linux-kernel - Re: [PATCH 14/22] ARM: omap1: use pci_ioremap_io() for omap

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Date:   Tue, 13 Aug 2019 03:36:05 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Aaro Koskinen <aaro.koskinen@....fi>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/22] ARM: omap1: use pci_ioremap_io() for omap_cf

Hi,

* Arnd Bergmann <arnd@...db.de> [190808 21:34]:
> 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_ioremap_io() 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@...db.de>

Looks like this series boots for me on 5912osk up to this
patch, but this patch breaks booting somehow.

Any ideas for fixes?

Regards,

Tony

> ---
>  arch/arm/Kconfig                      |  2 +-
>  arch/arm/mach-omap1/include/mach/io.h | 45 ---------------------------
>  drivers/pcmcia/omap_cf.c              |  9 ++----
>  3 files changed, 4 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 b7162ac8d756..8263fe7a5e64 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -496,13 +496,13 @@ config ARCH_OMAP1
>  	select ARCH_OMAP
>  	select CLKDEV_LOOKUP
>  	select CLKSRC_MMIO
> +	select FORCE_PCI if PCCARD
>  	select GENERIC_CLOCKEVENTS
>  	select GENERIC_IRQ_CHIP
>  	select GENERIC_IRQ_MULTI_HANDLER
>  	select GPIOLIB
>  	select HAVE_IDE
>  	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 98df6473034d..9f8ad82f5fce 100644
> --- a/drivers/pcmcia/omap_cf.c
> +++ b/drivers/pcmcia/omap_cf.c
> @@ -235,9 +235,9 @@ 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 = 0x10000;
> +	status = pci_ioremap_io(cf->socket.io_offset, cf->phys_cf + SZ_4K);
> +	if (status)
>  		goto fail1;
>  
>  	if (!request_mem_region(cf->phys_cf, SZ_8K, driver_name))
> @@ -281,8 +281,6 @@ 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);
> @@ -296,7 +294,6 @@ 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);
> -- 
> 2.20.0
>