/*
* MPC8272 ADS board support
*
* Copyright 2007 Freescale Semiconductor, Inc.
* Author: Scott Wood <scottwood@freescale.com>
*
* Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
* Copyright (c) 2006 MontaVista Software, Inc.
*
* 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 <linux/init.h>
#include <linux/interrupt.h>
#include <linux/fsl_devices.h>
#include <linux/of_address.h>
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <linux/io.h>
#include <asm/cpm2.h>
#include <asm/udbg.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <platforms/82xx/pq2.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/cpm2_pic.h>
#include "pq2.h"
static void __init mpc8272_ads_pic_init(void)
{
struct device_node *np = of_find_compatible_node(NULL, NULL,
"fsl,cpm2-pic");
if (!np) {
printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
return;
}
cpm2_pic_init(np);
of_node_put(np);
/* Initialize stuff for the 82xx CPLD IC and install demux */
pq2ads_pci_init_irq();
}
struct cpm_pin {
int port, pin, flags;
};
static struct cpm_pin mpc8272_ads_pins[] = {
/* SCC1 */
{3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
{3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
/* SCC4 */
{3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
/* FCC1 */
{0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
{0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
{0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
{2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
/* FCC2 */
{1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
{1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
/* I2C */
{3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
{3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
/* USB */
{2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
{3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
{3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
};
static void __init init_ioports(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(mpc8272_ads_pins); i++) {
struct cpm_pin *pin = &mpc8272_ads_pins[i];
cpm2_set_pin(pin->port, pin->pin, pin->flags);
}
cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX);
cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_TX);
cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK15, CPM_CLK_RX);
cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK16, CPM_CLK_TX);
}
static void __init mpc8272_ads_setup_arch(void)
{
struct device_node *np;
__be32 __iomem *bcsr;
if (ppc_md.progress)
ppc_md.progress("mpc8272_ads_setup_arch()", 0);
cpm2_reset();
np = of_find_compatible_node(NULL, NULL, "fsl,mpc8272ads-bcsr");
if (!np) {
printk(KERN_ERR "No bcsr in device tree\n");
return;
}
bcsr = of_iomap(np, 0);
of_node_put(np);
if (!bcsr) {
printk(KERN_ERR "Cannot map BCSR registers\n");
return;
}
#define BCSR1_FETHIEN 0x08000000
#define BCSR1_FETH_RST 0x04000000
#define BCSR1_RS232_EN1 0x02000000
#define BCSR1_RS232_EN2 0x01000000
#define BCSR3_USB_nEN 0x80000000
#define BCSR3_FETHIEN2 0x10000000
#define BCSR3_FETH2_RST 0x08000000
clrbits32(&bcsr[1], BCSR1_RS232_EN1 | BCSR1_RS232_EN2 | BCSR1_FETHIEN);
setbits32(&bcsr[1], BCSR1_FETH_RST);
clrbits32(&bcsr[3], BCSR3_FETHIEN2);
setbits32(&bcsr[3], BCSR3_FETH2_RST);
clrbits32(&bcsr[3], BCSR3_USB_nEN);
iounmap(bcsr);
init_ioports();
pq2_init_pci();
if (ppc_md.progress)
ppc_md.progress("mpc8272_ads_setup_arch(), finish", 0);
}
static const struct of_device_id of_bus_ids[] __initconst = {
{ .name = "soc", },
{ .name = "cpm", },
{ .name = "localbus", },
{},
};
static int __init declare_of_platform_devices(void)
{
/* Publish the QE devices */
of_platform_bus_probe(NULL, of_bus_ids, NULL);
return 0;
}
machine_device_initcall(mpc8272_ads, declare_of_platform_devices);
/*
* Called very early, device-tree isn't unflattened
*/
static int __init mpc8272_ads_probe(void)
{
unsigned long root = of_get_flat_dt_root();
return of_flat_dt_is_compatible(root, "fsl,mpc8272ads");
}
define_machine(mpc8272_ads)
{
.name = "Freescale MPC8272 ADS",
.probe = mpc8272_ads_probe,
.setup_arch = mpc8272_ads_setup_arch,
.init_IRQ = mpc8272_ads_pic_init,
.get_irq = cpm2_get_irq,
.calibrate_decr = generic_calibrate_decr,
.restart = pq2_restart,
.progress = udbg_progress,
};