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[PATCH 2/12] add basic gdium support

To: linux-mips@linux-mips.org, loongson-dev <loongson-dev@googlegroups.com>, wuzhangjin@gmail.com, apatard@mandriva.com
Subject: [PATCH 2/12] add basic gdium support
From: yajin <yajinzhou@vm-kernel.org>
Date: Tue, 4 May 2010 17:55:03 +0800
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
Gdium is same to most of the loongson2f based machines except that it
does NOT use the cs5536 south bridge.

Signed-off-by: yajin <yajin@vm-kernel.org>
---
 arch/mips/Makefile                            |    1 +
 arch/mips/include/asm/mach-loongson/machine.h |    7 +++
 arch/mips/loongson/Kconfig                    |   25 +++++++++
 arch/mips/loongson/Makefile                   |    6 ++
 arch/mips/loongson/gdium/Makefile             |    3 +
 arch/mips/loongson/gdium/irq.c                |   66 +++++++++++++++++++++++++
 arch/mips/loongson/gdium/reset.c              |   25 +++++++++
 7 files changed, 133 insertions(+), 0 deletions(-)
 create mode 100644 arch/mips/loongson/gdium/Makefile
 create mode 100644 arch/mips/loongson/gdium/irq.c
 create mode 100644 arch/mips/loongson/gdium/reset.c

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 0b9c01a..c1470af 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -359,6 +359,7 @@ cflags-$(CONFIG_MACH_LOONGSON) +=
-I$(srctree)/arch/mips/include/asm/mach-loongs
                     -mno-branch-likely
 load-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000
 load-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000
+load-$(CONFIG_DEXXON_GDIUM) += 0xffffffff80200000

 #
 # MIPS Malta board
diff --git a/arch/mips/include/asm/mach-loongson/machine.h
b/arch/mips/include/asm/mach-loongson/machine.h
index 4321338..fb9554c 100644
--- a/arch/mips/include/asm/mach-loongson/machine.h
+++ b/arch/mips/include/asm/mach-loongson/machine.h
@@ -24,4 +24,11 @@

 #endif

+/* use gdium as the default machine of LEMOTE_MACH2F */
+#ifdef CONFIG_DEXXON_GDIUM
+
+#define LOONGSON_MACHTYPE MACH_DEXXON_GDIUM2F10
+
+#endif
+
 #endif /* __ASM_MACH_LOONGSON_MACHINE_H */
diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig
index 3df1967..90a02b4 100644
--- a/arch/mips/loongson/Kconfig
+++ b/arch/mips/loongson/Kconfig
@@ -57,6 +57,31 @@ config LEMOTE_MACH2F

          These family machines include fuloong2f mini PC, yeeloong2f notebook,
          LingLoong allinone PC and so forth.
+
+config DEXXON_GDIUM
+        bool "Dexxon Gdium Netbook"
+        select ARCH_SPARSEMEM_ENABLE
+        select BOARD_SCACHE
+        select BOOT_ELF32
+        select CEVT_R4K
+        select CPU_HAS_WB
+        select CSRC_R4K
+        select DMA_NONCOHERENT
+        select GENERIC_HARDIRQS_NO__DO_IRQ
+        select GENERIC_ISA_DMA_SUPPORT_BROKEN
+        select HW_HAS_PCI
+        select I8259
+        select IRQ_CPU
+        select ISA
+        select SYS_HAS_CPU_LOONGSON2F
+        select SYS_HAS_EARLY_PRINTK
+        select SYS_SUPPORTS_32BIT_KERNEL
+        select SYS_SUPPORTS_64BIT_KERNEL
+        select SYS_SUPPORTS_HIGHMEM
+        select SYS_SUPPORTS_LITTLE_ENDIAN
+        select ARCH_REQUIRE_GPIOLIB
+        help
+          Dexxon gdium netbook based on Loongson 2F and SM502.
 endchoice

 config CS5536
diff --git a/arch/mips/loongson/Makefile b/arch/mips/loongson/Makefile
index 2b76cb0..6002109 100644
--- a/arch/mips/loongson/Makefile
+++ b/arch/mips/loongson/Makefile
@@ -15,3 +15,9 @@ obj-$(CONFIG_LEMOTE_FULOONG2E)  += fuloong-2e/
 #

 obj-$(CONFIG_LEMOTE_MACH2F)  += lemote-2f/
+
+#
+# gdium
+#
+
+obj-$(CONFIG_DEXXON_GDIUM)  += gdium/
diff --git a/arch/mips/loongson/gdium/Makefile
b/arch/mips/loongson/gdium/Makefile
new file mode 100644
index 0000000..31a8e57
--- /dev/null
+++ b/arch/mips/loongson/gdium/Makefile
@@ -0,0 +1,3 @@
+# Makefile for gdium
+
+obj-y += irq.o reset.o
diff --git a/arch/mips/loongson/gdium/irq.c b/arch/mips/loongson/gdium/irq.c
new file mode 100644
index 0000000..b0679eb
--- /dev/null
+++ b/arch/mips/loongson/gdium/irq.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2007 Lemote Inc.
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (c) 2010 yajin <yajin@vm-kernel.org>
+ *
+ *  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 <linux/interrupt.h>
+#include <linux/module.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+
+#include <loongson.h>
+#include <machine.h>
+
+#define LOONGSON_TIMER_IRQ      (MIPS_CPU_IRQ_BASE + 7) /* cpu timer */
+#define LOONGSON_PERFCNT_IRQ    (MIPS_CPU_IRQ_BASE + 6) /* cpu perf counter */
+#define LOONGSON_NORTH_BRIDGE_IRQ       (MIPS_CPU_IRQ_BASE + 6) /* bonito */
+#define LOONGSON_UART_IRQ       (MIPS_CPU_IRQ_BASE + 3) /* cpu serial port */
+
+void mach_irq_dispatch(unsigned int pending)
+{
+       if (pending & CAUSEF_IP7)
+               do_IRQ(LOONGSON_TIMER_IRQ);
+       else if (pending & CAUSEF_IP6) {        /* North Bridge, Perf counter */
+#ifdef CONFIG_OPROFILE
+               do_IRQ(LOONGSON2_PERFCNT_IRQ);
+#endif
+               bonito_irqdispatch();
+       } else if (pending & CAUSEF_IP3)        /* CPU UART */
+               do_IRQ(LOONGSON_UART_IRQ);
+       else
+               spurious_interrupt();
+}
+
+static irqreturn_t ip6_action(int cpl, void *dev_id)
+{
+       return IRQ_HANDLED;
+}
+
+struct irqaction ip6_irqaction = {
+       .handler = ip6_action,
+       .name = "cascade",
+       .flags = IRQF_SHARED,
+};
+
+void __init mach_init_irq(void)
+{
+       /* init all controller
+       *   16-23        ------> mips cpu interrupt
+       *   32-63        ------> bonito irq
+       */
+
+       /* Sets the first-level interrupt dispatcher. */
+       mips_cpu_irq_init();
+       bonito_irq_init();
+
+       /* setup north bridge irq (bonito) */
+       setup_irq(LOONGSON_NORTH_BRIDGE_IRQ, &ip6_irqaction);
+}
diff --git a/arch/mips/loongson/gdium/reset.c b/arch/mips/loongson/gdium/reset.c
new file mode 100644
index 0000000..da7752d
--- /dev/null
+++ b/arch/mips/loongson/gdium/reset.c
@@ -0,0 +1,25 @@
+/* Board-specific reboot/shutdown routines
+ *
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2010 yajin <yajin@vm-kernel.org>
+ *
+ * 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 <loongson.h>
+
+void mach_prepare_shutdown(void)
+{
+       LOONGSON_GPIOIE &= ~(1<<1);
+       LOONGSON_GPIODATA |= (1<<1);
+}
+
+void mach_prepare_reboot(void)
+{
+       LOONGSON_GPIOIE &= ~(1<<2);
+       LOONGSON_GPIODATA &= ~(1<<2);
+}
-- 
1.5.6.5

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