Linux kernel mirror (for testing)
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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#include <linux/of_platform.h>
19#include <linux/dma-mapping.h>
20
21#include <asm/prom.h>
22
23/*
24 * These functions provide the necessary setup for the mv64x60 drivers.
25 * These drivers are unusual in that they work on both the MIPS and PowerPC
26 * architectures. Because of that, the drivers do not support the normal
27 * PowerPC of_platform_bus_type. They support platform_bus_type instead.
28 */
29
30static struct of_device_id __initdata of_mv64x60_devices[] = {
31 { .compatible = "marvell,mv64306-devctrl", },
32 {}
33};
34
35/*
36 * Create MPSC platform devices
37 */
38static int __init mv64x60_mpsc_register_shared_pdev(struct device_node *np)
39{
40 struct platform_device *pdev;
41 struct resource r[2];
42 struct mpsc_shared_pdata pdata;
43 const phandle *ph;
44 struct device_node *mpscrouting, *mpscintr;
45 int err;
46
47 ph = of_get_property(np, "mpscrouting", NULL);
48 mpscrouting = of_find_node_by_phandle(*ph);
49 if (!mpscrouting)
50 return -ENODEV;
51
52 err = of_address_to_resource(mpscrouting, 0, &r[0]);
53 of_node_put(mpscrouting);
54 if (err)
55 return err;
56
57 ph = of_get_property(np, "mpscintr", NULL);
58 mpscintr = of_find_node_by_phandle(*ph);
59 if (!mpscintr)
60 return -ENODEV;
61
62 err = of_address_to_resource(mpscintr, 0, &r[1]);
63 of_node_put(mpscintr);
64 if (err)
65 return err;
66
67 memset(&pdata, 0, sizeof(pdata));
68
69 pdev = platform_device_alloc(MPSC_SHARED_NAME, 0);
70 if (!pdev)
71 return -ENOMEM;
72
73 err = platform_device_add_resources(pdev, r, 2);
74 if (err)
75 goto error;
76
77 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
78 if (err)
79 goto error;
80
81 err = platform_device_add(pdev);
82 if (err)
83 goto error;
84
85 return 0;
86
87error:
88 platform_device_put(pdev);
89 return err;
90}
91
92
93static int __init mv64x60_mpsc_device_setup(struct device_node *np, int id)
94{
95 struct resource r[5];
96 struct mpsc_pdata pdata;
97 struct platform_device *pdev;
98 const unsigned int *prop;
99 const phandle *ph;
100 struct device_node *sdma, *brg;
101 int err;
102 int port_number;
103
104 /* only register the shared platform device the first time through */
105 if (id == 0 && (err = mv64x60_mpsc_register_shared_pdev(np)))
106 return err;
107
108 memset(r, 0, sizeof(r));
109
110 err = of_address_to_resource(np, 0, &r[0]);
111 if (err)
112 return err;
113
114 of_irq_to_resource(np, 0, &r[4]);
115
116 ph = of_get_property(np, "sdma", NULL);
117 sdma = of_find_node_by_phandle(*ph);
118 if (!sdma)
119 return -ENODEV;
120
121 of_irq_to_resource(sdma, 0, &r[3]);
122 err = of_address_to_resource(sdma, 0, &r[1]);
123 of_node_put(sdma);
124 if (err)
125 return err;
126
127 ph = of_get_property(np, "brg", NULL);
128 brg = of_find_node_by_phandle(*ph);
129 if (!brg)
130 return -ENODEV;
131
132 err = of_address_to_resource(brg, 0, &r[2]);
133 of_node_put(brg);
134 if (err)
135 return err;
136
137 prop = of_get_property(np, "cell-index", NULL);
138 if (!prop)
139 return -ENODEV;
140 port_number = *(int *)prop;
141
142 memset(&pdata, 0, sizeof(pdata));
143
144 pdata.cache_mgmt = 1; /* All current revs need this set */
145
146 pdata.max_idle = 40; /* default */
147 prop = of_get_property(np, "max_idle", NULL);
148 if (prop)
149 pdata.max_idle = *prop;
150
151 prop = of_get_property(brg, "current-speed", NULL);
152 if (prop)
153 pdata.default_baud = *prop;
154
155 /* Default is 8 bits, no parity, no flow control */
156 pdata.default_bits = 8;
157 pdata.default_parity = 'n';
158 pdata.default_flow = 'n';
159
160 prop = of_get_property(np, "chr_1", NULL);
161 if (prop)
162 pdata.chr_1_val = *prop;
163
164 prop = of_get_property(np, "chr_2", NULL);
165 if (prop)
166 pdata.chr_2_val = *prop;
167
168 prop = of_get_property(np, "chr_10", NULL);
169 if (prop)
170 pdata.chr_10_val = *prop;
171
172 prop = of_get_property(np, "mpcr", NULL);
173 if (prop)
174 pdata.mpcr_val = *prop;
175
176 prop = of_get_property(brg, "bcr", NULL);
177 if (prop)
178 pdata.bcr_val = *prop;
179
180 pdata.brg_can_tune = 1; /* All current revs need this set */
181
182 prop = of_get_property(brg, "clock-src", NULL);
183 if (prop)
184 pdata.brg_clk_src = *prop;
185
186 prop = of_get_property(brg, "clock-frequency", NULL);
187 if (prop)
188 pdata.brg_clk_freq = *prop;
189
190 pdev = platform_device_alloc(MPSC_CTLR_NAME, port_number);
191 if (!pdev)
192 return -ENOMEM;
193 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
194
195 err = platform_device_add_resources(pdev, r, 5);
196 if (err)
197 goto error;
198
199 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
200 if (err)
201 goto error;
202
203 err = platform_device_add(pdev);
204 if (err)
205 goto error;
206
207 return 0;
208
209error:
210 platform_device_put(pdev);
211 return err;
212}
213
214/*
215 * Create mv64x60_eth platform devices
216 */
217static struct platform_device * __init mv64x60_eth_register_shared_pdev(
218 struct device_node *np, int id)
219{
220 struct platform_device *pdev;
221 struct resource r[1];
222 int err;
223
224 err = of_address_to_resource(np, 0, &r[0]);
225 if (err)
226 return ERR_PTR(err);
227
228 pdev = platform_device_register_simple(MV643XX_ETH_SHARED_NAME, id,
229 r, 1);
230 return pdev;
231}
232
233static int __init mv64x60_eth_device_setup(struct device_node *np, int id,
234 struct platform_device *shared_pdev)
235{
236 struct resource r[1];
237 struct mv643xx_eth_platform_data pdata;
238 struct platform_device *pdev;
239 struct device_node *phy;
240 const u8 *mac_addr;
241 const int *prop;
242 const phandle *ph;
243 int err;
244
245 memset(r, 0, sizeof(r));
246 of_irq_to_resource(np, 0, &r[0]);
247
248 memset(&pdata, 0, sizeof(pdata));
249
250 pdata.shared = shared_pdev;
251
252 prop = of_get_property(np, "reg", NULL);
253 if (!prop)
254 return -ENODEV;
255 pdata.port_number = *prop;
256
257 mac_addr = of_get_mac_address(np);
258 if (mac_addr)
259 memcpy(pdata.mac_addr, mac_addr, 6);
260
261 prop = of_get_property(np, "speed", NULL);
262 if (prop)
263 pdata.speed = *prop;
264
265 prop = of_get_property(np, "tx_queue_size", NULL);
266 if (prop)
267 pdata.tx_queue_size = *prop;
268
269 prop = of_get_property(np, "rx_queue_size", NULL);
270 if (prop)
271 pdata.rx_queue_size = *prop;
272
273 prop = of_get_property(np, "tx_sram_addr", NULL);
274 if (prop)
275 pdata.tx_sram_addr = *prop;
276
277 prop = of_get_property(np, "tx_sram_size", NULL);
278 if (prop)
279 pdata.tx_sram_size = *prop;
280
281 prop = of_get_property(np, "rx_sram_addr", NULL);
282 if (prop)
283 pdata.rx_sram_addr = *prop;
284
285 prop = of_get_property(np, "rx_sram_size", NULL);
286 if (prop)
287 pdata.rx_sram_size = *prop;
288
289 ph = of_get_property(np, "phy", NULL);
290 if (!ph)
291 return -ENODEV;
292
293 phy = of_find_node_by_phandle(*ph);
294 if (phy == NULL)
295 return -ENODEV;
296
297 prop = of_get_property(phy, "reg", NULL);
298 if (prop)
299 pdata.phy_addr = MV643XX_ETH_PHY_ADDR(*prop);
300
301 of_node_put(phy);
302
303 pdev = platform_device_alloc(MV643XX_ETH_NAME, id);
304 if (!pdev)
305 return -ENOMEM;
306
307 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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 pdata.freq_m = 8; /* default */
349 prop = of_get_property(np, "freq_m", NULL);
350 if (prop)
351 pdata.freq_m = *prop;
352
353 pdata.freq_m = 3; /* default */
354 prop = of_get_property(np, "freq_n", NULL);
355 if (prop)
356 pdata.freq_n = *prop;
357
358 pdata.timeout = 1000; /* default: 1 second */
359
360 pdev = platform_device_alloc(MV64XXX_I2C_CTLR_NAME, id);
361 if (!pdev)
362 return -ENOMEM;
363
364 err = platform_device_add_resources(pdev, r, 2);
365 if (err)
366 goto error;
367
368 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
369 if (err)
370 goto error;
371
372 err = platform_device_add(pdev);
373 if (err)
374 goto error;
375
376 return 0;
377
378error:
379 platform_device_put(pdev);
380 return err;
381}
382
383/*
384 * Create mv64x60_wdt platform devices
385 */
386static int __init mv64x60_wdt_device_setup(struct device_node *np, int id)
387{
388 struct resource r;
389 struct platform_device *pdev;
390 struct mv64x60_wdt_pdata pdata;
391 const unsigned int *prop;
392 int err;
393
394 err = of_address_to_resource(np, 0, &r);
395 if (err)
396 return err;
397
398 memset(&pdata, 0, sizeof(pdata));
399
400 pdata.timeout = 10; /* Default: 10 seconds */
401
402 np = of_get_parent(np);
403 if (!np)
404 return -ENODEV;
405
406 prop = of_get_property(np, "clock-frequency", NULL);
407 of_node_put(np);
408 if (!prop)
409 return -ENODEV;
410 pdata.bus_clk = *prop / 1000000; /* wdt driver wants freq in MHz */
411
412 pdev = platform_device_alloc(MV64x60_WDT_NAME, id);
413 if (!pdev)
414 return -ENOMEM;
415
416 err = platform_device_add_resources(pdev, &r, 1);
417 if (err)
418 goto error;
419
420 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
421 if (err)
422 goto error;
423
424 err = platform_device_add(pdev);
425 if (err)
426 goto error;
427
428 return 0;
429
430error:
431 platform_device_put(pdev);
432 return err;
433}
434
435static int __init mv64x60_device_setup(void)
436{
437 struct device_node *np, *np2;
438 struct platform_device *pdev;
439 int id, id2;
440 int err;
441
442 id = 0;
443 for_each_compatible_node(np, "serial", "marvell,mv64360-mpsc") {
444 err = mv64x60_mpsc_device_setup(np, id++);
445 if (err)
446 printk(KERN_ERR "Failed to initialize MV64x60 "
447 "serial device %s: error %d.\n",
448 np->full_name, err);
449 }
450
451 id = 0;
452 id2 = 0;
453 for_each_compatible_node(np, NULL, "marvell,mv64360-eth-group") {
454 pdev = mv64x60_eth_register_shared_pdev(np, id++);
455 if (IS_ERR(pdev)) {
456 err = PTR_ERR(pdev);
457 printk(KERN_ERR "Failed to initialize MV64x60 "
458 "network block %s: error %d.\n",
459 np->full_name, err);
460 continue;
461 }
462 for_each_child_of_node(np, np2) {
463 if (!of_device_is_compatible(np2,
464 "marvell,mv64360-eth"))
465 continue;
466 err = mv64x60_eth_device_setup(np2, id2++, pdev);
467 if (err)
468 printk(KERN_ERR "Failed to initialize "
469 "MV64x60 network device %s: "
470 "error %d.\n",
471 np2->full_name, err);
472 }
473 }
474
475 id = 0;
476 for_each_compatible_node(np, "i2c", "marvell,mv64360-i2c") {
477 err = mv64x60_i2c_device_setup(np, id++);
478 if (err)
479 printk(KERN_ERR "Failed to initialize MV64x60 I2C "
480 "bus %s: error %d.\n",
481 np->full_name, err);
482 }
483
484 /* support up to one watchdog timer */
485 np = of_find_compatible_node(np, NULL, "marvell,mv64360-wdt");
486 if (np) {
487 if ((err = mv64x60_wdt_device_setup(np, id)))
488 printk(KERN_ERR "Failed to initialize MV64x60 "
489 "Watchdog %s: error %d.\n",
490 np->full_name, err);
491 of_node_put(np);
492 }
493
494 /* Now add every node that is on the device bus */
495 for_each_compatible_node(np, NULL, "marvell,mv64360")
496 of_platform_bus_probe(np, of_mv64x60_devices, NULL);
497
498 return 0;
499}
500arch_initcall(mv64x60_device_setup);
501
502static int __init mv64x60_add_mpsc_console(void)
503{
504 struct device_node *np = NULL;
505 const char *prop;
506
507 prop = of_get_property(of_chosen, "linux,stdout-path", NULL);
508 if (prop == NULL)
509 goto not_mpsc;
510
511 np = of_find_node_by_path(prop);
512 if (!np)
513 goto not_mpsc;
514
515 if (!of_device_is_compatible(np, "marvell,mv64360-mpsc"))
516 goto not_mpsc;
517
518 prop = of_get_property(np, "cell-index", NULL);
519 if (!prop)
520 goto not_mpsc;
521
522 add_preferred_console("ttyMM", *(int *)prop, NULL);
523
524not_mpsc:
525 return 0;
526}
527console_initcall(mv64x60_add_mpsc_console);