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1 /*
2 * (C) Copyright 2007-2008
3 * Stelian Pop <stelian@popies.net>
4 * Lead Tech Design <www.leadtechdesign.com>
5 *
6 * (C) Copyright 2009-2011
7 * Daniel Gorsulowski <daniel.gorsulowski@esd.eu>
8 * esd electronic system design gmbh <www.esd.eu>
9 *
10 * SPDX-License-Identifier: GPL-2.0+
11 */
12
13 #include <common.h>
14 #include <asm/io.h>
15 #include <asm/arch/at91_common.h>
16 #include <asm/arch/at91_pmc.h>
17 #include <asm/arch/gpio.h>
18
19 /*
20 * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all
21 * peripheral pins. Good to have if hardware is soldered optionally
22 * or in case of SPI no slave is selected. Avoid lines to float
23 * needlessly. Use a short local PUP define.
24 *
25 * Due to errata "TXD floats when CTS is inactive" pullups are always
26 * on for TXD pins.
27 */
28 #ifdef CONFIG_AT91_GPIO_PULLUP
29 # define PUP CONFIG_AT91_GPIO_PULLUP
30 #else
31 # define PUP 0
32 #endif
33
34 void at91_serial0_hw_init(void)
35 {
36 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
37
38 at91_set_a_periph(AT91_PIO_PORTA, 26, 1); /* TXD0 */
39 at91_set_a_periph(AT91_PIO_PORTA, 27, PUP); /* RXD0 */
40 writel(1 << ATMEL_ID_USART0, &pmc->pcer);
41 }
42
43 void at91_serial1_hw_init(void)
44 {
45 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
46
47 at91_set_a_periph(AT91_PIO_PORTD, 0, 1); /* TXD1 */
48 at91_set_a_periph(AT91_PIO_PORTD, 1, PUP); /* RXD1 */
49 writel(1 << ATMEL_ID_USART1, &pmc->pcer);
50 }
51
52 void at91_serial2_hw_init(void)
53 {
54 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
55
56 at91_set_a_periph(AT91_PIO_PORTD, 2, 1); /* TXD2 */
57 at91_set_a_periph(AT91_PIO_PORTD, 3, PUP); /* RXD2 */
58 writel(1 << ATMEL_ID_USART2, &pmc->pcer);
59 }
60
61 void at91_seriald_hw_init(void)
62 {
63 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
64
65 at91_set_a_periph(AT91_PIO_PORTC, 30, PUP); /* DRXD */
66 at91_set_a_periph(AT91_PIO_PORTC, 31, 1); /* DTXD */
67 writel(1 << ATMEL_ID_SYS, &pmc->pcer);
68 }
69
70 #if defined(CONFIG_HAS_DATAFLASH) || defined(CONFIG_ATMEL_SPI)
71 void at91_spi0_hw_init(unsigned long cs_mask)
72 {
73 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
74
75 at91_set_b_periph(AT91_PIO_PORTA, 0, PUP); /* SPI0_MISO */
76 at91_set_b_periph(AT91_PIO_PORTA, 1, PUP); /* SPI0_MOSI */
77 at91_set_b_periph(AT91_PIO_PORTA, 2, PUP); /* SPI0_SPCK */
78
79 /* Enable clock */
80 writel(1 << ATMEL_ID_SPI0, &pmc->pcer);
81
82 if (cs_mask & (1 << 0)) {
83 at91_set_b_periph(AT91_PIO_PORTA, 5, 1);
84 }
85 if (cs_mask & (1 << 1)) {
86 at91_set_b_periph(AT91_PIO_PORTA, 3, 1);
87 }
88 if (cs_mask & (1 << 2)) {
89 at91_set_b_periph(AT91_PIO_PORTA, 4, 1);
90 }
91 if (cs_mask & (1 << 3)) {
92 at91_set_b_periph(AT91_PIO_PORTB, 11, 1);
93 }
94 if (cs_mask & (1 << 4)) {
95 at91_set_pio_output(AT91_PIO_PORTA, 5, 1);
96 }
97 if (cs_mask & (1 << 5)) {
98 at91_set_pio_output(AT91_PIO_PORTA, 3, 1);
99 }
100 if (cs_mask & (1 << 6)) {
101 at91_set_pio_output(AT91_PIO_PORTA, 4, 1);
102 }
103 if (cs_mask & (1 << 7)) {
104 at91_set_pio_output(AT91_PIO_PORTB, 11, 1);
105 }
106 }
107
108 void at91_spi1_hw_init(unsigned long cs_mask)
109 {
110 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
111
112 at91_set_a_periph(AT91_PIO_PORTB, 12, PUP); /* SPI1_MISO */
113 at91_set_a_periph(AT91_PIO_PORTB, 13, PUP); /* SPI1_MOSI */
114 at91_set_a_periph(AT91_PIO_PORTB, 14, PUP); /* SPI1_SPCK */
115
116 /* Enable clock */
117 writel(1 << ATMEL_ID_SPI1, &pmc->pcer);
118
119 if (cs_mask & (1 << 0)) {
120 at91_set_a_periph(AT91_PIO_PORTB, 15, 1);
121 }
122 if (cs_mask & (1 << 1)) {
123 at91_set_a_periph(AT91_PIO_PORTB, 16, 1);
124 }
125 if (cs_mask & (1 << 2)) {
126 at91_set_a_periph(AT91_PIO_PORTB, 17, 1);
127 }
128 if (cs_mask & (1 << 3)) {
129 at91_set_a_periph(AT91_PIO_PORTB, 18, 1);
130 }
131 if (cs_mask & (1 << 4)) {
132 at91_set_pio_output(AT91_PIO_PORTB, 15, 1);
133 }
134 if (cs_mask & (1 << 5)) {
135 at91_set_pio_output(AT91_PIO_PORTB, 16, 1);
136 }
137 if (cs_mask & (1 << 6)) {
138 at91_set_pio_output(AT91_PIO_PORTB, 17, 1);
139 }
140 if (cs_mask & (1 << 7)) {
141 at91_set_pio_output(AT91_PIO_PORTB, 18, 1);
142 }
143 }
144 #endif
145
146 #ifdef CONFIG_MACB
147 void at91_macb_hw_init(void)
148 {
149 at91_set_a_periph(AT91_PIO_PORTE, 21, 0); /* ETXCK_EREFCK */
150 at91_set_b_periph(AT91_PIO_PORTC, 25, 0); /* ERXDV */
151 at91_set_a_periph(AT91_PIO_PORTE, 25, 0); /* ERX0 */
152 at91_set_a_periph(AT91_PIO_PORTE, 26, 0); /* ERX1 */
153 at91_set_a_periph(AT91_PIO_PORTE, 27, 0); /* ERXER */
154 at91_set_a_periph(AT91_PIO_PORTE, 28, 0); /* ETXEN */
155 at91_set_a_periph(AT91_PIO_PORTE, 23, 0); /* ETX0 */
156 at91_set_a_periph(AT91_PIO_PORTE, 24, 0); /* ETX1 */
157 at91_set_a_periph(AT91_PIO_PORTE, 30, 0); /* EMDIO */
158 at91_set_a_periph(AT91_PIO_PORTE, 29, 0); /* EMDC */
159
160 #ifndef CONFIG_RMII
161 at91_set_a_periph(AT91_PIO_PORTE, 22, 0); /* ECRS */
162 at91_set_b_periph(AT91_PIO_PORTC, 26, 0); /* ECOL */
163 at91_set_b_periph(AT91_PIO_PORTC, 22, 0); /* ERX2 */
164 at91_set_b_periph(AT91_PIO_PORTC, 23, 0); /* ERX3 */
165 at91_set_b_periph(AT91_PIO_PORTC, 27, 0); /* ERXCK */
166 at91_set_b_periph(AT91_PIO_PORTC, 20, 0); /* ETX2 */
167 at91_set_b_periph(AT91_PIO_PORTC, 21, 0); /* ETX3 */
168 at91_set_b_periph(AT91_PIO_PORTC, 24, 0); /* ETXER */
169 #endif
170 }
171 #endif
172
173 #ifdef CONFIG_USB_OHCI_NEW
174 void at91_uhp_hw_init(void)
175 {
176 /* Enable VBus on UHP ports */
177 at91_set_pio_output(AT91_PIO_PORTA, 21, 0);
178 at91_set_pio_output(AT91_PIO_PORTA, 24, 0);
179 }
180 #endif
181
182 #ifdef CONFIG_AT91_CAN
183 void at91_can_hw_init(void)
184 {
185 at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
186
187 at91_set_a_periph(AT91_PIO_PORTA, 13, 0); /* CAN_TX */
188 at91_set_a_periph(AT91_PIO_PORTA, 14, 1); /* CAN_RX */
189
190 /* Enable clock */
191 writel(1 << ATMEL_ID_CAN, &pmc->pcer);
192 }
193 #endif