u-boot/drivers/usb/gadget/f_fastboot.c
Maxime Ripard bf8940d35b fastboot: Implement NAND backend
So far the fastboot code was only supporting MMC-backed devices for its
flashing operations (flash and erase).

Add a storage backend for NAND-backed devices.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-11-12 13:18:58 -05:00

702 lines
17 KiB
C

/*
* (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 <config.h>
#include <common.h>
#include <errno.h>
#include <fastboot.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>
#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
#include <fb_mmc.h>
#endif
#ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
#include <fb_nand.h>
#endif
#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)
#define EP_BUFFER_SIZE 4096
struct f_fastboot {
struct usb_function usb_function;
/* IN/OUT EP's and corresponding 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 fastboot_flash_session_id;
static unsigned int download_size;
static unsigned int download_bytes;
static bool is_high_speed;
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 int strcmp_l1(const char *s1, const char *s2);
void fastboot_fail(char *response, const char *reason)
{
strncpy(response, "FAIL\0", 5);
strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
}
void fastboot_okay(char *response, const char *reason)
{
strncpy(response, "OKAY\0", 5);
strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
}
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);
const char *s;
/* 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;
s = getenv("serial#");
if (s)
g_dnl_set_serialnumber((char *)s);
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);
is_high_speed = true;
} else {
ret = usb_ep_enable(f_fb->out_ep, &fs_ep_out);
is_high_speed = false;
}
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);
static 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;
usb_ep_dequeue(fastboot_func->in_ep, in_req);
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);
}
int __weak fb_set_reboot_flag(void)
{
return -ENOSYS;
}
static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
{
char *cmd = req->buf;
if (!strcmp_l1("reboot-bootloader", cmd)) {
if (fb_set_reboot_flag()) {
fastboot_tx_write_str("FAILCannot set reboot flag");
return;
}
}
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[FASTBOOT_RESPONSE_LEN];
const char *s;
size_t chars_left;
strcpy(response, "OKAY");
chars_left = sizeof(response) - strlen(response) - 1;
strsep(&cmd, ":");
if (!cmd) {
error("missing variable\n");
fastboot_tx_write_str("FAILmissing var");
return;
}
if (!strcmp_l1("version", cmd)) {
strncat(response, FASTBOOT_VERSION, chars_left);
} else if (!strcmp_l1("bootloader-version", cmd)) {
strncat(response, U_BOOT_VERSION, chars_left);
} else if (!strcmp_l1("downloadsize", cmd) ||
!strcmp_l1("max-download-size", cmd)) {
char str_num[12];
sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE);
strncat(response, str_num, chars_left);
/*
* This also indicates the start of a new flashing
* "session", in which we could have 1-N buffers to
* write to a partition.
*
* Reset our session counter.
*/
fastboot_flash_session_id = 0;
} else if (!strcmp_l1("serialno", cmd)) {
s = getenv("serial#");
if (s)
strncat(response, s, chars_left);
else
strcpy(response, "FAILValue not set");
} else {
error("unknown variable: %s\n", cmd);
strcpy(response, "FAILVariable not implemented");
}
fastboot_tx_write_str(response);
}
static unsigned int rx_bytes_expected(unsigned int maxpacket)
{
int rx_remain = download_size - download_bytes;
int rem = 0;
if (rx_remain < 0)
return 0;
if (rx_remain > EP_BUFFER_SIZE)
return EP_BUFFER_SIZE;
if (rx_remain < maxpacket) {
rx_remain = maxpacket;
} else if (rx_remain % maxpacket != 0) {
rem = rx_remain % maxpacket;
rx_remain = rx_remain + (maxpacket - rem);
}
return rx_remain;
}
#define BYTES_PER_DOT 0x20000
static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
{
char response[FASTBOOT_RESPONSE_LEN];
unsigned int transfer_size = download_size - download_bytes;
const unsigned char *buffer = req->buf;
unsigned int buffer_size = req->actual;
unsigned int pre_dot_num, now_dot_num;
unsigned int max;
if (req->status != 0) {
printf("Bad status: %d\n", req->status);
return;
}
if (buffer_size < transfer_size)
transfer_size = buffer_size;
memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes,
buffer, transfer_size);
pre_dot_num = download_bytes / BYTES_PER_DOT;
download_bytes += transfer_size;
now_dot_num = download_bytes / BYTES_PER_DOT;
if (pre_dot_num != now_dot_num) {
putc('.');
if (!(now_dot_num % 74))
putc('\n');
}
/* 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 {
max = is_high_speed ? hs_ep_out.wMaxPacketSize :
fs_ep_out.wMaxPacketSize;
req->length = rx_bytes_expected(max);
if (req->length < ep->maxpacket)
req->length = ep->maxpacket;
}
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[FASTBOOT_RESPONSE_LEN];
unsigned int max;
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_FASTBOOT_BUF_SIZE) {
download_size = 0;
sprintf(response, "FAILdata too large");
} else {
sprintf(response, "DATA%08x", download_size);
req->complete = rx_handler_dl_image;
max = is_high_speed ? hs_ep_out.wMaxPacketSize :
fs_ep_out.wMaxPacketSize;
req->length = rx_bytes_expected(max);
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");
}
static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req)
{
g_dnl_trigger_detach();
}
static void cb_continue(struct usb_ep *ep, struct usb_request *req)
{
fastboot_func->in_req->complete = do_exit_on_complete;
fastboot_tx_write_str("OKAY");
}
#ifdef CONFIG_FASTBOOT_FLASH
static void cb_flash(struct usb_ep *ep, struct usb_request *req)
{
char *cmd = req->buf;
char response[FASTBOOT_RESPONSE_LEN];
strsep(&cmd, ":");
if (!cmd) {
error("missing partition name\n");
fastboot_tx_write_str("FAILmissing partition name");
return;
}
strcpy(response, "FAILno flash device defined");
#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
fb_mmc_flash_write(cmd, fastboot_flash_session_id,
(void *)CONFIG_FASTBOOT_BUF_ADDR,
download_bytes, response);
#endif
#ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
fb_nand_flash_write(cmd, fastboot_flash_session_id,
(void *)CONFIG_FASTBOOT_BUF_ADDR,
download_bytes, response);
#endif
fastboot_flash_session_id++;
fastboot_tx_write_str(response);
}
#endif
static void cb_oem(struct usb_ep *ep, struct usb_request *req)
{
char *cmd = req->buf;
#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
if (strncmp("format", cmd + 4, 6) == 0) {
char cmdbuf[32];
sprintf(cmdbuf, "gpt write mmc %x $partitions",
CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (run_command(cmdbuf, 0))
fastboot_tx_write_str("FAIL");
else
fastboot_tx_write_str("OKAY");
} else
#endif
if (strncmp("unlock", cmd + 4, 8) == 0) {
fastboot_tx_write_str("FAILnot implemented");
}
else {
fastboot_tx_write_str("FAILunknown oem command");
}
}
#ifdef CONFIG_FASTBOOT_FLASH
static void cb_erase(struct usb_ep *ep, struct usb_request *req)
{
char *cmd = req->buf;
char response[FASTBOOT_RESPONSE_LEN];
strsep(&cmd, ":");
if (!cmd) {
error("missing partition name");
fastboot_tx_write_str("FAILmissing partition name");
return;
}
strcpy(response, "FAILno flash device defined");
#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
fb_mmc_erase(cmd, response);
#endif
#ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
fb_nand_erase(cmd, response);
#endif
fastboot_tx_write_str(response);
}
#endif
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,
}, {
.cmd = "continue",
.cb = cb_continue,
},
#ifdef CONFIG_FASTBOOT_FLASH
{
.cmd = "flash",
.cb = cb_flash,
}, {
.cmd = "erase",
.cb = cb_erase,
},
#endif
{
.cmd = "oem",
.cb = cb_oem,
},
};
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;
if (req->status != 0 || req->length == 0)
return;
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) {
error("unknown command: %s\n", cmdbuf);
fastboot_tx_write_str("FAILunknown command");
} else {
if (req->actual < req->length) {
u8 *buf = (u8 *)req->buf;
buf[req->actual] = 0;
func_cb(ep, req);
} else {
error("buffer overflow\n");
fastboot_tx_write_str("FAILbuffer overflow");
}
}
*cmdbuf = '\0';
req->actual = 0;
usb_ep_queue(ep, req, 0);
}