lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

firewire: normalize STATE_CLEAR/SET CSR access interface

Browse Source 
Push the maintenance of STATE_CLEAR/SET.abdicate down into the card
driver.  This way, the read/write_csr_reg driver method works uniformly
across all CSR offsets.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter
2010-06-12 20:34:50 +02:00
parent db3c9cc105
commit c8a94ded57
5 changed files with 30 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/firewire/ohci.c
View File

@ -174,6 +174,7 @@ struct fw_ohci {
unsigned int pri_req_max;
u32 bus_time;
bool is_root;
bool csr_state_setclear_abdicate;
/*
* Spinlock for accessing fw_ohci data. Never call out of
@ -1529,7 +1530,9 @@ static void bus_reset_tasklet(unsigned long data)
self_id_count, ohci->self_id_buffer);
fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation,
self_id_count, ohci->self_id_buffer);
self_id_count, ohci->self_id_buffer,
ohci->csr_state_setclear_abdicate);
ohci->csr_state_setclear_abdicate = false;
}
static irqreturn_t irq_handler(int irq, void *data)
@ -2032,13 +2035,16 @@ static u32 ohci_read_csr_reg(struct fw_card *card, int csr_offset)
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;
value = CSR_STATE_BIT_CMSTR;
else
return 0;
value = 0;
if (ohci->csr_state_setclear_abdicate)
value |= CSR_STATE_BIT_ABDICATE;
return value;
case CSR_NODE_IDS:
return reg_read(ohci, OHCI1394_NodeID) << 16;
@ -2078,12 +2084,13 @@ static void ohci_write_csr_reg(struct fw_card *card, int csr_offset, u32 value)
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);
}
if (value & CSR_STATE_BIT_ABDICATE)
ohci->csr_state_setclear_abdicate = false;
break;
case CSR_STATE_SET:
@ -2092,6 +2099,8 @@ static void ohci_write_csr_reg(struct fw_card *card, int csr_offset, u32 value)
OHCI1394_LinkControl_cycleMaster);
flush_writes(ohci);
}
if (value & CSR_STATE_BIT_ABDICATE)
ohci->csr_state_setclear_abdicate = true;
break;
case CSR_NODE_IDS: