You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
198 lines
4.6 KiB
198 lines
4.6 KiB
/*
|
|
* Freescale Lite5200 board support
|
|
*
|
|
* Written by: Grant Likely <grant.likely@secretlab.ca>
|
|
*
|
|
* Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
|
|
* Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
|
|
*
|
|
* Description:
|
|
* 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.
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <linux/stddef.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kdev_t.h>
|
|
#include <linux/major.h>
|
|
#include <linux/console.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/initrd.h>
|
|
|
|
#include <asm/system.h>
|
|
#include <asm/atomic.h>
|
|
#include <asm/time.h>
|
|
#include <asm/io.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/ipic.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/udbg.h>
|
|
#include <sysdev/fsl_soc.h>
|
|
#include <asm/of_platform.h>
|
|
|
|
#include <asm/mpc52xx.h>
|
|
|
|
/* ************************************************************************
|
|
*
|
|
* Setup the architecture
|
|
*
|
|
*/
|
|
|
|
static void __init
|
|
lite5200_setup_cpu(void)
|
|
{
|
|
struct mpc52xx_gpio __iomem *gpio;
|
|
u32 port_config;
|
|
|
|
/* Map zones */
|
|
gpio = mpc52xx_find_and_map("mpc5200-gpio");
|
|
if (!gpio) {
|
|
printk(KERN_ERR __FILE__ ": "
|
|
"Error while mapping GPIO register for port config. "
|
|
"Expect some abnormal behavior\n");
|
|
goto error;
|
|
}
|
|
|
|
/* Set port config */
|
|
port_config = in_be32(&gpio->port_config);
|
|
|
|
port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */
|
|
|
|
port_config &= ~0x00007000; /* USB port : Differential mode */
|
|
port_config |= 0x00001000; /* USB 1 only */
|
|
|
|
port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */
|
|
port_config |= 0x01000000;
|
|
|
|
pr_debug("port_config: old:%x new:%x\n",
|
|
in_be32(&gpio->port_config), port_config);
|
|
out_be32(&gpio->port_config, port_config);
|
|
|
|
/* Unmap zone */
|
|
error:
|
|
iounmap(gpio);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static u32 descr_a;
|
|
static void lite5200_suspend_prepare(void __iomem *mbar)
|
|
{
|
|
u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */
|
|
u8 level = 0; /* wakeup on low level */
|
|
mpc52xx_set_wakeup_gpio(pin, level);
|
|
|
|
/*
|
|
* power down usb port
|
|
* this needs to be called before of-ohci suspend code
|
|
*/
|
|
descr_a = in_be32(mbar + 0x1048);
|
|
out_be32(mbar + 0x1048, (descr_a & ~0x200) | 0x100);
|
|
}
|
|
|
|
static void lite5200_resume_finish(void __iomem *mbar)
|
|
{
|
|
out_be32(mbar + 0x1048, descr_a);
|
|
}
|
|
#endif
|
|
|
|
static void __init lite5200_setup_arch(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
if (ppc_md.progress)
|
|
ppc_md.progress("lite5200_setup_arch()", 0);
|
|
|
|
np = of_find_node_by_type(NULL, "cpu");
|
|
if (np) {
|
|
const unsigned int *fp =
|
|
of_get_property(np, "clock-frequency", NULL);
|
|
if (fp != 0)
|
|
loops_per_jiffy = *fp / HZ;
|
|
else
|
|
loops_per_jiffy = 50000000 / HZ;
|
|
of_node_put(np);
|
|
}
|
|
|
|
/* CPU & Port mux setup */
|
|
mpc52xx_setup_cpu(); /* Generic */
|
|
lite5200_setup_cpu(); /* Platorm specific */
|
|
|
|
#ifdef CONFIG_PM
|
|
mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
|
|
mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
|
|
mpc52xx_pm_init();
|
|
#endif
|
|
|
|
#ifdef CONFIG_PCI
|
|
np = of_find_node_by_type(NULL, "pci");
|
|
if (np) {
|
|
mpc52xx_add_bridge(np);
|
|
of_node_put(np);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (initrd_start)
|
|
ROOT_DEV = Root_RAM0;
|
|
else
|
|
#endif
|
|
#ifdef CONFIG_ROOT_NFS
|
|
ROOT_DEV = Root_NFS;
|
|
#else
|
|
ROOT_DEV = Root_HDA1;
|
|
#endif
|
|
|
|
}
|
|
|
|
static void lite5200_show_cpuinfo(struct seq_file *m)
|
|
{
|
|
struct device_node* np = of_find_all_nodes(NULL);
|
|
const char *model = NULL;
|
|
|
|
if (np)
|
|
model = of_get_property(np, "model", NULL);
|
|
|
|
seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
|
|
seq_printf(m, "machine\t\t: %s\n", model ? model : "unknown");
|
|
|
|
of_node_put(np);
|
|
}
|
|
|
|
/*
|
|
* Called very early, MMU is off, device-tree isn't unflattened
|
|
*/
|
|
static int __init lite5200_probe(void)
|
|
{
|
|
unsigned long node = of_get_flat_dt_root();
|
|
const char *model = of_get_flat_dt_prop(node, "model", NULL);
|
|
|
|
if (!of_flat_dt_is_compatible(node, "fsl,lite5200") &&
|
|
!of_flat_dt_is_compatible(node, "fsl,lite5200b"))
|
|
return 0;
|
|
pr_debug("%s board found\n", model ? model : "unknown");
|
|
|
|
return 1;
|
|
}
|
|
|
|
define_machine(lite5200) {
|
|
.name = "lite5200",
|
|
.probe = lite5200_probe,
|
|
.setup_arch = lite5200_setup_arch,
|
|
.init = mpc52xx_declare_of_platform_devices,
|
|
.init_IRQ = mpc52xx_init_irq,
|
|
.get_irq = mpc52xx_get_irq,
|
|
.show_cpuinfo = lite5200_show_cpuinfo,
|
|
.calibrate_decr = generic_calibrate_decr,
|
|
};
|
|
|