xref: /openbmc/u-boot/board/buffalo/lsxl/lsxl.c (revision d024236e5a31a2b4b82cbcc98b31b8170fc88d28)
1 /*
2  * Copyright (c) 2012 Michael Walle
3  * Michael Walle <michael@walle.cc>
4  *
5  * Based on sheevaplug/sheevaplug.c by
6  *   Marvell Semiconductor <www.marvell.com>
7  *
8  * SPDX-License-Identifier:	GPL-2.0+
9  */
10 
11 #include <common.h>
12 #include <environment.h>
13 #include <net.h>
14 #include <malloc.h>
15 #include <netdev.h>
16 #include <miiphy.h>
17 #include <spi.h>
18 #include <spi_flash.h>
19 #include <asm/arch/soc.h>
20 #include <asm/arch/cpu.h>
21 #include <asm/arch/mpp.h>
22 #include <asm/arch/gpio.h>
23 
24 #include "lsxl.h"
25 
26 /*
27  * Rescue mode
28  *
29  * Selected by holding the push button for 3 seconds, while powering on
30  * the device.
31  *
32  * These linkstations don't have a (populated) serial port. There is no
33  * way to access an (unmodified) board other than using the netconsole. If
34  * you want to recover from a bad environment setting or an empty environment,
35  * you can do this only with a working network connection. Therefore, a random
36  * ethernet address is generated if none is set and a DHCP request is sent.
37  * After a successful DHCP response is received, the network settings are
38  * configured and the ncip is unset. Therefore, all netconsole packets are
39  * broadcasted.
40  * Additionally, the bootsource is set to 'rescue'.
41  */
42 
43 #ifndef CONFIG_ENV_OVERWRITE
44 # error "You need to set CONFIG_ENV_OVERWRITE"
45 #endif
46 
47 DECLARE_GLOBAL_DATA_PTR;
48 
49 int board_early_init_f(void)
50 {
51 	/*
52 	 * default gpio configuration
53 	 * There are maximum 64 gpios controlled through 2 sets of registers
54 	 * the below configuration configures mainly initial LED status
55 	 */
56 	mvebu_config_gpio(LSXL_OE_VAL_LOW,
57 			  LSXL_OE_VAL_HIGH,
58 			  LSXL_OE_LOW, LSXL_OE_HIGH);
59 
60 	/*
61 	 * Multi-Purpose Pins Functionality configuration
62 	 * These strappings are taken from the original vendor uboot port.
63 	 */
64 	static const u32 kwmpp_config[] = {
65 		MPP0_SPI_SCn,
66 		MPP1_SPI_MOSI,
67 		MPP2_SPI_SCK,
68 		MPP3_SPI_MISO,
69 		MPP4_UART0_RXD,
70 		MPP5_UART0_TXD,
71 		MPP6_SYSRST_OUTn,
72 		MPP7_GPO,
73 		MPP8_GPIO,
74 		MPP9_GPIO,
75 		MPP10_GPO,		/* HDD power */
76 		MPP11_GPIO,		/* USB Vbus enable */
77 		MPP12_SD_CLK,
78 		MPP13_SD_CMD,
79 		MPP14_SD_D0,
80 		MPP15_SD_D1,
81 		MPP16_SD_D2,
82 		MPP17_SD_D3,
83 		MPP18_GPO,		/* fan speed high */
84 		MPP19_GPO,		/* fan speed low */
85 		MPP20_GE1_0,
86 		MPP21_GE1_1,
87 		MPP22_GE1_2,
88 		MPP23_GE1_3,
89 		MPP24_GE1_4,
90 		MPP25_GE1_5,
91 		MPP26_GE1_6,
92 		MPP27_GE1_7,
93 		MPP28_GPIO,
94 		MPP29_GPIO,
95 		MPP30_GE1_10,
96 		MPP31_GE1_11,
97 		MPP32_GE1_12,
98 		MPP33_GE1_13,
99 		MPP34_GPIO,
100 		MPP35_GPIO,
101 		MPP36_GPIO,		/* function LED */
102 		MPP37_GPIO,		/* alarm LED */
103 		MPP38_GPIO,		/* info LED */
104 		MPP39_GPIO,		/* power LED */
105 		MPP40_GPIO,		/* fan alarm */
106 		MPP41_GPIO,		/* funtion button */
107 		MPP42_GPIO,		/* power switch */
108 		MPP43_GPIO,		/* power auto switch */
109 		MPP44_GPIO,
110 		MPP45_GPIO,
111 		MPP46_GPIO,
112 		MPP47_GPIO,
113 		MPP48_GPIO,		/* function red LED */
114 		MPP49_GPIO,
115 		0
116 	};
117 
118 	kirkwood_mpp_conf(kwmpp_config, NULL);
119 
120 	return 0;
121 }
122 
123 #define LED_OFF             0
124 #define LED_ALARM_ON        1
125 #define LED_ALARM_BLINKING  2
126 #define LED_POWER_ON        3
127 #define LED_POWER_BLINKING  4
128 #define LED_INFO_ON         5
129 #define LED_INFO_BLINKING   6
130 
131 static void __set_led(int blink_alarm, int blink_info, int blink_power,
132 		int value_alarm, int value_info, int value_power)
133 {
134 	kw_gpio_set_blink(GPIO_ALARM_LED, blink_alarm);
135 	kw_gpio_set_blink(GPIO_INFO_LED, blink_info);
136 	kw_gpio_set_blink(GPIO_POWER_LED, blink_power);
137 	kw_gpio_set_value(GPIO_ALARM_LED, value_alarm);
138 	kw_gpio_set_value(GPIO_INFO_LED, value_info);
139 	kw_gpio_set_value(GPIO_POWER_LED, value_power);
140 }
141 
142 static void set_led(int state)
143 {
144 	switch (state) {
145 	case LED_OFF:
146 		__set_led(0, 0, 0, 1, 1, 1);
147 		break;
148 	case LED_ALARM_ON:
149 		__set_led(0, 0, 0, 0, 1, 1);
150 		break;
151 	case LED_ALARM_BLINKING:
152 		__set_led(1, 0, 0, 1, 1, 1);
153 		break;
154 	case LED_INFO_ON:
155 		__set_led(0, 0, 0, 1, 0, 1);
156 		break;
157 	case LED_INFO_BLINKING:
158 		__set_led(0, 1, 0, 1, 1, 1);
159 		break;
160 	case LED_POWER_ON:
161 		__set_led(0, 0, 0, 1, 1, 0);
162 		break;
163 	case LED_POWER_BLINKING:
164 		__set_led(0, 0, 1, 1, 1, 1);
165 		break;
166 	}
167 }
168 
169 int board_init(void)
170 {
171 	/* address of boot parameters */
172 	gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
173 
174 	set_led(LED_POWER_BLINKING);
175 
176 	return 0;
177 }
178 
179 #ifdef CONFIG_MISC_INIT_R
180 static void check_power_switch(void)
181 {
182 	if (kw_gpio_get_value(GPIO_POWER_SWITCH)) {
183 		/* turn off fan, HDD and USB power */
184 		kw_gpio_set_value(GPIO_HDD_POWER, 0);
185 		kw_gpio_set_value(GPIO_USB_VBUS, 0);
186 		kw_gpio_set_value(GPIO_FAN_HIGH, 1);
187 		kw_gpio_set_value(GPIO_FAN_LOW, 1);
188 		set_led(LED_OFF);
189 
190 		/* loop until released */
191 		while (kw_gpio_get_value(GPIO_POWER_SWITCH))
192 			;
193 
194 		/* turn power on again */
195 		kw_gpio_set_value(GPIO_HDD_POWER, 1);
196 		kw_gpio_set_value(GPIO_USB_VBUS, 1);
197 		kw_gpio_set_value(GPIO_FAN_HIGH, 0);
198 		kw_gpio_set_value(GPIO_FAN_LOW, 0);
199 		set_led(LED_POWER_BLINKING);
200 	}
201 }
202 
203 void check_enetaddr(void)
204 {
205 	uchar enetaddr[6];
206 
207 	if (!eth_env_get_enetaddr("ethaddr", enetaddr)) {
208 		/* signal unset/invalid ethaddr to user */
209 		set_led(LED_INFO_BLINKING);
210 	}
211 }
212 
213 static void erase_environment(void)
214 {
215 	struct spi_flash *flash;
216 
217 	printf("Erasing environment..\n");
218 	flash = spi_flash_probe(0, 0, 1000000, SPI_MODE_3);
219 	if (!flash) {
220 		printf("Erasing flash failed\n");
221 		return;
222 	}
223 
224 	spi_flash_erase(flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE);
225 	spi_flash_free(flash);
226 	do_reset(NULL, 0, 0, NULL);
227 }
228 
229 static void rescue_mode(void)
230 {
231 	printf("Entering rescue mode..\n");
232 	env_set("bootsource", "rescue");
233 }
234 
235 static void check_push_button(void)
236 {
237 	int i = 0;
238 
239 	while (!kw_gpio_get_value(GPIO_FUNC_BUTTON)) {
240 		udelay(100000);
241 		i++;
242 
243 		if (i == 10)
244 			set_led(LED_INFO_ON);
245 
246 		if (i >= 100) {
247 			set_led(LED_INFO_BLINKING);
248 			break;
249 		}
250 	}
251 
252 	if (i >= 100)
253 		erase_environment();
254 	else if (i >= 10)
255 		rescue_mode();
256 }
257 
258 int misc_init_r(void)
259 {
260 	check_power_switch();
261 	check_enetaddr();
262 	check_push_button();
263 
264 	return 0;
265 }
266 #endif
267 
268 #ifdef CONFIG_SHOW_BOOT_PROGRESS
269 void show_boot_progress(int progress)
270 {
271 	if (progress > 0)
272 		return;
273 
274 	/* this is not an error, eg. bootp with autoload=no will trigger this */
275 	if (progress == -BOOTSTAGE_ID_NET_LOADED)
276 		return;
277 
278 	set_led(LED_ALARM_BLINKING);
279 }
280 #endif
281