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, IRQF_DISABLED,
89 printk(KERN_ERR "%s: unable to get IRQ %d.\n",
94 retval = sonic_open(dev);
96 free_irq(dev->irq, dev);
100 static int jazzsonic_close(struct net_device* dev)
103 err = sonic_close(dev);
104 free_irq(dev->irq, dev);
108 static const struct net_device_ops sonic_netdev_ops = {
109 .ndo_open = jazzsonic_open,
110 .ndo_stop = jazzsonic_close,
111 .ndo_start_xmit = sonic_send_packet,
112 .ndo_get_stats = sonic_get_stats,
113 .ndo_set_rx_mode = sonic_multicast_list,
114 .ndo_tx_timeout = sonic_tx_timeout,
115 .ndo_change_mtu = eth_change_mtu,
116 .ndo_validate_addr = eth_validate_addr,
117 .ndo_set_mac_address = eth_mac_addr,
120 static int sonic_probe1(struct net_device *dev)
122 static unsigned version_printed;
123 unsigned int silicon_revision;
125 struct sonic_local *lp = netdev_priv(dev);
129 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
133 * get the Silicon Revision ID. If this is one of the known
134 * one assume that we found a SONIC ethernet controller at
135 * the expected location.
137 silicon_revision = SONIC_READ(SONIC_SR);
139 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
142 while (known_revisions[i] != 0xffff &&
143 known_revisions[i] != silicon_revision)
146 if (known_revisions[i] == 0xffff) {
147 printk("SONIC ethernet controller not found (0x%4x)\n",
152 if (sonic_debug && version_printed++ == 0)
155 printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
156 dev_name(lp->device), dev->base_addr);
159 * Put the sonic into software reset, then
160 * retrieve and print the ethernet address.
162 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
163 SONIC_WRITE(SONIC_CEP,0);
164 for (i=0; i<3; i++) {
165 val = SONIC_READ(SONIC_CAP0-i);
166 dev->dev_addr[i*2] = val;
167 dev->dev_addr[i*2+1] = val >> 8;
172 /* Initialize the device structure. */
174 lp->dma_bitmode = SONIC_BITMODE32;
176 /* Allocate the entire chunk of memory for the descriptors.
177 Note that this cannot cross a 64K boundary. */
178 if ((lp->descriptors = dma_alloc_coherent(lp->device,
179 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
180 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
181 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
182 dev_name(lp->device));
186 /* Now set up the pointers to point to the appropriate places */
187 lp->cda = lp->descriptors;
188 lp->tda = lp->cda + (SIZEOF_SONIC_CDA
189 * SONIC_BUS_SCALE(lp->dma_bitmode));
190 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
191 * SONIC_BUS_SCALE(lp->dma_bitmode));
192 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
193 * SONIC_BUS_SCALE(lp->dma_bitmode));
195 lp->cda_laddr = lp->descriptors_laddr;
196 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
197 * SONIC_BUS_SCALE(lp->dma_bitmode));
198 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
199 * SONIC_BUS_SCALE(lp->dma_bitmode));
200 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
201 * SONIC_BUS_SCALE(lp->dma_bitmode));
203 dev->netdev_ops = &sonic_netdev_ops;
204 dev->watchdog_timeo = TX_TIMEOUT;
207 * clear tally counter
209 SONIC_WRITE(SONIC_CRCT,0xffff);
210 SONIC_WRITE(SONIC_FAET,0xffff);
211 SONIC_WRITE(SONIC_MPT,0xffff);
215 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
220 * Probe for a SONIC ethernet controller on a Mips Jazz board.
221 * Actually probing is superfluous but we're paranoid.
223 static int jazz_sonic_probe(struct platform_device *pdev)
225 struct net_device *dev;
226 struct sonic_local *lp;
227 struct resource *res;
230 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
234 dev = alloc_etherdev(sizeof(struct sonic_local));
238 lp = netdev_priv(dev);
239 lp->device = &pdev->dev;
240 SET_NETDEV_DEV(dev, &pdev->dev);
241 platform_set_drvdata(pdev, dev);
243 netdev_boot_setup_check(dev);
245 dev->base_addr = res->start;
246 dev->irq = platform_get_irq(pdev, 0);
247 err = sonic_probe1(dev);
250 err = register_netdev(dev);
254 printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
259 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
266 MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
267 module_param(sonic_debug, int, 0);
268 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
269 MODULE_ALIAS("platform:jazzsonic");
273 static int jazz_sonic_device_remove(struct platform_device *pdev)
275 struct net_device *dev = platform_get_drvdata(pdev);
276 struct sonic_local* lp = netdev_priv(dev);
278 unregister_netdev(dev);
279 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
280 lp->descriptors, lp->descriptors_laddr);
281 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
287 static struct platform_driver jazz_sonic_driver = {
288 .probe = jazz_sonic_probe,
289 .remove = jazz_sonic_device_remove,
291 .name = jazz_sonic_string,
292 .owner = THIS_MODULE,
296 module_platform_driver(jazz_sonic_driver);