xref: /openbmc/u-boot/drivers/pci/pci_rom.c (revision ee7bb5be)
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_fb.h>
35 #include <linux/screen_info.h>
36 
37 __weak bool board_should_run_oprom(struct udevice *dev)
38 {
39 	return true;
40 }
41 
42 static bool should_load_oprom(struct udevice *dev)
43 {
44 	if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM))
45 		return 1;
46 	if (board_should_run_oprom(dev))
47 		return 1;
48 
49 	return 0;
50 }
51 
52 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
53 {
54 	return vendev;
55 }
56 
57 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
58 {
59 	struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
60 	struct pci_rom_header *rom_header;
61 	struct pci_rom_data *rom_data;
62 	u16 rom_vendor, rom_device;
63 	u32 rom_class;
64 	u32 vendev;
65 	u32 mapped_vendev;
66 	u32 rom_address;
67 
68 	vendev = pplat->vendor << 16 | pplat->device;
69 	mapped_vendev = board_map_oprom_vendev(vendev);
70 	if (vendev != mapped_vendev)
71 		debug("Device ID mapped to %#08x\n", mapped_vendev);
72 
73 #ifdef CONFIG_VGA_BIOS_ADDR
74 	rom_address = CONFIG_VGA_BIOS_ADDR;
75 #else
76 
77 	dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address);
78 	if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
79 		debug("%s: rom_address=%x\n", __func__, rom_address);
80 		return -ENOENT;
81 	}
82 
83 	/* Enable expansion ROM address decoding. */
84 	dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
85 			      rom_address | PCI_ROM_ADDRESS_ENABLE);
86 #endif
87 	debug("Option ROM address %x\n", rom_address);
88 	rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
89 
90 	debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
91 	      le16_to_cpu(rom_header->signature),
92 	      rom_header->size * 512, le16_to_cpu(rom_header->data));
93 
94 	if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
95 		printf("Incorrect expansion ROM header signature %04x\n",
96 		       le16_to_cpu(rom_header->signature));
97 #ifndef CONFIG_VGA_BIOS_ADDR
98 		/* Disable expansion ROM address decoding */
99 		dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address);
100 #endif
101 		return -EINVAL;
102 	}
103 
104 	rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
105 	rom_vendor = le16_to_cpu(rom_data->vendor);
106 	rom_device = le16_to_cpu(rom_data->device);
107 
108 	debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
109 	      rom_vendor, rom_device);
110 
111 	/* If the device id is mapped, a mismatch is expected */
112 	if ((pplat->vendor != rom_vendor || pplat->device != rom_device) &&
113 	    (vendev == mapped_vendev)) {
114 		printf("ID mismatch: vendor ID %04x, device ID %04x\n",
115 		       rom_vendor, rom_device);
116 		/* Continue anyway */
117 	}
118 
119 	rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
120 	debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
121 	      rom_class, rom_data->type);
122 
123 	if (pplat->class != rom_class) {
124 		debug("Class Code mismatch ROM %06x, dev %06x\n",
125 		      rom_class, pplat->class);
126 	}
127 	*hdrp = rom_header;
128 
129 	return 0;
130 }
131 
132 /**
133  * pci_rom_load() - Load a ROM image and return a pointer to it
134  *
135  * @rom_header:		Pointer to ROM image
136  * @ram_headerp:	Returns a pointer to the image in RAM
137  * @allocedp:		Returns true if @ram_headerp was allocated and needs
138  *			to be freed
139  * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of
140  * the error state. Even if this function returns an error, it may have
141  * allocated memory.
142  */
143 static int pci_rom_load(struct pci_rom_header *rom_header,
144 			struct pci_rom_header **ram_headerp, bool *allocedp)
145 {
146 	struct pci_rom_data *rom_data;
147 	unsigned int rom_size;
148 	unsigned int image_size = 0;
149 	void *target;
150 
151 	*allocedp = false;
152 	do {
153 		/* Get next image, until we see an x86 version */
154 		rom_header = (struct pci_rom_header *)((void *)rom_header +
155 							    image_size);
156 
157 		rom_data = (struct pci_rom_data *)((void *)rom_header +
158 				le16_to_cpu(rom_header->data));
159 
160 		image_size = le16_to_cpu(rom_data->ilen) * 512;
161 	} while ((rom_data->type != 0) && (rom_data->indicator == 0));
162 
163 	if (rom_data->type != 0)
164 		return -EACCES;
165 
166 	rom_size = rom_header->size * 512;
167 
168 #ifdef PCI_VGA_RAM_IMAGE_START
169 	target = (void *)PCI_VGA_RAM_IMAGE_START;
170 #else
171 	target = (void *)malloc(rom_size);
172 	if (!target)
173 		return -ENOMEM;
174 	*allocedp = true;
175 #endif
176 	if (target != rom_header) {
177 		ulong start = get_timer(0);
178 
179 		debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
180 		      rom_header, target, rom_size);
181 		memcpy(target, rom_header, rom_size);
182 		if (memcmp(target, rom_header, rom_size)) {
183 			printf("VGA ROM copy failed\n");
184 			return -EFAULT;
185 		}
186 		debug("Copy took %lums\n", get_timer(start));
187 	}
188 	*ram_headerp = target;
189 
190 	return 0;
191 }
192 
193 struct vbe_mode_info mode_info;
194 
195 int vbe_get_video_info(struct graphic_device *gdev)
196 {
197 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
198 	struct vesa_mode_info *vesa = &mode_info.vesa;
199 
200 	gdev->winSizeX = vesa->x_resolution;
201 	gdev->winSizeY = vesa->y_resolution;
202 
203 	gdev->plnSizeX = vesa->x_resolution;
204 	gdev->plnSizeY = vesa->y_resolution;
205 
206 	gdev->gdfBytesPP = vesa->bits_per_pixel / 8;
207 
208 	switch (vesa->bits_per_pixel) {
209 	case 32:
210 	case 24:
211 		gdev->gdfIndex = GDF_32BIT_X888RGB;
212 		break;
213 	case 16:
214 		gdev->gdfIndex = GDF_16BIT_565RGB;
215 		break;
216 	default:
217 		gdev->gdfIndex = GDF__8BIT_INDEX;
218 		break;
219 	}
220 
221 	gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
222 	gdev->pciBase = vesa->phys_base_ptr;
223 
224 	gdev->frameAdrs = vesa->phys_base_ptr;
225 	gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution;
226 
227 	gdev->vprBase = vesa->phys_base_ptr;
228 	gdev->cprBase = vesa->phys_base_ptr;
229 
230 	return gdev->winSizeX ? 0 : -ENOSYS;
231 #else
232 	return -ENOSYS;
233 #endif
234 }
235 
236 void setup_video(struct screen_info *screen_info)
237 {
238 	struct vesa_mode_info *vesa = &mode_info.vesa;
239 
240 	/* Sanity test on VESA parameters */
241 	if (!vesa->x_resolution || !vesa->y_resolution)
242 		return;
243 
244 	screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
245 
246 	screen_info->lfb_width = vesa->x_resolution;
247 	screen_info->lfb_height = vesa->y_resolution;
248 	screen_info->lfb_depth = vesa->bits_per_pixel;
249 	screen_info->lfb_linelength = vesa->bytes_per_scanline;
250 	screen_info->lfb_base = vesa->phys_base_ptr;
251 	screen_info->lfb_size =
252 		ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
253 		      65536);
254 	screen_info->lfb_size >>= 16;
255 	screen_info->red_size = vesa->red_mask_size;
256 	screen_info->red_pos = vesa->red_mask_pos;
257 	screen_info->green_size = vesa->green_mask_size;
258 	screen_info->green_pos = vesa->green_mask_pos;
259 	screen_info->blue_size = vesa->blue_mask_size;
260 	screen_info->blue_pos = vesa->blue_mask_pos;
261 	screen_info->rsvd_size = vesa->reserved_mask_size;
262 	screen_info->rsvd_pos = vesa->reserved_mask_pos;
263 }
264 
265 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
266 			int exec_method)
267 {
268 	struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
269 	struct pci_rom_header *rom = NULL, *ram = NULL;
270 	int vesa_mode = -1;
271 	bool emulate, alloced;
272 	int ret;
273 
274 	/* Only execute VGA ROMs */
275 	if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
276 		debug("%s: Class %#x, should be %#x\n", __func__, pplat->class,
277 		      PCI_CLASS_DISPLAY_VGA);
278 		return -ENODEV;
279 	}
280 
281 	if (!should_load_oprom(dev))
282 		return -ENXIO;
283 
284 	ret = pci_rom_probe(dev, &rom);
285 	if (ret)
286 		return ret;
287 
288 	ret = pci_rom_load(rom, &ram, &alloced);
289 	if (ret)
290 		goto err;
291 
292 	if (!board_should_run_oprom(dev)) {
293 		ret = -ENXIO;
294 		goto err;
295 	}
296 
297 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
298 		defined(CONFIG_FRAMEBUFFER_VESA_MODE)
299 	vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
300 #endif
301 	debug("Selected vesa mode %#x\n", vesa_mode);
302 
303 	if (exec_method & PCI_ROM_USE_NATIVE) {
304 #ifdef CONFIG_X86
305 		emulate = false;
306 #else
307 		if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
308 			printf("BIOS native execution is only available on x86\n");
309 			ret = -ENOSYS;
310 			goto err;
311 		}
312 		emulate = true;
313 #endif
314 	} else {
315 #ifdef CONFIG_BIOSEMU
316 		emulate = true;
317 #else
318 		if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
319 			printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
320 			ret = -ENOSYS;
321 			goto err;
322 		}
323 		emulate = false;
324 #endif
325 	}
326 
327 	if (emulate) {
328 #ifdef CONFIG_BIOSEMU
329 		BE_VGAInfo *info;
330 
331 		ret = biosemu_setup(dev, &info);
332 		if (ret)
333 			goto err;
334 		biosemu_set_interrupt_handler(0x15, int15_handler);
335 		ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
336 				  true, vesa_mode, &mode_info);
337 		if (ret)
338 			goto err;
339 #endif
340 	} else {
341 #ifdef CONFIG_X86
342 		bios_set_interrupt_handler(0x15, int15_handler);
343 
344 		bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
345 				&mode_info);
346 #endif
347 	}
348 	debug("Final vesa mode %#x\n", mode_info.video_mode);
349 	ret = 0;
350 
351 err:
352 	if (alloced)
353 		free(ram);
354 	return ret;
355 }
356