uark.c revision 1.17 1 /* $NetBSD: uark.c,v 1.17 2021/04/24 23:36:59 thorpej 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 1.17 2021/04/24 23:36:59 thorpej 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 bool sc_dying;
79 };
80
81 static void uark_get_status(void *, int portno, u_char *lsr, u_char *msr);
82 static void uark_set(void *, int, int, int);
83 static int uark_param(void *, int, struct termios *);
84 static int uark_open(void *, int);
85 static void uark_break(void *, int, int);
86 static int uark_cmd(struct uark_softc *, uint16_t, uint16_t);
87
88 static const struct ucom_methods uark_methods = {
89 .ucom_get_status = uark_get_status,
90 .ucom_set = uark_set,
91 .ucom_param = uark_param,
92 .ucom_open = uark_open,
93 };
94
95 static const struct usb_devno uark_devs[] = {
96 { USB_VENDOR_ARKMICROCHIPS, USB_PRODUCT_ARKMICROCHIPS_USBSERIAL },
97 };
98
99 static int uark_match(device_t, cfdata_t, void *);
100 static void uark_attach(device_t, device_t, void *);
101 static int uark_detach(device_t, int);
102
103 CFATTACH_DECL_NEW(uark, sizeof(struct uark_softc), uark_match, uark_attach,
104 uark_detach, NULL);
105
106 static int
107 uark_match(device_t parent, cfdata_t match, void *aux)
108 {
109 struct usb_attach_arg *uaa = aux;
110
111 return (usb_lookup(uark_devs, uaa->uaa_vendor, uaa->uaa_product)
112 != NULL) ? UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
113 }
114
115 static void
116 uark_attach(device_t parent, device_t self, void *aux)
117 {
118 struct uark_softc *sc = device_private(self);
119 struct usb_attach_arg *uaa = aux;
120 struct usbd_device *dev = uaa->uaa_device;
121 char *devinfop;
122 struct ucom_attach_args ucaa;
123 usb_interface_descriptor_t *id;
124 usb_endpoint_descriptor_t *ed;
125 usbd_status error;
126 int i;
127
128 memset(&ucaa, 0, sizeof(ucaa));
129 sc->sc_dev = self;
130
131 devinfop = usbd_devinfo_alloc(dev, 0);
132 aprint_naive("\n");
133 aprint_normal("\n");
134 aprint_normal_dev(self, "%s\n", devinfop);
135 usbd_devinfo_free(devinfop);
136
137 sc->sc_udev = dev;
138 sc->sc_dying = false;
139
140 if (usbd_set_config_index(sc->sc_udev, UARK_CONFIG_NO, 1) != 0) {
141 aprint_error_dev(self, "could not set configuration no\n");
142 sc->sc_dying = true;
143 return;
144 }
145
146 /* get the first interface handle */
147 error = usbd_device2interface_handle(sc->sc_udev, UARK_IFACE_NO,
148 &sc->sc_iface);
149 if (error != 0) {
150 aprint_error_dev(self, "could not get interface handle\n");
151 sc->sc_dying = true;
152 return;
153 }
154
155 id = usbd_get_interface_descriptor(sc->sc_iface);
156
157 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1;
158 for (i = 0; i < id->bNumEndpoints; i++) {
159 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
160 if (ed == NULL) {
161 aprint_error_dev(self,
162 "no endpoint descriptor found for %d\n", i);
163 sc->sc_dying = true;
164 return;
165 }
166
167 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
168 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
169 ucaa.ucaa_bulkin = ed->bEndpointAddress;
170 else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
171 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
172 ucaa.ucaa_bulkout = ed->bEndpointAddress;
173 }
174
175 if (ucaa.ucaa_bulkin == -1 || ucaa.ucaa_bulkout == -1) {
176 aprint_error_dev(self, "missing endpoint\n");
177 sc->sc_dying = true;
178 return;
179 }
180
181 ucaa.ucaa_ibufsize = UARKBUFSZ;
182 ucaa.ucaa_obufsize = UARKBUFSZ;
183 ucaa.ucaa_ibufsizepad = UARKBUFSZ;
184 ucaa.ucaa_opkthdrlen = 0;
185 ucaa.ucaa_device = sc->sc_udev;
186 ucaa.ucaa_iface = sc->sc_iface;
187 ucaa.ucaa_methods = &uark_methods;
188 ucaa.ucaa_arg = sc;
189 ucaa.ucaa_info = NULL;
190
191 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev);
192
193 sc->sc_subdev = config_found(self, &ucaa, ucomprint,
194 CFARG_SUBMATCH, ucomsubmatch,
195 CFARG_EOL);
196
197 return;
198 }
199
200 static int
201 uark_detach(device_t self, int flags)
202 {
203 struct uark_softc *sc = device_private(self);
204 int rv = 0;
205
206 sc->sc_dying = true;
207
208 if (sc->sc_subdev != NULL) {
209 rv = config_detach(sc->sc_subdev, flags);
210 sc->sc_subdev = NULL;
211 }
212
213 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev);
214
215 return rv;
216 }
217
218 static void
219 uark_set(void *vsc, int portno, int reg, int onoff)
220 {
221 struct uark_softc *sc = vsc;
222
223 if (sc->sc_dying)
224 return;
225
226 switch (reg) {
227 case UCOM_SET_BREAK:
228 uark_break(sc, portno, onoff);
229 return;
230 case UCOM_SET_DTR:
231 case UCOM_SET_RTS:
232 default:
233 return;
234 }
235 }
236
237 static int
238 uark_param(void *vsc, int portno, struct termios *t)
239 {
240 struct uark_softc *sc = (struct uark_softc *)vsc;
241 int data;
242
243 if (sc->sc_dying)
244 return EIO;
245
246 switch (t->c_ospeed) {
247 case 300:
248 case 600:
249 case 1200:
250 case 1800:
251 case 2400:
252 case 4800:
253 case 9600:
254 case 19200:
255 case 38400:
256 case 57600:
257 case 115200:
258 uark_cmd(sc, 3, 0x83);
259 uark_cmd(sc, 0, (UARK_BAUD_REF / t->c_ospeed) & 0xFF);
260 uark_cmd(sc, 1, (UARK_BAUD_REF / t->c_ospeed) >> 8);
261 uark_cmd(sc, 3, 0x03);
262 break;
263 default:
264 return EINVAL;
265 }
266
267 if (ISSET(t->c_cflag, CSTOPB))
268 data = UARK_STOP_BITS_2;
269 else
270 data = UARK_STOP_BITS_1;
271
272 if (ISSET(t->c_cflag, PARENB)) {
273 if (ISSET(t->c_cflag, PARODD))
274 data |= UARK_PARITY_ODD;
275 else
276 data |= UARK_PARITY_EVEN;
277 } else
278 data |= UARK_PARITY_NONE;
279
280 switch (ISSET(t->c_cflag, CSIZE)) {
281 case CS5:
282 data |= UARK_SET_DATA_BITS(5);
283 break;
284 case CS6:
285 data |= UARK_SET_DATA_BITS(6);
286 break;
287 case CS7:
288 data |= UARK_SET_DATA_BITS(7);
289 break;
290 case CS8:
291 data |= UARK_SET_DATA_BITS(8);
292 break;
293 }
294
295 uark_cmd(sc, 3, 0x00);
296 uark_cmd(sc, 3, data);
297
298 #if 0
299 /* XXX flow control */
300 if (ISSET(t->c_cflag, CRTSCTS)) {
301 /* rts/cts flow ctl */
302 } else if (ISSET(t->c_iflag, IXON|IXOFF)) {
303 /* xon/xoff flow ctl */
304 } else {
305 /* disable flow ctl */
306 }
307 #endif
308
309 return 0;
310 }
311
312 static int
313 uark_open(void *arg, int portno)
314 {
315 struct uark_softc *sc = arg;
316
317 if (sc->sc_dying)
318 return EIO;
319
320 return 0;
321 }
322
323 static 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 (sc->sc_dying)
329 return;
330
331 *msr = sc->sc_msr;
332 *lsr = sc->sc_lsr;
333 }
334
335 static void
336 uark_break(void *vsc, int portno, int onoff)
337 {
338 #if 0
339 struct uark_softc *sc = vsc;
340
341 if (sc->sc_dying)
342 return;
343
344 #ifdef UARK_DEBUG
345 aprint_normal_dev(sc->sc_dev, "break %s!\n", onoff ? "on" : "off");
346 #endif
347
348 if (onoff)
349 /* break on */
350 uark_cmd(sc, 4, 0x01);
351 else
352 uark_cmd(sc, 4, 0x00);
353 #endif
354 }
355
356 static int
357 uark_cmd(struct uark_softc *sc, uint16_t index, uint16_t value)
358 {
359 usb_device_request_t req;
360 usbd_status err;
361
362 req.bmRequestType = UARK_WRITE;
363 req.bRequest = UARK_REQUEST;
364 USETW(req.wValue, value);
365 USETW(req.wIndex, index);
366 USETW(req.wLength, 0);
367 err = usbd_do_request(sc->sc_udev, &req, NULL);
368
369 if (err)
370 return EIO;
371
372 return 0;
373 }
374