diff options
Diffstat (limited to 'arch/powerpc/sysdev/qe_lib')
-rw-r--r-- | arch/powerpc/sysdev/qe_lib/Kconfig | 2 | ||||
-rw-r--r-- | arch/powerpc/sysdev/qe_lib/qe.c | 247 | ||||
-rw-r--r-- | arch/powerpc/sysdev/qe_lib/ucc_slow.c | 10 |
3 files changed, 257 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/Kconfig b/arch/powerpc/sysdev/qe_lib/Kconfig index f611d344a126..adc66212a419 100644 --- a/arch/powerpc/sysdev/qe_lib/Kconfig +++ b/arch/powerpc/sysdev/qe_lib/Kconfig | |||
@@ -4,7 +4,7 @@ | |||
4 | 4 | ||
5 | config UCC_SLOW | 5 | config UCC_SLOW |
6 | bool | 6 | bool |
7 | default n | 7 | default y if SERIAL_QE |
8 | help | 8 | help |
9 | This option provides qe_lib support to UCC slow | 9 | This option provides qe_lib support to UCC slow |
10 | protocols: UART, BISYNC, QMC | 10 | protocols: UART, BISYNC, QMC |
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c index 21e01061aca9..3925eae9b0f5 100644 --- a/arch/powerpc/sysdev/qe_lib/qe.c +++ b/arch/powerpc/sysdev/qe_lib/qe.c | |||
@@ -25,6 +25,7 @@ | |||
25 | #include <linux/module.h> | 25 | #include <linux/module.h> |
26 | #include <linux/delay.h> | 26 | #include <linux/delay.h> |
27 | #include <linux/ioport.h> | 27 | #include <linux/ioport.h> |
28 | #include <linux/crc32.h> | ||
28 | #include <asm/irq.h> | 29 | #include <asm/irq.h> |
29 | #include <asm/page.h> | 30 | #include <asm/page.h> |
30 | #include <asm/pgtable.h> | 31 | #include <asm/pgtable.h> |
@@ -394,3 +395,249 @@ void *qe_muram_addr(unsigned long offset) | |||
394 | return (void *)&qe_immr->muram[offset]; | 395 | return (void *)&qe_immr->muram[offset]; |
395 | } | 396 | } |
396 | EXPORT_SYMBOL(qe_muram_addr); | 397 | EXPORT_SYMBOL(qe_muram_addr); |
398 | |||
399 | /* The maximum number of RISCs we support */ | ||
400 | #define MAX_QE_RISC 2 | ||
401 | |||
402 | /* Firmware information stored here for qe_get_firmware_info() */ | ||
403 | static struct qe_firmware_info qe_firmware_info; | ||
404 | |||
405 | /* | ||
406 | * Set to 1 if QE firmware has been uploaded, and therefore | ||
407 | * qe_firmware_info contains valid data. | ||
408 | */ | ||
409 | static int qe_firmware_uploaded; | ||
410 | |||
411 | /* | ||
412 | * Upload a QE microcode | ||
413 | * | ||
414 | * This function is a worker function for qe_upload_firmware(). It does | ||
415 | * the actual uploading of the microcode. | ||
416 | */ | ||
417 | static void qe_upload_microcode(const void *base, | ||
418 | const struct qe_microcode *ucode) | ||
419 | { | ||
420 | const __be32 *code = base + be32_to_cpu(ucode->code_offset); | ||
421 | unsigned int i; | ||
422 | |||
423 | if (ucode->major || ucode->minor || ucode->revision) | ||
424 | printk(KERN_INFO "qe-firmware: " | ||
425 | "uploading microcode '%s' version %u.%u.%u\n", | ||
426 | ucode->id, ucode->major, ucode->minor, ucode->revision); | ||
427 | else | ||
428 | printk(KERN_INFO "qe-firmware: " | ||
429 | "uploading microcode '%s'\n", ucode->id); | ||
430 | |||
431 | /* Use auto-increment */ | ||
432 | out_be32(&qe_immr->iram.iadd, be32_to_cpu(ucode->iram_offset) | | ||
433 | QE_IRAM_IADD_AIE | QE_IRAM_IADD_BADDR); | ||
434 | |||
435 | for (i = 0; i < be32_to_cpu(ucode->count); i++) | ||
436 | out_be32(&qe_immr->iram.idata, be32_to_cpu(code[i])); | ||
437 | } | ||
438 | |||
439 | /* | ||
440 | * Upload a microcode to the I-RAM at a specific address. | ||
441 | * | ||
442 | * See Documentation/powerpc/qe-firmware.txt for information on QE microcode | ||
443 | * uploading. | ||
444 | * | ||
445 | * Currently, only version 1 is supported, so the 'version' field must be | ||
446 | * set to 1. | ||
447 | * | ||
448 | * The SOC model and revision are not validated, they are only displayed for | ||
449 | * informational purposes. | ||
450 | * | ||
451 | * 'calc_size' is the calculated size, in bytes, of the firmware structure and | ||
452 | * all of the microcode structures, minus the CRC. | ||
453 | * | ||
454 | * 'length' is the size that the structure says it is, including the CRC. | ||
455 | */ | ||
456 | int qe_upload_firmware(const struct qe_firmware *firmware) | ||
457 | { | ||
458 | unsigned int i; | ||
459 | unsigned int j; | ||
460 | u32 crc; | ||
461 | size_t calc_size = sizeof(struct qe_firmware); | ||
462 | size_t length; | ||
463 | const struct qe_header *hdr; | ||
464 | |||
465 | if (!firmware) { | ||
466 | printk(KERN_ERR "qe-firmware: invalid pointer\n"); | ||
467 | return -EINVAL; | ||
468 | } | ||
469 | |||
470 | hdr = &firmware->header; | ||
471 | length = be32_to_cpu(hdr->length); | ||
472 | |||
473 | /* Check the magic */ | ||
474 | if ((hdr->magic[0] != 'Q') || (hdr->magic[1] != 'E') || | ||
475 | (hdr->magic[2] != 'F')) { | ||
476 | printk(KERN_ERR "qe-firmware: not a microcode\n"); | ||
477 | return -EPERM; | ||
478 | } | ||
479 | |||
480 | /* Check the version */ | ||
481 | if (hdr->version != 1) { | ||
482 | printk(KERN_ERR "qe-firmware: unsupported version\n"); | ||
483 | return -EPERM; | ||
484 | } | ||
485 | |||
486 | /* Validate some of the fields */ | ||
487 | if ((firmware->count < 1) || (firmware->count >= MAX_QE_RISC)) { | ||
488 | printk(KERN_ERR "qe-firmware: invalid data\n"); | ||
489 | return -EINVAL; | ||
490 | } | ||
491 | |||
492 | /* Validate the length and check if there's a CRC */ | ||
493 | calc_size += (firmware->count - 1) * sizeof(struct qe_microcode); | ||
494 | |||
495 | for (i = 0; i < firmware->count; i++) | ||
496 | /* | ||
497 | * For situations where the second RISC uses the same microcode | ||
498 | * as the first, the 'code_offset' and 'count' fields will be | ||
499 | * zero, so it's okay to add those. | ||
500 | */ | ||
501 | calc_size += sizeof(__be32) * | ||
502 | be32_to_cpu(firmware->microcode[i].count); | ||
503 | |||
504 | /* Validate the length */ | ||
505 | if (length != calc_size + sizeof(__be32)) { | ||
506 | printk(KERN_ERR "qe-firmware: invalid length\n"); | ||
507 | return -EPERM; | ||
508 | } | ||
509 | |||
510 | /* Validate the CRC */ | ||
511 | crc = be32_to_cpu(*(__be32 *)((void *)firmware + calc_size)); | ||
512 | if (crc != crc32(0, firmware, calc_size)) { | ||
513 | printk(KERN_ERR "qe-firmware: firmware CRC is invalid\n"); | ||
514 | return -EIO; | ||
515 | } | ||
516 | |||
517 | /* | ||
518 | * If the microcode calls for it, split the I-RAM. | ||
519 | */ | ||
520 | if (!firmware->split) | ||
521 | setbits16(&qe_immr->cp.cercr, QE_CP_CERCR_CIR); | ||
522 | |||
523 | if (firmware->soc.model) | ||
524 | printk(KERN_INFO | ||
525 | "qe-firmware: firmware '%s' for %u V%u.%u\n", | ||
526 | firmware->id, be16_to_cpu(firmware->soc.model), | ||
527 | firmware->soc.major, firmware->soc.minor); | ||
528 | else | ||
529 | printk(KERN_INFO "qe-firmware: firmware '%s'\n", | ||
530 | firmware->id); | ||
531 | |||
532 | /* | ||
533 | * The QE only supports one microcode per RISC, so clear out all the | ||
534 | * saved microcode information and put in the new. | ||
535 | */ | ||
536 | memset(&qe_firmware_info, 0, sizeof(qe_firmware_info)); | ||
537 | strcpy(qe_firmware_info.id, firmware->id); | ||
538 | qe_firmware_info.extended_modes = firmware->extended_modes; | ||
539 | memcpy(qe_firmware_info.vtraps, firmware->vtraps, | ||
540 | sizeof(firmware->vtraps)); | ||
541 | |||
542 | /* Loop through each microcode. */ | ||
543 | for (i = 0; i < firmware->count; i++) { | ||
544 | const struct qe_microcode *ucode = &firmware->microcode[i]; | ||
545 | |||
546 | /* Upload a microcode if it's present */ | ||
547 | if (ucode->code_offset) | ||
548 | qe_upload_microcode(firmware, ucode); | ||
549 | |||
550 | /* Program the traps for this processor */ | ||
551 | for (j = 0; j < 16; j++) { | ||
552 | u32 trap = be32_to_cpu(ucode->traps[j]); | ||
553 | |||
554 | if (trap) | ||
555 | out_be32(&qe_immr->rsp[i].tibcr[j], trap); | ||
556 | } | ||
557 | |||
558 | /* Enable traps */ | ||
559 | out_be32(&qe_immr->rsp[i].eccr, be32_to_cpu(ucode->eccr)); | ||
560 | } | ||
561 | |||
562 | qe_firmware_uploaded = 1; | ||
563 | |||
564 | return 0; | ||
565 | } | ||
566 | EXPORT_SYMBOL(qe_upload_firmware); | ||
567 | |||
568 | /* | ||
569 | * Get info on the currently-loaded firmware | ||
570 | * | ||
571 | * This function also checks the device tree to see if the boot loader has | ||
572 | * uploaded a firmware already. | ||
573 | */ | ||
574 | struct qe_firmware_info *qe_get_firmware_info(void) | ||
575 | { | ||
576 | static int initialized; | ||
577 | struct property *prop; | ||
578 | struct device_node *qe; | ||
579 | struct device_node *fw = NULL; | ||
580 | const char *sprop; | ||
581 | unsigned int i; | ||
582 | |||
583 | /* | ||
584 | * If we haven't checked yet, and a driver hasn't uploaded a firmware | ||
585 | * yet, then check the device tree for information. | ||
586 | */ | ||
587 | if (initialized || qe_firmware_uploaded) | ||
588 | return NULL; | ||
589 | |||
590 | initialized = 1; | ||
591 | |||
592 | /* | ||
593 | * Newer device trees have an "fsl,qe" compatible property for the QE | ||
594 | * node, but we still need to support older device trees. | ||
595 | */ | ||
596 | qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); | ||
597 | if (!qe) { | ||
598 | qe = of_find_node_by_type(NULL, "qe"); | ||
599 | if (!qe) | ||
600 | return NULL; | ||
601 | } | ||
602 | |||
603 | /* Find the 'firmware' child node */ | ||
604 | for_each_child_of_node(qe, fw) { | ||
605 | if (strcmp(fw->name, "firmware") == 0) | ||
606 | break; | ||
607 | } | ||
608 | |||
609 | of_node_put(qe); | ||
610 | |||
611 | /* Did we find the 'firmware' node? */ | ||
612 | if (!fw) | ||
613 | return NULL; | ||
614 | |||
615 | qe_firmware_uploaded = 1; | ||
616 | |||
617 | /* Copy the data into qe_firmware_info*/ | ||
618 | sprop = of_get_property(fw, "id", NULL); | ||
619 | if (sprop) | ||
620 | strncpy(qe_firmware_info.id, sprop, | ||
621 | sizeof(qe_firmware_info.id) - 1); | ||
622 | |||
623 | prop = of_find_property(fw, "extended-modes", NULL); | ||
624 | if (prop && (prop->length == sizeof(u64))) { | ||
625 | const u64 *iprop = prop->value; | ||
626 | |||
627 | qe_firmware_info.extended_modes = *iprop; | ||
628 | } | ||
629 | |||
630 | prop = of_find_property(fw, "virtual-traps", NULL); | ||
631 | if (prop && (prop->length == 32)) { | ||
632 | const u32 *iprop = prop->value; | ||
633 | |||
634 | for (i = 0; i < ARRAY_SIZE(qe_firmware_info.vtraps); i++) | ||
635 | qe_firmware_info.vtraps[i] = iprop[i]; | ||
636 | } | ||
637 | |||
638 | of_node_put(fw); | ||
639 | |||
640 | return &qe_firmware_info; | ||
641 | } | ||
642 | EXPORT_SYMBOL(qe_get_firmware_info); | ||
643 | |||
diff --git a/arch/powerpc/sysdev/qe_lib/ucc_slow.c b/arch/powerpc/sysdev/qe_lib/ucc_slow.c index 0174b3aeef8f..b2870b208ddb 100644 --- a/arch/powerpc/sysdev/qe_lib/ucc_slow.c +++ b/arch/powerpc/sysdev/qe_lib/ucc_slow.c | |||
@@ -19,6 +19,7 @@ | |||
19 | #include <linux/stddef.h> | 19 | #include <linux/stddef.h> |
20 | #include <linux/interrupt.h> | 20 | #include <linux/interrupt.h> |
21 | #include <linux/err.h> | 21 | #include <linux/err.h> |
22 | #include <linux/module.h> | ||
22 | 23 | ||
23 | #include <asm/io.h> | 24 | #include <asm/io.h> |
24 | #include <asm/immap_qe.h> | 25 | #include <asm/immap_qe.h> |
@@ -41,6 +42,7 @@ u32 ucc_slow_get_qe_cr_subblock(int uccs_num) | |||
41 | default: return QE_CR_SUBBLOCK_INVALID; | 42 | default: return QE_CR_SUBBLOCK_INVALID; |
42 | } | 43 | } |
43 | } | 44 | } |
45 | EXPORT_SYMBOL(ucc_slow_get_qe_cr_subblock); | ||
44 | 46 | ||
45 | void ucc_slow_poll_transmitter_now(struct ucc_slow_private * uccs) | 47 | void ucc_slow_poll_transmitter_now(struct ucc_slow_private * uccs) |
46 | { | 48 | { |
@@ -56,6 +58,7 @@ void ucc_slow_graceful_stop_tx(struct ucc_slow_private * uccs) | |||
56 | qe_issue_cmd(QE_GRACEFUL_STOP_TX, id, | 58 | qe_issue_cmd(QE_GRACEFUL_STOP_TX, id, |
57 | QE_CR_PROTOCOL_UNSPECIFIED, 0); | 59 | QE_CR_PROTOCOL_UNSPECIFIED, 0); |
58 | } | 60 | } |
61 | EXPORT_SYMBOL(ucc_slow_graceful_stop_tx); | ||
59 | 62 | ||
60 | void ucc_slow_stop_tx(struct ucc_slow_private * uccs) | 63 | void ucc_slow_stop_tx(struct ucc_slow_private * uccs) |
61 | { | 64 | { |
@@ -65,6 +68,7 @@ void ucc_slow_stop_tx(struct ucc_slow_private * uccs) | |||
65 | id = ucc_slow_get_qe_cr_subblock(us_info->ucc_num); | 68 | id = ucc_slow_get_qe_cr_subblock(us_info->ucc_num); |
66 | qe_issue_cmd(QE_STOP_TX, id, QE_CR_PROTOCOL_UNSPECIFIED, 0); | 69 | qe_issue_cmd(QE_STOP_TX, id, QE_CR_PROTOCOL_UNSPECIFIED, 0); |
67 | } | 70 | } |
71 | EXPORT_SYMBOL(ucc_slow_stop_tx); | ||
68 | 72 | ||
69 | void ucc_slow_restart_tx(struct ucc_slow_private * uccs) | 73 | void ucc_slow_restart_tx(struct ucc_slow_private * uccs) |
70 | { | 74 | { |
@@ -74,6 +78,7 @@ void ucc_slow_restart_tx(struct ucc_slow_private * uccs) | |||
74 | id = ucc_slow_get_qe_cr_subblock(us_info->ucc_num); | 78 | id = ucc_slow_get_qe_cr_subblock(us_info->ucc_num); |
75 | qe_issue_cmd(QE_RESTART_TX, id, QE_CR_PROTOCOL_UNSPECIFIED, 0); | 79 | qe_issue_cmd(QE_RESTART_TX, id, QE_CR_PROTOCOL_UNSPECIFIED, 0); |
76 | } | 80 | } |
81 | EXPORT_SYMBOL(ucc_slow_restart_tx); | ||
77 | 82 | ||
78 | void ucc_slow_enable(struct ucc_slow_private * uccs, enum comm_dir mode) | 83 | void ucc_slow_enable(struct ucc_slow_private * uccs, enum comm_dir mode) |
79 | { | 84 | { |
@@ -94,6 +99,7 @@ void ucc_slow_enable(struct ucc_slow_private * uccs, enum comm_dir mode) | |||
94 | } | 99 | } |
95 | out_be32(&us_regs->gumr_l, gumr_l); | 100 | out_be32(&us_regs->gumr_l, gumr_l); |
96 | } | 101 | } |
102 | EXPORT_SYMBOL(ucc_slow_enable); | ||
97 | 103 | ||
98 | void ucc_slow_disable(struct ucc_slow_private * uccs, enum comm_dir mode) | 104 | void ucc_slow_disable(struct ucc_slow_private * uccs, enum comm_dir mode) |
99 | { | 105 | { |
@@ -114,6 +120,7 @@ void ucc_slow_disable(struct ucc_slow_private * uccs, enum comm_dir mode) | |||
114 | } | 120 | } |
115 | out_be32(&us_regs->gumr_l, gumr_l); | 121 | out_be32(&us_regs->gumr_l, gumr_l); |
116 | } | 122 | } |
123 | EXPORT_SYMBOL(ucc_slow_disable); | ||
117 | 124 | ||
118 | /* Initialize the UCC for Slow operations | 125 | /* Initialize the UCC for Slow operations |
119 | * | 126 | * |
@@ -347,6 +354,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc | |||
347 | *uccs_ret = uccs; | 354 | *uccs_ret = uccs; |
348 | return 0; | 355 | return 0; |
349 | } | 356 | } |
357 | EXPORT_SYMBOL(ucc_slow_init); | ||
350 | 358 | ||
351 | void ucc_slow_free(struct ucc_slow_private * uccs) | 359 | void ucc_slow_free(struct ucc_slow_private * uccs) |
352 | { | 360 | { |
@@ -366,5 +374,5 @@ void ucc_slow_free(struct ucc_slow_private * uccs) | |||
366 | 374 | ||
367 | kfree(uccs); | 375 | kfree(uccs); |
368 | } | 376 | } |
369 | 377 | EXPORT_SYMBOL(ucc_slow_free); | |
370 | 378 | ||