diff options
Diffstat (limited to 'include/asm-arm/arch-pxa/mfp-pxa3xx.h')
| -rw-r--r-- | include/asm-arm/arch-pxa/mfp-pxa3xx.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/include/asm-arm/arch-pxa/mfp-pxa3xx.h b/include/asm-arm/arch-pxa/mfp-pxa3xx.h index 5da1857d547..1f6b35c015d 100644 --- a/include/asm-arm/arch-pxa/mfp-pxa3xx.h +++ b/include/asm-arm/arch-pxa/mfp-pxa3xx.h @@ -1,6 +1,69 @@ #ifndef __ASM_ARCH_MFP_PXA3XX_H #define __ASM_ARCH_MFP_PXA3XX_H +#define MFPR_BASE (0x40e10000) +#define MFPR_SIZE (PAGE_SIZE) + +/* MFPR register bit definitions */ +#define MFPR_PULL_SEL (0x1 << 15) +#define MFPR_PULLUP_EN (0x1 << 14) +#define MFPR_PULLDOWN_EN (0x1 << 13) +#define MFPR_SLEEP_SEL (0x1 << 9) +#define MFPR_SLEEP_OE_N (0x1 << 7) +#define MFPR_EDGE_CLEAR (0x1 << 6) +#define MFPR_EDGE_FALL_EN (0x1 << 5) +#define MFPR_EDGE_RISE_EN (0x1 << 4) + +#define MFPR_SLEEP_DATA(x) ((x) << 8) +#define MFPR_DRIVE(x) (((x) & 0x7) << 10) +#define MFPR_AF_SEL(x) (((x) & 0x7) << 0) + +#define MFPR_EDGE_NONE (0) +#define MFPR_EDGE_RISE (MFPR_EDGE_RISE_EN) +#define MFPR_EDGE_FALL (MFPR_EDGE_FALL_EN) +#define MFPR_EDGE_BOTH (MFPR_EDGE_RISE | MFPR_EDGE_FALL) + +/* + * Table that determines the low power modes outputs, with actual settings + * used in parentheses for don't-care values. Except for the float output, + * the configured driven and pulled levels match, so if there is a need for + * non-LPM pulled output, the same configuration could probably be used. + * + * Output value sleep_oe_n sleep_data pullup_en pulldown_en pull_sel + * (bit 7) (bit 8) (bit 14) (bit 13) (bit 15) + * + * Input 0 X(0) X(0) X(0) 0 + * Drive 0 0 0 0 X(1) 0 + * Drive 1 0 1 X(1) 0 0 + * Pull hi (1) 1 X(1) 1 0 0 + * Pull lo (0) 1 X(0) 0 1 0 + * Z (float) 1 X(0) 0 0 0 + */ +#define MFPR_LPM_INPUT (0) +#define MFPR_LPM_DRIVE_LOW (MFPR_SLEEP_DATA(0) | MFPR_PULLDOWN_EN) +#define MFPR_LPM_DRIVE_HIGH (MFPR_SLEEP_DATA(1) | MFPR_PULLUP_EN) +#define MFPR_LPM_PULL_LOW (MFPR_LPM_DRIVE_LOW | MFPR_SLEEP_OE_N) +#define MFPR_LPM_PULL_HIGH (MFPR_LPM_DRIVE_HIGH | MFPR_SLEEP_OE_N) +#define MFPR_LPM_FLOAT (MFPR_SLEEP_OE_N) +#define MFPR_LPM_MASK (0xe080) + +/* + * The pullup and pulldown state of the MFP pin at run mode is by default + * determined by the selected alternate function. In case that some buggy + * devices need to override this default behavior, the definitions below + * indicates the setting of corresponding MFPR bits + * + * Definition pull_sel pullup_en pulldown_en + * MFPR_PULL_NONE 0 0 0 + * MFPR_PULL_LOW 1 0 1 + * MFPR_PULL_HIGH 1 1 0 + * MFPR_PULL_BOTH 1 1 1 + */ +#define MFPR_PULL_NONE (0) +#define MFPR_PULL_LOW (MFPR_PULL_SEL | MFPR_PULLDOWN_EN) +#define MFPR_PULL_BOTH (MFPR_PULL_LOW | MFPR_PULLUP_EN) +#define MFPR_PULL_HIGH (MFPR_PULL_SEL | MFPR_PULLUP_EN) + /* PXA3xx common MFP configurations - processor specific ones defined * in mfp-pxa300.h and mfp-pxa320.h */ @@ -134,4 +197,56 @@ #define GPIO5_2_GPIO MFP_CFG(GPIO5_2, AF0) #define GPIO6_2_GPIO MFP_CFG(GPIO6_2, AF0) +/* + * each MFP pin will have a MFPR register, since the offset of the + * register varies between processors, the processor specific code + * should initialize the pin offsets by pxa3xx_mfp_init_addr() + * + * pxa3xx_mfp_init_addr - accepts a table of "pxa3xx_mfp_addr_map" + * structure, which represents a range of MFP pins from "start" to + * "end", with the offset begining at "offset", to define a single + * 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 } + +/* + * 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(unsigned long *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); #endif /* __ASM_ARCH_MFP_PXA3XX_H */ |