diff options
author | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
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committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/arch/arm/mach-at91/arm926ejs/at91sam9261_devices.c | |
parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/arch/arm/mach-at91/arm926ejs/at91sam9261_devices.c')
-rw-r--r-- | roms/u-boot/arch/arm/mach-at91/arm926ejs/at91sam9261_devices.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/mach-at91/arm926ejs/at91sam9261_devices.c b/roms/u-boot/arch/arm/mach-at91/arm926ejs/at91sam9261_devices.c new file mode 100644 index 000000000..0c2b9f2ec --- /dev/null +++ b/roms/u-boot/arch/arm/mach-at91/arm926ejs/at91sam9261_devices.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2007-2008 + * Stelian Pop <stelian@popies.net> + * Lead Tech Design <www.leadtechdesign.com> + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/at91_common.h> +#include <asm/arch/clk.h> +#include <asm/arch/gpio.h> + +/* + * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all + * peripheral pins. Good to have if hardware is soldered optionally + * or in case of SPI no slave is selected. Avoid lines to float + * needlessly. Use a short local PUP define. + * + * Due to errata "TXD floats when CTS is inactive" pullups are always + * on for TXD pins. + */ +#ifdef CONFIG_AT91_GPIO_PULLUP +# define PUP CONFIG_AT91_GPIO_PULLUP +#else +# define PUP 0 +#endif + +void at91_serial0_hw_init(void) +{ + at91_set_a_periph(AT91_PIO_PORTC, 8, 1); /* TXD0 */ + at91_set_a_periph(AT91_PIO_PORTC, 9, 0); /* RXD0 */ + at91_periph_clk_enable(ATMEL_ID_USART0); +} + +void at91_serial1_hw_init(void) +{ + at91_set_a_periph(AT91_PIO_PORTC, 12, 1); /* TXD1 */ + at91_set_a_periph(AT91_PIO_PORTC, 13, 0); /* RXD1 */ + at91_periph_clk_enable(ATMEL_ID_USART1); +} + +void at91_serial2_hw_init(void) +{ + at91_set_a_periph(AT91_PIO_PORTC, 14, 1); /* TXD2 */ + at91_set_a_periph(AT91_PIO_PORTC, 15, 0); /* RXD2 */ + at91_periph_clk_enable(ATMEL_ID_USART2); +} + +void at91_seriald_hw_init(void) +{ + at91_set_a_periph(AT91_PIO_PORTA, 9, 0); /* DRXD */ + at91_set_a_periph(AT91_PIO_PORTA, 10, 1); /* DTXD */ + at91_periph_clk_enable(ATMEL_ID_SYS); +} + +#ifdef CONFIG_ATMEL_SPI +void at91_spi0_hw_init(unsigned long cs_mask) +{ + at91_set_a_periph(AT91_PIO_PORTA, 0, PUP); /* SPI0_MISO */ + at91_set_a_periph(AT91_PIO_PORTA, 1, PUP); /* SPI0_MOSI */ + at91_set_a_periph(AT91_PIO_PORTA, 2, PUP); /* SPI0_SPCK */ + + at91_periph_clk_enable(ATMEL_ID_SPI0); + + if (cs_mask & (1 << 0)) { + at91_set_a_periph(AT91_PIO_PORTA, 3, 1); + } + if (cs_mask & (1 << 1)) { + at91_set_a_periph(AT91_PIO_PORTA, 4, 1); + } + if (cs_mask & (1 << 2)) { + at91_set_a_periph(AT91_PIO_PORTA, 5, 1); + } + if (cs_mask & (1 << 3)) { + at91_set_a_periph(AT91_PIO_PORTA, 6, 1); + } + if (cs_mask & (1 << 4)) { + at91_set_pio_output(AT91_PIO_PORTA, 3, 1); + } + if (cs_mask & (1 << 5)) { + at91_set_pio_output(AT91_PIO_PORTA, 4, 1); + } + if (cs_mask & (1 << 6)) { + at91_set_pio_output(AT91_PIO_PORTA, 5, 1); + } + if (cs_mask & (1 << 7)) { + at91_set_pio_output(AT91_PIO_PORTA, 6, 1); + } +} + +void at91_spi1_hw_init(unsigned long cs_mask) +{ + at91_set_a_periph(AT91_PIO_PORTB, 30, PUP); /* SPI1_MISO */ + at91_set_a_periph(AT91_PIO_PORTB, 31, PUP); /* SPI1_MOSI */ + at91_set_a_periph(AT91_PIO_PORTB, 29, PUP); /* SPI1_SPCK */ + + at91_periph_clk_enable(ATMEL_ID_SPI1); + + if (cs_mask & (1 << 0)) { + at91_set_a_periph(AT91_PIO_PORTB, 28, 1); + } + if (cs_mask & (1 << 1)) { + at91_set_b_periph(AT91_PIO_PORTA, 24, 1); + } + if (cs_mask & (1 << 2)) { + at91_set_b_periph(AT91_PIO_PORTA, 25, 1); + } + if (cs_mask & (1 << 3)) { + at91_set_a_periph(AT91_PIO_PORTA, 26, 1); + } + if (cs_mask & (1 << 4)) { + at91_set_pio_output(AT91_PIO_PORTB, 28, 1); + } + if (cs_mask & (1 << 5)) { + at91_set_pio_output(AT91_PIO_PORTA, 24, 1); + } + if (cs_mask & (1 << 6)) { + at91_set_pio_output(AT91_PIO_PORTA, 25, 1); + } + if (cs_mask & (1 << 7)) { + at91_set_pio_output(AT91_PIO_PORTA, 26, 1); + } +} +#endif |