target/linux/ar71xx/files/arch/mips/ath79/mach-rb95x.c

   1 /*
   2  *  MikroTik RouterBOARD 95X support
   3  *
   4  *  Copyright (C) 2012 Stijn Tintel <stijn@linux-ipv6.be>
   5  *  Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
   6  *  Copyright (C) 2013 Kamil Trzcinski <ayufan@ayufan.eu>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify it
   9  *  under the terms of the GNU General Public License version 2 as published
  10  *  by the Free Software Foundation.
  11  */
  12
  13 #define pr_fmt(fmt) "rb95x: " fmt
  14
  15 #include <linux/phy.h>
  16 #include <linux/delay.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/ath9k_platform.h>
  19 #include <linux/ar8216_platform.h>
  20 #include <linux/mtd/mtd.h>
  21 #include <linux/mtd/nand.h>
  22 #include <linux/mtd/partitions.h>
  23 #include <linux/spi/spi.h>
  24 #include <linux/spi/flash.h>
  25 #include <linux/rle.h>
  26 #include <linux/routerboot.h>
  27 #include <linux/gpio.h>
  28
  29 #include <asm/mach-ath79/ath79.h>
  30 #include <asm/mach-ath79/ar71xx_regs.h>
  31
  32 #include "common.h"
  33 #include "dev-eth.h"
  34 #include "dev-m25p80.h"
  35 #include "dev-nfc.h"
  36 #include "dev-usb.h"
  37 #include "dev-wmac.h"
  38 #include "machtypes.h"
  39 #include "routerboot.h"
  40
  41 #define RB95X_GPIO_NAND_NCE     14
  42
  43 #define RB_ROUTERBOOT_OFFSET    0x0000
  44 #define RB_ROUTERBOOT_SIZE      0xb000
  45 #define RB_HARD_CFG_OFFSET      0xc000
  46 #define RB_HARD_CFG_SIZE        0x1000
  47 #define RB_BIOS_OFFSET          0xd000
  48 #define RB_BIOS_SIZE            0x2000
  49 #define RB_SOFT_CFG_OFFSET      0xe000
  50 #define RB_SOFT_CFG_SIZE        0x1000
  51
  52 #define RB_ART_SIZE             0x10000
  53
  54 static struct mtd_partition rb95x_nand_partitions[] = {
  55         {
  56                 .name   = "booter",
  57                 .offset = 0,
  58                 .size   = (256 * 1024),
  59                 .mask_flags = MTD_WRITEABLE,
  60         },
  61         {
  62                 .name   = "kernel",
  63                 .offset = (256 * 1024),
  64                 .size   = (4 * 1024 * 1024) - (256 * 1024),
  65         },
  66         {
  67                 .name   = "rootfs",
  68                 .offset = MTDPART_OFS_NXTBLK,
  69                 .size   = MTDPART_SIZ_FULL,
  70         },
  71 };
  72
  73 static struct ar8327_pad_cfg rb95x_ar8327_pad0_cfg = {
  74         .mode = AR8327_PAD_MAC_RGMII,
  75         .txclk_delay_en = true,
  76         .rxclk_delay_en = true,
  77         .txclk_delay_sel = AR8327_CLK_DELAY_SEL1,
  78         .rxclk_delay_sel = AR8327_CLK_DELAY_SEL2,
  79 };
  80
  81 static struct ar8327_platform_data rb95x_ar8327_data = {
  82         .pad0_cfg = &rb95x_ar8327_pad0_cfg,
  83         .port0_cfg = {
  84                 .force_link = 1,
  85                 .speed = AR8327_PORT_SPEED_1000,
  86                 .duplex = 1,
  87                 .txpause = 1,
  88                 .rxpause = 1,
  89         }
  90 };
  91
  92 static struct mdio_board_info rb95x_mdio0_info[] = {
  93         {
  94                 .bus_id = "ag71xx-mdio.0",
  95                 .phy_addr = 0,
  96                 .platform_data = &rb95x_ar8327_data,
  97         },
  98 };
  99
 100 void __init rb95x_wlan_init(void)
 101 {
 102         u8 *hard_cfg = (u8 *) KSEG1ADDR(0x1f000000 + RB_HARD_CFG_OFFSET);
 103         u16 tag_len;
 104         u8 *tag;
 105         char *art_buf;
 106         u8 wlan_mac[ETH_ALEN];
 107         int err;
 108
 109         err = routerboot_find_tag(hard_cfg, RB_HARD_CFG_SIZE, RB_ID_WLAN_DATA,
 110                                   &tag, &tag_len);
 111         if (err) {
 112                 pr_err("no calibration data found\n");
 113                 return;
 114         }
 115
 116         art_buf = kmalloc(RB_ART_SIZE, GFP_KERNEL);
 117         if (art_buf == NULL) {
 118                 pr_err("no memory for calibration data\n");
 119                 return;
 120         }
 121
 122         err = rle_decode((char *) tag, tag_len, art_buf, RB_ART_SIZE,
 123                          NULL, NULL);
 124         if (err) {
 125                 pr_err("unable to decode calibration data\n");
 126                 goto free;
 127         }
 128
 129         ath79_init_mac(wlan_mac, ath79_mac_base, 11);
 130         ath79_register_wmac(art_buf + 0x1000, wlan_mac);
 131
 132 free:
 133         kfree(art_buf);
 134 }
 135
 136 static void rb95x_nand_select_chip(int chip_no)
 137 {
 138         switch (chip_no) {
 139         case 0:
 140                 gpio_set_value(RB95X_GPIO_NAND_NCE, 0);
 141                 break;
 142         default:
 143                 gpio_set_value(RB95X_GPIO_NAND_NCE, 1);
 144                 break;
 145         }
 146         ndelay(500);
 147 }
 148
 149 static struct nand_ecclayout rb95x_nand_ecclayout = {
 150         .eccbytes       = 6,
 151         .eccpos         = { 8, 9, 10, 13, 14, 15 },
 152         .oobavail       = 9,
 153         .oobfree        = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
 154 };
 155
 156 static int rb95x_nand_scan_fixup(struct mtd_info *mtd)
 157 {
 158         struct nand_chip *chip = mtd->priv;
 159
 160         if (mtd->writesize == 512) {
 161                 /*
 162                  * Use the OLD Yaffs-1 OOB layout, otherwise RouterBoot
 163                  * will not be able to find the kernel that we load.
 164                  */
 165                 chip->ecc.layout = &rb95x_nand_ecclayout;
 166         }
 167
 168         return 0;
 169 }
 170
 171 void __init rb95x_nand_init(void)
 172 {
 173         ath79_nfc_set_scan_fixup(rb95x_nand_scan_fixup);
 174         ath79_nfc_set_parts(rb95x_nand_partitions,
 175                             ARRAY_SIZE(rb95x_nand_partitions));
 176         ath79_nfc_set_select_chip(rb95x_nand_select_chip);
 177         ath79_nfc_set_swap_dma(true);
 178         ath79_register_nfc();
 179 }
 180
 181 void __init rb95x_gpio_init(void)
 182 {
 183         gpio_request_one(RB95X_GPIO_NAND_NCE, GPIOF_OUT_INIT_HIGH, "NAND nCE");
 184 }
 185
 186 static void __init rb95x_setup(void)
 187 {
 188         rb95x_gpio_init();
 189         rb95x_nand_init();
 190
 191         ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0 |
 192                                    AR934X_ETH_CFG_SW_ONLY_MODE);
 193
 194         ath79_register_mdio(0, 0x0);
 195
 196         mdiobus_register_board_info(rb95x_mdio0_info,
 197                                     ARRAY_SIZE(rb95x_mdio0_info));
 198
 199         ath79_init_mac(ath79_eth0_data.mac_addr, ath79_mac_base, 0);
 200         ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
 201         ath79_eth0_data.phy_mask = BIT(0);
 202
 203         ath79_register_eth(0);
 204 }
 205
 206 static void __init rb951g_setup(void)
 207 {
 208         rb95x_setup();
 209         rb95x_wlan_init();
 210         ath79_register_usb();
 211 }
 212
 213 MIPS_MACHINE(ATH79_MACH_RB_951G, "951G", "MikroTik RouterBOARD 951G-2HnD",
 214              rb951g_setup);