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 "smscoreapi.h"
37 #include <linux/moduleparam.h>
38 #include <linux/slab.h>
39 #include <linux/firmware.h>
40 #include <linux/delay.h>
41 #include <linux/mmc/card.h>
42 #include <linux/mmc/sdio_func.h>
43 #include <linux/mmc/sdio_ids.h>
44 #include <linux/module.h>
46 #include "sms-cards.h"
47 #include "smsendian.h"
51 #define SMSSDIO_DATA 0x00
52 #define SMSSDIO_INT 0x04
53 #define SMSSDIO_BLOCK_SIZE 128
55 static const struct sdio_device_id smssdio_ids[] = {
56 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR),
57 .driver_data = SMS1XXX_BOARD_SIANO_STELLAR},
58 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0),
59 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_A},
60 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0),
61 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_B},
62 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0),
63 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
64 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE),
65 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
66 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x302),
67 .driver_data = SMS1XXX_BOARD_SIANO_MING},
68 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x500),
69 .driver_data = SMS1XXX_BOARD_SIANO_PELE},
70 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x600),
71 .driver_data = SMS1XXX_BOARD_SIANO_RIO},
72 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x700),
73 .driver_data = SMS1XXX_BOARD_SIANO_DENVER_2160},
74 {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x800),
75 .driver_data = SMS1XXX_BOARD_SIANO_DENVER_1530},
76 { /* end: all zeroes */ },
79 MODULE_DEVICE_TABLE(sdio, smssdio_ids);
81 struct smssdio_device {
82 struct sdio_func *func;
84 struct smscore_device_t *coredev;
86 struct smscore_buffer_t *split_cb;
89 /*******************************************************************/
90 /* Siano core callbacks */
91 /*******************************************************************/
93 static int smssdio_sendrequest(void *context, void *buffer, size_t size)
96 struct smssdio_device *smsdev;
100 sdio_claim_host(smsdev->func);
102 smsendian_handle_tx_message((struct sms_msg_data *) buffer);
103 while (size >= smsdev->func->cur_blksize) {
104 ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
105 buffer, smsdev->func->cur_blksize);
109 buffer += smsdev->func->cur_blksize;
110 size -= smsdev->func->cur_blksize;
114 ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
119 sdio_release_host(smsdev->func);
124 /*******************************************************************/
126 /*******************************************************************/
128 static void smssdio_interrupt(struct sdio_func *func)
132 struct smssdio_device *smsdev;
133 struct smscore_buffer_t *cb;
134 struct sms_msg_hdr *hdr;
137 smsdev = sdio_get_drvdata(func);
140 * The interrupt register has no defined meaning. It is just
141 * a way of turning of the level triggered interrupt.
143 (void)sdio_readb(func, SMSSDIO_INT, &ret);
145 pr_err("Unable to read interrupt register!\n");
149 if (smsdev->split_cb == NULL) {
150 cb = smscore_getbuffer(smsdev->coredev);
152 pr_err("Unable to allocate data buffer!\n");
156 ret = sdio_memcpy_fromio(smsdev->func,
161 pr_err("Error %d reading initial block!\n", ret);
167 if (hdr->msg_flags & MSG_HDR_FLAG_SPLIT_MSG) {
168 smsdev->split_cb = cb;
172 if (hdr->msg_length > smsdev->func->cur_blksize)
173 size = hdr->msg_length - smsdev->func->cur_blksize;
177 cb = smsdev->split_cb;
180 size = hdr->msg_length - sizeof(struct sms_msg_hdr);
182 smsdev->split_cb = NULL;
188 buffer = cb->p + (hdr->msg_length - size);
189 size = ALIGN(size, SMSSDIO_BLOCK_SIZE);
191 BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE);
194 * First attempt to transfer all of it in one go...
196 ret = sdio_memcpy_fromio(smsdev->func,
200 if (ret && ret != -EINVAL) {
201 smscore_putbuffer(smsdev->coredev, cb);
202 pr_err("Error %d reading data from card!\n", ret);
207 * ..then fall back to one block at a time if that is
210 * (we have to do this manually because of the
211 * problem with the "increase address" bit)
213 if (ret == -EINVAL) {
215 ret = sdio_memcpy_fromio(smsdev->func,
216 buffer, SMSSDIO_DATA,
217 smsdev->func->cur_blksize);
219 smscore_putbuffer(smsdev->coredev, cb);
220 pr_err("Error %d reading data from card!\n",
225 buffer += smsdev->func->cur_blksize;
226 if (size > smsdev->func->cur_blksize)
227 size -= smsdev->func->cur_blksize;
234 cb->size = hdr->msg_length;
237 smsendian_handle_rx_message((struct sms_msg_data *) cb->p);
238 smscore_onresponse(smsdev->coredev, cb);
241 static int smssdio_probe(struct sdio_func *func,
242 const struct sdio_device_id *id)
247 struct smssdio_device *smsdev;
248 struct smsdevice_params_t params;
250 board_id = id->driver_data;
252 smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL);
258 memset(¶ms, 0, sizeof(struct smsdevice_params_t));
260 params.device = &func->dev;
261 params.buffer_size = 0x5000; /* ?? */
262 params.num_buffers = 22; /* ?? */
263 params.context = smsdev;
265 snprintf(params.devpath, sizeof(params.devpath),
266 "sdio\\%s", sdio_func_id(func));
268 params.sendrequest_handler = smssdio_sendrequest;
270 params.device_type = sms_get_board(board_id)->type;
272 if (params.device_type != SMS_STELLAR)
273 params.flags |= SMS_DEVICE_FAMILY2;
276 * FIXME: Stellar needs special handling...
282 ret = smscore_register_device(¶ms, &smsdev->coredev, NULL);
286 smscore_set_board_id(smsdev->coredev, board_id);
288 sdio_claim_host(func);
290 ret = sdio_enable_func(func);
294 ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE);
298 ret = sdio_claim_irq(func, smssdio_interrupt);
302 sdio_set_drvdata(func, smsdev);
304 sdio_release_host(func);
306 ret = smscore_start_device(smsdev->coredev);
313 sdio_claim_host(func);
314 sdio_release_irq(func);
316 sdio_disable_func(func);
318 sdio_release_host(func);
319 smscore_unregister_device(smsdev->coredev);
326 static void smssdio_remove(struct sdio_func *func)
328 struct smssdio_device *smsdev;
330 smsdev = sdio_get_drvdata(func);
333 if (smsdev->split_cb)
334 smscore_putbuffer(smsdev->coredev, smsdev->split_cb);
336 smscore_unregister_device(smsdev->coredev);
338 sdio_claim_host(func);
339 sdio_release_irq(func);
340 sdio_disable_func(func);
341 sdio_release_host(func);
346 static struct sdio_driver smssdio_driver = {
348 .id_table = smssdio_ids,
349 .probe = smssdio_probe,
350 .remove = smssdio_remove,
353 /*******************************************************************/
354 /* Module functions */
355 /*******************************************************************/
357 static int __init smssdio_module_init(void)
361 printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n");
362 printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n");
364 ret = sdio_register_driver(&smssdio_driver);
369 static void __exit smssdio_module_exit(void)
371 sdio_unregister_driver(&smssdio_driver);
374 module_init(smssdio_module_init);
375 module_exit(smssdio_module_exit);
377 MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver");
378 MODULE_AUTHOR("Pierre Ossman");
379 MODULE_LICENSE("GPL");