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firewire: ohci: use an ID table for quirks detection 

We don't have a lot of quirks to take into account (especially since
dual-buffer IR is out of the picture), but still, a table-based approach
is more organized than a series of if () clauses.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2010-02-21 17:58:01 +01:00
parent ecb1cf9c44
commit 4a635593f4
1 changed files with 28 additions and 18 deletions
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46
drivers/firewire/ohci.c
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@ -169,10 +169,7 @@ struct fw_ohci {
int node_id;
int generation;
int request_generation; /* for timestamping incoming requests */
bool old_uninorth;
bool bus_reset_packet_quirk;
bool iso_cycle_timer_quirk;
unsigned quirks;
/*
* Spinlock for accessing fw_ohci data. Never call out of
@ -234,6 +231,21 @@ static inline struct fw_ohci *fw_ohci(struct fw_card *card)
static char ohci_driver_name[] = KBUILD_MODNAME;
#define QUIRK_CYCLE_TIMER 1
#define QUIRK_RESET_PACKET 2
#define QUIRK_BE_HEADERS 4
/* In case of multiple matches in ohci_quirks[], only the first one is used. */
static const struct {
unsigned short vendor, device, flags;
} ohci_quirks[] = {
{PCI_VENDOR_ID_TI, PCI_ANY_ID, QUIRK_RESET_PACKET},
{PCI_VENDOR_ID_AL, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
{PCI_VENDOR_ID_NEC, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
{PCI_VENDOR_ID_VIA, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
{PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS},
};
#ifdef CONFIG_FIREWIRE_OHCI_DEBUG
#define OHCI_PARAM_DEBUG_AT_AR 1
@ -507,7 +519,7 @@ static void ar_context_release(struct ar_context *ctx)
#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
#define cond_le32_to_cpu(v) \
(ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
(ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v))
#else
#define cond_le32_to_cpu(v) le32_to_cpu(v)
#endif
@ -588,7 +600,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
* at a slightly incorrect time (in bus_reset_tasklet).
*/
if (evt == OHCI1394_evt_bus_reset) {
if (!ohci->bus_reset_packet_quirk)
if (!(ohci->quirks & QUIRK_RESET_PACKET))
ohci->request_generation = (p.header[2] >> 16) & 0xff;
} else if (ctx == &ohci->ar_request_ctx) {
fw_core_handle_request(&ohci->card, &p);
@ -1312,7 +1324,7 @@ static void bus_reset_tasklet(unsigned long data)
context_stop(&ohci->at_response_ctx);
reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
if (ohci->bus_reset_packet_quirk)
if (ohci->quirks & QUIRK_RESET_PACKET)
ohci->request_generation = generation;
/*
@ -1806,7 +1818,7 @@ static u32 ohci_get_cycle_time(struct fw_card *card)
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
if (ohci->iso_cycle_timer_quirk) {
if (ohci->quirks & QUIRK_CYCLE_TIMER) {
i = 0;
c1 = c2;
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
@ -2308,7 +2320,7 @@ static int __devinit pci_probe(struct pci_dev *dev,
struct fw_ohci *ohci;
u32 bus_options, max_receive, link_speed, version;
u64 guid;
int err;
int i, err;
size_t size;
ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
@ -2351,15 +2363,13 @@ static int __devinit pci_probe(struct pci_dev *dev,
version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
#endif
ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
ohci->iso_cycle_timer_quirk = dev->vendor == PCI_VENDOR_ID_AL ||
dev->vendor == PCI_VENDOR_ID_NEC ||
dev->vendor == PCI_VENDOR_ID_VIA;
for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++)
if (ohci_quirks[i].vendor == dev->vendor &&
(ohci_quirks[i].device == dev->device ||
ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) {
ohci->quirks = ohci_quirks[i].flags;
break;
}
ar_context_init(&ohci->ar_request_ctx, ohci,
OHCI1394_AsReqRcvContextControlSet);