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/drivers/net/mvme147.c

https://gitlab.com/TeamCarbonXtreme/android_kernel_samsung_bcm21553-common
C | 205 lines | 154 code | 30 blank | 21 comment | 8 complexity | 93b355be760a801c1a5b204211098216 MD5 | raw file
  1/* mvme147.c  : the  Linux/mvme147/lance ethernet driver
  2 *
  3 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
  4 * Based on the Sun Lance driver and the NetBSD HP Lance driver
  5 * Uses the generic 7990.c LANCE code.
  6 */
  7
  8#include <linux/module.h>
  9#include <linux/kernel.h>
 10#include <linux/types.h>
 11#include <linux/interrupt.h>
 12#include <linux/ioport.h>
 13#include <linux/string.h>
 14#include <linux/delay.h>
 15#include <linux/init.h>
 16#include <linux/errno.h>
 17#include <linux/gfp.h>
 18/* Used for the temporal inet entries and routing */
 19#include <linux/socket.h>
 20#include <linux/route.h>
 21#include <linux/netdevice.h>
 22#include <linux/etherdevice.h>
 23#include <linux/skbuff.h>
 24
 25#include <asm/system.h>
 26#include <asm/io.h>
 27#include <asm/pgtable.h>
 28#include <asm/mvme147hw.h>
 29
 30/* We have 16834 bytes 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.
 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 */
 40struct 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 */
 50static int m147lance_open(struct net_device *dev);
 51static int m147lance_close(struct net_device *dev);
 52static void m147lance_writerap(struct lance_private *lp, unsigned short value);
 53static void m147lance_writerdp(struct lance_private *lp, unsigned short value);
 54static unsigned short m147lance_readrdp(struct lance_private *lp);
 55
 56typedef void (*writerap_t)(void *, unsigned short);
 57typedef void (*writerdp_t)(void *, unsigned short);
 58typedef unsigned short (*readrdp_t)(void *);
 59
 60static 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_multicast_list	= lance_set_multicast,
 65	.ndo_tx_timeout		= lance_tx_timeout,
 66	.ndo_change_mtu		= eth_change_mtu,
 67	.ndo_validate_addr	= eth_validate_addr,
 68	.ndo_set_mac_address	= eth_mac_addr,
 69};
 70
 71/* Initialise the one and only on-board 7990 */
 72struct net_device * __init mvme147lance_probe(int unit)
 73{
 74	struct net_device *dev;
 75	static int called;
 76	static const char name[] = "MVME147 LANCE";
 77	struct m147lance_private *lp;
 78	u_long *addr;
 79	u_long address;
 80	int err;
 81
 82	if (!MACH_IS_MVME147 || called)
 83		return ERR_PTR(-ENODEV);
 84	called++;
 85
 86	dev = alloc_etherdev(sizeof(struct m147lance_private));
 87	if (!dev)
 88		return ERR_PTR(-ENOMEM);
 89
 90	if (unit >= 0)
 91		sprintf(dev->name, "eth%d", unit);
 92
 93	/* Fill the dev fields */
 94	dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
 95	dev->netdev_ops = &lance_netdev_ops;
 96	dev->dma = 0;
 97
 98	addr=(u_long *)ETHERNET_ADDRESS;
 99	address = *addr;
100	dev->dev_addr[0]=0x08;
101	dev->dev_addr[1]=0x00;
102	dev->dev_addr[2]=0x3e;
103	address=address>>8;
104	dev->dev_addr[5]=address&0xff;
105	address=address>>8;
106	dev->dev_addr[4]=address&0xff;
107	address=address>>8;
108	dev->dev_addr[3]=address&0xff;
109
110	printk("%s: MVME147 at 0x%08lx, irq %d, "
111	       "Hardware Address %pM\n",
112	       dev->name, dev->base_addr, MVME147_LANCE_IRQ,
113	       dev->dev_addr);
114
115	lp = netdev_priv(dev);
116	lp->ram = __get_dma_pages(GFP_ATOMIC, 3);	/* 16K */
117	if (!lp->ram)
118	{
119		printk("%s: No memory for LANCE buffers\n", dev->name);
120		free_netdev(dev);
121		return ERR_PTR(-ENOMEM);
122	}
123
124	lp->lance.name = (char*)name;                   /* discards const, shut up gcc */
125	lp->lance.base = dev->base_addr;
126	lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */
127	lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram);                 /* LANCE addr of same RAM */
128	lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
129	lp->lance.irq = MVME147_LANCE_IRQ;
130	lp->lance.writerap = (writerap_t)m147lance_writerap;
131	lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
132	lp->lance.readrdp = (readrdp_t)m147lance_readrdp;
133	lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
134	lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
135	lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
136	lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
137
138	err = register_netdev(dev);
139	if (err) {
140		free_pages(lp->ram, 3);
141		free_netdev(dev);
142		return ERR_PTR(err);
143	}
144
145	return dev;
146}
147
148static void m147lance_writerap(struct lance_private *lp, unsigned short value)
149{
150	out_be16(lp->base + LANCE_RAP, value);
151}
152
153static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
154{
155	out_be16(lp->base + LANCE_RDP, value);
156}
157
158static unsigned short m147lance_readrdp(struct lance_private *lp)
159{
160	return in_be16(lp->base + LANCE_RDP);
161}
162
163static int m147lance_open(struct net_device *dev)
164{
165	int status;
166
167	status = lance_open(dev);                 /* call generic lance open code */
168	if (status)
169		return status;
170	/* enable interrupts at board level. */
171	m147_pcc->lan_cntrl=0;       /* clear the interrupts (if any) */
172	m147_pcc->lan_cntrl=0x08 | 0x04;     /* Enable irq 4 */
173
174	return 0;
175}
176
177static int m147lance_close(struct net_device *dev)
178{
179	/* disable interrupts at boardlevel */
180	m147_pcc->lan_cntrl=0x0; /* disable interrupts */
181	lance_close(dev);
182	return 0;
183}
184
185#ifdef MODULE
186MODULE_LICENSE("GPL");
187
188static struct net_device *dev_mvme147_lance;
189int __init init_module(void)
190{
191	dev_mvme147_lance = mvme147lance_probe(-1);
192	if (IS_ERR(dev_mvme147_lance))
193		return PTR_ERR(dev_mvme147_lance);
194	return 0;
195}
196
197void __exit cleanup_module(void)
198{
199	struct m147lance_private *lp = netdev_priv(dev_mvme147_lance);
200	unregister_netdev(dev_mvme147_lance);
201	free_pages(lp->ram, 3);
202	free_netdev(dev_mvme147_lance);
203}
204
205#endif /* MODULE */