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   1 From 789d3eeb2367f92193a0882f7cdab03f0f9d6930 Mon Sep 17 00:00:00 2001
   2 From: Thomas Perrot <thomas.perrot@bootlin.com>
   3 Date: Thu, 16 Dec 2021 13:42:27 +0530
   4 Subject: [PATCH] bus: mhi: pci_generic: Introduce Sierra EM919X support
   5
   6 Add support for EM919X modems, this modem series is based on SDX55
   7 qcom chip.
   8
   9 It is mandatory to use the same ring for control+data and diag events.
  10
  11 Link: https://lore.kernel.org/r/20211123081541.648426-1-thomas.perrot@bootlin.com
  12 Tested-by: Aleksander Morgado <aleksander@aleksander.es>
  13 Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
  14 Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
  15 Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
  16 Link: https://lore.kernel.org/r/20211216081227.237749-11-manivannan.sadhasivam@linaro.org
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18 ---
  19  drivers/bus/mhi/pci_generic.c | 43 +++++++++++++++++++++++++++++++++++
  20  1 file changed, 43 insertions(+)
  21
  22 --- a/drivers/bus/mhi/pci_generic.c
  23 +++ b/drivers/bus/mhi/pci_generic.c
  24 @@ -406,6 +406,46 @@ static const struct mhi_pci_dev_info mhi
  25         .mru_default = 32768,
  26  };
  27
  28 +static const struct mhi_channel_config mhi_sierra_em919x_channels[] = {
  29 +       MHI_CHANNEL_CONFIG_UL_SBL(2, "SAHARA", 32, 0),
  30 +       MHI_CHANNEL_CONFIG_DL_SBL(3, "SAHARA", 256, 0),
  31 +       MHI_CHANNEL_CONFIG_UL(4, "DIAG", 32, 0),
  32 +       MHI_CHANNEL_CONFIG_DL(5, "DIAG", 32, 0),
  33 +       MHI_CHANNEL_CONFIG_UL(12, "MBIM", 128, 0),
  34 +       MHI_CHANNEL_CONFIG_DL(13, "MBIM", 128, 0),
  35 +       MHI_CHANNEL_CONFIG_UL(14, "QMI", 32, 0),
  36 +       MHI_CHANNEL_CONFIG_DL(15, "QMI", 32, 0),
  37 +       MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
  38 +       MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
  39 +       MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 512, 1),
  40 +       MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 512, 2),
  41 +};
  42 +
  43 +static struct mhi_event_config modem_sierra_em919x_mhi_events[] = {
  44 +       /* first ring is control+data and DIAG ring */
  45 +       MHI_EVENT_CONFIG_CTRL(0, 2048),
  46 +       /* Hardware channels request dedicated hardware event rings */
  47 +       MHI_EVENT_CONFIG_HW_DATA(1, 2048, 100),
  48 +       MHI_EVENT_CONFIG_HW_DATA(2, 2048, 101)
  49 +};
  50 +
  51 +static const struct mhi_controller_config modem_sierra_em919x_config = {
  52 +       .max_channels = 128,
  53 +       .timeout_ms = 24000,
  54 +       .num_channels = ARRAY_SIZE(mhi_sierra_em919x_channels),
  55 +       .ch_cfg = mhi_sierra_em919x_channels,
  56 +       .num_events = ARRAY_SIZE(modem_sierra_em919x_mhi_events),
  57 +       .event_cfg = modem_sierra_em919x_mhi_events,
  58 +};
  59 +
  60 +static const struct mhi_pci_dev_info mhi_sierra_em919x_info = {
  61 +       .name = "sierra-em919x",
  62 +       .config = &modem_sierra_em919x_config,
  63 +       .bar_num = MHI_PCI_DEFAULT_BAR_NUM,
  64 +       .dma_data_width = 32,
  65 +       .sideband_wake = false,
  66 +};
  67 +
  68  static const struct mhi_channel_config mhi_telit_fn980_hw_v1_channels[] = {
  69         MHI_CHANNEL_CONFIG_UL(14, "QMI", 32, 0),
  70         MHI_CHANNEL_CONFIG_DL(15, "QMI", 32, 0),
  71 @@ -480,6 +520,9 @@ static const struct mhi_pci_dev_info mhi
  72  };
  73
  74  static const struct pci_device_id mhi_pci_id_table[] = {
  75 +       /* EM919x (sdx55), use the same vid:pid as qcom-sdx55m */
  76 +       { PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, 0x18d7, 0x0200),
  77 +               .driver_data = (kernel_ulong_t) &mhi_sierra_em919x_info },
  78         /* Telit FN980 hardware revision v1 */
  79         { PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, 0x1C5D, 0x2000),
  80                 .driver_data = (kernel_ulong_t) &mhi_telit_fn980_hw_v1_info },