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/*
* Copyright (C) 2004 by Basler Vision Technologies AG
* Author: Thomas Koeller <thomas.koeller@baslerweb.com>
* Based on the PMC-Sierra Yosemite board support by Ralf Baechle.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/bitops.h>
#include <asm/rm9k-ocd.h>
#include <excite.h>
extern struct pci_ops titan_pci_ops;
static struct resource
mem_resource = {
.name = "PCI memory",
.start = EXCITE_PHYS_PCI_MEM,
.end = EXCITE_PHYS_PCI_MEM + EXCITE_SIZE_PCI_MEM - 1,
.flags = IORESOURCE_MEM
},
io_resource = {
.name = "PCI I/O",
.start = EXCITE_PHYS_PCI_IO,
.end = EXCITE_PHYS_PCI_IO + EXCITE_SIZE_PCI_IO - 1,
.flags = IORESOURCE_IO
};
static struct pci_controller bx_controller = {
.pci_ops = &titan_pci_ops,
.mem_resource = &mem_resource,
.mem_offset = 0x00000000UL,
.io_resource = &io_resource,
.io_offset = 0x00000000UL
};
static char
iopage_failed[] __initdata = "Cannot allocate PCI I/O page",
modebits_no_pci[] __initdata = "PCI is not configured in mode bits";
#define RM9000x2_OCD_HTSC 0x0604
#define RM9000x2_OCD_HTBHL 0x060c
#define RM9000x2_OCD_PCIHRST 0x078c
#define RM9K_OCD_MODEBIT1 0x00d4 /* (MODEBIT1) Mode Bit 1 */
#define RM9K_OCD_CPHDCR 0x00f4 /* CPU-PCI/HT Data Control. */
#define PCISC_FB2B 0x00000200
#define PCISC_MWICG 0x00000010
#define PCISC_EMC 0x00000004
#define PCISC_ERMA 0x00000002
static int __init basler_excite_pci_setup(void)
{
const unsigned int fullbars = memsize / (256 << 20);
unsigned int i;
/* Check modebits to see if PCI is really enabled. */
if (!((ocd_readl(RM9K_OCD_MODEBIT1) >> (47-32)) & 0x1))
panic(modebits_no_pci);
if (NULL == request_mem_region(EXCITE_PHYS_PCI_IO, EXCITE_SIZE_PCI_IO,
"Memory-mapped PCI I/O page"))
panic(iopage_failed);
/* Enable PCI 0 as master for config cycles */
ocd_writel(PCISC_EMC | PCISC_ERMA, RM9000x2_OCD_HTSC);
/* Set up latency timer */
ocd_writel(0x8008, RM9000x2_OCD_HTBHL);
/* Setup host IO and Memory space */
ocd_writel((EXCITE_PHYS_PCI_IO >> 4) | 1, LKB7);
ocd_writel(((EXCITE_SIZE_PCI_IO >> 4) & 0x7fffff00) - 0x100, LKM7);
ocd_writel((EXCITE_PHYS_PCI_MEM >> 4) | 1, LKB8);
ocd_writel(((EXCITE_SIZE_PCI_MEM >> 4) & 0x7fffff00) - 0x100, LKM8);
/* Set up PCI BARs to map all installed memory */
for (i = 0; i < 6; i++) {
const unsigned int bar = 0x610 + i * 4;
if (i < fullbars) {
ocd_writel(0x10000000 * i, bar);
ocd_writel(0x01000000 * i, bar + 0x140);
ocd_writel(0x0ffff029, bar + 0x100);
continue;
}
if (i == fullbars) {
int o;
u32 mask;
const unsigned long rem = memsize - i * 0x10000000;
if (!rem) {
ocd_writel(0x00000000, bar + 0x100);
continue;
}
o = ffs(rem) - 1;
if (rem & ~(0x1 << o))
o++;
mask = ((0x1 << o) & 0x0ffff000) - 0x1000;
ocd_writel(0x10000000 * i, bar);
ocd_writel(0x01000000 * i, bar + 0x140);
ocd_writel(0x00000029 | mask, bar + 0x100);
continue;
}
ocd_writel(0x00000000, bar + 0x100);
}
/* Finally, enable the PCI interupt */
#if USB_IRQ > 7
set_c0_intcontrol(1 << USB_IRQ);
#else
set_c0_status(1 << (USB_IRQ + 8));
#endif
ioport_resource.start = EXCITE_PHYS_PCI_IO;
ioport_resource.end = EXCITE_PHYS_PCI_IO + EXCITE_SIZE_PCI_IO - 1;
set_io_port_base((unsigned long) ioremap_nocache(EXCITE_PHYS_PCI_IO, EXCITE_SIZE_PCI_IO));
register_pci_controller(&bx_controller);
return 0;
}
arch_initcall(basler_excite_pci_setup);
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