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
omap2_set_globals_control(void __iomem * ctrl)139 void __init omap2_set_globals_control(void __iomem *ctrl)
140 {
141 omap2_ctrl_base = ctrl;
142 }
143
omap_ctrl_readb(u16 offset)144 u8 omap_ctrl_readb(u16 offset)
145 {
146 u32 val;
147 u8 byte_offset = offset & 0x3;
148
149 val = omap_ctrl_readl(offset);
150
151 return (val >> (byte_offset * 8)) & 0xff;
152 }
153
omap_ctrl_readw(u16 offset)154 u16 omap_ctrl_readw(u16 offset)
155 {
156 u32 val;
157 u16 byte_offset = offset & 0x2;
158
159 val = omap_ctrl_readl(offset);
160
161 return (val >> (byte_offset * 8)) & 0xffff;
162 }
163
omap_ctrl_readl(u16 offset)164 u32 omap_ctrl_readl(u16 offset)
165 {
166 offset &= 0xfffc;
167
168 return readl_relaxed(omap2_ctrl_base + offset);
169 }
170
omap_ctrl_writeb(u8 val,u16 offset)171 void omap_ctrl_writeb(u8 val, u16 offset)
172 {
173 u32 tmp;
174 u8 byte_offset = offset & 0x3;
175
176 tmp = omap_ctrl_readl(offset);
177
178 tmp &= 0xffffffff ^ (0xff << (byte_offset * 8));
179 tmp |= val << (byte_offset * 8);
180
181 omap_ctrl_writel(tmp, offset);
182 }
183
omap_ctrl_writew(u16 val,u16 offset)184 void omap_ctrl_writew(u16 val, u16 offset)
185 {
186 u32 tmp;
187 u8 byte_offset = offset & 0x2;
188
189 tmp = omap_ctrl_readl(offset);
190
191 tmp &= 0xffffffff ^ (0xffff << (byte_offset * 8));
192 tmp |= val << (byte_offset * 8);
193
194 omap_ctrl_writel(tmp, offset);
195 }
196
omap_ctrl_writel(u32 val,u16 offset)197 void omap_ctrl_writel(u32 val, u16 offset)
198 {
199 offset &= 0xfffc;
200 writel_relaxed(val, omap2_ctrl_base + offset);
201 }
202
203 #ifdef CONFIG_ARCH_OMAP3
204
205 /**
206 * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
207 * @bootmode: 8-bit value to pass to some boot code
208 *
209 * Set the bootmode in the scratchpad RAM. This is used after the
210 * system restarts. Not sure what actually uses this - it may be the
211 * bootloader, rather than the boot ROM - contrary to the preserved
212 * comment below. No return value.
213 */
omap3_ctrl_write_boot_mode(u8 bootmode)214 void omap3_ctrl_write_boot_mode(u8 bootmode)
215 {
216 u32 l;
217
218 l = ('B' << 24) | ('M' << 16) | bootmode;
219
220 /*
221 * Reserve the first word in scratchpad for communicating
222 * with the boot ROM. A pointer to a data structure
223 * describing the boot process can be stored there,
224 * cf. OMAP34xx TRM, Initialization / Software Booting
225 * Configuration.
226 *
227 * XXX This should use some omap_ctrl_writel()-type function
228 */
229 writel_relaxed(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
230 }
231
232 #endif
233
234 /**
235 * omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor
236 * @bootaddr: physical address of the boot loader
237 *
238 * Set boot address for the boot loader of a supported processor
239 * when a power ON sequence occurs.
240 */
omap_ctrl_write_dsp_boot_addr(u32 bootaddr)241 void omap_ctrl_write_dsp_boot_addr(u32 bootaddr)
242 {
243 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR :
244 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR :
245 cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
246 soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
247 0;
248
249 if (!offset) {
250 pr_err("%s: unsupported omap type\n", __func__);
251 return;
252 }
253
254 omap_ctrl_writel(bootaddr, offset);
255 }
256
257 /**
258 * omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor
259 * @bootmode: 8-bit value to pass to some boot code
260 *
261 * Sets boot mode for the boot loader of a supported processor
262 * when a power ON sequence occurs.
263 */
omap_ctrl_write_dsp_boot_mode(u8 bootmode)264 void omap_ctrl_write_dsp_boot_mode(u8 bootmode)
265 {
266 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD :
267 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD :
268 0;
269
270 if (!offset) {
271 pr_err("%s: unsupported omap type\n", __func__);
272 return;
273 }
274
275 omap_ctrl_writel(bootmode, offset);
276 }
277
278 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
279 /*
280 * Clears the scratchpad contents in case of cold boot-
281 * called during bootup
282 */
omap3_clear_scratchpad_contents(void)283 void omap3_clear_scratchpad_contents(void)
284 {
285 u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET;
286 void __iomem *v_addr;
287 u32 offset = 0;
288
289 v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
290 if (omap3xxx_prm_clear_global_cold_reset()) {
291 for ( ; offset <= max_offset; offset += 0x4)
292 writel_relaxed(0x0, (v_addr + offset));
293 }
294 }
295
296 /* Populate the scratchpad structure with restore structure */
omap3_save_scratchpad_contents(void)297 void omap3_save_scratchpad_contents(void)
298 {
299 void __iomem *scratchpad_address;
300 u32 arm_context_addr;
301 struct omap3_scratchpad scratchpad_contents;
302 struct omap3_scratchpad_prcm_block prcm_block_contents;
303 struct omap3_scratchpad_sdrc_block sdrc_block_contents;
304
305 /*
306 * Populate the Scratchpad contents
307 *
308 * The "get_*restore_pointer" functions are used to provide a
309 * physical restore address where the ROM code jumps while waking
310 * up from MPU OFF/OSWR state.
311 * The restore pointer is stored into the scratchpad.
312 */
313 scratchpad_contents.boot_config_ptr = 0x0;
314 if (cpu_is_omap3630())
315 scratchpad_contents.public_restore_ptr =
316 __pa_symbol(omap3_restore_3630);
317 else if (omap_rev() != OMAP3430_REV_ES3_0 &&
318 omap_rev() != OMAP3430_REV_ES3_1 &&
319 omap_rev() != OMAP3430_REV_ES3_1_2)
320 scratchpad_contents.public_restore_ptr =
321 __pa_symbol(omap3_restore);
322 else
323 scratchpad_contents.public_restore_ptr =
324 __pa_symbol(omap3_restore_es3);
325
326 if (omap_type() == OMAP2_DEVICE_TYPE_GP)
327 scratchpad_contents.secure_ram_restore_ptr = 0x0;
328 else
329 scratchpad_contents.secure_ram_restore_ptr =
330 (u32) __pa(omap3_secure_ram_storage);
331 scratchpad_contents.sdrc_module_semaphore = 0x0;
332 scratchpad_contents.prcm_block_offset = 0x2C;
333 scratchpad_contents.sdrc_block_offset = 0x64;
334
335 /* Populate the PRCM block contents */
336 omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents);
337 omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
338
339 prcm_block_contents.prcm_block_size = 0x0;
340
341 /* Populate the SDRC block contents */
342 sdrc_block_contents.sysconfig =
343 (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
344 sdrc_block_contents.cs_cfg =
345 (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
346 sdrc_block_contents.sharing =
347 (sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
348 sdrc_block_contents.err_type =
349 (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
350 sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
351 sdrc_block_contents.dll_b_ctrl = 0x0;
352 /*
353 * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
354 * be programed to issue automatic self refresh on timeout
355 * of AUTO_CNT = 1 prior to any transition to OFF mode.
356 */
357 if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
358 && (omap_rev() >= OMAP3430_REV_ES3_0))
359 sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
360 ~(SDRC_POWER_AUTOCOUNT_MASK|
361 SDRC_POWER_CLKCTRL_MASK)) |
362 (1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
363 SDRC_SELF_REFRESH_ON_AUTOCOUNT;
364 else
365 sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
366
367 sdrc_block_contents.cs_0 = 0x0;
368 sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
369 sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
370 sdrc_block_contents.emr_1_0 = 0x0;
371 sdrc_block_contents.emr_2_0 = 0x0;
372 sdrc_block_contents.emr_3_0 = 0x0;
373 sdrc_block_contents.actim_ctrla_0 =
374 sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
375 sdrc_block_contents.actim_ctrlb_0 =
376 sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
377 sdrc_block_contents.rfr_ctrl_0 =
378 sdrc_read_reg(SDRC_RFR_CTRL_0);
379 sdrc_block_contents.cs_1 = 0x0;
380 sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
381 sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
382 sdrc_block_contents.emr_1_1 = 0x0;
383 sdrc_block_contents.emr_2_1 = 0x0;
384 sdrc_block_contents.emr_3_1 = 0x0;
385 sdrc_block_contents.actim_ctrla_1 =
386 sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
387 sdrc_block_contents.actim_ctrlb_1 =
388 sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
389 sdrc_block_contents.rfr_ctrl_1 =
390 sdrc_read_reg(SDRC_RFR_CTRL_1);
391 sdrc_block_contents.dcdl_1_ctrl = 0x0;
392 sdrc_block_contents.dcdl_2_ctrl = 0x0;
393 sdrc_block_contents.flags = 0x0;
394 sdrc_block_contents.block_size = 0x0;
395
396 arm_context_addr = __pa_symbol(omap3_arm_context);
397
398 /* Copy all the contents to the scratchpad location */
399 scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
400 memcpy_toio(scratchpad_address, &scratchpad_contents,
401 sizeof(scratchpad_contents));
402 /* Scratchpad contents being 32 bits, a divide by 4 done here */
403 memcpy_toio(scratchpad_address +
404 scratchpad_contents.prcm_block_offset,
405 &prcm_block_contents, sizeof(prcm_block_contents));
406 memcpy_toio(scratchpad_address +
407 scratchpad_contents.sdrc_block_offset,
408 &sdrc_block_contents, sizeof(sdrc_block_contents));
409 /*
410 * Copies the address of the location in SDRAM where ARM
411 * registers get saved during a MPU OFF transition.
412 */
413 memcpy_toio(scratchpad_address +
414 scratchpad_contents.sdrc_block_offset +
415 sizeof(sdrc_block_contents), &arm_context_addr, 4);
416 }
417
omap3_control_save_context(void)418 void omap3_control_save_context(void)
419 {
420 control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
421 control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
422 control_context.mem_dftrw0 =
423 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
424 control_context.mem_dftrw1 =
425 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
426 control_context.msuspendmux_0 =
427 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
428 control_context.msuspendmux_1 =
429 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
430 control_context.msuspendmux_2 =
431 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
432 control_context.msuspendmux_3 =
433 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
434 control_context.msuspendmux_4 =
435 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
436 control_context.msuspendmux_5 =
437 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
438 control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
439 control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
440 control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
441 control_context.iva2_bootaddr =
442 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
443 control_context.iva2_bootmod =
444 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
445 control_context.wkup_ctrl = omap_ctrl_readl(OMAP34XX_CONTROL_WKUP_CTRL);
446 control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
447 control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
448 control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
449 control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
450 control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
451 control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
452 control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
453 control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
454 control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
455 control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
456 control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
457 control_context.dss_dpll_spreading =
458 omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
459 control_context.core_dpll_spreading =
460 omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
461 control_context.per_dpll_spreading =
462 omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
463 control_context.usbhost_dpll_spreading =
464 omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
465 control_context.pbias_lite =
466 omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
467 control_context.temp_sensor =
468 omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
469 control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
470 control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
471 control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
472 control_context.padconf_sys_nirq =
473 omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
474 }
475
omap3_control_restore_context(void)476 void omap3_control_restore_context(void)
477 {
478 omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
479 omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
480 omap_ctrl_writel(control_context.mem_dftrw0,
481 OMAP343X_CONTROL_MEM_DFTRW0);
482 omap_ctrl_writel(control_context.mem_dftrw1,
483 OMAP343X_CONTROL_MEM_DFTRW1);
484 omap_ctrl_writel(control_context.msuspendmux_0,
485 OMAP2_CONTROL_MSUSPENDMUX_0);
486 omap_ctrl_writel(control_context.msuspendmux_1,
487 OMAP2_CONTROL_MSUSPENDMUX_1);
488 omap_ctrl_writel(control_context.msuspendmux_2,
489 OMAP2_CONTROL_MSUSPENDMUX_2);
490 omap_ctrl_writel(control_context.msuspendmux_3,
491 OMAP2_CONTROL_MSUSPENDMUX_3);
492 omap_ctrl_writel(control_context.msuspendmux_4,
493 OMAP2_CONTROL_MSUSPENDMUX_4);
494 omap_ctrl_writel(control_context.msuspendmux_5,
495 OMAP2_CONTROL_MSUSPENDMUX_5);
496 omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
497 omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
498 omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
499 omap_ctrl_writel(control_context.iva2_bootaddr,
500 OMAP343X_CONTROL_IVA2_BOOTADDR);
501 omap_ctrl_writel(control_context.iva2_bootmod,
502 OMAP343X_CONTROL_IVA2_BOOTMOD);
503 omap_ctrl_writel(control_context.wkup_ctrl, OMAP34XX_CONTROL_WKUP_CTRL);
504 omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
505 omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
506 omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
507 omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
508 omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
509 omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
510 omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
511 omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
512 omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
513 omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
514 omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
515 omap_ctrl_writel(control_context.dss_dpll_spreading,
516 OMAP343X_CONTROL_DSS_DPLL_SPREADING);
517 omap_ctrl_writel(control_context.core_dpll_spreading,
518 OMAP343X_CONTROL_CORE_DPLL_SPREADING);
519 omap_ctrl_writel(control_context.per_dpll_spreading,
520 OMAP343X_CONTROL_PER_DPLL_SPREADING);
521 omap_ctrl_writel(control_context.usbhost_dpll_spreading,
522 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
523 omap_ctrl_writel(control_context.pbias_lite,
524 OMAP343X_CONTROL_PBIAS_LITE);
525 omap_ctrl_writel(control_context.temp_sensor,
526 OMAP343X_CONTROL_TEMP_SENSOR);
527 omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
528 omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
529 omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
530 omap_ctrl_writel(control_context.padconf_sys_nirq,
531 OMAP343X_CONTROL_PADCONF_SYSNIRQ);
532 }
533
omap3630_ctrl_disable_rta(void)534 void omap3630_ctrl_disable_rta(void)
535 {
536 if (!cpu_is_omap3630())
537 return;
538 omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
539 }
540
541 /**
542 * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
543 *
544 * Tell the SCM to start saving the padconf registers, then wait for
545 * the process to complete. Returns 0 unconditionally, although it
546 * should also eventually be able to return -ETIMEDOUT, if the save
547 * does not complete.
548 *
549 * XXX This function is missing a timeout. What should it be?
550 */
omap3_ctrl_save_padconf(void)551 int omap3_ctrl_save_padconf(void)
552 {
553 u32 cpo;
554
555 /* Save the padconf registers */
556 cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
557 cpo |= START_PADCONF_SAVE;
558 omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
559
560 /* wait for the save to complete */
561 while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
562 & PADCONF_SAVE_DONE))
563 udelay(1);
564
565 return 0;
566 }
567
568 /**
569 * omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
570 *
571 * Sets the bootmode for IVA2 to idle. This is needed by the PM code to
572 * force disable IVA2 so that it does not prevent any low-power states.
573 */
omap3_ctrl_set_iva_bootmode_idle(void)574 static void __init omap3_ctrl_set_iva_bootmode_idle(void)
575 {
576 omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
577 OMAP343X_CONTROL_IVA2_BOOTMOD);
578 }
579
580 /**
581 * omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle
582 *
583 * Sets up the pads controlling the stacked modem in such way that the
584 * device can enter idle.
585 */
omap3_ctrl_setup_d2d_padconf(void)586 static void __init omap3_ctrl_setup_d2d_padconf(void)
587 {
588 u16 mask, padconf;
589
590 /*
591 * In a stand alone OMAP3430 where there is not a stacked
592 * modem for the D2D Idle Ack and D2D MStandby must be pulled
593 * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
594 * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up.
595 */
596 mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
597 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
598 padconf |= mask;
599 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
600
601 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
602 padconf |= mask;
603 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
604 }
605
606 /**
607 * omap3_ctrl_init - does static initializations for control module
608 *
609 * Initializes system control module. This sets up the sysconfig autoidle,
610 * and sets up modem and iva2 so that they can be idled properly.
611 */
omap3_ctrl_init(void)612 void __init omap3_ctrl_init(void)
613 {
614 omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
615
616 omap3_ctrl_set_iva_bootmode_idle();
617
618 omap3_ctrl_setup_d2d_padconf();
619 }
620 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
621
622 static unsigned long am43xx_control_reg_offsets[] = {
623 AM33XX_CONTROL_SYSCONFIG_OFFSET,
624 AM33XX_CONTROL_STATUS_OFFSET,
625 AM43XX_CONTROL_MPU_L2_CTRL_OFFSET,
626 AM33XX_CONTROL_CORE_SLDO_CTRL_OFFSET,
627 AM33XX_CONTROL_MPU_SLDO_CTRL_OFFSET,
628 AM33XX_CONTROL_CLK32KDIVRATIO_CTRL_OFFSET,
629 AM33XX_CONTROL_BANDGAP_CTRL_OFFSET,
630 AM33XX_CONTROL_BANDGAP_TRIM_OFFSET,
631 AM33XX_CONTROL_PLL_CLKINPULOW_CTRL_OFFSET,
632 AM33XX_CONTROL_MOSC_CTRL_OFFSET,
633 AM33XX_CONTROL_DEEPSLEEP_CTRL_OFFSET,
634 AM43XX_CONTROL_DISPLAY_PLL_SEL_OFFSET,
635 AM33XX_CONTROL_INIT_PRIORITY_0_OFFSET,
636 AM33XX_CONTROL_INIT_PRIORITY_1_OFFSET,
637 AM33XX_CONTROL_TPTC_CFG_OFFSET,
638 AM33XX_CONTROL_USB_CTRL0_OFFSET,
639 AM33XX_CONTROL_USB_CTRL1_OFFSET,
640 AM43XX_CONTROL_USB_CTRL2_OFFSET,
641 AM43XX_CONTROL_GMII_SEL_OFFSET,
642 AM43XX_CONTROL_MPUSS_CTRL_OFFSET,
643 AM43XX_CONTROL_TIMER_CASCADE_CTRL_OFFSET,
644 AM43XX_CONTROL_PWMSS_CTRL_OFFSET,
645 AM33XX_CONTROL_MREQPRIO_0_OFFSET,
646 AM33XX_CONTROL_MREQPRIO_1_OFFSET,
647 AM33XX_CONTROL_HW_EVENT_SEL_GRP1_OFFSET,
648 AM33XX_CONTROL_HW_EVENT_SEL_GRP2_OFFSET,
649 AM33XX_CONTROL_HW_EVENT_SEL_GRP3_OFFSET,
650 AM33XX_CONTROL_HW_EVENT_SEL_GRP4_OFFSET,
651 AM33XX_CONTROL_SMRT_CTRL_OFFSET,
652 AM33XX_CONTROL_MPUSS_HW_DEBUG_SEL_OFFSET,
653 AM43XX_CONTROL_CQDETECT_STS_OFFSET,
654 AM43XX_CONTROL_CQDETECT_STS2_OFFSET,
655 AM43XX_CONTROL_VTP_CTRL_OFFSET,
656 AM33XX_CONTROL_VREF_CTRL_OFFSET,
657 AM33XX_CONTROL_TPCC_EVT_MUX_0_3_OFFSET,
658 AM33XX_CONTROL_TPCC_EVT_MUX_4_7_OFFSET,
659 AM33XX_CONTROL_TPCC_EVT_MUX_8_11_OFFSET,
660 AM33XX_CONTROL_TPCC_EVT_MUX_12_15_OFFSET,
661 AM33XX_CONTROL_TPCC_EVT_MUX_16_19_OFFSET,
662 AM33XX_CONTROL_TPCC_EVT_MUX_20_23_OFFSET,
663 AM33XX_CONTROL_TPCC_EVT_MUX_24_27_OFFSET,
664 AM33XX_CONTROL_TPCC_EVT_MUX_28_31_OFFSET,
665 AM33XX_CONTROL_TPCC_EVT_MUX_32_35_OFFSET,
666 AM33XX_CONTROL_TPCC_EVT_MUX_36_39_OFFSET,
667 AM33XX_CONTROL_TPCC_EVT_MUX_40_43_OFFSET,
668 AM33XX_CONTROL_TPCC_EVT_MUX_44_47_OFFSET,
669 AM33XX_CONTROL_TPCC_EVT_MUX_48_51_OFFSET,
670 AM33XX_CONTROL_TPCC_EVT_MUX_52_55_OFFSET,
671 AM33XX_CONTROL_TPCC_EVT_MUX_56_59_OFFSET,
672 AM33XX_CONTROL_TPCC_EVT_MUX_60_63_OFFSET,
673 AM33XX_CONTROL_TIMER_EVT_CAPT_OFFSET,
674 AM33XX_CONTROL_ECAP_EVT_CAPT_OFFSET,
675 AM33XX_CONTROL_ADC_EVT_CAPT_OFFSET,
676 AM43XX_CONTROL_ADC1_EVT_CAPT_OFFSET,
677 AM33XX_CONTROL_RESET_ISO_OFFSET,
678 };
679
680 static u32 am33xx_control_vals[ARRAY_SIZE(am43xx_control_reg_offsets)];
681
682 /**
683 * am43xx_control_save_context - Save the wakeup domain registers
684 *
685 * Save the wkup domain registers
686 */
am43xx_control_save_context(void)687 static void am43xx_control_save_context(void)
688 {
689 int i;
690
691 for (i = 0; i < ARRAY_SIZE(am43xx_control_reg_offsets); i++)
692 am33xx_control_vals[i] =
693 omap_ctrl_readl(am43xx_control_reg_offsets[i]);
694 }
695
696 /**
697 * am43xx_control_restore_context - Restore the wakeup domain registers
698 *
699 * Restore the wkup domain registers
700 */
am43xx_control_restore_context(void)701 static void am43xx_control_restore_context(void)
702 {
703 int i;
704
705 for (i = 0; i < ARRAY_SIZE(am43xx_control_reg_offsets); i++)
706 omap_ctrl_writel(am33xx_control_vals[i],
707 am43xx_control_reg_offsets[i]);
708 }
709
cpu_notifier(struct notifier_block * nb,unsigned long cmd,void * v)710 static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v)
711 {
712 switch (cmd) {
713 case CPU_CLUSTER_PM_ENTER:
714 if (enable_off_mode)
715 am43xx_control_save_context();
716 break;
717 case CPU_CLUSTER_PM_EXIT:
718 if (enable_off_mode)
719 am43xx_control_restore_context();
720 break;
721 }
722
723 return NOTIFY_OK;
724 }
725
726 struct control_init_data {
727 int index;
728 void __iomem *mem;
729 s16 offset;
730 };
731
732 static struct control_init_data ctrl_data = {
733 .index = TI_CLKM_CTRL,
734 };
735
736 static const struct control_init_data omap2_ctrl_data = {
737 .index = TI_CLKM_CTRL,
738 .offset = -OMAP2_CONTROL_GENERAL,
739 };
740
741 static const struct control_init_data ctrl_aux_data = {
742 .index = TI_CLKM_CTRL_AUX,
743 };
744
745 static const struct of_device_id omap_scrm_dt_match_table[] = {
746 { .compatible = "ti,am3-scm", .data = &ctrl_data },
747 { .compatible = "ti,am4-scm", .data = &ctrl_data },
748 { .compatible = "ti,omap2-scm", .data = &omap2_ctrl_data },
749 { .compatible = "ti,omap3-scm", .data = &omap2_ctrl_data },
750 { .compatible = "ti,dm814-scm", .data = &ctrl_data },
751 { .compatible = "ti,dm816-scrm", .data = &ctrl_data },
752 { .compatible = "ti,omap4-scm-core", .data = &ctrl_data },
753 { .compatible = "ti,omap5-scm-core", .data = &ctrl_data },
754 { .compatible = "ti,omap5-scm-wkup-pad-conf", .data = &ctrl_aux_data },
755 { .compatible = "ti,dra7-scm-core", .data = &ctrl_data },
756 { }
757 };
758
759 /**
760 * omap2_control_base_init - initialize iomappings for the control driver
761 *
762 * Detects and initializes the iomappings for the control driver, based
763 * on the DT data. Returns 0 in success, negative error value
764 * otherwise.
765 */
omap2_control_base_init(void)766 int __init omap2_control_base_init(void)
767 {
768 struct device_node *np;
769 const struct of_device_id *match;
770 struct control_init_data *data;
771 void __iomem *mem;
772
773 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
774 data = (struct control_init_data *)match->data;
775
776 mem = of_iomap(np, 0);
777 if (!mem)
778 return -ENOMEM;
779
780 if (data->index == TI_CLKM_CTRL) {
781 omap2_ctrl_base = mem;
782 omap2_ctrl_offset = data->offset;
783 }
784
785 data->mem = mem;
786 }
787
788 return 0;
789 }
790
791 /**
792 * omap_control_init - low level init for the control driver
793 *
794 * Initializes the low level clock infrastructure for control driver.
795 * Returns 0 in success, negative error value in failure.
796 */
omap_control_init(void)797 int __init omap_control_init(void)
798 {
799 struct device_node *np, *scm_conf;
800 const struct of_device_id *match;
801 const struct omap_prcm_init_data *data;
802 int ret;
803 struct regmap *syscon;
804 static struct notifier_block nb;
805
806 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
807 data = match->data;
808
809 /*
810 * Check if we have scm_conf node, if yes, use this to
811 * access clock registers.
812 */
813 scm_conf = of_get_child_by_name(np, "scm_conf");
814
815 if (scm_conf) {
816 syscon = syscon_node_to_regmap(scm_conf);
817
818 if (IS_ERR(syscon))
819 return PTR_ERR(syscon);
820
821 if (of_get_child_by_name(scm_conf, "clocks")) {
822 ret = omap2_clk_provider_init(scm_conf,
823 data->index,
824 syscon, NULL);
825 if (ret)
826 return ret;
827 }
828 } else {
829 /* No scm_conf found, direct access */
830 ret = omap2_clk_provider_init(np, data->index, NULL,
831 data->mem);
832 if (ret)
833 return ret;
834 }
835 }
836
837 /* Only AM43XX can lose ctrl registers context during rtc-ddr suspend */
838 if (soc_is_am43xx()) {
839 nb.notifier_call = cpu_notifier;
840 cpu_pm_register_notifier(&nb);
841 }
842
843 return 0;
844 }
845
846 /**
847 * omap3_control_legacy_iomap_init - legacy iomap init for clock providers
848 *
849 * Legacy iomap init for clock provider. Needed only by legacy boot mode,
850 * where the base addresses are not parsed from DT, but still required
851 * by the clock driver to be setup properly.
852 */
omap3_control_legacy_iomap_init(void)853 void __init omap3_control_legacy_iomap_init(void)
854 {
855 omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap2_ctrl_base);
856 }
857