diff options
Diffstat (limited to 'drivers/net/ethernet/amd/mvme147.c')
| -rw-r--r-- | drivers/net/ethernet/amd/mvme147.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/drivers/net/ethernet/amd/mvme147.c b/drivers/net/ethernet/amd/mvme147.c new file mode 100644 index 000000000..410c7b67e --- /dev/null +++ b/drivers/net/ethernet/amd/mvme147.c @@ -0,0 +1,198 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* mvme147.c : the Linux/mvme147/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> +#include <linux/gfp.h> +#include <linux/pgtable.h> +/* Used for the temporal inet entries and routing */ +#include <linux/socket.h> +#include <linux/route.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> + +#include <asm/io.h> +#include <asm/mvme147hw.h> + +/* We have 32K 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, it takes (8 + 2) * 1544 bytes. + */ +#define LANCE_LOG_TX_BUFFERS 1 +#define LANCE_LOG_RX_BUFFERS 3 + +#include "7990.h" /* use generic LANCE code */ + +/* Our private data structure */ +struct m147lance_private { + struct lance_private lance; + unsigned long ram; +}; + +/* 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 m147lance_open(struct net_device *dev); +static int m147lance_close(struct net_device *dev); +static void m147lance_writerap(struct lance_private *lp, unsigned short value); +static void m147lance_writerdp(struct lance_private *lp, unsigned short value); +static unsigned short m147lance_readrdp(struct lance_private *lp); + +typedef void (*writerap_t)(void *, unsigned short); +typedef void (*writerdp_t)(void *, unsigned short); +typedef unsigned short (*readrdp_t)(void *); + +static const struct net_device_ops lance_netdev_ops = { + .ndo_open = m147lance_open, + .ndo_stop = m147lance_close, + .ndo_start_xmit = lance_start_xmit, + .ndo_set_rx_mode = lance_set_multicast, + .ndo_tx_timeout = lance_tx_timeout, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +}; + +/* Initialise the one and only on-board 7990 */ +static struct net_device * __init mvme147lance_probe(void) +{ + struct net_device *dev; + static int called; + static const char name[] = "MVME147 LANCE"; + struct m147lance_private *lp; + u8 macaddr[ETH_ALEN]; + u_long *addr; + u_long address; + int err; + + if (!MACH_IS_MVME147 || called) + return ERR_PTR(-ENODEV); + called++; + + dev = alloc_etherdev(sizeof(struct m147lance_private)); + if (!dev) + return ERR_PTR(-ENOMEM); + + /* Fill the dev fields */ + dev->base_addr = (unsigned long)MVME147_LANCE_BASE; + dev->netdev_ops = &lance_netdev_ops; + dev->dma = 0; + + addr = (u_long *)ETHERNET_ADDRESS; + address = *addr; + macaddr[0] = 0x08; + macaddr[1] = 0x00; + macaddr[2] = 0x3e; + address = address >> 8; + macaddr[5] = address&0xff; + address = address >> 8; + macaddr[4] = address&0xff; + address = address >> 8; + macaddr[3] = address&0xff; + eth_hw_addr_set(dev, macaddr); + + printk("%s: MVME147 at 0x%08lx, irq %d, Hardware Address %pM\n", + dev->name, dev->base_addr, MVME147_LANCE_IRQ, + dev->dev_addr); + + lp = netdev_priv(dev); + lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 32K */ + if (!lp->ram) { + printk("%s: No memory for LANCE buffers\n", dev->name); + free_netdev(dev); + return ERR_PTR(-ENOMEM); + } + + lp->lance.name = name; + lp->lance.base = dev->base_addr; + lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ + lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ + lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ + lp->lance.irq = MVME147_LANCE_IRQ; + lp->lance.writerap = (writerap_t)m147lance_writerap; + lp->lance.writerdp = (writerdp_t)m147lance_writerdp; + lp->lance.readrdp = (readrdp_t)m147lance_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; + + err = register_netdev(dev); + if (err) { + free_pages(lp->ram, 3); + free_netdev(dev); + return ERR_PTR(err); + } + + return dev; +} + +static void m147lance_writerap(struct lance_private *lp, unsigned short value) +{ + out_be16(lp->base + LANCE_RAP, value); +} + +static void m147lance_writerdp(struct lance_private *lp, unsigned short value) +{ + out_be16(lp->base + LANCE_RDP, value); +} + +static unsigned short m147lance_readrdp(struct lance_private *lp) +{ + return in_be16(lp->base + LANCE_RDP); +} + +static int m147lance_open(struct net_device *dev) +{ + int status; + + status = lance_open(dev); /* call generic lance open code */ + if (status) + return status; + /* enable interrupts at board level. */ + m147_pcc->lan_cntrl = 0; /* clear the interrupts (if any) */ + m147_pcc->lan_cntrl = 0x08 | 0x04; /* Enable irq 4 */ + + return 0; +} + +static int m147lance_close(struct net_device *dev) +{ + /* disable interrupts at boardlevel */ + m147_pcc->lan_cntrl = 0x0; /* disable interrupts */ + lance_close(dev); + return 0; +} + +MODULE_LICENSE("GPL"); + +static struct net_device *dev_mvme147_lance; +static int __init m147lance_init(void) +{ + dev_mvme147_lance = mvme147lance_probe(); + return PTR_ERR_OR_ZERO(dev_mvme147_lance); +} +module_init(m147lance_init); + +static void __exit m147lance_exit(void) +{ + struct m147lance_private *lp = netdev_priv(dev_mvme147_lance); + unregister_netdev(dev_mvme147_lance); + free_pages(lp->ram, 3); + free_netdev(dev_mvme147_lance); +} +module_exit(m147lance_exit); |