tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
47static 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) \
59do { \
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
66static unsigned int sonic_debug = SONIC_DEBUG;
67#else
68static 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 */
76static unsigned short known_revisions[] =
77{
78 0x04, /* Mips Magnum 4000 */
79 0xffff /* end of list */
80};
81
82static 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
91static 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
99static int __init sonic_probe1(struct net_device *dev)
100{
101 static unsigned version_printed;
102 unsigned int silicon_revision;
103 unsigned int val;
104 struct sonic_local *lp = netdev_priv(dev);
105 int err = -ENODEV;
106 int i;
107
108 if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
109 return -EBUSY;
110
111 /*
112 * get the Silicon Revision ID. If this is one of the known
113 * one assume that we found a SONIC ethernet controller at
114 * the expected location.
115 */
116 silicon_revision = SONIC_READ(SONIC_SR);
117 if (sonic_debug > 1)
118 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
119
120 i = 0;
121 while (known_revisions[i] != 0xffff
122 && known_revisions[i] != silicon_revision)
123 i++;
124
125 if (known_revisions[i] == 0xffff) {
126 printk("SONIC ethernet controller not found (0x%4x)\n",
127 silicon_revision);
128 goto out;
129 }
130
131 if (sonic_debug && version_printed++ == 0)
132 printk(version);
133
134 printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", lp->device->bus_id, dev->base_addr);
135
136 /*
137 * Put the sonic into software reset, then
138 * retrieve and print the ethernet address.
139 */
140 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
141 SONIC_WRITE(SONIC_CEP,0);
142 for (i=0; i<3; i++) {
143 val = SONIC_READ(SONIC_CAP0-i);
144 dev->dev_addr[i*2] = val;
145 dev->dev_addr[i*2+1] = val >> 8;
146 }
147
148 err = -ENOMEM;
149
150 /* Initialize the device structure. */
151
152 lp->dma_bitmode = SONIC_BITMODE32;
153
154 /* Allocate the entire chunk of memory for the descriptors.
155 Note that this cannot cross a 64K boundary. */
156 if ((lp->descriptors = dma_alloc_coherent(lp->device,
157 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
158 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
159 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", lp->device->bus_id);
160 goto out;
161 }
162
163 /* Now set up the pointers to point to the appropriate places */
164 lp->cda = lp->descriptors;
165 lp->tda = lp->cda + (SIZEOF_SONIC_CDA
166 * SONIC_BUS_SCALE(lp->dma_bitmode));
167 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
168 * SONIC_BUS_SCALE(lp->dma_bitmode));
169 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
170 * SONIC_BUS_SCALE(lp->dma_bitmode));
171
172 lp->cda_laddr = lp->descriptors_laddr;
173 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
174 * SONIC_BUS_SCALE(lp->dma_bitmode));
175 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
176 * SONIC_BUS_SCALE(lp->dma_bitmode));
177 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
178 * SONIC_BUS_SCALE(lp->dma_bitmode));
179
180 dev->open = jazzsonic_open;
181 dev->stop = jazzsonic_close;
182 dev->hard_start_xmit = sonic_send_packet;
183 dev->get_stats = sonic_get_stats;
184 dev->set_multicast_list = &sonic_multicast_list;
185 dev->tx_timeout = sonic_tx_timeout;
186 dev->watchdog_timeo = TX_TIMEOUT;
187
188 /*
189 * clear tally counter
190 */
191 SONIC_WRITE(SONIC_CRCT,0xffff);
192 SONIC_WRITE(SONIC_FAET,0xffff);
193 SONIC_WRITE(SONIC_MPT,0xffff);
194
195 return 0;
196out:
197 release_region(dev->base_addr, SONIC_MEM_SIZE);
198 return err;
199}
200
201/*
202 * Probe for a SONIC ethernet controller on a Mips Jazz board.
203 * Actually probing is superfluous but we're paranoid.
204 */
205static int __init jazz_sonic_probe(struct platform_device *pdev)
206{
207 struct net_device *dev;
208 struct sonic_local *lp;
209 struct resource *res;
210 int err = 0;
211 DECLARE_MAC_BUF(mac);
212
213 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
214 if (!res)
215 return -ENODEV;
216
217 dev = alloc_etherdev(sizeof(struct sonic_local));
218 if (!dev)
219 return -ENOMEM;
220
221 lp = netdev_priv(dev);
222 lp->device = &pdev->dev;
223 SET_NETDEV_DEV(dev, &pdev->dev);
224
225 netdev_boot_setup_check(dev);
226
227 dev->base_addr = res->start;
228 dev->irq = platform_get_irq(pdev, 0);
229 err = sonic_probe1(dev);
230 if (err)
231 goto out;
232 err = register_netdev(dev);
233 if (err)
234 goto out1;
235
236 printk("%s: MAC %s IRQ %d\n",
237 dev->name, print_mac(mac, dev->dev_addr), dev->irq);
238
239 return 0;
240
241out1:
242 release_region(dev->base_addr, SONIC_MEM_SIZE);
243out:
244 free_netdev(dev);
245
246 return err;
247}
248
249MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
250module_param(sonic_debug, int, 0);
251MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
252MODULE_ALIAS("platform:jazzsonic");
253
254#include "sonic.c"
255
256static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
257{
258 struct net_device *dev = platform_get_drvdata(pdev);
259 struct sonic_local* lp = netdev_priv(dev);
260
261 unregister_netdev(dev);
262 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
263 lp->descriptors, lp->descriptors_laddr);
264 release_region (dev->base_addr, SONIC_MEM_SIZE);
265 free_netdev(dev);
266
267 return 0;
268}
269
270static struct platform_driver jazz_sonic_driver = {
271 .probe = jazz_sonic_probe,
272 .remove = __devexit_p(jazz_sonic_device_remove),
273 .driver = {
274 .name = jazz_sonic_string,
275 .owner = THIS_MODULE,
276 },
277};
278
279static int __init jazz_sonic_init_module(void)
280{
281 return platform_driver_register(&jazz_sonic_driver);
282}
283
284static void __exit jazz_sonic_cleanup_module(void)
285{
286 platform_driver_unregister(&jazz_sonic_driver);
287}
288
289module_init(jazz_sonic_init_module);
290module_exit(jazz_sonic_cleanup_module);