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kernel-ark/arch/mips/pci/pci-vr41xx.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

308 lines
8.2 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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)
*/
/*
* 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);
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