diff options
Diffstat (limited to 'drivers/usb/gadget')
34 files changed, 2615 insertions, 225 deletions
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig index 33834aa09ed4..be5aab9c13f2 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -127,6 +127,12 @@ config USB_GADGET_STORAGE_NUM_BUFFERS a module parameter as well. If unsure, say 2. +config U_SERIAL_CONSOLE + bool "Serial gadget console support" + depends on USB_G_SERIAL + help + It supports the serial gadget can be used as a console. + source "drivers/usb/gadget/udc/Kconfig" # diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 163d305e1200..590c44989e5e 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -56,7 +56,6 @@ struct gadget_info { struct list_head string_list; struct list_head available_func; - const char *udc_name; struct usb_composite_driver composite; struct usb_composite_dev cdev; bool use_os_desc; @@ -233,21 +232,23 @@ static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item, static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page) { - return sprintf(page, "%s\n", to_gadget_info(item)->udc_name ?: ""); + char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; + + return sprintf(page, "%s\n", udc_name ?: ""); } static int unregister_gadget(struct gadget_info *gi) { int ret; - if (!gi->udc_name) + if (!gi->composite.gadget_driver.udc_name) return -ENODEV; ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); if (ret) return ret; - kfree(gi->udc_name); - gi->udc_name = NULL; + kfree(gi->composite.gadget_driver.udc_name); + gi->composite.gadget_driver.udc_name = NULL; return 0; } @@ -271,14 +272,16 @@ static ssize_t gadget_dev_desc_UDC_store(struct config_item *item, if (ret) goto err; } else { - if (gi->udc_name) { + if (gi->composite.gadget_driver.udc_name) { ret = -EBUSY; goto err; } - ret = usb_udc_attach_driver(name, &gi->composite.gadget_driver); - if (ret) + gi->composite.gadget_driver.udc_name = name; + ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); + if (ret) { + gi->composite.gadget_driver.udc_name = NULL; goto err; - gi->udc_name = name; + } } mutex_unlock(&gi->lock); return len; @@ -427,9 +430,9 @@ static int config_usb_cfg_unlink( * remove the function. */ mutex_lock(&gi->lock); - if (gi->udc_name) + if (gi->composite.gadget_driver.udc_name) unregister_gadget(gi); - WARN_ON(gi->udc_name); + WARN_ON(gi->composite.gadget_driver.udc_name); list_for_each_entry(f, &cfg->func_list, list) { if (f->fi == fi) { @@ -873,10 +876,10 @@ static int os_desc_unlink(struct config_item *os_desc_ci, struct usb_composite_dev *cdev = &gi->cdev; mutex_lock(&gi->lock); - if (gi->udc_name) + if (gi->composite.gadget_driver.udc_name) unregister_gadget(gi); cdev->os_desc_config = NULL; - WARN_ON(gi->udc_name); + WARN_ON(gi->composite.gadget_driver.udc_name); mutex_unlock(&gi->lock); return 0; } diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index 898a570319f1..fb1fe96d3215 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -23,6 +23,7 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/device.h> +#include <linux/kfifo.h> #include <sound/core.h> #include <sound/initval.h> @@ -75,6 +76,7 @@ struct f_midi { struct usb_ep *in_ep, *out_ep; struct snd_card *card; struct snd_rawmidi *rmidi; + u8 ms_id; struct snd_rawmidi_substream *in_substream[MAX_PORTS]; struct snd_rawmidi_substream *out_substream[MAX_PORTS]; @@ -87,6 +89,9 @@ struct f_midi { int index; char *id; unsigned int buflen, qlen; + /* This fifo is used as a buffer ring for pre-allocated IN usb_requests */ + DECLARE_KFIFO_PTR(in_req_fifo, struct usb_request *); + unsigned int in_last_port; }; static inline struct f_midi *func_to_midi(struct usb_function *f) @@ -94,7 +99,7 @@ static inline struct f_midi *func_to_midi(struct usb_function *f) return container_of(f, struct f_midi, func); } -static void f_midi_transmit(struct f_midi *midi, struct usb_request *req); +static void f_midi_transmit(struct f_midi *midi); DECLARE_UAC_AC_HEADER_DESCRIPTOR(1); DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(1); @@ -201,12 +206,6 @@ static inline struct usb_request *midi_alloc_ep_req(struct usb_ep *ep, return alloc_ep_req(ep, length, length); } -static void free_ep_req(struct usb_ep *ep, struct usb_request *req) -{ - kfree(req->buf); - usb_ep_free_request(ep, req); -} - static const uint8_t f_midi_cin_length[] = { 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1 }; @@ -258,7 +257,8 @@ f_midi_complete(struct usb_ep *ep, struct usb_request *req) } else if (ep == midi->in_ep) { /* Our transmit completed. See if there's more to go. * f_midi_transmit eats req, don't queue it again. */ - f_midi_transmit(midi, req); + req->length = 0; + f_midi_transmit(midi); return; } break; @@ -269,10 +269,12 @@ f_midi_complete(struct usb_ep *ep, struct usb_request *req) case -ESHUTDOWN: /* disconnect from host */ VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status, req->actual, req->length); - if (ep == midi->out_ep) + if (ep == midi->out_ep) { f_midi_handle_out_data(ep, req); - - free_ep_req(ep, req); + /* We don't need to free IN requests because it's handled + * by the midi->in_req_fifo. */ + free_ep_req(ep, req); + } return; case -EOVERFLOW: /* buffer overrun on read means that @@ -324,12 +326,11 @@ static int f_midi_start_ep(struct f_midi *midi, static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt) { struct f_midi *midi = func_to_midi(f); - struct usb_composite_dev *cdev = f->config->cdev; unsigned i; int err; - /* For Control Device interface we do nothing */ - if (intf == 0) + /* we only set alt for MIDIStreaming interface */ + if (intf != midi->ms_id) return 0; err = f_midi_start_ep(midi, f, midi->in_ep); @@ -340,23 +341,19 @@ static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt) if (err) return err; - usb_ep_disable(midi->out_ep); + /* pre-allocate write usb requests to use on f_midi_transmit. */ + while (kfifo_avail(&midi->in_req_fifo)) { + struct usb_request *req = + midi_alloc_ep_req(midi->in_ep, midi->buflen); - err = config_ep_by_speed(midi->gadget, f, midi->out_ep); - if (err) { - ERROR(cdev, "can't configure %s: %d\n", - midi->out_ep->name, err); - return err; - } + if (req == NULL) + return -ENOMEM; - err = usb_ep_enable(midi->out_ep); - if (err) { - ERROR(cdev, "can't start %s: %d\n", - midi->out_ep->name, err); - return err; - } + req->length = 0; + req->complete = f_midi_complete; - midi->out_ep->driver_data = midi; + kfifo_put(&midi->in_req_fifo, req); + } /* allocate a bunch of read buffers and queue them all at once. */ for (i = 0; i < midi->qlen && err == 0; i++) { @@ -368,9 +365,10 @@ static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt) req->complete = f_midi_complete; err = usb_ep_queue(midi->out_ep, req, GFP_ATOMIC); if (err) { - ERROR(midi, "%s queue req: %d\n", + ERROR(midi, "%s: couldn't enqueue request: %d\n", midi->out_ep->name, err); free_ep_req(midi->out_ep, req); + return err; } } @@ -381,6 +379,7 @@ static void f_midi_disable(struct usb_function *f) { struct f_midi *midi = func_to_midi(f); struct usb_composite_dev *cdev = f->config->cdev; + struct usb_request *req = NULL; DBG(cdev, "disable\n"); @@ -390,6 +389,10 @@ static void f_midi_disable(struct usb_function *f) */ usb_ep_disable(midi->in_ep); usb_ep_disable(midi->out_ep); + + /* release IN requests */ + while (kfifo_get(&midi->in_req_fifo, &req)) + free_ep_req(midi->in_ep, req); } static int f_midi_snd_free(struct snd_device *device) @@ -511,57 +514,113 @@ static void f_midi_transmit_byte(struct usb_request *req, } } -static void f_midi_transmit(struct f_midi *midi, struct usb_request *req) +static void f_midi_drop_out_substreams(struct f_midi *midi) { - struct usb_ep *ep = midi->in_ep; - int i; - - if (!ep) - return; - - if (!req) - req = midi_alloc_ep_req(ep, midi->buflen); - - if (!req) { - ERROR(midi, "%s: alloc_ep_request failed\n", __func__); - return; - } - req->length = 0; - req->complete = f_midi_complete; + unsigned int i; for (i = 0; i < MAX_PORTS; i++) { struct gmidi_in_port *port = midi->in_port[i]; struct snd_rawmidi_substream *substream = midi->in_substream[i]; - if (!port || !port->active || !substream) + if (!port) + break; + + if (!port->active || !substream) continue; - while (req->length + 3 < midi->buflen) { - uint8_t b; - if (snd_rawmidi_transmit(substream, &b, 1) != 1) { - port->active = 0; + snd_rawmidi_drop_output(substream); + } +} + +static void f_midi_transmit(struct f_midi *midi) +{ + struct usb_ep *ep = midi->in_ep; + bool active; + + /* We only care about USB requests if IN endpoint is enabled */ + if (!ep || !ep->enabled) + goto drop_out; + + do { + struct usb_request *req = NULL; + unsigned int len, i; + + active = false; + + /* We peek the request in order to reuse it if it fails + * to enqueue on its endpoint */ + len = kfifo_peek(&midi->in_req_fifo, &req); + if (len != 1) { + ERROR(midi, "%s: Couldn't get usb request\n", __func__); + goto drop_out; + } + + /* If buffer overrun, then we ignore this transmission. + * IMPORTANT: This will cause the user-space rawmidi device to block until a) usb + * requests have been completed or b) snd_rawmidi_write() times out. */ + if (req->length > 0) + return; + + for (i = midi->in_last_port; i < MAX_PORTS; i++) { + struct gmidi_in_port *port = midi->in_port[i]; + struct snd_rawmidi_substream *substream = midi->in_substream[i]; + + if (!port) { + /* Reset counter when we reach the last available port */ + midi->in_last_port = 0; + break; + } + + if (!port->active || !substream) + continue; + + while (req->length + 3 < midi->buflen) { + uint8_t b; + + if (snd_rawmidi_transmit(substream, &b, 1) != 1) { + port->active = 0; + break; + } + f_midi_transmit_byte(req, port, b); + } + + active = !!port->active; + /* Check if last port is still active, which means that + * there is still data on that substream but this current + * request run out of space. */ + if (active) { + midi->in_last_port = i; + /* There is no need to re-iterate though midi ports. */ break; } - f_midi_transmit_byte(req, port, b); } - } - if (req->length > 0 && ep->enabled) { - int err; + if (req->length > 0) { + int err; - err = usb_ep_queue(ep, req, GFP_ATOMIC); - if (err < 0) - ERROR(midi, "%s queue req: %d\n", - midi->in_ep->name, err); - } else { - free_ep_req(ep, req); - } + err = usb_ep_queue(ep, req, GFP_ATOMIC); + if (err < 0) { + ERROR(midi, "%s failed to queue req: %d\n", + midi->in_ep->name, err); + req->length = 0; /* Re-use request next time. */ + } else { + /* Upon success, put request at the back of the queue. */ + kfifo_skip(&midi->in_req_fifo); + kfifo_put(&midi->in_req_fifo, req); + } + } + } while (active); + + return; + +drop_out: + f_midi_drop_out_substreams(midi); } static void f_midi_in_tasklet(unsigned long data) { struct f_midi *midi = (struct f_midi *) data; - f_midi_transmit(midi, NULL); + f_midi_transmit(midi); } static int f_midi_in_open(struct snd_rawmidi_substream *substream) @@ -687,6 +746,7 @@ static int f_midi_register_card(struct f_midi *midi) goto fail; } midi->rmidi = rmidi; + midi->in_last_port = 0; strcpy(rmidi->name, card->shortname); rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | @@ -755,6 +815,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f) goto fail; ms_interface_desc.bInterfaceNumber = status; ac_header_desc.baInterfaceNr[0] = status; + midi->ms_id = status; status = -ENODEV; @@ -1075,6 +1136,7 @@ static void f_midi_free(struct usb_function *f) mutex_lock(&opts->lock); for (i = opts->in_ports - 1; i >= 0; --i) kfree(midi->in_port[i]); + kfifo_free(&midi->in_req_fifo); kfree(midi); --opts->refcnt; mutex_unlock(&opts->lock); @@ -1148,6 +1210,12 @@ static struct usb_function *f_midi_alloc(struct usb_function_instance *fi) midi->index = opts->index; midi->buflen = opts->buflen; midi->qlen = opts->qlen; + midi->in_last_port = 0; + + status = kfifo_alloc(&midi->in_req_fifo, midi->qlen, GFP_KERNEL); + if (status) + goto setup_fail; + ++opts->refcnt; mutex_unlock(&opts->lock); diff --git a/drivers/usb/gadget/function/f_sourcesink.c b/drivers/usb/gadget/function/f_sourcesink.c index 9f3ced62d916..242ba5caffe5 100644 --- a/drivers/usb/gadget/function/f_sourcesink.c +++ b/drivers/usb/gadget/function/f_sourcesink.c @@ -34,13 +34,6 @@ * plus two that support control-OUT tests. If the optional "autoresume" * mode is enabled, it provides good functional coverage for the "USBCV" * test harness from USB-IF. - * - * Note that because this doesn't queue more than one request at a time, - * some other function must be used to test queueing logic. The network - * link (g_ether) is the best overall option for that, since its TX and RX - * queues are relatively independent, will receive a range of packet sizes, - * and can often be made to run out completely. Those issues are important - * when stress testing peripheral controller drivers. */ struct f_sourcesink { struct usb_function function; @@ -57,6 +50,8 @@ struct f_sourcesink { unsigned isoc_mult; unsigned isoc_maxburst; unsigned buflen; + unsigned bulk_qlen; + unsigned iso_qlen; }; static inline struct f_sourcesink *func_to_ss(struct usb_function *f) @@ -303,12 +298,6 @@ static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len) return alloc_ep_req(ep, len, ss->buflen); } -void free_ep_req(struct usb_ep *ep, struct usb_request *req) -{ - kfree(req->buf); - usb_ep_free_request(ep, req); -} - static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep) { int value; @@ -595,31 +584,33 @@ static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in, { struct usb_ep *ep; struct usb_request *req; - int i, size, status; - - for (i = 0; i < 8; i++) { - if (is_iso) { - switch (speed) { - case USB_SPEED_SUPER: - size = ss->isoc_maxpacket * - (ss->isoc_mult + 1) * - (ss->isoc_maxburst + 1); - break; - case USB_SPEED_HIGH: - size = ss->isoc_maxpacket * (ss->isoc_mult + 1); - break; - default: - size = ss->isoc_maxpacket > 1023 ? - 1023 : ss->isoc_maxpacket; - break; - } - ep = is_in ? ss->iso_in_ep : ss->iso_out_ep; - req = ss_alloc_ep_req(ep, size); - } else { - ep = is_in ? ss->in_ep : ss->out_ep; - req = ss_alloc_ep_req(ep, 0); + int i, size, qlen, status = 0; + + if (is_iso) { + switch (speed) { + case USB_SPEED_SUPER: + size = ss->isoc_maxpacket * + (ss->isoc_mult + 1) * + (ss->isoc_maxburst + 1); + break; + case USB_SPEED_HIGH: + size = ss->isoc_maxpacket * (ss->isoc_mult + 1); + break; + default: + size = ss->isoc_maxpacket > 1023 ? + 1023 : ss->isoc_maxpacket; + break; } + ep = is_in ? ss->iso_in_ep : ss->iso_out_ep; + qlen = ss->iso_qlen; + } else { + ep = is_in ? ss->in_ep : ss->out_ep; + qlen = ss->bulk_qlen; + size = 0; + } + for (i = 0; i < qlen; i++) { + req = ss_alloc_ep_req(ep, size); if (!req) return -ENOMEM; @@ -638,10 +629,8 @@ static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in, is_iso ? "ISO-" : "", is_in ? "IN" : "OUT", ep->name, status); free_ep_req(ep, req); + return status; } - - if (!is_iso) - break; } return status; @@ -869,6 +858,8 @@ static struct usb_function *source_sink_alloc_func( ss->isoc_mult = ss_opts->isoc_mult; ss->isoc_maxburst = ss_opts->isoc_maxburst; ss->buflen = ss_opts->bulk_buflen; + ss->bulk_qlen = ss_opts->bulk_qlen; + ss->iso_qlen = ss_opts->iso_qlen; ss->function.name = "source/sink"; ss->function.bind = sourcesink_bind; @@ -1153,6 +1144,82 @@ end: CONFIGFS_ATTR(f_ss_opts_, bulk_buflen); +static ssize_t f_ss_opts_bulk_qlen_show(struct config_item *item, char *page) +{ + struct f_ss_opts *opts = to_f_ss_opts(item); + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%u\n", opts->bulk_qlen); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_bulk_qlen_store(struct config_item *item, + const char *page, size_t len) +{ + struct f_ss_opts *opts = to_f_ss_opts(item); + 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_qlen = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +CONFIGFS_ATTR(f_ss_opts_, bulk_qlen); + +static ssize_t f_ss_opts_iso_qlen_show(struct config_item *item, char *page) +{ + struct f_ss_opts *opts = to_f_ss_opts(item); + int result; + + mutex_lock(&opts->lock); + result = sprintf(page, "%u\n", opts->iso_qlen); + mutex_unlock(&opts->lock); + + return result; +} + +static ssize_t f_ss_opts_iso_qlen_store(struct config_item *item, + const char *page, size_t len) +{ + struct f_ss_opts *opts = to_f_ss_opts(item); + 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->iso_qlen = num; + ret = len; +end: + mutex_unlock(&opts->lock); + return ret; +} + +CONFIGFS_ATTR(f_ss_opts_, iso_qlen); + static struct configfs_attribute *ss_attrs[] = { &f_ss_opts_attr_pattern, &f_ss_opts_attr_isoc_interval, @@ -1160,6 +1227,8 @@ static struct configfs_attribute *ss_attrs[] = { &f_ss_opts_attr_isoc_mult, &f_ss_opts_attr_isoc_maxburst, &f_ss_opts_attr_bulk_buflen, + &f_ss_opts_attr_bulk_qlen, + &f_ss_opts_attr_iso_qlen, NULL, }; @@ -1189,6 +1258,8 @@ static struct usb_function_instance *source_sink_alloc_inst(void) ss_opts->isoc_interval = GZERO_ISOC_INTERVAL; ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET; ss_opts->bulk_buflen = GZERO_BULK_BUFLEN; + ss_opts->bulk_qlen = GZERO_SS_BULK_QLEN; + ss_opts->iso_qlen = GZERO_SS_ISO_QLEN; config_group_init_type_name(&ss_opts->func_inst.group, "", &ss_func_type); diff --git a/drivers/usb/gadget/function/g_zero.h b/drivers/usb/gadget/function/g_zero.h index 15f180904f8a..492924d0d599 100644 --- a/drivers/usb/gadget/function/g_zero.h +++ b/drivers/usb/gadget/function/g_zero.h @@ -10,6 +10,8 @@ #define GZERO_QLEN 32 #define GZERO_ISOC_INTERVAL 4 #define GZERO_ISOC_MAXPACKET 1024 +#define GZERO_SS_BULK_QLEN 1 +#define GZERO_SS_ISO_QLEN 8 struct usb_zero_options { unsigned pattern; @@ -19,6 +21,8 @@ struct usb_zero_options { unsigned isoc_maxburst; unsigned bulk_buflen; unsigned qlen; + unsigned ss_bulk_qlen; + unsigned ss_iso_qlen; }; struct f_ss_opts { @@ -29,6 +33,8 @@ struct f_ss_opts { unsigned isoc_mult; unsigned isoc_maxburst; unsigned bulk_buflen; + unsigned bulk_qlen; + unsigned iso_qlen; /* * Read/write access to configfs attributes is handled by configfs. @@ -59,7 +65,6 @@ void lb_modexit(void); int lb_modinit(void); /* common utilities */ -void free_ep_req(struct usb_ep *ep, struct usb_request *req); void disable_endpoints(struct usb_composite_dev *cdev, struct usb_ep *in, struct usb_ep *out, struct usb_ep *iso_in, struct usb_ep *iso_out); diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c index 6554322af2c1..637809e3bd0d 100644 --- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -143,21 +143,11 @@ static inline int qlen(struct usb_gadget *gadget, unsigned qmult) static int ueth_change_mtu(struct net_device *net, int new_mtu) { - struct eth_dev *dev = netdev_priv(net); - unsigned long flags; - int status = 0; + if (new_mtu <= ETH_HLEN || new_mtu > GETHER_MAX_ETH_FRAME_LEN) + return -ERANGE; + net->mtu = new_mtu; - /* don't change MTU on "live" link (peer won't know) */ - spin_lock_irqsave(&dev->lock, flags); - if (dev->port_usb) - status = -EBUSY; - else if (new_mtu <= ETH_HLEN || new_mtu > GETHER_MAX_ETH_FRAME_LEN) - status = -ERANGE; - else - net->mtu = new_mtu; - spin_unlock_irqrestore(&dev->lock, flags); - - return status; + return 0; } static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p) diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c index f7771d86ad6c..6af145f2a99d 100644 --- a/drivers/usb/gadget/function/u_serial.c +++ b/drivers/usb/gadget/function/u_serial.c @@ -27,6 +27,8 @@ #include <linux/slab.h> #include <linux/export.h> #include <linux/module.h> +#include <linux/console.h> +#include <linux/kthread.h> #include "u_serial.h" @@ -79,6 +81,7 @@ */ #define QUEUE_SIZE 16 #define WRITE_BUF_SIZE 8192 /* TX only */ +#define GS_CONSOLE_BUF_SIZE 8192 /* circular buffer */ struct gs_buf { @@ -88,6 +91,17 @@ struct gs_buf { char *buf_put; }; +/* console info */ +struct gscons_info { + struct gs_port *port; + struct task_struct *console_thread; + struct gs_buf con_buf; + /* protect the buf and busy flag */ + spinlock_t con_lock; + int req_busy; + struct usb_request *console_req; +}; + /* * The port structure holds info for each port, one for each minor number * (and thus for each /dev/ node). @@ -1023,6 +1037,246 @@ static const struct tty_operations gs_tty_ops = { static struct tty_driver *gs_tty_driver; +#ifdef CONFIG_U_SERIAL_CONSOLE + +static struct gscons_info gscons_info; +static struct console gserial_cons; + +static struct usb_request *gs_request_new(struct usb_ep *ep) +{ + struct usb_request *req = usb_ep_alloc_request(ep, GFP_ATOMIC); + if (!req) + return NULL; + + req->buf = kmalloc(ep->maxpacket, GFP_ATOMIC); + if (!req->buf) { + usb_ep_free_request(ep, req); + return NULL; + } + + return req; +} + +static void gs_request_free(struct usb_request *req, struct usb_ep *ep) +{ + if (!req) + return; + + kfree(req->buf); + usb_ep_free_request(ep, req); +} + +static void gs_complete_out(struct usb_ep *ep, struct usb_request *req) +{ + struct gscons_info *info = &gscons_info; + + switch (req->status) { + default: + pr_warn("%s: unexpected %s status %d\n", + __func__, ep->name, req->status); + case 0: + /* normal completion */ + spin_lock(&info->con_lock); + info->req_busy = 0; + spin_unlock(&info->con_lock); + + wake_up_process(info->console_thread); + break; + case -ESHUTDOWN: + /* disconnect */ + pr_vdebug("%s: %s shutdown\n", __func__, ep->name); + break; + } +} + +static int gs_console_connect(int port_num) +{ + struct gscons_info *info = &gscons_info; + struct gs_port *port; + struct usb_ep *ep; + + if (port_num != gserial_cons.index) { + pr_err("%s: port num [%d] is not support console\n", + __func__, port_num); + return -ENXIO; + } + + port = ports[port_num].port; + ep = port->port_usb->in; + if (!info->console_req) { + info->console_req = gs_request_new(ep); + if (!info->console_req) + return -ENOMEM; + info->console_req->complete = gs_complete_out; + } + + info->port = port; + spin_lock(&info->con_lock); + info->req_busy = 0; + spin_unlock(&info->con_lock); + pr_vdebug("port[%d] console connect!\n", port_num); + return 0; +} + +static void gs_console_disconnect(struct usb_ep *ep) +{ + struct gscons_info *info = &gscons_info; + struct usb_request *req = info->console_req; + + gs_request_free(req, ep); + info->console_req = NULL; +} + +static int gs_console_thread(void *data) +{ + struct gscons_info *info = &gscons_info; + struct gs_port *port; + struct usb_request *req; + struct usb_ep *ep; + int xfer, ret, count, size; + + do { + port = info->port; + set_current_state(TASK_INTERRUPTIBLE); + if (!port || !port->port_usb + || !port->port_usb->in || !info->console_req) + goto sched; + + req = info->console_req; + ep = port->port_usb->in; + + spin_lock_irq(&info->con_lock); + count = gs_buf_data_avail(&info->con_buf); + size = ep->maxpacket; + + if (count > 0 && !info->req_busy) { + set_current_state(TASK_RUNNING); + if (count < size) + size = count; + + xfer = gs_buf_get(&info->con_buf, req->buf, size); + req->length = xfer; + + spin_unlock(&info->con_lock); + ret = usb_ep_queue(ep, req, GFP_ATOMIC); + spin_lock(&info->con_lock); + if (ret < 0) + info->req_busy = 0; + else + info->req_busy = 1; + + spin_unlock_irq(&info->con_lock); + } else { + spin_unlock_irq(&info->con_lock); +sched: + if (kthread_should_stop()) { + set_current_state(TASK_RUNNING); + break; + } + schedule(); + } + } while (1); + + return 0; +} + +static int gs_console_setup(struct console *co, char *options) +{ + struct gscons_info *info = &gscons_info; + int status; + + info->port = NULL; + info->console_req = NULL; + info->req_busy = 0; + spin_lock_init(&info->con_lock); + + status = gs_buf_alloc(&info->con_buf, GS_CONSOLE_BUF_SIZE); + if (status) { + pr_err("%s: allocate console buffer failed\n", __func__); + return status; + } + + info->console_thread = kthread_create(gs_console_thread, + co, "gs_console"); + if (IS_ERR(info->console_thread)) { + pr_err("%s: cannot create console thread\n", __func__); + gs_buf_free(&info->con_buf); + return PTR_ERR(info->console_thread); + } + wake_up_process(info->console_thread); + + return 0; +} + +static void gs_console_write(struct console *co, + const char *buf, unsigned count) +{ + struct gscons_info *info = &gscons_info; + unsigned long flags; + + spin_lock_irqsave(&info->con_lock, flags); + gs_buf_put(&info->con_buf, buf, count); + spin_unlock_irqrestore(&info->con_lock, flags); + + wake_up_process(info->console_thread); +} + +static struct tty_driver *gs_console_device(struct console *co, int *index) +{ + struct tty_driver **p = (struct tty_driver **)co->data; + + if (!*p) + return NULL; + + *index = co->index; + return *p; +} + +static struct console gserial_cons = { + .name = "ttyGS", + .write = gs_console_write, + .device = gs_console_device, + .setup = gs_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &gs_tty_driver, +}; + +static void gserial_console_init(void) +{ + register_console(&gserial_cons); +} + +static void gserial_console_exit(void) +{ + struct gscons_info *info = &gscons_info; + + unregister_console(&gserial_cons); + kthread_stop(info->console_thread); + gs_buf_free(&info->con_buf); +} + +#else + +static int gs_console_connect(int port_num) +{ + return 0; +} + +static void gs_console_disconnect(struct usb_ep *ep) +{ +} + +static void gserial_console_init(void) +{ +} + +static void gserial_console_exit(void) +{ +} + +#endif + static int gs_port_alloc(unsigned port_num, struct usb_cdc_line_coding *coding) { @@ -1096,6 +1350,7 @@ void gserial_free_line(unsigned char port_num) gserial_free_port(port); tty_unregister_device(gs_tty_driver, port_num); + gserial_console_exit(); } EXPORT_SYMBOL_GPL(gserial_free_line); @@ -1138,6 +1393,7 @@ int gserial_alloc_line(unsigned char *line_num) goto err; } *line_num = port_num; + gserial_console_init(); err: return ret; } @@ -1219,6 +1475,7 @@ int gserial_connect(struct gserial *gser, u8 port_num) gser->disconnect(gser); } + status = gs_console_connect(port_num); spin_unlock_irqrestore(&port->port_lock, flags); return status; @@ -1277,6 +1534,7 @@ void gserial_disconnect(struct gserial *gser) port->read_allocated = port->read_started = port->write_allocated = port->write_started = 0; + gs_console_disconnect(gser->in); spin_unlock_irqrestore(&port->port_lock, flags); } EXPORT_SYMBOL_GPL(gserial_disconnect); diff --git a/drivers/usb/gadget/legacy/acm_ms.c b/drivers/usb/gadget/legacy/acm_ms.c index 4b158e2d1e57..c16089efc322 100644 --- a/drivers/usb/gadget/legacy/acm_ms.c +++ b/drivers/usb/gadget/legacy/acm_ms.c @@ -40,7 +40,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_MISC /* 0xEF */, .bDeviceSubClass = 2, diff --git a/drivers/usb/gadget/legacy/audio.c b/drivers/usb/gadget/legacy/audio.c index 685cf3b4b78f..5d7b3c6a422b 100644 --- a/drivers/usb/gadget/legacy/audio.c +++ b/drivers/usb/gadget/legacy/audio.c @@ -123,7 +123,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x200), + /* .bcdUSB = DYNAMIC */ #ifdef CONFIG_GADGET_UAC1 .bDeviceClass = USB_CLASS_PER_INTERFACE, diff --git a/drivers/usb/gadget/legacy/cdc2.c b/drivers/usb/gadget/legacy/cdc2.c index ecd8c8d62f2e..51c08682de84 100644 --- a/drivers/usb/gadget/legacy/cdc2.c +++ b/drivers/usb/gadget/legacy/cdc2.c @@ -43,7 +43,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_COMM, .bDeviceSubClass = 0, diff --git a/drivers/usb/gadget/legacy/ether.c b/drivers/usb/gadget/legacy/ether.c index 31e9160223e9..25a2c2e48592 100644 --- a/drivers/usb/gadget/legacy/ether.c +++ b/drivers/usb/gadget/legacy/ether.c @@ -151,7 +151,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16 (0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_COMM, .bDeviceSubClass = 0, diff --git a/drivers/usb/gadget/legacy/g_ffs.c b/drivers/usb/gadget/legacy/g_ffs.c index 320a81b2baa6..f85639ef8a8f 100644 --- a/drivers/usb/gadget/legacy/g_ffs.c +++ b/drivers/usb/gadget/legacy/g_ffs.c @@ -69,7 +69,7 @@ static struct usb_device_descriptor gfs_dev_desc = { .bLength = sizeof gfs_dev_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_PER_INTERFACE, .idVendor = cpu_to_le16(GFS_VENDOR_ID), diff --git a/drivers/usb/gadget/legacy/gmidi.c b/drivers/usb/gadget/legacy/gmidi.c index 8a18348ae86e..fc2ac150f5ff 100644 --- a/drivers/usb/gadget/legacy/gmidi.c +++ b/drivers/usb/gadget/legacy/gmidi.c @@ -21,19 +21,12 @@ /* #define VERBOSE_DEBUG */ #include <linux/kernel.h> -#include <linux/slab.h> #include <linux/module.h> -#include <linux/device.h> -#include <sound/core.h> #include <sound/initval.h> -#include <sound/rawmidi.h> -#include <linux/usb/ch9.h> #include <linux/usb/composite.h> #include <linux/usb/gadget.h> -#include <linux/usb/audio.h> -#include <linux/usb/midi.h> #include "u_midi.h" @@ -42,7 +35,6 @@ MODULE_AUTHOR("Ben Williamson"); MODULE_LICENSE("GPL v2"); -static const char shortname[] = "g_midi"; static const char longname[] = "MIDI Gadget"; USB_GADGET_COMPOSITE_OPTIONS(); @@ -61,7 +53,7 @@ MODULE_PARM_DESC(buflen, "MIDI buffer length"); static unsigned int qlen = 32; module_param(qlen, uint, S_IRUGO); -MODULE_PARM_DESC(qlen, "USB read request queue length"); +MODULE_PARM_DESC(qlen, "USB read and write request queue length"); static unsigned int in_ports = 1; module_param(in_ports, uint, S_IRUGO); @@ -86,7 +78,7 @@ MODULE_PARM_DESC(out_ports, "Number of MIDI output ports"); static struct usb_device_descriptor device_desc = { .bLength = USB_DT_DEVICE_SIZE, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_PER_INTERFACE, .idVendor = cpu_to_le16(DRIVER_VENDOR_NUM), .idProduct = cpu_to_le16(DRIVER_PRODUCT_NUM), diff --git a/drivers/usb/gadget/legacy/hid.c b/drivers/usb/gadget/legacy/hid.c index 7e5d2c48476e..a71a884f79fc 100644 --- a/drivers/usb/gadget/legacy/hid.c +++ b/drivers/usb/gadget/legacy/hid.c @@ -47,7 +47,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ /* .bDeviceClass = USB_CLASS_COMM, */ /* .bDeviceSubClass = 0, */ diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c index f454c7af489c..365afd7e14f8 100644 --- a/drivers/usb/gadget/legacy/inode.c +++ b/drivers/usb/gadget/legacy/inode.c @@ -1137,10 +1137,9 @@ ep0_write (struct file *fd, const char __user *buf, size_t len, loff_t *ptr) dev->gadget->ep0, dev->req, GFP_KERNEL); } + spin_lock_irq(&dev->lock); if (retval < 0) { - spin_lock_irq (&dev->lock); clean_req (dev->gadget->ep0, dev->req); - spin_unlock_irq (&dev->lock); } else retval = len; diff --git a/drivers/usb/gadget/legacy/mass_storage.c b/drivers/usb/gadget/legacy/mass_storage.c index bda3c519110f..e61af53c7d2b 100644 --- a/drivers/usb/gadget/legacy/mass_storage.c +++ b/drivers/usb/gadget/legacy/mass_storage.c @@ -55,7 +55,7 @@ static struct usb_device_descriptor msg_device_desc = { .bLength = sizeof msg_device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_PER_INTERFACE, /* Vendor and product id can be overridden by module parameters. */ diff --git a/drivers/usb/gadget/legacy/multi.c b/drivers/usb/gadget/legacy/multi.c index 4fe794ddcd49..229d704a620b 100644 --- a/drivers/usb/gadget/legacy/multi.c +++ b/drivers/usb/gadget/legacy/multi.c @@ -67,7 +67,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_MISC /* 0xEF */, .bDeviceSubClass = 2, diff --git a/drivers/usb/gadget/legacy/ncm.c b/drivers/usb/gadget/legacy/ncm.c index 2bae4381332d..0aba68253e3d 100644 --- a/drivers/usb/gadget/legacy/ncm.c +++ b/drivers/usb/gadget/legacy/ncm.c @@ -49,7 +49,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16 (0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_COMM, .bDeviceSubClass = 0, diff --git a/drivers/usb/gadget/legacy/nokia.c b/drivers/usb/gadget/legacy/nokia.c index 8b3f6fb1825d..09975046c694 100644 --- a/drivers/usb/gadget/legacy/nokia.c +++ b/drivers/usb/gadget/legacy/nokia.c @@ -89,7 +89,7 @@ static struct usb_gadget_strings *dev_strings[] = { static struct usb_device_descriptor device_desc = { .bLength = USB_DT_DEVICE_SIZE, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_COMM, .idVendor = cpu_to_le16(NOKIA_VENDOR_ID), .idProduct = cpu_to_le16(NOKIA_PRODUCT_ID), diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c index a22d30a4def1..6f969a86175c 100644 --- a/drivers/usb/gadget/legacy/printer.c +++ b/drivers/usb/gadget/legacy/printer.c @@ -71,7 +71,7 @@ static struct usb_function *f_printer; static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_PER_INTERFACE, .bDeviceSubClass = 0, .bDeviceProtocol = 0, diff --git a/drivers/usb/gadget/legacy/serial.c b/drivers/usb/gadget/legacy/serial.c index c5d42e0347a9..9d89adce756d 100644 --- a/drivers/usb/gadget/legacy/serial.c +++ b/drivers/usb/gadget/legacy/serial.c @@ -65,7 +65,7 @@ static struct usb_gadget_strings *dev_strings[] = { static struct usb_device_descriptor device_desc = { .bLength = USB_DT_DEVICE_SIZE, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ /* .bDeviceClass = f(use_acm) */ .bDeviceSubClass = 0, .bDeviceProtocol = 0, diff --git a/drivers/usb/gadget/legacy/tcm_usb_gadget.c b/drivers/usb/gadget/legacy/tcm_usb_gadget.c index 22e56158d585..7857fa411636 100644 --- a/drivers/usb/gadget/legacy/tcm_usb_gadget.c +++ b/drivers/usb/gadget/legacy/tcm_usb_gadget.c @@ -1974,7 +1974,7 @@ static struct usb_descriptor_header *uasp_ss_function_desc[] = { static struct usb_device_descriptor usbg_device_desc = { .bLength = sizeof(usbg_device_desc), .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_PER_INTERFACE, .idVendor = cpu_to_le16(UAS_VENDOR_ID), .idProduct = cpu_to_le16(UAS_PRODUCT_ID), diff --git a/drivers/usb/gadget/legacy/webcam.c b/drivers/usb/gadget/legacy/webcam.c index 72c976bf3530..f9661cd627c8 100644 --- a/drivers/usb/gadget/legacy/webcam.c +++ b/drivers/usb/gadget/legacy/webcam.c @@ -77,7 +77,7 @@ static struct usb_function *f_uvc; static struct usb_device_descriptor webcam_device_descriptor = { .bLength = USB_DT_DEVICE_SIZE, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_MISC, .bDeviceSubClass = 0x02, .bDeviceProtocol = 0x01, diff --git a/drivers/usb/gadget/legacy/zero.c b/drivers/usb/gadget/legacy/zero.c index 37a410056fed..d02e2ce73ea5 100644 --- a/drivers/usb/gadget/legacy/zero.c +++ b/drivers/usb/gadget/legacy/zero.c @@ -68,6 +68,8 @@ static struct usb_zero_options gzero_options = { .isoc_maxpacket = GZERO_ISOC_MAXPACKET, .bulk_buflen = GZERO_BULK_BUFLEN, .qlen = GZERO_QLEN, + .ss_bulk_qlen = GZERO_SS_BULK_QLEN, + .ss_iso_qlen = GZERO_SS_ISO_QLEN, }; /*-------------------------------------------------------------------------*/ @@ -113,7 +115,7 @@ static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_VENDOR_SPEC, .idVendor = cpu_to_le16(DRIVER_VENDOR_NUM), @@ -255,6 +257,14 @@ static struct usb_function_instance *func_inst_lb; module_param_named(qlen, gzero_options.qlen, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(qlen, "depth of loopback queue"); +module_param_named(ss_bulk_qlen, gzero_options.ss_bulk_qlen, uint, + S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(bulk_qlen, "depth of sourcesink queue for bulk transfer"); + +module_param_named(ss_iso_qlen, gzero_options.ss_iso_qlen, uint, + S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(iso_qlen, "depth of sourcesink queue for iso transfer"); + static int zero_bind(struct usb_composite_dev *cdev) { struct f_ss_opts *ss_opts; @@ -285,6 +295,8 @@ static int zero_bind(struct usb_composite_dev *cdev) ss_opts->isoc_mult = gzero_options.isoc_mult; ss_opts->isoc_maxburst = gzero_options.isoc_maxburst; ss_opts->bulk_buflen = gzero_options.bulk_buflen; + ss_opts->bulk_qlen = gzero_options.ss_bulk_qlen; + ss_opts->iso_qlen = gzero_options.ss_iso_qlen; func_ss = usb_get_function(func_inst_ss); if (IS_ERR(func_ss)) { diff --git a/drivers/usb/gadget/u_f.c b/drivers/usb/gadget/u_f.c index c6276f0268ae..4bc7eea8bfc8 100644 --- a/drivers/usb/gadget/u_f.c +++ b/drivers/usb/gadget/u_f.c @@ -11,7 +11,6 @@ * published by the Free Software Foundation. */ -#include <linux/usb/gadget.h> #include "u_f.h" struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len) diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h index 1d5f0eb68552..4247cc098a89 100644 --- a/drivers/usb/gadget/u_f.h +++ b/drivers/usb/gadget/u_f.h @@ -16,6 +16,8 @@ #ifndef __U_F_H__ #define __U_F_H__ +#include <linux/usb/gadget.h> + /* Variable Length Array Macros **********************************************/ #define vla_group(groupname) size_t groupname##__next = 0 #define vla_group_size(groupname) groupname##__next @@ -45,8 +47,12 @@ struct usb_ep; struct usb_request; +/* Requests allocated via alloc_ep_req() must be freed by free_ep_req(). */ struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len); +static inline void free_ep_req(struct usb_ep *ep, struct usb_request *req) +{ + kfree(req->buf); + usb_ep_free_request(ep, req); +} #endif /* __U_F_H__ */ - - diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index cdbff54e07ac..753c29bd11ad 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -174,6 +174,17 @@ config USB_RENESAS_USBHS_UDC dynamically linked module called "renesas_usbhs" and force all gadget drivers to also be dynamically linked. +config USB_RENESAS_USB3 + tristate 'Renesas USB3.0 Peripheral controller' + depends on ARCH_SHMOBILE || COMPILE_TEST + help + Renesas USB3.0 Peripheral controller is a USB peripheral controller + that supports super, high, and full speed USB 3.0 data transfers. + + Say "y" to link the driver statically, or "m" to build a + dynamically linked module called "renesas_usb3" and force all + gadget drivers to also be dynamically linked. + config USB_PXA27X tristate "PXA 27x" help diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile index fba2049bf985..dfee53446319 100644 --- a/drivers/usb/gadget/udc/Makefile +++ b/drivers/usb/gadget/udc/Makefile @@ -19,6 +19,7 @@ fsl_usb2_udc-y := fsl_udc_core.o fsl_usb2_udc-$(CONFIG_ARCH_MXC) += fsl_mxc_udc.o obj-$(CONFIG_USB_M66592) += m66592-udc.o obj-$(CONFIG_USB_R8A66597) += r8a66597-udc.o +obj-$(CONFIG_USB_RENESAS_USB3) += renesas_usb3.o obj-$(CONFIG_USB_FSL_QE) += fsl_qe_udc.o obj-$(CONFIG_USB_S3C_HSUDC) += s3c-hsudc.o obj-$(CONFIG_USB_LPC32XX) += lpc32xx_udc.o diff --git a/drivers/usb/gadget/udc/bcm63xx_udc.c b/drivers/usb/gadget/udc/bcm63xx_udc.c index 8cbb00325824..f5fccb3e4152 100644 --- a/drivers/usb/gadget/udc/bcm63xx_udc.c +++ b/drivers/usb/gadget/udc/bcm63xx_udc.c @@ -1083,7 +1083,7 @@ static int bcm63xx_ep_disable(struct usb_ep *ep) struct bcm63xx_ep *bep = our_ep(ep); struct bcm63xx_udc *udc = bep->udc; struct iudma_ch *iudma = bep->iudma; - struct list_head *pos, *n; + struct bcm63xx_req *breq, *n; unsigned long flags; if (!ep || !ep->desc) @@ -1099,10 +1099,7 @@ static int bcm63xx_ep_disable(struct usb_ep *ep) iudma_reset_channel(udc, iudma); if (!list_empty(&bep->queue)) { - list_for_each_safe(pos, n, &bep->queue) { - struct bcm63xx_req *breq = - list_entry(pos, struct bcm63xx_req, queue); - + list_for_each_entry_safe(breq, n, &bep->queue, queue) { usb_gadget_unmap_request(&udc->gadget, &breq->req, iudma->is_tx); list_del(&breq->queue); diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c index b9429bc42511..39b7136d31d9 100644 --- a/drivers/usb/gadget/udc/gr_udc.c +++ b/drivers/usb/gadget/udc/gr_udc.c @@ -253,13 +253,12 @@ static struct gr_dma_desc *gr_alloc_dma_desc(struct gr_ep *ep, gfp_t gfp_flags) dma_addr_t paddr; struct gr_dma_desc *dma_desc; - dma_desc = dma_pool_alloc(ep->dev->desc_pool, gfp_flags, &paddr); + dma_desc = dma_pool_zalloc(ep->dev->desc_pool, gfp_flags, &paddr); if (!dma_desc) { dev_err(ep->dev->dev, "Could not allocate from DMA pool\n"); return NULL; } - memset(dma_desc, 0, sizeof(*dma_desc)); dma_desc->paddr = paddr; return dma_desc; diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c index 00b5006baf15..79fe6b77ee44 100644 --- a/drivers/usb/gadget/udc/lpc32xx_udc.c +++ b/drivers/usb/gadget/udc/lpc32xx_udc.c @@ -28,42 +28,29 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> +#include <linux/clk.h> #include <linux/delay.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/list.h> +#include <linux/dma-mapping.h> +#include <linux/dmapool.h> +#include <linux/i2c.h> #include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> #include <linux/proc_fs.h> -#include <linux/clk.h> +#include <linux/slab.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> -#include <linux/i2c.h> -#include <linux/kthread.h> -#include <linux/freezer.h> -#include <linux/dma-mapping.h> -#include <linux/dmapool.h> -#include <linux/workqueue.h> -#include <linux/of.h> #include <linux/usb/isp1301.h> -#include <asm/byteorder.h> -#include <mach/hardware.h> -#include <linux/io.h> -#include <asm/irq.h> - -#include <mach/platform.h> -#include <mach/irqs.h> -#include <mach/board.h> #ifdef CONFIG_USB_GADGET_DEBUG_FILES #include <linux/debugfs.h> #include <linux/seq_file.h> #endif +#include <mach/hardware.h> +#include <mach/platform.h> + /* * USB device configuration structure */ diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c new file mode 100644 index 000000000000..93a3bec81df7 --- /dev/null +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -0,0 +1,1975 @@ +/* + * Renesas USB3.0 Peripheral driver (USB gadget) + * + * Copyright (C) 2015 Renesas Electronics Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/sizes.h> +#include <linux/slab.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> + +/* register definitions */ +#define USB3_AXI_INT_STA 0x008 +#define USB3_AXI_INT_ENA 0x00c +#define USB3_DMA_INT_STA 0x010 +#define USB3_DMA_INT_ENA 0x014 +#define USB3_USB_COM_CON 0x200 +#define USB3_USB20_CON 0x204 +#define USB3_USB30_CON 0x208 +#define USB3_USB_STA 0x210 +#define USB3_DRD_CON 0x218 +#define USB3_USB_INT_STA_1 0x220 +#define USB3_USB_INT_STA_2 0x224 +#define USB3_USB_INT_ENA_1 0x228 +#define USB3_USB_INT_ENA_2 0x22c +#define USB3_STUP_DAT_0 0x230 +#define USB3_STUP_DAT_1 0x234 +#define USB3_P0_MOD 0x280 +#define USB3_P0_CON 0x288 +#define USB3_P0_STA 0x28c +#define USB3_P0_INT_STA 0x290 +#define USB3_P0_INT_ENA 0x294 +#define USB3_P0_LNG 0x2a0 +#define USB3_P0_READ 0x2a4 +#define USB3_P0_WRITE 0x2a8 +#define USB3_PIPE_COM 0x2b0 +#define USB3_PN_MOD 0x2c0 +#define USB3_PN_RAMMAP 0x2c4 +#define USB3_PN_CON 0x2c8 +#define USB3_PN_STA 0x2cc +#define USB3_PN_INT_STA 0x2d0 +#define USB3_PN_INT_ENA 0x2d4 +#define USB3_PN_LNG 0x2e0 +#define USB3_PN_READ 0x2e4 +#define USB3_PN_WRITE 0x2e8 +#define USB3_SSIFCMD 0x340 + +/* AXI_INT_ENA and AXI_INT_STA */ +#define AXI_INT_DMAINT BIT(31) +#define AXI_INT_EPCINT BIT(30) + +/* LCLKSEL */ +#define LCLKSEL_LSEL BIT(18) + +/* USB_COM_CON */ +#define USB_COM_CON_CONF BIT(24) +#define USB_COM_CON_SPD_MODE BIT(17) +#define USB_COM_CON_EP0_EN BIT(16) +#define USB_COM_CON_DEV_ADDR_SHIFT 8 +#define USB_COM_CON_DEV_ADDR_MASK GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT) +#define USB_COM_CON_DEV_ADDR(n) (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \ + USB_COM_CON_DEV_ADDR_MASK) +#define USB_COM_CON_RX_DETECTION BIT(1) +#define USB_COM_CON_PIPE_CLR BIT(0) + +/* USB20_CON */ +#define USB20_CON_B2_PUE BIT(31) +#define USB20_CON_B2_SUSPEND BIT(24) +#define USB20_CON_B2_CONNECT BIT(17) +#define USB20_CON_B2_TSTMOD_SHIFT 8 +#define USB20_CON_B2_TSTMOD_MASK GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT) +#define USB20_CON_B2_TSTMOD(n) (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \ + USB20_CON_B2_TSTMOD_MASK) +#define USB20_CON_B2_TSTMOD_EN BIT(0) + +/* USB30_CON */ +#define USB30_CON_POW_SEL_SHIFT 24 +#define USB30_CON_POW_SEL_MASK GENMASK(26, USB30_CON_POW_SEL_SHIFT) +#define USB30_CON_POW_SEL_IN_U3 BIT(26) +#define USB30_CON_POW_SEL_IN_DISCON 0 +#define USB30_CON_POW_SEL_P2_TO_P0 BIT(25) +#define USB30_CON_POW_SEL_P0_TO_P3 BIT(24) +#define USB30_CON_POW_SEL_P0_TO_P2 0 +#define USB30_CON_B3_PLLWAKE BIT(23) +#define USB30_CON_B3_CONNECT BIT(17) +#define USB30_CON_B3_HOTRST_CMP BIT(1) + +/* USB_STA */ +#define USB_STA_SPEED_MASK (BIT(2) | BIT(1)) +#define USB_STA_SPEED_HS BIT(2) +#define USB_STA_SPEED_FS BIT(1) +#define USB_STA_SPEED_SS 0 +#define USB_STA_VBUS_STA BIT(0) + +/* DRD_CON */ +#define DRD_CON_PERI_CON BIT(24) + +/* USB_INT_ENA_1 and USB_INT_STA_1 */ +#define USB_INT_1_B3_PLLWKUP BIT(31) +#define USB_INT_1_B3_LUPSUCS BIT(30) +#define USB_INT_1_B3_DISABLE BIT(27) +#define USB_INT_1_B3_WRMRST BIT(21) +#define USB_INT_1_B3_HOTRST BIT(20) +#define USB_INT_1_B2_USBRST BIT(12) +#define USB_INT_1_B2_L1SPND BIT(11) +#define USB_INT_1_B2_SPND BIT(9) +#define USB_INT_1_B2_RSUM BIT(8) +#define USB_INT_1_SPEED BIT(1) +#define USB_INT_1_VBUS_CNG BIT(0) + +/* USB_INT_ENA_2 and USB_INT_STA_2 */ +#define USB_INT_2_PIPE(n) BIT(n) + +/* P0_MOD */ +#define P0_MOD_DIR BIT(6) + +/* P0_CON and PN_CON */ +#define PX_CON_BYTE_EN_MASK (BIT(10) | BIT(9)) +#define PX_CON_BYTE_EN_SHIFT 9 +#define PX_CON_BYTE_EN_BYTES(n) (((n) << PX_CON_BYTE_EN_SHIFT) & \ + PX_CON_BYTE_EN_MASK) +#define PX_CON_SEND BIT(8) + +/* P0_CON */ +#define P0_CON_ST_RES_MASK (BIT(27) | BIT(26)) +#define P0_CON_ST_RES_FORCE_STALL BIT(27) +#define P0_CON_ST_RES_NORMAL BIT(26) +#define P0_CON_ST_RES_FORCE_NRDY 0 +#define P0_CON_OT_RES_MASK (BIT(25) | BIT(24)) +#define P0_CON_OT_RES_FORCE_STALL BIT(25) +#define P0_CON_OT_RES_NORMAL BIT(24) +#define P0_CON_OT_RES_FORCE_NRDY 0 +#define P0_CON_IN_RES_MASK (BIT(17) | BIT(16)) +#define P0_CON_IN_RES_FORCE_STALL BIT(17) +#define P0_CON_IN_RES_NORMAL BIT(16) +#define P0_CON_IN_RES_FORCE_NRDY 0 +#define P0_CON_RES_WEN BIT(7) +#define P0_CON_BCLR BIT(1) + +/* P0_STA and PN_STA */ +#define PX_STA_BUFSTS BIT(0) + +/* P0_INT_ENA and P0_INT_STA */ +#define P0_INT_STSED BIT(18) +#define P0_INT_STSST BIT(17) +#define P0_INT_SETUP BIT(16) +#define P0_INT_RCVNL BIT(8) +#define P0_INT_ERDY BIT(7) +#define P0_INT_FLOW BIT(6) +#define P0_INT_STALL BIT(2) +#define P0_INT_NRDY BIT(1) +#define P0_INT_BFRDY BIT(0) +#define P0_INT_ALL_BITS (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY) + +/* PN_MOD */ +#define PN_MOD_DIR BIT(6) +#define PN_MOD_TYPE_SHIFT 4 +#define PN_MOD_TYPE_MASK GENMASK(5, PN_MOD_TYPE_SHIFT) +#define PN_MOD_TYPE(n) (((n) << PN_MOD_TYPE_SHIFT) & \ + PN_MOD_TYPE_MASK) +#define PN_MOD_EPNUM_MASK GENMASK(3, 0) +#define PN_MOD_EPNUM(n) ((n) & PN_MOD_EPNUM_MASK) + +/* PN_RAMMAP */ +#define PN_RAMMAP_RAMAREA_SHIFT 29 +#define PN_RAMMAP_RAMAREA_MASK GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT) +#define PN_RAMMAP_RAMAREA_16KB BIT(31) +#define PN_RAMMAP_RAMAREA_8KB (BIT(30) | BIT(29)) +#define PN_RAMMAP_RAMAREA_4KB BIT(30) +#define PN_RAMMAP_RAMAREA_2KB BIT(29) +#define PN_RAMMAP_RAMAREA_1KB 0 +#define PN_RAMMAP_MPKT_SHIFT 16 +#define PN_RAMMAP_MPKT_MASK GENMASK(26, PN_RAMMAP_MPKT_SHIFT) +#define PN_RAMMAP_MPKT(n) (((n) << PN_RAMMAP_MPKT_SHIFT) & \ + PN_RAMMAP_MPKT_MASK) +#define PN_RAMMAP_RAMIF_SHIFT 14 +#define PN_RAMMAP_RAMIF_MASK GENMASK(15, PN_RAMMAP_RAMIF_SHIFT) +#define PN_RAMMAP_RAMIF(n) (((n) << PN_RAMMAP_RAMIF_SHIFT) & \ + PN_RAMMAP_RAMIF_MASK) +#define PN_RAMMAP_BASEAD_MASK GENMASK(13, 0) +#define PN_RAMMAP_BASEAD(offs) (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK) +#define PN_RAMMAP_DATA(area, ramif, basead) ((PN_RAMMAP_##area) | \ + (PN_RAMMAP_RAMIF(ramif)) | \ + (PN_RAMMAP_BASEAD(basead))) + +/* PN_CON */ +#define PN_CON_EN BIT(31) +#define PN_CON_DATAIF_EN BIT(30) +#define PN_CON_RES_MASK (BIT(17) | BIT(16)) +#define PN_CON_RES_FORCE_STALL BIT(17) +#define PN_CON_RES_NORMAL BIT(16) +#define PN_CON_RES_FORCE_NRDY 0 +#define PN_CON_LAST BIT(11) +#define PN_CON_RES_WEN BIT(7) +#define PN_CON_CLR BIT(0) + +/* PN_INT_STA and PN_INT_ENA */ +#define PN_INT_LSTTR BIT(4) +#define PN_INT_BFRDY BIT(0) + +/* USB3_SSIFCMD */ +#define SSIFCMD_URES_U2 BIT(9) +#define SSIFCMD_URES_U1 BIT(8) +#define SSIFCMD_UDIR_U2 BIT(7) +#define SSIFCMD_UDIR_U1 BIT(6) +#define SSIFCMD_UREQ_U2 BIT(5) +#define SSIFCMD_UREQ_U1 BIT(4) + +#define USB3_EP0_SS_MAX_PACKET_SIZE 512 +#define USB3_EP0_HSFS_MAX_PACKET_SIZE 64 +#define USB3_EP0_BUF_SIZE 8 +#define USB3_MAX_NUM_PIPES 30 +#define USB3_WAIT_US 3 + +struct renesas_usb3; +struct renesas_usb3_request { + struct usb_request req; + struct list_head queue; +}; + +#define USB3_EP_NAME_SIZE 8 +struct renesas_usb3_ep { + struct usb_ep ep; + struct renesas_usb3 *usb3; + int num; + char ep_name[USB3_EP_NAME_SIZE]; + struct list_head queue; + u32 rammap_val; + bool dir_in; + bool halt; + bool wedge; + bool started; +}; + +struct renesas_usb3_priv { + int ramsize_per_ramif; /* unit = bytes */ + int num_ramif; + int ramsize_per_pipe; /* unit = bytes */ + bool workaround_for_vbus; /* if true, don't check vbus signal */ +}; + +struct renesas_usb3 { + void __iomem *reg; + + struct usb_gadget gadget; + struct usb_gadget_driver *driver; + + struct renesas_usb3_ep *usb3_ep; + int num_usb3_eps; + + spinlock_t lock; + int disabled_count; + + struct usb_request *ep0_req; + u16 test_mode; + u8 ep0_buf[USB3_EP0_BUF_SIZE]; + bool softconnect; + bool workaround_for_vbus; +}; + +#define gadget_to_renesas_usb3(_gadget) \ + container_of(_gadget, struct renesas_usb3, gadget) +#define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget) +#define usb3_to_dev(_usb3) (_usb3->gadget.dev.parent) + +#define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep) +#define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3) +#define usb_req_to_usb3_req(_req) container_of(_req, \ + struct renesas_usb3_request, req) + +#define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n)) +#define usb3_for_each_ep(usb3_ep, usb3, i) \ + for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \ + (i) < (usb3)->num_usb3_eps; \ + (i)++, usb3_ep = usb3_get_ep(usb3, (i))) + +static const char udc_name[] = "renesas_usb3"; + +static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs) +{ + iowrite32(data, usb3->reg + offs); +} + +static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs) +{ + return ioread32(usb3->reg + offs); +} + +static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs) +{ + u32 val = usb3_read(usb3, offs); + + val |= bits; + usb3_write(usb3, val, offs); +} + +static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs) +{ + u32 val = usb3_read(usb3, offs); + + val &= ~bits; + usb3_write(usb3, val, offs); +} + +static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask, + u32 expected) +{ + int i; + + for (i = 0; i < USB3_WAIT_US; i++) { + if ((usb3_read(usb3, reg) & mask) == expected) + return 0; + udelay(1); + } + + dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n", + __func__, reg, mask, expected); + + return -EBUSY; +} + +static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits) +{ + usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1); +} + +static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits) +{ + usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1); +} + +static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num) +{ + usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2); +} + +static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num) +{ + usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2); +} + +static void usb3_init_axi_bridge(struct renesas_usb3 *usb3) +{ + /* Set AXI_INT */ + usb3_write(usb3, ~0, USB3_DMA_INT_STA); + usb3_write(usb3, 0, USB3_DMA_INT_ENA); + usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA); +} + +static void usb3_init_epc_registers(struct renesas_usb3 *usb3) +{ + /* FIXME: How to change host / peripheral mode as well? */ + usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON); + + usb3_write(usb3, ~0, USB3_USB_INT_STA_1); + usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG); +} + +static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3) +{ + if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND)) + return true; /* already waked it up */ + + usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON); + usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM); + + return false; +} + +static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup) +{ + u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT; + + if (usb3->softconnect && pullup) + usb3_set_bit(usb3, bits, USB3_USB20_CON); + else + usb3_clear_bit(usb3, bits, USB3_USB20_CON); +} + +static void usb3_set_test_mode(struct renesas_usb3 *usb3) +{ + u32 val = usb3_read(usb3, USB3_USB20_CON); + + val &= ~USB20_CON_B2_TSTMOD_MASK; + val |= USB20_CON_B2_TSTMOD(usb3->test_mode); + usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON); + if (!usb3->test_mode) + usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON); +} + +static void usb3_start_usb2_connection(struct renesas_usb3 *usb3) +{ + usb3->disabled_count++; + usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); + usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); + usb3_usb2_pullup(usb3, 1); +} + +static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3) +{ + return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3; +} + +static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3) +{ + if (!usb3_is_usb3_phy_in_u3(usb3)) + return true; /* already waked it up */ + + usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON); + usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP); + + return false; +} + +static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3) +{ + u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2; + u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1; + u32 val = usb3_read(usb3, USB3_SSIFCMD); + u16 ret = 0; + + /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */ + if (!(val & mask_u2)) + ret |= 1 << USB_DEV_STAT_U2_ENABLED; + if (!(val & mask_u1)) + ret |= 1 << USB_DEV_STAT_U1_ENABLED; + + return ret; +} + +static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable) +{ + u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2; + + /* Enables U2 if the bits of UDIR and UREQ are set to 0 */ + if (enable) + usb3_clear_bit(usb3, bits, USB3_SSIFCMD); + else + usb3_set_bit(usb3, bits, USB3_SSIFCMD); +} + +static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable) +{ + u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1; + + /* Enables U1 if the bits of UDIR and UREQ are set to 0 */ + if (enable) + usb3_clear_bit(usb3, bits, USB3_SSIFCMD); + else + usb3_set_bit(usb3, bits, USB3_SSIFCMD); +} + +static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3) +{ + usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); + usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); + usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); +} + +static void usb3_start_usb3_connection(struct renesas_usb3 *usb3) +{ + usb3_start_operation_for_usb3(usb3); + usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON); + + usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE | + USB_INT_1_SPEED); +} + +static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3) +{ + usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); +} + +static void usb3_transition_to_default_state(struct renesas_usb3 *usb3, + bool is_usb3) +{ + usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2); + usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA); + usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA); + + if (is_usb3) + usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST | + USB_INT_1_B3_HOTRST); + else + usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND | + USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST); +} + +static void usb3_connect(struct renesas_usb3 *usb3) +{ + if (usb3_wakeup_usb3_phy(usb3)) + usb3_start_usb3_connection(usb3); +} + +static void usb3_reset_epc(struct renesas_usb3 *usb3) +{ + usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); + usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); + usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON); + usb3->test_mode = 0; + usb3_set_test_mode(usb3); +} + +static void usb3_disconnect(struct renesas_usb3 *usb3) +{ + usb3->disabled_count = 0; + usb3_usb2_pullup(usb3, 0); + usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); + usb3_reset_epc(usb3); + + if (usb3->driver) + usb3->driver->disconnect(&usb3->gadget); +} + +static void usb3_check_vbus(struct renesas_usb3 *usb3) +{ + if (usb3->workaround_for_vbus) { + usb3_connect(usb3); + } else { + if (usb3_read(usb3, USB3_USB_STA) & USB_STA_VBUS_STA) + usb3_connect(usb3); + else + usb3_disconnect(usb3); + } +} + +static void renesas_usb3_init_controller(struct renesas_usb3 *usb3) +{ + usb3_init_axi_bridge(usb3); + usb3_init_epc_registers(usb3); + + usb3_check_vbus(usb3); +} + +static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3) +{ + usb3_disconnect(usb3); + usb3_write(usb3, 0, USB3_P0_INT_ENA); + usb3_write(usb3, 0, USB3_PN_INT_ENA); + usb3_write(usb3, 0, USB3_USB_INT_ENA_1); + usb3_write(usb3, 0, USB3_USB_INT_ENA_2); + usb3_write(usb3, 0, USB3_AXI_INT_ENA); +} + +static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3) +{ + usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP); + usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON); + usb3_start_usb3_connection(usb3); +} + +static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3) +{ + usb3_transition_to_default_state(usb3, true); +} + +static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3) +{ + usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM); + usb3_start_usb2_connection(usb3); + usb3_transition_to_default_state(usb3, false); +} + +static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3) +{ + usb3_stop_usb3_connection(usb3); + if (usb3_wakeup_usb2_phy(usb3)) + usb3_irq_epc_int_1_resume(usb3); +} + +static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3) +{ + usb3_reset_epc(usb3); + if (usb3->disabled_count < 3) + usb3_start_usb3_connection(usb3); + else + usb3_start_usb2_connection(usb3); +} + +static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3) +{ + usb3_check_vbus(usb3); +} + +static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3) +{ + usb3_reset_epc(usb3); + usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); + + /* This bit shall be set within 12ms from the start of HotReset */ + usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON); +} + +static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3) +{ + usb3_reset_epc(usb3); + usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); + + usb3_start_operation_for_usb3(usb3); + usb3_enable_irq_1(usb3, USB_INT_1_SPEED); +} + +static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3) +{ + u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK; + + switch (speed) { + case USB_STA_SPEED_SS: + usb3->gadget.speed = USB_SPEED_SUPER; + break; + case USB_STA_SPEED_HS: + usb3->gadget.speed = USB_SPEED_HIGH; + break; + case USB_STA_SPEED_FS: + usb3->gadget.speed = USB_SPEED_FULL; + break; + default: + usb3->gadget.speed = USB_SPEED_UNKNOWN; + break; + } +} + +static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1) +{ + if (int_sta_1 & USB_INT_1_B3_PLLWKUP) + usb3_irq_epc_int_1_pll_wakeup(usb3); + + if (int_sta_1 & USB_INT_1_B3_LUPSUCS) + usb3_irq_epc_int_1_linkup_success(usb3); + + if (int_sta_1 & USB_INT_1_B3_HOTRST) + usb3_irq_epc_int_1_hot_reset(usb3); + + if (int_sta_1 & USB_INT_1_B3_WRMRST) + usb3_irq_epc_int_1_warm_reset(usb3); + + if (int_sta_1 & USB_INT_1_B3_DISABLE) + usb3_irq_epc_int_1_disable(usb3); + + if (int_sta_1 & USB_INT_1_B2_USBRST) + usb3_irq_epc_int_1_bus_reset(usb3); + + if (int_sta_1 & USB_INT_1_B2_RSUM) + usb3_irq_epc_int_1_resume(usb3); + + if (int_sta_1 & USB_INT_1_SPEED) + usb3_irq_epc_int_1_speed(usb3); + + if (int_sta_1 & USB_INT_1_VBUS_CNG) + usb3_irq_epc_int_1_vbus_change(usb3); +} + +static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep + *usb3_ep) +{ + return list_first_entry_or_null(&usb3_ep->queue, + struct renesas_usb3_request, queue); +} + +static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep + *usb3_ep) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + struct renesas_usb3_request *usb3_req; + unsigned long flags; + + spin_lock_irqsave(&usb3->lock, flags); + usb3_req = __usb3_get_request(usb3_ep); + spin_unlock_irqrestore(&usb3->lock, flags); + + return usb3_req; +} + +static void usb3_request_done(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req, int status) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + unsigned long flags; + + dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n", + usb3_ep->num, usb3_req->req.length, usb3_req->req.actual, + status); + usb3_req->req.status = status; + spin_lock_irqsave(&usb3->lock, flags); + usb3_ep->started = false; + list_del_init(&usb3_req->queue); + spin_unlock_irqrestore(&usb3->lock, flags); + usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req); +} + +static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3) +{ + struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); + struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); + + if (usb3_req) + usb3_request_done(usb3_ep, usb3_req, 0); + if (usb3->test_mode) + usb3_set_test_mode(usb3); +} + +static void usb3_get_setup_data(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl) +{ + struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); + u32 *data = (u32 *)ctrl; + + *data++ = usb3_read(usb3, USB3_STUP_DAT_0); + *data = usb3_read(usb3, USB3_STUP_DAT_1); + + /* update this driver's flag */ + usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN); +} + +static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res) +{ + u32 val = usb3_read(usb3, USB3_P0_CON); + + val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK); + val |= res | P0_CON_RES_WEN; + usb3_write(usb3, val, USB3_P0_CON); +} + +static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3) +{ + usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | + P0_CON_OT_RES_FORCE_STALL | + P0_CON_IN_RES_NORMAL); +} + +static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3) +{ + usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | + P0_CON_OT_RES_FORCE_STALL | + P0_CON_IN_RES_NORMAL); +} + +static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3) +{ + usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | + P0_CON_OT_RES_NORMAL | + P0_CON_IN_RES_FORCE_STALL); +} + +static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3) +{ + usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | + P0_CON_OT_RES_NORMAL | + P0_CON_IN_RES_FORCE_STALL); +} + +static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3) +{ + usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | + P0_CON_OT_RES_FORCE_STALL | + P0_CON_IN_RES_FORCE_STALL); +} + +static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3) +{ + usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL | + P0_CON_OT_RES_FORCE_STALL | + P0_CON_IN_RES_FORCE_STALL); +} + +static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3) +{ + usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | + P0_CON_OT_RES_FORCE_NRDY | + P0_CON_IN_RES_FORCE_NRDY); +} + +static int usb3_pn_change(struct renesas_usb3 *usb3, int num) +{ + if (num == 0 || num > usb3->num_usb3_eps) + return -ENXIO; + + usb3_write(usb3, num, USB3_PIPE_COM); + + return 0; +} + +static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res) +{ + u32 val = usb3_read(usb3, USB3_PN_CON); + + val &= ~PN_CON_RES_MASK; + val |= res & PN_CON_RES_MASK; + val |= PN_CON_RES_WEN; + usb3_write(usb3, val, USB3_PN_CON); +} + +static void usb3_pn_start(struct renesas_usb3 *usb3) +{ + usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL); +} + +static void usb3_pn_stop(struct renesas_usb3 *usb3) +{ + usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY); +} + +static void usb3_pn_stall(struct renesas_usb3 *usb3) +{ + usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL); +} + +static int usb3_pn_con_clear(struct renesas_usb3 *usb3) +{ + usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON); + + return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0); +} + +static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req) +{ + struct usb_request *req = &usb3_req->req; + + if ((!req->zero && req->actual == req->length) || + (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0)) + return true; + else + return false; +} + +static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA; + + return usb3_wait(usb3, sta_reg, mask, mask); +} + +static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes, + bool last) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON; + u32 val = usb3_read(usb3, con_reg); + + val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes); + val |= (usb3_ep->num && last) ? PN_CON_LAST : 0; + usb3_write(usb3, val, con_reg); +} + +static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req, + u32 fifo_reg) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + int i; + int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual, + usb3_ep->ep.maxpacket); + u8 *buf = usb3_req->req.buf + usb3_req->req.actual; + u32 tmp = 0; + bool is_last; + + if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0) + return -EBUSY; + + /* Update gadget driver parameter */ + usb3_req->req.actual += len; + + /* Write data to the register */ + if (len >= 4) { + iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4); + buf += (len / 4) * 4; + len %= 4; /* update len to use usb3_set_pX_con_send() */ + } + + if (len) { + for (i = 0; i < len; i++) + tmp |= buf[i] << (8 * i); + usb3_write(usb3, tmp, fifo_reg); + } + + is_last = usb3_is_transfer_complete(usb3_ep, usb3_req); + /* Send the data */ + usb3_set_px_con_send(usb3_ep, len, is_last); + + return is_last ? 0 : -EAGAIN; +} + +static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG; + + return usb3_read(usb3, lng_reg); +} + +static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req, u32 fifo_reg) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + int i; + int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual, + usb3_get_received_length(usb3_ep)); + u8 *buf = usb3_req->req.buf + usb3_req->req.actual; + u32 tmp = 0; + + if (!len) + return 0; + + /* Update gadget driver parameter */ + usb3_req->req.actual += len; + + /* Read data from the register */ + if (len >= 4) { + ioread32_rep(usb3->reg + fifo_reg, buf, len / 4); + buf += (len / 4) * 4; + len %= 4; + } + + if (len) { + tmp = usb3_read(usb3, fifo_reg); + for (i = 0; i < len; i++) + buf[i] = (tmp >> (8 * i)) & 0xff; + } + + return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN; +} + +static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + + if (usb3_ep->dir_in) { + usb3_set_p0_con_for_ctrl_read_status(usb3); + } else { + if (!usb3_req->req.length) + usb3_set_p0_con_for_no_data(usb3); + else + usb3_set_p0_con_for_ctrl_write_status(usb3); + } +} + +static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req) +{ + int ret = -EAGAIN; + + if (usb3_ep->dir_in) + ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE); + else + ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ); + + if (!ret) + usb3_set_status_stage(usb3_ep, usb3_req); +} + +static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + + if (usb3_ep->started) + return; + + usb3_ep->started = true; + + if (usb3_ep->dir_in) { + usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD); + usb3_set_p0_con_for_ctrl_read_data(usb3); + } else { + usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD); + usb3_set_p0_con_for_ctrl_write_data(usb3); + } + + usb3_p0_xfer(usb3_ep, usb3_req); +} + +static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep); + unsigned long flags; + int ret = -EAGAIN; + u32 enable_bits = 0; + + if (usb3_ep->halt || usb3_ep->started) + return; + if (usb3_req != usb3_req_first) + return; + + spin_lock_irqsave(&usb3->lock, flags); + if (usb3_pn_change(usb3, usb3_ep->num) < 0) + goto out; + + usb3_ep->started = true; + usb3_pn_start(usb3); + + if (usb3_ep->dir_in) { + ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE); + enable_bits |= PN_INT_LSTTR; + } + + if (ret < 0) + enable_bits |= PN_INT_BFRDY; + + if (enable_bits) { + usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA); + usb3_enable_pipe_irq(usb3, usb3_ep->num); + } +out: + spin_unlock_irqrestore(&usb3->lock, flags); +} + +static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req, + gfp_t gfp_flags) +{ + struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); + struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + unsigned long flags; + + dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num, + _req->length); + + _req->status = -EINPROGRESS; + _req->actual = 0; + spin_lock_irqsave(&usb3->lock, flags); + list_add_tail(&usb3_req->queue, &usb3_ep->queue); + spin_unlock_irqrestore(&usb3->lock, flags); + + if (!usb3_ep->num) + usb3_start_pipe0(usb3_ep, usb3_req); + else + usb3_start_pipen(usb3_ep, usb3_req); + + return 0; +} + +static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr) +{ + /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */ + usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON); +} + +static bool usb3_std_req_set_address(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl) +{ + if (ctrl->wValue >= 128) + return true; /* stall */ + + usb3_set_device_address(usb3, ctrl->wValue); + usb3_set_p0_con_for_no_data(usb3); + + return false; +} + +static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3, + void *tx_data, size_t len, + void (*complete)(struct usb_ep *ep, + struct usb_request *req)) +{ + struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); + + if (tx_data) + memcpy(usb3->ep0_buf, tx_data, + min_t(size_t, len, USB3_EP0_BUF_SIZE)); + + usb3->ep0_req->buf = &usb3->ep0_buf; + usb3->ep0_req->length = len; + usb3->ep0_req->complete = complete; + renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC); +} + +static void usb3_pipe0_get_status_completion(struct usb_ep *ep, + struct usb_request *req) +{ +} + +static bool usb3_std_req_get_status(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl) +{ + bool stall = false; + struct renesas_usb3_ep *usb3_ep; + int num; + u16 status = 0; + + switch (ctrl->bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + if (usb3->gadget.is_selfpowered) + status |= 1 << USB_DEVICE_SELF_POWERED; + if (usb3->gadget.speed == USB_SPEED_SUPER) + status |= usb3_feature_get_un_enabled(usb3); + break; + case USB_RECIP_INTERFACE: + break; + case USB_RECIP_ENDPOINT: + num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; + usb3_ep = usb3_get_ep(usb3, num); + if (usb3_ep->halt) + status |= 1 << USB_ENDPOINT_HALT; + break; + default: + stall = true; + break; + } + + if (!stall) { + status = cpu_to_le16(status); + dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n", + usb_req_to_usb3_req(usb3->ep0_req)); + usb3_pipe0_internal_xfer(usb3, &status, sizeof(status), + usb3_pipe0_get_status_completion); + } + + return stall; +} + +static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl, bool set) +{ + bool stall = true; + u16 w_value = le16_to_cpu(ctrl->wValue); + + switch (w_value) { + case USB_DEVICE_TEST_MODE: + if (!set) + break; + usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8; + stall = false; + break; + case USB_DEVICE_U1_ENABLE: + case USB_DEVICE_U2_ENABLE: + if (usb3->gadget.speed != USB_SPEED_SUPER) + break; + if (w_value == USB_DEVICE_U1_ENABLE) + usb3_feature_u1_enable(usb3, set); + if (w_value == USB_DEVICE_U2_ENABLE) + usb3_feature_u2_enable(usb3, set); + stall = false; + break; + default: + break; + } + + return stall; +} + +static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + + if (unlikely(usb3_ep->num)) + return -EINVAL; + + usb3_ep->halt = halt; + if (halt) + usb3_set_p0_con_stall(usb3); + else + usb3_set_p0_con_stop(usb3); + + return 0; +} + +static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt, + bool is_clear_feature) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + unsigned long flags; + + spin_lock_irqsave(&usb3->lock, flags); + if (!usb3_pn_change(usb3, usb3_ep->num)) { + usb3_ep->halt = halt; + if (halt) { + usb3_pn_stall(usb3); + } else if (!is_clear_feature || !usb3_ep->wedge) { + usb3_pn_con_clear(usb3); + usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); + usb3_pn_stop(usb3); + } + } + spin_unlock_irqrestore(&usb3->lock, flags); + + return 0; +} + +static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt, + bool is_clear_feature) +{ + int ret = 0; + + if (halt && usb3_ep->started) + return -EAGAIN; + + if (usb3_ep->num) + ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature); + else + ret = usb3_set_halt_p0(usb3_ep, halt); + + return ret; +} + +static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl, + bool set) +{ + int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; + struct renesas_usb3_ep *usb3_ep; + struct renesas_usb3_request *usb3_req; + + if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT) + return true; /* stall */ + + usb3_ep = usb3_get_ep(usb3, num); + usb3_set_halt(usb3_ep, set, true); + + /* Restarts a queue if clear feature */ + if (!set) { + usb3_ep->started = false; + usb3_req = usb3_get_request(usb3_ep); + if (usb3_req) + usb3_start_pipen(usb3_ep, usb3_req); + } + + return false; +} + +static bool usb3_std_req_feature(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl, bool set) +{ + bool stall = false; + + switch (ctrl->bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + stall = usb3_std_req_feature_device(usb3, ctrl, set); + break; + case USB_RECIP_INTERFACE: + break; + case USB_RECIP_ENDPOINT: + stall = usb3_std_req_feature_endpoint(usb3, ctrl, set); + break; + default: + stall = true; + break; + } + + if (!stall) + usb3_set_p0_con_for_no_data(usb3); + + return stall; +} + +static void usb3_pipe0_set_sel_completion(struct usb_ep *ep, + struct usb_request *req) +{ + /* TODO */ +} + +static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl) +{ + u16 w_length = le16_to_cpu(ctrl->wLength); + + if (w_length != 6) + return true; /* stall */ + + dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n", + usb_req_to_usb3_req(usb3->ep0_req)); + usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion); + + return false; +} + +static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl) +{ + if (ctrl->wValue > 0) + usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); + else + usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); + + return false; +} + +/** + * usb3_handle_standard_request - handle some standard requests + * @usb3: the renesas_usb3 pointer + * @ctrl: a pointer of setup data + * + * Returns true if this function handled a standard request + */ +static bool usb3_handle_standard_request(struct renesas_usb3 *usb3, + struct usb_ctrlrequest *ctrl) +{ + bool ret = false; + bool stall = false; + + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { + switch (ctrl->bRequest) { + case USB_REQ_SET_ADDRESS: + stall = usb3_std_req_set_address(usb3, ctrl); + ret = true; + break; + case USB_REQ_GET_STATUS: + stall = usb3_std_req_get_status(usb3, ctrl); + ret = true; + break; + case USB_REQ_CLEAR_FEATURE: + stall = usb3_std_req_feature(usb3, ctrl, false); + ret = true; + break; + case USB_REQ_SET_FEATURE: + stall = usb3_std_req_feature(usb3, ctrl, true); + ret = true; + break; + case USB_REQ_SET_SEL: + stall = usb3_std_req_set_sel(usb3, ctrl); + ret = true; + break; + case USB_REQ_SET_ISOCH_DELAY: + /* This hardware doesn't support Isochronous xfer */ + stall = true; + ret = true; + break; + case USB_REQ_SET_CONFIGURATION: + usb3_std_req_set_configuration(usb3, ctrl); + break; + default: + break; + } + } + + if (stall) + usb3_set_p0_con_stall(usb3); + + return ret; +} + +static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3) +{ + usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON); + + return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0); +} + +static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3) +{ + struct usb_ctrlrequest ctrl; + struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); + + /* Call giveback function if previous transfer is not completed */ + if (usb3_ep->started) + usb3_request_done(usb3_ep, usb3_get_request(usb3_ep), + -ECONNRESET); + + usb3_p0_con_clear_buffer(usb3); + usb3_get_setup_data(usb3, &ctrl); + if (!usb3_handle_standard_request(usb3, &ctrl)) + if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0) + usb3_set_p0_con_stall(usb3); +} + +static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3) +{ + struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); + struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); + + if (!usb3_req) + return; + + usb3_p0_xfer(usb3_ep, usb3_req); +} + +static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3) +{ + u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA); + + p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA); + usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA); + if (p0_int_sta & P0_INT_STSED) + usb3_irq_epc_pipe0_status_end(usb3); + if (p0_int_sta & P0_INT_SETUP) + usb3_irq_epc_pipe0_setup(usb3); + if (p0_int_sta & P0_INT_BFRDY) + usb3_irq_epc_pipe0_bfrdy(usb3); +} + +static void usb3_request_done_pipen(struct renesas_usb3 *usb3, + struct renesas_usb3_ep *usb3_ep, + struct renesas_usb3_request *usb3_req, + int status) +{ + usb3_pn_stop(usb3); + usb3_disable_pipe_irq(usb3, usb3_ep->num); + usb3_request_done(usb3_ep, usb3_req, status); + + /* get next usb3_req */ + usb3_req = usb3_get_request(usb3_ep); + if (usb3_req) + usb3_start_pipen(usb3_ep, usb3_req); +} + +static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num) +{ + struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num); + struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); + + if (!usb3_req) + return; + + if (usb3_ep->dir_in) { + dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n", + __func__, usb3_req->req.length, usb3_req->req.actual); + usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0); + } +} + +static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num) +{ + struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num); + struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); + + if (!usb3_req) + return; + + if (usb3_ep->dir_in) { + /* Do not stop the IN pipe here to detect LSTTR interrupt */ + if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE)) + usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA); + } else { + if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ)) + usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0); + } +} + +static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num) +{ + u32 pn_int_sta; + + if (usb3_pn_change(usb3, num) < 0) + return; + + pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA); + pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA); + usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA); + if (pn_int_sta & PN_INT_LSTTR) + usb3_irq_epc_pipen_lsttr(usb3, num); + if (pn_int_sta & PN_INT_BFRDY) + usb3_irq_epc_pipen_bfrdy(usb3, num); +} + +static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2) +{ + int i; + + for (i = 0; i < usb3->num_usb3_eps; i++) { + if (int_sta_2 & USB_INT_2_PIPE(i)) { + if (!i) + usb3_irq_epc_pipe0(usb3); + else + usb3_irq_epc_pipen(usb3, i); + } + } +} + +static void usb3_irq_epc(struct renesas_usb3 *usb3) +{ + u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1); + u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2); + + int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1); + if (int_sta_1) { + usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1); + usb3_irq_epc_int_1(usb3, int_sta_1); + } + + int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2); + if (int_sta_2) + usb3_irq_epc_int_2(usb3, int_sta_2); +} + +static irqreturn_t renesas_usb3_irq(int irq, void *_usb3) +{ + struct renesas_usb3 *usb3 = _usb3; + irqreturn_t ret = IRQ_NONE; + u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA); + + if (axi_int_sta & AXI_INT_EPCINT) { + usb3_irq_epc(usb3); + ret = IRQ_HANDLED; + } + + return ret; +} + +static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep, + const struct usb_endpoint_descriptor *desc) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + u32 val = 0; + + val |= usb3_ep->dir_in ? PN_MOD_DIR : 0; + val |= PN_MOD_TYPE(usb_endpoint_type(desc)); + val |= PN_MOD_EPNUM(usb_endpoint_num(desc)); + usb3_write(usb3, val, USB3_PN_MOD); +} + +static u32 usb3_calc_ramarea(int ram_size) +{ + WARN_ON(ram_size > SZ_16K); + + if (ram_size <= SZ_1K) + return PN_RAMMAP_RAMAREA_1KB; + else if (ram_size <= SZ_2K) + return PN_RAMMAP_RAMAREA_2KB; + else if (ram_size <= SZ_4K) + return PN_RAMMAP_RAMAREA_4KB; + else if (ram_size <= SZ_8K) + return PN_RAMMAP_RAMAREA_8KB; + else + return PN_RAMMAP_RAMAREA_16KB; +} + +static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep, + const struct usb_endpoint_descriptor *desc) +{ + return usb3_ep->rammap_val | PN_RAMMAP_MPKT(usb_endpoint_maxp(desc)); +} + +static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep, + const struct usb_endpoint_descriptor *desc) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + unsigned long flags; + + usb3_ep->dir_in = usb_endpoint_dir_in(desc); + + spin_lock_irqsave(&usb3->lock, flags); + if (!usb3_pn_change(usb3, usb3_ep->num)) { + usb3_write_pn_mod(usb3_ep, desc); + usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc), + USB3_PN_RAMMAP); + usb3_pn_con_clear(usb3); + usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); + } + spin_unlock_irqrestore(&usb3->lock, flags); + + return 0; +} + +static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep) +{ + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + unsigned long flags; + + usb3_ep->halt = false; + + spin_lock_irqsave(&usb3->lock, flags); + if (!usb3_pn_change(usb3, usb3_ep->num)) { + usb3_write(usb3, 0, USB3_PN_RAMMAP); + usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON); + } + spin_unlock_irqrestore(&usb3->lock, flags); + + return 0; +} + +/*------- usb_ep_ops -----------------------------------------------------*/ +static int renesas_usb3_ep_enable(struct usb_ep *_ep, + const struct usb_endpoint_descriptor *desc) +{ + struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); + + return usb3_enable_pipe_n(usb3_ep, desc); +} + +static int renesas_usb3_ep_disable(struct usb_ep *_ep) +{ + struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); + struct renesas_usb3_request *usb3_req; + + do { + usb3_req = usb3_get_request(usb3_ep); + if (!usb3_req) + break; + usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN); + } while (1); + + return usb3_disable_pipe_n(usb3_ep); +} + +static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags) +{ + struct renesas_usb3_request *usb3_req; + + usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags); + if (!usb3_req) + return NULL; + + INIT_LIST_HEAD(&usb3_req->queue); + + return &usb3_req->req; +} + +static void __renesas_usb3_ep_free_request(struct usb_request *_req) +{ + struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); + + kfree(usb3_req); +} + +static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep, + gfp_t gfp_flags) +{ + return __renesas_usb3_ep_alloc_request(gfp_flags); +} + +static void renesas_usb3_ep_free_request(struct usb_ep *_ep, + struct usb_request *_req) +{ + __renesas_usb3_ep_free_request(_req); +} + +static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) +{ + struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); + struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + + dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num, + _req->length); + + usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET); + + return 0; +} + +static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value) +{ + return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false); +} + +static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep) +{ + struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); + + usb3_ep->wedge = true; + return usb3_set_halt(usb3_ep, true, false); +} + +static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep) +{ + struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); + struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); + unsigned long flags; + + if (usb3_ep->num) { + spin_lock_irqsave(&usb3->lock, flags); + if (!usb3_pn_change(usb3, usb3_ep->num)) { + usb3_pn_con_clear(usb3); + usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); + } + spin_unlock_irqrestore(&usb3->lock, flags); + } else { + usb3_p0_con_clear_buffer(usb3); + } +} + +static struct usb_ep_ops renesas_usb3_ep_ops = { + .enable = renesas_usb3_ep_enable, + .disable = renesas_usb3_ep_disable, + + .alloc_request = renesas_usb3_ep_alloc_request, + .free_request = renesas_usb3_ep_free_request, + + .queue = renesas_usb3_ep_queue, + .dequeue = renesas_usb3_ep_dequeue, + + .set_halt = renesas_usb3_ep_set_halt, + .set_wedge = renesas_usb3_ep_set_wedge, + .fifo_flush = renesas_usb3_ep_fifo_flush, +}; + +/*------- usb_gadget_ops -------------------------------------------------*/ +static int renesas_usb3_start(struct usb_gadget *gadget, + struct usb_gadget_driver *driver) +{ + struct renesas_usb3 *usb3; + + if (!driver || driver->max_speed < USB_SPEED_FULL || + !driver->setup) + return -EINVAL; + + usb3 = gadget_to_renesas_usb3(gadget); + + /* hook up the driver */ + usb3->driver = driver; + + renesas_usb3_init_controller(usb3); + + return 0; +} + +static int renesas_usb3_stop(struct usb_gadget *gadget) +{ + struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget); + unsigned long flags; + + spin_lock_irqsave(&usb3->lock, flags); + usb3->softconnect = false; + usb3->gadget.speed = USB_SPEED_UNKNOWN; + usb3->driver = NULL; + renesas_usb3_stop_controller(usb3); + spin_unlock_irqrestore(&usb3->lock, flags); + + return 0; +} + +static int renesas_usb3_get_frame(struct usb_gadget *_gadget) +{ + return -EOPNOTSUPP; +} + +static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on) +{ + struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget); + + usb3->softconnect = !!is_on; + + return 0; +} + +static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self) +{ + gadget->is_selfpowered = !!is_self; + + return 0; +} + +static const struct usb_gadget_ops renesas_usb3_gadget_ops = { + .get_frame = renesas_usb3_get_frame, + .udc_start = renesas_usb3_start, + .udc_stop = renesas_usb3_stop, + .pullup = renesas_usb3_pullup, + .set_selfpowered = renesas_usb3_set_selfpowered, +}; + +/*------- platform_driver ------------------------------------------------*/ +static int renesas_usb3_remove(struct platform_device *pdev) +{ + struct renesas_usb3 *usb3 = platform_get_drvdata(pdev); + + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + usb_del_gadget_udc(&usb3->gadget); + + __renesas_usb3_ep_free_request(usb3->ep0_req); + + return 0; +} + +static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev, + const struct renesas_usb3_priv *priv) +{ + struct renesas_usb3_ep *usb3_ep; + int i; + + /* calculate num_usb3_eps from renesas_usb3_priv */ + usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 / + priv->ramsize_per_pipe + 1; + + if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES) + usb3->num_usb3_eps = USB3_MAX_NUM_PIPES; + + usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps, + GFP_KERNEL); + if (!usb3->usb3_ep) + return -ENOMEM; + + dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps); + /* + * This driver prepares pipes as the followings: + * - odd pipes = IN pipe + * - even pipes = OUT pipe (except pipe 0) + */ + usb3_for_each_ep(usb3_ep, usb3, i) { + snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i); + usb3_ep->usb3 = usb3; + usb3_ep->num = i; + usb3_ep->ep.name = usb3_ep->ep_name; + usb3_ep->ep.ops = &renesas_usb3_ep_ops; + INIT_LIST_HEAD(&usb3_ep->queue); + INIT_LIST_HEAD(&usb3_ep->ep.ep_list); + if (!i) { + /* for control pipe */ + usb3->gadget.ep0 = &usb3_ep->ep; + usb_ep_set_maxpacket_limit(&usb3_ep->ep, + USB3_EP0_HSFS_MAX_PACKET_SIZE); + usb3_ep->ep.caps.type_control = true; + usb3_ep->ep.caps.dir_in = true; + usb3_ep->ep.caps.dir_out = true; + continue; + } + + /* for bulk or interrupt pipe */ + usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0); + list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list); + usb3_ep->ep.caps.type_bulk = true; + usb3_ep->ep.caps.type_int = true; + if (i & 1) + usb3_ep->ep.caps.dir_in = true; + else + usb3_ep->ep.caps.dir_out = true; + } + + return 0; +} + +static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev, + const struct renesas_usb3_priv *priv) +{ + struct renesas_usb3_ep *usb3_ep; + int i; + u32 ramif[2], basead[2]; /* index 0 = for IN pipes */ + u32 *cur_ramif, *cur_basead; + u32 val; + + memset(ramif, 0, sizeof(ramif)); + memset(basead, 0, sizeof(basead)); + + /* + * This driver prepares pipes as the followings: + * - all pipes = the same size as "ramsize_per_pipe" + * Please refer to the "Method of Specifying RAM Mapping" + */ + usb3_for_each_ep(usb3_ep, usb3, i) { + if (!i) + continue; /* out of scope if ep num = 0 */ + if (usb3_ep->ep.caps.dir_in) { + cur_ramif = &ramif[0]; + cur_basead = &basead[0]; + } else { + cur_ramif = &ramif[1]; + cur_basead = &basead[1]; + } + + if (*cur_basead > priv->ramsize_per_ramif) + continue; /* out of memory for IN or OUT pipe */ + + /* calculate rammap_val */ + val = PN_RAMMAP_RAMIF(*cur_ramif); + val |= usb3_calc_ramarea(priv->ramsize_per_pipe); + val |= PN_RAMMAP_BASEAD(*cur_basead); + usb3_ep->rammap_val = val; + + dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n", + i, val, *cur_ramif, *cur_basead); + + /* update current ramif */ + if (*cur_ramif + 1 == priv->num_ramif) { + *cur_ramif = 0; + *cur_basead += priv->ramsize_per_pipe; + } else { + (*cur_ramif)++; + } + } +} + +static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795 = { + .ramsize_per_ramif = SZ_16K, + .num_ramif = 2, + .ramsize_per_pipe = SZ_4K, + .workaround_for_vbus = true, +}; + +static const struct of_device_id usb3_of_match[] = { + { + .compatible = "renesas,r8a7795-usb3-peri", + .data = &renesas_usb3_priv_r8a7795, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, usb3_of_match); + +static int renesas_usb3_probe(struct platform_device *pdev) +{ + struct renesas_usb3 *usb3; + struct resource *res; + const struct of_device_id *match; + int irq, ret; + const struct renesas_usb3_priv *priv; + + match = of_match_node(usb3_of_match, pdev->dev.of_node); + if (!match) + return -ENODEV; + priv = match->data; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -ENODEV; + + usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL); + if (!usb3) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + usb3->reg = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(usb3->reg)) + return PTR_ERR(usb3->reg); + + platform_set_drvdata(pdev, usb3); + spin_lock_init(&usb3->lock); + + usb3->gadget.ops = &renesas_usb3_gadget_ops; + usb3->gadget.name = udc_name; + usb3->gadget.max_speed = USB_SPEED_SUPER; + INIT_LIST_HEAD(&usb3->gadget.ep_list); + ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv); + if (ret < 0) + return ret; + renesas_usb3_init_ram(usb3, &pdev->dev, priv); + + ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0, + dev_name(&pdev->dev), usb3); + if (ret < 0) + return ret; + + /* for ep0 handling */ + usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL); + if (!usb3->ep0_req) + return -ENOMEM; + + ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget); + if (ret < 0) + goto err_add_udc; + + usb3->workaround_for_vbus = priv->workaround_for_vbus; + + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + dev_info(&pdev->dev, "probed\n"); + + return 0; + +err_add_udc: + __renesas_usb3_ep_free_request(usb3->ep0_req); + + return ret; +} + +static struct platform_driver renesas_usb3_driver = { + .probe = renesas_usb3_probe, + .remove = renesas_usb3_remove, + .driver = { + .name = (char *)udc_name, + .of_match_table = of_match_ptr(usb3_of_match), + }, +}; +module_platform_driver(renesas_usb3_driver); + +MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>"); +MODULE_ALIAS("platform:renesas_usb3"); diff --git a/drivers/usb/gadget/udc/s3c-hsudc.c b/drivers/usb/gadget/udc/s3c-hsudc.c index e9def42ce50d..82a9e2a3bedc 100644 --- a/drivers/usb/gadget/udc/s3c-hsudc.c +++ b/drivers/usb/gadget/udc/s3c-hsudc.c @@ -569,7 +569,7 @@ static int s3c_hsudc_handle_reqfeat(struct s3c_hsudc *hsudc, hsep = &hsudc->ep[ep_num]; switch (le16_to_cpu(ctrl->wValue)) { case USB_ENDPOINT_HALT: - if (set || (!set && !hsep->wedge)) + if (set || !hsep->wedge) s3c_hsudc_set_halt(&hsep->ep, set); return 0; } diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c index f660afba715d..fd73a3ea07c2 100644 --- a/drivers/usb/gadget/udc/udc-core.c +++ b/drivers/usb/gadget/udc/udc-core.c @@ -51,8 +51,12 @@ struct usb_udc { static struct class *udc_class; static LIST_HEAD(udc_list); +static LIST_HEAD(gadget_driver_pending_list); static DEFINE_MUTEX(udc_lock); +static int udc_bind_to_driver(struct usb_udc *udc, + struct usb_gadget_driver *driver); + /* ------------------------------------------------------------------------- */ #ifdef CONFIG_HAS_DMA @@ -356,6 +360,7 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, void (*release)(struct device *dev)) { struct usb_udc *udc; + struct usb_gadget_driver *driver; int ret = -ENOMEM; udc = kzalloc(sizeof(*udc), GFP_KERNEL); @@ -403,6 +408,18 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); udc->vbus = true; + /* pick up one of pending gadget drivers */ + list_for_each_entry(driver, &gadget_driver_pending_list, pending) { + if (!driver->udc_name || strcmp(driver->udc_name, + dev_name(&udc->dev)) == 0) { + ret = udc_bind_to_driver(udc, driver); + if (ret) + goto err4; + list_del(&driver->pending); + break; + } + } + mutex_unlock(&udc_lock); return 0; @@ -473,10 +490,14 @@ void usb_del_gadget_udc(struct usb_gadget *gadget) mutex_lock(&udc_lock); list_del(&udc->list); - mutex_unlock(&udc_lock); - if (udc->driver) + if (udc->driver) { + struct usb_gadget_driver *driver = udc->driver; + usb_gadget_remove_driver(udc); + list_add(&driver->pending, &gadget_driver_pending_list); + } + mutex_unlock(&udc_lock); kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); flush_work(&gadget->work); @@ -520,50 +541,36 @@ err1: return ret; } -int usb_udc_attach_driver(const char *name, struct usb_gadget_driver *driver) -{ - struct usb_udc *udc = NULL; - int ret = -ENODEV; - - mutex_lock(&udc_lock); - list_for_each_entry(udc, &udc_list, list) { - ret = strcmp(name, dev_name(&udc->dev)); - if (!ret) - break; - } - if (ret) { - ret = -ENODEV; - goto out; - } - if (udc->driver) { - ret = -EBUSY; - goto out; - } - ret = udc_bind_to_driver(udc, driver); -out: - mutex_unlock(&udc_lock); - return ret; -} -EXPORT_SYMBOL_GPL(usb_udc_attach_driver); - int usb_gadget_probe_driver(struct usb_gadget_driver *driver) { struct usb_udc *udc = NULL; - int ret; + int ret = -ENODEV; if (!driver || !driver->bind || !driver->setup) return -EINVAL; mutex_lock(&udc_lock); - list_for_each_entry(udc, &udc_list, list) { - /* For now we take the first one */ - if (!udc->driver) + if (driver->udc_name) { + list_for_each_entry(udc, &udc_list, list) { + ret = strcmp(driver->udc_name, dev_name(&udc->dev)); + if (!ret) + break; + } + if (!ret && !udc->driver) goto found; + } else { + list_for_each_entry(udc, &udc_list, list) { + /* For now we take the first one */ + if (!udc->driver) + goto found; + } } - pr_debug("couldn't find an available UDC\n"); + list_add_tail(&driver->pending, &gadget_driver_pending_list); + pr_info("udc-core: couldn't find an available UDC - added [%s] to list of pending drivers\n", + driver->function); mutex_unlock(&udc_lock); - return -ENODEV; + return 0; found: ret = udc_bind_to_driver(udc, driver); mutex_unlock(&udc_lock); @@ -589,6 +596,10 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) break; } + if (ret) { + list_del(&driver->pending); + ret = 0; + } mutex_unlock(&udc_lock); return ret; } |
