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diff --git a/arch/arm/mach-omap2/pm-domain.c b/arch/arm/mach-omap2/pm-domain.c
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1/*
2 * linux/arch/arm/mach-omap2/pm-domain.c
3 *
4 * Power domain functions for OMAP2
5 *
6 * Copyright (C) 2006 Nokia Corporation
7 * Tony Lindgren <tony@atomide.com>
8 *
9 * Some code based on earlier OMAP2 sample PM code
10 * Copyright (C) 2005 Texas Instruments, Inc.
11 * Richard Woodruff <r-woodruff2@ti.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
18#include <linux/config.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/clk.h>
22
23#include <asm/io.h>
24
25#include "prcm-regs.h"
26
27/* Power domain offsets */
28#define PM_MPU_OFFSET 0x100
29#define PM_CORE_OFFSET 0x200
30#define PM_GFX_OFFSET 0x300
31#define PM_WKUP_OFFSET 0x400 /* Autoidle only */
32#define PM_PLL_OFFSET 0x500 /* Autoidle only */
33#define PM_DSP_OFFSET 0x800
34#define PM_MDM_OFFSET 0xc00
35
36/* Power domain wake-up dependency control register */
37#define PM_WKDEP_OFFSET 0xc8
38#define EN_MDM (1 << 5)
39#define EN_WKUP (1 << 4)
40#define EN_GFX (1 << 3)
41#define EN_DSP (1 << 2)
42#define EN_MPU (1 << 1)
43#define EN_CORE (1 << 0)
44
45/* Core power domain state transition control register */
46#define PM_PWSTCTRL_OFFSET 0xe0
47#define FORCESTATE (1 << 18) /* Only for DSP & GFX */
48#define MEM4RETSTATE (1 << 6)
49#define MEM3RETSTATE (1 << 5)
50#define MEM2RETSTATE (1 << 4)
51#define MEM1RETSTATE (1 << 3)
52#define LOGICRETSTATE (1 << 2) /* Logic is retained */
53#define POWERSTATE_OFF 0x3
54#define POWERSTATE_RETENTION 0x1
55#define POWERSTATE_ON 0x0
56
57/* Power domain state register */
58#define PM_PWSTST_OFFSET 0xe4
59
60/* Hardware supervised state transition control register */
61#define CM_CLKSTCTRL_OFFSET 0x48
62#define AUTOSTAT_MPU (1 << 0) /* MPU */
63#define AUTOSTAT_DSS (1 << 2) /* Core */
64#define AUTOSTAT_L4 (1 << 1) /* Core */
65#define AUTOSTAT_L3 (1 << 0) /* Core */
66#define AUTOSTAT_GFX (1 << 0) /* GFX */
67#define AUTOSTAT_IVA (1 << 8) /* 2420 IVA in DSP domain */
68#define AUTOSTAT_DSP (1 << 0) /* DSP */
69#define AUTOSTAT_MDM (1 << 0) /* MDM */
70
71/* Automatic control of interface clock idling */
72#define CM_AUTOIDLE1_OFFSET 0x30
73#define CM_AUTOIDLE2_OFFSET 0x34 /* Core only */
74#define CM_AUTOIDLE3_OFFSET 0x38 /* Core only */
75#define CM_AUTOIDLE4_OFFSET 0x3c /* Core only */
76#define AUTO_54M(x) (((x) & 0x3) << 6)
77#define AUTO_96M(x) (((x) & 0x3) << 2)
78#define AUTO_DPLL(x) (((x) & 0x3) << 0)
79#define AUTO_STOPPED 0x3
80#define AUTO_BYPASS_FAST 0x2 /* DPLL only */
81#define AUTO_BYPASS_LOW_POWER 0x1 /* DPLL only */
82#define AUTO_DISABLED 0x0
83
84/* Voltage control PRCM_VOLTCTRL bits */
85#define AUTO_EXTVOLT (1 << 15)
86#define FORCE_EXTVOLT (1 << 14)
87#define SETOFF_LEVEL(x) (((x) & 0x3) << 12)
88#define MEMRETCTRL (1 << 8)
89#define SETRET_LEVEL(x) (((x) & 0x3) << 6)
90#define VOLT_LEVEL(x) (((x) & 0x3) << 0)
91
92#define OMAP24XX_PRCM_VBASE IO_ADDRESS(OMAP24XX_PRCM_BASE)
93#define prcm_readl(r) __raw_readl(OMAP24XX_PRCM_VBASE + (r))
94#define prcm_writel(v, r) __raw_writel((v), OMAP24XX_PRCM_VBASE + (r))
95
96static u32 pmdomain_get_wakeup_dependencies(int domain_offset)
97{
98 return prcm_readl(domain_offset + PM_WKDEP_OFFSET);
99}
100
101static void pmdomain_set_wakeup_dependencies(u32 state, int domain_offset)
102{
103 prcm_writel(state, domain_offset + PM_WKDEP_OFFSET);
104}
105
106static u32 pmdomain_get_powerstate(int domain_offset)
107{
108 return prcm_readl(domain_offset + PM_PWSTCTRL_OFFSET);
109}
110
111static void pmdomain_set_powerstate(u32 state, int domain_offset)
112{
113 prcm_writel(state, domain_offset + PM_PWSTCTRL_OFFSET);
114}
115
116static u32 pmdomain_get_clock_autocontrol(int domain_offset)
117{
118 return prcm_readl(domain_offset + CM_CLKSTCTRL_OFFSET);
119}
120
121static void pmdomain_set_clock_autocontrol(u32 state, int domain_offset)
122{
123 prcm_writel(state, domain_offset + CM_CLKSTCTRL_OFFSET);
124}
125
126static u32 pmdomain_get_clock_autoidle1(int domain_offset)
127{
128 return prcm_readl(domain_offset + CM_AUTOIDLE1_OFFSET);
129}
130
131/* Core domain only */
132static u32 pmdomain_get_clock_autoidle2(int domain_offset)
133{
134 return prcm_readl(domain_offset + CM_AUTOIDLE2_OFFSET);
135}
136
137/* Core domain only */
138static u32 pmdomain_get_clock_autoidle3(int domain_offset)
139{
140 return prcm_readl(domain_offset + CM_AUTOIDLE3_OFFSET);
141}
142
143/* Core domain only */
144static u32 pmdomain_get_clock_autoidle4(int domain_offset)
145{
146 return prcm_readl(domain_offset + CM_AUTOIDLE4_OFFSET);
147}
148
149static void pmdomain_set_clock_autoidle1(u32 state, int domain_offset)
150{
151 prcm_writel(state, CM_AUTOIDLE1_OFFSET + domain_offset);
152}
153
154/* Core domain only */
155static void pmdomain_set_clock_autoidle2(u32 state, int domain_offset)
156{
157 prcm_writel(state, CM_AUTOIDLE2_OFFSET + domain_offset);
158}
159
160/* Core domain only */
161static void pmdomain_set_clock_autoidle3(u32 state, int domain_offset)
162{
163 prcm_writel(state, CM_AUTOIDLE3_OFFSET + domain_offset);
164}
165
166/* Core domain only */
167static void pmdomain_set_clock_autoidle4(u32 state, int domain_offset)
168{
169 prcm_writel(state, CM_AUTOIDLE4_OFFSET + domain_offset);
170}
171
172/*
173 * Configures power management domains to idle clocks automatically.
174 */
175void pmdomain_set_autoidle(void)
176{
177 u32 val;
178
179 /* Set PLL auto stop for 54M, 96M & DPLL */
180 pmdomain_set_clock_autoidle1(AUTO_54M(AUTO_STOPPED) |
181 AUTO_96M(AUTO_STOPPED) |
182 AUTO_DPLL(AUTO_STOPPED), PM_PLL_OFFSET);
183
184 /* External clock input control
185 * REVISIT: Should this be in clock framework?
186 */
187 PRCM_CLKSRC_CTRL |= (0x3 << 3);
188
189 /* Configure number of 32KHz clock cycles for sys_clk */
190 PRCM_CLKSSETUP = 0x00ff;
191
192 /* Configure automatic voltage transition */
193 PRCM_VOLTSETUP = 0;
194 val = PRCM_VOLTCTRL;
195 val &= ~(SETOFF_LEVEL(0x3) | VOLT_LEVEL(0x3));
196 val |= SETOFF_LEVEL(1) | VOLT_LEVEL(1) | AUTO_EXTVOLT;
197 PRCM_VOLTCTRL = val;
198
199 /* Disable emulation tools functional clock */
200 PRCM_CLKEMUL_CTRL = 0x0;
201
202 /* Set core memory retention state */
203 val = pmdomain_get_powerstate(PM_CORE_OFFSET);
204 if (cpu_is_omap2420()) {
205 val &= ~(0x7 << 3);
206 val |= (MEM3RETSTATE | MEM2RETSTATE | MEM1RETSTATE);
207 } else {
208 val &= ~(0xf << 3);
209 val |= (MEM4RETSTATE | MEM3RETSTATE | MEM2RETSTATE |
210 MEM1RETSTATE);
211 }
212 pmdomain_set_powerstate(val, PM_CORE_OFFSET);
213
214 /* OCP interface smart idle. REVISIT: Enable autoidle bit0 ? */
215 val = SMS_SYSCONFIG;
216 val &= ~(0x3 << 3);
217 val |= (0x2 << 3) | (1 << 0);
218 SMS_SYSCONFIG |= val;
219
220 val = SDRC_SYSCONFIG;
221 val &= ~(0x3 << 3);
222 val |= (0x2 << 3);
223 SDRC_SYSCONFIG = val;
224
225 /* Configure L3 interface for smart idle.
226 * REVISIT: Enable autoidle bit0 ?
227 */
228 val = GPMC_SYSCONFIG;
229 val &= ~(0x3 << 3);
230 val |= (0x2 << 3) | (1 << 0);
231 GPMC_SYSCONFIG = val;
232
233 pmdomain_set_powerstate(LOGICRETSTATE | POWERSTATE_RETENTION,
234 PM_MPU_OFFSET);
235 pmdomain_set_powerstate(POWERSTATE_RETENTION, PM_CORE_OFFSET);
236 if (!cpu_is_omap2420())
237 pmdomain_set_powerstate(POWERSTATE_RETENTION, PM_MDM_OFFSET);
238
239 /* Assume suspend function has saved the state for DSP and GFX */
240 pmdomain_set_powerstate(FORCESTATE | POWERSTATE_OFF, PM_DSP_OFFSET);
241 pmdomain_set_powerstate(FORCESTATE | POWERSTATE_OFF, PM_GFX_OFFSET);
242
243#if 0
244 /* REVISIT: Internal USB needs special handling */
245 force_standby_usb();
246 if (cpu_is_omap2430())
247 force_hsmmc();
248 sdram_self_refresh_on_idle_req(1);
249#endif
250
251 /* Enable clock auto control for all domains.
252 * Note that CORE domain includes also DSS, L4 & L3.
253 */
254 pmdomain_set_clock_autocontrol(AUTOSTAT_MPU, PM_MPU_OFFSET);
255 pmdomain_set_clock_autocontrol(AUTOSTAT_GFX, PM_GFX_OFFSET);
256 pmdomain_set_clock_autocontrol(AUTOSTAT_DSS | AUTOSTAT_L4 | AUTOSTAT_L3,
257 PM_CORE_OFFSET);
258 if (cpu_is_omap2420())
259 pmdomain_set_clock_autocontrol(AUTOSTAT_IVA | AUTOSTAT_DSP,
260 PM_DSP_OFFSET);
261 else {
262 pmdomain_set_clock_autocontrol(AUTOSTAT_DSP, PM_DSP_OFFSET);
263 pmdomain_set_clock_autocontrol(AUTOSTAT_MDM, PM_MDM_OFFSET);
264 }
265
266 /* Enable clock autoidle for all domains */
267 pmdomain_set_clock_autoidle1(0x2, PM_DSP_OFFSET);
268 if (cpu_is_omap2420()) {
269 pmdomain_set_clock_autoidle1(0xfffffff9, PM_CORE_OFFSET);
270 pmdomain_set_clock_autoidle2(0x7, PM_CORE_OFFSET);
271 pmdomain_set_clock_autoidle1(0x3f, PM_WKUP_OFFSET);
272 } else {
273 pmdomain_set_clock_autoidle1(0xeafffff1, PM_CORE_OFFSET);
274 pmdomain_set_clock_autoidle2(0xfff, PM_CORE_OFFSET);
275 pmdomain_set_clock_autoidle1(0x7f, PM_WKUP_OFFSET);
276 pmdomain_set_clock_autoidle1(0x3, PM_MDM_OFFSET);
277 }
278 pmdomain_set_clock_autoidle3(0x7, PM_CORE_OFFSET);
279 pmdomain_set_clock_autoidle4(0x1f, PM_CORE_OFFSET);
280}
281
282/*
283 * Initializes power domains by removing wake-up dependencies and powering
284 * down DSP and GFX. Gets called from PM init. Note that DSP and IVA code
285 * must re-enable DSP and GFX when used.
286 */
287void __init pmdomain_init(void)
288{
289 /* Remove all domain wakeup dependencies */
290 pmdomain_set_wakeup_dependencies(EN_WKUP | EN_CORE, PM_MPU_OFFSET);
291 pmdomain_set_wakeup_dependencies(0, PM_DSP_OFFSET);
292 pmdomain_set_wakeup_dependencies(0, PM_GFX_OFFSET);
293 pmdomain_set_wakeup_dependencies(EN_WKUP | EN_MPU, PM_CORE_OFFSET);
294 if (cpu_is_omap2430())
295 pmdomain_set_wakeup_dependencies(0, PM_MDM_OFFSET);
296
297 /* Power down DSP and GFX */
298 pmdomain_set_powerstate(POWERSTATE_OFF | FORCESTATE, PM_DSP_OFFSET);
299 pmdomain_set_powerstate(POWERSTATE_OFF | FORCESTATE, PM_GFX_OFFSET);
300}
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