kernel/sound/usb/usx2y/usX2Yhwdep.c

   1 /*
   2  * Driver for Tascam US-X2Y USB soundcards
   3  *
   4  * FPGA Loader + ALSA Startup
   5  *
   6  * Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.de>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  */
  22
  23 #include <linux/interrupt.h>
  24 #include <linux/slab.h>
  25 #include <linux/usb.h>
  26 #include <sound/core.h>
  27 #include <sound/memalloc.h>
  28 #include <sound/pcm.h>
  29 #include <sound/hwdep.h>
  30 #include "usx2y.h"
  31 #include "usbusx2y.h"
  32 #include "usX2Yhwdep.h"
  33
  34 static int snd_us428ctls_vm_fault(struct vm_area_struct *area,
  35                                   struct vm_fault *vmf)
  36 {
  37         unsigned long offset;
  38         struct page * page;
  39         void *vaddr;
  40
  41         snd_printdd("ENTER, start %lXh, pgoff %ld\n",
  42                    area->vm_start,
  43                    vmf->pgoff);
  44
  45         offset = vmf->pgoff << PAGE_SHIFT;
  46         vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->us428ctls_sharedmem + offset;
  47         page = virt_to_page(vaddr);
  48         get_page(page);
  49         vmf->page = page;
  50
  51         snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",
  52                     vaddr, page);
  53
  54         return 0;
  55 }
  56
  57 static const struct vm_operations_struct us428ctls_vm_ops = {
  58         .fault = snd_us428ctls_vm_fault,
  59 };
  60
  61 static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)
  62 {
  63         unsigned long   size = (unsigned long)(area->vm_end - area->vm_start);
  64         struct usX2Ydev *us428 = hw->private_data;
  65
  66         // FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
  67         // so as long as the device isn't fully initialised yet we return -EBUSY here.
  68         if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))
  69                 return -EBUSY;
  70
  71         /* if userspace tries to mmap beyond end of our buffer, fail */
  72         if (size > PAGE_ALIGN(sizeof(struct us428ctls_sharedmem))) {
  73                 snd_printd( "%lu > %lu\n", size, (unsigned long)sizeof(struct us428ctls_sharedmem));
  74                 return -EINVAL;
  75         }
  76
  77         if (!us428->us428ctls_sharedmem) {
  78                 init_waitqueue_head(&us428->us428ctls_wait_queue_head);
  79                 if(!(us428->us428ctls_sharedmem = snd_malloc_pages(sizeof(struct us428ctls_sharedmem), GFP_KERNEL)))
  80                         return -ENOMEM;
  81                 memset(us428->us428ctls_sharedmem, -1, sizeof(struct us428ctls_sharedmem));
  82                 us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
  83         }
  84         area->vm_ops = &us428ctls_vm_ops;
  85         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
  86         area->vm_private_data = hw->private_data;
  87         return 0;
  88 }
  89
  90 static unsigned int snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)
  91 {
  92         unsigned int    mask = 0;
  93         struct usX2Ydev *us428 = hw->private_data;
  94         struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;
  95         if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
  96                 return POLLHUP;
  97
  98         poll_wait(file, &us428->us428ctls_wait_queue_head, wait);
  99
 100         if (shm != NULL && shm->CtlSnapShotLast != shm->CtlSnapShotRed)
 101                 mask |= POLLIN;
 102
 103         return mask;
 104 }
 105
 106
 107 static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
 108                                       struct snd_hwdep_dsp_status *info)
 109 {
 110         static char *type_ids[USX2Y_TYPE_NUMS] = {
 111                 [USX2Y_TYPE_122] = "us122",
 112                 [USX2Y_TYPE_224] = "us224",
 113                 [USX2Y_TYPE_428] = "us428",
 114         };
 115         struct usX2Ydev *us428 = hw->private_data;
 116         int id = -1;
 117
 118         switch (le16_to_cpu(us428->dev->descriptor.idProduct)) {
 119         case USB_ID_US122:
 120                 id = USX2Y_TYPE_122;
 121                 break;
 122         case USB_ID_US224:
 123                 id = USX2Y_TYPE_224;
 124                 break;
 125         case USB_ID_US428:
 126                 id = USX2Y_TYPE_428;
 127                 break;
 128         }
 129         if (0 > id)
 130                 return -ENODEV;
 131         strcpy(info->id, type_ids[id]);
 132         info->num_dsps = 2;             // 0: Prepad Data, 1: FPGA Code
 133         if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
 134                 info->chip_ready = 1;
 135         info->version = USX2Y_DRIVER_VERSION;
 136         return 0;
 137 }
 138
 139
 140 static int usX2Y_create_usbmidi(struct snd_card *card)
 141 {
 142         static struct snd_usb_midi_endpoint_info quirk_data_1 = {
 143                 .out_ep = 0x06,
 144                 .in_ep = 0x06,
 145                 .out_cables =   0x001,
 146                 .in_cables =    0x001
 147         };
 148         static struct snd_usb_audio_quirk quirk_1 = {
 149                 .vendor_name =  "TASCAM",
 150                 .product_name = NAME_ALLCAPS,
 151                 .ifnum =        0,
 152                 .type = QUIRK_MIDI_FIXED_ENDPOINT,
 153                 .data = &quirk_data_1
 154         };
 155         static struct snd_usb_midi_endpoint_info quirk_data_2 = {
 156                 .out_ep = 0x06,
 157                 .in_ep = 0x06,
 158                 .out_cables =   0x003,
 159                 .in_cables =    0x003
 160         };
 161         static struct snd_usb_audio_quirk quirk_2 = {
 162                 .vendor_name =  "TASCAM",
 163                 .product_name = "US428",
 164                 .ifnum =        0,
 165                 .type = QUIRK_MIDI_FIXED_ENDPOINT,
 166                 .data = &quirk_data_2
 167         };
 168         struct usb_device *dev = usX2Y(card)->dev;
 169         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
 170         struct snd_usb_audio_quirk *quirk =
 171                 le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
 172                 &quirk_2 : &quirk_1;
 173
 174         snd_printdd("usX2Y_create_usbmidi \n");
 175         return snd_usbmidi_create(card, iface, &usX2Y(card)->midi_list, quirk);
 176 }
 177
 178 static int usX2Y_create_alsa_devices(struct snd_card *card)
 179 {
 180         int err;
 181
 182         do {
 183                 if ((err = usX2Y_create_usbmidi(card)) < 0) {
 184                         snd_printk(KERN_ERR "usX2Y_create_alsa_devices: usX2Y_create_usbmidi error %i \n", err);
 185                         break;
 186                 }
 187                 if ((err = usX2Y_audio_create(card)) < 0)
 188                         break;
 189                 if ((err = usX2Y_hwdep_pcm_new(card)) < 0)
 190                         break;
 191                 if ((err = snd_card_register(card)) < 0)
 192                         break;
 193         } while (0);
 194
 195         return err;
 196 }
 197
 198 static int snd_usX2Y_hwdep_dsp_load(struct snd_hwdep *hw,
 199                                     struct snd_hwdep_dsp_image *dsp)
 200 {
 201         struct usX2Ydev *priv = hw->private_data;
 202         int     lret, err = -EINVAL;
 203         snd_printdd( "dsp_load %s\n", dsp->name);
 204
 205         if (access_ok(VERIFY_READ, dsp->image, dsp->length)) {
 206                 struct usb_device* dev = priv->dev;
 207                 char *buf;
 208
 209                 buf = memdup_user(dsp->image, dsp->length);
 210                 if (IS_ERR(buf))
 211                         return PTR_ERR(buf);
 212
 213                 err = usb_set_interface(dev, 0, 1);
 214                 if (err)
 215                         snd_printk(KERN_ERR "usb_set_interface error \n");
 216                 else
 217                         err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
 218                 kfree(buf);
 219         }
 220         if (err)
 221                 return err;
 222         if (dsp->index == 1) {
 223                 msleep(250);                            // give the device some time
 224                 err = usX2Y_AsyncSeq04_init(priv);
 225                 if (err) {
 226                         snd_printk(KERN_ERR "usX2Y_AsyncSeq04_init error \n");
 227                         return err;
 228                 }
 229                 err = usX2Y_In04_init(priv);
 230                 if (err) {
 231                         snd_printk(KERN_ERR "usX2Y_In04_init error \n");
 232                         return err;
 233                 }
 234                 err = usX2Y_create_alsa_devices(hw->card);
 235                 if (err) {
 236                         snd_printk(KERN_ERR "usX2Y_create_alsa_devices error %i \n", err);
 237                         snd_card_free(hw->card);
 238                         return err;
 239                 }
 240                 priv->chip_status |= USX2Y_STAT_CHIP_INIT;
 241                 snd_printdd("%s: alsa all started\n", hw->name);
 242         }
 243         return err;
 244 }
 245
 246
 247 int usX2Y_hwdep_new(struct snd_card *card, struct usb_device* device)
 248 {
 249         int err;
 250         struct snd_hwdep *hw;
 251
 252         if ((err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw)) < 0)
 253                 return err;
 254
 255         hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
 256         hw->private_data = usX2Y(card);
 257         hw->ops.dsp_status = snd_usX2Y_hwdep_dsp_status;
 258         hw->ops.dsp_load = snd_usX2Y_hwdep_dsp_load;
 259         hw->ops.mmap = snd_us428ctls_mmap;
 260         hw->ops.poll = snd_us428ctls_poll;
 261         hw->exclusive = 1;
 262         sprintf(hw->name, "/proc/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
 263         return 0;
 264 }
 265