bus: mhi: pci_generic: Add FIREHOSE channels

When device enters flash programmer context (FP), it exposes firehose
protocol through the EDL dedicated channels.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617784860-32439-1-git-send-email-loic.poulain@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
index f5992ec7eeb7f42a19aeb9edc8dca8a434707278..aa8f8d5413712a88825bbfe5adc26e006f2e6107 100644 (file)
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -145,6 +145,36 @@ struct mhi_pci_dev_info {
                .doorbell_mode_switch = false,          \
        }
 
+#define MHI_CHANNEL_CONFIG_UL_FP(ch_num, ch_name, el_count, ev_ring) \
+       {                                               \
+               .num = ch_num,                          \
+               .name = ch_name,                        \
+               .num_elements = el_count,               \
+               .event_ring = ev_ring,                  \
+               .dir = DMA_TO_DEVICE,                   \
+               .ee_mask = BIT(MHI_EE_FP),              \
+               .pollcfg = 0,                           \
+               .doorbell = MHI_DB_BRST_DISABLE,        \
+               .lpm_notify = false,                    \
+               .offload_channel = false,               \
+               .doorbell_mode_switch = false,          \
+       }                                               \
+
+#define MHI_CHANNEL_CONFIG_DL_FP(ch_num, ch_name, el_count, ev_ring) \
+       {                                               \
+               .num = ch_num,                          \
+               .name = ch_name,                        \
+               .num_elements = el_count,               \
+               .event_ring = ev_ring,                  \
+               .dir = DMA_FROM_DEVICE,                 \
+               .ee_mask = BIT(MHI_EE_FP),              \
+               .pollcfg = 0,                           \
+               .doorbell = MHI_DB_BRST_DISABLE,        \
+               .lpm_notify = false,                    \
+               .offload_channel = false,               \
+               .doorbell_mode_switch = false,          \
+       }
+
 #define MHI_EVENT_CONFIG_DATA(ev_ring, el_count) \
        {                                       \
                .num_elements = el_count,       \
@@ -181,6 +211,8 @@ static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
        MHI_CHANNEL_CONFIG_DL(15, "QMI", 4, 0),
        MHI_CHANNEL_CONFIG_UL(20, "IPCR", 8, 0),
        MHI_CHANNEL_CONFIG_DL(21, "IPCR", 8, 0),
+       MHI_CHANNEL_CONFIG_UL_FP(34, "FIREHOSE", 32, 0),
+       MHI_CHANNEL_CONFIG_DL_FP(35, "FIREHOSE", 32, 0),
        MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 128, 2),
        MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 3),
 };
@@ -241,6 +273,9 @@ static const struct mhi_channel_config mhi_quectel_em1xx_channels[] = {
        MHI_CHANNEL_CONFIG_DL(13, "MBIM", 32, 0),
        MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
        MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
+       /* The EDL firmware is a flash-programmer exposing firehose protocol */
+       MHI_CHANNEL_CONFIG_UL_FP(34, "FIREHOSE", 32, 0),
+       MHI_CHANNEL_CONFIG_DL_FP(35, "FIREHOSE", 32, 0),
        MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0_MBIM", 128, 2),
        MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
 };