1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * USB SD Host Controller (USHC) controller driver. |
4 | * |
5 | * Copyright (C) 2010 Cambridge Silicon Radio Ltd. |
6 | * |
7 | * Notes: |
8 | * - Only version 2 devices are supported. |
9 | * - Version 2 devices only support SDIO cards/devices (R2 response is |
10 | * unsupported). |
11 | * |
12 | * References: |
13 | * [USHC] USB SD Host Controller specification (CS-118793-SP) |
14 | */ |
15 | #include <linux/module.h> |
16 | #include <linux/usb.h> |
17 | #include <linux/kernel.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/dma-mapping.h> |
20 | #include <linux/mmc/host.h> |
21 | |
22 | enum ushc_request { |
23 | USHC_GET_CAPS = 0x00, |
24 | USHC_HOST_CTRL = 0x01, |
25 | USHC_PWR_CTRL = 0x02, |
26 | USHC_CLK_FREQ = 0x03, |
27 | USHC_EXEC_CMD = 0x04, |
28 | USHC_READ_RESP = 0x05, |
29 | USHC_RESET = 0x06, |
30 | }; |
31 | |
32 | enum ushc_request_type { |
33 | USHC_GET_CAPS_TYPE = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
34 | USHC_HOST_CTRL_TYPE = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
35 | USHC_PWR_CTRL_TYPE = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
36 | USHC_CLK_FREQ_TYPE = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
37 | USHC_EXEC_CMD_TYPE = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
38 | USHC_READ_RESP_TYPE = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
39 | USHC_RESET_TYPE = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
40 | }; |
41 | |
42 | #define USHC_GET_CAPS_VERSION_MASK 0xff |
43 | #define USHC_GET_CAPS_3V3 (1 << 8) |
44 | #define USHC_GET_CAPS_3V0 (1 << 9) |
45 | #define USHC_GET_CAPS_1V8 (1 << 10) |
46 | #define USHC_GET_CAPS_HIGH_SPD (1 << 16) |
47 | |
48 | #define USHC_HOST_CTRL_4BIT (1 << 1) |
49 | #define USHC_HOST_CTRL_HIGH_SPD (1 << 0) |
50 | |
51 | #define USHC_PWR_CTRL_OFF 0x00 |
52 | #define USHC_PWR_CTRL_3V3 0x01 |
53 | #define USHC_PWR_CTRL_3V0 0x02 |
54 | #define USHC_PWR_CTRL_1V8 0x03 |
55 | |
56 | #define USHC_READ_RESP_BUSY (1 << 4) |
57 | #define USHC_READ_RESP_ERR_TIMEOUT (1 << 3) |
58 | #define USHC_READ_RESP_ERR_CRC (1 << 2) |
59 | #define USHC_READ_RESP_ERR_DAT (1 << 1) |
60 | #define USHC_READ_RESP_ERR_CMD (1 << 0) |
61 | #define USHC_READ_RESP_ERR_MASK 0x0f |
62 | |
63 | struct ushc_cbw { |
64 | __u8 signature; |
65 | __u8 cmd_idx; |
66 | __le16 block_size; |
67 | __le32 arg; |
68 | } __attribute__((packed)); |
69 | |
70 | #define USHC_CBW_SIGNATURE 'C' |
71 | |
72 | struct ushc_csw { |
73 | __u8 signature; |
74 | __u8 status; |
75 | __le32 response; |
76 | } __attribute__((packed)); |
77 | |
78 | #define USHC_CSW_SIGNATURE 'S' |
79 | |
80 | struct ushc_int_data { |
81 | u8 status; |
82 | u8 reserved[3]; |
83 | }; |
84 | |
85 | #define USHC_INT_STATUS_SDIO_INT (1 << 1) |
86 | #define USHC_INT_STATUS_CARD_PRESENT (1 << 0) |
87 | |
88 | |
89 | struct ushc_data { |
90 | struct usb_device *usb_dev; |
91 | struct mmc_host *mmc; |
92 | |
93 | struct urb *int_urb; |
94 | struct ushc_int_data *int_data; |
95 | |
96 | struct urb *cbw_urb; |
97 | struct ushc_cbw *cbw; |
98 | |
99 | struct urb *data_urb; |
100 | |
101 | struct urb *csw_urb; |
102 | struct ushc_csw *csw; |
103 | |
104 | spinlock_t lock; |
105 | struct mmc_request *current_req; |
106 | u32 caps; |
107 | u16 host_ctrl; |
108 | unsigned long flags; |
109 | u8 last_status; |
110 | int clock_freq; |
111 | }; |
112 | |
113 | #define DISCONNECTED 0 |
114 | #define INT_EN 1 |
115 | #define IGNORE_NEXT_INT 2 |
116 | |
117 | static void data_callback(struct urb *urb); |
118 | |
119 | static int ushc_hw_reset(struct ushc_data *ushc) |
120 | { |
121 | return usb_control_msg(dev: ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0), |
122 | request: USHC_RESET, requesttype: USHC_RESET_TYPE, |
123 | value: 0, index: 0, NULL, size: 0, timeout: 100); |
124 | } |
125 | |
126 | static int ushc_hw_get_caps(struct ushc_data *ushc) |
127 | { |
128 | int ret; |
129 | int version; |
130 | |
131 | ret = usb_control_msg(dev: ushc->usb_dev, usb_rcvctrlpipe(ushc->usb_dev, 0), |
132 | request: USHC_GET_CAPS, requesttype: USHC_GET_CAPS_TYPE, |
133 | value: 0, index: 0, data: &ushc->caps, size: sizeof(ushc->caps), timeout: 100); |
134 | if (ret < 0) |
135 | return ret; |
136 | |
137 | ushc->caps = le32_to_cpu(ushc->caps); |
138 | |
139 | version = ushc->caps & USHC_GET_CAPS_VERSION_MASK; |
140 | if (version != 0x02) { |
141 | dev_err(&ushc->usb_dev->dev, "controller version %d is not supported\n" , version); |
142 | return -EINVAL; |
143 | } |
144 | |
145 | return 0; |
146 | } |
147 | |
148 | static int ushc_hw_set_host_ctrl(struct ushc_data *ushc, u16 mask, u16 val) |
149 | { |
150 | u16 host_ctrl; |
151 | int ret; |
152 | |
153 | host_ctrl = (ushc->host_ctrl & ~mask) | val; |
154 | ret = usb_control_msg(dev: ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0), |
155 | request: USHC_HOST_CTRL, requesttype: USHC_HOST_CTRL_TYPE, |
156 | value: host_ctrl, index: 0, NULL, size: 0, timeout: 100); |
157 | if (ret < 0) |
158 | return ret; |
159 | ushc->host_ctrl = host_ctrl; |
160 | return 0; |
161 | } |
162 | |
163 | static void int_callback(struct urb *urb) |
164 | { |
165 | struct ushc_data *ushc = urb->context; |
166 | u8 status, last_status; |
167 | |
168 | if (urb->status < 0) |
169 | return; |
170 | |
171 | status = ushc->int_data->status; |
172 | last_status = ushc->last_status; |
173 | ushc->last_status = status; |
174 | |
175 | /* |
176 | * Ignore the card interrupt status on interrupt transfers that |
177 | * were submitted while card interrupts where disabled. |
178 | * |
179 | * This avoid occasional spurious interrupts when enabling |
180 | * interrupts immediately after clearing the source on the card. |
181 | */ |
182 | |
183 | if (!test_and_clear_bit(IGNORE_NEXT_INT, addr: &ushc->flags) |
184 | && test_bit(INT_EN, &ushc->flags) |
185 | && status & USHC_INT_STATUS_SDIO_INT) { |
186 | mmc_signal_sdio_irq(host: ushc->mmc); |
187 | } |
188 | |
189 | if ((status ^ last_status) & USHC_INT_STATUS_CARD_PRESENT) |
190 | mmc_detect_change(ushc->mmc, delay: msecs_to_jiffies(m: 100)); |
191 | |
192 | if (!test_bit(INT_EN, &ushc->flags)) |
193 | set_bit(IGNORE_NEXT_INT, addr: &ushc->flags); |
194 | usb_submit_urb(urb: ushc->int_urb, GFP_ATOMIC); |
195 | } |
196 | |
197 | static void cbw_callback(struct urb *urb) |
198 | { |
199 | struct ushc_data *ushc = urb->context; |
200 | |
201 | if (urb->status != 0) { |
202 | usb_unlink_urb(urb: ushc->data_urb); |
203 | usb_unlink_urb(urb: ushc->csw_urb); |
204 | } |
205 | } |
206 | |
207 | static void data_callback(struct urb *urb) |
208 | { |
209 | struct ushc_data *ushc = urb->context; |
210 | |
211 | if (urb->status != 0) |
212 | usb_unlink_urb(urb: ushc->csw_urb); |
213 | } |
214 | |
215 | static void csw_callback(struct urb *urb) |
216 | { |
217 | struct ushc_data *ushc = urb->context; |
218 | struct mmc_request *req = ushc->current_req; |
219 | int status; |
220 | |
221 | status = ushc->csw->status; |
222 | |
223 | if (urb->status != 0) { |
224 | req->cmd->error = urb->status; |
225 | } else if (status & USHC_READ_RESP_ERR_CMD) { |
226 | if (status & USHC_READ_RESP_ERR_CRC) |
227 | req->cmd->error = -EIO; |
228 | else |
229 | req->cmd->error = -ETIMEDOUT; |
230 | } |
231 | if (req->data) { |
232 | if (status & USHC_READ_RESP_ERR_DAT) { |
233 | if (status & USHC_READ_RESP_ERR_CRC) |
234 | req->data->error = -EIO; |
235 | else |
236 | req->data->error = -ETIMEDOUT; |
237 | req->data->bytes_xfered = 0; |
238 | } else { |
239 | req->data->bytes_xfered = req->data->blksz * req->data->blocks; |
240 | } |
241 | } |
242 | |
243 | req->cmd->resp[0] = le32_to_cpu(ushc->csw->response); |
244 | |
245 | mmc_request_done(ushc->mmc, req); |
246 | } |
247 | |
248 | static void ushc_request(struct mmc_host *mmc, struct mmc_request *req) |
249 | { |
250 | struct ushc_data *ushc = mmc_priv(host: mmc); |
251 | int ret; |
252 | unsigned long flags; |
253 | |
254 | spin_lock_irqsave(&ushc->lock, flags); |
255 | |
256 | if (test_bit(DISCONNECTED, &ushc->flags)) { |
257 | ret = -ENODEV; |
258 | goto out; |
259 | } |
260 | |
261 | /* Version 2 firmware doesn't support the R2 response format. */ |
262 | if (req->cmd->flags & MMC_RSP_136) { |
263 | ret = -EINVAL; |
264 | goto out; |
265 | } |
266 | |
267 | /* The Astoria's data FIFOs don't work with clock speeds < 5MHz so |
268 | limit commands with data to 6MHz or more. */ |
269 | if (req->data && ushc->clock_freq < 6000000) { |
270 | ret = -EINVAL; |
271 | goto out; |
272 | } |
273 | |
274 | ushc->current_req = req; |
275 | |
276 | /* Start cmd with CBW. */ |
277 | ushc->cbw->cmd_idx = cpu_to_le16(req->cmd->opcode); |
278 | if (req->data) |
279 | ushc->cbw->block_size = cpu_to_le16(req->data->blksz); |
280 | else |
281 | ushc->cbw->block_size = 0; |
282 | ushc->cbw->arg = cpu_to_le32(req->cmd->arg); |
283 | |
284 | ret = usb_submit_urb(urb: ushc->cbw_urb, GFP_ATOMIC); |
285 | if (ret < 0) |
286 | goto out; |
287 | |
288 | /* Submit data (if any). */ |
289 | if (req->data) { |
290 | struct mmc_data *data = req->data; |
291 | int pipe; |
292 | |
293 | if (data->flags & MMC_DATA_READ) |
294 | pipe = usb_rcvbulkpipe(ushc->usb_dev, 6); |
295 | else |
296 | pipe = usb_sndbulkpipe(ushc->usb_dev, 2); |
297 | |
298 | usb_fill_bulk_urb(urb: ushc->data_urb, dev: ushc->usb_dev, pipe, |
299 | NULL, buffer_length: data->sg->length, |
300 | complete_fn: data_callback, context: ushc); |
301 | ushc->data_urb->num_sgs = 1; |
302 | ushc->data_urb->sg = data->sg; |
303 | ret = usb_submit_urb(urb: ushc->data_urb, GFP_ATOMIC); |
304 | if (ret < 0) |
305 | goto out; |
306 | } |
307 | |
308 | /* Submit CSW. */ |
309 | ret = usb_submit_urb(urb: ushc->csw_urb, GFP_ATOMIC); |
310 | |
311 | out: |
312 | spin_unlock_irqrestore(lock: &ushc->lock, flags); |
313 | if (ret < 0) { |
314 | usb_unlink_urb(urb: ushc->cbw_urb); |
315 | usb_unlink_urb(urb: ushc->data_urb); |
316 | req->cmd->error = ret; |
317 | mmc_request_done(mmc, req); |
318 | } |
319 | } |
320 | |
321 | static int ushc_set_power(struct ushc_data *ushc, unsigned char power_mode) |
322 | { |
323 | u16 voltage; |
324 | |
325 | switch (power_mode) { |
326 | case MMC_POWER_OFF: |
327 | voltage = USHC_PWR_CTRL_OFF; |
328 | break; |
329 | case MMC_POWER_UP: |
330 | case MMC_POWER_ON: |
331 | voltage = USHC_PWR_CTRL_3V3; |
332 | break; |
333 | default: |
334 | return -EINVAL; |
335 | } |
336 | |
337 | return usb_control_msg(dev: ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0), |
338 | request: USHC_PWR_CTRL, requesttype: USHC_PWR_CTRL_TYPE, |
339 | value: voltage, index: 0, NULL, size: 0, timeout: 100); |
340 | } |
341 | |
342 | static int ushc_set_bus_width(struct ushc_data *ushc, int bus_width) |
343 | { |
344 | return ushc_hw_set_host_ctrl(ushc, USHC_HOST_CTRL_4BIT, |
345 | val: bus_width == 4 ? USHC_HOST_CTRL_4BIT : 0); |
346 | } |
347 | |
348 | static int ushc_set_bus_freq(struct ushc_data *ushc, int clk, bool enable_hs) |
349 | { |
350 | int ret; |
351 | |
352 | /* Hardware can't detect interrupts while the clock is off. */ |
353 | if (clk == 0) |
354 | clk = 400000; |
355 | |
356 | ret = ushc_hw_set_host_ctrl(ushc, USHC_HOST_CTRL_HIGH_SPD, |
357 | val: enable_hs ? USHC_HOST_CTRL_HIGH_SPD : 0); |
358 | if (ret < 0) |
359 | return ret; |
360 | |
361 | ret = usb_control_msg(dev: ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0), |
362 | request: USHC_CLK_FREQ, requesttype: USHC_CLK_FREQ_TYPE, |
363 | value: clk & 0xffff, index: (clk >> 16) & 0xffff, NULL, size: 0, timeout: 100); |
364 | if (ret < 0) |
365 | return ret; |
366 | |
367 | ushc->clock_freq = clk; |
368 | return 0; |
369 | } |
370 | |
371 | static void ushc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
372 | { |
373 | struct ushc_data *ushc = mmc_priv(host: mmc); |
374 | |
375 | ushc_set_power(ushc, power_mode: ios->power_mode); |
376 | ushc_set_bus_width(ushc, bus_width: 1 << ios->bus_width); |
377 | ushc_set_bus_freq(ushc, clk: ios->clock, enable_hs: ios->timing == MMC_TIMING_SD_HS); |
378 | } |
379 | |
380 | static int ushc_get_cd(struct mmc_host *mmc) |
381 | { |
382 | struct ushc_data *ushc = mmc_priv(host: mmc); |
383 | |
384 | return !!(ushc->last_status & USHC_INT_STATUS_CARD_PRESENT); |
385 | } |
386 | |
387 | static void ushc_enable_sdio_irq(struct mmc_host *mmc, int enable) |
388 | { |
389 | struct ushc_data *ushc = mmc_priv(host: mmc); |
390 | |
391 | if (enable) |
392 | set_bit(INT_EN, addr: &ushc->flags); |
393 | else |
394 | clear_bit(INT_EN, addr: &ushc->flags); |
395 | } |
396 | |
397 | static void ushc_clean_up(struct ushc_data *ushc) |
398 | { |
399 | usb_free_urb(urb: ushc->int_urb); |
400 | usb_free_urb(urb: ushc->csw_urb); |
401 | usb_free_urb(urb: ushc->data_urb); |
402 | usb_free_urb(urb: ushc->cbw_urb); |
403 | |
404 | kfree(objp: ushc->int_data); |
405 | kfree(objp: ushc->cbw); |
406 | kfree(objp: ushc->csw); |
407 | |
408 | mmc_free_host(ushc->mmc); |
409 | } |
410 | |
411 | static const struct mmc_host_ops ushc_ops = { |
412 | .request = ushc_request, |
413 | .set_ios = ushc_set_ios, |
414 | .get_cd = ushc_get_cd, |
415 | .enable_sdio_irq = ushc_enable_sdio_irq, |
416 | }; |
417 | |
418 | static int ushc_probe(struct usb_interface *intf, const struct usb_device_id *id) |
419 | { |
420 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
421 | struct mmc_host *mmc; |
422 | struct ushc_data *ushc; |
423 | int ret; |
424 | |
425 | if (intf->cur_altsetting->desc.bNumEndpoints < 1) |
426 | return -ENODEV; |
427 | |
428 | mmc = mmc_alloc_host(extra: sizeof(struct ushc_data), &intf->dev); |
429 | if (mmc == NULL) |
430 | return -ENOMEM; |
431 | ushc = mmc_priv(host: mmc); |
432 | usb_set_intfdata(intf, data: ushc); |
433 | |
434 | ushc->usb_dev = usb_dev; |
435 | ushc->mmc = mmc; |
436 | |
437 | spin_lock_init(&ushc->lock); |
438 | |
439 | ret = ushc_hw_reset(ushc); |
440 | if (ret < 0) |
441 | goto err; |
442 | |
443 | /* Read capabilities. */ |
444 | ret = ushc_hw_get_caps(ushc); |
445 | if (ret < 0) |
446 | goto err; |
447 | |
448 | mmc->ops = &ushc_ops; |
449 | |
450 | mmc->f_min = 400000; |
451 | mmc->f_max = 50000000; |
452 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; |
453 | mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; |
454 | mmc->caps |= (ushc->caps & USHC_GET_CAPS_HIGH_SPD) ? MMC_CAP_SD_HIGHSPEED : 0; |
455 | |
456 | mmc->max_seg_size = 512*511; |
457 | mmc->max_segs = 1; |
458 | mmc->max_req_size = 512*511; |
459 | mmc->max_blk_size = 512; |
460 | mmc->max_blk_count = 511; |
461 | |
462 | ushc->int_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
463 | if (ushc->int_urb == NULL) { |
464 | ret = -ENOMEM; |
465 | goto err; |
466 | } |
467 | ushc->int_data = kzalloc(size: sizeof(struct ushc_int_data), GFP_KERNEL); |
468 | if (ushc->int_data == NULL) { |
469 | ret = -ENOMEM; |
470 | goto err; |
471 | } |
472 | usb_fill_int_urb(urb: ushc->int_urb, dev: ushc->usb_dev, |
473 | usb_rcvintpipe(usb_dev, |
474 | intf->cur_altsetting->endpoint[0].desc.bEndpointAddress), |
475 | transfer_buffer: ushc->int_data, buffer_length: sizeof(struct ushc_int_data), |
476 | complete_fn: int_callback, context: ushc, |
477 | interval: intf->cur_altsetting->endpoint[0].desc.bInterval); |
478 | |
479 | ushc->cbw_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
480 | if (ushc->cbw_urb == NULL) { |
481 | ret = -ENOMEM; |
482 | goto err; |
483 | } |
484 | ushc->cbw = kzalloc(size: sizeof(struct ushc_cbw), GFP_KERNEL); |
485 | if (ushc->cbw == NULL) { |
486 | ret = -ENOMEM; |
487 | goto err; |
488 | } |
489 | ushc->cbw->signature = USHC_CBW_SIGNATURE; |
490 | |
491 | usb_fill_bulk_urb(urb: ushc->cbw_urb, dev: ushc->usb_dev, usb_sndbulkpipe(usb_dev, 2), |
492 | transfer_buffer: ushc->cbw, buffer_length: sizeof(struct ushc_cbw), |
493 | complete_fn: cbw_callback, context: ushc); |
494 | |
495 | ushc->data_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
496 | if (ushc->data_urb == NULL) { |
497 | ret = -ENOMEM; |
498 | goto err; |
499 | } |
500 | |
501 | ushc->csw_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
502 | if (ushc->csw_urb == NULL) { |
503 | ret = -ENOMEM; |
504 | goto err; |
505 | } |
506 | ushc->csw = kzalloc(size: sizeof(struct ushc_csw), GFP_KERNEL); |
507 | if (ushc->csw == NULL) { |
508 | ret = -ENOMEM; |
509 | goto err; |
510 | } |
511 | usb_fill_bulk_urb(urb: ushc->csw_urb, dev: ushc->usb_dev, usb_rcvbulkpipe(usb_dev, 6), |
512 | transfer_buffer: ushc->csw, buffer_length: sizeof(struct ushc_csw), |
513 | complete_fn: csw_callback, context: ushc); |
514 | |
515 | ret = mmc_add_host(ushc->mmc); |
516 | if (ret) |
517 | goto err; |
518 | |
519 | ret = usb_submit_urb(urb: ushc->int_urb, GFP_KERNEL); |
520 | if (ret < 0) { |
521 | mmc_remove_host(ushc->mmc); |
522 | goto err; |
523 | } |
524 | |
525 | return 0; |
526 | |
527 | err: |
528 | ushc_clean_up(ushc); |
529 | return ret; |
530 | } |
531 | |
532 | static void ushc_disconnect(struct usb_interface *intf) |
533 | { |
534 | struct ushc_data *ushc = usb_get_intfdata(intf); |
535 | |
536 | spin_lock_irq(lock: &ushc->lock); |
537 | set_bit(DISCONNECTED, addr: &ushc->flags); |
538 | spin_unlock_irq(lock: &ushc->lock); |
539 | |
540 | usb_kill_urb(urb: ushc->int_urb); |
541 | usb_kill_urb(urb: ushc->cbw_urb); |
542 | usb_kill_urb(urb: ushc->data_urb); |
543 | usb_kill_urb(urb: ushc->csw_urb); |
544 | |
545 | mmc_remove_host(ushc->mmc); |
546 | |
547 | ushc_clean_up(ushc); |
548 | } |
549 | |
550 | static struct usb_device_id ushc_id_table[] = { |
551 | /* CSR USB SD Host Controller */ |
552 | { USB_DEVICE(0x0a12, 0x5d10) }, |
553 | { }, |
554 | }; |
555 | MODULE_DEVICE_TABLE(usb, ushc_id_table); |
556 | |
557 | static struct usb_driver ushc_driver = { |
558 | .name = "ushc" , |
559 | .id_table = ushc_id_table, |
560 | .probe = ushc_probe, |
561 | .disconnect = ushc_disconnect, |
562 | }; |
563 | |
564 | module_usb_driver(ushc_driver); |
565 | |
566 | MODULE_DESCRIPTION("USB SD Host Controller driver" ); |
567 | MODULE_AUTHOR("David Vrabel <david.vrabel@csr.com>" ); |
568 | MODULE_LICENSE("GPL" ); |
569 | |