diff options
Diffstat (limited to 'arch/arm/mach-zynq')
| -rw-r--r-- | arch/arm/mach-zynq/Kconfig | 13 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/common.c | 80 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/common.h | 4 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/clkdev.h | 32 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/debug-macro.S | 36 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/hardware.h | 18 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/irqs.h | 21 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/timex.h | 23 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/uart.h | 25 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/uncompress.h | 51 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/include/mach/zynq_soc.h | 48 | ||||
| -rw-r--r-- | arch/arm/mach-zynq/timer.c | 298 |
12 files changed, 223 insertions, 426 deletions
diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig new file mode 100644 index 000000000000..adb6c0ea0e53 --- /dev/null +++ b/arch/arm/mach-zynq/Kconfig @@ -0,0 +1,13 @@ +config ARCH_ZYNQ + bool "Xilinx Zynq ARM Cortex A9 Platform" if ARCH_MULTI_V7 + select ARM_AMBA + select ARM_GIC + select COMMON_CLK + select CPU_V7 + select GENERIC_CLOCKEVENTS + select ICST + select MIGHT_HAVE_CACHE_L2X0 + select USE_OF + select SPARSE_IRQ + help + Support for Xilinx Zynq ARM Cortex A9 Platform diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c index ab5cfddc0d7b..e16d4bed0f7a 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -19,19 +19,21 @@ #include <linux/cpumask.h> #include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/clk/zynq.h> +#include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/of.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> +#include <asm/mach/time.h> #include <asm/mach-types.h> #include <asm/page.h> +#include <asm/pgtable.h> #include <asm/hardware/gic.h> #include <asm/hardware/cache-l2x0.h> -#include <mach/zynq_soc.h> -#include <mach/clkdev.h> #include "common.h" static struct of_device_id zynq_of_bus_ids[] __initdata = { @@ -45,55 +47,57 @@ static struct of_device_id zynq_of_bus_ids[] __initdata = { */ static void __init xilinx_init_machine(void) { -#ifdef CONFIG_CACHE_L2X0 /* * 64KB way size, 8-way associativity, parity disabled */ - l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF); -#endif + l2x0_of_init(0x02060000, 0xF0F0FFFF); of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL); } +static struct of_device_id irq_match[] __initdata = { + { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, + { } +}; + /** * xilinx_irq_init() - Interrupt controller initialization for the GIC. */ static void __init xilinx_irq_init(void) { - gic_init(0, 29, SCU_GIC_DIST_BASE, SCU_GIC_CPU_BASE); + of_irq_init(irq_match); } -/* The minimum devices needed to be mapped before the VM system is up and - * running include the GIC, UART and Timer Counter. - */ +#define SCU_PERIPH_PHYS 0xF8F00000 +#define SCU_PERIPH_SIZE SZ_8K +#define SCU_PERIPH_VIRT (VMALLOC_END - SCU_PERIPH_SIZE) + +static struct map_desc scu_desc __initdata = { + .virtual = SCU_PERIPH_VIRT, + .pfn = __phys_to_pfn(SCU_PERIPH_PHYS), + .length = SCU_PERIPH_SIZE, + .type = MT_DEVICE, +}; + +static void __init xilinx_zynq_timer_init(void) +{ + struct device_node *np; + void __iomem *slcr; + + np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-slcr"); + slcr = of_iomap(np, 0); + WARN_ON(!slcr); + + xilinx_zynq_clocks_init(slcr); -static struct map_desc io_desc[] __initdata = { - { - .virtual = TTC0_VIRT, - .pfn = __phys_to_pfn(TTC0_PHYS), - .length = SZ_4K, - .type = MT_DEVICE, - }, { - .virtual = SCU_PERIPH_VIRT, - .pfn = __phys_to_pfn(SCU_PERIPH_PHYS), - .length = SZ_8K, - .type = MT_DEVICE, - }, { - .virtual = PL310_L2CC_VIRT, - .pfn = __phys_to_pfn(PL310_L2CC_PHYS), - .length = SZ_4K, - .type = MT_DEVICE, - }, - -#ifdef CONFIG_DEBUG_LL - { - .virtual = UART0_VIRT, - .pfn = __phys_to_pfn(UART0_PHYS), - .length = SZ_4K, - .type = MT_DEVICE, - }, -#endif + xttcpss_timer_init(); +} +/* + * Instantiate and initialize the system timer structure + */ +static struct sys_timer xttcpss_sys_timer = { + .init = xilinx_zynq_timer_init, }; /** @@ -101,11 +105,13 @@ static struct map_desc io_desc[] __initdata = { */ static void __init xilinx_map_io(void) { - iotable_init(io_desc, ARRAY_SIZE(io_desc)); + debug_ll_io_init(); + iotable_init(&scu_desc, 1); } static const char *xilinx_dt_match[] = { - "xlnx,zynq-ep107", + "xlnx,zynq-zc702", + "xlnx,zynq-7000", NULL }; diff --git a/arch/arm/mach-zynq/common.h b/arch/arm/mach-zynq/common.h index a009644a1555..954b91c13c91 100644 --- a/arch/arm/mach-zynq/common.h +++ b/arch/arm/mach-zynq/common.h @@ -17,8 +17,6 @@ #ifndef __MACH_ZYNQ_COMMON_H__ #define __MACH_ZYNQ_COMMON_H__ -#include <asm/mach/time.h> - -extern struct sys_timer xttcpss_sys_timer; +void __init xttcpss_timer_init(void); #endif diff --git a/arch/arm/mach-zynq/include/mach/clkdev.h b/arch/arm/mach-zynq/include/mach/clkdev.h deleted file mode 100644 index c6e73d81a459..000000000000 --- a/arch/arm/mach-zynq/include/mach/clkdev.h +++ /dev/null @@ -1,32 +0,0 @@ -/* - * arch/arm/mach-zynq/include/mach/clkdev.h - * - * Copyright (C) 2011 Xilinx, Inc. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#ifndef __MACH_CLKDEV_H__ -#define __MACH_CLKDEV_H__ - -#include <plat/clock.h> - -struct clk { - unsigned long rate; - const struct clk_ops *ops; - const struct icst_params *params; - void __iomem *vcoreg; -}; - -#define __clk_get(clk) ({ 1; }) -#define __clk_put(clk) do { } while (0) - -#endif diff --git a/arch/arm/mach-zynq/include/mach/debug-macro.S b/arch/arm/mach-zynq/include/mach/debug-macro.S deleted file mode 100644 index 3ab0be1f6191..000000000000 --- a/arch/arm/mach-zynq/include/mach/debug-macro.S +++ /dev/null @@ -1,36 +0,0 @@ -/* arch/arm/mach-zynq/include/mach/debug-macro.S - * - * Debugging macro include header - * - * Copyright (C) 2011 Xilinx - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <mach/zynq_soc.h> -#include <mach/uart.h> - - .macro addruart, rp, rv, tmp - ldr \rp, =LL_UART_PADDR @ physical - ldr \rv, =LL_UART_VADDR @ virtual - .endm - - .macro senduart,rd,rx - str \rd, [\rx, #UART_FIFO_OFFSET] @ TXDATA - .endm - - .macro waituart,rd,rx - .endm - - .macro busyuart,rd,rx -1002: ldr \rd, [\rx, #UART_SR_OFFSET] @ get status register - tst \rd, #UART_SR_TXFULL @ - bne 1002b @ wait if FIFO is full - .endm diff --git a/arch/arm/mach-zynq/include/mach/hardware.h b/arch/arm/mach-zynq/include/mach/hardware.h deleted file mode 100644 index d558d8a94be7..000000000000 --- a/arch/arm/mach-zynq/include/mach/hardware.h +++ /dev/null @@ -1,18 +0,0 @@ -/* arch/arm/mach-zynq/include/mach/hardware.h - * - * Copyright (C) 2011 Xilinx - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __MACH_HARDWARE_H__ -#define __MACH_HARDWARE_H__ - -#endif diff --git a/arch/arm/mach-zynq/include/mach/irqs.h b/arch/arm/mach-zynq/include/mach/irqs.h deleted file mode 100644 index 5fb04fd3bac8..000000000000 --- a/arch/arm/mach-zynq/include/mach/irqs.h +++ /dev/null @@ -1,21 +0,0 @@ -/* arch/arm/mach-zynq/include/mach/irqs.h - * - * Copyright (C) 2011 Xilinx - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __MACH_IRQS_H -#define __MACH_IRQS_H - -#define ARCH_NR_GPIOS 118 -#define NR_IRQS (128 + ARCH_NR_GPIOS) - -#endif diff --git a/arch/arm/mach-zynq/include/mach/timex.h b/arch/arm/mach-zynq/include/mach/timex.h deleted file mode 100644 index 6c0245e42a5e..000000000000 --- a/arch/arm/mach-zynq/include/mach/timex.h +++ /dev/null @@ -1,23 +0,0 @@ -/* arch/arm/mach-zynq/include/mach/timex.h - * - * Copyright (C) 2011 Xilinx - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __MACH_TIMEX_H__ -#define __MACH_TIMEX_H__ - -/* the following is needed for the system to build but will be removed - in the future, the value is not important but won't hurt -*/ -#define CLOCK_TICK_RATE (100 * HZ) - -#endif diff --git a/arch/arm/mach-zynq/include/mach/uart.h b/arch/arm/mach-zynq/include/mach/uart.h deleted file mode 100644 index 5c47c97156f3..000000000000 --- a/arch/arm/mach-zynq/include/mach/uart.h +++ /dev/null @@ -1,25 +0,0 @@ -/* arch/arm/mach-zynq/include/mach/uart.h - * - * Copyright (C) 2011 Xilinx - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __MACH_UART_H__ -#define __MACH_UART_H__ - -#define UART_CR_OFFSET 0x00 /* Control Register [8:0] */ -#define UART_SR_OFFSET 0x2C /* Channel Status [11:0] */ -#define UART_FIFO_OFFSET 0x30 /* FIFO [15:0] or [7:0] */ - -#define UART_SR_TXFULL 0x00000010 /* TX FIFO full */ -#define UART_SR_TXEMPTY 0x00000008 /* TX FIFO empty */ - -#endif diff --git a/arch/arm/mach-zynq/include/mach/uncompress.h b/arch/arm/mach-zynq/include/mach/uncompress.h deleted file mode 100644 index af4e8447bfa3..000000000000 --- a/arch/arm/mach-zynq/include/mach/uncompress.h +++ /dev/null @@ -1,51 +0,0 @@ -/* arch/arm/mach-zynq/include/mach/uncompress.h - * - * Copyright (C) 2011 Xilinx - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __MACH_UNCOMPRESS_H__ -#define __MACH_UNCOMPRESS_H__ - -#include <linux/io.h> -#include <asm/processor.h> -#include <mach/zynq_soc.h> -#include <mach/uart.h> - -void arch_decomp_setup(void) -{ -} - -static inline void flush(void) -{ - /* - * Wait while the FIFO is not empty - */ - while (!(__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) & - UART_SR_TXEMPTY)) - cpu_relax(); -} - -#define arch_decomp_wdog() - -static void putc(char ch) -{ - /* - * Wait for room in the FIFO, then write the char into the FIFO - */ - while (__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) & - UART_SR_TXFULL) - cpu_relax(); - - __raw_writel(ch, IOMEM(LL_UART_PADDR + UART_FIFO_OFFSET)); -} - -#endif diff --git a/arch/arm/mach-zynq/include/mach/zynq_soc.h b/arch/arm/mach-zynq/include/mach/zynq_soc.h deleted file mode 100644 index d0d3f8fb06dd..000000000000 --- a/arch/arm/mach-zynq/include/mach/zynq_soc.h +++ /dev/null @@ -1,48 +0,0 @@ -/* arch/arm/mach-zynq/include/mach/zynq_soc.h - * - * Copyright (C) 2011 Xilinx - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __MACH_XILINX_SOC_H__ -#define __MACH_XILINX_SOC_H__ - -#define PERIPHERAL_CLOCK_RATE 2500000 - -/* For now, all mappings are flat (physical = virtual) - */ -#define UART0_PHYS 0xE0000000 -#define UART0_VIRT UART0_PHYS - -#define TTC0_PHYS 0xF8001000 -#define TTC0_VIRT TTC0_PHYS - -#define PL310_L2CC_PHYS 0xF8F02000 -#define PL310_L2CC_VIRT PL310_L2CC_PHYS - -#define SCU_PERIPH_PHYS 0xF8F00000 -#define SCU_PERIPH_VIRT SCU_PERIPH_PHYS - -/* The following are intended for the devices that are mapped early */ - -#define TTC0_BASE IOMEM(TTC0_VIRT) -#define SCU_PERIPH_BASE IOMEM(SCU_PERIPH_VIRT) -#define SCU_GIC_CPU_BASE (SCU_PERIPH_BASE + 0x100) -#define SCU_GIC_DIST_BASE (SCU_PERIPH_BASE + 0x1000) -#define PL310_L2CC_BASE IOMEM(PL310_L2CC_VIRT) - -/* - * Mandatory for CONFIG_LL_DEBUG, UART is mapped virtual = physical - */ -#define LL_UART_PADDR UART0_PHYS -#define LL_UART_VADDR UART0_VIRT - -#endif diff --git a/arch/arm/mach-zynq/timer.c b/arch/arm/mach-zynq/timer.c index c2c96cc7d6e7..de3df283da74 100644 --- a/arch/arm/mach-zynq/timer.c +++ b/arch/arm/mach-zynq/timer.c @@ -23,32 +23,14 @@ #include <linux/clocksource.h> #include <linux/clockchips.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/slab.h> +#include <linux/clk-provider.h> -#include <asm/mach/time.h> -#include <mach/zynq_soc.h> #include "common.h" -#define IRQ_TIMERCOUNTER0 42 - -/* - * This driver configures the 2 16-bit count-up timers as follows: - * - * T1: Timer 1, clocksource for generic timekeeping - * T2: Timer 2, clockevent source for hrtimers - * T3: Timer 3, <unused> - * - * The input frequency to the timer module for emulation is 2.5MHz which is - * common to all the timer channels (T1, T2, and T3). With a pre-scaler of 32, - * the timers are clocked at 78.125KHz (12.8 us resolution). - * - * The input frequency to the timer module in silicon will be 200MHz. With the - * pre-scaler of 32, the timers are clocked at 6.25MHz (160ns resolution). - */ -#define XTTCPSS_CLOCKSOURCE 0 /* Timer 1 as a generic timekeeping */ -#define XTTCPSS_CLOCKEVENT 1 /* Timer 2 as a clock event */ - -#define XTTCPSS_TIMER_BASE TTC0_BASE -#define XTTCPCC_EVENT_TIMER_IRQ (IRQ_TIMERCOUNTER0 + 1) /* * Timer Register Offset Definitions of Timer 1, Increment base address by 4 * and use same offsets for Timer 2 @@ -65,9 +47,14 @@ #define XTTCPSS_CNT_CNTRL_DISABLE_MASK 0x1 -/* Setup the timers to use pre-scaling */ - -#define TIMER_RATE (PERIPHERAL_CLOCK_RATE / 32) +/* Setup the timers to use pre-scaling, using a fixed value for now that will + * work across most input frequency, but it may need to be more dynamic + */ +#define PRESCALE_EXPONENT 11 /* 2 ^ PRESCALE_EXPONENT = PRESCALE */ +#define PRESCALE 2048 /* The exponent must match this */ +#define CLK_CNTRL_PRESCALE ((PRESCALE_EXPONENT - 1) << 1) +#define CLK_CNTRL_PRESCALE_EN 1 +#define CNT_CNTRL_RESET (1<<4) /** * struct xttcpss_timer - This definition defines local timer structure @@ -75,11 +62,25 @@ * @base_addr: Base address of timer **/ struct xttcpss_timer { - void __iomem *base_addr; + void __iomem *base_addr; }; -static struct xttcpss_timer timers[2]; -static struct clock_event_device xttcpss_clockevent; +struct xttcpss_timer_clocksource { + struct xttcpss_timer xttc; + struct clocksource cs; +}; + +#define to_xttcpss_timer_clksrc(x) \ + container_of(x, struct xttcpss_timer_clocksource, cs) + +struct xttcpss_timer_clockevent { + struct xttcpss_timer xttc; + struct clock_event_device ce; + struct clk *clk; +}; + +#define to_xttcpss_timer_clkevent(x) \ + container_of(x, struct xttcpss_timer_clockevent, ce) /** * xttcpss_set_interval - Set the timer interval value @@ -101,7 +102,7 @@ static void xttcpss_set_interval(struct xttcpss_timer *timer, /* Reset the counter (0x10) so that it starts from 0, one-shot mode makes this needed for timing to be right. */ - ctrl_reg |= 0x10; + ctrl_reg |= CNT_CNTRL_RESET; ctrl_reg &= ~XTTCPSS_CNT_CNTRL_DISABLE_MASK; __raw_writel(ctrl_reg, timer->base_addr + XTTCPSS_CNT_CNTRL_OFFSET); } @@ -116,90 +117,31 @@ static void xttcpss_set_interval(struct xttcpss_timer *timer, **/ static irqreturn_t xttcpss_clock_event_interrupt(int irq, void *dev_id) { - struct clock_event_device *evt = &xttcpss_clockevent; - struct xttcpss_timer *timer = dev_id; + struct xttcpss_timer_clockevent *xttce = dev_id; + struct xttcpss_timer *timer = &xttce->xttc; /* Acknowledge the interrupt and call event handler */ __raw_writel(__raw_readl(timer->base_addr + XTTCPSS_ISR_OFFSET), timer->base_addr + XTTCPSS_ISR_OFFSET); - evt->event_handler(evt); + xttce->ce.event_handler(&xttce->ce); return IRQ_HANDLED; } -static struct irqaction event_timer_irq = { - .name = "xttcpss clockevent", - .flags = IRQF_DISABLED | IRQF_TIMER, - .handler = xttcpss_clock_event_interrupt, -}; - /** - * xttcpss_timer_hardware_init - Initialize the timer hardware - * - * Initialize the hardware to start the clock source, get the clock - * event timer ready to use, and hook up the interrupt. - **/ -static void __init xttcpss_timer_hardware_init(void) -{ - /* Setup the clock source counter to be an incrementing counter - * with no interrupt and it rolls over at 0xFFFF. Pre-scale - it by 32 also. Let it start running now. - */ - timers[XTTCPSS_CLOCKSOURCE].base_addr = XTTCPSS_TIMER_BASE; - - __raw_writel(0x0, timers[XTTCPSS_CLOCKSOURCE].base_addr + - XTTCPSS_IER_OFFSET); - __raw_writel(0x9, timers[XTTCPSS_CLOCKSOURCE].base_addr + - XTTCPSS_CLK_CNTRL_OFFSET); - __raw_writel(0x10, timers[XTTCPSS_CLOCKSOURCE].base_addr + - XTTCPSS_CNT_CNTRL_OFFSET); - - /* Setup the clock event timer to be an interval timer which - * is prescaled by 32 using the interval interrupt. Leave it - * disabled for now. - */ - - timers[XTTCPSS_CLOCKEVENT].base_addr = XTTCPSS_TIMER_BASE + 4; - - __raw_writel(0x23, timers[XTTCPSS_CLOCKEVENT].base_addr + - XTTCPSS_CNT_CNTRL_OFFSET); - __raw_writel(0x9, timers[XTTCPSS_CLOCKEVENT].base_addr + - XTTCPSS_CLK_CNTRL_OFFSET); - __raw_writel(0x1, timers[XTTCPSS_CLOCKEVENT].base_addr + - XTTCPSS_IER_OFFSET); - - /* Setup IRQ the clock event timer */ - event_timer_irq.dev_id = &timers[XTTCPSS_CLOCKEVENT]; - setup_irq(XTTCPCC_EVENT_TIMER_IRQ, &event_timer_irq); -} - -/** - * __raw_readl_cycles - Reads the timer counter register + * __xttc_clocksource_read - Reads the timer counter register * * returns: Current timer counter register value **/ -static cycle_t __raw_readl_cycles(struct clocksource *cs) +static cycle_t __xttc_clocksource_read(struct clocksource *cs) { - struct xttcpss_timer *timer = &timers[XTTCPSS_CLOCKSOURCE]; + struct xttcpss_timer *timer = &to_xttcpss_timer_clksrc(cs)->xttc; return (cycle_t)__raw_readl(timer->base_addr + XTTCPSS_COUNT_VAL_OFFSET); } - -/* - * Instantiate and initialize the clock source structure - */ -static struct clocksource clocksource_xttcpss = { - .name = "xttcpss_timer1", - .rating = 200, /* Reasonable clock source */ - .read = __raw_readl_cycles, - .mask = CLOCKSOURCE_MASK(16), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - - /** * xttcpss_set_next_event - Sets the time interval for next event * @@ -211,7 +153,8 @@ static struct clocksource clocksource_xttcpss = { static int xttcpss_set_next_event(unsigned long cycles, struct clock_event_device *evt) { - struct xttcpss_timer *timer = &timers[XTTCPSS_CLOCKEVENT]; + struct xttcpss_timer_clockevent *xttce = to_xttcpss_timer_clkevent(evt); + struct xttcpss_timer *timer = &xttce->xttc; xttcpss_set_interval(timer, cycles); return 0; @@ -226,12 +169,15 @@ static int xttcpss_set_next_event(unsigned long cycles, static void xttcpss_set_mode(enum clock_event_mode mode, struct clock_event_device *evt) { - struct xttcpss_timer *timer = &timers[XTTCPSS_CLOCKEVENT]; + struct xttcpss_timer_clockevent *xttce = to_xttcpss_timer_clkevent(evt); + struct xttcpss_timer *timer = &xttce->xttc; u32 ctrl_reg; switch (mode) { case CLOCK_EVT_MODE_PERIODIC: - xttcpss_set_interval(timer, TIMER_RATE / HZ); + xttcpss_set_interval(timer, + DIV_ROUND_CLOSEST(clk_get_rate(xttce->clk), + PRESCALE * HZ)); break; case CLOCK_EVT_MODE_ONESHOT: case CLOCK_EVT_MODE_UNUSED: @@ -252,15 +198,106 @@ static void xttcpss_set_mode(enum clock_event_mode mode, } } -/* - * Instantiate and initialize the clock event structure - */ -static struct clock_event_device xttcpss_clockevent = { - .name = "xttcpss_timer2", - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .set_next_event = xttcpss_set_next_event, - .set_mode = xttcpss_set_mode, - .rating = 200, +static void __init zynq_ttc_setup_clocksource(struct device_node *np, + void __iomem *base) +{ + struct xttcpss_timer_clocksource *ttccs; + struct clk *clk; + int err; + u32 reg; + + ttccs = kzalloc(sizeof(*ttccs), GFP_KERNEL); + if (WARN_ON(!ttccs)) + return; + + err = of_property_read_u32(np, "reg", ®); + if (WARN_ON(err)) + return; + + clk = of_clk_get_by_name(np, "cpu_1x"); + if (WARN_ON(IS_ERR(clk))) + return; + + err = clk_prepare_enable(clk); + if (WARN_ON(err)) + return; + + ttccs->xttc.base_addr = base + reg * 4; + + ttccs->cs.name = np->name; + ttccs->cs.rating = 200; + ttccs->cs.read = __xttc_clocksource_read; + ttccs->cs.mask = CLOCKSOURCE_MASK(16); + ttccs->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS; + + __raw_writel(0x0, ttccs->xttc.base_addr + XTTCPSS_IER_OFFSET); + __raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN, + ttccs->xttc.base_addr + XTTCPSS_CLK_CNTRL_OFFSET); + __raw_writel(CNT_CNTRL_RESET, + ttccs->xttc.base_addr + XTTCPSS_CNT_CNTRL_OFFSET); + + err = clocksource_register_hz(&ttccs->cs, clk_get_rate(clk) / PRESCALE); + if (WARN_ON(err)) + return; +} + +static void __init zynq_ttc_setup_clockevent(struct device_node *np, + void __iomem *base) +{ + struct xttcpss_timer_clockevent *ttcce; + int err, irq; + u32 reg; + + ttcce = kzalloc(sizeof(*ttcce), GFP_KERNEL); + if (WARN_ON(!ttcce)) + return; + + err = of_property_read_u32(np, "reg", ®); + if (WARN_ON(err)) + return; + + ttcce->xttc.base_addr = base + reg * 4; + + ttcce->clk = of_clk_get_by_name(np, "cpu_1x"); + if (WARN_ON(IS_ERR(ttcce->clk))) + return; + + err = clk_prepare_enable(ttcce->clk); + if (WARN_ON(err)) + return; + + irq = irq_of_parse_and_map(np, 0); + if (WARN_ON(!irq)) + return; + + ttcce->ce.name = np->name; + ttcce->ce.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; + ttcce->ce.set_next_event = xttcpss_set_next_event; + ttcce->ce.set_mode = xttcpss_set_mode; + ttcce->ce.rating = 200; + ttcce->ce.irq = irq; + + __raw_writel(0x23, ttcce->xttc.base_addr + XTTCPSS_CNT_CNTRL_OFFSET); + __raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN, + ttcce->xttc.base_addr + XTTCPSS_CLK_CNTRL_OFFSET); + __raw_writel(0x1, ttcce->xttc.base_addr + XTTCPSS_IER_OFFSET); + + err = request_irq(irq, xttcpss_clock_event_interrupt, IRQF_TIMER, + np->name, ttcce); + if (WARN_ON(err)) + return; + + clockevents_config_and_register(&ttcce->ce, + clk_get_rate(ttcce->clk) / PRESCALE, + 1, 0xfffe); +} + +static const __initconst struct of_device_id zynq_ttc_match[] = { + { .compatible = "xlnx,ttc-counter-clocksource", + .data = zynq_ttc_setup_clocksource, }, + { .compatible = "xlnx,ttc-counter-clockevent", + .data = zynq_ttc_setup_clockevent, }, + {} }; /** @@ -269,30 +306,27 @@ static struct clock_event_device xttcpss_clockevent = { * Initializes the timer hardware and register the clock source and clock event * timers with Linux kernal timer framework **/ -static void __init xttcpss_timer_init(void) +void __init xttcpss_timer_init(void) { - xttcpss_timer_hardware_init(); - clocksource_register_hz(&clocksource_xttcpss, TIMER_RATE); - - /* Calculate the parameters to allow the clockevent to operate using - integer math - */ - clockevents_calc_mult_shift(&xttcpss_clockevent, TIMER_RATE, 4); - - xttcpss_clockevent.max_delta_ns = - clockevent_delta2ns(0xfffe, &xttcpss_clockevent); - xttcpss_clockevent.min_delta_ns = - clockevent_delta2ns(1, &xttcpss_clockevent); - - /* Indicate that clock event is on 1st CPU as SMP boot needs it */ - - xttcpss_clockevent.cpumask = cpumask_of(0); - clockevents_register_device(&xttcpss_clockevent); + struct device_node *np; + + for_each_compatible_node(np, NULL, "xlnx,ttc") { + struct device_node *np_chld; + void __iomem *base; + + base = of_iomap(np, 0); + if (WARN_ON(!base)) + return; + + for_each_available_child_of_node(np, np_chld) { + int (*cb)(struct device_node *np, void __iomem *base); + const struct of_device_id *match; + + match = of_match_node(zynq_ttc_match, np_chld); + if (match) { + cb = match->data; + cb(np_chld, base); + } + } + } } - -/* - * Instantiate and initialize the system timer structure - */ -struct sys_timer xttcpss_sys_timer = { - .init = xttcpss_timer_init, -}; |
