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/at91_pmc.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 
30 void at91_serial0_hw_init(void)
31 {
32 	at91_pmc_t	*pmc	= (at91_pmc_t *) ATMEL_BASE_PMC;
33 
34 	at91_set_a_periph(AT91_PIO_PORTA, 6, 1);		/* TXD0 */
35 	at91_set_a_periph(AT91_PIO_PORTA, 7, PUP);		/* RXD0 */
36 	writel(1 << ATMEL_ID_USART0, &pmc->pcer);
37 }
38 
39 void at91_serial1_hw_init(void)
40 {
41 	at91_pmc_t	*pmc	= (at91_pmc_t *) ATMEL_BASE_PMC;
42 
43 	at91_set_a_periph(AT91_PIO_PORTA, 11, 1);		/* TXD1 */
44 	at91_set_a_periph(AT91_PIO_PORTA, 12, PUP);		/* RXD1 */
45 	writel(1 << ATMEL_ID_USART1, &pmc->pcer);
46 }
47 
48 void at91_serial2_hw_init(void)
49 {
50 	at91_pmc_t	*pmc	= (at91_pmc_t *) ATMEL_BASE_PMC;
51 
52 	at91_set_a_periph(AT91_PIO_PORTA, 13, 1);		/* TXD2 */
53 	at91_set_a_periph(AT91_PIO_PORTA, 14, PUP);		/* RXD2 */
54 	writel(1 << ATMEL_ID_USART2, &pmc->pcer);
55 }
56 
57 void at91_seriald_hw_init(void)
58 {
59 	at91_pmc_t	*pmc	= (at91_pmc_t *) ATMEL_BASE_PMC;
60 
61 	at91_set_a_periph(AT91_PIO_PORTA, 21, PUP);		/* DRXD */
62 	at91_set_a_periph(AT91_PIO_PORTA, 22, 1);		/* DTXD */
63 	writel(1 << ATMEL_ID_SYS, &pmc->pcer);
64 }
65 
66 #if defined(CONFIG_HAS_DATAFLASH) || defined(CONFIG_ATMEL_SPI)
67 void at91_spi0_hw_init(unsigned long cs_mask)
68 {
69 	at91_pmc_t	*pmc	= (at91_pmc_t *) ATMEL_BASE_PMC;
70 
71 	at91_set_a_periph(AT91_PIO_PORTA, 25, PUP);	/* SPI0_MISO */
72 	at91_set_a_periph(AT91_PIO_PORTA, 26, PUP);	/* SPI0_MOSI */
73 	at91_set_a_periph(AT91_PIO_PORTA, 27, PUP);	/* SPI0_SPCK */
74 
75 	/* Enable clock */
76 	writel(1 << ATMEL_ID_SPI, &pmc->pcer);
77 
78 	if (cs_mask & (1 << 0)) {
79 		at91_set_a_periph(AT91_PIO_PORTA, 28, 1);
80 	}
81 	if (cs_mask & (1 << 1)) {
82 		at91_set_b_periph(AT91_PIO_PORTB, 7, 1);
83 	}
84 	if (cs_mask & (1 << 2)) {
85 		at91_set_a_periph(AT91_PIO_PORTD, 8, 1);
86 	}
87 	if (cs_mask & (1 << 3)) {
88 		at91_set_b_periph(AT91_PIO_PORTD, 9, 1);
89 	}
90 	if (cs_mask & (1 << 4)) {
91 		at91_set_pio_output(AT91_PIO_PORTA, 28, 1);
92 	}
93 	if (cs_mask & (1 << 5)) {
94 		at91_set_pio_output(AT91_PIO_PORTB, 7, 1);
95 	}
96 	if (cs_mask & (1 << 6)) {
97 		at91_set_pio_output(AT91_PIO_PORTD, 8, 1);
98 	}
99 	if (cs_mask & (1 << 7)) {
100 		at91_set_pio_output(AT91_PIO_PORTD, 9, 1);
101 	}
102 }
103 #endif
104