2110 lines
46 KiB
C
2110 lines
46 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Fifo-attached Serial Interface (FSI) support for SH7724
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//
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// Copyright (C) 2009 Renesas Solutions Corp.
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// Kuninori Morimoto <morimoto.kuninori@renesas.com>
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//
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// Based on ssi.c
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// Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/pm_runtime.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/scatterlist.h>
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#include <linux/sh_dma.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/workqueue.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <sound/sh_fsi.h>
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/* PortA/PortB register */
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#define REG_DO_FMT 0x0000
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#define REG_DOFF_CTL 0x0004
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#define REG_DOFF_ST 0x0008
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#define REG_DI_FMT 0x000C
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#define REG_DIFF_CTL 0x0010
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#define REG_DIFF_ST 0x0014
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#define REG_CKG1 0x0018
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#define REG_CKG2 0x001C
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#define REG_DIDT 0x0020
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#define REG_DODT 0x0024
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#define REG_MUTE_ST 0x0028
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#define REG_OUT_DMAC 0x002C
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#define REG_OUT_SEL 0x0030
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#define REG_IN_DMAC 0x0038
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/* master register */
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#define MST_CLK_RST 0x0210
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#define MST_SOFT_RST 0x0214
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#define MST_FIFO_SZ 0x0218
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/* core register (depend on FSI version) */
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#define A_MST_CTLR 0x0180
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#define B_MST_CTLR 0x01A0
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#define CPU_INT_ST 0x01F4
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#define CPU_IEMSK 0x01F8
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#define CPU_IMSK 0x01FC
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#define INT_ST 0x0200
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#define IEMSK 0x0204
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#define IMSK 0x0208
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/* DO_FMT */
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/* DI_FMT */
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#define CR_BWS_MASK (0x3 << 20) /* FSI2 */
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#define CR_BWS_24 (0x0 << 20) /* FSI2 */
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#define CR_BWS_16 (0x1 << 20) /* FSI2 */
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#define CR_BWS_20 (0x2 << 20) /* FSI2 */
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#define CR_DTMD_PCM (0x0 << 8) /* FSI2 */
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#define CR_DTMD_SPDIF_PCM (0x1 << 8) /* FSI2 */
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#define CR_DTMD_SPDIF_STREAM (0x2 << 8) /* FSI2 */
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#define CR_MONO (0x0 << 4)
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#define CR_MONO_D (0x1 << 4)
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#define CR_PCM (0x2 << 4)
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#define CR_I2S (0x3 << 4)
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#define CR_TDM (0x4 << 4)
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#define CR_TDM_D (0x5 << 4)
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/* OUT_DMAC */
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/* IN_DMAC */
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#define VDMD_MASK (0x3 << 4)
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#define VDMD_FRONT (0x0 << 4) /* Package in front */
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#define VDMD_BACK (0x1 << 4) /* Package in back */
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#define VDMD_STREAM (0x2 << 4) /* Stream mode(16bit * 2) */
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#define DMA_ON (0x1 << 0)
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/* DOFF_CTL */
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/* DIFF_CTL */
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#define IRQ_HALF 0x00100000
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#define FIFO_CLR 0x00000001
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/* DOFF_ST */
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#define ERR_OVER 0x00000010
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#define ERR_UNDER 0x00000001
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#define ST_ERR (ERR_OVER | ERR_UNDER)
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/* CKG1 */
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#define ACKMD_MASK 0x00007000
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#define BPFMD_MASK 0x00000700
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#define DIMD (1 << 4)
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#define DOMD (1 << 0)
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/* A/B MST_CTLR */
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#define BP (1 << 4) /* Fix the signal of Biphase output */
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#define SE (1 << 0) /* Fix the master clock */
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/* CLK_RST */
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#define CRB (1 << 4)
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#define CRA (1 << 0)
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/* IO SHIFT / MACRO */
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#define BI_SHIFT 12
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#define BO_SHIFT 8
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#define AI_SHIFT 4
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#define AO_SHIFT 0
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#define AB_IO(param, shift) (param << shift)
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/* SOFT_RST */
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#define PBSR (1 << 12) /* Port B Software Reset */
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#define PASR (1 << 8) /* Port A Software Reset */
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#define IR (1 << 4) /* Interrupt Reset */
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#define FSISR (1 << 0) /* Software Reset */
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/* OUT_SEL (FSI2) */
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#define DMMD (1 << 4) /* SPDIF output timing 0: Biphase only */
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/* 1: Biphase and serial */
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/* FIFO_SZ */
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#define FIFO_SZ_MASK 0x7
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#define FSI_RATES SNDRV_PCM_RATE_8000_96000
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#define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
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/*
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* bus options
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*
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* 0x000000BA
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*
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* A : sample widtht 16bit setting
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* B : sample widtht 24bit setting
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*/
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#define SHIFT_16DATA 0
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#define SHIFT_24DATA 4
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#define PACKAGE_24BITBUS_BACK 0
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#define PACKAGE_24BITBUS_FRONT 1
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#define PACKAGE_16BITBUS_STREAM 2
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#define BUSOP_SET(s, a) ((a) << SHIFT_ ## s ## DATA)
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#define BUSOP_GET(s, a) (((a) >> SHIFT_ ## s ## DATA) & 0xF)
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/*
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* FSI driver use below type name for variable
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*
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* xxx_num : number of data
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* xxx_pos : position of data
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* xxx_capa : capacity of data
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*/
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/*
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* period/frame/sample image
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*
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* ex) PCM (2ch)
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*
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* period pos period pos
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* [n] [n + 1]
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* |<-------------------- period--------------------->|
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* ==|============================================ ... =|==
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* | |
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* ||<----- frame ----->|<------ frame ----->| ... |
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* |+--------------------+--------------------+- ... |
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* ||[ sample ][ sample ]|[ sample ][ sample ]| ... |
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* |+--------------------+--------------------+- ... |
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* ==|============================================ ... =|==
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*/
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/*
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* FSI FIFO image
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*
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* | |
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* | |
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* | [ sample ] |
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* | [ sample ] |
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* | [ sample ] |
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* | [ sample ] |
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* --> go to codecs
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*/
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/*
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* FSI clock
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*
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* FSIxCLK [CPG] (ick) -------> |
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* |-> FSI_DIV (div)-> FSI2
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* FSIxCK [external] (xck) ---> |
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*/
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/*
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* struct
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*/
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struct fsi_stream_handler;
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struct fsi_stream {
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/*
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* these are initialized by fsi_stream_init()
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*/
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struct snd_pcm_substream *substream;
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int fifo_sample_capa; /* sample capacity of FSI FIFO */
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int buff_sample_capa; /* sample capacity of ALSA buffer */
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int buff_sample_pos; /* sample position of ALSA buffer */
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int period_samples; /* sample number / 1 period */
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int period_pos; /* current period position */
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int sample_width; /* sample width */
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int uerr_num;
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int oerr_num;
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/*
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* bus options
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*/
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u32 bus_option;
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/*
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* thse are initialized by fsi_handler_init()
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*/
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struct fsi_stream_handler *handler;
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struct fsi_priv *priv;
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/*
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* these are for DMAEngine
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*/
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struct dma_chan *chan;
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int dma_id;
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};
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struct fsi_clk {
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/* see [FSI clock] */
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struct clk *own;
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struct clk *xck;
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struct clk *ick;
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struct clk *div;
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int (*set_rate)(struct device *dev,
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struct fsi_priv *fsi);
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unsigned long rate;
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unsigned int count;
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};
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struct fsi_priv {
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void __iomem *base;
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phys_addr_t phys;
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struct fsi_master *master;
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struct fsi_stream playback;
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struct fsi_stream capture;
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struct fsi_clk clock;
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u32 fmt;
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int chan_num:16;
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unsigned int clk_master:1;
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unsigned int clk_cpg:1;
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unsigned int spdif:1;
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unsigned int enable_stream:1;
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unsigned int bit_clk_inv:1;
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unsigned int lr_clk_inv:1;
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};
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struct fsi_stream_handler {
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int (*init)(struct fsi_priv *fsi, struct fsi_stream *io);
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int (*quit)(struct fsi_priv *fsi, struct fsi_stream *io);
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int (*probe)(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev);
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int (*transfer)(struct fsi_priv *fsi, struct fsi_stream *io);
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int (*remove)(struct fsi_priv *fsi, struct fsi_stream *io);
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int (*start_stop)(struct fsi_priv *fsi, struct fsi_stream *io,
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int enable);
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};
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#define fsi_stream_handler_call(io, func, args...) \
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(!(io) ? -ENODEV : \
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!((io)->handler->func) ? 0 : \
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(io)->handler->func(args))
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struct fsi_core {
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int ver;
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u32 int_st;
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u32 iemsk;
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u32 imsk;
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u32 a_mclk;
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u32 b_mclk;
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};
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struct fsi_master {
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void __iomem *base;
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struct fsi_priv fsia;
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struct fsi_priv fsib;
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const struct fsi_core *core;
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spinlock_t lock;
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};
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static inline int fsi_stream_is_play(struct fsi_priv *fsi,
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struct fsi_stream *io)
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{
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return &fsi->playback == io;
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}
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/*
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* basic read write function
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*/
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static void __fsi_reg_write(u32 __iomem *reg, u32 data)
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{
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/* valid data area is 24bit */
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data &= 0x00ffffff;
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__raw_writel(data, reg);
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}
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static u32 __fsi_reg_read(u32 __iomem *reg)
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{
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return __raw_readl(reg);
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}
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static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data)
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{
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u32 val = __fsi_reg_read(reg);
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val &= ~mask;
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val |= data & mask;
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__fsi_reg_write(reg, val);
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}
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#define fsi_reg_write(p, r, d)\
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__fsi_reg_write((p->base + REG_##r), d)
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#define fsi_reg_read(p, r)\
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__fsi_reg_read((p->base + REG_##r))
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#define fsi_reg_mask_set(p, r, m, d)\
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__fsi_reg_mask_set((p->base + REG_##r), m, d)
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#define fsi_master_read(p, r) _fsi_master_read(p, MST_##r)
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#define fsi_core_read(p, r) _fsi_master_read(p, p->core->r)
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static u32 _fsi_master_read(struct fsi_master *master, u32 reg)
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{
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u32 ret;
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unsigned long flags;
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spin_lock_irqsave(&master->lock, flags);
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ret = __fsi_reg_read(master->base + reg);
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spin_unlock_irqrestore(&master->lock, flags);
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return ret;
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}
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#define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d)
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#define fsi_core_mask_set(p, r, m, d) _fsi_master_mask_set(p, p->core->r, m, d)
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static void _fsi_master_mask_set(struct fsi_master *master,
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u32 reg, u32 mask, u32 data)
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{
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unsigned long flags;
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spin_lock_irqsave(&master->lock, flags);
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__fsi_reg_mask_set(master->base + reg, mask, data);
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spin_unlock_irqrestore(&master->lock, flags);
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}
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/*
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* basic function
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*/
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static int fsi_version(struct fsi_master *master)
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{
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return master->core->ver;
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}
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static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
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{
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return fsi->master;
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}
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static int fsi_is_clk_master(struct fsi_priv *fsi)
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{
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return fsi->clk_master;
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}
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static int fsi_is_port_a(struct fsi_priv *fsi)
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{
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return fsi->master->base == fsi->base;
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}
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static int fsi_is_spdif(struct fsi_priv *fsi)
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{
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return fsi->spdif;
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}
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static int fsi_is_enable_stream(struct fsi_priv *fsi)
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{
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return fsi->enable_stream;
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}
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static int fsi_is_play(struct snd_pcm_substream *substream)
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{
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return substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
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}
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static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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return rtd->cpu_dai;
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}
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static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai)
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{
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struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
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if (dai->id == 0)
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return &master->fsia;
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else
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return &master->fsib;
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}
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static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
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{
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return fsi_get_priv_frm_dai(fsi_get_dai(substream));
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}
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static u32 fsi_get_port_shift(struct fsi_priv *fsi, struct fsi_stream *io)
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{
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int is_play = fsi_stream_is_play(fsi, io);
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int is_porta = fsi_is_port_a(fsi);
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u32 shift;
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if (is_porta)
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shift = is_play ? AO_SHIFT : AI_SHIFT;
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else
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shift = is_play ? BO_SHIFT : BI_SHIFT;
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return shift;
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}
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static int fsi_frame2sample(struct fsi_priv *fsi, int frames)
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{
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return frames * fsi->chan_num;
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}
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static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
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{
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return samples / fsi->chan_num;
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}
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static int fsi_get_current_fifo_samples(struct fsi_priv *fsi,
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struct fsi_stream *io)
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{
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int is_play = fsi_stream_is_play(fsi, io);
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u32 status;
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int frames;
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status = is_play ?
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fsi_reg_read(fsi, DOFF_ST) :
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fsi_reg_read(fsi, DIFF_ST);
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frames = 0x1ff & (status >> 8);
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return fsi_frame2sample(fsi, frames);
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}
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static void fsi_count_fifo_err(struct fsi_priv *fsi)
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{
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u32 ostatus = fsi_reg_read(fsi, DOFF_ST);
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u32 istatus = fsi_reg_read(fsi, DIFF_ST);
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if (ostatus & ERR_OVER)
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fsi->playback.oerr_num++;
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if (ostatus & ERR_UNDER)
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fsi->playback.uerr_num++;
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if (istatus & ERR_OVER)
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fsi->capture.oerr_num++;
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if (istatus & ERR_UNDER)
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fsi->capture.uerr_num++;
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fsi_reg_write(fsi, DOFF_ST, 0);
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fsi_reg_write(fsi, DIFF_ST, 0);
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}
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/*
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* fsi_stream_xx() function
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*/
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static inline struct fsi_stream *fsi_stream_get(struct fsi_priv *fsi,
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struct snd_pcm_substream *substream)
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{
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return fsi_is_play(substream) ? &fsi->playback : &fsi->capture;
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}
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static int fsi_stream_is_working(struct fsi_priv *fsi,
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struct fsi_stream *io)
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{
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struct fsi_master *master = fsi_get_master(fsi);
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&master->lock, flags);
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ret = !!(io->substream && io->substream->runtime);
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spin_unlock_irqrestore(&master->lock, flags);
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return ret;
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}
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static struct fsi_priv *fsi_stream_to_priv(struct fsi_stream *io)
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{
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return io->priv;
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}
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static void fsi_stream_init(struct fsi_priv *fsi,
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struct fsi_stream *io,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct fsi_master *master = fsi_get_master(fsi);
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unsigned long flags;
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spin_lock_irqsave(&master->lock, flags);
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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;
|
|
}
|
|
|
|
clk_enable(clock->xck);
|
|
clk_enable(clock->ick);
|
|
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--) {
|
|
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_slave_channel(dev, is_play ? "tx" : "rx");
|
|
#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 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 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_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 const 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_component
|
|
*/
|
|
|
|
#define PREALLOC_BUFFER (32 * 1024)
|
|
#define PREALLOC_BUFFER_MAX (32 * 1024)
|
|
|
|
static int fsi_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
snd_pcm_lib_preallocate_pages_for_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",
|
|
.ops = &fsi_pcm_ops,
|
|
.pcm_new = 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_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 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_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->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 int 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);
|
|
|
|
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 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 = fsi_remove,
|
|
.id_table = fsi_id_table,
|
|
};
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module_platform_driver(fsi_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
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MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
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MODULE_ALIAS("platform:fsi-pcm-audio");
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