Date:	Tue,  3 Nov 2009 01:36:30 +0200
From:	Tomas Winkler <tomas.winkler@...el.com>
To:	davem@...emloft.net, marcel@...tmann.org, netdev@...r.kernel.org,
	linux-bluetooth@...r.kernel.org, linux-mmc@...r.kernel.org
Cc:	guy.cohen@...el.com, ron.rindjunsky@...el.com,
	Tomas Winkler <tomas.winkler@...el.com>
Subject: [PATCH net-next] iwmc3200bt: Add iwmc3200 bluetooth driver

Add Intel Wireless MultiCom 3200 SDIO BT driver
IWMC3200 is 4Wireless Com CHIP (GPS/BT/WiFi/WiMAX).
wmc3200bt is derived from btsdio driver

Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
 drivers/bluetooth/Kconfig      |   16 ++
 drivers/bluetooth/Makefile     |    2 +
 drivers/bluetooth/iwmc3200bt.c |  553 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 571 insertions(+), 0 deletions(-)
 create mode 100644 drivers/bluetooth/iwmc3200bt.c

diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 652367a..e520889 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -195,5 +195,21 @@ config BT_MRVL_SDIO
 	  Say Y here to compile support for Marvell BT-over-SDIO driver
 	  into the kernel or say M to compile it as module.
 
+config BT_IWMC3200
+        tristate "Intel Wireless MultiCom 3200 SDIO BT driver"
+        depends on IWMC3200TOP && EXPERIMENTAL
+        help
+          Intel Wireless MultiCom 3200 SDIO Bluetooth driver
+
+	  Say Y here to compile support for IWMC3200 SDIO BT driver
+	  into the kernel or say M to compile it as module.
+
+config BT_IWMC3200_DEBUG
+        bool "Enable verbose debugging for iwmc3200bt"
+        depends on BT_IWMC3200
+        help
+	  Say Y here to enable IWMC3200 SDIO BT driver
+	  verbose debugging
+
 endmenu
 
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index b3f57d2..975036e 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -21,6 +21,8 @@ obj-$(CONFIG_BT_MRVL_SDIO)	+= btmrvl_sdio.o
 btmrvl-y			:= btmrvl_main.o
 btmrvl-$(CONFIG_DEBUG_FS)	+= btmrvl_debugfs.o
 
+obj-$(CONFIG_BT_IWMC3200)	+= iwmc3200bt.o
+
 hci_uart-y				:= hci_ldisc.o
 hci_uart-$(CONFIG_BT_HCIUART_H4)	+= hci_h4.o
 hci_uart-$(CONFIG_BT_HCIUART_BCSP)	+= hci_bcsp.o
diff --git a/drivers/bluetooth/iwmc3200bt.c b/drivers/bluetooth/iwmc3200bt.c
new file mode 100644
index 0000000..5aed7a3
--- /dev/null
+++ b/drivers/bluetooth/iwmc3200bt.c
@@ -0,0 +1,553 @@
+/*
+ *  ibtsdio - Intel Wireless MultiCom 3200 Bluetooth SDIO Driver
+ *  drivers/bluetooth/ibtsdio.c
+ *
+ *  Copyright (C) 2009 Intel Corporation. All rights reserved.
+ *
+ *  Based on  drivers/bluetooth/btsdio.c
+ *  Copyright (C) 2007  Cambridge Silicon Radio Ltd.
+ *  Copyright (C) 2007  Marcel Holtmann <marcel@...tmann.org>
+ *
+ *
+ *  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 program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+
+#include <linux/mmc/sdio_ids.h>
+#include <linux/mmc/sdio_func.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+
+#ifdef CONFIG_BT_IWMC3200_DEBUG
+#define IBT_DBG(func, fmt, arg...) \
+	dev_dbg(&((func)->dev), "%s: " fmt "\n" , __func__ , ## arg)
+#define IBT_ERR(func, fmt, arg...) \
+	dev_err(&((func)->dev), "%s: " fmt "\n" , __func__ , ## arg)
+#define IBT_DUMP(func, buf, size) do {					\
+	char prefix_str[30 + 1];					\
+	scnprintf(prefix_str, 30, "%s %s",				\
+		dev_driver_string(&((func)->dev)),			\
+		dev_name(&((func)->dev)));				\
+	print_hex_dump(KERN_DEBUG, prefix_str, DUMP_PREFIX_OFFSET,	\
+			16, 1, buf, size, false);			\
+} while (0)
+
+#define VD "-d"
+#else
+#define IBT_DBG(func, fmt, arg...)
+#define IBT_ERR(func, fmt, arg...)
+#define IBT_DUMP(func, buf, size)
+#define VD
+#endif /* CONFIG_BT_IWMC3200_DEBUG */
+
+#ifdef REPOSITORY_LABEL
+#define RL REPOSITORY_LABEL
+#else
+#define RL local
+#endif
+
+
+#define IWMCBT_VERSION "0.1.6"
+
+#define DRIVER_VERSION IWMCBT_VERSION "-"  __stringify(RL) VD
+
+
+#define IWMC_BT_SDIO_DEVID (0x1406)
+
+static const struct sdio_device_id btsdio_table[] = {
+	/* IWMC3200BT (0x1406) */
+	{ SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1406)},
+	{ }	/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(sdio, btsdio_table);
+
+struct btsdio_data {
+	struct hci_dev   *hdev;
+	struct sdio_func *func;
+
+	struct work_struct work;
+
+	struct sk_buff_head txq;
+	unsigned char tx_buf[2048];
+	unsigned char rx_buf[2048];
+};
+
+#define REG_RDAT     0x00	/* Receiver Data */
+#define REG_TDAT     0x00	/* Transmitter Data */
+#define REG_PC_RRT   0x10	/* Read Packet Control */
+#define REG_PC_WRT   0x11	/* Write Packet Control */
+#define REG_RTC_STAT 0x12	/* Retry Control Status */
+#define REG_RTC_SET  0x12	/* Retry Control Set */
+#define REG_INTRD    0x13	/* Interrupt Indication */
+#define REG_CL_INTRD 0x13	/* Interrupt Clear */
+#define REG_EN_INTRD 0x14	/* Interrupt Enable */
+#define REG_MD_STAT  0x20	/* Bluetooth Mode Status */
+#define REG_H2D_COUNT_L  0x2C
+#define REG_H2D_COUNT_H  0x2D
+
+#ifdef CONFIG_BT_IWMC3200_DEBUG
+static char *type_names[] = {
+	"Illegal",
+	"HCI_COMMAND_PKT",
+	"HCI_ACLDATA_PKT",
+	"HCI_SCODATA_PKT",
+	"HCI_EVENT_PKT"
+};
+#endif /* CONFIG_BT_IWMC3200_DEBUG  */
+
+
+static int btsdio_tx_packet(struct btsdio_data *data, struct sk_buff *skb)
+{
+	int err;
+	int hdr_sz = 7, pkt_sz = 0;
+
+	IBT_DBG(data->func, "%s", data->hdev->name);
+	memset(data->tx_buf, 0, 2048);
+
+	/* Prepend Type-A header */
+	skb_push(skb, 4);
+	skb->data[0] = (skb->len & 0x0000ff);
+	skb->data[1] = (skb->len & 0x00ff00) >> 8;
+	skb->data[2] = (skb->len & 0xff0000) >> 16;
+	skb->data[3] = bt_cb(skb)->pkt_type;
+
+	hdr_sz = 4 + 3; /* (4) btsdio header  + (3) hci cmd hdr */
+	memcpy(data->tx_buf, skb->data, hdr_sz);
+
+	IBT_DBG(data->func, "requested to send packet of type %s\n",
+		type_names[data->tx_buf[3]]);
+	if (bt_cb(skb)->pkt_type == HCI_ACLDATA_PKT) {
+		data->tx_buf[7] = skb->data[7];
+		hdr_sz++;
+	}
+	memcpy(data->tx_buf + 8, skb->data + hdr_sz, skb->len - hdr_sz);
+	pkt_sz = ALIGN(skb->len, 256);
+	IBT_DBG(data->func, "padded size to send %d bytes\n", pkt_sz);
+	IBT_DUMP(data->func, data->tx_buf, pkt_sz);
+
+	err = sdio_writesb(data->func, REG_TDAT, data->tx_buf, pkt_sz);
+	if (err < 0) {
+		IBT_ERR(data->func, "sdio_writesb exited with error %d\n", err);
+		skb_pull(skb, 4);
+		sdio_writeb(data->func, 0x01, REG_PC_WRT, NULL);
+		return err;
+	}
+	IBT_DBG(data->func, "sdio_writesb exited with success %d\n", err);
+	data->hdev->stat.byte_tx += skb->len;
+	kfree_skb(skb);
+
+	return 0;
+}
+
+static void btsdio_work(struct work_struct *work)
+{
+	struct btsdio_data *data = container_of(work, struct btsdio_data, work);
+	struct sk_buff *skb;
+	int err;
+
+	IBT_DBG(data->func, "%s", data->hdev->name);
+
+	sdio_claim_host(data->func);
+
+	while ((skb = skb_dequeue(&data->txq))) {
+		err = btsdio_tx_packet(data, skb);
+		if (err < 0) {
+			data->hdev->stat.err_tx++;
+			skb_queue_head(&data->txq, skb);
+			break;
+		}
+	}
+
+	sdio_release_host(data->func);
+}
+
+static int btsdio_rx_packet(struct btsdio_data *data, int padded_len)
+{
+	struct sk_buff *skb;
+	int err, len, hdr_sz;
+
+	IBT_DBG(data->func, "%s", data->hdev->name);
+
+	memset(data->rx_buf, 0, 2048);
+	err = sdio_readsb(data->func, data->rx_buf,
+			  REG_RDAT, padded_len);
+	if (err < 0) {
+		IBT_ERR(data->func, "%s with error %d\n", __func__, err);
+		return err;
+	}
+	IBT_DUMP(data->func, data->rx_buf, padded_len);
+
+	len = data->rx_buf[0] | (data->rx_buf[1] << 8) | (data->rx_buf[2] << 16);
+	len -= 4;
+	skb = bt_skb_alloc(len, GFP_KERNEL);
+	/* Out of memory. Prepare a read retry and just
+	 * return with the expectation that the next time
+	 * we're called we'll have more memory. */
+	if (!skb)
+		return -ENOMEM;
+
+	if (data->rx_buf[3] == HCI_EVENT_PKT)
+		hdr_sz = HCI_EVENT_HDR_SIZE;
+	else if (data->rx_buf[3] == HCI_SCODATA_PKT)
+		hdr_sz = HCI_SCO_HDR_SIZE;
+	else if (data->rx_buf[3] == HCI_ACLDATA_PKT)
+		hdr_sz = HCI_ACL_HDR_SIZE;
+	else {
+		IBT_ERR(data->func, "Wrong packet type %d \n", data->rx_buf[3]);
+		kfree_skb(skb);
+		return -EINVAL;
+	}
+	IBT_DBG(data->func, "copying hci header of %d bytes\n", hdr_sz);
+	memcpy(skb_put(skb, hdr_sz), data->rx_buf + 4, hdr_sz);
+	IBT_DUMP(data->func, skb->data, skb->len);
+	len -= hdr_sz;
+	IBT_DBG(data->func, "copying payload of %d bytes\n", len);
+	memcpy(skb_put(skb, len), data->rx_buf + 4 + 4, len);
+	data->hdev->stat.byte_rx += len + hdr_sz;
+	IBT_DBG(data->func, "Data before hci_recv_frame\n");
+	IBT_DUMP(data->func, skb->data, skb->len);
+	skb->dev = (void *)data->hdev;
+	bt_cb(skb)->pkt_type = data->rx_buf[3];
+	err = hci_recv_frame(skb);
+	if (err < 0) {
+		IBT_ERR(data->func,
+			"hci_recv_frame exited with error %d\n", err);
+		return err;
+	}
+	IBT_DBG(data->func, "hci_recv_frame exited with success %d\n", err);
+	sdio_writeb(data->func, 0x00, REG_PC_RRT, NULL);
+	return 0;
+}
+
+static void btsdio_interrupt(struct sdio_func *func)
+{
+	struct btsdio_data *data = sdio_get_drvdata(func);
+	int intrd, err;
+	int padded_len = 0;
+	unsigned int val1, val2;
+
+	IBT_DBG(data->func, "%s", data->hdev->name);
+
+	intrd = sdio_readb(func, REG_INTRD, NULL);
+	if (intrd & 0x01) {
+		/* in IWMC_BT we need to read the transfer length
+		 * before interrupt clearing */
+		val1 = sdio_readb(data->func, REG_H2D_COUNT_L, &err);
+		IBT_DBG(data->func, "%s to read len1,"
+			" reg_addr=%x ret=%d val=%x\n",
+			err ? "Failed" : "Succeeded",
+			REG_H2D_COUNT_L, err, err ? 0xff : val1);
+		if (err == 0) {
+			val2 = sdio_readb(data->func, REG_H2D_COUNT_H, &err);
+			IBT_DBG(data->func, "%s to read len2,"
+				" reg_addr=%x ret=%d val=%x\n",
+				err ? "Failed" : "Succeeded",
+				REG_H2D_COUNT_H, err, err ? 0xff : val2);
+			if (err == 0)
+				padded_len  = val1 + (val2 << 8);
+		}
+
+		sdio_writeb(func, 0x01, REG_CL_INTRD, NULL);
+
+		if (err || btsdio_rx_packet(data, padded_len) < 0) {
+			data->hdev->stat.err_rx++;
+			sdio_writeb(data->func, 0x01, REG_PC_RRT, NULL);
+		}
+	}
+}
+
+static int btsdio_open(struct hci_dev *hdev)
+{
+	struct btsdio_data *data = hdev->driver_data;
+	int err;
+
+	IBT_DBG(data->func, "%s", hdev->name);
+
+	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
+		return 0;
+
+	sdio_claim_host(data->func);
+
+#if 0
+	err = sdio_enable_func(data->func);
+	if (err < 0) {
+		clear_bit(HCI_RUNNING, &hdev->flags);
+		goto release;
+	}
+#endif
+
+	err = sdio_claim_irq(data->func, btsdio_interrupt);
+	if (err < 0) {
+		sdio_disable_func(data->func);
+		clear_bit(HCI_RUNNING, &hdev->flags);
+		goto release;
+	}
+
+	if (data->func->class == SDIO_CLASS_BT_B)
+		sdio_writeb(data->func, 0x00, REG_MD_STAT, NULL);
+
+	sdio_writeb(data->func, 0x01, REG_EN_INTRD, NULL);
+
+release:
+	sdio_release_host(data->func);
+
+	return err;
+}
+
+static int btsdio_close(struct hci_dev *hdev)
+{
+	struct btsdio_data *data = hdev->driver_data;
+
+	IBT_DBG(data->func, "%s", hdev->name);
+
+	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+		return 0;
+
+	sdio_claim_host(data->func);
+
+	sdio_writeb(data->func, 0x00, REG_EN_INTRD, NULL);
+
+	sdio_release_irq(data->func);
+
+	sdio_release_host(data->func);
+
+	return 0;
+}
+
+static int btsdio_flush(struct hci_dev *hdev)
+{
+	struct btsdio_data *data = hdev->driver_data;
+
+	IBT_DBG(data->func, "%s", hdev->name);
+
+	skb_queue_purge(&data->txq);
+
+	return 0;
+}
+
+static int btsdio_send_frame(struct sk_buff *skb)
+{
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+	struct btsdio_data *data = hdev->driver_data;
+
+	IBT_DBG(data->func, "%s", hdev->name);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return -EBUSY;
+
+	switch (bt_cb(skb)->pkt_type) {
+	case HCI_COMMAND_PKT:
+		hdev->stat.cmd_tx++;
+		break;
+
+	case HCI_ACLDATA_PKT:
+		hdev->stat.acl_tx++;
+		break;
+
+	case HCI_SCODATA_PKT:
+		hdev->stat.sco_tx++;
+		break;
+
+	default:
+		return -EILSEQ;
+	}
+
+	skb_queue_tail(&data->txq, skb);
+
+	schedule_work(&data->work);
+
+	return 0;
+}
+
+static void btsdio_destruct(struct hci_dev *hdev)
+{
+	struct btsdio_data *data = hdev->driver_data;
+
+	IBT_DBG(data->func, "%s", hdev->name);
+
+	kfree(data);
+}
+
+static int btsdio_probe(struct sdio_func *func,
+			const struct sdio_device_id *id)
+{
+	struct btsdio_data *data;
+	struct hci_dev *hdev;
+	struct sdio_func_tuple *tuple = func->tuples;
+	int err;
+
+	IBT_DBG(func, "id %p class 0x%04x", id, func->class);
+
+	while (tuple) {
+		IBT_DBG(func, "code 0x%x size %d",
+			tuple->code, tuple->size);
+		tuple = tuple->next;
+	}
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->func = func;
+
+
+	sdio_claim_host(data->func);
+	/* FIXME: Remove after it is fixed in the Boot ROM upgrade */
+	func->enable_timeout = 10;
+	err = sdio_enable_func(data->func);
+	sdio_release_host(data->func);
+	if (err < 0) {
+		kfree(data);
+		return -ENODEV;
+	}
+
+
+	INIT_WORK(&data->work, btsdio_work);
+
+	skb_queue_head_init(&data->txq);
+
+	hdev = hci_alloc_dev();
+	if (!hdev) {
+		kfree(data);
+		return -ENOMEM;
+	}
+
+	hdev->type = HCI_SDIO;
+	hdev->driver_data = data;
+
+	data->hdev = hdev;
+
+	SET_HCIDEV_DEV(hdev, &func->dev);
+
+	hdev->open     = btsdio_open;
+	hdev->close    = btsdio_close;
+	hdev->flush    = btsdio_flush;
+	hdev->send     = btsdio_send_frame;
+	hdev->destruct = btsdio_destruct;
+
+	hdev->owner = THIS_MODULE;
+
+	err = hci_register_dev(hdev);
+	if (err < 0) {
+		hci_free_dev(hdev);
+		kfree(data);
+		return err;
+	}
+
+	sdio_set_drvdata(func, data);
+
+	return 0;
+}
+
+static void btsdio_remove(struct sdio_func *func)
+{
+	struct btsdio_data *data = sdio_get_drvdata(func);
+	struct hci_dev *hdev;
+
+	IBT_DBG(data->func, "remove");
+
+	if (!data)
+		return;
+
+	hdev = data->hdev;
+
+	sdio_set_drvdata(func, NULL);
+
+	sdio_claim_host(func);
+
+	sdio_disable_func(func);
+
+	sdio_release_host(func);
+
+	hci_unregister_dev(hdev);
+
+	hci_free_dev(hdev);
+}
+
+/* Note that the macro CONFIG_BTSDIO_PM is deliberately not defined in the
+ * config file. In order to use it, the macro should be defined or changed to
+ * CONFIG_PM.
+ */
+#ifdef CONFIG_BTSDIO_PM
+static int btsdio_suspend(struct sdio_func *func, pm_message_t msg)
+{
+	struct btsdio_data *data = sdio_get_drvdata(func);
+
+	IBT_DBG(data->func, "suspend");
+
+	if (!data)
+		return -EINVAL;
+
+	btsdio_close(data->hdev);
+	return 0;
+}
+
+static int btsdio_resume(struct sdio_func *func)
+{
+	struct btsdio_data *data = sdio_get_drvdata(func);
+
+	IBT_DBG(data->func, "resume");
+
+	if (!data)
+		return -EINVAL;
+
+	btsdio_open(data->hdev);
+	return 0;
+}
+#endif /* CONFIG_BTSDIO_PM */
+
+static struct sdio_driver btsdio_driver = {
+	.name		= "ibtsdio",
+	.probe		= btsdio_probe,
+	.remove		= btsdio_remove,
+	.id_table	= btsdio_table,
+#ifdef CONFIG_BTSDIO_PM
+	.suspend	= btsdio_suspend,
+	.resume		= btsdio_resume,
+#endif 	/* CONFIG_BTSDIO_PM */
+};
+
+static int __init btsdio_init(void)
+{
+	printk(KERN_INFO "IWMC Bluetooth SDIO driver ver %s", DRIVER_VERSION);
+
+	return sdio_register_driver(&btsdio_driver);
+}
+
+static void __exit btsdio_exit(void)
+{
+	sdio_unregister_driver(&btsdio_driver);
+}
+
+module_init(btsdio_init);
+module_exit(btsdio_exit);
+
+MODULE_AUTHOR("Gregory Paskar <gregory.paskar@...el.com>");
+MODULE_DESCRIPTION("IWMC Bluetooth SDIO driver ver " DRIVER_VERSION);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ibtsdio");
-- 
1.6.0.6

---------------------------------------------------------------------
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