| /* |
| * |
| * 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=%x)\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(); |
| usb_new_device(dev); |
| 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 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, |
| portstatus & (1 << USB_PORT_FEAT_LOWSPEED) ? \ |
| "Low Speed" : "High Speed"); |
| |
| 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, |
| portstatus&(1 << USB_PORT_FEAT_LOWSPEED) ? \ |
| "Low Speed" : "High Speed"); |
| |
| /* 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 */ |