release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/plat-spear/include/plat/padmux.h

   1 /*
   2  * arch/arm/plat-spear/include/plat/padmux.h
   3  *
   4  * SPEAr platform specific gpio pads muxing file
   5  *
   6  * Copyright (C) 2009 ST Microelectronics
   7  * Viresh Kumar<viresh.kumar@st.com>
   8  *
   9  * This file is licensed under the terms of the GNU General Public
  10  * License version 2. This program is licensed "as is" without any
  11  * warranty of any kind, whether express or implied.
  12  */
  13
  14 #ifndef __PLAT_PADMUX_H
  15 #define __PLAT_PADMUX_H
  16
  17 #include <linux/types.h>
  18
  19 /*
  20  * struct pmx_reg: configuration structure for mode reg and mux reg
  21  *
  22  * offset: offset of mode reg
  23  * mask: mask of mode reg
  24  */
  25 struct pmx_reg {
  26         u32 offset;
  27         u32 mask;
  28 };
  29
  30 /*
  31  * struct pmx_dev_mode: configuration structure every group of modes of a device
  32  *
  33  * ids: all modes for this configuration
  34  * mask: mask for supported mode
  35  */
  36 struct pmx_dev_mode {
  37         u32 ids;
  38         u32 mask;
  39 };
  40
  41 /*
  42  * struct pmx_mode: mode definition structure
  43  *
  44  * name: mode name
  45  * mask: mode mask
  46  */
  47 struct pmx_mode {
  48         char *name;
  49         u32 id;
  50         u32 mask;
  51 };
  52
  53 /*
  54  * struct pmx_dev: device definition structure
  55  *
  56  * name: device name
  57  * modes: device configuration array for different modes supported
  58  * mode_count: size of modes array
  59  * is_active: is peripheral active/enabled
  60  * enb_on_reset: if 1, mask bits to be cleared in reg otherwise to be set in reg
  61  */
  62 struct pmx_dev {
  63         char *name;
  64         struct pmx_dev_mode *modes;
  65         u8 mode_count;
  66         bool is_active;
  67         bool enb_on_reset;
  68 };
  69
  70 /*
  71  * struct pmx_driver: driver definition structure
  72  *
  73  * mode: mode to be set
  74  * devs: array of pointer to pmx devices
  75  * devs_count: ARRAY_SIZE of devs
  76  * base: base address of soc config registers
  77  * mode_reg: structure of mode config register
  78  * mux_reg: structure of device mux config register
  79  */
  80 struct pmx_driver {
  81         struct pmx_mode *mode;
  82         struct pmx_dev **devs;
  83         u8 devs_count;
  84         u32 *base;
  85         struct pmx_reg mode_reg;
  86         struct pmx_reg mux_reg;
  87 };
  88
  89 /* pmx functions */
  90 int pmx_register(struct pmx_driver *driver);
  91
  92 #endif /* __PLAT_PADMUX_H */