| /* |
| * Fifo-attached Serial Interface (FSI) support for SH7724 |
| * |
| * Copyright (C) 2009 Renesas Solutions Corp. |
| * Kuninori Morimoto <morimoto.kuninori@renesas.com> |
| * |
| * Based on ssi.c |
| * Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/of_device.h> |
| #include <linux/scatterlist.h> |
| #include <linux/sh_dma.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/workqueue.h> |
| #include <sound/soc.h> |
| #include <sound/pcm_params.h> |
| #include <sound/sh_fsi.h> |
| |
| /* PortA/PortB register */ |
| #define REG_DO_FMT 0x0000 |
| #define REG_DOFF_CTL 0x0004 |
| #define REG_DOFF_ST 0x0008 |
| #define REG_DI_FMT 0x000C |
| #define REG_DIFF_CTL 0x0010 |
| #define REG_DIFF_ST 0x0014 |
| #define REG_CKG1 0x0018 |
| #define REG_CKG2 0x001C |
| #define REG_DIDT 0x0020 |
| #define REG_DODT 0x0024 |
| #define REG_MUTE_ST 0x0028 |
| #define REG_OUT_DMAC 0x002C |
| #define REG_OUT_SEL 0x0030 |
| #define REG_IN_DMAC 0x0038 |
| |
| /* master register */ |
| #define MST_CLK_RST 0x0210 |
| #define MST_SOFT_RST 0x0214 |
| #define MST_FIFO_SZ 0x0218 |
| |
| /* core register (depend on FSI version) */ |
| #define A_MST_CTLR 0x0180 |
| #define B_MST_CTLR 0x01A0 |
| #define CPU_INT_ST 0x01F4 |
| #define CPU_IEMSK 0x01F8 |
| #define CPU_IMSK 0x01FC |
| #define INT_ST 0x0200 |
| #define IEMSK 0x0204 |
| #define IMSK 0x0208 |
| |
| /* DO_FMT */ |
| /* DI_FMT */ |
| #define CR_BWS_MASK (0x3 << 20) /* FSI2 */ |
| #define CR_BWS_24 (0x0 << 20) /* FSI2 */ |
| #define CR_BWS_16 (0x1 << 20) /* FSI2 */ |
| #define CR_BWS_20 (0x2 << 20) /* FSI2 */ |
| |
| #define CR_DTMD_PCM (0x0 << 8) /* FSI2 */ |
| #define CR_DTMD_SPDIF_PCM (0x1 << 8) /* FSI2 */ |
| #define CR_DTMD_SPDIF_STREAM (0x2 << 8) /* FSI2 */ |
| |
| #define CR_MONO (0x0 << 4) |
| #define CR_MONO_D (0x1 << 4) |
| #define CR_PCM (0x2 << 4) |
| #define CR_I2S (0x3 << 4) |
| #define CR_TDM (0x4 << 4) |
| #define CR_TDM_D (0x5 << 4) |
| |
| /* OUT_DMAC */ |
| /* IN_DMAC */ |
| #define VDMD_MASK (0x3 << 4) |
| #define VDMD_FRONT (0x0 << 4) /* Package in front */ |
| #define VDMD_BACK (0x1 << 4) /* Package in back */ |
| #define VDMD_STREAM (0x2 << 4) /* Stream mode(16bit * 2) */ |
| |
| #define DMA_ON (0x1 << 0) |
| |
| /* DOFF_CTL */ |
| /* DIFF_CTL */ |
| #define IRQ_HALF 0x00100000 |
| #define FIFO_CLR 0x00000001 |
| |
| /* DOFF_ST */ |
| #define ERR_OVER 0x00000010 |
| #define ERR_UNDER 0x00000001 |
| #define ST_ERR (ERR_OVER | ERR_UNDER) |
| |
| /* CKG1 */ |
| #define ACKMD_MASK 0x00007000 |
| #define BPFMD_MASK 0x00000700 |
| #define DIMD (1 << 4) |
| #define DOMD (1 << 0) |
| |
| /* A/B MST_CTLR */ |
| #define BP (1 << 4) /* Fix the signal of Biphase output */ |
| #define SE (1 << 0) /* Fix the master clock */ |
| |
| /* CLK_RST */ |
| #define CRB (1 << 4) |
| #define CRA (1 << 0) |
| |
| /* IO SHIFT / MACRO */ |
| #define BI_SHIFT 12 |
| #define BO_SHIFT 8 |
| #define AI_SHIFT 4 |
| #define AO_SHIFT 0 |
| #define AB_IO(param, shift) (param << shift) |
| |
| /* SOFT_RST */ |
| #define PBSR (1 << 12) /* Port B Software Reset */ |
| #define PASR (1 << 8) /* Port A Software Reset */ |
| #define IR (1 << 4) /* Interrupt Reset */ |
| #define FSISR (1 << 0) /* Software Reset */ |
| |
| /* OUT_SEL (FSI2) */ |
| #define DMMD (1 << 4) /* SPDIF output timing 0: Biphase only */ |
| /* 1: Biphase and serial */ |
| |
| /* FIFO_SZ */ |
| #define FIFO_SZ_MASK 0x7 |
| |
| #define FSI_RATES SNDRV_PCM_RATE_8000_96000 |
| |
| #define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE) |
| |
| /* |
| * bus options |
| * |
| * 0x000000BA |
| * |
| * A : sample widtht 16bit setting |
| * B : sample widtht 24bit setting |
| */ |
| |
| #define SHIFT_16DATA 0 |
| #define SHIFT_24DATA 4 |
| |
| #define PACKAGE_24BITBUS_BACK 0 |
| #define PACKAGE_24BITBUS_FRONT 1 |
| #define PACKAGE_16BITBUS_STREAM 2 |
| |
| #define BUSOP_SET(s, a) ((a) << SHIFT_ ## s ## DATA) |
| #define BUSOP_GET(s, a) (((a) >> SHIFT_ ## s ## DATA) & 0xF) |
| |
| /* |
| * FSI driver use below type name for variable |
| * |
| * xxx_num : number of data |
| * xxx_pos : position of data |
| * xxx_capa : capacity of data |
| */ |
| |
| /* |
| * period/frame/sample image |
| * |
| * ex) PCM (2ch) |
| * |
| * period pos period pos |
| * [n] [n + 1] |
| * |<-------------------- period--------------------->| |
| * ==|============================================ ... =|== |
| * | | |
| * ||<----- frame ----->|<------ frame ----->| ... | |
| * |+--------------------+--------------------+- ... | |
| * ||[ sample ][ sample ]|[ sample ][ sample ]| ... | |
| * |+--------------------+--------------------+- ... | |
| * ==|============================================ ... =|== |
| */ |
| |
| /* |
| * FSI FIFO image |
| * |
| * | | |
| * | | |
| * | [ sample ] | |
| * | [ sample ] | |
| * | [ sample ] | |
| * | [ sample ] | |
| * --> go to codecs |
| */ |
| |
| /* |
| * FSI clock |
| * |
| * FSIxCLK [CPG] (ick) -------> | |
| * |-> FSI_DIV (div)-> FSI2 |
| * FSIxCK [external] (xck) ---> | |
| */ |
| |
| /* |
| * struct |
| */ |
| |
| struct fsi_stream_handler; |
| struct fsi_stream { |
| |
| /* |
| * these are initialized by fsi_stream_init() |
| */ |
| struct snd_pcm_substream *substream; |
| int fifo_sample_capa; /* sample capacity of FSI FIFO */ |
| int buff_sample_capa; /* sample capacity of ALSA buffer */ |
| int buff_sample_pos; /* sample position of ALSA buffer */ |
| int period_samples; /* sample number / 1 period */ |
| int period_pos; /* current period position */ |
| int sample_width; /* sample width */ |
| int uerr_num; |
| int oerr_num; |
| |
| /* |
| * bus options |
| */ |
| u32 bus_option; |
| |
| /* |
| * thse are initialized by fsi_handler_init() |
| */ |
| struct fsi_stream_handler *handler; |
| struct fsi_priv *priv; |
| |
| /* |
| * these are for DMAEngine |
| */ |
| struct dma_chan *chan; |
| int dma_id; |
| }; |
| |
| struct fsi_clk { |
| /* see [FSI clock] */ |
| struct clk *own; |
| struct clk *xck; |
| struct clk *ick; |
| struct clk *div; |
| int (*set_rate)(struct device *dev, |
| struct fsi_priv *fsi); |
| |
| unsigned long rate; |
| unsigned int count; |
| }; |
| |
| struct fsi_priv { |
| void __iomem *base; |
| struct fsi_master *master; |
| |
| struct fsi_stream playback; |
| struct fsi_stream capture; |
| |
| struct fsi_clk clock; |
| |
| u32 fmt; |
| |
| int chan_num:16; |
| unsigned int clk_master:1; |
| unsigned int clk_cpg:1; |
| unsigned int spdif:1; |
| unsigned int enable_stream:1; |
| unsigned int bit_clk_inv:1; |
| unsigned int lr_clk_inv:1; |
| }; |
| |
| struct fsi_stream_handler { |
| int (*init)(struct fsi_priv *fsi, struct fsi_stream *io); |
| int (*quit)(struct fsi_priv *fsi, struct fsi_stream *io); |
| int (*probe)(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev); |
| int (*transfer)(struct fsi_priv *fsi, struct fsi_stream *io); |
| int (*remove)(struct fsi_priv *fsi, struct fsi_stream *io); |
| int (*start_stop)(struct fsi_priv *fsi, struct fsi_stream *io, |
| int enable); |
| }; |
| #define fsi_stream_handler_call(io, func, args...) \ |
| (!(io) ? -ENODEV : \ |
| !((io)->handler->func) ? 0 : \ |
| (io)->handler->func(args)) |
| |
| struct fsi_core { |
| int ver; |
| |
| u32 int_st; |
| u32 iemsk; |
| u32 imsk; |
| u32 a_mclk; |
| u32 b_mclk; |
| }; |
| |
| struct fsi_master { |
| void __iomem *base; |
| struct fsi_priv fsia; |
| struct fsi_priv fsib; |
| const struct fsi_core *core; |
| spinlock_t lock; |
| }; |
| |
| static int fsi_stream_is_play(struct fsi_priv *fsi, struct fsi_stream *io); |
| |
| /* |
| * basic read write function |
| */ |
| |
| static void __fsi_reg_write(u32 __iomem *reg, u32 data) |
| { |
| /* valid data area is 24bit */ |
| data &= 0x00ffffff; |
| |
| __raw_writel(data, reg); |
| } |
| |
| static u32 __fsi_reg_read(u32 __iomem *reg) |
| { |
| return __raw_readl(reg); |
| } |
| |
| static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data) |
| { |
| u32 val = __fsi_reg_read(reg); |
| |
| val &= ~mask; |
| val |= data & mask; |
| |
| __fsi_reg_write(reg, val); |
| } |
| |
| #define fsi_reg_write(p, r, d)\ |
| __fsi_reg_write((p->base + REG_##r), d) |
| |
| #define fsi_reg_read(p, r)\ |
| __fsi_reg_read((p->base + REG_##r)) |
| |
| #define fsi_reg_mask_set(p, r, m, d)\ |
| __fsi_reg_mask_set((p->base + REG_##r), m, d) |
| |
| #define fsi_master_read(p, r) _fsi_master_read(p, MST_##r) |
| #define fsi_core_read(p, r) _fsi_master_read(p, p->core->r) |
| static u32 _fsi_master_read(struct fsi_master *master, u32 reg) |
| { |
| u32 ret; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&master->lock, flags); |
| ret = __fsi_reg_read(master->base + reg); |
| spin_unlock_irqrestore(&master->lock, flags); |
| |
| return ret; |
| } |
| |
| #define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d) |
| #define fsi_core_mask_set(p, r, m, d) _fsi_master_mask_set(p, p->core->r, m, d) |
| static void _fsi_master_mask_set(struct fsi_master *master, |
| u32 reg, u32 mask, u32 data) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&master->lock, flags); |
| __fsi_reg_mask_set(master->base + reg, mask, data); |
| spin_unlock_irqrestore(&master->lock, flags); |
| } |
| |
| /* |
| * basic function |
| */ |
| static int fsi_version(struct fsi_master *master) |
| { |
| return master->core->ver; |
| } |
| |
| static struct fsi_master *fsi_get_master(struct fsi_priv *fsi) |
| { |
| return fsi->master; |
| } |
| |
| static int fsi_is_clk_master(struct fsi_priv *fsi) |
| { |
| return fsi->clk_master; |
| } |
| |
| static int fsi_is_port_a(struct fsi_priv *fsi) |
| { |
| return fsi->master->base == fsi->base; |
| } |
| |
| static int fsi_is_spdif(struct fsi_priv *fsi) |
| { |
| return fsi->spdif; |
| } |
| |
| static int fsi_is_enable_stream(struct fsi_priv *fsi) |
| { |
| return fsi->enable_stream; |
| } |
| |
| static int fsi_is_play(struct snd_pcm_substream *substream) |
| { |
| return substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| } |
| |
| static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| |
| return rtd->cpu_dai; |
| } |
| |
| static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai) |
| { |
| struct fsi_master *master = snd_soc_dai_get_drvdata(dai); |
| |
| if (dai->id == 0) |
| return &master->fsia; |
| else |
| return &master->fsib; |
| } |
| |
| static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream) |
| { |
| return fsi_get_priv_frm_dai(fsi_get_dai(substream)); |
| } |
| |
| static u32 fsi_get_port_shift(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| int is_play = fsi_stream_is_play(fsi, io); |
| int is_porta = fsi_is_port_a(fsi); |
| u32 shift; |
| |
| if (is_porta) |
| shift = is_play ? AO_SHIFT : AI_SHIFT; |
| else |
| shift = is_play ? BO_SHIFT : BI_SHIFT; |
| |
| return shift; |
| } |
| |
| static int fsi_frame2sample(struct fsi_priv *fsi, int frames) |
| { |
| return frames * fsi->chan_num; |
| } |
| |
| static int fsi_sample2frame(struct fsi_priv *fsi, int samples) |
| { |
| return samples / fsi->chan_num; |
| } |
| |
| static int fsi_get_current_fifo_samples(struct fsi_priv *fsi, |
| struct fsi_stream *io) |
| { |
| int is_play = fsi_stream_is_play(fsi, io); |
| u32 status; |
| int frames; |
| |
| status = is_play ? |
| fsi_reg_read(fsi, DOFF_ST) : |
| fsi_reg_read(fsi, DIFF_ST); |
| |
| frames = 0x1ff & (status >> 8); |
| |
| return fsi_frame2sample(fsi, frames); |
| } |
| |
| static void fsi_count_fifo_err(struct fsi_priv *fsi) |
| { |
| u32 ostatus = fsi_reg_read(fsi, DOFF_ST); |
| u32 istatus = fsi_reg_read(fsi, DIFF_ST); |
| |
| if (ostatus & ERR_OVER) |
| fsi->playback.oerr_num++; |
| |
| if (ostatus & ERR_UNDER) |
| fsi->playback.uerr_num++; |
| |
| if (istatus & ERR_OVER) |
| fsi->capture.oerr_num++; |
| |
| if (istatus & ERR_UNDER) |
| fsi->capture.uerr_num++; |
| |
| fsi_reg_write(fsi, DOFF_ST, 0); |
| fsi_reg_write(fsi, DIFF_ST, 0); |
| } |
| |
| /* |
| * fsi_stream_xx() function |
| */ |
| static inline int fsi_stream_is_play(struct fsi_priv *fsi, |
| struct fsi_stream *io) |
| { |
| return &fsi->playback == io; |
| } |
| |
| static inline struct fsi_stream *fsi_stream_get(struct fsi_priv *fsi, |
| struct snd_pcm_substream *substream) |
| { |
| return fsi_is_play(substream) ? &fsi->playback : &fsi->capture; |
| } |
| |
| static int fsi_stream_is_working(struct fsi_priv *fsi, |
| struct fsi_stream *io) |
| { |
| struct fsi_master *master = fsi_get_master(fsi); |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&master->lock, flags); |
| ret = !!(io->substream && io->substream->runtime); |
| spin_unlock_irqrestore(&master->lock, flags); |
| |
| return ret; |
| } |
| |
| static struct fsi_priv *fsi_stream_to_priv(struct fsi_stream *io) |
| { |
| return io->priv; |
| } |
| |
| static void fsi_stream_init(struct fsi_priv *fsi, |
| struct fsi_stream *io, |
| struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct fsi_master *master = fsi_get_master(fsi); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&master->lock, flags); |
| io->substream = substream; |
| io->buff_sample_capa = fsi_frame2sample(fsi, runtime->buffer_size); |
| io->buff_sample_pos = 0; |
| io->period_samples = fsi_frame2sample(fsi, runtime->period_size); |
| io->period_pos = 0; |
| io->sample_width = samples_to_bytes(runtime, 1); |
| io->bus_option = 0; |
| io->oerr_num = -1; /* ignore 1st err */ |
| io->uerr_num = -1; /* ignore 1st err */ |
| fsi_stream_handler_call(io, init, fsi, io); |
| spin_unlock_irqrestore(&master->lock, flags); |
| } |
| |
| static void fsi_stream_quit(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| struct snd_soc_dai *dai = fsi_get_dai(io->substream); |
| struct fsi_master *master = fsi_get_master(fsi); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&master->lock, flags); |
| |
| if (io->oerr_num > 0) |
| dev_err(dai->dev, "over_run = %d\n", io->oerr_num); |
| |
| if (io->uerr_num > 0) |
| dev_err(dai->dev, "under_run = %d\n", io->uerr_num); |
| |
| fsi_stream_handler_call(io, quit, fsi, io); |
| io->substream = NULL; |
| io->buff_sample_capa = 0; |
| io->buff_sample_pos = 0; |
| io->period_samples = 0; |
| io->period_pos = 0; |
| io->sample_width = 0; |
| io->bus_option = 0; |
| io->oerr_num = 0; |
| io->uerr_num = 0; |
| spin_unlock_irqrestore(&master->lock, flags); |
| } |
| |
| static int fsi_stream_transfer(struct fsi_stream *io) |
| { |
| struct fsi_priv *fsi = fsi_stream_to_priv(io); |
| if (!fsi) |
| return -EIO; |
| |
| return fsi_stream_handler_call(io, transfer, fsi, io); |
| } |
| |
| #define fsi_stream_start(fsi, io)\ |
| fsi_stream_handler_call(io, start_stop, fsi, io, 1) |
| |
| #define fsi_stream_stop(fsi, io)\ |
| fsi_stream_handler_call(io, start_stop, fsi, io, 0) |
| |
| static int fsi_stream_probe(struct fsi_priv *fsi, struct device *dev) |
| { |
| struct fsi_stream *io; |
| int ret1, ret2; |
| |
| io = &fsi->playback; |
| ret1 = fsi_stream_handler_call(io, probe, fsi, io, dev); |
| |
| io = &fsi->capture; |
| ret2 = fsi_stream_handler_call(io, probe, fsi, io, dev); |
| |
| if (ret1 < 0) |
| return ret1; |
| if (ret2 < 0) |
| return ret2; |
| |
| return 0; |
| } |
| |
| static int fsi_stream_remove(struct fsi_priv *fsi) |
| { |
| struct fsi_stream *io; |
| int ret1, ret2; |
| |
| io = &fsi->playback; |
| ret1 = fsi_stream_handler_call(io, remove, fsi, io); |
| |
| io = &fsi->capture; |
| ret2 = fsi_stream_handler_call(io, remove, fsi, io); |
| |
| if (ret1 < 0) |
| return ret1; |
| if (ret2 < 0) |
| return ret2; |
| |
| return 0; |
| } |
| |
| /* |
| * format/bus/dma setting |
| */ |
| static void fsi_format_bus_setup(struct fsi_priv *fsi, struct fsi_stream *io, |
| u32 bus, struct device *dev) |
| { |
| struct fsi_master *master = fsi_get_master(fsi); |
| int is_play = fsi_stream_is_play(fsi, io); |
| u32 fmt = fsi->fmt; |
| |
| if (fsi_version(master) >= 2) { |
| u32 dma = 0; |
| |
| /* |
| * FSI2 needs DMA/Bus setting |
| */ |
| switch (bus) { |
| case PACKAGE_24BITBUS_FRONT: |
| fmt |= CR_BWS_24; |
| dma |= VDMD_FRONT; |
| dev_dbg(dev, "24bit bus / package in front\n"); |
| break; |
| case PACKAGE_16BITBUS_STREAM: |
| fmt |= CR_BWS_16; |
| dma |= VDMD_STREAM; |
| dev_dbg(dev, "16bit bus / stream mode\n"); |
| break; |
| case PACKAGE_24BITBUS_BACK: |
| default: |
| fmt |= CR_BWS_24; |
| dma |= VDMD_BACK; |
| dev_dbg(dev, "24bit bus / package in back\n"); |
| break; |
| } |
| |
| if (is_play) |
| fsi_reg_write(fsi, OUT_DMAC, dma); |
| else |
| fsi_reg_write(fsi, IN_DMAC, dma); |
| } |
| |
| if (is_play) |
| fsi_reg_write(fsi, DO_FMT, fmt); |
| else |
| fsi_reg_write(fsi, DI_FMT, fmt); |
| } |
| |
| /* |
| * irq function |
| */ |
| |
| static void fsi_irq_enable(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| u32 data = AB_IO(1, fsi_get_port_shift(fsi, io)); |
| struct fsi_master *master = fsi_get_master(fsi); |
| |
| fsi_core_mask_set(master, imsk, data, data); |
| fsi_core_mask_set(master, iemsk, data, data); |
| } |
| |
| static void fsi_irq_disable(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| u32 data = AB_IO(1, fsi_get_port_shift(fsi, io)); |
| struct fsi_master *master = fsi_get_master(fsi); |
| |
| fsi_core_mask_set(master, imsk, data, 0); |
| fsi_core_mask_set(master, iemsk, data, 0); |
| } |
| |
| static u32 fsi_irq_get_status(struct fsi_master *master) |
| { |
| return fsi_core_read(master, int_st); |
| } |
| |
| static void fsi_irq_clear_status(struct fsi_priv *fsi) |
| { |
| u32 data = 0; |
| struct fsi_master *master = fsi_get_master(fsi); |
| |
| data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->playback)); |
| data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->capture)); |
| |
| /* clear interrupt factor */ |
| fsi_core_mask_set(master, int_st, data, 0); |
| } |
| |
| /* |
| * SPDIF master clock function |
| * |
| * These functions are used later FSI2 |
| */ |
| static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable) |
| { |
| struct fsi_master *master = fsi_get_master(fsi); |
| u32 mask, val; |
| |
| mask = BP | SE; |
| val = enable ? mask : 0; |
| |
| fsi_is_port_a(fsi) ? |
| fsi_core_mask_set(master, a_mclk, mask, val) : |
| fsi_core_mask_set(master, b_mclk, mask, val); |
| } |
| |
| /* |
| * clock function |
| */ |
| static int fsi_clk_init(struct device *dev, |
| struct fsi_priv *fsi, |
| int xck, |
| int ick, |
| int div, |
| int (*set_rate)(struct device *dev, |
| struct fsi_priv *fsi)) |
| { |
| struct fsi_clk *clock = &fsi->clock; |
| int is_porta = fsi_is_port_a(fsi); |
| |
| clock->xck = NULL; |
| clock->ick = NULL; |
| clock->div = NULL; |
| clock->rate = 0; |
| clock->count = 0; |
| clock->set_rate = set_rate; |
| |
| clock->own = devm_clk_get(dev, NULL); |
| if (IS_ERR(clock->own)) |
| return -EINVAL; |
| |
| /* external clock */ |
| if (xck) { |
| clock->xck = devm_clk_get(dev, is_porta ? "xcka" : "xckb"); |
| if (IS_ERR(clock->xck)) { |
| dev_err(dev, "can't get xck clock\n"); |
| return -EINVAL; |
| } |
| if (clock->xck == clock->own) { |
| dev_err(dev, "cpu doesn't support xck clock\n"); |
| return -EINVAL; |
| } |
| } |
| |
| /* FSIACLK/FSIBCLK */ |
| if (ick) { |
| clock->ick = devm_clk_get(dev, is_porta ? "icka" : "ickb"); |
| if (IS_ERR(clock->ick)) { |
| dev_err(dev, "can't get ick clock\n"); |
| return -EINVAL; |
| } |
| if (clock->ick == clock->own) { |
| dev_err(dev, "cpu doesn't support ick clock\n"); |
| return -EINVAL; |
| } |
| } |
| |
| /* FSI-DIV */ |
| if (div) { |
| clock->div = devm_clk_get(dev, is_porta ? "diva" : "divb"); |
| if (IS_ERR(clock->div)) { |
| dev_err(dev, "can't get div clock\n"); |
| return -EINVAL; |
| } |
| if (clock->div == clock->own) { |
| dev_err(dev, "cpu doens't support div clock\n"); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| #define fsi_clk_invalid(fsi) fsi_clk_valid(fsi, 0) |
| static void fsi_clk_valid(struct fsi_priv *fsi, unsigned long rate) |
| { |
| fsi->clock.rate = rate; |
| } |
| |
| static int fsi_clk_is_valid(struct fsi_priv *fsi) |
| { |
| return fsi->clock.set_rate && |
| fsi->clock.rate; |
| } |
| |
| static int fsi_clk_enable(struct device *dev, |
| struct fsi_priv *fsi) |
| { |
| struct fsi_clk *clock = &fsi->clock; |
| int ret = -EINVAL; |
| |
| if (!fsi_clk_is_valid(fsi)) |
| return ret; |
| |
| if (0 == clock->count) { |
| ret = clock->set_rate(dev, fsi); |
| if (ret < 0) { |
| fsi_clk_invalid(fsi); |
| return ret; |
| } |
| |
| if (clock->xck) |
| clk_enable(clock->xck); |
| if (clock->ick) |
| clk_enable(clock->ick); |
| if (clock->div) |
| clk_enable(clock->div); |
| |
| clock->count++; |
| } |
| |
| return ret; |
| } |
| |
| static int fsi_clk_disable(struct device *dev, |
| struct fsi_priv *fsi) |
| { |
| struct fsi_clk *clock = &fsi->clock; |
| |
| if (!fsi_clk_is_valid(fsi)) |
| return -EINVAL; |
| |
| if (1 == clock->count--) { |
| if (clock->xck) |
| clk_disable(clock->xck); |
| if (clock->ick) |
| clk_disable(clock->ick); |
| if (clock->div) |
| clk_disable(clock->div); |
| } |
| |
| return 0; |
| } |
| |
| static int fsi_clk_set_ackbpf(struct device *dev, |
| struct fsi_priv *fsi, |
| int ackmd, int bpfmd) |
| { |
| u32 data = 0; |
| |
| /* check ackmd/bpfmd relationship */ |
| if (bpfmd > ackmd) { |
| dev_err(dev, "unsupported rate (%d/%d)\n", ackmd, bpfmd); |
| return -EINVAL; |
| } |
| |
| /* ACKMD */ |
| switch (ackmd) { |
| case 512: |
| data |= (0x0 << 12); |
| break; |
| case 256: |
| data |= (0x1 << 12); |
| break; |
| case 128: |
| data |= (0x2 << 12); |
| break; |
| case 64: |
| data |= (0x3 << 12); |
| break; |
| case 32: |
| data |= (0x4 << 12); |
| break; |
| default: |
| dev_err(dev, "unsupported ackmd (%d)\n", ackmd); |
| return -EINVAL; |
| } |
| |
| /* BPFMD */ |
| switch (bpfmd) { |
| case 32: |
| data |= (0x0 << 8); |
| break; |
| case 64: |
| data |= (0x1 << 8); |
| break; |
| case 128: |
| data |= (0x2 << 8); |
| break; |
| case 256: |
| data |= (0x3 << 8); |
| break; |
| case 512: |
| data |= (0x4 << 8); |
| break; |
| case 16: |
| data |= (0x7 << 8); |
| break; |
| default: |
| dev_err(dev, "unsupported bpfmd (%d)\n", bpfmd); |
| return -EINVAL; |
| } |
| |
| dev_dbg(dev, "ACKMD/BPFMD = %d/%d\n", ackmd, bpfmd); |
| |
| fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data); |
| udelay(10); |
| |
| return 0; |
| } |
| |
| static int fsi_clk_set_rate_external(struct device *dev, |
| struct fsi_priv *fsi) |
| { |
| struct clk *xck = fsi->clock.xck; |
| struct clk *ick = fsi->clock.ick; |
| unsigned long rate = fsi->clock.rate; |
| unsigned long xrate; |
| int ackmd, bpfmd; |
| int ret = 0; |
| |
| /* check clock rate */ |
| xrate = clk_get_rate(xck); |
| if (xrate % rate) { |
| dev_err(dev, "unsupported clock rate\n"); |
| return -EINVAL; |
| } |
| |
| clk_set_parent(ick, xck); |
| clk_set_rate(ick, xrate); |
| |
| bpfmd = fsi->chan_num * 32; |
| ackmd = xrate / rate; |
| |
| dev_dbg(dev, "external/rate = %ld/%ld\n", xrate, rate); |
| |
| ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd); |
| if (ret < 0) |
| dev_err(dev, "%s failed", __func__); |
| |
| return ret; |
| } |
| |
| static int fsi_clk_set_rate_cpg(struct device *dev, |
| struct fsi_priv *fsi) |
| { |
| struct clk *ick = fsi->clock.ick; |
| struct clk *div = fsi->clock.div; |
| unsigned long rate = fsi->clock.rate; |
| unsigned long target = 0; /* 12288000 or 11289600 */ |
| unsigned long actual, cout; |
| unsigned long diff, min; |
| unsigned long best_cout, best_act; |
| int adj; |
| int ackmd, bpfmd; |
| int ret = -EINVAL; |
| |
| if (!(12288000 % rate)) |
| target = 12288000; |
| if (!(11289600 % rate)) |
| target = 11289600; |
| if (!target) { |
| dev_err(dev, "unsupported rate\n"); |
| return ret; |
| } |
| |
| bpfmd = fsi->chan_num * 32; |
| ackmd = target / rate; |
| ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd); |
| if (ret < 0) { |
| dev_err(dev, "%s failed", __func__); |
| return ret; |
| } |
| |
| /* |
| * The clock flow is |
| * |
| * [CPG] = cout => [FSI_DIV] = audio => [FSI] => [codec] |
| * |
| * But, it needs to find best match of CPG and FSI_DIV |
| * combination, since it is difficult to generate correct |
| * frequency of audio clock from ick clock only. |
| * Because ick is created from its parent clock. |
| * |
| * target = rate x [512/256/128/64]fs |
| * cout = round(target x adjustment) |
| * actual = cout / adjustment (by FSI-DIV) ~= target |
| * audio = actual |
| */ |
| min = ~0; |
| best_cout = 0; |
| best_act = 0; |
| for (adj = 1; adj < 0xffff; adj++) { |
| |
| cout = target * adj; |
| if (cout > 100000000) /* max clock = 100MHz */ |
| break; |
| |
| /* cout/actual audio clock */ |
| cout = clk_round_rate(ick, cout); |
| actual = cout / adj; |
| |
| /* find best frequency */ |
| diff = abs(actual - target); |
| if (diff < min) { |
| min = diff; |
| best_cout = cout; |
| best_act = actual; |
| } |
| } |
| |
| ret = clk_set_rate(ick, best_cout); |
| if (ret < 0) { |
| dev_err(dev, "ick clock failed\n"); |
| return -EIO; |
| } |
| |
| ret = clk_set_rate(div, clk_round_rate(div, best_act)); |
| if (ret < 0) { |
| dev_err(dev, "div clock failed\n"); |
| return -EIO; |
| } |
| |
| dev_dbg(dev, "ick/div = %ld/%ld\n", |
| clk_get_rate(ick), clk_get_rate(div)); |
| |
| return ret; |
| } |
| |
| static void fsi_pointer_update(struct fsi_stream *io, int size) |
| { |
| io->buff_sample_pos += size; |
| |
| if (io->buff_sample_pos >= |
| io->period_samples * (io->period_pos + 1)) { |
| struct snd_pcm_substream *substream = io->substream; |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| |
| io->period_pos++; |
| |
| if (io->period_pos >= runtime->periods) { |
| io->buff_sample_pos = 0; |
| io->period_pos = 0; |
| } |
| |
| snd_pcm_period_elapsed(substream); |
| } |
| } |
| |
| /* |
| * pio data transfer handler |
| */ |
| static void fsi_pio_push16(struct fsi_priv *fsi, u8 *_buf, int samples) |
| { |
| int i; |
| |
| if (fsi_is_enable_stream(fsi)) { |
| /* |
| * stream mode |
| * see |
| * fsi_pio_push_init() |
| */ |
| u32 *buf = (u32 *)_buf; |
| |
| for (i = 0; i < samples / 2; i++) |
| fsi_reg_write(fsi, DODT, buf[i]); |
| } else { |
| /* normal mode */ |
| u16 *buf = (u16 *)_buf; |
| |
| for (i = 0; i < samples; i++) |
| fsi_reg_write(fsi, DODT, ((u32)*(buf + i) << 8)); |
| } |
| } |
| |
| static void fsi_pio_pop16(struct fsi_priv *fsi, u8 *_buf, int samples) |
| { |
| u16 *buf = (u16 *)_buf; |
| int i; |
| |
| for (i = 0; i < samples; i++) |
| *(buf + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8); |
| } |
| |
| static void fsi_pio_push32(struct fsi_priv *fsi, u8 *_buf, int samples) |
| { |
| u32 *buf = (u32 *)_buf; |
| int i; |
| |
| for (i = 0; i < samples; i++) |
| fsi_reg_write(fsi, DODT, *(buf + i)); |
| } |
| |
| static void fsi_pio_pop32(struct fsi_priv *fsi, u8 *_buf, int samples) |
| { |
| u32 *buf = (u32 *)_buf; |
| int i; |
| |
| for (i = 0; i < samples; i++) |
| *(buf + i) = fsi_reg_read(fsi, DIDT); |
| } |
| |
| static u8 *fsi_pio_get_area(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| struct snd_pcm_runtime *runtime = io->substream->runtime; |
| |
| return runtime->dma_area + |
| samples_to_bytes(runtime, io->buff_sample_pos); |
| } |
| |
| static int fsi_pio_transfer(struct fsi_priv *fsi, struct fsi_stream *io, |
| void (*run16)(struct fsi_priv *fsi, u8 *buf, int samples), |
| void (*run32)(struct fsi_priv *fsi, u8 *buf, int samples), |
| int samples) |
| { |
| u8 *buf; |
| |
| if (!fsi_stream_is_working(fsi, io)) |
| return -EINVAL; |
| |
| buf = fsi_pio_get_area(fsi, io); |
| |
| switch (io->sample_width) { |
| case 2: |
| run16(fsi, buf, samples); |
| break; |
| case 4: |
| run32(fsi, buf, samples); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| fsi_pointer_update(io, samples); |
| |
| return 0; |
| } |
| |
| static int fsi_pio_pop(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| int sample_residues; /* samples in FSI fifo */ |
| int sample_space; /* ALSA free samples space */ |
| int samples; |
| |
| sample_residues = fsi_get_current_fifo_samples(fsi, io); |
| sample_space = io->buff_sample_capa - io->buff_sample_pos; |
| |
| samples = min(sample_residues, sample_space); |
| |
| return fsi_pio_transfer(fsi, io, |
| fsi_pio_pop16, |
| fsi_pio_pop32, |
| samples); |
| } |
| |
| static int fsi_pio_push(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| int sample_residues; /* ALSA residue samples */ |
| int sample_space; /* FSI fifo free samples space */ |
| int samples; |
| |
| sample_residues = io->buff_sample_capa - io->buff_sample_pos; |
| sample_space = io->fifo_sample_capa - |
| fsi_get_current_fifo_samples(fsi, io); |
| |
| samples = min(sample_residues, sample_space); |
| |
| return fsi_pio_transfer(fsi, io, |
| fsi_pio_push16, |
| fsi_pio_push32, |
| samples); |
| } |
| |
| static int fsi_pio_start_stop(struct fsi_priv *fsi, struct fsi_stream *io, |
| int enable) |
| { |
| struct fsi_master *master = fsi_get_master(fsi); |
| u32 clk = fsi_is_port_a(fsi) ? CRA : CRB; |
| |
| if (enable) |
| fsi_irq_enable(fsi, io); |
| else |
| fsi_irq_disable(fsi, io); |
| |
| if (fsi_is_clk_master(fsi)) |
| fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0); |
| |
| return 0; |
| } |
| |
| static int fsi_pio_push_init(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| /* |
| * we can use 16bit stream mode |
| * when "playback" and "16bit data" |
| * and platform allows "stream mode" |
| * see |
| * fsi_pio_push16() |
| */ |
| if (fsi_is_enable_stream(fsi)) |
| io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) | |
| BUSOP_SET(16, PACKAGE_16BITBUS_STREAM); |
| else |
| io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) | |
| BUSOP_SET(16, PACKAGE_24BITBUS_BACK); |
| return 0; |
| } |
| |
| static int fsi_pio_pop_init(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| /* |
| * always 24bit bus, package back when "capture" |
| */ |
| io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) | |
| BUSOP_SET(16, PACKAGE_24BITBUS_BACK); |
| return 0; |
| } |
| |
| static struct fsi_stream_handler fsi_pio_push_handler = { |
| .init = fsi_pio_push_init, |
| .transfer = fsi_pio_push, |
| .start_stop = fsi_pio_start_stop, |
| }; |
| |
| static struct fsi_stream_handler fsi_pio_pop_handler = { |
| .init = fsi_pio_pop_init, |
| .transfer = fsi_pio_pop, |
| .start_stop = fsi_pio_start_stop, |
| }; |
| |
| static irqreturn_t fsi_interrupt(int irq, void *data) |
| { |
| struct fsi_master *master = data; |
| u32 int_st = fsi_irq_get_status(master); |
| |
| /* clear irq status */ |
| fsi_master_mask_set(master, SOFT_RST, IR, 0); |
| fsi_master_mask_set(master, SOFT_RST, IR, IR); |
| |
| if (int_st & AB_IO(1, AO_SHIFT)) |
| fsi_stream_transfer(&master->fsia.playback); |
| if (int_st & AB_IO(1, BO_SHIFT)) |
| fsi_stream_transfer(&master->fsib.playback); |
| if (int_st & AB_IO(1, AI_SHIFT)) |
| fsi_stream_transfer(&master->fsia.capture); |
| if (int_st & AB_IO(1, BI_SHIFT)) |
| fsi_stream_transfer(&master->fsib.capture); |
| |
| fsi_count_fifo_err(&master->fsia); |
| fsi_count_fifo_err(&master->fsib); |
| |
| fsi_irq_clear_status(&master->fsia); |
| fsi_irq_clear_status(&master->fsib); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * dma data transfer handler |
| */ |
| static int fsi_dma_init(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| /* |
| * 24bit data : 24bit bus / package in back |
| * 16bit data : 16bit bus / stream mode |
| */ |
| io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) | |
| BUSOP_SET(16, PACKAGE_16BITBUS_STREAM); |
| |
| return 0; |
| } |
| |
| static void fsi_dma_complete(void *data) |
| { |
| struct fsi_stream *io = (struct fsi_stream *)data; |
| struct fsi_priv *fsi = fsi_stream_to_priv(io); |
| |
| fsi_pointer_update(io, io->period_samples); |
| |
| fsi_count_fifo_err(fsi); |
| } |
| |
| static int fsi_dma_transfer(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| struct snd_soc_dai *dai = fsi_get_dai(io->substream); |
| struct snd_pcm_substream *substream = io->substream; |
| struct dma_async_tx_descriptor *desc; |
| int is_play = fsi_stream_is_play(fsi, io); |
| enum dma_data_direction dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
| int ret = -EIO; |
| |
| desc = dmaengine_prep_dma_cyclic(io->chan, |
| substream->runtime->dma_addr, |
| snd_pcm_lib_buffer_bytes(substream), |
| snd_pcm_lib_period_bytes(substream), |
| dir, |
| DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
| if (!desc) { |
| dev_err(dai->dev, "dmaengine_prep_dma_cyclic() fail\n"); |
| goto fsi_dma_transfer_err; |
| } |
| |
| desc->callback = fsi_dma_complete; |
| desc->callback_param = io; |
| |
| if (dmaengine_submit(desc) < 0) { |
| dev_err(dai->dev, "tx_submit() fail\n"); |
| goto fsi_dma_transfer_err; |
| } |
| |
| dma_async_issue_pending(io->chan); |
| |
| /* |
| * FIXME |
| * |
| * In DMAEngine case, codec and FSI cannot be started simultaneously |
| * since FSI is using the scheduler work queue. |
| * Therefore, in capture case, probably FSI FIFO will have got |
| * overflow error in this point. |
| * in that case, DMA cannot start transfer until error was cleared. |
| */ |
| if (!is_play) { |
| if (ERR_OVER & fsi_reg_read(fsi, DIFF_ST)) { |
| fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR); |
| fsi_reg_write(fsi, DIFF_ST, 0); |
| } |
| } |
| |
| ret = 0; |
| |
| fsi_dma_transfer_err: |
| return ret; |
| } |
| |
| static int fsi_dma_push_start_stop(struct fsi_priv *fsi, struct fsi_stream *io, |
| int start) |
| { |
| struct fsi_master *master = fsi_get_master(fsi); |
| u32 clk = fsi_is_port_a(fsi) ? CRA : CRB; |
| u32 enable = start ? DMA_ON : 0; |
| |
| fsi_reg_mask_set(fsi, OUT_DMAC, DMA_ON, enable); |
| |
| dmaengine_terminate_all(io->chan); |
| |
| if (fsi_is_clk_master(fsi)) |
| fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0); |
| |
| return 0; |
| } |
| |
| static int fsi_dma_probe(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev) |
| { |
| dma_cap_mask_t mask; |
| int is_play = fsi_stream_is_play(fsi, io); |
| |
| dma_cap_zero(mask); |
| dma_cap_set(DMA_SLAVE, mask); |
| |
| io->chan = dma_request_slave_channel_compat(mask, |
| shdma_chan_filter, (void *)io->dma_id, |
| dev, is_play ? "tx" : "rx"); |
| if (io->chan) { |
| struct dma_slave_config cfg; |
| int ret; |
| |
| cfg.slave_id = io->dma_id; |
| cfg.dst_addr = 0; /* use default addr */ |
| cfg.src_addr = 0; /* use default addr */ |
| cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; |
| |
| ret = dmaengine_slave_config(io->chan, &cfg); |
| if (ret < 0) { |
| dma_release_channel(io->chan); |
| io->chan = NULL; |
| } |
| } |
| |
| if (!io->chan) { |
| |
| /* switch to PIO handler */ |
| if (is_play) |
| fsi->playback.handler = &fsi_pio_push_handler; |
| else |
| fsi->capture.handler = &fsi_pio_pop_handler; |
| |
| dev_info(dev, "switch handler (dma => pio)\n"); |
| |
| /* probe again */ |
| return fsi_stream_probe(fsi, dev); |
| } |
| |
| return 0; |
| } |
| |
| static int fsi_dma_remove(struct fsi_priv *fsi, struct fsi_stream *io) |
| { |
| fsi_stream_stop(fsi, io); |
| |
| if (io->chan) |
| dma_release_channel(io->chan); |
| |
| io->chan = NULL; |
| return 0; |
| } |
| |
| static struct fsi_stream_handler fsi_dma_push_handler = { |
| .init = fsi_dma_init, |
| .probe = fsi_dma_probe, |
| .transfer = fsi_dma_transfer, |
| .remove = fsi_dma_remove, |
| .start_stop = fsi_dma_push_start_stop, |
| }; |
| |
| /* |
| * dai ops |
| */ |
| static void fsi_fifo_init(struct fsi_priv *fsi, |
| struct fsi_stream *io, |
| struct device *dev) |
| { |
| struct fsi_master *master = fsi_get_master(fsi); |
| int is_play = fsi_stream_is_play(fsi, io); |
| u32 shift, i; |
| int frame_capa; |
| |
| /* get on-chip RAM capacity */ |
| shift = fsi_master_read(master, FIFO_SZ); |
| shift >>= fsi_get_port_shift(fsi, io); |
| shift &= FIFO_SZ_MASK; |
| frame_capa = 256 << shift; |
| dev_dbg(dev, "fifo = %d words\n", frame_capa); |
| |
| /* |
| * The maximum number of sample data varies depending |
| * on the number of channels selected for the format. |
| * |
| * FIFOs are used in 4-channel units in 3-channel mode |
| * and in 8-channel units in 5- to 7-channel mode |
| * meaning that more FIFOs than the required size of DPRAM |
| * are used. |
| * |
| * ex) if 256 words of DP-RAM is connected |
| * 1 channel: 256 (256 x 1 = 256) |
| * 2 channels: 128 (128 x 2 = 256) |
| * 3 channels: 64 ( 64 x 3 = 192) |
| * 4 channels: 64 ( 64 x 4 = 256) |
| * 5 channels: 32 ( 32 x 5 = 160) |
| * 6 channels: 32 ( 32 x 6 = 192) |
| * 7 channels: 32 ( 32 x 7 = 224) |
| * 8 channels: 32 ( 32 x 8 = 256) |
| */ |
| for (i = 1; i < fsi->chan_num; i <<= 1) |
| frame_capa >>= 1; |
| dev_dbg(dev, "%d channel %d store\n", |
| fsi->chan_num, frame_capa); |
| |
| io->fifo_sample_capa = fsi_frame2sample(fsi, frame_capa); |
| |
| /* |
| * set interrupt generation factor |
| * clear FIFO |
| */ |
| if (is_play) { |
| fsi_reg_write(fsi, DOFF_CTL, IRQ_HALF); |
| fsi_reg_mask_set(fsi, DOFF_CTL, FIFO_CLR, FIFO_CLR); |
| } else { |
| fsi_reg_write(fsi, DIFF_CTL, IRQ_HALF); |
| fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR); |
| } |
| } |
| |
| static int fsi_hw_startup(struct fsi_priv *fsi, |
| struct fsi_stream *io, |
| struct device *dev) |
| { |
| u32 data = 0; |
| |
| /* clock setting */ |
| if (fsi_is_clk_master(fsi)) |
| data = DIMD | DOMD; |
| |
| fsi_reg_mask_set(fsi, CKG1, (DIMD | DOMD), data); |
| |
| /* clock inversion (CKG2) */ |
| data = 0; |
| if (fsi->bit_clk_inv) |
| data |= (1 << 0); |
| if (fsi->lr_clk_inv) |
| data |= (1 << 4); |
| if (fsi_is_clk_master(fsi)) |
| data <<= 8; |
| fsi_reg_write(fsi, CKG2, data); |
| |
| /* spdif ? */ |
| if (fsi_is_spdif(fsi)) { |
| fsi_spdif_clk_ctrl(fsi, 1); |
| fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD); |
| } |
| |
| /* |
| * get bus settings |
| */ |
| data = 0; |
| switch (io->sample_width) { |
| case 2: |
| data = BUSOP_GET(16, io->bus_option); |
| break; |
| case 4: |
| data = BUSOP_GET(24, io->bus_option); |
| break; |
| } |
| fsi_format_bus_setup(fsi, io, data, dev); |
| |
| /* irq clear */ |
| fsi_irq_disable(fsi, io); |
| fsi_irq_clear_status(fsi); |
| |
| /* fifo init */ |
| fsi_fifo_init(fsi, io, dev); |
| |
| /* start master clock */ |
| if (fsi_is_clk_master(fsi)) |
| return fsi_clk_enable(dev, fsi); |
| |
| return 0; |
| } |
| |
| static int fsi_hw_shutdown(struct fsi_priv *fsi, |
| struct device *dev) |
| { |
| /* stop master clock */ |
| if (fsi_is_clk_master(fsi)) |
| return fsi_clk_disable(dev, fsi); |
| |
| return 0; |
| } |
| |
| static int fsi_dai_startup(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *dai) |
| { |
| struct fsi_priv *fsi = fsi_get_priv(substream); |
| |
| fsi_clk_invalid(fsi); |
| |
| return 0; |
| } |
| |
| static void fsi_dai_shutdown(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *dai) |
| { |
| struct fsi_priv *fsi = fsi_get_priv(substream); |
| |
| fsi_clk_invalid(fsi); |
| } |
| |
| static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd, |
| struct snd_soc_dai *dai) |
| { |
| struct fsi_priv *fsi = fsi_get_priv(substream); |
| struct fsi_stream *io = fsi_stream_get(fsi, substream); |
| int ret = 0; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| fsi_stream_init(fsi, io, substream); |
| if (!ret) |
| ret = fsi_hw_startup(fsi, io, dai->dev); |
| if (!ret) |
| ret = fsi_stream_start(fsi, io); |
| if (!ret) |
| ret = fsi_stream_transfer(io); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| if (!ret) |
| ret = fsi_hw_shutdown(fsi, dai->dev); |
| fsi_stream_stop(fsi, io); |
| fsi_stream_quit(fsi, io); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int fsi_set_fmt_dai(struct fsi_priv *fsi, unsigned int fmt) |
| { |
| switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| case SND_SOC_DAIFMT_I2S: |
| fsi->fmt = CR_I2S; |
| fsi->chan_num = 2; |
| break; |
| case SND_SOC_DAIFMT_LEFT_J: |
| fsi->fmt = CR_PCM; |
| fsi->chan_num = 2; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int fsi_set_fmt_spdif(struct fsi_priv *fsi) |
| { |
| struct fsi_master *master = fsi_get_master(fsi); |
| |
| if (fsi_version(master) < 2) |
| return -EINVAL; |
| |
| fsi->fmt = CR_DTMD_SPDIF_PCM | CR_PCM; |
| fsi->chan_num = 2; |
| |
| return 0; |
| } |
| |
| static int fsi_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
| { |
| struct fsi_priv *fsi = fsi_get_priv_frm_dai(dai); |
| int ret; |
| |
| /* set master/slave audio interface */ |
| switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| case SND_SOC_DAIFMT_CBM_CFM: |
| break; |
| case SND_SOC_DAIFMT_CBS_CFS: |
| fsi->clk_master = 1; /* codec is slave, cpu is master */ |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| /* set clock inversion */ |
| switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| case SND_SOC_DAIFMT_NB_IF: |
| fsi->bit_clk_inv = 0; |
| fsi->lr_clk_inv = 1; |
| break; |
| case SND_SOC_DAIFMT_IB_NF: |
| fsi->bit_clk_inv = 1; |
| fsi->lr_clk_inv = 0; |
| break; |
| case SND_SOC_DAIFMT_IB_IF: |
| fsi->bit_clk_inv = 1; |
| fsi->lr_clk_inv = 1; |
| break; |
| case SND_SOC_DAIFMT_NB_NF: |
| default: |
| fsi->bit_clk_inv = 0; |
| fsi->lr_clk_inv = 0; |
| break; |
| } |
| |
| if (fsi_is_clk_master(fsi)) { |
| if (fsi->clk_cpg) |
| fsi_clk_init(dai->dev, fsi, 0, 1, 1, |
| fsi_clk_set_rate_cpg); |
| else |
| fsi_clk_init(dai->dev, fsi, 1, 1, 0, |
| fsi_clk_set_rate_external); |
| } |
| |
| /* set format */ |
| if (fsi_is_spdif(fsi)) |
| ret = fsi_set_fmt_spdif(fsi); |
| else |
| ret = fsi_set_fmt_dai(fsi, fmt & SND_SOC_DAIFMT_FORMAT_MASK); |
| |
| return ret; |
| } |
| |
| static int fsi_dai_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params, |
| struct snd_soc_dai *dai) |
| { |
| struct fsi_priv *fsi = fsi_get_priv(substream); |
| |
| if (fsi_is_clk_master(fsi)) |
| fsi_clk_valid(fsi, params_rate(params)); |
| |
| return 0; |
| } |
| |
| static const struct snd_soc_dai_ops fsi_dai_ops = { |
| .startup = fsi_dai_startup, |
| .shutdown = fsi_dai_shutdown, |
| .trigger = fsi_dai_trigger, |
| .set_fmt = fsi_dai_set_fmt, |
| .hw_params = fsi_dai_hw_params, |
| }; |
| |
| /* |
| * pcm ops |
| */ |
| |
| static struct snd_pcm_hardware fsi_pcm_hardware = { |
| .info = SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_MMAP | |
| SNDRV_PCM_INFO_MMAP_VALID | |
| SNDRV_PCM_INFO_PAUSE, |
| .buffer_bytes_max = 64 * 1024, |
| .period_bytes_min = 32, |
| .period_bytes_max = 8192, |
| .periods_min = 1, |
| .periods_max = 32, |
| .fifo_size = 256, |
| }; |
| |
| static int fsi_pcm_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| int ret = 0; |
| |
| snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware); |
| |
| ret = snd_pcm_hw_constraint_integer(runtime, |
| SNDRV_PCM_HW_PARAM_PERIODS); |
| |
| return ret; |
| } |
| |
| static int fsi_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *hw_params) |
| { |
| return snd_pcm_lib_malloc_pages(substream, |
| params_buffer_bytes(hw_params)); |
| } |
| |
| static int fsi_hw_free(struct snd_pcm_substream *substream) |
| { |
| return snd_pcm_lib_free_pages(substream); |
| } |
| |
| static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream) |
| { |
| struct fsi_priv *fsi = fsi_get_priv(substream); |
| struct fsi_stream *io = fsi_stream_get(fsi, substream); |
| |
| return fsi_sample2frame(fsi, io->buff_sample_pos); |
| } |
| |
| static struct snd_pcm_ops fsi_pcm_ops = { |
| .open = fsi_pcm_open, |
| .ioctl = snd_pcm_lib_ioctl, |
| .hw_params = fsi_hw_params, |
| .hw_free = fsi_hw_free, |
| .pointer = fsi_pointer, |
| }; |
| |
| /* |
| * snd_soc_platform |
| */ |
| |
| #define PREALLOC_BUFFER (32 * 1024) |
| #define PREALLOC_BUFFER_MAX (32 * 1024) |
| |
| static void fsi_pcm_free(struct snd_pcm *pcm) |
| { |
| snd_pcm_lib_preallocate_free_for_all(pcm); |
| } |
| |
| static int fsi_pcm_new(struct snd_soc_pcm_runtime *rtd) |
| { |
| return snd_pcm_lib_preallocate_pages_for_all( |
| rtd->pcm, |
| SNDRV_DMA_TYPE_DEV, |
| rtd->card->snd_card->dev, |
| PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); |
| } |
| |
| /* |
| * alsa struct |
| */ |
| |
| static struct snd_soc_dai_driver fsi_soc_dai[] = { |
| { |
| .name = "fsia-dai", |
| .playback = { |
| .rates = FSI_RATES, |
| .formats = FSI_FMTS, |
| .channels_min = 2, |
| .channels_max = 2, |
| }, |
| .capture = { |
| .rates = FSI_RATES, |
| .formats = FSI_FMTS, |
| .channels_min = 2, |
| .channels_max = 2, |
| }, |
| .ops = &fsi_dai_ops, |
| }, |
| { |
| .name = "fsib-dai", |
| .playback = { |
| .rates = FSI_RATES, |
| .formats = FSI_FMTS, |
| .channels_min = 2, |
| .channels_max = 2, |
| }, |
| .capture = { |
| .rates = FSI_RATES, |
| .formats = FSI_FMTS, |
| .channels_min = 2, |
| .channels_max = 2, |
| }, |
| .ops = &fsi_dai_ops, |
| }, |
| }; |
| |
| static struct snd_soc_platform_driver fsi_soc_platform = { |
| .ops = &fsi_pcm_ops, |
| .pcm_new = fsi_pcm_new, |
| .pcm_free = fsi_pcm_free, |
| }; |
| |
| static const struct snd_soc_component_driver fsi_soc_component = { |
| .name = "fsi", |
| }; |
| |
| /* |
| * platform function |
| */ |
| static void fsi_of_parse(char *name, |
| struct device_node *np, |
| struct sh_fsi_port_info *info, |
| struct device *dev) |
| { |
| int i; |
| char prop[128]; |
| unsigned long flags = 0; |
| struct { |
| char *name; |
| unsigned int val; |
| } of_parse_property[] = { |
| { "spdif-connection", SH_FSI_FMT_SPDIF }, |
| { "stream-mode-support", SH_FSI_ENABLE_STREAM_MODE }, |
| { "use-internal-clock", SH_FSI_CLK_CPG }, |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(of_parse_property); i++) { |
| sprintf(prop, "%s,%s", name, of_parse_property[i].name); |
| if (of_get_property(np, prop, NULL)) |
| flags |= of_parse_property[i].val; |
| } |
| info->flags = flags; |
| |
| dev_dbg(dev, "%s flags : %lx\n", name, info->flags); |
| } |
| |
| static void fsi_port_info_init(struct fsi_priv *fsi, |
| struct sh_fsi_port_info *info) |
| { |
| if (info->flags & SH_FSI_FMT_SPDIF) |
| fsi->spdif = 1; |
| |
| if (info->flags & SH_FSI_CLK_CPG) |
| fsi->clk_cpg = 1; |
| |
| if (info->flags & SH_FSI_ENABLE_STREAM_MODE) |
| fsi->enable_stream = 1; |
| } |
| |
| static void fsi_handler_init(struct fsi_priv *fsi, |
| struct sh_fsi_port_info *info) |
| { |
| fsi->playback.handler = &fsi_pio_push_handler; /* default PIO */ |
| fsi->playback.priv = fsi; |
| fsi->capture.handler = &fsi_pio_pop_handler; /* default PIO */ |
| fsi->capture.priv = fsi; |
| |
| if (info->tx_id) { |
| fsi->playback.dma_id = info->tx_id; |
| fsi->playback.handler = &fsi_dma_push_handler; |
| } |
| } |
| |
| static struct of_device_id fsi_of_match[]; |
| static int fsi_probe(struct platform_device *pdev) |
| { |
| struct fsi_master *master; |
| struct device_node *np = pdev->dev.of_node; |
| struct sh_fsi_platform_info info; |
| const struct fsi_core *core; |
| struct fsi_priv *fsi; |
| struct resource *res; |
| unsigned int irq; |
| int ret; |
| |
| memset(&info, 0, sizeof(info)); |
| |
| core = NULL; |
| if (np) { |
| const struct of_device_id *of_id; |
| |
| of_id = of_match_device(fsi_of_match, &pdev->dev); |
| if (of_id) { |
| core = of_id->data; |
| fsi_of_parse("fsia", np, &info.port_a, &pdev->dev); |
| fsi_of_parse("fsib", np, &info.port_b, &pdev->dev); |
| } |
| } else { |
| const struct platform_device_id *id_entry = pdev->id_entry; |
| if (id_entry) |
| core = (struct fsi_core *)id_entry->driver_data; |
| |
| if (pdev->dev.platform_data) |
| memcpy(&info, pdev->dev.platform_data, sizeof(info)); |
| } |
| |
| if (!core) { |
| dev_err(&pdev->dev, "unknown fsi device\n"); |
| return -ENODEV; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| irq = platform_get_irq(pdev, 0); |
| if (!res || (int)irq <= 0) { |
| dev_err(&pdev->dev, "Not enough FSI platform resources.\n"); |
| return -ENODEV; |
| } |
| |
| master = devm_kzalloc(&pdev->dev, sizeof(*master), GFP_KERNEL); |
| if (!master) { |
| dev_err(&pdev->dev, "Could not allocate master\n"); |
| return -ENOMEM; |
| } |
| |
| master->base = devm_ioremap_nocache(&pdev->dev, |
| res->start, resource_size(res)); |
| if (!master->base) { |
| dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n"); |
| return -ENXIO; |
| } |
| |
| /* master setting */ |
| master->core = core; |
| spin_lock_init(&master->lock); |
| |
| /* FSI A setting */ |
| fsi = &master->fsia; |
| fsi->base = master->base; |
| fsi->master = master; |
| fsi_port_info_init(fsi, &info.port_a); |
| fsi_handler_init(fsi, &info.port_a); |
| ret = fsi_stream_probe(fsi, &pdev->dev); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "FSIA stream probe failed\n"); |
| return ret; |
| } |
| |
| /* FSI B setting */ |
| fsi = &master->fsib; |
| fsi->base = master->base + 0x40; |
| fsi->master = master; |
| fsi_port_info_init(fsi, &info.port_b); |
| fsi_handler_init(fsi, &info.port_b); |
| ret = fsi_stream_probe(fsi, &pdev->dev); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "FSIB stream probe failed\n"); |
| goto exit_fsia; |
| } |
| |
| pm_runtime_enable(&pdev->dev); |
| dev_set_drvdata(&pdev->dev, master); |
| |
| ret = devm_request_irq(&pdev->dev, irq, &fsi_interrupt, 0, |
| dev_name(&pdev->dev), master); |
| if (ret) { |
| dev_err(&pdev->dev, "irq request err\n"); |
| goto exit_fsib; |
| } |
| |
| ret = snd_soc_register_platform(&pdev->dev, &fsi_soc_platform); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "cannot snd soc register\n"); |
| goto exit_fsib; |
| } |
| |
| ret = snd_soc_register_component(&pdev->dev, &fsi_soc_component, |
| fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai)); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "cannot snd component register\n"); |
| goto exit_snd_soc; |
| } |
| |
| return ret; |
| |
| exit_snd_soc: |
| snd_soc_unregister_platform(&pdev->dev); |
| exit_fsib: |
| pm_runtime_disable(&pdev->dev); |
| fsi_stream_remove(&master->fsib); |
| exit_fsia: |
| fsi_stream_remove(&master->fsia); |
| |
| return ret; |
| } |
| |
| static int fsi_remove(struct platform_device *pdev) |
| { |
| struct fsi_master *master; |
| |
| master = dev_get_drvdata(&pdev->dev); |
| |
| pm_runtime_disable(&pdev->dev); |
| |
| snd_soc_unregister_component(&pdev->dev); |
| snd_soc_unregister_platform(&pdev->dev); |
| |
| fsi_stream_remove(&master->fsia); |
| fsi_stream_remove(&master->fsib); |
| |
| return 0; |
| } |
| |
| static void __fsi_suspend(struct fsi_priv *fsi, |
| struct fsi_stream *io, |
| struct device *dev) |
| { |
| if (!fsi_stream_is_working(fsi, io)) |
| return; |
| |
| fsi_stream_stop(fsi, io); |
| fsi_hw_shutdown(fsi, dev); |
| } |
| |
| static void __fsi_resume(struct fsi_priv *fsi, |
| struct fsi_stream *io, |
| struct device *dev) |
| { |
| if (!fsi_stream_is_working(fsi, io)) |
| return; |
| |
| fsi_hw_startup(fsi, io, dev); |
| fsi_stream_start(fsi, io); |
| } |
| |
| static int fsi_suspend(struct device *dev) |
| { |
| struct fsi_master *master = dev_get_drvdata(dev); |
| struct fsi_priv *fsia = &master->fsia; |
| struct fsi_priv *fsib = &master->fsib; |
| |
| __fsi_suspend(fsia, &fsia->playback, dev); |
| __fsi_suspend(fsia, &fsia->capture, dev); |
| |
| __fsi_suspend(fsib, &fsib->playback, dev); |
| __fsi_suspend(fsib, &fsib->capture, dev); |
| |
| return 0; |
| } |
| |
| static int fsi_resume(struct device *dev) |
| { |
| struct fsi_master *master = dev_get_drvdata(dev); |
| struct fsi_priv *fsia = &master->fsia; |
| struct fsi_priv *fsib = &master->fsib; |
| |
| __fsi_resume(fsia, &fsia->playback, dev); |
| __fsi_resume(fsia, &fsia->capture, dev); |
| |
| __fsi_resume(fsib, &fsib->playback, dev); |
| __fsi_resume(fsib, &fsib->capture, dev); |
| |
| return 0; |
| } |
| |
| static struct dev_pm_ops fsi_pm_ops = { |
| .suspend = fsi_suspend, |
| .resume = fsi_resume, |
| }; |
| |
| static struct fsi_core fsi1_core = { |
| .ver = 1, |
| |
| /* Interrupt */ |
| .int_st = INT_ST, |
| .iemsk = IEMSK, |
| .imsk = IMSK, |
| }; |
| |
| static struct fsi_core fsi2_core = { |
| .ver = 2, |
| |
| /* Interrupt */ |
| .int_st = CPU_INT_ST, |
| .iemsk = CPU_IEMSK, |
| .imsk = CPU_IMSK, |
| .a_mclk = A_MST_CTLR, |
| .b_mclk = B_MST_CTLR, |
| }; |
| |
| static struct of_device_id fsi_of_match[] = { |
| { .compatible = "renesas,sh_fsi", .data = &fsi1_core}, |
| { .compatible = "renesas,sh_fsi2", .data = &fsi2_core}, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, fsi_of_match); |
| |
| static struct platform_device_id fsi_id_table[] = { |
| { "sh_fsi", (kernel_ulong_t)&fsi1_core }, |
| { "sh_fsi2", (kernel_ulong_t)&fsi2_core }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(platform, fsi_id_table); |
| |
| static struct platform_driver fsi_driver = { |
| .driver = { |
| .name = "fsi-pcm-audio", |
| .pm = &fsi_pm_ops, |
| .of_match_table = fsi_of_match, |
| }, |
| .probe = fsi_probe, |
| .remove = fsi_remove, |
| .id_table = fsi_id_table, |
| }; |
| |
| module_platform_driver(fsi_driver); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("SuperH onchip FSI audio driver"); |
| MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>"); |
| MODULE_ALIAS("platform:fsi-pcm-audio"); |