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/*
* Architecture- / platform-specific boot-time initialization code for
* IBM PowerPC 4xx based boards. Adapted from original
* code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
* <dan@net4x.com>.
*
* Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
*
* Rewritten and ported to the merged powerpc tree:
* Copyright 2007 IBM Corporation
* Josh Boyer <jwboyer@linux.vnet.ibm.com>
*
* Adapted to EP405 by Ben. Herrenschmidt <benh@kernel.crashing.org>
*
* TODO: Wire up the PCI IRQ mux and the southbridge interrupts
*
* 2002 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/init.h>
#include <linux/of_platform.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/time.h>
#include <asm/uic.h>
#include <asm/pci-bridge.h>
#include <asm/ppc4xx.h>
static struct device_node *bcsr_node;
static void __iomem *bcsr_regs;
/* BCSR registers */
#define BCSR_ID 0
#define BCSR_PCI_CTRL 1
#define BCSR_FLASH_NV_POR_CTRL 2
#define BCSR_FENET_UART_CTRL 3
#define BCSR_PCI_IRQ 4
#define BCSR_XIRQ_SELECT 5
#define BCSR_XIRQ_ROUTING 6
#define BCSR_XIRQ_STATUS 7
#define BCSR_XIRQ_STATUS2 8
#define BCSR_SW_STAT_LED_CTRL 9
#define BCSR_GPIO_IRQ_PAR_CTRL 10
/* there's more, can't be bothered typing them tho */
static __initdata struct of_device_id ep405_of_bus[] = {
{ .compatible = "ibm,plb3", },
{ .compatible = "ibm,opb", },
{ .compatible = "ibm,ebc", },
{},
};
static int __init ep405_device_probe(void)
{
of_platform_bus_probe(NULL, ep405_of_bus, NULL);
return 0;
}
machine_device_initcall(ep405, ep405_device_probe);
static void __init ep405_init_bcsr(void)
{
const u8 *irq_routing;
int i;
/* Find the bloody thing & map it */
bcsr_node = of_find_compatible_node(NULL, NULL, "ep405-bcsr");
if (bcsr_node == NULL) {
printk(KERN_ERR "EP405 BCSR not found !\n");
return;
}
bcsr_regs = of_iomap(bcsr_node, 0);
if (bcsr_regs == NULL) {
printk(KERN_ERR "EP405 BCSR failed to map !\n");
return;
}
/* Get the irq-routing property and apply the routing to the CPLD */
irq_routing = of_get_property(bcsr_node, "irq-routing", NULL);
if (irq_routing == NULL)
return;
for (i = 0; i < 16; i++) {
u8 irq = irq_routing[i];
out_8(bcsr_regs + BCSR_XIRQ_SELECT, i);
out_8(bcsr_regs + BCSR_XIRQ_ROUTING, irq);
}
in_8(bcsr_regs + BCSR_XIRQ_SELECT);
mb();
out_8(bcsr_regs + BCSR_GPIO_IRQ_PAR_CTRL, 0xfe);
}
static void __init ep405_setup_arch(void)
{
/* Find & init the BCSR CPLD */
ep405_init_bcsr();
ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
}
static int __init ep405_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (!of_flat_dt_is_compatible(root, "ep405"))
return 0;
return 1;
}
define_machine(ep405) {
.name = "EP405",
.probe = ep405_probe,
.setup_arch = ep405_setup_arch,
.progress = udbg_progress,
.init_IRQ = uic_init_tree,
.get_irq = uic_get_irq,
.restart = ppc4xx_reset_system,
.calibrate_decr = generic_calibrate_decr,
};
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