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firewire: add CSR BUSY_TIMEOUT support

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Implement the BUSY_TIMEOUT register, which is required for nodes that
support retries.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2010-06-10 08:34:13 +02:00
parent a48777e03a
commit 27a2329f82
2 changed files with 24 additions and 4 deletions
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14
drivers/firewire/core-transaction.c
View File

@ -1115,6 +1115,17 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
rcode = RCODE_TYPE_ERROR;
break;
case CSR_BUSY_TIMEOUT:
if (tcode == TCODE_READ_QUADLET_REQUEST)
*data = cpu_to_be32(card->driver->
read_csr_reg(card, CSR_BUSY_TIMEOUT));
else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
card->driver->write_csr_reg(card, CSR_BUSY_TIMEOUT,
be32_to_cpu(*data));
else
rcode = RCODE_TYPE_ERROR;
break;
case CSR_BROADCAST_CHANNEL:
if (tcode == TCODE_READ_QUADLET_REQUEST)
*data = cpu_to_be32(card->broadcast_channel);
@ -1140,9 +1151,6 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
BUG();
break;
case CSR_BUSY_TIMEOUT:
/* FIXME: Implement this. */
default:
rcode = RCODE_ADDRESS_ERROR;
break;

14
drivers/firewire/ohci.c
View File

@ -1731,7 +1731,8 @@ static int ohci_enable(struct fw_card *card,
reg_write(ohci, OHCI1394_ATRetries,
OHCI1394_MAX_AT_REQ_RETRIES |
(OHCI1394_MAX_AT_RESP_RETRIES << 4) |
(OHCI1394_MAX_PHYS_RESP_RETRIES << 8));
(OHCI1394_MAX_PHYS_RESP_RETRIES << 8) |
(200 << 16));
seconds = lower_32_bits(get_seconds());
reg_write(ohci, OHCI1394_IsochronousCycleTimer, seconds << 25);
@ -2023,6 +2024,10 @@ static u32 ohci_read_csr_reg(struct fw_card *card, int csr_offset)
spin_unlock_irqrestore(&ohci->lock, flags);
return value;
case CSR_BUSY_TIMEOUT:
value = reg_read(ohci, OHCI1394_ATRetries);
return (value >> 4) & 0x0ffff00f;
default:
WARN_ON(1);
return 0;
@ -2053,6 +2058,13 @@ static void ohci_write_csr_reg(struct fw_card *card, int csr_offset, u32 value)
spin_unlock_irqrestore(&ohci->lock, flags);
break;
case CSR_BUSY_TIMEOUT:
value = (value & 0xf) | ((value & 0xf) << 4) |
((value & 0xf) << 8) | ((value & 0x0ffff000) << 4);
reg_write(ohci, OHCI1394_ATRetries, value);
flush_writes(ohci);
break;
default:
WARN_ON(1);
break;