linux-kernel - Re: [PATCH] bus: mhi: pci_generic: Introduce Foxconn T99W175 support

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Date:   Wed, 7 Apr 2021 10:30:51 +0200
From:   Loic Poulain <loic.poulain@...aro.org>
To:     Jarvis Jiang <jarvis.w.jiang@...il.com>
Cc:     Manivannan Sadhasivam <mani@...nel.org>,
        Hemant Kumar <hemantk@...eaurora.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        cchen50@...ovo.com, mpearson@...ovo.com
Subject: Re: [PATCH] bus: mhi: pci_generic: Introduce Foxconn T99W175 support

Hi Jarvis,

On Wed, 7 Apr 2021 at 04:51, Jarvis Jiang <jarvis.w.jiang@...il.com> wrote:
>
> Add support for T99W175 modems, this modem series is based on SDX55
> qcom chip. The modem is mainly based on MBIM protocol for both the
> data and control path.
>
> This patch was tested with Ubuntu 20.04 X86_64 PC as host
>
> Signed-off-by: Jarvis Jiang <jarvis.w.jiang@...il.com>
> ---
>  drivers/bus/mhi/pci_generic.c | 58 +++++++++++++++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>
> diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
> index 5cf44bcfe040..3e396c65a758 100644
> --- a/drivers/bus/mhi/pci_generic.c
> +++ b/drivers/bus/mhi/pci_generic.c
> @@ -260,6 +260,52 @@ static const struct mhi_pci_dev_info mhi_quectel_em1xx_info = {
>         .dma_data_width = 32
>  };
>
> +static const struct mhi_channel_config mhi_foxconn_sdx55_channels[] = {
> +       MHI_CHANNEL_CONFIG_UL(0, "LOOPBACK", 32, 0),
> +       MHI_CHANNEL_CONFIG_DL(1, "LOOPBACK", 32, 0),
> +       MHI_CHANNEL_CONFIG_UL(4, "DIAG", 32, 1),
> +       MHI_CHANNEL_CONFIG_DL(5, "DIAG", 32, 1),
> +       MHI_CHANNEL_CONFIG_UL(12, "MBIM", 32, 0),
> +       MHI_CHANNEL_CONFIG_DL(13, "MBIM", 32, 0),
> +       MHI_CHANNEL_CONFIG_UL(14, "QMI", 32, 0),
> +       MHI_CHANNEL_CONFIG_DL(15, "QMI", 32, 0),
> +       MHI_CHANNEL_CONFIG_UL(16, "QMI1", 32, 0),
> +       MHI_CHANNEL_CONFIG_DL(17, "QMI1", 32, 0),

Are these QMI channels need to be exposed, vendors usually expose
either QMI+QMAP or MBIM (for data and control), here you expose
IP_HW0_MBIM as 'data' channel, so I would expect that MBIM is all you
need for the 'control' channel.

> +       MHI_CHANNEL_CONFIG_UL(18, "IP_CTRL", 32, 0),
> +       MHI_CHANNEL_CONFIG_DL(19, "IP_CTRL", 32, 0),
> +       MHI_CHANNEL_CONFIG_UL(20, "IPCR", 32, 0),
> +       MHI_CHANNEL_CONFIG_DL(21, "IPCR", 32, 0),
> +       MHI_CHANNEL_CONFIG_UL(32, "AT", 32, 0),
> +       MHI_CHANNEL_CONFIG_DL(33, "AT", 32, 0),
> +       MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0_MBIM", 128, 2),
> +       MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
> +};
> +
> +static struct mhi_event_config mhi_foxconn_sdx55_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, 1024, 101)
> +};
> +
> +static struct mhi_controller_config modem_foxconn_sdx55_config = {
> +       .max_channels = 128,
> +       .timeout_ms = 20000,
> +       .num_channels = ARRAY_SIZE(mhi_foxconn_sdx55_channels),
> +       .ch_cfg = mhi_foxconn_sdx55_channels,
> +       .num_events = ARRAY_SIZE(mhi_foxconn_sdx55_events),
> +       .event_cfg = mhi_foxconn_sdx55_events,
> +};
> +
> +static const struct mhi_pci_dev_info mhi_foxconn_sdx55_info = {
> +       .name = "foxconn-sdx55",
> +       .fw = "qcom/sdx55m/sbl1.mbn",
> +       .edl = "qcom/sdx55m/edl.mbn",
> +       .config = &modem_foxconn_sdx55_config,
> +       .bar_num = MHI_PCI_DEFAULT_BAR_NUM,
> +       .dma_data_width = 32
> +};
> +
>  static const struct pci_device_id mhi_pci_id_table[] = {
>         { PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0306),
>                 .driver_data = (kernel_ulong_t) &mhi_qcom_sdx55_info },
> @@ -269,6 +315,18 @@ static const struct pci_device_id mhi_pci_id_table[] = {
>                 .driver_data = (kernel_ulong_t) &mhi_quectel_em1xx_info },
>         { PCI_DEVICE(0x1eac, 0x1002), /* EM160R-GL (sdx24) */
>                 .driver_data = (kernel_ulong_t) &mhi_quectel_em1xx_info },
> +       { PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0ab), /* T99W175 (sdx55) */
> +               .driver_data = (kernel_ulong_t) &mhi_foxconn_sdx55_info },
> +       { PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0b2), /* T99W175 (sdx55) */
> +               .driver_data = (kernel_ulong_t) &mhi_foxconn_sdx55_info },
> +       { PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0b3), /* T99W175 (sdx55) */
> +               .driver_data = (kernel_ulong_t) &mhi_foxconn_sdx55_info },
> +       /* DW5930e (sdx55), With eSIM, It's also T99W175 */
> +       { PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0b0),
> +               .driver_data = (kernel_ulong_t) &mhi_foxconn_sdx55_info },
> +       /* DW5930e (sdx55), Non-eSIM, It's also T99W175 */
> +       { PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0b1),
> +               .driver_data = (kernel_ulong_t) &mhi_foxconn_sdx55_info },
>         {  }
>  };
>  MODULE_DEVICE_TABLE(pci, mhi_pci_id_table);
> --
> 2.25.1
>