2 * linux/arch/arm/mach-omap2/pm-domain.c
4 * Power domain functions for OMAP2
6 * Copyright (C) 2006 Nokia Corporation
7 * Tony Lindgren <tony@atomide.com>
9 * Some code based on earlier OMAP2 sample PM code
10 * Copyright (C) 2005 Texas Instruments, Inc.
11 * Richard Woodruff <r-woodruff2@ti.com>
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.
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/clk.h>
24 #include "prcm-regs.h"
26 /* Power domain offsets */
27 #define PM_MPU_OFFSET 0x100
28 #define PM_CORE_OFFSET 0x200
29 #define PM_GFX_OFFSET 0x300
30 #define PM_WKUP_OFFSET 0x400 /* Autoidle only */
31 #define PM_PLL_OFFSET 0x500 /* Autoidle only */
32 #define PM_DSP_OFFSET 0x800
33 #define PM_MDM_OFFSET 0xc00
35 /* Power domain wake-up dependency control register */
36 #define PM_WKDEP_OFFSET 0xc8
37 #define EN_MDM (1 << 5)
38 #define EN_WKUP (1 << 4)
39 #define EN_GFX (1 << 3)
40 #define EN_DSP (1 << 2)
41 #define EN_MPU (1 << 1)
42 #define EN_CORE (1 << 0)
44 /* Core power domain state transition control register */
45 #define PM_PWSTCTRL_OFFSET 0xe0
46 #define FORCESTATE (1 << 18) /* Only for DSP & GFX */
47 #define MEM4RETSTATE (1 << 6)
48 #define MEM3RETSTATE (1 << 5)
49 #define MEM2RETSTATE (1 << 4)
50 #define MEM1RETSTATE (1 << 3)
51 #define LOGICRETSTATE (1 << 2) /* Logic is retained */
52 #define POWERSTATE_OFF 0x3
53 #define POWERSTATE_RETENTION 0x1
54 #define POWERSTATE_ON 0x0
56 /* Power domain state register */
57 #define PM_PWSTST_OFFSET 0xe4
59 /* Hardware supervised state transition control register */
60 #define CM_CLKSTCTRL_OFFSET 0x48
61 #define AUTOSTAT_MPU (1 << 0) /* MPU */
62 #define AUTOSTAT_DSS (1 << 2) /* Core */
63 #define AUTOSTAT_L4 (1 << 1) /* Core */
64 #define AUTOSTAT_L3 (1 << 0) /* Core */
65 #define AUTOSTAT_GFX (1 << 0) /* GFX */
66 #define AUTOSTAT_IVA (1 << 8) /* 2420 IVA in DSP domain */
67 #define AUTOSTAT_DSP (1 << 0) /* DSP */
68 #define AUTOSTAT_MDM (1 << 0) /* MDM */
70 /* Automatic control of interface clock idling */
71 #define CM_AUTOIDLE1_OFFSET 0x30
72 #define CM_AUTOIDLE2_OFFSET 0x34 /* Core only */
73 #define CM_AUTOIDLE3_OFFSET 0x38 /* Core only */
74 #define CM_AUTOIDLE4_OFFSET 0x3c /* Core only */
75 #define AUTO_54M(x) (((x) & 0x3) << 6)
76 #define AUTO_96M(x) (((x) & 0x3) << 2)
77 #define AUTO_DPLL(x) (((x) & 0x3) << 0)
78 #define AUTO_STOPPED 0x3
79 #define AUTO_BYPASS_FAST 0x2 /* DPLL only */
80 #define AUTO_BYPASS_LOW_POWER 0x1 /* DPLL only */
81 #define AUTO_DISABLED 0x0
83 /* Voltage control PRCM_VOLTCTRL bits */
84 #define AUTO_EXTVOLT (1 << 15)
85 #define FORCE_EXTVOLT (1 << 14)
86 #define SETOFF_LEVEL(x) (((x) & 0x3) << 12)
87 #define MEMRETCTRL (1 << 8)
88 #define SETRET_LEVEL(x) (((x) & 0x3) << 6)
89 #define VOLT_LEVEL(x) (((x) & 0x3) << 0)
91 #define OMAP24XX_PRCM_VBASE IO_ADDRESS(OMAP24XX_PRCM_BASE)
92 #define prcm_readl(r) __raw_readl(OMAP24XX_PRCM_VBASE + (r))
93 #define prcm_writel(v, r) __raw_writel((v), OMAP24XX_PRCM_VBASE + (r))
95 static u32 pmdomain_get_wakeup_dependencies(int domain_offset)
97 return prcm_readl(domain_offset + PM_WKDEP_OFFSET);
100 static void pmdomain_set_wakeup_dependencies(u32 state, int domain_offset)
102 prcm_writel(state, domain_offset + PM_WKDEP_OFFSET);
105 static u32 pmdomain_get_powerstate(int domain_offset)
107 return prcm_readl(domain_offset + PM_PWSTCTRL_OFFSET);
110 static void pmdomain_set_powerstate(u32 state, int domain_offset)
112 prcm_writel(state, domain_offset + PM_PWSTCTRL_OFFSET);
115 static u32 pmdomain_get_clock_autocontrol(int domain_offset)
117 return prcm_readl(domain_offset + CM_CLKSTCTRL_OFFSET);
120 static void pmdomain_set_clock_autocontrol(u32 state, int domain_offset)
122 prcm_writel(state, domain_offset + CM_CLKSTCTRL_OFFSET);
125 static u32 pmdomain_get_clock_autoidle1(int domain_offset)
127 return prcm_readl(domain_offset + CM_AUTOIDLE1_OFFSET);
130 /* Core domain only */
131 static u32 pmdomain_get_clock_autoidle2(int domain_offset)
133 return prcm_readl(domain_offset + CM_AUTOIDLE2_OFFSET);
136 /* Core domain only */
137 static u32 pmdomain_get_clock_autoidle3(int domain_offset)
139 return prcm_readl(domain_offset + CM_AUTOIDLE3_OFFSET);
142 /* Core domain only */
143 static u32 pmdomain_get_clock_autoidle4(int domain_offset)
145 return prcm_readl(domain_offset + CM_AUTOIDLE4_OFFSET);
148 static void pmdomain_set_clock_autoidle1(u32 state, int domain_offset)
150 prcm_writel(state, CM_AUTOIDLE1_OFFSET + domain_offset);
153 /* Core domain only */
154 static void pmdomain_set_clock_autoidle2(u32 state, int domain_offset)
156 prcm_writel(state, CM_AUTOIDLE2_OFFSET + domain_offset);
159 /* Core domain only */
160 static void pmdomain_set_clock_autoidle3(u32 state, int domain_offset)
162 prcm_writel(state, CM_AUTOIDLE3_OFFSET + domain_offset);
165 /* Core domain only */
166 static void pmdomain_set_clock_autoidle4(u32 state, int domain_offset)
168 prcm_writel(state, CM_AUTOIDLE4_OFFSET + domain_offset);
172 * Configures power management domains to idle clocks automatically.
174 void pmdomain_set_autoidle(void)
178 /* Set PLL auto stop for 54M, 96M & DPLL */
179 pmdomain_set_clock_autoidle1(AUTO_54M(AUTO_STOPPED) |
180 AUTO_96M(AUTO_STOPPED) |
181 AUTO_DPLL(AUTO_STOPPED), PM_PLL_OFFSET);
183 /* External clock input control
184 * REVISIT: Should this be in clock framework?
186 PRCM_CLKSRC_CTRL |= (0x3 << 3);
188 /* Configure number of 32KHz clock cycles for sys_clk */
189 PRCM_CLKSSETUP = 0x00ff;
191 /* Configure automatic voltage transition */
194 val &= ~(SETOFF_LEVEL(0x3) | VOLT_LEVEL(0x3));
195 val |= SETOFF_LEVEL(1) | VOLT_LEVEL(1) | AUTO_EXTVOLT;
198 /* Disable emulation tools functional clock */
199 PRCM_CLKEMUL_CTRL = 0x0;
201 /* Set core memory retention state */
202 val = pmdomain_get_powerstate(PM_CORE_OFFSET);
203 if (cpu_is_omap2420()) {
205 val |= (MEM3RETSTATE | MEM2RETSTATE | MEM1RETSTATE);
208 val |= (MEM4RETSTATE | MEM3RETSTATE | MEM2RETSTATE |
211 pmdomain_set_powerstate(val, PM_CORE_OFFSET);
213 /* OCP interface smart idle. REVISIT: Enable autoidle bit0 ? */
216 val |= (0x2 << 3) | (1 << 0);
217 SMS_SYSCONFIG |= val;
219 val = SDRC_SYSCONFIG;
222 SDRC_SYSCONFIG = val;
224 /* Configure L3 interface for smart idle.
225 * REVISIT: Enable autoidle bit0 ?
227 val = GPMC_SYSCONFIG;
229 val |= (0x2 << 3) | (1 << 0);
230 GPMC_SYSCONFIG = val;
232 pmdomain_set_powerstate(LOGICRETSTATE | POWERSTATE_RETENTION,
234 pmdomain_set_powerstate(POWERSTATE_RETENTION, PM_CORE_OFFSET);
235 if (!cpu_is_omap2420())
236 pmdomain_set_powerstate(POWERSTATE_RETENTION, PM_MDM_OFFSET);
238 /* Assume suspend function has saved the state for DSP and GFX */
239 pmdomain_set_powerstate(FORCESTATE | POWERSTATE_OFF, PM_DSP_OFFSET);
240 pmdomain_set_powerstate(FORCESTATE | POWERSTATE_OFF, PM_GFX_OFFSET);
243 /* REVISIT: Internal USB needs special handling */
245 if (cpu_is_omap2430())
247 sdram_self_refresh_on_idle_req(1);
250 /* Enable clock auto control for all domains.
251 * Note that CORE domain includes also DSS, L4 & L3.
253 pmdomain_set_clock_autocontrol(AUTOSTAT_MPU, PM_MPU_OFFSET);
254 pmdomain_set_clock_autocontrol(AUTOSTAT_GFX, PM_GFX_OFFSET);
255 pmdomain_set_clock_autocontrol(AUTOSTAT_DSS | AUTOSTAT_L4 | AUTOSTAT_L3,
257 if (cpu_is_omap2420())
258 pmdomain_set_clock_autocontrol(AUTOSTAT_IVA | AUTOSTAT_DSP,
261 pmdomain_set_clock_autocontrol(AUTOSTAT_DSP, PM_DSP_OFFSET);
262 pmdomain_set_clock_autocontrol(AUTOSTAT_MDM, PM_MDM_OFFSET);
265 /* Enable clock autoidle for all domains */
266 pmdomain_set_clock_autoidle1(0x2, PM_DSP_OFFSET);
267 if (cpu_is_omap2420()) {
268 pmdomain_set_clock_autoidle1(0xfffffff9, PM_CORE_OFFSET);
269 pmdomain_set_clock_autoidle2(0x7, PM_CORE_OFFSET);
270 pmdomain_set_clock_autoidle1(0x3f, PM_WKUP_OFFSET);
272 pmdomain_set_clock_autoidle1(0xeafffff1, PM_CORE_OFFSET);
273 pmdomain_set_clock_autoidle2(0xfff, PM_CORE_OFFSET);
274 pmdomain_set_clock_autoidle1(0x7f, PM_WKUP_OFFSET);
275 pmdomain_set_clock_autoidle1(0x3, PM_MDM_OFFSET);
277 pmdomain_set_clock_autoidle3(0x7, PM_CORE_OFFSET);
278 pmdomain_set_clock_autoidle4(0x1f, PM_CORE_OFFSET);
282 * Initializes power domains by removing wake-up dependencies and powering
283 * down DSP and GFX. Gets called from PM init. Note that DSP and IVA code
284 * must re-enable DSP and GFX when used.
286 void __init pmdomain_init(void)
288 /* Remove all domain wakeup dependencies */
289 pmdomain_set_wakeup_dependencies(EN_WKUP | EN_CORE, PM_MPU_OFFSET);
290 pmdomain_set_wakeup_dependencies(0, PM_DSP_OFFSET);
291 pmdomain_set_wakeup_dependencies(0, PM_GFX_OFFSET);
292 pmdomain_set_wakeup_dependencies(EN_WKUP | EN_MPU, PM_CORE_OFFSET);
293 if (cpu_is_omap2430())
294 pmdomain_set_wakeup_dependencies(0, PM_MDM_OFFSET);
296 /* Power down DSP and GFX */
297 pmdomain_set_powerstate(POWERSTATE_OFF | FORCESTATE, PM_DSP_OFFSET);
298 pmdomain_set_powerstate(POWERSTATE_OFF | FORCESTATE, PM_GFX_OFFSET);