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 #include <linux/of_address.h>
18 #include <linux/regmap.h>
19 #include <linux/mfd/syscon.h>
20
21 #include "soc.h"
22 #include "iomap.h"
23 #include "common.h"
24 #include "cm-regbits-34xx.h"
25 #include "prm-regbits-34xx.h"
26 #include "prm3xxx.h"
27 #include "cm3xxx.h"
28 #include "sdrc.h"
29 #include "pm.h"
30 #include "control.h"
31 #include "clock.h"
32
33 /* Used by omap3_ctrl_save_padconf() */
34 #define START_PADCONF_SAVE 0x2
35 #define PADCONF_SAVE_DONE 0x1
36
37 static void __iomem *omap2_ctrl_base;
38 static s16 omap2_ctrl_offset;
39 static struct regmap *omap2_ctrl_syscon;
40
41 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
42 struct omap3_scratchpad {
43 u32 boot_config_ptr;
44 u32 public_restore_ptr;
45 u32 secure_ram_restore_ptr;
46 u32 sdrc_module_semaphore;
47 u32 prcm_block_offset;
48 u32 sdrc_block_offset;
49 };
50
51 struct omap3_scratchpad_prcm_block {
52 u32 prm_contents[2];
53 u32 cm_contents[11];
54 u32 prcm_block_size;
55 };
56
57 struct omap3_scratchpad_sdrc_block {
58 u16 sysconfig;
59 u16 cs_cfg;
60 u16 sharing;
61 u16 err_type;
62 u32 dll_a_ctrl;
63 u32 dll_b_ctrl;
64 u32 power;
65 u32 cs_0;
66 u32 mcfg_0;
67 u16 mr_0;
68 u16 emr_1_0;
69 u16 emr_2_0;
70 u16 emr_3_0;
71 u32 actim_ctrla_0;
72 u32 actim_ctrlb_0;
73 u32 rfr_ctrl_0;
74 u32 cs_1;
75 u32 mcfg_1;
76 u16 mr_1;
77 u16 emr_1_1;
78 u16 emr_2_1;
79 u16 emr_3_1;
80 u32 actim_ctrla_1;
81 u32 actim_ctrlb_1;
82 u32 rfr_ctrl_1;
83 u16 dcdl_1_ctrl;
84 u16 dcdl_2_ctrl;
85 u32 flags;
86 u32 block_size;
87 };
88
89 void *omap3_secure_ram_storage;
90
91 /*
92 * This is used to store ARM registers in SDRAM before attempting
93 * an MPU OFF. The save and restore happens from the SRAM sleep code.
94 * The address is stored in scratchpad, so that it can be used
95 * during the restore path.
96 */
97 u32 omap3_arm_context[128];
98
99 struct omap3_control_regs {
100 u32 sysconfig;
101 u32 devconf0;
102 u32 mem_dftrw0;
103 u32 mem_dftrw1;
104 u32 msuspendmux_0;
105 u32 msuspendmux_1;
106 u32 msuspendmux_2;
107 u32 msuspendmux_3;
108 u32 msuspendmux_4;
109 u32 msuspendmux_5;
110 u32 sec_ctrl;
111 u32 devconf1;
112 u32 csirxfe;
113 u32 iva2_bootaddr;
114 u32 iva2_bootmod;
115 u32 wkup_ctrl;
116 u32 debobs_0;
117 u32 debobs_1;
118 u32 debobs_2;
119 u32 debobs_3;
120 u32 debobs_4;
121 u32 debobs_5;
122 u32 debobs_6;
123 u32 debobs_7;
124 u32 debobs_8;
125 u32 prog_io0;
126 u32 prog_io1;
127 u32 dss_dpll_spreading;
128 u32 core_dpll_spreading;
129 u32 per_dpll_spreading;
130 u32 usbhost_dpll_spreading;
131 u32 pbias_lite;
132 u32 temp_sensor;
133 u32 sramldo4;
134 u32 sramldo5;
135 u32 csi;
136 u32 padconf_sys_nirq;
137 };
138
139 static struct omap3_control_regs control_context;
140 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
141
omap2_set_globals_control(void __iomem * ctrl)142 void __init omap2_set_globals_control(void __iomem *ctrl)
143 {
144 omap2_ctrl_base = ctrl;
145 }
146
omap_ctrl_readb(u16 offset)147 u8 omap_ctrl_readb(u16 offset)
148 {
149 u32 val;
150 u8 byte_offset = offset & 0x3;
151
152 val = omap_ctrl_readl(offset);
153
154 return (val >> (byte_offset * 8)) & 0xff;
155 }
156
omap_ctrl_readw(u16 offset)157 u16 omap_ctrl_readw(u16 offset)
158 {
159 u32 val;
160 u16 byte_offset = offset & 0x2;
161
162 val = omap_ctrl_readl(offset);
163
164 return (val >> (byte_offset * 8)) & 0xffff;
165 }
166
omap_ctrl_readl(u16 offset)167 u32 omap_ctrl_readl(u16 offset)
168 {
169 u32 val;
170
171 offset &= 0xfffc;
172 if (!omap2_ctrl_syscon)
173 val = readl_relaxed(omap2_ctrl_base + offset);
174 else
175 regmap_read(omap2_ctrl_syscon, omap2_ctrl_offset + offset,
176 &val);
177
178 return val;
179 }
180
omap_ctrl_writeb(u8 val,u16 offset)181 void omap_ctrl_writeb(u8 val, u16 offset)
182 {
183 u32 tmp;
184 u8 byte_offset = offset & 0x3;
185
186 tmp = omap_ctrl_readl(offset);
187
188 tmp &= 0xffffffff ^ (0xff << (byte_offset * 8));
189 tmp |= val << (byte_offset * 8);
190
191 omap_ctrl_writel(tmp, offset);
192 }
193
omap_ctrl_writew(u16 val,u16 offset)194 void omap_ctrl_writew(u16 val, u16 offset)
195 {
196 u32 tmp;
197 u8 byte_offset = offset & 0x2;
198
199 tmp = omap_ctrl_readl(offset);
200
201 tmp &= 0xffffffff ^ (0xffff << (byte_offset * 8));
202 tmp |= val << (byte_offset * 8);
203
204 omap_ctrl_writel(tmp, offset);
205 }
206
omap_ctrl_writel(u32 val,u16 offset)207 void omap_ctrl_writel(u32 val, u16 offset)
208 {
209 offset &= 0xfffc;
210 if (!omap2_ctrl_syscon)
211 writel_relaxed(val, omap2_ctrl_base + offset);
212 else
213 regmap_write(omap2_ctrl_syscon, omap2_ctrl_offset + offset,
214 val);
215 }
216
217 #ifdef CONFIG_ARCH_OMAP3
218
219 /**
220 * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
221 * @bootmode: 8-bit value to pass to some boot code
222 *
223 * Set the bootmode in the scratchpad RAM. This is used after the
224 * system restarts. Not sure what actually uses this - it may be the
225 * bootloader, rather than the boot ROM - contrary to the preserved
226 * comment below. No return value.
227 */
omap3_ctrl_write_boot_mode(u8 bootmode)228 void omap3_ctrl_write_boot_mode(u8 bootmode)
229 {
230 u32 l;
231
232 l = ('B' << 24) | ('M' << 16) | bootmode;
233
234 /*
235 * Reserve the first word in scratchpad for communicating
236 * with the boot ROM. A pointer to a data structure
237 * describing the boot process can be stored there,
238 * cf. OMAP34xx TRM, Initialization / Software Booting
239 * Configuration.
240 *
241 * XXX This should use some omap_ctrl_writel()-type function
242 */
243 writel_relaxed(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
244 }
245
246 #endif
247
248 /**
249 * omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor
250 * @bootaddr: physical address of the boot loader
251 *
252 * Set boot address for the boot loader of a supported processor
253 * when a power ON sequence occurs.
254 */
omap_ctrl_write_dsp_boot_addr(u32 bootaddr)255 void omap_ctrl_write_dsp_boot_addr(u32 bootaddr)
256 {
257 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR :
258 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR :
259 cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
260 soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
261 0;
262
263 if (!offset) {
264 pr_err("%s: unsupported omap type\n", __func__);
265 return;
266 }
267
268 omap_ctrl_writel(bootaddr, offset);
269 }
270
271 /**
272 * omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor
273 * @bootmode: 8-bit value to pass to some boot code
274 *
275 * Sets boot mode for the boot loader of a supported processor
276 * when a power ON sequence occurs.
277 */
omap_ctrl_write_dsp_boot_mode(u8 bootmode)278 void omap_ctrl_write_dsp_boot_mode(u8 bootmode)
279 {
280 u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD :
281 cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD :
282 0;
283
284 if (!offset) {
285 pr_err("%s: unsupported omap type\n", __func__);
286 return;
287 }
288
289 omap_ctrl_writel(bootmode, offset);
290 }
291
292 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
293 /*
294 * Clears the scratchpad contents in case of cold boot-
295 * called during bootup
296 */
omap3_clear_scratchpad_contents(void)297 void omap3_clear_scratchpad_contents(void)
298 {
299 u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET;
300 void __iomem *v_addr;
301 u32 offset = 0;
302
303 v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
304 if (omap3xxx_prm_clear_global_cold_reset()) {
305 for ( ; offset <= max_offset; offset += 0x4)
306 writel_relaxed(0x0, (v_addr + offset));
307 }
308 }
309
310 /* Populate the scratchpad structure with restore structure */
omap3_save_scratchpad_contents(void)311 void omap3_save_scratchpad_contents(void)
312 {
313 void __iomem *scratchpad_address;
314 u32 arm_context_addr;
315 struct omap3_scratchpad scratchpad_contents;
316 struct omap3_scratchpad_prcm_block prcm_block_contents;
317 struct omap3_scratchpad_sdrc_block sdrc_block_contents;
318
319 /*
320 * Populate the Scratchpad contents
321 *
322 * The "get_*restore_pointer" functions are used to provide a
323 * physical restore address where the ROM code jumps while waking
324 * up from MPU OFF/OSWR state.
325 * The restore pointer is stored into the scratchpad.
326 */
327 scratchpad_contents.boot_config_ptr = 0x0;
328 if (cpu_is_omap3630())
329 scratchpad_contents.public_restore_ptr =
330 virt_to_phys(omap3_restore_3630);
331 else if (omap_rev() != OMAP3430_REV_ES3_0 &&
332 omap_rev() != OMAP3430_REV_ES3_1 &&
333 omap_rev() != OMAP3430_REV_ES3_1_2)
334 scratchpad_contents.public_restore_ptr =
335 virt_to_phys(omap3_restore);
336 else
337 scratchpad_contents.public_restore_ptr =
338 virt_to_phys(omap3_restore_es3);
339
340 if (omap_type() == OMAP2_DEVICE_TYPE_GP)
341 scratchpad_contents.secure_ram_restore_ptr = 0x0;
342 else
343 scratchpad_contents.secure_ram_restore_ptr =
344 (u32) __pa(omap3_secure_ram_storage);
345 scratchpad_contents.sdrc_module_semaphore = 0x0;
346 scratchpad_contents.prcm_block_offset = 0x2C;
347 scratchpad_contents.sdrc_block_offset = 0x64;
348
349 /* Populate the PRCM block contents */
350 omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents);
351 omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
352
353 prcm_block_contents.prcm_block_size = 0x0;
354
355 /* Populate the SDRC block contents */
356 sdrc_block_contents.sysconfig =
357 (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
358 sdrc_block_contents.cs_cfg =
359 (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
360 sdrc_block_contents.sharing =
361 (sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
362 sdrc_block_contents.err_type =
363 (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
364 sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
365 sdrc_block_contents.dll_b_ctrl = 0x0;
366 /*
367 * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
368 * be programed to issue automatic self refresh on timeout
369 * of AUTO_CNT = 1 prior to any transition to OFF mode.
370 */
371 if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
372 && (omap_rev() >= OMAP3430_REV_ES3_0))
373 sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
374 ~(SDRC_POWER_AUTOCOUNT_MASK|
375 SDRC_POWER_CLKCTRL_MASK)) |
376 (1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
377 SDRC_SELF_REFRESH_ON_AUTOCOUNT;
378 else
379 sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
380
381 sdrc_block_contents.cs_0 = 0x0;
382 sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
383 sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
384 sdrc_block_contents.emr_1_0 = 0x0;
385 sdrc_block_contents.emr_2_0 = 0x0;
386 sdrc_block_contents.emr_3_0 = 0x0;
387 sdrc_block_contents.actim_ctrla_0 =
388 sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
389 sdrc_block_contents.actim_ctrlb_0 =
390 sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
391 sdrc_block_contents.rfr_ctrl_0 =
392 sdrc_read_reg(SDRC_RFR_CTRL_0);
393 sdrc_block_contents.cs_1 = 0x0;
394 sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
395 sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
396 sdrc_block_contents.emr_1_1 = 0x0;
397 sdrc_block_contents.emr_2_1 = 0x0;
398 sdrc_block_contents.emr_3_1 = 0x0;
399 sdrc_block_contents.actim_ctrla_1 =
400 sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
401 sdrc_block_contents.actim_ctrlb_1 =
402 sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
403 sdrc_block_contents.rfr_ctrl_1 =
404 sdrc_read_reg(SDRC_RFR_CTRL_1);
405 sdrc_block_contents.dcdl_1_ctrl = 0x0;
406 sdrc_block_contents.dcdl_2_ctrl = 0x0;
407 sdrc_block_contents.flags = 0x0;
408 sdrc_block_contents.block_size = 0x0;
409
410 arm_context_addr = virt_to_phys(omap3_arm_context);
411
412 /* Copy all the contents to the scratchpad location */
413 scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
414 memcpy_toio(scratchpad_address, &scratchpad_contents,
415 sizeof(scratchpad_contents));
416 /* Scratchpad contents being 32 bits, a divide by 4 done here */
417 memcpy_toio(scratchpad_address +
418 scratchpad_contents.prcm_block_offset,
419 &prcm_block_contents, sizeof(prcm_block_contents));
420 memcpy_toio(scratchpad_address +
421 scratchpad_contents.sdrc_block_offset,
422 &sdrc_block_contents, sizeof(sdrc_block_contents));
423 /*
424 * Copies the address of the location in SDRAM where ARM
425 * registers get saved during a MPU OFF transition.
426 */
427 memcpy_toio(scratchpad_address +
428 scratchpad_contents.sdrc_block_offset +
429 sizeof(sdrc_block_contents), &arm_context_addr, 4);
430 }
431
omap3_control_save_context(void)432 void omap3_control_save_context(void)
433 {
434 control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
435 control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
436 control_context.mem_dftrw0 =
437 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
438 control_context.mem_dftrw1 =
439 omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
440 control_context.msuspendmux_0 =
441 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
442 control_context.msuspendmux_1 =
443 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
444 control_context.msuspendmux_2 =
445 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
446 control_context.msuspendmux_3 =
447 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
448 control_context.msuspendmux_4 =
449 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
450 control_context.msuspendmux_5 =
451 omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
452 control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
453 control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
454 control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
455 control_context.iva2_bootaddr =
456 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
457 control_context.iva2_bootmod =
458 omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
459 control_context.wkup_ctrl = omap_ctrl_readl(OMAP34XX_CONTROL_WKUP_CTRL);
460 control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
461 control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
462 control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
463 control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
464 control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
465 control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
466 control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
467 control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
468 control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
469 control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
470 control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
471 control_context.dss_dpll_spreading =
472 omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
473 control_context.core_dpll_spreading =
474 omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
475 control_context.per_dpll_spreading =
476 omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
477 control_context.usbhost_dpll_spreading =
478 omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
479 control_context.pbias_lite =
480 omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
481 control_context.temp_sensor =
482 omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
483 control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
484 control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
485 control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
486 control_context.padconf_sys_nirq =
487 omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
488 }
489
omap3_control_restore_context(void)490 void omap3_control_restore_context(void)
491 {
492 omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
493 omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
494 omap_ctrl_writel(control_context.mem_dftrw0,
495 OMAP343X_CONTROL_MEM_DFTRW0);
496 omap_ctrl_writel(control_context.mem_dftrw1,
497 OMAP343X_CONTROL_MEM_DFTRW1);
498 omap_ctrl_writel(control_context.msuspendmux_0,
499 OMAP2_CONTROL_MSUSPENDMUX_0);
500 omap_ctrl_writel(control_context.msuspendmux_1,
501 OMAP2_CONTROL_MSUSPENDMUX_1);
502 omap_ctrl_writel(control_context.msuspendmux_2,
503 OMAP2_CONTROL_MSUSPENDMUX_2);
504 omap_ctrl_writel(control_context.msuspendmux_3,
505 OMAP2_CONTROL_MSUSPENDMUX_3);
506 omap_ctrl_writel(control_context.msuspendmux_4,
507 OMAP2_CONTROL_MSUSPENDMUX_4);
508 omap_ctrl_writel(control_context.msuspendmux_5,
509 OMAP2_CONTROL_MSUSPENDMUX_5);
510 omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
511 omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
512 omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
513 omap_ctrl_writel(control_context.iva2_bootaddr,
514 OMAP343X_CONTROL_IVA2_BOOTADDR);
515 omap_ctrl_writel(control_context.iva2_bootmod,
516 OMAP343X_CONTROL_IVA2_BOOTMOD);
517 omap_ctrl_writel(control_context.wkup_ctrl, OMAP34XX_CONTROL_WKUP_CTRL);
518 omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
519 omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
520 omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
521 omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
522 omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
523 omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
524 omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
525 omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
526 omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
527 omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
528 omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
529 omap_ctrl_writel(control_context.dss_dpll_spreading,
530 OMAP343X_CONTROL_DSS_DPLL_SPREADING);
531 omap_ctrl_writel(control_context.core_dpll_spreading,
532 OMAP343X_CONTROL_CORE_DPLL_SPREADING);
533 omap_ctrl_writel(control_context.per_dpll_spreading,
534 OMAP343X_CONTROL_PER_DPLL_SPREADING);
535 omap_ctrl_writel(control_context.usbhost_dpll_spreading,
536 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
537 omap_ctrl_writel(control_context.pbias_lite,
538 OMAP343X_CONTROL_PBIAS_LITE);
539 omap_ctrl_writel(control_context.temp_sensor,
540 OMAP343X_CONTROL_TEMP_SENSOR);
541 omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
542 omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
543 omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
544 omap_ctrl_writel(control_context.padconf_sys_nirq,
545 OMAP343X_CONTROL_PADCONF_SYSNIRQ);
546 }
547
omap3630_ctrl_disable_rta(void)548 void omap3630_ctrl_disable_rta(void)
549 {
550 if (!cpu_is_omap3630())
551 return;
552 omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
553 }
554
555 /**
556 * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
557 *
558 * Tell the SCM to start saving the padconf registers, then wait for
559 * the process to complete. Returns 0 unconditionally, although it
560 * should also eventually be able to return -ETIMEDOUT, if the save
561 * does not complete.
562 *
563 * XXX This function is missing a timeout. What should it be?
564 */
omap3_ctrl_save_padconf(void)565 int omap3_ctrl_save_padconf(void)
566 {
567 u32 cpo;
568
569 /* Save the padconf registers */
570 cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
571 cpo |= START_PADCONF_SAVE;
572 omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
573
574 /* wait for the save to complete */
575 while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
576 & PADCONF_SAVE_DONE))
577 udelay(1);
578
579 return 0;
580 }
581
582 /**
583 * omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
584 *
585 * Sets the bootmode for IVA2 to idle. This is needed by the PM code to
586 * force disable IVA2 so that it does not prevent any low-power states.
587 */
omap3_ctrl_set_iva_bootmode_idle(void)588 static void __init omap3_ctrl_set_iva_bootmode_idle(void)
589 {
590 omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
591 OMAP343X_CONTROL_IVA2_BOOTMOD);
592 }
593
594 /**
595 * omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle
596 *
597 * Sets up the pads controlling the stacked modem in such way that the
598 * device can enter idle.
599 */
omap3_ctrl_setup_d2d_padconf(void)600 static void __init omap3_ctrl_setup_d2d_padconf(void)
601 {
602 u16 mask, padconf;
603
604 /*
605 * In a stand alone OMAP3430 where there is not a stacked
606 * modem for the D2D Idle Ack and D2D MStandby must be pulled
607 * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
608 * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up.
609 */
610 mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
611 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
612 padconf |= mask;
613 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
614
615 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
616 padconf |= mask;
617 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
618 }
619
620 /**
621 * omap3_ctrl_init - does static initializations for control module
622 *
623 * Initializes system control module. This sets up the sysconfig autoidle,
624 * and sets up modem and iva2 so that they can be idled properly.
625 */
omap3_ctrl_init(void)626 void __init omap3_ctrl_init(void)
627 {
628 omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
629
630 omap3_ctrl_set_iva_bootmode_idle();
631
632 omap3_ctrl_setup_d2d_padconf();
633 }
634 #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
635
636 struct control_init_data {
637 int index;
638 s16 offset;
639 };
640
641 static struct control_init_data ctrl_data = {
642 .index = TI_CLKM_CTRL,
643 };
644
645 static const struct control_init_data omap2_ctrl_data = {
646 .index = TI_CLKM_CTRL,
647 .offset = -OMAP2_CONTROL_GENERAL,
648 };
649
650 static const struct of_device_id omap_scrm_dt_match_table[] = {
651 { .compatible = "ti,am3-scm", .data = &ctrl_data },
652 { .compatible = "ti,am4-scm", .data = &ctrl_data },
653 { .compatible = "ti,omap2-scm", .data = &omap2_ctrl_data },
654 { .compatible = "ti,omap3-scm", .data = &omap2_ctrl_data },
655 { .compatible = "ti,dm814-scm", .data = &ctrl_data },
656 { .compatible = "ti,dm816-scrm", .data = &ctrl_data },
657 { .compatible = "ti,omap4-scm-core", .data = &ctrl_data },
658 { .compatible = "ti,omap5-scm-core", .data = &ctrl_data },
659 { .compatible = "ti,dra7-scm-core", .data = &ctrl_data },
660 { }
661 };
662
663 /**
664 * omap2_control_base_init - initialize iomappings for the control driver
665 *
666 * Detects and initializes the iomappings for the control driver, based
667 * on the DT data. Returns 0 in success, negative error value
668 * otherwise.
669 */
omap2_control_base_init(void)670 int __init omap2_control_base_init(void)
671 {
672 struct device_node *np;
673 const struct of_device_id *match;
674 struct control_init_data *data;
675
676 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
677 data = (struct control_init_data *)match->data;
678
679 omap2_ctrl_base = of_iomap(np, 0);
680 if (!omap2_ctrl_base)
681 return -ENOMEM;
682
683 omap2_ctrl_offset = data->offset;
684 }
685
686 return 0;
687 }
688
689 /**
690 * omap_control_init - low level init for the control driver
691 *
692 * Initializes the low level clock infrastructure for control driver.
693 * Returns 0 in success, negative error value in failure.
694 */
omap_control_init(void)695 int __init omap_control_init(void)
696 {
697 struct device_node *np, *scm_conf;
698 const struct of_device_id *match;
699 const struct omap_prcm_init_data *data;
700 int ret;
701 struct regmap *syscon;
702
703 for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
704 data = match->data;
705
706 /*
707 * Check if we have scm_conf node, if yes, use this to
708 * access clock registers.
709 */
710 scm_conf = of_get_child_by_name(np, "scm_conf");
711
712 if (scm_conf) {
713 syscon = syscon_node_to_regmap(scm_conf);
714
715 if (IS_ERR(syscon))
716 return PTR_ERR(syscon);
717
718 omap2_ctrl_syscon = syscon;
719
720 if (of_get_child_by_name(scm_conf, "clocks")) {
721 ret = omap2_clk_provider_init(scm_conf,
722 data->index,
723 syscon, NULL);
724 if (ret)
725 return ret;
726 }
727
728 iounmap(omap2_ctrl_base);
729 omap2_ctrl_base = NULL;
730 } else {
731 /* No scm_conf found, direct access */
732 ret = omap2_clk_provider_init(np, data->index, NULL,
733 omap2_ctrl_base);
734 if (ret)
735 return ret;
736 }
737 }
738
739 return 0;
740 }
741
742 /**
743 * omap3_control_legacy_iomap_init - legacy iomap init for clock providers
744 *
745 * Legacy iomap init for clock provider. Needed only by legacy boot mode,
746 * where the base addresses are not parsed from DT, but still required
747 * by the clock driver to be setup properly.
748 */
omap3_control_legacy_iomap_init(void)749 void __init omap3_control_legacy_iomap_init(void)
750 {
751 omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap2_ctrl_base);
752 }
753