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linux/drivers/media/mmc/siano/smssdio.c
Mauro Carvalho Chehab 4b208f8b56 [media] siano: register media controller earlier 
We need to initialize the media controller earlier, as the core
will call the smsdvb hotplug during register time. Ok, this is
an async operation, so, when the module is not loaded, the media
controller works.

However, if the module is already loaded, nothing will be
registered at the media controller, as it will load too late.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-02-26 09:10:39 -03:00

380 lines
8.7 KiB
C
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/*
* 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 "smscoreapi.h"
#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 "sms-cards.h"
#include "smsendian.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},
{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x302),
.driver_data = SMS1XXX_BOARD_SIANO_MING},
{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x500),
.driver_data = SMS1XXX_BOARD_SIANO_PELE},
{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x600),
.driver_data = SMS1XXX_BOARD_SIANO_RIO},
{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x700),
.driver_data = SMS1XXX_BOARD_SIANO_DENVER_2160},
{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x800),
.driver_data = SMS1XXX_BOARD_SIANO_DENVER_1530},
{ /* 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);
smsendian_handle_tx_message((struct sms_msg_data *) buffer);
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 sms_msg_hdr *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) {
pr_err("Unable to read interrupt register!\n");
return;
}
if (smsdev->split_cb == NULL) {
cb = smscore_getbuffer(smsdev->coredev);
if (!cb) {
pr_err("Unable to allocate data buffer!\n");
return;
}
ret = sdio_memcpy_fromio(smsdev->func,
cb->p,
SMSSDIO_DATA,
SMSSDIO_BLOCK_SIZE);
if (ret) {
pr_err("Error %d reading initial block!\n", ret);
return;
}
hdr = cb->p;
if (hdr->msg_flags & MSG_HDR_FLAG_SPLIT_MSG) {
smsdev->split_cb = cb;
return;
}
if (hdr->msg_length > smsdev->func->cur_blksize)
size = hdr->msg_length - smsdev->func->cur_blksize;
else
size = 0;
} else {
cb = smsdev->split_cb;
hdr = cb->p;
size = hdr->msg_length - sizeof(struct sms_msg_hdr);
smsdev->split_cb = NULL;
}
if (size) {
void *buffer;
buffer = cb->p + (hdr->msg_length - 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);
pr_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);
pr_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->msg_length;
cb->offset = 0;
smsendian_handle_rx_message((struct sms_msg_data *) cb->p);
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, NULL);
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");
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