1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * OMAP2/3 System Control Module register access
4 *
5 * Copyright (C) 2007, 2012 Texas Instruments, Inc.
6 * Copyright (C) 2007 Nokia Corporation
7 *
8 * Written by Paul Walmsley
9 */
10 #undef DEBUG
11
12 #include <linux/kernel.h>
13 #include <linux/io.h>
14 #include <linux/of_address.h>
15 #include <linux/regmap.h>
16 #include <linux/mfd/syscon.h>
17 #include <linux/cpu_pm.h>
18
19 #include "soc.h"
20 #include "iomap.h"
21 #include "common.h"
22 #include "cm-regbits-34xx.h"
23 #include "prm-regbits-34xx.h"
24 #include "prm3xxx.h"
25 #include "cm3xxx.h"
26 #include "sdrc.h"
27 #include "pm.h"
28 #include "control.h"
29 #include "clock.h"
30
31 /* Used by omap3_ctrl_save_padconf() */
32 #define START_PADCONF_SAVE 0x2
33 #define PADCONF_SAVE_DONE 0x1
34
35 static void __iomem *omap2_ctrl_base;
36 static s16 omap2_ctrl_offset;
37
38 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
39 struct 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
48 struct omap3_scratchpad_prcm_block {
49 u32 prm_contents[2];
50 u32 cm_contents[11];
51 u32 prcm_block_size;
52 };
53
54 struct omap3_scratchpad_sdrc_block {
55 u16 sysconfig;
56 u16 cs_cfg;
57 u16 sharing;
58 u16 err_type;
59 u32 dll_a_ctrl;
60 u32 dll_b_ctrl;
61 u32 power;
62 u32 cs_0;
63 u32 mcfg_0;
64 u16 mr_0;
65 u16 emr_1_0;
66 u16 emr_2_0;
67 u16 emr_3_0;
68 u32 actim_ctrla_0;
69 u32 actim_ctrlb_0;
70 u32 rfr_ctrl_0;
71 u32 cs_1;
72 u32 mcfg_1;
73 u16 mr_1;
74 u16 emr_1_1;
75 u16 emr_2_1;
76 u16 emr_3_1;
77 u32 actim_ctrla_1;
78 u32 actim_ctrlb_1;
79 u32 rfr_ctrl_1;
80 u16 dcdl_1_ctrl;
81 u16 dcdl_2_ctrl;
82 u32 flags;
83 u32 block_size;
84 };
85
86 void *omap3_secure_ram_storage;
87
88 /*
89 * This is used to store ARM registers in SDRAM before attempting
90 * an MPU OFF. The save and restore happens from the SRAM sleep code.
91 * The address is stored in scratchpad, so that it can be used
92 * during the restore path.
93 */
94 u32 omap3_arm_context[128];
95
96 struct omap3_control_regs {
97 u32 sysconfig;
98 u32 devconf0;
99 u32 mem_dftrw0;
100 u32 mem_dftrw1;
101 u32 msuspendmux_0;
102 u32 msuspendmux_1;
103 u32 msuspendmux_2;
104 u32 msuspendmux_3;
105 u32 msuspendmux_4;
106 u32 msuspendmux_5;
107 u32 sec_ctrl;
108 u32 devconf1;
109 u32 csirxfe;
110 u32 iva2_bootaddr;
111 u32 iva2_bootmod;
112 u32 wkup_ctrl;
113 u32 debobs_0;
114 u32 debobs_1;
115 u32 debobs_2;
116 u32 debobs_3;
117 u32 debobs_4;
118 u32 debobs_5;
119 u32 debobs_6;
120 u32 debobs_7;
121 u32 debobs_8;
122 u32 prog_io0;
123 u32 prog_io1;
124 u32 dss_dpll_spreading;
125 u32 core_dpll_spreading;
126 u32 per_dpll_spreading;
127 u32 usbhost_dpll_spreading;
128 u32 pbias_lite;
129 u32 temp_sensor;
130 u32 sramldo4;
131 u32 sramldo5;
132 u32 csi;
133 u32 padconf_sys_nirq;
134 };
135
136 static struct omap3_control_regs control_context;
137 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
138
139 u8 omap_ctrl_readb(u16 offset)
140 {
141 u32 val;
142 u8 byte_offset = offset & 0x3;
143
144 val = omap_ctrl_readl(offset);
145
146 return (val >> (byte_offset * 8)) & 0xff;
147 }
148
149 u16 omap_ctrl_readw(u16 offset)
150 {
151 u32 val;
152 u16 byte_offset = offset & 0x2;
153
154 val = omap_ctrl_readl(offset);
155
156 return (val >> (byte_offset * 8)) & 0xffff;
157 }
158
159 u32 omap_ctrl_readl(u16 offset)
160 {
161 offset &= 0xfffc;
162
163 return readl_relaxed(omap2_ctrl_base + offset);
164 }
165
166 void omap_ctrl_writeb(u8 val, u16 offset)
167 {
168 u32 tmp;
169 u8 byte_offset = offset & 0x3;
170
171 tmp = omap_ctrl_readl(offset);
172
173 tmp &= 0xffffffff ^ (0xff << (byte_offset * 8));
174 tmp |= val << (byte_offset * 8);
175
176 omap_ctrl_writel(tmp, offset);
177 }
178
179 void omap_ctrl_writew(u16 val, u16 offset)
180 {
181 u32 tmp;
182 u8 byte_offset = offset & 0x2;
183
184 tmp = omap_ctrl_readl(offset);
185
186 tmp &= 0xffffffff ^ (0xffff << (byte_offset * 8));
187 tmp |= val << (byte_offset * 8);
188
189 omap_ctrl_writel(tmp, offset);
190 }
191
192 void omap_ctrl_writel(u32 val, u16 offset)
193 {
194 offset &= 0xfffc;
195 writel_relaxed(val, omap2_ctrl_base + offset);
196 }
197
198 #ifdef CONFIG_ARCH_OMAP3
199
200 /**
201 * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
202 * @bootmode: 8-bit value to pass to some boot code
203 *
204 * Set the bootmode in the scratchpad RAM. This is used after the
205 * system restarts. Not sure what actually uses this - it may be the
206 * bootloader, rather than the boot ROM - contrary to the preserved
207 * comment below. No return value.
208 */
209 void omap3_ctrl_write_boot_mode(u8 bootmode)
210 {
211 u32 l;
212
213 l = ('B' << 24) | ('M' << 16) | bootmode;
214
215 /*
216 * Reserve the first word in scratchpad for communicating
217 * with the boot ROM. A pointer to a data structure
218 * describing the boot process can be stored there,
219 * cf. OMAP34xx TRM, Initialization / Software Booting
220 * Configuration.
221 *
222 * XXX This should use some omap_ctrl_writel()-type function
223 */
224 writel_relaxed(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
225 }
226
227 #endif
228
229 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
230 /* Populate the scratchpad structure with restore structure */
231 void omap3_save_scratchpad_contents(void)
232 {
233 void __iomem *scratchpad_address;
234 u32 arm_context_addr;
235 struct omap3_scratchpad scratchpad_contents;
236 struct omap3_scratchpad_prcm_block prcm_block_contents;
237 struct omap3_scratchpad_sdrc_block sdrc_block_contents;
238
239 /*
240 * Populate the Scratchpad contents
241 *
242 * The "get_*restore_pointer" functions are used to provide a
243 * physical restore address where the ROM code jumps while waking
244 * up from MPU OFF/OSWR state.
245 * The restore pointer is stored into the scratchpad.
246 */
247 scratchpad_contents.boot_config_ptr = 0x0;
248 if (cpu_is_omap3630())
249 scratchpad_contents.public_restore_ptr =
250 __pa_symbol(omap3_restore_3630);
251 else if (omap_rev() != OMAP3430_REV_ES3_0 &&
252 omap_rev() != OMAP3430_REV_ES3_1 &&
253 omap_rev() != OMAP3430_REV_ES3_1_2)
254 scratchpad_contents.public_restore_ptr =
255 __pa_symbol(omap3_restore);
256 else
257 scratchpad_contents.public_restore_ptr =
258 __pa_symbol(omap3_restore_es3);
259
260 if (omap_type() == OMAP2_DEVICE_TYPE_GP)
261 scratchpad_contents.secure_ram_restore_ptr = 0x0;
262 else
263 scratchpad_contents.secure_ram_restore_ptr =
264 (u32) __pa(omap3_secure_ram_storage);
265 scratchpad_contents.sdrc_module_semaphore = 0x0;
266 scratchpad_contents.prcm_block_offset = 0x2C;
267 scratchpad_contents.sdrc_block_offset = 0x64;
268
269 /* Populate the PRCM block contents */
270 omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents);
271 omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
272
273 prcm_block_contents.prcm_block_size = 0x0;
274
275 /* Populate the SDRC block contents */
276 sdrc_block_contents.sysconfig =
277 (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
278 sdrc_block_contents.cs_cfg =
279 (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
280 sdrc_block_contents.sharing =
281 (sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
282 sdrc_block_contents.err_type =
283 (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
284 sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
285 sdrc_block_contents.dll_b_ctrl = 0x0;
286 /*
287 * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
288 * be programed to issue automatic self refresh on timeout
289 * of AUTO_CNT = 1 prior to any transition to OFF mode.
290 */
291 if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
292 && (omap_rev() >= OMAP3430_REV_ES3_0))
293 sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
294 ~(SDRC_POWER_AUTOCOUNT_MASK|
295 SDRC_POWER_CLKCTRL_MASK)) |
296 (1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
297 SDRC_SELF_REFRESH_ON_AUTOCOUNT;
298 else
299 sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
300
301 sdrc_block_contents.cs_0 = 0x0;
302 sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
303 sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
304 sdrc_block_contents.emr_1_0 = 0x0;
305 sdrc_block_contents.emr_2_0 = 0x0;
306 sdrc_block_contents.emr_3_0 = 0x0;
307 sdrc_block_contents.actim_ctrla_0 =
308 sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
309 sdrc_block_contents.actim_ctrlb_0 =
310 sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
311 sdrc_block_contents.rfr_ctrl_0 =
312 sdrc_read_reg(SDRC_RFR_CTRL_0);
313 sdrc_block_contents.cs_1 = 0x0;
314 sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
315 sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
316 sdrc_block_contents.emr_1_1 = 0x0;
317 sdrc_block_contents.emr_2_1 = 0x0;
318 sdrc_block_contents.emr_3_1 = 0x0;
319 sdrc_block_contents.actim_ctrla_1 =
320 sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
321 sdrc_block_contents.actim_ctrlb_1 =
322 sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
323 sdrc_block_contents.rfr_ctrl_1 =
324 sdrc_read_reg(SDRC_RFR_CTRL_1);
325 sdrc_block_contents.dcdl_1_ctrl = 0x0;
326 sdrc_block_contents.dcdl_2_ctrl = 0x0;
327 sdrc_block_contents.flags = 0x0;
328 sdrc_block_contents.block_size = 0x0;
329
330 arm_context_addr = __pa_symbol(omap3_arm_context);
331
332 /* Copy all the contents to the scratchpad location */
333 scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
334 memcpy_toio(scratchpad_address, &scratchpad_contents,
335 sizeof(scratchpad_contents));
336 /* Scratchpad contents being 32 bits, a divide by 4 done here */
337 memcpy_toio(scratchpad_address +
338 scratchpad_contents.prcm_block_offset,
339 &prcm_block_contents, sizeof(prcm_block_contents));
340 memcpy_toio(scratchpad_address +
341 scratchpad_contents.sdrc_block_offset,
342 &sdrc_block_contents, sizeof(sdrc_block_contents));
343 /*
344 * Copies the address of the location in SDRAM where ARM
345 * registers get saved during a MPU OFF transition.
346 */
347 memcpy_toio(scratchpad_address +
348 scratchpad_contents.sdrc_block_offset +
349 sizeof(sdrc_block_contents), &arm_context_addr, 4);
350 }
351
352 void omap3_control_save_context(void)
353 {
354 control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
355 control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
356 control_context.mem_dftrw0 =
357 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
358 control_context.mem_dftrw1 =
359 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
360 control_context.msuspendmux_0 =
361 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
362 control_context.msuspendmux_1 =
363 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
364 control_context.msuspendmux_2 =
365 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
366 control_context.msuspendmux_3 =
367 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
368 control_context.msuspendmux_4 =
369 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
370 control_context.msuspendmux_5 =
371 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
372 control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
373 control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
374 control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
375 control_context.iva2_bootaddr =
376 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
377 control_context.iva2_bootmod =
378 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
379 control_context.wkup_ctrl = omap_ctrl_readl(OMAP34XX_CONTROL_WKUP_CTRL);
380 control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
381 control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
382 control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
383 control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
384 control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
385 control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
386 control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
387 control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
388 control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
389 control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
390 control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
391 control_context.dss_dpll_spreading =
392 omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
393 control_context.core_dpll_spreading =
394 omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
395 control_context.per_dpll_spreading =
396 omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
397 control_context.usbhost_dpll_spreading =
398 omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
399 control_context.pbias_lite =
400 omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
401 control_context.temp_sensor =
402 omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
403 control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
404 control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
405 control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
406 control_context.padconf_sys_nirq =
407 omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
408 }
409
410 void omap3_control_restore_context(void)
411 {
412 omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
413 omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
414 omap_ctrl_writel(control_context.mem_dftrw0,
415 OMAP343X_CONTROL_MEM_DFTRW0);
416 omap_ctrl_writel(control_context.mem_dftrw1,
417 OMAP343X_CONTROL_MEM_DFTRW1);
418 omap_ctrl_writel(control_context.msuspendmux_0,
419 OMAP2_CONTROL_MSUSPENDMUX_0);
420 omap_ctrl_writel(control_context.msuspendmux_1,
421 OMAP2_CONTROL_MSUSPENDMUX_1);
422 omap_ctrl_writel(control_context.msuspendmux_2,
423 OMAP2_CONTROL_MSUSPENDMUX_2);
424 omap_ctrl_writel(control_context.msuspendmux_3,
425 OMAP2_CONTROL_MSUSPENDMUX_3);
426 omap_ctrl_writel(control_context.msuspendmux_4,
427 OMAP2_CONTROL_MSUSPENDMUX_4);
428 omap_ctrl_writel(control_context.msuspendmux_5,
429 OMAP2_CONTROL_MSUSPENDMUX_5);
430 omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
431 omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
432 omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
433 omap_ctrl_writel(control_context.iva2_bootaddr,
434 OMAP343X_CONTROL_IVA2_BOOTADDR);
435 omap_ctrl_writel(control_context.iva2_bootmod,
436 OMAP343X_CONTROL_IVA2_BOOTMOD);
437 omap_ctrl_writel(control_context.wkup_ctrl, OMAP34XX_CONTROL_WKUP_CTRL);
438 omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
439 omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
440 omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
441 omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
442 omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
443 omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
444 omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
445 omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
446 omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
447 omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
448 omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
449 omap_ctrl_writel(control_context.dss_dpll_spreading,
450 OMAP343X_CONTROL_DSS_DPLL_SPREADING);
451 omap_ctrl_writel(control_context.core_dpll_spreading,
452 OMAP343X_CONTROL_CORE_DPLL_SPREADING);
453 omap_ctrl_writel(control_context.per_dpll_spreading,
454 OMAP343X_CONTROL_PER_DPLL_SPREADING);
455 omap_ctrl_writel(control_context.usbhost_dpll_spreading,
456 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
457 omap_ctrl_writel(control_context.pbias_lite,
458 OMAP343X_CONTROL_PBIAS_LITE);
459 omap_ctrl_writel(control_context.temp_sensor,
460 OMAP343X_CONTROL_TEMP_SENSOR);
461 omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
462 omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
463 omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
464 omap_ctrl_writel(control_context.padconf_sys_nirq,
465 OMAP343X_CONTROL_PADCONF_SYSNIRQ);
466 }
467
468 void omap3630_ctrl_disable_rta(void)
469 {
470 if (!cpu_is_omap3630())
471 return;
472 omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
473 }
474
475 /**
476 * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
477 *
478 * Tell the SCM to start saving the padconf registers, then wait for
479 * the process to complete. Returns 0 unconditionally, although it
480 * should also eventually be able to return -ETIMEDOUT, if the save
481 * does not complete.
482 *
483 * XXX This function is missing a timeout. What should it be?
484 */
485 int omap3_ctrl_save_padconf(void)
486 {
487 u32 cpo;
488
489 /* Save the padconf registers */
490 cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
491 cpo |= START_PADCONF_SAVE;
492 omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
493
494 /* wait for the save to complete */
495 while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
496 & PADCONF_SAVE_DONE))
497 udelay(1);
498
499 return 0;
500 }
501
502 /**
503 * omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
504 *
505 * Sets the bootmode for IVA2 to idle. This is needed by the PM code to
506 * force disable IVA2 so that it does not prevent any low-power states.
507 */
508 static void __init omap3_ctrl_set_iva_bootmode_idle(void)
509 {
510 omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
511 OMAP343X_CONTROL_IVA2_BOOTMOD);
512 }
513
514 /**
515 * omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle
516 *
517 * Sets up the pads controlling the stacked modem in such way that the
518 * device can enter idle.
519 */
520 static void __init omap3_ctrl_setup_d2d_padconf(void)
521 {
522 u16 mask, padconf;
523
524 /*
525 * In a stand alone OMAP3430 where there is not a stacked
526 * modem for the D2D Idle Ack and D2D MStandby must be pulled
527 * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
528 * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up.
529 */
530 mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
531 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
532 padconf |= mask;
533 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
534
535 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
536 padconf |= mask;
537 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
538 }
539
540 /**
541 * omap3_ctrl_init - does static initializations for control module
542 *
543 * Initializes system control module. This sets up the sysconfig autoidle,
544 * and sets up modem and iva2 so that they can be idled properly.
545 */
546 void __init omap3_ctrl_init(void)
547 {
548 omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
549
550 omap3_ctrl_set_iva_bootmode_idle();
551
552 omap3_ctrl_setup_d2d_padconf();
553 }
554 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
555
556 static unsigned long am43xx_control_reg_offsets[] = {
557 AM33XX_CONTROL_SYSCONFIG_OFFSET,
558 AM33XX_CONTROL_STATUS_OFFSET,
559 AM43XX_CONTROL_MPU_L2_CTRL_OFFSET,
560 AM33XX_CONTROL_CORE_SLDO_CTRL_OFFSET,
561 AM33XX_CONTROL_MPU_SLDO_CTRL_OFFSET,
562 AM33XX_CONTROL_CLK32KDIVRATIO_CTRL_OFFSET,
563 AM33XX_CONTROL_BANDGAP_CTRL_OFFSET,
564 AM33XX_CONTROL_BANDGAP_TRIM_OFFSET,
565 AM33XX_CONTROL_PLL_CLKINPULOW_CTRL_OFFSET,
566 AM33XX_CONTROL_MOSC_CTRL_OFFSET,
567 AM33XX_CONTROL_DEEPSLEEP_CTRL_OFFSET,
568 AM43XX_CONTROL_DISPLAY_PLL_SEL_OFFSET,
569 AM33XX_CONTROL_INIT_PRIORITY_0_OFFSET,
570 AM33XX_CONTROL_INIT_PRIORITY_1_OFFSET,
571 AM33XX_CONTROL_TPTC_CFG_OFFSET,
572 AM33XX_CONTROL_USB_CTRL0_OFFSET,
573 AM33XX_CONTROL_USB_CTRL1_OFFSET,
574 AM43XX_CONTROL_USB_CTRL2_OFFSET,
575 AM43XX_CONTROL_GMII_SEL_OFFSET,
576 AM43XX_CONTROL_MPUSS_CTRL_OFFSET,
577 AM43XX_CONTROL_TIMER_CASCADE_CTRL_OFFSET,
578 AM43XX_CONTROL_PWMSS_CTRL_OFFSET,
579 AM33XX_CONTROL_MREQPRIO_0_OFFSET,
580 AM33XX_CONTROL_MREQPRIO_1_OFFSET,
581 AM33XX_CONTROL_HW_EVENT_SEL_GRP1_OFFSET,
582 AM33XX_CONTROL_HW_EVENT_SEL_GRP2_OFFSET,
583 AM33XX_CONTROL_HW_EVENT_SEL_GRP3_OFFSET,
584 AM33XX_CONTROL_HW_EVENT_SEL_GRP4_OFFSET,
585 AM33XX_CONTROL_SMRT_CTRL_OFFSET,
586 AM33XX_CONTROL_MPUSS_HW_DEBUG_SEL_OFFSET,
587 AM43XX_CONTROL_CQDETECT_STS_OFFSET,
588 AM43XX_CONTROL_CQDETECT_STS2_OFFSET,
589 AM43XX_CONTROL_VTP_CTRL_OFFSET,
590 AM33XX_CONTROL_VREF_CTRL_OFFSET,
591 AM33XX_CONTROL_TPCC_EVT_MUX_0_3_OFFSET,
592 AM33XX_CONTROL_TPCC_EVT_MUX_4_7_OFFSET,
593 AM33XX_CONTROL_TPCC_EVT_MUX_8_11_OFFSET,
594 AM33XX_CONTROL_TPCC_EVT_MUX_12_15_OFFSET,
595 AM33XX_CONTROL_TPCC_EVT_MUX_16_19_OFFSET,
596 AM33XX_CONTROL_TPCC_EVT_MUX_20_23_OFFSET,
597 AM33XX_CONTROL_TPCC_EVT_MUX_24_27_OFFSET,
598 AM33XX_CONTROL_TPCC_EVT_MUX_28_31_OFFSET,
599 AM33XX_CONTROL_TPCC_EVT_MUX_32_35_OFFSET,
600 AM33XX_CONTROL_TPCC_EVT_MUX_36_39_OFFSET,
601 AM33XX_CONTROL_TPCC_EVT_MUX_40_43_OFFSET,
602 AM33XX_CONTROL_TPCC_EVT_MUX_44_47_OFFSET,
603 AM33XX_CONTROL_TPCC_EVT_MUX_48_51_OFFSET,
604 AM33XX_CONTROL_TPCC_EVT_MUX_52_55_OFFSET,
605 AM33XX_CONTROL_TPCC_EVT_MUX_56_59_OFFSET,
606 AM33XX_CONTROL_TPCC_EVT_MUX_60_63_OFFSET,
607 AM33XX_CONTROL_TIMER_EVT_CAPT_OFFSET,
608 AM33XX_CONTROL_ECAP_EVT_CAPT_OFFSET,
609 AM33XX_CONTROL_ADC_EVT_CAPT_OFFSET,
610 AM43XX_CONTROL_ADC1_EVT_CAPT_OFFSET,
611 AM33XX_CONTROL_RESET_ISO_OFFSET,
612 };
613
614 static u32 am33xx_control_vals[ARRAY_SIZE(am43xx_control_reg_offsets)];
615
616 /**
617 * am43xx_control_save_context - Save the wakeup domain registers
618 *
619 * Save the wkup domain registers
620 */
621 static void am43xx_control_save_context(void)
622 {
623 int i;
624
625 for (i = 0; i < ARRAY_SIZE(am43xx_control_reg_offsets); i++)
626 am33xx_control_vals[i] =
627 omap_ctrl_readl(am43xx_control_reg_offsets[i]);
628 }
629
630 /**
631 * am43xx_control_restore_context - Restore the wakeup domain registers
632 *
633 * Restore the wkup domain registers
634 */
635 static void am43xx_control_restore_context(void)
636 {
637 int i;
638
639 for (i = 0; i < ARRAY_SIZE(am43xx_control_reg_offsets); i++)
640 omap_ctrl_writel(am33xx_control_vals[i],
641 am43xx_control_reg_offsets[i]);
642 }
643
644 static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v)
645 {
646 switch (cmd) {
647 case CPU_CLUSTER_PM_ENTER:
648 if (enable_off_mode)
649 am43xx_control_save_context();
650 break;
651 case CPU_CLUSTER_PM_EXIT:
652 if (enable_off_mode)
653 am43xx_control_restore_context();
654 break;
655 }
656
657 return NOTIFY_OK;
658 }
659
660 struct control_init_data {
661 int index;
662 void __iomem *mem;
663 s16 offset;
664 };
665
666 static struct control_init_data ctrl_data = {
667 .index = TI_CLKM_CTRL,
668 };
669
670 static const struct control_init_data omap2_ctrl_data = {
671 .index = TI_CLKM_CTRL,
672 .offset = -OMAP2_CONTROL_GENERAL,
673 };
674
675 static const struct control_init_data ctrl_aux_data = {
676 .index = TI_CLKM_CTRL_AUX,
677 };
678
679 static const struct of_device_id omap_scrm_dt_match_table[] = {
680 { .compatible = "ti,am3-scm", .data = &ctrl_data },
681 { .compatible = "ti,am4-scm", .data = &ctrl_data },
682 { .compatible = "ti,omap2-scm", .data = &omap2_ctrl_data },
683 { .compatible = "ti,omap3-scm", .data = &omap2_ctrl_data },
684 { .compatible = "ti,dm814-scm", .data = &ctrl_data },
685 { .compatible = "ti,dm816-scrm", .data = &ctrl_data },
686 { .compatible = "ti,omap4-scm-core", .data = &ctrl_data },
687 { .compatible = "ti,omap5-scm-core", .data = &ctrl_data },
688 { .compatible = "ti,omap5-scm-wkup-pad-conf", .data = &ctrl_aux_data },
689 { .compatible = "ti,dra7-scm-core", .data = &ctrl_data },
690 { }
691 };
692
693 /**
694 * omap2_control_base_init - initialize iomappings for the control driver
695 *
696 * Detects and initializes the iomappings for the control driver, based
697 * on the DT data. Returns 0 in success, negative error value
698 * otherwise.
699 */
700 int __init omap2_control_base_init(void)
701 {
702 struct device_node *np;
703 const struct of_device_id *match;
704 struct control_init_data *data;
705 void __iomem *mem;
706
707 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
708 data = (struct control_init_data *)match->data;
709
710 mem = of_iomap(np, 0);
711 if (!mem) {
712 of_node_put(np);
713 return -ENOMEM;
714 }
715
716 if (data->index == TI_CLKM_CTRL) {
717 omap2_ctrl_base = mem;
718 omap2_ctrl_offset = data->offset;
719 }
720
721 data->mem = mem;
722 }
723
724 return 0;
725 }
726
727 /**
728 * omap_control_init - low level init for the control driver
729 *
730 * Initializes the low level clock infrastructure for control driver.
731 * Returns 0 in success, negative error value in failure.
732 */
733 int __init omap_control_init(void)
734 {
735 struct device_node *np, *scm_conf;
736 const struct of_device_id *match;
737 const struct omap_prcm_init_data *data;
738 int ret;
739 struct regmap *syscon;
740 static struct notifier_block nb;
741
742 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
743 data = match->data;
744
745 /*
746 * Check if we have scm_conf node, if yes, use this to
747 * access clock registers.
748 */
749 scm_conf = of_get_child_by_name(np, "scm_conf");
750
751 if (scm_conf) {
752 syscon = syscon_node_to_regmap(scm_conf);
753
754 if (IS_ERR(syscon)) {
755 ret = PTR_ERR(syscon);
756 goto of_node_put;
757 }
758
759 if (of_get_child_by_name(scm_conf, "clocks")) {
760 ret = omap2_clk_provider_init(scm_conf,
761 data->index,
762 syscon, NULL);
763 if (ret)
764 goto of_node_put;
765 }
766 } else {
767 /* No scm_conf found, direct access */
768 ret = omap2_clk_provider_init(np, data->index, NULL,
769 data->mem);
770 if (ret)
771 goto of_node_put;
772 }
773 }
774
775 /* Only AM43XX can lose ctrl registers context during rtc-ddr suspend */
776 if (soc_is_am43xx()) {
777 nb.notifier_call = cpu_notifier;
778 cpu_pm_register_notifier(&nb);
779 }
780
781 return 0;
782
783 of_node_put:
784 of_node_put(np);
785 return ret;
786
787 }
788
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