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* [RFC] cirrus ep93xx ethernet driver
@ 2006-06-26  2:59 Lennert Buytenhek
  2006-06-28  2:05 ` Lennert Buytenhek
  0 siblings, 1 reply; 2+ messages in thread
From: Lennert Buytenhek @ 2006-06-26  2:59 UTC (permalink / raw)
  To: netdev

The cirrus ep93xx is an ARM SoC that includes an ethernet MAC --
this patch adds a driver for that ethernet MAC.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>

(This is, unfortunately, probably too late for 2.6.18, so I'm sending
it just for feedback.)

Index: linux-2.6.17-git5/drivers/net/arm/Kconfig
===================================================================
--- linux-2.6.17-git5.orig/drivers/net/arm/Kconfig
+++ linux-2.6.17-git5/drivers/net/arm/Kconfig
@@ -39,3 +39,10 @@ config ARM_AT91_ETHER
 	help
 	  If you wish to compile a kernel for the AT91RM9200 and enable
 	  ethernet support, then you should always answer Y to this.
+
+config EP93XX_ETH
+	tristate "EP93xx Ethernet support"
+	depends on NET_ETHERNET && ARM && ARCH_EP93XX
+	help
+	  This is a driver for the ethernet hardware included in EP93xx CPUs.
+	  Say Y if you are building a kernel for EP93xx based devices.
Index: linux-2.6.17-git5/drivers/net/arm/Makefile
===================================================================
--- linux-2.6.17-git5.orig/drivers/net/arm/Makefile
+++ linux-2.6.17-git5/drivers/net/arm/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_ARM_ETHERH)	+= etherh.o
 obj-$(CONFIG_ARM_ETHER3)	+= ether3.o
 obj-$(CONFIG_ARM_ETHER1)	+= ether1.o
 obj-$(CONFIG_ARM_AT91_ETHER)	+= at91_ether.o
+obj-$(CONFIG_EP93XX_ETH)	+= ep93xx_eth.o
Index: linux-2.6.17-git5/drivers/net/arm/ep93xx_eth.c
===================================================================
--- /dev/null
+++ linux-2.6.17-git5/drivers/net/arm/ep93xx_eth.c
@@ -0,0 +1,672 @@
+/*
+ * EP93xx ethernet network device driver
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ * Dedicated to Marija Kulikova.
+ *
+ * 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.
+ */
+
+#include <linux/config.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <asm/arch/ep93xx-regs.h>
+#include <asm/arch/platform.h>
+#include <asm/io.h>
+#include "ep93xx_eth.h"
+
+#define DRV_MODULE_VERSION	"0.1"
+
+#define RX_QUEUE_ENTRIES	64
+#define TX_QUEUE_ENTRIES	8
+
+struct ep93xx_descs
+{
+	struct ep93xx_rdesc	rdesc[RX_QUEUE_ENTRIES];
+	struct ep93xx_tdesc	tdesc[TX_QUEUE_ENTRIES];
+	struct ep93xx_rstat	rstat[RX_QUEUE_ENTRIES];
+	struct ep93xx_tstat	tstat[TX_QUEUE_ENTRIES];
+};
+
+struct ep93xx_priv
+{
+	struct resource		*res;
+	void			*base_addr;
+	int			irq;
+
+	struct ep93xx_descs	*descs;
+	dma_addr_t		descs_dma_addr;
+
+	void			*rx_buf[RX_QUEUE_ENTRIES];
+	void			*tx_buf[TX_QUEUE_ENTRIES];
+
+	int			rx_pointer;
+	int			tx_clean_pointer;
+	int			tx_pointer;
+	int			tx_pending;
+
+	struct net_device_stats	stats;
+};
+
+#define rdb(ep, off)		__raw_readb((ep)->base_addr + (off))
+#define rdw(ep, off)		__raw_readw((ep)->base_addr + (off))
+#define rdl(ep, off)		__raw_readl((ep)->base_addr + (off))
+#define wrb(ep, off, val)	__raw_writeb((val), (ep)->base_addr + (off))
+#define wrw(ep, off, val)	__raw_writew((val), (ep)->base_addr + (off))
+#define wrl(ep, off, val)	__raw_writel((val), (ep)->base_addr + (off))
+
+static int ep93xx_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int entry;
+
+	if (unlikely(skb->len) > PAGE_SIZE) {
+		ep->stats.tx_dropped++;
+		dev_kfree_skb(skb);
+		return 0;
+	}
+
+	entry = ep->tx_pointer;
+	ep->tx_pointer = (ep->tx_pointer + 1) % TX_QUEUE_ENTRIES;
+
+	ep->descs->tdesc[entry].tdesc1 =
+		TDESC1_EOF | (entry << 16) | (skb->len & 0xfff);
+	skb_copy_and_csum_dev(skb, ep->tx_buf[entry]);
+	dma_sync_single(NULL, ep->descs->tdesc[entry].buf_addr,
+				skb->len, DMA_TO_DEVICE);
+	dev_kfree_skb(skb);
+
+	dev->trans_start = jiffies;
+
+	local_irq_disable();
+	ep->tx_pending++;
+	if (ep->tx_pending == TX_QUEUE_ENTRIES)
+		netif_stop_queue(dev);
+	local_irq_enable();
+
+	wrl(ep, 0x00bc, 1);
+
+	return 0;
+}
+
+static int ep93xx_rx(struct net_device *dev, int *budget)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int tail_offset;
+	int rx_done;
+	int processed;
+
+	tail_offset = rdl(ep, 0x00a8) - ep->descs_dma_addr;
+
+	rx_done = 0;
+	processed = 0;
+	while (*budget > 0) {
+		int entry;
+		struct ep93xx_rstat *rstat;
+		u32 rstat0;
+		u32 rstat1;
+		int length;
+		struct sk_buff *skb;
+
+		entry = ep->rx_pointer;
+		rstat = ep->descs->rstat + entry;
+		if ((void *)rstat - (void *)ep->descs == tail_offset) {
+			rx_done = 1;
+			break;
+		}
+
+		rstat0 = rstat->rstat0;
+		rstat1 = rstat->rstat1;
+		rstat->rstat0 = 0;
+		rstat->rstat1 = 0;
+
+		if (!(rstat0 & RSTAT0_RFP)) {
+			printk(KERN_CRIT "ep93xx_rx: buffer not done "
+					 " %.8x %.8x\n", rstat0, rstat1);
+			BUG();
+		}
+		if (!(rstat0 & RSTAT0_EOF)) {
+			printk(KERN_CRIT "ep93xx_rx: not end-of-frame "
+					 " %.8x %.8x\n", rstat0, rstat1);
+			BUG();
+		}
+		if (!(rstat0 & RSTAT0_EOB)) {
+			printk(KERN_CRIT "ep93xx_rx: not end-of-buffer "
+					 " %.8x %.8x\n", rstat0, rstat1);
+			BUG();
+		}
+		if (!(rstat1 & RSTAT1_RFP)) {
+			printk(KERN_CRIT "ep93xx_rx: buffer1 not done "
+					 " %.8x %.8x\n", rstat0, rstat1);
+			BUG();
+		}
+		if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry) {
+			printk(KERN_INFO "ep93xx_rx: entry mismatch "
+					 " %.8x %.8x\n", rstat0, rstat1);
+			BUG();
+		}
+
+		if (!(rstat0 & RSTAT0_RWE)) {
+			printk(KERN_NOTICE "ep93xx_rx: receive error "
+					 " %.8x %.8x\n", rstat0, rstat1);
+
+			ep->stats.rx_errors++;
+			if (rstat0 & RSTAT0_OE)
+				ep->stats.rx_fifo_errors++;
+			if (rstat0 & RSTAT0_FE)
+				ep->stats.rx_frame_errors++;
+			if (rstat0 & (RSTAT0_RUNT | RSTAT0_EDATA))
+				ep->stats.rx_length_errors++;
+			if (rstat0 & RSTAT0_CRCE)
+				ep->stats.rx_crc_errors++;
+			goto err;
+		}
+
+		length = rstat1 & RSTAT1_FRAME_LENGTH;
+		if (length < 4 || length > PAGE_SIZE) {
+			printk(KERN_NOTICE "ep93xx_rx: invalid length "
+					 " %.8x %.8x\n", rstat0, rstat1);
+			goto err;
+		}
+
+		/* Strip FCS.  */
+		if (rstat0 & RSTAT0_CRCI)
+			length -= 4;
+
+		skb = dev_alloc_skb(length + 2);
+		if (likely(skb != NULL)) {
+			skb->dev = dev;
+			skb_reserve(skb, 2);
+			dma_sync_single(NULL, ep->descs->rdesc[entry].buf_addr,
+						length, DMA_FROM_DEVICE);
+			eth_copy_and_sum(skb, ep->rx_buf[entry], length, 0);
+			skb_put(skb, length);
+			skb->protocol = eth_type_trans(skb, dev);
+
+			dev->last_rx = jiffies;
+
+			netif_receive_skb(skb);
+
+			ep->stats.rx_packets++;
+			ep->stats.rx_bytes += length;
+		} else {
+			ep->stats.rx_dropped++;
+		}
+
+err:
+		ep->rx_pointer = (entry + 1) % RX_QUEUE_ENTRIES;
+		processed++;
+		dev->quota--;
+		(*budget)--;
+	}
+
+	if (processed) {
+		wrw(ep, 0x009c, processed);
+		wrw(ep, 0x00ac, processed);
+	}
+
+	return !rx_done;
+}
+
+static int ep93xx_have_more_rx(struct ep93xx_priv *ep)
+{
+	struct ep93xx_rstat *rstat;
+	int tail_offset;
+
+	rstat = ep->descs->rstat + ep->rx_pointer;
+	tail_offset = rdl(ep, 0x00a8) - ep->descs_dma_addr;
+
+	return !((void *)rstat - (void *)ep->descs == tail_offset);
+}
+
+static int ep93xx_poll(struct net_device *dev, int *budget)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+
+	/* @@@ Have to stop polling when device is downed while we
+	 * are polling.  */
+
+	wrl(ep, 0x0028, 0x00000004);
+
+poll_some_more:
+	if (ep93xx_rx(dev, budget))
+		return 1;
+
+	netif_rx_complete(dev);
+
+	local_irq_disable();
+	wrl(ep, 0x0024, 0x0000000f);
+	if (ep93xx_have_more_rx(ep)) {
+		wrl(ep, 0x0024, 0x00000008);
+		wrl(ep, 0x0028, 0x00000004);
+		local_irq_enable();
+
+		if (netif_rx_reschedule(dev, 0))
+			goto poll_some_more;
+
+		return 0;
+	}
+	local_irq_enable();
+
+	return 0;
+}
+
+static void ep93xx_tx_complete(struct net_device *dev)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int tail_offset;
+	int wake;
+
+	tail_offset = rdl(ep, 0x00c8) - ep->descs_dma_addr;
+
+	wake = 0;
+	while (1) {
+		int entry;
+		struct ep93xx_tstat *tstat;
+		u32 tstat0;
+
+		entry = ep->tx_clean_pointer;
+		tstat = ep->descs->tstat + entry;
+		if ((void *)tstat - (void *)ep->descs == tail_offset)
+			break;
+
+		tstat0 = tstat->tstat0;
+		tstat->tstat0 = 0;
+
+		if (!(tstat0 & TSTAT0_TXFP)) {
+			printk(KERN_CRIT "ep93xx_tx_complete: buffer not done "
+					 " %.8x\n", tstat0);
+			BUG();
+		}
+		if (tstat0 & TSTAT0_FA) {
+			printk(KERN_CRIT "ep93xx_tx_complete: frame aborted "
+					 " %.8x\n", tstat0);
+			BUG();
+		}
+		if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry) {
+			printk(KERN_INFO "ep93xx_tx_complete: entry mismatch "
+					 " %.8x\n", tstat0);
+			BUG();
+		}
+
+		if (tstat0 & TSTAT0_TXWE) {
+			int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
+
+			ep->stats.tx_packets++;
+			ep->stats.tx_bytes += length;
+		} else {
+			ep->stats.tx_errors++;
+		}
+		if (tstat0 & TSTAT0_LCRS)
+			ep->stats.tx_carrier_errors++;
+		if (tstat0 & TSTAT0_OW)
+			ep->stats.tx_window_errors++;
+		if (tstat0 & TSTAT0_TXU)
+			ep->stats.tx_fifo_errors++;
+		ep->stats.collisions += (tstat0 >> 16) & 0x1f;
+
+		ep->tx_clean_pointer = (entry + 1) % TX_QUEUE_ENTRIES;
+		if (ep->tx_pending == TX_QUEUE_ENTRIES)
+			wake = 1;
+		ep->tx_pending--;
+	}
+
+	if (wake)
+		netif_wake_queue(dev);
+}
+
+static irqreturn_t ep93xx_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct net_device *dev = dev_id;
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	u32 status;
+
+	status = rdl(ep, 0x0028);
+	if (status == 0)
+		return IRQ_NONE;
+
+	if (status & 0x00000004) {
+		if (likely(__netif_rx_schedule_prep(dev))) {
+			wrl(ep, 0x0024, 0x00000008);
+			__netif_rx_schedule(dev);
+		}
+	}
+
+	if (status & 0x00000008) {
+		wrl(ep, 0x0028, 0x00000008);
+		ep93xx_tx_complete(dev);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void ep93xx_free_buffers(struct ep93xx_priv *ep)
+{
+	int i;
+
+	for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+		dma_addr_t d;
+
+		d = ep->descs->rdesc[i].buf_addr;
+		if (d)
+			dma_unmap_single(NULL, d, PAGE_SIZE, DMA_FROM_DEVICE);
+
+		if (ep->rx_buf[i] != NULL)
+			free_page((unsigned long)ep->rx_buf[i]);
+	}
+
+	for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
+		dma_addr_t d;
+
+		d = ep->descs->tdesc[i].buf_addr;
+		if (d)
+			dma_unmap_single(NULL, d, PAGE_SIZE, DMA_TO_DEVICE);
+
+		if (ep->tx_buf[i] != NULL)
+			free_page((unsigned long)ep->tx_buf[i]);
+	}
+
+	dma_free_coherent(NULL, sizeof(struct ep93xx_descs), ep->descs,
+							ep->descs_dma_addr);
+}
+
+static int ep93xx_alloc_buffers(struct ep93xx_priv *ep)
+{
+	int i;
+
+	ep->descs = dma_alloc_coherent(NULL, sizeof(struct ep93xx_descs),
+				&ep->descs_dma_addr, GFP_KERNEL | GFP_DMA);
+	if (ep->descs == NULL)
+		return 1;
+
+	for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+		void *page;
+		dma_addr_t d;
+
+		page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+		if (page == NULL)
+			goto err;
+
+		d = dma_map_single(NULL, page, PAGE_SIZE, DMA_FROM_DEVICE);
+		if (dma_mapping_error(d)) {
+			free_page((unsigned long)page);
+			goto err;
+		}
+
+		ep->rx_buf[i] = page;
+		ep->descs->rdesc[i].buf_addr = d;
+		ep->descs->rdesc[i].rdesc1 = (i << 16) | PAGE_SIZE;
+	}
+
+	for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
+		void *page;
+		dma_addr_t d;
+
+		page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+		if (page == NULL)
+			goto err;
+
+		d = dma_map_single(NULL, page, PAGE_SIZE, DMA_TO_DEVICE);
+		if (dma_mapping_error(d)) {
+			free_page((unsigned long)page);
+			goto err;
+		}
+
+		ep->tx_buf[i] = page;
+		ep->descs->tdesc[i].buf_addr = d;
+	}
+
+	return 0;
+
+err:
+	ep93xx_free_buffers(ep);
+	return 1;
+}
+
+static void ep93xx_start_hw(struct net_device *dev)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	unsigned long addr;
+
+	wrl(ep, 0x0020, 0x00000001);
+	while (rdl(ep, 0x0020) & 0x00000001)
+		;
+
+	/* Receive descriptor ring.  */
+	addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rdesc);
+	wrl(ep, 0x0090, addr);
+	wrl(ep, 0x0098, addr);
+	wrw(ep, 0x0094, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rdesc));
+
+	/* Receive status ring.  */
+	addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rstat);
+	wrl(ep, 0x00a0, addr);
+	wrl(ep, 0x00a8, addr);
+	wrw(ep, 0x00a4, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rstat));
+
+	/* Transmit descriptor ring.  */
+	addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tdesc);
+	wrl(ep, 0x00b0, addr);
+	wrl(ep, 0x00b8, addr);
+	wrw(ep, 0x00b4, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tdesc));
+
+	/* Transmit status ring.  */
+	addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tstat);
+	wrl(ep, 0x00c0, addr);
+	wrl(ep, 0x00c8, addr);
+	wrw(ep, 0x00c4, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tstat));
+
+	wrl(ep, 0x0080, 0x00000101);			// bmctl
+	wrl(ep, 0x0024, 0x0000000f);			// inten
+	wrl(ep, 0x0064, 0x00000000);			// gintmask
+	while (!(rdl(ep, 0x0084) & 0x00000008))
+		cpu_relax();
+	wrl(ep, 0x009c, RX_QUEUE_ENTRIES);
+	wrl(ep, 0x00ac, RX_QUEUE_ENTRIES);
+
+	wrb(ep, 0x0050, dev->dev_addr[0]);
+	wrb(ep, 0x0051, dev->dev_addr[1]);
+	wrb(ep, 0x0052, dev->dev_addr[2]);
+	wrb(ep, 0x0053, dev->dev_addr[3]);
+	wrb(ep, 0x0054, dev->dev_addr[4]);
+	wrb(ep, 0x0055, dev->dev_addr[5]);
+	wrl(ep, 0x004c, 0x00000000);
+
+	wrl(ep, 0x0000, 0x00073800);
+	wrl(ep, 0x0004, 0x00000001);
+}
+
+static void ep93xx_stop_hw(struct net_device *dev)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+
+	wrl(ep, 0x0020, 0x00000001);
+	while (rdl(ep, 0x0020) & 0x00000001)
+		;
+}
+
+static int ep93xx_open(struct net_device *dev)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int err;
+
+	if (ep93xx_alloc_buffers(ep))
+		return -ENOMEM;
+
+	ep93xx_start_hw(dev);
+	ep->rx_pointer = 0;
+	ep->tx_clean_pointer = 0;
+	ep->tx_pointer = 0;
+	ep->tx_pending = 0;
+
+	err = request_irq(ep->irq, ep93xx_irq, SA_SHIRQ, "ep93xx_eth", dev);
+	if (err) {
+		ep93xx_stop_hw(dev);
+		ep93xx_free_buffers(ep);
+		return err;
+	}
+
+	wrl(ep, 0x0064, 0x00008000);			// gintmask
+
+	netif_start_queue(dev);
+
+	return 0;
+}
+
+static int ep93xx_close(struct net_device *dev)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+
+	netif_stop_queue(dev);
+
+	wrl(ep, 0x0064, 0x00000000);			// gintmask
+	free_irq(ep->irq, dev);
+	ep93xx_stop_hw(dev);
+	ep93xx_free_buffers(ep);
+
+	return 0;
+}
+
+static struct net_device_stats *ep93xx_get_stats(struct net_device *dev)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	return &(ep->stats);
+}
+
+struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
+{
+	struct net_device *dev;
+	struct ep93xx_priv *ep;
+
+	dev = alloc_etherdev(sizeof(struct ep93xx_priv));
+	if (dev == NULL)
+		return NULL;
+	ep = netdev_priv(dev);
+
+	memcpy(dev->dev_addr, data->dev_addr, ETH_ALEN);
+
+	dev->hard_start_xmit = ep93xx_xmit;
+	dev->poll = ep93xx_poll;
+	dev->open = ep93xx_open;
+	dev->stop = ep93xx_close;
+	dev->get_stats = ep93xx_get_stats;
+
+	dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
+	dev->weight = 64;
+
+	return dev;
+}
+
+
+static int ep93xx_eth_remove(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct ep93xx_priv *ep;
+
+	dev = platform_get_drvdata(pdev);
+	if (dev == NULL)
+		return 0;
+	platform_set_drvdata(pdev, NULL);
+
+	ep = netdev_priv(dev);
+
+	// @@@ force down
+	unregister_netdev(dev);
+	ep93xx_free_buffers(ep);
+
+	if (ep->base_addr != NULL)
+		iounmap(ep->base_addr);
+
+	if (ep->res != NULL) {
+		release_resource(ep->res);
+		kfree(ep->res);
+	}
+
+	free_netdev(dev);
+
+	return 0;
+}
+
+static int ep93xx_eth_probe(struct platform_device *pdev)
+{
+	struct ep93xx_eth_data *data;
+	struct net_device *dev;
+	struct ep93xx_priv *ep;
+	int err;
+
+	data = pdev->dev.platform_data;
+	if (pdev == NULL)
+		return -ENODEV;
+
+	printk(KERN_INFO "ep93xx-eth " DRV_MODULE_VERSION " loading\n");
+
+	dev = ep93xx_dev_alloc(data);
+	if (dev == NULL) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+	ep = netdev_priv(dev);
+
+	platform_set_drvdata(pdev, dev);
+
+	ep->res = request_mem_region(pdev->resource[0].start,
+			pdev->resource[0].end - pdev->resource[0].start + 1,
+			pdev->dev.bus_id);
+	if (ep->res == NULL) {
+		dev_err(&pdev->dev, "Could not reserve memory region\n");
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	ep->base_addr = ioremap(pdev->resource[0].start,
+			pdev->resource[0].end - pdev->resource[0].start);
+	if (ep->base_addr == NULL) {
+		dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
+		err = -EIO;
+		goto err_out;
+	}
+	ep->irq = pdev->resource[1].start;
+
+	err = register_netdev(dev);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to register netdev\n");
+		goto err_out;
+	}
+
+	return 0;
+
+err_out:
+	ep93xx_eth_remove(pdev);
+	return err;
+}
+
+
+static struct platform_driver ep93xx_eth_driver = {
+	.probe		= ep93xx_eth_probe,
+	.remove		= ep93xx_eth_remove,
+	.driver		= {
+		.name	= "ep93xx-eth",
+	},
+};
+
+static int __init ep93xx_eth_init_module(void)
+{
+	return platform_driver_register(&ep93xx_eth_driver);
+}
+
+static void __exit ep93xx_eth_cleanup_module(void)
+{
+	platform_driver_unregister(&ep93xx_eth_driver);
+}
+
+module_init(ep93xx_eth_init_module);
+module_exit(ep93xx_eth_cleanup_module);
+MODULE_LICENSE("GPL");
Index: linux-2.6.17-git5/drivers/net/arm/ep93xx_eth.h
===================================================================
--- /dev/null
+++ linux-2.6.17-git5/drivers/net/arm/ep93xx_eth.h
@@ -0,0 +1,75 @@
+/*
+ * EP93xx ethernet network device driver
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ * Dedicated to Marija Kulikova.
+ *
+ * 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.
+ */
+
+#ifndef __EP93XX_ETH_H
+#define __EP93XX_ETH_H
+
+struct ep93xx_rdesc
+{
+	u32	buf_addr;
+	u32	rdesc1;
+};
+
+#define RDESC1_NSOF		0x80000000
+#define RDESC1_BUFFER_INDEX	0x7fff0000
+#define RDESC1_BUFFER_LENGTH	0x0000ffff
+
+struct ep93xx_rstat
+{
+	u32	rstat0;
+	u32	rstat1;
+};
+
+#define RSTAT0_RFP		0x80000000
+#define RSTAT0_RWE		0x40000000
+#define RSTAT0_EOF		0x20000000
+#define RSTAT0_EOB		0x10000000
+#define RSTAT0_AM		0x00c00000
+#define RSTAT0_RX_ERR		0x00200000
+#define RSTAT0_OE		0x00100000
+#define RSTAT0_FE		0x00080000
+#define RSTAT0_RUNT		0x00040000
+#define RSTAT0_EDATA		0x00020000
+#define RSTAT0_CRCE		0x00010000
+#define RSTAT0_CRCI		0x00008000
+#define RSTAT0_HTI		0x00003f00
+#define RSTAT1_RFP		0x80000000
+#define RSTAT1_BUFFER_INDEX	0x7fff0000
+#define RSTAT1_FRAME_LENGTH	0x0000ffff
+
+struct ep93xx_tdesc
+{
+	u32	buf_addr;
+	u32	tdesc1;
+};
+
+#define TDESC1_EOF		0x80000000
+#define TDESC1_BUFFER_INDEX	0x7fff0000
+#define TDESC1_BUFFER_ABORT	0x00008000
+#define TDESC1_BUFFER_LENGTH	0x00000fff
+
+struct ep93xx_tstat
+{
+	u32	tstat0;
+};
+
+#define TSTAT0_TXFP		0x80000000
+#define TSTAT0_TXWE		0x40000000
+#define TSTAT0_FA		0x20000000
+#define TSTAT0_LCRS		0x10000000
+#define TSTAT0_OW		0x04000000
+#define TSTAT0_TXU		0x02000000
+#define TSTAT0_ECOLL		0x01000000
+#define TSTAT0_NCOLL		0x001f0000
+#define TSTAT0_BUFFER_INDEX	0x00007fff
+
+
+#endif
Index: linux-2.6.17-git5/include/asm-arm/arch-ep93xx/ep93xx-regs.h
===================================================================
--- linux-2.6.17-git5.orig/include/asm-arm/arch-ep93xx/ep93xx-regs.h
+++ linux-2.6.17-git5/include/asm-arm/arch-ep93xx/ep93xx-regs.h
@@ -27,6 +27,7 @@
 #define EP93XX_DMA_BASE			(EP93XX_AHB_VIRT_BASE + 0x00000000)
 
 #define EP93XX_ETHERNET_BASE		(EP93XX_AHB_VIRT_BASE + 0x00010000)
+#define EP93XX_ETHERNET_PHYS_BASE	(EP93XX_AHB_PHYS_BASE + 0x00010000)
 
 #define EP93XX_USB_BASE			(EP93XX_AHB_VIRT_BASE + 0x00020000)
 #define EP93XX_USB_PHYS_BASE		(EP93XX_AHB_PHYS_BASE + 0x00020000)
Index: linux-2.6.17-git5/include/asm-arm/arch-ep93xx/platform.h
===================================================================
--- linux-2.6.17-git5.orig/include/asm-arm/arch-ep93xx/platform.h
+++ linux-2.6.17-git5/include/asm-arm/arch-ep93xx/platform.h
@@ -16,5 +16,10 @@ struct ep93xx_i2c_pins {
 	unsigned long scl_pin;
 };
 
+struct ep93xx_eth_data
+{
+	unsigned char	dev_addr[6];
+};
+
 
 #endif

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2006-06-28  2:05 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
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2006-06-26  2:59 [RFC] cirrus ep93xx ethernet driver Lennert Buytenhek
2006-06-28  2:05 ` Lennert Buytenhek

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