1 /*
2 *
3 * Description: Defines the platform resources for Gaia-based settops.
4 *
5 * Copyright (C) 2005-2009 Scientific-Atlanta, Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * NOTE: The bootloader allocates persistent memory at an address which is
22 * 16 MiB below the end of the highest address in KSEG0. All fixed
23 * address memory reservations must avoid this region.
24 */
25
26 #include <linux/device.h>
27 #include <linux/kernel.h>
28 #include <linux/init.h>
29 #include <linux/resource.h>
30 #include <linux/serial_reg.h>
31 #include <linux/io.h>
32 #include <linux/bootmem.h>
33 #include <linux/mm.h>
34 #include <linux/platform_device.h>
35 #include <linux/module.h>
36 #include <asm/page.h>
37 #include <linux/swap.h>
38 #include <linux/highmem.h>
39 #include <linux/dma-mapping.h>
40
41 #include <asm/mach-powertv/asic.h>
42 #include <asm/mach-powertv/asic_regs.h>
43 #include <asm/mach-powertv/interrupts.h>
44
45 #ifdef CONFIG_BOOTLOADER_DRIVER
46 #include <asm/mach-powertv/kbldr.h>
47 #endif
48 #include <asm/bootinfo.h>
49
50 #define BOOTLDRFAMILY(byte1, byte0) (((byte1) << 8) | (byte0))
51
52 /*
53 * Forward Prototypes
54 */
55 static void pmem_setup_resource(void);
56
57 /*
58 * Global Variables
59 */
60 enum asic_type asic;
61
62 unsigned int platform_features;
63 unsigned int platform_family;
64 struct register_map _asic_register_map;
65 EXPORT_SYMBOL(_asic_register_map); /* Exported for testing */
66 unsigned long asic_phy_base;
67 unsigned long asic_base;
68 EXPORT_SYMBOL(asic_base); /* Exported for testing */
69 struct resource *gp_resources;
70
71 /*
72 * Don't recommend to use it directly, it is usually used by kernel internally.
73 * Portable code should be using interfaces such as ioremp, dma_map_single, etc.
74 */
75 unsigned long phys_to_dma_offset;
76 EXPORT_SYMBOL(phys_to_dma_offset);
77
78 /*
79 *
80 * IO Resource Definition
81 *
82 */
83
84 struct resource asic_resource = {
85 .name = "ASIC Resource",
86 .start = 0,
87 .end = ASIC_IO_SIZE,
88 .flags = IORESOURCE_MEM,
89 };
90
91 /*
92 * Allow override of bootloader-specified model
93 * Returns zero on success, a negative errno value on failure. This parameter
94 * allows overriding of the bootloader-specified model.
95 */
96 static char __initdata cmdline[COMMAND_LINE_SIZE];
97
98 #define FORCEFAMILY_PARAM "forcefamily"
99
100 /*
101 * check_forcefamily - check for, and parse, forcefamily command line parameter
102 * @forced_family: Pointer to two-character array in which to store the
103 * value of the forcedfamily parameter, if any.
104 */
check_forcefamily(unsigned char forced_family[2])105 static __init int check_forcefamily(unsigned char forced_family[2])
106 {
107 const char *p;
108
109 forced_family[0] = '\0';
110 forced_family[1] = '\0';
111
112 /* Check the command line for a forcefamily directive */
113 strncpy(cmdline, arcs_cmdline, COMMAND_LINE_SIZE - 1);
114 p = strstr(cmdline, FORCEFAMILY_PARAM);
115 if (p && (p != cmdline) && (*(p - 1) != ' '))
116 p = strstr(p, " " FORCEFAMILY_PARAM "=");
117
118 if (p) {
119 p += strlen(FORCEFAMILY_PARAM "=");
120
121 if (*p == '\0' || *(p + 1) == '\0' ||
122 (*(p + 2) != '\0' && *(p + 2) != ' '))
123 pr_err(FORCEFAMILY_PARAM " must be exactly two "
124 "characters long, ignoring value\n");
125
126 else {
127 forced_family[0] = *p;
128 forced_family[1] = *(p + 1);
129 }
130 }
131
132 return 0;
133 }
134
135 /*
136 * platform_set_family - determine major platform family type.
137 *
138 * Returns family type; -1 if none
139 * Returns the family type; -1 if none
140 *
141 */
platform_set_family(void)142 static __init noinline void platform_set_family(void)
143 {
144 unsigned char forced_family[2];
145 unsigned short bootldr_family;
146
147 if (check_forcefamily(forced_family) == 0)
148 bootldr_family = BOOTLDRFAMILY(forced_family[0],
149 forced_family[1]);
150 else {
151
152 #ifdef CONFIG_BOOTLOADER_DRIVER
153 bootldr_family = (unsigned short) kbldr_GetSWFamily();
154 #else
155 #if defined(CONFIG_BOOTLOADER_FAMILY)
156 bootldr_family = (unsigned short) BOOTLDRFAMILY(
157 CONFIG_BOOTLOADER_FAMILY[0],
158 CONFIG_BOOTLOADER_FAMILY[1]);
159 #else
160 #error "Unknown Bootloader Family"
161 #endif
162 #endif
163 }
164
165 pr_info("Bootloader Family = 0x%04X\n", bootldr_family);
166
167 switch (bootldr_family) {
168 case BOOTLDRFAMILY('R', '1'):
169 platform_family = FAMILY_1500;
170 break;
171 case BOOTLDRFAMILY('4', '4'):
172 platform_family = FAMILY_4500;
173 break;
174 case BOOTLDRFAMILY('4', '6'):
175 platform_family = FAMILY_4600;
176 break;
177 case BOOTLDRFAMILY('A', '1'):
178 platform_family = FAMILY_4600VZA;
179 break;
180 case BOOTLDRFAMILY('8', '5'):
181 platform_family = FAMILY_8500;
182 break;
183 case BOOTLDRFAMILY('R', '2'):
184 platform_family = FAMILY_8500RNG;
185 break;
186 case BOOTLDRFAMILY('8', '6'):
187 platform_family = FAMILY_8600;
188 break;
189 case BOOTLDRFAMILY('B', '1'):
190 platform_family = FAMILY_8600VZB;
191 break;
192 case BOOTLDRFAMILY('E', '1'):
193 platform_family = FAMILY_1500VZE;
194 break;
195 case BOOTLDRFAMILY('F', '1'):
196 platform_family = FAMILY_1500VZF;
197 break;
198 case BOOTLDRFAMILY('8', '7'):
199 platform_family = FAMILY_8700;
200 break;
201 default:
202 platform_family = -1;
203 }
204 }
205
platform_get_family(void)206 unsigned int platform_get_family(void)
207 {
208 return platform_family;
209 }
210 EXPORT_SYMBOL(platform_get_family);
211
212 /*
213 * platform_get_asic - determine the ASIC type.
214 *
215 * Returns the ASIC type, or ASIC_UNKNOWN if unknown
216 *
217 */
platform_get_asic(void)218 enum asic_type platform_get_asic(void)
219 {
220 return asic;
221 }
222 EXPORT_SYMBOL(platform_get_asic);
223
224 /*
225 * set_register_map - set ASIC register configuration
226 * @phys_base: Physical address of the base of the ASIC registers
227 * @map: Description of key ASIC registers
228 */
set_register_map(unsigned long phys_base,const struct register_map * map)229 static void __init set_register_map(unsigned long phys_base,
230 const struct register_map *map)
231 {
232 asic_phy_base = phys_base;
233 _asic_register_map = *map;
234 register_map_virtualize(&_asic_register_map);
235 asic_base = (unsigned long)ioremap_nocache(phys_base, ASIC_IO_SIZE);
236 }
237
238 /**
239 * configure_platform - configuration based on platform type.
240 */
configure_platform(void)241 void __init configure_platform(void)
242 {
243 platform_set_family();
244
245 switch (platform_family) {
246 case FAMILY_1500:
247 case FAMILY_1500VZE:
248 case FAMILY_1500VZF:
249 platform_features = FFS_CAPABLE;
250 asic = ASIC_CALLIOPE;
251 set_register_map(CALLIOPE_IO_BASE, &calliope_register_map);
252
253 if (platform_family == FAMILY_1500VZE) {
254 gp_resources = non_dvr_vze_calliope_resources;
255 pr_info("Platform: 1500/Vz Class E - "
256 "CALLIOPE, NON_DVR_CAPABLE\n");
257 } else if (platform_family == FAMILY_1500VZF) {
258 gp_resources = non_dvr_vzf_calliope_resources;
259 pr_info("Platform: 1500/Vz Class F - "
260 "CALLIOPE, NON_DVR_CAPABLE\n");
261 } else {
262 gp_resources = non_dvr_calliope_resources;
263 pr_info("Platform: 1500/RNG100 - CALLIOPE, "
264 "NON_DVR_CAPABLE\n");
265 }
266 break;
267
268 case FAMILY_4500:
269 platform_features = FFS_CAPABLE | PCIE_CAPABLE |
270 DISPLAY_CAPABLE;
271 asic = ASIC_ZEUS;
272 set_register_map(ZEUS_IO_BASE, &zeus_register_map);
273 gp_resources = non_dvr_zeus_resources;
274
275 pr_info("Platform: 4500 - ZEUS, NON_DVR_CAPABLE\n");
276 break;
277
278 case FAMILY_4600:
279 {
280 unsigned int chipversion = 0;
281
282 /* The settop has PCIE but it isn't used, so don't advertise
283 * it*/
284 platform_features = FFS_CAPABLE | DISPLAY_CAPABLE;
285
286 /* Cronus and Cronus Lite have the same register map */
287 set_register_map(CRONUS_IO_BASE, &cronus_register_map);
288
289 /* ASIC version will determine if this is a real CronusLite or
290 * Castrati(Cronus) */
291 chipversion = asic_read(chipver3) << 24;
292 chipversion |= asic_read(chipver2) << 16;
293 chipversion |= asic_read(chipver1) << 8;
294 chipversion |= asic_read(chipver0);
295
296 if ((chipversion == CRONUS_10) || (chipversion == CRONUS_11))
297 asic = ASIC_CRONUS;
298 else
299 asic = ASIC_CRONUSLITE;
300
301 gp_resources = non_dvr_cronuslite_resources;
302 pr_info("Platform: 4600 - %s, NON_DVR_CAPABLE, "
303 "chipversion=0x%08X\n",
304 (asic == ASIC_CRONUS) ? "CRONUS" : "CRONUS LITE",
305 chipversion);
306 break;
307 }
308 case FAMILY_4600VZA:
309 platform_features = FFS_CAPABLE | DISPLAY_CAPABLE;
310 asic = ASIC_CRONUS;
311 set_register_map(CRONUS_IO_BASE, &cronus_register_map);
312 gp_resources = non_dvr_cronus_resources;
313
314 pr_info("Platform: Vz Class A - CRONUS, NON_DVR_CAPABLE\n");
315 break;
316
317 case FAMILY_8500:
318 case FAMILY_8500RNG:
319 platform_features = DVR_CAPABLE | PCIE_CAPABLE |
320 DISPLAY_CAPABLE;
321 asic = ASIC_ZEUS;
322 set_register_map(ZEUS_IO_BASE, &zeus_register_map);
323 gp_resources = dvr_zeus_resources;
324
325 pr_info("Platform: 8500/RNG200 - ZEUS, DVR_CAPABLE\n");
326 break;
327
328 case FAMILY_8600:
329 case FAMILY_8600VZB:
330 platform_features = DVR_CAPABLE | PCIE_CAPABLE |
331 DISPLAY_CAPABLE;
332 asic = ASIC_CRONUS;
333 set_register_map(CRONUS_IO_BASE, &cronus_register_map);
334 gp_resources = dvr_cronus_resources;
335
336 pr_info("Platform: 8600/Vz Class B - CRONUS, "
337 "DVR_CAPABLE\n");
338 break;
339
340 case FAMILY_8700:
341 platform_features = FFS_CAPABLE | PCIE_CAPABLE;
342 asic = ASIC_GAIA;
343 set_register_map(GAIA_IO_BASE, &gaia_register_map);
344 gp_resources = dvr_gaia_resources;
345
346 pr_info("Platform: 8700 - GAIA, DVR_CAPABLE\n");
347 break;
348
349 default:
350 pr_crit("Platform: UNKNOWN PLATFORM\n");
351 break;
352 }
353
354 switch (asic) {
355 case ASIC_ZEUS:
356 phys_to_dma_offset = 0x30000000;
357 break;
358 case ASIC_CALLIOPE:
359 phys_to_dma_offset = 0x10000000;
360 break;
361 case ASIC_CRONUSLITE:
362 /* Fall through */
363 case ASIC_CRONUS:
364 /*
365 * TODO: We suppose 0x10000000 aliases into 0x20000000-
366 * 0x2XXXXXXX. If 0x10000000 aliases into 0x60000000-
367 * 0x6XXXXXXX, the offset should be 0x50000000, not 0x10000000.
368 */
369 phys_to_dma_offset = 0x10000000;
370 break;
371 default:
372 phys_to_dma_offset = 0x00000000;
373 break;
374 }
375 }
376
377 /*
378 * RESOURCE ALLOCATION
379 *
380 */
381 /*
382 * Allocates/reserves the Platform memory resources early in the boot process.
383 * This ignores any resources that are designated IORESOURCE_IO
384 */
platform_alloc_bootmem(void)385 void __init platform_alloc_bootmem(void)
386 {
387 int i;
388 int total = 0;
389
390 /* Get persistent memory data from command line before allocating
391 * resources. This need to happen before normal command line parsing
392 * has been done */
393 pmem_setup_resource();
394
395 /* Loop through looking for resources that want a particular address */
396 for (i = 0; gp_resources[i].flags != 0; i++) {
397 int size = resource_size(&gp_resources[i]);
398 if ((gp_resources[i].start != 0) &&
399 ((gp_resources[i].flags & IORESOURCE_MEM) != 0)) {
400 reserve_bootmem(dma_to_phys(gp_resources[i].start),
401 size, 0);
402 total += resource_size(&gp_resources[i]);
403 pr_info("reserve resource %s at %08x (%u bytes)\n",
404 gp_resources[i].name, gp_resources[i].start,
405 resource_size(&gp_resources[i]));
406 }
407 }
408
409 /* Loop through assigning addresses for those that are left */
410 for (i = 0; gp_resources[i].flags != 0; i++) {
411 int size = resource_size(&gp_resources[i]);
412 if ((gp_resources[i].start == 0) &&
413 ((gp_resources[i].flags & IORESOURCE_MEM) != 0)) {
414 void *mem = alloc_bootmem_pages(size);
415
416 if (mem == NULL)
417 pr_err("Unable to allocate bootmem pages "
418 "for %s\n", gp_resources[i].name);
419
420 else {
421 gp_resources[i].start =
422 phys_to_dma(virt_to_phys(mem));
423 gp_resources[i].end =
424 gp_resources[i].start + size - 1;
425 total += size;
426 pr_info("allocate resource %s at %08x "
427 "(%u bytes)\n",
428 gp_resources[i].name,
429 gp_resources[i].start, size);
430 }
431 }
432 }
433
434 pr_info("Total Platform driver memory allocation: 0x%08x\n", total);
435
436 /* indicate resources that are platform I/O related */
437 for (i = 0; gp_resources[i].flags != 0; i++) {
438 if ((gp_resources[i].start != 0) &&
439 ((gp_resources[i].flags & IORESOURCE_IO) != 0)) {
440 pr_info("reserved platform resource %s at %08x\n",
441 gp_resources[i].name, gp_resources[i].start);
442 }
443 }
444 }
445
446 /*
447 *
448 * PERSISTENT MEMORY (PMEM) CONFIGURATION
449 *
450 */
451 static unsigned long pmemaddr __initdata;
452
early_param_pmemaddr(char * p)453 static int __init early_param_pmemaddr(char *p)
454 {
455 pmemaddr = (unsigned long)simple_strtoul(p, NULL, 0);
456 return 0;
457 }
458 early_param("pmemaddr", early_param_pmemaddr);
459
460 static long pmemlen __initdata;
461
early_param_pmemlen(char * p)462 static int __init early_param_pmemlen(char *p)
463 {
464 /* TODO: we can use this code when and if the bootloader ever changes this */
465 #if 0
466 pmemlen = (unsigned long)simple_strtoul(p, NULL, 0);
467 #else
468 pmemlen = 0x20000;
469 #endif
470 return 0;
471 }
472 early_param("pmemlen", early_param_pmemlen);
473
474 /*
475 * Set up persistent memory. If we were given values, we patch the array of
476 * resources. Otherwise, persistent memory may be allocated anywhere at all.
477 */
pmem_setup_resource(void)478 static void __init pmem_setup_resource(void)
479 {
480 struct resource *resource;
481 resource = asic_resource_get("DiagPersistentMemory");
482
483 if (resource && pmemaddr && pmemlen) {
484 /* The address provided by bootloader is in kseg0. Convert to
485 * a bus address. */
486 resource->start = phys_to_dma(pmemaddr - 0x80000000);
487 resource->end = resource->start + pmemlen - 1;
488
489 pr_info("persistent memory: start=0x%x end=0x%x\n",
490 resource->start, resource->end);
491 }
492 }
493
494 /*
495 *
496 * RESOURCE ACCESS FUNCTIONS
497 *
498 */
499
500 /**
501 * asic_resource_get - retrieves parameters for a platform resource.
502 * @name: string to match resource
503 *
504 * Returns a pointer to a struct resource corresponding to the given name.
505 *
506 * CANNOT BE NAMED platform_resource_get, which would be the obvious choice,
507 * as this function name is already declared
508 */
asic_resource_get(const char * name)509 struct resource *asic_resource_get(const char *name)
510 {
511 int i;
512
513 for (i = 0; gp_resources[i].flags != 0; i++) {
514 if (strcmp(gp_resources[i].name, name) == 0)
515 return &gp_resources[i];
516 }
517
518 return NULL;
519 }
520 EXPORT_SYMBOL(asic_resource_get);
521
522 /**
523 * platform_release_memory - release pre-allocated memory
524 * @ptr: pointer to memory to release
525 * @size: size of resource
526 *
527 * This must only be called for memory allocated or reserved via the boot
528 * memory allocator.
529 */
platform_release_memory(void * ptr,int size)530 void platform_release_memory(void *ptr, int size)
531 {
532 unsigned long addr;
533 unsigned long end;
534
535 addr = ((unsigned long)ptr + (PAGE_SIZE - 1)) & PAGE_MASK;
536 end = ((unsigned long)ptr + size) & PAGE_MASK;
537
538 for (; addr < end; addr += PAGE_SIZE) {
539 ClearPageReserved(virt_to_page(__va(addr)));
540 init_page_count(virt_to_page(__va(addr)));
541 free_page((unsigned long)__va(addr));
542 }
543 }
544 EXPORT_SYMBOL(platform_release_memory);
545
546 /*
547 *
548 * FEATURE AVAILABILITY FUNCTIONS
549 *
550 */
platform_supports_dvr(void)551 int platform_supports_dvr(void)
552 {
553 return (platform_features & DVR_CAPABLE) != 0;
554 }
555
platform_supports_ffs(void)556 int platform_supports_ffs(void)
557 {
558 return (platform_features & FFS_CAPABLE) != 0;
559 }
560
platform_supports_pcie(void)561 int platform_supports_pcie(void)
562 {
563 return (platform_features & PCIE_CAPABLE) != 0;
564 }
565
platform_supports_display(void)566 int platform_supports_display(void)
567 {
568 return (platform_features & DISPLAY_CAPABLE) != 0;
569 }
570