134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
|
|
*
|
|
* BRIEF MODULE DESCRIPTION
|
|
*
|
|
* Author: source@mvista.com
|
|
*
|
|
* This program is free software; you can distribute it and/or modify it
|
|
* under the terms of the GNU General Public License (Version 2) as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <pci.h>
|
|
#include <glb.h>
|
|
#include <nand.h>
|
|
|
|
static struct resource pci_io_resource = {
|
|
.start = PNX8550_PCIIO + 0x1000, /* reserve regacy I/O space */
|
|
.end = PNX8550_PCIIO + PNX8550_PCIIO_SIZE,
|
|
.name = "pci IO space",
|
|
.flags = IORESOURCE_IO
|
|
};
|
|
|
|
static struct resource pci_mem_resource = {
|
|
.start = PNX8550_PCIMEM,
|
|
.end = PNX8550_PCIMEM + PNX8550_PCIMEM_SIZE - 1,
|
|
.name = "pci memory space",
|
|
.flags = IORESOURCE_MEM
|
|
};
|
|
|
|
extern struct pci_ops pnx8550_pci_ops;
|
|
|
|
static struct pci_controller pnx8550_controller = {
|
|
.pci_ops = &pnx8550_pci_ops,
|
|
.io_resource = &pci_io_resource,
|
|
.mem_resource = &pci_mem_resource,
|
|
};
|
|
|
|
/* Return the total size of DRAM-memory, (RANK0 + RANK1) */
|
|
static inline unsigned long get_system_mem_size(void)
|
|
{
|
|
/* Read IP2031_RANK0_ADDR_LO */
|
|
unsigned long dram_r0_lo = inl(PCI_BASE | 0x65010);
|
|
/* Read IP2031_RANK1_ADDR_HI */
|
|
unsigned long dram_r1_hi = inl(PCI_BASE | 0x65018);
|
|
|
|
return dram_r1_hi - dram_r0_lo + 1;
|
|
}
|
|
|
|
static int __init pnx8550_pci_setup(void)
|
|
{
|
|
int pci_mem_code;
|
|
int mem_size = get_system_mem_size() >> 20;
|
|
|
|
/* Clear the Global 2 Register, PCI Inta Output Enable Registers
|
|
Bit 1:Enable DAC Powerdown
|
|
-> 0:DACs are enabled and are working normally
|
|
1:DACs are powerdown
|
|
Bit 0:Enable of PCI inta output
|
|
-> 0 = Disable PCI inta output
|
|
1 = Enable PCI inta output
|
|
*/
|
|
PNX8550_GLB2_ENAB_INTA_O = 0;
|
|
|
|
/* Calc the PCI mem size code */
|
|
if (mem_size >= 128)
|
|
pci_mem_code = SIZE_128M;
|
|
else if (mem_size >= 64)
|
|
pci_mem_code = SIZE_64M;
|
|
else if (mem_size >= 32)
|
|
pci_mem_code = SIZE_32M;
|
|
else
|
|
pci_mem_code = SIZE_16M;
|
|
|
|
/* Set PCI_XIO registers */
|
|
outl(pci_mem_resource.start, PCI_BASE | PCI_BASE1_LO);
|
|
outl(pci_mem_resource.end + 1, PCI_BASE | PCI_BASE1_HI);
|
|
outl(pci_io_resource.start, PCI_BASE | PCI_BASE2_LO);
|
|
outl(pci_io_resource.end, PCI_BASE | PCI_BASE2_HI);
|
|
|
|
/* Send memory transaction via PCI_BASE2 */
|
|
outl(0x00000001, PCI_BASE | PCI_IO);
|
|
|
|
/* Unlock the setup register */
|
|
outl(0xca, PCI_BASE | PCI_UNLOCKREG);
|
|
|
|
/*
|
|
* BAR0 of PNX8550 (pci base 10) must be zero in order for ide
|
|
* to work, and in order for bus_to_baddr to work without any
|
|
* hacks.
|
|
*/
|
|
outl(0x00000000, PCI_BASE | PCI_BASE10);
|
|
|
|
/*
|
|
*These two bars are set by default or the boot code.
|
|
* However, it's safer to set them here so we're not boot
|
|
* code dependent.
|
|
*/
|
|
outl(0x1be00000, PCI_BASE | PCI_BASE14); /* PNX MMIO */
|
|
outl(PNX8550_NAND_BASE_ADDR, PCI_BASE | PCI_BASE18); /* XIO */
|
|
|
|
outl(PCI_EN_TA |
|
|
PCI_EN_PCI2MMI |
|
|
PCI_EN_XIO |
|
|
PCI_SETUP_BASE18_SIZE(SIZE_32M) |
|
|
PCI_SETUP_BASE18_EN |
|
|
PCI_SETUP_BASE14_EN |
|
|
PCI_SETUP_BASE10_PREF |
|
|
PCI_SETUP_BASE10_SIZE(pci_mem_code) |
|
|
PCI_SETUP_CFGMANAGE_EN |
|
|
PCI_SETUP_PCIARB_EN,
|
|
PCI_BASE |
|
|
PCI_SETUP); /* PCI_SETUP */
|
|
outl(0x00000000, PCI_BASE | PCI_CTRL); /* PCI_CONTROL */
|
|
|
|
register_pci_controller(&pnx8550_controller);
|
|
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(pnx8550_pci_setup);
|