diff options
Diffstat (limited to 'drivers/usb/gadget/gmidi.c')
| -rw-r--r-- | drivers/usb/gadget/gmidi.c | 1293 |
1 files changed, 89 insertions, 1204 deletions
diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c index 8b9220e128a7..681bd038b1d8 100644 --- a/drivers/usb/gadget/gmidi.c +++ b/drivers/usb/gadget/gmidi.c @@ -23,6 +23,7 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/utsname.h> +#include <linux/module.h> #include <linux/device.h> #include <sound/core.h> @@ -36,134 +37,43 @@ #include "gadget_chips.h" - -/* - * Kbuild is not very cooperative with respect to linking separately - * compiled library objects into one module. So for now we won't use - * separate compilation ... ensuring init/exit sections work to shrink - * the runtime footprint, and giving us at least some parts of what - * a "gcc --combine ... part1.c part2.c part3.c ... " build would. - */ +#include "composite.c" #include "usbstring.c" #include "config.c" #include "epautoconf.c" +#include "f_midi.c" /*-------------------------------------------------------------------------*/ - MODULE_AUTHOR("Ben Williamson"); MODULE_LICENSE("GPL v2"); -#define DRIVER_VERSION "25 Jul 2006" - static const char shortname[] = "g_midi"; static const char longname[] = "MIDI Gadget"; static int index = SNDRV_DEFAULT_IDX1; -static char *id = SNDRV_DEFAULT_STR1; - -module_param(index, int, 0444); +module_param(index, int, S_IRUGO); MODULE_PARM_DESC(index, "Index value for the USB MIDI Gadget adapter."); -module_param(id, charp, 0444); -MODULE_PARM_DESC(id, "ID string for the USB MIDI Gadget adapter."); - -/* Some systems will want different product identifiers published in the - * device descriptor, either numbers or strings or both. These string - * parameters are in UTF-8 (superset of ASCII's 7 bit characters). - */ - -static ushort idVendor; -module_param(idVendor, ushort, S_IRUGO); -MODULE_PARM_DESC(idVendor, "USB Vendor ID"); - -static ushort idProduct; -module_param(idProduct, ushort, S_IRUGO); -MODULE_PARM_DESC(idProduct, "USB Product ID"); - -static ushort bcdDevice; -module_param(bcdDevice, ushort, S_IRUGO); -MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); - -static char *iManufacturer; -module_param(iManufacturer, charp, S_IRUGO); -MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); - -static char *iProduct; -module_param(iProduct, charp, S_IRUGO); -MODULE_PARM_DESC(iProduct, "USB Product string"); - -static char *iSerialNumber; -module_param(iSerialNumber, charp, S_IRUGO); -MODULE_PARM_DESC(iSerialNumber, "SerialNumber"); - -/* - * this version autoconfigures as much as possible, - * which is reasonable for most "bulk-only" drivers. - */ -static const char *EP_IN_NAME; -static const char *EP_OUT_NAME; +static char *id = SNDRV_DEFAULT_STR1; +module_param(id, charp, S_IRUGO); +MODULE_PARM_DESC(id, "ID string for the USB MIDI Gadget adapter."); -/* big enough to hold our biggest descriptor */ -#define USB_BUFSIZ 256 - - -/* This is a gadget, and the IN/OUT naming is from the host's perspective. - USB -> OUT endpoint -> rawmidi - USB <- IN endpoint <- rawmidi */ -struct gmidi_in_port { - struct gmidi_device* dev; - int active; - uint8_t cable; /* cable number << 4 */ - uint8_t state; -#define STATE_UNKNOWN 0 -#define STATE_1PARAM 1 -#define STATE_2PARAM_1 2 -#define STATE_2PARAM_2 3 -#define STATE_SYSEX_0 4 -#define STATE_SYSEX_1 5 -#define STATE_SYSEX_2 6 - uint8_t data[2]; -}; - -struct gmidi_device { - spinlock_t lock; - struct usb_gadget *gadget; - struct usb_request *req; /* for control responses */ - u8 config; - struct usb_ep *in_ep, *out_ep; - struct snd_card *card; - struct snd_rawmidi *rmidi; - struct snd_rawmidi_substream *in_substream; - struct snd_rawmidi_substream *out_substream; - - /* For the moment we only support one port in - each direction, but in_port is kept as a - separate struct so we can have more later. */ - struct gmidi_in_port in_port; - unsigned long out_triggered; - struct tasklet_struct tasklet; -}; - -static void gmidi_transmit(struct gmidi_device* dev, struct usb_request* req); - - -#define DBG(d, fmt, args...) \ - dev_dbg(&(d)->gadget->dev , fmt , ## args) -#define VDBG(d, fmt, args...) \ - dev_vdbg(&(d)->gadget->dev , fmt , ## args) -#define ERROR(d, fmt, args...) \ - dev_err(&(d)->gadget->dev , fmt , ## args) -#define INFO(d, fmt, args...) \ - dev_info(&(d)->gadget->dev , fmt , ## args) - - -static unsigned buflen = 256; -static unsigned qlen = 32; - +static unsigned int buflen = 256; module_param(buflen, uint, S_IRUGO); +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"); +static unsigned int in_ports = 1; +module_param(in_ports, uint, S_IRUGO); +MODULE_PARM_DESC(in_ports, "Number of MIDI input ports"); + +static unsigned int out_ports = 1; +module_param(out_ports, uint, S_IRUGO); +MODULE_PARM_DESC(out_ports, "Number of MIDI output ports"); /* Thanks to Grey Innovation for donating this product ID. * @@ -173,1149 +83,124 @@ module_param(qlen, uint, S_IRUGO); #define DRIVER_VENDOR_NUM 0x17b3 /* Grey Innovation */ #define DRIVER_PRODUCT_NUM 0x0004 /* Linux-USB "MIDI Gadget" */ +/* string IDs are assigned dynamically */ -/* - * DESCRIPTORS ... most are static, but strings and (full) - * configuration descriptors are built on demand. - */ - -#define STRING_MANUFACTURER 25 -#define STRING_PRODUCT 42 -#define STRING_SERIAL 101 -#define STRING_MIDI_GADGET 250 +#define STRING_MANUFACTURER_IDX 0 +#define STRING_PRODUCT_IDX 1 +#define STRING_DESCRIPTION_IDX 2 -/* We only have the one configuration, it's number 1. */ -#define GMIDI_CONFIG 1 - -/* We have two interfaces- AudioControl and MIDIStreaming */ -#define GMIDI_AC_INTERFACE 0 -#define GMIDI_MS_INTERFACE 1 -#define GMIDI_NUM_INTERFACES 2 - -DECLARE_UAC_AC_HEADER_DESCRIPTOR(1); -DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(1); -DECLARE_USB_MS_ENDPOINT_DESCRIPTOR(1); - -/* B.1 Device Descriptor */ static struct usb_device_descriptor device_desc = { .bLength = USB_DT_DEVICE_SIZE, .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = cpu_to_le16(0x0200), + .bcdUSB = __constant_cpu_to_le16(0x0200), .bDeviceClass = USB_CLASS_PER_INTERFACE, - .idVendor = cpu_to_le16(DRIVER_VENDOR_NUM), - .idProduct = cpu_to_le16(DRIVER_PRODUCT_NUM), - .iManufacturer = STRING_MANUFACTURER, - .iProduct = STRING_PRODUCT, + .idVendor = __constant_cpu_to_le16(DRIVER_VENDOR_NUM), + .idProduct = __constant_cpu_to_le16(DRIVER_PRODUCT_NUM), + /* .iManufacturer = DYNAMIC */ + /* .iProduct = DYNAMIC */ .bNumConfigurations = 1, }; -/* B.2 Configuration Descriptor */ -static struct usb_config_descriptor config_desc = { - .bLength = USB_DT_CONFIG_SIZE, - .bDescriptorType = USB_DT_CONFIG, - /* compute wTotalLength on the fly */ - .bNumInterfaces = GMIDI_NUM_INTERFACES, - .bConfigurationValue = GMIDI_CONFIG, - .iConfiguration = STRING_MIDI_GADGET, - /* - * FIXME: When embedding this driver in a device, - * these need to be set to reflect the actual - * power properties of the device. Is it selfpowered? - */ - .bmAttributes = USB_CONFIG_ATT_ONE, - .bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2, -}; - -/* B.3.1 Standard AC Interface Descriptor */ -static const struct usb_interface_descriptor ac_interface_desc = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = GMIDI_AC_INTERFACE, - .bNumEndpoints = 0, - .bInterfaceClass = USB_CLASS_AUDIO, - .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, - .iInterface = STRING_MIDI_GADGET, -}; - -/* B.3.2 Class-Specific AC Interface Descriptor */ -static const struct uac1_ac_header_descriptor_1 ac_header_desc = { - .bLength = UAC_DT_AC_HEADER_SIZE(1), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = USB_MS_HEADER, - .bcdADC = cpu_to_le16(0x0100), - .wTotalLength = cpu_to_le16(UAC_DT_AC_HEADER_SIZE(1)), - .bInCollection = 1, - .baInterfaceNr = { - [0] = GMIDI_MS_INTERFACE, - } -}; - -/* B.4.1 Standard MS Interface Descriptor */ -static const struct usb_interface_descriptor ms_interface_desc = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = GMIDI_MS_INTERFACE, - .bNumEndpoints = 2, - .bInterfaceClass = USB_CLASS_AUDIO, - .bInterfaceSubClass = USB_SUBCLASS_MIDISTREAMING, - .iInterface = STRING_MIDI_GADGET, +static struct usb_string strings_dev[] = { + [STRING_MANUFACTURER_IDX].s = "Grey Innovation", + [STRING_PRODUCT_IDX].s = "MIDI Gadget", + [STRING_DESCRIPTION_IDX].s = "MIDI", + { } /* end of list */ }; -/* B.4.2 Class-Specific MS Interface Descriptor */ -static const struct usb_ms_header_descriptor ms_header_desc = { - .bLength = USB_DT_MS_HEADER_SIZE, - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = USB_MS_HEADER, - .bcdMSC = cpu_to_le16(0x0100), - .wTotalLength = cpu_to_le16(USB_DT_MS_HEADER_SIZE - + 2*USB_DT_MIDI_IN_SIZE - + 2*USB_DT_MIDI_OUT_SIZE(1)), -}; - -#define JACK_IN_EMB 1 -#define JACK_IN_EXT 2 -#define JACK_OUT_EMB 3 -#define JACK_OUT_EXT 4 - -/* B.4.3 MIDI IN Jack Descriptors */ -static const struct usb_midi_in_jack_descriptor jack_in_emb_desc = { - .bLength = USB_DT_MIDI_IN_SIZE, - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = USB_MS_MIDI_IN_JACK, - .bJackType = USB_MS_EMBEDDED, - .bJackID = JACK_IN_EMB, -}; - -static const struct usb_midi_in_jack_descriptor jack_in_ext_desc = { - .bLength = USB_DT_MIDI_IN_SIZE, - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = USB_MS_MIDI_IN_JACK, - .bJackType = USB_MS_EXTERNAL, - .bJackID = JACK_IN_EXT, -}; - -/* B.4.4 MIDI OUT Jack Descriptors */ -static const struct usb_midi_out_jack_descriptor_1 jack_out_emb_desc = { - .bLength = USB_DT_MIDI_OUT_SIZE(1), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = USB_MS_MIDI_OUT_JACK, - .bJackType = USB_MS_EMBEDDED, - .bJackID = JACK_OUT_EMB, - .bNrInputPins = 1, - .pins = { - [0] = { - .baSourceID = JACK_IN_EXT, - .baSourcePin = 1, - } - } -}; - -static const struct usb_midi_out_jack_descriptor_1 jack_out_ext_desc = { - .bLength = USB_DT_MIDI_OUT_SIZE(1), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = USB_MS_MIDI_OUT_JACK, - .bJackType = USB_MS_EXTERNAL, - .bJackID = JACK_OUT_EXT, - .bNrInputPins = 1, - .pins = { - [0] = { - .baSourceID = JACK_IN_EMB, - .baSourcePin = 1, - } - } -}; - -/* B.5.1 Standard Bulk OUT Endpoint Descriptor */ -static struct usb_endpoint_descriptor bulk_out_desc = { - .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = USB_DIR_OUT, - .bmAttributes = USB_ENDPOINT_XFER_BULK, -}; - -/* B.5.2 Class-specific MS Bulk OUT Endpoint Descriptor */ -static const struct usb_ms_endpoint_descriptor_1 ms_out_desc = { - .bLength = USB_DT_MS_ENDPOINT_SIZE(1), - .bDescriptorType = USB_DT_CS_ENDPOINT, - .bDescriptorSubtype = USB_MS_GENERAL, - .bNumEmbMIDIJack = 1, - .baAssocJackID = { - [0] = JACK_IN_EMB, - } -}; - -/* B.6.1 Standard Bulk IN Endpoint Descriptor */ -static struct usb_endpoint_descriptor bulk_in_desc = { - .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = USB_DIR_IN, - .bmAttributes = USB_ENDPOINT_XFER_BULK, -}; - -/* B.6.2 Class-specific MS Bulk IN Endpoint Descriptor */ -static const struct usb_ms_endpoint_descriptor_1 ms_in_desc = { - .bLength = USB_DT_MS_ENDPOINT_SIZE(1), - .bDescriptorType = USB_DT_CS_ENDPOINT, - .bDescriptorSubtype = USB_MS_GENERAL, - .bNumEmbMIDIJack = 1, - .baAssocJackID = { - [0] = JACK_OUT_EMB, - } -}; - -static const struct usb_descriptor_header *gmidi_function [] = { - (struct usb_descriptor_header *)&ac_interface_desc, - (struct usb_descriptor_header *)&ac_header_desc, - (struct usb_descriptor_header *)&ms_interface_desc, - - (struct usb_descriptor_header *)&ms_header_desc, - (struct usb_descriptor_header *)&jack_in_emb_desc, - (struct usb_descriptor_header *)&jack_in_ext_desc, - (struct usb_descriptor_header *)&jack_out_emb_desc, - (struct usb_descriptor_header *)&jack_out_ext_desc, - /* If you add more jacks, update ms_header_desc.wTotalLength */ - - (struct usb_descriptor_header *)&bulk_out_desc, - (struct usb_descriptor_header *)&ms_out_desc, - (struct usb_descriptor_header *)&bulk_in_desc, - (struct usb_descriptor_header *)&ms_in_desc, - NULL, -}; - -static char manufacturer[50]; -static char product_desc[40] = "MIDI Gadget"; -static char serial_number[20]; - -/* static strings, in UTF-8 */ -static struct usb_string strings [] = { - { STRING_MANUFACTURER, manufacturer, }, - { STRING_PRODUCT, product_desc, }, - { STRING_SERIAL, serial_number, }, - { STRING_MIDI_GADGET, longname, }, - { } /* end of list */ -}; - -static struct usb_gadget_strings stringtab = { +static struct usb_gadget_strings stringtab_dev = { .language = 0x0409, /* en-us */ - .strings = strings, + .strings = strings_dev, }; -static int config_buf(struct usb_gadget *gadget, - u8 *buf, u8 type, unsigned index) -{ - int len; - - /* only one configuration */ - if (index != 0) { - return -EINVAL; - } - len = usb_gadget_config_buf(&config_desc, - buf, USB_BUFSIZ, gmidi_function); - if (len < 0) { - return len; - } - ((struct usb_config_descriptor *)buf)->bDescriptorType = type; - return len; -} - -static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) -{ - struct usb_request *req; - - req = usb_ep_alloc_request(ep, GFP_ATOMIC); - if (req) { - req->length = length; - req->buf = kmalloc(length, GFP_ATOMIC); - if (!req->buf) { - usb_ep_free_request(ep, req); - req = NULL; - } - } - return req; -} - -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 gmidi_cin_length[] = { - 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1 +static struct usb_gadget_strings *dev_strings[] = { + &stringtab_dev, + NULL, }; -/* - * Receives a chunk of MIDI data. - */ -static void gmidi_read_data(struct usb_ep *ep, int cable, - uint8_t *data, int length) -{ - struct gmidi_device *dev = ep->driver_data; - /* cable is ignored, because for now we only have one. */ - - if (!dev->out_substream) { - /* Nobody is listening - throw it on the floor. */ - return; - } - if (!test_bit(dev->out_substream->number, &dev->out_triggered)) { - return; - } - snd_rawmidi_receive(dev->out_substream, data, length); -} - -static void gmidi_handle_out_data(struct usb_ep *ep, struct usb_request *req) -{ - unsigned i; - u8 *buf = req->buf; - - for (i = 0; i + 3 < req->actual; i += 4) { - if (buf[i] != 0) { - int cable = buf[i] >> 4; - int length = gmidi_cin_length[buf[i] & 0x0f]; - gmidi_read_data(ep, cable, &buf[i + 1], length); - } - } -} - -static void gmidi_complete(struct usb_ep *ep, struct usb_request *req) -{ - struct gmidi_device *dev = ep->driver_data; - int status = req->status; - - switch (status) { - case 0: /* normal completion */ - if (ep == dev->out_ep) { - /* we received stuff. - req is queued again, below */ - gmidi_handle_out_data(ep, req); - } else if (ep == dev->in_ep) { - /* our transmit completed. - see if there's more to go. - gmidi_transmit eats req, don't queue it again. */ - gmidi_transmit(dev, req); - return; - } - break; - - /* this endpoint is normally active while we're configured */ - case -ECONNABORTED: /* hardware forced ep reset */ - case -ECONNRESET: /* request dequeued */ - case -ESHUTDOWN: /* disconnect from host */ - VDBG(dev, "%s gone (%d), %d/%d\n", ep->name, status, - req->actual, req->length); - if (ep == dev->out_ep) { - gmidi_handle_out_data(ep, req); - } - free_ep_req(ep, req); - return; - - case -EOVERFLOW: /* buffer overrun on read means that - * we didn't provide a big enough - * buffer. - */ - default: - DBG(dev, "%s complete --> %d, %d/%d\n", ep->name, - status, req->actual, req->length); - break; - case -EREMOTEIO: /* short read */ - break; - } - - status = usb_ep_queue(ep, req, GFP_ATOMIC); - if (status) { - ERROR(dev, "kill %s: resubmit %d bytes --> %d\n", - ep->name, req->length, status); - usb_ep_set_halt(ep); - /* FIXME recover later ... somehow */ - } -} - -static int set_gmidi_config(struct gmidi_device *dev, gfp_t gfp_flags) -{ - int err = 0; - struct usb_request *req; - struct usb_ep *ep; - unsigned i; - - dev->in_ep->desc = &bulk_in_desc; - err = usb_ep_enable(dev->in_ep); - if (err) { - ERROR(dev, "can't start %s: %d\n", dev->in_ep->name, err); - goto fail; - } - dev->in_ep->driver_data = dev; - - dev->out_ep->desc = &bulk_out_desc; - err = usb_ep_enable(dev->out_ep); - if (err) { - ERROR(dev, "can't start %s: %d\n", dev->out_ep->name, err); - goto fail; - } - dev->out_ep->driver_data = dev; - - /* allocate a bunch of read buffers and queue them all at once. */ - ep = dev->out_ep; - for (i = 0; i < qlen && err == 0; i++) { - req = alloc_ep_req(ep, buflen); - if (req) { - req->complete = gmidi_complete; - err = usb_ep_queue(ep, req, GFP_ATOMIC); - if (err) { - DBG(dev, "%s queue req: %d\n", ep->name, err); - } - } else { - err = -ENOMEM; - } - } -fail: - /* caller is responsible for cleanup on error */ - return err; -} - - -static void gmidi_reset_config(struct gmidi_device *dev) -{ - if (dev->config == 0) { - return; - } - - DBG(dev, "reset config\n"); - - /* just disable endpoints, forcing completion of pending i/o. - * all our completion handlers free their requests in this case. - */ - usb_ep_disable(dev->in_ep); - usb_ep_disable(dev->out_ep); - dev->config = 0; -} - -/* change our operational config. this code must agree with the code - * that returns config descriptors, and altsetting code. - * - * it's also responsible for power management interactions. some - * configurations might not work with our current power sources. - * - * note that some device controller hardware will constrain what this - * code can do, perhaps by disallowing more than one configuration or - * by limiting configuration choices (like the pxa2xx). - */ -static int -gmidi_set_config(struct gmidi_device *dev, unsigned number, gfp_t gfp_flags) -{ - int result = 0; - struct usb_gadget *gadget = dev->gadget; - -#if 0 - /* FIXME */ - /* Hacking this bit out fixes a bug where on receipt of two - USB_REQ_SET_CONFIGURATION messages, we end up with no - buffered OUT requests waiting for data. This is clearly - hiding a bug elsewhere, because if the config didn't - change then we really shouldn't do anything. */ - /* Having said that, when we do "change" from config 1 - to config 1, we at least gmidi_reset_config() which - clears out any requests on endpoints, so it's not like - we leak or anything. */ - if (number == dev->config) { - return 0; - } -#endif - - gmidi_reset_config(dev); - - switch (number) { - case GMIDI_CONFIG: - result = set_gmidi_config(dev, gfp_flags); - break; - default: - result = -EINVAL; - /* FALL THROUGH */ - case 0: - return result; - } - - if (!result && (!dev->in_ep || !dev->out_ep)) { - result = -ENODEV; - } - if (result) { - gmidi_reset_config(dev); - } else { - char *speed; - - switch (gadget->speed) { - case USB_SPEED_LOW: speed = "low"; break; - case USB_SPEED_FULL: speed = "full"; break; - case USB_SPEED_HIGH: speed = "high"; break; - default: speed = "?"; break; - } - - dev->config = number; - INFO(dev, "%s speed\n", speed); - } - return result; -} - - -static void gmidi_setup_complete(struct usb_ep *ep, struct usb_request *req) -{ - if (req->status || req->actual != req->length) { - DBG((struct gmidi_device *) ep->driver_data, - "setup complete --> %d, %d/%d\n", - req->status, req->actual, req->length); - } -} - -/* - * The setup() callback implements all the ep0 functionality that's - * not handled lower down, in hardware or the hardware driver (like - * device and endpoint feature flags, and their status). It's all - * housekeeping for the gadget function we're implementing. Most of - * the work is in config-specific setup. - */ -static int gmidi_setup(struct usb_gadget *gadget, - const struct usb_ctrlrequest *ctrl) -{ - struct gmidi_device *dev = get_gadget_data(gadget); - struct usb_request *req = dev->req; - int value = -EOPNOTSUPP; - u16 w_index = le16_to_cpu(ctrl->wIndex); - u16 w_value = le16_to_cpu(ctrl->wValue); - u16 w_length = le16_to_cpu(ctrl->wLength); - - /* usually this stores reply data in the pre-allocated ep0 buffer, - * but config change events will reconfigure hardware. - */ - req->zero = 0; - switch (ctrl->bRequest) { - - case USB_REQ_GET_DESCRIPTOR: - if (ctrl->bRequestType != USB_DIR_IN) { - goto unknown; - } - switch (w_value >> 8) { - - case USB_DT_DEVICE: - device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; - value = min(w_length, (u16) sizeof(device_desc)); - memcpy(req->buf, &device_desc, value); - break; - case USB_DT_CONFIG: - value = config_buf(gadget, req->buf, - w_value >> 8, - w_value & 0xff); - if (value >= 0) { - value = min(w_length, (u16)value); - } - break; - - case USB_DT_STRING: - /* wIndex == language code. - * this driver only handles one language, you can - * add string tables for other languages, using - * any UTF-8 characters - */ - value = usb_gadget_get_string(&stringtab, - w_value & 0xff, req->buf); - if (value >= 0) { - value = min(w_length, (u16)value); - } - break; - } - break; - - /* currently two configs, two speeds */ - case USB_REQ_SET_CONFIGURATION: - if (ctrl->bRequestType != 0) { - goto unknown; - } - if (gadget->a_hnp_support) { - DBG(dev, "HNP available\n"); - } else if (gadget->a_alt_hnp_support) { - DBG(dev, "HNP needs a different root port\n"); - } else { - VDBG(dev, "HNP inactive\n"); - } - spin_lock(&dev->lock); - value = gmidi_set_config(dev, w_value, GFP_ATOMIC); - spin_unlock(&dev->lock); - break; - case USB_REQ_GET_CONFIGURATION: - if (ctrl->bRequestType != USB_DIR_IN) { - goto unknown; - } - *(u8 *)req->buf = dev->config; - value = min(w_length, (u16)1); - break; - - /* until we add altsetting support, or other interfaces, - * only 0/0 are possible. pxa2xx only supports 0/0 (poorly) - * and already killed pending endpoint I/O. - */ - case USB_REQ_SET_INTERFACE: - if (ctrl->bRequestType != USB_RECIP_INTERFACE) { - goto unknown; - } - spin_lock(&dev->lock); - if (dev->config && w_index < GMIDI_NUM_INTERFACES - && w_value == 0) - { - u8 config = dev->config; - - /* resets interface configuration, forgets about - * previous transaction state (queued bufs, etc) - * and re-inits endpoint state (toggle etc) - * no response queued, just zero status == success. - * if we had more than one interface we couldn't - * use this "reset the config" shortcut. - */ - gmidi_reset_config(dev); - gmidi_set_config(dev, config, GFP_ATOMIC); - value = 0; - } - spin_unlock(&dev->lock); - break; - case USB_REQ_GET_INTERFACE: - if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) { - goto unknown; - } - if (!dev->config) { - break; - } - if (w_index >= GMIDI_NUM_INTERFACES) { - value = -EDOM; - break; - } - *(u8 *)req->buf = 0; - value = min(w_length, (u16)1); - break; - - default: -unknown: - VDBG(dev, "unknown control req%02x.%02x v%04x i%04x l%d\n", - ctrl->bRequestType, ctrl->bRequest, - w_value, w_index, w_length); - } - - /* respond with data transfer before status phase? */ - if (value >= 0) { - req->length = value; - req->zero = value < w_length; - value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); - if (value < 0) { - DBG(dev, "ep_queue --> %d\n", value); - req->status = 0; - gmidi_setup_complete(gadget->ep0, req); - } - } - - /* device either stalls (value < 0) or reports success */ - return value; -} - -static void gmidi_disconnect(struct usb_gadget *gadget) -{ - struct gmidi_device *dev = get_gadget_data(gadget); - unsigned long flags; - - spin_lock_irqsave(&dev->lock, flags); - gmidi_reset_config(dev); - - /* a more significant application might have some non-usb - * activities to quiesce here, saving resources like power - * or pushing the notification up a network stack. - */ - spin_unlock_irqrestore(&dev->lock, flags); - - /* next we may get setup() calls to enumerate new connections; - * or an unbind() during shutdown (including removing module). - */ -} - -static void /* __init_or_exit */ gmidi_unbind(struct usb_gadget *gadget) -{ - struct gmidi_device *dev = get_gadget_data(gadget); - struct snd_card *card; - - DBG(dev, "unbind\n"); - - card = dev->card; - dev->card = NULL; - if (card) { - snd_card_free(card); - } - - /* we've already been disconnected ... no i/o is active */ - if (dev->req) { - dev->req->length = USB_BUFSIZ; - free_ep_req(gadget->ep0, dev->req); - } - kfree(dev); - set_gadget_data(gadget, NULL); -} - -static int gmidi_snd_free(struct snd_device *device) +static int __exit midi_unbind(struct usb_composite_dev *dev) { return 0; } -static void gmidi_transmit_packet(struct usb_request *req, uint8_t p0, - uint8_t p1, uint8_t p2, uint8_t p3) -{ - unsigned length = req->length; - u8 *buf = (u8 *)req->buf + length; - - buf[0] = p0; - buf[1] = p1; - buf[2] = p2; - buf[3] = p3; - req->length = length + 4; -} - -/* - * Converts MIDI commands to USB MIDI packets. - */ -static void gmidi_transmit_byte(struct usb_request *req, - struct gmidi_in_port *port, uint8_t b) -{ - uint8_t p0 = port->cable; - - if (b >= 0xf8) { - gmidi_transmit_packet(req, p0 | 0x0f, b, 0, 0); - } else if (b >= 0xf0) { - switch (b) { - case 0xf0: - port->data[0] = b; - port->state = STATE_SYSEX_1; - break; - case 0xf1: - case 0xf3: - port->data[0] = b; - port->state = STATE_1PARAM; - break; - case 0xf2: - port->data[0] = b; - port->state = STATE_2PARAM_1; - break; - case 0xf4: - case 0xf5: - port->state = STATE_UNKNOWN; - break; - case 0xf6: - gmidi_transmit_packet(req, p0 | 0x05, 0xf6, 0, 0); - port->state = STATE_UNKNOWN; - break; - case 0xf7: - switch (port->state) { - case STATE_SYSEX_0: - gmidi_transmit_packet(req, - p0 | 0x05, 0xf7, 0, 0); - break; - case STATE_SYSEX_1: - gmidi_transmit_packet(req, - p0 | 0x06, port->data[0], 0xf7, 0); - break; - case STATE_SYSEX_2: - gmidi_transmit_packet(req, - p0 | 0x07, port->data[0], - port->data[1], 0xf7); - break; - } - port->state = STATE_UNKNOWN; - break; - } - } else if (b >= 0x80) { - port->data[0] = b; - if (b >= 0xc0 && b <= 0xdf) - port->state = STATE_1PARAM; - else - port->state = STATE_2PARAM_1; - } else { /* b < 0x80 */ - switch (port->state) { - case STATE_1PARAM: - if (port->data[0] < 0xf0) { - p0 |= port->data[0] >> 4; - } else { - p0 |= 0x02; - port->state = STATE_UNKNOWN; - } - gmidi_transmit_packet(req, p0, port->data[0], b, 0); - break; - case STATE_2PARAM_1: - port->data[1] = b; - port->state = STATE_2PARAM_2; - break; - case STATE_2PARAM_2: - if (port->data[0] < 0xf0) { - p0 |= port->data[0] >> 4; - port->state = STATE_2PARAM_1; - } else { - p0 |= 0x03; - port->state = STATE_UNKNOWN; - } - gmidi_transmit_packet(req, - p0, port->data[0], port->data[1], b); - break; - case STATE_SYSEX_0: - port->data[0] = b; - port->state = STATE_SYSEX_1; - break; - case STATE_SYSEX_1: - port->data[1] = b; - port->state = STATE_SYSEX_2; - break; - case STATE_SYSEX_2: - gmidi_transmit_packet(req, - p0 | 0x04, port->data[0], port->data[1], b); - port->state = STATE_SYSEX_0; - break; - } - } -} - -static void gmidi_transmit(struct gmidi_device *dev, struct usb_request *req) -{ - struct usb_ep *ep = dev->in_ep; - struct gmidi_in_port *port = &dev->in_port; - - if (!ep) { - return; - } - if (!req) { - req = alloc_ep_req(ep, buflen); - } - if (!req) { - ERROR(dev, "gmidi_transmit: alloc_ep_request failed\n"); - return; - } - req->length = 0; - req->complete = gmidi_complete; - - if (port->active) { - while (req->length + 3 < buflen) { - uint8_t b; - if (snd_rawmidi_transmit(dev->in_substream, &b, 1) - != 1) - { - port->active = 0; - break; - } - gmidi_transmit_byte(req, port, b); - } - } - if (req->length > 0) { - usb_ep_queue(ep, req, GFP_ATOMIC); - } else { - free_ep_req(ep, req); - } -} - -static void gmidi_in_tasklet(unsigned long data) -{ - struct gmidi_device *dev = (struct gmidi_device *)data; - - gmidi_transmit(dev, NULL); -} - -static int gmidi_in_open(struct snd_rawmidi_substream *substream) -{ - struct gmidi_device *dev = substream->rmidi->private_data; - - VDBG(dev, "gmidi_in_open\n"); - dev->in_substream = substream; - dev->in_port.state = STATE_UNKNOWN; - return 0; -} - -static int gmidi_in_close(struct snd_rawmidi_substream *substream) -{ - struct gmidi_device *dev = substream->rmidi->private_data; - - VDBG(dev, "gmidi_in_close\n"); - return 0; -} - -static void gmidi_in_trigger(struct snd_rawmidi_substream *substream, int up) -{ - struct gmidi_device *dev = substream->rmidi->private_data; - - VDBG(dev, "gmidi_in_trigger %d\n", up); - dev->in_port.active = up; - if (up) { - tasklet_hi_schedule(&dev->tasklet); - } -} - -static int gmidi_out_open(struct snd_rawmidi_substream *substream) -{ - struct gmidi_device *dev = substream->rmidi->private_data; - - VDBG(dev, "gmidi_out_open\n"); - dev->out_substream = substream; - return 0; -} - -static int gmidi_out_close(struct snd_rawmidi_substream *substream) -{ - struct gmidi_device *dev = substream->rmidi->private_data; - - VDBG(dev, "gmidi_out_close\n"); - return 0; -} - -static void gmidi_out_trigger(struct snd_rawmidi_substream *substream, int up) -{ - struct gmidi_device *dev = substream->rmidi->private_data; - - VDBG(dev, "gmidi_out_trigger %d\n", up); - if (up) { - set_bit(substream->number, &dev->out_triggered); - } else { - clear_bit(substream->number, &dev->out_triggered); - } -} - -static struct snd_rawmidi_ops gmidi_in_ops = { - .open = gmidi_in_open, - .close = gmidi_in_close, - .trigger = gmidi_in_trigger, +static struct usb_configuration midi_config = { + .label = "MIDI Gadget", + .bConfigurationValue = 1, + /* .iConfiguration = DYNAMIC */ + .bmAttributes = USB_CONFIG_ATT_ONE, + .bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2, }; -static struct snd_rawmidi_ops gmidi_out_ops = { - .open = gmidi_out_open, - .close = gmidi_out_close, - .trigger = gmidi_out_trigger -}; - -/* register as a sound "card" */ -static int gmidi_register_card(struct gmidi_device *dev) +static int __init midi_bind_config(struct usb_configuration *c) { - struct snd_card *card; - struct snd_rawmidi *rmidi; - int err; - int out_ports = 1; - int in_ports = 1; - static struct snd_device_ops ops = { - .dev_free = gmidi_snd_free, - }; - - err = snd_card_create(index, id, THIS_MODULE, 0, &card); - if (err < 0) { - ERROR(dev, "snd_card_create failed\n"); - goto fail; - } - dev->card = card; - - err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, dev, &ops); - if (err < 0) { - ERROR(dev, "snd_device_new failed: error %d\n", err); - goto fail; - } - - strcpy(card->driver, longname); - strcpy(card->longname, longname); - strcpy(card->shortname, shortname); - - /* Set up rawmidi */ - dev->in_port.dev = dev; - dev->in_port.active = 0; - snd_component_add(card, "MIDI"); - err = snd_rawmidi_new(card, "USB MIDI Gadget", 0, - out_ports, in_ports, &rmidi); - if (err < 0) { - ERROR(dev, "snd_rawmidi_new failed: error %d\n", err); - goto fail; - } - dev->rmidi = rmidi; - strcpy(rmidi->name, card->shortname); - rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | - SNDRV_RAWMIDI_INFO_INPUT | - SNDRV_RAWMIDI_INFO_DUPLEX; - rmidi->private_data = dev; - - /* Yes, rawmidi OUTPUT = USB IN, and rawmidi INPUT = USB OUT. - It's an upside-down world being a gadget. */ - snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &gmidi_in_ops); - snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &gmidi_out_ops); - - snd_card_set_dev(card, &dev->gadget->dev); - - /* register it - we're ready to go */ - err = snd_card_register(card); - if (err < 0) { - ERROR(dev, "snd_card_register failed\n"); - goto fail; - } - - VDBG(dev, "gmidi_register_card finished ok\n"); - return 0; - -fail: - if (dev->card) { - snd_card_free(dev->card); - dev->card = NULL; - } - return err; + return f_midi_bind_config(c, index, id, + in_ports, out_ports, + buflen, qlen); } -/* - * Creates an output endpoint, and initializes output ports. - */ -static int __init gmidi_bind(struct usb_gadget *gadget) +static int __init midi_bind(struct usb_composite_dev *cdev) { - struct gmidi_device *dev; - struct usb_ep *in_ep, *out_ep; - int gcnum, err = 0; + struct usb_gadget *gadget = cdev->gadget; + int gcnum, status; - /* support optional vendor/distro customization */ - if (idVendor) { - if (!idProduct) { - pr_err("idVendor needs idProduct!\n"); - return -ENODEV; - } - device_desc.idVendor = cpu_to_le16(idVendor); - device_desc.idProduct = cpu_to_le16(idProduct); - if (bcdDevice) { - device_desc.bcdDevice = cpu_to_le16(bcdDevice); - } - } - if (iManufacturer) { - strlcpy(manufacturer, iManufacturer, sizeof(manufacturer)); - } else { - snprintf(manufacturer, sizeof(manufacturer), "%s %s with %s", - init_utsname()->sysname, init_utsname()->release, - gadget->name); - } - if (iProduct) { - strlcpy(product_desc, iProduct, sizeof(product_desc)); - } - if (iSerialNumber) { - device_desc.iSerialNumber = STRING_SERIAL, - strlcpy(serial_number, iSerialNumber, sizeof(serial_number)); - } + status = usb_string_id(cdev); + if (status < 0) + return status; + strings_dev[STRING_MANUFACTURER_IDX].id = status; + device_desc.iManufacturer = status; - /* Bulk-only drivers like this one SHOULD be able to - * autoconfigure on any sane usb controller driver, - * but there may also be important quirks to address. - */ - usb_ep_autoconfig_reset(gadget); - in_ep = usb_ep_autoconfig(gadget, &bulk_in_desc); - if (!in_ep) { -autoconf_fail: - pr_err("%s: can't autoconfigure on %s\n", - shortname, gadget->name); - return -ENODEV; - } - EP_IN_NAME = in_ep->name; - in_ep->driver_data = in_ep; /* claim */ + status = usb_string_id(cdev); + if (status < 0) + return status; + strings_dev[STRING_PRODUCT_IDX].id = status; + device_desc.iProduct = status; - out_ep = usb_ep_autoconfig(gadget, &bulk_out_desc); - if (!out_ep) { - goto autoconf_fail; - } - EP_OUT_NAME = out_ep->name; - out_ep->driver_data = out_ep; /* claim */ + /* config description */ + status = usb_string_id(cdev); + if (status < 0) + return status; + strings_dev[STRING_DESCRIPTION_IDX].id = status; + + midi_config.iConfiguration = status; gcnum = usb_gadget_controller_number(gadget); - if (gcnum >= 0) { - device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); - } else { + if (gcnum < 0) { /* gmidi is so simple (no altsettings) that * it SHOULD NOT have problems with bulk-capable hardware. * so warn about unrecognized controllers, don't panic. */ pr_warning("%s: controller '%s' not recognized\n", - shortname, gadget->name); + __func__, gadget->name); device_desc.bcdDevice = cpu_to_le16(0x9999); + } else { + device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); } + status = usb_add_config(cdev, &midi_config, midi_bind_config); + if (status < 0) + return status; - /* ok, we made sense of the hardware ... */ - dev = kzalloc(sizeof(*dev), GFP_KERNEL); - if (!dev) { - return -ENOMEM; - } - spin_lock_init(&dev->lock); - dev->gadget = gadget; - dev->in_ep = in_ep; - dev->out_ep = out_ep; - set_gadget_data(gadget, dev); - tasklet_init(&dev->tasklet, gmidi_in_tasklet, (unsigned long)dev); - - /* preallocate control response and buffer */ - dev->req = alloc_ep_req(gadget->ep0, USB_BUFSIZ); - if (!dev->req) { - err = -ENOMEM; - goto fail; - } - - dev->req->complete = gmidi_setup_complete; - - gadget->ep0->driver_data = dev; - - INFO(dev, "%s, version: " DRIVER_VERSION "\n", longname); - INFO(dev, "using %s, OUT %s IN %s\n", gadget->name, - EP_OUT_NAME, EP_IN_NAME); - - /* register as an ALSA sound card */ - err = gmidi_register_card(dev); - if (err < 0) { - goto fail; - } - - VDBG(dev, "gmidi_bind finished ok\n"); + pr_info("%s\n", longname); return 0; - -fail: - gmidi_unbind(gadget); - return err; -} - - -static void gmidi_suspend(struct usb_gadget *gadget) -{ - struct gmidi_device *dev = get_gadget_data(gadget); - - if (gadget->speed == USB_SPEED_UNKNOWN) { - return; - } - - DBG(dev, "suspend\n"); -} - -static void gmidi_resume(struct usb_gadget *gadget) -{ - struct gmidi_device *dev = get_gadget_data(gadget); - - DBG(dev, "resume\n"); } - -static struct usb_gadget_driver gmidi_driver = { - .speed = USB_SPEED_FULL, - .function = (char *)longname, - .unbind = gmidi_unbind, - - .setup = gmidi_setup, - .disconnect = gmidi_disconnect, - - .suspend = gmidi_suspend, - .resume = gmidi_resume, - - .driver = { - .name = (char *)shortname, - .owner = THIS_MODULE, - }, +static struct usb_composite_driver midi_driver = { + .name = (char *) longname, + .dev = &device_desc, + .strings = dev_strings, + .max_speed = USB_SPEED_HIGH, + .unbind = __exit_p(midi_unbind), }; -static int __init gmidi_init(void) +static int __init midi_init(void) { - return usb_gadget_probe_driver(&gmidi_driver, gmidi_bind); + return usb_composite_probe(&midi_driver, midi_bind); } -module_init(gmidi_init); +module_init(midi_init); -static void __exit gmidi_cleanup(void) +static void __exit midi_cleanup(void) { - usb_gadget_unregister_driver(&gmidi_driver); + usb_composite_unregister(&midi_driver); } -module_exit(gmidi_cleanup); +module_exit(midi_cleanup); |