1de31213fSSimon Glass /* 2de31213fSSimon Glass * (C) Copyright 2015 Google, Inc 3de31213fSSimon Glass * Written by Simon Glass <sjg@chromium.org> 4de31213fSSimon Glass * 50566e240SSimon Glass * usb_match_device() modified from Linux kernel v4.0. 60566e240SSimon Glass * 7de31213fSSimon Glass * SPDX-License-Identifier: GPL-2.0+ 8de31213fSSimon Glass */ 9de31213fSSimon Glass 10de31213fSSimon Glass #include <common.h> 11de31213fSSimon Glass #include <dm.h> 12de31213fSSimon Glass #include <errno.h> 13de31213fSSimon Glass #include <usb.h> 14de31213fSSimon Glass #include <dm/device-internal.h> 15de31213fSSimon Glass #include <dm/lists.h> 16de31213fSSimon Glass #include <dm/root.h> 17de31213fSSimon Glass #include <dm/uclass-internal.h> 18de31213fSSimon Glass 19de31213fSSimon Glass DECLARE_GLOBAL_DATA_PTR; 20de31213fSSimon Glass 21de31213fSSimon Glass extern bool usb_started; /* flag for the started/stopped USB status */ 22de31213fSSimon Glass static bool asynch_allowed; 23de31213fSSimon Glass 24de31213fSSimon Glass int usb_disable_asynch(int disable) 25de31213fSSimon Glass { 26de31213fSSimon Glass int old_value = asynch_allowed; 27de31213fSSimon Glass 28de31213fSSimon Glass asynch_allowed = !disable; 29de31213fSSimon Glass return old_value; 30de31213fSSimon Glass } 31de31213fSSimon Glass 32de31213fSSimon Glass int submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer, 33de31213fSSimon Glass int length, int interval) 34de31213fSSimon Glass { 35de31213fSSimon Glass struct udevice *bus = udev->controller_dev; 36de31213fSSimon Glass struct dm_usb_ops *ops = usb_get_ops(bus); 37de31213fSSimon Glass 38de31213fSSimon Glass if (!ops->interrupt) 39de31213fSSimon Glass return -ENOSYS; 40de31213fSSimon Glass 41de31213fSSimon Glass return ops->interrupt(bus, udev, pipe, buffer, length, interval); 42de31213fSSimon Glass } 43de31213fSSimon Glass 44de31213fSSimon Glass int submit_control_msg(struct usb_device *udev, unsigned long pipe, 45de31213fSSimon Glass void *buffer, int length, struct devrequest *setup) 46de31213fSSimon Glass { 47de31213fSSimon Glass struct udevice *bus = udev->controller_dev; 48de31213fSSimon Glass struct dm_usb_ops *ops = usb_get_ops(bus); 49de31213fSSimon Glass 50de31213fSSimon Glass if (!ops->control) 51de31213fSSimon Glass return -ENOSYS; 52de31213fSSimon Glass 53de31213fSSimon Glass return ops->control(bus, udev, pipe, buffer, length, setup); 54de31213fSSimon Glass } 55de31213fSSimon Glass 56de31213fSSimon Glass int submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer, 57de31213fSSimon Glass int length) 58de31213fSSimon Glass { 59de31213fSSimon Glass struct udevice *bus = udev->controller_dev; 60de31213fSSimon Glass struct dm_usb_ops *ops = usb_get_ops(bus); 61de31213fSSimon Glass 62de31213fSSimon Glass if (!ops->bulk) 63de31213fSSimon Glass return -ENOSYS; 64de31213fSSimon Glass 65de31213fSSimon Glass return ops->bulk(bus, udev, pipe, buffer, length); 66de31213fSSimon Glass } 67de31213fSSimon Glass 68de31213fSSimon Glass int usb_alloc_device(struct usb_device *udev) 69de31213fSSimon Glass { 70de31213fSSimon Glass struct udevice *bus = udev->controller_dev; 71de31213fSSimon Glass struct dm_usb_ops *ops = usb_get_ops(bus); 72de31213fSSimon Glass 73de31213fSSimon Glass /* This is only requird by some controllers - current XHCI */ 74de31213fSSimon Glass if (!ops->alloc_device) 75de31213fSSimon Glass return 0; 76de31213fSSimon Glass 77de31213fSSimon Glass return ops->alloc_device(bus, udev); 78de31213fSSimon Glass } 79de31213fSSimon Glass 80de31213fSSimon Glass int usb_stop(void) 81de31213fSSimon Glass { 82de31213fSSimon Glass struct udevice *bus; 83de31213fSSimon Glass struct uclass *uc; 84de31213fSSimon Glass int err = 0, ret; 85de31213fSSimon Glass 86de31213fSSimon Glass /* De-activate any devices that have been activated */ 87de31213fSSimon Glass ret = uclass_get(UCLASS_USB, &uc); 88de31213fSSimon Glass if (ret) 89de31213fSSimon Glass return ret; 90de31213fSSimon Glass uclass_foreach_dev(bus, uc) { 91de31213fSSimon Glass ret = device_remove(bus); 92de31213fSSimon Glass if (ret && !err) 93de31213fSSimon Glass err = ret; 94de31213fSSimon Glass } 95de31213fSSimon Glass 96de31213fSSimon Glass usb_stor_reset(); 97de31213fSSimon Glass usb_hub_reset(); 98de31213fSSimon Glass usb_started = 0; 99de31213fSSimon Glass 100de31213fSSimon Glass return err; 101de31213fSSimon Glass } 102de31213fSSimon Glass 103de31213fSSimon Glass static int usb_scan_bus(struct udevice *bus, bool recurse) 104de31213fSSimon Glass { 105de31213fSSimon Glass struct usb_bus_priv *priv; 106de31213fSSimon Glass struct udevice *dev; 107de31213fSSimon Glass int ret; 108de31213fSSimon Glass 109de31213fSSimon Glass priv = dev_get_uclass_priv(bus); 110de31213fSSimon Glass 111de31213fSSimon Glass assert(recurse); /* TODO: Support non-recusive */ 112de31213fSSimon Glass 113de31213fSSimon Glass ret = usb_scan_device(bus, 0, USB_SPEED_FULL, &dev); 114de31213fSSimon Glass if (ret) 115de31213fSSimon Glass return ret; 116de31213fSSimon Glass 117de31213fSSimon Glass return priv->next_addr; 118de31213fSSimon Glass } 119de31213fSSimon Glass 120de31213fSSimon Glass int usb_init(void) 121de31213fSSimon Glass { 122de31213fSSimon Glass int controllers_initialized = 0; 123de31213fSSimon Glass struct udevice *bus; 124de31213fSSimon Glass struct uclass *uc; 125de31213fSSimon Glass int count = 0; 126de31213fSSimon Glass int ret; 127de31213fSSimon Glass 128de31213fSSimon Glass asynch_allowed = 1; 129de31213fSSimon Glass usb_hub_reset(); 130de31213fSSimon Glass 131de31213fSSimon Glass ret = uclass_get(UCLASS_USB, &uc); 132de31213fSSimon Glass if (ret) 133de31213fSSimon Glass return ret; 134de31213fSSimon Glass 135de31213fSSimon Glass uclass_foreach_dev(bus, uc) { 136de31213fSSimon Glass /* init low_level USB */ 137de31213fSSimon Glass count++; 138de31213fSSimon Glass printf("USB"); 139de31213fSSimon Glass printf("%d: ", bus->seq); 140de31213fSSimon Glass ret = device_probe(bus); 141de31213fSSimon Glass if (ret == -ENODEV) { /* No such device. */ 142de31213fSSimon Glass puts("Port not available.\n"); 143de31213fSSimon Glass controllers_initialized++; 144de31213fSSimon Glass continue; 145de31213fSSimon Glass } 146de31213fSSimon Glass 147de31213fSSimon Glass if (ret) { /* Other error. */ 148de31213fSSimon Glass printf("probe failed, error %d\n", ret); 149de31213fSSimon Glass continue; 150de31213fSSimon Glass } 151de31213fSSimon Glass /* 152de31213fSSimon Glass * lowlevel init is OK, now scan the bus for devices 153de31213fSSimon Glass * i.e. search HUBs and configure them 154de31213fSSimon Glass */ 155de31213fSSimon Glass controllers_initialized++; 156de31213fSSimon Glass printf("scanning bus %d for devices... ", bus->seq); 157de31213fSSimon Glass debug("\n"); 158de31213fSSimon Glass ret = usb_scan_bus(bus, true); 159de31213fSSimon Glass if (ret < 0) 160de31213fSSimon Glass printf("failed, error %d\n", ret); 161de31213fSSimon Glass else if (!ret) 162de31213fSSimon Glass printf("No USB Device found\n"); 163de31213fSSimon Glass else 164de31213fSSimon Glass printf("%d USB Device(s) found\n", ret); 165de31213fSSimon Glass usb_started = true; 166de31213fSSimon Glass } 167de31213fSSimon Glass 168de31213fSSimon Glass debug("scan end\n"); 169de31213fSSimon Glass /* if we were not able to find at least one working bus, bail out */ 170de31213fSSimon Glass if (!count) 171de31213fSSimon Glass printf("No controllers found\n"); 172de31213fSSimon Glass else if (controllers_initialized == 0) 173de31213fSSimon Glass printf("USB error: all controllers failed lowlevel init\n"); 174de31213fSSimon Glass 175de31213fSSimon Glass return usb_started ? 0 : -1; 176de31213fSSimon Glass } 177de31213fSSimon Glass 178de31213fSSimon Glass int usb_reset_root_port(void) 179de31213fSSimon Glass { 180de31213fSSimon Glass return -ENOSYS; 181de31213fSSimon Glass } 182de31213fSSimon Glass 183de31213fSSimon Glass static struct usb_device *find_child_devnum(struct udevice *parent, int devnum) 184de31213fSSimon Glass { 185de31213fSSimon Glass struct usb_device *udev; 186de31213fSSimon Glass struct udevice *dev; 187de31213fSSimon Glass 188de31213fSSimon Glass if (!device_active(parent)) 189de31213fSSimon Glass return NULL; 190de31213fSSimon Glass udev = dev_get_parentdata(parent); 191de31213fSSimon Glass if (udev->devnum == devnum) 192de31213fSSimon Glass return udev; 193de31213fSSimon Glass 194de31213fSSimon Glass for (device_find_first_child(parent, &dev); 195de31213fSSimon Glass dev; 196de31213fSSimon Glass device_find_next_child(&dev)) { 197de31213fSSimon Glass udev = find_child_devnum(dev, devnum); 198de31213fSSimon Glass if (udev) 199de31213fSSimon Glass return udev; 200de31213fSSimon Glass } 201de31213fSSimon Glass 202de31213fSSimon Glass return NULL; 203de31213fSSimon Glass } 204de31213fSSimon Glass 205de31213fSSimon Glass struct usb_device *usb_get_dev_index(struct udevice *bus, int index) 206de31213fSSimon Glass { 207de31213fSSimon Glass struct udevice *hub; 208de31213fSSimon Glass int devnum = index + 1; /* Addresses are allocated from 1 on USB */ 209de31213fSSimon Glass 210de31213fSSimon Glass device_find_first_child(bus, &hub); 211de31213fSSimon Glass if (device_get_uclass_id(hub) == UCLASS_USB_HUB) 212de31213fSSimon Glass return find_child_devnum(hub, devnum); 213de31213fSSimon Glass 214de31213fSSimon Glass return NULL; 215de31213fSSimon Glass } 216de31213fSSimon Glass 217de31213fSSimon Glass int usb_post_bind(struct udevice *dev) 218de31213fSSimon Glass { 219de31213fSSimon Glass /* Scan the bus for devices */ 220de31213fSSimon Glass return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false); 221de31213fSSimon Glass } 222de31213fSSimon Glass 223de31213fSSimon Glass int usb_port_reset(struct usb_device *parent, int portnr) 224de31213fSSimon Glass { 225de31213fSSimon Glass unsigned short portstatus; 226de31213fSSimon Glass int ret; 227de31213fSSimon Glass 228de31213fSSimon Glass debug("%s: start\n", __func__); 229de31213fSSimon Glass 230de31213fSSimon Glass if (parent) { 231de31213fSSimon Glass /* reset the port for the second time */ 232de31213fSSimon Glass assert(portnr > 0); 233de31213fSSimon Glass debug("%s: reset %d\n", __func__, portnr - 1); 234de31213fSSimon Glass ret = legacy_hub_port_reset(parent, portnr - 1, &portstatus); 235de31213fSSimon Glass if (ret < 0) { 236de31213fSSimon Glass printf("\n Couldn't reset port %i\n", portnr); 237de31213fSSimon Glass return ret; 238de31213fSSimon Glass } 239de31213fSSimon Glass } else { 240de31213fSSimon Glass debug("%s: reset root\n", __func__); 241de31213fSSimon Glass usb_reset_root_port(); 242de31213fSSimon Glass } 243de31213fSSimon Glass 244de31213fSSimon Glass return 0; 245de31213fSSimon Glass } 246de31213fSSimon Glass 247de31213fSSimon Glass int usb_legacy_port_reset(struct usb_device *parent, int portnr) 248de31213fSSimon Glass { 249de31213fSSimon Glass return usb_port_reset(parent, portnr); 250de31213fSSimon Glass } 251de31213fSSimon Glass 2520566e240SSimon Glass /* returns 0 if no match, 1 if match */ 2530566e240SSimon Glass int usb_match_device(const struct usb_device_descriptor *desc, 2540566e240SSimon Glass const struct usb_device_id *id) 2550566e240SSimon Glass { 2560566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && 2570566e240SSimon Glass id->idVendor != le16_to_cpu(desc->idVendor)) 2580566e240SSimon Glass return 0; 2590566e240SSimon Glass 2600566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) && 2610566e240SSimon Glass id->idProduct != le16_to_cpu(desc->idProduct)) 2620566e240SSimon Glass return 0; 2630566e240SSimon Glass 2640566e240SSimon Glass /* No need to test id->bcdDevice_lo != 0, since 0 is never 2650566e240SSimon Glass greater than any unsigned number. */ 2660566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) && 2670566e240SSimon Glass (id->bcdDevice_lo > le16_to_cpu(desc->bcdDevice))) 2680566e240SSimon Glass return 0; 2690566e240SSimon Glass 2700566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) && 2710566e240SSimon Glass (id->bcdDevice_hi < le16_to_cpu(desc->bcdDevice))) 2720566e240SSimon Glass return 0; 2730566e240SSimon Glass 2740566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) && 2750566e240SSimon Glass (id->bDeviceClass != desc->bDeviceClass)) 2760566e240SSimon Glass return 0; 2770566e240SSimon Glass 2780566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) && 2790566e240SSimon Glass (id->bDeviceSubClass != desc->bDeviceSubClass)) 2800566e240SSimon Glass return 0; 2810566e240SSimon Glass 2820566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) && 2830566e240SSimon Glass (id->bDeviceProtocol != desc->bDeviceProtocol)) 2840566e240SSimon Glass return 0; 2850566e240SSimon Glass 2860566e240SSimon Glass return 1; 2870566e240SSimon Glass } 2880566e240SSimon Glass 2890566e240SSimon Glass /* returns 0 if no match, 1 if match */ 2900566e240SSimon Glass int usb_match_one_id_intf(const struct usb_device_descriptor *desc, 2910566e240SSimon Glass const struct usb_interface_descriptor *int_desc, 2920566e240SSimon Glass const struct usb_device_id *id) 2930566e240SSimon Glass { 2940566e240SSimon Glass /* The interface class, subclass, protocol and number should never be 2950566e240SSimon Glass * checked for a match if the device class is Vendor Specific, 2960566e240SSimon Glass * unless the match record specifies the Vendor ID. */ 2970566e240SSimon Glass if (desc->bDeviceClass == USB_CLASS_VENDOR_SPEC && 2980566e240SSimon Glass !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && 2990566e240SSimon Glass (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS | 3000566e240SSimon Glass USB_DEVICE_ID_MATCH_INT_SUBCLASS | 3010566e240SSimon Glass USB_DEVICE_ID_MATCH_INT_PROTOCOL | 3020566e240SSimon Glass USB_DEVICE_ID_MATCH_INT_NUMBER))) 3030566e240SSimon Glass return 0; 3040566e240SSimon Glass 3050566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) && 3060566e240SSimon Glass (id->bInterfaceClass != int_desc->bInterfaceClass)) 3070566e240SSimon Glass return 0; 3080566e240SSimon Glass 3090566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) && 3100566e240SSimon Glass (id->bInterfaceSubClass != int_desc->bInterfaceSubClass)) 3110566e240SSimon Glass return 0; 3120566e240SSimon Glass 3130566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) && 3140566e240SSimon Glass (id->bInterfaceProtocol != int_desc->bInterfaceProtocol)) 3150566e240SSimon Glass return 0; 3160566e240SSimon Glass 3170566e240SSimon Glass if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) && 3180566e240SSimon Glass (id->bInterfaceNumber != int_desc->bInterfaceNumber)) 3190566e240SSimon Glass return 0; 3200566e240SSimon Glass 3210566e240SSimon Glass return 1; 3220566e240SSimon Glass } 3230566e240SSimon Glass 3240566e240SSimon Glass /* returns 0 if no match, 1 if match */ 3250566e240SSimon Glass int usb_match_one_id(struct usb_device_descriptor *desc, 3260566e240SSimon Glass struct usb_interface_descriptor *int_desc, 3270566e240SSimon Glass const struct usb_device_id *id) 3280566e240SSimon Glass { 3290566e240SSimon Glass if (!usb_match_device(desc, id)) 3300566e240SSimon Glass return 0; 3310566e240SSimon Glass 3320566e240SSimon Glass return usb_match_one_id_intf(desc, int_desc, id); 3330566e240SSimon Glass } 3340566e240SSimon Glass 3350566e240SSimon Glass /** 3360566e240SSimon Glass * usb_find_and_bind_driver() - Find and bind the right USB driver 3370566e240SSimon Glass * 3380566e240SSimon Glass * This only looks at certain fields in the descriptor. 3390566e240SSimon Glass */ 3400566e240SSimon Glass static int usb_find_and_bind_driver(struct udevice *parent, 3410566e240SSimon Glass struct usb_device_descriptor *desc, 3420566e240SSimon Glass struct usb_interface_descriptor *iface, 3430566e240SSimon Glass int bus_seq, int devnum, 3440566e240SSimon Glass struct udevice **devp) 3450566e240SSimon Glass { 3460566e240SSimon Glass struct usb_driver_entry *start, *entry; 3470566e240SSimon Glass int n_ents; 3480566e240SSimon Glass int ret; 3490566e240SSimon Glass char name[30], *str; 3500566e240SSimon Glass 3510566e240SSimon Glass *devp = NULL; 3520566e240SSimon Glass debug("%s: Searching for driver\n", __func__); 3530566e240SSimon Glass start = ll_entry_start(struct usb_driver_entry, usb_driver_entry); 3540566e240SSimon Glass n_ents = ll_entry_count(struct usb_driver_entry, usb_driver_entry); 3550566e240SSimon Glass for (entry = start; entry != start + n_ents; entry++) { 3560566e240SSimon Glass const struct usb_device_id *id; 3570566e240SSimon Glass struct udevice *dev; 3580566e240SSimon Glass const struct driver *drv; 3590566e240SSimon Glass struct usb_dev_platdata *plat; 3600566e240SSimon Glass 3610566e240SSimon Glass for (id = entry->match; id->match_flags; id++) { 3620566e240SSimon Glass if (!usb_match_one_id(desc, iface, id)) 3630566e240SSimon Glass continue; 3640566e240SSimon Glass 3650566e240SSimon Glass drv = entry->driver; 3660566e240SSimon Glass /* 3670566e240SSimon Glass * We could pass the descriptor to the driver as 3680566e240SSimon Glass * platdata (instead of NULL) and allow its bind() 3690566e240SSimon Glass * method to return -ENOENT if it doesn't support this 3700566e240SSimon Glass * device. That way we could continue the search to 3710566e240SSimon Glass * find another driver. For now this doesn't seem 3720566e240SSimon Glass * necesssary, so just bind the first match. 3730566e240SSimon Glass */ 3740566e240SSimon Glass ret = device_bind(parent, drv, drv->name, NULL, -1, 3750566e240SSimon Glass &dev); 3760566e240SSimon Glass if (ret) 3770566e240SSimon Glass goto error; 3780566e240SSimon Glass debug("%s: Match found: %s\n", __func__, drv->name); 3790566e240SSimon Glass dev->driver_data = id->driver_info; 3800566e240SSimon Glass plat = dev_get_parent_platdata(dev); 3810566e240SSimon Glass plat->id = *id; 3820566e240SSimon Glass *devp = dev; 3830566e240SSimon Glass return 0; 3840566e240SSimon Glass } 3850566e240SSimon Glass } 3860566e240SSimon Glass 387*449230f0SSimon Glass /* Bind a generic driver so that the device can be used */ 388*449230f0SSimon Glass snprintf(name, sizeof(name), "generic_bus_%x_dev_%x", bus_seq, devnum); 389*449230f0SSimon Glass str = strdup(name); 390*449230f0SSimon Glass if (!str) 391*449230f0SSimon Glass return -ENOMEM; 392*449230f0SSimon Glass ret = device_bind_driver(parent, "usb_dev_generic_drv", str, devp); 393*449230f0SSimon Glass 3940566e240SSimon Glass error: 3950566e240SSimon Glass debug("%s: No match found: %d\n", __func__, ret); 3960566e240SSimon Glass return ret; 3970566e240SSimon Glass } 3980566e240SSimon Glass 3990566e240SSimon Glass /** 4000566e240SSimon Glass * usb_find_child() - Find an existing device which matches our needs 4010566e240SSimon Glass * 4020566e240SSimon Glass * 4030566e240SSimon Glass */ 4040566e240SSimon Glass static int usb_find_child(struct udevice *parent, 4050566e240SSimon Glass struct usb_device_descriptor *desc, 4060566e240SSimon Glass struct usb_interface_descriptor *iface, 4070566e240SSimon Glass struct udevice **devp) 4080566e240SSimon Glass { 4090566e240SSimon Glass struct udevice *dev; 4100566e240SSimon Glass 4110566e240SSimon Glass *devp = NULL; 4120566e240SSimon Glass for (device_find_first_child(parent, &dev); 4130566e240SSimon Glass dev; 4140566e240SSimon Glass device_find_next_child(&dev)) { 4150566e240SSimon Glass struct usb_dev_platdata *plat = dev_get_parent_platdata(dev); 4160566e240SSimon Glass 4170566e240SSimon Glass /* If this device is already in use, skip it */ 4180566e240SSimon Glass if (device_active(dev)) 4190566e240SSimon Glass continue; 4200566e240SSimon Glass debug(" %s: name='%s', plat=%d, desc=%d\n", __func__, 4210566e240SSimon Glass dev->name, plat->id.bDeviceClass, desc->bDeviceClass); 4220566e240SSimon Glass if (usb_match_one_id(desc, iface, &plat->id)) { 4230566e240SSimon Glass *devp = dev; 4240566e240SSimon Glass return 0; 4250566e240SSimon Glass } 4260566e240SSimon Glass } 4270566e240SSimon Glass 4280566e240SSimon Glass return -ENOENT; 4290566e240SSimon Glass } 4300566e240SSimon Glass 431de31213fSSimon Glass int usb_scan_device(struct udevice *parent, int port, 432de31213fSSimon Glass enum usb_device_speed speed, struct udevice **devp) 433de31213fSSimon Glass { 434de31213fSSimon Glass struct udevice *dev; 435de31213fSSimon Glass bool created = false; 436de31213fSSimon Glass struct usb_dev_platdata *plat; 437de31213fSSimon Glass struct usb_bus_priv *priv; 438de31213fSSimon Glass struct usb_device *parent_udev; 439de31213fSSimon Glass int ret; 440de31213fSSimon Glass ALLOC_CACHE_ALIGN_BUFFER(struct usb_device, udev, 1); 441de31213fSSimon Glass struct usb_interface_descriptor *iface = &udev->config.if_desc[0].desc; 442de31213fSSimon Glass 443de31213fSSimon Glass *devp = NULL; 444de31213fSSimon Glass memset(udev, '\0', sizeof(*udev)); 445de31213fSSimon Glass ret = usb_get_bus(parent, &udev->controller_dev); 446de31213fSSimon Glass if (ret) 447de31213fSSimon Glass return ret; 448de31213fSSimon Glass priv = dev_get_uclass_priv(udev->controller_dev); 449de31213fSSimon Glass 450de31213fSSimon Glass /* 451de31213fSSimon Glass * Somewhat nasty, this. We create a local device and use the normal 452de31213fSSimon Glass * USB stack to read its descriptor. Then we know what type of device 453de31213fSSimon Glass * to create for real. 454de31213fSSimon Glass * 455de31213fSSimon Glass * udev->dev is set to the parent, since we don't have a real device 456de31213fSSimon Glass * yet. The USB stack should not access udev.dev anyway, except perhaps 457de31213fSSimon Glass * to find the controller, and the controller will either be @parent, 458de31213fSSimon Glass * or some parent of @parent. 459de31213fSSimon Glass * 460de31213fSSimon Glass * Another option might be to create the device as a generic USB 461de31213fSSimon Glass * device, then morph it into the correct one when we know what it 462de31213fSSimon Glass * should be. This means that a generic USB device would morph into 463de31213fSSimon Glass * a network controller, or a USB flash stick, for example. However, 464de31213fSSimon Glass * we don't support such morphing and it isn't clear that it would 465de31213fSSimon Glass * be easy to do. 466de31213fSSimon Glass * 467de31213fSSimon Glass * Yet another option is to split out the USB stack parts of udev 468de31213fSSimon Glass * into something like a 'struct urb' (as Linux does) which can exist 469de31213fSSimon Glass * independently of any device. This feels cleaner, but calls for quite 470de31213fSSimon Glass * a big change to the USB stack. 471de31213fSSimon Glass * 472de31213fSSimon Glass * For now, the approach is to set up an empty udev, read its 473de31213fSSimon Glass * descriptor and assign it an address, then bind a real device and 474de31213fSSimon Glass * stash the resulting information into the device's parent 475de31213fSSimon Glass * platform data. Then when we probe it, usb_child_pre_probe() is called 476de31213fSSimon Glass * and it will pull the information out of the stash. 477de31213fSSimon Glass */ 478de31213fSSimon Glass udev->dev = parent; 479de31213fSSimon Glass udev->speed = speed; 480de31213fSSimon Glass udev->devnum = priv->next_addr + 1; 481de31213fSSimon Glass udev->portnr = port; 482de31213fSSimon Glass debug("Calling usb_setup_device(), portnr=%d\n", udev->portnr); 483de31213fSSimon Glass parent_udev = device_get_uclass_id(parent) == UCLASS_USB_HUB ? 484de31213fSSimon Glass dev_get_parentdata(parent) : NULL; 485de31213fSSimon Glass ret = usb_setup_device(udev, priv->desc_before_addr, parent_udev, port); 486de31213fSSimon Glass debug("read_descriptor for '%s': ret=%d\n", parent->name, ret); 487de31213fSSimon Glass if (ret) 488de31213fSSimon Glass return ret; 489de31213fSSimon Glass ret = usb_find_child(parent, &udev->descriptor, iface, &dev); 490de31213fSSimon Glass debug("** usb_find_child returns %d\n", ret); 4910566e240SSimon Glass if (ret) { 4920566e240SSimon Glass if (ret != -ENOENT) 4930566e240SSimon Glass return ret; 4940566e240SSimon Glass ret = usb_find_and_bind_driver(parent, &udev->descriptor, iface, 4950566e240SSimon Glass udev->controller_dev->seq, 4960566e240SSimon Glass udev->devnum, &dev); 4970566e240SSimon Glass if (ret) 4980566e240SSimon Glass return ret; 4990566e240SSimon Glass created = true; 5000566e240SSimon Glass } 5010566e240SSimon Glass plat = dev_get_parent_platdata(dev); 5020566e240SSimon Glass debug("%s: Probing '%s', plat=%p\n", __func__, dev->name, plat); 5030566e240SSimon Glass plat->devnum = udev->devnum; 5040566e240SSimon Glass plat->speed = udev->speed; 5050566e240SSimon Glass plat->slot_id = udev->slot_id; 5060566e240SSimon Glass plat->portnr = port; 5070566e240SSimon Glass debug("** device '%s': stashing slot_id=%d\n", dev->name, 5080566e240SSimon Glass plat->slot_id); 5090566e240SSimon Glass priv->next_addr++; 5100566e240SSimon Glass ret = device_probe(dev); 5110566e240SSimon Glass if (ret) { 5120566e240SSimon Glass debug("%s: Device '%s' probe failed\n", __func__, dev->name); 5130566e240SSimon Glass priv->next_addr--; 5140566e240SSimon Glass if (created) 5150566e240SSimon Glass device_unbind(dev); 5160566e240SSimon Glass return ret; 5170566e240SSimon Glass } 5180566e240SSimon Glass *devp = dev; 519de31213fSSimon Glass 5200566e240SSimon Glass return 0; 521de31213fSSimon Glass } 522de31213fSSimon Glass 523de31213fSSimon Glass int usb_child_post_bind(struct udevice *dev) 524de31213fSSimon Glass { 525de31213fSSimon Glass struct usb_dev_platdata *plat = dev_get_parent_platdata(dev); 526de31213fSSimon Glass const void *blob = gd->fdt_blob; 527de31213fSSimon Glass int val; 528de31213fSSimon Glass 529de31213fSSimon Glass if (dev->of_offset == -1) 530de31213fSSimon Glass return 0; 531de31213fSSimon Glass 532de31213fSSimon Glass /* We only support matching a few things */ 533de31213fSSimon Glass val = fdtdec_get_int(blob, dev->of_offset, "usb,device-class", -1); 534de31213fSSimon Glass if (val != -1) { 535de31213fSSimon Glass plat->id.match_flags |= USB_DEVICE_ID_MATCH_DEV_CLASS; 536de31213fSSimon Glass plat->id.bDeviceClass = val; 537de31213fSSimon Glass } 538de31213fSSimon Glass val = fdtdec_get_int(blob, dev->of_offset, "usb,interface-class", -1); 539de31213fSSimon Glass if (val != -1) { 540de31213fSSimon Glass plat->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS; 541de31213fSSimon Glass plat->id.bInterfaceClass = val; 542de31213fSSimon Glass } 543de31213fSSimon Glass 544de31213fSSimon Glass return 0; 545de31213fSSimon Glass } 546de31213fSSimon Glass 547de31213fSSimon Glass int usb_get_bus(struct udevice *dev, struct udevice **busp) 548de31213fSSimon Glass { 549de31213fSSimon Glass struct udevice *bus; 550de31213fSSimon Glass 551de31213fSSimon Glass *busp = NULL; 552de31213fSSimon Glass for (bus = dev; bus && device_get_uclass_id(bus) != UCLASS_USB; ) 553de31213fSSimon Glass bus = bus->parent; 554de31213fSSimon Glass if (!bus) { 555de31213fSSimon Glass /* By design this cannot happen */ 556de31213fSSimon Glass assert(bus); 557de31213fSSimon Glass debug("USB HUB '%s' does not have a controller\n", dev->name); 558de31213fSSimon Glass return -EXDEV; 559de31213fSSimon Glass } 560de31213fSSimon Glass *busp = bus; 561de31213fSSimon Glass 562de31213fSSimon Glass return 0; 563de31213fSSimon Glass } 564de31213fSSimon Glass 565de31213fSSimon Glass int usb_child_pre_probe(struct udevice *dev) 566de31213fSSimon Glass { 567de31213fSSimon Glass struct udevice *bus; 568de31213fSSimon Glass struct usb_device *udev = dev_get_parentdata(dev); 569de31213fSSimon Glass struct usb_dev_platdata *plat = dev_get_parent_platdata(dev); 570de31213fSSimon Glass int ret; 571de31213fSSimon Glass 572de31213fSSimon Glass ret = usb_get_bus(dev, &bus); 573de31213fSSimon Glass if (ret) 574de31213fSSimon Glass return ret; 575de31213fSSimon Glass udev->controller_dev = bus; 576de31213fSSimon Glass udev->dev = dev; 577de31213fSSimon Glass udev->devnum = plat->devnum; 578de31213fSSimon Glass udev->slot_id = plat->slot_id; 579de31213fSSimon Glass udev->portnr = plat->portnr; 580de31213fSSimon Glass udev->speed = plat->speed; 581de31213fSSimon Glass debug("** device '%s': getting slot_id=%d\n", dev->name, plat->slot_id); 582de31213fSSimon Glass 583de31213fSSimon Glass ret = usb_select_config(udev); 584de31213fSSimon Glass if (ret) 585de31213fSSimon Glass return ret; 586de31213fSSimon Glass 587de31213fSSimon Glass return 0; 588de31213fSSimon Glass } 589de31213fSSimon Glass 590de31213fSSimon Glass UCLASS_DRIVER(usb) = { 591de31213fSSimon Glass .id = UCLASS_USB, 592de31213fSSimon Glass .name = "usb", 593de31213fSSimon Glass .flags = DM_UC_FLAG_SEQ_ALIAS, 594de31213fSSimon Glass .post_bind = usb_post_bind, 595de31213fSSimon Glass .per_child_auto_alloc_size = sizeof(struct usb_device), 596de31213fSSimon Glass .per_device_auto_alloc_size = sizeof(struct usb_bus_priv), 597de31213fSSimon Glass .child_post_bind = usb_child_post_bind, 598de31213fSSimon Glass .child_pre_probe = usb_child_pre_probe, 599de31213fSSimon Glass .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata), 600de31213fSSimon Glass }; 601*449230f0SSimon Glass 602*449230f0SSimon Glass UCLASS_DRIVER(usb_dev_generic) = { 603*449230f0SSimon Glass .id = UCLASS_USB_DEV_GENERIC, 604*449230f0SSimon Glass .name = "usb_dev_generic", 605*449230f0SSimon Glass }; 606*449230f0SSimon Glass 607*449230f0SSimon Glass U_BOOT_DRIVER(usb_dev_generic_drv) = { 608*449230f0SSimon Glass .id = UCLASS_USB_DEV_GENERIC, 609*449230f0SSimon Glass .name = "usb_dev_generic_drv", 610*449230f0SSimon Glass }; 611