mt76: add multiple regs read support to usb_mcu layer

Introduce multiple regs read support to mcu layer in mt76-usb module.
Multiple regs read will be reused by mt76x0 driver in usb mcu layer
unification between mt76x0 and mt76x2u drivers

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index f84f35c..e9e4661 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -312,6 +312,12 @@ struct mt76_usb {
                struct completion cmpl;
                struct mt76u_buf res;
                u32 msg_seq;
+
+               /* multiple reads */
+               struct mt76_reg_pair *rp;
+               int rp_len;
+               u32 base;
+               bool burst;
        } mcu;
 };
 

diff --git a/drivers/net/wireless/mediatek/mt76/usb_mcu.c b/drivers/net/wireless/mediatek/mt76/usb_mcu.c
index 1edc5c3..d80dbfa 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/usb_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/usb_mcu.c
@@ -49,12 +49,44 @@ void mt76u_mcu_complete_urb(struct urb *urb)
 }
 EXPORT_SYMBOL_GPL(mt76u_mcu_complete_urb);
 
+static void
+mt76u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data,
+                        int len)
+{
+       struct mt76_usb *usb = &dev->usb;
+       u32 reg, val;
+       int i;
+
+       if (usb->mcu.burst) {
+               WARN_ON_ONCE(len / 4 != usb->mcu.rp_len);
+
+               reg = usb->mcu.rp[0].reg - usb->mcu.base;
+               for (i = 0; i < usb->mcu.rp_len; i++) {
+                       val = get_unaligned_le32(data + 4 * i);
+                       usb->mcu.rp[i].reg = reg++;
+                       usb->mcu.rp[i].value = val;
+               }
+       } else {
+               WARN_ON_ONCE(len / 8 != usb->mcu.rp_len);
+
+               for (i = 0; i < usb->mcu.rp_len; i++) {
+                       reg = get_unaligned_le32(data + 8 * i) -
+                             usb->mcu.base;
+                       val = get_unaligned_le32(data + 8 * i + 4);
+
+                       WARN_ON_ONCE(usb->mcu.rp[i].reg != reg);
+                       usb->mcu.rp[i].value = val;
+               }
+       }
+}
+
 static int mt76u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)
 {
        struct mt76_usb *usb = &dev->usb;
        struct mt76u_buf *buf = &usb->mcu.res;
        int i, ret;
        u32 rxfce;
+       u8 *data;
 
        for (i = 0; i < 5; i++) {
                if (!wait_for_completion_timeout(&usb->mcu.cmpl,
@@ -64,7 +96,12 @@ static int mt76u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)
                if (buf->urb->status)
                        return -EIO;
 
-               rxfce = get_unaligned_le32(sg_virt(&buf->urb->sg[0]));
+               data = sg_virt(&buf->urb->sg[0]);
+               if (usb->mcu.rp)
+                       mt76u_multiple_mcu_reads(dev, data + 4,
+                                                buf->urb->actual_length - 8);
+
+               rxfce = get_unaligned_le32(data);
                ret = mt76u_submit_buf(dev, USB_DIR_IN,
                                       MT_EP_IN_CMD_RESP,
                                       buf, GFP_KERNEL,