diff options
23 files changed, 936 insertions, 459 deletions
diff --git a/Documentation/devicetree/bindings/clock/zynq-7000.txt b/Documentation/devicetree/bindings/clock/zynq-7000.txt new file mode 100644 index 00000000000..23ae1db1bc1 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/zynq-7000.txt @@ -0,0 +1,55 @@ +Device Tree Clock bindings for the Zynq 7000 EPP + +The Zynq EPP has several different clk providers, each with there own bindings. +The purpose of this document is to document their usage. + +See clock_bindings.txt for more information on the generic clock bindings. +See Chapter 25 of Zynq TRM for more information about Zynq clocks. + +== PLLs == + +Used to describe the ARM_PLL, DDR_PLL, and IO_PLL. + +Required properties: +- #clock-cells : shall be 0 (only one clock is output from this node) +- compatible : "xlnx,zynq-pll" +- reg : pair of u32 values, which are the address offsets within the SLCR + of the relevant PLL_CTRL register and PLL_CFG register respectively +- clocks : phandle for parent clock. should be the phandle for ps_clk + +Optional properties: +- clock-output-names : name of the output clock + +Example: + armpll: armpll { + #clock-cells = <0>; + compatible = "xlnx,zynq-pll"; + clocks = <&ps_clk>; + reg = <0x100 0x110>; + clock-output-names = "armpll"; + }; + +== Peripheral clocks == + +Describes clock node for the SDIO, SMC, SPI, QSPI, and UART clocks. + +Required properties: +- #clock-cells : shall be 1 +- compatible : "xlnx,zynq-periph-clock" +- reg : a single u32 value, describing the offset within the SLCR where + the CLK_CTRL register is found for this peripheral +- clocks : phandle for parent clocks. should hold phandles for + the IO_PLL, ARM_PLL, and DDR_PLL in order +- clock-output-names : names of the output clock(s). For peripherals that have + two output clocks (for example, the UART), two clocks + should be listed. + +Example: + uart_clk: uart_clk { + #clock-cells = <1>; + compatible = "xlnx,zynq-periph-clock"; + clocks = <&iopll &armpll &ddrpll>; + reg = <0x154>; + clock-output-names = "uart0_ref_clk", + "uart1_ref_clk"; + }; diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 9277f503481..d244249178b 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -960,18 +960,6 @@ config ARCH_VT8500_SINGLE help Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip. -config ARCH_ZYNQ - bool "Xilinx Zynq ARM Cortex A9 Platform" - select ARM_AMBA - select ARM_GIC - select CLKDEV_LOOKUP - select CPU_V7 - select GENERIC_CLOCKEVENTS - select ICST - select MIGHT_HAVE_CACHE_L2X0 - select USE_OF - help - Support for Xilinx Zynq ARM Cortex A9 Platform endchoice menu "Multiple platform selection" @@ -1134,6 +1122,8 @@ source "arch/arm/mach-vt8500/Kconfig" source "arch/arm/mach-w90x900/Kconfig" +source "arch/arm/mach-zynq/Kconfig" + # Definitions to make life easier config ARCH_ACORN bool diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 96b9425219d..be70fe56bbe 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -132,6 +132,23 @@ choice their output to UART1 serial port on DaVinci TNETV107X devices. + config DEBUG_ZYNQ_UART0 + bool "Kernel low-level debugging on Xilinx Zynq using UART0" + depends on ARCH_ZYNQ + help + Say Y here if you want the debug print routines to direct + their output to UART0 on the Zynq platform. + + config DEBUG_ZYNQ_UART1 + bool "Kernel low-level debugging on Xilinx Zynq using UART1" + depends on ARCH_ZYNQ + help + Say Y here if you want the debug print routines to direct + their output to UART1 on the Zynq platform. + + If you have a ZC702 board and want early boot messages to + appear on the USB serial adaptor, select this option. + config DEBUG_DC21285_PORT bool "Kernel low-level debugging messages via footbridge serial port" depends on FOOTBRIDGE @@ -456,6 +473,7 @@ config DEBUG_LL_INCLUDE default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \ DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1 default "debug/tegra.S" if DEBUG_TEGRA_UART + default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1 default "mach/debug-macro.S" config EARLY_PRINTK diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 89087d599ad..aa90b667079 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -199,7 +199,6 @@ machine-$(CONFIG_ARCH_ZYNQ) += zynq plat-$(CONFIG_ARCH_MXC) += mxc plat-$(CONFIG_ARCH_OMAP) += omap plat-$(CONFIG_ARCH_S3C64XX) += samsung -plat-$(CONFIG_ARCH_ZYNQ) += versatile plat-$(CONFIG_PLAT_IOP) += iop plat-$(CONFIG_PLAT_ORION) += orion plat-$(CONFIG_PLAT_PXA) += pxa diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index f37cf9fa5fa..76ed11e68f7 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -103,5 +103,6 @@ dtb-$(CONFIG_ARCH_VEXPRESS) += vexpress-v2p-ca5s.dtb \ dtb-$(CONFIG_ARCH_VT8500) += vt8500-bv07.dtb \ wm8505-ref.dtb \ wm8650-mid.dtb +dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb endif diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi new file mode 100644 index 00000000000..401c1262d4e --- /dev/null +++ b/arch/arm/boot/dts/zynq-7000.dtsi @@ -0,0 +1,166 @@ +/* + * 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/ "skeleton.dtsi" + +/ { + compatible = "xlnx,zynq-7000"; + + amba { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + interrupt-parent = <&intc>; + ranges; + + intc: interrupt-controller@f8f01000 { + compatible = "arm,cortex-a9-gic"; + #interrupt-cells = <3>; + #address-cells = <1>; + interrupt-controller; + reg = <0xF8F01000 0x1000>, + <0xF8F00100 0x100>; + }; + + L2: cache-controller { + compatible = "arm,pl310-cache"; + reg = <0xF8F02000 0x1000>; + arm,data-latency = <2 3 2>; + arm,tag-latency = <2 3 2>; + cache-unified; + cache-level = <2>; + }; + + uart0: uart@e0000000 { + compatible = "xlnx,xuartps"; + reg = <0xE0000000 0x1000>; + interrupts = <0 27 4>; + clock = <50000000>; + }; + + uart1: uart@e0001000 { + compatible = "xlnx,xuartps"; + reg = <0xE0001000 0x1000>; + interrupts = <0 50 4>; + clock = <50000000>; + }; + + slcr: slcr@f8000000 { + compatible = "xlnx,zynq-slcr"; + reg = <0xF8000000 0x1000>; + + clocks { + #address-cells = <1>; + #size-cells = <0>; + + ps_clk: ps_clk { + #clock-cells = <0>; + compatible = "fixed-clock"; + /* clock-frequency set in board-specific file */ + clock-output-names = "ps_clk"; + }; + armpll: armpll { + #clock-cells = <0>; + compatible = "xlnx,zynq-pll"; + clocks = <&ps_clk>; + reg = <0x100 0x110>; + clock-output-names = "armpll"; + }; + ddrpll: ddrpll { + #clock-cells = <0>; + compatible = "xlnx,zynq-pll"; + clocks = <&ps_clk>; + reg = <0x104 0x114>; + clock-output-names = "ddrpll"; + }; + iopll: iopll { + #clock-cells = <0>; + compatible = "xlnx,zynq-pll"; + clocks = <&ps_clk>; + reg = <0x108 0x118>; + clock-output-names = "iopll"; + }; + uart_clk: uart_clk { + #clock-cells = <1>; + compatible = "xlnx,zynq-periph-clock"; + clocks = <&iopll &armpll &ddrpll>; + reg = <0x154>; + clock-output-names = "uart0_ref_clk", + "uart1_ref_clk"; + }; + cpu_clk: cpu_clk { + #clock-cells = <1>; + compatible = "xlnx,zynq-cpu-clock"; + clocks = <&iopll &armpll &ddrpll>; + reg = <0x120 0x1C4>; + clock-output-names = "cpu_6x4x", + "cpu_3x2x", + "cpu_2x", + "cpu_1x"; + }; + }; + }; + + ttc0: ttc0@f8001000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "xlnx,ttc"; + reg = <0xF8001000 0x1000>; + clocks = <&cpu_clk 3>; + clock-names = "cpu_1x"; + clock-ranges; + + ttc0_0: ttc0.0 { + status = "disabled"; + reg = <0>; + interrupts = <0 10 4>; + }; + ttc0_1: ttc0.1 { + status = "disabled"; + reg = <1>; + interrupts = <0 11 4>; + }; + ttc0_2: ttc0.2 { + status = "disabled"; + reg = <2>; + interrupts = <0 12 4>; + }; + }; + + ttc1: ttc1@f8002000 { + #interrupt-parent = <&intc>; + #address-cells = <1>; + #size-cells = <0>; + compatible = "xlnx,ttc"; + reg = <0xF8002000 0x1000>; + clocks = <&cpu_clk 3>; + clock-names = "cpu_1x"; + clock-ranges; + + ttc1_0: ttc1.0 { + status = "disabled"; + reg = <0>; + interrupts = <0 37 4>; + }; + ttc1_1: ttc1.1 { + status = "disabled"; + reg = <1>; + interrupts = <0 38 4>; + }; + ttc1_2: ttc1.2 { + status = "disabled"; + reg = <2>; + interrupts = <0 39 4>; + }; + }; + }; +}; diff --git a/arch/arm/boot/dts/zynq-ep107.dts b/arch/arm/boot/dts/zynq-ep107.dts deleted file mode 100644 index 37ca192fb19..00000000000 --- a/arch/arm/boot/dts/zynq-ep107.dts +++ /dev/null @@ -1,52 +0,0 @@ -/* - * 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. - */ - -/dts-v1/; -/ { - model = "Xilinx Zynq EP107"; - compatible = "xlnx,zynq-ep107"; - #address-cells = <1>; - #size-cells = <1>; - interrupt-parent = <&intc>; - - memory { - device_type = "memory"; - reg = <0x0 0x10000000>; - }; - - chosen { - bootargs = "console=ttyPS0,9600 root=/dev/ram rw initrd=0x800000,8M earlyprintk"; - linux,stdout-path = &uart0; - }; - - amba { - compatible = "simple-bus"; - #address-cells = <1>; - #size-cells = <1>; - ranges; - - intc: interrupt-controller@f8f01000 { - interrupt-controller; - compatible = "arm,gic"; - reg = <0xF8F01000 0x1000>; - #interrupt-cells = <2>; - }; - - uart0: uart@e0000000 { - compatible = "xlnx,xuartps"; - reg = <0xE0000000 0x1000>; - interrupts = <59 0>; - clock = <50000000>; - }; - }; -}; diff --git a/arch/arm/boot/dts/zynq-zc702.dts b/arch/arm/boot/dts/zynq-zc702.dts new file mode 100644 index 00000000000..c772942a399 --- /dev/null +++ b/arch/arm/boot/dts/zynq-zc702.dts @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2011 Xilinx + * Copyright (C) 2012 National Instruments Corp. + * + * 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. + */ +/dts-v1/; +/include/ "zynq-7000.dtsi" + +/ { + model = "Zynq ZC702 Development Board"; + compatible = "xlnx,zynq-zc702", "xlnx,zynq-7000"; + + memory { + device_type = "memory"; + reg = <0x0 0x40000000>; + }; + + chosen { + bootargs = "console=ttyPS1,115200 earlyprintk"; + }; + +}; + +&ps_clk { + clock-frequency = <33333330>; +}; + +&ttc0_0 { + status = "ok"; + compatible = "xlnx,ttc-counter-clocksource"; +}; + +&ttc0_1 { + status = "ok"; + compatible = "xlnx,ttc-counter-clockevent"; +}; diff --git a/arch/arm/mach-zynq/include/mach/debug-macro.S b/arch/arm/include/debug/zynq.S index 3ab0be1f619..f9aa9740a73 100644 --- a/arch/arm/mach-zynq/include/mach/debug-macro.S +++ b/arch/arm/include/debug/zynq.S @@ -1,5 +1,4 @@ -/* arch/arm/mach-zynq/include/mach/debug-macro.S - * +/* * Debugging macro include header * * Copyright (C) 2011 Xilinx @@ -13,9 +12,25 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ +#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 */ + +#define UART0_PHYS 0xE0000000 +#define UART1_PHYS 0xE0001000 +#define UART_SIZE SZ_4K +#define UART_VIRT 0xF0001000 + +#if IS_ENABLED(CONFIG_DEBUG_ZYNQ_UART1) +# define LL_UART_PADDR UART1_PHYS +#else +# define LL_UART_PADDR UART0_PHYS +#endif -#include <mach/zynq_soc.h> -#include <mach/uart.h> +#define LL_UART_VADDR UART_VIRT .macro addruart, rp, rv, tmp ldr \rp, =LL_UART_PADDR @ physical diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig new file mode 100644 index 00000000000..adb6c0ea0e5 --- /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 ab5cfddc0d7..e16d4bed0f7 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 a009644a155..954b91c13c9 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 c6e73d81a45..00000000000 --- 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/hardware.h b/arch/arm/mach-zynq/include/mach/hardware.h deleted file mode 100644 index d558d8a94be..00000000000 --- 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 5fb04fd3bac..00000000000 --- 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 6c0245e42a5..00000000000 --- 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 5c47c97156f..00000000000 --- 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 af4e8447bfa..00000000000 --- 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 d0d3f8fb06d..00000000000 --- 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 c2c96cc7d6e..de3df283da7 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, -}; diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 71a25b91de0..d35a34c5836 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -19,6 +19,7 @@ endif obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o obj-$(CONFIG_ARCH_U8500) += ux500/ obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o +obj-$(CONFIG_ARCH_ZYNQ) += clk-zynq.o # Chip specific obj-$(CONFIG_COMMON_CLK_WM831X) += clk-wm831x.o diff --git a/drivers/clk/clk-zynq.c b/drivers/clk/clk-zynq.c new file mode 100644 index 00000000000..37a30514fd6 --- /dev/null +++ b/drivers/clk/clk-zynq.c @@ -0,0 +1,383 @@ +/* + * Copyright (c) 2012 National Instruments + * + * Josh Cartwright <josh.cartwright@ni.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <linux/io.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/clk-provider.h> + +static void __iomem *slcr_base; + +struct zynq_pll_clk { + struct clk_hw hw; + void __iomem *pll_ctrl; + void __iomem *pll_cfg; +}; + +#define to_zynq_pll_clk(hw) container_of(hw, struct zynq_pll_clk, hw) + +#define CTRL_PLL_FDIV(x) ((x) >> 12) + +static unsigned long zynq_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct zynq_pll_clk *pll = to_zynq_pll_clk(hw); + return parent_rate * CTRL_PLL_FDIV(ioread32(pll->pll_ctrl)); +} + +static const struct clk_ops zynq_pll_clk_ops = { + .recalc_rate = zynq_pll_recalc_rate, +}; + +static void __init zynq_pll_clk_setup(struct device_node *np) +{ + struct clk_init_data init; + struct zynq_pll_clk *pll; + const char *parent_name; + struct clk *clk; + u32 regs[2]; + int ret; + + ret = of_property_read_u32_array(np, "reg", regs, ARRAY_SIZE(regs)); + if (WARN_ON(ret)) + return; + + pll = kzalloc(sizeof(*pll), GFP_KERNEL); + if (WARN_ON(!pll)) + return; + + pll->pll_ctrl = slcr_base + regs[0]; + pll->pll_cfg = slcr_base + regs[1]; + + of_property_read_string(np, "clock-output-names", &init.name); + + init.ops = &zynq_pll_clk_ops; + parent_name = of_clk_get_parent_name(np, 0); + init.parent_names = &parent_name; + init.num_parents = 1; + + pll->hw.init = &init; + + clk = clk_register(NULL, &pll->hw); + if (WARN_ON(IS_ERR(clk))) + return; + + ret = of_clk_add_provider(np, of_clk_src_simple_get, clk); + if (WARN_ON(ret)) + return; +} + +struct zynq_periph_clk { + struct clk_hw hw; + struct clk_onecell_data onecell_data; + struct clk *gates[2]; + void __iomem *clk_ctrl; + spinlock_t clkact_lock; +}; + +#define to_zynq_periph_clk(hw) container_of(hw, struct zynq_periph_clk, hw) + +static const u8 periph_clk_parent_map[] = { + 0, 0, 1, 2 +}; +#define PERIPH_CLK_CTRL_SRC(x) (periph_clk_parent_map[((x) & 0x30) >> 4]) +#define PERIPH_CLK_CTRL_DIV(x) (((x) & 0x3F00) >> 8) + +static unsigned long zynq_periph_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct zynq_periph_clk *periph = to_zynq_periph_clk(hw); + return parent_rate / PERIPH_CLK_CTRL_DIV(ioread32(periph->clk_ctrl)); +} + +static u8 zynq_periph_get_parent(struct clk_hw *hw) +{ + struct zynq_periph_clk *periph = to_zynq_periph_clk(hw); + return PERIPH_CLK_CTRL_SRC(ioread32(periph->clk_ctrl)); +} + +static const struct clk_ops zynq_periph_clk_ops = { + .recalc_rate = zynq_periph_recalc_rate, + .get_parent = zynq_periph_get_parent, +}; + +static void __init zynq_periph_clk_setup(struct device_node *np) +{ + struct zynq_periph_clk *periph; + const char *parent_names[3]; + struct clk_init_data init; + int clk_num = 0, err; + const char *name; + struct clk *clk; + u32 reg; + int i; + + err = of_property_read_u32(np, "reg", ®); + if (WARN_ON(err)) + return; + + periph = kzalloc(sizeof(*periph), GFP_KERNEL); + if (WARN_ON(!periph)) + return; + + periph->clk_ctrl = slcr_base + reg; + spin_lock_init(&periph->clkact_lock); + + init.name = np->name; + init.ops = &zynq_periph_clk_ops; + for (i = 0; i < ARRAY_SIZE(parent_names); i++) + parent_names[i] = of_clk_get_parent_name(np, i); + init.parent_names = parent_names; + init.num_parents = ARRAY_SIZE(parent_names); + + periph->hw.init = &init; + + clk = clk_register(NULL, &periph->hw); + if (WARN_ON(IS_ERR(clk))) + return; + + err = of_clk_add_provider(np, of_clk_src_simple_get, clk); + if (WARN_ON(err)) + return; + + err = of_property_read_string_index(np, "clock-output-names", 0, + &name); + if (WARN_ON(err)) + return; + + periph->gates[0] = clk_register_gate(NULL, name, np->name, 0, + periph->clk_ctrl, 0, 0, + &periph->clkact_lock); + if (WARN_ON(IS_ERR(periph->gates[0]))) + return; + clk_num++; + + /* some periph clks have 2 downstream gates */ + err = of_property_read_string_index(np, "clock-output-names", 1, + &name); + if (err != -ENODATA) { + periph->gates[1] = clk_register_gate(NULL, name, np->name, 0, + periph->clk_ctrl, 1, 0, + &periph->clkact_lock); + if (WARN_ON(IS_ERR(periph->gates[1]))) + return; + clk_num++; + } + + periph->onecell_data.clks = periph->gates; + periph->onecell_data.clk_num = clk_num; + + err = of_clk_add_provider(np, of_clk_src_onecell_get, + &periph->onecell_data); + if (WARN_ON(err)) + return; +} + +/* CPU Clock domain is modelled as a mux with 4 children subclks, whose + * derivative rates depend on CLK_621_TRUE + */ + +struct zynq_cpu_clk { + struct clk_hw hw; + struct clk_onecell_data onecell_data; + struct clk *subclks[4]; + void __iomem *clk_ctrl; + spinlock_t clkact_lock; +}; + +#define to_zynq_cpu_clk(hw) container_of(hw, struct zynq_cpu_clk, hw) + +static const u8 zynq_cpu_clk_parent_map[] = { + 1, 1, 2, 0 +}; +#define CPU_CLK_SRCSEL(x) (zynq_cpu_clk_parent_map[(((x) & 0x30) >> 4)]) +#define CPU_CLK_CTRL_DIV(x) (((x) & 0x3F00) >> 8) + +static u8 zynq_cpu_clk_get_parent(struct clk_hw *hw) +{ + struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw); + return CPU_CLK_SRCSEL(ioread32(cpuclk->clk_ctrl)); +} + +static unsigned long zynq_cpu_clk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct zynq_cpu_clk *cpuclk = to_zynq_cpu_clk(hw); + return parent_rate / CPU_CLK_CTRL_DIV(ioread32(cpuclk->clk_ctrl)); +} + +static const struct clk_ops zynq_cpu_clk_ops = { + .get_parent = zynq_cpu_clk_get_parent, + .recalc_rate = zynq_cpu_clk_recalc_rate, +}; + +struct zynq_cpu_subclk { + struct clk_hw hw; + void __iomem *clk_621; + enum { + CPU_SUBCLK_6X4X, + CPU_SUBCLK_3X2X, + CPU_SUBCLK_2X, + CPU_SUBCLK_1X, + } which; +}; + +#define CLK_621_TRUE(x) ((x) & 1) + +#define to_zynq_cpu_subclk(hw) container_of(hw, struct zynq_cpu_subclk, hw); + +static unsigned long zynq_cpu_subclk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long uninitialized_var(rate); + struct zynq_cpu_subclk *subclk; + bool is_621; + + subclk = to_zynq_cpu_subclk(hw) + is_621 = CLK_621_TRUE(ioread32(subclk->clk_621)); + + switch (subclk->which) { + case CPU_SUBCLK_6X4X: + rate = parent_rate; + break; + case CPU_SUBCLK_3X2X: + rate = parent_rate / 2; + break; + case CPU_SUBCLK_2X: + rate = parent_rate / (is_621 ? 3 : 2); + break; + case CPU_SUBCLK_1X: + rate = parent_rate / (is_621 ? 6 : 4); + break; + }; + + return rate; +} + +static const struct clk_ops zynq_cpu_subclk_ops = { + .recalc_rate = zynq_cpu_subclk_recalc_rate, +}; + +static struct clk *zynq_cpu_subclk_setup(struct device_node *np, u8 which, + void __iomem *clk_621) +{ + struct zynq_cpu_subclk *subclk; + struct clk_init_data init; + struct clk *clk; + int err; + + err = of_property_read_string_index(np, "clock-output-names", + which, &init.name); + if (WARN_ON(err)) + goto err_read_output_name; + + subclk = kzalloc(sizeof(*subclk), GFP_KERNEL); + if (!subclk) + goto err_subclk_alloc; + + subclk->clk_621 = clk_621; + subclk->which = which; + + init.ops = &zynq_cpu_subclk_ops; + init.parent_names = &np->name; + init.num_parents = 1; + + subclk->hw.init = &init; + + clk = clk_register(NULL, &subclk->hw); + if (WARN_ON(IS_ERR(clk))) + goto err_clk_register; + + return clk; + +err_clk_register: + kfree(subclk); +err_subclk_alloc: +err_read_output_name: + return ERR_PTR(-EINVAL); +} + +static void __init zynq_cpu_clk_setup(struct device_node *np) +{ + struct zynq_cpu_clk *cpuclk; + const char *parent_names[3]; + struct clk_init_data init; + void __iomem *clk_621; + struct clk *clk; + u32 reg[2]; + int err; + int i; + + err = of_property_read_u32_array(np, "reg", reg, ARRAY_SIZE(reg)); + if (WARN_ON(err)) + return; + + cpuclk = kzalloc(sizeof(*cpuclk), GFP_KERNEL); + if (WARN_ON(!cpuclk)) + return; + + cpuclk->clk_ctrl = slcr_base + reg[0]; + clk_621 = slcr_base + reg[1]; + spin_lock_init(&cpuclk->clkact_lock); + + init.name = np->name; + init.ops = &zynq_cpu_clk_ops; + for (i = 0; i < ARRAY_SIZE(parent_names); i++) + parent_names[i] = of_clk_get_parent_name(np, i); + init.parent_names = parent_names; + init.num_parents = ARRAY_SIZE(parent_names); + + cpuclk->hw.init = &init; + + clk = clk_register(NULL, &cpuclk->hw); + if (WARN_ON(IS_ERR(clk))) + return; + + err = of_clk_add_provider(np, of_clk_src_simple_get, clk); + if (WARN_ON(err)) + return; + + for (i = 0; i < 4; i++) { + cpuclk->subclks[i] = zynq_cpu_subclk_setup(np, i, clk_621); + if (WARN_ON(IS_ERR(cpuclk->subclks[i]))) + return; + } + + cpuclk->onecell_data.clks = cpuclk->subclks; + cpuclk->onecell_data.clk_num = i; + + err = of_clk_add_provider(np, of_clk_src_onecell_get, + &cpuclk->onecell_data); + if (WARN_ON(err)) + return; +} + +static const __initconst struct of_device_id zynq_clk_match[] = { + { .compatible = "fixed-clock", .data = of_fixed_clk_setup, }, + { .compatible = "xlnx,zynq-pll", .data = zynq_pll_clk_setup, }, + { .compatible = "xlnx,zynq-periph-clock", + .data = zynq_periph_clk_setup, }, + { .compatible = "xlnx,zynq-cpu-clock", .data = zynq_cpu_clk_setup, }, + {} +}; + +void __init xilinx_zynq_clocks_init(void __iomem *slcr) +{ + slcr_base = slcr; + of_clk_init(zynq_clk_match); +} diff --git a/include/linux/clk/zynq.h b/include/linux/clk/zynq.h new file mode 100644 index 00000000000..56be7cd9aa8 --- /dev/null +++ b/include/linux/clk/zynq.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2012 National Instruments + * + * 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 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. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __LINUX_CLK_ZYNQ_H_ +#define __LINUX_CLK_ZYNQ_H_ + +void __init xilinx_zynq_clocks_init(void __iomem *slcr); + +#endif |