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

   1 /*
   2  *  linux/include/asm-arm/arch-pxa/hardware.h
   3  *
   4  *  Author:     Nicolas Pitre
   5  *  Created:    Jun 15, 2001
   6  *  Copyright:  MontaVista Software Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef __ASM_ARCH_HARDWARE_H
  14 #define __ASM_ARCH_HARDWARE_H
  15
  16 /*
  17  * We requires absolute addresses.
  18  */
  19 #define PCIO_BASE               0
  20
  21 /*
  22  * Workarounds for at least 2 errata so far require this.
  23  * The mapping is set in mach-pxa/generic.c.
  24  */
  25 #define UNCACHED_PHYS_0         0xff000000
  26 #define UNCACHED_ADDR           UNCACHED_PHYS_0
  27
  28 /*
  29  * Intel PXA2xx internal register mapping:
  30  *
  31  * 0x40000000 - 0x41ffffff <--> 0xf2000000 - 0xf3ffffff
  32  * 0x44000000 - 0x45ffffff <--> 0xf4000000 - 0xf5ffffff
  33  * 0x48000000 - 0x49ffffff <--> 0xf6000000 - 0xf7ffffff
  34  * 0x4c000000 - 0x4dffffff <--> 0xf8000000 - 0xf9ffffff
  35  * 0x50000000 - 0x51ffffff <--> 0xfa000000 - 0xfbffffff
  36  * 0x54000000 - 0x55ffffff <--> 0xfc000000 - 0xfdffffff
  37  * 0x58000000 - 0x59ffffff <--> 0xfe000000 - 0xffffffff
  38  *
  39  * Note that not all PXA2xx chips implement all those addresses, and the
  40  * kernel only maps the minimum needed range of this mapping.
  41  */
  42 #define io_p2v(x) (0xf2000000 + ((x) & 0x01ffffff) + (((x) & 0x1c000000) >> 1))
  43 #define io_v2p(x) (0x3c000000 + ((x) & 0x01ffffff) + (((x) & 0x0e000000) << 1))
  44
  45 #ifndef __ASSEMBLY__
  46
  47 #if 0
  48 # define __REG(x)       (*((volatile u32 *)io_p2v(x)))
  49 #else
  50 /*
  51  * This __REG() version gives the same results as the one above,  except
  52  * that we are fooling gcc somehow so it generates far better and smaller
  53  * assembly code for access to contigous registers.  It's a shame that gcc
  54  * doesn't guess this by itself.
  55  */
  56 #include <asm/types.h>
  57 typedef struct { volatile u32 offset[4096]; } __regbase;
  58 # define __REGP(x)      ((__regbase *)((x)&~4095))->offset[((x)&4095)>>2]
  59 # define __REG(x)       __REGP(io_p2v(x))
  60 #endif
  61
  62 /* With indexed regs we don't want to feed the index through io_p2v()
  63    especially if it is a variable, otherwise horrible code will result. */
  64 # define __REG2(x,y)     (*(volatile u32 *)((u32)&__REG(x) + (y)))
  65
  66 # define __PREG(x)      (io_v2p((u32)&(x)))
  67
  68 #else
  69
  70 # define __REG(x)       io_p2v(x)
  71 # define __PREG(x)      io_v2p(x)
  72
  73 #endif
  74
  75 #ifndef __ASSEMBLY__
  76
  77 /*
  78  * Handy routine to set GPIO alternate functions
  79  */
  80 extern void pxa_gpio_mode( int gpio_mode );
  81
  82 /*
  83  * Routine to enable or disable CKEN
  84  */
  85 extern void pxa_set_cken(int clock, int enable);
  86
  87 /*
  88  * return current memory and LCD clock frequency in units of 10kHz
  89  */
  90 extern unsigned int get_memclk_frequency_10khz(void);
  91 extern unsigned int get_lcdclk_frequency_10khz(void);
  92
  93 #endif
  94
  95 #endif  /* _ASM_ARCH_HARDWARE_H */