2 * smssdio.c - Siano 1xxx SDIO interface driver
4 * Copyright 2008 Pierre Ossman
6 * Based on code by Siano Mobile Silicon, Inc.,
7 * Copyright (C) 2006-2008, Uri Shkolnik
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
15 * This hardware is a bit odd in that all transfers should be done
16 * to/from the SMSSDIO_DATA register, yet the "increase address" bit
17 * always needs to be set.
19 * Also, buffers from the card are always aligned to 128 byte
24 * General cleanup notes:
26 * - only typedefs should be name *_t
28 * - use ERR_PTR and friends for smscore_register_device()
30 * - smscore_getbuffer should zero fields
35 #include <linux/moduleparam.h>
36 #include <linux/firmware.h>
37 #include <linux/delay.h>
38 #include <linux/mmc/card.h>
39 #include <linux/mmc/sdio_func.h>
40 #include <linux/mmc/sdio_ids.h>
42 #include "smscoreapi.h"
43 #include "sms-cards.h"
47 #define SMSSDIO_DATA 0x00
48 #define SMSSDIO_INT 0x04
50 static const struct sdio_device_id smssdio_ids[] = {
51 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR),
52 .driver_data = SMS1XXX_BOARD_SIANO_STELLAR},
53 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0),
54 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_A},
55 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0),
56 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_B},
57 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0),
58 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
59 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE),
60 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
61 { /* end: all zeroes */ },
64 MODULE_DEVICE_TABLE(sdio, smssdio_ids);
66 struct smssdio_device {
67 struct sdio_func *func;
69 struct smscore_device_t *coredev;
71 struct smscore_buffer_t *split_cb;
74 /*******************************************************************/
75 /* Siano core callbacks */
76 /*******************************************************************/
78 static int smssdio_sendrequest(void *context, void *buffer, size_t size)
81 struct smssdio_device *smsdev;
85 sdio_claim_host(smsdev->func);
87 while (size >= smsdev->func->cur_blksize) {
88 ret = sdio_write_blocks(smsdev->func, SMSSDIO_DATA, buffer, 1);
92 buffer += smsdev->func->cur_blksize;
93 size -= smsdev->func->cur_blksize;
97 ret = sdio_write_bytes(smsdev->func, SMSSDIO_DATA,
104 sdio_release_host(smsdev->func);
109 /*******************************************************************/
111 /*******************************************************************/
113 static void smssdio_interrupt(struct sdio_func *func)
117 struct smssdio_device *smsdev;
118 struct smscore_buffer_t *cb;
119 struct SmsMsgHdr_ST *hdr;
122 smsdev = sdio_get_drvdata(func);
125 * The interrupt register has no defined meaning. It is just
126 * a way of turning of the level triggered interrupt.
128 isr = sdio_readb(func, SMSSDIO_INT, &ret);
130 dev_err(&smsdev->func->dev,
131 "Unable to read interrupt register!\n");
135 if (smsdev->split_cb == NULL) {
136 cb = smscore_getbuffer(smsdev->coredev);
138 dev_err(&smsdev->func->dev,
139 "Unable to allocate data buffer!\n");
143 ret = sdio_read_blocks(smsdev->func, cb->p, SMSSDIO_DATA, 1);
145 dev_err(&smsdev->func->dev,
146 "Error %d reading initial block!\n", ret);
152 if (hdr->msgFlags & MSG_HDR_FLAG_SPLIT_MSG) {
153 smsdev->split_cb = cb;
157 size = hdr->msgLength - smsdev->func->cur_blksize;
159 cb = smsdev->split_cb;
162 size = hdr->msgLength - sizeof(struct SmsMsgHdr_ST);
164 smsdev->split_cb = NULL;
167 if (hdr->msgLength > smsdev->func->cur_blksize) {
170 size = ALIGN(size, 128);
171 buffer = cb->p + hdr->msgLength;
173 BUG_ON(smsdev->func->cur_blksize != 128);
176 * First attempt to transfer all of it in one go...
178 ret = sdio_read_blocks(smsdev->func, buffer,
179 SMSSDIO_DATA, size / 128);
180 if (ret && ret != -EINVAL) {
181 smscore_putbuffer(smsdev->coredev, cb);
182 dev_err(&smsdev->func->dev,
183 "Error %d reading data from card!\n", ret);
188 * ..then fall back to one block at a time if that is
191 * (we have to do this manually because of the
192 * problem with the "increase address" bit)
194 if (ret == -EINVAL) {
196 ret = sdio_read_blocks(smsdev->func,
197 buffer, SMSSDIO_DATA, 1);
199 smscore_putbuffer(smsdev->coredev, cb);
200 dev_err(&smsdev->func->dev,
202 "data from card!\n", ret);
206 buffer += smsdev->func->cur_blksize;
207 if (size > smsdev->func->cur_blksize)
208 size -= smsdev->func->cur_blksize;
215 cb->size = hdr->msgLength;
218 smscore_onresponse(smsdev->coredev, cb);
221 static int smssdio_probe(struct sdio_func *func,
222 const struct sdio_device_id *id)
227 struct smssdio_device *smsdev;
228 struct smsdevice_params_t params;
230 board_id = id->driver_data;
232 smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL);
238 memset(¶ms, 0, sizeof(struct smsdevice_params_t));
240 params.device = &func->dev;
241 params.buffer_size = 0x5000; /* ?? */
242 params.num_buffers = 22; /* ?? */
243 params.context = smsdev;
245 snprintf(params.devpath, sizeof(params.devpath),
246 "sdio\\%s", sdio_func_id(func));
248 params.sendrequest_handler = smssdio_sendrequest;
250 params.device_type = sms_get_board(board_id)->type;
252 if (params.device_type != SMS_STELLAR)
253 params.flags |= SMS_DEVICE_FAMILY2;
256 * FIXME: Stellar needs special handling...
262 ret = smscore_register_device(¶ms, &smsdev->coredev);
266 smscore_set_board_id(smsdev->coredev, board_id);
268 sdio_claim_host(func);
270 ret = sdio_enable_func(func);
274 ret = sdio_set_block_size(func, 128);
278 ret = sdio_claim_irq(func, smssdio_interrupt);
282 sdio_set_drvdata(func, smsdev);
284 sdio_release_host(func);
286 ret = smscore_start_device(smsdev->coredev);
293 sdio_claim_host(func);
294 sdio_release_irq(func);
296 sdio_disable_func(func);
298 sdio_release_host(func);
299 smscore_unregister_device(smsdev->coredev);
306 static void smssdio_remove(struct sdio_func *func)
308 struct smssdio_device *smsdev;
310 smsdev = sdio_get_drvdata(func);
313 if (smsdev->split_cb)
314 smscore_putbuffer(smsdev->coredev, smsdev->split_cb);
316 smscore_unregister_device(smsdev->coredev);
318 sdio_claim_host(func);
319 sdio_release_irq(func);
320 sdio_disable_func(func);
321 sdio_release_host(func);
326 static struct sdio_driver smssdio_driver = {
328 .id_table = smssdio_ids,
329 .probe = smssdio_probe,
330 .remove = smssdio_remove,
333 /*******************************************************************/
334 /* Module functions */
335 /*******************************************************************/
337 int smssdio_register(void)
341 printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n");
342 printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n");
344 ret = sdio_register_driver(&smssdio_driver);
349 void smssdio_unregister(void)
351 sdio_unregister_driver(&smssdio_driver);
354 MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver");
355 MODULE_AUTHOR("Pierre Ossman");
356 MODULE_LICENSE("GPL");