1 // SPDX-License-Identifier: GPL-2.0-only 2 /* mvme147.c : the Linux/mvme147/lance ethernet driver 3 * 4 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> 5 * Based on the Sun Lance driver and the NetBSD HP Lance driver 6 * Uses the generic 7990.c LANCE code. 7 */ 8 9 #include <linux/module.h> 10 #include <linux/kernel.h> 11 #include <linux/types.h> 12 #include <linux/interrupt.h> 13 #include <linux/ioport.h> 14 #include <linux/string.h> 15 #include <linux/delay.h> 16 #include <linux/init.h> 17 #include <linux/errno.h> 18 #include <linux/gfp.h> 19 #include <linux/pgtable.h> 20 /* Used for the temporal inet entries and routing */ 21 #include <linux/socket.h> 22 #include <linux/route.h> 23 #include <linux/netdevice.h> 24 #include <linux/etherdevice.h> 25 #include <linux/skbuff.h> 26 27 #include <asm/io.h> 28 #include <asm/mvme147hw.h> 29 30 /* We have 32K of RAM for the init block and buffers. This places 31 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx 32 * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes. 33 */ 34 #define LANCE_LOG_TX_BUFFERS 1 35 #define LANCE_LOG_RX_BUFFERS 3 36 37 #include "7990.h" /* use generic LANCE code */ 38 39 /* Our private data structure */ 40 struct m147lance_private { 41 struct lance_private lance; 42 unsigned long ram; 43 }; 44 45 /* function prototypes... This is easy because all the grot is in the 46 * generic LANCE support. All we have to support is probing for boards, 47 * plus board-specific init, open and close actions. 48 * Oh, and we need to tell the generic code how to read and write LANCE registers... 49 */ 50 static int m147lance_open(struct net_device *dev); 51 static int m147lance_close(struct net_device *dev); 52 static void m147lance_writerap(struct lance_private *lp, unsigned short value); 53 static void m147lance_writerdp(struct lance_private *lp, unsigned short value); 54 static unsigned short m147lance_readrdp(struct lance_private *lp); 55 56 typedef void (*writerap_t)(void *, unsigned short); 57 typedef void (*writerdp_t)(void *, unsigned short); 58 typedef unsigned short (*readrdp_t)(void *); 59 60 static const struct net_device_ops lance_netdev_ops = { 61 .ndo_open = m147lance_open, 62 .ndo_stop = m147lance_close, 63 .ndo_start_xmit = lance_start_xmit, 64 .ndo_set_rx_mode = lance_set_multicast, 65 .ndo_tx_timeout = lance_tx_timeout, 66 .ndo_validate_addr = eth_validate_addr, 67 .ndo_set_mac_address = eth_mac_addr, 68 }; 69 70 /* Initialise the one and only on-board 7990 */ 71 static struct net_device * __init mvme147lance_probe(void) 72 { 73 struct net_device *dev; 74 static int called; 75 static const char name[] = "MVME147 LANCE"; 76 struct m147lance_private *lp; 77 u_long *addr; 78 u_long address; 79 int err; 80 81 if (!MACH_IS_MVME147 || called) 82 return ERR_PTR(-ENODEV); 83 called++; 84 85 dev = alloc_etherdev(sizeof(struct m147lance_private)); 86 if (!dev) 87 return ERR_PTR(-ENOMEM); 88 89 /* Fill the dev fields */ 90 dev->base_addr = (unsigned long)MVME147_LANCE_BASE; 91 dev->netdev_ops = &lance_netdev_ops; 92 dev->dma = 0; 93 94 addr = (u_long *)ETHERNET_ADDRESS; 95 address = *addr; 96 dev->dev_addr[0] = 0x08; 97 dev->dev_addr[1] = 0x00; 98 dev->dev_addr[2] = 0x3e; 99 address = address >> 8; 100 dev->dev_addr[5] = address&0xff; 101 address = address >> 8; 102 dev->dev_addr[4] = address&0xff; 103 address = address >> 8; 104 dev->dev_addr[3] = address&0xff; 105 106 printk("%s: MVME147 at 0x%08lx, irq %d, Hardware Address %pM\n", 107 dev->name, dev->base_addr, MVME147_LANCE_IRQ, 108 dev->dev_addr); 109 110 lp = netdev_priv(dev); 111 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 32K */ 112 if (!lp->ram) { 113 printk("%s: No memory for LANCE buffers\n", dev->name); 114 free_netdev(dev); 115 return ERR_PTR(-ENOMEM); 116 } 117 118 lp->lance.name = name; 119 lp->lance.base = dev->base_addr; 120 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ 121 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ 122 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 123 lp->lance.irq = MVME147_LANCE_IRQ; 124 lp->lance.writerap = (writerap_t)m147lance_writerap; 125 lp->lance.writerdp = (writerdp_t)m147lance_writerdp; 126 lp->lance.readrdp = (readrdp_t)m147lance_readrdp; 127 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 128 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 129 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 130 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 131 132 err = register_netdev(dev); 133 if (err) { 134 free_pages(lp->ram, 3); 135 free_netdev(dev); 136 return ERR_PTR(err); 137 } 138 139 return dev; 140 } 141 142 static void m147lance_writerap(struct lance_private *lp, unsigned short value) 143 { 144 out_be16(lp->base + LANCE_RAP, value); 145 } 146 147 static void m147lance_writerdp(struct lance_private *lp, unsigned short value) 148 { 149 out_be16(lp->base + LANCE_RDP, value); 150 } 151 152 static unsigned short m147lance_readrdp(struct lance_private *lp) 153 { 154 return in_be16(lp->base + LANCE_RDP); 155 } 156 157 static int m147lance_open(struct net_device *dev) 158 { 159 int status; 160 161 status = lance_open(dev); /* call generic lance open code */ 162 if (status) 163 return status; 164 /* enable interrupts at board level. */ 165 m147_pcc->lan_cntrl = 0; /* clear the interrupts (if any) */ 166 m147_pcc->lan_cntrl = 0x08 | 0x04; /* Enable irq 4 */ 167 168 return 0; 169 } 170 171 static int m147lance_close(struct net_device *dev) 172 { 173 /* disable interrupts at boardlevel */ 174 m147_pcc->lan_cntrl = 0x0; /* disable interrupts */ 175 lance_close(dev); 176 return 0; 177 } 178 179 MODULE_LICENSE("GPL"); 180 181 static struct net_device *dev_mvme147_lance; 182 static int __init m147lance_init(void) 183 { 184 dev_mvme147_lance = mvme147lance_probe(); 185 return PTR_ERR_OR_ZERO(dev_mvme147_lance); 186 } 187 module_init(m147lance_init); 188 189 static void __exit m147lance_exit(void) 190 { 191 struct m147lance_private *lp = netdev_priv(dev_mvme147_lance); 192 unregister_netdev(dev_mvme147_lance); 193 free_pages(lp->ram, 3); 194 free_netdev(dev_mvme147_lance); 195 } 196 module_exit(m147lance_exit); 197