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1/*
2 * OMAP2/3 System Control Module register access
3 *
4 * Copyright (C) 2007, 2012 Texas Instruments, Inc.
5 * Copyright (C) 2007 Nokia Corporation
6 *
7 * Written by Paul Walmsley
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13#undef DEBUG
14
15#include <linux/kernel.h>
16#include <linux/io.h>
17
18#include "soc.h"
19#include "iomap.h"
20#include "common.h"
21#include "cm-regbits-34xx.h"
22#include "prm-regbits-34xx.h"
23#include "prm3xxx.h"
24#include "cm3xxx.h"
25#include "sdrc.h"
26#include "pm.h"
27#include "control.h"
28
29/* Used by omap3_ctrl_save_padconf() */
30#define START_PADCONF_SAVE 0x2
31#define PADCONF_SAVE_DONE 0x1
32
33static void __iomem *omap2_ctrl_base;
34static void __iomem *omap4_ctrl_pad_base;
35
36#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
37struct omap3_scratchpad {
38 u32 boot_config_ptr;
39 u32 public_restore_ptr;
40 u32 secure_ram_restore_ptr;
41 u32 sdrc_module_semaphore;
42 u32 prcm_block_offset;
43 u32 sdrc_block_offset;
44};
45
46struct omap3_scratchpad_prcm_block {
47 u32 prm_clksrc_ctrl;
48 u32 prm_clksel;
49 u32 cm_contents[11];
50 u32 prcm_block_size;
51};
52
53struct omap3_scratchpad_sdrc_block {
54 u16 sysconfig;
55 u16 cs_cfg;
56 u16 sharing;
57 u16 err_type;
58 u32 dll_a_ctrl;
59 u32 dll_b_ctrl;
60 u32 power;
61 u32 cs_0;
62 u32 mcfg_0;
63 u16 mr_0;
64 u16 emr_1_0;
65 u16 emr_2_0;
66 u16 emr_3_0;
67 u32 actim_ctrla_0;
68 u32 actim_ctrlb_0;
69 u32 rfr_ctrl_0;
70 u32 cs_1;
71 u32 mcfg_1;
72 u16 mr_1;
73 u16 emr_1_1;
74 u16 emr_2_1;
75 u16 emr_3_1;
76 u32 actim_ctrla_1;
77 u32 actim_ctrlb_1;
78 u32 rfr_ctrl_1;
79 u16 dcdl_1_ctrl;
80 u16 dcdl_2_ctrl;
81 u32 flags;
82 u32 block_size;
83};
84
85void *omap3_secure_ram_storage;
86
87/*
88 * This is used to store ARM registers in SDRAM before attempting
89 * an MPU OFF. The save and restore happens from the SRAM sleep code.
90 * The address is stored in scratchpad, so that it can be used
91 * during the restore path.
92 */
93u32 omap3_arm_context[128];
94
95struct omap3_control_regs {
96 u32 sysconfig;
97 u32 devconf0;
98 u32 mem_dftrw0;
99 u32 mem_dftrw1;
100 u32 msuspendmux_0;
101 u32 msuspendmux_1;
102 u32 msuspendmux_2;
103 u32 msuspendmux_3;
104 u32 msuspendmux_4;
105 u32 msuspendmux_5;
106 u32 sec_ctrl;
107 u32 devconf1;
108 u32 csirxfe;
109 u32 iva2_bootaddr;
110 u32 iva2_bootmod;
111 u32 debobs_0;
112 u32 debobs_1;
113 u32 debobs_2;
114 u32 debobs_3;
115 u32 debobs_4;
116 u32 debobs_5;
117 u32 debobs_6;
118 u32 debobs_7;
119 u32 debobs_8;
120 u32 prog_io0;
121 u32 prog_io1;
122 u32 dss_dpll_spreading;
123 u32 core_dpll_spreading;
124 u32 per_dpll_spreading;
125 u32 usbhost_dpll_spreading;
126 u32 pbias_lite;
127 u32 temp_sensor;
128 u32 sramldo4;
129 u32 sramldo5;
130 u32 csi;
131 u32 padconf_sys_nirq;
132};
133
134static struct omap3_control_regs control_context;
135#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
136
137#define OMAP_CTRL_REGADDR(reg) (omap2_ctrl_base + (reg))
138#define OMAP4_CTRL_PAD_REGADDR(reg) (omap4_ctrl_pad_base + (reg))
139
140void __init omap2_set_globals_control(void __iomem *ctrl,
141 void __iomem *ctrl_pad)
142{
143 omap2_ctrl_base = ctrl;
144 omap4_ctrl_pad_base = ctrl_pad;
145}
146
147void __iomem *omap_ctrl_base_get(void)
148{
149 return omap2_ctrl_base;
150}
151
152u8 omap_ctrl_readb(u16 offset)
153{
154 return __raw_readb(OMAP_CTRL_REGADDR(offset));
155}
156
157u16 omap_ctrl_readw(u16 offset)
158{
159 return __raw_readw(OMAP_CTRL_REGADDR(offset));
160}
161
162u32 omap_ctrl_readl(u16 offset)
163{
164 return __raw_readl(OMAP_CTRL_REGADDR(offset));
165}
166
167void omap_ctrl_writeb(u8 val, u16 offset)
168{
169 __raw_writeb(val, OMAP_CTRL_REGADDR(offset));
170}
171
172void omap_ctrl_writew(u16 val, u16 offset)
173{
174 __raw_writew(val, OMAP_CTRL_REGADDR(offset));
175}
176
177void omap_ctrl_writel(u32 val, u16 offset)
178{
179 __raw_writel(val, OMAP_CTRL_REGADDR(offset));
180}
181
182/*
183 * On OMAP4 control pad are not addressable from control
184 * core base. So the common omap_ctrl_read/write APIs breaks
185 * Hence export separate APIs to manage the omap4 pad control
186 * registers. This APIs will work only for OMAP4
187 */
188
189u32 omap4_ctrl_pad_readl(u16 offset)
190{
191 return __raw_readl(OMAP4_CTRL_PAD_REGADDR(offset));
192}
193
194void omap4_ctrl_pad_writel(u32 val, u16 offset)
195{
196 __raw_writel(val, OMAP4_CTRL_PAD_REGADDR(offset));
197}
198
199#ifdef CONFIG_ARCH_OMAP3
200
201/**
202 * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
203 * @bootmode: 8-bit value to pass to some boot code
204 *
205 * Set the bootmode in the scratchpad RAM. This is used after the
206 * system restarts. Not sure what actually uses this - it may be the
207 * bootloader, rather than the boot ROM - contrary to the preserved
208 * comment below. No return value.
209 */
210void omap3_ctrl_write_boot_mode(u8 bootmode)
211{
212 u32 l;
213
214 l = ('B' << 24) | ('M' << 16) | bootmode;
215
216 /*
217 * Reserve the first word in scratchpad for communicating
218 * with the boot ROM. A pointer to a data structure
219 * describing the boot process can be stored there,
220 * cf. OMAP34xx TRM, Initialization / Software Booting
221 * Configuration.
222 *
223 * XXX This should use some omap_ctrl_writel()-type function
224 */
225 __raw_writel(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
226}
227
228#endif
229
230/**
231 * omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor
232 * @bootaddr: physical address of the boot loader
233 *
234 * Set boot address for the boot loader of a supported processor
235 * when a power ON sequence occurs.
236 */
237void omap_ctrl_write_dsp_boot_addr(u32 bootaddr)
238{
239 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR :
240 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR :
241 cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
242 soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
243 0;
244
245 if (!offset) {
246 pr_err("%s: unsupported omap type\n", __func__);
247 return;
248 }
249
250 omap_ctrl_writel(bootaddr, offset);
251}
252
253/**
254 * omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor
255 * @bootmode: 8-bit value to pass to some boot code
256 *
257 * Sets boot mode for the boot loader of a supported processor
258 * when a power ON sequence occurs.
259 */
260void omap_ctrl_write_dsp_boot_mode(u8 bootmode)
261{
262 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD :
263 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD :
264 0;
265
266 if (!offset) {
267 pr_err("%s: unsupported omap type\n", __func__);
268 return;
269 }
270
271 omap_ctrl_writel(bootmode, offset);
272}
273
274#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
275/*
276 * Clears the scratchpad contents in case of cold boot-
277 * called during bootup
278 */
279void omap3_clear_scratchpad_contents(void)
280{
281 u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET;
282 void __iomem *v_addr;
283 u32 offset = 0;
284 v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
285 if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) &
286 OMAP3430_GLOBAL_COLD_RST_MASK) {
287 for ( ; offset <= max_offset; offset += 0x4)
288 __raw_writel(0x0, (v_addr + offset));
289 omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK,
290 OMAP3430_GR_MOD,
291 OMAP3_PRM_RSTST_OFFSET);
292 }
293}
294
295/* Populate the scratchpad structure with restore structure */
296void omap3_save_scratchpad_contents(void)
297{
298 void __iomem *scratchpad_address;
299 u32 arm_context_addr;
300 struct omap3_scratchpad scratchpad_contents;
301 struct omap3_scratchpad_prcm_block prcm_block_contents;
302 struct omap3_scratchpad_sdrc_block sdrc_block_contents;
303
304 /*
305 * Populate the Scratchpad contents
306 *
307 * The "get_*restore_pointer" functions are used to provide a
308 * physical restore address where the ROM code jumps while waking
309 * up from MPU OFF/OSWR state.
310 * The restore pointer is stored into the scratchpad.
311 */
312 scratchpad_contents.boot_config_ptr = 0x0;
313 if (cpu_is_omap3630())
314 scratchpad_contents.public_restore_ptr =
315 virt_to_phys(omap3_restore_3630);
316 else if (omap_rev() != OMAP3430_REV_ES3_0 &&
317 omap_rev() != OMAP3430_REV_ES3_1)
318 scratchpad_contents.public_restore_ptr =
319 virt_to_phys(omap3_restore);
320 else
321 scratchpad_contents.public_restore_ptr =
322 virt_to_phys(omap3_restore_es3);
323
324 if (omap_type() == OMAP2_DEVICE_TYPE_GP)
325 scratchpad_contents.secure_ram_restore_ptr = 0x0;
326 else
327 scratchpad_contents.secure_ram_restore_ptr =
328 (u32) __pa(omap3_secure_ram_storage);
329 scratchpad_contents.sdrc_module_semaphore = 0x0;
330 scratchpad_contents.prcm_block_offset = 0x2C;
331 scratchpad_contents.sdrc_block_offset = 0x64;
332
333 /* Populate the PRCM block contents */
334 prcm_block_contents.prm_clksrc_ctrl =
335 omap2_prm_read_mod_reg(OMAP3430_GR_MOD,
336 OMAP3_PRM_CLKSRC_CTRL_OFFSET);
337 prcm_block_contents.prm_clksel =
338 omap2_prm_read_mod_reg(OMAP3430_CCR_MOD,
339 OMAP3_PRM_CLKSEL_OFFSET);
340
341 omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
342
343 prcm_block_contents.prcm_block_size = 0x0;
344
345 /* Populate the SDRC block contents */
346 sdrc_block_contents.sysconfig =
347 (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
348 sdrc_block_contents.cs_cfg =
349 (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
350 sdrc_block_contents.sharing =
351 (sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
352 sdrc_block_contents.err_type =
353 (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
354 sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
355 sdrc_block_contents.dll_b_ctrl = 0x0;
356 /*
357 * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
358 * be programed to issue automatic self refresh on timeout
359 * of AUTO_CNT = 1 prior to any transition to OFF mode.
360 */
361 if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
362 && (omap_rev() >= OMAP3430_REV_ES3_0))
363 sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
364 ~(SDRC_POWER_AUTOCOUNT_MASK|
365 SDRC_POWER_CLKCTRL_MASK)) |
366 (1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
367 SDRC_SELF_REFRESH_ON_AUTOCOUNT;
368 else
369 sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
370
371 sdrc_block_contents.cs_0 = 0x0;
372 sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
373 sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
374 sdrc_block_contents.emr_1_0 = 0x0;
375 sdrc_block_contents.emr_2_0 = 0x0;
376 sdrc_block_contents.emr_3_0 = 0x0;
377 sdrc_block_contents.actim_ctrla_0 =
378 sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
379 sdrc_block_contents.actim_ctrlb_0 =
380 sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
381 sdrc_block_contents.rfr_ctrl_0 =
382 sdrc_read_reg(SDRC_RFR_CTRL_0);
383 sdrc_block_contents.cs_1 = 0x0;
384 sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
385 sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
386 sdrc_block_contents.emr_1_1 = 0x0;
387 sdrc_block_contents.emr_2_1 = 0x0;
388 sdrc_block_contents.emr_3_1 = 0x0;
389 sdrc_block_contents.actim_ctrla_1 =
390 sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
391 sdrc_block_contents.actim_ctrlb_1 =
392 sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
393 sdrc_block_contents.rfr_ctrl_1 =
394 sdrc_read_reg(SDRC_RFR_CTRL_1);
395 sdrc_block_contents.dcdl_1_ctrl = 0x0;
396 sdrc_block_contents.dcdl_2_ctrl = 0x0;
397 sdrc_block_contents.flags = 0x0;
398 sdrc_block_contents.block_size = 0x0;
399
400 arm_context_addr = virt_to_phys(omap3_arm_context);
401
402 /* Copy all the contents to the scratchpad location */
403 scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
404 memcpy_toio(scratchpad_address, &scratchpad_contents,
405 sizeof(scratchpad_contents));
406 /* Scratchpad contents being 32 bits, a divide by 4 done here */
407 memcpy_toio(scratchpad_address +
408 scratchpad_contents.prcm_block_offset,
409 &prcm_block_contents, sizeof(prcm_block_contents));
410 memcpy_toio(scratchpad_address +
411 scratchpad_contents.sdrc_block_offset,
412 &sdrc_block_contents, sizeof(sdrc_block_contents));
413 /*
414 * Copies the address of the location in SDRAM where ARM
415 * registers get saved during a MPU OFF transition.
416 */
417 memcpy_toio(scratchpad_address +
418 scratchpad_contents.sdrc_block_offset +
419 sizeof(sdrc_block_contents), &arm_context_addr, 4);
420}
421
422void omap3_control_save_context(void)
423{
424 control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
425 control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
426 control_context.mem_dftrw0 =
427 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
428 control_context.mem_dftrw1 =
429 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
430 control_context.msuspendmux_0 =
431 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
432 control_context.msuspendmux_1 =
433 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
434 control_context.msuspendmux_2 =
435 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
436 control_context.msuspendmux_3 =
437 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
438 control_context.msuspendmux_4 =
439 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
440 control_context.msuspendmux_5 =
441 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
442 control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
443 control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
444 control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
445 control_context.iva2_bootaddr =
446 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
447 control_context.iva2_bootmod =
448 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
449 control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
450 control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
451 control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
452 control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
453 control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
454 control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
455 control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
456 control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
457 control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
458 control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
459 control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
460 control_context.dss_dpll_spreading =
461 omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
462 control_context.core_dpll_spreading =
463 omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
464 control_context.per_dpll_spreading =
465 omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
466 control_context.usbhost_dpll_spreading =
467 omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
468 control_context.pbias_lite =
469 omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
470 control_context.temp_sensor =
471 omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
472 control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
473 control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
474 control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
475 control_context.padconf_sys_nirq =
476 omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
477 return;
478}
479
480void omap3_control_restore_context(void)
481{
482 omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
483 omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
484 omap_ctrl_writel(control_context.mem_dftrw0,
485 OMAP343X_CONTROL_MEM_DFTRW0);
486 omap_ctrl_writel(control_context.mem_dftrw1,
487 OMAP343X_CONTROL_MEM_DFTRW1);
488 omap_ctrl_writel(control_context.msuspendmux_0,
489 OMAP2_CONTROL_MSUSPENDMUX_0);
490 omap_ctrl_writel(control_context.msuspendmux_1,
491 OMAP2_CONTROL_MSUSPENDMUX_1);
492 omap_ctrl_writel(control_context.msuspendmux_2,
493 OMAP2_CONTROL_MSUSPENDMUX_2);
494 omap_ctrl_writel(control_context.msuspendmux_3,
495 OMAP2_CONTROL_MSUSPENDMUX_3);
496 omap_ctrl_writel(control_context.msuspendmux_4,
497 OMAP2_CONTROL_MSUSPENDMUX_4);
498 omap_ctrl_writel(control_context.msuspendmux_5,
499 OMAP2_CONTROL_MSUSPENDMUX_5);
500 omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
501 omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
502 omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
503 omap_ctrl_writel(control_context.iva2_bootaddr,
504 OMAP343X_CONTROL_IVA2_BOOTADDR);
505 omap_ctrl_writel(control_context.iva2_bootmod,
506 OMAP343X_CONTROL_IVA2_BOOTMOD);
507 omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
508 omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
509 omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
510 omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
511 omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
512 omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
513 omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
514 omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
515 omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
516 omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
517 omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
518 omap_ctrl_writel(control_context.dss_dpll_spreading,
519 OMAP343X_CONTROL_DSS_DPLL_SPREADING);
520 omap_ctrl_writel(control_context.core_dpll_spreading,
521 OMAP343X_CONTROL_CORE_DPLL_SPREADING);
522 omap_ctrl_writel(control_context.per_dpll_spreading,
523 OMAP343X_CONTROL_PER_DPLL_SPREADING);
524 omap_ctrl_writel(control_context.usbhost_dpll_spreading,
525 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
526 omap_ctrl_writel(control_context.pbias_lite,
527 OMAP343X_CONTROL_PBIAS_LITE);
528 omap_ctrl_writel(control_context.temp_sensor,
529 OMAP343X_CONTROL_TEMP_SENSOR);
530 omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
531 omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
532 omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
533 omap_ctrl_writel(control_context.padconf_sys_nirq,
534 OMAP343X_CONTROL_PADCONF_SYSNIRQ);
535 return;
536}
537
538void omap3630_ctrl_disable_rta(void)
539{
540 if (!cpu_is_omap3630())
541 return;
542 omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
543}
544
545/**
546 * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
547 *
548 * Tell the SCM to start saving the padconf registers, then wait for
549 * the process to complete. Returns 0 unconditionally, although it
550 * should also eventually be able to return -ETIMEDOUT, if the save
551 * does not complete.
552 *
553 * XXX This function is missing a timeout. What should it be?
554 */
555int omap3_ctrl_save_padconf(void)
556{
557 u32 cpo;
558
559 /* Save the padconf registers */
560 cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
561 cpo |= START_PADCONF_SAVE;
562 omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
563
564 /* wait for the save to complete */
565 while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
566 & PADCONF_SAVE_DONE))
567 udelay(1);
568
569 return 0;
570}
571
572/**
573 * omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
574 *
575 * Sets the bootmode for IVA2 to idle. This is needed by the PM code to
576 * force disable IVA2 so that it does not prevent any low-power states.
577 */
578void omap3_ctrl_set_iva_bootmode_idle(void)
579{
580 omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
581 OMAP343X_CONTROL_IVA2_BOOTMOD);
582}
583#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
1/*
2 * OMAP2/3 System Control Module register access
3 *
4 * Copyright (C) 2007 Texas Instruments, Inc.
5 * Copyright (C) 2007 Nokia Corporation
6 *
7 * Written by Paul Walmsley
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13#undef DEBUG
14
15#include <linux/kernel.h>
16#include <linux/io.h>
17
18#include <plat/hardware.h>
19#include <plat/sdrc.h>
20
21#include "iomap.h"
22#include "common.h"
23#include "cm-regbits-34xx.h"
24#include "prm-regbits-34xx.h"
25#include "prm2xxx_3xxx.h"
26#include "cm2xxx_3xxx.h"
27#include "sdrc.h"
28#include "pm.h"
29#include "control.h"
30
31/* Used by omap3_ctrl_save_padconf() */
32#define START_PADCONF_SAVE 0x2
33#define PADCONF_SAVE_DONE 0x1
34
35static void __iomem *omap2_ctrl_base;
36static void __iomem *omap4_ctrl_pad_base;
37
38#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
39struct omap3_scratchpad {
40 u32 boot_config_ptr;
41 u32 public_restore_ptr;
42 u32 secure_ram_restore_ptr;
43 u32 sdrc_module_semaphore;
44 u32 prcm_block_offset;
45 u32 sdrc_block_offset;
46};
47
48struct omap3_scratchpad_prcm_block {
49 u32 prm_clksrc_ctrl;
50 u32 prm_clksel;
51 u32 cm_clksel_core;
52 u32 cm_clksel_wkup;
53 u32 cm_clken_pll;
54 u32 cm_autoidle_pll;
55 u32 cm_clksel1_pll;
56 u32 cm_clksel2_pll;
57 u32 cm_clksel3_pll;
58 u32 cm_clken_pll_mpu;
59 u32 cm_autoidle_pll_mpu;
60 u32 cm_clksel1_pll_mpu;
61 u32 cm_clksel2_pll_mpu;
62 u32 prcm_block_size;
63};
64
65struct omap3_scratchpad_sdrc_block {
66 u16 sysconfig;
67 u16 cs_cfg;
68 u16 sharing;
69 u16 err_type;
70 u32 dll_a_ctrl;
71 u32 dll_b_ctrl;
72 u32 power;
73 u32 cs_0;
74 u32 mcfg_0;
75 u16 mr_0;
76 u16 emr_1_0;
77 u16 emr_2_0;
78 u16 emr_3_0;
79 u32 actim_ctrla_0;
80 u32 actim_ctrlb_0;
81 u32 rfr_ctrl_0;
82 u32 cs_1;
83 u32 mcfg_1;
84 u16 mr_1;
85 u16 emr_1_1;
86 u16 emr_2_1;
87 u16 emr_3_1;
88 u32 actim_ctrla_1;
89 u32 actim_ctrlb_1;
90 u32 rfr_ctrl_1;
91 u16 dcdl_1_ctrl;
92 u16 dcdl_2_ctrl;
93 u32 flags;
94 u32 block_size;
95};
96
97void *omap3_secure_ram_storage;
98
99/*
100 * This is used to store ARM registers in SDRAM before attempting
101 * an MPU OFF. The save and restore happens from the SRAM sleep code.
102 * The address is stored in scratchpad, so that it can be used
103 * during the restore path.
104 */
105u32 omap3_arm_context[128];
106
107struct omap3_control_regs {
108 u32 sysconfig;
109 u32 devconf0;
110 u32 mem_dftrw0;
111 u32 mem_dftrw1;
112 u32 msuspendmux_0;
113 u32 msuspendmux_1;
114 u32 msuspendmux_2;
115 u32 msuspendmux_3;
116 u32 msuspendmux_4;
117 u32 msuspendmux_5;
118 u32 sec_ctrl;
119 u32 devconf1;
120 u32 csirxfe;
121 u32 iva2_bootaddr;
122 u32 iva2_bootmod;
123 u32 debobs_0;
124 u32 debobs_1;
125 u32 debobs_2;
126 u32 debobs_3;
127 u32 debobs_4;
128 u32 debobs_5;
129 u32 debobs_6;
130 u32 debobs_7;
131 u32 debobs_8;
132 u32 prog_io0;
133 u32 prog_io1;
134 u32 dss_dpll_spreading;
135 u32 core_dpll_spreading;
136 u32 per_dpll_spreading;
137 u32 usbhost_dpll_spreading;
138 u32 pbias_lite;
139 u32 temp_sensor;
140 u32 sramldo4;
141 u32 sramldo5;
142 u32 csi;
143 u32 padconf_sys_nirq;
144};
145
146static struct omap3_control_regs control_context;
147#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
148
149#define OMAP_CTRL_REGADDR(reg) (omap2_ctrl_base + (reg))
150#define OMAP4_CTRL_PAD_REGADDR(reg) (omap4_ctrl_pad_base + (reg))
151
152void __init omap2_set_globals_control(struct omap_globals *omap2_globals)
153{
154 if (omap2_globals->ctrl)
155 omap2_ctrl_base = omap2_globals->ctrl;
156
157 if (omap2_globals->ctrl_pad)
158 omap4_ctrl_pad_base = omap2_globals->ctrl_pad;
159}
160
161void __iomem *omap_ctrl_base_get(void)
162{
163 return omap2_ctrl_base;
164}
165
166u8 omap_ctrl_readb(u16 offset)
167{
168 return __raw_readb(OMAP_CTRL_REGADDR(offset));
169}
170
171u16 omap_ctrl_readw(u16 offset)
172{
173 return __raw_readw(OMAP_CTRL_REGADDR(offset));
174}
175
176u32 omap_ctrl_readl(u16 offset)
177{
178 return __raw_readl(OMAP_CTRL_REGADDR(offset));
179}
180
181void omap_ctrl_writeb(u8 val, u16 offset)
182{
183 __raw_writeb(val, OMAP_CTRL_REGADDR(offset));
184}
185
186void omap_ctrl_writew(u16 val, u16 offset)
187{
188 __raw_writew(val, OMAP_CTRL_REGADDR(offset));
189}
190
191void omap_ctrl_writel(u32 val, u16 offset)
192{
193 __raw_writel(val, OMAP_CTRL_REGADDR(offset));
194}
195
196/*
197 * On OMAP4 control pad are not addressable from control
198 * core base. So the common omap_ctrl_read/write APIs breaks
199 * Hence export separate APIs to manage the omap4 pad control
200 * registers. This APIs will work only for OMAP4
201 */
202
203u32 omap4_ctrl_pad_readl(u16 offset)
204{
205 return __raw_readl(OMAP4_CTRL_PAD_REGADDR(offset));
206}
207
208void omap4_ctrl_pad_writel(u32 val, u16 offset)
209{
210 __raw_writel(val, OMAP4_CTRL_PAD_REGADDR(offset));
211}
212
213#ifdef CONFIG_ARCH_OMAP3
214
215/**
216 * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
217 * @bootmode: 8-bit value to pass to some boot code
218 *
219 * Set the bootmode in the scratchpad RAM. This is used after the
220 * system restarts. Not sure what actually uses this - it may be the
221 * bootloader, rather than the boot ROM - contrary to the preserved
222 * comment below. No return value.
223 */
224void omap3_ctrl_write_boot_mode(u8 bootmode)
225{
226 u32 l;
227
228 l = ('B' << 24) | ('M' << 16) | bootmode;
229
230 /*
231 * Reserve the first word in scratchpad for communicating
232 * with the boot ROM. A pointer to a data structure
233 * describing the boot process can be stored there,
234 * cf. OMAP34xx TRM, Initialization / Software Booting
235 * Configuration.
236 *
237 * XXX This should use some omap_ctrl_writel()-type function
238 */
239 __raw_writel(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
240}
241
242#endif
243
244#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
245/*
246 * Clears the scratchpad contents in case of cold boot-
247 * called during bootup
248 */
249void omap3_clear_scratchpad_contents(void)
250{
251 u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET;
252 void __iomem *v_addr;
253 u32 offset = 0;
254 v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
255 if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) &
256 OMAP3430_GLOBAL_COLD_RST_MASK) {
257 for ( ; offset <= max_offset; offset += 0x4)
258 __raw_writel(0x0, (v_addr + offset));
259 omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK,
260 OMAP3430_GR_MOD,
261 OMAP3_PRM_RSTST_OFFSET);
262 }
263}
264
265/* Populate the scratchpad structure with restore structure */
266void omap3_save_scratchpad_contents(void)
267{
268 void __iomem *scratchpad_address;
269 u32 arm_context_addr;
270 struct omap3_scratchpad scratchpad_contents;
271 struct omap3_scratchpad_prcm_block prcm_block_contents;
272 struct omap3_scratchpad_sdrc_block sdrc_block_contents;
273
274 /*
275 * Populate the Scratchpad contents
276 *
277 * The "get_*restore_pointer" functions are used to provide a
278 * physical restore address where the ROM code jumps while waking
279 * up from MPU OFF/OSWR state.
280 * The restore pointer is stored into the scratchpad.
281 */
282 scratchpad_contents.boot_config_ptr = 0x0;
283 if (cpu_is_omap3630())
284 scratchpad_contents.public_restore_ptr =
285 virt_to_phys(omap3_restore_3630);
286 else if (omap_rev() != OMAP3430_REV_ES3_0 &&
287 omap_rev() != OMAP3430_REV_ES3_1)
288 scratchpad_contents.public_restore_ptr =
289 virt_to_phys(omap3_restore);
290 else
291 scratchpad_contents.public_restore_ptr =
292 virt_to_phys(omap3_restore_es3);
293
294 if (omap_type() == OMAP2_DEVICE_TYPE_GP)
295 scratchpad_contents.secure_ram_restore_ptr = 0x0;
296 else
297 scratchpad_contents.secure_ram_restore_ptr =
298 (u32) __pa(omap3_secure_ram_storage);
299 scratchpad_contents.sdrc_module_semaphore = 0x0;
300 scratchpad_contents.prcm_block_offset = 0x2C;
301 scratchpad_contents.sdrc_block_offset = 0x64;
302
303 /* Populate the PRCM block contents */
304 prcm_block_contents.prm_clksrc_ctrl =
305 omap2_prm_read_mod_reg(OMAP3430_GR_MOD,
306 OMAP3_PRM_CLKSRC_CTRL_OFFSET);
307 prcm_block_contents.prm_clksel =
308 omap2_prm_read_mod_reg(OMAP3430_CCR_MOD,
309 OMAP3_PRM_CLKSEL_OFFSET);
310 prcm_block_contents.cm_clksel_core =
311 omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL);
312 prcm_block_contents.cm_clksel_wkup =
313 omap2_cm_read_mod_reg(WKUP_MOD, CM_CLKSEL);
314 prcm_block_contents.cm_clken_pll =
315 omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
316 /*
317 * As per erratum i671, ROM code does not respect the PER DPLL
318 * programming scheme if CM_AUTOIDLE_PLL..AUTO_PERIPH_DPLL == 1.
319 * Then, in anycase, clear these bits to avoid extra latencies.
320 */
321 prcm_block_contents.cm_autoidle_pll =
322 omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE) &
323 ~OMAP3430_AUTO_PERIPH_DPLL_MASK;
324 prcm_block_contents.cm_clksel1_pll =
325 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL);
326 prcm_block_contents.cm_clksel2_pll =
327 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL);
328 prcm_block_contents.cm_clksel3_pll =
329 omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3);
330 prcm_block_contents.cm_clken_pll_mpu =
331 omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL);
332 prcm_block_contents.cm_autoidle_pll_mpu =
333 omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL);
334 prcm_block_contents.cm_clksel1_pll_mpu =
335 omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL);
336 prcm_block_contents.cm_clksel2_pll_mpu =
337 omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL);
338 prcm_block_contents.prcm_block_size = 0x0;
339
340 /* Populate the SDRC block contents */
341 sdrc_block_contents.sysconfig =
342 (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
343 sdrc_block_contents.cs_cfg =
344 (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
345 sdrc_block_contents.sharing =
346 (sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
347 sdrc_block_contents.err_type =
348 (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
349 sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
350 sdrc_block_contents.dll_b_ctrl = 0x0;
351 /*
352 * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
353 * be programed to issue automatic self refresh on timeout
354 * of AUTO_CNT = 1 prior to any transition to OFF mode.
355 */
356 if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
357 && (omap_rev() >= OMAP3430_REV_ES3_0))
358 sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
359 ~(SDRC_POWER_AUTOCOUNT_MASK|
360 SDRC_POWER_CLKCTRL_MASK)) |
361 (1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
362 SDRC_SELF_REFRESH_ON_AUTOCOUNT;
363 else
364 sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
365
366 sdrc_block_contents.cs_0 = 0x0;
367 sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
368 sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
369 sdrc_block_contents.emr_1_0 = 0x0;
370 sdrc_block_contents.emr_2_0 = 0x0;
371 sdrc_block_contents.emr_3_0 = 0x0;
372 sdrc_block_contents.actim_ctrla_0 =
373 sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
374 sdrc_block_contents.actim_ctrlb_0 =
375 sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
376 sdrc_block_contents.rfr_ctrl_0 =
377 sdrc_read_reg(SDRC_RFR_CTRL_0);
378 sdrc_block_contents.cs_1 = 0x0;
379 sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
380 sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
381 sdrc_block_contents.emr_1_1 = 0x0;
382 sdrc_block_contents.emr_2_1 = 0x0;
383 sdrc_block_contents.emr_3_1 = 0x0;
384 sdrc_block_contents.actim_ctrla_1 =
385 sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
386 sdrc_block_contents.actim_ctrlb_1 =
387 sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
388 sdrc_block_contents.rfr_ctrl_1 =
389 sdrc_read_reg(SDRC_RFR_CTRL_1);
390 sdrc_block_contents.dcdl_1_ctrl = 0x0;
391 sdrc_block_contents.dcdl_2_ctrl = 0x0;
392 sdrc_block_contents.flags = 0x0;
393 sdrc_block_contents.block_size = 0x0;
394
395 arm_context_addr = virt_to_phys(omap3_arm_context);
396
397 /* Copy all the contents to the scratchpad location */
398 scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
399 memcpy_toio(scratchpad_address, &scratchpad_contents,
400 sizeof(scratchpad_contents));
401 /* Scratchpad contents being 32 bits, a divide by 4 done here */
402 memcpy_toio(scratchpad_address +
403 scratchpad_contents.prcm_block_offset,
404 &prcm_block_contents, sizeof(prcm_block_contents));
405 memcpy_toio(scratchpad_address +
406 scratchpad_contents.sdrc_block_offset,
407 &sdrc_block_contents, sizeof(sdrc_block_contents));
408 /*
409 * Copies the address of the location in SDRAM where ARM
410 * registers get saved during a MPU OFF transition.
411 */
412 memcpy_toio(scratchpad_address +
413 scratchpad_contents.sdrc_block_offset +
414 sizeof(sdrc_block_contents), &arm_context_addr, 4);
415}
416
417void omap3_control_save_context(void)
418{
419 control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
420 control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
421 control_context.mem_dftrw0 =
422 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
423 control_context.mem_dftrw1 =
424 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
425 control_context.msuspendmux_0 =
426 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
427 control_context.msuspendmux_1 =
428 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
429 control_context.msuspendmux_2 =
430 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
431 control_context.msuspendmux_3 =
432 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
433 control_context.msuspendmux_4 =
434 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
435 control_context.msuspendmux_5 =
436 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
437 control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
438 control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
439 control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
440 control_context.iva2_bootaddr =
441 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
442 control_context.iva2_bootmod =
443 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
444 control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
445 control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
446 control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
447 control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
448 control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
449 control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
450 control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
451 control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
452 control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
453 control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
454 control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
455 control_context.dss_dpll_spreading =
456 omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
457 control_context.core_dpll_spreading =
458 omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
459 control_context.per_dpll_spreading =
460 omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
461 control_context.usbhost_dpll_spreading =
462 omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
463 control_context.pbias_lite =
464 omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
465 control_context.temp_sensor =
466 omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
467 control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
468 control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
469 control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
470 control_context.padconf_sys_nirq =
471 omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
472 return;
473}
474
475void omap3_control_restore_context(void)
476{
477 omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
478 omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
479 omap_ctrl_writel(control_context.mem_dftrw0,
480 OMAP343X_CONTROL_MEM_DFTRW0);
481 omap_ctrl_writel(control_context.mem_dftrw1,
482 OMAP343X_CONTROL_MEM_DFTRW1);
483 omap_ctrl_writel(control_context.msuspendmux_0,
484 OMAP2_CONTROL_MSUSPENDMUX_0);
485 omap_ctrl_writel(control_context.msuspendmux_1,
486 OMAP2_CONTROL_MSUSPENDMUX_1);
487 omap_ctrl_writel(control_context.msuspendmux_2,
488 OMAP2_CONTROL_MSUSPENDMUX_2);
489 omap_ctrl_writel(control_context.msuspendmux_3,
490 OMAP2_CONTROL_MSUSPENDMUX_3);
491 omap_ctrl_writel(control_context.msuspendmux_4,
492 OMAP2_CONTROL_MSUSPENDMUX_4);
493 omap_ctrl_writel(control_context.msuspendmux_5,
494 OMAP2_CONTROL_MSUSPENDMUX_5);
495 omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
496 omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
497 omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
498 omap_ctrl_writel(control_context.iva2_bootaddr,
499 OMAP343X_CONTROL_IVA2_BOOTADDR);
500 omap_ctrl_writel(control_context.iva2_bootmod,
501 OMAP343X_CONTROL_IVA2_BOOTMOD);
502 omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
503 omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
504 omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
505 omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
506 omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
507 omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
508 omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
509 omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
510 omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
511 omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
512 omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
513 omap_ctrl_writel(control_context.dss_dpll_spreading,
514 OMAP343X_CONTROL_DSS_DPLL_SPREADING);
515 omap_ctrl_writel(control_context.core_dpll_spreading,
516 OMAP343X_CONTROL_CORE_DPLL_SPREADING);
517 omap_ctrl_writel(control_context.per_dpll_spreading,
518 OMAP343X_CONTROL_PER_DPLL_SPREADING);
519 omap_ctrl_writel(control_context.usbhost_dpll_spreading,
520 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
521 omap_ctrl_writel(control_context.pbias_lite,
522 OMAP343X_CONTROL_PBIAS_LITE);
523 omap_ctrl_writel(control_context.temp_sensor,
524 OMAP343X_CONTROL_TEMP_SENSOR);
525 omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
526 omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
527 omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
528 omap_ctrl_writel(control_context.padconf_sys_nirq,
529 OMAP343X_CONTROL_PADCONF_SYSNIRQ);
530 return;
531}
532
533void omap3630_ctrl_disable_rta(void)
534{
535 if (!cpu_is_omap3630())
536 return;
537 omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
538}
539
540/**
541 * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
542 *
543 * Tell the SCM to start saving the padconf registers, then wait for
544 * the process to complete. Returns 0 unconditionally, although it
545 * should also eventually be able to return -ETIMEDOUT, if the save
546 * does not complete.
547 *
548 * XXX This function is missing a timeout. What should it be?
549 */
550int omap3_ctrl_save_padconf(void)
551{
552 u32 cpo;
553
554 /* Save the padconf registers */
555 cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
556 cpo |= START_PADCONF_SAVE;
557 omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
558
559 /* wait for the save to complete */
560 while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
561 & PADCONF_SAVE_DONE))
562 udelay(1);
563
564 return 0;
565}
566
567#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */