1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Driver for Microchip USB251xB USB 2.0 Hi-Speed Hub Controller
4 * Configuration via SMBus.
5 *
6 * Copyright (c) 2017 SKIDATA AG
7 *
8 * This work is based on the USB3503 driver by Dongjin Kim and
9 * a not-accepted patch by Fabien Lahoudere, see:
10 * https://patchwork.kernel.org/patch/9257715/
11 */
12
13 #include <linux/delay.h>
14 #include <linux/gpio/consumer.h>
15 #include <linux/i2c.h>
16 #include <linux/module.h>
17 #include <linux/nls.h>
18 #include <linux/of_device.h>
19 #include <linux/slab.h>
20
21 /* Internal Register Set Addresses & Default Values acc. to DS00001692C */
22 #define USB251XB_ADDR_VENDOR_ID_LSB 0x00
23 #define USB251XB_ADDR_VENDOR_ID_MSB 0x01
24 #define USB251XB_DEF_VENDOR_ID 0x0424
25
26 #define USB251XB_ADDR_PRODUCT_ID_LSB 0x02
27 #define USB251XB_ADDR_PRODUCT_ID_MSB 0x03
28 #define USB251XB_DEF_PRODUCT_ID_12 0x2512 /* USB2512B/12Bi */
29 #define USB251XB_DEF_PRODUCT_ID_13 0x2513 /* USB2513B/13Bi */
30 #define USB251XB_DEF_PRODUCT_ID_14 0x2514 /* USB2514B/14Bi */
31 #define USB251XB_DEF_PRODUCT_ID_17 0x2517 /* USB2517/17i */
32
33 #define USB251XB_ADDR_DEVICE_ID_LSB 0x04
34 #define USB251XB_ADDR_DEVICE_ID_MSB 0x05
35 #define USB251XB_DEF_DEVICE_ID 0x0BB3
36
37 #define USB251XB_ADDR_CONFIG_DATA_1 0x06
38 #define USB251XB_DEF_CONFIG_DATA_1 0x9B
39 #define USB251XB_ADDR_CONFIG_DATA_2 0x07
40 #define USB251XB_DEF_CONFIG_DATA_2 0x20
41 #define USB251XB_ADDR_CONFIG_DATA_3 0x08
42 #define USB251XB_DEF_CONFIG_DATA_3 0x02
43
44 #define USB251XB_ADDR_NON_REMOVABLE_DEVICES 0x09
45 #define USB251XB_DEF_NON_REMOVABLE_DEVICES 0x00
46
47 #define USB251XB_ADDR_PORT_DISABLE_SELF 0x0A
48 #define USB251XB_DEF_PORT_DISABLE_SELF 0x00
49 #define USB251XB_ADDR_PORT_DISABLE_BUS 0x0B
50 #define USB251XB_DEF_PORT_DISABLE_BUS 0x00
51
52 #define USB251XB_ADDR_MAX_POWER_SELF 0x0C
53 #define USB251XB_DEF_MAX_POWER_SELF 0x01
54 #define USB251XB_ADDR_MAX_POWER_BUS 0x0D
55 #define USB251XB_DEF_MAX_POWER_BUS 0x32
56
57 #define USB251XB_ADDR_MAX_CURRENT_SELF 0x0E
58 #define USB251XB_DEF_MAX_CURRENT_SELF 0x01
59 #define USB251XB_ADDR_MAX_CURRENT_BUS 0x0F
60 #define USB251XB_DEF_MAX_CURRENT_BUS 0x32
61
62 #define USB251XB_ADDR_POWER_ON_TIME 0x10
63 #define USB251XB_DEF_POWER_ON_TIME 0x32
64
65 #define USB251XB_ADDR_LANGUAGE_ID_HIGH 0x11
66 #define USB251XB_ADDR_LANGUAGE_ID_LOW 0x12
67 #define USB251XB_DEF_LANGUAGE_ID 0x0000
68
69 #define USB251XB_STRING_BUFSIZE 62
70 #define USB251XB_ADDR_MANUFACTURER_STRING_LEN 0x13
71 #define USB251XB_ADDR_MANUFACTURER_STRING 0x16
72 #define USB251XB_DEF_MANUFACTURER_STRING "Microchip"
73
74 #define USB251XB_ADDR_PRODUCT_STRING_LEN 0x14
75 #define USB251XB_ADDR_PRODUCT_STRING 0x54
76 #define USB251XB_DEF_PRODUCT_STRING "USB251xB/xBi/7i"
77
78 #define USB251XB_ADDR_SERIAL_STRING_LEN 0x15
79 #define USB251XB_ADDR_SERIAL_STRING 0x92
80 #define USB251XB_DEF_SERIAL_STRING ""
81
82 #define USB251XB_ADDR_BATTERY_CHARGING_ENABLE 0xD0
83 #define USB251XB_DEF_BATTERY_CHARGING_ENABLE 0x00
84
85 #define USB251XB_ADDR_BOOST_UP 0xF6
86 #define USB251XB_DEF_BOOST_UP 0x00
87 #define USB251XB_ADDR_BOOST_57 0xF7
88 #define USB251XB_DEF_BOOST_57 0x00
89 #define USB251XB_ADDR_BOOST_14 0xF8
90 #define USB251XB_DEF_BOOST_14 0x00
91
92 #define USB251XB_ADDR_PORT_SWAP 0xFA
93 #define USB251XB_DEF_PORT_SWAP 0x00
94
95 #define USB251XB_ADDR_PORT_MAP_12 0xFB
96 #define USB251XB_DEF_PORT_MAP_12 0x00
97 #define USB251XB_ADDR_PORT_MAP_34 0xFC
98 #define USB251XB_DEF_PORT_MAP_34 0x00 /* USB251{3B/i,4B/i,7/i} only */
99 #define USB251XB_ADDR_PORT_MAP_56 0xFD
100 #define USB251XB_DEF_PORT_MAP_56 0x00 /* USB2517/i only */
101 #define USB251XB_ADDR_PORT_MAP_7 0xFE
102 #define USB251XB_DEF_PORT_MAP_7 0x00 /* USB2517/i only */
103
104 #define USB251XB_ADDR_STATUS_COMMAND 0xFF
105 #define USB251XB_STATUS_COMMAND_SMBUS_DOWN 0x04
106 #define USB251XB_STATUS_COMMAND_RESET 0x02
107 #define USB251XB_STATUS_COMMAND_ATTACH 0x01
108
109 #define USB251XB_I2C_REG_SZ 0x100
110 #define USB251XB_I2C_WRITE_SZ 0x10
111
112 #define DRIVER_NAME "usb251xb"
113 #define DRIVER_DESC "Microchip USB 2.0 Hi-Speed Hub Controller"
114
115 struct usb251xb {
116 struct device *dev;
117 struct i2c_client *i2c;
118 u8 skip_config;
119 struct gpio_desc *gpio_reset;
120 u16 vendor_id;
121 u16 product_id;
122 u16 device_id;
123 u8 conf_data1;
124 u8 conf_data2;
125 u8 conf_data3;
126 u8 non_rem_dev;
127 u8 port_disable_sp;
128 u8 port_disable_bp;
129 u8 max_power_sp;
130 u8 max_power_bp;
131 u8 max_current_sp;
132 u8 max_current_bp;
133 u8 power_on_time;
134 u16 lang_id;
135 u8 manufacturer_len;
136 u8 product_len;
137 u8 serial_len;
138 char manufacturer[USB251XB_STRING_BUFSIZE];
139 char product[USB251XB_STRING_BUFSIZE];
140 char serial[USB251XB_STRING_BUFSIZE];
141 u8 bat_charge_en;
142 u8 boost_up;
143 u8 boost_57;
144 u8 boost_14;
145 u8 port_swap;
146 u8 port_map12;
147 u8 port_map34;
148 u8 port_map56;
149 u8 port_map7;
150 u8 status;
151 };
152
153 struct usb251xb_data {
154 u16 product_id;
155 u8 port_cnt;
156 bool led_support;
157 bool bat_support;
158 char product_str[USB251XB_STRING_BUFSIZE / 2]; /* ASCII string */
159 };
160
161 static const struct usb251xb_data usb2512b_data = {
162 .product_id = 0x2512,
163 .port_cnt = 2,
164 .led_support = false,
165 .bat_support = true,
166 .product_str = "USB2512B",
167 };
168
169 static const struct usb251xb_data usb2512bi_data = {
170 .product_id = 0x2512,
171 .port_cnt = 2,
172 .led_support = false,
173 .bat_support = true,
174 .product_str = "USB2512Bi",
175 };
176
177 static const struct usb251xb_data usb2513b_data = {
178 .product_id = 0x2513,
179 .port_cnt = 3,
180 .led_support = false,
181 .bat_support = true,
182 .product_str = "USB2513B",
183 };
184
185 static const struct usb251xb_data usb2513bi_data = {
186 .product_id = 0x2513,
187 .port_cnt = 3,
188 .led_support = false,
189 .bat_support = true,
190 .product_str = "USB2513Bi",
191 };
192
193 static const struct usb251xb_data usb2514b_data = {
194 .product_id = 0x2514,
195 .port_cnt = 4,
196 .led_support = false,
197 .bat_support = true,
198 .product_str = "USB2514B",
199 };
200
201 static const struct usb251xb_data usb2514bi_data = {
202 .product_id = 0x2514,
203 .port_cnt = 4,
204 .led_support = false,
205 .bat_support = true,
206 .product_str = "USB2514Bi",
207 };
208
209 static const struct usb251xb_data usb2517_data = {
210 .product_id = 0x2517,
211 .port_cnt = 7,
212 .led_support = true,
213 .bat_support = false,
214 .product_str = "USB2517",
215 };
216
217 static const struct usb251xb_data usb2517i_data = {
218 .product_id = 0x2517,
219 .port_cnt = 7,
220 .led_support = true,
221 .bat_support = false,
222 .product_str = "USB2517i",
223 };
224
usb251xb_reset(struct usb251xb * hub,int state)225 static void usb251xb_reset(struct usb251xb *hub, int state)
226 {
227 if (!hub->gpio_reset)
228 return;
229
230 gpiod_set_value_cansleep(hub->gpio_reset, state);
231
232 /* wait for hub recovery/stabilization */
233 if (!state)
234 usleep_range(500, 750); /* >=500us at power on */
235 else
236 usleep_range(1, 10); /* >=1us at power down */
237 }
238
usb251xb_connect(struct usb251xb * hub)239 static int usb251xb_connect(struct usb251xb *hub)
240 {
241 struct device *dev = hub->dev;
242 int err, i;
243 char i2c_wb[USB251XB_I2C_REG_SZ];
244
245 memset(i2c_wb, 0, USB251XB_I2C_REG_SZ);
246
247 if (hub->skip_config) {
248 dev_info(dev, "Skip hub configuration, only attach.\n");
249 i2c_wb[0] = 0x01;
250 i2c_wb[1] = USB251XB_STATUS_COMMAND_ATTACH;
251
252 usb251xb_reset(hub, 0);
253
254 err = i2c_smbus_write_i2c_block_data(hub->i2c,
255 USB251XB_ADDR_STATUS_COMMAND, 2, i2c_wb);
256 if (err) {
257 dev_err(dev, "attaching hub failed: %d\n", err);
258 return err;
259 }
260 return 0;
261 }
262
263 i2c_wb[USB251XB_ADDR_VENDOR_ID_MSB] = (hub->vendor_id >> 8) & 0xFF;
264 i2c_wb[USB251XB_ADDR_VENDOR_ID_LSB] = hub->vendor_id & 0xFF;
265 i2c_wb[USB251XB_ADDR_PRODUCT_ID_MSB] = (hub->product_id >> 8) & 0xFF;
266 i2c_wb[USB251XB_ADDR_PRODUCT_ID_LSB] = hub->product_id & 0xFF;
267 i2c_wb[USB251XB_ADDR_DEVICE_ID_MSB] = (hub->device_id >> 8) & 0xFF;
268 i2c_wb[USB251XB_ADDR_DEVICE_ID_LSB] = hub->device_id & 0xFF;
269 i2c_wb[USB251XB_ADDR_CONFIG_DATA_1] = hub->conf_data1;
270 i2c_wb[USB251XB_ADDR_CONFIG_DATA_2] = hub->conf_data2;
271 i2c_wb[USB251XB_ADDR_CONFIG_DATA_3] = hub->conf_data3;
272 i2c_wb[USB251XB_ADDR_NON_REMOVABLE_DEVICES] = hub->non_rem_dev;
273 i2c_wb[USB251XB_ADDR_PORT_DISABLE_SELF] = hub->port_disable_sp;
274 i2c_wb[USB251XB_ADDR_PORT_DISABLE_BUS] = hub->port_disable_bp;
275 i2c_wb[USB251XB_ADDR_MAX_POWER_SELF] = hub->max_power_sp;
276 i2c_wb[USB251XB_ADDR_MAX_POWER_BUS] = hub->max_power_bp;
277 i2c_wb[USB251XB_ADDR_MAX_CURRENT_SELF] = hub->max_current_sp;
278 i2c_wb[USB251XB_ADDR_MAX_CURRENT_BUS] = hub->max_current_bp;
279 i2c_wb[USB251XB_ADDR_POWER_ON_TIME] = hub->power_on_time;
280 i2c_wb[USB251XB_ADDR_LANGUAGE_ID_HIGH] = (hub->lang_id >> 8) & 0xFF;
281 i2c_wb[USB251XB_ADDR_LANGUAGE_ID_LOW] = hub->lang_id & 0xFF;
282 i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING_LEN] = hub->manufacturer_len;
283 i2c_wb[USB251XB_ADDR_PRODUCT_STRING_LEN] = hub->product_len;
284 i2c_wb[USB251XB_ADDR_SERIAL_STRING_LEN] = hub->serial_len;
285 memcpy(&i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING], hub->manufacturer,
286 USB251XB_STRING_BUFSIZE);
287 memcpy(&i2c_wb[USB251XB_ADDR_SERIAL_STRING], hub->serial,
288 USB251XB_STRING_BUFSIZE);
289 memcpy(&i2c_wb[USB251XB_ADDR_PRODUCT_STRING], hub->product,
290 USB251XB_STRING_BUFSIZE);
291 i2c_wb[USB251XB_ADDR_BATTERY_CHARGING_ENABLE] = hub->bat_charge_en;
292 i2c_wb[USB251XB_ADDR_BOOST_UP] = hub->boost_up;
293 i2c_wb[USB251XB_ADDR_BOOST_57] = hub->boost_57;
294 i2c_wb[USB251XB_ADDR_BOOST_14] = hub->boost_14;
295 i2c_wb[USB251XB_ADDR_PORT_SWAP] = hub->port_swap;
296 i2c_wb[USB251XB_ADDR_PORT_MAP_12] = hub->port_map12;
297 i2c_wb[USB251XB_ADDR_PORT_MAP_34] = hub->port_map34;
298 i2c_wb[USB251XB_ADDR_PORT_MAP_56] = hub->port_map56;
299 i2c_wb[USB251XB_ADDR_PORT_MAP_7] = hub->port_map7;
300 i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH;
301
302 usb251xb_reset(hub, 0);
303
304 /* write registers */
305 for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) {
306 int offset = i * USB251XB_I2C_WRITE_SZ;
307 char wbuf[USB251XB_I2C_WRITE_SZ + 1];
308
309 /* The first data byte transferred tells the hub how many data
310 * bytes will follow (byte count).
311 */
312 wbuf[0] = USB251XB_I2C_WRITE_SZ;
313 memcpy(&wbuf[1], &i2c_wb[offset], USB251XB_I2C_WRITE_SZ);
314
315 dev_dbg(dev, "writing %d byte block %d to 0x%02X\n",
316 USB251XB_I2C_WRITE_SZ, i, offset);
317
318 err = i2c_smbus_write_i2c_block_data(hub->i2c, offset,
319 USB251XB_I2C_WRITE_SZ + 1,
320 wbuf);
321 if (err)
322 goto out_err;
323 }
324
325 dev_info(dev, "Hub configuration was successful.\n");
326 return 0;
327
328 out_err:
329 dev_err(dev, "configuring block %d failed: %d\n", i, err);
330 return err;
331 }
332
333 #ifdef CONFIG_OF
usb251xb_get_ofdata(struct usb251xb * hub,struct usb251xb_data * data)334 static int usb251xb_get_ofdata(struct usb251xb *hub,
335 struct usb251xb_data *data)
336 {
337 struct device *dev = hub->dev;
338 struct device_node *np = dev->of_node;
339 int len, err, i;
340 u32 property_u32 = 0;
341 const u32 *cproperty_u32;
342 const char *cproperty_char;
343 char str[USB251XB_STRING_BUFSIZE / 2];
344
345 if (!np) {
346 dev_err(dev, "failed to get ofdata\n");
347 return -ENODEV;
348 }
349
350 if (of_get_property(np, "skip-config", NULL))
351 hub->skip_config = 1;
352 else
353 hub->skip_config = 0;
354
355 hub->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
356 if (PTR_ERR(hub->gpio_reset) == -EPROBE_DEFER) {
357 return -EPROBE_DEFER;
358 } else if (IS_ERR(hub->gpio_reset)) {
359 err = PTR_ERR(hub->gpio_reset);
360 dev_err(dev, "unable to request GPIO reset pin (%d)\n", err);
361 return err;
362 }
363
364 if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1))
365 hub->vendor_id = USB251XB_DEF_VENDOR_ID;
366
367 if (of_property_read_u16_array(np, "product-id",
368 &hub->product_id, 1))
369 hub->product_id = data->product_id;
370
371 if (of_property_read_u16_array(np, "device-id", &hub->device_id, 1))
372 hub->device_id = USB251XB_DEF_DEVICE_ID;
373
374 hub->conf_data1 = USB251XB_DEF_CONFIG_DATA_1;
375 if (of_get_property(np, "self-powered", NULL)) {
376 hub->conf_data1 |= BIT(7);
377
378 /* Configure Over-Current sens when self-powered */
379 hub->conf_data1 &= ~BIT(2);
380 if (of_get_property(np, "ganged-sensing", NULL))
381 hub->conf_data1 &= ~BIT(1);
382 else if (of_get_property(np, "individual-sensing", NULL))
383 hub->conf_data1 |= BIT(1);
384 } else if (of_get_property(np, "bus-powered", NULL)) {
385 hub->conf_data1 &= ~BIT(7);
386
387 /* Disable Over-Current sense when bus-powered */
388 hub->conf_data1 |= BIT(2);
389 }
390
391 if (of_get_property(np, "disable-hi-speed", NULL))
392 hub->conf_data1 |= BIT(5);
393
394 if (of_get_property(np, "multi-tt", NULL))
395 hub->conf_data1 |= BIT(4);
396 else if (of_get_property(np, "single-tt", NULL))
397 hub->conf_data1 &= ~BIT(4);
398
399 if (of_get_property(np, "disable-eop", NULL))
400 hub->conf_data1 |= BIT(3);
401
402 if (of_get_property(np, "individual-port-switching", NULL))
403 hub->conf_data1 |= BIT(0);
404 else if (of_get_property(np, "ganged-port-switching", NULL))
405 hub->conf_data1 &= ~BIT(0);
406
407 hub->conf_data2 = USB251XB_DEF_CONFIG_DATA_2;
408 if (of_get_property(np, "dynamic-power-switching", NULL))
409 hub->conf_data2 |= BIT(7);
410
411 if (!of_property_read_u32(np, "oc-delay-us", &property_u32)) {
412 if (property_u32 == 100) {
413 /* 100 us*/
414 hub->conf_data2 &= ~BIT(5);
415 hub->conf_data2 &= ~BIT(4);
416 } else if (property_u32 == 4000) {
417 /* 4 ms */
418 hub->conf_data2 &= ~BIT(5);
419 hub->conf_data2 |= BIT(4);
420 } else if (property_u32 == 16000) {
421 /* 16 ms */
422 hub->conf_data2 |= BIT(5);
423 hub->conf_data2 |= BIT(4);
424 } else {
425 /* 8 ms (DEFAULT) */
426 hub->conf_data2 |= BIT(5);
427 hub->conf_data2 &= ~BIT(4);
428 }
429 }
430
431 if (of_get_property(np, "compound-device", NULL))
432 hub->conf_data2 |= BIT(3);
433
434 hub->conf_data3 = USB251XB_DEF_CONFIG_DATA_3;
435 if (of_get_property(np, "port-mapping-mode", NULL))
436 hub->conf_data3 |= BIT(3);
437
438 if (data->led_support && of_get_property(np, "led-usb-mode", NULL))
439 hub->conf_data3 &= ~BIT(1);
440
441 if (of_get_property(np, "string-support", NULL))
442 hub->conf_data3 |= BIT(0);
443
444 hub->non_rem_dev = USB251XB_DEF_NON_REMOVABLE_DEVICES;
445 cproperty_u32 = of_get_property(np, "non-removable-ports", &len);
446 if (cproperty_u32 && (len / sizeof(u32)) > 0) {
447 for (i = 0; i < len / sizeof(u32); i++) {
448 u32 port = be32_to_cpu(cproperty_u32[i]);
449
450 if ((port >= 1) && (port <= data->port_cnt))
451 hub->non_rem_dev |= BIT(port);
452 else
453 dev_warn(dev, "NRD port %u doesn't exist\n",
454 port);
455 }
456 }
457
458 hub->port_disable_sp = USB251XB_DEF_PORT_DISABLE_SELF;
459 cproperty_u32 = of_get_property(np, "sp-disabled-ports", &len);
460 if (cproperty_u32 && (len / sizeof(u32)) > 0) {
461 for (i = 0; i < len / sizeof(u32); i++) {
462 u32 port = be32_to_cpu(cproperty_u32[i]);
463
464 if ((port >= 1) && (port <= data->port_cnt))
465 hub->port_disable_sp |= BIT(port);
466 else
467 dev_warn(dev, "PDS port %u doesn't exist\n",
468 port);
469 }
470 }
471
472 hub->port_disable_bp = USB251XB_DEF_PORT_DISABLE_BUS;
473 cproperty_u32 = of_get_property(np, "bp-disabled-ports", &len);
474 if (cproperty_u32 && (len / sizeof(u32)) > 0) {
475 for (i = 0; i < len / sizeof(u32); i++) {
476 u32 port = be32_to_cpu(cproperty_u32[i]);
477
478 if ((port >= 1) && (port <= data->port_cnt))
479 hub->port_disable_bp |= BIT(port);
480 else
481 dev_warn(dev, "PDB port %u doesn't exist\n",
482 port);
483 }
484 }
485
486 hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
487 if (!of_property_read_u32(np, "sp-max-total-current-microamp",
488 &property_u32))
489 hub->max_power_sp = min_t(u8, property_u32 / 2000, 50);
490
491 hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS;
492 if (!of_property_read_u32(np, "bp-max-total-current-microamp",
493 &property_u32))
494 hub->max_power_bp = min_t(u8, property_u32 / 2000, 255);
495
496 hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF;
497 if (!of_property_read_u32(np, "sp-max-removable-current-microamp",
498 &property_u32))
499 hub->max_current_sp = min_t(u8, property_u32 / 2000, 50);
500
501 hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS;
502 if (!of_property_read_u32(np, "bp-max-removable-current-microamp",
503 &property_u32))
504 hub->max_current_bp = min_t(u8, property_u32 / 2000, 255);
505
506 hub->power_on_time = USB251XB_DEF_POWER_ON_TIME;
507 if (!of_property_read_u32(np, "power-on-time-ms", &property_u32))
508 hub->power_on_time = min_t(u8, property_u32 / 2, 255);
509
510 if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1))
511 hub->lang_id = USB251XB_DEF_LANGUAGE_ID;
512
513 cproperty_char = of_get_property(np, "manufacturer", NULL);
514 strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING,
515 sizeof(str));
516 hub->manufacturer_len = strlen(str) & 0xFF;
517 memset(hub->manufacturer, 0, USB251XB_STRING_BUFSIZE);
518 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
519 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
520 (wchar_t *)hub->manufacturer,
521 USB251XB_STRING_BUFSIZE);
522
523 cproperty_char = of_get_property(np, "product", NULL);
524 strlcpy(str, cproperty_char ? : data->product_str, sizeof(str));
525 hub->product_len = strlen(str) & 0xFF;
526 memset(hub->product, 0, USB251XB_STRING_BUFSIZE);
527 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
528 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
529 (wchar_t *)hub->product,
530 USB251XB_STRING_BUFSIZE);
531
532 cproperty_char = of_get_property(np, "serial", NULL);
533 strlcpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING,
534 sizeof(str));
535 hub->serial_len = strlen(str) & 0xFF;
536 memset(hub->serial, 0, USB251XB_STRING_BUFSIZE);
537 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
538 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
539 (wchar_t *)hub->serial,
540 USB251XB_STRING_BUFSIZE);
541
542 /* The following parameters are currently not exposed to devicetree, but
543 * may be as soon as needed.
544 */
545 hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE;
546 hub->boost_up = USB251XB_DEF_BOOST_UP;
547 hub->boost_57 = USB251XB_DEF_BOOST_57;
548 hub->boost_14 = USB251XB_DEF_BOOST_14;
549 hub->port_swap = USB251XB_DEF_PORT_SWAP;
550 hub->port_map12 = USB251XB_DEF_PORT_MAP_12;
551 hub->port_map34 = USB251XB_DEF_PORT_MAP_34;
552 hub->port_map56 = USB251XB_DEF_PORT_MAP_56;
553 hub->port_map7 = USB251XB_DEF_PORT_MAP_7;
554
555 return 0;
556 }
557
558 static const struct of_device_id usb251xb_of_match[] = {
559 {
560 .compatible = "microchip,usb2512b",
561 .data = &usb2512b_data,
562 }, {
563 .compatible = "microchip,usb2512bi",
564 .data = &usb2512bi_data,
565 }, {
566 .compatible = "microchip,usb2513b",
567 .data = &usb2513b_data,
568 }, {
569 .compatible = "microchip,usb2513bi",
570 .data = &usb2513bi_data,
571 }, {
572 .compatible = "microchip,usb2514b",
573 .data = &usb2514b_data,
574 }, {
575 .compatible = "microchip,usb2514bi",
576 .data = &usb2514bi_data,
577 }, {
578 .compatible = "microchip,usb2517",
579 .data = &usb2517_data,
580 }, {
581 .compatible = "microchip,usb2517i",
582 .data = &usb2517i_data,
583 }, {
584 /* sentinel */
585 }
586 };
587 MODULE_DEVICE_TABLE(of, usb251xb_of_match);
588 #else /* CONFIG_OF */
usb251xb_get_ofdata(struct usb251xb * hub,struct usb251xb_data * data)589 static int usb251xb_get_ofdata(struct usb251xb *hub,
590 struct usb251xb_data *data)
591 {
592 return 0;
593 }
594 #endif /* CONFIG_OF */
595
usb251xb_probe(struct usb251xb * hub)596 static int usb251xb_probe(struct usb251xb *hub)
597 {
598 struct device *dev = hub->dev;
599 struct device_node *np = dev->of_node;
600 const struct of_device_id *of_id = of_match_device(usb251xb_of_match,
601 dev);
602 int err;
603
604 if (np) {
605 err = usb251xb_get_ofdata(hub,
606 (struct usb251xb_data *)of_id->data);
607 if (err) {
608 dev_err(dev, "failed to get ofdata: %d\n", err);
609 return err;
610 }
611 }
612
613 err = usb251xb_connect(hub);
614 if (err) {
615 dev_err(dev, "Failed to connect hub (%d)\n", err);
616 return err;
617 }
618
619 dev_info(dev, "Hub probed successfully\n");
620
621 return 0;
622 }
623
usb251xb_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)624 static int usb251xb_i2c_probe(struct i2c_client *i2c,
625 const struct i2c_device_id *id)
626 {
627 struct usb251xb *hub;
628
629 hub = devm_kzalloc(&i2c->dev, sizeof(struct usb251xb), GFP_KERNEL);
630 if (!hub)
631 return -ENOMEM;
632
633 i2c_set_clientdata(i2c, hub);
634 hub->dev = &i2c->dev;
635 hub->i2c = i2c;
636
637 return usb251xb_probe(hub);
638 }
639
640 static const struct i2c_device_id usb251xb_id[] = {
641 { "usb2512b", 0 },
642 { "usb2512bi", 0 },
643 { "usb2513b", 0 },
644 { "usb2513bi", 0 },
645 { "usb2514b", 0 },
646 { "usb2514bi", 0 },
647 { "usb2517", 0 },
648 { "usb2517i", 0 },
649 { /* sentinel */ }
650 };
651 MODULE_DEVICE_TABLE(i2c, usb251xb_id);
652
653 static struct i2c_driver usb251xb_i2c_driver = {
654 .driver = {
655 .name = DRIVER_NAME,
656 .of_match_table = of_match_ptr(usb251xb_of_match),
657 },
658 .probe = usb251xb_i2c_probe,
659 .id_table = usb251xb_id,
660 };
661
662 module_i2c_driver(usb251xb_i2c_driver);
663
664 MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>");
665 MODULE_DESCRIPTION("USB251x/xBi USB 2.0 Hub Controller Driver");
666 MODULE_LICENSE("GPL");
667
