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soc: qcom: glink_spi_xprt: Add support for WDSP SSR

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Handle WDSP_EVENT_PRE_SHUTDOWN event to indicate link down event to G-Link
core and the clients of G-Link. Handle WDSP_EVENT_POST_BOOTUP event to
indicate link up event.

CRs-Fixed: 1080354
Change-Id: I12c04ceb7af51cc5d2f0c79b524ef783dc5f749e
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>
This commit is contained in:
Karthikeyan Ramasubramanian 2016-09-26 17:30:08 -06:00
parent 1ff56658f3
commit 4c65e88972
1 changed files with 12 additions and 7 deletions
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19
drivers/soc/qcom/glink_spi_xprt.c
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@ -875,21 +875,20 @@ static void __rx_worker(struct edge_info *einfo)
int rcu_id; int rcu_id;
rcu_id = srcu_read_lock(&einfo->use_ref); rcu_id = srcu_read_lock(&einfo->use_ref);
if (einfo->in_ssr) {
srcu_read_unlock(&einfo->use_ref, rcu_id);
return;
}
if (unlikely(!einfo->rx_fifo_start)) { if (unlikely(!einfo->rx_fifo_start)) {
rx_avail = glink_spi_xprt_read_avail(einfo); rx_avail = glink_spi_xprt_read_avail(einfo);
if (!rx_avail) { if (!rx_avail) {
srcu_read_unlock(&einfo->use_ref, rcu_id); srcu_read_unlock(&einfo->use_ref, rcu_id);
return; return;
} }
einfo->in_ssr = false;
einfo->xprt_if.glink_core_if_ptr->link_up(&einfo->xprt_if); einfo->xprt_if.glink_core_if_ptr->link_up(&einfo->xprt_if);
} }
if (einfo->in_ssr) {
srcu_read_unlock(&einfo->use_ref, rcu_id);
return;
}
glink_spi_xprt_set_poll_mode(einfo); glink_spi_xprt_set_poll_mode(einfo);
while (inactive_cycles < MAX_INACTIVE_CYCLES) { while (inactive_cycles < MAX_INACTIVE_CYCLES) {
if (einfo->tx_resume_needed && if (einfo->tx_resume_needed &&
@ -1818,9 +1817,16 @@ static int glink_wdsp_cmpnt_event_handler(struct device *dev,
spi_dev = to_spi_device(sdev); spi_dev = to_spi_device(sdev);
einfo->spi_dev = spi_dev; einfo->spi_dev = spi_dev;
break; break;
case WDSP_EVENT_POST_BOOTUP:
einfo->in_ssr = false;
synchronize_srcu(&einfo->use_ref);
/* No break here to trigger fake rx_worker */
case WDSP_EVENT_IPC1_INTR: case WDSP_EVENT_IPC1_INTR:
queue_kthread_work(&einfo->kworker, &einfo->kwork); queue_kthread_work(&einfo->kworker, &einfo->kwork);
break; break;
case WDSP_EVENT_PRE_SHUTDOWN:
ssr(&einfo->xprt_if);
break;
default: default:
pr_debug("%s: unhandled event %d", __func__, event); pr_debug("%s: unhandled event %d", __func__, event);
break; break;
@ -2040,7 +2046,6 @@ static int glink_spi_probe(struct platform_device *pdev)
init_xprt_cfg(einfo, subsys_name); init_xprt_cfg(einfo, subsys_name);
init_xprt_if(einfo); init_xprt_if(einfo);
einfo->in_ssr = true;
einfo->fifo_size = DEFAULT_FIFO_SIZE; einfo->fifo_size = DEFAULT_FIFO_SIZE;
init_kthread_work(&einfo->kwork, rx_worker); init_kthread_work(&einfo->kwork, rx_worker);
init_kthread_worker(&einfo->kworker); init_kthread_worker(&einfo->kworker);