diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 164 |
1 files changed, 64 insertions, 100 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 633b216a8b26..d8c8545875b1 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -45,6 +45,7 @@ #include <linux/mutex.h> #include <linux/bootmem.h> +#include <plat/common.h> #include <plat/cpu.h> #include <plat/clockdomain.h> #include <plat/powerdomain.h> @@ -210,6 +211,32 @@ static int _set_softreset(struct omap_hwmod *oh, u32 *v) } /** + * _set_module_autoidle: set the OCP_SYSCONFIG AUTOIDLE field in @v + * @oh: struct omap_hwmod * + * @autoidle: desired AUTOIDLE bitfield value (0 or 1) + * @v: pointer to register contents to modify + * + * Update the module autoidle bit in @v to be @autoidle for the @oh + * hwmod. The autoidle bit controls whether the module can gate + * internal clocks automatically when it isn't doing anything; the + * exact function of this bit varies on a per-module basis. This + * function does not write to the hardware. Returns -EINVAL upon + * error or 0 upon success. + */ +static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, + u32 *v) +{ + if (!oh->sysconfig || + !(oh->sysconfig->sysc_flags & SYSC_HAS_AUTOIDLE)) + return -EINVAL; + + *v &= ~SYSC_AUTOIDLE_MASK; + *v |= autoidle << SYSC_AUTOIDLE_SHIFT; + + return 0; +} + +/** * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware * @oh: struct omap_hwmod * * @@ -326,6 +353,9 @@ static int _init_main_clk(struct omap_hwmod *oh) ret = -EINVAL; oh->_clk = c; + WARN(!c->clkdm, "omap_hwmod: %s: missing clockdomain for %s.\n", + oh->clkdev_con_id, c->name); + return ret; } @@ -557,8 +587,19 @@ static void _sysc_enable(struct omap_hwmod *oh) _set_master_standbymode(oh, idlemode, &v); } - /* XXX OCP AUTOIDLE bit? */ + 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); @@ -622,7 +663,8 @@ static void _sysc_shutdown(struct omap_hwmod *oh) if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) _set_master_standbymode(oh, HWMOD_IDLEMODE_FORCE, &v); - /* XXX clear OCP AUTOIDLE bit? */ + if (oh->sysconfig->sysc_flags & SYSC_HAS_AUTOIDLE) + _set_module_autoidle(oh, 1, &v); _write_sysconfig(v, oh); } @@ -736,7 +778,7 @@ static int _wait_target_ready(struct omap_hwmod *oh) static int _reset(struct omap_hwmod *oh) { u32 r, v; - int c; + int c = 0; if (!oh->sysconfig || !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET) || @@ -758,13 +800,9 @@ static int _reset(struct omap_hwmod *oh) return r; _write_sysconfig(v, oh); - c = 0; - while (c < MAX_MODULE_RESET_WAIT && - !(omap_hwmod_readl(oh, oh->sysconfig->syss_offs) & - SYSS_RESETDONE_MASK)) { - udelay(1); - c++; - } + 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", @@ -884,33 +922,6 @@ static int _shutdown(struct omap_hwmod *oh) } /** - * _write_clockact_lock - set the module's clockactivity bits - * @oh: struct omap_hwmod * - * @clockact: CLOCKACTIVITY field bits - * - * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh - * OCP_SYSCONFIG register. Returns -EINVAL if the hwmod is in the - * wrong state or returns 0. - */ -static int _write_clockact_lock(struct omap_hwmod *oh, u8 clockact) -{ - u32 v; - - if (!oh->sysconfig || - !(oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY)) - return -EINVAL; - - mutex_lock(&omap_hwmod_mutex); - v = oh->_sysc_cache; - _set_clockactivity(oh, clockact, &v); - _write_sysconfig(v, oh); - mutex_unlock(&omap_hwmod_mutex); - - return 0; -} - - -/** * _setup - do initial configuration of omap_hwmod * @oh: struct omap_hwmod * * @@ -948,11 +959,19 @@ static int _setup(struct omap_hwmod *oh) _enable(oh); - if (!(oh->flags & HWMOD_INIT_NO_RESET)) - _reset(oh); - - /* XXX OCP AUTOIDLE bit? */ - /* XXX OCP ENAWAKEUP bit? */ + if (!(oh->flags & HWMOD_INIT_NO_RESET)) { + /* + * 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. + */ + if (oh->sysconfig) { + _update_sysc_cache(oh); + _sysc_enable(oh); + } + } if (!(oh->flags & HWMOD_INIT_NO_IDLE)) _idle(oh); @@ -1348,8 +1367,9 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) /* For each IRQ, DMA, memory area, fill in array.*/ for (i = 0; i < oh->mpu_irqs_cnt; i++) { - (res + r)->start = *(oh->mpu_irqs + i); - (res + r)->end = *(oh->mpu_irqs + i); + (res + r)->name = (oh->mpu_irqs + i)->name; + (res + r)->start = (oh->mpu_irqs + i)->irq; + (res + r)->end = (oh->mpu_irqs + i)->irq; (res + r)->flags = IORESOURCE_IRQ; r++; } @@ -1454,62 +1474,6 @@ int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh, } /** - * omap_hwmod_set_clockact_none - set clockactivity test to BOTH - * @oh: struct omap_hwmod * - * - * On some modules, this function can affect the wakeup latency vs. - * power consumption balance. Intended to be called by the - * omap_device layer. Passes along the return value from - * _write_clockact_lock(). - */ -int omap_hwmod_set_clockact_both(struct omap_hwmod *oh) -{ - return _write_clockact_lock(oh, CLOCKACT_TEST_BOTH); -} - -/** - * omap_hwmod_set_clockact_none - set clockactivity test to MAIN - * @oh: struct omap_hwmod * - * - * On some modules, this function can affect the wakeup latency vs. - * power consumption balance. Intended to be called by the - * omap_device layer. Passes along the return value from - * _write_clockact_lock(). - */ -int omap_hwmod_set_clockact_main(struct omap_hwmod *oh) -{ - return _write_clockact_lock(oh, CLOCKACT_TEST_MAIN); -} - -/** - * omap_hwmod_set_clockact_none - set clockactivity test to ICLK - * @oh: struct omap_hwmod * - * - * On some modules, this function can affect the wakeup latency vs. - * power consumption balance. Intended to be called by the - * omap_device layer. Passes along the return value from - * _write_clockact_lock(). - */ -int omap_hwmod_set_clockact_iclk(struct omap_hwmod *oh) -{ - return _write_clockact_lock(oh, CLOCKACT_TEST_ICLK); -} - -/** - * omap_hwmod_set_clockact_none - set clockactivity test to NONE - * @oh: struct omap_hwmod * - * - * On some modules, this function can affect the wakeup latency vs. - * power consumption balance. Intended to be called by the - * omap_device layer. Passes along the return value from - * _write_clockact_lock(). - */ -int omap_hwmod_set_clockact_none(struct omap_hwmod *oh) -{ - return _write_clockact_lock(oh, CLOCKACT_TEST_NONE); -} - -/** * omap_hwmod_enable_wakeup - allow device to wake up the system * @oh: struct omap_hwmod * * |