diff options
| -rw-r--r-- | drivers/bcma/scan.c | 230 |
1 files changed, 118 insertions, 112 deletions
diff --git a/drivers/bcma/scan.c b/drivers/bcma/scan.c index 40d7dcce8933..4012d8d93e91 100644 --- a/drivers/bcma/scan.c +++ b/drivers/bcma/scan.c @@ -200,16 +200,124 @@ static s32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 **eromptr, return addrl; } +static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr, + struct bcma_device *core) +{ + s32 tmp; + u8 i, j; + s32 cia, cib; + u8 ports[2], wrappers[2]; + + /* get CIs */ + cia = bcma_erom_get_ci(bus, eromptr); + if (cia < 0) { + bcma_erom_push_ent(eromptr); + if (bcma_erom_is_end(bus, eromptr)) + return -ESPIPE; + return -EILSEQ; + } + cib = bcma_erom_get_ci(bus, eromptr); + if (cib < 0) + return -EILSEQ; + + /* parse CIs */ + core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT; + core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT; + core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT; + ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT; + ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT; + wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT; + wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT; + core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT; + + if (((core->id.manuf == BCMA_MANUF_ARM) && + (core->id.id == 0xFFF)) || + (ports[1] == 0)) { + bcma_erom_skip_component(bus, eromptr); + return -ENXIO; + } + + /* check if component is a core at all */ + if (wrappers[0] + wrappers[1] == 0) { + /* we could save addrl of the router + if (cid == BCMA_CORE_OOB_ROUTER) + */ + bcma_erom_skip_component(bus, eromptr); + return -ENXIO; + } + + if (bcma_erom_is_bridge(bus, eromptr)) { + bcma_erom_skip_component(bus, eromptr); + return -ENXIO; + } + + /* get & parse master ports */ + for (i = 0; i < ports[0]; i++) { + u32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr); + if (mst_port_d < 0) + return -EILSEQ; + } + + /* get & parse slave ports */ + for (i = 0; i < ports[1]; i++) { + for (j = 0; ; j++) { + tmp = bcma_erom_get_addr_desc(bus, eromptr, + SCAN_ADDR_TYPE_SLAVE, i); + if (tmp < 0) { + /* no more entries for port _i_ */ + /* pr_debug("erom: slave port %d " + * "has %d descriptors\n", i, j); */ + break; + } else { + if (i == 0 && j == 0) + core->addr = tmp; + } + } + } + + /* get & parse master wrappers */ + for (i = 0; i < wrappers[0]; i++) { + for (j = 0; ; j++) { + tmp = bcma_erom_get_addr_desc(bus, eromptr, + SCAN_ADDR_TYPE_MWRAP, i); + if (tmp < 0) { + /* no more entries for port _i_ */ + /* pr_debug("erom: master wrapper %d " + * "has %d descriptors\n", i, j); */ + break; + } else { + if (i == 0 && j == 0) + core->wrap = tmp; + } + } + } + + /* get & parse slave wrappers */ + for (i = 0; i < wrappers[1]; i++) { + u8 hack = (ports[1] == 1) ? 0 : 1; + for (j = 0; ; j++) { + tmp = bcma_erom_get_addr_desc(bus, eromptr, + SCAN_ADDR_TYPE_SWRAP, i + hack); + if (tmp < 0) { + /* no more entries for port _i_ */ + /* pr_debug("erom: master wrapper %d " + * has %d descriptors\n", i, j); */ + break; + } else { + if (wrappers[0] == 0 && !i && !j) + core->wrap = tmp; + } + } + } + return 0; +} + int bcma_bus_scan(struct bcma_bus *bus) { u32 erombase; u32 __iomem *eromptr, *eromend; - s32 cia, cib; - u8 ports[2], wrappers[2]; - s32 tmp; - u8 i, j; int err; @@ -236,112 +344,13 @@ int bcma_bus_scan(struct bcma_bus *bus) INIT_LIST_HEAD(&core->list); core->bus = bus; - /* get CIs */ - cia = bcma_erom_get_ci(bus, &eromptr); - if (cia < 0) { - bcma_erom_push_ent(&eromptr); - if (bcma_erom_is_end(bus, &eromptr)) - break; - err= -EILSEQ; - goto out; - } - cib = bcma_erom_get_ci(bus, &eromptr); - if (cib < 0) { - err= -EILSEQ; - goto out; - } - - /* parse CIs */ - core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT; - core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT; - core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT; - ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT; - ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT; - wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT; - wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT; - core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT; - - if (((core->id.manuf == BCMA_MANUF_ARM) && - (core->id.id == 0xFFF)) || - (ports[1] == 0)) { - bcma_erom_skip_component(bus, &eromptr); - continue; - } - - /* check if component is a core at all */ - if (wrappers[0] + wrappers[1] == 0) { - /* we could save addrl of the router - if (cid == BCMA_CORE_OOB_ROUTER) - */ - bcma_erom_skip_component(bus, &eromptr); - continue; - } - - if (bcma_erom_is_bridge(bus, &eromptr)) { - bcma_erom_skip_component(bus, &eromptr); + err = bcma_get_next_core(bus, &eromptr, core); + if (err == -ENXIO) continue; - } - - /* get & parse master ports */ - for (i = 0; i < ports[0]; i++) { - u32 mst_port_d = bcma_erom_get_mst_port(bus, &eromptr); - if (mst_port_d < 0) { - err= -EILSEQ; - goto out; - } - } - - /* get & parse slave ports */ - for (i = 0; i < ports[1]; i++) { - for (j = 0; ; j++) { - tmp = bcma_erom_get_addr_desc(bus, &eromptr, - SCAN_ADDR_TYPE_SLAVE, i); - if (tmp < 0) { - /* no more entries for port _i_ */ - /* pr_debug("erom: slave port %d " - * "has %d descriptors\n", i, j); */ - break; - } else { - if (i == 0 && j == 0) - core->addr = tmp; - } - } - } - - /* get & parse master wrappers */ - for (i = 0; i < wrappers[0]; i++) { - for (j = 0; ; j++) { - tmp = bcma_erom_get_addr_desc(bus, &eromptr, - SCAN_ADDR_TYPE_MWRAP, i); - if (tmp < 0) { - /* no more entries for port _i_ */ - /* pr_debug("erom: master wrapper %d " - * "has %d descriptors\n", i, j); */ - break; - } else { - if (i == 0 && j == 0) - core->wrap = tmp; - } - } - } - - /* get & parse slave wrappers */ - for (i = 0; i < wrappers[1]; i++) { - u8 hack = (ports[1] == 1) ? 0 : 1; - for (j = 0; ; j++) { - tmp = bcma_erom_get_addr_desc(bus, &eromptr, - SCAN_ADDR_TYPE_SWRAP, i + hack); - if (tmp < 0) { - /* no more entries for port _i_ */ - /* pr_debug("erom: master wrapper %d " - * has %d descriptors\n", i, j); */ - break; - } else { - if (wrappers[0] == 0 && !i && !j) - core->wrap = tmp; - } - } - } + else if (err == -ESPIPE) + break; + else if (err < 0) + return err; pr_info("Core %d found: %s " "(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n", @@ -351,9 +360,6 @@ int bcma_bus_scan(struct bcma_bus *bus) core->core_index = bus->nr_cores++; list_add(&core->list, &bus->cores); - continue; -out: - return err; } return 0; |