/* * arch/arm/plat-omap/include/mach/dmtimer.h * * OMAP Dual-Mode Timers * * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ * Tarun Kanti DebBarma * Thara Gopinath * * Platform device conversion and hwmod support. * * Copyright (C) 2005 Nokia Corporation * Author: Lauri Leukkunen * PWM and clock framwork support by Timo Teras. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #ifndef __ASM_ARCH_DMTIMER_H #define __ASM_ARCH_DMTIMER_H /* clock sources */ #define OMAP_TIMER_SRC_SYS_CLK 0x00 #define OMAP_TIMER_SRC_32_KHZ 0x01 #define OMAP_TIMER_SRC_EXT_CLK 0x02 /* timer interrupt enable bits */ #define OMAP_TIMER_INT_CAPTURE (1 << 2) #define OMAP_TIMER_INT_OVERFLOW (1 << 1) #define OMAP_TIMER_INT_MATCH (1 << 0) /* trigger types */ #define OMAP_TIMER_TRIGGER_NONE 0x00 #define OMAP_TIMER_TRIGGER_OVERFLOW 0x01 #define OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE 0x02 /* * IP revision identifier so that Highlander IP * in OMAP4 can be distinguished. */ #define OMAP_TIMER_IP_VERSION_1 0x1 struct omap_dm_timer; extern struct omap_dm_timer *gptimer_wakeup; struct clk; int omap_dm_timer_init(void); struct omap_dm_timer *omap_dm_timer_request(void); struct omap_dm_timer *omap_dm_timer_request_specific(int timer_id); void omap_dm_timer_free(struct omap_dm_timer *timer); void omap_dm_timer_enable(struct omap_dm_timer *timer); void omap_dm_timer_disable(struct omap_dm_timer *timer); int omap_dm_timer_get_irq(struct omap_dm_timer *timer); u32 omap_dm_timer_modify_idlect_mask(u32 inputmask); struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer); void omap_dm_timer_trigger(struct omap_dm_timer *timer); void omap_dm_timer_start(struct omap_dm_timer *timer); void omap_dm_timer_stop(struct omap_dm_timer *timer); int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source); void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int value); void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int value); void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match); void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, int toggle, int trigger); void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler); void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value); unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer); void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value); unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer); void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value); int omap_dm_timers_active(void); /* * Do not use the defines below, they are not needed. They should be only * used by dmtimer.c and sys_timer related code. */ /* register offsets */ #define _OMAP_TIMER_ID_OFFSET 0x00 #define _OMAP_TIMER_OCP_CFG_OFFSET 0x10 #define _OMAP_TIMER_SYS_STAT_OFFSET 0x14 #define _OMAP_TIMER_STAT_OFFSET 0x18 #define _OMAP_TIMER_INT_EN_OFFSET 0x1c #define _OMAP_TIMER_WAKEUP_EN_OFFSET 0x20 #define _OMAP_TIMER_CTRL_OFFSET 0x24 #define OMAP_TIMER_CTRL_GPOCFG (1 << 14) #define OMAP_TIMER_CTRL_CAPTMODE (1 << 13) #define OMAP_TIMER_CTRL_PT (1 << 12) #define OMAP_TIMER_CTRL_TCM_LOWTOHIGH (0x1 << 8) #define OMAP_TIMER_CTRL_TCM_HIGHTOLOW (0x2 << 8) #define OMAP_TIMER_CTRL_TCM_BOTHEDGES (0x3 << 8) #define OMAP_TIMER_CTRL_SCPWM (1 << 7) #define OMAP_TIMER_CTRL_CE (1 << 6) /* compare enable */ #define OMAP_TIMER_CTRL_PRE (1 << 5) /* prescaler enable */ #define OMAP_TIMER_CTRL_PTV_SHIFT 2 /* prescaler value shift */ #define OMAP_TIMER_CTRL_POSTED (1 << 2) #define OMAP_TIMER_CTRL_AR (1 << 1) /* auto-reload enable */ #define OMAP_TIMER_CTRL_ST (1 << 0) /* start timer */ #define _OMAP_TIMER_COUNTER_OFFSET 0x28 #define _OMAP_TIMER_LOAD_OFFSET 0x2c #define _OMAP_TIMER_TRIGGER_OFFSET 0x30 #define _OMAP_TIMER_WRITE_PEND_OFFSET 0x34 #define WP_NONE 0 /* no write pending bit */ #define WP_TCLR (1 << 0) #define WP_TCRR (1 << 1) #define WP_TLDR (1 << 2) #define WP_TTGR (1 << 3) #define WP_TMAR (1 << 4) #define WP_TPIR (1 << 5) #define WP_TNIR (1 << 6) #define WP_TCVR (1 << 7) #define WP_TOCR (1 << 8) #define WP_TOWR (1 << 9) #define _OMAP_TIMER_MATCH_OFFSET 0x38 #define _OMAP_TIMER_CAPTURE_OFFSET 0x3c #define _OMAP_TIMER_IF_CTRL_OFFSET 0x40 #define _OMAP_TIMER_CAPTURE2_OFFSET 0x44 /* TCAR2, 34xx only */ #define _OMAP_TIMER_TICK_POS_OFFSET 0x48 /* TPIR, 34xx only */ #define _OMAP_TIMER_TICK_NEG_OFFSET 0x4c /* TNIR, 34xx only */ #define _OMAP_TIMER_TICK_COUNT_OFFSET 0x50 /* TCVR, 34xx only */ #define _OMAP_TIMER_TICK_INT_MASK_SET_OFFSET 0x54 /* TOCR, 34xx only */ #define _OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET 0x58 /* TOWR, 34xx only */ /* register offsets with the write pending bit encoded */ #define WPSHIFT 16 #define OMAP_TIMER_ID_REG (_OMAP_TIMER_ID_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_OCP_CFG_REG (_OMAP_TIMER_OCP_CFG_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_SYS_STAT_REG (_OMAP_TIMER_SYS_STAT_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_STAT_REG (_OMAP_TIMER_STAT_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_INT_EN_REG (_OMAP_TIMER_INT_EN_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_WAKEUP_EN_REG (_OMAP_TIMER_WAKEUP_EN_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_CTRL_REG (_OMAP_TIMER_CTRL_OFFSET \ | (WP_TCLR << WPSHIFT)) #define OMAP_TIMER_COUNTER_REG (_OMAP_TIMER_COUNTER_OFFSET \ | (WP_TCRR << WPSHIFT)) #define OMAP_TIMER_LOAD_REG (_OMAP_TIMER_LOAD_OFFSET \ | (WP_TLDR << WPSHIFT)) #define OMAP_TIMER_TRIGGER_REG (_OMAP_TIMER_TRIGGER_OFFSET \ | (WP_TTGR << WPSHIFT)) #define OMAP_TIMER_WRITE_PEND_REG (_OMAP_TIMER_WRITE_PEND_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_MATCH_REG (_OMAP_TIMER_MATCH_OFFSET \ | (WP_TMAR << WPSHIFT)) #define OMAP_TIMER_CAPTURE_REG (_OMAP_TIMER_CAPTURE_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_IF_CTRL_REG (_OMAP_TIMER_IF_CTRL_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_CAPTURE2_REG (_OMAP_TIMER_CAPTURE2_OFFSET \ | (WP_NONE << WPSHIFT)) #define OMAP_TIMER_TICK_POS_REG (_OMAP_TIMER_TICK_POS_OFFSET \ | (WP_TPIR << WPSHIFT)) #define OMAP_TIMER_TICK_NEG_REG (_OMAP_TIMER_TICK_NEG_OFFSET \ | (WP_TNIR << WPSHIFT)) #define OMAP_TIMER_TICK_COUNT_REG (_OMAP_TIMER_TICK_COUNT_OFFSET \ | (WP_TCVR << WPSHIFT)) #define OMAP_TIMER_TICK_INT_MASK_SET_REG \ (_OMAP_TIMER_TICK_INT_MASK_SET_OFFSET | (WP_TOCR << WPSHIFT)) #define OMAP_TIMER_TICK_INT_MASK_COUNT_REG \ (_OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET | (WP_TOWR << WPSHIFT)) struct omap_dm_timer { unsigned long phys_base; int irq; #ifdef CONFIG_ARCH_OMAP2PLUS struct clk *iclk, *fclk; #endif void __iomem *io_base; unsigned long rate; unsigned reserved:1; unsigned enabled:1; unsigned posted:1; }; void omap_dm_timer_prepare(struct omap_dm_timer *timer); static inline u32 __omap_dm_timer_read(void __iomem *base, u32 reg, int posted) { if (posted) while (__raw_readl(base + (OMAP_TIMER_WRITE_PEND_REG & 0xff)) & (reg >> WPSHIFT)) cpu_relax(); return __raw_readl(base + (reg & 0xff)); } static inline void __omap_dm_timer_write(void __iomem *base, u32 reg, u32 val, int posted) { if (posted) while (__raw_readl(base + (OMAP_TIMER_WRITE_PEND_REG & 0xff)) & (reg >> WPSHIFT)) cpu_relax(); __raw_writel(val, base + (reg & 0xff)); } /* Assumes the source clock has been set by caller */ static inline void __omap_dm_timer_reset(void __iomem *base, int autoidle, int wakeup) { u32 l; l = __omap_dm_timer_read(base, OMAP_TIMER_OCP_CFG_REG, 0); l |= 0x02 << 3; /* Set to smart-idle mode */ l |= 0x2 << 8; /* Set clock activity to perserve f-clock on idle */ if (autoidle) l |= 0x1 << 0; if (wakeup) l |= 1 << 2; __omap_dm_timer_write(base, OMAP_TIMER_OCP_CFG_REG, l, 0); /* Match hardware reset default of posted mode */ __omap_dm_timer_write(base, OMAP_TIMER_IF_CTRL_REG, OMAP_TIMER_CTRL_POSTED, 0); } static inline int __omap_dm_timer_set_source(struct clk *timer_fck, struct clk *parent) { int ret; clk_disable(timer_fck); ret = clk_set_parent(timer_fck, parent); clk_enable(timer_fck); /* * When the functional clock disappears, too quick writes seem * to cause an abort. XXX Is this still necessary? */ __delay(300000); return ret; } static inline void __omap_dm_timer_stop(void __iomem *base, int posted, unsigned long rate) { u32 l; l = __omap_dm_timer_read(base, OMAP_TIMER_CTRL_REG, posted); if (l & OMAP_TIMER_CTRL_ST) { l &= ~0x1; __omap_dm_timer_write(base, OMAP_TIMER_CTRL_REG, l, posted); #ifdef CONFIG_ARCH_OMAP2PLUS /* Readback to make sure write has completed */ __omap_dm_timer_read(base, OMAP_TIMER_CTRL_REG, posted); /* * Wait for functional clock period x 3.5 to make sure that * timer is stopped */ udelay(3500000 / rate + 1); #endif } /* Ack possibly pending interrupt */ __omap_dm_timer_write(base, OMAP_TIMER_STAT_REG, OMAP_TIMER_INT_OVERFLOW, 0); } static inline void __omap_dm_timer_load_start(void __iomem *base, u32 ctrl, unsigned int load, int posted) { __omap_dm_timer_write(base, OMAP_TIMER_COUNTER_REG, load, posted); __omap_dm_timer_write(base, OMAP_TIMER_CTRL_REG, ctrl, posted); } static inline void __omap_dm_timer_int_enable(void __iomem *base, unsigned int value) { __omap_dm_timer_write(base, OMAP_TIMER_INT_EN_REG, value, 0); __omap_dm_timer_write(base, OMAP_TIMER_WAKEUP_EN_REG, value, 0); } static inline unsigned int __omap_dm_timer_read_counter(void __iomem *base, int posted) { return __omap_dm_timer_read(base, OMAP_TIMER_COUNTER_REG, posted); } static inline void __omap_dm_timer_write_status(void __iomem *base, unsigned int value) { __omap_dm_timer_write(base, OMAP_TIMER_STAT_REG, value, 0); } #endif /* __ASM_ARCH_DMTIMER_H */