staging: drop kpc2000 driver

It seems that the old developer is no longer with the company producing
this device, and the company has no plans on getting this out of the
staging directory at all, so let's drop the driver for now as it's
pretty much abandonded.

If someone want to support this and get it out of staging, we can easily
revert this change and bring it back.

Cc: Matt Sickler <matt.sickler@msk4.com>
Link: https://lore.kernel.org/r/20210610183153.2397760-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 222 deletions

diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
deleted file mode 100644
index 8b9c978257b9..000000000000
--- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h
+++ /dev/null
@@ -1,222 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-#ifndef KPC_DMA_DRIVER_H
-#define KPC_DMA_DRIVER_H
-#include <linux/platform_device.h>
-#include <linux/cdev.h>
-#include <linux/kfifo.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/sched.h>
-#include <linux/miscdevice.h>
-#include <linux/rwsem.h>
-#include <linux/dma-mapping.h>
-#include <linux/dmapool.h>
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/workqueue.h>
-#include <linux/bitops.h>
-#include "../kpc.h"
-
-struct kp2000_device;
-struct kpc_dma_device {
-	struct list_head            list;
-	struct platform_device     *pldev;
-	u32 __iomem                *eng_regs;
-	struct device              *kpc_dma_dev;
-	struct kobject              kobj;
-	char                        name[16];
-
-	int                         dir; // DMA_FROM_DEVICE || DMA_TO_DEVICE
-	struct mutex                sem;
-	unsigned int                irq;
-	struct work_struct          irq_work;
-
-	atomic_t                    open_count;
-
-	size_t                      accumulated_bytes;
-	u32                         accumulated_flags;
-
-	// Descriptor "Pool" housekeeping
-	u32                         desc_pool_cnt;
-	struct dma_pool            *desc_pool;
-	struct kpc_dma_descriptor  *desc_pool_first;
-	struct kpc_dma_descriptor  *desc_pool_last;
-
-	struct kpc_dma_descriptor  *desc_next;
-	struct kpc_dma_descriptor  *desc_completed;
-};
-
-struct dev_private_data {
-	struct kpc_dma_device      *ldev;
-	u64                         card_addr;
-	u64                         user_ctl;
-	u64                         user_ctl_last;
-	u64                         user_sts;
-};
-
-struct kpc_dma_device *kpc_dma_lookup_device(int minor);
-
-extern const struct file_operations  kpc_dma_fops;
-
-#define ENG_CAP_PRESENT                 0x00000001
-#define ENG_CAP_DIRECTION               0x00000002
-#define ENG_CAP_TYPE_MASK               0x000000F0
-#define ENG_CAP_NUMBER_MASK             0x0000FF00
-#define ENG_CAP_CARD_ADDR_SIZE_MASK     0x007F0000
-#define ENG_CAP_DESC_MAX_BYTE_CNT_MASK  0x3F000000
-#define ENG_CAP_PERF_SCALE_MASK         0xC0000000
-
-#define ENG_CTL_IRQ_ENABLE              BIT(0)
-#define ENG_CTL_IRQ_ACTIVE              BIT(1)
-#define ENG_CTL_DESC_COMPLETE           BIT(2)
-#define ENG_CTL_DESC_ALIGN_ERR          BIT(3)
-#define ENG_CTL_DESC_FETCH_ERR          BIT(4)
-#define ENG_CTL_SW_ABORT_ERR            BIT(5)
-#define ENG_CTL_DESC_CHAIN_END          BIT(7)
-#define ENG_CTL_DMA_ENABLE              BIT(8)
-#define ENG_CTL_DMA_RUNNING             BIT(10)
-#define ENG_CTL_DMA_WAITING             BIT(11)
-#define ENG_CTL_DMA_WAITING_PERSIST     BIT(12)
-#define ENG_CTL_DMA_RESET_REQUEST       BIT(14)
-#define ENG_CTL_DMA_RESET               BIT(15)
-#define ENG_CTL_DESC_FETCH_ERR_CLASS_MASK   0x700000
-
-struct aio_cb_data {
-	struct dev_private_data    *priv;
-	struct kpc_dma_device      *ldev;
-	struct completion  *cpl;
-	unsigned char       flags;
-	size_t              len;
-
-	unsigned int        page_count;
-	struct page       **user_pages;
-	struct sg_table     sgt;
-	int                 mapped_entry_count;
-};
-
-#define ACD_FLAG_DONE               0
-#define ACD_FLAG_ABORT              1
-#define ACD_FLAG_ENG_ACCUM_ERROR    4
-#define ACD_FLAG_ENG_ACCUM_SHORT    5
-
-struct kpc_dma_descriptor {
-	struct {
-		volatile u32  DescByteCount              :20;
-		volatile u32  DescStatusErrorFlags       :4;
-		volatile u32  DescStatusFlags            :8;
-	};
-		volatile u32  DescUserControlLS;
-		volatile u32  DescUserControlMS;
-		volatile u32  DescCardAddrLS;
-	struct {
-		volatile u32  DescBufferByteCount        :20;
-		volatile u32  DescCardAddrMS             :4;
-		volatile u32  DescControlFlags           :8;
-	};
-		volatile u32  DescSystemAddrLS;
-		volatile u32  DescSystemAddrMS;
-		volatile u32  DescNextDescPtr;
-
-		dma_addr_t    MyDMAAddr;
-		struct kpc_dma_descriptor   *Next;
-
-		struct aio_cb_data  *acd;
-} __attribute__((packed));
-// DescControlFlags:
-#define DMA_DESC_CTL_SOP            BIT(7)
-#define DMA_DESC_CTL_EOP            BIT(6)
-#define DMA_DESC_CTL_AFIFO          BIT(2)
-#define DMA_DESC_CTL_IRQONERR       BIT(1)
-#define DMA_DESC_CTL_IRQONDONE      BIT(0)
-// DescStatusFlags:
-#define DMA_DESC_STS_SOP            BIT(7)
-#define DMA_DESC_STS_EOP            BIT(6)
-#define DMA_DESC_STS_ERROR          BIT(4)
-#define DMA_DESC_STS_USMSZ          BIT(3)
-#define DMA_DESC_STS_USLSZ          BIT(2)
-#define DMA_DESC_STS_SHORT          BIT(1)
-#define DMA_DESC_STS_COMPLETE       BIT(0)
-// DescStatusErrorFlags:
-#define DMA_DESC_ESTS_ECRC          BIT(2)
-#define DMA_DESC_ESTS_POISON        BIT(1)
-#define DMA_DESC_ESTS_UNSUCCESSFUL  BIT(0)
-
-#define DMA_DESC_ALIGNMENT          0x20
-
-static inline
-u32  GetEngineCapabilities(struct kpc_dma_device *eng)
-{
-	return readl(eng->eng_regs + 0);
-}
-
-static inline
-void  WriteEngineControl(struct kpc_dma_device *eng, u32 value)
-{
-	writel(value, eng->eng_regs + 1);
-}
-
-static inline
-u32  GetEngineControl(struct kpc_dma_device *eng)
-{
-	return readl(eng->eng_regs + 1);
-}
-
-static inline
-void  SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_bits)
-{
-	u32 val = GetEngineControl(eng);
-
-	val |= set_bits;
-	val &= ~clear_bits;
-	WriteEngineControl(eng, val);
-}
-
-static inline
-void  SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
-{
-	writel(desc->MyDMAAddr, eng->eng_regs + 2);
-}
-
-static inline
-void  SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc)
-{
-	writel(desc->MyDMAAddr, eng->eng_regs + 3);
-}
-
-static inline
-void  ClearEngineCompletePtr(struct kpc_dma_device *eng)
-{
-	writel(0, eng->eng_regs + 4);
-}
-
-static inline
-u32  GetEngineCompletePtr(struct kpc_dma_device *eng)
-{
-	return readl(eng->eng_regs + 4);
-}
-
-static inline
-void  lock_engine(struct kpc_dma_device *eng)
-{
-	BUG_ON(!eng);
-	mutex_lock(&eng->sem);
-}
-
-static inline
-void  unlock_engine(struct kpc_dma_device *eng)
-{
-	BUG_ON(!eng);
-	mutex_unlock(&eng->sem);
-}
-
-/// Shared Functions
-void  start_dma_engine(struct kpc_dma_device *eng);
-int   setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt);
-void  stop_dma_engine(struct kpc_dma_device *eng);
-void  destroy_dma_engine(struct kpc_dma_device *eng);
-void  clear_desc(struct kpc_dma_descriptor *desc);
-int   count_descriptors_available(struct kpc_dma_device *eng);
-void  transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags);
-
-#endif /* KPC_DMA_DRIVER_H */
-