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/slab.h>
37 #include <linux/firmware.h>
38 #include <linux/delay.h>
39 #include <linux/mmc/card.h>
40 #include <linux/mmc/sdio_func.h>
41 #include <linux/mmc/sdio_ids.h>
42 #include <linux/module.h>
44 #include "smscoreapi.h"
45 #include "sms-cards.h"
46 #include "smsendian.h"
50 #define SMSSDIO_DATA 0x00
51 #define SMSSDIO_INT 0x04
52 #define SMSSDIO_BLOCK_SIZE 128
54 static const struct sdio_device_id smssdio_ids[] = {
55 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR),
56 .driver_data = SMS1XXX_BOARD_SIANO_STELLAR},
57 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0),
58 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_A},
59 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0),
60 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_B},
61 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0),
62 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
63 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE),
64 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
65 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x302),
66 .driver_data = SMS1XXX_BOARD_SIANO_MING},
67 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x500),
68 .driver_data = SMS1XXX_BOARD_SIANO_PELE},
69 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x600),
70 .driver_data = SMS1XXX_BOARD_SIANO_RIO},
71 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x700),
72 .driver_data = SMS1XXX_BOARD_SIANO_DENVER_2160},
73 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x800),
74 .driver_data = SMS1XXX_BOARD_SIANO_DENVER_1530},
75 { /* end: all zeroes */ },
78 MODULE_DEVICE_TABLE(sdio, smssdio_ids);
80 struct smssdio_device {
81 struct sdio_func *func;
83 struct smscore_device_t *coredev;
85 struct smscore_buffer_t *split_cb;
88 /*******************************************************************/
89 /* Siano core callbacks */
90 /*******************************************************************/
92 static int smssdio_sendrequest(void *context, void *buffer, size_t size)
95 struct smssdio_device *smsdev;
99 sdio_claim_host(smsdev->func);
101 smsendian_handle_tx_message((struct sms_msg_data *) buffer);
102 while (size >= smsdev->func->cur_blksize) {
103 ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
104 buffer, smsdev->func->cur_blksize);
108 buffer += smsdev->func->cur_blksize;
109 size -= smsdev->func->cur_blksize;
113 ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
118 sdio_release_host(smsdev->func);
123 /*******************************************************************/
125 /*******************************************************************/
127 static void smssdio_interrupt(struct sdio_func *func)
131 struct smssdio_device *smsdev;
132 struct smscore_buffer_t *cb;
133 struct sms_msg_hdr *hdr;
136 smsdev = sdio_get_drvdata(func);
139 * The interrupt register has no defined meaning. It is just
140 * a way of turning of the level triggered interrupt.
142 (void)sdio_readb(func, SMSSDIO_INT, &ret);
144 sms_err("Unable to read interrupt register!\n");
148 if (smsdev->split_cb == NULL) {
149 cb = smscore_getbuffer(smsdev->coredev);
151 sms_err("Unable to allocate data buffer!\n");
155 ret = sdio_memcpy_fromio(smsdev->func,
160 sms_err("Error %d reading initial block!\n", ret);
166 if (hdr->msg_flags & MSG_HDR_FLAG_SPLIT_MSG) {
167 smsdev->split_cb = cb;
171 if (hdr->msg_length > smsdev->func->cur_blksize)
172 size = hdr->msg_length - smsdev->func->cur_blksize;
176 cb = smsdev->split_cb;
179 size = hdr->msg_length - sizeof(struct sms_msg_hdr);
181 smsdev->split_cb = NULL;
187 buffer = cb->p + (hdr->msg_length - size);
188 size = ALIGN(size, SMSSDIO_BLOCK_SIZE);
190 BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE);
193 * First attempt to transfer all of it in one go...
195 ret = sdio_memcpy_fromio(smsdev->func,
199 if (ret && ret != -EINVAL) {
200 smscore_putbuffer(smsdev->coredev, cb);
201 sms_err("Error %d reading data from card!\n", ret);
206 * ..then fall back to one block at a time if that is
209 * (we have to do this manually because of the
210 * problem with the "increase address" bit)
212 if (ret == -EINVAL) {
214 ret = sdio_memcpy_fromio(smsdev->func,
215 buffer, SMSSDIO_DATA,
216 smsdev->func->cur_blksize);
218 smscore_putbuffer(smsdev->coredev, cb);
219 sms_err("Error %d reading "
220 "data from card!\n", ret);
224 buffer += smsdev->func->cur_blksize;
225 if (size > smsdev->func->cur_blksize)
226 size -= smsdev->func->cur_blksize;
233 cb->size = hdr->msg_length;
236 smsendian_handle_rx_message((struct sms_msg_data *) cb->p);
237 smscore_onresponse(smsdev->coredev, cb);
240 static int smssdio_probe(struct sdio_func *func,
241 const struct sdio_device_id *id)
246 struct smssdio_device *smsdev;
247 struct smsdevice_params_t params;
249 board_id = id->driver_data;
251 smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL);
257 memset(¶ms, 0, sizeof(struct smsdevice_params_t));
259 params.device = &func->dev;
260 params.buffer_size = 0x5000; /* ?? */
261 params.num_buffers = 22; /* ?? */
262 params.context = smsdev;
264 snprintf(params.devpath, sizeof(params.devpath),
265 "sdio\\%s", sdio_func_id(func));
267 params.sendrequest_handler = smssdio_sendrequest;
269 params.device_type = sms_get_board(board_id)->type;
271 if (params.device_type != SMS_STELLAR)
272 params.flags |= SMS_DEVICE_FAMILY2;
275 * FIXME: Stellar needs special handling...
281 ret = smscore_register_device(¶ms, &smsdev->coredev);
285 smscore_set_board_id(smsdev->coredev, board_id);
287 sdio_claim_host(func);
289 ret = sdio_enable_func(func);
293 ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE);
297 ret = sdio_claim_irq(func, smssdio_interrupt);
301 sdio_set_drvdata(func, smsdev);
303 sdio_release_host(func);
305 ret = smscore_start_device(smsdev->coredev);
312 sdio_claim_host(func);
313 sdio_release_irq(func);
315 sdio_disable_func(func);
317 sdio_release_host(func);
318 smscore_unregister_device(smsdev->coredev);
325 static void smssdio_remove(struct sdio_func *func)
327 struct smssdio_device *smsdev;
329 smsdev = sdio_get_drvdata(func);
332 if (smsdev->split_cb)
333 smscore_putbuffer(smsdev->coredev, smsdev->split_cb);
335 smscore_unregister_device(smsdev->coredev);
337 sdio_claim_host(func);
338 sdio_release_irq(func);
339 sdio_disable_func(func);
340 sdio_release_host(func);
345 static struct sdio_driver smssdio_driver = {
347 .id_table = smssdio_ids,
348 .probe = smssdio_probe,
349 .remove = smssdio_remove,
352 /*******************************************************************/
353 /* Module functions */
354 /*******************************************************************/
356 static int __init smssdio_module_init(void)
360 printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n");
361 printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n");
363 ret = sdio_register_driver(&smssdio_driver);
368 static void __exit smssdio_module_exit(void)
370 sdio_unregister_driver(&smssdio_driver);
373 module_init(smssdio_module_init);
374 module_exit(smssdio_module_exit);
376 MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver");
377 MODULE_AUTHOR("Pierre Ossman");
378 MODULE_LICENSE("GPL");