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drivers/intel/mipi_camera: Add camera power resource to SSDT 

This change adds support function to parse entries in the devicetree to
generate PowerResource entries for the MIPI camera.

Change-Id: I31e198b50acf2c64035aff9cb054fbe3602dd83e
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41624
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Sugnan Prabhu S 2020-05-21 20:41:03 +05:30 committed by Patrick Georgi
parent 4f77f61d2d
commit b087a940a2
2 changed files with 159 additions and 0 deletions
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98
src/drivers/intel/mipi_camera/camera.c
View File

@ -17,6 +17,7 @@
#define DEFAULT_REMOTE_NAME "\\_SB.PCI0.CIO2"
#define CIO2_PCI_DEV 0x14
#define CIO2_PCI_FN 0x3
#define POWER_RESOURCE_NAME "PRIC"
/*
* This implementation assumes there is only 1 endpoint at each end of every data port. It also
@ -435,6 +436,58 @@ static void camera_fill_vcm(const struct device *dev)
acpi_dp_write(dsd);
}
static void fill_power_res_sequence(struct drivers_intel_mipi_camera_config *config,
struct operation_seq *seq)
{
unsigned int i;
uint8_t index;
uint8_t gpio_num;
for (i = 0; i < seq->ops_cnt; i++) {
switch (seq->ops[i].type) {
case IMGCLK:
index = seq->ops[i].index;
if (seq->ops[i].action == ENABLE) {
acpigen_emit_namestring("MCON");
acpigen_write_byte(config->clk_panel.clks[index].clknum);
acpigen_write_byte(config->clk_panel.clks[index].freq);
} else if (seq->ops[i].action == DISABLE) {
acpigen_emit_namestring("MCOF");
acpigen_write_byte(config->clk_panel.clks[index].clknum);
} else {
acpigen_write_debug_string("Unsupported clock action");
printk(BIOS_ERR, "Unsupported clock action: %x\n",
seq->ops[i].action);
printk(BIOS_ERR, "OS camera driver will likely not work");
}
break;
case GPIO:
index = seq->ops[i].index;
gpio_num = config->gpio_panel.gpio[index].gpio_num;
if (seq->ops[i].action == ENABLE) {
acpigen_soc_set_tx_gpio(gpio_num);
} else if (seq->ops[i].action == DISABLE) {
acpigen_soc_clear_tx_gpio(gpio_num);
} else {
acpigen_write_debug_string("Unsupported GPIO action");
printk(BIOS_ERR, "Unsupported GPIO action: %x\n",
seq->ops[i].action);
printk(BIOS_ERR, "OS camera driver will likely not work");
}
break;
default:
printk(BIOS_ERR, "Unsupported power operation: %x\n", seq->ops[i].type);
printk(BIOS_ERR, "OS camera driver will likely not work");
break;
}
if (seq->ops[i].delay_ms)
acpigen_write_sleep(seq->ops[i].delay_ms);
}
}
static void write_pci_camera_device(const struct device *dev)
{
struct drivers_intel_mipi_camera_config *config = dev->chip_info;
@ -467,6 +520,40 @@ static void write_i2c_camera_device(const struct device *dev, const char *scope)
acpigen_write_device(acpi_device_name(dev));
/* add power resource */
if (config->has_power_resource) {
acpigen_write_power_res(POWER_RESOURCE_NAME, 0, 0, NULL, 0);
acpigen_write_name_integer("STA", 0);
acpigen_write_STA_ext("STA");
acpigen_write_method_serialized("_ON", 0);
acpigen_write_if();
acpigen_emit_byte(LEQUAL_OP);
acpigen_emit_namestring("STA");
acpigen_write_integer(0);
fill_power_res_sequence(config, &config->on_seq);
acpigen_write_store_op_to_namestr(1, "STA");
acpigen_pop_len(); /* if */
acpigen_pop_len(); /* _ON */
/* _OFF operations */
acpigen_write_method_serialized("_OFF", 0);
acpigen_write_if();
acpigen_emit_byte(LEQUAL_OP);
acpigen_emit_namestring("STA");
acpigen_write_integer(1);
fill_power_res_sequence(config, &config->off_seq);
acpigen_write_store_op_to_namestr(0, "STA");
acpigen_pop_len(); /* if */
acpigen_pop_len(); /* _ON */
acpigen_pop_len(); /* Power Resource */
}
if (config->device_type == INTEL_ACPI_CAMERA_SENSOR)
acpigen_write_name_integer("_ADR", 0);
@ -519,6 +606,17 @@ static void write_camera_device_common(const struct device *dev)
acpigen_write_name_integer("CAMD", config->device_type);
}
if (config->pr0 || config->has_power_resource) {
acpigen_write_name("_PR0");
acpigen_write_package(1);
if (config->pr0)
acpigen_emit_namestring(config->pr0); /* External power resource */
else
acpigen_emit_namestring(POWER_RESOURCE_NAME);
acpigen_pop_len(); /* _PR0 */
}
switch (config->device_type) {
case INTEL_ACPI_CAMERA_CIO2:
camera_fill_cio2(dev);

61
src/drivers/intel/mipi_camera/chip.h
View File

@ -10,6 +10,18 @@
#define MAX_PWDB_ENTRIES 12
#define MAX_PORT_ENTRIES 4
#define MAX_LINK_FREQ_ENTRIES 4
#define MAX_CLK_CONFIGS 2
#define MAX_GPIO_CONFIGS 4
#define MAX_PWR_OPS 5
#define SEQ_OPS_CLK_ENABLE(ind, delay) \
{ .type = IMGCLK, .index = (ind), .action = ENABLE, .delay_ms = (delay) }
#define SEQ_OPS_CLK_DISABLE(ind, delay) \
{ .type = IMGCLK, .index = (ind), .action = DISABLE, .delay_ms = (delay) }
#define SEQ_OPS_GPIO_ENABLE(ind, delay) \
{ .type = GPIO, .index = (ind), .action = ENABLE, .delay_ms = (delay) }
#define SEQ_OPS_GPIO_DISABLE(ind, delay) \
{ .type = GPIO, .index = (ind), .action = DISABLE, .delay_ms = (delay) }
enum camera_device_type {
DEV_TYPE_SENSOR = 0,
@ -57,6 +69,47 @@ enum intel_power_action_type {
INTEL_ACPI_CAMERA_GPIO,
};
enum ctrl_type {
IMGCLK = 1,
GPIO
};
enum action_type {
ENABLE = 1,
DISABLE
};
struct clk_config {
/* IMGCLKOUT_x being used for a port */
uint8_t clknum;
/* frequency setting: 0:24Mhz, 1:19.2 Mhz */
uint8_t freq;
} __packed;
struct gpio_config {
uint8_t gpio_num;
} __packed;
struct clock_ctrl_panel {
struct clk_config clks[MAX_CLK_CONFIGS];
} __packed;
struct gpio_ctrl_panel {
struct gpio_config gpio[MAX_GPIO_CONFIGS];
} __packed;
struct operation_type {
enum ctrl_type type;
uint8_t index;
enum action_type action;
uint32_t delay_ms;
} __packed;
struct operation_seq {
struct operation_type ops[MAX_PWR_OPS];
uint8_t ops_cnt;
} __packed;
struct intel_ssdb {
uint8_t version; /* Current version */
uint8_t sensor_card_sku; /* CRD Board type */
@ -122,6 +175,11 @@ struct intel_pwdb {
} __packed;
struct drivers_intel_mipi_camera_config {
struct clock_ctrl_panel clk_panel;
struct gpio_ctrl_panel gpio_panel;
struct operation_seq on_seq;
struct operation_seq off_seq;
struct intel_ssdb ssdb;
struct intel_pwdb pwdb[MAX_PWDB_ENTRIES];
enum intel_camera_device_type device_type;
@ -130,6 +188,7 @@ struct drivers_intel_mipi_camera_config {
const char *acpi_name;
const char *chip_name;
unsigned int acpi_uid;
const char *pr0;
/* Settings specific to CIO2 device */
uint32_t cio2_num_ports;
@ -163,6 +222,8 @@ struct drivers_intel_mipi_camera_config {
/* Settings specific to vcm */
const char *vcm_compat;
/* Does the device have a power resource entries */
bool has_power_resource;
};
#endif