1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * am3517evm.c - board file for TI's AM3517 family of devices.
4  *
5  * Author: Vaibhav Hiremath <hvaibhav@ti.com>
6  *
7  * Based on ti/evm/evm.c
8  *
9  * Copyright (C) 2010
10  * Texas Instruments Incorporated - http://www.ti.com/
11  */
12 
13 #include <common.h>
14 #include <dm.h>
15 #include <ns16550.h>
16 #include <asm/io.h>
17 #include <asm/omap_musb.h>
18 #include <asm/arch/am35x_def.h>
19 #include <asm/arch/mem.h>
20 #include <asm/arch/mux.h>
21 #include <asm/arch/sys_proto.h>
22 #include <asm/arch/mmc_host_def.h>
23 #include <asm/arch/musb.h>
24 #include <asm/mach-types.h>
25 #include <linux/errno.h>
26 #include <asm/gpio.h>
27 #include <linux/usb/ch9.h>
28 #include <linux/usb/gadget.h>
29 #include <linux/usb/musb.h>
30 #include <i2c.h>
31 #include <netdev.h>
32 #include "am3517evm.h"
33 
34 DECLARE_GLOBAL_DATA_PTR;
35 
36 #define AM3517_IP_SW_RESET	0x48002598
37 #define CPGMACSS_SW_RST		(1 << 1)
38 #define PHY_GPIO		30
39 
40 
41 /*
42  * Routine: board_init
43  * Description: Early hardware init.
44  */
45 int board_init(void)
46 {
47 	gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
48 	/* board id for Linux */
49 	gd->bd->bi_arch_number = MACH_TYPE_OMAP3517EVM;
50 	/* boot param addr */
51 	gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
52 
53 	return 0;
54 }
55 
56 #ifdef CONFIG_USB_MUSB_AM35X
57 static struct musb_hdrc_config musb_config = {
58 	.multipoint     = 1,
59 	.dyn_fifo       = 1,
60 	.num_eps        = 16,
61 	.ram_bits       = 12,
62 };
63 
64 static struct omap_musb_board_data musb_board_data = {
65 	.set_phy_power		= am35x_musb_phy_power,
66 	.clear_irq		= am35x_musb_clear_irq,
67 	.reset			= am35x_musb_reset,
68 };
69 
70 static struct musb_hdrc_platform_data musb_plat = {
71 #if defined(CONFIG_USB_MUSB_HOST)
72 	.mode           = MUSB_HOST,
73 #elif defined(CONFIG_USB_MUSB_GADGET)
74 	.mode		= MUSB_PERIPHERAL,
75 #else
76 #error "Please define either CONFIG_USB_MUSB_HOST or CONFIG_USB_MUSB_GADGET"
77 #endif
78 	.config         = &musb_config,
79 	.power          = 250,
80 	.platform_ops	= &am35x_ops,
81 	.board_data	= &musb_board_data,
82 };
83 
84 static void am3517_evm_musb_init(void)
85 {
86 	/*
87 	 * Set up USB clock/mode in the DEVCONF2 register.
88 	 * USB2.0 PHY reference clock is 13 MHz
89 	 */
90 	clrsetbits_le32(&am35x_scm_general_regs->devconf2,
91 			CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE,
92 			CONF2_REFFREQ_13MHZ | CONF2_SESENDEN |
93 			CONF2_VBDTCTEN | CONF2_DATPOL);
94 
95 	musb_register(&musb_plat, &musb_board_data,
96 			(void *)AM35XX_IPSS_USBOTGSS_BASE);
97 }
98 #else
99 #define am3517_evm_musb_init() do {} while (0)
100 #endif
101 
102 /*
103  * Routine: misc_init_r
104  * Description: Init i2c, ethernet, etc... (done here so udelay works)
105  */
106 int misc_init_r(void)
107 {
108 	volatile unsigned int ctr;
109 	u32 reset;
110 
111 #ifdef CONFIG_SYS_I2C_OMAP24XX
112 	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
113 #endif
114 
115 	omap_die_id_display();
116 
117 	am3517_evm_musb_init();
118 
119 	if (gpio_request(PHY_GPIO, "gpio_30") == 0) {
120 		/* activate PHY reset */
121 		gpio_direction_output(PHY_GPIO, 0);
122 		gpio_set_value(PHY_GPIO, 0);
123 
124 		ctr  = 0;
125 		do {
126 			udelay(1000);
127 			ctr++;
128 		} while (ctr < 300);
129 
130 		/* deactivate PHY reset */
131 		gpio_set_value(PHY_GPIO, 1);
132 
133 		/* allow the PHY to stabilize and settle down */
134 		ctr = 0;
135 		do {
136 			udelay(1000);
137 			ctr++;
138 		} while (ctr < 300);
139 
140 		/* ensure that the module is out of reset */
141 		reset = readl(AM3517_IP_SW_RESET);
142 		reset &= (~CPGMACSS_SW_RST);
143 		writel(reset, AM3517_IP_SW_RESET);
144 
145 		/* Free requested GPIO */
146 		gpio_free(PHY_GPIO);
147 	}
148 
149 	return 0;
150 }
151 
152 /*
153  * Routine: set_muxconf_regs
154  * Description: Setting up the configuration Mux registers specific to the
155  *		hardware. Many pins need to be moved from protect to primary
156  *		mode.
157  */
158 void set_muxconf_regs(void)
159 {
160 	MUX_AM3517EVM();
161 }
162 
163 #if defined(CONFIG_MMC)
164 int board_mmc_init(bd_t *bis)
165 {
166 	return omap_mmc_init(0, 0, 0, -1, -1);
167 }
168 #endif
169 
170 #if defined(CONFIG_USB_ETHER) && defined(CONFIG_USB_MUSB_GADGET)
171 int board_eth_init(bd_t *bis)
172 {
173 	int rv, n = 0;
174 
175 	rv = cpu_eth_init(bis);
176 	if (rv > 0)
177 		n += rv;
178 
179 	rv = usb_eth_initialize(bis);
180 	if (rv > 0)
181 		n += rv;
182 
183 	return n;
184 }
185 #endif
186