Commit | Line | Data |
---|---|---|
0da6bc8c VB |
1 | /* Driver for TI CC2520 802.15.4 Wireless-PAN Networking controller |
2 | * | |
3 | * Copyright (C) 2014 Varka Bhadram <varkab@cdac.in> | |
4 | * Md.Jamal Mohiuddin <mjmohiuddin@cdac.in> | |
5 | * P Sowjanya <sowjanyap@cdac.in> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/gpio.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/spi/spi.h> | |
18 | #include <linux/spi/cc2520.h> | |
19 | #include <linux/workqueue.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/skbuff.h> | |
0da6bc8c | 22 | #include <linux/of_gpio.h> |
4ca24aca | 23 | #include <linux/ieee802154.h> |
0da6bc8c VB |
24 | |
25 | #include <net/mac802154.h> | |
5ad60d36 | 26 | #include <net/cfg802154.h> |
0da6bc8c VB |
27 | |
28 | #define SPI_COMMAND_BUFFER 3 | |
29 | #define HIGH 1 | |
30 | #define LOW 0 | |
31 | #define STATE_IDLE 0 | |
32 | #define RSSI_VALID 0 | |
33 | #define RSSI_OFFSET 78 | |
34 | ||
35 | #define CC2520_RAM_SIZE 640 | |
36 | #define CC2520_FIFO_SIZE 128 | |
37 | ||
38 | #define CC2520RAM_TXFIFO 0x100 | |
39 | #define CC2520RAM_RXFIFO 0x180 | |
40 | #define CC2520RAM_IEEEADDR 0x3EA | |
41 | #define CC2520RAM_PANID 0x3F2 | |
42 | #define CC2520RAM_SHORTADDR 0x3F4 | |
43 | ||
44 | #define CC2520_FREG_MASK 0x3F | |
45 | ||
46 | /* status byte values */ | |
908edc54 MJ |
47 | #define CC2520_STATUS_XOSC32M_STABLE BIT(7) |
48 | #define CC2520_STATUS_RSSI_VALID BIT(6) | |
49 | #define CC2520_STATUS_TX_UNDERFLOW BIT(3) | |
0da6bc8c VB |
50 | |
51 | /* IEEE-802.15.4 defined constants (2.4 GHz logical channels) */ | |
52 | #define CC2520_MINCHANNEL 11 | |
53 | #define CC2520_MAXCHANNEL 26 | |
54 | #define CC2520_CHANNEL_SPACING 5 | |
55 | ||
56 | /* command strobes */ | |
57 | #define CC2520_CMD_SNOP 0x00 | |
58 | #define CC2520_CMD_IBUFLD 0x02 | |
59 | #define CC2520_CMD_SIBUFEX 0x03 | |
60 | #define CC2520_CMD_SSAMPLECCA 0x04 | |
61 | #define CC2520_CMD_SRES 0x0f | |
62 | #define CC2520_CMD_MEMORY_MASK 0x0f | |
63 | #define CC2520_CMD_MEMORY_READ 0x10 | |
64 | #define CC2520_CMD_MEMORY_WRITE 0x20 | |
65 | #define CC2520_CMD_RXBUF 0x30 | |
66 | #define CC2520_CMD_RXBUFCP 0x38 | |
67 | #define CC2520_CMD_RXBUFMOV 0x32 | |
68 | #define CC2520_CMD_TXBUF 0x3A | |
69 | #define CC2520_CMD_TXBUFCP 0x3E | |
70 | #define CC2520_CMD_RANDOM 0x3C | |
71 | #define CC2520_CMD_SXOSCON 0x40 | |
72 | #define CC2520_CMD_STXCAL 0x41 | |
73 | #define CC2520_CMD_SRXON 0x42 | |
74 | #define CC2520_CMD_STXON 0x43 | |
75 | #define CC2520_CMD_STXONCCA 0x44 | |
76 | #define CC2520_CMD_SRFOFF 0x45 | |
77 | #define CC2520_CMD_SXOSCOFF 0x46 | |
78 | #define CC2520_CMD_SFLUSHRX 0x47 | |
79 | #define CC2520_CMD_SFLUSHTX 0x48 | |
80 | #define CC2520_CMD_SACK 0x49 | |
81 | #define CC2520_CMD_SACKPEND 0x4A | |
82 | #define CC2520_CMD_SNACK 0x4B | |
83 | #define CC2520_CMD_SRXMASKBITSET 0x4C | |
84 | #define CC2520_CMD_SRXMASKBITCLR 0x4D | |
85 | #define CC2520_CMD_RXMASKAND 0x4E | |
86 | #define CC2520_CMD_RXMASKOR 0x4F | |
87 | #define CC2520_CMD_MEMCP 0x50 | |
88 | #define CC2520_CMD_MEMCPR 0x52 | |
89 | #define CC2520_CMD_MEMXCP 0x54 | |
90 | #define CC2520_CMD_MEMXWR 0x56 | |
91 | #define CC2520_CMD_BCLR 0x58 | |
92 | #define CC2520_CMD_BSET 0x59 | |
93 | #define CC2520_CMD_CTR_UCTR 0x60 | |
94 | #define CC2520_CMD_CBCMAC 0x64 | |
95 | #define CC2520_CMD_UCBCMAC 0x66 | |
96 | #define CC2520_CMD_CCM 0x68 | |
97 | #define CC2520_CMD_UCCM 0x6A | |
98 | #define CC2520_CMD_ECB 0x70 | |
99 | #define CC2520_CMD_ECBO 0x72 | |
100 | #define CC2520_CMD_ECBX 0x74 | |
101 | #define CC2520_CMD_INC 0x78 | |
102 | #define CC2520_CMD_ABORT 0x7F | |
103 | #define CC2520_CMD_REGISTER_READ 0x80 | |
104 | #define CC2520_CMD_REGISTER_WRITE 0xC0 | |
105 | ||
106 | /* status registers */ | |
107 | #define CC2520_CHIPID 0x40 | |
108 | #define CC2520_VERSION 0x42 | |
109 | #define CC2520_EXTCLOCK 0x44 | |
110 | #define CC2520_MDMCTRL0 0x46 | |
111 | #define CC2520_MDMCTRL1 0x47 | |
112 | #define CC2520_FREQEST 0x48 | |
113 | #define CC2520_RXCTRL 0x4A | |
114 | #define CC2520_FSCTRL 0x4C | |
115 | #define CC2520_FSCAL0 0x4E | |
116 | #define CC2520_FSCAL1 0x4F | |
117 | #define CC2520_FSCAL2 0x50 | |
118 | #define CC2520_FSCAL3 0x51 | |
119 | #define CC2520_AGCCTRL0 0x52 | |
120 | #define CC2520_AGCCTRL1 0x53 | |
121 | #define CC2520_AGCCTRL2 0x54 | |
122 | #define CC2520_AGCCTRL3 0x55 | |
123 | #define CC2520_ADCTEST0 0x56 | |
124 | #define CC2520_ADCTEST1 0x57 | |
125 | #define CC2520_ADCTEST2 0x58 | |
126 | #define CC2520_MDMTEST0 0x5A | |
127 | #define CC2520_MDMTEST1 0x5B | |
128 | #define CC2520_DACTEST0 0x5C | |
129 | #define CC2520_DACTEST1 0x5D | |
130 | #define CC2520_ATEST 0x5E | |
131 | #define CC2520_DACTEST2 0x5F | |
132 | #define CC2520_PTEST0 0x60 | |
133 | #define CC2520_PTEST1 0x61 | |
134 | #define CC2520_RESERVED 0x62 | |
135 | #define CC2520_DPUBIST 0x7A | |
136 | #define CC2520_ACTBIST 0x7C | |
137 | #define CC2520_RAMBIST 0x7E | |
138 | ||
139 | /* frame registers */ | |
140 | #define CC2520_FRMFILT0 0x00 | |
141 | #define CC2520_FRMFILT1 0x01 | |
142 | #define CC2520_SRCMATCH 0x02 | |
143 | #define CC2520_SRCSHORTEN0 0x04 | |
144 | #define CC2520_SRCSHORTEN1 0x05 | |
145 | #define CC2520_SRCSHORTEN2 0x06 | |
146 | #define CC2520_SRCEXTEN0 0x08 | |
147 | #define CC2520_SRCEXTEN1 0x09 | |
148 | #define CC2520_SRCEXTEN2 0x0A | |
149 | #define CC2520_FRMCTRL0 0x0C | |
150 | #define CC2520_FRMCTRL1 0x0D | |
151 | #define CC2520_RXENABLE0 0x0E | |
152 | #define CC2520_RXENABLE1 0x0F | |
153 | #define CC2520_EXCFLAG0 0x10 | |
154 | #define CC2520_EXCFLAG1 0x11 | |
155 | #define CC2520_EXCFLAG2 0x12 | |
156 | #define CC2520_EXCMASKA0 0x14 | |
157 | #define CC2520_EXCMASKA1 0x15 | |
158 | #define CC2520_EXCMASKA2 0x16 | |
159 | #define CC2520_EXCMASKB0 0x18 | |
160 | #define CC2520_EXCMASKB1 0x19 | |
161 | #define CC2520_EXCMASKB2 0x1A | |
162 | #define CC2520_EXCBINDX0 0x1C | |
163 | #define CC2520_EXCBINDX1 0x1D | |
164 | #define CC2520_EXCBINDY0 0x1E | |
165 | #define CC2520_EXCBINDY1 0x1F | |
166 | #define CC2520_GPIOCTRL0 0x20 | |
167 | #define CC2520_GPIOCTRL1 0x21 | |
168 | #define CC2520_GPIOCTRL2 0x22 | |
169 | #define CC2520_GPIOCTRL3 0x23 | |
170 | #define CC2520_GPIOCTRL4 0x24 | |
171 | #define CC2520_GPIOCTRL5 0x25 | |
172 | #define CC2520_GPIOPOLARITY 0x26 | |
173 | #define CC2520_GPIOCTRL 0x28 | |
174 | #define CC2520_DPUCON 0x2A | |
175 | #define CC2520_DPUSTAT 0x2C | |
176 | #define CC2520_FREQCTRL 0x2E | |
177 | #define CC2520_FREQTUNE 0x2F | |
178 | #define CC2520_TXPOWER 0x30 | |
179 | #define CC2520_TXCTRL 0x31 | |
180 | #define CC2520_FSMSTAT0 0x32 | |
181 | #define CC2520_FSMSTAT1 0x33 | |
182 | #define CC2520_FIFOPCTRL 0x34 | |
183 | #define CC2520_FSMCTRL 0x35 | |
184 | #define CC2520_CCACTRL0 0x36 | |
185 | #define CC2520_CCACTRL1 0x37 | |
186 | #define CC2520_RSSI 0x38 | |
187 | #define CC2520_RSSISTAT 0x39 | |
188 | #define CC2520_RXFIRST 0x3C | |
189 | #define CC2520_RXFIFOCNT 0x3E | |
190 | #define CC2520_TXFIFOCNT 0x3F | |
191 | ||
192 | /* Driver private information */ | |
193 | struct cc2520_private { | |
194 | struct spi_device *spi; /* SPI device structure */ | |
5a504397 | 195 | struct ieee802154_hw *hw; /* IEEE-802.15.4 device */ |
0da6bc8c VB |
196 | u8 *buf; /* SPI TX/Rx data buffer */ |
197 | struct mutex buffer_mutex; /* SPI buffer mutex */ | |
198 | bool is_tx; /* Flag for sync b/w Tx and Rx */ | |
1a1bc59c | 199 | bool amplified; /* Flag for CC2591 */ |
0da6bc8c VB |
200 | int fifo_pin; /* FIFO GPIO pin number */ |
201 | struct work_struct fifop_irqwork;/* Workqueue for FIFOP */ | |
202 | spinlock_t lock; /* Lock for is_tx*/ | |
203 | struct completion tx_complete; /* Work completion for Tx */ | |
204 | }; | |
205 | ||
206 | /* Generic Functions */ | |
207 | static int | |
208 | cc2520_cmd_strobe(struct cc2520_private *priv, u8 cmd) | |
209 | { | |
210 | int ret; | |
211 | u8 status = 0xff; | |
212 | struct spi_message msg; | |
213 | struct spi_transfer xfer = { | |
214 | .len = 0, | |
215 | .tx_buf = priv->buf, | |
216 | .rx_buf = priv->buf, | |
217 | }; | |
218 | ||
219 | spi_message_init(&msg); | |
220 | spi_message_add_tail(&xfer, &msg); | |
221 | ||
222 | mutex_lock(&priv->buffer_mutex); | |
223 | priv->buf[xfer.len++] = cmd; | |
224 | dev_vdbg(&priv->spi->dev, | |
225 | "command strobe buf[0] = %02x\n", | |
226 | priv->buf[0]); | |
227 | ||
228 | ret = spi_sync(priv->spi, &msg); | |
229 | if (!ret) | |
230 | status = priv->buf[0]; | |
231 | dev_vdbg(&priv->spi->dev, | |
232 | "buf[0] = %02x\n", priv->buf[0]); | |
233 | mutex_unlock(&priv->buffer_mutex); | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | static int | |
239 | cc2520_get_status(struct cc2520_private *priv, u8 *status) | |
240 | { | |
241 | int ret; | |
242 | struct spi_message msg; | |
243 | struct spi_transfer xfer = { | |
244 | .len = 0, | |
245 | .tx_buf = priv->buf, | |
246 | .rx_buf = priv->buf, | |
247 | }; | |
248 | ||
249 | spi_message_init(&msg); | |
250 | spi_message_add_tail(&xfer, &msg); | |
251 | ||
252 | mutex_lock(&priv->buffer_mutex); | |
253 | priv->buf[xfer.len++] = CC2520_CMD_SNOP; | |
254 | dev_vdbg(&priv->spi->dev, | |
255 | "get status command buf[0] = %02x\n", priv->buf[0]); | |
256 | ||
257 | ret = spi_sync(priv->spi, &msg); | |
258 | if (!ret) | |
259 | *status = priv->buf[0]; | |
260 | dev_vdbg(&priv->spi->dev, | |
261 | "buf[0] = %02x\n", priv->buf[0]); | |
262 | mutex_unlock(&priv->buffer_mutex); | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
267 | static int | |
268 | cc2520_write_register(struct cc2520_private *priv, u8 reg, u8 value) | |
269 | { | |
270 | int status; | |
271 | struct spi_message msg; | |
272 | struct spi_transfer xfer = { | |
273 | .len = 0, | |
274 | .tx_buf = priv->buf, | |
275 | .rx_buf = priv->buf, | |
276 | }; | |
277 | ||
278 | spi_message_init(&msg); | |
279 | spi_message_add_tail(&xfer, &msg); | |
280 | ||
281 | mutex_lock(&priv->buffer_mutex); | |
282 | ||
283 | if (reg <= CC2520_FREG_MASK) { | |
284 | priv->buf[xfer.len++] = CC2520_CMD_REGISTER_WRITE | reg; | |
285 | priv->buf[xfer.len++] = value; | |
286 | } else { | |
287 | priv->buf[xfer.len++] = CC2520_CMD_MEMORY_WRITE; | |
288 | priv->buf[xfer.len++] = reg; | |
289 | priv->buf[xfer.len++] = value; | |
290 | } | |
291 | status = spi_sync(priv->spi, &msg); | |
292 | if (msg.status) | |
293 | status = msg.status; | |
294 | ||
295 | mutex_unlock(&priv->buffer_mutex); | |
296 | ||
297 | return status; | |
298 | } | |
299 | ||
300 | static int | |
301 | cc2520_write_ram(struct cc2520_private *priv, u16 reg, u8 len, u8 *data) | |
302 | { | |
303 | int status; | |
304 | struct spi_message msg; | |
305 | struct spi_transfer xfer_head = { | |
306 | .len = 0, | |
307 | .tx_buf = priv->buf, | |
308 | .rx_buf = priv->buf, | |
309 | }; | |
310 | ||
311 | struct spi_transfer xfer_buf = { | |
312 | .len = len, | |
313 | .tx_buf = data, | |
314 | }; | |
315 | ||
316 | mutex_lock(&priv->buffer_mutex); | |
317 | priv->buf[xfer_head.len++] = (CC2520_CMD_MEMORY_WRITE | | |
318 | ((reg >> 8) & 0xff)); | |
319 | priv->buf[xfer_head.len++] = reg & 0xff; | |
320 | ||
321 | spi_message_init(&msg); | |
322 | spi_message_add_tail(&xfer_head, &msg); | |
323 | spi_message_add_tail(&xfer_buf, &msg); | |
324 | ||
325 | status = spi_sync(priv->spi, &msg); | |
326 | dev_dbg(&priv->spi->dev, "spi status = %d\n", status); | |
327 | if (msg.status) | |
328 | status = msg.status; | |
329 | ||
330 | mutex_unlock(&priv->buffer_mutex); | |
331 | return status; | |
332 | } | |
333 | ||
334 | static int | |
335 | cc2520_read_register(struct cc2520_private *priv, u8 reg, u8 *data) | |
336 | { | |
337 | int status; | |
338 | struct spi_message msg; | |
339 | struct spi_transfer xfer1 = { | |
340 | .len = 0, | |
341 | .tx_buf = priv->buf, | |
342 | .rx_buf = priv->buf, | |
343 | }; | |
344 | ||
345 | struct spi_transfer xfer2 = { | |
346 | .len = 1, | |
347 | .rx_buf = data, | |
348 | }; | |
349 | ||
350 | spi_message_init(&msg); | |
351 | spi_message_add_tail(&xfer1, &msg); | |
352 | spi_message_add_tail(&xfer2, &msg); | |
353 | ||
354 | mutex_lock(&priv->buffer_mutex); | |
355 | priv->buf[xfer1.len++] = CC2520_CMD_MEMORY_READ; | |
356 | priv->buf[xfer1.len++] = reg; | |
357 | ||
358 | status = spi_sync(priv->spi, &msg); | |
359 | dev_dbg(&priv->spi->dev, | |
360 | "spi status = %d\n", status); | |
361 | if (msg.status) | |
362 | status = msg.status; | |
363 | ||
364 | mutex_unlock(&priv->buffer_mutex); | |
365 | ||
366 | return status; | |
367 | } | |
368 | ||
369 | static int | |
370 | cc2520_write_txfifo(struct cc2520_private *priv, u8 *data, u8 len) | |
371 | { | |
372 | int status; | |
373 | ||
374 | /* length byte must include FCS even | |
375 | * if it is calculated in the hardware | |
376 | */ | |
377 | int len_byte = len + 2; | |
378 | ||
379 | struct spi_message msg; | |
380 | ||
381 | struct spi_transfer xfer_head = { | |
382 | .len = 0, | |
383 | .tx_buf = priv->buf, | |
384 | .rx_buf = priv->buf, | |
385 | }; | |
386 | struct spi_transfer xfer_len = { | |
387 | .len = 1, | |
388 | .tx_buf = &len_byte, | |
389 | }; | |
390 | struct spi_transfer xfer_buf = { | |
391 | .len = len, | |
392 | .tx_buf = data, | |
393 | }; | |
394 | ||
395 | spi_message_init(&msg); | |
396 | spi_message_add_tail(&xfer_head, &msg); | |
397 | spi_message_add_tail(&xfer_len, &msg); | |
398 | spi_message_add_tail(&xfer_buf, &msg); | |
399 | ||
400 | mutex_lock(&priv->buffer_mutex); | |
401 | priv->buf[xfer_head.len++] = CC2520_CMD_TXBUF; | |
402 | dev_vdbg(&priv->spi->dev, | |
403 | "TX_FIFO cmd buf[0] = %02x\n", priv->buf[0]); | |
404 | ||
405 | status = spi_sync(priv->spi, &msg); | |
406 | dev_vdbg(&priv->spi->dev, "status = %d\n", status); | |
407 | if (msg.status) | |
408 | status = msg.status; | |
409 | dev_vdbg(&priv->spi->dev, "status = %d\n", status); | |
410 | dev_vdbg(&priv->spi->dev, "buf[0] = %02x\n", priv->buf[0]); | |
411 | mutex_unlock(&priv->buffer_mutex); | |
412 | ||
413 | return status; | |
414 | } | |
415 | ||
416 | static int | |
417 | cc2520_read_rxfifo(struct cc2520_private *priv, u8 *data, u8 len, u8 *lqi) | |
418 | { | |
419 | int status; | |
420 | struct spi_message msg; | |
421 | ||
422 | struct spi_transfer xfer_head = { | |
423 | .len = 0, | |
424 | .tx_buf = priv->buf, | |
425 | .rx_buf = priv->buf, | |
426 | }; | |
427 | struct spi_transfer xfer_buf = { | |
428 | .len = len, | |
429 | .rx_buf = data, | |
430 | }; | |
431 | ||
432 | spi_message_init(&msg); | |
433 | spi_message_add_tail(&xfer_head, &msg); | |
434 | spi_message_add_tail(&xfer_buf, &msg); | |
435 | ||
436 | mutex_lock(&priv->buffer_mutex); | |
437 | priv->buf[xfer_head.len++] = CC2520_CMD_RXBUF; | |
438 | ||
439 | dev_vdbg(&priv->spi->dev, "read rxfifo buf[0] = %02x\n", priv->buf[0]); | |
440 | dev_vdbg(&priv->spi->dev, "buf[1] = %02x\n", priv->buf[1]); | |
441 | ||
442 | status = spi_sync(priv->spi, &msg); | |
443 | dev_vdbg(&priv->spi->dev, "status = %d\n", status); | |
444 | if (msg.status) | |
445 | status = msg.status; | |
446 | dev_vdbg(&priv->spi->dev, "status = %d\n", status); | |
447 | dev_vdbg(&priv->spi->dev, | |
448 | "return status buf[0] = %02x\n", priv->buf[0]); | |
449 | dev_vdbg(&priv->spi->dev, "length buf[1] = %02x\n", priv->buf[1]); | |
450 | ||
451 | mutex_unlock(&priv->buffer_mutex); | |
452 | ||
453 | return status; | |
454 | } | |
455 | ||
5a504397 | 456 | static int cc2520_start(struct ieee802154_hw *hw) |
0da6bc8c | 457 | { |
5a504397 | 458 | return cc2520_cmd_strobe(hw->priv, CC2520_CMD_SRXON); |
0da6bc8c VB |
459 | } |
460 | ||
5a504397 | 461 | static void cc2520_stop(struct ieee802154_hw *hw) |
0da6bc8c | 462 | { |
5a504397 | 463 | cc2520_cmd_strobe(hw->priv, CC2520_CMD_SRFOFF); |
0da6bc8c VB |
464 | } |
465 | ||
466 | static int | |
5a504397 | 467 | cc2520_tx(struct ieee802154_hw *hw, struct sk_buff *skb) |
0da6bc8c | 468 | { |
5a504397 | 469 | struct cc2520_private *priv = hw->priv; |
0da6bc8c VB |
470 | unsigned long flags; |
471 | int rc; | |
472 | u8 status = 0; | |
473 | ||
474 | rc = cc2520_cmd_strobe(priv, CC2520_CMD_SFLUSHTX); | |
475 | if (rc) | |
476 | goto err_tx; | |
477 | ||
478 | rc = cc2520_write_txfifo(priv, skb->data, skb->len); | |
479 | if (rc) | |
480 | goto err_tx; | |
481 | ||
482 | rc = cc2520_get_status(priv, &status); | |
483 | if (rc) | |
484 | goto err_tx; | |
485 | ||
486 | if (status & CC2520_STATUS_TX_UNDERFLOW) { | |
487 | dev_err(&priv->spi->dev, "cc2520 tx underflow exception\n"); | |
488 | goto err_tx; | |
489 | } | |
490 | ||
491 | spin_lock_irqsave(&priv->lock, flags); | |
492 | BUG_ON(priv->is_tx); | |
493 | priv->is_tx = 1; | |
494 | spin_unlock_irqrestore(&priv->lock, flags); | |
495 | ||
496 | rc = cc2520_cmd_strobe(priv, CC2520_CMD_STXONCCA); | |
497 | if (rc) | |
498 | goto err; | |
499 | ||
500 | rc = wait_for_completion_interruptible(&priv->tx_complete); | |
501 | if (rc < 0) | |
502 | goto err; | |
503 | ||
504 | cc2520_cmd_strobe(priv, CC2520_CMD_SFLUSHTX); | |
505 | cc2520_cmd_strobe(priv, CC2520_CMD_SRXON); | |
506 | ||
507 | return rc; | |
508 | err: | |
509 | spin_lock_irqsave(&priv->lock, flags); | |
510 | priv->is_tx = 0; | |
511 | spin_unlock_irqrestore(&priv->lock, flags); | |
512 | err_tx: | |
513 | return rc; | |
514 | } | |
515 | ||
0da6bc8c VB |
516 | static int cc2520_rx(struct cc2520_private *priv) |
517 | { | |
518 | u8 len = 0, lqi = 0, bytes = 1; | |
519 | struct sk_buff *skb; | |
520 | ||
521 | cc2520_read_rxfifo(priv, &len, bytes, &lqi); | |
522 | ||
523 | if (len < 2 || len > IEEE802154_MTU) | |
524 | return -EINVAL; | |
525 | ||
61a22814 | 526 | skb = dev_alloc_skb(len); |
0da6bc8c VB |
527 | if (!skb) |
528 | return -ENOMEM; | |
529 | ||
530 | if (cc2520_read_rxfifo(priv, skb_put(skb, len), len, &lqi)) { | |
531 | dev_dbg(&priv->spi->dev, "frame reception failed\n"); | |
532 | kfree_skb(skb); | |
533 | return -EINVAL; | |
534 | } | |
535 | ||
536 | skb_trim(skb, skb->len - 2); | |
537 | ||
5a504397 | 538 | ieee802154_rx_irqsafe(priv->hw, skb, lqi); |
0da6bc8c VB |
539 | |
540 | dev_vdbg(&priv->spi->dev, "RXFIFO: %x %x\n", len, lqi); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | static int | |
5a504397 | 546 | cc2520_ed(struct ieee802154_hw *hw, u8 *level) |
0da6bc8c | 547 | { |
5a504397 | 548 | struct cc2520_private *priv = hw->priv; |
0da6bc8c VB |
549 | u8 status = 0xff; |
550 | u8 rssi; | |
551 | int ret; | |
552 | ||
3251ca33 | 553 | ret = cc2520_read_register(priv, CC2520_RSSISTAT, &status); |
0da6bc8c VB |
554 | if (ret) |
555 | return ret; | |
556 | ||
557 | if (status != RSSI_VALID) | |
558 | return -EINVAL; | |
559 | ||
3251ca33 | 560 | ret = cc2520_read_register(priv, CC2520_RSSI, &rssi); |
0da6bc8c VB |
561 | if (ret) |
562 | return ret; | |
563 | ||
564 | /* level = RSSI(rssi) - OFFSET [dBm] : offset is 76dBm */ | |
565 | *level = rssi - RSSI_OFFSET; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | static int | |
e37d2ec8 | 571 | cc2520_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel) |
0da6bc8c | 572 | { |
5a504397 | 573 | struct cc2520_private *priv = hw->priv; |
0da6bc8c VB |
574 | int ret; |
575 | ||
0da6bc8c VB |
576 | dev_dbg(&priv->spi->dev, "trying to set channel\n"); |
577 | ||
578 | BUG_ON(page != 0); | |
579 | BUG_ON(channel < CC2520_MINCHANNEL); | |
580 | BUG_ON(channel > CC2520_MAXCHANNEL); | |
581 | ||
582 | ret = cc2520_write_register(priv, CC2520_FREQCTRL, | |
583 | 11 + 5*(channel - 11)); | |
584 | ||
585 | return ret; | |
586 | } | |
587 | ||
588 | static int | |
5a504397 | 589 | cc2520_filter(struct ieee802154_hw *hw, |
0da6bc8c VB |
590 | struct ieee802154_hw_addr_filt *filt, unsigned long changed) |
591 | { | |
5a504397 | 592 | struct cc2520_private *priv = hw->priv; |
c9d44203 | 593 | int ret = 0; |
0da6bc8c | 594 | |
57205c14 | 595 | if (changed & IEEE802154_AFILT_PANID_CHANGED) { |
0da6bc8c VB |
596 | u16 panid = le16_to_cpu(filt->pan_id); |
597 | ||
598 | dev_vdbg(&priv->spi->dev, | |
599 | "cc2520_filter called for pan id\n"); | |
c9d44203 SS |
600 | ret = cc2520_write_ram(priv, CC2520RAM_PANID, |
601 | sizeof(panid), (u8 *)&panid); | |
0da6bc8c VB |
602 | } |
603 | ||
57205c14 | 604 | if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) { |
0da6bc8c VB |
605 | dev_vdbg(&priv->spi->dev, |
606 | "cc2520_filter called for IEEE addr\n"); | |
c9d44203 SS |
607 | ret = cc2520_write_ram(priv, CC2520RAM_IEEEADDR, |
608 | sizeof(filt->ieee_addr), | |
609 | (u8 *)&filt->ieee_addr); | |
0da6bc8c VB |
610 | } |
611 | ||
57205c14 | 612 | if (changed & IEEE802154_AFILT_SADDR_CHANGED) { |
0da6bc8c VB |
613 | u16 addr = le16_to_cpu(filt->short_addr); |
614 | ||
615 | dev_vdbg(&priv->spi->dev, | |
616 | "cc2520_filter called for saddr\n"); | |
c9d44203 SS |
617 | ret = cc2520_write_ram(priv, CC2520RAM_SHORTADDR, |
618 | sizeof(addr), (u8 *)&addr); | |
0da6bc8c VB |
619 | } |
620 | ||
57205c14 | 621 | if (changed & IEEE802154_AFILT_PANC_CHANGED) { |
0da6bc8c VB |
622 | dev_vdbg(&priv->spi->dev, |
623 | "cc2520_filter called for panc change\n"); | |
624 | if (filt->pan_coord) | |
c9d44203 SS |
625 | ret = cc2520_write_register(priv, CC2520_FRMFILT0, |
626 | 0x02); | |
0da6bc8c | 627 | else |
c9d44203 SS |
628 | ret = cc2520_write_register(priv, CC2520_FRMFILT0, |
629 | 0x00); | |
0da6bc8c VB |
630 | } |
631 | ||
c9d44203 | 632 | return ret; |
0da6bc8c VB |
633 | } |
634 | ||
e10c1674 VB |
635 | static inline int cc2520_set_tx_power(struct cc2520_private *priv, s32 mbm) |
636 | { | |
637 | u8 power; | |
638 | ||
639 | switch (mbm) { | |
640 | case 500: | |
641 | power = 0xF7; | |
642 | break; | |
643 | case 300: | |
644 | power = 0xF2; | |
645 | break; | |
646 | case 200: | |
647 | power = 0xAB; | |
648 | break; | |
649 | case 100: | |
650 | power = 0x13; | |
651 | break; | |
652 | case 0: | |
653 | power = 0x32; | |
654 | break; | |
655 | case -200: | |
656 | power = 0x81; | |
657 | break; | |
658 | case -400: | |
659 | power = 0x88; | |
660 | break; | |
661 | case -700: | |
662 | power = 0x2C; | |
663 | break; | |
664 | case -1800: | |
665 | power = 0x03; | |
666 | break; | |
667 | default: | |
668 | return -EINVAL; | |
669 | } | |
670 | ||
671 | return cc2520_write_register(priv, CC2520_TXPOWER, power); | |
672 | } | |
673 | ||
674 | static inline int cc2520_cc2591_set_tx_power(struct cc2520_private *priv, | |
675 | s32 mbm) | |
676 | { | |
677 | u8 power; | |
678 | ||
679 | switch (mbm) { | |
680 | case 1700: | |
681 | power = 0xF9; | |
682 | break; | |
683 | case 1600: | |
684 | power = 0xF0; | |
685 | break; | |
686 | case 1400: | |
687 | power = 0xA0; | |
688 | break; | |
689 | case 1100: | |
690 | power = 0x2C; | |
691 | break; | |
692 | case -100: | |
693 | power = 0x03; | |
694 | break; | |
695 | case -800: | |
696 | power = 0x01; | |
697 | break; | |
698 | default: | |
699 | return -EINVAL; | |
700 | } | |
701 | ||
702 | return cc2520_write_register(priv, CC2520_TXPOWER, power); | |
703 | } | |
704 | ||
705 | #define CC2520_MAX_TX_POWERS 0x8 | |
706 | static const s32 cc2520_powers[CC2520_MAX_TX_POWERS + 1] = { | |
707 | 500, 300, 200, 100, 0, -200, -400, -700, -1800, | |
708 | }; | |
709 | ||
710 | #define CC2520_CC2591_MAX_TX_POWERS 0x5 | |
711 | static const s32 cc2520_cc2591_powers[CC2520_CC2591_MAX_TX_POWERS + 1] = { | |
712 | 1700, 1600, 1400, 1100, -100, -800, | |
713 | }; | |
714 | ||
715 | static int | |
716 | cc2520_set_txpower(struct ieee802154_hw *hw, s32 mbm) | |
717 | { | |
718 | struct cc2520_private *priv = hw->priv; | |
719 | ||
720 | if (!priv->amplified) | |
721 | return cc2520_set_tx_power(priv, mbm); | |
722 | ||
723 | return cc2520_cc2591_set_tx_power(priv, mbm); | |
724 | } | |
725 | ||
16301861 | 726 | static const struct ieee802154_ops cc2520_ops = { |
0da6bc8c VB |
727 | .owner = THIS_MODULE, |
728 | .start = cc2520_start, | |
729 | .stop = cc2520_stop, | |
ed0a5dce | 730 | .xmit_sync = cc2520_tx, |
0da6bc8c VB |
731 | .ed = cc2520_ed, |
732 | .set_channel = cc2520_set_channel, | |
733 | .set_hw_addr_filt = cc2520_filter, | |
e10c1674 | 734 | .set_txpower = cc2520_set_txpower, |
0da6bc8c VB |
735 | }; |
736 | ||
737 | static int cc2520_register(struct cc2520_private *priv) | |
738 | { | |
739 | int ret = -ENOMEM; | |
740 | ||
5a504397 AA |
741 | priv->hw = ieee802154_alloc_hw(sizeof(*priv), &cc2520_ops); |
742 | if (!priv->hw) | |
0da6bc8c VB |
743 | goto err_ret; |
744 | ||
5a504397 AA |
745 | priv->hw->priv = priv; |
746 | priv->hw->parent = &priv->spi->dev; | |
747 | priv->hw->extra_tx_headroom = 0; | |
7fc1b2d5 | 748 | ieee802154_random_extended_addr(&priv->hw->phy->perm_extended_addr); |
0da6bc8c VB |
749 | |
750 | /* We do support only 2.4 Ghz */ | |
72f655e4 | 751 | priv->hw->phy->supported.channels[0] = 0x7FFF800; |
f265be3d | 752 | priv->hw->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AFILT; |
0da6bc8c | 753 | |
e10c1674 VB |
754 | priv->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER; |
755 | ||
756 | if (!priv->amplified) { | |
757 | priv->hw->phy->supported.tx_powers = cc2520_powers; | |
758 | priv->hw->phy->supported.tx_powers_size = ARRAY_SIZE(cc2520_powers); | |
322fe2d1 | 759 | priv->hw->phy->transmit_power = priv->hw->phy->supported.tx_powers[4]; |
e10c1674 VB |
760 | } else { |
761 | priv->hw->phy->supported.tx_powers = cc2520_cc2591_powers; | |
762 | priv->hw->phy->supported.tx_powers_size = ARRAY_SIZE(cc2520_cc2591_powers); | |
322fe2d1 | 763 | priv->hw->phy->transmit_power = priv->hw->phy->supported.tx_powers[0]; |
e10c1674 VB |
764 | } |
765 | ||
d6d244d4 VB |
766 | priv->hw->phy->current_channel = 11; |
767 | ||
0da6bc8c | 768 | dev_vdbg(&priv->spi->dev, "registered cc2520\n"); |
5a504397 | 769 | ret = ieee802154_register_hw(priv->hw); |
0da6bc8c VB |
770 | if (ret) |
771 | goto err_free_device; | |
772 | ||
773 | return 0; | |
774 | ||
775 | err_free_device: | |
5a504397 | 776 | ieee802154_free_hw(priv->hw); |
0da6bc8c VB |
777 | err_ret: |
778 | return ret; | |
779 | } | |
780 | ||
781 | static void cc2520_fifop_irqwork(struct work_struct *work) | |
782 | { | |
783 | struct cc2520_private *priv | |
784 | = container_of(work, struct cc2520_private, fifop_irqwork); | |
785 | ||
786 | dev_dbg(&priv->spi->dev, "fifop interrupt received\n"); | |
787 | ||
788 | if (gpio_get_value(priv->fifo_pin)) | |
789 | cc2520_rx(priv); | |
790 | else | |
791 | dev_dbg(&priv->spi->dev, "rxfifo overflow\n"); | |
792 | ||
793 | cc2520_cmd_strobe(priv, CC2520_CMD_SFLUSHRX); | |
794 | cc2520_cmd_strobe(priv, CC2520_CMD_SFLUSHRX); | |
795 | } | |
796 | ||
797 | static irqreturn_t cc2520_fifop_isr(int irq, void *data) | |
798 | { | |
799 | struct cc2520_private *priv = data; | |
800 | ||
801 | schedule_work(&priv->fifop_irqwork); | |
802 | ||
803 | return IRQ_HANDLED; | |
804 | } | |
805 | ||
806 | static irqreturn_t cc2520_sfd_isr(int irq, void *data) | |
807 | { | |
808 | struct cc2520_private *priv = data; | |
809 | unsigned long flags; | |
810 | ||
811 | spin_lock_irqsave(&priv->lock, flags); | |
812 | if (priv->is_tx) { | |
813 | priv->is_tx = 0; | |
814 | spin_unlock_irqrestore(&priv->lock, flags); | |
815 | dev_dbg(&priv->spi->dev, "SFD for TX\n"); | |
816 | complete(&priv->tx_complete); | |
817 | } else { | |
818 | spin_unlock_irqrestore(&priv->lock, flags); | |
819 | dev_dbg(&priv->spi->dev, "SFD for RX\n"); | |
820 | } | |
821 | ||
822 | return IRQ_HANDLED; | |
823 | } | |
824 | ||
0db055c9 BC |
825 | static int cc2520_get_platform_data(struct spi_device *spi, |
826 | struct cc2520_platform_data *pdata) | |
827 | { | |
828 | struct device_node *np = spi->dev.of_node; | |
829 | struct cc2520_private *priv = spi_get_drvdata(spi); | |
830 | ||
831 | if (!np) { | |
832 | struct cc2520_platform_data *spi_pdata = spi->dev.platform_data; | |
833 | if (!spi_pdata) | |
834 | return -ENOENT; | |
835 | *pdata = *spi_pdata; | |
85998229 | 836 | priv->fifo_pin = pdata->fifo; |
0db055c9 BC |
837 | return 0; |
838 | } | |
839 | ||
840 | pdata->fifo = of_get_named_gpio(np, "fifo-gpio", 0); | |
841 | priv->fifo_pin = pdata->fifo; | |
842 | ||
843 | pdata->fifop = of_get_named_gpio(np, "fifop-gpio", 0); | |
844 | ||
845 | pdata->sfd = of_get_named_gpio(np, "sfd-gpio", 0); | |
846 | pdata->cca = of_get_named_gpio(np, "cca-gpio", 0); | |
847 | pdata->vreg = of_get_named_gpio(np, "vreg-gpio", 0); | |
848 | pdata->reset = of_get_named_gpio(np, "reset-gpio", 0); | |
849 | ||
1a1bc59c VB |
850 | /* CC2591 front end for CC2520 */ |
851 | if (of_property_read_bool(np, "amplified")) | |
852 | priv->amplified = true; | |
f0b7d43c | 853 | |
0db055c9 BC |
854 | return 0; |
855 | } | |
856 | ||
0da6bc8c VB |
857 | static int cc2520_hw_init(struct cc2520_private *priv) |
858 | { | |
859 | u8 status = 0, state = 0xff; | |
860 | int ret; | |
861 | int timeout = 100; | |
f0b7d43c BC |
862 | struct cc2520_platform_data pdata; |
863 | ||
864 | ret = cc2520_get_platform_data(priv->spi, &pdata); | |
865 | if (ret) | |
866 | goto err_ret; | |
0da6bc8c VB |
867 | |
868 | ret = cc2520_read_register(priv, CC2520_FSMSTAT1, &state); | |
869 | if (ret) | |
870 | goto err_ret; | |
871 | ||
872 | if (state != STATE_IDLE) | |
873 | return -EINVAL; | |
874 | ||
875 | do { | |
876 | ret = cc2520_get_status(priv, &status); | |
877 | if (ret) | |
878 | goto err_ret; | |
879 | ||
880 | if (timeout-- <= 0) { | |
881 | dev_err(&priv->spi->dev, "oscillator start failed!\n"); | |
882 | return ret; | |
883 | } | |
884 | udelay(1); | |
885 | } while (!(status & CC2520_STATUS_XOSC32M_STABLE)); | |
886 | ||
887 | dev_vdbg(&priv->spi->dev, "oscillator brought up\n"); | |
888 | ||
f0b7d43c BC |
889 | /* If the CC2520 is connected to a CC2591 amplifier, we must both |
890 | * configure GPIOs on the CC2520 to correctly configure the CC2591 | |
891 | * and change a couple settings of the CC2520 to work with the | |
892 | * amplifier. See section 8 page 17 of TI application note AN065. | |
893 | * http://www.ti.com/lit/an/swra229a/swra229a.pdf | |
894 | */ | |
1a1bc59c | 895 | if (priv->amplified) { |
f0b7d43c BC |
896 | ret = cc2520_write_register(priv, CC2520_AGCCTRL1, 0x16); |
897 | if (ret) | |
898 | goto err_ret; | |
899 | ||
900 | ret = cc2520_write_register(priv, CC2520_GPIOCTRL0, 0x46); | |
901 | if (ret) | |
902 | goto err_ret; | |
903 | ||
904 | ret = cc2520_write_register(priv, CC2520_GPIOCTRL5, 0x47); | |
905 | if (ret) | |
906 | goto err_ret; | |
907 | ||
908 | ret = cc2520_write_register(priv, CC2520_GPIOPOLARITY, 0x1e); | |
909 | if (ret) | |
910 | goto err_ret; | |
911 | ||
912 | ret = cc2520_write_register(priv, CC2520_TXCTRL, 0xc1); | |
913 | if (ret) | |
914 | goto err_ret; | |
915 | } else { | |
f0b7d43c BC |
916 | ret = cc2520_write_register(priv, CC2520_AGCCTRL1, 0x11); |
917 | if (ret) | |
918 | goto err_ret; | |
919 | } | |
0da6bc8c | 920 | |
f0b7d43c | 921 | /* Registers default value: section 28.1 in Datasheet */ |
0da6bc8c VB |
922 | ret = cc2520_write_register(priv, CC2520_CCACTRL0, 0x1A); |
923 | if (ret) | |
924 | goto err_ret; | |
925 | ||
926 | ret = cc2520_write_register(priv, CC2520_MDMCTRL0, 0x85); | |
927 | if (ret) | |
928 | goto err_ret; | |
929 | ||
930 | ret = cc2520_write_register(priv, CC2520_MDMCTRL1, 0x14); | |
931 | if (ret) | |
932 | goto err_ret; | |
933 | ||
934 | ret = cc2520_write_register(priv, CC2520_RXCTRL, 0x3f); | |
935 | if (ret) | |
936 | goto err_ret; | |
937 | ||
938 | ret = cc2520_write_register(priv, CC2520_FSCTRL, 0x5a); | |
939 | if (ret) | |
940 | goto err_ret; | |
941 | ||
942 | ret = cc2520_write_register(priv, CC2520_FSCAL1, 0x2b); | |
943 | if (ret) | |
944 | goto err_ret; | |
945 | ||
0da6bc8c VB |
946 | ret = cc2520_write_register(priv, CC2520_ADCTEST0, 0x10); |
947 | if (ret) | |
948 | goto err_ret; | |
949 | ||
950 | ret = cc2520_write_register(priv, CC2520_ADCTEST1, 0x0e); | |
951 | if (ret) | |
952 | goto err_ret; | |
953 | ||
954 | ret = cc2520_write_register(priv, CC2520_ADCTEST2, 0x03); | |
955 | if (ret) | |
956 | goto err_ret; | |
957 | ||
958 | ret = cc2520_write_register(priv, CC2520_FRMCTRL0, 0x60); | |
959 | if (ret) | |
960 | goto err_ret; | |
961 | ||
962 | ret = cc2520_write_register(priv, CC2520_FRMCTRL1, 0x03); | |
963 | if (ret) | |
964 | goto err_ret; | |
965 | ||
966 | ret = cc2520_write_register(priv, CC2520_FRMFILT0, 0x00); | |
967 | if (ret) | |
968 | goto err_ret; | |
969 | ||
970 | ret = cc2520_write_register(priv, CC2520_FIFOPCTRL, 127); | |
971 | if (ret) | |
972 | goto err_ret; | |
973 | ||
974 | return 0; | |
975 | ||
976 | err_ret: | |
977 | return ret; | |
978 | } | |
979 | ||
0da6bc8c VB |
980 | static int cc2520_probe(struct spi_device *spi) |
981 | { | |
982 | struct cc2520_private *priv; | |
0db055c9 | 983 | struct cc2520_platform_data pdata; |
0da6bc8c VB |
984 | int ret; |
985 | ||
5eb9f8ca | 986 | priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL); |
f50f1c37 VB |
987 | if (!priv) |
988 | return -ENOMEM; | |
0da6bc8c VB |
989 | |
990 | spi_set_drvdata(spi, priv); | |
991 | ||
0db055c9 BC |
992 | ret = cc2520_get_platform_data(spi, &pdata); |
993 | if (ret < 0) { | |
0da6bc8c VB |
994 | dev_err(&spi->dev, "no platform data\n"); |
995 | return -EINVAL; | |
996 | } | |
997 | ||
998 | priv->spi = spi; | |
999 | ||
1000 | priv->buf = devm_kzalloc(&spi->dev, | |
1001 | SPI_COMMAND_BUFFER, GFP_KERNEL); | |
f50f1c37 VB |
1002 | if (!priv->buf) |
1003 | return -ENOMEM; | |
0da6bc8c VB |
1004 | |
1005 | mutex_init(&priv->buffer_mutex); | |
1006 | INIT_WORK(&priv->fifop_irqwork, cc2520_fifop_irqwork); | |
1007 | spin_lock_init(&priv->lock); | |
1008 | init_completion(&priv->tx_complete); | |
1009 | ||
1a1bc59c VB |
1010 | /* Assumption that CC2591 is not connected */ |
1011 | priv->amplified = false; | |
1012 | ||
0da6bc8c | 1013 | /* Request all the gpio's */ |
0db055c9 | 1014 | if (!gpio_is_valid(pdata.fifo)) { |
0da6bc8c VB |
1015 | dev_err(&spi->dev, "fifo gpio is not valid\n"); |
1016 | ret = -EINVAL; | |
1017 | goto err_hw_init; | |
1018 | } | |
1019 | ||
0db055c9 | 1020 | ret = devm_gpio_request_one(&spi->dev, pdata.fifo, |
0da6bc8c VB |
1021 | GPIOF_IN, "fifo"); |
1022 | if (ret) | |
1023 | goto err_hw_init; | |
1024 | ||
0db055c9 | 1025 | if (!gpio_is_valid(pdata.cca)) { |
0da6bc8c VB |
1026 | dev_err(&spi->dev, "cca gpio is not valid\n"); |
1027 | ret = -EINVAL; | |
1028 | goto err_hw_init; | |
1029 | } | |
1030 | ||
0db055c9 | 1031 | ret = devm_gpio_request_one(&spi->dev, pdata.cca, |
0da6bc8c VB |
1032 | GPIOF_IN, "cca"); |
1033 | if (ret) | |
1034 | goto err_hw_init; | |
1035 | ||
0db055c9 | 1036 | if (!gpio_is_valid(pdata.fifop)) { |
0da6bc8c VB |
1037 | dev_err(&spi->dev, "fifop gpio is not valid\n"); |
1038 | ret = -EINVAL; | |
1039 | goto err_hw_init; | |
1040 | } | |
1041 | ||
0db055c9 | 1042 | ret = devm_gpio_request_one(&spi->dev, pdata.fifop, |
0da6bc8c VB |
1043 | GPIOF_IN, "fifop"); |
1044 | if (ret) | |
1045 | goto err_hw_init; | |
1046 | ||
0db055c9 | 1047 | if (!gpio_is_valid(pdata.sfd)) { |
0da6bc8c VB |
1048 | dev_err(&spi->dev, "sfd gpio is not valid\n"); |
1049 | ret = -EINVAL; | |
1050 | goto err_hw_init; | |
1051 | } | |
1052 | ||
0db055c9 | 1053 | ret = devm_gpio_request_one(&spi->dev, pdata.sfd, |
0da6bc8c VB |
1054 | GPIOF_IN, "sfd"); |
1055 | if (ret) | |
1056 | goto err_hw_init; | |
1057 | ||
0db055c9 | 1058 | if (!gpio_is_valid(pdata.reset)) { |
0da6bc8c VB |
1059 | dev_err(&spi->dev, "reset gpio is not valid\n"); |
1060 | ret = -EINVAL; | |
1061 | goto err_hw_init; | |
1062 | } | |
1063 | ||
0db055c9 | 1064 | ret = devm_gpio_request_one(&spi->dev, pdata.reset, |
0da6bc8c VB |
1065 | GPIOF_OUT_INIT_LOW, "reset"); |
1066 | if (ret) | |
1067 | goto err_hw_init; | |
1068 | ||
0db055c9 | 1069 | if (!gpio_is_valid(pdata.vreg)) { |
0da6bc8c VB |
1070 | dev_err(&spi->dev, "vreg gpio is not valid\n"); |
1071 | ret = -EINVAL; | |
1072 | goto err_hw_init; | |
1073 | } | |
1074 | ||
0db055c9 | 1075 | ret = devm_gpio_request_one(&spi->dev, pdata.vreg, |
0da6bc8c VB |
1076 | GPIOF_OUT_INIT_LOW, "vreg"); |
1077 | if (ret) | |
1078 | goto err_hw_init; | |
1079 | ||
0db055c9 | 1080 | gpio_set_value(pdata.vreg, HIGH); |
0da6bc8c VB |
1081 | usleep_range(100, 150); |
1082 | ||
0db055c9 | 1083 | gpio_set_value(pdata.reset, HIGH); |
0da6bc8c VB |
1084 | usleep_range(200, 250); |
1085 | ||
1086 | ret = cc2520_hw_init(priv); | |
1087 | if (ret) | |
1088 | goto err_hw_init; | |
1089 | ||
1090 | /* Set up fifop interrupt */ | |
1091 | ret = devm_request_irq(&spi->dev, | |
0db055c9 | 1092 | gpio_to_irq(pdata.fifop), |
0da6bc8c VB |
1093 | cc2520_fifop_isr, |
1094 | IRQF_TRIGGER_RISING, | |
1095 | dev_name(&spi->dev), | |
1096 | priv); | |
1097 | if (ret) { | |
1098 | dev_err(&spi->dev, "could not get fifop irq\n"); | |
1099 | goto err_hw_init; | |
1100 | } | |
1101 | ||
1102 | /* Set up sfd interrupt */ | |
1103 | ret = devm_request_irq(&spi->dev, | |
0db055c9 | 1104 | gpio_to_irq(pdata.sfd), |
0da6bc8c VB |
1105 | cc2520_sfd_isr, |
1106 | IRQF_TRIGGER_FALLING, | |
1107 | dev_name(&spi->dev), | |
1108 | priv); | |
1109 | if (ret) { | |
1110 | dev_err(&spi->dev, "could not get sfd irq\n"); | |
1111 | goto err_hw_init; | |
1112 | } | |
1113 | ||
1114 | ret = cc2520_register(priv); | |
1115 | if (ret) | |
1116 | goto err_hw_init; | |
1117 | ||
1118 | return 0; | |
1119 | ||
1120 | err_hw_init: | |
1121 | mutex_destroy(&priv->buffer_mutex); | |
1122 | flush_work(&priv->fifop_irqwork); | |
0da6bc8c VB |
1123 | return ret; |
1124 | } | |
1125 | ||
1126 | static int cc2520_remove(struct spi_device *spi) | |
1127 | { | |
1128 | struct cc2520_private *priv = spi_get_drvdata(spi); | |
1129 | ||
1130 | mutex_destroy(&priv->buffer_mutex); | |
1131 | flush_work(&priv->fifop_irqwork); | |
1132 | ||
5a504397 AA |
1133 | ieee802154_unregister_hw(priv->hw); |
1134 | ieee802154_free_hw(priv->hw); | |
0da6bc8c VB |
1135 | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | static const struct spi_device_id cc2520_ids[] = { | |
1140 | {"cc2520", }, | |
1141 | {}, | |
1142 | }; | |
1143 | MODULE_DEVICE_TABLE(spi, cc2520_ids); | |
1144 | ||
1145 | static const struct of_device_id cc2520_of_ids[] = { | |
1146 | {.compatible = "ti,cc2520", }, | |
1147 | {}, | |
1148 | }; | |
1149 | MODULE_DEVICE_TABLE(of, cc2520_of_ids); | |
1150 | ||
1151 | /* SPI driver structure */ | |
1152 | static struct spi_driver cc2520_driver = { | |
1153 | .driver = { | |
1154 | .name = "cc2520", | |
0da6bc8c VB |
1155 | .of_match_table = of_match_ptr(cc2520_of_ids), |
1156 | }, | |
1157 | .id_table = cc2520_ids, | |
1158 | .probe = cc2520_probe, | |
1159 | .remove = cc2520_remove, | |
1160 | }; | |
1161 | module_spi_driver(cc2520_driver); | |
1162 | ||
1163 | MODULE_AUTHOR("Varka Bhadram <varkab@cdac.in>"); | |
1164 | MODULE_DESCRIPTION("CC2520 Transceiver Driver"); | |
1165 | MODULE_LICENSE("GPL v2"); |