/* * Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver * * (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM) * * --------------------------------------------------------------------------- * * This program is based on all the other NE2000 drivers for Linux * * --------------------------------------------------------------------------- * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of the Linux * distribution for more details. * * --------------------------------------------------------------------------- * * The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS * Ethernet Controllers. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/zorro.h> #include <asm/system.h> #include <asm/irq.h> #include <asm/amigaints.h> #include <asm/amigahw.h> #include "8390.h" #define DRV_NAME "zorro8390" #define NE_BASE (dev->base_addr) #define NE_CMD (0x00*2) #define NE_DATAPORT (0x10*2) /* NatSemi-defined port window offset. */ #define NE_RESET (0x1f*2) /* Issue a read to reset, a write to clear. */ #define NE_IO_EXTENT (0x20*2) #define NE_EN0_ISR (0x07*2) #define NE_EN0_DCFG (0x0e*2) #define NE_EN0_RSARLO (0x08*2) #define NE_EN0_RSARHI (0x09*2) #define NE_EN0_RCNTLO (0x0a*2) #define NE_EN0_RXCR (0x0c*2) #define NE_EN0_TXCR (0x0d*2) #define NE_EN0_RCNTHI (0x0b*2) #define NE_EN0_IMR (0x0f*2) #define NESM_START_PG 0x40 /* First page of TX buffer */ #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8)) static struct card_info { zorro_id id; const char *name; unsigned int offset; } cards[] __devinitdata = { { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 }, { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 }, }; static int __devinit zorro8390_init_one(struct zorro_dev *z, const struct zorro_device_id *ent); static int __devinit zorro8390_init(struct net_device *dev, unsigned long board, const char *name, unsigned long ioaddr); static int zorro8390_open(struct net_device *dev); static int zorro8390_close(struct net_device *dev); static void zorro8390_reset_8390(struct net_device *dev); static void zorro8390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page); static void zorro8390_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset); static void zorro8390_block_output(struct net_device *dev, const int count, const unsigned char *buf, const int start_page); static void __devexit zorro8390_remove_one(struct zorro_dev *z); static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = { { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, }, { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, }, { 0 } }; static struct zorro_driver zorro8390_driver = { .name = "zorro8390", .id_table = zorro8390_zorro_tbl, .probe = zorro8390_init_one, .remove = __devexit_p(zorro8390_remove_one), }; static int __devinit zorro8390_init_one(struct zorro_dev *z, const struct zorro_device_id *ent) { struct net_device *dev; unsigned long board, ioaddr; int err, i; for (i = ARRAY_SIZE(cards)-1; i >= 0; i--) if (z->id == cards[i].id) break; board = z->resource.start; ioaddr = board+cards[i].offset; dev = alloc_ei_netdev(); if (!dev) return -ENOMEM; SET_MODULE_OWNER(dev); if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) { free_netdev(dev); return -EBUSY; } if ((err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr)))) { release_mem_region(ioaddr, NE_IO_EXTENT*2); free_netdev(dev); return err; } zorro_set_drvdata(z, dev); return 0; } static int __devinit zorro8390_init(struct net_device *dev, unsigned long board, const char *name, unsigned long ioaddr) { int i; int err; unsigned char SA_prom[32]; int start_page, stop_page; static u32 zorro8390_offsets[16] = { 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, }; /* Reset card. Who knows what dain-bramaged state it was left in. */ { unsigned long reset_start_time = jiffies; z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET); while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0) if (jiffies - reset_start_time > 2*HZ/100) { printk(KERN_WARNING " not found (no reset ack).\n"); return -ENODEV; } z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */ } /* Read the 16 bytes of station address PROM. We must first initialize registers, similar to NS8390_init(eifdev, 0). We can't reliably read the SAPROM address without this. (I learned the hard way!). */ { struct { u32 value; u32 offset; } program_seq[] = { {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/ {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */ {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */ {0x00, NE_EN0_RCNTHI}, {0x00, NE_EN0_IMR}, /* Mask completion irq. */ {0xFF, NE_EN0_ISR}, {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */ {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */ {32, NE_EN0_RCNTLO}, {0x00, NE_EN0_RCNTHI}, {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */ {0x00, NE_EN0_RSARHI}, {E8390_RREAD+E8390_START, NE_CMD}, }; for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) { z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset); } } for (i = 0; i < 16; i++) { SA_prom[i] = z_readb(ioaddr + NE_DATAPORT); (void)z_readb(ioaddr + NE_DATAPORT); } /* We must set the 8390 for word mode. */ z_writeb(0x49, ioaddr + NE_EN0_DCFG); start_page = NESM_START_PG; stop_page = NESM_STOP_PG; dev->base_addr = ioaddr; dev->irq = IRQ_AMIGA_PORTS; /* Install the Interrupt handler */ i = request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ, DRV_NAME, dev); if (i) return i; for(i = 0; i < ETHER_ADDR_LEN; i++) { #ifdef DEBUG printk(" %2.2x", SA_prom[i]); #endif dev->dev_addr[i] = SA_prom[i]; } ei_status.name = name; ei_status.tx_start_page = start_page; ei_status.stop_page = stop_page; ei_status.word16 = 1; ei_status.rx_start_page = start_page + TX_PAGES; ei_status.reset_8390 = &zorro8390_reset_8390; ei_status.block_input = &zorro8390_block_input; ei_status.block_output = &zorro8390_block_output; ei_status.get_8390_hdr = &zorro8390_get_8390_hdr; ei_status.reg_offset = zorro8390_offsets; dev->open = &zorro8390_open; dev->stop = &zorro8390_close; #ifdef CONFIG_NET_POLL_CONTROLLER dev->poll_controller = ei_poll; #endif NS8390_init(dev, 0); err = register_netdev(dev); if (err) { free_irq(IRQ_AMIGA_PORTS, dev); return err; } printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address " "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, name, board, dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); return 0; } static int zorro8390_open(struct net_device *dev) { ei_open(dev); return 0; } static int zorro8390_close(struct net_device *dev) { if (ei_debug > 1) printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name); ei_close(dev); return 0; } /* Hard reset the card. This used to pause for the same period that a 8390 reset command required, but that shouldn't be necessary. */ static void zorro8390_reset_8390(struct net_device *dev) { unsigned long reset_start_time = jiffies; if (ei_debug > 1) printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies); z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET); ei_status.txing = 0; ei_status.dmaing = 0; /* This check _should_not_ be necessary, omit eventually. */ while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0) if (jiffies - reset_start_time > 2*HZ/100) { printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name); break; } z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */ } /* Grab the 8390 specific header. Similar to the block_input routine, but we don't need to be concerned with ring wrap as the header will be at the start of a page, so we optimize accordingly. */ static void zorro8390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) { int nic_base = dev->base_addr; int cnt; short *ptrs; /* This *shouldn't* happen. If it does, it's the last thing you'll see */ if (ei_status.dmaing) { printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr " "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing, ei_status.irqlock); return; } ei_status.dmaing |= 0x01; z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD); z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO); z_writeb(0, nic_base + NE_EN0_RCNTHI); z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */ z_writeb(ring_page, nic_base + NE_EN0_RSARHI); z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD); ptrs = (short*)hdr; for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++) *ptrs++ = z_readw(NE_BASE + NE_DATAPORT); z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */ hdr->count = WORDSWAP(hdr->count); ei_status.dmaing &= ~0x01; } /* Block input and output, similar to the Crynwr packet driver. If you are porting to a new ethercard, look at the packet driver source for hints. The NEx000 doesn't share the on-board packet memory -- you have to put the packet out through the "remote DMA" dataport using z_writeb. */ static void zorro8390_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) { int nic_base = dev->base_addr; char *buf = skb->data; short *ptrs; int cnt; /* This *shouldn't* happen. If it does, it's the last thing you'll see */ if (ei_status.dmaing) { printk(KERN_ERR "%s: DMAing conflict in ne_block_input " "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing, ei_status.irqlock); return; } ei_status.dmaing |= 0x01; z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD); z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO); z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI); z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO); z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI); z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD); ptrs = (short*)buf; for (cnt = 0; cnt < (count>>1); cnt++) *ptrs++ = z_readw(NE_BASE + NE_DATAPORT); if (count & 0x01) buf[count-1] = z_readb(NE_BASE + NE_DATAPORT); z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */ ei_status.dmaing &= ~0x01; } static void zorro8390_block_output(struct net_device *dev, int count, const unsigned char *buf, const int start_page) { int nic_base = NE_BASE; unsigned long dma_start; short *ptrs; int cnt; /* Round the count up for word writes. Do we need to do this? What effect will an odd byte count have on the 8390? I should check someday. */ if (count & 0x01) count++; /* This *shouldn't* happen. If it does, it's the last thing you'll see */ if (ei_status.dmaing) { printk(KERN_ERR "%s: DMAing conflict in ne_block_output." "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing, ei_status.irqlock); return; } ei_status.dmaing |= 0x01; /* We should already be in page 0, but to be safe... */ z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD); z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Now the normal output. */ z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO); z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI); z_writeb(0x00, nic_base + NE_EN0_RSARLO); z_writeb(start_page, nic_base + NE_EN0_RSARHI); z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD); ptrs = (short*)buf; for (cnt = 0; cnt < count>>1; cnt++) z_writew(*ptrs++, NE_BASE+NE_DATAPORT); dma_start = jiffies; while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0) if (jiffies - dma_start > 2*HZ/100) { /* 20ms */ printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n", dev->name); zorro8390_reset_8390(dev); NS8390_init(dev,1); break; } z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */ ei_status.dmaing &= ~0x01; return; } static void __devexit zorro8390_remove_one(struct zorro_dev *z) { struct net_device *dev = zorro_get_drvdata(z); unregister_netdev(dev); free_irq(IRQ_AMIGA_PORTS, dev); release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2); free_netdev(dev); } static int __init zorro8390_init_module(void) { return zorro_module_init(&zorro8390_driver); } static void __exit zorro8390_cleanup_module(void) { zorro_unregister_driver(&zorro8390_driver); } module_init(zorro8390_init_module); module_exit(zorro8390_cleanup_module); MODULE_LICENSE("GPL");