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