sound/usb/usx2y/usX2Yhwdep.c

   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
  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
  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 > PAGE_ALIGN(sizeof(struct us428ctls_sharedmem))) {
  59                 snd_printd( "%lu > %lu\n", size, (unsigned long)sizeof(struct us428ctls_sharedmem));
  60                 return -EINVAL;
  61         }
  62
  63         if (!us428->us428ctls_sharedmem) {
  64                 init_waitqueue_head(&us428->us428ctls_wait_queue_head);
  65                 us428->us428ctls_sharedmem = alloc_pages_exact(sizeof(struct us428ctls_sharedmem), GFP_KERNEL);
  66                 if (!us428->us428ctls_sharedmem)
  67                         return -ENOMEM;
  68                 memset(us428->us428ctls_sharedmem, -1, sizeof(struct us428ctls_sharedmem));
  69                 us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
  70         }
  71         area->vm_ops = &us428ctls_vm_ops;
  72         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
  73         area->vm_private_data = hw->private_data;
  74         return 0;
  75 }
  76
  77 static __poll_t snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)
  78 {
  79         __poll_t        mask = 0;
  80         struct usX2Ydev *us428 = hw->private_data;
  81         struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;
  82         if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
  83                 return EPOLLHUP;
  84
  85         poll_wait(file, &us428->us428ctls_wait_queue_head, wait);
  86
  87         if (shm != NULL && shm->CtlSnapShotLast != shm->CtlSnapShotRed)
  88                 mask |= EPOLLIN;
  89
  90         return mask;
  91 }
  92
  93
  94 static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
  95                                       struct snd_hwdep_dsp_status *info)
  96 {
  97         static const char * const type_ids[USX2Y_TYPE_NUMS] = {
  98                 [USX2Y_TYPE_122] = "us122",
  99                 [USX2Y_TYPE_224] = "us224",
 100                 [USX2Y_TYPE_428] = "us428",
 101         };
 102         struct usX2Ydev *us428 = hw->private_data;
 103         int id = -1;
 104
 105         switch (le16_to_cpu(us428->dev->descriptor.idProduct)) {
 106         case USB_ID_US122:
 107                 id = USX2Y_TYPE_122;
 108                 break;
 109         case USB_ID_US224:
 110                 id = USX2Y_TYPE_224;
 111                 break;
 112         case USB_ID_US428:
 113                 id = USX2Y_TYPE_428;
 114                 break;
 115         }
 116         if (0 > id)
 117                 return -ENODEV;
 118         strcpy(info->id, type_ids[id]);
 119         info->num_dsps = 2;             // 0: Prepad Data, 1: FPGA Code
 120         if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
 121                 info->chip_ready = 1;
 122         info->version = USX2Y_DRIVER_VERSION;
 123         return 0;
 124 }
 125
 126
 127 static int usX2Y_create_usbmidi(struct snd_card *card)
 128 {
 129         static const struct snd_usb_midi_endpoint_info quirk_data_1 = {
 130                 .out_ep = 0x06,
 131                 .in_ep = 0x06,
 132                 .out_cables =   0x001,
 133                 .in_cables =    0x001
 134         };
 135         static const struct snd_usb_audio_quirk quirk_1 = {
 136                 .vendor_name =  "TASCAM",
 137                 .product_name = NAME_ALLCAPS,
 138                 .ifnum =        0,
 139                 .type = QUIRK_MIDI_FIXED_ENDPOINT,
 140                 .data = &quirk_data_1
 141         };
 142         static const struct snd_usb_midi_endpoint_info quirk_data_2 = {
 143                 .out_ep = 0x06,
 144                 .in_ep = 0x06,
 145                 .out_cables =   0x003,
 146                 .in_cables =    0x003
 147         };
 148         static const struct snd_usb_audio_quirk quirk_2 = {
 149                 .vendor_name =  "TASCAM",
 150                 .product_name = "US428",
 151                 .ifnum =        0,
 152                 .type = QUIRK_MIDI_FIXED_ENDPOINT,
 153                 .data = &quirk_data_2
 154         };
 155         struct usb_device *dev = usX2Y(card)->dev;
 156         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
 157         const struct snd_usb_audio_quirk *quirk =
 158                 le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
 159                 &quirk_2 : &quirk_1;
 160
 161         snd_printdd("usX2Y_create_usbmidi \n");
 162         return snd_usbmidi_create(card, iface, &usX2Y(card)->midi_list, quirk);
 163 }
 164
 165 static int usX2Y_create_alsa_devices(struct snd_card *card)
 166 {
 167         int err;
 168
 169         do {
 170                 if ((err = usX2Y_create_usbmidi(card)) < 0) {
 171                         snd_printk(KERN_ERR "usX2Y_create_alsa_devices: usX2Y_create_usbmidi error %i \n", err);
 172                         break;
 173                 }
 174                 if ((err = usX2Y_audio_create(card)) < 0)
 175                         break;
 176                 if ((err = usX2Y_hwdep_pcm_new(card)) < 0)
 177                         break;
 178                 if ((err = snd_card_register(card)) < 0)
 179                         break;
 180         } while (0);
 181
 182         return err;
 183 }
 184
 185 static int snd_usX2Y_hwdep_dsp_load(struct snd_hwdep *hw,
 186                                     struct snd_hwdep_dsp_image *dsp)
 187 {
 188         struct usX2Ydev *priv = hw->private_data;
 189         struct usb_device* dev = priv->dev;
 190         int lret, err;
 191         char *buf;
 192
 193         snd_printdd( "dsp_load %s\n", dsp->name);
 194
 195         buf = memdup_user(dsp->image, dsp->length);
 196         if (IS_ERR(buf))
 197                 return PTR_ERR(buf);
 198
 199         err = usb_set_interface(dev, 0, 1);
 200         if (err)
 201                 snd_printk(KERN_ERR "usb_set_interface error \n");
 202         else
 203                 err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
 204         kfree(buf);
 205         if (err)
 206                 return err;
 207         if (dsp->index == 1) {
 208                 msleep(250);                            // give the device some time
 209                 err = usX2Y_AsyncSeq04_init(priv);
 210                 if (err) {
 211                         snd_printk(KERN_ERR "usX2Y_AsyncSeq04_init error \n");
 212                         return err;
 213                 }
 214                 err = usX2Y_In04_init(priv);
 215                 if (err) {
 216                         snd_printk(KERN_ERR "usX2Y_In04_init error \n");
 217                         return err;
 218                 }
 219                 err = usX2Y_create_alsa_devices(hw->card);
 220                 if (err) {
 221                         snd_printk(KERN_ERR "usX2Y_create_alsa_devices error %i \n", err);
 222                         snd_card_free(hw->card);
 223                         return err;
 224                 }
 225                 priv->chip_status |= USX2Y_STAT_CHIP_INIT;
 226                 snd_printdd("%s: alsa all started\n", hw->name);
 227         }
 228         return err;
 229 }
 230
 231
 232 int usX2Y_hwdep_new(struct snd_card *card, struct usb_device* device)
 233 {
 234         int err;
 235         struct snd_hwdep *hw;
 236
 237         if ((err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw)) < 0)
 238                 return err;
 239
 240         hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
 241         hw->private_data = usX2Y(card);
 242         hw->ops.dsp_status = snd_usX2Y_hwdep_dsp_status;
 243         hw->ops.dsp_load = snd_usX2Y_hwdep_dsp_load;
 244         hw->ops.mmap = snd_us428ctls_mmap;
 245         hw->ops.poll = snd_us428ctls_poll;
 246         hw->exclusive = 1;
 247         sprintf(hw->name, "/dev/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
 248         return 0;
 249 }
 250