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 "common.h"
  23 #include "gpio.h"
  24 #include "linux/gpio.h"
  25
  26 // Uncomment to have reset on gpio18 instead of gipo7
  27 #define DS2_B
  28
  29 #define DS_GPIO_LED_WLAN                0
  30 #define DS_GPIO_LED_USB                 1
  31
  32 #define DS_GPIO_OE                      21
  33 #define DS_GPIO_AVR_RESET               18
  34
  35 // Maintained to have the console in the previous version of DS2 working
  36 #define DS_GPIO_AVR_RESET_DS2           7
  37
  38 #define DS_GPIO_OE2                     22
  39 #define DS_GPIO_UART_ENA                23
  40 #define DS_GPIO_CONF_BTN                20
  41
  42 #define DS_KEYS_POLL_INTERVAL           20      /* msecs */
  43 #define DS_KEYS_DEBOUNCE_INTERVAL       (3 * DS_KEYS_POLL_INTERVAL)
  44
  45 #define DS_MAC0_OFFSET                  0x0000
  46 #define DS_MAC1_OFFSET                  0x0006
  47 #define DS_CALDATA_OFFSET               0x1000
  48 #define DS_WMAC_MAC_OFFSET              0x1002
  49
  50
  51 static struct gpio_led ds_leds_gpio[] __initdata = {
  52         {
  53                 .name           = "arduino:white:usb",
  54                 .gpio           = DS_GPIO_LED_USB,
  55                 .active_low     = 0,
  56         },
  57         {
  58                 .name           = "arduino:blue:wlan",
  59                 .gpio           = DS_GPIO_LED_WLAN,
  60                 .active_low     = 0,
  61         },
  62 };
  63
  64 static void __init ds_common_setup(void)
  65 {
  66         static u8 mac[6];
  67
  68         u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);
  69         ath79_register_m25p80(NULL);
  70
  71         if (ar93xx_wmac_read_mac_address(mac)) {
  72                 ath79_register_wmac(NULL, NULL);
  73         } else {
  74                 ath79_register_wmac(art + DS_CALDATA_OFFSET,
  75                                     art + DS_WMAC_MAC_OFFSET);
  76                 memcpy(mac, art + DS_WMAC_MAC_OFFSET, sizeof(mac));
  77         }
  78
  79         mac[3] |= 0x08;
  80         ath79_init_mac(ath79_eth0_data.mac_addr, mac, 0);
  81
  82         mac[3] &= 0xF7;
  83         ath79_init_mac(ath79_eth1_data.mac_addr, mac, 0);
  84         ath79_register_mdio(0, 0x0);
  85
  86         /* LAN ports */
  87         ath79_register_eth(1);
  88
  89         /* WAN port */
  90         ath79_register_eth(0);
  91 }
  92
  93 static void __init ds_setup(void)
  94 {
  95         u32 t;
  96
  97         ds_common_setup();
  98
  99         ath79_register_leds_gpio(-1, ARRAY_SIZE(ds_leds_gpio),
 100                                  ds_leds_gpio);
 101         ath79_register_usb();
 102
 103         //Disable the Function for some pins to have GPIO functionality active
 104         // GPIO6-7-8 and GPIO11
 105         ath79_gpio_function_setup(AR933X_GPIO_FUNC_JTAG_DISABLE | AR933X_GPIO_FUNC_I2S_MCK_EN, 0);
 106
 107         ath79_gpio_function2_setup(AR933X_GPIO_FUNC2_JUMPSTART_DISABLE, 0);
 108
 109         printk("Setting DogStick2 GPIO\n");
 110
 111         t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
 112         t |= AR933X_BOOTSTRAP_MDIO_GPIO_EN;
 113         ath79_reset_wr(AR933X_RESET_REG_BOOTSTRAP, t);
 114
 115         // Put the avr reset to high
 116         if (gpio_request_one(DS_GPIO_AVR_RESET_DS2,
 117             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "OE-1") != 0)
 118                 printk("Error setting GPIO OE\n");
 119         gpio_unexport(DS_GPIO_AVR_RESET_DS2);
 120         gpio_free(DS_GPIO_AVR_RESET_DS2);
 121
 122         // enable OE of level shifter
 123         if (gpio_request_one(DS_GPIO_OE,
 124             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "OE-1") != 0)
 125                 printk("Error setting GPIO OE\n");
 126
 127         if (gpio_request_one(DS_GPIO_UART_ENA,
 128             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "UART-ENA") != 0)
 129                 printk("Error setting GPIO Uart Enable\n");
 130
 131         // enable OE of level shifter
 132         if (gpio_request_one(DS_GPIO_OE2,
 133             GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED, "OE-2") != 0)
 134                 printk("Error setting GPIO OE2\n");
 135 }
 136
 137 MIPS_MACHINE(ATH79_MACH_ARDUINO_YUN, "Yun", "Arduino Yun", ds_setup);