1 /*
2  * OMAP2420 clockdomains
3  *
4  * Copyright (C) 2008-2011 Texas Instruments, Inc.
5  * Copyright (C) 2008-2010 Nokia Corporation
6  *
7  * Paul Walmsley, Jouni Högander
8  *
9  * This file contains clockdomains and clockdomain wakeup dependencies
10  * for OMAP2420 chips.  Some notes:
11  *
12  * A useful validation rule for struct clockdomain: Any clockdomain
13  * referenced by a wkdep_srcs must have a dep_bit assigned.  So
14  * wkdep_srcs are really just software-controllable dependencies.
15  * Non-software-controllable dependencies do exist, but they are not
16  * encoded below (yet).
17  *
18  * 24xx does not support programmable sleep dependencies (SLEEPDEP)
19  *
20  * The overly-specific dep_bit names are due to a bit name collision
21  * with CM_FCLKEN_{DSP,IVA2}.  The DSP/IVA2 PM_WKDEP and CM_SLEEPDEP shift
22  * value are the same for all powerdomains: 2
23  *
24  * XXX should dep_bit be a mask, so we can test to see if it is 0 as a
25  * sanity check?
26  * XXX encode hardware fixed wakeup dependencies -- esp. for 3430 CORE
27  */
28 
29 /*
30  * To-Do List
31  * -> Port the Sleep/Wakeup dependencies for the domains
32  *    from the Power domain framework
33  */
34 
35 #include <linux/kernel.h>
36 #include <linux/io.h>
37 
38 #include "soc.h"
39 #include "clockdomain.h"
40 #include "prm2xxx_3xxx.h"
41 #include "cm2xxx_3xxx.h"
42 #include "cm-regbits-24xx.h"
43 #include "prm-regbits-24xx.h"
44 
45 /*
46  * Clockdomain dependencies for wkdeps
47  *
48  * XXX Hardware dependencies (e.g., dependencies that cannot be
49  * changed in software) are not included here yet, but should be.
50  */
51 
52 /* Wakeup dependency source arrays */
53 
54 /* 2420-specific possible wakeup dependencies */
55 
56 /* 2420 PM_WKDEP_MPU: CORE, DSP, WKUP */
57 static struct clkdm_dep mpu_2420_wkdeps[] = {
58 	{ .clkdm_name = "core_l3_clkdm" },
59 	{ .clkdm_name = "core_l4_clkdm" },
60 	{ .clkdm_name = "dsp_clkdm" },
61 	{ .clkdm_name = "wkup_clkdm" },
62 	{ NULL },
63 };
64 
65 /* 2420 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP */
66 static struct clkdm_dep core_2420_wkdeps[] = {
67 	{ .clkdm_name = "dsp_clkdm" },
68 	{ .clkdm_name = "gfx_clkdm" },
69 	{ .clkdm_name = "mpu_clkdm" },
70 	{ .clkdm_name = "wkup_clkdm" },
71 	{ NULL },
72 };
73 
74 /*
75  * 2420-only clockdomains
76  */
77 
78 static struct clockdomain mpu_2420_clkdm = {
79 	.name		= "mpu_clkdm",
80 	.pwrdm		= { .name = "mpu_pwrdm" },
81 	.flags		= CLKDM_CAN_HWSUP,
82 	.wkdep_srcs	= mpu_2420_wkdeps,
83 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK,
84 };
85 
86 static struct clockdomain iva1_2420_clkdm = {
87 	.name		= "iva1_clkdm",
88 	.pwrdm		= { .name = "dsp_pwrdm" },
89 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
90 	.dep_bit	= OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT,
91 	.wkdep_srcs	= dsp_24xx_wkdeps,
92 	.clktrctrl_mask = OMAP2420_AUTOSTATE_IVA_MASK,
93 };
94 
95 static struct clockdomain dsp_2420_clkdm = {
96 	.name		= "dsp_clkdm",
97 	.pwrdm		= { .name = "dsp_pwrdm" },
98 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
99 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK,
100 };
101 
102 static struct clockdomain gfx_2420_clkdm = {
103 	.name		= "gfx_clkdm",
104 	.pwrdm		= { .name = "gfx_pwrdm" },
105 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
106 	.wkdep_srcs	= gfx_24xx_wkdeps,
107 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK,
108 };
109 
110 static struct clockdomain core_l3_2420_clkdm = {
111 	.name		= "core_l3_clkdm",
112 	.pwrdm		= { .name = "core_pwrdm" },
113 	.flags		= CLKDM_CAN_HWSUP,
114 	.wkdep_srcs	= core_2420_wkdeps,
115 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK,
116 };
117 
118 static struct clockdomain core_l4_2420_clkdm = {
119 	.name		= "core_l4_clkdm",
120 	.pwrdm		= { .name = "core_pwrdm" },
121 	.flags		= CLKDM_CAN_HWSUP,
122 	.wkdep_srcs	= core_2420_wkdeps,
123 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK,
124 };
125 
126 static struct clockdomain dss_2420_clkdm = {
127 	.name		= "dss_clkdm",
128 	.pwrdm		= { .name = "core_pwrdm" },
129 	.flags		= CLKDM_CAN_HWSUP,
130 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK,
131 };
132 
133 static struct clockdomain *clockdomains_omap242x[] __initdata = {
134 	&wkup_common_clkdm,
135 	&mpu_2420_clkdm,
136 	&iva1_2420_clkdm,
137 	&dsp_2420_clkdm,
138 	&gfx_2420_clkdm,
139 	&core_l3_2420_clkdm,
140 	&core_l4_2420_clkdm,
141 	&dss_2420_clkdm,
142 	NULL,
143 };
144 
145 void __init omap242x_clockdomains_init(void)
146 {
147 	if (!cpu_is_omap242x())
148 		return;
149 
150 	clkdm_register_platform_funcs(&omap2_clkdm_operations);
151 	clkdm_register_clkdms(clockdomains_omap242x);
152 	clkdm_complete_init();
153 }
154