Prepare v2023.10
[platform/kernel/u-boot.git] / drivers / pci / pci_rom.c
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 <bloblist.h>
30 #include <bootstage.h>
31 #include <dm.h>
32 #include <errno.h>
33 #include <init.h>
34 #include <log.h>
35 #include <malloc.h>
36 #include <pci.h>
37 #include <pci_rom.h>
38 #include <spl.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
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
61 __weak bool board_should_load_oprom(struct udevice *dev)
62 {
63         return true;
64 }
65
66 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
67 {
68         return vendev;
69 }
70
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  */
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
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
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
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                 break;
351         case 16:
352                 uc_priv->bpix = VIDEO_BPP16;
353                 break;
354         default:
355                 return -EPROTONOSUPPORT;
356         }
357
358         /* Use double buffering if enabled */
359         if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->base)
360                 plat->copy_base = fb;
361         else
362                 plat->base = fb;
363         log_debug("base = %lx, copy_base = %lx\n", plat->base, plat->copy_base);
364         plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
365
366         return 0;
367 }
368
369 int vesa_setup_video(struct udevice *dev, int (*int15_handler)(void))
370 {
371         struct video_uc_plat *plat = dev_get_uclass_plat(dev);
372         struct video_priv *uc_priv = dev_get_uclass_priv(dev);
373         int ret;
374
375         /* If we are running from EFI or coreboot, this can't work */
376         if (!ll_boot_init()) {
377                 printf("Not available (previous bootloader prevents it)\n");
378                 return -EPERM;
379         }
380
381         /* In U-Boot proper, collect the information added by SPL (see below) */
382         if (IS_ENABLED(CONFIG_SPL_VIDEO) && spl_phase() > PHASE_SPL &&
383             CONFIG_IS_ENABLED(BLOBLIST)) {
384                 struct video_handoff *ho;
385
386                 ho = bloblist_find(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho));
387                 if (!ho)
388                         return log_msg_ret("blf", -ENOENT);
389                 plat->base = ho->fb;
390                 plat->size = ho->size;
391                 uc_priv->xsize = ho->xsize;
392                 uc_priv->ysize = ho->ysize;
393                 uc_priv->line_length = ho->line_length;
394                 uc_priv->bpix = ho->bpix;
395         } else {
396                 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
397                 ret = dm_pci_run_vga_bios(dev, int15_handler,
398                                           PCI_ROM_USE_NATIVE |
399                                           PCI_ROM_ALLOW_FALLBACK);
400                 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
401                 if (ret) {
402                         debug("failed to run video BIOS: %d\n", ret);
403                         return ret;
404                 }
405
406                 ret = vesa_setup_video_priv(&mode_info.vesa,
407                                             mode_info.vesa.phys_base_ptr,
408                                             uc_priv, plat);
409                 if (ret) {
410                         if (ret == -ENFILE) {
411                                 /*
412                                  * See video-uclass.c for how to set up reserved
413                                  * memory in your video driver
414                                  */
415                                 log_err("CONFIG_VIDEO_COPY enabled but driver '%s' set up no reserved memory\n",
416                                         dev->driver->name);
417                         }
418
419                         debug("No video mode configured\n");
420                         return ret;
421                 }
422         }
423
424         printf("Video: %dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
425                mode_info.vesa.bits_per_pixel);
426
427         /* In SPL, store the information for use by U-Boot proper */
428         if (spl_phase() == PHASE_SPL && CONFIG_IS_ENABLED(BLOBLIST)) {
429                 struct video_handoff *ho;
430
431                 ho = bloblist_add(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho), 0);
432                 if (!ho)
433                         return log_msg_ret("blc", -ENOMEM);
434
435                 ho->fb = plat->base;
436                 ho->size = plat->size;
437                 ho->xsize = uc_priv->xsize;
438                 ho->ysize = uc_priv->ysize;
439                 ho->line_length = uc_priv->line_length;
440                 ho->bpix = uc_priv->bpix;
441         }
442
443         return 0;
444 }