1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2014 Google, Inc
4 *
5 * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
6 *
7 * Modifications are:
8 * Copyright (C) 2003-2004 Linux Networx
9 * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
10 * Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com>
11 * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
12 * Copyright (C) 2005-2006 Tyan
13 * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
14 * Copyright (C) 2005-2009 coresystems GmbH
15 * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
16 *
17 * PCI Bus Services, see include/linux/pci.h for further explanation.
18 *
19 * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
20 * David Mosberger-Tang
21 *
22 * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
23 */
24
25 #include <common.h>
26 #include <bios_emul.h>
27 #include <bootstage.h>
28 #include <dm.h>
29 #include <errno.h>
30 #include <init.h>
31 #include <log.h>
32 #include <malloc.h>
33 #include <pci.h>
34 #include <pci_rom.h>
35 #include <vbe.h>
36 #include <video.h>
37 #include <video_fb.h>
38 #include <acpi/acpi_s3.h>
39 #include <linux/screen_info.h>
40
41 DECLARE_GLOBAL_DATA_PTR;
42
board_should_run_oprom(struct udevice * dev)43 __weak bool board_should_run_oprom(struct udevice *dev)
44 {
45 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_ACPI_RESUME)
46 if (gd->arch.prev_sleep_state == ACPI_S3) {
47 if (IS_ENABLED(CONFIG_S3_VGA_ROM_RUN))
48 return true;
49 else
50 return false;
51 }
52 #endif
53
54 return true;
55 }
56
board_should_load_oprom(struct udevice * dev)57 __weak bool board_should_load_oprom(struct udevice *dev)
58 {
59 return true;
60 }
61
board_map_oprom_vendev(uint32_t vendev)62 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
63 {
64 return vendev;
65 }
66
pci_rom_probe(struct udevice * dev,struct pci_rom_header ** hdrp)67 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
68 {
69 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
70 struct pci_rom_header *rom_header;
71 struct pci_rom_data *rom_data;
72 u16 rom_vendor, rom_device;
73 u32 rom_class;
74 u32 vendev;
75 u32 mapped_vendev;
76 u32 rom_address;
77
78 vendev = pplat->vendor << 16 | pplat->device;
79 mapped_vendev = board_map_oprom_vendev(vendev);
80 if (vendev != mapped_vendev)
81 debug("Device ID mapped to %#08x\n", mapped_vendev);
82
83 #ifdef CONFIG_VGA_BIOS_ADDR
84 rom_address = CONFIG_VGA_BIOS_ADDR;
85 #else
86
87 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address);
88 if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
89 debug("%s: rom_address=%x\n", __func__, rom_address);
90 return -ENOENT;
91 }
92
93 /* Enable expansion ROM address decoding. */
94 dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
95 rom_address | PCI_ROM_ADDRESS_ENABLE);
96 #endif
97 debug("Option ROM address %x\n", rom_address);
98 rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
99
100 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
101 le16_to_cpu(rom_header->signature),
102 rom_header->size * 512, le16_to_cpu(rom_header->data));
103
104 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
105 printf("Incorrect expansion ROM header signature %04x\n",
106 le16_to_cpu(rom_header->signature));
107 #ifndef CONFIG_VGA_BIOS_ADDR
108 /* Disable expansion ROM address decoding */
109 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address);
110 #endif
111 return -EINVAL;
112 }
113
114 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
115 rom_vendor = le16_to_cpu(rom_data->vendor);
116 rom_device = le16_to_cpu(rom_data->device);
117
118 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
119 rom_vendor, rom_device);
120
121 /* If the device id is mapped, a mismatch is expected */
122 if ((pplat->vendor != rom_vendor || pplat->device != rom_device) &&
123 (vendev == mapped_vendev)) {
124 printf("ID mismatch: vendor ID %04x, device ID %04x\n",
125 rom_vendor, rom_device);
126 /* Continue anyway */
127 }
128
129 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
130 debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
131 rom_class, rom_data->type);
132
133 if (pplat->class != rom_class) {
134 debug("Class Code mismatch ROM %06x, dev %06x\n",
135 rom_class, pplat->class);
136 }
137 *hdrp = rom_header;
138
139 return 0;
140 }
141
142 /**
143 * pci_rom_load() - Load a ROM image and return a pointer to it
144 *
145 * @rom_header: Pointer to ROM image
146 * @ram_headerp: Returns a pointer to the image in RAM
147 * @allocedp: Returns true if @ram_headerp was allocated and needs
148 * to be freed
149 * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of
150 * the error state. Even if this function returns an error, it may have
151 * allocated memory.
152 */
pci_rom_load(struct pci_rom_header * rom_header,struct pci_rom_header ** ram_headerp,bool * allocedp)153 static int pci_rom_load(struct pci_rom_header *rom_header,
154 struct pci_rom_header **ram_headerp, bool *allocedp)
155 {
156 struct pci_rom_data *rom_data;
157 unsigned int rom_size;
158 unsigned int image_size = 0;
159 void *target;
160
161 *allocedp = false;
162 do {
163 /* Get next image, until we see an x86 version */
164 rom_header = (struct pci_rom_header *)((void *)rom_header +
165 image_size);
166
167 rom_data = (struct pci_rom_data *)((void *)rom_header +
168 le16_to_cpu(rom_header->data));
169
170 image_size = le16_to_cpu(rom_data->ilen) * 512;
171 } while ((rom_data->type != 0) && (rom_data->indicator == 0));
172
173 if (rom_data->type != 0)
174 return -EACCES;
175
176 rom_size = rom_header->size * 512;
177
178 #ifdef PCI_VGA_RAM_IMAGE_START
179 target = (void *)PCI_VGA_RAM_IMAGE_START;
180 #else
181 target = (void *)malloc(rom_size);
182 if (!target)
183 return -ENOMEM;
184 *allocedp = true;
185 #endif
186 if (target != rom_header) {
187 ulong start = get_timer(0);
188
189 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
190 rom_header, target, rom_size);
191 memcpy(target, rom_header, rom_size);
192 if (memcmp(target, rom_header, rom_size)) {
193 printf("VGA ROM copy failed\n");
194 return -EFAULT;
195 }
196 debug("Copy took %lums\n", get_timer(start));
197 }
198 *ram_headerp = target;
199
200 return 0;
201 }
202
203 struct vbe_mode_info mode_info;
204
setup_video(struct screen_info * screen_info)205 void setup_video(struct screen_info *screen_info)
206 {
207 struct vesa_mode_info *vesa = &mode_info.vesa;
208
209 /* Sanity test on VESA parameters */
210 if (!vesa->x_resolution || !vesa->y_resolution)
211 return;
212
213 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
214
215 screen_info->lfb_width = vesa->x_resolution;
216 screen_info->lfb_height = vesa->y_resolution;
217 screen_info->lfb_depth = vesa->bits_per_pixel;
218 screen_info->lfb_linelength = vesa->bytes_per_scanline;
219 screen_info->lfb_base = vesa->phys_base_ptr;
220 screen_info->lfb_size =
221 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
222 65536);
223 screen_info->lfb_size >>= 16;
224 screen_info->red_size = vesa->red_mask_size;
225 screen_info->red_pos = vesa->red_mask_pos;
226 screen_info->green_size = vesa->green_mask_size;
227 screen_info->green_pos = vesa->green_mask_pos;
228 screen_info->blue_size = vesa->blue_mask_size;
229 screen_info->blue_pos = vesa->blue_mask_pos;
230 screen_info->rsvd_size = vesa->reserved_mask_size;
231 screen_info->rsvd_pos = vesa->reserved_mask_pos;
232 }
233
dm_pci_run_vga_bios(struct udevice * dev,int (* int15_handler)(void),int exec_method)234 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
235 int exec_method)
236 {
237 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
238 struct pci_rom_header *rom = NULL, *ram = NULL;
239 int vesa_mode = -1;
240 bool emulate, alloced;
241 int ret;
242
243 /* Only execute VGA ROMs */
244 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
245 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class,
246 PCI_CLASS_DISPLAY_VGA);
247 return -ENODEV;
248 }
249
250 if (!board_should_load_oprom(dev))
251 return log_msg_ret("Should not load OPROM", -ENXIO);
252
253 ret = pci_rom_probe(dev, &rom);
254 if (ret)
255 return ret;
256
257 ret = pci_rom_load(rom, &ram, &alloced);
258 if (ret)
259 goto err;
260
261 if (!board_should_run_oprom(dev)) {
262 ret = -ENXIO;
263 goto err;
264 }
265
266 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
267 defined(CONFIG_FRAMEBUFFER_VESA_MODE)
268 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
269 #endif
270 debug("Selected vesa mode %#x\n", vesa_mode);
271
272 if (exec_method & PCI_ROM_USE_NATIVE) {
273 #ifdef CONFIG_X86
274 emulate = false;
275 #else
276 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
277 printf("BIOS native execution is only available on x86\n");
278 ret = -ENOSYS;
279 goto err;
280 }
281 emulate = true;
282 #endif
283 } else {
284 #ifdef CONFIG_BIOSEMU
285 emulate = true;
286 #else
287 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
288 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
289 ret = -ENOSYS;
290 goto err;
291 }
292 emulate = false;
293 #endif
294 }
295
296 if (emulate) {
297 #ifdef CONFIG_BIOSEMU
298 BE_VGAInfo *info;
299
300 ret = biosemu_setup(dev, &info);
301 if (ret)
302 goto err;
303 biosemu_set_interrupt_handler(0x15, int15_handler);
304 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
305 true, vesa_mode, &mode_info);
306 if (ret)
307 goto err;
308 #endif
309 } else {
310 #if defined(CONFIG_X86) && (CONFIG_IS_ENABLED(X86_32BIT_INIT) || CONFIG_TPL)
311 bios_set_interrupt_handler(0x15, int15_handler);
312
313 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
314 &mode_info);
315 #endif
316 }
317 debug("Final vesa mode %#x\n", mode_info.video_mode);
318 ret = 0;
319
320 err:
321 if (alloced)
322 free(ram);
323 return ret;
324 }
325
326 #ifdef CONFIG_DM_VIDEO
vbe_setup_video_priv(struct vesa_mode_info * vesa,struct video_priv * uc_priv,struct video_uc_platdata * plat)327 int vbe_setup_video_priv(struct vesa_mode_info *vesa,
328 struct video_priv *uc_priv,
329 struct video_uc_platdata *plat)
330 {
331 if (!vesa->x_resolution)
332 return log_msg_ret("No x resolution", -ENXIO);
333 uc_priv->xsize = vesa->x_resolution;
334 uc_priv->ysize = vesa->y_resolution;
335 uc_priv->line_length = vesa->bytes_per_scanline;
336 switch (vesa->bits_per_pixel) {
337 case 32:
338 case 24:
339 uc_priv->bpix = VIDEO_BPP32;
340 break;
341 case 16:
342 uc_priv->bpix = VIDEO_BPP16;
343 break;
344 default:
345 return -EPROTONOSUPPORT;
346 }
347 plat->base = vesa->phys_base_ptr;
348 plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
349
350 return 0;
351 }
352
vbe_setup_video(struct udevice * dev,int (* int15_handler)(void))353 int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void))
354 {
355 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
356 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
357 int ret;
358
359 /* If we are running from EFI or coreboot, this can't work */
360 if (!ll_boot_init()) {
361 printf("Not available (previous bootloader prevents it)\n");
362 return -EPERM;
363 }
364 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
365 ret = dm_pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE |
366 PCI_ROM_ALLOW_FALLBACK);
367 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
368 if (ret) {
369 debug("failed to run video BIOS: %d\n", ret);
370 return ret;
371 }
372
373 ret = vbe_setup_video_priv(&mode_info.vesa, uc_priv, plat);
374 if (ret) {
375 debug("No video mode configured\n");
376 return ret;
377 }
378
379 printf("Video: %dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
380 mode_info.vesa.bits_per_pixel);
381
382 return 0;
383 }
384 #endif
385