include/asm-arm/arch-pxa/ssp.h

   1 /*
   2  *  ssp.h
   3  *
   4  *  Copyright (C) 2003 Russell King, All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This driver supports the following PXA CPU/SSP ports:-
  11  *
  12  *       PXA250     SSP
  13  *       PXA255     SSP, NSSP
  14  *       PXA26x     SSP, NSSP, ASSP
  15  *       PXA27x     SSP1, SSP2, SSP3
  16  *       PXA3xx     SSP1, SSP2, SSP3, SSP4
  17  */
  18
  19 #ifndef __ASM_ARCH_SSP_H
  20 #define __ASM_ARCH_SSP_H
  21
  22 #include <linux/list.h>
  23
  24 enum pxa_ssp_type {
  25         SSP_UNDEFINED = 0,
  26         PXA25x_SSP,  /* pxa 210, 250, 255, 26x */
  27         PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
  28         PXA27x_SSP,
  29 };
  30
  31 struct ssp_device {
  32         struct platform_device *pdev;
  33         struct list_head        node;
  34
  35         struct clk      *clk;
  36         void __iomem    *mmio_base;
  37         unsigned long   phys_base;
  38
  39         const char      *label;
  40         int             port_id;
  41         int             type;
  42         int             use_count;
  43         int             irq;
  44         int             drcmr_rx;
  45         int             drcmr_tx;
  46 };
  47
  48 /*
  49  * SSP initialisation flags
  50  */
  51 #define SSP_NO_IRQ      0x1             /* don't register an irq handler in SSP driver */
  52
  53 struct ssp_state {
  54         u32     cr0;
  55         u32 cr1;
  56         u32 to;
  57         u32 psp;
  58 };
  59
  60 struct ssp_dev {
  61         struct ssp_device *ssp;
  62         u32 port;
  63         u32 mode;
  64         u32 flags;
  65         u32 psp_flags;
  66         u32 speed;
  67         int irq;
  68 };
  69
  70 int ssp_write_word(struct ssp_dev *dev, u32 data);
  71 int ssp_read_word(struct ssp_dev *dev, u32 *data);
  72 int ssp_flush(struct ssp_dev *dev);
  73 void ssp_enable(struct ssp_dev *dev);
  74 void ssp_disable(struct ssp_dev *dev);
  75 void ssp_save_state(struct ssp_dev *dev, struct ssp_state *ssp);
  76 void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *ssp);
  77 int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags);
  78 int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed);
  79 void ssp_exit(struct ssp_dev *dev);
  80
  81 struct ssp_device *ssp_request(int port, const char *label);
  82 void ssp_free(struct ssp_device *);
  83 #endif /* __ASM_ARCH_SSP_H */