diff options
Diffstat (limited to 'drivers/video/s3c-fb.c')
| -rw-r--r-- | drivers/video/s3c-fb.c | 1066 |
1 files changed, 0 insertions, 1066 deletions
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c deleted file mode 100644 index 9682ecc60e1..00000000000 --- a/drivers/video/s3c-fb.c +++ /dev/null @@ -1,1066 +0,0 @@ -/* linux/drivers/video/s3c-fb.c - * - * Copyright 2008 Openmoko Inc. - * Copyright 2008 Simtec Electronics - * Ben Dooks <ben@simtec.co.uk> - * http://armlinux.simtec.co.uk/ - * - * Samsung SoC Framebuffer driver - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/clk.h> -#include <linux/fb.h> -#include <linux/io.h> - -#include <mach/map.h> -#include <mach/regs-fb.h> -#include <plat/fb.h> - -/* This driver will export a number of framebuffer interfaces depending - * on the configuration passed in via the platform data. Each fb instance - * maps to a hardware window. Currently there is no support for runtime - * setting of the alpha-blending functions that each window has, so only - * window 0 is actually useful. - * - * Window 0 is treated specially, it is used for the basis of the LCD - * output timings and as the control for the output power-down state. -*/ - -/* note, some of the functions that get called are derived from including - * <mach/regs-fb.h> as they are specific to the architecture that the code - * is being built for. -*/ - -#ifdef CONFIG_FB_S3C_DEBUG_REGWRITE -#undef writel -#define writel(v, r) do { \ - printk(KERN_DEBUG "%s: %08x => %p\n", __func__, (unsigned int)v, r); \ - __raw_writel(v, r); } while(0) -#endif /* FB_S3C_DEBUG_REGWRITE */ - -struct s3c_fb; - -/** - * struct s3c_fb_win - per window private data for each framebuffer. - * @windata: The platform data supplied for the window configuration. - * @parent: The hardware that this window is part of. - * @fbinfo: Pointer pack to the framebuffer info for this window. - * @palette_buffer: Buffer/cache to hold palette entries. - * @pseudo_palette: For use in TRUECOLOUR modes for entries 0..15/ - * @index: The window number of this window. - * @palette: The bitfields for changing r/g/b into a hardware palette entry. - */ -struct s3c_fb_win { - struct s3c_fb_pd_win *windata; - struct s3c_fb *parent; - struct fb_info *fbinfo; - struct s3c_fb_palette palette; - - u32 *palette_buffer; - u32 pseudo_palette[16]; - unsigned int index; -}; - -/** - * struct s3c_fb - overall hardware state of the hardware - * @dev: The device that we bound to, for printing, etc. - * @regs_res: The resource we claimed for the IO registers. - * @bus_clk: The clk (hclk) feeding our interface and possibly pixclk. - * @regs: The mapped hardware registers. - * @enabled: A bitmask of enabled hardware windows. - * @pdata: The platform configuration data passed with the device. - * @windows: The hardware windows that have been claimed. - */ -struct s3c_fb { - struct device *dev; - struct resource *regs_res; - struct clk *bus_clk; - void __iomem *regs; - - unsigned char enabled; - - struct s3c_fb_platdata *pdata; - struct s3c_fb_win *windows[S3C_FB_MAX_WIN]; -}; - -/** - * s3c_fb_win_has_palette() - determine if a mode has a palette - * @win: The window number being queried. - * @bpp: The number of bits per pixel to test. - * - * Work out if the given window supports palletised data at the specified bpp. - */ -static int s3c_fb_win_has_palette(unsigned int win, unsigned int bpp) -{ - return s3c_fb_win_pal_size(win) <= (1 << bpp); -} - -/** - * s3c_fb_check_var() - framebuffer layer request to verify a given mode. - * @var: The screen information to verify. - * @info: The framebuffer device. - * - * Framebuffer layer call to verify the given information and allow us to - * update various information depending on the hardware capabilities. - */ -static int s3c_fb_check_var(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - struct s3c_fb_win *win = info->par; - struct s3c_fb_pd_win *windata = win->windata; - struct s3c_fb *sfb = win->parent; - - dev_dbg(sfb->dev, "checking parameters\n"); - - var->xres_virtual = max((unsigned int)windata->virtual_x, var->xres); - var->yres_virtual = max((unsigned int)windata->virtual_y, var->yres); - - if (!s3c_fb_validate_win_bpp(win->index, var->bits_per_pixel)) { - dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n", - win->index, var->bits_per_pixel); - return -EINVAL; - } - - /* always ensure these are zero, for drop through cases below */ - var->transp.offset = 0; - var->transp.length = 0; - - switch (var->bits_per_pixel) { - case 1: - case 2: - case 4: - case 8: - if (!s3c_fb_win_has_palette(win->index, var->bits_per_pixel)) { - /* non palletised, A:1,R:2,G:3,B:2 mode */ - var->red.offset = 4; - var->green.offset = 2; - var->blue.offset = 0; - var->red.length = 5; - var->green.length = 3; - var->blue.length = 2; - var->transp.offset = 7; - var->transp.length = 1; - } else { - var->red.offset = 0; - var->red.length = var->bits_per_pixel; - var->green = var->red; - var->blue = var->red; - } - break; - - case 19: - /* 666 with one bit alpha/transparency */ - var->transp.offset = 18; - var->transp.length = 1; - case 18: - var->bits_per_pixel = 32; - - /* 666 format */ - var->red.offset = 12; - var->green.offset = 6; - var->blue.offset = 0; - var->red.length = 6; - var->green.length = 6; - var->blue.length = 6; - break; - - case 16: - /* 16 bpp, 565 format */ - var->red.offset = 11; - var->green.offset = 5; - var->blue.offset = 0; - var->red.length = 5; - var->green.length = 6; - var->blue.length = 5; - break; - - case 28: - case 25: - var->transp.length = var->bits_per_pixel - 24; - var->transp.offset = 24; - /* drop through */ - case 24: - /* our 24bpp is unpacked, so 32bpp */ - var->bits_per_pixel = 32; - case 32: - var->red.offset = 16; - var->red.length = 8; - var->green.offset = 8; - var->green.length = 8; - var->blue.offset = 0; - var->blue.length = 8; - break; - - default: - dev_err(sfb->dev, "invalid bpp\n"); - } - - dev_dbg(sfb->dev, "%s: verified parameters\n", __func__); - return 0; -} - -/** - * s3c_fb_calc_pixclk() - calculate the divider to create the pixel clock. - * @sfb: The hardware state. - * @pixclock: The pixel clock wanted, in picoseconds. - * - * Given the specified pixel clock, work out the necessary divider to get - * close to the output frequency. - */ -static int s3c_fb_calc_pixclk(struct s3c_fb *sfb, unsigned int pixclk) -{ - unsigned long clk = clk_get_rate(sfb->bus_clk); - unsigned long long tmp; - unsigned int result; - - tmp = (unsigned long long)clk; - tmp *= pixclk; - - do_div(tmp, 1000000000UL); - result = (unsigned int)tmp / 1000; - - dev_dbg(sfb->dev, "pixclk=%u, clk=%lu, div=%d (%lu)\n", - pixclk, clk, result, clk / result); - - return result; -} - -/** - * s3c_fb_align_word() - align pixel count to word boundary - * @bpp: The number of bits per pixel - * @pix: The value to be aligned. - * - * Align the given pixel count so that it will start on an 32bit word - * boundary. - */ -static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) -{ - int pix_per_word; - - if (bpp > 16) - return pix; - - pix_per_word = (8 * 32) / bpp; - return ALIGN(pix, pix_per_word); -} - -/** - * s3c_fb_set_par() - framebuffer request to set new framebuffer state. - * @info: The framebuffer to change. - * - * Framebuffer layer request to set a new mode for the specified framebuffer - */ -static int s3c_fb_set_par(struct fb_info *info) -{ - struct fb_var_screeninfo *var = &info->var; - struct s3c_fb_win *win = info->par; - struct s3c_fb *sfb = win->parent; - void __iomem *regs = sfb->regs; - int win_no = win->index; - u32 osdc_data = 0; - u32 data; - u32 pagewidth; - int clkdiv; - - dev_dbg(sfb->dev, "setting framebuffer parameters\n"); - - switch (var->bits_per_pixel) { - case 32: - case 24: - case 16: - case 12: - info->fix.visual = FB_VISUAL_TRUECOLOR; - break; - case 8: - if (s3c_fb_win_has_palette(win_no, 8)) - info->fix.visual = FB_VISUAL_PSEUDOCOLOR; - else - info->fix.visual = FB_VISUAL_TRUECOLOR; - break; - case 1: - info->fix.visual = FB_VISUAL_MONO01; - break; - default: - info->fix.visual = FB_VISUAL_PSEUDOCOLOR; - break; - } - - info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; - - /* disable the window whilst we update it */ - writel(0, regs + WINCON(win_no)); - - /* use window 0 as the basis for the lcd output timings */ - - if (win_no == 0) { - clkdiv = s3c_fb_calc_pixclk(sfb, var->pixclock); - - data = sfb->pdata->vidcon0; - data &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR); - - if (clkdiv > 1) - data |= VIDCON0_CLKVAL_F(clkdiv-1) | VIDCON0_CLKDIR; - else - data &= ~VIDCON0_CLKDIR; /* 1:1 clock */ - - /* write the timing data to the panel */ - - data |= VIDCON0_ENVID | VIDCON0_ENVID_F; - writel(data, regs + VIDCON0); - - data = VIDTCON0_VBPD(var->upper_margin - 1) | - VIDTCON0_VFPD(var->lower_margin - 1) | - VIDTCON0_VSPW(var->vsync_len - 1); - - writel(data, regs + VIDTCON0); - - data = VIDTCON1_HBPD(var->left_margin - 1) | - VIDTCON1_HFPD(var->right_margin - 1) | - VIDTCON1_HSPW(var->hsync_len - 1); - - writel(data, regs + VIDTCON1); - - data = VIDTCON2_LINEVAL(var->yres - 1) | - VIDTCON2_HOZVAL(var->xres - 1); - writel(data, regs + VIDTCON2); - } - - /* write the buffer address */ - - writel(info->fix.smem_start, regs + VIDW_BUF_START(win_no)); - - data = info->fix.smem_start + info->fix.line_length * var->yres; - writel(data, regs + VIDW_BUF_END(win_no)); - - pagewidth = (var->xres * var->bits_per_pixel) >> 3; - data = VIDW_BUF_SIZE_OFFSET(info->fix.line_length - pagewidth) | - VIDW_BUF_SIZE_PAGEWIDTH(pagewidth); - writel(data, regs + VIDW_BUF_SIZE(win_no)); - - /* write 'OSD' registers to control position of framebuffer */ - - data = VIDOSDxA_TOPLEFT_X(0) | VIDOSDxA_TOPLEFT_Y(0); - writel(data, regs + VIDOSD_A(win_no)); - - data = VIDOSDxB_BOTRIGHT_X(s3c_fb_align_word(var->bits_per_pixel, - var->xres - 1)) | - VIDOSDxB_BOTRIGHT_Y(var->yres - 1); - - writel(data, regs + VIDOSD_B(win_no)); - - data = var->xres * var->yres; - - osdc_data = VIDISD14C_ALPHA1_R(0xf) | - VIDISD14C_ALPHA1_G(0xf) | - VIDISD14C_ALPHA1_B(0xf); - - if (s3c_fb_has_osd_d(win_no)) { - writel(data, regs + VIDOSD_D(win_no)); - writel(osdc_data, regs + VIDOSD_C(win_no)); - } else - writel(data, regs + VIDOSD_C(win_no)); - - data = WINCONx_ENWIN; - - /* note, since we have to round up the bits-per-pixel, we end up - * relying on the bitfield information for r/g/b/a to work out - * exactly which mode of operation is intended. */ - - switch (var->bits_per_pixel) { - case 1: - data |= WINCON0_BPPMODE_1BPP; - data |= WINCONx_BITSWP; - data |= WINCONx_BURSTLEN_4WORD; - break; - case 2: - data |= WINCON0_BPPMODE_2BPP; - data |= WINCONx_BITSWP; - data |= WINCONx_BURSTLEN_8WORD; - break; - case 4: - data |= WINCON0_BPPMODE_4BPP; - data |= WINCONx_BITSWP; - data |= WINCONx_BURSTLEN_8WORD; - break; - case 8: - if (var->transp.length != 0) - data |= WINCON1_BPPMODE_8BPP_1232; - else - data |= WINCON0_BPPMODE_8BPP_PALETTE; - data |= WINCONx_BURSTLEN_8WORD; - data |= WINCONx_BYTSWP; - break; - case 16: - if (var->transp.length != 0) - data |= WINCON1_BPPMODE_16BPP_A1555; - else - data |= WINCON0_BPPMODE_16BPP_565; - data |= WINCONx_HAWSWP; - data |= WINCONx_BURSTLEN_16WORD; - break; - case 24: - case 32: - if (var->red.length == 6) { - if (var->transp.length != 0) - data |= WINCON1_BPPMODE_19BPP_A1666; - else - data |= WINCON1_BPPMODE_18BPP_666; - } else if (var->transp.length == 1) - data |= WINCON1_BPPMODE_25BPP_A1888 - | WINCON1_BLD_PIX; - else if (var->transp.length == 4) - data |= WINCON1_BPPMODE_28BPP_A4888 - | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; - else - data |= WINCON0_BPPMODE_24BPP_888; - - data |= WINCONx_BURSTLEN_16WORD; - break; - } - - /* It has no color key control register for window0 */ - if (win_no > 0) { - u32 keycon0_data = 0, keycon1_data = 0; - - keycon0_data = ~(WxKEYCON0_KEYBL_EN | - WxKEYCON0_KEYEN_F | - WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0); - - keycon1_data = WxKEYCON1_COLVAL(0xffffff); - - writel(keycon0_data, regs + WxKEYCONy(win_no-1, 0)); - writel(keycon1_data, regs + WxKEYCONy(win_no-1, 1)); - } - - writel(data, regs + WINCON(win_no)); - writel(0x0, regs + WINxMAP(win_no)); - - return 0; -} - -/** - * s3c_fb_update_palette() - set or schedule a palette update. - * @sfb: The hardware information. - * @win: The window being updated. - * @reg: The palette index being changed. - * @value: The computed palette value. - * - * Change the value of a palette register, either by directly writing to - * the palette (this requires the palette RAM to be disconnected from the - * hardware whilst this is in progress) or schedule the update for later. - * - * At the moment, since we have no VSYNC interrupt support, we simply set - * the palette entry directly. - */ -static void s3c_fb_update_palette(struct s3c_fb *sfb, - struct s3c_fb_win *win, - unsigned int reg, - u32 value) -{ - void __iomem *palreg; - u32 palcon; - - palreg = sfb->regs + s3c_fb_pal_reg(win->index, reg); - - dev_dbg(sfb->dev, "%s: win %d, reg %d (%p): %08x\n", - __func__, win->index, reg, palreg, value); - - win->palette_buffer[reg] = value; - - palcon = readl(sfb->regs + WPALCON); - writel(palcon | WPALCON_PAL_UPDATE, sfb->regs + WPALCON); - - if (s3c_fb_pal_is16(win->index)) - writew(value, palreg); - else - writel(value, palreg); - - writel(palcon, sfb->regs + WPALCON); -} - -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 = __devexit_p(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"); |