Message-Id: <1263886761-23584-1-git-send-email-vapier@gentoo.org>
Date:	Tue, 19 Jan 2010 02:39:21 -0500
From:	Mike Frysinger <vapier@...too.org>
To:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>
Cc:	uclinux-dist-devel@...ckfin.uclinux.org,
	Michael Hennerich <michael.hennerich@...log.com>
Subject: [PATCH v2] wireless: adf702x: new driver for ADF7020/21 parts

From: Michael Hennerich <michael.hennerich@...log.com>

This is a driver for Analog Devices series of ADF702x Narrow-Band
Short-Range Radio Transceiver chipsets, including the ADF7021 and
the ADF7025.  This Ethernet like driver implements a custom
software PHY.

Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Mike Frysinger <vapier@...too.org>
---
v2
	- afaik, all the feedback thus far should be addressed

 drivers/net/Kconfig         |   11 +
 drivers/net/Makefile        |    1 +
 drivers/net/adf702x.c       |  776 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/spi/adf702x.h |   35 ++
 4 files changed, 823 insertions(+), 0 deletions(-)
 create mode 100644 drivers/net/adf702x.c
 create mode 100644 include/linux/spi/adf702x.h

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index dd9a09c..4354fd9 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -1071,6 +1071,17 @@ config DNET
 	  To compile this driver as a module, choose M here: the module
 	  will be called dnet.
 
+config ADF702X
+	tristate "ADF702x Narrow-Band Short-Range Radio Transceiver"
+	depends on SPI && BLACKFIN
+	---help---
+	  This is a driver for Analog Devices series of ADF702x Narrow-Band
+	  Short-Range Radio Transceiver chipsets, including the ADF7021 and
+	  the ADF7025. This Ethernet like driver implements a custom
+	  software PHY.  Say Y if you want it compiled into the kernel.
+	  To compile this driver as a module, choose M here. The module will
+	  be called adf702x.
+
 source "drivers/net/tulip/Kconfig"
 
 config AT1700
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index ad1346d..c580eab 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -141,6 +141,7 @@ obj-$(CONFIG_FORCEDETH) += forcedeth.o
 obj-$(CONFIG_NE_H8300) += ne-h8300.o 8390.o
 obj-$(CONFIG_AX88796) += ax88796.o
 obj-$(CONFIG_BCM63XX_ENET) += bcm63xx_enet.o
+obj-$(CONFIG_ADF702X) += adf702x.o
 
 obj-$(CONFIG_TSI108_ETH) += tsi108_eth.o
 obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o
diff --git a/drivers/net/adf702x.c b/drivers/net/adf702x.c
new file mode 100644
index 0000000..b695fa4
--- /dev/null
+++ b/drivers/net/adf702x.c
@@ -0,0 +1,776 @@
+/*
+ * ADF702x Narrow-Band Short-Range Radio Transceiver
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2009-2010 Michael Hennerich, Analog Devices Inc.
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/random.h>
+#include <linux/spinlock.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+#include <asm/bfin_sport.h>
+
+#include <linux/spi/adf702x.h>
+
+/*
+ * DEBUG LEVEL
+ * 	0 	OFF
+ *	1	ERRORS
+ *	2	ERRORS + TRACE
+ *	3	ERRORS + TRACE + PACKET DUMP
+ */
+
+#define ADF_DEBUG 0
+#define DBG(n, args...) do { if (ADF_DEBUG >= (n)) pr_debug(args); } while (0)
+
+struct adf702x_priv {
+	struct spi_device *spi;
+	struct net_device *ndev;
+	struct sk_buff *tx_skb;
+	struct delayed_work tx_work;
+	struct work_struct tx_done_work;
+	wait_queue_head_t waitq;
+	dma_addr_t dma_handle;
+	spinlock_t lock;
+	unsigned rx_preamble:1;
+	unsigned rx:1;
+	unsigned rx_size;
+	u32 *rx_buf;
+	u32 *tx_buf;
+
+	/* Base reg base of SPORT controller */
+	volatile struct sport_register *sport;
+	unsigned dma_ch_rx;
+	unsigned dma_ch_tx;
+	unsigned irq_sport_err;
+	unsigned gpio_int_rfs;
+};
+
+static const u16 sym2chip[] = {
+	0x744A,
+	0x44AC,
+	0x4AC3,
+	0xAC39,
+	0xC39B,
+	0x39B7,
+	0x9B74,
+	0xB744,
+	0xDEE2,
+	0xEE26,
+	0xE269,
+	0x2693,
+	0x6931,
+	0x931D,
+	0x31DE,
+	0x1DEE,
+};
+
+#define PKT_MAGIC	(0xA54662DA)	/* Packet Valid Magic */
+#define RX_HEADERSIZE	4	/* ?(PREAMBLE) + PKT_MAGIC + LEN_HI + LEN_LO */
+#define TX_HEADERSIZE	5	/* PREAMBLE + PREAMBLE + PKT_MAGIC + LEN_HI + LEN_LO */
+#define FIFO_WA		6	/* Transfer additional words to workaround DMA FIFO issues */
+#define BITERR 		4	/* MAX Bit Errors Allowed */
+#define REG0_DELAY	40	/* PLL settling delay in us */
+
+#define MAX_PACKET_SIZE	(1550 * 4)
+
+/*
+ * Get 32-bit chip from 8-bit symbol
+ */
+static inline unsigned int adf702x_getchip(unsigned char sym)
+{
+	return (sym2chip[sym >> 4] << 16) | sym2chip[sym & 0xF];
+}
+
+/*
+ * Test packet valid magic
+ */
+static inline int adf702x_testpkt_magic(struct adf702x_priv *lp)
+{
+	if (hweight32(lp->rx_buf[1] ^ PKT_MAGIC) < BITERR)
+		return 1;
+
+	if (hweight32(lp->rx_buf[0] ^ PKT_MAGIC) < BITERR)
+		return 0;
+
+	return -1;
+}
+
+/*
+ * Get 8-bit symbol from 32-bit chip
+ * Returns: symbol or -1 in case of an unrecoverable error
+ */
+static int adf702x_getsymbol(unsigned int chip)
+{
+	int symhi, symlo;
+	unsigned chiphi, chiplo;
+
+	chiphi = chip >> 16;
+	chiplo = chip & 0xFFFF;
+
+	for (symhi = 0; symhi < ARRAY_SIZE(sym2chip); symhi++)
+		if (hweight32(chiphi ^ sym2chip[symhi]) < BITERR)
+			break;
+
+	if (symhi >= ARRAY_SIZE(sym2chip))
+		return -1;
+
+	for (symlo = 0; symlo < ARRAY_SIZE(sym2chip); symlo++)
+		if (hweight32(chiplo ^ sym2chip[symlo]) < BITERR)
+			break;
+
+	if (symlo >= ARRAY_SIZE(sym2chip))
+		return -1;
+
+	return (symhi << 4) | symlo;
+}
+
+/*
+ * Get Packet size from header
+ * Returns: size or 64 in case of an unrecoverable error
+ */
+static inline unsigned short adf702x_getrxsize(struct adf702x_priv *lp, int offset)
+{
+	int size = adf702x_getsymbol(lp->rx_buf[offset + 1]) << 8 |
+			adf702x_getsymbol(lp->rx_buf[offset + 2]);
+
+	if (size > 0)
+		return size;
+
+	DBG(1, "%s :BITERR\n", __func__);
+	lp->ndev->stats.rx_errors++;
+	return 64;	/* Keep the Receiver busy for some time */
+}
+
+static int adf702x_spi_write(struct spi_device *spi, unsigned int data)
+{
+	u16 msg[2];
+
+	msg[0] = data >> 16;
+	msg[1] = data;
+
+	return spi_write(spi, (u8 *)msg, 4);
+}
+
+static int adf702x_init(struct spi_device *spi)
+{
+	struct adf702x_platform_data *pdata = spi->dev.platform_data;
+
+	switch (pdata->adf702x_model) {
+	case MODEL_ADF7025:
+		adf702x_spi_write(spi, pdata->adf702x_regs[2]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[0]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[1]);
+		udelay(1000);
+		adf702x_spi_write(spi, pdata->adf702x_regs[3]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[4]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[6]);
+		udelay(300);
+		adf702x_spi_write(spi, pdata->adf702x_regs[5]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[9]);
+		break;
+	case MODEL_ADF7021:
+		adf702x_spi_write(spi, pdata->adf702x_regs[1]);
+		udelay(800);
+		adf702x_spi_write(spi, pdata->adf702x_regs[3]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[6]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[5]);
+		udelay(300);
+		adf702x_spi_write(spi, pdata->adf702x_regs[11]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[12]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[0]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[4]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[10]);
+		adf702x_spi_write(spi, pdata->adf702x_regs[2]);
+		break;
+	default:
+		dev_err(&spi->dev, "model not supported\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void adf702x_rx(struct spi_device *spi)
+{
+	struct adf702x_platform_data *pdata = spi->dev.platform_data;
+	adf702x_spi_write(spi, pdata->adf702x_regs[0]);
+	udelay(REG0_DELAY);
+	DBG(2, "%s():\n", __func__);
+}
+
+static void adf702x_tx(struct spi_device *spi)
+{
+	struct adf702x_platform_data *pdata = spi->dev.platform_data;
+	adf702x_spi_write(spi, pdata->tx_reg);
+	udelay(REG0_DELAY);
+	DBG(2, "%s():\n", __func__);
+}
+
+static void adf702x_sport_init(struct adf702x_priv *lp)
+{
+	struct adf702x_platform_data *pdata = lp->spi->dev.platform_data;
+
+	lp->sport->tcr2 = DP_SLEN(32-1);
+	lp->sport->tcr1 = TCKFE | LATFS | DITFS | ITFS;
+	lp->sport->rcr2 = DP_SLEN(32-1);
+	lp->sport->rcr1 = RCKFE | LARFS;
+
+	/*
+	 * The ADF7025 requires SPORT TCLK generated externally
+	 * it should be within 2% of CDR_CLK/32.
+	 */
+	if (pdata->adf702x_model == MODEL_ADF7025) {
+		lp->sport->tcr1 = TCKFE | LATFS | DITFS | ITFS | ITCLK;
+		lp->sport->tclkdiv = pdata->adf7025_tclkdiv;
+	}
+}
+
+static void adf702x_setup_rx(struct adf702x_priv *lp)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&lp->lock, flags);
+	lp->rx_preamble = 1;
+	lp->rx = 0;
+	set_dma_x_count(lp->dma_ch_rx, RX_HEADERSIZE);
+	set_dma_start_addr(lp->dma_ch_rx, (unsigned long)lp->rx_buf);
+	enable_dma(lp->dma_ch_rx);
+	lp->sport->rcr1 |= RSPEN;
+	spin_unlock_irqrestore(&lp->lock, flags);
+}
+
+static void adf702x_tx_work(struct work_struct *work)
+{
+	struct adf702x_priv *lp = container_of(work,
+			struct adf702x_priv, tx_work.work);
+
+	DBG(2, "%s: %s(): txDataCount(%d)\n",
+		 lp->ndev->name, __func__,  lp->tx_skb->len);
+
+	DBG(2, "GPIO = %d rx = %d\n", gpio_get_value(lp->gpio_int_rfs), lp->rx);
+
+	/*
+	 * Do some media sense here
+	 * Sleep while the media is busy
+	 */
+
+	wait_event(lp->waitq, !(lp->rx || gpio_get_value(lp->gpio_int_rfs)));
+
+	lp->sport->rcr1 &= ~RSPEN;
+	disable_dma(lp->dma_ch_rx);
+	clear_dma_irqstat(lp->dma_ch_rx);
+
+	adf702x_tx(lp->spi);
+
+	set_dma_x_count(lp->dma_ch_tx, lp->tx_skb->len + TX_HEADERSIZE + FIFO_WA);
+	set_dma_start_addr(lp->dma_ch_tx, (unsigned long)lp->tx_buf);
+	enable_dma(lp->dma_ch_tx);
+
+	lp->sport->tcr1 |= TSPEN;;
+
+	lp->ndev->stats.tx_packets++;
+	lp->ndev->stats.tx_bytes += lp->tx_skb->len;
+}
+
+static void adf702x_tx_done_work(struct work_struct *work)
+{
+	struct adf702x_priv *lp = container_of(work,
+			struct adf702x_priv, tx_done_work);
+
+	DBG(2, "%s: %s(): \n", lp->ndev->name, __func__);
+
+	adf702x_setup_rx(lp);
+	adf702x_rx(lp->spi);
+
+	if (lp->tx_skb) {
+		dev_kfree_skb(lp->tx_skb);
+		lp->tx_skb = NULL;
+	}
+
+	netif_wake_queue(lp->ndev);
+}
+
+static int adf702x_net_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct adf702x_priv *lp = netdev_priv(dev);
+	unsigned char *buf_ptr = skb->data;
+	int i;
+	unsigned char delay;
+
+	DBG(2, "%s: %s(): transmitting %d bytes\n",
+		 dev->name, __func__, skb->len);
+
+	/* Only one packet at a time. Once TXDONE interrupt is serviced, the
+	 * queue will be restarted.
+	 */
+	netif_stop_queue(dev);
+
+	/* Remember the skb for deferred processing */
+	lp->tx_skb = skb;
+
+	BUG_ON(lp->tx_skb->len > MAX_PACKET_SIZE);
+
+	lp->tx_buf[3] = adf702x_getchip(skb->len >> 8);
+	lp->tx_buf[4] = adf702x_getchip(skb->len & 0xFF);
+
+	DBG(3, "TX TX: ");
+	for (i = 0; i < skb->len; i++) {
+		lp->tx_buf[TX_HEADERSIZE + i] = adf702x_getchip(buf_ptr[i]);
+		DBG(3, "%x ", buf_ptr[i]);
+	}
+	DBG(3, "\n");
+
+	/* Avoid contentions
+	 * Schedule transmission randomly (0..64ms)
+	 * This allows other nodes to snip in
+	 */
+
+	delay = random32() >> 26;
+	schedule_delayed_work(&lp->tx_work, msecs_to_jiffies(delay));
+
+	return 0;
+}
+
+static int adf702x_receive(struct net_device *dev)
+{
+	struct sk_buff *skb;
+	struct adf702x_priv *lp = netdev_priv(dev);
+	int i, ret;
+	u8 *data;
+
+	DBG(2, "%s: %s(): \n", lp->ndev->name, __func__);
+
+	skb = dev_alloc_skb(lp->rx_size + NET_IP_ALIGN);
+	if (!skb) {
+		dev->stats.rx_dropped++;
+		return -ENOMEM;
+	}
+
+	skb_reserve(skb, NET_IP_ALIGN);
+
+	data = skb_put(skb, lp->rx_size);
+
+	DBG(3, "RX RX: ");
+	for (i = 0; i < lp->rx_size; i++) {
+		data[i] = ret = adf702x_getsymbol(lp->rx_buf[i]);
+		if (ret < 0) {
+			dev->stats.rx_errors++;
+			dev_kfree_skb(skb);
+			DBG(1, "\nRX BITERR chip = %x\n", lp->rx_buf[i]);
+			return -EIO;
+		}
+		DBG(3, "%x ", data[i]);
+	}
+	DBG(3, "\n");
+
+	skb->protocol = eth_type_trans(skb, dev);
+	skb->ip_summed = CHECKSUM_NONE;
+
+	/* No MAC filtering
+	 * we're always in Promiscuous Mode
+	 */
+
+	netif_rx(skb);
+
+	dev->stats.rx_packets++;
+	dev->stats.rx_bytes += lp->rx_size;
+
+	return 0;
+}
+
+static irqreturn_t adf702x_sport_err_irq(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct adf702x_priv *lp = netdev_priv(dev);
+	unsigned int stat = lp->sport->stat;
+
+	DBG(2, "%s: %s(): \n", lp->ndev->name, __func__);
+	/* Overflow in RX FIFO */
+	if (stat & ROVF)
+		DBG(1, "%s: %s(): ROVF\n", lp->ndev->name, __func__);
+
+	/* These should not happen */
+	if (stat & (TOVF | TUVF | RUVF)) {
+		DBG(1, "SPORT Error:%s %s %s\n",
+		       (stat & TOVF) ? "TX overflow" : "",
+		       (stat & TUVF) ? "TX underflow" : "",
+		       (stat & RUVF) ? "RX underflow" : "");
+	}
+
+	disable_dma(lp->dma_ch_rx);
+	clear_dma_irqstat(lp->dma_ch_rx);
+
+	lp->sport->stat = ROVF | RUVF | TUVF | TOVF; /* Clear ROVF bit */
+	lp->sport->rcr1 &= ~RSPEN;
+
+	dev->stats.rx_over_errors++;
+	dev->stats.rx_errors++;
+	adf702x_setup_rx(lp);
+	wake_up(&lp->waitq);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t adf702x_tx_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct adf702x_priv *lp = netdev_priv(dev);
+
+	DBG(2, "%s:%s(): got TXDone\n",
+			 dev->name, __func__);
+	lp->sport->tcr1 &= ~TSPEN;
+	disable_dma(lp->dma_ch_tx);
+	clear_dma_irqstat(lp->dma_ch_tx);
+	schedule_work(&lp->tx_done_work);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t adf702x_rx_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct adf702x_priv *lp = netdev_priv(dev);
+	int offset;
+	disable_dma(lp->dma_ch_rx);
+	clear_dma_irqstat(lp->dma_ch_rx);
+
+	if (lp->rx_preamble) {
+		/*
+		 * Keep the SPORT enabled
+		 * The FIFO associated with the SPORT acts as buffer -
+		 * while we setup the DMA for the remaining chips.
+		 */
+
+		offset = adf702x_testpkt_magic(lp);
+		if (offset >= 0) {
+			lp->rx_size = adf702x_getrxsize(lp, offset);
+			if (offset == 1) {
+				set_dma_x_count(lp->dma_ch_rx, lp->rx_size);
+				set_dma_start_addr(lp->dma_ch_rx,
+					(unsigned long)lp->rx_buf);
+			} else {
+				lp->rx_buf[0] = lp->rx_buf[3];
+				set_dma_x_count(lp->dma_ch_rx, lp->rx_size - 1);
+				set_dma_start_addr(lp->dma_ch_rx,
+					(unsigned long)&lp->rx_buf[1]);
+			}
+			enable_dma(lp->dma_ch_rx);
+			lp->rx = 1;
+			lp->rx_preamble = 0;
+
+			DBG(2, "%s:%s(): got RX data %d\n",
+				 dev->name, __func__, lp->rx_size);
+
+			return IRQ_HANDLED;
+
+		} else {
+			DBG(1, "%s:%s(): Failed PKT_MAGIC\n",
+				 dev->name, __func__);
+			lp->sport->rcr1 &= ~RSPEN;
+			dev->stats.rx_dropped++;
+			dev->stats.rx_errors++;
+		}
+	} else {
+		lp->sport->rcr1 &= ~RSPEN;
+		adf702x_receive(dev);
+	}
+
+	adf702x_setup_rx(lp);
+	wake_up(&lp->waitq);
+
+	return IRQ_HANDLED;
+}
+
+static int adf702x_net_open(struct net_device *dev)
+{
+	struct adf702x_priv *lp = netdev_priv(dev);
+	struct adf702x_platform_data *pdata = lp->spi->dev.platform_data;
+	unsigned int syncword;
+
+	DBG(2, "%s: %s()\n", dev->name, __func__);
+
+	adf702x_sport_init(lp);
+
+	set_dma_config(lp->dma_ch_rx,
+			set_bfin_dma_config(DIR_WRITE, DMA_FLOW_STOP,
+					INTR_ON_BUF, DIMENSION_LINEAR,
+					DATA_SIZE_32, DMA_SYNC_RESTART));
+
+	set_dma_config(lp->dma_ch_tx,
+			set_bfin_dma_config(DIR_READ, DMA_FLOW_STOP,
+					INTR_ON_BUF, DIMENSION_LINEAR,
+					DATA_SIZE_32, DMA_SYNC_RESTART));
+
+	set_dma_x_modify(lp->dma_ch_rx, 4);
+	set_dma_x_modify(lp->dma_ch_tx, 4);
+
+	switch (pdata->adf702x_model) {
+	case MODEL_ADF7025:
+		syncword = 0xAA000000 | (pdata->adf702x_regs[5] >> 8);
+		break;
+	case MODEL_ADF7021:
+		syncword = 0xAA000000 | (pdata->adf702x_regs[11] >> 8);
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	lp->tx_buf[0] = syncword; /* SFD Start-of-frame delimiter */
+	lp->tx_buf[1] = syncword;
+	lp->tx_buf[2] = PKT_MAGIC;
+
+	adf702x_setup_rx(lp);
+
+	dma_enable_irq(lp->dma_ch_rx);
+	adf702x_rx(lp->spi);
+	netif_start_queue(dev);
+
+	return 0;
+}
+
+static int adf702x_net_close(struct net_device *dev)
+{
+	struct adf702x_priv *lp = netdev_priv(dev);
+	DBG(2, "%s: %s()\n", dev->name, __func__);
+
+	netif_stop_queue(dev);
+	dma_disable_irq(lp->dma_ch_rx);
+
+	return 0;
+}
+
+static const struct net_device_ops adf702x_netdev_ops = {
+	.ndo_open		= adf702x_net_open,
+	.ndo_stop		= adf702x_net_close,
+	.ndo_start_xmit		= adf702x_net_xmit,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address	= eth_mac_addr,
+};
+
+static int __devinit adf702x_probe(struct spi_device *spi)
+{
+	struct net_device *ndev;
+	struct adf702x_priv *lp;
+	struct adf702x_platform_data *pdata = spi->dev.platform_data;
+	int err;
+
+	if (!pdata) {
+		dev_dbg(&spi->dev, "no platform data?\n");
+		return -ENODEV;
+	}
+
+	ndev = alloc_etherdev(sizeof(*lp));
+	if (!ndev) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	dev_set_drvdata(&spi->dev, ndev);
+	SET_NETDEV_DEV(ndev, &spi->dev);
+
+	ndev->netdev_ops = &adf702x_netdev_ops;
+
+	/*
+	 * MAC address? we use a
+	 * random one ...
+	 */
+
+	if (pdata->mac_addr && is_valid_ether_addr(pdata->mac_addr)) {
+		memcpy(ndev->dev_addr, pdata->mac_addr, ETH_ALEN);
+	} else {
+		dev_warn(&spi->dev, "using random MAC addr\n");
+		random_ether_addr(ndev->dev_addr);
+	}
+
+	ndev->mtu = 576;
+	ndev->tx_queue_len = 10;
+	ndev->watchdog_timeo = 0;
+
+	lp = netdev_priv(ndev);
+	lp->ndev = ndev;
+	lp->spi = spi;
+
+	lp->sport = (struct sport_register *) pdata->regs_base;
+	lp->dma_ch_rx = pdata->dma_ch_rx;
+	lp->dma_ch_tx = pdata->dma_ch_tx;
+	lp->irq_sport_err = pdata->irq_sport_err;
+	lp->gpio_int_rfs = pdata->gpio_int_rfs;
+
+	err = peripheral_request_list(pdata->pin_req, dev_name(&spi->dev));
+	if (err) {
+		dev_err(&spi->dev, "failed to request SPORT\n");
+		goto out2;
+	}
+
+	err = request_dma(lp->dma_ch_rx, "SPORT RX Data");
+	if (err) {
+		dev_err(&spi->dev, "failed to request RX dma %d\n", lp->dma_ch_rx);
+		goto out3;
+	}
+
+	err = request_dma(lp->dma_ch_tx, "SPORT TX Data");
+	if (err) {
+		dev_err(&spi->dev, "failed to request TX dma %d\n", lp->dma_ch_tx);
+		goto out4;
+	}
+
+	err = set_dma_callback(lp->dma_ch_rx, adf702x_rx_interrupt, ndev);
+	if (err) {
+		dev_err(&spi->dev, "failed to request RX irq\n");
+		goto out5;
+	}
+
+	err = set_dma_callback(lp->dma_ch_tx, adf702x_tx_interrupt, ndev);
+	if (err) {
+		dev_err(&spi->dev, "failed to request TX irq\n");
+		goto out5;
+	}
+
+	dma_disable_irq(lp->dma_ch_rx);
+
+	if (lp->irq_sport_err) {
+		err = request_irq(lp->irq_sport_err, adf702x_sport_err_irq, 0,
+			"ADF702x SPORT_ERROR", ndev);
+		if (err) {
+			dev_err(&spi->dev, "unable to request SPORT status interrupt\n");
+			goto out5;
+		}
+	}
+
+	lp->rx_buf = dma_alloc_coherent(NULL, MAX_PACKET_SIZE,
+		&lp->dma_handle, GFP_KERNEL);
+
+	if (lp->rx_buf == NULL) {
+		err = -ENOMEM;
+		goto out6;
+	}
+
+	lp->tx_buf = dma_alloc_coherent(NULL, MAX_PACKET_SIZE,
+		&lp->dma_handle, GFP_KERNEL);
+
+	if (lp->rx_buf == NULL) {
+		err = -ENOMEM;
+		goto out7;
+	}
+
+	/*
+	 * This GPIO is connected to the ADF702X INT
+	 * The ADF702X SWD feature starts the SPORT RX DMA (INT connected to SPORT RFS)
+	 * While the initial transfer runs (PREAMBLE, PKT_MAGIC and Packet length), we sense
+	 * this GPIO to see if there is an ongoing transfer.
+	 */
+
+	err = gpio_request(lp->gpio_int_rfs, "ADF702X-INT");
+	if (err)
+		goto out8;
+
+	gpio_direction_input(lp->gpio_int_rfs);
+
+	err = adf702x_init(lp->spi);
+	if (err)
+		goto out9;
+
+	spin_lock_init(&lp->lock);
+	INIT_DELAYED_WORK(&lp->tx_work, adf702x_tx_work);
+	INIT_WORK(&lp->tx_done_work, adf702x_tx_done_work);
+	init_waitqueue_head(&lp->waitq);
+
+	err = register_netdev(ndev);
+	if (err) {
+		dev_err(&spi->dev, "failed to register netdev\n");
+		goto out9;
+	}
+
+	dev_info(&spi->dev, "ADF702XNet Wireless Ethernet driver");
+
+	return 0;
+
+out9:
+	gpio_free(lp->gpio_int_rfs);
+out8:
+	dma_free_coherent(NULL, MAX_PACKET_SIZE, lp->tx_buf, lp->dma_handle);
+out7:
+	dma_free_coherent(NULL, MAX_PACKET_SIZE, lp->rx_buf, lp->dma_handle);
+out6:
+	if (lp->irq_sport_err)
+		free_irq(lp->irq_sport_err, ndev);
+out5:
+	free_dma(lp->dma_ch_tx);
+out4:
+	free_dma(lp->dma_ch_rx);
+out3:
+	peripheral_free_list(pdata->pin_req);
+out2:
+	unregister_netdev(ndev);
+	free_netdev(ndev);
+	dev_set_drvdata(&spi->dev, NULL);
+out:
+	return err;
+}
+
+static int __devexit adf702x_remove(struct spi_device *spi)
+{
+	struct adf702x_platform_data *pdata = spi->dev.platform_data;
+	struct net_device *dev = dev_get_drvdata(&spi->dev);
+	struct adf702x_priv *lp = netdev_priv(dev);
+
+	rtnl_lock();
+	dev_close(dev);
+	unregister_netdevice(dev);
+	rtnl_unlock();
+
+	dma_free_coherent(NULL, MAX_PACKET_SIZE, lp->rx_buf, lp->dma_handle);
+	dma_free_coherent(NULL, MAX_PACKET_SIZE, lp->tx_buf, lp->dma_handle);
+
+	if (lp->irq_sport_err)
+		free_irq(lp->irq_sport_err, dev);
+
+	gpio_free(lp->gpio_int_rfs);
+	free_dma(lp->dma_ch_rx);
+	free_dma(lp->dma_ch_tx);
+	peripheral_free_list(pdata->pin_req);
+
+	free_netdev(dev);
+	dev_set_drvdata(&spi->dev, NULL);
+	return 0;
+}
+
+static struct spi_driver adf702x_spi_driver = {
+	.driver = {
+		.name	= "adf702x",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= adf702x_probe,
+	.remove		= __devexit_p(adf702x_remove),
+};
+
+static int __init adf702x_init_module(void)
+{
+	return spi_register_driver(&adf702x_spi_driver);;
+}
+
+static void __exit adf702x_exit_module(void)
+{
+	spi_unregister_driver(&adf702x_spi_driver);
+}
+
+module_init(adf702x_init_module);
+module_exit(adf702x_exit_module);
+MODULE_AUTHOR("Michael Hennerich <hennerich@...ckfin.uclinux.org>");
+MODULE_DESCRIPTION("ADF702XNet Wireless Ethernet driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/spi/adf702x.h b/include/linux/spi/adf702x.h
new file mode 100644
index 0000000..b8c91ed
--- /dev/null
+++ b/include/linux/spi/adf702x.h
@@ -0,0 +1,35 @@
+/*
+ * include/linux/spi/adf702x.h
+ *
+ * Device characteristics are highly application specific
+ * and may vary between boards and models. The platform_data for the
+ * device's "struct device" holds this information.
+ *
+ * Copyright 2009-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __LINUX_SPI_ADF702X_H__
+#define __LINUX_SPI_ADF702X_H__
+
+#include <linux/if_ether.h>
+
+#define MODEL_ADF7021	7021
+#define MODEL_ADF7025	7025
+
+struct adf702x_platform_data {
+	/* Base reg base of SPORT controller */
+	void __iomem *regs_base;
+	unsigned dma_ch_rx;
+	unsigned dma_ch_tx;
+	unsigned irq_sport_err;
+	unsigned gpio_int_rfs;
+	u16 pin_req[7];
+	u32 adf702x_model;
+	const u32 *adf702x_regs;
+	u32 tx_reg;
+	u32 adf7025_tclkdiv;
+	u8 mac_addr[ETH_ALEN];
+};
+#endif
-- 
1.6.6

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