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linux/include/asm-arm/arch-pxa/mfp.h
eric miao 7f7c8a6192 [ARM] pxa: make MFP configuration processor independent 
There are two reasons for making the MFP configuration to be processor
independent, i.e. removing the relationship of configuration bits with
actual MFPR register settings:

   1. power management sometimes requires the MFP to be configured
      differently when in run mode or in low power mode

   2. for future integration of pxa{25x,27x} GPIO configurations

The modifications include:

1. introducing of processor independent MFP configuration bits, as
   defined in [include/asm-arm/arch-pxa/mfp.h]:

	bit  0.. 9 - MFP Pin Number (1024 Pins Maximum)
	bit 10..12 - Alternate Function Selection
	bit 13..15 - Drive Strength
	bit 16..18 - Low Power Mode State
	bit 19..20 - Low Power Mode Edge Detection
	bit 21..22 - Run Mode Pull State
	and so on,

2. moving the processor dependent code from mfp.h into mfp-pxa3xx.h

3. cleaning up of the MFPR bit definitions

4. mapping of processor independent MFP configuration into processor
   specific MFPR register settings is now totally encapsulated within
   pxa3xx_mfp_config()

5. using of "unsigned long" instead of invented type of "mfp_cfg_t"
   according to Documentation/CodingStyle Chapter 5, usage of this
   in platform code will be slowly removed in later patches

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-26 15:07:56 +00:00

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/*
* linux/include/asm-arm/arch-pxa/mfp.h
*
* Multi-Function Pin Definitions
*
* Copyright (C) 2007 Marvell International Ltd.
*
* 2007-8-21: eric miao <eric.miao@marvell.com>
* initial version
*
* 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.
*/
#ifndef __ASM_ARCH_MFP_H
#define __ASM_ARCH_MFP_H
#define mfp_to_gpio(m) ((m) % 128)
/* list of all the configurable MFP pins */
enum {
MFP_PIN_INVALID = -1,
MFP_PIN_GPIO0 = 0,
MFP_PIN_GPIO1,
MFP_PIN_GPIO2,
MFP_PIN_GPIO3,
MFP_PIN_GPIO4,
MFP_PIN_GPIO5,
MFP_PIN_GPIO6,
MFP_PIN_GPIO7,
MFP_PIN_GPIO8,
MFP_PIN_GPIO9,
MFP_PIN_GPIO10,
MFP_PIN_GPIO11,
MFP_PIN_GPIO12,
MFP_PIN_GPIO13,
MFP_PIN_GPIO14,
MFP_PIN_GPIO15,
MFP_PIN_GPIO16,
MFP_PIN_GPIO17,
MFP_PIN_GPIO18,
MFP_PIN_GPIO19,
MFP_PIN_GPIO20,
MFP_PIN_GPIO21,
MFP_PIN_GPIO22,
MFP_PIN_GPIO23,
MFP_PIN_GPIO24,
MFP_PIN_GPIO25,
MFP_PIN_GPIO26,
MFP_PIN_GPIO27,
MFP_PIN_GPIO28,
MFP_PIN_GPIO29,
MFP_PIN_GPIO30,
MFP_PIN_GPIO31,
MFP_PIN_GPIO32,
MFP_PIN_GPIO33,
MFP_PIN_GPIO34,
MFP_PIN_GPIO35,
MFP_PIN_GPIO36,
MFP_PIN_GPIO37,
MFP_PIN_GPIO38,
MFP_PIN_GPIO39,
MFP_PIN_GPIO40,
MFP_PIN_GPIO41,
MFP_PIN_GPIO42,
MFP_PIN_GPIO43,
MFP_PIN_GPIO44,
MFP_PIN_GPIO45,
MFP_PIN_GPIO46,
MFP_PIN_GPIO47,
MFP_PIN_GPIO48,
MFP_PIN_GPIO49,
MFP_PIN_GPIO50,
MFP_PIN_GPIO51,
MFP_PIN_GPIO52,
MFP_PIN_GPIO53,
MFP_PIN_GPIO54,
MFP_PIN_GPIO55,
MFP_PIN_GPIO56,
MFP_PIN_GPIO57,
MFP_PIN_GPIO58,
MFP_PIN_GPIO59,
MFP_PIN_GPIO60,
MFP_PIN_GPIO61,
MFP_PIN_GPIO62,
MFP_PIN_GPIO63,
MFP_PIN_GPIO64,
MFP_PIN_GPIO65,
MFP_PIN_GPIO66,
MFP_PIN_GPIO67,
MFP_PIN_GPIO68,
MFP_PIN_GPIO69,
MFP_PIN_GPIO70,
MFP_PIN_GPIO71,
MFP_PIN_GPIO72,
MFP_PIN_GPIO73,
MFP_PIN_GPIO74,
MFP_PIN_GPIO75,
MFP_PIN_GPIO76,
MFP_PIN_GPIO77,
MFP_PIN_GPIO78,
MFP_PIN_GPIO79,
MFP_PIN_GPIO80,
MFP_PIN_GPIO81,
MFP_PIN_GPIO82,
MFP_PIN_GPIO83,
MFP_PIN_GPIO84,
MFP_PIN_GPIO85,
MFP_PIN_GPIO86,
MFP_PIN_GPIO87,
MFP_PIN_GPIO88,
MFP_PIN_GPIO89,
MFP_PIN_GPIO90,
MFP_PIN_GPIO91,
MFP_PIN_GPIO92,
MFP_PIN_GPIO93,
MFP_PIN_GPIO94,
MFP_PIN_GPIO95,
MFP_PIN_GPIO96,
MFP_PIN_GPIO97,
MFP_PIN_GPIO98,
MFP_PIN_GPIO99,
MFP_PIN_GPIO100,
MFP_PIN_GPIO101,
MFP_PIN_GPIO102,
MFP_PIN_GPIO103,
MFP_PIN_GPIO104,
MFP_PIN_GPIO105,
MFP_PIN_GPIO106,
MFP_PIN_GPIO107,
MFP_PIN_GPIO108,
MFP_PIN_GPIO109,
MFP_PIN_GPIO110,
MFP_PIN_GPIO111,
MFP_PIN_GPIO112,
MFP_PIN_GPIO113,
MFP_PIN_GPIO114,
MFP_PIN_GPIO115,
MFP_PIN_GPIO116,
MFP_PIN_GPIO117,
MFP_PIN_GPIO118,
MFP_PIN_GPIO119,
MFP_PIN_GPIO120,
MFP_PIN_GPIO121,
MFP_PIN_GPIO122,
MFP_PIN_GPIO123,
MFP_PIN_GPIO124,
MFP_PIN_GPIO125,
MFP_PIN_GPIO126,
MFP_PIN_GPIO127,
MFP_PIN_GPIO0_2,
MFP_PIN_GPIO1_2,
MFP_PIN_GPIO2_2,
MFP_PIN_GPIO3_2,
MFP_PIN_GPIO4_2,
MFP_PIN_GPIO5_2,
MFP_PIN_GPIO6_2,
MFP_PIN_GPIO7_2,
MFP_PIN_GPIO8_2,
MFP_PIN_GPIO9_2,
MFP_PIN_GPIO10_2,
MFP_PIN_GPIO11_2,
MFP_PIN_GPIO12_2,
MFP_PIN_GPIO13_2,
MFP_PIN_GPIO14_2,
MFP_PIN_GPIO15_2,
MFP_PIN_GPIO16_2,
MFP_PIN_GPIO17_2,
MFP_PIN_ULPI_STP,
MFP_PIN_ULPI_NXT,
MFP_PIN_ULPI_DIR,
MFP_PIN_nXCVREN,
MFP_PIN_DF_CLE_nOE,
MFP_PIN_DF_nADV1_ALE,
MFP_PIN_DF_SCLK_E,
MFP_PIN_DF_SCLK_S,
MFP_PIN_nBE0,
MFP_PIN_nBE1,
MFP_PIN_DF_nADV2_ALE,
MFP_PIN_DF_INT_RnB,
MFP_PIN_DF_nCS0,
MFP_PIN_DF_nCS1,
MFP_PIN_nLUA,
MFP_PIN_nLLA,
MFP_PIN_DF_nWE,
MFP_PIN_DF_ALE_nWE,
MFP_PIN_DF_nRE_nOE,
MFP_PIN_DF_ADDR0,
MFP_PIN_DF_ADDR1,
MFP_PIN_DF_ADDR2,
MFP_PIN_DF_ADDR3,
MFP_PIN_DF_IO0,
MFP_PIN_DF_IO1,
MFP_PIN_DF_IO2,
MFP_PIN_DF_IO3,
MFP_PIN_DF_IO4,
MFP_PIN_DF_IO5,
MFP_PIN_DF_IO6,
MFP_PIN_DF_IO7,
MFP_PIN_DF_IO8,
MFP_PIN_DF_IO9,
MFP_PIN_DF_IO10,
MFP_PIN_DF_IO11,
MFP_PIN_DF_IO12,
MFP_PIN_DF_IO13,
MFP_PIN_DF_IO14,
MFP_PIN_DF_IO15,
MFP_PIN_MAX,
};
/*
* a possible MFP configuration is represented by a 32-bit integer
*
* bit 0.. 9 - MFP Pin Number (1024 Pins Maximum)
* bit 10..12 - Alternate Function Selection
* bit 13..15 - Drive Strength
* bit 16..18 - Low Power Mode State
* bit 19..20 - Low Power Mode Edge Detection
* bit 21..22 - Run Mode Pull State
*
* to facilitate the definition, the following macros are provided
*
* MFP_CFG_DEFAULT - default MFP configuration value, with
* alternate function = 0,
* drive strength = fast 3mA (MFP_DS03X)
* low power mode = default
* edge detection = none
*
* MFP_CFG - default MFPR value with alternate function
* MFP_CFG_DRV - default MFPR value with alternate function and
* pin drive strength
* MFP_CFG_LPM - default MFPR value with alternate function and
* low power mode
* MFP_CFG_X - default MFPR value with alternate function,
* pin drive strength and low power mode
*/
typedef unsigned long mfp_cfg_t;
#define MFP_PIN(x) ((x) & 0x3ff)
#define MFP_AF0 (0x0 << 10)
#define MFP_AF1 (0x1 << 10)
#define MFP_AF2 (0x2 << 10)
#define MFP_AF3 (0x3 << 10)
#define MFP_AF4 (0x4 << 10)
#define MFP_AF5 (0x5 << 10)
#define MFP_AF6 (0x6 << 10)
#define MFP_AF7 (0x7 << 10)
#define MFP_AF_MASK (0x7 << 10)
#define MFP_AF(x) (((x) >> 10) & 0x7)
#define MFP_DS01X (0x0 << 13)
#define MFP_DS02X (0x1 << 13)
#define MFP_DS03X (0x2 << 13)
#define MFP_DS04X (0x3 << 13)
#define MFP_DS06X (0x4 << 13)
#define MFP_DS08X (0x5 << 13)
#define MFP_DS10X (0x6 << 13)
#define MFP_DS13X (0x7 << 13)
#define MFP_DS_MASK (0x7 << 13)
#define MFP_DS(x) (((x) >> 13) & 0x7)
#define MFP_LPM_INPUT (0x0 << 16)
#define MFP_LPM_DRIVE_LOW (0x1 << 16)
#define MFP_LPM_DRIVE_HIGH (0x2 << 16)
#define MFP_LPM_PULL_LOW (0x3 << 16)
#define MFP_LPM_PULL_HIGH (0x4 << 16)
#define MFP_LPM_FLOAT (0x5 << 16)
#define MFP_LPM_STATE_MASK (0x7 << 16)
#define MFP_LPM_STATE(x) (((x) >> 16) & 0x7)
#define MFP_LPM_EDGE_NONE (0x0 << 19)
#define MFP_LPM_EDGE_RISE (0x1 << 19)
#define MFP_LPM_EDGE_FALL (0x2 << 19)
#define MFP_LPM_EDGE_BOTH (0x3 << 19)
#define MFP_LPM_EDGE_MASK (0x3 << 19)
#define MFP_LPM_EDGE(x) (((x) >> 19) & 0x3)
#define MFP_PULL_NONE (0x0 << 21)
#define MFP_PULL_LOW (0x1 << 21)
#define MFP_PULL_HIGH (0x2 << 21)
#define MFP_PULL_BOTH (0x3 << 21)
#define MFP_PULL_MASK (0x3 << 21)
#define MFP_PULL(x) (((x) >> 21) & 0x3)
#define MFP_CFG_DEFAULT (MFP_AF0 | MFP_DS03X | MFP_LPM_INPUT |\
MFP_LPM_EDGE_NONE | MFP_PULL_NONE)
#define MFP_CFG(pin, af) \
((MFP_CFG_DEFAULT & ~MFP_AF_MASK) |\
(MFP_PIN(MFP_PIN_##pin) | MFP_##af))
#define MFP_CFG_DRV(pin, af, drv) \
((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DS_MASK)) |\
(MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_##drv))
#define MFP_CFG_LPM(pin, af, lpm) \
((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_LPM_STATE_MASK)) |\
(MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_LPM_##lpm))
#define MFP_CFG_X(pin, af, drv, lpm) \
((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DS_MASK | MFP_LPM_STATE_MASK)) |\
(MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_##drv | MFP_LPM_##lpm))
#endif /* __ASM_ARCH_MFP_H */
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