1 /*
2 * iop13xx platform Initialization
3 * Copyright (c) 2005-2006, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
17 *
18 */
19
20 #include <linux/dma-mapping.h>
21 #include <linux/serial_8250.h>
22 #include <linux/io.h>
23 #include <linux/reboot.h>
24 #ifdef CONFIG_MTD_PHYSMAP
25 #include <linux/mtd/physmap.h>
26 #endif
27 #include <asm/mach/map.h>
28 #include <mach/hardware.h>
29 #include <asm/irq.h>
30 #include <asm/hardware/iop_adma.h>
31 #include <mach/irqs.h>
32
33 #define IOP13XX_UART_XTAL 33334000
34 #define IOP13XX_SETUP_DEBUG 0
35 #define PRINTK(x...) ((void)(IOP13XX_SETUP_DEBUG && printk(x)))
36
37 /* Standard IO mapping for all IOP13XX based systems
38 */
39 static struct map_desc iop13xx_std_desc[] __initdata = {
40 { /* mem mapped registers */
41 .virtual = (unsigned long)IOP13XX_PMMR_VIRT_MEM_BASE,
42 .pfn = __phys_to_pfn(IOP13XX_PMMR_PHYS_MEM_BASE),
43 .length = IOP13XX_PMMR_SIZE,
44 .type = MT_DEVICE,
45 },
46 };
47
48 static struct resource iop13xx_uart0_resources[] = {
49 [0] = {
50 .start = IOP13XX_UART0_PHYS,
51 .end = IOP13XX_UART0_PHYS + 0x3f,
52 .flags = IORESOURCE_MEM,
53 },
54 [1] = {
55 .start = IRQ_IOP13XX_UART0,
56 .end = IRQ_IOP13XX_UART0,
57 .flags = IORESOURCE_IRQ
58 }
59 };
60
61 static struct resource iop13xx_uart1_resources[] = {
62 [0] = {
63 .start = IOP13XX_UART1_PHYS,
64 .end = IOP13XX_UART1_PHYS + 0x3f,
65 .flags = IORESOURCE_MEM,
66 },
67 [1] = {
68 .start = IRQ_IOP13XX_UART1,
69 .end = IRQ_IOP13XX_UART1,
70 .flags = IORESOURCE_IRQ
71 }
72 };
73
74 static struct plat_serial8250_port iop13xx_uart0_data[] = {
75 {
76 .membase = IOP13XX_UART0_VIRT,
77 .mapbase = IOP13XX_UART0_PHYS,
78 .irq = IRQ_IOP13XX_UART0,
79 .uartclk = IOP13XX_UART_XTAL,
80 .regshift = 2,
81 .iotype = UPIO_MEM,
82 .flags = UPF_SKIP_TEST,
83 },
84 { },
85 };
86
87 static struct plat_serial8250_port iop13xx_uart1_data[] = {
88 {
89 .membase = IOP13XX_UART1_VIRT,
90 .mapbase = IOP13XX_UART1_PHYS,
91 .irq = IRQ_IOP13XX_UART1,
92 .uartclk = IOP13XX_UART_XTAL,
93 .regshift = 2,
94 .iotype = UPIO_MEM,
95 .flags = UPF_SKIP_TEST,
96 },
97 { },
98 };
99
100 /* The ids are fixed up later in iop13xx_platform_init */
101 static struct platform_device iop13xx_uart0 = {
102 .name = "serial8250",
103 .id = 0,
104 .dev.platform_data = iop13xx_uart0_data,
105 .num_resources = 2,
106 .resource = iop13xx_uart0_resources,
107 };
108
109 static struct platform_device iop13xx_uart1 = {
110 .name = "serial8250",
111 .id = 0,
112 .dev.platform_data = iop13xx_uart1_data,
113 .num_resources = 2,
114 .resource = iop13xx_uart1_resources
115 };
116
117 static struct resource iop13xx_i2c_0_resources[] = {
118 [0] = {
119 .start = IOP13XX_I2C0_PHYS,
120 .end = IOP13XX_I2C0_PHYS + 0x18,
121 .flags = IORESOURCE_MEM,
122 },
123 [1] = {
124 .start = IRQ_IOP13XX_I2C_0,
125 .end = IRQ_IOP13XX_I2C_0,
126 .flags = IORESOURCE_IRQ
127 }
128 };
129
130 static struct resource iop13xx_i2c_1_resources[] = {
131 [0] = {
132 .start = IOP13XX_I2C1_PHYS,
133 .end = IOP13XX_I2C1_PHYS + 0x18,
134 .flags = IORESOURCE_MEM,
135 },
136 [1] = {
137 .start = IRQ_IOP13XX_I2C_1,
138 .end = IRQ_IOP13XX_I2C_1,
139 .flags = IORESOURCE_IRQ
140 }
141 };
142
143 static struct resource iop13xx_i2c_2_resources[] = {
144 [0] = {
145 .start = IOP13XX_I2C2_PHYS,
146 .end = IOP13XX_I2C2_PHYS + 0x18,
147 .flags = IORESOURCE_MEM,
148 },
149 [1] = {
150 .start = IRQ_IOP13XX_I2C_2,
151 .end = IRQ_IOP13XX_I2C_2,
152 .flags = IORESOURCE_IRQ
153 }
154 };
155
156 /* I2C controllers. The IOP13XX uses the same block as the IOP3xx, so
157 * we just use the same device name.
158 */
159
160 /* The ids are fixed up later in iop13xx_platform_init */
161 static struct platform_device iop13xx_i2c_0_controller = {
162 .name = "IOP3xx-I2C",
163 .id = 0,
164 .num_resources = 2,
165 .resource = iop13xx_i2c_0_resources
166 };
167
168 static struct platform_device iop13xx_i2c_1_controller = {
169 .name = "IOP3xx-I2C",
170 .id = 0,
171 .num_resources = 2,
172 .resource = iop13xx_i2c_1_resources
173 };
174
175 static struct platform_device iop13xx_i2c_2_controller = {
176 .name = "IOP3xx-I2C",
177 .id = 0,
178 .num_resources = 2,
179 .resource = iop13xx_i2c_2_resources
180 };
181
182 #ifdef CONFIG_MTD_PHYSMAP
183 /* PBI Flash Device
184 */
185 static struct physmap_flash_data iq8134x_flash_data = {
186 .width = 2,
187 };
188
189 static struct resource iq8134x_flash_resource = {
190 .start = IQ81340_FLASHBASE,
191 .end = 0,
192 .flags = IORESOURCE_MEM,
193 };
194
195 static struct platform_device iq8134x_flash = {
196 .name = "physmap-flash",
197 .id = 0,
198 .dev = { .platform_data = &iq8134x_flash_data, },
199 .num_resources = 1,
200 .resource = &iq8134x_flash_resource,
201 };
202
iq8134x_probe_flash_size(void)203 static unsigned long iq8134x_probe_flash_size(void)
204 {
205 uint8_t __iomem *flash_addr = ioremap(IQ81340_FLASHBASE, PAGE_SIZE);
206 int i;
207 char query[3];
208 unsigned long size = 0;
209 int width = iq8134x_flash_data.width;
210
211 if (flash_addr) {
212 /* send CFI 'query' command */
213 writew(0x98, flash_addr);
214
215 /* check for CFI compliance */
216 for (i = 0; i < 3 * width; i += width)
217 query[i / width] = readb(flash_addr + (0x10 * width) + i);
218
219 /* read the size */
220 if (memcmp(query, "QRY", 3) == 0)
221 size = 1 << readb(flash_addr + (0x27 * width));
222
223 /* send CFI 'read array' command */
224 writew(0xff, flash_addr);
225
226 iounmap(flash_addr);
227 }
228
229 return size;
230 }
231 #endif
232
233 /* ADMA Channels */
234 static struct resource iop13xx_adma_0_resources[] = {
235 [0] = {
236 .start = IOP13XX_ADMA_PHYS_BASE(0),
237 .end = IOP13XX_ADMA_UPPER_PA(0),
238 .flags = IORESOURCE_MEM,
239 },
240 [1] = {
241 .start = IRQ_IOP13XX_ADMA0_EOT,
242 .end = IRQ_IOP13XX_ADMA0_EOT,
243 .flags = IORESOURCE_IRQ
244 },
245 [2] = {
246 .start = IRQ_IOP13XX_ADMA0_EOC,
247 .end = IRQ_IOP13XX_ADMA0_EOC,
248 .flags = IORESOURCE_IRQ
249 },
250 [3] = {
251 .start = IRQ_IOP13XX_ADMA0_ERR,
252 .end = IRQ_IOP13XX_ADMA0_ERR,
253 .flags = IORESOURCE_IRQ
254 }
255 };
256
257 static struct resource iop13xx_adma_1_resources[] = {
258 [0] = {
259 .start = IOP13XX_ADMA_PHYS_BASE(1),
260 .end = IOP13XX_ADMA_UPPER_PA(1),
261 .flags = IORESOURCE_MEM,
262 },
263 [1] = {
264 .start = IRQ_IOP13XX_ADMA1_EOT,
265 .end = IRQ_IOP13XX_ADMA1_EOT,
266 .flags = IORESOURCE_IRQ
267 },
268 [2] = {
269 .start = IRQ_IOP13XX_ADMA1_EOC,
270 .end = IRQ_IOP13XX_ADMA1_EOC,
271 .flags = IORESOURCE_IRQ
272 },
273 [3] = {
274 .start = IRQ_IOP13XX_ADMA1_ERR,
275 .end = IRQ_IOP13XX_ADMA1_ERR,
276 .flags = IORESOURCE_IRQ
277 }
278 };
279
280 static struct resource iop13xx_adma_2_resources[] = {
281 [0] = {
282 .start = IOP13XX_ADMA_PHYS_BASE(2),
283 .end = IOP13XX_ADMA_UPPER_PA(2),
284 .flags = IORESOURCE_MEM,
285 },
286 [1] = {
287 .start = IRQ_IOP13XX_ADMA2_EOT,
288 .end = IRQ_IOP13XX_ADMA2_EOT,
289 .flags = IORESOURCE_IRQ
290 },
291 [2] = {
292 .start = IRQ_IOP13XX_ADMA2_EOC,
293 .end = IRQ_IOP13XX_ADMA2_EOC,
294 .flags = IORESOURCE_IRQ
295 },
296 [3] = {
297 .start = IRQ_IOP13XX_ADMA2_ERR,
298 .end = IRQ_IOP13XX_ADMA2_ERR,
299 .flags = IORESOURCE_IRQ
300 }
301 };
302
303 static u64 iop13xx_adma_dmamask = DMA_BIT_MASK(64);
304 static struct iop_adma_platform_data iop13xx_adma_0_data = {
305 .hw_id = 0,
306 .pool_size = PAGE_SIZE,
307 };
308
309 static struct iop_adma_platform_data iop13xx_adma_1_data = {
310 .hw_id = 1,
311 .pool_size = PAGE_SIZE,
312 };
313
314 static struct iop_adma_platform_data iop13xx_adma_2_data = {
315 .hw_id = 2,
316 .pool_size = PAGE_SIZE,
317 };
318
319 /* The ids are fixed up later in iop13xx_platform_init */
320 static struct platform_device iop13xx_adma_0_channel = {
321 .name = "iop-adma",
322 .id = 0,
323 .num_resources = 4,
324 .resource = iop13xx_adma_0_resources,
325 .dev = {
326 .dma_mask = &iop13xx_adma_dmamask,
327 .coherent_dma_mask = DMA_BIT_MASK(64),
328 .platform_data = (void *) &iop13xx_adma_0_data,
329 },
330 };
331
332 static struct platform_device iop13xx_adma_1_channel = {
333 .name = "iop-adma",
334 .id = 0,
335 .num_resources = 4,
336 .resource = iop13xx_adma_1_resources,
337 .dev = {
338 .dma_mask = &iop13xx_adma_dmamask,
339 .coherent_dma_mask = DMA_BIT_MASK(64),
340 .platform_data = (void *) &iop13xx_adma_1_data,
341 },
342 };
343
344 static struct platform_device iop13xx_adma_2_channel = {
345 .name = "iop-adma",
346 .id = 0,
347 .num_resources = 4,
348 .resource = iop13xx_adma_2_resources,
349 .dev = {
350 .dma_mask = &iop13xx_adma_dmamask,
351 .coherent_dma_mask = DMA_BIT_MASK(64),
352 .platform_data = (void *) &iop13xx_adma_2_data,
353 },
354 };
355
iop13xx_map_io(void)356 void __init iop13xx_map_io(void)
357 {
358 /* Initialize the Static Page Table maps */
359 iotable_init(iop13xx_std_desc, ARRAY_SIZE(iop13xx_std_desc));
360 }
361
362 static int init_uart;
363 static int init_i2c;
364 static int init_adma;
365
iop13xx_platform_init(void)366 void __init iop13xx_platform_init(void)
367 {
368 int i;
369 u32 uart_idx, i2c_idx, adma_idx, plat_idx;
370 struct platform_device *iop13xx_devices[IQ81340_MAX_PLAT_DEVICES];
371
372 /* set the bases so we can read the device id */
373 iop13xx_set_atu_mmr_bases();
374
375 memset(iop13xx_devices, 0, sizeof(iop13xx_devices));
376
377 if (init_uart == IOP13XX_INIT_UART_DEFAULT) {
378 switch (iop13xx_dev_id()) {
379 /* enable both uarts on iop341 */
380 case 0x3380:
381 case 0x3384:
382 case 0x3388:
383 case 0x338c:
384 init_uart |= IOP13XX_INIT_UART_0;
385 init_uart |= IOP13XX_INIT_UART_1;
386 break;
387 /* only enable uart 1 */
388 default:
389 init_uart |= IOP13XX_INIT_UART_1;
390 }
391 }
392
393 if (init_i2c == IOP13XX_INIT_I2C_DEFAULT) {
394 switch (iop13xx_dev_id()) {
395 /* enable all i2c units on iop341 and iop342 */
396 case 0x3380:
397 case 0x3384:
398 case 0x3388:
399 case 0x338c:
400 case 0x3382:
401 case 0x3386:
402 case 0x338a:
403 case 0x338e:
404 init_i2c |= IOP13XX_INIT_I2C_0;
405 init_i2c |= IOP13XX_INIT_I2C_1;
406 init_i2c |= IOP13XX_INIT_I2C_2;
407 break;
408 /* only enable i2c 1 and 2 */
409 default:
410 init_i2c |= IOP13XX_INIT_I2C_1;
411 init_i2c |= IOP13XX_INIT_I2C_2;
412 }
413 }
414
415 if (init_adma == IOP13XX_INIT_ADMA_DEFAULT) {
416 init_adma |= IOP13XX_INIT_ADMA_0;
417 init_adma |= IOP13XX_INIT_ADMA_1;
418 init_adma |= IOP13XX_INIT_ADMA_2;
419 }
420
421 plat_idx = 0;
422 uart_idx = 0;
423 i2c_idx = 0;
424
425 /* uart 1 (if enabled) is ttyS0 */
426 if (init_uart & IOP13XX_INIT_UART_1) {
427 PRINTK("Adding uart1 to platform device list\n");
428 iop13xx_uart1.id = uart_idx++;
429 iop13xx_devices[plat_idx++] = &iop13xx_uart1;
430 }
431 if (init_uart & IOP13XX_INIT_UART_0) {
432 PRINTK("Adding uart0 to platform device list\n");
433 iop13xx_uart0.id = uart_idx++;
434 iop13xx_devices[plat_idx++] = &iop13xx_uart0;
435 }
436
437 for(i = 0; i < IQ81340_NUM_I2C; i++) {
438 if ((init_i2c & (1 << i)) && IOP13XX_SETUP_DEBUG)
439 printk("Adding i2c%d to platform device list\n", i);
440 switch(init_i2c & (1 << i)) {
441 case IOP13XX_INIT_I2C_0:
442 iop13xx_i2c_0_controller.id = i2c_idx++;
443 iop13xx_devices[plat_idx++] =
444 &iop13xx_i2c_0_controller;
445 break;
446 case IOP13XX_INIT_I2C_1:
447 iop13xx_i2c_1_controller.id = i2c_idx++;
448 iop13xx_devices[plat_idx++] =
449 &iop13xx_i2c_1_controller;
450 break;
451 case IOP13XX_INIT_I2C_2:
452 iop13xx_i2c_2_controller.id = i2c_idx++;
453 iop13xx_devices[plat_idx++] =
454 &iop13xx_i2c_2_controller;
455 break;
456 }
457 }
458
459 /* initialize adma channel ids and capabilities */
460 adma_idx = 0;
461 for (i = 0; i < IQ81340_NUM_ADMA; i++) {
462 struct iop_adma_platform_data *plat_data;
463 if ((init_adma & (1 << i)) && IOP13XX_SETUP_DEBUG)
464 printk(KERN_INFO
465 "Adding adma%d to platform device list\n", i);
466 switch (init_adma & (1 << i)) {
467 case IOP13XX_INIT_ADMA_0:
468 iop13xx_adma_0_channel.id = adma_idx++;
469 iop13xx_devices[plat_idx++] = &iop13xx_adma_0_channel;
470 plat_data = &iop13xx_adma_0_data;
471 dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
472 dma_cap_set(DMA_XOR, plat_data->cap_mask);
473 dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
474 dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
475 break;
476 case IOP13XX_INIT_ADMA_1:
477 iop13xx_adma_1_channel.id = adma_idx++;
478 iop13xx_devices[plat_idx++] = &iop13xx_adma_1_channel;
479 plat_data = &iop13xx_adma_1_data;
480 dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
481 dma_cap_set(DMA_XOR, plat_data->cap_mask);
482 dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
483 dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
484 break;
485 case IOP13XX_INIT_ADMA_2:
486 iop13xx_adma_2_channel.id = adma_idx++;
487 iop13xx_devices[plat_idx++] = &iop13xx_adma_2_channel;
488 plat_data = &iop13xx_adma_2_data;
489 dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
490 dma_cap_set(DMA_XOR, plat_data->cap_mask);
491 dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
492 dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
493 dma_cap_set(DMA_PQ, plat_data->cap_mask);
494 dma_cap_set(DMA_PQ_VAL, plat_data->cap_mask);
495 break;
496 }
497 }
498
499 #ifdef CONFIG_MTD_PHYSMAP
500 iq8134x_flash_resource.end = iq8134x_flash_resource.start +
501 iq8134x_probe_flash_size() - 1;
502 if (iq8134x_flash_resource.end > iq8134x_flash_resource.start)
503 iop13xx_devices[plat_idx++] = &iq8134x_flash;
504 else
505 printk(KERN_ERR "%s: Failed to probe flash size\n", __func__);
506 #endif
507
508 platform_add_devices(iop13xx_devices, plat_idx);
509 }
510
iop13xx_init_uart_setup(char * str)511 static int __init iop13xx_init_uart_setup(char *str)
512 {
513 if (str) {
514 while (*str != '\0') {
515 switch(*str) {
516 case '0':
517 init_uart |= IOP13XX_INIT_UART_0;
518 break;
519 case '1':
520 init_uart |= IOP13XX_INIT_UART_1;
521 break;
522 case ',':
523 case '=':
524 break;
525 default:
526 PRINTK("\"iop13xx_init_uart\" malformed"
527 " at character: \'%c\'", *str);
528 *(str + 1) = '\0';
529 init_uart = IOP13XX_INIT_UART_DEFAULT;
530 }
531 str++;
532 }
533 }
534 return 1;
535 }
536
iop13xx_init_i2c_setup(char * str)537 static int __init iop13xx_init_i2c_setup(char *str)
538 {
539 if (str) {
540 while (*str != '\0') {
541 switch(*str) {
542 case '0':
543 init_i2c |= IOP13XX_INIT_I2C_0;
544 break;
545 case '1':
546 init_i2c |= IOP13XX_INIT_I2C_1;
547 break;
548 case '2':
549 init_i2c |= IOP13XX_INIT_I2C_2;
550 break;
551 case ',':
552 case '=':
553 break;
554 default:
555 PRINTK("\"iop13xx_init_i2c\" malformed"
556 " at character: \'%c\'", *str);
557 *(str + 1) = '\0';
558 init_i2c = IOP13XX_INIT_I2C_DEFAULT;
559 }
560 str++;
561 }
562 }
563 return 1;
564 }
565
iop13xx_init_adma_setup(char * str)566 static int __init iop13xx_init_adma_setup(char *str)
567 {
568 if (str) {
569 while (*str != '\0') {
570 switch (*str) {
571 case '0':
572 init_adma |= IOP13XX_INIT_ADMA_0;
573 break;
574 case '1':
575 init_adma |= IOP13XX_INIT_ADMA_1;
576 break;
577 case '2':
578 init_adma |= IOP13XX_INIT_ADMA_2;
579 break;
580 case ',':
581 case '=':
582 break;
583 default:
584 PRINTK("\"iop13xx_init_adma\" malformed"
585 " at character: \'%c\'", *str);
586 *(str + 1) = '\0';
587 init_adma = IOP13XX_INIT_ADMA_DEFAULT;
588 }
589 str++;
590 }
591 }
592 return 1;
593 }
594
595 __setup("iop13xx_init_adma", iop13xx_init_adma_setup);
596 __setup("iop13xx_init_uart", iop13xx_init_uart_setup);
597 __setup("iop13xx_init_i2c", iop13xx_init_i2c_setup);
598
iop13xx_restart(enum reboot_mode mode,const char * cmd)599 void iop13xx_restart(enum reboot_mode mode, const char *cmd)
600 {
601 /*
602 * Reset the internal bus (warning both cores are reset)
603 */
604 write_wdtcr(IOP_WDTCR_EN_ARM);
605 write_wdtcr(IOP_WDTCR_EN);
606 write_wdtsr(IOP13XX_WDTSR_WRITE_EN | IOP13XX_WDTCR_IB_RESET);
607 write_wdtcr(0x1000);
608 }
609