1 files changed, 357 insertions, 0 deletions

diff --git a/drivers/media/dvb/siano/smssdio.c b/drivers/media/dvb/siano/smssdio.c
new file mode 100644
index 000000000000..dfaa49a53f32
--- /dev/null
+++ b/drivers/media/dvb/siano/smssdio.c
@@ -0,0 +1,357 @@
+/*
+ *  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);
+        }
+
+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(&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, 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_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;
+}
+
+void 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");