[U-Boot] [PATCH 06/10] usb:g_dnl:f_thor: USB download function to support TIZEN's THOR protocol
Lukasz Majewski
l.majewski at samsung.com
Thu Oct 3 13:47:17 CEST 2013
Implementation of USB download function which supports THOR protocol.
Signed-off-by: Lukasz Majewski <l.majewski at samsung.com>
Cc: Marek Vasut <marex at denx.de>
---
drivers/usb/gadget/Makefile | 1 +
drivers/usb/gadget/f_thor.c | 1010 +++++++++++++++++++++++++++++++++++++++++++
drivers/usb/gadget/f_thor.h | 123 ++++++
include/thor.h | 27 ++
4 files changed, 1161 insertions(+)
create mode 100644 drivers/usb/gadget/f_thor.c
create mode 100644 drivers/usb/gadget/f_thor.h
create mode 100644 include/thor.h
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 1590c4a..afaf5ce 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -21,6 +21,7 @@ ifdef CONFIG_USB_GADGET
COBJS-$(CONFIG_USB_GADGET_ATMEL_USBA) += atmel_usba_udc.o
COBJS-$(CONFIG_USB_GADGET_S3C_UDC_OTG) += s3c_udc_otg.o
COBJS-$(CONFIG_USB_GADGET_FOTG210) += fotg210.o
+COBJS-$(CONFIG_THOR_FUNCTION) += f_thor.o
COBJS-$(CONFIG_USBDOWNLOAD_GADGET) += g_dnl.o
COBJS-$(CONFIG_DFU_FUNCTION) += f_dfu.o
COBJS-$(CONFIG_USB_GADGET_MASS_STORAGE) += f_mass_storage.o
diff --git a/drivers/usb/gadget/f_thor.c b/drivers/usb/gadget/f_thor.c
new file mode 100644
index 0000000..366194d
--- /dev/null
+++ b/drivers/usb/gadget/f_thor.c
@@ -0,0 +1,1010 @@
+/*
+ * f_thor.c -- USB TIZEN THOR Downloader gadget function
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Lukasz Majewski <l.majewski at samsung.com>
+ *
+ * Based on code from:
+ * git://review.tizen.org/kernel/u-boot
+ *
+ * Developed by:
+ * Copyright (C) 2009 Samsung Electronics
+ * Minkyu Kang <mk7.kang at samsung.com>
+ * Sanghee Kim <sh0130.kim at samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <errno.h>
+#include <common.h>
+#include <malloc.h>
+#include <version.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/cdc.h>
+#include <g_dnl.h>
+#include <dfu.h>
+
+#include "f_thor.h"
+
+static void thor_tx_data(char *data, int len);
+static void thor_set_dma(void *addr, int len);
+static int thor_rx_data(void);
+
+static struct f_thor *thor_func;
+static inline struct f_thor *func_to_thor(struct usb_function *f)
+{
+ return container_of(f, struct f_thor, usb_function);
+}
+
+DEFINE_CACHE_ALIGN_BUFFER(char, thor_tx_data_buf, sizeof(struct rsp_box));
+DEFINE_CACHE_ALIGN_BUFFER(char, thor_rx_data_buf, sizeof(struct rqt_box));
+
+/* ********************************************************** */
+/* THOR protocol - transmission handling */
+/* ********************************************************** */
+DEFINE_CACHE_ALIGN_BUFFER(char, f_name, F_NAME_BUF_SIZE);
+static unsigned long long int thor_file_size;
+static int alt_setting_num;
+
+static void send_rsp(const struct rsp_box *rsp)
+{
+ /* should be copy on dma duffer */
+ memcpy(thor_tx_data_buf, rsp, sizeof(struct rsp_box));
+ thor_tx_data(thor_tx_data_buf, sizeof(struct rsp_box));
+
+ debug("-RSP: %d, %d\n", rsp->rsp, rsp->rsp_data);
+}
+
+static void send_data_rsp(s32 ack, s32 count)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(struct data_rsp_box, rsp,
+ sizeof(struct data_rsp_box));
+
+ rsp->ack = ack;
+ rsp->count = count;
+
+ /* should be copy on dma duffer */
+ memcpy(thor_tx_data_buf, rsp, sizeof(struct data_rsp_box));
+ thor_tx_data(thor_tx_data_buf, sizeof(struct data_rsp_box));
+
+ debug("-DATA RSP: %d, %d\n", ack, count);
+}
+
+static int process_rqt_info(const struct rqt_box *rqt)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
+ memset(rsp, '\0', sizeof(struct rsp_box));
+
+ rsp->rsp = rqt->rqt;
+ rsp->rsp_data = rqt->rqt_data;
+
+ switch (rqt->rqt_data) {
+ case RQT_INFO_VER_PROTOCOL:
+ rsp->int_data[0] = VER_PROTOCOL_MAJOR;
+ rsp->int_data[1] = VER_PROTOCOL_MINOR;
+ break;
+ case RQT_INIT_VER_HW:
+ snprintf(rsp->str_data[0], sizeof(rsp->str_data[0]),
+ "%x", checkboard());
+ break;
+ case RQT_INIT_VER_BOOT:
+ sprintf(rsp->str_data[0], "%s", U_BOOT_VERSION);
+ break;
+ case RQT_INIT_VER_KERNEL:
+ sprintf(rsp->str_data[0], "%s", "k unknown");
+ break;
+ case RQT_INIT_VER_PLATFORM:
+ sprintf(rsp->str_data[0], "%s", "p unknown");
+ break;
+ case RQT_INIT_VER_CSC:
+ sprintf(rsp->str_data[0], "%s", "c unknown");
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ send_rsp(rsp);
+ return true;
+}
+
+static int process_rqt_cmd(const struct rqt_box *rqt)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
+ memset(rsp, '\0', sizeof(struct rsp_box));
+
+ rsp->rsp = rqt->rqt;
+ rsp->rsp_data = rqt->rqt_data;
+
+ switch (rqt->rqt_data) {
+ case RQT_CMD_REBOOT:
+ debug("TARGET RESET\n");
+ send_rsp(rsp);
+ g_dnl_unregister();
+ dfu_free_entities();
+ run_command("reset", 0);
+ break;
+ case RQT_CMD_POWEROFF:
+ case RQT_CMD_EFSCLEAR:
+ send_rsp(rsp);
+ default:
+ printf("Command not supported -> cmd: %d\n", rqt->rqt_data);
+ return -EINVAL;
+ }
+
+ return true;
+}
+
+static long long int download_head(unsigned long long total,
+ unsigned int packet_size,
+ long long int *left,
+ int *cnt)
+{
+ long long int rcv_cnt = 0, left_to_rcv, ret_rcv;
+ void *transfer_buffer = dfu_get_buf();
+ void *buf = transfer_buffer;
+ int usb_pkt_cnt = 0, ret;
+
+ /*
+ * Files smaller than THOR_STORE_UNIT_SIZE (now 32 MiB) are stored on
+ * the medium.
+ * The packet response is sent on the purpose after successful data
+ * chunk write. There is a room for improvement when asynchronous write
+ * is performed.
+ */
+ while (total - rcv_cnt >= packet_size) {
+ thor_set_dma(buf, packet_size);
+ buf += packet_size;
+ ret_rcv = thor_rx_data();
+ if (ret_rcv < 0)
+ return ret_rcv;
+ rcv_cnt += ret_rcv;
+ debug("%d: RCV data count: %llu cnt: %d\n", usb_pkt_cnt,
+ rcv_cnt, *cnt);
+
+ if ((rcv_cnt % THOR_STORE_UNIT_SIZE) == 0) {
+ ret = dfu_write(dfu_get_entity(alt_setting_num),
+ transfer_buffer, THOR_STORE_UNIT_SIZE,
+ (*cnt)++);
+ if (ret) {
+ error("DFU write failed [%d] cnt: %d",
+ ret, *cnt);
+ return ret;
+ }
+ buf = transfer_buffer;
+ }
+ send_data_rsp(0, ++usb_pkt_cnt);
+ }
+
+ /* Calculate the amount of data to arrive from PC (in bytes) */
+ left_to_rcv = total - rcv_cnt;
+
+ /*
+ * Calculate number of data already received. but not yet stored
+ * on the medium (they are smaller than THOR_STORE_UNIT_SIZE)
+ */
+ *left = left_to_rcv + buf - transfer_buffer;
+ debug("%s: left: %llu left_to_rcv: %llu buf: 0x%p\n", __func__,
+ *left, left_to_rcv, buf);
+
+ if (left_to_rcv) {
+ thor_set_dma(buf, packet_size);
+ ret_rcv = thor_rx_data();
+ if (ret_rcv < 0)
+ return ret_rcv;
+ rcv_cnt += ret_rcv;
+ send_data_rsp(0, ++usb_pkt_cnt);
+ }
+
+ debug("%s: %llu total: %llu cnt: %d\n", __func__, rcv_cnt, total, *cnt);
+
+ return rcv_cnt;
+}
+
+static int download_tail(long long int left, int cnt)
+{
+ void *transfer_buffer = dfu_get_buf();
+ int ret;
+
+ debug("%s: left: %llu cnt: %d\n", __func__, left, cnt);
+
+ if (left) {
+ ret = dfu_write(dfu_get_entity(alt_setting_num),
+ transfer_buffer, left, cnt++);
+ if (ret) {
+ error("DFU write failed [%d]: left: %llu", ret, left);
+ return ret;
+ }
+ }
+
+ /*
+ * To store last "packet" DFU storage backend requires dfu_write with
+ * size parameter equal to 0
+ *
+ * This also frees memory malloc'ed by dfu_get_buf(), so no explicit
+ * need fo call dfu_free_buf() is needed.
+ */
+ ret = dfu_write(dfu_get_entity(alt_setting_num),
+ transfer_buffer, 0, cnt);
+ if (ret)
+ error("DFU write failed [%d] cnt: %d", ret, cnt);
+
+ return ret;
+}
+
+static long long int process_rqt_download(const struct rqt_box *rqt)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
+ static long long int left, ret_head;
+ int file_type, ret = 0;
+ static int cnt;
+
+ memset(rsp, '\0', sizeof(struct rsp_box));
+ rsp->rsp = rqt->rqt;
+ rsp->rsp_data = rqt->rqt_data;
+
+ switch (rqt->rqt_data) {
+ case RQT_DL_INIT:
+ thor_file_size = rqt->int_data[0];
+ debug("INIT: total %d bytes\n", rqt->int_data[0]);
+ break;
+ case RQT_DL_FILE_INFO:
+ file_type = rqt->int_data[0];
+ if (file_type == FILE_TYPE_PIT) {
+ puts("PIT table file - not supported\n");
+ rsp->ack = -ENOTSUPP;
+ ret = rsp->ack;
+ break;
+ }
+
+ thor_file_size = rqt->int_data[1];
+ memcpy(f_name, rqt->str_data[0], F_NAME_BUF_SIZE);
+
+ debug("INFO: name(%s, %d), size(%llu), type(%d)\n",
+ f_name, 0, thor_file_size, file_type);
+
+ rsp->int_data[0] = THOR_PACKET_SIZE;
+
+ alt_setting_num = dfu_get_alt(f_name);
+ if (alt_setting_num < 0) {
+ error("Alt setting [%d] to write not found!",
+ alt_setting_num);
+ rsp->ack = -ENODEV;
+ ret = rsp->ack;
+ }
+ break;
+ case RQT_DL_FILE_START:
+ send_rsp(rsp);
+ ret_head = download_head(thor_file_size, THOR_PACKET_SIZE,
+ &left, &cnt);
+ if (ret_head < 0) {
+ left = 0;
+ cnt = 0;
+ }
+ return ret_head;
+ case RQT_DL_FILE_END:
+ debug("DL FILE_END\n");
+ rsp->ack = download_tail(left, cnt);
+ ret = rsp->ack;
+ left = 0;
+ cnt = 0;
+ break;
+ case RQT_DL_EXIT:
+ debug("DL EXIT\n");
+ break;
+ default:
+ error("Operation not supported: %d", rqt->rqt_data);
+ ret = -ENOTSUPP;
+ }
+
+ send_rsp(rsp);
+ return ret;
+}
+
+static int process_data(void)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(struct rqt_box, rqt, sizeof(struct rqt_box));
+ int ret = -EINVAL;
+
+ memset(rqt, 0, sizeof(rqt));
+ memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box));
+
+ debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data);
+
+ switch (rqt->rqt) {
+ case RQT_INFO:
+ ret = process_rqt_info(rqt);
+ break;
+ case RQT_CMD:
+ ret = process_rqt_cmd(rqt);
+ break;
+ case RQT_DL:
+ ret = (int) process_rqt_download(rqt);
+ break;
+ case RQT_UL:
+ puts("RQT: UPLOAD not supported!\n");
+ break;
+ default:
+ error("unknown request (%d)", rqt->rqt);
+ }
+
+ return ret;
+}
+
+/* ********************************************************** */
+/* THOR USB Function */
+/* ********************************************************** */
+
+static inline struct usb_endpoint_descriptor *
+ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
+ struct usb_endpoint_descriptor *fs)
+{
+ if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+ return hs;
+ return fs;
+}
+
+static struct usb_interface_descriptor thor_downloader_intf_data = {
+ .bLength = sizeof(thor_downloader_intf_data),
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_CDC_DATA,
+};
+
+
+static struct usb_endpoint_descriptor fs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+/* CDC configuration */
+static struct usb_interface_descriptor thor_downloader_intf_int = {
+ .bLength = sizeof(thor_downloader_intf_int),
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_COMM,
+ /* 0x02 Abstract Line Control Model */
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
+ /* 0x01 Common AT commands */
+ .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
+};
+
+static struct usb_cdc_header_desc thor_downloader_cdc_header = {
+ .bLength = sizeof(thor_downloader_cdc_header),
+ .bDescriptorType = 0x24, /* CS_INTERFACE */
+ .bDescriptorSubType = 0x00,
+ .bcdCDC = 0x0110,
+};
+
+
+static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = {
+ .bLength = sizeof(thor_downloader_cdc_call),
+ .bDescriptorType = 0x24, /* CS_INTERFACE */
+ .bDescriptorSubType = 0x01,
+ .bmCapabilities = 0x00,
+ .bDataInterface = 0x01,
+};
+
+struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = {
+ .bLength = sizeof(thor_downloader_cdc_abstract),
+ .bDescriptorType = 0x24, /* CS_INTERFACE */
+ .bDescriptorSubType = 0x02,
+ .bmCapabilities = 0x00,
+};
+
+struct usb_cdc_union_desc thor_downloader_cdc_union = {
+ .bLength = sizeof(thor_downloader_cdc_union),
+ .bDescriptorType = 0x24, /* CS_INTERFACE */
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,
+};
+
+static struct usb_endpoint_descriptor fs_int_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = 3 | USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = __constant_cpu_to_le16(16),
+
+ .bInterval = 0x9,
+};
+
+static struct usb_interface_assoc_descriptor
+thor_iad_descriptor = {
+ .bLength = sizeof(thor_iad_descriptor),
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ .bFirstInterface = 0,
+ .bInterfaceCount = 2, /* control + data */
+ .bFunctionClass = USB_CLASS_COMM,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
+ .bFunctionProtocol = USB_CDC_PROTO_NONE,
+};
+
+static struct usb_endpoint_descriptor hs_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = __constant_cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = __constant_cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_int_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = __constant_cpu_to_le16(16),
+
+ .bInterval = 0x9,
+};
+
+static struct usb_qualifier_descriptor dev_qualifier = {
+ .bLength = sizeof(dev_qualifier),
+ .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
+
+ .bcdUSB = __constant_cpu_to_le16(0x0200),
+ .bDeviceClass = USB_CLASS_VENDOR_SPEC,
+
+ .bNumConfigurations = 2,
+};
+
+/*
+ * This attribute vendor descriptor is necessary for correct operation with
+ * Windows version of THOR download program
+ *
+ * It prevents windows driver from sending zero lenght packet (ZLP) after
+ * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb
+ */
+static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = {
+ .bLength = sizeof(thor_downloader_cdc_av),
+ .bDescriptorType = 0x24,
+ .bDescriptorSubType = 0x80,
+ .DAUType = 0x0002,
+ .DAULength = 0x0001,
+ .DAUValue = 0x00,
+};
+
+static const struct usb_descriptor_header *hs_thor_downloader_function[] = {
+ (struct usb_descriptor_header *)&thor_iad_descriptor,
+
+ (struct usb_descriptor_header *)&thor_downloader_intf_int,
+ (struct usb_descriptor_header *)&thor_downloader_cdc_header,
+ (struct usb_descriptor_header *)&thor_downloader_cdc_call,
+ (struct usb_descriptor_header *)&thor_downloader_cdc_abstract,
+ (struct usb_descriptor_header *)&thor_downloader_cdc_union,
+ (struct usb_descriptor_header *)&hs_int_desc,
+
+ (struct usb_descriptor_header *)&thor_downloader_intf_data,
+ (struct usb_descriptor_header *)&thor_downloader_cdc_av,
+ (struct usb_descriptor_header *)&hs_in_desc,
+ (struct usb_descriptor_header *)&hs_out_desc,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length)
+{
+ struct usb_request *req;
+
+ req = usb_ep_alloc_request(ep, 0);
+ if (req) {
+ req->length = length;
+ req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length);
+ if (!req->buf) {
+ usb_ep_free_request(ep, req);
+ req = NULL;
+ }
+ }
+ return req;
+}
+
+static int thor_rx_data(void)
+{
+ struct thor_dev *dev = thor_func->dev;
+ int data_to_rx, tmp, status;
+
+ data_to_rx = dev->out_req->length;
+ tmp = data_to_rx;
+ do {
+ dev->out_req->length = data_to_rx;
+ debug("dev->out_req->length:%d dev->rxdata:%d\n",
+ dev->out_req->length, dev->rxdata);
+
+ status = usb_ep_queue(dev->out_ep, dev->out_req, 0);
+ if (status) {
+ error("kill %s: resubmit %d bytes --> %d",
+ dev->out_ep->name, dev->out_req->length, status);
+ usb_ep_set_halt(dev->out_ep);
+ return -EAGAIN;
+ }
+
+ while (!dev->rxdata) {
+ usb_gadget_handle_interrupts();
+ if (ctrlc())
+ return -1;
+ }
+ dev->rxdata = 0;
+ data_to_rx -= dev->out_req->actual;
+ } while (data_to_rx);
+
+ return tmp;
+}
+
+static void thor_tx_data(char *data, int len)
+{
+ struct thor_dev *dev = thor_func->dev;
+ unsigned char *ptr = dev->in_req->buf;
+ int status;
+
+ memset(ptr, '\0', len);
+ memcpy(ptr, data, len);
+
+ dev->in_req->length = len;
+
+ debug("%s: dev->in_req->length:%d to_cpy:%d\n", __func__,
+ dev->in_req->length, sizeof(data));
+
+ status = usb_ep_queue(dev->in_ep, dev->in_req, 0);
+ if (status) {
+ error("kill %s: resubmit %d bytes --> %d",
+ dev->in_ep->name, dev->in_req->length, status);
+ usb_ep_set_halt(dev->in_ep);
+ }
+
+ /* Wait until tx interrupt received */
+ while (!dev->txdata)
+ usb_gadget_handle_interrupts();
+
+ dev->txdata = 0;
+}
+
+static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct thor_dev *dev = thor_func->dev;
+ int status = req->status;
+
+ debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req);
+ switch (status) {
+ case 0: /* normal completion? */
+ if (ep == dev->out_ep)
+ dev->rxdata = 1;
+ else
+ dev->txdata = 1;
+
+ break;
+
+ /* this endpoint is normally active while we're configured */
+ case -ECONNABORTED: /* hardware forced ep reset */
+ case -ECONNRESET: /* request dequeued */
+ case -ESHUTDOWN: /* disconnect from host */
+ /* Exeptional situation - print error message */
+
+ case -EOVERFLOW:
+ error("ERROR:%d", status);
+ default:
+ debug("%s complete --> %d, %d/%d\n", ep->name,
+ status, req->actual, req->length);
+ case -EREMOTEIO: /* short read */
+ break;
+ }
+}
+
+static struct usb_request *thor_start_ep(struct usb_ep *ep)
+{
+ struct usb_request *req;
+
+ req = alloc_ep_req(ep, ep->maxpacket);
+ debug("%s: ep:%p req:%p\n", __func__, ep, req);
+
+ if (!req)
+ return NULL;
+
+ memset(req->buf, 0, req->length);
+ req->complete = thor_rx_tx_complete;
+
+ memset(req->buf, 0x55, req->length);
+
+ return req;
+}
+
+static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ if (req->status || req->actual != req->length)
+ debug("setup complete --> %d, %d/%d\n",
+ req->status, req->actual, req->length);
+}
+
+static int
+thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct thor_dev *dev = thor_func->dev;
+ struct usb_request *req = dev->req;
+ struct usb_gadget *gadget = dev->gadget;
+ int value = 0;
+
+ u16 len = le16_to_cpu(ctrl->wLength);
+
+ debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n",
+ ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex,
+ ctrl->wLength);
+
+ switch (ctrl->bRequest) {
+ case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
+ value = 0;
+ break;
+ case USB_CDC_REQ_SET_LINE_CODING:
+ value = len;
+ /* Line Coding set done = configuration done */
+ thor_func->dev->configuration_done = 1;
+ break;
+
+ default:
+ error("thor_setup: unknown request: %d", ctrl->bRequest);
+ }
+
+ if (value >= 0) {
+ req->length = value;
+ req->zero = value < len;
+ value = usb_ep_queue(gadget->ep0, req, 0);
+ if (value < 0) {
+ debug("%s: ep_queue: %d\n", __func__, value);
+ req->status = 0;
+ }
+ }
+
+ return value;
+}
+
+/* Specific to the THOR protocol */
+static void thor_set_dma(void *addr, int len)
+{
+ struct thor_dev *dev = thor_func->dev;
+
+ debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req);
+ debug("addr:%p, len:%d\n", addr, len);
+
+ dev->out_req->buf = addr;
+ dev->out_req->length = len;
+}
+
+const char *recv_key = "THOR";
+const char *tx_key = "ROHT";
+
+int thor_init(void)
+{
+ struct thor_dev *dev = thor_func->dev;
+
+ /* Wait for a device enumeration and configuration settings */
+ debug("THOR enumeration/configuration setting....\n");
+ while (!dev->configuration_done)
+ usb_gadget_handle_interrupts();
+
+ thor_set_dma(thor_rx_data_buf, strlen(recv_key));
+ /* detect the download request from Host PC */
+ if (thor_rx_data() < 0) {
+ printf("%s: Data not received!\n", __func__);
+ return -1;
+ }
+
+ if (strncmp(thor_rx_data_buf, recv_key, strlen(recv_key)) == 0) {
+ puts("Download request from the Host PC\n");
+ udelay(30 * 1000); /* 30 ms */
+
+ strncpy(thor_tx_data_buf, tx_key, strlen(tx_key));
+ thor_tx_data(thor_tx_data_buf, strlen(tx_key));
+ } else {
+ puts("Wrong reply information\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int thor_handle(void)
+{
+ int ret;
+
+ /* receive the data from Host PC */
+ while (1) {
+ thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box));
+ ret = thor_rx_data();
+
+ if (ret > 0) {
+ ret = process_data();
+ if (ret < 0)
+ return ret;
+ } else {
+ printf("%s: No data received!\n", __func__);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int thor_func_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_gadget *gadget = c->cdev->gadget;
+ struct f_thor *f_thor = func_to_thor(f);
+ struct thor_dev *dev;
+ struct usb_ep *ep;
+ int status;
+
+ thor_func = f_thor;
+ dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev));
+ if (!dev)
+ return -ENOMEM;
+
+ memset(dev, 0, sizeof(*dev));
+ dev->gadget = gadget;
+ f_thor->dev = dev;
+
+ debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n",
+ __func__, c, f);
+ debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev);
+
+ /* EP0 */
+ /* preallocate control response and buffer */
+ dev->req = usb_ep_alloc_request(gadget->ep0, 0);
+ if (!dev->req) {
+ status = -ENOMEM;
+ goto fail;
+ }
+ dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
+ gadget->ep0->maxpacket);
+ if (!dev->req->buf) {
+ status = -ENOMEM;
+ goto fail;
+ }
+
+ dev->req->complete = thor_setup_complete;
+
+ /* DYNAMIC interface numbers assignments */
+ status = usb_interface_id(c, f);
+
+ if (status < 0)
+ goto fail;
+
+ thor_downloader_intf_int.bInterfaceNumber = status;
+ thor_downloader_cdc_union.bMasterInterface0 = status;
+
+ status = usb_interface_id(c, f);
+
+ if (status < 0)
+ goto fail;
+
+ thor_downloader_intf_data.bInterfaceNumber = status;
+ thor_downloader_cdc_union.bSlaveInterface0 = status;
+
+ /* allocate instance-specific endpoints */
+ ep = usb_ep_autoconfig(gadget, &fs_in_desc);
+ if (!ep) {
+ status = -ENODEV;
+ goto fail;
+ }
+
+ if (gadget_is_dualspeed(gadget)) {
+ hs_in_desc.bEndpointAddress =
+ fs_in_desc.bEndpointAddress;
+ }
+
+ dev->in_ep = ep; /* Store IN EP for enabling @ setup */
+
+ ep = usb_ep_autoconfig(gadget, &fs_out_desc);
+ if (!ep) {
+ status = -ENODEV;
+ goto fail;
+ }
+
+ if (gadget_is_dualspeed(gadget))
+ hs_out_desc.bEndpointAddress =
+ fs_out_desc.bEndpointAddress;
+
+ dev->out_ep = ep; /* Store OUT EP for enabling @ setup */
+
+ ep = usb_ep_autoconfig(gadget, &fs_int_desc);
+ if (!ep) {
+ status = -ENODEV;
+ goto fail;
+ }
+
+ dev->int_ep = ep;
+
+ if (gadget_is_dualspeed(gadget)) {
+ hs_int_desc.bEndpointAddress =
+ fs_int_desc.bEndpointAddress;
+
+ f->hs_descriptors = (struct usb_descriptor_header **)
+ &hs_thor_downloader_function;
+
+ if (!f->hs_descriptors)
+ goto fail;
+ }
+
+ debug("%s: out_ep:%p out_req:%p\n", __func__,
+ dev->out_ep, dev->out_req);
+
+ return 0;
+
+ fail:
+ free(dev);
+ return status;
+}
+
+static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
+{
+ free(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+static void thor_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_thor *f_thor = func_to_thor(f);
+ struct thor_dev *dev = f_thor->dev;
+
+ free(dev);
+ memset(thor_func, 0, sizeof(*thor_func));
+ thor_func = NULL;
+}
+
+static void thor_func_disable(struct usb_function *f)
+{
+ struct f_thor *f_thor = func_to_thor(f);
+ struct thor_dev *dev = f_thor->dev;
+
+ debug("%s:\n", __func__);
+
+ /* Avoid freeing memory when ep is still claimed */
+ if (dev->in_ep->driver_data) {
+ free_ep_req(dev->in_ep, dev->in_req);
+ usb_ep_disable(dev->in_ep);
+ dev->in_ep->driver_data = NULL;
+ }
+
+ if (dev->out_ep->driver_data) {
+ dev->out_req->buf = NULL;
+ usb_ep_free_request(dev->out_ep, dev->out_req);
+ usb_ep_disable(dev->out_ep);
+ dev->out_ep->driver_data = NULL;
+ }
+
+ if (dev->int_ep->driver_data) {
+ usb_ep_disable(dev->int_ep);
+ dev->int_ep->driver_data = NULL;
+ }
+}
+
+static int thor_eps_setup(struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_gadget *gadget = cdev->gadget;
+ struct thor_dev *dev = thor_func->dev;
+ struct usb_endpoint_descriptor *d;
+ struct usb_request *req;
+ struct usb_ep *ep;
+ int result;
+
+ ep = dev->in_ep;
+ d = ep_desc(gadget, &hs_in_desc, &fs_in_desc);
+ debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
+
+ result = usb_ep_enable(ep, d);
+
+ if (result == 0) {
+ ep->driver_data = cdev; /* claim */
+ req = thor_start_ep(ep);
+ if (req != NULL) {
+ dev->in_req = req;
+ } else {
+ usb_ep_disable(ep);
+ result = -EIO;
+ }
+ } else {
+ goto exit;
+ }
+ ep = dev->out_ep;
+ d = ep_desc(gadget, &hs_out_desc, &fs_out_desc);
+ debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
+
+ result = usb_ep_enable(ep, d);
+
+ if (result == 0) {
+ ep->driver_data = cdev; /* claim */
+ req = thor_start_ep(ep);
+ if (req != NULL) {
+ dev->out_req = req;
+ } else {
+ usb_ep_disable(ep);
+ result = -EIO;
+ }
+ } else {
+ goto exit;
+ }
+ /* ACM control EP */
+ ep = dev->int_ep;
+ ep->driver_data = cdev; /* claim */
+
+ exit:
+ return result;
+}
+
+static int thor_func_set_alt(struct usb_function *f,
+ unsigned intf, unsigned alt)
+{
+ struct thor_dev *dev = thor_func->dev;
+ int result;
+
+ debug("%s: func: %s intf: %d alt: %d\n",
+ __func__, f->name, intf, alt);
+
+ switch (intf) {
+ case 0:
+ debug("ACM INTR interface\n");
+ break;
+ case 1:
+ debug("Communication Data interface\n");
+ result = thor_eps_setup(f);
+ if (result)
+ error("%s: EPs setup failed!", __func__);
+ dev->configuration_done = 1;
+ break;
+ }
+
+ return 0;
+}
+
+static int thor_func_init(struct usb_configuration *c)
+{
+ struct f_thor *f_thor;
+ int status;
+
+ debug("%s: cdev: 0x%p\n", __func__, c->cdev);
+
+ f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor));
+ if (!f_thor)
+ return -ENOMEM;
+
+ memset(f_thor, 0, sizeof(*f_thor));
+
+ f_thor->usb_function.name = "f_thor";
+ f_thor->usb_function.bind = thor_func_bind;
+ f_thor->usb_function.unbind = thor_unbind;
+ f_thor->usb_function.setup = thor_func_setup;
+ f_thor->usb_function.set_alt = thor_func_set_alt;
+ f_thor->usb_function.disable = thor_func_disable;
+
+ status = usb_add_function(c, &f_thor->usb_function);
+ if (status)
+ free(f_thor);
+
+ return status;
+}
+
+int thor_add(struct usb_configuration *c)
+{
+ debug("%s:\n", __func__);
+ return thor_func_init(c);
+}
diff --git a/drivers/usb/gadget/f_thor.h b/drivers/usb/gadget/f_thor.h
new file mode 100644
index 0000000..8a9e73c
--- /dev/null
+++ b/drivers/usb/gadget/f_thor.h
@@ -0,0 +1,123 @@
+/*
+ * f_thor.h - USB TIZEN THOR - internal gadget definitions
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Lukasz Majewski <l.majewski at samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _USB_THOR_H_
+#define _USB_THOR_H_
+
+#include <linux/compiler.h>
+
+/* THOR Composite Gadget */
+#define STRING_MANUFACTURER_IDX 0
+#define STRING_PRODUCT_IDX 1
+#define STRING_SERIAL_IDX 2
+
+/* ********************************************************** */
+/* THOR protocol definitions */
+/* ********************************************************** */
+
+/*
+ * Attribute Vendor descriptor - necessary to prevent ZLP transmission
+ * from Windows XP HOST PC
+ */
+struct usb_cdc_attribute_vendor_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubType;
+ __u16 DAUType;
+ __u16 DAULength;
+ __u8 DAUValue;
+} __packed;
+
+#define VER_PROTOCOL_MAJOR 4
+#define VER_PROTOCOL_MINOR 0
+
+enum rqt {
+ RQT_INFO = 200,
+ RQT_CMD,
+ RQT_DL,
+ RQT_UL,
+};
+
+enum rqt_data {
+ /* RQT_INFO */
+ RQT_INFO_VER_PROTOCOL = 1,
+ RQT_INIT_VER_HW,
+ RQT_INIT_VER_BOOT,
+ RQT_INIT_VER_KERNEL,
+ RQT_INIT_VER_PLATFORM,
+ RQT_INIT_VER_CSC,
+
+ /* RQT_CMD */
+ RQT_CMD_REBOOT = 1,
+ RQT_CMD_POWEROFF,
+ RQT_CMD_EFSCLEAR,
+
+ /* RQT_DL */
+ RQT_DL_INIT = 1,
+ RQT_DL_FILE_INFO,
+ RQT_DL_FILE_START,
+ RQT_DL_FILE_END,
+ RQT_DL_EXIT,
+
+ /* RQT_UL */
+ RQT_UL_INIT = 1,
+ RQT_UL_START,
+ RQT_UL_END,
+ RQT_UL_EXIT,
+};
+
+struct rqt_box { /* total: 256B */
+ s32 rqt; /* request id */
+ s32 rqt_data; /* request data id */
+ s32 int_data[14]; /* int data */
+ char str_data[5][32]; /* string data */
+ char md5[32]; /* md5 checksum */
+} __packed;
+
+struct rsp_box { /* total: 128B */
+ s32 rsp; /* response id (= request id) */
+ s32 rsp_data; /* response data id */
+ s32 ack; /* ack */
+ s32 int_data[5]; /* int data */
+ char str_data[3][32]; /* string data */
+} __packed;
+
+struct data_rsp_box { /* total: 8B */
+ s32 ack; /* response id (= request id) */
+ s32 count; /* response data id */
+} __packed;
+
+enum {
+ FILE_TYPE_NORMAL,
+ FILE_TYPE_PIT,
+};
+
+struct thor_dev {
+ struct usb_gadget *gadget;
+ struct usb_request *req; /* EP0 -> control responses */
+
+ /* IN/OUT EP's and correspoinding requests */
+ struct usb_ep *in_ep, *out_ep, *int_ep;
+ struct usb_request *in_req, *out_req;
+
+ /* Control flow variables */
+ unsigned char configuration_done;
+ unsigned char rxdata;
+ unsigned char txdata;
+};
+
+struct f_thor {
+ struct usb_function usb_function;
+ struct thor_dev *dev;
+};
+
+#define F_NAME_BUF_SIZE 32
+#define THOR_PACKET_SIZE (1 << 20) /* 1 MiB */
+#define THOR_STORE_UNIT_SIZE (32 << 20) /* 32 MiB */
+#endif /* _USB_THOR_H_ */
diff --git a/include/thor.h b/include/thor.h
new file mode 100644
index 0000000..afeade4
--- /dev/null
+++ b/include/thor.h
@@ -0,0 +1,27 @@
+/*
+ * thor.h -- USB THOR Downloader protocol
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Lukasz Majewski <l.majewski at samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ */
+
+#ifndef __THOR_H_
+#define __THOR_H_
+
+#include <linux/usb/composite.h>
+
+int thor_handle(void);
+int thor_init(void);
+
+#ifdef CONFIG_THOR_FUNCTION
+int thor_add(struct usb_configuration *c);
+#else
+int thor_add(struct usb_configuration *c)
+{
+ return 0;
+}
+#endif
+#endif /* __THOR_H_ */
--
1.7.10.4
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