458 lines
13 KiB
C
458 lines
13 KiB
C
/*
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* Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver
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*
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* (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM)
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*
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* ---------------------------------------------------------------------------
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*
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* This program is based on all the other NE2000 drivers for Linux
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*
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* ---------------------------------------------------------------------------
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of the Linux
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* distribution for more details.
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*
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* ---------------------------------------------------------------------------
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*
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* The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS
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* Ethernet Controllers.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/zorro.h>
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#include <linux/jiffies.h>
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#include <asm/irq.h>
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#include <asm/amigaints.h>
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#include <asm/amigahw.h>
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#define EI_SHIFT(x) (ei_local->reg_offset[x])
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#define ei_inb(port) in_8(port)
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#define ei_outb(val, port) out_8(port, val)
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#define ei_inb_p(port) in_8(port)
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#define ei_outb_p(val, port) out_8(port, val)
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static const char version[] =
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"8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
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static u32 zorro8390_msg_enable;
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#include "lib8390.c"
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#define DRV_NAME "zorro8390"
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#define NE_BASE (dev->base_addr)
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#define NE_CMD (0x00 * 2)
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#define NE_DATAPORT (0x10 * 2) /* NatSemi-defined port window offset */
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#define NE_RESET (0x1f * 2) /* Issue a read to reset,
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* a write to clear. */
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#define NE_IO_EXTENT (0x20 * 2)
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#define NE_EN0_ISR (0x07 * 2)
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#define NE_EN0_DCFG (0x0e * 2)
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#define NE_EN0_RSARLO (0x08 * 2)
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#define NE_EN0_RSARHI (0x09 * 2)
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#define NE_EN0_RCNTLO (0x0a * 2)
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#define NE_EN0_RXCR (0x0c * 2)
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#define NE_EN0_TXCR (0x0d * 2)
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#define NE_EN0_RCNTHI (0x0b * 2)
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#define NE_EN0_IMR (0x0f * 2)
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#define NESM_START_PG 0x40 /* First page of TX buffer */
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#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
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#define WORDSWAP(a) ((((a) >> 8) & 0xff) | ((a) << 8))
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static struct card_info {
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zorro_id id;
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const char *name;
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unsigned int offset;
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} cards[] = {
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{ ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
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{ ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
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};
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/* Hard reset the card. This used to pause for the same period that a
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* 8390 reset command required, but that shouldn't be necessary.
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*/
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static void zorro8390_reset_8390(struct net_device *dev)
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{
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unsigned long reset_start_time = jiffies;
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struct ei_device *ei_local = netdev_priv(dev);
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netif_dbg(ei_local, hw, dev, "resetting - t=%ld...\n", jiffies);
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z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
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ei_status.txing = 0;
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ei_status.dmaing = 0;
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/* This check _should_not_ be necessary, omit eventually. */
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while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RESET) == 0)
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if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
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netdev_warn(dev, "%s: did not complete\n", __func__);
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break;
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}
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z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr */
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}
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/* Grab the 8390 specific header. Similar to the block_input routine, but
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* we don't need to be concerned with ring wrap as the header will be at
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* the start of a page, so we optimize accordingly.
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*/
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static void zorro8390_get_8390_hdr(struct net_device *dev,
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struct e8390_pkt_hdr *hdr, int ring_page)
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{
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int nic_base = dev->base_addr;
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int cnt;
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short *ptrs;
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/* This *shouldn't* happen.
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* If it does, it's the last thing you'll see
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*/
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if (ei_status.dmaing) {
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netdev_warn(dev,
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"%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
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__func__, ei_status.dmaing, ei_status.irqlock);
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return;
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}
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ei_status.dmaing |= 0x01;
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z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
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z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
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z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
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z_writeb(0, nic_base + NE_EN0_RCNTHI);
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z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
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z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
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z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
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ptrs = (short *)hdr;
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for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++)
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*ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
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z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
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hdr->count = WORDSWAP(hdr->count);
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ei_status.dmaing &= ~0x01;
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}
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/* Block input and output, similar to the Crynwr packet driver.
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* If you are porting to a new ethercard, look at the packet driver source
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* for hints. The NEx000 doesn't share the on-board packet memory --
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* you have to put the packet out through the "remote DMA" dataport
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* using z_writeb.
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*/
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static void zorro8390_block_input(struct net_device *dev, int count,
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struct sk_buff *skb, int ring_offset)
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{
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int nic_base = dev->base_addr;
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char *buf = skb->data;
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short *ptrs;
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int cnt;
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/* This *shouldn't* happen.
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* If it does, it's the last thing you'll see
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*/
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if (ei_status.dmaing) {
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netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
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__func__, ei_status.dmaing, ei_status.irqlock);
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return;
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}
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ei_status.dmaing |= 0x01;
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z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
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z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
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z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
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z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
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z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
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z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
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z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
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ptrs = (short *)buf;
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for (cnt = 0; cnt < count >> 1; cnt++)
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*ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
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if (count & 0x01)
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buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT);
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z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
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ei_status.dmaing &= ~0x01;
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}
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static void zorro8390_block_output(struct net_device *dev, int count,
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const unsigned char *buf,
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const int start_page)
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{
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int nic_base = NE_BASE;
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unsigned long dma_start;
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short *ptrs;
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int cnt;
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/* Round the count up for word writes. Do we need to do this?
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* What effect will an odd byte count have on the 8390?
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* I should check someday.
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*/
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if (count & 0x01)
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count++;
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/* This *shouldn't* happen.
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* If it does, it's the last thing you'll see
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*/
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if (ei_status.dmaing) {
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netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
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__func__, ei_status.dmaing, ei_status.irqlock);
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return;
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}
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ei_status.dmaing |= 0x01;
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/* We should already be in page 0, but to be safe... */
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z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
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z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
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/* Now the normal output. */
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z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
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z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
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z_writeb(0x00, nic_base + NE_EN0_RSARLO);
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z_writeb(start_page, nic_base + NE_EN0_RSARHI);
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z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD);
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ptrs = (short *)buf;
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for (cnt = 0; cnt < count >> 1; cnt++)
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z_writew(*ptrs++, NE_BASE + NE_DATAPORT);
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dma_start = jiffies;
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while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
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if (time_after(jiffies, dma_start + 2 * HZ / 100)) {
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/* 20ms */
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netdev_warn(dev, "timeout waiting for Tx RDC\n");
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zorro8390_reset_8390(dev);
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__NS8390_init(dev, 1);
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break;
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}
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z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
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ei_status.dmaing &= ~0x01;
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}
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static int zorro8390_open(struct net_device *dev)
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{
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__ei_open(dev);
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return 0;
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}
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static int zorro8390_close(struct net_device *dev)
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{
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struct ei_device *ei_local = netdev_priv(dev);
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netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard\n");
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__ei_close(dev);
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return 0;
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}
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static void zorro8390_remove_one(struct zorro_dev *z)
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{
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struct net_device *dev = zorro_get_drvdata(z);
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unregister_netdev(dev);
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free_irq(IRQ_AMIGA_PORTS, dev);
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release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2);
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free_netdev(dev);
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}
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static struct zorro_device_id zorro8390_zorro_tbl[] = {
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{ ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
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{ ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
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{ 0 }
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};
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MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl);
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static const struct net_device_ops zorro8390_netdev_ops = {
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.ndo_open = zorro8390_open,
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.ndo_stop = zorro8390_close,
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.ndo_start_xmit = __ei_start_xmit,
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.ndo_tx_timeout = __ei_tx_timeout,
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.ndo_get_stats = __ei_get_stats,
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.ndo_set_rx_mode = __ei_set_multicast_list,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_mac_address = eth_mac_addr,
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#ifdef CONFIG_NET_POLL_CONTROLLER
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.ndo_poll_controller = __ei_poll,
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#endif
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};
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static int zorro8390_init(struct net_device *dev, unsigned long board,
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const char *name, void __iomem *ioaddr)
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{
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int i;
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int err;
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unsigned char SA_prom[32];
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int start_page, stop_page;
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struct ei_device *ei_local = netdev_priv(dev);
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static u32 zorro8390_offsets[16] = {
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0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
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0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
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};
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/* Reset card. Who knows what dain-bramaged state it was left in. */
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{
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unsigned long reset_start_time = jiffies;
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z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
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while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
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if (time_after(jiffies,
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reset_start_time + 2 * HZ / 100)) {
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netdev_warn(dev, "not found (no reset ack)\n");
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return -ENODEV;
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}
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z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
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}
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/* Read the 16 bytes of station address PROM.
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* We must first initialize registers,
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* similar to NS8390_init(eifdev, 0).
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* We can't reliably read the SAPROM address without this.
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* (I learned the hard way!).
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*/
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{
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static const struct {
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u32 value;
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u32 offset;
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} program_seq[] = {
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{E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD},
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/* Select page 0 */
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{0x48, NE_EN0_DCFG}, /* 0x48: Set byte-wide access */
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{0x00, NE_EN0_RCNTLO}, /* Clear the count regs */
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{0x00, NE_EN0_RCNTHI},
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{0x00, NE_EN0_IMR}, /* Mask completion irq */
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{0xFF, NE_EN0_ISR},
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{E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
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{E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */
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{32, NE_EN0_RCNTLO},
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{0x00, NE_EN0_RCNTHI},
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{0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000 */
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{0x00, NE_EN0_RSARHI},
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{E8390_RREAD + E8390_START, NE_CMD},
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};
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for (i = 0; i < ARRAY_SIZE(program_seq); i++)
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z_writeb(program_seq[i].value,
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ioaddr + program_seq[i].offset);
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}
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for (i = 0; i < 16; i++) {
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SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
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(void)z_readb(ioaddr + NE_DATAPORT);
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}
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/* We must set the 8390 for word mode. */
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z_writeb(0x49, ioaddr + NE_EN0_DCFG);
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start_page = NESM_START_PG;
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stop_page = NESM_STOP_PG;
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dev->base_addr = (unsigned long)ioaddr;
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dev->irq = IRQ_AMIGA_PORTS;
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/* Install the Interrupt handler */
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i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt,
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IRQF_SHARED, DRV_NAME, dev);
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if (i)
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return i;
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for (i = 0; i < ETH_ALEN; i++)
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dev->dev_addr[i] = SA_prom[i];
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pr_debug("Found ethernet address: %pM\n", dev->dev_addr);
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ei_status.name = name;
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ei_status.tx_start_page = start_page;
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ei_status.stop_page = stop_page;
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ei_status.word16 = 1;
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ei_status.rx_start_page = start_page + TX_PAGES;
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ei_status.reset_8390 = zorro8390_reset_8390;
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ei_status.block_input = zorro8390_block_input;
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ei_status.block_output = zorro8390_block_output;
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ei_status.get_8390_hdr = zorro8390_get_8390_hdr;
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ei_status.reg_offset = zorro8390_offsets;
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dev->netdev_ops = &zorro8390_netdev_ops;
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__NS8390_init(dev, 0);
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ei_local->msg_enable = zorro8390_msg_enable;
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err = register_netdev(dev);
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if (err) {
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free_irq(IRQ_AMIGA_PORTS, dev);
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return err;
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}
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netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n",
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name, board, dev->dev_addr);
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return 0;
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}
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static int zorro8390_init_one(struct zorro_dev *z,
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const struct zorro_device_id *ent)
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{
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struct net_device *dev;
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unsigned long board, ioaddr;
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int err, i;
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for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--)
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if (z->id == cards[i].id)
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break;
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if (i < 0)
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return -ENODEV;
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board = z->resource.start;
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ioaddr = board + cards[i].offset;
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dev = ____alloc_ei_netdev(0);
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if (!dev)
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return -ENOMEM;
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if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) {
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free_netdev(dev);
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return -EBUSY;
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}
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err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr));
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if (err) {
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release_mem_region(ioaddr, NE_IO_EXTENT * 2);
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free_netdev(dev);
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return err;
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}
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zorro_set_drvdata(z, dev);
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return 0;
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}
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static struct zorro_driver zorro8390_driver = {
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.name = "zorro8390",
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.id_table = zorro8390_zorro_tbl,
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.probe = zorro8390_init_one,
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.remove = zorro8390_remove_one,
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};
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static int __init zorro8390_init_module(void)
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{
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return zorro_register_driver(&zorro8390_driver);
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}
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static void __exit zorro8390_cleanup_module(void)
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{
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zorro_unregister_driver(&zorro8390_driver);
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}
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module_init(zorro8390_init_module);
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module_exit(zorro8390_cleanup_module);
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MODULE_LICENSE("GPL");
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