1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * USB SD Host Controller (USHC) controller driver.
8  *   - Only version 2 devices are supported.
9  *   - Version 2 devices only support SDIO cards/devices (R2 response is
13  *   [USHC] USB SD Host Controller specification (CS-118793-SP)
19 #include <linux/dma-mapping.h>
20 #include <linux/mmc/host.h>
91 	struct mmc_host *mmc;  member
121 	return usb_control_msg(ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0),  in ushc_hw_reset()
131 	ret = usb_control_msg(ushc->usb_dev, usb_rcvctrlpipe(ushc->usb_dev, 0),  in ushc_hw_get_caps()
133 			      0, 0, &ushc->caps, sizeof(ushc->caps), 100);  in ushc_hw_get_caps()
137 	ushc->caps = le32_to_cpu(ushc->caps);  in ushc_hw_get_caps()
139 	version = ushc->caps & USHC_GET_CAPS_VERSION_MASK;  in ushc_hw_get_caps()
141 		dev_err(&ushc->usb_dev->dev, "controller version %d is not supported\n", version);  in ushc_hw_get_caps()
142 		return -EINVAL;  in ushc_hw_get_caps()
153 	host_ctrl = (ushc->host_ctrl & ~mask) | val;  in ushc_hw_set_host_ctrl()
154 	ret = usb_control_msg(ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0),  in ushc_hw_set_host_ctrl()
159 	ushc->host_ctrl = host_ctrl;  in ushc_hw_set_host_ctrl()
165 	struct ushc_data *ushc = urb->context;  in int_callback()
168 	if (urb->status < 0)  in int_callback()
171 	status = ushc->int_data->status;  in int_callback()
172 	last_status = ushc->last_status;  in int_callback()
173 	ushc->last_status = status;  in int_callback()
183 	if (!test_and_clear_bit(IGNORE_NEXT_INT, &ushc->flags)  in int_callback()
184 	    && test_bit(INT_EN, &ushc->flags)  in int_callback()
186 		mmc_signal_sdio_irq(ushc->mmc);  in int_callback()
190 		mmc_detect_change(ushc->mmc, msecs_to_jiffies(100));  in int_callback()
192 	if (!test_bit(INT_EN, &ushc->flags))  in int_callback()
193 		set_bit(IGNORE_NEXT_INT, &ushc->flags);  in int_callback()
194 	usb_submit_urb(ushc->int_urb, GFP_ATOMIC);  in int_callback()
199 	struct ushc_data *ushc = urb->context;  in cbw_callback()
201 	if (urb->status != 0) {  in cbw_callback()
202 		usb_unlink_urb(ushc->data_urb);  in cbw_callback()
203 		usb_unlink_urb(ushc->csw_urb);  in cbw_callback()
209 	struct ushc_data *ushc = urb->context;  in data_callback()
211 	if (urb->status != 0)  in data_callback()
212 		usb_unlink_urb(ushc->csw_urb);  in data_callback()
217 	struct ushc_data *ushc = urb->context;  in csw_callback()
218 	struct mmc_request *req = ushc->current_req;  in csw_callback()
221 	status = ushc->csw->status;  in csw_callback()
223 	if (urb->status != 0) {  in csw_callback()
224 		req->cmd->error = urb->status;  in csw_callback()
227 			req->cmd->error = -EIO;  in csw_callback()
229 			req->cmd->error = -ETIMEDOUT;  in csw_callback()
231 	if (req->data) {  in csw_callback()
234 				req->data->error = -EIO;  in csw_callback()
236 				req->data->error = -ETIMEDOUT;  in csw_callback()
237 			req->data->bytes_xfered = 0;  in csw_callback()
239 			req->data->bytes_xfered = req->data->blksz * req->data->blocks;  in csw_callback()
243 	req->cmd->resp[0] = le32_to_cpu(ushc->csw->response);  in csw_callback()
245 	mmc_request_done(ushc->mmc, req);  in csw_callback()
248 static void ushc_request(struct mmc_host *mmc, struct mmc_request *req)  in ushc_request()  argument
250 	struct ushc_data *ushc = mmc_priv(mmc);  in ushc_request()
254 	spin_lock_irqsave(&ushc->lock, flags);  in ushc_request()
256 	if (test_bit(DISCONNECTED, &ushc->flags)) {  in ushc_request()
257 		ret = -ENODEV;  in ushc_request()
262 	if (req->cmd->flags & MMC_RSP_136) {  in ushc_request()
263 		ret = -EINVAL;  in ushc_request()
269 	if (req->data && ushc->clock_freq < 6000000) {  in ushc_request()
270 		ret = -EINVAL;  in ushc_request()
274 	ushc->current_req = req;  in ushc_request()
277 	ushc->cbw->cmd_idx = cpu_to_le16(req->cmd->opcode);  in ushc_request()
278 	if (req->data)  in ushc_request()
279 		ushc->cbw->block_size = cpu_to_le16(req->data->blksz);  in ushc_request()
281 		ushc->cbw->block_size = 0;  in ushc_request()
282 	ushc->cbw->arg = cpu_to_le32(req->cmd->arg);  in ushc_request()
284 	ret = usb_submit_urb(ushc->cbw_urb, GFP_ATOMIC);  in ushc_request()
289 	if (req->data) {  in ushc_request()
290 		struct mmc_data *data = req->data;  in ushc_request()
293 		if (data->flags & MMC_DATA_READ)  in ushc_request()
294 			pipe = usb_rcvbulkpipe(ushc->usb_dev, 6);  in ushc_request()
296 			pipe = usb_sndbulkpipe(ushc->usb_dev, 2);  in ushc_request()
298 		usb_fill_bulk_urb(ushc->data_urb, ushc->usb_dev, pipe,  in ushc_request()
299 				  NULL, data->sg->length,  in ushc_request()
301 		ushc->data_urb->num_sgs = 1;  in ushc_request()
302 		ushc->data_urb->sg = data->sg;  in ushc_request()
303 		ret = usb_submit_urb(ushc->data_urb, GFP_ATOMIC);  in ushc_request()
309 	ret = usb_submit_urb(ushc->csw_urb, GFP_ATOMIC);  in ushc_request()
312 	spin_unlock_irqrestore(&ushc->lock, flags);  in ushc_request()
314 		usb_unlink_urb(ushc->cbw_urb);  in ushc_request()
315 		usb_unlink_urb(ushc->data_urb);  in ushc_request()
316 		req->cmd->error = ret;  in ushc_request()
317 		mmc_request_done(mmc, req);  in ushc_request()
334 		return -EINVAL;  in ushc_set_power()
337 	return usb_control_msg(ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0),  in ushc_set_power()
361 	ret = usb_control_msg(ushc->usb_dev, usb_sndctrlpipe(ushc->usb_dev, 0),  in ushc_set_bus_freq()
367 	ushc->clock_freq = clk;  in ushc_set_bus_freq()
371 static void ushc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)  in ushc_set_ios()  argument
373 	struct ushc_data *ushc = mmc_priv(mmc);  in ushc_set_ios()
375 	ushc_set_power(ushc, ios->power_mode);  in ushc_set_ios()
376 	ushc_set_bus_width(ushc, 1 << ios->bus_width);  in ushc_set_ios()
377 	ushc_set_bus_freq(ushc, ios->clock, ios->timing == MMC_TIMING_SD_HS);  in ushc_set_ios()
380 static int ushc_get_cd(struct mmc_host *mmc)  in ushc_get_cd()  argument
382 	struct ushc_data *ushc = mmc_priv(mmc);  in ushc_get_cd()
384 	return !!(ushc->last_status & USHC_INT_STATUS_CARD_PRESENT);  in ushc_get_cd()
387 static void ushc_enable_sdio_irq(struct mmc_host *mmc, int enable)  in ushc_enable_sdio_irq()  argument
389 	struct ushc_data *ushc = mmc_priv(mmc);  in ushc_enable_sdio_irq()
392 		set_bit(INT_EN, &ushc->flags);  in ushc_enable_sdio_irq()
394 		clear_bit(INT_EN, &ushc->flags);  in ushc_enable_sdio_irq()
399 	usb_free_urb(ushc->int_urb);  in ushc_clean_up()
400 	usb_free_urb(ushc->csw_urb);  in ushc_clean_up()
401 	usb_free_urb(ushc->data_urb);  in ushc_clean_up()
402 	usb_free_urb(ushc->cbw_urb);  in ushc_clean_up()
404 	kfree(ushc->int_data);  in ushc_clean_up()
405 	kfree(ushc->cbw);  in ushc_clean_up()
406 	kfree(ushc->csw);  in ushc_clean_up()
408 	mmc_free_host(ushc->mmc);  in ushc_clean_up()
421 	struct mmc_host *mmc;  in ushc_probe()  local
425 	if (intf->cur_altsetting->desc.bNumEndpoints < 1)  in ushc_probe()
426 		return -ENODEV;  in ushc_probe()
428 	mmc = mmc_alloc_host(sizeof(struct ushc_data), &intf->dev);  in ushc_probe()
429 	if (mmc == NULL)  in ushc_probe()
430 		return -ENOMEM;  in ushc_probe()
431 	ushc = mmc_priv(mmc);  in ushc_probe()
434 	ushc->usb_dev = usb_dev;  in ushc_probe()
435 	ushc->mmc = mmc;  in ushc_probe()
437 	spin_lock_init(&ushc->lock);  in ushc_probe()
448 	mmc->ops = &ushc_ops;  in ushc_probe()
450 	mmc->f_min = 400000;  in ushc_probe()
451 	mmc->f_max = 50000000;  in ushc_probe()
452 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;  in ushc_probe()
453 	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;  in ushc_probe()
454 	mmc->caps |= (ushc->caps & USHC_GET_CAPS_HIGH_SPD) ? MMC_CAP_SD_HIGHSPEED : 0;  in ushc_probe()
456 	mmc->max_seg_size  = 512*511;  in ushc_probe()
457 	mmc->max_segs      = 1;  in ushc_probe()
458 	mmc->max_req_size  = 512*511;  in ushc_probe()
459 	mmc->max_blk_size  = 512;  in ushc_probe()
460 	mmc->max_blk_count = 511;  in ushc_probe()
462 	ushc->int_urb = usb_alloc_urb(0, GFP_KERNEL);  in ushc_probe()
463 	if (ushc->int_urb == NULL) {  in ushc_probe()
464 		ret = -ENOMEM;  in ushc_probe()
467 	ushc->int_data = kzalloc(sizeof(struct ushc_int_data), GFP_KERNEL);  in ushc_probe()
468 	if (ushc->int_data == NULL) {  in ushc_probe()
469 		ret = -ENOMEM;  in ushc_probe()
472 	usb_fill_int_urb(ushc->int_urb, ushc->usb_dev,  in ushc_probe()
474 					intf->cur_altsetting->endpoint[0].desc.bEndpointAddress),  in ushc_probe()
475 			 ushc->int_data, sizeof(struct ushc_int_data),  in ushc_probe()
477 			 intf->cur_altsetting->endpoint[0].desc.bInterval);  in ushc_probe()
479 	ushc->cbw_urb = usb_alloc_urb(0, GFP_KERNEL);  in ushc_probe()
480 	if (ushc->cbw_urb == NULL) {  in ushc_probe()
481 		ret = -ENOMEM;  in ushc_probe()
484 	ushc->cbw = kzalloc(sizeof(struct ushc_cbw), GFP_KERNEL);  in ushc_probe()
485 	if (ushc->cbw == NULL) {  in ushc_probe()
486 		ret = -ENOMEM;  in ushc_probe()
489 	ushc->cbw->signature = USHC_CBW_SIGNATURE;  in ushc_probe()
491 	usb_fill_bulk_urb(ushc->cbw_urb, ushc->usb_dev, usb_sndbulkpipe(usb_dev, 2),  in ushc_probe()
492 			  ushc->cbw, sizeof(struct ushc_cbw),  in ushc_probe()
495 	ushc->data_urb = usb_alloc_urb(0, GFP_KERNEL);  in ushc_probe()
496 	if (ushc->data_urb == NULL) {  in ushc_probe()
497 		ret = -ENOMEM;  in ushc_probe()
501 	ushc->csw_urb = usb_alloc_urb(0, GFP_KERNEL);  in ushc_probe()
502 	if (ushc->csw_urb == NULL) {  in ushc_probe()
503 		ret = -ENOMEM;  in ushc_probe()
506 	ushc->csw = kzalloc(sizeof(struct ushc_csw), GFP_KERNEL);  in ushc_probe()
507 	if (ushc->csw == NULL) {  in ushc_probe()
508 		ret = -ENOMEM;  in ushc_probe()
511 	usb_fill_bulk_urb(ushc->csw_urb, ushc->usb_dev, usb_rcvbulkpipe(usb_dev, 6),  in ushc_probe()
512 			  ushc->csw, sizeof(struct ushc_csw),  in ushc_probe()
515 	ret = mmc_add_host(ushc->mmc);  in ushc_probe()
519 	ret = usb_submit_urb(ushc->int_urb, GFP_KERNEL);  in ushc_probe()
521 		mmc_remove_host(ushc->mmc);  in ushc_probe()
536 	spin_lock_irq(&ushc->lock);  in ushc_disconnect()
537 	set_bit(DISCONNECTED, &ushc->flags);  in ushc_disconnect()
538 	spin_unlock_irq(&ushc->lock);  in ushc_disconnect()
540 	usb_kill_urb(ushc->int_urb);  in ushc_disconnect()
541 	usb_kill_urb(ushc->cbw_urb);  in ushc_disconnect()
542 	usb_kill_urb(ushc->data_urb);  in ushc_disconnect()
543 	usb_kill_urb(ushc->csw_urb);  in ushc_disconnect()
545 	mmc_remove_host(ushc->mmc);  in ushc_disconnect()
551 	/* CSR USB SD Host Controller */
566 MODULE_DESCRIPTION("USB SD Host Controller driver");