| /* |
| * 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> |
| |
| #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; |
| 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 __devinitdata = NULL; |
| |
| /* default CRT mode */ |
| static struct fb_var_screeninfo default_var_CRT __devinitdata = { |
| /* 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 __devinitdata = { |
| /* 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 __devinitdata = { |
| .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 __devinitdata = { |
| /* 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 __devinitdata = &default_mode_CRT; |
| static struct fb_var_screeninfo *default_var __devinitdata = &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 convienient. 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 (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; |
| |
| /* 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 __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 |
| */ |
| |
| static int __devinit 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 __devinit 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)) |
| return -ENODEV; |
| 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 *) ioremap(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_unmap; |
| } |
| |
| if (gbe_mem_phys) { |
| /* memory was allocated at boot time */ |
| gbe_mem = ioremap_nocache(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); |
| |
| printk(KERN_INFO "fb%d: %s rev %d @ 0x%08x using %dkB memory\n", |
| 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; |
| } |
| |
| static int __devexit 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); |
| 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); |
| gbefb_remove_sysfs(&p_dev->dev); |
| framebuffer_release(info); |
| |
| return 0; |
| } |
| |
| static struct platform_driver gbefb_driver = { |
| .probe = gbefb_probe, |
| .remove = __devexit_p(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"); |