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Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/sysdev/fsl_gtm.c')
-rw-r--r--ANDROID_3.4.5/arch/powerpc/sysdev/fsl_gtm.c437
1 files changed, 0 insertions, 437 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/sysdev/fsl_gtm.c b/ANDROID_3.4.5/arch/powerpc/sysdev/fsl_gtm.c
deleted file mode 100644
index 02cf1e7e..00000000
--- a/ANDROID_3.4.5/arch/powerpc/sysdev/fsl_gtm.c
+++ /dev/null
@@ -1,437 +0,0 @@
-/*
- * Freescale General-purpose Timers Module
- *
- * Copyright (c) Freescale Semicondutor, Inc. 2006.
- * Shlomi Gridish <gridish@freescale.com>
- * Jerry Huang <Chang-Ming.Huang@freescale.com>
- * Copyright (c) MontaVista Software, Inc. 2008.
- * Anton Vorontsov <avorontsov@ru.mvista.com>
- *
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/list.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/spinlock.h>
-#include <linux/bitops.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include <asm/fsl_gtm.h>
-
-#define GTCFR_STP(x) ((x) & 1 ? 1 << 5 : 1 << 1)
-#define GTCFR_RST(x) ((x) & 1 ? 1 << 4 : 1 << 0)
-
-#define GTMDR_ICLK_MASK (3 << 1)
-#define GTMDR_ICLK_ICAS (0 << 1)
-#define GTMDR_ICLK_ICLK (1 << 1)
-#define GTMDR_ICLK_SLGO (2 << 1)
-#define GTMDR_FRR (1 << 3)
-#define GTMDR_ORI (1 << 4)
-#define GTMDR_SPS(x) ((x) << 8)
-
-struct gtm_timers_regs {
- u8 gtcfr1; /* Timer 1, Timer 2 global config register */
- u8 res0[0x3];
- u8 gtcfr2; /* Timer 3, timer 4 global config register */
- u8 res1[0xB];
- __be16 gtmdr1; /* Timer 1 mode register */
- __be16 gtmdr2; /* Timer 2 mode register */
- __be16 gtrfr1; /* Timer 1 reference register */
- __be16 gtrfr2; /* Timer 2 reference register */
- __be16 gtcpr1; /* Timer 1 capture register */
- __be16 gtcpr2; /* Timer 2 capture register */
- __be16 gtcnr1; /* Timer 1 counter */
- __be16 gtcnr2; /* Timer 2 counter */
- __be16 gtmdr3; /* Timer 3 mode register */
- __be16 gtmdr4; /* Timer 4 mode register */
- __be16 gtrfr3; /* Timer 3 reference register */
- __be16 gtrfr4; /* Timer 4 reference register */
- __be16 gtcpr3; /* Timer 3 capture register */
- __be16 gtcpr4; /* Timer 4 capture register */
- __be16 gtcnr3; /* Timer 3 counter */
- __be16 gtcnr4; /* Timer 4 counter */
- __be16 gtevr1; /* Timer 1 event register */
- __be16 gtevr2; /* Timer 2 event register */
- __be16 gtevr3; /* Timer 3 event register */
- __be16 gtevr4; /* Timer 4 event register */
- __be16 gtpsr1; /* Timer 1 prescale register */
- __be16 gtpsr2; /* Timer 2 prescale register */
- __be16 gtpsr3; /* Timer 3 prescale register */
- __be16 gtpsr4; /* Timer 4 prescale register */
- u8 res2[0x40];
-} __attribute__ ((packed));
-
-struct gtm {
- unsigned int clock;
- struct gtm_timers_regs __iomem *regs;
- struct gtm_timer timers[4];
- spinlock_t lock;
- struct list_head list_node;
-};
-
-static LIST_HEAD(gtms);
-
-/**
- * gtm_get_timer - request GTM timer to use it with the rest of GTM API
- * Context: non-IRQ
- *
- * This function reserves GTM timer for later use. It returns gtm_timer
- * structure to use with the rest of GTM API, you should use timer->irq
- * to manage timer interrupt.
- */
-struct gtm_timer *gtm_get_timer16(void)
-{
- struct gtm *gtm = NULL;
- int i;
-
- list_for_each_entry(gtm, &gtms, list_node) {
- spin_lock_irq(&gtm->lock);
-
- for (i = 0; i < ARRAY_SIZE(gtm->timers); i++) {
- if (!gtm->timers[i].requested) {
- gtm->timers[i].requested = true;
- spin_unlock_irq(&gtm->lock);
- return &gtm->timers[i];
- }
- }
-
- spin_unlock_irq(&gtm->lock);
- }
-
- if (gtm)
- return ERR_PTR(-EBUSY);
- return ERR_PTR(-ENODEV);
-}
-EXPORT_SYMBOL(gtm_get_timer16);
-
-/**
- * gtm_get_specific_timer - request specific GTM timer
- * @gtm: specific GTM, pass here GTM's device_node->data
- * @timer: specific timer number, Timer1 is 0.
- * Context: non-IRQ
- *
- * This function reserves GTM timer for later use. It returns gtm_timer
- * structure to use with the rest of GTM API, you should use timer->irq
- * to manage timer interrupt.
- */
-struct gtm_timer *gtm_get_specific_timer16(struct gtm *gtm,
- unsigned int timer)
-{
- struct gtm_timer *ret = ERR_PTR(-EBUSY);
-
- if (timer > 3)
- return ERR_PTR(-EINVAL);
-
- spin_lock_irq(&gtm->lock);
-
- if (gtm->timers[timer].requested)
- goto out;
-
- ret = &gtm->timers[timer];
- ret->requested = true;
-
-out:
- spin_unlock_irq(&gtm->lock);
- return ret;
-}
-EXPORT_SYMBOL(gtm_get_specific_timer16);
-
-/**
- * gtm_put_timer16 - release 16 bits GTM timer
- * @tmr: pointer to the gtm_timer structure obtained from gtm_get_timer
- * Context: any
- *
- * This function releases GTM timer so others may request it.
- */
-void gtm_put_timer16(struct gtm_timer *tmr)
-{
- gtm_stop_timer16(tmr);
-
- spin_lock_irq(&tmr->gtm->lock);
- tmr->requested = false;
- spin_unlock_irq(&tmr->gtm->lock);
-}
-EXPORT_SYMBOL(gtm_put_timer16);
-
-/*
- * This is back-end for the exported functions, it's used to reset single
- * timer in reference mode.
- */
-static int gtm_set_ref_timer16(struct gtm_timer *tmr, int frequency,
- int reference_value, bool free_run)
-{
- struct gtm *gtm = tmr->gtm;
- int num = tmr - &gtm->timers[0];
- unsigned int prescaler;
- u8 iclk = GTMDR_ICLK_ICLK;
- u8 psr;
- u8 sps;
- unsigned long flags;
- int max_prescaler = 256 * 256 * 16;
-
- /* CPM2 doesn't have primary prescaler */
- if (!tmr->gtpsr)
- max_prescaler /= 256;
-
- prescaler = gtm->clock / frequency;
- /*
- * We have two 8 bit prescalers -- primary and secondary (psr, sps),
- * plus "slow go" mode (clk / 16). So, total prescale value is
- * 16 * (psr + 1) * (sps + 1). Though, for CPM2 GTMs we losing psr.
- */
- if (prescaler > max_prescaler)
- return -EINVAL;
-
- if (prescaler > max_prescaler / 16) {
- iclk = GTMDR_ICLK_SLGO;
- prescaler /= 16;
- }
-
- if (prescaler <= 256) {
- psr = 0;
- sps = prescaler - 1;
- } else {
- psr = 256 - 1;
- sps = prescaler / 256 - 1;
- }
-
- spin_lock_irqsave(&gtm->lock, flags);
-
- /*
- * Properly reset timers: stop, reset, set up prescalers, reference
- * value and clear event register.
- */
- clrsetbits_8(tmr->gtcfr, ~(GTCFR_STP(num) | GTCFR_RST(num)),
- GTCFR_STP(num) | GTCFR_RST(num));
-
- setbits8(tmr->gtcfr, GTCFR_STP(num));
-
- if (tmr->gtpsr)
- out_be16(tmr->gtpsr, psr);
- clrsetbits_be16(tmr->gtmdr, 0xFFFF, iclk | GTMDR_SPS(sps) |
- GTMDR_ORI | (free_run ? GTMDR_FRR : 0));
- out_be16(tmr->gtcnr, 0);
- out_be16(tmr->gtrfr, reference_value);
- out_be16(tmr->gtevr, 0xFFFF);
-
- /* Let it be. */
- clrbits8(tmr->gtcfr, GTCFR_STP(num));
-
- spin_unlock_irqrestore(&gtm->lock, flags);
-
- return 0;
-}
-
-/**
- * gtm_set_timer16 - (re)set 16 bit timer with arbitrary precision
- * @tmr: pointer to the gtm_timer structure obtained from gtm_get_timer
- * @usec: timer interval in microseconds
- * @reload: if set, the timer will reset upon expiry rather than
- * continue running free.
- * Context: any
- *
- * This function (re)sets the GTM timer so that it counts up to the requested
- * interval value, and fires the interrupt when the value is reached. This
- * function will reduce the precision of the timer as needed in order for the
- * requested timeout to fit in a 16-bit register.
- */
-int gtm_set_timer16(struct gtm_timer *tmr, unsigned long usec, bool reload)
-{
- /* quite obvious, frequency which is enough for µSec precision */
- int freq = 1000000;
- unsigned int bit;
-
- bit = fls_long(usec);
- if (bit > 15) {
- freq >>= bit - 15;
- usec >>= bit - 15;
- }
-
- if (!freq)
- return -EINVAL;
-
- return gtm_set_ref_timer16(tmr, freq, usec, reload);
-}
-EXPORT_SYMBOL(gtm_set_timer16);
-
-/**
- * gtm_set_exact_utimer16 - (re)set 16 bits timer
- * @tmr: pointer to the gtm_timer structure obtained from gtm_get_timer
- * @usec: timer interval in microseconds
- * @reload: if set, the timer will reset upon expiry rather than
- * continue running free.
- * Context: any
- *
- * This function (re)sets GTM timer so that it counts up to the requested
- * interval value, and fires the interrupt when the value is reached. If reload
- * flag was set, timer will also reset itself upon reference value, otherwise
- * it continues to increment.
- *
- * The _exact_ bit in the function name states that this function will not
- * crop precision of the "usec" argument, thus usec is limited to 16 bits
- * (single timer width).
- */
-int gtm_set_exact_timer16(struct gtm_timer *tmr, u16 usec, bool reload)
-{
- /* quite obvious, frequency which is enough for µSec precision */
- const int freq = 1000000;
-
- /*
- * We can lower the frequency (and probably power consumption) by
- * dividing both frequency and usec by 2 until there is no remainder.
- * But we won't bother with this unless savings are measured, so just
- * run the timer as is.
- */
-
- return gtm_set_ref_timer16(tmr, freq, usec, reload);
-}
-EXPORT_SYMBOL(gtm_set_exact_timer16);
-
-/**
- * gtm_stop_timer16 - stop single timer
- * @tmr: pointer to the gtm_timer structure obtained from gtm_get_timer
- * Context: any
- *
- * This function simply stops the GTM timer.
- */
-void gtm_stop_timer16(struct gtm_timer *tmr)
-{
- struct gtm *gtm = tmr->gtm;
- int num = tmr - &gtm->timers[0];
- unsigned long flags;
-
- spin_lock_irqsave(&gtm->lock, flags);
-
- setbits8(tmr->gtcfr, GTCFR_STP(num));
- out_be16(tmr->gtevr, 0xFFFF);
-
- spin_unlock_irqrestore(&gtm->lock, flags);
-}
-EXPORT_SYMBOL(gtm_stop_timer16);
-
-/**
- * gtm_ack_timer16 - acknowledge timer event (free-run timers only)
- * @tmr: pointer to the gtm_timer structure obtained from gtm_get_timer
- * @events: events mask to ack
- * Context: any
- *
- * Thus function used to acknowledge timer interrupt event, use it inside the
- * interrupt handler.
- */
-void gtm_ack_timer16(struct gtm_timer *tmr, u16 events)
-{
- out_be16(tmr->gtevr, events);
-}
-EXPORT_SYMBOL(gtm_ack_timer16);
-
-static void __init gtm_set_shortcuts(struct device_node *np,
- struct gtm_timer *timers,
- struct gtm_timers_regs __iomem *regs)
-{
- /*
- * Yeah, I don't like this either, but timers' registers a bit messed,
- * so we have to provide shortcuts to write timer independent code.
- * Alternative option is to create gt*() accessors, but that will be
- * even uglier and cryptic.
- */
- timers[0].gtcfr = &regs->gtcfr1;
- timers[0].gtmdr = &regs->gtmdr1;
- timers[0].gtcnr = &regs->gtcnr1;
- timers[0].gtrfr = &regs->gtrfr1;
- timers[0].gtevr = &regs->gtevr1;
-
- timers[1].gtcfr = &regs->gtcfr1;
- timers[1].gtmdr = &regs->gtmdr2;
- timers[1].gtcnr = &regs->gtcnr2;
- timers[1].gtrfr = &regs->gtrfr2;
- timers[1].gtevr = &regs->gtevr2;
-
- timers[2].gtcfr = &regs->gtcfr2;
- timers[2].gtmdr = &regs->gtmdr3;
- timers[2].gtcnr = &regs->gtcnr3;
- timers[2].gtrfr = &regs->gtrfr3;
- timers[2].gtevr = &regs->gtevr3;
-
- timers[3].gtcfr = &regs->gtcfr2;
- timers[3].gtmdr = &regs->gtmdr4;
- timers[3].gtcnr = &regs->gtcnr4;
- timers[3].gtrfr = &regs->gtrfr4;
- timers[3].gtevr = &regs->gtevr4;
-
- /* CPM2 doesn't have primary prescaler */
- if (!of_device_is_compatible(np, "fsl,cpm2-gtm")) {
- timers[0].gtpsr = &regs->gtpsr1;
- timers[1].gtpsr = &regs->gtpsr2;
- timers[2].gtpsr = &regs->gtpsr3;
- timers[3].gtpsr = &regs->gtpsr4;
- }
-}
-
-static int __init fsl_gtm_init(void)
-{
- struct device_node *np;
-
- for_each_compatible_node(np, NULL, "fsl,gtm") {
- int i;
- struct gtm *gtm;
- const u32 *clock;
- int size;
-
- gtm = kzalloc(sizeof(*gtm), GFP_KERNEL);
- if (!gtm) {
- pr_err("%s: unable to allocate memory\n",
- np->full_name);
- continue;
- }
-
- spin_lock_init(&gtm->lock);
-
- clock = of_get_property(np, "clock-frequency", &size);
- if (!clock || size != sizeof(*clock)) {
- pr_err("%s: no clock-frequency\n", np->full_name);
- goto err;
- }
- gtm->clock = *clock;
-
- for (i = 0; i < ARRAY_SIZE(gtm->timers); i++) {
- int ret;
- struct resource irq;
-
- ret = of_irq_to_resource(np, i, &irq);
- if (ret == NO_IRQ) {
- pr_err("%s: not enough interrupts specified\n",
- np->full_name);
- goto err;
- }
- gtm->timers[i].irq = irq.start;
- gtm->timers[i].gtm = gtm;
- }
-
- gtm->regs = of_iomap(np, 0);
- if (!gtm->regs) {
- pr_err("%s: unable to iomap registers\n",
- np->full_name);
- goto err;
- }
-
- gtm_set_shortcuts(np, gtm->timers, gtm->regs);
- list_add(&gtm->list_node, &gtms);
-
- /* We don't want to lose the node and its ->data */
- np->data = gtm;
- of_node_get(np);
-
- continue;
-err:
- kfree(gtm);
- }
- return 0;
-}
-arch_initcall(fsl_gtm_init);
generated by cgit (git 2.34.1) at 2025-01-11 06:46:11 +0000