Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 603 insertions, 0 deletions

diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c
new file mode 100644
index 000000000..519313b8b
--- /dev/null
+++ b/drivers/video/fbdev/au1100fb.c
@@ -0,0 +1,603 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ *	Au1100 LCD Driver.
+ *
+ * Rewritten for 2.6 by Embedded Alley Solutions
+ * 	<source@embeddedalley.com>, based on submissions by
+ *  	Karl Lessard <klessard@sunrisetelecom.com>
+ *  	<c.pellegrin@exadron.com>
+ *
+ * PM support added by Rodolfo Giometti <giometti@linux.it>
+ * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
+ *
+ * Copyright 2002 MontaVista Software
+ * Author: MontaVista Software, Inc.
+ *		ppopov@mvista.com or source@mvista.com
+ *
+ * Copyright 2002 Alchemy Semiconductor
+ * Author: Alchemy Semiconductor
+ *
+ * Based on:
+ * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
+ *  Created 28 Dec 1997 by Geert Uytterhoeven
+ *
+ *  This program is free software; you can redistribute	 it and/or modify it
+ *  under  the terms of	 the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the	License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED	  ``AS	IS'' AND   ANY	EXPRESS OR IMPLIED
+ *  WARRANTIES,	  INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO	EVENT  SHALL   THE AUTHOR  BE	 LIABLE FOR ANY	  DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED	  TO, PROCUREMENT OF  SUBSTITUTE GOODS	OR SERVICES; LOSS OF
+ *  USE, DATA,	OR PROFITS; OR	BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN	 CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ctype.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/mach-au1x00/au1000.h>
+
+#define DEBUG 0
+
+#include "au1100fb.h"
+
+#define DRIVER_NAME "au1100fb"
+#define DRIVER_DESC "LCD controller driver for AU1100 processors"
+
+#define to_au1100fb_device(_info) \
+	  (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
+
+/* Bitfields format supported by the controller. Note that the order of formats
+ * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
+ * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
+ */
+struct fb_bitfield rgb_bitfields[][4] =
+{
+  	/*     Red, 	   Green, 	 Blue, 	     Transp   */
+	{ { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
+	{ { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
+	{ { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
+	{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
+	{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
+
+	/* The last is used to describe 12bpp format */
+	{ { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
+};
+
+static struct fb_fix_screeninfo au1100fb_fix = {
+	.id		= "AU1100 FB",
+	.xpanstep 	= 1,
+	.ypanstep 	= 1,
+	.type		= FB_TYPE_PACKED_PIXELS,
+	.accel		= FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo au1100fb_var = {
+	.activate	= FB_ACTIVATE_NOW,
+	.height		= -1,
+	.width		= -1,
+	.vmode		= FB_VMODE_NONINTERLACED,
+};
+
+/* fb_blank
+ * Blank the screen. Depending on the mode, the screen will be
+ * activated with the backlight color, or desactivated
+ */
+static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
+{
+	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
+
+	print_dbg("fb_blank %d %p", blank_mode, fbi);
+
+	switch (blank_mode) {
+
+	case VESA_NO_BLANKING:
+		/* Turn on panel */
+		fbdev->regs->lcd_control |= LCD_CONTROL_GO;
+		wmb(); /* drain writebuffer */
+		break;
+
+	case VESA_VSYNC_SUSPEND:
+	case VESA_HSYNC_SUSPEND:
+	case VESA_POWERDOWN:
+		/* Turn off panel */
+		fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
+		wmb(); /* drain writebuffer */
+		break;
+	default:
+		break;
+
+	}
+	return 0;
+}
+
+/*
+ * Set hardware with var settings. This will enable the controller with a specific
+ * mode, normally validated with the fb_check_var method
+	 */
+int au1100fb_setmode(struct au1100fb_device *fbdev)
+{
+	struct fb_info *info = &fbdev->info;
+	u32 words;
+	int index;
+
+	if (!fbdev)
+		return -EINVAL;
+
+	/* Update var-dependent FB info */
+	if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
+		if (info->var.bits_per_pixel <= 8) {
+			/* palettized */
+			info->var.red.offset    = 0;
+			info->var.red.length    = info->var.bits_per_pixel;
+			info->var.red.msb_right = 0;
+
+			info->var.green.offset  = 0;
+			info->var.green.length  = info->var.bits_per_pixel;
+			info->var.green.msb_right = 0;
+
+			info->var.blue.offset   = 0;
+			info->var.blue.length   = info->var.bits_per_pixel;
+			info->var.blue.msb_right = 0;
+
+			info->var.transp.offset = 0;
+			info->var.transp.length = 0;
+			info->var.transp.msb_right = 0;
+
+			info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+			info->fix.line_length = info->var.xres_virtual /
+							(8/info->var.bits_per_pixel);
+		} else {
+			/* non-palettized */
+			index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
+			info->var.red = rgb_bitfields[index][0];
+			info->var.green = rgb_bitfields[index][1];
+			info->var.blue = rgb_bitfields[index][2];
+			info->var.transp = rgb_bitfields[index][3];
+
+			info->fix.visual = FB_VISUAL_TRUECOLOR;
+			info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
+		}
+	} else {
+		/* mono */
+		info->fix.visual = FB_VISUAL_MONO10;
+		info->fix.line_length = info->var.xres_virtual / 8;
+	}
+
+	info->screen_size = info->fix.line_length * info->var.yres_virtual;
+	info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
+				>> LCD_CONTROL_SM_BIT) * 90;
+
+	/* Determine BPP mode and format */
+	fbdev->regs->lcd_control = fbdev->panel->control_base;
+	fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
+	fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
+	fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
+	fbdev->regs->lcd_intenable = 0;
+	fbdev->regs->lcd_intstatus = 0;
+	fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
+
+	if (panel_is_dual(fbdev->panel)) {
+		/* Second panel display seconf half of screen if possible,
+		 * otherwise display the same as the first panel */
+		if (info->var.yres_virtual >= (info->var.yres << 1)) {
+			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
+							  (info->fix.line_length *
+						          (info->var.yres_virtual >> 1)));
+		} else {
+			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
+		}
+	}
+
+	words = info->fix.line_length / sizeof(u32);
+	if (!info->var.rotate || (info->var.rotate == 180)) {
+		words *= info->var.yres_virtual;
+		if (info->var.rotate /* 180 */) {
+			words -= (words % 8); /* should be divisable by 8 */
+		}
+	}
+	fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
+
+	fbdev->regs->lcd_pwmdiv = 0;
+	fbdev->regs->lcd_pwmhi = 0;
+
+	/* Resume controller */
+	fbdev->regs->lcd_control |= LCD_CONTROL_GO;
+	mdelay(10);
+	au1100fb_fb_blank(VESA_NO_BLANKING, info);
+
+	return 0;
+}
+
+/* fb_setcolreg
+ * Set color in LCD palette.
+ */
+int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
+{
+	struct au1100fb_device *fbdev;
+	u32 *palette;
+	u32 value;
+
+	fbdev = to_au1100fb_device(fbi);
+	palette = fbdev->regs->lcd_palettebase;
+
+	if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
+		return -EINVAL;
+
+	if (fbi->var.grayscale) {
+		/* Convert color to grayscale */
+		red = green = blue =
+			(19595 * red + 38470 * green + 7471 * blue) >> 16;
+	}
+
+	if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
+		/* Place color in the pseudopalette */
+		if (regno > 16)
+			return -EINVAL;
+
+		palette = (u32*)fbi->pseudo_palette;
+
+		red   >>= (16 - fbi->var.red.length);
+		green >>= (16 - fbi->var.green.length);
+		blue  >>= (16 - fbi->var.blue.length);
+
+		value = (red   << fbi->var.red.offset) 	|
+			(green << fbi->var.green.offset)|
+			(blue  << fbi->var.blue.offset);
+		value &= 0xFFFF;
+
+	} else if (panel_is_active(fbdev->panel)) {
+		/* COLOR TFT PALLETTIZED (use RGB 565) */
+		value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
+		value &= 0xFFFF;
+
+	} else if (panel_is_color(fbdev->panel)) {
+		/* COLOR STN MODE */
+		value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
+			((green >> 8) & 0x00F0) |
+			(((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
+		value &= 0xFFF;
+	} else {
+		/* MONOCHROME MODE */
+		value = (green >> 12) & 0x000F;
+		value &= 0xF;
+	}
+
+	palette[regno] = value;
+
+	return 0;
+}
+
+/* fb_pan_display
+ * Pan display in x and/or y as specified
+ */
+int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
+{
+	struct au1100fb_device *fbdev;
+	int dy;
+
+	fbdev = to_au1100fb_device(fbi);
+
+	print_dbg("fb_pan_display %p %p", var, fbi);
+
+	if (!var || !fbdev) {
+		return -EINVAL;
+	}
+
+	if (var->xoffset - fbi->var.xoffset) {
+		/* No support for X panning for now! */
+		return -EINVAL;
+	}
+
+	print_dbg("fb_pan_display 2 %p %p", var, fbi);
+	dy = var->yoffset - fbi->var.yoffset;
+	if (dy) {
+
+		u32 dmaaddr;
+
+		print_dbg("Panning screen of %d lines", dy);
+
+		dmaaddr = fbdev->regs->lcd_dmaaddr0;
+		dmaaddr += (fbi->fix.line_length * dy);
+
+		/* TODO: Wait for current frame to finished */
+		fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
+
+		if (panel_is_dual(fbdev->panel)) {
+			dmaaddr = fbdev->regs->lcd_dmaaddr1;
+			dmaaddr += (fbi->fix.line_length * dy);
+			fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
+	}
+	}
+	print_dbg("fb_pan_display 3 %p %p", var, fbi);
+
+	return 0;
+}
+
+/* fb_mmap
+ * Map video memory in user space. We don't use the generic fb_mmap method mainly
+ * to allow the use of the TLB streaming flag (CCA=6)
+ */
+int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
+{
+	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
+
+	pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
+
+	return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys,
+			fbdev->fb_len);
+}
+
+static const struct fb_ops au1100fb_ops =
+{
+	.owner			= THIS_MODULE,
+	.fb_setcolreg		= au1100fb_fb_setcolreg,
+	.fb_blank		= au1100fb_fb_blank,
+	.fb_pan_display		= au1100fb_fb_pan_display,
+	.fb_fillrect		= cfb_fillrect,
+	.fb_copyarea		= cfb_copyarea,
+	.fb_imageblit		= cfb_imageblit,
+	.fb_mmap		= au1100fb_fb_mmap,
+};
+
+
+/*-------------------------------------------------------------------------*/
+
+static int au1100fb_setup(struct au1100fb_device *fbdev)
+{
+	char *this_opt, *options;
+	int num_panels = ARRAY_SIZE(known_lcd_panels);
+
+	if (num_panels <= 0) {
+		print_err("No LCD panels supported by driver!");
+		return -ENODEV;
+	}
+
+	if (fb_get_options(DRIVER_NAME, &options))
+		return -ENODEV;
+	if (!options)
+		return -ENODEV;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		/* Panel option */
+		if (!strncmp(this_opt, "panel:", 6)) {
+			int i;
+			this_opt += 6;
+			for (i = 0; i < num_panels; i++) {
+				if (!strncmp(this_opt, known_lcd_panels[i].name,
+					     strlen(this_opt))) {
+					fbdev->panel = &known_lcd_panels[i];
+					fbdev->panel_idx = i;
+					break;
+				}
+			}
+			if (i >= num_panels) {
+				print_warn("Panel '%s' not supported!", this_opt);
+				return -ENODEV;
+			}
+		}
+		/* Unsupported option */
+		else
+			print_warn("Unsupported option \"%s\"", this_opt);
+	}
+
+	print_info("Panel=%s", fbdev->panel->name);
+
+	return 0;
+}
+
+static int au1100fb_drv_probe(struct platform_device *dev)
+{
+	struct au1100fb_device *fbdev;
+	struct resource *regs_res;
+	struct clk *c;
+
+	/* Allocate new device private */
+	fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL);
+	if (!fbdev)
+		return -ENOMEM;
+
+	if (au1100fb_setup(fbdev))
+		goto failed;
+
+	platform_set_drvdata(dev, (void *)fbdev);
+	fbdev->dev = &dev->dev;
+
+	/* Allocate region for our registers and map them */
+	regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!regs_res) {
+		print_err("fail to retrieve registers resource");
+		return -EFAULT;
+	}
+
+	au1100fb_fix.mmio_start = regs_res->start;
+	au1100fb_fix.mmio_len = resource_size(regs_res);
+
+	if (!devm_request_mem_region(&dev->dev,
+				     au1100fb_fix.mmio_start,
+				     au1100fb_fix.mmio_len,
+				     DRIVER_NAME)) {
+		print_err("fail to lock memory region at 0x%08lx",
+				au1100fb_fix.mmio_start);
+		return -EBUSY;
+	}
+
+	fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
+
+	print_dbg("Register memory map at %p", fbdev->regs);
+	print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
+
+	c = clk_get(NULL, "lcd_intclk");
+	if (!IS_ERR(c)) {
+		fbdev->lcdclk = c;
+		clk_set_rate(c, 48000000);
+		clk_prepare_enable(c);
+	}
+
+	/* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
+	fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
+		  	(fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
+
+	fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
+					    PAGE_ALIGN(fbdev->fb_len),
+					    &fbdev->fb_phys, GFP_KERNEL);
+	if (!fbdev->fb_mem) {
+		print_err("fail to allocate framebuffer (size: %dK))",
+			  fbdev->fb_len / 1024);
+		return -ENOMEM;
+	}
+
+	au1100fb_fix.smem_start = fbdev->fb_phys;
+	au1100fb_fix.smem_len = fbdev->fb_len;
+
+	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
+	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
+
+	/* load the panel info into the var struct */
+	au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
+	au1100fb_var.xres = fbdev->panel->xres;
+	au1100fb_var.xres_virtual = au1100fb_var.xres;
+	au1100fb_var.yres = fbdev->panel->yres;
+	au1100fb_var.yres_virtual = au1100fb_var.yres;
+
+	fbdev->info.screen_base = fbdev->fb_mem;
+	fbdev->info.fbops = &au1100fb_ops;
+	fbdev->info.fix = au1100fb_fix;
+
+	fbdev->info.pseudo_palette =
+		devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL);
+	if (!fbdev->info.pseudo_palette)
+		return -ENOMEM;
+
+	if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
+		print_err("Fail to allocate colormap (%d entries)",
+			   AU1100_LCD_NBR_PALETTE_ENTRIES);
+		return -EFAULT;
+	}
+
+	fbdev->info.var = au1100fb_var;
+
+	/* Set h/w registers */
+	au1100fb_setmode(fbdev);
+
+	/* Register new framebuffer */
+	if (register_framebuffer(&fbdev->info) < 0) {
+		print_err("cannot register new framebuffer");
+		goto failed;
+	}
+
+	return 0;
+
+failed:
+	if (fbdev->lcdclk) {
+		clk_disable_unprepare(fbdev->lcdclk);
+		clk_put(fbdev->lcdclk);
+	}
+	if (fbdev->info.cmap.len != 0) {
+		fb_dealloc_cmap(&fbdev->info.cmap);
+	}
+
+	return -ENODEV;
+}
+
+int au1100fb_drv_remove(struct platform_device *dev)
+{
+	struct au1100fb_device *fbdev = NULL;
+
+	if (!dev)
+		return -ENODEV;
+
+	fbdev = platform_get_drvdata(dev);
+
+#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
+	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
+#endif
+	fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
+
+	/* Clean up all probe data */
+	unregister_framebuffer(&fbdev->info);
+
+	fb_dealloc_cmap(&fbdev->info.cmap);
+
+	if (fbdev->lcdclk) {
+		clk_disable_unprepare(fbdev->lcdclk);
+		clk_put(fbdev->lcdclk);
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static struct au1100fb_regs fbregs;
+
+int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct au1100fb_device *fbdev = platform_get_drvdata(dev);
+
+	if (!fbdev)
+		return 0;
+
+	/* Blank the LCD */
+	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
+
+	clk_disable(fbdev->lcdclk);
+
+	memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
+
+	return 0;
+}
+
+int au1100fb_drv_resume(struct platform_device *dev)
+{
+	struct au1100fb_device *fbdev = platform_get_drvdata(dev);
+
+	if (!fbdev)
+		return 0;
+
+	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
+
+	clk_enable(fbdev->lcdclk);
+
+	/* Unblank the LCD */
+	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
+
+	return 0;
+}
+#else
+#define au1100fb_drv_suspend NULL
+#define au1100fb_drv_resume NULL
+#endif
+
+static struct platform_driver au1100fb_driver = {
+	.driver = {
+		.name		= "au1100-lcd",
+	},
+	.probe		= au1100fb_drv_probe,
+        .remove		= au1100fb_drv_remove,
+	.suspend	= au1100fb_drv_suspend,
+        .resume		= au1100fb_drv_resume,
+};
+module_platform_driver(au1100fb_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");