/* * GRUB -- GRand Unified Bootloader * Copyright (C) 2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc. * * GRUB is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * GRUB is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GRUB. If not, see <http://www.gnu.org/licenses/>. */ #define grub_video_render_target grub_video_fbrender_target #include <grub/err.h> #include <grub/types.h> #include <grub/dl.h> #include <grub/misc.h> #include <grub/mm.h> #include <grub/video.h> #include <grub/video_fb.h> #include <grub/pci.h> #include <grub/vga.h> GRUB_MOD_LICENSE ("GPLv3+"); static struct { struct grub_video_mode_info mode_info; grub_size_t page_size; /* The size of a page in bytes. */ grub_uint8_t *ptr; int mapped; grub_uint32_t base; grub_pci_device_t dev; } framebuffer; #define CIRRUS_APERTURE_SIZE 0x1000000 #define CIRRUS_MAX_WIDTH 0x800 #define CIRRUS_MAX_HEIGHT 0x800 #define CIRRUS_MAX_PITCH (0x1ff * GRUB_VGA_CR_PITCH_DIVISOR) enum { CIRRUS_CR_EXTENDED_DISPLAY = 0x1b, CIRRUS_CR_EXTENDED_OVERLAY = 0x1d, CIRRUS_CR_MAX }; #define CIRRUS_CR_EXTENDED_DISPLAY_PITCH_MASK 0x10 #define CIRRUS_CR_EXTENDED_DISPLAY_PITCH_SHIFT 4 #define CIRRUS_CR_EXTENDED_DISPLAY_START_MASK1 0x1 #define CIRRUS_CR_EXTENDED_DISPLAY_START_SHIFT1 16 #define CIRRUS_CR_EXTENDED_DISPLAY_START_MASK2 0xc #define CIRRUS_CR_EXTENDED_DISPLAY_START_SHIFT2 15 #define CIRRUS_CR_EXTENDED_OVERLAY_DISPLAY_START_MASK 0x80 #define CIRRUS_CR_EXTENDED_OVERLAY_DISPLAY_START_SHIFT 12 enum { CIRRUS_SR_EXTENDED_MODE = 7, CIRRUS_SR_MAX }; #define CIRRUS_SR_EXTENDED_MODE_LFB_ENABLE 0xf0 #define CIRRUS_SR_EXTENDED_MODE_ENABLE_EXT 0x01 #define CIRRUS_SR_EXTENDED_MODE_8BPP 0x00 #define CIRRUS_SR_EXTENDED_MODE_16BPP 0x06 #define CIRRUS_SR_EXTENDED_MODE_24BPP 0x04 #define CIRRUS_SR_EXTENDED_MODE_32BPP 0x08 #define CIRRUS_HIDDEN_DAC_ENABLE_EXT 0x80 #define CIRRUS_HIDDEN_DAC_ENABLE_ALL 0x40 #define CIRRUS_HIDDEN_DAC_8BPP 0 #define CIRRUS_HIDDEN_DAC_15BPP (CIRRUS_HIDDEN_DAC_ENABLE_EXT \ | CIRRUS_HIDDEN_DAC_ENABLE_ALL | 0) #define CIRRUS_HIDDEN_DAC_16BPP (CIRRUS_HIDDEN_DAC_ENABLE_EXT \ | CIRRUS_HIDDEN_DAC_ENABLE_ALL | 1) #define CIRRUS_HIDDEN_DAC_888COLOR (CIRRUS_HIDDEN_DAC_ENABLE_EXT \ | CIRRUS_HIDDEN_DAC_ENABLE_ALL | 5) static void write_hidden_dac (grub_uint8_t data) { grub_inb (GRUB_VGA_IO_PALLETTE_WRITE_INDEX); grub_inb (GRUB_VGA_IO_PIXEL_MASK); grub_inb (GRUB_VGA_IO_PIXEL_MASK); grub_inb (GRUB_VGA_IO_PIXEL_MASK); grub_inb (GRUB_VGA_IO_PIXEL_MASK); grub_outb (data, GRUB_VGA_IO_PIXEL_MASK); } static grub_uint8_t read_hidden_dac (void) { grub_inb (GRUB_VGA_IO_PALLETTE_WRITE_INDEX); grub_inb (GRUB_VGA_IO_PIXEL_MASK); grub_inb (GRUB_VGA_IO_PIXEL_MASK); grub_inb (GRUB_VGA_IO_PIXEL_MASK); grub_inb (GRUB_VGA_IO_PIXEL_MASK); return grub_inb (GRUB_VGA_IO_PIXEL_MASK); } struct saved_state { grub_uint8_t cr[CIRRUS_CR_MAX]; grub_uint8_t gr[GRUB_VGA_GR_MAX]; grub_uint8_t sr[CIRRUS_SR_MAX]; grub_uint8_t hidden_dac; /* We need to preserve VGA font and VGA text. */ grub_uint8_t vram[32 * 4 * 256]; grub_uint8_t r[256]; grub_uint8_t g[256]; grub_uint8_t b[256]; }; static struct saved_state initial_state; static int state_saved = 0; static void save_state (struct saved_state *st) { unsigned i; for (i = 0; i < ARRAY_SIZE (st->cr); i++) st->cr[i] = grub_vga_cr_read (i); for (i = 0; i < ARRAY_SIZE (st->sr); i++) st->sr[i] = grub_vga_sr_read (i); for (i = 0; i < ARRAY_SIZE (st->gr); i++) st->gr[i] = grub_vga_gr_read (i); for (i = 0; i < 256; i++) grub_vga_palette_read (i, st->r + i, st->g + i, st->b + i); st->hidden_dac = read_hidden_dac (); grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_CHAIN4, GRUB_VGA_SR_MEMORY_MODE); grub_memcpy (st->vram, framebuffer.ptr, sizeof (st->vram)); } static void restore_state (struct saved_state *st) { unsigned i; grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_CHAIN4, GRUB_VGA_SR_MEMORY_MODE); grub_memcpy (framebuffer.ptr, st->vram, sizeof (st->vram)); for (i = 0; i < ARRAY_SIZE (st->cr); i++) grub_vga_cr_write (st->cr[i], i); for (i = 0; i < ARRAY_SIZE (st->sr); i++) grub_vga_sr_write (st->sr[i], i); for (i = 0; i < ARRAY_SIZE (st->gr); i++) grub_vga_gr_write (st->gr[i], i); for (i = 0; i < 256; i++) grub_vga_palette_write (i, st->r[i], st->g[i], st->b[i]); write_hidden_dac (st->hidden_dac); } static grub_err_t grub_video_cirrus_video_init (void) { /* Reset frame buffer. */ grub_memset (&framebuffer, 0, sizeof(framebuffer)); return grub_video_fb_init (); } static grub_err_t grub_video_cirrus_video_fini (void) { if (framebuffer.mapped) grub_pci_device_unmap_range (framebuffer.dev, framebuffer.ptr, CIRRUS_APERTURE_SIZE); if (state_saved) { restore_state (&initial_state); state_saved = 0; } return grub_video_fb_fini (); } static grub_err_t doublebuf_pageflipping_set_page (int page) { int start = framebuffer.page_size * page / 4; grub_uint8_t cr_ext, cr_overlay; grub_vga_cr_write (start & 0xff, GRUB_VGA_CR_START_ADDR_LOW_REGISTER); grub_vga_cr_write ((start & 0xff00) >> 8, GRUB_VGA_CR_START_ADDR_HIGH_REGISTER); cr_ext = grub_vga_cr_read (CIRRUS_CR_EXTENDED_DISPLAY); cr_ext &= ~(CIRRUS_CR_EXTENDED_DISPLAY_START_MASK1 | CIRRUS_CR_EXTENDED_DISPLAY_START_MASK2); cr_ext |= ((start >> CIRRUS_CR_EXTENDED_DISPLAY_START_SHIFT1) & CIRRUS_CR_EXTENDED_DISPLAY_START_MASK1); cr_ext |= ((start >> CIRRUS_CR_EXTENDED_DISPLAY_START_SHIFT2) & CIRRUS_CR_EXTENDED_DISPLAY_START_MASK2); grub_vga_cr_write (cr_ext, CIRRUS_CR_EXTENDED_DISPLAY); cr_overlay = grub_vga_cr_read (CIRRUS_CR_EXTENDED_OVERLAY); cr_overlay &= ~(CIRRUS_CR_EXTENDED_OVERLAY_DISPLAY_START_MASK); cr_overlay |= ((start >> CIRRUS_CR_EXTENDED_OVERLAY_DISPLAY_START_SHIFT) & CIRRUS_CR_EXTENDED_OVERLAY_DISPLAY_START_MASK); grub_vga_cr_write (cr_overlay, CIRRUS_CR_EXTENDED_OVERLAY); return GRUB_ERR_NONE; } static grub_err_t grub_video_cirrus_set_palette (unsigned int start, unsigned int count, struct grub_video_palette_data *palette_data) { if (framebuffer.mode_info.mode_type == GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) { unsigned i; if (start >= 0x100) return GRUB_ERR_NONE; if (start + count >= 0x100) count = 0x100 - start; for (i = 0; i < count; i++) grub_vga_palette_write (start + i, palette_data[i].r, palette_data[i].g, palette_data[i].b); } /* Then set color to emulated palette. */ return grub_video_fb_set_palette (start, count, palette_data); } static grub_err_t grub_video_cirrus_setup (unsigned int width, unsigned int height, grub_video_mode_type_t mode_type, grub_video_mode_type_t mode_mask) { int depth; grub_err_t err; int found = 0; int pitch, bytes_per_pixel; auto int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid __attribute__ ((unused))); int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid) { grub_pci_address_t addr; grub_uint32_t class; addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS); class = grub_pci_read (addr); if (((class >> 16) & 0xffff) != 0x0300 || pciid != 0x00b81013) return 0; found = 1; addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0); framebuffer.base = grub_pci_read (addr) & GRUB_PCI_ADDR_MEM_MASK; framebuffer.dev = dev; return 1; } /* Decode depth from mode_type. If it is zero, then autodetect. */ depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK) >> GRUB_VIDEO_MODE_TYPE_DEPTH_POS; if (width == 0 || height == 0) { width = 800; height = 600; } if (width & (GRUB_VGA_CR_WIDTH_DIVISOR - 1)) return grub_error (GRUB_ERR_IO, "screen width must be a multiple of %d", GRUB_VGA_CR_WIDTH_DIVISOR); if (width > CIRRUS_MAX_WIDTH) return grub_error (GRUB_ERR_IO, "screen width must be at most %d", CIRRUS_MAX_WIDTH); if (height > CIRRUS_MAX_HEIGHT) return grub_error (GRUB_ERR_IO, "screen height must be at most %d", CIRRUS_MAX_HEIGHT); if (depth == 0 && !grub_video_check_mode_flag (mode_type, mode_mask, GRUB_VIDEO_MODE_TYPE_INDEX_COLOR, 0)) depth = 24; if (depth == 0) depth = 8; if (depth != 32 && depth != 24 && depth != 16 && depth != 15 && depth != 8) return grub_error (GRUB_ERR_IO, "only 32, 24, 16, 15 and 8-bit bpp are" " supported by cirrus video"); bytes_per_pixel = (depth + 7) / 8; pitch = width * bytes_per_pixel; if (pitch > CIRRUS_MAX_PITCH) return grub_error (GRUB_ERR_IO, "screen width must be at most %d at bitdepth %d", CIRRUS_MAX_PITCH / bytes_per_pixel, depth); framebuffer.page_size = pitch * height; if (framebuffer.page_size > CIRRUS_APERTURE_SIZE) return grub_error (GRUB_ERR_IO, "Not enough video memory for this mode"); grub_pci_iterate (find_card); if (!found) return grub_error (GRUB_ERR_IO, "Couldn't find graphics card"); if (found && framebuffer.base == 0) { /* FIXME: change framebuffer base */ return grub_error (GRUB_ERR_IO, "PCI BAR not set"); } /* We can safely discard volatile attribute. */ framebuffer.ptr = (void *) grub_pci_device_map_range (framebuffer.dev, framebuffer.base, CIRRUS_APERTURE_SIZE); framebuffer.mapped = 1; if (!state_saved) { save_state (&initial_state); state_saved = 1; } { struct grub_video_hw_config config = { .pitch = pitch / GRUB_VGA_CR_PITCH_DIVISOR, .line_compare = 0x3ff, .vdisplay_end = height - 1, .horizontal_end = width / GRUB_VGA_CR_WIDTH_DIVISOR }; grub_uint8_t sr_ext = 0, hidden_dac = 0; grub_vga_set_geometry (&config, grub_vga_cr_write); grub_vga_gr_write (GRUB_VGA_GR_MODE_256_COLOR | GRUB_VGA_GR_MODE_READ_MODE1, GRUB_VGA_GR_MODE); grub_vga_gr_write (GRUB_VGA_GR_GR6_GRAPHICS_MODE, GRUB_VGA_GR_GR6); grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_NORMAL, GRUB_VGA_SR_MEMORY_MODE); grub_vga_cr_write ((config.pitch >> CIRRUS_CR_EXTENDED_DISPLAY_PITCH_SHIFT) & CIRRUS_CR_EXTENDED_DISPLAY_PITCH_MASK, CIRRUS_CR_EXTENDED_DISPLAY); grub_vga_cr_write (GRUB_VGA_CR_MODE_TIMING_ENABLE | GRUB_VGA_CR_MODE_BYTE_MODE | GRUB_VGA_CR_MODE_NO_HERCULES | GRUB_VGA_CR_MODE_NO_CGA, GRUB_VGA_CR_MODE); doublebuf_pageflipping_set_page (0); sr_ext = CIRRUS_SR_EXTENDED_MODE_LFB_ENABLE | CIRRUS_SR_EXTENDED_MODE_ENABLE_EXT; switch (depth) { /* FIXME: support 8-bit grayscale and 8-bit RGB. */ case 32: hidden_dac = CIRRUS_HIDDEN_DAC_888COLOR; sr_ext |= CIRRUS_SR_EXTENDED_MODE_32BPP; break; case 24: hidden_dac = CIRRUS_HIDDEN_DAC_888COLOR; sr_ext |= CIRRUS_SR_EXTENDED_MODE_24BPP; break; case 16: hidden_dac = CIRRUS_HIDDEN_DAC_16BPP; sr_ext |= CIRRUS_SR_EXTENDED_MODE_16BPP; break; case 15: hidden_dac = CIRRUS_HIDDEN_DAC_15BPP; sr_ext |= CIRRUS_SR_EXTENDED_MODE_16BPP; break; case 8: hidden_dac = CIRRUS_HIDDEN_DAC_8BPP; sr_ext |= CIRRUS_SR_EXTENDED_MODE_8BPP; break; } grub_vga_sr_write (sr_ext, CIRRUS_SR_EXTENDED_MODE); write_hidden_dac (hidden_dac); } /* Fill mode info details. */ framebuffer.mode_info.width = width; framebuffer.mode_info.height = height; framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB; framebuffer.mode_info.bpp = depth; framebuffer.mode_info.bytes_per_pixel = bytes_per_pixel; framebuffer.mode_info.pitch = pitch; framebuffer.mode_info.number_of_colors = 256; framebuffer.mode_info.reserved_mask_size = 0; framebuffer.mode_info.reserved_field_pos = 0; switch (depth) { case 8: framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_INDEX_COLOR; break; case 16: framebuffer.mode_info.red_mask_size = 5; framebuffer.mode_info.red_field_pos = 11; framebuffer.mode_info.green_mask_size = 6; framebuffer.mode_info.green_field_pos = 5; framebuffer.mode_info.blue_mask_size = 5; framebuffer.mode_info.blue_field_pos = 0; break; case 15: framebuffer.mode_info.red_mask_size = 5; framebuffer.mode_info.red_field_pos = 10; framebuffer.mode_info.green_mask_size = 5; framebuffer.mode_info.green_field_pos = 5; framebuffer.mode_info.blue_mask_size = 5; framebuffer.mode_info.blue_field_pos = 0; break; case 32: framebuffer.mode_info.reserved_mask_size = 8; framebuffer.mode_info.reserved_field_pos = 24; case 24: framebuffer.mode_info.red_mask_size = 8; framebuffer.mode_info.red_field_pos = 16; framebuffer.mode_info.green_mask_size = 8; framebuffer.mode_info.green_field_pos = 8; framebuffer.mode_info.blue_mask_size = 8; framebuffer.mode_info.blue_field_pos = 0; break; } framebuffer.mode_info.blit_format = grub_video_get_blit_format (&framebuffer.mode_info); if (CIRRUS_APERTURE_SIZE >= 2 * framebuffer.page_size) err = grub_video_fb_setup (mode_type, mode_mask, &framebuffer.mode_info, framebuffer.ptr, doublebuf_pageflipping_set_page, framebuffer.ptr + framebuffer.page_size); else err = grub_video_fb_setup (mode_type, mode_mask, &framebuffer.mode_info, framebuffer.ptr, 0, 0); /* Copy default palette to initialize emulated palette. */ err = grub_video_cirrus_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS, grub_video_fbstd_colors); return err; } static struct grub_video_adapter grub_video_cirrus_adapter = { .name = "Cirrus CLGD 5446 PCI Video Driver", .id = GRUB_VIDEO_DRIVER_CIRRUS, .prio = GRUB_VIDEO_ADAPTER_PRIO_NATIVE, .init = grub_video_cirrus_video_init, .fini = grub_video_cirrus_video_fini, .setup = grub_video_cirrus_setup, .get_info = grub_video_fb_get_info, .get_info_and_fini = grub_video_fb_get_info_and_fini, .set_palette = grub_video_cirrus_set_palette, .get_palette = grub_video_fb_get_palette, .set_viewport = grub_video_fb_set_viewport, .get_viewport = grub_video_fb_get_viewport, .map_color = grub_video_fb_map_color, .map_rgb = grub_video_fb_map_rgb, .map_rgba = grub_video_fb_map_rgba, .unmap_color = grub_video_fb_unmap_color, .fill_rect = grub_video_fb_fill_rect, .blit_bitmap = grub_video_fb_blit_bitmap, .blit_render_target = grub_video_fb_blit_render_target, .scroll = grub_video_fb_scroll, .swap_buffers = grub_video_fb_swap_buffers, .create_render_target = grub_video_fb_create_render_target, .delete_render_target = grub_video_fb_delete_render_target, .set_active_render_target = grub_video_fb_set_active_render_target, .get_active_render_target = grub_video_fb_get_active_render_target, .next = 0 }; GRUB_MOD_INIT(video_cirrus) { grub_video_register (&grub_video_cirrus_adapter); } GRUB_MOD_FINI(video_cirrus) { grub_video_unregister (&grub_video_cirrus_adapter); }