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13#include <linux/delay.h>
14#include <linux/gpio/consumer.h>
15#include <linux/gpio/driver.h>
16#include <linux/i2c.h>
17#include <linux/module.h>
18#include <linux/nls.h>
19#include <linux/of_device.h>
20#include <linux/slab.h>
21
22
23#define USB251XB_ADDR_VENDOR_ID_LSB 0x00
24#define USB251XB_ADDR_VENDOR_ID_MSB 0x01
25#define USB251XB_DEF_VENDOR_ID 0x0424
26
27#define USB251XB_ADDR_PRODUCT_ID_LSB 0x02
28#define USB251XB_ADDR_PRODUCT_ID_MSB 0x03
29#define USB251XB_DEF_PRODUCT_ID_12 0x2512
30#define USB251XB_DEF_PRODUCT_ID_13 0x2513
31#define USB251XB_DEF_PRODUCT_ID_14 0x2514
32#define USB251XB_DEF_PRODUCT_ID_17 0x2517
33
34#define USB251XB_ADDR_DEVICE_ID_LSB 0x04
35#define USB251XB_ADDR_DEVICE_ID_MSB 0x05
36#define USB251XB_DEF_DEVICE_ID 0x0BB3
37
38#define USB251XB_ADDR_CONFIG_DATA_1 0x06
39#define USB251XB_DEF_CONFIG_DATA_1 0x9B
40#define USB251XB_ADDR_CONFIG_DATA_2 0x07
41#define USB251XB_DEF_CONFIG_DATA_2 0x20
42#define USB251XB_ADDR_CONFIG_DATA_3 0x08
43#define USB251XB_DEF_CONFIG_DATA_3 0x02
44
45#define USB251XB_ADDR_NON_REMOVABLE_DEVICES 0x09
46#define USB251XB_DEF_NON_REMOVABLE_DEVICES 0x00
47
48#define USB251XB_ADDR_PORT_DISABLE_SELF 0x0A
49#define USB251XB_DEF_PORT_DISABLE_SELF 0x00
50#define USB251XB_ADDR_PORT_DISABLE_BUS 0x0B
51#define USB251XB_DEF_PORT_DISABLE_BUS 0x00
52
53#define USB251XB_ADDR_MAX_POWER_SELF 0x0C
54#define USB251XB_DEF_MAX_POWER_SELF 0x01
55#define USB251XB_ADDR_MAX_POWER_BUS 0x0D
56#define USB251XB_DEF_MAX_POWER_BUS 0x32
57
58#define USB251XB_ADDR_MAX_CURRENT_SELF 0x0E
59#define USB251XB_DEF_MAX_CURRENT_SELF 0x01
60#define USB251XB_ADDR_MAX_CURRENT_BUS 0x0F
61#define USB251XB_DEF_MAX_CURRENT_BUS 0x32
62
63#define USB251XB_ADDR_POWER_ON_TIME 0x10
64#define USB251XB_DEF_POWER_ON_TIME 0x32
65
66#define USB251XB_ADDR_LANGUAGE_ID_HIGH 0x11
67#define USB251XB_ADDR_LANGUAGE_ID_LOW 0x12
68#define USB251XB_DEF_LANGUAGE_ID 0x0000
69
70#define USB251XB_STRING_BUFSIZE 62
71#define USB251XB_ADDR_MANUFACTURER_STRING_LEN 0x13
72#define USB251XB_ADDR_MANUFACTURER_STRING 0x16
73#define USB251XB_DEF_MANUFACTURER_STRING "Microchip"
74
75#define USB251XB_ADDR_PRODUCT_STRING_LEN 0x14
76#define USB251XB_ADDR_PRODUCT_STRING 0x54
77#define USB251XB_DEF_PRODUCT_STRING "USB251xB/xBi/7i"
78
79#define USB251XB_ADDR_SERIAL_STRING_LEN 0x15
80#define USB251XB_ADDR_SERIAL_STRING 0x92
81#define USB251XB_DEF_SERIAL_STRING ""
82
83#define USB251XB_ADDR_BATTERY_CHARGING_ENABLE 0xD0
84#define USB251XB_DEF_BATTERY_CHARGING_ENABLE 0x00
85
86#define USB251XB_ADDR_BOOST_UP 0xF6
87#define USB251XB_DEF_BOOST_UP 0x00
88#define USB251XB_ADDR_BOOST_57 0xF7
89#define USB251XB_DEF_BOOST_57 0x00
90#define USB251XB_ADDR_BOOST_14 0xF8
91#define USB251XB_DEF_BOOST_14 0x00
92
93#define USB251XB_ADDR_PORT_SWAP 0xFA
94#define USB251XB_DEF_PORT_SWAP 0x00
95
96#define USB251XB_ADDR_PORT_MAP_12 0xFB
97#define USB251XB_DEF_PORT_MAP_12 0x00
98#define USB251XB_ADDR_PORT_MAP_34 0xFC
99#define USB251XB_DEF_PORT_MAP_34 0x00
100#define USB251XB_ADDR_PORT_MAP_56 0xFD
101#define USB251XB_DEF_PORT_MAP_56 0x00
102#define USB251XB_ADDR_PORT_MAP_7 0xFE
103#define USB251XB_DEF_PORT_MAP_7 0x00
104
105#define USB251XB_ADDR_STATUS_COMMAND 0xFF
106#define USB251XB_STATUS_COMMAND_SMBUS_DOWN 0x04
107#define USB251XB_STATUS_COMMAND_RESET 0x02
108#define USB251XB_STATUS_COMMAND_ATTACH 0x01
109
110#define USB251XB_I2C_REG_SZ 0x100
111#define USB251XB_I2C_WRITE_SZ 0x10
112
113#define DRIVER_NAME "usb251xb"
114#define DRIVER_DESC "Microchip USB 2.0 Hi-Speed Hub Controller"
115
116struct usb251xb {
117 struct device *dev;
118 struct i2c_client *i2c;
119 u8 skip_config;
120 struct gpio_desc *gpio_reset;
121 u16 vendor_id;
122 u16 product_id;
123 u16 device_id;
124 u8 conf_data1;
125 u8 conf_data2;
126 u8 conf_data3;
127 u8 non_rem_dev;
128 u8 port_disable_sp;
129 u8 port_disable_bp;
130 u8 max_power_sp;
131 u8 max_power_bp;
132 u8 max_current_sp;
133 u8 max_current_bp;
134 u8 power_on_time;
135 u16 lang_id;
136 u8 manufacturer_len;
137 u8 product_len;
138 u8 serial_len;
139 char manufacturer[USB251XB_STRING_BUFSIZE];
140 char product[USB251XB_STRING_BUFSIZE];
141 char serial[USB251XB_STRING_BUFSIZE];
142 u8 bat_charge_en;
143 u8 boost_up;
144 u8 boost_57;
145 u8 boost_14;
146 u8 port_swap;
147 u8 port_map12;
148 u8 port_map34;
149 u8 port_map56;
150 u8 port_map7;
151 u8 status;
152};
153
154struct usb251xb_data {
155 u16 product_id;
156 u8 port_cnt;
157 bool led_support;
158 bool bat_support;
159 char product_str[USB251XB_STRING_BUFSIZE / 2];
160};
161
162static const struct usb251xb_data usb2512b_data = {
163 .product_id = 0x2512,
164 .port_cnt = 2,
165 .led_support = false,
166 .bat_support = true,
167 .product_str = "USB2512B",
168};
169
170static const struct usb251xb_data usb2512bi_data = {
171 .product_id = 0x2512,
172 .port_cnt = 2,
173 .led_support = false,
174 .bat_support = true,
175 .product_str = "USB2512Bi",
176};
177
178static const struct usb251xb_data usb2513b_data = {
179 .product_id = 0x2513,
180 .port_cnt = 3,
181 .led_support = false,
182 .bat_support = true,
183 .product_str = "USB2513B",
184};
185
186static const struct usb251xb_data usb2513bi_data = {
187 .product_id = 0x2513,
188 .port_cnt = 3,
189 .led_support = false,
190 .bat_support = true,
191 .product_str = "USB2513Bi",
192};
193
194static const struct usb251xb_data usb2514b_data = {
195 .product_id = 0x2514,
196 .port_cnt = 4,
197 .led_support = false,
198 .bat_support = true,
199 .product_str = "USB2514B",
200};
201
202static const struct usb251xb_data usb2514bi_data = {
203 .product_id = 0x2514,
204 .port_cnt = 4,
205 .led_support = false,
206 .bat_support = true,
207 .product_str = "USB2514Bi",
208};
209
210static const struct usb251xb_data usb2517_data = {
211 .product_id = 0x2517,
212 .port_cnt = 7,
213 .led_support = true,
214 .bat_support = false,
215 .product_str = "USB2517",
216};
217
218static const struct usb251xb_data usb2517i_data = {
219 .product_id = 0x2517,
220 .port_cnt = 7,
221 .led_support = true,
222 .bat_support = false,
223 .product_str = "USB2517i",
224};
225
226#ifdef CONFIG_GPIOLIB
227static int usb251xb_check_dev_children(struct device *dev, void *child)
228{
229 if (dev->type == &i2c_adapter_type) {
230 return device_for_each_child(dev, child,
231 usb251xb_check_dev_children);
232 }
233
234 return (dev == child);
235}
236
237static int usb251x_check_gpio_chip(struct usb251xb *hub)
238{
239 struct gpio_chip *gc = gpiod_to_chip(hub->gpio_reset);
240 struct i2c_adapter *adap = hub->i2c->adapter;
241 int ret;
242
243 if (!hub->gpio_reset)
244 return 0;
245
246 if (!gc)
247 return -EINVAL;
248
249 ret = usb251xb_check_dev_children(&adap->dev, gc->parent);
250 if (ret) {
251 dev_err(hub->dev, "Reset GPIO chip is at the same i2c-bus\n");
252 return -EINVAL;
253 }
254
255 return 0;
256}
257#else
258static int usb251x_check_gpio_chip(struct usb251xb *hub)
259{
260 return 0;
261}
262#endif
263
264static void usb251xb_reset(struct usb251xb *hub, int state)
265{
266 if (!hub->gpio_reset)
267 return;
268
269 i2c_lock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT);
270
271 gpiod_set_value_cansleep(hub->gpio_reset, state);
272
273
274 if (!state)
275 usleep_range(500, 750);
276 else
277 usleep_range(1, 10);
278
279 i2c_unlock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT);
280}
281
282static int usb251xb_connect(struct usb251xb *hub)
283{
284 struct device *dev = hub->dev;
285 int err, i;
286 char i2c_wb[USB251XB_I2C_REG_SZ];
287
288 memset(i2c_wb, 0, USB251XB_I2C_REG_SZ);
289
290 if (hub->skip_config) {
291 dev_info(dev, "Skip hub configuration, only attach.\n");
292 i2c_wb[0] = 0x01;
293 i2c_wb[1] = USB251XB_STATUS_COMMAND_ATTACH;
294
295 usb251xb_reset(hub, 0);
296
297 err = i2c_smbus_write_i2c_block_data(hub->i2c,
298 USB251XB_ADDR_STATUS_COMMAND, 2, i2c_wb);
299 if (err) {
300 dev_err(dev, "attaching hub failed: %d\n", err);
301 return err;
302 }
303 return 0;
304 }
305
306 i2c_wb[USB251XB_ADDR_VENDOR_ID_MSB] = (hub->vendor_id >> 8) & 0xFF;
307 i2c_wb[USB251XB_ADDR_VENDOR_ID_LSB] = hub->vendor_id & 0xFF;
308 i2c_wb[USB251XB_ADDR_PRODUCT_ID_MSB] = (hub->product_id >> 8) & 0xFF;
309 i2c_wb[USB251XB_ADDR_PRODUCT_ID_LSB] = hub->product_id & 0xFF;
310 i2c_wb[USB251XB_ADDR_DEVICE_ID_MSB] = (hub->device_id >> 8) & 0xFF;
311 i2c_wb[USB251XB_ADDR_DEVICE_ID_LSB] = hub->device_id & 0xFF;
312 i2c_wb[USB251XB_ADDR_CONFIG_DATA_1] = hub->conf_data1;
313 i2c_wb[USB251XB_ADDR_CONFIG_DATA_2] = hub->conf_data2;
314 i2c_wb[USB251XB_ADDR_CONFIG_DATA_3] = hub->conf_data3;
315 i2c_wb[USB251XB_ADDR_NON_REMOVABLE_DEVICES] = hub->non_rem_dev;
316 i2c_wb[USB251XB_ADDR_PORT_DISABLE_SELF] = hub->port_disable_sp;
317 i2c_wb[USB251XB_ADDR_PORT_DISABLE_BUS] = hub->port_disable_bp;
318 i2c_wb[USB251XB_ADDR_MAX_POWER_SELF] = hub->max_power_sp;
319 i2c_wb[USB251XB_ADDR_MAX_POWER_BUS] = hub->max_power_bp;
320 i2c_wb[USB251XB_ADDR_MAX_CURRENT_SELF] = hub->max_current_sp;
321 i2c_wb[USB251XB_ADDR_MAX_CURRENT_BUS] = hub->max_current_bp;
322 i2c_wb[USB251XB_ADDR_POWER_ON_TIME] = hub->power_on_time;
323 i2c_wb[USB251XB_ADDR_LANGUAGE_ID_HIGH] = (hub->lang_id >> 8) & 0xFF;
324 i2c_wb[USB251XB_ADDR_LANGUAGE_ID_LOW] = hub->lang_id & 0xFF;
325 i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING_LEN] = hub->manufacturer_len;
326 i2c_wb[USB251XB_ADDR_PRODUCT_STRING_LEN] = hub->product_len;
327 i2c_wb[USB251XB_ADDR_SERIAL_STRING_LEN] = hub->serial_len;
328 memcpy(&i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING], hub->manufacturer,
329 USB251XB_STRING_BUFSIZE);
330 memcpy(&i2c_wb[USB251XB_ADDR_SERIAL_STRING], hub->serial,
331 USB251XB_STRING_BUFSIZE);
332 memcpy(&i2c_wb[USB251XB_ADDR_PRODUCT_STRING], hub->product,
333 USB251XB_STRING_BUFSIZE);
334 i2c_wb[USB251XB_ADDR_BATTERY_CHARGING_ENABLE] = hub->bat_charge_en;
335 i2c_wb[USB251XB_ADDR_BOOST_UP] = hub->boost_up;
336 i2c_wb[USB251XB_ADDR_BOOST_57] = hub->boost_57;
337 i2c_wb[USB251XB_ADDR_BOOST_14] = hub->boost_14;
338 i2c_wb[USB251XB_ADDR_PORT_SWAP] = hub->port_swap;
339 i2c_wb[USB251XB_ADDR_PORT_MAP_12] = hub->port_map12;
340 i2c_wb[USB251XB_ADDR_PORT_MAP_34] = hub->port_map34;
341 i2c_wb[USB251XB_ADDR_PORT_MAP_56] = hub->port_map56;
342 i2c_wb[USB251XB_ADDR_PORT_MAP_7] = hub->port_map7;
343 i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH;
344
345 usb251xb_reset(hub, 0);
346
347
348 for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) {
349 int offset = i * USB251XB_I2C_WRITE_SZ;
350 char wbuf[USB251XB_I2C_WRITE_SZ + 1];
351
352
353
354
355 wbuf[0] = USB251XB_I2C_WRITE_SZ;
356 memcpy(&wbuf[1], &i2c_wb[offset], USB251XB_I2C_WRITE_SZ);
357
358 dev_dbg(dev, "writing %d byte block %d to 0x%02X\n",
359 USB251XB_I2C_WRITE_SZ, i, offset);
360
361 err = i2c_smbus_write_i2c_block_data(hub->i2c, offset,
362 USB251XB_I2C_WRITE_SZ + 1,
363 wbuf);
364 if (err)
365 goto out_err;
366 }
367
368 dev_info(dev, "Hub configuration was successful.\n");
369 return 0;
370
371out_err:
372 dev_err(dev, "configuring block %d failed: %d\n", i, err);
373 return err;
374}
375
376#ifdef CONFIG_OF
377static void usb251xb_get_ports_field(struct usb251xb *hub,
378 const char *prop_name, u8 port_cnt,
379 bool ds_only, u8 *fld)
380{
381 struct device *dev = hub->dev;
382 struct property *prop;
383 const __be32 *p;
384 u32 port;
385
386 of_property_for_each_u32(dev->of_node, prop_name, prop, p, port) {
387 if ((port >= ds_only ? 1 : 0) && (port <= port_cnt))
388 *fld |= BIT(port);
389 else
390 dev_warn(dev, "port %u doesn't exist\n", port);
391 }
392}
393
394static int usb251xb_get_ofdata(struct usb251xb *hub,
395 struct usb251xb_data *data)
396{
397 struct device *dev = hub->dev;
398 struct device_node *np = dev->of_node;
399 int len, err;
400 u32 property_u32 = 0;
401 const char *cproperty_char;
402 char str[USB251XB_STRING_BUFSIZE / 2];
403
404 if (!np) {
405 dev_err(dev, "failed to get ofdata\n");
406 return -ENODEV;
407 }
408
409 if (of_get_property(np, "skip-config", NULL))
410 hub->skip_config = 1;
411 else
412 hub->skip_config = 0;
413
414 hub->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
415 if (PTR_ERR(hub->gpio_reset) == -EPROBE_DEFER) {
416 return -EPROBE_DEFER;
417 } else if (IS_ERR(hub->gpio_reset)) {
418 err = PTR_ERR(hub->gpio_reset);
419 dev_err(dev, "unable to request GPIO reset pin (%d)\n", err);
420 return err;
421 }
422
423 if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1))
424 hub->vendor_id = USB251XB_DEF_VENDOR_ID;
425
426 if (of_property_read_u16_array(np, "product-id",
427 &hub->product_id, 1))
428 hub->product_id = data->product_id;
429
430 if (of_property_read_u16_array(np, "device-id", &hub->device_id, 1))
431 hub->device_id = USB251XB_DEF_DEVICE_ID;
432
433 hub->conf_data1 = USB251XB_DEF_CONFIG_DATA_1;
434 if (of_get_property(np, "self-powered", NULL)) {
435 hub->conf_data1 |= BIT(7);
436
437
438 hub->conf_data1 &= ~BIT(2);
439 if (of_get_property(np, "ganged-sensing", NULL))
440 hub->conf_data1 &= ~BIT(1);
441 else if (of_get_property(np, "individual-sensing", NULL))
442 hub->conf_data1 |= BIT(1);
443 } else if (of_get_property(np, "bus-powered", NULL)) {
444 hub->conf_data1 &= ~BIT(7);
445
446
447 hub->conf_data1 |= BIT(2);
448 }
449
450 if (of_get_property(np, "disable-hi-speed", NULL))
451 hub->conf_data1 |= BIT(5);
452
453 if (of_get_property(np, "multi-tt", NULL))
454 hub->conf_data1 |= BIT(4);
455 else if (of_get_property(np, "single-tt", NULL))
456 hub->conf_data1 &= ~BIT(4);
457
458 if (of_get_property(np, "disable-eop", NULL))
459 hub->conf_data1 |= BIT(3);
460
461 if (of_get_property(np, "individual-port-switching", NULL))
462 hub->conf_data1 |= BIT(0);
463 else if (of_get_property(np, "ganged-port-switching", NULL))
464 hub->conf_data1 &= ~BIT(0);
465
466 hub->conf_data2 = USB251XB_DEF_CONFIG_DATA_2;
467 if (of_get_property(np, "dynamic-power-switching", NULL))
468 hub->conf_data2 |= BIT(7);
469
470 if (!of_property_read_u32(np, "oc-delay-us", &property_u32)) {
471 if (property_u32 == 100) {
472
473 hub->conf_data2 &= ~BIT(5);
474 hub->conf_data2 &= ~BIT(4);
475 } else if (property_u32 == 4000) {
476
477 hub->conf_data2 &= ~BIT(5);
478 hub->conf_data2 |= BIT(4);
479 } else if (property_u32 == 16000) {
480
481 hub->conf_data2 |= BIT(5);
482 hub->conf_data2 |= BIT(4);
483 } else {
484
485 hub->conf_data2 |= BIT(5);
486 hub->conf_data2 &= ~BIT(4);
487 }
488 }
489
490 if (of_get_property(np, "compound-device", NULL))
491 hub->conf_data2 |= BIT(3);
492
493 hub->conf_data3 = USB251XB_DEF_CONFIG_DATA_3;
494 if (of_get_property(np, "port-mapping-mode", NULL))
495 hub->conf_data3 |= BIT(3);
496
497 if (data->led_support && of_get_property(np, "led-usb-mode", NULL))
498 hub->conf_data3 &= ~BIT(1);
499
500 if (of_get_property(np, "string-support", NULL))
501 hub->conf_data3 |= BIT(0);
502
503 hub->non_rem_dev = USB251XB_DEF_NON_REMOVABLE_DEVICES;
504 usb251xb_get_ports_field(hub, "non-removable-ports", data->port_cnt,
505 true, &hub->non_rem_dev);
506
507 hub->port_disable_sp = USB251XB_DEF_PORT_DISABLE_SELF;
508 usb251xb_get_ports_field(hub, "sp-disabled-ports", data->port_cnt,
509 true, &hub->port_disable_sp);
510
511 hub->port_disable_bp = USB251XB_DEF_PORT_DISABLE_BUS;
512 usb251xb_get_ports_field(hub, "bp-disabled-ports", data->port_cnt,
513 true, &hub->port_disable_bp);
514
515 hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
516 if (!of_property_read_u32(np, "sp-max-total-current-microamp",
517 &property_u32))
518 hub->max_power_sp = min_t(u8, property_u32 / 2000, 50);
519
520 hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS;
521 if (!of_property_read_u32(np, "bp-max-total-current-microamp",
522 &property_u32))
523 hub->max_power_bp = min_t(u8, property_u32 / 2000, 255);
524
525 hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF;
526 if (!of_property_read_u32(np, "sp-max-removable-current-microamp",
527 &property_u32))
528 hub->max_current_sp = min_t(u8, property_u32 / 2000, 50);
529
530 hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS;
531 if (!of_property_read_u32(np, "bp-max-removable-current-microamp",
532 &property_u32))
533 hub->max_current_bp = min_t(u8, property_u32 / 2000, 255);
534
535 hub->power_on_time = USB251XB_DEF_POWER_ON_TIME;
536 if (!of_property_read_u32(np, "power-on-time-ms", &property_u32))
537 hub->power_on_time = min_t(u8, property_u32 / 2, 255);
538
539 if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1))
540 hub->lang_id = USB251XB_DEF_LANGUAGE_ID;
541
542 cproperty_char = of_get_property(np, "manufacturer", NULL);
543 strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING,
544 sizeof(str));
545 hub->manufacturer_len = strlen(str) & 0xFF;
546 memset(hub->manufacturer, 0, USB251XB_STRING_BUFSIZE);
547 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
548 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
549 (wchar_t *)hub->manufacturer,
550 USB251XB_STRING_BUFSIZE);
551
552 cproperty_char = of_get_property(np, "product", NULL);
553 strlcpy(str, cproperty_char ? : data->product_str, sizeof(str));
554 hub->product_len = strlen(str) & 0xFF;
555 memset(hub->product, 0, USB251XB_STRING_BUFSIZE);
556 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
557 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
558 (wchar_t *)hub->product,
559 USB251XB_STRING_BUFSIZE);
560
561 cproperty_char = of_get_property(np, "serial", NULL);
562 strlcpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING,
563 sizeof(str));
564 hub->serial_len = strlen(str) & 0xFF;
565 memset(hub->serial, 0, USB251XB_STRING_BUFSIZE);
566 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
567 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
568 (wchar_t *)hub->serial,
569 USB251XB_STRING_BUFSIZE);
570
571
572
573
574
575 hub->port_swap = USB251XB_DEF_PORT_SWAP;
576 usb251xb_get_ports_field(hub, "swap-dx-lanes", data->port_cnt,
577 false, &hub->port_swap);
578
579
580
581
582 hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE;
583 hub->boost_up = USB251XB_DEF_BOOST_UP;
584 hub->boost_57 = USB251XB_DEF_BOOST_57;
585 hub->boost_14 = USB251XB_DEF_BOOST_14;
586 hub->port_map12 = USB251XB_DEF_PORT_MAP_12;
587 hub->port_map34 = USB251XB_DEF_PORT_MAP_34;
588 hub->port_map56 = USB251XB_DEF_PORT_MAP_56;
589 hub->port_map7 = USB251XB_DEF_PORT_MAP_7;
590
591 return 0;
592}
593
594static const struct of_device_id usb251xb_of_match[] = {
595 {
596 .compatible = "microchip,usb2512b",
597 .data = &usb2512b_data,
598 }, {
599 .compatible = "microchip,usb2512bi",
600 .data = &usb2512bi_data,
601 }, {
602 .compatible = "microchip,usb2513b",
603 .data = &usb2513b_data,
604 }, {
605 .compatible = "microchip,usb2513bi",
606 .data = &usb2513bi_data,
607 }, {
608 .compatible = "microchip,usb2514b",
609 .data = &usb2514b_data,
610 }, {
611 .compatible = "microchip,usb2514bi",
612 .data = &usb2514bi_data,
613 }, {
614 .compatible = "microchip,usb2517",
615 .data = &usb2517_data,
616 }, {
617 .compatible = "microchip,usb2517i",
618 .data = &usb2517i_data,
619 }, {
620
621 }
622};
623MODULE_DEVICE_TABLE(of, usb251xb_of_match);
624#else
625static int usb251xb_get_ofdata(struct usb251xb *hub,
626 struct usb251xb_data *data)
627{
628 return 0;
629}
630#endif
631
632static int usb251xb_probe(struct usb251xb *hub)
633{
634 struct device *dev = hub->dev;
635 struct device_node *np = dev->of_node;
636 const struct of_device_id *of_id = of_match_device(usb251xb_of_match,
637 dev);
638 int err;
639
640 if (np && of_id) {
641 err = usb251xb_get_ofdata(hub,
642 (struct usb251xb_data *)of_id->data);
643 if (err) {
644 dev_err(dev, "failed to get ofdata: %d\n", err);
645 return err;
646 }
647 }
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664 err = usb251x_check_gpio_chip(hub);
665 if (err)
666 return err;
667
668 err = usb251xb_connect(hub);
669 if (err) {
670 dev_err(dev, "Failed to connect hub (%d)\n", err);
671 return err;
672 }
673
674 dev_info(dev, "Hub probed successfully\n");
675
676 return 0;
677}
678
679static int usb251xb_i2c_probe(struct i2c_client *i2c,
680 const struct i2c_device_id *id)
681{
682 struct usb251xb *hub;
683
684 hub = devm_kzalloc(&i2c->dev, sizeof(struct usb251xb), GFP_KERNEL);
685 if (!hub)
686 return -ENOMEM;
687
688 i2c_set_clientdata(i2c, hub);
689 hub->dev = &i2c->dev;
690 hub->i2c = i2c;
691
692 return usb251xb_probe(hub);
693}
694
695static const struct i2c_device_id usb251xb_id[] = {
696 { "usb2512b", 0 },
697 { "usb2512bi", 0 },
698 { "usb2513b", 0 },
699 { "usb2513bi", 0 },
700 { "usb2514b", 0 },
701 { "usb2514bi", 0 },
702 { "usb2517", 0 },
703 { "usb2517i", 0 },
704 { }
705};
706MODULE_DEVICE_TABLE(i2c, usb251xb_id);
707
708static struct i2c_driver usb251xb_i2c_driver = {
709 .driver = {
710 .name = DRIVER_NAME,
711 .of_match_table = of_match_ptr(usb251xb_of_match),
712 },
713 .probe = usb251xb_i2c_probe,
714 .id_table = usb251xb_id,
715};
716
717module_i2c_driver(usb251xb_i2c_driver);
718
719MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>");
720MODULE_DESCRIPTION("USB251x/xBi USB 2.0 Hub Controller Driver");
721MODULE_LICENSE("GPL");
722
