# HG changeset patch
# User Uri Shkolnik <uris@xxxxxxxxxxxx>
# Date 1236865697 -7200
# Node ID 7352ee1288f651d19d58c7bb479a98f070ad98e6
# Parent 3392722cc5b687586c4d898b73050ab6e59bf401
siano: add high level SDIO interface driver for SMS based cards
From: Uri Shkolnik <uris@xxxxxxxxxxxx>
This patch provides SDIO interface driver for
SMS (Siano Mobile Silicon) based devices.
The patch includes SMS high level SDIO driver and
requires patching the kernel SDIO stack,
those stack patches had been provided previously.
I would like to thank Pierre Ossman, MMC maintainer,
who wrote this driver.
Priority: normal
Signed-off-by: Pierre Ossman <drzeus@xxxxxxxxx>
Signed-off-by: Uri Shkolnik <uris@xxxxxxxxxxxx>
diff -r 3392722cc5b6 -r 7352ee1288f6 linux/drivers/media/dvb/siano/smssdio.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/linux/drivers/media/dvb/siano/smssdio.c Thu Mar 12 15:48:17 2009 +0200
@@ -0,0 +1,356 @@
+/*
+ * 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/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
+
+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;
+ struct smssdio_device *smsdev;
+
+ smsdev = context;
+
+ sdio_claim_host(smsdev->func);
+
+ while (size >= smsdev->func->cur_blksize) {
+ ret = sdio_write_blocks(smsdev->func, SMSSDIO_DATA, buffer, 1);
+ if (ret)
+ goto out;
+
+ buffer += smsdev->func->cur_blksize;
+ size -= smsdev->func->cur_blksize;
+ }
+
+ if (size) {
+ ret = sdio_write_bytes(smsdev->func, SMSSDIO_DATA,
+ buffer, size);
+ if (ret)
+ goto out;
+ }
+
+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) {
+ dev_err(&smsdev->func->dev,
+ "Unable to read interrupt register!\n");
+ return;
+ }
+
+ if (smsdev->split_cb == NULL) {
+ cb = smscore_getbuffer(smsdev->coredev);
+ if (!cb) {
+ dev_err(&smsdev->func->dev,
+ "Unable to allocate data buffer!\n");
+ return;
+ }
+
+ ret = sdio_read_blocks(smsdev->func, cb->p, SMSSDIO_DATA, 1);
+ if (ret) {
+ dev_err(&smsdev->func->dev,
+ "Error %d reading initial block!\n", ret);
+ return;
+ }
+
+ hdr = cb->p;
+
+ if (hdr->msgFlags & MSG_HDR_FLAG_SPLIT_MSG) {
+ smsdev->split_cb = cb;
+ return;
+ }
+
+ size = hdr->msgLength - smsdev->func->cur_blksize;
+ } else {
+ cb = smsdev->split_cb;
+ hdr = cb->p;
+
+ size = hdr->msgLength - sizeof(struct SmsMsgHdr_ST);
+
+ smsdev->split_cb = NULL;
+ }
+
+ if (hdr->msgLength > smsdev->func->cur_blksize) {
+ void *buffer;
+
+ size = ALIGN(size, 128);
+ buffer = cb->p + hdr->msgLength;
+
+ BUG_ON(smsdev->func->cur_blksize != 128);
+
+ /*
+ * First attempt to transfer all of it in one go...
+ */
+ ret = sdio_read_blocks(smsdev->func, buffer,
+ SMSSDIO_DATA, size / 128);
+ if (ret && ret != -EINVAL) {
+ smscore_putbuffer(smsdev->coredev, cb);
+ dev_err(&smsdev->func->dev,
+ "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_read_blocks(smsdev->func,
+ buffer, SMSSDIO_DATA, 1);
+ if (ret) {
+ smscore_putbuffer(smsdev->coredev, cb);
+ dev_err(&smsdev->func->dev,
+ "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(¶ms, 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(¶ms, &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, 128);
+ 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 */
+/*******************************************************************/
+
+int smssdio_register(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;
+}
+
+void smssdio_unregister(void)
+{
+ sdio_unregister_driver(&smssdio_driver);
+}
+
+MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver");
+MODULE_AUTHOR("Pierre Ossman");
+MODULE_LICENSE("GPL");
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