diff options
Diffstat (limited to 'sound/soc/ti/davinci-mcasp.c')
| -rw-r--r-- | sound/soc/ti/davinci-mcasp.c | 2485 |
1 files changed, 2485 insertions, 0 deletions
diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c new file mode 100644 index 000000000..a6b72ad53 --- /dev/null +++ b/sound/soc/ti/davinci-mcasp.c @@ -0,0 +1,2485 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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 + */ + +#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 <linux/bitmap.h> +#include <linux/gpio/driver.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 "edma-pcm.h" +#include "sdma-pcm.h" +#include "udma-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_PFUNC_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 dismod; + 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; + u32 auxclk_fs_ratio; + + unsigned long pdir; /* Pin direction bitfield */ + + /* McASP FIFO related */ + u8 txnumevt; + u8 rxnumevt; + + bool dat_port; + + /* Used for comstraint setting on the second stream */ + u32 channels; + int max_format_width; + u8 active_serializers[2]; + +#ifdef CONFIG_GPIOLIB + struct gpio_chip gpio_chip; +#endif + +#ifdef CONFIG_PM + 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 inline void mcasp_set_clk_pdir(struct davinci_mcasp *mcasp, bool enable) +{ + u32 bit = PIN_BIT_AMUTE; + + for_each_set_bit_from(bit, &mcasp->pdir, PIN_BIT_AFSR + 1) { + if (enable) + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); + else + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); + } +} + +static inline void mcasp_set_axr_pdir(struct davinci_mcasp *mcasp, bool enable) +{ + u32 bit; + + for_each_set_bit(bit, &mcasp->pdir, PIN_BIT_AMUTE) { + if (enable) + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); + else + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit)); + } +} + +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); + mcasp_set_clk_pdir(mcasp, true); + } + + /* Activate serializer(s) */ + mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF); + 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); + mcasp_set_clk_pdir(mcasp, true); + + /* Activate serializer(s) */ + mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); + 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++; + + mcasp_set_axr_pdir(mcasp, true); + + /* 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_clk_pdir(mcasp, false); + 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; + else + mcasp_set_clk_pdir(mcasp, false); + + + 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); + } + + mcasp_set_axr_pdir(mcasp, false); +} + +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_stop_xrun(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_stop_xrun(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_RIGHT_J: + 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); + + /* BCLK */ + set_bit(PIN_BIT_ACLKX, &mcasp->pdir); + set_bit(PIN_BIT_ACLKR, &mcasp->pdir); + /* Frame Sync */ + set_bit(PIN_BIT_AFSX, &mcasp->pdir); + set_bit(PIN_BIT_AFSR, &mcasp->pdir); + + 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); + + /* BCLK */ + set_bit(PIN_BIT_ACLKX, &mcasp->pdir); + set_bit(PIN_BIT_ACLKR, &mcasp->pdir); + /* Frame Sync */ + clear_bit(PIN_BIT_AFSX, &mcasp->pdir); + clear_bit(PIN_BIT_AFSR, &mcasp->pdir); + + 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); + + /* BCLK */ + clear_bit(PIN_BIT_ACLKX, &mcasp->pdir); + clear_bit(PIN_BIT_ACLKR, &mcasp->pdir); + /* Frame Sync */ + set_bit(PIN_BIT_AFSX, &mcasp->pdir); + set_bit(PIN_BIT_AFSR, &mcasp->pdir); + + 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); + + /* BCLK */ + clear_bit(PIN_BIT_ACLKX, &mcasp->pdir); + clear_bit(PIN_BIT_ACLKR, &mcasp->pdir); + /* Frame Sync */ + clear_bit(PIN_BIT_AFSX, &mcasp->pdir); + clear_bit(PIN_BIT_AFSR, &mcasp->pdir); + + 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 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_IN) { + switch (clk_id) { + case MCASP_CLK_HCLK_AHCLK: + mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, + AHCLKXE); + mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, + AHCLKRE); + clear_bit(PIN_BIT_AHCLKX, &mcasp->pdir); + break; + case MCASP_CLK_HCLK_AUXCLK: + mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, + AHCLKXE); + mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, + AHCLKRE); + set_bit(PIN_BIT_AHCLKX, &mcasp->pdir); + break; + default: + dev_err(mcasp->dev, "Invalid clk id: %d\n", clk_id); + goto out; + } + } else { + /* Select AUXCLK as HCLK */ + mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE); + mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE); + set_bit(PIN_BIT_AHCLKX, &mcasp->pdir); + } + /* + * When AHCLK X/R is selected to be output it means that the HCLK is + * the same clock - coming via AUXCLK. + */ + mcasp->sysclk_freq = freq; +out: + 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, rx_rotate, slot_width; + u32 mask = (1ULL << sample_width) - 1; + + if (mcasp->slot_width) + slot_width = mcasp->slot_width; + else if (mcasp->max_format_width) + slot_width = mcasp->max_format_width; + else + slot_width = sample_width; + /* + * TX rotation: + * right aligned formats: rotate w/ slot_width + * left aligned formats: rotate w/ sample_width + * + * RX rotation: + * right aligned formats: no rotation needed + * left aligned formats: rotate w/ (slot_width - sample_width) + */ + if ((mcasp->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) == + SND_SOC_DAIFMT_RIGHT_J) { + tx_rotate = (slot_width / 4) & 0x7; + rx_rotate = 0; + } else { + tx_rotate = (sample_width / 4) & 0x7; + 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; + u8 max_rx_serializers, max_tx_serializers; + int active_serializers, numevt; + u32 reg; + /* Default configuration */ + if (mcasp->version < MCASP_VERSION_3) + mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT); + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF); + mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS); + max_tx_serializers = max_active_serializers; + max_rx_serializers = + mcasp->active_serializers[SNDRV_PCM_STREAM_CAPTURE]; + } else { + mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF); + mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS); + max_tx_serializers = + mcasp->active_serializers[SNDRV_PCM_STREAM_PLAYBACK]; + max_rx_serializers = max_active_serializers; + } + + 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_tx_serializers) { + mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), + mcasp->dismod, DISMOD_MASK); + set_bit(PIN_BIT_AXR(i), &mcasp->pdir); + tx_ser++; + } else if (mcasp->serial_dir[i] == RX_MODE && + rx_ser < max_rx_serializers) { + clear_bit(PIN_BIT_AXR(i), &mcasp->pdir); + rx_ser++; + } else { + /* Inactive or unused pin, set it to inactive */ + mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), + SRMOD_INACTIVE, SRMOD_MASK); + /* If unused, set DISMOD for the pin */ + if (mcasp->serial_dir[i] != INACTIVE_MODE) + mcasp_mod_bits(mcasp, + DAVINCI_MCASP_XRSRCTL_REG(i), + mcasp->dismod, DISMOD_MASK); + clear_bit(PIN_BIT_AXR(i), &mcasp->pdir); + } + } + + 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; + } + + goto out; + } + + 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; + +out: + mcasp->active_serializers[stream] = active_serializers; + + 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 sysclk_freq, + unsigned int bclk_freq, bool set) +{ + u32 reg = mcasp_get_reg(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG); + int div = sysclk_freq / bclk_freq; + int rem = sysclk_freq % bclk_freq; + int error_ppm; + 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 inline u32 davinci_mcasp_tx_delay(struct davinci_mcasp *mcasp) +{ + if (!mcasp->txnumevt) + return 0; + + return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_WFIFOSTS_OFFSET); +} + +static inline u32 davinci_mcasp_rx_delay(struct davinci_mcasp *mcasp) +{ + if (!mcasp->rxnumevt) + return 0; + + return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_RFIFOSTS_OFFSET); +} + +static snd_pcm_sframes_t davinci_mcasp_delay( + struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai); + u32 fifo_use; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + fifo_use = davinci_mcasp_tx_delay(mcasp); + else + fifo_use = davinci_mcasp_rx_delay(mcasp); + + /* + * Divide the used locations with the channel count to get the + * FIFO usage in samples (don't care about partial samples in the + * buffer). + */ + return fifo_use / substream->runtime->channels; +} + +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; + + 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; + } + + 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, mcasp->sysclk_freq, + 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; + + davinci_config_channel_size(mcasp, word_length); + + if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) { + mcasp->channels = channels; + if (!mcasp->max_format_width) + mcasp->max_format_width = word_length; + } + + 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 int davinci_mcasp_hw_rule_format_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, format_width; + + snd_mask_none(&nfmt); + format_width = rd->mcasp->max_format_width; + + for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { + if (snd_mask_test(fmt, i)) { + if (snd_pcm_format_width(i) == format_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]; + unsigned int sysclk_freq; + int ppm; + + if (rd->mcasp->auxclk_fs_ratio) + sysclk_freq = davinci_mcasp_dai_rates[i] * + rd->mcasp->auxclk_fs_ratio; + else + sysclk_freq = rd->mcasp->sysclk_freq; + + ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq, + 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); + unsigned int sysclk_freq; + int ppm; + + if (rd->mcasp->auxclk_fs_ratio) + sysclk_freq = rate * + rd->mcasp->auxclk_fs_ratio; + else + sysclk_freq = rd->mcasp->sysclk_freq; + + if (rd->mcasp->slot_width) + sbits = rd->mcasp->slot_width; + + ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq, + 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_hw_rule_min_periodsize( + struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) +{ + struct snd_interval *period_size = hw_param_interval(params, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE); + struct snd_interval frames; + + snd_interval_any(&frames); + frames.min = 64; + frames.integer = 1; + + return snd_interval_refine(period_size, &frames); +} + +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 + * limit based on the seirializers * tdm_slots, and only one serializer + * is in use we need to use that as a constraint for the second stream. + * Otherwise (first stream or less allowed channels or more than one + * serializer in use) we use the calculated constraint. + */ + if (mcasp->channels && mcasp->channels < max_channels && + ruledata->serializers == 1) + 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->max_format_width) { + /* + * Only allow formats which require same amount of bits on the + * bus as the currently running stream + */ + ret = snd_pcm_hw_rule_add(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_FORMAT, + davinci_mcasp_hw_rule_format_width, + ruledata, + SNDRV_PCM_HW_PARAM_FORMAT, -1); + if (ret) + return ret; + } + else 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; + } + + snd_pcm_hw_rule_add(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, + davinci_mcasp_hw_rule_min_periodsize, NULL, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); + + 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; + mcasp->active_serializers[substream->stream] = 0; + + if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE) + return; + + if (!snd_soc_dai_active(cpu_dai)) { + mcasp->channels = 0; + mcasp->max_format_width = 0; + } +} + +static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = { + .startup = davinci_mcasp_startup, + .shutdown = davinci_mcasp_shutdown, + .trigger = davinci_mcasp_trigger, + .delay = davinci_mcasp_delay, + .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; +} + +#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, + .playback = { + .stream_name = "IIS Playback", + .channels_min = 1, + .channels_max = 32 * 16, + .rates = DAVINCI_MCASP_RATES, + .formats = DAVINCI_MCASP_PCM_FMTS, + }, + .capture = { + .stream_name = "IIS Capture", + .channels_min = 1, + .channels_max = 32 * 16, + .rates = DAVINCI_MCASP_RATES, + .formats = DAVINCI_MCASP_PCM_FMTS, + }, + .ops = &davinci_mcasp_dai_ops, + + .symmetric_rates = 1, + }, + { + .name = "davinci-mcasp.1", + .probe = davinci_mcasp_dai_probe, + .playback = { + .stream_name = "DIT 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; + pdata->dismod = DISMOD_LOW; + return pdata; + } else if (match) { + pdata = devm_kmemdup(&pdev->dev, match->data, sizeof(*pdata), + GFP_KERNEL); + if (!pdata) + return NULL; + } 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; + + ret = of_property_read_u32(np, "dismod", &val); + if (ret >= 0) { + if (val == 0 || val == 2 || val == 3) { + pdata->dismod = DISMOD_VAL(val); + } else { + dev_warn(&pdev->dev, "Invalid dismod value: %u\n", val); + pdata->dismod = DISMOD_LOW; + } + } else { + pdata->dismod = DISMOD_LOW; + } + + 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, + PCM_UDMA, +}; +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_chan(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)) { + dma_release_channel(chan); + 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; + else if (strstr(tmp, "udmap")) + return PCM_UDMA; + + 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; +} + +#ifdef CONFIG_GPIOLIB +static int davinci_mcasp_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + + if (mcasp->num_serializer && offset < mcasp->num_serializer && + mcasp->serial_dir[offset] != INACTIVE_MODE) { + dev_err(mcasp->dev, "AXR%u pin is used for audio\n", offset); + return -EBUSY; + } + + /* Do not change the PIN yet */ + + return pm_runtime_get_sync(mcasp->dev); +} + +static void davinci_mcasp_gpio_free(struct gpio_chip *chip, unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + + /* Set the direction to input */ + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); + + /* Set the pin as McASP pin */ + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); + + pm_runtime_put_sync(mcasp->dev); +} + +static int davinci_mcasp_gpio_direction_out(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + if (value) + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); + else + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG); + if (!(val & BIT(offset))) { + /* Set the pin as GPIO pin */ + mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); + + /* Set the direction to output */ + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); + } + + return 0; +} + +static void davinci_mcasp_gpio_set(struct gpio_chip *chip, unsigned offset, + int value) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + + if (value) + mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); + else + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset)); +} + +static int davinci_mcasp_gpio_direction_in(struct gpio_chip *chip, + unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG); + if (!(val & BIT(offset))) { + /* Set the direction to input */ + mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset)); + + /* Set the pin as GPIO pin */ + mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset)); + } + + return 0; +} + +static int davinci_mcasp_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDSET_REG); + if (val & BIT(offset)) + return 1; + + return 0; +} + +static int davinci_mcasp_gpio_get_direction(struct gpio_chip *chip, + unsigned offset) +{ + struct davinci_mcasp *mcasp = gpiochip_get_data(chip); + u32 val; + + val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG); + if (val & BIT(offset)) + return 0; + + return 1; +} + +static const struct gpio_chip davinci_mcasp_template_chip = { + .owner = THIS_MODULE, + .request = davinci_mcasp_gpio_request, + .free = davinci_mcasp_gpio_free, + .direction_output = davinci_mcasp_gpio_direction_out, + .set = davinci_mcasp_gpio_set, + .direction_input = davinci_mcasp_gpio_direction_in, + .get = davinci_mcasp_gpio_get, + .get_direction = davinci_mcasp_gpio_get_direction, + .base = -1, + .ngpio = 32, +}; + +static int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp) +{ + if (!of_property_read_bool(mcasp->dev->of_node, "gpio-controller")) + return 0; + + mcasp->gpio_chip = davinci_mcasp_template_chip; + mcasp->gpio_chip.label = dev_name(mcasp->dev); + mcasp->gpio_chip.parent = mcasp->dev; +#ifdef CONFIG_OF_GPIO + mcasp->gpio_chip.of_node = mcasp->dev->of_node; +#endif + + return devm_gpiochip_add_data(mcasp->dev, &mcasp->gpio_chip, mcasp); +} + +#else /* CONFIG_GPIOLIB */ +static inline int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp) +{ + return 0; +} +#endif /* CONFIG_GPIOLIB */ + +static int davinci_mcasp_get_dt_params(struct davinci_mcasp *mcasp) +{ + struct device_node *np = mcasp->dev->of_node; + int ret; + u32 val; + + if (!np) + return 0; + + ret = of_property_read_u32(np, "auxclk-fs-ratio", &val); + if (ret >= 0) + mcasp->auxclk_fs_ratio = val; + + return 0; +} + +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(&pdev->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 + mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev, + mcasp->num_serializer, sizeof(u32), + 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->dismod = pdata->dismod; + + 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_kcalloc(mcasp->dev, + 32 + mcasp->num_serializer - 1, + sizeof(unsigned int), + GFP_KERNEL); + + mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list = + devm_kcalloc(mcasp->dev, + 32 + mcasp->num_serializer - 1, + sizeof(unsigned int), + 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); + + /* All PINS as McASP */ + pm_runtime_get_sync(mcasp->dev); + mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000); + pm_runtime_put(mcasp->dev); + + ret = davinci_mcasp_init_gpiochip(mcasp); + if (ret) + goto err; + + ret = davinci_mcasp_get_dt_params(mcasp); + if (ret) + return -EINVAL; + + 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: + ret = edma_pcm_platform_register(&pdev->dev); + break; + case PCM_SDMA: + ret = sdma_pcm_platform_register(&pdev->dev, "tx", "rx"); + break; + case PCM_UDMA: + ret = udma_pcm_platform_register(&pdev->dev); + 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; +} + +#ifdef CONFIG_PM +static int davinci_mcasp_runtime_suspend(struct device *dev) +{ + struct davinci_mcasp *mcasp = dev_get_drvdata(dev); + struct davinci_mcasp_context *context = &mcasp->context; + u32 reg; + int i; + + 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)); + + return 0; +} + +static int davinci_mcasp_runtime_resume(struct device *dev) +{ + struct davinci_mcasp *mcasp = dev_get_drvdata(dev); + struct davinci_mcasp_context *context = &mcasp->context; + u32 reg; + int i; + + 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]); + + return 0; +} + +#endif + +static const struct dev_pm_ops davinci_mcasp_pm_ops = { + SET_RUNTIME_PM_OPS(davinci_mcasp_runtime_suspend, + davinci_mcasp_runtime_resume, + NULL) +}; + +static struct platform_driver davinci_mcasp_driver = { + .probe = davinci_mcasp_probe, + .remove = davinci_mcasp_remove, + .driver = { + .name = "davinci-mcasp", + .pm = &davinci_mcasp_pm_ops, + .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"); |