1 files changed, 249 insertions, 0 deletions
diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
new file mode 100644
index 0000000000..4937ede0b5
--- /dev/null
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Tascam US-X2Y USB soundcards
+ *
+ * FPGA Loader + ALSA Startup
+ *
+ * Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.de>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <sound/core.h>
+#include <sound/memalloc.h>
+#include <sound/pcm.h>
+#include <sound/hwdep.h>
+#include "usx2y.h"
+#include "usbusx2y.h"
+#include "usX2Yhwdep.h"
+
+static vm_fault_t snd_us428ctls_vm_fault(struct vm_fault *vmf)
+{
+	unsigned long offset;
+	struct page *page;
+	void *vaddr;
+
+	snd_printdd("ENTER, start %lXh, pgoff %ld\n",
+		   vmf->vma->vm_start,
+		   vmf->pgoff);
+
+	offset = vmf->pgoff << PAGE_SHIFT;
+	vaddr = (char *)((struct usx2ydev *)vmf->vma->vm_private_data)->us428ctls_sharedmem + offset;
+	page = virt_to_page(vaddr);
+	get_page(page);
+	vmf->page = page;
+
+	snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",
+		    vaddr, page);
+
+	return 0;
+}
+
+static const struct vm_operations_struct us428ctls_vm_ops = {
+	.fault = snd_us428ctls_vm_fault,
+};
+
+static int snd_us428ctls_mmap(struct snd_hwdep *hw, struct file *filp, struct vm_area_struct *area)
+{
+	unsigned long	size = (unsigned long)(area->vm_end - area->vm_start);
+	struct usx2ydev	*us428 = hw->private_data;
+
+	// FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
+	// so as long as the device isn't fully initialised yet we return -EBUSY here.
+	if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))
+		return -EBUSY;
+
+	/* if userspace tries to mmap beyond end of our buffer, fail */
+	if (size > US428_SHAREDMEM_PAGES) {
+		snd_printd("%lu > %lu\n", size, (unsigned long)US428_SHAREDMEM_PAGES);
+		return -EINVAL;
+	}
+
+	area->vm_ops = &us428ctls_vm_ops;
+	vm_flags_set(area, VM_DONTEXPAND | VM_DONTDUMP);
+	area->vm_private_data = hw->private_data;
+	return 0;
+}
+
+static __poll_t snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)
+{
+	__poll_t	mask = 0;
+	struct usx2ydev	*us428 = hw->private_data;
+	struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;
+
+	if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
+		return EPOLLHUP;
+
+	poll_wait(file, &us428->us428ctls_wait_queue_head, wait);
+
+	if (shm && shm->ctl_snapshot_last != shm->ctl_snapshot_red)
+		mask |= EPOLLIN;
+
+	return mask;
+}
+
+
+static int snd_usx2y_hwdep_dsp_status(struct snd_hwdep *hw,
+				      struct snd_hwdep_dsp_status *info)
+{
+	static const char * const type_ids[USX2Y_TYPE_NUMS] = {
+		[USX2Y_TYPE_122] = "us122",
+		[USX2Y_TYPE_224] = "us224",
+		[USX2Y_TYPE_428] = "us428",
+	};
+	struct usx2ydev	*us428 = hw->private_data;
+	int id = -1;
+
+	switch (le16_to_cpu(us428->dev->descriptor.idProduct)) {
+	case USB_ID_US122:
+		id = USX2Y_TYPE_122;
+		break;
+	case USB_ID_US224:
+		id = USX2Y_TYPE_224;
+		break;
+	case USB_ID_US428:
+		id = USX2Y_TYPE_428;
+		break;
+	}
+	if (id < 0)
+		return -ENODEV;
+	strcpy(info->id, type_ids[id]);
+	info->num_dsps = 2;		// 0: Prepad Data, 1: FPGA Code
+	if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
+		info->chip_ready = 1;
+	info->version = USX2Y_DRIVER_VERSION;
+	return 0;
+}
+
+static int usx2y_create_usbmidi(struct snd_card *card)
+{
+	static const struct snd_usb_midi_endpoint_info quirk_data_1 = {
+		.out_ep = 0x06,
+		.in_ep = 0x06,
+		.out_cables =	0x001,
+		.in_cables =	0x001
+	};
+	static const struct snd_usb_audio_quirk quirk_1 = {
+		.vendor_name =	"TASCAM",
+		.product_name =	NAME_ALLCAPS,
+		.ifnum =	0,
+		.type = QUIRK_MIDI_FIXED_ENDPOINT,
+		.data = &quirk_data_1
+	};
+	static const struct snd_usb_midi_endpoint_info quirk_data_2 = {
+		.out_ep = 0x06,
+		.in_ep = 0x06,
+		.out_cables =	0x003,
+		.in_cables =	0x003
+	};
+	static const struct snd_usb_audio_quirk quirk_2 = {
+		.vendor_name =	"TASCAM",
+		.product_name =	"US428",
+		.ifnum =	0,
+		.type = QUIRK_MIDI_FIXED_ENDPOINT,
+		.data = &quirk_data_2
+	};
+	struct usb_device *dev = usx2y(card)->dev;
+	struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
+	const struct snd_usb_audio_quirk *quirk =
+		le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
+		&quirk_2 : &quirk_1;
+
+	snd_printdd("%s\n", __func__);
+	return snd_usbmidi_create(card, iface, &usx2y(card)->midi_list, quirk);
+}
+
+static int usx2y_create_alsa_devices(struct snd_card *card)
+{
+	int err;
+
+	err = usx2y_create_usbmidi(card);
+	if (err < 0) {
+		snd_printk(KERN_ERR "%s: usx2y_create_usbmidi error %i\n", __func__, err);
+		return err;
+	}
+	err = usx2y_audio_create(card);
+	if (err < 0)
+		return err;
+	err = usx2y_hwdep_pcm_new(card);
+	if (err < 0)
+		return err;
+	err = snd_card_register(card);
+	if (err < 0)
+		return err;
+	return 0;
+}
+
+static int snd_usx2y_hwdep_dsp_load(struct snd_hwdep *hw,
+				    struct snd_hwdep_dsp_image *dsp)
+{
+	struct usx2ydev *priv = hw->private_data;
+	struct usb_device *dev = priv->dev;
+	int lret, err;
+	char *buf;
+
+	snd_printdd("dsp_load %s\n", dsp->name);
+
+	buf = memdup_user(dsp->image, dsp->length);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
+
+	err = usb_set_interface(dev, 0, 1);
+	if (err)
+		snd_printk(KERN_ERR "usb_set_interface error\n");
+	else
+		err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
+	kfree(buf);
+	if (err)
+		return err;
+	if (dsp->index == 1) {
+		msleep(250);				// give the device some time
+		err = usx2y_async_seq04_init(priv);
+		if (err) {
+			snd_printk(KERN_ERR "usx2y_async_seq04_init error\n");
+			return err;
+		}
+		err = usx2y_in04_init(priv);
+		if (err) {
+			snd_printk(KERN_ERR "usx2y_in04_init error\n");
+			return err;
+		}
+		err = usx2y_create_alsa_devices(hw->card);
+		if (err) {
+			snd_printk(KERN_ERR "usx2y_create_alsa_devices error %i\n", err);
+			return err;
+		}
+		priv->chip_status |= USX2Y_STAT_CHIP_INIT;
+		snd_printdd("%s: alsa all started\n", hw->name);
+	}
+	return err;
+}
+
+int usx2y_hwdep_new(struct snd_card *card, struct usb_device *device)
+{
+	int err;
+	struct snd_hwdep *hw;
+	struct usx2ydev	*us428 = usx2y(card);
+
+	err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw);
+	if (err < 0)
+		return err;
+
+	hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
+	hw->private_data = us428;
+	hw->ops.dsp_status = snd_usx2y_hwdep_dsp_status;
+	hw->ops.dsp_load = snd_usx2y_hwdep_dsp_load;
+	hw->ops.mmap = snd_us428ctls_mmap;
+	hw->ops.poll = snd_us428ctls_poll;
+	hw->exclusive = 1;
+	sprintf(hw->name, "/dev/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
+
+	us428->us428ctls_sharedmem = alloc_pages_exact(US428_SHAREDMEM_PAGES, GFP_KERNEL);
+	if (!us428->us428ctls_sharedmem)
+		return -ENOMEM;
+	memset(us428->us428ctls_sharedmem, -1, US428_SHAREDMEM_PAGES);
+	us428->us428ctls_sharedmem->ctl_snapshot_last = -2;
+
+	return 0;
+}