carl9170 firmware: add fall through comments
[carl9170fw.git] / carlfw / usb / usb.c
index 0d339801e4767572968bab4ee1586bbe2295165d..aedf30d1404830bb989e9ba8caeb4a459aee5fc1 100644 (file)
@@ -19,8 +19,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; If not, see <http://www.gnu.org/licenses/>.
  */
 #include "carl9170.h"
 #include "usb.h"
@@ -159,15 +158,14 @@ static struct ar9170_usb_config usb_config_fullspeed = {
                        .bLength = USB_DT_ENDPOINT_SIZE,
                        .bDescriptorType = USB_DT_ENDPOINT,
                        .bEndpointAddress = USB_DIR_OUT | AR9170_USB_EP_CMD,
-                       .bmAttributes = USB_ENDPOINT_XFER_INT,
+                       .bmAttributes = USB_ENDPOINT_XFER_BULK,
                        .wMaxPacketSize = cpu_to_le16(64),
                        .bInterval = 1,
                },
        },
 };
 
-#ifdef CONFIG_CARL9170FW_USB_MODESWITCH
-static void usb_reset_eps(void)
+void usb_reset_eps(void)
 {
        unsigned int i;
 
@@ -175,6 +173,7 @@ static void usb_reset_eps(void)
        for (i = 1; i < __AR9170_USB_NUM_MAX_EP; i++) {
                usb_set_input_ep_toggle(i);
                usb_clear_input_ep_toggle(i);
+               usb_clear_input_ep_stall(i);
        }
 
        /*
@@ -184,12 +183,10 @@ static void usb_reset_eps(void)
        for (i = 1; i < __AR9170_USB_NUM_MAX_EP; i++) {
                usb_set_output_ep_toggle(i);
                usb_clear_output_ep_toggle(i);
+               usb_clear_output_ep_stall(i);
        }
 }
-#endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
 
-
-#ifdef CONFIG_CARL9170FW_USB_INIT_FIRMWARE
 static void usb_pta_init(void)
 {
        unsigned int usb_dma_ctrl = 0;
@@ -251,13 +248,10 @@ static void usb_pta_init(void)
 
        set(AR9170_USB_REG_DMA_CTL, usb_dma_ctrl);
 }
-#endif /* CONFIG_CARL9170FW_USB_INIT_FIRMWARE */
 
 void usb_init(void)
 {
-#ifdef CONFIG_CARL9170FW_USB_INIT_FIRMWARE
        usb_pta_init();
-#endif /* CONFIG_CARL9170FW_USB_INIT_FIRMWARE */
 
        fw.usb.config = 1;
        /*
@@ -341,7 +335,30 @@ static int usb_get_status(const struct usb_ctrlrequest *ctrl)
                status = cpu_to_le16(0);
                break;
 
-       case USB_RECIP_ENDPOINT:
+       case USB_RECIP_ENDPOINT: {
+               unsigned int ep = le16_to_cpu(ctrl->wIndex) & 0xf;
+               unsigned int dir = le16_to_cpu(ctrl->wIndex) & USB_DIR_MASK;
+
+               if (ep == 0) {
+                       status = !!(getb(AR9170_USB_REG_CX_CONFIG_STATUS) & BIT(2));
+               } else {
+                       unsigned int addr;
+
+                       if (dir == USB_DIR_IN)
+                               addr = AR9170_USB_REG_EP_IN_MAX_SIZE_HIGH;
+                       else
+                               addr = AR9170_USB_REG_EP_OUT_MAX_SIZE_HIGH;
+
+                       addr += (ep << 1);
+
+                       /*
+                        * AR9170_USB_EP_OUT_STALL == AR9170_USB_EP_IN_STALL
+                        * so it doesn't matter which one we use
+                        */
+                       status = !!(getb(addr) & AR9170_USB_EP_OUT_STALL);
+               }
+               break;
+               }
        case USB_RECIP_OTHER:
        default:
                break;
@@ -482,7 +499,7 @@ static int usb_get_configuration(const struct usb_ctrlrequest *ctrl)
        if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_DEVICE, USB_DIR_IN))
                return -1;
 
-       return usb_ep0tx_data(&fw.usb.config, 1);
+       return usb_ep0tx_data(&fw.usb.config, fw.usb.config);
 }
 
 static int usb_set_configuration(const struct usb_ctrlrequest *ctrl)
@@ -498,10 +515,11 @@ static int usb_set_configuration(const struct usb_ctrlrequest *ctrl)
                /* Disable Device */
                andb(AR9170_USB_REG_DEVICE_ADDRESS,
                      (uint8_t) ~(AR9170_USB_DEVICE_ADDRESS_CONFIGURE));
-#ifdef CONFIG_CARL9170FW_USB_MODESWITCH
+               /* fall through */
        case 1:
                fw.usb.config = config;
 
+#ifdef CONFIG_CARL9170FW_USB_MODESWITCH
                if (usb_detect_highspeed()) {
                        /* High Speed Configuration */
                        usb_init_highspeed_fifo_cfg();
@@ -509,25 +527,20 @@ static int usb_set_configuration(const struct usb_ctrlrequest *ctrl)
                        /* Full Speed Configuration */
                        usb_init_fullspeed_fifo_cfg();
                }
-               break;
+               /* usb_pta_init() ? */
+#endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
 
-       default:
-               return -1;
-       }
-       /* usb_pta_init() ? */
+               usb_reset_eps();
+               orb(AR9170_USB_REG_DEVICE_ADDRESS,
+                   (AR9170_USB_DEVICE_ADDRESS_CONFIGURE));
 
-       usb_reset_eps();
-       orb(AR9170_USB_REG_DEVICE_ADDRESS,
-           (AR9170_USB_DEVICE_ADDRESS_CONFIGURE));
+               usb_enable_global_int();
+               usb_trigger_out();
+               return 1;
 
-       usb_enable_global_int();
-       usb_trigger_out();
-       return 1;
-#else
        default:
                return -1;
        }
-#endif /* CONFIG_CARL9170FW_USB_MODESWITCH */
 }
 
 static int usb_set_address(const struct usb_ctrlrequest *ctrl)
@@ -575,7 +588,8 @@ static int usb_get_interface(const struct usb_ctrlrequest *ctrl)
 static int usb_manipulate_feature(const struct usb_ctrlrequest *ctrl, bool __unused clear)
 {
        unsigned int feature;
-        if (USB_CHECK_REQTYPE(ctrl, USB_RECIP_DEVICE, USB_DIR_OUT))
+
+       if ((ctrl->bRequestType & USB_DIR_MASK) != USB_DIR_OUT)
                return -1;
 
        if (usb_configured() == false)
@@ -583,19 +597,61 @@ static int usb_manipulate_feature(const struct usb_ctrlrequest *ctrl, bool __unu
 
        feature = le16_to_cpu(ctrl->wValue);
 
+       switch (ctrl->bRequestType & USB_RECIP_MASK) {
+       case USB_RECIP_DEVICE: {
 #ifdef CONFIG_CARL9170FW_WOL
-       if (feature & USB_DEVICE_REMOTE_WAKEUP) {
+               if (feature & USB_DEVICE_REMOTE_WAKEUP) {
+                       if (clear)
+                               usb_disable_remote_wakeup();
+                       else
+                               usb_enable_remote_wakeup();
+               }
+#endif /* CONFIG_CARL9170FW_WOL */
+
                if (clear)
-                       usb_disable_remote_wakeup();
+                       fw.usb.device_feature &= ~feature;
                else
-                       usb_enable_remote_wakeup();
-       }
-#endif /* CONFIG_CARL9170FW_WOL */
+                       fw.usb.device_feature |= feature;
+
+
+               break;
+               }
+
+       case USB_RECIP_ENDPOINT: {
+               unsigned int ep, dir;
+
+               ep = le16_to_cpu(ctrl->wIndex) & 0xf;
+               dir = le16_to_cpu(ctrl->wIndex) & USB_DIR_MASK;
+               if (ep == 0) {
+                       /* According to the spec, EP cannot be stopped this way. */
+                       return -1;
+               } else {
+                       unsigned int addr;
+
+                       if (dir == USB_DIR_IN)
+                               addr = AR9170_USB_REG_EP_IN_MAX_SIZE_HIGH;
+                       else
+                               addr = AR9170_USB_REG_EP_OUT_MAX_SIZE_HIGH;
+
+                       addr += (ep << 1);
 
-       if (clear)
-               fw.usb.device_feature &= ~feature;
-       else
-               fw.usb.device_feature |= feature;
+                       if (clear)
+                               andb(addr, ~AR9170_USB_EP_OUT_STALL);
+                       else
+                               orb(addr, AR9170_USB_EP_OUT_STALL);
+               }
+               break;
+               }
+
+       case USB_RECIP_INTERFACE:
+               /*
+                * the current USB Specification Revision 2
+                * specifies no interface features.
+                */
+
+       default:
+               return -1;
+       }
 
        return 1;
 }
@@ -649,7 +705,7 @@ static int usb_standard_command(const struct usb_ctrlrequest *ctrl __unused)
 
        case USB_REQ_CLEAR_FEATURE:
        case USB_REQ_SET_FEATURE:
-               usb_manipulate_feature(ctrl, ctrl->bRequest == USB_REQ_CLEAR_FEATURE);
+               status = usb_manipulate_feature(ctrl, ctrl->bRequest == USB_REQ_CLEAR_FEATURE);
                break;
 
        case USB_REQ_SET_ADDRESS: