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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for Tascam US-X2Y USB soundcards4 *5 * FPGA Loader + ALSA Startup6 *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 21static 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 offset = vmf->pgoff << PAGE_SHIFT;28 vaddr = (char *)((struct usx2ydev *)vmf->vma->vm_private_data)->us428ctls_sharedmem + offset;29 page = virt_to_page(vaddr);30 get_page(page);31 vmf->page = page;32 33 return 0;34}35 36static const struct vm_operations_struct us428ctls_vm_ops = {37 .fault = snd_us428ctls_vm_fault,38};39 40static int snd_us428ctls_mmap(struct snd_hwdep *hw, struct file *filp, struct vm_area_struct *area)41{42 unsigned long size = (unsigned long)(area->vm_end - area->vm_start);43 struct usx2ydev *us428 = hw->private_data;44 45 // FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?46 // so as long as the device isn't fully initialised yet we return -EBUSY here.47 if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))48 return -EBUSY;49 50 /* if userspace tries to mmap beyond end of our buffer, fail */51 if (size > US428_SHAREDMEM_PAGES) {52 dev_dbg(hw->card->dev, "%s: mmap size %lu > %lu\n", __func__,53 size, (unsigned long)US428_SHAREDMEM_PAGES);54 return -EINVAL;55 }56 57 area->vm_ops = &us428ctls_vm_ops;58 vm_flags_set(area, VM_DONTEXPAND | VM_DONTDUMP);59 area->vm_private_data = hw->private_data;60 return 0;61}62 63static __poll_t snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)64{65 __poll_t mask = 0;66 struct usx2ydev *us428 = hw->private_data;67 struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;68 69 if (us428->chip_status & USX2Y_STAT_CHIP_HUP)70 return EPOLLHUP;71 72 poll_wait(file, &us428->us428ctls_wait_queue_head, wait);73 74 if (shm && shm->ctl_snapshot_last != shm->ctl_snapshot_red)75 mask |= EPOLLIN;76 77 return mask;78}79 80 81static int snd_usx2y_hwdep_dsp_status(struct snd_hwdep *hw,82 struct snd_hwdep_dsp_status *info)83{84 static const char * const type_ids[USX2Y_TYPE_NUMS] = {85 [USX2Y_TYPE_122] = "us122",86 [USX2Y_TYPE_224] = "us224",87 [USX2Y_TYPE_428] = "us428",88 };89 struct usx2ydev *us428 = hw->private_data;90 int id = -1;91 92 switch (le16_to_cpu(us428->dev->descriptor.idProduct)) {93 case USB_ID_US122:94 id = USX2Y_TYPE_122;95 break;96 case USB_ID_US224:97 id = USX2Y_TYPE_224;98 break;99 case USB_ID_US428:100 id = USX2Y_TYPE_428;101 break;102 }103 if (id < 0)104 return -ENODEV;105 strcpy(info->id, type_ids[id]);106 info->num_dsps = 2; // 0: Prepad Data, 1: FPGA Code107 if (us428->chip_status & USX2Y_STAT_CHIP_INIT)108 info->chip_ready = 1;109 info->version = USX2Y_DRIVER_VERSION;110 return 0;111}112 113static int usx2y_create_usbmidi(struct snd_card *card)114{115 static const struct snd_usb_midi_endpoint_info quirk_data_1 = {116 .out_ep = 0x06,117 .in_ep = 0x06,118 .out_cables = 0x001,119 .in_cables = 0x001120 };121 static const struct snd_usb_audio_quirk quirk_1 = {122 .vendor_name = "TASCAM",123 .product_name = NAME_ALLCAPS,124 .ifnum = 0,125 .type = QUIRK_MIDI_FIXED_ENDPOINT,126 .data = &quirk_data_1127 };128 static const struct snd_usb_midi_endpoint_info quirk_data_2 = {129 .out_ep = 0x06,130 .in_ep = 0x06,131 .out_cables = 0x003,132 .in_cables = 0x003133 };134 static const struct snd_usb_audio_quirk quirk_2 = {135 .vendor_name = "TASCAM",136 .product_name = "US428",137 .ifnum = 0,138 .type = QUIRK_MIDI_FIXED_ENDPOINT,139 .data = &quirk_data_2140 };141 struct usb_device *dev = usx2y(card)->dev;142 struct usb_interface *iface = usb_ifnum_to_if(dev, 0);143 const struct snd_usb_audio_quirk *quirk =144 le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?145 &quirk_2 : &quirk_1;146 147 return snd_usbmidi_create(card, iface, &usx2y(card)->midi_list, quirk);148}149 150static int usx2y_create_alsa_devices(struct snd_card *card)151{152 int err;153 154 err = usx2y_create_usbmidi(card);155 if (err < 0) {156 dev_err(card->dev, "%s: usx2y_create_usbmidi error %i\n",157 __func__, err);158 return err;159 }160 err = usx2y_audio_create(card);161 if (err < 0)162 return err;163 err = usx2y_hwdep_pcm_new(card);164 if (err < 0)165 return err;166 err = snd_card_register(card);167 if (err < 0)168 return err;169 return 0;170}171 172static int snd_usx2y_hwdep_dsp_load(struct snd_hwdep *hw,173 struct snd_hwdep_dsp_image *dsp)174{175 struct usx2ydev *priv = hw->private_data;176 struct usb_device *dev = priv->dev;177 int lret, err;178 char *buf;179 180 buf = memdup_user(dsp->image, dsp->length);181 if (IS_ERR(buf))182 return PTR_ERR(buf);183 184 err = usb_set_interface(dev, 0, 1);185 if (err)186 dev_err(&dev->dev, "usb_set_interface error\n");187 else188 err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);189 kfree(buf);190 if (err)191 return err;192 if (dsp->index == 1) {193 msleep(250); // give the device some time194 err = usx2y_async_seq04_init(priv);195 if (err) {196 dev_err(&dev->dev, "usx2y_async_seq04_init error\n");197 return err;198 }199 err = usx2y_in04_init(priv);200 if (err) {201 dev_err(&dev->dev, "usx2y_in04_init error\n");202 return err;203 }204 err = usx2y_create_alsa_devices(hw->card);205 if (err) {206 dev_err(&dev->dev, "usx2y_create_alsa_devices error %i\n", err);207 return err;208 }209 priv->chip_status |= USX2Y_STAT_CHIP_INIT;210 }211 return err;212}213 214int usx2y_hwdep_new(struct snd_card *card, struct usb_device *device)215{216 int err;217 struct snd_hwdep *hw;218 struct usx2ydev *us428 = usx2y(card);219 220 err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw);221 if (err < 0)222 return err;223 224 hw->iface = SNDRV_HWDEP_IFACE_USX2Y;225 hw->private_data = us428;226 hw->ops.dsp_status = snd_usx2y_hwdep_dsp_status;227 hw->ops.dsp_load = snd_usx2y_hwdep_dsp_load;228 hw->ops.mmap = snd_us428ctls_mmap;229 hw->ops.poll = snd_us428ctls_poll;230 hw->exclusive = 1;231 sprintf(hw->name, "/dev/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);232 233 us428->us428ctls_sharedmem = alloc_pages_exact(US428_SHAREDMEM_PAGES, GFP_KERNEL);234 if (!us428->us428ctls_sharedmem)235 return -ENOMEM;236 memset(us428->us428ctls_sharedmem, -1, US428_SHAREDMEM_PAGES);237 us428->us428ctls_sharedmem->ctl_snapshot_last = -2;238 239 return 0;240}241