diff options
Diffstat (limited to 'hw/usb.c')
| -rw-r--r-- | hw/usb.c | 240 |
1 files changed, 158 insertions, 82 deletions
@@ -35,7 +35,8 @@ void usb_attach(USBPort *port) assert(dev->attached); assert(dev->state == USB_STATE_NOTATTACHED); port->ops->attach(port); - usb_send_msg(dev, USB_MSG_ATTACH); + dev->state = USB_STATE_ATTACHED; + usb_device_handle_attach(dev); } void usb_detach(USBPort *port) @@ -45,24 +46,41 @@ void usb_detach(USBPort *port) assert(dev != NULL); assert(dev->state != USB_STATE_NOTATTACHED); port->ops->detach(port); - usb_send_msg(dev, USB_MSG_DETACH); + dev->state = USB_STATE_NOTATTACHED; } -void usb_reset(USBPort *port) +void usb_port_reset(USBPort *port) { USBDevice *dev = port->dev; assert(dev != NULL); usb_detach(port); usb_attach(port); - usb_send_msg(dev, USB_MSG_RESET); + usb_device_reset(dev); } -void usb_wakeup(USBDevice *dev) +void usb_device_reset(USBDevice *dev) { + if (dev == NULL || !dev->attached) { + return; + } + dev->remote_wakeup = 0; + dev->addr = 0; + dev->state = USB_STATE_DEFAULT; + usb_device_handle_reset(dev); +} + +void usb_wakeup(USBEndpoint *ep) +{ + USBDevice *dev = ep->dev; + USBBus *bus = usb_bus_from_device(dev); + if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) { dev->port->ops->wakeup(dev->port); } + if (bus->ops->wakeup_endpoint) { + bus->ops->wakeup_endpoint(bus, ep); + } } /**********************/ @@ -128,8 +146,7 @@ static int do_token_in(USBDevice *s, USBPacket *p) int request, value, index; int ret = 0; - if (p->devep != 0) - return usb_device_handle_data(s, p); + assert(p->ep->nr == 0); request = (s->setup_buf[0] << 8) | s->setup_buf[1]; value = (s->setup_buf[3] << 8) | s->setup_buf[2]; @@ -175,8 +192,7 @@ static int do_token_in(USBDevice *s, USBPacket *p) static int do_token_out(USBDevice *s, USBPacket *p) { - if (p->devep != 0) - return usb_device_handle_data(s, p); + assert(p->ep->nr == 0); switch(s->setup_state) { case SETUP_STATE_ACK: @@ -209,51 +225,6 @@ static int do_token_out(USBDevice *s, USBPacket *p) } } -/* - * Generic packet handler. - * Called by the HC (host controller). - * - * Returns length of the transaction or one of the USB_RET_XXX codes. - */ -int usb_generic_handle_packet(USBDevice *s, USBPacket *p) -{ - switch(p->pid) { - case USB_MSG_ATTACH: - s->state = USB_STATE_ATTACHED; - usb_device_handle_attach(s); - return 0; - - case USB_MSG_DETACH: - s->state = USB_STATE_NOTATTACHED; - return 0; - - case USB_MSG_RESET: - s->remote_wakeup = 0; - s->addr = 0; - s->state = USB_STATE_DEFAULT; - usb_device_handle_reset(s); - return 0; - } - - /* Rest of the PIDs must match our address */ - if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr) - return USB_RET_NODEV; - - switch (p->pid) { - case USB_TOKEN_SETUP: - return do_token_setup(s, p); - - case USB_TOKEN_IN: - return do_token_in(s, p); - - case USB_TOKEN_OUT: - return do_token_out(s, p); - - default: - return USB_RET_STALL; - } -} - /* ctrl complete function for devices which use usb_generic_handle_packet and may return USB_RET_ASYNC from their handle_control callback. Device code which does this *must* call this function instead of the normal @@ -301,17 +272,39 @@ int set_usb_string(uint8_t *buf, const char *str) return q - buf; } -/* Send an internal message to a USB device. */ -void usb_send_msg(USBDevice *dev, int msg) +USBDevice *usb_find_device(USBPort *port, uint8_t addr) { - USBPacket p; - int ret; + USBDevice *dev = port->dev; - memset(&p, 0, sizeof(p)); - p.pid = msg; - ret = usb_handle_packet(dev, &p); - /* This _must_ be synchronous */ - assert(ret != USB_RET_ASYNC); + if (dev == NULL || !dev->attached || dev->state != USB_STATE_DEFAULT) { + return NULL; + } + if (dev->addr == addr) { + return dev; + } + return usb_device_find_device(dev, addr); +} + +static int usb_process_one(USBPacket *p) +{ + USBDevice *dev = p->ep->dev; + + if (p->ep->nr == 0) { + /* control pipe */ + switch (p->pid) { + case USB_TOKEN_SETUP: + return do_token_setup(dev, p); + case USB_TOKEN_IN: + return do_token_in(dev, p); + case USB_TOKEN_OUT: + return do_token_out(dev, p); + default: + return USB_RET_STALL; + } + } else { + /* data pipe */ + return usb_device_handle_data(dev, p); + } } /* Hand over a packet to a device for processing. Return value @@ -321,17 +314,27 @@ int usb_handle_packet(USBDevice *dev, USBPacket *p) { int ret; - assert(p->owner == NULL); - ret = usb_device_handle_packet(dev, p); - if (ret == USB_RET_ASYNC) { - if (p->owner == NULL) { - p->owner = usb_ep_get(dev, p->pid, p->devep); + if (dev == NULL) { + return USB_RET_NODEV; + } + assert(dev == p->ep->dev); + assert(dev->state == USB_STATE_DEFAULT); + assert(p->state == USB_PACKET_SETUP); + assert(p->ep != NULL); + + if (QTAILQ_EMPTY(&p->ep->queue)) { + ret = usb_process_one(p); + if (ret == USB_RET_ASYNC) { + usb_packet_set_state(p, USB_PACKET_ASYNC); + QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue); } else { - /* We'll end up here when usb_handle_packet is called - * recursively due to a hub being in the chain. Nothing - * to do. Leave p->owner pointing to the device, not the - * hub. */; + p->result = ret; + usb_packet_set_state(p, USB_PACKET_COMPLETE); } + } else { + ret = USB_RET_ASYNC; + usb_packet_set_state(p, USB_PACKET_QUEUED); + QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue); } return ret; } @@ -341,10 +344,28 @@ int usb_handle_packet(USBDevice *dev, USBPacket *p) handle_packet. */ void usb_packet_complete(USBDevice *dev, USBPacket *p) { - /* Note: p->owner != dev is possible in case dev is a hub */ - assert(p->owner != NULL); - p->owner = NULL; + USBEndpoint *ep = p->ep; + int ret; + + assert(p->state == USB_PACKET_ASYNC); + assert(QTAILQ_FIRST(&ep->queue) == p); + usb_packet_set_state(p, USB_PACKET_COMPLETE); + QTAILQ_REMOVE(&ep->queue, p, queue); dev->port->ops->complete(dev->port, p); + + while (!QTAILQ_EMPTY(&ep->queue)) { + p = QTAILQ_FIRST(&ep->queue); + assert(p->state == USB_PACKET_QUEUED); + ret = usb_process_one(p); + if (ret == USB_RET_ASYNC) { + usb_packet_set_state(p, USB_PACKET_ASYNC); + break; + } + p->result = ret; + usb_packet_set_state(p, USB_PACKET_COMPLETE); + QTAILQ_REMOVE(&ep->queue, p, queue); + dev->port->ops->complete(dev->port, p); + } } /* Cancel an active packet. The packed must have been deferred by @@ -352,9 +373,13 @@ void usb_packet_complete(USBDevice *dev, USBPacket *p) completed. */ void usb_cancel_packet(USBPacket * p) { - assert(p->owner != NULL); - usb_device_cancel_packet(p->owner->dev, p); - p->owner = NULL; + bool callback = (p->state == USB_PACKET_ASYNC); + assert(usb_packet_is_inflight(p)); + usb_packet_set_state(p, USB_PACKET_CANCELED); + QTAILQ_REMOVE(&p->ep->queue, p, queue); + if (callback) { + usb_device_cancel_packet(p->ep->dev, p); + } } @@ -363,13 +388,50 @@ void usb_packet_init(USBPacket *p) qemu_iovec_init(&p->iov, 1); } -void usb_packet_setup(USBPacket *p, int pid, uint8_t addr, uint8_t ep) +void usb_packet_set_state(USBPacket *p, USBPacketState state) +{ +#ifdef DEBUG + static const char *name[] = { + [USB_PACKET_UNDEFINED] = "undef", + [USB_PACKET_SETUP] = "setup", + [USB_PACKET_QUEUED] = "queued", + [USB_PACKET_ASYNC] = "async", + [USB_PACKET_COMPLETE] = "complete", + [USB_PACKET_CANCELED] = "canceled", + }; + static const char *rets[] = { + [-USB_RET_NODEV] = "NODEV", + [-USB_RET_NAK] = "NAK", + [-USB_RET_STALL] = "STALL", + [-USB_RET_BABBLE] = "BABBLE", + [-USB_RET_ASYNC] = "ASYNC", + }; + char add[16] = ""; + + if (state == USB_PACKET_COMPLETE) { + if (p->result < 0) { + snprintf(add, sizeof(add), " - %s", rets[-p->result]); + } else { + snprintf(add, sizeof(add), " - %d", p->result); + } + } + fprintf(stderr, "bus %s, port %s, dev %d, ep %d: packet %p: %s -> %s%s\n", + p->ep->dev->qdev.parent_bus->name, + p->ep->dev->port->path, + p->ep->dev->addr, p->ep->nr, + p, name[p->state], name[state], add); +#endif + p->state = state; +} + +void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep) { + assert(!usb_packet_is_inflight(p)); p->pid = pid; - p->devaddr = addr; - p->devep = ep; + p->ep = ep; p->result = 0; qemu_iovec_reset(&p->iov); + usb_packet_set_state(p, USB_PACKET_SETUP); } void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len) @@ -408,6 +470,7 @@ void usb_packet_skip(USBPacket *p, size_t bytes) void usb_packet_cleanup(USBPacket *p) { + assert(!usb_packet_is_inflight(p)); qemu_iovec_destroy(&p->iov); } @@ -415,16 +478,24 @@ void usb_ep_init(USBDevice *dev) { int ep; + dev->ep_ctl.nr = 0; dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL; dev->ep_ctl.ifnum = 0; dev->ep_ctl.dev = dev; + QTAILQ_INIT(&dev->ep_ctl.queue); for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) { + dev->ep_in[ep].nr = ep + 1; + dev->ep_out[ep].nr = ep + 1; + dev->ep_in[ep].pid = USB_TOKEN_IN; + dev->ep_out[ep].pid = USB_TOKEN_OUT; dev->ep_in[ep].type = USB_ENDPOINT_XFER_INVALID; dev->ep_out[ep].type = USB_ENDPOINT_XFER_INVALID; dev->ep_in[ep].ifnum = 0; dev->ep_out[ep].ifnum = 0; dev->ep_in[ep].dev = dev; dev->ep_out[ep].dev = dev; + QTAILQ_INIT(&dev->ep_in[ep].queue); + QTAILQ_INIT(&dev->ep_out[ep].queue); } } @@ -472,7 +543,12 @@ void usb_ep_dump(USBDevice *dev) struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep) { - struct USBEndpoint *eps = pid == USB_TOKEN_IN ? dev->ep_in : dev->ep_out; + struct USBEndpoint *eps; + + if (dev == NULL) { + return NULL; + } + eps = (pid == USB_TOKEN_IN) ? dev->ep_in : dev->ep_out; if (ep == 0) { return &dev->ep_ctl; } |