Merge branch 'delete-mca' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

Pull the MCA deletion branch from Paul Gortmaker:
 "It was good that we could support MCA machines back in the day, but
  realistically, nobody is using them anymore.  They were mostly limited
  to 386-sx 16MHz CPU and some 486 class machines and never more than
  64MB of RAM.  Even the enthusiast hobbyist community seems to have
  dried up close to ten years ago, based on what you can find searching
  various websites dedicated to the relatively short lived hardware.

  So lets remove the support relating to CONFIG_MCA.  There is no point
  carrying this forward, wasting cycles doing routine maintenance on it;
  wasting allyesconfig build time on validating it, wasting I/O on git
  grep'ping over it, and so on."

Let's see if anybody screams.  It generally has compiled, and James
Bottomley pointed out that there was a MCA extension from NCR that
allowed for up to 4GB of memory and PPro-class machines.  So in *theory*
there may be users out there.

But even James (technically listed as a maintainer) doesn't actually
have a system, and while Alan Cox claims to have a machine in his cellar
that he offered to anybody who wants to take it off his hands, he didn't
argue for keeping MCA support either.

So we could bring it back.  But somebody had better speak up and talk
about how they have actually been using said MCA hardware with modern
kernels for us to do that.  And David already took the patch to delete
all the networking driver code (commit a5e371f61ad3: "drivers/net:
delete all code/drivers depending on CONFIG_MCA").

* 'delete-mca' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
  MCA: delete all remaining traces of microchannel bus support.
  scsi: delete the MCA specific drivers and driver code
  serial: delete the MCA specific 8250 support.
  arm: remove ability to select CONFIG_MCA

5 files changed, 1 insertions, 218 deletions

diff --git a/include/linux/i2o-dev.h b/include/linux/i2o-dev.h
index a0b23dd..a8093bf 100644
--- a/include/linux/i2o-dev.h
+++ b/include/linux/i2o-dev.h
@@ -124,7 +124,7 @@ typedef struct i2o_sg_io_hdr {
 #define I2O_BUS_LOCAL	0
 #define I2O_BUS_ISA	1
 #define I2O_BUS_EISA	2
-#define I2O_BUS_MCA	3
+/* was  I2O_BUS_MCA	3 */
 #define I2O_BUS_PCI	4
 #define I2O_BUS_PCMCIA	5
 #define I2O_BUS_NUBUS	6
diff --git a/include/linux/mca-legacy.h b/include/linux/mca-legacy.h
deleted file mode 100644
index 7a3aea8..0000000
--- a/include/linux/mca-legacy.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8 -*- */
-
-/* This is the function prototypes for the old legacy MCA interface
- *
- * Please move your driver to the new sysfs based one instead */
-
-#ifndef _LINUX_MCA_LEGACY_H
-#define _LINUX_MCA_LEGACY_H
-
-#include <linux/mca.h>
-
-#warning "MCA legacy - please move your driver to the new sysfs api"
-
-/* MCA_NOTFOUND is an error condition.  The other two indicate
- * motherboard POS registers contain the adapter.  They might be
- * returned by the mca_find_adapter() function, and can be used as
- * arguments to mca_read_stored_pos().  I'm not going to allow direct
- * access to the motherboard registers until we run across an adapter
- * that requires it.  We don't know enough about them to know if it's
- * safe.
- *
- * See Documentation/mca.txt or one of the existing drivers for
- * more information.
- */
-#define MCA_NOTFOUND	(-1)
-
-
-
-/* Returns the slot of the first enabled adapter matching id.  User can
- * specify a starting slot beyond zero, to deal with detecting multiple
- * devices.  Returns MCA_NOTFOUND if id not found.  Also checks the
- * integrated adapters.
- */
-extern int mca_find_adapter(int id, int start);
-extern int mca_find_unused_adapter(int id, int start);
-
-extern int mca_mark_as_used(int slot);
-extern void mca_mark_as_unused(int slot);
-
-/* gets a byte out of POS register (stored in memory) */
-extern unsigned char mca_read_stored_pos(int slot, int reg);
-
-/* This can be expanded later.  Right now, it gives us a way of
- * getting meaningful information into the MCA_info structure,
- * so we can have a more interesting /proc/mca.
- */
-extern void mca_set_adapter_name(int slot, char* name);
-
-/* These routines actually mess with the hardware POS registers.  They
- * temporarily disable the device (and interrupts), so make sure you know
- * what you're doing if you use them.  Furthermore, writing to a POS may
- * result in two devices trying to share a resource, which in turn can
- * result in multiple devices sharing memory spaces, IRQs, or even trashing
- * hardware.  YOU HAVE BEEN WARNED.
- *
- * You can only access slots with this.  Motherboard registers are off
- * limits.
- */
-
-/* read a byte from the specified POS register. */
-extern unsigned char mca_read_pos(int slot, int reg);
-
-/* write a byte to the specified POS register. */
-extern void mca_write_pos(int slot, int reg, unsigned char byte);
-
-#endif
diff --git a/include/linux/mca.h b/include/linux/mca.h
deleted file mode 100644
index 3797270..0000000
--- a/include/linux/mca.h
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Header for Microchannel Architecture Bus
- * Written by Martin Kolinek, February 1996
- */
-
-#ifndef _LINUX_MCA_H
-#define _LINUX_MCA_H
-
-#include <linux/device.h>
-
-#ifdef CONFIG_MCA
-#include <asm/mca.h>
-
-extern int MCA_bus;
-#else
-#define MCA_bus 0
-#endif
-
-/* This sets up an information callback for /proc/mca/slot?.  The
- * function is called with the buffer, slot, and device pointer (or
- * some equally informative context information, or nothing, if you
- * prefer), and is expected to put useful information into the
- * buffer.  The adapter name, id, and POS registers get printed
- * before this is called though, so don't do it again.
- *
- * This should be called with a NULL procfn when a module
- * unregisters, thus preventing kernel crashes and other such
- * nastiness.
- */
-typedef int (*MCA_ProcFn)(char* buf, int slot, void* dev);
-
-/* Should only be called by the NMI interrupt handler, this will do some
- * fancy stuff to figure out what might have generated a NMI.
- */
-extern void mca_handle_nmi(void);
-
-enum MCA_AdapterStatus {
-	MCA_ADAPTER_NORMAL = 0,
-	MCA_ADAPTER_NONE = 1,
-	MCA_ADAPTER_DISABLED = 2,
-	MCA_ADAPTER_ERROR = 3
-};
-
-struct mca_device {
-	u64			dma_mask;
-	int			pos_id;
-	int			slot;
-
-	/* index into id_table, set by the bus match routine */
-	int			index;
-
-	/* is there a driver installed? 0 - No, 1 - Yes */
-	int			driver_loaded;
-	/* POS registers */
-	unsigned char		pos[8];
-	/* if a pseudo adapter of the motherboard, this is the motherboard
-	 * register value to use for setup cycles */
-	short			pos_register;
-	
-	enum MCA_AdapterStatus	status;
-#ifdef CONFIG_MCA_PROC_FS
-	/* name of the proc/mca file */
-	char			procname[8];
-	/* /proc info callback */
-	MCA_ProcFn		procfn;
-	/* device/context info for proc callback */
-	void			*proc_dev;
-#endif
-	struct device		dev;
-	char			name[32];
-};
-#define to_mca_device(mdev) container_of(mdev, struct mca_device, dev)
-
-struct mca_bus_accessor_functions {
-	unsigned char	(*mca_read_pos)(struct mca_device *, int reg);
-	void		(*mca_write_pos)(struct mca_device *, int reg,
-					 unsigned char byte);
-	int		(*mca_transform_irq)(struct mca_device *, int irq);
-	int		(*mca_transform_ioport)(struct mca_device *,
-						  int region);
-	void *		(*mca_transform_memory)(struct mca_device *,
-						void *memory);
-};
-
-struct mca_bus {
-	u64			default_dma_mask;
-	int			number;
-	struct mca_bus_accessor_functions f;
-	struct device		dev;
-	char			name[32];
-};
-#define to_mca_bus(mdev) container_of(mdev, struct mca_bus, dev)
-
-struct mca_driver {
-	const short		*id_table;
-	void			*driver_data;
-	int			integrated_id;
-	struct device_driver	driver;
-};
-#define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver)
-
-/* Ongoing supported API functions */
-extern struct mca_device *mca_find_device_by_slot(int slot);
-extern int mca_system_init(void);
-extern struct mca_bus *mca_attach_bus(int);
-
-extern unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev,
-						int reg);
-extern unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg);
-extern void mca_device_write_pos(struct mca_device *mca_dev, int reg,
-				 unsigned char byte);
-extern int mca_device_transform_irq(struct mca_device *mca_dev, int irq);
-extern int mca_device_transform_ioport(struct mca_device *mca_dev, int port);
-extern void *mca_device_transform_memory(struct mca_device *mca_dev,
-					 void *mem);
-extern int mca_device_claimed(struct mca_device *mca_dev);
-extern void mca_device_set_claim(struct mca_device *mca_dev, int val);
-extern void mca_device_set_name(struct mca_device *mca_dev, const char *name);
-static inline char *mca_device_get_name(struct mca_device *mca_dev)
-{
-	return mca_dev ? mca_dev->name : NULL;
-}
-
-extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev);
-
-extern struct bus_type mca_bus_type;
-
-extern int mca_register_driver(struct mca_driver *drv);
-extern int mca_register_driver_integrated(struct mca_driver *, int);
-extern void mca_unregister_driver(struct mca_driver *drv);
-
-/* WARNING: only called by the boot time device setup */
-extern int mca_register_device(int bus, struct mca_device *mca_dev);
-
-#ifdef CONFIG_MCA_PROC_FS
-extern void mca_do_proc_init(void);
-extern void mca_set_adapter_procfn(int slot, MCA_ProcFn, void* dev);
-#else
-static inline void mca_do_proc_init(void)
-{
-}
-
-static inline void mca_set_adapter_procfn(int slot, MCA_ProcFn fn, void* dev)
-{
-}
-#endif
-
-#endif /* _LINUX_MCA_H */
diff --git a/include/linux/serial.h b/include/linux/serial.h
index 441980e..90e9f98 100644
--- a/include/linux/serial.h
+++ b/include/linux/serial.h
@@ -130,7 +130,6 @@ struct serial_uart_config {
 #define ASYNCB_CHECK_CD		25 /* i.e., CLOCAL */
 #define ASYNCB_SHARE_IRQ	24 /* for multifunction cards, no longer used */
 #define ASYNCB_CONS_FLOW	23 /* flow control for console  */
-#define ASYNCB_BOOT_ONLYMCA	22 /* Probe only if MCA bus */
 #define ASYNCB_FIRST_KERNEL	22
 
 #define ASYNC_HUP_NOTIFY	(1U << ASYNCB_HUP_NOTIFY)
@@ -166,7 +165,6 @@ struct serial_uart_config {
 #define ASYNC_CHECK_CD		(1U << ASYNCB_CHECK_CD)
 #define ASYNC_SHARE_IRQ		(1U << ASYNCB_SHARE_IRQ)
 #define ASYNC_CONS_FLOW		(1U << ASYNCB_CONS_FLOW)
-#define ASYNC_BOOT_ONLYMCA	(1U << ASYNCB_BOOT_ONLYMCA)
 #define ASYNC_INTERNAL_FLAGS	(~((1U << ASYNCB_FIRST_KERNEL) - 1))
 
 /*
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 10dbce5..a416e92 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -55,7 +55,6 @@ enum {
 	PLAT8250_DEV_BOCA,
 	PLAT8250_DEV_EXAR_ST16C554,
 	PLAT8250_DEV_HUB6,
-	PLAT8250_DEV_MCA,
 	PLAT8250_DEV_AU1X00,
 	PLAT8250_DEV_SM501,
 };