[MIPS] Support for the R5500-based NEC EMMA2RH Mark-eins board
Signed-off-by: dmitry pervushin <dpervushin@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/pci/ops-emma2rh.c b/arch/mips/pci/ops-emma2rh.c
new file mode 100644
index 0000000..e21b11b
--- /dev/null
+++ b/arch/mips/pci/ops-emma2rh.c
@@ -0,0 +1,186 @@
+/*
+ * arch/mips/pci/ops-emma2rh.c
+ * This file defines the PCI operation for EMMA2RH.
+ *
+ * Copyright (C) NEC Electronics Corporation 2004-2006
+ *
+ * This file is based on the arch/mips/pci/ops-vr41xx.c
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ *
+ * 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/config.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <asm/addrspace.h>
+#include <asm/debug.h>
+
+#include <asm/emma2rh/emma2rh.h>
+
+#define RTABORT (0x1<<9)
+#define RMABORT (0x1<<10)
+#define EMMA2RH_PCI_SLOT_NUM 9 /* 0000:09.0 is final PCI device */
+
+/*
+ * access config space
+ */
+
+static int check_args(struct pci_bus *bus, u32 devfn, u32 * bus_num)
+{
+ /* check if the bus is top-level */
+ if (bus->parent != NULL) {
+ *bus_num = bus->number;
+ db_assert(bus_num != 0);
+ } else
+ *bus_num = 0;
+
+ if (*bus_num == 0) {
+ /* Type 0 */
+ if (PCI_SLOT(devfn) >= 10)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ } else {
+ /* Type 1 */
+ if ((*bus_num >= 64) || (PCI_SLOT(devfn) >= 16))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+ return 0;
+}
+
+static inline int set_pci_configuration_address(unsigned char bus_num,
+ unsigned int devfn, int where)
+{
+ u32 config_win0;
+
+ emma2rh_out32(EMMA2RH_PCI_INT, ~RMABORT);
+ if (bus_num == 0)
+ /*
+ * Type 0 configuration
+ */
+ config_win0 = (1 << (22 + PCI_SLOT(devfn))) | (5 << 9);
+ else
+ /*
+ * Type 1 configuration
+ */
+ config_win0 = (bus_num << 26) | (PCI_SLOT(devfn) << 22) |
+ (1 << 15) | (5 << 9);
+
+ emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, config_win0);
+
+ return 0;
+}
+
+static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, uint32_t * val)
+{
+ u32 bus_num;
+ u32 base = KSEG1ADDR(EMMA2RH_PCI_CONFIG_BASE);
+ u32 backup_win0;
+ u32 data;
+
+ *val = 0xffffffffU;
+
+ if (check_args(bus, devfn, &bus_num) == PCIBIOS_DEVICE_NOT_FOUND)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ backup_win0 = emma2rh_in32(EMMA2RH_PCI_IWIN0_CTR);
+
+ if (set_pci_configuration_address(bus_num, devfn, where) < 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ data =
+ *(volatile u32 *)(base + (PCI_FUNC(devfn) << 8) +
+ (where & 0xfffffffc));
+
+ switch (size) {
+ case 1:
+ *val = (data >> ((where & 3) << 3)) & 0xffU;
+ break;
+ case 2:
+ *val = (data >> ((where & 2) << 3)) & 0xffffU;
+ break;
+ case 4:
+ *val = data;
+ break;
+ default:
+ emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, backup_win0);
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ }
+
+ emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, backup_win0);
+
+ if (emma2rh_in32(EMMA2RH_PCI_INT) & RMABORT)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, u32 val)
+{
+ u32 bus_num;
+ u32 base = KSEG1ADDR(EMMA2RH_PCI_CONFIG_BASE);
+ u32 backup_win0;
+ u32 data;
+ int shift;
+
+ if (check_args(bus, devfn, &bus_num) == PCIBIOS_DEVICE_NOT_FOUND)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ backup_win0 = emma2rh_in32(EMMA2RH_PCI_IWIN0_CTR);
+
+ if (set_pci_configuration_address(bus_num, devfn, where) < 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /* read modify write */
+ data =
+ *(volatile u32 *)(base + (PCI_FUNC(devfn) << 8) +
+ (where & 0xfffffffc));
+
+ switch (size) {
+ case 1:
+ shift = (where & 3) << 3;
+ data &= ~(0xffU << shift);
+ data |= ((val & 0xffU) << shift);
+ break;
+ case 2:
+ shift = (where & 2) << 3;
+ data &= ~(0xffffU << shift);
+ data |= ((val & 0xffffU) << shift);
+ break;
+ case 4:
+ data = val;
+ break;
+ default:
+ emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, backup_win0);
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ }
+ *(volatile u32 *)(base + (PCI_FUNC(devfn) << 8) +
+ (where & 0xfffffffc)) = data;
+
+ emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, backup_win0);
+ if (emma2rh_in32(EMMA2RH_PCI_INT) & RMABORT)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+struct pci_ops emma2rh_pci_ops = {
+ .read = pci_config_read,
+ .write = pci_config_write,
+};