[MIPS] PMC MSP71xx core platform

Patch to add core platform support for the PMC-Sierra MSP71xx devices.

Signed-off-by: Marc St-Jean <Marc_St-Jean@pmc-sierra.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 256 insertions, 0 deletions

diff --git a/arch/mips/pmc-sierra/msp71xx/msp_setup.c b/arch/mips/pmc-sierra/msp71xx/msp_setup.c
new file mode 100644
index 000000000000..8f69b789be90
--- /dev/null
+++ b/arch/mips/pmc-sierra/msp71xx/msp_setup.c
@@ -0,0 +1,256 @@
+/*
+ * The generic setup file for PMC-Sierra MSP processors
+ *
+ * Copyright 2005-2007 PMC-Sierra, Inc,
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ * 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 <asm/cacheflush.h>
+#include <asm/r4kcache.h>
+#include <asm/reboot.h>
+#include <asm/time.h>
+
+#include <msp_prom.h>
+#include <msp_regs.h>
+
+#if defined(CONFIG_PMC_MSP7120_GW)
+#include <msp_regops.h>
+#include <msp_gpio.h>
+#define MSP_BOARD_RESET_GPIO	9
+#endif
+
+extern void msp_timer_init(void);
+extern void msp_serial_setup(void);
+extern void pmctwiled_setup(void);
+
+#if defined(CONFIG_PMC_MSP7120_EVAL) || \
+    defined(CONFIG_PMC_MSP7120_GW) || \
+    defined(CONFIG_PMC_MSP7120_FPGA)
+/*
+ * Performs the reset for MSP7120-based boards
+ */
+void msp7120_reset(void)
+{
+	void *start, *end, *iptr;
+	register int i;
+
+	/* Diasble all interrupts */
+	local_irq_disable();
+#ifdef CONFIG_SYS_SUPPORTS_MULTITHREADING
+	dvpe();
+#endif
+
+	/* Cache the reset code of this function */
+	__asm__ __volatile__ (
+		"	.set	push				\n"
+		"	.set	mips3				\n"
+		"	la	%0,startpoint			\n"
+		"	la	%1,endpoint			\n"
+		"	.set	pop				\n"
+		: "=r" (start), "=r" (end)
+		:
+	);
+
+	for (iptr = (void *)((unsigned int)start & ~(L1_CACHE_BYTES - 1));
+	     iptr < end; iptr += L1_CACHE_BYTES)
+		cache_op(Fill, iptr);
+
+	__asm__ __volatile__ (
+		"startpoint:					\n"
+	);
+
+	/* Put the DDRC into self-refresh mode */
+	DDRC_INDIRECT_WRITE(DDRC_CTL(10), 0xb, 1 << 16);
+
+	/*
+	 * IMPORTANT!
+	 * DO NOT do anything from here on out that might even
+	 * think about fetching from RAM - i.e., don't call any
+	 * non-inlined functions, and be VERY sure that any inline
+	 * functions you do call do NOT access any sort of RAM
+	 * anywhere!
+	 */
+
+	/* Wait a bit for the DDRC to settle */
+	for (i = 0; i < 100000000; i++);
+
+#if defined(CONFIG_PMC_MSP7120_GW)
+	/*
+	 * Set GPIO 9 HI, (tied to board reset logic)
+	 * GPIO 9 is the 4th GPIO of register 3
+	 *
+	 * NOTE: We cannot use the higher-level msp_gpio_mode()/out()
+	 * as GPIO char driver may not be enabled and it would look up
+	 * data inRAM!
+	 */
+	set_value_reg32(GPIO_CFG3_REG,
+			basic_mode_mask(MSP_BOARD_RESET_GPIO),
+			basic_mode(MSP_GPIO_OUTPUT, MSP_BOARD_RESET_GPIO));
+	set_reg32(GPIO_DATA3_REG,
+			basic_data_mask(MSP_BOARD_RESET_GPIO));
+
+	/*
+	 * In case GPIO9 doesn't reset the board (jumper configurable!)
+	 * fallback to device reset below.
+	 */
+#endif
+	/* Set bit 1 of the MSP7120 reset register */
+	*RST_SET_REG = 0x00000001;
+
+	__asm__ __volatile__ (
+		"endpoint:					\n"
+	);
+}
+#endif
+
+void msp_restart(char *command)
+{
+	printk(KERN_WARNING "Now rebooting .......\n");
+
+#if defined(CONFIG_PMC_MSP7120_EVAL) || \
+    defined(CONFIG_PMC_MSP7120_GW) || \
+    defined(CONFIG_PMC_MSP7120_FPGA)
+	msp7120_reset();
+#else
+	/* No chip-specific reset code, just jump to the ROM reset vector */
+	set_c0_status(ST0_BEV | ST0_ERL);
+	change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
+	flush_cache_all();
+	write_c0_wired(0);
+
+	__asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
+#endif
+}
+
+void msp_halt(void)
+{
+	printk(KERN_WARNING "\n** You can safely turn off the power\n");
+	while (1)
+		/* If possible call official function to get CPU WARs */
+		if (cpu_wait)
+			(*cpu_wait)();
+		else
+			__asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
+}
+
+void msp_power_off(void)
+{
+	msp_halt();
+}
+
+void __init plat_mem_setup(void)
+{
+	_machine_restart = msp_restart;
+	_machine_halt = msp_halt;
+	pm_power_off = msp_power_off;
+
+	board_time_init = msp_timer_init;
+}
+
+void __init prom_init(void)
+{
+	unsigned long family;
+	unsigned long revision;
+
+	prom_argc = fw_arg0;
+	prom_argv = (char **)fw_arg1;
+	prom_envp = (char **)fw_arg2;
+
+	/*
+	 * Someday we can use this with PMON2000 to get a
+	 * platform call prom routines for output etc. without
+	 * having to use grody hacks.  For now it's unused.
+	 *
+	 * struct callvectors *cv = (struct callvectors *) fw_arg3;
+	 */
+	family = identify_family();
+	revision = identify_revision();
+
+	switch (family)	{
+	case FAMILY_FPGA:
+		if (FPGA_IS_MSP4200(revision)) {
+			/* Old-style revision ID */
+			mips_machgroup = MACH_GROUP_MSP;
+			mips_machtype = MACH_MSP4200_FPGA;
+		} else {
+			mips_machgroup = MACH_GROUP_MSP;
+			mips_machtype = MACH_MSP_OTHER;
+		}
+		break;
+
+	case FAMILY_MSP4200:
+		mips_machgroup = MACH_GROUP_MSP;
+#if defined(CONFIG_PMC_MSP4200_EVAL)
+		mips_machtype  = MACH_MSP4200_EVAL;
+#elif defined(CONFIG_PMC_MSP4200_GW)
+		mips_machtype  = MACH_MSP4200_GW;
+#else
+		mips_machtype = MACH_MSP_OTHER;
+#endif
+		break;
+
+	case FAMILY_MSP4200_FPGA:
+		mips_machgroup = MACH_GROUP_MSP;
+		mips_machtype  = MACH_MSP4200_FPGA;
+		break;
+
+	case FAMILY_MSP7100:
+		mips_machgroup = MACH_GROUP_MSP;
+#if defined(CONFIG_PMC_MSP7120_EVAL)
+		mips_machtype = MACH_MSP7120_EVAL;
+#elif defined(CONFIG_PMC_MSP7120_GW)
+		mips_machtype = MACH_MSP7120_GW;
+#else
+		mips_machtype = MACH_MSP_OTHER;
+#endif
+		break;
+
+	case FAMILY_MSP7100_FPGA:
+		mips_machgroup = MACH_GROUP_MSP;
+		mips_machtype  = MACH_MSP7120_FPGA;
+		break;
+
+	default:
+		/* we don't recognize the machine */
+		mips_machgroup = MACH_GROUP_UNKNOWN;
+		mips_machtype  = MACH_UNKNOWN;
+		break;
+	}
+
+	/* make sure we have the right initialization routine - sanity */
+	if (mips_machgroup != MACH_GROUP_MSP) {
+		ppfinit("Unknown machine group in a "
+			"MSP initialization routine\n");
+		panic("***Bogosity factor five***, exiting\n");
+	}
+
+	prom_init_cmdline();
+
+	prom_meminit();
+
+	/*
+	 * Sub-system setup follows.
+	 * Setup functions can  either be called here or using the
+	 * subsys_initcall mechanism (i.e. see msp_pci_setup). The
+	 * order in which they are called can be changed by using the
+	 * link order in arch/mips/pmc-sierra/msp71xx/Makefile.
+	 *
+	 * NOTE: Please keep sub-system specific initialization code
+	 * in separate specific files.
+	 */
+	msp_serial_setup();
+
+#ifdef CONFIG_PMCTWILED
+	/*
+	 * Setup LED states before the subsys_initcall loads other
+	 * dependant drivers/modules.
+	 */
+	pmctwiled_setup();
+#endif
+}