MIPS: Add support for Texas Instruments AR7 System-on-a-Chip

This patch adds support for the Texas Instruments AR7 System-on-a-Chip.
It supports the TNETD7100, 7200 and 7300 versions of the SoC.

Signed-off-by: Matteo Croce <matteo@openwrt.org>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Eugene Konev <ejka@openwrt.org>
Signed-off-by: Nicolas Thill <nico@openwrt.org>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/arch/mips/ar7/setup.c b/arch/mips/ar7/setup.c
new file mode 100644
index 000000000000..6ebb5f16d967
--- /dev/null
+++ b/arch/mips/ar7/setup.c
@@ -0,0 +1,94 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/pm.h>
+#include <linux/time.h>
+
+#include <asm/reboot.h>
+#include <asm/mach-ar7/ar7.h>
+#include <asm/mach-ar7/prom.h>
+
+static void ar7_machine_restart(char *command)
+{
+        u32 *softres_reg = ioremap(AR7_REGS_RESET +
+                                          AR7_RESET_SOFTWARE, 1);
+        writel(1, softres_reg);
+}
+
+static void ar7_machine_halt(void)
+{
+        while (1)
+                ;
+}
+
+static void ar7_machine_power_off(void)
+{
+        u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
+        u32 power_state = readl(power_reg) | (3 << 30);
+        writel(power_state, power_reg);
+        ar7_machine_halt();
+}
+
+const char *get_system_type(void)
+{
+        u16 chip_id = ar7_chip_id();
+        switch (chip_id) {
+        case AR7_CHIP_7300:
+                return "TI AR7 (TNETD7300)";
+        case AR7_CHIP_7100:
+                return "TI AR7 (TNETD7100)";
+        case AR7_CHIP_7200:
+                return "TI AR7 (TNETD7200)";
+        default:
+                return "TI AR7 (Unknown)";
+        }
+}
+
+static int __init ar7_init_console(void)
+{
+        return 0;
+}
+console_initcall(ar7_init_console);
+
+/*
+ * Initializes basic routines and structures pointers, memory size (as
+ * given by the bios and saves the command line.
+ */
+
+void __init plat_mem_setup(void)
+{
+        unsigned long io_base;
+
+        _machine_restart = ar7_machine_restart;
+        _machine_halt = ar7_machine_halt;
+        pm_power_off = ar7_machine_power_off;
+        panic_timeout = 3;
+
+        io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
+        if (!io_base)
+                panic("Can't remap IO base!\n");
+        set_io_port_base(io_base);
+
+        prom_meminit();
+
+        printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
+                                        get_system_type(),
+                ar7_chip_id(), ar7_chip_rev());
+}