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Diffstat (limited to 'arch/mips/pnx8550/common/pci.c')
-rw-r--r--arch/mips/pnx8550/common/pci.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/arch/mips/pnx8550/common/pci.c b/arch/mips/pnx8550/common/pci.c
new file mode 100644
index 00000000000..98e86ddb86c
--- /dev/null
+++ b/arch/mips/pnx8550/common/pci.c
@@ -0,0 +1,134 @@
+/*
+ *
+ * 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_map_base = PNX8550_PORT_BASE,
+ .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);