[PATCH v10 5/5] MIPS: Loongson64: Switch to generic PCI driver

Jiaxun Yang
2020-05-14T13:18:26Z

We can now enable generic PCI driver in Kconfig, and remove legacy
PCI driver code.

Radeon vbios quirk is moved to the platform folder to fit the
new structure.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
--
v9: Fix licenses tag
---
arch/mips/Kconfig | 1 +
arch/mips/loongson64/Makefile | 2 +-
arch/mips/loongson64/vbios_quirk.c | 29 ++++++++
arch/mips/pci/Makefile | 1 -
arch/mips/pci/fixup-loongson3.c | 71 ------------------
arch/mips/pci/ops-loongson3.c | 116 -----------------------------
6 files changed, 31 insertions(+), 189 deletions(-)
create mode 100644 arch/mips/loongson64/vbios_quirk.c
delete mode 100644 arch/mips/pci/fixup-loongson3.c
delete mode 100644 arch/mips/pci/ops-loongson3.c

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 0519ca9f00f9..7a4fcc4ade1f 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -480,6 +480,7 @@ config MACH_LOONGSON64
select IRQ_MIPS_CPU
select NR_CPUS_DEFAULT_64
select USE_GENERIC_EARLY_PRINTK_8250
+ select PCI_DRIVERS_GENERIC
select SYS_HAS_CPU_LOONGSON64
select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_SMP
diff --git a/arch/mips/loongson64/Makefile b/arch/mips/loongson64/Makefile
index 6f3c2b47f66f..6f81b822aeae 100644
--- a/arch/mips/loongson64/Makefile
+++ b/arch/mips/loongson64/Makefile
@@ -8,5 +8,5 @@ obj-$(CONFIG_MACH_LOONGSON64) += cop2-ex.o platform.o dma.o \
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_NUMA) += numa.o
obj-$(CONFIG_RS780_HPET) += hpet.o
-obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_SUSPEND) += pm.o
+obj-$(CONFIG_PCI_QUIRKS) += vbios_quirk.o
diff --git a/arch/mips/loongson64/vbios_quirk.c b/arch/mips/loongson64/vbios_quirk.c
new file mode 100644
index 000000000000..9a29e94d3db1
--- /dev/null
+++ b/arch/mips/loongson64/vbios_quirk.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/pci.h>
+#include <loongson.h>
+
+static void pci_fixup_radeon(struct pci_dev *pdev)
+{
+ struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
+
+ if (res->start)
+ return;
+
+ if (!loongson_sysconf.vgabios_addr)
+ return;
+
+ pci_disable_rom(pdev);
+ if (res->parent)
+ release_resource(res);
+
+ res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr);
+ res->end = res->start + 256*1024 - 1;
+ res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
+ IORESOURCE_PCI_FIXED;
+
+ dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n",
+ PCI_ROM_RESOURCE, res);
+}
+DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, 0x9615,
+ PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon);
diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile
index 342ce10ef593..438f10955d89 100644
--- a/arch/mips/pci/Makefile
+++ b/arch/mips/pci/Makefile
@@ -35,7 +35,6 @@ obj-$(CONFIG_LASAT) += pci-lasat.o
obj-$(CONFIG_MIPS_COBALT) += fixup-cobalt.o
obj-$(CONFIG_LEMOTE_FULOONG2E) += fixup-fuloong2e.o ops-loongson2.o
obj-$(CONFIG_LEMOTE_MACH2F) += fixup-lemote2f.o ops-loongson2.o
-obj-$(CONFIG_MACH_LOONGSON64) += fixup-loongson3.o ops-loongson3.o
obj-$(CONFIG_MIPS_MALTA) += fixup-malta.o pci-malta.o
obj-$(CONFIG_PMC_MSP7120_GW) += fixup-pmcmsp.o ops-pmcmsp.o
obj-$(CONFIG_PMC_MSP7120_EVAL) += fixup-pmcmsp.o ops-pmcmsp.o
diff --git a/arch/mips/pci/fixup-loongson3.c b/arch/mips/pci/fixup-loongson3.c
deleted file mode 100644
index 8a741c2c6685..000000000000
--- a/arch/mips/pci/fixup-loongson3.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * fixup-loongson3.c
- *
- * Copyright (C) 2012 Lemote, Inc.
- * Author: Xiang Yu, xiangy@lemote.com
- * Chen Huacai, chenhc@lemote.com
- *
- * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <linux/pci.h>
-#include <boot_param.h>
-
-static void print_fixup_info(const struct pci_dev *pdev)
-{
- dev_info(&pdev->dev, "Device %x:%x, irq %d\n",
- pdev->vendor, pdev->device, pdev->irq);
-}
-
-int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- print_fixup_info(dev);
- return dev->irq;
-}
-
-static void pci_fixup_radeon(struct pci_dev *pdev)
-{
- struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
-
- if (res->start)
- return;
-
- if (!loongson_sysconf.vgabios_addr)
- return;
-
- pci_disable_rom(pdev);
- if (res->parent)
- release_resource(res);
-
- res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr);
- res->end = res->start + 256*1024 - 1;
- res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
- IORESOURCE_PCI_FIXED;
-
- dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n",
- PCI_ROM_RESOURCE, res);
-}
-
-DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
- PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon);
-
-/* Do platform specific device initialization at pci_enable_device() time */
-int pcibios_plat_dev_init(struct pci_dev *dev)
-{
- return 0;
-}
diff --git a/arch/mips/pci/ops-loongson3.c b/arch/mips/pci/ops-loongson3.c
deleted file mode 100644
index 2f6ad36bdea6..000000000000
--- a/arch/mips/pci/ops-loongson3.c
+++ /dev/null
@@ -1,116 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-
-#include <asm/mips-boards/bonito64.h>
-
-#include <loongson.h>
-
-#define PCI_ACCESS_READ 0
-#define PCI_ACCESS_WRITE 1
-
-#define HT1LO_PCICFG_BASE 0x1a000000
-#define HT1LO_PCICFG_BASE_TP1 0x1b000000
-
-static int loongson3_pci_config_access(unsigned char access_type,
- struct pci_bus *bus, unsigned int devfn,
- int where, u32 *data)
-{
- unsigned char busnum = bus->number;
- int function = PCI_FUNC(devfn);
- int device = PCI_SLOT(devfn);
- int reg = where & ~3;
- void *addrp;
- u64 addr;
-
- if (where < PCI_CFG_SPACE_SIZE) { /* standard config */
- addr = (busnum << 16) | (device << 11) | (function << 8) | reg;
- if (busnum == 0) {
- if (device > 31)
- return PCIBIOS_DEVICE_NOT_FOUND;
- addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE | addr);
- } else {
- addrp = (void *)TO_UNCAC(HT1LO_PCICFG_BASE_TP1 | addr);
- }
- } else if (where < PCI_CFG_SPACE_EXP_SIZE) { /* extended config */
- struct pci_dev *rootdev;
-
- rootdev = pci_get_domain_bus_and_slot(0, 0, 0);
- if (!rootdev)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- addr = pci_resource_start(rootdev, 3);
- if (!addr)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- addr |= busnum << 20 | device << 15 | function << 12 | reg;
- addrp = (void *)TO_UNCAC(addr);
- } else {
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- if (access_type == PCI_ACCESS_WRITE)
- writel(*data, addrp);
- else {
- *data = readl(addrp);
- if (*data == 0xffffffff) {
- *data = -1;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int loongson3_pci_pcibios_read(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 *val)
-{
- u32 data = 0;
- int ret = loongson3_pci_config_access(PCI_ACCESS_READ,
- bus, devfn, where, &data);
-
- if (ret != PCIBIOS_SUCCESSFUL)
- return ret;
-
- if (size == 1)
- *val = (data >> ((where & 3) << 3)) & 0xff;
- else if (size == 2)
- *val = (data >> ((where & 3) << 3)) & 0xffff;
- else
- *val = data;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int loongson3_pci_pcibios_write(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 val)
-{
- u32 data = 0;
- int ret;
-
- if (size == 4)
- data = val;
- else {
- ret = loongson3_pci_config_access(PCI_ACCESS_READ,
- bus, devfn, where, &data);
- if (ret != PCIBIOS_SUCCESSFUL)
- return ret;
-
- if (size == 1)
- data = (data & ~(0xff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
- else if (size == 2)
- data = (data & ~(0xffff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
- }
-
- ret = loongson3_pci_config_access(PCI_ACCESS_WRITE,
- bus, devfn, where, &data);
-
- return ret;
-}
-
-struct pci_ops loongson_pci_ops = {
- .read = loongson3_pci_pcibios_read,
- .write = loongson3_pci_pcibios_write
-};
--
2.26.2