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firewire: Implement CSR cycle time and bus time registers.

Forráskód böngészése 
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg
2007-03-07 12:12:56 -05:00
committed by Stefan Richter
szülő 473d28c730
commit d60d7f1d5c
3 fájl változott, egészen pontosan 86 új sor hozzáadva és 3 régi sor törölve
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61
drivers/firewire/fw-transaction.c
Fájl megtekintése

@@ -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(&registers,
&registers_region);
BUG_ON(retval < 0);
/* Add the vendor textual descriptor. */
retval = fw_core_add_descriptor(&vendor_id_descriptor);
BUG_ON(retval < 0);