// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Freescale Lite5200 board support
*
* Written by : Grant Likely < grant . likely @ secretlab . ca >
*
* Copyright ( C ) Secret Lab Technologies Ltd . 2006 . All rights reserved .
* Copyright 2006 Freescale Semiconductor , Inc . All rights reserved .
*
* Description :
*/
#undef DEBUG
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>
#include <asm /time.h>
#include <asm /io.h>
#include <asm /machdep.h>
#include <asm /mpc52xx.h>
/* ************************************************************************
*
* Setup the architecture
*
*/
/* mpc5200 device tree match tables */
static const struct of_device_id mpc5200_cdm_ids[] __initconst = {
{ .compatible = "fsl,mpc5200-cdm" , },
{ .compatible = "mpc5200-cdm" , },
{}
};
static const struct of_device_id mpc5200_gpio_ids[] __initconst = {
{ .compatible = "fsl,mpc5200-gpio" , },
{ .compatible = "mpc5200-gpio" , },
{}
};
/*
* Fix clock configuration .
*
* Firmware is supposed to be responsible for this . If you are creating a
* new board port , do * NOT * duplicate this code . Fix your boot firmware
* to set it correctly in the first place
*/
static void __init
lite5200_fix_clock_config(void )
{
struct device_node *np;
struct mpc52xx_cdm __iomem *cdm;
/* Map zones */
np = of_find_matching_node(NULL, mpc5200_cdm_ids);
cdm = of_iomap(np, 0 );
of_node_put(np);
if (!cdm) {
printk(KERN_ERR "%s() failed; expect abnormal behaviour\n" ,
__func__);
return ;
}
/* Use internal 48 Mhz */
out_8(&cdm->ext_48mhz_en, 0 x00);
out_8(&cdm->fd_enable, 0 x01);
if (in_be32(&cdm->rstcfg) & 0 x40) /* Assumes 33Mhz clock */
out_be16(&cdm->fd_counters, 0 x0001);
else
out_be16(&cdm->fd_counters, 0 x5555);
/* Unmap the regs */
iounmap(cdm);
}
/*
* Fix setting of port_config register .
*
* Firmware is supposed to be responsible for this . If you are creating a
* new board port , do * NOT * duplicate this code . Fix your boot firmware
* to set it correctly in the first place
*/
static void __init
lite5200_fix_port_config(void )
{
struct device_node *np;
struct mpc52xx_gpio __iomem *gpio;
u32 port_config;
np = of_find_matching_node(NULL, mpc5200_gpio_ids);
gpio = of_iomap(np, 0 );
of_node_put(np);
if (!gpio) {
printk(KERN_ERR "%s() failed. expect abnormal behavior\n" ,
__func__);
return ;
}
/* Set port config */
port_config = in_be32(&gpio->port_config);
port_config &= ~0 x00800000; /* 48Mhz internal, pin is GPIO */
port_config &= ~0 x00007000; /* USB port : Differential mode */
port_config |= 0 x00001000; /* USB 1 only */
port_config &= ~0 x03000000; /* ATA CS is on csb_4/5 */
port_config |= 0 x01000000;
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 */
iounmap(gpio);
}
#ifdef CONFIG_PM
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
*/
/* set ports to "power switched" and "powered at the same time"
* USB Rh descriptor A: NPS = 0, PSM = 0 */
out_be32(mbar + 0 x1048, in_be32(mbar + 0 x1048) & ~0 x300);
/* USB Rh status: LPS = 1 - turn off power */
out_be32(mbar + 0 x1050, 0 x00000001);
}
static void lite5200_resume_finish(void __iomem *mbar)
{
/* USB Rh status: LPSC = 1 - turn on power */
out_be32(mbar + 0 x1050, 0 x00010000);
}
#endif
static void __init lite5200_setup_arch(void )
{
if (ppc_md.progress)
ppc_md.progress("lite5200_setup_arch()" , 0 );
/* Map important registers from the internal memory map */
mpc52xx_map_common_devices();
/* Some mpc5200 & mpc5200b related configuration */
mpc5200_setup_xlb_arbiter();
/* Fix things that firmware should have done. */
lite5200_fix_clock_config();
lite5200_fix_port_config();
#ifdef CONFIG_PM
mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
lite5200_pm_init();
#endif
}
static const char * const board[] __initconst = {
"fsl,lite5200" ,
"fsl,lite5200b" ,
NULL,
};
define_machine(lite5200) {
.name = "lite5200" ,
.compatibles = board,
.setup_arch = lite5200_setup_arch,
.discover_phbs = mpc52xx_setup_pci,
.init = mpc52xx_declare_of_platform_devices,
.init_IRQ = mpc52xx_init_irq,
.get_irq = mpc52xx_get_irq,
.restart = mpc52xx_restart,
};
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