staging: Add rtl8723bs sdio wifi driver

The rtl8723bs is found on quite a few systems used by Linux users,
such as on Atom systems (Intel Computestick and various other
Atom based devices) and on many (budget) ARM boards such as
the CHIP.

The plan moving forward with this is for the new clean,
written from scratch, rtl8xxxu driver to eventually gain
support for sdio devices. But there is no clear timeline
for that, so lets add this driver included in staging for now.

Cc: Bastien Nocera <hadess@hadess.net>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Jes Sorensen <jes.sorensen@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 481 insertions, 0 deletions

diff --git a/drivers/staging/rtl8723bs/os_dep/osdep_service.c b/drivers/staging/rtl8723bs/os_dep/osdep_service.c
new file mode 100644
index 000000000000..02db59e8b593
--- /dev/null
+++ b/drivers/staging/rtl8723bs/os_dep/osdep_service.c
@@ -0,0 +1,481 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ ******************************************************************************/
+
+
+#define _OSDEP_SERVICE_C_
+
+#include <drv_types.h>
+#include <rtw_debug.h>
+
+/*
+* Translate the OS dependent @param error_code to OS independent RTW_STATUS_CODE
+* @return: one of RTW_STATUS_CODE
+*/
+inline int RTW_STATUS_CODE(int error_code)
+{
+	if (error_code >= 0)
+		return _SUCCESS;
+	return _FAIL;
+}
+
+u8 *_rtw_malloc(u32 sz)
+{
+	u8 *pbuf = NULL;
+
+	pbuf = kmalloc(sz, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+
+	return pbuf;
+}
+
+u8 *_rtw_zmalloc(u32 sz)
+{
+	u8 *pbuf = _rtw_malloc(sz);
+
+	if (pbuf != NULL) {
+		memset(pbuf, 0, sz);
+	}
+
+	return pbuf;
+}
+
+inline struct sk_buff *_rtw_skb_alloc(u32 sz)
+{
+	return __dev_alloc_skb(sz, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+}
+
+inline struct sk_buff *_rtw_skb_copy(const struct sk_buff *skb)
+{
+	return skb_copy(skb, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+}
+
+inline struct sk_buff *_rtw_skb_clone(struct sk_buff *skb)
+{
+	return skb_clone(skb, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+}
+
+inline int _rtw_netif_rx(_nic_hdl ndev, struct sk_buff *skb)
+{
+	skb->dev = ndev;
+	return netif_rx(skb);
+}
+
+void rtw_init_timer(_timer *ptimer, void *padapter, void *pfunc)
+{
+	struct adapter *adapter = (struct adapter *)padapter;
+
+	_init_timer(ptimer, adapter->pnetdev, pfunc, adapter);
+}
+
+void _rtw_init_queue(struct __queue *pqueue)
+{
+	INIT_LIST_HEAD(&(pqueue->queue));
+
+	spin_lock_init(&(pqueue->lock));
+}
+
+/*
+* Open a file with the specific @param path, @param flag, @param mode
+* @param fpp the pointer of struct file pointer to get struct file pointer while file opening is success
+* @param path the path of the file to open
+* @param flag file operation flags, please refer to linux document
+* @param mode please refer to linux document
+* @return Linux specific error code
+*/
+static int openFile(struct file **fpp, char *path, int flag, int mode)
+{
+	struct file *fp;
+
+	fp =filp_open(path, flag, mode);
+	if (IS_ERR(fp)) {
+		*fpp = NULL;
+		return PTR_ERR(fp);
+	}
+	else {
+		*fpp =fp;
+		return 0;
+	}
+}
+
+/*
+* Close the file with the specific @param fp
+* @param fp the pointer of struct file to close
+* @return always 0
+*/
+static int closeFile(struct file *fp)
+{
+	filp_close(fp, NULL);
+	return 0;
+}
+
+static int readFile(struct file *fp, char *buf, int len)
+{
+	int rlen = 0, sum = 0;
+
+	if (!fp->f_op || !fp->f_op->read)
+		return -EPERM;
+
+	while (sum<len) {
+		rlen =fp->f_op->read(fp, (char __force __user *)buf+sum, len-sum, &fp->f_pos);
+		if (rlen>0)
+			sum+=rlen;
+		else if (0 != rlen)
+			return rlen;
+		else
+			break;
+	}
+
+	return  sum;
+
+}
+
+/*
+* Test if the specifi @param path is a file and readable
+* @param path the path of the file to test
+* @return Linux specific error code
+*/
+static int isFileReadable(char *path)
+{
+	struct file *fp;
+	int ret = 0;
+	mm_segment_t oldfs;
+	char buf;
+
+	fp =filp_open(path, O_RDONLY, 0);
+	if (IS_ERR(fp)) {
+		ret = PTR_ERR(fp);
+	}
+	else {
+		oldfs = get_fs(); set_fs(get_ds());
+
+		if (1!=readFile(fp, &buf, 1))
+			ret = PTR_ERR(fp);
+
+		set_fs(oldfs);
+		filp_close(fp, NULL);
+	}
+	return ret;
+}
+
+/*
+* Open the file with @param path and retrive the file content into memory starting from @param buf for @param sz at most
+* @param path the path of the file to open and read
+* @param buf the starting address of the buffer to store file content
+* @param sz how many bytes to read at most
+* @return the byte we've read, or Linux specific error code
+*/
+static int retriveFromFile(char *path, u8 *buf, u32 sz)
+{
+	int ret =-1;
+	mm_segment_t oldfs;
+	struct file *fp;
+
+	if (path && buf) {
+		if (0 == (ret =openFile(&fp, path, O_RDONLY, 0))) {
+			DBG_871X("%s openFile path:%s fp =%p\n", __func__, path , fp);
+
+			oldfs = get_fs(); set_fs(get_ds());
+			ret =readFile(fp, buf, sz);
+			set_fs(oldfs);
+			closeFile(fp);
+
+			DBG_871X("%s readFile, ret:%d\n", __func__, ret);
+
+		} else {
+			DBG_871X("%s openFile path:%s Fail, ret:%d\n", __func__, path, ret);
+		}
+	} else {
+		DBG_871X("%s NULL pointer\n", __func__);
+		ret =  -EINVAL;
+	}
+	return ret;
+}
+
+/*
+* Test if the specifi @param path is a file and readable
+* @param path the path of the file to test
+* @return true or false
+*/
+int rtw_is_file_readable(char *path)
+{
+	if (isFileReadable(path) == 0)
+		return true;
+	else
+		return false;
+}
+
+/*
+* Open the file with @param path and retrive the file content into memory starting from @param buf for @param sz at most
+* @param path the path of the file to open and read
+* @param buf the starting address of the buffer to store file content
+* @param sz how many bytes to read at most
+* @return the byte we've read
+*/
+int rtw_retrive_from_file(char *path, u8 *buf, u32 sz)
+{
+	int ret =retriveFromFile(path, buf, sz);
+	return ret>= 0?ret:0;
+}
+
+struct net_device *rtw_alloc_etherdev_with_old_priv(int sizeof_priv, void *old_priv)
+{
+	struct net_device *pnetdev;
+	struct rtw_netdev_priv_indicator *pnpi;
+
+	pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4);
+	if (!pnetdev)
+		goto RETURN;
+
+	pnpi = netdev_priv(pnetdev);
+	pnpi->priv =old_priv;
+	pnpi->sizeof_priv =sizeof_priv;
+
+RETURN:
+	return pnetdev;
+}
+
+struct net_device *rtw_alloc_etherdev(int sizeof_priv)
+{
+	struct net_device *pnetdev;
+	struct rtw_netdev_priv_indicator *pnpi;
+
+	pnetdev = alloc_etherdev_mq(sizeof(struct rtw_netdev_priv_indicator), 4);
+	if (!pnetdev)
+		goto RETURN;
+
+	pnpi = netdev_priv(pnetdev);
+
+	pnpi->priv = vzalloc(sizeof_priv);
+	if (!pnpi->priv) {
+		free_netdev(pnetdev);
+		pnetdev = NULL;
+		goto RETURN;
+	}
+
+	pnpi->sizeof_priv =sizeof_priv;
+RETURN:
+	return pnetdev;
+}
+
+void rtw_free_netdev(struct net_device * netdev)
+{
+	struct rtw_netdev_priv_indicator *pnpi;
+
+	if (!netdev)
+		goto RETURN;
+
+	pnpi = netdev_priv(netdev);
+
+	if (!pnpi->priv)
+		goto RETURN;
+
+	vfree(pnpi->priv);
+	free_netdev(netdev);
+
+RETURN:
+	return;
+}
+
+int rtw_change_ifname(struct adapter *padapter, const char *ifname)
+{
+	struct net_device *pnetdev;
+	struct net_device *cur_pnetdev;
+	struct rereg_nd_name_data *rereg_priv;
+	int ret;
+
+	if (!padapter)
+		goto error;
+
+	cur_pnetdev = padapter->pnetdev;
+	rereg_priv = &padapter->rereg_nd_name_priv;
+
+	/* free the old_pnetdev */
+	if (rereg_priv->old_pnetdev) {
+		free_netdev(rereg_priv->old_pnetdev);
+		rereg_priv->old_pnetdev = NULL;
+	}
+
+	if (!rtnl_is_locked())
+		unregister_netdev(cur_pnetdev);
+	else
+		unregister_netdevice(cur_pnetdev);
+
+	rereg_priv->old_pnetdev =cur_pnetdev;
+
+	pnetdev = rtw_init_netdev(padapter);
+	if (!pnetdev)  {
+		ret = -1;
+		goto error;
+	}
+
+	SET_NETDEV_DEV(pnetdev, dvobj_to_dev(adapter_to_dvobj(padapter)));
+
+	rtw_init_netdev_name(pnetdev, ifname);
+
+	memcpy(pnetdev->dev_addr, padapter->eeprompriv.mac_addr, ETH_ALEN);
+
+	if (!rtnl_is_locked())
+		ret = register_netdev(pnetdev);
+	else
+		ret = register_netdevice(pnetdev);
+
+	if (ret != 0) {
+		RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("register_netdev() failed\n"));
+		goto error;
+	}
+
+	return 0;
+
+error:
+
+	return -1;
+
+}
+
+u64 rtw_modular64(u64 x, u64 y)
+{
+	return do_div(x, y);
+}
+
+void rtw_buf_free(u8 **buf, u32 *buf_len)
+{
+	u32 ori_len;
+
+	if (!buf || !buf_len)
+		return;
+
+	ori_len = *buf_len;
+
+	if (*buf) {
+		*buf_len = 0;
+		kfree(*buf);
+		*buf = NULL;
+	}
+}
+
+void rtw_buf_update(u8 **buf, u32 *buf_len, u8 *src, u32 src_len)
+{
+	u32 ori_len = 0, dup_len = 0;
+	u8 *ori = NULL;
+	u8 *dup = NULL;
+
+	if (!buf || !buf_len)
+		return;
+
+	if (!src || !src_len)
+		goto keep_ori;
+
+	/* duplicate src */
+	dup = rtw_malloc(src_len);
+	if (dup) {
+		dup_len = src_len;
+		memcpy(dup, src, dup_len);
+	}
+
+keep_ori:
+	ori = *buf;
+	ori_len = *buf_len;
+
+	/* replace buf with dup */
+	*buf_len = 0;
+	*buf = dup;
+	*buf_len = dup_len;
+
+	/* free ori */
+	if (ori && ori_len > 0)
+		kfree(ori);
+}
+
+
+/**
+ * rtw_cbuf_full - test if cbuf is full
+ * @cbuf: pointer of struct rtw_cbuf
+ *
+ * Returns: true if cbuf is full
+ */
+inline bool rtw_cbuf_full(struct rtw_cbuf *cbuf)
+{
+	return (cbuf->write == cbuf->read-1)? true : false;
+}
+
+/**
+ * rtw_cbuf_empty - test if cbuf is empty
+ * @cbuf: pointer of struct rtw_cbuf
+ *
+ * Returns: true if cbuf is empty
+ */
+inline bool rtw_cbuf_empty(struct rtw_cbuf *cbuf)
+{
+	return (cbuf->write == cbuf->read)? true : false;
+}
+
+/**
+ * rtw_cbuf_push - push a pointer into cbuf
+ * @cbuf: pointer of struct rtw_cbuf
+ * @buf: pointer to push in
+ *
+ * Lock free operation, be careful of the use scheme
+ * Returns: true push success
+ */
+bool rtw_cbuf_push(struct rtw_cbuf *cbuf, void *buf)
+{
+	if (rtw_cbuf_full(cbuf))
+		return _FAIL;
+
+	DBG_871X("%s on %u\n", __func__, cbuf->write);
+	cbuf->bufs[cbuf->write] = buf;
+	cbuf->write = (cbuf->write+1)%cbuf->size;
+
+	return _SUCCESS;
+}
+
+/**
+ * rtw_cbuf_pop - pop a pointer from cbuf
+ * @cbuf: pointer of struct rtw_cbuf
+ *
+ * Lock free operation, be careful of the use scheme
+ * Returns: pointer popped out
+ */
+void *rtw_cbuf_pop(struct rtw_cbuf *cbuf)
+{
+	void *buf;
+	if (rtw_cbuf_empty(cbuf))
+		return NULL;
+
+        DBG_871X("%s on %u\n", __func__, cbuf->read);
+	buf = cbuf->bufs[cbuf->read];
+	cbuf->read = (cbuf->read+1)%cbuf->size;
+
+	return buf;
+}
+
+/**
+ * rtw_cbuf_alloc - allocte a rtw_cbuf with given size and do initialization
+ * @size: size of pointer
+ *
+ * Returns: pointer of srtuct rtw_cbuf, NULL for allocation failure
+ */
+struct rtw_cbuf *rtw_cbuf_alloc(u32 size)
+{
+	struct rtw_cbuf *cbuf;
+
+	cbuf = (struct rtw_cbuf *)rtw_malloc(sizeof(*cbuf) + sizeof(void*)*size);
+
+	if (cbuf) {
+		cbuf->write = cbuf->read = 0;
+		cbuf->size = size;
+	}
+
+	return cbuf;
+}