This patch provides SDIO interface driver for SMS chip-set based devices.
The patch includes SMS high level SDIO driver and requires patching the kernel SDIO stack.
I would like to thank Pierre Ossman, MMC maintainer, who wrote this driver.
Signed-off-by: Pierre Ossman <drzeus@xxxxxxxxx>
Signed-off-by: Uri Shkolnik <uris@xxxxxxxxxxxx>
This patch provides SDIO interface driver for SMS chip-set based devices.
The patch includes SMS high level SDIO driver and requires patching the kernel SDIO stack.
I would like to thank Pierre Ossman, MMC maintainer, who wrote this driver.
Signed-off-by: Pierre Ossman <drzeus@xxxxxxxxx>
Signed-off-by: Uri Shkolnik <uris@xxxxxxxxxxxx>
diff -uNr v4l-dvb-c5f976cab011/linux/drivers/media/dvb/siano/smssdio.c v4l-dvb-c5f976cab011_0003/linux/drivers/media/dvb/siano/smssdio.c
--- v4l-dvb-c5f976cab011/linux/drivers/media/dvb/siano/smssdio.c 1970-01-01 02:00:00.000000000 +0200
+++ v4l-dvb-c5f976cab011_0003/linux/drivers/media/dvb/siano/smssdio.c 2008-11-18 17:53:05.000000000 +0200
@@ -0,0 +1,354 @@
+/*
+ * 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},
+ { /* 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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