| Alessandro Rubini | 77864f2 | 2013-06-18 23:47:13 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 CERN (www.cern.ch) |
| 3 | * Author: Alessandro Rubini <rubini@gnudd.com> |
| 4 | * |
| 5 | * Released according to the GNU GPL, version 2 or any later version. |
| 6 | * |
| 7 | * This work is part of the White Rabbit project, a research effort led |
| 8 | * by CERN, the European Institute for Nuclear Research. |
| 9 | */ |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/moduleparam.h> |
| 12 | #include <linux/device.h> |
| 13 | #include <linux/fmc.h> |
| 14 | #include <linux/fmc-sdb.h> |
| 15 | |
| 16 | static int fmc_must_dump_eeprom; |
| 17 | module_param_named(dump_eeprom, fmc_must_dump_eeprom, int, 0644); |
| 18 | static int fmc_must_dump_sdb; |
| 19 | module_param_named(dump_sdb, fmc_must_dump_sdb, int, 0644); |
| 20 | |
| 21 | #define LINELEN 16 |
| 22 | |
| 23 | /* Dumping 8k takes oh so much: avoid duplicate lines */ |
| 24 | static const uint8_t *dump_line(int addr, const uint8_t *line, |
| 25 | const uint8_t *prev) |
| 26 | { |
| 27 | int i; |
| 28 | |
| 29 | if (!prev || memcmp(line, prev, LINELEN)) { |
| 30 | pr_info("%04x: ", addr); |
| 31 | for (i = 0; i < LINELEN; ) { |
| 32 | printk(KERN_CONT "%02x", line[i]); |
| 33 | i++; |
| 34 | printk(i & 3 ? " " : i & (LINELEN - 1) ? " " : "\n"); |
| 35 | } |
| 36 | return line; |
| 37 | } |
| 38 | /* repeated line */ |
| 39 | if (line == prev + LINELEN) |
| 40 | pr_info("[...]\n"); |
| 41 | return prev; |
| 42 | } |
| 43 | |
| 44 | void fmc_dump_eeprom(const struct fmc_device *fmc) |
| 45 | { |
| 46 | const uint8_t *line, *prev; |
| 47 | int i; |
| 48 | |
| 49 | if (!fmc_must_dump_eeprom) |
| 50 | return; |
| 51 | |
| 52 | pr_info("FMC: %s (%s), slot %i, device %s\n", dev_name(fmc->hwdev), |
| 53 | fmc->carrier_name, fmc->slot_id, dev_name(&fmc->dev)); |
| 54 | pr_info("FMC: dumping eeprom 0x%x (%i) bytes\n", fmc->eeprom_len, |
| 55 | fmc->eeprom_len); |
| 56 | |
| 57 | line = fmc->eeprom; |
| 58 | prev = NULL; |
| 59 | for (i = 0; i < fmc->eeprom_len; i += LINELEN, line += LINELEN) |
| 60 | prev = dump_line(i, line, prev); |
| 61 | } |
| 62 | |
| 63 | void fmc_dump_sdb(const struct fmc_device *fmc) |
| 64 | { |
| 65 | const uint8_t *line, *prev; |
| 66 | int i, len; |
| 67 | |
| 68 | if (!fmc->sdb) |
| 69 | return; |
| 70 | if (!fmc_must_dump_sdb) |
| 71 | return; |
| 72 | |
| 73 | /* If the argument is not-zero, do simple dump (== show) */ |
| 74 | if (fmc_must_dump_sdb > 0) |
| 75 | fmc_show_sdb_tree(fmc); |
| 76 | |
| 77 | if (fmc_must_dump_sdb == 1) |
| 78 | return; |
| 79 | |
| 80 | /* If bigger than 1, dump it seriously, to help debugging */ |
| 81 | |
| 82 | /* |
| 83 | * Here we should really use libsdbfs (which is designed to |
| 84 | * work in kernel space as well) , but it doesn't support |
| 85 | * directories yet, and it requires better intergration (it |
| 86 | * should be used instead of fmc-specific code). |
| 87 | * |
| 88 | * So, lazily, just dump the top-level array |
| 89 | */ |
| 90 | pr_info("FMC: %s (%s), slot %i, device %s\n", dev_name(fmc->hwdev), |
| 91 | fmc->carrier_name, fmc->slot_id, dev_name(&fmc->dev)); |
| 92 | pr_info("FMC: poor dump of sdb first level:\n"); |
| 93 | |
| 94 | len = fmc->sdb->len * sizeof(union sdb_record); |
| 95 | line = (void *)fmc->sdb->record; |
| 96 | prev = NULL; |
| 97 | for (i = 0; i < len; i += LINELEN, line += LINELEN) |
| 98 | prev = dump_line(i, line, prev); |
| 99 | return; |
| 100 | } |