common/image.c currently implicitly depends on CONFIG_NR_DRAM_BANKS when CONFIG_ARM is enabled. Make this requirement explicit.

Signed-off-by: Matt Porter mporter@konsulko.com --- common/image.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/image.c b/common/image.c index 162b682..73c24f5 100644 --- a/common/image.c +++ b/common/image.c @@ -461,7 +461,7 @@ phys_size_t getenv_bootm_size(void) tmp = 0;

-#if defined(CONFIG_ARM) +#if defined(CONFIG_ARM) && defined(CONFIG_NR_DRAM_BANKS) return gd->bd->bi_dram[0].size - tmp; #else return gd->bd->bi_memsize - tmp;

On ARM v7M, the processor will return to ARM mode when executing a blx instruction with bit 0 of the address == 0. Always set it to 1 to stay in thumb mode.

Signed-off-by: Matt Porter mporter@konsulko.com --- v3: - Implement using an override of the weak do_go_exec() when building for ARMv7-M.

arch/arm/lib/Makefile | 1 + arch/arm/lib/cmd_boot.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 arch/arm/lib/cmd_boot.c

diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 8288d2f..4c95a77 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -26,6 +26,7 @@ ifndef CONFIG_SYS_GENERIC_BOARD obj-y += board.o endif

+obj-$(CONFIG_CPU_V7M) += cmd_boot.o obj-$(CONFIG_OF_LIBFDT) += bootm-fdt.o obj-$(CONFIG_CMD_BOOTM) += bootm.o obj-$(CONFIG_SYS_L2_PL310) += cache-pl310.o diff --git a/arch/arm/lib/cmd_boot.c b/arch/arm/lib/cmd_boot.c new file mode 100644 index 0000000..37bb6a5 --- /dev/null +++ b/arch/arm/lib/cmd_boot.c @@ -0,0 +1,44 @@ +/* + * (C) Copyright 2008-2011 + * Graeme Russ, graeme.russ@gmail.com + * + * (C) Copyright 2002 + * Daniel Engström, Omicron Ceti AB, daniel@omicron.se + * + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger mgroeger@sysgo.de + * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * ARMv7M does not support ARM instruction mode. However, the + * interworking BLX and BX instructions do encode the ARM/Thumb + * field in bit 0. This means that when executing any Branch + * and eXchange instruction we must set bit 0 to one to guarantee + * that we keep the processor in Thumb instruction mode. From The + * ARMv7-M Instruction Set A4.1.1: + * "ARMv7-M only supports the Thumb instruction execution state, + * therefore the value of address bit [0] must be 1 in interworking + * instructions, otherwise a fault occurs." + */ +unsigned long do_go_exec(ulong (*entry)(int, char * const []), + int argc, char * const argv[]) +{ + ulong addr = (ulong)entry | 1; + entry = (void *)addr; + + return entry(argc, argv); +}

Add ARMv7M STM32F1 support including clocks, timer, gpio, and flash.

Signed-off-by: Matt Porter mporter@konsulko.com --- v3: - Update copyright notices

arch/arm/cpu/armv7m/Makefile | 1 + arch/arm/cpu/armv7m/stm32f1/Makefile | 14 +++ arch/arm/cpu/armv7m/stm32f1/clock.c | 196 ++++++++++++++++++++++++++++++ arch/arm/cpu/armv7m/stm32f1/flash.c | 180 +++++++++++++++++++++++++++ arch/arm/cpu/armv7m/stm32f1/soc.c | 36 ++++++ arch/arm/cpu/armv7m/stm32f1/timer.c | 121 ++++++++++++++++++ arch/arm/include/asm/arch-stm32f1/gpio.h | 118 ++++++++++++++++++ arch/arm/include/asm/arch-stm32f1/stm32.h | 116 ++++++++++++++++++ include/flash.h | 1 + 9 files changed, 783 insertions(+) create mode 100644 arch/arm/cpu/armv7m/stm32f1/Makefile create mode 100644 arch/arm/cpu/armv7m/stm32f1/clock.c create mode 100644 arch/arm/cpu/armv7m/stm32f1/flash.c create mode 100644 arch/arm/cpu/armv7m/stm32f1/soc.c create mode 100644 arch/arm/cpu/armv7m/stm32f1/timer.c create mode 100644 arch/arm/include/asm/arch-stm32f1/gpio.h create mode 100644 arch/arm/include/asm/arch-stm32f1/stm32.h

diff --git a/arch/arm/cpu/armv7m/Makefile b/arch/arm/cpu/armv7m/Makefile index b662e03..93a1956 100644 --- a/arch/arm/cpu/armv7m/Makefile +++ b/arch/arm/cpu/armv7m/Makefile @@ -8,4 +8,5 @@ extra-y := start.o obj-y += cpu.o

+obj-$(CONFIG_STM32F1) += stm32f1/ obj-$(CONFIG_STM32F4) += stm32f4/ diff --git a/arch/arm/cpu/armv7m/stm32f1/Makefile b/arch/arm/cpu/armv7m/stm32f1/Makefile new file mode 100644 index 0000000..4faf435 --- /dev/null +++ b/arch/arm/cpu/armv7m/stm32f1/Makefile @@ -0,0 +1,14 @@ +# +# (C) Copyright 2000-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# (C) Copyright 2015 +# Kamil Lulko, rev13@wp.pl +# +# Copyright 2015 ATS Advanced Telematics Systems GmbH +# Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += soc.o clock.o timer.o flash.o diff --git a/arch/arm/cpu/armv7m/stm32f1/clock.c b/arch/arm/cpu/armv7m/stm32f1/clock.c new file mode 100644 index 0000000..acad116 --- /dev/null +++ b/arch/arm/cpu/armv7m/stm32f1/clock.c @@ -0,0 +1,196 @@ +/* + * (C) Copyright 2015 + * Kamil Lulko, rev13@wp.pl + * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * + * (C) Copyright 2014 + * STMicroelectronics + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/stm32.h> + +#define RCC_CR_HSION (1 << 0) +#define RCC_CR_HSEON (1 << 16) +#define RCC_CR_HSERDY (1 << 17) +#define RCC_CR_HSEBYP (1 << 18) +#define RCC_CR_CSSON (1 << 19) +#define RCC_CR_PLLON (1 << 24) +#define RCC_CR_PLLRDY (1 << 25) + +#define RCC_CFGR_PLLMUL_MASK 0x3C0000 +#define RCC_CFGR_PLLMUL_SHIFT 18 +#define RCC_CFGR_PLLSRC_HSE (1 << 16) + +#define RCC_CFGR_AHB_PSC_MASK 0xF0 +#define RCC_CFGR_APB1_PSC_MASK 0x700 +#define RCC_CFGR_APB2_PSC_MASK 0x3800 +#define RCC_CFGR_SW0 (1 << 0) +#define RCC_CFGR_SW1 (1 << 1) +#define RCC_CFGR_SW_MASK 0x3 +#define RCC_CFGR_SW_HSI 0 +#define RCC_CFGR_SW_HSE RCC_CFGR_SW0 +#define RCC_CFGR_SW_PLL RCC_CFGR_SW1 +#define RCC_CFGR_SWS0 (1 << 2) +#define RCC_CFGR_SWS1 (1 << 3) +#define RCC_CFGR_SWS_MASK 0xC +#define RCC_CFGR_SWS_HSI 0 +#define RCC_CFGR_SWS_HSE RCC_CFGR_SWS0 +#define RCC_CFGR_SWS_PLL RCC_CFGR_SWS1 +#define RCC_CFGR_HPRE_SHIFT 4 +#define RCC_CFGR_PPRE1_SHIFT 8 +#define RCC_CFGR_PPRE2_SHIFT 11 + +#define RCC_APB1ENR_PWREN (1 << 28) + +#define PWR_CR_VOS0 (1 << 14) +#define PWR_CR_VOS1 (1 << 15) +#define PWR_CR_VOS_MASK 0xC000 +#define PWR_CR_VOS_SCALE_MODE_1 (PWR_CR_VOS0 | PWR_CR_VOS1) +#define PWR_CR_VOS_SCALE_MODE_2 (PWR_CR_VOS1) +#define PWR_CR_VOS_SCALE_MODE_3 (PWR_CR_VOS0) + +#define FLASH_ACR_WS(n) n +#define FLASH_ACR_PRFTEN (1 << 8) +#define FLASH_ACR_ICEN (1 << 9) +#define FLASH_ACR_DCEN (1 << 10) + +struct psc { + u8 ahb_psc; + u8 apb1_psc; + u8 apb2_psc; +}; + +#define AHB_PSC_1 0 +#define AHB_PSC_2 0x8 +#define AHB_PSC_4 0x9 +#define AHB_PSC_8 0xA +#define AHB_PSC_16 0xB +#define AHB_PSC_64 0xC +#define AHB_PSC_128 0xD +#define AHB_PSC_256 0xE +#define AHB_PSC_512 0xF + +#define APB_PSC_1 0 +#define APB_PSC_2 0x4 +#define APB_PSC_4 0x5 +#define APB_PSC_8 0x6 +#define APB_PSC_16 0x7 + +#if !defined(CONFIG_STM32_HSE_HZ) +#error "CONFIG_STM32_HSE_HZ not defined!" +#else +#if (CONFIG_STM32_HSE_HZ == 8000000) +#define RCC_CFGR_PLLMUL_CFG 0x7 +struct psc psc_hse = { + .ahb_psc = AHB_PSC_1, + .apb1_psc = APB_PSC_2, + .apb2_psc = APB_PSC_1 +}; +#else +#error "No PLL/Prescaler configuration for given CONFIG_STM32_HSE_HZ exists" +#endif +#endif + +int configure_clocks(void) +{ + /* Reset RCC configuration */ + setbits_le32(&STM32_RCC->cr, RCC_CR_HSION); + writel(0, &STM32_RCC->cfgr); /* Reset CFGR */ + clrbits_le32(&STM32_RCC->cr, (RCC_CR_HSEON | RCC_CR_CSSON + | RCC_CR_PLLON)); + clrbits_le32(&STM32_RCC->cr, RCC_CR_HSEBYP); + writel(0, &STM32_RCC->cir); /* Disable all interrupts */ + + /* Configure for HSE+PLL operation */ + setbits_le32(&STM32_RCC->cr, RCC_CR_HSEON); + while (!(readl(&STM32_RCC->cr) & RCC_CR_HSERDY)) + ; + + /* Enable high performance mode, System frequency up to 168 MHz */ + setbits_le32(&STM32_RCC->apb1enr, RCC_APB1ENR_PWREN); + writel(PWR_CR_VOS_SCALE_MODE_1, &STM32_PWR->cr); + + setbits_le32(&STM32_RCC->cfgr, + RCC_CFGR_PLLMUL_CFG << RCC_CFGR_PLLMUL_SHIFT); + setbits_le32(&STM32_RCC->cfgr, RCC_CFGR_PLLSRC_HSE); + setbits_le32(&STM32_RCC->cfgr, (( + psc_hse.ahb_psc << RCC_CFGR_HPRE_SHIFT) + | (psc_hse.apb1_psc << RCC_CFGR_PPRE1_SHIFT) + | (psc_hse.apb2_psc << RCC_CFGR_PPRE2_SHIFT))); + + setbits_le32(&STM32_RCC->cr, RCC_CR_PLLON); + + while (!(readl(&STM32_RCC->cr) & RCC_CR_PLLRDY)) + ; + + /* 5 wait states, Prefetch enabled, D-Cache enabled, I-Cache enabled */ + writel(FLASH_ACR_WS(5) | FLASH_ACR_PRFTEN | FLASH_ACR_ICEN + | FLASH_ACR_DCEN, &STM32_FLASH->acr); + + clrbits_le32(&STM32_RCC->cfgr, (RCC_CFGR_SW0 | RCC_CFGR_SW1)); + setbits_le32(&STM32_RCC->cfgr, RCC_CFGR_SW_PLL); + + while ((readl(&STM32_RCC->cfgr) & RCC_CFGR_SWS_MASK) != + RCC_CFGR_SWS_PLL) + ; + + return 0; +} + +unsigned long clock_get(enum clock clck) +{ + u32 sysclk = 0; + u32 shift = 0; + /* PLL table lookups for clock computation */ + u8 pll_mul_table[16] = { + 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16 + }; + /* Prescaler table lookups for clock computation */ + u8 ahb_psc_table[16] = { + 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9 + }; + u8 apb_psc_table[8] = { + 0, 0, 0, 0, 1, 2, 3, 4 + }; + + if ((readl(&STM32_RCC->cfgr) & RCC_CFGR_SWS_MASK) == + RCC_CFGR_SWS_PLL) { + u16 pll; + pll = ((readl(&STM32_RCC->cfgr) & RCC_CFGR_PLLMUL_MASK) + >> RCC_CFGR_PLLMUL_SHIFT); + sysclk = CONFIG_STM32_HSE_HZ * pll_mul_table[pll]; + } + + switch (clck) { + case CLOCK_CORE: + return sysclk; + break; + case CLOCK_AHB: + shift = ahb_psc_table[( + (readl(&STM32_RCC->cfgr) & RCC_CFGR_AHB_PSC_MASK) + >> RCC_CFGR_HPRE_SHIFT)]; + return sysclk >>= shift; + break; + case CLOCK_APB1: + shift = apb_psc_table[( + (readl(&STM32_RCC->cfgr) & RCC_CFGR_APB1_PSC_MASK) + >> RCC_CFGR_PPRE1_SHIFT)]; + return sysclk >>= shift; + break; + case CLOCK_APB2: + shift = apb_psc_table[( + (readl(&STM32_RCC->cfgr) & RCC_CFGR_APB2_PSC_MASK) + >> RCC_CFGR_PPRE2_SHIFT)]; + return sysclk >>= shift; + break; + default: + return 0; + break; + } +} diff --git a/arch/arm/cpu/armv7m/stm32f1/flash.c b/arch/arm/cpu/armv7m/stm32f1/flash.c new file mode 100644 index 0000000..bb88f23 --- /dev/null +++ b/arch/arm/cpu/armv7m/stm32f1/flash.c @@ -0,0 +1,180 @@ +/* + * (C) Copyright 2015 + * Kamil Lulko, rev13@wp.pl + * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/stm32.h> + +#define STM32_FLASH_KEY1 0x45670123 +#define STM32_FLASH_KEY2 0xcdef89ab + +#define STM32_NUM_BANKS 2 +#define STM32_MAX_BANK 0x200 + +flash_info_t flash_info[STM32_NUM_BANKS]; +static struct stm32_flash_bank_regs *flash_bank[STM32_NUM_BANKS]; + +static void stm32f1_flash_lock(u8 bank, u8 lock) +{ + if (lock) { + setbits_le32(&flash_bank[bank]->cr, STM32_FLASH_CR_LOCK); + } else { + writel(STM32_FLASH_KEY1, &flash_bank[bank]->keyr); + writel(STM32_FLASH_KEY2, &flash_bank[bank]->keyr); + } +} + +/* Only XL devices are supported (2 KiB sector size) */ +unsigned long flash_init(void) +{ + u8 i, banks; + u16 j, size; + + /* Set up accessors for XL devices with wonky register layout */ + flash_bank[0] = (struct stm32_flash_bank_regs *)&STM32_FLASH->keyr; + flash_bank[1] = (struct stm32_flash_bank_regs *)&STM32_FLASH->keyr2; + + /* + * Get total flash size (in KiB) and configure number of banks + * present and sector count per bank. + */ + size = readw(&STM32_DES->flash_size); + if (size <= STM32_MAX_BANK) { + banks = 1; + flash_info[0].sector_count = size >> 1; + } else if (size > STM32_MAX_BANK) { + banks = 2; + flash_info[0].sector_count = STM32_MAX_BANK >> 1; + flash_info[1].sector_count = (size - STM32_MAX_BANK) >> 1; + } + + /* Configure start/size for all sectors */ + for (i = 0; i < banks; i++) { + flash_info[i].flash_id = FLASH_STM32F1; + flash_info[i].start[0] = CONFIG_SYS_FLASH_BASE + (i << 19); + flash_info[i].size = 2048; + for (j = 1; (j < flash_info[i].sector_count); j++) { + flash_info[i].start[j] = flash_info[i].start[j - 1] + + 2048; + flash_info[i].size += 2048; + } + } + + return size << 10; +} + +void flash_print_info(flash_info_t *info) +{ + int i; + + if (info->flash_id == FLASH_UNKNOWN) { + printf("Missing or unknown FLASH type\n"); + return; + } else if (info->flash_id == FLASH_STM32F1) { + printf("STM32F1 Embedded Flash\n"); + } + + printf(" Size: %ld MB in %d Sectors\n", + info->size >> 10, info->sector_count); + + printf(" Sector Start Addresses:"); + for (i = 0; i < info->sector_count; ++i) { + if ((i % 5) == 0) + printf("\n "); + printf(" %08lX%s", + info->start[i], + info->protect[i] ? " (RO)" : " "); + } + printf("\n"); + return; +} + +int flash_erase(flash_info_t *info, int first, int last) +{ + u8 bank = 0xff; + int i; + + for (i = 0; i < STM32_NUM_BANKS; i++) { + if (info == &flash_info[i]) { + bank = i; + break; + } + } + if (bank == 0xff) + return -1; + + stm32f1_flash_lock(bank, 0); + + for (i = first; i <= last; i++) { + while (readl(&flash_bank[bank]->sr) & STM32_FLASH_SR_BSY) + ; + + setbits_le32(&flash_bank[bank]->cr, STM32_FLASH_CR_PER); + + writel(info->start[i], &flash_bank[bank]->ar); + + setbits_le32(&flash_bank[bank]->cr, STM32_FLASH_CR_STRT); + + while (readl(&flash_bank[bank]->sr) & STM32_FLASH_SR_BSY) + ; + } + + clrbits_le32(&flash_bank[bank]->cr, STM32_FLASH_CR_PER); + + stm32f1_flash_lock(bank, 1); + + return 0; +} + +int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + ulong i; + u8 bank = 0xff; + + if (addr & 1) { + printf("Flash address must be half word aligned\n"); + return -1; + } + + if (cnt & 1) { + printf("Flash length must be half word aligned\n"); + return -1; + } + + for (i = 0; i < 2; i++) { + if (info == &flash_info[i]) { + bank = i; + break; + } + } + + if (bank == 0xff) + return -1; + + while (readl(&flash_bank[bank]->sr) & STM32_FLASH_SR_BSY) + ; + + stm32f1_flash_lock(bank, 0); + + setbits_le32(&flash_bank[bank]->cr, STM32_FLASH_CR_PG); + + /* STM32F1 requires half word writes */ + for (i = 0; i < cnt >> 1; i++) { + *(u16 *)(addr + i * 2) = ((u16 *)src)[i]; + while (readl(&flash_bank[bank]->sr) & STM32_FLASH_SR_BSY) + ; + } + + clrbits_le32(&flash_bank[bank]->cr, STM32_FLASH_CR_PG); + + stm32f1_flash_lock(bank, 1); + + return 0; +} diff --git a/arch/arm/cpu/armv7m/stm32f1/soc.c b/arch/arm/cpu/armv7m/stm32f1/soc.c new file mode 100644 index 0000000..8275ad7 --- /dev/null +++ b/arch/arm/cpu/armv7m/stm32f1/soc.c @@ -0,0 +1,36 @@ +/* + * (C) Copyright 2015 + * Kamil Lulko, rev13@wp.pl + * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/armv7m.h> +#include <asm/arch/stm32.h> + +u32 get_cpu_rev(void) +{ + return 0; +} + +int arch_cpu_init(void) +{ + configure_clocks(); + + /* + * Configure the memory protection unit (MPU) to allow full access to + * the whole 4GB address space. + */ + writel(0, &V7M_MPU->rnr); + writel(0, &V7M_MPU->rbar); + writel((V7M_MPU_RASR_AP_RW_RW | V7M_MPU_RASR_SIZE_4GB + | V7M_MPU_RASR_EN), &V7M_MPU->rasr); + writel(V7M_MPU_CTRL_ENABLE | V7M_MPU_CTRL_HFNMIENA, &V7M_MPU->ctrl); + + return 0; +} diff --git a/arch/arm/cpu/armv7m/stm32f1/timer.c b/arch/arm/cpu/armv7m/stm32f1/timer.c new file mode 100644 index 0000000..c6292b5 --- /dev/null +++ b/arch/arm/cpu/armv7m/stm32f1/timer.c @@ -0,0 +1,121 @@ +/* + * (C) Copyright 2015 + * Kamil Lulko, rev13@wp.pl + * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/armv7m.h> +#include <asm/arch/stm32.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define STM32_TIM2_BASE (STM32_APB1PERIPH_BASE + 0x0000) + +#define RCC_APB1ENR_TIM2EN (1 << 0) + +struct stm32_tim2_5 { + 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 reserved1; + u32 ccr1; + u32 ccr2; + u32 ccr3; + u32 ccr4; + u32 reserved2; + u32 dcr; + u32 dmar; + u32 or; +}; + +#define TIM_CR1_CEN (1 << 0) + +#define TIM_EGR_UG (1 << 0) + +int timer_init(void) +{ + struct stm32_tim2_5 *tim = (struct stm32_tim2_5 *)STM32_TIM2_BASE; + + setbits_le32(&STM32_RCC->apb1enr, RCC_APB1ENR_TIM2EN); + + if (clock_get(CLOCK_AHB) == clock_get(CLOCK_APB1)) + writel((clock_get(CLOCK_APB1) / CONFIG_SYS_HZ_CLOCK) - 1, + &tim->psc); + else + writel(((clock_get(CLOCK_APB1) * 2) / CONFIG_SYS_HZ_CLOCK) - 1, + &tim->psc); + + writel(0xFFFFFFFF, &tim->arr); + writel(TIM_CR1_CEN, &tim->cr1); + setbits_le32(&tim->egr, TIM_EGR_UG); + + gd->arch.tbl = 0; + gd->arch.tbu = 0; + gd->arch.lastinc = 0; + + return 0; +} + +ulong get_timer(ulong base) +{ + return (get_ticks() / (CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ)) - base; +} + +unsigned long long get_ticks(void) +{ + struct stm32_tim2_5 *tim = (struct stm32_tim2_5 *)STM32_TIM2_BASE; + u32 now; + + now = readl(&tim->cnt); + + if (now >= gd->arch.lastinc) + gd->arch.tbl += (now - gd->arch.lastinc); + else + gd->arch.tbl += (0xFFFFFFFF - gd->arch.lastinc) + now; + + gd->arch.lastinc = now; + + return gd->arch.tbl; +} + +void reset_timer(void) +{ + struct stm32_tim2_5 *tim = (struct stm32_tim2_5 *)STM32_TIM2_BASE; + + gd->arch.lastinc = readl(&tim->cnt); + gd->arch.tbl = 0; +} + +/* delay x useconds */ +void __udelay(ulong usec) +{ + unsigned long long start; + + start = get_ticks(); /* get current timestamp */ + while ((get_ticks() - start) < usec) + ; /* loop till time has passed */ +} + +/* + * 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_SYS_HZ_CLOCK; +} diff --git a/arch/arm/include/asm/arch-stm32f1/gpio.h b/arch/arm/include/asm/arch-stm32f1/gpio.h new file mode 100644 index 0000000..6976e1f --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f1/gpio.h @@ -0,0 +1,118 @@ +/* + * (C) Copyright 2011 + * Yuri Tikhonov, Emcraft Systems, yur@emcraft.com + * + * (C) Copyright 2015 + * Kamil Lulko, rev13@wp.pl + * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.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, +}; + +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_icnf { + STM32_GPIO_ICNF_AN = 0, + STM32_GPIO_ICNF_IN_FLT, + STM32_GPIO_ICNF_IN_PUD, + STM32_GPIO_ICNF_RSVD +}; + +enum stm32_gpio_ocnf { + STM32_GPIO_OCNF_GP_PP = 0, + STM32_GPIO_OCNF_GP_OD, + STM32_GPIO_OCNF_AF_PP, + STM32_GPIO_OCNF_AF_OD +}; + +enum stm32_gpio_pupd { + STM32_GPIO_PUPD_DOWN = 0, + STM32_GPIO_PUPD_UP, +}; + +enum stm32_gpio_mode { + STM32_GPIO_MODE_IN = 0, + STM32_GPIO_MODE_OUT_10M, + STM32_GPIO_MODE_OUT_2M, + STM32_GPIO_MODE_OUT_50M +}; + +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_icnf icnf; + enum stm32_gpio_ocnf ocnf; + enum stm32_gpio_mode mode; + 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-stm32f1/stm32.h b/arch/arm/include/asm/arch-stm32f1/stm32.h new file mode 100644 index 0000000..686cb4f --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f1/stm32.h @@ -0,0 +1,116 @@ +/* + * (C) Copyright 2011 + * Yuri Tikhonov, Emcraft Systems, yur@emcraft.com + * + * (C) Copyright 2015 + * Kamil Lulko, rev13@wp.pl + * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _MACH_STM32_H_ +#define _MACH_STM32_H_ + +/* + * Peripheral memory map + */ +#define STM32_PERIPH_BASE 0x40000000 +#define STM32_APB1PERIPH_BASE (STM32_PERIPH_BASE + 0x00000000) +#define STM32_APB2PERIPH_BASE (STM32_PERIPH_BASE + 0x00010000) +#define STM32_AHB1PERIPH_BASE (STM32_PERIPH_BASE + 0x00018000) + +#define STM32_BUS_MASK 0xFFFF0000 + +/* + * Register maps + */ +struct stm32_des_regs { + u16 flash_size; + u16 pad1; + u32 pad2; + u32 uid0; + u32 uid1; + u32 uid2; +}; + +struct stm32_rcc_regs { + u32 cr; /* RCC clock control */ + u32 cfgr; /* RCC clock configuration */ + u32 cir; /* RCC clock interrupt */ + u32 apb2rstr; /* RCC APB2 peripheral reset */ + u32 apb1rstr; /* RCC APB1 peripheral reset */ + u32 ahbenr; /* RCC AHB peripheral clock enable */ + u32 apb2enr; /* RCC APB2 peripheral clock enable */ + u32 apb1enr; /* RCC APB1 peripheral clock enable */ + u32 bdcr; /* RCC Backup domain control */ + u32 csr; /* RCC clock control & status */ +}; + +struct stm32_pwr_regs { + u32 cr; + u32 csr; +}; + +struct stm32_flash_regs { + u32 acr; + u32 keyr; + u32 optkeyr; + u32 sr; + u32 cr; + u32 ar; + u32 rsvd1; /* Reserved */ + u32 obr; + u32 wrpr; + u32 rsvd2[8]; /* Reserved */ + u32 keyr2; + u32 rsvd3; + u32 sr2; + u32 cr2; + u32 ar2; +}; + +/* Per bank register set for XL devices */ +struct stm32_flash_bank_regs { + u32 keyr; + u32 rsvd; /* Reserved */ + u32 sr; + u32 cr; + u32 ar; +}; + +/* + * Registers access macros + */ +#define STM32_DES_BASE (0x1ffff7e0) +#define STM32_DES ((struct stm32_des_regs *)STM32_DES_BASE) + +#define STM32_RCC_BASE (STM32_AHB1PERIPH_BASE + 0x9000) +#define STM32_RCC ((struct stm32_rcc_regs *)STM32_RCC_BASE) + +#define STM32_PWR_BASE (STM32_APB1PERIPH_BASE + 0x7000) +#define STM32_PWR ((struct stm32_pwr_regs *)STM32_PWR_BASE) + +#define STM32_FLASH_BASE (STM32_AHB1PERIPH_BASE + 0xa000) +#define STM32_FLASH ((struct stm32_flash_regs *)STM32_FLASH_BASE) + +#define STM32_FLASH_SR_BSY (1 << 0) + +#define STM32_FLASH_CR_PG (1 << 0) +#define STM32_FLASH_CR_PER (1 << 1) +#define STM32_FLASH_CR_STRT (1 << 6) +#define STM32_FLASH_CR_LOCK (1 << 7) + +enum clock { + CLOCK_CORE, + CLOCK_AHB, + CLOCK_APB1, + CLOCK_APB2 +}; + +int configure_clocks(void); +unsigned long clock_get(enum clock clck); + +#endif /* _MACH_STM32_H_ */ diff --git a/include/flash.h b/include/flash.h index 48aa3a5..5754cf9 100644 --- a/include/flash.h +++ b/include/flash.h @@ -460,6 +460,7 @@ extern flash_info_t *flash_get_info(ulong base); #define FLASH_S29GL128N 0x00F1 /* Spansion S29GL128N */

#define FLASH_STM32F4 0x00F2 /* STM32F4 Embedded Flash */ +#define FLASH_STM32F1 0x00F3 /* STM32F1 Embedded Flash */

#define FLASH_UNKNOWN 0xFFFF /* unknown flash type */

Add support for the STM32F1 family to the STM32 gpio driver.

Signed-off-by: Matt Porter mporter@konsulko.com --- v3: - Update copyright notice v2: - Explicitly check for F4/F1 family and error if not set to a supported STM32 family.

drivers/gpio/stm32_gpio.c | 110 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 109 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/stm32_gpio.c b/drivers/gpio/stm32_gpio.c index d3497e9..86bb19e 100644 --- a/drivers/gpio/stm32_gpio.c +++ b/drivers/gpio/stm32_gpio.c @@ -5,6 +5,9 @@ * (C) Copyright 2015 * Kamil Lulko, rev13@wp.pl * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * * SPDX-License-Identifier: GPL-2.0+ */

@@ -16,6 +19,7 @@

DECLARE_GLOBAL_DATA_PTR;

+#if defined(CONFIG_STM32F4) #define STM32_GPIOA_BASE (STM32_AHB1PERIPH_BASE + 0x0000) #define STM32_GPIOB_BASE (STM32_AHB1PERIPH_BASE + 0x0400) #define STM32_GPIOC_BASE (STM32_AHB1PERIPH_BASE + 0x0800) @@ -90,6 +94,92 @@ int stm32_gpio_config(const struct stm32_gpio_dsc *dsc, out: return rv; } +#elif defined(CONFIG_STM32F1) +#define STM32_GPIOA_BASE (STM32_APB2PERIPH_BASE + 0x0800) +#define STM32_GPIOB_BASE (STM32_APB2PERIPH_BASE + 0x0C00) +#define STM32_GPIOC_BASE (STM32_APB2PERIPH_BASE + 0x1000) +#define STM32_GPIOD_BASE (STM32_APB2PERIPH_BASE + 0x1400) +#define STM32_GPIOE_BASE (STM32_APB2PERIPH_BASE + 0x1800) +#define STM32_GPIOF_BASE (STM32_APB2PERIPH_BASE + 0x1C00) +#define STM32_GPIOG_BASE (STM32_APB2PERIPH_BASE + 0x2000) + +static const unsigned long io_base[] = { + STM32_GPIOA_BASE, STM32_GPIOB_BASE, STM32_GPIOC_BASE, + STM32_GPIOD_BASE, STM32_GPIOE_BASE, STM32_GPIOF_BASE, + STM32_GPIOG_BASE +}; + +#define STM32_GPIO_CR_MODE_MASK 0x3 +#define STM32_GPIO_CR_MODE_SHIFT(p) (p * 4) +#define STM32_GPIO_CR_CNF_MASK 0x3 +#define STM32_GPIO_CR_CNF_SHIFT(p) (p * 4 + 2) + +struct stm32_gpio_regs { + u32 crl; /* GPIO port configuration low */ + u32 crh; /* GPIO port configuration high */ + u32 idr; /* GPIO port input data */ + u32 odr; /* GPIO port output data */ + u32 bsrr; /* GPIO port bit set/reset */ + u32 brr; /* GPIO port bit reset */ + u32 lckr; /* GPIO port configuration lock */ +}; + +#define CHECK_DSC(x) (!x || x->port > 6 || x->pin > 15) +#define CHECK_CTL(x) (!x || x->mode > 3 || x->icnf > 3 || x->ocnf > 3 || \ + x->pupd > 1) + +int stm32_gpio_config(const struct stm32_gpio_dsc *dsc, + const struct stm32_gpio_ctl *ctl) +{ + struct stm32_gpio_regs *gpio_regs; + u32 *cr; + int p, crp; + int rv; + + if (CHECK_DSC(dsc)) { + rv = -EINVAL; + goto out; + } + if (CHECK_CTL(ctl)) { + rv = -EINVAL; + goto out; + } + + p = dsc->pin; + + gpio_regs = (struct stm32_gpio_regs *)io_base[dsc->port]; + + /* Enable clock for GPIO port */ + setbits_le32(&STM32_RCC->apb2enr, 0x04 << dsc->port); + + if (p < 8) { + cr = &gpio_regs->crl; + crp = p; + } else { + cr = &gpio_regs->crh; + crp = p - 8; + } + + clrbits_le32(cr, 0x3 << STM32_GPIO_CR_MODE_SHIFT(crp)); + setbits_le32(cr, ctl->mode << STM32_GPIO_CR_MODE_SHIFT(crp)); + + clrbits_le32(cr, 0x3 << STM32_GPIO_CR_CNF_SHIFT(crp)); + /* Inputs set the optional pull up / pull down */ + if (ctl->mode == STM32_GPIO_MODE_IN) { + setbits_le32(cr, ctl->icnf << STM32_GPIO_CR_CNF_SHIFT(crp)); + clrbits_le32(&gpio_regs->odr, 0x1 << p); + setbits_le32(&gpio_regs->odr, ctl->pupd << p); + } else { + setbits_le32(cr, ctl->ocnf << STM32_GPIO_CR_CNF_SHIFT(crp)); + } + + rv = 0; +out: + return rv; +} +#else +#error STM32 family not supported +#endif

int stm32_gpout_set(const struct stm32_gpio_dsc *dsc, int state) { @@ -148,10 +238,20 @@ int gpio_direction_input(unsigned gpio)

dsc.port = stm32_gpio_to_port(gpio); dsc.pin = stm32_gpio_to_pin(gpio); +#if defined(CONFIG_STM32F4) ctl.af = STM32_GPIO_AF0; ctl.mode = STM32_GPIO_MODE_IN; + ctl.otype = STM32_GPIO_OTYPE_PP; ctl.pupd = STM32_GPIO_PUPD_NO; ctl.speed = STM32_GPIO_SPEED_50M; +#elif defined(CONFIG_STM32F1) + ctl.mode = STM32_GPIO_MODE_IN; + ctl.icnf = STM32_GPIO_ICNF_IN_FLT; + ctl.ocnf = STM32_GPIO_OCNF_GP_PP; /* ignored for input */ + ctl.pupd = STM32_GPIO_PUPD_UP; /* ignored for floating */ +#else +#error STM32 family not supported +#endif

return stm32_gpio_config(&dsc, &ctl); } @@ -164,11 +264,19 @@ int gpio_direction_output(unsigned gpio, int value)

dsc.port = stm32_gpio_to_port(gpio); dsc.pin = stm32_gpio_to_pin(gpio); +#if defined(CONFIG_STM32F4) ctl.af = STM32_GPIO_AF0; ctl.mode = STM32_GPIO_MODE_OUT; - ctl.otype = STM32_GPIO_OTYPE_PP; ctl.pupd = STM32_GPIO_PUPD_NO; ctl.speed = STM32_GPIO_SPEED_50M; +#elif defined(CONFIG_STM32F1) + ctl.mode = STM32_GPIO_MODE_OUT_50M; + ctl.ocnf = STM32_GPIO_OCNF_GP_PP; + ctl.icnf = STM32_GPIO_ICNF_IN_FLT; /* ignored for output */ + ctl.pupd = STM32_GPIO_PUPD_UP; /* ignored for output */ +#else +#error STM32 family not supported +#endif

res = stm32_gpio_config(&dsc, &ctl); if (res < 0)

Add support for the STM32F1 famly to the STM32 serial driver.

Signed-off-by: Matt Porter mporter@konsulko.com --- v3: - Update copyright notice v2: - Explicitly check for F4/F1 family and error if not set to a supported STM32 family.

drivers/serial/serial_stm32.c | 10 ++++++++++ 1 file changed, 10 insertions(+)

diff --git a/drivers/serial/serial_stm32.c b/drivers/serial/serial_stm32.c index 3c80096..2a029ce 100644 --- a/drivers/serial/serial_stm32.c +++ b/drivers/serial/serial_stm32.c @@ -2,6 +2,9 @@ * (C) Copyright 2015 * Kamil Lulko, rev13@wp.pl * + * Copyright 2015 ATS Advanced Telematics Systems GmbH + * Copyright 2015 Konsulko Group, Matt Porter mporter@konsulko.com + * * SPDX-License-Identifier: GPL-2.0+ */

@@ -10,8 +13,15 @@ #include <serial.h> #include <asm/arch/stm32.h>

+#if defined(CONFIG_STM32F4) #define STM32_USART1_BASE (STM32_APB2PERIPH_BASE + 0x1000) #define RCC_APB2ENR_USART1EN (1 << 4) +#elif defined(CONFIG_STM32F1) +#define STM32_USART1_BASE (STM32_APB2PERIPH_BASE + 0x3800) +#define RCC_APB2ENR_USART1EN (1 << 14) +#else +#error STM32 family not supported +#endif

#define USART_BASE STM32_USART1_BASE #define RCC_USART_ENABLE RCC_APB2ENR_USART1EN