[people/ms/u-boot.git] / drivers / usb / gadget / f_sdp.c

/*
 * f_sdp.c -- USB HID Serial Download Protocol
 *
 * Copyright (C) 2017 Toradex
 * Author: Stefan Agner <stefan.agner@toradex.com>
 *
 * This file implements the Serial Download Protocol (SDP) as specified in
 * the i.MX 6 Reference Manual. The SDP is a USB HID based protocol and
 * allows to download images directly to memory. The implementation
 * works with the imx_loader (imx_usb) USB client software on host side.
 *
 * Not all commands are implemented, e.g. WRITE_REGISTER, DCD_WRITE and
 * SKIP_DCD_HEADER are only stubs.
 *
 * Parts of the implementation are based on f_dfu and f_thor.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <errno.h>
#include <common.h>
#include <console.h>
#include <malloc.h>

#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/composite.h>

#include <asm/io.h>
#include <g_dnl.h>
#include <sdp.h>
#include <spl.h>
#include <image.h>
#include <imximage.h>
#include <watchdog.h>

#define HID_REPORT_ID_MASK	0x000000ff

/*
 * HID class requests
 */
#define HID_REQ_GET_REPORT		0x01
#define HID_REQ_GET_IDLE		0x02
#define HID_REQ_GET_PROTOCOL		0x03
#define HID_REQ_SET_REPORT		0x09
#define HID_REQ_SET_IDLE		0x0A
#define HID_REQ_SET_PROTOCOL		0x0B

#define HID_USAGE_PAGE_LEN		76

struct hid_report {
	u8 usage_page[HID_USAGE_PAGE_LEN];
} __packed;

#define SDP_READ_REGISTER	0x0101
#define SDP_WRITE_REGISTER	0x0202
#define SDP_WRITE_FILE		0x0404
#define SDP_ERROR_STATUS	0x0505
#define SDP_DCD_WRITE		0x0a0a
#define SDP_JUMP_ADDRESS	0x0b0b
#define SDP_SKIP_DCD_HEADER	0x0c0c

#define SDP_SECURITY_CLOSED		0x12343412
#define SDP_SECURITY_OPEN		0x56787856

#define SDP_WRITE_FILE_COMPLETE		0x88888888
#define SDP_WRITE_REGISTER_COMPLETE	0x128A8A12
#define SDP_SKIP_DCD_HEADER_COMPLETE	0x900DD009
#define SDP_ERROR_IMXHEADER		0x000a0533

#define SDP_COMMAND_LEN		16

struct sdp_command {
	u16 cmd;
	u32 addr;
	u8 format;
	u32 cnt;
	u32 data;
	u8 rsvd;
} __packed;

enum sdp_state {
	SDP_STATE_IDLE,
	SDP_STATE_RX_DCD_DATA,
	SDP_STATE_RX_FILE_DATA,
	SDP_STATE_TX_SEC_CONF,
	SDP_STATE_TX_SEC_CONF_BUSY,
	SDP_STATE_TX_REGISTER,
	SDP_STATE_TX_REGISTER_BUSY,
	SDP_STATE_TX_STATUS,
	SDP_STATE_TX_STATUS_BUSY,
	SDP_STATE_JUMP,
};

struct f_sdp {
	struct usb_function		usb_function;

	struct usb_descriptor_header	**function;

	u8				altsetting;
	enum sdp_state			state;
	enum sdp_state			next_state;
	u32				dnl_address;
	u32				dnl_bytes_remaining;
	u32				jmp_address;
	bool				always_send_status;
	u32				error_status;

	/* EP0 request */
	struct usb_request		*req;

	/* EP1 IN */
	struct usb_ep			*in_ep;
	struct usb_request		*in_req;

	bool				configuration_done;
};

static struct f_sdp *sdp_func;

static inline struct f_sdp *func_to_sdp(struct usb_function *f)
{
	return container_of(f, struct f_sdp, usb_function);
}

static struct usb_interface_descriptor sdp_intf_runtime = {
	.bLength =		sizeof(sdp_intf_runtime),
	.bDescriptorType =	USB_DT_INTERFACE,
	.bAlternateSetting =	0,
	.bNumEndpoints =	1,
	.bInterfaceClass =	USB_CLASS_HID,
	.bInterfaceSubClass =	0,
	.bInterfaceProtocol =	0,
	/* .iInterface = DYNAMIC */
};

/* HID configuration */
static struct usb_class_hid_descriptor sdp_hid_desc = {
	.bLength =		sizeof(sdp_hid_desc),
	.bDescriptorType =	USB_DT_CS_DEVICE,

	.bcdCDC =		__constant_cpu_to_le16(0x0110),
	.bCountryCode =		0,
	.bNumDescriptors =	1,

	.bDescriptorType0	= USB_DT_HID_REPORT,
	.wDescriptorLength0	= HID_USAGE_PAGE_LEN,
};

static struct usb_endpoint_descriptor in_desc = {
	.bLength =		USB_DT_ENDPOINT_SIZE,
	.bDescriptorType =	USB_DT_ENDPOINT, /*USB_DT_CS_ENDPOINT*/

	.bEndpointAddress =	1 | USB_DIR_IN,
	.bmAttributes =	USB_ENDPOINT_XFER_INT,
	.wMaxPacketSize =	64,
	.bInterval =		1,
};

static struct usb_descriptor_header *sdp_runtime_descs[] = {
	(struct usb_descriptor_header *)&sdp_intf_runtime,
	(struct usb_descriptor_header *)&sdp_hid_desc,
	(struct usb_descriptor_header *)&in_desc,
	NULL,
};

/* This is synchronized with what the SoC implementation reports */
static struct hid_report sdp_hid_report = {
	.usage_page = {
		0x06, 0x00, 0xff, /* Usage Page */
		0x09, 0x01, /* Usage (Pointer?) */
		0xa1, 0x01, /* Collection */

		0x85, 0x01, /* Report ID */
		0x19, 0x01, /* Usage Minimum */
		0x29, 0x01, /* Usage Maximum */
		0x15, 0x00, /* Local Minimum */
		0x26, 0xFF, 0x00, /* Local Maximum? */
		0x75, 0x08, /* Report Size */
		0x95, 0x10, /* Report Count */
		0x91, 0x02, /* Output Data */

		0x85, 0x02, /* Report ID */
		0x19, 0x01, /* Usage Minimum */
		0x29, 0x01, /* Usage Maximum */
		0x15, 0x00, /* Local Minimum */
		0x26, 0xFF, 0x00, /* Local Maximum? */
		0x75, 0x80, /* Report Size 128 */
		0x95, 0x40, /* Report Count */
		0x91, 0x02, /* Output Data */

		0x85, 0x03, /* Report ID */
		0x19, 0x01, /* Usage Minimum */
		0x29, 0x01, /* Usage Maximum */
		0x15, 0x00, /* Local Minimum */
		0x26, 0xFF, 0x00, /* Local Maximum? */
		0x75, 0x08, /* Report Size 8 */
		0x95, 0x04, /* Report Count */
		0x81, 0x02, /* Input Data */

		0x85, 0x04, /* Report ID */
		0x19, 0x01, /* Usage Minimum */
		0x29, 0x01, /* Usage Maximum */
		0x15, 0x00, /* Local Minimum */
		0x26, 0xFF, 0x00, /* Local Maximum? */
		0x75, 0x08, /* Report Size 8 */
		0x95, 0x40, /* Report Count */
		0x81, 0x02, /* Input Data */
		0xc0
	},
};

static const char sdp_name[] = "Serial Downloader Protocol";

/*
 * static strings, in UTF-8
 */
static struct usb_string strings_sdp_generic[] = {
	[0].s = sdp_name,
	{  }			/* end of list */
};

static struct usb_gadget_strings stringtab_sdp_generic = {
	.language	= 0x0409,	/* en-us */
	.strings	= strings_sdp_generic,
};

static struct usb_gadget_strings *sdp_generic_strings[] = {
	&stringtab_sdp_generic,
	NULL,
};

static inline void *sdp_ptr(u32 val)
{
	return (void *)(uintptr_t)val;
}

static void sdp_rx_command_complete(struct usb_ep *ep, struct usb_request *req)
{
	struct f_sdp *sdp = req->context;
	int status = req->status;
	u8 *data = req->buf;
	u8 report = data[0];

	if (status != 0) {
		pr_err("Status: %d\n", status);
		return;
	}

	if (report != 1) {
		pr_err("Unexpected report %d\n", report);
		return;
	}

	struct sdp_command *cmd = req->buf + 1;

	debug("%s: command: %04x, addr: %08x, cnt: %u\n",
	      __func__, be16_to_cpu(cmd->cmd),
	      be32_to_cpu(cmd->addr), be32_to_cpu(cmd->cnt));

	switch (be16_to_cpu(cmd->cmd)) {
	case SDP_READ_REGISTER:
		sdp->always_send_status = false;
		sdp->error_status = 0x0;

		sdp->state = SDP_STATE_TX_SEC_CONF;
		sdp->dnl_address = be32_to_cpu(cmd->addr);
		sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt);
		sdp->next_state = SDP_STATE_TX_REGISTER;
		printf("Reading %d registers at 0x%08x... ",
		       sdp->dnl_bytes_remaining, sdp->dnl_address);
		break;
	case SDP_WRITE_FILE:
		sdp->always_send_status = true;
		sdp->error_status = SDP_WRITE_FILE_COMPLETE;

		sdp->state = SDP_STATE_RX_FILE_DATA;
		sdp->dnl_address = be32_to_cpu(cmd->addr);
		sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt);
		sdp->next_state = SDP_STATE_IDLE;

		printf("Downloading file of size %d to 0x%08x... ",
		       sdp->dnl_bytes_remaining, sdp->dnl_address);

		break;
	case SDP_ERROR_STATUS:
		sdp->always_send_status = true;
		sdp->error_status = 0;

		sdp->state = SDP_STATE_TX_SEC_CONF;
		sdp->next_state = SDP_STATE_IDLE;
		break;
	case SDP_DCD_WRITE:
		sdp->always_send_status = true;
		sdp->error_status = SDP_WRITE_REGISTER_COMPLETE;

		sdp->state = SDP_STATE_RX_DCD_DATA;
		sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt);
		sdp->next_state = SDP_STATE_IDLE;
		break;
	case SDP_JUMP_ADDRESS:
		sdp->always_send_status = false;
		sdp->error_status = 0;

		sdp->jmp_address = be32_to_cpu(cmd->addr);
		sdp->state = SDP_STATE_TX_SEC_CONF;
		sdp->next_state = SDP_STATE_JUMP;
		break;
	case SDP_SKIP_DCD_HEADER:
		sdp->always_send_status = true;
		sdp->error_status = SDP_SKIP_DCD_HEADER_COMPLETE;

		/* Ignore command, DCD not supported anyway */
		sdp->state = SDP_STATE_TX_SEC_CONF;
		sdp->next_state = SDP_STATE_IDLE;
		break;
	default:
		pr_err("Unknown command: %04x\n", be16_to_cpu(cmd->cmd));
	}
}

static void sdp_rx_data_complete(struct usb_ep *ep, struct usb_request *req)
{
	struct f_sdp *sdp = req->context;
	int status = req->status;
	u8 *data = req->buf;
	u8 report = data[0];
	int datalen = req->length - 1;

	if (status != 0) {
		pr_err("Status: %d\n", status);
		return;
	}

	if (report != 2) {
		pr_err("Unexpected report %d\n", report);
		return;
	}

	if (sdp->dnl_bytes_remaining < datalen) {
		/*
		 * Some USB stacks require to send a complete buffer as
		 * specified in the HID descriptor. This leads to longer
		 * transfers than the file length, no problem for us.
		 */
		sdp->dnl_bytes_remaining = 0;
	} else {
		sdp->dnl_bytes_remaining -= datalen;
	}

	if (sdp->state == SDP_STATE_RX_FILE_DATA) {
		memcpy(sdp_ptr(sdp->dnl_address), req->buf + 1, datalen);
		sdp->dnl_address += datalen;
	}

	if (sdp->dnl_bytes_remaining)
		return;

	printf("done\n");

	switch (sdp->state) {
	case SDP_STATE_RX_FILE_DATA:
		sdp->state = SDP_STATE_TX_SEC_CONF;
		break;
	case SDP_STATE_RX_DCD_DATA:
		sdp->state = SDP_STATE_TX_SEC_CONF;
		break;
	default:
		pr_err("Invalid state: %d\n", sdp->state);
	}
}

static void sdp_tx_complete(struct usb_ep *ep, struct usb_request *req)
{
	struct f_sdp *sdp = req->context;
	int status = req->status;

	if (status != 0) {
		pr_err("Status: %d\n", status);
		return;
	}

	switch (sdp->state) {
	case SDP_STATE_TX_SEC_CONF_BUSY:
		/* Not all commands require status report */
		if (sdp->always_send_status || sdp->error_status)
			sdp->state = SDP_STATE_TX_STATUS;
		else
			sdp->state = sdp->next_state;

		break;
	case SDP_STATE_TX_STATUS_BUSY:
		sdp->state = sdp->next_state;
		break;
	case SDP_STATE_TX_REGISTER_BUSY:
		if (sdp->dnl_bytes_remaining)
			sdp->state = SDP_STATE_TX_REGISTER;
		else
			sdp->state = SDP_STATE_IDLE;
		break;
	default:
		pr_err("Wrong State: %d\n", sdp->state);
		sdp->state = SDP_STATE_IDLE;
		break;
	}
	debug("%s complete --> %d, %d/%d\n", ep->name,
	      status, req->actual, req->length);
}

static int sdp_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
{
	struct usb_gadget *gadget = f->config->cdev->gadget;
	struct usb_request *req = f->config->cdev->req;
	struct f_sdp *sdp = f->config->cdev->req->context;
	u16 len = le16_to_cpu(ctrl->wLength);
	u16 w_value = le16_to_cpu(ctrl->wValue);
	int value = 0;
	u8 req_type = ctrl->bRequestType & USB_TYPE_MASK;

	debug("w_value: 0x%04x len: 0x%04x\n", w_value, len);
	debug("req_type: 0x%02x ctrl->bRequest: 0x%02x sdp->state: %d\n",
	      req_type, ctrl->bRequest, sdp->state);

	if (req_type == USB_TYPE_STANDARD) {
		if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR) {
			/* Send HID report descriptor */
			value = min(len, (u16) sizeof(sdp_hid_report));
			memcpy(req->buf, &sdp_hid_report, value);
			sdp->configuration_done = true;
		}
	}

	if (req_type == USB_TYPE_CLASS) {
		int report = w_value & HID_REPORT_ID_MASK;

		/* HID (SDP) request */
		switch (ctrl->bRequest) {
		case HID_REQ_SET_REPORT:
			switch (report) {
			case 1:
				value = SDP_COMMAND_LEN + 1;
				req->complete = sdp_rx_command_complete;
				break;
			case 2:
				value = len;
				req->complete = sdp_rx_data_complete;
				break;
			}
		}
	}

	if (value >= 0) {
		req->length = value;
		req->zero = value < len;
		value = usb_ep_queue(gadget->ep0, req, 0);
		if (value < 0) {
			debug("ep_queue --> %d\n", value);
			req->status = 0;
		}
	}

	return value;
}

static int sdp_bind(struct usb_configuration *c, struct usb_function *f)
{
	struct usb_gadget *gadget = c->cdev->gadget;
	struct usb_composite_dev *cdev = c->cdev;
	struct f_sdp *sdp = func_to_sdp(f);
	int rv = 0, id;

	id = usb_interface_id(c, f);
	if (id < 0)
		return id;
	sdp_intf_runtime.bInterfaceNumber = id;

	struct usb_ep *ep;

	/* allocate instance-specific endpoints */
	ep = usb_ep_autoconfig(gadget, &in_desc);
	if (!ep) {
		rv = -ENODEV;
		goto error;
	}

	sdp->in_ep = ep; /* Store IN EP for enabling @ setup */

	cdev->req->context = sdp;

error:
	return rv;
}

static void sdp_unbind(struct usb_configuration *c, struct usb_function *f)
{
	free(sdp_func);
	sdp_func = 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)
		return 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 struct usb_request *sdp_start_ep(struct usb_ep *ep)
{
	struct usb_request *req;

	req = alloc_ep_req(ep, 64);
	debug("%s: ep:%p req:%p\n", __func__, ep, req);

	if (!req)
		return NULL;

	memset(req->buf, 0, req->length);
	req->complete = sdp_tx_complete;

	return req;
}
static int sdp_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
	struct f_sdp *sdp = func_to_sdp(f);
	struct usb_composite_dev *cdev = f->config->cdev;
	int result;

	debug("%s: intf: %d alt: %d\n", __func__, intf, alt);

	result = usb_ep_enable(sdp->in_ep, &in_desc);
	if (result)
		return result;
	sdp->in_req = sdp_start_ep(sdp->in_ep);
	sdp->in_req->context = sdp;

	sdp->in_ep->driver_data = cdev; /* claim */

	sdp->altsetting = alt;
	sdp->state = SDP_STATE_IDLE;

	return 0;
}

static int sdp_get_alt(struct usb_function *f, unsigned intf)
{
	struct f_sdp *sdp = func_to_sdp(f);

	return sdp->altsetting;
}

static void sdp_disable(struct usb_function *f)
{
	struct f_sdp *sdp = func_to_sdp(f);

	usb_ep_disable(sdp->in_ep);

	if (sdp->in_req) {
		free(sdp->in_req);
		sdp->in_req = NULL;
	}
}

static int sdp_bind_config(struct usb_configuration *c)
{
	int status;

	if (!sdp_func) {
		sdp_func = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*sdp_func));
		if (!sdp_func)
			return -ENOMEM;
	}

	memset(sdp_func, 0, sizeof(*sdp_func));

	sdp_func->usb_function.name = "sdp";
	sdp_func->usb_function.hs_descriptors = sdp_runtime_descs;
	sdp_func->usb_function.descriptors = sdp_runtime_descs;
	sdp_func->usb_function.bind = sdp_bind;
	sdp_func->usb_function.unbind = sdp_unbind;
	sdp_func->usb_function.set_alt = sdp_set_alt;
	sdp_func->usb_function.get_alt = sdp_get_alt;
	sdp_func->usb_function.disable = sdp_disable;
	sdp_func->usb_function.strings = sdp_generic_strings;
	sdp_func->usb_function.setup = sdp_setup;

	status = usb_add_function(c, &sdp_func->usb_function);

	return status;
}

int sdp_init(int controller_index)
{
	printf("SDP: initialize...\n");
	while (!sdp_func->configuration_done) {
		if (ctrlc()) {
			puts("\rCTRL+C - Operation aborted.\n");
			return 1;
		}

		WATCHDOG_RESET();
		usb_gadget_handle_interrupts(controller_index);
	}

	return 0;
}

static u32 sdp_jump_imxheader(void *address)
{
	flash_header_v2_t *headerv2 = address;
	ulong (*entry)(void);

	if (headerv2->header.tag != IVT_HEADER_TAG) {
		printf("Header Tag is not an IMX image\n");
		return SDP_ERROR_IMXHEADER;
	}

	printf("Jumping to 0x%08x\n", headerv2->entry);
	entry = sdp_ptr(headerv2->entry);
	entry();

	/* The image probably never returns hence we won't reach that point */
	return 0;
}

static void sdp_handle_in_ep(void)
{
	u8 *data = sdp_func->in_req->buf;
	u32 status;
	int datalen;

	switch (sdp_func->state) {
	case SDP_STATE_TX_SEC_CONF:
		debug("Report 3: HAB security\n");
		data[0] = 3;

		status = SDP_SECURITY_OPEN;
		memcpy(&data[1], &status, 4);
		sdp_func->in_req->length = 5;
		usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0);
		sdp_func->state = SDP_STATE_TX_SEC_CONF_BUSY;
		break;

	case SDP_STATE_TX_STATUS:
		debug("Report 4: Status\n");
		data[0] = 4;

		memcpy(&data[1], &sdp_func->error_status, 4);
		sdp_func->in_req->length = 65;
		usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0);
		sdp_func->state = SDP_STATE_TX_STATUS_BUSY;
		break;
	case SDP_STATE_TX_REGISTER:
		debug("Report 4: Register Values\n");
		data[0] = 4;

		datalen = sdp_func->dnl_bytes_remaining;

		if (datalen > 64)
			datalen = 64;

		memcpy(&data[1], sdp_ptr(sdp_func->dnl_address), datalen);
		sdp_func->in_req->length = 65;

		sdp_func->dnl_bytes_remaining -= datalen;
		sdp_func->dnl_address += datalen;

		usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0);
		sdp_func->state = SDP_STATE_TX_REGISTER_BUSY;
		break;
	case SDP_STATE_JUMP:
		printf("Jumping to header at 0x%08x\n", sdp_func->jmp_address);
		status = sdp_jump_imxheader(sdp_ptr(sdp_func->jmp_address));

		/* If imx header fails, try some U-Boot specific headers */
		if (status) {
#ifdef CONFIG_SPL_BUILD
			/* In SPL, allow jumps to U-Boot images */
			struct spl_image_info spl_image = {};
			spl_parse_image_header(&spl_image,
				(struct image_header *)sdp_func->jmp_address);
			jump_to_image_no_args(&spl_image);
#else
			/* In U-Boot, allow jumps to scripts */
			source(sdp_func->jmp_address, "script@1");
#endif
		}

		sdp_func->next_state = SDP_STATE_IDLE;
		sdp_func->error_status = status;

		/* Only send Report 4 if there was an error */
		if (status)
			sdp_func->state = SDP_STATE_TX_STATUS;
		else
			sdp_func->state = SDP_STATE_IDLE;
		break;
	default:
		break;
	};
}

void sdp_handle(int controller_index)
{
	printf("SDP: handle requests...\n");
	while (1) {
		if (ctrlc()) {
			puts("\rCTRL+C - Operation aborted.\n");
			return;
		}

		WATCHDOG_RESET();
		usb_gadget_handle_interrupts(controller_index);

		sdp_handle_in_ep();
	}
}

int sdp_add(struct usb_configuration *c)
{
	int id;

	id = usb_string_id(c->cdev);
	if (id < 0)
		return id;
	strings_sdp_generic[0].id = id;
	sdp_intf_runtime.iInterface = id;

	debug("%s: cdev: %p gadget: %p gadget->ep0: %p\n", __func__,
	      c->cdev, c->cdev->gadget, c->cdev->gadget->ep0);

	return sdp_bind_config(c);
}

DECLARE_GADGET_BIND_CALLBACK(usb_dnl_sdp, sdp_add);
Commit	Line	Data
5661f08a SA	1	/*
	2	* f_sdp.c -- USB HID Serial Download Protocol
	3	*
	4	* Copyright (C) 2017 Toradex
	5	* Author: Stefan Agner <stefan.agner@toradex.com>
	6	*
	7	* This file implements the Serial Download Protocol (SDP) as specified in
	8	* the i.MX 6 Reference Manual. The SDP is a USB HID based protocol and
	9	* allows to download images directly to memory. The implementation
	10	* works with the imx_loader (imx_usb) USB client software on host side.
	11	*
	12	* Not all commands are implemented, e.g. WRITE_REGISTER, DCD_WRITE and
	13	* SKIP_DCD_HEADER are only stubs.
	14	*
	15	* Parts of the implementation are based on f_dfu and f_thor.
	16	*
	17	* SPDX-License-Identifier: GPL-2.0+
	18	*/
	19
	20	#include <errno.h>
	21	#include <common.h>
	22	#include <console.h>
	23	#include <malloc.h>
	24
	25	#include <linux/usb/ch9.h>
	26	#include <linux/usb/gadget.h>
	27	#include <linux/usb/composite.h>
	28
	29	#include <asm/io.h>
	30	#include <g_dnl.h>
	31	#include <sdp.h>
ccd7a4d2 SA	32	#include <spl.h>
ccd7a4d2 SA	33	#include <image.h>
5661f08a	34	#include <imximage.h>
8171dac0	35	#include <watchdog.h>
5661f08a SA	36
	37	#define HID_REPORT_ID_MASK 0x000000ff
	38
	39	/*
	40	* HID class requests
	41	*/
	42	#define HID_REQ_GET_REPORT 0x01
	43	#define HID_REQ_GET_IDLE 0x02
	44	#define HID_REQ_GET_PROTOCOL 0x03
	45	#define HID_REQ_SET_REPORT 0x09
	46	#define HID_REQ_SET_IDLE 0x0A
	47	#define HID_REQ_SET_PROTOCOL 0x0B
	48
	49	#define HID_USAGE_PAGE_LEN 76
	50
	51	struct hid_report {
	52	u8 usage_page[HID_USAGE_PAGE_LEN];
	53	} __packed;
	54
	55	#define SDP_READ_REGISTER 0x0101
	56	#define SDP_WRITE_REGISTER 0x0202
	57	#define SDP_WRITE_FILE 0x0404
	58	#define SDP_ERROR_STATUS 0x0505
	59	#define SDP_DCD_WRITE 0x0a0a
	60	#define SDP_JUMP_ADDRESS 0x0b0b
	61	#define SDP_SKIP_DCD_HEADER 0x0c0c
	62
	63	#define SDP_SECURITY_CLOSED 0x12343412
	64	#define SDP_SECURITY_OPEN 0x56787856
	65
	66	#define SDP_WRITE_FILE_COMPLETE 0x88888888
	67	#define SDP_WRITE_REGISTER_COMPLETE 0x128A8A12
	68	#define SDP_SKIP_DCD_HEADER_COMPLETE 0x900DD009
	69	#define SDP_ERROR_IMXHEADER 0x000a0533
	70
	71	#define SDP_COMMAND_LEN 16
	72
	73	struct sdp_command {
	74	u16 cmd;
	75	u32 addr;
	76	u8 format;
	77	u32 cnt;
	78	u32 data;
	79	u8 rsvd;
	80	} __packed;
	81
	82	enum sdp_state {
	83	SDP_STATE_IDLE,
	84	SDP_STATE_RX_DCD_DATA,
	85	SDP_STATE_RX_FILE_DATA,
	86	SDP_STATE_TX_SEC_CONF,
	87	SDP_STATE_TX_SEC_CONF_BUSY,
	88	SDP_STATE_TX_REGISTER,
	89	SDP_STATE_TX_REGISTER_BUSY,
	90	SDP_STATE_TX_STATUS,
	91	SDP_STATE_TX_STATUS_BUSY,
	92	SDP_STATE_JUMP,
	93	};
	94
	95	struct f_sdp {
	96	struct usb_function usb_function;
	97
	98	struct usb_descriptor_header **function;
	99
100	u8 altsetting;
101	enum sdp_state state;
102	enum sdp_state next_state;
103	u32 dnl_address;
104	u32 dnl_bytes_remaining;
105	u32 jmp_address;
106	bool always_send_status;
107	u32 error_status;
108
109	/* EP0 request */
110	struct usb_request *req;
111
112	/* EP1 IN */
113	struct usb_ep *in_ep;
114	struct usb_request *in_req;
115
116	bool configuration_done;
117	};
118
119	static struct f_sdp *sdp_func;
120
121	static inline struct f_sdp func_to_sdp(struct usb_function f)
122	{
123	return container_of(f, struct f_sdp, usb_function);
124	}
125
126	static struct usb_interface_descriptor sdp_intf_runtime = {
127	.bLength = sizeof(sdp_intf_runtime),
128	.bDescriptorType = USB_DT_INTERFACE,
129	.bAlternateSetting = 0,
130	.bNumEndpoints = 1,
131	.bInterfaceClass = USB_CLASS_HID,
132	.bInterfaceSubClass = 0,
133	.bInterfaceProtocol = 0,
134	/* .iInterface = DYNAMIC */
135	};
136
137	/* HID configuration */
138	static struct usb_class_hid_descriptor sdp_hid_desc = {
139	.bLength = sizeof(sdp_hid_desc),
140	.bDescriptorType = USB_DT_CS_DEVICE,
141
142	.bcdCDC = __constant_cpu_to_le16(0x0110),
143	.bCountryCode = 0,
144	.bNumDescriptors = 1,
145
146	.bDescriptorType0 = USB_DT_HID_REPORT,
147	.wDescriptorLength0 = HID_USAGE_PAGE_LEN,
148	};
149
150	static struct usb_endpoint_descriptor in_desc = {
151	.bLength = USB_DT_ENDPOINT_SIZE,
152	.bDescriptorType = USB_DT_ENDPOINT, /USB_DT_CS_ENDPOINT/
153
154	.bEndpointAddress = 1 \| USB_DIR_IN,
155	.bmAttributes = USB_ENDPOINT_XFER_INT,
156	.wMaxPacketSize = 64,
157	.bInterval = 1,
158	};
159
160	static struct usb_descriptor_header *sdp_runtime_descs[] = {
161	(struct usb_descriptor_header *)&sdp_intf_runtime,
162	(struct usb_descriptor_header *)&sdp_hid_desc,
163	(struct usb_descriptor_header *)&in_desc,
164	NULL,
165	};
166
167	/* This is synchronized with what the SoC implementation reports */
168	static struct hid_report sdp_hid_report = {
169	.usage_page = {
170	0x06, 0x00, 0xff, /* Usage Page */
171	0x09, 0x01, /* Usage (Pointer?) */
172	0xa1, 0x01, /* Collection */
173
174	0x85, 0x01, /* Report ID */
175	0x19, 0x01, /* Usage Minimum */
176	0x29, 0x01, /* Usage Maximum */
177	0x15, 0x00, /* Local Minimum */
178	0x26, 0xFF, 0x00, /* Local Maximum? */
179	0x75, 0x08, /* Report Size */
180	0x95, 0x10, /* Report Count */
181	0x91, 0x02, /* Output Data */
182
183	0x85, 0x02, /* Report ID */
184	0x19, 0x01, /* Usage Minimum */
185	0x29, 0x01, /* Usage Maximum */
186	0x15, 0x00, /* Local Minimum */
187	0x26, 0xFF, 0x00, /* Local Maximum? */
188	0x75, 0x80, /* Report Size 128 */
189	0x95, 0x40, /* Report Count */
190	0x91, 0x02, /* Output Data */
191
192	0x85, 0x03, /* Report ID */
193	0x19, 0x01, /* Usage Minimum */
194	0x29, 0x01, /* Usage Maximum */
195	0x15, 0x00, /* Local Minimum */
196	0x26, 0xFF, 0x00, /* Local Maximum? */
197	0x75, 0x08, /* Report Size 8 */
198	0x95, 0x04, /* Report Count */
199	0x81, 0x02, /* Input Data */
200
201	0x85, 0x04, /* Report ID */
202	0x19, 0x01, /* Usage Minimum */
203	0x29, 0x01, /* Usage Maximum */
204	0x15, 0x00, /* Local Minimum */
205	0x26, 0xFF, 0x00, /* Local Maximum? */
206	0x75, 0x08, /* Report Size 8 */
207	0x95, 0x40, /* Report Count */
208	0x81, 0x02, /* Input Data */
209	0xc0
210	},
211	};
212
213	static const char sdp_name[] = "Serial Downloader Protocol";
214
215	/*
216	* static strings, in UTF-8
217	*/
218	static struct usb_string strings_sdp_generic[] = {
219	[0].s = sdp_name,
220	{ } /* end of list */
221	};
222
223	static struct usb_gadget_strings stringtab_sdp_generic = {
224	.language = 0x0409, /* en-us */
225	.strings = strings_sdp_generic,
226	};
227
228	static struct usb_gadget_strings *sdp_generic_strings[] = {
229	&stringtab_sdp_generic,
230	NULL,
231	};
232
a64a614d AH	233	static inline void *sdp_ptr(u32 val)
	234	{
	235	return (void *)(uintptr_t)val;
	236	}
	237
5661f08a SA	238	static void sdp_rx_command_complete(struct usb_ep ep, struct usb_request req)
	239	{
	240	struct f_sdp *sdp = req->context;
	241	int status = req->status;
	242	u8 *data = req->buf;
	243	u8 report = data[0];
	244
	245	if (status != 0) {
24ccd0c8	246	pr_err("Status: %d\n", status);
5661f08a SA	247	return;
	248	}
	249
	250	if (report != 1) {
24ccd0c8	251	pr_err("Unexpected report %d\n", report);
5661f08a SA	252	return;
	253	}
	254
	255	struct sdp_command *cmd = req->buf + 1;
	256
	257	debug("%s: command: %04x, addr: %08x, cnt: %u\n",
	258	__func__, be16_to_cpu(cmd->cmd),
	259	be32_to_cpu(cmd->addr), be32_to_cpu(cmd->cnt));
	260
	261	switch (be16_to_cpu(cmd->cmd)) {
	262	case SDP_READ_REGISTER:
	263	sdp->always_send_status = false;
	264	sdp->error_status = 0x0;
	265
	266	sdp->state = SDP_STATE_TX_SEC_CONF;
	267	sdp->dnl_address = be32_to_cpu(cmd->addr);
	268	sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt);
	269	sdp->next_state = SDP_STATE_TX_REGISTER;
	270	printf("Reading %d registers at 0x%08x... ",
	271	sdp->dnl_bytes_remaining, sdp->dnl_address);
	272	break;
	273	case SDP_WRITE_FILE:
	274	sdp->always_send_status = true;
	275	sdp->error_status = SDP_WRITE_FILE_COMPLETE;
	276
	277	sdp->state = SDP_STATE_RX_FILE_DATA;
	278	sdp->dnl_address = be32_to_cpu(cmd->addr);
	279	sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt);
	280	sdp->next_state = SDP_STATE_IDLE;
	281
	282	printf("Downloading file of size %d to 0x%08x... ",
	283	sdp->dnl_bytes_remaining, sdp->dnl_address);
	284
	285	break;
	286	case SDP_ERROR_STATUS:
	287	sdp->always_send_status = true;
	288	sdp->error_status = 0;
	289
	290	sdp->state = SDP_STATE_TX_SEC_CONF;
	291	sdp->next_state = SDP_STATE_IDLE;
	292	break;
	293	case SDP_DCD_WRITE:
	294	sdp->always_send_status = true;
	295	sdp->error_status = SDP_WRITE_REGISTER_COMPLETE;
	296
	297	sdp->state = SDP_STATE_RX_DCD_DATA;
	298	sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt);
	299	sdp->next_state = SDP_STATE_IDLE;
	300	break;
	301	case SDP_JUMP_ADDRESS:
	302	sdp->always_send_status = false;
	303	sdp->error_status = 0;
	304
	305	sdp->jmp_address = be32_to_cpu(cmd->addr);
	306	sdp->state = SDP_STATE_TX_SEC_CONF;
	307	sdp->next_state = SDP_STATE_JUMP;
	308	break;
	309	case SDP_SKIP_DCD_HEADER:
	310	sdp->always_send_status = true;
	311	sdp->error_status = SDP_SKIP_DCD_HEADER_COMPLETE;
	312
	313	/* Ignore command, DCD not supported anyway */
	314	sdp->state = SDP_STATE_TX_SEC_CONF;
	315	sdp->next_state = SDP_STATE_IDLE;
316	break;
317	default:
9b643e31	318	pr_err("Unknown command: %04x\n", be16_to_cpu(cmd->cmd));
5661f08a SA	319	}
	320	}
	321
	322	static void sdp_rx_data_complete(struct usb_ep ep, struct usb_request req)
	323	{
	324	struct f_sdp *sdp = req->context;
	325	int status = req->status;
	326	u8 *data = req->buf;
	327	u8 report = data[0];
	328	int datalen = req->length - 1;
	329
	330	if (status != 0) {
24ccd0c8	331	pr_err("Status: %d\n", status);
5661f08a SA	332	return;
	333	}
	334
	335	if (report != 2) {
24ccd0c8	336	pr_err("Unexpected report %d\n", report);
5661f08a SA	337	return;
	338	}
	339
	340	if (sdp->dnl_bytes_remaining < datalen) {
	341	/*
	342	* Some USB stacks require to send a complete buffer as
	343	* specified in the HID descriptor. This leads to longer
	344	* transfers than the file length, no problem for us.
	345	*/
	346	sdp->dnl_bytes_remaining = 0;
	347	} else {
	348	sdp->dnl_bytes_remaining -= datalen;
	349	}
	350
	351	if (sdp->state == SDP_STATE_RX_FILE_DATA) {
a64a614d	352	memcpy(sdp_ptr(sdp->dnl_address), req->buf + 1, datalen);
5661f08a SA	353	sdp->dnl_address += datalen;
	354	}
	355
	356	if (sdp->dnl_bytes_remaining)
	357	return;
	358
	359	printf("done\n");
	360
	361	switch (sdp->state) {
	362	case SDP_STATE_RX_FILE_DATA:
	363	sdp->state = SDP_STATE_TX_SEC_CONF;
	364	break;
	365	case SDP_STATE_RX_DCD_DATA:
	366	sdp->state = SDP_STATE_TX_SEC_CONF;
	367	break;
	368	default:
24ccd0c8	369	pr_err("Invalid state: %d\n", sdp->state);
5661f08a SA	370	}
	371	}
	372
	373	static void sdp_tx_complete(struct usb_ep ep, struct usb_request req)
	374	{
	375	struct f_sdp *sdp = req->context;
	376	int status = req->status;
	377
	378	if (status != 0) {
24ccd0c8	379	pr_err("Status: %d\n", status);
5661f08a SA	380	return;
	381	}
	382
	383	switch (sdp->state) {
	384	case SDP_STATE_TX_SEC_CONF_BUSY:
	385	/* Not all commands require status report */
	386	if (sdp->always_send_status \|\| sdp->error_status)
	387	sdp->state = SDP_STATE_TX_STATUS;
	388	else
	389	sdp->state = sdp->next_state;
	390
	391	break;
	392	case SDP_STATE_TX_STATUS_BUSY:
	393	sdp->state = sdp->next_state;
	394	break;
	395	case SDP_STATE_TX_REGISTER_BUSY:
	396	if (sdp->dnl_bytes_remaining)
	397	sdp->state = SDP_STATE_TX_REGISTER;
	398	else
	399	sdp->state = SDP_STATE_IDLE;
	400	break;
	401	default:
24ccd0c8	402	pr_err("Wrong State: %d\n", sdp->state);
5661f08a SA	403	sdp->state = SDP_STATE_IDLE;
	404	break;
	405	}
	406	debug("%s complete --> %d, %d/%d\n", ep->name,
	407	status, req->actual, req->length);
	408	}
	409
	410	static int sdp_setup(struct usb_function f, const struct usb_ctrlrequest ctrl)
	411	{
	412	struct usb_gadget *gadget = f->config->cdev->gadget;
	413	struct usb_request *req = f->config->cdev->req;
	414	struct f_sdp *sdp = f->config->cdev->req->context;
	415	u16 len = le16_to_cpu(ctrl->wLength);
	416	u16 w_value = le16_to_cpu(ctrl->wValue);
	417	int value = 0;
	418	u8 req_type = ctrl->bRequestType & USB_TYPE_MASK;
	419
	420	debug("w_value: 0x%04x len: 0x%04x\n", w_value, len);
	421	debug("req_type: 0x%02x ctrl->bRequest: 0x%02x sdp->state: %d\n",
	422	req_type, ctrl->bRequest, sdp->state);
	423
	424	if (req_type == USB_TYPE_STANDARD) {
	425	if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR) {
	426	/* Send HID report descriptor */
	427	value = min(len, (u16) sizeof(sdp_hid_report));
	428	memcpy(req->buf, &sdp_hid_report, value);
	429	sdp->configuration_done = true;
	430	}
	431	}
	432
	433	if (req_type == USB_TYPE_CLASS) {
	434	int report = w_value & HID_REPORT_ID_MASK;
	435
	436	/* HID (SDP) request */
	437	switch (ctrl->bRequest) {
	438	case HID_REQ_SET_REPORT:
	439	switch (report) {
	440	case 1:
	441	value = SDP_COMMAND_LEN + 1;
	442	req->complete = sdp_rx_command_complete;
	443	break;
	444	case 2:
	445	value = len;
	446	req->complete = sdp_rx_data_complete;
	447	break;
	448	}
	449	}
	450	}
	451
	452	if (value >= 0) {
	453	req->length = value;
	454	req->zero = value < len;
	455	value = usb_ep_queue(gadget->ep0, req, 0);
	456	if (value < 0) {
	457	debug("ep_queue --> %d\n", value);
	458	req->status = 0;
	459	}
	460	}
	461
	462	return value;
	463	}
	464
	465	static int sdp_bind(struct usb_configuration c, struct usb_function f)
	466	{
467	struct usb_gadget *gadget = c->cdev->gadget;
468	struct usb_composite_dev *cdev = c->cdev;
469	struct f_sdp *sdp = func_to_sdp(f);
470	int rv = 0, id;
471
472	id = usb_interface_id(c, f);
473	if (id < 0)
474	return id;
475	sdp_intf_runtime.bInterfaceNumber = id;
476
477	struct usb_ep *ep;
478
479	/* allocate instance-specific endpoints */
480	ep = usb_ep_autoconfig(gadget, &in_desc);
481	if (!ep) {
482	rv = -ENODEV;
483	goto error;
484	}
485
486	sdp->in_ep = ep; /* Store IN EP for enabling @ setup */
487
488	cdev->req->context = sdp;
489
490	error:
491	return rv;
492	}
493
494	static void sdp_unbind(struct usb_configuration c, struct usb_function f)
495	{
496	free(sdp_func);
497	sdp_func = NULL;
498	}
499
500	static struct usb_request alloc_ep_req(struct usb_ep ep, unsigned length)
501	{
502	struct usb_request *req;
503
504	req = usb_ep_alloc_request(ep, 0);
505	if (!req)
506	return req;
507
508	req->length = length;
509	req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length);
510	if (!req->buf) {
511	usb_ep_free_request(ep, req);
512	req = NULL;
513	}
514
515	return req;
516	}
517
518
519	static struct usb_request sdp_start_ep(struct usb_ep ep)
520	{
521	struct usb_request *req;
522
523	req = alloc_ep_req(ep, 64);
524	debug("%s: ep:%p req:%p\n", __func__, ep, req);
525
526	if (!req)
527	return NULL;
528
529	memset(req->buf, 0, req->length);
530	req->complete = sdp_tx_complete;
531
532	return req;
533	}
534	static int sdp_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
535	{
536	struct f_sdp *sdp = func_to_sdp(f);
537	struct usb_composite_dev *cdev = f->config->cdev;
538	int result;
539
540	debug("%s: intf: %d alt: %d\n", __func__, intf, alt);
541
542	result = usb_ep_enable(sdp->in_ep, &in_desc);
543	if (result)
544	return result;
545	sdp->in_req = sdp_start_ep(sdp->in_ep);
546	sdp->in_req->context = sdp;
547
548	sdp->in_ep->driver_data = cdev; /* claim */
549
550	sdp->altsetting = alt;
551	sdp->state = SDP_STATE_IDLE;
552
553	return 0;
554	}
555
556	static int sdp_get_alt(struct usb_function *f, unsigned intf)
557	{
558	struct f_sdp *sdp = func_to_sdp(f);
559
560	return sdp->altsetting;
561	}
562
563	static void sdp_disable(struct usb_function *f)
564	{
565	struct f_sdp *sdp = func_to_sdp(f);
566
567	usb_ep_disable(sdp->in_ep);
568
569	if (sdp->in_req) {
570	free(sdp->in_req);
571	sdp->in_req = NULL;
572	}
573	}
574
575	static int sdp_bind_config(struct usb_configuration *c)
576	{
577	int status;
578
579	if (!sdp_func) {
580	sdp_func = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*sdp_func));
581	if (!sdp_func)
582	return -ENOMEM;
583	}
584
585	memset(sdp_func, 0, sizeof(*sdp_func));
586
587	sdp_func->usb_function.name = "sdp";
588	sdp_func->usb_function.hs_descriptors = sdp_runtime_descs;
589	sdp_func->usb_function.descriptors = sdp_runtime_descs;
590	sdp_func->usb_function.bind = sdp_bind;
591	sdp_func->usb_function.unbind = sdp_unbind;
592	sdp_func->usb_function.set_alt = sdp_set_alt;
593	sdp_func->usb_function.get_alt = sdp_get_alt;
594	sdp_func->usb_function.disable = sdp_disable;
595	sdp_func->usb_function.strings = sdp_generic_strings;
596	sdp_func->usb_function.setup = sdp_setup;
597
598	status = usb_add_function(c, &sdp_func->usb_function);
599
600	return status;
601	}
602
603	int sdp_init(int controller_index)
604	{
605	printf("SDP: initialize...\n");
606	while (!sdp_func->configuration_done) {
607	if (ctrlc()) {
608	puts("\rCTRL+C - Operation aborted.\n");
609	return 1;
610	}
8171dac0 VP	611
8171dac0 VP	612	WATCHDOG_RESET();
5661f08a SA	613	usb_gadget_handle_interrupts(controller_index);
	614	}
	615
	616	return 0;
	617	}
	618
	619	static u32 sdp_jump_imxheader(void *address)
	620	{
	621	flash_header_v2_t *headerv2 = address;
	622	ulong (*entry)(void);
	623
	624	if (headerv2->header.tag != IVT_HEADER_TAG) {
	625	printf("Header Tag is not an IMX image\n");
	626	return SDP_ERROR_IMXHEADER;
	627	}
	628
	629	printf("Jumping to 0x%08x\n", headerv2->entry);
a64a614d	630	entry = sdp_ptr(headerv2->entry);
5661f08a SA	631	entry();
	632
	633	/* The image probably never returns hence we won't reach that point */
	634	return 0;
	635	}
	636
	637	static void sdp_handle_in_ep(void)
	638	{
	639	u8 *data = sdp_func->in_req->buf;
	640	u32 status;
	641	int datalen;
	642
	643	switch (sdp_func->state) {
	644	case SDP_STATE_TX_SEC_CONF:
	645	debug("Report 3: HAB security\n");
	646	data[0] = 3;
	647
	648	status = SDP_SECURITY_OPEN;
	649	memcpy(&data[1], &status, 4);
	650	sdp_func->in_req->length = 5;
	651	usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0);
	652	sdp_func->state = SDP_STATE_TX_SEC_CONF_BUSY;
	653	break;
	654
	655	case SDP_STATE_TX_STATUS:
	656	debug("Report 4: Status\n");
	657	data[0] = 4;
	658
	659	memcpy(&data[1], &sdp_func->error_status, 4);
	660	sdp_func->in_req->length = 65;
	661	usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0);
	662	sdp_func->state = SDP_STATE_TX_STATUS_BUSY;
	663	break;
	664	case SDP_STATE_TX_REGISTER:
	665	debug("Report 4: Register Values\n");
	666	data[0] = 4;
	667
	668	datalen = sdp_func->dnl_bytes_remaining;
	669
	670	if (datalen > 64)
	671	datalen = 64;
	672
a64a614d	673	memcpy(&data[1], sdp_ptr(sdp_func->dnl_address), datalen);
5661f08a SA	674	sdp_func->in_req->length = 65;
	675
	676	sdp_func->dnl_bytes_remaining -= datalen;
	677	sdp_func->dnl_address += datalen;
	678
	679	usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0);
	680	sdp_func->state = SDP_STATE_TX_REGISTER_BUSY;
	681	break;
	682	case SDP_STATE_JUMP:
ccd7a4d2	683	printf("Jumping to header at 0x%08x\n", sdp_func->jmp_address);
a64a614d	684	status = sdp_jump_imxheader(sdp_ptr(sdp_func->jmp_address));
ccd7a4d2 SA	685
	686	/* If imx header fails, try some U-Boot specific headers */
	687	if (status) {
	688	#ifdef CONFIG_SPL_BUILD
	689	/* In SPL, allow jumps to U-Boot images */
	690	struct spl_image_info spl_image = {};
	691	spl_parse_image_header(&spl_image,
	692	(struct image_header *)sdp_func->jmp_address);
	693	jump_to_image_no_args(&spl_image);
	694	#else
	695	/* In U-Boot, allow jumps to scripts */
	696	source(sdp_func->jmp_address, "script@1");
	697	#endif
	698	}
5661f08a SA	699
	700	sdp_func->next_state = SDP_STATE_IDLE;
	701	sdp_func->error_status = status;
	702
	703	/* Only send Report 4 if there was an error */
	704	if (status)
	705	sdp_func->state = SDP_STATE_TX_STATUS;
	706	else
	707	sdp_func->state = SDP_STATE_IDLE;
	708	break;
	709	default:
	710	break;
	711	};
	712	}
	713
	714	void sdp_handle(int controller_index)
	715	{
	716	printf("SDP: handle requests...\n");
	717	while (1) {
	718	if (ctrlc()) {
	719	puts("\rCTRL+C - Operation aborted.\n");
	720	return;
	721	}
	722
8171dac0	723	WATCHDOG_RESET();
5661f08a SA	724	usb_gadget_handle_interrupts(controller_index);
	725
	726	sdp_handle_in_ep();
	727	}
	728	}
	729
	730	int sdp_add(struct usb_configuration *c)
	731	{
	732	int id;
	733
	734	id = usb_string_id(c->cdev);
	735	if (id < 0)
	736	return id;
	737	strings_sdp_generic[0].id = id;
	738	sdp_intf_runtime.iInterface = id;
	739
	740	debug("%s: cdev: %p gadget: %p gadget->ep0: %p\n", __func__,
	741	c->cdev, c->cdev->gadget, c->cdev->gadget->ep0);
	742
	743	return sdp_bind_config(c);
	744	}
	745
	746	DECLARE_GADGET_BIND_CALLBACK(usb_dnl_sdp, sdp_add);