arch/arm/mach-pxa/include/mach/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 #include <linux/io.h>
  24
  25 enum pxa_ssp_type {
  26         SSP_UNDEFINED = 0,
  27         PXA25x_SSP,  /* pxa 210, 250, 255, 26x */
  28         PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
  29         PXA27x_SSP,
  30 };
  31
  32 struct ssp_device {
  33         struct platform_device *pdev;
  34         struct list_head        node;
  35
  36         struct clk      *clk;
  37         void __iomem    *mmio_base;
  38         unsigned long   phys_base;
  39
  40         const char      *label;
  41         int             port_id;
  42         int             type;
  43         int             use_count;
  44         int             irq;
  45         int             drcmr_rx;
  46         int             drcmr_tx;
  47 };
  48
  49 /**
  50  * ssp_write_reg - Write to a SSP register
  51  *
  52  * @dev: SSP device to access
  53  * @reg: Register to write to
  54  * @val: Value to be written.
  55  */
  56 static inline void ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val)
  57 {
  58         __raw_writel(val, dev->mmio_base + reg);
  59 }
  60
  61 /**
  62  * ssp_read_reg - Read from a SSP register
  63  *
  64  * @dev: SSP device to access
  65  * @reg: Register to read from
  66  */
  67 static inline u32 ssp_read_reg(struct ssp_device *dev, u32 reg)
  68 {
  69         return __raw_readl(dev->mmio_base + reg);
  70 }
  71
  72 struct ssp_device *ssp_request(int port, const char *label);
  73 void ssp_free(struct ssp_device *);
  74 #endif /* __ASM_ARCH_SSP_H */