android_kernel_xiaomi_sm8350/include/asm-arm/arch-pxa/ssp.h
eric miao 8828645046 [ARM] pxa: define "struct ssp_device" and add ssp_request()/ssp_free()
1. define "struct ssp_device" for SSP information, which is requested
   and released by function ssp_request()/ssp_free()

2. modify the ssp_init() and ssp_exit() to use the interface

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-26 15:07:51 +00:00

84 lines
1.9 KiB
C

/*
* 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>
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);
struct ssp_device *ssp_request(int port, const char *label);
void ssp_free(struct ssp_device *);
#endif /* __ASM_ARCH_SSP_H */