linux/sound/usb/usx2y/usX2Yhwdep.c
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   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/usb.h>
  25#include <sound/core.h>
  26#include <sound/memalloc.h>
  27#include <sound/pcm.h>
  28#include <sound/hwdep.h>
  29#include "usx2y.h"
  30#include "usbusx2y.h"
  31#include "usX2Yhwdep.h"
  32
  33static int snd_us428ctls_vm_fault(struct vm_area_struct *area,
  34                                  struct vm_fault *vmf)
  35{
  36        unsigned long offset;
  37        struct page * page;
  38        void *vaddr;
  39
  40        snd_printdd("ENTER, start %lXh, pgoff %ld\n",
  41                   area->vm_start,
  42                   vmf->pgoff);
  43        
  44        offset = vmf->pgoff << PAGE_SHIFT;
  45        vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->us428ctls_sharedmem + offset;
  46        page = virt_to_page(vaddr);
  47        get_page(page);
  48        vmf->page = page;
  49
  50        snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",
  51                    vaddr, page);
  52
  53        return 0;
  54}
  55
  56static const struct vm_operations_struct us428ctls_vm_ops = {
  57        .fault = snd_us428ctls_vm_fault,
  58};
  59
  60static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)
  61{
  62        unsigned long   size = (unsigned long)(area->vm_end - area->vm_start);
  63        struct usX2Ydev *us428 = hw->private_data;
  64
  65        // FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
  66        // so as long as the device isn't fully initialised yet we return -EBUSY here.
  67        if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))
  68                return -EBUSY;
  69
  70        /* if userspace tries to mmap beyond end of our buffer, fail */ 
  71        if (size > PAGE_ALIGN(sizeof(struct us428ctls_sharedmem))) {
  72                snd_printd( "%lu > %lu\n", size, (unsigned long)sizeof(struct us428ctls_sharedmem)); 
  73                return -EINVAL;
  74        }
  75
  76        if (!us428->us428ctls_sharedmem) {
  77                init_waitqueue_head(&us428->us428ctls_wait_queue_head);
  78                if(!(us428->us428ctls_sharedmem = snd_malloc_pages(sizeof(struct us428ctls_sharedmem), GFP_KERNEL)))
  79                        return -ENOMEM;
  80                memset(us428->us428ctls_sharedmem, -1, sizeof(struct us428ctls_sharedmem));
  81                us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
  82        }
  83        area->vm_ops = &us428ctls_vm_ops;
  84        area->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
  85        area->vm_private_data = hw->private_data;
  86        return 0;
  87}
  88
  89static unsigned int snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)
  90{
  91        unsigned int    mask = 0;
  92        struct usX2Ydev *us428 = hw->private_data;
  93        struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;
  94        if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
  95                return POLLHUP;
  96
  97        poll_wait(file, &us428->us428ctls_wait_queue_head, wait);
  98
  99        if (shm != NULL && shm->CtlSnapShotLast != shm->CtlSnapShotRed)
 100                mask |= POLLIN;
 101
 102        return mask;
 103}
 104
 105
 106static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
 107                                      struct snd_hwdep_dsp_status *info)
 108{
 109        static char *type_ids[USX2Y_TYPE_NUMS] = {
 110                [USX2Y_TYPE_122] = "us122",
 111                [USX2Y_TYPE_224] = "us224",
 112                [USX2Y_TYPE_428] = "us428",
 113        };
 114        struct usX2Ydev *us428 = hw->private_data;
 115        int id = -1;
 116
 117        switch (le16_to_cpu(us428->chip.dev->descriptor.idProduct)) {
 118        case USB_ID_US122:
 119                id = USX2Y_TYPE_122;
 120                break;
 121        case USB_ID_US224:
 122                id = USX2Y_TYPE_224;
 123                break;
 124        case USB_ID_US428:
 125                id = USX2Y_TYPE_428;
 126                break;
 127        }
 128        if (0 > id)
 129                return -ENODEV;
 130        strcpy(info->id, type_ids[id]);
 131        info->num_dsps = 2;             // 0: Prepad Data, 1: FPGA Code
 132        if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
 133                info->chip_ready = 1;
 134        info->version = USX2Y_DRIVER_VERSION; 
 135        return 0;
 136}
 137
 138
 139static int usX2Y_create_usbmidi(struct snd_card *card)
 140{
 141        static struct snd_usb_midi_endpoint_info quirk_data_1 = {
 142                .out_ep = 0x06,
 143                .in_ep = 0x06,
 144                .out_cables =   0x001,
 145                .in_cables =    0x001
 146        };
 147        static struct snd_usb_audio_quirk quirk_1 = {
 148                .vendor_name =  "TASCAM",
 149                .product_name = NAME_ALLCAPS,
 150                .ifnum =        0,
 151                .type = QUIRK_MIDI_FIXED_ENDPOINT,
 152                .data = &quirk_data_1
 153        };
 154        static struct snd_usb_midi_endpoint_info quirk_data_2 = {
 155                .out_ep = 0x06,
 156                .in_ep = 0x06,
 157                .out_cables =   0x003,
 158                .in_cables =    0x003
 159        };
 160        static struct snd_usb_audio_quirk quirk_2 = {
 161                .vendor_name =  "TASCAM",
 162                .product_name = "US428",
 163                .ifnum =        0,
 164                .type = QUIRK_MIDI_FIXED_ENDPOINT,
 165                .data = &quirk_data_2
 166        };
 167        struct usb_device *dev = usX2Y(card)->chip.dev;
 168        struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
 169        struct snd_usb_audio_quirk *quirk =
 170                le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
 171                &quirk_2 : &quirk_1;
 172
 173        snd_printdd("usX2Y_create_usbmidi \n");
 174        return snd_usb_create_midi_interface(&usX2Y(card)->chip, iface, quirk);
 175}
 176
 177static int usX2Y_create_alsa_devices(struct snd_card *card)
 178{
 179        int err;
 180
 181        do {
 182                if ((err = usX2Y_create_usbmidi(card)) < 0) {
 183                        snd_printk(KERN_ERR "usX2Y_create_alsa_devices: usX2Y_create_usbmidi error %i \n", err);
 184                        break;
 185                }
 186                if ((err = usX2Y_audio_create(card)) < 0) 
 187                        break;
 188                if ((err = usX2Y_hwdep_pcm_new(card)) < 0)
 189                        break;
 190                if ((err = snd_card_register(card)) < 0)
 191                        break;
 192        } while (0);
 193
 194        return err;
 195} 
 196
 197static int snd_usX2Y_hwdep_dsp_load(struct snd_hwdep *hw,
 198                                    struct snd_hwdep_dsp_image *dsp)
 199{
 200        struct usX2Ydev *priv = hw->private_data;
 201        int     lret, err = -EINVAL;
 202        snd_printdd( "dsp_load %s\n", dsp->name);
 203
 204        if (access_ok(VERIFY_READ, dsp->image, dsp->length)) {
 205                struct usb_device* dev = priv->chip.dev;
 206                char *buf;
 207
 208                buf = memdup_user(dsp->image, dsp->length);
 209                if (IS_ERR(buf))
 210                        return PTR_ERR(buf);
 211
 212                err = usb_set_interface(dev, 0, 1);
 213                if (err)
 214                        snd_printk(KERN_ERR "usb_set_interface error \n");
 215                else
 216                        err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
 217                kfree(buf);
 218        }
 219        if (err)
 220                return err;
 221        if (dsp->index == 1) {
 222                msleep(250);                            // give the device some time
 223                err = usX2Y_AsyncSeq04_init(priv);
 224                if (err) {
 225                        snd_printk(KERN_ERR "usX2Y_AsyncSeq04_init error \n");
 226                        return err;
 227                }
 228                err = usX2Y_In04_init(priv);
 229                if (err) {
 230                        snd_printk(KERN_ERR "usX2Y_In04_init error \n");
 231                        return err;
 232                }
 233                err = usX2Y_create_alsa_devices(hw->card);
 234                if (err) {
 235                        snd_printk(KERN_ERR "usX2Y_create_alsa_devices error %i \n", err);
 236                        snd_card_free(hw->card);
 237                        return err;
 238                }
 239                priv->chip_status |= USX2Y_STAT_CHIP_INIT; 
 240                snd_printdd("%s: alsa all started\n", hw->name);
 241        }
 242        return err;
 243}
 244
 245
 246int usX2Y_hwdep_new(struct snd_card *card, struct usb_device* device)
 247{
 248        int err;
 249        struct snd_hwdep *hw;
 250
 251        if ((err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw)) < 0)
 252                return err;
 253
 254        hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
 255        hw->private_data = usX2Y(card);
 256        hw->ops.dsp_status = snd_usX2Y_hwdep_dsp_status;
 257        hw->ops.dsp_load = snd_usX2Y_hwdep_dsp_load;
 258        hw->ops.mmap = snd_us428ctls_mmap;
 259        hw->ops.poll = snd_us428ctls_poll;
 260        hw->exclusive = 1;
 261        sprintf(hw->name, "/proc/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
 262        return 0;
 263}
 264
 265