[MIPS] Wind River 4KC PPMC Eval Board Support

    
Support for the GT-64120-based Wind River 4KC PPMC Evaluation board.

Signed-off-by: Rongkai.Zhan <Rongkai.zhan@windriver.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 173 insertions, 0 deletions

diff --git a/arch/mips/gt64120/wrppmc/setup.c b/arch/mips/gt64120/wrppmc/setup.c
new file mode 100644
index 0000000..20c591e
--- /dev/null
+++ b/arch/mips/gt64120/wrppmc/setup.c
@@ -0,0 +1,173 @@
+/*
+ * setup.c: Setup pointers to hardware dependent routines.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2006, Wind River System Inc. Rongkai.zhan <rongkai.zhan@windriver.com>
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/pm.h>
+
+#include <asm/io.h>
+#include <asm/bootinfo.h>
+#include <asm/reboot.h>
+#include <asm/time.h>
+#include <asm/gt64120.h>
+
+unsigned long gt64120_base = KSEG1ADDR(0x14000000);
+
+#ifdef WRPPMC_EARLY_DEBUG
+
+static volatile unsigned char * wrppmc_led = \
+	(volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
+
+/*
+ * PPMC LED control register:
+ * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
+ * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
+ * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
+ */
+void wrppmc_led_on(int mask)
+{
+	unsigned char value = *wrppmc_led;
+
+	value &= (0xF8 | mask);
+	*wrppmc_led = value;
+}
+
+/* If mask = 0, turn off all LEDs */
+void wrppmc_led_off(int mask)
+{
+	unsigned char value = *wrppmc_led;
+
+	value |= (0x7 & mask);
+	*wrppmc_led = value;
+}
+
+/*
+ * We assume that bootloader has initialized UART16550 correctly
+ */
+void __init wrppmc_early_putc(char ch)
+{
+	static volatile unsigned char *wrppmc_uart = \
+		(volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
+	unsigned char value;
+
+	/* Wait until Transmit-Holding-Register is empty */
+	while (1) {
+		value = *(wrppmc_uart + 5);
+		if (value & 0x20)
+			break;
+	}
+
+	*wrppmc_uart = ch;
+}
+
+void __init wrppmc_early_printk(const char *fmt, ...)
+{
+	static char pbuf[256] = {'\0', };
+	char *ch = pbuf;
+	va_list args;
+	unsigned int i;
+
+	memset(pbuf, 0, 256);
+	va_start(args, fmt);
+	i = vsprintf(pbuf, fmt, args);
+	va_end(args);
+
+	/* Print the string */
+	while (*ch != '\0') {
+		wrppmc_early_putc(*ch);
+		/* if print '\n', also print '\r' */
+		if (*ch++ == '\n')
+			wrppmc_early_putc('\r');
+	}
+}
+#endif /* WRPPMC_EARLY_DEBUG */
+
+unsigned long __init prom_free_prom_memory(void)
+{
+	return 0;
+}
+
+#ifdef CONFIG_SERIAL_8250
+static void wrppmc_setup_serial(void)
+{
+	struct uart_port up;
+
+	memset(&up, 0x00, sizeof(struct uart_port));
+
+	/*
+	 * A note about mapbase/membase
+	 * -) mapbase is the physical address of the IO port.
+	 * -) membase is an 'ioremapped' cookie.
+	 */
+	up.line = 0;
+	up.type = PORT_16550;
+	up.iotype = UPIO_MEM;
+	up.mapbase = WRPPMC_UART16550_BASE;
+	up.membase = ioremap(up.mapbase, 8);
+	up.irq = WRPPMC_UART16550_IRQ;
+	up.uartclk = WRPPMC_UART16550_CLOCK;
+	up.flags = UPF_SKIP_TEST/* | UPF_BOOT_AUTOCONF */;
+	up.regshift = 0;
+
+	early_serial_setup(&up);
+}
+#endif
+
+void __init plat_setup(void)
+{
+	extern void wrppmc_time_init(void);
+	extern void wrppmc_timer_setup(struct irqaction *);
+	extern void wrppmc_machine_restart(char *command);
+	extern void wrppmc_machine_halt(void);
+	extern void wrppmc_machine_power_off(void);
+
+	_machine_restart = wrppmc_machine_restart;
+	_machine_halt	 = wrppmc_machine_halt;
+	pm_power_off	 = wrppmc_machine_power_off;
+
+	/* Use MIPS Count/Compare Timer */
+	board_time_init   = wrppmc_time_init;
+	board_timer_setup = wrppmc_timer_setup;
+
+	/* This makes the operations of 'in/out[bwl]' to the
+	 * physical address ( < KSEG0) can work via KSEG1
+	 */
+	set_io_port_base(KSEG1);
+
+#ifdef CONFIG_SERIAL_8250
+	wrppmc_setup_serial();
+#endif
+}
+
+const char *get_system_type(void)
+{
+	return "Wind River PPMC (GT64120)";
+}
+
+/*
+ * Initializes basic routines and structures pointers, memory size (as
+ * given by the bios and saves the command line.
+ */
+void __init prom_init(void)
+{
+	mips_machgroup = MACH_GROUP_GALILEO;
+	mips_machtype = MACH_EV64120A;
+
+	add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
+	add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
+
+	wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
+			WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));
+}