diff options
Diffstat (limited to 'drivers/usb/gadget/f_fastboot.c')
| -rw-r--r-- | drivers/usb/gadget/f_fastboot.c | 513 |
1 files changed, 513 insertions, 0 deletions
diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c new file mode 100644 index 0000000000..9dd85b636e --- /dev/null +++ b/drivers/usb/gadget/f_fastboot.c @@ -0,0 +1,513 @@ +/* + * (C) Copyright 2008 - 2009 + * Windriver, <www.windriver.com> + * Tom Rix <Tom.Rix@windriver.com> + * + * Copyright 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * Copyright 2014 Linaro, Ltd. + * Rob Herring <robh@kernel.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <errno.h> +#include <malloc.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb/composite.h> +#include <linux/compiler.h> +#include <version.h> +#include <g_dnl.h> + +#define FASTBOOT_VERSION "0.4" + +#define FASTBOOT_INTERFACE_CLASS 0xff +#define FASTBOOT_INTERFACE_SUB_CLASS 0x42 +#define FASTBOOT_INTERFACE_PROTOCOL 0x03 + +#define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0 (0x0200) +#define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1 (0x0040) +#define TX_ENDPOINT_MAXIMUM_PACKET_SIZE (0x0040) + +/* The 64 defined bytes plus \0 */ +#define RESPONSE_LEN (64 + 1) + +#define EP_BUFFER_SIZE 4096 + +struct f_fastboot { + struct usb_function usb_function; + + /* IN/OUT EP's and correspoinding requests */ + struct usb_ep *in_ep, *out_ep; + struct usb_request *in_req, *out_req; +}; + +static inline struct f_fastboot *func_to_fastboot(struct usb_function *f) +{ + return container_of(f, struct f_fastboot, usb_function); +} + +static struct f_fastboot *fastboot_func; +static unsigned int download_size; +static unsigned int download_bytes; + +static struct usb_endpoint_descriptor fs_ep_in = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = USB_DIR_IN, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .wMaxPacketSize = TX_ENDPOINT_MAXIMUM_PACKET_SIZE, + .bInterval = 0x00, +}; + +static struct usb_endpoint_descriptor fs_ep_out = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = USB_DIR_OUT, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .wMaxPacketSize = RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1, + .bInterval = 0x00, +}; + +static struct usb_endpoint_descriptor hs_ep_out = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = USB_DIR_OUT, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .wMaxPacketSize = RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0, + .bInterval = 0x00, +}; + +static struct usb_interface_descriptor interface_desc = { + .bLength = USB_DT_INTERFACE_SIZE, + .bDescriptorType = USB_DT_INTERFACE, + .bInterfaceNumber = 0x00, + .bAlternateSetting = 0x00, + .bNumEndpoints = 0x02, + .bInterfaceClass = FASTBOOT_INTERFACE_CLASS, + .bInterfaceSubClass = FASTBOOT_INTERFACE_SUB_CLASS, + .bInterfaceProtocol = FASTBOOT_INTERFACE_PROTOCOL, +}; + +static struct usb_descriptor_header *fb_runtime_descs[] = { + (struct usb_descriptor_header *)&interface_desc, + (struct usb_descriptor_header *)&fs_ep_in, + (struct usb_descriptor_header *)&hs_ep_out, + NULL, +}; + +/* + * static strings, in UTF-8 + */ +static const char fastboot_name[] = "Android Fastboot"; + +static struct usb_string fastboot_string_defs[] = { + [0].s = fastboot_name, + { } /* end of list */ +}; + +static struct usb_gadget_strings stringtab_fastboot = { + .language = 0x0409, /* en-us */ + .strings = fastboot_string_defs, +}; + +static struct usb_gadget_strings *fastboot_strings[] = { + &stringtab_fastboot, + NULL, +}; + +static void rx_handler_command(struct usb_ep *ep, struct usb_request *req); + +static void fastboot_complete(struct usb_ep *ep, struct usb_request *req) +{ + int status = req->status; + if (!status) + return; + printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual); +} + +static int fastboot_bind(struct usb_configuration *c, struct usb_function *f) +{ + int id; + struct usb_gadget *gadget = c->cdev->gadget; + struct f_fastboot *f_fb = func_to_fastboot(f); + + /* DYNAMIC interface numbers assignments */ + id = usb_interface_id(c, f); + if (id < 0) + return id; + interface_desc.bInterfaceNumber = id; + + id = usb_string_id(c->cdev); + if (id < 0) + return id; + fastboot_string_defs[0].id = id; + interface_desc.iInterface = id; + + f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in); + if (!f_fb->in_ep) + return -ENODEV; + f_fb->in_ep->driver_data = c->cdev; + + f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out); + if (!f_fb->out_ep) + return -ENODEV; + f_fb->out_ep->driver_data = c->cdev; + + hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress; + + return 0; +} + +static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f) +{ + memset(fastboot_func, 0, sizeof(*fastboot_func)); +} + +static void fastboot_disable(struct usb_function *f) +{ + struct f_fastboot *f_fb = func_to_fastboot(f); + + usb_ep_disable(f_fb->out_ep); + usb_ep_disable(f_fb->in_ep); + + if (f_fb->out_req) { + free(f_fb->out_req->buf); + usb_ep_free_request(f_fb->out_ep, f_fb->out_req); + f_fb->out_req = NULL; + } + if (f_fb->in_req) { + free(f_fb->in_req->buf); + usb_ep_free_request(f_fb->in_ep, f_fb->in_req); + f_fb->in_req = NULL; + } +} + +static struct usb_request *fastboot_start_ep(struct usb_ep *ep) +{ + struct usb_request *req; + + req = usb_ep_alloc_request(ep, 0); + if (!req) + return NULL; + + req->length = EP_BUFFER_SIZE; + req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE); + if (!req->buf) { + usb_ep_free_request(ep, req); + return NULL; + } + + memset(req->buf, 0, req->length); + return req; +} + +static int fastboot_set_alt(struct usb_function *f, + unsigned interface, unsigned alt) +{ + int ret; + struct usb_composite_dev *cdev = f->config->cdev; + struct usb_gadget *gadget = cdev->gadget; + struct f_fastboot *f_fb = func_to_fastboot(f); + + debug("%s: func: %s intf: %d alt: %d\n", + __func__, f->name, interface, alt); + + /* make sure we don't enable the ep twice */ + if (gadget->speed == USB_SPEED_HIGH) + ret = usb_ep_enable(f_fb->out_ep, &hs_ep_out); + else + ret = usb_ep_enable(f_fb->out_ep, &fs_ep_out); + if (ret) { + puts("failed to enable out ep\n"); + return ret; + } + + f_fb->out_req = fastboot_start_ep(f_fb->out_ep); + if (!f_fb->out_req) { + puts("failed to alloc out req\n"); + ret = -EINVAL; + goto err; + } + f_fb->out_req->complete = rx_handler_command; + + ret = usb_ep_enable(f_fb->in_ep, &fs_ep_in); + if (ret) { + puts("failed to enable in ep\n"); + goto err; + } + + f_fb->in_req = fastboot_start_ep(f_fb->in_ep); + if (!f_fb->in_req) { + puts("failed alloc req in\n"); + ret = -EINVAL; + goto err; + } + f_fb->in_req->complete = fastboot_complete; + + ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0); + if (ret) + goto err; + + return 0; +err: + fastboot_disable(f); + return ret; +} + +static int fastboot_add(struct usb_configuration *c) +{ + struct f_fastboot *f_fb = fastboot_func; + int status; + + debug("%s: cdev: 0x%p\n", __func__, c->cdev); + + if (!f_fb) { + f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb)); + if (!f_fb) + return -ENOMEM; + + fastboot_func = f_fb; + memset(f_fb, 0, sizeof(*f_fb)); + } + + f_fb->usb_function.name = "f_fastboot"; + f_fb->usb_function.hs_descriptors = fb_runtime_descs; + f_fb->usb_function.bind = fastboot_bind; + f_fb->usb_function.unbind = fastboot_unbind; + f_fb->usb_function.set_alt = fastboot_set_alt; + f_fb->usb_function.disable = fastboot_disable; + f_fb->usb_function.strings = fastboot_strings; + + status = usb_add_function(c, &f_fb->usb_function); + if (status) { + free(f_fb); + fastboot_func = f_fb; + } + + return status; +} +DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add); + +int fastboot_tx_write(const char *buffer, unsigned int buffer_size) +{ + struct usb_request *in_req = fastboot_func->in_req; + int ret; + + memcpy(in_req->buf, buffer, buffer_size); + in_req->length = buffer_size; + ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0); + if (ret) + printf("Error %d on queue\n", ret); + return 0; +} + +static int fastboot_tx_write_str(const char *buffer) +{ + return fastboot_tx_write(buffer, strlen(buffer)); +} + +static void compl_do_reset(struct usb_ep *ep, struct usb_request *req) +{ + do_reset(NULL, 0, 0, NULL); +} + +static void cb_reboot(struct usb_ep *ep, struct usb_request *req) +{ + fastboot_func->in_req->complete = compl_do_reset; + fastboot_tx_write_str("OKAY"); +} + +static int strcmp_l1(const char *s1, const char *s2) +{ + if (!s1 || !s2) + return -1; + return strncmp(s1, s2, strlen(s1)); +} + +static void cb_getvar(struct usb_ep *ep, struct usb_request *req) +{ + char *cmd = req->buf; + char response[RESPONSE_LEN]; + const char *s; + + strcpy(response, "OKAY"); + strsep(&cmd, ":"); + if (!cmd) { + fastboot_tx_write_str("FAILmissing var"); + return; + } + + if (!strcmp_l1("version", cmd)) { + strncat(response, FASTBOOT_VERSION, sizeof(response)); + } else if (!strcmp_l1("bootloader-version", cmd)) { + strncat(response, U_BOOT_VERSION, sizeof(response)); + } else if (!strcmp_l1("downloadsize", cmd)) { + char str_num[12]; + + sprintf(str_num, "%08x", CONFIG_USB_FASTBOOT_BUF_SIZE); + strncat(response, str_num, sizeof(response)); + } else if (!strcmp_l1("serialno", cmd)) { + s = getenv("serial#"); + if (s) + strncat(response, s, sizeof(response)); + else + strcpy(response, "FAILValue not set"); + } else { + strcpy(response, "FAILVariable not implemented"); + } + fastboot_tx_write_str(response); +} + +static unsigned int rx_bytes_expected(void) +{ + int rx_remain = download_size - download_bytes; + if (rx_remain < 0) + return 0; + if (rx_remain > EP_BUFFER_SIZE) + return EP_BUFFER_SIZE; + return rx_remain; +} + +#define BYTES_PER_DOT 0x20000 +static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req) +{ + char response[RESPONSE_LEN]; + unsigned int transfer_size = download_size - download_bytes; + const unsigned char *buffer = req->buf; + unsigned int buffer_size = req->actual; + + if (req->status != 0) { + printf("Bad status: %d\n", req->status); + return; + } + + if (buffer_size < transfer_size) + transfer_size = buffer_size; + + memcpy((void *)CONFIG_USB_FASTBOOT_BUF_ADDR + download_bytes, + buffer, transfer_size); + + download_bytes += transfer_size; + + /* Check if transfer is done */ + if (download_bytes >= download_size) { + /* + * Reset global transfer variable, keep download_bytes because + * it will be used in the next possible flashing command + */ + download_size = 0; + req->complete = rx_handler_command; + req->length = EP_BUFFER_SIZE; + + sprintf(response, "OKAY"); + fastboot_tx_write_str(response); + + printf("\ndownloading of %d bytes finished\n", download_bytes); + } else { + req->length = rx_bytes_expected(); + if (req->length < ep->maxpacket) + req->length = ep->maxpacket; + } + + if (download_bytes && !(download_bytes % BYTES_PER_DOT)) { + putc('.'); + if (!(download_bytes % (74 * BYTES_PER_DOT))) + putc('\n'); + } + req->actual = 0; + usb_ep_queue(ep, req, 0); +} + +static void cb_download(struct usb_ep *ep, struct usb_request *req) +{ + char *cmd = req->buf; + char response[RESPONSE_LEN]; + + strsep(&cmd, ":"); + download_size = simple_strtoul(cmd, NULL, 16); + download_bytes = 0; + + printf("Starting download of %d bytes\n", download_size); + + if (0 == download_size) { + sprintf(response, "FAILdata invalid size"); + } else if (download_size > CONFIG_USB_FASTBOOT_BUF_SIZE) { + download_size = 0; + sprintf(response, "FAILdata too large"); + } else { + sprintf(response, "DATA%08x", download_size); + req->complete = rx_handler_dl_image; + req->length = rx_bytes_expected(); + if (req->length < ep->maxpacket) + req->length = ep->maxpacket; + } + fastboot_tx_write_str(response); +} + +static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req) +{ + char boot_addr_start[12]; + char *bootm_args[] = { "bootm", boot_addr_start, NULL }; + + puts("Booting kernel..\n"); + + sprintf(boot_addr_start, "0x%lx", load_addr); + do_bootm(NULL, 0, 2, bootm_args); + + /* This only happens if image is somehow faulty so we start over */ + do_reset(NULL, 0, 0, NULL); +} + +static void cb_boot(struct usb_ep *ep, struct usb_request *req) +{ + fastboot_func->in_req->complete = do_bootm_on_complete; + fastboot_tx_write_str("OKAY"); +} + +struct cmd_dispatch_info { + char *cmd; + void (*cb)(struct usb_ep *ep, struct usb_request *req); +}; + +static const struct cmd_dispatch_info cmd_dispatch_info[] = { + { + .cmd = "reboot", + .cb = cb_reboot, + }, { + .cmd = "getvar:", + .cb = cb_getvar, + }, { + .cmd = "download:", + .cb = cb_download, + }, { + .cmd = "boot", + .cb = cb_boot, + }, +}; + +static void rx_handler_command(struct usb_ep *ep, struct usb_request *req) +{ + char *cmdbuf = req->buf; + void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL; + int i; + + for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) { + if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) { + func_cb = cmd_dispatch_info[i].cb; + break; + } + } + + if (!func_cb) + fastboot_tx_write_str("FAILunknown command"); + else + func_cb(ep, req); + + if (req->status == 0) { + *cmdbuf = '\0'; + req->actual = 0; + usb_ep_queue(ep, req, 0); + } +} |