Merge pull request #85 from grissiom/fix-usb-serial

Fix usb serial

components/drivers/usb/usbdevice/class/cdc_vcom.c

@@ -20,15 +20,24 @@
 
 #ifdef RT_USB_DEVICE_CDC
 
-#define CDC_RX_BUFSIZE          64
+#define CDC_RX_BUFSIZE          2048
 #define CDC_TX_BUFSIZE          2048
-static rt_uint8_t rx_pool[CDC_RX_BUFSIZE];
-static rt_uint8_t tx_pool[CDC_TX_BUFSIZE];
+static rt_uint8_t rx_rbp[CDC_RX_BUFSIZE];
+static rt_uint8_t tx_rbp[CDC_TX_BUFSIZE];
 static struct rt_ringbuffer rx_ringbuffer;
 static struct rt_ringbuffer tx_ringbuffer;
-static struct rt_serial_device vcom_serial;
 static struct serial_ringbuffer vcom_int_rx;
+
+static struct rt_serial_device vcom_serial;
+
+#define CDC_MaxPacketSize 64
+ALIGN(RT_ALIGN_SIZE)
+static rt_uint8_t rx_buf[CDC_RX_BUFSIZE];
+ALIGN(RT_ALIGN_SIZE)
+static rt_uint8_t tx_buf[CDC_TX_BUFSIZE];
+
 static rt_bool_t vcom_connected = RT_FALSE;
+static rt_bool_t vcom_in_sending = RT_FALSE;
 
 static struct udevice_descriptor dev_desc =
 {
@@ -38,7 +47,7 @@ static struct udevice_descriptor dev_desc =
     USB_CLASS_CDC,              //bDeviceClass;
     0x00,                       //bDeviceSubClass;
     0x00,                       //bDeviceProtocol;
-    0x40,                       //bMaxPacketSize0;
+    CDC_MaxPacketSize,          //bMaxPacketSize0;
     _VENDOR_ID,                 //idVendor;
     _PRODUCT_ID,                //idProduct;
     USB_BCD_DEVICE,             //bcdDevice;
@@ -153,25 +162,44 @@ const static char* _ustring[] =
 static rt_err_t _ep_in_handler(udevice_t device, uclass_t cls, rt_size_t size)
 {
     rt_uint32_t level;
-    rt_size_t length;
+    rt_uint32_t remain;
     cdc_eps_t eps;
-    rt_size_t mps;
 
     eps = (cdc_eps_t)cls->eps;
-    mps = eps->ep_in->ep_desc->wMaxPacketSize;
-    size = RT_RINGBUFFER_SIZE(&tx_ringbuffer);
-    if(size == 0) return RT_EOK;
-
-    length = size > mps ? mps : size;
-
     level = rt_hw_interrupt_disable();
-    rt_ringbuffer_get(&tx_ringbuffer, eps->ep_in->buffer, length);
+    remain = RT_RINGBUFFER_SIZE(&tx_ringbuffer);
+    if (remain != 0)
+    {
+
+        vcom_in_sending = RT_TRUE;
+        rt_ringbuffer_get(&tx_ringbuffer, eps->ep_in->buffer, remain);
         rt_hw_interrupt_enable(level);
 
         /* send data to host */
-    dcd_ep_write(device->dcd, eps->ep_in, eps->ep_in->buffer, length);
+        dcd_ep_write(device->dcd, eps->ep_in, eps->ep_in->buffer, remain);
+
+        return RT_EOK;
+    }
 
+    if (size != 0 &&
+        (size % CDC_MaxPacketSize) == 0)
+    {
+        /* don't have data right now. Send a zero-length-packet to
+         * terminate the transaction.
+         *
+         * FIXME: actually, this might not be the right place to send zlp.
+         * Only the rt_device_write could know how much data is sending. */
+        vcom_in_sending = RT_TRUE;
+        rt_hw_interrupt_enable(level);
+        dcd_ep_write(device->dcd, eps->ep_in, RT_NULL, 0);
         return RT_EOK;
+    }
+    else
+    {
+        vcom_in_sending = RT_FALSE;
+        rt_hw_interrupt_enable(level);
+        return RT_EOK;
+    }
 }
 
 /**
@@ -192,6 +220,7 @@ static rt_err_t _ep_out_handler(udevice_t device, uclass_t cls, rt_size_t size)
     eps = (cdc_eps_t)cls->eps;
     /* receive data from USB VCOM */
     level = rt_hw_interrupt_disable();
+
     rt_ringbuffer_put(&rx_ringbuffer, eps->ep_out->buffer, size);
     rt_hw_interrupt_enable(level);
 
@@ -337,8 +366,8 @@ static rt_err_t _class_run(udevice_t device, uclass_t cls)
     RT_DEBUG_LOG(RT_DEBUG_USB, ("cdc class run\n"));
     eps = (cdc_eps_t)cls->eps;
 
-    eps->ep_in->buffer=tx_pool;
-    eps->ep_out->buffer=rx_pool;
+    eps->ep_in->buffer = tx_buf;
+    eps->ep_out->buffer = rx_buf;
 
     dcd_ep_read(device->dcd, eps->ep_out, eps->ep_out->buffer,
                 eps->ep_out->ep_desc->wMaxPacketSize);
@@ -373,31 +402,27 @@ static rt_err_t _class_sof_handler(udevice_t device, uclass_t cls)
 {
     rt_uint32_t level;
     rt_size_t size;
-    static rt_uint32_t frame_count = 0;
     cdc_eps_t eps;
 
-    if(vcom_connected != RT_TRUE) return -RT_ERROR;
+    if (vcom_connected != RT_TRUE)
+        return -RT_ERROR;
 
-    eps = (cdc_eps_t)cls->eps;
-    if (frame_count ++ == 5)
-    {
-        rt_size_t mps = eps->ep_in->ep_desc->wMaxPacketSize;
+    if (vcom_in_sending)
+        return RT_EOK;
 
-        /* reset the frame counter */
-        frame_count = 0;
+    eps = (cdc_eps_t)cls->eps;
 
     size = RT_RINGBUFFER_SIZE(&tx_ringbuffer);
-        if(size == 0) return -RT_EFULL;
-
-        size = size > mps ? mps : size;
+    if (size == 0)
+        return -RT_EFULL;
 
     level = rt_hw_interrupt_disable();
     rt_ringbuffer_get(&tx_ringbuffer, eps->ep_in->buffer, size);
     rt_hw_interrupt_enable(level);
 
     /* send data to host */
+    vcom_in_sending = RT_TRUE;
     dcd_ep_write(device->dcd, eps->ep_in, eps->ep_in->buffer, size);
-    }
 
     return RT_EOK;
 }
@@ -534,8 +559,24 @@ static rt_err_t _vcom_control(struct rt_serial_device *serial,
 static int _vcom_putc(struct rt_serial_device *serial, char c)
 {
     rt_uint32_t level;
+    int cnt = 500;
+
+    if (vcom_connected != RT_TRUE)
+        return 0;
 
-    if (vcom_connected != RT_TRUE) return 0;
+    /* if the buffer is full, there is a chance that the host would pull some
+     * data out soon. But we cannot rely on that and if we wait to long, just
+     * return. */
+    for (cnt = 500;
+         RT_RINGBUFFER_EMPTY(&tx_ringbuffer) == 0 && cnt;
+         cnt--)
+    {
+        rt_kprintf("wait for %d\n", cnt);
+        if (vcom_connected != RT_TRUE)
+            return 0;
+    }
+    if (cnt == 0)
+        return 0;
 
     level = rt_hw_interrupt_disable();
     if (RT_RINGBUFFER_EMPTY(&tx_ringbuffer))
@@ -579,8 +620,8 @@ void rt_usb_vcom_init(void)
     struct serial_configure config;
 
     /* initialize ring buffer */
-    rt_ringbuffer_init(&rx_ringbuffer, rx_pool, CDC_RX_BUFSIZE);
-    rt_ringbuffer_init(&tx_ringbuffer, tx_pool, CDC_TX_BUFSIZE);
+    rt_ringbuffer_init(&rx_ringbuffer, rx_rbp, CDC_RX_BUFSIZE);
+    rt_ringbuffer_init(&tx_ringbuffer, tx_rbp, CDC_TX_BUFSIZE);
 
     config.baud_rate = BAUD_RATE_115200;
     config.bit_order = BIT_ORDER_LSB;
@@ -595,7 +636,7 @@ void rt_usb_vcom_init(void)
 
     /* register vcom device */
     rt_hw_serial_register(&vcom_serial, "vcom",
-                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
                           RT_NULL);
 }
 

components/drivers/usb/usbdevice/core/core.c

@@ -1294,39 +1294,35 @@ static void rt_usbd_thread_entry(void* parameter)
         uep_t ep;
 
         /* receive message */
-        if(rt_mq_recv(usb_mq, &msg, sizeof(struct udev_msg), RT_WAITING_FOREVER)
-                != RT_EOK ) continue;
+        if(rt_mq_recv(usb_mq,
+                    &msg, sizeof(struct udev_msg),
+                    RT_WAITING_FOREVER) != RT_EOK )
+            continue;
 
-        switch (msg.type)
-        {
-        case USB_MSG_SETUP_NOTIFY:
-            device = rt_usbd_find_device(msg.dcd);
-            if(device != RT_NULL)
-                _setup_request(device, (ureq_t)msg.content.setup_msg.packet);
-            else
-                rt_kprintf("invalid usb device\n");
-            break;
-        case USB_MSG_DATA_NOTIFY:
         device = rt_usbd_find_device(msg.dcd);
         if(device == RT_NULL)
         {
             rt_kprintf("invalid usb device\n");
-                break;
+            continue;
         }
+
+        switch (msg.type)
+        {
+        case USB_MSG_SOF:
+            _sof_notify(device);
+            break;
+        case USB_MSG_DATA_NOTIFY:
             ep = rt_usbd_find_endpoint(device, &cls, msg.content.ep_msg.ep_addr);
             if(ep != RT_NULL)
                 ep->handler(device, cls, msg.content.ep_msg.size);
             else
                 rt_kprintf("invalid endpoint\n");
             break;
-        case USB_MSG_SOF:
-            device = rt_usbd_find_device(msg.dcd);
-            if(device != RT_NULL)
-                _sof_notify(device);
-            else
-                rt_kprintf("invalid usb device\n");
+        case USB_MSG_SETUP_NOTIFY:
+            _setup_request(device, (ureq_t)msg.content.setup_msg.packet);
             break;
         default:
+            rt_kprintf("unknown msg type\n");
             break;
         }
     }