Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/net/ieee802154/at86rf230.c

  1 /*
  2  * AT86RF230/RF231 driver
  3  *
  4  * Copyright (C) 2009-2012 Siemens AG
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License version 2
  8  * as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License along
 16  * with this program; if not, write to the Free Software Foundation, Inc.,
 17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Written by:
 20  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 21  * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 22  */
 23 #include <linux/kernel.h>
 24 #include <linux/module.h>
 25 #include <linux/interrupt.h>
 26 #include <linux/irq.h>
 27 #include <linux/gpio.h>
 28 #include <linux/delay.h>
 29 #include <linux/mutex.h>
 30 #include <linux/workqueue.h>
 31 #include <linux/spinlock.h>
 32 #include <linux/spi/spi.h>
 33 #include <linux/spi/at86rf230.h>
 34 #include <linux/skbuff.h>
 35 #include <linux/of_gpio.h>
 36 
 37 #include <net/mac802154.h>
 38 #include <net/wpan-phy.h>
 39 
 40 struct at86rf230_local {
 41         struct spi_device *spi;
 42 
 43         u8 part;
 44         u8 vers;
 45 
 46         u8 buf[2];
 47         struct mutex bmux;
 48 
 49         struct work_struct irqwork;
 50         struct completion tx_complete;
 51 
 52         struct ieee802154_dev *dev;
 53 
 54         spinlock_t lock;
 55         bool irq_busy;
 56         bool is_tx;
 57         bool tx_aret;
 58 
 59         int rssi_base_val;
 60 };
 61 
 62 static bool is_rf212(struct at86rf230_local *local)
 63 {
 64         return local->part == 7;
 65 }
 66 
 67 #define RG_TRX_STATUS   (0x01)
 68 #define SR_TRX_STATUS           0x01, 0x1f, 0
 69 #define SR_RESERVED_01_3        0x01, 0x20, 5
 70 #define SR_CCA_STATUS           0x01, 0x40, 6
 71 #define SR_CCA_DONE             0x01, 0x80, 7
 72 #define RG_TRX_STATE    (0x02)
 73 #define SR_TRX_CMD              0x02, 0x1f, 0
 74 #define SR_TRAC_STATUS          0x02, 0xe0, 5
 75 #define RG_TRX_CTRL_0   (0x03)
 76 #define SR_CLKM_CTRL            0x03, 0x07, 0
 77 #define SR_CLKM_SHA_SEL         0x03, 0x08, 3
 78 #define SR_PAD_IO_CLKM          0x03, 0x30, 4
 79 #define SR_PAD_IO               0x03, 0xc0, 6
 80 #define RG_TRX_CTRL_1   (0x04)
 81 #define SR_IRQ_POLARITY         0x04, 0x01, 0
 82 #define SR_IRQ_MASK_MODE        0x04, 0x02, 1
 83 #define SR_SPI_CMD_MODE         0x04, 0x0c, 2
 84 #define SR_RX_BL_CTRL           0x04, 0x10, 4
 85 #define SR_TX_AUTO_CRC_ON       0x04, 0x20, 5
 86 #define SR_IRQ_2_EXT_EN         0x04, 0x40, 6
 87 #define SR_PA_EXT_EN            0x04, 0x80, 7
 88 #define RG_PHY_TX_PWR   (0x05)
 89 #define SR_TX_PWR               0x05, 0x0f, 0
 90 #define SR_PA_LT                0x05, 0x30, 4
 91 #define SR_PA_BUF_LT            0x05, 0xc0, 6
 92 #define RG_PHY_RSSI     (0x06)
 93 #define SR_RSSI                 0x06, 0x1f, 0
 94 #define SR_RND_VALUE            0x06, 0x60, 5
 95 #define SR_RX_CRC_VALID         0x06, 0x80, 7
 96 #define RG_PHY_ED_LEVEL (0x07)
 97 #define SR_ED_LEVEL             0x07, 0xff, 0
 98 #define RG_PHY_CC_CCA   (0x08)
 99 #define SR_CHANNEL              0x08, 0x1f, 0
100 #define SR_CCA_MODE             0x08, 0x60, 5
101 #define SR_CCA_REQUEST          0x08, 0x80, 7
102 #define RG_CCA_THRES    (0x09)
103 #define SR_CCA_ED_THRES         0x09, 0x0f, 0
104 #define SR_RESERVED_09_1        0x09, 0xf0, 4
105 #define RG_RX_CTRL      (0x0a)
106 #define SR_PDT_THRES            0x0a, 0x0f, 0
107 #define SR_RESERVED_0a_1        0x0a, 0xf0, 4
108 #define RG_SFD_VALUE    (0x0b)
109 #define SR_SFD_VALUE            0x0b, 0xff, 0
110 #define RG_TRX_CTRL_2   (0x0c)
111 #define SR_OQPSK_DATA_RATE      0x0c, 0x03, 0
112 #define SR_SUB_MODE             0x0c, 0x04, 2
113 #define SR_BPSK_QPSK            0x0c, 0x08, 3
114 #define SR_OQPSK_SUB1_RC_EN     0x0c, 0x10, 4
115 #define SR_RESERVED_0c_5        0x0c, 0x60, 5
116 #define SR_RX_SAFE_MODE         0x0c, 0x80, 7
117 #define RG_ANT_DIV      (0x0d)
118 #define SR_ANT_CTRL             0x0d, 0x03, 0
119 #define SR_ANT_EXT_SW_EN        0x0d, 0x04, 2
120 #define SR_ANT_DIV_EN           0x0d, 0x08, 3
121 #define SR_RESERVED_0d_2        0x0d, 0x70, 4
122 #define SR_ANT_SEL              0x0d, 0x80, 7
123 #define RG_IRQ_MASK     (0x0e)
124 #define SR_IRQ_MASK             0x0e, 0xff, 0
125 #define RG_IRQ_STATUS   (0x0f)
126 #define SR_IRQ_0_PLL_LOCK       0x0f, 0x01, 0
127 #define SR_IRQ_1_PLL_UNLOCK     0x0f, 0x02, 1
128 #define SR_IRQ_2_RX_START       0x0f, 0x04, 2
129 #define SR_IRQ_3_TRX_END        0x0f, 0x08, 3
130 #define SR_IRQ_4_CCA_ED_DONE    0x0f, 0x10, 4
131 #define SR_IRQ_5_AMI            0x0f, 0x20, 5
132 #define SR_IRQ_6_TRX_UR         0x0f, 0x40, 6
133 #define SR_IRQ_7_BAT_LOW        0x0f, 0x80, 7
134 #define RG_VREG_CTRL    (0x10)
135 #define SR_RESERVED_10_6        0x10, 0x03, 0
136 #define SR_DVDD_OK              0x10, 0x04, 2
137 #define SR_DVREG_EXT            0x10, 0x08, 3
138 #define SR_RESERVED_10_3        0x10, 0x30, 4
139 #define SR_AVDD_OK              0x10, 0x40, 6
140 #define SR_AVREG_EXT            0x10, 0x80, 7
141 #define RG_BATMON       (0x11)
142 #define SR_BATMON_VTH           0x11, 0x0f, 0
143 #define SR_BATMON_HR            0x11, 0x10, 4
144 #define SR_BATMON_OK            0x11, 0x20, 5
145 #define SR_RESERVED_11_1        0x11, 0xc0, 6
146 #define RG_XOSC_CTRL    (0x12)
147 #define SR_XTAL_TRIM            0x12, 0x0f, 0
148 #define SR_XTAL_MODE            0x12, 0xf0, 4
149 #define RG_RX_SYN       (0x15)
150 #define SR_RX_PDT_LEVEL         0x15, 0x0f, 0
151 #define SR_RESERVED_15_2        0x15, 0x70, 4
152 #define SR_RX_PDT_DIS           0x15, 0x80, 7
153 #define RG_XAH_CTRL_1   (0x17)
154 #define SR_RESERVED_17_8        0x17, 0x01, 0
155 #define SR_AACK_PROM_MODE       0x17, 0x02, 1
156 #define SR_AACK_ACK_TIME        0x17, 0x04, 2
157 #define SR_RESERVED_17_5        0x17, 0x08, 3
158 #define SR_AACK_UPLD_RES_FT     0x17, 0x10, 4
159 #define SR_AACK_FLTR_RES_FT     0x17, 0x20, 5
160 #define SR_CSMA_LBT_MODE        0x17, 0x40, 6
161 #define SR_RESERVED_17_1        0x17, 0x80, 7
162 #define RG_FTN_CTRL     (0x18)
163 #define SR_RESERVED_18_2        0x18, 0x7f, 0
164 #define SR_FTN_START            0x18, 0x80, 7
165 #define RG_PLL_CF       (0x1a)
166 #define SR_RESERVED_1a_2        0x1a, 0x7f, 0
167 #define SR_PLL_CF_START         0x1a, 0x80, 7
168 #define RG_PLL_DCU      (0x1b)
169 #define SR_RESERVED_1b_3        0x1b, 0x3f, 0
170 #define SR_RESERVED_1b_2        0x1b, 0x40, 6
171 #define SR_PLL_DCU_START        0x1b, 0x80, 7
172 #define RG_PART_NUM     (0x1c)
173 #define SR_PART_NUM             0x1c, 0xff, 0
174 #define RG_VERSION_NUM  (0x1d)
175 #define SR_VERSION_NUM          0x1d, 0xff, 0
176 #define RG_MAN_ID_0     (0x1e)
177 #define SR_MAN_ID_0             0x1e, 0xff, 0
178 #define RG_MAN_ID_1     (0x1f)
179 #define SR_MAN_ID_1             0x1f, 0xff, 0
180 #define RG_SHORT_ADDR_0 (0x20)
181 #define SR_SHORT_ADDR_0         0x20, 0xff, 0
182 #define RG_SHORT_ADDR_1 (0x21)
183 #define SR_SHORT_ADDR_1         0x21, 0xff, 0
184 #define RG_PAN_ID_0     (0x22)
185 #define SR_PAN_ID_0             0x22, 0xff, 0
186 #define RG_PAN_ID_1     (0x23)
187 #define SR_PAN_ID_1             0x23, 0xff, 0
188 #define RG_IEEE_ADDR_0  (0x24)
189 #define SR_IEEE_ADDR_0          0x24, 0xff, 0
190 #define RG_IEEE_ADDR_1  (0x25)
191 #define SR_IEEE_ADDR_1          0x25, 0xff, 0
192 #define RG_IEEE_ADDR_2  (0x26)
193 #define SR_IEEE_ADDR_2          0x26, 0xff, 0
194 #define RG_IEEE_ADDR_3  (0x27)
195 #define SR_IEEE_ADDR_3          0x27, 0xff, 0
196 #define RG_IEEE_ADDR_4  (0x28)
197 #define SR_IEEE_ADDR_4          0x28, 0xff, 0
198 #define RG_IEEE_ADDR_5  (0x29)
199 #define SR_IEEE_ADDR_5          0x29, 0xff, 0
200 #define RG_IEEE_ADDR_6  (0x2a)
201 #define SR_IEEE_ADDR_6          0x2a, 0xff, 0
202 #define RG_IEEE_ADDR_7  (0x2b)
203 #define SR_IEEE_ADDR_7          0x2b, 0xff, 0
204 #define RG_XAH_CTRL_0   (0x2c)
205 #define SR_SLOTTED_OPERATION    0x2c, 0x01, 0
206 #define SR_MAX_CSMA_RETRIES     0x2c, 0x0e, 1
207 #define SR_MAX_FRAME_RETRIES    0x2c, 0xf0, 4
208 #define RG_CSMA_SEED_0  (0x2d)
209 #define SR_CSMA_SEED_0          0x2d, 0xff, 0
210 #define RG_CSMA_SEED_1  (0x2e)
211 #define SR_CSMA_SEED_1          0x2e, 0x07, 0
212 #define SR_AACK_I_AM_COORD      0x2e, 0x08, 3
213 #define SR_AACK_DIS_ACK         0x2e, 0x10, 4
214 #define SR_AACK_SET_PD          0x2e, 0x20, 5
215 #define SR_AACK_FVN_MODE        0x2e, 0xc0, 6
216 #define RG_CSMA_BE      (0x2f)
217 #define SR_MIN_BE               0x2f, 0x0f, 0
218 #define SR_MAX_BE               0x2f, 0xf0, 4
219 
220 #define CMD_REG         0x80
221 #define CMD_REG_MASK    0x3f
222 #define CMD_WRITE       0x40
223 #define CMD_FB          0x20
224 
225 #define IRQ_BAT_LOW     (1 << 7)
226 #define IRQ_TRX_UR      (1 << 6)
227 #define IRQ_AMI         (1 << 5)
228 #define IRQ_CCA_ED      (1 << 4)
229 #define IRQ_TRX_END     (1 << 3)
230 #define IRQ_RX_START    (1 << 2)
231 #define IRQ_PLL_UNL     (1 << 1)
232 #define IRQ_PLL_LOCK    (1 << 0)
233 
234 #define IRQ_ACTIVE_HIGH 0
235 #define IRQ_ACTIVE_LOW  1
236 
237 #define STATE_P_ON              0x00    /* BUSY */
238 #define STATE_BUSY_RX           0x01
239 #define STATE_BUSY_TX           0x02
240 #define STATE_FORCE_TRX_OFF     0x03
241 #define STATE_FORCE_TX_ON       0x04    /* IDLE */
242 /* 0x05 */                              /* INVALID_PARAMETER */
243 #define STATE_RX_ON             0x06
244 /* 0x07 */                              /* SUCCESS */
245 #define STATE_TRX_OFF           0x08
246 #define STATE_TX_ON             0x09
247 /* 0x0a - 0x0e */                       /* 0x0a - UNSUPPORTED_ATTRIBUTE */
248 #define STATE_SLEEP             0x0F
249 #define STATE_PREP_DEEP_SLEEP   0x10
250 #define STATE_BUSY_RX_AACK      0x11
251 #define STATE_BUSY_TX_ARET      0x12
252 #define STATE_RX_AACK_ON        0x16
253 #define STATE_TX_ARET_ON        0x19
254 #define STATE_RX_ON_NOCLK       0x1C
255 #define STATE_RX_AACK_ON_NOCLK  0x1D
256 #define STATE_BUSY_RX_AACK_NOCLK 0x1E
257 #define STATE_TRANSITION_IN_PROGRESS 0x1F
258 
259 static int
260 __at86rf230_detect_device(struct spi_device *spi, u16 *man_id, u8 *part,
261                 u8 *version)
262 {
263         u8 data[4];
264         u8 *buf = kmalloc(2, GFP_KERNEL);
265         int status;
266         struct spi_message msg;
267         struct spi_transfer xfer = {
268                 .len    = 2,
269                 .tx_buf = buf,
270                 .rx_buf = buf,
271         };
272         u8 reg;
273 
274         if (!buf)
275                 return -ENOMEM;
276 
277         for (reg = RG_PART_NUM; reg <= RG_MAN_ID_1; reg++) {
278                 buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
279                 buf[1] = 0xff;
280                 dev_vdbg(&spi->dev, "buf[0] = %02x\n", buf[0]);
281                 spi_message_init(&msg);
282                 spi_message_add_tail(&xfer, &msg);
283 
284                 status = spi_sync(spi, &msg);
285                 dev_vdbg(&spi->dev, "status = %d\n", status);
286                 if (msg.status)
287                         status = msg.status;
288 
289                 dev_vdbg(&spi->dev, "status = %d\n", status);
290                 dev_vdbg(&spi->dev, "buf[0] = %02x\n", buf[0]);
291                 dev_vdbg(&spi->dev, "buf[1] = %02x\n", buf[1]);
292 
293                 if (status == 0)
294                         data[reg - RG_PART_NUM] = buf[1];
295                 else
296                         break;
297         }
298 
299         if (status == 0) {
300                 *part = data[0];
301                 *version = data[1];
302                 *man_id = (data[3] << 8) | data[2];
303         }
304 
305         kfree(buf);
306 
307         return status;
308 }
309 
310 static int
311 __at86rf230_write(struct at86rf230_local *lp, u8 addr, u8 data)
312 {
313         u8 *buf = lp->buf;
314         int status;
315         struct spi_message msg;
316         struct spi_transfer xfer = {
317                 .len    = 2,
318                 .tx_buf = buf,
319         };
320 
321         buf[0] = (addr & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
322         buf[1] = data;
323         dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
324         dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
325         spi_message_init(&msg);
326         spi_message_add_tail(&xfer, &msg);
327 
328         status = spi_sync(lp->spi, &msg);
329         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
330         if (msg.status)
331                 status = msg.status;
332 
333         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
334         dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
335         dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
336 
337         return status;
338 }
339 
340 static int
341 __at86rf230_read_subreg(struct at86rf230_local *lp,
342                         u8 addr, u8 mask, int shift, u8 *data)
343 {
344         u8 *buf = lp->buf;
345         int status;
346         struct spi_message msg;
347         struct spi_transfer xfer = {
348                 .len    = 2,
349                 .tx_buf = buf,
350                 .rx_buf = buf,
351         };
352 
353         buf[0] = (addr & CMD_REG_MASK) | CMD_REG;
354         buf[1] = 0xff;
355         dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
356         spi_message_init(&msg);
357         spi_message_add_tail(&xfer, &msg);
358 
359         status = spi_sync(lp->spi, &msg);
360         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
361         if (msg.status)
362                 status = msg.status;
363 
364         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
365         dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
366         dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
367 
368         if (status == 0)
369                 *data = (buf[1] & mask) >> shift;
370 
371         return status;
372 }
373 
374 static int
375 at86rf230_read_subreg(struct at86rf230_local *lp,
376                       u8 addr, u8 mask, int shift, u8 *data)
377 {
378         int status;
379 
380         mutex_lock(&lp->bmux);
381         status = __at86rf230_read_subreg(lp, addr, mask, shift, data);
382         mutex_unlock(&lp->bmux);
383 
384         return status;
385 }
386 
387 static int
388 at86rf230_write_subreg(struct at86rf230_local *lp,
389                        u8 addr, u8 mask, int shift, u8 data)
390 {
391         int status;
392         u8 val;
393 
394         mutex_lock(&lp->bmux);
395         status = __at86rf230_read_subreg(lp, addr, 0xff, 0, &val);
396         if (status)
397                 goto out;
398 
399         val &= ~mask;
400         val |= (data << shift) & mask;
401 
402         status = __at86rf230_write(lp, addr, val);
403 out:
404         mutex_unlock(&lp->bmux);
405 
406         return status;
407 }
408 
409 static int
410 at86rf230_write_fbuf(struct at86rf230_local *lp, u8 *data, u8 len)
411 {
412         u8 *buf = lp->buf;
413         int status;
414         struct spi_message msg;
415         struct spi_transfer xfer_head = {
416                 .len            = 2,
417                 .tx_buf         = buf,
418 
419         };
420         struct spi_transfer xfer_buf = {
421                 .len            = len,
422                 .tx_buf         = data,
423         };
424 
425         mutex_lock(&lp->bmux);
426         buf[0] = CMD_WRITE | CMD_FB;
427         buf[1] = len + 2; /* 2 bytes for CRC that isn't written */
428 
429         dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
430         dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
431 
432         spi_message_init(&msg);
433         spi_message_add_tail(&xfer_head, &msg);
434         spi_message_add_tail(&xfer_buf, &msg);
435 
436         status = spi_sync(lp->spi, &msg);
437         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
438         if (msg.status)
439                 status = msg.status;
440 
441         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
442         dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
443         dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
444 
445         mutex_unlock(&lp->bmux);
446         return status;
447 }
448 
449 static int
450 at86rf230_read_fbuf(struct at86rf230_local *lp, u8 *data, u8 *len, u8 *lqi)
451 {
452         u8 *buf = lp->buf;
453         int status;
454         struct spi_message msg;
455         struct spi_transfer xfer_head = {
456                 .len            = 2,
457                 .tx_buf         = buf,
458                 .rx_buf         = buf,
459         };
460         struct spi_transfer xfer_head1 = {
461                 .len            = 2,
462                 .tx_buf         = buf,
463                 .rx_buf         = buf,
464         };
465         struct spi_transfer xfer_buf = {
466                 .len            = 0,
467                 .rx_buf         = data,
468         };
469 
470         mutex_lock(&lp->bmux);
471 
472         buf[0] = CMD_FB;
473         buf[1] = 0x00;
474 
475         spi_message_init(&msg);
476         spi_message_add_tail(&xfer_head, &msg);
477 
478         status = spi_sync(lp->spi, &msg);
479         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
480 
481         xfer_buf.len = *(buf + 1) + 1;
482         *len = buf[1];
483 
484         buf[0] = CMD_FB;
485         buf[1] = 0x00;
486 
487         spi_message_init(&msg);
488         spi_message_add_tail(&xfer_head1, &msg);
489         spi_message_add_tail(&xfer_buf, &msg);
490 
491         status = spi_sync(lp->spi, &msg);
492 
493         if (msg.status)
494                 status = msg.status;
495 
496         dev_vdbg(&lp->spi->dev, "status = %d\n", status);
497         dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
498         dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
499 
500         if (status) {
501                 if (lqi && (*len > lp->buf[1]))
502                         *lqi = data[lp->buf[1]];
503         }
504         mutex_unlock(&lp->bmux);
505 
506         return status;
507 }
508 
509 static int
510 at86rf230_ed(struct ieee802154_dev *dev, u8 *level)
511 {
512         might_sleep();
513         BUG_ON(!level);
514         *level = 0xbe;
515         return 0;
516 }
517 
518 static int
519 at86rf230_state(struct ieee802154_dev *dev, int state)
520 {
521         struct at86rf230_local *lp = dev->priv;
522         int rc;
523         u8 val;
524         u8 desired_status;
525 
526         might_sleep();
527 
528         if (state == STATE_FORCE_TX_ON)
529                 desired_status = STATE_TX_ON;
530         else if (state == STATE_FORCE_TRX_OFF)
531                 desired_status = STATE_TRX_OFF;
532         else
533                 desired_status = state;
534 
535         do {
536                 rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &val);
537                 if (rc)
538                         goto err;
539         } while (val == STATE_TRANSITION_IN_PROGRESS);
540 
541         if (val == desired_status)
542                 return 0;
543 
544         /* state is equal to phy states */
545         rc = at86rf230_write_subreg(lp, SR_TRX_CMD, state);
546         if (rc)
547                 goto err;
548 
549         do {
550                 rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &val);
551                 if (rc)
552                         goto err;
553         } while (val == STATE_TRANSITION_IN_PROGRESS);
554 
555 
556         if (val == desired_status ||
557             (desired_status == STATE_RX_ON && val == STATE_BUSY_RX) ||
558             (desired_status == STATE_RX_AACK_ON && val == STATE_BUSY_RX_AACK))
559                 return 0;
560 
561         pr_err("unexpected state change: %d, asked for %d\n", val, state);
562         return -EBUSY;
563 
564 err:
565         pr_err("error: %d\n", rc);
566         return rc;
567 }
568 
569 static int
570 at86rf230_start(struct ieee802154_dev *dev)
571 {
572         struct at86rf230_local *lp = dev->priv;
573         u8 rc;
574 
575         rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
576         if (rc)
577                 return rc;
578 
579         rc = at86rf230_state(dev, STATE_TX_ON);
580         if (rc)
581                 return rc;
582 
583         return at86rf230_state(dev, STATE_RX_AACK_ON);
584 }
585 
586 static void
587 at86rf230_stop(struct ieee802154_dev *dev)
588 {
589         at86rf230_state(dev, STATE_FORCE_TRX_OFF);
590 }
591 
592 static int
593 at86rf230_set_channel(struct at86rf230_local *lp, int page, int channel)
594 {
595         lp->rssi_base_val = -91;
596 
597         return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
598 }
599 
600 static int
601 at86rf212_set_channel(struct at86rf230_local *lp, int page, int channel)
602 {
603         int rc;
604 
605         if (channel == 0)
606                 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0);
607         else
608                 rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1);
609         if (rc < 0)
610                 return rc;
611 
612         if (page == 0) {
613                 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
614                 lp->rssi_base_val = -100;
615         } else {
616                 rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
617                 lp->rssi_base_val = -98;
618         }
619         if (rc < 0)
620                 return rc;
621 
622         return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
623 }
624 
625 static int
626 at86rf230_channel(struct ieee802154_dev *dev, int page, int channel)
627 {
628         struct at86rf230_local *lp = dev->priv;
629         int rc;
630 
631         might_sleep();
632 
633         if (page < 0 || page > 31 ||
634             !(lp->dev->phy->channels_supported[page] & BIT(channel))) {
635                 WARN_ON(1);
636                 return -EINVAL;
637         }
638 
639         if (is_rf212(lp))
640                 rc = at86rf212_set_channel(lp, page, channel);
641         else
642                 rc = at86rf230_set_channel(lp, page, channel);
643         if (rc < 0)
644                 return rc;
645 
646         msleep(1); /* Wait for PLL */
647         dev->phy->current_channel = channel;
648         dev->phy->current_page = page;
649 
650         return 0;
651 }
652 
653 static int
654 at86rf230_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
655 {
656         struct at86rf230_local *lp = dev->priv;
657         int rc;
658         unsigned long flags;
659 
660         spin_lock_irqsave(&lp->lock, flags);
661         if  (lp->irq_busy) {
662                 spin_unlock_irqrestore(&lp->lock, flags);
663                 return -EBUSY;
664         }
665         spin_unlock_irqrestore(&lp->lock, flags);
666 
667         might_sleep();
668 
669         rc = at86rf230_state(dev, STATE_FORCE_TX_ON);
670         if (rc)
671                 goto err;
672 
673         spin_lock_irqsave(&lp->lock, flags);
674         lp->is_tx = 1;
675         reinit_completion(&lp->tx_complete);
676         spin_unlock_irqrestore(&lp->lock, flags);
677 
678         rc = at86rf230_write_fbuf(lp, skb->data, skb->len);
679         if (rc)
680                 goto err_rx;
681 
682         if (lp->tx_aret) {
683                 rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_TX_ARET_ON);
684                 if (rc)
685                         goto err_rx;
686         }
687 
688         rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_BUSY_TX);
689         if (rc)
690                 goto err_rx;
691 
692         rc = wait_for_completion_interruptible(&lp->tx_complete);
693         if (rc < 0)
694                 goto err_rx;
695 
696         return at86rf230_start(dev);
697 err_rx:
698         at86rf230_start(dev);
699 err:
700         pr_err("error: %d\n", rc);
701 
702         spin_lock_irqsave(&lp->lock, flags);
703         lp->is_tx = 0;
704         spin_unlock_irqrestore(&lp->lock, flags);
705 
706         return rc;
707 }
708 
709 static int at86rf230_rx(struct at86rf230_local *lp)
710 {
711         u8 len = 128, lqi = 0;
712         struct sk_buff *skb;
713 
714         skb = alloc_skb(len, GFP_KERNEL);
715 
716         if (!skb)
717                 return -ENOMEM;
718 
719         if (at86rf230_read_fbuf(lp, skb_put(skb, len), &len, &lqi))
720                 goto err;
721 
722         if (len < 2)
723                 goto err;
724 
725         skb_trim(skb, len - 2); /* We do not put CRC into the frame */
726 
727         ieee802154_rx_irqsafe(lp->dev, skb, lqi);
728 
729         dev_dbg(&lp->spi->dev, "READ_FBUF: %d %x\n", len, lqi);
730 
731         return 0;
732 err:
733         pr_debug("received frame is too small\n");
734 
735         kfree_skb(skb);
736         return -EINVAL;
737 }
738 
739 static int
740 at86rf230_set_hw_addr_filt(struct ieee802154_dev *dev,
741                            struct ieee802154_hw_addr_filt *filt,
742                            unsigned long changed)
743 {
744         struct at86rf230_local *lp = dev->priv;
745 
746         if (changed & IEEE802515_AFILT_SADDR_CHANGED) {
747                 u16 addr = le16_to_cpu(filt->short_addr);
748 
749                 dev_vdbg(&lp->spi->dev,
750                         "at86rf230_set_hw_addr_filt called for saddr\n");
751                 __at86rf230_write(lp, RG_SHORT_ADDR_0, addr);
752                 __at86rf230_write(lp, RG_SHORT_ADDR_1, addr >> 8);
753         }
754 
755         if (changed & IEEE802515_AFILT_PANID_CHANGED) {
756                 u16 pan = le16_to_cpu(filt->pan_id);
757 
758                 dev_vdbg(&lp->spi->dev,
759                         "at86rf230_set_hw_addr_filt called for pan id\n");
760                 __at86rf230_write(lp, RG_PAN_ID_0, pan);
761                 __at86rf230_write(lp, RG_PAN_ID_1, pan >> 8);
762         }
763 
764         if (changed & IEEE802515_AFILT_IEEEADDR_CHANGED) {
765                 u8 i, addr[8];
766 
767                 memcpy(addr, &filt->ieee_addr, 8);
768                 dev_vdbg(&lp->spi->dev,
769                         "at86rf230_set_hw_addr_filt called for IEEE addr\n");
770                 for (i = 0; i < 8; i++)
771                         __at86rf230_write(lp, RG_IEEE_ADDR_0 + i, addr[i]);
772         }
773 
774         if (changed & IEEE802515_AFILT_PANC_CHANGED) {
775                 dev_vdbg(&lp->spi->dev,
776                         "at86rf230_set_hw_addr_filt called for panc change\n");
777                 if (filt->pan_coord)
778                         at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 1);
779                 else
780                         at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 0);
781         }
782 
783         return 0;
784 }
785 
786 static int
787 at86rf212_set_txpower(struct ieee802154_dev *dev, int db)
788 {
789         struct at86rf230_local *lp = dev->priv;
790 
791         /* typical maximum output is 5dBm with RG_PHY_TX_PWR 0x60, lower five
792          * bits decrease power in 1dB steps. 0x60 represents extra PA gain of
793          * 0dB.
794          * thus, supported values for db range from -26 to 5, for 31dB of
795          * reduction to 0dB of reduction.
796          */
797         if (db > 5 || db < -26)
798                 return -EINVAL;
799 
800         db = -(db - 5);
801 
802         return __at86rf230_write(lp, RG_PHY_TX_PWR, 0x60 | db);
803 }
804 
805 static int
806 at86rf212_set_lbt(struct ieee802154_dev *dev, bool on)
807 {
808         struct at86rf230_local *lp = dev->priv;
809 
810         return at86rf230_write_subreg(lp, SR_CSMA_LBT_MODE, on);
811 }
812 
813 static int
814 at86rf212_set_cca_mode(struct ieee802154_dev *dev, u8 mode)
815 {
816         struct at86rf230_local *lp = dev->priv;
817 
818         return at86rf230_write_subreg(lp, SR_CCA_MODE, mode);
819 }
820 
821 static int
822 at86rf212_set_cca_ed_level(struct ieee802154_dev *dev, s32 level)
823 {
824         struct at86rf230_local *lp = dev->priv;
825         int desens_steps;
826 
827         if (level < lp->rssi_base_val || level > 30)
828                 return -EINVAL;
829 
830         desens_steps = (level - lp->rssi_base_val) * 100 / 207;
831 
832         return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, desens_steps);
833 }
834 
835 static int
836 at86rf212_set_csma_params(struct ieee802154_dev *dev, u8 min_be, u8 max_be,
837                           u8 retries)
838 {
839         struct at86rf230_local *lp = dev->priv;
840         int rc;
841 
842         if (min_be > max_be || max_be > 8 || retries > 5)
843                 return -EINVAL;
844 
845         rc = at86rf230_write_subreg(lp, SR_MIN_BE, min_be);
846         if (rc)
847                 return rc;
848 
849         rc = at86rf230_write_subreg(lp, SR_MAX_BE, max_be);
850         if (rc)
851                 return rc;
852 
853         return at86rf230_write_subreg(lp, SR_MAX_CSMA_RETRIES, retries);
854 }
855 
856 static int
857 at86rf212_set_frame_retries(struct ieee802154_dev *dev, s8 retries)
858 {
859         struct at86rf230_local *lp = dev->priv;
860         int rc = 0;
861 
862         if (retries < -1 || retries > 15)
863                 return -EINVAL;
864 
865         lp->tx_aret = retries >= 0;
866 
867         if (retries >= 0)
868                 rc = at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);
869 
870         return rc;
871 }
872 
873 static struct ieee802154_ops at86rf230_ops = {
874         .owner = THIS_MODULE,
875         .xmit = at86rf230_xmit,
876         .ed = at86rf230_ed,
877         .set_channel = at86rf230_channel,
878         .start = at86rf230_start,
879         .stop = at86rf230_stop,
880         .set_hw_addr_filt = at86rf230_set_hw_addr_filt,
881 };
882 
883 static struct ieee802154_ops at86rf212_ops = {
884         .owner = THIS_MODULE,
885         .xmit = at86rf230_xmit,
886         .ed = at86rf230_ed,
887         .set_channel = at86rf230_channel,
888         .start = at86rf230_start,
889         .stop = at86rf230_stop,
890         .set_hw_addr_filt = at86rf230_set_hw_addr_filt,
891         .set_txpower = at86rf212_set_txpower,
892         .set_lbt = at86rf212_set_lbt,
893         .set_cca_mode = at86rf212_set_cca_mode,
894         .set_cca_ed_level = at86rf212_set_cca_ed_level,
895         .set_csma_params = at86rf212_set_csma_params,
896         .set_frame_retries = at86rf212_set_frame_retries,
897 };
898 
899 static void at86rf230_irqwork(struct work_struct *work)
900 {
901         struct at86rf230_local *lp =
902                 container_of(work, struct at86rf230_local, irqwork);
903         u8 status = 0, val;
904         int rc;
905         unsigned long flags;
906 
907         rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &val);
908         status |= val;
909 
910         status &= ~IRQ_PLL_LOCK; /* ignore */
911         status &= ~IRQ_RX_START; /* ignore */
912         status &= ~IRQ_AMI; /* ignore */
913         status &= ~IRQ_TRX_UR; /* FIXME: possibly handle ???*/
914 
915         if (status & IRQ_TRX_END) {
916                 status &= ~IRQ_TRX_END;
917                 spin_lock_irqsave(&lp->lock, flags);
918                 if (lp->is_tx) {
919                         lp->is_tx = 0;
920                         spin_unlock_irqrestore(&lp->lock, flags);
921                         complete(&lp->tx_complete);
922                 } else {
923                         spin_unlock_irqrestore(&lp->lock, flags);
924                         at86rf230_rx(lp);
925                 }
926         }
927 
928         spin_lock_irqsave(&lp->lock, flags);
929         lp->irq_busy = 0;
930         spin_unlock_irqrestore(&lp->lock, flags);
931 }
932 
933 static void at86rf230_irqwork_level(struct work_struct *work)
934 {
935         struct at86rf230_local *lp =
936                 container_of(work, struct at86rf230_local, irqwork);
937 
938         at86rf230_irqwork(work);
939 
940         enable_irq(lp->spi->irq);
941 }
942 
943 static irqreturn_t at86rf230_isr(int irq, void *data)
944 {
945         struct at86rf230_local *lp = data;
946         unsigned long flags;
947 
948         spin_lock_irqsave(&lp->lock, flags);
949         lp->irq_busy = 1;
950         spin_unlock_irqrestore(&lp->lock, flags);
951 
952         schedule_work(&lp->irqwork);
953 
954         return IRQ_HANDLED;
955 }
956 
957 static irqreturn_t at86rf230_isr_level(int irq, void *data)
958 {
959         disable_irq_nosync(irq);
960 
961         return at86rf230_isr(irq, data);
962 }
963 
964 static int at86rf230_hw_init(struct at86rf230_local *lp)
965 {
966         int rc, irq_pol, irq_type;
967         u8 dvdd;
968         u8 csma_seed[2];
969 
970         rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_FORCE_TRX_OFF);
971         if (rc)
972                 return rc;
973 
974         irq_type = irq_get_trigger_type(lp->spi->irq);
975         /* configure irq polarity, defaults to high active */
976         if (irq_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW))
977                 irq_pol = IRQ_ACTIVE_LOW;
978         else
979                 irq_pol = IRQ_ACTIVE_HIGH;
980 
981         rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);
982         if (rc)
983                 return rc;
984 
985         rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
986         if (rc)
987                 return rc;
988 
989         get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
990         rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
991         if (rc)
992                 return rc;
993         rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
994         if (rc)
995                 return rc;
996 
997         /* CLKM changes are applied immediately */
998         rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0x00);
999         if (rc)
1000                 return rc;
1001 
1002         /* Turn CLKM Off */
1003         rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0x00);
1004         if (rc)
1005                 return rc;
1006         /* Wait the next SLEEP cycle */
1007         msleep(100);
1008 
1009         rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);
1010         if (rc)
1011                 return rc;
1012         if (!dvdd) {
1013                 dev_err(&lp->spi->dev, "DVDD error\n");
1014                 return -EINVAL;
1015         }
1016 
1017         return 0;
1018 }
1019 
1020 static struct at86rf230_platform_data *
1021 at86rf230_get_pdata(struct spi_device *spi)
1022 {
1023         struct at86rf230_platform_data *pdata;
1024 
1025         if (!IS_ENABLED(CONFIG_OF) || !spi->dev.of_node)
1026                 return spi->dev.platform_data;
1027 
1028         pdata = devm_kzalloc(&spi->dev, sizeof(*pdata), GFP_KERNEL);
1029         if (!pdata)
1030                 goto done;
1031 
1032         pdata->rstn = of_get_named_gpio(spi->dev.of_node, "reset-gpio", 0);
1033         pdata->slp_tr = of_get_named_gpio(spi->dev.of_node, "sleep-gpio", 0);
1034 
1035         spi->dev.platform_data = pdata;
1036 done:
1037         return pdata;
1038 }
1039 
1040 static int at86rf230_probe(struct spi_device *spi)
1041 {
1042         struct at86rf230_platform_data *pdata;
1043         struct ieee802154_dev *dev;
1044         struct at86rf230_local *lp;
1045         u16 man_id = 0;
1046         u8 part = 0, version = 0, status;
1047         irq_handler_t irq_handler;
1048         work_func_t irq_worker;
1049         int rc, irq_type;
1050         const char *chip;
1051         struct ieee802154_ops *ops = NULL;
1052 
1053         if (!spi->irq) {
1054                 dev_err(&spi->dev, "no IRQ specified\n");
1055                 return -EINVAL;
1056         }
1057 
1058         pdata = at86rf230_get_pdata(spi);
1059         if (!pdata) {
1060                 dev_err(&spi->dev, "no platform_data\n");
1061                 return -EINVAL;
1062         }
1063 
1064         if (gpio_is_valid(pdata->rstn)) {
1065                 rc = devm_gpio_request_one(&spi->dev, pdata->rstn,
1066                                            GPIOF_OUT_INIT_HIGH, "rstn");
1067                 if (rc)
1068                         return rc;
1069         }
1070 
1071         if (gpio_is_valid(pdata->slp_tr)) {
1072                 rc = devm_gpio_request_one(&spi->dev, pdata->slp_tr,
1073                                            GPIOF_OUT_INIT_LOW, "slp_tr");
1074                 if (rc)
1075                         return rc;
1076         }
1077 
1078         /* Reset */
1079         if (gpio_is_valid(pdata->rstn)) {
1080                 udelay(1);
1081                 gpio_set_value(pdata->rstn, 0);
1082                 udelay(1);
1083                 gpio_set_value(pdata->rstn, 1);
1084                 usleep_range(120, 240);
1085         }
1086 
1087         rc = __at86rf230_detect_device(spi, &man_id, &part, &version);
1088         if (rc < 0)
1089                 return rc;
1090 
1091         if (man_id != 0x001f) {
1092                 dev_err(&spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
1093                         man_id >> 8, man_id & 0xFF);
1094                 return -EINVAL;
1095         }
1096 
1097         switch (part) {
1098         case 2:
1099                 chip = "at86rf230";
1100                 /* FIXME: should be easy to support; */
1101                 break;
1102         case 3:
1103                 chip = "at86rf231";
1104                 ops = &at86rf230_ops;
1105                 break;
1106         case 7:
1107                 chip = "at86rf212";
1108                 if (version == 1)
1109                         ops = &at86rf212_ops;
1110                 break;
1111         case 11:
1112                 chip = "at86rf233";
1113                 ops = &at86rf230_ops;
1114                 break;
1115         default:
1116                 chip = "UNKNOWN";
1117                 break;
1118         }
1119 
1120         dev_info(&spi->dev, "Detected %s chip version %d\n", chip, version);
1121         if (!ops)
1122                 return -ENOTSUPP;
1123 
1124         dev = ieee802154_alloc_device(sizeof(*lp), ops);
1125         if (!dev)
1126                 return -ENOMEM;
1127 
1128         lp = dev->priv;
1129         lp->dev = dev;
1130         lp->part = part;
1131         lp->vers = version;
1132 
1133         lp->spi = spi;
1134 
1135         dev->parent = &spi->dev;
1136         dev->extra_tx_headroom = 0;
1137         dev->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AACK;
1138 
1139         irq_type = irq_get_trigger_type(spi->irq);
1140         if (!irq_type)
1141                 irq_type = IRQF_TRIGGER_RISING;
1142         if (irq_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
1143                 irq_worker = at86rf230_irqwork;
1144                 irq_handler = at86rf230_isr;
1145         } else {
1146                 irq_worker = at86rf230_irqwork_level;
1147                 irq_handler = at86rf230_isr_level;
1148         }
1149 
1150         mutex_init(&lp->bmux);
1151         INIT_WORK(&lp->irqwork, irq_worker);
1152         spin_lock_init(&lp->lock);
1153         init_completion(&lp->tx_complete);
1154 
1155         spi_set_drvdata(spi, lp);
1156 
1157         if (is_rf212(lp)) {
1158                 dev->phy->channels_supported[0] = 0x00007FF;
1159                 dev->phy->channels_supported[2] = 0x00007FF;
1160         } else {
1161                 dev->phy->channels_supported[0] = 0x7FFF800;
1162         }
1163 
1164         rc = at86rf230_hw_init(lp);
1165         if (rc)
1166                 goto err_hw_init;
1167 
1168         /* Read irq status register to reset irq line */
1169         rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);
1170         if (rc)
1171                 goto err_hw_init;
1172 
1173         rc = devm_request_irq(&spi->dev, spi->irq, irq_handler,
1174                               IRQF_SHARED | irq_type,
1175                               dev_name(&spi->dev), lp);
1176         if (rc)
1177                 goto err_hw_init;
1178 
1179         rc = ieee802154_register_device(lp->dev);
1180         if (rc)
1181                 goto err_hw_init;
1182 
1183         return rc;
1184 
1185 err_hw_init:
1186         flush_work(&lp->irqwork);
1187         mutex_destroy(&lp->bmux);
1188         ieee802154_free_device(lp->dev);
1189 
1190         return rc;
1191 }
1192 
1193 static int at86rf230_remove(struct spi_device *spi)
1194 {
1195         struct at86rf230_local *lp = spi_get_drvdata(spi);
1196 
1197         /* mask all at86rf230 irq's */
1198         at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
1199         ieee802154_unregister_device(lp->dev);
1200         flush_work(&lp->irqwork);
1201         mutex_destroy(&lp->bmux);
1202         ieee802154_free_device(lp->dev);
1203         dev_dbg(&spi->dev, "unregistered at86rf230\n");
1204 
1205         return 0;
1206 }
1207 
1208 static const struct of_device_id at86rf230_of_match[] = {
1209         { .compatible = "atmel,at86rf230", },
1210         { .compatible = "atmel,at86rf231", },
1211         { .compatible = "atmel,at86rf233", },
1212         { .compatible = "atmel,at86rf212", },
1213         { },
1214 };
1215 MODULE_DEVICE_TABLE(of, at86rf230_of_match);
1216 
1217 static const struct spi_device_id at86rf230_device_id[] = {
1218         { .name = "at86rf230", },
1219         { .name = "at86rf231", },
1220         { .name = "at86rf233", },
1221         { .name = "at86rf212", },
1222         { },
1223 };
1224 MODULE_DEVICE_TABLE(spi, at86rf230_device_id);
1225 
1226 static struct spi_driver at86rf230_driver = {
1227         .id_table = at86rf230_device_id,
1228         .driver = {
1229                 .of_match_table = of_match_ptr(at86rf230_of_match),
1230                 .name   = "at86rf230",
1231                 .owner  = THIS_MODULE,
1232         },
1233         .probe      = at86rf230_probe,
1234         .remove     = at86rf230_remove,
1235 };
1236 
1237 module_spi_driver(at86rf230_driver);
1238 
1239 MODULE_DESCRIPTION("AT86RF230 Transceiver Driver");
1240 MODULE_LICENSE("GPL v2");
1241 

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