Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / net / jazzsonic.c
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/interrupt.h>
26 #include <linux/init.h>
27 #include <linux/ioport.h>
28 #include <linux/in.h>
29 #include <linux/slab.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
39 #include <asm/bootinfo.h>
40 #include <asm/system.h>
41 #include <asm/pgtable.h>
42 #include <asm/io.h>
43 #include <asm/dma.h>
44 #include <asm/jazz.h>
45 #include <asm/jazzdma.h>
46
47 static char jazz_sonic_string[] = "jazzsonic";
48
49 #define SONIC_MEM_SIZE  0x100
50
51 #include "sonic.h"
52
53 /*
54  * Macros to access SONIC registers
55  */
56 #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
57
58 #define SONIC_WRITE(reg,val)                                            \
59 do {                                                                    \
60         *((volatile unsigned int *)dev->base_addr+(reg)) = (val);               \
61 } while (0)
62
63
64 /* use 0 for production, 1 for verification, >1 for debug */
65 #ifdef SONIC_DEBUG
66 static unsigned int sonic_debug = SONIC_DEBUG;
67 #else
68 static unsigned int sonic_debug = 1;
69 #endif
70
71 /*
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.
75  */
76 static unsigned short known_revisions[] =
77 {
78         0x04,                   /* Mips Magnum 4000 */
79         0xffff                  /* end of list */
80 };
81
82 static int jazzsonic_open(struct net_device* dev)
83 {
84         if (request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED, "sonic", dev)) {
85                 printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq);
86                 return -EAGAIN;
87         }
88         return sonic_open(dev);
89 }
90
91 static int jazzsonic_close(struct net_device* dev)
92 {
93         int err;
94         err = sonic_close(dev);
95         free_irq(dev->irq, dev);
96         return err;
97 }
98
99 static const struct net_device_ops sonic_netdev_ops = {
100         .ndo_open               = jazzsonic_open,
101         .ndo_stop               = jazzsonic_close,
102         .ndo_start_xmit         = sonic_send_packet,
103         .ndo_get_stats          = sonic_get_stats,
104         .ndo_set_multicast_list = sonic_multicast_list,
105         .ndo_tx_timeout         = sonic_tx_timeout,
106         .ndo_change_mtu         = eth_change_mtu,
107         .ndo_validate_addr      = eth_validate_addr,
108         .ndo_set_mac_address    = eth_mac_addr,
109 };
110
111 static int __devinit sonic_probe1(struct net_device *dev)
112 {
113         static unsigned version_printed;
114         unsigned int silicon_revision;
115         unsigned int val;
116         struct sonic_local *lp = netdev_priv(dev);
117         int err = -ENODEV;
118         int i;
119
120         if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
121                 return -EBUSY;
122
123         /*
124          * get the Silicon Revision ID. If this is one of the known
125          * one assume that we found a SONIC ethernet controller at
126          * the expected location.
127          */
128         silicon_revision = SONIC_READ(SONIC_SR);
129         if (sonic_debug > 1)
130                 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
131
132         i = 0;
133         while (known_revisions[i] != 0xffff &&
134                known_revisions[i] != silicon_revision)
135                 i++;
136
137         if (known_revisions[i] == 0xffff) {
138                 printk("SONIC ethernet controller not found (0x%4x)\n",
139                        silicon_revision);
140                 goto out;
141         }
142
143         if (sonic_debug  &&  version_printed++ == 0)
144                 printk(version);
145
146         printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
147                dev_name(lp->device), dev->base_addr);
148
149         /*
150          * Put the sonic into software reset, then
151          * retrieve and print the ethernet address.
152          */
153         SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
154         SONIC_WRITE(SONIC_CEP,0);
155         for (i=0; i<3; i++) {
156                 val = SONIC_READ(SONIC_CAP0-i);
157                 dev->dev_addr[i*2] = val;
158                 dev->dev_addr[i*2+1] = val >> 8;
159         }
160
161         err = -ENOMEM;
162
163         /* Initialize the device structure. */
164
165         lp->dma_bitmode = SONIC_BITMODE32;
166
167         /* Allocate the entire chunk of memory for the descriptors.
168            Note that this cannot cross a 64K boundary. */
169         if ((lp->descriptors = dma_alloc_coherent(lp->device,
170                                 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
171                                 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
172                 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
173                        dev_name(lp->device));
174                 goto out;
175         }
176
177         /* Now set up the pointers to point to the appropriate places */
178         lp->cda = lp->descriptors;
179         lp->tda = lp->cda + (SIZEOF_SONIC_CDA
180                              * SONIC_BUS_SCALE(lp->dma_bitmode));
181         lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
182                              * SONIC_BUS_SCALE(lp->dma_bitmode));
183         lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
184                              * SONIC_BUS_SCALE(lp->dma_bitmode));
185
186         lp->cda_laddr = lp->descriptors_laddr;
187         lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
188                              * SONIC_BUS_SCALE(lp->dma_bitmode));
189         lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
190                              * SONIC_BUS_SCALE(lp->dma_bitmode));
191         lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
192                              * SONIC_BUS_SCALE(lp->dma_bitmode));
193
194         dev->netdev_ops = &sonic_netdev_ops;
195         dev->watchdog_timeo = TX_TIMEOUT;
196
197         /*
198          * clear tally counter
199          */
200         SONIC_WRITE(SONIC_CRCT,0xffff);
201         SONIC_WRITE(SONIC_FAET,0xffff);
202         SONIC_WRITE(SONIC_MPT,0xffff);
203
204         return 0;
205 out:
206         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
207         return err;
208 }
209
210 /*
211  * Probe for a SONIC ethernet controller on a Mips Jazz board.
212  * Actually probing is superfluous but we're paranoid.
213  */
214 static int __devinit jazz_sonic_probe(struct platform_device *pdev)
215 {
216         struct net_device *dev;
217         struct sonic_local *lp;
218         struct resource *res;
219         int err = 0;
220
221         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
222         if (!res)
223                 return -ENODEV;
224
225         dev = alloc_etherdev(sizeof(struct sonic_local));
226         if (!dev)
227                 return -ENOMEM;
228
229         lp = netdev_priv(dev);
230         lp->device = &pdev->dev;
231         SET_NETDEV_DEV(dev, &pdev->dev);
232         platform_set_drvdata(pdev, dev);
233
234         netdev_boot_setup_check(dev);
235
236         dev->base_addr = res->start;
237         dev->irq = platform_get_irq(pdev, 0);
238         err = sonic_probe1(dev);
239         if (err)
240                 goto out;
241         err = register_netdev(dev);
242         if (err)
243                 goto out1;
244
245         printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
246
247         return 0;
248
249 out1:
250         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
251 out:
252         free_netdev(dev);
253
254         return err;
255 }
256
257 MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
258 module_param(sonic_debug, int, 0);
259 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
260 MODULE_ALIAS("platform:jazzsonic");
261
262 #include "sonic.c"
263
264 static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
265 {
266         struct net_device *dev = platform_get_drvdata(pdev);
267         struct sonic_local* lp = netdev_priv(dev);
268
269         unregister_netdev(dev);
270         dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
271                           lp->descriptors, lp->descriptors_laddr);
272         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
273         free_netdev(dev);
274
275         return 0;
276 }
277
278 static struct platform_driver jazz_sonic_driver = {
279         .probe  = jazz_sonic_probe,
280         .remove = __devexit_p(jazz_sonic_device_remove),
281         .driver = {
282                 .name   = jazz_sonic_string,
283                 .owner  = THIS_MODULE,
284         },
285 };
286
287 static int __init jazz_sonic_init_module(void)
288 {
289         return platform_driver_register(&jazz_sonic_driver);
290 }
291
292 static void __exit jazz_sonic_cleanup_module(void)
293 {
294         platform_driver_unregister(&jazz_sonic_driver);
295 }
296
297 module_init(jazz_sonic_init_module);
298 module_exit(jazz_sonic_cleanup_module);