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Subject[PATCH 10/10] bus: mhi: pci_generic: Introduce Sierra EM919X support
Date
From: Thomas Perrot <thomas.perrot@bootlin.com>

Add support for EM919X modems, this modem series is based on SDX55
qcom chip.

It is mandatory to use the same ring for control+data and diag events.

Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Tested-by: Aleksander Morgado <aleksander@aleksander.es>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://lore.kernel.org/r/20211123081541.648426-1-thomas.perrot@bootlin.com
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/bus/mhi/pci_generic.c | 43 +++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)

diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
index 9ef41354237c..29607f7bc8da 100644
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -403,7 +403,50 @@ static const struct mhi_pci_dev_info mhi_mv31_info = {
.dma_data_width = 32,
};

+static const struct mhi_channel_config mhi_sierra_em919x_channels[] = {
+ MHI_CHANNEL_CONFIG_UL_SBL(2, "SAHARA", 32, 0),
+ MHI_CHANNEL_CONFIG_DL_SBL(3, "SAHARA", 256, 0),
+ MHI_CHANNEL_CONFIG_UL(4, "DIAG", 32, 0),
+ MHI_CHANNEL_CONFIG_DL(5, "DIAG", 32, 0),
+ MHI_CHANNEL_CONFIG_UL(12, "MBIM", 128, 0),
+ MHI_CHANNEL_CONFIG_DL(13, "MBIM", 128, 0),
+ MHI_CHANNEL_CONFIG_UL(14, "QMI", 32, 0),
+ MHI_CHANNEL_CONFIG_DL(15, "QMI", 32, 0),
+ MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
+ MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
+ MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 512, 1),
+ MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 512, 2),
+};
+
+static struct mhi_event_config modem_sierra_em919x_mhi_events[] = {
+ /* first ring is control+data and DIAG ring */
+ MHI_EVENT_CONFIG_CTRL(0, 2048),
+ /* Hardware channels request dedicated hardware event rings */
+ MHI_EVENT_CONFIG_HW_DATA(1, 2048, 100),
+ MHI_EVENT_CONFIG_HW_DATA(2, 2048, 101)
+};
+
+static const struct mhi_controller_config modem_sierra_em919x_config = {
+ .max_channels = 128,
+ .timeout_ms = 24000,
+ .num_channels = ARRAY_SIZE(mhi_sierra_em919x_channels),
+ .ch_cfg = mhi_sierra_em919x_channels,
+ .num_events = ARRAY_SIZE(modem_sierra_em919x_mhi_events),
+ .event_cfg = modem_sierra_em919x_mhi_events,
+};
+
+static const struct mhi_pci_dev_info mhi_sierra_em919x_info = {
+ .name = "sierra-em919x",
+ .config = &modem_sierra_em919x_config,
+ .bar_num = MHI_PCI_DEFAULT_BAR_NUM,
+ .dma_data_width = 32,
+ .sideband_wake = false,
+};
+
static const struct pci_device_id mhi_pci_id_table[] = {
+ /* EM919x (sdx55), use the same vid:pid as qcom-sdx55m */
+ { PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, 0x18d7, 0x0200),
+ .driver_data = (kernel_ulong_t) &mhi_sierra_em919x_info },
{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0306),
.driver_data = (kernel_ulong_t) &mhi_qcom_sdx55_info },
{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0304),
--
2.25.1
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