| /* hplance.c : the Linux/hp300/lance ethernet driver |
| * |
| * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> |
| * Based on the Sun Lance driver and the NetBSD HP Lance driver |
| * Uses the generic 7990.c LANCE code. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/interrupt.h> |
| #include <linux/ioport.h> |
| #include <linux/string.h> |
| #include <linux/delay.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| /* Used for the temporal inet entries and routing */ |
| #include <linux/socket.h> |
| #include <linux/route.h> |
| #include <linux/dio.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| |
| #include <asm/io.h> |
| #include <asm/pgtable.h> |
| |
| #include "hplance.h" |
| |
| /* We have 16834 bytes of RAM for the init block and buffers. This places |
| * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx |
| * buffers and 2 Tx buffers. |
| */ |
| #define LANCE_LOG_TX_BUFFERS 1 |
| #define LANCE_LOG_RX_BUFFERS 3 |
| |
| #include "7990.h" /* use generic LANCE code */ |
| |
| /* Our private data structure */ |
| struct hplance_private { |
| struct lance_private lance; |
| }; |
| |
| /* function prototypes... This is easy because all the grot is in the |
| * generic LANCE support. All we have to support is probing for boards, |
| * plus board-specific init, open and close actions. |
| * Oh, and we need to tell the generic code how to read and write LANCE registers... |
| */ |
| static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent); |
| static void hplance_init(struct net_device *dev, struct dio_dev *d); |
| static void hplance_remove_one(struct dio_dev *d); |
| static void hplance_writerap(void *priv, unsigned short value); |
| static void hplance_writerdp(void *priv, unsigned short value); |
| static unsigned short hplance_readrdp(void *priv); |
| static int hplance_open(struct net_device *dev); |
| static int hplance_close(struct net_device *dev); |
| |
| static struct dio_device_id hplance_dio_tbl[] = { |
| { DIO_ID_LAN }, |
| { 0 } |
| }; |
| |
| static struct dio_driver hplance_driver = { |
| .name = "hplance", |
| .id_table = hplance_dio_tbl, |
| .probe = hplance_init_one, |
| .remove = hplance_remove_one, |
| }; |
| |
| static const struct net_device_ops hplance_netdev_ops = { |
| .ndo_open = hplance_open, |
| .ndo_stop = hplance_close, |
| .ndo_start_xmit = lance_start_xmit, |
| .ndo_set_rx_mode = lance_set_multicast, |
| .ndo_change_mtu = eth_change_mtu, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = eth_mac_addr, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = lance_poll, |
| #endif |
| }; |
| |
| /* Find all the HP Lance boards and initialise them... */ |
| static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent) |
| { |
| struct net_device *dev; |
| int err = -ENOMEM; |
| |
| dev = alloc_etherdev(sizeof(struct hplance_private)); |
| if (!dev) |
| goto out; |
| |
| err = -EBUSY; |
| if (!request_mem_region(dio_resource_start(d), |
| dio_resource_len(d), d->name)) |
| goto out_free_netdev; |
| |
| hplance_init(dev, d); |
| err = register_netdev(dev); |
| if (err) |
| goto out_release_mem_region; |
| |
| dio_set_drvdata(d, dev); |
| |
| printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n", |
| dev->name, d->name, d->scode, dev->dev_addr, d->ipl); |
| |
| return 0; |
| |
| out_release_mem_region: |
| release_mem_region(dio_resource_start(d), dio_resource_len(d)); |
| out_free_netdev: |
| free_netdev(dev); |
| out: |
| return err; |
| } |
| |
| static void hplance_remove_one(struct dio_dev *d) |
| { |
| struct net_device *dev = dio_get_drvdata(d); |
| |
| unregister_netdev(dev); |
| release_mem_region(dio_resource_start(d), dio_resource_len(d)); |
| free_netdev(dev); |
| } |
| |
| /* Initialise a single lance board at the given DIO device */ |
| static void hplance_init(struct net_device *dev, struct dio_dev *d) |
| { |
| unsigned long va = (d->resource.start + DIO_VIRADDRBASE); |
| struct hplance_private *lp; |
| int i; |
| |
| /* reset the board */ |
| out_8(va + DIO_IDOFF, 0xff); |
| udelay(100); /* ariba! ariba! udelay! udelay! */ |
| |
| /* Fill the dev fields */ |
| dev->base_addr = va; |
| dev->netdev_ops = &hplance_netdev_ops; |
| dev->dma = 0; |
| |
| for (i = 0; i < 6; i++) { |
| /* The NVRAM holds our ethernet address, one nibble per byte, |
| * at bytes NVRAMOFF+1,3,5,7,9... |
| */ |
| dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) |
| | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); |
| } |
| |
| lp = netdev_priv(dev); |
| lp->lance.name = d->name; |
| lp->lance.base = va; |
| lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ |
| lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */ |
| lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ |
| lp->lance.irq = d->ipl; |
| lp->lance.writerap = hplance_writerap; |
| lp->lance.writerdp = hplance_writerdp; |
| lp->lance.readrdp = hplance_readrdp; |
| lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; |
| lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; |
| lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; |
| lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; |
| } |
| |
| /* This is disgusting. We have to check the DIO status register for ack every |
| * time we read or write the LANCE registers. |
| */ |
| static void hplance_writerap(void *priv, unsigned short value) |
| { |
| struct lance_private *lp = (struct lance_private *)priv; |
| do { |
| out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); |
| } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| } |
| |
| static void hplance_writerdp(void *priv, unsigned short value) |
| { |
| struct lance_private *lp = (struct lance_private *)priv; |
| do { |
| out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); |
| } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| } |
| |
| static unsigned short hplance_readrdp(void *priv) |
| { |
| struct lance_private *lp = (struct lance_private *)priv; |
| __u16 value; |
| do { |
| value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); |
| } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| return value; |
| } |
| |
| static int hplance_open(struct net_device *dev) |
| { |
| int status; |
| struct lance_private *lp = netdev_priv(dev); |
| |
| status = lance_open(dev); /* call generic lance open code */ |
| if (status) |
| return status; |
| /* enable interrupts at board level. */ |
| out_8(lp->base + HPLANCE_STATUS, LE_IE); |
| |
| return 0; |
| } |
| |
| static int hplance_close(struct net_device *dev) |
| { |
| struct lance_private *lp = netdev_priv(dev); |
| |
| out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */ |
| lance_close(dev); |
| return 0; |
| } |
| |
| static int __init hplance_init_module(void) |
| { |
| return dio_register_driver(&hplance_driver); |
| } |
| |
| static void __exit hplance_cleanup_module(void) |
| { |
| dio_unregister_driver(&hplance_driver); |
| } |
| |
| module_init(hplance_init_module); |
| module_exit(hplance_cleanup_module); |
| |
| MODULE_LICENSE("GPL"); |