diff options
| -rw-r--r-- | src/soc/intel/common/block/uart/chip.h | 15 | ||||
| -rw-r--r-- | src/soc/intel/common/block/uart/uart.c | 161 |
2 files changed, 176 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/uart/chip.h b/src/soc/intel/common/block/uart/chip.h new file mode 100644 index 0000000000..5981126fa9 --- /dev/null +++ b/src/soc/intel/common/block/uart/chip.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <stdint.h> +/* Indirect include for static.c: */ +#include <device/pci_ids.h> + +#ifndef _SOC_INTEL_COMMON_BLOCK_UART_CHIP_H_ +#define _SOC_INTEL_COMMON_BLOCK_UART_CHIP_H_ + +struct soc_intel_common_block_uart_config { + /* The Device ID read from config space at offset[2:4] when not hidden */ + u16 devid; +}; + +#endif /* _SOC_INTEL_COMMON_BLOCK_UART_CHIP_H_ */ diff --git a/src/soc/intel/common/block/uart/uart.c b/src/soc/intel/common/block/uart/uart.c index ed4f9c62f7..5507663a5a 100644 --- a/src/soc/intel/common/block/uart/uart.c +++ b/src/soc/intel/common/block/uart/uart.c @@ -1,6 +1,7 @@ /* 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> @@ -12,7 +13,9 @@ #include <intelblocks/uart.h> #include <soc/pci_devs.h> #include <soc/iomap.h> +#include <soc/irq.h> #include <soc/nvs.h> +#include "chip.h" #define UART_PCI_ENABLE (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER) #define UART_CONSOLE_INVALID_INDEX 0xFF @@ -225,11 +228,156 @@ static void uart_common_enable_resources(struct device *dev) } } +static void uart_acpi_write_irq(const struct device *dev) +{ + struct acpi_irq irq; + + switch (dev->path.pci.devfn) { + case PCH_DEVFN_UART0: + irq = (struct acpi_irq)ACPI_IRQ_LEVEL_LOW(LPSS_UART0_IRQ); + break; + case PCH_DEVFN_UART1: + irq = (struct acpi_irq)ACPI_IRQ_LEVEL_LOW(LPSS_UART1_IRQ); + break; + case PCH_DEVFN_UART2: + irq = (struct acpi_irq)ACPI_IRQ_LEVEL_LOW(LPSS_UART2_IRQ); + break; + default: + return; + } + + acpi_device_write_interrupt(&irq); +} + +/* + * 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"); + acpigen_write_STA(acpi_device_status(dev)); + + /* 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_DEVICE_ID_INTEL_APL_UART0: + return "80865abc"; + case PCI_DEVICE_ID_INTEL_APL_UART1: + return "80865abe"; + case PCI_DEVICE_ID_INTEL_APL_UART2: + return "80865ac0"; + case PCI_DEVICE_ID_INTEL_GLK_UART0: + return "808631bc"; + case PCI_DEVICE_ID_INTEL_GLK_UART1: + return "808631be"; + case PCI_DEVICE_ID_INTEL_GLK_UART2: + return "808631c0"; + case PCI_DEVICE_ID_INTEL_GLK_UART3: + return "808631ee"; + case PCI_DEVICE_ID_INTEL_SPT_UART0: + case PCI_DEVICE_ID_INTEL_SPT_H_UART0: + return "INT3448"; + case PCI_DEVICE_ID_INTEL_SPT_UART1: + case PCI_DEVICE_ID_INTEL_SPT_H_UART1: + return "INT3449"; + case PCI_DEVICE_ID_INTEL_SPT_UART2: + case PCI_DEVICE_ID_INTEL_SPT_H_UART2: + return "INT344A"; + case PCI_DEVICE_ID_INTEL_CNP_H_UART0: + return "INT34B8"; + case PCI_DEVICE_ID_INTEL_CNP_H_UART1: + return "INT34B9"; + case PCI_DEVICE_ID_INTEL_CNP_H_UART2: + return "INT34BA"; + default: + return NULL; + } +} + +static const char *uart_acpi_name(const struct device *dev) +{ + switch (dev->device) { + case PCI_DEVICE_ID_INTEL_APL_UART0: + case PCI_DEVICE_ID_INTEL_GLK_UART0: + case PCI_DEVICE_ID_INTEL_SPT_UART0: + case PCI_DEVICE_ID_INTEL_SPT_H_UART0: + case PCI_DEVICE_ID_INTEL_CNP_H_UART0: + return "UAR0"; + case PCI_DEVICE_ID_INTEL_APL_UART1: + case PCI_DEVICE_ID_INTEL_GLK_UART1: + case PCI_DEVICE_ID_INTEL_SPT_UART1: + case PCI_DEVICE_ID_INTEL_SPT_H_UART1: + case PCI_DEVICE_ID_INTEL_CNP_H_UART1: + return "UAR1"; + case PCI_DEVICE_ID_INTEL_APL_UART2: + case PCI_DEVICE_ID_INTEL_GLK_UART2: + case PCI_DEVICE_ID_INTEL_SPT_UART2: + case PCI_DEVICE_ID_INTEL_SPT_H_UART2: + case PCI_DEVICE_ID_INTEL_CNP_H_UART2: + return "UAR2"; + case PCI_DEVICE_ID_INTEL_GLK_UART3: + return "UAR3"; + default: + return NULL; + } +} + static struct device_operations device_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[] = { @@ -296,4 +444,17 @@ static const struct pci_driver pch_uart __pci_driver = { .vendor = PCI_VENDOR_ID_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 = &device_ops; + dev->device = conf ? conf->devid : 0; +} + +struct chip_operations soc_intel_common_block_uart_ops = { + CHIP_NAME("LPSS UART in ACPI mode") + .enable_dev = uart_enable +}; + #endif /* ENV_RAMSTAGE */ |