X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fvideo%2Ffbdev%2Fau1100fb.c;fp=kernel%2Fdrivers%2Fvideo%2Ffbdev%2Fau1100fb.c;h=59560189b24aeeebcc674b337050715869e5bf49;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/video/fbdev/au1100fb.c b/kernel/drivers/video/fbdev/au1100fb.c new file mode 100644 index 000000000..59560189b --- /dev/null +++ b/kernel/drivers/video/fbdev/au1100fb.c @@ -0,0 +1,650 @@ +/* + * BRIEF MODULE DESCRIPTION + * Au1100 LCD Driver. + * + * Rewritten for 2.6 by Embedded Alley Solutions + * , based on submissions by + * Karl Lessard + * + * + * PM support added by Rodolfo Giometti + * Cursor enable/disable by Rodolfo Giometti + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#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_rotate + * Rotate the display of this angle. This doesn't seems to be used by the core, + * but as our hardware supports it, so why not implementing it... + */ +void au1100fb_fb_rotate(struct fb_info *fbi, int angle) +{ + struct au1100fb_device *fbdev = to_au1100fb_device(fbi); + + print_dbg("fb_rotate %p %d", fbi, angle); + + if (fbdev && (angle > 0) && !(angle % 90)) { + + fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; + + fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK); + fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT); + + fbdev->regs->lcd_control |= LCD_CONTROL_GO; + } +} + +/* 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; + + fbdev = to_au1100fb_device(fbi); + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 + + return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len); +} + +static 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_rotate = au1100fb_fb_rotate, + .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 = NULL; + struct resource *regs_res; + unsigned long page; + struct clk *c; + + /* Allocate new device private */ + fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device), + GFP_KERNEL); + if (!fbdev) { + print_err("fail to allocate device private record"); + return -ENOMEM; + } + + if (au1100fb_setup(fbdev)) + goto failed; + + platform_set_drvdata(dev, (void *)fbdev); + + /* 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 frambuffer (size: %dK))", + fbdev->fb_len / 1024); + return -ENOMEM; + } + + au1100fb_fix.smem_start = fbdev->fb_phys; + au1100fb_fix.smem_len = fbdev->fb_len; + + /* + * Set page reserved so that mmap will work. This is necessary + * since we'll be remapping normal memory. + */ + for (page = (unsigned long)fbdev->fb_mem; + page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len); + page += PAGE_SIZE) { +#ifdef CONFIG_DMA_NONCOHERENT + SetPageReserved(virt_to_page(CAC_ADDR((void *)page))); +#else + SetPageReserved(virt_to_page(page)); +#endif + } + + 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_kzalloc(&dev->dev, sizeof(u32) * 16, 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->fb_mem) { + dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem, + fbdev->fb_phys); + } + 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");