1 /*
2  * Bluewater Systems Snapper 9260/9G20 modules
3  *
4  * (C) Copyright 2011 Bluewater Systems
5  *   Author: Andre Renaud <andre@bluewatersys.com>
6  *   Author: Ryan Mallon <ryan@bluewatersys.com>
7  *
8  * SPDX-License-Identifier:	GPL-2.0+
9  */
10 
11 #include <common.h>
12 #include <dm.h>
13 #include <asm/io.h>
14 #include <asm/gpio.h>
15 #include <asm/mach-types.h>
16 #include <asm/arch/at91sam9260_matrix.h>
17 #include <asm/arch/at91sam9_smc.h>
18 #include <asm/arch/at91_common.h>
19 #include <asm/arch/clk.h>
20 #include <asm/arch/gpio.h>
21 #include <asm/arch/atmel_serial.h>
22 #include <net.h>
23 #include <netdev.h>
24 #include <i2c.h>
25 #include <pca953x.h>
26 
27 DECLARE_GLOBAL_DATA_PTR;
28 
29 /* IO Expander pins */
30 #define IO_EXP_ETH_RESET	(0 << 1)
31 #define IO_EXP_ETH_POWER	(1 << 1)
32 
33 static void macb_hw_init(void)
34 {
35 	struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
36 
37 	at91_periph_clk_enable(ATMEL_ID_EMAC0);
38 
39 	/* Disable pull-ups to prevent PHY going into test mode */
40 	writel(pin_to_mask(AT91_PIN_PA14) |
41 	       pin_to_mask(AT91_PIN_PA15) |
42 	       pin_to_mask(AT91_PIN_PA18),
43 	       &pioa->pudr);
44 
45 	/* Power down ethernet */
46 	pca953x_set_dir(0x28, IO_EXP_ETH_POWER, PCA953X_DIR_OUT);
47 	pca953x_set_val(0x28, IO_EXP_ETH_POWER, 1);
48 
49 	/* Hold ethernet in reset */
50 	pca953x_set_dir(0x28, IO_EXP_ETH_RESET, PCA953X_DIR_OUT);
51 	pca953x_set_val(0x28, IO_EXP_ETH_RESET, 0);
52 
53 	/* Enable ethernet power */
54 	pca953x_set_val(0x28, IO_EXP_ETH_POWER, 0);
55 
56 	at91_phy_reset();
57 
58 	/* Bring the ethernet out of reset */
59 	pca953x_set_val(0x28, IO_EXP_ETH_RESET, 1);
60 
61 	/* The phy internal reset take 21ms */
62 	udelay(21 * 1000);
63 
64 	/* Re-enable pull-up */
65 	writel(pin_to_mask(AT91_PIN_PA14) |
66 	       pin_to_mask(AT91_PIN_PA15) |
67 	       pin_to_mask(AT91_PIN_PA18),
68 	       &pioa->puer);
69 
70 	at91_macb_hw_init();
71 }
72 
73 static void nand_hw_init(void)
74 {
75 	struct at91_smc *smc       = (struct at91_smc    *)ATMEL_BASE_SMC;
76 	struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
77 	unsigned long csa;
78 
79 	/* Enable CS3 as NAND/SmartMedia */
80 	csa = readl(&matrix->ebicsa);
81 	csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA;
82 	writel(csa, &matrix->ebicsa);
83 
84 	/* Configure SMC CS3 for NAND/SmartMedia */
85 	writel(AT91_SMC_SETUP_NWE(2) | AT91_SMC_SETUP_NCS_WR(0) |
86 	       AT91_SMC_SETUP_NRD(2) | AT91_SMC_SETUP_NCS_RD(0),
87 	       &smc->cs[3].setup);
88 	writel(AT91_SMC_PULSE_NWE(4) | AT91_SMC_PULSE_NCS_WR(4) |
89 	       AT91_SMC_PULSE_NRD(4) | AT91_SMC_PULSE_NCS_RD(4),
90 	       &smc->cs[3].pulse);
91 	writel(AT91_SMC_CYCLE_NWE(7) | AT91_SMC_CYCLE_NRD(7),
92 	       &smc->cs[3].cycle);
93 	writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
94 	       AT91_SMC_MODE_EXNW_DISABLE |
95 	       AT91_SMC_MODE_DBW_8 |
96 	       AT91_SMC_MODE_TDF_CYCLE(3),
97 	       &smc->cs[3].mode);
98 
99 	/* Configure RDY/BSY */
100 	gpio_request(CONFIG_SYS_NAND_READY_PIN, "nand_rdy");
101 	gpio_direction_input(CONFIG_SYS_NAND_READY_PIN);
102 
103 	/* Enable NandFlash */
104 	gpio_request(CONFIG_SYS_NAND_ENABLE_PIN, "nand_ce");
105 	gpio_direction_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
106 }
107 
108 int board_init(void)
109 {
110 	at91_periph_clk_enable(ATMEL_ID_PIOA);
111 	at91_periph_clk_enable(ATMEL_ID_PIOB);
112 	at91_periph_clk_enable(ATMEL_ID_PIOC);
113 
114 	/* The mach-type is the same for both Snapper 9260 and 9G20 */
115 	gd->bd->bi_arch_number = MACH_TYPE_SNAPPER_9260;
116 
117 	/* Address of boot parameters */
118 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
119 
120 	/* Initialise peripherals */
121 	at91_seriald_hw_init();
122 	i2c_set_bus_num(0);
123 	nand_hw_init();
124 	macb_hw_init();
125 
126 	return 0;
127 }
128 
129 int board_eth_init(bd_t *bis)
130 {
131 	return macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, 0x1f);
132 }
133 
134 int dram_init(void)
135 {
136 	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
137 				    CONFIG_SYS_SDRAM_SIZE);
138 	return 0;
139 }
140 
141 void reset_phy(void)
142 {
143 }
144 
145 static struct atmel_serial_platdata at91sam9260_serial_plat = {
146 	.base_addr = ATMEL_BASE_DBGU,
147 };
148 
149 U_BOOT_DEVICE(at91sam9260_serial) = {
150 	.name	= "serial_atmel",
151 	.platdata = &at91sam9260_serial_plat,
152 };
153