xref: /openbmc/u-boot/drivers/pci/pci_rom.c (revision 730d2544)
1 /*
2  * Copyright (C) 2014 Google, Inc
3  *
4  * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
5  *
6  * Modifications are:
7  * Copyright (C) 2003-2004 Linux Networx
8  * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
9  * Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com>
10  * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
11  * Copyright (C) 2005-2006 Tyan
12  * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
13  * Copyright (C) 2005-2009 coresystems GmbH
14  * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
15  *
16  * PCI Bus Services, see include/linux/pci.h for further explanation.
17  *
18  * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
19  * David Mosberger-Tang
20  *
21  * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
22 
23  * SPDX-License-Identifier:	GPL-2.0
24  */
25 
26 #include <common.h>
27 #include <bios_emul.h>
28 #include <dm.h>
29 #include <errno.h>
30 #include <malloc.h>
31 #include <pci.h>
32 #include <pci_rom.h>
33 #include <vbe.h>
34 #include <video.h>
35 #include <video_fb.h>
36 #include <linux/screen_info.h>
37 
38 __weak bool board_should_run_oprom(struct udevice *dev)
39 {
40 	return true;
41 }
42 
43 __weak bool board_should_load_oprom(struct udevice *dev)
44 {
45 	return true;
46 }
47 
48 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
49 {
50 	return vendev;
51 }
52 
53 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
54 {
55 	struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
56 	struct pci_rom_header *rom_header;
57 	struct pci_rom_data *rom_data;
58 	u16 rom_vendor, rom_device;
59 	u32 rom_class;
60 	u32 vendev;
61 	u32 mapped_vendev;
62 	u32 rom_address;
63 
64 	vendev = pplat->vendor << 16 | pplat->device;
65 	mapped_vendev = board_map_oprom_vendev(vendev);
66 	if (vendev != mapped_vendev)
67 		debug("Device ID mapped to %#08x\n", mapped_vendev);
68 
69 #ifdef CONFIG_VGA_BIOS_ADDR
70 	rom_address = CONFIG_VGA_BIOS_ADDR;
71 #else
72 
73 	dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address);
74 	if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
75 		debug("%s: rom_address=%x\n", __func__, rom_address);
76 		return -ENOENT;
77 	}
78 
79 	/* Enable expansion ROM address decoding. */
80 	dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
81 			      rom_address | PCI_ROM_ADDRESS_ENABLE);
82 #endif
83 	debug("Option ROM address %x\n", rom_address);
84 	rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
85 
86 	debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
87 	      le16_to_cpu(rom_header->signature),
88 	      rom_header->size * 512, le16_to_cpu(rom_header->data));
89 
90 	if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
91 		printf("Incorrect expansion ROM header signature %04x\n",
92 		       le16_to_cpu(rom_header->signature));
93 #ifndef CONFIG_VGA_BIOS_ADDR
94 		/* Disable expansion ROM address decoding */
95 		dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address);
96 #endif
97 		return -EINVAL;
98 	}
99 
100 	rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
101 	rom_vendor = le16_to_cpu(rom_data->vendor);
102 	rom_device = le16_to_cpu(rom_data->device);
103 
104 	debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
105 	      rom_vendor, rom_device);
106 
107 	/* If the device id is mapped, a mismatch is expected */
108 	if ((pplat->vendor != rom_vendor || pplat->device != rom_device) &&
109 	    (vendev == mapped_vendev)) {
110 		printf("ID mismatch: vendor ID %04x, device ID %04x\n",
111 		       rom_vendor, rom_device);
112 		/* Continue anyway */
113 	}
114 
115 	rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
116 	debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
117 	      rom_class, rom_data->type);
118 
119 	if (pplat->class != rom_class) {
120 		debug("Class Code mismatch ROM %06x, dev %06x\n",
121 		      rom_class, pplat->class);
122 	}
123 	*hdrp = rom_header;
124 
125 	return 0;
126 }
127 
128 /**
129  * pci_rom_load() - Load a ROM image and return a pointer to it
130  *
131  * @rom_header:		Pointer to ROM image
132  * @ram_headerp:	Returns a pointer to the image in RAM
133  * @allocedp:		Returns true if @ram_headerp was allocated and needs
134  *			to be freed
135  * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of
136  * the error state. Even if this function returns an error, it may have
137  * allocated memory.
138  */
139 static int pci_rom_load(struct pci_rom_header *rom_header,
140 			struct pci_rom_header **ram_headerp, bool *allocedp)
141 {
142 	struct pci_rom_data *rom_data;
143 	unsigned int rom_size;
144 	unsigned int image_size = 0;
145 	void *target;
146 
147 	*allocedp = false;
148 	do {
149 		/* Get next image, until we see an x86 version */
150 		rom_header = (struct pci_rom_header *)((void *)rom_header +
151 							    image_size);
152 
153 		rom_data = (struct pci_rom_data *)((void *)rom_header +
154 				le16_to_cpu(rom_header->data));
155 
156 		image_size = le16_to_cpu(rom_data->ilen) * 512;
157 	} while ((rom_data->type != 0) && (rom_data->indicator == 0));
158 
159 	if (rom_data->type != 0)
160 		return -EACCES;
161 
162 	rom_size = rom_header->size * 512;
163 
164 #ifdef PCI_VGA_RAM_IMAGE_START
165 	target = (void *)PCI_VGA_RAM_IMAGE_START;
166 #else
167 	target = (void *)malloc(rom_size);
168 	if (!target)
169 		return -ENOMEM;
170 	*allocedp = true;
171 #endif
172 	if (target != rom_header) {
173 		ulong start = get_timer(0);
174 
175 		debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
176 		      rom_header, target, rom_size);
177 		memcpy(target, rom_header, rom_size);
178 		if (memcmp(target, rom_header, rom_size)) {
179 			printf("VGA ROM copy failed\n");
180 			return -EFAULT;
181 		}
182 		debug("Copy took %lums\n", get_timer(start));
183 	}
184 	*ram_headerp = target;
185 
186 	return 0;
187 }
188 
189 struct vbe_mode_info mode_info;
190 
191 int vbe_get_video_info(struct graphic_device *gdev)
192 {
193 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
194 	struct vesa_mode_info *vesa = &mode_info.vesa;
195 
196 	gdev->winSizeX = vesa->x_resolution;
197 	gdev->winSizeY = vesa->y_resolution;
198 
199 	gdev->plnSizeX = vesa->x_resolution;
200 	gdev->plnSizeY = vesa->y_resolution;
201 
202 	gdev->gdfBytesPP = vesa->bits_per_pixel / 8;
203 
204 	switch (vesa->bits_per_pixel) {
205 	case 32:
206 	case 24:
207 		gdev->gdfIndex = GDF_32BIT_X888RGB;
208 		break;
209 	case 16:
210 		gdev->gdfIndex = GDF_16BIT_565RGB;
211 		break;
212 	default:
213 		gdev->gdfIndex = GDF__8BIT_INDEX;
214 		break;
215 	}
216 
217 	gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
218 	gdev->pciBase = vesa->phys_base_ptr;
219 
220 	gdev->frameAdrs = vesa->phys_base_ptr;
221 	gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution;
222 
223 	gdev->vprBase = vesa->phys_base_ptr;
224 	gdev->cprBase = vesa->phys_base_ptr;
225 
226 	return gdev->winSizeX ? 0 : -ENOSYS;
227 #else
228 	return -ENOSYS;
229 #endif
230 }
231 
232 void setup_video(struct screen_info *screen_info)
233 {
234 	struct vesa_mode_info *vesa = &mode_info.vesa;
235 
236 	/* Sanity test on VESA parameters */
237 	if (!vesa->x_resolution || !vesa->y_resolution)
238 		return;
239 
240 	screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
241 
242 	screen_info->lfb_width = vesa->x_resolution;
243 	screen_info->lfb_height = vesa->y_resolution;
244 	screen_info->lfb_depth = vesa->bits_per_pixel;
245 	screen_info->lfb_linelength = vesa->bytes_per_scanline;
246 	screen_info->lfb_base = vesa->phys_base_ptr;
247 	screen_info->lfb_size =
248 		ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
249 		      65536);
250 	screen_info->lfb_size >>= 16;
251 	screen_info->red_size = vesa->red_mask_size;
252 	screen_info->red_pos = vesa->red_mask_pos;
253 	screen_info->green_size = vesa->green_mask_size;
254 	screen_info->green_pos = vesa->green_mask_pos;
255 	screen_info->blue_size = vesa->blue_mask_size;
256 	screen_info->blue_pos = vesa->blue_mask_pos;
257 	screen_info->rsvd_size = vesa->reserved_mask_size;
258 	screen_info->rsvd_pos = vesa->reserved_mask_pos;
259 }
260 
261 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
262 			int exec_method)
263 {
264 	struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
265 	struct pci_rom_header *rom = NULL, *ram = NULL;
266 	int vesa_mode = -1;
267 	bool emulate, alloced;
268 	int ret;
269 
270 	/* Only execute VGA ROMs */
271 	if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
272 		debug("%s: Class %#x, should be %#x\n", __func__, pplat->class,
273 		      PCI_CLASS_DISPLAY_VGA);
274 		return -ENODEV;
275 	}
276 
277 	if (!board_should_load_oprom(dev))
278 		return -ENXIO;
279 
280 	ret = pci_rom_probe(dev, &rom);
281 	if (ret)
282 		return ret;
283 
284 	ret = pci_rom_load(rom, &ram, &alloced);
285 	if (ret)
286 		goto err;
287 
288 	if (!board_should_run_oprom(dev)) {
289 		ret = -ENXIO;
290 		goto err;
291 	}
292 
293 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
294 		defined(CONFIG_FRAMEBUFFER_VESA_MODE)
295 	vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
296 #endif
297 	debug("Selected vesa mode %#x\n", vesa_mode);
298 
299 	if (exec_method & PCI_ROM_USE_NATIVE) {
300 #ifdef CONFIG_X86
301 		emulate = false;
302 #else
303 		if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
304 			printf("BIOS native execution is only available on x86\n");
305 			ret = -ENOSYS;
306 			goto err;
307 		}
308 		emulate = true;
309 #endif
310 	} else {
311 #ifdef CONFIG_BIOSEMU
312 		emulate = true;
313 #else
314 		if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
315 			printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
316 			ret = -ENOSYS;
317 			goto err;
318 		}
319 		emulate = false;
320 #endif
321 	}
322 
323 	if (emulate) {
324 #ifdef CONFIG_BIOSEMU
325 		BE_VGAInfo *info;
326 
327 		ret = biosemu_setup(dev, &info);
328 		if (ret)
329 			goto err;
330 		biosemu_set_interrupt_handler(0x15, int15_handler);
331 		ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
332 				  true, vesa_mode, &mode_info);
333 		if (ret)
334 			goto err;
335 #endif
336 	} else {
337 #ifdef CONFIG_X86
338 		bios_set_interrupt_handler(0x15, int15_handler);
339 
340 		bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
341 				&mode_info);
342 #endif
343 	}
344 	debug("Final vesa mode %#x\n", mode_info.video_mode);
345 	ret = 0;
346 
347 err:
348 	if (alloced)
349 		free(ram);
350 	return ret;
351 }
352 
353 #ifdef CONFIG_DM_VIDEO
354 int vbe_setup_video_priv(struct vesa_mode_info *vesa,
355 			 struct video_priv *uc_priv,
356 			 struct video_uc_platdata *plat)
357 {
358 	if (!vesa->x_resolution)
359 		return -ENXIO;
360 	uc_priv->xsize = vesa->x_resolution;
361 	uc_priv->ysize = vesa->y_resolution;
362 	switch (vesa->bits_per_pixel) {
363 	case 32:
364 	case 24:
365 		uc_priv->bpix = VIDEO_BPP32;
366 		break;
367 	case 16:
368 		uc_priv->bpix = VIDEO_BPP16;
369 		break;
370 	default:
371 		return -EPROTONOSUPPORT;
372 	}
373 	plat->base = vesa->phys_base_ptr;
374 	plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
375 
376 	return 0;
377 }
378 
379 int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void))
380 {
381 	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
382 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
383 	int ret;
384 
385 	printf("Video: ");
386 
387 	/* If we are running from EFI or coreboot, this can't work */
388 	if (!ll_boot_init()) {
389 		printf("Not available (previous bootloader prevents it)\n");
390 		return -EPERM;
391 	}
392 	bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
393 	ret = dm_pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE |
394 					PCI_ROM_ALLOW_FALLBACK);
395 	bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
396 	if (ret) {
397 		debug("failed to run video BIOS: %d\n", ret);
398 		return ret;
399 	}
400 
401 	ret = vbe_setup_video_priv(&mode_info.vesa, uc_priv, plat);
402 	if (ret) {
403 		debug("No video mode configured\n");
404 		return ret;
405 	}
406 
407 	printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
408 	       mode_info.vesa.bits_per_pixel);
409 
410 	return 0;
411 }
412 #endif
413