| /* |
| * ASPEED System Control Unit |
| * |
| * Andrew Jeffery <andrew@aj.id.au> |
| * |
| * Copyright 2016 IBM Corp. |
| * |
| * This code is licensed under the GPL version 2 or later. See |
| * the COPYING file in the top-level directory. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "hw/misc/aspeed_scu.h" |
| #include "hw/qdev-properties.h" |
| #include "migration/vmstate.h" |
| #include "qapi/error.h" |
| #include "qapi/visitor.h" |
| #include "qemu/bitops.h" |
| #include "qemu/log.h" |
| #include "qemu/guest-random.h" |
| #include "qemu/module.h" |
| #include "trace.h" |
| |
| #define TO_REG(offset) ((offset) >> 2) |
| |
| #define PROT_KEY TO_REG(0x00) |
| #define SYS_RST_CTRL TO_REG(0x04) |
| #define CLK_SEL TO_REG(0x08) |
| #define CLK_STOP_CTRL TO_REG(0x0C) |
| #define FREQ_CNTR_CTRL TO_REG(0x10) |
| #define FREQ_CNTR_EVAL TO_REG(0x14) |
| #define IRQ_CTRL TO_REG(0x18) |
| #define D2PLL_PARAM TO_REG(0x1C) |
| #define MPLL_PARAM TO_REG(0x20) |
| #define HPLL_PARAM TO_REG(0x24) |
| #define FREQ_CNTR_RANGE TO_REG(0x28) |
| #define MISC_CTRL1 TO_REG(0x2C) |
| #define PCI_CTRL1 TO_REG(0x30) |
| #define PCI_CTRL2 TO_REG(0x34) |
| #define PCI_CTRL3 TO_REG(0x38) |
| #define SYS_RST_STATUS TO_REG(0x3C) |
| #define SOC_SCRATCH1 TO_REG(0x40) |
| #define SOC_SCRATCH2 TO_REG(0x44) |
| #define MAC_CLK_DELAY TO_REG(0x48) |
| #define MISC_CTRL2 TO_REG(0x4C) |
| #define VGA_SCRATCH1 TO_REG(0x50) |
| #define VGA_SCRATCH2 TO_REG(0x54) |
| #define VGA_SCRATCH3 TO_REG(0x58) |
| #define VGA_SCRATCH4 TO_REG(0x5C) |
| #define VGA_SCRATCH5 TO_REG(0x60) |
| #define VGA_SCRATCH6 TO_REG(0x64) |
| #define VGA_SCRATCH7 TO_REG(0x68) |
| #define VGA_SCRATCH8 TO_REG(0x6C) |
| #define HW_STRAP1 TO_REG(0x70) |
| #define RNG_CTRL TO_REG(0x74) |
| #define RNG_DATA TO_REG(0x78) |
| #define SILICON_REV TO_REG(0x7C) |
| #define PINMUX_CTRL1 TO_REG(0x80) |
| #define PINMUX_CTRL2 TO_REG(0x84) |
| #define PINMUX_CTRL3 TO_REG(0x88) |
| #define PINMUX_CTRL4 TO_REG(0x8C) |
| #define PINMUX_CTRL5 TO_REG(0x90) |
| #define PINMUX_CTRL6 TO_REG(0x94) |
| #define WDT_RST_CTRL TO_REG(0x9C) |
| #define PINMUX_CTRL7 TO_REG(0xA0) |
| #define PINMUX_CTRL8 TO_REG(0xA4) |
| #define PINMUX_CTRL9 TO_REG(0xA8) |
| #define WAKEUP_EN TO_REG(0xC0) |
| #define WAKEUP_CTRL TO_REG(0xC4) |
| #define HW_STRAP2 TO_REG(0xD0) |
| #define FREE_CNTR4 TO_REG(0xE0) |
| #define FREE_CNTR4_EXT TO_REG(0xE4) |
| #define CPU2_CTRL TO_REG(0x100) |
| #define CPU2_BASE_SEG1 TO_REG(0x104) |
| #define CPU2_BASE_SEG2 TO_REG(0x108) |
| #define CPU2_BASE_SEG3 TO_REG(0x10C) |
| #define CPU2_BASE_SEG4 TO_REG(0x110) |
| #define CPU2_BASE_SEG5 TO_REG(0x114) |
| #define CPU2_CACHE_CTRL TO_REG(0x118) |
| #define CHIP_ID0 TO_REG(0x150) |
| #define CHIP_ID1 TO_REG(0x154) |
| #define UART_HPLL_CLK TO_REG(0x160) |
| #define PCIE_CTRL TO_REG(0x180) |
| #define BMC_MMIO_CTRL TO_REG(0x184) |
| #define RELOC_DECODE_BASE1 TO_REG(0x188) |
| #define RELOC_DECODE_BASE2 TO_REG(0x18C) |
| #define MAILBOX_DECODE_BASE TO_REG(0x190) |
| #define SRAM_DECODE_BASE1 TO_REG(0x194) |
| #define SRAM_DECODE_BASE2 TO_REG(0x198) |
| #define BMC_REV TO_REG(0x19C) |
| #define BMC_DEV_ID TO_REG(0x1A4) |
| |
| #define AST2600_PROT_KEY TO_REG(0x00) |
| #define AST2600_SILICON_REV TO_REG(0x04) |
| #define AST2600_SILICON_REV2 TO_REG(0x14) |
| #define AST2600_SYS_RST_CTRL TO_REG(0x40) |
| #define AST2600_SYS_RST_CTRL_CLR TO_REG(0x44) |
| #define AST2600_SYS_RST_CTRL2 TO_REG(0x50) |
| #define AST2600_SYS_RST_CTRL2_CLR TO_REG(0x54) |
| #define AST2600_CLK_STOP_CTRL TO_REG(0x80) |
| #define AST2600_CLK_STOP_CTRL_CLR TO_REG(0x84) |
| #define AST2600_CLK_STOP_CTRL2 TO_REG(0x90) |
| #define AST2600_CLK_STOP_CTRL2_CLR TO_REG(0x94) |
| #define AST2600_SDRAM_HANDSHAKE TO_REG(0x100) |
| #define AST2600_HPLL_PARAM TO_REG(0x200) |
| #define AST2600_HPLL_EXT TO_REG(0x204) |
| #define AST2600_MPLL_EXT TO_REG(0x224) |
| #define AST2600_EPLL_EXT TO_REG(0x244) |
| #define AST2600_CLK_SEL TO_REG(0x300) |
| #define AST2600_CLK_SEL2 TO_REG(0x304) |
| #define AST2600_CLK_SEL3 TO_REG(0x310) |
| #define AST2600_HW_STRAP1 TO_REG(0x500) |
| #define AST2600_HW_STRAP1_CLR TO_REG(0x504) |
| #define AST2600_HW_STRAP1_PROT TO_REG(0x508) |
| #define AST2600_HW_STRAP2 TO_REG(0x510) |
| #define AST2600_HW_STRAP2_CLR TO_REG(0x514) |
| #define AST2600_HW_STRAP2_PROT TO_REG(0x518) |
| #define AST2600_RNG_CTRL TO_REG(0x524) |
| #define AST2600_RNG_DATA TO_REG(0x540) |
| #define AST2600_CHIP_ID0 TO_REG(0x5B0) |
| #define AST2600_CHIP_ID1 TO_REG(0x5B4) |
| |
| #define AST2600_CLK TO_REG(0x40) |
| |
| #define SCU_IO_REGION_SIZE 0x1000 |
| |
| static const uint32_t ast2400_a0_resets[ASPEED_SCU_NR_REGS] = { |
| [SYS_RST_CTRL] = 0xFFCFFEDCU, |
| [CLK_SEL] = 0xF3F40000U, |
| [CLK_STOP_CTRL] = 0x19FC3E8BU, |
| [D2PLL_PARAM] = 0x00026108U, |
| [MPLL_PARAM] = 0x00030291U, |
| [HPLL_PARAM] = 0x00000291U, |
| [MISC_CTRL1] = 0x00000010U, |
| [PCI_CTRL1] = 0x20001A03U, |
| [PCI_CTRL2] = 0x20001A03U, |
| [PCI_CTRL3] = 0x04000030U, |
| [SYS_RST_STATUS] = 0x00000001U, |
| [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ |
| [MISC_CTRL2] = 0x00000023U, |
| [RNG_CTRL] = 0x0000000EU, |
| [PINMUX_CTRL2] = 0x0000F000U, |
| [PINMUX_CTRL3] = 0x01000000U, |
| [PINMUX_CTRL4] = 0x000000FFU, |
| [PINMUX_CTRL5] = 0x0000A000U, |
| [WDT_RST_CTRL] = 0x003FFFF3U, |
| [PINMUX_CTRL8] = 0xFFFF0000U, |
| [PINMUX_CTRL9] = 0x000FFFFFU, |
| [FREE_CNTR4] = 0x000000FFU, |
| [FREE_CNTR4_EXT] = 0x000000FFU, |
| [CPU2_BASE_SEG1] = 0x80000000U, |
| [CPU2_BASE_SEG4] = 0x1E600000U, |
| [CPU2_BASE_SEG5] = 0xC0000000U, |
| [UART_HPLL_CLK] = 0x00001903U, |
| [PCIE_CTRL] = 0x0000007BU, |
| [BMC_DEV_ID] = 0x00002402U |
| }; |
| |
| /* SCU70 bit 23: 0 24Mhz. bit 11:9: 0b001 AXI:ABH ratio 2:1 */ |
| /* AST2500 revision A1 */ |
| |
| static const uint32_t ast2500_a1_resets[ASPEED_SCU_NR_REGS] = { |
| [SYS_RST_CTRL] = 0xFFCFFEDCU, |
| [CLK_SEL] = 0xF3F40000U, |
| [CLK_STOP_CTRL] = 0x19FC3E8BU, |
| [D2PLL_PARAM] = 0x00026108U, |
| [MPLL_PARAM] = 0x00030291U, |
| [HPLL_PARAM] = 0x93000400U, |
| [MISC_CTRL1] = 0x00000010U, |
| [PCI_CTRL1] = 0x20001A03U, |
| [PCI_CTRL2] = 0x20001A03U, |
| [PCI_CTRL3] = 0x04000030U, |
| [SYS_RST_STATUS] = 0x00000001U, |
| [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ |
| [MISC_CTRL2] = 0x00000023U, |
| [RNG_CTRL] = 0x0000000EU, |
| [PINMUX_CTRL2] = 0x0000F000U, |
| [PINMUX_CTRL3] = 0x03000000U, |
| [PINMUX_CTRL4] = 0x00000000U, |
| [PINMUX_CTRL5] = 0x0000A000U, |
| [WDT_RST_CTRL] = 0x023FFFF3U, |
| [PINMUX_CTRL8] = 0xFFFF0000U, |
| [PINMUX_CTRL9] = 0x000FFFFFU, |
| [FREE_CNTR4] = 0x000000FFU, |
| [FREE_CNTR4_EXT] = 0x000000FFU, |
| [CPU2_BASE_SEG1] = 0x80000000U, |
| [CPU2_BASE_SEG4] = 0x1E600000U, |
| [CPU2_BASE_SEG5] = 0xC0000000U, |
| [CHIP_ID0] = 0x1234ABCDU, |
| [CHIP_ID1] = 0x88884444U, |
| [UART_HPLL_CLK] = 0x00001903U, |
| [PCIE_CTRL] = 0x0000007BU, |
| [BMC_DEV_ID] = 0x00002402U |
| }; |
| |
| static uint32_t aspeed_scu_get_random(void) |
| { |
| uint32_t num; |
| qemu_guest_getrandom_nofail(&num, sizeof(num)); |
| return num; |
| } |
| |
| uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s) |
| { |
| AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); |
| uint32_t hpll = asc->calc_hpll(s, s->regs[HPLL_PARAM]); |
| |
| return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[CLK_SEL]) + 1) |
| / asc->apb_divider; |
| } |
| |
| static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size) |
| { |
| AspeedSCUState *s = ASPEED_SCU(opaque); |
| int reg = TO_REG(offset); |
| |
| if (reg >= ASPEED_SCU_NR_REGS) { |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return 0; |
| } |
| |
| switch (reg) { |
| case RNG_DATA: |
| /* On hardware, RNG_DATA works regardless of |
| * the state of the enable bit in RNG_CTRL |
| */ |
| s->regs[RNG_DATA] = aspeed_scu_get_random(); |
| break; |
| case WAKEUP_EN: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Read of write-only offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| break; |
| } |
| |
| return s->regs[reg]; |
| } |
| |
| static void aspeed_ast2400_scu_write(void *opaque, hwaddr offset, |
| uint64_t data, unsigned size) |
| { |
| AspeedSCUState *s = ASPEED_SCU(opaque); |
| int reg = TO_REG(offset); |
| |
| if (reg >= ASPEED_SCU_NR_REGS) { |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return; |
| } |
| |
| if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && |
| !s->regs[PROT_KEY]) { |
| qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); |
| } |
| |
| trace_aspeed_scu_write(offset, size, data); |
| |
| switch (reg) { |
| case PROT_KEY: |
| s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; |
| return; |
| case SILICON_REV: |
| case FREQ_CNTR_EVAL: |
| case VGA_SCRATCH1 ... VGA_SCRATCH8: |
| case RNG_DATA: |
| case FREE_CNTR4: |
| case FREE_CNTR4_EXT: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return; |
| } |
| |
| s->regs[reg] = data; |
| } |
| |
| static void aspeed_ast2500_scu_write(void *opaque, hwaddr offset, |
| uint64_t data, unsigned size) |
| { |
| AspeedSCUState *s = ASPEED_SCU(opaque); |
| int reg = TO_REG(offset); |
| |
| if (reg >= ASPEED_SCU_NR_REGS) { |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return; |
| } |
| |
| if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && |
| !s->regs[PROT_KEY]) { |
| qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); |
| return; |
| } |
| |
| trace_aspeed_scu_write(offset, size, data); |
| |
| switch (reg) { |
| case PROT_KEY: |
| s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; |
| return; |
| case HW_STRAP1: |
| s->regs[HW_STRAP1] |= data; |
| return; |
| case SILICON_REV: |
| s->regs[HW_STRAP1] &= ~data; |
| return; |
| case FREQ_CNTR_EVAL: |
| case VGA_SCRATCH1 ... VGA_SCRATCH8: |
| case RNG_DATA: |
| case FREE_CNTR4: |
| case FREE_CNTR4_EXT: |
| case CHIP_ID0: |
| case CHIP_ID1: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return; |
| } |
| |
| s->regs[reg] = data; |
| } |
| |
| static const MemoryRegionOps aspeed_ast2400_scu_ops = { |
| .read = aspeed_scu_read, |
| .write = aspeed_ast2400_scu_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| .valid.min_access_size = 4, |
| .valid.max_access_size = 4, |
| .valid.unaligned = false, |
| }; |
| |
| static const MemoryRegionOps aspeed_ast2500_scu_ops = { |
| .read = aspeed_scu_read, |
| .write = aspeed_ast2500_scu_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| .valid.min_access_size = 4, |
| .valid.max_access_size = 4, |
| .valid.unaligned = false, |
| }; |
| |
| static uint32_t aspeed_scu_get_clkin(AspeedSCUState *s) |
| { |
| if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN) { |
| return 25000000; |
| } else if (s->hw_strap1 & SCU_HW_STRAP_CLK_48M_IN) { |
| return 48000000; |
| } else { |
| return 24000000; |
| } |
| } |
| |
| /* |
| * Strapped frequencies for the AST2400 in MHz. They depend on the |
| * clkin frequency. |
| */ |
| static const uint32_t hpll_ast2400_freqs[][4] = { |
| { 384, 360, 336, 408 }, /* 24MHz or 48MHz */ |
| { 400, 375, 350, 425 }, /* 25MHz */ |
| }; |
| |
| static uint32_t aspeed_2400_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) |
| { |
| uint8_t freq_select; |
| bool clk_25m_in; |
| uint32_t clkin = aspeed_scu_get_clkin(s); |
| |
| if (hpll_reg & SCU_AST2400_H_PLL_OFF) { |
| return 0; |
| } |
| |
| if (hpll_reg & SCU_AST2400_H_PLL_PROGRAMMED) { |
| uint32_t multiplier = 1; |
| |
| if (!(hpll_reg & SCU_AST2400_H_PLL_BYPASS_EN)) { |
| uint32_t n = (hpll_reg >> 5) & 0x3f; |
| uint32_t od = (hpll_reg >> 4) & 0x1; |
| uint32_t d = hpll_reg & 0xf; |
| |
| multiplier = (2 - od) * ((n + 2) / (d + 1)); |
| } |
| |
| return clkin * multiplier; |
| } |
| |
| /* HW strapping */ |
| clk_25m_in = !!(s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN); |
| freq_select = SCU_AST2400_HW_STRAP_GET_H_PLL_CLK(s->hw_strap1); |
| |
| return hpll_ast2400_freqs[clk_25m_in][freq_select] * 1000000; |
| } |
| |
| static uint32_t aspeed_2500_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) |
| { |
| uint32_t multiplier = 1; |
| uint32_t clkin = aspeed_scu_get_clkin(s); |
| |
| if (hpll_reg & SCU_H_PLL_OFF) { |
| return 0; |
| } |
| |
| if (!(hpll_reg & SCU_H_PLL_BYPASS_EN)) { |
| uint32_t p = (hpll_reg >> 13) & 0x3f; |
| uint32_t m = (hpll_reg >> 5) & 0xff; |
| uint32_t n = hpll_reg & 0x1f; |
| |
| multiplier = ((m + 1) / (n + 1)) / (p + 1); |
| } |
| |
| return clkin * multiplier; |
| } |
| |
| static void aspeed_scu_reset(DeviceState *dev) |
| { |
| AspeedSCUState *s = ASPEED_SCU(dev); |
| AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); |
| |
| memcpy(s->regs, asc->resets, asc->nr_regs * 4); |
| s->regs[SILICON_REV] = s->silicon_rev; |
| s->regs[HW_STRAP1] = s->hw_strap1; |
| s->regs[HW_STRAP2] = s->hw_strap2; |
| s->regs[PROT_KEY] = s->hw_prot_key; |
| } |
| |
| static uint32_t aspeed_silicon_revs[] = { |
| AST2400_A0_SILICON_REV, |
| AST2400_A1_SILICON_REV, |
| AST2500_A0_SILICON_REV, |
| AST2500_A1_SILICON_REV, |
| AST2600_A0_SILICON_REV, |
| }; |
| |
| bool is_supported_silicon_rev(uint32_t silicon_rev) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(aspeed_silicon_revs); i++) { |
| if (silicon_rev == aspeed_silicon_revs[i]) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| static void aspeed_scu_realize(DeviceState *dev, Error **errp) |
| { |
| SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
| AspeedSCUState *s = ASPEED_SCU(dev); |
| AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); |
| |
| if (!is_supported_silicon_rev(s->silicon_rev)) { |
| error_setg(errp, "Unknown silicon revision: 0x%" PRIx32, |
| s->silicon_rev); |
| return; |
| } |
| |
| memory_region_init_io(&s->iomem, OBJECT(s), asc->ops, s, |
| TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE); |
| |
| sysbus_init_mmio(sbd, &s->iomem); |
| } |
| |
| static const VMStateDescription vmstate_aspeed_scu = { |
| .name = "aspeed.scu", |
| .version_id = 2, |
| .minimum_version_id = 2, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32_ARRAY(regs, AspeedSCUState, ASPEED_AST2600_SCU_NR_REGS), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static Property aspeed_scu_properties[] = { |
| DEFINE_PROP_UINT32("silicon-rev", AspeedSCUState, silicon_rev, 0), |
| DEFINE_PROP_UINT32("hw-strap1", AspeedSCUState, hw_strap1, 0), |
| DEFINE_PROP_UINT32("hw-strap2", AspeedSCUState, hw_strap2, 0), |
| DEFINE_PROP_UINT32("hw-prot-key", AspeedSCUState, hw_prot_key, 0), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void aspeed_scu_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| dc->realize = aspeed_scu_realize; |
| dc->reset = aspeed_scu_reset; |
| dc->desc = "ASPEED System Control Unit"; |
| dc->vmsd = &vmstate_aspeed_scu; |
| device_class_set_props(dc, aspeed_scu_properties); |
| } |
| |
| static const TypeInfo aspeed_scu_info = { |
| .name = TYPE_ASPEED_SCU, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(AspeedSCUState), |
| .class_init = aspeed_scu_class_init, |
| .class_size = sizeof(AspeedSCUClass), |
| .abstract = true, |
| }; |
| |
| static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); |
| |
| dc->desc = "ASPEED 2400 System Control Unit"; |
| asc->resets = ast2400_a0_resets; |
| asc->calc_hpll = aspeed_2400_scu_calc_hpll; |
| asc->apb_divider = 2; |
| asc->nr_regs = ASPEED_SCU_NR_REGS; |
| asc->ops = &aspeed_ast2400_scu_ops; |
| } |
| |
| static const TypeInfo aspeed_2400_scu_info = { |
| .name = TYPE_ASPEED_2400_SCU, |
| .parent = TYPE_ASPEED_SCU, |
| .instance_size = sizeof(AspeedSCUState), |
| .class_init = aspeed_2400_scu_class_init, |
| }; |
| |
| static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); |
| |
| dc->desc = "ASPEED 2500 System Control Unit"; |
| asc->resets = ast2500_a1_resets; |
| asc->calc_hpll = aspeed_2500_scu_calc_hpll; |
| asc->apb_divider = 4; |
| asc->nr_regs = ASPEED_SCU_NR_REGS; |
| asc->ops = &aspeed_ast2500_scu_ops; |
| } |
| |
| static const TypeInfo aspeed_2500_scu_info = { |
| .name = TYPE_ASPEED_2500_SCU, |
| .parent = TYPE_ASPEED_SCU, |
| .instance_size = sizeof(AspeedSCUState), |
| .class_init = aspeed_2500_scu_class_init, |
| }; |
| |
| static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset, |
| unsigned size) |
| { |
| AspeedSCUState *s = ASPEED_SCU(opaque); |
| int reg = TO_REG(offset); |
| |
| if (reg >= ASPEED_AST2600_SCU_NR_REGS) { |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return 0; |
| } |
| |
| switch (reg) { |
| case AST2600_HPLL_EXT: |
| case AST2600_EPLL_EXT: |
| case AST2600_MPLL_EXT: |
| /* PLLs are always "locked" */ |
| return s->regs[reg] | BIT(31); |
| case AST2600_RNG_DATA: |
| /* |
| * On hardware, RNG_DATA works regardless of the state of the |
| * enable bit in RNG_CTRL |
| * |
| * TODO: Check this is true for ast2600 |
| */ |
| s->regs[AST2600_RNG_DATA] = aspeed_scu_get_random(); |
| break; |
| } |
| |
| return s->regs[reg]; |
| } |
| |
| static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, |
| uint64_t data64, unsigned size) |
| { |
| AspeedSCUState *s = ASPEED_SCU(opaque); |
| int reg = TO_REG(offset); |
| /* Truncate here so bitwise operations below behave as expected */ |
| uint32_t data = data64; |
| |
| if (reg >= ASPEED_AST2600_SCU_NR_REGS) { |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return; |
| } |
| |
| if (reg > PROT_KEY && !s->regs[PROT_KEY]) { |
| qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); |
| } |
| |
| trace_aspeed_scu_write(offset, size, data); |
| |
| switch (reg) { |
| case AST2600_PROT_KEY: |
| s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; |
| return; |
| case AST2600_HW_STRAP1: |
| case AST2600_HW_STRAP2: |
| if (s->regs[reg + 2]) { |
| return; |
| } |
| /* fall through */ |
| case AST2600_SYS_RST_CTRL: |
| case AST2600_SYS_RST_CTRL2: |
| case AST2600_CLK_STOP_CTRL: |
| case AST2600_CLK_STOP_CTRL2: |
| /* W1S (Write 1 to set) registers */ |
| s->regs[reg] |= data; |
| return; |
| case AST2600_SYS_RST_CTRL_CLR: |
| case AST2600_SYS_RST_CTRL2_CLR: |
| case AST2600_CLK_STOP_CTRL_CLR: |
| case AST2600_CLK_STOP_CTRL2_CLR: |
| case AST2600_HW_STRAP1_CLR: |
| case AST2600_HW_STRAP2_CLR: |
| /* |
| * W1C (Write 1 to clear) registers are offset by one address from |
| * the data register |
| */ |
| s->regs[reg - 1] &= ~data; |
| return; |
| |
| case AST2600_RNG_DATA: |
| case AST2600_SILICON_REV: |
| case AST2600_SILICON_REV2: |
| case AST2600_CHIP_ID0: |
| case AST2600_CHIP_ID1: |
| /* Add read only registers here */ |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", |
| __func__, offset); |
| return; |
| } |
| |
| s->regs[reg] = data; |
| } |
| |
| static const MemoryRegionOps aspeed_ast2600_scu_ops = { |
| .read = aspeed_ast2600_scu_read, |
| .write = aspeed_ast2600_scu_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| .valid.min_access_size = 4, |
| .valid.max_access_size = 4, |
| .valid.unaligned = false, |
| }; |
| |
| static const uint32_t ast2600_a0_resets[ASPEED_AST2600_SCU_NR_REGS] = { |
| [AST2600_SILICON_REV] = AST2600_SILICON_REV, |
| [AST2600_SILICON_REV2] = AST2600_SILICON_REV, |
| [AST2600_SYS_RST_CTRL] = 0xF7CFFEDC | 0x100, |
| [AST2600_SYS_RST_CTRL2] = 0xFFFFFFFC, |
| [AST2600_CLK_STOP_CTRL] = 0xEFF43E8B, |
| [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0, |
| [AST2600_SDRAM_HANDSHAKE] = 0x00000040, /* SoC completed DRAM init */ |
| [AST2600_HPLL_PARAM] = 0x1000405F, |
| [AST2600_CHIP_ID0] = 0x1234ABCD, |
| [AST2600_CHIP_ID1] = 0x88884444, |
| |
| }; |
| |
| static void aspeed_ast2600_scu_reset(DeviceState *dev) |
| { |
| AspeedSCUState *s = ASPEED_SCU(dev); |
| AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); |
| |
| memcpy(s->regs, asc->resets, asc->nr_regs * 4); |
| |
| s->regs[AST2600_SILICON_REV] = s->silicon_rev; |
| s->regs[AST2600_SILICON_REV2] = s->silicon_rev; |
| s->regs[AST2600_HW_STRAP1] = s->hw_strap1; |
| s->regs[AST2600_HW_STRAP2] = s->hw_strap2; |
| s->regs[PROT_KEY] = s->hw_prot_key; |
| } |
| |
| static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); |
| |
| dc->desc = "ASPEED 2600 System Control Unit"; |
| dc->reset = aspeed_ast2600_scu_reset; |
| asc->resets = ast2600_a0_resets; |
| asc->calc_hpll = aspeed_2500_scu_calc_hpll; /* No change since AST2500 */ |
| asc->apb_divider = 4; |
| asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS; |
| asc->ops = &aspeed_ast2600_scu_ops; |
| } |
| |
| static const TypeInfo aspeed_2600_scu_info = { |
| .name = TYPE_ASPEED_2600_SCU, |
| .parent = TYPE_ASPEED_SCU, |
| .instance_size = sizeof(AspeedSCUState), |
| .class_init = aspeed_2600_scu_class_init, |
| }; |
| |
| static void aspeed_scu_register_types(void) |
| { |
| type_register_static(&aspeed_scu_info); |
| type_register_static(&aspeed_2400_scu_info); |
| type_register_static(&aspeed_2500_scu_info); |
| type_register_static(&aspeed_2600_scu_info); |
| } |
| |
| type_init(aspeed_scu_register_types); |
