};
#define STM32_BUS_MASK 0xFFFF0000
+struct stm32_rcc_regs {
+ u32 cr; /* RCC clock control */
+ u32 pllcfgr; /* RCC PLL configuration */
+ u32 cfgr; /* RCC clock configuration */
+ u32 cir; /* RCC clock interrupt */
+ u32 ahb1rstr; /* RCC AHB1 peripheral reset */
+ u32 ahb2rstr; /* RCC AHB2 peripheral reset */
+ u32 ahb3rstr; /* RCC AHB3 peripheral reset */
+ u32 rsv0;
+ u32 apb1rstr; /* RCC APB1 peripheral reset */
+ u32 apb2rstr; /* RCC APB2 peripheral reset */
+ u32 rsv1[2];
+ u32 ahb1enr; /* RCC AHB1 peripheral clock enable */
+ u32 ahb2enr; /* RCC AHB2 peripheral clock enable */
+ u32 ahb3enr; /* RCC AHB3 peripheral clock enable */
+ u32 rsv2;
+ u32 apb1enr; /* RCC APB1 peripheral clock enable */
+ u32 apb2enr; /* RCC APB2 peripheral clock enable */
+ u32 rsv3[2];
+ u32 ahb1lpenr; /* RCC AHB1 periph clk enable in low pwr mode */
+ u32 ahb2lpenr; /* RCC AHB2 periph clk enable in low pwr mode */
+ u32 ahb3lpenr; /* RCC AHB3 periph clk enable in low pwr mode */
+ u32 rsv4;
+ u32 apb1lpenr; /* RCC APB1 periph clk enable in low pwr mode */
+ u32 apb2lpenr; /* RCC APB2 periph clk enable in low pwr mode */
+ u32 rsv5[2];
+ u32 bdcr; /* RCC Backup domain control */
+ u32 csr; /* RCC clock control & status */
+ u32 rsv6[2];
+ u32 sscgr; /* RCC spread spectrum clock generation */
+ u32 plli2scfgr; /* RCC PLLI2S configuration */
+ u32 pllsaicfgr;
+ u32 dckcfgr;
+};
+#define STM32_RCC ((struct stm32_rcc_regs *)RCC_BASE)
+
+struct stm32_pwr_regs {
+ u32 cr1; /* power control register 1 */
+ u32 csr1; /* power control/status register 2 */
+ u32 cr2; /* power control register 2 */
+ u32 csr2; /* power control/status register 2 */
+};
+#define STM32_PWR ((struct stm32_pwr_regs *)PWR_BASE)
+
int configure_clocks(void);
+unsigned long clock_get(enum clock clck);
+void stm32_flash_latency_cfg(int latency);
#endif /* _ASM_ARCH_HARDWARE_H */
#include <asm/arch/stm32.h>
#include <asm/arch/stm32_periph.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_PLLCFGR_PLLM_MASK 0x3F
+#define RCC_PLLCFGR_PLLN_MASK 0x7FC0
+#define RCC_PLLCFGR_PLLP_MASK 0x30000
+#define RCC_PLLCFGR_PLLQ_MASK 0xF000000
+#define RCC_PLLCFGR_PLLSRC (1 << 22)
+#define RCC_PLLCFGR_PLLM_SHIFT 0
+#define RCC_PLLCFGR_PLLN_SHIFT 6
+#define RCC_PLLCFGR_PLLP_SHIFT 16
+#define RCC_PLLCFGR_PLLQ_SHIFT 24
+
+#define RCC_CFGR_AHB_PSC_MASK 0xF0
+#define RCC_CFGR_APB1_PSC_MASK 0x1C00
+#define RCC_CFGR_APB2_PSC_MASK 0xE000
+#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 10
+#define RCC_CFGR_PPRE2_SHIFT 13
+
+#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)
+
+/*
+ * Offsets of some PWR registers
+ */
+#define PWR_CR1_ODEN (1 << 16)
+#define PWR_CR1_ODSWEN (1 << 17)
+#define PWR_CSR1_ODRDY (1 << 16)
+#define PWR_CSR1_ODSWRDY (1 << 17)
+
+
+/*
+ * 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)
+
+struct pll_psc {
+ u8 pll_m;
+ u16 pll_n;
+ u8 pll_p;
+ u8 pll_q;
+ 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 == 25000000)
+#if (CONFIG_SYS_CLK_FREQ == 200000000)
+/* 200 MHz */
+struct pll_psc sys_pll_psc = {
+ .pll_m = 25,
+ .pll_n = 400,
+ .pll_p = 2,
+ .pll_q = 8,
+ .ahb_psc = AHB_PSC_1,
+ .apb1_psc = APB_PSC_4,
+ .apb2_psc = APB_PSC_2
+};
+#endif
+#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));
+ writel(0x24003010, &STM32_RCC->pllcfgr); /* Reset value from RM */
+ 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))
+ ;
+
+ setbits_le32(&STM32_RCC->cfgr, ((
+ sys_pll_psc.ahb_psc << RCC_CFGR_HPRE_SHIFT)
+ | (sys_pll_psc.apb1_psc << RCC_CFGR_PPRE1_SHIFT)
+ | (sys_pll_psc.apb2_psc << RCC_CFGR_PPRE2_SHIFT)));
+
+ /* Configure the main PLL */
+ uint32_t pllcfgr = 0;
+ pllcfgr = RCC_PLLCFGR_PLLSRC; /* pll source HSE */
+ pllcfgr |= sys_pll_psc.pll_m << RCC_PLLCFGR_PLLM_SHIFT;
+ pllcfgr |= sys_pll_psc.pll_n << RCC_PLLCFGR_PLLN_SHIFT;
+ pllcfgr |= ((sys_pll_psc.pll_p >> 1) - 1) << RCC_PLLCFGR_PLLP_SHIFT;
+ pllcfgr |= sys_pll_psc.pll_q << RCC_PLLCFGR_PLLQ_SHIFT;
+ writel(pllcfgr, &STM32_RCC->pllcfgr);
+
+ /* Enable the main PLL */
+ setbits_le32(&STM32_RCC->cr, RCC_CR_PLLON);
+ while (!(readl(&STM32_RCC->cr) & RCC_CR_PLLRDY))
+ ;
+
+ /* Enable high performance mode, System frequency up to 200 MHz */
+ setbits_le32(&STM32_RCC->apb1enr, RCC_APB1ENR_PWREN);
+ setbits_le32(&STM32_PWR->cr1, PWR_CR1_ODEN);
+ /* Infinite wait! */
+ while (!(readl(&STM32_PWR->csr1) & PWR_CSR1_ODRDY))
+ ;
+ /* Enable the Over-drive switch */
+ setbits_le32(&STM32_PWR->cr1, PWR_CR1_ODSWEN);
+ /* Infinite wait! */
+ while (!(readl(&STM32_PWR->csr1) & PWR_CSR1_ODSWRDY))
+ ;
+
+ stm32_flash_latency_cfg(5);
+ 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;
+ /* 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 pllm, plln, pllp;
+ pllm = (readl(&STM32_RCC->pllcfgr) & RCC_PLLCFGR_PLLM_MASK);
+ plln = ((readl(&STM32_RCC->pllcfgr) & RCC_PLLCFGR_PLLN_MASK)
+ >> RCC_PLLCFGR_PLLN_SHIFT);
+ pllp = ((((readl(&STM32_RCC->pllcfgr) & RCC_PLLCFGR_PLLP_MASK)
+ >> RCC_PLLCFGR_PLLP_SHIFT) + 1) << 1);
+ sysclk = ((CONFIG_STM32_HSE_HZ / pllm) * plln) / pllp;
+ }
+
+ 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;
+ }
+}
+
+
void clock_setup(int peripheral)
{
switch (peripheral) {
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