mirror of https://gitee.com/openkylin/linux.git
1065 lines
27 KiB
C
1065 lines
27 KiB
C
/* linux/drivers/video/s3c-fb.c
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*
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* Copyright 2008 Openmoko Inc.
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* Copyright 2008 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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* http://armlinux.simtec.co.uk/
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*
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* Samsung SoC Framebuffer driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/init.h>
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#include <linux/gfp.h>
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#include <linux/clk.h>
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#include <linux/fb.h>
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#include <linux/io.h>
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#include <mach/map.h>
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#include <mach/regs-fb.h>
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#include <plat/fb.h>
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/* This driver will export a number of framebuffer interfaces depending
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* on the configuration passed in via the platform data. Each fb instance
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* maps to a hardware window. Currently there is no support for runtime
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* setting of the alpha-blending functions that each window has, so only
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* window 0 is actually useful.
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*
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* Window 0 is treated specially, it is used for the basis of the LCD
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* output timings and as the control for the output power-down state.
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*/
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/* note, some of the functions that get called are derived from including
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* <mach/regs-fb.h> as they are specific to the architecture that the code
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* is being built for.
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*/
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#ifdef CONFIG_FB_S3C_DEBUG_REGWRITE
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#undef writel
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#define writel(v, r) do { \
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printk(KERN_DEBUG "%s: %08x => %p\n", __func__, (unsigned int)v, r); \
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__raw_writel(v, r); } while(0)
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#endif /* FB_S3C_DEBUG_REGWRITE */
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struct s3c_fb;
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/**
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* struct s3c_fb_win - per window private data for each framebuffer.
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* @windata: The platform data supplied for the window configuration.
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* @parent: The hardware that this window is part of.
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* @fbinfo: Pointer pack to the framebuffer info for this window.
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* @palette_buffer: Buffer/cache to hold palette entries.
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* @pseudo_palette: For use in TRUECOLOUR modes for entries 0..15/
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* @index: The window number of this window.
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* @palette: The bitfields for changing r/g/b into a hardware palette entry.
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*/
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struct s3c_fb_win {
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struct s3c_fb_pd_win *windata;
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struct s3c_fb *parent;
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struct fb_info *fbinfo;
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struct s3c_fb_palette palette;
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u32 *palette_buffer;
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u32 pseudo_palette[16];
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unsigned int index;
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};
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/**
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* struct s3c_fb - overall hardware state of the hardware
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* @dev: The device that we bound to, for printing, etc.
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* @regs_res: The resource we claimed for the IO registers.
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* @bus_clk: The clk (hclk) feeding our interface and possibly pixclk.
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* @regs: The mapped hardware registers.
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* @enabled: A bitmask of enabled hardware windows.
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* @pdata: The platform configuration data passed with the device.
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* @windows: The hardware windows that have been claimed.
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*/
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struct s3c_fb {
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struct device *dev;
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struct resource *regs_res;
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struct clk *bus_clk;
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void __iomem *regs;
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unsigned char enabled;
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struct s3c_fb_platdata *pdata;
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struct s3c_fb_win *windows[S3C_FB_MAX_WIN];
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};
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/**
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* s3c_fb_win_has_palette() - determine if a mode has a palette
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* @win: The window number being queried.
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* @bpp: The number of bits per pixel to test.
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*
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* Work out if the given window supports palletised data at the specified bpp.
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*/
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static int s3c_fb_win_has_palette(unsigned int win, unsigned int bpp)
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{
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return s3c_fb_win_pal_size(win) <= (1 << bpp);
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}
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/**
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* s3c_fb_check_var() - framebuffer layer request to verify a given mode.
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* @var: The screen information to verify.
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* @info: The framebuffer device.
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*
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* Framebuffer layer call to verify the given information and allow us to
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* update various information depending on the hardware capabilities.
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*/
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static int s3c_fb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct s3c_fb_win *win = info->par;
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struct s3c_fb_pd_win *windata = win->windata;
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struct s3c_fb *sfb = win->parent;
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dev_dbg(sfb->dev, "checking parameters\n");
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var->xres_virtual = max((unsigned int)windata->virtual_x, var->xres);
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var->yres_virtual = max((unsigned int)windata->virtual_y, var->yres);
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if (!s3c_fb_validate_win_bpp(win->index, var->bits_per_pixel)) {
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dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n",
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win->index, var->bits_per_pixel);
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return -EINVAL;
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}
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/* always ensure these are zero, for drop through cases below */
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var->transp.offset = 0;
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var->transp.length = 0;
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switch (var->bits_per_pixel) {
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case 1:
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case 2:
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case 4:
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case 8:
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if (!s3c_fb_win_has_palette(win->index, var->bits_per_pixel)) {
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/* non palletised, A:1,R:2,G:3,B:2 mode */
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var->red.offset = 4;
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var->green.offset = 2;
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var->blue.offset = 0;
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var->red.length = 5;
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var->green.length = 3;
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var->blue.length = 2;
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var->transp.offset = 7;
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var->transp.length = 1;
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} else {
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var->red.offset = 0;
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var->red.length = var->bits_per_pixel;
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var->green = var->red;
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var->blue = var->red;
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}
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break;
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case 19:
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/* 666 with one bit alpha/transparency */
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var->transp.offset = 18;
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var->transp.length = 1;
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case 18:
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var->bits_per_pixel = 32;
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/* 666 format */
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var->red.offset = 12;
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var->green.offset = 6;
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var->blue.offset = 0;
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var->red.length = 6;
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var->green.length = 6;
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var->blue.length = 6;
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break;
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case 16:
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/* 16 bpp, 565 format */
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var->red.offset = 11;
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var->green.offset = 5;
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var->blue.offset = 0;
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var->red.length = 5;
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var->green.length = 6;
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var->blue.length = 5;
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break;
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case 28:
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case 25:
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var->transp.length = var->bits_per_pixel - 24;
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var->transp.offset = 24;
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/* drop through */
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case 24:
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/* our 24bpp is unpacked, so 32bpp */
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var->bits_per_pixel = 32;
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case 32:
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var->red.offset = 16;
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var->red.length = 8;
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var->green.offset = 8;
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var->green.length = 8;
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var->blue.offset = 0;
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var->blue.length = 8;
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break;
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default:
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dev_err(sfb->dev, "invalid bpp\n");
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}
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dev_dbg(sfb->dev, "%s: verified parameters\n", __func__);
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return 0;
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}
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/**
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* s3c_fb_calc_pixclk() - calculate the divider to create the pixel clock.
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* @id: window id.
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* @sfb: The hardware state.
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* @pixclock: The pixel clock wanted, in picoseconds.
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*
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* Given the specified pixel clock, work out the necessary divider to get
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* close to the output frequency.
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*/
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static int s3c_fb_calc_pixclk(unsigned char id, struct s3c_fb *sfb, unsigned int pixclk)
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{
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struct s3c_fb_pd_win *win = sfb->pdata->win[id];
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unsigned long clk = clk_get_rate(sfb->bus_clk);
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unsigned int result;
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pixclk *= win->win_mode.refresh;
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result = clk / pixclk;
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dev_dbg(sfb->dev, "pixclk=%u, clk=%lu, div=%d (%lu)\n",
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pixclk, clk, result, clk / result);
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return result;
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}
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/**
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* s3c_fb_align_word() - align pixel count to word boundary
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* @bpp: The number of bits per pixel
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* @pix: The value to be aligned.
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*
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* Align the given pixel count so that it will start on an 32bit word
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* boundary.
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*/
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static int s3c_fb_align_word(unsigned int bpp, unsigned int pix)
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{
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int pix_per_word;
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if (bpp > 16)
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return pix;
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pix_per_word = (8 * 32) / bpp;
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return ALIGN(pix, pix_per_word);
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}
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/**
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* s3c_fb_set_par() - framebuffer request to set new framebuffer state.
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* @info: The framebuffer to change.
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*
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* Framebuffer layer request to set a new mode for the specified framebuffer
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*/
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static int s3c_fb_set_par(struct fb_info *info)
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{
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struct fb_var_screeninfo *var = &info->var;
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struct s3c_fb_win *win = info->par;
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struct s3c_fb *sfb = win->parent;
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void __iomem *regs = sfb->regs;
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int win_no = win->index;
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u32 osdc_data = 0;
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u32 data;
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u32 pagewidth;
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int clkdiv;
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dev_dbg(sfb->dev, "setting framebuffer parameters\n");
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switch (var->bits_per_pixel) {
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case 32:
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case 24:
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case 16:
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case 12:
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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break;
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case 8:
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if (s3c_fb_win_has_palette(win_no, 8))
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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else
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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break;
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case 1:
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info->fix.visual = FB_VISUAL_MONO01;
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break;
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default:
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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break;
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}
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info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
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/* disable the window whilst we update it */
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writel(0, regs + WINCON(win_no));
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/* use window 0 as the basis for the lcd output timings */
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if (win_no == 0) {
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clkdiv = s3c_fb_calc_pixclk(win_no, sfb, var->pixclock);
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data = sfb->pdata->vidcon0;
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data &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR);
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if (clkdiv > 1)
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data |= VIDCON0_CLKVAL_F(clkdiv-1) | VIDCON0_CLKDIR;
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else
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data &= ~VIDCON0_CLKDIR; /* 1:1 clock */
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/* write the timing data to the panel */
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data |= VIDCON0_ENVID | VIDCON0_ENVID_F;
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writel(data, regs + VIDCON0);
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data = VIDTCON0_VBPD(var->upper_margin - 1) |
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VIDTCON0_VFPD(var->lower_margin - 1) |
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VIDTCON0_VSPW(var->vsync_len - 1);
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writel(data, regs + VIDTCON0);
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data = VIDTCON1_HBPD(var->left_margin - 1) |
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VIDTCON1_HFPD(var->right_margin - 1) |
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VIDTCON1_HSPW(var->hsync_len - 1);
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writel(data, regs + VIDTCON1);
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data = VIDTCON2_LINEVAL(var->yres - 1) |
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VIDTCON2_HOZVAL(var->xres - 1);
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writel(data, regs + VIDTCON2);
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}
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/* write the buffer address */
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writel(info->fix.smem_start, regs + VIDW_BUF_START(win_no));
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data = info->fix.smem_start + info->fix.line_length * var->yres;
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writel(data, regs + VIDW_BUF_END(win_no));
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pagewidth = (var->xres * var->bits_per_pixel) >> 3;
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data = VIDW_BUF_SIZE_OFFSET(info->fix.line_length - pagewidth) |
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VIDW_BUF_SIZE_PAGEWIDTH(pagewidth);
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writel(data, regs + VIDW_BUF_SIZE(win_no));
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/* write 'OSD' registers to control position of framebuffer */
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data = VIDOSDxA_TOPLEFT_X(0) | VIDOSDxA_TOPLEFT_Y(0);
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writel(data, regs + VIDOSD_A(win_no));
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data = VIDOSDxB_BOTRIGHT_X(s3c_fb_align_word(var->bits_per_pixel,
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var->xres - 1)) |
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VIDOSDxB_BOTRIGHT_Y(var->yres - 1);
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writel(data, regs + VIDOSD_B(win_no));
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data = var->xres * var->yres;
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osdc_data = VIDISD14C_ALPHA1_R(0xf) |
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VIDISD14C_ALPHA1_G(0xf) |
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VIDISD14C_ALPHA1_B(0xf);
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if (s3c_fb_has_osd_d(win_no)) {
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writel(data, regs + VIDOSD_D(win_no));
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writel(osdc_data, regs + VIDOSD_C(win_no));
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} else
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writel(data, regs + VIDOSD_C(win_no));
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data = WINCONx_ENWIN;
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/* note, since we have to round up the bits-per-pixel, we end up
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* relying on the bitfield information for r/g/b/a to work out
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* exactly which mode of operation is intended. */
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switch (var->bits_per_pixel) {
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case 1:
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data |= WINCON0_BPPMODE_1BPP;
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data |= WINCONx_BITSWP;
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data |= WINCONx_BURSTLEN_4WORD;
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break;
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case 2:
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data |= WINCON0_BPPMODE_2BPP;
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data |= WINCONx_BITSWP;
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data |= WINCONx_BURSTLEN_8WORD;
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break;
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case 4:
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data |= WINCON0_BPPMODE_4BPP;
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data |= WINCONx_BITSWP;
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data |= WINCONx_BURSTLEN_8WORD;
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break;
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case 8:
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if (var->transp.length != 0)
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data |= WINCON1_BPPMODE_8BPP_1232;
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else
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data |= WINCON0_BPPMODE_8BPP_PALETTE;
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data |= WINCONx_BURSTLEN_8WORD;
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data |= WINCONx_BYTSWP;
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break;
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case 16:
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if (var->transp.length != 0)
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data |= WINCON1_BPPMODE_16BPP_A1555;
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else
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data |= WINCON0_BPPMODE_16BPP_565;
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data |= WINCONx_HAWSWP;
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data |= WINCONx_BURSTLEN_16WORD;
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break;
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case 24:
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case 32:
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if (var->red.length == 6) {
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if (var->transp.length != 0)
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data |= WINCON1_BPPMODE_19BPP_A1666;
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else
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data |= WINCON1_BPPMODE_18BPP_666;
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} else if (var->transp.length == 1)
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data |= WINCON1_BPPMODE_25BPP_A1888
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| WINCON1_BLD_PIX;
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else if (var->transp.length == 4)
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data |= WINCON1_BPPMODE_28BPP_A4888
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| WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
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else
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data |= WINCON0_BPPMODE_24BPP_888;
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data |= WINCONx_BURSTLEN_16WORD;
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break;
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}
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/* It has no color key control register for window0 */
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if (win_no > 0) {
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u32 keycon0_data = 0, keycon1_data = 0;
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keycon0_data = ~(WxKEYCON0_KEYBL_EN |
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WxKEYCON0_KEYEN_F |
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WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
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keycon1_data = WxKEYCON1_COLVAL(0xffffff);
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writel(keycon0_data, regs + WxKEYCONy(win_no-1, 0));
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writel(keycon1_data, regs + WxKEYCONy(win_no-1, 1));
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}
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writel(data, regs + WINCON(win_no));
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writel(0x0, regs + WINxMAP(win_no));
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return 0;
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}
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/**
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* s3c_fb_update_palette() - set or schedule a palette update.
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* @sfb: The hardware information.
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* @win: The window being updated.
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* @reg: The palette index being changed.
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* @value: The computed palette value.
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*
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* Change the value of a palette register, either by directly writing to
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* the palette (this requires the palette RAM to be disconnected from the
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* hardware whilst this is in progress) or schedule the update for later.
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*
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* At the moment, since we have no VSYNC interrupt support, we simply set
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* the palette entry directly.
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*/
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static void s3c_fb_update_palette(struct s3c_fb *sfb,
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struct s3c_fb_win *win,
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unsigned int reg,
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u32 value)
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{
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void __iomem *palreg;
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u32 palcon;
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palreg = sfb->regs + s3c_fb_pal_reg(win->index, reg);
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dev_dbg(sfb->dev, "%s: win %d, reg %d (%p): %08x\n",
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__func__, win->index, reg, palreg, value);
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win->palette_buffer[reg] = value;
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palcon = readl(sfb->regs + WPALCON);
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writel(palcon | WPALCON_PAL_UPDATE, sfb->regs + WPALCON);
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if (s3c_fb_pal_is16(win->index))
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writew(value, palreg);
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else
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writel(value, palreg);
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writel(palcon, sfb->regs + WPALCON);
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}
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|
|
static inline unsigned int chan_to_field(unsigned int chan,
|
|
struct fb_bitfield *bf)
|
|
{
|
|
chan &= 0xffff;
|
|
chan >>= 16 - bf->length;
|
|
return chan << bf->offset;
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_setcolreg() - framebuffer layer request to change palette.
|
|
* @regno: The palette index to change.
|
|
* @red: The red field for the palette data.
|
|
* @green: The green field for the palette data.
|
|
* @blue: The blue field for the palette data.
|
|
* @trans: The transparency (alpha) field for the palette data.
|
|
* @info: The framebuffer being changed.
|
|
*/
|
|
static int s3c_fb_setcolreg(unsigned regno,
|
|
unsigned red, unsigned green, unsigned blue,
|
|
unsigned transp, struct fb_info *info)
|
|
{
|
|
struct s3c_fb_win *win = info->par;
|
|
struct s3c_fb *sfb = win->parent;
|
|
unsigned int val;
|
|
|
|
dev_dbg(sfb->dev, "%s: win %d: %d => rgb=%d/%d/%d\n",
|
|
__func__, win->index, regno, red, green, blue);
|
|
|
|
switch (info->fix.visual) {
|
|
case FB_VISUAL_TRUECOLOR:
|
|
/* true-colour, use pseudo-palette */
|
|
|
|
if (regno < 16) {
|
|
u32 *pal = info->pseudo_palette;
|
|
|
|
val = chan_to_field(red, &info->var.red);
|
|
val |= chan_to_field(green, &info->var.green);
|
|
val |= chan_to_field(blue, &info->var.blue);
|
|
|
|
pal[regno] = val;
|
|
}
|
|
break;
|
|
|
|
case FB_VISUAL_PSEUDOCOLOR:
|
|
if (regno < s3c_fb_win_pal_size(win->index)) {
|
|
val = chan_to_field(red, &win->palette.r);
|
|
val |= chan_to_field(green, &win->palette.g);
|
|
val |= chan_to_field(blue, &win->palette.b);
|
|
|
|
s3c_fb_update_palette(sfb, win, regno, val);
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
return 1; /* unknown type */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_enable() - Set the state of the main LCD output
|
|
* @sfb: The main framebuffer state.
|
|
* @enable: The state to set.
|
|
*/
|
|
static void s3c_fb_enable(struct s3c_fb *sfb, int enable)
|
|
{
|
|
u32 vidcon0 = readl(sfb->regs + VIDCON0);
|
|
|
|
if (enable)
|
|
vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F;
|
|
else {
|
|
/* see the note in the framebuffer datasheet about
|
|
* why you cannot take both of these bits down at the
|
|
* same time. */
|
|
|
|
if (!(vidcon0 & VIDCON0_ENVID))
|
|
return;
|
|
|
|
vidcon0 |= VIDCON0_ENVID;
|
|
vidcon0 &= ~VIDCON0_ENVID_F;
|
|
}
|
|
|
|
writel(vidcon0, sfb->regs + VIDCON0);
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_blank() - blank or unblank the given window
|
|
* @blank_mode: The blank state from FB_BLANK_*
|
|
* @info: The framebuffer to blank.
|
|
*
|
|
* Framebuffer layer request to change the power state.
|
|
*/
|
|
static int s3c_fb_blank(int blank_mode, struct fb_info *info)
|
|
{
|
|
struct s3c_fb_win *win = info->par;
|
|
struct s3c_fb *sfb = win->parent;
|
|
unsigned int index = win->index;
|
|
u32 wincon;
|
|
|
|
dev_dbg(sfb->dev, "blank mode %d\n", blank_mode);
|
|
|
|
wincon = readl(sfb->regs + WINCON(index));
|
|
|
|
switch (blank_mode) {
|
|
case FB_BLANK_POWERDOWN:
|
|
wincon &= ~WINCONx_ENWIN;
|
|
sfb->enabled &= ~(1 << index);
|
|
/* fall through to FB_BLANK_NORMAL */
|
|
|
|
case FB_BLANK_NORMAL:
|
|
/* disable the DMA and display 0x0 (black) */
|
|
writel(WINxMAP_MAP | WINxMAP_MAP_COLOUR(0x0),
|
|
sfb->regs + WINxMAP(index));
|
|
break;
|
|
|
|
case FB_BLANK_UNBLANK:
|
|
writel(0x0, sfb->regs + WINxMAP(index));
|
|
wincon |= WINCONx_ENWIN;
|
|
sfb->enabled |= (1 << index);
|
|
break;
|
|
|
|
case FB_BLANK_VSYNC_SUSPEND:
|
|
case FB_BLANK_HSYNC_SUSPEND:
|
|
default:
|
|
return 1;
|
|
}
|
|
|
|
writel(wincon, sfb->regs + WINCON(index));
|
|
|
|
/* Check the enabled state to see if we need to be running the
|
|
* main LCD interface, as if there are no active windows then
|
|
* it is highly likely that we also do not need to output
|
|
* anything.
|
|
*/
|
|
|
|
/* We could do something like the following code, but the current
|
|
* system of using framebuffer events means that we cannot make
|
|
* the distinction between just window 0 being inactive and all
|
|
* the windows being down.
|
|
*
|
|
* s3c_fb_enable(sfb, sfb->enabled ? 1 : 0);
|
|
*/
|
|
|
|
/* we're stuck with this until we can do something about overriding
|
|
* the power control using the blanking event for a single fb.
|
|
*/
|
|
if (index == 0)
|
|
s3c_fb_enable(sfb, blank_mode != FB_BLANK_POWERDOWN ? 1 : 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops s3c_fb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_check_var = s3c_fb_check_var,
|
|
.fb_set_par = s3c_fb_set_par,
|
|
.fb_blank = s3c_fb_blank,
|
|
.fb_setcolreg = s3c_fb_setcolreg,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
};
|
|
|
|
/**
|
|
* s3c_fb_alloc_memory() - allocate display memory for framebuffer window
|
|
* @sfb: The base resources for the hardware.
|
|
* @win: The window to initialise memory for.
|
|
*
|
|
* Allocate memory for the given framebuffer.
|
|
*/
|
|
static int __devinit s3c_fb_alloc_memory(struct s3c_fb *sfb,
|
|
struct s3c_fb_win *win)
|
|
{
|
|
struct s3c_fb_pd_win *windata = win->windata;
|
|
unsigned int real_size, virt_size, size;
|
|
struct fb_info *fbi = win->fbinfo;
|
|
dma_addr_t map_dma;
|
|
|
|
dev_dbg(sfb->dev, "allocating memory for display\n");
|
|
|
|
real_size = windata->win_mode.xres * windata->win_mode.yres;
|
|
virt_size = windata->virtual_x * windata->virtual_y;
|
|
|
|
dev_dbg(sfb->dev, "real_size=%u (%u.%u), virt_size=%u (%u.%u)\n",
|
|
real_size, windata->win_mode.xres, windata->win_mode.yres,
|
|
virt_size, windata->virtual_x, windata->virtual_y);
|
|
|
|
size = (real_size > virt_size) ? real_size : virt_size;
|
|
size *= (windata->max_bpp > 16) ? 32 : windata->max_bpp;
|
|
size /= 8;
|
|
|
|
fbi->fix.smem_len = size;
|
|
size = PAGE_ALIGN(size);
|
|
|
|
dev_dbg(sfb->dev, "want %u bytes for window\n", size);
|
|
|
|
fbi->screen_base = dma_alloc_writecombine(sfb->dev, size,
|
|
&map_dma, GFP_KERNEL);
|
|
if (!fbi->screen_base)
|
|
return -ENOMEM;
|
|
|
|
dev_dbg(sfb->dev, "mapped %x to %p\n",
|
|
(unsigned int)map_dma, fbi->screen_base);
|
|
|
|
memset(fbi->screen_base, 0x0, size);
|
|
fbi->fix.smem_start = map_dma;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_free_memory() - free the display memory for the given window
|
|
* @sfb: The base resources for the hardware.
|
|
* @win: The window to free the display memory for.
|
|
*
|
|
* Free the display memory allocated by s3c_fb_alloc_memory().
|
|
*/
|
|
static void s3c_fb_free_memory(struct s3c_fb *sfb, struct s3c_fb_win *win)
|
|
{
|
|
struct fb_info *fbi = win->fbinfo;
|
|
|
|
dma_free_writecombine(sfb->dev, PAGE_ALIGN(fbi->fix.smem_len),
|
|
fbi->screen_base, fbi->fix.smem_start);
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_release_win() - release resources for a framebuffer window.
|
|
* @win: The window to cleanup the resources for.
|
|
*
|
|
* Release the resources that where claimed for the hardware window,
|
|
* such as the framebuffer instance and any memory claimed for it.
|
|
*/
|
|
static void s3c_fb_release_win(struct s3c_fb *sfb, struct s3c_fb_win *win)
|
|
{
|
|
if (win->fbinfo) {
|
|
unregister_framebuffer(win->fbinfo);
|
|
fb_dealloc_cmap(&win->fbinfo->cmap);
|
|
s3c_fb_free_memory(sfb, win);
|
|
framebuffer_release(win->fbinfo);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_probe_win() - register an hardware window
|
|
* @sfb: The base resources for the hardware
|
|
* @res: Pointer to where to place the resultant window.
|
|
*
|
|
* Allocate and do the basic initialisation for one of the hardware's graphics
|
|
* windows.
|
|
*/
|
|
static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
|
|
struct s3c_fb_win **res)
|
|
{
|
|
struct fb_var_screeninfo *var;
|
|
struct fb_videomode *initmode;
|
|
struct s3c_fb_pd_win *windata;
|
|
struct s3c_fb_win *win;
|
|
struct fb_info *fbinfo;
|
|
int palette_size;
|
|
int ret;
|
|
|
|
dev_dbg(sfb->dev, "probing window %d\n", win_no);
|
|
|
|
palette_size = s3c_fb_win_pal_size(win_no);
|
|
|
|
fbinfo = framebuffer_alloc(sizeof(struct s3c_fb_win) +
|
|
palette_size * sizeof(u32), sfb->dev);
|
|
if (!fbinfo) {
|
|
dev_err(sfb->dev, "failed to allocate framebuffer\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
windata = sfb->pdata->win[win_no];
|
|
initmode = &windata->win_mode;
|
|
|
|
WARN_ON(windata->max_bpp == 0);
|
|
WARN_ON(windata->win_mode.xres == 0);
|
|
WARN_ON(windata->win_mode.yres == 0);
|
|
|
|
win = fbinfo->par;
|
|
var = &fbinfo->var;
|
|
win->fbinfo = fbinfo;
|
|
win->parent = sfb;
|
|
win->windata = windata;
|
|
win->index = win_no;
|
|
win->palette_buffer = (u32 *)(win + 1);
|
|
|
|
ret = s3c_fb_alloc_memory(sfb, win);
|
|
if (ret) {
|
|
dev_err(sfb->dev, "failed to allocate display memory\n");
|
|
return ret;
|
|
}
|
|
|
|
/* setup the r/b/g positions for the window's palette */
|
|
s3c_fb_init_palette(win_no, &win->palette);
|
|
|
|
/* setup the initial video mode from the window */
|
|
fb_videomode_to_var(&fbinfo->var, initmode);
|
|
|
|
fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
fbinfo->fix.accel = FB_ACCEL_NONE;
|
|
fbinfo->var.activate = FB_ACTIVATE_NOW;
|
|
fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
|
|
fbinfo->var.bits_per_pixel = windata->default_bpp;
|
|
fbinfo->fbops = &s3c_fb_ops;
|
|
fbinfo->flags = FBINFO_FLAG_DEFAULT;
|
|
fbinfo->pseudo_palette = &win->pseudo_palette;
|
|
|
|
/* prepare to actually start the framebuffer */
|
|
|
|
ret = s3c_fb_check_var(&fbinfo->var, fbinfo);
|
|
if (ret < 0) {
|
|
dev_err(sfb->dev, "check_var failed on initial video params\n");
|
|
return ret;
|
|
}
|
|
|
|
/* create initial colour map */
|
|
|
|
ret = fb_alloc_cmap(&fbinfo->cmap, s3c_fb_win_pal_size(win_no), 1);
|
|
if (ret == 0)
|
|
fb_set_cmap(&fbinfo->cmap, fbinfo);
|
|
else
|
|
dev_err(sfb->dev, "failed to allocate fb cmap\n");
|
|
|
|
s3c_fb_set_par(fbinfo);
|
|
|
|
dev_dbg(sfb->dev, "about to register framebuffer\n");
|
|
|
|
/* run the check_var and set_par on our configuration. */
|
|
|
|
ret = register_framebuffer(fbinfo);
|
|
if (ret < 0) {
|
|
dev_err(sfb->dev, "failed to register framebuffer\n");
|
|
return ret;
|
|
}
|
|
|
|
*res = win;
|
|
dev_info(sfb->dev, "window %d: fb %s\n", win_no, fbinfo->fix.id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_clear_win() - clear hardware window registers.
|
|
* @sfb: The base resources for the hardware.
|
|
* @win: The window to process.
|
|
*
|
|
* Reset the specific window registers to a known state.
|
|
*/
|
|
static void s3c_fb_clear_win(struct s3c_fb *sfb, int win)
|
|
{
|
|
void __iomem *regs = sfb->regs;
|
|
|
|
writel(0, regs + WINCON(win));
|
|
writel(0xffffff, regs + WxKEYCONy(win, 0));
|
|
writel(0xffffff, regs + WxKEYCONy(win, 1));
|
|
|
|
writel(0, regs + VIDOSD_A(win));
|
|
writel(0, regs + VIDOSD_B(win));
|
|
writel(0, regs + VIDOSD_C(win));
|
|
}
|
|
|
|
static int __devinit s3c_fb_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct s3c_fb_platdata *pd;
|
|
struct s3c_fb *sfb;
|
|
struct resource *res;
|
|
int win;
|
|
int ret = 0;
|
|
|
|
pd = pdev->dev.platform_data;
|
|
if (!pd) {
|
|
dev_err(dev, "no platform data specified\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
sfb = kzalloc(sizeof(struct s3c_fb), GFP_KERNEL);
|
|
if (!sfb) {
|
|
dev_err(dev, "no memory for framebuffers\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
sfb->dev = dev;
|
|
sfb->pdata = pd;
|
|
|
|
sfb->bus_clk = clk_get(dev, "lcd");
|
|
if (IS_ERR(sfb->bus_clk)) {
|
|
dev_err(dev, "failed to get bus clock\n");
|
|
goto err_sfb;
|
|
}
|
|
|
|
clk_enable(sfb->bus_clk);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(dev, "failed to find registers\n");
|
|
ret = -ENOENT;
|
|
goto err_clk;
|
|
}
|
|
|
|
sfb->regs_res = request_mem_region(res->start, resource_size(res),
|
|
dev_name(dev));
|
|
if (!sfb->regs_res) {
|
|
dev_err(dev, "failed to claim register region\n");
|
|
ret = -ENOENT;
|
|
goto err_clk;
|
|
}
|
|
|
|
sfb->regs = ioremap(res->start, resource_size(res));
|
|
if (!sfb->regs) {
|
|
dev_err(dev, "failed to map registers\n");
|
|
ret = -ENXIO;
|
|
goto err_req_region;
|
|
}
|
|
|
|
dev_dbg(dev, "got resources (regs %p), probing windows\n", sfb->regs);
|
|
|
|
/* setup gpio and output polarity controls */
|
|
|
|
pd->setup_gpio();
|
|
|
|
writel(pd->vidcon1, sfb->regs + VIDCON1);
|
|
|
|
/* zero all windows before we do anything */
|
|
|
|
for (win = 0; win < S3C_FB_MAX_WIN; win++)
|
|
s3c_fb_clear_win(sfb, win);
|
|
|
|
/* we have the register setup, start allocating framebuffers */
|
|
|
|
for (win = 0; win < S3C_FB_MAX_WIN; win++) {
|
|
if (!pd->win[win])
|
|
continue;
|
|
|
|
ret = s3c_fb_probe_win(sfb, win, &sfb->windows[win]);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to create window %d\n", win);
|
|
for (; win >= 0; win--)
|
|
s3c_fb_release_win(sfb, sfb->windows[win]);
|
|
goto err_ioremap;
|
|
}
|
|
}
|
|
|
|
platform_set_drvdata(pdev, sfb);
|
|
|
|
return 0;
|
|
|
|
err_ioremap:
|
|
iounmap(sfb->regs);
|
|
|
|
err_req_region:
|
|
release_resource(sfb->regs_res);
|
|
kfree(sfb->regs_res);
|
|
|
|
err_clk:
|
|
clk_disable(sfb->bus_clk);
|
|
clk_put(sfb->bus_clk);
|
|
|
|
err_sfb:
|
|
kfree(sfb);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* s3c_fb_remove() - Cleanup on module finalisation
|
|
* @pdev: The platform device we are bound to.
|
|
*
|
|
* Shutdown and then release all the resources that the driver allocated
|
|
* on initialisation.
|
|
*/
|
|
static int __devexit s3c_fb_remove(struct platform_device *pdev)
|
|
{
|
|
struct s3c_fb *sfb = platform_get_drvdata(pdev);
|
|
int win;
|
|
|
|
for (win = 0; win < S3C_FB_MAX_WIN; win++)
|
|
if (sfb->windows[win])
|
|
s3c_fb_release_win(sfb, sfb->windows[win]);
|
|
|
|
iounmap(sfb->regs);
|
|
|
|
clk_disable(sfb->bus_clk);
|
|
clk_put(sfb->bus_clk);
|
|
|
|
release_resource(sfb->regs_res);
|
|
kfree(sfb->regs_res);
|
|
|
|
kfree(sfb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int s3c_fb_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct s3c_fb *sfb = platform_get_drvdata(pdev);
|
|
struct s3c_fb_win *win;
|
|
int win_no;
|
|
|
|
for (win_no = S3C_FB_MAX_WIN - 1; win_no >= 0; win_no--) {
|
|
win = sfb->windows[win_no];
|
|
if (!win)
|
|
continue;
|
|
|
|
/* use the blank function to push into power-down */
|
|
s3c_fb_blank(FB_BLANK_POWERDOWN, win->fbinfo);
|
|
}
|
|
|
|
clk_disable(sfb->bus_clk);
|
|
return 0;
|
|
}
|
|
|
|
static int s3c_fb_resume(struct platform_device *pdev)
|
|
{
|
|
struct s3c_fb *sfb = platform_get_drvdata(pdev);
|
|
struct s3c_fb_platdata *pd = sfb->pdata;
|
|
struct s3c_fb_win *win;
|
|
int win_no;
|
|
|
|
clk_enable(sfb->bus_clk);
|
|
|
|
/* setup registers */
|
|
writel(pd->vidcon1, sfb->regs + VIDCON1);
|
|
|
|
/* zero all windows before we do anything */
|
|
for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++)
|
|
s3c_fb_clear_win(sfb, win_no);
|
|
|
|
/* restore framebuffers */
|
|
for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) {
|
|
win = sfb->windows[win_no];
|
|
if (!win)
|
|
continue;
|
|
|
|
dev_dbg(&pdev->dev, "resuming window %d\n", win_no);
|
|
s3c_fb_set_par(win->fbinfo);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define s3c_fb_suspend NULL
|
|
#define s3c_fb_resume NULL
|
|
#endif
|
|
|
|
static struct platform_driver s3c_fb_driver = {
|
|
.probe = s3c_fb_probe,
|
|
.remove = s3c_fb_remove,
|
|
.suspend = s3c_fb_suspend,
|
|
.resume = s3c_fb_resume,
|
|
.driver = {
|
|
.name = "s3c-fb",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init s3c_fb_init(void)
|
|
{
|
|
return platform_driver_register(&s3c_fb_driver);
|
|
}
|
|
|
|
static void __exit s3c_fb_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&s3c_fb_driver);
|
|
}
|
|
|
|
module_init(s3c_fb_init);
|
|
module_exit(s3c_fb_cleanup);
|
|
|
|
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
|
|
MODULE_DESCRIPTION("Samsung S3C SoC Framebuffer driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:s3c-fb");
|