[PATCH v2 1/1] bus: mhi: pci_generic: add Rolling Wireless RW135R-GL and RW151 support

From: <hidden>
Date: 2026-06-05 09:58:22
Also in: linux-arm-msm

From: Wanquan Zhong <redacted>

bus: mhi: pci_generic: add Rolling Wireless RW135R-GL and RW151 support

Add MHI PCIe device configuration for Rolling Wireless modules:

- RW135R-GL (Qualcomm sdx35): MBIM, DIAG, DUN, NMEA, FIREHOSE, ADB, IP_HW0
- RW151 (Qualcomm sdx75): same channel layout with adjusted ring sizes

Register PCI_DEVICE_SUB entries per chipset:
- RW135R-GL on QCOM 0x011a (sdx35): sub-vendor 0x2099,
  sub-device 0x1300/0x1301
- RW151 on QCOM 0x0309 (sdx75): sub-vendor 0x2099, sub-device 0x1500;
  sub-vendor 0x103c, sub-device 0x8fb8/0x8fb4

Use Rolling-specific EDL firmware paths under qcom/sdx35/rolling/ and
qcom/sdx75/rolling/.

Enable the ADB MHI channel in mhi_wwan_ctrl so userspace can access the
WWAN_PORT_ADB port via the wwan subsystem.

Tested suspend-to-RAM (mem) on Rolling RW135R-GL and RW151 hardware: MHI
resumes cleanly and MBIM/wwan function after wake. Hibernate (disk) could
not be tested on this platform (/sys/power/state lacks "disk", ENODEV).

Tested-on: Rolling RW135R-GL hardware (MHI probe, MBIM, DIAG, ADB,
suspend-to-RAM)
Tested-on: Rolling RW151 hardware (MHI probe, MBIM, DIAG, ADB,
suspend-to-RAM)

Signed-off-by: Wanquan Zhong <redacted>

---
v1 -> v2: Correct Rolling EDL firmware paths; fix RW151 PCI subsystem IDs;
         document suspend-to-RAM testing (hibernate N/A on test platform)
 drivers/bus/mhi/host/pci_generic.c | 103 +++++++++++++++++++++++++++++
 drivers/net/wwan/mhi_wwan_ctrl.c   |   1 +
 2 files changed, 104 insertions(+)

diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index 0884a384b77f..d598bb3b3981 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c

@@ -902,6 +902,94 @@ static const struct mhi_pci_dev_info mhi_netprisma_fcun69_info = {
 	.sideband_wake = true,
 };
 
+static const struct mhi_channel_config mhi_rolling_rw135r_channels[] = {
+	MHI_CHANNEL_CONFIG_UL(4, "DIAG", 64, 1),
+	MHI_CHANNEL_CONFIG_DL(5, "DIAG", 64, 1),
+	MHI_CHANNEL_CONFIG_UL(12, "MBIM", 32, 0),
+	MHI_CHANNEL_CONFIG_DL(13, "MBIM", 32, 0),
+	MHI_CHANNEL_CONFIG_UL(14, "NMEA", 32, 0),
+	MHI_CHANNEL_CONFIG_DL(15, "NMEA", 32, 0),
+	MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
+	MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
+	MHI_CHANNEL_CONFIG_UL_FP(34, "FIREHOSE", 32, 0),
+	MHI_CHANNEL_CONFIG_DL_FP(35, "FIREHOSE", 32, 0),
+	MHI_CHANNEL_CONFIG_UL(36, "ADB", 32, 0),
+	MHI_CHANNEL_CONFIG_DL(37, "ADB", 32, 0),
+	MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 128, 2),
+	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 3),
+};
+
+static struct mhi_event_config mhi_rolling_rw135r_events[] = {
+	MHI_EVENT_CONFIG_CTRL(0, 128),
+	MHI_EVENT_CONFIG_DATA(1, 128),
+	MHI_EVENT_CONFIG_HW_DATA(2, 1024, 100),
+	MHI_EVENT_CONFIG_HW_DATA(3, 2048, 101),
+};
+
+static const struct mhi_controller_config modem_rolling_rw135r_config = {
+	.max_channels = 128,
+	.timeout_ms = 8000,
+	.num_channels = ARRAY_SIZE(mhi_rolling_rw135r_channels),
+	.ch_cfg = mhi_rolling_rw135r_channels,
+	.num_events = ARRAY_SIZE(mhi_rolling_rw135r_events),
+	.event_cfg = mhi_rolling_rw135r_events,
+};
+
+static const struct mhi_pci_dev_info mhi_rolling_rw135r_info = {
+	.edl = "qcom/sdx35/rolling/prog_firehose_ddr.elf",
+	.name = "rolling-rw135r",
+	.config = &modem_rolling_rw135r_config,
+	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
+	.dma_data_width = 32,
+	.sideband_wake = false,
+	.mru_default = 32768,
+	.edl_trigger = true,
+};
+
+static const struct mhi_channel_config mhi_rolling_rw151_channels[] = {
+	MHI_CHANNEL_CONFIG_UL(4, "DIAG", 16, 1),
+	MHI_CHANNEL_CONFIG_DL(5, "DIAG", 16, 1),
+	MHI_CHANNEL_CONFIG_UL(12, "MBIM", 4, 0),
+	MHI_CHANNEL_CONFIG_DL(13, "MBIM", 4, 0),
+	MHI_CHANNEL_CONFIG_UL(14, "NMEA", 32, 0),
+	MHI_CHANNEL_CONFIG_DL(15, "NMEA", 32, 0),
+	MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
+	MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
+	MHI_CHANNEL_CONFIG_UL_FP(34, "FIREHOSE", 32, 0),
+	MHI_CHANNEL_CONFIG_DL_FP(35, "FIREHOSE", 32, 0),
+	MHI_CHANNEL_CONFIG_UL(36, "ADB", 32, 0),
+	MHI_CHANNEL_CONFIG_DL(37, "ADB", 32, 0),
+	MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 128, 2),
+	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 3),
+};
+
+static struct mhi_event_config mhi_rolling_rw151_events[] = {
+	MHI_EVENT_CONFIG_CTRL(0, 128),
+	MHI_EVENT_CONFIG_DATA(1, 128),
+	MHI_EVENT_CONFIG_HW_DATA(2, 1024, 100),
+	MHI_EVENT_CONFIG_HW_DATA(3, 2048, 101),
+};
+
+static const struct mhi_controller_config modem_rolling_rw151_config = {
+	.max_channels = 128,
+	.timeout_ms = 50000,
+	.num_channels = ARRAY_SIZE(mhi_rolling_rw151_channels),
+	.ch_cfg = mhi_rolling_rw151_channels,
+	.num_events = ARRAY_SIZE(mhi_rolling_rw151_events),
+	.event_cfg = mhi_rolling_rw151_events,
+};
+
+static const struct mhi_pci_dev_info mhi_rolling_rw151_info = {
+	.edl = "qcom/sdx75/rolling/prog_firehose_lite.elf",
+	.name = "rolling-rw151",
+	.config = &modem_rolling_rw151_config,
+	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
+	.dma_data_width = 32,
+	.sideband_wake = false,
+	.mru_default = 32768,
+	.edl_trigger = true,
+};
+
 /* Keep the list sorted based on the PID. New VID should be added as the last entry */
 static const struct pci_device_id mhi_pci_id_table[] = {
 	{PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0116),

@@ -909,6 +997,12 @@ static const struct pci_device_id mhi_pci_id_table[] = {
 	/* Telit FN920C04 (sdx35) */
 	{PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x011a, 0x1c5d, 0x2020),
 		.driver_data = (kernel_ulong_t) &mhi_telit_fn920c04_info },
+	/* Rolling RW135R-GL (sdx35) */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x011a, 0x2099, 0x1300),
+		.driver_data = (kernel_ulong_t) &mhi_rolling_rw135r_info },
+	/* Rolling RW135R-GL (sdx35) */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x011a, 0x2099, 0x1301),
+		.driver_data = (kernel_ulong_t) &mhi_rolling_rw135r_info },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0304),
 		.driver_data = (kernel_ulong_t) &mhi_qcom_sdx24_info },
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, PCI_VENDOR_ID_QCOM, 0x010c),

@@ -941,6 +1035,15 @@ static const struct pci_device_id mhi_pci_id_table[] = {
 	/* Telit FE990B40 (sdx72) */
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0309, 0x1c5d, 0x2025),
 		.driver_data = (kernel_ulong_t) &mhi_telit_fe990b40_info },
+	/* Rolling RW151 (sdx75) */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0309, 0x2099, 0x1500),
+		.driver_data = (kernel_ulong_t) &mhi_rolling_rw151_info },
+	/* Rolling RW151 (sdx75) */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0309, 0x103c, 0x8fb8),
+		.driver_data = (kernel_ulong_t) &mhi_rolling_rw151_info },
+	/* Rolling RW151 (sdx75) */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0309, 0x103c, 0x8fb4),
+		.driver_data = (kernel_ulong_t) &mhi_rolling_rw151_info },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0309),
 		.driver_data = (kernel_ulong_t) &mhi_qcom_sdx75_info },
 	/* QDU100, x100-DU */

diff --git a/drivers/net/wwan/mhi_wwan_ctrl.c b/drivers/net/wwan/mhi_wwan_ctrl.c
index fa73861db6ad..c0bba94d5c3f 100644
--- a/drivers/net/wwan/mhi_wwan_ctrl.c
+++ b/drivers/net/wwan/mhi_wwan_ctrl.c

@@ -264,6 +264,7 @@ static const struct mhi_device_id mhi_wwan_ctrl_match_table[] = {
 	{ .chan = "DIAG", .driver_data = WWAN_PORT_QCDM },
 	{ .chan = "FIREHOSE", .driver_data = WWAN_PORT_FIREHOSE },
 	{ .chan = "NMEA", .driver_data = WWAN_PORT_NMEA },
+	{ .chan = "ADB", .driver_data = WWAN_PORT_ADB },
 	{},
 };
 MODULE_DEVICE_TABLE(mhi, mhi_wwan_ctrl_match_table);

--

2.50.0

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