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authorTomi Valkeinen <tomi.valkeinen@ti.com>2014-02-13 15:31:38 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2014-04-17 08:10:19 +0300
commitf7018c21350204c4cf628462f229d44d03545254 (patch)
tree408787177164cf51cc06f7aabdb04fcff8d2b6aa /drivers/video/gbefb.c
parentc26ef3eb3c11274bad1b64498d0a134f85755250 (diff)
downloadop-kernel-dev-f7018c21350204c4cf628462f229d44d03545254.zip
op-kernel-dev-f7018c21350204c4cf628462f229d44d03545254.tar.gz
video: move fbdev to drivers/video/fbdev
The drivers/video directory is a mess. It contains generic video related files, directories for backlight, console, linux logo, lots of fbdev device drivers, fbdev framework files. Make some order into the chaos by creating drivers/video/fbdev directory, and move all fbdev related files there. No functionality is changed, although I guess it is possible that some subtle Makefile build order related issue could be created by this patch. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Rob Clark <robdclark@gmail.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/video/gbefb.c')
-rw-r--r--drivers/video/gbefb.c1309
1 files changed, 0 insertions, 1309 deletions
diff --git a/drivers/video/gbefb.c b/drivers/video/gbefb.c
deleted file mode 100644
index 3ec65a8..0000000
--- a/drivers/video/gbefb.c
+++ /dev/null
@@ -1,1309 +0,0 @@
-/*
- * SGI GBE frame buffer driver
- *
- * Copyright (C) 1999 Silicon Graphics, Inc. - Jeffrey Newquist
- * Copyright (C) 2002 Vivien Chappelier <vivien.chappelier@linux-mips.org>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- */
-
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <linux/errno.h>
-#include <linux/gfp.h>
-#include <linux/fb.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/io.h>
-
-#ifdef CONFIG_X86
-#include <asm/mtrr.h>
-#endif
-#ifdef CONFIG_MIPS
-#include <asm/addrspace.h>
-#endif
-#include <asm/byteorder.h>
-#include <asm/tlbflush.h>
-
-#include <video/gbe.h>
-
-static struct sgi_gbe *gbe;
-
-struct gbefb_par {
- struct fb_var_screeninfo var;
- struct gbe_timing_info timing;
- int valid;
-};
-
-#ifdef CONFIG_SGI_IP32
-#define GBE_BASE 0x16000000 /* SGI O2 */
-#endif
-
-/* macro for fastest write-though access to the framebuffer */
-#ifdef CONFIG_MIPS
-#ifdef CONFIG_CPU_R10000
-#define pgprot_fb(_prot) (((_prot) & (~_CACHE_MASK)) | _CACHE_UNCACHED_ACCELERATED)
-#else
-#define pgprot_fb(_prot) (((_prot) & (~_CACHE_MASK)) | _CACHE_CACHABLE_NO_WA)
-#endif
-#endif
-#ifdef CONFIG_X86
-#define pgprot_fb(_prot) ((_prot) | _PAGE_PCD)
-#endif
-
-/*
- * RAM we reserve for the frame buffer. This defines the maximum screen
- * size
- */
-#if CONFIG_FB_GBE_MEM > 8
-#error GBE Framebuffer cannot use more than 8MB of memory
-#endif
-
-#define TILE_SHIFT 16
-#define TILE_SIZE (1 << TILE_SHIFT)
-#define TILE_MASK (TILE_SIZE - 1)
-
-static unsigned int gbe_mem_size = CONFIG_FB_GBE_MEM * 1024*1024;
-static void *gbe_mem;
-static dma_addr_t gbe_dma_addr;
-static unsigned long gbe_mem_phys;
-
-static struct {
- uint16_t *cpu;
- dma_addr_t dma;
-} gbe_tiles;
-
-static int gbe_revision;
-
-static int ypan, ywrap;
-
-static uint32_t pseudo_palette[16];
-static uint32_t gbe_cmap[256];
-static int gbe_turned_on; /* 0 turned off, 1 turned on */
-
-static char *mode_option = NULL;
-
-/* default CRT mode */
-static struct fb_var_screeninfo default_var_CRT = {
- /* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
- .xres = 640,
- .yres = 480,
- .xres_virtual = 640,
- .yres_virtual = 480,
- .xoffset = 0,
- .yoffset = 0,
- .bits_per_pixel = 8,
- .grayscale = 0,
- .red = { 0, 8, 0 },
- .green = { 0, 8, 0 },
- .blue = { 0, 8, 0 },
- .transp = { 0, 0, 0 },
- .nonstd = 0,
- .activate = 0,
- .height = -1,
- .width = -1,
- .accel_flags = 0,
- .pixclock = 39722, /* picoseconds */
- .left_margin = 48,
- .right_margin = 16,
- .upper_margin = 33,
- .lower_margin = 10,
- .hsync_len = 96,
- .vsync_len = 2,
- .sync = 0,
- .vmode = FB_VMODE_NONINTERLACED,
-};
-
-/* default LCD mode */
-static struct fb_var_screeninfo default_var_LCD = {
- /* 1600x1024, 8 bpp */
- .xres = 1600,
- .yres = 1024,
- .xres_virtual = 1600,
- .yres_virtual = 1024,
- .xoffset = 0,
- .yoffset = 0,
- .bits_per_pixel = 8,
- .grayscale = 0,
- .red = { 0, 8, 0 },
- .green = { 0, 8, 0 },
- .blue = { 0, 8, 0 },
- .transp = { 0, 0, 0 },
- .nonstd = 0,
- .activate = 0,
- .height = -1,
- .width = -1,
- .accel_flags = 0,
- .pixclock = 9353,
- .left_margin = 20,
- .right_margin = 30,
- .upper_margin = 37,
- .lower_margin = 3,
- .hsync_len = 20,
- .vsync_len = 3,
- .sync = 0,
- .vmode = FB_VMODE_NONINTERLACED
-};
-
-/* default modedb mode */
-/* 640x480, 60 Hz, Non-Interlaced (25.172 MHz dotclock) */
-static struct fb_videomode default_mode_CRT = {
- .refresh = 60,
- .xres = 640,
- .yres = 480,
- .pixclock = 39722,
- .left_margin = 48,
- .right_margin = 16,
- .upper_margin = 33,
- .lower_margin = 10,
- .hsync_len = 96,
- .vsync_len = 2,
- .sync = 0,
- .vmode = FB_VMODE_NONINTERLACED,
-};
-/* 1600x1024 SGI flatpanel 1600sw */
-static struct fb_videomode default_mode_LCD = {
- /* 1600x1024, 8 bpp */
- .xres = 1600,
- .yres = 1024,
- .pixclock = 9353,
- .left_margin = 20,
- .right_margin = 30,
- .upper_margin = 37,
- .lower_margin = 3,
- .hsync_len = 20,
- .vsync_len = 3,
- .vmode = FB_VMODE_NONINTERLACED,
-};
-
-static struct fb_videomode *default_mode = &default_mode_CRT;
-static struct fb_var_screeninfo *default_var = &default_var_CRT;
-
-static int flat_panel_enabled = 0;
-
-static void gbe_reset(void)
-{
- /* Turn on dotclock PLL */
- gbe->ctrlstat = 0x300aa000;
-}
-
-
-/*
- * Function: gbe_turn_off
- * Parameters: (None)
- * Description: This should turn off the monitor and gbe. This is used
- * when switching between the serial console and the graphics
- * console.
- */
-
-static void gbe_turn_off(void)
-{
- int i;
- unsigned int val, x, y, vpixen_off;
-
- gbe_turned_on = 0;
-
- /* check if pixel counter is on */
- val = gbe->vt_xy;
- if (GET_GBE_FIELD(VT_XY, FREEZE, val) == 1)
- return;
-
- /* turn off DMA */
- val = gbe->ovr_control;
- SET_GBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, val, 0);
- gbe->ovr_control = val;
- udelay(1000);
- val = gbe->frm_control;
- SET_GBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, val, 0);
- gbe->frm_control = val;
- udelay(1000);
- val = gbe->did_control;
- SET_GBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, val, 0);
- gbe->did_control = val;
- udelay(1000);
-
- /* We have to wait through two vertical retrace periods before
- * the pixel DMA is turned off for sure. */
- for (i = 0; i < 10000; i++) {
- val = gbe->frm_inhwctrl;
- if (GET_GBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, val)) {
- udelay(10);
- } else {
- val = gbe->ovr_inhwctrl;
- if (GET_GBE_FIELD(OVR_INHWCTRL, OVR_DMA_ENABLE, val)) {
- udelay(10);
- } else {
- val = gbe->did_inhwctrl;
- if (GET_GBE_FIELD(DID_INHWCTRL, DID_DMA_ENABLE, val)) {
- udelay(10);
- } else
- break;
- }
- }
- }
- if (i == 10000)
- printk(KERN_ERR "gbefb: turn off DMA timed out\n");
-
- /* wait for vpixen_off */
- val = gbe->vt_vpixen;
- vpixen_off = GET_GBE_FIELD(VT_VPIXEN, VPIXEN_OFF, val);
-
- for (i = 0; i < 100000; i++) {
- val = gbe->vt_xy;
- x = GET_GBE_FIELD(VT_XY, X, val);
- y = GET_GBE_FIELD(VT_XY, Y, val);
- if (y < vpixen_off)
- break;
- udelay(1);
- }
- if (i == 100000)
- printk(KERN_ERR
- "gbefb: wait for vpixen_off timed out\n");
- for (i = 0; i < 10000; i++) {
- val = gbe->vt_xy;
- x = GET_GBE_FIELD(VT_XY, X, val);
- y = GET_GBE_FIELD(VT_XY, Y, val);
- if (y > vpixen_off)
- break;
- udelay(1);
- }
- if (i == 10000)
- printk(KERN_ERR "gbefb: wait for vpixen_off timed out\n");
-
- /* turn off pixel counter */
- val = 0;
- SET_GBE_FIELD(VT_XY, FREEZE, val, 1);
- gbe->vt_xy = val;
- udelay(10000);
- for (i = 0; i < 10000; i++) {
- val = gbe->vt_xy;
- if (GET_GBE_FIELD(VT_XY, FREEZE, val) != 1)
- udelay(10);
- else
- break;
- }
- if (i == 10000)
- printk(KERN_ERR "gbefb: turn off pixel clock timed out\n");
-
- /* turn off dot clock */
- val = gbe->dotclock;
- SET_GBE_FIELD(DOTCLK, RUN, val, 0);
- gbe->dotclock = val;
- udelay(10000);
- for (i = 0; i < 10000; i++) {
- val = gbe->dotclock;
- if (GET_GBE_FIELD(DOTCLK, RUN, val))
- udelay(10);
- else
- break;
- }
- if (i == 10000)
- printk(KERN_ERR "gbefb: turn off dotclock timed out\n");
-
- /* reset the frame DMA FIFO */
- val = gbe->frm_size_tile;
- SET_GBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, val, 1);
- gbe->frm_size_tile = val;
- SET_GBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, val, 0);
- gbe->frm_size_tile = val;
-}
-
-static void gbe_turn_on(void)
-{
- unsigned int val, i;
-
- /*
- * Check if pixel counter is off, for unknown reason this
- * code hangs Visual Workstations
- */
- if (gbe_revision < 2) {
- val = gbe->vt_xy;
- if (GET_GBE_FIELD(VT_XY, FREEZE, val) == 0)
- return;
- }
-
- /* turn on dot clock */
- val = gbe->dotclock;
- SET_GBE_FIELD(DOTCLK, RUN, val, 1);
- gbe->dotclock = val;
- udelay(10000);
- for (i = 0; i < 10000; i++) {
- val = gbe->dotclock;
- if (GET_GBE_FIELD(DOTCLK, RUN, val) != 1)
- udelay(10);
- else
- break;
- }
- if (i == 10000)
- printk(KERN_ERR "gbefb: turn on dotclock timed out\n");
-
- /* turn on pixel counter */
- val = 0;
- SET_GBE_FIELD(VT_XY, FREEZE, val, 0);
- gbe->vt_xy = val;
- udelay(10000);
- for (i = 0; i < 10000; i++) {
- val = gbe->vt_xy;
- if (GET_GBE_FIELD(VT_XY, FREEZE, val))
- udelay(10);
- else
- break;
- }
- if (i == 10000)
- printk(KERN_ERR "gbefb: turn on pixel clock timed out\n");
-
- /* turn on DMA */
- val = gbe->frm_control;
- SET_GBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, val, 1);
- gbe->frm_control = val;
- udelay(1000);
- for (i = 0; i < 10000; i++) {
- val = gbe->frm_inhwctrl;
- if (GET_GBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, val) != 1)
- udelay(10);
- else
- break;
- }
- if (i == 10000)
- printk(KERN_ERR "gbefb: turn on DMA timed out\n");
-
- gbe_turned_on = 1;
-}
-
-static void gbe_loadcmap(void)
-{
- int i, j;
-
- for (i = 0; i < 256; i++) {
- for (j = 0; j < 1000 && gbe->cm_fifo >= 63; j++)
- udelay(10);
- if (j == 1000)
- printk(KERN_ERR "gbefb: cmap FIFO timeout\n");
-
- gbe->cmap[i] = gbe_cmap[i];
- }
-}
-
-/*
- * Blank the display.
- */
-static int gbefb_blank(int blank, struct fb_info *info)
-{
- /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
- switch (blank) {
- case FB_BLANK_UNBLANK: /* unblank */
- gbe_turn_on();
- gbe_loadcmap();
- break;
-
- case FB_BLANK_NORMAL: /* blank */
- gbe_turn_off();
- break;
-
- default:
- /* Nothing */
- break;
- }
- return 0;
-}
-
-/*
- * Setup flatpanel related registers.
- */
-static void gbefb_setup_flatpanel(struct gbe_timing_info *timing)
-{
- int fp_wid, fp_hgt, fp_vbs, fp_vbe;
- u32 outputVal = 0;
-
- SET_GBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
- (timing->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
- SET_GBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
- (timing->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
- gbe->vt_flags = outputVal;
-
- /* Turn on the flat panel */
- fp_wid = 1600;
- fp_hgt = 1024;
- fp_vbs = 0;
- fp_vbe = 1600;
- timing->pll_m = 4;
- timing->pll_n = 1;
- timing->pll_p = 0;
-
- outputVal = 0;
- SET_GBE_FIELD(FP_DE, ON, outputVal, fp_vbs);
- SET_GBE_FIELD(FP_DE, OFF, outputVal, fp_vbe);
- gbe->fp_de = outputVal;
- outputVal = 0;
- SET_GBE_FIELD(FP_HDRV, OFF, outputVal, fp_wid);
- gbe->fp_hdrv = outputVal;
- outputVal = 0;
- SET_GBE_FIELD(FP_VDRV, ON, outputVal, 1);
- SET_GBE_FIELD(FP_VDRV, OFF, outputVal, fp_hgt + 1);
- gbe->fp_vdrv = outputVal;
-}
-
-struct gbe_pll_info {
- int clock_rate;
- int fvco_min;
- int fvco_max;
-};
-
-static struct gbe_pll_info gbe_pll_table[2] = {
- { 20, 80, 220 },
- { 27, 80, 220 },
-};
-
-static int compute_gbe_timing(struct fb_var_screeninfo *var,
- struct gbe_timing_info *timing)
-{
- int pll_m, pll_n, pll_p, error, best_m, best_n, best_p, best_error;
- int pixclock;
- struct gbe_pll_info *gbe_pll;
-
- if (gbe_revision < 2)
- gbe_pll = &gbe_pll_table[0];
- else
- gbe_pll = &gbe_pll_table[1];
-
- /* Determine valid resolution and timing
- * GBE crystal runs at 20Mhz or 27Mhz
- * pll_m, pll_n, pll_p define the following frequencies
- * fvco = pll_m * 20Mhz / pll_n
- * fout = fvco / (2**pll_p) */
- best_error = 1000000000;
- best_n = best_m = best_p = 0;
- for (pll_p = 0; pll_p < 4; pll_p++)
- for (pll_m = 1; pll_m < 256; pll_m++)
- for (pll_n = 1; pll_n < 64; pll_n++) {
- pixclock = (1000000 / gbe_pll->clock_rate) *
- (pll_n << pll_p) / pll_m;
-
- error = var->pixclock - pixclock;
-
- if (error < 0)
- error = -error;
-
- if (error < best_error &&
- pll_m / pll_n >
- gbe_pll->fvco_min / gbe_pll->clock_rate &&
- pll_m / pll_n <
- gbe_pll->fvco_max / gbe_pll->clock_rate) {
- best_error = error;
- best_m = pll_m;
- best_n = pll_n;
- best_p = pll_p;
- }
- }
-
- if (!best_n || !best_m)
- return -EINVAL; /* Resolution to high */
-
- pixclock = (1000000 / gbe_pll->clock_rate) *
- (best_n << best_p) / best_m;
-
- /* set video timing information */
- if (timing) {
- timing->width = var->xres;
- timing->height = var->yres;
- timing->pll_m = best_m;
- timing->pll_n = best_n;
- timing->pll_p = best_p;
- timing->cfreq = gbe_pll->clock_rate * 1000 * timing->pll_m /
- (timing->pll_n << timing->pll_p);
- timing->htotal = var->left_margin + var->xres +
- var->right_margin + var->hsync_len;
- timing->vtotal = var->upper_margin + var->yres +
- var->lower_margin + var->vsync_len;
- timing->fields_sec = 1000 * timing->cfreq / timing->htotal *
- 1000 / timing->vtotal;
- timing->hblank_start = var->xres;
- timing->vblank_start = var->yres;
- timing->hblank_end = timing->htotal;
- timing->hsync_start = var->xres + var->right_margin + 1;
- timing->hsync_end = timing->hsync_start + var->hsync_len;
- timing->vblank_end = timing->vtotal;
- timing->vsync_start = var->yres + var->lower_margin + 1;
- timing->vsync_end = timing->vsync_start + var->vsync_len;
- }
-
- return pixclock;
-}
-
-static void gbe_set_timing_info(struct gbe_timing_info *timing)
-{
- int temp;
- unsigned int val;
-
- /* setup dot clock PLL */
- val = 0;
- SET_GBE_FIELD(DOTCLK, M, val, timing->pll_m - 1);
- SET_GBE_FIELD(DOTCLK, N, val, timing->pll_n - 1);
- SET_GBE_FIELD(DOTCLK, P, val, timing->pll_p);
- SET_GBE_FIELD(DOTCLK, RUN, val, 0); /* do not start yet */
- gbe->dotclock = val;
- udelay(10000);
-
- /* setup pixel counter */
- val = 0;
- SET_GBE_FIELD(VT_XYMAX, MAXX, val, timing->htotal);
- SET_GBE_FIELD(VT_XYMAX, MAXY, val, timing->vtotal);
- gbe->vt_xymax = val;
-
- /* setup video timing signals */
- val = 0;
- SET_GBE_FIELD(VT_VSYNC, VSYNC_ON, val, timing->vsync_start);
- SET_GBE_FIELD(VT_VSYNC, VSYNC_OFF, val, timing->vsync_end);
- gbe->vt_vsync = val;
- val = 0;
- SET_GBE_FIELD(VT_HSYNC, HSYNC_ON, val, timing->hsync_start);
- SET_GBE_FIELD(VT_HSYNC, HSYNC_OFF, val, timing->hsync_end);
- gbe->vt_hsync = val;
- val = 0;
- SET_GBE_FIELD(VT_VBLANK, VBLANK_ON, val, timing->vblank_start);
- SET_GBE_FIELD(VT_VBLANK, VBLANK_OFF, val, timing->vblank_end);
- gbe->vt_vblank = val;
- val = 0;
- SET_GBE_FIELD(VT_HBLANK, HBLANK_ON, val,
- timing->hblank_start - 5);
- SET_GBE_FIELD(VT_HBLANK, HBLANK_OFF, val,
- timing->hblank_end - 3);
- gbe->vt_hblank = val;
-
- /* setup internal timing signals */
- val = 0;
- SET_GBE_FIELD(VT_VCMAP, VCMAP_ON, val, timing->vblank_start);
- SET_GBE_FIELD(VT_VCMAP, VCMAP_OFF, val, timing->vblank_end);
- gbe->vt_vcmap = val;
- val = 0;
- SET_GBE_FIELD(VT_HCMAP, HCMAP_ON, val, timing->hblank_start);
- SET_GBE_FIELD(VT_HCMAP, HCMAP_OFF, val, timing->hblank_end);
- gbe->vt_hcmap = val;
-
- val = 0;
- temp = timing->vblank_start - timing->vblank_end - 1;
- if (temp > 0)
- temp = -temp;
-
- if (flat_panel_enabled)
- gbefb_setup_flatpanel(timing);
-
- SET_GBE_FIELD(DID_START_XY, DID_STARTY, val, (u32) temp);
- if (timing->hblank_end >= 20)
- SET_GBE_FIELD(DID_START_XY, DID_STARTX, val,
- timing->hblank_end - 20);
- else
- SET_GBE_FIELD(DID_START_XY, DID_STARTX, val,
- timing->htotal - (20 - timing->hblank_end));
- gbe->did_start_xy = val;
-
- val = 0;
- SET_GBE_FIELD(CRS_START_XY, CRS_STARTY, val, (u32) (temp + 1));
- if (timing->hblank_end >= GBE_CRS_MAGIC)
- SET_GBE_FIELD(CRS_START_XY, CRS_STARTX, val,
- timing->hblank_end - GBE_CRS_MAGIC);
- else
- SET_GBE_FIELD(CRS_START_XY, CRS_STARTX, val,
- timing->htotal - (GBE_CRS_MAGIC -
- timing->hblank_end));
- gbe->crs_start_xy = val;
-
- val = 0;
- SET_GBE_FIELD(VC_START_XY, VC_STARTY, val, (u32) temp);
- SET_GBE_FIELD(VC_START_XY, VC_STARTX, val, timing->hblank_end - 4);
- gbe->vc_start_xy = val;
-
- val = 0;
- temp = timing->hblank_end - GBE_PIXEN_MAGIC_ON;
- if (temp < 0)
- temp += timing->htotal; /* allow blank to wrap around */
-
- SET_GBE_FIELD(VT_HPIXEN, HPIXEN_ON, val, temp);
- SET_GBE_FIELD(VT_HPIXEN, HPIXEN_OFF, val,
- ((temp + timing->width -
- GBE_PIXEN_MAGIC_OFF) % timing->htotal));
- gbe->vt_hpixen = val;
-
- val = 0;
- SET_GBE_FIELD(VT_VPIXEN, VPIXEN_ON, val, timing->vblank_end);
- SET_GBE_FIELD(VT_VPIXEN, VPIXEN_OFF, val, timing->vblank_start);
- gbe->vt_vpixen = val;
-
- /* turn off sync on green */
- val = 0;
- SET_GBE_FIELD(VT_FLAGS, SYNC_LOW, val, 1);
- gbe->vt_flags = val;
-}
-
-/*
- * Set the hardware according to 'par'.
- */
-
-static int gbefb_set_par(struct fb_info *info)
-{
- int i;
- unsigned int val;
- int wholeTilesX, partTilesX, maxPixelsPerTileX;
- int height_pix;
- int xpmax, ypmax; /* Monitor resolution */
- int bytesPerPixel; /* Bytes per pixel */
- struct gbefb_par *par = (struct gbefb_par *) info->par;
-
- compute_gbe_timing(&info->var, &par->timing);
-
- bytesPerPixel = info->var.bits_per_pixel / 8;
- info->fix.line_length = info->var.xres_virtual * bytesPerPixel;
- xpmax = par->timing.width;
- ypmax = par->timing.height;
-
- /* turn off GBE */
- gbe_turn_off();
-
- /* set timing info */
- gbe_set_timing_info(&par->timing);
-
- /* initialize DIDs */
- val = 0;
- switch (bytesPerPixel) {
- case 1:
- SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_I8);
- info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
- break;
- case 2:
- SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_ARGB5);
- info->fix.visual = FB_VISUAL_TRUECOLOR;
- break;
- case 4:
- SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_RGB8);
- info->fix.visual = FB_VISUAL_TRUECOLOR;
- break;
- }
- SET_GBE_FIELD(WID, BUF, val, GBE_BMODE_BOTH);
-
- for (i = 0; i < 32; i++)
- gbe->mode_regs[i] = val;
-
- /* Initialize interrupts */
- gbe->vt_intr01 = 0xffffffff;
- gbe->vt_intr23 = 0xffffffff;
-
- /* HACK:
- The GBE hardware uses a tiled memory to screen mapping. Tiles are
- blocks of 512x128, 256x128 or 128x128 pixels, respectively for 8bit,
- 16bit and 32 bit modes (64 kB). They cover the screen with partial
- tiles on the right and/or bottom of the screen if needed.
- For example in 640x480 8 bit mode the mapping is:
-
- <-------- 640 ----->
- <---- 512 ----><128|384 offscreen>
- ^ ^
- | 128 [tile 0] [tile 1]
- | v
- ^
- 4 128 [tile 2] [tile 3]
- 8 v
- 0 ^
- 128 [tile 4] [tile 5]
- | v
- | ^
- v 96 [tile 6] [tile 7]
- 32 offscreen
-
- Tiles have the advantage that they can be allocated individually in
- memory. However, this mapping is not linear at all, which is not
- really convenient. In order to support linear addressing, the GBE
- DMA hardware is fooled into thinking the screen is only one tile
- large and but has a greater height, so that the DMA transfer covers
- the same region.
- Tiles are still allocated as independent chunks of 64KB of
- continuous physical memory and remapped so that the kernel sees the
- framebuffer as a continuous virtual memory. The GBE tile table is
- set up so that each tile references one of these 64k blocks:
-
- GBE -> tile list framebuffer TLB <------------ CPU
- [ tile 0 ] -> [ 64KB ] <- [ 16x 4KB page entries ] ^
- ... ... ... linear virtual FB
- [ tile n ] -> [ 64KB ] <- [ 16x 4KB page entries ] v
-
-
- The GBE hardware is then told that the buffer is 512*tweaked_height,
- with tweaked_height = real_width*real_height/pixels_per_tile.
- Thus the GBE hardware will scan the first tile, filing the first 64k
- covered region of the screen, and then will proceed to the next
- tile, until the whole screen is covered.
-
- Here is what would happen at 640x480 8bit:
-
- normal tiling linear
- ^ 11111111111111112222 11111111111111111111 ^
- 128 11111111111111112222 11111111111111111111 102 lines
- 11111111111111112222 11111111111111111111 v
- V 11111111111111112222 11111111222222222222
- 33333333333333334444 22222222222222222222
- 33333333333333334444 22222222222222222222
- < 512 > < 256 > 102*640+256 = 64k
-
- NOTE: The only mode for which this is not working is 800x600 8bit,
- as 800*600/512 = 937.5 which is not integer and thus causes
- flickering.
- I guess this is not so important as one can use 640x480 8bit or
- 800x600 16bit anyway.
- */
-
- /* Tell gbe about the tiles table location */
- /* tile_ptr -> [ tile 1 ] -> FB mem */
- /* [ tile 2 ] -> FB mem */
- /* ... */
- val = 0;
- SET_GBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, val, gbe_tiles.dma >> 9);
- SET_GBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, val, 0); /* do not start */
- SET_GBE_FIELD(FRM_CONTROL, FRM_LINEAR, val, 0);
- gbe->frm_control = val;
-
- maxPixelsPerTileX = 512 / bytesPerPixel;
- wholeTilesX = 1;
- partTilesX = 0;
-
- /* Initialize the framebuffer */
- val = 0;
- SET_GBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, val, wholeTilesX);
- SET_GBE_FIELD(FRM_SIZE_TILE, FRM_RHS, val, partTilesX);
-
- switch (bytesPerPixel) {
- case 1:
- SET_GBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, val,
- GBE_FRM_DEPTH_8);
- break;
- case 2:
- SET_GBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, val,
- GBE_FRM_DEPTH_16);
- break;
- case 4:
- SET_GBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, val,
- GBE_FRM_DEPTH_32);
- break;
- }
- gbe->frm_size_tile = val;
-
- /* compute tweaked height */
- height_pix = xpmax * ypmax / maxPixelsPerTileX;
-
- val = 0;
- SET_GBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, val, height_pix);
- gbe->frm_size_pixel = val;
-
- /* turn off DID and overlay DMA */
- gbe->did_control = 0;
- gbe->ovr_width_tile = 0;
-
- /* Turn off mouse cursor */
- gbe->crs_ctl = 0;
-
- /* Turn on GBE */
- gbe_turn_on();
-
- /* Initialize the gamma map */
- udelay(10);
- for (i = 0; i < 256; i++)
- gbe->gmap[i] = (i << 24) | (i << 16) | (i << 8);
-
- /* Initialize the color map */
- for (i = 0; i < 256; i++)
- gbe_cmap[i] = (i << 8) | (i << 16) | (i << 24);
-
- gbe_loadcmap();
-
- return 0;
-}
-
-static void gbefb_encode_fix(struct fb_fix_screeninfo *fix,
- struct fb_var_screeninfo *var)
-{
- memset(fix, 0, sizeof(struct fb_fix_screeninfo));
- strcpy(fix->id, "SGI GBE");
- fix->smem_start = (unsigned long) gbe_mem;
- fix->smem_len = gbe_mem_size;
- fix->type = FB_TYPE_PACKED_PIXELS;
- fix->type_aux = 0;
- fix->accel = FB_ACCEL_NONE;
- switch (var->bits_per_pixel) {
- case 8:
- fix->visual = FB_VISUAL_PSEUDOCOLOR;
- break;
- default:
- fix->visual = FB_VISUAL_TRUECOLOR;
- break;
- }
- fix->ywrapstep = 0;
- fix->xpanstep = 0;
- fix->ypanstep = 0;
- fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
- fix->mmio_start = GBE_BASE;
- fix->mmio_len = sizeof(struct sgi_gbe);
-}
-
-/*
- * Set a single color register. The values supplied are already
- * rounded down to the hardware's capabilities (according to the
- * entries in the var structure). Return != 0 for invalid regno.
- */
-
-static int gbefb_setcolreg(unsigned regno, unsigned red, unsigned green,
- unsigned blue, unsigned transp,
- struct fb_info *info)
-{
- int i;
-
- if (regno > 255)
- return 1;
- red >>= 8;
- green >>= 8;
- blue >>= 8;
-
- if (info->var.bits_per_pixel <= 8) {
- gbe_cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
- if (gbe_turned_on) {
- /* wait for the color map FIFO to have a free entry */
- for (i = 0; i < 1000 && gbe->cm_fifo >= 63; i++)
- udelay(10);
- if (i == 1000) {
- printk(KERN_ERR "gbefb: cmap FIFO timeout\n");
- return 1;
- }
- gbe->cmap[regno] = gbe_cmap[regno];
- }
- } else if (regno < 16) {
- switch (info->var.bits_per_pixel) {
- case 15:
- case 16:
- red >>= 3;
- green >>= 3;
- blue >>= 3;
- pseudo_palette[regno] =
- (red << info->var.red.offset) |
- (green << info->var.green.offset) |
- (blue << info->var.blue.offset);
- break;
- case 32:
- pseudo_palette[regno] =
- (red << info->var.red.offset) |
- (green << info->var.green.offset) |
- (blue << info->var.blue.offset);
- break;
- }
- }
-
- return 0;
-}
-
-/*
- * Check video mode validity, eventually modify var to best match.
- */
-static int gbefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
-{
- unsigned int line_length;
- struct gbe_timing_info timing;
- int ret;
-
- /* Limit bpp to 8, 16, and 32 */
- if (var->bits_per_pixel <= 8)
- var->bits_per_pixel = 8;
- else if (var->bits_per_pixel <= 16)
- var->bits_per_pixel = 16;
- else if (var->bits_per_pixel <= 32)
- var->bits_per_pixel = 32;
- else
- return -EINVAL;
-
- /* Check the mode can be mapped linearly with the tile table trick. */
- /* This requires width x height x bytes/pixel be a multiple of 512 */
- if ((var->xres * var->yres * var->bits_per_pixel) & 4095)
- return -EINVAL;
-
- var->grayscale = 0; /* No grayscale for now */
-
- ret = compute_gbe_timing(var, &timing);
- var->pixclock = ret;
- if (ret < 0)
- return -EINVAL;
-
- /* Adjust virtual resolution, if necessary */
- if (var->xres > var->xres_virtual || (!ywrap && !ypan))
- var->xres_virtual = var->xres;
- if (var->yres > var->yres_virtual || (!ywrap && !ypan))
- var->yres_virtual = var->yres;
-
- if (var->vmode & FB_VMODE_CONUPDATE) {
- var->vmode |= FB_VMODE_YWRAP;
- var->xoffset = info->var.xoffset;
- var->yoffset = info->var.yoffset;
- }
-
- /* No grayscale for now */
- var->grayscale = 0;
-
- /* Memory limit */
- line_length = var->xres_virtual * var->bits_per_pixel / 8;
- if (line_length * var->yres_virtual > gbe_mem_size)
- return -ENOMEM; /* Virtual resolution too high */
-
- switch (var->bits_per_pixel) {
- case 8:
- var->red.offset = 0;
- var->red.length = 8;
- var->green.offset = 0;
- var->green.length = 8;
- var->blue.offset = 0;
- var->blue.length = 8;
- var->transp.offset = 0;
- var->transp.length = 0;
- break;
- case 16: /* RGB 1555 */
- var->red.offset = 10;
- var->red.length = 5;
- var->green.offset = 5;
- var->green.length = 5;
- var->blue.offset = 0;
- var->blue.length = 5;
- var->transp.offset = 0;
- var->transp.length = 0;
- break;
- case 32: /* RGB 8888 */
- var->red.offset = 24;
- var->red.length = 8;
- var->green.offset = 16;
- var->green.length = 8;
- var->blue.offset = 8;
- var->blue.length = 8;
- var->transp.offset = 0;
- var->transp.length = 8;
- break;
- }
- var->red.msb_right = 0;
- var->green.msb_right = 0;
- var->blue.msb_right = 0;
- var->transp.msb_right = 0;
-
- var->left_margin = timing.htotal - timing.hsync_end;
- var->right_margin = timing.hsync_start - timing.width;
- var->upper_margin = timing.vtotal - timing.vsync_end;
- var->lower_margin = timing.vsync_start - timing.height;
- var->hsync_len = timing.hsync_end - timing.hsync_start;
- var->vsync_len = timing.vsync_end - timing.vsync_start;
-
- return 0;
-}
-
-static int gbefb_mmap(struct fb_info *info,
- struct vm_area_struct *vma)
-{
- unsigned long size = vma->vm_end - vma->vm_start;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- unsigned long addr;
- unsigned long phys_addr, phys_size;
- u16 *tile;
-
- /* check range */
- if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
- return -EINVAL;
- if (size > gbe_mem_size)
- return -EINVAL;
- if (offset > gbe_mem_size - size)
- return -EINVAL;
-
- /* remap using the fastest write-through mode on architecture */
- /* try not polluting the cache when possible */
- pgprot_val(vma->vm_page_prot) =
- pgprot_fb(pgprot_val(vma->vm_page_prot));
-
- /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
-
- /* look for the starting tile */
- tile = &gbe_tiles.cpu[offset >> TILE_SHIFT];
- addr = vma->vm_start;
- offset &= TILE_MASK;
-
- /* remap each tile separately */
- do {
- phys_addr = (((unsigned long) (*tile)) << TILE_SHIFT) + offset;
- if ((offset + size) < TILE_SIZE)
- phys_size = size;
- else
- phys_size = TILE_SIZE - offset;
-
- if (remap_pfn_range(vma, addr, phys_addr >> PAGE_SHIFT,
- phys_size, vma->vm_page_prot))
- return -EAGAIN;
-
- offset = 0;
- size -= phys_size;
- addr += phys_size;
- tile++;
- } while (size);
-
- return 0;
-}
-
-static struct fb_ops gbefb_ops = {
- .owner = THIS_MODULE,
- .fb_check_var = gbefb_check_var,
- .fb_set_par = gbefb_set_par,
- .fb_setcolreg = gbefb_setcolreg,
- .fb_mmap = gbefb_mmap,
- .fb_blank = gbefb_blank,
- .fb_fillrect = cfb_fillrect,
- .fb_copyarea = cfb_copyarea,
- .fb_imageblit = cfb_imageblit,
-};
-
-/*
- * sysfs
- */
-
-static ssize_t gbefb_show_memsize(struct device *dev, struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", gbe_mem_size);
-}
-
-static DEVICE_ATTR(size, S_IRUGO, gbefb_show_memsize, NULL);
-
-static ssize_t gbefb_show_rev(struct device *device, struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", gbe_revision);
-}
-
-static DEVICE_ATTR(revision, S_IRUGO, gbefb_show_rev, NULL);
-
-static void gbefb_remove_sysfs(struct device *dev)
-{
- device_remove_file(dev, &dev_attr_size);
- device_remove_file(dev, &dev_attr_revision);
-}
-
-static void gbefb_create_sysfs(struct device *dev)
-{
- device_create_file(dev, &dev_attr_size);
- device_create_file(dev, &dev_attr_revision);
-}
-
-/*
- * Initialization
- */
-
-static int gbefb_setup(char *options)
-{
- char *this_opt;
-
- if (!options || !*options)
- return 0;
-
- while ((this_opt = strsep(&options, ",")) != NULL) {
- if (!strncmp(this_opt, "monitor:", 8)) {
- if (!strncmp(this_opt + 8, "crt", 3)) {
- flat_panel_enabled = 0;
- default_var = &default_var_CRT;
- default_mode = &default_mode_CRT;
- } else if (!strncmp(this_opt + 8, "1600sw", 6) ||
- !strncmp(this_opt + 8, "lcd", 3)) {
- flat_panel_enabled = 1;
- default_var = &default_var_LCD;
- default_mode = &default_mode_LCD;
- }
- } else if (!strncmp(this_opt, "mem:", 4)) {
- gbe_mem_size = memparse(this_opt + 4, &this_opt);
- if (gbe_mem_size > CONFIG_FB_GBE_MEM * 1024 * 1024)
- gbe_mem_size = CONFIG_FB_GBE_MEM * 1024 * 1024;
- if (gbe_mem_size < TILE_SIZE)
- gbe_mem_size = TILE_SIZE;
- } else
- mode_option = this_opt;
- }
- return 0;
-}
-
-static int gbefb_probe(struct platform_device *p_dev)
-{
- int i, ret = 0;
- struct fb_info *info;
- struct gbefb_par *par;
-#ifndef MODULE
- char *options = NULL;
-#endif
-
- info = framebuffer_alloc(sizeof(struct gbefb_par), &p_dev->dev);
- if (!info)
- return -ENOMEM;
-
-#ifndef MODULE
- if (fb_get_options("gbefb", &options)) {
- ret = -ENODEV;
- goto out_release_framebuffer;
- }
- gbefb_setup(options);
-#endif
-
- if (!request_mem_region(GBE_BASE, sizeof(struct sgi_gbe), "GBE")) {
- printk(KERN_ERR "gbefb: couldn't reserve mmio region\n");
- ret = -EBUSY;
- goto out_release_framebuffer;
- }
-
- gbe = (struct sgi_gbe *) devm_ioremap(&p_dev->dev, GBE_BASE,
- sizeof(struct sgi_gbe));
- if (!gbe) {
- printk(KERN_ERR "gbefb: couldn't map mmio region\n");
- ret = -ENXIO;
- goto out_release_mem_region;
- }
- gbe_revision = gbe->ctrlstat & 15;
-
- gbe_tiles.cpu =
- dma_alloc_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t),
- &gbe_tiles.dma, GFP_KERNEL);
- if (!gbe_tiles.cpu) {
- printk(KERN_ERR "gbefb: couldn't allocate tiles table\n");
- ret = -ENOMEM;
- goto out_release_mem_region;
- }
-
- if (gbe_mem_phys) {
- /* memory was allocated at boot time */
- gbe_mem = devm_ioremap_nocache(&p_dev->dev, gbe_mem_phys,
- gbe_mem_size);
- if (!gbe_mem) {
- printk(KERN_ERR "gbefb: couldn't map framebuffer\n");
- ret = -ENOMEM;
- goto out_tiles_free;
- }
-
- gbe_dma_addr = 0;
- } else {
- /* try to allocate memory with the classical allocator
- * this has high chance to fail on low memory machines */
- gbe_mem = dma_alloc_coherent(NULL, gbe_mem_size, &gbe_dma_addr,
- GFP_KERNEL);
- if (!gbe_mem) {
- printk(KERN_ERR "gbefb: couldn't allocate framebuffer memory\n");
- ret = -ENOMEM;
- goto out_tiles_free;
- }
-
- gbe_mem_phys = (unsigned long) gbe_dma_addr;
- }
-
-#ifdef CONFIG_X86
- mtrr_add(gbe_mem_phys, gbe_mem_size, MTRR_TYPE_WRCOMB, 1);
-#endif
-
- /* map framebuffer memory into tiles table */
- for (i = 0; i < (gbe_mem_size >> TILE_SHIFT); i++)
- gbe_tiles.cpu[i] = (gbe_mem_phys >> TILE_SHIFT) + i;
-
- info->fbops = &gbefb_ops;
- info->pseudo_palette = pseudo_palette;
- info->flags = FBINFO_DEFAULT;
- info->screen_base = gbe_mem;
- fb_alloc_cmap(&info->cmap, 256, 0);
-
- /* reset GBE */
- gbe_reset();
-
- par = info->par;
- /* turn on default video mode */
- if (fb_find_mode(&par->var, info, mode_option, NULL, 0,
- default_mode, 8) == 0)
- par->var = *default_var;
- info->var = par->var;
- gbefb_check_var(&par->var, info);
- gbefb_encode_fix(&info->fix, &info->var);
-
- if (register_framebuffer(info) < 0) {
- printk(KERN_ERR "gbefb: couldn't register framebuffer\n");
- ret = -ENXIO;
- goto out_gbe_unmap;
- }
-
- platform_set_drvdata(p_dev, info);
- gbefb_create_sysfs(&p_dev->dev);
-
- fb_info(info, "%s rev %d @ 0x%08x using %dkB memory\n",
- info->fix.id, gbe_revision, (unsigned)GBE_BASE,
- gbe_mem_size >> 10);
-
- return 0;
-
-out_gbe_unmap:
- if (gbe_dma_addr)
- dma_free_coherent(NULL, gbe_mem_size, gbe_mem, gbe_mem_phys);
-out_tiles_free:
- dma_free_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t),
- (void *)gbe_tiles.cpu, gbe_tiles.dma);
-out_release_mem_region:
- release_mem_region(GBE_BASE, sizeof(struct sgi_gbe));
-out_release_framebuffer:
- framebuffer_release(info);
-
- return ret;
-}
-
-static int gbefb_remove(struct platform_device* p_dev)
-{
- struct fb_info *info = platform_get_drvdata(p_dev);
-
- unregister_framebuffer(info);
- gbe_turn_off();
- if (gbe_dma_addr)
- dma_free_coherent(NULL, gbe_mem_size, gbe_mem, gbe_mem_phys);
- dma_free_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t),
- (void *)gbe_tiles.cpu, gbe_tiles.dma);
- release_mem_region(GBE_BASE, sizeof(struct sgi_gbe));
- gbefb_remove_sysfs(&p_dev->dev);
- framebuffer_release(info);
-
- return 0;
-}
-
-static struct platform_driver gbefb_driver = {
- .probe = gbefb_probe,
- .remove = gbefb_remove,
- .driver = {
- .name = "gbefb",
- },
-};
-
-static struct platform_device *gbefb_device;
-
-static int __init gbefb_init(void)
-{
- int ret = platform_driver_register(&gbefb_driver);
- if (!ret) {
- gbefb_device = platform_device_alloc("gbefb", 0);
- if (gbefb_device) {
- ret = platform_device_add(gbefb_device);
- } else {
- ret = -ENOMEM;
- }
- if (ret) {
- platform_device_put(gbefb_device);
- platform_driver_unregister(&gbefb_driver);
- }
- }
- return ret;
-}
-
-static void __exit gbefb_exit(void)
-{
- platform_device_unregister(gbefb_device);
- platform_driver_unregister(&gbefb_driver);
-}
-
-module_init(gbefb_init);
-module_exit(gbefb_exit);
-
-MODULE_LICENSE("GPL");
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