/*
* ssp.h
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This driver supports the following PXA CPU/SSP ports:-
*
* PXA250 SSP
* PXA255 SSP, NSSP
* PXA26x SSP, NSSP, ASSP
* PXA27x SSP1, SSP2, SSP3
* PXA3xx SSP1, SSP2, SSP3, SSP4
*/
#ifndef __ASM_ARCH_SSP_H
#define __ASM_ARCH_SSP_H
#include <linux/list.h>
#include <linux/io.h>
enum pxa_ssp_type {
SSP_UNDEFINED = 0,
PXA25x_SSP, /* pxa 210, 250, 255, 26x */
PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
PXA27x_SSP,
};
struct ssp_device {
struct platform_device *pdev;
struct list_head node;
struct clk *clk;
void __iomem *mmio_base;
unsigned long phys_base;
const char *label;
int port_id;
int type;
int use_count;
int irq;
int drcmr_rx;
int drcmr_tx;
};
/*
* SSP initialisation flags
*/
#define SSP_NO_IRQ 0x1 /* don't register an irq handler in SSP driver */
struct ssp_state {
u32 cr0;
u32 cr1;
u32 to;
u32 psp;
};
struct ssp_dev {
struct ssp_device *ssp;
u32 port;
u32 mode;
u32 flags;
u32 psp_flags;
u32 speed;
int irq;
};
int ssp_write_word(struct ssp_dev *dev, u32 data);
int ssp_read_word(struct ssp_dev *dev, u32 *data);
int ssp_flush(struct ssp_dev *dev);
void ssp_enable(struct ssp_dev *dev);
void ssp_disable(struct ssp_dev *dev);
void ssp_save_state(struct ssp_dev *dev, struct ssp_state *ssp);
void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *ssp);
int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags);
int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed);
void ssp_exit(struct ssp_dev *dev);
/**
* ssp_write_reg - Write to a SSP register
*
* @dev: SSP device to access
* @reg: Register to write to
* @val: Value to be written.
*/
static inline void ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val)
{
__raw_writel(val, dev->mmio_base + reg);
}
/**
* ssp_read_reg - Read from a SSP register
*
* @dev: SSP device to access
* @reg: Register to read from
*/
static inline u32 ssp_read_reg(struct ssp_device *dev, u32 reg)
{
return __raw_readl(dev->mmio_base + reg);
}
struct ssp_device *ssp_request(int port, const char *label);
void ssp_free(struct ssp_device *);
#endif /* __ASM_ARCH_SSP_H */
