MIPS: add Atheros ar531x family support

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 188 insertions, 0 deletions

diff --git a/arch/mips/mach-ar231x/board.c b/arch/mips/mach-ar231x/board.c
new file mode 100644
index 0000000000..f1b876f762
--- /dev/null
+++ b/arch/mips/mach-ar231x/board.c
@@ -0,0 +1,188 @@
+/*
+ * Based on Linux driver:
+ *  Copyright (C) 2003 Atheros Communications, Inc.,  All Rights Reserved.
+ *  Copyright (C) 2006 FON Technology, SL.
+ *  Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
+ *  Copyright (C) 2006-2009 Felix Fietkau <nbd@openwrt.org>
+ * Ported to Barebox:
+ *  Copyright (C) 2013 Oleksij Rempel <linux@rempel-privat.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+#include <common.h>
+#include <io.h>
+#include <mach/ar2312_regs.h>
+#include <mach/ar231x_platform.h>
+#include <linux/stddef.h>
+#include <net.h>
+
+#define HDR_SIZE 6
+
+#define TAB_1 "\t"
+#define TAB_2 "\t\t"
+
+extern struct ar231x_board_data ar231x_board;
+
+static void
+ar231x_print_mac(unsigned char *mac)
+{
+	int i;
+	for (i = 0; i < 5; i++)
+		printf("%02x:", mac[i]);
+	printf("%02x\n", mac[5]);
+}
+
+#ifdef DEBUG_BOARD
+static void
+ar231x_print_board_config(struct ar231x_board_config *config)
+{
+	printf("board config:\n");
+	printf(TAB_1 "chsum:"		TAB_2 "%04x\n", config->cksum);
+	printf(TAB_1 "rev:"		TAB_2 "%04x\n", config->rev);
+	printf(TAB_1 "name:"		TAB_2 "%s\n", config->board_name);
+	printf(TAB_1 "maj:"		TAB_2 "%04x\n", config->major);
+	printf(TAB_1 "min:"		TAB_2 "%04x\n", config->minor);
+	printf(TAB_1 "board flags:" TAB_1 "%08x\n", config->flags);
+
+	if (config->flags & BD_ENET0)
+		printf(TAB_2 "ENET0 is stuffed\n");
+	if (config->flags & BD_ENET1)
+		printf(TAB_2 "ENET1 is stuffed\n");
+	if (config->flags & BD_UART1)
+		printf(TAB_2 "UART1 is stuffed\n");
+	if (config->flags & BD_UART0)
+		printf(TAB_2 "UART0 is stuffed (dma)\n");
+	if (config->flags & BD_RSTFACTORY)
+		printf(TAB_2 "Reset factory defaults stuffed\n");
+	if (config->flags & BD_SYSLED)
+		printf(TAB_2 "System LED stuffed\n");
+	if (config->flags & BD_EXTUARTCLK)
+		printf(TAB_2 "External UART clock\n");
+	if (config->flags & BD_CPUFREQ)
+		printf(TAB_2 "cpu freq is valid in nvram\n");
+	if (config->flags & BD_SYSFREQ)
+		printf(TAB_2 "sys freq is set in nvram\n");
+	if (config->flags & BD_WLAN0)
+		printf(TAB_2 "Enable WLAN0\n");
+	if (config->flags & BD_MEMCAP)
+		printf(TAB_2 "CAP SDRAM @ memCap for testing\n");
+	if (config->flags & BD_DISWATCHDOG)
+		printf(TAB_2 "disable system watchdog\n");
+	if (config->flags & BD_WLAN1)
+		printf(TAB_2 "Enable WLAN1 (ar5212)\n");
+	if (config->flags & BD_ISCASPER)
+		printf(TAB_2 "FLAG for AR2312\n");
+	if (config->flags & BD_WLAN0_2G_EN)
+		printf(TAB_2 "FLAG for radio0_2G\n");
+	if (config->flags & BD_WLAN0_5G_EN)
+		printf(TAB_2 "FLAG for radio0_5G\n");
+	if (config->flags & BD_WLAN1_2G_EN)
+		printf(TAB_2 "FLAG for radio1_2G\n");
+	if (config->flags & BD_WLAN1_5G_EN)
+		printf(TAB_2 "FLAG for radio1_5G\n");
+
+	printf(TAB_1 "ResetConf GPIO pin:" TAB_1 "%04x\n",
+	       config->reset_config_gpio);
+	printf(TAB_1 "Sys LED GPIO pin:" TAB_1 "%04x\n", config->sys_led_gpio);
+	printf(TAB_1 "CPU Freq:" TAB_2 "%u\n", config->cpu_freq);
+	printf(TAB_1 "Sys Freq:" TAB_2 "%u\n", config->sys_freq);
+	printf(TAB_1 "Calculated Freq:" TAB_1 "%u\n", config->cnt_freq);
+
+	printf(TAB_1 "wlan0 mac:" TAB_2);
+	ar231x_print_mac(config->wlan0_mac);
+	printf(TAB_1 "wlan1 mac:" TAB_2);
+	ar231x_print_mac(config->wlan1_mac);
+	printf(TAB_1 "eth0 mac:" TAB_2);
+	ar231x_print_mac(config->enet0_mac);
+	printf(TAB_1 "eth1 mac:" TAB_2);
+	ar231x_print_mac(config->enet1_mac);
+
+	printf(TAB_1 "Pseudo PCIID:" TAB_2 "%04x\n", config->pci_id);
+	printf(TAB_1 "Mem capacity:" TAB_2 "%u\n", config->mem_cap);
+}
+#endif
+
+static u16
+ar231x_cksum16(u8 *data, int size)
+{
+	int i;
+	u16 sum;
+
+	for (i = 0; i < size; i++)
+		sum += data[i];
+
+	return sum;
+}
+
+static void
+ar231x_check_mac(u8 *addr)
+{
+	if (!is_valid_ether_addr(addr)) {
+		pr_warn("config: no valid mac was found. "
+				"Generating random mac: ");
+		random_ether_addr(addr);
+		ar231x_print_mac(addr);
+	}
+}
+
+static u8 *
+ar231x_find_board_config(u8 *flash_limit)
+{
+	u8 *addr;
+	int found = 0;
+
+	for (addr = flash_limit - 0x1000;
+		addr >= flash_limit - 0x30000;
+		addr -= 0x1000) {
+
+		if (*((u32 *)addr) == AR231X_BD_MAGIC) {
+			found = 1;
+			pr_debug("config at %x\n", addr);
+			break;
+		}
+	}
+
+	if (!found)
+		addr = NULL;
+
+	return addr;
+}
+
+void
+ar231x_find_config(u8 *flash_limit)
+{
+	struct ar231x_board_config *config;
+	u8 *bcfg, bsize;
+	u8 brocken;
+
+	bcfg = ar231x_find_board_config(flash_limit);
+
+	bsize = sizeof(struct ar231x_board_config);
+	config = xzalloc(bsize);
+	ar231x_board.config = config;
+
+	if (bcfg) {
+		u16 cksum;
+		/* Copy the board and radio data to RAM.
+		 * If flash will go to CFI mode, we won't
+		 * be able to read to from mapped memory area */
+		memcpy(config, bcfg, bsize);
+		cksum = 0xca + ar231x_cksum16((unsigned char *)config + HDR_SIZE,
+				sizeof(struct ar231x_board_config) - HDR_SIZE);
+		if (cksum != config->cksum) {
+			pr_err("config: checksum is invalid: %04x != %04x\n",
+					cksum, config->cksum);
+			brocken = 1;
+		}
+		/* ar231x_print_board_config(config); */
+	}
+
+	/* We do not care about wlans here */
+	ar231x_check_mac(config->enet0_mac);
+	ar231x_check_mac(config->enet1_mac);
+}