diff options
Diffstat (limited to 'include/asm-arm/arch-at91rm9200/pio.h')
| -rw-r--r-- | include/asm-arm/arch-at91rm9200/pio.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/include/asm-arm/arch-at91rm9200/pio.h b/include/asm-arm/arch-at91rm9200/pio.h new file mode 100644 index 00000000000..a89501b4a70 --- /dev/null +++ b/include/asm-arm/arch-at91rm9200/pio.h @@ -0,0 +1,115 @@ +/* + * include/asm-arm/arch-at91rm9200/pio.h + * + * Copyright (C) 2003 SAN People + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#ifndef __ASM_ARCH_PIO_H +#define __ASM_ARCH_PIO_H + +#include <asm/arch/hardware.h> + +static inline void AT91_CfgPIO_USART0(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA17_TXD0 | AT91_PA18_RXD0 | AT91_PA20_CTS0); + + /* + * Errata #39 - RTS0 is not internally connected to PA21. We need to drive + * the pin manually. Default is off (RTS is active low). + */ + at91_sys_write(AT91_PIOA + PIO_PER, AT91_PA21_RTS0); + at91_sys_write(AT91_PIOA + PIO_OER, AT91_PA21_RTS0); + at91_sys_write(AT91_PIOA + PIO_SODR, AT91_PA21_RTS0); +} + +static inline void AT91_CfgPIO_USART1(void) { + at91_sys_write(AT91_PIOB + PIO_PDR, AT91_PB18_RI1 | AT91_PB19_DTR1 + | AT91_PB20_TXD1 | AT91_PB21_RXD1 | AT91_PB23_DCD1 + | AT91_PB24_CTS1 | AT91_PB25_DSR1 | AT91_PB26_RTS1); +} + +static inline void AT91_CfgPIO_USART2(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA22_RXD2 | AT91_PA23_TXD2); +} + +static inline void AT91_CfgPIO_USART3(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA5_TXD3 | AT91_PA6_RXD3); + at91_sys_write(AT91_PIOA + PIO_BSR, AT91_PA5_TXD3 | AT91_PA6_RXD3); +} + +static inline void AT91_CfgPIO_DBGU(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA31_DTXD | AT91_PA30_DRXD); +} + +/* + * Enable the Two-Wire interface. + */ +static inline void AT91_CfgPIO_TWI(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA25_TWD | AT91_PA26_TWCK); + at91_sys_write(AT91_PIOA + PIO_ASR, AT91_PA25_TWD | AT91_PA26_TWCK); + at91_sys_write(AT91_PIOA + PIO_MDER, AT91_PA25_TWD | AT91_PA26_TWCK); /* open drain */ +} + +/* + * Enable the Serial Peripheral Interface. + */ +static inline void AT91_CfgPIO_SPI(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA0_MISO | AT91_PA1_MOSI | AT91_PA2_SPCK); +} + +static inline void AT91_CfgPIO_SPI_CS0(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA3_NPCS0); +} + +static inline void AT91_CfgPIO_SPI_CS1(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA4_NPCS1); +} + +static inline void AT91_CfgPIO_SPI_CS2(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA5_NPCS2); +} + +static inline void AT91_CfgPIO_SPI_CS3(void) { + at91_sys_write(AT91_PIOA + PIO_PDR, AT91_PA6_NPCS3); +} + +/* + * Select the DataFlash card. + */ +static inline void AT91_CfgPIO_DataFlashCard(void) { + at91_sys_write(AT91_PIOB + PIO_PER, AT91_PIO_P(7)); + at91_sys_write(AT91_PIOB + PIO_OER, AT91_PIO_P(7)); + at91_sys_write(AT91_PIOB + PIO_CODR, AT91_PIO_P(7)); +} + +/* + * Enable NAND Flash (SmartMedia) interface. + */ +static inline void AT91_CfgPIO_SmartMedia(void) { + /* enable PC0=SMCE, PC1=SMOE, PC3=SMWE, A21=CLE, A22=ALE */ + at91_sys_write(AT91_PIOC + PIO_ASR, AT91_PC0_BFCK | AT91_PC1_BFRDY_SMOE | AT91_PC3_BFBAA_SMWE); + at91_sys_write(AT91_PIOC + PIO_PDR, AT91_PC0_BFCK | AT91_PC1_BFRDY_SMOE | AT91_PC3_BFBAA_SMWE); + + /* Configure PC2 as input (signal READY of the SmartMedia) */ + at91_sys_write(AT91_PIOC + PIO_PER, AT91_PC2_BFAVD); /* enable direct output enable */ + at91_sys_write(AT91_PIOC + PIO_ODR, AT91_PC2_BFAVD); /* disable output */ + + /* Configure PB1 as input (signal Card Detect of the SmartMedia) */ + at91_sys_write(AT91_PIOB + PIO_PER, AT91_PIO_P(1)); /* enable direct output enable */ + at91_sys_write(AT91_PIOB + PIO_ODR, AT91_PIO_P(1)); /* disable output */ +} + +static inline int AT91_PIO_SmartMedia_RDY(void) { + return (at91_sys_read(AT91_PIOC + PIO_PDSR) & AT91_PIO_P(2)) ? 1 : 0; +} + +static inline int AT91_PIO_SmartMedia_CardDetect(void) { + return (at91_sys_read(AT91_PIOB + PIO_PDSR) & AT91_PIO_P(1)) ? 1 : 0; +} + +#endif |