/* * * Most of this source has been derived from the Linux USB * project: * (C) Copyright Linus Torvalds 1999 * (C) Copyright Johannes Erdfelt 1999-2001 * (C) Copyright Andreas Gal 1999 * (C) Copyright Gregory P. Smith 1999 * (C) Copyright Deti Fliegl 1999 (new USB architecture) * (C) Copyright Randy Dunlap 2000 * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id) * (C) Copyright Yggdrasil Computing, Inc. 2000 * (usb_device_id matching changes by Adam J. Richter) * * Adapted for U-Boot: * (C) Copyright 2001 Denis Peter, MPL AG Switzerland * * See file CREDITS for list of people who contributed to this * project. * * 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., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * */ /* * How it works: * * Since this is a bootloader, the devices will not be automatic * (re)configured on hotplug, but after a restart of the USB the * device should work. * * For each transfer (except "Interrupt") we wait for completion. */ #include <common.h> #include <command.h> #include <asm/processor.h> #include <linux/ctype.h> #include <asm/byteorder.h> #include <usb.h> #ifdef CONFIG_4xx #include <asm/4xx_pci.h> #endif #undef USB_DEBUG #ifdef USB_DEBUG #define USB_PRINTF(fmt, args...) printf(fmt , ##args) #else #define USB_PRINTF(fmt, args...) #endif #define USB_BUFSIZ 512 static struct usb_device usb_dev[USB_MAX_DEVICE]; static int dev_index; static int running; static int asynch_allowed; static struct devrequest setup_packet; char usb_started; /* flag for the started/stopped USB status */ /********************************************************************** * some forward declerations... */ void usb_scan_devices(void); int usb_hub_probe(struct usb_device *dev, int ifnum); void usb_hub_reset(void); static int hub_port_reset(struct usb_device *dev, int port, unsigned short *portstat); /*********************************************************************** * wait_ms */ inline void wait_ms(unsigned long ms) { while (ms-- > 0) udelay(1000); } /*************************************************************************** * Init USB Device */ int usb_init(void) { int result; running = 0; dev_index = 0; asynch_allowed = 1; usb_hub_reset(); /* init low_level USB */ printf("USB: "); result = usb_lowlevel_init(); /* if lowlevel init is OK, scan the bus for devices * i.e. search HUBs and configure them */ if (result == 0) { printf("scanning bus for devices... "); running = 1; usb_scan_devices(); usb_started = 1; return 0; } else { printf("Error, couldn't init Lowlevel part\n"); usb_started = 0; return -1; } } /****************************************************************************** * Stop USB this stops the LowLevel Part and deregisters USB devices. */ int usb_stop(void) { int res = 0; if (usb_started) { asynch_allowed = 1; usb_started = 0; usb_hub_reset(); res = usb_lowlevel_stop(); } return res; } /* * disables the asynch behaviour of the control message. This is used for data * transfers that uses the exclusiv access to the control and bulk messages. */ void usb_disable_asynch(int disable) { asynch_allowed = !disable; } /*------------------------------------------------------------------- * Message wrappers. * */ /* * submits an Interrupt Message */ int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len, int interval) { return submit_int_msg(dev, pipe, buffer, transfer_len, interval); } /* * submits a control message and waits for comletion (at least timeout * 1ms) * If timeout is 0, we don't wait for completion (used as example to set and * clear keyboards LEDs). For data transfers, (storage transfers) we don't * allow control messages with 0 timeout, by previousely resetting the flag * asynch_allowed (usb_disable_asynch(1)). * returns the transfered length if OK or -1 if error. The transfered length * and the current status are stored in the dev->act_len and dev->status. */ int usb_control_msg(struct usb_device *dev, unsigned int pipe, unsigned char request, unsigned char requesttype, unsigned short value, unsigned short index, void *data, unsigned short size, int timeout) { if ((timeout == 0) && (!asynch_allowed)) { /* request for a asynch control pipe is not allowed */ return -1; } /* set setup command */ setup_packet.requesttype = requesttype; setup_packet.request = request; setup_packet.value = cpu_to_le16(value); setup_packet.index = cpu_to_le16(index); setup_packet.length = cpu_to_le16(size); USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \ "value 0x%X index 0x%X length 0x%X\n", request, requesttype, value, index, size); dev->status = USB_ST_NOT_PROC; /*not yet processed */ submit_control_msg(dev, pipe, data, size, &setup_packet); if (timeout == 0) return (int)size; if (dev->status != 0) { /* * Let's wait a while for the timeout to elapse. * It has no real use, but it keeps the interface happy. */ wait_ms(timeout); return -1; } return dev->act_len; } /*------------------------------------------------------------------- * submits bulk message, and waits for completion. returns 0 if Ok or * -1 if Error. * synchronous behavior */ int usb_bulk_msg(struct usb_device *dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout) { if (len < 0) return -1; dev->status = USB_ST_NOT_PROC; /*not yet processed */ submit_bulk_msg(dev, pipe, data, len); while (timeout--) { if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) break; wait_ms(1); } *actual_length = dev->act_len; if (dev->status == 0) return 0; else return -1; } /*------------------------------------------------------------------- * Max Packet stuff */ /* * returns the max packet size, depending on the pipe direction and * the configurations values */ int usb_maxpacket(struct usb_device *dev, unsigned long pipe) { /* direction is out -> use emaxpacket out */ if ((pipe & USB_DIR_IN) == 0) return dev->epmaxpacketout[((pipe>>15) & 0xf)]; else return dev->epmaxpacketin[((pipe>>15) & 0xf)]; } /* The routine usb_set_maxpacket_ep() is extracted from the loop of routine * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine * when it is inlined in 1 single routine. What happens is that the register r3 * is used as loop-count 'i', but gets overwritten later on. * This is clearly a compiler bug, but it is easier to workaround it here than * to update the compiler (Occurs with at least several GCC 4.{1,2},x * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM) */ static void __attribute__((noinline)) usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep) { int b; b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_CONTROL) { /* Control => bidirectional */ dev->epmaxpacketout[b] = ep->wMaxPacketSize; dev->epmaxpacketin[b] = ep->wMaxPacketSize; USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n", b, dev->epmaxpacketin[b]); } else { if ((ep->bEndpointAddress & 0x80) == 0) { /* OUT Endpoint */ if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) { dev->epmaxpacketout[b] = ep->wMaxPacketSize; USB_PRINTF("##EP epmaxpacketout[%d] = %d\n", b, dev->epmaxpacketout[b]); } } else { /* IN Endpoint */ if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) { dev->epmaxpacketin[b] = ep->wMaxPacketSize; USB_PRINTF("##EP epmaxpacketin[%d] = %d\n", b, dev->epmaxpacketin[b]); } } /* if out */ } /* if control */ } /* * set the max packed value of all endpoints in the given configuration */ int usb_set_maxpacket(struct usb_device *dev) { int i, ii; for (i = 0; i < dev->config.bNumInterfaces; i++) for (ii = 0; ii < dev->config.if_desc[i].bNumEndpoints; ii++) usb_set_maxpacket_ep(dev, &dev->config.if_desc[i].ep_desc[ii]); return 0; } /******************************************************************************* * Parse the config, located in buffer, and fills the dev->config structure. * Note that all little/big endian swapping are done automatically. */ int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno) { struct usb_descriptor_header *head; int index, ifno, epno, curr_if_num; int i; unsigned char *ch; ifno = -1; epno = -1; curr_if_num = -1; dev->configno = cfgno; head = (struct usb_descriptor_header *) &buffer[0]; if (head->bDescriptorType != USB_DT_CONFIG) { printf(" ERROR: NOT USB_CONFIG_DESC %x\n", head->bDescriptorType); return -1; } memcpy(&dev->config, buffer, buffer[0]); le16_to_cpus(&(dev->config.wTotalLength)); dev->config.no_of_if = 0; index = dev->config.bLength; /* Ok the first entry must be a configuration entry, * now process the others */ head = (struct usb_descriptor_header *) &buffer[index]; while (index + 1 < dev->config.wTotalLength) { switch (head->bDescriptorType) { case USB_DT_INTERFACE: if (((struct usb_interface_descriptor *) \ &buffer[index])->bInterfaceNumber != curr_if_num) { /* this is a new interface, copy new desc */ ifno = dev->config.no_of_if; dev->config.no_of_if++; memcpy(&dev->config.if_desc[ifno], &buffer[index], buffer[index]); dev->config.if_desc[ifno].no_of_ep = 0; dev->config.if_desc[ifno].num_altsetting = 1; curr_if_num = dev->config.if_desc[ifno].bInterfaceNumber; } else { /* found alternate setting for the interface */ dev->config.if_desc[ifno].num_altsetting++; } break; case USB_DT_ENDPOINT: epno = dev->config.if_desc[ifno].no_of_ep; /* found an endpoint */ dev->config.if_desc[ifno].no_of_ep++; memcpy(&dev->config.if_desc[ifno].ep_desc[epno], &buffer[index], buffer[index]); le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\ wMaxPacketSize)); USB_PRINTF("if %d, ep %d\n", ifno, epno); break; default: if (head->bLength == 0) return 1; USB_PRINTF("unknown Description Type : %x\n", head->bDescriptorType); { ch = (unsigned char *)head; for (i = 0; i < head->bLength; i++) USB_PRINTF("%02X ", *ch++); USB_PRINTF("\n\n\n"); } break; } index += head->bLength; head = (struct usb_descriptor_header *)&buffer[index]; } return 1; } /*********************************************************************** * Clears an endpoint * endp: endpoint number in bits 0-3; * direction flag in bit 7 (1 = IN, 0 = OUT) */ int usb_clear_halt(struct usb_device *dev, int pipe) { int result; int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7); result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3); /* don't clear if failed */ if (result < 0) return result; /* * NOTE: we do not get status and verify reset was successful * as some devices are reported to lock up upon this check.. */ usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)); /* toggle is reset on clear */ usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0); return 0; } /********************************************************************** * get_descriptor type */ int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size) { int res; res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, (type << 8) + index, 0, buf, size, USB_CNTL_TIMEOUT); return res; } /********************************************************************** * gets configuration cfgno and store it in the buffer */ int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer, int cfgno) { int result; unsigned int tmp; struct usb_config_descriptor *config; config = (struct usb_config_descriptor *)&buffer[0]; result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9); if (result < 9) { if (result < 0) printf("unable to get descriptor, error %lX\n", dev->status); else printf("config descriptor too short " \ "(expected %i, got %i)\n", 9, result); return -1; } tmp = le16_to_cpu(config->wTotalLength); if (tmp > USB_BUFSIZ) { USB_PRINTF("usb_get_configuration_no: failed to get " \ "descriptor - too long: %d\n", tmp); return -1; } result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp); USB_PRINTF("get_conf_no %d Result %d, wLength %d\n", cfgno, result, tmp); return result; } /******************************************************************** * set address of a device to the value in dev->devnum. * This can only be done by addressing the device via the default address (0) */ int usb_set_address(struct usb_device *dev) { int res; USB_PRINTF("set address %d\n", dev->devnum); res = usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS, 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT); return res; } /******************************************************************** * set interface number to interface */ int usb_set_interface(struct usb_device *dev, int interface, int alternate) { struct usb_interface_descriptor *if_face = NULL; int ret, i; for (i = 0; i < dev->config.bNumInterfaces; i++) { if (dev->config.if_desc[i].bInterfaceNumber == interface) { if_face = &dev->config.if_desc[i]; break; } } if (!if_face) { printf("selecting invalid interface %d", interface); return -1; } /* * We should return now for devices with only one alternate setting. * According to 9.4.10 of the Universal Serial Bus Specification * Revision 2.0 such devices can return with a STALL. This results in * some USB sticks timeouting during initialization and then being * unusable in U-Boot. */ if (if_face->num_altsetting == 1) return 0; ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate, interface, NULL, 0, USB_CNTL_TIMEOUT * 5); if (ret < 0) return ret; return 0; } /******************************************************************** * set configuration number to configuration */ int usb_set_configuration(struct usb_device *dev, int configuration) { int res; USB_PRINTF("set configuration %d\n", configuration); /* set setup command */ res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION, 0, configuration, 0, NULL, 0, USB_CNTL_TIMEOUT); if (res == 0) { dev->toggle[0] = 0; dev->toggle[1] = 0; return 0; } else return -1; } /******************************************************************** * set protocol to protocol */ int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol) { return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE, protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT); } /******************************************************************** * set idle */ int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id) { return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT); } /******************************************************************** * get report */ int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size) { return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); } /******************************************************************** * get class descriptor */ int usb_get_class_descriptor(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size) { return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); } /******************************************************************** * get string index in buffer */ int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size) { int i; int result; for (i = 0; i < 3; ++i) { /* some devices are flaky */ result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, (USB_DT_STRING << 8) + index, langid, buf, size, USB_CNTL_TIMEOUT); if (result > 0) break; } return result; } static void usb_try_string_workarounds(unsigned char *buf, int *length) { int newlength, oldlength = *length; for (newlength = 2; newlength + 1 < oldlength; newlength += 2) if (!isprint(buf[newlength]) || buf[newlength + 1]) break; if (newlength > 2) { buf[0] = newlength; *length = newlength; } } static int usb_string_sub(struct usb_device *dev, unsigned int langid, unsigned int index, unsigned char *buf) { int rc; /* Try to read the string descriptor by asking for the maximum * possible number of bytes */ rc = usb_get_string(dev, langid, index, buf, 255); /* If that failed try to read the descriptor length, then * ask for just that many bytes */ if (rc < 2) { rc = usb_get_string(dev, langid, index, buf, 2); if (rc == 2) rc = usb_get_string(dev, langid, index, buf, buf[0]); } if (rc >= 2) { if (!buf[0] && !buf[1]) usb_try_string_workarounds(buf, &rc); /* There might be extra junk at the end of the descriptor */ if (buf[0] < rc) rc = buf[0]; rc = rc - (rc & 1); /* force a multiple of two */ } if (rc < 2) rc = -1; return rc; } /******************************************************************** * usb_string: * Get string index and translate it to ascii. * returns string length (> 0) or error (< 0) */ int usb_string(struct usb_device *dev, int index, char *buf, size_t size) { unsigned char mybuf[USB_BUFSIZ]; unsigned char *tbuf; int err; unsigned int u, idx; if (size <= 0 || !buf || !index) return -1; buf[0] = 0; tbuf = &mybuf[0]; /* get langid for strings if it's not yet known */ if (!dev->have_langid) { err = usb_string_sub(dev, 0, 0, tbuf); if (err < 0) { USB_PRINTF("error getting string descriptor 0 " \ "(error=%lx)\n", dev->status); return -1; } else if (tbuf[0] < 4) { USB_PRINTF("string descriptor 0 too short\n"); return -1; } else { dev->have_langid = -1; dev->string_langid = tbuf[2] | (tbuf[3] << 8); /* always use the first langid listed */ USB_PRINTF("USB device number %d default " \ "language ID 0x%x\n", dev->devnum, dev->string_langid); } } err = usb_string_sub(dev, dev->string_langid, index, tbuf); if (err < 0) return err; size--; /* leave room for trailing NULL char in output buffer */ for (idx = 0, u = 2; u < err; u += 2) { if (idx >= size) break; if (tbuf[u+1]) /* high byte */ buf[idx++] = '?'; /* non-ASCII character */ else buf[idx++] = tbuf[u]; } buf[idx] = 0; err = idx; return err; } /******************************************************************** * USB device handling: * the USB device are static allocated [USB_MAX_DEVICE]. */ /* returns a pointer to the device with the index [index]. * if the device is not assigned (dev->devnum==-1) returns NULL */ struct usb_device *usb_get_dev_index(int index) { if (usb_dev[index].devnum == -1) return NULL; else return &usb_dev[index]; } /* returns a pointer of a new device structure or NULL, if * no device struct is available */ struct usb_device *usb_alloc_new_device(void) { int i; USB_PRINTF("New Device %d\n", dev_index); if (dev_index == USB_MAX_DEVICE) { printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE); return NULL; } /* default Address is 0, real addresses start with 1 */ usb_dev[dev_index].devnum = dev_index + 1; usb_dev[dev_index].maxchild = 0; for (i = 0; i < USB_MAXCHILDREN; i++) usb_dev[dev_index].children[i] = NULL; usb_dev[dev_index].parent = NULL; dev_index++; return &usb_dev[dev_index - 1]; } /* * By the time we get here, the device has gotten a new device ID * and is in the default state. We need to identify the thing and * get the ball rolling.. * * Returns 0 for success, != 0 for error. */ int usb_new_device(struct usb_device *dev) { int addr, err; int tmp; unsigned char tmpbuf[USB_BUFSIZ]; /* We still haven't set the Address yet */ addr = dev->devnum; dev->devnum = 0; #ifdef CONFIG_LEGACY_USB_INIT_SEQ /* this is the old and known way of initializing devices, it is * different than what Windows and Linux are doing. Windows and Linux * both retrieve 64 bytes while reading the device descriptor * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an * invalid header while reading 8 bytes as device descriptor. */ dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */ dev->maxpacketsize = PACKET_SIZE_8; dev->epmaxpacketin[0] = 8; dev->epmaxpacketout[0] = 8; err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8); if (err < 8) { printf("\n USB device not responding, " \ "giving up (status=%lX)\n", dev->status); return 1; } #else /* This is a Windows scheme of initialization sequence, with double * reset of the device (Linux uses the same sequence) * Some equipment is said to work only with such init sequence; this * patch is based on the work by Alan Stern: * http://sourceforge.net/mailarchive/forum.php? * thread_id=5729457&forum_id=5398 */ struct usb_device_descriptor *desc; int port = -1; struct usb_device *parent = dev->parent; unsigned short portstatus; /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is * only 18 bytes long, this will terminate with a short packet. But if * the maxpacket size is 8 or 16 the device may be waiting to transmit * some more, or keeps on retransmitting the 8 byte header. */ desc = (struct usb_device_descriptor *)tmpbuf; dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */ /* Default to 64 byte max packet size */ dev->maxpacketsize = PACKET_SIZE_64; dev->epmaxpacketin[0] = 64; dev->epmaxpacketout[0] = 64; err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64); if (err < 0) { USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n"); return 1; } dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0; /* find the port number we're at */ if (parent) { int j; for (j = 0; j < parent->maxchild; j++) { if (parent->children[j] == dev) { port = j; break; } } if (port < 0) { printf("usb_new_device:cannot locate device's port.\n"); return 1; } /* reset the port for the second time */ err = hub_port_reset(dev->parent, port, &portstatus); if (err < 0) { printf("\n Couldn't reset port %i\n", port); return 1; } } #endif dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0; dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0; switch (dev->descriptor.bMaxPacketSize0) { case 8: dev->maxpacketsize = PACKET_SIZE_8; break; case 16: dev->maxpacketsize = PACKET_SIZE_16; break; case 32: dev->maxpacketsize = PACKET_SIZE_32; break; case 64: dev->maxpacketsize = PACKET_SIZE_64; break; } dev->devnum = addr; err = usb_set_address(dev); /* set address */ if (err < 0) { printf("\n USB device not accepting new address " \ "(error=%lX)\n", dev->status); return 1; } wait_ms(10); /* Let the SET_ADDRESS settle */ tmp = sizeof(dev->descriptor); err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, sizeof(dev->descriptor)); if (err < tmp) { if (err < 0) printf("unable to get device descriptor (error=%d)\n", err); else printf("USB device descriptor short read " \ "(expected %i, got %i)\n", tmp, err); return 1; } /* correct le values */ le16_to_cpus(&dev->descriptor.bcdUSB); le16_to_cpus(&dev->descriptor.idVendor); le16_to_cpus(&dev->descriptor.idProduct); le16_to_cpus(&dev->descriptor.bcdDevice); /* only support for one config for now */ usb_get_configuration_no(dev, &tmpbuf[0], 0); usb_parse_config(dev, &tmpbuf[0], 0); usb_set_maxpacket(dev); /* we set the default configuration here */ if (usb_set_configuration(dev, dev->config.bConfigurationValue)) { printf("failed to set default configuration " \ "len %d, status %lX\n", dev->act_len, dev->status); return -1; } USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n", dev->descriptor.iManufacturer, dev->descriptor.iProduct, dev->descriptor.iSerialNumber); memset(dev->mf, 0, sizeof(dev->mf)); memset(dev->prod, 0, sizeof(dev->prod)); memset(dev->serial, 0, sizeof(dev->serial)); if (dev->descriptor.iManufacturer) usb_string(dev, dev->descriptor.iManufacturer, dev->mf, sizeof(dev->mf)); if (dev->descriptor.iProduct) usb_string(dev, dev->descriptor.iProduct, dev->prod, sizeof(dev->prod)); if (dev->descriptor.iSerialNumber) usb_string(dev, dev->descriptor.iSerialNumber, dev->serial, sizeof(dev->serial)); USB_PRINTF("Manufacturer %s\n", dev->mf); USB_PRINTF("Product %s\n", dev->prod); USB_PRINTF("SerialNumber %s\n", dev->serial); /* now prode if the device is a hub */ usb_hub_probe(dev, 0); return 0; } /* build device Tree */ void usb_scan_devices(void) { int i; struct usb_device *dev; /* first make all devices unknown */ for (i = 0; i < USB_MAX_DEVICE; i++) { memset(&usb_dev[i], 0, sizeof(struct usb_device)); usb_dev[i].devnum = -1; } dev_index = 0; /* device 0 is always present (root hub, so let it analyze) */ dev = usb_alloc_new_device(); if (usb_new_device(dev)) printf("No USB Device found\n"); else printf("%d USB Device(s) found\n", dev_index); /* insert "driver" if possible */ #ifdef CONFIG_USB_KEYBOARD drv_usb_kbd_init(); USB_PRINTF("scan end\n"); #endif } /**************************************************************************** * HUB "Driver" * Probes device for being a hub and configurate it */ #undef USB_HUB_DEBUG #ifdef USB_HUB_DEBUG #define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args) #else #define USB_HUB_PRINTF(fmt, args...) #endif static struct usb_hub_device hub_dev[USB_MAX_HUB]; static int usb_hub_index; int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size) { return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT); } int usb_clear_hub_feature(struct usb_device *dev, int feature) { return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT); } int usb_clear_port_feature(struct usb_device *dev, int port, int feature) { return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT); } int usb_set_port_feature(struct usb_device *dev, int port, int feature) { return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT); } int usb_get_hub_status(struct usb_device *dev, void *data) { return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); } int usb_get_port_status(struct usb_device *dev, int port, void *data) { return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port, data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); } static void usb_hub_power_on(struct usb_hub_device *hub) { int i; struct usb_device *dev; dev = hub->pusb_dev; /* Enable power to the ports */ USB_HUB_PRINTF("enabling power on all ports\n"); for (i = 0; i < dev->maxchild; i++) { usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status); wait_ms(hub->desc.bPwrOn2PwrGood * 2); } } void usb_hub_reset(void) { usb_hub_index = 0; } struct usb_hub_device *usb_hub_allocate(void) { if (usb_hub_index < USB_MAX_HUB) return &hub_dev[usb_hub_index++]; printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB); return NULL; } #define MAX_TRIES 5 static inline char *portspeed(int portstatus) { if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED)) return "480 Mb/s"; else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED)) return "1.5 Mb/s"; else return "12 Mb/s"; } static int hub_port_reset(struct usb_device *dev, int port, unsigned short *portstat) { int tries; struct usb_port_status portsts; unsigned short portstatus, portchange; USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port); for (tries = 0; tries < MAX_TRIES; tries++) { usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET); wait_ms(200); if (usb_get_port_status(dev, port + 1, &portsts) < 0) { USB_HUB_PRINTF("get_port_status failed status %lX\n", dev->status); return -1; } portstatus = le16_to_cpu(portsts.wPortStatus); portchange = le16_to_cpu(portsts.wPortChange); USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange, portspeed(portstatus)); USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \ " USB_PORT_STAT_ENABLE %d\n", (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0, (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); if ((portchange & USB_PORT_STAT_C_CONNECTION) || !(portstatus & USB_PORT_STAT_CONNECTION)) return -1; if (portstatus & USB_PORT_STAT_ENABLE) break; wait_ms(200); } if (tries == MAX_TRIES) { USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \ "disabling port.\n", port + 1, MAX_TRIES); USB_HUB_PRINTF("Maybe the USB cable is bad?\n"); return -1; } usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); *portstat = portstatus; return 0; } void usb_hub_port_connect_change(struct usb_device *dev, int port) { struct usb_device *usb; struct usb_port_status portsts; unsigned short portstatus, portchange; /* Check status */ if (usb_get_port_status(dev, port + 1, &portsts) < 0) { USB_HUB_PRINTF("get_port_status failed\n"); return; } portstatus = le16_to_cpu(portsts.wPortStatus); portchange = le16_to_cpu(portsts.wPortChange); USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange, portspeed(portstatus)); /* Clear the connection change status */ usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION); /* Disconnect any existing devices under this port */ if (((!(portstatus & USB_PORT_STAT_CONNECTION)) && (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) { USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n"); /* Return now if nothing is connected */ if (!(portstatus & USB_PORT_STAT_CONNECTION)) return; } wait_ms(200); /* Reset the port */ if (hub_port_reset(dev, port, &portstatus) < 0) { printf("cannot reset port %i!?\n", port + 1); return; } wait_ms(200); /* Allocate a new device struct for it */ usb = usb_alloc_new_device(); if (portstatus & USB_PORT_STAT_HIGH_SPEED) usb->speed = USB_SPEED_HIGH; else if (portstatus & USB_PORT_STAT_LOW_SPEED) usb->speed = USB_SPEED_LOW; else usb->speed = USB_SPEED_FULL; dev->children[port] = usb; usb->parent = dev; /* Run it through the hoops (find a driver, etc) */ if (usb_new_device(usb)) { /* Woops, disable the port */ USB_HUB_PRINTF("hub: disabling port %d\n", port + 1); usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE); } } int usb_hub_configure(struct usb_device *dev) { unsigned char buffer[USB_BUFSIZ], *bitmap; struct usb_hub_descriptor *descriptor; struct usb_hub_status *hubsts; int i; struct usb_hub_device *hub; /* "allocate" Hub device */ hub = usb_hub_allocate(); if (hub == NULL) return -1; hub->pusb_dev = dev; /* Get the the hub descriptor */ if (usb_get_hub_descriptor(dev, buffer, 4) < 0) { USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \ "descriptor, giving up %lX\n", dev->status); return -1; } descriptor = (struct usb_hub_descriptor *)buffer; /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */ i = descriptor->bLength; if (i > USB_BUFSIZ) { USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \ "descriptor - too long: %d\n", descriptor->bLength); return -1; } if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) { USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \ "descriptor 2nd giving up %lX\n", dev->status); return -1; } memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength); /* adjust 16bit values */ hub->desc.wHubCharacteristics = le16_to_cpu(descriptor->wHubCharacteristics); /* set the bitmap */ bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0]; /* devices not removable by default */ memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0]; memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */ for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i]; for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i]; dev->maxchild = descriptor->bNbrPorts; USB_HUB_PRINTF("%d ports detected\n", dev->maxchild); switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) { case 0x00: USB_HUB_PRINTF("ganged power switching\n"); break; case 0x01: USB_HUB_PRINTF("individual port power switching\n"); break; case 0x02: case 0x03: USB_HUB_PRINTF("unknown reserved power switching mode\n"); break; } if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND) USB_HUB_PRINTF("part of a compound device\n"); else USB_HUB_PRINTF("standalone hub\n"); switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) { case 0x00: USB_HUB_PRINTF("global over-current protection\n"); break; case 0x08: USB_HUB_PRINTF("individual port over-current protection\n"); break; case 0x10: case 0x18: USB_HUB_PRINTF("no over-current protection\n"); break; } USB_HUB_PRINTF("power on to power good time: %dms\n", descriptor->bPwrOn2PwrGood * 2); USB_HUB_PRINTF("hub controller current requirement: %dmA\n", descriptor->bHubContrCurrent); for (i = 0; i < dev->maxchild; i++) USB_HUB_PRINTF("port %d is%s removable\n", i + 1, hub->desc.DeviceRemovable[(i + 1) / 8] & \ (1 << ((i + 1) % 8)) ? " not" : ""); if (sizeof(struct usb_hub_status) > USB_BUFSIZ) { USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \ "too long: %d\n", descriptor->bLength); return -1; } if (usb_get_hub_status(dev, buffer) < 0) { USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n", dev->status); return -1; } hubsts = (struct usb_hub_status *)buffer; USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n", le16_to_cpu(hubsts->wHubStatus), le16_to_cpu(hubsts->wHubChange)); USB_HUB_PRINTF("local power source is %s\n", (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \ "lost (inactive)" : "good"); USB_HUB_PRINTF("%sover-current condition exists\n", (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \ "" : "no "); usb_hub_power_on(hub); for (i = 0; i < dev->maxchild; i++) { struct usb_port_status portsts; unsigned short portstatus, portchange; if (usb_get_port_status(dev, i + 1, &portsts) < 0) { USB_HUB_PRINTF("get_port_status failed\n"); continue; } portstatus = le16_to_cpu(portsts.wPortStatus); portchange = le16_to_cpu(portsts.wPortChange); USB_HUB_PRINTF("Port %d Status %X Change %X\n", i + 1, portstatus, portchange); if (portchange & USB_PORT_STAT_C_CONNECTION) { USB_HUB_PRINTF("port %d connection change\n", i + 1); usb_hub_port_connect_change(dev, i); } if (portchange & USB_PORT_STAT_C_ENABLE) { USB_HUB_PRINTF("port %d enable change, status %x\n", i + 1, portstatus); usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE); /* EM interference sometimes causes bad shielded USB * devices to be shutdown by the hub, this hack enables * them again. Works at least with mouse driver */ if (!(portstatus & USB_PORT_STAT_ENABLE) && (portstatus & USB_PORT_STAT_CONNECTION) && ((dev->children[i]))) { USB_HUB_PRINTF("already running port %i " \ "disabled by hub (EMI?), " \ "re-enabling...\n", i + 1); usb_hub_port_connect_change(dev, i); } } if (portstatus & USB_PORT_STAT_SUSPEND) { USB_HUB_PRINTF("port %d suspend change\n", i + 1); usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND); } if (portchange & USB_PORT_STAT_C_OVERCURRENT) { USB_HUB_PRINTF("port %d over-current change\n", i + 1); usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT); usb_hub_power_on(hub); } if (portchange & USB_PORT_STAT_C_RESET) { USB_HUB_PRINTF("port %d reset change\n", i + 1); usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET); } } /* end for i all ports */ return 0; } int usb_hub_probe(struct usb_device *dev, int ifnum) { struct usb_interface_descriptor *iface; struct usb_endpoint_descriptor *ep; int ret; iface = &dev->config.if_desc[ifnum]; /* Is it a hub? */ if (iface->bInterfaceClass != USB_CLASS_HUB) return 0; /* Some hubs have a subclass of 1, which AFAICT according to the */ /* specs is not defined, but it works */ if ((iface->bInterfaceSubClass != 0) && (iface->bInterfaceSubClass != 1)) return 0; /* Multiple endpoints? What kind of mutant ninja-hub is this? */ if (iface->bNumEndpoints != 1) return 0; ep = &iface->ep_desc[0]; /* Output endpoint? Curiousier and curiousier.. */ if (!(ep->bEndpointAddress & USB_DIR_IN)) return 0; /* If it's not an interrupt endpoint, we'd better punt! */ if ((ep->bmAttributes & 3) != 3) return 0; /* We found a hub */ USB_HUB_PRINTF("USB hub found\n"); ret = usb_hub_configure(dev); return ret; } /* EOF */