[media] tw686x-kh: remove obsolete driver

The functionality that was part of the tw686x-kh driver but not of the
mainlined tw686x driver has now been added to the tw686x driver as well.

So this driver no longer adds any functionality not available through
the mainlined driver and it can now be removed.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/Kconfig

@@ -31,8 +31,6 @@ source "drivers/staging/media/omap4iss/Kconfig"
 
 source "drivers/staging/media/pulse8-cec/Kconfig"
 
-source "drivers/staging/media/tw686x-kh/Kconfig"
-
 source "drivers/staging/media/s5p-cec/Kconfig"
 
 # Keep LIRC at the end, as it has sub-menus

drivers/staging/media/Makefile

@@ -6,4 +6,3 @@ obj-$(CONFIG_LIRC_STAGING)	+= lirc/
 obj-$(CONFIG_VIDEO_DM365_VPFE)	+= davinci_vpfe/
 obj-$(CONFIG_VIDEO_OMAP4)	+= omap4iss/
 obj-$(CONFIG_USB_PULSE8_CEC)    += pulse8-cec/
-obj-$(CONFIG_VIDEO_TW686X_KH)	+= tw686x-kh/

drivers/staging/media/tw686x-kh/Kconfig

-config VIDEO_TW686X_KH
-	tristate "Intersil/Techwell TW686x Video For Linux"
-	depends on VIDEO_DEV && PCI && VIDEO_V4L2
-	depends on !(VIDEO_TW686X=y || VIDEO_TW686X=m) || COMPILE_TEST
-	select VIDEOBUF2_DMA_SG
-	help
-	  Support for Intersil/Techwell TW686x-based frame grabber cards.
-
-	  Currently supported chips:
-	  - TW6864 (4 video channels),
-	  - TW6865 (4 video channels, not tested, second generation chip),
-	  - TW6868 (8 video channels but only 4 first channels using
-	    built-in video decoder are supported, not tested),
-	  - TW6869 (8 video channels, second generation chip).
-
-	  To compile this driver as a module, choose M here: the module
-	  will be named tw686x-kh.

drivers/staging/media/tw686x-kh/Makefile

-tw686x-kh-objs := tw686x-kh-core.o tw686x-kh-video.o
-
-obj-$(CONFIG_VIDEO_TW686X_KH) += tw686x-kh.o

drivers/staging/media/tw686x-kh/TODO

-TODO:
-
-- implement V4L2_FIELD_INTERLACED* mode(s).
-- add audio support
-
-Please Cc: patches to Krzysztof Halasa <khalasa@piap.pl>.

drivers/staging/media/tw686x-kh/tw686x-kh-core.c

-/*
- * Copyright (C) 2015 Industrial Research Institute for Automation
- * and Measurements PIAP
- *
- * Written by Krzysztof Ha?asa.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include "tw686x-kh.h"
-#include "tw686x-kh-regs.h"
-
-static irqreturn_t tw686x_irq(int irq, void *dev_id)
-{
-	struct tw686x_dev *dev = (struct tw686x_dev *)dev_id;
-	u32 int_status = reg_read(dev, INT_STATUS); /* cleared on read */
-	unsigned long flags;
-	unsigned int handled = 0;
-
-	if (int_status) {
-		spin_lock_irqsave(&dev->irq_lock, flags);
-		dev->dma_requests |= int_status;
-		spin_unlock_irqrestore(&dev->irq_lock, flags);
-
-		if (int_status & 0xFF0000FF)
-			handled = tw686x_kh_video_irq(dev);
-	}
-
-	return IRQ_RETVAL(handled);
-}
-
-static int tw686x_probe(struct pci_dev *pci_dev,
-			const struct pci_device_id *pci_id)
-{
-	struct tw686x_dev *dev;
-	int err;
-
-	dev = devm_kzalloc(&pci_dev->dev, sizeof(*dev) +
-			   (pci_id->driver_data & TYPE_MAX_CHANNELS) *
-			   sizeof(dev->video_channels[0]), GFP_KERNEL);
-	if (!dev)
-		return -ENOMEM;
-
-	sprintf(dev->name, "TW%04X", pci_dev->device);
-	dev->type = pci_id->driver_data;
-
-	pr_info("%s: PCI %s, IRQ %d, MMIO 0x%lx\n", dev->name,
-		pci_name(pci_dev), pci_dev->irq,
-		(unsigned long)pci_resource_start(pci_dev, 0));
-
-	dev->pci_dev = pci_dev;
-	if (pcim_enable_device(pci_dev))
-		return -EIO;
-
-	pci_set_master(pci_dev);
-
-	if (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32))) {
-		pr_err("%s: 32-bit PCI DMA not supported\n", dev->name);
-		return -EIO;
-	}
-
-	err = pci_request_regions(pci_dev, dev->name);
-	if (err < 0) {
-		pr_err("%s: Unable to get MMIO region\n", dev->name);
-		return err;
-	}
-
-	dev->mmio = pci_ioremap_bar(pci_dev, 0);
-	if (!dev->mmio) {
-		pr_err("%s: Unable to remap MMIO region\n", dev->name);
-		return -EIO;
-	}
-
-	reg_write(dev, SYS_SOFT_RST, 0x0F); /* Reset all subsystems */
-	mdelay(1);
-
-	reg_write(dev, SRST[0], 0x3F);
-	if (max_channels(dev) > 4)
-		reg_write(dev, SRST[1], 0x3F);
-	reg_write(dev, DMA_CMD, 0);
-	reg_write(dev, DMA_CHANNEL_ENABLE, 0);
-	reg_write(dev, DMA_CHANNEL_TIMEOUT, 0x3EFF0FF0);
-	reg_write(dev, DMA_TIMER_INTERVAL, 0x38000);
-	reg_write(dev, DMA_CONFIG, 0xFFFFFF04);
-
-	spin_lock_init(&dev->irq_lock);
-
-	err = devm_request_irq(&pci_dev->dev, pci_dev->irq, tw686x_irq,
-			       IRQF_SHARED, dev->name, dev);
-	if (err < 0) {
-		pr_err("%s: Unable to get IRQ\n", dev->name);
-		return err;
-	}
-
-	err = tw686x_kh_video_init(dev);
-	if (err)
-		return err;
-
-	pci_set_drvdata(pci_dev, dev);
-	return 0;
-}
-
-static void tw686x_remove(struct pci_dev *pci_dev)
-{
-	struct tw686x_dev *dev = pci_get_drvdata(pci_dev);
-
-	tw686x_kh_video_free(dev);
-}
-
-/* driver_data is number of A/V channels */
-static const struct pci_device_id tw686x_pci_tbl[] = {
-	{PCI_DEVICE(0x1797, 0x6864), .driver_data = 4},
-	/* not tested */
-	{PCI_DEVICE(0x1797, 0x6865), .driver_data = 4 | TYPE_SECOND_GEN},
-	/* TW6868 supports 8 A/V channels with an external TW2865 chip -
-	   not supported by the driver */
-	{PCI_DEVICE(0x1797, 0x6868), .driver_data = 4}, /* not tested */
-	{PCI_DEVICE(0x1797, 0x6869), .driver_data = 8 | TYPE_SECOND_GEN},
-	{}
-};
-
-static struct pci_driver tw686x_pci_driver = {
-	.name = "tw686x-kh",
-	.id_table = tw686x_pci_tbl,
-	.probe = tw686x_probe,
-	.remove = tw686x_remove,
-};
-
-MODULE_DESCRIPTION("Driver for video frame grabber cards based on Intersil/Techwell TW686[4589]");
-MODULE_AUTHOR("Krzysztof Halasa");
-MODULE_LICENSE("GPL v2");
-MODULE_DEVICE_TABLE(pci, tw686x_pci_tbl);
-module_pci_driver(tw686x_pci_driver);

drivers/staging/media/tw686x-kh/tw686x-kh-regs.h

-/* DMA controller registers */
-#define REG8_1(a0) ((const u16[8]) {a0, a0 + 1, a0 + 2, a0 + 3,	\
-				   a0 + 4, a0 + 5, a0 + 6, a0 + 7})
-#define REG8_2(a0) ((const u16[8]) {a0, a0 + 2, a0 + 4, a0 + 6,	\
-				   a0 + 8, a0 + 0xA, a0 + 0xC, a0 + 0xE})
-#define REG8_8(a0) ((const u16[8]) {a0, a0 + 8, a0 + 0x10, a0 + 0x18,	\
-				   a0 + 0x20, a0 + 0x28, a0 + 0x30, a0 + 0x38})
-#define INT_STATUS		0x00
-#define PB_STATUS		0x01
-#define DMA_CMD			0x02
-#define VIDEO_FIFO_STATUS	0x03
-#define VIDEO_CHANNEL_ID	0x04
-#define VIDEO_PARSER_STATUS	0x05
-#define SYS_SOFT_RST		0x06
-#define DMA_PAGE_TABLE0_ADDR	((const u16[8]) {0x08, 0xD0, 0xD2, 0xD4, \
-						0xD6, 0xD8, 0xDA, 0xDC})
-#define DMA_PAGE_TABLE1_ADDR	((const u16[8]) {0x09, 0xD1, 0xD3, 0xD5, \
-						0xD7, 0xD9, 0xDB, 0xDD})
-#define DMA_CHANNEL_ENABLE	0x0A
-#define DMA_CONFIG		0x0B
-#define DMA_TIMER_INTERVAL	0x0C
-#define DMA_CHANNEL_TIMEOUT	0x0D
-#define VDMA_CHANNEL_CONFIG	REG8_1(0x10)
-#define ADMA_P_ADDR		REG8_2(0x18)
-#define ADMA_B_ADDR		REG8_2(0x19)
-#define DMA10_P_ADDR		0x28 /* ??? */
-#define DMA10_B_ADDR		0x29
-#define VIDEO_CONTROL1		0x2A
-#define VIDEO_CONTROL2		0x2B
-#define AUDIO_CONTROL1		0x2C
-#define AUDIO_CONTROL2		0x2D
-#define PHASE_REF		0x2E
-#define GPIO_REG		0x2F
-#define INTL_HBAR_CTRL		REG8_1(0x30)
-#define AUDIO_CONTROL3		0x38
-#define VIDEO_FIELD_CTRL	REG8_1(0x39)
-#define HSCALER_CTRL		REG8_1(0x42)
-#define VIDEO_SIZE		REG8_1(0x4A)
-#define VIDEO_SIZE_F2		REG8_1(0x52)
-#define MD_CONF			REG8_1(0x60)
-#define MD_INIT			REG8_1(0x68)
-#define MD_MAP0			REG8_1(0x70)
-#define VDMA_P_ADDR		REG8_8(0x80) /* not used in DMA SG mode */
-#define VDMA_WHP		REG8_8(0x81)
-#define VDMA_B_ADDR		REG8_8(0x82)
-#define VDMA_F2_P_ADDR		REG8_8(0x84)
-#define VDMA_F2_WHP		REG8_8(0x85)
-#define VDMA_F2_B_ADDR		REG8_8(0x86)
-#define EP_REG_ADDR		0xFE
-#define EP_REG_DATA		0xFF
-
-/* Video decoder registers */
-#define VDREG8(a0) ((const u16[8]) {			\
-	a0 + 0x000, a0 + 0x010, a0 + 0x020, a0 + 0x030,	\
-	a0 + 0x100, a0 + 0x110, a0 + 0x120, a0 + 0x130})
-#define VIDSTAT			VDREG8(0x100)
-#define BRIGHT			VDREG8(0x101)
-#define CONTRAST		VDREG8(0x102)
-#define SHARPNESS		VDREG8(0x103)
-#define SAT_U			VDREG8(0x104)
-#define SAT_V			VDREG8(0x105)
-#define HUE			VDREG8(0x106)
-#define CROP_HI			VDREG8(0x107)
-#define VDELAY_LO		VDREG8(0x108)
-#define VACTIVE_LO		VDREG8(0x109)
-#define HDELAY_LO		VDREG8(0x10A)
-#define HACTIVE_LO		VDREG8(0x10B)
-#define MVSN			VDREG8(0x10C)
-#define STATUS2			VDREG8(0x10C)
-#define SDT			VDREG8(0x10E)
-#define SDT_EN			VDREG8(0x10F)
-
-#define VSCALE_LO		VDREG8(0x144)
-#define SCALE_HI		VDREG8(0x145)
-#define HSCALE_LO		VDREG8(0x146)
-#define F2CROP_HI		VDREG8(0x147)
-#define F2VDELAY_LO		VDREG8(0x148)
-#define F2VACTIVE_LO		VDREG8(0x149)
-#define F2HDELAY_LO		VDREG8(0x14A)
-#define F2HACTIVE_LO		VDREG8(0x14B)
-#define F2VSCALE_LO		VDREG8(0x14C)
-#define F2SCALE_HI		VDREG8(0x14D)
-#define F2HSCALE_LO		VDREG8(0x14E)
-#define F2CNT			VDREG8(0x14F)
-
-#define VDREG2(a0) ((const u16[2]) {a0, a0 + 0x100})
-#define SRST			VDREG2(0x180)
-#define ACNTL			VDREG2(0x181)
-#define ACNTL2			VDREG2(0x182)
-#define CNTRL1			VDREG2(0x183)
-#define CKHY			VDREG2(0x184)
-#define SHCOR			VDREG2(0x185)
-#define CORING			VDREG2(0x186)
-#define CLMPG			VDREG2(0x187)
-#define IAGC			VDREG2(0x188)
-#define VCTRL1			VDREG2(0x18F)
-#define MISC1			VDREG2(0x194)
-#define LOOP			VDREG2(0x195)
-#define MISC2			VDREG2(0x196)
-
-#define CLMD			VDREG2(0x197)
-#define AIGAIN			((const u16[8]) {0x1D0, 0x1D1, 0x1D2, 0x1D3, \
-						 0x2D0, 0x2D1, 0x2D2, 0x2D3})

drivers/staging/media/tw686x-kh/tw686x-kh.h

-/*
- * Copyright (C) 2015 Industrial Research Institute for Automation
- * and Measurements PIAP
- *
- * Written by Krzysztof Ha?asa.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- */
-
-#include <linux/delay.h>
-#include <linux/freezer.h>
-#include <linux/interrupt.h>
-#include <linux/kthread.h>
-#include <linux/mutex.h>
-#include <linux/pci.h>
-#include <media/videobuf2-dma-sg.h>
-#include <linux/videodev2.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-ioctl.h>
-
-#define TYPE_MAX_CHANNELS 0x0F
-#define TYPE_SECOND_GEN   0x10
-
-struct tw686x_format {
-	char *name;
-	unsigned int fourcc;
-	unsigned int depth;
-	unsigned int mode;
-};
-
-struct dma_desc {
-	dma_addr_t phys;
-	void *virt;
-	unsigned int size;
-};
-
-struct vdma_desc {
-	__le32 flags_length;	/* 3 MSBits for flags, 13 LSBits for length */
-	__le32 phys;
-};
-
-struct tw686x_vb2_buf {
-	struct vb2_v4l2_buffer vb;
-	struct list_head list;
-};
-
-struct tw686x_video_channel {
-	struct tw686x_dev *dev;
-
-	struct vb2_queue vidq;
-	struct list_head vidq_queued;
-	struct video_device *device;
-	struct dma_desc sg_tables[2];
-	struct tw686x_vb2_buf *curr_bufs[2];
-	struct vdma_desc *sg_descs[2];
-
-	struct v4l2_ctrl_handler ctrl_handler;
-	const struct tw686x_format *format;
-	struct mutex vb_mutex;
-	spinlock_t qlock;
-	v4l2_std_id video_standard;
-	unsigned int width, height;
-	enum v4l2_field field; /* supported TOP, BOTTOM, SEQ_TB and SEQ_BT */
-	unsigned int seq;	       /* video field or frame counter */
-	unsigned int ch;
-};
-
-/* global device status */
-struct tw686x_dev {
-	spinlock_t irq_lock;
-
-	struct v4l2_device v4l2_dev;
-	struct snd_card *card;	/* sound card */
-
-	unsigned int video_active;	/* active video channel mask */
-
-	char name[32];
-	unsigned int type;
-	struct pci_dev *pci_dev;
-	__u32 __iomem *mmio;
-
-	struct task_struct *video_thread;
-	wait_queue_head_t video_thread_wait;
-	u32 dma_requests;
-
-	struct tw686x_video_channel video_channels[0];
-};
-
-static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg)
-{
-	return readl(dev->mmio + reg);
-}
-
-static inline void reg_write(struct tw686x_dev *dev, unsigned int reg,
-			     uint32_t value)
-{
-	writel(value, dev->mmio + reg);
-}
-
-static inline unsigned int max_channels(struct tw686x_dev *dev)
-{
-	return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */
-}
-
-static inline unsigned int is_second_gen(struct tw686x_dev *dev)
-{
-	/* each channel has its own DMA SG table */
-	return dev->type & TYPE_SECOND_GEN;
-}
-
-int tw686x_kh_video_irq(struct tw686x_dev *dev);
-int tw686x_kh_video_init(struct tw686x_dev *dev);
-void tw686x_kh_video_free(struct tw686x_dev *dev);