summaryrefslogtreecommitdiffstats
path: root/firmware/usb.c
blob: 876a5e4ec299f670d1fb6f727b4615a0e6af47d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 by Linus Nielsen Feltzing
 *
 * iPod driver based on code from the ipodlinux project - http://ipodlinux.org
 * Adapted for Rockbox in January 2006
 * Original file: podzilla/usb.c
 * Copyright (C) 2005 Adam Johnston
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "kernel.h"
#include "thread.h"
#include "system.h"
#include "debug.h"
#include "ata.h"
#include "fat.h"
#include "disk.h"
#include "panic.h"
#include "lcd.h"
#include "usb.h"
#include "button.h"
#include "sprintf.h"
#include "string.h"
#include "usb-target.h"
#ifdef IRIVER_H300_SERIES
#include "pcf50606.h"        /* for pcf50606_usb_charging_... */
#endif
#include "logf.h"

extern void dbg_ports(void); /* NASTY! defined in apps/ */

#ifdef HAVE_LCD_BITMAP
bool do_screendump_instead_of_usb = false;
void screen_dump(void);   /* Nasty again. Defined in apps/ too */
#endif

#if !defined(SIMULATOR) && !defined(USB_NONE)

#define NUM_POLL_READINGS (HZ/5)
static int countdown;

static int usb_state;

#if defined(HAVE_MMC) && !defined(BOOTLOADER)
static int usb_mmc_countdown = 0;
#endif

/* FIXME: The extra 0x800 is consumed by fat_mount() when the fsinfo
   needs updating */
#ifndef BOOTLOADER
static long usb_stack[(DEFAULT_STACK_SIZE + 0x800)/sizeof(long)];
static const char usb_thread_name[] = "usb";
#endif
static struct event_queue usb_queue;
static int last_usb_status;
static bool usb_monitor_enabled;


#ifndef BOOTLOADER
static void usb_slave_mode(bool on)
{
    int rc;
    
    if(on)
    {
        DEBUGF("Entering USB slave mode\n");
        ata_soft_reset();
        ata_init();
        ata_enable(false);
        usb_enable(true);
    }
    else
    {
        DEBUGF("Leaving USB slave mode\n");
        
        /* Let the ISDx00 settle */
        sleep(HZ*1);
        
        usb_enable(false);

        rc = ata_init();
        if(rc)
        {
            /* fixme: can we remove this? (already such in main.c) */
            char str[32];
            lcd_clear_display();
            snprintf(str, 31, "ATA error: %d", rc);
            lcd_puts(0, 0, str);
            lcd_puts(0, 1, "Press ON to debug");
            lcd_update();
            while(!(button_get(true) & BUTTON_REL)) {};
            dbg_ports();
            panicf("ata: %d",rc);
        }
    
        rc = disk_mount_all();
        if (rc <= 0) /* no partition */
            panicf("mount: %d",rc);

    }
}

static void usb_thread(void)
{
    int num_acks_to_expect = -1;
    bool waiting_for_ack;
    struct event ev;

    waiting_for_ack = false;

    while(1)
    {
        queue_wait(&usb_queue, &ev);
        switch(ev.id)
        {
#ifdef HAVE_USB_POWER
            case USB_POWERED:
                usb_state = USB_POWERED;
                break;
#endif
            case USB_INSERTED:
#ifdef HAVE_LCD_BITMAP
                if(do_screendump_instead_of_usb)
                {
                    screen_dump();
                }
                else
#endif
#ifdef HAVE_USB_POWER
                if((button_status() & ~USBPOWER_BTN_IGNORE) == USBPOWER_BUTTON)
                {
                    usb_state = USB_POWERED;
                }
                else
#endif
                {
                    /* Tell all threads that they have to back off the ATA.
                       We subtract one for our own thread. */
                    num_acks_to_expect =
                        queue_broadcast(SYS_USB_CONNECTED, 0) - 1;
                    waiting_for_ack = true;
                    DEBUGF("USB inserted. Waiting for ack from %d threads...\n",
                           num_acks_to_expect);
                }
                break;

            case SYS_USB_CONNECTED_ACK:
                if(waiting_for_ack)
                {
                    num_acks_to_expect--;
                    if(num_acks_to_expect == 0)
                    {
                        DEBUGF("All threads have acknowledged the connect.\n");
                        usb_slave_mode(true);
                        usb_state = USB_INSERTED;
                        cpu_idle_mode(true);
                    }
                    else
                    {
                        DEBUGF("usb: got ack, %d to go...\n",
                               num_acks_to_expect);
                    }
                }
                break;

            case USB_EXTRACTED:
#ifdef HAVE_LCD_BITMAP
                if(do_screendump_instead_of_usb)
                    break;
#endif
#ifdef HAVE_USB_POWER
                if(usb_state == USB_POWERED)
                {
                    usb_state = USB_EXTRACTED;
                    break;
                }
#endif
                if(usb_state == USB_INSERTED)
                {
                    /* Only disable the USB mode if we really have enabled it
                       some threads might not have acknowledged the
                       insertion */
                    usb_slave_mode(false);
                    cpu_idle_mode(false);
                }

                usb_state = USB_EXTRACTED;

                /* Tell all threads that we are back in business */
                num_acks_to_expect =
                    queue_broadcast(SYS_USB_DISCONNECTED, 0) - 1;
                waiting_for_ack = true;
                DEBUGF("USB extracted. Waiting for ack from %d threads...\n",
                       num_acks_to_expect);
                break;

            case SYS_USB_DISCONNECTED_ACK:
                if(waiting_for_ack)
                {
                    num_acks_to_expect--;
                    if(num_acks_to_expect == 0)
                    {
                        DEBUGF("All threads have acknowledged. "
                               "We're in business.\n");
                    }
                    else
                    {
                        DEBUGF("usb: got ack, %d to go...\n",
                               num_acks_to_expect);
                    }
                }
                break;

#ifdef HAVE_MMC
            case SYS_HOTSWAP_INSERTED:
            case SYS_HOTSWAP_EXTRACTED:
                if(usb_state == USB_INSERTED)
                {
                    usb_enable(false);
                    usb_mmc_countdown = HZ/2; /* re-enable after 0.5 sec */
                }
                break;

            case USB_REENABLE:
                if(usb_state == USB_INSERTED)
                    usb_enable(true);  /* reenable only if still inserted */
                break;
#endif
        }
    }
}
#endif


#ifndef BOOTLOADER
static void usb_tick(void)
{
    int current_status;

    if(usb_monitor_enabled)
    {
        current_status = usb_detect();
    
        /* Only report when the status has changed */
        if(current_status != last_usb_status)
        {
            last_usb_status = current_status;
            countdown = NUM_POLL_READINGS;
        }
        else
        {
            /* Count down until it gets negative */
            if(countdown >= 0)
                countdown--;

            /* Report to the thread if we have had 3 identical status
               readings in a row */
            if(countdown == 0)
            {
                queue_post(&usb_queue, current_status, 0);
            }
        }
    }
#ifdef HAVE_MMC
    if(usb_mmc_countdown > 0)
    {
        usb_mmc_countdown--;
        if (usb_mmc_countdown == 0)
            queue_post(&usb_queue, USB_REENABLE, 0);
    }
#endif
}
#endif

void usb_acknowledge(long id)
{
    queue_post(&usb_queue, id, 0);
}

void usb_init(void)
{
    usb_state = USB_EXTRACTED;
    usb_monitor_enabled = false;
    countdown = -1;

    usb_init_device();
    usb_enable(false);

    /* We assume that the USB cable is extracted */
    last_usb_status = false;

#ifndef BOOTLOADER
    queue_init(&usb_queue, true);
    queue_set_irq_safe(&usb_queue, true);
    
    create_thread(usb_thread, usb_stack, sizeof(usb_stack), 
                  usb_thread_name IF_PRIO(, PRIORITY_SYSTEM)
		  IF_COP(, CPU, false));

    tick_add_task(usb_tick);
#endif

}

void usb_wait_for_disconnect(struct event_queue *q)
{
    struct event ev;

    /* Don't return until we get SYS_USB_DISCONNECTED */
    while(1)
    {
        queue_wait(q, &ev);
        if(ev.id == SYS_USB_DISCONNECTED)
        {
            usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
            return;
        }
    }
}

int usb_wait_for_disconnect_w_tmo(struct event_queue *q, int ticks)
{
    struct event ev;

    /* Don't return until we get SYS_USB_DISCONNECTED or SYS_TIMEOUT */
    while(1)
    {
        queue_wait_w_tmo(q, &ev, ticks);
        switch(ev.id)
        {
            case SYS_USB_DISCONNECTED:
                usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
                return 0;
                break;
            case SYS_TIMEOUT:
                return 1;
                break;
        }
    }
}

void usb_start_monitoring(void)
{
    usb_monitor_enabled = true;
}

bool usb_inserted(void)
{
#ifdef HAVE_USB_POWER
    return usb_state == USB_INSERTED || usb_state == USB_POWERED;
#else
    return usb_state == USB_INSERTED;
#endif
}

#ifdef HAVE_USB_POWER
bool usb_powered(void)
{
    return usb_state == USB_POWERED;
}

#if CONFIG_CHARGING
bool usb_charging_enable(bool on)
{
    bool rc = false;
#ifdef IRIVER_H300_SERIES
    int irqlevel;
    logf("usb_charging_enable(%s)\n", on ? "on" : "off" );
    irqlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
    pcf50606_set_usb_charging(on);
    rc = on;
    (void)set_irq_level(irqlevel);
#else
    /* TODO: implement it for other targets... */
    (void)on;
#endif
    return rc;
}

bool usb_charging_enabled(void)
{
    bool rc = false;
#ifdef IRIVER_H300_SERIES
    /* TODO: read the state of the GPOOD2 register...
     * (this also means to set the irq level here) */
    rc = pcf50606_usb_charging_enabled();
#else
    /* TODO: implement it for other targets... */
#endif

    logf("usb_charging_enabled: %s\n", rc ? "true" : "false" );
    return rc;
}
#endif
#endif

#else

#ifdef USB_NONE
bool usb_inserted(void)
{
    return false;
}
#endif

/* Dummy simulator functions */
void usb_acknowledge(long id)
{
    id = id;
}

void usb_init(void)
{
}

void usb_start_monitoring(void)
{
}

int usb_detect(void)
{
    return USB_EXTRACTED;
}

void usb_wait_for_disconnect(struct event_queue *q)
{
   (void)q;
}

#endif /* USB_NONE or SIMULATOR */