diff options
| -rw-r--r-- | arch/arm/mach-omap2/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain-common.c | 111 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 303 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain2xxx_3xxx.c | 131 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain44xx.c | 85 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/powerdomains.h | 5 |
6 files changed, 389 insertions, 248 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index c43948c8d543..1a1e978cd4bf 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -78,7 +78,7 @@ obj-$(CONFIG_ARCH_OMAP3) += prcm.o cm.o obj-$(CONFIG_ARCH_OMAP4) += prcm.o cm4xxx.o # OMAP powerdomain framework -powerdomain-common += powerdomain.o powerdomains_data.o +powerdomain-common += powerdomain.o powerdomains_data.o powerdomain-common.o obj-$(CONFIG_ARCH_OMAP2) += $(powerdomain-common) \ powerdomain2xxx_3xxx.o obj-$(CONFIG_ARCH_OMAP3) += $(powerdomain-common) \ diff --git a/arch/arm/mach-omap2/powerdomain-common.c b/arch/arm/mach-omap2/powerdomain-common.c new file mode 100644 index 000000000000..cb01c7a3689a --- /dev/null +++ b/arch/arm/mach-omap2/powerdomain-common.c @@ -0,0 +1,111 @@ +/* + * linux/arch/arm/mach-omap2/powerdomain-common.c + * Contains common powerdomain framework functions + * + * Copyright (C) 2010 Texas Instruments, Inc. + * Copyright (C) 2010 Nokia Corporation + * + * Derived from mach-omap2/powerdomain.c written by Paul Walmsley + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/errno.h> +#include <linux/kernel.h> +#include "pm.h" +#include "cm.h" +#include "cm-regbits-34xx.h" +#include "cm-regbits-44xx.h" +#include "prm-regbits-34xx.h" +#include "prm-regbits-44xx.h" +#include "powerdomains.h" + +/* + * OMAP3 and OMAP4 specific register bit initialisations + * Notice that the names here are not according to each power + * domain but the bit mapping used applies to all of them + */ +/* OMAP3 and OMAP4 Memory Onstate Masks (common across all power domains) */ +#define OMAP_MEM0_ONSTATE_MASK OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK +#define OMAP_MEM1_ONSTATE_MASK OMAP3430_L1FLATMEMONSTATE_MASK +#define OMAP_MEM2_ONSTATE_MASK OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK +#define OMAP_MEM3_ONSTATE_MASK OMAP3430_L2FLATMEMONSTATE_MASK +#define OMAP_MEM4_ONSTATE_MASK OMAP4430_OCP_NRET_BANK_ONSTATE_MASK + +/* OMAP3 and OMAP4 Memory Retstate Masks (common across all power domains) */ +#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE_MASK +#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE_MASK +#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE_MASK +#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE_MASK +#define OMAP_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK + +/* OMAP3 and OMAP4 Memory Status bits */ +#define OMAP_MEM0_STATEST_MASK OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK +#define OMAP_MEM1_STATEST_MASK OMAP3430_L1FLATMEMSTATEST_MASK +#define OMAP_MEM2_STATEST_MASK OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK +#define OMAP_MEM3_STATEST_MASK OMAP3430_L2FLATMEMSTATEST_MASK +#define OMAP_MEM4_STATEST_MASK OMAP4430_OCP_NRET_BANK_STATEST_MASK + +/* Common Internal functions used across OMAP rev's*/ +u32 omap2_pwrdm_get_mem_bank_onstate_mask(u8 bank) +{ + switch (bank) { + case 0: + return OMAP_MEM0_ONSTATE_MASK; + case 1: + return OMAP_MEM1_ONSTATE_MASK; + case 2: + return OMAP_MEM2_ONSTATE_MASK; + case 3: + return OMAP_MEM3_ONSTATE_MASK; + case 4: + return OMAP_MEM4_ONSTATE_MASK; + default: + WARN_ON(1); /* should never happen */ + return -EEXIST; + } + return 0; +} + +u32 omap2_pwrdm_get_mem_bank_retst_mask(u8 bank) +{ + switch (bank) { + case 0: + return OMAP_MEM0_RETSTATE_MASK; + case 1: + return OMAP_MEM1_RETSTATE_MASK; + case 2: + return OMAP_MEM2_RETSTATE_MASK; + case 3: + return OMAP_MEM3_RETSTATE_MASK; + case 4: + return OMAP_MEM4_RETSTATE_MASK; + default: + WARN_ON(1); /* should never happen */ + return -EEXIST; + } + return 0; +} + +u32 omap2_pwrdm_get_mem_bank_stst_mask(u8 bank) +{ + switch (bank) { + case 0: + return OMAP_MEM0_STATEST_MASK; + case 1: + return OMAP_MEM1_STATEST_MASK; + case 2: + return OMAP_MEM2_STATEST_MASK; + case 3: + return OMAP_MEM3_STATEST_MASK; + case 4: + return OMAP_MEM4_STATEST_MASK; + default: + WARN_ON(1); /* should never happen */ + return -EEXIST; + } + return 0; +} + diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 562a3fe9db5b..620672135768 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -15,23 +15,10 @@ #undef DEBUG #include <linux/kernel.h> -#include <linux/module.h> #include <linux/types.h> -#include <linux/delay.h> -#include <linux/spinlock.h> #include <linux/list.h> #include <linux/errno.h> -#include <linux/err.h> -#include <linux/io.h> - -#include <asm/atomic.h> - -#include "cm.h" -#include "cm-regbits-34xx.h" -#include "cm-regbits-44xx.h" -#include "prm.h" -#include "prm-regbits-34xx.h" -#include "prm-regbits-44xx.h" +#include <linux/string.h> #include <plat/cpu.h> #include <plat/powerdomain.h> @@ -45,37 +32,6 @@ enum { PWRDM_STATE_PREV, }; -/* Variable holding value of the CPU dependent PWRSTCTRL Register Offset */ -static u16 pwrstctrl_reg_offs; - -/* Variable holding value of the CPU dependent PWRSTST Register Offset */ -static u16 pwrstst_reg_offs; - -/* OMAP3 and OMAP4 specific register bit initialisations - * Notice that the names here are not according to each power - * domain but the bit mapping used applies to all of them - */ - -/* OMAP3 and OMAP4 Memory Onstate Masks (common across all power domains) */ -#define OMAP_MEM0_ONSTATE_MASK OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK -#define OMAP_MEM1_ONSTATE_MASK OMAP3430_L1FLATMEMONSTATE_MASK -#define OMAP_MEM2_ONSTATE_MASK OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK -#define OMAP_MEM3_ONSTATE_MASK OMAP3430_L2FLATMEMONSTATE_MASK -#define OMAP_MEM4_ONSTATE_MASK OMAP4430_OCP_NRET_BANK_ONSTATE_MASK - -/* OMAP3 and OMAP4 Memory Retstate Masks (common across all power domains) */ -#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE_MASK -#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE_MASK -#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE_MASK -#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE_MASK -#define OMAP_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK - -/* OMAP3 and OMAP4 Memory Status bits */ -#define OMAP_MEM0_STATEST_MASK OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK -#define OMAP_MEM1_STATEST_MASK OMAP3430_L1FLATMEMSTATEST_MASK -#define OMAP_MEM2_STATEST_MASK OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK -#define OMAP_MEM3_STATEST_MASK OMAP3430_L2FLATMEMSTATEST_MASK -#define OMAP_MEM4_STATEST_MASK OMAP4430_OCP_NRET_BANK_STATEST_MASK /* pwrdm_list contains all registered struct powerdomains */ static LIST_HEAD(pwrdm_list); @@ -225,18 +181,6 @@ void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs) { struct powerdomain **p = NULL; - if (cpu_is_omap24xx() || cpu_is_omap34xx()) { - pwrstctrl_reg_offs = OMAP2_PM_PWSTCTRL; - pwrstst_reg_offs = OMAP2_PM_PWSTST; - } else if (cpu_is_omap44xx()) { - pwrstctrl_reg_offs = OMAP4_PM_PWSTCTRL; - pwrstst_reg_offs = OMAP4_PM_PWSTST; - } else { - printk(KERN_ERR "Power Domain struct not supported for " \ - "this CPU\n"); - return; - } - if (!custom_funcs) WARN(1, "powerdomain: No custom pwrdm functions registered\n"); else @@ -566,7 +510,7 @@ int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) */ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) { - u32 m; + int ret = -EINVAL; if (!pwrdm) return -EINVAL; @@ -580,37 +524,10 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) pr_debug("powerdomain: setting next memory powerstate for domain %s " "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst); - /* - * The register bit names below may not correspond to the - * actual names of the bits in each powerdomain's register, - * but the type of value returned is the same for each - * powerdomain. - */ - switch (bank) { - case 0: - m = OMAP_MEM0_ONSTATE_MASK; - break; - case 1: - m = OMAP_MEM1_ONSTATE_MASK; - break; - case 2: - m = OMAP_MEM2_ONSTATE_MASK; - break; - case 3: - m = OMAP_MEM3_ONSTATE_MASK; - break; - case 4: - m = OMAP_MEM4_ONSTATE_MASK; - break; - default: - WARN_ON(1); /* should never happen */ - return -EEXIST; - } - - prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), - pwrdm->prcm_offs, pwrstctrl_reg_offs); + if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst) + ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst); - return 0; + return ret; } /** @@ -631,7 +548,7 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) */ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) { - u32 m; + int ret = -EINVAL; if (!pwrdm) return -EINVAL; @@ -645,37 +562,10 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) pr_debug("powerdomain: setting next memory powerstate for domain %s " "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst); - /* - * The register bit names below may not correspond to the - * actual names of the bits in each powerdomain's register, - * but the type of value returned is the same for each - * powerdomain. - */ - switch (bank) { - case 0: - m = OMAP_MEM0_RETSTATE_MASK; - break; - case 1: - m = OMAP_MEM1_RETSTATE_MASK; - break; - case 2: - m = OMAP_MEM2_RETSTATE_MASK; - break; - case 3: - m = OMAP_MEM3_RETSTATE_MASK; - break; - case 4: - m = OMAP_MEM4_RETSTATE_MASK; - break; - default: - WARN_ON(1); /* should never happen */ - return -EEXIST; - } - - prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, - pwrstctrl_reg_offs); + if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst) + ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst); - return 0; + return ret; } /** @@ -754,46 +644,21 @@ int pwrdm_read_logic_retst(struct powerdomain *pwrdm) */ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) { - u32 m; + int ret = -EINVAL; if (!pwrdm) - return -EINVAL; + return ret; if (pwrdm->banks < (bank + 1)) - return -EEXIST; + return ret; if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) bank = 1; - /* - * The register bit names below may not correspond to the - * actual names of the bits in each powerdomain's register, - * but the type of value returned is the same for each - * powerdomain. - */ - switch (bank) { - case 0: - m = OMAP_MEM0_STATEST_MASK; - break; - case 1: - m = OMAP_MEM1_STATEST_MASK; - break; - case 2: - m = OMAP_MEM2_STATEST_MASK; - break; - case 3: - m = OMAP_MEM3_STATEST_MASK; - break; - case 4: - m = OMAP_MEM4_STATEST_MASK; - break; - default: - WARN_ON(1); /* should never happen */ - return -EEXIST; - } + if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst) + ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank); - return prm_read_mod_bits_shift(pwrdm->prcm_offs, - pwrstst_reg_offs, m); + return ret; } /** @@ -809,43 +674,21 @@ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) */ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) { - u32 m; + int ret = -EINVAL; if (!pwrdm) - return -EINVAL; + return ret; if (pwrdm->banks < (bank + 1)) - return -EEXIST; + return ret; if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK) bank = 1; - /* - * The register bit names below may not correspond to the - * actual names of the bits in each powerdomain's register, - * but the type of value returned is the same for each - * powerdomain. - */ - switch (bank) { - case 0: - m = OMAP3430_LASTMEM1STATEENTERED_MASK; - break; - case 1: - m = OMAP3430_LASTMEM2STATEENTERED_MASK; - break; - case 2: - m = OMAP3430_LASTSHAREDL2CACHEFLATSTATEENTERED_MASK; - break; - case 3: - m = OMAP3430_LASTL2FLATMEMSTATEENTERED_MASK; - break; - default: - WARN_ON(1); /* should never happen */ - return -EEXIST; - } + if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst) + ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank); - return prm_read_mod_bits_shift(pwrdm->prcm_offs, - OMAP3430_PM_PREPWSTST, m); + return ret; } /** @@ -860,43 +703,18 @@ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) */ int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) { - u32 m; + int ret = -EINVAL; if (!pwrdm) - return -EINVAL; + return ret; if (pwrdm->banks < (bank + 1)) - return -EEXIST; + return ret; - /* - * The register bit names below may not correspond to the - * actual names of the bits in each powerdomain's register, - * but the type of value returned is the same for each - * powerdomain. - */ - switch (bank) { - case 0: - m = OMAP_MEM0_RETSTATE_MASK; - break; - case 1: - m = OMAP_MEM1_RETSTATE_MASK; - break; - case 2: - m = OMAP_MEM2_RETSTATE_MASK; - break; - case 3: - m = OMAP_MEM3_RETSTATE_MASK; - break; - case 4: - m = OMAP_MEM4_RETSTATE_MASK; - break; - default: - WARN_ON(1); /* should never happen */ - return -EEXIST; - } + if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst) + ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank); - return prm_read_mod_bits_shift(pwrdm->prcm_offs, - pwrstctrl_reg_offs, m); + return ret; } /** @@ -910,8 +728,10 @@ int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) */ int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) { + int ret = -EINVAL; + if (!pwrdm) - return -EINVAL; + return ret; /* * XXX should get the powerdomain's current state here; @@ -921,9 +741,10 @@ int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) pr_debug("powerdomain: clearing previous power state reg for %s\n", pwrdm->name); - prm_write_mod_reg(0, pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST); + if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst) + ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm); - return 0; + return ret; } /** @@ -939,19 +760,21 @@ int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) */ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) { + int ret = -EINVAL; + if (!pwrdm) - return -EINVAL; + return ret; if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) - return -EINVAL; + return ret; pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", pwrdm->name); - prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, - pwrdm->prcm_offs, pwrstctrl_reg_offs); + if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar) + ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm); - return 0; + return ret; } /** @@ -967,19 +790,21 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) */ int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) { + int ret = -EINVAL; + if (!pwrdm) - return -EINVAL; + return ret; if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) - return -EINVAL; + return ret; pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", pwrdm->name); - prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0, - pwrdm->prcm_offs, pwrstctrl_reg_offs); + if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar) + ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm); - return 0; + return ret; } /** @@ -1006,6 +831,8 @@ bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) */ int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) { + int ret = -EINVAL; + if (!pwrdm) return -EINVAL; @@ -1015,11 +842,10 @@ int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n", pwrdm->name); - prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK, - (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT), - pwrdm->prcm_offs, pwrstctrl_reg_offs); + if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange) + ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm); - return 0; + return ret; } /** @@ -1034,32 +860,15 @@ int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) */ int pwrdm_wait_transition(struct powerdomain *pwrdm) { - u32 c = 0; + int ret = -EINVAL; if (!pwrdm) return -EINVAL; - /* - * REVISIT: pwrdm_wait_transition() may be better implemented - * via a callback and a periodic timer check -- how long do we expect - * powerdomain transitions to take? - */ + if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition) + ret = arch_pwrdm->pwrdm_wait_transition(pwrdm); - /* XXX Is this udelay() value meaningful? */ - while ((prm_read_mod_reg(pwrdm->prcm_offs, pwrstst_reg_offs) & - OMAP_INTRANSITION_MASK) && - (c++ < PWRDM_TRANSITION_BAILOUT)) - udelay(1); - - if (c > PWRDM_TRANSITION_BAILOUT) { - printk(KERN_ERR "powerdomain: waited too long for " - "powerdomain %s to complete transition\n", pwrdm->name); - return -EAGAIN; - } - - pr_debug("powerdomain: completed transition in %d loops\n", c); - - return 0; + return ret; } int pwrdm_state_switch(struct powerdomain *pwrdm) diff --git a/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c b/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c index b7ea191539e5..6cdf67860cb3 100644 --- a/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c +++ b/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c @@ -41,6 +41,50 @@ static int omap2_pwrdm_read_pwrst(struct powerdomain *pwrdm) OMAP2_PM_PWSTST, OMAP_POWERSTATEST_MASK); } +static int omap2_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_onstate_mask(bank); + + prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, + OMAP2_PM_PWSTCTRL); + + return 0; +} + +static int omap2_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_retst_mask(bank); + + prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, + OMAP2_PM_PWSTCTRL); + + return 0; +} + +static int omap2_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_stst_mask(bank); + + return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTST, m); +} + +static int omap2_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_retst_mask(bank); + + return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL, m); +} + static int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) { u32 v; @@ -52,6 +96,33 @@ static int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) return 0; } +static int omap2_pwrdm_wait_transition(struct powerdomain *pwrdm) +{ + u32 c = 0; + + /* + * REVISIT: pwrdm_wait_transition() may be better implemented + * via a callback and a periodic timer check -- how long do we expect + * powerdomain transitions to take? + */ + + /* XXX Is this udelay() value meaningful? */ + while ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP2_PM_PWSTST) & + OMAP_INTRANSITION_MASK) && + (c++ < PWRDM_TRANSITION_BAILOUT)) + udelay(1); + + if (c > PWRDM_TRANSITION_BAILOUT) { + printk(KERN_ERR "powerdomain: waited too long for " + "powerdomain %s to complete transition\n", pwrdm->name); + return -EAGAIN; + } + + pr_debug("powerdomain: completed transition in %d loops\n", c); + + return 0; +} + /* Applicable only for OMAP3. Not supported on OMAP2 */ static int omap3_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) { @@ -77,11 +148,62 @@ static int omap3_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) OMAP3430_LASTLOGICSTATEENTERED_MASK); } +static int omap3_get_mem_bank_lastmemst_mask(u8 bank) +{ + switch (bank) { + case 0: + return OMAP3430_LASTMEM1STATEENTERED_MASK; + case 1: + return OMAP3430_LASTMEM2STATEENTERED_MASK; + case 2: + return OMAP3430_LASTSHAREDL2CACHEFLATSTATEENTERED_MASK; + case 3: + return OMAP3430_LASTL2FLATMEMSTATEENTERED_MASK; + default: + WARN_ON(1); /* should never happen */ + return -EEXIST; + } + return 0; +} + +static int omap3_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m; + + m = omap3_get_mem_bank_lastmemst_mask(bank); + + return prm_read_mod_bits_shift(pwrdm->prcm_offs, + OMAP3430_PM_PREPWSTST, m); +} + +static int omap3_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) +{ + prm_write_mod_reg(0, pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST); + return 0; +} + +static int omap3_pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) +{ + return prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, + pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL); +} + +static int omap3_pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) +{ + return prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0, + pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL); +} + struct pwrdm_ops omap2_pwrdm_operations = { .pwrdm_set_next_pwrst = omap2_pwrdm_set_next_pwrst, .pwrdm_read_next_pwrst = omap2_pwrdm_read_next_pwrst, .pwrdm_read_pwrst = omap2_pwrdm_read_pwrst, .pwrdm_set_logic_retst = omap2_pwrdm_set_logic_retst, + .pwrdm_set_mem_onst = omap2_pwrdm_set_mem_onst, + .pwrdm_set_mem_retst = omap2_pwrdm_set_mem_retst, + .pwrdm_read_mem_pwrst = omap2_pwrdm_read_mem_pwrst, + .pwrdm_read_mem_retst = omap2_pwrdm_read_mem_retst, + .pwrdm_wait_transition = omap2_pwrdm_wait_transition, }; struct pwrdm_ops omap3_pwrdm_operations = { @@ -93,4 +215,13 @@ struct pwrdm_ops omap3_pwrdm_operations = { .pwrdm_read_logic_pwrst = omap3_pwrdm_read_logic_pwrst, .pwrdm_read_logic_retst = omap3_pwrdm_read_logic_retst, .pwrdm_read_prev_logic_pwrst = omap3_pwrdm_read_prev_logic_pwrst, + .pwrdm_set_mem_onst = omap2_pwrdm_set_mem_onst, + .pwrdm_set_mem_retst = omap2_pwrdm_set_mem_retst, + .pwrdm_read_mem_pwrst = omap2_pwrdm_read_mem_pwrst, + .pwrdm_read_mem_retst = omap2_pwrdm_read_mem_retst, + .pwrdm_read_prev_mem_pwrst = omap3_pwrdm_read_prev_mem_pwrst, + .pwrdm_clear_all_prev_pwrst = omap3_pwrdm_clear_all_prev_pwrst, + .pwrdm_enable_hdwr_sar = omap3_pwrdm_enable_hdwr_sar, + .pwrdm_disable_hdwr_sar = omap3_pwrdm_disable_hdwr_sar, + .pwrdm_wait_transition = omap2_pwrdm_wait_transition, }; diff --git a/arch/arm/mach-omap2/powerdomain44xx.c b/arch/arm/mach-omap2/powerdomain44xx.c index 996790acebc9..123a25f3b96f 100644 --- a/arch/arm/mach-omap2/powerdomain44xx.c +++ b/arch/arm/mach-omap2/powerdomain44xx.c @@ -47,6 +47,14 @@ static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) OMAP4430_LASTPOWERSTATEENTERED_MASK); } +static int omap4_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) +{ + prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK, + (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT), + pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL); + return 0; +} + static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) { u32 v; @@ -58,6 +66,32 @@ static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) return 0; } +static int omap4_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_onstate_mask(bank); + + prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, + OMAP4_PM_PWSTCTRL); + + return 0; +} + +static int omap4_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_retst_mask(bank); + + prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, + OMAP4_PM_PWSTCTRL); + + return 0; +} + static int omap4_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm) { return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST, @@ -70,12 +104,63 @@ static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm) OMAP4430_LOGICRETSTATE_MASK); } +static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_stst_mask(bank); + + return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST, m); +} + +static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m; + + m = omap2_pwrdm_get_mem_bank_retst_mask(bank); + + return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL, m); +} + +static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm) +{ + u32 c = 0; + + /* + * REVISIT: pwrdm_wait_transition() may be better implemented + * via a callback and a periodic timer check -- how long do we expect + * powerdomain transitions to take? + */ + + /* XXX Is this udelay() value meaningful? */ + while ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP4_PM_PWSTST) & + OMAP_INTRANSITION_MASK) && + (c++ < PWRDM_TRANSITION_BAILOUT)) + udelay(1); + + if (c > PWRDM_TRANSITION_BAILOUT) { + printk(KERN_ERR "powerdomain: waited too long for " + "powerdomain %s to complete transition\n", pwrdm->name); + return -EAGAIN; + } + + pr_debug("powerdomain: completed transition in %d loops\n", c); + + return 0; +} + struct pwrdm_ops omap4_pwrdm_operations = { .pwrdm_set_next_pwrst = omap4_pwrdm_set_next_pwrst, .pwrdm_read_next_pwrst = omap4_pwrdm_read_next_pwrst, .pwrdm_read_pwrst = omap4_pwrdm_read_pwrst, .pwrdm_read_prev_pwrst = omap4_pwrdm_read_prev_pwrst, + .pwrdm_set_lowpwrstchange = omap4_pwrdm_set_lowpwrstchange, .pwrdm_set_logic_retst = omap4_pwrdm_set_logic_retst, .pwrdm_read_logic_pwrst = omap4_pwrdm_read_logic_pwrst, .pwrdm_read_logic_retst = omap4_pwrdm_read_logic_retst, + .pwrdm_read_mem_pwrst = omap4_pwrdm_read_mem_pwrst, + .pwrdm_read_mem_retst = omap4_pwrdm_read_mem_retst, + .pwrdm_set_mem_onst = omap4_pwrdm_set_mem_onst, + .pwrdm_set_mem_retst = omap4_pwrdm_set_mem_retst, + .pwrdm_wait_transition = omap4_pwrdm_wait_transition, }; diff --git a/arch/arm/mach-omap2/powerdomains.h b/arch/arm/mach-omap2/powerdomains.h index e57bc41ef4aa..55cd8e6aa104 100644 --- a/arch/arm/mach-omap2/powerdomains.h +++ b/arch/arm/mach-omap2/powerdomains.h @@ -19,4 +19,9 @@ extern struct pwrdm_ops omap2_pwrdm_operations; extern struct pwrdm_ops omap3_pwrdm_operations; extern struct pwrdm_ops omap4_pwrdm_operations; +/* Common Internal functions used across OMAP rev's */ +extern u32 omap2_pwrdm_get_mem_bank_onstate_mask(u8 bank); +extern u32 omap2_pwrdm_get_mem_bank_retst_mask(u8 bank); +extern u32 omap2_pwrdm_get_mem_bank_stst_mask(u8 bank); + #endif /* ARCH_ARM_MACH_OMAP2_POWERDOMAINS */ |