diff options
author | Vikas Manocha <vikas.manocha@st.com> | 2016-02-11 23:47:20 (GMT) |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2016-02-24 23:43:57 (GMT) |
commit | e66c49fa930ed002c507ae0217b4b274c25675fb (patch) | |
tree | b9da51f6a376e8e3fa2fc556bc6d2b8cc45be29d /arch | |
parent | 6a12cebd90a752b0214a65b152703ca63a941478 (diff) | |
download | u-boot-e66c49fa930ed002c507ae0217b4b274c25675fb.tar.xz |
stm32: add support for stm32f7 & stm32f746 discovery board
This patch adds support for stm32f7 family & stm32f746 board.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/include/asm/arch-stm32f7/gpio.h | 113 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-stm32f7/gpt.h | 53 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-stm32f7/rcc.h | 64 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-stm32f7/stm32.h | 63 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-stm32f7/stm32_defs.h | 15 | ||||
-rw-r--r-- | arch/arm/include/asm/arch-stm32f7/stm32_periph.h | 38 | ||||
-rw-r--r-- | arch/arm/mach-stm32/Kconfig | 4 | ||||
-rw-r--r-- | arch/arm/mach-stm32/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/mach-stm32/stm32f7/Kconfig | 8 | ||||
-rw-r--r-- | arch/arm/mach-stm32/stm32f7/Makefile | 8 | ||||
-rw-r--r-- | arch/arm/mach-stm32/stm32f7/clock.c | 56 | ||||
-rw-r--r-- | arch/arm/mach-stm32/stm32f7/timer.c | 112 |
12 files changed, 535 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-stm32f7/gpio.h b/arch/arm/include/asm/arch-stm32f7/gpio.h new file mode 100644 index 0000000..2942cd9 --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f7/gpio.h @@ -0,0 +1,113 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, <vikas.manocha@st.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _STM32_GPIO_H_ +#define _STM32_GPIO_H_ + +enum stm32_gpio_port { + STM32_GPIO_PORT_A = 0, + STM32_GPIO_PORT_B, + STM32_GPIO_PORT_C, + STM32_GPIO_PORT_D, + STM32_GPIO_PORT_E, + STM32_GPIO_PORT_F, + STM32_GPIO_PORT_G, + STM32_GPIO_PORT_H, + STM32_GPIO_PORT_I +}; + +enum stm32_gpio_pin { + STM32_GPIO_PIN_0 = 0, + STM32_GPIO_PIN_1, + STM32_GPIO_PIN_2, + STM32_GPIO_PIN_3, + STM32_GPIO_PIN_4, + STM32_GPIO_PIN_5, + STM32_GPIO_PIN_6, + STM32_GPIO_PIN_7, + STM32_GPIO_PIN_8, + STM32_GPIO_PIN_9, + STM32_GPIO_PIN_10, + STM32_GPIO_PIN_11, + STM32_GPIO_PIN_12, + STM32_GPIO_PIN_13, + STM32_GPIO_PIN_14, + STM32_GPIO_PIN_15 +}; + +enum stm32_gpio_mode { + STM32_GPIO_MODE_IN = 0, + STM32_GPIO_MODE_OUT, + STM32_GPIO_MODE_AF, + STM32_GPIO_MODE_AN +}; + +enum stm32_gpio_otype { + STM32_GPIO_OTYPE_PP = 0, + STM32_GPIO_OTYPE_OD +}; + +enum stm32_gpio_speed { + STM32_GPIO_SPEED_2M = 0, + STM32_GPIO_SPEED_25M, + STM32_GPIO_SPEED_50M, + STM32_GPIO_SPEED_100M +}; + +enum stm32_gpio_pupd { + STM32_GPIO_PUPD_NO = 0, + STM32_GPIO_PUPD_UP, + STM32_GPIO_PUPD_DOWN +}; + +enum stm32_gpio_af { + STM32_GPIO_AF0 = 0, + STM32_GPIO_AF1, + STM32_GPIO_AF2, + STM32_GPIO_AF3, + STM32_GPIO_AF4, + STM32_GPIO_AF5, + STM32_GPIO_AF6, + STM32_GPIO_AF7, + STM32_GPIO_AF8, + STM32_GPIO_AF9, + STM32_GPIO_AF10, + STM32_GPIO_AF11, + STM32_GPIO_AF12, + STM32_GPIO_AF13, + STM32_GPIO_AF14, + STM32_GPIO_AF15 +}; + +struct stm32_gpio_dsc { + enum stm32_gpio_port port; + enum stm32_gpio_pin pin; +}; + +struct stm32_gpio_ctl { + enum stm32_gpio_mode mode; + enum stm32_gpio_otype otype; + enum stm32_gpio_speed speed; + enum stm32_gpio_pupd pupd; + enum stm32_gpio_af af; +}; + +static inline unsigned stm32_gpio_to_port(unsigned gpio) +{ + return gpio / 16; +} + +static inline unsigned stm32_gpio_to_pin(unsigned gpio) +{ + return gpio % 16; +} + +int stm32_gpio_config(const struct stm32_gpio_dsc *gpio_dsc, + const struct stm32_gpio_ctl *gpio_ctl); +int stm32_gpout_set(const struct stm32_gpio_dsc *gpio_dsc, int state); + +#endif /* _STM32_GPIO_H_ */ diff --git a/arch/arm/include/asm/arch-stm32f7/gpt.h b/arch/arm/include/asm/arch-stm32f7/gpt.h new file mode 100644 index 0000000..903bdf6 --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f7/gpt.h @@ -0,0 +1,53 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _STM32_GPT_H +#define _STM32_GPT_H + +#include <asm/arch/stm32.h> + +struct gpt_regs { + u32 cr1; + u32 cr2; + u32 smcr; + u32 dier; + u32 sr; + u32 egr; + u32 ccmr1; + u32 ccmr2; + u32 ccer; + u32 cnt; + u32 psc; + u32 arr; + u32 reserved; + u32 ccr1; + u32 ccr2; + u32 ccr3; + u32 ccr4; + u32 reserved1; + u32 dcr; + u32 dmar; + u32 tim2_5_or; +}; + +struct gpt_regs *const gpt1_regs_ptr = + (struct gpt_regs *)TIM2_BASE; + +/* Timer control1 register */ +#define GPT_CR1_CEN 0x0001 +#define GPT_MODE_AUTO_RELOAD (1 << 7) + +/* Auto reload register for free running config */ +#define GPT_FREE_RUNNING 0xFFFFFFFF + +/* Timer, HZ specific defines */ +#define CONFIG_STM32_HZ 1000 + +/* Timer Event Generation registers */ +#define TIM_EGR_UG (1 << 0) + +#endif diff --git a/arch/arm/include/asm/arch-stm32f7/rcc.h b/arch/arm/include/asm/arch-stm32f7/rcc.h new file mode 100644 index 0000000..8bfb7b6 --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f7/rcc.h @@ -0,0 +1,64 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _STM32_RCC_H +#define _STM32_RCC_H + +#define RCC_CR 0x00 /* clock control */ +#define RCC_PLLCFGR 0x04 /* PLL configuration */ +#define RCC_CFGR 0x08 /* clock configuration */ +#define RCC_CIR 0x0C /* clock interrupt */ +#define RCC_AHB1RSTR 0x10 /* AHB1 peripheral reset */ +#define RCC_AHB2RSTR 0x14 /* AHB2 peripheral reset */ +#define RCC_AHB3RSTR 0x18 /* AHB3 peripheral reset */ +#define RCC_APB1RSTR 0x20 /* APB1 peripheral reset */ +#define RCC_APB2RSTR 0x24 /* APB2 peripheral reset */ +#define RCC_AHB1ENR 0x30 /* AHB1 peripheral clock enable */ +#define RCC_AHB2ENR 0x34 /* AHB2 peripheral clock enable */ +#define RCC_AHB3ENR 0x38 /* AHB3 peripheral clock enable */ +#define RCC_APB1ENR 0x40 /* APB1 peripheral clock enable */ +#define RCC_APB2ENR 0x44 /* APB2 peripheral clock enable */ +#define RCC_AHB1LPENR 0x50 /* periph clk enable in low pwr mode */ +#define RCC_AHB2LPENR 0x54 /* AHB2 periph clk enable in low pwr mode */ +#define RCC_AHB3LPENR 0x58 /* AHB3 periph clk enable in low pwr mode */ +#define RCC_APB1LPENR 0x60 /* APB1 periph clk enable in low pwr mode */ +#define RCC_APB2LPENR 0x64 /* APB2 periph clk enable in low pwr mode */ +#define RCC_BDCR 0x70 /* Backup domain control */ +#define RCC_CSR 0x74 /* clock control & status */ +#define RCC_SSCGR 0x80 /* spread spectrum clock generation */ +#define RCC_PLLI2SCFGR 0x84 /* PLLI2S configuration */ +#define RCC_PLLSAICFG 0x88 /* PLLSAI configuration */ +#define RCC_DCKCFG1 0x8C /* dedicated clocks configuration register */ +#define RCC_DCKCFG2 0x90 /* dedicated clocks configuration register */ + +#define RCC_APB1ENR_TIM2EN (1 << 0) +#define RCC_APB1ENR_PWREN (1 << 28) + +/* + * RCC USART specific definitions + */ +#define RCC_ENR_USART1EN (1 << 4) +#define RCC_ENR_USART2EN (1 << 17) +#define RCC_ENR_USART3EN (1 << 18) +#define RCC_ENR_USART6EN (1 << 5) + +/* + * RCC GPIO specific definitions + */ +#define RCC_ENR_GPIO_A_EN (1 << 0) +#define RCC_ENR_GPIO_B_EN (1 << 1) +#define RCC_ENR_GPIO_C_EN (1 << 2) +#define RCC_ENR_GPIO_D_EN (1 << 3) +#define RCC_ENR_GPIO_E_EN (1 << 4) +#define RCC_ENR_GPIO_F_EN (1 << 5) +#define RCC_ENR_GPIO_G_EN (1 << 6) +#define RCC_ENR_GPIO_H_EN (1 << 7) +#define RCC_ENR_GPIO_I_EN (1 << 8) +#define RCC_ENR_GPIO_J_EN (1 << 9) +#define RCC_ENR_GPIO_K_EN (1 << 10) + +#endif diff --git a/arch/arm/include/asm/arch-stm32f7/stm32.h b/arch/arm/include/asm/arch-stm32f7/stm32.h new file mode 100644 index 0000000..713eb2e --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f7/stm32.h @@ -0,0 +1,63 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, STMicroelectronics, <vikas.manocha@st.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ASM_ARCH_HARDWARE_H +#define _ASM_ARCH_HARDWARE_H + +/* STM32F746 */ +#define ITCM_FLASH_BASE 0x00200000UL +#define AXIM_FLASH_BASE 0x08000000UL + +#define ITCM_SRAM_BASE 0x00000000UL +#define DTCM_SRAM_BASE 0x20000000UL +#define SRAM1_BASE 0x20010000UL +#define SRAM2_BASE 0x2004C000UL + +#define PERIPH_BASE 0x40000000UL + +#define APB1_PERIPH_BASE (PERIPH_BASE + 0x00000000) +#define APB2_PERIPH_BASE (PERIPH_BASE + 0x00010000) +#define AHB1_PERIPH_BASE (PERIPH_BASE + 0x00020000) +#define AHB2_PERIPH_BASE (PERIPH_BASE + 0x10000000) +#define AHB3_PERIPH_BASE (PERIPH_BASE + 0x20000000) + +#define TIM2_BASE (APB1_PERIPH_BASE + 0x0000) +#define USART2_BASE (APB1_PERIPH_BASE + 0x4400) +#define USART3_BASE (APB1_PERIPH_BASE + 0x4800) +#define PWR_BASE (APB1_PERIPH_BASE + 0x7000) + +#define USART1_BASE (APB2_PERIPH_BASE + 0x1000) +#define USART6_BASE (APB2_PERIPH_BASE + 0x1400) + +#define STM32_GPIOA_BASE (AHB1_PERIPH_BASE + 0x0000) +#define STM32_GPIOB_BASE (AHB1_PERIPH_BASE + 0x0400) +#define STM32_GPIOC_BASE (AHB1_PERIPH_BASE + 0x0800) +#define STM32_GPIOD_BASE (AHB1_PERIPH_BASE + 0x0C00) +#define STM32_GPIOE_BASE (AHB1_PERIPH_BASE + 0x1000) +#define STM32_GPIOF_BASE (AHB1_PERIPH_BASE + 0x1400) +#define STM32_GPIOG_BASE (AHB1_PERIPH_BASE + 0x1800) +#define STM32_GPIOH_BASE (AHB1_PERIPH_BASE + 0x1C00) +#define STM32_GPIOI_BASE (AHB1_PERIPH_BASE + 0x2000) +#define STM32_GPIOJ_BASE (AHB1_PERIPH_BASE + 0x2400) +#define STM32_GPIOK_BASE (AHB1_PERIPH_BASE + 0x2800) +#define RCC_BASE (AHB1_PERIPH_BASE + 0x3800) +#define FLASH_CNTL_BASE (AHB1_PERIPH_BASE + 0x3C00) + + +#define SDRAM_FMC_BASE (AHB3_PERIPH_BASE + 0x4A0000140) + +enum clock { + CLOCK_CORE, + CLOCK_AHB, + CLOCK_APB1, + CLOCK_APB2 +}; +#define STM32_BUS_MASK 0xFFFF0000 + +int configure_clocks(void); + +#endif /* _ASM_ARCH_HARDWARE_H */ diff --git a/arch/arm/include/asm/arch-stm32f7/stm32_defs.h b/arch/arm/include/asm/arch-stm32f7/stm32_defs.h new file mode 100644 index 0000000..29b98ae --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f7/stm32_defs.h @@ -0,0 +1,15 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __STM32_DEFS_H__ +#define __STM32_DEFS_H__ +#include <asm/arch/stm32_periph.h> + +int clock_setup(enum periph_clock); + +#endif + diff --git a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h new file mode 100644 index 0000000..38adc4e --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h @@ -0,0 +1,38 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ASM_ARM_ARCH_PERIPH_H +#define __ASM_ARM_ARCH_PERIPH_H + +/* + * Peripherals required for pinmux configuration. List will + * grow with support for more devices getting added. + * Numbering based on interrupt table. + * + */ +enum periph_id { + UART1_GPIOA_9_10 = 0, + UART2_GPIOD_5_6, +}; + +enum periph_clock { + USART1_CLOCK_CFG = 0, + USART2_CLOCK_CFG, + GPIO_A_CLOCK_CFG, + GPIO_B_CLOCK_CFG, + GPIO_C_CLOCK_CFG, + GPIO_D_CLOCK_CFG, + GPIO_E_CLOCK_CFG, + GPIO_F_CLOCK_CFG, + GPIO_G_CLOCK_CFG, + GPIO_H_CLOCK_CFG, + GPIO_I_CLOCK_CFG, + GPIO_J_CLOCK_CFG, + GPIO_K_CLOCK_CFG, +}; + +#endif /* __ASM_ARM_ARCH_PERIPH_H */ diff --git a/arch/arm/mach-stm32/Kconfig b/arch/arm/mach-stm32/Kconfig index 7dbeb04..ec6b3ff 100644 --- a/arch/arm/mach-stm32/Kconfig +++ b/arch/arm/mach-stm32/Kconfig @@ -6,7 +6,11 @@ config STM32F4 config STM32F1 bool "stm32f1 family" +config STM32F7 + bool "stm32f7 family" + source "arch/arm/mach-stm32/stm32f4/Kconfig" source "arch/arm/mach-stm32/stm32f1/Kconfig" +source "arch/arm/mach-stm32/stm32f7/Kconfig" endif diff --git a/arch/arm/mach-stm32/Makefile b/arch/arm/mach-stm32/Makefile index ea06034..ffc537f 100644 --- a/arch/arm/mach-stm32/Makefile +++ b/arch/arm/mach-stm32/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_STM32F1) += stm32f1/ obj-$(CONFIG_STM32F4) += stm32f4/ +obj-$(CONFIG_STM32F7) += stm32f7/ diff --git a/arch/arm/mach-stm32/stm32f7/Kconfig b/arch/arm/mach-stm32/stm32f7/Kconfig new file mode 100644 index 0000000..287e5ad --- /dev/null +++ b/arch/arm/mach-stm32/stm32f7/Kconfig @@ -0,0 +1,8 @@ +if STM32F7 + +config TARGET_STM32F746_DISCO + bool "STM32F746 Discovery board" + +source "board/st/stm32f746-disco/Kconfig" + +endif diff --git a/arch/arm/mach-stm32/stm32f7/Makefile b/arch/arm/mach-stm32/stm32f7/Makefile new file mode 100644 index 0000000..40f1ad3 --- /dev/null +++ b/arch/arm/mach-stm32/stm32f7/Makefile @@ -0,0 +1,8 @@ +# +# (C) Copyright 2016 +# Vikas Manocha, <vikas.manocha@gmail.com> +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += timer.o clock.o diff --git a/arch/arm/mach-stm32/stm32f7/clock.c b/arch/arm/mach-stm32/stm32f7/clock.c new file mode 100644 index 0000000..17a715b --- /dev/null +++ b/arch/arm/mach-stm32/stm32f7/clock.c @@ -0,0 +1,56 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, <vikas.manocha@st.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/rcc.h> +#include <asm/arch/stm32.h> +#include <asm/arch/stm32_periph.h> + +void clock_setup(int peripheral) +{ + switch (peripheral) { + case USART1_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_APB2ENR, RCC_ENR_USART1EN); + break; + case GPIO_A_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_A_EN); + break; + case GPIO_B_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_B_EN); + break; + case GPIO_C_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_C_EN); + break; + case GPIO_D_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_D_EN); + break; + case GPIO_E_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_E_EN); + break; + case GPIO_F_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_F_EN); + break; + case GPIO_G_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_G_EN); + break; + case GPIO_H_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_H_EN); + break; + case GPIO_I_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_I_EN); + break; + case GPIO_J_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_J_EN); + break; + case GPIO_K_CLOCK_CFG: + setbits_le32(RCC_BASE + RCC_AHB1ENR, RCC_ENR_GPIO_K_EN); + break; + default: + break; + } +} diff --git a/arch/arm/mach-stm32/stm32f7/timer.c b/arch/arm/mach-stm32/stm32f7/timer.c new file mode 100644 index 0000000..a7dee10 --- /dev/null +++ b/arch/arm/mach-stm32/stm32f7/timer.c @@ -0,0 +1,112 @@ +/* + * (C) Copyright 2016 + * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/stm32.h> +#include <asm/arch/gpt.h> +#include <asm/arch/rcc.h> + +#define READ_TIMER() (readl(&gpt1_regs_ptr->cnt) & GPT_FREE_RUNNING) +#define GPT_RESOLUTION (CONFIG_SYS_HZ_CLOCK/CONFIG_STM32_HZ) + +DECLARE_GLOBAL_DATA_PTR; + +#define timestamp gd->arch.tbl +#define lastdec gd->arch.lastinc + +int timer_init(void) +{ + /* Timer2 clock configuration */ + setbits_le32(RCC_BASE + RCC_APB1ENR, RCC_APB1ENR_TIM2EN); + /* Stop the timer */ + writel(readl(&gpt1_regs_ptr->cr1) & ~GPT_CR1_CEN, &gpt1_regs_ptr->cr1); + + writel((CONFIG_SYS_CLK_FREQ/CONFIG_SYS_HZ_CLOCK) - 1, + &gpt1_regs_ptr->psc); + + /* Configure timer for auto-reload */ + writel(readl(&gpt1_regs_ptr->cr1) | GPT_MODE_AUTO_RELOAD, + &gpt1_regs_ptr->cr1); + + /* load value for free running */ + writel(GPT_FREE_RUNNING, &gpt1_regs_ptr->arr); + + /* start timer */ + writel(readl(&gpt1_regs_ptr->cr1) | GPT_CR1_CEN, &gpt1_regs_ptr->cr1); + + writel(readl(&gpt1_regs_ptr->egr) | TIM_EGR_UG, &gpt1_regs_ptr->egr); + + /* Reset the timer */ + lastdec = READ_TIMER(); + timestamp = 0; + + return 0; +} + +/* + * timer without interrupts + */ +ulong get_timer(ulong base) +{ + return (get_timer_masked() / GPT_RESOLUTION) - base; +} + +void __udelay(unsigned long usec) +{ + ulong tmo; + ulong start = get_timer_masked(); + ulong tenudelcnt = CONFIG_SYS_HZ_CLOCK / (1000 * 100); + ulong rndoff; + + rndoff = (usec % 10) ? 1 : 0; + + /* tenudelcnt timer tick gives 10 microsecconds delay */ + tmo = ((usec / 10) + rndoff) * tenudelcnt; + + while ((ulong) (get_timer_masked() - start) < tmo) + ; +} + +ulong get_timer_masked(void) +{ + ulong now = READ_TIMER(); + + if (now >= lastdec) { + /* normal mode */ + timestamp += now - lastdec; + } else { + /* we have an overflow ... */ + timestamp += now + GPT_FREE_RUNNING - lastdec; + } + lastdec = now; + + return timestamp; +} + +void udelay_masked(unsigned long usec) +{ + return udelay(usec); +} + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On ARM it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return get_timer(0); +} + +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On ARM it returns the number of timer ticks per second. + */ +ulong get_tbclk(void) +{ + return CONFIG_STM32_HZ; +} |