4 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
6 * This driver is based on work from Andreas Busse, but most of
7 * the code is rewritten.
9 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
11 * A driver for the onboard Sonic ethernet controller on Mips Jazz
12 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
13 * perhaps others, too)
16 #include <linux/kernel.h>
17 #include <linux/sched.h>
18 #include <linux/types.h>
19 #include <linux/fcntl.h>
20 #include <linux/interrupt.h>
21 #include <linux/ptrace.h>
22 #include <linux/init.h>
23 #include <linux/ioport.h>
25 #include <linux/slab.h>
26 #include <linux/string.h>
27 #include <linux/delay.h>
28 #include <asm/bootinfo.h>
29 #include <asm/system.h>
30 #include <asm/bitops.h>
31 #include <asm/pgtable.h>
32 #include <asm/segment.h>
36 #include <asm/jazzdma.h>
37 #include <linux/errno.h>
39 #include <linux/netdevice.h>
40 #include <linux/etherdevice.h>
41 #include <linux/skbuff.h>
43 #define SREGS_PAD(n) u16 n;
48 * Macros to access SONIC registers
50 #define SONIC_READ(reg) (*((volatile unsigned int *)base_addr+reg))
52 #define SONIC_WRITE(reg,val) \
54 *((volatile unsigned int *)base_addr+reg) = val; \
58 /* use 0 for production, 1 for verification, >2 for debug */
60 static unsigned int sonic_debug = SONIC_DEBUG;
62 static unsigned int sonic_debug = 1;
66 * Base address and interrupt of the SONIC controller on JAZZ boards
71 } sonic_portlist[] = { {JAZZ_ETHERNET_BASE, JAZZ_ETHERNET_IRQ}, {0, 0}};
74 * We cannot use station (ethernet) address prefixes to detect the
75 * sonic controller since these are board manufacturer depended.
76 * So we check for known Silicon Revision IDs instead.
78 static unsigned short known_revisions[] =
80 0x04, /* Mips Magnum 4000 */
81 0xffff /* end of list */
84 /* Index to functions, as function prototypes. */
86 extern int sonic_probe(struct net_device *dev);
87 static int sonic_probe1(struct net_device *dev, unsigned int base_addr,
92 * Probe for a SONIC ethernet controller on a Mips Jazz board.
93 * Actually probing is superfluous but we're paranoid.
95 int __init sonic_probe(struct net_device *dev)
97 unsigned int base_addr = dev ? dev->base_addr : 0;
101 * Don't probe if we're not running on a Jazz board.
103 if (mips_machgroup != MACH_GROUP_JAZZ)
105 if (base_addr >= KSEG0) /* Check a single specified location. */
106 return sonic_probe1(dev, base_addr, dev->irq);
107 else if (base_addr != 0) /* Don't probe at all. */
110 for (i = 0; sonic_portlist[i].port; i++) {
111 int base_addr = sonic_portlist[i].port;
112 if (check_region(base_addr, 0x100))
114 if (sonic_probe1(dev, base_addr, sonic_portlist[i].irq) == 0)
120 static int __init sonic_probe1(struct net_device *dev, unsigned int base_addr,
123 static unsigned version_printed;
124 unsigned int silicon_revision;
126 struct sonic_local *lp;
130 * get the Silicon Revision ID. If this is one of the known
131 * one assume that we found a SONIC ethernet controller at
132 * the expected location.
134 silicon_revision = SONIC_READ(SONIC_SR);
136 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
139 while (known_revisions[i] != 0xffff
140 && known_revisions[i] != silicon_revision)
143 if (known_revisions[i] == 0xffff) {
144 printk("SONIC ethernet controller not found (0x%4x)\n",
149 if (!request_region(base_addr, 0x100, dev->name))
152 if (sonic_debug && version_printed++ == 0)
155 printk("%s: Sonic ethernet found at 0x%08lx, ", dev->name, base_addr);
157 /* Fill in the 'dev' fields. */
158 dev->base_addr = base_addr;
162 * Put the sonic into software reset, then
163 * retrieve and print the ethernet address.
165 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
166 SONIC_WRITE(SONIC_CEP,0);
167 for (i=0; i<3; i++) {
168 val = SONIC_READ(SONIC_CAP0-i);
169 dev->dev_addr[i*2] = val;
170 dev->dev_addr[i*2+1] = val >> 8;
173 printk("HW Address ");
174 for (i = 0; i < 6; i++) {
175 printk("%2.2x", dev->dev_addr[i]);
180 printk(" IRQ %d\n", irq);
182 /* Initialize the device structure. */
183 if (dev->priv == NULL) {
185 * the memory be located in the same 64kb segment
190 lp = kmalloc(sizeof(*lp), GFP_KERNEL);
191 if ((unsigned long) lp >> 16
192 != ((unsigned long)lp + sizeof(*lp) ) >> 16) {
193 /* FIXME, free the memory later */
197 } while (lp == NULL && i++ < 20);
200 printk("%s: couldn't allocate memory for descriptors\n",
205 memset(lp, 0, sizeof(struct sonic_local));
207 /* get the virtual dma address */
208 lp->cda_laddr = vdma_alloc(PHYSADDR(lp),sizeof(*lp));
209 if (lp->cda_laddr == ~0UL) {
210 printk("%s: couldn't get DMA page entry for "
211 "descriptors\n", dev->name);
215 lp->tda_laddr = lp->cda_laddr + sizeof (lp->cda);
216 lp->rra_laddr = lp->tda_laddr + sizeof (lp->tda);
217 lp->rda_laddr = lp->rra_laddr + sizeof (lp->rra);
219 /* allocate receive buffer area */
220 /* FIXME, maybe we should use skbs */
221 lp->rba = kmalloc(SONIC_NUM_RRS * SONIC_RBSIZE, GFP_KERNEL);
223 printk("%s: couldn't allocate receive buffers\n",
228 /* get virtual dma address */
229 lp->rba_laddr = vdma_alloc(PHYSADDR(lp->rba),
230 SONIC_NUM_RRS * SONIC_RBSIZE);
231 if (lp->rba_laddr == ~0UL) {
232 printk("%s: couldn't get DMA page entry for receive "
233 "buffers\n",dev->name);
237 /* now convert pointer to KSEG1 pointer */
238 lp->rba = (char *)KSEG1ADDR(lp->rba);
240 dev->priv = (struct sonic_local *)KSEG1ADDR(lp);
243 lp = (struct sonic_local *)dev->priv;
244 dev->open = sonic_open;
245 dev->stop = sonic_close;
246 dev->hard_start_xmit = sonic_send_packet;
247 dev->get_stats = sonic_get_stats;
248 dev->set_multicast_list = &sonic_multicast_list;
249 dev->watchdog_timeo = TX_TIMEOUT;
252 * clear tally counter
254 SONIC_WRITE(SONIC_CRCT,0xffff);
255 SONIC_WRITE(SONIC_FAET,0xffff);
256 SONIC_WRITE(SONIC_MPT,0xffff);
258 /* Fill in the fields of the device structure with ethernet values. */
264 * SONIC uses a normal IRQ
266 #define sonic_request_irq request_irq
267 #define sonic_free_irq free_irq
269 #define sonic_chiptomem(x) KSEG1ADDR(vdma_log2phys(x))