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