[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / mmc / siano / smssdio.c

/*
 *  smssdio.c - Siano 1xxx SDIO interface driver
 *
 *  Copyright 2008 Pierre Ossman
 *
 * Based on code by Siano Mobile Silicon, Inc.,
 * Copyright (C) 2006-2008, Uri Shkolnik
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 *
 * This hardware is a bit odd in that all transfers should be done
 * to/from the SMSSDIO_DATA register, yet the "increase address" bit
 * always needs to be set.
 *
 * Also, buffers from the card are always aligned to 128 byte
 * boundaries.
 */

/*
 * General cleanup notes:
 *
 * - only typedefs should be name *_t
 *
 * - use ERR_PTR and friends for smscore_register_device()
 *
 * - smscore_getbuffer should zero fields
 *
 * Fix stop command
 */

#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/mmc/card.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/module.h>

#include "smscoreapi.h"
#include "sms-cards.h"

/* Registers */

#define SMSSDIO_DATA		0x00
#define SMSSDIO_INT		0x04
#define SMSSDIO_BLOCK_SIZE	128

static const struct sdio_device_id smssdio_ids[] = {
	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR),
	 .driver_data = SMS1XXX_BOARD_SIANO_STELLAR},
	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0),
	 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_A},
	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0),
	 .driver_data = SMS1XXX_BOARD_SIANO_NOVA_B},
	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0),
	 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE),
	 .driver_data = SMS1XXX_BOARD_SIANO_VEGA},
	{ /* end: all zeroes */ },
};

MODULE_DEVICE_TABLE(sdio, smssdio_ids);

struct smssdio_device {
	struct sdio_func *func;

	struct smscore_device_t *coredev;

	struct smscore_buffer_t *split_cb;
};

/*******************************************************************/
/* Siano core callbacks                                            */
/*******************************************************************/

static int smssdio_sendrequest(void *context, void *buffer, size_t size)
{
	int ret = 0;
	struct smssdio_device *smsdev;

	smsdev = context;

	sdio_claim_host(smsdev->func);

	while (size >= smsdev->func->cur_blksize) {
		ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
					buffer, smsdev->func->cur_blksize);
		if (ret)
			goto out;

		buffer += smsdev->func->cur_blksize;
		size -= smsdev->func->cur_blksize;
	}

	if (size) {
		ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
					buffer, size);
	}

out:
	sdio_release_host(smsdev->func);

	return ret;
}

/*******************************************************************/
/* SDIO callbacks                                                  */
/*******************************************************************/

static void smssdio_interrupt(struct sdio_func *func)
{
	int ret;

	struct smssdio_device *smsdev;
	struct smscore_buffer_t *cb;
	struct SmsMsgHdr_ST *hdr;
	size_t size;

	smsdev = sdio_get_drvdata(func);

	/*
	 * The interrupt register has no defined meaning. It is just
	 * a way of turning of the level triggered interrupt.
	 */
	(void)sdio_readb(func, SMSSDIO_INT, &ret);
	if (ret) {
		sms_err("Unable to read interrupt register!\n");
		return;
	}

	if (smsdev->split_cb == NULL) {
		cb = smscore_getbuffer(smsdev->coredev);
		if (!cb) {
			sms_err("Unable to allocate data buffer!\n");
			return;
		}

		ret = sdio_memcpy_fromio(smsdev->func,
					 cb->p,
					 SMSSDIO_DATA,
					 SMSSDIO_BLOCK_SIZE);
		if (ret) {
			sms_err("Error %d reading initial block!\n", ret);
			return;
		}

		hdr = cb->p;

		if (hdr->msgFlags & MSG_HDR_FLAG_SPLIT_MSG) {
			smsdev->split_cb = cb;
			return;
		}

		if (hdr->msgLength > smsdev->func->cur_blksize)
			size = hdr->msgLength - smsdev->func->cur_blksize;
		else
			size = 0;
	} else {
		cb = smsdev->split_cb;
		hdr = cb->p;

		size = hdr->msgLength - sizeof(struct SmsMsgHdr_ST);

		smsdev->split_cb = NULL;
	}

	if (size) {
		void *buffer;

		buffer = cb->p + (hdr->msgLength - size);
		size = ALIGN(size, SMSSDIO_BLOCK_SIZE);

		BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE);

		/*
		 * First attempt to transfer all of it in one go...
		 */
		ret = sdio_memcpy_fromio(smsdev->func,
					 buffer,
					 SMSSDIO_DATA,
					 size);
		if (ret && ret != -EINVAL) {
			smscore_putbuffer(smsdev->coredev, cb);
			sms_err("Error %d reading data from card!\n", ret);
			return;
		}

		/*
		 * ..then fall back to one block at a time if that is
		 * not possible...
		 *
		 * (we have to do this manually because of the
		 * problem with the "increase address" bit)
		 */
		if (ret == -EINVAL) {
			while (size) {
				ret = sdio_memcpy_fromio(smsdev->func,
						  buffer, SMSSDIO_DATA,
						  smsdev->func->cur_blksize);
				if (ret) {
					smscore_putbuffer(smsdev->coredev, cb);
					sms_err("Error %d reading "
						"data from card!\n", ret);
					return;
				}

				buffer += smsdev->func->cur_blksize;
				if (size > smsdev->func->cur_blksize)
					size -= smsdev->func->cur_blksize;
				else
					size = 0;
			}
		}
	}

	cb->size = hdr->msgLength;
	cb->offset = 0;

	smscore_onresponse(smsdev->coredev, cb);
}

static int smssdio_probe(struct sdio_func *func,
			 const struct sdio_device_id *id)
{
	int ret;

	int board_id;
	struct smssdio_device *smsdev;
	struct smsdevice_params_t params;

	board_id = id->driver_data;

	smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL);
	if (!smsdev)
		return -ENOMEM;

	smsdev->func = func;

	memset(&params, 0, sizeof(struct smsdevice_params_t));

	params.device = &func->dev;
	params.buffer_size = 0x5000;	/* ?? */
	params.num_buffers = 22;	/* ?? */
	params.context = smsdev;

	snprintf(params.devpath, sizeof(params.devpath),
		 "sdio\\%s", sdio_func_id(func));

	params.sendrequest_handler = smssdio_sendrequest;

	params.device_type = sms_get_board(board_id)->type;

	if (params.device_type != SMS_STELLAR)
		params.flags |= SMS_DEVICE_FAMILY2;
	else {
		/*
		 * FIXME: Stellar needs special handling...
		 */
		ret = -ENODEV;
		goto free;
	}

	ret = smscore_register_device(&params, &smsdev->coredev);
	if (ret < 0)
		goto free;

	smscore_set_board_id(smsdev->coredev, board_id);

	sdio_claim_host(func);

	ret = sdio_enable_func(func);
	if (ret)
		goto release;

	ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE);
	if (ret)
		goto disable;

	ret = sdio_claim_irq(func, smssdio_interrupt);
	if (ret)
		goto disable;

	sdio_set_drvdata(func, smsdev);

	sdio_release_host(func);

	ret = smscore_start_device(smsdev->coredev);
	if (ret < 0)
		goto reclaim;

	return 0;

reclaim:
	sdio_claim_host(func);
	sdio_release_irq(func);
disable:
	sdio_disable_func(func);
release:
	sdio_release_host(func);
	smscore_unregister_device(smsdev->coredev);
free:
	kfree(smsdev);

	return ret;
}

static void smssdio_remove(struct sdio_func *func)
{
	struct smssdio_device *smsdev;

	smsdev = sdio_get_drvdata(func);

	/* FIXME: racy! */
	if (smsdev->split_cb)
		smscore_putbuffer(smsdev->coredev, smsdev->split_cb);

	smscore_unregister_device(smsdev->coredev);

	sdio_claim_host(func);
	sdio_release_irq(func);
	sdio_disable_func(func);
	sdio_release_host(func);

	kfree(smsdev);
}

static struct sdio_driver smssdio_driver = {
	.name = "smssdio",
	.id_table = smssdio_ids,
	.probe = smssdio_probe,
	.remove = smssdio_remove,
};

/*******************************************************************/
/* Module functions                                                */
/*******************************************************************/

static int __init smssdio_module_init(void)
{
	int ret = 0;

	printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n");
	printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n");

	ret = sdio_register_driver(&smssdio_driver);

	return ret;
}

static void __exit smssdio_module_exit(void)
{
	sdio_unregister_driver(&smssdio_driver);
}

module_init(smssdio_module_init);
module_exit(smssdio_module_exit);

MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver");
MODULE_AUTHOR("Pierre Ossman");
MODULE_LICENSE("GPL");
Commit	Line	Data
319afbf9 US	1	/*
	2	* smssdio.c - Siano 1xxx SDIO interface driver
	3	*
	4	* Copyright 2008 Pierre Ossman
	5	*
	6	* Based on code by Siano Mobile Silicon, Inc.,
	7	* Copyright (C) 2006-2008, Uri Shkolnik
	8	*
	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.
	13	*
	14	*
	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.
	18	*
	19	* Also, buffers from the card are always aligned to 128 byte
	20	* boundaries.
	21	*/
	22
	23	/*
	24	* General cleanup notes:
	25	*
	26	* - only typedefs should be name *_t
	27	*
	28	* - use ERR_PTR and friends for smscore_register_device()
	29	*
	30	* - smscore_getbuffer should zero fields
	31	*
	32	* Fix stop command
	33	*/
	34
	35	#include <linux/moduleparam.h>
5a0e3ad6	36	#include <linux/slab.h>
319afbf9 US	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>
7a707b89	42	#include <linux/module.h>
319afbf9 US	43
	44	#include "smscoreapi.h"
	45	#include "sms-cards.h"
	46
	47	/* Registers */
	48
	49	#define SMSSDIO_DATA 0x00
	50	#define SMSSDIO_INT 0x04
ef2d12ce	51	#define SMSSDIO_BLOCK_SIZE 128
319afbf9	52
4c62e976	53	static const struct sdio_device_id smssdio_ids[] = {
319afbf9 US	54	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR),
	55	.driver_data = SMS1XXX_BOARD_SIANO_STELLAR},
	56	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0),
	57	.driver_data = SMS1XXX_BOARD_SIANO_NOVA_A},
	58	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0),
	59	.driver_data = SMS1XXX_BOARD_SIANO_NOVA_B},
	60	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0),
	61	.driver_data = SMS1XXX_BOARD_SIANO_VEGA},
	62	{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE),
	63	.driver_data = SMS1XXX_BOARD_SIANO_VEGA},
	64	{ /* end: all zeroes */ },
	65	};
	66
	67	MODULE_DEVICE_TABLE(sdio, smssdio_ids);
	68
	69	struct smssdio_device {
	70	struct sdio_func *func;
	71
	72	struct smscore_device_t *coredev;
	73
	74	struct smscore_buffer_t *split_cb;
	75	};
	76
	77	/*******************************************************************/
	78	/* Siano core callbacks */
	79	/*******************************************************************/
	80
	81	static int smssdio_sendrequest(void context, void buffer, size_t size)
	82	{
f58d7856	83	int ret = 0;
319afbf9 US	84	struct smssdio_device *smsdev;
	85
	86	smsdev = context;
	87
	88	sdio_claim_host(smsdev->func);
	89
	90	while (size >= smsdev->func->cur_blksize) {
ef2d12ce UA	91	ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
ef2d12ce UA	92	buffer, smsdev->func->cur_blksize);
319afbf9 US	93	if (ret)
	94	goto out;
	95
	96	buffer += smsdev->func->cur_blksize;
	97	size -= smsdev->func->cur_blksize;
	98	}
	99
	100	if (size) {
ef2d12ce UA	101	ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
ef2d12ce UA	102	buffer, size);
319afbf9 US	103	}
	104
	105	out:
	106	sdio_release_host(smsdev->func);
	107
	108	return ret;
	109	}
	110
	111	/*******************************************************************/
	112	/* SDIO callbacks */
	113	/*******************************************************************/
	114
	115	static void smssdio_interrupt(struct sdio_func *func)
	116	{
fdf07b02	117	int ret;
319afbf9 US	118
	119	struct smssdio_device *smsdev;
	120	struct smscore_buffer_t *cb;
	121	struct SmsMsgHdr_ST *hdr;
	122	size_t size;
	123
	124	smsdev = sdio_get_drvdata(func);
	125
	126	/*
	127	* The interrupt register has no defined meaning. It is just
	128	* a way of turning of the level triggered interrupt.
	129	*/
fdf07b02	130	(void)sdio_readb(func, SMSSDIO_INT, &ret);
319afbf9	131	if (ret) {
ef2d12ce	132	sms_err("Unable to read interrupt register!\n");
319afbf9 US	133	return;
	134	}
	135
	136	if (smsdev->split_cb == NULL) {
	137	cb = smscore_getbuffer(smsdev->coredev);
	138	if (!cb) {
ef2d12ce	139	sms_err("Unable to allocate data buffer!\n");
319afbf9 US	140	return;
	141	}
	142
ef2d12ce UA	143	ret = sdio_memcpy_fromio(smsdev->func,
	144	cb->p,
	145	SMSSDIO_DATA,
	146	SMSSDIO_BLOCK_SIZE);
319afbf9	147	if (ret) {
ef2d12ce	148	sms_err("Error %d reading initial block!\n", ret);
319afbf9 US	149	return;
	150	}
	151
	152	hdr = cb->p;
	153
	154	if (hdr->msgFlags & MSG_HDR_FLAG_SPLIT_MSG) {
	155	smsdev->split_cb = cb;
	156	return;
	157	}
	158
ef2d12ce UA	159	if (hdr->msgLength > smsdev->func->cur_blksize)
	160	size = hdr->msgLength - smsdev->func->cur_blksize;
	161	else
	162	size = 0;
319afbf9 US	163	} else {
	164	cb = smsdev->split_cb;
	165	hdr = cb->p;
	166
	167	size = hdr->msgLength - sizeof(struct SmsMsgHdr_ST);
	168
	169	smsdev->split_cb = NULL;
	170	}
	171
ef2d12ce	172	if (size) {
319afbf9 US	173	void *buffer;
319afbf9 US	174
ef2d12ce UA	175	buffer = cb->p + (hdr->msgLength - size);
ef2d12ce UA	176	size = ALIGN(size, SMSSDIO_BLOCK_SIZE);
319afbf9	177
ef2d12ce	178	BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE);
319afbf9 US	179
	180	/*
	181	* First attempt to transfer all of it in one go...
	182	*/
ef2d12ce UA	183	ret = sdio_memcpy_fromio(smsdev->func,
	184	buffer,
	185	SMSSDIO_DATA,
	186	size);
319afbf9 US	187	if (ret && ret != -EINVAL) {
319afbf9 US	188	smscore_putbuffer(smsdev->coredev, cb);
ef2d12ce	189	sms_err("Error %d reading data from card!\n", ret);
319afbf9 US	190	return;
	191	}
	192
	193	/*
	194	* ..then fall back to one block at a time if that is
	195	* not possible...
	196	*
	197	* (we have to do this manually because of the
	198	* problem with the "increase address" bit)
	199	*/
	200	if (ret == -EINVAL) {
	201	while (size) {
ef2d12ce UA	202	ret = sdio_memcpy_fromio(smsdev->func,
	203	buffer, SMSSDIO_DATA,
	204	smsdev->func->cur_blksize);
319afbf9 US	205	if (ret) {
319afbf9 US	206	smscore_putbuffer(smsdev->coredev, cb);
ef2d12ce	207	sms_err("Error %d reading "
319afbf9 US	208	"data from card!\n", ret);
	209	return;
	210	}
	211
	212	buffer += smsdev->func->cur_blksize;
	213	if (size > smsdev->func->cur_blksize)
	214	size -= smsdev->func->cur_blksize;
	215	else
	216	size = 0;
	217	}
	218	}
	219	}
	220
	221	cb->size = hdr->msgLength;
	222	cb->offset = 0;
	223
	224	smscore_onresponse(smsdev->coredev, cb);
	225	}
	226
4c62e976	227	static int smssdio_probe(struct sdio_func *func,
319afbf9 US	228	const struct sdio_device_id *id)
	229	{
	230	int ret;
	231
	232	int board_id;
	233	struct smssdio_device *smsdev;
	234	struct smsdevice_params_t params;
	235
	236	board_id = id->driver_data;
	237
	238	smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL);
	239	if (!smsdev)
	240	return -ENOMEM;
	241
	242	smsdev->func = func;
	243
	244	memset(&params, 0, sizeof(struct smsdevice_params_t));
	245
	246	params.device = &func->dev;
	247	params.buffer_size = 0x5000; /* ?? */
	248	params.num_buffers = 22; /* ?? */
	249	params.context = smsdev;
	250
	251	snprintf(params.devpath, sizeof(params.devpath),
	252	"sdio\\%s", sdio_func_id(func));
	253
	254	params.sendrequest_handler = smssdio_sendrequest;
	255
	256	params.device_type = sms_get_board(board_id)->type;
	257
	258	if (params.device_type != SMS_STELLAR)
	259	params.flags \|= SMS_DEVICE_FAMILY2;
	260	else {
	261	/*
	262	* FIXME: Stellar needs special handling...
	263	*/
	264	ret = -ENODEV;
	265	goto free;
	266	}
	267
	268	ret = smscore_register_device(&params, &smsdev->coredev);
	269	if (ret < 0)
	270	goto free;
	271
	272	smscore_set_board_id(smsdev->coredev, board_id);
	273
	274	sdio_claim_host(func);
	275
	276	ret = sdio_enable_func(func);
	277	if (ret)
	278	goto release;
	279
ef2d12ce	280	ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE);
319afbf9 US	281	if (ret)
	282	goto disable;
	283
	284	ret = sdio_claim_irq(func, smssdio_interrupt);
	285	if (ret)
	286	goto disable;
	287
	288	sdio_set_drvdata(func, smsdev);
	289
	290	sdio_release_host(func);
	291
	292	ret = smscore_start_device(smsdev->coredev);
	293	if (ret < 0)
	294	goto reclaim;
	295
	296	return 0;
	297
	298	reclaim:
	299	sdio_claim_host(func);
	300	sdio_release_irq(func);
	301	disable:
	302	sdio_disable_func(func);
	303	release:
	304	sdio_release_host(func);
	305	smscore_unregister_device(smsdev->coredev);
	306	free:
	307	kfree(smsdev);
	308
	309	return ret;
	310	}
	311
	312	static void smssdio_remove(struct sdio_func *func)
	313	{
	314	struct smssdio_device *smsdev;
	315
	316	smsdev = sdio_get_drvdata(func);
	317
	318	/* FIXME: racy! */
	319	if (smsdev->split_cb)
	320	smscore_putbuffer(smsdev->coredev, smsdev->split_cb);
	321
	322	smscore_unregister_device(smsdev->coredev);
	323
	324	sdio_claim_host(func);
	325	sdio_release_irq(func);
	326	sdio_disable_func(func);
	327	sdio_release_host(func);
	328
	329	kfree(smsdev);
	330	}
	331
	332	static struct sdio_driver smssdio_driver = {
	333	.name = "smssdio",
	334	.id_table = smssdio_ids,
	335	.probe = smssdio_probe,
	336	.remove = smssdio_remove,
	337	};
	338
	339	/*******************************************************************/
	340	/* Module functions */
	341	/*******************************************************************/
	342
2184dda0	343	static int __init smssdio_module_init(void)
319afbf9 US	344	{
	345	int ret = 0;
	346
	347	printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n");
	348	printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n");
	349
	350	ret = sdio_register_driver(&smssdio_driver);
	351
	352	return ret;
	353	}
	354
2184dda0	355	static void __exit smssdio_module_exit(void)
319afbf9 US	356	{
	357	sdio_unregister_driver(&smssdio_driver);
	358	}
	359
db9582a1 US	360	module_init(smssdio_module_init);
	361	module_exit(smssdio_module_exit);
	362
319afbf9 US	363	MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver");
	364	MODULE_AUTHOR("Pierre Ossman");
	365	MODULE_LICENSE("GPL");