MIPS: Loongson: Change naming methods

To make source code of loongson sharable to the machines(such as gdium)
made by the other companies, we rename arch/mips/lemote to
arch/mips/loongson, asm/mach-lemote to asm/mach-loongson, and rename lm2e
to the name of the machine: fuloong-2e. accordingly, FULONG are renamed to
FULOONG2E to make it distinguishable to the future FULOONG2F.  and also,
some other relative tuning is needed.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

12 files changed, 559 insertions, 0 deletions

diff --git a/arch/mips/loongson/fuloong-2e/Makefile b/arch/mips/loongson/fuloong-2e/Makefile
new file mode 100644
index 000000000000..feb1d6bba499
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/Makefile
@@ -0,0 +1,13 @@
+#
+# Makefile for Lemote Fuloong2e mini-PC board.
+#
+
+obj-y += setup.o init.o reset.o irq.o pci.o bonito-irq.o mem.o \
+		env.o cmdline.o time.o machtype.o
+
+#
+# Early printk support
+#
+obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/loongson/fuloong-2e/bonito-irq.c b/arch/mips/loongson/fuloong-2e/bonito-irq.c
new file mode 100644
index 000000000000..3e31e7ad713e
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/bonito-irq.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org)
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ *  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 <loongson.h>
+
+static inline void bonito_irq_enable(unsigned int irq)
+{
+	BONITO_INTENSET = (1 << (irq - BONITO_IRQ_BASE));
+	mmiowb();
+}
+
+static inline void bonito_irq_disable(unsigned int irq)
+{
+	BONITO_INTENCLR = (1 << (irq - BONITO_IRQ_BASE));
+	mmiowb();
+}
+
+static struct irq_chip bonito_irq_type = {
+	.name	= "bonito_irq",
+	.ack	= bonito_irq_disable,
+	.mask	= bonito_irq_disable,
+	.mask_ack = bonito_irq_disable,
+	.unmask	= bonito_irq_enable,
+};
+
+static struct irqaction dma_timeout_irqaction = {
+	.handler	= no_action,
+	.name		= "dma_timeout",
+};
+
+void bonito_irq_init(void)
+{
+	u32 i;
+
+	for (i = BONITO_IRQ_BASE; i < BONITO_IRQ_BASE + 32; i++)
+		set_irq_chip_and_handler(i, &bonito_irq_type, handle_level_irq);
+
+	setup_irq(BONITO_IRQ_BASE + 10, &dma_timeout_irqaction);
+}
diff --git a/arch/mips/loongson/fuloong-2e/cmdline.c b/arch/mips/loongson/fuloong-2e/cmdline.c
new file mode 100644
index 000000000000..75f1b243ee4e
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/cmdline.c
@@ -0,0 +1,52 @@
+/*
+ * Based on Ocelot Linux port, which is
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright 2003 ICT CAS
+ * Author: Michael Guo <guoyi@ict.ac.cn>
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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 <asm/bootinfo.h>
+
+#include <loongson.h>
+
+int prom_argc;
+/* pmon passes arguments in 32bit pointers */
+int *_prom_argv;
+
+void __init prom_init_cmdline(void)
+{
+	int i;
+	long l;
+
+	/* firmware arguments are initialized in head.S */
+	prom_argc = fw_arg0;
+	_prom_argv = (int *)fw_arg1;
+
+	/* arg[0] is "g", the rest is boot parameters */
+	arcs_cmdline[0] = '\0';
+	for (i = 1; i < prom_argc; i++) {
+		l = (long)_prom_argv[i];
+		if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
+		    >= sizeof(arcs_cmdline))
+			break;
+		strcat(arcs_cmdline, ((char *)l));
+		strcat(arcs_cmdline, " ");
+	}
+
+	if ((strstr(arcs_cmdline, "console=")) == NULL)
+		strcat(arcs_cmdline, " console=ttyS0,115200");
+	if ((strstr(arcs_cmdline, "root=")) == NULL)
+		strcat(arcs_cmdline, " root=/dev/hda1");
+}
diff --git a/arch/mips/loongson/fuloong-2e/early_printk.c b/arch/mips/loongson/fuloong-2e/early_printk.c
new file mode 100644
index 000000000000..3e0a6eaa4041
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/early_printk.c
@@ -0,0 +1,39 @@
+/*  early printk support
+ *
+ *  Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
+ *  Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ *  Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ *  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/serial_reg.h>
+
+#include <loongson.h>
+
+#define UART_BASE (BONITO_PCIIO_BASE + 0x3f8)
+
+#define PORT(base, offset) (u8 *)(base + offset)
+
+static inline unsigned int serial_in(phys_addr_t base, int offset)
+{
+	return readb(PORT(base, offset));
+}
+
+static inline void serial_out(phys_addr_t base, int offset, int value)
+{
+	writeb(value, PORT(base, offset));
+}
+
+void prom_putchar(char c)
+{
+	phys_addr_t uart_base =
+		(phys_addr_t) ioremap_nocache(UART_BASE, 8);
+
+	while ((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0)
+		;
+
+	serial_out(uart_base, UART_TX, c);
+}
diff --git a/arch/mips/loongson/fuloong-2e/env.c b/arch/mips/loongson/fuloong-2e/env.c
new file mode 100644
index 000000000000..b9ef50385541
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/env.c
@@ -0,0 +1,58 @@
+/*
+ * Based on Ocelot Linux port, which is
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright 2003 ICT CAS
+ * Author: Michael Guo <guoyi@ict.ac.cn>
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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 <asm/bootinfo.h>
+
+#include <loongson.h>
+
+unsigned long bus_clock, cpu_clock_freq;
+unsigned long memsize, highmemsize;
+
+/* pmon passes arguments in 32bit pointers */
+int *_prom_envp;
+
+#define parse_even_earlier(res, option, p)				\
+do {									\
+	if (strncmp(option, (char *)p, strlen(option)) == 0)		\
+			strict_strtol((char *)p + strlen(option"="),	\
+					10, &res);			\
+} while (0)
+
+void __init prom_init_env(void)
+{
+	long l;
+
+	/* firmware arguments are initialized in head.S */
+	_prom_envp = (int *)fw_arg2;
+
+	l = (long)*_prom_envp;
+	while (l != 0) {
+		parse_even_earlier(bus_clock, "busclock", l);
+		parse_even_earlier(cpu_clock_freq, "cpuclock", l);
+		parse_even_earlier(memsize, "memsize", l);
+		parse_even_earlier(highmemsize, "highmemsize", l);
+		_prom_envp++;
+		l = (long)*_prom_envp;
+	}
+	if (memsize == 0)
+		memsize = 256;
+
+	pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
+		bus_clock, cpu_clock_freq, memsize, highmemsize);
+}
diff --git a/arch/mips/loongson/fuloong-2e/init.c b/arch/mips/loongson/fuloong-2e/init.c
new file mode 100644
index 000000000000..3abe927422a3
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/init.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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/bootmem.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+void __init prom_init(void)
+{
+    /* init base address of io space */
+	set_io_port_base((unsigned long)
+		ioremap(BONITO_PCIIO_BASE, BONITO_PCIIO_SIZE));
+
+	prom_init_cmdline();
+	prom_init_env();
+	prom_init_memory();
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
diff --git a/arch/mips/loongson/fuloong-2e/irq.c b/arch/mips/loongson/fuloong-2e/irq.c
new file mode 100644
index 000000000000..9585f5aa7cce
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/irq.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ *  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/delay.h>
+#include <linux/interrupt.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/i8259.h>
+
+#include <loongson.h>
+/*
+ * the first level int-handler will jump here if it is a bonito irq
+ */
+static void bonito_irqdispatch(void)
+{
+	u32 int_status;
+	int i;
+
+	/* workaround the IO dma problem: let cpu looping to allow DMA finish */
+	int_status = BONITO_INTISR;
+	if (int_status & (1 << 10)) {
+		while (int_status & (1 << 10)) {
+			udelay(1);
+			int_status = BONITO_INTISR;
+		}
+	}
+
+	/* Get pending sources, masked by current enables */
+	int_status = BONITO_INTISR & BONITO_INTEN;
+
+	if (int_status != 0) {
+		i = __ffs(int_status);
+		int_status &= ~(1 << i);
+		do_IRQ(BONITO_IRQ_BASE + i);
+	}
+}
+
+static void i8259_irqdispatch(void)
+{
+	int irq;
+
+	irq = i8259_irq();
+	if (irq >= 0)
+		do_IRQ(irq);
+	else
+		spurious_interrupt();
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+	if (pending & CAUSEF_IP7)
+		do_IRQ(MIPS_CPU_IRQ_BASE + 7);
+	else if (pending & CAUSEF_IP6) /* perf counter loverflow */
+		do_IRQ(LOONGSON2_PERFCNT_IRQ);
+	else if (pending & CAUSEF_IP5)
+		i8259_irqdispatch();
+	else if (pending & CAUSEF_IP2)
+		bonito_irqdispatch();
+	else
+		spurious_interrupt();
+}
+
+static struct irqaction cascade_irqaction = {
+	.handler = no_action,
+	.name = "cascade",
+};
+
+void __init arch_init_irq(void)
+{
+	/*
+	 * Clear all of the interrupts while we change the able around a bit.
+	 * int-handler is not on bootstrap
+	 */
+	clear_c0_status(ST0_IM | ST0_BEV);
+	local_irq_disable();
+
+	/* most bonito irq should be level triggered */
+	BONITO_INTEDGE = BONITO_ICU_SYSTEMERR | BONITO_ICU_MASTERERR |
+		BONITO_ICU_RETRYERR | BONITO_ICU_MBOXES;
+	BONITO_INTSTEER = 0;
+
+	/*
+	 * Mask out all interrupt by writing "1" to all bit position in
+	 * the interrupt reset reg.
+	 */
+	BONITO_INTENCLR = ~0;
+
+	/* init all controller
+	 *   0-15         ------> i8259 interrupt
+	 *   16-23        ------> mips cpu interrupt
+	 *   32-63        ------> bonito irq
+	 */
+
+	/* Sets the first-level interrupt dispatcher. */
+	mips_cpu_irq_init();
+	init_i8259_irqs();
+	bonito_irq_init();
+
+	/* bonito irq at IP2 */
+	setup_irq(MIPS_CPU_IRQ_BASE + 2, &cascade_irqaction);
+	/* 8259 irq at IP5 */
+	setup_irq(MIPS_CPU_IRQ_BASE + 5, &cascade_irqaction);
+}
diff --git a/arch/mips/loongson/fuloong-2e/machtype.c b/arch/mips/loongson/fuloong-2e/machtype.c
new file mode 100644
index 000000000000..e03aa0de6176
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/machtype.c
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+
+const char *get_system_type(void)
+{
+	return "lemote-fuloong-2e-box";
+}
+
diff --git a/arch/mips/loongson/fuloong-2e/mem.c b/arch/mips/loongson/fuloong-2e/mem.c
new file mode 100644
index 000000000000..6a7feb178fa5
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/mem.c
@@ -0,0 +1,36 @@
+/*
+ * 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/fs.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+void __init prom_init_memory(void)
+{
+    add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
+#ifdef CONFIG_64BIT
+    if (highmemsize > 0)
+		add_memory_region(0x20000000, highmemsize << 20, BOOT_MEM_RAM);
+#endif /* CONFIG_64BIT */
+}
+
+/* override of arch/mips/mm/cache.c: __uncached_access */
+int __uncached_access(struct file *file, unsigned long addr)
+{
+	if (file->f_flags & O_SYNC)
+		return 1;
+
+	/*
+	 * On the Lemote Loongson 2e system, the peripheral registers
+	 * reside between 0x1000:0000 and 0x2000:0000.
+	 */
+	return addr >= __pa(high_memory) ||
+		((addr >= 0x10000000) && (addr < 0x20000000));
+}
diff --git a/arch/mips/loongson/fuloong-2e/pci.c b/arch/mips/loongson/fuloong-2e/pci.c
new file mode 100644
index 000000000000..9812c30cc6eb
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/pci.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ *  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/pci.h>
+
+#include <pci.h>
+#include <loongson.h>
+
+static struct resource loongson2e_pci_mem_resource = {
+	.name   = "LOONGSON2E PCI MEM",
+	.start  = LOONGSON2E_PCI_MEM_START,
+	.end    = LOONGSON2E_PCI_MEM_END,
+	.flags  = IORESOURCE_MEM,
+};
+
+static struct resource loongson2e_pci_io_resource = {
+	.name   = "LOONGSON2E PCI IO MEM",
+	.start  = LOONGSON2E_PCI_IO_START,
+	.end    = IO_SPACE_LIMIT,
+	.flags  = IORESOURCE_IO,
+};
+
+static struct pci_controller  loongson2e_pci_controller = {
+	.pci_ops        = &bonito64_pci_ops,
+	.io_resource    = &loongson2e_pci_io_resource,
+	.mem_resource   = &loongson2e_pci_mem_resource,
+	.mem_offset     = 0x00000000UL,
+	.io_offset      = 0x00000000UL,
+};
+
+static void __init setup_pcimap(void)
+{
+	/*
+	 * local to PCI mapping for CPU accessing PCI space
+	 * CPU address space [256M,448M] is window for accessing pci space
+	 * we set pcimap_lo[0,1,2] to map it to pci space[0M,64M], [320M,448M]
+	 *
+	 * pcimap: PCI_MAP2  PCI_Mem_Lo2 PCI_Mem_Lo1 PCI_Mem_Lo0
+	 * 	     [<2G]   [384M,448M] [320M,384M] [0M,64M]
+	 */
+	BONITO_PCIMAP = BONITO_PCIMAP_PCIMAP_2 |
+		BONITO_PCIMAP_WIN(2, BONITO_PCILO2_BASE) |
+		BONITO_PCIMAP_WIN(1, BONITO_PCILO1_BASE) |
+		BONITO_PCIMAP_WIN(0, 0);
+
+	/*
+	 * PCI-DMA to local mapping: [2G,2G+256M] -> [0M,256M]
+	 */
+	BONITO_PCIBASE0 = 0x80000000ul;   /* base: 2G -> mmap: 0M */
+	/* size: 256M, burst transmission, pre-fetch enable, 64bit */
+	LOONGSON_PCI_HIT0_SEL_L = 0xc000000cul;
+	LOONGSON_PCI_HIT0_SEL_H = 0xfffffffful;
+	LOONGSON_PCI_HIT1_SEL_L = 0x00000006ul; /* set this BAR as invalid */
+	LOONGSON_PCI_HIT1_SEL_H = 0x00000000ul;
+	LOONGSON_PCI_HIT2_SEL_L = 0x00000006ul; /* set this BAR as invalid */
+	LOONGSON_PCI_HIT2_SEL_H = 0x00000000ul;
+
+	/* avoid deadlock of PCI reading/writing lock operation */
+	LOONGSON_PCI_ISR4C = 0xd2000001ul;
+
+	/* can not change gnt to break pci transfer when device's gnt not
+	deassert for some broken device */
+	LOONGSON_PXARB_CFG = 0x00fe0105ul;
+}
+
+static int __init pcibios_init(void)
+{
+	setup_pcimap();
+
+	loongson2e_pci_controller.io_map_base = mips_io_port_base;
+
+	register_pci_controller(&loongson2e_pci_controller);
+
+	return 0;
+}
+
+arch_initcall(pcibios_init);
diff --git a/arch/mips/loongson/fuloong-2e/reset.c b/arch/mips/loongson/fuloong-2e/reset.c
new file mode 100644
index 000000000000..c21299af7f64
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/reset.c
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ * Copyright (C) 2009 Lemote, Inc. & Institute of Computing Technology
+ * Author: Zhangjin Wu, wuzj@lemote.com
+ */
+#include <linux/init.h>
+#include <linux/pm.h>
+
+#include <asm/reboot.h>
+
+#include <loongson.h>
+
+static void loongson2e_restart(char *command)
+{
+	/* do preparation for reboot */
+	BONITO_BONGENCFG &= ~(1 << 2);
+	BONITO_BONGENCFG |= (1 << 2);
+
+	/* reboot via jumping to boot base address */
+	((void (*)(void))ioremap_nocache(BONITO_BOOT_BASE, 4)) ();
+}
+
+static void loongson2e_halt(void)
+{
+	while (1)
+		;
+}
+
+static int __init mips_reboot_setup(void)
+{
+	_machine_restart = loongson2e_restart;
+	_machine_halt = loongson2e_halt;
+	pm_power_off = loongson2e_halt;
+
+	return 0;
+}
+
+arch_initcall(mips_reboot_setup);
diff --git a/arch/mips/loongson/fuloong-2e/time.c b/arch/mips/loongson/fuloong-2e/time.c
new file mode 100644
index 000000000000..b13d17174654
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/time.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ *  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 <asm/mc146818-time.h>
+#include <asm/time.h>
+
+#include <loongson.h>
+
+void __init plat_time_init(void)
+{
+	/* setup mips r4k timer */
+	mips_hpt_frequency = cpu_clock_freq / 2;
+}
+
+unsigned long read_persistent_clock(void)
+{
+	return mc146818_get_cmos_time();
+}