vm audit: add VM_DONTEXPAND to mmap for drivers that need it
[sfrench/cifs-2.6.git] / 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/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
33 int usX2Y_hwdep_pcm_new(struct snd_card *card);
34
35
36 static int snd_us428ctls_vm_fault(struct vm_area_struct *area,
37                                   struct vm_fault *vmf)
38 {
39         unsigned long offset;
40         struct page * page;
41         void *vaddr;
42
43         snd_printdd("ENTER, start %lXh, pgoff %ld\n",
44                    area->vm_start,
45                    vmf->pgoff);
46         
47         offset = vmf->pgoff << PAGE_SHIFT;
48         vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->us428ctls_sharedmem + offset;
49         page = virt_to_page(vaddr);
50         get_page(page);
51         vmf->page = page;
52
53         snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",
54                     vaddr, page);
55
56         return 0;
57 }
58
59 static struct vm_operations_struct us428ctls_vm_ops = {
60         .fault = snd_us428ctls_vm_fault,
61 };
62
63 static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)
64 {
65         unsigned long   size = (unsigned long)(area->vm_end - area->vm_start);
66         struct usX2Ydev *us428 = hw->private_data;
67
68         // FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
69         // so as long as the device isn't fully initialised yet we return -EBUSY here.
70         if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))
71                 return -EBUSY;
72
73         /* if userspace tries to mmap beyond end of our buffer, fail */ 
74         if (size > PAGE_ALIGN(sizeof(struct us428ctls_sharedmem))) {
75                 snd_printd( "%lu > %lu\n", size, (unsigned long)sizeof(struct us428ctls_sharedmem)); 
76                 return -EINVAL;
77         }
78
79         if (!us428->us428ctls_sharedmem) {
80                 init_waitqueue_head(&us428->us428ctls_wait_queue_head);
81                 if(!(us428->us428ctls_sharedmem = snd_malloc_pages(sizeof(struct us428ctls_sharedmem), GFP_KERNEL)))
82                         return -ENOMEM;
83                 memset(us428->us428ctls_sharedmem, -1, sizeof(struct us428ctls_sharedmem));
84                 us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
85         }
86         area->vm_ops = &us428ctls_vm_ops;
87         area->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
88         area->vm_private_data = hw->private_data;
89         return 0;
90 }
91
92 static unsigned int snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)
93 {
94         unsigned int    mask = 0;
95         struct usX2Ydev *us428 = hw->private_data;
96         struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;
97         if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
98                 return POLLHUP;
99
100         poll_wait(file, &us428->us428ctls_wait_queue_head, wait);
101
102         if (shm != NULL && shm->CtlSnapShotLast != shm->CtlSnapShotRed)
103                 mask |= POLLIN;
104
105         return mask;
106 }
107
108
109 static int snd_usX2Y_hwdep_open(struct snd_hwdep *hw, struct file *file)
110 {
111         return 0;
112 }
113
114 static int snd_usX2Y_hwdep_release(struct snd_hwdep *hw, struct file *file)
115 {
116         return 0;
117 }
118
119 static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
120                                       struct snd_hwdep_dsp_status *info)
121 {
122         static char *type_ids[USX2Y_TYPE_NUMS] = {
123                 [USX2Y_TYPE_122] = "us122",
124                 [USX2Y_TYPE_224] = "us224",
125                 [USX2Y_TYPE_428] = "us428",
126         };
127         struct usX2Ydev *us428 = hw->private_data;
128         int id = -1;
129
130         switch (le16_to_cpu(us428->chip.dev->descriptor.idProduct)) {
131         case USB_ID_US122:
132                 id = USX2Y_TYPE_122;
133                 break;
134         case USB_ID_US224:
135                 id = USX2Y_TYPE_224;
136                 break;
137         case USB_ID_US428:
138                 id = USX2Y_TYPE_428;
139                 break;
140         }
141         if (0 > id)
142                 return -ENODEV;
143         strcpy(info->id, type_ids[id]);
144         info->num_dsps = 2;             // 0: Prepad Data, 1: FPGA Code
145         if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
146                 info->chip_ready = 1;
147         info->version = USX2Y_DRIVER_VERSION; 
148         return 0;
149 }
150
151
152 static int usX2Y_create_usbmidi(struct snd_card *card)
153 {
154         static struct snd_usb_midi_endpoint_info quirk_data_1 = {
155                 .out_ep = 0x06,
156                 .in_ep = 0x06,
157                 .out_cables =   0x001,
158                 .in_cables =    0x001
159         };
160         static struct snd_usb_audio_quirk quirk_1 = {
161                 .vendor_name =  "TASCAM",
162                 .product_name = NAME_ALLCAPS,
163                 .ifnum =        0,
164                 .type = QUIRK_MIDI_FIXED_ENDPOINT,
165                 .data = &quirk_data_1
166         };
167         static struct snd_usb_midi_endpoint_info quirk_data_2 = {
168                 .out_ep = 0x06,
169                 .in_ep = 0x06,
170                 .out_cables =   0x003,
171                 .in_cables =    0x003
172         };
173         static struct snd_usb_audio_quirk quirk_2 = {
174                 .vendor_name =  "TASCAM",
175                 .product_name = "US428",
176                 .ifnum =        0,
177                 .type = QUIRK_MIDI_FIXED_ENDPOINT,
178                 .data = &quirk_data_2
179         };
180         struct usb_device *dev = usX2Y(card)->chip.dev;
181         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
182         struct snd_usb_audio_quirk *quirk =
183                 le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
184                 &quirk_2 : &quirk_1;
185
186         snd_printdd("usX2Y_create_usbmidi \n");
187         return snd_usb_create_midi_interface(&usX2Y(card)->chip, iface, quirk);
188 }
189
190 static int usX2Y_create_alsa_devices(struct snd_card *card)
191 {
192         int err;
193
194         do {
195                 if ((err = usX2Y_create_usbmidi(card)) < 0) {
196                         snd_printk(KERN_ERR "usX2Y_create_alsa_devices: usX2Y_create_usbmidi error %i \n", err);
197                         break;
198                 }
199                 if ((err = usX2Y_audio_create(card)) < 0) 
200                         break;
201                 if ((err = usX2Y_hwdep_pcm_new(card)) < 0)
202                         break;
203                 if ((err = snd_card_register(card)) < 0)
204                         break;
205         } while (0);
206
207         return err;
208
209
210 static int snd_usX2Y_hwdep_dsp_load(struct snd_hwdep *hw,
211                                     struct snd_hwdep_dsp_image *dsp)
212 {
213         struct usX2Ydev *priv = hw->private_data;
214         int     lret, err = -EINVAL;
215         snd_printdd( "dsp_load %s\n", dsp->name);
216
217         if (access_ok(VERIFY_READ, dsp->image, dsp->length)) {
218                 struct usb_device* dev = priv->chip.dev;
219                 char *buf = kmalloc(dsp->length, GFP_KERNEL);
220                 if (!buf)
221                         return -ENOMEM;
222                 if (copy_from_user(buf, dsp->image, dsp->length)) {
223                         kfree(buf);
224                         return -EFAULT;
225                 }
226                 err = usb_set_interface(dev, 0, 1);
227                 if (err)
228                         snd_printk(KERN_ERR "usb_set_interface error \n");
229                 else
230                         err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
231                 kfree(buf);
232         }
233         if (err)
234                 return err;
235         if (dsp->index == 1) {
236                 msleep(250);                            // give the device some time
237                 err = usX2Y_AsyncSeq04_init(priv);
238                 if (err) {
239                         snd_printk(KERN_ERR "usX2Y_AsyncSeq04_init error \n");
240                         return err;
241                 }
242                 err = usX2Y_In04_init(priv);
243                 if (err) {
244                         snd_printk(KERN_ERR "usX2Y_In04_init error \n");
245                         return err;
246                 }
247                 err = usX2Y_create_alsa_devices(hw->card);
248                 if (err) {
249                         snd_printk(KERN_ERR "usX2Y_create_alsa_devices error %i \n", err);
250                         snd_card_free(hw->card);
251                         return err;
252                 }
253                 priv->chip_status |= USX2Y_STAT_CHIP_INIT; 
254                 snd_printdd("%s: alsa all started\n", hw->name);
255         }
256         return err;
257 }
258
259
260 int usX2Y_hwdep_new(struct snd_card *card, struct usb_device* device)
261 {
262         int err;
263         struct snd_hwdep *hw;
264
265         if ((err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw)) < 0)
266                 return err;
267
268         hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
269         hw->private_data = usX2Y(card);
270         hw->ops.open = snd_usX2Y_hwdep_open;
271         hw->ops.release = snd_usX2Y_hwdep_release;
272         hw->ops.dsp_status = snd_usX2Y_hwdep_dsp_status;
273         hw->ops.dsp_load = snd_usX2Y_hwdep_dsp_load;
274         hw->ops.mmap = snd_us428ctls_mmap;
275         hw->ops.poll = snd_us428ctls_poll;
276         hw->exclusive = 1;
277         sprintf(hw->name, "/proc/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
278         return 0;
279 }
280