[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / dvb / 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 "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[] __devinitconst = {
	{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, isr;

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