Staging: Remove staging/poch

Remove staging/poch.

Reasons for removal are -- The driver has serious cache
issues, that I couldn't fix. The card vendor is working
on a better replacement for the driver. The driver has
been delayed a lot and development has come to a stand
still.
Signed-off-by: Vijay Kumar B. <vijaykumar@bravegnu.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Kconfig

@@ -57,8 +57,6 @@ source "drivers/staging/wlan-ng/Kconfig"
 
 source "drivers/staging/echo/Kconfig"
 
-source "drivers/staging/poch/Kconfig"
-
 source "drivers/staging/otus/Kconfig"
 
 source "drivers/staging/rt2860/Kconfig"

drivers/staging/Makefile

@@ -11,7 +11,6 @@ obj-$(CONFIG_USB_IP_COMMON)	+= usbip/
 obj-$(CONFIG_W35UND)		+= winbond/
 obj-$(CONFIG_PRISM2_USB)	+= wlan-ng/
 obj-$(CONFIG_ECHO)		+= echo/
-obj-$(CONFIG_POCH)		+= poch/
 obj-$(CONFIG_OTUS)		+= otus/
 obj-$(CONFIG_RT2860)		+= rt2860/
 obj-$(CONFIG_RT2870)		+= rt2870/

drivers/staging/poch/Kconfig

-config POCH
-	tristate "Redrapids Pocket Change CardBus support"
-	depends on PCI && UIO
-	default N
-	---help---
-	  Enable support for Redrapids Pocket Change CardBus devices.

drivers/staging/poch/Makefile

-obj-$(CONFIG_POCH)		+= poch.o

drivers/staging/poch/README

-TODO:
-	- Rx block size is limited to < 2048, hardware bug?
-	- Group size is limited to < page size, kernel alloc/mmap API issues
-	- test whether Tx is transmitting data from provided buffers
-	- handle device unplug case
-	- handle temperature above threshold
-	- use bus address instead of physical address for DMA
-	- support for snapshot mode
-	- audit userspace interfaces
-	- get reserved major/minor if needed
-
-Sample Code:
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <poll.h>
-#include <stdio.h>
-#include <error.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdint.h>
-
-#include <sysfs/libsysfs.h>
-
-#include <poch.h>
-
-struct pconsume {
-	uint32_t * offsets;
-	uint32_t nfetch;
-	uint32_t nflush;
-};
-
-uint32_t offsets[10];
-
-void process_group(unsigned char *buf, uint32_t size)
-{
-	uint16_t *buf16 = (uint16_t *)buf;
-
-	printf("RX: %p %u %04x %04x %04x %04x %04x %04x\n", buf, size,
-	       buf16[0], buf16[1], buf16[2], buf16[3], buf16[4], buf16[5]);
-}
-
-int main()
-{
-	struct sysfs_attribute *attr;
-	char *path;
-	int ret;
-	unsigned long mmap_size;
-	int fd;
-	unsigned char *cbuf;
-
-	uint32_t nflush;
-	struct pollfd poll_fds;
-	int count = 0;
-	int i;
-
-	path = "/sys/class/pocketchange/poch0/ch0/block_size";
-	attr = sysfs_open_attribute(path);
-	ret = sysfs_write_attribute(attr, "256", strlen("256"));
-	if (ret == -1)
-		error(1, errno, "error writing attribute %s", path);
-	sysfs_close_attribute(attr);
-
-	path = "/sys/class/pocketchange/poch0/ch0/group_size";
-	attr = sysfs_open_attribute(path);
-	ret = sysfs_write_attribute(attr, "4096", strlen("4096"));
-	if (ret == -1)
-		error(1, errno, "error writing attribute %s", path);
-	sysfs_close_attribute(attr);
-
-	path = "/sys/class/pocketchange/poch0/ch0/group_count";
-	attr = sysfs_open_attribute(path);
-	ret = sysfs_write_attribute(attr, "64", strlen("64"));
-	if (ret == -1)
-		error(1, errno, "error writing attribute %s", path);
-	sysfs_close_attribute(attr);
-
-	fd = open("/dev/ch0", O_RDWR);
-	if (fd == -1)
-		error(1, errno, "error opening device node");
-
-	path = "/sys/class/pocketchange/poch0/ch0/mmap_size";
-	attr = sysfs_open_attribute(path);
-	ret = sysfs_read_attribute(attr);
-	if (ret == -1)
-		error(1, errno, "error reading attribute %s", path);
-	printf("%s", attr->value);
-	sscanf(attr->value, "%lu", &mmap_size);
-	sysfs_close_attribute(attr);
-
-	cbuf = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
-		    MAP_PRIVATE, fd, 0);
-	if (cbuf == MAP_FAILED)
-		error(1, errno, "error mapping DMA buffers");
-
-	ret = ioctl(fd, POCH_IOC_TRANSFER_START, 0);
-	if (ret == -1)
-		error(1, errno, "error starting transfer");
-
-	nflush = 0;
-	while (1) {
-		struct pconsume consume;
-
-		consume.offsets = offsets;
-		consume.nfetch = 10;
-		consume.nflush = nflush;
-
-		ret = ioctl(fd, POCH_IOC_CONSUME, &consume);
-		if (ret == -1)
-			error(1, errno, "error consuming groups");
-
-		nflush = consume.nfetch;
-
-		for (i = 0; i < nflush; i++) {
-			process_group(cbuf + consume.offsets[i], 4096);
-
-			count++;
-			if (count == 1000)
-				break;
-		}
-
-		if (count == 1000)
-			break;
-	}
-
-	ret = ioctl(fd, POCH_IOC_TRANSFER_STOP, 0);
-	if (ret == -1)
-		error(1, errno, "error starting transfer");
-
-	return 0;
-}
-
-Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
-Vijay Kumar <vijaykumar@bravegnu.org> and Jaya Kumar <jayakumar.lkml@gmail.com>

drivers/staging/poch/poch.h

-/*
- * User-space DMA and UIO based Redrapids Pocket Change CardBus driver
- *
- * Copyright 2008 Vijay Kumar <vijaykumar@bravegnu.org>
- *
- * Part of userspace API. Should be moved to a header file in
- * include/linux for final version.
- *
- */
-
-#include <linux/types.h>
-
-struct poch_counters {
-	__u32 fifo_empty;
-	__u32 fifo_overflow;
-	__u32 pll_unlock;
-};
-
-struct poch_consume {
-	__u32 __user *offsets;
-	__u32 nfetch;
-	__u32 nflush;
-};
-
-#define POCH_IOC_NUM			'9'
-
-#define POCH_IOC_TRANSFER_START		_IO(POCH_IOC_NUM, 0)
-#define POCH_IOC_TRANSFER_STOP		_IO(POCH_IOC_NUM, 1)
-#define POCH_IOC_GET_COUNTERS		_IOR(POCH_IOC_NUM, 2, \
-					     struct poch_counters)
-#define POCH_IOC_SYNC_GROUP_FOR_USER	_IO(POCH_IOC_NUM, 3)
-#define POCH_IOC_SYNC_GROUP_FOR_DEVICE	_IO(POCH_IOC_NUM, 4)
-
-#define POCH_IOC_CONSUME		_IOWR(POCH_IOC_NUM, 5, \
-					      struct poch_consume)