Commit | Line | Data |
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74f2a5f0 CZ |
1 | /* |
2 | * xtsonic.c | |
3 | * | |
4 | * (C) 2001 - 2007 Tensilica Inc. | |
5 | * Kevin Chea <kchea@yahoo.com> | |
6 | * Marc Gauthier <marc@linux-xtensa.org> | |
7 | * Chris Zankel <chris@zankel.net> | |
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 the XT2000. | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/fcntl.h> | |
5a0e3ad6 | 23 | #include <linux/gfp.h> |
74f2a5f0 CZ |
24 | #include <linux/interrupt.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/in.h> | |
74f2a5f0 CZ |
28 | #include <linux/string.h> |
29 | #include <linux/delay.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/etherdevice.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/platform_device.h> | |
35 | #include <linux/dma-mapping.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
74f2a5f0 CZ |
37 | |
38 | #include <asm/io.h> | |
39 | #include <asm/pgtable.h> | |
40 | #include <asm/dma.h> | |
41 | ||
42 | static char xtsonic_string[] = "xtsonic"; | |
43 | ||
44 | extern unsigned xtboard_nvram_valid(void); | |
45 | extern void xtboard_get_ether_addr(unsigned char *buf); | |
46 | ||
47 | #include "sonic.h" | |
48 | ||
49 | /* | |
50 | * According to the documentation for the Sonic ethernet controller, | |
51 | * EOBC should be 760 words (1520 bytes) for 32-bit applications, and, | |
52 | * as such, 2 words less than the buffer size. The value for RBSIZE | |
53 | * defined in sonic.h, however is only 1520. | |
54 | * | |
55 | * (Note that in 16-bit configurations, EOBC is 759 words (1518 bytes) and | |
56 | * RBSIZE 1520 bytes) | |
57 | */ | |
58 | #undef SONIC_RBSIZE | |
59 | #define SONIC_RBSIZE 1524 | |
60 | ||
61 | /* | |
62 | * The chip provides 256 byte register space. | |
63 | */ | |
64 | #define SONIC_MEM_SIZE 0x100 | |
65 | ||
66 | /* | |
67 | * Macros to access SONIC registers | |
68 | */ | |
69 | #define SONIC_READ(reg) \ | |
70 | (0xffff & *((volatile unsigned int *)dev->base_addr+reg)) | |
71 | ||
72 | #define SONIC_WRITE(reg,val) \ | |
73 | *((volatile unsigned int *)dev->base_addr+reg) = val | |
74 | ||
75 | ||
76 | /* Use 0 for production, 1 for verification, and >2 for debug */ | |
77 | #ifdef SONIC_DEBUG | |
78 | static unsigned int sonic_debug = SONIC_DEBUG; | |
79 | #else | |
80 | static unsigned int sonic_debug = 1; | |
81 | #endif | |
82 | ||
83 | /* | |
84 | * We cannot use station (ethernet) address prefixes to detect the | |
85 | * sonic controller since these are board manufacturer depended. | |
86 | * So we check for known Silicon Revision IDs instead. | |
87 | */ | |
88 | static unsigned short known_revisions[] = | |
89 | { | |
90 | 0x101, /* SONIC 83934 */ | |
91 | 0xffff /* end of list */ | |
92 | }; | |
93 | ||
94 | static int xtsonic_open(struct net_device *dev) | |
95 | { | |
a0607fd3 | 96 | if (request_irq(dev->irq,sonic_interrupt,IRQF_DISABLED,"sonic",dev)) { |
74f2a5f0 CZ |
97 | printk(KERN_ERR "%s: unable to get IRQ %d.\n", |
98 | dev->name, dev->irq); | |
99 | return -EAGAIN; | |
100 | } | |
101 | return sonic_open(dev); | |
102 | } | |
103 | ||
104 | static int xtsonic_close(struct net_device *dev) | |
105 | { | |
106 | int err; | |
107 | err = sonic_close(dev); | |
108 | free_irq(dev->irq, dev); | |
109 | return err; | |
110 | } | |
111 | ||
ccd97bb0 AB |
112 | static const struct net_device_ops xtsonic_netdev_ops = { |
113 | .ndo_open = xtsonic_open, | |
114 | .ndo_stop = xtsonic_close, | |
115 | .ndo_start_xmit = sonic_send_packet, | |
116 | .ndo_get_stats = sonic_get_stats, | |
117 | .ndo_set_multicast_list = sonic_multicast_list, | |
118 | .ndo_tx_timeout = sonic_tx_timeout, | |
119 | .ndo_validate_addr = eth_validate_addr, | |
120 | .ndo_change_mtu = eth_change_mtu, | |
121 | .ndo_set_mac_address = eth_mac_addr, | |
122 | }; | |
123 | ||
74f2a5f0 CZ |
124 | static int __init sonic_probe1(struct net_device *dev) |
125 | { | |
126 | static unsigned version_printed = 0; | |
127 | unsigned int silicon_revision; | |
128 | struct sonic_local *lp = netdev_priv(dev); | |
129 | unsigned int base_addr = dev->base_addr; | |
130 | int i; | |
131 | int err = 0; | |
132 | ||
133 | if (!request_mem_region(base_addr, 0x100, xtsonic_string)) | |
134 | return -EBUSY; | |
135 | ||
136 | /* | |
137 | * get the Silicon Revision ID. If this is one of the known | |
138 | * one assume that we found a SONIC ethernet controller at | |
139 | * the expected location. | |
140 | */ | |
141 | silicon_revision = SONIC_READ(SONIC_SR); | |
142 | if (sonic_debug > 1) | |
143 | printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision); | |
144 | ||
145 | i = 0; | |
146 | while ((known_revisions[i] != 0xffff) && | |
147 | (known_revisions[i] != silicon_revision)) | |
148 | i++; | |
149 | ||
150 | if (known_revisions[i] == 0xffff) { | |
151 | printk("SONIC ethernet controller not found (0x%4x)\n", | |
152 | silicon_revision); | |
153 | return -ENODEV; | |
154 | } | |
155 | ||
156 | if (sonic_debug && version_printed++ == 0) | |
157 | printk(version); | |
158 | ||
159 | /* | |
160 | * Put the sonic into software reset, then retrieve ethernet address. | |
161 | * Note: we are assuming that the boot-loader has initialized the cam. | |
162 | */ | |
163 | SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); | |
164 | SONIC_WRITE(SONIC_DCR, | |
165 | SONIC_DCR_WC0|SONIC_DCR_DW|SONIC_DCR_LBR|SONIC_DCR_SBUS); | |
166 | SONIC_WRITE(SONIC_CEP,0); | |
167 | SONIC_WRITE(SONIC_IMR,0); | |
168 | ||
169 | SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); | |
170 | SONIC_WRITE(SONIC_CEP,0); | |
171 | ||
172 | for (i=0; i<3; i++) { | |
173 | unsigned int val = SONIC_READ(SONIC_CAP0-i); | |
174 | dev->dev_addr[i*2] = val; | |
175 | dev->dev_addr[i*2+1] = val >> 8; | |
176 | } | |
177 | ||
178 | /* Initialize the device structure. */ | |
179 | ||
180 | lp->dma_bitmode = SONIC_BITMODE32; | |
181 | ||
182 | /* | |
183 | * Allocate local private descriptor areas in uncached space. | |
184 | * The entire structure must be located within the same 64kb segment. | |
185 | * A simple way to ensure this is to allocate twice the | |
186 | * size of the structure -- given that the structure is | |
187 | * much less than 64 kB, at least one of the halves of | |
188 | * the allocated area will be contained entirely in 64 kB. | |
189 | * We also allocate extra space for a pointer to allow freeing | |
190 | * this structure later on (in xtsonic_cleanup_module()). | |
191 | */ | |
192 | lp->descriptors = | |
193 | dma_alloc_coherent(lp->device, | |
194 | SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), | |
195 | &lp->descriptors_laddr, GFP_KERNEL); | |
196 | ||
197 | if (lp->descriptors == NULL) { | |
198 | printk(KERN_ERR "%s: couldn't alloc DMA memory for " | |
c2313557 | 199 | " descriptors.\n", dev_name(lp->device)); |
74f2a5f0 CZ |
200 | goto out; |
201 | } | |
202 | ||
203 | lp->cda = lp->descriptors; | |
204 | lp->tda = lp->cda + (SIZEOF_SONIC_CDA | |
205 | * SONIC_BUS_SCALE(lp->dma_bitmode)); | |
206 | lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS | |
207 | * SONIC_BUS_SCALE(lp->dma_bitmode)); | |
208 | lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS | |
209 | * SONIC_BUS_SCALE(lp->dma_bitmode)); | |
210 | ||
211 | /* get the virtual dma address */ | |
212 | ||
213 | lp->cda_laddr = lp->descriptors_laddr; | |
214 | lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA | |
215 | * SONIC_BUS_SCALE(lp->dma_bitmode)); | |
216 | lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS | |
217 | * SONIC_BUS_SCALE(lp->dma_bitmode)); | |
218 | lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS | |
219 | * SONIC_BUS_SCALE(lp->dma_bitmode)); | |
220 | ||
ccd97bb0 | 221 | dev->netdev_ops = &xtsonic_netdev_ops; |
74f2a5f0 CZ |
222 | dev->watchdog_timeo = TX_TIMEOUT; |
223 | ||
224 | /* | |
225 | * clear tally counter | |
226 | */ | |
227 | SONIC_WRITE(SONIC_CRCT,0xffff); | |
228 | SONIC_WRITE(SONIC_FAET,0xffff); | |
229 | SONIC_WRITE(SONIC_MPT,0xffff); | |
230 | ||
231 | return 0; | |
232 | out: | |
233 | release_region(dev->base_addr, SONIC_MEM_SIZE); | |
234 | return err; | |
235 | } | |
236 | ||
237 | ||
238 | /* | |
239 | * Probe for a SONIC ethernet controller on an XT2000 board. | |
240 | * Actually probing is superfluous but we're paranoid. | |
241 | */ | |
242 | ||
0c9cd395 | 243 | int __devinit xtsonic_probe(struct platform_device *pdev) |
74f2a5f0 CZ |
244 | { |
245 | struct net_device *dev; | |
246 | struct sonic_local *lp; | |
247 | struct resource *resmem, *resirq; | |
248 | int err = 0; | |
249 | ||
74f2a5f0 CZ |
250 | if ((resmem = platform_get_resource(pdev, IORESOURCE_MEM, 0)) == NULL) |
251 | return -ENODEV; | |
252 | ||
253 | if ((resirq = platform_get_resource(pdev, IORESOURCE_IRQ, 0)) == NULL) | |
254 | return -ENODEV; | |
255 | ||
256 | if ((dev = alloc_etherdev(sizeof(struct sonic_local))) == NULL) | |
257 | return -ENOMEM; | |
258 | ||
259 | lp = netdev_priv(dev); | |
260 | lp->device = &pdev->dev; | |
261 | SET_NETDEV_DEV(dev, &pdev->dev); | |
262 | netdev_boot_setup_check(dev); | |
263 | ||
264 | dev->base_addr = resmem->start; | |
265 | dev->irq = resirq->start; | |
266 | ||
267 | if ((err = sonic_probe1(dev))) | |
268 | goto out; | |
269 | if ((err = register_netdev(dev))) | |
270 | goto out1; | |
271 | ||
e174961c JB |
272 | printk("%s: SONIC ethernet @%08lx, MAC %pM, IRQ %d\n", dev->name, |
273 | dev->base_addr, dev->dev_addr, dev->irq); | |
74f2a5f0 CZ |
274 | |
275 | return 0; | |
276 | ||
277 | out1: | |
278 | release_region(dev->base_addr, SONIC_MEM_SIZE); | |
279 | out: | |
280 | free_netdev(dev); | |
281 | ||
282 | return err; | |
283 | } | |
284 | ||
285 | MODULE_DESCRIPTION("Xtensa XT2000 SONIC ethernet driver"); | |
286 | module_param(sonic_debug, int, 0); | |
287 | MODULE_PARM_DESC(sonic_debug, "xtsonic debug level (1-4)"); | |
288 | ||
289 | #include "sonic.c" | |
290 | ||
291 | static int __devexit xtsonic_device_remove (struct platform_device *pdev) | |
292 | { | |
293 | struct net_device *dev = platform_get_drvdata(pdev); | |
294 | struct sonic_local *lp = netdev_priv(dev); | |
295 | ||
296 | unregister_netdev(dev); | |
297 | dma_free_coherent(lp->device, | |
298 | SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), | |
299 | lp->descriptors, lp->descriptors_laddr); | |
300 | release_region (dev->base_addr, SONIC_MEM_SIZE); | |
301 | free_netdev(dev); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static struct platform_driver xtsonic_driver = { | |
307 | .probe = xtsonic_probe, | |
308 | .remove = __devexit_p(xtsonic_device_remove), | |
309 | .driver = { | |
310 | .name = xtsonic_string, | |
311 | }, | |
312 | }; | |
313 | ||
314 | static int __init xtsonic_init(void) | |
315 | { | |
316 | return platform_driver_register(&xtsonic_driver); | |
317 | } | |
318 | ||
319 | static void __exit xtsonic_cleanup(void) | |
320 | { | |
321 | platform_driver_unregister(&xtsonic_driver); | |
322 | } | |
323 | ||
324 | module_init(xtsonic_init); | |
325 | module_exit(xtsonic_cleanup); |