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 #define LOG_CATEGORY UCLASS_PCI
26
27 #include <bios_emul.h>
28 #include <bloblist.h>
29 #include <bootstage.h>
30 #include <dm.h>
31 #include <errno.h>
32 #include <init.h>
33 #include <log.h>
34 #include <malloc.h>
35 #include <pci.h>
36 #include <pci_rom.h>
37 #include <spl.h>
38 #include <time.h>
39 #include <vesa.h>
40 #include <video.h>
41 #include <acpi/acpi_s3.h>
42 #include <asm/global_data.h>
43 #include <linux/screen_info.h>
44
45 DECLARE_GLOBAL_DATA_PTR;
46
board_should_run_oprom(struct udevice * dev)47 __weak bool board_should_run_oprom(struct udevice *dev)
48 {
49 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_ACPI_RESUME)
50 if (gd->arch.prev_sleep_state == ACPI_S3) {
51 if (IS_ENABLED(CONFIG_S3_VGA_ROM_RUN))
52 return true;
53 else
54 return false;
55 }
56 #endif
57
58 return true;
59 }
60
board_should_load_oprom(struct udevice * dev)61 __weak bool board_should_load_oprom(struct udevice *dev)
62 {
63 return true;
64 }
65
board_map_oprom_vendev(uint32_t vendev)66 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
67 {
68 return vendev;
69 }
70
pci_rom_probe(struct udevice * dev,struct pci_rom_header ** hdrp)71 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
72 {
73 struct pci_child_plat *pplat = dev_get_parent_plat(dev);
74 struct pci_rom_header *rom_header;
75 struct pci_rom_data *rom_data;
76 u16 rom_vendor, rom_device;
77 u32 rom_class;
78 u32 vendev;
79 u32 mapped_vendev;
80 u32 rom_address;
81
82 vendev = pplat->vendor << 16 | pplat->device;
83 mapped_vendev = board_map_oprom_vendev(vendev);
84 if (vendev != mapped_vendev)
85 debug("Device ID mapped to %#08x\n", mapped_vendev);
86
87 #ifdef CONFIG_VGA_BIOS_ADDR
88 rom_address = CONFIG_VGA_BIOS_ADDR;
89 #else
90
91 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address);
92 if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
93 debug("%s: rom_address=%x\n", __func__, rom_address);
94 return -ENOENT;
95 }
96 rom_address &= PCI_ROM_ADDRESS_MASK;
97
98 /* Enable expansion ROM address decoding. */
99 dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
100 rom_address | PCI_ROM_ADDRESS_ENABLE);
101 #endif
102 debug("Option ROM address %x\n", rom_address);
103 rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
104
105 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
106 le16_to_cpu(rom_header->signature),
107 rom_header->size * 512, le16_to_cpu(rom_header->data));
108
109 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
110 printf("Incorrect expansion ROM header signature %04x\n",
111 le16_to_cpu(rom_header->signature));
112 #ifndef CONFIG_VGA_BIOS_ADDR
113 /* Disable expansion ROM address decoding */
114 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address);
115 #endif
116 return -EINVAL;
117 }
118
119 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
120 rom_vendor = le16_to_cpu(rom_data->vendor);
121 rom_device = le16_to_cpu(rom_data->device);
122
123 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
124 rom_vendor, rom_device);
125
126 /* If the device id is mapped, a mismatch is expected */
127 if ((pplat->vendor != rom_vendor || pplat->device != rom_device) &&
128 (vendev == mapped_vendev)) {
129 printf("ID mismatch: vendor ID %04x, device ID %04x\n",
130 rom_vendor, rom_device);
131 /* Continue anyway */
132 }
133
134 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
135 debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
136 rom_class, rom_data->type);
137
138 if (pplat->class != rom_class) {
139 debug("Class Code mismatch ROM %06x, dev %06x\n",
140 rom_class, pplat->class);
141 }
142 *hdrp = rom_header;
143
144 return 0;
145 }
146
147 /**
148 * pci_rom_load() - Load a ROM image and return a pointer to it
149 *
150 * @rom_header: Pointer to ROM image
151 * @ram_headerp: Returns a pointer to the image in RAM
152 * @allocedp: Returns true if @ram_headerp was allocated and needs
153 * to be freed
154 * Return: 0 if OK, -ve on error. Note that @allocedp is set up regardless of
155 * the error state. Even if this function returns an error, it may have
156 * allocated memory.
157 */
pci_rom_load(struct pci_rom_header * rom_header,struct pci_rom_header ** ram_headerp,bool * allocedp)158 static int pci_rom_load(struct pci_rom_header *rom_header,
159 struct pci_rom_header **ram_headerp, bool *allocedp)
160 {
161 struct pci_rom_data *rom_data;
162 unsigned int rom_size;
163 unsigned int image_size = 0;
164 void *target;
165
166 *allocedp = false;
167 do {
168 /* Get next image, until we see an x86 version */
169 rom_header = (struct pci_rom_header *)((void *)rom_header +
170 image_size);
171
172 rom_data = (struct pci_rom_data *)((void *)rom_header +
173 le16_to_cpu(rom_header->data));
174
175 image_size = le16_to_cpu(rom_data->ilen) * 512;
176 } while ((rom_data->type != 0) && (rom_data->indicator == 0));
177
178 if (rom_data->type != 0)
179 return -EACCES;
180
181 rom_size = rom_header->size * 512;
182
183 #ifdef PCI_VGA_RAM_IMAGE_START
184 target = (void *)PCI_VGA_RAM_IMAGE_START;
185 #else
186 target = (void *)malloc(rom_size);
187 if (!target)
188 return -ENOMEM;
189 *allocedp = true;
190 #endif
191 if (target != rom_header) {
192 ulong start = get_timer(0);
193
194 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
195 rom_header, target, rom_size);
196 memcpy(target, rom_header, rom_size);
197 if (memcmp(target, rom_header, rom_size)) {
198 printf("VGA ROM copy failed\n");
199 return -EFAULT;
200 }
201 debug("Copy took %lums\n", get_timer(start));
202 }
203 *ram_headerp = target;
204
205 return 0;
206 }
207
208 struct vesa_state mode_info;
209
setup_video(struct screen_info * screen_info)210 void setup_video(struct screen_info *screen_info)
211 {
212 struct vesa_mode_info *vesa = &mode_info.vesa;
213
214 /* Sanity test on VESA parameters */
215 if (!vesa->x_resolution || !vesa->y_resolution)
216 return;
217
218 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
219
220 screen_info->lfb_width = vesa->x_resolution;
221 screen_info->lfb_height = vesa->y_resolution;
222 screen_info->lfb_depth = vesa->bits_per_pixel;
223 screen_info->lfb_linelength = vesa->bytes_per_scanline;
224 screen_info->lfb_base = vesa->phys_base_ptr;
225 screen_info->lfb_size =
226 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
227 65536);
228 screen_info->lfb_size >>= 16;
229 screen_info->red_size = vesa->red_mask_size;
230 screen_info->red_pos = vesa->red_mask_pos;
231 screen_info->green_size = vesa->green_mask_size;
232 screen_info->green_pos = vesa->green_mask_pos;
233 screen_info->blue_size = vesa->blue_mask_size;
234 screen_info->blue_pos = vesa->blue_mask_pos;
235 screen_info->rsvd_size = vesa->reserved_mask_size;
236 screen_info->rsvd_pos = vesa->reserved_mask_pos;
237 }
238
dm_pci_run_vga_bios(struct udevice * dev,int (* int15_handler)(void),int exec_method)239 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
240 int exec_method)
241 {
242 struct pci_child_plat *pplat = dev_get_parent_plat(dev);
243 struct pci_rom_header *rom = NULL, *ram = NULL;
244 int vesa_mode = -1;
245 bool emulate, alloced;
246 int ret;
247
248 /* Only execute VGA ROMs */
249 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
250 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class,
251 PCI_CLASS_DISPLAY_VGA);
252 return -ENODEV;
253 }
254
255 if (!board_should_load_oprom(dev))
256 return log_msg_ret("Should not load OPROM", -ENXIO);
257
258 ret = pci_rom_probe(dev, &rom);
259 if (ret)
260 return log_msg_ret("pro", ret);
261
262 ret = pci_rom_load(rom, &ram, &alloced);
263 if (ret) {
264 ret = log_msg_ret("ld", ret);
265 goto err;
266 }
267
268 if (!board_should_run_oprom(dev)) {
269 ret = log_msg_ret("run", -ENXIO);
270 goto err;
271 }
272
273 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
274 defined(CONFIG_FRAMEBUFFER_VESA_MODE)
275 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
276 #endif
277 debug("Selected vesa mode 0x%x\n", vesa_mode);
278
279 if (exec_method & PCI_ROM_USE_NATIVE) {
280 #ifdef CONFIG_X86
281 emulate = false;
282 #else
283 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
284 printf("BIOS native execution is only available on x86\n");
285 ret = -ENOSYS;
286 goto err;
287 }
288 emulate = true;
289 #endif
290 } else {
291 #ifdef CONFIG_BIOSEMU
292 emulate = true;
293 #else
294 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
295 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
296 ret = -ENOSYS;
297 goto err;
298 }
299 emulate = false;
300 #endif
301 }
302
303 if (emulate) {
304 if (CONFIG_IS_ENABLED(BIOSEMU)) {
305 BE_VGAInfo *info;
306
307 log_debug("Running video BIOS with emulator...");
308 ret = biosemu_setup(dev, &info);
309 if (ret)
310 goto err;
311 biosemu_set_interrupt_handler(0x15, int15_handler);
312 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
313 true, vesa_mode, &mode_info);
314 log_debug("done\n");
315 if (ret)
316 goto err;
317 }
318 } else {
319 #if defined(CONFIG_X86) && (CONFIG_IS_ENABLED(X86_32BIT_INIT) || CONFIG_TPL)
320 log_debug("Running video BIOS...");
321 bios_set_interrupt_handler(0x15, int15_handler);
322
323 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
324 &mode_info);
325 log_debug("done\n");
326 #endif
327 }
328 debug("Final vesa mode %x\n", mode_info.video_mode);
329 ret = 0;
330
331 err:
332 if (alloced)
333 free(ram);
334 return ret;
335 }
336
vesa_setup_video_priv(struct vesa_mode_info * vesa,u64 fb,struct video_priv * uc_priv,struct video_uc_plat * plat)337 int vesa_setup_video_priv(struct vesa_mode_info *vesa, u64 fb,
338 struct video_priv *uc_priv,
339 struct video_uc_plat *plat)
340 {
341 if (!vesa->x_resolution)
342 return log_msg_ret("No x resolution", -ENXIO);
343 uc_priv->xsize = vesa->x_resolution;
344 uc_priv->ysize = vesa->y_resolution;
345 uc_priv->line_length = vesa->bytes_per_scanline;
346 switch (vesa->bits_per_pixel) {
347 case 32:
348 case 24:
349 uc_priv->bpix = VIDEO_BPP32;
350 uc_priv->format = VIDEO_X8B8G8R8;
351 break;
352 case 16:
353 uc_priv->bpix = VIDEO_BPP16;
354 break;
355 default:
356 return -EPROTONOSUPPORT;
357 }
358
359 /* Use double buffering if enabled */
360 if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->base)
361 plat->copy_base = fb;
362 else
363 plat->base = fb;
364 log_debug("base = %lx, copy_base = %lx\n", plat->base, plat->copy_base);
365 plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
366
367 return 0;
368 }
369
vesa_setup_video(struct udevice * dev,int (* int15_handler)(void))370 int vesa_setup_video(struct udevice *dev, int (*int15_handler)(void))
371 {
372 struct video_uc_plat *plat = dev_get_uclass_plat(dev);
373 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
374 int ret;
375
376 /* If we are running from EFI or coreboot, this can't work */
377 if (!ll_boot_init()) {
378 printf("Not available (previous bootloader prevents it)\n");
379 return -EPERM;
380 }
381
382 /* In U-Boot proper, collect the information added by SPL (see below) */
383 if (IS_ENABLED(CONFIG_SPL_VIDEO) && xpl_phase() > PHASE_SPL &&
384 CONFIG_IS_ENABLED(BLOBLIST)) {
385 struct video_handoff *ho;
386
387 ho = bloblist_find(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho));
388 if (!ho)
389 return log_msg_ret("blf", -ENOENT);
390 plat->base = ho->fb;
391 plat->size = ho->size;
392 uc_priv->xsize = ho->xsize;
393 uc_priv->ysize = ho->ysize;
394 uc_priv->line_length = ho->line_length;
395 uc_priv->bpix = ho->bpix;
396 uc_priv->format = ho->format;
397 } else {
398 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
399 ret = dm_pci_run_vga_bios(dev, int15_handler,
400 PCI_ROM_USE_NATIVE |
401 PCI_ROM_ALLOW_FALLBACK);
402 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
403 if (ret) {
404 debug("failed to run video BIOS: %d\n", ret);
405 return ret;
406 }
407
408 ret = vesa_setup_video_priv(&mode_info.vesa,
409 mode_info.vesa.phys_base_ptr,
410 uc_priv, plat);
411 if (ret) {
412 if (ret == -ENFILE) {
413 /*
414 * See video-uclass.c for how to set up reserved
415 * memory in your video driver
416 */
417 log_err("CONFIG_VIDEO_COPY enabled but driver '%s' set up no reserved memory\n",
418 dev->driver->name);
419 }
420
421 debug("No video mode configured\n");
422 return ret;
423 }
424 }
425
426 printf("Video: %dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
427 mode_info.vesa.bits_per_pixel);
428
429 /* In SPL, store the information for use by U-Boot proper */
430 if (xpl_phase() == PHASE_SPL && CONFIG_IS_ENABLED(BLOBLIST)) {
431 struct video_handoff *ho;
432
433 ho = bloblist_add(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho), 0);
434 if (!ho)
435 return log_msg_ret("blc", -ENOMEM);
436
437 ho->fb = plat->base;
438 ho->size = plat->size;
439 ho->xsize = uc_priv->xsize;
440 ho->ysize = uc_priv->ysize;
441 ho->line_length = uc_priv->line_length;
442 ho->bpix = uc_priv->bpix;
443 ho->format = uc_priv->format;
444 }
445
446 return 0;
447 }
448