Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1006 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/libertas/if_cs.c b/kernel/drivers/net/wireless/libertas/if_cs.c
new file mode 100644
index 000000000..f499efc6a
--- /dev/null
+++ b/kernel/drivers/net/wireless/libertas/if_cs.c
@@ -0,0 +1,1006 @@
+/*
+
+  Driver for the Marvell 8385 based compact flash WLAN cards.
+
+  (C) 2007 by Holger Schurig <hs4233@mail.mn-solutions.de>
+
+  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; see the file COPYING.  If not, write to
+  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+
+*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/moduleparam.h>
+#include <linux/firmware.h>
+#include <linux/netdevice.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include <linux/io.h>
+
+#define DRV_NAME "libertas_cs"
+
+#include "decl.h"
+#include "defs.h"
+#include "dev.h"
+
+
+/********************************************************************/
+/* Module stuff                                                     */
+/********************************************************************/
+
+MODULE_AUTHOR("Holger Schurig <hs4233@mail.mn-solutions.de>");
+MODULE_DESCRIPTION("Driver for Marvell 83xx compact flash WLAN cards");
+MODULE_LICENSE("GPL");
+
+
+
+/********************************************************************/
+/* Data structures                                                  */
+/********************************************************************/
+
+struct if_cs_card {
+	struct pcmcia_device *p_dev;
+	struct lbs_private *priv;
+	void __iomem *iobase;
+	bool align_regs;
+	u32 model;
+};
+
+
+enum {
+	MODEL_UNKNOWN = 0x00,
+	MODEL_8305 = 0x01,
+	MODEL_8381 = 0x02,
+	MODEL_8385 = 0x03
+};
+
+static const struct lbs_fw_table fw_table[] = {
+	{ MODEL_8305, "libertas/cf8305.bin", NULL },
+	{ MODEL_8305, "libertas_cs_helper.fw", NULL },
+	{ MODEL_8381, "libertas/cf8381_helper.bin", "libertas/cf8381.bin" },
+	{ MODEL_8381, "libertas_cs_helper.fw", "libertas_cs.fw" },
+	{ MODEL_8385, "libertas/cf8385_helper.bin", "libertas/cf8385.bin" },
+	{ MODEL_8385, "libertas_cs_helper.fw", "libertas_cs.fw" },
+	{ 0, NULL, NULL }
+};
+MODULE_FIRMWARE("libertas/cf8305.bin");
+MODULE_FIRMWARE("libertas/cf8381_helper.bin");
+MODULE_FIRMWARE("libertas/cf8381.bin");
+MODULE_FIRMWARE("libertas/cf8385_helper.bin");
+MODULE_FIRMWARE("libertas/cf8385.bin");
+MODULE_FIRMWARE("libertas_cs_helper.fw");
+MODULE_FIRMWARE("libertas_cs.fw");
+
+
+/********************************************************************/
+/* Hardware access                                                  */
+/********************************************************************/
+
+/* This define enables wrapper functions which allow you
+   to dump all register accesses. You normally won't this,
+   except for development */
+/* #define DEBUG_IO */
+
+#ifdef DEBUG_IO
+static int debug_output = 0;
+#else
+/* This way the compiler optimizes the printk's away */
+#define debug_output 0
+#endif
+
+static inline unsigned int if_cs_read8(struct if_cs_card *card, uint reg)
+{
+	unsigned int val = ioread8(card->iobase + reg);
+	if (debug_output)
+		printk(KERN_INFO "inb %08x<%02x\n", reg, val);
+	return val;
+}
+static inline unsigned int if_cs_read16(struct if_cs_card *card, uint reg)
+{
+	unsigned int val = ioread16(card->iobase + reg);
+	if (debug_output)
+		printk(KERN_INFO "inw %08x<%04x\n", reg, val);
+	return val;
+}
+static inline void if_cs_read16_rep(
+	struct if_cs_card *card,
+	uint reg,
+	void *buf,
+	unsigned long count)
+{
+	if (debug_output)
+		printk(KERN_INFO "insw %08x<(0x%lx words)\n",
+			reg, count);
+	ioread16_rep(card->iobase + reg, buf, count);
+}
+
+static inline void if_cs_write8(struct if_cs_card *card, uint reg, u8 val)
+{
+	if (debug_output)
+		printk(KERN_INFO "outb %08x>%02x\n", reg, val);
+	iowrite8(val, card->iobase + reg);
+}
+
+static inline void if_cs_write16(struct if_cs_card *card, uint reg, u16 val)
+{
+	if (debug_output)
+		printk(KERN_INFO "outw %08x>%04x\n", reg, val);
+	iowrite16(val, card->iobase + reg);
+}
+
+static inline void if_cs_write16_rep(
+	struct if_cs_card *card,
+	uint reg,
+	const void *buf,
+	unsigned long count)
+{
+	if (debug_output)
+		printk(KERN_INFO "outsw %08x>(0x%lx words)\n",
+			reg, count);
+	iowrite16_rep(card->iobase + reg, buf, count);
+}
+
+
+/*
+ * I know that polling/delaying is frowned upon. However, this procedure
+ * with polling is needed while downloading the firmware. At this stage,
+ * the hardware does unfortunately not create any interrupts.
+ *
+ * Fortunately, this function is never used once the firmware is in
+ * the card. :-)
+ *
+ * As a reference, see the "Firmware Specification v5.1", page 18
+ * and 19. I did not follow their suggested timing to the word,
+ * but this works nice & fast anyway.
+ */
+static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 reg)
+{
+	int i;
+
+	for (i = 0; i < 100000; i++) {
+		u8 val = if_cs_read8(card, addr);
+		if (val == reg)
+			return 0;
+		udelay(5);
+	}
+	return -ETIME;
+}
+
+
+
+/*
+ * First the bitmasks for the host/card interrupt/status registers:
+ */
+#define IF_CS_BIT_TX			0x0001
+#define IF_CS_BIT_RX			0x0002
+#define IF_CS_BIT_COMMAND		0x0004
+#define IF_CS_BIT_RESP			0x0008
+#define IF_CS_BIT_EVENT			0x0010
+#define	IF_CS_BIT_MASK			0x001f
+
+
+
+/*
+ * It's not really clear to me what the host status register is for. It
+ * needs to be set almost in union with "host int cause". The following
+ * bits from above are used:
+ *
+ *   IF_CS_BIT_TX         driver downloaded a data packet
+ *   IF_CS_BIT_RX         driver got a data packet
+ *   IF_CS_BIT_COMMAND    driver downloaded a command
+ *   IF_CS_BIT_RESP       not used (has some meaning with powerdown)
+ *   IF_CS_BIT_EVENT      driver read a host event
+ */
+#define IF_CS_HOST_STATUS		0x00000000
+
+/*
+ * With the host int cause register can the host (that is, Linux) cause
+ * an interrupt in the firmware, to tell the firmware about those events:
+ *
+ *   IF_CS_BIT_TX         a data packet has been downloaded
+ *   IF_CS_BIT_RX         a received data packet has retrieved
+ *   IF_CS_BIT_COMMAND    a firmware block or a command has been downloaded
+ *   IF_CS_BIT_RESP       not used (has some meaning with powerdown)
+ *   IF_CS_BIT_EVENT      a host event (link lost etc) has been retrieved
+ */
+#define IF_CS_HOST_INT_CAUSE		0x00000002
+
+/*
+ * The host int mask register is used to enable/disable interrupt.  However,
+ * I have the suspicion that disabled interrupts are lost.
+ */
+#define IF_CS_HOST_INT_MASK		0x00000004
+
+/*
+ * Used to send or receive data packets:
+ */
+#define IF_CS_WRITE			0x00000016
+#define IF_CS_WRITE_LEN			0x00000014
+#define IF_CS_READ			0x00000010
+#define IF_CS_READ_LEN			0x00000024
+
+/*
+ * Used to send commands (and to send firmware block) and to
+ * receive command responses:
+ */
+#define IF_CS_CMD			0x0000001A
+#define IF_CS_CMD_LEN			0x00000018
+#define IF_CS_RESP			0x00000012
+#define IF_CS_RESP_LEN			0x00000030
+
+/*
+ * The card status registers shows what the card/firmware actually
+ * accepts:
+ *
+ *   IF_CS_BIT_TX        you may send a data packet
+ *   IF_CS_BIT_RX        you may retrieve a data packet
+ *   IF_CS_BIT_COMMAND   you may send a command
+ *   IF_CS_BIT_RESP      you may retrieve a command response
+ *   IF_CS_BIT_EVENT     the card has a event for use (link lost, snr low etc)
+ *
+ * When reading this register several times, you will get back the same
+ * results --- with one exception: the IF_CS_BIT_EVENT clear itself
+ * automatically.
+ *
+ * Not that we don't rely on BIT_RX,_BIT_RESP or BIT_EVENT because
+ * we handle this via the card int cause register.
+ */
+#define IF_CS_CARD_STATUS		0x00000020
+#define IF_CS_CARD_STATUS_MASK		0x7f00
+
+/*
+ * The card int cause register is used by the card/firmware to notify us
+ * about the following events:
+ *
+ *   IF_CS_BIT_TX        a data packet has successfully been sentx
+ *   IF_CS_BIT_RX        a data packet has been received and can be retrieved
+ *   IF_CS_BIT_COMMAND   not used
+ *   IF_CS_BIT_RESP      the firmware has a command response for us
+ *   IF_CS_BIT_EVENT     the card has a event for use (link lost, snr low etc)
+ */
+#define IF_CS_CARD_INT_CAUSE		0x00000022
+
+/*
+ * This is used to for handshaking with the card's bootloader/helper image
+ * to synchronize downloading of firmware blocks.
+ */
+#define IF_CS_SQ_READ_LOW		0x00000028
+#define IF_CS_SQ_HELPER_OK		0x10
+
+/*
+ * The scratch register tells us ...
+ *
+ * IF_CS_SCRATCH_BOOT_OK     the bootloader runs
+ * IF_CS_SCRATCH_HELPER_OK   the helper firmware already runs
+ */
+#define IF_CS_SCRATCH			0x0000003F
+#define IF_CS_SCRATCH_BOOT_OK		0x00
+#define IF_CS_SCRATCH_HELPER_OK		0x5a
+
+/*
+ * Used to detect ancient chips:
+ */
+#define IF_CS_PRODUCT_ID		0x0000001C
+#define IF_CS_CF8385_B1_REV		0x12
+#define IF_CS_CF8381_B3_REV		0x04
+#define IF_CS_CF8305_B1_REV		0x03
+
+/*
+ * Used to detect other cards than CF8385 since their revisions of silicon
+ * doesn't match those from CF8385, eg. CF8381 B3 works with this driver.
+ */
+#define CF8305_MANFID		0x02db
+#define CF8305_CARDID		0x8103
+#define CF8381_MANFID		0x02db
+#define CF8381_CARDID		0x6064
+#define CF8385_MANFID		0x02df
+#define CF8385_CARDID		0x8103
+
+/*
+ * FIXME: just use the 'driver_info' field of 'struct pcmcia_device_id' when
+ * that gets fixed.  Currently there's no way to access it from the probe hook.
+ */
+static inline u32 get_model(u16 manf_id, u16 card_id)
+{
+	/* NOTE: keep in sync with if_cs_ids */
+	if (manf_id == CF8305_MANFID && card_id == CF8305_CARDID)
+		return MODEL_8305;
+	else if (manf_id == CF8381_MANFID && card_id == CF8381_CARDID)
+		return MODEL_8381;
+	else if (manf_id == CF8385_MANFID && card_id == CF8385_CARDID)
+		return MODEL_8385;
+	return MODEL_UNKNOWN;
+}
+
+/********************************************************************/
+/* I/O and interrupt handling                                       */
+/********************************************************************/
+
+static inline void if_cs_enable_ints(struct if_cs_card *card)
+{
+	lbs_deb_enter(LBS_DEB_CS);
+	if_cs_write16(card, IF_CS_HOST_INT_MASK, 0);
+}
+
+static inline void if_cs_disable_ints(struct if_cs_card *card)
+{
+	lbs_deb_enter(LBS_DEB_CS);
+	if_cs_write16(card, IF_CS_HOST_INT_MASK, IF_CS_BIT_MASK);
+}
+
+/*
+ * Called from if_cs_host_to_card to send a command to the hardware
+ */
+static int if_cs_send_cmd(struct lbs_private *priv, u8 *buf, u16 nb)
+{
+	struct if_cs_card *card = (struct if_cs_card *)priv->card;
+	int ret = -1;
+	int loops = 0;
+
+	lbs_deb_enter(LBS_DEB_CS);
+	if_cs_disable_ints(card);
+
+	/* Is hardware ready? */
+	while (1) {
+		u16 status = if_cs_read16(card, IF_CS_CARD_STATUS);
+		if (status & IF_CS_BIT_COMMAND)
+			break;
+		if (++loops > 100) {
+			netdev_err(priv->dev, "card not ready for commands\n");
+			goto done;
+		}
+		mdelay(1);
+	}
+
+	if_cs_write16(card, IF_CS_CMD_LEN, nb);
+
+	if_cs_write16_rep(card, IF_CS_CMD, buf, nb / 2);
+	/* Are we supposed to transfer an odd amount of bytes? */
+	if (nb & 1)
+		if_cs_write8(card, IF_CS_CMD, buf[nb-1]);
+
+	/* "Assert the download over interrupt command in the Host
+	 * status register" */
+	if_cs_write16(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND);
+
+	/* "Assert the download over interrupt command in the Card
+	 * interrupt case register" */
+	if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND);
+	ret = 0;
+
+done:
+	if_cs_enable_ints(card);
+	lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+	return ret;
+}
+
+/*
+ * Called from if_cs_host_to_card to send a data to the hardware
+ */
+static void if_cs_send_data(struct lbs_private *priv, u8 *buf, u16 nb)
+{
+	struct if_cs_card *card = (struct if_cs_card *)priv->card;
+	u16 status;
+
+	lbs_deb_enter(LBS_DEB_CS);
+	if_cs_disable_ints(card);
+
+	status = if_cs_read16(card, IF_CS_CARD_STATUS);
+	BUG_ON((status & IF_CS_BIT_TX) == 0);
+
+	if_cs_write16(card, IF_CS_WRITE_LEN, nb);
+
+	/* write even number of bytes, then odd byte if necessary */
+	if_cs_write16_rep(card, IF_CS_WRITE, buf, nb / 2);
+	if (nb & 1)
+		if_cs_write8(card, IF_CS_WRITE, buf[nb-1]);
+
+	if_cs_write16(card, IF_CS_HOST_STATUS, IF_CS_BIT_TX);
+	if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_TX);
+	if_cs_enable_ints(card);
+
+	lbs_deb_leave(LBS_DEB_CS);
+}
+
+/*
+ * Get the command result out of the card.
+ */
+static int if_cs_receive_cmdres(struct lbs_private *priv, u8 *data, u32 *len)
+{
+	unsigned long flags;
+	int ret = -1;
+	u16 status;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	/* is hardware ready? */
+	status = if_cs_read16(priv->card, IF_CS_CARD_STATUS);
+	if ((status & IF_CS_BIT_RESP) == 0) {
+		netdev_err(priv->dev, "no cmd response in card\n");
+		*len = 0;
+		goto out;
+	}
+
+	*len = if_cs_read16(priv->card, IF_CS_RESP_LEN);
+	if ((*len == 0) || (*len > LBS_CMD_BUFFER_SIZE)) {
+		netdev_err(priv->dev,
+			   "card cmd buffer has invalid # of bytes (%d)\n",
+			   *len);
+		goto out;
+	}
+
+	/* read even number of bytes, then odd byte if necessary */
+	if_cs_read16_rep(priv->card, IF_CS_RESP, data, *len/sizeof(u16));
+	if (*len & 1)
+		data[*len-1] = if_cs_read8(priv->card, IF_CS_RESP);
+
+	/* This is a workaround for a firmware that reports too much
+	 * bytes */
+	*len -= 8;
+	ret = 0;
+
+	/* Clear this flag again */
+	spin_lock_irqsave(&priv->driver_lock, flags);
+	priv->dnld_sent = DNLD_RES_RECEIVED;
+	spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+out:
+	lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
+	return ret;
+}
+
+static struct sk_buff *if_cs_receive_data(struct lbs_private *priv)
+{
+	struct sk_buff *skb = NULL;
+	u16 len;
+	u8 *data;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	len = if_cs_read16(priv->card, IF_CS_READ_LEN);
+	if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
+		netdev_err(priv->dev,
+			   "card data buffer has invalid # of bytes (%d)\n",
+			   len);
+		priv->dev->stats.rx_dropped++;
+		goto dat_err;
+	}
+
+	skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + 2);
+	if (!skb)
+		goto out;
+	skb_put(skb, len);
+	skb_reserve(skb, 2);/* 16 byte align */
+	data = skb->data;
+
+	/* read even number of bytes, then odd byte if necessary */
+	if_cs_read16_rep(priv->card, IF_CS_READ, data, len/sizeof(u16));
+	if (len & 1)
+		data[len-1] = if_cs_read8(priv->card, IF_CS_READ);
+
+dat_err:
+	if_cs_write16(priv->card, IF_CS_HOST_STATUS, IF_CS_BIT_RX);
+	if_cs_write16(priv->card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_RX);
+
+out:
+	lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb);
+	return skb;
+}
+
+static irqreturn_t if_cs_interrupt(int irq, void *data)
+{
+	struct if_cs_card *card = data;
+	struct lbs_private *priv = card->priv;
+	u16 cause;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	/* Ask card interrupt cause register if there is something for us */
+	cause = if_cs_read16(card, IF_CS_CARD_INT_CAUSE);
+	lbs_deb_cs("cause 0x%04x\n", cause);
+
+	if (cause == 0) {
+		/* Not for us */
+		return IRQ_NONE;
+	}
+
+	if (cause == 0xffff) {
+		/* Read in junk, the card has probably been removed */
+		card->priv->surpriseremoved = 1;
+		return IRQ_HANDLED;
+	}
+
+	if (cause & IF_CS_BIT_RX) {
+		struct sk_buff *skb;
+		lbs_deb_cs("rx packet\n");
+		skb = if_cs_receive_data(priv);
+		if (skb)
+			lbs_process_rxed_packet(priv, skb);
+	}
+
+	if (cause & IF_CS_BIT_TX) {
+		lbs_deb_cs("tx done\n");
+		lbs_host_to_card_done(priv);
+	}
+
+	if (cause & IF_CS_BIT_RESP) {
+		unsigned long flags;
+		u8 i;
+
+		lbs_deb_cs("cmd resp\n");
+		spin_lock_irqsave(&priv->driver_lock, flags);
+		i = (priv->resp_idx == 0) ? 1 : 0;
+		spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+		BUG_ON(priv->resp_len[i]);
+		if_cs_receive_cmdres(priv, priv->resp_buf[i],
+			&priv->resp_len[i]);
+
+		spin_lock_irqsave(&priv->driver_lock, flags);
+		lbs_notify_command_response(priv, i);
+		spin_unlock_irqrestore(&priv->driver_lock, flags);
+	}
+
+	if (cause & IF_CS_BIT_EVENT) {
+		u16 status = if_cs_read16(priv->card, IF_CS_CARD_STATUS);
+		if_cs_write16(priv->card, IF_CS_HOST_INT_CAUSE,
+			IF_CS_BIT_EVENT);
+		lbs_queue_event(priv, (status & IF_CS_CARD_STATUS_MASK) >> 8);
+	}
+
+	/* Clear interrupt cause */
+	if_cs_write16(card, IF_CS_CARD_INT_CAUSE, cause & IF_CS_BIT_MASK);
+
+	lbs_deb_leave(LBS_DEB_CS);
+	return IRQ_HANDLED;
+}
+
+
+
+
+/********************************************************************/
+/* Firmware                                                         */
+/********************************************************************/
+
+/*
+ * Tries to program the helper firmware.
+ *
+ * Return 0 on success
+ */
+static int if_cs_prog_helper(struct if_cs_card *card, const struct firmware *fw)
+{
+	int ret = 0;
+	int sent = 0;
+	u8  scratch;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	/*
+	 * This is the only place where an unaligned register access happens on
+	 * the CF8305 card, therefore for the sake of speed of the driver, we do
+	 * the alignment correction here.
+	 */
+	if (card->align_regs)
+		scratch = if_cs_read16(card, IF_CS_SCRATCH) >> 8;
+	else
+		scratch = if_cs_read8(card, IF_CS_SCRATCH);
+
+	/* "If the value is 0x5a, the firmware is already
+	 * downloaded successfully"
+	 */
+	if (scratch == IF_CS_SCRATCH_HELPER_OK)
+		goto done;
+
+	/* "If the value is != 00, it is invalid value of register */
+	if (scratch != IF_CS_SCRATCH_BOOT_OK) {
+		ret = -ENODEV;
+		goto done;
+	}
+
+	lbs_deb_cs("helper size %td\n", fw->size);
+
+	/* "Set the 5 bytes of the helper image to 0" */
+	/* Not needed, this contains an ARM branch instruction */
+
+	for (;;) {
+		/* "the number of bytes to send is 256" */
+		int count = 256;
+		int remain = fw->size - sent;
+
+		if (remain < count)
+			count = remain;
+
+		/*
+		 * "write the number of bytes to be sent to the I/O Command
+		 * write length register"
+		 */
+		if_cs_write16(card, IF_CS_CMD_LEN, count);
+
+		/* "write this to I/O Command port register as 16 bit writes */
+		if (count)
+			if_cs_write16_rep(card, IF_CS_CMD,
+				&fw->data[sent],
+				count >> 1);
+
+		/*
+		 * "Assert the download over interrupt command in the Host
+		 * status register"
+		 */
+		if_cs_write8(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND);
+
+		/*
+		 * "Assert the download over interrupt command in the Card
+		 * interrupt case register"
+		 */
+		if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND);
+
+		/*
+		 * "The host polls the Card Status register ... for 50 ms before
+		 * declaring a failure"
+		 */
+		ret = if_cs_poll_while_fw_download(card, IF_CS_CARD_STATUS,
+			IF_CS_BIT_COMMAND);
+		if (ret < 0) {
+			pr_err("can't download helper at 0x%x, ret %d\n",
+			       sent, ret);
+			goto done;
+		}
+
+		if (count == 0)
+			break;
+
+		sent += count;
+	}
+
+done:
+	lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+	return ret;
+}
+
+
+static int if_cs_prog_real(struct if_cs_card *card, const struct firmware *fw)
+{
+	int ret = 0;
+	int retry = 0;
+	int len = 0;
+	int sent;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	lbs_deb_cs("fw size %td\n", fw->size);
+
+	ret = if_cs_poll_while_fw_download(card, IF_CS_SQ_READ_LOW,
+		IF_CS_SQ_HELPER_OK);
+	if (ret < 0) {
+		pr_err("helper firmware doesn't answer\n");
+		goto done;
+	}
+
+	for (sent = 0; sent < fw->size; sent += len) {
+		len = if_cs_read16(card, IF_CS_SQ_READ_LOW);
+		if (len & 1) {
+			retry++;
+			pr_info("odd, need to retry this firmware block\n");
+		} else {
+			retry = 0;
+		}
+
+		if (retry > 20) {
+			pr_err("could not download firmware\n");
+			ret = -ENODEV;
+			goto done;
+		}
+		if (retry) {
+			sent -= len;
+		}
+
+
+		if_cs_write16(card, IF_CS_CMD_LEN, len);
+
+		if_cs_write16_rep(card, IF_CS_CMD,
+			&fw->data[sent],
+			(len+1) >> 1);
+		if_cs_write8(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND);
+		if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND);
+
+		ret = if_cs_poll_while_fw_download(card, IF_CS_CARD_STATUS,
+			IF_CS_BIT_COMMAND);
+		if (ret < 0) {
+			pr_err("can't download firmware at 0x%x\n", sent);
+			goto done;
+		}
+	}
+
+	ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a);
+	if (ret < 0)
+		pr_err("firmware download failed\n");
+
+done:
+	lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+	return ret;
+}
+
+static void if_cs_prog_firmware(struct lbs_private *priv, int ret,
+				 const struct firmware *helper,
+				 const struct firmware *mainfw)
+{
+	struct if_cs_card *card = priv->card;
+
+	if (ret) {
+		pr_err("failed to find firmware (%d)\n", ret);
+		return;
+	}
+
+	/* Load the firmware */
+	ret = if_cs_prog_helper(card, helper);
+	if (ret == 0 && (card->model != MODEL_8305))
+		ret = if_cs_prog_real(card, mainfw);
+	if (ret)
+		return;
+
+	/* Now actually get the IRQ */
+	ret = request_irq(card->p_dev->irq, if_cs_interrupt,
+		IRQF_SHARED, DRV_NAME, card);
+	if (ret) {
+		pr_err("error in request_irq\n");
+		return;
+	}
+
+	/*
+	 * Clear any interrupt cause that happened while sending
+	 * firmware/initializing card
+	 */
+	if_cs_write16(card, IF_CS_CARD_INT_CAUSE, IF_CS_BIT_MASK);
+	if_cs_enable_ints(card);
+
+	/* And finally bring the card up */
+	priv->fw_ready = 1;
+	if (lbs_start_card(priv) != 0) {
+		pr_err("could not activate card\n");
+		free_irq(card->p_dev->irq, card);
+	}
+}
+
+
+/********************************************************************/
+/* Callback functions for libertas.ko                               */
+/********************************************************************/
+
+/* Send commands or data packets to the card */
+static int if_cs_host_to_card(struct lbs_private *priv,
+	u8 type,
+	u8 *buf,
+	u16 nb)
+{
+	int ret = -1;
+
+	lbs_deb_enter_args(LBS_DEB_CS, "type %d, bytes %d", type, nb);
+
+	switch (type) {
+	case MVMS_DAT:
+		priv->dnld_sent = DNLD_DATA_SENT;
+		if_cs_send_data(priv, buf, nb);
+		ret = 0;
+		break;
+	case MVMS_CMD:
+		priv->dnld_sent = DNLD_CMD_SENT;
+		ret = if_cs_send_cmd(priv, buf, nb);
+		break;
+	default:
+		netdev_err(priv->dev, "%s: unsupported type %d\n",
+			   __func__, type);
+	}
+
+	lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+	return ret;
+}
+
+
+static void if_cs_release(struct pcmcia_device *p_dev)
+{
+	struct if_cs_card *card = p_dev->priv;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	free_irq(p_dev->irq, card);
+	pcmcia_disable_device(p_dev);
+	if (card->iobase)
+		ioport_unmap(card->iobase);
+
+	lbs_deb_leave(LBS_DEB_CS);
+}
+
+
+static int if_cs_ioprobe(struct pcmcia_device *p_dev, void *priv_data)
+{
+	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
+
+	if (p_dev->resource[1]->end) {
+		pr_err("wrong CIS (check number of IO windows)\n");
+		return -ENODEV;
+	}
+
+	/* This reserves IO space but doesn't actually enable it */
+	return pcmcia_request_io(p_dev);
+}
+
+static int if_cs_probe(struct pcmcia_device *p_dev)
+{
+	int ret = -ENOMEM;
+	unsigned int prod_id;
+	struct lbs_private *priv;
+	struct if_cs_card *card;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL);
+	if (!card)
+		goto out;
+
+	card->p_dev = p_dev;
+	p_dev->priv = card;
+
+	p_dev->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+
+	if (pcmcia_loop_config(p_dev, if_cs_ioprobe, NULL)) {
+		pr_err("error in pcmcia_loop_config\n");
+		goto out1;
+	}
+
+	/*
+	 * Allocate an interrupt line.  Note that this does not assign
+	 * a handler to the interrupt, unless the 'Handler' member of
+	 * the irq structure is initialized.
+	 */
+	if (!p_dev->irq)
+		goto out1;
+
+	/* Initialize io access */
+	card->iobase = ioport_map(p_dev->resource[0]->start,
+				resource_size(p_dev->resource[0]));
+	if (!card->iobase) {
+		pr_err("error in ioport_map\n");
+		ret = -EIO;
+		goto out1;
+	}
+
+	ret = pcmcia_enable_device(p_dev);
+	if (ret) {
+		pr_err("error in pcmcia_enable_device\n");
+		goto out2;
+	}
+
+	/* Finally, report what we've done */
+	lbs_deb_cs("irq %d, io %pR", p_dev->irq, p_dev->resource[0]);
+
+	/*
+	 * Most of the libertas cards can do unaligned register access, but some
+	 * weird ones cannot. That's especially true for the CF8305 card.
+	 */
+	card->align_regs = false;
+
+	card->model = get_model(p_dev->manf_id, p_dev->card_id);
+	if (card->model == MODEL_UNKNOWN) {
+		pr_err("unsupported manf_id 0x%04x / card_id 0x%04x\n",
+		       p_dev->manf_id, p_dev->card_id);
+		ret = -ENODEV;
+		goto out2;
+	}
+
+	/* Check if we have a current silicon */
+	prod_id = if_cs_read8(card, IF_CS_PRODUCT_ID);
+	if (card->model == MODEL_8305) {
+		card->align_regs = true;
+		if (prod_id < IF_CS_CF8305_B1_REV) {
+			pr_err("8305 rev B0 and older are not supported\n");
+			ret = -ENODEV;
+			goto out2;
+		}
+	}
+
+	if ((card->model == MODEL_8381) && prod_id < IF_CS_CF8381_B3_REV) {
+		pr_err("8381 rev B2 and older are not supported\n");
+		ret = -ENODEV;
+		goto out2;
+	}
+
+	if ((card->model == MODEL_8385) && prod_id < IF_CS_CF8385_B1_REV) {
+		pr_err("8385 rev B0 and older are not supported\n");
+		ret = -ENODEV;
+		goto out2;
+	}
+
+	/* Make this card known to the libertas driver */
+	priv = lbs_add_card(card, &p_dev->dev);
+	if (!priv) {
+		ret = -ENOMEM;
+		goto out2;
+	}
+
+	/* Set up fields in lbs_private */
+	card->priv = priv;
+	priv->card = card;
+	priv->hw_host_to_card = if_cs_host_to_card;
+	priv->enter_deep_sleep = NULL;
+	priv->exit_deep_sleep = NULL;
+	priv->reset_deep_sleep_wakeup = NULL;
+
+	/* Get firmware */
+	ret = lbs_get_firmware_async(priv, &p_dev->dev, card->model, fw_table,
+				     if_cs_prog_firmware);
+	if (ret) {
+		pr_err("failed to find firmware (%d)\n", ret);
+		goto out3;
+	}
+
+	goto out;
+
+out3:
+	lbs_remove_card(priv);
+out2:
+	ioport_unmap(card->iobase);
+out1:
+	pcmcia_disable_device(p_dev);
+out:
+	lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+	return ret;
+}
+
+
+static void if_cs_detach(struct pcmcia_device *p_dev)
+{
+	struct if_cs_card *card = p_dev->priv;
+
+	lbs_deb_enter(LBS_DEB_CS);
+
+	lbs_stop_card(card->priv);
+	lbs_remove_card(card->priv);
+	if_cs_disable_ints(card);
+	if_cs_release(p_dev);
+	kfree(card);
+
+	lbs_deb_leave(LBS_DEB_CS);
+}
+
+
+
+/********************************************************************/
+/* Module initialization                                            */
+/********************************************************************/
+
+static const struct pcmcia_device_id if_cs_ids[] = {
+	PCMCIA_DEVICE_MANF_CARD(CF8305_MANFID, CF8305_CARDID),
+	PCMCIA_DEVICE_MANF_CARD(CF8381_MANFID, CF8381_CARDID),
+	PCMCIA_DEVICE_MANF_CARD(CF8385_MANFID, CF8385_CARDID),
+	/* NOTE: keep in sync with get_model() */
+	PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, if_cs_ids);
+
+static struct pcmcia_driver lbs_driver = {
+	.owner		= THIS_MODULE,
+	.name		= DRV_NAME,
+	.probe		= if_cs_probe,
+	.remove		= if_cs_detach,
+	.id_table       = if_cs_ids,
+};
+module_pcmcia_driver(lbs_driver);