linux-kernel - [PATCH v7 10/37] sh: Common PCI Framework driver support.

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Date: Thu,  4 Apr 2024 13:59:37 +0900
From: Yoshinori Sato <ysato@...rs.sourceforge.jp>
To: linux-sh@...r.kernel.org
Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	Damien Le Moal <dlemoal@...nel.org>,
	Niklas Cassel <cassel@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
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	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
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Subject: [PATCH v7 10/37] sh: Common PCI Framework driver support.

Add New OF based PCI Host driver.
This driver conflicts some point in legacy PCI driver.
To resolve the conflict, I made some changes to the legacy driver.

Signed-off-by: Yoshinori Sato <ysato@...rs.sourceforge.jp>
---
 arch/sh/include/asm/io.h  |  6 ++++++
 arch/sh/include/asm/pci.h |  4 ++++
 arch/sh/kernel/iomap.c    | 18 ++++++++++++++++++
 3 files changed, 28 insertions(+)

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 5c544cf5201b..29b5f996cde3 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -20,6 +20,7 @@
 #include <asm/page.h>
 #include <linux/pgtable.h>
 #include <asm-generic/iomap.h>
+#include <linux/ioport.h>
 
 #define __IO_PREFIX     generic
 #include <asm/io_generic.h>
@@ -310,4 +311,9 @@ unsigned long long poke_real_address_q(unsigned long long addr,
 int valid_phys_addr_range(phys_addr_t addr, size_t size);
 int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
 
+#if defined(CONFIG_PCI) && !defined(CONFIG_GENERIC_IOMAP)
+#define pci_remap_iospace pci_remap_iospace
+int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
+#endif
+
 #endif /* __ASM_SH_IO_H */
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h
index 54c30126ea17..92b3bd604319 100644
--- a/arch/sh/include/asm/pci.h
+++ b/arch/sh/include/asm/pci.h
@@ -2,6 +2,7 @@
 #ifndef __ASM_SH_PCI_H
 #define __ASM_SH_PCI_H
 
+#ifndef CONFIG_SH_DEVICE_TREE
 /* Can be used to override the logic in pci_scan_bus for skipping
    already-configured bus numbers - to be used for buggy BIOSes
    or architectures with incomplete PCI setup by the loader */
@@ -88,4 +89,7 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 	return hose->need_domain_info;
 }
 
+#else /* CONFIG_SH_DEVICE_TREE */
+#include <asm-generic/pci.h>
+#endif
 #endif /* __ASM_SH_PCI_H */
diff --git a/arch/sh/kernel/iomap.c b/arch/sh/kernel/iomap.c
index 0a0dff4e66de..d1b8e496ca23 100644
--- a/arch/sh/kernel/iomap.c
+++ b/arch/sh/kernel/iomap.c
@@ -160,3 +160,21 @@ void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 	mmio_outsl(addr, src, count);
 }
 EXPORT_SYMBOL(iowrite32_rep);
+
+#if defined(pci_remap_iospace)
+int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr)
+{
+	unsigned long vaddr = res->start;
+
+	if (!(res->flags & IORESOURCE_IO))
+		return -EINVAL;
+
+	if (res->end > IO_SPACE_LIMIT)
+		return -EINVAL;
+
+	__set_io_port_base(phys_addr);
+	return vmap_page_range(vaddr, vaddr + resource_size(res), phys_addr,
+			       pgprot_device(PAGE_KERNEL));
+}
+EXPORT_SYMBOL(pci_remap_iospace);
+#endif
-- 
2.39.2