| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpi.h> |
| #include <acpi/acpigen.h> |
| #include <acpi/acpi_gnvs.h> |
| #include <console/uart.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ops.h> |
| #include <intelblocks/irq.h> |
| #include <intelblocks/lpss.h> |
| #include <intelblocks/uart.h> |
| #include <soc/pci_devs.h> |
| #include <soc/iomap.h> |
| #include <soc/nvs.h> |
| #include "chip.h" |
| |
| #define UART_PCI_ENABLE (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER) |
| |
| extern const unsigned int uart_devices[]; |
| extern const int uart_devices_size; |
| |
| static void uart_lpss_init(pci_devfn_t dev, uintptr_t baseaddr) |
| { |
| /* Ensure controller is in D0 state */ |
| lpss_set_power_state(dev, STATE_D0); |
| |
| /* Take UART out of reset */ |
| lpss_reset_release(baseaddr); |
| |
| /* Set M and N divisor inputs and enable clock */ |
| lpss_clk_update(baseaddr, CONFIG_SOC_INTEL_COMMON_LPSS_UART_CLK_M_VAL, |
| CONFIG_SOC_INTEL_COMMON_LPSS_UART_CLK_N_VAL); |
| } |
| |
| #if CONFIG(INTEL_LPSS_UART_FOR_CONSOLE) |
| uintptr_t uart_platform_base(unsigned int idx) |
| { |
| if (idx == CONFIG_UART_FOR_CONSOLE) |
| return CONFIG_CONSOLE_UART_BASE_ADDRESS; |
| return 0; |
| } |
| #endif |
| |
| static pci_devfn_t uart_console_get_pci_bdf(void) |
| { |
| int devfn; |
| |
| /* |
| * This function will get called even if INTEL_LPSS_UART_FOR_CONSOLE |
| * config option is not selected. |
| * By default return NULL in this case to avoid compilation errors. |
| */ |
| if (!CONFIG(INTEL_LPSS_UART_FOR_CONSOLE)) |
| return PCI_DEV_INVALID; |
| |
| if (CONFIG_UART_FOR_CONSOLE > uart_devices_size) |
| return PCI_DEV_INVALID; |
| |
| devfn = uart_devices[CONFIG_UART_FOR_CONSOLE]; |
| if (devfn == PCI_DEVFN_INVALID) |
| return PCI_DEV_INVALID; |
| |
| return PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn)); |
| } |
| |
| const struct device *uart_get_device(void) |
| { |
| pci_devfn_t dev = uart_console_get_pci_bdf(); |
| if (dev == PCI_DEV_INVALID) |
| return NULL; |
| |
| return pcidev_path_on_root(PCI_DEV2DEVFN(dev)); |
| } |
| |
| bool uart_is_controller_initialized(void) |
| { |
| uintptr_t base; |
| pci_devfn_t dev = uart_console_get_pci_bdf(); |
| |
| if (dev == PCI_DEV_INVALID) |
| return false; |
| |
| base = pci_s_read_config32(dev, PCI_BASE_ADDRESS_0) & ~0xFFF; |
| if (!base) |
| return false; |
| |
| if ((pci_s_read_config16(dev, PCI_COMMAND) & UART_PCI_ENABLE) |
| != UART_PCI_ENABLE) |
| return false; |
| |
| return !lpss_is_controller_in_reset(base); |
| } |
| |
| void uart_bootblock_init(void) |
| { |
| const uint32_t baseaddr = CONFIG_CONSOLE_UART_BASE_ADDRESS; |
| pci_devfn_t dev = uart_console_get_pci_bdf(); |
| |
| if (dev == PCI_DEV_INVALID) |
| return; |
| |
| /* Set UART base address */ |
| pci_s_write_config32(dev, PCI_BASE_ADDRESS_0, baseaddr); |
| |
| /* Enable memory access and bus master */ |
| pci_s_write_config16(dev, PCI_COMMAND, UART_PCI_ENABLE); |
| |
| uart_lpss_init(dev, baseaddr); |
| } |
| |
| #if ENV_RAMSTAGE |
| |
| static void uart_read_resources(struct device *dev) |
| { |
| pci_dev_read_resources(dev); |
| |
| /* Set the configured UART base address for the debug port */ |
| if (CONFIG(INTEL_LPSS_UART_FOR_CONSOLE) && |
| uart_is_debug_controller(dev)) { |
| struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0); |
| /* Need to set the base and size for the resource allocator. */ |
| res->base = CONFIG_CONSOLE_UART_BASE_ADDRESS; |
| res->size = 0x1000; |
| res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | |
| IORESOURCE_FIXED; |
| } |
| /* In ACPI mode mark the decoded region as reserved */ |
| if (dev->hidden) { |
| struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0); |
| res->flags |= IORESOURCE_RESERVE; |
| } |
| } |
| |
| /* |
| * Check if UART debug port controller needs to be initialized on resume. |
| * |
| * Returns: |
| * true = when SoC wants debug port initialization on resume |
| * false = otherwise |
| */ |
| static bool pch_uart_init_debug_controller_on_resume(void) |
| { |
| struct global_nvs *gnvs = acpi_get_gnvs(); |
| |
| if (gnvs) |
| return !!gnvs->uior; |
| |
| return false; |
| } |
| |
| bool uart_is_debug_controller(struct device *dev) |
| { |
| return dev == uart_get_device(); |
| } |
| |
| /* |
| * This is a workaround to enable UART controller for the debug port if: |
| * 1. CONSOLE_SERIAL is not enabled in coreboot, and |
| * 2. This boot is S3 resume, and |
| * 3. SoC wants to initialize debug UART controller. |
| * |
| * This workaround is required because Linux kernel hangs on resume if console |
| * is not enabled in coreboot, but it is enabled in kernel and not suspended. |
| */ |
| static bool uart_controller_needs_init(struct device *dev) |
| { |
| /* |
| * If coreboot has CONSOLE_SERIAL enabled, the skip re-initializing |
| * controller here. |
| */ |
| if (CONFIG(CONSOLE_SERIAL)) |
| return false; |
| |
| /* If this device does not correspond to debug port, then skip. */ |
| if (!uart_is_debug_controller(dev)) |
| return false; |
| |
| /* Initialize UART controller only on S3 resume. */ |
| if (!acpi_is_wakeup_s3()) |
| return false; |
| |
| /* |
| * check if SOC wants to initialize UART on resume |
| */ |
| return pch_uart_init_debug_controller_on_resume(); |
| } |
| |
| static void uart_common_enable_resources(struct device *dev) |
| { |
| pci_dev_enable_resources(dev); |
| |
| if (uart_controller_needs_init(dev)) { |
| uintptr_t base; |
| |
| base = pci_read_config32(dev, PCI_BASE_ADDRESS_0) & ~0xFFF; |
| if (base) |
| uart_lpss_init(PCI_BDF(dev), base); |
| } |
| } |
| |
| static void uart_acpi_write_irq(const struct device *dev) |
| { |
| if (CONFIG(SOC_INTEL_COMMON_BLOCK_IRQ)) { |
| const int irq = get_pci_devfn_irq(dev->path.pci.devfn); |
| if (irq != INVALID_IRQ) { |
| struct acpi_irq airq = (struct acpi_irq)ACPI_IRQ_LEVEL_LOW(irq); |
| acpi_device_write_interrupt(&airq); |
| } |
| } |
| } |
| |
| /* |
| * Generate an ACPI entry if the device is enabled in devicetree for the ACPI |
| * LPSS driver. In this mode the device and vendor ID reads as 0xffff, but the |
| * PCI device is still there. |
| */ |
| static void uart_fill_ssdt(const struct device *dev) |
| { |
| const char *scope = acpi_device_scope(dev); |
| const char *hid = acpi_device_hid(dev); |
| struct resource *res; |
| |
| /* In ACPI mode the device is "invisible" */ |
| if (!dev->hidden) |
| return; |
| |
| if (!scope || !hid) |
| return; |
| |
| res = probe_resource(dev, PCI_BASE_ADDRESS_0); |
| if (!res) |
| return; |
| |
| /* Scope */ |
| acpigen_write_scope(scope); |
| |
| /* Device */ |
| acpigen_write_device(acpi_device_name(dev)); |
| acpigen_write_name_string("_HID", hid); |
| /* |
| * Advertise compatibility to Sunrise Point, as the Linux kernel doesn't support |
| * CannonPoint yet... |
| */ |
| if (strcmp(hid, "INT34B8") == 0) |
| acpigen_write_name_string("_CID", "INT3448"); |
| else if (strcmp(hid, "INT34B9") == 0) |
| acpigen_write_name_string("_CID", "INT3449"); |
| else if (strcmp(hid, "INT34BA") == 0) |
| acpigen_write_name_string("_CID", "INT344A"); |
| |
| acpi_device_write_uid(dev); |
| acpigen_write_name_string("_DDN", "LPSS ACPI UART"); |
| |
| /* Do not hide the UART device from the OS */ |
| acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON); |
| |
| /* Resources */ |
| acpigen_write_name("_CRS"); |
| acpigen_write_resourcetemplate_header(); |
| |
| uart_acpi_write_irq(dev); |
| acpigen_write_mem32fixed(1, res->base, res->size); |
| |
| acpigen_write_resourcetemplate_footer(); |
| |
| acpigen_pop_len(); /* Device */ |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| static const char *uart_acpi_hid(const struct device *dev) |
| { |
| switch (dev->device) { |
| case PCI_DID_INTEL_APL_UART0: |
| return "80865abc"; |
| case PCI_DID_INTEL_APL_UART1: |
| return "80865abe"; |
| case PCI_DID_INTEL_APL_UART2: |
| return "80865ac0"; |
| case PCI_DID_INTEL_GLK_UART0: |
| return "808631bc"; |
| case PCI_DID_INTEL_GLK_UART1: |
| return "808631be"; |
| case PCI_DID_INTEL_GLK_UART2: |
| return "808631c0"; |
| case PCI_DID_INTEL_GLK_UART3: |
| return "808631ee"; |
| case PCI_DID_INTEL_SPT_UART0: |
| case PCI_DID_INTEL_SPT_H_UART0: |
| return "INT3448"; |
| case PCI_DID_INTEL_SPT_UART1: |
| case PCI_DID_INTEL_SPT_H_UART1: |
| return "INT3449"; |
| case PCI_DID_INTEL_SPT_UART2: |
| case PCI_DID_INTEL_SPT_H_UART2: |
| return "INT344A"; |
| case PCI_DID_INTEL_CNP_H_UART0: |
| return "INT34B8"; |
| case PCI_DID_INTEL_CNP_H_UART1: |
| return "INT34B9"; |
| case PCI_DID_INTEL_CNP_H_UART2: |
| return "INT34BA"; |
| default: |
| return NULL; |
| } |
| } |
| |
| static const char *uart_acpi_name(const struct device *dev) |
| { |
| switch (dev->device) { |
| case PCI_DID_INTEL_LNL_UART0: |
| case PCI_DID_INTEL_ADP_P_UART0: |
| case PCI_DID_INTEL_APL_UART0: |
| case PCI_DID_INTEL_GLK_UART0: |
| case PCI_DID_INTEL_SPT_UART0: |
| case PCI_DID_INTEL_SPT_H_UART0: |
| case PCI_DID_INTEL_CNP_H_UART0: |
| return "UAR0"; |
| case PCI_DID_INTEL_LNL_UART1: |
| case PCI_DID_INTEL_ADP_P_UART1: |
| case PCI_DID_INTEL_APL_UART1: |
| case PCI_DID_INTEL_GLK_UART1: |
| case PCI_DID_INTEL_SPT_UART1: |
| case PCI_DID_INTEL_SPT_H_UART1: |
| case PCI_DID_INTEL_CNP_H_UART1: |
| return "UAR1"; |
| case PCI_DID_INTEL_LNL_UART2: |
| case PCI_DID_INTEL_ADP_P_UART2: |
| case PCI_DID_INTEL_APL_UART2: |
| case PCI_DID_INTEL_GLK_UART2: |
| case PCI_DID_INTEL_SPT_UART2: |
| case PCI_DID_INTEL_SPT_H_UART2: |
| case PCI_DID_INTEL_CNP_H_UART2: |
| return "UAR2"; |
| case PCI_DID_INTEL_ADP_P_UART3: |
| case PCI_DID_INTEL_GLK_UART3: |
| return "UAR3"; |
| default: |
| return NULL; |
| } |
| } |
| |
| struct device_operations uart_ops = { |
| .read_resources = uart_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = uart_common_enable_resources, |
| .ops_pci = &pci_dev_ops_pci, |
| .acpi_fill_ssdt = uart_fill_ssdt, |
| .acpi_hid = uart_acpi_hid, |
| .acpi_name = uart_acpi_name, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { |
| PCI_DID_INTEL_LNL_UART0, |
| PCI_DID_INTEL_LNL_UART1, |
| PCI_DID_INTEL_LNL_UART2, |
| PCI_DID_INTEL_MTL_UART0, |
| PCI_DID_INTEL_MTL_UART1, |
| PCI_DID_INTEL_MTL_UART2, |
| PCI_DID_INTEL_APL_UART0, |
| PCI_DID_INTEL_APL_UART1, |
| PCI_DID_INTEL_APL_UART2, |
| PCI_DID_INTEL_APL_UART3, |
| PCI_DID_INTEL_CNL_UART0, |
| PCI_DID_INTEL_CNL_UART1, |
| PCI_DID_INTEL_CNL_UART2, |
| PCI_DID_INTEL_GLK_UART0, |
| PCI_DID_INTEL_GLK_UART1, |
| PCI_DID_INTEL_GLK_UART2, |
| PCI_DID_INTEL_GLK_UART3, |
| PCI_DID_INTEL_CNP_H_UART0, |
| PCI_DID_INTEL_CNP_H_UART1, |
| PCI_DID_INTEL_CNP_H_UART2, |
| PCI_DID_INTEL_ICP_UART0, |
| PCI_DID_INTEL_ICP_UART1, |
| PCI_DID_INTEL_ICP_UART2, |
| PCI_DID_INTEL_CMP_UART0, |
| PCI_DID_INTEL_CMP_UART1, |
| PCI_DID_INTEL_CMP_UART2, |
| PCI_DID_INTEL_CMP_H_UART0, |
| PCI_DID_INTEL_CMP_H_UART1, |
| PCI_DID_INTEL_CMP_H_UART2, |
| PCI_DID_INTEL_TGP_UART0, |
| PCI_DID_INTEL_TGP_UART1, |
| PCI_DID_INTEL_TGP_UART2, |
| PCI_DID_INTEL_TGP_H_UART0, |
| PCI_DID_INTEL_TGP_H_UART1, |
| PCI_DID_INTEL_TGP_H_UART2, |
| PCI_DID_INTEL_TGP_H_UART3, |
| PCI_DID_INTEL_MCC_UART0, |
| PCI_DID_INTEL_MCC_UART1, |
| PCI_DID_INTEL_MCC_UART2, |
| PCI_DID_INTEL_JSP_UART0, |
| PCI_DID_INTEL_JSP_UART1, |
| PCI_DID_INTEL_JSP_UART2, |
| PCI_DID_INTEL_ADP_S_UART0, |
| PCI_DID_INTEL_ADP_S_UART1, |
| PCI_DID_INTEL_ADP_S_UART2, |
| PCI_DID_INTEL_ADP_S_UART3, |
| PCI_DID_INTEL_ADP_S_UART4, |
| PCI_DID_INTEL_ADP_S_UART5, |
| PCI_DID_INTEL_ADP_S_UART6, |
| PCI_DID_INTEL_ADP_P_UART0, |
| PCI_DID_INTEL_ADP_P_UART1, |
| PCI_DID_INTEL_ADP_P_UART2, |
| PCI_DID_INTEL_ADP_P_UART3, |
| PCI_DID_INTEL_ADP_P_UART4, |
| PCI_DID_INTEL_ADP_P_UART5, |
| PCI_DID_INTEL_ADP_P_UART6, |
| PCI_DID_INTEL_ADP_M_N_UART0, |
| PCI_DID_INTEL_ADP_M_N_UART1, |
| PCI_DID_INTEL_ADP_M_N_UART2, |
| PCI_DID_INTEL_ADP_M_N_UART3, |
| PCI_DID_INTEL_RPP_S_UART0, |
| PCI_DID_INTEL_RPP_S_UART1, |
| PCI_DID_INTEL_RPP_S_UART2, |
| PCI_DID_INTEL_RPP_S_UART3, |
| 0, |
| }; |
| |
| static const struct pci_driver pch_uart __pci_driver = { |
| .ops = &uart_ops, |
| .vendor = PCI_VID_INTEL, |
| .devices = pci_device_ids, |
| }; |
| |
| static void uart_enable(struct device *dev) |
| { |
| struct soc_intel_common_block_uart_config *conf = dev->chip_info; |
| dev->ops = &uart_ops; |
| dev->device = conf ? conf->devid : 0; |
| } |
| |
| struct chip_operations soc_intel_common_block_uart_ops = { |
| .name = "LPSS UART in ACPI mode", |
| .enable_dev = uart_enable |
| }; |
| |
| #endif /* ENV_RAMSTAGE */ |