1 /*
2 * (C) Copyright 2007-2008
3 * Stelian Pop <stelian@popies.net>
4 * Lead Tech Design <www.leadtechdesign.com>
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <asm/io.h>
11 #include <asm/arch/at91_common.h>
12 #include <asm/arch/clk.h>
13 #include <asm/arch/gpio.h>
14
15 /*
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.
20 *
21 * Due to errata "TXD floats when CTS is inactive" pullups are always
22 * on for TXD pins.
23 */
24 #ifdef CONFIG_AT91_GPIO_PULLUP
25 # define PUP CONFIG_AT91_GPIO_PULLUP
26 #else
27 # define PUP 0
28 #endif
29
at91_serial0_hw_init(void)30 void at91_serial0_hw_init(void)
31 {
32 at91_set_a_periph(AT91_PIO_PORTC, 8, 1); /* TXD0 */
33 at91_set_a_periph(AT91_PIO_PORTC, 9, 0); /* RXD0 */
34 at91_periph_clk_enable(ATMEL_ID_USART0);
35 }
36
at91_serial1_hw_init(void)37 void at91_serial1_hw_init(void)
38 {
39 at91_set_a_periph(AT91_PIO_PORTC, 12, 1); /* TXD1 */
40 at91_set_a_periph(AT91_PIO_PORTC, 13, 0); /* RXD1 */
41 at91_periph_clk_enable(ATMEL_ID_USART1);
42 }
43
at91_serial2_hw_init(void)44 void at91_serial2_hw_init(void)
45 {
46 at91_set_a_periph(AT91_PIO_PORTC, 14, 1); /* TXD2 */
47 at91_set_a_periph(AT91_PIO_PORTC, 15, 0); /* RXD2 */
48 at91_periph_clk_enable(ATMEL_ID_USART2);
49 }
50
at91_seriald_hw_init(void)51 void at91_seriald_hw_init(void)
52 {
53 at91_set_a_periph(AT91_PIO_PORTA, 9, 0); /* DRXD */
54 at91_set_a_periph(AT91_PIO_PORTA, 10, 1); /* DTXD */
55 at91_periph_clk_enable(ATMEL_ID_SYS);
56 }
57
58 #ifdef CONFIG_ATMEL_SPI
at91_spi0_hw_init(unsigned long cs_mask)59 void at91_spi0_hw_init(unsigned long cs_mask)
60 {
61 at91_set_a_periph(AT91_PIO_PORTA, 0, PUP); /* SPI0_MISO */
62 at91_set_a_periph(AT91_PIO_PORTA, 1, PUP); /* SPI0_MOSI */
63 at91_set_a_periph(AT91_PIO_PORTA, 2, PUP); /* SPI0_SPCK */
64
65 at91_periph_clk_enable(ATMEL_ID_SPI0);
66
67 if (cs_mask & (1 << 0)) {
68 at91_set_a_periph(AT91_PIO_PORTA, 3, 1);
69 }
70 if (cs_mask & (1 << 1)) {
71 at91_set_a_periph(AT91_PIO_PORTA, 4, 1);
72 }
73 if (cs_mask & (1 << 2)) {
74 at91_set_a_periph(AT91_PIO_PORTA, 5, 1);
75 }
76 if (cs_mask & (1 << 3)) {
77 at91_set_a_periph(AT91_PIO_PORTA, 6, 1);
78 }
79 if (cs_mask & (1 << 4)) {
80 at91_set_pio_output(AT91_PIO_PORTA, 3, 1);
81 }
82 if (cs_mask & (1 << 5)) {
83 at91_set_pio_output(AT91_PIO_PORTA, 4, 1);
84 }
85 if (cs_mask & (1 << 6)) {
86 at91_set_pio_output(AT91_PIO_PORTA, 5, 1);
87 }
88 if (cs_mask & (1 << 7)) {
89 at91_set_pio_output(AT91_PIO_PORTA, 6, 1);
90 }
91 }
92
at91_spi1_hw_init(unsigned long cs_mask)93 void at91_spi1_hw_init(unsigned long cs_mask)
94 {
95 at91_set_a_periph(AT91_PIO_PORTB, 30, PUP); /* SPI1_MISO */
96 at91_set_a_periph(AT91_PIO_PORTB, 31, PUP); /* SPI1_MOSI */
97 at91_set_a_periph(AT91_PIO_PORTB, 29, PUP); /* SPI1_SPCK */
98
99 at91_periph_clk_enable(ATMEL_ID_SPI1);
100
101 if (cs_mask & (1 << 0)) {
102 at91_set_a_periph(AT91_PIO_PORTB, 28, 1);
103 }
104 if (cs_mask & (1 << 1)) {
105 at91_set_b_periph(AT91_PIO_PORTA, 24, 1);
106 }
107 if (cs_mask & (1 << 2)) {
108 at91_set_b_periph(AT91_PIO_PORTA, 25, 1);
109 }
110 if (cs_mask & (1 << 3)) {
111 at91_set_a_periph(AT91_PIO_PORTA, 26, 1);
112 }
113 if (cs_mask & (1 << 4)) {
114 at91_set_pio_output(AT91_PIO_PORTB, 28, 1);
115 }
116 if (cs_mask & (1 << 5)) {
117 at91_set_pio_output(AT91_PIO_PORTA, 24, 1);
118 }
119 if (cs_mask & (1 << 6)) {
120 at91_set_pio_output(AT91_PIO_PORTA, 25, 1);
121 }
122 if (cs_mask & (1 << 7)) {
123 at91_set_pio_output(AT91_PIO_PORTA, 26, 1);
124 }
125 }
126 #endif
127