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qcacmn: Disable the PCIE scratch reg write for wake req handshake

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Disable the PCIE scratch reg read/write to wake up PCI bus.
This fixes the PCNOC error seen during boot up on writing to
the PCIE scratch register.
Enable DEVICE_FORCE_WAKE_ENABLE feature flag to enable
PCIE sracth reg read/write.

Change-Id: If4efd0afbddf97462bf9d0f06d0085c0a5b37a64
CRs-Fixed: 2636160
This commit is contained in:
Nisha Menon 2020-03-17 13:13:00 -07:00 • committed by nshrivas
commit df7fb3627f
1 changed files with 34 additions and 0 deletions
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36
hif/src/pcie/if_pci.c
View file

@ -4762,6 +4762,7 @@ bool hif_pci_needs_bmi(struct hif_softc *scn)
}
#ifdef FORCE_WAKE
#ifdef DEVICE_FORCE_WAKE_ENABLE
int hif_force_wake_request(struct hif_opaque_softc *hif_handle)
{
uint32_t timeout = 0, value;
@ -4818,10 +4819,43 @@ int hif_force_wake_request(struct hif_opaque_softc *hif_handle)
}
HIF_STATS_INC(pci_scn, soc_force_wake_success, 1);
return 0;
}
#else /* DEVICE_FORCE_WAKE_ENABLE */
/** hif_force_wake_request() - Disable the PCIE scratch register
* write/read
*
* Return: 0
*/
int hif_force_wake_request(struct hif_opaque_softc *hif_handle)
{
uint32_t timeout = 0;
struct hif_softc *scn = (struct hif_softc *)hif_handle;
struct hif_pci_softc *pci_scn = HIF_GET_PCI_SOFTC(scn);
if (pld_force_wake_request(scn->qdf_dev->dev)) {
hif_err("force wake request send failed");
return -EINVAL;
}
HIF_STATS_INC(pci_scn, mhi_force_wake_request_vote, 1);
while (!pld_is_device_awake(scn->qdf_dev->dev) &&
timeout <= FORCE_WAKE_DELAY_TIMEOUT_MS) {
qdf_mdelay(FORCE_WAKE_DELAY_MS);
timeout += FORCE_WAKE_DELAY_MS;
}
if (pld_is_device_awake(scn->qdf_dev->dev) <= 0) {
hif_err("Unable to wake up mhi");
HIF_STATS_INC(pci_scn, mhi_force_wake_failure, 1);
return -EINVAL;
}
HIF_STATS_INC(pci_scn, mhi_force_wake_success, 1);
return 0;
}
#endif /* DEVICE_FORCE_WAKE_ENABLE */
int hif_force_wake_release(struct hif_opaque_softc *hif_handle)
{
int ret;