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firewire: implement broadcast_channel CSR for 1394a compliance 

See IEEE 1394a clause 8.3.2.3.11.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2008-05-24 16:41:09 +02:00
parent 435f972697
commit e534fe16b9
3 changed files with 22 additions and 3 deletions
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1
drivers/firewire/fw-card.c
View File

@ -403,6 +403,7 @@ fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
card->current_tlabel = 0;
card->tlabel_mask = 0;
card->color = 0;
card->broadcast_channel = BROADCAST_CHANNEL_INITIAL;
INIT_LIST_HEAD(&card->transaction_list);
spin_lock_init(&card->lock);

20
drivers/firewire/fw-transaction.c
View File

@ -817,12 +817,13 @@ handle_registers(struct fw_card *card, struct fw_request *request,
int reg = offset & ~CSR_REGISTER_BASE;
unsigned long long bus_time;
__be32 *data = payload;
int rcode = RCODE_COMPLETE;
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);
rcode = RCODE_TYPE_ERROR;
break;
}
@ -831,7 +832,17 @@ handle_registers(struct fw_card *card, struct fw_request *request,
*data = cpu_to_be32(bus_time);
else
*data = cpu_to_be32(bus_time >> 25);
fw_send_response(card, request, RCODE_COMPLETE);
break;
case CSR_BROADCAST_CHANNEL:
if (tcode == TCODE_READ_QUADLET_REQUEST)
*data = cpu_to_be32(card->broadcast_channel);
else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
card->broadcast_channel =
(be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) |
BROADCAST_CHANNEL_INITIAL;
else
rcode = RCODE_TYPE_ERROR;
break;
case CSR_BUS_MANAGER_ID:
@ -850,10 +861,13 @@ handle_registers(struct fw_card *card, struct fw_request *request,
case CSR_BUSY_TIMEOUT:
/* FIXME: Implement this. */
default:
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
rcode = RCODE_ADDRESS_ERROR;
break;
}
fw_send_response(card, request, rcode);
}
static struct fw_address_handler registers = {

4
drivers/firewire/fw-transaction.h
View File

@ -80,6 +80,9 @@
#define CSR_SPEED_MAP 0x2000
#define CSR_SPEED_MAP_END 0x3000
#define BROADCAST_CHANNEL_INITIAL (1 << 31 | 31)
#define BROADCAST_CHANNEL_VALID (1 << 30)
#define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args)
#define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
@ -236,6 +239,7 @@ struct fw_card {
*/
int self_id_count;
u32 topology_map[252 + 3];
u32 broadcast_channel;
spinlock_t lock; /* Take this lock when handling the lists in
* this struct. */