diff options
Diffstat (limited to 'qemu/roms/u-boot/common/usb.c')
| -rw-r--r-- | qemu/roms/u-boot/common/usb.c | 1075 |
1 files changed, 1075 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/common/usb.c b/qemu/roms/u-boot/common/usb.c new file mode 100644 index 000000000..60daa1005 --- /dev/null +++ b/qemu/roms/u-boot/common/usb.c @@ -0,0 +1,1075 @@ +/* + * 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 + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * 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/compiler.h> +#include <linux/ctype.h> +#include <asm/byteorder.h> +#include <asm/unaligned.h> +#include <compiler.h> + +#include <usb.h> +#ifdef CONFIG_4xx +#include <asm/4xx_pci.h> +#endif + +#define USB_BUFSIZ 512 + +static struct usb_device usb_dev[USB_MAX_DEVICE]; +static int dev_index; +static int asynch_allowed; + +char usb_started; /* flag for the started/stopped USB status */ + +#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT +#define CONFIG_USB_MAX_CONTROLLER_COUNT 1 +#endif + +/*************************************************************************** + * Init USB Device + */ +int usb_init(void) +{ + void *ctrl; + struct usb_device *dev; + int i, start_index = 0; + + dev_index = 0; + asynch_allowed = 1; + usb_hub_reset(); + + /* 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; + } + + /* init low_level USB */ + for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { + /* init low_level USB */ + printf("USB%d: ", i); + if (usb_lowlevel_init(i, USB_INIT_HOST, &ctrl)) { + puts("lowlevel init failed\n"); + continue; + } + /* + * lowlevel init is OK, now scan the bus for devices + * i.e. search HUBs and configure them + */ + start_index = dev_index; + printf("scanning bus %d for devices... ", i); + dev = usb_alloc_new_device(ctrl); + /* + * device 0 is always present + * (root hub, so let it analyze) + */ + if (dev) + usb_new_device(dev); + + if (start_index == dev_index) + puts("No USB Device found\n"); + else + printf("%d USB Device(s) found\n", + dev_index - start_index); + + usb_started = 1; + } + + debug("scan end\n"); + /* if we were not able to find at least one working bus, bail out */ + if (!usb_started) { + puts("USB error: all controllers failed lowlevel init\n"); + return -1; + } + + return 0; +} + +/****************************************************************************** + * Stop USB this stops the LowLevel Part and deregisters USB devices. + */ +int usb_stop(void) +{ + int i; + + if (usb_started) { + asynch_allowed = 1; + usb_started = 0; + usb_hub_reset(); + + for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { + if (usb_lowlevel_stop(i)) + printf("failed to stop USB controller %d\n", i); + } + } + + return 0; +} + +/* + * 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. + * Returns the old value so it can be restored later. + */ +int usb_disable_asynch(int disable) +{ + int old_value = asynch_allowed; + + asynch_allowed = !disable; + return old_value; +} + + +/*------------------------------------------------------------------- + * 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) +{ + ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1); + + 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); + debug("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 */ + + if (submit_control_msg(dev, pipe, data, size, setup_packet) < 0) + return -1; + if (timeout == 0) + return (int)size; + + /* + * Wait for status to update until timeout expires, USB driver + * interrupt handler may set the status when the USB operation has + * been completed. + */ + while (timeout--) { + if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) + break; + mdelay(1); + } + if (dev->status) + 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 */ + if (submit_bulk_msg(dev, pipe, data, len) < 0) + return -1; + while (timeout--) { + if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) + break; + mdelay(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) + * + * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5. + */ +static void noinline +usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx) +{ + int b; + struct usb_endpoint_descriptor *ep; + u16 ep_wMaxPacketSize; + + ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx]; + + b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; + ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize); + + if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == + USB_ENDPOINT_XFER_CONTROL) { + /* Control => bidirectional */ + dev->epmaxpacketout[b] = ep_wMaxPacketSize; + dev->epmaxpacketin[b] = ep_wMaxPacketSize; + debug("##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; + debug("##EP epmaxpacketout[%d] = %d\n", + b, dev->epmaxpacketout[b]); + } + } else { + /* IN Endpoint */ + if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) { + dev->epmaxpacketin[b] = ep_wMaxPacketSize; + debug("##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 + */ +static int usb_set_maxpacket(struct usb_device *dev) +{ + int i, ii; + + for (i = 0; i < dev->config.desc.bNumInterfaces; i++) + for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++) + usb_set_maxpacket_ep(dev, i, 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. + * (wTotalLength has already been swapped and sanitized when it was read.) + */ +static 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; + u16 ep_wMaxPacketSize; + struct usb_interface *if_desc = NULL; + + 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; + } + if (head->bLength != USB_DT_CONFIG_SIZE) { + printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength); + return -1; + } + memcpy(&dev->config, head, USB_DT_CONFIG_SIZE); + dev->config.no_of_if = 0; + + index = dev->config.desc.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.desc.wTotalLength && head->bLength) { + switch (head->bDescriptorType) { + case USB_DT_INTERFACE: + if (head->bLength != USB_DT_INTERFACE_SIZE) { + printf("ERROR: Invalid USB IF length (%d)\n", + head->bLength); + break; + } + if (index + USB_DT_INTERFACE_SIZE > + dev->config.desc.wTotalLength) { + puts("USB IF descriptor overflowed buffer!\n"); + break; + } + if (((struct usb_interface_descriptor *) \ + head)->bInterfaceNumber != curr_if_num) { + /* this is a new interface, copy new desc */ + ifno = dev->config.no_of_if; + if (ifno >= USB_MAXINTERFACES) { + puts("Too many USB interfaces!\n"); + /* try to go on with what we have */ + return 1; + } + if_desc = &dev->config.if_desc[ifno]; + dev->config.no_of_if++; + memcpy(if_desc, head, + USB_DT_INTERFACE_SIZE); + if_desc->no_of_ep = 0; + if_desc->num_altsetting = 1; + curr_if_num = + if_desc->desc.bInterfaceNumber; + } else { + /* found alternate setting for the interface */ + if (ifno >= 0) { + if_desc = &dev->config.if_desc[ifno]; + if_desc->num_altsetting++; + } + } + break; + case USB_DT_ENDPOINT: + if (head->bLength != USB_DT_ENDPOINT_SIZE) { + printf("ERROR: Invalid USB EP length (%d)\n", + head->bLength); + break; + } + if (index + USB_DT_ENDPOINT_SIZE > + dev->config.desc.wTotalLength) { + puts("USB EP descriptor overflowed buffer!\n"); + break; + } + if (ifno < 0) { + puts("Endpoint descriptor out of order!\n"); + break; + } + epno = dev->config.if_desc[ifno].no_of_ep; + if_desc = &dev->config.if_desc[ifno]; + if (epno > USB_MAXENDPOINTS) { + printf("Interface %d has too many endpoints!\n", + if_desc->desc.bInterfaceNumber); + return 1; + } + /* found an endpoint */ + if_desc->no_of_ep++; + memcpy(&if_desc->ep_desc[epno], head, + USB_DT_ENDPOINT_SIZE); + ep_wMaxPacketSize = get_unaligned(&dev->config.\ + if_desc[ifno].\ + ep_desc[epno].\ + wMaxPacketSize); + put_unaligned(le16_to_cpu(ep_wMaxPacketSize), + &dev->config.\ + if_desc[ifno].\ + ep_desc[epno].\ + wMaxPacketSize); + debug("if %d, ep %d\n", ifno, epno); + break; + case USB_DT_SS_ENDPOINT_COMP: + if (head->bLength != USB_DT_SS_EP_COMP_SIZE) { + printf("ERROR: Invalid USB EPC length (%d)\n", + head->bLength); + break; + } + if (index + USB_DT_SS_EP_COMP_SIZE > + dev->config.desc.wTotalLength) { + puts("USB EPC descriptor overflowed buffer!\n"); + break; + } + if (ifno < 0 || epno < 0) { + puts("EPC descriptor out of order!\n"); + break; + } + if_desc = &dev->config.if_desc[ifno]; + memcpy(&if_desc->ss_ep_comp_desc[epno], head, + USB_DT_SS_EP_COMP_SIZE); + break; + default: + if (head->bLength == 0) + return 1; + + debug("unknown Description Type : %x\n", + head->bDescriptorType); + +#ifdef DEBUG + { + unsigned char *ch = (unsigned char *)head; + int i; + + for (i = 0; i < head->bLength; i++) + debug("%02X ", *ch++); + debug("\n\n\n"); + } +#endif + 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 + */ +static 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 length; + 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; + } + length = le16_to_cpu(config->wTotalLength); + + if (length > USB_BUFSIZ) { + printf("%s: failed to get descriptor - too long: %d\n", + __func__, length); + return -1; + } + + result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length); + debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result, length); + config->wTotalLength = length; /* validated, with CPU byte order */ + + 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) + */ +static int usb_set_address(struct usb_device *dev) +{ + int res; + + debug("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 *if_face = NULL; + int ret, i; + + for (i = 0; i < dev->config.desc.bNumInterfaces; i++) { + if (dev->config.if_desc[i].desc.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 + */ +static int usb_set_configuration(struct usb_device *dev, int configuration) +{ + int res; + debug("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 + */ +static 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) +{ + ALLOC_CACHE_ALIGN_BUFFER(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) { + debug("error getting string descriptor 0 " \ + "(error=%lx)\n", dev->status); + return -1; + } else if (tbuf[0] < 4) { + debug("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 */ + debug("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 *controller) +{ + int i; + debug("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; + usb_dev[dev_index].controller = controller; + dev_index++; + return &usb_dev[dev_index - 1]; +} + +/* + * Free the newly created device node. + * Called in error cases where configuring a newly attached + * device fails for some reason. + */ +void usb_free_device(void) +{ + dev_index--; + debug("Freeing device node: %d\n", dev_index); + memset(&usb_dev[dev_index], 0, sizeof(struct usb_device)); + usb_dev[dev_index].devnum = -1; +} + +/* + * XHCI issues Enable Slot command and thereafter + * allocates device contexts. Provide a weak alias + * function for the purpose, so that XHCI overrides it + * and EHCI/OHCI just work out of the box. + */ +__weak int usb_alloc_device(struct usb_device *udev) +{ + return 0; +} +/* + * 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; + ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ); + + /* + * Allocate usb 3.0 device context. + * USB 3.0 (xHCI) protocol tries to allocate device slot + * and related data structures first. This call does that. + * Refer to sec 4.3.2 in xHCI spec rev1.0 + */ + if (usb_alloc_device(dev)) { + printf("Cannot allocate device context to get SLOT_ID\n"); + return -1; + } + + /* 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, tmpbuf, 8); + if (err < 8) { + printf("\n USB device not responding, " \ + "giving up (status=%lX)\n", dev->status); + return 1; + } + memcpy(&dev->descriptor, tmpbuf, 8); +#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 + */ + __maybe_unused 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; + + /* + * XHCI needs to issue a Address device command to setup + * proper device context structures, before it can interact + * with the device. So a get_descriptor will fail before any + * of that is done for XHCI unlike EHCI. + */ +#ifndef CONFIG_USB_XHCI + err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64); + if (err < 0) { + debug("usb_new_device: usb_get_descriptor() failed\n"); + return 1; + } + + dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0; + /* + * Fetch the device class, driver can use this info + * to differentiate between HUB and DEVICE. + */ + dev->descriptor.bDeviceClass = desc->bDeviceClass; +#endif + + if (parent) { + int j; + + /* find the port number we're at */ + 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; + } + + mdelay(10); /* Let the SET_ADDRESS settle */ + + tmp = sizeof(dev->descriptor); + + err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, + tmpbuf, 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; + } + memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor)); + /* 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 */ + err = usb_get_configuration_no(dev, tmpbuf, 0); + if (err < 0) { + printf("usb_new_device: Cannot read configuration, " \ + "skipping device %04x:%04x\n", + dev->descriptor.idVendor, dev->descriptor.idProduct); + return -1; + } + usb_parse_config(dev, tmpbuf, 0); + usb_set_maxpacket(dev); + /* we set the default configuration here */ + if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) { + printf("failed to set default configuration " \ + "len %d, status %lX\n", dev->act_len, dev->status); + return -1; + } + debug("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)); + debug("Manufacturer %s\n", dev->mf); + debug("Product %s\n", dev->prod); + debug("SerialNumber %s\n", dev->serial); + /* now prode if the device is a hub */ + usb_hub_probe(dev, 0); + return 0; +} + +__weak +int board_usb_init(int index, enum usb_init_type init) +{ + return 0; +} +/* EOF */ |