Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Platform device setup for Marvell mv64360/mv64460 host bridges (Discovery)
3 *
4 * Author: Dale Farnsworth <dale@farnsworth.org>
5 *
6 * 2007 (c) MontaVista, Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 */
11
12#include <linux/stddef.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/console.h>
16#include <linux/mv643xx.h>
17#include <linux/platform_device.h>
18
19#include <asm/prom.h>
20
21/*
22 * These functions provide the necessary setup for the mv64x60 drivers.
23 * These drivers are unusual in that they work on both the MIPS and PowerPC
24 * architectures. Because of that, the drivers do not support the normal
25 * PowerPC of_platform_bus_type. They support platform_bus_type instead.
26 */
27
28/*
29 * Create MPSC platform devices
30 */
31static int __init mv64x60_mpsc_register_shared_pdev(struct device_node *np)
32{
33 struct platform_device *pdev;
34 struct resource r[2];
35 struct mpsc_shared_pdata pdata;
36 const phandle *ph;
37 struct device_node *mpscrouting, *mpscintr;
38 int err;
39
40 ph = of_get_property(np, "mpscrouting", NULL);
41 mpscrouting = of_find_node_by_phandle(*ph);
42 if (!mpscrouting)
43 return -ENODEV;
44
45 err = of_address_to_resource(mpscrouting, 0, &r[0]);
46 of_node_put(mpscrouting);
47 if (err)
48 return err;
49
50 ph = of_get_property(np, "mpscintr", NULL);
51 mpscintr = of_find_node_by_phandle(*ph);
52 if (!mpscintr)
53 return -ENODEV;
54
55 err = of_address_to_resource(mpscintr, 0, &r[1]);
56 of_node_put(mpscintr);
57 if (err)
58 return err;
59
60 memset(&pdata, 0, sizeof(pdata));
61
62 pdev = platform_device_alloc(MPSC_SHARED_NAME, 0);
63 if (!pdev)
64 return -ENOMEM;
65
66 err = platform_device_add_resources(pdev, r, 2);
67 if (err)
68 goto error;
69
70 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
71 if (err)
72 goto error;
73
74 err = platform_device_add(pdev);
75 if (err)
76 goto error;
77
78 return 0;
79
80error:
81 platform_device_put(pdev);
82 return err;
83}
84
85
86static int __init mv64x60_mpsc_device_setup(struct device_node *np, int id)
87{
88 struct resource r[5];
89 struct mpsc_pdata pdata;
90 struct platform_device *pdev;
91 const unsigned int *prop;
92 const phandle *ph;
93 struct device_node *sdma, *brg;
94 int err;
95 int port_number;
96
97 /* only register the shared platform device the first time through */
98 if (id == 0 && (err = mv64x60_mpsc_register_shared_pdev(np)))
99 return err;
100
101 memset(r, 0, sizeof(r));
102
103 err = of_address_to_resource(np, 0, &r[0]);
104 if (err)
105 return err;
106
107 of_irq_to_resource(np, 0, &r[4]);
108
109 ph = of_get_property(np, "sdma", NULL);
110 sdma = of_find_node_by_phandle(*ph);
111 if (!sdma)
112 return -ENODEV;
113
114 of_irq_to_resource(sdma, 0, &r[3]);
115 err = of_address_to_resource(sdma, 0, &r[1]);
116 of_node_put(sdma);
117 if (err)
118 return err;
119
120 ph = of_get_property(np, "brg", NULL);
121 brg = of_find_node_by_phandle(*ph);
122 if (!brg)
123 return -ENODEV;
124
125 err = of_address_to_resource(brg, 0, &r[2]);
126 of_node_put(brg);
127 if (err)
128 return err;
129
130 prop = of_get_property(np, "block-index", NULL);
131 if (!prop)
132 return -ENODEV;
133 port_number = *(int *)prop;
134
135 memset(&pdata, 0, sizeof(pdata));
136
137 pdata.cache_mgmt = 1; /* All current revs need this set */
138
139 prop = of_get_property(np, "max_idle", NULL);
140 if (prop)
141 pdata.max_idle = *prop;
142
143 prop = of_get_property(brg, "current-speed", NULL);
144 if (prop)
145 pdata.default_baud = *prop;
146
147 /* Default is 8 bits, no parity, no flow control */
148 pdata.default_bits = 8;
149 pdata.default_parity = 'n';
150 pdata.default_flow = 'n';
151
152 prop = of_get_property(np, "chr_1", NULL);
153 if (prop)
154 pdata.chr_1_val = *prop;
155
156 prop = of_get_property(np, "chr_2", NULL);
157 if (prop)
158 pdata.chr_2_val = *prop;
159
160 prop = of_get_property(np, "chr_10", NULL);
161 if (prop)
162 pdata.chr_10_val = *prop;
163
164 prop = of_get_property(np, "mpcr", NULL);
165 if (prop)
166 pdata.mpcr_val = *prop;
167
168 prop = of_get_property(brg, "bcr", NULL);
169 if (prop)
170 pdata.bcr_val = *prop;
171
172 pdata.brg_can_tune = 1; /* All current revs need this set */
173
174 prop = of_get_property(brg, "clock-src", NULL);
175 if (prop)
176 pdata.brg_clk_src = *prop;
177
178 prop = of_get_property(brg, "clock-frequency", NULL);
179 if (prop)
180 pdata.brg_clk_freq = *prop;
181
182 pdev = platform_device_alloc(MPSC_CTLR_NAME, port_number);
183 if (!pdev)
184 return -ENOMEM;
185
186 err = platform_device_add_resources(pdev, r, 5);
187 if (err)
188 goto error;
189
190 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
191 if (err)
192 goto error;
193
194 err = platform_device_add(pdev);
195 if (err)
196 goto error;
197
198 return 0;
199
200error:
201 platform_device_put(pdev);
202 return err;
203}
204
205/*
206 * Create mv64x60_eth platform devices
207 */
208static int __init eth_register_shared_pdev(struct device_node *np)
209{
210 struct platform_device *pdev;
211 struct resource r[1];
212 int err;
213
214 np = of_get_parent(np);
215 if (!np)
216 return -ENODEV;
217
218 err = of_address_to_resource(np, 0, &r[0]);
219 of_node_put(np);
220 if (err)
221 return err;
222
223 pdev = platform_device_register_simple(MV643XX_ETH_SHARED_NAME, 0,
224 r, 1);
225 if (IS_ERR(pdev))
226 return PTR_ERR(pdev);
227
228 return 0;
229}
230
231static int __init mv64x60_eth_device_setup(struct device_node *np, int id)
232{
233 struct resource r[1];
234 struct mv643xx_eth_platform_data pdata;
235 struct platform_device *pdev;
236 struct device_node *phy;
237 const u8 *mac_addr;
238 const int *prop;
239 const phandle *ph;
240 int err;
241
242 /* only register the shared platform device the first time through */
243 if (id == 0 && (err = eth_register_shared_pdev(np)))
244 return err;
245
246 memset(r, 0, sizeof(r));
247 of_irq_to_resource(np, 0, &r[0]);
248
249 memset(&pdata, 0, sizeof(pdata));
250
251 prop = of_get_property(np, "block-index", NULL);
252 if (!prop)
253 return -ENODEV;
254 pdata.port_number = *prop;
255
256 mac_addr = of_get_mac_address(np);
257 if (mac_addr)
258 memcpy(pdata.mac_addr, mac_addr, 6);
259
260 prop = of_get_property(np, "speed", NULL);
261 if (prop)
262 pdata.speed = *prop;
263
264 prop = of_get_property(np, "tx_queue_size", NULL);
265 if (prop)
266 pdata.tx_queue_size = *prop;
267
268 prop = of_get_property(np, "rx_queue_size", NULL);
269 if (prop)
270 pdata.rx_queue_size = *prop;
271
272 prop = of_get_property(np, "tx_sram_addr", NULL);
273 if (prop)
274 pdata.tx_sram_addr = *prop;
275
276 prop = of_get_property(np, "tx_sram_size", NULL);
277 if (prop)
278 pdata.tx_sram_size = *prop;
279
280 prop = of_get_property(np, "rx_sram_addr", NULL);
281 if (prop)
282 pdata.rx_sram_addr = *prop;
283
284 prop = of_get_property(np, "rx_sram_size", NULL);
285 if (prop)
286 pdata.rx_sram_size = *prop;
287
288 ph = of_get_property(np, "phy", NULL);
289 if (!ph)
290 return -ENODEV;
291
292 phy = of_find_node_by_phandle(*ph);
293 if (phy == NULL)
294 return -ENODEV;
295
296 prop = of_get_property(phy, "reg", NULL);
297 if (prop) {
298 pdata.force_phy_addr = 1;
299 pdata.phy_addr = *prop;
300 }
301
302 of_node_put(phy);
303
304 pdev = platform_device_alloc(MV643XX_ETH_NAME, pdata.port_number);
305 if (!pdev)
306 return -ENOMEM;
307
308 err = platform_device_add_resources(pdev, r, 1);
309 if (err)
310 goto error;
311
312 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
313 if (err)
314 goto error;
315
316 err = platform_device_add(pdev);
317 if (err)
318 goto error;
319
320 return 0;
321
322error:
323 platform_device_put(pdev);
324 return err;
325}
326
327/*
328 * Create mv64x60_i2c platform devices
329 */
330static int __init mv64x60_i2c_device_setup(struct device_node *np, int id)
331{
332 struct resource r[2];
333 struct platform_device *pdev;
334 struct mv64xxx_i2c_pdata pdata;
335 const unsigned int *prop;
336 int err;
337
338 memset(r, 0, sizeof(r));
339
340 err = of_address_to_resource(np, 0, &r[0]);
341 if (err)
342 return err;
343
344 of_irq_to_resource(np, 0, &r[1]);
345
346 memset(&pdata, 0, sizeof(pdata));
347
348 prop = of_get_property(np, "freq_m", NULL);
349 if (!prop)
350 return -ENODEV;
351 pdata.freq_m = *prop;
352
353 prop = of_get_property(np, "freq_n", NULL);
354 if (!prop)
355 return -ENODEV;
356 pdata.freq_n = *prop;
357
358 prop = of_get_property(np, "timeout", NULL);
359 if (prop)
360 pdata.timeout = *prop;
361 else
362 pdata.timeout = 1000; /* 1 second */
363
364 pdev = platform_device_alloc(MV64XXX_I2C_CTLR_NAME, id);
365 if (!pdev)
366 return -ENOMEM;
367
368 err = platform_device_add_resources(pdev, r, 2);
369 if (err)
370 goto error;
371
372 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
373 if (err)
374 goto error;
375
376 err = platform_device_add(pdev);
377 if (err)
378 goto error;
379
380 return 0;
381
382error:
383 platform_device_put(pdev);
384 return err;
385}
386
387/*
388 * Create mv64x60_wdt platform devices
389 */
390static int __init mv64x60_wdt_device_setup(struct device_node *np, int id)
391{
392 struct resource r;
393 struct platform_device *pdev;
394 struct mv64x60_wdt_pdata pdata;
395 const unsigned int *prop;
396 int err;
397
398 err = of_address_to_resource(np, 0, &r);
399 if (err)
400 return err;
401
402 memset(&pdata, 0, sizeof(pdata));
403
404 prop = of_get_property(np, "timeout", NULL);
405 if (!prop)
406 return -ENODEV;
407 pdata.timeout = *prop;
408
409 np = of_get_parent(np);
410 if (!np)
411 return -ENODEV;
412
413 prop = of_get_property(np, "clock-frequency", NULL);
414 of_node_put(np);
415 if (!prop)
416 return -ENODEV;
417 pdata.bus_clk = *prop / 1000000; /* wdt driver wants freq in MHz */
418
419 pdev = platform_device_alloc(MV64x60_WDT_NAME, id);
420 if (!pdev)
421 return -ENOMEM;
422
423 err = platform_device_add_resources(pdev, &r, 1);
424 if (err)
425 goto error;
426
427 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
428 if (err)
429 goto error;
430
431 err = platform_device_add(pdev);
432 if (err)
433 goto error;
434
435 return 0;
436
437error:
438 platform_device_put(pdev);
439 return err;
440}
441
442static int __init mv64x60_device_setup(void)
443{
444 struct device_node *np = NULL;
445 int id;
446 int err;
447
448 id = 0;
449 for_each_compatible_node(np, "serial", "marvell,mpsc")
450 if ((err = mv64x60_mpsc_device_setup(np, id++)))
451 goto error;
452
453 id = 0;
454 for_each_compatible_node(np, "network", "marvell,mv64x60-eth")
455 if ((err = mv64x60_eth_device_setup(np, id++)))
456 goto error;
457
458 id = 0;
459 for_each_compatible_node(np, "i2c", "marvell,mv64x60-i2c")
460 if ((err = mv64x60_i2c_device_setup(np, id++)))
461 goto error;
462
463 /* support up to one watchdog timer */
464 np = of_find_compatible_node(np, NULL, "marvell,mv64x60-wdt");
465 if (np) {
466 if ((err = mv64x60_wdt_device_setup(np, id)))
467 goto error;
468 of_node_put(np);
469 }
470
471 return 0;
472
473error:
474 of_node_put(np);
475 return err;
476}
477arch_initcall(mv64x60_device_setup);
478
479static int __init mv64x60_add_mpsc_console(void)
480{
481 struct device_node *np = NULL;
482 const char *prop;
483
484 prop = of_get_property(of_chosen, "linux,stdout-path", NULL);
485 if (prop == NULL)
486 goto not_mpsc;
487
488 np = of_find_node_by_path(prop);
489 if (!np)
490 goto not_mpsc;
491
492 if (!of_device_is_compatible(np, "marvell,mpsc"))
493 goto not_mpsc;
494
495 prop = of_get_property(np, "block-index", NULL);
496 if (!prop)
497 goto not_mpsc;
498
499 add_preferred_console("ttyMM", *(int *)prop, NULL);
500
501not_mpsc:
502 return 0;
503}
504console_initcall(mv64x60_add_mpsc_console);