| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (c) 2024 ASPEED Technology Inc. |
| */ |
| |
| #include <linux/auxiliary_bus.h> |
| #include <linux/cleanup.h> |
| #include <linux/device.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/reset-controller.h> |
| #include <linux/slab.h> |
| |
| #include <dt-bindings/reset/aspeed,ast2700-scu.h> |
| |
| #define SCU0_RESET_CTRL1 0x200 |
| #define SCU0_RESET_CTRL2 0x220 |
| #define SCU1_RESET_CTRL1 0x200 |
| #define SCU1_RESET_CTRL2 0x220 |
| #define SCU1_PCIE3_CTRL 0x908 |
| |
| struct ast2700_reset_signal { |
| bool dedicated_clr; /* dedicated reset clr offset */ |
| u32 offset, bit; |
| }; |
| |
| struct aspeed_reset_info { |
| unsigned int nr_resets; |
| const struct ast2700_reset_signal *signal; |
| }; |
| |
| struct aspeed_reset { |
| struct reset_controller_dev rcdev; |
| struct aspeed_reset_info *info; |
| spinlock_t lock; /* Protect read-modify-write cycle */ |
| void __iomem *base; |
| }; |
| |
| static const struct ast2700_reset_signal ast2700_reset0_signals[] = { |
| [SCU0_RESET_SDRAM] = { true, SCU0_RESET_CTRL1, BIT(0) }, |
| [SCU0_RESET_DDRPHY] = { true, SCU0_RESET_CTRL1, BIT(1) }, |
| [SCU0_RESET_RSA] = { true, SCU0_RESET_CTRL1, BIT(2) }, |
| [SCU0_RESET_SHA3] = { true, SCU0_RESET_CTRL1, BIT(3) }, |
| [SCU0_RESET_HACE] = { true, SCU0_RESET_CTRL1, BIT(4) }, |
| [SCU0_RESET_SOC] = { true, SCU0_RESET_CTRL1, BIT(5) }, |
| [SCU0_RESET_VIDEO] = { true, SCU0_RESET_CTRL1, BIT(6) }, |
| [SCU0_RESET_2D] = { true, SCU0_RESET_CTRL1, BIT(7) }, |
| [SCU0_RESET_PCIS] = { true, SCU0_RESET_CTRL1, BIT(8) }, |
| [SCU0_RESET_RVAS0] = { true, SCU0_RESET_CTRL1, BIT(9) }, |
| [SCU0_RESET_RVAS1] = { true, SCU0_RESET_CTRL1, BIT(10) }, |
| [SCU0_RESET_SM3] = { true, SCU0_RESET_CTRL1, BIT(11) }, |
| [SCU0_RESET_SM4] = { true, SCU0_RESET_CTRL1, BIT(12) }, |
| [SCU0_RESET_CRT0] = { true, SCU0_RESET_CTRL1, BIT(13) }, |
| [SCU0_RESET_ECC] = { true, SCU0_RESET_CTRL1, BIT(14) }, |
| [SCU0_RESET_DP_PCI] = { true, SCU0_RESET_CTRL1, BIT(15) }, |
| [SCU0_RESET_UFS] = { true, SCU0_RESET_CTRL1, BIT(16) }, |
| [SCU0_RESET_EMMC] = { true, SCU0_RESET_CTRL1, BIT(17) }, |
| [SCU0_RESET_PCIE1RST] = { true, SCU0_RESET_CTRL1, BIT(18) }, |
| [SCU0_RESET_PCIE1RSTOE] = { true, SCU0_RESET_CTRL1, BIT(19) }, |
| [SCU0_RESET_PCIE0RST] = { true, SCU0_RESET_CTRL1, BIT(20) }, |
| [SCU0_RESET_PCIE0RSTOE] = { true, SCU0_RESET_CTRL1, BIT(21) }, |
| [SCU0_RESET_JTAG] = { true, SCU0_RESET_CTRL1, BIT(22) }, |
| [SCU0_RESET_MCTP0] = { true, SCU0_RESET_CTRL1, BIT(23) }, |
| [SCU0_RESET_MCTP1] = { true, SCU0_RESET_CTRL1, BIT(24) }, |
| [SCU0_RESET_XDMA0] = { true, SCU0_RESET_CTRL1, BIT(25) }, |
| [SCU0_RESET_XDMA1] = { true, SCU0_RESET_CTRL1, BIT(26) }, |
| [SCU0_RESET_H2X1] = { true, SCU0_RESET_CTRL1, BIT(27) }, |
| [SCU0_RESET_DP] = { true, SCU0_RESET_CTRL1, BIT(28) }, |
| [SCU0_RESET_DP_MCU] = { true, SCU0_RESET_CTRL1, BIT(29) }, |
| [SCU0_RESET_SSP] = { true, SCU0_RESET_CTRL1, BIT(30) }, |
| [SCU0_RESET_H2X0] = { true, SCU0_RESET_CTRL1, BIT(31) }, |
| [SCU0_RESET_PORTA_VHUB] = { true, SCU0_RESET_CTRL2, BIT(0) }, |
| [SCU0_RESET_PORTA_PHY3] = { true, SCU0_RESET_CTRL2, BIT(1) }, |
| [SCU0_RESET_PORTA_XHCI] = { true, SCU0_RESET_CTRL2, BIT(2) }, |
| [SCU0_RESET_PORTB_VHUB] = { true, SCU0_RESET_CTRL2, BIT(3) }, |
| [SCU0_RESET_PORTB_PHY3] = { true, SCU0_RESET_CTRL2, BIT(4) }, |
| [SCU0_RESET_PORTB_XHCI] = { true, SCU0_RESET_CTRL2, BIT(5) }, |
| [SCU0_RESET_PORTA_VHUB_EHCI] = { true, SCU0_RESET_CTRL2, BIT(6) }, |
| [SCU0_RESET_PORTB_VHUB_EHCI] = { true, SCU0_RESET_CTRL2, BIT(7) }, |
| [SCU0_RESET_UHCI] = { true, SCU0_RESET_CTRL2, BIT(8) }, |
| [SCU0_RESET_TSP] = { true, SCU0_RESET_CTRL2, BIT(9) }, |
| [SCU0_RESET_E2M0] = { true, SCU0_RESET_CTRL2, BIT(10) }, |
| [SCU0_RESET_E2M1] = { true, SCU0_RESET_CTRL2, BIT(11) }, |
| [SCU0_RESET_VLINK] = { true, SCU0_RESET_CTRL2, BIT(12) }, |
| }; |
| |
| static const struct ast2700_reset_signal ast2700_reset1_signals[] = { |
| [SCU1_RESET_LPC0] = { true, SCU1_RESET_CTRL1, BIT(0) }, |
| [SCU1_RESET_LPC1] = { true, SCU1_RESET_CTRL1, BIT(1) }, |
| [SCU1_RESET_MII] = { true, SCU1_RESET_CTRL1, BIT(2) }, |
| [SCU1_RESET_PECI] = { true, SCU1_RESET_CTRL1, BIT(3) }, |
| [SCU1_RESET_PWM] = { true, SCU1_RESET_CTRL1, BIT(4) }, |
| [SCU1_RESET_MAC0] = { true, SCU1_RESET_CTRL1, BIT(5) }, |
| [SCU1_RESET_MAC1] = { true, SCU1_RESET_CTRL1, BIT(6) }, |
| [SCU1_RESET_MAC2] = { true, SCU1_RESET_CTRL1, BIT(7) }, |
| [SCU1_RESET_ADC] = { true, SCU1_RESET_CTRL1, BIT(8) }, |
| [SCU1_RESET_SD] = { true, SCU1_RESET_CTRL1, BIT(9) }, |
| [SCU1_RESET_ESPI0] = { true, SCU1_RESET_CTRL1, BIT(10) }, |
| [SCU1_RESET_ESPI1] = { true, SCU1_RESET_CTRL1, BIT(11) }, |
| [SCU1_RESET_JTAG1] = { true, SCU1_RESET_CTRL1, BIT(12) }, |
| [SCU1_RESET_SPI0] = { true, SCU1_RESET_CTRL1, BIT(13) }, |
| [SCU1_RESET_SPI1] = { true, SCU1_RESET_CTRL1, BIT(14) }, |
| [SCU1_RESET_SPI2] = { true, SCU1_RESET_CTRL1, BIT(15) }, |
| [SCU1_RESET_I3C0] = { true, SCU1_RESET_CTRL1, BIT(16) }, |
| [SCU1_RESET_I3C1] = { true, SCU1_RESET_CTRL1, BIT(17) }, |
| [SCU1_RESET_I3C2] = { true, SCU1_RESET_CTRL1, BIT(18) }, |
| [SCU1_RESET_I3C3] = { true, SCU1_RESET_CTRL1, BIT(19) }, |
| [SCU1_RESET_I3C4] = { true, SCU1_RESET_CTRL1, BIT(20) }, |
| [SCU1_RESET_I3C5] = { true, SCU1_RESET_CTRL1, BIT(21) }, |
| [SCU1_RESET_I3C6] = { true, SCU1_RESET_CTRL1, BIT(22) }, |
| [SCU1_RESET_I3C7] = { true, SCU1_RESET_CTRL1, BIT(23) }, |
| [SCU1_RESET_I3C8] = { true, SCU1_RESET_CTRL1, BIT(24) }, |
| [SCU1_RESET_I3C9] = { true, SCU1_RESET_CTRL1, BIT(25) }, |
| [SCU1_RESET_I3C10] = { true, SCU1_RESET_CTRL1, BIT(26) }, |
| [SCU1_RESET_I3C11] = { true, SCU1_RESET_CTRL1, BIT(27) }, |
| [SCU1_RESET_I3C12] = { true, SCU1_RESET_CTRL1, BIT(28) }, |
| [SCU1_RESET_I3C13] = { true, SCU1_RESET_CTRL1, BIT(29) }, |
| [SCU1_RESET_I3C14] = { true, SCU1_RESET_CTRL1, BIT(30) }, |
| [SCU1_RESET_I3C15] = { true, SCU1_RESET_CTRL1, BIT(31) }, |
| [SCU1_RESET_MCU0] = { true, SCU1_RESET_CTRL2, BIT(0) }, |
| [SCU1_RESET_MCU1] = { true, SCU1_RESET_CTRL2, BIT(1) }, |
| [SCU1_RESET_H2A_SPI1] = { true, SCU1_RESET_CTRL2, BIT(2) }, |
| [SCU1_RESET_H2A_SPI2] = { true, SCU1_RESET_CTRL2, BIT(3) }, |
| [SCU1_RESET_UART0] = { true, SCU1_RESET_CTRL2, BIT(4) }, |
| [SCU1_RESET_UART1] = { true, SCU1_RESET_CTRL2, BIT(5) }, |
| [SCU1_RESET_UART2] = { true, SCU1_RESET_CTRL2, BIT(6) }, |
| [SCU1_RESET_UART3] = { true, SCU1_RESET_CTRL2, BIT(7) }, |
| [SCU1_RESET_I2C_FILTER] = { true, SCU1_RESET_CTRL2, BIT(8) }, |
| [SCU1_RESET_CALIPTRA] = { true, SCU1_RESET_CTRL2, BIT(9) }, |
| [SCU1_RESET_XDMA] = { true, SCU1_RESET_CTRL2, BIT(10) }, |
| [SCU1_RESET_FSI] = { true, SCU1_RESET_CTRL2, BIT(12) }, |
| [SCU1_RESET_CAN] = { true, SCU1_RESET_CTRL2, BIT(13) }, |
| [SCU1_RESET_MCTP] = { true, SCU1_RESET_CTRL2, BIT(14) }, |
| [SCU1_RESET_I2C] = { true, SCU1_RESET_CTRL2, BIT(15) }, |
| [SCU1_RESET_UART6] = { true, SCU1_RESET_CTRL2, BIT(16) }, |
| [SCU1_RESET_UART7] = { true, SCU1_RESET_CTRL2, BIT(17) }, |
| [SCU1_RESET_UART8] = { true, SCU1_RESET_CTRL2, BIT(18) }, |
| [SCU1_RESET_UART9] = { true, SCU1_RESET_CTRL2, BIT(19) }, |
| [SCU1_RESET_LTPI0] = { true, SCU1_RESET_CTRL2, BIT(20) }, |
| [SCU1_RESET_VGAL] = { true, SCU1_RESET_CTRL2, BIT(21) }, |
| [SCU1_RESET_LTPI1] = { true, SCU1_RESET_CTRL2, BIT(22) }, |
| [SCU1_RESET_ACE] = { true, SCU1_RESET_CTRL2, BIT(23) }, |
| [SCU1_RESET_E2M] = { true, SCU1_RESET_CTRL2, BIT(24) }, |
| [SCU1_RESET_UHCI] = { true, SCU1_RESET_CTRL2, BIT(25) }, |
| [SCU1_RESET_PORTC_USB2UART] = { true, SCU1_RESET_CTRL2, BIT(26) }, |
| [SCU1_RESET_PORTC_VHUB_EHCI] = { true, SCU1_RESET_CTRL2, BIT(27) }, |
| [SCU1_RESET_PORTD_USB2UART] = { true, SCU1_RESET_CTRL2, BIT(28) }, |
| [SCU1_RESET_PORTD_VHUB_EHCI] = { true, SCU1_RESET_CTRL2, BIT(29) }, |
| [SCU1_RESET_H2X] = { true, SCU1_RESET_CTRL2, BIT(30) }, |
| [SCU1_RESET_I3CDMA] = { true, SCU1_RESET_CTRL2, BIT(31) }, |
| [SCU1_RESET_PCIE2RST] = { false, SCU1_PCIE3_CTRL, BIT(0) }, |
| }; |
| |
| static inline struct aspeed_reset *to_aspeed_reset(struct reset_controller_dev *rcdev) |
| { |
| return container_of(rcdev, struct aspeed_reset, rcdev); |
| } |
| |
| static int aspeed_reset_assert(struct reset_controller_dev *rcdev, unsigned long id) |
| { |
| struct aspeed_reset *rc = to_aspeed_reset(rcdev); |
| void __iomem *reg_offset = rc->base + rc->info->signal[id].offset; |
| |
| if (rc->info->signal[id].dedicated_clr) { |
| writel(rc->info->signal[id].bit, reg_offset); |
| } else { |
| guard(spinlock_irqsave)(&rc->lock); |
| writel(readl(reg_offset) & ~rc->info->signal[id].bit, reg_offset); |
| } |
| |
| return 0; |
| } |
| |
| static int aspeed_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id) |
| { |
| struct aspeed_reset *rc = to_aspeed_reset(rcdev); |
| void __iomem *reg_offset = rc->base + rc->info->signal[id].offset; |
| |
| if (rc->info->signal[id].dedicated_clr) { |
| writel(rc->info->signal[id].bit, reg_offset + 0x04); |
| } else { |
| guard(spinlock_irqsave)(&rc->lock); |
| writel(readl(reg_offset) | rc->info->signal[id].bit, reg_offset); |
| } |
| |
| return 0; |
| } |
| |
| static int aspeed_reset_status(struct reset_controller_dev *rcdev, unsigned long id) |
| { |
| struct aspeed_reset *rc = to_aspeed_reset(rcdev); |
| void __iomem *reg_offset = rc->base + rc->info->signal[id].offset; |
| |
| return (readl(reg_offset) & rc->info->signal[id].bit) ? 1 : 0; |
| } |
| |
| static const struct reset_control_ops aspeed_reset_ops = { |
| .assert = aspeed_reset_assert, |
| .deassert = aspeed_reset_deassert, |
| .status = aspeed_reset_status, |
| }; |
| |
| static int aspeed_reset_probe(struct auxiliary_device *adev, |
| const struct auxiliary_device_id *id) |
| { |
| struct aspeed_reset *reset; |
| struct device *dev = &adev->dev; |
| |
| reset = devm_kzalloc(dev, sizeof(*reset), GFP_KERNEL); |
| if (!reset) |
| return -ENOMEM; |
| |
| spin_lock_init(&reset->lock); |
| |
| reset->info = (struct aspeed_reset_info *)id->driver_data; |
| reset->rcdev.owner = THIS_MODULE; |
| reset->rcdev.nr_resets = reset->info->nr_resets; |
| reset->rcdev.ops = &aspeed_reset_ops; |
| reset->rcdev.of_node = dev->parent->of_node; |
| reset->rcdev.dev = dev; |
| reset->rcdev.of_reset_n_cells = 1; |
| reset->base = (void __iomem *)adev->dev.platform_data; |
| |
| return devm_reset_controller_register(dev, &reset->rcdev); |
| } |
| |
| static const struct aspeed_reset_info ast2700_reset0_info = { |
| .nr_resets = ARRAY_SIZE(ast2700_reset0_signals), |
| .signal = ast2700_reset0_signals, |
| }; |
| |
| static const struct aspeed_reset_info ast2700_reset1_info = { |
| .nr_resets = ARRAY_SIZE(ast2700_reset1_signals), |
| .signal = ast2700_reset1_signals, |
| }; |
| |
| static const struct auxiliary_device_id aspeed_reset_ids[] = { |
| { .name = "clk_ast2700.reset0", .driver_data = (kernel_ulong_t)&ast2700_reset0_info }, |
| { .name = "clk_ast2700.reset1", .driver_data = (kernel_ulong_t)&ast2700_reset1_info }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(auxiliary, aspeed_reset_ids); |
| |
| static struct auxiliary_driver aspeed_reset_driver = { |
| .probe = aspeed_reset_probe, |
| .id_table = aspeed_reset_ids, |
| }; |
| |
| module_auxiliary_driver(aspeed_reset_driver); |
| |
| MODULE_AUTHOR("Ryan Chen <ryan_chen@aspeedtech.com>"); |
| MODULE_DESCRIPTION("ASPEED SoC Reset Controller Driver"); |
| MODULE_LICENSE("GPL"); |
