]>
Commit | Line | Data |
---|---|---|
d703355f AB |
1 | /* |
2 | * [partely copied from arch/arm/cpu/arm926ejs/at91/arm9260_devices.c] | |
3 | * | |
4 | * (C) Copyright 2011 | |
5 | * Andreas Bießmann <andreas.devel@googlemail.com> | |
6 | * | |
7 | * (C) Copyright 2007-2008 | |
c9e798d3 | 8 | * Stelian Pop <stelian@popies.net> |
d703355f AB |
9 | * Lead Tech Design <www.leadtechdesign.com> |
10 | * | |
1a459660 | 11 | * SPDX-License-Identifier: GPL-2.0+ |
d703355f AB |
12 | */ |
13 | ||
14 | #include <common.h> | |
15 | #include <asm/io.h> | |
16 | #include <asm/arch/at91_common.h> | |
17 | #include <asm/arch/at91_pmc.h> | |
18 | #include <asm/arch/gpio.h> | |
19 | ||
20 | /* | |
21 | * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all | |
22 | * peripheral pins. Good to have if hardware is soldered optionally | |
23 | * or in case of SPI no slave is selected. Avoid lines to float | |
24 | * needlessly. Use a short local PUP define. | |
25 | * | |
26 | * Due to errata "TXD floats when CTS is inactive" pullups are always | |
27 | * on for TXD pins. | |
28 | */ | |
29 | #ifdef CONFIG_AT91_GPIO_PULLUP | |
30 | # define PUP CONFIG_AT91_GPIO_PULLUP | |
31 | #else | |
32 | # define PUP 0 | |
33 | #endif | |
34 | ||
35 | void at91_serial0_hw_init(void) | |
36 | { | |
37 | at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; | |
38 | ||
39 | at91_set_a_periph(AT91_PIO_PORTA, 17, 1); /* TXD0 */ | |
40 | at91_set_a_periph(AT91_PIO_PORTA, 18, PUP); /* RXD0 */ | |
41 | writel(1 << ATMEL_ID_USART0, &pmc->pcer); | |
42 | } | |
43 | ||
44 | void at91_serial1_hw_init(void) | |
45 | { | |
46 | at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; | |
47 | ||
48 | at91_set_a_periph(AT91_PIO_PORTB, 20, PUP); /* RXD1 */ | |
49 | at91_set_a_periph(AT91_PIO_PORTB, 21, 1); /* TXD1 */ | |
50 | writel(1 << ATMEL_ID_USART1, &pmc->pcer); | |
51 | } | |
52 | ||
53 | void at91_serial2_hw_init(void) | |
54 | { | |
55 | at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; | |
56 | ||
57 | at91_set_a_periph(AT91_PIO_PORTA, 22, PUP); /* RXD2 */ | |
58 | at91_set_a_periph(AT91_PIO_PORTA, 23, 1); /* TXD2 */ | |
59 | writel(1 << ATMEL_ID_USART2, &pmc->pcer); | |
60 | } | |
61 | ||
d703355f AB |
62 | void at91_seriald_hw_init(void) |
63 | { | |
64 | at91_set_a_periph(AT91_PIO_PORTA, 30, PUP); /* DRXD */ | |
65 | at91_set_a_periph(AT91_PIO_PORTA, 31, 1); /* DTXD */ | |
66 | /* writing SYS to PCER has no effect on AT91RM9200 */ | |
67 | } |