summaryrefslogtreecommitdiffstats
path: root/nuttx/configs/stm3220g-eval/src/up_usb.c
blob: 64fdda6f861de419fd85913cd2e84ee7b5adc96a (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
/************************************************************************************
 * configs/stm3220g-eval/src/up_usb.c
 * arch/arm/src/board/up_usb.c
 *
 *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ************************************************************************************/

/************************************************************************************
 * Included Files
 ************************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <sched.h>
#include <errno.h>
#include <debug.h>

#include <nuttx/usb/usbdev.h>
#include <nuttx/usb/usbhost.h>
#include <nuttx/usb/usbdev_trace.h>

#include "up_arch.h"
#include "stm32_internal.h"
#include "stm3220g-internal.h"

#ifdef CONFIG_STM32_OTGFS

/************************************************************************************
 * Definitions
 ************************************************************************************/

#if defined(CONFIG_USBDEV) || defined(CONFIG_USBHOST)
#  define HAVE_USB 1
#else
#  warning "CONFIG_STM32_OTGFS is enabled but neither CONFIG_USBDEV nor CONFIG_USBHOST"
#  undef HAVE_USB
#endif

#ifndef CONFIG_USBHOST_DEFPRIO
#  define CONFIG_USBHOST_DEFPRIO 50
#endif

#ifndef CONFIG_USBHOST_STACKSIZE
#  define CONFIG_USBHOST_STACKSIZE 1024
#endif

/************************************************************************************
 * Private Data
 ************************************************************************************/

#ifdef CONFIG_USBHOST
static struct usbhost_driver_s *g_drvr;
#endif

/************************************************************************************
 * Private Functions
 ************************************************************************************/

/************************************************************************************
 * Name: usbhost_waiter
 *
 * Description:
 *   Wait for USB devices to be connected.
 *
 ************************************************************************************/

#ifdef CONFIG_USBHOST
static int usbhost_waiter(int argc, char *argv[])
{
  bool connected = false;
  int ret;

  uvdbg("Running\n");
  for (;;)
    {
      /* Wait for the device to change state */

      ret = DRVR_WAIT(g_drvr, connected);
      DEBUGASSERT(ret == OK);

      connected = !connected;
      uvdbg("%s\n", connected ? "connected" : "disconnected");

      /* Did we just become connected? */

      if (connected)
        {
          /* Yes.. enumerate the newly connected device */

          (void)DRVR_ENUMERATE(g_drvr);
        }
    }

  /* Keep the compiler from complaining */

  return 0;
}
#endif

/************************************************************************************
 * Public Functions
 ************************************************************************************/

/************************************************************************************
 * Name: stm32_usbinitialize
 *
 * Description:
 *   Called from stm32_usbinitialize very early in inialization to setup USB-related
 *   GPIO pins for the STM3220G-EVAL board.
 *
 ************************************************************************************/

void stm32_usbinitialize(void)
{
#ifdef HAVE_USB
  /* The OTG FS has an internal soft pull-up.  No GPIO configuration is required */

  /* Configure the OTG FS VBUS sensing GPIO, Power On, and Overcurrent GPIOs */

  stm32_configgpio(GPIO_OTGFS_VBUS);
  stm32_configgpio(GPIO_OTGFS_PWRON);
  stm32_configgpio(GPIO_OTGFS_OVER);
#endif
}

/***********************************************************************************
 * Name: stm32_usbhost_initialize
 *
 * Description:
 *   Called at application startup time to initialize the USB host functionality.
 *   This function will start a thread that will monitor for device
 *   connection/disconnection events.
 *
 ***********************************************************************************/

#ifdef CONFIG_USBHOST
int stm32_usbhost_initialize(void)
{
  int pid;
  int ret;

  /* First, register all of the class drivers needed to support the drivers
   * that we care about:
   */

  uvdbg("Register class drivers\n");
  ret = usbhost_storageinit();
  if (ret != OK)
    {
      udbg("Failed to register the mass storage class\n");
    }

  /* Then get an instance of the USB host interface */

  uvdbg("Initialize USB host\n");
  g_drvr = usbhost_initialize(0);
  if (g_drvr)
    {
      /* Start a thread to handle device connection. */

      uvdbg("Start usbhost_waiter\n");

      pid = TASK_CREATE("usbhost", CONFIG_USBHOST_DEFPRIO,
                        CONFIG_USBHOST_STACKSIZE,
                        (main_t)usbhost_waiter, (const char **)NULL);
      return pid < 0 ? -ENOEXEC : OK;
    }

  return -ENODEV;
}
#endif

/***********************************************************************************
 * Name: stm32_usbhost_vbusdrive
 *
 * Description:
 *   Enable/disable driving of VBUS 5V output.  This function must be provided be
 *   each platform that implements the STM32 OTG FS host interface
 *
 *   "On-chip 5 V VBUS generation is not supported. For this reason, a charge pump 
 *    or, if 5 V are available on the application board, a basic power switch, must 
 *    be added externally to drive the 5 V VBUS line. The external charge pump can 
 *    be driven by any GPIO output. When the application decides to power on VBUS 
 *    using the chosen GPIO, it must also set the port power bit in the host port 
 *    control and status register (PPWR bit in OTG_FS_HPRT).
 *
 *   "The application uses this field to control power to this port, and the core 
 *    clears this bit on an overcurrent condition."
 *
 * Input Parameters:
 *   iface - For future growth to handle multiple USB host interface.  Should be zero.
 *   enable - true: enable VBUS power; false: disable VBUS power
 *
 * Returned Value:
 *   None
 *
 ***********************************************************************************/

#ifdef CONFIG_USBHOST
void stm32_usbhost_vbusdrive(int iface, bool enable)
{
  DEBUGASSERT(iface == 0);
  
  if (enable)
    {
      /* Enable the Power Switch by driving the enable pin low */

      stm32_gpiowrite(GPIO_OTGFS_PWRON, false);
    }
  else
    { 
      /* Disable the Power Switch by driving the enable pin high */
 
      stm32_gpiowrite(GPIO_OTGFS_PWRON, true);
    }
}
#endif

/************************************************************************************
 * Name: stm32_setup_overcurrent
 *
 * Description:
 *   Setup to receive an interrupt-level callback if an overcurrent condition is
 *   detected.
 *
 * Input paramter:
 *   handler - New overcurrent interrupt handler
 *
 * Returned value:
 *   Old overcurrent interrupt handler
 *
 ************************************************************************************/

#ifdef CONFIG_USBHOST
xcpt_t stm32_setup_overcurrent(xcpt_t handler)
{
  return stm32_gpiosetevent(GPIO_OTGFS_OVER, true, true, true, handler);
}
#endif

/************************************************************************************
 * Name:  stm32_usbsuspend
 *
 * Description:
 *   Board logic must provide the stm32_usbsuspend logic if the USBDEV driver is
 *   used.  This function is called whenever the USB enters or leaves suspend mode.
 *   This is an opportunity for the board logic to shutdown clocks, power, etc.
 *   while the USB is suspended.
 *
 ************************************************************************************/

#ifdef CONFIG_USBDEV
void stm32_usbsuspend(FAR struct usbdev_s *dev, bool resume)
{
  ulldbg("resume: %d\n", resume);
}
#endif

#endif /* CONFIG_STM32_OTGFS */