133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
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*
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* BRIEF MODULE DESCRIPTION
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*
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* Author: source@mvista.com
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <pci.h>
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#include <glb.h>
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#include <nand.h>
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static struct resource pci_io_resource = {
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.start = PNX8550_PCIIO + 0x1000, /* reserve regacy I/O space */
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.end = PNX8550_PCIIO + PNX8550_PCIIO_SIZE,
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.name = "pci IO space",
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.flags = IORESOURCE_IO
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};
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static struct resource pci_mem_resource = {
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.start = PNX8550_PCIMEM,
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.end = PNX8550_PCIMEM + PNX8550_PCIMEM_SIZE - 1,
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.name = "pci memory space",
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.flags = IORESOURCE_MEM
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};
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extern struct pci_ops pnx8550_pci_ops;
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static struct pci_controller pnx8550_controller = {
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.pci_ops = &pnx8550_pci_ops,
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.io_resource = &pci_io_resource,
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.mem_resource = &pci_mem_resource,
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};
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/* Return the total size of DRAM-memory, (RANK0 + RANK1) */
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static inline unsigned long get_system_mem_size(void)
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{
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/* Read IP2031_RANK0_ADDR_LO */
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unsigned long dram_r0_lo = inl(PCI_BASE | 0x65010);
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/* Read IP2031_RANK1_ADDR_HI */
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unsigned long dram_r1_hi = inl(PCI_BASE | 0x65018);
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return dram_r1_hi - dram_r0_lo + 1;
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}
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static int __init pnx8550_pci_setup(void)
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{
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int pci_mem_code;
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int mem_size = get_system_mem_size() >> 20;
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/* Clear the Global 2 Register, PCI Inta Output Enable Registers
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Bit 1:Enable DAC Powerdown
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-> 0:DACs are enabled and are working normally
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1:DACs are powerdown
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Bit 0:Enable of PCI inta output
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-> 0 = Disable PCI inta output
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1 = Enable PCI inta output
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*/
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PNX8550_GLB2_ENAB_INTA_O = 0;
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/* Calc the PCI mem size code */
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if (mem_size >= 128)
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pci_mem_code = SIZE_128M;
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else if (mem_size >= 64)
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pci_mem_code = SIZE_64M;
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else if (mem_size >= 32)
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pci_mem_code = SIZE_32M;
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else
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pci_mem_code = SIZE_16M;
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/* Set PCI_XIO registers */
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outl(pci_mem_resource.start, PCI_BASE | PCI_BASE1_LO);
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outl(pci_mem_resource.end + 1, PCI_BASE | PCI_BASE1_HI);
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outl(pci_io_resource.start, PCI_BASE | PCI_BASE2_LO);
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outl(pci_io_resource.end, PCI_BASE | PCI_BASE2_HI);
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/* Send memory transaction via PCI_BASE2 */
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outl(0x00000001, PCI_BASE | PCI_IO);
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/* Unlock the setup register */
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outl(0xca, PCI_BASE | PCI_UNLOCKREG);
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/*
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* BAR0 of PNX8550 (pci base 10) must be zero in order for ide
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* to work, and in order for bus_to_baddr to work without any
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* hacks.
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*/
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outl(0x00000000, PCI_BASE | PCI_BASE10);
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/*
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*These two bars are set by default or the boot code.
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* However, it's safer to set them here so we're not boot
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* code dependent.
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*/
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outl(0x1be00000, PCI_BASE | PCI_BASE14); /* PNX MMIO */
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outl(PNX8550_NAND_BASE_ADDR, PCI_BASE | PCI_BASE18); /* XIO */
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outl(PCI_EN_TA |
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PCI_EN_PCI2MMI |
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PCI_EN_XIO |
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PCI_SETUP_BASE18_SIZE(SIZE_32M) |
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PCI_SETUP_BASE18_EN |
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PCI_SETUP_BASE14_EN |
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PCI_SETUP_BASE10_PREF |
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PCI_SETUP_BASE10_SIZE(pci_mem_code) |
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PCI_SETUP_CFGMANAGE_EN |
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PCI_SETUP_PCIARB_EN,
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PCI_BASE |
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PCI_SETUP); /* PCI_SETUP */
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outl(0x00000000, PCI_BASE | PCI_CTRL); /* PCI_CONTROL */
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register_pci_controller(&pnx8550_controller);
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return 0;
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}
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arch_initcall(pnx8550_pci_setup);
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