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Message-Id: <1691460215-45383-1-git-send-email-quic_qianyu@quicinc.com>
Date: Tue, 8 Aug 2023 10:03:35 +0800
From: Qiang Yu <quic_qianyu@...cinc.com>
To: mani@...nel.org, quic_jhugo@...cinc.com
Cc: mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org, quic_cang@...cinc.com,
quic_mrana@...cinc.com, Qiang Yu <quic_qianyu@...cinc.com>
Subject: [PATCH] bus: mhi: host: pci_generic: Add SDX75 based modem support
Add generic info for SDX75 based modems. SDX75 takes longer than expected
(default, 8 seconds) to set ready after reboot. Hence add optional ready
timeout parameter to wait enough for device ready as part of power up
sequence.
Signed-off-by: Qiang Yu <quic_qianyu@...cinc.com>
---
drivers/bus/mhi/host/init.c | 1 +
drivers/bus/mhi/host/main.c | 7 ++++++-
drivers/bus/mhi/host/pci_generic.c | 22 ++++++++++++++++++++++
drivers/bus/mhi/host/pm.c | 6 +++++-
include/linux/mhi.h | 4 ++++
5 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c
index f78aefd..65ceac1 100644
--- a/drivers/bus/mhi/host/init.c
+++ b/drivers/bus/mhi/host/init.c
@@ -881,6 +881,7 @@ static int parse_config(struct mhi_controller *mhi_cntrl,
if (!mhi_cntrl->timeout_ms)
mhi_cntrl->timeout_ms = MHI_TIMEOUT_MS;
+ mhi_cntrl->ready_timeout_ms = config->ready_timeout_ms;
mhi_cntrl->bounce_buf = config->use_bounce_buf;
mhi_cntrl->buffer_len = config->buf_len;
if (!mhi_cntrl->buffer_len)
diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
index 74a7543..8590926 100644
--- a/drivers/bus/mhi/host/main.c
+++ b/drivers/bus/mhi/host/main.c
@@ -43,8 +43,13 @@ int __must_check mhi_poll_reg_field(struct mhi_controller *mhi_cntrl,
u32 mask, u32 val, u32 delayus)
{
int ret;
- u32 out, retry = (mhi_cntrl->timeout_ms * 1000) / delayus;
+ u32 out, retry;
+ u32 timeout_ms = mhi_cntrl->timeout_ms;
+ if (mhi_cntrl->ready_timeout_ms && mask == MHISTATUS_READY_MASK)
+ timeout_ms = mhi_cntrl->ready_timeout_ms;
+
+ retry = (timeout_ms * 1000) / delayus;
while (retry--) {
ret = mhi_read_reg_field(mhi_cntrl, base, offset, mask, &out);
if (ret)
diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index fcd80bc..9c601f0 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -269,6 +269,16 @@ static struct mhi_event_config modem_qcom_v1_mhi_events[] = {
MHI_EVENT_CONFIG_HW_DATA(5, 2048, 101)
};
+static const struct mhi_controller_config modem_qcom_v2_mhiv_config = {
+ .max_channels = 128,
+ .timeout_ms = 8000,
+ .ready_timeout_ms = 50000,
+ .num_channels = ARRAY_SIZE(modem_qcom_v1_mhi_channels),
+ .ch_cfg = modem_qcom_v1_mhi_channels,
+ .num_events = ARRAY_SIZE(modem_qcom_v1_mhi_events),
+ .event_cfg = modem_qcom_v1_mhi_events,
+};
+
static const struct mhi_controller_config modem_qcom_v1_mhiv_config = {
.max_channels = 128,
.timeout_ms = 8000,
@@ -278,6 +288,16 @@ static const struct mhi_controller_config modem_qcom_v1_mhiv_config = {
.event_cfg = modem_qcom_v1_mhi_events,
};
+static const struct mhi_pci_dev_info mhi_qcom_sdx75_info = {
+ .name = "qcom-sdx75m",
+ .fw = "qcom/sdx75m/xbl.elf",
+ .edl = "qcom/sdx75m/edl.mbn",
+ .config = &modem_qcom_v2_mhiv_config,
+ .bar_num = MHI_PCI_DEFAULT_BAR_NUM,
+ .dma_data_width = 32,
+ .sideband_wake = false,
+};
+
static const struct mhi_pci_dev_info mhi_qcom_sdx65_info = {
.name = "qcom-sdx65m",
.fw = "qcom/sdx65m/xbl.elf",
@@ -597,6 +617,8 @@ static const struct pci_device_id mhi_pci_id_table[] = {
.driver_data = (kernel_ulong_t) &mhi_telit_fn990_info },
{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0308),
.driver_data = (kernel_ulong_t) &mhi_qcom_sdx65_info },
+ { PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0309),
+ .driver_data = (kernel_ulong_t) &mhi_qcom_sdx75_info },
{ PCI_DEVICE(PCI_VENDOR_ID_QUECTEL, 0x1001), /* EM120R-GL (sdx24) */
.driver_data = (kernel_ulong_t) &mhi_quectel_em1xx_info },
{ PCI_DEVICE(PCI_VENDOR_ID_QUECTEL, 0x1002), /* EM160R-GL (sdx24) */
diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c
index 8a4362d..6f049e0 100644
--- a/drivers/bus/mhi/host/pm.c
+++ b/drivers/bus/mhi/host/pm.c
@@ -1202,14 +1202,18 @@ EXPORT_SYMBOL_GPL(mhi_power_down);
int mhi_sync_power_up(struct mhi_controller *mhi_cntrl)
{
int ret = mhi_async_power_up(mhi_cntrl);
+ u32 timeout_ms;
if (ret)
return ret;
+ /* Some devices need more time to set ready during power up */
+ timeout_ms = mhi_cntrl->ready_timeout_ms ?
+ mhi_cntrl->ready_timeout_ms : mhi_cntrl->timeout_ms;
wait_event_timeout(mhi_cntrl->state_event,
MHI_IN_MISSION_MODE(mhi_cntrl->ee) ||
MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
+ msecs_to_jiffies(timeout_ms));
ret = (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -ETIMEDOUT;
if (ret)
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index f6de4b6..a43e5f8 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -266,6 +266,7 @@ struct mhi_event_config {
* struct mhi_controller_config - Root MHI controller configuration
* @max_channels: Maximum number of channels supported
* @timeout_ms: Timeout value for operations. 0 means use default
+ * @ready_timeout_ms: Timeout value for waiting device to be ready (optional)
* @buf_len: Size of automatically allocated buffers. 0 means use default
* @num_channels: Number of channels defined in @ch_cfg
* @ch_cfg: Array of defined channels
@@ -277,6 +278,7 @@ struct mhi_event_config {
struct mhi_controller_config {
u32 max_channels;
u32 timeout_ms;
+ u32 ready_timeout_ms;
u32 buf_len;
u32 num_channels;
const struct mhi_channel_config *ch_cfg;
@@ -326,6 +328,7 @@ struct mhi_controller_config {
* @pm_mutex: Mutex for suspend/resume operation
* @pm_lock: Lock for protecting MHI power management state
* @timeout_ms: Timeout in ms for state transitions
+ * @ready_timeout_ms: Timeout in ms for waiting device to be ready (optional)
* @pm_state: MHI power management state
* @db_access: DB access states
* @ee: MHI device execution environment
@@ -413,6 +416,7 @@ struct mhi_controller {
struct mutex pm_mutex;
rwlock_t pm_lock;
u32 timeout_ms;
+ u32 ready_timeout_ms;
u32 pm_state;
u32 db_access;
enum mhi_ee_type ee;
--
2.7.4
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