diff options
Diffstat (limited to 'arch/arm/cpu/pxa/pxa2xx.c')
| -rw-r--r-- | arch/arm/cpu/pxa/pxa2xx.c | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/arch/arm/cpu/pxa/pxa2xx.c b/arch/arm/cpu/pxa/pxa2xx.c deleted file mode 100644 index c7efb67754e..00000000000 --- a/arch/arm/cpu/pxa/pxa2xx.c +++ /dev/null @@ -1,295 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Alex Zuepke <azu@sysgo.de> - */ - -#include <common.h> -#include <cpu_func.h> -#include <init.h> -#include <irq_func.h> -#include <asm/arch/pxa-regs.h> -#include <asm/cache.h> -#include <asm/io.h> -#include <asm/system.h> -#include <command.h> - -/* Flush I/D-cache */ -static void cache_flush(void) -{ - unsigned long i = 0; - - asm ("mcr p15, 0, %0, c7, c5, 0" : : "r" (i)); -} - -int cleanup_before_linux(void) -{ - /* - * This function is called just before we call Linux. It prepares - * the processor for Linux by just disabling everything that can - * disturb booting Linux. - */ - - disable_interrupts(); - icache_disable(); - dcache_disable(); - cache_flush(); - - return 0; -} - -inline void writelrb(uint32_t val, uint32_t addr) -{ - writel(val, addr); - asm volatile("" : : : "memory"); - readl(addr); - asm volatile("" : : : "memory"); -} - -void pxa2xx_dram_init(void) -{ - uint32_t tmp; - int i; - /* - * 1) Initialize Asynchronous static memory controller - */ - - writelrb(CONFIG_SYS_MSC0_VAL, MSC0); - writelrb(CONFIG_SYS_MSC1_VAL, MSC1); - writelrb(CONFIG_SYS_MSC2_VAL, MSC2); - /* - * 2) Initialize Card Interface - */ - - /* MECR: Memory Expansion Card Register */ - writelrb(CONFIG_SYS_MECR_VAL, MECR); - /* MCMEM0: Card Interface slot 0 timing */ - writelrb(CONFIG_SYS_MCMEM0_VAL, MCMEM0); - /* MCMEM1: Card Interface slot 1 timing */ - writelrb(CONFIG_SYS_MCMEM1_VAL, MCMEM1); - /* MCATT0: Card Interface Attribute Space Timing, slot 0 */ - writelrb(CONFIG_SYS_MCATT0_VAL, MCATT0); - /* MCATT1: Card Interface Attribute Space Timing, slot 1 */ - writelrb(CONFIG_SYS_MCATT1_VAL, MCATT1); - /* MCIO0: Card Interface I/O Space Timing, slot 0 */ - writelrb(CONFIG_SYS_MCIO0_VAL, MCIO0); - /* MCIO1: Card Interface I/O Space Timing, slot 1 */ - writelrb(CONFIG_SYS_MCIO1_VAL, MCIO1); - - /* - * 3) Configure Fly-By DMA register - */ - - writelrb(CONFIG_SYS_FLYCNFG_VAL, FLYCNFG); - - /* - * 4) Initialize Timing for Sync Memory (SDCLK0) - */ - - /* - * Before accessing MDREFR we need a valid DRI field, so we set - * this to power on defaults + DRI field. - */ - - /* Read current MDREFR config and zero out DRI */ - tmp = readl(MDREFR) & ~0xfff; - /* Add user-specified DRI */ - tmp |= CONFIG_SYS_MDREFR_VAL & 0xfff; - /* Configure important bits */ - tmp |= MDREFR_K0RUN | MDREFR_SLFRSH; - tmp &= ~(MDREFR_APD | MDREFR_E1PIN); - - /* Write MDREFR back */ - writelrb(tmp, MDREFR); - - /* - * 5) Initialize Synchronous Static Memory (Flash/Peripherals) - */ - - /* Initialize SXCNFG register. Assert the enable bits. - * - * Write SXMRS to cause an MRS command to all enabled banks of - * synchronous static memory. Note that SXLCR need not be written - * at this time. - */ - writelrb(CONFIG_SYS_SXCNFG_VAL, SXCNFG); - - /* - * 6) Initialize SDRAM - */ - - writelrb(CONFIG_SYS_MDREFR_VAL & ~MDREFR_SLFRSH, MDREFR); - writelrb(CONFIG_SYS_MDREFR_VAL | MDREFR_E1PIN, MDREFR); - - /* - * 7) Write MDCNFG with MDCNFG:DEx deasserted (set to 0), to configure - * but not enable each SDRAM partition pair. - */ - - writelrb(CONFIG_SYS_MDCNFG_VAL & - ~(MDCNFG_DE0 | MDCNFG_DE1 | MDCNFG_DE2 | MDCNFG_DE3), MDCNFG); - - /* Wait for the clock to the SDRAMs to stabilize, 100..200 usec. */ - writel(0, OSCR); - while (readl(OSCR) < 0x300) - asm volatile("" : : : "memory"); - - /* - * 8) Trigger a number (usually 8) refresh cycles by attempting - * non-burst read or write accesses to disabled SDRAM, as commonly - * specified in the power up sequence documented in SDRAM data - * sheets. The address(es) used for this purpose must not be - * cacheable. - */ - for (i = 9; i >= 0; i--) { - writel(i, 0xa0000000); - asm volatile("" : : : "memory"); - } - /* - * 9) Write MDCNFG with enable bits asserted (MDCNFG:DEx set to 1). - */ - - tmp = CONFIG_SYS_MDCNFG_VAL & - (MDCNFG_DE0 | MDCNFG_DE1 | MDCNFG_DE2 | MDCNFG_DE3); - tmp |= readl(MDCNFG); - writelrb(tmp, MDCNFG); - - /* - * 10) Write MDMRS. - */ - - writelrb(CONFIG_SYS_MDMRS_VAL, MDMRS); - - /* - * 11) Enable APD - */ - - if (CONFIG_SYS_MDREFR_VAL & MDREFR_APD) { - tmp = readl(MDREFR); - tmp |= MDREFR_APD; - writelrb(tmp, MDREFR); - } -} - -void pxa_gpio_setup(void) -{ - writel(CONFIG_SYS_GPSR0_VAL, GPSR0); - writel(CONFIG_SYS_GPSR1_VAL, GPSR1); - writel(CONFIG_SYS_GPSR2_VAL, GPSR2); -#if defined(CONFIG_CPU_PXA27X) - writel(CONFIG_SYS_GPSR3_VAL, GPSR3); -#endif - - writel(CONFIG_SYS_GPCR0_VAL, GPCR0); - writel(CONFIG_SYS_GPCR1_VAL, GPCR1); - writel(CONFIG_SYS_GPCR2_VAL, GPCR2); -#if defined(CONFIG_CPU_PXA27X) - writel(CONFIG_SYS_GPCR3_VAL, GPCR3); -#endif - - writel(CONFIG_SYS_GPDR0_VAL, GPDR0); - writel(CONFIG_SYS_GPDR1_VAL, GPDR1); - writel(CONFIG_SYS_GPDR2_VAL, GPDR2); -#if defined(CONFIG_CPU_PXA27X) - writel(CONFIG_SYS_GPDR3_VAL, GPDR3); -#endif - - writel(CONFIG_SYS_GAFR0_L_VAL, GAFR0_L); - writel(CONFIG_SYS_GAFR0_U_VAL, GAFR0_U); - writel(CONFIG_SYS_GAFR1_L_VAL, GAFR1_L); - writel(CONFIG_SYS_GAFR1_U_VAL, GAFR1_U); - writel(CONFIG_SYS_GAFR2_L_VAL, GAFR2_L); - writel(CONFIG_SYS_GAFR2_U_VAL, GAFR2_U); -#if defined(CONFIG_CPU_PXA27X) - writel(CONFIG_SYS_GAFR3_L_VAL, GAFR3_L); - writel(CONFIG_SYS_GAFR3_U_VAL, GAFR3_U); -#endif - - writel(CONFIG_SYS_PSSR_VAL, PSSR); -} - -void pxa_interrupt_setup(void) -{ - writel(0, ICLR); - writel(0, ICMR); -#if defined(CONFIG_CPU_PXA27X) - writel(0, ICLR2); - writel(0, ICMR2); -#endif -} - -void pxa_clock_setup(void) -{ - writel(CONFIG_SYS_CKEN, CKEN); - writel(CONFIG_SYS_CCCR, CCCR); - asm volatile("mcr p14, 0, %0, c6, c0, 0" : : "r"(0x0b)); - - /* enable the 32Khz oscillator for RTC and PowerManager */ - writel(OSCC_OON, OSCC); - while (!(readl(OSCC) & OSCC_OOK)) - asm volatile("" : : : "memory"); -} - -void pxa_wakeup(void) -{ - uint32_t rcsr; - - rcsr = readl(RCSR); - writel(rcsr & (RCSR_GPR | RCSR_SMR | RCSR_WDR | RCSR_HWR), RCSR); - - /* Wakeup */ - if (rcsr & RCSR_SMR) { - writel(PSSR_PH, PSSR); - pxa2xx_dram_init(); - icache_disable(); - dcache_disable(); - asm volatile("mov pc, %0" : : "r"(readl(PSPR))); - } -} - -int arch_cpu_init(void) -{ - pxa_gpio_setup(); - pxa_wakeup(); - pxa_interrupt_setup(); - pxa_clock_setup(); - return 0; -} - -void i2c_clk_enable(void) -{ - /* Set the global I2C clock on */ - writel(readl(CKEN) | CKEN14_I2C, CKEN); -} - -void __attribute__((weak)) reset_cpu(void) __attribute__((noreturn)); - -void reset_cpu(void) -{ - uint32_t tmp; - - setbits_le32(OWER, OWER_WME); - - tmp = readl(OSCR); - tmp += 0x1000; - writel(tmp, OSMR3); - writel(MDREFR_SLFRSH, MDREFR); - - for (;;) - ; -} - -void enable_caches(void) -{ -#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF) - icache_enable(); -#endif -#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) - dcache_enable(); -#endif -} |