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sound: ASoC: Blackfin: SPORT peripheral interface driver
SPORT is a serial port which can support serveral serial communication protocols. It can be used as I2C/PCM/AC97. For further information, please look up the HRM. [Additional coding standards fixes by Mark Brown.] Signed-off-by: Cliff Cai <cliff.cai@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
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Cliff Cai
Jaroslav Kysela
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/*
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* File: bf5xx_ac97_sport.h
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* Based on:
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* Author: Roy Huang <roy.huang@analog.com>
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*
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* Created:
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* Description:
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*
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* Copyright 2004-2007 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __BF5XX_SPORT_H__
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#define __BF5XX_SPORT_H__
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#include <linux/types.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include <asm/dma.h>
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struct sport_register {
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u16 tcr1; u16 reserved0;
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u16 tcr2; u16 reserved1;
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u16 tclkdiv; u16 reserved2;
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u16 tfsdiv; u16 reserved3;
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u32 tx;
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u32 reserved_l0;
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u32 rx;
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u32 reserved_l1;
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u16 rcr1; u16 reserved4;
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u16 rcr2; u16 reserved5;
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u16 rclkdiv; u16 reserved6;
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u16 rfsdiv; u16 reserved7;
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u16 stat; u16 reserved8;
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u16 chnl; u16 reserved9;
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u16 mcmc1; u16 reserved10;
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u16 mcmc2; u16 reserved11;
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u32 mtcs0;
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u32 mtcs1;
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u32 mtcs2;
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u32 mtcs3;
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u32 mrcs0;
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u32 mrcs1;
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u32 mrcs2;
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u32 mrcs3;
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};
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#define DESC_ELEMENT_COUNT 9
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struct sport_device {
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int dma_rx_chan;
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int dma_tx_chan;
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int err_irq;
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struct sport_register *regs;
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unsigned char *rx_buf;
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unsigned char *tx_buf;
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unsigned int rx_fragsize;
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unsigned int tx_fragsize;
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unsigned int rx_frags;
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unsigned int tx_frags;
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unsigned int wdsize;
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/* for dummy dma transfer */
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void *dummy_buf;
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unsigned int dummy_count;
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/* DMA descriptor ring head of current audio stream*/
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struct dmasg *dma_rx_desc;
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struct dmasg *dma_tx_desc;
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unsigned int rx_desc_bytes;
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unsigned int tx_desc_bytes;
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unsigned int rx_run:1; /* rx is running */
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unsigned int tx_run:1; /* tx is running */
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struct dmasg *dummy_rx_desc;
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struct dmasg *dummy_tx_desc;
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struct dmasg *curr_rx_desc;
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struct dmasg *curr_tx_desc;
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int rx_curr_frag;
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int tx_curr_frag;
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unsigned int rcr1;
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unsigned int rcr2;
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int rx_tdm_count;
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unsigned int tcr1;
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unsigned int tcr2;
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int tx_tdm_count;
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void (*rx_callback)(void *data);
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void *rx_data;
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void (*tx_callback)(void *data);
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void *tx_data;
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void (*err_callback)(void *data);
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void *err_data;
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unsigned char *tx_dma_buf;
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unsigned char *rx_dma_buf;
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#ifdef CONFIG_SND_MMAP_SUPPORT
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dma_addr_t tx_dma_phy;
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dma_addr_t rx_dma_phy;
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int tx_pos;/*pcm sample count*/
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int rx_pos;
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unsigned int tx_buffer_size;
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unsigned int rx_buffer_size;
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#endif
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void *private_data;
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};
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extern struct sport_device *sport_handle;
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struct sport_param {
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int dma_rx_chan;
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int dma_tx_chan;
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int err_irq;
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struct sport_register *regs;
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};
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struct sport_device *sport_init(struct sport_param *param, unsigned wdsize,
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unsigned dummy_count, void *private_data);
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void sport_done(struct sport_device *sport);
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/* first use these ...*/
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/* note: multichannel is in units of 8 channels, tdm_count is number of channels
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* NOT / 8 ! all channels are enabled by default */
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int sport_set_multichannel(struct sport_device *sport, int tdm_count,
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u32 mask, int packed);
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int sport_config_rx(struct sport_device *sport,
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unsigned int rcr1, unsigned int rcr2,
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unsigned int clkdiv, unsigned int fsdiv);
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int sport_config_tx(struct sport_device *sport,
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unsigned int tcr1, unsigned int tcr2,
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unsigned int clkdiv, unsigned int fsdiv);
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/* ... then these: */
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/* buffer size (in bytes) == fragcount * fragsize_bytes */
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/* this is not a very general api, it sets the dma to 2d autobuffer mode */
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int sport_config_rx_dma(struct sport_device *sport, void *buf,
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int fragcount, size_t fragsize_bytes);
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int sport_config_tx_dma(struct sport_device *sport, void *buf,
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int fragcount, size_t fragsize_bytes);
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int sport_tx_start(struct sport_device *sport);
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int sport_tx_stop(struct sport_device *sport);
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int sport_rx_start(struct sport_device *sport);
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int sport_rx_stop(struct sport_device *sport);
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/* for use in interrupt handler */
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unsigned long sport_curr_offset_rx(struct sport_device *sport);
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unsigned long sport_curr_offset_tx(struct sport_device *sport);
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void sport_incfrag(struct sport_device *sport, int *frag, int tx);
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void sport_decfrag(struct sport_device *sport, int *frag, int tx);
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int sport_set_rx_callback(struct sport_device *sport,
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void (*rx_callback)(void *), void *rx_data);
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int sport_set_tx_callback(struct sport_device *sport,
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void (*tx_callback)(void *), void *tx_data);
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int sport_set_err_callback(struct sport_device *sport,
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void (*err_callback)(void *), void *err_data);
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int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \
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u8 *in_data, int len);
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#endif /* BF53X_SPORT_H */
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