board/buffalo/lsxl/lsxl.c

   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 <net.h>
  13 #include <malloc.h>
  14 #include <netdev.h>
  15 #include <miiphy.h>
  16 #include <asm/arch/kirkwood.h>
  17 #include <asm/arch/cpu.h>
  18 #include <asm/arch/mpp.h>
  19 #include <asm/arch/gpio.h>
  20 #include <spi_flash.h>
  21
  22 #include "lsxl.h"
  23
  24 /*
  25  * Rescue mode
  26  *
  27  * Selected by holding the push button for 3 seconds, while powering on
  28  * the device.
  29  *
  30  * These linkstations don't have a (populated) serial port. There is no
  31  * way to access an (unmodified) board other than using the netconsole. If
  32  * you want to recover from a bad environment setting or an empty environment,
  33  * you can do this only with a working network connection. Therefore, a random
  34  * ethernet address is generated if none is set and a DHCP request is sent.
  35  * After a successful DHCP response is received, the network settings are
  36  * configured and the ncip is unset. Therefore, all netconsole packets are
  37  * broadcasted.
  38  * Additionally, the bootsource is set to 'rescue'.
  39  */
  40
  41 #ifndef CONFIG_ENV_OVERWRITE
  42 # error "You need to set CONFIG_ENV_OVERWRITE"
  43 #endif
  44
  45 DECLARE_GLOBAL_DATA_PTR;
  46
  47 int board_early_init_f(void)
  48 {
  49         /*
  50          * default gpio configuration
  51          * There are maximum 64 gpios controlled through 2 sets of registers
  52          * the below configuration configures mainly initial LED status
  53          */
  54         kw_config_gpio(LSXL_OE_VAL_LOW,
  55                         LSXL_OE_VAL_HIGH,
  56                         LSXL_OE_LOW, LSXL_OE_HIGH);
  57
  58         /*
  59          * Multi-Purpose Pins Functionality configuration
  60          * These strappings are taken from the original vendor uboot port.
  61          */
  62         static const u32 kwmpp_config[] = {
  63                 MPP0_SPI_SCn,
  64                 MPP1_SPI_MOSI,
  65                 MPP2_SPI_SCK,
  66                 MPP3_SPI_MISO,
  67                 MPP4_UART0_RXD,
  68                 MPP5_UART0_TXD,
  69                 MPP6_SYSRST_OUTn,
  70                 MPP7_GPO,
  71                 MPP8_GPIO,
  72                 MPP9_GPIO,
  73                 MPP10_GPO,              /* HDD power */
  74                 MPP11_GPIO,             /* USB Vbus enable */
  75                 MPP12_SD_CLK,
  76                 MPP13_SD_CMD,
  77                 MPP14_SD_D0,
  78                 MPP15_SD_D1,
  79                 MPP16_SD_D2,
  80                 MPP17_SD_D3,
  81                 MPP18_GPO,              /* fan speed high */
  82                 MPP19_GPO,              /* fan speed low */
  83                 MPP20_GE1_0,
  84                 MPP21_GE1_1,
  85                 MPP22_GE1_2,
  86                 MPP23_GE1_3,
  87                 MPP24_GE1_4,
  88                 MPP25_GE1_5,
  89                 MPP26_GE1_6,
  90                 MPP27_GE1_7,
  91                 MPP28_GPIO,
  92                 MPP29_GPIO,
  93                 MPP30_GE1_10,
  94                 MPP31_GE1_11,
  95                 MPP32_GE1_12,
  96                 MPP33_GE1_13,
  97                 MPP34_GPIO,
  98                 MPP35_GPIO,
  99                 MPP36_GPIO,             /* function LED */
 100                 MPP37_GPIO,             /* alarm LED */
 101                 MPP38_GPIO,             /* info LED */
 102                 MPP39_GPIO,             /* power LED */
 103                 MPP40_GPIO,             /* fan alarm */
 104                 MPP41_GPIO,             /* funtion button */
 105                 MPP42_GPIO,             /* power switch */
 106                 MPP43_GPIO,             /* power auto switch */
 107                 MPP44_GPIO,
 108                 MPP45_GPIO,
 109                 MPP46_GPIO,
 110                 MPP47_GPIO,
 111                 MPP48_GPIO,             /* function red LED */
 112                 MPP49_GPIO,
 113                 0
 114         };
 115
 116         kirkwood_mpp_conf(kwmpp_config, NULL);
 117
 118         return 0;
 119 }
 120
 121 #define LED_OFF             0
 122 #define LED_ALARM_ON        1
 123 #define LED_ALARM_BLINKING  2
 124 #define LED_POWER_ON        3
 125 #define LED_POWER_BLINKING  4
 126 #define LED_INFO_ON         5
 127 #define LED_INFO_BLINKING   6
 128
 129 static void __set_led(int blink_alarm, int blink_info, int blink_power,
 130                 int value_alarm, int value_info, int value_power)
 131 {
 132         kw_gpio_set_blink(GPIO_ALARM_LED, blink_alarm);
 133         kw_gpio_set_blink(GPIO_INFO_LED, blink_info);
 134         kw_gpio_set_blink(GPIO_POWER_LED, blink_power);
 135         kw_gpio_set_value(GPIO_ALARM_LED, value_alarm);
 136         kw_gpio_set_value(GPIO_INFO_LED, value_info);
 137         kw_gpio_set_value(GPIO_POWER_LED, value_power);
 138 }
 139
 140 static void set_led(int state)
 141 {
 142         switch (state) {
 143         case LED_OFF:
 144                 __set_led(0, 0, 0, 1, 1, 1);
 145                 break;
 146         case LED_ALARM_ON:
 147                 __set_led(0, 0, 0, 0, 1, 1);
 148                 break;
 149         case LED_ALARM_BLINKING:
 150                 __set_led(1, 0, 0, 1, 1, 1);
 151                 break;
 152         case LED_INFO_ON:
 153                 __set_led(0, 0, 0, 1, 0, 1);
 154                 break;
 155         case LED_INFO_BLINKING:
 156                 __set_led(0, 1, 0, 1, 1, 1);
 157                 break;
 158         case LED_POWER_ON:
 159                 __set_led(0, 0, 0, 1, 1, 0);
 160                 break;
 161         case LED_POWER_BLINKING:
 162                 __set_led(0, 0, 1, 1, 1, 1);
 163                 break;
 164         }
 165 }
 166
 167 int board_init(void)
 168 {
 169         /* address of boot parameters */
 170         gd->bd->bi_boot_params = kw_sdram_bar(0) + 0x100;
 171
 172         set_led(LED_POWER_BLINKING);
 173
 174         return 0;
 175 }
 176
 177 #ifdef CONFIG_MISC_INIT_R
 178 static void check_power_switch(void)
 179 {
 180         if (kw_gpio_get_value(GPIO_POWER_SWITCH)) {
 181                 /* turn off fan, HDD and USB power */
 182                 kw_gpio_set_value(GPIO_HDD_POWER, 0);
 183                 kw_gpio_set_value(GPIO_USB_VBUS, 0);
 184                 kw_gpio_set_value(GPIO_FAN_HIGH, 1);
 185                 kw_gpio_set_value(GPIO_FAN_LOW, 1);
 186                 set_led(LED_OFF);
 187
 188                 /* loop until released */
 189                 while (kw_gpio_get_value(GPIO_POWER_SWITCH))
 190                         ;
 191
 192                 /* turn power on again */
 193                 kw_gpio_set_value(GPIO_HDD_POWER, 1);
 194                 kw_gpio_set_value(GPIO_USB_VBUS, 1);
 195                 kw_gpio_set_value(GPIO_FAN_HIGH, 0);
 196                 kw_gpio_set_value(GPIO_FAN_LOW, 0);
 197                 set_led(LED_POWER_BLINKING);
 198         }
 199 }
 200
 201 void check_enetaddr(void)
 202 {
 203         uchar enetaddr[6];
 204
 205         if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
 206                 /* signal unset/invalid ethaddr to user */
 207                 set_led(LED_INFO_BLINKING);
 208         }
 209 }
 210
 211 static void erase_environment(void)
 212 {
 213         struct spi_flash *flash;
 214
 215         printf("Erasing environment..\n");
 216         flash = spi_flash_probe(0, 0, 1000000, SPI_MODE_3);
 217         if (!flash) {
 218                 printf("Erasing flash failed\n");
 219                 return;
 220         }
 221
 222         spi_flash_erase(flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE);
 223         spi_flash_free(flash);
 224         do_reset(NULL, 0, 0, NULL);
 225 }
 226
 227 static void rescue_mode(void)
 228 {
 229         uchar enetaddr[6];
 230
 231         printf("Entering rescue mode..\n");
 232 #ifdef CONFIG_RANDOM_MACADDR
 233         if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
 234                 eth_random_enetaddr(enetaddr);
 235                 if (eth_setenv_enetaddr("ethaddr", enetaddr)) {
 236                         printf("Failed to set ethernet address\n");
 237                                 set_led(LED_ALARM_BLINKING);
 238                         return;
 239                 }
 240         }
 241 #endif
 242         setenv("bootsource", "rescue");
 243 }
 244
 245 static void check_push_button(void)
 246 {
 247         int i = 0;
 248
 249         while (!kw_gpio_get_value(GPIO_FUNC_BUTTON)) {
 250                 udelay(100000);
 251                 i++;
 252
 253                 if (i == 10)
 254                         set_led(LED_INFO_ON);
 255
 256                 if (i >= 100) {
 257                         set_led(LED_INFO_BLINKING);
 258                         break;
 259                 }
 260         }
 261
 262         if (i >= 100)
 263                 erase_environment();
 264         else if (i >= 10)
 265                 rescue_mode();
 266 }
 267
 268 int misc_init_r(void)
 269 {
 270         check_power_switch();
 271         check_enetaddr();
 272         check_push_button();
 273
 274         return 0;
 275 }
 276 #endif
 277
 278 #ifdef CONFIG_SHOW_BOOT_PROGRESS
 279 void show_boot_progress(int progress)
 280 {
 281         if (progress > 0)
 282                 return;
 283
 284         /* this is not an error, eg. bootp with autoload=no will trigger this */
 285         if (progress == -BOOTSTAGE_ID_NET_LOADED)
 286                 return;
 287
 288         set_led(LED_ALARM_BLINKING);
 289 }
 290 #endif