| blob | aab884fecc55c673aa28407666676756e870c47e |
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
15 #include <linux/kernel.h>
16 #include <linux/io.h>
18 #include <plat/common.h>
19 #include <plat/sdrc.h>
29 /* Used by omap3_ctrl_save_padconf() */
30 #define START_PADCONF_SAVE 0x2
31 #define PADCONF_SAVE_DONE 0x1
36 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
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 };
47 u32 prm_clksrc_ctrl;
48 u32 prm_clksel;
49 u32 cm_clksel_core;
50 u32 cm_clksel_wkup;
51 u32 cm_clken_pll;
52 u32 cm_autoidle_pll;
53 u32 cm_clksel1_pll;
54 u32 cm_clksel2_pll;
55 u32 cm_clksel3_pll;
56 u32 cm_clken_pll_mpu;
57 u32 cm_autoidle_pll_mpu;
58 u32 cm_clksel1_pll_mpu;
59 u32 cm_clksel2_pll_mpu;
60 u32 prcm_block_size;
61 };
64 u16 sysconfig;
65 u16 cs_cfg;
66 u16 sharing;
67 u16 err_type;
68 u32 dll_a_ctrl;
69 u32 dll_b_ctrl;
70 u32 power;
71 u32 cs_0;
72 u32 mcfg_0;
73 u16 mr_0;
74 u16 emr_1_0;
75 u16 emr_2_0;
76 u16 emr_3_0;
77 u32 actim_ctrla_0;
78 u32 actim_ctrlb_0;
79 u32 rfr_ctrl_0;
80 u32 cs_1;
81 u32 mcfg_1;
82 u16 mr_1;
83 u16 emr_1_1;
84 u16 emr_2_1;
85 u16 emr_3_1;
86 u32 actim_ctrla_1;
87 u32 actim_ctrlb_1;
88 u32 rfr_ctrl_1;
89 u16 dcdl_1_ctrl;
90 u16 dcdl_2_ctrl;
91 u32 flags;
92 u32 block_size;
93 };
97 /*
98 * This is used to store ARM registers in SDRAM before attempting
99 * an MPU OFF. The save and restore happens from the SRAM sleep code.
100 * The address is stored in scratchpad, so that it can be used
101 * during the restore path.
102 */
106 u32 sysconfig;
107 u32 devconf0;
108 u32 mem_dftrw0;
109 u32 mem_dftrw1;
110 u32 msuspendmux_0;
111 u32 msuspendmux_1;
112 u32 msuspendmux_2;
113 u32 msuspendmux_3;
114 u32 msuspendmux_4;
115 u32 msuspendmux_5;
116 u32 sec_ctrl;
117 u32 devconf1;
118 u32 csirxfe;
119 u32 iva2_bootaddr;
120 u32 iva2_bootmod;
121 u32 debobs_0;
122 u32 debobs_1;
123 u32 debobs_2;
124 u32 debobs_3;
125 u32 debobs_4;
126 u32 debobs_5;
127 u32 debobs_6;
128 u32 debobs_7;
129 u32 debobs_8;
130 u32 prog_io0;
131 u32 prog_io1;
132 u32 dss_dpll_spreading;
133 u32 core_dpll_spreading;
134 u32 per_dpll_spreading;
135 u32 usbhost_dpll_spreading;
136 u32 pbias_lite;
137 u32 temp_sensor;
138 u32 sramldo4;
139 u32 sramldo5;
140 u32 csi;
141 u32 padconf_sys_nirq;
142 };
147 #define OMAP_CTRL_REGADDR(reg) (omap2_ctrl_base + (reg))
148 #define OMAP4_CTRL_PAD_REGADDR(reg) (omap4_ctrl_pad_base + (reg))
151 {
152 /* Static mapping, never released */
156 }
158 /* Static mapping, never released */
162 }
163 }
166 {
168 }
171 {
173 }
176 {
178 }
181 {
183 }
186 {
188 }
191 {
193 }
196 {
198 }
200 /*
201 * On OMAP4 control pad are not addressable from control
202 * core base. So the common omap_ctrl_read/write APIs breaks
203 * Hence export separate APIs to manage the omap4 pad control
204 * registers. This APIs will work only for OMAP4
205 */
208 {
210 }
213 {
215 }
217 #ifdef CONFIG_ARCH_OMAP3
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 */
229 {
230 u32 l;
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 */
244 }
246 #endif
248 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
249 /*
250 * Clears the scratchpad contents in case of cold boot-
251 * called during bootup
252 */
254 {
260 OMAP3430_GLOBAL_COLD_RST_MASK) {
264 OMAP3430_GR_MOD,
265 OMAP3_PRM_RSTST_OFFSET);
266 }
267 }
269 /* Populate the scratchpad structure with restore structure */
271 {
273 u32 arm_context_addr;
278 /*
279 * Populate the Scratchpad contents
280 *
281 * The "get_*restore_pointer" functions are used to provide a
282 * physical restore address where the ROM code jumps while waking
283 * up from MPU OFF/OSWR state.
284 * The restore pointer is stored into the scratchpad.
285 */
294 else
300 else
307 /* Populate the PRCM block contents */
310 OMAP3_PRM_CLKSRC_CTRL_OFFSET);
313 OMAP3_PRM_CLKSEL_OFFSET);
320 /*
321 * As per erratum i671, ROM code does not respect the PER DPLL
322 * programming scheme if CM_AUTOIDLE_PLL..AUTO_PERIPH_DPLL == 1.
323 * Then, in anycase, clear these bits to avoid extra latencies.
324 */
344 /* Populate the SDRC block contents */
355 /*
356 * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
357 * be programed to issue automatic self refresh on timeout
358 * of AUTO_CNT = 1 prior to any transition to OFF mode.
359 */
364 SDRC_POWER_CLKCTRL_MASK)) |
366 SDRC_SELF_REFRESH_ON_AUTOCOUNT;
367 else
401 /* Copy all the contents to the scratchpad location */
405 /* Scratchpad contents being 32 bits, a divide by 4 done here */
412 /*
413 * Copies the address of the location in SDRAM where ARM
414 * registers get saved during a MPU OFF transition.
415 */
419 }
422 {
477 }
480 {
484 OMAP343X_CONTROL_MEM_DFTRW0);
486 OMAP343X_CONTROL_MEM_DFTRW1);
488 OMAP2_CONTROL_MSUSPENDMUX_0);
490 OMAP2_CONTROL_MSUSPENDMUX_1);
492 OMAP2_CONTROL_MSUSPENDMUX_2);
494 OMAP2_CONTROL_MSUSPENDMUX_3);
496 OMAP2_CONTROL_MSUSPENDMUX_4);
498 OMAP2_CONTROL_MSUSPENDMUX_5);
503 OMAP343X_CONTROL_IVA2_BOOTADDR);
505 OMAP343X_CONTROL_IVA2_BOOTMOD);
518 OMAP343X_CONTROL_DSS_DPLL_SPREADING);
520 OMAP343X_CONTROL_CORE_DPLL_SPREADING);
522 OMAP343X_CONTROL_PER_DPLL_SPREADING);
524 OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
526 OMAP343X_CONTROL_PBIAS_LITE);
528 OMAP343X_CONTROL_TEMP_SENSOR);
533 OMAP343X_CONTROL_PADCONF_SYSNIRQ);
535 }
538 {
542 }
544 /**
545 * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
546 *
547 * Tell the SCM to start saving the padconf registers, then wait for
548 * the process to complete. Returns 0 unconditionally, although it
549 * should also eventually be able to return -ETIMEDOUT, if the save
550 * does not complete.
551 *
552 * XXX This function is missing a timeout. What should it be?
553 */
555 {
556 u32 cpo;
558 /* Save the padconf registers */
563 /* wait for the save to complete */
569 }