uark.c revision 1.11 1 /* $NetBSD: uark.c,v 1.11 2016/11/25 12:56:29 skrll Exp $ */
2 /* $OpenBSD: uark.c,v 1.13 2009/10/13 19:33:17 pirofti Exp $ */
3
4 /*
5 * Copyright (c) 2006 Jonathan Gray <jsg (at) openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/cdefs.h>
21 __KERNEL_RCSID(0, "$NetBSD: uark.c,v 1.11 2016/11/25 12:56:29 skrll Exp $");
22
23 #ifdef _KERNEL_OPT
24 #include "opt_usb.h"
25 #endif
26
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/kernel.h>
30 #include <sys/conf.h>
31 #include <sys/tty.h>
32 #include <sys/device.h>
33
34 #include <dev/usb/usb.h>
35 #include <dev/usb/usbdi.h>
36 #include <dev/usb/usbdi_util.h>
37 #include <dev/usb/usbdevs.h>
38
39 #include <dev/usb/ucomvar.h>
40
41 #ifdef UARK_DEBUG
42 #define DPRINTFN(n, x) do { if (uarkdebug > (n)) printf x; } while (0)
43 int uarkebug = 0;
44 #else
45 #define DPRINTFN(n, x)
46 #endif
47 #define DPRINTF(x) DPRINTFN(0, x)
48
49 #define UARKBUFSZ 256
50 #define UARK_CONFIG_NO 0
51 #define UARK_IFACE_NO 0
52
53 #define UARK_SET_DATA_BITS(x) (x - 5)
54
55 #define UARK_PARITY_NONE 0x00
56 #define UARK_PARITY_ODD 0x08
57 #define UARK_PARITY_EVEN 0x18
58
59 #define UARK_STOP_BITS_1 0x00
60 #define UARK_STOP_BITS_2 0x04
61
62 #define UARK_BAUD_REF 3000000
63
64 #define UARK_WRITE 0x40
65 #define UARK_READ 0xc0
66
67 #define UARK_REQUEST 0xfe
68
69 struct uark_softc {
70 device_t sc_dev;
71 struct usbd_device * sc_udev;
72 struct usbd_interface * sc_iface;
73 device_t sc_subdev;
74
75 u_char sc_msr;
76 u_char sc_lsr;
77
78 u_char sc_dying;
79 };
80
81 void uark_get_status(void *, int portno, u_char *lsr, u_char *msr);
82 void uark_set(void *, int, int, int);
83 int uark_param(void *, int, struct termios *);
84 void uark_break(void *, int, int);
85 int uark_cmd(struct uark_softc *, uint16_t, uint16_t);
86
87 struct ucom_methods uark_methods = {
88 .ucom_get_status = uark_get_status,
89 .ucom_set = uark_set,
90 .ucom_param = uark_param,
91 .ucom_ioctl = NULL,
92 .ucom_open = NULL,
93 .ucom_close = NULL,
94 .ucom_read = NULL,
95 .ucom_write = NULL,
96 };
97
98 static const struct usb_devno uark_devs[] = {
99 { USB_VENDOR_ARKMICROCHIPS, USB_PRODUCT_ARKMICROCHIPS_USBSERIAL },
100 };
101
102 int uark_match(device_t, cfdata_t, void *);
103 void uark_attach(device_t, device_t, void *);
104 int uark_detach(device_t, int);
105 int uark_activate(device_t, enum devact);
106 extern struct cfdriver uark_cd;
107 CFATTACH_DECL_NEW(uark, sizeof(struct uark_softc), uark_match, uark_attach,
108 uark_detach, uark_activate);
109
110 int
111 uark_match(device_t parent, cfdata_t match, void *aux)
112 {
113 struct usb_attach_arg *uaa = aux;
114
115 return (usb_lookup(uark_devs, uaa->uaa_vendor, uaa->uaa_product)
116 != NULL) ? UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
117 }
118
119 void
120 uark_attach(device_t parent, device_t self, void *aux)
121 {
122 struct uark_softc *sc = device_private(self);
123 struct usb_attach_arg *uaa = aux;
124 struct usbd_device *dev = uaa->uaa_device;
125 char *devinfop;
126 struct ucom_attach_args ucaa;
127 usb_interface_descriptor_t *id;
128 usb_endpoint_descriptor_t *ed;
129 usbd_status error;
130 int i;
131
132 memset(&ucaa, 0, sizeof(ucaa));
133 sc->sc_dev = self;
134
135 devinfop = usbd_devinfo_alloc(dev, 0);
136 aprint_naive("\n");
137 aprint_normal("\n");
138 aprint_normal_dev(self, "%s\n", devinfop);
139 usbd_devinfo_free(devinfop);
140
141 sc->sc_udev = dev;
142
143 if (usbd_set_config_index(sc->sc_udev, UARK_CONFIG_NO, 1) != 0) {
144 aprint_error_dev(self, "could not set configuration no\n");
145 sc->sc_dying = 1;
146 return;
147 }
148
149 /* get the first interface handle */
150 error = usbd_device2interface_handle(sc->sc_udev, UARK_IFACE_NO,
151 &sc->sc_iface);
152 if (error != 0) {
153 aprint_error_dev(self, "could not get interface handle\n");
154 sc->sc_dying = 1;
155 return;
156 }
157
158 id = usbd_get_interface_descriptor(sc->sc_iface);
159
160 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1;
161 for (i = 0; i < id->bNumEndpoints; i++) {
162 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
163 if (ed == NULL) {
164 aprint_error_dev(self,
165 "no endpoint descriptor found for %d\n", i);
166 sc->sc_dying = 1;
167 return;
168 }
169
170 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
171 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
172 ucaa.ucaa_bulkin = ed->bEndpointAddress;
173 else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
174 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
175 ucaa.ucaa_bulkout = ed->bEndpointAddress;
176 }
177
178 if (ucaa.ucaa_bulkin == -1 || ucaa.ucaa_bulkout == -1) {
179 aprint_error_dev(self, "missing endpoint\n");
180 sc->sc_dying = 1;
181 return;
182 }
183
184 ucaa.ucaa_ibufsize = UARKBUFSZ;
185 ucaa.ucaa_obufsize = UARKBUFSZ;
186 ucaa.ucaa_ibufsizepad = UARKBUFSZ;
187 ucaa.ucaa_opkthdrlen = 0;
188 ucaa.ucaa_device = sc->sc_udev;
189 ucaa.ucaa_iface = sc->sc_iface;
190 ucaa.ucaa_methods = &uark_methods;
191 ucaa.ucaa_arg = sc;
192 ucaa.ucaa_info = NULL;
193
194 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev);
195
196 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &ucaa,
197 ucomprint, ucomsubmatch);
198
199 return;
200 }
201
202 int
203 uark_detach(device_t self, int flags)
204 {
205 struct uark_softc *sc = device_private(self);
206 int rv = 0;
207
208 sc->sc_dying = 1;
209 if (sc->sc_subdev != NULL) {
210 rv = config_detach(sc->sc_subdev, flags);
211 sc->sc_subdev = NULL;
212 }
213
214 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev);
215
216 return rv;
217 }
218
219 int
220 uark_activate(device_t self, enum devact act)
221 {
222 struct uark_softc *sc = device_private(self);
223 int rv = 0;
224
225 switch (act) {
226 case DVACT_DEACTIVATE:
227 if (sc->sc_subdev != NULL)
228 rv = config_deactivate(sc->sc_subdev);
229 sc->sc_dying = 1;
230 break;
231 }
232 return (rv);
233 }
234
235 void
236 uark_set(void *vsc, int portno, int reg, int onoff)
237 {
238 struct uark_softc *sc = vsc;
239
240 switch (reg) {
241 case UCOM_SET_BREAK:
242 uark_break(sc, portno, onoff);
243 return;
244 case UCOM_SET_DTR:
245 case UCOM_SET_RTS:
246 default:
247 return;
248 }
249 }
250
251 int
252 uark_param(void *vsc, int portno, struct termios *t)
253 {
254 struct uark_softc *sc = (struct uark_softc *)vsc;
255 int data;
256
257 switch (t->c_ospeed) {
258 case 300:
259 case 600:
260 case 1200:
261 case 1800:
262 case 2400:
263 case 4800:
264 case 9600:
265 case 19200:
266 case 38400:
267 case 57600:
268 case 115200:
269 uark_cmd(sc, 3, 0x83);
270 uark_cmd(sc, 0, (UARK_BAUD_REF / t->c_ospeed) & 0xFF);
271 uark_cmd(sc, 1, (UARK_BAUD_REF / t->c_ospeed) >> 8);
272 uark_cmd(sc, 3, 0x03);
273 break;
274 default:
275 return (EINVAL);
276 }
277
278 if (ISSET(t->c_cflag, CSTOPB))
279 data = UARK_STOP_BITS_2;
280 else
281 data = UARK_STOP_BITS_1;
282
283 if (ISSET(t->c_cflag, PARENB)) {
284 if (ISSET(t->c_cflag, PARODD))
285 data |= UARK_PARITY_ODD;
286 else
287 data |= UARK_PARITY_EVEN;
288 } else
289 data |= UARK_PARITY_NONE;
290
291 switch (ISSET(t->c_cflag, CSIZE)) {
292 case CS5:
293 data |= UARK_SET_DATA_BITS(5);
294 break;
295 case CS6:
296 data |= UARK_SET_DATA_BITS(6);
297 break;
298 case CS7:
299 data |= UARK_SET_DATA_BITS(7);
300 break;
301 case CS8:
302 data |= UARK_SET_DATA_BITS(8);
303 break;
304 }
305
306 uark_cmd(sc, 3, 0x00);
307 uark_cmd(sc, 3, data);
308
309 #if 0
310 /* XXX flow control */
311 if (ISSET(t->c_cflag, CRTSCTS))
312 /* rts/cts flow ctl */
313 } else if (ISSET(t->c_iflag, IXON|IXOFF)) {
314 /* xon/xoff flow ctl */
315 } else {
316 /* disable flow ctl */
317 }
318 #endif
319
320 return (0);
321 }
322
323 void
324 uark_get_status(void *vsc, int portno, u_char *lsr, u_char *msr)
325 {
326 struct uark_softc *sc = vsc;
327
328 if (msr != NULL)
329 *msr = sc->sc_msr;
330 if (lsr != NULL)
331 *lsr = sc->sc_lsr;
332 }
333
334 void
335 uark_break(void *vsc, int portno, int onoff)
336 {
337 #if 0
338 struct uark_softc *sc = vsc;
339
340 #ifdef UARK_DEBUG
341 aprint_normal_dev(sc->sc_dev, "break %s!\n", onoff ? "on" : "off");
342 #endif
343
344 if (onoff)
345 /* break on */
346 uark_cmd(sc, 4, 0x01);
347 else
348 uark_cmd(sc, 4, 0x00);
349 #endif
350 }
351
352 int
353 uark_cmd(struct uark_softc *sc, uint16_t index, uint16_t value)
354 {
355 usb_device_request_t req;
356 usbd_status err;
357
358 req.bmRequestType = UARK_WRITE;
359 req.bRequest = UARK_REQUEST;
360 USETW(req.wValue, value);
361 USETW(req.wIndex, index);
362 USETW(req.wLength, 0);
363 err = usbd_do_request(sc->sc_udev, &req, NULL);
364
365 if (err)
366 return (EIO);
367
368 return (0);
369 }
370