diff options
Diffstat (limited to 'target/linux/realtek/files-5.10/arch/mips/kernel/cevt-rtl9300.c')
| -rw-r--r-- | target/linux/realtek/files-5.10/arch/mips/kernel/cevt-rtl9300.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/target/linux/realtek/files-5.10/arch/mips/kernel/cevt-rtl9300.c b/target/linux/realtek/files-5.10/arch/mips/kernel/cevt-rtl9300.c deleted file mode 100644 index 1c8c30de5d..0000000000 --- a/target/linux/realtek/files-5.10/arch/mips/kernel/cevt-rtl9300.c +++ /dev/null @@ -1,200 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only - -#include <linux/clockchips.h> -#include <linux/init.h> -#include <asm/time.h> -#include <asm/idle.h> -#include <linux/interrupt.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/sched_clock.h> - -#include <mach-rtl83xx.h> - -/* - * Timer registers - * the RTL9300/9310 SoCs have 6 timers, each register block 0x10 apart - */ -#define RTL9300_TC_DATA 0x0 -#define RTL9300_TC_CNT 0x4 -#define RTL9300_TC_CTRL 0x8 -#define RTL9300_TC_CTRL_MODE BIT(24) -#define RTL9300_TC_CTRL_EN BIT(28) -#define RTL9300_TC_INT 0xc -#define RTL9300_TC_INT_IP BIT(16) -#define RTL9300_TC_INT_IE BIT(20) - -// Timer modes -#define TIMER_MODE_REPEAT 1 -#define TIMER_MODE_ONCE 0 - -// Minimum divider is 2 -#define DIVISOR_RTL9300 2 - -#define N_BITS 28 - -#define RTL9300_CLOCK_RATE 87500000 - -struct rtl9300_clk_dev { - struct clock_event_device clkdev; - void __iomem *base; -}; - -static void __iomem *rtl9300_tc_base(struct clock_event_device *clk) -{ - struct rtl9300_clk_dev *rtl_clk = container_of(clk, struct rtl9300_clk_dev, clkdev); - - return rtl_clk->base; -} - -static irqreturn_t rtl9300_timer_interrupt(int irq, void *dev_id) -{ - struct rtl9300_clk_dev *rtl_clk = dev_id; - struct clock_event_device *clk = &rtl_clk->clkdev; - - u32 v = readl(rtl_clk->base + RTL9300_TC_INT); - - // Acknowledge the IRQ - v |= RTL9300_TC_INT_IP; - writel(v, rtl_clk->base + RTL9300_TC_INT); - - clk->event_handler(clk); - return IRQ_HANDLED; -} - -static void rtl9300_clock_stop(void __iomem *base) -{ - u32 v; - - writel(0, base + RTL9300_TC_CTRL); - - // Acknowledge possibly pending IRQ - v = readl(base + RTL9300_TC_INT); - writel(v | RTL9300_TC_INT_IP, base + RTL9300_TC_INT); -} - -static void rtl9300_timer_start(void __iomem *base, bool periodic) -{ - u32 v = (periodic ? RTL9300_TC_CTRL_MODE : 0) | RTL9300_TC_CTRL_EN | DIVISOR_RTL9300; - - writel(0, base + RTL9300_TC_CNT); - pr_debug("------------- starting timer base %08x\n", (u32)base); - writel(v, base + RTL9300_TC_CTRL); -} - -static int rtl9300_next_event(unsigned long delta, struct clock_event_device *clk) -{ - void __iomem *base = rtl9300_tc_base(clk); - - rtl9300_clock_stop(base); - writel(delta, base + RTL9300_TC_DATA); - rtl9300_timer_start(base, TIMER_MODE_ONCE); - - return 0; -} - -static int rtl9300_state_periodic(struct clock_event_device *clk) -{ - void __iomem *base = rtl9300_tc_base(clk); - - pr_debug("------------- rtl9300_state_periodic %08x\n", (u32)base); - rtl9300_clock_stop(base); - writel(RTL9300_CLOCK_RATE / HZ, base + RTL9300_TC_DATA); - rtl9300_timer_start(base, TIMER_MODE_REPEAT); - return 0; -} - -static int rtl9300_state_oneshot(struct clock_event_device *clk) -{ - void __iomem *base = rtl9300_tc_base(clk); - - pr_debug("------------- rtl9300_state_oneshot %08x\n", (u32)base); - rtl9300_clock_stop(base); - writel(RTL9300_CLOCK_RATE / HZ, base + RTL9300_TC_DATA); - rtl9300_timer_start(base, TIMER_MODE_ONCE); - return 0; -} - -static int rtl9300_shutdown(struct clock_event_device *clk) -{ - void __iomem *base = rtl9300_tc_base(clk); - - pr_debug("------------- rtl9300_shutdown %08x\n", (u32)base); - rtl9300_clock_stop(base); - return 0; -} - -static void rtl9300_clock_setup(void __iomem *base) -{ - u32 v; - - // Disable timer - writel(0, base + RTL9300_TC_CTRL); - - // Acknowledge possibly pending IRQ - v = readl(base + RTL9300_TC_INT); - writel(v | RTL9300_TC_INT_IP, base + RTL9300_TC_INT); - - // Setup maximum period (for use as clock-source) - writel(0x0fffffff, base + RTL9300_TC_DATA); -} - -static DEFINE_PER_CPU(struct rtl9300_clk_dev, rtl9300_clockevent); -static DEFINE_PER_CPU(char [18], rtl9300_clock_name); - -void rtl9300_clockevent_init(void) -{ - int cpu = smp_processor_id(); - int irq; - struct rtl9300_clk_dev *rtl_clk = &per_cpu(rtl9300_clockevent, cpu); - struct clock_event_device *cd = &rtl_clk->clkdev; - unsigned char *name = per_cpu(rtl9300_clock_name, cpu); - unsigned long flags = IRQF_PERCPU | IRQF_TIMER; - struct device_node *node; - - pr_info("%s called for cpu%d\n", __func__, cpu); - BUG_ON(cpu > 3); /* Only have 4 general purpose timers */ - - node = of_find_compatible_node(NULL, NULL, "realtek,rtl9300clock"); - if (!node) { - pr_err("No DT entry found for realtek,rtl9300clock\n"); - return; - } - - irq = irq_of_parse_and_map(node, cpu); - pr_info("%s using IRQ %d\n", __func__, irq); - - rtl_clk->base = of_iomap(node, cpu); - if (!rtl_clk->base) { - pr_err("cannot map timer for cpu %d", cpu); - return; - } - - rtl9300_clock_setup(rtl_clk->base); - - sprintf(name, "rtl9300-counter-%d", cpu); - cd->name = name; - cd->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; - - clockevent_set_clock(cd, RTL9300_CLOCK_RATE); - - cd->max_delta_ns = clockevent_delta2ns(0x0fffffff, cd); - cd->max_delta_ticks = 0x0fffffff; - cd->min_delta_ns = clockevent_delta2ns(0x20, cd); - cd->min_delta_ticks = 0x20; - cd->rating = 300; - cd->irq = irq; - cd->cpumask = cpumask_of(cpu); - cd->set_next_event = rtl9300_next_event; - cd->set_state_shutdown = rtl9300_shutdown; - cd->set_state_periodic = rtl9300_state_periodic; - cd->set_state_oneshot = rtl9300_state_oneshot; - clockevents_register_device(cd); - - irq_set_affinity(irq, cd->cpumask); - - if (request_irq(irq, rtl9300_timer_interrupt, flags, name, rtl_clk)) - pr_err("Failed to request irq %d (%s)\n", irq, name); - - writel(RTL9300_TC_INT_IE, rtl_clk->base + RTL9300_TC_INT); -} |