Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / mips / ath79 / setup.c

diff --git a/arch/mips/ath79/setup.c b/arch/mips/ath79/setup.c
new file mode 100644 (file)
index 0000000..159b42f
--- /dev/null
+++ b/arch/mips/ath79/setup.c
@@ -0,0 +1,206 @@
+/*
+ *  Atheros AR71XX/AR724X/AR913X specific setup
+ *
+ *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ *  Parts of this file are based on Atheros' 2.6.15 BSP
+ *
+ *  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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <asm/bootinfo.h>
+#include <asm/time.h>          /* for mips_hpt_frequency */
+#include <asm/reboot.h>                /* for _machine_{restart,halt} */
+#include <asm/mips_machine.h>
+
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+#include "common.h"
+#include "dev-common.h"
+#include "machtypes.h"
+
+#define ATH79_SYS_TYPE_LEN     64
+
+#define AR71XX_BASE_FREQ       40000000
+#define AR724X_BASE_FREQ       5000000
+#define AR913X_BASE_FREQ       5000000
+
+static char ath79_sys_type[ATH79_SYS_TYPE_LEN];
+
+static void ath79_restart(char *command)
+{
+       ath79_device_reset_set(AR71XX_RESET_FULL_CHIP);
+       for (;;)
+               if (cpu_wait)
+                       cpu_wait();
+}
+
+static void ath79_halt(void)
+{
+       while (1)
+               cpu_wait();
+}
+
+static void __init ath79_detect_mem_size(void)
+{
+       unsigned long size;
+
+       for (size = ATH79_MEM_SIZE_MIN; size < ATH79_MEM_SIZE_MAX;
+            size <<= 1) {
+               if (!memcmp(ath79_detect_mem_size,
+                           ath79_detect_mem_size + size, 1024))
+                       break;
+       }
+
+       add_memory_region(0, size, BOOT_MEM_RAM);
+}
+
+static void __init ath79_detect_sys_type(void)
+{
+       char *chip = "????";
+       u32 id;
+       u32 major;
+       u32 minor;
+       u32 rev = 0;
+
+       id = ath79_reset_rr(AR71XX_RESET_REG_REV_ID);
+       major = id & REV_ID_MAJOR_MASK;
+
+       switch (major) {
+       case REV_ID_MAJOR_AR71XX:
+               minor = id & AR71XX_REV_ID_MINOR_MASK;
+               rev = id >> AR71XX_REV_ID_REVISION_SHIFT;
+               rev &= AR71XX_REV_ID_REVISION_MASK;
+               switch (minor) {
+               case AR71XX_REV_ID_MINOR_AR7130:
+                       ath79_soc = ATH79_SOC_AR7130;
+                       chip = "7130";
+                       break;
+
+               case AR71XX_REV_ID_MINOR_AR7141:
+                       ath79_soc = ATH79_SOC_AR7141;
+                       chip = "7141";
+                       break;
+
+               case AR71XX_REV_ID_MINOR_AR7161:
+                       ath79_soc = ATH79_SOC_AR7161;
+                       chip = "7161";
+                       break;
+               }
+               break;
+
+       case REV_ID_MAJOR_AR7240:
+               ath79_soc = ATH79_SOC_AR7240;
+               chip = "7240";
+               rev = (id & AR724X_REV_ID_REVISION_MASK);
+               break;
+
+       case REV_ID_MAJOR_AR7241:
+               ath79_soc = ATH79_SOC_AR7241;
+               chip = "7241";
+               rev = (id & AR724X_REV_ID_REVISION_MASK);
+               break;
+
+       case REV_ID_MAJOR_AR7242:
+               ath79_soc = ATH79_SOC_AR7242;
+               chip = "7242";
+               rev = (id & AR724X_REV_ID_REVISION_MASK);
+               break;
+
+       case REV_ID_MAJOR_AR913X:
+               minor = id & AR913X_REV_ID_MINOR_MASK;
+               rev = id >> AR913X_REV_ID_REVISION_SHIFT;
+               rev &= AR913X_REV_ID_REVISION_MASK;
+               switch (minor) {
+               case AR913X_REV_ID_MINOR_AR9130:
+                       ath79_soc = ATH79_SOC_AR9130;
+                       chip = "9130";
+                       break;
+
+               case AR913X_REV_ID_MINOR_AR9132:
+                       ath79_soc = ATH79_SOC_AR9132;
+                       chip = "9132";
+                       break;
+               }
+               break;
+
+       default:
+               panic("ath79: unknown SoC, id:0x%08x\n", id);
+       }
+
+       sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev);
+       pr_info("SoC: %s\n", ath79_sys_type);
+}
+
+const char *get_system_type(void)
+{
+       return ath79_sys_type;
+}
+
+unsigned int __cpuinit get_c0_compare_int(void)
+{
+       return CP0_LEGACY_COMPARE_IRQ;
+}
+
+void __init plat_mem_setup(void)
+{
+       set_io_port_base(KSEG1);
+
+       ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
+                                          AR71XX_RESET_SIZE);
+       ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE,
+                                        AR71XX_PLL_SIZE);
+       ath79_ddr_base = ioremap_nocache(AR71XX_DDR_CTRL_BASE,
+                                        AR71XX_DDR_CTRL_SIZE);
+
+       ath79_detect_sys_type();
+       ath79_detect_mem_size();
+       ath79_clocks_init();
+
+       _machine_restart = ath79_restart;
+       _machine_halt = ath79_halt;
+       pm_power_off = ath79_halt;
+}
+
+void __init plat_time_init(void)
+{
+       struct clk *clk;
+
+       clk = clk_get(NULL, "cpu");
+       if (IS_ERR(clk))
+               panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
+
+       mips_hpt_frequency = clk_get_rate(clk) / 2;
+}
+
+static int __init ath79_setup(void)
+{
+       ath79_gpio_init();
+       ath79_register_uart();
+       ath79_register_wdt();
+
+       mips_machine_setup();
+
+       return 0;
+}
+
+arch_initcall(ath79_setup);
+
+static void __init ath79_generic_init(void)
+{
+       /* Nothing to do */
+}
+
+MIPS_MACHINE(ATH79_MACH_GENERIC,
+            "Generic",
+            "Generic AR71XX/AR724X/AR913X based board",
+            ath79_generic_init);