1 /*
2  * Board functions for Compulab CM-T335 board
3  *
4  * Copyright (C) 2013, Compulab Ltd - http://compulab.co.il/
5  *
6  * Author: Ilya Ledvich <ilya@compulab.co.il>
7  *
8  * SPDX-License-Identifier:	GPL-2.0+
9  */
10 
11 #include <common.h>
12 #include <errno.h>
13 #include <miiphy.h>
14 #include <cpsw.h>
15 
16 #include <asm/arch/sys_proto.h>
17 #include <asm/arch/hardware_am33xx.h>
18 #include <asm/io.h>
19 #include <asm/gpio.h>
20 
21 #include "../common/eeprom.h"
22 
23 DECLARE_GLOBAL_DATA_PTR;
24 
25 /*
26  * Basic board specific setup.  Pinmux has been handled already.
27  */
28 int board_init(void)
29 {
30 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
31 
32 	gpmc_init();
33 
34 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
35 	status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
36 #endif
37 	return 0;
38 }
39 
40 #if defined (CONFIG_DRIVER_TI_CPSW) && !defined(CONFIG_SPL_BUILD)
41 static void cpsw_control(int enabled)
42 {
43 	/* VTP can be added here */
44 	return;
45 }
46 
47 static struct cpsw_slave_data cpsw_slave = {
48 	.slave_reg_ofs	= 0x208,
49 	.sliver_reg_ofs	= 0xd80,
50 	.phy_addr	= 0,
51 	.phy_if		= PHY_INTERFACE_MODE_RGMII,
52 };
53 
54 static struct cpsw_platform_data cpsw_data = {
55 	.mdio_base		= CPSW_MDIO_BASE,
56 	.cpsw_base		= CPSW_BASE,
57 	.mdio_div		= 0xff,
58 	.channels		= 8,
59 	.cpdma_reg_ofs		= 0x800,
60 	.slaves			= 1,
61 	.slave_data		= &cpsw_slave,
62 	.ale_reg_ofs		= 0xd00,
63 	.ale_entries		= 1024,
64 	.host_port_reg_ofs	= 0x108,
65 	.hw_stats_reg_ofs	= 0x900,
66 	.bd_ram_ofs		= 0x2000,
67 	.mac_control		= (1 << 5),
68 	.control		= cpsw_control,
69 	.host_port_num		= 0,
70 	.version		= CPSW_CTRL_VERSION_2,
71 };
72 
73 /* PHY reset GPIO */
74 #define GPIO_PHY_RST		GPIO_PIN(3, 7)
75 
76 static void board_phy_init(void)
77 {
78 	gpio_request(GPIO_PHY_RST, "phy_rst");
79 	gpio_direction_output(GPIO_PHY_RST, 0);
80 	mdelay(2);
81 	gpio_set_value(GPIO_PHY_RST, 1);
82 	mdelay(2);
83 }
84 
85 static void get_efuse_mac_addr(uchar *enetaddr)
86 {
87 	uint32_t mac_hi, mac_lo;
88 	struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
89 
90 	mac_lo = readl(&cdev->macid0l);
91 	mac_hi = readl(&cdev->macid0h);
92 	enetaddr[0] = mac_hi & 0xFF;
93 	enetaddr[1] = (mac_hi & 0xFF00) >> 8;
94 	enetaddr[2] = (mac_hi & 0xFF0000) >> 16;
95 	enetaddr[3] = (mac_hi & 0xFF000000) >> 24;
96 	enetaddr[4] = mac_lo & 0xFF;
97 	enetaddr[5] = (mac_lo & 0xFF00) >> 8;
98 }
99 
100 /*
101  * Routine: handle_mac_address
102  * Description: prepare MAC address for on-board Ethernet.
103  */
104 static int handle_mac_address(void)
105 {
106 	uchar enetaddr[6];
107 	int rv;
108 
109 	rv = eth_getenv_enetaddr("ethaddr", enetaddr);
110 	if (rv)
111 		return 0;
112 
113 	rv = cl_eeprom_read_mac_addr(enetaddr, CONFIG_SYS_I2C_EEPROM_BUS);
114 	if (rv)
115 		get_efuse_mac_addr(enetaddr);
116 
117 	if (!is_valid_ethaddr(enetaddr))
118 		return -1;
119 
120 	return eth_setenv_enetaddr("ethaddr", enetaddr);
121 }
122 
123 #define AR8051_PHY_DEBUG_ADDR_REG	0x1d
124 #define AR8051_PHY_DEBUG_DATA_REG	0x1e
125 #define AR8051_DEBUG_RGMII_CLK_DLY_REG	0x5
126 #define AR8051_RGMII_TX_CLK_DLY		0x100
127 
128 int board_eth_init(bd_t *bis)
129 {
130 	int rv, n = 0;
131 	const char *devname;
132 	struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
133 
134 	rv = handle_mac_address();
135 	if (rv)
136 		printf("No MAC address found!\n");
137 
138 	writel(RGMII_MODE_ENABLE | RGMII_INT_DELAY, &cdev->miisel);
139 
140 	board_phy_init();
141 
142 	rv = cpsw_register(&cpsw_data);
143 	if (rv < 0)
144 		printf("Error %d registering CPSW switch\n", rv);
145 	else
146 		n += rv;
147 
148 	/*
149 	 * CPSW RGMII Internal Delay Mode is not supported in all PVT
150 	 * operating points.  So we must set the TX clock delay feature
151 	 * in the AR8051 PHY.  Since we only support a single ethernet
152 	 * device, we only do this for the first instance.
153 	 */
154 	devname = miiphy_get_current_dev();
155 
156 	miiphy_write(devname, 0x0, AR8051_PHY_DEBUG_ADDR_REG,
157 		     AR8051_DEBUG_RGMII_CLK_DLY_REG);
158 	miiphy_write(devname, 0x0, AR8051_PHY_DEBUG_DATA_REG,
159 		     AR8051_RGMII_TX_CLK_DLY);
160 	return n;
161 }
162 #endif /* CONFIG_DRIVER_TI_CPSW && !CONFIG_SPL_BUILD */
163