diff options
author | 2016-05-18 13:18:31 +0300 | |
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committer | 2016-05-18 13:42:15 +0300 | |
commit | 437fd90c0250dee670290f9b714253671a990160 (patch) | |
tree | b871786c360704244a07411c69fb58da9ead4a06 /qemu/roms/ipxe/src/drivers/usb/usbhub.c | |
parent | 5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff) |
These changes are the raw update to qemu-2.6.
Collission happened in the following patches:
migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)
The code provided by the patches was already in the upstreamed
version.
Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/usb/usbhub.c')
-rw-r--r-- | qemu/roms/ipxe/src/drivers/usb/usbhub.c | 547 |
1 files changed, 547 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/drivers/usb/usbhub.c b/qemu/roms/ipxe/src/drivers/usb/usbhub.c new file mode 100644 index 000000000..bf2a20005 --- /dev/null +++ b/qemu/roms/ipxe/src/drivers/usb/usbhub.c @@ -0,0 +1,547 @@ +/* + * Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 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. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <assert.h> +#include <byteswap.h> +#include <ipxe/usb.h> +#include "usbhub.h" + +/** @file + * + * USB hub driver + * + */ + +/** + * Refill interrupt ring + * + * @v hubdev Hub device + */ +static void hub_refill ( struct usb_hub_device *hubdev ) { + int rc; + + /* Refill interrupt endpoint */ + if ( ( rc = usb_refill ( &hubdev->intr ) ) != 0 ) { + DBGC ( hubdev, "HUB %s could not refill interrupt: %s\n", + hubdev->name, strerror ( rc ) ); + /* Continue attempting to refill */ + return; + } + + /* Stop refill process */ + process_del ( &hubdev->refill ); +} + +/** Refill process descriptor */ +static struct process_descriptor hub_refill_desc = + PROC_DESC ( struct usb_hub_device, refill, hub_refill ); + +/** + * Complete interrupt transfer + * + * @v ep USB endpoint + * @v iobuf I/O buffer + * @v rc Completion status code + */ +static void hub_complete ( struct usb_endpoint *ep, + struct io_buffer *iobuf, int rc ) { + struct usb_hub_device *hubdev = + container_of ( ep, struct usb_hub_device, intr ); + struct usb_hub *hub = hubdev->hub; + uint8_t *data = iobuf->data; + unsigned int bits = ( 8 * iob_len ( iobuf ) ); + unsigned int i; + + /* Ignore packets cancelled when the endpoint closes */ + if ( ! ep->open ) + goto done; + + /* Ignore packets with errors */ + if ( rc != 0 ) { + DBGC ( hubdev, "HUB %s interrupt failed: %s\n", + hubdev->name, strerror ( rc ) ); + DBGC_HDA ( hubdev, 0, iobuf->data, iob_len ( iobuf ) ); + goto done; + } + + /* Report any port status changes */ + for ( i = 1 ; i <= hub->ports ; i++ ) { + + /* Sanity check */ + if ( i > bits ) { + DBGC ( hubdev, "HUB %s underlength interrupt:\n", + hubdev->name ); + DBGC_HDA ( hubdev, 0, iobuf->data, iob_len ( iobuf ) ); + goto done; + } + + /* Report port status change if applicable */ + if ( data[ i / 8 ] & ( 1 << ( i % 8 ) ) ) { + DBGC2 ( hubdev, "HUB %s port %d status changed\n", + hubdev->name, i ); + usb_port_changed ( usb_port ( hub, i ) ); + } + } + + done: + /* Start refill process */ + process_add ( &hubdev->refill ); +} + +/** Interrupt endpoint operations */ +static struct usb_endpoint_driver_operations usb_hub_intr_operations = { + .complete = hub_complete, +}; + +/** + * Open hub + * + * @v hub USB hub + * @ret rc Return status code + */ +static int hub_open ( struct usb_hub *hub ) { + struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub ); + struct usb_device *usb = hubdev->usb; + unsigned int i; + int rc; + + /* Ensure ports are powered */ + for ( i = 1 ; i <= hub->ports ; i++ ) { + if ( ( rc = usb_hub_set_port_feature ( usb, i, + USB_HUB_PORT_POWER, + 0 ) ) != 0 ) { + DBGC ( hubdev, "HUB %s port %d could not apply power: " + "%s\n", hubdev->name, i, strerror ( rc ) ); + goto err_power; + } + } + + /* Open interrupt endpoint */ + if ( ( rc = usb_endpoint_open ( &hubdev->intr ) ) != 0 ) { + DBGC ( hubdev, "HUB %s could not register interrupt: %s\n", + hubdev->name, strerror ( rc ) ); + goto err_open; + } + + /* Start refill process */ + process_add ( &hubdev->refill ); + + /* Refill interrupt ring */ + hub_refill ( hubdev ); + + return 0; + + usb_endpoint_close ( &hubdev->intr ); + err_open: + err_power: + return rc; +} + +/** + * Close hub + * + * @v hub USB hub + */ +static void hub_close ( struct usb_hub *hub ) { + struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub ); + + /* Close interrupt endpoint */ + usb_endpoint_close ( &hubdev->intr ); + + /* Stop refill process */ + process_del ( &hubdev->refill ); +} + +/** + * Enable port + * + * @v hub USB hub + * @v port USB port + * @ret rc Return status code + */ +static int hub_enable ( struct usb_hub *hub, struct usb_port *port ) { + struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub ); + struct usb_device *usb = hubdev->usb; + struct usb_hub_port_status status; + unsigned int current; + unsigned int i; + int rc; + + /* Initiate reset if applicable */ + if ( ( hub->protocol < USB_PROTO_3_0 ) && + ( ( rc = usb_hub_set_port_feature ( usb, port->address, + USB_HUB_PORT_RESET, 0 ) )!=0)){ + DBGC ( hubdev, "HUB %s port %d could not initiate reset: %s\n", + hubdev->name, port->address, strerror ( rc ) ); + return rc; + } + + /* Wait for port to become enabled */ + for ( i = 0 ; i < USB_HUB_ENABLE_MAX_WAIT_MS ; i++ ) { + + /* Check for port being enabled */ + if ( ( rc = usb_hub_get_port_status ( usb, port->address, + &status ) ) != 0 ) { + DBGC ( hubdev, "HUB %s port %d could not get status: " + "%s\n", hubdev->name, port->address, + strerror ( rc ) ); + return rc; + } + current = le16_to_cpu ( status.current ); + if ( current & ( 1 << USB_HUB_PORT_ENABLE ) ) + return 0; + + /* Delay */ + mdelay ( 1 ); + } + + DBGC ( hubdev, "HUB %s port %d timed out waiting for enable\n", + hubdev->name, port->address ); + return -ETIMEDOUT; +} + +/** + * Disable port + * + * @v hub USB hub + * @v port USB port + * @ret rc Return status code + */ +static int hub_disable ( struct usb_hub *hub, struct usb_port *port ) { + struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub ); + struct usb_device *usb = hubdev->usb; + int rc; + + /* Disable port */ + if ( ( rc = usb_hub_clear_port_feature ( usb, port->address, + USB_HUB_PORT_ENABLE, 0 ) )!=0){ + DBGC ( hubdev, "HUB %s port %d could not disable: %s\n", + hubdev->name, port->address, strerror ( rc ) ); + return rc; + } + + return 0; +} + +/** + * Clear port status change bits + * + * @v hubdev USB hub device + * @v port Port number + * @v changed Port status change bits + * @ret rc Return status code + */ +static int hub_clear_changes ( struct usb_hub_device *hubdev, + unsigned int port, uint16_t changed ) { + struct usb_device *usb = hubdev->usb; + unsigned int bit; + unsigned int feature; + int rc; + + /* Clear each set bit */ + for ( bit = 0 ; bit < 16 ; bit++ ) { + + /* Skip unset bits */ + if ( ! ( changed & ( 1 << bit ) ) ) + continue; + + /* Skip unused features */ + feature = USB_HUB_C_FEATURE ( bit ); + if ( ! ( hubdev->features & ( 1 << feature ) ) ) + continue; + + /* Clear bit */ + if ( ( rc = usb_hub_clear_port_feature ( usb, port, + feature, 0 ) ) != 0 ) { + DBGC ( hubdev, "HUB %s port %d could not clear feature " + "%d: %s\n", hubdev->name, port, feature, + strerror ( rc ) ); + return rc; + } + } + + return 0; +} + +/** + * Update port speed + * + * @v hub USB hub + * @v port USB port + * @ret rc Return status code + */ +static int hub_speed ( struct usb_hub *hub, struct usb_port *port ) { + struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub ); + struct usb_device *usb = hubdev->usb; + struct usb_hub_port_status status; + unsigned int current; + unsigned int changed; + int rc; + + /* Get port status */ + if ( ( rc = usb_hub_get_port_status ( usb, port->address, + &status ) ) != 0 ) { + DBGC ( hubdev, "HUB %s port %d could not get status: %s\n", + hubdev->name, port->address, strerror ( rc ) ); + return rc; + } + current = le16_to_cpu ( status.current ); + changed = le16_to_cpu ( status.changed ); + DBGC2 ( hubdev, "HUB %s port %d status is %04x:%04x\n", + hubdev->name, port->address, changed, current ); + + /* Update port speed */ + if ( current & ( 1 << USB_HUB_PORT_CONNECTION ) ) { + if ( hub->protocol >= USB_PROTO_3_0 ) { + port->speed = USB_SPEED_SUPER; + } else if ( current & ( 1 << USB_HUB_PORT_LOW_SPEED ) ) { + port->speed = USB_SPEED_LOW; + } else if ( current & ( 1 << USB_HUB_PORT_HIGH_SPEED ) ) { + port->speed = USB_SPEED_HIGH; + } else { + port->speed = USB_SPEED_FULL; + } + } else { + port->speed = USB_SPEED_NONE; + } + + /* Record disconnections */ + port->disconnected |= ( changed & ( 1 << USB_HUB_PORT_CONNECTION ) ); + + /* Clear port status change bits */ + if ( ( rc = hub_clear_changes ( hubdev, port->address, changed ) ) != 0) + return rc; + + return 0; +} + +/** + * Clear transaction translator buffer + * + * @v hub USB hub + * @v port USB port + * @v ep USB endpoint + * @ret rc Return status code + */ +static int hub_clear_tt ( struct usb_hub *hub, struct usb_port *port, + struct usb_endpoint *ep ) { + struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub ); + struct usb_device *usb = hubdev->usb; + int rc; + + /* Clear transaction translator buffer. All hubs must support + * single-TT operation; we simplify our code by supporting + * only this configuration. + */ + if ( ( rc = usb_hub_clear_tt_buffer ( usb, ep->usb->address, + ep->address, ep->attributes, + USB_HUB_TT_SINGLE ) ) != 0 ) { + DBGC ( hubdev, "HUB %s port %d could not clear TT buffer: %s\n", + hubdev->name, port->address, strerror ( rc ) ); + return rc; + } + + return 0; +} + +/** USB hub operations */ +static struct usb_hub_driver_operations hub_operations = { + .open = hub_open, + .close = hub_close, + .enable = hub_enable, + .disable = hub_disable, + .speed = hub_speed, + .clear_tt = hub_clear_tt, +}; + +/** + * Probe USB hub + * + * @v func USB function + * @v config Configuration descriptor + * @ret rc Return status code + */ +static int hub_probe ( struct usb_function *func, + struct usb_configuration_descriptor *config ) { + struct usb_device *usb = func->usb; + struct usb_bus *bus = usb->port->hub->bus; + struct usb_hub_device *hubdev; + struct usb_interface_descriptor *interface; + union usb_hub_descriptor desc; + unsigned int depth; + unsigned int ports; + int enhanced; + int rc; + + /* Allocate and initialise structure */ + hubdev = zalloc ( sizeof ( *hubdev ) ); + if ( ! hubdev ) { + rc = -ENOMEM; + goto err_alloc; + } + enhanced = ( usb->port->protocol >= USB_PROTO_3_0 ); + hubdev->name = func->name; + hubdev->usb = usb; + hubdev->features = + ( enhanced ? USB_HUB_FEATURES_ENHANCED : USB_HUB_FEATURES ); + usb_endpoint_init ( &hubdev->intr, usb, &usb_hub_intr_operations ); + usb_refill_init ( &hubdev->intr, 0, USB_HUB_INTR_FILL ); + process_init_stopped ( &hubdev->refill, &hub_refill_desc, NULL ); + + /* Locate hub interface descriptor */ + interface = usb_interface_descriptor ( config, func->interface[0], 0 ); + if ( ! interface ) { + DBGC ( hubdev, "HUB %s has no interface descriptor\n", + hubdev->name ); + rc = -EINVAL; + goto err_interface; + } + + /* Locate interrupt endpoint descriptor */ + if ( ( rc = usb_endpoint_described ( &hubdev->intr, config, interface, + USB_INTERRUPT_IN, 0 ) ) != 0 ) { + DBGC ( hubdev, "HUB %s could not describe interrupt endpoint: " + "%s\n", hubdev->name, strerror ( rc ) ); + goto err_endpoint; + } + + /* Set hub depth */ + depth = usb_depth ( usb ); + if ( enhanced ) { + if ( ( rc = usb_hub_set_hub_depth ( usb, depth ) ) != 0 ) { + DBGC ( hubdev, "HUB %s could not set hub depth to %d: " + "%s\n", hubdev->name, depth, strerror ( rc ) ); + goto err_set_hub_depth; + } + } + + /* Get hub descriptor */ + if ( ( rc = usb_hub_get_descriptor ( usb, enhanced, &desc ) ) != 0 ) { + DBGC ( hubdev, "HUB %s could not get hub descriptor: %s\n", + hubdev->name, strerror ( rc ) ); + goto err_hub_descriptor; + } + ports = desc.basic.ports; + DBGC ( hubdev, "HUB %s has %d ports at depth %d%s\n", hubdev->name, + ports, depth, ( enhanced ? " (enhanced)" : "" ) ); + + /* Allocate hub */ + hubdev->hub = alloc_usb_hub ( bus, usb, ports, &hub_operations ); + if ( ! hubdev->hub ) { + rc = -ENOMEM; + goto err_alloc_hub; + } + usb_hub_set_drvdata ( hubdev->hub, hubdev ); + + /* Register hub */ + if ( ( rc = register_usb_hub ( hubdev->hub ) ) != 0 ) { + DBGC ( hubdev, "HUB %s could not register: %s\n", + hubdev->name, strerror ( rc ) ); + goto err_register_hub; + } + + usb_func_set_drvdata ( func, hubdev ); + return 0; + + unregister_usb_hub ( hubdev->hub ); + err_register_hub: + free_usb_hub ( hubdev->hub ); + err_alloc_hub: + err_hub_descriptor: + err_set_hub_depth: + err_endpoint: + err_interface: + free ( hubdev ); + err_alloc: + return rc; +} + +/** + * Remove USB hub + * + * @v func USB function + * @ret rc Return status code + */ +static void hub_remove ( struct usb_function *func ) { + struct usb_hub_device *hubdev = usb_func_get_drvdata ( func ); + struct usb_hub *hub = hubdev->hub; + struct usb_device *usb = hubdev->usb; + struct usb_port *port; + unsigned int i; + + /* If hub has been unplugged, mark all ports as unplugged */ + if ( usb->port->speed == USB_SPEED_NONE ) { + for ( i = 1 ; i <= hub->ports ; i++ ) { + port = usb_port ( hub, i ); + port->speed = USB_SPEED_NONE; + } + } + + /* Unregister hub */ + unregister_usb_hub ( hubdev->hub ); + assert ( ! process_running ( &hubdev->refill ) ); + + /* Free hub */ + free_usb_hub ( hubdev->hub ); + + /* Free hub device */ + free ( hubdev ); +} + +/** USB hub device IDs */ +static struct usb_device_id hub_ids[] = { + { + .name = "hub-1", + .vendor = USB_ANY_ID, + .product = USB_ANY_ID, + .class = { + .class = USB_CLASS_HUB, + .subclass = 0, + .protocol = 0, + }, + }, + { + .name = "hub-2", + .vendor = USB_ANY_ID, + .product = USB_ANY_ID, + .class = { + .class = USB_CLASS_HUB, + .subclass = 0, + .protocol = 1, + }, + }, +}; + +/** USB hub driver */ +struct usb_driver usb_hub_driver __usb_driver = { + .ids = hub_ids, + .id_count = ( sizeof ( hub_ids ) / sizeof ( hub_ids[0] ) ), + .probe = hub_probe, + .remove = hub_remove, +}; |