diff options
Diffstat (limited to 'drivers/staging/heci/heci_interface.c')
| -rw-r--r-- | drivers/staging/heci/heci_interface.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/staging/heci/heci_interface.c b/drivers/staging/heci/heci_interface.c index c5f51a7ddf2c..03e1df1a88a0 100644 --- a/drivers/staging/heci/heci_interface.c +++ b/drivers/staging/heci/heci_interface.c @@ -44,12 +44,15 @@ /** - * heci_set_csr_register - write H_CSR register to the heci device + * heci_set_csr_register - write H_CSR register to the heci device, + * and ignore the H_IS bit for it is write-one-to-zero. * * @dev: device object for our driver */ void heci_set_csr_register(struct iamt_heci_device *dev) { + if ((dev->host_hw_state & H_IS) == H_IS) + dev->host_hw_state &= ~H_IS; write_heci_register(dev, H_CSR, dev->host_hw_state); dev->host_hw_state = read_heci_register(dev, H_CSR); } @@ -76,6 +79,16 @@ void heci_csr_disable_interrupts(struct iamt_heci_device *dev) heci_set_csr_register(dev); } +/** + * heci_csr_clear_his - clear H_IS bit in H_CSR + * + * @dev: device object for our driver + */ +void heci_csr_clear_his(struct iamt_heci_device *dev) +{ + write_heci_register(dev, H_CSR, dev->host_hw_state); + dev->host_hw_state = read_heci_register(dev, H_CSR); +} /** * _host_get_filled_slots - get number of device filled buffer slots @@ -185,7 +198,7 @@ int heci_write_message(struct iamt_heci_device *dev, } dev->host_hw_state |= H_IG; - write_heci_register(dev, H_CSR, dev->host_hw_state); + heci_set_csr_register(dev); dev->me_hw_state = read_heci_register(dev, ME_CSR_HA); if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA) return 0; |