diff options
Diffstat (limited to 'drivers/firewire/ohci.c')
| -rw-r--r-- | drivers/firewire/ohci.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 0e54135..1dcc2e4 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -172,6 +172,7 @@ struct fw_ohci { unsigned quirks; unsigned int pri_req_max; u32 bus_time; + bool is_root; /* * Spinlock for accessing fw_ohci data. Never call out of @@ -1400,6 +1401,7 @@ static void bus_reset_tasklet(unsigned long data) unsigned long flags; void *free_rom = NULL; dma_addr_t free_rom_bus = 0; + bool is_new_root; reg = reg_read(ohci, OHCI1394_NodeID); if (!(reg & OHCI1394_NodeID_idValid)) { @@ -1413,6 +1415,12 @@ static void bus_reset_tasklet(unsigned long data) ohci->node_id = reg & (OHCI1394_NodeID_busNumber | OHCI1394_NodeID_nodeNumber); + is_new_root = (reg & OHCI1394_NodeID_root) != 0; + if (!(ohci->is_root && is_new_root)) + reg_write(ohci, OHCI1394_LinkControlSet, + OHCI1394_LinkControl_cycleMaster); + ohci->is_root = is_new_root; + reg = reg_read(ohci, OHCI1394_SelfIDCount); if (reg & OHCI1394_SelfIDCount_selfIDError) { fw_notify("inconsistent self IDs\n"); @@ -2013,6 +2021,16 @@ static u32 ohci_read_csr_reg(struct fw_card *card, int csr_offset) u32 value; switch (csr_offset) { + case CSR_STATE_CLEAR: + case CSR_STATE_SET: + /* the controller driver handles only the cmstr bit */ + if (ohci->is_root && + (reg_read(ohci, OHCI1394_LinkControlSet) & + OHCI1394_LinkControl_cycleMaster)) + return CSR_STATE_BIT_CMSTR; + else + return 0; + case CSR_NODE_IDS: return reg_read(ohci, OHCI1394_NodeID) << 16; @@ -2050,6 +2068,23 @@ static void ohci_write_csr_reg(struct fw_card *card, int csr_offset, u32 value) unsigned long flags; switch (csr_offset) { + case CSR_STATE_CLEAR: + /* the controller driver handles only the cmstr bit */ + if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { + reg_write(ohci, OHCI1394_LinkControlClear, + OHCI1394_LinkControl_cycleMaster); + flush_writes(ohci); + } + break; + + case CSR_STATE_SET: + if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { + reg_write(ohci, OHCI1394_LinkControlSet, + OHCI1394_LinkControl_cycleMaster); + flush_writes(ohci); + } + break; + case CSR_NODE_IDS: reg_write(ohci, OHCI1394_NodeID, value >> 16); flush_writes(ohci); |