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1/*
2 * jazzsonic.c
3 *
4 * (C) 2005 Finn Thain
5 *
6 * Converted to DMA API, and (from the mac68k project) introduced
7 * dhd's support for 16-bit cards.
8 *
9 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
10 *
11 * This driver is based on work from Andreas Busse, but most of
12 * the code is rewritten.
13 *
14 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
15 *
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)
19 */
20
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>
29#include <linux/in.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>
39
40#include <asm/bootinfo.h>
41#include <asm/system.h>
42#include <asm/pgtable.h>
43#include <asm/io.h>
44#include <asm/dma.h>
45#include <asm/jazz.h>
46#include <asm/jazzdma.h>
47
48static char jazz_sonic_string[] = "jazzsonic";
49
50#define SONIC_MEM_SIZE 0x100
51
52#include "sonic.h"
53
54/*
55 * Macros to access SONIC registers
56 */
57#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
58
59#define SONIC_WRITE(reg,val) \
60do { \
61 *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \
62} while (0)
63
64
65/* use 0 for production, 1 for verification, >1 for debug */
66#ifdef SONIC_DEBUG
67static unsigned int sonic_debug = SONIC_DEBUG;
68#else
69static unsigned int sonic_debug = 1;
70#endif
71
72/*
73 * We cannot use station (ethernet) address prefixes to detect the
74 * sonic controller since these are board manufacturer depended.
75 * So we check for known Silicon Revision IDs instead.
76 */
77static unsigned short known_revisions[] =
78{
79 0x04, /* Mips Magnum 4000 */
80 0xffff /* end of list */
81};
82
83static int jazzsonic_open(struct net_device* dev)
84{
85 int retval;
86
87 retval = request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED,
88 "sonic", dev);
89 if (retval) {
90 printk(KERN_ERR "%s: unable to get IRQ %d.\n",
91 dev->name, dev->irq);
92 return retval;
93 }
94
95 retval = sonic_open(dev);
96 if (retval)
97 free_irq(dev->irq, dev);
98 return retval;
99}
100
101static int jazzsonic_close(struct net_device* dev)
102{
103 int err;
104 err = sonic_close(dev);
105 free_irq(dev->irq, dev);
106 return err;
107}
108
109static const struct net_device_ops sonic_netdev_ops = {
110 .ndo_open = jazzsonic_open,
111 .ndo_stop = jazzsonic_close,
112 .ndo_start_xmit = sonic_send_packet,
113 .ndo_get_stats = sonic_get_stats,
114 .ndo_set_multicast_list = sonic_multicast_list,
115 .ndo_tx_timeout = sonic_tx_timeout,
116 .ndo_change_mtu = eth_change_mtu,
117 .ndo_validate_addr = eth_validate_addr,
118 .ndo_set_mac_address = eth_mac_addr,
119};
120
121static int __devinit sonic_probe1(struct net_device *dev)
122{
123 static unsigned version_printed;
124 unsigned int silicon_revision;
125 unsigned int val;
126 struct sonic_local *lp = netdev_priv(dev);
127 int err = -ENODEV;
128 int i;
129
130 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
131 return -EBUSY;
132
133 /*
134 * get the Silicon Revision ID. If this is one of the known
135 * one assume that we found a SONIC ethernet controller at
136 * the expected location.
137 */
138 silicon_revision = SONIC_READ(SONIC_SR);
139 if (sonic_debug > 1)
140 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
141
142 i = 0;
143 while (known_revisions[i] != 0xffff &&
144 known_revisions[i] != silicon_revision)
145 i++;
146
147 if (known_revisions[i] == 0xffff) {
148 printk("SONIC ethernet controller not found (0x%4x)\n",
149 silicon_revision);
150 goto out;
151 }
152
153 if (sonic_debug && version_printed++ == 0)
154 printk(version);
155
156 printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
157 dev_name(lp->device), dev->base_addr);
158
159 /*
160 * Put the sonic into software reset, then
161 * retrieve and print the ethernet address.
162 */
163 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
164 SONIC_WRITE(SONIC_CEP,0);
165 for (i=0; i<3; i++) {
166 val = SONIC_READ(SONIC_CAP0-i);
167 dev->dev_addr[i*2] = val;
168 dev->dev_addr[i*2+1] = val >> 8;
169 }
170
171 err = -ENOMEM;
172
173 /* Initialize the device structure. */
174
175 lp->dma_bitmode = SONIC_BITMODE32;
176
177 /* Allocate the entire chunk of memory for the descriptors.
178 Note that this cannot cross a 64K boundary. */
179 if ((lp->descriptors = dma_alloc_coherent(lp->device,
180 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
181 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
182 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
183 dev_name(lp->device));
184 goto out;
185 }
186
187 /* Now set up the pointers to point to the appropriate places */
188 lp->cda = lp->descriptors;
189 lp->tda = lp->cda + (SIZEOF_SONIC_CDA
190 * SONIC_BUS_SCALE(lp->dma_bitmode));
191 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
192 * SONIC_BUS_SCALE(lp->dma_bitmode));
193 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
194 * SONIC_BUS_SCALE(lp->dma_bitmode));
195
196 lp->cda_laddr = lp->descriptors_laddr;
197 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
198 * SONIC_BUS_SCALE(lp->dma_bitmode));
199 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
200 * SONIC_BUS_SCALE(lp->dma_bitmode));
201 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
202 * SONIC_BUS_SCALE(lp->dma_bitmode));
203
204 dev->netdev_ops = &sonic_netdev_ops;
205 dev->watchdog_timeo = TX_TIMEOUT;
206
207 /*
208 * clear tally counter
209 */
210 SONIC_WRITE(SONIC_CRCT,0xffff);
211 SONIC_WRITE(SONIC_FAET,0xffff);
212 SONIC_WRITE(SONIC_MPT,0xffff);
213
214 return 0;
215out:
216 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
217 return err;
218}
219
220/*
221 * Probe for a SONIC ethernet controller on a Mips Jazz board.
222 * Actually probing is superfluous but we're paranoid.
223 */
224static int __devinit jazz_sonic_probe(struct platform_device *pdev)
225{
226 struct net_device *dev;
227 struct sonic_local *lp;
228 struct resource *res;
229 int err = 0;
230
231 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
232 if (!res)
233 return -ENODEV;
234
235 dev = alloc_etherdev(sizeof(struct sonic_local));
236 if (!dev)
237 return -ENOMEM;
238
239 lp = netdev_priv(dev);
240 lp->device = &pdev->dev;
241 SET_NETDEV_DEV(dev, &pdev->dev);
242 platform_set_drvdata(pdev, dev);
243
244 netdev_boot_setup_check(dev);
245
246 dev->base_addr = res->start;
247 dev->irq = platform_get_irq(pdev, 0);
248 err = sonic_probe1(dev);
249 if (err)
250 goto out;
251 err = register_netdev(dev);
252 if (err)
253 goto out1;
254
255 printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
256
257 return 0;
258
259out1:
260 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
261out:
262 free_netdev(dev);
263
264 return err;
265}
266
267MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
268module_param(sonic_debug, int, 0);
269MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
270MODULE_ALIAS("platform:jazzsonic");
271
272#include "sonic.c"
273
274static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
275{
276 struct net_device *dev = platform_get_drvdata(pdev);
277 struct sonic_local* lp = netdev_priv(dev);
278
279 unregister_netdev(dev);
280 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
281 lp->descriptors, lp->descriptors_laddr);
282 release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
283 free_netdev(dev);
284
285 return 0;
286}
287
288static struct platform_driver jazz_sonic_driver = {
289 .probe = jazz_sonic_probe,
290 .remove = __devexit_p(jazz_sonic_device_remove),
291 .driver = {
292 .name = jazz_sonic_string,
293 .owner = THIS_MODULE,
294 },
295};
296
297static int __init jazz_sonic_init_module(void)
298{
299 return platform_driver_register(&jazz_sonic_driver);
300}
301
302static void __exit jazz_sonic_cleanup_module(void)
303{
304 platform_driver_unregister(&jazz_sonic_driver);
305}
306
307module_init(jazz_sonic_init_module);
308module_exit(jazz_sonic_cleanup_module);