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, 721 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/p54/p54spi.c b/kernel/drivers/net/wireless/p54/p54spi.c
new file mode 100644
index 000000000..63de5eed2
--- /dev/null
+++ b/kernel/drivers/net/wireless/p54/p54spi.c
@@ -0,0 +1,721 @@
+/*
+ * Copyright (C) 2008 Christian Lamparter <chunkeey@web.de>
+ * Copyright 2008       Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This driver is a port from stlc45xx:
+ *	Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/firmware.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/spi/spi.h>
+#include <linux/etherdevice.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+
+#include "p54spi.h"
+#include "p54.h"
+
+#include "lmac.h"
+
+#ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
+#include "p54spi_eeprom.h"
+#endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */
+
+MODULE_FIRMWARE("3826.arm");
+
+/* gpios should be handled in board files and provided via platform data,
+ * but because it's currently impossible for p54spi to have a header file
+ * in include/linux, let's use module paramaters for now
+ */
+
+static int p54spi_gpio_power = 97;
+module_param(p54spi_gpio_power, int, 0444);
+MODULE_PARM_DESC(p54spi_gpio_power, "gpio number for power line");
+
+static int p54spi_gpio_irq = 87;
+module_param(p54spi_gpio_irq, int, 0444);
+MODULE_PARM_DESC(p54spi_gpio_irq, "gpio number for irq line");
+
+static void p54spi_spi_read(struct p54s_priv *priv, u8 address,
+			      void *buf, size_t len)
+{
+	struct spi_transfer t[2];
+	struct spi_message m;
+	__le16 addr;
+
+	/* We first push the address */
+	addr = cpu_to_le16(address << 8 | SPI_ADRS_READ_BIT_15);
+
+	spi_message_init(&m);
+	memset(t, 0, sizeof(t));
+
+	t[0].tx_buf = &addr;
+	t[0].len = sizeof(addr);
+	spi_message_add_tail(&t[0], &m);
+
+	t[1].rx_buf = buf;
+	t[1].len = len;
+	spi_message_add_tail(&t[1], &m);
+
+	spi_sync(priv->spi, &m);
+}
+
+
+static void p54spi_spi_write(struct p54s_priv *priv, u8 address,
+			     const void *buf, size_t len)
+{
+	struct spi_transfer t[3];
+	struct spi_message m;
+	__le16 addr;
+
+	/* We first push the address */
+	addr = cpu_to_le16(address << 8);
+
+	spi_message_init(&m);
+	memset(t, 0, sizeof(t));
+
+	t[0].tx_buf = &addr;
+	t[0].len = sizeof(addr);
+	spi_message_add_tail(&t[0], &m);
+
+	t[1].tx_buf = buf;
+	t[1].len = len & ~1;
+	spi_message_add_tail(&t[1], &m);
+
+	if (len % 2) {
+		__le16 last_word;
+		last_word = cpu_to_le16(((u8 *)buf)[len - 1]);
+
+		t[2].tx_buf = &last_word;
+		t[2].len = sizeof(last_word);
+		spi_message_add_tail(&t[2], &m);
+	}
+
+	spi_sync(priv->spi, &m);
+}
+
+static u32 p54spi_read32(struct p54s_priv *priv, u8 addr)
+{
+	__le32 val;
+
+	p54spi_spi_read(priv, addr, &val, sizeof(val));
+
+	return le32_to_cpu(val);
+}
+
+static inline void p54spi_write16(struct p54s_priv *priv, u8 addr, __le16 val)
+{
+	p54spi_spi_write(priv, addr, &val, sizeof(val));
+}
+
+static inline void p54spi_write32(struct p54s_priv *priv, u8 addr, __le32 val)
+{
+	p54spi_spi_write(priv, addr, &val, sizeof(val));
+}
+
+static int p54spi_wait_bit(struct p54s_priv *priv, u16 reg, u32 bits)
+{
+	int i;
+
+	for (i = 0; i < 2000; i++) {
+		u32 buffer = p54spi_read32(priv, reg);
+		if ((buffer & bits) == bits)
+			return 1;
+	}
+	return 0;
+}
+
+static int p54spi_spi_write_dma(struct p54s_priv *priv, __le32 base,
+				const void *buf, size_t len)
+{
+	if (!p54spi_wait_bit(priv, SPI_ADRS_DMA_WRITE_CTRL, HOST_ALLOWED)) {
+		dev_err(&priv->spi->dev, "spi_write_dma not allowed "
+			"to DMA write.\n");
+		return -EAGAIN;
+	}
+
+	p54spi_write16(priv, SPI_ADRS_DMA_WRITE_CTRL,
+		       cpu_to_le16(SPI_DMA_WRITE_CTRL_ENABLE));
+
+	p54spi_write16(priv, SPI_ADRS_DMA_WRITE_LEN, cpu_to_le16(len));
+	p54spi_write32(priv, SPI_ADRS_DMA_WRITE_BASE, base);
+	p54spi_spi_write(priv, SPI_ADRS_DMA_DATA, buf, len);
+	return 0;
+}
+
+static int p54spi_request_firmware(struct ieee80211_hw *dev)
+{
+	struct p54s_priv *priv = dev->priv;
+	int ret;
+
+	/* FIXME: should driver use it's own struct device? */
+	ret = request_firmware(&priv->firmware, "3826.arm", &priv->spi->dev);
+
+	if (ret < 0) {
+		dev_err(&priv->spi->dev, "request_firmware() failed: %d", ret);
+		return ret;
+	}
+
+	ret = p54_parse_firmware(dev, priv->firmware);
+	if (ret) {
+		release_firmware(priv->firmware);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int p54spi_request_eeprom(struct ieee80211_hw *dev)
+{
+	struct p54s_priv *priv = dev->priv;
+	const struct firmware *eeprom;
+	int ret;
+
+	/* allow users to customize their eeprom.
+	 */
+
+	ret = request_firmware_direct(&eeprom, "3826.eeprom", &priv->spi->dev);
+	if (ret < 0) {
+#ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
+		dev_info(&priv->spi->dev, "loading default eeprom...\n");
+		ret = p54_parse_eeprom(dev, (void *) p54spi_eeprom,
+				       sizeof(p54spi_eeprom));
+#else
+		dev_err(&priv->spi->dev, "Failed to request user eeprom\n");
+#endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */
+	} else {
+		dev_info(&priv->spi->dev, "loading user eeprom...\n");
+		ret = p54_parse_eeprom(dev, (void *) eeprom->data,
+				       (int)eeprom->size);
+		release_firmware(eeprom);
+	}
+	return ret;
+}
+
+static int p54spi_upload_firmware(struct ieee80211_hw *dev)
+{
+	struct p54s_priv *priv = dev->priv;
+	unsigned long fw_len, _fw_len;
+	unsigned int offset = 0;
+	int err = 0;
+	u8 *fw;
+
+	fw_len = priv->firmware->size;
+	fw = kmemdup(priv->firmware->data, fw_len, GFP_KERNEL);
+	if (!fw)
+		return -ENOMEM;
+
+	/* stop the device */
+	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
+		       SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
+		       SPI_CTRL_STAT_START_HALTED));
+
+	msleep(TARGET_BOOT_SLEEP);
+
+	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
+		       SPI_CTRL_STAT_HOST_OVERRIDE |
+		       SPI_CTRL_STAT_START_HALTED));
+
+	msleep(TARGET_BOOT_SLEEP);
+
+	while (fw_len > 0) {
+		_fw_len = min_t(long, fw_len, SPI_MAX_PACKET_SIZE);
+
+		err = p54spi_spi_write_dma(priv, cpu_to_le32(
+					   ISL38XX_DEV_FIRMWARE_ADDR + offset),
+					   (fw + offset), _fw_len);
+		if (err < 0)
+			goto out;
+
+		fw_len -= _fw_len;
+		offset += _fw_len;
+	}
+
+	BUG_ON(fw_len != 0);
+
+	/* enable host interrupts */
+	p54spi_write32(priv, SPI_ADRS_HOST_INT_EN,
+		       cpu_to_le32(SPI_HOST_INTS_DEFAULT));
+
+	/* boot the device */
+	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
+		       SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
+		       SPI_CTRL_STAT_RAM_BOOT));
+
+	msleep(TARGET_BOOT_SLEEP);
+
+	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
+		       SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_RAM_BOOT));
+	msleep(TARGET_BOOT_SLEEP);
+
+out:
+	kfree(fw);
+	return err;
+}
+
+static void p54spi_power_off(struct p54s_priv *priv)
+{
+	disable_irq(gpio_to_irq(p54spi_gpio_irq));
+	gpio_set_value(p54spi_gpio_power, 0);
+}
+
+static void p54spi_power_on(struct p54s_priv *priv)
+{
+	gpio_set_value(p54spi_gpio_power, 1);
+	enable_irq(gpio_to_irq(p54spi_gpio_irq));
+
+	/* need to wait a while before device can be accessed, the length
+	 * is just a guess
+	 */
+	msleep(10);
+}
+
+static inline void p54spi_int_ack(struct p54s_priv *priv, u32 val)
+{
+	p54spi_write32(priv, SPI_ADRS_HOST_INT_ACK, cpu_to_le32(val));
+}
+
+static int p54spi_wakeup(struct p54s_priv *priv)
+{
+	/* wake the chip */
+	p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
+		       cpu_to_le32(SPI_TARGET_INT_WAKEUP));
+
+	/* And wait for the READY interrupt */
+	if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS,
+			     SPI_HOST_INT_READY)) {
+		dev_err(&priv->spi->dev, "INT_READY timeout\n");
+		return -EBUSY;
+	}
+
+	p54spi_int_ack(priv, SPI_HOST_INT_READY);
+	return 0;
+}
+
+static inline void p54spi_sleep(struct p54s_priv *priv)
+{
+	p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
+		       cpu_to_le32(SPI_TARGET_INT_SLEEP));
+}
+
+static void p54spi_int_ready(struct p54s_priv *priv)
+{
+	p54spi_write32(priv, SPI_ADRS_HOST_INT_EN, cpu_to_le32(
+		       SPI_HOST_INT_UPDATE | SPI_HOST_INT_SW_UPDATE));
+
+	switch (priv->fw_state) {
+	case FW_STATE_BOOTING:
+		priv->fw_state = FW_STATE_READY;
+		complete(&priv->fw_comp);
+		break;
+	case FW_STATE_RESETTING:
+		priv->fw_state = FW_STATE_READY;
+		/* TODO: reinitialize state */
+		break;
+	default:
+		break;
+	}
+}
+
+static int p54spi_rx(struct p54s_priv *priv)
+{
+	struct sk_buff *skb;
+	u16 len;
+	u16 rx_head[2];
+#define READAHEAD_SZ (sizeof(rx_head)-sizeof(u16))
+
+	if (p54spi_wakeup(priv) < 0)
+		return -EBUSY;
+
+	/* Read data size and first data word in one SPI transaction
+	 * This is workaround for firmware/DMA bug,
+	 * when first data word gets lost under high load.
+	 */
+	p54spi_spi_read(priv, SPI_ADRS_DMA_DATA, rx_head, sizeof(rx_head));
+	len = rx_head[0];
+
+	if (len == 0) {
+		p54spi_sleep(priv);
+		dev_err(&priv->spi->dev, "rx request of zero bytes\n");
+		return 0;
+	}
+
+	/* Firmware may insert up to 4 padding bytes after the lmac header,
+	 * but it does not amend the size of SPI data transfer.
+	 * Such packets has correct data size in header, thus referencing
+	 * past the end of allocated skb. Reserve extra 4 bytes for this case
+	 */
+	skb = dev_alloc_skb(len + 4);
+	if (!skb) {
+		p54spi_sleep(priv);
+		dev_err(&priv->spi->dev, "could not alloc skb");
+		return -ENOMEM;
+	}
+
+	if (len <= READAHEAD_SZ) {
+		memcpy(skb_put(skb, len), rx_head + 1, len);
+	} else {
+		memcpy(skb_put(skb, READAHEAD_SZ), rx_head + 1, READAHEAD_SZ);
+		p54spi_spi_read(priv, SPI_ADRS_DMA_DATA,
+				skb_put(skb, len - READAHEAD_SZ),
+				len - READAHEAD_SZ);
+	}
+	p54spi_sleep(priv);
+	/* Put additional bytes to compensate for the possible
+	 * alignment-caused truncation
+	 */
+	skb_put(skb, 4);
+
+	if (p54_rx(priv->hw, skb) == 0)
+		dev_kfree_skb(skb);
+
+	return 0;
+}
+
+
+static irqreturn_t p54spi_interrupt(int irq, void *config)
+{
+	struct spi_device *spi = config;
+	struct p54s_priv *priv = spi_get_drvdata(spi);
+
+	ieee80211_queue_work(priv->hw, &priv->work);
+
+	return IRQ_HANDLED;
+}
+
+static int p54spi_tx_frame(struct p54s_priv *priv, struct sk_buff *skb)
+{
+	struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
+	int ret = 0;
+
+	if (p54spi_wakeup(priv) < 0)
+		return -EBUSY;
+
+	ret = p54spi_spi_write_dma(priv, hdr->req_id, skb->data, skb->len);
+	if (ret < 0)
+		goto out;
+
+	if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS,
+			     SPI_HOST_INT_WR_READY)) {
+		dev_err(&priv->spi->dev, "WR_READY timeout\n");
+		ret = -EAGAIN;
+		goto out;
+	}
+
+	p54spi_int_ack(priv, SPI_HOST_INT_WR_READY);
+
+	if (FREE_AFTER_TX(skb))
+		p54_free_skb(priv->hw, skb);
+out:
+	p54spi_sleep(priv);
+	return ret;
+}
+
+static int p54spi_wq_tx(struct p54s_priv *priv)
+{
+	struct p54s_tx_info *entry;
+	struct sk_buff *skb;
+	struct ieee80211_tx_info *info;
+	struct p54_tx_info *minfo;
+	struct p54s_tx_info *dinfo;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&priv->tx_lock, flags);
+
+	while (!list_empty(&priv->tx_pending)) {
+		entry = list_entry(priv->tx_pending.next,
+				   struct p54s_tx_info, tx_list);
+
+		list_del_init(&entry->tx_list);
+
+		spin_unlock_irqrestore(&priv->tx_lock, flags);
+
+		dinfo = container_of((void *) entry, struct p54s_tx_info,
+				     tx_list);
+		minfo = container_of((void *) dinfo, struct p54_tx_info,
+				     data);
+		info = container_of((void *) minfo, struct ieee80211_tx_info,
+				    rate_driver_data);
+		skb = container_of((void *) info, struct sk_buff, cb);
+
+		ret = p54spi_tx_frame(priv, skb);
+
+		if (ret < 0) {
+			p54_free_skb(priv->hw, skb);
+			return ret;
+		}
+
+		spin_lock_irqsave(&priv->tx_lock, flags);
+	}
+	spin_unlock_irqrestore(&priv->tx_lock, flags);
+	return ret;
+}
+
+static void p54spi_op_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+	struct p54s_priv *priv = dev->priv;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct p54_tx_info *mi = (struct p54_tx_info *) info->rate_driver_data;
+	struct p54s_tx_info *di = (struct p54s_tx_info *) mi->data;
+	unsigned long flags;
+
+	BUILD_BUG_ON(sizeof(*di) > sizeof((mi->data)));
+
+	spin_lock_irqsave(&priv->tx_lock, flags);
+	list_add_tail(&di->tx_list, &priv->tx_pending);
+	spin_unlock_irqrestore(&priv->tx_lock, flags);
+
+	ieee80211_queue_work(priv->hw, &priv->work);
+}
+
+static void p54spi_work(struct work_struct *work)
+{
+	struct p54s_priv *priv = container_of(work, struct p54s_priv, work);
+	u32 ints;
+	int ret;
+
+	mutex_lock(&priv->mutex);
+
+	if (priv->fw_state == FW_STATE_OFF)
+		goto out;
+
+	ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
+
+	if (ints & SPI_HOST_INT_READY) {
+		p54spi_int_ready(priv);
+		p54spi_int_ack(priv, SPI_HOST_INT_READY);
+	}
+
+	if (priv->fw_state != FW_STATE_READY)
+		goto out;
+
+	if (ints & SPI_HOST_INT_UPDATE) {
+		p54spi_int_ack(priv, SPI_HOST_INT_UPDATE);
+		ret = p54spi_rx(priv);
+		if (ret < 0)
+			goto out;
+	}
+	if (ints & SPI_HOST_INT_SW_UPDATE) {
+		p54spi_int_ack(priv, SPI_HOST_INT_SW_UPDATE);
+		ret = p54spi_rx(priv);
+		if (ret < 0)
+			goto out;
+	}
+
+	ret = p54spi_wq_tx(priv);
+out:
+	mutex_unlock(&priv->mutex);
+}
+
+static int p54spi_op_start(struct ieee80211_hw *dev)
+{
+	struct p54s_priv *priv = dev->priv;
+	unsigned long timeout;
+	int ret = 0;
+
+	if (mutex_lock_interruptible(&priv->mutex)) {
+		ret = -EINTR;
+		goto out;
+	}
+
+	priv->fw_state = FW_STATE_BOOTING;
+
+	p54spi_power_on(priv);
+
+	ret = p54spi_upload_firmware(dev);
+	if (ret < 0) {
+		p54spi_power_off(priv);
+		goto out_unlock;
+	}
+
+	mutex_unlock(&priv->mutex);
+
+	timeout = msecs_to_jiffies(2000);
+	timeout = wait_for_completion_interruptible_timeout(&priv->fw_comp,
+							    timeout);
+	if (!timeout) {
+		dev_err(&priv->spi->dev, "firmware boot failed");
+		p54spi_power_off(priv);
+		ret = -1;
+		goto out;
+	}
+
+	if (mutex_lock_interruptible(&priv->mutex)) {
+		ret = -EINTR;
+		p54spi_power_off(priv);
+		goto out;
+	}
+
+	WARN_ON(priv->fw_state != FW_STATE_READY);
+
+out_unlock:
+	mutex_unlock(&priv->mutex);
+
+out:
+	return ret;
+}
+
+static void p54spi_op_stop(struct ieee80211_hw *dev)
+{
+	struct p54s_priv *priv = dev->priv;
+	unsigned long flags;
+
+	mutex_lock(&priv->mutex);
+	WARN_ON(priv->fw_state != FW_STATE_READY);
+
+	p54spi_power_off(priv);
+	spin_lock_irqsave(&priv->tx_lock, flags);
+	INIT_LIST_HEAD(&priv->tx_pending);
+	spin_unlock_irqrestore(&priv->tx_lock, flags);
+
+	priv->fw_state = FW_STATE_OFF;
+	mutex_unlock(&priv->mutex);
+
+	cancel_work_sync(&priv->work);
+}
+
+static int p54spi_probe(struct spi_device *spi)
+{
+	struct p54s_priv *priv = NULL;
+	struct ieee80211_hw *hw;
+	int ret = -EINVAL;
+
+	hw = p54_init_common(sizeof(*priv));
+	if (!hw) {
+		dev_err(&spi->dev, "could not alloc ieee80211_hw");
+		return -ENOMEM;
+	}
+
+	priv = hw->priv;
+	priv->hw = hw;
+	spi_set_drvdata(spi, priv);
+	priv->spi = spi;
+
+	spi->bits_per_word = 16;
+	spi->max_speed_hz = 24000000;
+
+	ret = spi_setup(spi);
+	if (ret < 0) {
+		dev_err(&priv->spi->dev, "spi_setup failed");
+		goto err_free;
+	}
+
+	ret = gpio_request(p54spi_gpio_power, "p54spi power");
+	if (ret < 0) {
+		dev_err(&priv->spi->dev, "power GPIO request failed: %d", ret);
+		goto err_free;
+	}
+
+	ret = gpio_request(p54spi_gpio_irq, "p54spi irq");
+	if (ret < 0) {
+		dev_err(&priv->spi->dev, "irq GPIO request failed: %d", ret);
+		goto err_free_gpio_power;
+	}
+
+	gpio_direction_output(p54spi_gpio_power, 0);
+	gpio_direction_input(p54spi_gpio_irq);
+
+	ret = request_irq(gpio_to_irq(p54spi_gpio_irq),
+			  p54spi_interrupt, 0, "p54spi",
+			  priv->spi);
+	if (ret < 0) {
+		dev_err(&priv->spi->dev, "request_irq() failed");
+		goto err_free_gpio_irq;
+	}
+
+	irq_set_irq_type(gpio_to_irq(p54spi_gpio_irq), IRQ_TYPE_EDGE_RISING);
+
+	disable_irq(gpio_to_irq(p54spi_gpio_irq));
+
+	INIT_WORK(&priv->work, p54spi_work);
+	init_completion(&priv->fw_comp);
+	INIT_LIST_HEAD(&priv->tx_pending);
+	mutex_init(&priv->mutex);
+	spin_lock_init(&priv->tx_lock);
+	SET_IEEE80211_DEV(hw, &spi->dev);
+	priv->common.open = p54spi_op_start;
+	priv->common.stop = p54spi_op_stop;
+	priv->common.tx = p54spi_op_tx;
+
+	ret = p54spi_request_firmware(hw);
+	if (ret < 0)
+		goto err_free_common;
+
+	ret = p54spi_request_eeprom(hw);
+	if (ret)
+		goto err_free_common;
+
+	ret = p54_register_common(hw, &priv->spi->dev);
+	if (ret)
+		goto err_free_common;
+
+	return 0;
+
+err_free_common:
+	free_irq(gpio_to_irq(p54spi_gpio_irq), spi);
+err_free_gpio_irq:
+	gpio_free(p54spi_gpio_irq);
+err_free_gpio_power:
+	gpio_free(p54spi_gpio_power);
+err_free:
+	p54_free_common(priv->hw);
+	return ret;
+}
+
+static int p54spi_remove(struct spi_device *spi)
+{
+	struct p54s_priv *priv = spi_get_drvdata(spi);
+
+	p54_unregister_common(priv->hw);
+
+	free_irq(gpio_to_irq(p54spi_gpio_irq), spi);
+
+	gpio_free(p54spi_gpio_power);
+	gpio_free(p54spi_gpio_irq);
+	release_firmware(priv->firmware);
+
+	mutex_destroy(&priv->mutex);
+
+	p54_free_common(priv->hw);
+
+	return 0;
+}
+
+
+static struct spi_driver p54spi_driver = {
+	.driver = {
+		.name		= "p54spi",
+		.owner		= THIS_MODULE,
+	},
+
+	.probe		= p54spi_probe,
+	.remove		= p54spi_remove,
+};
+
+module_spi_driver(p54spi_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
+MODULE_ALIAS("spi:cx3110x");
+MODULE_ALIAS("spi:p54spi");
+MODULE_ALIAS("spi:stlc45xx");