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, 115 insertions, 0 deletions

diff --git a/drivers/staging/rtl8723bs/hal/hal_sdio.c b/drivers/staging/rtl8723bs/hal/hal_sdio.c
new file mode 100644
index 000000000000..e147c69e7222
--- /dev/null
+++ b/drivers/staging/rtl8723bs/hal/hal_sdio.c
@@ -0,0 +1,115 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2011 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 _HAL_SDIO_C_
+
+#include <drv_types.h>
+#include <rtw_debug.h>
+#include <hal_data.h>
+
+u8 rtw_hal_sdio_max_txoqt_free_space(struct adapter *padapter)
+{
+	struct hal_com_data	*pHalData = GET_HAL_DATA(padapter);
+
+	if (pHalData->SdioTxOQTMaxFreeSpace < 8)
+		pHalData->SdioTxOQTMaxFreeSpace = 8;
+
+	return pHalData->SdioTxOQTMaxFreeSpace;
+}
+
+u8 rtw_hal_sdio_query_tx_freepage(
+	struct adapter *padapter, u8 PageIdx, u8 RequiredPageNum
+)
+{
+	struct hal_com_data	*pHalData = GET_HAL_DATA(padapter);
+
+	if ((pHalData->SdioTxFIFOFreePage[PageIdx]+pHalData->SdioTxFIFOFreePage[PUBLIC_QUEUE_IDX]) >= (RequiredPageNum))
+		return true;
+	else
+		return false;
+}
+
+void rtw_hal_sdio_update_tx_freepage(
+	struct adapter *padapter, u8 PageIdx, u8 RequiredPageNum
+)
+{
+	struct hal_com_data	*pHalData = GET_HAL_DATA(padapter);
+	u8 DedicatedPgNum = 0;
+	u8 RequiredPublicFreePgNum = 0;
+	/* _irqL irql; */
+
+	/* spin_lock_bh(&pHalData->SdioTxFIFOFreePageLock); */
+
+	DedicatedPgNum = pHalData->SdioTxFIFOFreePage[PageIdx];
+	if (RequiredPageNum <= DedicatedPgNum) {
+		pHalData->SdioTxFIFOFreePage[PageIdx] -= RequiredPageNum;
+	} else {
+		pHalData->SdioTxFIFOFreePage[PageIdx] = 0;
+		RequiredPublicFreePgNum = RequiredPageNum - DedicatedPgNum;
+		pHalData->SdioTxFIFOFreePage[PUBLIC_QUEUE_IDX] -= RequiredPublicFreePgNum;
+	}
+
+	/* spin_unlock_bh(&pHalData->SdioTxFIFOFreePageLock); */
+}
+
+void rtw_hal_set_sdio_tx_max_length(
+	struct adapter *padapter, u8 numHQ, u8 numNQ, u8 numLQ, u8 numPubQ
+)
+{
+	struct hal_com_data	*pHalData = GET_HAL_DATA(padapter);
+	u32 page_size;
+	u32 lenHQ, lenNQ, lenLQ;
+
+	rtw_hal_get_def_var(padapter, HAL_DEF_TX_PAGE_SIZE, &page_size);
+
+	lenHQ = ((numHQ + numPubQ) >> 1) * page_size;
+	lenNQ = ((numNQ + numPubQ) >> 1) * page_size;
+	lenLQ = ((numLQ + numPubQ) >> 1) * page_size;
+
+	pHalData->sdio_tx_max_len[HI_QUEUE_IDX] =
+		(lenHQ > MAX_XMITBUF_SZ) ? MAX_XMITBUF_SZ : lenHQ;
+	pHalData->sdio_tx_max_len[MID_QUEUE_IDX] =
+		(lenNQ > MAX_XMITBUF_SZ) ? MAX_XMITBUF_SZ : lenNQ;
+	pHalData->sdio_tx_max_len[LOW_QUEUE_IDX] =
+		(lenLQ > MAX_XMITBUF_SZ) ? MAX_XMITBUF_SZ : lenLQ;
+}
+
+u32 rtw_hal_get_sdio_tx_max_length(struct adapter *padapter, u8 queue_idx)
+{
+	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
+	struct hal_com_data	*pHalData = GET_HAL_DATA(padapter);
+	u32 deviceId, max_len;
+
+
+	deviceId = ffaddr2deviceId(pdvobjpriv, queue_idx);
+	switch (deviceId) {
+	case WLAN_TX_HIQ_DEVICE_ID:
+		max_len = pHalData->sdio_tx_max_len[HI_QUEUE_IDX];
+		break;
+
+	case WLAN_TX_MIQ_DEVICE_ID:
+		max_len = pHalData->sdio_tx_max_len[MID_QUEUE_IDX];
+		break;
+
+	case WLAN_TX_LOQ_DEVICE_ID:
+		max_len = pHalData->sdio_tx_max_len[LOW_QUEUE_IDX];
+		break;
+
+	default:
+		max_len = pHalData->sdio_tx_max_len[MID_QUEUE_IDX];
+		break;
+	}
+
+	return max_len;
+}