--- /dev/null
+/*
+ * 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>
+
+static struct
+{
+ struct grub_video_mode_info mode_info;
+ struct grub_video_render_target *render_target;
+
+ grub_uint8_t *ptr;
+ int mapped;
+ grub_uint32_t base;
+ grub_pci_device_t dev;
+} framebuffer;
+
+#define CIRRUS_APERTURE_SIZE 0x200000
+
+#define GR_INDEX 0x3ce
+#define GR_DATA 0x3cf
+#define CR_INDEX 0x3d4
+#define CR_DATA 0x3d5
+#define SR_INDEX 0x3c4
+#define SR_DATA 0x3c5
+
+#define CIRRUS_MAX_WIDTH 0x800
+#define CIRRUS_WIDTH_DIVISOR 8
+#define CIRRUS_MAX_HEIGHT 0x800
+#define CIRRUS_MAX_PITCH (0x1ff * CIRRUS_WIDTH_DIVISOR)
+
+enum
+ {
+ CIRRUS_GR_MODE = 5,
+ CIRRUS_GR_GR6 = 6,
+ CIRRUS_GR_MAX
+ };
+
+#define CIRRUS_GR_GR6_GRAPHICS_MODE 1
+
+#define CIRRUS_GR_MODE_256_COLOR 0x40
+#define CIRRUS_GR_MODE_READ_MODE1 0x08
+
+enum
+ {
+ CIRRUS_CR_WIDTH = 0x01,
+ CIRRUS_CR_OVERFLOW = 0x07,
+ CIRRUS_CR_CELL_HEIGHT = 0x09,
+ CIRRUS_CR_VSYNC_END = 0x11,
+ CIRRUS_CR_HEIGHT = 0x12,
+ CIRRUS_CR_PITCH = 0x13,
+ CIRRUS_CR_MODE = 0x17,
+ CIRRUS_CR_LINE_COMPARE = 0x18,
+ CIRRUS_CR_EXTENDED_DISPLAY = 0x1b,
+ CIRRUS_CR_MAX
+ };
+
+#define CIRRUS_CR_CELL_HEIGHT_LINE_COMPARE_MASK 0x40
+#define CIRRUS_CR_CELL_HEIGHT_LINE_COMPARE_SHIFT 3
+
+#define CIRRUS_CR_OVERFLOW_HEIGHT1_SHIFT 7
+#define CIRRUS_CR_OVERFLOW_HEIGHT1_MASK 0x02
+#define CIRRUS_CR_OVERFLOW_HEIGHT2_SHIFT 3
+#define CIRRUS_CR_OVERFLOW_HEIGHT2_MASK 0xc0
+#define CIRRUS_CR_OVERFLOW_LINE_COMPARE_MASK 0x10
+#define CIRRUS_CR_OVERFLOW_LINE_COMPARE_SHIFT 4
+
+#define CIRRUS_CR_EXTENDED_DISPLAY_PITCH_MASK 0x10
+#define CIRRUS_CR_EXTENDED_DISPLAY_PITCH_SHIFT 4
+
+#define CIRRUS_CR_MODE_TIMING_ENABLE 0x80
+#define CIRRUS_CR_MODE_BYTE_MODE 0x40
+#define CIRRUS_CR_MODE_NO_HERCULES 0x02
+#define CIRRUS_CR_MODE_NO_CGA 0x01
+
+enum
+ {
+ CIRRUS_SR_MEMORY_MODE = 4,
+ CIRRUS_SR_EXTENDED_MODE = 7,
+ CIRRUS_SR_MAX
+ };
+#define CIRRUS_SR_MEMORY_MODE_CHAIN4 8
+#define CIRRUS_SR_MEMORY_MODE_NORMAL 0
+#define CIRRUS_SR_EXTENDED_MODE_LFB_ENABLE 0xf0
+#define CIRRUS_SR_EXTENDED_MODE_ENABLE_EXT 0x01
+#define CIRRUS_SR_EXTENDED_MODE_24BPP 0x04
+#define CIRRUS_SR_EXTENDED_MODE_16BPP 0x06
+#define CIRRUS_SR_EXTENDED_MODE_32BPP 0x08
+
+static void
+gr_write (grub_uint8_t val, grub_uint8_t addr)
+{
+ grub_outb (addr, GR_INDEX);
+ grub_outb (val, GR_DATA);
+}
+
+static grub_uint8_t
+gr_read (grub_uint8_t addr)
+{
+ grub_outb (addr, GR_INDEX);
+ return grub_inb (GR_DATA);
+}
+
+static void
+cr_write (grub_uint8_t val, grub_uint8_t addr)
+{
+ grub_outb (addr, CR_INDEX);
+ grub_outb (val, CR_DATA);
+}
+
+static grub_uint8_t
+cr_read (grub_uint8_t addr)
+{
+ grub_outb (addr, CR_INDEX);
+ return grub_inb (CR_DATA);
+}
+
+static void
+sr_write (grub_uint8_t val, grub_uint8_t addr)
+{
+ grub_outb (addr, SR_INDEX);
+ grub_outb (val, SR_DATA);
+}
+
+static grub_uint8_t
+sr_read (grub_uint8_t addr)
+{
+ grub_outb (addr, SR_INDEX);
+ return grub_inb (SR_DATA);
+}
+
+static void
+write_hidden_dac (grub_uint8_t data)
+{
+ grub_inb (0x3c8);
+ grub_inb (0x3c6);
+ grub_inb (0x3c6);
+ grub_inb (0x3c6);
+ grub_inb (0x3c6);
+ grub_outb (data, 0x3c6);
+}
+
+static grub_uint8_t
+read_hidden_dac (void)
+{
+ grub_inb (0x3c8);
+ grub_inb (0x3c6);
+ grub_inb (0x3c6);
+ grub_inb (0x3c6);
+ grub_inb (0x3c6);
+ return grub_inb (0x3c6);
+}
+
+struct saved_state
+{
+ grub_uint8_t cr[CIRRUS_CR_MAX];
+ grub_uint8_t gr[CIRRUS_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];
+};
+
+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] = cr_read (i);
+ for (i = 0; i < ARRAY_SIZE (st->sr); i++)
+ st->sr[i] = sr_read (i);
+ for (i = 0; i < ARRAY_SIZE (st->gr); i++)
+ st->gr[i] = gr_read (i);
+ st->hidden_dac = read_hidden_dac ();
+ sr_write (CIRRUS_SR_MEMORY_MODE_CHAIN4, CIRRUS_SR_MEMORY_MODE);
+ grub_memcpy (st->vram, framebuffer.ptr, sizeof (st->vram));
+}
+
+static void
+restore_state (struct saved_state *st)
+{
+ unsigned i;
+ sr_write (CIRRUS_SR_MEMORY_MODE_CHAIN4, CIRRUS_SR_MEMORY_MODE);
+ grub_memcpy (framebuffer.ptr, st->vram, sizeof (st->vram));
+ for (i = 0; i < ARRAY_SIZE (st->cr); i++)
+ cr_write (st->cr[i], i);
+ for (i = 0; i < ARRAY_SIZE (st->sr); i++)
+ sr_write (st->sr[i], i);
+ for (i = 0; i < ARRAY_SIZE (st->gr); i++)
+ gr_write (st->gr[i], 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
+grub_video_cirrus_setup (unsigned int width, unsigned int height,
+ unsigned int mode_type, unsigned int mode_mask __attribute__ ((unused)))
+{
+ 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 & (CIRRUS_WIDTH_DIVISOR - 1))
+ return grub_error (GRUB_ERR_IO,
+ "screen width must be a multiple of %d",
+ CIRRUS_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)
+ depth = 24;
+
+ if (depth != 32 && depth != 24 && depth != 16 && depth != 15)
+ return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+ "only 32, 24, 16 and 15-bit bpp are supported");
+
+ 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);
+
+ 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 */
+ }
+
+ /* 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;
+ }
+
+ {
+ int pitch_reg, overflow_reg = 0, line_compare = 0x3ff;
+ grub_uint8_t sr_ext = 0;
+
+ pitch_reg = pitch / CIRRUS_WIDTH_DIVISOR;
+
+ gr_write (CIRRUS_GR_MODE_256_COLOR | CIRRUS_GR_MODE_READ_MODE1,
+ CIRRUS_GR_MODE);
+ gr_write (CIRRUS_GR_GR6_GRAPHICS_MODE, CIRRUS_GR_GR6);
+
+ sr_write (CIRRUS_SR_MEMORY_MODE_NORMAL, CIRRUS_SR_MEMORY_MODE);
+
+ /* Disable CR0-7 write protection. */
+ cr_write (0, CIRRUS_CR_VSYNC_END);
+
+ cr_write (width / CIRRUS_WIDTH_DIVISOR - 1, CIRRUS_CR_WIDTH);
+ cr_write ((height - 1) & 0xff, CIRRUS_CR_HEIGHT);
+ overflow_reg |= (((height - 1) >> CIRRUS_CR_OVERFLOW_HEIGHT1_SHIFT) &
+ CIRRUS_CR_OVERFLOW_HEIGHT1_MASK)
+ | (((height - 1) >> CIRRUS_CR_OVERFLOW_HEIGHT2_SHIFT) &
+ CIRRUS_CR_OVERFLOW_HEIGHT2_MASK);
+
+ cr_write (pitch_reg & 0xff, CIRRUS_CR_PITCH);
+
+ cr_write (line_compare & 0xff, CIRRUS_CR_LINE_COMPARE);
+ overflow_reg |= (line_compare >> CIRRUS_CR_OVERFLOW_LINE_COMPARE_SHIFT)
+ & CIRRUS_CR_OVERFLOW_LINE_COMPARE_MASK;
+
+ cr_write (overflow_reg, CIRRUS_CR_OVERFLOW);
+
+ cr_write ((pitch_reg >> CIRRUS_CR_EXTENDED_DISPLAY_PITCH_SHIFT)
+ & CIRRUS_CR_EXTENDED_DISPLAY_PITCH_MASK,
+ CIRRUS_CR_EXTENDED_DISPLAY);
+
+ cr_write ((line_compare >> CIRRUS_CR_CELL_HEIGHT_LINE_COMPARE_SHIFT)
+ & CIRRUS_CR_CELL_HEIGHT_LINE_COMPARE_MASK, CIRRUS_CR_CELL_HEIGHT);
+
+ cr_write (CIRRUS_CR_MODE_TIMING_ENABLE | CIRRUS_CR_MODE_BYTE_MODE
+ | CIRRUS_CR_MODE_NO_HERCULES | CIRRUS_CR_MODE_NO_CGA,
+ CIRRUS_CR_MODE);
+
+ sr_ext = CIRRUS_SR_EXTENDED_MODE_LFB_ENABLE
+ | CIRRUS_SR_EXTENDED_MODE_ENABLE_EXT;
+ switch (depth)
+ {
+ case 32:
+ sr_ext |= CIRRUS_SR_EXTENDED_MODE_32BPP;
+ break;
+ case 24:
+ sr_ext |= CIRRUS_SR_EXTENDED_MODE_24BPP;
+ break;
+ case 16:
+ case 15:
+ sr_ext |= CIRRUS_SR_EXTENDED_MODE_16BPP;
+ break;
+ }
+ sr_write (sr_ext, CIRRUS_SR_EXTENDED_MODE);
+ write_hidden_dac (depth == 16);
+ }
+
+ /* 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 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);
+
+ err = grub_video_fb_create_render_target_from_pointer (&framebuffer.render_target, &framebuffer.mode_info, framebuffer.ptr);
+
+ if (err)
+ return err;
+
+ err = grub_video_fb_set_active_render_target (framebuffer.render_target);
+
+ if (err)
+ return err;
+
+ /* Copy default palette to initialize emulated palette. */
+ err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
+ grub_video_fbstd_colors);
+ return err;
+}
+
+static grub_err_t
+grub_video_cirrus_set_palette (unsigned int start, unsigned int count,
+ struct grub_video_palette_data *palette_data)
+{
+ /* if (framebuffer.index_color_mode) */
+ {
+ /* TODO: Implement setting indexed color mode palette to hardware. */
+ }
+
+ /* Then set color to emulated palette. */
+ return grub_video_fb_set_palette (start, count, palette_data);
+}
+
+static grub_err_t
+grub_video_cirrus_swap_buffers (void)
+{
+ /* TODO: Implement buffer swapping. */
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_video_cirrus_set_active_render_target (struct grub_video_render_target *target)
+{
+ if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
+ target = framebuffer.render_target;
+
+ return grub_video_fb_set_active_render_target (target);
+}
+
+static grub_err_t
+grub_video_cirrus_get_info_and_fini (struct grub_video_mode_info *mode_info,
+ void **framebuf)
+{
+ grub_memcpy (mode_info, &(framebuffer.mode_info), sizeof (*mode_info));
+ *framebuf = (char *) framebuffer.ptr;
+
+ grub_video_fb_fini ();
+
+ return GRUB_ERR_NONE;
+}
+
+
+static struct grub_video_adapter grub_video_cirrus_adapter =
+ {
+ .name = "Cirrus CLGD 5446 PCI Video Driver",
+ .id = GRUB_VIDEO_DRIVER_CIRRUS,
+
+ .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_cirrus_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_cirrus_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_cirrus_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);
+}
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