summaryrefslogtreecommitdiffstats
path: root/drivers/video/fbdev/au1100fb.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--drivers/video/fbdev/au1100fb.c605
1 files changed, 605 insertions, 0 deletions
diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c
new file mode 100644
index 000000000..37a6512fe
--- /dev/null
+++ b/drivers/video/fbdev/au1100fb.c
@@ -0,0 +1,605 @@
+/*
+ * 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_pallettebase;
+
+ 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);
+
+ if (fbdev->lcdclk)
+ 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));
+
+ if (fbdev->lcdclk)
+ 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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 03:49:55 +0000