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1 /*
2  * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
3  *
4  * Authors: Igor Grinberg <grinberg@compulab.co.il>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <bmp_layout.h>
11 #include <errno.h>
12 #include <fs.h>
13 #include <fdt_support.h>
14 #include <image.h>
15 #include <nand.h>
16 #include <sata.h>
17 #include <spi.h>
18 #include <spi_flash.h>
19 #include <splash.h>
20 #include <usb.h>
21
22 DECLARE_GLOBAL_DATA_PTR;
23
24 #ifdef CONFIG_SPI_FLASH
25 static struct spi_flash *sf;
26 static int splash_sf_read_raw(u32 bmp_load_addr, int offset, size_t read_size)
27 {
28         if (!sf) {
29                 sf = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
30                                      CONFIG_SF_DEFAULT_CS,
31                                      CONFIG_SF_DEFAULT_SPEED,
32                                      CONFIG_SF_DEFAULT_MODE);
33                 if (!sf)
34                         return -ENODEV;
35         }
36
37         return spi_flash_read(sf, offset, read_size, (void *)bmp_load_addr);
38 }
39 #else
40 static int splash_sf_read_raw(u32 bmp_load_addr, int offset, size_t read_size)
41 {
42         debug("%s: sf support not available\n", __func__);
43         return -ENOSYS;
44 }
45 #endif
46
47 #ifdef CONFIG_CMD_NAND
48 static int splash_nand_read_raw(u32 bmp_load_addr, int offset, size_t read_size)
49 {
50         struct mtd_info *mtd = get_nand_dev_by_index(nand_curr_device);
51         return nand_read_skip_bad(mtd, offset,
52                                   &read_size, NULL,
53                                   mtd->size,
54                                   (u_char *)bmp_load_addr);
55 }
56 #else
57 static int splash_nand_read_raw(u32 bmp_load_addr, int offset, size_t read_size)
58 {
59         debug("%s: nand support not available\n", __func__);
60         return -ENOSYS;
61 }
62 #endif
63
64 static int splash_storage_read_raw(struct splash_location *location,
65                                u32 bmp_load_addr, size_t read_size)
66 {
67         u32 offset;
68
69         if (!location)
70                 return -EINVAL;
71
72         offset = location->offset;
73         switch (location->storage) {
74         case SPLASH_STORAGE_NAND:
75                 return splash_nand_read_raw(bmp_load_addr, offset, read_size);
76         case SPLASH_STORAGE_SF:
77                 return splash_sf_read_raw(bmp_load_addr, offset, read_size);
78         default:
79                 printf("Unknown splash location\n");
80         }
81
82         return -EINVAL;
83 }
84
85 static int splash_load_raw(struct splash_location *location, u32 bmp_load_addr)
86 {
87         struct bmp_header *bmp_hdr;
88         int res;
89         size_t bmp_size, bmp_header_size = sizeof(struct bmp_header);
90
91         if (bmp_load_addr + bmp_header_size >= gd->start_addr_sp)
92                 goto splash_address_too_high;
93
94         res = splash_storage_read_raw(location, bmp_load_addr, bmp_header_size);
95         if (res < 0)
96                 return res;
97
98         bmp_hdr = (struct bmp_header *)bmp_load_addr;
99         bmp_size = le32_to_cpu(bmp_hdr->file_size);
100
101         if (bmp_load_addr + bmp_size >= gd->start_addr_sp)
102                 goto splash_address_too_high;
103
104         return splash_storage_read_raw(location, bmp_load_addr, bmp_size);
105
106 splash_address_too_high:
107         printf("Error: splashimage address too high. Data overwrites U-Boot and/or placed beyond DRAM boundaries.\n");
108
109         return -EFAULT;
110 }
111
112 static int splash_select_fs_dev(struct splash_location *location)
113 {
114         int res;
115
116         switch (location->storage) {
117         case SPLASH_STORAGE_MMC:
118                 res = fs_set_blk_dev("mmc", location->devpart, FS_TYPE_ANY);
119                 break;
120         case SPLASH_STORAGE_USB:
121                 res = fs_set_blk_dev("usb", location->devpart, FS_TYPE_ANY);
122                 break;
123         case SPLASH_STORAGE_SATA:
124                 res = fs_set_blk_dev("sata", location->devpart, FS_TYPE_ANY);
125                 break;
126         case SPLASH_STORAGE_NAND:
127                 if (location->ubivol != NULL)
128                         res = fs_set_blk_dev("ubi", NULL, FS_TYPE_UBIFS);
129                 else
130                         res = -ENODEV;
131                 break;
132         default:
133                 printf("Error: unsupported location storage.\n");
134                 return -ENODEV;
135         }
136
137         if (res)
138                 printf("Error: could not access storage.\n");
139
140         return res;
141 }
142
143 #ifdef CONFIG_USB_STORAGE
144 static int splash_init_usb(void)
145 {
146         int err;
147
148         err = usb_init();
149         if (err)
150                 return err;
151
152 #ifndef CONFIG_DM_USB
153         err = usb_stor_scan(1) < 0 ? -ENODEV : 0;
154 #endif
155
156         return err;
157 }
158 #else
159 static inline int splash_init_usb(void)
160 {
161         printf("Cannot load splash image: no USB support\n");
162         return -ENOSYS;
163 }
164 #endif
165
166 #ifdef CONFIG_SATA
167 static int splash_init_sata(void)
168 {
169         return sata_probe(0);
170 }
171 #else
172 static inline int splash_init_sata(void)
173 {
174         printf("Cannot load splash image: no SATA support\n");
175         return -ENOSYS;
176 }
177 #endif
178
179 #ifdef CONFIG_CMD_UBIFS
180 static int splash_mount_ubifs(struct splash_location *location)
181 {
182         int res;
183         char cmd[32];
184
185         sprintf(cmd, "ubi part %s", location->mtdpart);
186         res = run_command(cmd, 0);
187         if (res)
188                 return res;
189
190         sprintf(cmd, "ubifsmount %s", location->ubivol);
191         res = run_command(cmd, 0);
192
193         return res;
194 }
195
196 static inline int splash_umount_ubifs(void)
197 {
198         return run_command("ubifsumount", 0);
199 }
200 #else
201 static inline int splash_mount_ubifs(struct splash_location *location)
202 {
203         printf("Cannot load splash image: no UBIFS support\n");
204         return -ENOSYS;
205 }
206
207 static inline int splash_umount_ubifs(void)
208 {
209         printf("Cannot unmount UBIFS: no UBIFS support\n");
210         return -ENOSYS;
211 }
212 #endif
213
214 #define SPLASH_SOURCE_DEFAULT_FILE_NAME         "splash.bmp"
215
216 static int splash_load_fs(struct splash_location *location, u32 bmp_load_addr)
217 {
218         int res = 0;
219         loff_t bmp_size;
220         loff_t actread;
221         char *splash_file;
222
223         splash_file = env_get("splashfile");
224         if (!splash_file)
225                 splash_file = SPLASH_SOURCE_DEFAULT_FILE_NAME;
226
227         if (location->storage == SPLASH_STORAGE_USB)
228                 res = splash_init_usb();
229
230         if (location->storage == SPLASH_STORAGE_SATA)
231                 res = splash_init_sata();
232
233         if (location->ubivol != NULL)
234                 res = splash_mount_ubifs(location);
235
236         if (res)
237                 return res;
238
239         res = splash_select_fs_dev(location);
240         if (res)
241                 goto out;
242
243         res = fs_size(splash_file, &bmp_size);
244         if (res) {
245                 printf("Error (%d): cannot determine file size\n", res);
246                 goto out;
247         }
248
249         if (bmp_load_addr + bmp_size >= gd->start_addr_sp) {
250                 printf("Error: splashimage address too high. Data overwrites U-Boot and/or placed beyond DRAM boundaries.\n");
251                 res = -EFAULT;
252                 goto out;
253         }
254
255         splash_select_fs_dev(location);
256         res = fs_read(splash_file, bmp_load_addr, 0, 0, &actread);
257
258 out:
259         if (location->ubivol != NULL)
260                 splash_umount_ubifs();
261
262         return res;
263 }
264
265 /**
266  * select_splash_location - return the splash location based on board support
267  *                          and env variable "splashsource".
268  *
269  * @locations:          An array of supported splash locations.
270  * @size:               Size of splash_locations array.
271  *
272  * @return: If a null set of splash locations is given, or
273  *          splashsource env variable is set to unsupported value
274  *                      return NULL.
275  *          If splashsource env variable is not defined
276  *                      return the first entry in splash_locations as default.
277  *          If splashsource env variable contains a supported value
278  *                      return the location selected by splashsource.
279  */
280 static struct splash_location *select_splash_location(
281                             struct splash_location *locations, uint size)
282 {
283         int i;
284         char *env_splashsource;
285
286         if (!locations || size == 0)
287                 return NULL;
288
289         env_splashsource = env_get("splashsource");
290         if (env_splashsource == NULL)
291                 return &locations[0];
292
293         for (i = 0; i < size; i++) {
294                 if (!strcmp(locations[i].name, env_splashsource))
295                         return &locations[i];
296         }
297
298         printf("splashsource env variable set to unsupported value\n");
299         return NULL;
300 }
301
302 #ifdef CONFIG_FIT
303 static int splash_load_fit(struct splash_location *location, u32 bmp_load_addr)
304 {
305         int res;
306         int node_offset;
307         int splash_offset;
308         int splash_size;
309         struct image_header *img_header;
310         const u32 *fit_header;
311         u32 fit_size;
312         const size_t header_size = sizeof(struct image_header);
313
314         /* Read in image header */
315         res = splash_storage_read_raw(location, bmp_load_addr, header_size);
316         if (res < 0)
317                 return res;
318
319         img_header = (struct image_header *)bmp_load_addr;
320         if (image_get_magic(img_header) != FDT_MAGIC) {
321                 printf("Could not find FDT magic\n");
322                 return -EINVAL;
323         }
324
325         fit_size = fdt_totalsize(img_header);
326
327         /* Read in entire FIT */
328         fit_header = (const u32 *)(bmp_load_addr + header_size);
329         res = splash_storage_read_raw(location, (u32)fit_header, fit_size);
330         if (res < 0)
331                 return res;
332
333         res = fit_check_format(fit_header);
334         if (!res) {
335                 debug("Could not find valid FIT image\n");
336                 return -EINVAL;
337         }
338
339         node_offset = fit_image_get_node(fit_header, location->name);
340         if (node_offset < 0) {
341                 debug("Could not find splash image '%s' in FIT\n",
342                       location->name);
343                 return -ENOENT;
344         }
345
346         res = fit_image_get_data_offset(fit_header, node_offset,
347                                         &splash_offset);
348         if (res < 0) {
349                 printf("Failed to load splash image (err=%d)\n", res);
350                 return res;
351         }
352
353         res = fit_image_get_data_size(fit_header, node_offset, &splash_size);
354         if (res < 0) {
355                 printf("Failed to load splash image (err=%d)\n", res);
356                 return res;
357         }
358
359         /* Align data offset to 4-byte boundrary */
360         fit_size = fdt_totalsize(fit_header);
361         fit_size = (fit_size + 3) & ~3;
362
363         /* Read in the splash data */
364         location->offset = (location->offset + fit_size + splash_offset);
365         res = splash_storage_read_raw(location, bmp_load_addr , splash_size);
366         if (res < 0)
367                 return res;
368
369         return 0;
370 }
371 #endif /* CONFIG_FIT */
372
373 /**
374  * splash_source_load - load splash image from a supported location.
375  *
376  * Select a splash image location based on the value of splashsource environment
377  * variable and the board supported splash source locations, and load a
378  * splashimage to the address pointed to by splashimage environment variable.
379  *
380  * @locations:          An array of supported splash locations.
381  * @size:               Size of splash_locations array.
382  *
383  * @return: 0 on success, negative value on failure.
384  */
385 int splash_source_load(struct splash_location *locations, uint size)
386 {
387         struct splash_location *splash_location;
388         char *env_splashimage_value;
389         u32 bmp_load_addr;
390
391         env_splashimage_value = env_get("splashimage");
392         if (env_splashimage_value == NULL)
393                 return -ENOENT;
394
395         bmp_load_addr = simple_strtoul(env_splashimage_value, 0, 16);
396         if (bmp_load_addr == 0) {
397                 printf("Error: bad splashimage address specified\n");
398                 return -EFAULT;
399         }
400
401         splash_location = select_splash_location(locations, size);
402         if (!splash_location)
403                 return -EINVAL;
404
405         if (splash_location->flags == SPLASH_STORAGE_RAW)
406                 return splash_load_raw(splash_location, bmp_load_addr);
407         else if (splash_location->flags == SPLASH_STORAGE_FS)
408                 return splash_load_fs(splash_location, bmp_load_addr);
409 #ifdef CONFIG_FIT
410         else if (splash_location->flags == SPLASH_STORAGE_FIT)
411                 return splash_load_fit(splash_location, bmp_load_addr);
412 #endif
413         return -EINVAL;
414 }