |
| mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu"); |
| if (!mem) { |
| dev_warn(mcasp->dev, |
| "\"mpu\" mem resource not found, using index 0\n"); |
| mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!mem) { |
| dev_err(&pdev->dev, "no mem resource?\n"); |
| return -ENODEV; |
| } |
| } |
| |
| mcasp->base = devm_ioremap_resource(&pdev->dev, mem); |
| if (IS_ERR(mcasp->base)) |
| return PTR_ERR(mcasp->base); |
| |
| pm_runtime_enable(&pdev->dev); |
| |
| mcasp->op_mode = pdata->op_mode; |
| /* sanity check for tdm slots parameter */ |
| if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) { |
| if (pdata->tdm_slots < 2) { |
| dev_err(&pdev->dev, "invalid tdm slots: %d\n", |
| pdata->tdm_slots); |
| mcasp->tdm_slots = 2; |
| } else if (pdata->tdm_slots > 32) { |
| dev_err(&pdev->dev, "invalid tdm slots: %d\n", |
| pdata->tdm_slots); |
| mcasp->tdm_slots = 32; |
| } else { |
| mcasp->tdm_slots = pdata->tdm_slots; |
| } |
| } |
| |
| mcasp->num_serializer = pdata->num_serializer; |
| #ifdef CONFIG_PM_SLEEP |
| mcasp->context.xrsr_regs = devm_kzalloc(&pdev->dev, |
| sizeof(u32) * mcasp->num_serializer, |
| GFP_KERNEL); |
| if (!mcasp->context.xrsr_regs) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| #endif |
| mcasp->serial_dir = pdata->serial_dir; |
| mcasp->version = pdata->version; |
| mcasp->txnumevt = pdata->txnumevt; |
| mcasp->rxnumevt = pdata->rxnumevt; |
| |
| mcasp->dev = &pdev->dev; |
| |
| irq = platform_get_irq_byname(pdev, "common"); |
| if (irq >= 0) { |
| irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common", |
| dev_name(&pdev->dev)); |
| if (!irq_name) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| davinci_mcasp_common_irq_handler, |
| IRQF_ONESHOT | IRQF_SHARED, |
| irq_name, mcasp); |
| if (ret) { |
| dev_err(&pdev->dev, "common IRQ request failed\n"); |
| goto err; |
| } |
| |
| mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN; |
| mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN; |
| } |
| |
| irq = platform_get_irq_byname(pdev, "rx"); |
| if (irq >= 0) { |
| irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_rx", |
| dev_name(&pdev->dev)); |
| if (!irq_name) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| davinci_mcasp_rx_irq_handler, |
| IRQF_ONESHOT, irq_name, mcasp); |
| if (ret) { |
| dev_err(&pdev->dev, "RX IRQ request failed\n"); |
| goto err; |
| } |
| |
| mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN; |
| } |
| |
| irq = platform_get_irq_byname(pdev, "tx"); |
| if (irq >= 0) { |
| irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_tx", |
| dev_name(&pdev->dev)); |
| if (!irq_name) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| davinci_mcasp_tx_irq_handler, |
| IRQF_ONESHOT, irq_name, mcasp); |
| if (ret) { |
| dev_err(&pdev->dev, "TX IRQ request failed\n"); |
| goto err; |
| } |
| |
| mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN; |
| } |
| |
| dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat"); |
| if (dat) |
| mcasp->dat_port = true; |
| |
| dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK]; |
| if (dat) |
| dma_data->addr = dat->start; |
| else |
| dma_data->addr = mem->start + davinci_mcasp_txdma_offset(pdata); |
| |
| dma = &mcasp->dma_request[SNDRV_PCM_STREAM_PLAYBACK]; |
| res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| if (res) |
| *dma = res->start; |
| else |
| *dma = pdata->tx_dma_channel; |
| |
| /* dmaengine filter data for DT and non-DT boot */ |
| if (pdev->dev.of_node) |
| dma_data->filter_data = "tx"; |
| else |
| dma_data->filter_data = dma; |
| |
| /* RX is not valid in DIT mode */ |
| if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) { |
| dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE]; |
| if (dat) |
| dma_data->addr = dat->start; |
| else |
| dma_data->addr = |
| mem->start + davinci_mcasp_rxdma_offset(pdata); |
| |
| dma = &mcasp->dma_request[SNDRV_PCM_STREAM_CAPTURE]; |
| res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
| if (res) |
| *dma = res->start; |
| else |
| *dma = pdata->rx_dma_channel; |
| |
| /* dmaengine filter data for DT and non-DT boot */ |
| if (pdev->dev.of_node) |
| dma_data->filter_data = "rx"; |
| else |
| dma_data->filter_data = dma; |
| } |
| |
| if (mcasp->version < MCASP_VERSION_3) { |
| mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE; |
| /* dma_params->dma_addr is pointing to the data port address */ |
| mcasp->dat_port = true; |
| } else { |
| mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE; |
| } |
| |
| /* Allocate memory for long enough list for all possible |
| * scenarios. Maximum number tdm slots is 32 and there cannot |
| * be more serializers than given in the configuration. The |
| * serializer directions could be taken into account, but it |
| * would make code much more complex and save only couple of |
| * bytes. |
| */ |
| mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list = |
| devm_kzalloc(mcasp->dev, sizeof(unsigned int) * |
| (32 + mcasp->num_serializer - 1), |
| GFP_KERNEL); |
| |
| mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list = |
| devm_kzalloc(mcasp->dev, sizeof(unsigned int) * |
| (32 + mcasp->num_serializer - 1), |
| GFP_KERNEL); |
| |
| if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list || |
| !mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| ret = davinci_mcasp_set_ch_constraints(mcasp); |
| if (ret) |
| goto err; |
| |
| dev_set_drvdata(&pdev->dev, mcasp); |
| |
| mcasp_reparent_fck(pdev); |
| |
| ret = devm_snd_soc_register_component(&pdev->dev, |
| &davinci_mcasp_component, |
| &davinci_mcasp_dai[pdata->op_mode], 1); |
| |
| if (ret != 0) |
| goto err; |
| |
| ret = davinci_mcasp_get_dma_type(mcasp); |
| switch (ret) { |
| case PCM_EDMA: |
| #if IS_BUILTIN(CONFIG_SND_EDMA_SOC) || \ |
| (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \ |
| IS_MODULE(CONFIG_SND_EDMA_SOC)) |
| ret = edma_pcm_platform_register(&pdev->dev); |
| #else |
| dev_err(&pdev->dev, "Missing SND_EDMA_SOC\n"); |
| ret = -EINVAL; |
| goto err; |
| #endif |
| break; |
| case PCM_SDMA: |
| #if IS_BUILTIN(CONFIG_SND_OMAP_SOC) || \ |
| (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \ |
| IS_MODULE(CONFIG_SND_OMAP_SOC)) |
| ret = omap_pcm_platform_register(&pdev->dev); |
| #else |
| dev_err(&pdev->dev, "Missing SND_SDMA_SOC\n"); |
| ret = -EINVAL; |
| goto err; |
| #endif |
| break; |
| default: |
| dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret); |
| case -EPROBE_DEFER: |
| goto err; |
| break; |
| } |
| |
| if (ret) { |
| dev_err(&pdev->dev, "register PCM failed: %d\n", ret); |
| goto err; |
| } |
| |
| return 0; |
| |
| err: |
| pm_runtime_disable(&pdev->dev); |
| return ret; |
| } |
| |
| static int davinci_mcasp_remove(struct platform_device *pdev) |
| { |
| pm_runtime_disable(&pdev->dev); |
| |
| return 0; |
| } |
| |
| static struct platform_driver davinci_mcasp_driver = { |
| .probe = davinci_mcasp_probe, |
| .remove = davinci_mcasp_remove, |
| .driver = { |
| .name = "davinci-mcasp", |
| .of_match_table = mcasp_dt_ids, |
| }, |
| }; |
| |
| module_platform_driver(davinci_mcasp_driver); |
| |
| MODULE_AUTHOR("Steve Chen"); |
| MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface"); |
| MODULE_LICENSE("GPL"); |