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97f18414 EL |
1 | /* |
2 | * I2C Link Layer for PN544 HCI based Driver | |
3 | * | |
4 | * Copyright (C) 2012 Intel Corporation. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, 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 | |
98b32dec | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
97f18414 EL |
17 | */ |
18 | ||
17936b43 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
97f18414 EL |
21 | #include <linux/crc-ccitt.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/i2c.h> | |
24 | #include <linux/gpio.h> | |
eda8565a CP |
25 | #include <linux/of_gpio.h> |
26 | #include <linux/of_irq.h> | |
97f18414 EL |
27 | #include <linux/miscdevice.h> |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/delay.h> | |
06c66034 EL |
30 | #include <linux/nfc.h> |
31 | #include <linux/firmware.h> | |
32 | #include <linux/unaligned/access_ok.h> | |
61cdb018 | 33 | #include <linux/platform_data/pn544.h> |
97f18414 EL |
34 | |
35 | #include <net/nfc/hci.h> | |
36 | #include <net/nfc/llc.h> | |
06c66034 | 37 | #include <net/nfc/nfc.h> |
97f18414 EL |
38 | |
39 | #include "pn544.h" | |
40 | ||
41 | #define PN544_I2C_FRAME_HEADROOM 1 | |
42 | #define PN544_I2C_FRAME_TAILROOM 2 | |
43 | ||
44 | /* framing in HCI mode */ | |
45 | #define PN544_HCI_I2C_LLC_LEN 1 | |
46 | #define PN544_HCI_I2C_LLC_CRC 2 | |
47 | #define PN544_HCI_I2C_LLC_LEN_CRC (PN544_HCI_I2C_LLC_LEN + \ | |
48 | PN544_HCI_I2C_LLC_CRC) | |
49 | #define PN544_HCI_I2C_LLC_MIN_SIZE (1 + PN544_HCI_I2C_LLC_LEN_CRC) | |
50 | #define PN544_HCI_I2C_LLC_MAX_PAYLOAD 29 | |
51 | #define PN544_HCI_I2C_LLC_MAX_SIZE (PN544_HCI_I2C_LLC_LEN_CRC + 1 + \ | |
52 | PN544_HCI_I2C_LLC_MAX_PAYLOAD) | |
53 | ||
54 | static struct i2c_device_id pn544_hci_i2c_id_table[] = { | |
55 | {"pn544", 0}, | |
56 | {} | |
57 | }; | |
58 | ||
59 | MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table); | |
60 | ||
61 | #define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c" | |
62 | ||
971d63cf AW |
63 | /* |
64 | * Exposed through the 4 most significant bytes | |
65 | * from the HCI SW_VERSION first byte, a.k.a. | |
66 | * SW RomLib. | |
67 | */ | |
68 | #define PN544_HW_VARIANT_C2 0xa | |
69 | #define PN544_HW_VARIANT_C3 0xb | |
70 | ||
f1dd56fd | 71 | #define PN544_FW_CMD_RESET 0x01 |
06c66034 EL |
72 | #define PN544_FW_CMD_WRITE 0x08 |
73 | #define PN544_FW_CMD_CHECK 0x06 | |
f1dd56fd AW |
74 | #define PN544_FW_CMD_SECURE_WRITE 0x0C |
75 | #define PN544_FW_CMD_SECURE_CHUNK_WRITE 0x0D | |
06c66034 EL |
76 | |
77 | struct pn544_i2c_fw_frame_write { | |
78 | u8 cmd; | |
79 | u16 be_length; | |
80 | u8 be_dest_addr[3]; | |
81 | u16 be_datalen; | |
82 | u8 data[]; | |
83 | } __packed; | |
84 | ||
85 | struct pn544_i2c_fw_frame_check { | |
86 | u8 cmd; | |
87 | u16 be_length; | |
88 | u8 be_start_addr[3]; | |
89 | u16 be_datalen; | |
90 | u16 be_crc; | |
91 | } __packed; | |
92 | ||
93 | struct pn544_i2c_fw_frame_response { | |
94 | u8 status; | |
95 | u16 be_length; | |
96 | } __packed; | |
97 | ||
98 | struct pn544_i2c_fw_blob { | |
99 | u32 be_size; | |
100 | u32 be_destaddr; | |
101 | u8 data[]; | |
102 | }; | |
103 | ||
f1dd56fd AW |
104 | struct pn544_i2c_fw_secure_frame { |
105 | u8 cmd; | |
106 | u16 be_datalen; | |
107 | u8 data[]; | |
108 | } __packed; | |
109 | ||
110 | struct pn544_i2c_fw_secure_blob { | |
111 | u64 header; | |
112 | u8 data[]; | |
113 | }; | |
114 | ||
06c66034 EL |
115 | #define PN544_FW_CMD_RESULT_TIMEOUT 0x01 |
116 | #define PN544_FW_CMD_RESULT_BAD_CRC 0x02 | |
117 | #define PN544_FW_CMD_RESULT_ACCESS_DENIED 0x08 | |
118 | #define PN544_FW_CMD_RESULT_PROTOCOL_ERROR 0x0B | |
119 | #define PN544_FW_CMD_RESULT_INVALID_PARAMETER 0x11 | |
f1dd56fd | 120 | #define PN544_FW_CMD_RESULT_UNSUPPORTED_COMMAND 0x13 |
06c66034 | 121 | #define PN544_FW_CMD_RESULT_INVALID_LENGTH 0x18 |
f1dd56fd AW |
122 | #define PN544_FW_CMD_RESULT_CRYPTOGRAPHIC_ERROR 0x19 |
123 | #define PN544_FW_CMD_RESULT_VERSION_CONDITIONS_ERROR 0x1D | |
124 | #define PN544_FW_CMD_RESULT_MEMORY_ERROR 0x20 | |
125 | #define PN544_FW_CMD_RESULT_CHUNK_OK 0x21 | |
06c66034 | 126 | #define PN544_FW_CMD_RESULT_WRITE_FAILED 0x74 |
f1dd56fd AW |
127 | #define PN544_FW_CMD_RESULT_COMMAND_REJECTED 0xE0 |
128 | #define PN544_FW_CMD_RESULT_CHUNK_ERROR 0xE6 | |
06c66034 EL |
129 | |
130 | #define MIN(X, Y) ((X) < (Y) ? (X) : (Y)) | |
131 | ||
132 | #define PN544_FW_WRITE_BUFFER_MAX_LEN 0x9f7 | |
133 | #define PN544_FW_I2C_MAX_PAYLOAD PN544_HCI_I2C_LLC_MAX_SIZE | |
134 | #define PN544_FW_I2C_WRITE_FRAME_HEADER_LEN 8 | |
135 | #define PN544_FW_I2C_WRITE_DATA_MAX_LEN MIN((PN544_FW_I2C_MAX_PAYLOAD -\ | |
136 | PN544_FW_I2C_WRITE_FRAME_HEADER_LEN),\ | |
137 | PN544_FW_WRITE_BUFFER_MAX_LEN) | |
f1dd56fd AW |
138 | #define PN544_FW_SECURE_CHUNK_WRITE_HEADER_LEN 3 |
139 | #define PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN (PN544_FW_I2C_MAX_PAYLOAD -\ | |
140 | PN544_FW_SECURE_CHUNK_WRITE_HEADER_LEN) | |
141 | #define PN544_FW_SECURE_FRAME_HEADER_LEN 3 | |
142 | #define PN544_FW_SECURE_BLOB_HEADER_LEN 8 | |
06c66034 EL |
143 | |
144 | #define FW_WORK_STATE_IDLE 1 | |
145 | #define FW_WORK_STATE_START 2 | |
146 | #define FW_WORK_STATE_WAIT_WRITE_ANSWER 3 | |
147 | #define FW_WORK_STATE_WAIT_CHECK_ANSWER 4 | |
f1dd56fd | 148 | #define FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER 5 |
06c66034 | 149 | |
97f18414 EL |
150 | struct pn544_i2c_phy { |
151 | struct i2c_client *i2c_dev; | |
152 | struct nfc_hci_dev *hdev; | |
153 | ||
154 | unsigned int gpio_en; | |
155 | unsigned int gpio_irq; | |
156 | unsigned int gpio_fw; | |
157 | unsigned int en_polarity; | |
158 | ||
971d63cf AW |
159 | u8 hw_variant; |
160 | ||
06c66034 EL |
161 | struct work_struct fw_work; |
162 | int fw_work_state; | |
163 | char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; | |
164 | const struct firmware *fw; | |
165 | u32 fw_blob_dest_addr; | |
166 | size_t fw_blob_size; | |
167 | const u8 *fw_blob_data; | |
168 | size_t fw_written; | |
f1dd56fd AW |
169 | size_t fw_size; |
170 | ||
06c66034 EL |
171 | int fw_cmd_result; |
172 | ||
97f18414 | 173 | int powered; |
eab10b71 | 174 | int run_mode; |
97f18414 EL |
175 | |
176 | int hard_fault; /* | |
177 | * < 0 if hardware error occured (e.g. i2c err) | |
178 | * and prevents normal operation. | |
179 | */ | |
180 | }; | |
181 | ||
182 | #define I2C_DUMP_SKB(info, skb) \ | |
183 | do { \ | |
184 | pr_debug("%s:\n", info); \ | |
185 | print_hex_dump(KERN_DEBUG, "i2c: ", DUMP_PREFIX_OFFSET, \ | |
186 | 16, 1, (skb)->data, (skb)->len, 0); \ | |
187 | } while (0) | |
188 | ||
189 | static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy) | |
190 | { | |
191 | int polarity, retry, ret; | |
192 | char rset_cmd[] = { 0x05, 0xF9, 0x04, 0x00, 0xC3, 0xE5 }; | |
193 | int count = sizeof(rset_cmd); | |
194 | ||
17936b43 | 195 | nfc_info(&phy->i2c_dev->dev, "Detecting nfc_en polarity\n"); |
97f18414 EL |
196 | |
197 | /* Disable fw download */ | |
198 | gpio_set_value(phy->gpio_fw, 0); | |
199 | ||
200 | for (polarity = 0; polarity < 2; polarity++) { | |
201 | phy->en_polarity = polarity; | |
202 | retry = 3; | |
203 | while (retry--) { | |
204 | /* power off */ | |
205 | gpio_set_value(phy->gpio_en, !phy->en_polarity); | |
206 | usleep_range(10000, 15000); | |
207 | ||
208 | /* power on */ | |
209 | gpio_set_value(phy->gpio_en, phy->en_polarity); | |
210 | usleep_range(10000, 15000); | |
211 | ||
212 | /* send reset */ | |
213 | dev_dbg(&phy->i2c_dev->dev, "Sending reset cmd\n"); | |
214 | ret = i2c_master_send(phy->i2c_dev, rset_cmd, count); | |
215 | if (ret == count) { | |
17936b43 | 216 | nfc_info(&phy->i2c_dev->dev, |
97f18414 EL |
217 | "nfc_en polarity : active %s\n", |
218 | (polarity == 0 ? "low" : "high")); | |
219 | goto out; | |
220 | } | |
221 | } | |
222 | } | |
223 | ||
17936b43 | 224 | nfc_err(&phy->i2c_dev->dev, |
97f18414 EL |
225 | "Could not detect nfc_en polarity, fallback to active high\n"); |
226 | ||
227 | out: | |
228 | gpio_set_value(phy->gpio_en, !phy->en_polarity); | |
229 | } | |
230 | ||
eab10b71 EL |
231 | static void pn544_hci_i2c_enable_mode(struct pn544_i2c_phy *phy, int run_mode) |
232 | { | |
233 | gpio_set_value(phy->gpio_fw, run_mode == PN544_FW_MODE ? 1 : 0); | |
234 | gpio_set_value(phy->gpio_en, phy->en_polarity); | |
235 | usleep_range(10000, 15000); | |
236 | ||
237 | phy->run_mode = run_mode; | |
238 | } | |
239 | ||
97f18414 EL |
240 | static int pn544_hci_i2c_enable(void *phy_id) |
241 | { | |
242 | struct pn544_i2c_phy *phy = phy_id; | |
243 | ||
17936b43 | 244 | pr_info("%s\n", __func__); |
97f18414 | 245 | |
eab10b71 | 246 | pn544_hci_i2c_enable_mode(phy, PN544_HCI_MODE); |
97f18414 EL |
247 | |
248 | phy->powered = 1; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static void pn544_hci_i2c_disable(void *phy_id) | |
254 | { | |
255 | struct pn544_i2c_phy *phy = phy_id; | |
256 | ||
97f18414 EL |
257 | gpio_set_value(phy->gpio_fw, 0); |
258 | gpio_set_value(phy->gpio_en, !phy->en_polarity); | |
259 | usleep_range(10000, 15000); | |
260 | ||
261 | gpio_set_value(phy->gpio_en, phy->en_polarity); | |
262 | usleep_range(10000, 15000); | |
263 | ||
264 | gpio_set_value(phy->gpio_en, !phy->en_polarity); | |
265 | usleep_range(10000, 15000); | |
266 | ||
267 | phy->powered = 0; | |
268 | } | |
269 | ||
270 | static void pn544_hci_i2c_add_len_crc(struct sk_buff *skb) | |
271 | { | |
272 | u16 crc; | |
273 | int len; | |
274 | ||
275 | len = skb->len + 2; | |
276 | *skb_push(skb, 1) = len; | |
277 | ||
278 | crc = crc_ccitt(0xffff, skb->data, skb->len); | |
279 | crc = ~crc; | |
280 | *skb_put(skb, 1) = crc & 0xff; | |
281 | *skb_put(skb, 1) = crc >> 8; | |
282 | } | |
283 | ||
284 | static void pn544_hci_i2c_remove_len_crc(struct sk_buff *skb) | |
285 | { | |
286 | skb_pull(skb, PN544_I2C_FRAME_HEADROOM); | |
287 | skb_trim(skb, PN544_I2C_FRAME_TAILROOM); | |
288 | } | |
289 | ||
290 | /* | |
291 | * Writing a frame must not return the number of written bytes. | |
292 | * It must return either zero for success, or <0 for error. | |
293 | * In addition, it must not alter the skb | |
294 | */ | |
295 | static int pn544_hci_i2c_write(void *phy_id, struct sk_buff *skb) | |
296 | { | |
297 | int r; | |
298 | struct pn544_i2c_phy *phy = phy_id; | |
299 | struct i2c_client *client = phy->i2c_dev; | |
300 | ||
301 | if (phy->hard_fault != 0) | |
302 | return phy->hard_fault; | |
303 | ||
304 | usleep_range(3000, 6000); | |
305 | ||
306 | pn544_hci_i2c_add_len_crc(skb); | |
307 | ||
308 | I2C_DUMP_SKB("i2c frame written", skb); | |
309 | ||
310 | r = i2c_master_send(client, skb->data, skb->len); | |
311 | ||
312 | if (r == -EREMOTEIO) { /* Retry, chip was in standby */ | |
313 | usleep_range(6000, 10000); | |
314 | r = i2c_master_send(client, skb->data, skb->len); | |
315 | } | |
316 | ||
317 | if (r >= 0) { | |
318 | if (r != skb->len) | |
319 | r = -EREMOTEIO; | |
320 | else | |
321 | r = 0; | |
322 | } | |
323 | ||
324 | pn544_hci_i2c_remove_len_crc(skb); | |
325 | ||
326 | return r; | |
327 | } | |
328 | ||
329 | static int check_crc(u8 *buf, int buflen) | |
330 | { | |
331 | int len; | |
332 | u16 crc; | |
333 | ||
334 | len = buf[0] + 1; | |
335 | crc = crc_ccitt(0xffff, buf, len - 2); | |
336 | crc = ~crc; | |
337 | ||
338 | if (buf[len - 2] != (crc & 0xff) || buf[len - 1] != (crc >> 8)) { | |
17936b43 | 339 | pr_err("CRC error 0x%x != 0x%x 0x%x\n", |
97f18414 | 340 | crc, buf[len - 1], buf[len - 2]); |
17936b43 | 341 | pr_info("%s: BAD CRC\n", __func__); |
97f18414 EL |
342 | print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE, |
343 | 16, 2, buf, buflen, false); | |
344 | return -EPERM; | |
345 | } | |
346 | return 0; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Reads an shdlc frame and returns it in a newly allocated sk_buff. Guarantees | |
351 | * that i2c bus will be flushed and that next read will start on a new frame. | |
352 | * returned skb contains only LLC header and payload. | |
353 | * returns: | |
354 | * -EREMOTEIO : i2c read error (fatal) | |
355 | * -EBADMSG : frame was incorrect and discarded | |
356 | * -ENOMEM : cannot allocate skb, frame dropped | |
357 | */ | |
358 | static int pn544_hci_i2c_read(struct pn544_i2c_phy *phy, struct sk_buff **skb) | |
359 | { | |
360 | int r; | |
361 | u8 len; | |
362 | u8 tmp[PN544_HCI_I2C_LLC_MAX_SIZE - 1]; | |
363 | struct i2c_client *client = phy->i2c_dev; | |
364 | ||
365 | r = i2c_master_recv(client, &len, 1); | |
366 | if (r != 1) { | |
17936b43 | 367 | nfc_err(&client->dev, "cannot read len byte\n"); |
97f18414 EL |
368 | return -EREMOTEIO; |
369 | } | |
370 | ||
371 | if ((len < (PN544_HCI_I2C_LLC_MIN_SIZE - 1)) || | |
372 | (len > (PN544_HCI_I2C_LLC_MAX_SIZE - 1))) { | |
17936b43 | 373 | nfc_err(&client->dev, "invalid len byte\n"); |
97f18414 EL |
374 | r = -EBADMSG; |
375 | goto flush; | |
376 | } | |
377 | ||
378 | *skb = alloc_skb(1 + len, GFP_KERNEL); | |
379 | if (*skb == NULL) { | |
380 | r = -ENOMEM; | |
381 | goto flush; | |
382 | } | |
383 | ||
384 | *skb_put(*skb, 1) = len; | |
385 | ||
386 | r = i2c_master_recv(client, skb_put(*skb, len), len); | |
387 | if (r != len) { | |
388 | kfree_skb(*skb); | |
389 | return -EREMOTEIO; | |
390 | } | |
391 | ||
392 | I2C_DUMP_SKB("i2c frame read", *skb); | |
393 | ||
394 | r = check_crc((*skb)->data, (*skb)->len); | |
395 | if (r != 0) { | |
396 | kfree_skb(*skb); | |
397 | r = -EBADMSG; | |
398 | goto flush; | |
399 | } | |
400 | ||
401 | skb_pull(*skb, 1); | |
402 | skb_trim(*skb, (*skb)->len - 2); | |
403 | ||
404 | usleep_range(3000, 6000); | |
405 | ||
406 | return 0; | |
407 | ||
408 | flush: | |
409 | if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0) | |
410 | r = -EREMOTEIO; | |
411 | ||
412 | usleep_range(3000, 6000); | |
413 | ||
414 | return r; | |
415 | } | |
416 | ||
06c66034 EL |
417 | static int pn544_hci_i2c_fw_read_status(struct pn544_i2c_phy *phy) |
418 | { | |
419 | int r; | |
420 | struct pn544_i2c_fw_frame_response response; | |
421 | struct i2c_client *client = phy->i2c_dev; | |
422 | ||
423 | r = i2c_master_recv(client, (char *) &response, sizeof(response)); | |
424 | if (r != sizeof(response)) { | |
17936b43 | 425 | nfc_err(&client->dev, "cannot read fw status\n"); |
06c66034 EL |
426 | return -EIO; |
427 | } | |
428 | ||
429 | usleep_range(3000, 6000); | |
430 | ||
431 | switch (response.status) { | |
432 | case 0: | |
433 | return 0; | |
f1dd56fd AW |
434 | case PN544_FW_CMD_RESULT_CHUNK_OK: |
435 | return response.status; | |
06c66034 EL |
436 | case PN544_FW_CMD_RESULT_TIMEOUT: |
437 | return -ETIMEDOUT; | |
438 | case PN544_FW_CMD_RESULT_BAD_CRC: | |
439 | return -ENODATA; | |
440 | case PN544_FW_CMD_RESULT_ACCESS_DENIED: | |
441 | return -EACCES; | |
442 | case PN544_FW_CMD_RESULT_PROTOCOL_ERROR: | |
443 | return -EPROTO; | |
444 | case PN544_FW_CMD_RESULT_INVALID_PARAMETER: | |
445 | return -EINVAL; | |
f1dd56fd AW |
446 | case PN544_FW_CMD_RESULT_UNSUPPORTED_COMMAND: |
447 | return -ENOTSUPP; | |
06c66034 EL |
448 | case PN544_FW_CMD_RESULT_INVALID_LENGTH: |
449 | return -EBADMSG; | |
f1dd56fd AW |
450 | case PN544_FW_CMD_RESULT_CRYPTOGRAPHIC_ERROR: |
451 | return -ENOKEY; | |
452 | case PN544_FW_CMD_RESULT_VERSION_CONDITIONS_ERROR: | |
453 | return -EINVAL; | |
454 | case PN544_FW_CMD_RESULT_MEMORY_ERROR: | |
455 | return -ENOMEM; | |
456 | case PN544_FW_CMD_RESULT_COMMAND_REJECTED: | |
457 | return -EACCES; | |
06c66034 | 458 | case PN544_FW_CMD_RESULT_WRITE_FAILED: |
f1dd56fd | 459 | case PN544_FW_CMD_RESULT_CHUNK_ERROR: |
06c66034 EL |
460 | return -EIO; |
461 | default: | |
462 | return -EIO; | |
463 | } | |
464 | } | |
465 | ||
97f18414 EL |
466 | /* |
467 | * Reads an shdlc frame from the chip. This is not as straightforward as it | |
468 | * seems. There are cases where we could loose the frame start synchronization. | |
469 | * The frame format is len-data-crc, and corruption can occur anywhere while | |
470 | * transiting on i2c bus, such that we could read an invalid len. | |
471 | * In order to recover synchronization with the next frame, we must be sure | |
472 | * to read the real amount of data without using the len byte. We do this by | |
473 | * assuming the following: | |
474 | * - the chip will always present only one single complete frame on the bus | |
475 | * before triggering the interrupt | |
476 | * - the chip will not present a new frame until we have completely read | |
477 | * the previous one (or until we have handled the interrupt). | |
478 | * The tricky case is when we read a corrupted len that is less than the real | |
479 | * len. We must detect this here in order to determine that we need to flush | |
480 | * the bus. This is the reason why we check the crc here. | |
481 | */ | |
482 | static irqreturn_t pn544_hci_i2c_irq_thread_fn(int irq, void *phy_id) | |
483 | { | |
484 | struct pn544_i2c_phy *phy = phy_id; | |
485 | struct i2c_client *client; | |
486 | struct sk_buff *skb = NULL; | |
487 | int r; | |
488 | ||
489 | if (!phy || irq != phy->i2c_dev->irq) { | |
490 | WARN_ON_ONCE(1); | |
491 | return IRQ_NONE; | |
492 | } | |
493 | ||
494 | client = phy->i2c_dev; | |
495 | dev_dbg(&client->dev, "IRQ\n"); | |
496 | ||
497 | if (phy->hard_fault != 0) | |
498 | return IRQ_HANDLED; | |
499 | ||
06c66034 EL |
500 | if (phy->run_mode == PN544_FW_MODE) { |
501 | phy->fw_cmd_result = pn544_hci_i2c_fw_read_status(phy); | |
502 | schedule_work(&phy->fw_work); | |
503 | } else { | |
504 | r = pn544_hci_i2c_read(phy, &skb); | |
505 | if (r == -EREMOTEIO) { | |
506 | phy->hard_fault = r; | |
97f18414 | 507 | |
06c66034 | 508 | nfc_hci_recv_frame(phy->hdev, NULL); |
97f18414 | 509 | |
06c66034 EL |
510 | return IRQ_HANDLED; |
511 | } else if ((r == -ENOMEM) || (r == -EBADMSG)) { | |
512 | return IRQ_HANDLED; | |
513 | } | |
97f18414 | 514 | |
06c66034 EL |
515 | nfc_hci_recv_frame(phy->hdev, skb); |
516 | } | |
97f18414 EL |
517 | return IRQ_HANDLED; |
518 | } | |
519 | ||
520 | static struct nfc_phy_ops i2c_phy_ops = { | |
521 | .write = pn544_hci_i2c_write, | |
522 | .enable = pn544_hci_i2c_enable, | |
523 | .disable = pn544_hci_i2c_disable, | |
524 | }; | |
525 | ||
971d63cf AW |
526 | static int pn544_hci_i2c_fw_download(void *phy_id, const char *firmware_name, |
527 | u8 hw_variant) | |
06c66034 EL |
528 | { |
529 | struct pn544_i2c_phy *phy = phy_id; | |
530 | ||
17936b43 | 531 | pr_info("Starting Firmware Download (%s)\n", firmware_name); |
06c66034 EL |
532 | |
533 | strcpy(phy->firmware_name, firmware_name); | |
534 | ||
971d63cf | 535 | phy->hw_variant = hw_variant; |
06c66034 EL |
536 | phy->fw_work_state = FW_WORK_STATE_START; |
537 | ||
538 | schedule_work(&phy->fw_work); | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | static void pn544_hci_i2c_fw_work_complete(struct pn544_i2c_phy *phy, | |
544 | int result) | |
545 | { | |
17936b43 | 546 | pr_info("Firmware Download Complete, result=%d\n", result); |
06c66034 EL |
547 | |
548 | pn544_hci_i2c_disable(phy); | |
549 | ||
550 | phy->fw_work_state = FW_WORK_STATE_IDLE; | |
551 | ||
552 | if (phy->fw) { | |
553 | release_firmware(phy->fw); | |
554 | phy->fw = NULL; | |
555 | } | |
556 | ||
557 | nfc_fw_download_done(phy->hdev->ndev, phy->firmware_name, (u32) -result); | |
558 | } | |
559 | ||
560 | static int pn544_hci_i2c_fw_write_cmd(struct i2c_client *client, u32 dest_addr, | |
561 | const u8 *data, u16 datalen) | |
562 | { | |
563 | u8 frame[PN544_FW_I2C_MAX_PAYLOAD]; | |
564 | struct pn544_i2c_fw_frame_write *framep; | |
565 | u16 params_len; | |
566 | int framelen; | |
567 | int r; | |
568 | ||
569 | if (datalen > PN544_FW_I2C_WRITE_DATA_MAX_LEN) | |
570 | datalen = PN544_FW_I2C_WRITE_DATA_MAX_LEN; | |
571 | ||
572 | framep = (struct pn544_i2c_fw_frame_write *) frame; | |
573 | ||
574 | params_len = sizeof(framep->be_dest_addr) + | |
575 | sizeof(framep->be_datalen) + datalen; | |
576 | framelen = params_len + sizeof(framep->cmd) + | |
577 | sizeof(framep->be_length); | |
578 | ||
579 | framep->cmd = PN544_FW_CMD_WRITE; | |
580 | ||
581 | put_unaligned_be16(params_len, &framep->be_length); | |
582 | ||
583 | framep->be_dest_addr[0] = (dest_addr & 0xff0000) >> 16; | |
584 | framep->be_dest_addr[1] = (dest_addr & 0xff00) >> 8; | |
585 | framep->be_dest_addr[2] = dest_addr & 0xff; | |
586 | ||
587 | put_unaligned_be16(datalen, &framep->be_datalen); | |
588 | ||
589 | memcpy(framep->data, data, datalen); | |
590 | ||
591 | r = i2c_master_send(client, frame, framelen); | |
592 | ||
593 | if (r == framelen) | |
594 | return datalen; | |
595 | else if (r < 0) | |
596 | return r; | |
597 | else | |
598 | return -EIO; | |
599 | } | |
600 | ||
601 | static int pn544_hci_i2c_fw_check_cmd(struct i2c_client *client, u32 start_addr, | |
602 | const u8 *data, u16 datalen) | |
603 | { | |
604 | struct pn544_i2c_fw_frame_check frame; | |
605 | int r; | |
606 | u16 crc; | |
607 | ||
608 | /* calculate local crc for the data we want to check */ | |
609 | crc = crc_ccitt(0xffff, data, datalen); | |
610 | ||
611 | frame.cmd = PN544_FW_CMD_CHECK; | |
612 | ||
613 | put_unaligned_be16(sizeof(frame.be_start_addr) + | |
614 | sizeof(frame.be_datalen) + sizeof(frame.be_crc), | |
615 | &frame.be_length); | |
616 | ||
617 | /* tell the chip the memory region to which our crc applies */ | |
618 | frame.be_start_addr[0] = (start_addr & 0xff0000) >> 16; | |
619 | frame.be_start_addr[1] = (start_addr & 0xff00) >> 8; | |
620 | frame.be_start_addr[2] = start_addr & 0xff; | |
621 | ||
622 | put_unaligned_be16(datalen, &frame.be_datalen); | |
623 | ||
624 | /* | |
625 | * and give our local crc. Chip will calculate its own crc for the | |
626 | * region and compare with ours. | |
627 | */ | |
628 | put_unaligned_be16(crc, &frame.be_crc); | |
629 | ||
630 | r = i2c_master_send(client, (const char *) &frame, sizeof(frame)); | |
631 | ||
632 | if (r == sizeof(frame)) | |
633 | return 0; | |
634 | else if (r < 0) | |
635 | return r; | |
636 | else | |
637 | return -EIO; | |
638 | } | |
639 | ||
640 | static int pn544_hci_i2c_fw_write_chunk(struct pn544_i2c_phy *phy) | |
641 | { | |
642 | int r; | |
643 | ||
644 | r = pn544_hci_i2c_fw_write_cmd(phy->i2c_dev, | |
645 | phy->fw_blob_dest_addr + phy->fw_written, | |
646 | phy->fw_blob_data + phy->fw_written, | |
647 | phy->fw_blob_size - phy->fw_written); | |
648 | if (r < 0) | |
649 | return r; | |
650 | ||
651 | phy->fw_written += r; | |
652 | phy->fw_work_state = FW_WORK_STATE_WAIT_WRITE_ANSWER; | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
f1dd56fd AW |
657 | static int pn544_hci_i2c_fw_secure_write_frame_cmd(struct pn544_i2c_phy *phy, |
658 | const u8 *data, u16 datalen) | |
659 | { | |
660 | u8 buf[PN544_FW_I2C_MAX_PAYLOAD]; | |
661 | struct pn544_i2c_fw_secure_frame *chunk; | |
662 | int chunklen; | |
663 | int r; | |
664 | ||
665 | if (datalen > PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN) | |
666 | datalen = PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN; | |
667 | ||
668 | chunk = (struct pn544_i2c_fw_secure_frame *) buf; | |
669 | ||
670 | chunk->cmd = PN544_FW_CMD_SECURE_CHUNK_WRITE; | |
671 | ||
672 | put_unaligned_be16(datalen, &chunk->be_datalen); | |
673 | ||
674 | memcpy(chunk->data, data, datalen); | |
675 | ||
676 | chunklen = sizeof(chunk->cmd) + sizeof(chunk->be_datalen) + datalen; | |
677 | ||
678 | r = i2c_master_send(phy->i2c_dev, buf, chunklen); | |
679 | ||
680 | if (r == chunklen) | |
681 | return datalen; | |
682 | else if (r < 0) | |
683 | return r; | |
684 | else | |
685 | return -EIO; | |
686 | ||
687 | } | |
688 | ||
689 | static int pn544_hci_i2c_fw_secure_write_frame(struct pn544_i2c_phy *phy) | |
690 | { | |
691 | struct pn544_i2c_fw_secure_frame *framep; | |
692 | int r; | |
693 | ||
694 | framep = (struct pn544_i2c_fw_secure_frame *) phy->fw_blob_data; | |
695 | if (phy->fw_written == 0) | |
696 | phy->fw_blob_size = get_unaligned_be16(&framep->be_datalen) | |
697 | + PN544_FW_SECURE_FRAME_HEADER_LEN; | |
698 | ||
699 | /* Only secure write command can be chunked*/ | |
700 | if (phy->fw_blob_size > PN544_FW_I2C_MAX_PAYLOAD && | |
701 | framep->cmd != PN544_FW_CMD_SECURE_WRITE) | |
702 | return -EINVAL; | |
703 | ||
704 | /* The firmware also have other commands, we just send them directly */ | |
705 | if (phy->fw_blob_size < PN544_FW_I2C_MAX_PAYLOAD) { | |
706 | r = i2c_master_send(phy->i2c_dev, | |
707 | (const char *) phy->fw_blob_data, phy->fw_blob_size); | |
708 | ||
709 | if (r == phy->fw_blob_size) | |
710 | goto exit; | |
711 | else if (r < 0) | |
712 | return r; | |
713 | else | |
714 | return -EIO; | |
715 | } | |
716 | ||
717 | r = pn544_hci_i2c_fw_secure_write_frame_cmd(phy, | |
718 | phy->fw_blob_data + phy->fw_written, | |
719 | phy->fw_blob_size - phy->fw_written); | |
720 | if (r < 0) | |
721 | return r; | |
722 | ||
723 | exit: | |
724 | phy->fw_written += r; | |
725 | phy->fw_work_state = FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER; | |
726 | ||
727 | /* SW reset command will not trig any response from PN544 */ | |
728 | if (framep->cmd == PN544_FW_CMD_RESET) { | |
729 | pn544_hci_i2c_enable_mode(phy, PN544_FW_MODE); | |
730 | phy->fw_cmd_result = 0; | |
731 | schedule_work(&phy->fw_work); | |
732 | } | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
06c66034 EL |
737 | static void pn544_hci_i2c_fw_work(struct work_struct *work) |
738 | { | |
739 | struct pn544_i2c_phy *phy = container_of(work, struct pn544_i2c_phy, | |
740 | fw_work); | |
741 | int r; | |
742 | struct pn544_i2c_fw_blob *blob; | |
f1dd56fd | 743 | struct pn544_i2c_fw_secure_blob *secure_blob; |
06c66034 EL |
744 | |
745 | switch (phy->fw_work_state) { | |
746 | case FW_WORK_STATE_START: | |
747 | pn544_hci_i2c_enable_mode(phy, PN544_FW_MODE); | |
748 | ||
749 | r = request_firmware(&phy->fw, phy->firmware_name, | |
750 | &phy->i2c_dev->dev); | |
751 | if (r < 0) | |
752 | goto exit_state_start; | |
753 | ||
06c66034 | 754 | phy->fw_written = 0; |
f1dd56fd AW |
755 | |
756 | switch (phy->hw_variant) { | |
757 | case PN544_HW_VARIANT_C2: | |
758 | blob = (struct pn544_i2c_fw_blob *) phy->fw->data; | |
759 | phy->fw_blob_size = get_unaligned_be32(&blob->be_size); | |
760 | phy->fw_blob_dest_addr = get_unaligned_be32( | |
761 | &blob->be_destaddr); | |
762 | phy->fw_blob_data = blob->data; | |
763 | ||
764 | r = pn544_hci_i2c_fw_write_chunk(phy); | |
765 | break; | |
766 | case PN544_HW_VARIANT_C3: | |
767 | secure_blob = (struct pn544_i2c_fw_secure_blob *) | |
768 | phy->fw->data; | |
769 | phy->fw_blob_data = secure_blob->data; | |
770 | phy->fw_size = phy->fw->size; | |
771 | r = pn544_hci_i2c_fw_secure_write_frame(phy); | |
772 | break; | |
773 | default: | |
774 | r = -ENOTSUPP; | |
775 | break; | |
776 | } | |
06c66034 EL |
777 | |
778 | exit_state_start: | |
779 | if (r < 0) | |
780 | pn544_hci_i2c_fw_work_complete(phy, r); | |
781 | break; | |
782 | ||
783 | case FW_WORK_STATE_WAIT_WRITE_ANSWER: | |
784 | r = phy->fw_cmd_result; | |
785 | if (r < 0) | |
786 | goto exit_state_wait_write_answer; | |
787 | ||
788 | if (phy->fw_written == phy->fw_blob_size) { | |
789 | r = pn544_hci_i2c_fw_check_cmd(phy->i2c_dev, | |
790 | phy->fw_blob_dest_addr, | |
791 | phy->fw_blob_data, | |
792 | phy->fw_blob_size); | |
793 | if (r < 0) | |
794 | goto exit_state_wait_write_answer; | |
795 | phy->fw_work_state = FW_WORK_STATE_WAIT_CHECK_ANSWER; | |
796 | break; | |
797 | } | |
798 | ||
799 | r = pn544_hci_i2c_fw_write_chunk(phy); | |
800 | ||
801 | exit_state_wait_write_answer: | |
802 | if (r < 0) | |
803 | pn544_hci_i2c_fw_work_complete(phy, r); | |
804 | break; | |
805 | ||
806 | case FW_WORK_STATE_WAIT_CHECK_ANSWER: | |
807 | r = phy->fw_cmd_result; | |
808 | if (r < 0) | |
809 | goto exit_state_wait_check_answer; | |
810 | ||
811 | blob = (struct pn544_i2c_fw_blob *) (phy->fw_blob_data + | |
812 | phy->fw_blob_size); | |
813 | phy->fw_blob_size = get_unaligned_be32(&blob->be_size); | |
814 | if (phy->fw_blob_size != 0) { | |
815 | phy->fw_blob_dest_addr = | |
816 | get_unaligned_be32(&blob->be_destaddr); | |
817 | phy->fw_blob_data = blob->data; | |
818 | ||
819 | phy->fw_written = 0; | |
820 | r = pn544_hci_i2c_fw_write_chunk(phy); | |
821 | } | |
822 | ||
823 | exit_state_wait_check_answer: | |
824 | if (r < 0 || phy->fw_blob_size == 0) | |
825 | pn544_hci_i2c_fw_work_complete(phy, r); | |
826 | break; | |
827 | ||
f1dd56fd AW |
828 | case FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER: |
829 | r = phy->fw_cmd_result; | |
830 | if (r < 0) | |
831 | goto exit_state_wait_secure_write_answer; | |
832 | ||
833 | if (r == PN544_FW_CMD_RESULT_CHUNK_OK) { | |
834 | r = pn544_hci_i2c_fw_secure_write_frame(phy); | |
835 | goto exit_state_wait_secure_write_answer; | |
836 | } | |
837 | ||
838 | if (phy->fw_written == phy->fw_blob_size) { | |
839 | secure_blob = (struct pn544_i2c_fw_secure_blob *) | |
840 | (phy->fw_blob_data + phy->fw_blob_size); | |
841 | phy->fw_size -= phy->fw_blob_size + | |
842 | PN544_FW_SECURE_BLOB_HEADER_LEN; | |
843 | if (phy->fw_size >= PN544_FW_SECURE_BLOB_HEADER_LEN | |
844 | + PN544_FW_SECURE_FRAME_HEADER_LEN) { | |
845 | phy->fw_blob_data = secure_blob->data; | |
846 | ||
847 | phy->fw_written = 0; | |
848 | r = pn544_hci_i2c_fw_secure_write_frame(phy); | |
849 | } | |
850 | } | |
851 | ||
852 | exit_state_wait_secure_write_answer: | |
853 | if (r < 0 || phy->fw_size == 0) | |
854 | pn544_hci_i2c_fw_work_complete(phy, r); | |
855 | break; | |
856 | ||
06c66034 EL |
857 | default: |
858 | break; | |
859 | } | |
860 | } | |
861 | ||
eda8565a CP |
862 | #ifdef CONFIG_OF |
863 | ||
864 | static int pn544_hci_i2c_of_request_resources(struct i2c_client *client) | |
865 | { | |
866 | struct pn544_i2c_phy *phy = i2c_get_clientdata(client); | |
867 | struct device_node *pp; | |
868 | int ret; | |
869 | ||
870 | pp = client->dev.of_node; | |
871 | if (!pp) { | |
872 | ret = -ENODEV; | |
873 | goto err_dt; | |
874 | } | |
875 | ||
876 | /* Obtention of EN GPIO from device tree */ | |
877 | ret = of_get_named_gpio(pp, "enable-gpios", 0); | |
878 | if (ret < 0) { | |
879 | if (ret != -EPROBE_DEFER) | |
880 | nfc_err(&client->dev, | |
881 | "Failed to get EN gpio, error: %d\n", ret); | |
882 | goto err_dt; | |
883 | } | |
884 | phy->gpio_en = ret; | |
885 | ||
886 | /* Configuration of EN GPIO */ | |
887 | ret = gpio_request(phy->gpio_en, "pn544_en"); | |
888 | if (ret) { | |
889 | nfc_err(&client->dev, "Fail EN pin\n"); | |
890 | goto err_dt; | |
891 | } | |
892 | ret = gpio_direction_output(phy->gpio_en, 0); | |
893 | if (ret) { | |
894 | nfc_err(&client->dev, "Fail EN pin direction\n"); | |
895 | goto err_gpio_en; | |
896 | } | |
897 | ||
898 | /* Obtention of FW GPIO from device tree */ | |
899 | ret = of_get_named_gpio(pp, "firmware-gpios", 0); | |
900 | if (ret < 0) { | |
901 | if (ret != -EPROBE_DEFER) | |
902 | nfc_err(&client->dev, | |
903 | "Failed to get FW gpio, error: %d\n", ret); | |
904 | goto err_gpio_en; | |
905 | } | |
906 | phy->gpio_fw = ret; | |
907 | ||
908 | /* Configuration of FW GPIO */ | |
909 | ret = gpio_request(phy->gpio_fw, "pn544_fw"); | |
910 | if (ret) { | |
911 | nfc_err(&client->dev, "Fail FW pin\n"); | |
912 | goto err_gpio_en; | |
913 | } | |
914 | ret = gpio_direction_output(phy->gpio_fw, 0); | |
915 | if (ret) { | |
916 | nfc_err(&client->dev, "Fail FW pin direction\n"); | |
917 | goto err_gpio_fw; | |
918 | } | |
919 | ||
920 | /* IRQ */ | |
921 | ret = irq_of_parse_and_map(pp, 0); | |
922 | if (ret < 0) { | |
923 | nfc_err(&client->dev, | |
924 | "Unable to get irq, error: %d\n", ret); | |
925 | goto err_gpio_fw; | |
926 | } | |
927 | client->irq = ret; | |
928 | ||
929 | return 0; | |
930 | ||
931 | err_gpio_fw: | |
932 | gpio_free(phy->gpio_fw); | |
933 | err_gpio_en: | |
934 | gpio_free(phy->gpio_en); | |
935 | err_dt: | |
936 | return ret; | |
937 | } | |
938 | ||
939 | #else | |
940 | ||
941 | static int pn544_hci_i2c_of_request_resources(struct i2c_client *client) | |
942 | { | |
943 | return -ENODEV; | |
944 | } | |
945 | ||
946 | #endif | |
947 | ||
0fe763c5 GKH |
948 | static int pn544_hci_i2c_probe(struct i2c_client *client, |
949 | const struct i2c_device_id *id) | |
97f18414 EL |
950 | { |
951 | struct pn544_i2c_phy *phy; | |
952 | struct pn544_nfc_platform_data *pdata; | |
953 | int r = 0; | |
954 | ||
955 | dev_dbg(&client->dev, "%s\n", __func__); | |
956 | dev_dbg(&client->dev, "IRQ: %d\n", client->irq); | |
957 | ||
958 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { | |
17936b43 | 959 | nfc_err(&client->dev, "Need I2C_FUNC_I2C\n"); |
97f18414 EL |
960 | return -ENODEV; |
961 | } | |
962 | ||
a0f36536 SO |
963 | phy = devm_kzalloc(&client->dev, sizeof(struct pn544_i2c_phy), |
964 | GFP_KERNEL); | |
97f18414 | 965 | if (!phy) { |
17936b43 | 966 | nfc_err(&client->dev, |
97f18414 | 967 | "Cannot allocate memory for pn544 i2c phy.\n"); |
a0f36536 | 968 | return -ENOMEM; |
97f18414 EL |
969 | } |
970 | ||
06c66034 EL |
971 | INIT_WORK(&phy->fw_work, pn544_hci_i2c_fw_work); |
972 | phy->fw_work_state = FW_WORK_STATE_IDLE; | |
973 | ||
97f18414 EL |
974 | phy->i2c_dev = client; |
975 | i2c_set_clientdata(client, phy); | |
976 | ||
977 | pdata = client->dev.platform_data; | |
97f18414 | 978 | |
eda8565a CP |
979 | /* No platform data, using device tree. */ |
980 | if (!pdata && client->dev.of_node) { | |
981 | r = pn544_hci_i2c_of_request_resources(client); | |
982 | if (r) { | |
983 | nfc_err(&client->dev, "No DT data\n"); | |
984 | return r; | |
985 | } | |
986 | /* Using platform data. */ | |
987 | } else if (pdata) { | |
97f18414 | 988 | |
eda8565a CP |
989 | if (pdata->request_resources == NULL) { |
990 | nfc_err(&client->dev, "request_resources() missing\n"); | |
991 | return -EINVAL; | |
992 | } | |
993 | ||
994 | r = pdata->request_resources(client); | |
995 | if (r) { | |
996 | nfc_err(&client->dev, | |
997 | "Cannot get platform resources\n"); | |
998 | return r; | |
999 | } | |
97f18414 | 1000 | |
eda8565a CP |
1001 | phy->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE); |
1002 | phy->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET); | |
1003 | phy->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ); | |
1004 | } else { | |
1005 | nfc_err(&client->dev, "No platform data\n"); | |
1006 | return -EINVAL; | |
1007 | } | |
97f18414 EL |
1008 | |
1009 | pn544_hci_i2c_platform_init(phy); | |
1010 | ||
1011 | r = request_threaded_irq(client->irq, NULL, pn544_hci_i2c_irq_thread_fn, | |
1012 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
1013 | PN544_HCI_I2C_DRIVER_NAME, phy); | |
1014 | if (r < 0) { | |
17936b43 | 1015 | nfc_err(&client->dev, "Unable to register IRQ handler\n"); |
97f18414 EL |
1016 | goto err_rti; |
1017 | } | |
1018 | ||
1019 | r = pn544_hci_probe(phy, &i2c_phy_ops, LLC_SHDLC_NAME, | |
1020 | PN544_I2C_FRAME_HEADROOM, PN544_I2C_FRAME_TAILROOM, | |
06c66034 EL |
1021 | PN544_HCI_I2C_LLC_MAX_PAYLOAD, |
1022 | pn544_hci_i2c_fw_download, &phy->hdev); | |
97f18414 EL |
1023 | if (r < 0) |
1024 | goto err_hci; | |
1025 | ||
1026 | return 0; | |
1027 | ||
1028 | err_hci: | |
1029 | free_irq(client->irq, phy); | |
1030 | ||
1031 | err_rti: | |
12b25dbf CP |
1032 | if (!pdata) { |
1033 | gpio_free(phy->gpio_en); | |
1034 | gpio_free(phy->gpio_fw); | |
1035 | } else if (pdata->free_resources) { | |
97f18414 | 1036 | pdata->free_resources(); |
12b25dbf | 1037 | } |
97f18414 | 1038 | |
97f18414 EL |
1039 | return r; |
1040 | } | |
1041 | ||
0fe763c5 | 1042 | static int pn544_hci_i2c_remove(struct i2c_client *client) |
97f18414 EL |
1043 | { |
1044 | struct pn544_i2c_phy *phy = i2c_get_clientdata(client); | |
1045 | struct pn544_nfc_platform_data *pdata = client->dev.platform_data; | |
1046 | ||
1047 | dev_dbg(&client->dev, "%s\n", __func__); | |
1048 | ||
06c66034 EL |
1049 | cancel_work_sync(&phy->fw_work); |
1050 | if (phy->fw_work_state != FW_WORK_STATE_IDLE) | |
1051 | pn544_hci_i2c_fw_work_complete(phy, -ENODEV); | |
1052 | ||
97f18414 EL |
1053 | pn544_hci_remove(phy->hdev); |
1054 | ||
1055 | if (phy->powered) | |
1056 | pn544_hci_i2c_disable(phy); | |
1057 | ||
1058 | free_irq(client->irq, phy); | |
eda8565a CP |
1059 | |
1060 | /* No platform data, GPIOs have been requested by this driver */ | |
1061 | if (!pdata) { | |
1062 | gpio_free(phy->gpio_en); | |
1063 | gpio_free(phy->gpio_fw); | |
1064 | /* Using platform data */ | |
1065 | } else if (pdata->free_resources) { | |
97f18414 | 1066 | pdata->free_resources(); |
eda8565a | 1067 | } |
97f18414 | 1068 | |
97f18414 EL |
1069 | return 0; |
1070 | } | |
1071 | ||
eda8565a CP |
1072 | static const struct of_device_id of_pn544_i2c_match[] = { |
1073 | { .compatible = "nxp,pn544-i2c", }, | |
1074 | {}, | |
1075 | }; | |
1076 | MODULE_DEVICE_TABLE(of, of_pn544_i2c_match); | |
1077 | ||
97f18414 EL |
1078 | static struct i2c_driver pn544_hci_i2c_driver = { |
1079 | .driver = { | |
1080 | .name = PN544_HCI_I2C_DRIVER_NAME, | |
eda8565a CP |
1081 | .owner = THIS_MODULE, |
1082 | .of_match_table = of_match_ptr(of_pn544_i2c_match), | |
97f18414 EL |
1083 | }, |
1084 | .probe = pn544_hci_i2c_probe, | |
1085 | .id_table = pn544_hci_i2c_id_table, | |
0fe763c5 | 1086 | .remove = pn544_hci_i2c_remove, |
97f18414 EL |
1087 | }; |
1088 | ||
234d4d6b | 1089 | module_i2c_driver(pn544_hci_i2c_driver); |
97f18414 EL |
1090 | |
1091 | MODULE_LICENSE("GPL"); | |
1092 | MODULE_DESCRIPTION(DRIVER_DESC); |