[media] siano: break it into common, mmc and usb

siano is, in fact, 2 drivers: one for MMC and one for USB, plus
a common bus-independent code. Break it accordingly.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 365 insertions, 0 deletions

diff --git a/drivers/media/mmc/siano/smssdio.c b/drivers/media/mmc/siano/smssdio.c
new file mode 100644
index 00000000000..d6f3f100699
--- /dev/null
+++ b/drivers/media/mmc/siano/smssdio.c
@@ -0,0 +1,365 @@
+/*
+ *  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[] __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;
+
+	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 __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");