#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_param(qlen, 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");
/* Thanks to Grey Innovation for donating this product ID.
*
#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
-
-/* 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
+#define STRING_MANUFACTURER_IDX 0
+#define STRING_PRODUCT_IDX 1
+#define STRING_DESCRIPTION_IDX 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,
-};
-
-/* 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_string strings_dev[] = {
+ [STRING_MANUFACTURER_IDX].s = "Grey Innovation",
+ [STRING_PRODUCT_IDX].s = "MIDI Gadget",
+ [STRING_DESCRIPTION_IDX].s = "MIDI",
+ { } /* 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 {
- dev->config = number;
- INFO(dev, "%s speed\n", usb_speed_string(gadget->speed));
- }
- return result;
-}
-
-
-static void gmidi_setup_complete(struct usb_ep *ep, struct usb_request *req)
+static int __exit midi_unbind(struct usb_composite_dev *dev)
{
- 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)
-{
- 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, 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);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff