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, 599 insertions, 0 deletions

diff --git a/drivers/staging/rtl8723bs/os_dep/sdio_ops_linux.c b/drivers/staging/rtl8723bs/os_dep/sdio_ops_linux.c
new file mode 100644
index 000000000000..33f0f83b002d
--- /dev/null
+++ b/drivers/staging/rtl8723bs/os_dep/sdio_ops_linux.c
@@ -0,0 +1,599 @@
+/******************************************************************************
+ *
+ * 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 _SDIO_OPS_LINUX_C_
+
+#include <drv_types.h>
+#include <rtw_debug.h>
+
+static bool rtw_sdio_claim_host_needed(struct sdio_func *func)
+{
+	struct dvobj_priv *dvobj = sdio_get_drvdata(func);
+	PSDIO_DATA sdio_data = &dvobj->intf_data;
+
+	if (sdio_data->sys_sdio_irq_thd && sdio_data->sys_sdio_irq_thd == current)
+		return false;
+	return true;
+}
+
+inline void rtw_sdio_set_irq_thd(struct dvobj_priv *dvobj, void *thd_hdl)
+{
+	PSDIO_DATA sdio_data = &dvobj->intf_data;
+
+	sdio_data->sys_sdio_irq_thd = thd_hdl;
+}
+
+u8 sd_f0_read8(struct intf_hdl *pintfhdl, u32 addr, s32 *err)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	u8 v = 0;
+	struct sdio_func *func;
+	bool claim_needed;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return v;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	v = sdio_f0_readb(func, addr, err);
+	if (claim_needed)
+		sdio_release_host(func);
+	if (err && *err)
+		DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x\n", __func__, *err, addr);
+	return v;
+}
+
+/*
+ * Return:
+ *0		Success
+ *others	Fail
+ */
+s32 _sd_cmd52_read(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	int err = 0, i;
+	struct sdio_func *func;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+
+	func = psdio->func;
+
+	for (i = 0; i < cnt; i++) {
+		pdata[i] = sdio_readb(func, addr+i, &err);
+		if (err) {
+			DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x\n", __func__, err, addr+i);
+			break;
+		}
+	}
+	return err;
+}
+
+/*
+ * Return:
+ *0		Success
+ *others	Fail
+ */
+s32 sd_cmd52_read(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	int err = 0;
+	struct sdio_func *func;
+	bool claim_needed;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	err = _sd_cmd52_read(pintfhdl, addr, cnt, pdata);
+	if (claim_needed)
+		sdio_release_host(func);
+	return err;
+}
+
+/*
+ * Return:
+ *0		Success
+ *others	Fail
+ */
+s32 _sd_cmd52_write(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	int err = 0, i;
+	struct sdio_func *func;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+
+	func = psdio->func;
+
+	for (i = 0; i < cnt; i++) {
+		sdio_writeb(func, pdata[i], addr+i, &err);
+		if (err) {
+			DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x val = 0x%02x\n", __func__, err, addr+i, pdata[i]);
+			break;
+		}
+	}
+	return err;
+}
+
+/*
+ * Return:
+ *0		Success
+ *others	Fail
+ */
+s32 sd_cmd52_write(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	int err = 0;
+	struct sdio_func *func;
+	bool claim_needed;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	err = _sd_cmd52_write(pintfhdl, addr, cnt, pdata);
+	if (claim_needed)
+		sdio_release_host(func);
+	return err;
+}
+
+u8 sd_read8(struct intf_hdl *pintfhdl, u32 addr, s32 *err)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	u8 v = 0;
+	struct sdio_func *func;
+	bool claim_needed;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return v;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	v = sdio_readb(func, addr, err);
+	if (claim_needed)
+		sdio_release_host(func);
+	if (err && *err)
+		DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x\n", __func__, *err, addr);
+	return v;
+}
+
+u32 sd_read32(struct intf_hdl *pintfhdl, u32 addr, s32 *err)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+	u32 v = 0;
+	struct sdio_func *func;
+	bool claim_needed;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return v;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	v = sdio_readl(func, addr, err);
+	if (claim_needed)
+		sdio_release_host(func);
+
+	if (err && *err)
+	{
+		int i;
+
+		DBG_871X(KERN_ERR "%s: (%d) addr = 0x%05x, val = 0x%x\n", __func__, *err, addr, v);
+
+		*err = 0;
+		for (i = 0; i<SD_IO_TRY_CNT; i++)
+		{
+			if (claim_needed) sdio_claim_host(func);
+			v = sdio_readl(func, addr, err);
+			if (claim_needed) sdio_release_host(func);
+
+			if (*err == 0) {
+				rtw_reset_continual_io_error(psdiodev);
+				break;
+			} else {
+				DBG_871X(KERN_ERR "%s: (%d) addr = 0x%05x, val = 0x%x, try_cnt =%d\n", __func__, *err, addr, v, i);
+				if ((-ESHUTDOWN == *err) || (-ENODEV == *err)) {
+					padapter->bSurpriseRemoved = true;
+				}
+
+				if (rtw_inc_and_chk_continual_io_error(psdiodev) == true) {
+					padapter->bSurpriseRemoved = true;
+					break;
+				}
+			}
+		}
+
+		if (i ==SD_IO_TRY_CNT)
+			DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x, val = 0x%x, try_cnt =%d\n", __func__, *err, addr, v, i);
+		else
+			DBG_871X(KERN_ERR "%s: (%d) addr = 0x%05x, val = 0x%x, try_cnt =%d\n", __func__, *err, addr, v, i);
+
+	}
+	return  v;
+}
+
+void sd_write8(struct intf_hdl *pintfhdl, u32 addr, u8 v, s32 *err)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+	struct sdio_func *func;
+	bool claim_needed;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return ;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	sdio_writeb(func, v, addr, err);
+	if (claim_needed)
+		sdio_release_host(func);
+	if (err && *err)
+		DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x val = 0x%02x\n", __func__, *err, addr, v);
+}
+
+void sd_write32(struct intf_hdl *pintfhdl, u32 addr, u32 v, s32 *err)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+	struct sdio_func *func;
+	bool claim_needed;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return ;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	sdio_writel(func, v, addr, err);
+	if (claim_needed)
+		sdio_release_host(func);
+
+	if (err && *err)
+	{
+		int i;
+
+		DBG_871X(KERN_ERR "%s: (%d) addr = 0x%05x val = 0x%08x\n", __func__, *err, addr, v);
+
+		*err = 0;
+		for (i = 0; i<SD_IO_TRY_CNT; i++)
+		{
+			if (claim_needed) sdio_claim_host(func);
+			sdio_writel(func, v, addr, err);
+			if (claim_needed) sdio_release_host(func);
+			if (*err == 0) {
+				rtw_reset_continual_io_error(psdiodev);
+				break;
+			} else {
+				DBG_871X(KERN_ERR "%s: (%d) addr = 0x%05x, val = 0x%x, try_cnt =%d\n", __func__, *err, addr, v, i);
+				if ((-ESHUTDOWN == *err) || (-ENODEV == *err)) {
+					padapter->bSurpriseRemoved = true;
+				}
+
+				if (rtw_inc_and_chk_continual_io_error(psdiodev) == true) {
+					padapter->bSurpriseRemoved = true;
+					break;
+				}
+			}
+		}
+
+		if (i ==SD_IO_TRY_CNT)
+			DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x val = 0x%08x, try_cnt =%d\n", __func__, *err, addr, v, i);
+		else
+			DBG_871X(KERN_ERR "%s: (%d) addr = 0x%05x val = 0x%08x, try_cnt =%d\n", __func__, *err, addr, v, i);
+	}
+}
+
+/*
+ * Use CMD53 to read data from SDIO device.
+ * This function MUST be called after sdio_claim_host() or
+ * in SDIO ISR(host had been claimed).
+ *
+ * Parameters:
+ *psdio	pointer of SDIO_DATA
+ *addr	address to read
+ *cnt		amount to read
+ *pdata	pointer to put data, this should be a "DMA:able scratch buffer"!
+ *
+ * Return:
+ *0		Success
+ *others	Fail
+ */
+s32 _sd_read(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, void *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	int err = -EPERM;
+	struct sdio_func *func;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+
+	func = psdio->func;
+
+	if (unlikely((cnt == 1) || (cnt ==2)))
+	{
+		int i;
+		u8 *pbuf = (u8 *)pdata;
+
+		for (i = 0; i < cnt; i++)
+		{
+			*(pbuf+i) = sdio_readb(func, addr+i, &err);
+
+			if (err) {
+				DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x\n", __func__, err, addr);
+				break;
+			}
+		}
+		return err;
+	}
+
+	err = sdio_memcpy_fromio(func, pdata, addr, cnt);
+	if (err) {
+		DBG_871X(KERN_ERR "%s: FAIL(%d)! ADDR =%#x Size =%d\n", __func__, err, addr, cnt);
+	}
+	return err;
+}
+
+/*
+ * Use CMD53 to read data from SDIO device.
+ *
+ * Parameters:
+ *psdio	pointer of SDIO_DATA
+ *addr	address to read
+ *cnt		amount to read
+ *pdata	pointer to put data, this should be a "DMA:able scratch buffer"!
+ *
+ * Return:
+ *0		Success
+ *others	Fail
+ */
+s32 sd_read(struct intf_hdl * pintfhdl, u32 addr, u32 cnt, void *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	struct sdio_func *func;
+	bool claim_needed;
+	s32 err = -EPERM;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	err = _sd_read(pintfhdl, addr, cnt, pdata);
+	if (claim_needed)
+		sdio_release_host(func);
+	return err;
+}
+
+/*
+ * Use CMD53 to write data to SDIO device.
+ * This function MUST be called after sdio_claim_host() or
+ * in SDIO ISR(host had been claimed).
+ *
+ * Parameters:
+ *psdio	pointer of SDIO_DATA
+ *addr	address to write
+ *cnt		amount to write
+ *pdata	data pointer, this should be a "DMA:able scratch buffer"!
+ *
+ * Return:
+ *0		Success
+ *others	Fail
+ */
+s32 _sd_write(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, void *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+
+	struct sdio_func *func;
+	u32 size;
+	s32 err =-EPERM;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+
+	func = psdio->func;
+/* 	size = sdio_align_size(func, cnt); */
+
+	if (unlikely((cnt == 1) || (cnt ==2)))
+	{
+		int i;
+		u8 *pbuf = (u8 *)pdata;
+
+		for (i = 0; i < cnt; i++)
+		{
+			sdio_writeb(func, *(pbuf+i), addr+i, &err);
+			if (err) {
+				DBG_871X(KERN_ERR "%s: FAIL!(%d) addr = 0x%05x val = 0x%02x\n", __func__, err, addr, *(pbuf+i));
+				break;
+			}
+		}
+
+		return err;
+	}
+
+	size = cnt;
+	err = sdio_memcpy_toio(func, addr, pdata, size);
+	if (err) {
+		DBG_871X(KERN_ERR "%s: FAIL(%d)! ADDR =%#x Size =%d(%d)\n", __func__, err, addr, cnt, size);
+	}
+	return err;
+}
+
+/*
+ * Use CMD53 to write data to SDIO device.
+ *
+ * Parameters:
+ *  psdio	pointer of SDIO_DATA
+ *  addr	address to write
+ *  cnt		amount to write
+ *  pdata	data pointer, this should be a "DMA:able scratch buffer"!
+ *
+ * Return:
+ *  0		Success
+ *  others	Fail
+ */
+s32 sd_write(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, void *pdata)
+{
+	struct adapter *padapter;
+	struct dvobj_priv *psdiodev;
+	PSDIO_DATA psdio;
+	struct sdio_func *func;
+	bool claim_needed;
+	s32 err =-EPERM;
+
+	padapter = pintfhdl->padapter;
+	psdiodev = pintfhdl->pintf_dev;
+	psdio = &psdiodev->intf_data;
+
+	if (padapter->bSurpriseRemoved) {
+		/* DBG_871X(" %s (padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n", __func__); */
+		return err;
+	}
+
+	func = psdio->func;
+	claim_needed = rtw_sdio_claim_host_needed(func);
+
+	if (claim_needed)
+		sdio_claim_host(func);
+	err = _sd_write(pintfhdl, addr, cnt, pdata);
+	if (claim_needed)
+		sdio_release_host(func);
+	return err;
+}