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/*
* arch/arm/plat-omap/include/mach/mcbsp.h
*
* Defines for Multi-Channel Buffered Serial Port
*
* Copyright (C) 2002 RidgeRun, Inc.
* Author: Steve Johnson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __ASM_ARCH_OMAP_MCBSP_H
#define __ASM_ARCH_OMAP_MCBSP_H
#include <linux/spinlock.h>
#include <linux/clk.h>
/* macro for building platform_device for McBSP ports */
#define OMAP_MCBSP_PLATFORM_DEVICE(port_nr) \
static struct platform_device omap_mcbsp##port_nr = { \
.name = "omap-mcbsp-dai", \
.id = port_nr - 1, \
}
#define MCBSP_CONFIG_TYPE2 0x2
#define MCBSP_CONFIG_TYPE3 0x3
#define MCBSP_CONFIG_TYPE4 0x4
/* CLKR signal muxing options */
#define CLKR_SRC_CLKR 0
#define CLKR_SRC_CLKX 1
/* FSR signal muxing options */
#define FSR_SRC_FSR 0
#define FSR_SRC_FSX 1
/* McBSP functional clock sources */
#define MCBSP_CLKS_PRCM_SRC 0
#define MCBSP_CLKS_PAD_SRC 1
/* Platform specific configuration */
struct omap_mcbsp_ops {
void (*request)(unsigned int);
void (*free)(unsigned int);
};
struct omap_mcbsp_platform_data {
struct omap_mcbsp_ops *ops;
u16 buffer_size;
u8 reg_size;
u8 reg_step;
/* McBSP platform and instance specific features */
bool has_wakeup; /* Wakeup capability */
bool has_ccr; /* Transceiver has configuration control registers */
int (*enable_st_clock)(unsigned int, bool);
int (*set_clk_src)(struct device *dev, struct clk *clk, const char *src);
int (*mux_signal)(struct device *dev, const char *signal, const char *src);
};
struct omap_mcbsp_st_data {
void __iomem *io_base_st;
bool running;
bool enabled;
s16 taps[128]; /* Sidetone filter coefficients */
int nr_taps; /* Number of filter coefficients in use */
s16 ch0gain;
s16 ch1gain;
};
struct omap_mcbsp {
struct device *dev;
unsigned long phys_base;
unsigned long phys_dma_base;
void __iomem *io_base;
u8 id;
u8 free;
int rx_irq;
int tx_irq;
/* DMA stuff */
u8 dma_rx_sync;
u8 dma_tx_sync;
/* Protect the field .free, while checking if the mcbsp is in use */
spinlock_t lock;
struct omap_mcbsp_platform_data *pdata;
struct clk *fclk;
struct omap_mcbsp_st_data *st_data;
int dma_op_mode;
u16 max_tx_thres;
u16 max_rx_thres;
void *reg_cache;
int reg_cache_size;
};
/**
* omap_mcbsp_dev_attr - OMAP McBSP device attributes for omap_hwmod
* @sidetone: name of the sidetone device
*/
struct omap_mcbsp_dev_attr {
const char *sidetone;
};
extern struct omap_mcbsp **mcbsp_ptr;
extern int omap_mcbsp_count;
#endif
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