diff options
author | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
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committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/arch/arm/mach-mvebu/cpu.c | |
parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/arch/arm/mach-mvebu/cpu.c')
-rw-r--r-- | roms/u-boot/arch/arm/mach-mvebu/cpu.c | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/mach-mvebu/cpu.c b/roms/u-boot/arch/arm/mach-mvebu/cpu.c new file mode 100644 index 000000000..0b935c46f --- /dev/null +++ b/roms/u-boot/arch/arm/mach-mvebu/cpu.c @@ -0,0 +1,688 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de> + */ + +#include <common.h> +#include <ahci.h> +#include <cpu_func.h> +#include <init.h> +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/mbus.h> +#include <asm/io.h> +#include <asm/pl310.h> +#include <asm/arch/cpu.h> +#include <asm/arch/soc.h> +#include <sdhci.h> + +#define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3)) +#define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3)) + +static struct mbus_win windows[] = { + /* SPI */ + { MBUS_SPI_BASE, MBUS_SPI_SIZE, + CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPIFLASH }, + + /* NOR */ + { MBUS_BOOTROM_BASE, MBUS_BOOTROM_SIZE, + CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_BOOTROM }, + +#ifdef CONFIG_ARMADA_MSYS + /* DFX */ + { MBUS_DFX_BASE, MBUS_DFX_SIZE, CPU_TARGET_DFX, 0 }, +#endif +}; + +void lowlevel_init(void) +{ + /* + * Dummy implementation, we only need LOWLEVEL_INIT + * on Armada to configure CP15 in start.S / cpu_init_cp15() + */ +} + +void reset_cpu(void) +{ + struct mvebu_system_registers *reg = + (struct mvebu_system_registers *)MVEBU_SYSTEM_REG_BASE; + + writel(readl(®->rstoutn_mask) | 1, ®->rstoutn_mask); + writel(readl(®->sys_soft_rst) | 1, ®->sys_soft_rst); + while (1) + ; +} + +int mvebu_soc_family(void) +{ + u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; + + switch (devid) { + case SOC_MV78230_ID: + case SOC_MV78260_ID: + case SOC_MV78460_ID: + return MVEBU_SOC_AXP; + + case SOC_88F6720_ID: + return MVEBU_SOC_A375; + + case SOC_88F6810_ID: + case SOC_88F6820_ID: + case SOC_88F6828_ID: + return MVEBU_SOC_A38X; + + case SOC_98DX3236_ID: + case SOC_98DX3336_ID: + case SOC_98DX4251_ID: + return MVEBU_SOC_MSYS; + } + + return MVEBU_SOC_UNKNOWN; +} + +#if defined(CONFIG_DISPLAY_CPUINFO) + +#if defined(CONFIG_ARMADA_375) +/* SAR frequency values for Armada 375 */ +static const struct sar_freq_modes sar_freq_tab[] = { + { 0, 0x0, 266, 133, 266 }, + { 1, 0x0, 333, 167, 167 }, + { 2, 0x0, 333, 167, 222 }, + { 3, 0x0, 333, 167, 333 }, + { 4, 0x0, 400, 200, 200 }, + { 5, 0x0, 400, 200, 267 }, + { 6, 0x0, 400, 200, 400 }, + { 7, 0x0, 500, 250, 250 }, + { 8, 0x0, 500, 250, 334 }, + { 9, 0x0, 500, 250, 500 }, + { 10, 0x0, 533, 267, 267 }, + { 11, 0x0, 533, 267, 356 }, + { 12, 0x0, 533, 267, 533 }, + { 13, 0x0, 600, 300, 300 }, + { 14, 0x0, 600, 300, 400 }, + { 15, 0x0, 600, 300, 600 }, + { 16, 0x0, 666, 333, 333 }, + { 17, 0x0, 666, 333, 444 }, + { 18, 0x0, 666, 333, 666 }, + { 19, 0x0, 800, 400, 267 }, + { 20, 0x0, 800, 400, 400 }, + { 21, 0x0, 800, 400, 534 }, + { 22, 0x0, 900, 450, 300 }, + { 23, 0x0, 900, 450, 450 }, + { 24, 0x0, 900, 450, 600 }, + { 25, 0x0, 1000, 500, 500 }, + { 26, 0x0, 1000, 500, 667 }, + { 27, 0x0, 1000, 333, 500 }, + { 28, 0x0, 400, 400, 400 }, + { 29, 0x0, 1100, 550, 550 }, + { 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */ +}; +#elif defined(CONFIG_ARMADA_38X) +/* SAR frequency values for Armada 38x */ +static const struct sar_freq_modes sar_freq_tab[] = { + { 0x0, 0x0, 666, 333, 333 }, + { 0x2, 0x0, 800, 400, 400 }, + { 0x4, 0x0, 1066, 533, 533 }, + { 0x6, 0x0, 1200, 600, 600 }, + { 0x8, 0x0, 1332, 666, 666 }, + { 0xc, 0x0, 1600, 800, 800 }, + { 0x10, 0x0, 1866, 933, 933 }, + { 0x13, 0x0, 2000, 1000, 933 }, + { 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */ +}; +#elif defined(CONFIG_ARMADA_MSYS) +static const struct sar_freq_modes sar_freq_tab[] = { + { 0x0, 0x0, 400, 400, 400 }, + { 0x2, 0x0, 667, 333, 667 }, + { 0x3, 0x0, 800, 400, 800 }, + { 0x5, 0x0, 800, 400, 800 }, + { 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */ +}; +#else +/* SAR frequency values for Armada XP */ +static const struct sar_freq_modes sar_freq_tab[] = { + { 0xa, 0x5, 800, 400, 400 }, + { 0x1, 0x5, 1066, 533, 533 }, + { 0x2, 0x5, 1200, 600, 600 }, + { 0x2, 0x9, 1200, 600, 400 }, + { 0x3, 0x5, 1333, 667, 667 }, + { 0x4, 0x5, 1500, 750, 750 }, + { 0x4, 0x9, 1500, 750, 500 }, + { 0xb, 0x9, 1600, 800, 533 }, + { 0xb, 0xa, 1600, 800, 640 }, + { 0xb, 0x5, 1600, 800, 800 }, + { 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */ +}; +#endif + +void get_sar_freq(struct sar_freq_modes *sar_freq) +{ + u32 val; + u32 freq; + int i; + +#if defined(CONFIG_ARMADA_375) || defined(CONFIG_ARMADA_MSYS) + val = readl(CONFIG_SAR2_REG); /* SAR - Sample At Reset */ +#else + val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ +#endif + freq = (val & SAR_CPU_FREQ_MASK) >> SAR_CPU_FREQ_OFFS; +#if defined(SAR2_CPU_FREQ_MASK) + /* + * Shift CPU0 clock frequency select bit from SAR2 register + * into correct position + */ + freq |= ((readl(CONFIG_SAR2_REG) & SAR2_CPU_FREQ_MASK) + >> SAR2_CPU_FREQ_OFFS) << 3; +#endif + for (i = 0; sar_freq_tab[i].val != 0xff; i++) { + if (sar_freq_tab[i].val == freq) { +#if defined(CONFIG_ARMADA_375) || defined(CONFIG_ARMADA_38X) || defined(CONFIG_ARMADA_MSYS) + *sar_freq = sar_freq_tab[i]; + return; +#else + int k; + u8 ffc; + + ffc = (val & SAR_FFC_FREQ_MASK) >> + SAR_FFC_FREQ_OFFS; + for (k = i; sar_freq_tab[k].ffc != 0xff; k++) { + if (sar_freq_tab[k].ffc == ffc) { + *sar_freq = sar_freq_tab[k]; + return; + } + } + i = k; +#endif + } + } + + /* SAR value not found, return 0 for frequencies */ + *sar_freq = sar_freq_tab[i - 1]; +} + +int print_cpuinfo(void) +{ + u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; + u8 revid = readl(MVEBU_REG_PCIE_REVID) & 0xff; + struct sar_freq_modes sar_freq; + + puts("SoC: "); + + switch (devid) { + case SOC_MV78230_ID: + puts("MV78230-"); + break; + case SOC_MV78260_ID: + puts("MV78260-"); + break; + case SOC_MV78460_ID: + puts("MV78460-"); + break; + case SOC_88F6720_ID: + puts("MV88F6720-"); + break; + case SOC_88F6810_ID: + puts("MV88F6810-"); + break; + case SOC_88F6820_ID: + puts("MV88F6820-"); + break; + case SOC_88F6828_ID: + puts("MV88F6828-"); + break; + case SOC_98DX3236_ID: + puts("98DX3236-"); + break; + case SOC_98DX3336_ID: + puts("98DX3336-"); + break; + case SOC_98DX4251_ID: + puts("98DX4251-"); + break; + default: + puts("Unknown-"); + break; + } + + if (mvebu_soc_family() == MVEBU_SOC_AXP) { + switch (revid) { + case 1: + puts("A0"); + break; + case 2: + puts("B0"); + break; + default: + printf("?? (%x)", revid); + break; + } + } + + if (mvebu_soc_family() == MVEBU_SOC_A375) { + switch (revid) { + case MV_88F67XX_A0_ID: + puts("A0"); + break; + default: + printf("?? (%x)", revid); + break; + } + } + + if (mvebu_soc_family() == MVEBU_SOC_A38X) { + switch (revid) { + case MV_88F68XX_Z1_ID: + puts("Z1"); + break; + case MV_88F68XX_A0_ID: + puts("A0"); + break; + case MV_88F68XX_B0_ID: + puts("B0"); + break; + default: + printf("?? (%x)", revid); + break; + } + } + + if (mvebu_soc_family() == MVEBU_SOC_MSYS) { + switch (revid) { + case 3: + puts("A0"); + break; + case 4: + puts("A1"); + break; + default: + printf("?? (%x)", revid); + break; + } + } + + get_sar_freq(&sar_freq); + printf(" at %d MHz\n", sar_freq.p_clk); + + return 0; +} +#endif /* CONFIG_DISPLAY_CPUINFO */ + +/* + * This function initialize Controller DRAM Fastpath windows. + * It takes the CS size information from the 0x1500 scratch registers + * and sets the correct windows sizes and base addresses accordingly. + * + * These values are set in the scratch registers by the Marvell + * DDR3 training code, which is executed by the SPL before the + * main payload (U-Boot) is executed. + */ +static void update_sdram_window_sizes(void) +{ + u64 base = 0; + u32 size, temp; + int i; + + for (i = 0; i < SDRAM_MAX_CS; i++) { + size = readl((MVEBU_SDRAM_SCRATCH + (i * 8))) & SDRAM_ADDR_MASK; + if (size != 0) { + size |= ~(SDRAM_ADDR_MASK); + + /* Set Base Address */ + temp = (base & 0xFF000000ll) | ((base >> 32) & 0xF); + writel(temp, MVEBU_SDRAM_BASE + DDR_BASE_CS_OFF(i)); + + /* + * Check if out of max window size and resize + * the window + */ + temp = (readl(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)) & + ~(SDRAM_ADDR_MASK)) | 1; + temp |= (size & SDRAM_ADDR_MASK); + writel(temp, MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)); + + base += ((u64)size + 1); + } else { + /* + * Disable window if not used, otherwise this + * leads to overlapping enabled windows with + * pretty strange results + */ + clrbits_le32(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i), 1); + } + } +} + +void mmu_disable(void) +{ + asm volatile( + "mrc p15, 0, r0, c1, c0, 0\n" + "bic r0, #1\n" + "mcr p15, 0, r0, c1, c0, 0\n"); +} + +#ifdef CONFIG_ARCH_CPU_INIT +static void set_cbar(u32 addr) +{ + asm("mcr p15, 4, %0, c15, c0" : : "r" (addr)); +} + +#define MV_USB_PHY_BASE (MVEBU_AXP_USB_BASE + 0x800) +#define MV_USB_PHY_PLL_REG(reg) (MV_USB_PHY_BASE | (((reg) & 0xF) << 2)) +#define MV_USB_X3_BASE(addr) (MVEBU_AXP_USB_BASE | BIT(11) | \ + (((addr) & 0xF) << 6)) +#define MV_USB_X3_PHY_CHANNEL(dev, reg) (MV_USB_X3_BASE((dev) + 1) | \ + (((reg) & 0xF) << 2)) + +static void setup_usb_phys(void) +{ + int dev; + + /* + * USB PLL init + */ + + /* Setup PLL frequency */ + /* USB REF frequency = 25 MHz */ + clrsetbits_le32(MV_USB_PHY_PLL_REG(1), 0x3ff, 0x605); + + /* Power up PLL and PHY channel */ + setbits_le32(MV_USB_PHY_PLL_REG(2), BIT(9)); + + /* Assert VCOCAL_START */ + setbits_le32(MV_USB_PHY_PLL_REG(1), BIT(21)); + + mdelay(1); + + /* + * USB PHY init (change from defaults) specific for 40nm (78X30 78X60) + */ + + for (dev = 0; dev < 3; dev++) { + setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 3), BIT(15)); + + /* Assert REG_RCAL_START in channel REG 1 */ + setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12)); + udelay(40); + clrbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12)); + } +} + +/* + * This function is not called from the SPL U-Boot version + */ +int arch_cpu_init(void) +{ + struct pl310_regs *const pl310 = + (struct pl310_regs *)CONFIG_SYS_PL310_BASE; + + /* + * Only with disabled MMU its possible to switch the base + * register address on Armada 38x. Without this the SDRAM + * located at >= 0x4000.0000 is also not accessible, as its + * still locked to cache. + */ + mmu_disable(); + + /* Linux expects the internal registers to be at 0xf1000000 */ + writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG); + set_cbar(SOC_REGS_PHY_BASE + 0xC000); + + /* + * From this stage on, the SoC detection is working. As we have + * configured the internal register base to the value used + * in the macros / defines in the U-Boot header (soc.h). + */ + + if (mvebu_soc_family() == MVEBU_SOC_A38X) { + /* + * To fully release / unlock this area from cache, we need + * to flush all caches and disable the L2 cache. + */ + icache_disable(); + dcache_disable(); + clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); + } + + /* + * We need to call mvebu_mbus_probe() before calling + * update_sdram_window_sizes() as it disables all previously + * configured mbus windows and then configures them as + * required for U-Boot. Calling update_sdram_window_sizes() + * without this configuration will not work, as the internal + * registers can't be accessed reliably because of potenial + * double mapping. + * After updating the SDRAM access windows we need to call + * mvebu_mbus_probe() again, as this now correctly configures + * the SDRAM areas that are later used by the MVEBU drivers + * (e.g. USB, NETA). + */ + + /* + * First disable all windows + */ + mvebu_mbus_probe(NULL, 0); + + if (mvebu_soc_family() == MVEBU_SOC_AXP) { + /* + * Now the SDRAM access windows can be reconfigured using + * the information in the SDRAM scratch pad registers + */ + update_sdram_window_sizes(); + } + + /* + * Finally the mbus windows can be configured with the + * updated SDRAM sizes + */ + mvebu_mbus_probe(windows, ARRAY_SIZE(windows)); + + if (mvebu_soc_family() == MVEBU_SOC_AXP) { + /* Enable GBE0, GBE1, LCD and NFC PUP */ + clrsetbits_le32(ARMADA_XP_PUP_ENABLE, 0, + GE0_PUP_EN | GE1_PUP_EN | LCD_PUP_EN | + NAND_PUP_EN | SPI_PUP_EN); + + /* Configure USB PLL and PHYs on AXP */ + setup_usb_phys(); + } + + /* Enable NAND and NAND arbiter */ + clrsetbits_le32(MVEBU_SOC_DEV_MUX_REG, 0, NAND_EN | NAND_ARBITER_EN); + + /* Disable MBUS error propagation */ + clrsetbits_le32(SOC_COHERENCY_FABRIC_CTRL_REG, MBUS_ERR_PROP_EN, 0); + + return 0; +} +#endif /* CONFIG_ARCH_CPU_INIT */ + +u32 mvebu_get_nand_clock(void) +{ + u32 reg; + + if (mvebu_soc_family() == MVEBU_SOC_A38X) + reg = MVEBU_DFX_DIV_CLK_CTRL(1); + else if (mvebu_soc_family() == MVEBU_SOC_MSYS) + reg = MVEBU_DFX_DIV_CLK_CTRL(8); + else + reg = MVEBU_CORE_DIV_CLK_CTRL(1); + + return CONFIG_SYS_MVEBU_PLL_CLOCK / + ((readl(reg) & + NAND_ECC_DIVCKL_RATIO_MASK) >> NAND_ECC_DIVCKL_RATIO_OFFS); +} + +/* + * SOC specific misc init + */ +#if defined(CONFIG_ARCH_MISC_INIT) +int arch_misc_init(void) +{ + /* Nothing yet, perhaps we need something here later */ + return 0; +} +#endif /* CONFIG_ARCH_MISC_INIT */ + +#if defined(CONFIG_MMC_SDHCI_MV) && !defined(CONFIG_DM_MMC) +int board_mmc_init(struct bd_info *bis) +{ + mv_sdh_init(MVEBU_SDIO_BASE, 0, 0, + SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_WAIT_SEND_CMD); + + return 0; +} +#endif + +#define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0 +#define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4 + +#define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4)) +#define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4)) +#define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4)) + +static void ahci_mvebu_mbus_config(void __iomem *base) +{ + const struct mbus_dram_target_info *dram; + int i; + + /* mbus is not initialized in SPL; keep the ROM settings */ + if (IS_ENABLED(CONFIG_SPL_BUILD)) + return; + + dram = mvebu_mbus_dram_info(); + + for (i = 0; i < 4; i++) { + writel(0, base + AHCI_WINDOW_CTRL(i)); + writel(0, base + AHCI_WINDOW_BASE(i)); + writel(0, base + AHCI_WINDOW_SIZE(i)); + } + + for (i = 0; i < dram->num_cs; i++) { + const struct mbus_dram_window *cs = dram->cs + i; + + writel((cs->mbus_attr << 8) | + (dram->mbus_dram_target_id << 4) | 1, + base + AHCI_WINDOW_CTRL(i)); + writel(cs->base >> 16, base + AHCI_WINDOW_BASE(i)); + writel(((cs->size - 1) & 0xffff0000), + base + AHCI_WINDOW_SIZE(i)); + } +} + +static void ahci_mvebu_regret_option(void __iomem *base) +{ + /* + * Enable the regret bit to allow the SATA unit to regret a + * request that didn't receive an acknowlegde and avoid a + * deadlock + */ + writel(0x4, base + AHCI_VENDOR_SPECIFIC_0_ADDR); + writel(0x80, base + AHCI_VENDOR_SPECIFIC_0_DATA); +} + +int board_ahci_enable(void) +{ + ahci_mvebu_mbus_config((void __iomem *)MVEBU_SATA0_BASE); + ahci_mvebu_regret_option((void __iomem *)MVEBU_SATA0_BASE); + + return 0; +} + +#ifdef CONFIG_SCSI_AHCI_PLAT +void scsi_init(void) +{ + printf("MVEBU SATA INIT\n"); + board_ahci_enable(); + ahci_init((void __iomem *)MVEBU_SATA0_BASE); +} +#endif + +#ifdef CONFIG_USB_XHCI_MVEBU +#define USB3_MAX_WINDOWS 4 +#define USB3_WIN_CTRL(w) (0x0 + ((w) * 8)) +#define USB3_WIN_BASE(w) (0x4 + ((w) * 8)) + +static void xhci_mvebu_mbus_config(void __iomem *base, + const struct mbus_dram_target_info *dram) +{ + int i; + + for (i = 0; i < USB3_MAX_WINDOWS; i++) { + writel(0, base + USB3_WIN_CTRL(i)); + writel(0, base + USB3_WIN_BASE(i)); + } + + for (i = 0; i < dram->num_cs; i++) { + const struct mbus_dram_window *cs = dram->cs + i; + + /* Write size, attributes and target id to control register */ + writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) | + (dram->mbus_dram_target_id << 4) | 1, + base + USB3_WIN_CTRL(i)); + + /* Write base address to base register */ + writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(i)); + } +} + +int board_xhci_enable(fdt_addr_t base) +{ + const struct mbus_dram_target_info *dram; + + printf("MVEBU XHCI INIT controller @ 0x%lx\n", base); + + dram = mvebu_mbus_dram_info(); + xhci_mvebu_mbus_config((void __iomem *)base, dram); + + return 0; +} +#endif + +void enable_caches(void) +{ + /* Avoid problem with e.g. neta ethernet driver */ + invalidate_dcache_all(); + + /* + * Armada 375 still has some problems with d-cache enabled in the + * ethernet driver (mvpp2). So lets keep the d-cache disabled + * until this is solved. + */ + if (mvebu_soc_family() != MVEBU_SOC_A375) { + /* Enable D-cache. I-cache is already enabled in start.S */ + dcache_enable(); + } +} + +void v7_outer_cache_enable(void) +{ + if (mvebu_soc_family() == MVEBU_SOC_AXP) { + struct pl310_regs *const pl310 = + (struct pl310_regs *)CONFIG_SYS_PL310_BASE; + u32 u; + + /* The L2 cache is already disabled at this point */ + + /* + * For Aurora cache in no outer mode, enable via the CP15 + * coprocessor broadcasting of cache commands to L2. + */ + asm volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (u)); + u |= BIT(8); /* Set the FW bit */ + asm volatile("mcr p15, 1, %0, c15, c2, 0" : : "r" (u)); + + isb(); + + /* Enable the L2 cache */ + setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); + } +} + +void v7_outer_cache_disable(void) +{ + struct pl310_regs *const pl310 = + (struct pl310_regs *)CONFIG_SYS_PL310_BASE; + + clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); +} |