target/linux/ar71xx/files/arch/mips/ath79/mach-arduino-yun.c

   1 /*
   2  *  Arduino Yun support
   3  *
   4  *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2015 Hauke Mehrtens <hauke@hauke-m.de>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify it
   8  *  under the terms of the GNU General Public License version 2 as published
   9  *  by the Free Software Foundation.
  10  */
  11
  12 #include "dev-eth.h"
  13 #include "dev-gpio-buttons.h"
  14 #include "dev-leds-gpio.h"
  15 #include "dev-m25p80.h"
  16 #include "dev-spi.h"
  17 #include "dev-usb.h"
  18 #include "dev-wmac.h"
  19 #include "machtypes.h"
  20 #include <asm/mach-ath79/ar71xx_regs.h>
  21 #include <asm/mach-ath79/ath79.h>
  22 #include <linux/gpio.h>
  23 #include "common.h"
  24
  25 // Uncomment to have reset on gpio18 instead of gipo7
  26 #define DS2_B
  27
  28 #define DS_GPIO_LED_WLAN                0
  29 #define DS_GPIO_LED_USB                 1
  30
  31 #define DS_GPIO_OE                      21
  32 #define DS_GPIO_AVR_RESET               18
  33
  34 // Maintained to have the console in the previous version of DS2 working
  35 #define DS_GPIO_AVR_RESET_DS2           7
  36
  37 #define DS_GPIO_OE2                     22
  38 #define DS_GPIO_UART_ENA                23
  39 #define DS_GPIO_CONF_BTN                20
  40
  41 #define DS_KEYS_POLL_INTERVAL           20      /* msecs */
  42 #define DS_KEYS_DEBOUNCE_INTERVAL       (3 * DS_KEYS_POLL_INTERVAL)
  43
  44 #define DS_MAC0_OFFSET                  0x0000
  45 #define DS_MAC1_OFFSET                  0x0006
  46 #define DS_CALDATA_OFFSET               0x1000
  47 #define DS_WMAC_MAC_OFFSET              0x1002
  48
  49
  50 static struct gpio_led ds_leds_gpio[] __initdata = {
  51         {
  52                 .name           = "arduino:white:usb",
  53                 .gpio           = DS_GPIO_LED_USB,
  54                 .active_low     = 0,
  55         },
  56         {
  57                 .name           = "arduino:blue:wlan",
  58                 .gpio           = DS_GPIO_LED_WLAN,
  59                 .active_low     = 0,
  60         },
  61 };
  62
  63 static struct gpio_keys_button ds_gpio_keys[] __initdata = {
  64         {
  65                 .desc           = "configuration button",
  66                 .type           = EV_KEY,
  67                 .code           = KEY_WPS_BUTTON,
  68                 .debounce_interval = DS_KEYS_DEBOUNCE_INTERVAL,
  69                 .gpio           = DS_GPIO_CONF_BTN,
  70                 .active_low     = 1,
  71         },
  72 };
  73
  74 static void __init ds_common_setup(void)
  75 {
  76         static u8 mac[6];
  77
  78         u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);
  79         ath79_register_m25p80(NULL);
  80
  81         if (ar93xx_wmac_read_mac_address(mac)) {
  82                 ath79_register_wmac(NULL, NULL);
  83         } else {
  84                 ath79_register_wmac(art + DS_CALDATA_OFFSET,
  85                                     art + DS_WMAC_MAC_OFFSET);
  86                 memcpy(mac, art + DS_WMAC_MAC_OFFSET, sizeof(mac));
  87         }
  88
  89         mac[3] |= 0x08;
  90         ath79_init_mac(ath79_eth0_data.mac_addr, mac, 0);
  91
  92         mac[3] &= 0xF7;
  93         ath79_init_mac(ath79_eth1_data.mac_addr, mac, 0);
  94         ath79_register_mdio(0, 0x0);
  95
  96         /* LAN ports */
  97         ath79_register_eth(1);
  98
  99         /* WAN port */
 100         ath79_register_eth(0);
 101 }
 102
 103 static void __init ds_setup(void)
 104 {
 105         u32 t;
 106
 107         ds_common_setup();
 108
 109         ath79_register_leds_gpio(-1, ARRAY_SIZE(ds_leds_gpio),
 110                                  ds_leds_gpio);
 111         ath79_register_gpio_keys_polled(-1, DS_KEYS_POLL_INTERVAL,
 112                                         ARRAY_SIZE(ds_gpio_keys),
 113                                         ds_gpio_keys);
 114         ath79_register_usb();
 115
 116         /* use the swtich_led directly form sysfs */
 117         ath79_gpio_function_disable(AR933X_GPIO_FUNC_ETH_SWITCH_LED0_EN |
 118                                                                 AR933X_GPIO_FUNC_ETH_SWITCH_LED1_EN |
 119                                                                 AR933X_GPIO_FUNC_ETH_SWITCH_LED2_EN |
 120                                                                 AR933X_GPIO_FUNC_ETH_SWITCH_LED3_EN |
 121                                                                 AR933X_GPIO_FUNC_ETH_SWITCH_LED4_EN);
 122
 123         //Disable the Function for some pins to have GPIO functionality active
 124         // GPIO6-7-8 and GPIO11
 125         ath79_gpio_function_setup(AR933X_GPIO_FUNC_JTAG_DISABLE | AR933X_GPIO_FUNC_I2S_MCK_EN, 0);
 126
 127         ath79_gpio_function2_setup(AR933X_GPIO_FUNC2_JUMPSTART_DISABLE, 0);
 128
 129         printk("Setting DogStick2 GPIO\n");
 130
 131         t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
 132         t |= AR933X_BOOTSTRAP_MDIO_GPIO_EN;
 133         ath79_reset_wr(AR933X_RESET_REG_BOOTSTRAP, t);
 134
 135         // Put the avr reset to high
 136         if (gpio_request_one(DS_GPIO_AVR_RESET_DS2,
 137             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "OE-1") != 0)
 138                 printk("Error setting GPIO OE\n");
 139         gpio_unexport(DS_GPIO_AVR_RESET_DS2);
 140         gpio_free(DS_GPIO_AVR_RESET_DS2);
 141
 142         // enable OE of level shifter
 143         if (gpio_request_one(DS_GPIO_OE,
 144             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "OE-1") != 0)
 145                 printk("Error setting GPIO OE\n");
 146
 147         if (gpio_request_one(DS_GPIO_UART_ENA,
 148             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "UART-ENA") != 0)
 149                 printk("Error setting GPIO Uart Enable\n");
 150
 151         // enable OE of level shifter
 152         if (gpio_request_one(DS_GPIO_OE2,
 153             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "OE-2") != 0)
 154                 printk("Error setting GPIO OE2\n");
 155 }
 156
 157 MIPS_MACHINE(ATH79_MACH_ARDUINO_YUN, "Yun", "Arduino Yun", ds_setup);