Fixed MTP to work with TWRP

arch/powerpc/platforms/embedded6xx/wii.c

@@ -0,0 +1,252 @@
+/*
+ * arch/powerpc/platforms/embedded6xx/wii.c
+ *
+ * Nintendo Wii board-specific support
+ * Copyright (C) 2008-2009 The GameCube Linux Team
+ * Copyright (C) 2008,2009 Albert Herranz
+ *
+ * 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.
+ *
+ */
+#define DRV_MODULE_NAME "wii"
+#define pr_fmt(fmt) DRV_MODULE_NAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/of_platform.h>
+#include <linux/memblock.h>
+#include <mm/mmu_decl.h>
+
+#include <asm/io.h>
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/time.h>
+#include <asm/udbg.h>
+
+#include "flipper-pic.h"
+#include "hlwd-pic.h"
+#include "usbgecko_udbg.h"
+
+/* control block */
+#define HW_CTRL_COMPATIBLE	"nintendo,hollywood-control"
+
+#define HW_CTRL_RESETS		0x94
+#define HW_CTRL_RESETS_SYS	(1<<0)
+
+/* gpio */
+#define HW_GPIO_COMPATIBLE	"nintendo,hollywood-gpio"
+
+#define HW_GPIO_BASE(idx)	(idx * 0x20)
+#define HW_GPIO_OUT(idx)	(HW_GPIO_BASE(idx) + 0)
+#define HW_GPIO_DIR(idx)	(HW_GPIO_BASE(idx) + 4)
+
+#define HW_GPIO_SHUTDOWN	(1<<1)
+#define HW_GPIO_SLOT_LED	(1<<5)
+#define HW_GPIO_SENSOR_BAR	(1<<8)
+
+
+static void __iomem *hw_ctrl;
+static void __iomem *hw_gpio;
+
+unsigned long wii_hole_start;
+unsigned long wii_hole_size;
+
+
+static int __init page_aligned(unsigned long x)
+{
+	return !(x & (PAGE_SIZE-1));
+}
+
+void __init wii_memory_fixups(void)
+{
+	struct memblock_region *p = memblock.memory.regions;
+
+	/*
+	 * This is part of a workaround to allow the use of two
+	 * discontinuous RAM ranges on the Wii, even if this is
+	 * currently unsupported on 32-bit PowerPC Linux.
+	 *
+	 * We coalesce the two memory ranges of the Wii into a
+	 * single range, then create a reservation for the "hole"
+	 * between both ranges.
+	 */
+
+	BUG_ON(memblock.memory.cnt != 2);
+	BUG_ON(!page_aligned(p[0].base) || !page_aligned(p[1].base));
+
+	/* trim unaligned tail */
+	memblock_remove(ALIGN(p[1].base + p[1].size, PAGE_SIZE),
+			(phys_addr_t)ULLONG_MAX);
+
+	/* determine hole, add & reserve them */
+	wii_hole_start = ALIGN(p[0].base + p[0].size, PAGE_SIZE);
+	wii_hole_size = p[1].base - wii_hole_start;
+	memblock_add(wii_hole_start, wii_hole_size);
+	memblock_reserve(wii_hole_start, wii_hole_size);
+
+	BUG_ON(memblock.memory.cnt != 1);
+	__memblock_dump_all();
+
+	/* allow ioremapping the address space in the hole */
+	__allow_ioremap_reserved = 1;
+}
+
+unsigned long __init wii_mmu_mapin_mem2(unsigned long top)
+{
+	unsigned long delta, size, bl;
+	unsigned long max_size = (256<<20);
+
+	/* MEM2 64MB@0x10000000 */
+	delta = wii_hole_start + wii_hole_size;
+	size = top - delta;
+	for (bl = 128<<10; bl < max_size; bl <<= 1) {
+		if (bl * 2 > size)
+			break;
+	}
+	setbat(4, PAGE_OFFSET+delta, delta, bl, PAGE_KERNEL_X);
+	return delta + bl;
+}
+
+static void wii_spin(void)
+{
+	local_irq_disable();
+	for (;;)
+		cpu_relax();
+}
+
+static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible)
+{
+	void __iomem *hw_regs = NULL;
+	struct device_node *np;
+	struct resource res;
+	int error = -ENODEV;
+
+	np = of_find_compatible_node(NULL, NULL, compatible);
+	if (!np) {
+		pr_err("no compatible node found for %s\n", compatible);
+		goto out;
+	}
+	error = of_address_to_resource(np, 0, &res);
+	if (error) {
+		pr_err("no valid reg found for %s\n", np->name);
+		goto out_put;
+	}
+
+	hw_regs = ioremap(res.start, resource_size(&res));
+	if (hw_regs) {
+		pr_info("%s at 0x%08x mapped to 0x%p\n", name,
+			res.start, hw_regs);
+	}
+
+out_put:
+	of_node_put(np);
+out:
+	return hw_regs;
+}
+
+static void __init wii_setup_arch(void)
+{
+	hw_ctrl = wii_ioremap_hw_regs("hw_ctrl", HW_CTRL_COMPATIBLE);
+	hw_gpio = wii_ioremap_hw_regs("hw_gpio", HW_GPIO_COMPATIBLE);
+	if (hw_gpio) {
+		/* turn off the front blue led and IR light */
+		clrbits32(hw_gpio + HW_GPIO_OUT(0),
+			  HW_GPIO_SLOT_LED | HW_GPIO_SENSOR_BAR);
+	}
+}
+
+static void wii_restart(char *cmd)
+{
+	local_irq_disable();
+
+	if (hw_ctrl) {
+		/* clear the system reset pin to cause a reset */
+		clrbits32(hw_ctrl + HW_CTRL_RESETS, HW_CTRL_RESETS_SYS);
+	}
+	wii_spin();
+}
+
+static void wii_power_off(void)
+{
+	local_irq_disable();
+
+	if (hw_gpio) {
+		/* make sure that the poweroff GPIO is configured as output */
+		setbits32(hw_gpio + HW_GPIO_DIR(1), HW_GPIO_SHUTDOWN);
+
+		/* drive the poweroff GPIO high */
+		setbits32(hw_gpio + HW_GPIO_OUT(1), HW_GPIO_SHUTDOWN);
+	}
+	wii_spin();
+}
+
+static void wii_halt(void)
+{
+	if (ppc_md.restart)
+		ppc_md.restart(NULL);
+	wii_spin();
+}
+
+static void __init wii_init_early(void)
+{
+	ug_udbg_init();
+}
+
+static void __init wii_pic_probe(void)
+{
+	flipper_pic_probe();
+	hlwd_pic_probe();
+}
+
+static int __init wii_probe(void)
+{
+	unsigned long dt_root;
+
+	dt_root = of_get_flat_dt_root();
+	if (!of_flat_dt_is_compatible(dt_root, "nintendo,wii"))
+		return 0;
+
+	return 1;
+}
+
+static void wii_shutdown(void)
+{
+	hlwd_quiesce();
+	flipper_quiesce();
+}
+
+define_machine(wii) {
+	.name			= "wii",
+	.probe			= wii_probe,
+	.init_early		= wii_init_early,
+	.setup_arch		= wii_setup_arch,
+	.restart		= wii_restart,
+	.power_off		= wii_power_off,
+	.halt			= wii_halt,
+	.init_IRQ		= wii_pic_probe,
+	.get_irq		= flipper_pic_get_irq,
+	.calibrate_decr		= generic_calibrate_decr,
+	.progress		= udbg_progress,
+	.machine_shutdown	= wii_shutdown,
+};
+
+static const struct of_device_id wii_of_bus[] = {
+	{ .compatible = "nintendo,hollywood", },
+	{ },
+};
+
+static int __init wii_device_probe(void)
+{
+	if (!machine_is(wii))
+		return 0;
+
+	of_platform_bus_probe(NULL, wii_of_bus, NULL);
+	return 0;
+}
+device_initcall(wii_device_probe);
+