xref: /openbmc/linux/sound/usb/usx2y/usX2Yhwdep.c (revision 1c71222e)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Driver for Tascam US-X2Y USB soundcards
4  *
5  * FPGA Loader + ALSA Startup
6  *
7  * Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.de>
8  */
9 
10 #include <linux/interrupt.h>
11 #include <linux/slab.h>
12 #include <linux/usb.h>
13 #include <sound/core.h>
14 #include <sound/memalloc.h>
15 #include <sound/pcm.h>
16 #include <sound/hwdep.h>
17 #include "usx2y.h"
18 #include "usbusx2y.h"
19 #include "usX2Yhwdep.h"
20 
snd_us428ctls_vm_fault(struct vm_fault * vmf)21 static vm_fault_t snd_us428ctls_vm_fault(struct vm_fault *vmf)
22 {
23 	unsigned long offset;
24 	struct page *page;
25 	void *vaddr;
26 
27 	snd_printdd("ENTER, start %lXh, pgoff %ld\n",
28 		   vmf->vma->vm_start,
29 		   vmf->pgoff);
30 
31 	offset = vmf->pgoff << PAGE_SHIFT;
32 	vaddr = (char *)((struct usx2ydev *)vmf->vma->vm_private_data)->us428ctls_sharedmem + offset;
33 	page = virt_to_page(vaddr);
34 	get_page(page);
35 	vmf->page = page;
36 
37 	snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",
38 		    vaddr, page);
39 
40 	return 0;
41 }
42 
43 static const struct vm_operations_struct us428ctls_vm_ops = {
44 	.fault = snd_us428ctls_vm_fault,
45 };
46 
snd_us428ctls_mmap(struct snd_hwdep * hw,struct file * filp,struct vm_area_struct * area)47 static int snd_us428ctls_mmap(struct snd_hwdep *hw, struct file *filp, struct vm_area_struct *area)
48 {
49 	unsigned long	size = (unsigned long)(area->vm_end - area->vm_start);
50 	struct usx2ydev	*us428 = hw->private_data;
51 
52 	// FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
53 	// so as long as the device isn't fully initialised yet we return -EBUSY here.
54 	if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))
55 		return -EBUSY;
56 
57 	/* if userspace tries to mmap beyond end of our buffer, fail */
58 	if (size > US428_SHAREDMEM_PAGES) {
59 		snd_printd("%lu > %lu\n", size, (unsigned long)US428_SHAREDMEM_PAGES);
60 		return -EINVAL;
61 	}
62 
63 	area->vm_ops = &us428ctls_vm_ops;
64 	vm_flags_set(area, VM_DONTEXPAND | VM_DONTDUMP);
65 	area->vm_private_data = hw->private_data;
66 	return 0;
67 }
68 
snd_us428ctls_poll(struct snd_hwdep * hw,struct file * file,poll_table * wait)69 static __poll_t snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)
70 {
71 	__poll_t	mask = 0;
72 	struct usx2ydev	*us428 = hw->private_data;
73 	struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;
74 
75 	if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
76 		return EPOLLHUP;
77 
78 	poll_wait(file, &us428->us428ctls_wait_queue_head, wait);
79 
80 	if (shm && shm->ctl_snapshot_last != shm->ctl_snapshot_red)
81 		mask |= EPOLLIN;
82 
83 	return mask;
84 }
85 
86 
snd_usx2y_hwdep_dsp_status(struct snd_hwdep * hw,struct snd_hwdep_dsp_status * info)87 static int snd_usx2y_hwdep_dsp_status(struct snd_hwdep *hw,
88 				      struct snd_hwdep_dsp_status *info)
89 {
90 	static const char * const type_ids[USX2Y_TYPE_NUMS] = {
91 		[USX2Y_TYPE_122] = "us122",
92 		[USX2Y_TYPE_224] = "us224",
93 		[USX2Y_TYPE_428] = "us428",
94 	};
95 	struct usx2ydev	*us428 = hw->private_data;
96 	int id = -1;
97 
98 	switch (le16_to_cpu(us428->dev->descriptor.idProduct)) {
99 	case USB_ID_US122:
100 		id = USX2Y_TYPE_122;
101 		break;
102 	case USB_ID_US224:
103 		id = USX2Y_TYPE_224;
104 		break;
105 	case USB_ID_US428:
106 		id = USX2Y_TYPE_428;
107 		break;
108 	}
109 	if (id < 0)
110 		return -ENODEV;
111 	strcpy(info->id, type_ids[id]);
112 	info->num_dsps = 2;		// 0: Prepad Data, 1: FPGA Code
113 	if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
114 		info->chip_ready = 1;
115 	info->version = USX2Y_DRIVER_VERSION;
116 	return 0;
117 }
118 
usx2y_create_usbmidi(struct snd_card * card)119 static int usx2y_create_usbmidi(struct snd_card *card)
120 {
121 	static const struct snd_usb_midi_endpoint_info quirk_data_1 = {
122 		.out_ep = 0x06,
123 		.in_ep = 0x06,
124 		.out_cables =	0x001,
125 		.in_cables =	0x001
126 	};
127 	static const struct snd_usb_audio_quirk quirk_1 = {
128 		.vendor_name =	"TASCAM",
129 		.product_name =	NAME_ALLCAPS,
130 		.ifnum =	0,
131 		.type = QUIRK_MIDI_FIXED_ENDPOINT,
132 		.data = &quirk_data_1
133 	};
134 	static const struct snd_usb_midi_endpoint_info quirk_data_2 = {
135 		.out_ep = 0x06,
136 		.in_ep = 0x06,
137 		.out_cables =	0x003,
138 		.in_cables =	0x003
139 	};
140 	static const struct snd_usb_audio_quirk quirk_2 = {
141 		.vendor_name =	"TASCAM",
142 		.product_name =	"US428",
143 		.ifnum =	0,
144 		.type = QUIRK_MIDI_FIXED_ENDPOINT,
145 		.data = &quirk_data_2
146 	};
147 	struct usb_device *dev = usx2y(card)->dev;
148 	struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
149 	const struct snd_usb_audio_quirk *quirk =
150 		le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
151 		&quirk_2 : &quirk_1;
152 
153 	snd_printdd("%s\n", __func__);
154 	return snd_usbmidi_create(card, iface, &usx2y(card)->midi_list, quirk);
155 }
156 
usx2y_create_alsa_devices(struct snd_card * card)157 static int usx2y_create_alsa_devices(struct snd_card *card)
158 {
159 	int err;
160 
161 	err = usx2y_create_usbmidi(card);
162 	if (err < 0) {
163 		snd_printk(KERN_ERR "%s: usx2y_create_usbmidi error %i\n", __func__, err);
164 		return err;
165 	}
166 	err = usx2y_audio_create(card);
167 	if (err < 0)
168 		return err;
169 	err = usx2y_hwdep_pcm_new(card);
170 	if (err < 0)
171 		return err;
172 	err = snd_card_register(card);
173 	if (err < 0)
174 		return err;
175 	return 0;
176 }
177 
snd_usx2y_hwdep_dsp_load(struct snd_hwdep * hw,struct snd_hwdep_dsp_image * dsp)178 static int snd_usx2y_hwdep_dsp_load(struct snd_hwdep *hw,
179 				    struct snd_hwdep_dsp_image *dsp)
180 {
181 	struct usx2ydev *priv = hw->private_data;
182 	struct usb_device *dev = priv->dev;
183 	int lret, err;
184 	char *buf;
185 
186 	snd_printdd("dsp_load %s\n", dsp->name);
187 
188 	buf = memdup_user(dsp->image, dsp->length);
189 	if (IS_ERR(buf))
190 		return PTR_ERR(buf);
191 
192 	err = usb_set_interface(dev, 0, 1);
193 	if (err)
194 		snd_printk(KERN_ERR "usb_set_interface error\n");
195 	else
196 		err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
197 	kfree(buf);
198 	if (err)
199 		return err;
200 	if (dsp->index == 1) {
201 		msleep(250);				// give the device some time
202 		err = usx2y_async_seq04_init(priv);
203 		if (err) {
204 			snd_printk(KERN_ERR "usx2y_async_seq04_init error\n");
205 			return err;
206 		}
207 		err = usx2y_in04_init(priv);
208 		if (err) {
209 			snd_printk(KERN_ERR "usx2y_in04_init error\n");
210 			return err;
211 		}
212 		err = usx2y_create_alsa_devices(hw->card);
213 		if (err) {
214 			snd_printk(KERN_ERR "usx2y_create_alsa_devices error %i\n", err);
215 			return err;
216 		}
217 		priv->chip_status |= USX2Y_STAT_CHIP_INIT;
218 		snd_printdd("%s: alsa all started\n", hw->name);
219 	}
220 	return err;
221 }
222 
usx2y_hwdep_new(struct snd_card * card,struct usb_device * device)223 int usx2y_hwdep_new(struct snd_card *card, struct usb_device *device)
224 {
225 	int err;
226 	struct snd_hwdep *hw;
227 	struct usx2ydev	*us428 = usx2y(card);
228 
229 	err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw);
230 	if (err < 0)
231 		return err;
232 
233 	hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
234 	hw->private_data = us428;
235 	hw->ops.dsp_status = snd_usx2y_hwdep_dsp_status;
236 	hw->ops.dsp_load = snd_usx2y_hwdep_dsp_load;
237 	hw->ops.mmap = snd_us428ctls_mmap;
238 	hw->ops.poll = snd_us428ctls_poll;
239 	hw->exclusive = 1;
240 	sprintf(hw->name, "/dev/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
241 
242 	us428->us428ctls_sharedmem = alloc_pages_exact(US428_SHAREDMEM_PAGES, GFP_KERNEL);
243 	if (!us428->us428ctls_sharedmem)
244 		return -ENOMEM;
245 	memset(us428->us428ctls_sharedmem, -1, US428_SHAREDMEM_PAGES);
246 	us428->us428ctls_sharedmem->ctl_snapshot_last = -2;
247 
248 	return 0;
249 }
250