drivers/video/fbdev/pmag-aa-fb.c - kernel/msm-4.9 - Gitiles

 /*
  *	linux/drivers/video/pmag-aa-fb.c
  *	Copyright 2002 Karsten Merker <merker@debian.org>
  *
  *	PMAG-AA TurboChannel framebuffer card support ... derived from
  *	pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by
  *	Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org>
  *	and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from
  *	"HP300 Topcat framebuffer support (derived from macfb of all things)
  *	Phil Blundell <philb@gnu.org> 1998"
  *	Copyright (c) 2016  Maciej W. Rozycki
  *
  *	This file is subject to the terms and conditions of the GNU General
  *	Public License.  See the file COPYING in the main directory of this
  *	archive for more details.
  *
  *	2002-09-28  Karsten Merker <merker@linuxtag.org>
  *		Version 0.01: First try to get a PMAG-AA running.
  *
  *	2003-02-24  Thiemo Seufer  <seufer@csv.ica.uni-stuttgart.de>
  *		Version 0.02: Major code cleanup.
  *
  *	2003-09-21  Thiemo Seufer  <seufer@csv.ica.uni-stuttgart.de>
  *		Hardware cursor support.
  *
  *	2016-02-21  Maciej W. Rozycki  <macro@linux-mips.org>
  *		Version 0.03: Rewritten for the new FB and TC APIs.
  */

 #include <linux/compiler.h>
 #include <linux/errno.h>
 #include <linux/fb.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/tc.h>
 #include <linux/timer.h>

 #include "bt455.h"
 #include "bt431.h"

 /* Version information */
 #define DRIVER_VERSION "0.03"
 #define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>"
 #define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver"

 /*
  * Bt455 RAM DAC register base offset (rel. to TC slot base address).
  */
 #define PMAG_AA_BT455_OFFSET		0x100000

 /*
  * Bt431 cursor generator offset (rel. to TC slot base address).
  */
 #define PMAG_AA_BT431_OFFSET		0x180000

 /*
  * Begin of PMAG-AA framebuffer memory relative to TC slot address,
  * resolution is 1280x1024x1 (8 bits deep, but only LSB is used).
  */
 #define PMAG_AA_ONBOARD_FBMEM_OFFSET	0x200000

 struct aafb_par {
 	void __iomem *mmio;
 	struct bt455_regs __iomem *bt455;
 	struct bt431_regs __iomem *bt431;
 };

 static struct fb_var_screeninfo aafb_defined = {
 	.xres		= 1280,
 	.yres		= 1024,
 	.xres_virtual	= 2048,
 	.yres_virtual	= 1024,
 	.bits_per_pixel	= 8,
 	.grayscale	= 1,
 	.red.length	= 0,
 	.green.length	= 1,
 	.blue.length	= 0,
 	.activate	= FB_ACTIVATE_NOW,
 	.accel_flags	= FB_ACCEL_NONE,
 	.pixclock	= 7645,
 	.left_margin	= 224,
 	.right_margin	= 32,
 	.upper_margin	= 33,
 	.lower_margin	= 3,
 	.hsync_len	= 160,
 	.vsync_len	= 3,
 	.sync		= FB_SYNC_ON_GREEN,
 	.vmode		= FB_VMODE_NONINTERLACED,
 };

 static struct fb_fix_screeninfo aafb_fix = {
 	.id		= "PMAG-AA",
 	.smem_len	= (2048 * 1024),
 	.type		= FB_TYPE_PACKED_PIXELS,
 	.visual		= FB_VISUAL_MONO10,
 	.ypanstep	= 1,
 	.ywrapstep	= 1,
 	.line_length	= 2048,
 	.mmio_len	= PMAG_AA_ONBOARD_FBMEM_OFFSET - PMAG_AA_BT455_OFFSET,
 };

 static int aafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 {
 	struct aafb_par *par = info->par;

 	if (cursor->image.height > BT431_CURSOR_SIZE ||
 	    cursor->image.width > BT431_CURSOR_SIZE) {
 		bt431_erase_cursor(par->bt431);
 		return -EINVAL;
 	}

 	if (!cursor->enable)
 		bt431_erase_cursor(par->bt431);

 	if (cursor->set & FB_CUR_SETPOS)
 		bt431_position_cursor(par->bt431,
 				      cursor->image.dx, cursor->image.dy);
 	if (cursor->set & FB_CUR_SETCMAP) {
 		u8 fg = cursor->image.fg_color ? 0xf : 0x0;
 		u8 bg = cursor->image.bg_color ? 0xf : 0x0;

 		bt455_write_cmap_entry(par->bt455, 8, bg);
 		bt455_write_cmap_next(par->bt455, bg);
 		bt455_write_ovly_next(par->bt455, fg);
 	}
 	if (cursor->set & (FB_CUR_SETSIZE | FB_CUR_SETSHAPE | FB_CUR_SETIMAGE))
 		bt431_set_cursor(par->bt431,
 				 cursor->image.data, cursor->mask, cursor->rop,
 				 cursor->image.width, cursor->image.height);

 	if (cursor->enable)
 		bt431_enable_cursor(par->bt431);

 	return 0;
 }

 /* 0 unblanks, any other blanks. */

 static int aafb_blank(int blank, struct fb_info *info)
 {
 	struct aafb_par *par = info->par;
 	u8 val = blank ? 0x00 : 0x0f;

 	bt455_write_cmap_entry(par->bt455, 1, val);
 	return 0;
 }

 static struct fb_ops aafb_ops = {
 	.owner		= THIS_MODULE,
 	.fb_blank	= aafb_blank,
 	.fb_fillrect	= cfb_fillrect,
 	.fb_copyarea	= cfb_copyarea,
 	.fb_imageblit	= cfb_imageblit,
 	.fb_cursor	= aafb_cursor,
 };

 static int pmagaafb_probe(struct device *dev)
 {
 	struct tc_dev *tdev = to_tc_dev(dev);
 	resource_size_t start, len;
 	struct fb_info *info;
 	struct aafb_par *par;
 	int err;

 	info = framebuffer_alloc(sizeof(struct aafb_par), dev);
 	if (!info) {
 		printk(KERN_ERR "%s: Cannot allocate memory\n", dev_name(dev));
 		return -ENOMEM;
 	}

 	par = info->par;
 	dev_set_drvdata(dev, info);

 	info->fbops = &aafb_ops;
 	info->fix = aafb_fix;
 	info->var = aafb_defined;
 	info->flags = FBINFO_DEFAULT;

 	/* Request the I/O MEM resource. */
 	start = tdev->resource.start;
 	len = tdev->resource.end - start + 1;
 	if (!request_mem_region(start, len, dev_name(dev))) {
 		printk(KERN_ERR "%s: Cannot reserve FB region\n",
 		       dev_name(dev));
 		err = -EBUSY;
 		goto err_alloc;
 	}

 	/* MMIO mapping setup. */
 	info->fix.mmio_start = start + PMAG_AA_BT455_OFFSET;
 	par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
 	if (!par->mmio) {
 		printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev));
 		err = -ENOMEM;
 		goto err_resource;
 	}
 	par->bt455 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT455_OFFSET;
 	par->bt431 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT431_OFFSET;

 	/* Frame buffer mapping setup. */
 	info->fix.smem_start = start + PMAG_AA_ONBOARD_FBMEM_OFFSET;
 	info->screen_base = ioremap_nocache(info->fix.smem_start,
 					    info->fix.smem_len);
 	if (!info->screen_base) {
 		printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev));
 		err = -ENOMEM;
 		goto err_mmio_map;
 	}
 	info->screen_size = info->fix.smem_len;

 	/* Init colormap. */
 	bt455_write_cmap_entry(par->bt455, 0, 0x0);
 	bt455_write_cmap_next(par->bt455, 0xf);

 	/* Init hardware cursor. */
 	bt431_erase_cursor(par->bt431);
 	bt431_init_cursor(par->bt431);

 	err = register_framebuffer(info);
 	if (err < 0) {
 		printk(KERN_ERR "%s: Cannot register framebuffer\n",
 		       dev_name(dev));
 		goto err_smem_map;
 	}

 	get_device(dev);

 	pr_info("fb%d: %s frame buffer device at %s\n",
 		info->node, info->fix.id, dev_name(dev));

 	return 0;


 err_smem_map:
 	iounmap(info->screen_base);

 err_mmio_map:
 	iounmap(par->mmio);

 err_resource:
 	release_mem_region(start, len);

 err_alloc:
 	framebuffer_release(info);
 	return err;
 }

 static int __exit pmagaafb_remove(struct device *dev)
 {
 	struct tc_dev *tdev = to_tc_dev(dev);
 	struct fb_info *info = dev_get_drvdata(dev);
 	struct aafb_par *par = info->par;
 	resource_size_t start, len;

 	put_device(dev);
 	unregister_framebuffer(info);
 	iounmap(info->screen_base);
 	iounmap(par->mmio);
 	start = tdev->resource.start;
 	len = tdev->resource.end - start + 1;
 	release_mem_region(start, len);
 	framebuffer_release(info);
 	return 0;
 }

 /*
  * Initialise the framebuffer.
  */
 static const struct tc_device_id pmagaafb_tc_table[] = {
 	{ "DEC     ", "PMAG-AA " },
 	{ }
 };
 MODULE_DEVICE_TABLE(tc, pmagaafb_tc_table);

 static struct tc_driver pmagaafb_driver = {
 	.id_table	= pmagaafb_tc_table,
 	.driver		= {
 		.name	= "pmagaafb",
 		.bus	= &tc_bus_type,
 		.probe	= pmagaafb_probe,
 		.remove	= __exit_p(pmagaafb_remove),
 	},
 };

 static int __init pmagaafb_init(void)
 {
 #ifndef MODULE
 	if (fb_get_options("pmagaafb", NULL))
 		return -ENXIO;
 #endif
 	return tc_register_driver(&pmagaafb_driver);
 }

 static void __exit pmagaafb_exit(void)
 {
 	tc_unregister_driver(&pmagaafb_driver);
 }

 module_init(pmagaafb_init);
 module_exit(pmagaafb_exit);

 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
 MODULE_LICENSE("GPL");
	/*
	* linux/drivers/video/pmag-aa-fb.c
	* Copyright 2002 Karsten Merker <merker@debian.org>
	*
	* PMAG-AA TurboChannel framebuffer card support ... derived from
	* pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by
	* Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org>
	* and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from
	* "HP300 Topcat framebuffer support (derived from macfb of all things)
	* Phil Blundell <philb@gnu.org> 1998"
	* Copyright (c) 2016 Maciej W. Rozycki
	*
	* This file is subject to the terms and conditions of the GNU General
	* Public License. See the file COPYING in the main directory of this
	* archive for more details.
	*
	* 2002-09-28 Karsten Merker <merker@linuxtag.org>
	* Version 0.01: First try to get a PMAG-AA running.
	*
	* 2003-02-24 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
	* Version 0.02: Major code cleanup.
	*
	* 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
	* Hardware cursor support.
	*
	* 2016-02-21 Maciej W. Rozycki <macro@linux-mips.org>
	* Version 0.03: Rewritten for the new FB and TC APIs.
	*/

	#include <linux/compiler.h>
	#include <linux/errno.h>
	#include <linux/fb.h>
	#include <linux/init.h>
	#include <linux/io.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/tc.h>
	#include <linux/timer.h>

	#include "bt455.h"
	#include "bt431.h"

	/* Version information */
	#define DRIVER_VERSION "0.03"
	#define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>"
	#define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver"

	/*
	* Bt455 RAM DAC register base offset (rel. to TC slot base address).
	*/
	#define PMAG_AA_BT455_OFFSET 0x100000

	/*
	* Bt431 cursor generator offset (rel. to TC slot base address).
	*/
	#define PMAG_AA_BT431_OFFSET 0x180000

	/*
	* Begin of PMAG-AA framebuffer memory relative to TC slot address,
	* resolution is 1280x1024x1 (8 bits deep, but only LSB is used).
	*/
	#define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000

	struct aafb_par {
	void __iomem *mmio;
	struct bt455_regs __iomem *bt455;
	struct bt431_regs __iomem *bt431;
	};

	static struct fb_var_screeninfo aafb_defined = {
	.xres = 1280,
	.yres = 1024,
	.xres_virtual = 2048,
	.yres_virtual = 1024,
	.bits_per_pixel = 8,
	.grayscale = 1,
	.red.length = 0,
	.green.length = 1,
	.blue.length = 0,
	.activate = FB_ACTIVATE_NOW,
	.accel_flags = FB_ACCEL_NONE,
	.pixclock = 7645,
	.left_margin = 224,
	.right_margin = 32,
	.upper_margin = 33,
	.lower_margin = 3,
	.hsync_len = 160,
	.vsync_len = 3,
	.sync = FB_SYNC_ON_GREEN,
	.vmode = FB_VMODE_NONINTERLACED,
	};

	static struct fb_fix_screeninfo aafb_fix = {
	.id = "PMAG-AA",
	.smem_len = (2048 * 1024),
	.type = FB_TYPE_PACKED_PIXELS,
	.visual = FB_VISUAL_MONO10,
	.ypanstep = 1,
	.ywrapstep = 1,
	.line_length = 2048,
	.mmio_len = PMAG_AA_ONBOARD_FBMEM_OFFSET - PMAG_AA_BT455_OFFSET,
	};

	static int aafb_cursor(struct fb_info info, struct fb_cursor cursor)
	{
	struct aafb_par *par = info->par;

	if (cursor->image.height > BT431_CURSOR_SIZE \|\|
	cursor->image.width > BT431_CURSOR_SIZE) {
	bt431_erase_cursor(par->bt431);
	return -EINVAL;
	}

	if (!cursor->enable)
	bt431_erase_cursor(par->bt431);

	if (cursor->set & FB_CUR_SETPOS)
	bt431_position_cursor(par->bt431,
	cursor->image.dx, cursor->image.dy);
	if (cursor->set & FB_CUR_SETCMAP) {
	u8 fg = cursor->image.fg_color ? 0xf : 0x0;
	u8 bg = cursor->image.bg_color ? 0xf : 0x0;

	bt455_write_cmap_entry(par->bt455, 8, bg);
	bt455_write_cmap_next(par->bt455, bg);
	bt455_write_ovly_next(par->bt455, fg);
	}
	if (cursor->set & (FB_CUR_SETSIZE \| FB_CUR_SETSHAPE \| FB_CUR_SETIMAGE))
	bt431_set_cursor(par->bt431,
	cursor->image.data, cursor->mask, cursor->rop,
	cursor->image.width, cursor->image.height);

	if (cursor->enable)
	bt431_enable_cursor(par->bt431);

	return 0;
	}

	/* 0 unblanks, any other blanks. */

	static int aafb_blank(int blank, struct fb_info *info)
	{
	struct aafb_par *par = info->par;
	u8 val = blank ? 0x00 : 0x0f;

	bt455_write_cmap_entry(par->bt455, 1, val);
	return 0;
	}

	static struct fb_ops aafb_ops = {
	.owner = THIS_MODULE,
	.fb_blank = aafb_blank,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_cursor = aafb_cursor,
	};

	static int pmagaafb_probe(struct device *dev)
	{
	struct tc_dev *tdev = to_tc_dev(dev);
	resource_size_t start, len;
	struct fb_info *info;
	struct aafb_par *par;
	int err;

	info = framebuffer_alloc(sizeof(struct aafb_par), dev);
	if (!info) {
	printk(KERN_ERR "%s: Cannot allocate memory\n", dev_name(dev));
	return -ENOMEM;
	}

	par = info->par;
	dev_set_drvdata(dev, info);

	info->fbops = &aafb_ops;
	info->fix = aafb_fix;
	info->var = aafb_defined;
	info->flags = FBINFO_DEFAULT;

	/* Request the I/O MEM resource. */
	start = tdev->resource.start;
	len = tdev->resource.end - start + 1;
	if (!request_mem_region(start, len, dev_name(dev))) {
	printk(KERN_ERR "%s: Cannot reserve FB region\n",
	dev_name(dev));
	err = -EBUSY;
	goto err_alloc;
	}

	/* MMIO mapping setup. */
	info->fix.mmio_start = start + PMAG_AA_BT455_OFFSET;
	par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
	if (!par->mmio) {
	printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev));
	err = -ENOMEM;
	goto err_resource;
	}
	par->bt455 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT455_OFFSET;
	par->bt431 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT431_OFFSET;

	/* Frame buffer mapping setup. */
	info->fix.smem_start = start + PMAG_AA_ONBOARD_FBMEM_OFFSET;
	info->screen_base = ioremap_nocache(info->fix.smem_start,
	info->fix.smem_len);
	if (!info->screen_base) {
	printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev));
	err = -ENOMEM;
	goto err_mmio_map;
	}
	info->screen_size = info->fix.smem_len;

	/* Init colormap. */
	bt455_write_cmap_entry(par->bt455, 0, 0x0);
	bt455_write_cmap_next(par->bt455, 0xf);

	/* Init hardware cursor. */
	bt431_erase_cursor(par->bt431);
	bt431_init_cursor(par->bt431);

	err = register_framebuffer(info);
	if (err < 0) {
	printk(KERN_ERR "%s: Cannot register framebuffer\n",
	dev_name(dev));
	goto err_smem_map;
	}

	get_device(dev);

	pr_info("fb%d: %s frame buffer device at %s\n",
	info->node, info->fix.id, dev_name(dev));

	return 0;


	err_smem_map:
	iounmap(info->screen_base);

	err_mmio_map:
	iounmap(par->mmio);

	err_resource:
	release_mem_region(start, len);

	err_alloc:
	framebuffer_release(info);
	return err;
	}

	static int __exit pmagaafb_remove(struct device *dev)
	{
	struct tc_dev *tdev = to_tc_dev(dev);
	struct fb_info *info = dev_get_drvdata(dev);
	struct aafb_par *par = info->par;
	resource_size_t start, len;

	put_device(dev);
	unregister_framebuffer(info);
	iounmap(info->screen_base);
	iounmap(par->mmio);
	start = tdev->resource.start;
	len = tdev->resource.end - start + 1;
	release_mem_region(start, len);
	framebuffer_release(info);
	return 0;
	}

	/*
	* Initialise the framebuffer.
	*/
	static const struct tc_device_id pmagaafb_tc_table[] = {
	{ "DEC ", "PMAG-AA " },
	{ }
	};
	MODULE_DEVICE_TABLE(tc, pmagaafb_tc_table);

	static struct tc_driver pmagaafb_driver = {
	.id_table = pmagaafb_tc_table,
	.driver = {
	.name = "pmagaafb",
	.bus = &tc_bus_type,
	.probe = pmagaafb_probe,
	.remove = __exit_p(pmagaafb_remove),
	},
	};

	static int __init pmagaafb_init(void)
	{
	#ifndef MODULE
	if (fb_get_options("pmagaafb", NULL))
	return -ENXIO;
	#endif
	return tc_register_driver(&pmagaafb_driver);
	}

	static void __exit pmagaafb_exit(void)
	{
	tc_unregister_driver(&pmagaafb_driver);
	}

	module_init(pmagaafb_init);
	module_exit(pmagaafb_exit);

	MODULE_AUTHOR(DRIVER_AUTHOR);
	MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
	MODULE_LICENSE("GPL");