6 * Converted to DMA API, and (from the mac68k project) introduced
7 * dhd's support for 16-bit cards.
9 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
11 * This driver is based on work from Andreas Busse, but most of
12 * the code is rewritten.
14 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
16 * A driver for the onboard Sonic ethernet controller on Mips Jazz
17 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
18 * perhaps others, too)
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/fcntl.h>
25 #include <linux/gfp.h>
26 #include <linux/interrupt.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
30 #include <linux/string.h>
31 #include <linux/delay.h>
32 #include <linux/errno.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/skbuff.h>
36 #include <linux/platform_device.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/slab.h>
40 #include <asm/bootinfo.h>
41 #include <asm/pgtable.h>
45 #include <asm/jazzdma.h>
47 static char jazz_sonic_string[] = "jazzsonic";
49 #define SONIC_MEM_SIZE 0x100
54 * Macros to access SONIC registers
56 #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
58 #define SONIC_WRITE(reg,val) \
60 *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \
64 /* use 0 for production, 1 for verification, >1 for debug */
66 static unsigned int sonic_debug = SONIC_DEBUG;
68 static unsigned int sonic_debug = 1;
72 * We cannot use station (ethernet) address prefixes to detect the
73 * sonic controller since these are board manufacturer depended.
74 * So we check for known Silicon Revision IDs instead.
76 static unsigned short known_revisions[] =
78 0x04, /* Mips Magnum 4000 */
79 0xffff /* end of list */
82 static int jazzsonic_open(struct net_device* dev)
86 retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);
88 printk(KERN_ERR "%s: unable to get IRQ %d.\n",
93 retval = sonic_open(dev);
95 free_irq(dev->irq, dev);
99 static int jazzsonic_close(struct net_device* dev)
102 err = sonic_close(dev);
103 free_irq(dev->irq, dev);
107 static const struct net_device_ops sonic_netdev_ops = {
108 .ndo_open = jazzsonic_open,
109 .ndo_stop = jazzsonic_close,
110 .ndo_start_xmit = sonic_send_packet,
111 .ndo_get_stats = sonic_get_stats,
112 .ndo_set_rx_mode = sonic_multicast_list,
113 .ndo_tx_timeout = sonic_tx_timeout,
114 .ndo_change_mtu = eth_change_mtu,
115 .ndo_validate_addr = eth_validate_addr,
116 .ndo_set_mac_address = eth_mac_addr,
119 static int sonic_probe1(struct net_device *dev)
121 static unsigned version_printed;
122 unsigned int silicon_revision;
124 struct sonic_local *lp = netdev_priv(dev);
128 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
132 * get the Silicon Revision ID. If this is one of the known
133 * one assume that we found a SONIC ethernet controller at
134 * the expected location.
136 silicon_revision = SONIC_READ(SONIC_SR);
138 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
141 while (known_revisions[i] != 0xffff &&
142 known_revisions[i] != silicon_revision)
145 if (known_revisions[i] == 0xffff) {
146 printk("SONIC ethernet controller not found (0x%4x)\n",
151 if (sonic_debug && version_printed++ == 0)
154 printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
155 dev_name(lp->device), dev->base_addr);
158 * Put the sonic into software reset, then
159 * retrieve and print the ethernet address.
161 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
162 SONIC_WRITE(SONIC_CEP,0);
163 for (i=0; i<3; i++) {
164 val = SONIC_READ(SONIC_CAP0-i);
165 dev->dev_addr[i*2] = val;
166 dev->dev_addr[i*2+1] = val >> 8;
171 /* Initialize the device structure. */
173 lp->dma_bitmode = SONIC_BITMODE32;
175 /* Allocate the entire chunk of memory for the descriptors.
176 Note that this cannot cross a 64K boundary. */
177 lp->descriptors = dma_alloc_coherent(lp->device,
179 SONIC_BUS_SCALE(lp->dma_bitmode),
180 &lp->descriptors_laddr,
182 if (lp->descriptors == NULL)
185 /* Now set up the pointers to point to the appropriate places */
186 lp->cda = lp->descriptors;
187 lp->tda = lp->cda + (SIZEOF_SONIC_CDA
188 * SONIC_BUS_SCALE(lp->dma_bitmode));
189 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
190 * SONIC_BUS_SCALE(lp->dma_bitmode));
191 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
192 * SONIC_BUS_SCALE(lp->dma_bitmode));
194 lp->cda_laddr = lp->descriptors_laddr;
195 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
196 * SONIC_BUS_SCALE(lp->dma_bitmode));
197 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
198 * SONIC_BUS_SCALE(lp->dma_bitmode));
199 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
200 * SONIC_BUS_SCALE(lp->dma_bitmode));
202 dev->netdev_ops = &sonic_netdev_ops;
203 dev->watchdog_timeo = TX_TIMEOUT;
206 * clear tally counter
208 SONIC_WRITE(SONIC_CRCT,0xffff);
209 SONIC_WRITE(SONIC_FAET,0xffff);
210 SONIC_WRITE(SONIC_MPT,0xffff);
214 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
219 * Probe for a SONIC ethernet controller on a Mips Jazz board.
220 * Actually probing is superfluous but we're paranoid.
222 static int jazz_sonic_probe(struct platform_device *pdev)
224 struct net_device *dev;
225 struct sonic_local *lp;
226 struct resource *res;
229 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
233 dev = alloc_etherdev(sizeof(struct sonic_local));
237 lp = netdev_priv(dev);
238 lp->device = &pdev->dev;
239 SET_NETDEV_DEV(dev, &pdev->dev);
240 platform_set_drvdata(pdev, dev);
242 netdev_boot_setup_check(dev);
244 dev->base_addr = res->start;
245 dev->irq = platform_get_irq(pdev, 0);
246 err = sonic_probe1(dev);
249 err = register_netdev(dev);
253 printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
258 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
265 MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
266 module_param(sonic_debug, int, 0);
267 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
268 MODULE_ALIAS("platform:jazzsonic");
272 static int jazz_sonic_device_remove(struct platform_device *pdev)
274 struct net_device *dev = platform_get_drvdata(pdev);
275 struct sonic_local* lp = netdev_priv(dev);
277 unregister_netdev(dev);
278 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
279 lp->descriptors, lp->descriptors_laddr);
280 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
286 static struct platform_driver jazz_sonic_driver = {
287 .probe = jazz_sonic_probe,
288 .remove = jazz_sonic_device_remove,
290 .name = jazz_sonic_string,
291 .owner = THIS_MODULE,
295 module_platform_driver(jazz_sonic_driver);