*/
#include <hw/usb_client.h>
-#include <hw/systemd.h>
-#include <hw/shared.h>
-
-#include <limits.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/mount.h>
-#include <usbg/usbg.h>
-#include <unistd.h>
-
-#include <unistd.h>
-
-#define zalloc(amount) calloc(1, amount)
-
-#define MAX_GADGET_STR_LEN 256
-#define MAX_FUNCS 32
-
-#define CONFIGFS_PATH "/sys/kernel/config"
-
-#define CONFIGFS_GADGET_NAME "hal-gadget"
-#define CONFIGFS_CONFIG_LABEL "hal-config"
-
-#define NAME_INSTANCE_SEP '.'
-#define MAX_INSTANCE_LEN 512
-
-#define USB_FUNCS_PATH "/dev/usb-funcs/"
-
-struct cfs_client {
- struct usb_client client;
- usbg_state *ctx;
- usbg_gadget *gadget;
- usbg_udc *udc;
-};
-
-/* Based on values in slp-gadget kernel module */
-struct usbg_gadget_attrs default_g_attrs = {
- .bcdUSB = 0x0200,
- .idVendor = 0x04e8,
- .idProduct = 0x6860,
- .bcdDevice = 0x0100,
-};
-
-struct usbg_gadget_strs default_g_strs = {
- .manufacturer = "Samsung",
- .product = "TIZEN",
- .serial = "01234TEST",
-};
-
-static void cfs_free_config(struct usb_configuration *config)
-{
- int i;
-
- if (!config)
- return;
-
- if (config->strs) {
- for (i = 0; config->strs[i].lang_code; ++i)
- free(config->strs[i].config_str);
-
- free(config->strs);
- }
-
- /*
- * Each function will be free later,
- * for now we cleanup only pointers.
- */
- if (config->funcs)
- free(config->funcs);
-
- free(config);
-}
-
-static void cfs_free_gadget(struct usb_gadget *gadget)
-{
- int i;
-
- if (!gadget)
- return;
-
- if (gadget->strs) {
- for (i = 0; gadget->strs[i].lang_code; ++i) {
- free(gadget->strs[i].manufacturer);
- free(gadget->strs[i].product);
- free(gadget->strs[i].serial);
- }
- free(gadget->strs);
- }
-
- if (gadget->configs) {
- for (i = 0; gadget->configs[i]; ++i)
- cfs_free_config(gadget->configs[i]);
-
- free(gadget->configs);
- }
-
- if (gadget->funcs) {
- for (i = 0; gadget->funcs[i]; ++i)
- gadget->funcs[i]->free_func(gadget->funcs[i]);
-
- free(gadget->funcs);
- }
-}
-
-static int cfs_read_gadget_attrs_strs(usbg_gadget *gadget,
- struct usb_gadget *usb_gadget)
-{
- struct usbg_gadget_attrs attrs;
- struct usbg_gadget_strs strs;
- int ret;
-
- ret = usbg_get_gadget_attrs(gadget, &attrs);
- if (ret)
- goto out;
-
- usb_gadget->attrs.bDeviceClass = attrs.bDeviceClass;
- usb_gadget->attrs.bDeviceSubClass = attrs.bDeviceSubClass;
- usb_gadget->attrs.bDeviceProtocol = attrs.bDeviceProtocol;
- usb_gadget->attrs.idVendor = attrs.idVendor;
- usb_gadget->attrs.idProduct = attrs.idProduct;
- usb_gadget->attrs.bcdDevice = attrs.bcdDevice;
-
-
- ret = usbg_get_gadget_strs(gadget, LANG_US_ENG, &strs);
- if (ret)
- goto out;
-
- usb_gadget->strs[0].manufacturer = strdup(strs.manufacturer);
- usb_gadget->strs[0].product = strdup(strs.product);
- usb_gadget->strs[0].serial = strdup(strs.serial);
-
- if (!usb_gadget->strs[0].manufacturer ||
- !usb_gadget->strs[0].product ||
- !usb_gadget->strs[0].serial) {
- ret = -ENOMEM;
- goto err_strs;
- }
-
- return 0;
-err_strs:
- free(usb_gadget->strs[0].manufacturer);
- free(usb_gadget->strs[0].product);
- free(usb_gadget->strs[0].serial);
-out:
- return ret;
-}
-
-static bool cfs_match_func(struct usb_function *f,
- const char *name, const char *instance) {
- if (strcmp(name, usbg_get_function_type_str(USBG_F_FFS))) {
- /* Standard functions */
- if (!strcmp(name, f->name) && !strcmp(instance, f->instance))
- return true;
- } else {
- /* Function with service */
- const char *sep, *fname, *finst;
- int len;
-
- sep = strchr(instance, NAME_INSTANCE_SEP);
- if (!sep || strlen(sep + 1) < 1)
- return false;
-
- fname = instance;
- len = sep - instance;
- finst = sep + 1;
-
- if (strlen(f->name) == len
- && !strncmp(f->name, fname, len)
- && !strcmp(f->instance, finst))
- return true;
- }
-
- return false;
-}
-
-
-static int cfs_find_func(const char *name, const char *instance)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(_available_funcs); ++i)
- if (cfs_match_func(_available_funcs[i], name, instance))
- return i;
-
- return -ENOENT;
-}
-
-static int cfs_alloc_new_func(struct usb_gadget *gadget, const char *fname,
- const char *instance, struct usb_function **_func)
-{
- struct usb_function *func;
- int ret;
-
- ret = cfs_find_func(fname, instance);
- if (ret < 0)
- return -ENOTSUP;
-
- ret = _available_funcs[ret]->clone(_available_funcs[ret], &func);
- if (ret)
- return ret;
-
- *_func = func;
- return 0;
-}
-
-static int cfs_read_funcs(usbg_gadget *gadget, struct usb_gadget *usb_gadget)
-{
- usbg_function *func;
- int i;
- int ret;
-
- i = 0;
- usbg_for_each_function(func, gadget) {
- char *func_name = (char *)usbg_get_function_type_str(
- usbg_get_function_type(func));
- char *instance = (char *)usbg_get_function_instance(func);
-
- ret = cfs_alloc_new_func(usb_gadget, func_name, instance,
- usb_gadget->funcs + i);
- if (ret < 0)
- goto clean_prev;
- ++i;
- }
-
- return 0;
-clean_prev:
- while (i >= 0) {
- usb_gadget->funcs[i]->free_func(usb_gadget->funcs[i]);
- --i;
- }
-
- return ret;
-}
-
-static struct usb_function *cfs_find_func_in_gadget(
- struct usb_gadget *gadget, const char *name, const char *instance)
-{
- int i;
-
- for (i = 0; gadget->funcs[i]; ++i)
- if (cfs_match_func(gadget->funcs[i], name, instance))
- return gadget->funcs[i];
-
- return NULL;
-}
-
-static int cfs_alloc_config(int n_funcs, struct usb_configuration **_config)
-{
- struct usb_configuration *config;
-
- config = zalloc(sizeof(*config));
- if (!config)
- goto out;
-
- config->strs = calloc(2, sizeof(*config->strs));
- if (!config->strs)
- goto free_config;
-
- config->funcs = calloc(n_funcs + 1, sizeof(*config->funcs));
- if (!config->funcs)
- goto free_strs;
-
- *_config = config;
-
- return 0;
-free_strs:
- free(config->strs);
-free_config:
- free(config);
-out:
- return -ENOMEM;
-}
-
-static int cfs_read_config(usbg_config *config, struct usb_gadget *gadget,
- struct usb_configuration *usb_config)
-{
- usbg_binding *b;
- usbg_function *func;
- char *name, *instance;
- struct usbg_config_attrs c_attrs;
- struct usbg_config_strs c_strs;
- int i = 0;
- int ret;
-
- usbg_for_each_binding(b, config) {
- func = usbg_get_binding_target(b);
-
- name = (char *)usbg_get_function_type_str(
- usbg_get_function_type(func));
- instance = (char *)usbg_get_function_instance(func);
-
- usb_config->funcs[i] = cfs_find_func_in_gadget(gadget,
- name, instance);
- if (!usb_config->funcs[i]) {
- return -ENOTSUP;
- }
- ++i;
- }
-
- ret = usbg_get_config_attrs(config, &c_attrs);
- if (ret)
- return ret;
-
- usb_config->attrs.MaxPower = c_attrs.bMaxPower*2;
- usb_config->attrs.bmAttributs = c_attrs.bmAttributes;
-
- ret = usbg_get_config_strs(config, LANG_US_ENG, &c_strs);
- if (ret) {
- usb_config->strs[0].lang_code = 0;
- } else {
- usb_config->strs[0].lang_code = LANG_US_ENG;
- usb_config->strs[0].config_str = strdup(c_strs.configuration);
- if (!usb_config->strs[0].config_str)
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static int cfs_count_bindings(usbg_config *config)
-{
- usbg_binding *b;
- int i = 0;
-
- usbg_for_each_binding(b, config) ++i;
-
- return i;
-}
-
-static int cfs_read_configs(usbg_gadget *gadget, struct usb_gadget *usb_gadget)
-{
- usbg_config *config;
- int i = 0;
- int n_funcs;
- int ret;
-
- usbg_for_each_config(config, gadget) {
- n_funcs = cfs_count_bindings(config);
-
- ret = cfs_alloc_config(n_funcs, usb_gadget->configs + i);
- if (ret)
- goto clean_prev;
- ret = cfs_read_config(config, usb_gadget,
- usb_gadget->configs[i]);
- if (ret)
- goto free_current;
-
- ++i;
- }
-
- return 0;
-free_current:
- free(usb_gadget->configs[i]->strs);
- free(usb_gadget->configs[i]->funcs);
- free(usb_gadget->configs[i]);
-clean_prev:
- while (i >= 0)
- cfs_free_config(usb_gadget->configs[i--]);
- return ret;
-}
-
-static int cfs_count_configs(usbg_gadget *gadget)
-{
- usbg_config *config;
- int i = 0;
-
- usbg_for_each_config(config, gadget) ++i;
-
- return i;
-}
-
-static int cfs_count_functions(usbg_gadget *gadget)
-{
- usbg_function *func;
- int i = 0;
-
- usbg_for_each_function(func, gadget) ++i;
-
- return i;
-}
-
-static int cfs_get_current_gadget(struct usb_client *usb,
- struct usb_gadget **_usb_gadget)
-{
- struct cfs_client *cfs_client;
- struct usb_gadget *usb_gadget;
- struct usb_gadget_strings *strs;
- struct usb_configuration **usb_configs;
- struct usb_function **usb_funcs;
- int n_funcs, n_configs;
- int i;
- int ret = -ENOMEM;
-
- if (!usb)
- return -EINVAL;
-
- cfs_client = container_of(usb, struct cfs_client,
- client);
-
- usb_gadget = zalloc(sizeof(*usb_gadget));
- if (!usb_gadget)
- goto out;
-
- /*
- * Currently there is no interface in libusbg which
- * allows to list all string languages.
- * That's why we do this only for USA english
- */
- strs = calloc(2, sizeof(*strs));
- if (!strs)
- goto free_gadget;
-
- strs[0].lang_code = LANG_US_ENG;
-
- usb_gadget->strs = strs;
-
- ret = cfs_read_gadget_attrs_strs(cfs_client->gadget, usb_gadget);
- if (ret)
- goto free_strs;
-
-
- n_funcs = cfs_count_functions(cfs_client->gadget);
- usb_funcs = calloc(n_funcs + 1, sizeof(*usb_funcs));
- if (!usb_funcs)
- goto free_strs_with_content;
-
- usb_gadget->funcs = usb_funcs;
-
- ret = cfs_read_funcs(cfs_client->gadget, usb_gadget);
- if (ret)
- goto free_funcs;
-
- n_configs = cfs_count_configs(cfs_client->gadget);
- usb_configs = calloc(n_configs + 1, sizeof(*usb_configs));
- if (!usb_configs)
- goto free_funcs_with_content;
-
- usb_gadget->configs = usb_configs;
-
- ret = cfs_read_configs(cfs_client->gadget, usb_gadget);
- if (ret)
- goto free_configs;
-
- *_usb_gadget = usb_gadget;
- return 0;
-
-free_configs:
- free(usb_configs);
-free_funcs_with_content:
- for (i = 0; usb_gadget->funcs[i]; ++i)
- usb_gadget->funcs[i]->free_func(usb_gadget->funcs[i]);
-free_funcs:
- free(usb_funcs);
-free_strs_with_content:
- for (i = 0; usb_gadget->strs[i].lang_code; ++i) {
- free(usb_gadget->strs[i].manufacturer);
- free(usb_gadget->strs[i].product);
- free(usb_gadget->strs[i].serial);
- }
-free_strs:
- free(usb_gadget->strs);
-free_gadget:
- free(usb_gadget);
-out:
- return ret;
-}
-
-static bool cfs_is_function_supported(struct usb_client *usb,
- struct usb_function *func)
-{
- bool res;
- int ret;
-
- switch (func->function_group) {
- case USB_FUNCTION_GROUP_SIMPLE:
- ret = usbg_lookup_function_type(func->name);
- res = ret >= 0;
- break;
- case USB_FUNCTION_GROUP_WITH_SERVICE:
- /* TODO: Check if socket is available */
- res = true;
- break;
- default:
- res = false;
- }
-
- return res;
-}
-
-static bool cfs_is_gadget_supported(struct usb_client *usb,
- struct usb_gadget *gadget)
-{
- int i, j;
-
- if (!gadget || !gadget->configs || !gadget->funcs)
- return false;
-
- /*
- * TODO
- * Here is a good place to ensure that serial is immutable
- */
-
- /* No real restrictions for strings */
- for (j = 0; gadget->configs && gadget->configs[j]; ++j) {
- struct usb_configuration *config = gadget->configs[j];
-
- if (!config->funcs)
- return false;
-
- for (i = 0; config->funcs[i]; ++i)
- if (!cfs_is_function_supported(usb, config->funcs[i]))
- return false;
- }
-
- if (j == 0)
- return false;
-
- return true;
-}
-
-static int cfs_set_gadget_attrs(struct cfs_client *cfs_client,
- struct usb_gadget_attrs *attrs)
-{
- int ret;
- struct usbg_gadget_attrs gadget_attrs;
-
- ret = usbg_get_gadget_attrs(cfs_client->gadget, &gadget_attrs);
- if (ret)
- return ret;
-
- gadget_attrs.bDeviceClass = attrs->bDeviceClass;
- gadget_attrs.bDeviceSubClass = attrs->bDeviceSubClass;
- gadget_attrs.bDeviceProtocol = attrs->bDeviceProtocol;
- gadget_attrs.idVendor = attrs->idVendor;
- gadget_attrs.idProduct = attrs->idProduct;
- gadget_attrs.bcdDevice = attrs->bcdDevice;
-
- ret = usbg_set_gadget_attrs(cfs_client->gadget, &gadget_attrs);
-
- return ret;
-}
-
-static int cfs_set_gadget_strs(struct cfs_client *cfs_client,
- struct usb_gadget_strings *strs)
-{
- int ret = 0;
-
- /*
- * TODO
- * Here is a good place to ensure that serial is immutable
- */
-#define SET_STR(FIELD, STR_ID) \
- if (strs->FIELD) { \
- ret = usbg_set_gadget_str(cfs_client->gadget, \
- STR_ID, \
- strs->lang_code, \
- strs->FIELD); \
- if (ret) \
- return ret; \
- }
-
- SET_STR(manufacturer, USBG_STR_MANUFACTURER);
- SET_STR(product, USBG_STR_PRODUCT);
- SET_STR(serial, USBG_STR_SERIAL_NUMBER);
-#undef SET_STR
- return ret;
-}
-
-static int cfs_ensure_dir(char *path)
-{
- int ret;
-
- ret = mkdir(path, 0770);
- if (ret < 0)
- ret = errno == EEXIST ? 0 : errno;
-
- return ret;
-}
-
-static int cfs_prep_ffs_service(const char *name, const char *instance,
- const char *dev_name, const char *socket_name)
-{
- char buf[PATH_MAX];
- size_t left;
- char *pos;
- int ret;
-
- /* TODO: Add some good error handling */
-
- left = sizeof(buf);
- pos = buf;
- ret = snprintf(pos, left, "%s", USB_FUNCS_PATH);
- if (ret < 0 || ret >= left) {
- return -ENAMETOOLONG;
- } else {
- left -= ret;
- pos += ret;
- }
- ret = cfs_ensure_dir(buf);
- if (ret < 0)
- return ret;
-
- ret = snprintf(pos, left, "/%s", name);
- if (ret < 0 || ret >= left) {
- return -ENAMETOOLONG;
- } else {
- left -= ret;
- pos += ret;
- }
- ret = cfs_ensure_dir(buf);
- if (ret < 0)
- return ret;
-
- ret = snprintf(pos, left, "/%s", instance);
- if (ret < 0 || ret >= left) {
- return -ENAMETOOLONG;
- } else {
- left -= ret;
- pos += ret;
- }
- ret = cfs_ensure_dir(buf);
- if (ret < 0)
- return ret;
-
- ret = mount(dev_name, buf, "functionfs", 0, NULL);
- if (ret < 0)
- return ret;
-
- ret = systemd_start_socket(socket_name);
- if (ret < 0)
- goto umount_ffs;
-
- return 0;
-umount_ffs:
- umount(buf);
- return ret;
-}
-
-static int cfs_set_gadget_config(struct cfs_client *cfs_client,
- int config_id,
- struct usb_configuration *usb_config)
-{
- struct usbg_config_attrs cattrs = {
- .bmAttributes = usb_config->attrs.bmAttributs,
- .bMaxPower = usb_config->attrs.MaxPower/2,
- };
- usbg_config *config;
- int i;
- int ret;
-
- if (!usb_config->funcs || !usb_config->funcs[0])
- return -EINVAL;
-
- config = usbg_get_config(cfs_client->gadget, config_id, NULL);
- if (config) {
- ret = usbg_rm_config(config, USBG_RM_RECURSE);
- if (ret)
- return ret;
- }
-
- ret = usbg_create_config(cfs_client->gadget, config_id,
- CONFIGFS_CONFIG_LABEL, &cattrs, NULL, &config);
- if (ret)
- return ret;
-
- for (i = 0; usb_config->strs && usb_config->strs[i].lang_code; ++i) {
- ret = usbg_set_config_string(config, usb_config->strs[i].lang_code,
- usb_config->strs[i].config_str);
- if (ret)
- return ret;
- }
-
- for (i = 0; usb_config->funcs && usb_config->funcs[i]; ++i) {
- struct usb_function *usb_func = usb_config->funcs[i];
- char instance[MAX_INSTANCE_LEN];
- int type;
- usbg_function *func;
-
- switch (usb_func->function_group) {
- case USB_FUNCTION_GROUP_SIMPLE:
- type = usbg_lookup_function_type(usb_func->name);
- if (strlen(usb_func->instance) >= MAX_INSTANCE_LEN)
- return -ENAMETOOLONG;
- strncpy(instance, usb_func->instance, MAX_INSTANCE_LEN);
- instance[MAX_INSTANCE_LEN - 1] = '\0';
- break;
- case USB_FUNCTION_GROUP_WITH_SERVICE:
- type = USBG_F_FFS;
- ret = snprintf(instance, sizeof(instance), "%s%c%s",
- usb_func->name, NAME_INSTANCE_SEP,
- usb_func->instance);
- if (ret < 0 || ret >= sizeof(instance))
- return -ENAMETOOLONG;
- break;
- default:
- return -EINVAL;
- }
-
-
- func = usbg_get_function(cfs_client->gadget, type, instance);
- if (!func) {
- ret = usbg_create_function(cfs_client->gadget,
- type,
- instance,
- NULL, &func);
- if (ret)
- return ret;
-
- if (usb_func->function_group ==
- USB_FUNCTION_GROUP_WITH_SERVICE) {
- struct usb_function_with_service *fws;
-
- fws = container_of(usb_func,
- struct usb_function_with_service,
- func);
- ret = cfs_prep_ffs_service(usb_func->name,
- usb_func->instance,
- instance,
- fws->service);
- if (ret)
- return ret;
- }
-
- }
-
- ret = usbg_add_config_function(config, NULL, func);
- if (ret)
- return ret;
- }
-
- return ret;
-}
-
-static int cfs_cleanup_left_configs(struct cfs_client *cfs_client,
- int last_config)
-{
- usbg_config *lconfig, *config;
- int ret;
-
- lconfig = usbg_get_config(cfs_client->gadget, last_config, NULL);
- for (config = usbg_get_next_config(lconfig);
- config;
- config = usbg_get_next_config(lconfig)) {
- ret = usbg_rm_config(config, USBG_RM_RECURSE);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static int cfs_reconfigure_gadget(struct usb_client *usb,
- struct usb_gadget *gadget)
-{
- struct cfs_client *cfs_client;
- int i;
- int ret;
-
- if (!usb)
- return -EINVAL;
-
- cfs_client = container_of(usb, struct cfs_client,
- client);
-
- if (!usb || !gadget || !cfs_is_gadget_supported(usb, gadget))
- return -EINVAL;
-
- ret = cfs_set_gadget_attrs(cfs_client, &gadget->attrs);
- if (ret)
- goto out;
-
- for (i = 0; gadget->strs && gadget->strs[i].lang_code > 0; ++i) {
- ret = cfs_set_gadget_strs(cfs_client, gadget->strs + i);
- if (ret)
- goto out;
- }
-
- for (i = 0; gadget->configs && gadget->configs[i]; ++i) {
- ret = cfs_set_gadget_config(cfs_client, i + 1,
- gadget->configs[i]);
- if (ret)
- goto out;
- }
-
- ret = cfs_cleanup_left_configs(cfs_client, i);
-
- /* TODO
- * Cleanup things which are left after previous gadget
- */
-out:
- return ret;
-}
-
-static int cfs_enable(struct usb_client *usb)
-{
- struct cfs_client *cfs_client;
-
- if (!usb)
- return -EINVAL;
-
- cfs_client = container_of(usb, struct cfs_client,
- client);
-
- return usbg_enable_gadget(cfs_client->gadget, cfs_client->udc);
-}
-
-static int cfs_disable(struct usb_client *usb)
-{
- struct cfs_client *cfs_client;
-
- if (!usb)
- return -EINVAL;
-
- cfs_client = container_of(usb, struct cfs_client,
- client);
-
- return usbg_disable_gadget(cfs_client->gadget);
-}
-
-static int cfs_gadget_open(struct hw_info *info,
- const char *id, struct hw_common **common)
-{
- struct cfs_client *cfs_client;
- int ret;
-
- if (!info || !common)
- return -EINVAL;
-
- cfs_client = zalloc(sizeof(*cfs_client));
- if (!cfs_client)
- return -ENOMEM;
-
- ret = usbg_init(CONFIGFS_PATH, &cfs_client->ctx);
- if (ret)
- goto err_usbg_init;
-
- cfs_client->udc = usbg_get_first_udc(cfs_client->ctx);
- if (!cfs_client->udc) {
- ret = -ENODEV;
- goto err_no_udc;
- }
-
- ret = usbg_create_gadget(cfs_client->ctx, CONFIGFS_GADGET_NAME,
- &default_g_attrs, &default_g_strs,
- &cfs_client->gadget);
- if (ret)
- goto err_create_gadget;
-
- cfs_client->client.common.info = info;
- cfs_client->client.get_current_gadget = cfs_get_current_gadget;
- cfs_client->client.reconfigure_gadget = cfs_reconfigure_gadget;
- cfs_client->client.is_gadget_supported = cfs_is_gadget_supported;
- cfs_client->client.is_function_supported = cfs_is_function_supported;
- cfs_client->client.enable = cfs_enable;
- cfs_client->client.disable = cfs_disable;
- cfs_client->client.free_gadget = cfs_free_gadget;
-
- *common = &cfs_client->client.common;
- return 0;
-
-err_create_gadget:
-err_no_udc:
- usbg_cleanup(cfs_client->ctx);
-err_usbg_init:
- free(cfs_client);
-
- return ret;
-}
-
-static int cfs_gadget_close(struct hw_common *common)
-{
- struct cfs_client *cfs_client;
-
- if (!common)
- return -EINVAL;
-
- cfs_client = container_of(common, struct cfs_client,
- client.common);
-
- /*
- * For now we don't check for errors
- * but we should somehow handle them
- */
- usbg_rm_gadget(cfs_client->gadget, USBG_RM_RECURSE);
- usbg_cleanup(cfs_client->ctx);
- free(cfs_client);
-
- return 0;
-}
HARDWARE_MODULE_STRUCTURE = {
.magic = HARDWARE_INFO_TAG,
.device_version = USB_CLIENT_HARDWARE_DEVICE_VERSION,
.id = USB_CFS_CLIENT_HARDWARE_DEVICE_ID,
.name = "cfs-gadget",
- .open = cfs_gadget_open,
- .close = cfs_gadget_close,
+ .open = hw_cfs_gadget_open,
+ .close = hw_cfs_gadget_close,
};
*/
#include <hw/usb_client.h>
-#include <hw/systemd.h>
-#include <hw/shared.h>
-
-#include <limits.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-#define zalloc(amount) calloc(1, amount)
-
-#define MAX_GADGET_STR_LEN 256
-#define MAX_FUNCS 32
-
-#define LEGACY_ROOTPATH "/sys/class/usb_mode/usb0"
-
-/* Device descriptor values */
-#define LEGACY_ID_VENDOR_PATH LEGACY_ROOTPATH"/idVendor"
-#define LEGACY_ID_PRODUCT_PATH LEGACY_ROOTPATH"/idProduct"
-#define LEGACY_BCD_DEVICE_PATH LEGACY_ROOTPATH"/bcdDevice"
-#define LEGACY_CLASS_PATH LEGACY_ROOTPATH"/bDeviceClass"
-#define LEGACY_SUBCLASS_PATH LEGACY_ROOTPATH"/bDeviceSubClass"
-#define LEGACY_PROTOCOL_PATH LEGACY_ROOTPATH"/bDeviceProtocol"
-
-/* Strings */
-#define LEGACY_IMANUFACTURER_PATH LEGACY_ROOTPATH"/iManufacturer"
-#define LEGACY_IPRODUCT_PATH LEGACY_ROOTPATH"/iProduct"
-#define LEGACY_ISERIAL_PATH LEGACY_ROOTPATH"/iSerial"
-
-/* Functions in each config */
-#define LEGACY_CONFIG_1_PATH LEGACY_ROOTPATH"/funcs_fconf"
-#define LEGACY_CONFIG_2_PATH LEGACY_ROOTPATH"/funcs_sconf"
-/* should be single char */
-#define LEGACY_FUNC_SEP ","
-
-/* ON/OFF switch */
-#define LEGACY_ENABLE_PATH LEGACY_ROOTPATH"/enable"
-#define LEGACY_ENABLE "1"
-#define LEGACY_DISABLE "0"
-
-#define LEGACY_BMATTRIBUTES ((1 << 7) | (1 << 6))
-#define LEGACY_MAX_POWER 500
-
-/* +5 to be always big enough */
-#define INT_BUF_SIZE (sizeof(int)*8 + 5)
-
-static int get_int_from_file(char *path, int *_val, int base)
-{
- char buf[INT_BUF_SIZE];
- char *endptr;
- long int val;
- int ret;
-
- ret = sys_get_str(path, buf, sizeof(buf));
- if (ret)
- return ret;
-
- val = strtol(buf, &endptr, base);
- if (val == LONG_MIN || val == LONG_MAX ||
- buf[0] == '\0' || (*endptr != '\0' && *endptr != '\n')
- || val > INT_MAX)
- return -EINVAL;
-
- *_val = (int)val;
- return 0;
-}
-
-static int legacy_read_gadget_attrs_strs(struct usb_gadget *gadget)
-{
- int val;
- int ret;
- /* We assume that values received from kernel will be valid */
-#define GET_VALUE_FROM_SYSFS(path, field, type, base) \
- do { \
- ret = get_int_from_file(path, &val, base); \
- if (ret) \
- return ret; \
- \
- gadget->attrs.field = (type)val; \
- } while (0)
-
- GET_VALUE_FROM_SYSFS(LEGACY_CLASS_PATH, bDeviceClass, uint8_t, 0);
- GET_VALUE_FROM_SYSFS(LEGACY_SUBCLASS_PATH, bDeviceSubClass, uint8_t, 0);
- GET_VALUE_FROM_SYSFS(LEGACY_PROTOCOL_PATH, bDeviceProtocol, uint8_t, 0);
- GET_VALUE_FROM_SYSFS(LEGACY_ID_VENDOR_PATH, idVendor, uint16_t, 16);
- GET_VALUE_FROM_SYSFS(LEGACY_ID_PRODUCT_PATH, idProduct, uint16_t, 16);
- GET_VALUE_FROM_SYSFS(LEGACY_BCD_DEVICE_PATH, bcdDevice, uint16_t, 0);
-#undef GET_VALUE_FROM_SYSFS
-
-#define GET_STRING_FROM_SYSFS(path, field) \
- do { \
- char buf[MAX_GADGET_STR_LEN]; \
- \
- ret = sys_get_str(path, buf, sizeof(buf)); \
- if (ret) \
- goto err_##field; \
- \
- gadget->strs[0].field = strdup(buf); \
- if (!gadget->strs[0].field) { \
- ret = -ENOMEM; \
- goto err_##field; \
- } \
- } while (0)
-
- GET_STRING_FROM_SYSFS(LEGACY_IMANUFACTURER_PATH, manufacturer);
- GET_STRING_FROM_SYSFS(LEGACY_IPRODUCT_PATH, product);
- GET_STRING_FROM_SYSFS(LEGACY_ISERIAL_PATH, serial);
-#undef GET_STRING_FROM_SYSFS
-
- return 0;
-
-err_serial:
- free(gadget->strs[0].product);
-err_product:
- free(gadget->strs[0].manufacturer);
-err_manufacturer:
- return ret;
-}
-
-static int legacy_find_func(const char *name)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(_available_funcs); ++i)
- if (!strcmp(name, _available_funcs[i]->name))
- return i;
-
- return -1;
-}
-
-static struct usb_function *legacy_find_func_in_gadget(
- struct usb_gadget *gadget, const char *name)
-{
- int i;
-
- for (i = 0; gadget->funcs[i]; ++i)
- if (!strcmp(name, gadget->funcs[i]->name))
- return gadget->funcs[i];
- return NULL;
-}
-
-static int legacy_alloc_config(int n_funcs, struct usb_configuration **_config)
-{
- struct usb_configuration *config;
-
- config = zalloc(sizeof(*config));
- if (!config)
- goto out;
-
- config->strs = calloc(1, sizeof(*config->strs));
- if (!config->strs)
- goto free_config;
-
- config->funcs = calloc(n_funcs + 1, sizeof(*config->funcs));
- if (!config->funcs)
- goto free_strs;
-
- /*
- * We cannot read correct values
- * so assume that they are always default
- */
- config->attrs.bmAttributs = LEGACY_BMATTRIBUTES;
- config->attrs.MaxPower = LEGACY_MAX_POWER;
-
- *_config = config;
-
- return 0;
-free_strs:
- free(config->strs);
-free_config:
- free(config);
-out:
- return -ENOMEM;
-}
-
-static int legacy_alloc_new_func(struct usb_gadget *gadget, const char *fname,
- struct usb_function **_func)
-{
- struct usb_function *func;
- int ret;
-
- ret = legacy_find_func(fname);
- if (ret < 0)
- return -ENOTSUP;
-
- ret = _available_funcs[ret]->clone(_available_funcs[ret], &func);
- if (ret)
- return ret;
-
- *_func = func;
- return 0;
-}
-
-static int legacy_read_config(struct usb_gadget *gadget,
- char *cpath,
- struct usb_configuration **_config)
-{
- struct usb_configuration *config;
- char buf[MAX_GADGET_STR_LEN];
- char *begin = buf;
- char *fname;
- char *sep = LEGACY_FUNC_SEP;
- int i, f_cnt;
- int f_idx;
- int g_f_idx;
- int ret;
-
- ret = sys_get_str(cpath, buf, sizeof(buf));
- if (ret)
- return ret;
-
- /* Empty */
- if (buf[0] == '\0' || buf[0] == '\n')
- return 0;
-
- /* count number of functions in this config */
- f_cnt = 1;
- for (i = 0; buf[i] != '\0'; ++i) {
- if (buf[i] == sep[0])
- ++f_cnt;
- if (buf[i] == '\n') /* buf ends with it */
- buf[i] = 0;
- }
-
- ret = legacy_alloc_config(f_cnt, &config);
- if (ret)
- return ret;
-
- for (g_f_idx = 0; gadget->funcs[g_f_idx]; ++g_f_idx);
-
- f_idx = 0;
- for (fname = strsep(&begin, sep); fname; fname = strsep(&begin, sep)) {
- struct usb_function *func;
-
- func = legacy_find_func_in_gadget(gadget, fname);
- if (!func) {
- /* new function not added yet to gadget */
- ret = legacy_alloc_new_func(gadget, fname, &func);
- if (ret)
- goto free_config;
-
- gadget->funcs[g_f_idx++] = func;
- }
-
- config->funcs[f_idx++] = func;
- }
-
- *_config = config;
- return 0;
-free_config:
- free(config->strs);
- free(config->funcs);
- free(config);
- return ret;
-}
-
-static int legacy_get_current_gadget(struct usb_client *usb,
- struct usb_gadget **_gadget)
-{
- struct usb_gadget *gadget;
- struct usb_gadget_strings *strs;
- struct usb_configuration **configs;
- struct usb_function **funcs;
- int i;
- int ret = -ENOMEM;
-
- gadget = zalloc(sizeof(*gadget));
- if (!gadget)
- goto out;
-
- strs = calloc(2, sizeof(*strs));
- if (!strs)
- goto free_gadget;
-
- strs[0].lang_code = 0x409;
-
- gadget->strs = strs;
-
- ret = legacy_read_gadget_attrs_strs(gadget);
- if (ret)
- goto free_strs;
-
- /* There will be no more functions than bits in int */
- funcs = calloc(MAX_FUNCS, sizeof(*funcs));
- if (!funcs)
- goto free_strs_with_content;
-
- gadget->funcs = funcs;
-
- /* slp-gadget use max 2 confiuration and NULL termination */
- configs = calloc(3, sizeof(*configs));
- if (!configs)
- goto free_funcs;
-
- gadget->configs = configs;
-
- ret = legacy_read_config(gadget, LEGACY_CONFIG_1_PATH, configs + 0);
- if (ret)
- goto free_configs;
-
- ret = legacy_read_config(gadget, LEGACY_CONFIG_2_PATH, configs + 1);
- if (ret)
- goto free_config_1;
-
- *_gadget = gadget;
- return 0;
-
-free_config_1:
- free(configs[0]->funcs);
- free(configs[0]->strs);
- free(configs[0]);
-free_configs:
- free(configs);
- for (i = 0; gadget->funcs[i]; ++i)
- gadget->funcs[i]->free_func(gadget->funcs[i]);
-free_funcs:
- free(funcs);
-free_strs_with_content:
- free(gadget->strs[0].manufacturer);
- free(gadget->strs[0].product);
- free(gadget->strs[0].serial);
-free_strs:
- free(gadget->strs);
-free_gadget:
- free(gadget);
-out:
- return ret;
-}
-
-static bool legacy_is_function_supported(struct usb_client *usb,
- struct usb_function *func)
-{
- int ret;
-
- /*
- * TODO
- * Instead of only checking whether we know this function
- * we should also parse sysfs to check if it is build into
- * slp-gadget.
- */
- ret = legacy_find_func(func->name);
-
- return ret >= 0;
-}
-
-static bool legacy_is_gadget_supported(struct usb_client *usb,
- struct usb_gadget *gadget)
-{
- int i, j;
-
- if (!gadget || !gadget->configs || !gadget->funcs)
- return false;
-
- /*
- * TODO
- * Here is a good place to ensure that serial is immutable
- */
- if (gadget->strs) {
- /* only strings in US_en are allowed */
- if (gadget->strs[0].lang_code != 0x409 ||
- gadget->strs[1].lang_code)
- return false;
- }
-
- for (j = 0; gadget->configs[j]; ++j) {
- struct usb_configuration *config = gadget->configs[j];
-
- if (config->strs && config->strs[0].lang_code)
- return false;
-
- if (!config->funcs)
- return false;
-
- for (i = 0; config->funcs[i]; ++i)
- if (!legacy_is_function_supported(usb, config->funcs[i]))
- return false;
- }
-
- if (j == 0 || j > 2)
- return false;
-
- return true;
-}
-
-/* TODO. Maybe move this to sys ? */
-static int legacy_set_int_hex(char *path, int val)
-{
- char buf[MAX_GADGET_STR_LEN];
- int r;
-
- if (!path)
- return -EINVAL;
-
- snprintf(buf, sizeof(buf), "%x", val);
- r = sys_set_str(path, buf);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int legacy_set_gadget_attrs(struct usb_gadget_attrs *attrs)
-{
- int ret;
-
- ret = sys_set_int(LEGACY_CLASS_PATH, attrs->bDeviceClass);
- if (ret)
- return ret;
-
- ret = sys_set_int(LEGACY_SUBCLASS_PATH, attrs->bDeviceSubClass);
- if (ret)
- return ret;
-
- ret = sys_set_int(LEGACY_PROTOCOL_PATH, attrs->bDeviceProtocol);
- if (ret)
- return ret;
-
- ret = legacy_set_int_hex(LEGACY_ID_VENDOR_PATH, attrs->idVendor);
- if (ret)
- return ret;
-
- ret = legacy_set_int_hex(LEGACY_ID_PRODUCT_PATH, attrs->idProduct);
- if (ret)
- return ret;
-
- ret = legacy_set_int_hex(LEGACY_BCD_DEVICE_PATH, attrs->bcdDevice);
-
- return ret;
-}
-
-static int legacy_set_gadget_strs(struct usb_gadget_strings *strs)
-{
- int ret = 0;
-
- /*
- * TODO
- * Here is a good place to ensure that serial is immutable
- */
-
- if (strs->manufacturer) {
- ret = sys_set_str(LEGACY_IMANUFACTURER_PATH,
- strs->manufacturer);
- if (ret)
- return ret;
- }
-
- if (strs->product) {
- ret = sys_set_str(LEGACY_IPRODUCT_PATH,
- strs->product);
- if (ret)
- return ret;
- }
-
- return ret;
-}
-
-static int legacy_set_gadget_config(char *cpath,
- struct usb_configuration *config)
-{
- char buf[MAX_GADGET_STR_LEN];
- int left = sizeof(buf);
- char *pos = buf;
- int ret;
- int i;
-
- if (!config) {
- buf[0] = '\n';
- buf[1] = '\0';
- goto empty_config;
- }
-
- for (i = 0; config->funcs[i]; ++i) {
- ret = snprintf(pos, left, "%s" LEGACY_FUNC_SEP,
- config->funcs[i]->name);
- if (ret >= left)
- return -EOVERFLOW;
-
- pos += ret;
- left -= ret;
- }
-
- /* eliminate last separator */
- *(pos - 1) = '\0';
-
-empty_config:
- return sys_set_str(cpath, buf);
-}
-
-static int legacy_reconfigure_gadget(struct usb_client *usb,
- struct usb_gadget *gadget)
-{
- int ret;
-
- if (!usb || !gadget || !legacy_is_gadget_supported(usb, gadget))
- return -EINVAL;
-
- ret = legacy_set_gadget_attrs(&gadget->attrs);
- if (ret)
- return ret;
-
- if (gadget->strs) {
- ret = legacy_set_gadget_strs(gadget->strs + 0);
- if (ret)
- return ret;
- }
-
- ret = legacy_set_gadget_config(LEGACY_CONFIG_1_PATH, gadget->configs[0]);
- if (ret)
- return ret;
-
- ret = legacy_set_gadget_config(LEGACY_CONFIG_2_PATH, gadget->configs[1]);
-
- return ret;
-}
-
-static int legacy_enable(struct usb_client *usb)
-{
- int ret;
- int i;
- struct usb_gadget *gadget;
- struct usb_function_with_service *fws;
-
- ret = sys_set_str(LEGACY_ENABLE_PATH,
- LEGACY_ENABLE);
- if (ret < 0)
- return ret;
-
- ret = legacy_get_current_gadget(usb, &gadget);
- if (ret < 0)
- goto disable_gadget;
-
- for (i = 0; gadget->funcs[i]; ++i) {
- if (gadget->funcs[i]->function_group !=
- USB_FUNCTION_GROUP_WITH_SERVICE)
- continue;
-
- fws = container_of(gadget->funcs[i],
- struct usb_function_with_service, func);
- ret = systemd_start_service(fws->service);
- if (ret < 0)
- goto stop_services;
- }
-
- return 0;
-stop_services:
- while (--i >= 0) {
- if (gadget->funcs[i]->function_group !=
- USB_FUNCTION_GROUP_WITH_SERVICE)
- continue;
-
- fws = container_of(gadget->funcs[i],
- struct usb_function_with_service, func);
- systemd_stop_service(fws->service);
- }
-
-disable_gadget:
- sys_set_str(LEGACY_ENABLE_PATH, LEGACY_DISABLE);
- return ret;
-}
-
-static int legacy_disable(struct usb_client *usb)
-{
- int ret;
- int i;
- struct usb_gadget *gadget;
- struct usb_function_with_service *fws;
-
- ret = legacy_get_current_gadget(usb, &gadget);
- if (ret < 0)
- return ret;
-
- for (i = 0; gadget->funcs[i]; ++i) {
- if (gadget->funcs[i]->function_group != USB_FUNCTION_GROUP_WITH_SERVICE)
- continue;
-
- fws = container_of(gadget->funcs[i], struct usb_function_with_service, func);
- ret = systemd_stop_service(fws->service);
- if (ret < 0)
- return ret;
- }
-
- return sys_set_str(LEGACY_ENABLE_PATH, LEGACY_DISABLE);
-}
-
-static void legacy_free_config(struct usb_configuration *config)
-{
- int i;
-
- if (!config)
- return;
-
- if (config->strs) {
- for (i = 0; config->strs[i].lang_code; ++i)
- free(config->strs[i].config_str);
-
- free(config->strs);
- }
-
- /*
- * Each function will be free later,
- * for now we cleanup only pointers.
- */
- if (config->funcs)
- free(config->funcs);
-
- free(config);
-}
-
-static void legacy_free_gadget(struct usb_gadget *gadget)
-{
- int i;
-
- if (!gadget)
- return;
-
- if (gadget->strs) {
- for (i = 0; gadget->strs[i].lang_code; ++i) {
- free(gadget->strs[i].manufacturer);
- free(gadget->strs[i].product);
- free(gadget->strs[i].serial);
- }
- free(gadget->strs);
- }
-
- if (gadget->configs) {
- for (i = 0; gadget->configs[i]; ++i)
- legacy_free_config(gadget->configs[i]);
-
- free(gadget->configs);
- }
-
- if (gadget->funcs) {
- for (i = 0; gadget->funcs[i]; ++i)
- gadget->funcs[i]->free_func(gadget->funcs[i]);
-
- free(gadget->funcs);
- }
-}
-
-static int legacy_gadget_open(struct hw_info *info,
- const char *id, struct hw_common **common)
-{
- struct usb_client *legacy;
-
- if (!info || !common)
- return -EINVAL;
-
- /* check if slp usb gadget exists */
- if (access("/sys/class/usb_mode/usb0/enable", F_OK))
- return -ENOENT;
-
- legacy = zalloc(sizeof(*legacy));
- if (!legacy)
- return -ENOMEM;
-
- legacy->common.info = info;
- legacy->get_current_gadget = legacy_get_current_gadget;
- legacy->reconfigure_gadget = legacy_reconfigure_gadget;
- legacy->is_gadget_supported = legacy_is_gadget_supported;
- legacy->is_function_supported = legacy_is_function_supported;
- legacy->enable = legacy_enable;
- legacy->disable = legacy_disable;
- legacy->free_gadget = legacy_free_gadget;
-
- *common = &legacy->common;
- return 0;
-}
-
-static int legacy_gadget_close(struct hw_common *common)
-{
- struct usb_client *legacy;
-
- if (!common)
- return -EINVAL;
-
- legacy = container_of(common, struct usb_client,
- common);
-
- free(legacy);
- return 0;
-}
HARDWARE_MODULE_STRUCTURE = {
.magic = HARDWARE_INFO_TAG,
.device_version = USB_CLIENT_HARDWARE_DEVICE_VERSION,
.id = USB_CLIENT_HARDWARE_DEVICE_ID,
.name = "legacy-gadget",
- .open = legacy_gadget_open,
- .close = legacy_gadget_close,
+ .open = hw_legacy_gadget_open,
+ .close = hw_legacy_gadget_close,
};
projects / platform / adaptation / samsung_exynos / device-manager-plugin-odroid.git / commitdiff