Date: Sat, 12 Jun 2010 20:30:21 +0200 (CEST) From: Stefan Richter Subject: firewire: replace get_features card driver hook by feature variables in the fw_card struct. The hook appeared to be an unnecessary abstraction in the card driver interface. Cleaner would be to pass those feature flags as arguments to fw_card_initialize() or fw_card_add(), but the FairnessControl register is in the SCLK domain and may therefore not be accessible while Link Power Status is off, i.e. before the card->driver->enable call from fw_card_add(). Signed-off-by: Stefan Richter --- drivers/firewire/core-topology.c | 3 +-- drivers/firewire/core-transaction.c | 3 +-- drivers/firewire/core.h | 5 ----- drivers/firewire/ohci.c | 14 ++------------ include/linux/firewire.h | 3 +++ 5 files changed, 7 insertions(+), 21 deletions(-) Index: b/drivers/firewire/core-topology.c =================================================================== --- a/drivers/firewire/core-topology.c +++ b/drivers/firewire/core-topology.c @@ -543,8 +543,7 @@ void fw_core_handle_bus_reset(struct fw_ spin_lock_irqsave(&card->lock, flags); - card->broadcast_channel_allocated = (card->driver->get_features(card) & - FEATURE_CHANNEL_31_ALLOCATED) != 0; + card->broadcast_channel_allocated = card->broadcast_channel_auto_allocated; card->node_id = node_id; /* * Update node_id before generation to prevent anybody from using Index: b/drivers/firewire/core-transaction.c =================================================================== --- a/drivers/firewire/core-transaction.c +++ b/drivers/firewire/core-transaction.c @@ -1129,8 +1129,7 @@ static void handle_registers(struct fw_c break; case CSR_PRIORITY_BUDGET: - if (!(card->driver->get_features(card) & - FEATURE_PRIORITY_BUDGET)) + if (!card->priority_budget_implemented) rcode = RCODE_ADDRESS_ERROR; else if (tcode == TCODE_READ_QUADLET_REQUEST) *data = cpu_to_be32(card->driver-> Index: b/drivers/firewire/core.h =================================================================== --- a/drivers/firewire/core.h +++ b/drivers/firewire/core.h @@ -38,9 +38,6 @@ struct fw_packet; #define BROADCAST_CHANNEL_INITIAL (1 << 31 | 31) #define BROADCAST_CHANNEL_VALID (1 << 30) -#define FEATURE_PRIORITY_BUDGET 0x01 -#define FEATURE_CHANNEL_31_ALLOCATED 0x02 - #define CSR_STATE_BIT_CMSTR (1 << 8) #define CSR_STATE_BIT_ABDICATE (1 << 10) @@ -84,8 +81,6 @@ struct fw_card_driver { u32 (*read_csr_reg)(struct fw_card *card, int csr_offset); void (*write_csr_reg)(struct fw_card *card, int csr_offset, u32 value); - unsigned int (*get_features)(struct fw_card *card); - struct fw_iso_context * (*allocate_iso_context)(struct fw_card *card, int type, int channel, size_t header_size); Index: b/drivers/firewire/ohci.c =================================================================== --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -172,7 +172,6 @@ struct fw_ohci { int request_generation; /* for timestamping incoming requests */ unsigned quirks; unsigned int pri_req_max; - unsigned int features; u32 bus_time; bool is_root; @@ -1758,15 +1757,14 @@ static int ohci_enable(struct fw_card *c if (version >= OHCI_VERSION_1_1) { reg_write(ohci, OHCI1394_InitialChannelsAvailableHi, 0xfffffffe); - ohci->features |= FEATURE_CHANNEL_31_ALLOCATED; + card->broadcast_channel_auto_allocated = true; } /* Get implemented bits of the priority arbitration request counter. */ reg_write(ohci, OHCI1394_FairnessControl, 0x3f); ohci->pri_req_max = reg_read(ohci, OHCI1394_FairnessControl) & 0x3f; reg_write(ohci, OHCI1394_FairnessControl, 0); - if (ohci->pri_req_max != 0) - ohci->features |= FEATURE_PRIORITY_BUDGET; + card->priority_budget_implemented = ohci->pri_req_max != 0; ar_context_run(&ohci->ar_request_ctx); ar_context_run(&ohci->ar_response_ctx); @@ -2137,13 +2135,6 @@ static void ohci_write_csr_reg(struct fw } } -static unsigned int ohci_get_features(struct fw_card *card) -{ - struct fw_ohci *ohci = fw_ohci(card); - - return ohci->features; -} - static void copy_iso_headers(struct iso_context *ctx, void *p) { int i = ctx->header_length; @@ -2583,7 +2574,6 @@ static const struct fw_card_driver ohci_ .enable_phys_dma = ohci_enable_phys_dma, .read_csr_reg = ohci_read_csr_reg, .write_csr_reg = ohci_write_csr_reg, - .get_features = ohci_get_features, .allocate_iso_context = ohci_allocate_iso_context, .free_iso_context = ohci_free_iso_context, Index: b/include/linux/firewire.h =================================================================== --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -122,6 +122,9 @@ struct fw_card { bool bm_abdicate; /* value of csr_abdicate before last bus reset */ bool csr_abdicate; /* visible in CSR STATE_CLEAR/SET registers */ + bool priority_budget_implemented; /* controller feature */ + bool broadcast_channel_auto_allocated; /* controller feature */ + bool broadcast_channel_allocated; u32 broadcast_channel; __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];