USB tablet support (Brad Campbell, Anthony Liguori)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1810 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 205 insertions, 15 deletions

diff --git a/hw/usb-hid.c b/hw/usb-hid.c
index 6f9ee82..17160eb 100644
--- a/hw/usb-hid.c
+++ b/hw/usb-hid.c
@@ -30,9 +30,15 @@
 #define SET_IDLE     0x210a
 #define SET_PROTOCOL 0x210b
 
+#define USB_MOUSE  1
+#define USB_TABLET 2
+
 typedef struct USBMouseState {
     USBDevice dev;
     int dx, dy, dz, buttons_state;
+    int x, y;
+    int kind;
+    int mouse_grabbed;
 } USBMouseState;
 
 /* mostly the same values as the Bochs USB Mouse device */
@@ -93,6 +99,15 @@ static const uint8_t qemu_mouse_config_descriptor[] = {
 	0x02,       /*  u8  if_bInterfaceProtocol; [usb1.1 or single tt] */
 	0x05,       /*  u8  if_iInterface; */
      
+        /* HID descriptor */
+        0x09,        /*  u8  bLength; */
+        0x21,        /*  u8 bDescriptorType; */
+        0x01, 0x00,  /*  u16 HID_class */
+        0x00,        /*  u8 country_code */
+        0x01,        /*  u8 num_descriptors */
+        0x22,        /*  u8 type; Report */
+        50, 0,       /*  u16 len */
+
 	/* one endpoint (status change endpoint) */
 	0x07,       /*  u8  ep_bLength; */
 	0x05,       /*  u8  ep_bDescriptorType; Endpoint */
@@ -100,6 +115,44 @@ static const uint8_t qemu_mouse_config_descriptor[] = {
  	0x03,       /*  u8  ep_bmAttributes; Interrupt */
  	0x03, 0x00, /*  u16 ep_wMaxPacketSize; */
 	0x0a,       /*  u8  ep_bInterval; (255ms -- usb 2.0 spec) */
+};
+
+static const uint8_t qemu_tablet_config_descriptor[] = {
+	/* one configuration */
+	0x09,       /*  u8  bLength; */
+	0x02,       /*  u8  bDescriptorType; Configuration */
+	0x22, 0x00, /*  u16 wTotalLength; */
+	0x01,       /*  u8  bNumInterfaces; (1) */
+	0x01,       /*  u8  bConfigurationValue; */
+	0x04,       /*  u8  iConfiguration; */
+	0xa0,       /*  u8  bmAttributes; 
+				 Bit 7: must be set,
+				     6: Self-powered,
+				     5: Remote wakeup,
+				     4..0: resvd */
+	50,         /*  u8  MaxPower; */
+      
+	/* USB 1.1:
+	 * USB 2.0, single TT organization (mandatory):
+	 *	one interface, protocol 0
+	 *
+	 * USB 2.0, multiple TT organization (optional):
+	 *	two interfaces, protocols 1 (like single TT)
+	 *	and 2 (multiple TT mode) ... config is
+	 *	sometimes settable
+	 *	NOT IMPLEMENTED
+	 */
+
+	/* one interface */
+	0x09,       /*  u8  if_bLength; */
+	0x04,       /*  u8  if_bDescriptorType; Interface */
+	0x00,       /*  u8  if_bInterfaceNumber; */
+	0x00,       /*  u8  if_bAlternateSetting; */
+	0x01,       /*  u8  if_bNumEndpoints; */
+	0x03,       /*  u8  if_bInterfaceClass; */
+	0x01,       /*  u8  if_bInterfaceSubClass; */
+	0x02,       /*  u8  if_bInterfaceProtocol; [usb1.1 or single tt] */
+	0x05,       /*  u8  if_iInterface; */
 
         /* HID descriptor */
         0x09,        /*  u8  bLength; */
@@ -108,7 +161,15 @@ static const uint8_t qemu_mouse_config_descriptor[] = {
         0x00,        /*  u8 country_code */
         0x01,        /*  u8 num_descriptors */
         0x22,        /*  u8 type; Report */
-        50, 0,       /*  u16 len */
+        74, 0,       /*  u16 len */
+
+	/* one endpoint (status change endpoint) */
+	0x07,       /*  u8  ep_bLength; */
+	0x05,       /*  u8  ep_bDescriptorType; Endpoint */
+	0x81,       /*  u8  ep_bEndpointAddress; IN Endpoint 1 */
+ 	0x03,       /*  u8  ep_bmAttributes; Interrupt */
+ 	0x08, 0x00, /*  u16 ep_wMaxPacketSize; */
+	0x03,       /*  u8  ep_bInterval; (255ms -- usb 2.0 spec) */
 };
 
 static const uint8_t qemu_mouse_hid_report_descriptor[] = {
@@ -121,6 +182,46 @@ static const uint8_t qemu_mouse_hid_report_descriptor[] = {
     0xC0, 0xC0,
 };
 
+static const uint8_t qemu_tablet_hid_report_descriptor[] = {
+        0x05, 0x01, /* Usage Page Generic Desktop */
+        0x09, 0x01, /* Usage Mouse */
+        0xA1, 0x01, /* Collection Application */
+        0x09, 0x01, /* Usage Pointer */
+        0xA1, 0x00, /* Collection Physical */
+        0x05, 0x09, /* Usage Page Button */
+        0x19, 0x01, /* Usage Minimum Button 1 */
+        0x29, 0x03, /* Usage Maximum Button 3 */
+        0x15, 0x00, /* Logical Minimum 0 */
+        0x25, 0x01, /* Logical Maximum 1 */
+        0x95, 0x03, /* Report Count 3 */
+        0x75, 0x01, /* Report Size 1 */
+        0x81, 0x02, /* Input (Data, Var, Abs) */
+        0x95, 0x01, /* Report Count 1 */
+        0x75, 0x05, /* Report Size 5 */
+        0x81, 0x01, /* Input (Cnst, Var, Abs) */
+        0x05, 0x01, /* Usage Page Generic Desktop */
+        0x09, 0x30, /* Usage X */
+        0x09, 0x31, /* Usage Y */
+        0x15, 0x00, /* Logical Minimum 0 */
+        0x26, 0xFF, 0x7F, /* Logical Maximum 0x7fff */
+        0x35, 0x00, /* Physical Minimum 0 */
+        0x46, 0xFE, 0x7F, /* Physical Maximum 0x7fff */
+        0x75, 0x10, /* Report Size 16 */
+        0x95, 0x02, /* Report Count 2 */
+        0x81, 0x02, /* Input (Data, Var, Abs) */
+        0x05, 0x01, /* Usage Page Generic Desktop */
+        0x09, 0x38, /* Usage Wheel */
+        0x15, 0x81, /* Logical Minimum -127 */
+        0x25, 0x7F, /* Logical Maximum 127 */
+        0x35, 0x00, /* Physical Minimum 0 (same as logical) */
+        0x45, 0x00, /* Physical Maximum 0 (same as logical) */
+        0x75, 0x08, /* Report Size 8 */
+        0x95, 0x01, /* Report Count 1 */
+        0x81, 0x02, /* Input (Data, Var, Rel) */
+        0xC0,       /* End Collection */
+        0xC0,       /* End Collection */
+};
+
 static void usb_mouse_event(void *opaque,
                             int dx1, int dy1, int dz1, int buttons_state)
 {
@@ -132,6 +233,17 @@ static void usb_mouse_event(void *opaque,
     s->buttons_state = buttons_state;
 }
 
+static void usb_tablet_event(void *opaque,
+			     int x, int y, int dz, int buttons_state)
+{
+    USBMouseState *s = opaque;
+
+    s->x = x;
+    s->y = y;
+    s->dz += dz;
+    s->buttons_state = buttons_state;
+}
+
 static inline int int_clamp(int val, int vmin, int vmax)
 {
     if (val < vmin)
@@ -146,6 +258,11 @@ static int usb_mouse_poll(USBMouseState *s, uint8_t *buf, int len)
 {
     int dx, dy, dz, b, l;
 
+    if (!s->mouse_grabbed) {
+	qemu_add_mouse_event_handler(usb_mouse_event, s, 0);
+	s->mouse_grabbed = 1;
+    }
+    
     dx = int_clamp(s->dx, -128, 127);
     dy = int_clamp(s->dy, -128, 127);
     dz = int_clamp(s->dz, -128, 127);
@@ -173,6 +290,39 @@ static int usb_mouse_poll(USBMouseState *s, uint8_t *buf, int len)
     return l;
 }
 
+static int usb_tablet_poll(USBMouseState *s, uint8_t *buf, int len)
+{
+    int dz, b, l;
+
+    if (!s->mouse_grabbed) {
+	qemu_add_mouse_event_handler(usb_tablet_event, s, 1);
+	s->mouse_grabbed = 1;
+    }
+    
+    dz = int_clamp(s->dz, -128, 127);
+    s->dz -= dz;
+
+    /* Appears we have to invert the wheel direction */
+    dz = 0 - dz;
+    b = 0;
+    if (s->buttons_state & MOUSE_EVENT_LBUTTON)
+        b |= 0x01;
+    if (s->buttons_state & MOUSE_EVENT_RBUTTON)
+        b |= 0x02;
+    if (s->buttons_state & MOUSE_EVENT_MBUTTON)
+        b |= 0x04;
+
+    buf[0] = b;
+    buf[1] = s->x & 0xff;
+    buf[2] = s->x >> 8;
+    buf[3] = s->y & 0xff;
+    buf[4] = s->y >> 8;
+    buf[5] = dz;
+    l = 6;
+
+    return l;
+}
+
 static void usb_mouse_handle_reset(USBDevice *dev)
 {
     USBMouseState *s = (USBMouseState *)dev;
@@ -180,6 +330,8 @@ static void usb_mouse_handle_reset(USBDevice *dev)
     s->dx = 0;
     s->dy = 0;
     s->dz = 0;
+    s->x = 0;
+    s->y = 0;
     s->buttons_state = 0;
 }
 
@@ -187,7 +339,7 @@ static int usb_mouse_handle_control(USBDevice *dev, int request, int value,
                                   int index, int length, uint8_t *data)
 {
     USBMouseState *s = (USBMouseState *)dev;
-    int ret;
+    int ret = 0;
 
     switch(request) {
     case DeviceRequest | USB_REQ_GET_STATUS:
@@ -224,9 +376,15 @@ static int usb_mouse_handle_control(USBDevice *dev, int request, int value,
             ret = sizeof(qemu_mouse_dev_descriptor);
             break;
         case USB_DT_CONFIG:
-            memcpy(data, qemu_mouse_config_descriptor, 
-                   sizeof(qemu_mouse_config_descriptor));
-            ret = sizeof(qemu_mouse_config_descriptor);
+	    if (s->kind == USB_MOUSE) {
+		memcpy(data, qemu_mouse_config_descriptor, 
+		       sizeof(qemu_mouse_config_descriptor));
+		ret = sizeof(qemu_mouse_config_descriptor);
+	    } else if (s->kind == USB_TABLET) {
+		memcpy(data, qemu_tablet_config_descriptor, 
+		       sizeof(qemu_tablet_config_descriptor));
+		ret = sizeof(qemu_tablet_config_descriptor);
+	    }		
             break;
         case USB_DT_STRING:
             switch(value & 0xff) {
@@ -244,7 +402,10 @@ static int usb_mouse_handle_control(USBDevice *dev, int request, int value,
                 break;
             case 2:
                 /* product description */
-                ret = set_usb_string(data, "QEMU USB Mouse");
+		if (s->kind == USB_MOUSE)
+		    ret = set_usb_string(data, "QEMU USB Mouse");
+		else if (s->kind == USB_TABLET)
+		    ret = set_usb_string(data, "QEMU USB Tablet");
                 break;
             case 3:
                 /* vendor description */
@@ -282,16 +443,25 @@ static int usb_mouse_handle_control(USBDevice *dev, int request, int value,
     case InterfaceRequest | USB_REQ_GET_DESCRIPTOR:
         switch(value >> 8) {
         case 0x22:
-            memcpy(data, qemu_mouse_hid_report_descriptor, 
-                   sizeof(qemu_mouse_hid_report_descriptor));
-            ret = sizeof(qemu_mouse_hid_report_descriptor);
-            break;
+	    if (s->kind == USB_MOUSE) {
+		memcpy(data, qemu_mouse_hid_report_descriptor, 
+		       sizeof(qemu_mouse_hid_report_descriptor));
+		ret = sizeof(qemu_mouse_hid_report_descriptor);
+	    } else if (s->kind == USB_TABLET) {
+		memcpy(data, qemu_tablet_hid_report_descriptor, 
+		       sizeof(qemu_tablet_hid_report_descriptor));
+		ret = sizeof(qemu_tablet_hid_report_descriptor);
+	    }
+	    break;
         default:
             goto fail;
         }
         break;
     case GET_REPORT:
-        ret = usb_mouse_poll(s, data, length);
+	if (s->kind == USB_MOUSE)
+	    ret = usb_mouse_poll(s, data, length);
+	else if (s->kind == USB_TABLET)
+	    ret = usb_tablet_poll(s, data, length);
         break;
     case SET_IDLE:
         ret = 0;
@@ -308,12 +478,15 @@ static int usb_mouse_handle_data(USBDevice *dev, int pid,
                                  uint8_t devep, uint8_t *data, int len)
 {
     USBMouseState *s = (USBMouseState *)dev;
-    int ret;
+    int ret = 0;
 
     switch(pid) {
     case USB_TOKEN_IN:
         if (devep == 1) {
-            ret = usb_mouse_poll(s, data, len);
+	    if (s->kind == USB_MOUSE)
+		ret = usb_mouse_poll(s, data, len);
+	    else if (s->kind == USB_TABLET)
+		ret = usb_tablet_poll(s, data, len);
         } else {
             goto fail;
         }
@@ -327,6 +500,24 @@ static int usb_mouse_handle_data(USBDevice *dev, int pid,
     return ret;
 }
 
+USBDevice *usb_tablet_init(void)
+{
+    USBMouseState *s;
+
+    s = qemu_mallocz(sizeof(USBMouseState));
+    if (!s)
+        return NULL;
+    s->dev.speed = USB_SPEED_FULL;
+    s->dev.handle_packet = usb_generic_handle_packet;
+
+    s->dev.handle_reset = usb_mouse_handle_reset;
+    s->dev.handle_control = usb_mouse_handle_control;
+    s->dev.handle_data = usb_mouse_handle_data;
+    s->kind = USB_TABLET;
+
+    return (USBDevice *)s;
+}
+
 USBDevice *usb_mouse_init(void)
 {
     USBMouseState *s;
@@ -340,8 +531,7 @@ USBDevice *usb_mouse_init(void)
     s->dev.handle_reset = usb_mouse_handle_reset;
     s->dev.handle_control = usb_mouse_handle_control;
     s->dev.handle_data = usb_mouse_handle_data;
+    s->kind = USB_MOUSE;
 
-    qemu_add_mouse_event_handler(usb_mouse_event, s);
-    
     return (USBDevice *)s;
 }