1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  smssdio.c - Siano 1xxx SDIO interface driver
8  * Copyright (C) 2006-2008, Uri Shkolnik
21  * - only typedefs should be name *_t
23  * - use ERR_PTR and friends for smscore_register_device()
25  * - smscore_getbuffer should zero fields
41 #include "sms-cards.h"
77 	struct sdio_func *func;  member
95 	sdio_claim_host(smsdev->func);  in smssdio_sendrequest()
98 	while (size >= smsdev->func->cur_blksize) {  in smssdio_sendrequest()
99 		ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,  in smssdio_sendrequest()
100 					buffer, smsdev->func->cur_blksize);  in smssdio_sendrequest()
104 		buffer += smsdev->func->cur_blksize;  in smssdio_sendrequest()
105 		size -= smsdev->func->cur_blksize;  in smssdio_sendrequest()
109 		ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,  in smssdio_sendrequest()
114 	sdio_release_host(smsdev->func);  in smssdio_sendrequest()
123 static void smssdio_interrupt(struct sdio_func *func)  in smssdio_interrupt()  argument
132 	smsdev = sdio_get_drvdata(func);  in smssdio_interrupt()
138 	(void)sdio_readb(func, SMSSDIO_INT, &ret);  in smssdio_interrupt()
144 	if (smsdev->split_cb == NULL) {  in smssdio_interrupt()
145 		cb = smscore_getbuffer(smsdev->coredev);  in smssdio_interrupt()
151 		ret = sdio_memcpy_fromio(smsdev->func,  in smssdio_interrupt()
152 					 cb->p,  in smssdio_interrupt()
160 		hdr = cb->p;  in smssdio_interrupt()
162 		if (hdr->msg_flags & MSG_HDR_FLAG_SPLIT_MSG) {  in smssdio_interrupt()
163 			smsdev->split_cb = cb;  in smssdio_interrupt()
167 		if (hdr->msg_length > smsdev->func->cur_blksize)  in smssdio_interrupt()
168 			size = hdr->msg_length - smsdev->func->cur_blksize;  in smssdio_interrupt()
172 		cb = smsdev->split_cb;  in smssdio_interrupt()
173 		hdr = cb->p;  in smssdio_interrupt()
175 		size = hdr->msg_length - sizeof(struct sms_msg_hdr);  in smssdio_interrupt()
177 		smsdev->split_cb = NULL;  in smssdio_interrupt()
183 		buffer = cb->p + (hdr->msg_length - size);  in smssdio_interrupt()
186 		BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE);  in smssdio_interrupt()
191 		ret = sdio_memcpy_fromio(smsdev->func,  in smssdio_interrupt()
195 		if (ret && ret != -EINVAL) {  in smssdio_interrupt()
196 			smscore_putbuffer(smsdev->coredev, cb);  in smssdio_interrupt()
208 		if (ret == -EINVAL) {  in smssdio_interrupt()
210 				ret = sdio_memcpy_fromio(smsdev->func,  in smssdio_interrupt()
212 						  smsdev->func->cur_blksize);  in smssdio_interrupt()
214 					smscore_putbuffer(smsdev->coredev, cb);  in smssdio_interrupt()
220 				buffer += smsdev->func->cur_blksize;  in smssdio_interrupt()
221 				if (size > smsdev->func->cur_blksize)  in smssdio_interrupt()
222 					size -= smsdev->func->cur_blksize;  in smssdio_interrupt()
229 	cb->size = hdr->msg_length;  in smssdio_interrupt()
230 	cb->offset = 0;  in smssdio_interrupt()
232 	smsendian_handle_rx_message((struct sms_msg_data *) cb->p);  in smssdio_interrupt()
233 	smscore_onresponse(smsdev->coredev, cb);  in smssdio_interrupt()
236 static int smssdio_probe(struct sdio_func *func,  in smssdio_probe()  argument
245 	board_id = id->driver_data;  in smssdio_probe()
249 		return -ENOMEM;  in smssdio_probe()
251 	smsdev->func = func;  in smssdio_probe()
255 	params.device = &func->dev;  in smssdio_probe()
261 		 "sdio\\%s", sdio_func_id(func));  in smssdio_probe()
265 	params.device_type = sms_get_board(board_id)->type;  in smssdio_probe()
273 		ret = -ENODEV;  in smssdio_probe()
277 	ret = smscore_register_device(&params, &smsdev->coredev, GFP_DMA, NULL);  in smssdio_probe()
281 	smscore_set_board_id(smsdev->coredev, board_id);  in smssdio_probe()
283 	sdio_claim_host(func);  in smssdio_probe()
285 	ret = sdio_enable_func(func);  in smssdio_probe()
289 	ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE);  in smssdio_probe()
293 	ret = sdio_claim_irq(func, smssdio_interrupt);  in smssdio_probe()
297 	sdio_set_drvdata(func, smsdev);  in smssdio_probe()
299 	sdio_release_host(func);  in smssdio_probe()
301 	ret = smscore_start_device(smsdev->coredev);  in smssdio_probe()
308 	sdio_claim_host(func);  in smssdio_probe()
309 	sdio_release_irq(func);  in smssdio_probe()
311 	sdio_disable_func(func);  in smssdio_probe()
313 	sdio_release_host(func);  in smssdio_probe()
314 	smscore_unregister_device(smsdev->coredev);  in smssdio_probe()
321 static void smssdio_remove(struct sdio_func *func)  in smssdio_remove()  argument
325 	smsdev = sdio_get_drvdata(func);  in smssdio_remove()
328 	if (smsdev->split_cb)  in smssdio_remove()
329 		smscore_putbuffer(smsdev->coredev, smsdev->split_cb);  in smssdio_remove()
331 	smscore_unregister_device(smsdev->coredev);  in smssdio_remove()
333 	sdio_claim_host(func);  in smssdio_remove()
334 	sdio_release_irq(func);  in smssdio_remove()
335 	sdio_disable_func(func);  in smssdio_remove()
336 	sdio_release_host(func);  in smssdio_remove()