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 "clockdomain.h"
39 #include "prm2xxx_3xxx.h"
40 #include "cm2xxx_3xxx.h"
41 #include "cm-regbits-24xx.h"
42 #include "prm-regbits-24xx.h"
43 
44 /*
45  * Clockdomain dependencies for wkdeps
46  *
47  * XXX Hardware dependencies (e.g., dependencies that cannot be
48  * changed in software) are not included here yet, but should be.
49  */
50 
51 /* Wakeup dependency source arrays */
52 
53 /* 2420-specific possible wakeup dependencies */
54 
55 /* 2420 PM_WKDEP_MPU: CORE, DSP, WKUP */
56 static struct clkdm_dep mpu_2420_wkdeps[] = {
57 	{ .clkdm_name = "core_l3_clkdm" },
58 	{ .clkdm_name = "core_l4_clkdm" },
59 	{ .clkdm_name = "dsp_clkdm" },
60 	{ .clkdm_name = "wkup_clkdm" },
61 	{ NULL },
62 };
63 
64 /* 2420 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP */
65 static struct clkdm_dep core_2420_wkdeps[] = {
66 	{ .clkdm_name = "dsp_clkdm" },
67 	{ .clkdm_name = "gfx_clkdm" },
68 	{ .clkdm_name = "mpu_clkdm" },
69 	{ .clkdm_name = "wkup_clkdm" },
70 	{ NULL },
71 };
72 
73 /*
74  * 2420-only clockdomains
75  */
76 
77 static struct clockdomain mpu_2420_clkdm = {
78 	.name		= "mpu_clkdm",
79 	.pwrdm		= { .name = "mpu_pwrdm" },
80 	.flags		= CLKDM_CAN_HWSUP,
81 	.wkdep_srcs	= mpu_2420_wkdeps,
82 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK,
83 };
84 
85 static struct clockdomain iva1_2420_clkdm = {
86 	.name		= "iva1_clkdm",
87 	.pwrdm		= { .name = "dsp_pwrdm" },
88 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
89 	.dep_bit	= OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT,
90 	.wkdep_srcs	= dsp_24xx_wkdeps,
91 	.clktrctrl_mask = OMAP2420_AUTOSTATE_IVA_MASK,
92 };
93 
94 static struct clockdomain dsp_2420_clkdm = {
95 	.name		= "dsp_clkdm",
96 	.pwrdm		= { .name = "dsp_pwrdm" },
97 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
98 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK,
99 };
100 
101 static struct clockdomain gfx_2420_clkdm = {
102 	.name		= "gfx_clkdm",
103 	.pwrdm		= { .name = "gfx_pwrdm" },
104 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
105 	.wkdep_srcs	= gfx_24xx_wkdeps,
106 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK,
107 };
108 
109 static struct clockdomain core_l3_2420_clkdm = {
110 	.name		= "core_l3_clkdm",
111 	.pwrdm		= { .name = "core_pwrdm" },
112 	.flags		= CLKDM_CAN_HWSUP,
113 	.wkdep_srcs	= core_2420_wkdeps,
114 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK,
115 };
116 
117 static struct clockdomain core_l4_2420_clkdm = {
118 	.name		= "core_l4_clkdm",
119 	.pwrdm		= { .name = "core_pwrdm" },
120 	.flags		= CLKDM_CAN_HWSUP,
121 	.wkdep_srcs	= core_2420_wkdeps,
122 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK,
123 };
124 
125 static struct clockdomain dss_2420_clkdm = {
126 	.name		= "dss_clkdm",
127 	.pwrdm		= { .name = "core_pwrdm" },
128 	.flags		= CLKDM_CAN_HWSUP,
129 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK,
130 };
131 
132 static struct clockdomain *clockdomains_omap242x[] __initdata = {
133 	&wkup_common_clkdm,
134 	&mpu_2420_clkdm,
135 	&iva1_2420_clkdm,
136 	&dsp_2420_clkdm,
137 	&gfx_2420_clkdm,
138 	&core_l3_2420_clkdm,
139 	&core_l4_2420_clkdm,
140 	&dss_2420_clkdm,
141 	NULL,
142 };
143 
144 void __init omap242x_clockdomains_init(void)
145 {
146 	if (!cpu_is_omap242x())
147 		return;
148 
149 	clkdm_register_platform_funcs(&omap2_clkdm_operations);
150 	clkdm_register_clkdms(clockdomains_omap242x);
151 	clkdm_complete_init();
152 }
153