2 * (C) Copyright 2007-2008
3 * Stelian Pop <stelian@popies.net>
4 * Lead Tech Design <www.leadtechdesign.com>
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <asm/arch/at91_common.h>
12 #include <asm/arch/at91_pmc.h>
13 #include <asm/arch/gpio.h>
16 * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all
17 * peripheral pins. Good to have if hardware is soldered optionally
18 * or in case of SPI no slave is selected. Avoid lines to float
19 * needlessly. Use a short local PUP define.
21 * Due to errata "TXD floats when CTS is inactive" pullups are always
24 #ifdef CONFIG_AT91_GPIO_PULLUP
25 # define PUP CONFIG_AT91_GPIO_PULLUP
30 void at91_serial0_hw_init(void)
32 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
34 at91_set_a_periph(AT91_PIO_PORTC, 8, 1); /* TXD0 */
35 at91_set_a_periph(AT91_PIO_PORTC, 9, 0); /* RXD0 */
36 writel(1 << ATMEL_ID_USART0, &pmc->pcer);
39 void at91_serial1_hw_init(void)
41 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
43 at91_set_a_periph(AT91_PIO_PORTC, 12, 1); /* TXD1 */
44 at91_set_a_periph(AT91_PIO_PORTC, 13, 0); /* RXD1 */
45 writel(1 << ATMEL_ID_USART1, &pmc->pcer);
48 void at91_serial2_hw_init(void)
50 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
52 at91_set_a_periph(AT91_PIO_PORTC, 14, 1); /* TXD2 */
53 at91_set_a_periph(AT91_PIO_PORTC, 15, 0); /* RXD2 */
54 writel(1 << ATMEL_ID_USART2, &pmc->pcer);
57 void at91_seriald_hw_init(void)
59 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
61 at91_set_a_periph(AT91_PIO_PORTA, 9, 0); /* DRXD */
62 at91_set_a_periph(AT91_PIO_PORTA, 10, 1); /* DTXD */
63 writel(1 << ATMEL_ID_SYS, &pmc->pcer);
66 #if defined(CONFIG_HAS_DATAFLASH) || defined(CONFIG_ATMEL_SPI)
67 void at91_spi0_hw_init(unsigned long cs_mask)
69 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
71 at91_set_a_periph(AT91_PIO_PORTA, 0, PUP); /* SPI0_MISO */
72 at91_set_a_periph(AT91_PIO_PORTA, 1, PUP); /* SPI0_MOSI */
73 at91_set_a_periph(AT91_PIO_PORTA, 2, PUP); /* SPI0_SPCK */
76 writel(1 << ATMEL_ID_SPI0, &pmc->pcer);
78 if (cs_mask & (1 << 0)) {
79 at91_set_a_periph(AT91_PIO_PORTA, 3, 1);
81 if (cs_mask & (1 << 1)) {
82 at91_set_a_periph(AT91_PIO_PORTA, 4, 1);
84 if (cs_mask & (1 << 2)) {
85 at91_set_a_periph(AT91_PIO_PORTA, 5, 1);
87 if (cs_mask & (1 << 3)) {
88 at91_set_a_periph(AT91_PIO_PORTA, 6, 1);
90 if (cs_mask & (1 << 4)) {
91 at91_set_pio_output(AT91_PIO_PORTA, 3, 1);
93 if (cs_mask & (1 << 5)) {
94 at91_set_pio_output(AT91_PIO_PORTA, 4, 1);
96 if (cs_mask & (1 << 6)) {
97 at91_set_pio_output(AT91_PIO_PORTA, 5, 1);
99 if (cs_mask & (1 << 7)) {
100 at91_set_pio_output(AT91_PIO_PORTA, 6, 1);
104 void at91_spi1_hw_init(unsigned long cs_mask)
106 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
108 at91_set_a_periph(AT91_PIO_PORTB, 30, PUP); /* SPI1_MISO */
109 at91_set_a_periph(AT91_PIO_PORTB, 31, PUP); /* SPI1_MOSI */
110 at91_set_a_periph(AT91_PIO_PORTB, 29, PUP); /* SPI1_SPCK */
113 writel(1 << ATMEL_ID_SPI1, &pmc->pcer);
115 if (cs_mask & (1 << 0)) {
116 at91_set_a_periph(AT91_PIO_PORTB, 28, 1);
118 if (cs_mask & (1 << 1)) {
119 at91_set_b_periph(AT91_PIO_PORTA, 24, 1);
121 if (cs_mask & (1 << 2)) {
122 at91_set_b_periph(AT91_PIO_PORTA, 25, 1);
124 if (cs_mask & (1 << 3)) {
125 at91_set_a_periph(AT91_PIO_PORTA, 26, 1);
127 if (cs_mask & (1 << 4)) {
128 at91_set_pio_output(AT91_PIO_PORTB, 28, 1);
130 if (cs_mask & (1 << 5)) {
131 at91_set_pio_output(AT91_PIO_PORTA, 24, 1);
133 if (cs_mask & (1 << 6)) {
134 at91_set_pio_output(AT91_PIO_PORTA, 25, 1);
136 if (cs_mask & (1 << 7)) {
137 at91_set_pio_output(AT91_PIO_PORTA, 26, 1);