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181 lines
4.1 KiB
181 lines
4.1 KiB
/*
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* arch/xtensa/platforms/xt2000/setup.c
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*
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* Platform specific functions for the XT2000 board.
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*
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* Authors: Chris Zankel <chris@zankel.net>
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* Joe Taylor <joe@tensilica.com>
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*
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* Copyright 2001 - 2004 Tensilica Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/reboot.h>
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#include <linux/kdev_t.h>
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#include <linux/types.h>
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#include <linux/major.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/stringify.h>
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#include <linux/platform_device.h>
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#include <linux/serial.h>
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#include <linux/serial_8250.h>
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#include <asm/processor.h>
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#include <asm/platform.h>
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#include <asm/bootparam.h>
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#include <platform/hardware.h>
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#include <platform/serial.h>
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/* Assumes s points to an 8-chr string. No checking for NULL. */
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static void led_print (int f, char *s)
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{
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unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
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int i;
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for (i = f; i < 8; i++)
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if ((*led_addr++ = *s++) == 0)
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break;
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}
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void platform_halt(void)
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{
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led_print (0, " HALT ");
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local_irq_disable();
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while (1);
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}
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void platform_power_off(void)
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{
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led_print (0, "POWEROFF");
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local_irq_disable();
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while (1);
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}
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void platform_restart(void)
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{
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/* Flush and reset the mmu, simulate a processor reset, and
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* jump to the reset vector. */
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__asm__ __volatile__ ("movi a2, 15\n\t"
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"wsr a2, " __stringify(ICOUNTLEVEL) "\n\t"
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"movi a2, 0\n\t"
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"wsr a2, " __stringify(ICOUNT) "\n\t"
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"wsr a2, " __stringify(IBREAKENABLE) "\n\t"
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"wsr a2, " __stringify(LCOUNT) "\n\t"
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"movi a2, 0x1f\n\t"
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"wsr a2, " __stringify(PS) "\n\t"
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"isync\n\t"
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"jx %0\n\t"
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:
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: "a" (XCHAL_RESET_VECTOR_VADDR)
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: "a2"
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);
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/* control never gets here */
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}
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void __init platform_setup(char** cmdline)
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{
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led_print (0, "LINUX ");
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}
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/* early initialization */
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extern sysmem_info_t __initdata sysmem;
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void platform_init(bp_tag_t* first)
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{
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/* Set default memory block if not provided by the bootloader. */
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if (sysmem.nr_banks == 0) {
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sysmem.nr_banks = 1;
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sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
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sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
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+ PLATFORM_DEFAULT_MEM_SIZE;
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}
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}
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/* Heartbeat. Let the LED blink. */
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void platform_heartbeat(void)
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{
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static int i=0, t = 0;
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if (--t < 0)
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{
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t = 59;
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led_print(7, i ? ".": " ");
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i ^= 1;
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}
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}
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//#define RS_TABLE_SIZE 2
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//#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)
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#define _SERIAL_PORT(_base,_irq) \
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{ \
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.mapbase = (_base), \
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.membase = (void*)(_base), \
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.irq = (_irq), \
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.uartclk = DUART16552_XTAL_FREQ, \
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.iotype = UPIO_MEM, \
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.flags = UPF_BOOT_AUTOCONF, \
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.regshift = 2, \
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}
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static struct plat_serial8250_port xt2000_serial_data[] = {
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#if XCHAL_HAVE_BE
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_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
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_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
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#else
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_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
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_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
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#endif
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{ }
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};
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static struct platform_device xt2000_serial8250_device = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev = {
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.platform_data = xt2000_serial_data,
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},
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};
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static struct resource xt2000_sonic_res[] = {
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{
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.start = SONIC83934_ADDR,
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.end = SONIC83934_ADDR + 0xff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = SONIC83934_INTNUM,
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.end = SONIC83934_INTNUM,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device xt2000_sonic_device = {
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.name = "xtsonic",
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.num_resources = ARRAY_SIZE(xt2000_sonic_res),
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.resource = xt2000_sonic_res,
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};
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static int __init xt2000_setup_devinit(void)
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{
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platform_device_register(&xt2000_serial8250_device);
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platform_device_register(&xt2000_sonic_device);
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return 0;
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}
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device_initcall(xt2000_setup_devinit);
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