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drivers/video/gbefb.c
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/* * 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. */ |
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#include <linux/delay.h> |
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#include <linux/platform_device.h> |
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#include <linux/dma-mapping.h> #include <linux/errno.h> |
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#include <linux/gfp.h> |
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#include <linux/fb.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/module.h> #ifdef CONFIG_X86 #include <asm/mtrr.h> #endif #ifdef CONFIG_MIPS #include <asm/addrspace.h> #endif #include <asm/byteorder.h> #include <asm/io.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 #ifdef CONFIG_X86_VISWS #define GBE_BASE 0xd0000000 /* SGI Visual Workstation */ #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; |
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static unsigned long gbe_mem_phys; |
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static struct { uint16_t *cpu; dma_addr_t dma; } gbe_tiles; static int gbe_revision; static int ypan, ywrap; |
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static uint32_t pseudo_palette[16]; |
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static uint32_t gbe_cmap[256]; static int gbe_turned_on; /* 0 turned off, 1 turned on */ |
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static char *mode_option __devinitdata = NULL; |
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/* default CRT mode */ |
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static struct fb_var_screeninfo default_var_CRT __devinitdata = { |
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/* 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 */ |
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static struct fb_var_screeninfo default_var_LCD __devinitdata = { |
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/* 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) */ |
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static struct fb_videomode default_mode_CRT __devinitdata = { |
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.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 */ |
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static struct fb_videomode default_mode_LCD __devinitdata = { |
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/* 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, }; |
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static struct fb_videomode *default_mode __devinitdata = &default_mode_CRT; static struct fb_var_screeninfo *default_var __devinitdata = &default_var_CRT; |
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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. */ |
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static void gbe_turn_off(void) |
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{ int i; unsigned int val, x, y, vpixen_off; |
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gbe_turned_on = 0; |
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/* 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 "); /* 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 "); 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 "); /* 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 "); /* 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 "); /* 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 "); /* 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 "); /* 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 "); |
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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 "); gbe->cmap[i] = gbe_cmap[i]; } |
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} /* * 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(); |
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gbe_loadcmap(); |
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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); |
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
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break; case 2: SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_ARGB5); |
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info->fix.visual = FB_VISUAL_TRUECOLOR; |
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break; case 4: SET_GBE_FIELD(WID, TYP, val, GBE_CMODE_RGB8); |
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info->fix.visual = FB_VISUAL_TRUECOLOR; |
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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. |
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For example in 640x480 8 bit mode the mapping is: |
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<-------- 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 |
25985edce Fix common misspe... |
727 |
really convenient. In order to support linear addressing, the GBE |
1da177e4c Linux-2.6.12-rc2 |
728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 |
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 */ |
8d0b1c51e gbefb: cmap FIFO ... |
824 825 |
for (i = 0; i < 256; i++) gbe_cmap[i] = (i << 8) | (i << 16) | (i << 24); |
1da177e4c Linux-2.6.12-rc2 |
826 |
|
8d0b1c51e gbefb: cmap FIFO ... |
827 |
gbe_loadcmap(); |
1da177e4c Linux-2.6.12-rc2 |
828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 |
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; |
9058be43c gbefb: the pseudo... |
875 |
if (info->var.bits_per_pixel <= 8) { |
8d0b1c51e gbefb: cmap FIFO ... |
876 877 878 879 880 881 882 883 884 885 886 |
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 "); return 1; } gbe->cmap[regno] = gbe_cmap[regno]; |
1da177e4c Linux-2.6.12-rc2 |
887 |
} |
9058be43c gbefb: the pseudo... |
888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 |
} 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; } |
1da177e4c Linux-2.6.12-rc2 |
907 908 909 910 911 912 913 914 915 916 917 918 |
} 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; |
6405141fb gbefb: unsigned v... |
919 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 |
/* 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 */ |
6405141fb gbefb: unsigned v... |
937 938 939 940 |
ret = compute_gbe_timing(var, &timing); var->pixclock = ret; if (ret < 0) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 |
/* 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; } |
216d526c8 [PATCH] fbdev: Sa... |
1008 |
static int gbefb_mmap(struct fb_info *info, |
1da177e4c Linux-2.6.12-rc2 |
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 |
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 (offset + size > gbe_mem_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)); vma->vm_flags |= VM_IO | VM_RESERVED; |
1da177e4c Linux-2.6.12-rc2 |
1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 |
/* 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, |
1da177e4c Linux-2.6.12-rc2 |
1066 1067 1068 1069 1070 |
}; /* * sysfs */ |
060b8845e [PATCH] Driver Co... |
1071 |
static ssize_t gbefb_show_memsize(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
1072 1073 1074 1075 1076 1077 |
{ return snprintf(buf, PAGE_SIZE, "%d ", gbe_mem_size); } static DEVICE_ATTR(size, S_IRUGO, gbefb_show_memsize, NULL); |
060b8845e [PATCH] Driver Co... |
1078 |
static ssize_t gbefb_show_rev(struct device *device, struct device_attribute *attr, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 |
{ return snprintf(buf, PAGE_SIZE, "%d ", gbe_revision); } static DEVICE_ATTR(revision, S_IRUGO, gbefb_show_rev, NULL); static void __devexit 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 */ |
18f9f11a0 VIDEO. gbefb: Fix... |
1101 |
static int __devinit gbefb_setup(char *options) |
1da177e4c Linux-2.6.12-rc2 |
1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 |
{ 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; } |
c2e13037e platform-drivers:... |
1131 |
static int __devinit gbefb_probe(struct platform_device *p_dev) |
1da177e4c Linux-2.6.12-rc2 |
1132 1133 1134 1135 |
{ int i, ret = 0; struct fb_info *info; struct gbefb_par *par; |
1da177e4c Linux-2.6.12-rc2 |
1136 1137 1138 1139 1140 1141 1142 1143 1144 |
#ifndef MODULE char *options = NULL; #endif info = framebuffer_alloc(sizeof(struct gbefb_par), &p_dev->dev); if (!info) return -ENOMEM; #ifndef MODULE |
f35691062 drivers/video/gbe... |
1145 1146 1147 1148 |
if (fb_get_options("gbefb", &options)) { ret = -ENODEV; goto out_release_framebuffer; } |
1da177e4c Linux-2.6.12-rc2 |
1149 1150 |
gbefb_setup(options); #endif |
0fdd07f77 VIDEO: Correct us... |
1151 |
if (!request_mem_region(GBE_BASE, sizeof(struct sgi_gbe), "GBE")) { |
1da177e4c Linux-2.6.12-rc2 |
1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
printk(KERN_ERR "gbefb: couldn't reserve mmio region "); ret = -EBUSY; goto out_release_framebuffer; } gbe = (struct sgi_gbe *) ioremap(GBE_BASE, sizeof(struct sgi_gbe)); if (!gbe) { printk(KERN_ERR "gbefb: couldn't map mmio region "); 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 "); ret = -ENOMEM; goto out_unmap; } if (gbe_mem_phys) { /* memory was allocated at boot time */ gbe_mem = ioremap_nocache(gbe_mem_phys, gbe_mem_size); |
6d7bf017e It helps to not u... |
1180 1181 1182 1183 1184 1185 |
if (!gbe_mem) { printk(KERN_ERR "gbefb: couldn't map framebuffer "); ret = -ENOMEM; goto out_tiles_free; } |
1da177e4c Linux-2.6.12-rc2 |
1186 1187 1188 1189 1190 1191 |
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); |
6d7bf017e It helps to not u... |
1192 1193 1194 1195 1196 1197 |
if (!gbe_mem) { printk(KERN_ERR "gbefb: couldn't allocate framebuffer memory "); ret = -ENOMEM; goto out_tiles_free; } |
1da177e4c Linux-2.6.12-rc2 |
1198 1199 1200 1201 1202 1203 |
gbe_mem_phys = (unsigned long) gbe_dma_addr; } #ifdef CONFIG_X86 mtrr_add(gbe_mem_phys, gbe_mem_size, MTRR_TYPE_WRCOMB, 1); #endif |
1da177e4c Linux-2.6.12-rc2 |
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 |
/* 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 "); ret = -ENXIO; goto out_gbe_unmap; } |
3ae5eaec1 [DRIVER MODEL] Co... |
1232 1233 |
platform_set_drvdata(p_dev, info); gbefb_create_sysfs(&p_dev->dev); |
1da177e4c Linux-2.6.12-rc2 |
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 |
printk(KERN_INFO "fb%d: %s rev %d @ 0x%08x using %dkB memory ", info->node, 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); else iounmap(gbe_mem); out_tiles_free: dma_free_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t), (void *)gbe_tiles.cpu, gbe_tiles.dma); out_unmap: iounmap(gbe); out_release_mem_region: release_mem_region(GBE_BASE, sizeof(struct sgi_gbe)); out_release_framebuffer: framebuffer_release(info); return ret; } |
3ae5eaec1 [DRIVER MODEL] Co... |
1259 |
static int __devexit gbefb_remove(struct platform_device* p_dev) |
1da177e4c Linux-2.6.12-rc2 |
1260 |
{ |
3ae5eaec1 [DRIVER MODEL] Co... |
1261 |
struct fb_info *info = platform_get_drvdata(p_dev); |
1da177e4c Linux-2.6.12-rc2 |
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 |
unregister_framebuffer(info); gbe_turn_off(); if (gbe_dma_addr) dma_free_coherent(NULL, gbe_mem_size, gbe_mem, gbe_mem_phys); else iounmap(gbe_mem); 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)); iounmap(gbe); |
d30864392 [PATCH] Fix SGI O... |
1273 |
gbefb_remove_sysfs(&p_dev->dev); |
1da177e4c Linux-2.6.12-rc2 |
1274 1275 1276 1277 |
framebuffer_release(info); return 0; } |
3ae5eaec1 [DRIVER MODEL] Co... |
1278 |
static struct platform_driver gbefb_driver = { |
1da177e4c Linux-2.6.12-rc2 |
1279 1280 |
.probe = gbefb_probe, .remove = __devexit_p(gbefb_remove), |
3ae5eaec1 [DRIVER MODEL] Co... |
1281 1282 1283 |
.driver = { .name = "gbefb", }, |
1da177e4c Linux-2.6.12-rc2 |
1284 |
}; |
abbf268ae [DRIVER MODEL] Fi... |
1285 |
static struct platform_device *gbefb_device; |
1da177e4c Linux-2.6.12-rc2 |
1286 |
|
b6d57ae97 MIPS: gbe: Make n... |
1287 |
static int __init gbefb_init(void) |
1da177e4c Linux-2.6.12-rc2 |
1288 |
{ |
3ae5eaec1 [DRIVER MODEL] Co... |
1289 |
int ret = platform_driver_register(&gbefb_driver); |
1da177e4c Linux-2.6.12-rc2 |
1290 |
if (!ret) { |
abbf268ae [DRIVER MODEL] Fi... |
1291 1292 1293 1294 1295 1296 1297 1298 |
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); |
3ae5eaec1 [DRIVER MODEL] Co... |
1299 |
platform_driver_unregister(&gbefb_driver); |
abbf268ae [DRIVER MODEL] Fi... |
1300 |
} |
1da177e4c Linux-2.6.12-rc2 |
1301 1302 1303 |
} return ret; } |
b6d57ae97 MIPS: gbe: Make n... |
1304 |
static void __exit gbefb_exit(void) |
1da177e4c Linux-2.6.12-rc2 |
1305 |
{ |
abbf268ae [DRIVER MODEL] Fi... |
1306 |
platform_device_unregister(gbefb_device); |
3ae5eaec1 [DRIVER MODEL] Co... |
1307 |
platform_driver_unregister(&gbefb_driver); |
1da177e4c Linux-2.6.12-rc2 |
1308 1309 1310 1311 1312 1313 |
} module_init(gbefb_init); module_exit(gbefb_exit); MODULE_LICENSE("GPL"); |