GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
This commit is contained in:
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2008 - 2009
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* Windriver, <www.windriver.com>
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* Tom Rix <Tom.Rix@windriver.com>
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*
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* Copyright 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*
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* Copyright 2014 Linaro, Ltd.
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* Rob Herring <robh@kernel.org>
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*/
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#include <config.h>
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#include <common.h>
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#include <env.h>
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#include <errno.h>
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#include <fastboot.h>
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#include <malloc.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb/composite.h>
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#include <linux/compiler.h>
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#include <g_dnl.h>
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#define FASTBOOT_INTERFACE_CLASS 0xff
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#define FASTBOOT_INTERFACE_SUB_CLASS 0x42
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#define FASTBOOT_INTERFACE_PROTOCOL 0x03
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#define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0 (0x0200)
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#define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1 (0x0040)
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#define TX_ENDPOINT_MAXIMUM_PACKET_SIZE (0x0040)
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#define EP_BUFFER_SIZE 4096
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/*
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* EP_BUFFER_SIZE must always be an integral multiple of maxpacket size
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* (64 or 512 or 1024), else we break on certain controllers like DWC3
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* that expect bulk OUT requests to be divisible by maxpacket size.
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*/
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struct f_fastboot {
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struct usb_function usb_function;
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/* IN/OUT EP's and corresponding requests */
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struct usb_ep *in_ep, *out_ep;
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struct usb_request *in_req, *out_req;
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};
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static inline struct f_fastboot *func_to_fastboot(struct usb_function *f)
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{
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return container_of(f, struct f_fastboot, usb_function);
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}
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static struct f_fastboot *fastboot_func;
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static struct usb_endpoint_descriptor fs_ep_in = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(64),
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};
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static struct usb_endpoint_descriptor fs_ep_out = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(64),
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};
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static struct usb_endpoint_descriptor hs_ep_in = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor hs_ep_out = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_interface_descriptor interface_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bInterfaceNumber = 0x00,
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.bAlternateSetting = 0x00,
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.bNumEndpoints = 0x02,
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.bInterfaceClass = FASTBOOT_INTERFACE_CLASS,
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.bInterfaceSubClass = FASTBOOT_INTERFACE_SUB_CLASS,
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.bInterfaceProtocol = FASTBOOT_INTERFACE_PROTOCOL,
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};
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static struct usb_descriptor_header *fb_fs_function[] = {
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(struct usb_descriptor_header *)&interface_desc,
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(struct usb_descriptor_header *)&fs_ep_in,
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(struct usb_descriptor_header *)&fs_ep_out,
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};
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static struct usb_descriptor_header *fb_hs_function[] = {
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(struct usb_descriptor_header *)&interface_desc,
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(struct usb_descriptor_header *)&hs_ep_in,
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(struct usb_descriptor_header *)&hs_ep_out,
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NULL,
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};
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static struct usb_endpoint_descriptor *
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fb_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
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struct usb_endpoint_descriptor *hs)
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{
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if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
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return hs;
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return fs;
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}
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/*
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* static strings, in UTF-8
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*/
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static const char fastboot_name[] = "Android Fastboot";
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static struct usb_string fastboot_string_defs[] = {
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[0].s = fastboot_name,
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{ } /* end of list */
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};
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static struct usb_gadget_strings stringtab_fastboot = {
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.language = 0x0409, /* en-us */
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.strings = fastboot_string_defs,
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};
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static struct usb_gadget_strings *fastboot_strings[] = {
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&stringtab_fastboot,
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NULL,
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};
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static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
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static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
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{
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int status = req->status;
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if (!status)
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return;
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printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual);
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}
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static int fastboot_bind(struct usb_configuration *c, struct usb_function *f)
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{
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int id;
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struct usb_gadget *gadget = c->cdev->gadget;
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struct f_fastboot *f_fb = func_to_fastboot(f);
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const char *s;
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/* DYNAMIC interface numbers assignments */
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id = usb_interface_id(c, f);
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if (id < 0)
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return id;
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interface_desc.bInterfaceNumber = id;
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id = usb_string_id(c->cdev);
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if (id < 0)
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return id;
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fastboot_string_defs[0].id = id;
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interface_desc.iInterface = id;
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f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in);
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if (!f_fb->in_ep)
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return -ENODEV;
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f_fb->in_ep->driver_data = c->cdev;
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f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out);
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if (!f_fb->out_ep)
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return -ENODEV;
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f_fb->out_ep->driver_data = c->cdev;
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f->descriptors = fb_fs_function;
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if (gadget_is_dualspeed(gadget)) {
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/* Assume endpoint addresses are the same for both speeds */
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hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress;
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hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress;
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/* copy HS descriptors */
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f->hs_descriptors = fb_hs_function;
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}
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s = env_get("serial#");
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if (s)
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g_dnl_set_serialnumber((char *)s);
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return 0;
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}
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static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f)
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{
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memset(fastboot_func, 0, sizeof(*fastboot_func));
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}
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static void fastboot_disable(struct usb_function *f)
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{
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struct f_fastboot *f_fb = func_to_fastboot(f);
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usb_ep_disable(f_fb->out_ep);
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usb_ep_disable(f_fb->in_ep);
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if (f_fb->out_req) {
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free(f_fb->out_req->buf);
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usb_ep_free_request(f_fb->out_ep, f_fb->out_req);
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f_fb->out_req = NULL;
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}
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if (f_fb->in_req) {
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free(f_fb->in_req->buf);
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usb_ep_free_request(f_fb->in_ep, f_fb->in_req);
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f_fb->in_req = NULL;
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}
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}
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static struct usb_request *fastboot_start_ep(struct usb_ep *ep)
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{
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struct usb_request *req;
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req = usb_ep_alloc_request(ep, 0);
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if (!req)
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return NULL;
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req->length = EP_BUFFER_SIZE;
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req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE);
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if (!req->buf) {
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usb_ep_free_request(ep, req);
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return NULL;
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}
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memset(req->buf, 0, req->length);
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return req;
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}
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static int fastboot_set_alt(struct usb_function *f,
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unsigned interface, unsigned alt)
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{
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int ret;
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struct usb_composite_dev *cdev = f->config->cdev;
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struct usb_gadget *gadget = cdev->gadget;
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struct f_fastboot *f_fb = func_to_fastboot(f);
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const struct usb_endpoint_descriptor *d;
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debug("%s: func: %s intf: %d alt: %d\n",
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__func__, f->name, interface, alt);
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d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out);
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ret = usb_ep_enable(f_fb->out_ep, d);
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if (ret) {
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puts("failed to enable out ep\n");
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return ret;
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}
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f_fb->out_req = fastboot_start_ep(f_fb->out_ep);
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if (!f_fb->out_req) {
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puts("failed to alloc out req\n");
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ret = -EINVAL;
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goto err;
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}
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f_fb->out_req->complete = rx_handler_command;
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d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in);
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ret = usb_ep_enable(f_fb->in_ep, d);
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if (ret) {
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puts("failed to enable in ep\n");
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goto err;
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}
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f_fb->in_req = fastboot_start_ep(f_fb->in_ep);
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if (!f_fb->in_req) {
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puts("failed alloc req in\n");
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ret = -EINVAL;
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goto err;
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}
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f_fb->in_req->complete = fastboot_complete;
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ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0);
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if (ret)
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goto err;
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return 0;
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err:
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fastboot_disable(f);
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return ret;
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}
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static int fastboot_add(struct usb_configuration *c)
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{
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struct f_fastboot *f_fb = fastboot_func;
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int status;
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debug("%s: cdev: 0x%p\n", __func__, c->cdev);
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if (!f_fb) {
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f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb));
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if (!f_fb)
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return -ENOMEM;
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fastboot_func = f_fb;
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memset(f_fb, 0, sizeof(*f_fb));
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}
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f_fb->usb_function.name = "f_fastboot";
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f_fb->usb_function.bind = fastboot_bind;
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f_fb->usb_function.unbind = fastboot_unbind;
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f_fb->usb_function.set_alt = fastboot_set_alt;
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f_fb->usb_function.disable = fastboot_disable;
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f_fb->usb_function.strings = fastboot_strings;
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status = usb_add_function(c, &f_fb->usb_function);
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if (status) {
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free(f_fb);
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fastboot_func = f_fb;
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}
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return status;
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}
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DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add);
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static int fastboot_tx_write(const char *buffer, unsigned int buffer_size)
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{
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struct usb_request *in_req = fastboot_func->in_req;
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int ret;
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memcpy(in_req->buf, buffer, buffer_size);
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in_req->length = buffer_size;
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usb_ep_dequeue(fastboot_func->in_ep, in_req);
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ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0);
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if (ret)
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printf("Error %d on queue\n", ret);
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return 0;
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}
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static int fastboot_tx_write_str(const char *buffer)
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{
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return fastboot_tx_write(buffer, strlen(buffer));
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}
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static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
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{
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do_reset(NULL, 0, 0, NULL);
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}
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static unsigned int rx_bytes_expected(struct usb_ep *ep)
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{
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int rx_remain = fastboot_data_remaining();
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unsigned int rem;
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unsigned int maxpacket = ep->maxpacket;
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if (rx_remain <= 0)
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return 0;
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else if (rx_remain > EP_BUFFER_SIZE)
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return EP_BUFFER_SIZE;
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/*
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* Some controllers e.g. DWC3 don't like OUT transfers to be
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* not ending in maxpacket boundary. So just make them happy by
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* always requesting for integral multiple of maxpackets.
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* This shouldn't bother controllers that don't care about it.
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*/
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rem = rx_remain % maxpacket;
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if (rem > 0)
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rx_remain = rx_remain + (maxpacket - rem);
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return rx_remain;
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}
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static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
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{
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char response[FASTBOOT_RESPONSE_LEN] = {0};
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unsigned int transfer_size = fastboot_data_remaining();
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const unsigned char *buffer = req->buf;
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unsigned int buffer_size = req->actual;
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if (req->status != 0) {
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printf("Bad status: %d\n", req->status);
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return;
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}
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if (buffer_size < transfer_size)
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transfer_size = buffer_size;
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fastboot_data_download(buffer, transfer_size, response);
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if (response[0]) {
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fastboot_tx_write_str(response);
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} else if (!fastboot_data_remaining()) {
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fastboot_data_complete(response);
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/*
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* Reset global transfer variable
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*/
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req->complete = rx_handler_command;
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req->length = EP_BUFFER_SIZE;
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fastboot_tx_write_str(response);
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} else {
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req->length = rx_bytes_expected(ep);
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}
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req->actual = 0;
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usb_ep_queue(ep, req, 0);
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}
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static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req)
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{
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g_dnl_trigger_detach();
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}
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static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req)
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{
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fastboot_boot();
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do_exit_on_complete(ep, req);
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}
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static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
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{
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char *cmdbuf = req->buf;
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char response[FASTBOOT_RESPONSE_LEN] = {0};
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int cmd = -1;
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if (req->status != 0 || req->length == 0)
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return;
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if (req->actual < req->length) {
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cmdbuf[req->actual] = '\0';
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cmd = fastboot_handle_command(cmdbuf, response);
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} else {
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pr_err("buffer overflow");
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fastboot_fail("buffer overflow", response);
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}
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if (!strncmp("DATA", response, 4)) {
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req->complete = rx_handler_dl_image;
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req->length = rx_bytes_expected(ep);
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}
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fastboot_tx_write_str(response);
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if (!strncmp("OKAY", response, 4)) {
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switch (cmd) {
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case FASTBOOT_COMMAND_BOOT:
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fastboot_func->in_req->complete = do_bootm_on_complete;
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break;
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case FASTBOOT_COMMAND_CONTINUE:
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fastboot_func->in_req->complete = do_exit_on_complete;
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break;
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case FASTBOOT_COMMAND_REBOOT:
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case FASTBOOT_COMMAND_REBOOT_BOOTLOADER:
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fastboot_func->in_req->complete = compl_do_reset;
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break;
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}
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}
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*cmdbuf = '\0';
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req->actual = 0;
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usb_ep_queue(ep, req, 0);
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}
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