Changeset 00694c5 in mainline for uspace/drv/bus/usb/ohci/root_hub.c

Timestamp:

2011-07-11T16:48:43Z (13 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b21dfba

Parents:

5af769c

Message:

OHCI: Root hub: Add some comments and minor changes.

File:

• uspace/drv/bus/usb/ohci/root_hub.c (modified) (9 diffs)

uspace/drv/bus/usb/ohci/root_hub.c

@@ -58 +58 @@
         .device_version = 0,
         .length = sizeof (usb_standard_device_descriptor_t),
-        .max_packet_size = 8,
+        .max_packet_size = 64,
         .vendor_id = 0x16db,
         .product_id = 0x0001,
@@ -101 +101 @@
         .descriptor_type = USB_DESCTYPE_ENDPOINT,
         .endpoint_address = 1 + (1 << 7),
-        .length = sizeof (usb_standard_endpoint_descriptor_t),
-        .max_packet_size = 8,
+        .length = sizeof(usb_standard_endpoint_descriptor_t),
+        .max_packet_size = 2,
         .poll_interval = 255,
 };
-
-/**
- * bitmask of hub features that are valid to be set
- */
-static const uint32_t hub_set_feature_valid_mask =
-    RHS_LPSC_FLAG |
-    RHS_OCIC_FLAG;
-
-/**
- * bitmask of hub features that are set by writing 1 and cleared by writing 0
- */
-static const uint32_t hub_set_feature_direct_mask =
-    RHS_SET_PORT_POWER;
 
 /**
@@ -145 +132 @@
 //USB_HUB_FEATURE_PORT_LOW_SPEED for port set feature request
 
-/**
- * bitmask with port status changes
- */
-static const uint32_t port_status_change_mask = RHPS_CHANGE_WC_MASK;
-
 static void create_serialized_hub_descriptor(rh_t *instance);
-
 static void rh_init_descriptors(rh_t *instance);
-
 static void create_interrupt_mask_in_instance(rh_t *instance);
-
-static int get_status_request(
-    rh_t *instance, usb_transfer_batch_t *request);
-
+static int get_status_request(rh_t *instance, usb_transfer_batch_t *request);
 static int get_descriptor_request(
     rh_t *instance, usb_transfer_batch_t *request);
-
 static int port_feature_set_request(
     rh_t *instance, uint16_t feature, uint16_t port);
-
 static int port_feature_clear_request(
     rh_t *instance, uint16_t feature, uint16_t port);
-
-static int request_with_output(
+static int request_with_output(rh_t *instance, usb_transfer_batch_t *request);
+static int request_without_data(rh_t *instance, usb_transfer_batch_t *request);
+static int ctrl_request(rh_t *instance, usb_transfer_batch_t *request);
+static void interrupt_mask_in_instance(
     rh_t *instance, usb_transfer_batch_t *request);
-
-static int request_without_data(
-    rh_t *instance, usb_transfer_batch_t *request);
-
-static int ctrl_request(rh_t *instance, usb_transfer_batch_t *request);
-
-static int interrupt_mask_in_instance(
-    rh_t *instance, usb_transfer_batch_t *request);
-
 static bool is_zeros(const void *buffer, size_t size);
 
@@ -381 +349 @@
         }
 
+        /* Hub status: just filter relevant info from rh_status reg */
         if (request_packet->request_type == USB_HUB_REQ_TYPE_GET_HUB_STATUS) {
                 const uint32_t data = instance->registers->rh_status &
@@ -388 +357 @@
         }
 
+        /* Copy appropriate rh_port_status register, OHCI designers were
+         * kind enough to make those bit values match USB specification */
         if (request_packet->request_type == USB_HUB_REQ_TYPE_GET_PORT_STATUS) {
-                unsigned port = request_packet->index;
+                const unsigned port = request_packet->index;
                 if (port < 1 || port > instance->port_count)
                         return EINVAL;
@@ -417 +388 @@
 
         uint8_t * bitmap = instance->interrupt_buffer;
-        uint32_t mask = (1 << (USB_HUB_FEATURE_C_HUB_LOCAL_POWER + 16))
-            | (1 << (USB_HUB_FEATURE_C_HUB_OVER_CURRENT + 16));
         bzero(bitmap, instance->interrupt_mask_size);
-        if ((instance->registers->rh_status & mask) != 0) {
+        /* Only local power source change and over-current change can happen */
+        if (instance->registers->rh_status & (RHS_LPSC_FLAG | RHS_OCIC_FLAG)) {
                 bitmap[0] = 1;
         }
-        mask = port_status_change_mask;
         size_t port = 1;
         for (; port <= instance->port_count; ++port) {
-                if ((mask & instance->registers->rh_port_status[port - 1]) != 0) {
-
-                        bitmap[(port) / 8] += 1 << (port % 8);
+                /* Write-clean bits are those that indicate change */
+                if (RHPS_CHANGE_WC_MASK
+                    & instance->registers->rh_port_status[port - 1]) {
+
+                        bitmap[(port) / 8] |= 1 << (port % 8);
                 }
         }
@@ -731 +702 @@
 /*----------------------------------------------------------------------------*/
 /**
- * process hanging interrupt request
+ * Process waiting interrupt request
  *
  * If an interrupt transfer has been received and there was no change,
@@ -743 +714 @@
  * @return
  */
-int interrupt_mask_in_instance(
-    rh_t *instance, usb_transfer_batch_t *request)
+void interrupt_mask_in_instance(rh_t *instance, usb_transfer_batch_t *request)
 {
         assert(instance);
@@ -754 +724 @@
         instance->unfinished_interrupt_transfer = NULL;
         usb_transfer_batch_finish_error(request, EOK);
-
-        return EOK;
 }
 /*----------------------------------------------------------------------------*/