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authorTony Lindgren <tony@atomide.com>2006-04-02 12:46:25 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-04-02 12:46:25 -0400
commit670c104ae8e7bcc28be0289a16dac2ddfb88b285 (patch)
tree1c55f3a466775fd1d3b73ca28947500221e47134 /arch
parent6e60e79a1d46eaa3369febc2f6c31e0acfaaae3f (diff)
[ARM] 3430/1: ARM: OMAP: 5/8 Update PM
Patch from Tony Lindgren Update OMAP PM code from linux-omap tree: - Move PM code from plat-omap to mach-omap1 and mach-omap2 by Tony Lindgren - Add minimal PM support for omap24xx by Tony Lindgren and Richard Woodruff - Misc updates to omap1 PM code by Tuukka Tikkanen et al - Updates to the SRAM code needed for PM and FB by Imre Deak Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-omap1/pm.c770
-rw-r--r--arch/arm/mach-omap1/sleep.S (renamed from arch/arm/plat-omap/sleep.S)111
-rw-r--r--arch/arm/mach-omap2/pm.c149
-rw-r--r--arch/arm/mach-omap2/sleep.S144
-rw-r--r--arch/arm/mach-omap2/sram-fn.S4
-rw-r--r--arch/arm/plat-omap/pm.c1
-rw-r--r--arch/arm/plat-omap/sram.c143
7 files changed, 1279 insertions, 43 deletions
diff --git a/arch/arm/mach-omap1/pm.c b/arch/arm/mach-omap1/pm.c
new file mode 100644
index 000000000000..ddf6b07dc9c7
--- /dev/null
+++ b/arch/arm/mach-omap1/pm.c
@@ -0,0 +1,770 @@
1/*
2 * linux/arch/arm/mach-omap1/pm.c
3 *
4 * OMAP Power Management Routines
5 *
6 * Original code for the SA11x0:
7 * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com>
8 *
9 * Modified for the PXA250 by Nicolas Pitre:
10 * Copyright (c) 2002 Monta Vista Software, Inc.
11 *
12 * Modified for the OMAP1510 by David Singleton:
13 * Copyright (c) 2002 Monta Vista Software, Inc.
14 *
15 * Cleanup 2004 for OMAP1510/1610 by Dirk Behme <dirk.behme@de.bosch.com>
16 *
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License as published by the
19 * Free Software Foundation; either version 2 of the License, or (at your
20 * option) any later version.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 * You should have received a copy of the GNU General Public License along
34 * with this program; if not, write to the Free Software Foundation, Inc.,
35 * 675 Mass Ave, Cambridge, MA 02139, USA.
36 */
37
38#include <linux/pm.h>
39#include <linux/sched.h>
40#include <linux/proc_fs.h>
41#include <linux/pm.h>
42#include <linux/interrupt.h>
43#include <linux/sysfs.h>
44#include <linux/module.h>
45
46#include <asm/io.h>
47#include <asm/irq.h>
48#include <asm/atomic.h>
49#include <asm/mach/time.h>
50#include <asm/mach/irq.h>
51#include <asm/mach-types.h>
52
53#include <asm/arch/irqs.h>
54#include <asm/arch/clock.h>
55#include <asm/arch/sram.h>
56#include <asm/arch/tc.h>
57#include <asm/arch/pm.h>
58#include <asm/arch/mux.h>
59#include <asm/arch/tps65010.h>
60#include <asm/arch/dma.h>
61#include <asm/arch/dsp_common.h>
62#include <asm/arch/dmtimer.h>
63
64static unsigned int arm_sleep_save[ARM_SLEEP_SAVE_SIZE];
65static unsigned short dsp_sleep_save[DSP_SLEEP_SAVE_SIZE];
66static unsigned short ulpd_sleep_save[ULPD_SLEEP_SAVE_SIZE];
67static unsigned int mpui730_sleep_save[MPUI730_SLEEP_SAVE_SIZE];
68static unsigned int mpui1510_sleep_save[MPUI1510_SLEEP_SAVE_SIZE];
69static unsigned int mpui1610_sleep_save[MPUI1610_SLEEP_SAVE_SIZE];
70
71static unsigned short enable_dyn_sleep = 1;
72
73static ssize_t omap_pm_sleep_while_idle_show(struct subsystem * subsys, char *buf)
74{
75 return sprintf(buf, "%hu\n", enable_dyn_sleep);
76}
77
78static ssize_t omap_pm_sleep_while_idle_store(struct subsystem * subsys,
79 const char * buf,
80 size_t n)
81{
82 unsigned short value;
83 if (sscanf(buf, "%hu", &value) != 1 ||
84 (value != 0 && value != 1)) {
85 printk(KERN_ERR "idle_sleep_store: Invalid value\n");
86 return -EINVAL;
87 }
88 enable_dyn_sleep = value;
89 return n;
90}
91
92static struct subsys_attribute sleep_while_idle_attr = {
93 .attr = {
94 .name = __stringify(sleep_while_idle),
95 .mode = 0644,
96 },
97 .show = omap_pm_sleep_while_idle_show,
98 .store = omap_pm_sleep_while_idle_store,
99};
100
101extern struct subsystem power_subsys;
102static void (*omap_sram_idle)(void) = NULL;
103static void (*omap_sram_suspend)(unsigned long r0, unsigned long r1) = NULL;
104
105/*
106 * Let's power down on idle, but only if we are really
107 * idle, because once we start down the path of
108 * going idle we continue to do idle even if we get
109 * a clock tick interrupt . .
110 */
111void omap_pm_idle(void)
112{
113 extern __u32 arm_idlect1_mask;
114 __u32 use_idlect1 = arm_idlect1_mask;
115#ifndef CONFIG_OMAP_MPU_TIMER
116 int do_sleep;
117#endif
118
119 local_irq_disable();
120 local_fiq_disable();
121 if (need_resched()) {
122 local_fiq_enable();
123 local_irq_enable();
124 return;
125 }
126
127 /*
128 * Since an interrupt may set up a timer, we don't want to
129 * reprogram the hardware timer with interrupts enabled.
130 * Re-enable interrupts only after returning from idle.
131 */
132 timer_dyn_reprogram();
133
134#ifdef CONFIG_OMAP_MPU_TIMER
135#warning Enable 32kHz OS timer in order to allow sleep states in idle
136 use_idlect1 = use_idlect1 & ~(1 << 9);
137#else
138
139 do_sleep = 0;
140 while (enable_dyn_sleep) {
141
142#ifdef CONFIG_CBUS_TAHVO_USB
143 extern int vbus_active;
144 /* Clock requirements? */
145 if (vbus_active)
146 break;
147#endif
148 do_sleep = 1;
149 break;
150 }
151
152#ifdef CONFIG_OMAP_DM_TIMER
153 use_idlect1 = omap_dm_timer_modify_idlect_mask(use_idlect1);
154#endif
155
156 if (omap_dma_running()) {
157 use_idlect1 &= ~(1 << 6);
158 if (omap_lcd_dma_ext_running())
159 use_idlect1 &= ~(1 << 12);
160 }
161
162 /* We should be able to remove the do_sleep variable and multiple
163 * tests above as soon as drivers, timer and DMA code have been fixed.
164 * Even the sleep block count should become obsolete. */
165 if ((use_idlect1 != ~0) || !do_sleep) {
166
167 __u32 saved_idlect1 = omap_readl(ARM_IDLECT1);
168 if (cpu_is_omap15xx())
169 use_idlect1 &= OMAP1510_BIG_SLEEP_REQUEST;
170 else
171 use_idlect1 &= OMAP1610_IDLECT1_SLEEP_VAL;
172 omap_writel(use_idlect1, ARM_IDLECT1);
173 __asm__ volatile ("mcr p15, 0, r0, c7, c0, 4");
174 omap_writel(saved_idlect1, ARM_IDLECT1);
175
176 local_fiq_enable();
177 local_irq_enable();
178 return;
179 }
180 omap_sram_suspend(omap_readl(ARM_IDLECT1),
181 omap_readl(ARM_IDLECT2));
182#endif
183
184 local_fiq_enable();
185 local_irq_enable();
186}
187
188/*
189 * Configuration of the wakeup event is board specific. For the
190 * moment we put it into this helper function. Later it may move
191 * to board specific files.
192 */
193static void omap_pm_wakeup_setup(void)
194{
195 u32 level1_wake = 0;
196 u32 level2_wake = OMAP_IRQ_BIT(INT_UART2);
197
198 /*
199 * Turn off all interrupts except GPIO bank 1, L1-2nd level cascade,
200 * and the L2 wakeup interrupts: keypad and UART2. Note that the
201 * drivers must still separately call omap_set_gpio_wakeup() to
202 * wake up to a GPIO interrupt.
203 */
204 if (cpu_is_omap730())
205 level1_wake = OMAP_IRQ_BIT(INT_730_GPIO_BANK1) |
206 OMAP_IRQ_BIT(INT_730_IH2_IRQ);
207 else if (cpu_is_omap15xx())
208 level1_wake = OMAP_IRQ_BIT(INT_GPIO_BANK1) |
209 OMAP_IRQ_BIT(INT_1510_IH2_IRQ);
210 else if (cpu_is_omap16xx())
211 level1_wake = OMAP_IRQ_BIT(INT_GPIO_BANK1) |
212 OMAP_IRQ_BIT(INT_1610_IH2_IRQ);
213
214 omap_writel(~level1_wake, OMAP_IH1_MIR);
215
216 if (cpu_is_omap730()) {
217 omap_writel(~level2_wake, OMAP_IH2_0_MIR);
218 omap_writel(~(OMAP_IRQ_BIT(INT_730_WAKE_UP_REQ) |
219 OMAP_IRQ_BIT(INT_730_MPUIO_KEYPAD)),
220 OMAP_IH2_1_MIR);
221 } else if (cpu_is_omap15xx()) {
222 level2_wake |= OMAP_IRQ_BIT(INT_KEYBOARD);
223 omap_writel(~level2_wake, OMAP_IH2_MIR);
224 } else if (cpu_is_omap16xx()) {
225 level2_wake |= OMAP_IRQ_BIT(INT_KEYBOARD);
226 omap_writel(~level2_wake, OMAP_IH2_0_MIR);
227
228 /* INT_1610_WAKE_UP_REQ is needed for GPIO wakeup... */
229 omap_writel(~OMAP_IRQ_BIT(INT_1610_WAKE_UP_REQ),
230 OMAP_IH2_1_MIR);
231 omap_writel(~0x0, OMAP_IH2_2_MIR);
232 omap_writel(~0x0, OMAP_IH2_3_MIR);
233 }
234
235 /* New IRQ agreement, recalculate in cascade order */
236 omap_writel(1, OMAP_IH2_CONTROL);
237 omap_writel(1, OMAP_IH1_CONTROL);
238}
239
240#define EN_DSPCK 13 /* ARM_CKCTL */
241#define EN_APICK 6 /* ARM_IDLECT2 */
242#define DSP_EN 1 /* ARM_RSTCT1 */
243
244void omap_pm_suspend(void)
245{
246 unsigned long arg0 = 0, arg1 = 0;
247
248 printk("PM: OMAP%x is trying to enter deep sleep...\n", system_rev);
249
250 omap_serial_wake_trigger(1);
251
252 if (machine_is_omap_osk()) {
253 /* Stop LED1 (D9) blink */
254 tps65010_set_led(LED1, OFF);
255 }
256
257 omap_writew(0xffff, ULPD_SOFT_DISABLE_REQ_REG);
258
259 /*
260 * Step 1: turn off interrupts (FIXME: NOTE: already disabled)
261 */
262
263 local_irq_disable();
264 local_fiq_disable();
265
266 /*
267 * Step 2: save registers
268 *
269 * The omap is a strange/beautiful device. The caches, memory
270 * and register state are preserved across power saves.
271 * We have to save and restore very little register state to
272 * idle the omap.
273 *
274 * Save interrupt, MPUI, ARM and UPLD control registers.
275 */
276
277 if (cpu_is_omap730()) {
278 MPUI730_SAVE(OMAP_IH1_MIR);
279 MPUI730_SAVE(OMAP_IH2_0_MIR);
280 MPUI730_SAVE(OMAP_IH2_1_MIR);
281 MPUI730_SAVE(MPUI_CTRL);
282 MPUI730_SAVE(MPUI_DSP_BOOT_CONFIG);
283 MPUI730_SAVE(MPUI_DSP_API_CONFIG);
284 MPUI730_SAVE(EMIFS_CONFIG);
285 MPUI730_SAVE(EMIFF_SDRAM_CONFIG);
286
287 } else if (cpu_is_omap15xx()) {
288 MPUI1510_SAVE(OMAP_IH1_MIR);
289 MPUI1510_SAVE(OMAP_IH2_MIR);
290 MPUI1510_SAVE(MPUI_CTRL);
291 MPUI1510_SAVE(MPUI_DSP_BOOT_CONFIG);
292 MPUI1510_SAVE(MPUI_DSP_API_CONFIG);
293 MPUI1510_SAVE(EMIFS_CONFIG);
294 MPUI1510_SAVE(EMIFF_SDRAM_CONFIG);
295 } else if (cpu_is_omap16xx()) {
296 MPUI1610_SAVE(OMAP_IH1_MIR);
297 MPUI1610_SAVE(OMAP_IH2_0_MIR);
298 MPUI1610_SAVE(OMAP_IH2_1_MIR);
299 MPUI1610_SAVE(OMAP_IH2_2_MIR);
300 MPUI1610_SAVE(OMAP_IH2_3_MIR);
301 MPUI1610_SAVE(MPUI_CTRL);
302 MPUI1610_SAVE(MPUI_DSP_BOOT_CONFIG);
303 MPUI1610_SAVE(MPUI_DSP_API_CONFIG);
304 MPUI1610_SAVE(EMIFS_CONFIG);
305 MPUI1610_SAVE(EMIFF_SDRAM_CONFIG);
306 }
307
308 ARM_SAVE(ARM_CKCTL);
309 ARM_SAVE(ARM_IDLECT1);
310 ARM_SAVE(ARM_IDLECT2);
311 if (!(cpu_is_omap15xx()))
312 ARM_SAVE(ARM_IDLECT3);
313 ARM_SAVE(ARM_EWUPCT);
314 ARM_SAVE(ARM_RSTCT1);
315 ARM_SAVE(ARM_RSTCT2);
316 ARM_SAVE(ARM_SYSST);
317 ULPD_SAVE(ULPD_CLOCK_CTRL);
318 ULPD_SAVE(ULPD_STATUS_REQ);
319
320 /* (Step 3 removed - we now allow deep sleep by default) */
321
322 /*
323 * Step 4: OMAP DSP Shutdown
324 */
325
326 /* stop DSP */
327 omap_writew(omap_readw(ARM_RSTCT1) & ~(1 << DSP_EN), ARM_RSTCT1);
328
329 /* shut down dsp_ck */
330 omap_writew(omap_readw(ARM_CKCTL) & ~(1 << EN_DSPCK), ARM_CKCTL);
331
332 /* temporarily enabling api_ck to access DSP registers */
333 omap_writew(omap_readw(ARM_IDLECT2) | 1 << EN_APICK, ARM_IDLECT2);
334
335 /* save DSP registers */
336 DSP_SAVE(DSP_IDLECT2);
337
338 /* Stop all DSP domain clocks */
339 __raw_writew(0, DSP_IDLECT2);
340
341 /*
342 * Step 5: Wakeup Event Setup
343 */
344
345 omap_pm_wakeup_setup();
346
347 /*
348 * Step 6: ARM and Traffic controller shutdown
349 */
350
351 /* disable ARM watchdog */
352 omap_writel(0x00F5, OMAP_WDT_TIMER_MODE);
353 omap_writel(0x00A0, OMAP_WDT_TIMER_MODE);
354
355 /*
356 * Step 6b: ARM and Traffic controller shutdown
357 *
358 * Step 6 continues here. Prepare jump to power management
359 * assembly code in internal SRAM.
360 *
361 * Since the omap_cpu_suspend routine has been copied to
362 * SRAM, we'll do an indirect procedure call to it and pass the
363 * contents of arm_idlect1 and arm_idlect2 so it can restore
364 * them when it wakes up and it will return.
365 */
366
367 arg0 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT1];
368 arg1 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT2];
369
370 /*
371 * Step 6c: ARM and Traffic controller shutdown
372 *
373 * Jump to assembly code. The processor will stay there
374 * until wake up.
375 */
376 omap_sram_suspend(arg0, arg1);
377
378 /*
379 * If we are here, processor is woken up!
380 */
381
382 /*
383 * Restore DSP clocks
384 */
385
386 /* again temporarily enabling api_ck to access DSP registers */
387 omap_writew(omap_readw(ARM_IDLECT2) | 1 << EN_APICK, ARM_IDLECT2);
388
389 /* Restore DSP domain clocks */
390 DSP_RESTORE(DSP_IDLECT2);
391
392 /*
393 * Restore ARM state, except ARM_IDLECT1/2 which omap_cpu_suspend did
394 */
395
396 if (!(cpu_is_omap15xx()))
397 ARM_RESTORE(ARM_IDLECT3);
398 ARM_RESTORE(ARM_CKCTL);
399 ARM_RESTORE(ARM_EWUPCT);
400 ARM_RESTORE(ARM_RSTCT1);
401 ARM_RESTORE(ARM_RSTCT2);
402 ARM_RESTORE(ARM_SYSST);
403 ULPD_RESTORE(ULPD_CLOCK_CTRL);
404 ULPD_RESTORE(ULPD_STATUS_REQ);
405
406 if (cpu_is_omap730()) {
407 MPUI730_RESTORE(EMIFS_CONFIG);
408 MPUI730_RESTORE(EMIFF_SDRAM_CONFIG);
409 MPUI730_RESTORE(OMAP_IH1_MIR);
410 MPUI730_RESTORE(OMAP_IH2_0_MIR);
411 MPUI730_RESTORE(OMAP_IH2_1_MIR);
412 } else if (cpu_is_omap15xx()) {
413 MPUI1510_RESTORE(MPUI_CTRL);
414 MPUI1510_RESTORE(MPUI_DSP_BOOT_CONFIG);
415 MPUI1510_RESTORE(MPUI_DSP_API_CONFIG);
416 MPUI1510_RESTORE(EMIFS_CONFIG);
417 MPUI1510_RESTORE(EMIFF_SDRAM_CONFIG);
418 MPUI1510_RESTORE(OMAP_IH1_MIR);
419 MPUI1510_RESTORE(OMAP_IH2_MIR);
420 } else if (cpu_is_omap16xx()) {
421 MPUI1610_RESTORE(MPUI_CTRL);
422 MPUI1610_RESTORE(MPUI_DSP_BOOT_CONFIG);
423 MPUI1610_RESTORE(MPUI_DSP_API_CONFIG);
424 MPUI1610_RESTORE(EMIFS_CONFIG);
425 MPUI1610_RESTORE(EMIFF_SDRAM_CONFIG);
426
427 MPUI1610_RESTORE(OMAP_IH1_MIR);
428 MPUI1610_RESTORE(OMAP_IH2_0_MIR);
429 MPUI1610_RESTORE(OMAP_IH2_1_MIR);
430 MPUI1610_RESTORE(OMAP_IH2_2_MIR);
431 MPUI1610_RESTORE(OMAP_IH2_3_MIR);
432 }
433
434 omap_writew(0, ULPD_SOFT_DISABLE_REQ_REG);
435
436 /*
437 * Reenable interrupts
438 */
439
440 local_irq_enable();
441 local_fiq_enable();
442
443 omap_serial_wake_trigger(0);
444
445 printk("PM: OMAP%x is re-starting from deep sleep...\n", system_rev);
446
447 if (machine_is_omap_osk()) {
448 /* Let LED1 (D9) blink again */
449 tps65010_set_led(LED1, BLINK);
450 }
451}
452
453#if defined(DEBUG) && defined(CONFIG_PROC_FS)
454static int g_read_completed;
455
456/*
457 * Read system PM registers for debugging
458 */
459static int omap_pm_read_proc(
460 char *page_buffer,
461 char **my_first_byte,
462 off_t virtual_start,
463 int length,
464 int *eof,
465 void *data)
466{
467 int my_buffer_offset = 0;
468 char * const my_base = page_buffer;
469
470 ARM_SAVE(ARM_CKCTL);
471 ARM_SAVE(ARM_IDLECT1);
472 ARM_SAVE(ARM_IDLECT2);
473 if (!(cpu_is_omap15xx()))
474 ARM_SAVE(ARM_IDLECT3);
475 ARM_SAVE(ARM_EWUPCT);
476 ARM_SAVE(ARM_RSTCT1);
477 ARM_SAVE(ARM_RSTCT2);
478 ARM_SAVE(ARM_SYSST);
479
480 ULPD_SAVE(ULPD_IT_STATUS);
481 ULPD_SAVE(ULPD_CLOCK_CTRL);
482 ULPD_SAVE(ULPD_SOFT_REQ);
483 ULPD_SAVE(ULPD_STATUS_REQ);
484 ULPD_SAVE(ULPD_DPLL_CTRL);
485 ULPD_SAVE(ULPD_POWER_CTRL);
486
487 if (cpu_is_omap730()) {
488 MPUI730_SAVE(MPUI_CTRL);
489 MPUI730_SAVE(MPUI_DSP_STATUS);
490 MPUI730_SAVE(MPUI_DSP_BOOT_CONFIG);
491 MPUI730_SAVE(MPUI_DSP_API_CONFIG);
492 MPUI730_SAVE(EMIFF_SDRAM_CONFIG);
493 MPUI730_SAVE(EMIFS_CONFIG);
494 } else if (cpu_is_omap15xx()) {
495 MPUI1510_SAVE(MPUI_CTRL);
496 MPUI1510_SAVE(MPUI_DSP_STATUS);
497 MPUI1510_SAVE(MPUI_DSP_BOOT_CONFIG);
498 MPUI1510_SAVE(MPUI_DSP_API_CONFIG);
499 MPUI1510_SAVE(EMIFF_SDRAM_CONFIG);
500 MPUI1510_SAVE(EMIFS_CONFIG);
501 } else if (cpu_is_omap16xx()) {
502 MPUI1610_SAVE(MPUI_CTRL);
503 MPUI1610_SAVE(MPUI_DSP_STATUS);
504 MPUI1610_SAVE(MPUI_DSP_BOOT_CONFIG);
505 MPUI1610_SAVE(MPUI_DSP_API_CONFIG);
506 MPUI1610_SAVE(EMIFF_SDRAM_CONFIG);
507 MPUI1610_SAVE(EMIFS_CONFIG);
508 }
509
510 if (virtual_start == 0) {
511 g_read_completed = 0;
512
513 my_buffer_offset += sprintf(my_base + my_buffer_offset,
514 "ARM_CKCTL_REG: 0x%-8x \n"
515 "ARM_IDLECT1_REG: 0x%-8x \n"
516 "ARM_IDLECT2_REG: 0x%-8x \n"
517 "ARM_IDLECT3_REG: 0x%-8x \n"
518 "ARM_EWUPCT_REG: 0x%-8x \n"
519 "ARM_RSTCT1_REG: 0x%-8x \n"
520 "ARM_RSTCT2_REG: 0x%-8x \n"
521 "ARM_SYSST_REG: 0x%-8x \n"
522 "ULPD_IT_STATUS_REG: 0x%-4x \n"
523 "ULPD_CLOCK_CTRL_REG: 0x%-4x \n"
524 "ULPD_SOFT_REQ_REG: 0x%-4x \n"
525 "ULPD_DPLL_CTRL_REG: 0x%-4x \n"
526 "ULPD_STATUS_REQ_REG: 0x%-4x \n"
527 "ULPD_POWER_CTRL_REG: 0x%-4x \n",
528 ARM_SHOW(ARM_CKCTL),
529 ARM_SHOW(ARM_IDLECT1),
530 ARM_SHOW(ARM_IDLECT2),
531 ARM_SHOW(ARM_IDLECT3),
532 ARM_SHOW(ARM_EWUPCT),
533 ARM_SHOW(ARM_RSTCT1),
534 ARM_SHOW(ARM_RSTCT2),
535 ARM_SHOW(ARM_SYSST),
536 ULPD_SHOW(ULPD_IT_STATUS),
537 ULPD_SHOW(ULPD_CLOCK_CTRL),
538 ULPD_SHOW(ULPD_SOFT_REQ),
539 ULPD_SHOW(ULPD_DPLL_CTRL),
540 ULPD_SHOW(ULPD_STATUS_REQ),
541 ULPD_SHOW(ULPD_POWER_CTRL));
542
543 if (cpu_is_omap730()) {
544 my_buffer_offset += sprintf(my_base + my_buffer_offset,
545 "MPUI730_CTRL_REG 0x%-8x \n"
546 "MPUI730_DSP_STATUS_REG: 0x%-8x \n"
547 "MPUI730_DSP_BOOT_CONFIG_REG: 0x%-8x \n"
548 "MPUI730_DSP_API_CONFIG_REG: 0x%-8x \n"
549 "MPUI730_SDRAM_CONFIG_REG: 0x%-8x \n"
550 "MPUI730_EMIFS_CONFIG_REG: 0x%-8x \n",
551 MPUI730_SHOW(MPUI_CTRL),
552 MPUI730_SHOW(MPUI_DSP_STATUS),
553 MPUI730_SHOW(MPUI_DSP_BOOT_CONFIG),
554 MPUI730_SHOW(MPUI_DSP_API_CONFIG),
555 MPUI730_SHOW(EMIFF_SDRAM_CONFIG),
556 MPUI730_SHOW(EMIFS_CONFIG));
557 } else if (cpu_is_omap15xx()) {
558 my_buffer_offset += sprintf(my_base + my_buffer_offset,
559 "MPUI1510_CTRL_REG 0x%-8x \n"
560 "MPUI1510_DSP_STATUS_REG: 0x%-8x \n"
561 "MPUI1510_DSP_BOOT_CONFIG_REG: 0x%-8x \n"
562 "MPUI1510_DSP_API_CONFIG_REG: 0x%-8x \n"
563 "MPUI1510_SDRAM_CONFIG_REG: 0x%-8x \n"
564 "MPUI1510_EMIFS_CONFIG_REG: 0x%-8x \n",
565 MPUI1510_SHOW(MPUI_CTRL),
566 MPUI1510_SHOW(MPUI_DSP_STATUS),
567 MPUI1510_SHOW(MPUI_DSP_BOOT_CONFIG),
568 MPUI1510_SHOW(MPUI_DSP_API_CONFIG),
569 MPUI1510_SHOW(EMIFF_SDRAM_CONFIG),
570 MPUI1510_SHOW(EMIFS_CONFIG));
571 } else if (cpu_is_omap16xx()) {
572 my_buffer_offset += sprintf(my_base + my_buffer_offset,
573 "MPUI1610_CTRL_REG 0x%-8x \n"
574 "MPUI1610_DSP_STATUS_REG: 0x%-8x \n"
575 "MPUI1610_DSP_BOOT_CONFIG_REG: 0x%-8x \n"
576 "MPUI1610_DSP_API_CONFIG_REG: 0x%-8x \n"
577 "MPUI1610_SDRAM_CONFIG_REG: 0x%-8x \n"
578 "MPUI1610_EMIFS_CONFIG_REG: 0x%-8x \n",
579 MPUI1610_SHOW(MPUI_CTRL),
580 MPUI1610_SHOW(MPUI_DSP_STATUS),
581 MPUI1610_SHOW(MPUI_DSP_BOOT_CONFIG),
582 MPUI1610_SHOW(MPUI_DSP_API_CONFIG),
583 MPUI1610_SHOW(EMIFF_SDRAM_CONFIG),
584 MPUI1610_SHOW(EMIFS_CONFIG));
585 }
586
587 g_read_completed++;
588 } else if (g_read_completed >= 1) {
589 *eof = 1;
590 return 0;
591 }
592 g_read_completed++;
593
594 *my_first_byte = page_buffer;
595 return my_buffer_offset;
596}
597
598static void omap_pm_init_proc(void)
599{
600 struct proc_dir_entry *entry;
601
602 entry = create_proc_read_entry("driver/omap_pm",
603 S_IWUSR | S_IRUGO, NULL,
604 omap_pm_read_proc, NULL);
605}
606
607#endif /* DEBUG && CONFIG_PROC_FS */
608
609static void (*saved_idle)(void) = NULL;
610
611/*
612 * omap_pm_prepare - Do preliminary suspend work.
613 * @state: suspend state we're entering.
614 *
615 */
616static int omap_pm_prepare(suspend_state_t state)
617{
618 int error = 0;
619
620 /* We cannot sleep in idle until we have resumed */
621 saved_idle = pm_idle;
622 pm_idle = NULL;
623
624 switch (state)
625 {
626 case PM_SUSPEND_STANDBY:
627 case PM_SUSPEND_MEM:
628 break;
629
630 case PM_SUSPEND_DISK:
631 return -ENOTSUPP;
632
633 default:
634 return -EINVAL;
635 }
636
637 return error;
638}
639
640
641/*
642 * omap_pm_enter - Actually enter a sleep state.
643 * @state: State we're entering.
644 *
645 */
646
647static int omap_pm_enter(suspend_state_t state)
648{
649 switch (state)
650 {
651 case PM_SUSPEND_STANDBY:
652 case PM_SUSPEND_MEM:
653 omap_pm_suspend();
654 break;
655
656 case PM_SUSPEND_DISK:
657 return -ENOTSUPP;
658
659 default:
660 return -EINVAL;
661 }
662
663 return 0;
664}
665
666
667/**
668 * omap_pm_finish - Finish up suspend sequence.
669 * @state: State we're coming out of.
670 *
671 * This is called after we wake back up (or if entering the sleep state
672 * failed).
673 */
674
675static int omap_pm_finish(suspend_state_t state)
676{
677 pm_idle = saved_idle;
678 return 0;
679}
680
681
682static irqreturn_t omap_wakeup_interrupt(int irq, void * dev,
683 struct pt_regs * regs)
684{
685 return IRQ_HANDLED;
686}
687
688static struct irqaction omap_wakeup_irq = {
689 .name = "peripheral wakeup",
690 .flags = SA_INTERRUPT,
691 .handler = omap_wakeup_interrupt
692};
693
694
695
696static struct pm_ops omap_pm_ops ={
697 .pm_disk_mode = 0,
698 .prepare = omap_pm_prepare,
699 .enter = omap_pm_enter,
700 .finish = omap_pm_finish,
701};
702
703static int __init omap_pm_init(void)
704{
705 printk("Power Management for TI OMAP.\n");
706
707 /*
708 * We copy the assembler sleep/wakeup routines to SRAM.
709 * These routines need to be in SRAM as that's the only
710 * memory the MPU can see when it wakes up.
711 */
712 if (cpu_is_omap730()) {
713 omap_sram_idle = omap_sram_push(omap730_idle_loop_suspend,
714 omap730_idle_loop_suspend_sz);
715 omap_sram_suspend = omap_sram_push(omap730_cpu_suspend,
716 omap730_cpu_suspend_sz);
717 } else if (cpu_is_omap15xx()) {
718 omap_sram_idle = omap_sram_push(omap1510_idle_loop_suspend,
719 omap1510_idle_loop_suspend_sz);
720 omap_sram_suspend = omap_sram_push(omap1510_cpu_suspend,
721 omap1510_cpu_suspend_sz);
722 } else if (cpu_is_omap16xx()) {
723 omap_sram_idle = omap_sram_push(omap1610_idle_loop_suspend,
724 omap1610_idle_loop_suspend_sz);
725 omap_sram_suspend = omap_sram_push(omap1610_cpu_suspend,
726 omap1610_cpu_suspend_sz);
727 }
728
729 if (omap_sram_idle == NULL || omap_sram_suspend == NULL) {
730 printk(KERN_ERR "PM not initialized: Missing SRAM support\n");
731 return -ENODEV;
732 }
733
734 pm_idle = omap_pm_idle;
735
736 if (cpu_is_omap730())
737 setup_irq(INT_730_WAKE_UP_REQ, &omap_wakeup_irq);
738 else if (cpu_is_omap16xx())
739 setup_irq(INT_1610_WAKE_UP_REQ, &omap_wakeup_irq);
740
741 /* Program new power ramp-up time
742 * (0 for most boards since we don't lower voltage when in deep sleep)
743 */
744 omap_writew(ULPD_SETUP_ANALOG_CELL_3_VAL, ULPD_SETUP_ANALOG_CELL_3);
745
746 /* Setup ULPD POWER_CTRL_REG - enter deep sleep whenever possible */
747 omap_writew(ULPD_POWER_CTRL_REG_VAL, ULPD_POWER_CTRL);
748
749 /* Configure IDLECT3 */
750 if (cpu_is_omap730())
751 omap_writel(OMAP730_IDLECT3_VAL, OMAP730_IDLECT3);
752 else if (cpu_is_omap16xx())
753 omap_writel(OMAP1610_IDLECT3_VAL, OMAP1610_IDLECT3);
754
755 pm_set_ops(&omap_pm_ops);
756
757#if defined(DEBUG) && defined(CONFIG_PROC_FS)
758 omap_pm_init_proc();
759#endif
760
761 subsys_create_file(&power_subsys, &sleep_while_idle_attr);
762
763 if (cpu_is_omap16xx()) {
764 /* configure LOW_PWR pin */
765 omap_cfg_reg(T20_1610_LOW_PWR);
766 }
767
768 return 0;
769}
770__initcall(omap_pm_init);
diff --git a/arch/arm/plat-omap/sleep.S b/arch/arm/mach-omap1/sleep.S
index 4cd7d292f854..e58295e2d3b2 100644
--- a/arch/arm/plat-omap/sleep.S
+++ b/arch/arm/mach-omap1/sleep.S
@@ -1,5 +1,5 @@
1/* 1/*
2 * linux/arch/arm/plat-omap/sleep.S 2 * linux/arch/arm/mach-omap1/sleep.S
3 * 3 *
4 * Low-level OMAP730/1510/1610 sleep/wakeUp support 4 * Low-level OMAP730/1510/1610 sleep/wakeUp support
5 * 5 *
@@ -383,60 +383,133 @@ ENTRY(omap1610_cpu_suspend)
383 mcr p15, 0, r0, c7, c10, 4 383 mcr p15, 0, r0, c7, c10, 4
384 nop 384 nop
385 385
386 @ load base address of Traffic Controller 386 @ Load base address of Traffic Controller
387 mov r6, #TCMIF_ASM_BASE & 0xff000000 387 mov r6, #TCMIF_ASM_BASE & 0xff000000
388 orr r6, r6, #TCMIF_ASM_BASE & 0x00ff0000 388 orr r6, r6, #TCMIF_ASM_BASE & 0x00ff0000
389 orr r6, r6, #TCMIF_ASM_BASE & 0x0000ff00 389 orr r6, r6, #TCMIF_ASM_BASE & 0x0000ff00
390 390
391 @ prepare to put SDRAM into self-refresh manually 391 @ Prepare to put SDRAM into self-refresh manually
392 ldr r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] 392 ldr r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
393 orr r9, r7, #SELF_REFRESH_MODE & 0xff000000 393 orr r9, r7, #SELF_REFRESH_MODE & 0xff000000
394 orr r9, r9, #SELF_REFRESH_MODE & 0x000000ff 394 orr r9, r9, #SELF_REFRESH_MODE & 0x000000ff
395 str r9, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] 395 str r9, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
396 396
397 @ prepare to put EMIFS to Sleep 397 @ Prepare to put EMIFS to Sleep
398 ldr r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] 398 ldr r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
399 orr r9, r8, #IDLE_EMIFS_REQUEST & 0xff 399 orr r9, r8, #IDLE_EMIFS_REQUEST & 0xff
400 str r9, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] 400 str r9, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
401 401
402 @ load base address of ARM_IDLECT1 and ARM_IDLECT2 402 @ Load base address of ARM_IDLECT1 and ARM_IDLECT2
403 mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000 403 mov r4, #CLKGEN_REG_ASM_BASE & 0xff000000
404 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000 404 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000
405 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00 405 orr r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00
406 406
407 @ turn off clock domains 407 @ Turn off clock domains
408 @ do not disable PERCK (0x04) 408 @ Do not disable PERCK (0x04)
409 mov r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff 409 mov r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff
410 orr r5, r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff00 410 orr r5, r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff00
411 strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] 411 strh r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
412 412
413 @ request ARM idle 413 @ Request ARM idle
414 mov r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff 414 mov r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff
415 orr r3, r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff00 415 orr r3, r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff00
416 strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] 416 strh r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
417 417
418 @ disable instruction cache
419 mrc p15, 0, r9, c1, c0, 0
420 bic r2, r9, #0x1000
421 mcr p15, 0, r2, c1, c0, 0
422 nop
423
424/* 418/*
425 * Let's wait for the next wake up event to wake us up. r0 can't be 419 * Let's wait for the next wake up event to wake us up. r0 can't be
426 * used here because r0 holds ARM_IDLECT1 420 * used here because r0 holds ARM_IDLECT1
427 */ 421 */
428 mov r2, #0 422 mov r2, #0
429 mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt 423 mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt
424
425 @ Errata (HEL3SU467, section 1.4.4) specifies nop-instructions
426 @ according to this formula:
427 @ 2 + (4*DPLL_MULT)/DPLL_DIV/ARMDIV
428 @ Max DPLL_MULT = 18
429 @ DPLL_DIV = 1
430 @ ARMDIV = 1
431 @ => 74 nop-instructions
432 nop
433 nop
434 nop
435 nop
436 nop
437 nop
438 nop
439 nop
440 nop
441 nop @10
442 nop
443 nop
444 nop
445 nop
446 nop
447 nop
448 nop
449 nop
450 nop
451 nop @20
452 nop
453 nop
454 nop
455 nop
456 nop
457 nop
458 nop
459 nop
460 nop
461 nop @30
462 nop
463 nop
464 nop
465 nop
466 nop
467 nop
468 nop
469 nop
470 nop
471 nop @40
472 nop
473 nop
474 nop
475 nop
476 nop
477 nop
478 nop
479 nop
480 nop
481 nop @50
482 nop
483 nop
484 nop
485 nop
486 nop
487 nop
488 nop
489 nop
490 nop
491 nop @60
492 nop
493 nop
494 nop
495 nop
496 nop
497 nop
498 nop
499 nop
500 nop
501 nop @70
502 nop
503 nop
504 nop
505 nop @74
430/* 506/*
431 * omap1610_cpu_suspend()'s resume point. 507 * omap1610_cpu_suspend()'s resume point.
432 * 508 *
433 * It will just start executing here, so we'll restore stuff from the 509 * It will just start executing here, so we'll restore stuff from the
434 * stack. 510 * stack.
435 */ 511 */
436 @ re-enable Icache 512 @ Restore the ARM_IDLECT1 and ARM_IDLECT2.
437 mcr p15, 0, r9, c1, c0, 0
438
439 @ reset the ARM_IDLECT1 and ARM_IDLECT2.
440 strh r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff] 513 strh r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
441 strh r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff] 514 strh r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
442 515
@@ -444,7 +517,7 @@ ENTRY(omap1610_cpu_suspend)
444 str r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff] 517 str r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
445 str r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff] 518 str r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
446 519
447 @ restore regs and return 520 @ Restore regs and return
448 ldmfd sp!, {r0 - r12, pc} 521 ldmfd sp!, {r0 - r12, pc}
449 522
450ENTRY(omap1610_cpu_suspend_sz) 523ENTRY(omap1610_cpu_suspend_sz)
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
new file mode 100644
index 000000000000..562168fa2b16
--- /dev/null
+++ b/arch/arm/mach-omap2/pm.c
@@ -0,0 +1,149 @@
1/*
2 * linux/arch/arm/mach-omap2/pm.c
3 *
4 * OMAP2 Power Management Routines
5 *
6 * Copyright (C) 2006 Nokia Corporation
7 * Tony Lindgren <tony@atomide.com>
8 *
9 * Copyright (C) 2005 Texas Instruments, Inc.
10 * Richard Woodruff <r-woodruff2@ti.com>
11 *
12 * Based on pm.c for omap1
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18
19#include <linux/pm.h>
20#include <linux/sched.h>
21#include <linux/proc_fs.h>
22#include <linux/pm.h>
23#include <linux/interrupt.h>
24#include <linux/sysfs.h>
25#include <linux/module.h>
26
27#include <asm/io.h>
28#include <asm/irq.h>
29#include <asm/atomic.h>
30#include <asm/mach/time.h>
31#include <asm/mach/irq.h>
32#include <asm/mach-types.h>
33
34#include <asm/arch/irqs.h>
35#include <asm/arch/clock.h>
36#include <asm/arch/sram.h>
37#include <asm/arch/pm.h>
38
39static struct clk *vclk;
40static void (*omap2_sram_idle)(void);
41static void (*omap2_sram_suspend)(int dllctrl, int cpu_rev);
42static void (*saved_idle)(void);
43
44void omap2_pm_idle(void)
45{
46 local_irq_disable();
47 local_fiq_disable();
48 if (need_resched()) {
49 local_fiq_enable();
50 local_irq_enable();
51 return;
52 }
53
54 /*
55 * Since an interrupt may set up a timer, we don't want to
56 * reprogram the hardware timer with interrupts enabled.
57 * Re-enable interrupts only after returning from idle.
58 */
59 timer_dyn_reprogram();
60
61 omap2_sram_idle();
62 local_fiq_enable();
63 local_irq_enable();
64}
65
66static int omap2_pm_prepare(suspend_state_t state)
67{
68 int error = 0;
69
70 /* We cannot sleep in idle until we have resumed */
71 saved_idle = pm_idle;
72 pm_idle = NULL;
73
74 switch (state)
75 {
76 case PM_SUSPEND_STANDBY:
77 case PM_SUSPEND_MEM:
78 break;
79
80 case PM_SUSPEND_DISK:
81 return -ENOTSUPP;
82
83 default:
84 return -EINVAL;
85 }
86
87 return error;
88}
89
90static int omap2_pm_enter(suspend_state_t state)
91{
92 switch (state)
93 {
94 case PM_SUSPEND_STANDBY:
95 case PM_SUSPEND_MEM:
96 /* FIXME: Add suspend */
97 break;
98
99 case PM_SUSPEND_DISK:
100 return -ENOTSUPP;
101
102 default:
103 return -EINVAL;
104 }
105
106 return 0;
107}
108
109static int omap2_pm_finish(suspend_state_t state)
110{
111 pm_idle = saved_idle;
112 return 0;
113}
114
115static struct pm_ops omap_pm_ops = {
116 .pm_disk_mode = 0,
117 .prepare = omap2_pm_prepare,
118 .enter = omap2_pm_enter,
119 .finish = omap2_pm_finish,
120};
121
122int __init omap2_pm_init(void)
123{
124 printk("Power Management for TI OMAP.\n");
125
126 vclk = clk_get(NULL, "virt_prcm_set");
127 if (IS_ERR(vclk)) {
128 printk(KERN_ERR "Could not get PM vclk\n");
129 return -ENODEV;
130 }
131
132 /*
133 * We copy the assembler sleep/wakeup routines to SRAM.
134 * These routines need to be in SRAM as that's the only
135 * memory the MPU can see when it wakes up.
136 */
137 omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend,
138 omap24xx_idle_loop_suspend_sz);
139
140 omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend,
141 omap24xx_cpu_suspend_sz);
142
143 pm_set_ops(&omap_pm_ops);
144 pm_idle = omap2_pm_idle;
145
146 return 0;
147}
148
149__initcall(omap2_pm_init);
diff --git a/arch/arm/mach-omap2/sleep.S b/arch/arm/mach-omap2/sleep.S
new file mode 100644
index 000000000000..00299cbeb911
--- /dev/null
+++ b/arch/arm/mach-omap2/sleep.S
@@ -0,0 +1,144 @@
1/*
2 * linux/arch/arm/mach-omap2/sleep.S
3 *
4 * (C) Copyright 2004
5 * Texas Instruments, <www.ti.com>
6 * Richard Woodruff <r-woodruff2@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <linux/config.h>
25#include <linux/linkage.h>
26#include <asm/assembler.h>
27#include <asm/arch/io.h>
28#include <asm/arch/pm.h>
29
30#define A_32KSYNC_CR_V IO_ADDRESS(OMAP_TIMER32K_BASE+0x10)
31#define A_PRCM_VOLTCTRL_V IO_ADDRESS(OMAP24XX_PRCM_BASE+0x50)
32#define A_PRCM_CLKCFG_CTRL_V IO_ADDRESS(OMAP24XX_PRCM_BASE+0x80)
33#define A_CM_CLKEN_PLL_V IO_ADDRESS(OMAP24XX_PRCM_BASE+0x500)
34#define A_CM_IDLEST_CKGEN_V IO_ADDRESS(OMAP24XX_PRCM_BASE+0x520)
35#define A_CM_CLKSEL1_PLL_V IO_ADDRESS(OMAP24XX_PRCM_BASE+0x540)
36#define A_CM_CLKSEL2_PLL_V IO_ADDRESS(OMAP24XX_PRCM_BASE+0x544)
37
38#define A_SDRC_DLLA_CTRL_V IO_ADDRESS(OMAP24XX_SDRC_BASE+0x60)
39#define A_SDRC_POWER_V IO_ADDRESS(OMAP24XX_SDRC_BASE+0x70)
40#define A_SDRC_RFR_CTRL_V IO_ADDRESS(OMAP24XX_SDRC_BASE+0xA4)
41#define A_SDRC0_V (0xC0000000)
42#define A_SDRC_MANUAL_V IO_ADDRESS(OMAP24XX_SDRC_BASE+0xA8)
43
44 .text
45
46/*
47 * Forces OMAP into idle state
48 *
49 * omap24xx_idle_loop_suspend() - This bit of code just executes the WFI
50 * for normal idles.
51 *
52 * Note: This code get's copied to internal SRAM at boot. When the OMAP
53 * wakes up it continues execution at the point it went to sleep.
54 */
55ENTRY(omap24xx_idle_loop_suspend)
56 stmfd sp!, {r0, lr} @ save registers on stack
57 mov r0, #0 @ clear for mcr setup
58 mcr p15, 0, r0, c7, c0, 4 @ wait for interrupt
59 ldmfd sp!, {r0, pc} @ restore regs and return
60
61ENTRY(omap24xx_idle_loop_suspend_sz)
62 .word . - omap24xx_idle_loop_suspend
63
64/*
65 * omap242x_cpu_suspend() - Forces OMAP into deep sleep state by completing
66 * SDRC shutdown then ARM shutdown. Upon wake MPU is back on so just restore
67 * SDRC.
68 *
69 * Input:
70 * R0 : DLL ctrl value pre-Sleep
71 * R1 : Processor+Revision
72 * 2420: 0x21 = 242xES1, 0x26 = 242xES2.2
73 * 2430: 0x31 = 2430ES1, 0x32 = 2430ES2
74 *
75 * The if the DPLL is going to AutoIdle. It seems like the DPLL may be back on
76 * when we get called, but the DLL probably isn't. We will wait a bit more in
77 * case the DPLL isn't quite there yet. The code will wait on DLL for DDR even
78 * if in unlocked mode.
79 *
80 * For less than 242x-ES2.2 upon wake from a sleep mode where the external
81 * oscillator was stopped, a timing bug exists where a non-stabilized 12MHz
82 * clock can pass into the PRCM can cause problems at DSP and IVA.
83 * To work around this the code will switch to the 32kHz source prior to sleep.
84 * Post sleep we will shift back to using the DPLL. Apparently,
85 * CM_IDLEST_CLKGEN does not reflect the full clock change so you need to wait
86 * 3x12MHz + 3x32kHz clocks for a full switch.
87 *
88 * The DLL load value is not kept in RETENTION or OFF. It needs to be restored
89 * at wake
90 */
91ENTRY(omap24xx_cpu_suspend)
92 stmfd sp!, {r0 - r12, lr} @ save registers on stack
93 mov r3, #0x0 @ clear for mrc call
94 mcr p15, 0, r3, c7, c10, 4 @ memory barrier, hope SDR/DDR finished
95 nop
96 nop
97 ldr r3, A_SDRC_POWER @ addr of sdrc power
98 ldr r4, [r3] @ value of sdrc power
99 orr r4, r4, #0x40 @ enable self refresh on idle req
100 mov r5, #0x2000 @ set delay (DPLL relock + DLL relock)
101 str r4, [r3] @ make it so
102 mov r2, #0
103 nop
104 mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt
105 nop
106loop:
107 subs r5, r5, #0x1 @ awake, wait just a bit
108 bne loop
109
110 /* The DPLL has on before we take the DDR out of self refresh */
111 bic r4, r4, #0x40 @ now clear self refresh bit.
112 str r4, [r3] @ put vlaue back.
113 ldr r4, A_SDRC0 @ make a clock happen
114 ldr r4, [r4]
115 nop @ start auto refresh only after clk ok
116 movs r0, r0 @ see if DDR or SDR
117 ldrne r1, A_SDRC_DLLA_CTRL_S @ get addr of DLL ctrl
118 strne r0, [r1] @ rewrite DLLA to force DLL reload
119 addne r1, r1, #0x8 @ move to DLLB
120 strne r0, [r1] @ rewrite DLLB to force DLL reload
121
122 mov r5, #0x1000
123loop2:
124 subs r5, r5, #0x1
125 bne loop2
126 /* resume*/
127 ldmfd sp!, {r0 - r12, pc} @ restore regs and return
128
129A_SDRC_POWER:
130 .word A_SDRC_POWER_V
131A_SDRC0:
132 .word A_SDRC0_V
133A_CM_CLKSEL2_PLL_S:
134 .word A_CM_CLKSEL2_PLL_V
135A_CM_CLKEN_PLL:
136 .word A_CM_CLKEN_PLL_V
137A_SDRC_DLLA_CTRL_S:
138 .word A_SDRC_DLLA_CTRL_V
139A_SDRC_MANUAL_S:
140 .word A_SDRC_MANUAL_V
141
142ENTRY(omap24xx_cpu_suspend_sz)
143 .word . - omap24xx_cpu_suspend
144
diff --git a/arch/arm/mach-omap2/sram-fn.S b/arch/arm/mach-omap2/sram-fn.S
index 2a869e203342..d261e4ff4d9b 100644
--- a/arch/arm/mach-omap2/sram-fn.S
+++ b/arch/arm/mach-omap2/sram-fn.S
@@ -1,5 +1,5 @@
1/* 1/*
2 * linux/arch/arm/mach-omap1/sram.S 2 * linux/arch/arm/mach-omap2/sram.S
3 * 3 *
4 * Omap2 specific functions that need to be run in internal SRAM 4 * Omap2 specific functions that need to be run in internal SRAM
5 * 5 *
@@ -28,7 +28,7 @@
28#include <asm/arch/io.h> 28#include <asm/arch/io.h>
29#include <asm/hardware.h> 29#include <asm/hardware.h>
30 30
31#include <asm/arch/prcm.h> 31#include "prcm-regs.h"
32 32
33#define TIMER_32KSYNCT_CR_V IO_ADDRESS(OMAP24XX_32KSYNCT_BASE + 0x010) 33#define TIMER_32KSYNCT_CR_V IO_ADDRESS(OMAP24XX_32KSYNCT_BASE + 0x010)
34 34
diff --git a/arch/arm/plat-omap/pm.c b/arch/arm/plat-omap/pm.c
index 093efd786f21..1a24e2c10714 100644
--- a/arch/arm/plat-omap/pm.c
+++ b/arch/arm/plat-omap/pm.c
@@ -38,6 +38,7 @@
38#include <linux/pm.h> 38#include <linux/pm.h>
39#include <linux/sched.h> 39#include <linux/sched.h>
40#include <linux/proc_fs.h> 40#include <linux/proc_fs.h>
41#include <linux/pm.h>
41#include <linux/interrupt.h> 42#include <linux/interrupt.h>
42 43
43#include <asm/io.h> 44#include <asm/io.h>
diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index ee82763b02b8..b7bf09b1b412 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -16,24 +16,94 @@
16#include <linux/kernel.h> 16#include <linux/kernel.h>
17#include <linux/init.h> 17#include <linux/init.h>
18 18
19#include <asm/mach/map.h>
20#include <asm/tlb.h> 19#include <asm/tlb.h>
21#include <asm/io.h> 20#include <asm/io.h>
22#include <asm/cacheflush.h> 21#include <asm/cacheflush.h>
23 22
23#include <asm/mach/map.h>
24
24#include <asm/arch/sram.h> 25#include <asm/arch/sram.h>
26#include <asm/arch/board.h>
25 27
26#define OMAP1_SRAM_PA 0x20000000 28#define OMAP1_SRAM_PA 0x20000000
27#define OMAP1_SRAM_VA 0xd0000000 29#define OMAP1_SRAM_VA 0xd0000000
28#define OMAP2_SRAM_PA 0x40200000 30#define OMAP2_SRAM_PA 0x40200000
31#define OMAP2_SRAM_PUB_PA 0x4020f800
29#define OMAP2_SRAM_VA 0xd0000000 32#define OMAP2_SRAM_VA 0xd0000000
33#define OMAP2_SRAM_PUB_VA 0xd0000800
30 34
35#if defined(CONFIG_ARCH_OMAP24XX)
36#define SRAM_BOOTLOADER_SZ 0x00
37#else
31#define SRAM_BOOTLOADER_SZ 0x80 38#define SRAM_BOOTLOADER_SZ 0x80
39#endif
40
41#define VA_REQINFOPERM0 IO_ADDRESS(0x68005048)
42#define VA_READPERM0 IO_ADDRESS(0x68005050)
43#define VA_WRITEPERM0 IO_ADDRESS(0x68005058)
44#define VA_CONTROL_STAT IO_ADDRESS(0x480002F8)
45#define GP_DEVICE 0x300
46#define TYPE_MASK 0x700
47
48#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
32 49
33static unsigned long omap_sram_base; 50static unsigned long omap_sram_base;
34static unsigned long omap_sram_size; 51static unsigned long omap_sram_size;
35static unsigned long omap_sram_ceil; 52static unsigned long omap_sram_ceil;
36 53
54unsigned long omap_fb_sram_start;
55unsigned long omap_fb_sram_size;
56
57/* Depending on the target RAMFS firewall setup, the public usable amount of
58 * SRAM varies. The default accessable size for all device types is 2k. A GP
59 * device allows ARM11 but not other initators for full size. This
60 * functionality seems ok until some nice security API happens.
61 */
62static int is_sram_locked(void)
63{
64 int type = 0;
65
66 if (cpu_is_omap242x())
67 type = __raw_readl(VA_CONTROL_STAT) & TYPE_MASK;
68
69 if (type == GP_DEVICE) {
70 /* RAMFW: R/W access to all initators for all qualifier sets */
71 if (cpu_is_omap242x()) {
72 __raw_writel(0xFF, VA_REQINFOPERM0); /* all q-vects */
73 __raw_writel(0xCFDE, VA_READPERM0); /* all i-read */
74 __raw_writel(0xCFDE, VA_WRITEPERM0); /* all i-write */
75 }
76 return 0;
77 } else
78 return 1; /* assume locked with no PPA or security driver */
79}
80
81void get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
82 unsigned long *start, unsigned long *size)
83{
84 const struct omap_fbmem_config *fbmem_conf;
85
86 fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
87 if (fbmem_conf != NULL) {
88 *start = fbmem_conf->fb_sram_start;
89 *size = fbmem_conf->fb_sram_size;
90 } else {
91 *size = 0;
92 *start = 0;
93 }
94
95 if (*size && (
96 *start < start_avail ||
97 *start + *size > start_avail + size_avail)) {
98 printk(KERN_ERR "invalid FB SRAM configuration\n");
99 *start = start_avail;
100 *size = size_avail;
101 }
102
103 if (*size)
104 pr_info("Reserving %lu bytes SRAM for frame buffer\n", *size);
105}
106
37/* 107/*
38 * The amount of SRAM depends on the core type. 108 * The amount of SRAM depends on the core type.
39 * Note that we cannot try to test for SRAM here because writes 109 * Note that we cannot try to test for SRAM here because writes
@@ -42,26 +112,45 @@ static unsigned long omap_sram_ceil;
42 */ 112 */
43void __init omap_detect_sram(void) 113void __init omap_detect_sram(void)
44{ 114{
45 if (!cpu_is_omap24xx()) 115 unsigned long sram_start;
116
117 if (cpu_is_omap24xx()) {
118 if (is_sram_locked()) {
119 omap_sram_base = OMAP2_SRAM_PUB_VA;
120 sram_start = OMAP2_SRAM_PUB_PA;
121 omap_sram_size = 0x800; /* 2K */
122 } else {
123 omap_sram_base = OMAP2_SRAM_VA;
124 sram_start = OMAP2_SRAM_PA;
125 if (cpu_is_omap242x())
126 omap_sram_size = 0xa0000; /* 640K */
127 else if (cpu_is_omap243x())
128 omap_sram_size = 0x10000; /* 64K */
129 }
130 } else {
46 omap_sram_base = OMAP1_SRAM_VA; 131 omap_sram_base = OMAP1_SRAM_VA;
47 else 132 sram_start = OMAP1_SRAM_PA;
48 omap_sram_base = OMAP2_SRAM_VA; 133
49 134 if (cpu_is_omap730())
50 if (cpu_is_omap730()) 135 omap_sram_size = 0x32000; /* 200K */
51 omap_sram_size = 0x32000; /* 200K */ 136 else if (cpu_is_omap15xx())
52 else if (cpu_is_omap15xx()) 137 omap_sram_size = 0x30000; /* 192K */
53 omap_sram_size = 0x30000; /* 192K */ 138 else if (cpu_is_omap1610() || cpu_is_omap1621() ||
54 else if (cpu_is_omap1610() || cpu_is_omap1621() || cpu_is_omap1710()) 139 cpu_is_omap1710())
55 omap_sram_size = 0x4000; /* 16K */ 140 omap_sram_size = 0x4000; /* 16K */
56 else if (cpu_is_omap1611()) 141 else if (cpu_is_omap1611())
57 omap_sram_size = 0x3e800; /* 250K */ 142 omap_sram_size = 0x3e800; /* 250K */
58 else if (cpu_is_omap2420()) 143 else {
59 omap_sram_size = 0xa0014; /* 640K */ 144 printk(KERN_ERR "Could not detect SRAM size\n");
60 else { 145 omap_sram_size = 0x4000;
61 printk(KERN_ERR "Could not detect SRAM size\n"); 146 }
62 omap_sram_size = 0x4000;
63 } 147 }
64 148 get_fb_sram_conf(sram_start + SRAM_BOOTLOADER_SZ,
149 omap_sram_size - SRAM_BOOTLOADER_SZ,
150 &omap_fb_sram_start, &omap_fb_sram_size);
151 if (omap_fb_sram_size)
152 omap_sram_size -= sram_start + omap_sram_size -
153 omap_fb_sram_start;
65 omap_sram_ceil = omap_sram_base + omap_sram_size; 154 omap_sram_ceil = omap_sram_base + omap_sram_size;
66} 155}
67 156
@@ -80,12 +169,20 @@ static struct map_desc omap_sram_io_desc[] __initdata = {
80 */ 169 */
81void __init omap_map_sram(void) 170void __init omap_map_sram(void)
82{ 171{
172 unsigned long base;
173
83 if (omap_sram_size == 0) 174 if (omap_sram_size == 0)
84 return; 175 return;
85 176
86 if (cpu_is_omap24xx()) { 177 if (cpu_is_omap24xx()) {
87 omap_sram_io_desc[0].virtual = OMAP2_SRAM_VA; 178 omap_sram_io_desc[0].virtual = OMAP2_SRAM_VA;
88 omap_sram_io_desc[0].pfn = __phys_to_pfn(OMAP2_SRAM_PA); 179
180 if (is_sram_locked())
181 base = OMAP2_SRAM_PUB_PA;
182 else
183 base = OMAP2_SRAM_PA;
184 base = ROUND_DOWN(base, PAGE_SIZE);
185 omap_sram_io_desc[0].pfn = __phys_to_pfn(base);
89 } 186 }
90 187
91 omap_sram_io_desc[0].length = (omap_sram_size + PAGE_SIZE-1)/PAGE_SIZE; 188 omap_sram_io_desc[0].length = (omap_sram_size + PAGE_SIZE-1)/PAGE_SIZE;
@@ -93,7 +190,8 @@ void __init omap_map_sram(void)
93 iotable_init(omap_sram_io_desc, ARRAY_SIZE(omap_sram_io_desc)); 190 iotable_init(omap_sram_io_desc, ARRAY_SIZE(omap_sram_io_desc));
94 191
95 printk(KERN_INFO "SRAM: Mapped pa 0x%08lx to va 0x%08lx size: 0x%lx\n", 192 printk(KERN_INFO "SRAM: Mapped pa 0x%08lx to va 0x%08lx size: 0x%lx\n",
96 omap_sram_io_desc[0].pfn, omap_sram_io_desc[0].virtual, 193 __pfn_to_phys(omap_sram_io_desc[0].pfn),
194 omap_sram_io_desc[0].virtual,
97 omap_sram_io_desc[0].length); 195 omap_sram_io_desc[0].length);
98 196
99 /* 197 /*
@@ -118,8 +216,9 @@ void * omap_sram_push(void * start, unsigned long size)
118 printk(KERN_ERR "Not enough space in SRAM\n"); 216 printk(KERN_ERR "Not enough space in SRAM\n");
119 return NULL; 217 return NULL;
120 } 218 }
219
121 omap_sram_ceil -= size; 220 omap_sram_ceil -= size;
122 omap_sram_ceil &= ~0x3; 221 omap_sram_ceil = ROUND_DOWN(omap_sram_ceil, sizeof(void *));
123 memcpy((void *)omap_sram_ceil, start, size); 222 memcpy((void *)omap_sram_ceil, start, size);
124 223
125 return (void *)omap_sram_ceil; 224 return (void *)omap_sram_ceil;
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-11 19:55:57 -0500