projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 49815399 PW |
1 | /* |
| 2 | * OMAP2xxx PRM module functions | |
| 3 | * | |
| 4 | * Copyright (C) 2010-2012 Texas Instruments, Inc. | |
| 5 | * Copyright (C) 2010 Nokia Corporation | |
| 6 | * Benoît Cousson | |
| 7 | * Paul Walmsley | |
| 8 | * Rajendra Nayak <rnayak@ti.com> | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License version 2 as | |
| 12 | * published by the Free Software Foundation. | |
| 13 | */ | |
| 14 | ||
| 15 | #include <linux/kernel.h> | |
| 16 | #include <linux/errno.h> | |
| 17 | #include <linux/err.h> | |
| 18 | #include <linux/io.h> | |
| 19 | #include <linux/irq.h> | |
| 20 | ||
| 21 | #include "common.h" | |
| 22 | #include <plat/cpu.h> | |
| 23 | #include <plat/prcm.h> | |
| 24 | ||
| 25 | #include "vp.h" | |
| 26 | #include "powerdomain.h" | |
| 4bd5259e | 27 | #include "clockdomain.h" |
| 49815399 PW |
28 | #include "prm2xxx.h" |
| 29 | #include "cm2xxx_3xxx.h" | |
| 30 | #include "prm-regbits-24xx.h" | |
| 31 | ||
| 2bb2a5d3 PW |
32 | /* |
| 33 | * omap2xxx_prm_reset_src_map - map from bits in the PRM_RSTST_WKUP | |
| 34 | * hardware register (which are specific to the OMAP2xxx SoCs) to | |
| 35 | * reset source ID bit shifts (which is an OMAP SoC-independent | |
| 36 | * enumeration) | |
| 37 | */ | |
| 38 | static struct prm_reset_src_map omap2xxx_prm_reset_src_map[] = { | |
| 39 | { OMAP_GLOBALCOLD_RST_SHIFT, OMAP_GLOBAL_COLD_RST_SRC_ID_SHIFT }, | |
| 40 | { OMAP_GLOBALWARM_RST_SHIFT, OMAP_GLOBAL_WARM_RST_SRC_ID_SHIFT }, | |
| 41 | { OMAP24XX_SECU_VIOL_RST_SHIFT, OMAP_SECU_VIOL_RST_SRC_ID_SHIFT }, | |
| 42 | { OMAP24XX_MPU_WD_RST_SHIFT, OMAP_MPU_WD_RST_SRC_ID_SHIFT }, | |
| 43 | { OMAP24XX_SECU_WD_RST_SHIFT, OMAP_SECU_WD_RST_SRC_ID_SHIFT }, | |
| 44 | { OMAP24XX_EXTWMPU_RST_SHIFT, OMAP_EXTWARM_RST_SRC_ID_SHIFT }, | |
| 45 | { -1, -1 }, | |
| 46 | }; | |
| 47 | ||
| 48 | /** | |
| 49 | * omap2xxx_prm_read_reset_sources - return the last SoC reset source | |
| 50 | * | |
| 51 | * Return a u32 representing the last reset sources of the SoC. The | |
| 52 | * returned reset source bits are standardized across OMAP SoCs. | |
| 53 | */ | |
| 54 | static u32 omap2xxx_prm_read_reset_sources(void) | |
| 55 | { | |
| 56 | struct prm_reset_src_map *p; | |
| 57 | u32 r = 0; | |
| 58 | u32 v; | |
| 59 | ||
| 60 | v = omap2_prm_read_mod_reg(WKUP_MOD, OMAP2_RM_RSTST); | |
| 61 | ||
| 62 | p = omap2xxx_prm_reset_src_map; | |
| 63 | while (p->reg_shift >= 0 && p->std_shift >= 0) { | |
| 64 | if (v & (1 << p->reg_shift)) | |
| 65 | r |= 1 << p->std_shift; | |
| 66 | p++; | |
| 67 | } | |
| 68 | ||
| 69 | return r; | |
| 70 | } | |
| 71 | ||
| 4bd5259e PW |
72 | int omap2xxx_clkdm_sleep(struct clockdomain *clkdm) |
| 73 | { | |
| 74 | omap2_prm_set_mod_reg_bits(OMAP24XX_FORCESTATE_MASK, | |
| 75 | clkdm->pwrdm.ptr->prcm_offs, | |
| 76 | OMAP2_PM_PWSTCTRL); | |
| 77 | return 0; | |
| 78 | } | |
| 79 | ||
| 80 | int omap2xxx_clkdm_wakeup(struct clockdomain *clkdm) | |
| 81 | { | |
| 82 | omap2_prm_clear_mod_reg_bits(OMAP24XX_FORCESTATE_MASK, | |
| 83 | clkdm->pwrdm.ptr->prcm_offs, | |
| 84 | OMAP2_PM_PWSTCTRL); | |
| 85 | return 0; | |
| 86 | } | |
| 87 | ||
| 49815399 PW |
88 | struct pwrdm_ops omap2_pwrdm_operations = { |
| 89 | .pwrdm_set_next_pwrst = omap2_pwrdm_set_next_pwrst, | |
| 90 | .pwrdm_read_next_pwrst = omap2_pwrdm_read_next_pwrst, | |
| 91 | .pwrdm_read_pwrst = omap2_pwrdm_read_pwrst, | |
| 92 | .pwrdm_set_logic_retst = omap2_pwrdm_set_logic_retst, | |
| 93 | .pwrdm_set_mem_onst = omap2_pwrdm_set_mem_onst, | |
| 94 | .pwrdm_set_mem_retst = omap2_pwrdm_set_mem_retst, | |
| 95 | .pwrdm_read_mem_pwrst = omap2_pwrdm_read_mem_pwrst, | |
| 96 | .pwrdm_read_mem_retst = omap2_pwrdm_read_mem_retst, | |
| 97 | .pwrdm_wait_transition = omap2_pwrdm_wait_transition, | |
| 98 | }; | |
| 2bb2a5d3 PW |
99 | |
| 100 | /* | |
| 101 | * | |
| 102 | */ | |
| 103 | ||
| 104 | static struct prm_ll_data omap2xxx_prm_ll_data = { | |
| 105 | .read_reset_sources = &omap2xxx_prm_read_reset_sources, | |
| 106 | }; | |
| 107 | ||
| 108 | static int __init omap2xxx_prm_init(void) | |
| 109 | { | |
| 110 | if (!cpu_is_omap24xx()) | |
| 111 | return 0; | |
| 112 | ||
| 113 | return prm_register(&omap2xxx_prm_ll_data); | |
| 114 | } | |
| 115 | subsys_initcall(omap2xxx_prm_init); | |
| 116 | ||
| 117 | static void __exit omap2xxx_prm_exit(void) | |
| 118 | { | |
| 119 | if (!cpu_is_omap24xx()) | |
| 120 | return; | |
| 121 | ||
| 122 | /* Should never happen */ | |
| 123 | WARN(prm_unregister(&omap2xxx_prm_ll_data), | |
| 124 | "%s: prm_ll_data function pointer mismatch\n", __func__); | |
| 125 | } | |
| 126 | __exitcall(omap2xxx_prm_exit); |