diff options
| -rw-r--r-- | arch/arm/mach-omap2/clock.c | 56 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm.h | 12 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm2xxx.c | 65 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm2xxx.h | 4 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm3xxx.c | 66 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm3xxx.h | 5 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm_common.c | 48 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/io.c | 5 |
8 files changed, 257 insertions, 4 deletions
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c index 9205ea7..2fe57d6 100644 --- a/arch/arm/mach-omap2/clock.c +++ b/arch/arm/mach-omap2/clock.c @@ -33,10 +33,18 @@ #include "soc.h" #include "clockdomain.h" #include "clock.h" +#include "cm.h" #include "cm2xxx.h" #include "cm3xxx.h" #include "cm-regbits-24xx.h" #include "cm-regbits-34xx.h" +#include "common.h" + +/* + * MAX_MODULE_ENABLE_WAIT: maximum of number of microseconds to wait + * for a module to indicate that it is no longer in idle + */ +#define MAX_MODULE_ENABLE_WAIT 100000 u16 cpu_mask; @@ -58,6 +66,40 @@ static DEFINE_SPINLOCK(clockfw_lock); /* Private functions */ + +/** + * _wait_idlest_generic - wait for a module to leave the idle state + * @reg: virtual address of module IDLEST register + * @mask: value to mask against to determine if the module is active + * @idlest: idle state indicator (0 or 1) for the clock + * @name: name of the clock (for printk) + * + * Wait for a module to leave idle, where its idle-status register is + * not inside the CM module. Returns 1 if the module left idle + * promptly, or 0 if the module did not leave idle before the timeout + * elapsed. XXX Deprecated - should be moved into drivers for the + * individual IP block that the IDLEST register exists in. + */ +static int _wait_idlest_generic(void __iomem *reg, u32 mask, u8 idlest, + const char *name) +{ + int i = 0, ena = 0; + + ena = (idlest) ? 0 : mask; + + omap_test_timeout(((__raw_readl(reg) & mask) == ena), + MAX_MODULE_ENABLE_WAIT, i); + + if (i < MAX_MODULE_ENABLE_WAIT) + pr_debug("omap clock: module associated with clock %s ready after %d loops\n", + name, i); + else + pr_err("omap clock: module associated with clock %s didn't enable in %d tries\n", + name, MAX_MODULE_ENABLE_WAIT); + + return (i < MAX_MODULE_ENABLE_WAIT) ? 1 : 0; +}; + /** * _omap2_module_wait_ready - wait for an OMAP module to leave IDLE * @clk: struct clk * belonging to the module @@ -71,7 +113,9 @@ static DEFINE_SPINLOCK(clockfw_lock); static void _omap2_module_wait_ready(struct clk *clk) { void __iomem *companion_reg, *idlest_reg; - u8 other_bit, idlest_bit, idlest_val; + u8 other_bit, idlest_bit, idlest_val, idlest_reg_id; + s16 prcm_mod; + int r; /* Not all modules have multiple clocks that their IDLEST depends on */ if (clk->ops->find_companion) { @@ -82,8 +126,14 @@ static void _omap2_module_wait_ready(struct clk *clk) clk->ops->find_idlest(clk, &idlest_reg, &idlest_bit, &idlest_val); - omap2_cm_wait_idlest(idlest_reg, (1 << idlest_bit), idlest_val, - __clk_get_name(clk)); + r = cm_split_idlest_reg(idlest_reg, &prcm_mod, &idlest_reg_id); + if (r) { + /* IDLEST register not in the CM module */ + _wait_idlest_generic(idlest_reg, (1 << idlest_bit), idlest_val, + clk->name); + } else { + cm_wait_module_ready(prcm_mod, idlest_reg_id, idlest_bit); + }; } /* Public functions */ diff --git a/arch/arm/mach-omap2/cm.h b/arch/arm/mach-omap2/cm.h index b3cee91..e419ecb 100644 --- a/arch/arm/mach-omap2/cm.h +++ b/arch/arm/mach-omap2/cm.h @@ -37,8 +37,18 @@ /** * struct cm_ll_data - fn ptrs to per-SoC CM function implementations + * @split_idlest_reg: ptr to the SoC CM-specific split_idlest_reg impl + * @wait_module_ready: ptr to the SoC CM-specific wait_module_ready impl */ -struct cm_ll_data {}; +struct cm_ll_data { + int (*split_idlest_reg)(void __iomem *idlest_reg, s16 *prcm_inst, + u8 *idlest_reg_id); + int (*wait_module_ready)(s16 prcm_mod, u8 idlest_id, u8 idlest_shift); +}; + +extern int cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst, + u8 *idlest_reg_id); +extern int cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift); extern int cm_register(struct cm_ll_data *cld); extern int cm_unregister(struct cm_ll_data *cld); diff --git a/arch/arm/mach-omap2/cm2xxx.c b/arch/arm/mach-omap2/cm2xxx.c index e96cd70..db65069 100644 --- a/arch/arm/mach-omap2/cm2xxx.c +++ b/arch/arm/mach-omap2/cm2xxx.c @@ -198,6 +198,43 @@ void omap2xxx_cm_apll96_disable(void) _omap2xxx_apll_disable(OMAP24XX_EN_96M_PLL_SHIFT); } +/** + * omap2xxx_cm_split_idlest_reg - split CM_IDLEST reg addr into its components + * @idlest_reg: CM_IDLEST* virtual address + * @prcm_inst: pointer to an s16 to return the PRCM instance offset + * @idlest_reg_id: pointer to a u8 to return the CM_IDLESTx register ID + * + * XXX This function is only needed until absolute register addresses are + * removed from the OMAP struct clk records. + */ +int omap2xxx_cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst, + u8 *idlest_reg_id) +{ + unsigned long offs; + u8 idlest_offs; + int i; + + if (idlest_reg < cm_base || idlest_reg > (cm_base + 0x0fff)) + return -EINVAL; + + idlest_offs = (unsigned long)idlest_reg & 0xff; + for (i = 0; i < ARRAY_SIZE(omap2xxx_cm_idlest_offs); i++) { + if (idlest_offs == omap2xxx_cm_idlest_offs[i]) { + *idlest_reg_id = i + 1; + break; + } + } + + if (i == ARRAY_SIZE(omap2xxx_cm_idlest_offs)) + return -EINVAL; + + offs = idlest_reg - cm_base; + offs &= 0xff00; + *prcm_inst = offs; + + return 0; +} + /* * */ @@ -314,3 +351,31 @@ struct clkdm_ops omap2_clkdm_operations = { .clkdm_clk_enable = omap2xxx_clkdm_clk_enable, .clkdm_clk_disable = omap2xxx_clkdm_clk_disable, }; + +/* + * + */ + +static struct cm_ll_data omap2xxx_cm_ll_data = { + .split_idlest_reg = &omap2xxx_cm_split_idlest_reg, + .wait_module_ready = &omap2xxx_cm_wait_module_ready, +}; + +int __init omap2xxx_cm_init(void) +{ + if (!cpu_is_omap24xx()) + return 0; + + return cm_register(&omap2xxx_cm_ll_data); +} + +static void __exit omap2xxx_cm_exit(void) +{ + if (!cpu_is_omap24xx()) + return; + + /* Should never happen */ + WARN(cm_unregister(&omap2xxx_cm_ll_data), + "%s: cm_ll_data function pointer mismatch\n", __func__); +} +__exitcall(omap2xxx_cm_exit); diff --git a/arch/arm/mach-omap2/cm2xxx.h b/arch/arm/mach-omap2/cm2xxx.h index bce3c4b..4cbb39b 100644 --- a/arch/arm/mach-omap2/cm2xxx.h +++ b/arch/arm/mach-omap2/cm2xxx.h @@ -60,6 +60,10 @@ extern void omap2xxx_cm_set_apll96_auto_low_power_stop(void); extern bool omap2xxx_cm_is_clkdm_in_hwsup(s16 module, u32 mask); extern int omap2xxx_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift); +extern int omap2xxx_cm_split_idlest_reg(void __iomem *idlest_reg, + s16 *prcm_inst, u8 *idlest_reg_id); + +extern int __init omap2xxx_cm_init(void); #endif diff --git a/arch/arm/mach-omap2/cm3xxx.c b/arch/arm/mach-omap2/cm3xxx.c index 8b03ec2..c2086f2 100644 --- a/arch/arm/mach-omap2/cm3xxx.c +++ b/arch/arm/mach-omap2/cm3xxx.c @@ -110,6 +110,44 @@ int omap3xxx_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift) return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY; } +/** + * omap3xxx_cm_split_idlest_reg - split CM_IDLEST reg addr into its components + * @idlest_reg: CM_IDLEST* virtual address + * @prcm_inst: pointer to an s16 to return the PRCM instance offset + * @idlest_reg_id: pointer to a u8 to return the CM_IDLESTx register ID + * + * XXX This function is only needed until absolute register addresses are + * removed from the OMAP struct clk records. + */ +int omap3xxx_cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst, + u8 *idlest_reg_id) +{ + unsigned long offs; + u8 idlest_offs; + int i; + + if (idlest_reg < (cm_base + OMAP3430_IVA2_MOD) || + idlest_reg > (cm_base + 0x1ffff)) + return -EINVAL; + + idlest_offs = (unsigned long)idlest_reg & 0xff; + for (i = 0; i < ARRAY_SIZE(omap3xxx_cm_idlest_offs); i++) { + if (idlest_offs == omap3xxx_cm_idlest_offs[i]) { + *idlest_reg_id = i + 1; + break; + } + } + + if (i == ARRAY_SIZE(omap3xxx_cm_idlest_offs)) + return -EINVAL; + + offs = idlest_reg - cm_base; + offs &= 0xff00; + *prcm_inst = offs; + + return 0; +} + /* Clockdomain low-level operations */ static int omap3xxx_clkdm_add_sleepdep(struct clockdomain *clkdm1, @@ -597,3 +635,31 @@ void omap3_cm_restore_context(void) omap2_cm_write_mod_reg(cm_context.cm_clkout_ctrl, OMAP3430_CCR_MOD, OMAP3_CM_CLKOUT_CTRL_OFFSET); } + +/* + * + */ + +static struct cm_ll_data omap3xxx_cm_ll_data = { + .split_idlest_reg = &omap3xxx_cm_split_idlest_reg, + .wait_module_ready = &omap3xxx_cm_wait_module_ready, +}; + +int __init omap3xxx_cm_init(void) +{ + if (!cpu_is_omap34xx()) + return 0; + + return cm_register(&omap3xxx_cm_ll_data); +} + +static void __exit omap3xxx_cm_exit(void) +{ + if (!cpu_is_omap34xx()) + return; + + /* Should never happen */ + WARN(cm_unregister(&omap3xxx_cm_ll_data), + "%s: cm_ll_data function pointer mismatch\n", __func__); +} +__exitcall(omap3xxx_cm_exit); diff --git a/arch/arm/mach-omap2/cm3xxx.h b/arch/arm/mach-omap2/cm3xxx.h index 4a6ac81..e8e146f 100644 --- a/arch/arm/mach-omap2/cm3xxx.h +++ b/arch/arm/mach-omap2/cm3xxx.h @@ -78,9 +78,14 @@ extern bool omap3xxx_cm_is_clkdm_in_hwsup(s16 module, u32 mask); extern int omap3xxx_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift); +extern int omap3xxx_cm_split_idlest_reg(void __iomem *idlest_reg, + s16 *prcm_inst, u8 *idlest_reg_id); + extern void omap3_cm_save_context(void); extern void omap3_cm_restore_context(void); +extern int __init omap3xxx_cm_init(void); + #endif #endif diff --git a/arch/arm/mach-omap2/cm_common.c b/arch/arm/mach-omap2/cm_common.c index 3246cef..561969bb 100644 --- a/arch/arm/mach-omap2/cm_common.c +++ b/arch/arm/mach-omap2/cm_common.c @@ -26,6 +26,54 @@ static struct cm_ll_data null_cm_ll_data; static struct cm_ll_data *cm_ll_data = &null_cm_ll_data; /** + * cm_split_idlest_reg - split CM_IDLEST reg addr into its components + * @idlest_reg: CM_IDLEST* virtual address + * @prcm_inst: pointer to an s16 to return the PRCM instance offset + * @idlest_reg_id: pointer to a u8 to return the CM_IDLESTx register ID + * + * Given an absolute CM_IDLEST register address @idlest_reg, passes + * the PRCM instance offset and IDLEST register ID back to the caller + * via the @prcm_inst and @idlest_reg_id. Returns -EINVAL upon error, + * or 0 upon success. XXX This function is only needed until absolute + * register addresses are removed from the OMAP struct clk records. + */ +int cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst, + u8 *idlest_reg_id) +{ + if (!cm_ll_data->split_idlest_reg) { + WARN_ONCE(1, "cm: %s: no low-level function defined\n", + __func__); + return -EINVAL; + } + + return cm_ll_data->split_idlest_reg(idlest_reg, prcm_inst, + idlest_reg_id); +} + +/** + * cm_wait_module_ready - wait for a module to leave idle or standby + * @prcm_mod: PRCM module offset + * @idlest_id: CM_IDLESTx register ID (i.e., x = 1, 2, 3) + * @idlest_shift: shift of the bit in the CM_IDLEST* register to check + * + * Wait for the PRCM to indicate that the module identified by + * (@prcm_mod, @idlest_id, @idlest_shift) is clocked. Return 0 upon + * success, -EBUSY if the module doesn't enable in time, or -EINVAL if + * no per-SoC wait_module_ready() function pointer has been registered + * or if the idlest register is unknown on the SoC. + */ +int cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift) +{ + if (!cm_ll_data->wait_module_ready) { + WARN_ONCE(1, "cm: %s: no low-level function defined\n", + __func__); + return -EINVAL; + } + + return cm_ll_data->wait_module_ready(prcm_mod, idlest_id, idlest_shift); +} + +/** * cm_register - register per-SoC low-level data with the CM * @cld: low-level per-SoC OMAP CM data & function pointers to register * diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index a204b70..772dc7e 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -45,6 +45,8 @@ #include "sdrc.h" #include "control.h" #include "serial.h" +#include "cm2xxx.h" +#include "cm3xxx.h" /* * The machine specific code may provide the extra mapping besides the @@ -388,6 +390,7 @@ void __init omap2420_init_early(void) OMAP2_L4_IO_ADDRESS(OMAP2420_CM_BASE), NULL, NULL); omap2xxx_check_revision(); + omap2xxx_cm_init(); omap_common_init_early(); omap2xxx_voltagedomains_init(); omap242x_powerdomains_init(); @@ -417,6 +420,7 @@ void __init omap2430_init_early(void) OMAP2_L4_IO_ADDRESS(OMAP2430_CM_BASE), NULL, NULL); omap2xxx_check_revision(); + omap2xxx_cm_init(); omap_common_init_early(); omap2xxx_voltagedomains_init(); omap243x_powerdomains_init(); @@ -451,6 +455,7 @@ void __init omap3_init_early(void) NULL, NULL); omap3xxx_check_revision(); omap3xxx_check_features(); + omap3xxx_cm_init(); omap_common_init_early(); omap3xxx_voltagedomains_init(); omap3xxx_powerdomains_init(); |
