diff options
Diffstat (limited to 'sound/soc/sh/fsi.c')
| -rw-r--r-- | sound/soc/sh/fsi.c | 2119 |
1 files changed, 0 insertions, 2119 deletions
diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c deleted file mode 100644 index 84601ba43b7d..000000000000 --- a/sound/soc/sh/fsi.c +++ /dev/null @@ -1,2119 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// -// 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> - -#include <linux/delay.h> -#include <linux/dma-mapping.h> -#include <linux/pm_runtime.h> -#include <linux/io.h> -#include <linux/of.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; - - /* - * these 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; - phys_addr_t phys; - 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 inline int fsi_stream_is_play(struct fsi_priv *fsi, - struct fsi_stream *io) -{ - return &fsi->playback == 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 = snd_soc_substream_to_rtd(substream); - - return snd_soc_rtd_to_cpu(rtd, 0); -} - -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 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 doesn'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; - } - - ret = clk_enable(clock->xck); - if (ret) - goto err; - ret = clk_enable(clock->ick); - if (ret) - goto disable_xck; - ret = clk_enable(clock->div); - if (ret) - goto disable_ick; - - clock->count++; - } - - return ret; - -disable_ick: - clk_disable(clock->ick); -disable_xck: - clk_disable(clock->xck); -err: - 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--) { - clk_disable(clock->xck); - clk_disable(clock->ick); - 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_transfer_direction dir; - int ret = -EIO; - - if (is_play) - dir = DMA_MEM_TO_DEV; - else - dir = DMA_DEV_TO_MEM; - - 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) -{ - int is_play = fsi_stream_is_play(fsi, io); - -#ifdef CONFIG_SUPERH - dma_cap_mask_t mask; - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - io->chan = dma_request_channel(mask, shdma_chan_filter, - (void *)io->dma_id); -#else - io->chan = dma_request_chan(dev, is_play ? "tx" : "rx"); - if (IS_ERR(io->chan)) - io->chan = NULL; -#endif - if (io->chan) { - struct dma_slave_config cfg = {}; - int ret; - - if (is_play) { - cfg.dst_addr = fsi->phys + REG_DODT; - cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - cfg.direction = DMA_MEM_TO_DEV; - } else { - cfg.src_addr = fsi->phys + REG_DIDT; - cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - cfg.direction = 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 clock master audio interface */ - switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { - case SND_SOC_DAIFMT_BC_FC: - break; - case SND_SOC_DAIFMT_BP_FP: - fsi->clk_master = 1; /* 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; -} - -/* - * Select below from Sound Card, not auto - * SND_SOC_DAIFMT_CBC_CFC - * SND_SOC_DAIFMT_CBP_CFP - */ -static u64 fsi_dai_formats = - SND_SOC_POSSIBLE_DAIFMT_I2S | - SND_SOC_POSSIBLE_DAIFMT_LEFT_J | - SND_SOC_POSSIBLE_DAIFMT_NB_NF | - SND_SOC_POSSIBLE_DAIFMT_NB_IF | - SND_SOC_POSSIBLE_DAIFMT_IB_NF | - SND_SOC_POSSIBLE_DAIFMT_IB_IF; - -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, - .auto_selectable_formats = &fsi_dai_formats, - .num_auto_selectable_formats = 1, -}; - -/* - * pcm ops - */ - -static const struct snd_pcm_hardware fsi_pcm_hardware = { - .info = SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_MMAP_VALID, - .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_soc_component *component, - 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 snd_pcm_uframes_t fsi_pointer(struct snd_soc_component *component, - 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); -} - -/* - * snd_soc_component - */ - -#define PREALLOC_BUFFER (32 * 1024) -#define PREALLOC_BUFFER_MAX (32 * 1024) - -static int fsi_pcm_new(struct snd_soc_component *component, - struct snd_soc_pcm_runtime *rtd) -{ - snd_pcm_set_managed_buffer_all( - rtd->pcm, - SNDRV_DMA_TYPE_DEV, - rtd->card->snd_card->dev, - PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); - return 0; -} - -/* - * 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 const struct snd_soc_component_driver fsi_soc_component = { - .name = "fsi", - .open = fsi_pcm_open, - .pointer = fsi_pointer, - .pcm_construct = fsi_pcm_new, -}; - -/* - * 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_property_present(np, prop)) - 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 const struct fsi_core fsi1_core = { - .ver = 1, - - /* Interrupt */ - .int_st = INT_ST, - .iemsk = IEMSK, - .imsk = IMSK, -}; - -static const 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 const 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 const struct platform_device_id fsi_id_table[] = { - { "sh_fsi", (kernel_ulong_t)&fsi1_core }, - {}, -}; -MODULE_DEVICE_TABLE(platform, fsi_id_table); - -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) { - core = of_device_get_match_data(&pdev->dev); - 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) - return -ENOMEM; - - master->base = devm_ioremap(&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->phys = res->start; - 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->phys = res->start + 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 = devm_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_fsib; - } - - return ret; - -exit_fsib: - pm_runtime_disable(&pdev->dev); - fsi_stream_remove(&master->fsib); -exit_fsia: - fsi_stream_remove(&master->fsia); - - return ret; -} - -static void fsi_remove(struct platform_device *pdev) -{ - struct fsi_master *master; - - master = dev_get_drvdata(&pdev->dev); - - pm_runtime_disable(&pdev->dev); - - fsi_stream_remove(&master->fsia); - fsi_stream_remove(&master->fsib); -} - -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 const struct dev_pm_ops fsi_pm_ops = { - .suspend = fsi_suspend, - .resume = fsi_resume, -}; - -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_new = fsi_remove, - .id_table = fsi_id_table, -}; - -module_platform_driver(fsi_driver); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("SuperH onchip FSI audio driver"); -MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>"); -MODULE_ALIAS("platform:fsi-pcm-audio"); |