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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / arm / mach-orion5x / ts78xx-setup.c
blobc1c1cd04bdde4dc77dd4408096048c3f45b47964
1 /*
2 * arch/arm/mach-orion5x/ts78xx-setup.c
3 *
4 * Maintainer: Alexander Clouter <alex@digriz.org.uk>
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/sysfs.h>
14 #include <linux/platform_device.h>
15 #include <linux/mv643xx_eth.h>
16 #include <linux/ata_platform.h>
17 #include <linux/m48t86.h>
18 #include <linux/mtd/nand.h>
19 #include <linux/mtd/partitions.h>
20 #include <linux/timeriomem-rng.h>
21 #include <asm/mach-types.h>
22 #include <asm/mach/arch.h>
23 #include <asm/mach/map.h>
24 #include <mach/orion5x.h>
25 #include "common.h"
26 #include "mpp.h"
27 #include "ts78xx-fpga.h"
28
29 /*****************************************************************************
30 * TS-78xx Info
31 ****************************************************************************/
32
33 /*
34 * FPGA - lives where the PCI bus would be at ORION5X_PCI_MEM_PHYS_BASE
35 */
36 #define TS78XX_FPGA_REGS_PHYS_BASE 0xe8000000
37 #define TS78XX_FPGA_REGS_VIRT_BASE 0xff900000
38 #define TS78XX_FPGA_REGS_SIZE SZ_1M
39
40 static struct ts78xx_fpga_data ts78xx_fpga = {
41 .id = 0,
42 .state = 1,
43 /* .supports = ... - populated by ts78xx_fpga_supports() */
44 };
45
46 /*****************************************************************************
47 * I/O Address Mapping
48 ****************************************************************************/
49 static struct map_desc ts78xx_io_desc[] __initdata = {
50 {
51 .virtual = TS78XX_FPGA_REGS_VIRT_BASE,
52 .pfn = __phys_to_pfn(TS78XX_FPGA_REGS_PHYS_BASE),
53 .length = TS78XX_FPGA_REGS_SIZE,
54 .type = MT_DEVICE,
55 },
56 };
57
58 void __init ts78xx_map_io(void)
59 {
60 orion5x_map_io();
61 iotable_init(ts78xx_io_desc, ARRAY_SIZE(ts78xx_io_desc));
62 }
63
64 /*****************************************************************************
65 * Ethernet
66 ****************************************************************************/
67 static struct mv643xx_eth_platform_data ts78xx_eth_data = {
68 .phy_addr = MV643XX_ETH_PHY_ADDR(0),
69 };
70
71 /*****************************************************************************
72 * SATA
73 ****************************************************************************/
74 static struct mv_sata_platform_data ts78xx_sata_data = {
75 .n_ports = 2,
76 };
77
78 /*****************************************************************************
79 * RTC M48T86 - nicked^Wborrowed from arch/arm/mach-ep93xx/ts72xx.c
80 ****************************************************************************/
81 #define TS_RTC_CTRL (TS78XX_FPGA_REGS_VIRT_BASE | 0x808)
82 #define TS_RTC_DATA (TS78XX_FPGA_REGS_VIRT_BASE | 0x80c)
83
84 static unsigned char ts78xx_ts_rtc_readbyte(unsigned long addr)
85 {
86 writeb(addr, TS_RTC_CTRL);
87 return readb(TS_RTC_DATA);
88 }
89
90 static void ts78xx_ts_rtc_writebyte(unsigned char value, unsigned long addr)
91 {
92 writeb(addr, TS_RTC_CTRL);
93 writeb(value, TS_RTC_DATA);
94 }
95
96 static struct m48t86_ops ts78xx_ts_rtc_ops = {
97 .readbyte = ts78xx_ts_rtc_readbyte,
98 .writebyte = ts78xx_ts_rtc_writebyte,
99 };
100
101 static struct platform_device ts78xx_ts_rtc_device = {
102 .name = "rtc-m48t86",
103 .id = -1,
104 .dev = {
105 .platform_data = &ts78xx_ts_rtc_ops,
106 },
107 .num_resources = 0,
108 };
109
110 /*
111 * TS uses some of the user storage space on the RTC chip so see if it is
112 * present; as it's an optional feature at purchase time and not all boards
113 * will have it present
114 *
115 * I've used the method TS use in their rtc7800.c example for the detection
116 *
117 * TODO: track down a guinea pig without an RTC to see if we can work out a
118 * better RTC detection routine
119 */
120 static int ts78xx_ts_rtc_load(void)
121 {
122 int rc;
123 unsigned char tmp_rtc0, tmp_rtc1;
124
125 tmp_rtc0 = ts78xx_ts_rtc_readbyte(126);
126 tmp_rtc1 = ts78xx_ts_rtc_readbyte(127);
127
128 ts78xx_ts_rtc_writebyte(0x00, 126);
129 ts78xx_ts_rtc_writebyte(0x55, 127);
130 if (ts78xx_ts_rtc_readbyte(127) == 0x55) {
131 ts78xx_ts_rtc_writebyte(0xaa, 127);
132 if (ts78xx_ts_rtc_readbyte(127) == 0xaa
133 && ts78xx_ts_rtc_readbyte(126) == 0x00) {
134 ts78xx_ts_rtc_writebyte(tmp_rtc0, 126);
135 ts78xx_ts_rtc_writebyte(tmp_rtc1, 127);
136
137 if (ts78xx_fpga.supports.ts_rtc.init == 0) {
138 rc = platform_device_register(&ts78xx_ts_rtc_device);
139 if (!rc)
140 ts78xx_fpga.supports.ts_rtc.init = 1;
141 } else
142 rc = platform_device_add(&ts78xx_ts_rtc_device);
143
144 return rc;
145 }
146 }
147
148 return -ENODEV;
149 };
150
151 static void ts78xx_ts_rtc_unload(void)
152 {
153 platform_device_del(&ts78xx_ts_rtc_device);
154 }
155
156 /*****************************************************************************
157 * NAND Flash
158 ****************************************************************************/
159 #define TS_NAND_CTRL (TS78XX_FPGA_REGS_VIRT_BASE | 0x800) /* VIRT */
160 #define TS_NAND_DATA (TS78XX_FPGA_REGS_PHYS_BASE | 0x804) /* PHYS */
161
162 /*
163 * hardware specific access to control-lines
164 *
165 * ctrl:
166 * NAND_NCE: bit 0 -> bit 2
167 * NAND_CLE: bit 1 -> bit 1
168 * NAND_ALE: bit 2 -> bit 0
169 */
170 static void ts78xx_ts_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
171 unsigned int ctrl)
172 {
173 struct nand_chip *this = mtd->priv;
174
175 if (ctrl & NAND_CTRL_CHANGE) {
176 unsigned char bits;
177
178 bits = (ctrl & NAND_NCE) << 2;
179 bits |= ctrl & NAND_CLE;
180 bits |= (ctrl & NAND_ALE) >> 2;
181
182 writeb((readb(TS_NAND_CTRL) & ~0x7) | bits, TS_NAND_CTRL);
183 }
184
185 if (cmd != NAND_CMD_NONE)
186 writeb(cmd, this->IO_ADDR_W);
187 }
188
189 static int ts78xx_ts_nand_dev_ready(struct mtd_info *mtd)
190 {
191 return readb(TS_NAND_CTRL) & 0x20;
192 }
193
194 const char *ts_nand_part_probes[] = { "cmdlinepart", NULL };
195
196 static struct mtd_partition ts78xx_ts_nand_parts[] = {
197 {
198 .name = "mbr",
199 .offset = 0,
200 .size = SZ_128K,
201 .mask_flags = MTD_WRITEABLE,
202 }, {
203 .name = "kernel",
204 .offset = MTDPART_OFS_APPEND,
205 .size = SZ_4M,
206 }, {
207 .name = "initrd",
208 .offset = MTDPART_OFS_APPEND,
209 .size = SZ_4M,
210 }, {
211 .name = "rootfs",
212 .offset = MTDPART_OFS_APPEND,
213 .size = MTDPART_SIZ_FULL,
214 }
215 };
216
217 static struct platform_nand_data ts78xx_ts_nand_data = {
218 .chip = {
219 .nr_chips = 1,
220 .part_probe_types = ts_nand_part_probes,
221 .partitions = ts78xx_ts_nand_parts,
222 .nr_partitions = ARRAY_SIZE(ts78xx_ts_nand_parts),
223 .chip_delay = 15,
224 .options = NAND_USE_FLASH_BBT,
225 },
226 .ctrl = {
227 /*
228 * The HW ECC offloading functions, used to give about a 9%
229 * performance increase for 'dd if=/dev/mtdblockX' and 5% for
230 * nanddump. This all however was changed by git commit
231 * e6cf5df1838c28bb060ac45b5585e48e71bbc740 so now there is
232 * no performance advantage to be had so we no longer bother
233 */
234 .cmd_ctrl = ts78xx_ts_nand_cmd_ctrl,
235 .dev_ready = ts78xx_ts_nand_dev_ready,
236 },
237 };
238
239 static struct resource ts78xx_ts_nand_resources = {
240 .start = TS_NAND_DATA,
241 .end = TS_NAND_DATA + 4,
242 .flags = IORESOURCE_MEM,
243 };
244
245 static struct platform_device ts78xx_ts_nand_device = {
246 .name = "gen_nand",
247 .id = -1,
248 .dev = {
249 .platform_data = &ts78xx_ts_nand_data,
250 },
251 .resource = &ts78xx_ts_nand_resources,
252 .num_resources = 1,
253 };
254
255 static int ts78xx_ts_nand_load(void)
256 {
257 int rc;
258
259 if (ts78xx_fpga.supports.ts_nand.init == 0) {
260 rc = platform_device_register(&ts78xx_ts_nand_device);
261 if (!rc)
262 ts78xx_fpga.supports.ts_nand.init = 1;
263 } else
264 rc = platform_device_add(&ts78xx_ts_nand_device);
265
266 return rc;
267 };
268
269 static void ts78xx_ts_nand_unload(void)
270 {
271 platform_device_del(&ts78xx_ts_nand_device);
272 }
273
274 /*****************************************************************************
275 * HW RNG
276 ****************************************************************************/
277 #define TS_RNG_DATA (TS78XX_FPGA_REGS_PHYS_BASE | 0x044)
278
279 static struct resource ts78xx_ts_rng_resource = {
280 .flags = IORESOURCE_MEM,
281 .start = TS_RNG_DATA,
282 .end = TS_RNG_DATA + 4 - 1,
283 };
284
285 static struct timeriomem_rng_data ts78xx_ts_rng_data = {
286 .period = 1000000, /* one second */
287 };
288
289 static struct platform_device ts78xx_ts_rng_device = {
290 .name = "timeriomem_rng",
291 .id = -1,
292 .dev = {
293 .platform_data = &ts78xx_ts_rng_data,
294 },
295 .resource = &ts78xx_ts_rng_resource,
296 .num_resources = 1,
297 };
298
299 static int ts78xx_ts_rng_load(void)
300 {
301 int rc;
302
303 if (ts78xx_fpga.supports.ts_rng.init == 0) {
304 rc = platform_device_register(&ts78xx_ts_rng_device);
305 if (!rc)
306 ts78xx_fpga.supports.ts_rng.init = 1;
307 } else
308 rc = platform_device_add(&ts78xx_ts_rng_device);
309
310 return rc;
311 };
312
313 static void ts78xx_ts_rng_unload(void)
314 {
315 platform_device_del(&ts78xx_ts_rng_device);
316 }
317
318 /*****************************************************************************
319 * FPGA 'hotplug' support code
320 ****************************************************************************/
321 static void ts78xx_fpga_devices_zero_init(void)
322 {
323 ts78xx_fpga.supports.ts_rtc.init = 0;
324 ts78xx_fpga.supports.ts_nand.init = 0;
325 ts78xx_fpga.supports.ts_rng.init = 0;
326 }
327
328 static void ts78xx_fpga_supports(void)
329 {
330 /* TODO: put this 'table' into ts78xx-fpga.h */
331 switch (ts78xx_fpga.id) {
332 case TS7800_REV_1:
333 case TS7800_REV_2:
334 case TS7800_REV_3:
335 case TS7800_REV_4:
336 case TS7800_REV_5:
337 ts78xx_fpga.supports.ts_rtc.present = 1;
338 ts78xx_fpga.supports.ts_nand.present = 1;
339 ts78xx_fpga.supports.ts_rng.present = 1;
340 break;
341 default:
342 ts78xx_fpga.supports.ts_rtc.present = 0;
343 ts78xx_fpga.supports.ts_nand.present = 0;
344 ts78xx_fpga.supports.ts_rng.present = 0;
345 }
346 }
347
348 static int ts78xx_fpga_load_devices(void)
349 {
350 int tmp, ret = 0;
351
352 if (ts78xx_fpga.supports.ts_rtc.present == 1) {
353 tmp = ts78xx_ts_rtc_load();
354 if (tmp) {
355 printk(KERN_INFO "TS-78xx: RTC not registered\n");
356 ts78xx_fpga.supports.ts_rtc.present = 0;
357 }
358 ret |= tmp;
359 }
360 if (ts78xx_fpga.supports.ts_nand.present == 1) {
361 tmp = ts78xx_ts_nand_load();
362 if (tmp) {
363 printk(KERN_INFO "TS-78xx: NAND not registered\n");
364 ts78xx_fpga.supports.ts_nand.present = 0;
365 }
366 ret |= tmp;
367 }
368 if (ts78xx_fpga.supports.ts_rng.present == 1) {
369 tmp = ts78xx_ts_rng_load();
370 if (tmp) {
371 printk(KERN_INFO "TS-78xx: RNG not registered\n");
372 ts78xx_fpga.supports.ts_rng.present = 0;
373 }
374 ret |= tmp;
375 }
376
377 return ret;
378 }
379
380 static int ts78xx_fpga_unload_devices(void)
381 {
382 int ret = 0;
383
384 if (ts78xx_fpga.supports.ts_rtc.present == 1)
385 ts78xx_ts_rtc_unload();
386 if (ts78xx_fpga.supports.ts_nand.present == 1)
387 ts78xx_ts_nand_unload();
388 if (ts78xx_fpga.supports.ts_rng.present == 1)
389 ts78xx_ts_rng_unload();
390
391 return ret;
392 }
393
394 static int ts78xx_fpga_load(void)
395 {
396 ts78xx_fpga.id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
397
398 printk(KERN_INFO "TS-78xx FPGA: magic=0x%.6x, rev=0x%.2x\n",
399 (ts78xx_fpga.id >> 8) & 0xffffff,
400 ts78xx_fpga.id & 0xff);
401
402 ts78xx_fpga_supports();
403
404 if (ts78xx_fpga_load_devices()) {
405 ts78xx_fpga.state = -1;
406 return -EBUSY;
407 }
408
409 return 0;
410 };
411
412 static int ts78xx_fpga_unload(void)
413 {
414 unsigned int fpga_id;
415
416 fpga_id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
417
418 /*
419 * There does not seem to be a feasible way to block access to the GPIO
420 * pins from userspace (/dev/mem). This if clause should hopefully warn
421 * those foolish enough not to follow 'policy' :)
422 *
423 * UrJTAG SVN since r1381 can be used to reprogram the FPGA
424 */
425 if (ts78xx_fpga.id != fpga_id) {
426 printk(KERN_ERR "TS-78xx FPGA: magic/rev mismatch\n"
427 "TS-78xx FPGA: was 0x%.6x/%.2x but now 0x%.6x/%.2x\n",
428 (ts78xx_fpga.id >> 8) & 0xffffff, ts78xx_fpga.id & 0xff,
429 (fpga_id >> 8) & 0xffffff, fpga_id & 0xff);
430 ts78xx_fpga.state = -1;
431 return -EBUSY;
432 }
433
434 if (ts78xx_fpga_unload_devices()) {
435 ts78xx_fpga.state = -1;
436 return -EBUSY;
437 }
438
439 return 0;
440 };
441
442 static ssize_t ts78xx_fpga_show(struct kobject *kobj,
443 struct kobj_attribute *attr, char *buf)
444 {
445 if (ts78xx_fpga.state < 0)
446 return sprintf(buf, "borked\n");
447
448 return sprintf(buf, "%s\n", (ts78xx_fpga.state) ? "online" : "offline");
449 }
450
451 static ssize_t ts78xx_fpga_store(struct kobject *kobj,
452 struct kobj_attribute *attr, const char *buf, size_t n)
453 {
454 int value, ret;
455
456 if (ts78xx_fpga.state < 0) {
457 printk(KERN_ERR "TS-78xx FPGA: borked, you must powercycle asap\n");
458 return -EBUSY;
459 }
460
461 if (strncmp(buf, "online", sizeof("online") - 1) == 0)
462 value = 1;
463 else if (strncmp(buf, "offline", sizeof("offline") - 1) == 0)
464 value = 0;
465 else {
466 printk(KERN_ERR "ts78xx_fpga_store: Invalid value\n");
467 return -EINVAL;
468 }
469
470 if (ts78xx_fpga.state == value)
471 return n;
472
473 ret = (ts78xx_fpga.state == 0)
474 ? ts78xx_fpga_load()
475 : ts78xx_fpga_unload();
476
477 if (!(ret < 0))
478 ts78xx_fpga.state = value;
479
480 return n;
481 }
482
483 static struct kobj_attribute ts78xx_fpga_attr =
484 __ATTR(ts78xx_fpga, 0644, ts78xx_fpga_show, ts78xx_fpga_store);
485
486 /*****************************************************************************
487 * General Setup
488 ****************************************************************************/
489 static struct orion5x_mpp_mode ts78xx_mpp_modes[] __initdata = {
490 { 0, MPP_UNUSED },
491 { 1, MPP_GPIO }, /* JTAG Clock */
492 { 2, MPP_GPIO }, /* JTAG Data In */
493 { 3, MPP_GPIO }, /* Lat ECP2 256 FPGA - PB2B */
494 { 4, MPP_GPIO }, /* JTAG Data Out */
495 { 5, MPP_GPIO }, /* JTAG TMS */
496 { 6, MPP_GPIO }, /* Lat ECP2 256 FPGA - PB31A_CLK4+ */
497 { 7, MPP_GPIO }, /* Lat ECP2 256 FPGA - PB22B */
498 { 8, MPP_UNUSED },
499 { 9, MPP_UNUSED },
500 { 10, MPP_UNUSED },
501 { 11, MPP_UNUSED },
502 { 12, MPP_UNUSED },
503 { 13, MPP_UNUSED },
504 { 14, MPP_UNUSED },
505 { 15, MPP_UNUSED },
506 { 16, MPP_UART },
507 { 17, MPP_UART },
508 { 18, MPP_UART },
509 { 19, MPP_UART },
510 /*
511 * MPP[20] PCI Clock Out 1
512 * MPP[21] PCI Clock Out 0
513 * MPP[22] Unused
514 * MPP[23] Unused
515 * MPP[24] Unused
516 * MPP[25] Unused
517 */
518 { -1 },
519 };
520
521 static void __init ts78xx_init(void)
522 {
523 int ret;
524
525 /*
526 * Setup basic Orion functions. Need to be called early.
527 */
528 orion5x_init();
529
530 orion5x_mpp_conf(ts78xx_mpp_modes);
531
532 /*
533 * Configure peripherals.
534 */
535 orion5x_ehci0_init();
536 orion5x_ehci1_init();
537 orion5x_eth_init(&ts78xx_eth_data);
538 orion5x_sata_init(&ts78xx_sata_data);
539 orion5x_uart0_init();
540 orion5x_uart1_init();
541 orion5x_xor_init();
542
543 /* FPGA init */
544 ts78xx_fpga_devices_zero_init();
545 ret = ts78xx_fpga_load();
546 ret = sysfs_create_file(power_kobj, &ts78xx_fpga_attr.attr);
547 if (ret)
548 printk(KERN_ERR "sysfs_create_file failed: %d\n", ret);
549 }
550
551 MACHINE_START(TS78XX, "Technologic Systems TS-78xx SBC")
552 /* Maintainer: Alexander Clouter <alex@digriz.org.uk> */
553 .boot_params = 0x00000100,
554 .init_machine = ts78xx_init,
555 .map_io = ts78xx_map_io,
556 .init_irq = orion5x_init_irq,
557 .timer = &orion5x_timer,
558 MACHINE_END
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