/* $Id: g364fb.c,v 1.3 1998/08/28 22:43:00 tsbogend Exp $ * * linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device * * (C) 1998 Thomas Bogendoerfer * * This driver is based on tgafb.c * * Copyright (C) 1997 Geert Uytterhoeven * Copyright (C) 1995 Jay Estabrook * * 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 #include #include #include #include #include #include #include #include #include #include #include #include /* * Various defines for the G364 */ #define G364_MEM_BASE 0xe4400000 #define G364_PORT_BASE 0xe4000000 #define ID_REG 0xe4000000 /* Read only */ #define BOOT_REG 0xe4080000 #define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */ #define DISPLAY_REG 0xe4080118 #define VDISPLAY_REG 0xe4080150 #define MASK_REG 0xe4080200 #define CTLA_REG 0xe4080300 #define CURS_TOGGLE 0x800000 #define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */ #define DELAY_SAMPLE 0x080000 #define PORT_INTER 0x040000 #define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */ #define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */ #define TR_CYCLE_TOG 0x004000 #define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */ #define BLANK_OFF 0x000800 #define FORCE_BLANK 0x000400 #define BLK_FUN_SWTCH 0x000200 #define BLANK_IO 0x000100 #define BLANK_LEVEL 0x000080 #define A_VID_FORM 0x000040 #define D_SYNC_FORM 0x000020 #define FRAME_FLY_PAT 0x000010 #define OP_MODE 0x000008 #define INTL_STAND 0x000004 #define SCRN_FORM 0x000002 #define ENABLE_VTG 0x000001 #define TOP_REG 0xe4080400 #define CURS_PAL_REG 0xe4080508 /* to 0x080518 */ #define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */ #define CURS_POS_REG 0xe4080638 #define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */ #define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */ #define MON_ID_REG 0xe4100000 /* unused */ #define RESET_REG 0xe4180000 /* Write only */ static struct fb_info fb_info; static struct fb_fix_screeninfo fb_fix __initdata = { .id = "G364 8plane", .smem_start = 0x40000000, /* physical address */ .type = FB_TYPE_PACKED_PIXELS, .visual = FB_VISUAL_PSEUDOCOLOR, .ypanstep = 1, .accel = FB_ACCEL_NONE, }; static struct fb_var_screeninfo fb_var __initdata = { .bits_per_pixel = 8, .red = { 0, 8, 0 }, .green = { 0, 8, 0 }, .blue = { 0, 8, 0 }, .activate = FB_ACTIVATE_NOW, .height = -1, .width = -1, .pixclock = 39722, .left_margin = 40, .right_margin = 24, .upper_margin = 32, .lower_margin = 11, .hsync_len = 96, .vsync_len = 2, .vmode = FB_VMODE_NONINTERLACED, }; /* * Interface used by the world */ int g364fb_init(void); static int g364fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info); static int g364fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int transp, struct fb_info *info); static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor); static int g364fb_blank(int blank, struct fb_info *info); static struct fb_ops g364fb_ops = { .owner = THIS_MODULE, .fb_setcolreg = g364fb_setcolreg, .fb_pan_display = g364fb_pan_display, .fb_blank = g364fb_blank, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, .fb_cursor = g364fb_cursor, }; int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor) { switch (cursor->enable) { case CM_ERASE: *(unsigned int *) CTLA_REG |= CURS_TOGGLE; break; case CM_MOVE: case CM_DRAW: *(unsigned int *) CTLA_REG &= ~CURS_TOGGLE; *(unsigned int *) CURS_POS_REG = ((x * fontwidth(p)) << 12) | ((y * fontheight(p)) - info->var.yoffset); break; } return 0; } /* * Pan or Wrap the Display * * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag */ static int g364fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) { if (var->xoffset || var->yoffset + info->var.yres > info->var.yres_virtual) return -EINVAL; *(unsigned int *) TOP_REG = var->yoffset * info->var.xres; return 0; } /* * Blank the display. */ static int g364fb_blank(int blank, struct fb_info *info) { if (blank) *(unsigned int *) CTLA_REG |= FORCE_BLANK; else *(unsigned int *) CTLA_REG &= ~FORCE_BLANK; return 0; } /* * Set a single color register. Return != 0 for invalid regno. */ static int g364fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int transp, struct fb_info *info) { volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG; if (regno > 255) return 1; red >>= 8; green >>= 8; blue >>= 8; ptr[regno << 1] = (red << 16) | (green << 8) | blue; return 0; } /* * Initialisation */ int __init g364fb_init(void) { volatile unsigned int *pal_ptr = (volatile unsigned int *) CLR_PAL_REG; volatile unsigned int *curs_pal_ptr = (volatile unsigned int *) CURS_PAL_REG; int mem, i, j; if (fb_get_options("g364fb", NULL)) return -ENODEV; /* TBD: G364 detection */ /* get the resolution set by ARC console */ *(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG; fb_var.xres = (*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4; fb_var.yres = (*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2; *(volatile unsigned int *) CTLA_REG |= ENABLE_VTG; /* setup cursor */ curs_pal_ptr[0] |= 0x00ffffff; curs_pal_ptr[2] |= 0x00ffffff; curs_pal_ptr[4] |= 0x00ffffff; /* * first set the whole cursor to transparent */ for (i = 0; i < 512; i++) *(unsigned short *) (CURS_PAT_REG + i * 8) = 0; /* * switch the last two lines to cursor palette 3 * we assume here, that FONTSIZE_X is 8 */ *(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff; *(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff; fb_var.xres_virtual = fbvar.xres; fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel; fb_fix.smem_start = 0x40000000; /* physical address */ /* get size of video memory; this is special for the JAZZ hardware */ mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3; fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024; fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres; fb_info.fbops = &g364fb_ops; fb_info.screen_base = (char *) G364_MEM_BASE; /* virtual kernel address */ fb_info.var = fb_var; fb_info.fix = fb_fix; fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; fb_alloc_cmap(&fb_info.cmap, 255, 0); if (register_framebuffer(&fb_info) < 0) return -EINVAL; return 0; } module_init(g364fb_init); MODULE_LICENSE("GPL"); l_atomic_commit_tail+0x749/0xfe0 [i915] intel_atomic_commit+0x3cb/0x4f0 [i915] drm_atomic_commit+0x4b/0x50 [drm] restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper] drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/usb/storage/unusual_jumpshot.h')