diff options
Diffstat (limited to 'drivers/usb/gadget/f_sourcesink.c')
| -rw-r--r-- | drivers/usb/gadget/f_sourcesink.c | 349 |
1 files changed, 327 insertions, 22 deletions
diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c index a8895859a221..d3cd52db78fe 100644 --- a/drivers/usb/gadget/f_sourcesink.c +++ b/drivers/usb/gadget/f_sourcesink.c @@ -21,6 +21,7 @@ #include "g_zero.h" #include "gadget_chips.h" +#include "u_f.h" /* * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral @@ -201,7 +202,7 @@ static struct usb_endpoint_descriptor ss_source_desc = { .wMaxPacketSize = cpu_to_le16(1024), }; -struct usb_ss_ep_comp_descriptor ss_source_comp_desc = { +static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, @@ -218,7 +219,7 @@ static struct usb_endpoint_descriptor ss_sink_desc = { .wMaxPacketSize = cpu_to_le16(1024), }; -struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = { +static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, @@ -236,7 +237,7 @@ static struct usb_endpoint_descriptor ss_iso_source_desc = { .bInterval = 4, }; -struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = { +static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, @@ -254,7 +255,7 @@ static struct usb_endpoint_descriptor ss_iso_sink_desc = { .bInterval = 4, }; -struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = { +static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, @@ -301,23 +302,9 @@ static struct usb_gadget_strings *sourcesink_strings[] = { /*-------------------------------------------------------------------------*/ -struct usb_request *alloc_ep_req(struct usb_ep *ep, int len) +static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len) { - struct usb_request *req; - - req = usb_ep_alloc_request(ep, GFP_ATOMIC); - if (req) { - if (len) - req->length = len; - else - req->length = buflen; - req->buf = kmalloc(req->length, GFP_ATOMIC); - if (!req->buf) { - usb_ep_free_request(ep, req); - req = NULL; - } - } - return req; + return alloc_ep_req(ep, len, buflen); } void free_ep_req(struct usb_ep *ep, struct usb_request *req) @@ -490,6 +477,14 @@ no_iso: static void sourcesink_free_func(struct usb_function *f) { + struct f_ss_opts *opts; + + opts = container_of(f->fi, struct f_ss_opts, func_inst); + + mutex_lock(&opts->lock); + opts->refcnt--; + mutex_unlock(&opts->lock); + usb_free_all_descriptors(f); kfree(func_to_ss(f)); } @@ -628,10 +623,10 @@ static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in, break; } ep = is_in ? ss->iso_in_ep : ss->iso_out_ep; - req = alloc_ep_req(ep, size); + req = ss_alloc_ep_req(ep, size); } else { ep = is_in ? ss->in_ep : ss->out_ep; - req = alloc_ep_req(ep, 0); + req = ss_alloc_ep_req(ep, 0); } if (!req) @@ -878,6 +873,11 @@ static struct usb_function *source_sink_alloc_func( return NULL; ss_opts = container_of(fi, struct f_ss_opts, func_inst); + + mutex_lock(&ss_opts->lock); + ss_opts->refcnt++; + mutex_unlock(&ss_opts->lock); + pattern = ss_opts->pattern; isoc_interval = ss_opts->isoc_interval; isoc_maxpacket = ss_opts->isoc_maxpacket; @@ -898,6 +898,303 @@ static struct usb_function *source_sink_alloc_func( return &ss->function; } +static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item) +{ + return container_of(to_config_group(item), struct f_ss_opts, + func_inst.group); +} + +CONFIGFS_ATTR_STRUCT(f_ss_opts); +CONFIGFS_ATTR_OPS(f_ss_opts); + +static void ss_attr_release(struct config_item *item) +{ + struct f_ss_opts *ss_opts = to_f_ss_opts(item); + + usb_put_function_instance(&ss_opts->func_inst); +} + +static struct configfs_item_operations ss_item_ops = { + .release = ss_attr_release, + .show_attribute = f_ss_opts_attr_show, + .store_attribute = f_ss_opts_attr_store, +}; + +static ssize_t f_ss_opts_pattern_show(struct f_ss_opts *opts, char *page) +{ + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%d", opts->pattern); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_pattern_store(struct f_ss_opts *opts, + const char *page, size_t len) +{ + int ret; + u8 num; + + mutex_lock(&opts->lock); + if (opts->refcnt) { + ret = -EBUSY; + goto end; + } + + ret = kstrtou8(page, 0, &num); + if (ret) + goto end; + + if (num != 0 && num != 1 && num != 2) { + ret = -EINVAL; + goto end; + } + + opts->pattern = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +static struct f_ss_opts_attribute f_ss_opts_pattern = + __CONFIGFS_ATTR(pattern, S_IRUGO | S_IWUSR, + f_ss_opts_pattern_show, + f_ss_opts_pattern_store); + +static ssize_t f_ss_opts_isoc_interval_show(struct f_ss_opts *opts, char *page) +{ + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%d", opts->isoc_interval); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_isoc_interval_store(struct f_ss_opts *opts, + const char *page, size_t len) +{ + int ret; + u8 num; + + mutex_lock(&opts->lock); + if (opts->refcnt) { + ret = -EBUSY; + goto end; + } + + ret = kstrtou8(page, 0, &num); + if (ret) + goto end; + + if (num > 16) { + ret = -EINVAL; + goto end; + } + + opts->isoc_interval = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +static struct f_ss_opts_attribute f_ss_opts_isoc_interval = + __CONFIGFS_ATTR(isoc_interval, S_IRUGO | S_IWUSR, + f_ss_opts_isoc_interval_show, + f_ss_opts_isoc_interval_store); + +static ssize_t f_ss_opts_isoc_maxpacket_show(struct f_ss_opts *opts, char *page) +{ + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%d", opts->isoc_maxpacket); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_isoc_maxpacket_store(struct f_ss_opts *opts, + const char *page, size_t len) +{ + int ret; + u16 num; + + mutex_lock(&opts->lock); + if (opts->refcnt) { + ret = -EBUSY; + goto end; + } + + ret = kstrtou16(page, 0, &num); + if (ret) + goto end; + + if (num > 1024) { + ret = -EINVAL; + goto end; + } + + opts->isoc_maxpacket = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +static struct f_ss_opts_attribute f_ss_opts_isoc_maxpacket = + __CONFIGFS_ATTR(isoc_maxpacket, S_IRUGO | S_IWUSR, + f_ss_opts_isoc_maxpacket_show, + f_ss_opts_isoc_maxpacket_store); + +static ssize_t f_ss_opts_isoc_mult_show(struct f_ss_opts *opts, char *page) +{ + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%d", opts->isoc_mult); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_isoc_mult_store(struct f_ss_opts *opts, + const char *page, size_t len) +{ + int ret; + u8 num; + + mutex_lock(&opts->lock); + if (opts->refcnt) { + ret = -EBUSY; + goto end; + } + + ret = kstrtou8(page, 0, &num); + if (ret) + goto end; + + if (num > 2) { + ret = -EINVAL; + goto end; + } + + opts->isoc_mult = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +static struct f_ss_opts_attribute f_ss_opts_isoc_mult = + __CONFIGFS_ATTR(isoc_mult, S_IRUGO | S_IWUSR, + f_ss_opts_isoc_mult_show, + f_ss_opts_isoc_mult_store); + +static ssize_t f_ss_opts_isoc_maxburst_show(struct f_ss_opts *opts, char *page) +{ + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%d", opts->isoc_maxburst); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_isoc_maxburst_store(struct f_ss_opts *opts, + const char *page, size_t len) +{ + int ret; + u8 num; + + mutex_lock(&opts->lock); + if (opts->refcnt) { + ret = -EBUSY; + goto end; + } + + ret = kstrtou8(page, 0, &num); + if (ret) + goto end; + + if (num > 15) { + ret = -EINVAL; + goto end; + } + + opts->isoc_maxburst = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +static struct f_ss_opts_attribute f_ss_opts_isoc_maxburst = + __CONFIGFS_ATTR(isoc_maxburst, S_IRUGO | S_IWUSR, + f_ss_opts_isoc_maxburst_show, + f_ss_opts_isoc_maxburst_store); + +static ssize_t f_ss_opts_bulk_buflen_show(struct f_ss_opts *opts, char *page) +{ + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%d", opts->bulk_buflen); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_bulk_buflen_store(struct f_ss_opts *opts, + const char *page, size_t len) +{ + int ret; + u32 num; + + mutex_lock(&opts->lock); + if (opts->refcnt) { + ret = -EBUSY; + goto end; + } + + ret = kstrtou32(page, 0, &num); + if (ret) + goto end; + + opts->bulk_buflen = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +static struct f_ss_opts_attribute f_ss_opts_bulk_buflen = + __CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR, + f_ss_opts_bulk_buflen_show, + f_ss_opts_bulk_buflen_store); + +static struct configfs_attribute *ss_attrs[] = { + &f_ss_opts_pattern.attr, + &f_ss_opts_isoc_interval.attr, + &f_ss_opts_isoc_maxpacket.attr, + &f_ss_opts_isoc_mult.attr, + &f_ss_opts_isoc_maxburst.attr, + &f_ss_opts_bulk_buflen.attr, + NULL, +}; + +static struct config_item_type ss_func_type = { + .ct_item_ops = &ss_item_ops, + .ct_attrs = ss_attrs, + .ct_owner = THIS_MODULE, +}; + static void source_sink_free_instance(struct usb_function_instance *fi) { struct f_ss_opts *ss_opts; @@ -913,7 +1210,15 @@ static struct usb_function_instance *source_sink_alloc_inst(void) ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL); if (!ss_opts) return ERR_PTR(-ENOMEM); + mutex_init(&ss_opts->lock); ss_opts->func_inst.free_func_inst = source_sink_free_instance; + ss_opts->isoc_interval = GZERO_ISOC_INTERVAL; + ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET; + ss_opts->bulk_buflen = GZERO_BULK_BUFLEN; + + config_group_init_type_name(&ss_opts->func_inst.group, "", + &ss_func_type); + return &ss_opts->func_inst; } DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst, |