Linux-libre 4.5-gnu

1 files changed, 0 insertions, 1310 deletions

diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c
deleted file mode 100644
index d51293895..000000000
--- a/drivers/net/wireless/libertas/if_spi.c
+++ /dev/null
@@ -1,1310 +0,0 @@
-/*
- *	linux/drivers/net/wireless/libertas/if_spi.c
- *
- *	Driver for Marvell SPI WLAN cards.
- *
- *	Copyright 2008 Analog Devices Inc.
- *
- *	Authors:
- *	Andrey Yurovsky <andrey@cozybit.com>
- *	Colin McCabe <colin@cozybit.com>
- *
- *	Inspired by if_sdio.c, Copyright 2007-2008 Pierre Ossman
- *
- * 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.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/hardirq.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/firmware.h>
-#include <linux/jiffies.h>
-#include <linux/list.h>
-#include <linux/netdevice.h>
-#include <linux/slab.h>
-#include <linux/spi/libertas_spi.h>
-#include <linux/spi/spi.h>
-
-#include "host.h"
-#include "decl.h"
-#include "defs.h"
-#include "dev.h"
-#include "if_spi.h"
-
-struct if_spi_packet {
-	struct list_head		list;
-	u16				blen;
-	u8				buffer[0] __attribute__((aligned(4)));
-};
-
-struct if_spi_card {
-	struct spi_device		*spi;
-	struct lbs_private		*priv;
-	struct libertas_spi_platform_data *pdata;
-
-	/* The card ID and card revision, as reported by the hardware. */
-	u16				card_id;
-	u8				card_rev;
-
-	/* The last time that we initiated an SPU operation */
-	unsigned long			prev_xfer_time;
-
-	int				use_dummy_writes;
-	unsigned long			spu_port_delay;
-	unsigned long			spu_reg_delay;
-
-	/* Handles all SPI communication (except for FW load) */
-	struct workqueue_struct		*workqueue;
-	struct work_struct		packet_work;
-	struct work_struct		resume_work;
-
-	u8				cmd_buffer[IF_SPI_CMD_BUF_SIZE];
-
-	/* A buffer of incoming packets from libertas core.
-	 * Since we can't sleep in hw_host_to_card, we have to buffer
-	 * them. */
-	struct list_head		cmd_packet_list;
-	struct list_head		data_packet_list;
-
-	/* Protects cmd_packet_list and data_packet_list */
-	spinlock_t			buffer_lock;
-
-	/* True is card suspended */
-	u8				suspended;
-};
-
-static void free_if_spi_card(struct if_spi_card *card)
-{
-	struct list_head *cursor, *next;
-	struct if_spi_packet *packet;
-
-	list_for_each_safe(cursor, next, &card->cmd_packet_list) {
-		packet = container_of(cursor, struct if_spi_packet, list);
-		list_del(&packet->list);
-		kfree(packet);
-	}
-	list_for_each_safe(cursor, next, &card->data_packet_list) {
-		packet = container_of(cursor, struct if_spi_packet, list);
-		list_del(&packet->list);
-		kfree(packet);
-	}
-	kfree(card);
-}
-
-#define MODEL_8385	0x04
-#define MODEL_8686	0x0b
-#define MODEL_8688	0x10
-
-static const struct lbs_fw_table fw_table[] = {
-	{ MODEL_8385, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
-	{ MODEL_8385, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
-	{ MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
-	{ MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
-	{ MODEL_8688, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
-	{ 0, NULL, NULL }
-};
-/*(DEBLOBBED)*/
-
-
-/*
- * SPI Interface Unit Routines
- *
- * The SPU sits between the host and the WLAN module.
- * All communication with the firmware is through SPU transactions.
- *
- * First we have to put a SPU register name on the bus. Then we can
- * either read from or write to that register.
- *
- */
-
-static void spu_transaction_init(struct if_spi_card *card)
-{
-	if (!time_after(jiffies, card->prev_xfer_time + 1)) {
-		/* Unfortunately, the SPU requires a delay between successive
-		 * transactions. If our last transaction was more than a jiffy
-		 * ago, we have obviously already delayed enough.
-		 * If not, we have to busy-wait to be on the safe side. */
-		ndelay(400);
-	}
-}
-
-static void spu_transaction_finish(struct if_spi_card *card)
-{
-	card->prev_xfer_time = jiffies;
-}
-
-/*
- * Write out a byte buffer to an SPI register,
- * using a series of 16-bit transfers.
- */
-static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len)
-{
-	int err = 0;
-	__le16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK);
-	struct spi_message m;
-	struct spi_transfer reg_trans;
-	struct spi_transfer data_trans;
-
-	spi_message_init(&m);
-	memset(&reg_trans, 0, sizeof(reg_trans));
-	memset(&data_trans, 0, sizeof(data_trans));
-
-	/* You must give an even number of bytes to the SPU, even if it
-	 * doesn't care about the last one.  */
-	BUG_ON(len & 0x1);
-
-	spu_transaction_init(card);
-
-	/* write SPU register index */
-	reg_trans.tx_buf = &reg_out;
-	reg_trans.len = sizeof(reg_out);
-
-	data_trans.tx_buf = buf;
-	data_trans.len = len;
-
-	spi_message_add_tail(&reg_trans, &m);
-	spi_message_add_tail(&data_trans, &m);
-
-	err = spi_sync(card->spi, &m);
-	spu_transaction_finish(card);
-	return err;
-}
-
-static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val)
-{
-	__le16 buff;
-
-	buff = cpu_to_le16(val);
-	return spu_write(card, reg, (u8 *)&buff, sizeof(u16));
-}
-
-static inline int spu_reg_is_port_reg(u16 reg)
-{
-	switch (reg) {
-	case IF_SPI_IO_RDWRPORT_REG:
-	case IF_SPI_CMD_RDWRPORT_REG:
-	case IF_SPI_DATA_RDWRPORT_REG:
-		return 1;
-	default:
-		return 0;
-	}
-}
-
-static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len)
-{
-	unsigned int delay;
-	int err = 0;
-	__le16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK);
-	struct spi_message m;
-	struct spi_transfer reg_trans;
-	struct spi_transfer dummy_trans;
-	struct spi_transfer data_trans;
-
-	/*
-	 * You must take an even number of bytes from the SPU, even if you
-	 * don't care about the last one.
-	 */
-	BUG_ON(len & 0x1);
-
-	spu_transaction_init(card);
-
-	spi_message_init(&m);
-	memset(&reg_trans, 0, sizeof(reg_trans));
-	memset(&dummy_trans, 0, sizeof(dummy_trans));
-	memset(&data_trans, 0, sizeof(data_trans));
-
-	/* write SPU register index */
-	reg_trans.tx_buf = &reg_out;
-	reg_trans.len = sizeof(reg_out);
-	spi_message_add_tail(&reg_trans, &m);
-
-	delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay :
-						card->spu_reg_delay;
-	if (card->use_dummy_writes) {
-		/* Clock in dummy cycles while the SPU fills the FIFO */
-		dummy_trans.len = delay / 8;
-		spi_message_add_tail(&dummy_trans, &m);
-	} else {
-		/* Busy-wait while the SPU fills the FIFO */
-		reg_trans.delay_usecs =
-			DIV_ROUND_UP((100 + (delay * 10)), 1000);
-	}
-
-	/* read in data */
-	data_trans.rx_buf = buf;
-	data_trans.len = len;
-	spi_message_add_tail(&data_trans, &m);
-
-	err = spi_sync(card->spi, &m);
-	spu_transaction_finish(card);
-	return err;
-}
-
-/* Read 16 bits from an SPI register */
-static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val)
-{
-	__le16 buf;
-	int ret;
-
-	ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf));
-	if (ret == 0)
-		*val = le16_to_cpup(&buf);
-	return ret;
-}
-
-/*
- * Read 32 bits from an SPI register.
- * The low 16 bits are read first.
- */
-static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val)
-{
-	__le32 buf;
-	int err;
-
-	err = spu_read(card, reg, (u8 *)&buf, sizeof(buf));
-	if (!err)
-		*val = le32_to_cpup(&buf);
-	return err;
-}
-
-/*
- * Keep reading 16 bits from an SPI register until you get the correct result.
- *
- * If mask = 0, the correct result is any non-zero number.
- * If mask != 0, the correct result is any number where
- * number & target_mask == target
- *
- * Returns -ETIMEDOUT if a second passes without the correct result.
- */
-static int spu_wait_for_u16(struct if_spi_card *card, u16 reg,
-			u16 target_mask, u16 target)
-{
-	int err;
-	unsigned long timeout = jiffies + 5*HZ;
-	while (1) {
-		u16 val;
-		err = spu_read_u16(card, reg, &val);
-		if (err)
-			return err;
-		if (target_mask) {
-			if ((val & target_mask) == target)
-				return 0;
-		} else {
-			if (val)
-				return 0;
-		}
-		udelay(100);
-		if (time_after(jiffies, timeout)) {
-			pr_err("%s: timeout with val=%02x, target_mask=%02x, target=%02x\n",
-			       __func__, val, target_mask, target);
-			return -ETIMEDOUT;
-		}
-	}
-}
-
-/*
- * Read 16 bits from an SPI register until you receive a specific value.
- * Returns -ETIMEDOUT if a 4 tries pass without success.
- */
-static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target)
-{
-	int err, try;
-	for (try = 0; try < 4; ++try) {
-		u32 val = 0;
-		err = spu_read_u32(card, reg, &val);
-		if (err)
-			return err;
-		if (val == target)
-			return 0;
-		mdelay(100);
-	}
-	return -ETIMEDOUT;
-}
-
-static int spu_set_interrupt_mode(struct if_spi_card *card,
-			   int suppress_host_int,
-			   int auto_int)
-{
-	int err = 0;
-
-	/*
-	 * We can suppress a host interrupt by clearing the appropriate
-	 * bit in the "host interrupt status mask" register
-	 */
-	if (suppress_host_int) {
-		err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0);
-		if (err)
-			return err;
-	} else {
-		err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG,
-			      IF_SPI_HISM_TX_DOWNLOAD_RDY |
-			      IF_SPI_HISM_RX_UPLOAD_RDY |
-			      IF_SPI_HISM_CMD_DOWNLOAD_RDY |
-			      IF_SPI_HISM_CARDEVENT |
-			      IF_SPI_HISM_CMD_UPLOAD_RDY);
-		if (err)
-			return err;
-	}
-
-	/*
-	 * If auto-interrupts are on, the completion of certain transactions
-	 * will trigger an interrupt automatically. If auto-interrupts
-	 * are off, we need to set the "Card Interrupt Cause" register to
-	 * trigger a card interrupt.
-	 */
-	if (auto_int) {
-		err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG,
-				IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO |
-				IF_SPI_HICT_RX_UPLOAD_OVER_AUTO |
-				IF_SPI_HICT_CMD_DOWNLOAD_OVER_AUTO |
-				IF_SPI_HICT_CMD_UPLOAD_OVER_AUTO);
-		if (err)
-			return err;
-	} else {
-		err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0);
-		if (err)
-			return err;
-	}
-	return err;
-}
-
-static int spu_get_chip_revision(struct if_spi_card *card,
-				  u16 *card_id, u8 *card_rev)
-{
-	int err = 0;
-	u32 dev_ctrl;
-	err = spu_read_u32(card, IF_SPI_DEVICEID_CTRL_REG, &dev_ctrl);
-	if (err)
-		return err;
-	*card_id = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_ID(dev_ctrl);
-	*card_rev = IF_SPI_DEVICEID_CTRL_REG_TO_CARD_REV(dev_ctrl);
-	return err;
-}
-
-static int spu_set_bus_mode(struct if_spi_card *card, u16 mode)
-{
-	int err = 0;
-	u16 rval;
-	/* set bus mode */
-	err = spu_write_u16(card, IF_SPI_SPU_BUS_MODE_REG, mode);
-	if (err)
-		return err;
-	/* Check that we were able to read back what we just wrote. */
-	err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval);
-	if (err)
-		return err;
-	if ((rval & 0xF) != mode) {
-		pr_err("Can't read bus mode register\n");
-		return -EIO;
-	}
-	return 0;
-}
-
-static int spu_init(struct if_spi_card *card, int use_dummy_writes)
-{
-	int err = 0;
-	u32 delay;
-
-	/*
-	 * We have to start up in timed delay mode so that we can safely
-	 * read the Delay Read Register.
-	 */
-	card->use_dummy_writes = 0;
-	err = spu_set_bus_mode(card,
-				IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING |
-				IF_SPI_BUS_MODE_DELAY_METHOD_TIMED |
-				IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA);
-	if (err)
-		return err;
-	card->spu_port_delay = 1000;
-	card->spu_reg_delay = 1000;
-	err = spu_read_u32(card, IF_SPI_DELAY_READ_REG, &delay);
-	if (err)
-		return err;
-	card->spu_port_delay = delay & 0x0000ffff;
-	card->spu_reg_delay = (delay & 0xffff0000) >> 16;
-
-	/* If dummy clock delay mode has been requested, switch to it now */
-	if (use_dummy_writes) {
-		card->use_dummy_writes = 1;
-		err = spu_set_bus_mode(card,
-				IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING |
-				IF_SPI_BUS_MODE_DELAY_METHOD_DUMMY_CLOCK |
-				IF_SPI_BUS_MODE_16_BIT_ADDRESS_16_BIT_DATA);
-		if (err)
-			return err;
-	}
-
-	lbs_deb_spi("Initialized SPU unit. "
-		    "spu_port_delay=0x%04lx, spu_reg_delay=0x%04lx\n",
-		    card->spu_port_delay, card->spu_reg_delay);
-	return err;
-}
-
-/*
- * Firmware Loading
- */
-
-static int if_spi_prog_helper_firmware(struct if_spi_card *card,
-					const struct firmware *firmware)
-{
-	int err = 0;
-	int bytes_remaining;
-	const u8 *fw;
-	u8 temp[HELPER_FW_LOAD_CHUNK_SZ];
-
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	err = spu_set_interrupt_mode(card, 1, 0);
-	if (err)
-		goto out;
-
-	bytes_remaining = firmware->size;
-	fw = firmware->data;
-
-	/* Load helper firmware image */
-	while (bytes_remaining > 0) {
-		/*
-		 * Scratch pad 1 should contain the number of bytes we
-		 * want to download to the firmware
-		 */
-		err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG,
-					HELPER_FW_LOAD_CHUNK_SZ);
-		if (err)
-			goto out;
-
-		err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG,
-					IF_SPI_HIST_CMD_DOWNLOAD_RDY,
-					IF_SPI_HIST_CMD_DOWNLOAD_RDY);
-		if (err)
-			goto out;
-
-		/*
-		 * Feed the data into the command read/write port reg
-		 * in chunks of 64 bytes
-		 */
-		memset(temp, 0, sizeof(temp));
-		memcpy(temp, fw,
-		       min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ));
-		mdelay(10);
-		err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG,
-					temp, HELPER_FW_LOAD_CHUNK_SZ);
-		if (err)
-			goto out;
-
-		/* Interrupt the boot code */
-		err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0);
-		if (err)
-			goto out;
-		err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG,
-				       IF_SPI_CIC_CMD_DOWNLOAD_OVER);
-		if (err)
-			goto out;
-		bytes_remaining -= HELPER_FW_LOAD_CHUNK_SZ;
-		fw += HELPER_FW_LOAD_CHUNK_SZ;
-	}
-
-	/*
-	 * Once the helper / single stage firmware download is complete,
-	 * write 0 to scratch pad 1 and interrupt the
-	 * bootloader. This completes the helper download.
-	 */
-	err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK);
-	if (err)
-		goto out;
-	err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0);
-	if (err)
-		goto out;
-	err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG,
-				IF_SPI_CIC_CMD_DOWNLOAD_OVER);
-out:
-	if (err)
-		pr_err("failed to load helper firmware (err=%d)\n", err);
-	lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err);
-	return err;
-}
-
-/*
- * Returns the length of the next packet the firmware expects us to send.
- * Sets crc_err if the previous transfer had a CRC error.
- */
-static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card,
-						int *crc_err)
-{
-	u16 len;
-	int err = 0;
-
-	/*
-	 * wait until the host interrupt status register indicates
-	 * that we are ready to download
-	 */
-	err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG,
-				IF_SPI_HIST_CMD_DOWNLOAD_RDY,
-				IF_SPI_HIST_CMD_DOWNLOAD_RDY);
-	if (err) {
-		pr_err("timed out waiting for host_int_status\n");
-		return err;
-	}
-
-	/* Ask the device how many bytes of firmware it wants. */
-	err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len);
-	if (err)
-		return err;
-
-	if (len > IF_SPI_CMD_BUF_SIZE) {
-		pr_err("firmware load device requested a larger transfer than we are prepared to handle (len = %d)\n",
-		       len);
-		return -EIO;
-	}
-	if (len & 0x1) {
-		lbs_deb_spi("%s: crc error\n", __func__);
-		len &= ~0x1;
-		*crc_err = 1;
-	} else
-		*crc_err = 0;
-
-	return len;
-}
-
-static int if_spi_prog_main_firmware(struct if_spi_card *card,
-					const struct firmware *firmware)
-{
-	struct lbs_private *priv = card->priv;
-	int len, prev_len;
-	int bytes, crc_err = 0, err = 0;
-	const u8 *fw;
-	u16 num_crc_errs;
-
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	err = spu_set_interrupt_mode(card, 1, 0);
-	if (err)
-		goto out;
-
-	err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0);
-	if (err) {
-		netdev_err(priv->dev,
-			   "%s: timed out waiting for initial scratch reg = 0\n",
-			   __func__);
-		goto out;
-	}
-
-	num_crc_errs = 0;
-	prev_len = 0;
-	bytes = firmware->size;
-	fw = firmware->data;
-	while ((len = if_spi_prog_main_firmware_check_len(card, &crc_err))) {
-		if (len < 0) {
-			err = len;
-			goto out;
-		}
-		if (bytes < 0) {
-			/*
-			 * If there are no more bytes left, we would normally
-			 * expect to have terminated with len = 0
-			 */
-			netdev_err(priv->dev,
-				   "Firmware load wants more bytes than we have to offer.\n");
-			break;
-		}
-		if (crc_err) {
-			/* Previous transfer failed. */
-			if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) {
-				pr_err("Too many CRC errors encountered in firmware load.\n");
-				err = -EIO;
-				goto out;
-			}
-		} else {
-			/* Previous transfer succeeded. Advance counters. */
-			bytes -= prev_len;
-			fw += prev_len;
-		}
-		if (bytes < len) {
-			memset(card->cmd_buffer, 0, len);
-			memcpy(card->cmd_buffer, fw, bytes);
-		} else
-			memcpy(card->cmd_buffer, fw, len);
-
-		err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG, 0);
-		if (err)
-			goto out;
-		err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG,
-				card->cmd_buffer, len);
-		if (err)
-			goto out;
-		err = spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG ,
-					IF_SPI_CIC_CMD_DOWNLOAD_OVER);
-		if (err)
-			goto out;
-		prev_len = len;
-	}
-	if (bytes > prev_len) {
-		pr_err("firmware load wants fewer bytes than we have to offer\n");
-	}
-
-	/* Confirm firmware download */
-	err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG,
-					SUCCESSFUL_FW_DOWNLOAD_MAGIC);
-	if (err) {
-		pr_err("failed to confirm the firmware download\n");
-		goto out;
-	}
-
-out:
-	if (err)
-		pr_err("failed to load firmware (err=%d)\n", err);
-	lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err);
-	return err;
-}
-
-/*
- * SPI Transfer Thread
- *
- * The SPI worker handles all SPI transfers, so there is no need for a lock.
- */
-
-/* Move a command from the card to the host */
-static int if_spi_c2h_cmd(struct if_spi_card *card)
-{
-	struct lbs_private *priv = card->priv;
-	unsigned long flags;
-	int err = 0;
-	u16 len;
-	u8 i;
-
-	/*
-	 * We need a buffer big enough to handle whatever people send to
-	 * hw_host_to_card
-	 */
-	BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE);
-	BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE);
-
-	/*
-	 * It's just annoying if the buffer size isn't a multiple of 4, because
-	 * then we might have len < IF_SPI_CMD_BUF_SIZE but
-	 * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE
-	 */
-	BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0);
-
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	/* How many bytes are there to read? */
-	err = spu_read_u16(card, IF_SPI_SCRATCH_2_REG, &len);
-	if (err)
-		goto out;
-	if (!len) {
-		netdev_err(priv->dev, "%s: error: card has no data for host\n",
-			   __func__);
-		err = -EINVAL;
-		goto out;
-	} else if (len > IF_SPI_CMD_BUF_SIZE) {
-		netdev_err(priv->dev,
-			   "%s: error: response packet too large: %d bytes, but maximum is %d\n",
-			   __func__, len, IF_SPI_CMD_BUF_SIZE);
-		err = -EINVAL;
-		goto out;
-	}
-
-	/* Read the data from the WLAN module into our command buffer */
-	err = spu_read(card, IF_SPI_CMD_RDWRPORT_REG,
-				card->cmd_buffer, ALIGN(len, 4));
-	if (err)
-		goto out;
-
-	spin_lock_irqsave(&priv->driver_lock, flags);
-	i = (priv->resp_idx == 0) ? 1 : 0;
-	BUG_ON(priv->resp_len[i]);
-	priv->resp_len[i] = len;
-	memcpy(priv->resp_buf[i], card->cmd_buffer, len);
-	lbs_notify_command_response(priv, i);
-	spin_unlock_irqrestore(&priv->driver_lock, flags);
-
-out:
-	if (err)
-		netdev_err(priv->dev, "%s: err=%d\n", __func__, err);
-	lbs_deb_leave(LBS_DEB_SPI);
-	return err;
-}
-
-/* Move data from the card to the host */
-static int if_spi_c2h_data(struct if_spi_card *card)
-{
-	struct lbs_private *priv = card->priv;
-	struct sk_buff *skb;
-	char *data;
-	u16 len;
-	int err = 0;
-
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	/* How many bytes are there to read? */
-	err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len);
-	if (err)
-		goto out;
-	if (!len) {
-		netdev_err(priv->dev, "%s: error: card has no data for host\n",
-			   __func__);
-		err = -EINVAL;
-		goto out;
-	} else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
-		netdev_err(priv->dev,
-			   "%s: error: card has %d bytes of data, but our maximum skb size is %zu\n",
-			   __func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
-		err = -EINVAL;
-		goto out;
-	}
-
-	/* TODO: should we allocate a smaller skb if we have less data? */
-	skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
-	if (!skb) {
-		err = -ENOBUFS;
-		goto out;
-	}
-	skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
-	data = skb_put(skb, len);
-
-	/* Read the data from the WLAN module into our skb... */
-	err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4));
-	if (err)
-		goto free_skb;
-
-	/* pass the SKB to libertas */
-	err = lbs_process_rxed_packet(card->priv, skb);
-	if (err)
-		goto free_skb;
-
-	/* success */
-	goto out;
-
-free_skb:
-	dev_kfree_skb(skb);
-out:
-	if (err)
-		netdev_err(priv->dev, "%s: err=%d\n", __func__, err);
-	lbs_deb_leave(LBS_DEB_SPI);
-	return err;
-}
-
-/* Move data or a command from the host to the card. */
-static void if_spi_h2c(struct if_spi_card *card,
-			struct if_spi_packet *packet, int type)
-{
-	struct lbs_private *priv = card->priv;
-	int err = 0;
-	u16 int_type, port_reg;
-
-	switch (type) {
-	case MVMS_DAT:
-		int_type = IF_SPI_CIC_TX_DOWNLOAD_OVER;
-		port_reg = IF_SPI_DATA_RDWRPORT_REG;
-		break;
-	case MVMS_CMD:
-		int_type = IF_SPI_CIC_CMD_DOWNLOAD_OVER;
-		port_reg = IF_SPI_CMD_RDWRPORT_REG;
-		break;
-	default:
-		netdev_err(priv->dev, "can't transfer buffer of type %d\n",
-			   type);
-		err = -EINVAL;
-		goto out;
-	}
-
-	/* Write the data to the card */
-	err = spu_write(card, port_reg, packet->buffer, packet->blen);
-	if (err)
-		goto out;
-
-out:
-	kfree(packet);
-
-	if (err)
-		netdev_err(priv->dev, "%s: error %d\n", __func__, err);
-}
-
-/* Inform the host about a card event */
-static void if_spi_e2h(struct if_spi_card *card)
-{
-	int err = 0;
-	u32 cause;
-	struct lbs_private *priv = card->priv;
-
-	err = spu_read_u32(card, IF_SPI_SCRATCH_3_REG, &cause);
-	if (err)
-		goto out;
-
-	/* re-enable the card event interrupt */
-	spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG,
-			~IF_SPI_HICU_CARD_EVENT);
-
-	/* generate a card interrupt */
-	spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT);
-
-	lbs_queue_event(priv, cause & 0xff);
-out:
-	if (err)
-		netdev_err(priv->dev, "%s: error %d\n", __func__, err);
-}
-
-static void if_spi_host_to_card_worker(struct work_struct *work)
-{
-	int err;
-	struct if_spi_card *card;
-	u16 hiStatus;
-	unsigned long flags;
-	struct if_spi_packet *packet;
-	struct lbs_private *priv;
-
-	card = container_of(work, struct if_spi_card, packet_work);
-	priv = card->priv;
-
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	/*
-	 * Read the host interrupt status register to see what we
-	 * can do.
-	 */
-	err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG,
-				&hiStatus);
-	if (err) {
-		netdev_err(priv->dev, "I/O error\n");
-		goto err;
-	}
-
-	if (hiStatus & IF_SPI_HIST_CMD_UPLOAD_RDY) {
-		err = if_spi_c2h_cmd(card);
-		if (err)
-			goto err;
-	}
-	if (hiStatus & IF_SPI_HIST_RX_UPLOAD_RDY) {
-		err = if_spi_c2h_data(card);
-		if (err)
-			goto err;
-	}
-
-	/*
-	 * workaround: in PS mode, the card does not set the Command
-	 * Download Ready bit, but it sets TX Download Ready.
-	 */
-	if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY ||
-	   (card->priv->psstate != PS_STATE_FULL_POWER &&
-	    (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) {
-		/*
-		 * This means two things. First of all,
-		 * if there was a previous command sent, the card has
-		 * successfully received it.
-		 * Secondly, it is now ready to download another
-		 * command.
-		 */
-		lbs_host_to_card_done(card->priv);
-
-		/* Do we have any command packets from the host to send? */
-		packet = NULL;
-		spin_lock_irqsave(&card->buffer_lock, flags);
-		if (!list_empty(&card->cmd_packet_list)) {
-			packet = (struct if_spi_packet *)(card->
-					cmd_packet_list.next);
-			list_del(&packet->list);
-		}
-		spin_unlock_irqrestore(&card->buffer_lock, flags);
-
-		if (packet)
-			if_spi_h2c(card, packet, MVMS_CMD);
-	}
-	if (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY) {
-		/* Do we have any data packets from the host to send? */
-		packet = NULL;
-		spin_lock_irqsave(&card->buffer_lock, flags);
-		if (!list_empty(&card->data_packet_list)) {
-			packet = (struct if_spi_packet *)(card->
-					data_packet_list.next);
-			list_del(&packet->list);
-		}
-		spin_unlock_irqrestore(&card->buffer_lock, flags);
-
-		if (packet)
-			if_spi_h2c(card, packet, MVMS_DAT);
-	}
-	if (hiStatus & IF_SPI_HIST_CARD_EVENT)
-		if_spi_e2h(card);
-
-err:
-	if (err)
-		netdev_err(priv->dev, "%s: got error %d\n", __func__, err);
-
-	lbs_deb_leave(LBS_DEB_SPI);
-}
-
-/*
- * Host to Card
- *
- * Called from Libertas to transfer some data to the WLAN device
- * We can't sleep here.
- */
-static int if_spi_host_to_card(struct lbs_private *priv,
-				u8 type, u8 *buf, u16 nb)
-{
-	int err = 0;
-	unsigned long flags;
-	struct if_spi_card *card = priv->card;
-	struct if_spi_packet *packet;
-	u16 blen;
-
-	lbs_deb_enter_args(LBS_DEB_SPI, "type %d, bytes %d", type, nb);
-
-	if (nb == 0) {
-		netdev_err(priv->dev, "%s: invalid size requested: %d\n",
-			   __func__, nb);
-		err = -EINVAL;
-		goto out;
-	}
-	blen = ALIGN(nb, 4);
-	packet = kzalloc(sizeof(struct if_spi_packet) + blen, GFP_ATOMIC);
-	if (!packet) {
-		err = -ENOMEM;
-		goto out;
-	}
-	packet->blen = blen;
-	memcpy(packet->buffer, buf, nb);
-	memset(packet->buffer + nb, 0, blen - nb);
-
-	switch (type) {
-	case MVMS_CMD:
-		priv->dnld_sent = DNLD_CMD_SENT;
-		spin_lock_irqsave(&card->buffer_lock, flags);
-		list_add_tail(&packet->list, &card->cmd_packet_list);
-		spin_unlock_irqrestore(&card->buffer_lock, flags);
-		break;
-	case MVMS_DAT:
-		priv->dnld_sent = DNLD_DATA_SENT;
-		spin_lock_irqsave(&card->buffer_lock, flags);
-		list_add_tail(&packet->list, &card->data_packet_list);
-		spin_unlock_irqrestore(&card->buffer_lock, flags);
-		break;
-	default:
-		kfree(packet);
-		netdev_err(priv->dev, "can't transfer buffer of type %d\n",
-			   type);
-		err = -EINVAL;
-		break;
-	}
-
-	/* Queue spi xfer work */
-	queue_work(card->workqueue, &card->packet_work);
-out:
-	lbs_deb_leave_args(LBS_DEB_SPI, "err=%d", err);
-	return err;
-}
-
-/*
- * Host Interrupts
- *
- * Service incoming interrupts from the WLAN device. We can't sleep here, so
- * don't try to talk on the SPI bus, just queue the SPI xfer work.
- */
-static irqreturn_t if_spi_host_interrupt(int irq, void *dev_id)
-{
-	struct if_spi_card *card = dev_id;
-
-	queue_work(card->workqueue, &card->packet_work);
-
-	return IRQ_HANDLED;
-}
-
-/*
- * SPI callbacks
- */
-
-static int if_spi_init_card(struct if_spi_card *card)
-{
-	struct lbs_private *priv = card->priv;
-	int err, i;
-	u32 scratch;
-	const struct firmware *helper = NULL;
-	const struct firmware *mainfw = NULL;
-
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	err = spu_init(card, card->pdata->use_dummy_writes);
-	if (err)
-		goto out;
-	err = spu_get_chip_revision(card, &card->card_id, &card->card_rev);
-	if (err)
-		goto out;
-
-	err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch);
-	if (err)
-		goto out;
-	if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC)
-		lbs_deb_spi("Firmware is already loaded for "
-			    "Marvell WLAN 802.11 adapter\n");
-	else {
-		/* Check if we support this card */
-		for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
-			if (card->card_id == fw_table[i].model)
-				break;
-		}
-		if (i == ARRAY_SIZE(fw_table)) {
-			netdev_err(priv->dev, "Unsupported chip_id: 0x%02x\n",
-				   card->card_id);
-			err = -ENODEV;
-			goto out;
-		}
-
-		err = lbs_get_firmware(&card->spi->dev, card->card_id,
-					&fw_table[0], &helper, &mainfw);
-		if (err) {
-			netdev_err(priv->dev, "failed to find firmware (%d)\n",
-				   err);
-			goto out;
-		}
-
-		lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter "
-				"(chip_id = 0x%04x, chip_rev = 0x%02x) "
-				"attached to SPI bus_num %d, chip_select %d. "
-				"spi->max_speed_hz=%d\n",
-				card->card_id, card->card_rev,
-				card->spi->master->bus_num,
-				card->spi->chip_select,
-				card->spi->max_speed_hz);
-		err = if_spi_prog_helper_firmware(card, helper);
-		if (err)
-			goto out;
-		err = if_spi_prog_main_firmware(card, mainfw);
-		if (err)
-			goto out;
-		lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n");
-	}
-
-	err = spu_set_interrupt_mode(card, 0, 1);
-	if (err)
-		goto out;
-
-out:
-	lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err);
-	return err;
-}
-
-static void if_spi_resume_worker(struct work_struct *work)
-{
-	struct if_spi_card *card;
-
-	card = container_of(work, struct if_spi_card, resume_work);
-
-	if (card->suspended) {
-		if (card->pdata->setup)
-			card->pdata->setup(card->spi);
-
-		/* Init card ... */
-		if_spi_init_card(card);
-
-		enable_irq(card->spi->irq);
-
-		/* And resume it ... */
-		lbs_resume(card->priv);
-
-		card->suspended = 0;
-	}
-}
-
-static int if_spi_probe(struct spi_device *spi)
-{
-	struct if_spi_card *card;
-	struct lbs_private *priv = NULL;
-	struct libertas_spi_platform_data *pdata = dev_get_platdata(&spi->dev);
-	int err = 0;
-
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	if (!pdata) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	if (pdata->setup) {
-		err = pdata->setup(spi);
-		if (err)
-			goto out;
-	}
-
-	/* Allocate card structure to represent this specific device */
-	card = kzalloc(sizeof(struct if_spi_card), GFP_KERNEL);
-	if (!card) {
-		err = -ENOMEM;
-		goto teardown;
-	}
-	spi_set_drvdata(spi, card);
-	card->pdata = pdata;
-	card->spi = spi;
-	card->prev_xfer_time = jiffies;
-
-	INIT_LIST_HEAD(&card->cmd_packet_list);
-	INIT_LIST_HEAD(&card->data_packet_list);
-	spin_lock_init(&card->buffer_lock);
-
-	/* Initialize the SPI Interface Unit */
-
-	/* Firmware load */
-	err = if_spi_init_card(card);
-	if (err)
-		goto free_card;
-
-	/*
-	 * Register our card with libertas.
-	 * This will call alloc_etherdev.
-	 */
-	priv = lbs_add_card(card, &spi->dev);
-	if (!priv) {
-		err = -ENOMEM;
-		goto free_card;
-	}
-	card->priv = priv;
-	priv->setup_fw_on_resume = 1;
-	priv->card = card;
-	priv->hw_host_to_card = if_spi_host_to_card;
-	priv->enter_deep_sleep = NULL;
-	priv->exit_deep_sleep = NULL;
-	priv->reset_deep_sleep_wakeup = NULL;
-	priv->fw_ready = 1;
-
-	/* Initialize interrupt handling stuff. */
-	card->workqueue = create_workqueue("libertas_spi");
-	INIT_WORK(&card->packet_work, if_spi_host_to_card_worker);
-	INIT_WORK(&card->resume_work, if_spi_resume_worker);
-
-	err = request_irq(spi->irq, if_spi_host_interrupt,
-			IRQF_TRIGGER_FALLING, "libertas_spi", card);
-	if (err) {
-		pr_err("can't get host irq line-- request_irq failed\n");
-		goto terminate_workqueue;
-	}
-
-	/*
-	 * Start the card.
-	 * This will call register_netdev, and we'll start
-	 * getting interrupts...
-	 */
-	err = lbs_start_card(priv);
-	if (err)
-		goto release_irq;
-
-	lbs_deb_spi("Finished initializing WLAN module.\n");
-
-	/* successful exit */
-	goto out;
-
-release_irq:
-	free_irq(spi->irq, card);
-terminate_workqueue:
-	flush_workqueue(card->workqueue);
-	destroy_workqueue(card->workqueue);
-	lbs_remove_card(priv); /* will call free_netdev */
-free_card:
-	free_if_spi_card(card);
-teardown:
-	if (pdata->teardown)
-		pdata->teardown(spi);
-out:
-	lbs_deb_leave_args(LBS_DEB_SPI, "err %d\n", err);
-	return err;
-}
-
-static int libertas_spi_remove(struct spi_device *spi)
-{
-	struct if_spi_card *card = spi_get_drvdata(spi);
-	struct lbs_private *priv = card->priv;
-
-	lbs_deb_spi("libertas_spi_remove\n");
-	lbs_deb_enter(LBS_DEB_SPI);
-
-	cancel_work_sync(&card->resume_work);
-
-	lbs_stop_card(priv);
-	lbs_remove_card(priv); /* will call free_netdev */
-
-	free_irq(spi->irq, card);
-	flush_workqueue(card->workqueue);
-	destroy_workqueue(card->workqueue);
-	if (card->pdata->teardown)
-		card->pdata->teardown(spi);
-	free_if_spi_card(card);
-	lbs_deb_leave(LBS_DEB_SPI);
-	return 0;
-}
-
-static int if_spi_suspend(struct device *dev)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	struct if_spi_card *card = spi_get_drvdata(spi);
-
-	if (!card->suspended) {
-		lbs_suspend(card->priv);
-		flush_workqueue(card->workqueue);
-		disable_irq(spi->irq);
-
-		if (card->pdata->teardown)
-			card->pdata->teardown(spi);
-		card->suspended = 1;
-	}
-
-	return 0;
-}
-
-static int if_spi_resume(struct device *dev)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	struct if_spi_card *card = spi_get_drvdata(spi);
-
-	/* Schedule delayed work */
-	schedule_work(&card->resume_work);
-
-	return 0;
-}
-
-static const struct dev_pm_ops if_spi_pm_ops = {
-	.suspend	= if_spi_suspend,
-	.resume		= if_spi_resume,
-};
-
-static struct spi_driver libertas_spi_driver = {
-	.probe	= if_spi_probe,
-	.remove = libertas_spi_remove,
-	.driver = {
-		.name	= "libertas_spi",
-		.pm	= &if_spi_pm_ops,
-	},
-};
-
-/*
- * Module functions
- */
-
-static int __init if_spi_init_module(void)
-{
-	int ret = 0;
-	lbs_deb_enter(LBS_DEB_SPI);
-	printk(KERN_INFO "libertas_spi: Libertas SPI driver\n");
-	ret = spi_register_driver(&libertas_spi_driver);
-	lbs_deb_leave(LBS_DEB_SPI);
-	return ret;
-}
-
-static void __exit if_spi_exit_module(void)
-{
-	lbs_deb_enter(LBS_DEB_SPI);
-	spi_unregister_driver(&libertas_spi_driver);
-	lbs_deb_leave(LBS_DEB_SPI);
-}
-
-module_init(if_spi_init_module);
-module_exit(if_spi_exit_module);
-
-MODULE_DESCRIPTION("Libertas SPI WLAN Driver");
-MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, "
-	      "Colin McCabe <colin@cozybit.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("spi:libertas_spi");