ar71xx: add kernel support for the Mikrotik RB951G board

This is platform definition for the RB951G device. It's mostly rework
of RB2011UAS patchset with network taken from the RB751 patches.
The main difference is the flash layout used by this device.

[juhosg:
  - remove dead code from mach-rb951g
  - add "-2HnD" suffix to the machine name
  - use a separate 615-MIPS-ath79-RB951G-support.patch]

Patchwork: http://patchwork.openwrt.org/patch/3257/
Signed-off-by: Kamil Trzcinski <ayufan@ayufan.eu>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35633 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 214 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb95x.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb95x.c
new file mode 100644
index 0000000000..f59c14c53f
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb95x.c
@@ -0,0 +1,214 @@
+/*
+ *  MikroTik RouterBOARD 95X support
+ *
+ *  Copyright (C) 2012 Stijn Tintel <stijn@linux-ipv6.be>
+ *  Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2013 Kamil Trzcinski <ayufan@ayufan.eu>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) "rb95x: " fmt
+
+#include <linux/phy.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/ath9k_platform.h>
+#include <linux/ar8216_platform.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
+#include <linux/rle.h>
+#include <linux/routerboot.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+#include "common.h"
+#include "dev-eth.h"
+#include "dev-m25p80.h"
+#include "dev-nfc.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+#include "routerboot.h"
+
+#define RB95X_GPIO_NAND_NCE	14
+
+#define RB_ROUTERBOOT_OFFSET	0x0000
+#define RB_ROUTERBOOT_SIZE	0xb000
+#define RB_HARD_CFG_OFFSET	0xc000
+#define RB_HARD_CFG_SIZE	0x1000
+#define RB_BIOS_OFFSET		0xd000
+#define RB_BIOS_SIZE		0x2000
+#define RB_SOFT_CFG_OFFSET	0xe000
+#define RB_SOFT_CFG_SIZE	0x1000
+
+#define RB_ART_SIZE		0x10000
+
+static struct mtd_partition rb95x_nand_partitions[] = {
+	{
+		.name	= "booter",
+		.offset	= 0,
+		.size	= (256 * 1024),
+		.mask_flags = MTD_WRITEABLE,
+	},
+	{
+		.name	= "kernel",
+		.offset	= (256 * 1024),
+		.size	= (4 * 1024 * 1024) - (256 * 1024),
+	},
+	{
+		.name	= "rootfs",
+		.offset	= MTDPART_OFS_NXTBLK,
+		.size	= MTDPART_SIZ_FULL,
+	},
+};
+
+static struct ar8327_pad_cfg rb95x_ar8327_pad0_cfg = {
+	.mode = AR8327_PAD_MAC_RGMII,
+	.txclk_delay_en = true,
+	.rxclk_delay_en = true,
+	.txclk_delay_sel = AR8327_CLK_DELAY_SEL1,
+	.rxclk_delay_sel = AR8327_CLK_DELAY_SEL2,
+};
+
+static struct ar8327_platform_data rb95x_ar8327_data = {
+	.pad0_cfg = &rb95x_ar8327_pad0_cfg,
+	.port0_cfg = {
+		.force_link = 1,
+		.speed = AR8327_PORT_SPEED_1000,
+		.duplex = 1,
+		.txpause = 1,
+		.rxpause = 1,
+	}
+};
+
+static struct mdio_board_info rb95x_mdio0_info[] = {
+	{
+		.bus_id = "ag71xx-mdio.0",
+		.phy_addr = 0,
+		.platform_data = &rb95x_ar8327_data,
+	},
+};
+
+void __init rb95x_wlan_init(void)
+{
+	u8 *hard_cfg = (u8 *) KSEG1ADDR(0x1f000000 + RB_HARD_CFG_OFFSET);
+	u16 tag_len;
+	u8 *tag;
+	char *art_buf;
+	u8 wlan_mac[ETH_ALEN];
+	int err;
+
+	err = routerboot_find_tag(hard_cfg, RB_HARD_CFG_SIZE, RB_ID_WLAN_DATA,
+				  &tag, &tag_len);
+	if (err) {
+		pr_err("no calibration data found\n");
+		return;
+	}
+
+	art_buf = kmalloc(RB_ART_SIZE, GFP_KERNEL);
+	if (art_buf == NULL) {
+		pr_err("no memory for calibration data\n");
+		return;
+	}
+
+	err = rle_decode((char *) tag, tag_len, art_buf, RB_ART_SIZE,
+			 NULL, NULL);
+	if (err) {
+		pr_err("unable to decode calibration data\n");
+		goto free;
+	}
+
+	ath79_init_mac(wlan_mac, ath79_mac_base, 11);
+	ath79_register_wmac(art_buf + 0x1000, wlan_mac);
+
+free:
+	kfree(art_buf);
+}
+
+static void rb95x_nand_select_chip(int chip_no)
+{
+	switch (chip_no) {
+	case 0:
+		gpio_set_value(RB95X_GPIO_NAND_NCE, 0);
+		break;
+	default:
+		gpio_set_value(RB95X_GPIO_NAND_NCE, 1);
+		break;
+	}
+	ndelay(500);
+}
+
+static struct nand_ecclayout rb95x_nand_ecclayout = {
+	.eccbytes	= 6,
+	.eccpos		= { 8, 9, 10, 13, 14, 15 },
+	.oobavail	= 9,
+	.oobfree	= { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
+};
+
+static int rb95x_nand_scan_fixup(struct mtd_info *mtd)
+{
+	struct nand_chip *chip = mtd->priv;
+
+	if (mtd->writesize == 512) {
+		/*
+		 * Use the OLD Yaffs-1 OOB layout, otherwise RouterBoot
+		 * will not be able to find the kernel that we load.
+		 */
+		chip->ecc.layout = &rb95x_nand_ecclayout;
+	}
+
+	return 0;
+}
+
+void __init rb95x_nand_init(void)
+{
+	ath79_nfc_set_scan_fixup(rb95x_nand_scan_fixup);
+	ath79_nfc_set_parts(rb95x_nand_partitions,
+			    ARRAY_SIZE(rb95x_nand_partitions));
+	ath79_nfc_set_select_chip(rb95x_nand_select_chip);
+	ath79_nfc_set_swap_dma(true);
+	ath79_register_nfc();
+}
+
+void __init rb95x_gpio_init(void)
+{
+	gpio_request_one(RB95X_GPIO_NAND_NCE, GPIOF_OUT_INIT_HIGH, "NAND nCE");
+}
+
+static void __init rb95x_setup(void)
+{
+	rb95x_gpio_init();
+	rb95x_nand_init();
+
+	ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0 |
+				   AR934X_ETH_CFG_SW_ONLY_MODE);
+
+	ath79_register_mdio(0, 0x0);
+
+	mdiobus_register_board_info(rb95x_mdio0_info,
+				    ARRAY_SIZE(rb95x_mdio0_info));
+
+	ath79_init_mac(ath79_eth0_data.mac_addr, ath79_mac_base, 0);
+	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
+	ath79_eth0_data.phy_mask = BIT(0);
+
+	ath79_register_eth(0);
+}
+
+static void __init rb951g_setup(void)
+{
+	rb95x_setup();
+	rb95x_wlan_init();
+	ath79_register_usb();
+}
+
+MIPS_MACHINE(ATH79_MACH_RB_951G, "951G", "MikroTik RouterBOARD 951G-2HnD",
+	     rb951g_setup);