diff options
Diffstat (limited to 'arch/arm/mach-spear')
27 files changed, 2993 insertions, 0 deletions
diff --git a/arch/arm/mach-spear/Kconfig b/arch/arm/mach-spear/Kconfig new file mode 100644 index 00000000000..e288df90c74 --- /dev/null +++ b/arch/arm/mach-spear/Kconfig @@ -0,0 +1,90 @@ +# +# SPEAr Platform configuration file +# + +if PLAT_SPEAR + +choice + prompt "ST SPEAr Family" + default ARCH_SPEAR3XX + +config ARCH_SPEAR13XX + bool "ST SPEAr13xx with Device Tree" + select ARCH_HAVE_CPUFREQ + select ARM_GIC + select CPU_V7 + select GPIO_SPEAR_SPICS + select HAVE_SMP + select MIGHT_HAVE_CACHE_L2X0 + select PINCTRL + select USE_OF + help + Supports for ARM's SPEAR13XX family + +config ARCH_SPEAR3XX + bool "ST SPEAr3xx with Device Tree" + select ARM_VIC + select CPU_ARM926T + select PINCTRL + select USE_OF + help + Supports for ARM's SPEAR3XX family + +config ARCH_SPEAR6XX + bool "SPEAr6XX" + select ARM_VIC + select CPU_ARM926T + help + Supports for ARM's SPEAR6XX family + +endchoice + +if ARCH_SPEAR13XX + +menu "SPEAr13xx Implementations" +config MACH_SPEAR1310 + bool "SPEAr1310 Machine support with Device Tree" + select PINCTRL_SPEAR1310 + help + Supports ST SPEAr1310 machine configured via the device-tree + +config MACH_SPEAR1340 + bool "SPEAr1340 Machine support with Device Tree" + select PINCTRL_SPEAR1340 + help + Supports ST SPEAr1340 machine configured via the device-tree +endmenu +endif #ARCH_SPEAR13XX + +if ARCH_SPEAR3XX + +menu "SPEAr3xx Implementations" +config MACH_SPEAR300 + bool "SPEAr300 Machine support with Device Tree" + select PINCTRL_SPEAR300 + help + Supports ST SPEAr300 machine configured via the device-tree + +config MACH_SPEAR310 + bool "SPEAr310 Machine support with Device Tree" + select PINCTRL_SPEAR310 + help + Supports ST SPEAr310 machine configured via the device-tree + +config MACH_SPEAR320 + bool "SPEAr320 Machine support with Device Tree" + select PINCTRL_SPEAR320 + help + Supports ST SPEAr320 machine configured via the device-tree +endmenu + +endif + +config MACH_SPEAR600 + def_bool y + depends on ARCH_SPEAR6XX + select USE_OF + help + Supports ST SPEAr600 boards configured via the device-treesource "arch/arm/mach-spear6xx/Kconfig" + +endif diff --git a/arch/arm/mach-spear/Makefile b/arch/arm/mach-spear/Makefile new file mode 100644 index 00000000000..8a937bff9d8 --- /dev/null +++ b/arch/arm/mach-spear/Makefile @@ -0,0 +1,22 @@ +# +# SPEAr Platform specific Makefile +# + +# Common support +obj-y := restart.o time.o + +obj-$(CONFIG_SMP) += headsmp.o platsmp.o +obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o + +obj-$(CONFIG_ARCH_SPEAR13XX) += spear13xx.o +obj-$(CONFIG_MACH_SPEAR1310) += spear1310.o +obj-$(CONFIG_MACH_SPEAR1340) += spear1340.o + +obj-$(CONFIG_ARCH_SPEAR3XX) += spear3xx.o +obj-$(CONFIG_ARCH_SPEAR3XX) += pl080.o +obj-$(CONFIG_MACH_SPEAR300) += spear300.o +obj-$(CONFIG_MACH_SPEAR310) += spear310.o +obj-$(CONFIG_MACH_SPEAR320) += spear320.o + +obj-$(CONFIG_ARCH_SPEAR6XX) += spear6xx.o +obj-$(CONFIG_ARCH_SPEAR6XX) += pl080.o diff --git a/arch/arm/mach-spear/Makefile.boot b/arch/arm/mach-spear/Makefile.boot new file mode 100644 index 00000000000..4674a4c221d --- /dev/null +++ b/arch/arm/mach-spear/Makefile.boot @@ -0,0 +1,3 @@ +zreladdr-y += 0x00008000 +params_phys-y := 0x00000100 +initrd_phys-y := 0x00800000 diff --git a/arch/arm/mach-spear/headsmp.S b/arch/arm/mach-spear/headsmp.S new file mode 100644 index 00000000000..ed85473a047 --- /dev/null +++ b/arch/arm/mach-spear/headsmp.S @@ -0,0 +1,47 @@ +/* + * arch/arm/mach-spear13XX/headsmp.S + * + * Picked from realview + * Copyright (c) 2012 ST Microelectronics Limited + * Shiraz Hashim <shiraz.hashim@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/linkage.h> +#include <linux/init.h> + + __INIT + +/* + * spear13xx specific entry point for secondary CPUs. This provides + * a "holding pen" into which all secondary cores are held until we're + * ready for them to initialise. + */ +ENTRY(spear13xx_secondary_startup) + mrc p15, 0, r0, c0, c0, 5 + and r0, r0, #15 + adr r4, 1f + ldmia r4, {r5, r6} + sub r4, r4, r5 + add r6, r6, r4 +pen: ldr r7, [r6] + cmp r7, r0 + bne pen + + /* re-enable coherency */ + mrc p15, 0, r0, c1, c0, 1 + orr r0, r0, #(1 << 6) | (1 << 0) + mcr p15, 0, r0, c1, c0, 1 + /* + * we've been released from the holding pen: secondary_stack + * should now contain the SVC stack for this core + */ + b secondary_startup + + .align +1: .long . + .long pen_release +ENDPROC(spear13xx_secondary_startup) diff --git a/arch/arm/mach-spear/hotplug.c b/arch/arm/mach-spear/hotplug.c new file mode 100644 index 00000000000..a7d2dd11a4f --- /dev/null +++ b/arch/arm/mach-spear/hotplug.c @@ -0,0 +1,103 @@ +/* + * linux/arch/arm/mach-spear13xx/hotplug.c + * + * Copyright (C) 2012 ST Microelectronics Ltd. + * Deepak Sikri <deepak.sikri@st.com> + * + * based upon linux/arch/arm/mach-realview/hotplug.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/smp.h> +#include <asm/cacheflush.h> +#include <asm/cp15.h> +#include <asm/smp_plat.h> + +static inline void cpu_enter_lowpower(void) +{ + unsigned int v; + + flush_cache_all(); + asm volatile( + " mcr p15, 0, %1, c7, c5, 0\n" + " dsb\n" + /* + * Turn off coherency + */ + " mrc p15, 0, %0, c1, c0, 1\n" + " bic %0, %0, #0x20\n" + " mcr p15, 0, %0, c1, c0, 1\n" + " mrc p15, 0, %0, c1, c0, 0\n" + " bic %0, %0, %2\n" + " mcr p15, 0, %0, c1, c0, 0\n" + : "=&r" (v) + : "r" (0), "Ir" (CR_C) + : "cc", "memory"); +} + +static inline void cpu_leave_lowpower(void) +{ + unsigned int v; + + asm volatile("mrc p15, 0, %0, c1, c0, 0\n" + " orr %0, %0, %1\n" + " mcr p15, 0, %0, c1, c0, 0\n" + " mrc p15, 0, %0, c1, c0, 1\n" + " orr %0, %0, #0x20\n" + " mcr p15, 0, %0, c1, c0, 1\n" + : "=&r" (v) + : "Ir" (CR_C) + : "cc"); +} + +static inline void spear13xx_do_lowpower(unsigned int cpu, int *spurious) +{ + for (;;) { + wfi(); + + if (pen_release == cpu) { + /* + * OK, proper wakeup, we're done + */ + break; + } + + /* + * Getting here, means that we have come out of WFI without + * having been woken up - this shouldn't happen + * + * Just note it happening - when we're woken, we can report + * its occurrence. + */ + (*spurious)++; + } +} + +/* + * platform-specific code to shutdown a CPU + * + * Called with IRQs disabled + */ +void __ref spear13xx_cpu_die(unsigned int cpu) +{ + int spurious = 0; + + /* + * we're ready for shutdown now, so do it + */ + cpu_enter_lowpower(); + spear13xx_do_lowpower(cpu, &spurious); + + /* + * bring this CPU back into the world of cache + * coherency, and then restore interrupts + */ + cpu_leave_lowpower(); + + if (spurious) + pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious); +} diff --git a/arch/arm/mach-spear/include/mach/debug-macro.S b/arch/arm/mach-spear/include/mach/debug-macro.S new file mode 100644 index 00000000000..75b05ad0fba --- /dev/null +++ b/arch/arm/mach-spear/include/mach/debug-macro.S @@ -0,0 +1,36 @@ +/* + * arch/arm/plat-spear/include/plat/debug-macro.S + * + * Debugging macro include header for spear platform + * + * Copyright (C) 2009 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/amba/serial.h> +#include <mach/spear.h> + + .macro addruart, rp, rv, tmp + mov \rp, #SPEAR_DBG_UART_BASE @ Physical base + mov \rv, #VA_SPEAR_DBG_UART_BASE @ Virtual base + .endm + + .macro senduart, rd, rx + strb \rd, [\rx, #UART01x_DR] @ ASC_TX_BUFFER + .endm + + .macro waituart, rd, rx +1001: ldr \rd, [\rx, #UART01x_FR] @ FLAG REGISTER + tst \rd, #UART01x_FR_TXFF @ TX_FULL + bne 1001b + .endm + + .macro busyuart, rd, rx +1002: ldr \rd, [\rx, #UART01x_FR] @ FLAG REGISTER + tst \rd, #UART011_FR_TXFE @ TX_EMPTY + beq 1002b + .endm diff --git a/arch/arm/mach-spear/include/mach/generic.h b/arch/arm/mach-spear/include/mach/generic.h new file mode 100644 index 00000000000..af47d9b0d83 --- /dev/null +++ b/arch/arm/mach-spear/include/mach/generic.h @@ -0,0 +1,58 @@ +/* + * spear machine family generic header file + * + * Copyright (C) 2009-2012 ST Microelectronics + * Rajeev Kumar <rajeev-dlh.kumar@st.com> + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __MACH_GENERIC_H +#define __MACH_GENERIC_H + +#include <linux/dmaengine.h> +#include <linux/amba/pl08x.h> +#include <linux/init.h> +#include <asm/mach/time.h> + +extern void spear13xx_timer_init(void); +extern void spear3xx_timer_init(void); +extern struct pl022_ssp_controller pl022_plat_data; +extern struct pl08x_platform_data pl080_plat_data; +extern struct dw_dma_platform_data dmac_plat_data; +extern struct dw_dma_slave cf_dma_priv; +extern struct dw_dma_slave nand_read_dma_priv; +extern struct dw_dma_slave nand_write_dma_priv; +bool dw_dma_filter(struct dma_chan *chan, void *slave); + +void __init spear_setup_of_timer(void); +void __init spear3xx_clk_init(void); +void __init spear3xx_map_io(void); +void __init spear3xx_dt_init_irq(void); +void __init spear6xx_clk_init(void); +void __init spear13xx_map_io(void); +void __init spear13xx_l2x0_init(void); + +void spear_restart(char, const char *); + +void spear13xx_secondary_startup(void); +void __cpuinit spear13xx_cpu_die(unsigned int cpu); + +extern struct smp_operations spear13xx_smp_ops; + +#ifdef CONFIG_MACH_SPEAR1310 +void __init spear1310_clk_init(void); +#else +static inline void spear1310_clk_init(void) {} +#endif + +#ifdef CONFIG_MACH_SPEAR1340 +void __init spear1340_clk_init(void); +#else +static inline void spear1340_clk_init(void) {} +#endif + +#endif /* __MACH_GENERIC_H */ diff --git a/arch/arm/mach-spear/include/mach/hardware.h b/arch/arm/mach-spear/include/mach/hardware.h new file mode 100644 index 00000000000..40a8c178f10 --- /dev/null +++ b/arch/arm/mach-spear/include/mach/hardware.h @@ -0,0 +1 @@ +/* empty */ diff --git a/arch/arm/mach-spear/include/mach/irqs.h b/arch/arm/mach-spear/include/mach/irqs.h new file mode 100644 index 00000000000..92da0a8c6bc --- /dev/null +++ b/arch/arm/mach-spear/include/mach/irqs.h @@ -0,0 +1,35 @@ +/* + * IRQ helper macros for spear machine family + * + * Copyright (C) 2009-2012 ST Microelectronics + * Rajeev Kumar <rajeev-dlh.kumar@st.com> + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __MACH_IRQS_H +#define __MACH_IRQS_H + +#ifdef CONFIG_ARCH_SPEAR3XX +#define NR_IRQS 256 +#endif + +#ifdef CONFIG_ARCH_SPEAR6XX +/* IRQ definitions */ +/* VIC 1 */ +#define IRQ_VIC_END 64 + +/* GPIO pins virtual irqs */ +#define VIRTUAL_IRQS 24 +#define NR_IRQS (IRQ_VIC_END + VIRTUAL_IRQS) +#endif + +#ifdef CONFIG_ARCH_SPEAR13XX +#define IRQ_GIC_END 160 +#define NR_IRQS IRQ_GIC_END +#endif + +#endif /* __MACH_IRQS_H */ diff --git a/arch/arm/mach-spear/include/mach/misc_regs.h b/arch/arm/mach-spear/include/mach/misc_regs.h new file mode 100644 index 00000000000..075812c4ca1 --- /dev/null +++ b/arch/arm/mach-spear/include/mach/misc_regs.h @@ -0,0 +1,22 @@ +/* + * arch/arm/mach-spear3xx/include/mach/misc_regs.h + * + * Miscellaneous registers definitions for SPEAr3xx machine family + * + * Copyright (C) 2009 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __MACH_MISC_REGS_H +#define __MACH_MISC_REGS_H + +#include <mach/spear.h> + +#define MISC_BASE IOMEM(VA_SPEAR_ICM3_MISC_REG_BASE) +#define DMA_CHN_CFG (MISC_BASE + 0x0A0) + +#endif /* __MACH_MISC_REGS_H */ diff --git a/arch/arm/mach-spear/include/mach/spear.h b/arch/arm/mach-spear/include/mach/spear.h new file mode 100644 index 00000000000..2198ab96df9 --- /dev/null +++ b/arch/arm/mach-spear/include/mach/spear.h @@ -0,0 +1,101 @@ +/* + * SPEAr3xx/6xx Machine family specific definition + * + * Copyright (C) 2009,2012 ST Microelectronics + * Rajeev Kumar<rajeev-dlh.kumar@st.com> + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __MACH_SPEAR_H +#define __MACH_SPEAR_H + +#include <asm/memory.h> + +#if defined(CONFIG_ARCH_SPEAR3XX) || defined (CONFIG_ARCH_SPEAR6XX) + +/* ICM1 - Low speed connection */ +#define SPEAR_ICM1_2_BASE UL(0xD0000000) +#define VA_SPEAR_ICM1_2_BASE UL(0xFD000000) +#define SPEAR_ICM1_UART_BASE UL(0xD0000000) +#define VA_SPEAR_ICM1_UART_BASE (VA_SPEAR_ICM1_2_BASE | SPEAR_ICM1_UART_BASE) +#define SPEAR3XX_ICM1_SSP_BASE UL(0xD0100000) + +/* ML-1, 2 - Multi Layer CPU Subsystem */ +#define SPEAR_ICM3_ML1_2_BASE UL(0xF0000000) +#define VA_SPEAR6XX_ML_CPU_BASE UL(0xF0000000) + +/* ICM3 - Basic Subsystem */ +#define SPEAR_ICM3_SMI_CTRL_BASE UL(0xFC000000) +#define VA_SPEAR_ICM3_SMI_CTRL_BASE UL(0xFC000000) +#define SPEAR_ICM3_DMA_BASE UL(0xFC400000) +#define SPEAR_ICM3_SYS_CTRL_BASE UL(0xFCA00000) +#define VA_SPEAR_ICM3_SYS_CTRL_BASE (VA_SPEAR_ICM3_SMI_CTRL_BASE | SPEAR_ICM3_SYS_CTRL_BASE) +#define SPEAR_ICM3_MISC_REG_BASE UL(0xFCA80000) +#define VA_SPEAR_ICM3_MISC_REG_BASE (VA_SPEAR_ICM3_SMI_CTRL_BASE | SPEAR_ICM3_MISC_REG_BASE) + +/* Debug uart for linux, will be used for debug and uncompress messages */ +#define SPEAR_DBG_UART_BASE SPEAR_ICM1_UART_BASE +#define VA_SPEAR_DBG_UART_BASE VA_SPEAR_ICM1_UART_BASE + +/* Sysctl base for spear platform */ +#define SPEAR_SYS_CTRL_BASE SPEAR_ICM3_SYS_CTRL_BASE +#define VA_SPEAR_SYS_CTRL_BASE VA_SPEAR_ICM3_SYS_CTRL_BASE + +/* SPEAr320 Macros */ +#define SPEAR320_SOC_CONFIG_BASE UL(0xB3000000) +#define VA_SPEAR320_SOC_CONFIG_BASE UL(0xFE000000) +#define SPEAR320_CONTROL_REG IOMEM(VA_SPEAR320_SOC_CONFIG_BASE) +#define SPEAR320_EXT_CTRL_REG IOMEM(VA_SPEAR320_SOC_CONFIG_BASE + 0x0018) + #define SPEAR320_UARTX_PCLK_MASK 0x1 + #define SPEAR320_UART2_PCLK_SHIFT 8 + #define SPEAR320_UART3_PCLK_SHIFT 9 + #define SPEAR320_UART4_PCLK_SHIFT 10 + #define SPEAR320_UART5_PCLK_SHIFT 11 + #define SPEAR320_UART6_PCLK_SHIFT 12 + #define SPEAR320_RS485_PCLK_SHIFT 13 +#endif /* SPEAR3xx || SPEAR6XX */ + +#ifdef CONFIG_ARCH_SPEAR13XX + +#define PERIP_GRP2_BASE UL(0xB3000000) +#define VA_PERIP_GRP2_BASE IOMEM(0xFE000000) +#define MCIF_SDHCI_BASE UL(0xB3000000) +#define SYSRAM0_BASE UL(0xB3800000) +#define VA_SYSRAM0_BASE IOMEM(0xFE800000) +#define SYS_LOCATION (VA_SYSRAM0_BASE + 0x600) + +#define PERIP_GRP1_BASE UL(0xE0000000) +#define VA_PERIP_GRP1_BASE IOMEM(0xFD000000) +#define UART_BASE UL(0xE0000000) +#define VA_UART_BASE IOMEM(0xFD000000) +#define SSP_BASE UL(0xE0100000) +#define MISC_BASE UL(0xE0700000) +#define VA_MISC_BASE IOMEM(0xFD700000) + +#define A9SM_AND_MPMC_BASE UL(0xEC000000) +#define VA_A9SM_AND_MPMC_BASE IOMEM(0xFC000000) + +/* A9SM peripheral offsets */ +#define A9SM_PERIP_BASE UL(0xEC800000) +#define VA_A9SM_PERIP_BASE IOMEM(0xFC800000) +#define VA_SCU_BASE (VA_A9SM_PERIP_BASE + 0x00) + +#define L2CC_BASE UL(0xED000000) +#define VA_L2CC_BASE IOMEM(UL(0xFB000000)) + +/* others */ +#define DMAC0_BASE UL(0xEA800000) +#define DMAC1_BASE UL(0xEB000000) +#define MCIF_CF_BASE UL(0xB2800000) + +/* Debug uart for linux, will be used for debug and uncompress messages */ +#define SPEAR_DBG_UART_BASE UART_BASE +#define VA_SPEAR_DBG_UART_BASE VA_UART_BASE + +#endif /* SPEAR13XX */ + +#endif /* __MACH_SPEAR_H */ diff --git a/arch/arm/mach-spear/include/mach/timex.h b/arch/arm/mach-spear/include/mach/timex.h new file mode 100644 index 00000000000..ef95e5b780b --- /dev/null +++ b/arch/arm/mach-spear/include/mach/timex.h @@ -0,0 +1,19 @@ +/* + * arch/arm/plat-spear/include/plat/timex.h + * + * SPEAr platform specific timex definitions + * + * Copyright (C) 2009 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __PLAT_TIMEX_H +#define __PLAT_TIMEX_H + +#define CLOCK_TICK_RATE 48000000 + +#endif /* __PLAT_TIMEX_H */ diff --git a/arch/arm/mach-spear/include/mach/uncompress.h b/arch/arm/mach-spear/include/mach/uncompress.h new file mode 100644 index 00000000000..51b2dc93e4d --- /dev/null +++ b/arch/arm/mach-spear/include/mach/uncompress.h @@ -0,0 +1,42 @@ +/* + * arch/arm/plat-spear/include/plat/uncompress.h + * + * Serial port stubs for kernel decompress status messages + * + * Copyright (C) 2009 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/io.h> +#include <linux/amba/serial.h> +#include <mach/spear.h> + +#ifndef __PLAT_UNCOMPRESS_H +#define __PLAT_UNCOMPRESS_H +/* + * This does not append a newline + */ +static inline void putc(int c) +{ + void __iomem *base = (void __iomem *)SPEAR_DBG_UART_BASE; + + while (readl_relaxed(base + UART01x_FR) & UART01x_FR_TXFF) + barrier(); + + writel_relaxed(c, base + UART01x_DR); +} + +static inline void flush(void) +{ +} + +/* + * nothing to do + */ +#define arch_decomp_setup() + +#endif /* __PLAT_UNCOMPRESS_H */ diff --git a/arch/arm/mach-spear/include/plat/pl080.h b/arch/arm/mach-spear/include/plat/pl080.h new file mode 100644 index 00000000000..eb6590ded40 --- /dev/null +++ b/arch/arm/mach-spear/include/plat/pl080.h @@ -0,0 +1,21 @@ +/* + * arch/arm/plat-spear/include/plat/pl080.h + * + * DMAC pl080 definitions for SPEAr platform + * + * Copyright (C) 2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __PLAT_PL080_H +#define __PLAT_PL080_H + +struct pl08x_channel_data; +int pl080_get_signal(const struct pl08x_channel_data *cd); +void pl080_put_signal(const struct pl08x_channel_data *cd, int signal); + +#endif /* __PLAT_PL080_H */ diff --git a/arch/arm/mach-spear/pl080.c b/arch/arm/mach-spear/pl080.c new file mode 100644 index 00000000000..cfa1199d0f4 --- /dev/null +++ b/arch/arm/mach-spear/pl080.c @@ -0,0 +1,78 @@ +/* + * arch/arm/plat-spear/pl080.c + * + * DMAC pl080 definitions for SPEAr platform + * + * Copyright (C) 2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/amba/pl08x.h> +#include <linux/amba/bus.h> +#include <linux/bug.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/spinlock_types.h> +#include <mach/spear.h> +#include <mach/misc_regs.h> + +static spinlock_t lock = __SPIN_LOCK_UNLOCKED(x); + +struct { + unsigned char busy; + unsigned char val; +} signals[16] = {{0, 0}, }; + +int pl080_get_signal(const struct pl08x_channel_data *cd) +{ + unsigned int signal = cd->min_signal, val; + unsigned long flags; + + spin_lock_irqsave(&lock, flags); + + /* Return if signal is already acquired by somebody else */ + if (signals[signal].busy && + (signals[signal].val != cd->muxval)) { + spin_unlock_irqrestore(&lock, flags); + return -EBUSY; + } + + /* If acquiring for the first time, configure it */ + if (!signals[signal].busy) { + val = readl(DMA_CHN_CFG); + + /* + * Each request line has two bits in DMA_CHN_CFG register. To + * goto the bits of current request line, do left shift of + * value by 2 * signal number. + */ + val &= ~(0x3 << (signal * 2)); + val |= cd->muxval << (signal * 2); + writel(val, DMA_CHN_CFG); + } + + signals[signal].busy++; + signals[signal].val = cd->muxval; + spin_unlock_irqrestore(&lock, flags); + + return signal; +} + +void pl080_put_signal(const struct pl08x_channel_data *cd, int signal) +{ + unsigned long flags; + + spin_lock_irqsave(&lock, flags); + + /* if signal is not used */ + if (!signals[signal].busy) + BUG(); + + signals[signal].busy--; + + spin_unlock_irqrestore(&lock, flags); +} diff --git a/arch/arm/mach-spear/platsmp.c b/arch/arm/mach-spear/platsmp.c new file mode 100644 index 00000000000..af4ade61cd9 --- /dev/null +++ b/arch/arm/mach-spear/platsmp.c @@ -0,0 +1,130 @@ +/* + * arch/arm/mach-spear13xx/platsmp.c + * + * based upon linux/arch/arm/mach-realview/platsmp.c + * + * Copyright (C) 2012 ST Microelectronics Ltd. + * Shiraz Hashim <shiraz.hashim@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/delay.h> +#include <linux/jiffies.h> +#include <linux/io.h> +#include <linux/smp.h> +#include <linux/irqchip/arm-gic.h> +#include <asm/cacheflush.h> +#include <asm/smp_scu.h> +#include <mach/spear.h> +#include <mach/generic.h> + +static DEFINE_SPINLOCK(boot_lock); + +static void __iomem *scu_base = IOMEM(VA_SCU_BASE); + +static void __cpuinit spear13xx_secondary_init(unsigned int cpu) +{ + /* + * if any interrupts are already enabled for the primary + * core (e.g. timer irq), then they will not have been enabled + * for us: do so + */ + gic_secondary_init(0); + + /* + * let the primary processor know we're out of the + * pen, then head off into the C entry point + */ + pen_release = -1; + smp_wmb(); + + /* + * Synchronise with the boot thread. + */ + spin_lock(&boot_lock); + spin_unlock(&boot_lock); +} + +static int __cpuinit spear13xx_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + unsigned long timeout; + + /* + * set synchronisation state between this boot processor + * and the secondary one + */ + spin_lock(&boot_lock); + + /* + * The secondary processor is waiting to be released from + * the holding pen - release it, then wait for it to flag + * that it has been released by resetting pen_release. + * + * Note that "pen_release" is the hardware CPU ID, whereas + * "cpu" is Linux's internal ID. + */ + pen_release = cpu; + flush_cache_all(); + outer_flush_all(); + + timeout = jiffies + (1 * HZ); + while (time_before(jiffies, timeout)) { + smp_rmb(); + if (pen_release == -1) + break; + + udelay(10); + } + + /* + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ + spin_unlock(&boot_lock); + + return pen_release != -1 ? -ENOSYS : 0; +} + +/* + * Initialise the CPU possible map early - this describes the CPUs + * which may be present or become present in the system. + */ +static void __init spear13xx_smp_init_cpus(void) +{ + unsigned int i, ncores = scu_get_core_count(scu_base); + + if (ncores > nr_cpu_ids) { + pr_warn("SMP: %u cores greater than maximum (%u), clipping\n", + ncores, nr_cpu_ids); + ncores = nr_cpu_ids; + } + + for (i = 0; i < ncores; i++) + set_cpu_possible(i, true); +} + +static void __init spear13xx_smp_prepare_cpus(unsigned int max_cpus) +{ + + scu_enable(scu_base); + + /* + * Write the address of secondary startup into the system-wide location + * (presently it is in SRAM). The BootMonitor waits until it receives a + * soft interrupt, and then the secondary CPU branches to this address. + */ + __raw_writel(virt_to_phys(spear13xx_secondary_startup), SYS_LOCATION); +} + +struct smp_operations spear13xx_smp_ops __initdata = { + .smp_init_cpus = spear13xx_smp_init_cpus, + .smp_prepare_cpus = spear13xx_smp_prepare_cpus, + .smp_secondary_init = spear13xx_secondary_init, + .smp_boot_secondary = spear13xx_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = spear13xx_cpu_die, +#endif +}; diff --git a/arch/arm/mach-spear/restart.c b/arch/arm/mach-spear/restart.c new file mode 100644 index 00000000000..7d4616d5df1 --- /dev/null +++ b/arch/arm/mach-spear/restart.c @@ -0,0 +1,33 @@ +/* + * arch/arm/plat-spear/restart.c + * + * SPEAr platform specific restart functions + * + * Copyright (C) 2009 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ +#include <linux/io.h> +#include <linux/amba/sp810.h> +#include <asm/system_misc.h> +#include <mach/spear.h> +#include <mach/generic.h> + +#define SPEAR13XX_SYS_SW_RES (VA_MISC_BASE + 0x204) +void spear_restart(char mode, const char *cmd) +{ + if (mode == 's') { + /* software reset, Jump into ROM at address 0 */ + soft_restart(0); + } else { + /* hardware reset, Use on-chip reset capability */ +#ifdef CONFIG_ARCH_SPEAR13XX + writel_relaxed(0x01, SPEAR13XX_SYS_SW_RES); +#else + sysctl_soft_reset((void __iomem *)VA_SPEAR_SYS_CTRL_BASE); +#endif + } +} diff --git a/arch/arm/mach-spear/spear1310.c b/arch/arm/mach-spear/spear1310.c new file mode 100644 index 00000000000..56214d1076e --- /dev/null +++ b/arch/arm/mach-spear/spear1310.c @@ -0,0 +1,98 @@ +/* + * arch/arm/mach-spear13xx/spear1310.c + * + * SPEAr1310 machine source file + * + * Copyright (C) 2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#define pr_fmt(fmt) "SPEAr1310: " fmt + +#include <linux/amba/pl022.h> +#include <linux/irqchip.h> +#include <linux/of_platform.h> +#include <linux/pata_arasan_cf_data.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <mach/generic.h> +#include <mach/spear.h> + +/* Base addresses */ +#define SPEAR1310_SSP1_BASE UL(0x5D400000) +#define SPEAR1310_SATA0_BASE UL(0xB1000000) +#define SPEAR1310_SATA1_BASE UL(0xB1800000) +#define SPEAR1310_SATA2_BASE UL(0xB4000000) + +#define SPEAR1310_RAS_GRP1_BASE UL(0xD8000000) +#define VA_SPEAR1310_RAS_GRP1_BASE UL(0xFA000000) +#define SPEAR1310_RAS_BASE UL(0xD8400000) +#define VA_SPEAR1310_RAS_BASE IOMEM(UL(0xFA400000)) + +static struct arasan_cf_pdata cf_pdata = { + .cf_if_clk = CF_IF_CLK_166M, + .quirk = CF_BROKEN_UDMA, + .dma_priv = &cf_dma_priv, +}; + +/* ssp device registration */ +static struct pl022_ssp_controller ssp1_plat_data = { + .enable_dma = 0, +}; + +/* Add SPEAr1310 auxdata to pass platform data */ +static struct of_dev_auxdata spear1310_auxdata_lookup[] __initdata = { + OF_DEV_AUXDATA("arasan,cf-spear1340", MCIF_CF_BASE, NULL, &cf_pdata), + OF_DEV_AUXDATA("snps,dma-spear1340", DMAC0_BASE, NULL, &dmac_plat_data), + OF_DEV_AUXDATA("snps,dma-spear1340", DMAC1_BASE, NULL, &dmac_plat_data), + OF_DEV_AUXDATA("arm,pl022", SSP_BASE, NULL, &pl022_plat_data), + + OF_DEV_AUXDATA("arm,pl022", SPEAR1310_SSP1_BASE, NULL, &ssp1_plat_data), + {} +}; + +static void __init spear1310_dt_init(void) +{ + of_platform_populate(NULL, of_default_bus_match_table, + spear1310_auxdata_lookup, NULL); +} + +static const char * const spear1310_dt_board_compat[] = { + "st,spear1310", + "st,spear1310-evb", + NULL, +}; + +/* + * Following will create 16MB static virtual/physical mappings + * PHYSICAL VIRTUAL + * 0xD8000000 0xFA000000 + */ +struct map_desc spear1310_io_desc[] __initdata = { + { + .virtual = VA_SPEAR1310_RAS_GRP1_BASE, + .pfn = __phys_to_pfn(SPEAR1310_RAS_GRP1_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, +}; + +static void __init spear1310_map_io(void) +{ + iotable_init(spear1310_io_desc, ARRAY_SIZE(spear1310_io_desc)); + spear13xx_map_io(); +} + +DT_MACHINE_START(SPEAR1310_DT, "ST SPEAr1310 SoC with Flattened Device Tree") + .smp = smp_ops(spear13xx_smp_ops), + .map_io = spear1310_map_io, + .init_irq = irqchip_init, + .init_time = spear13xx_timer_init, + .init_machine = spear1310_dt_init, + .restart = spear_restart, + .dt_compat = spear1310_dt_board_compat, +MACHINE_END diff --git a/arch/arm/mach-spear/spear1340.c b/arch/arm/mach-spear/spear1340.c new file mode 100644 index 00000000000..b01c4c7009a --- /dev/null +++ b/arch/arm/mach-spear/spear1340.c @@ -0,0 +1,193 @@ +/* + * arch/arm/mach-spear13xx/spear1340.c + * + * SPEAr1340 machine source file + * + * Copyright (C) 2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#define pr_fmt(fmt) "SPEAr1340: " fmt + +#include <linux/ahci_platform.h> +#include <linux/amba/serial.h> +#include <linux/delay.h> +#include <linux/dw_dmac.h> +#include <linux/of_platform.h> +#include <linux/irqchip.h> +#include <asm/mach/arch.h> +#include <mach/generic.h> +#include <mach/spear.h> + +#include "spear13xx-dma.h" + +/* Base addresses */ +#define SPEAR1340_SATA_BASE UL(0xB1000000) +#define SPEAR1340_UART1_BASE UL(0xB4100000) + +/* Power Management Registers */ +#define SPEAR1340_PCM_CFG (VA_MISC_BASE + 0x100) +#define SPEAR1340_PCM_WKUP_CFG (VA_MISC_BASE + 0x104) +#define SPEAR1340_SWITCH_CTR (VA_MISC_BASE + 0x108) + +#define SPEAR1340_PERIP1_SW_RST (VA_MISC_BASE + 0x318) +#define SPEAR1340_PERIP2_SW_RST (VA_MISC_BASE + 0x31C) +#define SPEAR1340_PERIP3_SW_RST (VA_MISC_BASE + 0x320) + +/* PCIE - SATA configuration registers */ +#define SPEAR1340_PCIE_SATA_CFG (VA_MISC_BASE + 0x424) + /* PCIE CFG MASks */ + #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT (1 << 11) + #define SPEAR1340_PCIE_CFG_POWERUP_RESET (1 << 10) + #define SPEAR1340_PCIE_CFG_CORE_CLK_EN (1 << 9) + #define SPEAR1340_PCIE_CFG_AUX_CLK_EN (1 << 8) + #define SPEAR1340_SATA_CFG_TX_CLK_EN (1 << 4) + #define SPEAR1340_SATA_CFG_RX_CLK_EN (1 << 3) + #define SPEAR1340_SATA_CFG_POWERUP_RESET (1 << 2) + #define SPEAR1340_SATA_CFG_PM_CLK_EN (1 << 1) + #define SPEAR1340_PCIE_SATA_SEL_PCIE (0) + #define SPEAR1340_PCIE_SATA_SEL_SATA (1) + #define SPEAR1340_SATA_PCIE_CFG_MASK 0xF1F + #define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \ + SPEAR1340_PCIE_CFG_AUX_CLK_EN | \ + SPEAR1340_PCIE_CFG_CORE_CLK_EN | \ + SPEAR1340_PCIE_CFG_POWERUP_RESET | \ + SPEAR1340_PCIE_CFG_DEVICE_PRESENT) + #define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \ + SPEAR1340_SATA_CFG_PM_CLK_EN | \ + SPEAR1340_SATA_CFG_POWERUP_RESET | \ + SPEAR1340_SATA_CFG_RX_CLK_EN | \ + SPEAR1340_SATA_CFG_TX_CLK_EN) + +#define SPEAR1340_PCIE_MIPHY_CFG (VA_MISC_BASE + 0x428) + #define SPEAR1340_MIPHY_OSC_BYPASS_EXT (1 << 31) + #define SPEAR1340_MIPHY_CLK_REF_DIV2 (1 << 27) + #define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27) + #define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27) + #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0) + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \ + (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ + SPEAR1340_MIPHY_CLK_REF_DIV2 | \ + SPEAR1340_MIPHY_PLL_RATIO_TOP(60)) + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \ + (SPEAR1340_MIPHY_PLL_RATIO_TOP(120)) + #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \ + (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \ + SPEAR1340_MIPHY_PLL_RATIO_TOP(25)) + +static struct dw_dma_slave uart1_dma_param[] = { + { + /* Tx */ + .cfg_hi = DWC_CFGH_DST_PER(SPEAR1340_DMA_REQ_UART1_TX), + .cfg_lo = 0, + .src_master = DMA_MASTER_MEMORY, + .dst_master = SPEAR1340_DMA_MASTER_UART1, + }, { + /* Rx */ + .cfg_hi = DWC_CFGH_SRC_PER(SPEAR1340_DMA_REQ_UART1_RX), + .cfg_lo = 0, + .src_master = SPEAR1340_DMA_MASTER_UART1, + .dst_master = DMA_MASTER_MEMORY, + } +}; + +static struct amba_pl011_data uart1_data = { + .dma_filter = dw_dma_filter, + .dma_tx_param = &uart1_dma_param[0], + .dma_rx_param = &uart1_dma_param[1], +}; + +/* SATA device registration */ +static int sata_miphy_init(struct device *dev, void __iomem *addr) +{ + writel(SPEAR1340_SATA_CFG_VAL, SPEAR1340_PCIE_SATA_CFG); + writel(SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK, + SPEAR1340_PCIE_MIPHY_CFG); + /* Switch on sata power domain */ + writel((readl(SPEAR1340_PCM_CFG) | (0x800)), SPEAR1340_PCM_CFG); + msleep(20); + /* Disable PCIE SATA Controller reset */ + writel((readl(SPEAR1340_PERIP1_SW_RST) & (~0x1000)), + SPEAR1340_PERIP1_SW_RST); + msleep(20); + + return 0; +} + +void sata_miphy_exit(struct device *dev) +{ + writel(0, SPEAR1340_PCIE_SATA_CFG); + writel(0, SPEAR1340_PCIE_MIPHY_CFG); + + /* Enable PCIE SATA Controller reset */ + writel((readl(SPEAR1340_PERIP1_SW_RST) | (0x1000)), + SPEAR1340_PERIP1_SW_RST); + msleep(20); + /* Switch off sata power domain */ + writel((readl(SPEAR1340_PCM_CFG) & (~0x800)), SPEAR1340_PCM_CFG); + msleep(20); +} + +int sata_suspend(struct device *dev) +{ + if (dev->power.power_state.event == PM_EVENT_FREEZE) + return 0; + + sata_miphy_exit(dev); + + return 0; +} + +int sata_resume(struct device *dev) +{ + if (dev->power.power_state.event == PM_EVENT_THAW) + return 0; + + return sata_miphy_init(dev, NULL); +} + +static struct ahci_platform_data sata_pdata = { + .init = sata_miphy_init, + .exit = sata_miphy_exit, + .suspend = sata_suspend, + .resume = sata_resume, +}; + +/* Add SPEAr1340 auxdata to pass platform data */ +static struct of_dev_auxdata spear1340_auxdata_lookup[] __initdata = { + OF_DEV_AUXDATA("arasan,cf-spear1340", MCIF_CF_BASE, NULL, &cf_dma_priv), + OF_DEV_AUXDATA("snps,dma-spear1340", DMAC0_BASE, NULL, &dmac_plat_data), + OF_DEV_AUXDATA("snps,dma-spear1340", DMAC1_BASE, NULL, &dmac_plat_data), + OF_DEV_AUXDATA("arm,pl022", SSP_BASE, NULL, &pl022_plat_data), + + OF_DEV_AUXDATA("snps,spear-ahci", SPEAR1340_SATA_BASE, NULL, + &sata_pdata), + OF_DEV_AUXDATA("arm,pl011", SPEAR1340_UART1_BASE, NULL, &uart1_data), + {} +}; + +static void __init spear1340_dt_init(void) +{ + of_platform_populate(NULL, of_default_bus_match_table, + spear1340_auxdata_lookup, NULL); +} + +static const char * const spear1340_dt_board_compat[] = { + "st,spear1340", + "st,spear1340-evb", + NULL, +}; + +DT_MACHINE_START(SPEAR1340_DT, "ST SPEAr1340 SoC with Flattened Device Tree") + .smp = smp_ops(spear13xx_smp_ops), + .map_io = spear13xx_map_io, + .init_irq = irqchip_init, + .init_time = spear13xx_timer_init, + .init_machine = spear1340_dt_init, + .restart = spear_restart, + .dt_compat = spear1340_dt_board_compat, +MACHINE_END diff --git a/arch/arm/mach-spear/spear13xx-dma.h b/arch/arm/mach-spear/spear13xx-dma.h new file mode 100644 index 00000000000..d50bdb60592 --- /dev/null +++ b/arch/arm/mach-spear/spear13xx-dma.h @@ -0,0 +1,128 @@ +/* + * arch/arm/mach-spear13xx/include/mach/dma.h + * + * DMA information for SPEAr13xx machine family + * + * Copyright (C) 2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __MACH_DMA_H +#define __MACH_DMA_H + +/* request id of all the peripherals */ +enum dma_master_info { + /* Accessible from only one master */ + DMA_MASTER_MCIF = 0, + DMA_MASTER_FSMC = 1, + /* Accessible from both 0 & 1 */ + DMA_MASTER_MEMORY = 0, + DMA_MASTER_ADC = 0, + DMA_MASTER_UART0 = 0, + DMA_MASTER_SSP0 = 0, + DMA_MASTER_I2C0 = 0, + +#ifdef CONFIG_MACH_SPEAR1310 + /* Accessible from only one master */ + SPEAR1310_DMA_MASTER_JPEG = 1, + + /* Accessible from both 0 & 1 */ + SPEAR1310_DMA_MASTER_I2S = 0, + SPEAR1310_DMA_MASTER_UART1 = 0, + SPEAR1310_DMA_MASTER_UART2 = 0, + SPEAR1310_DMA_MASTER_UART3 = 0, + SPEAR1310_DMA_MASTER_UART4 = 0, + SPEAR1310_DMA_MASTER_UART5 = 0, + SPEAR1310_DMA_MASTER_I2C1 = 0, + SPEAR1310_DMA_MASTER_I2C2 = 0, + SPEAR1310_DMA_MASTER_I2C3 = 0, + SPEAR1310_DMA_MASTER_I2C4 = 0, + SPEAR1310_DMA_MASTER_I2C5 = 0, + SPEAR1310_DMA_MASTER_I2C6 = 0, + SPEAR1310_DMA_MASTER_I2C7 = 0, + SPEAR1310_DMA_MASTER_SSP1 = 0, +#endif + +#ifdef CONFIG_MACH_SPEAR1340 + /* Accessible from only one master */ + SPEAR1340_DMA_MASTER_I2S_PLAY = 1, + SPEAR1340_DMA_MASTER_I2S_REC = 1, + SPEAR1340_DMA_MASTER_I2C1 = 1, + SPEAR1340_DMA_MASTER_UART1 = 1, + + /* following are accessible from both master 0 & 1 */ + SPEAR1340_DMA_MASTER_SPDIF = 0, + SPEAR1340_DMA_MASTER_CAM = 1, + SPEAR1340_DMA_MASTER_VIDEO_IN = 0, + SPEAR1340_DMA_MASTER_MALI = 0, +#endif +}; + +enum request_id { + DMA_REQ_ADC = 0, + DMA_REQ_SSP0_TX = 4, + DMA_REQ_SSP0_RX = 5, + DMA_REQ_UART0_TX = 6, + DMA_REQ_UART0_RX = 7, + DMA_REQ_I2C0_TX = 8, + DMA_REQ_I2C0_RX = 9, + +#ifdef CONFIG_MACH_SPEAR1310 + SPEAR1310_DMA_REQ_FROM_JPEG = 2, + SPEAR1310_DMA_REQ_TO_JPEG = 3, + SPEAR1310_DMA_REQ_I2S_TX = 10, + SPEAR1310_DMA_REQ_I2S_RX = 11, + + SPEAR1310_DMA_REQ_I2C1_RX = 0, + SPEAR1310_DMA_REQ_I2C1_TX = 1, + SPEAR1310_DMA_REQ_I2C2_RX = 2, + SPEAR1310_DMA_REQ_I2C2_TX = 3, + SPEAR1310_DMA_REQ_I2C3_RX = 4, + SPEAR1310_DMA_REQ_I2C3_TX = 5, + SPEAR1310_DMA_REQ_I2C4_RX = 6, + SPEAR1310_DMA_REQ_I2C4_TX = 7, + SPEAR1310_DMA_REQ_I2C5_RX = 8, + SPEAR1310_DMA_REQ_I2C5_TX = 9, + SPEAR1310_DMA_REQ_I2C6_RX = 10, + SPEAR1310_DMA_REQ_I2C6_TX = 11, + SPEAR1310_DMA_REQ_UART1_RX = 12, + SPEAR1310_DMA_REQ_UART1_TX = 13, + SPEAR1310_DMA_REQ_UART2_RX = 14, + SPEAR1310_DMA_REQ_UART2_TX = 15, + SPEAR1310_DMA_REQ_UART5_RX = 16, + SPEAR1310_DMA_REQ_UART5_TX = 17, + SPEAR1310_DMA_REQ_SSP1_RX = 18, + SPEAR1310_DMA_REQ_SSP1_TX = 19, + SPEAR1310_DMA_REQ_I2C7_RX = 20, + SPEAR1310_DMA_REQ_I2C7_TX = 21, + SPEAR1310_DMA_REQ_UART3_RX = 28, + SPEAR1310_DMA_REQ_UART3_TX = 29, + SPEAR1310_DMA_REQ_UART4_RX = 30, + SPEAR1310_DMA_REQ_UART4_TX = 31, +#endif + +#ifdef CONFIG_MACH_SPEAR1340 + SPEAR1340_DMA_REQ_SPDIF_TX = 2, + SPEAR1340_DMA_REQ_SPDIF_RX = 3, + SPEAR1340_DMA_REQ_I2S_TX = 10, + SPEAR1340_DMA_REQ_I2S_RX = 11, + SPEAR1340_DMA_REQ_UART1_TX = 12, + SPEAR1340_DMA_REQ_UART1_RX = 13, + SPEAR1340_DMA_REQ_I2C1_TX = 14, + SPEAR1340_DMA_REQ_I2C1_RX = 15, + SPEAR1340_DMA_REQ_CAM0_EVEN = 0, + SPEAR1340_DMA_REQ_CAM0_ODD = 1, + SPEAR1340_DMA_REQ_CAM1_EVEN = 2, + SPEAR1340_DMA_REQ_CAM1_ODD = 3, + SPEAR1340_DMA_REQ_CAM2_EVEN = 4, + SPEAR1340_DMA_REQ_CAM2_ODD = 5, + SPEAR1340_DMA_REQ_CAM3_EVEN = 6, + SPEAR1340_DMA_REQ_CAM3_ODD = 7, +#endif +}; + +#endif /* __MACH_DMA_H */ diff --git a/arch/arm/mach-spear/spear13xx.c b/arch/arm/mach-spear/spear13xx.c new file mode 100644 index 00000000000..988fefebf81 --- /dev/null +++ b/arch/arm/mach-spear/spear13xx.c @@ -0,0 +1,184 @@ +/* + * arch/arm/mach-spear13xx/spear13xx.c + * + * SPEAr13XX machines common source file + * + * Copyright (C) 2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#define pr_fmt(fmt) "SPEAr13xx: " fmt + +#include <linux/amba/pl022.h> +#include <linux/clk.h> +#include <linux/dw_dmac.h> +#include <linux/err.h> +#include <linux/of.h> +#include <asm/hardware/cache-l2x0.h> +#include <asm/mach/map.h> +#include <asm/smp_twd.h> +#include <mach/generic.h> +#include <mach/spear.h> + +#include "spear13xx-dma.h" + +/* common dw_dma filter routine to be used by peripherals */ +bool dw_dma_filter(struct dma_chan *chan, void *slave) +{ + struct dw_dma_slave *dws = (struct dw_dma_slave *)slave; + + if (chan->device->dev == dws->dma_dev) { + chan->private = slave; + return true; + } else { + return false; + } +} + +/* ssp device registration */ +static struct dw_dma_slave ssp_dma_param[] = { + { + /* Tx */ + .cfg_hi = DWC_CFGH_DST_PER(DMA_REQ_SSP0_TX), + .cfg_lo = 0, + .src_master = DMA_MASTER_MEMORY, + .dst_master = DMA_MASTER_SSP0, + }, { + /* Rx */ + .cfg_hi = DWC_CFGH_SRC_PER(DMA_REQ_SSP0_RX), + .cfg_lo = 0, + .src_master = DMA_MASTER_SSP0, + .dst_master = DMA_MASTER_MEMORY, + } +}; + +struct pl022_ssp_controller pl022_plat_data = { + .enable_dma = 1, + .dma_filter = dw_dma_filter, + .dma_rx_param = &ssp_dma_param[1], + .dma_tx_param = &ssp_dma_param[0], +}; + +/* CF device registration */ +struct dw_dma_slave cf_dma_priv = { + .cfg_hi = 0, + .cfg_lo = 0, + .src_master = 0, + .dst_master = 0, +}; + +/* dmac device registeration */ +struct dw_dma_platform_data dmac_plat_data = { + .nr_channels = 8, + .chan_allocation_order = CHAN_ALLOCATION_DESCENDING, + .chan_priority = CHAN_PRIORITY_DESCENDING, + .block_size = 4095U, + .nr_masters = 2, + .data_width = { 3, 3, 0, 0 }, +}; + +void __init spear13xx_l2x0_init(void) +{ + /* + * 512KB (64KB/way), 8-way associativity, parity supported + * + * FIXME: 9th bit, of Auxillary Controller register must be set + * for some spear13xx devices for stable L2 operation. + * + * Enable Early BRESP, L2 prefetch for Instruction and Data, + * write alloc and 'Full line of zero' options + * + */ + + writel_relaxed(0x06, VA_L2CC_BASE + L2X0_PREFETCH_CTRL); + + /* + * Program following latencies in order to make + * SPEAr1340 work at 600 MHz + */ + writel_relaxed(0x221, VA_L2CC_BASE + L2X0_TAG_LATENCY_CTRL); + writel_relaxed(0x441, VA_L2CC_BASE + L2X0_DATA_LATENCY_CTRL); + l2x0_init(VA_L2CC_BASE, 0x70A60001, 0xfe00ffff); +} + +/* + * Following will create 16MB static virtual/physical mappings + * PHYSICAL VIRTUAL + * 0xB3000000 0xFE000000 + * 0xE0000000 0xFD000000 + * 0xEC000000 0xFC000000 + * 0xED000000 0xFB000000 + */ +struct map_desc spear13xx_io_desc[] __initdata = { + { + .virtual = (unsigned long)VA_PERIP_GRP2_BASE, + .pfn = __phys_to_pfn(PERIP_GRP2_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, { + .virtual = (unsigned long)VA_PERIP_GRP1_BASE, + .pfn = __phys_to_pfn(PERIP_GRP1_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, { + .virtual = (unsigned long)VA_A9SM_AND_MPMC_BASE, + .pfn = __phys_to_pfn(A9SM_AND_MPMC_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, { + .virtual = (unsigned long)VA_L2CC_BASE, + .pfn = __phys_to_pfn(L2CC_BASE), + .length = SZ_4K, + .type = MT_DEVICE + }, +}; + +/* This will create static memory mapping for selected devices */ +void __init spear13xx_map_io(void) +{ + iotable_init(spear13xx_io_desc, ARRAY_SIZE(spear13xx_io_desc)); +} + +static void __init spear13xx_clk_init(void) +{ + if (of_machine_is_compatible("st,spear1310")) + spear1310_clk_init(); + else if (of_machine_is_compatible("st,spear1340")) + spear1340_clk_init(); + else + pr_err("%s: Unknown machine\n", __func__); +} + +void __init spear13xx_timer_init(void) +{ + char pclk_name[] = "osc_24m_clk"; + struct clk *gpt_clk, *pclk; + + spear13xx_clk_init(); + + /* get the system timer clock */ + gpt_clk = clk_get_sys("gpt0", NULL); + if (IS_ERR(gpt_clk)) { + pr_err("%s:couldn't get clk for gpt\n", __func__); + BUG(); + } + + /* get the suitable parent clock for timer*/ + pclk = clk_get(NULL, pclk_name); + if (IS_ERR(pclk)) { + pr_err("%s:couldn't get %s as parent for gpt\n", __func__, + pclk_name); + BUG(); + } + + clk_set_parent(gpt_clk, pclk); + clk_put(gpt_clk); + clk_put(pclk); + + spear_setup_of_timer(); + twd_local_timer_of_register(); +} diff --git a/arch/arm/mach-spear/spear300.c b/arch/arm/mach-spear/spear300.c new file mode 100644 index 00000000000..72449eeaa6a --- /dev/null +++ b/arch/arm/mach-spear/spear300.c @@ -0,0 +1,220 @@ +/* + * arch/arm/mach-spear3xx/spear300.c + * + * SPEAr300 machine source file + * + * Copyright (C) 2009-2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#define pr_fmt(fmt) "SPEAr300: " fmt + +#include <linux/amba/pl08x.h> +#include <linux/irqchip.h> +#include <linux/of_platform.h> +#include <asm/mach/arch.h> +#include <mach/generic.h> +#include <mach/spear.h> + +/* DMAC platform data's slave info */ +struct pl08x_channel_data spear300_dma_info[] = { + { + .bus_id = "uart0_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart0_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp0_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp0_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "irda", + .min_signal = 12, + .max_signal = 12, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "adc", + .min_signal = 13, + .max_signal = 13, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "to_jpeg", + .min_signal = 14, + .max_signal = 14, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "from_jpeg", + .min_signal = 15, + .max_signal = 15, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras0_rx", + .min_signal = 0, + .max_signal = 0, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras0_tx", + .min_signal = 1, + .max_signal = 1, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras1_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras1_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras2_rx", + .min_signal = 4, + .max_signal = 4, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras2_tx", + .min_signal = 5, + .max_signal = 5, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras3_rx", + .min_signal = 6, + .max_signal = 6, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras3_tx", + .min_signal = 7, + .max_signal = 7, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras4_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras4_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras5_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras5_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras6_rx", + .min_signal = 12, + .max_signal = 12, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras6_tx", + .min_signal = 13, + .max_signal = 13, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras7_rx", + .min_signal = 14, + .max_signal = 14, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras7_tx", + .min_signal = 15, + .max_signal = 15, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, +}; + +/* Add SPEAr300 auxdata to pass platform data */ +static struct of_dev_auxdata spear300_auxdata_lookup[] __initdata = { + OF_DEV_AUXDATA("arm,pl022", SPEAR3XX_ICM1_SSP_BASE, NULL, + &pl022_plat_data), + OF_DEV_AUXDATA("arm,pl080", SPEAR_ICM3_DMA_BASE, NULL, + &pl080_plat_data), + {} +}; + +static void __init spear300_dt_init(void) +{ + pl080_plat_data.slave_channels = spear300_dma_info; + pl080_plat_data.num_slave_channels = ARRAY_SIZE(spear300_dma_info); + + of_platform_populate(NULL, of_default_bus_match_table, + spear300_auxdata_lookup, NULL); +} + +static const char * const spear300_dt_board_compat[] = { + "st,spear300", + "st,spear300-evb", + NULL, +}; + +static void __init spear300_map_io(void) +{ + spear3xx_map_io(); +} + +DT_MACHINE_START(SPEAR300_DT, "ST SPEAr300 SoC with Flattened Device Tree") + .map_io = spear300_map_io, + .init_irq = irqchip_init, + .init_time = spear3xx_timer_init, + .init_machine = spear300_dt_init, + .restart = spear_restart, + .dt_compat = spear300_dt_board_compat, +MACHINE_END diff --git a/arch/arm/mach-spear/spear310.c b/arch/arm/mach-spear/spear310.c new file mode 100644 index 00000000000..0b7962d2769 --- /dev/null +++ b/arch/arm/mach-spear/spear310.c @@ -0,0 +1,262 @@ +/* + * arch/arm/mach-spear3xx/spear310.c + * + * SPEAr310 machine source file + * + * Copyright (C) 2009-2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#define pr_fmt(fmt) "SPEAr310: " fmt + +#include <linux/amba/pl08x.h> +#include <linux/amba/serial.h> +#include <linux/irqchip.h> +#include <linux/of_platform.h> +#include <asm/mach/arch.h> +#include <mach/generic.h> +#include <mach/spear.h> + +#define SPEAR310_UART1_BASE UL(0xB2000000) +#define SPEAR310_UART2_BASE UL(0xB2080000) +#define SPEAR310_UART3_BASE UL(0xB2100000) +#define SPEAR310_UART4_BASE UL(0xB2180000) +#define SPEAR310_UART5_BASE UL(0xB2200000) + +/* DMAC platform data's slave info */ +struct pl08x_channel_data spear310_dma_info[] = { + { + .bus_id = "uart0_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart0_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp0_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp0_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "irda", + .min_signal = 12, + .max_signal = 12, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "adc", + .min_signal = 13, + .max_signal = 13, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "to_jpeg", + .min_signal = 14, + .max_signal = 14, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "from_jpeg", + .min_signal = 15, + .max_signal = 15, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart1_rx", + .min_signal = 0, + .max_signal = 0, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart1_tx", + .min_signal = 1, + .max_signal = 1, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart2_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart2_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart3_rx", + .min_signal = 4, + .max_signal = 4, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart3_tx", + .min_signal = 5, + .max_signal = 5, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart4_rx", + .min_signal = 6, + .max_signal = 6, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart4_tx", + .min_signal = 7, + .max_signal = 7, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart5_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart5_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras5_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras5_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras6_rx", + .min_signal = 12, + .max_signal = 12, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras6_tx", + .min_signal = 13, + .max_signal = 13, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras7_rx", + .min_signal = 14, + .max_signal = 14, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras7_tx", + .min_signal = 15, + .max_signal = 15, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, +}; + +/* uart devices plat data */ +static struct amba_pl011_data spear310_uart_data[] = { + { + .dma_filter = pl08x_filter_id, + .dma_tx_param = "uart1_tx", + .dma_rx_param = "uart1_rx", + }, { + .dma_filter = pl08x_filter_id, + .dma_tx_param = "uart2_tx", + .dma_rx_param = "uart2_rx", + }, { + .dma_filter = pl08x_filter_id, + .dma_tx_param = "uart3_tx", + .dma_rx_param = "uart3_rx", + }, { + .dma_filter = pl08x_filter_id, + .dma_tx_param = "uart4_tx", + .dma_rx_param = "uart4_rx", + }, { + .dma_filter = pl08x_filter_id, + .dma_tx_param = "uart5_tx", + .dma_rx_param = "uart5_rx", + }, +}; + +/* Add SPEAr310 auxdata to pass platform data */ +static struct of_dev_auxdata spear310_auxdata_lookup[] __initdata = { + OF_DEV_AUXDATA("arm,pl022", SPEAR3XX_ICM1_SSP_BASE, NULL, + &pl022_plat_data), + OF_DEV_AUXDATA("arm,pl080", SPEAR_ICM3_DMA_BASE, NULL, + &pl080_plat_data), + OF_DEV_AUXDATA("arm,pl011", SPEAR310_UART1_BASE, NULL, + &spear310_uart_data[0]), + OF_DEV_AUXDATA("arm,pl011", SPEAR310_UART2_BASE, NULL, + &spear310_uart_data[1]), + OF_DEV_AUXDATA("arm,pl011", SPEAR310_UART3_BASE, NULL, + &spear310_uart_data[2]), + OF_DEV_AUXDATA("arm,pl011", SPEAR310_UART4_BASE, NULL, + &spear310_uart_data[3]), + OF_DEV_AUXDATA("arm,pl011", SPEAR310_UART5_BASE, NULL, + &spear310_uart_data[4]), + {} +}; + +static void __init spear310_dt_init(void) +{ + pl080_plat_data.slave_channels = spear310_dma_info; + pl080_plat_data.num_slave_channels = ARRAY_SIZE(spear310_dma_info); + + of_platform_populate(NULL, of_default_bus_match_table, + spear310_auxdata_lookup, NULL); +} + +static const char * const spear310_dt_board_compat[] = { + "st,spear310", + "st,spear310-evb", + NULL, +}; + +static void __init spear310_map_io(void) +{ + spear3xx_map_io(); +} + +DT_MACHINE_START(SPEAR310_DT, "ST SPEAr310 SoC with Flattened Device Tree") + .map_io = spear310_map_io, + .init_irq = irqchip_init, + .init_time = spear3xx_timer_init, + .init_machine = spear310_dt_init, + .restart = spear_restart, + .dt_compat = spear310_dt_board_compat, +MACHINE_END diff --git a/arch/arm/mach-spear/spear320.c b/arch/arm/mach-spear/spear320.c new file mode 100644 index 00000000000..e9db7dbf6c5 --- /dev/null +++ b/arch/arm/mach-spear/spear320.c @@ -0,0 +1,277 @@ +/* + * arch/arm/mach-spear3xx/spear320.c + * + * SPEAr320 machine source file + * + * Copyright (C) 2009-2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#define pr_fmt(fmt) "SPEAr320: " fmt + +#include <linux/amba/pl022.h> +#include <linux/amba/pl08x.h> +#include <linux/amba/serial.h> +#include <linux/irqchip.h> +#include <linux/of_platform.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <mach/generic.h> +#include <mach/spear.h> + +#define SPEAR320_UART1_BASE UL(0xA3000000) +#define SPEAR320_UART2_BASE UL(0xA4000000) +#define SPEAR320_SSP0_BASE UL(0xA5000000) +#define SPEAR320_SSP1_BASE UL(0xA6000000) + +/* DMAC platform data's slave info */ +struct pl08x_channel_data spear320_dma_info[] = { + { + .bus_id = "uart0_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart0_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp0_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp0_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c0_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c0_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "irda", + .min_signal = 12, + .max_signal = 12, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "adc", + .min_signal = 13, + .max_signal = 13, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "to_jpeg", + .min_signal = 14, + .max_signal = 14, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "from_jpeg", + .min_signal = 15, + .max_signal = 15, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp1_rx", + .min_signal = 0, + .max_signal = 0, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ssp1_tx", + .min_signal = 1, + .max_signal = 1, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ssp2_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ssp2_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "uart1_rx", + .min_signal = 4, + .max_signal = 4, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "uart1_tx", + .min_signal = 5, + .max_signal = 5, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "uart2_rx", + .min_signal = 6, + .max_signal = 6, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "uart2_tx", + .min_signal = 7, + .max_signal = 7, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "i2c1_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "i2c1_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "i2c2_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "i2c2_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "i2s_rx", + .min_signal = 12, + .max_signal = 12, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "i2s_tx", + .min_signal = 13, + .max_signal = 13, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "rs485_rx", + .min_signal = 14, + .max_signal = 14, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "rs485_tx", + .min_signal = 15, + .max_signal = 15, + .muxval = 1, + .periph_buses = PL08X_AHB2, + }, +}; + +static struct pl022_ssp_controller spear320_ssp_data[] = { + { + .bus_id = 1, + .enable_dma = 1, + .dma_filter = pl08x_filter_id, + .dma_tx_param = "ssp1_tx", + .dma_rx_param = "ssp1_rx", + .num_chipselect = 2, + }, { + .bus_id = 2, + .enable_dma = 1, + .dma_filter = pl08x_filter_id, + .dma_tx_param = "ssp2_tx", + .dma_rx_param = "ssp2_rx", + .num_chipselect = 2, + } +}; + +static struct amba_pl011_data spear320_uart_data[] = { + { + .dma_filter = pl08x_filter_id, + .dma_tx_param = "uart1_tx", + .dma_rx_param = "uart1_rx", + }, { + .dma_filter = pl08x_filter_id, + .dma_tx_param = "uart2_tx", + .dma_rx_param = "uart2_rx", + }, +}; + +/* Add SPEAr310 auxdata to pass platform data */ +static struct of_dev_auxdata spear320_auxdata_lookup[] __initdata = { + OF_DEV_AUXDATA("arm,pl022", SPEAR3XX_ICM1_SSP_BASE, NULL, + &pl022_plat_data), + OF_DEV_AUXDATA("arm,pl080", SPEAR_ICM3_DMA_BASE, NULL, + &pl080_plat_data), + OF_DEV_AUXDATA("arm,pl022", SPEAR320_SSP0_BASE, NULL, + &spear320_ssp_data[0]), + OF_DEV_AUXDATA("arm,pl022", SPEAR320_SSP1_BASE, NULL, + &spear320_ssp_data[1]), + OF_DEV_AUXDATA("arm,pl011", SPEAR320_UART1_BASE, NULL, + &spear320_uart_data[0]), + OF_DEV_AUXDATA("arm,pl011", SPEAR320_UART2_BASE, NULL, + &spear320_uart_data[1]), + {} +}; + +static void __init spear320_dt_init(void) +{ + pl080_plat_data.slave_channels = spear320_dma_info; + pl080_plat_data.num_slave_channels = ARRAY_SIZE(spear320_dma_info); + + of_platform_populate(NULL, of_default_bus_match_table, + spear320_auxdata_lookup, NULL); +} + +static const char * const spear320_dt_board_compat[] = { + "st,spear320", + "st,spear320-evb", + "st,spear320-hmi", + NULL, +}; + +struct map_desc spear320_io_desc[] __initdata = { + { + .virtual = VA_SPEAR320_SOC_CONFIG_BASE, + .pfn = __phys_to_pfn(SPEAR320_SOC_CONFIG_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, +}; + +static void __init spear320_map_io(void) +{ + iotable_init(spear320_io_desc, ARRAY_SIZE(spear320_io_desc)); + spear3xx_map_io(); +} + +DT_MACHINE_START(SPEAR320_DT, "ST SPEAr320 SoC with Flattened Device Tree") + .map_io = spear320_map_io, + .init_irq = irqchip_init, + .init_time = spear3xx_timer_init, + .init_machine = spear320_dt_init, + .restart = spear_restart, + .dt_compat = spear320_dt_board_compat, +MACHINE_END diff --git a/arch/arm/mach-spear/spear3xx.c b/arch/arm/mach-spear/spear3xx.c new file mode 100644 index 00000000000..d7580f2e5e0 --- /dev/null +++ b/arch/arm/mach-spear/spear3xx.c @@ -0,0 +1,115 @@ +/* + * arch/arm/mach-spear3xx/spear3xx.c + * + * SPEAr3XX machines common source file + * + * Copyright (C) 2009-2012 ST Microelectronics + * Viresh Kumar <viresh.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#define pr_fmt(fmt) "SPEAr3xx: " fmt + +#include <linux/amba/pl022.h> +#include <linux/amba/pl080.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <asm/mach/map.h> +#include <plat/pl080.h> +#include <mach/generic.h> +#include <mach/spear.h> + +/* ssp device registration */ +struct pl022_ssp_controller pl022_plat_data = { + .bus_id = 0, + .enable_dma = 1, + .dma_filter = pl08x_filter_id, + .dma_tx_param = "ssp0_tx", + .dma_rx_param = "ssp0_rx", + /* + * This is number of spi devices that can be connected to spi. There are + * two type of chipselects on which slave devices can work. One is chip + * select provided by spi masters other is controlled through external + * gpio's. We can't use chipselect provided from spi master (because as + * soon as FIFO becomes empty, CS is disabled and transfer ends). So + * this number now depends on number of gpios available for spi. each + * slave on each master requires a separate gpio pin. + */ + .num_chipselect = 2, +}; + +/* dmac device registration */ +struct pl08x_platform_data pl080_plat_data = { + .memcpy_channel = { + .bus_id = "memcpy", + .cctl_memcpy = + (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \ + PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \ + PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \ + PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \ + PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE | \ + PL080_CONTROL_PROT_SYS), + }, + .lli_buses = PL08X_AHB1, + .mem_buses = PL08X_AHB1, + .get_signal = pl080_get_signal, + .put_signal = pl080_put_signal, +}; + +/* + * Following will create 16MB static virtual/physical mappings + * PHYSICAL VIRTUAL + * 0xD0000000 0xFD000000 + * 0xFC000000 0xFC000000 + */ +struct map_desc spear3xx_io_desc[] __initdata = { + { + .virtual = VA_SPEAR_ICM1_2_BASE, + .pfn = __phys_to_pfn(SPEAR_ICM1_2_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, { + .virtual = VA_SPEAR_ICM3_SMI_CTRL_BASE, + .pfn = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, +}; + +/* This will create static memory mapping for selected devices */ +void __init spear3xx_map_io(void) +{ + iotable_init(spear3xx_io_desc, ARRAY_SIZE(spear3xx_io_desc)); +} + +void __init spear3xx_timer_init(void) +{ + char pclk_name[] = "pll3_clk"; + struct clk *gpt_clk, *pclk; + + spear3xx_clk_init(); + + /* get the system timer clock */ + gpt_clk = clk_get_sys("gpt0", NULL); + if (IS_ERR(gpt_clk)) { + pr_err("%s:couldn't get clk for gpt\n", __func__); + BUG(); + } + + /* get the suitable parent clock for timer*/ + pclk = clk_get(NULL, pclk_name); + if (IS_ERR(pclk)) { + pr_err("%s:couldn't get %s as parent for gpt\n", + __func__, pclk_name); + BUG(); + } + + clk_set_parent(gpt_clk, pclk); + clk_put(gpt_clk); + clk_put(pclk); + + spear_setup_of_timer(); +} diff --git a/arch/arm/mach-spear/spear6xx.c b/arch/arm/mach-spear/spear6xx.c new file mode 100644 index 00000000000..97fb31d8c9b --- /dev/null +++ b/arch/arm/mach-spear/spear6xx.c @@ -0,0 +1,430 @@ +/* + * arch/arm/mach-spear6xx/spear6xx.c + * + * SPEAr6XX machines common source file + * + * Copyright (C) 2009 ST Microelectronics + * Rajeev Kumar<rajeev-dlh.kumar@st.com> + * + * Copyright 2012 Stefan Roese <sr@denx.de> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/amba/pl08x.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/irqchip.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/amba/pl080.h> +#include <asm/mach/arch.h> +#include <asm/mach/time.h> +#include <asm/mach/map.h> +#include <plat/pl080.h> +#include <mach/generic.h> +#include <mach/spear.h> + +/* dmac device registration */ +static struct pl08x_channel_data spear600_dma_info[] = { + { + .bus_id = "ssp1_rx", + .min_signal = 0, + .max_signal = 0, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp1_tx", + .min_signal = 1, + .max_signal = 1, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart0_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart0_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart1_rx", + .min_signal = 4, + .max_signal = 4, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "uart1_tx", + .min_signal = 5, + .max_signal = 5, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp2_rx", + .min_signal = 6, + .max_signal = 6, + .muxval = 0, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ssp2_tx", + .min_signal = 7, + .max_signal = 7, + .muxval = 0, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ssp0_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ssp0_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "i2c_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "irda", + .min_signal = 12, + .max_signal = 12, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "adc", + .min_signal = 13, + .max_signal = 13, + .muxval = 0, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "to_jpeg", + .min_signal = 14, + .max_signal = 14, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "from_jpeg", + .min_signal = 15, + .max_signal = 15, + .muxval = 0, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras0_rx", + .min_signal = 0, + .max_signal = 0, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras0_tx", + .min_signal = 1, + .max_signal = 1, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras1_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras1_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras2_rx", + .min_signal = 4, + .max_signal = 4, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras2_tx", + .min_signal = 5, + .max_signal = 5, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras3_rx", + .min_signal = 6, + .max_signal = 6, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras3_tx", + .min_signal = 7, + .max_signal = 7, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras4_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras4_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras5_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras5_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras6_rx", + .min_signal = 12, + .max_signal = 12, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras6_tx", + .min_signal = 13, + .max_signal = 13, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras7_rx", + .min_signal = 14, + .max_signal = 14, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ras7_tx", + .min_signal = 15, + .max_signal = 15, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, { + .bus_id = "ext0_rx", + .min_signal = 0, + .max_signal = 0, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext0_tx", + .min_signal = 1, + .max_signal = 1, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext1_rx", + .min_signal = 2, + .max_signal = 2, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext1_tx", + .min_signal = 3, + .max_signal = 3, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext2_rx", + .min_signal = 4, + .max_signal = 4, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext2_tx", + .min_signal = 5, + .max_signal = 5, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext3_rx", + .min_signal = 6, + .max_signal = 6, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext3_tx", + .min_signal = 7, + .max_signal = 7, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext4_rx", + .min_signal = 8, + .max_signal = 8, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext4_tx", + .min_signal = 9, + .max_signal = 9, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext5_rx", + .min_signal = 10, + .max_signal = 10, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext5_tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext6_rx", + .min_signal = 12, + .max_signal = 12, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext6_tx", + .min_signal = 13, + .max_signal = 13, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext7_rx", + .min_signal = 14, + .max_signal = 14, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, { + .bus_id = "ext7_tx", + .min_signal = 15, + .max_signal = 15, + .muxval = 2, + .periph_buses = PL08X_AHB2, + }, +}; + +struct pl08x_platform_data pl080_plat_data = { + .memcpy_channel = { + .bus_id = "memcpy", + .cctl_memcpy = + (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \ + PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \ + PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \ + PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \ + PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE | \ + PL080_CONTROL_PROT_SYS), + }, + .lli_buses = PL08X_AHB1, + .mem_buses = PL08X_AHB1, + .get_signal = pl080_get_signal, + .put_signal = pl080_put_signal, + .slave_channels = spear600_dma_info, + .num_slave_channels = ARRAY_SIZE(spear600_dma_info), +}; + +/* + * Following will create 16MB static virtual/physical mappings + * PHYSICAL VIRTUAL + * 0xF0000000 0xF0000000 + * 0xF1000000 0xF1000000 + * 0xD0000000 0xFD000000 + * 0xFC000000 0xFC000000 + */ +struct map_desc spear6xx_io_desc[] __initdata = { + { + .virtual = VA_SPEAR6XX_ML_CPU_BASE, + .pfn = __phys_to_pfn(SPEAR_ICM3_ML1_2_BASE), + .length = 2 * SZ_16M, + .type = MT_DEVICE + }, { + .virtual = VA_SPEAR_ICM1_2_BASE, + .pfn = __phys_to_pfn(SPEAR_ICM1_2_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, { + .virtual = VA_SPEAR_ICM3_SMI_CTRL_BASE, + .pfn = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, +}; + +/* This will create static memory mapping for selected devices */ +void __init spear6xx_map_io(void) +{ + iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc)); +} + +void __init spear6xx_timer_init(void) +{ + char pclk_name[] = "pll3_clk"; + struct clk *gpt_clk, *pclk; + + spear6xx_clk_init(); + + /* get the system timer clock */ + gpt_clk = clk_get_sys("gpt0", NULL); + if (IS_ERR(gpt_clk)) { + pr_err("%s:couldn't get clk for gpt\n", __func__); + BUG(); + } + + /* get the suitable parent clock for timer*/ + pclk = clk_get(NULL, pclk_name); + if (IS_ERR(pclk)) { + pr_err("%s:couldn't get %s as parent for gpt\n", + __func__, pclk_name); + BUG(); + } + + clk_set_parent(gpt_clk, pclk); + clk_put(gpt_clk); + clk_put(pclk); + + spear_setup_of_timer(); +} + +/* Add auxdata to pass platform data */ +struct of_dev_auxdata spear6xx_auxdata_lookup[] __initdata = { + OF_DEV_AUXDATA("arm,pl080", SPEAR_ICM3_DMA_BASE, NULL, + &pl080_plat_data), + {} +}; + +static void __init spear600_dt_init(void) +{ + of_platform_populate(NULL, of_default_bus_match_table, + spear6xx_auxdata_lookup, NULL); +} + +static const char *spear600_dt_board_compat[] = { + "st,spear600", + NULL +}; + +DT_MACHINE_START(SPEAR600_DT, "ST SPEAr600 (Flattened Device Tree)") + .map_io = spear6xx_map_io, + .init_irq = irqchip_init, + .init_time = spear6xx_timer_init, + .init_machine = spear600_dt_init, + .restart = spear_restart, + .dt_compat = spear600_dt_board_compat, +MACHINE_END diff --git a/arch/arm/mach-spear/time.c b/arch/arm/mach-spear/time.c new file mode 100644 index 00000000000..bd5c53cd696 --- /dev/null +++ b/arch/arm/mach-spear/time.c @@ -0,0 +1,245 @@ +/* + * arch/arm/plat-spear/time.c + * + * Copyright (C) 2010 ST Microelectronics + * Shiraz Hashim<shiraz.hashim@st.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/clk.h> +#include <linux/clockchips.h> +#include <linux/clocksource.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> +#include <linux/time.h> +#include <linux/irq.h> +#include <asm/mach/time.h> +#include <mach/generic.h> + +/* + * We would use TIMER0 and TIMER1 as clockevent and clocksource. + * Timer0 and Timer1 both belong to same gpt block in cpu subbsystem. Further + * they share same functional clock. Any change in one's functional clock will + * also affect other timer. + */ + +#define CLKEVT 0 /* gpt0, channel0 as clockevent */ +#define CLKSRC 1 /* gpt0, channel1 as clocksource */ + +/* Register offsets, x is channel number */ +#define CR(x) ((x) * 0x80 + 0x80) +#define IR(x) ((x) * 0x80 + 0x84) +#define LOAD(x) ((x) * 0x80 + 0x88) +#define COUNT(x) ((x) * 0x80 + 0x8C) + +/* Reg bit definitions */ +#define CTRL_INT_ENABLE 0x0100 +#define CTRL_ENABLE 0x0020 +#define CTRL_ONE_SHOT 0x0010 + +#define CTRL_PRESCALER1 0x0 +#define CTRL_PRESCALER2 0x1 +#define CTRL_PRESCALER4 0x2 +#define CTRL_PRESCALER8 0x3 +#define CTRL_PRESCALER16 0x4 +#define CTRL_PRESCALER32 0x5 +#define CTRL_PRESCALER64 0x6 +#define CTRL_PRESCALER128 0x7 +#define CTRL_PRESCALER256 0x8 + +#define INT_STATUS 0x1 + +/* + * Minimum clocksource/clockevent timer range in seconds + */ +#define SPEAR_MIN_RANGE 4 + +static __iomem void *gpt_base; +static struct clk *gpt_clk; + +static void clockevent_set_mode(enum clock_event_mode mode, + struct clock_event_device *clk_event_dev); +static int clockevent_next_event(unsigned long evt, + struct clock_event_device *clk_event_dev); + +static void spear_clocksource_init(void) +{ + u32 tick_rate; + u16 val; + + /* program the prescaler (/256)*/ + writew(CTRL_PRESCALER256, gpt_base + CR(CLKSRC)); + + /* find out actual clock driving Timer */ + tick_rate = clk_get_rate(gpt_clk); + tick_rate >>= CTRL_PRESCALER256; + + writew(0xFFFF, gpt_base + LOAD(CLKSRC)); + + val = readw(gpt_base + CR(CLKSRC)); + val &= ~CTRL_ONE_SHOT; /* autoreload mode */ + val |= CTRL_ENABLE ; + writew(val, gpt_base + CR(CLKSRC)); + + /* register the clocksource */ + clocksource_mmio_init(gpt_base + COUNT(CLKSRC), "tmr1", tick_rate, + 200, 16, clocksource_mmio_readw_up); +} + +static struct clock_event_device clkevt = { + .name = "tmr0", + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .set_mode = clockevent_set_mode, + .set_next_event = clockevent_next_event, + .shift = 0, /* to be computed */ +}; + +static void clockevent_set_mode(enum clock_event_mode mode, + struct clock_event_device *clk_event_dev) +{ + u32 period; + u16 val; + + /* stop the timer */ + val = readw(gpt_base + CR(CLKEVT)); + val &= ~CTRL_ENABLE; + writew(val, gpt_base + CR(CLKEVT)); + + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: + period = clk_get_rate(gpt_clk) / HZ; + period >>= CTRL_PRESCALER16; + writew(period, gpt_base + LOAD(CLKEVT)); + + val = readw(gpt_base + CR(CLKEVT)); + val &= ~CTRL_ONE_SHOT; + val |= CTRL_ENABLE | CTRL_INT_ENABLE; + writew(val, gpt_base + CR(CLKEVT)); + + break; + case CLOCK_EVT_MODE_ONESHOT: + val = readw(gpt_base + CR(CLKEVT)); + val |= CTRL_ONE_SHOT; + writew(val, gpt_base + CR(CLKEVT)); + + break; + case CLOCK_EVT_MODE_UNUSED: + case CLOCK_EVT_MODE_SHUTDOWN: + case CLOCK_EVT_MODE_RESUME: + + break; + default: + pr_err("Invalid mode requested\n"); + break; + } +} + +static int clockevent_next_event(unsigned long cycles, + struct clock_event_device *clk_event_dev) +{ + u16 val = readw(gpt_base + CR(CLKEVT)); + + if (val & CTRL_ENABLE) + writew(val & ~CTRL_ENABLE, gpt_base + CR(CLKEVT)); + + writew(cycles, gpt_base + LOAD(CLKEVT)); + + val |= CTRL_ENABLE | CTRL_INT_ENABLE; + writew(val, gpt_base + CR(CLKEVT)); + + return 0; +} + +static irqreturn_t spear_timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *evt = &clkevt; + + writew(INT_STATUS, gpt_base + IR(CLKEVT)); + + evt->event_handler(evt); + + return IRQ_HANDLED; +} + +static struct irqaction spear_timer_irq = { + .name = "timer", + .flags = IRQF_DISABLED | IRQF_TIMER, + .handler = spear_timer_interrupt +}; + +static void __init spear_clockevent_init(int irq) +{ + u32 tick_rate; + + /* program the prescaler */ + writew(CTRL_PRESCALER16, gpt_base + CR(CLKEVT)); + + tick_rate = clk_get_rate(gpt_clk); + tick_rate >>= CTRL_PRESCALER16; + + clkevt.cpumask = cpumask_of(0); + + clockevents_config_and_register(&clkevt, tick_rate, 3, 0xfff0); + + setup_irq(irq, &spear_timer_irq); +} + +const static struct of_device_id timer_of_match[] __initconst = { + { .compatible = "st,spear-timer", }, + { }, +}; + +void __init spear_setup_of_timer(void) +{ + struct device_node *np; + int irq, ret; + + np = of_find_matching_node(NULL, timer_of_match); + if (!np) { + pr_err("%s: No timer passed via DT\n", __func__); + return; + } + + irq = irq_of_parse_and_map(np, 0); + if (!irq) { + pr_err("%s: No irq passed for timer via DT\n", __func__); + return; + } + + gpt_base = of_iomap(np, 0); + if (!gpt_base) { + pr_err("%s: of iomap failed\n", __func__); + return; + } + + gpt_clk = clk_get_sys("gpt0", NULL); + if (!gpt_clk) { + pr_err("%s:couldn't get clk for gpt\n", __func__); + goto err_iomap; + } + + ret = clk_prepare_enable(gpt_clk); + if (ret < 0) { + pr_err("%s:couldn't prepare-enable gpt clock\n", __func__); + goto err_prepare_enable_clk; + } + + spear_clockevent_init(irq); + spear_clocksource_init(); + + return; + +err_prepare_enable_clk: + clk_put(gpt_clk); +err_iomap: + iounmap(gpt_base); +} |