[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>
This commit is contained in:
eric miao
Russell King
parent
0ad1fbc860
commit
7f7c8a6192
3 changed files with 263 additions and 207 deletions
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@ -1,6 +1,69 @@
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#ifndef __ASM_ARCH_MFP_PXA3XX_H
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#define __ASM_ARCH_MFP_PXA3XX_H
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#define MFPR_BASE (0x40e10000)
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#define MFPR_SIZE (PAGE_SIZE)
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/* MFPR register bit definitions */
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#define MFPR_PULL_SEL (0x1 << 15)
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#define MFPR_PULLUP_EN (0x1 << 14)
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#define MFPR_PULLDOWN_EN (0x1 << 13)
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#define MFPR_SLEEP_SEL (0x1 << 9)
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#define MFPR_SLEEP_OE_N (0x1 << 7)
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#define MFPR_EDGE_CLEAR (0x1 << 6)
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#define MFPR_EDGE_FALL_EN (0x1 << 5)
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#define MFPR_EDGE_RISE_EN (0x1 << 4)
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#define MFPR_SLEEP_DATA(x) ((x) << 8)
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#define MFPR_DRIVE(x) (((x) & 0x7) << 10)
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#define MFPR_AF_SEL(x) (((x) & 0x7) << 0)
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#define MFPR_EDGE_NONE (0)
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#define MFPR_EDGE_RISE (MFPR_EDGE_RISE_EN)
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#define MFPR_EDGE_FALL (MFPR_EDGE_FALL_EN)
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#define MFPR_EDGE_BOTH (MFPR_EDGE_RISE | MFPR_EDGE_FALL)
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/*
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* Table that determines the low power modes outputs, with actual settings
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* used in parentheses for don't-care values. Except for the float output,
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* the configured driven and pulled levels match, so if there is a need for
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* non-LPM pulled output, the same configuration could probably be used.
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*
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* Output value sleep_oe_n sleep_data pullup_en pulldown_en pull_sel
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* (bit 7) (bit 8) (bit 14) (bit 13) (bit 15)
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*
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* Input 0 X(0) X(0) X(0) 0
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* Drive 0 0 0 0 X(1) 0
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* Drive 1 0 1 X(1) 0 0
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* Pull hi (1) 1 X(1) 1 0 0
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* Pull lo (0) 1 X(0) 0 1 0
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* Z (float) 1 X(0) 0 0 0
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*/
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#define MFPR_LPM_INPUT (0)
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#define MFPR_LPM_DRIVE_LOW (MFPR_SLEEP_DATA(0) | MFPR_PULLDOWN_EN)
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#define MFPR_LPM_DRIVE_HIGH (MFPR_SLEEP_DATA(1) | MFPR_PULLUP_EN)
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#define MFPR_LPM_PULL_LOW (MFPR_LPM_DRIVE_LOW | MFPR_SLEEP_OE_N)
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#define MFPR_LPM_PULL_HIGH (MFPR_LPM_DRIVE_HIGH | MFPR_SLEEP_OE_N)
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#define MFPR_LPM_FLOAT (MFPR_SLEEP_OE_N)
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#define MFPR_LPM_MASK (0xe080)
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/*
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* The pullup and pulldown state of the MFP pin at run mode is by default
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* determined by the selected alternate function. In case that some buggy
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* devices need to override this default behavior, the definitions below
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* indicates the setting of corresponding MFPR bits
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*
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* Definition pull_sel pullup_en pulldown_en
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* MFPR_PULL_NONE 0 0 0
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* MFPR_PULL_LOW 1 0 1
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* MFPR_PULL_HIGH 1 1 0
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* MFPR_PULL_BOTH 1 1 1
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*/
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#define MFPR_PULL_NONE (0)
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#define MFPR_PULL_LOW (MFPR_PULL_SEL | MFPR_PULLDOWN_EN)
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#define MFPR_PULL_BOTH (MFPR_PULL_LOW | MFPR_PULLUP_EN)
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#define MFPR_PULL_HIGH (MFPR_PULL_SEL | MFPR_PULLUP_EN)
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/* PXA3xx common MFP configurations - processor specific ones defined
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* in mfp-pxa300.h and mfp-pxa320.h
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*/
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@ -134,4 +197,56 @@
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#define GPIO5_2_GPIO MFP_CFG(GPIO5_2, AF0)
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#define GPIO6_2_GPIO MFP_CFG(GPIO6_2, AF0)
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/*
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* each MFP pin will have a MFPR register, since the offset of the
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* register varies between processors, the processor specific code
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* should initialize the pin offsets by pxa3xx_mfp_init_addr()
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*
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* pxa3xx_mfp_init_addr - accepts a table of "pxa3xx_mfp_addr_map"
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* structure, which represents a range of MFP pins from "start" to
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* "end", with the offset begining at "offset", to define a single
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* pin, let "end" = -1
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*
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* use
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*
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* MFP_ADDR_X() to define a range of pins
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* MFP_ADDR() to define a single pin
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* MFP_ADDR_END to signal the end of pin offset definitions
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*/
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struct pxa3xx_mfp_addr_map {
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unsigned int start;
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unsigned int end;
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unsigned long offset;
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};
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#define MFP_ADDR_X(start, end, offset) \
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{ MFP_PIN_##start, MFP_PIN_##end, offset }
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#define MFP_ADDR(pin, offset) \
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{ MFP_PIN_##pin, -1, offset }
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#define MFP_ADDR_END { MFP_PIN_INVALID, 0 }
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/*
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* pxa3xx_mfp_read()/pxa3xx_mfp_write() - for direct read/write access
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* to the MFPR register
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*/
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unsigned long pxa3xx_mfp_read(int mfp);
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void pxa3xx_mfp_write(int mfp, unsigned long mfpr_val);
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/*
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* pxa3xx_mfp_config - configure the MFPR registers
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*
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* used by board specific initialization code
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*/
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void pxa3xx_mfp_config(unsigned long *mfp_cfgs, int num);
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/*
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* pxa3xx_mfp_init_addr() - initialize the mapping between mfp pin
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* index and MFPR register offset
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*
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* used by processor specific code
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*/
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void __init pxa3xx_mfp_init_addr(struct pxa3xx_mfp_addr_map *);
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void __init pxa3xx_init_mfp(void);
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#endif /* __ASM_ARCH_MFP_PXA3XX_H */
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@ -16,9 +16,6 @@
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#ifndef __ASM_ARCH_MFP_H
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#define __ASM_ARCH_MFP_H
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#define MFPR_BASE (0x40e10000)
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#define MFPR_SIZE (PAGE_SIZE)
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#define mfp_to_gpio(m) ((m) % 128)
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/* list of all the configurable MFP pins */
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@ -216,115 +213,22 @@ enum {
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MFP_PIN_MAX,
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};
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/*
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* Table that determines the low power modes outputs, with actual settings
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* used in parentheses for don't-care values. Except for the float output,
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* the configured driven and pulled levels match, so if there is a need for
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* non-LPM pulled output, the same configuration could probably be used.
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*
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* Output value sleep_oe_n sleep_data pullup_en pulldown_en pull_sel
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* (bit 7) (bit 8) (bit 14d) (bit 13d)
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*
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* Drive 0 0 0 0 X (1) 0
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* Drive 1 0 1 X (1) 0 0
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* Pull hi (1) 1 X(1) 1 0 0
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* Pull lo (0) 1 X(0) 0 1 0
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* Z (float) 1 X(0) 0 0 0
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*/
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#define MFP_LPM_DRIVE_LOW 0x8
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#define MFP_LPM_DRIVE_HIGH 0x6
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#define MFP_LPM_PULL_HIGH 0x7
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#define MFP_LPM_PULL_LOW 0x9
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#define MFP_LPM_FLOAT 0x1
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#define MFP_LPM_PULL_NEITHER 0x0
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/*
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* The pullup and pulldown state of the MFP pin is by default determined by
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* selected alternate function. In case some buggy devices need to override
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* this default behavior, pxa3xx_mfp_set_pull() can be invoked with one of
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* the following definition as the parameter.
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*
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* Definition pull_sel pullup_en pulldown_en
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* MFP_PULL_HIGH 1 1 0
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* MFP_PULL_LOW 1 0 1
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* MFP_PULL_BOTH 1 1 1
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* MFP_PULL_NONE 1 0 0
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* MFP_PULL_DEFAULT 0 X X
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*
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* NOTE: pxa3xx_mfp_set_pull() will modify the PULLUP_EN and PULLDOWN_EN
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* bits, which will cause potential conflicts with the low power mode
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* setting, device drivers should take care of this
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*/
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#define MFP_PULL_BOTH (0x7u)
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#define MFP_PULL_HIGH (0x6u)
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#define MFP_PULL_LOW (0x5u)
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#define MFP_PULL_NONE (0x4u)
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#define MFP_PULL_DEFAULT (0x0u)
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#define MFP_AF0 (0)
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#define MFP_AF1 (1)
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#define MFP_AF2 (2)
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#define MFP_AF3 (3)
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#define MFP_AF4 (4)
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#define MFP_AF5 (5)
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#define MFP_AF6 (6)
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#define MFP_AF7 (7)
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#define MFP_DS01X (0)
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#define MFP_DS02X (1)
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#define MFP_DS03X (2)
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#define MFP_DS04X (3)
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#define MFP_DS06X (4)
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#define MFP_DS08X (5)
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#define MFP_DS10X (6)
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#define MFP_DS12X (7)
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#define MFP_EDGE_BOTH 0x3
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#define MFP_EDGE_RISE 0x2
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#define MFP_EDGE_FALL 0x1
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#define MFP_EDGE_NONE 0x0
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#define MFPR_AF_MASK 0x0007
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#define MFPR_DRV_MASK 0x1c00
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#define MFPR_RDH_MASK 0x0200
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#define MFPR_LPM_MASK 0xe180
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#define MFPR_PULL_MASK 0xe000
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#define MFPR_EDGE_MASK 0x0070
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#define MFPR_ALT_OFFSET 0
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#define MFPR_ERE_OFFSET 4
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#define MFPR_EFE_OFFSET 5
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#define MFPR_EC_OFFSET 6
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#define MFPR_SON_OFFSET 7
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#define MFPR_SD_OFFSET 8
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#define MFPR_SS_OFFSET 9
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#define MFPR_DRV_OFFSET 10
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#define MFPR_PD_OFFSET 13
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#define MFPR_PU_OFFSET 14
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#define MFPR_PS_OFFSET 15
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#define MFPR(af, drv, rdh, lpm, edge) \
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(((af) & 0x7) | (((drv) & 0x7) << 10) |\
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(((rdh) & 0x1) << 9) |\
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(((lpm) & 0x3) << 7) |\
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(((lpm) & 0x4) << 12)|\
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(((lpm) & 0x8) << 10)|\
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((!(edge)) << 6) |\
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(((edge) & 0x1) << 5) |\
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(((edge) & 0x2) << 3))
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/*
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* a possible MFP configuration is represented by a 32-bit integer
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* bit 0..15 - MFPR value (16-bit)
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* bit 16..31 - mfp pin index (used to obtain the MFPR offset)
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*
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* bit 0.. 9 - MFP Pin Number (1024 Pins Maximum)
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* bit 10..12 - Alternate Function Selection
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* bit 13..15 - Drive Strength
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* bit 16..18 - Low Power Mode State
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* bit 19..20 - Low Power Mode Edge Detection
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* bit 21..22 - Run Mode Pull State
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*
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* to facilitate the definition, the following macros are provided
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*
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* MFPR_DEFAULT - default MFPR value, with
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* MFP_CFG_DEFAULT - default MFP configuration value, with
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* alternate function = 0,
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* drive strength = fast 1mA (MFP_DS01X)
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* drive strength = fast 3mA (MFP_DS03X)
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* low power mode = default
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* release dalay hold = false (RDH bit)
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* edge detection = none
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*
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* MFP_CFG - default MFPR value with alternate function
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@ -334,104 +238,74 @@ enum {
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* low power mode
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* MFP_CFG_X - default MFPR value with alternate function,
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* pin drive strength and low power mode
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*
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* use
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*
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* MFP_CFG_PIN - to get the MFP pin index
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* MFP_CFG_VAL - to get the corresponding MFPR value
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*/
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typedef uint32_t mfp_cfg_t;
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typedef unsigned long mfp_cfg_t;
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#define MFP_CFG_PIN(mfp_cfg) (((mfp_cfg) >> 16) & 0xffff)
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#define MFP_CFG_VAL(mfp_cfg) ((mfp_cfg) & 0xffff)
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#define MFP_PIN(x) ((x) & 0x3ff)
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/*
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* MFP register defaults to
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* drive strength fast 3mA (010'b)
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* edge detection logic disabled
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* alternate function 0
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*/
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#define MFPR_DEFAULT (0x0840)
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#define MFP_AF0 (0x0 << 10)
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#define MFP_AF1 (0x1 << 10)
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#define MFP_AF2 (0x2 << 10)
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#define MFP_AF3 (0x3 << 10)
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#define MFP_AF4 (0x4 << 10)
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#define MFP_AF5 (0x5 << 10)
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#define MFP_AF6 (0x6 << 10)
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#define MFP_AF7 (0x7 << 10)
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#define MFP_AF_MASK (0x7 << 10)
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#define MFP_AF(x) (((x) >> 10) & 0x7)
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#define MFP_DS01X (0x0 << 13)
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#define MFP_DS02X (0x1 << 13)
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#define MFP_DS03X (0x2 << 13)
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#define MFP_DS04X (0x3 << 13)
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#define MFP_DS06X (0x4 << 13)
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#define MFP_DS08X (0x5 << 13)
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#define MFP_DS10X (0x6 << 13)
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#define MFP_DS13X (0x7 << 13)
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#define MFP_DS_MASK (0x7 << 13)
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#define MFP_DS(x) (((x) >> 13) & 0x7)
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#define MFP_LPM_INPUT (0x0 << 16)
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#define MFP_LPM_DRIVE_LOW (0x1 << 16)
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#define MFP_LPM_DRIVE_HIGH (0x2 << 16)
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#define MFP_LPM_PULL_LOW (0x3 << 16)
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#define MFP_LPM_PULL_HIGH (0x4 << 16)
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#define MFP_LPM_FLOAT (0x5 << 16)
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#define MFP_LPM_STATE_MASK (0x7 << 16)
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#define MFP_LPM_STATE(x) (((x) >> 16) & 0x7)
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#define MFP_LPM_EDGE_NONE (0x0 << 19)
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#define MFP_LPM_EDGE_RISE (0x1 << 19)
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#define MFP_LPM_EDGE_FALL (0x2 << 19)
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#define MFP_LPM_EDGE_BOTH (0x3 << 19)
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#define MFP_LPM_EDGE_MASK (0x3 << 19)
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#define MFP_LPM_EDGE(x) (((x) >> 19) & 0x3)
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#define MFP_PULL_NONE (0x0 << 21)
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#define MFP_PULL_LOW (0x1 << 21)
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#define MFP_PULL_HIGH (0x2 << 21)
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#define MFP_PULL_BOTH (0x3 << 21)
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#define MFP_PULL_MASK (0x3 << 21)
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#define MFP_PULL(x) (((x) >> 21) & 0x3)
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#define MFP_CFG_DEFAULT (MFP_AF0 | MFP_DS03X | MFP_LPM_INPUT |\
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MFP_LPM_EDGE_NONE | MFP_PULL_NONE)
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#define MFP_CFG(pin, af) \
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((MFP_PIN_##pin << 16) | MFPR_DEFAULT | (MFP_##af))
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((MFP_CFG_DEFAULT & ~MFP_AF_MASK) |\
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(MFP_PIN(MFP_PIN_##pin) | MFP_##af))
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#define MFP_CFG_DRV(pin, af, drv) \
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((MFP_PIN_##pin << 16) | (MFPR_DEFAULT & ~MFPR_DRV_MASK) |\
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((MFP_##drv) << 10) | (MFP_##af))
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((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DS_MASK)) |\
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(MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_##drv))
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#define MFP_CFG_LPM(pin, af, lpm) \
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((MFP_PIN_##pin << 16) | (MFPR_DEFAULT & ~MFPR_LPM_MASK) |\
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(((MFP_LPM_##lpm) & 0x3) << 7) |\
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(((MFP_LPM_##lpm) & 0x4) << 12) |\
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(((MFP_LPM_##lpm) & 0x8) << 10) |\
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(MFP_##af))
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((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_LPM_STATE_MASK)) |\
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(MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_LPM_##lpm))
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#define MFP_CFG_X(pin, af, drv, lpm) \
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((MFP_PIN_##pin << 16) |\
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(MFPR_DEFAULT & ~(MFPR_DRV_MASK | MFPR_LPM_MASK)) |\
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((MFP_##drv) << 10) | (MFP_##af) |\
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(((MFP_LPM_##lpm) & 0x3) << 7) |\
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(((MFP_LPM_##lpm) & 0x4) << 12) |\
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(((MFP_LPM_##lpm) & 0x8) << 10))
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/*
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* each MFP pin will have a MFPR register, since the offset of the
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* register varies between processors, the processor specific code
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* should initialize the pin offsets by pxa3xx_mfp_init_addr()
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*
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* pxa3xx_mfp_init_addr - accepts a table of "pxa3xx_mfp_addr_map"
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* structure, which represents a range of MFP pins from "start" to
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* "end", with the offset begining at "offset", to define a single
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||||
* pin, let "end" = -1
|
||||
*
|
||||
* use
|
||||
*
|
||||
* MFP_ADDR_X() to define a range of pins
|
||||
* MFP_ADDR() to define a single pin
|
||||
* MFP_ADDR_END to signal the end of pin offset definitions
|
||||
*/
|
||||
struct pxa3xx_mfp_addr_map {
|
||||
unsigned int start;
|
||||
unsigned int end;
|
||||
unsigned long offset;
|
||||
};
|
||||
|
||||
#define MFP_ADDR_X(start, end, offset) \
|
||||
{ MFP_PIN_##start, MFP_PIN_##end, offset }
|
||||
|
||||
#define MFP_ADDR(pin, offset) \
|
||||
{ MFP_PIN_##pin, -1, offset }
|
||||
|
||||
#define MFP_ADDR_END { MFP_PIN_INVALID, 0 }
|
||||
|
||||
struct pxa3xx_mfp_pin {
|
||||
unsigned long mfpr_off; /* MFPRxx register offset */
|
||||
unsigned long mfpr_val; /* MFPRxx register value */
|
||||
};
|
||||
|
||||
/*
|
||||
* pxa3xx_mfp_read()/pxa3xx_mfp_write() - for direct read/write access
|
||||
* to the MFPR register
|
||||
*/
|
||||
unsigned long pxa3xx_mfp_read(int mfp);
|
||||
void pxa3xx_mfp_write(int mfp, unsigned long mfpr_val);
|
||||
|
||||
/*
|
||||
* pxa3xx_mfp_config - configure the MFPR registers
|
||||
*
|
||||
* used by board specific initialization code
|
||||
*/
|
||||
void pxa3xx_mfp_config(mfp_cfg_t *mfp_cfgs, int num);
|
||||
|
||||
/*
|
||||
* pxa3xx_mfp_init_addr() - initialize the mapping between mfp pin
|
||||
* index and MFPR register offset
|
||||
*
|
||||
* used by processor specific code
|
||||
*/
|
||||
void __init pxa3xx_mfp_init_addr(struct pxa3xx_mfp_addr_map *);
|
||||
void __init pxa3xx_init_mfp(void);
|
||||
((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 */
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue