| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpi.h> |
| #include <acpi/acpi_device.h> |
| #include <acpi/acpigen.h> |
| #include <console/console.h> |
| #include <device/i2c_simple.h> |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <device/pci_def.h> |
| #include "chip.h" |
| |
| #define SENSOR_NAME_UUID "822ace8f-2814-4174-a56b-5f029fe079ee" |
| #define SENSOR_TYPE_UUID "26257549-9271-4ca4-bb43-c4899d5a4881" |
| #define DEFAULT_ENDPOINT 0 |
| |
| static void camera_fill_sensor_defaults(struct drivers_intel_mipi_camera_config *config) |
| { |
| if (config->disable_ssdb_defaults) |
| return; |
| |
| if (!config->ssdb.platform) |
| config->ssdb.platform = PLATFORM_SKC; |
| |
| if (!config->ssdb.flash_support) |
| config->ssdb.flash_support = FLASH_DISABLE; |
| |
| if (!config->ssdb.privacy_led) |
| config->ssdb.privacy_led = PRIVACY_LED_A_16mA; |
| |
| if (!config->ssdb.mipi_define) |
| config->ssdb.mipi_define = MIPI_INFO_ACPI_DEFINED; |
| |
| if (!config->ssdb.mclk_speed) |
| config->ssdb.mclk_speed = CLK_FREQ_19_2MHZ; |
| } |
| |
| /* |
| * Adds settings for a camera sensor device (typically at "\_SB.PCI0.I2Cx.CAMy"). The drivers |
| * for Linux tends to expect the camera sensor device and any related nvram / vcm devices to be |
| * separate ACPI devices, while the drivers for Windows want all of these to be grouped |
| * together in the camera sensor ACPI device. This implementation tries to satisfy both, |
| * though the unfortunate tradeoff is that the same I2C address for nvram and vcm is advertised |
| * by multiple devices in ACPI (via "_CRS"). The Windows driver can use the "_DSM" method to |
| * disambiguate the I2C resources in the camera sensor ACPI device. Drivers for Windows |
| * typically query "SSDB" for configuration information (represented as a binary blob dump of |
| * struct), while Linux drivers typically consult individual parameters in "_DSD". |
| * |
| * The tree of tables in "_DSD" is analogous to what's used for the "CIO2" device. The _DSD |
| * specifies a child table for the sensor's port (e.g., PRT0 for "port0"--this implementation |
| * assumes a camera only has 1 port). The PRT0 table specifies a table for each endpoint |
| * (though only 1 endpoint is supported by this implementation so the table only has an |
| * "endpoint0" that points to a EP00 table). The EP00 table primarily describes the # of lanes |
| * in "data-lines", a list of frequencies in "list-frequencies", and specifies the name of the |
| * other side in "remote-endpoint" (typically "\_SB.PCI0.CIO2"). |
| */ |
| static void camera_fill_sensor(const struct device *dev) |
| { |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| struct acpi_dp *ep00 = NULL; |
| struct acpi_dp *prt0 = NULL; |
| struct acpi_dp *dsd = NULL; |
| struct acpi_dp *remote = NULL; |
| const char *vcm_name = NULL; |
| struct acpi_dp *lens_focus = NULL; |
| |
| camera_fill_sensor_defaults(config); |
| |
| ep00 = acpi_dp_new_table("EP00"); |
| acpi_dp_add_integer(ep00, "endpoint", DEFAULT_ENDPOINT); |
| acpi_dp_add_integer(ep00, "clock-lanes", 0); |
| |
| if (config->ssdb.lanes_used > 0) { |
| struct acpi_dp *lanes = acpi_dp_new_table("data-lanes"); |
| uint32_t i; |
| for (i = 1; i <= config->ssdb.lanes_used; ++i) |
| acpi_dp_add_integer(lanes, NULL, i); |
| acpi_dp_add_array(ep00, lanes); |
| } |
| |
| if (config->num_freq_entries) { |
| struct acpi_dp *freq = acpi_dp_new_table("link-frequencies"); |
| uint32_t i; |
| for (i = 0; i < config->num_freq_entries && i < MAX_LINK_FREQ_ENTRIES; ++i) |
| acpi_dp_add_integer(freq, NULL, config->link_freq[i]); |
| acpi_dp_add_array(ep00, freq); |
| } |
| |
| remote = acpi_dp_new_table("remote-endpoint"); |
| |
| acpi_dp_add_reference(remote, NULL, config->remote_name); |
| acpi_dp_add_integer(remote, NULL, config->ssdb.link_used); |
| acpi_dp_add_integer(remote, NULL, DEFAULT_ENDPOINT); |
| acpi_dp_add_array(ep00, remote); |
| |
| prt0 = acpi_dp_new_table("PRT0"); |
| |
| acpi_dp_add_integer(prt0, "port", 0); |
| acpi_dp_add_child(prt0, "endpoint0", ep00); |
| dsd = acpi_dp_new_table("_DSD"); |
| |
| acpi_dp_add_integer(dsd, "clock-frequency", config->ssdb.mclk_speed); |
| |
| if (config->ssdb.degree) |
| acpi_dp_add_integer(dsd, "rotation", 180); |
| |
| if (config->ssdb.vcm_type) { |
| if (config->vcm_name) { |
| vcm_name = config->vcm_name; |
| } else { |
| const struct device_path path = { |
| .type = DEVICE_PATH_I2C, |
| .i2c.device = config->vcm_address, |
| }; |
| struct device *vcm_dev = find_dev_path(dev->bus, &path); |
| struct drivers_intel_mipi_camera_config *vcm_config; |
| vcm_config = vcm_dev ? vcm_dev->chip_info : NULL; |
| |
| if (!vcm_config) |
| printk(BIOS_ERR, "Failed to get VCM\n"); |
| else if (vcm_config->device_type != INTEL_ACPI_CAMERA_VCM) |
| printk(BIOS_ERR, "Device isn't VCM\n"); |
| else |
| vcm_name = acpi_device_path(vcm_dev); |
| } |
| } |
| |
| if (vcm_name) { |
| lens_focus = acpi_dp_new_table("lens-focus"); |
| acpi_dp_add_reference(lens_focus, NULL, vcm_name); |
| acpi_dp_add_array(dsd, lens_focus); |
| } |
| |
| acpi_dp_add_child(dsd, "port0", prt0); |
| acpi_dp_write(dsd); |
| |
| acpigen_write_method_serialized("SSDB", 0); |
| acpigen_write_return_byte_buffer((uint8_t *)&config->ssdb, sizeof(config->ssdb)); |
| acpigen_pop_len(); /* Method */ |
| |
| /* Fill Power Sequencing Data */ |
| if (config->num_pwdb_entries > 0) { |
| acpigen_write_method_serialized("PWDB", 0); |
| acpigen_write_return_byte_buffer((uint8_t *)&config->pwdb, |
| sizeof(struct intel_pwdb) * |
| config->num_pwdb_entries); |
| acpigen_pop_len(); /* Method */ |
| } |
| } |
| |
| static void camera_fill_nvm(const struct device *dev) |
| { |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| struct acpi_dp *dsd = acpi_dp_new_table("_DSD"); |
| |
| /* It might be possible to default size or width based on type. */ |
| if (!config->disable_nvm_defaults && !config->nvm_pagesize) |
| config->nvm_pagesize = 1; |
| |
| if (!config->disable_nvm_defaults && !config->nvm_readonly) |
| config->nvm_readonly = 1; |
| |
| if (config->nvm_size) |
| acpi_dp_add_integer(dsd, "size", config->nvm_size); |
| |
| if (config->nvm_pagesize) |
| acpi_dp_add_integer(dsd, "pagesize", config->nvm_pagesize); |
| |
| if (config->nvm_readonly) |
| acpi_dp_add_integer(dsd, "read-only", config->nvm_readonly); |
| |
| if (config->nvm_width) |
| acpi_dp_add_integer(dsd, "address-width", config->nvm_width); |
| |
| acpi_dp_write(dsd); |
| } |
| |
| static void camera_fill_vcm(const struct device *dev) |
| { |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| struct acpi_dp *dsd; |
| |
| if (!config->vcm_compat) |
| return; |
| |
| dsd = acpi_dp_new_table("_DSD"); |
| acpi_dp_add_string(dsd, "compatible", config->vcm_compat); |
| acpi_dp_write(dsd); |
| } |
| |
| static void write_pci_camera_device(const struct device *dev) |
| { |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| |
| if (dev->path.type != DEVICE_PATH_PCI) { |
| printk(BIOS_ERR, "CIO2/IMGU devices require PCI\n"); |
| return; |
| } |
| |
| acpigen_write_device(acpi_device_name(dev)); |
| acpigen_write_ADR_pci_device(dev); |
| acpigen_write_name_string("_DDN", config->device_type == INTEL_ACPI_CAMERA_CIO2 ? |
| "Camera and Imaging Subsystem" : "Imaging Unit"); |
| } |
| |
| static void write_i2c_camera_device(const struct device *dev, const char *scope) |
| { |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| struct acpi_i2c i2c = { |
| .address = dev->path.i2c.device, |
| .mode_10bit = dev->path.i2c.mode_10bit, |
| .speed = I2C_SPEED_FAST, |
| .resource = scope, |
| }; |
| |
| if (dev->path.type != DEVICE_PATH_I2C) { |
| printk(BIOS_ERR, "Non-CIO2/IMGU devices require I2C\n"); |
| return; |
| } |
| |
| acpigen_write_device(acpi_device_name(dev)); |
| |
| if (config->device_type == INTEL_ACPI_CAMERA_SENSOR) |
| acpigen_write_name_integer("_ADR", 0); |
| |
| if (config->acpi_hid) |
| acpigen_write_name_string("_HID", config->acpi_hid); |
| else if (config->device_type == INTEL_ACPI_CAMERA_VCM) |
| acpigen_write_name_string("_HID", ACPI_DT_NAMESPACE_HID); |
| else if (config->device_type == INTEL_ACPI_CAMERA_NVM) |
| acpigen_write_name_string("_HID", "INT3499"); |
| |
| acpigen_write_name_integer("_UID", config->acpi_uid); |
| acpigen_write_name_string("_DDN", config->chip_name); |
| acpigen_write_STA(acpi_device_status(dev)); |
| |
| /* Resources */ |
| acpigen_write_name("_CRS"); |
| acpigen_write_resourcetemplate_header(); |
| acpi_device_write_i2c(&i2c); |
| |
| /* |
| * The optional vcm/nvram devices are presumed to be on the same I2C bus as the camera |
| * sensor. |
| */ |
| if (config->device_type == INTEL_ACPI_CAMERA_SENSOR && |
| config->ssdb.vcm_type && config->vcm_address) { |
| struct acpi_i2c i2c_vcm = i2c; |
| i2c_vcm.address = config->vcm_address; |
| acpi_device_write_i2c(&i2c_vcm); |
| } |
| |
| if (config->device_type == INTEL_ACPI_CAMERA_SENSOR && |
| config->ssdb.rom_type && config->rom_address) { |
| struct acpi_i2c i2c_rom = i2c; |
| i2c_rom.address = config->rom_address; |
| acpi_device_write_i2c(&i2c_rom); |
| } |
| |
| acpigen_write_resourcetemplate_footer(); |
| } |
| |
| static void write_camera_device_common(const struct device *dev) |
| { |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| |
| /* Mark it as Camera related device */ |
| if (config->device_type == INTEL_ACPI_CAMERA_CIO2 || |
| config->device_type == INTEL_ACPI_CAMERA_IMGU || |
| config->device_type == INTEL_ACPI_CAMERA_SENSOR || |
| config->device_type == INTEL_ACPI_CAMERA_VCM) { |
| acpigen_write_name_integer("CAMD", config->device_type); |
| } |
| |
| switch (config->device_type) { |
| case INTEL_ACPI_CAMERA_SENSOR: |
| camera_fill_sensor(dev); |
| break; |
| case INTEL_ACPI_CAMERA_VCM: |
| camera_fill_vcm(dev); |
| break; |
| case INTEL_ACPI_CAMERA_NVM: |
| camera_fill_nvm(dev); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void camera_fill_ssdt(const struct device *dev) |
| { |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| const char *scope = acpi_device_scope(dev); |
| |
| if (!dev->enabled || !scope) |
| return; |
| |
| /* Device */ |
| acpigen_write_scope(scope); |
| |
| if (config->device_type == INTEL_ACPI_CAMERA_CIO2 || |
| config->device_type == INTEL_ACPI_CAMERA_IMGU) |
| write_pci_camera_device(dev); |
| else |
| write_i2c_camera_device(dev, scope); |
| |
| write_camera_device_common(dev); |
| |
| acpigen_pop_len(); /* Device */ |
| acpigen_pop_len(); /* Scope */ |
| |
| if (dev->path.type == DEVICE_PATH_PCI) { |
| printk(BIOS_INFO, "%s: %s PCI address 0%x\n", acpi_device_path(dev), |
| dev->chip_ops->name, dev->path.pci.devfn); |
| } else { |
| printk(BIOS_INFO, "%s: %s I2C address 0%xh\n", acpi_device_path(dev), |
| dev->chip_ops->name, dev->path.i2c.device); |
| } |
| } |
| |
| static const char *camera_acpi_name(const struct device *dev) |
| { |
| const char *prefix = NULL; |
| static char name[5]; |
| struct drivers_intel_mipi_camera_config *config = dev->chip_info; |
| |
| if (config->acpi_name) |
| return config->acpi_name; |
| |
| switch (config->device_type) { |
| case INTEL_ACPI_CAMERA_CIO2: |
| return "CIO2"; |
| case INTEL_ACPI_CAMERA_IMGU: |
| return "IMGU"; |
| case INTEL_ACPI_CAMERA_PMIC: |
| return "PMIC"; |
| case INTEL_ACPI_CAMERA_SENSOR: |
| prefix = "CAM"; |
| break; |
| case INTEL_ACPI_CAMERA_VCM: |
| prefix = "VCM"; |
| break; |
| case INTEL_ACPI_CAMERA_NVM: |
| prefix = "NVM"; |
| break; |
| default: |
| printk(BIOS_ERR, "Invalid device type: %x\n", config->device_type); |
| return NULL; |
| } |
| |
| /* |
| * The camera # knows which link # they use, so that's used as the basis for the |
| * instance #. The VCM and NVM don't have this information, so the best we can go on is |
| * the _UID. |
| */ |
| snprintf(name, sizeof(name), "%s%1u", prefix, |
| config->device_type == INTEL_ACPI_CAMERA_SENSOR ? |
| config->ssdb.link_used : config->acpi_uid); |
| return name; |
| } |
| |
| static struct device_operations camera_ops = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| .acpi_name = camera_acpi_name, |
| .acpi_fill_ssdt = camera_fill_ssdt, |
| }; |
| |
| static void camera_enable(struct device *dev) |
| { |
| dev->ops = &camera_ops; |
| } |
| |
| struct chip_operations drivers_intel_mipi_camera_ops = { |
| CHIP_NAME("Intel MIPI Camera Device") |
| .enable_dev = camera_enable |
| }; |