diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 1096 |
1 files changed, 845 insertions, 251 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 478ae585ca39..5a30658444d0 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -1,22 +1,114 @@ /* * omap_hwmod implementation for OMAP2/3/4 * - * Copyright (C) 2009 Nokia Corporation - * Paul Walmsley - * With fixes and testing from Kevin Hilman + * Copyright (C) 2009-2010 Nokia Corporation * - * Created in collaboration with (alphabetical order): Benoit Cousson, - * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari - * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff + * Paul Walmsley, Benoît Cousson, Kevin Hilman + * + * Created in collaboration with (alphabetical order): Thara Gopinath, + * Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari Poussa, Anand + * Sawant, Santosh Shilimkar, Richard Woodruff * * 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. * - * This code manages "OMAP modules" (on-chip devices) and their - * integration with Linux device driver and bus code. + * Introduction + * ------------ + * One way to view an OMAP SoC is as a collection of largely unrelated + * IP blocks connected by interconnects. The IP blocks include + * devices such as ARM processors, audio serial interfaces, UARTs, + * etc. Some of these devices, like the DSP, are created by TI; + * others, like the SGX, largely originate from external vendors. In + * TI's documentation, on-chip devices are referred to as "OMAP + * modules." Some of these IP blocks are identical across several + * OMAP versions. Others are revised frequently. + * + * These OMAP modules are tied together by various interconnects. + * Most of the address and data flow between modules is via OCP-based + * interconnects such as the L3 and L4 buses; but there are other + * interconnects that distribute the hardware clock tree, handle idle + * and reset signaling, supply power, and connect the modules to + * various pads or balls on the OMAP package. + * + * OMAP hwmod provides a consistent way to describe the on-chip + * hardware blocks and their integration into the rest of the chip. + * This description can be automatically generated from the TI + * hardware database. OMAP hwmod provides a standard, consistent API + * to reset, enable, idle, and disable these hardware blocks. And + * hwmod provides a way for other core code, such as the Linux device + * code or the OMAP power management and address space mapping code, + * to query the hardware database. + * + * Using hwmod + * ----------- + * Drivers won't call hwmod functions directly. That is done by the + * omap_device code, and in rare occasions, by custom integration code + * in arch/arm/ *omap*. The omap_device code includes functions to + * build a struct platform_device using omap_hwmod data, and that is + * currently how hwmod data is communicated to drivers and to the + * Linux driver model. Most drivers will call omap_hwmod functions only + * indirectly, via pm_runtime*() functions. + * + * From a layering perspective, here is where the OMAP hwmod code + * fits into the kernel software stack: + * + * +-------------------------------+ + * | Device driver code | + * | (e.g., drivers/) | + * +-------------------------------+ + * | Linux driver model | + * | (platform_device / | + * | platform_driver data/code) | + * +-------------------------------+ + * | OMAP core-driver integration | + * |(arch/arm/mach-omap2/devices.c)| + * +-------------------------------+ + * | omap_device code | + * | (../plat-omap/omap_device.c) | + * +-------------------------------+ + * ----> | omap_hwmod code/data | <----- + * | (../mach-omap2/omap_hwmod*) | + * +-------------------------------+ + * | OMAP clock/PRCM/register fns | + * | (__raw_{read,write}l, clk*) | + * +-------------------------------+ + * + * Device drivers should not contain any OMAP-specific code or data in + * them. They should only contain code to operate the IP block that + * the driver is responsible for. This is because these IP blocks can + * also appear in other SoCs, either from TI (such as DaVinci) or from + * other manufacturers; and drivers should be reusable across other + * platforms. + * + * The OMAP hwmod code also will attempt to reset and idle all on-chip + * devices upon boot. The goal here is for the kernel to be + * completely self-reliant and independent from bootloaders. This is + * to ensure a repeatable configuration, both to ensure consistent + * runtime behavior, and to make it easier for others to reproduce + * bugs. + * + * OMAP module activity states + * --------------------------- + * The hwmod code considers modules to be in one of several activity + * states. IP blocks start out in an UNKNOWN state, then once they + * are registered via the hwmod code, proceed to the REGISTERED state. + * Once their clock names are resolved to clock pointers, the module + * enters the CLKS_INITED state; and finally, once the module has been + * reset and the integration registers programmed, the INITIALIZED state + * is entered. The hwmod code will then place the module into either + * the IDLE state to save power, or in the case of a critical system + * module, the ENABLED state. + * + * OMAP core integration code can then call omap_hwmod*() functions + * directly to move the module between the IDLE, ENABLED, and DISABLED + * states, as needed. This is done during both the PM idle loop, and + * in the OMAP core integration code's implementation of the PM runtime + * functions. * - * References: + * References + * ---------- + * This is a partial list. * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064) * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090) * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108) @@ -43,7 +135,6 @@ #include <linux/err.h> #include <linux/list.h> #include <linux/mutex.h> -#include <linux/bootmem.h> #include <plat/common.h> #include <plat/cpu.h> @@ -51,14 +142,16 @@ #include <plat/powerdomain.h> #include <plat/clock.h> #include <plat/omap_hwmod.h> +#include <plat/prcm.h> #include "cm.h" +#include "prm.h" -/* Maximum microseconds to wait for OMAP module to reset */ -#define MAX_MODULE_RESET_WAIT 10000 +/* Maximum microseconds to wait for OMAP module to softreset */ +#define MAX_MODULE_SOFTRESET_WAIT 10000 /* Name of the OMAP hwmod for the MPU */ -#define MPU_INITIATOR_NAME "mpu_hwmod" +#define MPU_INITIATOR_NAME "mpu" /* omap_hwmod_list contains all registered struct omap_hwmods */ static LIST_HEAD(omap_hwmod_list); @@ -84,17 +177,16 @@ static u8 inited; */ static int _update_sysc_cache(struct omap_hwmod *oh) { - if (!oh->sysconfig) { - WARN(!oh->sysconfig, "omap_hwmod: %s: cannot read " - "OCP_SYSCONFIG: not defined on hwmod\n", oh->name); + if (!oh->class->sysc) { + WARN(1, "omap_hwmod: %s: cannot read OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name); return -EINVAL; } /* XXX ensure module interface clock is up */ - oh->_sysc_cache = omap_hwmod_readl(oh, oh->sysconfig->sysc_offs); + oh->_sysc_cache = omap_hwmod_read(oh, oh->class->sysc->sysc_offs); - if (!(oh->sysconfig->sysc_flags & SYSC_NO_CACHE)) + if (!(oh->class->sysc->sysc_flags & SYSC_NO_CACHE)) oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED; return 0; @@ -105,14 +197,13 @@ static int _update_sysc_cache(struct omap_hwmod *oh) * @v: OCP_SYSCONFIG value to write * @oh: struct omap_hwmod * * - * Write @v into the module OCP_SYSCONFIG register, if it has one. No - * return value. + * Write @v into the module class' OCP_SYSCONFIG register, if it has + * one. No return value. */ static void _write_sysconfig(u32 v, struct omap_hwmod *oh) { - if (!oh->sysconfig) { - WARN(!oh->sysconfig, "omap_hwmod: %s: cannot write " - "OCP_SYSCONFIG: not defined on hwmod\n", oh->name); + if (!oh->class->sysc) { + WARN(1, "omap_hwmod: %s: cannot write OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name); return; } @@ -120,7 +211,7 @@ static void _write_sysconfig(u32 v, struct omap_hwmod *oh) if (oh->_sysc_cache != v) { oh->_sysc_cache = v; - omap_hwmod_writel(v, oh, oh->sysconfig->sysc_offs); + omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs); } } @@ -137,12 +228,23 @@ static void _write_sysconfig(u32 v, struct omap_hwmod *oh) static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode, u32 *v) { - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE)) + u32 mstandby_mask; + u8 mstandby_shift; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_MIDLEMODE)) + return -EINVAL; + + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); return -EINVAL; + } + + mstandby_shift = oh->class->sysc->sysc_fields->midle_shift; + mstandby_mask = (0x3 << mstandby_shift); - *v &= ~SYSC_MIDLEMODE_MASK; - *v |= __ffs(standbymode) << SYSC_MIDLEMODE_SHIFT; + *v &= ~mstandby_mask; + *v |= __ffs(standbymode) << mstandby_shift; return 0; } @@ -159,12 +261,23 @@ static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode, */ static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v) { - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE)) + u32 sidle_mask; + u8 sidle_shift; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_SIDLEMODE)) + return -EINVAL; + + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); return -EINVAL; + } + + sidle_shift = oh->class->sysc->sysc_fields->sidle_shift; + sidle_mask = (0x3 << sidle_shift); - *v &= ~SYSC_SIDLEMODE_MASK; - *v |= __ffs(idlemode) << SYSC_SIDLEMODE_SHIFT; + *v &= ~sidle_mask; + *v |= __ffs(idlemode) << sidle_shift; return 0; } @@ -182,12 +295,23 @@ static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v) */ static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v) { - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY)) + u32 clkact_mask; + u8 clkact_shift; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_CLOCKACTIVITY)) + return -EINVAL; + + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); return -EINVAL; + } + + clkact_shift = oh->class->sysc->sysc_fields->clkact_shift; + clkact_mask = (0x3 << clkact_shift); - *v &= ~SYSC_CLOCKACTIVITY_MASK; - *v |= clockact << SYSC_CLOCKACTIVITY_SHIFT; + *v &= ~clkact_mask; + *v |= clockact << clkact_shift; return 0; } @@ -202,11 +326,20 @@ static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v) */ static int _set_softreset(struct omap_hwmod *oh, u32 *v) { - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET)) + u32 softrst_mask; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET)) + return -EINVAL; + + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); return -EINVAL; + } + + softrst_mask = (0x1 << oh->class->sysc->sysc_fields->srst_shift); - *v |= SYSC_SOFTRESET_MASK; + *v |= softrst_mask; return 0; } @@ -227,12 +360,23 @@ static int _set_softreset(struct omap_hwmod *oh, u32 *v) static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, u32 *v) { - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_AUTOIDLE)) + u32 autoidle_mask; + u8 autoidle_shift; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_AUTOIDLE)) + return -EINVAL; + + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); return -EINVAL; + } + + autoidle_shift = oh->class->sysc->sysc_fields->autoidle_shift; + autoidle_mask = (0x3 << autoidle_shift); - *v &= ~SYSC_AUTOIDLE_MASK; - *v |= autoidle << SYSC_AUTOIDLE_SHIFT; + *v &= ~autoidle_mask; + *v |= autoidle << autoidle_shift; return 0; } @@ -246,14 +390,21 @@ static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, */ static int _enable_wakeup(struct omap_hwmod *oh) { - u32 v; + u32 v, wakeup_mask; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) + return -EINVAL; - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP)) + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); return -EINVAL; + } + + wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift); v = oh->_sysc_cache; - v |= SYSC_ENAWAKEUP_MASK; + v |= wakeup_mask; _write_sysconfig(v, oh); /* XXX test pwrdm_get_wken for this hwmod's subsystem */ @@ -272,14 +423,21 @@ static int _enable_wakeup(struct omap_hwmod *oh) */ static int _disable_wakeup(struct omap_hwmod *oh) { - u32 v; + u32 v, wakeup_mask; - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP)) + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) return -EINVAL; + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); + return -EINVAL; + } + + wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift); + v = oh->_sysc_cache; - v &= ~SYSC_ENAWAKEUP_MASK; + v &= ~wakeup_mask; _write_sysconfig(v, oh); /* XXX test pwrdm_get_wken for this hwmod's subsystem */ @@ -299,15 +457,14 @@ static int _disable_wakeup(struct omap_hwmod *oh) * be accessed by the IVA, there should be a sleepdep between the IVA * initiator and the module). Only applies to modules in smart-idle * mode. Returns -EINVAL upon error or passes along - * pwrdm_add_sleepdep() value upon success. + * clkdm_add_sleepdep() value upon success. */ static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) { if (!oh->_clk) return -EINVAL; - return pwrdm_add_sleepdep(oh->_clk->clkdm->pwrdm.ptr, - init_oh->_clk->clkdm->pwrdm.ptr); + return clkdm_add_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); } /** @@ -320,15 +477,14 @@ static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) * be accessed by the IVA, there should be no sleepdep between the IVA * initiator and the module). Only applies to modules in smart-idle * mode. Returns -EINVAL upon error or passes along - * pwrdm_add_sleepdep() value upon success. + * clkdm_del_sleepdep() value upon success. */ static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) { if (!oh->_clk) return -EINVAL; - return pwrdm_del_sleepdep(oh->_clk->clkdm->pwrdm.ptr, - init_oh->_clk->clkdm->pwrdm.ptr); + return clkdm_del_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); } /** @@ -341,27 +497,27 @@ static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) */ static int _init_main_clk(struct omap_hwmod *oh) { - struct clk *c; int ret = 0; - if (!oh->clkdev_con_id) + if (!oh->main_clk) return 0; - c = clk_get_sys(oh->clkdev_dev_id, oh->clkdev_con_id); - WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get main_clk %s.%s\n", - oh->name, oh->clkdev_dev_id, oh->clkdev_con_id); - if (IS_ERR(c)) - ret = -EINVAL; - oh->_clk = c; + oh->_clk = omap_clk_get_by_name(oh->main_clk); + if (!oh->_clk) { + pr_warning("omap_hwmod: %s: cannot clk_get main_clk %s\n", + oh->name, oh->main_clk); + return -EINVAL; + } - WARN(!c->clkdm, "omap_hwmod: %s: missing clockdomain for %s.\n", - oh->clkdev_con_id, c->name); + if (!oh->_clk->clkdm) + pr_warning("omap_hwmod: %s: missing clockdomain for %s.\n", + oh->main_clk, oh->_clk->name); return ret; } /** - * _init_interface_clk - get a struct clk * for the the hwmod's interface clks + * _init_interface_clks - get a struct clk * for the the hwmod's interface clks * @oh: struct omap_hwmod * * * Called from _init_clocks(). Populates the @oh OCP slave interface @@ -369,7 +525,6 @@ static int _init_main_clk(struct omap_hwmod *oh) */ static int _init_interface_clks(struct omap_hwmod *oh) { - struct omap_hwmod_ocp_if *os; struct clk *c; int i; int ret = 0; @@ -377,16 +532,18 @@ static int _init_interface_clks(struct omap_hwmod *oh) if (oh->slaves_cnt == 0) return 0; - for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) { - if (!os->clkdev_con_id) + for (i = 0; i < oh->slaves_cnt; i++) { + struct omap_hwmod_ocp_if *os = oh->slaves[i]; + + if (!os->clk) continue; - c = clk_get_sys(os->clkdev_dev_id, os->clkdev_con_id); - WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get " - "interface_clk %s.%s\n", oh->name, - os->clkdev_dev_id, os->clkdev_con_id); - if (IS_ERR(c)) + c = omap_clk_get_by_name(os->clk); + if (!c) { + pr_warning("omap_hwmod: %s: cannot clk_get interface_clk %s\n", + oh->name, os->clk); ret = -EINVAL; + } os->_clk = c; } @@ -408,12 +565,12 @@ static int _init_opt_clks(struct omap_hwmod *oh) int ret = 0; for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) { - c = clk_get_sys(oc->clkdev_dev_id, oc->clkdev_con_id); - WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get opt_clk " - "%s.%s\n", oh->name, oc->clkdev_dev_id, - oc->clkdev_con_id); - if (IS_ERR(c)) + c = omap_clk_get_by_name(oc->clk); + if (!c) { + pr_warning("omap_hwmod: %s: cannot clk_get opt_clk %s\n", + oh->name, oc->clk); ret = -EINVAL; + } oc->_clk = c; } @@ -429,19 +586,19 @@ static int _init_opt_clks(struct omap_hwmod *oh) */ static int _enable_clocks(struct omap_hwmod *oh) { - struct omap_hwmod_ocp_if *os; int i; pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name); - if (oh->_clk && !IS_ERR(oh->_clk)) + if (oh->_clk) clk_enable(oh->_clk); if (oh->slaves_cnt > 0) { - for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) { + for (i = 0; i < oh->slaves_cnt; i++) { + struct omap_hwmod_ocp_if *os = oh->slaves[i]; struct clk *c = os->_clk; - if (c && !IS_ERR(c) && (os->flags & OCPIF_SWSUP_IDLE)) + if (c && (os->flags & OCPIF_SWSUP_IDLE)) clk_enable(c); } } @@ -459,19 +616,19 @@ static int _enable_clocks(struct omap_hwmod *oh) */ static int _disable_clocks(struct omap_hwmod *oh) { - struct omap_hwmod_ocp_if *os; int i; pr_debug("omap_hwmod: %s: disabling clocks\n", oh->name); - if (oh->_clk && !IS_ERR(oh->_clk)) + if (oh->_clk) clk_disable(oh->_clk); if (oh->slaves_cnt > 0) { - for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) { + for (i = 0; i < oh->slaves_cnt; i++) { + struct omap_hwmod_ocp_if *os = oh->slaves[i]; struct clk *c = os->_clk; - if (c && !IS_ERR(c) && (os->flags & OCPIF_SWSUP_IDLE)) + if (c && (os->flags & OCPIF_SWSUP_IDLE)) clk_disable(c); } } @@ -481,6 +638,36 @@ static int _disable_clocks(struct omap_hwmod *oh) return 0; } +static void _enable_optional_clocks(struct omap_hwmod *oh) +{ + struct omap_hwmod_opt_clk *oc; + int i; + + pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh->name); + + for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) + if (oc->_clk) { + pr_debug("omap_hwmod: enable %s:%s\n", oc->role, + oc->_clk->name); + clk_enable(oc->_clk); + } +} + +static void _disable_optional_clocks(struct omap_hwmod *oh) +{ + struct omap_hwmod_opt_clk *oc; + int i; + + pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh->name); + + for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) + if (oc->_clk) { + pr_debug("omap_hwmod: disable %s:%s\n", oc->role, + oc->_clk->name); + clk_disable(oc->_clk); + } +} + /** * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use * @oh: struct omap_hwmod * @@ -490,14 +677,15 @@ static int _disable_clocks(struct omap_hwmod *oh) */ static int _find_mpu_port_index(struct omap_hwmod *oh) { - struct omap_hwmod_ocp_if *os; int i; int found = 0; if (!oh || oh->slaves_cnt == 0) return -EINVAL; - for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) { + for (i = 0; i < oh->slaves_cnt; i++) { + struct omap_hwmod_ocp_if *os = oh->slaves[i]; + if (os->user & OCP_USER_MPU) { found = 1; break; @@ -532,7 +720,7 @@ static void __iomem *_find_mpu_rt_base(struct omap_hwmod *oh, u8 index) if (!oh || oh->slaves_cnt == 0) return NULL; - os = *oh->slaves + index; + os = oh->slaves[index]; for (i = 0, mem = os->addr; i < os->addr_cnt; i++, mem++) { if (mem->flags & ADDR_TYPE_RT) { @@ -558,7 +746,7 @@ static void __iomem *_find_mpu_rt_base(struct omap_hwmod *oh, u8 index) } /** - * _sysc_enable - try to bring a module out of idle via OCP_SYSCONFIG + * _enable_sysc - try to bring a module out of idle via OCP_SYSCONFIG * @oh: struct omap_hwmod * * * If module is marked as SWSUP_SIDLE, force the module out of slave @@ -566,50 +754,58 @@ static void __iomem *_find_mpu_rt_base(struct omap_hwmod *oh, u8 index) * as SWSUP_MSUSPEND, force the module out of master standby; * otherwise, configure it for smart-standby. No return value. */ -static void _sysc_enable(struct omap_hwmod *oh) +static void _enable_sysc(struct omap_hwmod *oh) { - u8 idlemode; + u8 idlemode, sf; u32 v; - if (!oh->sysconfig) + if (!oh->class->sysc) return; v = oh->_sysc_cache; + sf = oh->class->sysc->sysc_flags; - if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE) { + if (sf & SYSC_HAS_SIDLEMODE) { idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ? HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART; _set_slave_idlemode(oh, idlemode, &v); } - if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) { + if (sf & SYSC_HAS_MIDLEMODE) { idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ? HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART; _set_master_standbymode(oh, idlemode, &v); } - if (oh->sysconfig->sysc_flags & SYSC_HAS_AUTOIDLE) { - idlemode = (oh->flags & HWMOD_NO_OCP_AUTOIDLE) ? - 0 : 1; - _set_module_autoidle(oh, idlemode, &v); - } - - /* XXX OCP ENAWAKEUP bit? */ - /* * XXX The clock framework should handle this, by * calling into this code. But this must wait until the * clock structures are tagged with omap_hwmod entries */ - if (oh->flags & HWMOD_SET_DEFAULT_CLOCKACT && - oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY) - _set_clockactivity(oh, oh->sysconfig->clockact, &v); + if ((oh->flags & HWMOD_SET_DEFAULT_CLOCKACT) && + (sf & SYSC_HAS_CLOCKACTIVITY)) + _set_clockactivity(oh, oh->class->sysc->clockact, &v); _write_sysconfig(v, oh); + + /* If slave is in SMARTIDLE, also enable wakeup */ + if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE)) + _enable_wakeup(oh); + + /* + * Set the autoidle bit only after setting the smartidle bit + * Setting this will not have any impact on the other modules. + */ + if (sf & SYSC_HAS_AUTOIDLE) { + idlemode = (oh->flags & HWMOD_NO_OCP_AUTOIDLE) ? + 0 : 1; + _set_module_autoidle(oh, idlemode, &v); + _write_sysconfig(v, oh); + } } /** - * _sysc_idle - try to put a module into idle via OCP_SYSCONFIG + * _idle_sysc - try to put a module into idle via OCP_SYSCONFIG * @oh: struct omap_hwmod * * * If module is marked as SWSUP_SIDLE, force the module into slave @@ -617,23 +813,24 @@ static void _sysc_enable(struct omap_hwmod *oh) * as SWSUP_MSUSPEND, force the module into master standby; otherwise, * configure it for smart-standby. No return value. */ -static void _sysc_idle(struct omap_hwmod *oh) +static void _idle_sysc(struct omap_hwmod *oh) { - u8 idlemode; + u8 idlemode, sf; u32 v; - if (!oh->sysconfig) + if (!oh->class->sysc) return; v = oh->_sysc_cache; + sf = oh->class->sysc->sysc_flags; - if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE) { + if (sf & SYSC_HAS_SIDLEMODE) { idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ? HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART; _set_slave_idlemode(oh, idlemode, &v); } - if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) { + if (sf & SYSC_HAS_MIDLEMODE) { idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ? HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART; _set_master_standbymode(oh, idlemode, &v); @@ -643,28 +840,30 @@ static void _sysc_idle(struct omap_hwmod *oh) } /** - * _sysc_shutdown - force a module into idle via OCP_SYSCONFIG + * _shutdown_sysc - force a module into idle via OCP_SYSCONFIG * @oh: struct omap_hwmod * * * Force the module into slave idle and master suspend. No return * value. */ -static void _sysc_shutdown(struct omap_hwmod *oh) +static void _shutdown_sysc(struct omap_hwmod *oh) { u32 v; + u8 sf; - if (!oh->sysconfig) + if (!oh->class->sysc) return; v = oh->_sysc_cache; + sf = oh->class->sysc->sysc_flags; - if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE) + if (sf & SYSC_HAS_SIDLEMODE) _set_slave_idlemode(oh, HWMOD_IDLEMODE_FORCE, &v); - if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) + if (sf & SYSC_HAS_MIDLEMODE) _set_master_standbymode(oh, HWMOD_IDLEMODE_FORCE, &v); - if (oh->sysconfig->sysc_flags & SYSC_HAS_AUTOIDLE) + if (sf & SYSC_HAS_AUTOIDLE) _set_module_autoidle(oh, 1, &v); _write_sysconfig(v, oh); @@ -696,14 +895,15 @@ static struct omap_hwmod *_lookup(const char *name) /** * _init_clocks - clk_get() all clocks associated with this hwmod * @oh: struct omap_hwmod * + * @data: not used; pass NULL * * Called by omap_hwmod_late_init() (after omap2_clk_init()). - * Resolves all clock names embedded in the hwmod. Must be called - * with omap_hwmod_mutex held. Returns -EINVAL if the omap_hwmod - * has not yet been registered or if the clocks have already been - * initialized, 0 on success, or a non-zero error on failure. + * Resolves all clock names embedded in the hwmod. Returns -EINVAL if + * the omap_hwmod has not yet been registered or if the clocks have + * already been initialized, 0 on success, or a non-zero error on + * failure. */ -static int _init_clocks(struct omap_hwmod *oh) +static int _init_clocks(struct omap_hwmod *oh, void *data) { int ret = 0; @@ -716,9 +916,10 @@ static int _init_clocks(struct omap_hwmod *oh) ret |= _init_interface_clks(oh); ret |= _init_opt_clks(oh); - oh->_state = _HWMOD_STATE_CLKS_INITED; + if (!ret) + oh->_state = _HWMOD_STATE_CLKS_INITED; - return ret; + return 0; } /** @@ -741,9 +942,9 @@ static int _wait_target_ready(struct omap_hwmod *oh) if (oh->_int_flags & _HWMOD_NO_MPU_PORT) return 0; - os = *oh->slaves + oh->_mpu_port_index; + os = oh->slaves[oh->_mpu_port_index]; - if (!(os->flags & OCPIF_HAS_IDLEST)) + if (oh->flags & HWMOD_NO_IDLEST) return 0; /* XXX check module SIDLEMODE */ @@ -754,11 +955,8 @@ static int _wait_target_ready(struct omap_hwmod *oh) ret = omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs, oh->prcm.omap2.idlest_reg_id, oh->prcm.omap2.idlest_idle_bit); -#if 0 } else if (cpu_is_omap44xx()) { - ret = omap4_cm_wait_module_ready(oh->prcm.omap4.module_offs, - oh->prcm.omap4.device_offs); -#endif + ret = omap4_cm_wait_module_ready(oh->prcm.omap4.clkctrl_reg); } else { BUG(); }; @@ -767,68 +965,216 @@ static int _wait_target_ready(struct omap_hwmod *oh) } /** + * _lookup_hardreset - return the register bit shift for this hwmod/reset line + * @oh: struct omap_hwmod * + * @name: name of the reset line in the context of this hwmod + * + * Return the bit position of the reset line that match the + * input name. Return -ENOENT if not found. + */ +static u8 _lookup_hardreset(struct omap_hwmod *oh, const char *name) +{ + int i; + + for (i = 0; i < oh->rst_lines_cnt; i++) { + const char *rst_line = oh->rst_lines[i].name; + if (!strcmp(rst_line, name)) { + u8 shift = oh->rst_lines[i].rst_shift; + pr_debug("omap_hwmod: %s: _lookup_hardreset: %s: %d\n", + oh->name, rst_line, shift); + + return shift; + } + } + + return -ENOENT; +} + +/** + * _assert_hardreset - assert the HW reset line of submodules + * contained in the hwmod module. + * @oh: struct omap_hwmod * + * @name: name of the reset line to lookup and assert + * + * Some IP like dsp, ipu or iva contain processor that require + * an HW reset line to be assert / deassert in order to enable fully + * the IP. + */ +static int _assert_hardreset(struct omap_hwmod *oh, const char *name) +{ + u8 shift; + + if (!oh) + return -EINVAL; + + shift = _lookup_hardreset(oh, name); + if (IS_ERR_VALUE(shift)) + return shift; + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) + return omap2_prm_assert_hardreset(oh->prcm.omap2.module_offs, + shift); + else if (cpu_is_omap44xx()) + return omap4_prm_assert_hardreset(oh->prcm.omap4.rstctrl_reg, + shift); + else + return -EINVAL; +} + +/** + * _deassert_hardreset - deassert the HW reset line of submodules contained + * in the hwmod module. + * @oh: struct omap_hwmod * + * @name: name of the reset line to look up and deassert + * + * Some IP like dsp, ipu or iva contain processor that require + * an HW reset line to be assert / deassert in order to enable fully + * the IP. + */ +static int _deassert_hardreset(struct omap_hwmod *oh, const char *name) +{ + u8 shift; + int r; + + if (!oh) + return -EINVAL; + + shift = _lookup_hardreset(oh, name); + if (IS_ERR_VALUE(shift)) + return shift; + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) + r = omap2_prm_deassert_hardreset(oh->prcm.omap2.module_offs, + shift); + else if (cpu_is_omap44xx()) + r = omap4_prm_deassert_hardreset(oh->prcm.omap4.rstctrl_reg, + shift); + else + return -EINVAL; + + if (r == -EBUSY) + pr_warning("omap_hwmod: %s: failed to hardreset\n", oh->name); + + return r; +} + +/** + * _read_hardreset - read the HW reset line state of submodules + * contained in the hwmod module + * @oh: struct omap_hwmod * + * @name: name of the reset line to look up and read + * + * Return the state of the reset line. + */ +static int _read_hardreset(struct omap_hwmod *oh, const char *name) +{ + u8 shift; + + if (!oh) + return -EINVAL; + + shift = _lookup_hardreset(oh, name); + if (IS_ERR_VALUE(shift)) + return shift; + + if (cpu_is_omap24xx() || cpu_is_omap34xx()) { + return omap2_prm_is_hardreset_asserted(oh->prcm.omap2.module_offs, + shift); + } else if (cpu_is_omap44xx()) { + return omap4_prm_is_hardreset_asserted(oh->prcm.omap4.rstctrl_reg, + shift); + } else { + return -EINVAL; + } +} + +/** * _reset - reset an omap_hwmod * @oh: struct omap_hwmod * * * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be - * enabled for this to work. Must be called with omap_hwmod_mutex - * held. Returns -EINVAL if the hwmod cannot be reset this way or if - * the hwmod is in the wrong state, -ETIMEDOUT if the module did not - * reset in time, or 0 upon success. + * enabled for this to work. Returns -EINVAL if the hwmod cannot be + * reset this way or if the hwmod is in the wrong state, -ETIMEDOUT if + * the module did not reset in time, or 0 upon success. + * + * In OMAP3 a specific SYSSTATUS register is used to get the reset status. + * Starting in OMAP4, some IPs does not have SYSSTATUS register and instead + * use the SYSCONFIG softreset bit to provide the status. + * + * Note that some IP like McBSP does have a reset control but no reset status. */ static int _reset(struct omap_hwmod *oh) { - u32 r, v; + u32 v; int c = 0; + int ret = 0; - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET) || - (oh->sysconfig->sysc_flags & SYSS_MISSING)) + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET)) return -EINVAL; /* clocks must be on for this operation */ if (oh->_state != _HWMOD_STATE_ENABLED) { - WARN(1, "omap_hwmod: %s: reset can only be entered from " - "enabled state\n", oh->name); + pr_warning("omap_hwmod: %s: reset can only be entered from " + "enabled state\n", oh->name); return -EINVAL; } + /* For some modules, all optionnal clocks need to be enabled as well */ + if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) + _enable_optional_clocks(oh); + pr_debug("omap_hwmod: %s: resetting\n", oh->name); v = oh->_sysc_cache; - r = _set_softreset(oh, &v); - if (r) - return r; + ret = _set_softreset(oh, &v); + if (ret) + goto dis_opt_clks; _write_sysconfig(v, oh); - omap_test_timeout((omap_hwmod_readl(oh, oh->sysconfig->syss_offs) & - SYSS_RESETDONE_MASK), - MAX_MODULE_RESET_WAIT, c); - - if (c == MAX_MODULE_RESET_WAIT) - WARN(1, "omap_hwmod: %s: failed to reset in %d usec\n", - oh->name, MAX_MODULE_RESET_WAIT); + if (oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS) + omap_test_timeout((omap_hwmod_read(oh, + oh->class->sysc->syss_offs) + & SYSS_RESETDONE_MASK), + MAX_MODULE_SOFTRESET_WAIT, c); + else if (oh->class->sysc->sysc_flags & SYSC_HAS_RESET_STATUS) + omap_test_timeout(!(omap_hwmod_read(oh, + oh->class->sysc->sysc_offs) + & SYSC_TYPE2_SOFTRESET_MASK), + MAX_MODULE_SOFTRESET_WAIT, c); + + if (c == MAX_MODULE_SOFTRESET_WAIT) + pr_warning("omap_hwmod: %s: softreset failed (waited %d usec)\n", + oh->name, MAX_MODULE_SOFTRESET_WAIT); else - pr_debug("omap_hwmod: %s: reset in %d usec\n", oh->name, c); + pr_debug("omap_hwmod: %s: softreset in %d usec\n", oh->name, c); /* * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from * _wait_target_ready() or _reset() */ - return (c == MAX_MODULE_RESET_WAIT) ? -ETIMEDOUT : 0; + ret = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0; + +dis_opt_clks: + if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) + _disable_optional_clocks(oh); + + return ret; } /** - * _enable - enable an omap_hwmod + * _omap_hwmod_enable - enable an omap_hwmod * @oh: struct omap_hwmod * * * Enables an omap_hwmod @oh such that the MPU can access the hwmod's - * register target. Must be called with omap_hwmod_mutex held. - * Returns -EINVAL if the hwmod is in the wrong state or passes along - * the return value of _wait_target_ready(). + * register target. (This function has a full name -- + * _omap_hwmod_enable() rather than simply _enable() -- because it is + * currently required by the pm34xx.c idle loop.) Returns -EINVAL if + * the hwmod is in the wrong state or passes along the return value of + * _wait_target_ready(). */ -static int _enable(struct omap_hwmod *oh) +int _omap_hwmod_enable(struct omap_hwmod *oh) { int r; @@ -842,33 +1188,49 @@ static int _enable(struct omap_hwmod *oh) pr_debug("omap_hwmod: %s: enabling\n", oh->name); + /* + * If an IP contains only one HW reset line, then de-assert it in order + * to allow to enable the clocks. Otherwise the PRCM will return + * Intransition status, and the init will failed. + */ + if ((oh->_state == _HWMOD_STATE_INITIALIZED || + oh->_state == _HWMOD_STATE_DISABLED) && oh->rst_lines_cnt == 1) + _deassert_hardreset(oh, oh->rst_lines[0].name); + /* XXX mux balls */ _add_initiator_dep(oh, mpu_oh); _enable_clocks(oh); - if (oh->sysconfig) { - if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED)) - _update_sysc_cache(oh); - _sysc_enable(oh); - } - r = _wait_target_ready(oh); - if (!r) + if (!r) { oh->_state = _HWMOD_STATE_ENABLED; + /* Access the sysconfig only if the target is ready */ + if (oh->class->sysc) { + if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED)) + _update_sysc_cache(oh); + _enable_sysc(oh); + } + } else { + pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n", + oh->name, r); + } + return r; } /** - * _idle - idle an omap_hwmod + * _omap_hwmod_idle - idle an omap_hwmod * @oh: struct omap_hwmod * * * Idles an omap_hwmod @oh. This should be called once the hwmod has - * no further work. Returns -EINVAL if the hwmod is in the wrong - * state or returns 0. + * no further work. (This function has a full name -- + * _omap_hwmod_idle() rather than simply _idle() -- because it is + * currently required by the pm34xx.c idle loop.) Returns -EINVAL if + * the hwmod is in the wrong state or returns 0. */ -static int _idle(struct omap_hwmod *oh) +int _omap_hwmod_idle(struct omap_hwmod *oh) { if (oh->_state != _HWMOD_STATE_ENABLED) { WARN(1, "omap_hwmod: %s: idle state can only be entered from " @@ -878,8 +1240,8 @@ static int _idle(struct omap_hwmod *oh) pr_debug("omap_hwmod: %s: idling\n", oh->name); - if (oh->sysconfig) - _sysc_idle(oh); + if (oh->class->sysc) + _idle_sysc(oh); _del_initiator_dep(oh, mpu_oh); _disable_clocks(oh); @@ -908,11 +1270,22 @@ static int _shutdown(struct omap_hwmod *oh) pr_debug("omap_hwmod: %s: disabling\n", oh->name); - if (oh->sysconfig) - _sysc_shutdown(oh); - _del_initiator_dep(oh, mpu_oh); - /* XXX what about the other system initiators here? DMA, tesla, d2d */ - _disable_clocks(oh); + if (oh->class->sysc) + _shutdown_sysc(oh); + + /* + * If an IP contains only one HW reset line, then assert it + * before disabling the clocks and shutting down the IP. + */ + if (oh->rst_lines_cnt == 1) + _assert_hardreset(oh, oh->rst_lines[0].name); + + /* clocks and deps are already disabled in idle */ + if (oh->_state == _HWMOD_STATE_ENABLED) { + _del_initiator_dep(oh, mpu_oh); + /* XXX what about the other system initiators here? dma, dsp */ + _disable_clocks(oh); + } /* XXX Should this code also force-disable the optional clocks? */ /* XXX mux any associated balls to safe mode */ @@ -925,26 +1298,31 @@ static int _shutdown(struct omap_hwmod *oh) /** * _setup - do initial configuration of omap_hwmod * @oh: struct omap_hwmod * + * @skip_setup_idle_p: do not idle hwmods at the end of the fn if 1 * * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh - * OCP_SYSCONFIG register. Must be called with omap_hwmod_mutex - * held. Returns -EINVAL if the hwmod is in the wrong state or returns - * 0. + * OCP_SYSCONFIG register. @skip_setup_idle is intended to be used on + * a system that will not call omap_hwmod_enable() to enable devices + * (e.g., a system without PM runtime). Returns -EINVAL if the hwmod + * is in the wrong state or returns 0. */ -static int _setup(struct omap_hwmod *oh) +static int _setup(struct omap_hwmod *oh, void *data) { - struct omap_hwmod_ocp_if *os; - int i; + int i, r; + u8 skip_setup_idle; - if (!oh) + if (!oh || !data) return -EINVAL; + skip_setup_idle = *(u8 *)data; + /* Set iclk autoidle mode */ if (oh->slaves_cnt > 0) { - for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) { + for (i = 0; i < oh->slaves_cnt; i++) { + struct omap_hwmod_ocp_if *os = oh->slaves[i]; struct clk *c = os->_clk; - if (!c || IS_ERR(c)) + if (!c) continue; if (os->flags & OCPIF_SWSUP_IDLE) { @@ -956,26 +1334,42 @@ static int _setup(struct omap_hwmod *oh) } } + mutex_init(&oh->_mutex); oh->_state = _HWMOD_STATE_INITIALIZED; - _enable(oh); + /* + * In the case of hwmod with hardreset that should not be + * de-assert at boot time, we have to keep the module + * initialized, because we cannot enable it properly with the + * reset asserted. Exit without warning because that behavior is + * expected. + */ + if ((oh->flags & HWMOD_INIT_NO_RESET) && oh->rst_lines_cnt == 1) + return 0; + + r = _omap_hwmod_enable(oh); + if (r) { + pr_warning("omap_hwmod: %s: cannot be enabled (%d)\n", + oh->name, oh->_state); + return 0; + } if (!(oh->flags & HWMOD_INIT_NO_RESET)) { + _reset(oh); + /* - * XXX Do the OCP_SYSCONFIG bits need to be - * reprogrammed after a reset? If not, then this can - * be removed. If they do, then probably the - * _enable() function should be split to avoid the - * rewrite of the OCP_SYSCONFIG register. + * OCP_SYSCONFIG bits need to be reprogrammed after a softreset. + * The _omap_hwmod_enable() function should be split to + * avoid the rewrite of the OCP_SYSCONFIG register. */ - if (oh->sysconfig) { + if (oh->class->sysc) { _update_sysc_cache(oh); - _sysc_enable(oh); + _enable_sysc(oh); } } - if (!(oh->flags & HWMOD_INIT_NO_IDLE)) - _idle(oh); + if (!(oh->flags & HWMOD_INIT_NO_IDLE) && !skip_setup_idle) + _omap_hwmod_idle(oh); return 0; } @@ -984,23 +1378,64 @@ static int _setup(struct omap_hwmod *oh) /* Public functions */ -u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs) +u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs) { - return __raw_readl(oh->_rt_va + reg_offs); + if (oh->flags & HWMOD_16BIT_REG) + return __raw_readw(oh->_mpu_rt_va + reg_offs); + else + return __raw_readl(oh->_mpu_rt_va + reg_offs); +} + +void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs) +{ + if (oh->flags & HWMOD_16BIT_REG) + __raw_writew(v, oh->_mpu_rt_va + reg_offs); + else + __raw_writel(v, oh->_mpu_rt_va + reg_offs); } -void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs) +/** + * omap_hwmod_set_slave_idlemode - set the hwmod's OCP slave idlemode + * @oh: struct omap_hwmod * + * @idlemode: SIDLEMODE field bits (shifted to bit 0) + * + * Sets the IP block's OCP slave idlemode in hardware, and updates our + * local copy. Intended to be used by drivers that have some erratum + * that requires direct manipulation of the SIDLEMODE bits. Returns + * -EINVAL if @oh is null, or passes along the return value from + * _set_slave_idlemode(). + * + * XXX Does this function have any current users? If not, we should + * remove it; it is better to let the rest of the hwmod code handle this. + * Any users of this function should be scrutinized carefully. + */ +int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode) { - __raw_writel(v, oh->_rt_va + reg_offs); + u32 v; + int retval = 0; + + if (!oh) + return -EINVAL; + + v = oh->_sysc_cache; + + retval = _set_slave_idlemode(oh, idlemode, &v); + if (!retval) + _write_sysconfig(v, oh); + + return retval; } /** * omap_hwmod_register - register a struct omap_hwmod * @oh: struct omap_hwmod * * - * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod already - * has been registered by the same name; -EINVAL if the omap_hwmod is in the - * wrong state, or 0 on success. + * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod + * already has been registered by the same name; -EINVAL if the + * omap_hwmod is in the wrong state, if @oh is NULL, if the + * omap_hwmod's class field is NULL; if the omap_hwmod is missing a + * name, or if the omap_hwmod's class is missing a name; or 0 upon + * success. * * XXX The data should be copied into bootmem, so the original data * should be marked __initdata and freed after init. This would allow @@ -1012,7 +1447,8 @@ int omap_hwmod_register(struct omap_hwmod *oh) { int ret, ms_id; - if (!oh || (oh->_state != _HWMOD_STATE_UNKNOWN)) + if (!oh || !oh->name || !oh->class || !oh->class->name || + (oh->_state != _HWMOD_STATE_UNKNOWN)) return -EINVAL; mutex_lock(&omap_hwmod_mutex); @@ -1027,7 +1463,7 @@ int omap_hwmod_register(struct omap_hwmod *oh) ms_id = _find_mpu_port_index(oh); if (!IS_ERR_VALUE(ms_id)) { oh->_mpu_port_index = ms_id; - oh->_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); + oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); } else { oh->_int_flags |= _HWMOD_NO_MPU_PORT; } @@ -1067,6 +1503,7 @@ struct omap_hwmod *omap_hwmod_lookup(const char *name) /** * omap_hwmod_for_each - call function for each registered omap_hwmod * @fn: pointer to a callback function + * @data: void * data to pass to callback function * * Call @fn for each registered omap_hwmod, passing @data to each * function. @fn must return 0 for success or any other value for @@ -1075,7 +1512,8 @@ struct omap_hwmod *omap_hwmod_lookup(const char *name) * caller of omap_hwmod_for_each(). @fn is called with * omap_hwmod_for_each() held. */ -int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh)) +int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data), + void *data) { struct omap_hwmod *temp_oh; int ret; @@ -1085,7 +1523,7 @@ int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh)) mutex_lock(&omap_hwmod_mutex); list_for_each_entry(temp_oh, &omap_hwmod_list, node) { - ret = (*fn)(temp_oh); + ret = (*fn)(temp_oh, data); if (ret) break; } @@ -1132,24 +1570,28 @@ int omap_hwmod_init(struct omap_hwmod **ohs) /** * omap_hwmod_late_init - do some post-clock framework initialization + * @skip_setup_idle: if 1, do not idle hwmods in _setup() * * Must be called after omap2_clk_init(). Resolves the struct clk names * to struct clk pointers for each registered omap_hwmod. Also calls * _setup() on each hwmod. Returns 0. */ -int omap_hwmod_late_init(void) +int omap_hwmod_late_init(u8 skip_setup_idle) { int r; /* XXX check return value */ - r = omap_hwmod_for_each(_init_clocks); + r = omap_hwmod_for_each(_init_clocks, NULL); WARN(r, "omap_hwmod: omap_hwmod_late_init(): _init_clocks failed\n"); mpu_oh = omap_hwmod_lookup(MPU_INITIATOR_NAME); WARN(!mpu_oh, "omap_hwmod: could not find MPU initiator hwmod %s\n", MPU_INITIATOR_NAME); - omap_hwmod_for_each(_setup); + if (skip_setup_idle) + pr_debug("omap_hwmod: will leave hwmods enabled during setup\n"); + + omap_hwmod_for_each(_setup, &skip_setup_idle); return 0; } @@ -1173,7 +1615,7 @@ int omap_hwmod_unregister(struct omap_hwmod *oh) pr_debug("omap_hwmod: %s: unregistering\n", oh->name); mutex_lock(&omap_hwmod_mutex); - iounmap(oh->_rt_va); + iounmap(oh->_mpu_rt_va); list_del(&oh->node); mutex_unlock(&omap_hwmod_mutex); @@ -1184,7 +1626,7 @@ int omap_hwmod_unregister(struct omap_hwmod *oh) * omap_hwmod_enable - enable an omap_hwmod * @oh: struct omap_hwmod * * - * Enable an omap_hwomd @oh. Intended to be called by omap_device_enable(). + * Enable an omap_hwmod @oh. Intended to be called by omap_device_enable(). * Returns -EINVAL on error or passes along the return value from _enable(). */ int omap_hwmod_enable(struct omap_hwmod *oh) @@ -1194,18 +1636,19 @@ int omap_hwmod_enable(struct omap_hwmod *oh) if (!oh) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); - r = _enable(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); + r = _omap_hwmod_enable(oh); + mutex_unlock(&oh->_mutex); return r; } + /** * omap_hwmod_idle - idle an omap_hwmod * @oh: struct omap_hwmod * * - * Idle an omap_hwomd @oh. Intended to be called by omap_device_idle(). + * Idle an omap_hwmod @oh. Intended to be called by omap_device_idle(). * Returns -EINVAL on error or passes along the return value from _idle(). */ int omap_hwmod_idle(struct omap_hwmod *oh) @@ -1213,9 +1656,9 @@ int omap_hwmod_idle(struct omap_hwmod *oh) if (!oh) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); - _idle(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); + _omap_hwmod_idle(oh); + mutex_unlock(&oh->_mutex); return 0; } @@ -1224,7 +1667,7 @@ int omap_hwmod_idle(struct omap_hwmod *oh) * omap_hwmod_shutdown - shutdown an omap_hwmod * @oh: struct omap_hwmod * * - * Shutdown an omap_hwomd @oh. Intended to be called by + * Shutdown an omap_hwmod @oh. Intended to be called by * omap_device_shutdown(). Returns -EINVAL on error or passes along * the return value from _shutdown(). */ @@ -1233,9 +1676,9 @@ int omap_hwmod_shutdown(struct omap_hwmod *oh) if (!oh) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); _shutdown(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_unlock(&oh->_mutex); return 0; } @@ -1248,9 +1691,9 @@ int omap_hwmod_shutdown(struct omap_hwmod *oh) */ int omap_hwmod_enable_clocks(struct omap_hwmod *oh) { - mutex_lock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); _enable_clocks(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_unlock(&oh->_mutex); return 0; } @@ -1263,9 +1706,9 @@ int omap_hwmod_enable_clocks(struct omap_hwmod *oh) */ int omap_hwmod_disable_clocks(struct omap_hwmod *oh) { - mutex_lock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); _disable_clocks(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_unlock(&oh->_mutex); return 0; } @@ -1285,7 +1728,7 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) { BUG_ON(!oh); - if (!oh->sysconfig || !oh->sysconfig->sysc_flags) { + if (!oh->class->sysc || !oh->class->sysc->sysc_flags) { WARN(1, "omap_device: %s: OCP barrier impossible due to " "device configuration\n", oh->name); return; @@ -1295,7 +1738,7 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) * Forces posted writes to complete on the OCP thread handling * register writes */ - omap_hwmod_readl(oh, oh->sysconfig->sysc_offs); + omap_hwmod_read(oh, oh->class->sysc->sysc_offs); } /** @@ -1304,20 +1747,18 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) * * Under some conditions, a driver may wish to reset the entire device. * Called from omap_device code. Returns -EINVAL on error or passes along - * the return value from _reset()/_enable(). + * the return value from _reset(). */ int omap_hwmod_reset(struct omap_hwmod *oh) { int r; - if (!oh || !(oh->_state & _HWMOD_STATE_ENABLED)) + if (!oh) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); r = _reset(oh); - if (!r) - r = _enable(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_unlock(&oh->_mutex); return r; } @@ -1342,10 +1783,10 @@ int omap_hwmod_count_resources(struct omap_hwmod *oh) { int ret, i; - ret = oh->mpu_irqs_cnt + oh->sdma_chs_cnt; + ret = oh->mpu_irqs_cnt + oh->sdma_reqs_cnt; for (i = 0; i < oh->slaves_cnt; i++) - ret += (*oh->slaves + i)->addr_cnt; + ret += oh->slaves[i]->addr_cnt; return ret; } @@ -1375,10 +1816,10 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) r++; } - for (i = 0; i < oh->sdma_chs_cnt; i++) { - (res + r)->name = (oh->sdma_chs + i)->name; - (res + r)->start = (oh->sdma_chs + i)->dma_ch; - (res + r)->end = (oh->sdma_chs + i)->dma_ch; + for (i = 0; i < oh->sdma_reqs_cnt; i++) { + (res + r)->name = (oh->sdma_reqs + i)->name; + (res + r)->start = (oh->sdma_reqs + i)->dma_req; + (res + r)->end = (oh->sdma_reqs + i)->dma_req; (res + r)->flags = IORESOURCE_DMA; r++; } @@ -1386,7 +1827,7 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) for (i = 0; i < oh->slaves_cnt; i++) { struct omap_hwmod_ocp_if *os; - os = *oh->slaves + i; + os = oh->slaves[i]; for (j = 0; j < os->addr_cnt; j++) { (res + r)->start = (os->addr + j)->pa_start; @@ -1425,11 +1866,37 @@ struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh) c = oh->slaves[oh->_mpu_port_index]->_clk; } + if (!c->clkdm) + return NULL; + return c->clkdm->pwrdm.ptr; } /** + * omap_hwmod_get_mpu_rt_va - return the module's base address (for the MPU) + * @oh: struct omap_hwmod * + * + * Returns the virtual address corresponding to the beginning of the + * module's register target, in the address range that is intended to + * be used by the MPU. Returns the virtual address upon success or NULL + * upon error. + */ +void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh) +{ + if (!oh) + return NULL; + + if (oh->_int_flags & _HWMOD_NO_MPU_PORT) + return NULL; + + if (oh->_state == _HWMOD_STATE_UNKNOWN) + return NULL; + + return oh->_mpu_rt_va; +} + +/** * omap_hwmod_add_initiator_dep - add sleepdep from @init_oh to @oh * @oh: struct omap_hwmod * * @init_oh: struct omap_hwmod * (initiator) @@ -1488,13 +1955,13 @@ int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh, */ int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) { - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP)) + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); _enable_wakeup(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_unlock(&oh->_mutex); return 0; } @@ -1513,13 +1980,140 @@ int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) */ int omap_hwmod_disable_wakeup(struct omap_hwmod *oh) { - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP)) + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); + mutex_lock(&oh->_mutex); _disable_wakeup(oh); - mutex_unlock(&omap_hwmod_mutex); + mutex_unlock(&oh->_mutex); return 0; } + +/** + * omap_hwmod_assert_hardreset - assert the HW reset line of submodules + * contained in the hwmod module. + * @oh: struct omap_hwmod * + * @name: name of the reset line to lookup and assert + * + * Some IP like dsp, ipu or iva contain processor that require + * an HW reset line to be assert / deassert in order to enable fully + * the IP. Returns -EINVAL if @oh is null or if the operation is not + * yet supported on this OMAP; otherwise, passes along the return value + * from _assert_hardreset(). + */ +int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name) +{ + int ret; + + if (!oh) + return -EINVAL; + + mutex_lock(&oh->_mutex); + ret = _assert_hardreset(oh, name); + mutex_unlock(&oh->_mutex); + + return ret; +} + +/** + * omap_hwmod_deassert_hardreset - deassert the HW reset line of submodules + * contained in the hwmod module. + * @oh: struct omap_hwmod * + * @name: name of the reset line to look up and deassert + * + * Some IP like dsp, ipu or iva contain processor that require + * an HW reset line to be assert / deassert in order to enable fully + * the IP. Returns -EINVAL if @oh is null or if the operation is not + * yet supported on this OMAP; otherwise, passes along the return value + * from _deassert_hardreset(). + */ +int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name) +{ + int ret; + + if (!oh) + return -EINVAL; + + mutex_lock(&oh->_mutex); + ret = _deassert_hardreset(oh, name); + mutex_unlock(&oh->_mutex); + + return ret; +} + +/** + * omap_hwmod_read_hardreset - read the HW reset line state of submodules + * contained in the hwmod module + * @oh: struct omap_hwmod * + * @name: name of the reset line to look up and read + * + * Return the current state of the hwmod @oh's reset line named @name: + * returns -EINVAL upon parameter error or if this operation + * is unsupported on the current OMAP; otherwise, passes along the return + * value from _read_hardreset(). + */ +int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name) +{ + int ret; + + if (!oh) + return -EINVAL; + + mutex_lock(&oh->_mutex); + ret = _read_hardreset(oh, name); + mutex_unlock(&oh->_mutex); + + return ret; +} + + +/** + * omap_hwmod_for_each_by_class - call @fn for each hwmod of class @classname + * @classname: struct omap_hwmod_class name to search for + * @fn: callback function pointer to call for each hwmod in class @classname + * @user: arbitrary context data to pass to the callback function + * + * For each omap_hwmod of class @classname, call @fn. Takes + * omap_hwmod_mutex to prevent the hwmod list from changing during the + * iteration. If the callback function returns something other than + * zero, the iterator is terminated, and the callback function's return + * value is passed back to the caller. Returns 0 upon success, -EINVAL + * if @classname or @fn are NULL, or passes back the error code from @fn. + */ +int omap_hwmod_for_each_by_class(const char *classname, + int (*fn)(struct omap_hwmod *oh, + void *user), + void *user) +{ + struct omap_hwmod *temp_oh; + int ret = 0; + + if (!classname || !fn) + return -EINVAL; + + pr_debug("omap_hwmod: %s: looking for modules of class %s\n", + __func__, classname); + + mutex_lock(&omap_hwmod_mutex); + + list_for_each_entry(temp_oh, &omap_hwmod_list, node) { + if (!strcmp(temp_oh->class->name, classname)) { + pr_debug("omap_hwmod: %s: %s: calling callback fn\n", + __func__, temp_oh->name); + ret = (*fn)(temp_oh, user); + if (ret) + break; + } + } + + mutex_unlock(&omap_hwmod_mutex); + + if (ret) + pr_debug("omap_hwmod: %s: iterator terminated early: %d\n", + __func__, ret); + + return ret; +} + |