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Diffstat (limited to 'arch/mips/pci/pci-vr41xx.c')
-rw-r--r--arch/mips/pci/pci-vr41xx.c320
1 files changed, 320 insertions, 0 deletions
diff --git a/arch/mips/pci/pci-vr41xx.c b/arch/mips/pci/pci-vr41xx.c
new file mode 100644
index 000000000..157c7715b
--- /dev/null
+++ b/arch/mips/pci/pci-vr41xx.c
@@ -0,0 +1,320 @@
+/*
+ * pci-vr41xx.c, PCI Control Unit routines for the NEC VR4100 series.
+ *
+ * Copyright (C) 2001-2003 MontaVista Software Inc.
+ * Author: Yoichi Yuasa <source@mvista.com>
+ * Copyright (C) 2004-2008 Yoichi Yuasa <yuasa@linux-mips.org>
+ * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
+ *
+ * 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
+ */
+/*
+ * Changes:
+ * MontaVista Software Inc. <source@mvista.com>
+ * - New creation, NEC VR4122 and VR4131 are supported.
+ */
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+
+#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/vr41xx/pci.h>
+#include <asm/vr41xx/vr41xx.h>
+
+#include "pci-vr41xx.h"
+
+extern struct pci_ops vr41xx_pci_ops;
+
+static void __iomem *pciu_base;
+
+#define pciu_read(offset) readl(pciu_base + (offset))
+#define pciu_write(offset, value) writel((value), pciu_base + (offset))
+
+static struct pci_master_address_conversion pci_master_memory1 = {
+ .bus_base_address = PCI_MASTER_MEM1_BUS_BASE_ADDRESS,
+ .address_mask = PCI_MASTER_MEM1_ADDRESS_MASK,
+ .pci_base_address = PCI_MASTER_MEM1_PCI_BASE_ADDRESS,
+};
+
+static struct pci_target_address_conversion pci_target_memory1 = {
+ .address_mask = PCI_TARGET_MEM1_ADDRESS_MASK,
+ .bus_base_address = PCI_TARGET_MEM1_BUS_BASE_ADDRESS,
+};
+
+static struct pci_master_address_conversion pci_master_io = {
+ .bus_base_address = PCI_MASTER_IO_BUS_BASE_ADDRESS,
+ .address_mask = PCI_MASTER_IO_ADDRESS_MASK,
+ .pci_base_address = PCI_MASTER_IO_PCI_BASE_ADDRESS,
+};
+
+static struct pci_mailbox_address pci_mailbox = {
+ .base_address = PCI_MAILBOX_BASE_ADDRESS,
+};
+
+static struct pci_target_address_window pci_target_window1 = {
+ .base_address = PCI_TARGET_WINDOW1_BASE_ADDRESS,
+};
+
+static struct resource pci_mem_resource = {
+ .name = "PCI Memory resources",
+ .start = PCI_MEM_RESOURCE_START,
+ .end = PCI_MEM_RESOURCE_END,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct resource pci_io_resource = {
+ .name = "PCI I/O resources",
+ .start = PCI_IO_RESOURCE_START,
+ .end = PCI_IO_RESOURCE_END,
+ .flags = IORESOURCE_IO,
+};
+
+static struct pci_controller_unit_setup vr41xx_pci_controller_unit_setup = {
+ .master_memory1 = &pci_master_memory1,
+ .target_memory1 = &pci_target_memory1,
+ .master_io = &pci_master_io,
+ .exclusive_access = CANNOT_LOCK_FROM_DEVICE,
+ .wait_time_limit_from_irdy_to_trdy = 0,
+ .mailbox = &pci_mailbox,
+ .target_window1 = &pci_target_window1,
+ .master_latency_timer = 0x80,
+ .retry_limit = 0,
+ .arbiter_priority_control = PCI_ARBITRATION_MODE_FAIR,
+ .take_away_gnt_mode = PCI_TAKE_AWAY_GNT_DISABLE,
+};
+
+static struct pci_controller vr41xx_pci_controller = {
+ .pci_ops = &vr41xx_pci_ops,
+ .mem_resource = &pci_mem_resource,
+ .io_resource = &pci_io_resource,
+};
+
+void __init vr41xx_pciu_setup(struct pci_controller_unit_setup *setup)
+{
+ vr41xx_pci_controller_unit_setup = *setup;
+}
+
+static int __init vr41xx_pciu_init(void)
+{
+ struct pci_controller_unit_setup *setup;
+ struct pci_master_address_conversion *master;
+ struct pci_target_address_conversion *target;
+ struct pci_mailbox_address *mailbox;
+ struct pci_target_address_window *window;
+ unsigned long vtclock, pci_clock_max;
+ uint32_t val;
+
+ setup = &vr41xx_pci_controller_unit_setup;
+
+ if (request_mem_region(PCIU_BASE, PCIU_SIZE, "PCIU") == NULL)
+ return -EBUSY;
+
+ pciu_base = ioremap(PCIU_BASE, PCIU_SIZE);
+ if (pciu_base == NULL) {
+ release_mem_region(PCIU_BASE, PCIU_SIZE);
+ return -EBUSY;
+ }
+
+ /* Disable PCI interrupt */
+ vr41xx_disable_pciint();
+
+ /* Supply VTClock to PCIU */
+ vr41xx_supply_clock(PCIU_CLOCK);
+
+ /* Dummy write, waiting for supply of VTClock. */
+ vr41xx_disable_pciint();
+
+ /* Select PCI clock */
+ if (setup->pci_clock_max != 0)
+ pci_clock_max = setup->pci_clock_max;
+ else
+ pci_clock_max = PCI_CLOCK_MAX;
+ vtclock = vr41xx_get_vtclock_frequency();
+ if (vtclock < pci_clock_max)
+ pciu_write(PCICLKSELREG, EQUAL_VTCLOCK);
+ else if ((vtclock / 2) < pci_clock_max)
+ pciu_write(PCICLKSELREG, HALF_VTCLOCK);
+ else if (current_cpu_data.processor_id >= PRID_VR4131_REV2_1 &&
+ (vtclock / 3) < pci_clock_max)
+ pciu_write(PCICLKSELREG, ONE_THIRD_VTCLOCK);
+ else if ((vtclock / 4) < pci_clock_max)
+ pciu_write(PCICLKSELREG, QUARTER_VTCLOCK);
+ else {
+ printk(KERN_ERR "PCI Clock is over 33MHz.\n");
+ iounmap(pciu_base);
+ return -EINVAL;
+ }
+
+ /* Supply PCI clock by PCI bus */
+ vr41xx_supply_clock(PCI_CLOCK);
+
+ if (setup->master_memory1 != NULL) {
+ master = setup->master_memory1;
+ val = IBA(master->bus_base_address) |
+ MASTER_MSK(master->address_mask) |
+ WINEN |
+ PCIA(master->pci_base_address);
+ pciu_write(PCIMMAW1REG, val);
+ } else {
+ val = pciu_read(PCIMMAW1REG);
+ val &= ~WINEN;
+ pciu_write(PCIMMAW1REG, val);
+ }
+
+ if (setup->master_memory2 != NULL) {
+ master = setup->master_memory2;
+ val = IBA(master->bus_base_address) |
+ MASTER_MSK(master->address_mask) |
+ WINEN |
+ PCIA(master->pci_base_address);
+ pciu_write(PCIMMAW2REG, val);
+ } else {
+ val = pciu_read(PCIMMAW2REG);
+ val &= ~WINEN;
+ pciu_write(PCIMMAW2REG, val);
+ }
+
+ if (setup->target_memory1 != NULL) {
+ target = setup->target_memory1;
+ val = TARGET_MSK(target->address_mask) |
+ WINEN |
+ ITA(target->bus_base_address);
+ pciu_write(PCITAW1REG, val);
+ } else {
+ val = pciu_read(PCITAW1REG);
+ val &= ~WINEN;
+ pciu_write(PCITAW1REG, val);
+ }
+
+ if (setup->target_memory2 != NULL) {
+ target = setup->target_memory2;
+ val = TARGET_MSK(target->address_mask) |
+ WINEN |
+ ITA(target->bus_base_address);
+ pciu_write(PCITAW2REG, val);
+ } else {
+ val = pciu_read(PCITAW2REG);
+ val &= ~WINEN;
+ pciu_write(PCITAW2REG, val);
+ }
+
+ if (setup->master_io != NULL) {
+ master = setup->master_io;
+ val = IBA(master->bus_base_address) |
+ MASTER_MSK(master->address_mask) |
+ WINEN |
+ PCIIA(master->pci_base_address);
+ pciu_write(PCIMIOAWREG, val);
+ } else {
+ val = pciu_read(PCIMIOAWREG);
+ val &= ~WINEN;
+ pciu_write(PCIMIOAWREG, val);
+ }
+
+ if (setup->exclusive_access == CANNOT_LOCK_FROM_DEVICE)
+ pciu_write(PCIEXACCREG, UNLOCK);
+ else
+ pciu_write(PCIEXACCREG, 0);
+
+ if (current_cpu_type() == CPU_VR4122)
+ pciu_write(PCITRDYVREG, TRDYV(setup->wait_time_limit_from_irdy_to_trdy));
+
+ pciu_write(LATTIMEREG, MLTIM(setup->master_latency_timer));
+
+ if (setup->mailbox != NULL) {
+ mailbox = setup->mailbox;
+ val = MBADD(mailbox->base_address) | TYPE_32BITSPACE |
+ MSI_MEMORY | PREF_APPROVAL;
+ pciu_write(MAILBAREG, val);
+ }
+
+ if (setup->target_window1) {
+ window = setup->target_window1;
+ val = PMBA(window->base_address) | TYPE_32BITSPACE |
+ MSI_MEMORY | PREF_APPROVAL;
+ pciu_write(PCIMBA1REG, val);
+ }
+
+ if (setup->target_window2) {
+ window = setup->target_window2;
+ val = PMBA(window->base_address) | TYPE_32BITSPACE |
+ MSI_MEMORY | PREF_APPROVAL;
+ pciu_write(PCIMBA2REG, val);
+ }
+
+ val = pciu_read(RETVALREG);
+ val &= ~RTYVAL_MASK;
+ val |= RTYVAL(setup->retry_limit);
+ pciu_write(RETVALREG, val);
+
+ val = pciu_read(PCIAPCNTREG);
+ val &= ~(TKYGNT | PAPC);
+
+ switch (setup->arbiter_priority_control) {
+ case PCI_ARBITRATION_MODE_ALTERNATE_0:
+ val |= PAPC_ALTERNATE_0;
+ break;
+ case PCI_ARBITRATION_MODE_ALTERNATE_B:
+ val |= PAPC_ALTERNATE_B;
+ break;
+ default:
+ val |= PAPC_FAIR;
+ break;
+ }
+
+ if (setup->take_away_gnt_mode == PCI_TAKE_AWAY_GNT_ENABLE)
+ val |= TKYGNT_ENABLE;
+
+ pciu_write(PCIAPCNTREG, val);
+
+ pciu_write(COMMANDREG, PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+ PCI_COMMAND_MASTER | PCI_COMMAND_PARITY |
+ PCI_COMMAND_SERR);
+
+ /* Clear bus error */
+ pciu_read(BUSERRADREG);
+
+ pciu_write(PCIENREG, PCIU_CONFIG_DONE);
+
+ if (setup->mem_resource != NULL)
+ vr41xx_pci_controller.mem_resource = setup->mem_resource;
+
+ if (setup->io_resource != NULL) {
+ vr41xx_pci_controller.io_resource = setup->io_resource;
+ } else {
+ set_io_port_base(IO_PORT_BASE);
+ ioport_resource.start = IO_PORT_RESOURCE_START;
+ ioport_resource.end = IO_PORT_RESOURCE_END;
+ }
+
+ if (setup->master_io) {
+ void __iomem *io_map_base;
+ struct resource *res = vr41xx_pci_controller.io_resource;
+ master = setup->master_io;
+ io_map_base = ioremap(master->bus_base_address,
+ resource_size(res));
+ if (!io_map_base)
+ return -EBUSY;
+
+ vr41xx_pci_controller.io_map_base = (unsigned long)io_map_base;
+ }
+
+ register_pci_controller(&vr41xx_pci_controller);
+
+ return 0;
+}
+
+arch_initcall(vr41xx_pciu_init);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 23:31:38 +0000