diff options
Diffstat (limited to 'drivers/firewire/fw-transaction.c')
| -rw-r--r-- | drivers/firewire/fw-transaction.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c index 38b286ed744f..d36dd512a59d 100644 --- a/drivers/firewire/fw-transaction.c +++ b/drivers/firewire/fw-transaction.c @@ -752,10 +752,65 @@ handle_topology_map(struct fw_card *card, struct fw_request *request, } static struct fw_address_handler topology_map = { - .length = 0x400, + .length = 0x200, .address_callback = handle_topology_map, }; +const struct fw_address_region registers_region = + { .start = 0xfffff0000000ull, .end = 0xfffff0000400ull, }; + +static void +handle_registers(struct fw_card *card, struct fw_request *request, + int tcode, int destination, int source, + int generation, int speed, + unsigned long long offset, + void *payload, size_t length, void *callback_data) +{ + int reg = offset - CSR_REGISTER_BASE; + unsigned long long bus_time; + __be32 *data = payload; + + switch (reg) { + case CSR_CYCLE_TIME: + case CSR_BUS_TIME: + if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) { + fw_send_response(card, request, RCODE_TYPE_ERROR); + break; + } + + bus_time = card->driver->get_bus_time(card); + if (reg == CSR_CYCLE_TIME) + *data = cpu_to_be32(bus_time); + else + *data = cpu_to_be32(bus_time >> 25); + fw_send_response(card, request, RCODE_COMPLETE); + break; + + case CSR_BUS_MANAGER_ID: + case CSR_BANDWIDTH_AVAILABLE: + case CSR_CHANNELS_AVAILABLE_HI: + case CSR_CHANNELS_AVAILABLE_LO: + /* FIXME: these are handled by the OHCI hardware and + * the stack never sees these request. If we add + * support for a new type of controller that doesn't + * handle this in hardware we need to deal with these + * transactions. */ + BUG(); + break; + + case CSR_BUSY_TIMEOUT: + /* FIXME: Implement this. */ + default: + fw_send_response(card, request, RCODE_ADDRESS_ERROR); + break; + } +} + +static struct fw_address_handler registers = { + .length = 0x400, + .address_callback = handle_registers, +}; + MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); MODULE_LICENSE("GPL"); @@ -811,6 +866,10 @@ static int __init fw_core_init(void) &topology_map_region); BUG_ON(retval < 0); + retval = fw_core_add_address_handler(®isters, + ®isters_region); + BUG_ON(retval < 0); + /* Add the vendor textual descriptor. */ retval = fw_core_add_descriptor(&vendor_id_descriptor); BUG_ON(retval < 0); |