diff options
Diffstat (limited to 'drivers/video/xilinxfb.c')
| -rw-r--r-- | drivers/video/xilinxfb.c | 518 |
1 files changed, 0 insertions, 518 deletions
diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c deleted file mode 100644 index af0b4fdf9aa..00000000000 --- a/drivers/video/xilinxfb.c +++ /dev/null @@ -1,518 +0,0 @@ -/* - * Xilinx TFT frame buffer driver - * - * Author: MontaVista Software, Inc. - * source@mvista.com - * - * 2002-2007 (c) MontaVista Software, Inc. - * 2007 (c) Secret Lab Technologies, Ltd. - * 2009 (c) Xilinx Inc. - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. - */ - -/* - * This driver was based on au1100fb.c by MontaVista rewritten for 2.6 - * by Embedded Alley Solutions <source@embeddedalley.com>, which in turn - * was based on skeletonfb.c, Skeleton for a frame buffer device by - * Geert Uytterhoeven. - */ - -#include <linux/device.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/dma-mapping.h> -#include <linux/of_device.h> -#include <linux/of_platform.h> -#include <linux/of_address.h> -#include <linux/io.h> -#include <linux/xilinxfb.h> -#include <linux/slab.h> - -#ifdef CONFIG_PPC_DCR -#include <asm/dcr.h> -#endif - -#define DRIVER_NAME "xilinxfb" - - -/* - * Xilinx calls it "PLB TFT LCD Controller" though it can also be used for - * the VGA port on the Xilinx ML40x board. This is a hardware display - * controller for a 640x480 resolution TFT or VGA screen. - * - * The interface to the framebuffer is nice and simple. There are two - * control registers. The first tells the LCD interface where in memory - * the frame buffer is (only the 11 most significant bits are used, so - * don't start thinking about scrolling). The second allows the LCD to - * be turned on or off as well as rotated 180 degrees. - * - * In case of direct PLB access the second control register will be at - * an offset of 4 as compared to the DCR access where the offset is 1 - * i.e. REG_CTRL. So this is taken care in the function - * xilinx_fb_out_be32 where it left shifts the offset 2 times in case of - * direct PLB access. - */ -#define NUM_REGS 2 -#define REG_FB_ADDR 0 -#define REG_CTRL 1 -#define REG_CTRL_ENABLE 0x0001 -#define REG_CTRL_ROTATE 0x0002 - -/* - * The hardware only handles a single mode: 640x480 24 bit true - * color. Each pixel gets a word (32 bits) of memory. Within each word, - * the 8 most significant bits are ignored, the next 8 bits are the red - * level, the next 8 bits are the green level and the 8 least - * significant bits are the blue level. Each row of the LCD uses 1024 - * words, but only the first 640 pixels are displayed with the other 384 - * words being ignored. There are 480 rows. - */ -#define BYTES_PER_PIXEL 4 -#define BITS_PER_PIXEL (BYTES_PER_PIXEL * 8) - -#define RED_SHIFT 16 -#define GREEN_SHIFT 8 -#define BLUE_SHIFT 0 - -#define PALETTE_ENTRIES_NO 16 /* passed to fb_alloc_cmap() */ - -/* - * Default xilinxfb configuration - */ -static struct xilinxfb_platform_data xilinx_fb_default_pdata = { - .xres = 640, - .yres = 480, - .xvirt = 1024, - .yvirt = 480, -}; - -/* - * Here are the default fb_fix_screeninfo and fb_var_screeninfo structures - */ -static struct fb_fix_screeninfo xilinx_fb_fix = { - .id = "Xilinx", - .type = FB_TYPE_PACKED_PIXELS, - .visual = FB_VISUAL_TRUECOLOR, - .accel = FB_ACCEL_NONE -}; - -static struct fb_var_screeninfo xilinx_fb_var = { - .bits_per_pixel = BITS_PER_PIXEL, - - .red = { RED_SHIFT, 8, 0 }, - .green = { GREEN_SHIFT, 8, 0 }, - .blue = { BLUE_SHIFT, 8, 0 }, - .transp = { 0, 0, 0 }, - - .activate = FB_ACTIVATE_NOW -}; - - -#define PLB_ACCESS_FLAG 0x1 /* 1 = PLB, 0 = DCR */ - -struct xilinxfb_drvdata { - - struct fb_info info; /* FB driver info record */ - - phys_addr_t regs_phys; /* phys. address of the control - registers */ - void __iomem *regs; /* virt. address of the control - registers */ -#ifdef CONFIG_PPC_DCR - dcr_host_t dcr_host; - unsigned int dcr_len; -#endif - void *fb_virt; /* virt. address of the frame buffer */ - dma_addr_t fb_phys; /* phys. address of the frame buffer */ - int fb_alloced; /* Flag, was the fb memory alloced? */ - - u8 flags; /* features of the driver */ - - u32 reg_ctrl_default; - - u32 pseudo_palette[PALETTE_ENTRIES_NO]; - /* Fake palette of 16 colors */ -}; - -#define to_xilinxfb_drvdata(_info) \ - container_of(_info, struct xilinxfb_drvdata, info) - -/* - * The XPS TFT Controller can be accessed through PLB or DCR interface. - * To perform the read/write on the registers we need to check on - * which bus its connected and call the appropriate write API. - */ -static void xilinx_fb_out_be32(struct xilinxfb_drvdata *drvdata, u32 offset, - u32 val) -{ - if (drvdata->flags & PLB_ACCESS_FLAG) - out_be32(drvdata->regs + (offset << 2), val); -#ifdef CONFIG_PPC_DCR - else - dcr_write(drvdata->dcr_host, offset, val); -#endif -} - -static int -xilinx_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, - unsigned transp, struct fb_info *fbi) -{ - u32 *palette = fbi->pseudo_palette; - - if (regno >= PALETTE_ENTRIES_NO) - return -EINVAL; - - if (fbi->var.grayscale) { - /* Convert color to grayscale. - * grayscale = 0.30*R + 0.59*G + 0.11*B */ - red = green = blue = - (red * 77 + green * 151 + blue * 28 + 127) >> 8; - } - - /* fbi->fix.visual is always FB_VISUAL_TRUECOLOR */ - - /* We only handle 8 bits of each color. */ - red >>= 8; - green >>= 8; - blue >>= 8; - palette[regno] = (red << RED_SHIFT) | (green << GREEN_SHIFT) | - (blue << BLUE_SHIFT); - - return 0; -} - -static int -xilinx_fb_blank(int blank_mode, struct fb_info *fbi) -{ - struct xilinxfb_drvdata *drvdata = to_xilinxfb_drvdata(fbi); - - switch (blank_mode) { - case FB_BLANK_UNBLANK: - /* turn on panel */ - xilinx_fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default); - break; - - case FB_BLANK_NORMAL: - case FB_BLANK_VSYNC_SUSPEND: - case FB_BLANK_HSYNC_SUSPEND: - case FB_BLANK_POWERDOWN: - /* turn off panel */ - xilinx_fb_out_be32(drvdata, REG_CTRL, 0); - default: - break; - - } - return 0; /* success */ -} - -static struct fb_ops xilinxfb_ops = -{ - .owner = THIS_MODULE, - .fb_setcolreg = xilinx_fb_setcolreg, - .fb_blank = xilinx_fb_blank, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - -/* --------------------------------------------------------------------- - * Bus independent setup/teardown - */ - -static int xilinxfb_assign(struct device *dev, - struct xilinxfb_drvdata *drvdata, - unsigned long physaddr, - struct xilinxfb_platform_data *pdata) -{ - int rc; - int fbsize = pdata->xvirt * pdata->yvirt * BYTES_PER_PIXEL; - - if (drvdata->flags & PLB_ACCESS_FLAG) { - /* - * Map the control registers in if the controller - * is on direct PLB interface. - */ - if (!request_mem_region(physaddr, 8, DRIVER_NAME)) { - dev_err(dev, "Couldn't lock memory region at 0x%08lX\n", - physaddr); - rc = -ENODEV; - goto err_region; - } - - drvdata->regs_phys = physaddr; - drvdata->regs = ioremap(physaddr, 8); - if (!drvdata->regs) { - dev_err(dev, "Couldn't lock memory region at 0x%08lX\n", - physaddr); - rc = -ENODEV; - goto err_map; - } - } - - /* Allocate the framebuffer memory */ - if (pdata->fb_phys) { - drvdata->fb_phys = pdata->fb_phys; - drvdata->fb_virt = ioremap(pdata->fb_phys, fbsize); - } else { - drvdata->fb_alloced = 1; - drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(fbsize), - &drvdata->fb_phys, GFP_KERNEL); - } - - if (!drvdata->fb_virt) { - dev_err(dev, "Could not allocate frame buffer memory\n"); - rc = -ENOMEM; - if (drvdata->flags & PLB_ACCESS_FLAG) - goto err_fbmem; - else - goto err_region; - } - - /* Clear (turn to black) the framebuffer */ - memset_io((void __iomem *)drvdata->fb_virt, 0, fbsize); - - /* Tell the hardware where the frame buffer is */ - xilinx_fb_out_be32(drvdata, REG_FB_ADDR, drvdata->fb_phys); - - /* Turn on the display */ - drvdata->reg_ctrl_default = REG_CTRL_ENABLE; - if (pdata->rotate_screen) - drvdata->reg_ctrl_default |= REG_CTRL_ROTATE; - xilinx_fb_out_be32(drvdata, REG_CTRL, - drvdata->reg_ctrl_default); - - /* Fill struct fb_info */ - drvdata->info.device = dev; - drvdata->info.screen_base = (void __iomem *)drvdata->fb_virt; - drvdata->info.fbops = &xilinxfb_ops; - drvdata->info.fix = xilinx_fb_fix; - drvdata->info.fix.smem_start = drvdata->fb_phys; - drvdata->info.fix.smem_len = fbsize; - drvdata->info.fix.line_length = pdata->xvirt * BYTES_PER_PIXEL; - - drvdata->info.pseudo_palette = drvdata->pseudo_palette; - drvdata->info.flags = FBINFO_DEFAULT; - drvdata->info.var = xilinx_fb_var; - drvdata->info.var.height = pdata->screen_height_mm; - drvdata->info.var.width = pdata->screen_width_mm; - drvdata->info.var.xres = pdata->xres; - drvdata->info.var.yres = pdata->yres; - drvdata->info.var.xres_virtual = pdata->xvirt; - drvdata->info.var.yres_virtual = pdata->yvirt; - - /* Allocate a colour map */ - rc = fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0); - if (rc) { - dev_err(dev, "Fail to allocate colormap (%d entries)\n", - PALETTE_ENTRIES_NO); - goto err_cmap; - } - - /* Register new frame buffer */ - rc = register_framebuffer(&drvdata->info); - if (rc) { - dev_err(dev, "Could not register frame buffer\n"); - goto err_regfb; - } - - if (drvdata->flags & PLB_ACCESS_FLAG) { - /* Put a banner in the log (for DEBUG) */ - dev_dbg(dev, "regs: phys=%lx, virt=%p\n", physaddr, - drvdata->regs); - } - /* Put a banner in the log (for DEBUG) */ - dev_dbg(dev, "fb: phys=%llx, virt=%p, size=%x\n", - (unsigned long long)drvdata->fb_phys, drvdata->fb_virt, fbsize); - - return 0; /* success */ - -err_regfb: - fb_dealloc_cmap(&drvdata->info.cmap); - -err_cmap: - if (drvdata->fb_alloced) - dma_free_coherent(dev, PAGE_ALIGN(fbsize), drvdata->fb_virt, - drvdata->fb_phys); - else - iounmap(drvdata->fb_virt); - - /* Turn off the display */ - xilinx_fb_out_be32(drvdata, REG_CTRL, 0); - -err_fbmem: - if (drvdata->flags & PLB_ACCESS_FLAG) - iounmap(drvdata->regs); - -err_map: - if (drvdata->flags & PLB_ACCESS_FLAG) - release_mem_region(physaddr, 8); - -err_region: - kfree(drvdata); - dev_set_drvdata(dev, NULL); - - return rc; -} - -static int xilinxfb_release(struct device *dev) -{ - struct xilinxfb_drvdata *drvdata = dev_get_drvdata(dev); - -#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) - xilinx_fb_blank(VESA_POWERDOWN, &drvdata->info); -#endif - - unregister_framebuffer(&drvdata->info); - - fb_dealloc_cmap(&drvdata->info.cmap); - - if (drvdata->fb_alloced) - dma_free_coherent(dev, PAGE_ALIGN(drvdata->info.fix.smem_len), - drvdata->fb_virt, drvdata->fb_phys); - else - iounmap(drvdata->fb_virt); - - /* Turn off the display */ - xilinx_fb_out_be32(drvdata, REG_CTRL, 0); - - /* Release the resources, as allocated based on interface */ - if (drvdata->flags & PLB_ACCESS_FLAG) { - iounmap(drvdata->regs); - release_mem_region(drvdata->regs_phys, 8); - } -#ifdef CONFIG_PPC_DCR - else - dcr_unmap(drvdata->dcr_host, drvdata->dcr_len); -#endif - - kfree(drvdata); - dev_set_drvdata(dev, NULL); - - return 0; -} - -/* --------------------------------------------------------------------- - * OF bus binding - */ - -static int xilinxfb_of_probe(struct platform_device *op) -{ - const u32 *prop; - u32 *p; - u32 tft_access; - struct xilinxfb_platform_data pdata; - struct resource res; - int size, rc; - struct xilinxfb_drvdata *drvdata; - - /* Copy with the default pdata (not a ptr reference!) */ - pdata = xilinx_fb_default_pdata; - - /* Allocate the driver data region */ - drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL); - if (!drvdata) { - dev_err(&op->dev, "Couldn't allocate device private record\n"); - return -ENOMEM; - } - - /* - * To check whether the core is connected directly to DCR or PLB - * interface and initialize the tft_access accordingly. - */ - p = (u32 *)of_get_property(op->dev.of_node, "xlnx,dcr-splb-slave-if", NULL); - tft_access = p ? *p : 0; - - /* - * Fill the resource structure if its direct PLB interface - * otherwise fill the dcr_host structure. - */ - if (tft_access) { - drvdata->flags |= PLB_ACCESS_FLAG; - rc = of_address_to_resource(op->dev.of_node, 0, &res); - if (rc) { - dev_err(&op->dev, "invalid address\n"); - goto err; - } - } -#ifdef CONFIG_PPC_DCR - else { - int start; - res.start = 0; - start = dcr_resource_start(op->dev.of_node, 0); - drvdata->dcr_len = dcr_resource_len(op->dev.of_node, 0); - drvdata->dcr_host = dcr_map(op->dev.of_node, start, drvdata->dcr_len); - if (!DCR_MAP_OK(drvdata->dcr_host)) { - dev_err(&op->dev, "invalid DCR address\n"); - goto err; - } - } -#endif - - prop = of_get_property(op->dev.of_node, "phys-size", &size); - if ((prop) && (size >= sizeof(u32)*2)) { - pdata.screen_width_mm = prop[0]; - pdata.screen_height_mm = prop[1]; - } - - prop = of_get_property(op->dev.of_node, "resolution", &size); - if ((prop) && (size >= sizeof(u32)*2)) { - pdata.xres = prop[0]; - pdata.yres = prop[1]; - } - - prop = of_get_property(op->dev.of_node, "virtual-resolution", &size); - if ((prop) && (size >= sizeof(u32)*2)) { - pdata.xvirt = prop[0]; - pdata.yvirt = prop[1]; - } - - if (of_find_property(op->dev.of_node, "rotate-display", NULL)) - pdata.rotate_screen = 1; - - dev_set_drvdata(&op->dev, drvdata); - return xilinxfb_assign(&op->dev, drvdata, res.start, &pdata); - - err: - kfree(drvdata); - return -ENODEV; -} - -static int xilinxfb_of_remove(struct platform_device *op) -{ - return xilinxfb_release(&op->dev); -} - -/* Match table for of_platform binding */ -static struct of_device_id xilinxfb_of_match[] = { - { .compatible = "xlnx,xps-tft-1.00.a", }, - { .compatible = "xlnx,xps-tft-2.00.a", }, - { .compatible = "xlnx,xps-tft-2.01.a", }, - { .compatible = "xlnx,plb-tft-cntlr-ref-1.00.a", }, - { .compatible = "xlnx,plb-dvi-cntlr-ref-1.00.c", }, - {}, -}; -MODULE_DEVICE_TABLE(of, xilinxfb_of_match); - -static struct platform_driver xilinxfb_of_driver = { - .probe = xilinxfb_of_probe, - .remove = xilinxfb_of_remove, - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - .of_match_table = xilinxfb_of_match, - }, -}; - -module_platform_driver(xilinxfb_of_driver); - -MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>"); -MODULE_DESCRIPTION("Xilinx TFT frame buffer driver"); -MODULE_LICENSE("GPL"); |