1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/stat.h> /* ddi_create_minor_node S_IFCHR */
27 #include <sys/modctl.h> /* for modldrv */
28 #include <sys/open.h> /* for open params. */
29 #include <sys/types.h>
30 #include <sys/kmem.h>
31 #include <sys/sunddi.h>
32 #include <sys/conf.h> /* req. by dev_ops flags MTSAFE etc. */
33 #include <sys/ddi.h>
34 #include <sys/file.h>
35 #include <sys/note.h>
36
37 #include <sys/i2c/clients/pic16f819_impl.h>
38
39 static void *pic16f819soft_statep;
40
41 static int pic16f819_set(struct pic16f819_unit *, int, uchar_t);
42 static int pic16f819_get(struct pic16f819_unit *, int, uchar_t *, int);
43
44
45 static int pic16f819_do_attach(dev_info_t *);
46 static int pic16f819_do_detach(dev_info_t *);
47 static int pic16f819_do_resume(void);
48 static int pic16f819_do_suspend(void);
49
50 /*
51 * cb ops (only need ioctl)
52 */
53 static int pic16f819_open(dev_t *, int, int, cred_t *);
54 static int pic16f819_close(dev_t, int, int, cred_t *);
55 static int pic16f819_ioctl(dev_t, int, intptr_t, int, cred_t *, int *);
56
57 static struct cb_ops pic16f819_cbops = {
58 pic16f819_open, /* open */
59 pic16f819_close, /* close */
60 nodev, /* strategy */
61 nodev, /* print */
62 nodev, /* dump */
63 nodev, /* read */
64 nodev, /* write */
65 pic16f819_ioctl, /* ioctl */
66 nodev, /* devmap */
67 nodev, /* mmap */
68 nodev, /* segmap */
69 nochpoll, /* poll */
70 ddi_prop_op, /* cb_prop_op */
71 NULL, /* streamtab */
72 D_NEW | D_MP | D_HOTPLUG, /* Driver compatibility flag */
73 CB_REV, /* rev */
74 nodev, /* int (*cb_aread)() */
75 nodev /* int (*cb_awrite)() */
76 };
77
78 /*
79 * dev ops
80 */
81 static int pic16f819_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
82 static int pic16f819_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
83
84 static struct dev_ops pic16f819_ops = {
85 DEVO_REV,
86 0,
87 ddi_no_info,
88 nulldev,
89 nulldev,
90 pic16f819_attach,
91 pic16f819_detach,
92 nodev,
93 &pic16f819_cbops,
94 NULL, /* bus ops */
95 NULL, /* power */
96 ddi_quiesce_not_needed, /* quiesce */
97 };
98
99 extern struct mod_ops mod_driverops;
100
101 static struct modldrv pic16f819_modldrv = {
102 &mod_driverops, /* type of module - driver */
103 "PIC16F819 i2c device driver",
104 &pic16f819_ops
105 };
106
107 static struct modlinkage pic16f819_modlinkage = {
108 MODREV_1,
109 &pic16f819_modldrv,
110 0
111 };
112
113
114 int
_init(void)115 _init(void)
116 {
117 int error;
118
119 error = mod_install(&pic16f819_modlinkage);
120
121 if (!error)
122 (void) ddi_soft_state_init(&pic16f819soft_statep,
123 sizeof (struct pic16f819_unit), 1);
124 return (error);
125 }
126
127 int
_fini(void)128 _fini(void)
129 {
130 int error;
131
132 error = mod_remove(&pic16f819_modlinkage);
133 if (!error)
134 ddi_soft_state_fini(&pic16f819soft_statep);
135
136 return (error);
137 }
138
139 int
_info(struct modinfo * modinfop)140 _info(struct modinfo *modinfop)
141 {
142 return (mod_info(&pic16f819_modlinkage, modinfop));
143 }
144
145 static int
pic16f819_get(struct pic16f819_unit * unitp,int reg,uchar_t * byte,int flags)146 pic16f819_get(struct pic16f819_unit *unitp, int reg, uchar_t *byte, int flags)
147 {
148 i2c_transfer_t *i2c_tran_pointer;
149 int err;
150
151 (void) i2c_transfer_alloc(unitp->pic16f819_hdl, &i2c_tran_pointer,
152 1, 1, flags);
153 if (i2c_tran_pointer == NULL) {
154 return (ENOMEM);
155 }
156
157 i2c_tran_pointer->i2c_flags = I2C_WR_RD;
158 i2c_tran_pointer->i2c_wbuf[0] = (uchar_t)reg;
159 err = i2c_transfer(unitp->pic16f819_hdl, i2c_tran_pointer);
160 if (err) {
161 D2CMN_ERR((CE_WARN, "%s: pic16f819_get failed reg=%x",
162 unitp->pic16f819_name, reg));
163 } else {
164 *byte = i2c_tran_pointer->i2c_rbuf[0];
165 }
166
167 i2c_transfer_free(unitp->pic16f819_hdl, i2c_tran_pointer);
168 return (err);
169 }
170
171 static int
pic16f819_set(struct pic16f819_unit * unitp,int reg,uchar_t byte)172 pic16f819_set(struct pic16f819_unit *unitp, int reg, uchar_t byte)
173 {
174 i2c_transfer_t *i2c_tran_pointer;
175 int err;
176
177 (void) i2c_transfer_alloc(unitp->pic16f819_hdl, &i2c_tran_pointer,
178 2, 0, I2C_SLEEP);
179 if (i2c_tran_pointer == NULL) {
180 D2CMN_ERR((CE_WARN, "%s: Failed in pic16f819_set "
181 "i2c_tran_pointer not allocated", unitp->pic16f819_name));
182 return (ENOMEM);
183 }
184
185 i2c_tran_pointer->i2c_flags = I2C_WR;
186 i2c_tran_pointer->i2c_wbuf[0] = (uchar_t)reg;
187 i2c_tran_pointer->i2c_wbuf[1] = byte;
188 D1CMN_ERR((CE_NOTE, "%s: set reg %x to %x",
189 unitp->pic16f819_name, reg, byte));
190
191 err = i2c_transfer(unitp->pic16f819_hdl, i2c_tran_pointer);
192 if (err) {
193 D2CMN_ERR((CE_WARN, "%s: Failed in the pic16f819_set"
194 " i2c_transfer routine", unitp->pic16f819_name));
195 }
196 i2c_transfer_free(unitp->pic16f819_hdl, i2c_tran_pointer);
197 return (err);
198 }
199
200 static int
pic16f819_open(dev_t * devp,int flags,int otyp,cred_t * credp)201 pic16f819_open(dev_t *devp, int flags, int otyp, cred_t *credp)
202 {
203 _NOTE(ARGUNUSED(credp))
204
205 struct pic16f819_unit *unitp;
206 int instance;
207 int error = 0;
208
209 instance = getminor(*devp);
210
211 if (instance < 0) {
212 return (ENXIO);
213 }
214
215 unitp = (struct pic16f819_unit *)
216 ddi_get_soft_state(pic16f819soft_statep, instance);
217
218 if (unitp == NULL) {
219 return (ENXIO);
220 }
221
222 if (otyp != OTYP_CHR) {
223 return (EINVAL);
224 }
225
226 mutex_enter(&unitp->pic16f819_mutex);
227
228 if (flags & FEXCL) {
229 if (unitp->pic16f819_oflag != 0) {
230 error = EBUSY;
231 } else {
232 unitp->pic16f819_oflag = FEXCL;
233 }
234 } else {
235 if (unitp->pic16f819_oflag == FEXCL) {
236 error = EBUSY;
237 } else {
238 unitp->pic16f819_oflag = FOPEN;
239 }
240 }
241
242 mutex_exit(&unitp->pic16f819_mutex);
243
244 return (error);
245 }
246
247 static int
pic16f819_close(dev_t dev,int flags,int otyp,cred_t * credp)248 pic16f819_close(dev_t dev, int flags, int otyp, cred_t *credp)
249 {
250 _NOTE(ARGUNUSED(flags, otyp, credp))
251
252 struct pic16f819_unit *unitp;
253 int instance;
254
255 instance = getminor(dev);
256
257 if (instance < 0) {
258 return (ENXIO);
259 }
260
261 unitp = (struct pic16f819_unit *)
262 ddi_get_soft_state(pic16f819soft_statep, instance);
263
264 if (unitp == NULL) {
265 return (ENXIO);
266 }
267
268 mutex_enter(&unitp->pic16f819_mutex);
269
270 unitp->pic16f819_oflag = 0;
271
272 mutex_exit(&unitp->pic16f819_mutex);
273 return (DDI_SUCCESS);
274 }
275
276 static int
pic16f819_ioctl(dev_t dev,int cmd,intptr_t arg,int mode,cred_t * credp,int * rvalp)277 pic16f819_ioctl(dev_t dev, int cmd, intptr_t arg, int mode,
278 cred_t *credp, int *rvalp)
279 {
280 _NOTE(ARGUNUSED(credp, rvalp))
281
282 struct pic16f819_unit *unitp;
283 int instance;
284 int err = 0;
285 i2c_reg_t ioctl_reg;
286 uchar_t val8;
287
288 if (arg == NULL) {
289 D2CMN_ERR((CE_WARN, "PIC16F819: ioctl: arg passed in to ioctl "
290 "= NULL\n"));
291 err = EINVAL;
292 return (err);
293 }
294 instance = getminor(dev);
295 unitp = (struct pic16f819_unit *)
296 ddi_get_soft_state(pic16f819soft_statep, instance);
297
298 mutex_enter(&unitp->pic16f819_mutex);
299
300 switch (cmd) {
301
302 case I2C_GET_REG:
303 if (ddi_copyin((caddr_t)arg, (caddr_t)&ioctl_reg,
304 sizeof (i2c_reg_t), mode) != DDI_SUCCESS) {
305 err = EFAULT;
306 break;
307 }
308 err = pic16f819_get(unitp, ioctl_reg.reg_num, &val8,
309 I2C_SLEEP);
310 if (err != I2C_SUCCESS) {
311 break;
312 }
313
314 ioctl_reg.reg_value = val8;
315 if (ddi_copyout((caddr_t)&ioctl_reg, (caddr_t)arg,
316 sizeof (i2c_reg_t), mode) != DDI_SUCCESS) {
317 err = EFAULT;
318 }
319 break;
320
321 case I2C_SET_REG:
322 if (ddi_copyin((caddr_t)arg, (caddr_t)&ioctl_reg,
323 sizeof (i2c_reg_t), mode) != DDI_SUCCESS) {
324 err = EFAULT;
325 break;
326 }
327 err = pic16f819_set(unitp, ioctl_reg.reg_num,
328 ioctl_reg.reg_value);
329 break;
330 default:
331 D2CMN_ERR((CE_WARN, "%s: Invalid IOCTL cmd: %x\n",
332 unitp->pic16f819_name, cmd));
333 err = EINVAL;
334 }
335
336 mutex_exit(&unitp->pic16f819_mutex);
337 return (err);
338 }
339
340 static int
pic16f819_attach(dev_info_t * dip,ddi_attach_cmd_t cmd)341 pic16f819_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
342 {
343 switch (cmd) {
344 case DDI_ATTACH:
345 return (pic16f819_do_attach(dip));
346 case DDI_RESUME:
347 return (pic16f819_do_resume());
348 default:
349 return (DDI_FAILURE);
350 }
351 }
352
353 static int
pic16f819_detach(dev_info_t * dip,ddi_detach_cmd_t cmd)354 pic16f819_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
355 {
356 switch (cmd) {
357 case DDI_DETACH:
358 return (pic16f819_do_detach(dip));
359 case DDI_SUSPEND:
360 return (pic16f819_do_suspend());
361 default:
362 return (DDI_FAILURE);
363 }
364 }
365
366 static int
pic16f819_do_attach(dev_info_t * dip)367 pic16f819_do_attach(dev_info_t *dip)
368 {
369 struct pic16f819_unit *unitp;
370 int instance;
371
372 instance = ddi_get_instance(dip);
373
374 if (ddi_soft_state_zalloc(pic16f819soft_statep, instance) != 0) {
375 cmn_err(CE_WARN, "%s%d: failed to zalloc softstate\n",
376 ddi_get_name(dip), instance);
377 return (DDI_FAILURE);
378 }
379
380 unitp = ddi_get_soft_state(pic16f819soft_statep, instance);
381
382 if (unitp == NULL) {
383 cmn_err(CE_WARN, "%s%d: unitp not filled\n",
384 ddi_get_name(dip), instance);
385 return (ENOMEM);
386 }
387
388 (void) snprintf(unitp->pic16f819_name, sizeof (unitp->pic16f819_name),
389 "%s%d", ddi_node_name(dip), instance);
390
391 if (ddi_create_minor_node(dip, "fan_1", S_IFCHR, instance,
392 "ddi_i2c:pic", NULL) == DDI_FAILURE) {
393 cmn_err(CE_WARN, "%s ddi_create_minor_node failed for "
394 "%s\n", unitp->pic16f819_name, "pic16f819");
395 ddi_soft_state_free(pic16f819soft_statep, instance);
396
397 return (DDI_FAILURE);
398 }
399
400 if (i2c_client_register(dip, &unitp->pic16f819_hdl) != I2C_SUCCESS) {
401 cmn_err(CE_WARN, "%s i2c_client_register failed\n",
402 unitp->pic16f819_name);
403 ddi_remove_minor_node(dip, NULL);
404 ddi_soft_state_free(pic16f819soft_statep, instance);
405
406 return (DDI_FAILURE);
407 }
408
409 mutex_init(&unitp->pic16f819_mutex, NULL, MUTEX_DRIVER, NULL);
410
411 return (DDI_SUCCESS);
412 }
413
414 static int
pic16f819_do_resume()415 pic16f819_do_resume()
416 {
417 int ret = DDI_SUCCESS;
418
419 return (ret);
420 }
421
422 static int
pic16f819_do_suspend()423 pic16f819_do_suspend()
424 {
425 int ret = DDI_SUCCESS;
426
427 return (ret);
428 }
429
430 static int
pic16f819_do_detach(dev_info_t * dip)431 pic16f819_do_detach(dev_info_t *dip)
432 {
433 struct pic16f819_unit *unitp;
434 int instance;
435
436 instance = ddi_get_instance(dip);
437
438 unitp = ddi_get_soft_state(pic16f819soft_statep, instance);
439
440 if (unitp == NULL) {
441 cmn_err(CE_WARN, "%s%d: unitp not filled\n",
442 ddi_get_name(dip), instance);
443 return (ENOMEM);
444 }
445
446 i2c_client_unregister(unitp->pic16f819_hdl);
447
448 ddi_remove_minor_node(dip, NULL);
449
450 mutex_destroy(&unitp->pic16f819_mutex);
451
452 ddi_soft_state_free(pic16f819soft_statep, instance);
453
454 return (DDI_SUCCESS);
455 }
456