dm: core: Create a new header file for 'compat' features

[thirdparty/u-boot.git] / arch / x86 / cpu / apollolake / fsp_s.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2019 Google LLC
 * Written by Simon Glass <sjg@chromium.org>
 */

#include <common.h>
#include <acpi_s3.h>
#include <binman.h>
#include <dm.h>
#include <irq.h>
#include <malloc.h>
#include <asm/intel_pinctrl.h>
#include <asm/io.h>
#include <asm/intel_regs.h>
#include <asm/msr.h>
#include <asm/msr-index.h>
#include <asm/pci.h>
#include <asm/arch/cpu.h>
#include <asm/arch/systemagent.h>
#include <asm/arch/fsp/fsp_configs.h>
#include <asm/arch/fsp/fsp_s_upd.h>

#define PCH_P2SB_E0		0xe0
#define HIDE_BIT		BIT(0)

#define INTEL_GSPI_MAX		3
#define INTEL_I2C_DEV_MAX	8
#define MAX_USB2_PORTS		8

enum {
	CHIPSET_LOCKDOWN_FSP = 0, /* FSP handles locking per UPDs */
	CHIPSET_LOCKDOWN_COREBOOT, /* coreboot handles locking */
};

enum i2c_speed {
	I2C_SPEED_STANDARD	= 100000,
	I2C_SPEED_FAST		= 400000,
	I2C_SPEED_FAST_PLUS	= 1000000,
	I2C_SPEED_HIGH		= 3400000,
	I2C_SPEED_FAST_ULTRA	= 5000000,
};

/*
 * Timing values are in units of clock period, with the clock speed
 * provided by the SOC
 *
 * TODO(sjg@chromium.org): Connect this up to the I2C driver
 */
struct dw_i2c_speed_config {
	enum i2c_speed speed;
	/* SCL high and low period count */
	u16 scl_lcnt;
	u16 scl_hcnt;
	/*
	 * SDA hold time should be 300ns in standard and fast modes
	 * and long enough for deterministic logic level change in
	 * fast-plus and high speed modes.
	 *
	 *  [15:0] SDA TX Hold Time
	 * [23:16] SDA RX Hold Time
	 */
	u32 sda_hold;
};

/* Serial IRQ control. SERIRQ_QUIET is the default (0) */
enum serirq_mode {
	SERIRQ_QUIET,
	SERIRQ_CONTINUOUS,
	SERIRQ_OFF,
};

/*
 * This I2C controller has support for 3 independent speed configs but can
 * support both FAST_PLUS and HIGH speeds through the same set of speed
 * config registers.  These are treated separately so the speed config values
 * can be provided via ACPI to the OS.
 */
#define DW_I2C_SPEED_CONFIG_COUNT	4

struct dw_i2c_bus_config {
	/* Bus should be enabled in TPL with temporary base */
	int early_init;
	/* Bus speed in Hz, default is I2C_SPEED_FAST (400 KHz) */
	enum i2c_speed speed;
	/*
	 * If rise_time_ns is non-zero the calculations for lcnt and hcnt
	 * registers take into account the times of the bus. However, if
	 * there is a match in speed_config those register values take
	 * precedence
	 */
	int rise_time_ns;
	int fall_time_ns;
	int data_hold_time_ns;
	/* Specific bus speed configuration */
	struct dw_i2c_speed_config speed_config[DW_I2C_SPEED_CONFIG_COUNT];
};

struct gspi_cfg {
	/* Bus speed in MHz */
	u32 speed_mhz;
	/* Bus should be enabled prior to ramstage with temporary base */
	u8 early_init;
};

/*
 * This structure will hold data required by common blocks.
 * These are soc specific configurations which will be filled by soc.
 * We'll fill this structure once during init and use the data in common block.
 */
struct soc_intel_common_config {
	int chipset_lockdown;
	struct gspi_cfg gspi[INTEL_GSPI_MAX];
	struct dw_i2c_bus_config i2c[INTEL_I2C_DEV_MAX];
};

enum pnp_settings {
	PNP_PERF,
	PNP_POWER,
	PNP_PERF_POWER,
};

struct usb2_eye_per_port {
	u8 per_port_tx_pe_half;
	u8 per_port_pe_txi_set;
	u8 per_port_txi_set;
	u8 hs_skew_sel;
	u8 usb_tx_emphasis_en;
	u8 per_port_rxi_set;
	u8 hs_npre_drv_sel;
	u8 override_en;
};

struct apl_config {
	/* Common structure containing soc config data required by common code*/
	struct soc_intel_common_config common_soc_config;

	/*
	 * Mapping from PCIe root port to CLKREQ input on the SOC. The SOC has
	 * four CLKREQ inputs, but six root ports. Root ports without an
	 * associated CLKREQ signal must be marked with "CLKREQ_DISABLED"
	 */
	u8 pcie_rp_clkreq_pin[MAX_PCIE_PORTS];

	/* Enable/disable hot-plug for root ports (0 = disable, 1 = enable) */
	u8 pcie_rp_hotplug_enable[MAX_PCIE_PORTS];

	/* De-emphasis enable configuration for each PCIe root port */
	u8 pcie_rp_deemphasis_enable[MAX_PCIE_PORTS];

	/*
	 * [14:8] DDR mode Number of dealy elements.Each = 125pSec.
	 * [6:0] SDR mode Number of dealy elements.Each = 125pSec.
	 */
	u32 emmc_tx_cmd_cntl;

	/*
	 * [14:8] HS400 mode Number of dealy elements.Each = 125pSec.
	 * [6:0] SDR104/HS200 mode Number of dealy elements.Each = 125pSec.
	 */
	u32 emmc_tx_data_cntl1;

	/*
	 * [30:24] SDR50 mode Number of dealy elements.Each = 125pSec.
	 * [22:16] DDR50 mode Number of dealy elements.Each = 125pSec.
	 * [14:8] SDR25/HS50 mode Number of dealy elements.Each = 125pSec.
	 * [6:0] SDR12/Compatibility mode Number of dealy elements.
	 *       Each = 125pSec.
	 */
	u32 emmc_tx_data_cntl2;

	/*
	 * [30:24] SDR50 mode Number of dealy elements.Each = 125pSec.
	 * [22:16] DDR50 mode Number of dealy elements.Each = 125pSec.
	 * [14:8] SDR25/HS50 mode Number of dealy elements.Each = 125pSec.
	 * [6:0] SDR12/Compatibility mode Number of dealy elements.
	 *       Each = 125pSec.
	 */
	u32 emmc_rx_cmd_data_cntl1;

	/*
	 * [14:8] HS400 mode 1 Number of dealy elements.Each = 125pSec.
	 * [6:0] HS400 mode 2 Number of dealy elements.Each = 125pSec.
	 */
	u32 emmc_rx_strobe_cntl;

	/*
	 * [13:8] Auto Tuning mode Number of dealy elements.Each = 125pSec.
	 * [6:0] SDR104/HS200 Number of dealy elements.Each = 125pSec.
	 */
	u32 emmc_rx_cmd_data_cntl2;

	/* Select the eMMC max speed allowed */
	u32 emmc_host_max_speed;

	/* Specifies on which IRQ the SCI will internally appear */
	u32 sci_irq;

	/* Configure serial IRQ (SERIRQ) line */
	enum serirq_mode serirq_mode;

	/* Configure LPSS S0ix Enable */
	bool lpss_s0ix_enable;

	/* Enable DPTF support */
	bool dptf_enable;

	/* TCC activation offset value in degrees Celsius */
	int tcc_offset;

	/*
	 * Configure Audio clk gate and power gate
	 * IOSF-SB port ID 92 offset 0x530 [5] and [3]
	 */
	bool hdaudio_clk_gate_enable;
	bool hdaudio_pwr_gate_enable;
	bool hdaudio_bios_config_lockdown;

	/* SLP S3 minimum assertion width */
	int slp_s3_assertion_width_usecs;

	/* GPIO pin for PERST_0 */
	u32 prt0_gpio;

	/* USB2 eye diagram settings per port */
	struct usb2_eye_per_port usb2eye[MAX_USB2_PORTS];

	/* GPIO SD card detect pin */
	unsigned int sdcard_cd_gpio;

	/*
	 * PRMRR size setting with three options
	 *  0x02000000 - 32MiB
	 *  0x04000000 - 64MiB
	 *  0x08000000 - 128MiB
	 */
	u32 PrmrrSize;

	/*
	 * Enable SGX feature.
	 * Enabling SGX feature is 2 step process,
	 * (1) set sgx_enable = 1
	 * (2) set PrmrrSize to supported size
	 */
	bool sgx_enable;

	/*
	 * Select PNP Settings.
	 * (0) Performance,
	 * (1) Power
	 * (2) Power & Performance
	 */
	enum pnp_settings pnp_settings;

	/*
	 * PMIC PCH_PWROK delay configuration - IPC Configuration
	 * Upd for changing PCH_PWROK delay configuration : I2C_Slave_Address
	 * (31:24) + Register_Offset (23:16) + OR Value (15:8) + AND Value (7:0)
	 */
	u32 pmic_pmc_ipc_ctrl;

	/*
	 * Options to disable XHCI Link Compliance Mode. Default is FALSE to not
	 * disable Compliance Mode. Set TRUE to disable Compliance Mode.
	 * 0:FALSE(Default), 1:True.
	 */
	bool disable_compliance_mode;

	/*
	 * Options to change USB3 ModPhy setting for the Integrated Filter (IF)
	 * value. Default is 0 to not changing default IF value (0x12). Set
	 * value with the range from 0x01 to 0xff to change IF value.
	 */
	u32 mod_phy_if_value;

	/*
	 * Options to bump USB3 LDO voltage. Default is FALSE to not increasing
	 * LDO voltage. Set TRUE to increase LDO voltage with 40mV.
	 * 0:FALSE (default), 1:True.
	 */
	bool mod_phy_voltage_bump;

	/*
	 * Options to adjust PMIC Vdd2 voltage. Default is 0 to not adjusting
	 * the PMIC Vdd2 default voltage 1.20v. Upd for changing Vdd2 Voltage
	 * configuration: I2C_Slave_Address (31:23) + Register_Offset (23:16)
	 * + OR Value (15:8) + AND Value (7:0) through BUCK5_VID[3:2]:
	 * 00=1.10v, 01=1.15v, 10=1.24v, 11=1.20v (default).
	 */
	u32 pmic_vdd2_voltage;

	/* Option to enable VTD feature */
	bool enable_vtd;
};

static int get_config(struct udevice *dev, struct apl_config *apl)
{
	const u8 *ptr;
	ofnode node;
	u32 emmc[4];
	int ret;

	memset(apl, '\0', sizeof(*apl));

	node = dev_read_subnode(dev, "fsp-s");
	if (!ofnode_valid(node))
		return log_msg_ret("fsp-s settings", -ENOENT);

	ptr = ofnode_read_u8_array_ptr(node, "pcie-rp-clkreq-pin",
				       MAX_PCIE_PORTS);
	if (!ptr)
		return log_msg_ret("pcie-rp-clkreq-pin", -EINVAL);
	memcpy(apl->pcie_rp_clkreq_pin, ptr, MAX_PCIE_PORTS);

	ret = ofnode_read_u32(node, "prt0-gpio", &apl->prt0_gpio);
	if (ret)
		return log_msg_ret("prt0-gpio", ret);
	ret = ofnode_read_u32(node, "sdcard-cd-gpio", &apl->sdcard_cd_gpio);
	if (ret)
		return log_msg_ret("sdcard-cd-gpio", ret);

	ret = ofnode_read_u32_array(node, "emmc", emmc, ARRAY_SIZE(emmc));
	if (ret)
		return log_msg_ret("emmc", ret);
	apl->emmc_tx_data_cntl1 = emmc[0];
	apl->emmc_tx_data_cntl2 = emmc[1];
	apl->emmc_rx_cmd_data_cntl1 = emmc[2];
	apl->emmc_rx_cmd_data_cntl2 = emmc[3];

	apl->dptf_enable = ofnode_read_bool(node, "dptf-enable");

	apl->hdaudio_clk_gate_enable = ofnode_read_bool(node,
						"hdaudio-clk-gate-enable");
	apl->hdaudio_pwr_gate_enable = ofnode_read_bool(node,
						"hdaudio-pwr-gate-enable");
	apl->hdaudio_bios_config_lockdown = ofnode_read_bool(node,
					     "hdaudio-bios-config-lockdown");
	apl->lpss_s0ix_enable = ofnode_read_bool(node, "lpss-s0ix-enable");

	/* Santa */
	apl->usb2eye[1].per_port_pe_txi_set = 7;
	apl->usb2eye[1].per_port_txi_set = 2;

	return 0;
}

static void apl_fsp_silicon_init_params_cb(struct apl_config *apl,
					   struct fsp_s_config *cfg)
{
	u8 port;

	for (port = 0; port < MAX_USB2_PORTS; port++) {
		if (apl->usb2eye[port].per_port_tx_pe_half)
			cfg->port_usb20_per_port_tx_pe_half[port] =
				apl->usb2eye[port].per_port_tx_pe_half;

		if (apl->usb2eye[port].per_port_pe_txi_set)
			cfg->port_usb20_per_port_pe_txi_set[port] =
				apl->usb2eye[port].per_port_pe_txi_set;

		if (apl->usb2eye[port].per_port_txi_set)
			cfg->port_usb20_per_port_txi_set[port] =
				apl->usb2eye[port].per_port_txi_set;

		if (apl->usb2eye[port].hs_skew_sel)
			cfg->port_usb20_hs_skew_sel[port] =
				apl->usb2eye[port].hs_skew_sel;

		if (apl->usb2eye[port].usb_tx_emphasis_en)
			cfg->port_usb20_i_usb_tx_emphasis_en[port] =
				apl->usb2eye[port].usb_tx_emphasis_en;

		if (apl->usb2eye[port].per_port_rxi_set)
			cfg->port_usb20_per_port_rxi_set[port] =
				apl->usb2eye[port].per_port_rxi_set;

		if (apl->usb2eye[port].hs_npre_drv_sel)
			cfg->port_usb20_hs_npre_drv_sel[port] =
				apl->usb2eye[port].hs_npre_drv_sel;
	}
}

int fsps_update_config(struct udevice *dev, ulong rom_offset,
		       struct fsps_upd *upd)
{
	struct fsp_s_config *cfg = &upd->config;
	struct apl_config *apl;
	struct binman_entry vbt;
	void *buf;
	int ret;

	ret = binman_entry_find("intel-vbt", &vbt);
	if (ret)
		return log_msg_ret("Cannot find VBT", ret);
	vbt.image_pos += rom_offset;
	buf = malloc(vbt.size);
	if (!buf)
		return log_msg_ret("Alloc VBT", -ENOMEM);

	/*
	 * Load VBT before devicetree-specific config. This only supports
	 * memory-mapped SPI at present.
	 */
	bootstage_start(BOOTSTAGE_ID_ACCUM_MMAP_SPI, "mmap_spi");
	memcpy(buf, (void *)vbt.image_pos, vbt.size);
	bootstage_accum(BOOTSTAGE_ID_ACCUM_MMAP_SPI);
	if (*(u32 *)buf != VBT_SIGNATURE)
		return log_msg_ret("VBT signature", -EINVAL);
	cfg->graphics_config_ptr = (ulong)buf;

	apl = malloc(sizeof(*apl));
	if (!apl)
		return log_msg_ret("config", -ENOMEM);
	get_config(dev, apl);

	cfg->ish_enable = 0;
	cfg->enable_sata = 0;
	cfg->pcie_root_port_en[2] = 0;
	cfg->pcie_rp_hot_plug[2] = 0;
	cfg->pcie_root_port_en[3] = 0;
	cfg->pcie_rp_hot_plug[3] = 0;
	cfg->pcie_root_port_en[4] = 0;
	cfg->pcie_rp_hot_plug[4] = 0;
	cfg->pcie_root_port_en[5] = 0;
	cfg->pcie_rp_hot_plug[5] = 0;
	cfg->pcie_root_port_en[1] = 0;
	cfg->pcie_rp_hot_plug[1] = 0;
	cfg->usb_otg = 0;
	cfg->i2c6_enable = 0;
	cfg->i2c7_enable = 0;
	cfg->hsuart3_enable = 0;
	cfg->spi1_enable = 0;
	cfg->spi2_enable = 0;
	cfg->sdio_enabled = 0;

	memcpy(cfg->pcie_rp_clk_req_number, apl->pcie_rp_clkreq_pin,
	       sizeof(cfg->pcie_rp_clk_req_number));

	memcpy(cfg->pcie_rp_hot_plug, apl->pcie_rp_hotplug_enable,
	       sizeof(cfg->pcie_rp_hot_plug));

	switch (apl->serirq_mode) {
	case SERIRQ_QUIET:
		cfg->sirq_enable = 1;
		cfg->sirq_mode = 0;
		break;
	case SERIRQ_CONTINUOUS:
		cfg->sirq_enable = 1;
		cfg->sirq_mode = 1;
		break;
	case SERIRQ_OFF:
	default:
		cfg->sirq_enable = 0;
		break;
	}

	if (apl->emmc_tx_cmd_cntl)
		cfg->emmc_tx_cmd_cntl = apl->emmc_tx_cmd_cntl;
	if (apl->emmc_tx_data_cntl1)
		cfg->emmc_tx_data_cntl1 = apl->emmc_tx_data_cntl1;
	if (apl->emmc_tx_data_cntl2)
		cfg->emmc_tx_data_cntl2 = apl->emmc_tx_data_cntl2;
	if (apl->emmc_rx_cmd_data_cntl1)
		cfg->emmc_rx_cmd_data_cntl1 = apl->emmc_rx_cmd_data_cntl1;
	if (apl->emmc_rx_strobe_cntl)
		cfg->emmc_rx_strobe_cntl = apl->emmc_rx_strobe_cntl;
	if (apl->emmc_rx_cmd_data_cntl2)
		cfg->emmc_rx_cmd_data_cntl2 = apl->emmc_rx_cmd_data_cntl2;
	if (apl->emmc_host_max_speed)
		cfg->e_mmc_host_max_speed = apl->emmc_host_max_speed;

	cfg->lpss_s0ix_enable = apl->lpss_s0ix_enable;

	cfg->skip_mp_init = true;

	/* Disable setting of EISS bit in FSP */
	cfg->spi_eiss = 0;

	/* Disable FSP from locking access to the RTC NVRAM */
	cfg->rtc_lock = 0;

	/* Enable Audio clk gate and power gate */
	cfg->hd_audio_clk_gate = apl->hdaudio_clk_gate_enable;
	cfg->hd_audio_pwr_gate = apl->hdaudio_pwr_gate_enable;
	/* Bios config lockdown Audio clk and power gate */
	cfg->bios_cfg_lock_down = apl->hdaudio_bios_config_lockdown;
	apl_fsp_silicon_init_params_cb(apl, cfg);

	cfg->usb_otg = true;
	cfg->vtd_enable = apl->enable_vtd;

	return 0;
}

static void p2sb_set_hide_bit(pci_dev_t dev, int hide)
{
	pci_x86_clrset_config(dev, PCH_P2SB_E0 + 1, HIDE_BIT,
			      hide ? HIDE_BIT : 0, PCI_SIZE_8);
}

/* Configure package power limits */
static int set_power_limits(struct udevice *dev)
{
	msr_t rapl_msr_reg, limit;
	u32 power_unit;
	u32 tdp, min_power, max_power;
	u32 pl2_val;
	u32 override_tdp[2];
	int ret;

	/* Get units */
	rapl_msr_reg = msr_read(MSR_PKG_POWER_SKU_UNIT);
	power_unit = 1 << (rapl_msr_reg.lo & 0xf);

	/* Get power defaults for this SKU */
	rapl_msr_reg = msr_read(MSR_PKG_POWER_SKU);
	tdp = rapl_msr_reg.lo & PKG_POWER_LIMIT_MASK;
	pl2_val = rapl_msr_reg.hi & PKG_POWER_LIMIT_MASK;
	min_power = (rapl_msr_reg.lo >> 16) & PKG_POWER_LIMIT_MASK;
	max_power = rapl_msr_reg.hi & PKG_POWER_LIMIT_MASK;

	if (min_power > 0 && tdp < min_power)
		tdp = min_power;

	if (max_power > 0 && tdp > max_power)
		tdp = max_power;

	ret = dev_read_u32_array(dev, "tdp-pl-override-mw", override_tdp,
				 ARRAY_SIZE(override_tdp));
	if (ret)
		return log_msg_ret("tdp-pl-override-mw", ret);

	/* Set PL1 override value */
	if (override_tdp[0])
		tdp = override_tdp[0] * power_unit / 1000;

	/* Set PL2 override value */
	if (override_tdp[1])
		pl2_val = override_tdp[1] * power_unit / 1000;

	/* Set long term power limit to TDP */
	limit.lo = tdp & PKG_POWER_LIMIT_MASK;
	/* Set PL1 Pkg Power clamp bit */
	limit.lo |= PKG_POWER_LIMIT_CLAMP;

	limit.lo |= PKG_POWER_LIMIT_EN;
	limit.lo |= (MB_POWER_LIMIT1_TIME_DEFAULT &
		PKG_POWER_LIMIT_TIME_MASK) << PKG_POWER_LIMIT_TIME_SHIFT;

	/* Set short term power limit PL2 */
	limit.hi = pl2_val & PKG_POWER_LIMIT_MASK;
	limit.hi |= PKG_POWER_LIMIT_EN;

	/* Program package power limits in RAPL MSR */
	msr_write(MSR_PKG_POWER_LIMIT, limit);
	log_info("RAPL PL1 %d.%dW\n", tdp / power_unit,
		 100 * (tdp % power_unit) / power_unit);
	log_info("RAPL PL2 %d.%dW\n", pl2_val / power_unit,
		 100 * (pl2_val % power_unit) / power_unit);

	/*
	 * Sett RAPL MMIO register for Power limits. RAPL driver is using MSR
	 * instead of MMIO, so disable LIMIT_EN bit for MMIO
	 */
	writel(limit.lo & ~PKG_POWER_LIMIT_EN, MCHBAR_REG(MCHBAR_RAPL_PPL));
	writel(limit.hi & ~PKG_POWER_LIMIT_EN, MCHBAR_REG(MCHBAR_RAPL_PPL + 4));

	return 0;
}

int p2sb_unhide(void)
{
	pci_dev_t dev = PCI_BDF(0, 0xd, 0);
	ulong val;

	p2sb_set_hide_bit(dev, 0);

	pci_x86_read_config(dev, PCI_VENDOR_ID, &val, PCI_SIZE_16);

	if (val != PCI_VENDOR_ID_INTEL)
		return log_msg_ret("p2sb unhide", -EIO);

	return 0;
}

/* Overwrites the SCI IRQ if another IRQ number is given by device tree */
static void set_sci_irq(void)
{
	/* Skip this for now */
}

int arch_fsps_preinit(void)
{
	struct udevice *itss;
	int ret;

	ret = uclass_first_device_err(UCLASS_IRQ, &itss);
	if (ret)
		return log_msg_ret("no itss", ret);
	/*
	 * Snapshot the current GPIO IRQ polarities. FSP is setting a default
	 * policy that doesn't honour boards' requirements
	 */
	irq_snapshot_polarities(itss);

	/*
	 * Clear the GPI interrupt status and enable registers. These
	 * registers do not get reset to default state when booting from S5.
	 */
	ret = pinctrl_gpi_clear_int_cfg();
	if (ret)
		return log_msg_ret("gpi_clear", ret);

	return 0;
}

int arch_fsp_init_r(void)
{
#ifdef CONFIG_HAVE_ACPI_RESUME
	bool s3wake = gd->arch.prev_sleep_state == ACPI_S3;
#else
	bool s3wake = false;
#endif
	struct udevice *dev, *itss;
	int ret;

	/*
	 * This must be called before any devices are probed. Put any probing
	 * into arch_fsps_preinit() above.
	 *
	 * We don't use CONFIG_APL_BOOT_FROM_FAST_SPI_FLASH here since it will
	 * force PCI to be probed.
	 */
	ret = fsp_silicon_init(s3wake, false);
	if (ret)
		return ret;

	ret = uclass_first_device_err(UCLASS_IRQ, &itss);
	if (ret)
		return log_msg_ret("no itss", ret);
	/* Restore GPIO IRQ polarities back to previous settings */
	irq_restore_polarities(itss);

	/* soc_init() */
	ret = p2sb_unhide();
	if (ret)
		return log_msg_ret("unhide p2sb", ret);

	/* Set RAPL MSR for Package power limits*/
	ret = uclass_first_device_err(UCLASS_NORTHBRIDGE, &dev);
	if (ret)
		return log_msg_ret("Cannot get northbridge", ret);
	set_power_limits(dev);

	/*
	 * FSP-S routes SCI to IRQ 9. With the help of this function you can
	 * select another IRQ for SCI.
	 */
	set_sci_irq();

	return 0;
}