ARM: footbridge: move isa-dma support into footbridge

The dma-isa.c was shared between footbridge and shark a long time ago,
but as shark was removed, it can be made footbridge specific again.

The fb_dma bits in turn are not used at all and can be removed.

All the ISA related files are now built into the platform regardless
of CONFIG_ISA, as they just refer to on-chip devices rather than actual
ISA cards.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 87badea..ec7e48f 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -989,11 +989,6 @@ config ISA
          (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
          newer boards don't support it.  If you have ISA, say Y, otherwise N.
 
-# Select ISA DMA controller support
-config ISA_DMA
-       bool
-       select ISA_DMA_API
-
 # Select ISA DMA interface
 config ISA_DMA_API
        bool

diff --git a/arch/arm/include/asm/mach/dma.h b/arch/arm/include/asm/mach/dma.h
index 1506422..5ec11d7 100644 (file)
--- a/arch/arm/include/asm/mach/dma.h
+++ b/arch/arm/include/asm/mach/dma.h
@@ -44,8 +44,3 @@ struct dma_struct {
  * isa_dma_add - add an ISA-style DMA channel
  */
 extern int isa_dma_add(unsigned int, dma_t *dma);
-
-/*
- * Add the ISA DMA controller.  Always takes channels 0-7.
- */
-extern void isa_init_dma(void);

diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 5538667..95034d3 100644 (file)
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -45,7 +45,6 @@ obj-$(CONFIG_ISA_DMA_API)     += dma.o
 obj-$(CONFIG_FIQ)              += fiq.o fiqasm.o
 obj-$(CONFIG_MODULES)          += armksyms.o module.o
 obj-$(CONFIG_ARM_MODULE_PLTS)  += module-plts.o
-obj-$(CONFIG_ISA_DMA)          += dma-isa.o
 obj-$(CONFIG_PCI)              += bios32.o isa.o
 obj-$(CONFIG_ARM_CPU_SUSPEND)  += sleep.o suspend.o
 obj-$(CONFIG_HIBERNATION)      += hibernate.o

diff --git a/arch/arm/mach-footbridge/Kconfig b/arch/arm/mach-footbridge/Kconfig
index 3497ea8..1a36761 100644 (file)
--- a/arch/arm/mach-footbridge/Kconfig
+++ b/arch/arm/mach-footbridge/Kconfig
@@ -48,7 +48,7 @@ config FOOTBRIDGE
        def_bool y
        select ARCH_HAS_PHYS_TO_DMA
        select ARCH_MIGHT_HAVE_PC_SERIO
-       select ISA_DMA
+       select ISA_DMA_API
 
 config ARCH_EBSA285
        bool

diff --git a/arch/arm/mach-footbridge/Makefile b/arch/arm/mach-footbridge/Makefile
index 30bae66..55d5707 100644 (file)
--- a/arch/arm/mach-footbridge/Makefile
+++ b/arch/arm/mach-footbridge/Makefile
@@ -5,7 +5,7 @@
 
 # Object file lists.
 
-obj-y                  := common.o dma.o isa-irq.o
+obj-y                  := common.o isa-irq.o isa.o isa-rtc.o dma-isa.o
 
 pci-y                  += dc21285.o
 pci-$(CONFIG_ARCH_CATS) += cats-pci.o
@@ -18,4 +18,3 @@ obj-$(CONFIG_ARCH_NETWINDER) += netwinder-hw.o isa-timer.o
 
 obj-$(CONFIG_PCI)      +=$(pci-y)
 
-obj-$(CONFIG_ISA)      += isa.o isa-rtc.o

diff --git a/arch/arm/kernel/dma-isa.c b/arch/arm/mach-footbridge/dma-isa.c
similarity index 98%
rename from arch/arm/kernel/dma-isa.c
rename to arch/arm/mach-footbridge/dma-isa.c
index 2d90ecc..0fc0705 100644 (file)
--- a/arch/arm/kernel/dma-isa.c
+++ b/arch/arm/mach-footbridge/dma-isa.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- *  linux/arch/arm/kernel/dma-isa.c
- *
  *  Copyright (C) 1999-2000 Russell King
  *
  *  ISA DMA primitives
@@ -157,7 +155,7 @@ static dma_t isa_dma[8];
 /*
  * ISA DMA always starts at channel 0
  */
-void __init isa_init_dma(void)
+static int __init isa_dma_init(void)
 {
        /*
         * Try to autodetect presence of an ISA DMA controller.
@@ -222,4 +220,7 @@ void __init isa_init_dma(void)
 
                request_dma(DMA_ISA_CASCADE, "cascade");
        }
+
+       return 0;
 }
+core_initcall(isa_dma_init);

diff --git a/arch/arm/mach-footbridge/dma.c b/arch/arm/mach-footbridge/dma.c
deleted file mode 100644 (file)
index 228757c..0000000
--- a/arch/arm/mach-footbridge/dma.c
+++ /dev/null
@@ -1,57 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/arm/kernel/dma-ebsa285.c
- *
- *  Copyright (C) 1998 Phil Blundell
- *
- * DMA functions specific to EBSA-285/CATS architectures
- *
- *  Changelog:
- *   09-Nov-1998 RMK   Split out ISA DMA functions to dma-isa.c
- *   17-Mar-1999 RMK   Allow any EBSA285-like architecture to have
- *                     ISA DMA controllers.
- */
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-#include <linux/scatterlist.h>
-
-#include <asm/dma.h>
-
-#include <asm/mach/dma.h>
-#include <asm/hardware/dec21285.h>
-
-#if 0
-static int fb_dma_request(unsigned int chan, dma_t *dma)
-{
-       return -EINVAL;
-}
-
-static void fb_dma_enable(unsigned int chan, dma_t *dma)
-{
-}
-
-static void fb_dma_disable(unsigned int chan, dma_t *dma)
-{
-}
-
-static struct dma_ops fb_dma_ops = {
-       .type           = "fb",
-       .request        = fb_dma_request,
-       .enable         = fb_dma_enable,
-       .disable        = fb_dma_disable,
-};
-#endif
-
-static int __init fb_dma_init(void)
-{
-#if 0
-       dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
-       dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
-#endif
-#ifdef CONFIG_ISA_DMA
-       isa_init_dma();
-#endif
-       return 0;
-}
-core_initcall(fb_dma_init);

diff --git a/arch/arm/mach-footbridge/include/mach/isa-dma.h b/arch/arm/mach-footbridge/include/mach/isa-dma.h
index 8a1b991..b10731a 100644 (file)
--- a/arch/arm/mach-footbridge/include/mach/isa-dma.h
+++ b/arch/arm/mach-footbridge/include/mach/isa-dma.h
@@ -10,17 +10,9 @@
 #ifndef __ASM_ARCH_DMA_H
 #define __ASM_ARCH_DMA_H
 
-/*
- * The 21285 has two internal DMA channels; we call these 8 and 9.
- * On CATS hardware we have an additional eight ISA dma channels
- * numbered 0..7.
- */
-#define _ISA_DMA(x)            (0+(x))
-#define _DC21285_DMA(x)                (8+(x))
-
-#define MAX_DMA_CHANNELS       10
+#define MAX_DMA_CHANNELS       8
 
-#define DMA_FLOPPY             _ISA_DMA(2)
-#define DMA_ISA_CASCADE                _ISA_DMA(4)
+#define DMA_FLOPPY             (2)
+#define DMA_ISA_CASCADE                (4)
 
 #endif /* _ASM_ARCH_DMA_H */