media: staging: atomisp: Remove driver

The atomisp driver has a long list of todo items and little has been done
to address these lately while more has been added. The driver is also not
functional. In other words, the driver would not be getting out of staging
in the foreseeable future. At the same time it consumes developer
resources in order to maintain the flaky code base. Remove it.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 0 insertions, 442 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/atomisp_csi2.c b/drivers/staging/media/atomisp/pci/atomisp2/atomisp_csi2.c
deleted file mode 100644
index fa03b78c3580..000000000000
--- a/drivers/staging/media/atomisp/pci/atomisp2/atomisp_csi2.c
+++ /dev/null
@@ -1,442 +0,0 @@
-/*
- * Support for Medifield PNW Camera Imaging ISP subsystem.
- *
- * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- *
- */
-
-#include <media/v4l2-event.h>
-#include <media/v4l2-mediabus.h>
-#include "atomisp_cmd.h"
-#include "atomisp_internal.h"
-#include "atomisp-regs.h"
-
-static struct v4l2_mbus_framefmt *__csi2_get_format(struct
-						    atomisp_mipi_csi2_device
-						    *csi2,
-						    struct
-						    v4l2_subdev_pad_config *cfg,
-						    enum
-						    v4l2_subdev_format_whence
-						    which, unsigned int pad)
-{
-	if (which == V4L2_SUBDEV_FORMAT_TRY)
-		return v4l2_subdev_get_try_format(&csi2->subdev, cfg, pad);
-	else
-		return &csi2->formats[pad];
-}
-
-/*
- * csi2_enum_mbus_code - Handle pixel format enumeration
- * @sd     : pointer to v4l2 subdev structure
- * @fh     : V4L2 subdev file handle
- * @code   : pointer to v4l2_subdev_pad_mbus_code_enum structure
- * return -EINVAL or zero on success
-*/
-static int csi2_enum_mbus_code(struct v4l2_subdev *sd,
-			       struct v4l2_subdev_pad_config *cfg,
-			       struct v4l2_subdev_mbus_code_enum *code)
-{
-	const struct atomisp_in_fmt_conv *ic = atomisp_in_fmt_conv;
-	unsigned int i = 0;
-
-	while (ic->code) {
-		if (i == code->index) {
-			code->code = ic->code;
-			return 0;
-		}
-		i++, ic++;
-	}
-
-	return -EINVAL;
-}
-
-/*
- * csi2_get_format - Handle get format by pads subdev method
- * @sd : pointer to v4l2 subdev structure
- * @fh : V4L2 subdev file handle
- * @pad: pad num
- * @fmt: pointer to v4l2 format structure
- * return -EINVAL or zero on sucess
-*/
-static int csi2_get_format(struct v4l2_subdev *sd,
-			   struct v4l2_subdev_pad_config *cfg,
-			   struct v4l2_subdev_format *fmt)
-{
-	struct atomisp_mipi_csi2_device *csi2 = v4l2_get_subdevdata(sd);
-	struct v4l2_mbus_framefmt *format;
-
-	format = __csi2_get_format(csi2, cfg, fmt->which, fmt->pad);
-
-	fmt->format = *format;
-
-	return 0;
-}
-
-int atomisp_csi2_set_ffmt(struct v4l2_subdev *sd,
-			  struct v4l2_subdev_pad_config *cfg,
-			  unsigned int which, uint16_t pad,
-			  struct v4l2_mbus_framefmt *ffmt)
-{
-	struct atomisp_mipi_csi2_device *csi2 = v4l2_get_subdevdata(sd);
-	struct v4l2_mbus_framefmt *actual_ffmt =
-#ifndef ISP2401
-		__csi2_get_format(csi2, cfg, which, pad);
-#else
-	    __csi2_get_format(csi2, cfg, which, pad);
-#endif
-
-	if (pad == CSI2_PAD_SINK) {
-		const struct atomisp_in_fmt_conv *ic;
-		struct v4l2_mbus_framefmt tmp_ffmt;
-
-		ic = atomisp_find_in_fmt_conv(ffmt->code);
-		if (ic)
-			actual_ffmt->code = ic->code;
-		else
-			actual_ffmt->code = atomisp_in_fmt_conv[0].code;
-
-		actual_ffmt->width = clamp_t(
-			u32, ffmt->width, ATOM_ISP_MIN_WIDTH,
-			ATOM_ISP_MAX_WIDTH);
-		actual_ffmt->height = clamp_t(
-			u32, ffmt->height, ATOM_ISP_MIN_HEIGHT,
-			ATOM_ISP_MAX_HEIGHT);
-
-		tmp_ffmt = *ffmt = *actual_ffmt;
-
-		return atomisp_csi2_set_ffmt(sd, cfg, which, CSI2_PAD_SOURCE,
-					     &tmp_ffmt);
-	}
-
-	/* FIXME: DPCM decompression */
-	*actual_ffmt = *ffmt =
-#ifndef ISP2401
-		*__csi2_get_format(csi2, cfg, which, CSI2_PAD_SINK);
-#else
-	    *__csi2_get_format(csi2, cfg, which, CSI2_PAD_SINK);
-#endif
-
-	return 0;
-}
-
-/*
- * csi2_set_format - Handle set format by pads subdev method
- * @sd : pointer to v4l2 subdev structure
- * @fh : V4L2 subdev file handle
- * @pad: pad num
- * @fmt: pointer to v4l2 format structure
- * return -EINVAL or zero on success
-*/
-static int csi2_set_format(struct v4l2_subdev *sd,
-			   struct v4l2_subdev_pad_config *cfg,
-			   struct v4l2_subdev_format *fmt)
-{
-	return atomisp_csi2_set_ffmt(sd, cfg, fmt->which, fmt->pad,
-				     &fmt->format);
-}
-
-/*
- * csi2_set_stream - Enable/Disable streaming on the CSI2 module
- * @sd: ISP CSI2 V4L2 subdevice
- * @enable: Enable/disable stream (1/0)
- *
- * Return 0 on success or a negative error code otherwise.
-*/
-static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
-{
-	 return 0;
-}
-
-/* subdev core operations */
-static const struct v4l2_subdev_core_ops csi2_core_ops = {
-};
-
-/* subdev video operations */
-static const struct v4l2_subdev_video_ops csi2_video_ops = {
-	.s_stream = csi2_set_stream,
-};
-
-/* subdev pad operations */
-static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
-	.enum_mbus_code = csi2_enum_mbus_code,
-	.get_fmt = csi2_get_format,
-	.set_fmt = csi2_set_format,
-	.link_validate = v4l2_subdev_link_validate_default,
-};
-
-/* subdev operations */
-static const struct v4l2_subdev_ops csi2_ops = {
-	.core = &csi2_core_ops,
-	.video = &csi2_video_ops,
-	.pad = &csi2_pad_ops,
-};
-
-#ifndef ISP2401
-
-#endif
-/*
- * csi2_link_setup - Setup CSI2 connections.
- * @entity : Pointer to media entity structure
- * @local  : Pointer to local pad array
- * @remote : Pointer to remote pad array
- * @flags  : Link flags
- * return -EINVAL or zero on success
-*/
-static int csi2_link_setup(struct media_entity *entity,
-	    const struct media_pad *local,
-	    const struct media_pad *remote, u32 flags)
-{
-	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
-	struct atomisp_mipi_csi2_device *csi2 = v4l2_get_subdevdata(sd);
-	u32 result = local->index | is_media_entity_v4l2_subdev(remote->entity);
-
-	switch (result) {
-	case CSI2_PAD_SOURCE | MEDIA_ENT_F_OLD_BASE:
-		/* not supported yet */
-		return -EINVAL;
-
-	case CSI2_PAD_SOURCE | MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN:
-		if (flags & MEDIA_LNK_FL_ENABLED) {
-			if (csi2->output & ~CSI2_OUTPUT_ISP_SUBDEV)
-				return -EBUSY;
-			csi2->output |= CSI2_OUTPUT_ISP_SUBDEV;
-		} else {
-			csi2->output &= ~CSI2_OUTPUT_ISP_SUBDEV;
-		}
-		break;
-
-	default:
-		/* Link from camera to CSI2 is fixed... */
-		return -EINVAL;
-	}
-	return 0;
-}
-
-/* media operations */
-static const struct media_entity_operations csi2_media_ops = {
-	.link_setup = csi2_link_setup,
-	.link_validate = v4l2_subdev_link_validate,
-};
-
-/*
-* ispcsi2_init_entities - Initialize subdev and media entity.
-* @csi2: Pointer to ispcsi2 structure.
-* return -ENOMEM or zero on success
-*/
-static int mipi_csi2_init_entities(struct atomisp_mipi_csi2_device *csi2,
-					int port)
-{
-	struct v4l2_subdev *sd = &csi2->subdev;
-	struct media_pad *pads = csi2->pads;
-	struct media_entity *me = &sd->entity;
-	int ret;
-
-	v4l2_subdev_init(sd, &csi2_ops);
-	snprintf(sd->name, sizeof(sd->name), "ATOM ISP CSI2-port%d", port);
-
-	v4l2_set_subdevdata(sd, csi2);
-	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
-
-	pads[CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
-	pads[CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
-
-	me->ops = &csi2_media_ops;
-	me->function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
-	ret = media_entity_pads_init(me, CSI2_PADS_NUM, pads);
-	if (ret < 0)
-		return ret;
-
-	csi2->formats[CSI2_PAD_SINK].code =
-		csi2->formats[CSI2_PAD_SOURCE].code =
-		atomisp_in_fmt_conv[0].code;
-
-	return 0;
-}
-
-void
-atomisp_mipi_csi2_unregister_entities(struct atomisp_mipi_csi2_device *csi2)
-{
-	media_entity_cleanup(&csi2->subdev.entity);
-	v4l2_device_unregister_subdev(&csi2->subdev);
-}
-
-int atomisp_mipi_csi2_register_entities(struct atomisp_mipi_csi2_device *csi2,
-			struct v4l2_device *vdev)
-{
-	int ret;
-
-	/* Register the subdev and video nodes. */
-	ret = v4l2_device_register_subdev(vdev, &csi2->subdev);
-	if (ret < 0)
-		goto error;
-
-	return 0;
-
-error:
-	atomisp_mipi_csi2_unregister_entities(csi2);
-	return ret;
-}
-
-static const int LIMIT_SHIFT = 6;	/* Limit numeric range into 31 bits */
-
-static int
-atomisp_csi2_configure_calc(const short int coeffs[2], int mipi_freq, int def)
-{
-	/* Delay counter accuracy, 1/0.0625 for ANN/CHT, 1/0.125 for BXT */
-	static const int accinv = 16;		/* 1 / COUNT_ACC */
-	int r;
-
-	if (mipi_freq >> LIMIT_SHIFT <= 0)
-		return def;
-
-	r = accinv * coeffs[1] * (500000000 >> LIMIT_SHIFT);
-	r /= mipi_freq >> LIMIT_SHIFT;
-	r += accinv * coeffs[0];
-
-	return r;
-}
-
-static void atomisp_csi2_configure_isp2401(struct atomisp_sub_device *asd)
-{
-	/*
-	 * The ISP2401 new input system CSI2+ receiver has several
-	 * parameters affecting the receiver timings. These depend
-	 * on the MIPI bus frequency F in Hz (sensor transmitter rate)
-	 * as follows:
-	 *	register value = (A/1e9 + B * UI) / COUNT_ACC
-	 * where
-	 *	UI = 1 / (2 * F) in seconds
-	 *	COUNT_ACC = counter accuracy in seconds
-	 *	For ANN and CHV, COUNT_ACC = 0.0625 ns
-	 *	For BXT,  COUNT_ACC = 0.125 ns
-	 * A and B are coefficients from the table below,
-	 * depending whether the register minimum or maximum value is
-	 * calculated.
-	 *				       Minimum     Maximum
-	 * Clock lane			       A     B     A     B
-	 * reg_rx_csi_dly_cnt_termen_clane     0     0    38     0
-	 * reg_rx_csi_dly_cnt_settle_clane    95    -8   300   -16
-	 * Data lanes
-	 * reg_rx_csi_dly_cnt_termen_dlane0    0     0    35     4
-	 * reg_rx_csi_dly_cnt_settle_dlane0   85    -2   145    -6
-	 * reg_rx_csi_dly_cnt_termen_dlane1    0     0    35     4
-	 * reg_rx_csi_dly_cnt_settle_dlane1   85    -2   145    -6
-	 * reg_rx_csi_dly_cnt_termen_dlane2    0     0    35     4
-	 * reg_rx_csi_dly_cnt_settle_dlane2   85    -2   145    -6
-	 * reg_rx_csi_dly_cnt_termen_dlane3    0     0    35     4
-	 * reg_rx_csi_dly_cnt_settle_dlane3   85    -2   145    -6
-	 *
-	 * We use the minimum values in the calculations below.
-	 */
-	static const short int coeff_clk_termen[] = { 0, 0 };
-	static const short int coeff_clk_settle[] = { 95, -8 };
-	static const short int coeff_dat_termen[] = { 0, 0 };
-	static const short int coeff_dat_settle[] = { 85, -2 };
-	static const int TERMEN_DEFAULT		  = 0 * 0;
-	static const int SETTLE_DEFAULT		  = 0x480;
-	static const hrt_address csi2_port_base[] = {
-		[ATOMISP_CAMERA_PORT_PRIMARY]     = CSI2_PORT_A_BASE,
-		[ATOMISP_CAMERA_PORT_SECONDARY]   = CSI2_PORT_B_BASE,
-		[ATOMISP_CAMERA_PORT_TERTIARY]    = CSI2_PORT_C_BASE,
-	};
-	/* Number of lanes on each port, excluding clock lane */
-	static const unsigned char csi2_port_lanes[] = {
-		[ATOMISP_CAMERA_PORT_PRIMARY]     = 4,
-		[ATOMISP_CAMERA_PORT_SECONDARY]   = 2,
-		[ATOMISP_CAMERA_PORT_TERTIARY]    = 2,
-	};
-	static const hrt_address csi2_lane_base[] = {
-		CSI2_LANE_CL_BASE,
-		CSI2_LANE_D0_BASE,
-		CSI2_LANE_D1_BASE,
-		CSI2_LANE_D2_BASE,
-		CSI2_LANE_D3_BASE,
-	};
-
-	int clk_termen;
-	int clk_settle;
-	int dat_termen;
-	int dat_settle;
-
-	struct v4l2_control ctrl;
-	struct atomisp_device *isp = asd->isp;
-	struct camera_mipi_info *mipi_info;
-	int mipi_freq = 0;
-	enum atomisp_camera_port port;
-
-	int n;
-
-	mipi_info = atomisp_to_sensor_mipi_info(
-					isp->inputs[asd->input_curr].camera);
-	port = mipi_info->port;
-
-	ctrl.id = V4L2_CID_LINK_FREQ;
-	if (v4l2_g_ctrl
-	    (isp->inputs[asd->input_curr].camera->ctrl_handler, &ctrl) == 0)
-		mipi_freq = ctrl.value;
-
-	clk_termen = atomisp_csi2_configure_calc(coeff_clk_termen,
-						 mipi_freq, TERMEN_DEFAULT);
-	clk_settle = atomisp_csi2_configure_calc(coeff_clk_settle,
-						 mipi_freq, SETTLE_DEFAULT);
-	dat_termen = atomisp_csi2_configure_calc(coeff_dat_termen,
-						 mipi_freq, TERMEN_DEFAULT);
-	dat_settle = atomisp_csi2_configure_calc(coeff_dat_settle,
-						 mipi_freq, SETTLE_DEFAULT);
-	for (n = 0; n < csi2_port_lanes[port] + 1; n++) {
-		hrt_address base = csi2_port_base[port] + csi2_lane_base[n];
-		atomisp_store_uint32(base + CSI2_REG_RX_CSI_DLY_CNT_TERMEN,
-				     n == 0 ? clk_termen : dat_termen);
-		atomisp_store_uint32(base + CSI2_REG_RX_CSI_DLY_CNT_SETTLE,
-				     n == 0 ? clk_settle : dat_settle);
-	}
-}
-
-void atomisp_csi2_configure(struct atomisp_sub_device *asd)
-{
-	if (IS_HWREVISION(asd->isp, ATOMISP_HW_REVISION_ISP2401))
-		atomisp_csi2_configure_isp2401(asd);
-}
-
-/*
- * atomisp_mipi_csi2_cleanup - Routine for module driver cleanup
-*/
-void atomisp_mipi_csi2_cleanup(struct atomisp_device *isp)
-{
-}
-
-#ifndef ISP2401
-
-#endif
-int atomisp_mipi_csi2_init(struct atomisp_device *isp)
-{
-	struct atomisp_mipi_csi2_device *csi2_port;
-	unsigned int i;
-	int ret;
-
-	for (i = 0; i < ATOMISP_CAMERA_NR_PORTS; i++) {
-		csi2_port = &isp->csi2_port[i];
-		csi2_port->isp = isp;
-		ret = mipi_csi2_init_entities(csi2_port, i);
-		if (ret < 0)
-			goto fail;
-	}
-
-	return 0;
-
-fail:
-	atomisp_mipi_csi2_cleanup(isp);
-	return ret;
-}
-