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-rw-r--r--drivers/net/ethernet/amd/sunlance.c1524
1 files changed, 1524 insertions, 0 deletions
diff --git a/drivers/net/ethernet/amd/sunlance.c b/drivers/net/ethernet/amd/sunlance.c
new file mode 100644
index 000000000..ddece276a
--- /dev/null
+++ b/drivers/net/ethernet/amd/sunlance.c
@@ -0,0 +1,1524 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
+ * lance.c: Linux/Sparc/Lance driver
+ *
+ * Written 1995, 1996 by Miguel de Icaza
+ * Sources:
+ * The Linux depca driver
+ * The Linux lance driver.
+ * The Linux skeleton driver.
+ * The NetBSD Sparc/Lance driver.
+ * Theo de Raadt (deraadt@openbsd.org)
+ * NCR92C990 Lan Controller manual
+ *
+ * 1.4:
+ * Added support to run with a ledma on the Sun4m
+ *
+ * 1.5:
+ * Added multiple card detection.
+ *
+ * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
+ * (ecd@skynet.be)
+ *
+ * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
+ * (ecd@skynet.be)
+ *
+ * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
+ * (davem@caip.rutgers.edu)
+ *
+ * 5/29/96: override option 'tpe-link-test?', if it is 'false', as
+ * this disables auto carrier detection on sun4m. Eddie C. Dost
+ * (ecd@skynet.be)
+ *
+ * 1.7:
+ * 6/26/96: Bug fix for multiple ledmas, miguel.
+ *
+ * 1.8:
+ * Stole multicast code from depca.c, fixed lance_tx.
+ *
+ * 1.9:
+ * 8/21/96: Fixed the multicast code (Pedro Roque)
+ *
+ * 8/28/96: Send fake packet in lance_open() if auto_select is true,
+ * so we can detect the carrier loss condition in time.
+ * Eddie C. Dost (ecd@skynet.be)
+ *
+ * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
+ * MNA trap during chksum_partial_copy(). (ecd@skynet.be)
+ *
+ * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
+ *
+ * 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
+ * This was the sun4c killer. Shit, stupid bug.
+ * (ecd@skynet.be)
+ *
+ * 1.10:
+ * 1/26/97: Modularize driver. (ecd@skynet.be)
+ *
+ * 1.11:
+ * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
+ *
+ * 1.12:
+ * 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
+ * Anton Blanchard (anton@progsoc.uts.edu.au)
+ * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
+ * David S. Miller (davem@redhat.com)
+ * 2.01:
+ * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
+ *
+ */
+
+#undef DEBUG_DRIVER
+
+static char lancestr[] = "LANCE";
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/crc32.h>
+#include <linux/errno.h>
+#include <linux/socket.h> /* Used for the temporal inet entries and routing */
+#include <linux/route.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/ethtool.h>
+#include <linux/bitops.h>
+#include <linux/dma-mapping.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/gfp.h>
+#include <linux/pgtable.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/byteorder.h> /* Used by the checksum routines */
+#include <asm/idprom.h>
+#include <asm/prom.h>
+#include <asm/auxio.h> /* For tpe-link-test? setting */
+#include <asm/irq.h>
+
+#define DRV_NAME "sunlance"
+#define DRV_RELDATE "8/24/03"
+#define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
+
+MODULE_AUTHOR(DRV_AUTHOR);
+MODULE_DESCRIPTION("Sun Lance ethernet driver");
+MODULE_LICENSE("GPL");
+
+/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
+#ifndef LANCE_LOG_TX_BUFFERS
+#define LANCE_LOG_TX_BUFFERS 4
+#define LANCE_LOG_RX_BUFFERS 4
+#endif
+
+#define LE_CSR0 0
+#define LE_CSR1 1
+#define LE_CSR2 2
+#define LE_CSR3 3
+
+#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
+
+#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
+#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
+#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
+#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
+#define LE_C0_MERR 0x0800 /* ME: Memory error */
+#define LE_C0_RINT 0x0400 /* Received interrupt */
+#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
+#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
+#define LE_C0_INTR 0x0080 /* Interrupt or error */
+#define LE_C0_INEA 0x0040 /* Interrupt enable */
+#define LE_C0_RXON 0x0020 /* Receiver on */
+#define LE_C0_TXON 0x0010 /* Transmitter on */
+#define LE_C0_TDMD 0x0008 /* Transmitter demand */
+#define LE_C0_STOP 0x0004 /* Stop the card */
+#define LE_C0_STRT 0x0002 /* Start the card */
+#define LE_C0_INIT 0x0001 /* Init the card */
+
+#define LE_C3_BSWP 0x4 /* SWAP */
+#define LE_C3_ACON 0x2 /* ALE Control */
+#define LE_C3_BCON 0x1 /* Byte control */
+
+/* Receive message descriptor 1 */
+#define LE_R1_OWN 0x80 /* Who owns the entry */
+#define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
+#define LE_R1_FRA 0x20 /* FRA: Frame error */
+#define LE_R1_OFL 0x10 /* OFL: Frame overflow */
+#define LE_R1_CRC 0x08 /* CRC error */
+#define LE_R1_BUF 0x04 /* BUF: Buffer error */
+#define LE_R1_SOP 0x02 /* Start of packet */
+#define LE_R1_EOP 0x01 /* End of packet */
+#define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
+
+#define LE_T1_OWN 0x80 /* Lance owns the packet */
+#define LE_T1_ERR 0x40 /* Error summary */
+#define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
+#define LE_T1_EONE 0x08 /* Error: one retry needed */
+#define LE_T1_EDEF 0x04 /* Error: deferred */
+#define LE_T1_SOP 0x02 /* Start of packet */
+#define LE_T1_EOP 0x01 /* End of packet */
+#define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
+
+#define LE_T3_BUF 0x8000 /* Buffer error */
+#define LE_T3_UFL 0x4000 /* Error underflow */
+#define LE_T3_LCOL 0x1000 /* Error late collision */
+#define LE_T3_CLOS 0x0800 /* Error carrier loss */
+#define LE_T3_RTY 0x0400 /* Error retry */
+#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
+
+#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
+#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
+#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
+#define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
+
+#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
+#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
+#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
+#define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
+
+#define PKT_BUF_SZ 1544
+#define RX_BUFF_SIZE PKT_BUF_SZ
+#define TX_BUFF_SIZE PKT_BUF_SZ
+
+struct lance_rx_desc {
+ u16 rmd0; /* low address of packet */
+ u8 rmd1_bits; /* descriptor bits */
+ u8 rmd1_hadr; /* high address of packet */
+ s16 length; /* This length is 2s complement (negative)!
+ * Buffer length
+ */
+ u16 mblength; /* This is the actual number of bytes received */
+};
+
+struct lance_tx_desc {
+ u16 tmd0; /* low address of packet */
+ u8 tmd1_bits; /* descriptor bits */
+ u8 tmd1_hadr; /* high address of packet */
+ s16 length; /* Length is 2s complement (negative)! */
+ u16 misc;
+};
+
+/* The LANCE initialization block, described in databook. */
+/* On the Sparc, this block should be on a DMA region */
+struct lance_init_block {
+ u16 mode; /* Pre-set mode (reg. 15) */
+ u8 phys_addr[6]; /* Physical ethernet address */
+ u32 filter[2]; /* Multicast filter. */
+
+ /* Receive and transmit ring base, along with extra bits. */
+ u16 rx_ptr; /* receive descriptor addr */
+ u16 rx_len; /* receive len and high addr */
+ u16 tx_ptr; /* transmit descriptor addr */
+ u16 tx_len; /* transmit len and high addr */
+
+ /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
+ struct lance_rx_desc brx_ring[RX_RING_SIZE];
+ struct lance_tx_desc btx_ring[TX_RING_SIZE];
+
+ u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
+ u8 pad[2]; /* align rx_buf for copy_and_sum(). */
+ u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
+};
+
+#define libdesc_offset(rt, elem) \
+((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
+
+#define libbuff_offset(rt, elem) \
+((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
+
+struct lance_private {
+ void __iomem *lregs; /* Lance RAP/RDP regs. */
+ void __iomem *dregs; /* DMA controller regs. */
+ struct lance_init_block __iomem *init_block_iomem;
+ struct lance_init_block *init_block_mem;
+
+ spinlock_t lock;
+
+ int rx_new, tx_new;
+ int rx_old, tx_old;
+
+ struct platform_device *ledma; /* If set this points to ledma */
+ char tpe; /* cable-selection is TPE */
+ char auto_select; /* cable-selection by carrier */
+ char burst_sizes; /* ledma SBus burst sizes */
+ char pio_buffer; /* init block in PIO space? */
+
+ unsigned short busmaster_regval;
+
+ void (*init_ring)(struct net_device *);
+ void (*rx)(struct net_device *);
+ void (*tx)(struct net_device *);
+
+ char *name;
+ dma_addr_t init_block_dvma;
+ struct net_device *dev; /* Backpointer */
+ struct platform_device *op;
+ struct platform_device *lebuffer;
+ struct timer_list multicast_timer;
+};
+
+#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
+ lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
+ lp->tx_old - lp->tx_new-1)
+
+/* Lance registers. */
+#define RDP 0x00UL /* register data port */
+#define RAP 0x02UL /* register address port */
+#define LANCE_REG_SIZE 0x04UL
+
+#define STOP_LANCE(__lp) \
+do { void __iomem *__base = (__lp)->lregs; \
+ sbus_writew(LE_CSR0, __base + RAP); \
+ sbus_writew(LE_C0_STOP, __base + RDP); \
+} while (0)
+
+int sparc_lance_debug = 2;
+
+/* The Lance uses 24 bit addresses */
+/* On the Sun4c the DVMA will provide the remaining bytes for us */
+/* On the Sun4m we have to instruct the ledma to provide them */
+/* Even worse, on scsi/ether SBUS cards, the init block and the
+ * transmit/receive buffers are addresses as offsets from absolute
+ * zero on the lebuffer PIO area. -DaveM
+ */
+
+#define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
+
+/* Load the CSR registers */
+static void load_csrs(struct lance_private *lp)
+{
+ u32 leptr;
+
+ if (lp->pio_buffer)
+ leptr = 0;
+ else
+ leptr = LANCE_ADDR(lp->init_block_dvma);
+
+ sbus_writew(LE_CSR1, lp->lregs + RAP);
+ sbus_writew(leptr & 0xffff, lp->lregs + RDP);
+ sbus_writew(LE_CSR2, lp->lregs + RAP);
+ sbus_writew(leptr >> 16, lp->lregs + RDP);
+ sbus_writew(LE_CSR3, lp->lregs + RAP);
+ sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
+
+ /* Point back to csr0 */
+ sbus_writew(LE_CSR0, lp->lregs + RAP);
+}
+
+/* Setup the Lance Rx and Tx rings */
+static void lance_init_ring_dvma(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_init_block *ib = lp->init_block_mem;
+ dma_addr_t aib = lp->init_block_dvma;
+ __u32 leptr;
+ int i;
+
+ /* Lock out other processes while setting up hardware */
+ netif_stop_queue(dev);
+ lp->rx_new = lp->tx_new = 0;
+ lp->rx_old = lp->tx_old = 0;
+
+ /* Copy the ethernet address to the lance init block
+ * Note that on the sparc you need to swap the ethernet address.
+ */
+ ib->phys_addr [0] = dev->dev_addr [1];
+ ib->phys_addr [1] = dev->dev_addr [0];
+ ib->phys_addr [2] = dev->dev_addr [3];
+ ib->phys_addr [3] = dev->dev_addr [2];
+ ib->phys_addr [4] = dev->dev_addr [5];
+ ib->phys_addr [5] = dev->dev_addr [4];
+
+ /* Setup the Tx ring entries */
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
+ ib->btx_ring [i].tmd0 = leptr;
+ ib->btx_ring [i].tmd1_hadr = leptr >> 16;
+ ib->btx_ring [i].tmd1_bits = 0;
+ ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
+ ib->btx_ring [i].misc = 0;
+ }
+
+ /* Setup the Rx ring entries */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
+
+ ib->brx_ring [i].rmd0 = leptr;
+ ib->brx_ring [i].rmd1_hadr = leptr >> 16;
+ ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
+ ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
+ ib->brx_ring [i].mblength = 0;
+ }
+
+ /* Setup the initialization block */
+
+ /* Setup rx descriptor pointer */
+ leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
+ ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
+ ib->rx_ptr = leptr;
+
+ /* Setup tx descriptor pointer */
+ leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
+ ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
+ ib->tx_ptr = leptr;
+}
+
+static void lance_init_ring_pio(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ u32 leptr;
+ int i;
+
+ /* Lock out other processes while setting up hardware */
+ netif_stop_queue(dev);
+ lp->rx_new = lp->tx_new = 0;
+ lp->rx_old = lp->tx_old = 0;
+
+ /* Copy the ethernet address to the lance init block
+ * Note that on the sparc you need to swap the ethernet address.
+ */
+ sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
+ sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
+ sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
+ sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
+ sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
+ sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
+
+ /* Setup the Tx ring entries */
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ leptr = libbuff_offset(tx_buf, i);
+ sbus_writew(leptr, &ib->btx_ring [i].tmd0);
+ sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
+ sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
+
+ /* The ones required by tmd2 */
+ sbus_writew(0xf000, &ib->btx_ring [i].length);
+ sbus_writew(0, &ib->btx_ring [i].misc);
+ }
+
+ /* Setup the Rx ring entries */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ leptr = libbuff_offset(rx_buf, i);
+
+ sbus_writew(leptr, &ib->brx_ring [i].rmd0);
+ sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
+ sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
+ sbus_writew(-RX_BUFF_SIZE|0xf000,
+ &ib->brx_ring [i].length);
+ sbus_writew(0, &ib->brx_ring [i].mblength);
+ }
+
+ /* Setup the initialization block */
+
+ /* Setup rx descriptor pointer */
+ leptr = libdesc_offset(brx_ring, 0);
+ sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
+ &ib->rx_len);
+ sbus_writew(leptr, &ib->rx_ptr);
+
+ /* Setup tx descriptor pointer */
+ leptr = libdesc_offset(btx_ring, 0);
+ sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
+ &ib->tx_len);
+ sbus_writew(leptr, &ib->tx_ptr);
+}
+
+static void init_restart_ledma(struct lance_private *lp)
+{
+ u32 csr = sbus_readl(lp->dregs + DMA_CSR);
+
+ if (!(csr & DMA_HNDL_ERROR)) {
+ /* E-Cache draining */
+ while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
+ barrier();
+ }
+
+ csr = sbus_readl(lp->dregs + DMA_CSR);
+ csr &= ~DMA_E_BURSTS;
+ if (lp->burst_sizes & DMA_BURST32)
+ csr |= DMA_E_BURST32;
+ else
+ csr |= DMA_E_BURST16;
+
+ csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
+
+ if (lp->tpe)
+ csr |= DMA_EN_ENETAUI;
+ else
+ csr &= ~DMA_EN_ENETAUI;
+ udelay(20);
+ sbus_writel(csr, lp->dregs + DMA_CSR);
+ udelay(200);
+}
+
+static int init_restart_lance(struct lance_private *lp)
+{
+ u16 regval = 0;
+ int i;
+
+ if (lp->dregs)
+ init_restart_ledma(lp);
+
+ sbus_writew(LE_CSR0, lp->lregs + RAP);
+ sbus_writew(LE_C0_INIT, lp->lregs + RDP);
+
+ /* Wait for the lance to complete initialization */
+ for (i = 0; i < 100; i++) {
+ regval = sbus_readw(lp->lregs + RDP);
+
+ if (regval & (LE_C0_ERR | LE_C0_IDON))
+ break;
+ barrier();
+ }
+ if (i == 100 || (regval & LE_C0_ERR)) {
+ printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
+ i, regval);
+ if (lp->dregs)
+ printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
+ return -1;
+ }
+
+ /* Clear IDON by writing a "1", enable interrupts and start lance */
+ sbus_writew(LE_C0_IDON, lp->lregs + RDP);
+ sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
+
+ if (lp->dregs) {
+ u32 csr = sbus_readl(lp->dregs + DMA_CSR);
+
+ csr |= DMA_INT_ENAB;
+ sbus_writel(csr, lp->dregs + DMA_CSR);
+ }
+
+ return 0;
+}
+
+static void lance_rx_dvma(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_init_block *ib = lp->init_block_mem;
+ struct lance_rx_desc *rd;
+ u8 bits;
+ int len, entry = lp->rx_new;
+ struct sk_buff *skb;
+
+ for (rd = &ib->brx_ring [entry];
+ !((bits = rd->rmd1_bits) & LE_R1_OWN);
+ rd = &ib->brx_ring [entry]) {
+
+ /* We got an incomplete frame? */
+ if ((bits & LE_R1_POK) != LE_R1_POK) {
+ dev->stats.rx_over_errors++;
+ dev->stats.rx_errors++;
+ } else if (bits & LE_R1_ERR) {
+ /* Count only the end frame as a rx error,
+ * not the beginning
+ */
+ if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
+ if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
+ if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
+ if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
+ if (bits & LE_R1_EOP) dev->stats.rx_errors++;
+ } else {
+ len = (rd->mblength & 0xfff) - 4;
+ skb = netdev_alloc_skb(dev, len + 2);
+
+ if (skb == NULL) {
+ dev->stats.rx_dropped++;
+ rd->mblength = 0;
+ rd->rmd1_bits = LE_R1_OWN;
+ lp->rx_new = RX_NEXT(entry);
+ return;
+ }
+
+ dev->stats.rx_bytes += len;
+
+ skb_reserve(skb, 2); /* 16 byte align */
+ skb_put(skb, len); /* make room */
+ skb_copy_to_linear_data(skb,
+ (unsigned char *)&(ib->rx_buf [entry][0]),
+ len);
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+ }
+
+ /* Return the packet to the pool */
+ rd->mblength = 0;
+ rd->rmd1_bits = LE_R1_OWN;
+ entry = RX_NEXT(entry);
+ }
+
+ lp->rx_new = entry;
+}
+
+static void lance_tx_dvma(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_init_block *ib = lp->init_block_mem;
+ int i, j;
+
+ spin_lock(&lp->lock);
+
+ j = lp->tx_old;
+ for (i = j; i != lp->tx_new; i = j) {
+ struct lance_tx_desc *td = &ib->btx_ring [i];
+ u8 bits = td->tmd1_bits;
+
+ /* If we hit a packet not owned by us, stop */
+ if (bits & LE_T1_OWN)
+ break;
+
+ if (bits & LE_T1_ERR) {
+ u16 status = td->misc;
+
+ dev->stats.tx_errors++;
+ if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
+ if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
+
+ if (status & LE_T3_CLOS) {
+ dev->stats.tx_carrier_errors++;
+ if (lp->auto_select) {
+ lp->tpe = 1 - lp->tpe;
+ printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
+ dev->name, lp->tpe?"TPE":"AUI");
+ STOP_LANCE(lp);
+ lp->init_ring(dev);
+ load_csrs(lp);
+ init_restart_lance(lp);
+ goto out;
+ }
+ }
+
+ /* Buffer errors and underflows turn off the
+ * transmitter, restart the adapter.
+ */
+ if (status & (LE_T3_BUF|LE_T3_UFL)) {
+ dev->stats.tx_fifo_errors++;
+
+ printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
+ dev->name);
+ STOP_LANCE(lp);
+ lp->init_ring(dev);
+ load_csrs(lp);
+ init_restart_lance(lp);
+ goto out;
+ }
+ } else if ((bits & LE_T1_POK) == LE_T1_POK) {
+ /*
+ * So we don't count the packet more than once.
+ */
+ td->tmd1_bits = bits & ~(LE_T1_POK);
+
+ /* One collision before packet was sent. */
+ if (bits & LE_T1_EONE)
+ dev->stats.collisions++;
+
+ /* More than one collision, be optimistic. */
+ if (bits & LE_T1_EMORE)
+ dev->stats.collisions += 2;
+
+ dev->stats.tx_packets++;
+ }
+
+ j = TX_NEXT(j);
+ }
+ lp->tx_old = j;
+out:
+ if (netif_queue_stopped(dev) &&
+ TX_BUFFS_AVAIL > 0)
+ netif_wake_queue(dev);
+
+ spin_unlock(&lp->lock);
+}
+
+static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
+{
+ u16 *p16 = (u16 *) skb->data;
+ u32 *p32;
+ u8 *p8;
+ void __iomem *pbuf = piobuf;
+
+ /* We know here that both src and dest are on a 16bit boundary. */
+ *p16++ = sbus_readw(pbuf);
+ p32 = (u32 *) p16;
+ pbuf += 2;
+ len -= 2;
+
+ while (len >= 4) {
+ *p32++ = sbus_readl(pbuf);
+ pbuf += 4;
+ len -= 4;
+ }
+ p8 = (u8 *) p32;
+ if (len >= 2) {
+ p16 = (u16 *) p32;
+ *p16++ = sbus_readw(pbuf);
+ pbuf += 2;
+ len -= 2;
+ p8 = (u8 *) p16;
+ }
+ if (len >= 1)
+ *p8 = sbus_readb(pbuf);
+}
+
+static void lance_rx_pio(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ struct lance_rx_desc __iomem *rd;
+ unsigned char bits;
+ int len, entry;
+ struct sk_buff *skb;
+
+ entry = lp->rx_new;
+ for (rd = &ib->brx_ring [entry];
+ !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
+ rd = &ib->brx_ring [entry]) {
+
+ /* We got an incomplete frame? */
+ if ((bits & LE_R1_POK) != LE_R1_POK) {
+ dev->stats.rx_over_errors++;
+ dev->stats.rx_errors++;
+ } else if (bits & LE_R1_ERR) {
+ /* Count only the end frame as a rx error,
+ * not the beginning
+ */
+ if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
+ if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
+ if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
+ if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
+ if (bits & LE_R1_EOP) dev->stats.rx_errors++;
+ } else {
+ len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
+ skb = netdev_alloc_skb(dev, len + 2);
+
+ if (skb == NULL) {
+ dev->stats.rx_dropped++;
+ sbus_writew(0, &rd->mblength);
+ sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
+ lp->rx_new = RX_NEXT(entry);
+ return;
+ }
+
+ dev->stats.rx_bytes += len;
+
+ skb_reserve (skb, 2); /* 16 byte align */
+ skb_put(skb, len); /* make room */
+ lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+ }
+
+ /* Return the packet to the pool */
+ sbus_writew(0, &rd->mblength);
+ sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
+ entry = RX_NEXT(entry);
+ }
+
+ lp->rx_new = entry;
+}
+
+static void lance_tx_pio(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ int i, j;
+
+ spin_lock(&lp->lock);
+
+ j = lp->tx_old;
+ for (i = j; i != lp->tx_new; i = j) {
+ struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
+ u8 bits = sbus_readb(&td->tmd1_bits);
+
+ /* If we hit a packet not owned by us, stop */
+ if (bits & LE_T1_OWN)
+ break;
+
+ if (bits & LE_T1_ERR) {
+ u16 status = sbus_readw(&td->misc);
+
+ dev->stats.tx_errors++;
+ if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
+ if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
+
+ if (status & LE_T3_CLOS) {
+ dev->stats.tx_carrier_errors++;
+ if (lp->auto_select) {
+ lp->tpe = 1 - lp->tpe;
+ printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
+ dev->name, lp->tpe?"TPE":"AUI");
+ STOP_LANCE(lp);
+ lp->init_ring(dev);
+ load_csrs(lp);
+ init_restart_lance(lp);
+ goto out;
+ }
+ }
+
+ /* Buffer errors and underflows turn off the
+ * transmitter, restart the adapter.
+ */
+ if (status & (LE_T3_BUF|LE_T3_UFL)) {
+ dev->stats.tx_fifo_errors++;
+
+ printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
+ dev->name);
+ STOP_LANCE(lp);
+ lp->init_ring(dev);
+ load_csrs(lp);
+ init_restart_lance(lp);
+ goto out;
+ }
+ } else if ((bits & LE_T1_POK) == LE_T1_POK) {
+ /*
+ * So we don't count the packet more than once.
+ */
+ sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
+
+ /* One collision before packet was sent. */
+ if (bits & LE_T1_EONE)
+ dev->stats.collisions++;
+
+ /* More than one collision, be optimistic. */
+ if (bits & LE_T1_EMORE)
+ dev->stats.collisions += 2;
+
+ dev->stats.tx_packets++;
+ }
+
+ j = TX_NEXT(j);
+ }
+ lp->tx_old = j;
+
+ if (netif_queue_stopped(dev) &&
+ TX_BUFFS_AVAIL > 0)
+ netif_wake_queue(dev);
+out:
+ spin_unlock(&lp->lock);
+}
+
+static irqreturn_t lance_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct lance_private *lp = netdev_priv(dev);
+ int csr0;
+
+ sbus_writew(LE_CSR0, lp->lregs + RAP);
+ csr0 = sbus_readw(lp->lregs + RDP);
+
+ /* Acknowledge all the interrupt sources ASAP */
+ sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
+ lp->lregs + RDP);
+
+ if ((csr0 & LE_C0_ERR) != 0) {
+ /* Clear the error condition */
+ sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
+ LE_C0_CERR | LE_C0_MERR),
+ lp->lregs + RDP);
+ }
+
+ if (csr0 & LE_C0_RINT)
+ lp->rx(dev);
+
+ if (csr0 & LE_C0_TINT)
+ lp->tx(dev);
+
+ if (csr0 & LE_C0_BABL)
+ dev->stats.tx_errors++;
+
+ if (csr0 & LE_C0_MISS)
+ dev->stats.rx_errors++;
+
+ if (csr0 & LE_C0_MERR) {
+ if (lp->dregs) {
+ u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
+
+ printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
+ dev->name, csr0, addr & 0xffffff);
+ } else {
+ printk(KERN_ERR "%s: Memory error, status %04x\n",
+ dev->name, csr0);
+ }
+
+ sbus_writew(LE_C0_STOP, lp->lregs + RDP);
+
+ if (lp->dregs) {
+ u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
+
+ dma_csr |= DMA_FIFO_INV;
+ sbus_writel(dma_csr, lp->dregs + DMA_CSR);
+ }
+
+ lp->init_ring(dev);
+ load_csrs(lp);
+ init_restart_lance(lp);
+ netif_wake_queue(dev);
+ }
+
+ sbus_writew(LE_C0_INEA, lp->lregs + RDP);
+
+ return IRQ_HANDLED;
+}
+
+/* Build a fake network packet and send it to ourselves. */
+static void build_fake_packet(struct lance_private *lp)
+{
+ struct net_device *dev = lp->dev;
+ int i, entry;
+
+ entry = lp->tx_new & TX_RING_MOD_MASK;
+ if (lp->pio_buffer) {
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
+ struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
+ for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
+ sbus_writew(0, &packet[i]);
+ for (i = 0; i < 6; i++) {
+ sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
+ sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
+ }
+ sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
+ sbus_writew(0, &ib->btx_ring[entry].misc);
+ sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
+ } else {
+ struct lance_init_block *ib = lp->init_block_mem;
+ u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
+ struct ethhdr *eth = (struct ethhdr *) packet;
+ memset(packet, 0, ETH_ZLEN);
+ for (i = 0; i < 6; i++) {
+ eth->h_dest[i] = dev->dev_addr[i];
+ eth->h_source[i] = dev->dev_addr[i];
+ }
+ ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
+ ib->btx_ring[entry].misc = 0;
+ ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
+ }
+ lp->tx_new = TX_NEXT(entry);
+}
+
+static int lance_open(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ int status = 0;
+
+ STOP_LANCE(lp);
+
+ if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
+ lancestr, (void *) dev)) {
+ printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
+ return -EAGAIN;
+ }
+
+ /* On the 4m, setup the ledma to provide the upper bits for buffers */
+ if (lp->dregs) {
+ u32 regval = lp->init_block_dvma & 0xff000000;
+
+ sbus_writel(regval, lp->dregs + DMA_TEST);
+ }
+
+ /* Set mode and clear multicast filter only at device open,
+ * so that lance_init_ring() called at any error will not
+ * forget multicast filters.
+ *
+ * BTW it is common bug in all lance drivers! --ANK
+ */
+ if (lp->pio_buffer) {
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ sbus_writew(0, &ib->mode);
+ sbus_writel(0, &ib->filter[0]);
+ sbus_writel(0, &ib->filter[1]);
+ } else {
+ struct lance_init_block *ib = lp->init_block_mem;
+ ib->mode = 0;
+ ib->filter [0] = 0;
+ ib->filter [1] = 0;
+ }
+
+ lp->init_ring(dev);
+ load_csrs(lp);
+
+ netif_start_queue(dev);
+
+ status = init_restart_lance(lp);
+ if (!status && lp->auto_select) {
+ build_fake_packet(lp);
+ sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
+ }
+
+ return status;
+}
+
+static int lance_close(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+
+ netif_stop_queue(dev);
+ del_timer_sync(&lp->multicast_timer);
+
+ STOP_LANCE(lp);
+
+ free_irq(dev->irq, (void *) dev);
+ return 0;
+}
+
+static int lance_reset(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ int status;
+
+ STOP_LANCE(lp);
+
+ /* On the 4m, reset the dma too */
+ if (lp->dregs) {
+ u32 csr, addr;
+
+ printk(KERN_ERR "resetting ledma\n");
+ csr = sbus_readl(lp->dregs + DMA_CSR);
+ sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
+ udelay(200);
+ sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
+
+ addr = lp->init_block_dvma & 0xff000000;
+ sbus_writel(addr, lp->dregs + DMA_TEST);
+ }
+ lp->init_ring(dev);
+ load_csrs(lp);
+ netif_trans_update(dev); /* prevent tx timeout */
+ status = init_restart_lance(lp);
+ return status;
+}
+
+static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
+{
+ void __iomem *piobuf = dest;
+ u32 *p32;
+ u16 *p16;
+ u8 *p8;
+
+ switch ((unsigned long)src & 0x3) {
+ case 0:
+ p32 = (u32 *) src;
+ while (len >= 4) {
+ sbus_writel(*p32, piobuf);
+ p32++;
+ piobuf += 4;
+ len -= 4;
+ }
+ src = (char *) p32;
+ break;
+ case 1:
+ case 3:
+ p8 = (u8 *) src;
+ while (len >= 4) {
+ u32 val;
+
+ val = p8[0] << 24;
+ val |= p8[1] << 16;
+ val |= p8[2] << 8;
+ val |= p8[3];
+ sbus_writel(val, piobuf);
+ p8 += 4;
+ piobuf += 4;
+ len -= 4;
+ }
+ src = (char *) p8;
+ break;
+ case 2:
+ p16 = (u16 *) src;
+ while (len >= 4) {
+ u32 val = p16[0]<<16 | p16[1];
+ sbus_writel(val, piobuf);
+ p16 += 2;
+ piobuf += 4;
+ len -= 4;
+ }
+ src = (char *) p16;
+ break;
+ }
+ if (len >= 2) {
+ u16 val = src[0] << 8 | src[1];
+ sbus_writew(val, piobuf);
+ src += 2;
+ piobuf += 2;
+ len -= 2;
+ }
+ if (len >= 1)
+ sbus_writeb(src[0], piobuf);
+}
+
+static void lance_piozero(void __iomem *dest, int len)
+{
+ void __iomem *piobuf = dest;
+
+ if ((unsigned long)piobuf & 1) {
+ sbus_writeb(0, piobuf);
+ piobuf += 1;
+ len -= 1;
+ if (len == 0)
+ return;
+ }
+ if (len == 1) {
+ sbus_writeb(0, piobuf);
+ return;
+ }
+ if ((unsigned long)piobuf & 2) {
+ sbus_writew(0, piobuf);
+ piobuf += 2;
+ len -= 2;
+ if (len == 0)
+ return;
+ }
+ while (len >= 4) {
+ sbus_writel(0, piobuf);
+ piobuf += 4;
+ len -= 4;
+ }
+ if (len >= 2) {
+ sbus_writew(0, piobuf);
+ piobuf += 2;
+ len -= 2;
+ }
+ if (len >= 1)
+ sbus_writeb(0, piobuf);
+}
+
+static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ struct lance_private *lp = netdev_priv(dev);
+
+ printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
+ dev->name, sbus_readw(lp->lregs + RDP));
+ lance_reset(dev);
+ netif_wake_queue(dev);
+}
+
+static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ int entry, skblen, len;
+
+ skblen = skb->len;
+
+ len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
+
+ spin_lock_irq(&lp->lock);
+
+ dev->stats.tx_bytes += len;
+
+ entry = lp->tx_new & TX_RING_MOD_MASK;
+ if (lp->pio_buffer) {
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
+ sbus_writew(0, &ib->btx_ring[entry].misc);
+ lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
+ if (len != skblen)
+ lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
+ sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
+ } else {
+ struct lance_init_block *ib = lp->init_block_mem;
+ ib->btx_ring [entry].length = (-len) | 0xf000;
+ ib->btx_ring [entry].misc = 0;
+ skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
+ if (len != skblen)
+ memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
+ ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
+ }
+
+ lp->tx_new = TX_NEXT(entry);
+
+ if (TX_BUFFS_AVAIL <= 0)
+ netif_stop_queue(dev);
+
+ /* Kick the lance: transmit now */
+ sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
+
+ /* Read back CSR to invalidate the E-Cache.
+ * This is needed, because DMA_DSBL_WR_INV is set.
+ */
+ if (lp->dregs)
+ sbus_readw(lp->lregs + RDP);
+
+ spin_unlock_irq(&lp->lock);
+
+ dev_kfree_skb(skb);
+
+ return NETDEV_TX_OK;
+}
+
+/* taken from the depca driver */
+static void lance_load_multicast(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct netdev_hw_addr *ha;
+ u32 crc;
+ u32 val;
+
+ /* set all multicast bits */
+ if (dev->flags & IFF_ALLMULTI)
+ val = ~0;
+ else
+ val = 0;
+
+ if (lp->pio_buffer) {
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ sbus_writel(val, &ib->filter[0]);
+ sbus_writel(val, &ib->filter[1]);
+ } else {
+ struct lance_init_block *ib = lp->init_block_mem;
+ ib->filter [0] = val;
+ ib->filter [1] = val;
+ }
+
+ if (dev->flags & IFF_ALLMULTI)
+ return;
+
+ /* Add addresses */
+ netdev_for_each_mc_addr(ha, dev) {
+ crc = ether_crc_le(6, ha->addr);
+ crc = crc >> 26;
+ if (lp->pio_buffer) {
+ struct lance_init_block __iomem *ib = lp->init_block_iomem;
+ u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
+ u16 tmp = sbus_readw(&mcast_table[crc>>4]);
+ tmp |= 1 << (crc & 0xf);
+ sbus_writew(tmp, &mcast_table[crc>>4]);
+ } else {
+ struct lance_init_block *ib = lp->init_block_mem;
+ u16 *mcast_table = (u16 *) &ib->filter;
+ mcast_table [crc >> 4] |= 1 << (crc & 0xf);
+ }
+ }
+}
+
+static void lance_set_multicast(struct net_device *dev)
+{
+ struct lance_private *lp = netdev_priv(dev);
+ struct lance_init_block *ib_mem = lp->init_block_mem;
+ struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
+ u16 mode;
+
+ if (!netif_running(dev))
+ return;
+
+ if (lp->tx_old != lp->tx_new) {
+ mod_timer(&lp->multicast_timer, jiffies + 4);
+ netif_wake_queue(dev);
+ return;
+ }
+
+ netif_stop_queue(dev);
+
+ STOP_LANCE(lp);
+ lp->init_ring(dev);
+
+ if (lp->pio_buffer)
+ mode = sbus_readw(&ib_iomem->mode);
+ else
+ mode = ib_mem->mode;
+ if (dev->flags & IFF_PROMISC) {
+ mode |= LE_MO_PROM;
+ if (lp->pio_buffer)
+ sbus_writew(mode, &ib_iomem->mode);
+ else
+ ib_mem->mode = mode;
+ } else {
+ mode &= ~LE_MO_PROM;
+ if (lp->pio_buffer)
+ sbus_writew(mode, &ib_iomem->mode);
+ else
+ ib_mem->mode = mode;
+ lance_load_multicast(dev);
+ }
+ load_csrs(lp);
+ init_restart_lance(lp);
+ netif_wake_queue(dev);
+}
+
+static void lance_set_multicast_retry(struct timer_list *t)
+{
+ struct lance_private *lp = from_timer(lp, t, multicast_timer);
+ struct net_device *dev = lp->dev;
+
+ lance_set_multicast(dev);
+}
+
+static void lance_free_hwresources(struct lance_private *lp)
+{
+ if (lp->lregs)
+ of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
+ if (lp->dregs) {
+ struct platform_device *ledma = lp->ledma;
+
+ of_iounmap(&ledma->resource[0], lp->dregs,
+ resource_size(&ledma->resource[0]));
+ }
+ if (lp->init_block_iomem) {
+ of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
+ sizeof(struct lance_init_block));
+ } else if (lp->init_block_mem) {
+ dma_free_coherent(&lp->op->dev,
+ sizeof(struct lance_init_block),
+ lp->init_block_mem,
+ lp->init_block_dvma);
+ }
+}
+
+/* Ethtool support... */
+static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ strlcpy(info->driver, "sunlance", sizeof(info->driver));
+}
+
+static const struct ethtool_ops sparc_lance_ethtool_ops = {
+ .get_drvinfo = sparc_lance_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+};
+
+static const struct net_device_ops sparc_lance_ops = {
+ .ndo_open = lance_open,
+ .ndo_stop = lance_close,
+ .ndo_start_xmit = lance_start_xmit,
+ .ndo_set_rx_mode = lance_set_multicast,
+ .ndo_tx_timeout = lance_tx_timeout,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static int sparc_lance_probe_one(struct platform_device *op,
+ struct platform_device *ledma,
+ struct platform_device *lebuffer)
+{
+ struct device_node *dp = op->dev.of_node;
+ struct lance_private *lp;
+ struct net_device *dev;
+ int i;
+
+ dev = alloc_etherdev(sizeof(struct lance_private) + 8);
+ if (!dev)
+ return -ENOMEM;
+
+ lp = netdev_priv(dev);
+
+ spin_lock_init(&lp->lock);
+
+ /* Copy the IDPROM ethernet address to the device structure, later we
+ * will copy the address in the device structure to the lance
+ * initialization block.
+ */
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = idprom->id_ethaddr[i];
+
+ /* Get the IO region */
+ lp->lregs = of_ioremap(&op->resource[0], 0,
+ LANCE_REG_SIZE, lancestr);
+ if (!lp->lregs) {
+ printk(KERN_ERR "SunLance: Cannot map registers.\n");
+ goto fail;
+ }
+
+ lp->ledma = ledma;
+ if (lp->ledma) {
+ lp->dregs = of_ioremap(&ledma->resource[0], 0,
+ resource_size(&ledma->resource[0]),
+ "ledma");
+ if (!lp->dregs) {
+ printk(KERN_ERR "SunLance: Cannot map "
+ "ledma registers.\n");
+ goto fail;
+ }
+ }
+
+ lp->op = op;
+ lp->lebuffer = lebuffer;
+ if (lebuffer) {
+ /* sanity check */
+ if (lebuffer->resource[0].start & 7) {
+ printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
+ goto fail;
+ }
+ lp->init_block_iomem =
+ of_ioremap(&lebuffer->resource[0], 0,
+ sizeof(struct lance_init_block), "lebuffer");
+ if (!lp->init_block_iomem) {
+ printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
+ goto fail;
+ }
+ lp->init_block_dvma = 0;
+ lp->pio_buffer = 1;
+ lp->init_ring = lance_init_ring_pio;
+ lp->rx = lance_rx_pio;
+ lp->tx = lance_tx_pio;
+ } else {
+ lp->init_block_mem =
+ dma_alloc_coherent(&op->dev,
+ sizeof(struct lance_init_block),
+ &lp->init_block_dvma, GFP_ATOMIC);
+ if (!lp->init_block_mem)
+ goto fail;
+
+ lp->pio_buffer = 0;
+ lp->init_ring = lance_init_ring_dvma;
+ lp->rx = lance_rx_dvma;
+ lp->tx = lance_tx_dvma;
+ }
+ lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
+ (LE_C3_BSWP |
+ LE_C3_ACON |
+ LE_C3_BCON));
+
+ lp->name = lancestr;
+
+ lp->burst_sizes = 0;
+ if (lp->ledma) {
+ struct device_node *ledma_dp = ledma->dev.of_node;
+ struct device_node *sbus_dp;
+ unsigned int sbmask;
+ const char *prop;
+ u32 csr;
+
+ /* Find burst-size property for ledma */
+ lp->burst_sizes = of_getintprop_default(ledma_dp,
+ "burst-sizes", 0);
+
+ /* ledma may be capable of fast bursts, but sbus may not. */
+ sbus_dp = ledma_dp->parent;
+ sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
+ DMA_BURSTBITS);
+ lp->burst_sizes &= sbmask;
+
+ /* Get the cable-selection property */
+ prop = of_get_property(ledma_dp, "cable-selection", NULL);
+ if (!prop || prop[0] == '\0') {
+ struct device_node *nd;
+
+ printk(KERN_INFO "SunLance: using "
+ "auto-carrier-detection.\n");
+
+ nd = of_find_node_by_path("/options");
+ if (!nd)
+ goto no_link_test;
+
+ prop = of_get_property(nd, "tpe-link-test?", NULL);
+ if (!prop)
+ goto node_put;
+
+ if (strcmp(prop, "true")) {
+ printk(KERN_NOTICE "SunLance: warning: overriding option "
+ "'tpe-link-test?'\n");
+ printk(KERN_NOTICE "SunLance: warning: mail any problems "
+ "to ecd@skynet.be\n");
+ auxio_set_lte(AUXIO_LTE_ON);
+ }
+node_put:
+ of_node_put(nd);
+no_link_test:
+ lp->auto_select = 1;
+ lp->tpe = 0;
+ } else if (!strcmp(prop, "aui")) {
+ lp->auto_select = 0;
+ lp->tpe = 0;
+ } else {
+ lp->auto_select = 0;
+ lp->tpe = 1;
+ }
+
+ /* Reset ledma */
+ csr = sbus_readl(lp->dregs + DMA_CSR);
+ sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
+ udelay(200);
+ sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
+ } else
+ lp->dregs = NULL;
+
+ lp->dev = dev;
+ SET_NETDEV_DEV(dev, &op->dev);
+ dev->watchdog_timeo = 5*HZ;
+ dev->ethtool_ops = &sparc_lance_ethtool_ops;
+ dev->netdev_ops = &sparc_lance_ops;
+
+ dev->irq = op->archdata.irqs[0];
+
+ /* We cannot sleep if the chip is busy during a
+ * multicast list update event, because such events
+ * can occur from interrupts (ex. IPv6). So we
+ * use a timer to try again later when necessary. -DaveM
+ */
+ timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
+
+ if (register_netdev(dev)) {
+ printk(KERN_ERR "SunLance: Cannot register device.\n");
+ goto fail;
+ }
+
+ platform_set_drvdata(op, lp);
+
+ printk(KERN_INFO "%s: LANCE %pM\n",
+ dev->name, dev->dev_addr);
+
+ return 0;
+
+fail:
+ lance_free_hwresources(lp);
+ free_netdev(dev);
+ return -ENODEV;
+}
+
+static int sunlance_sbus_probe(struct platform_device *op)
+{
+ struct platform_device *parent = to_platform_device(op->dev.parent);
+ struct device_node *parent_dp = parent->dev.of_node;
+ int err;
+
+ if (of_node_name_eq(parent_dp, "ledma")) {
+ err = sparc_lance_probe_one(op, parent, NULL);
+ } else if (of_node_name_eq(parent_dp, "lebuffer")) {
+ err = sparc_lance_probe_one(op, NULL, parent);
+ } else
+ err = sparc_lance_probe_one(op, NULL, NULL);
+
+ return err;
+}
+
+static int sunlance_sbus_remove(struct platform_device *op)
+{
+ struct lance_private *lp = platform_get_drvdata(op);
+ struct net_device *net_dev = lp->dev;
+
+ unregister_netdev(net_dev);
+
+ lance_free_hwresources(lp);
+
+ free_netdev(net_dev);
+
+ return 0;
+}
+
+static const struct of_device_id sunlance_sbus_match[] = {
+ {
+ .name = "le",
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
+
+static struct platform_driver sunlance_sbus_driver = {
+ .driver = {
+ .name = "sunlance",
+ .of_match_table = sunlance_sbus_match,
+ },
+ .probe = sunlance_sbus_probe,
+ .remove = sunlance_sbus_remove,
+};
+
+module_platform_driver(sunlance_sbus_driver);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 20:51:36 +0000