[PATCH 27/41] ARM: omap1: use pci_remap_iospace() for omap_cf

Arnd Bergmann
2022-04-19T13:51:56Z

The ISA I/O space handling in omap_cf is incompatible with
PCI drivers in a multiplatform kernel, and requires a custom
mach/io.h.

Change the driver to use pci_remap_iospace() like PCI drivers do,
so the generic ioport access can work across platforms.

To actually use that code, we have to select CONFIG_PCI
here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/arm/Kconfig | 2 +-
arch/arm/mach-omap1/include/mach/io.h | 45 ---------------------------
drivers/pcmcia/omap_cf.c | 10 +++---
3 files changed, 5 insertions(+), 52 deletions(-)
delete mode 100644 arch/arm/mach-omap1/include/mach/io.h

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 700655e31b04..a57ad0928edc 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -487,11 +487,11 @@ config ARCH_OMAP1
bool "TI OMAP1"
select ARCH_OMAP
select CLKSRC_MMIO
+ select FORCE_PCI if PCCARD
select GENERIC_IRQ_CHIP
select GPIOLIB
select HAVE_LEGACY_CLK
select IRQ_DOMAIN
- select NEED_MACH_IO_H if PCCARD
select NEED_MACH_MEMORY_H
select SPARSE_IRQ
help
diff --git a/arch/arm/mach-omap1/include/mach/io.h b/arch/arm/mach-omap1/include/mach/io.h
deleted file mode 100644
index ce4f8005b26f..000000000000
--- a/arch/arm/mach-omap1/include/mach/io.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * arch/arm/mach-omap1/include/mach/io.h
- *
- * IO definitions for TI OMAP processors and boards
- *
- * Copied from arch/arm/mach-sa1100/include/mach/io.h
- * Copyright (C) 1997-1999 Russell King
- *
- * 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.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Modifications:
- * 06-12-1997 RMK Created.
- * 07-04-1999 RMK Major cleanup
- */
-
-#ifndef __ASM_ARM_ARCH_IO_H
-#define __ASM_ARM_ARCH_IO_H
-
-#define IO_SPACE_LIMIT 0xffffffff
-
-/*
- * We don't actually have real ISA nor PCI buses, but there is so many
- * drivers out there that might just work if we fake them...
- */
-#define __io(a) __typesafe_io(a)
-
-#endif
diff --git a/drivers/pcmcia/omap_cf.c b/drivers/pcmcia/omap_cf.c
index 093022ce7d91..1972a8f6fa8e 100644
--- a/drivers/pcmcia/omap_cf.c
+++ b/drivers/pcmcia/omap_cf.c
@@ -205,6 +205,7 @@ static int __init omap_cf_probe(struct platform_device *pdev)
int irq;
int status;
struct resource *res;
+ struct resource iospace = DEFINE_RES_IO(SZ_64, SZ_4K);

seg = (int) pdev->dev.platform_data;
if (seg == 0 || seg > 3)
@@ -235,9 +236,9 @@ static int __init omap_cf_probe(struct platform_device *pdev)
cf->phys_cf = res->start;

/* pcmcia layer only remaps "real" memory */
- cf->socket.io_offset = (unsigned long)
- ioremap(cf->phys_cf + SZ_4K, SZ_2K);
- if (!cf->socket.io_offset) {
+ cf->socket.io_offset = iospace.start;
+ status = pci_remap_iospace(&iospace, cf->phys_cf + SZ_4K);
+ if (status) {
status = -ENOMEM;
goto fail1;
}
@@ -285,8 +286,6 @@ static int __init omap_cf_probe(struct platform_device *pdev)
fail2:
release_mem_region(cf->phys_cf, SZ_8K);
fail1:
- if (cf->socket.io_offset)
- iounmap((void __iomem *) cf->socket.io_offset);
free_irq(irq, cf);
fail0:
kfree(cf);
@@ -300,7 +299,6 @@ static int __exit omap_cf_remove(struct platform_device *pdev)
cf->active = 0;
pcmcia_unregister_socket(&cf->socket);
del_timer_sync(&cf->timer);
- iounmap((void __iomem *) cf->socket.io_offset);
release_mem_region(cf->phys_cf, SZ_8K);
free_irq(cf->irq, cf);
kfree(cf);
--
2.29.2