/* SPDX-License-Identifier: GPL-2.0-only */

#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "chip.h"
#include "i82801gx.h"

static void ide_init(struct device *dev)
{
	u16 ideTimingConfig;
	u32 reg32;
	u32 enable_primary, enable_secondary;

	/* Get the chip configuration */
	const struct southbridge_intel_i82801gx_config *config = dev->chip_info;

	printk(BIOS_DEBUG, "i82801gx_ide: initializing...");
	if (config == nullptr) {
		printk(BIOS_ERR, "\ni82801gx_ide: Not mentioned in devicetree.cb!\n");
		// Trying to set somewhat safe defaults instead of bailing out.
		enable_primary = enable_secondary = 1;
	} else {
		enable_primary = config->ide_enable_primary;
		enable_secondary = config->ide_enable_secondary;
	}

	pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MASTER);

	/* Native Capable, but not enabled. */
	pci_write_config8(dev, 0x09, 0x8a);

	ideTimingConfig = pci_read_config16(dev, IDE_TIM_PRI);
	ideTimingConfig &= ~IDE_DECODE_ENABLE;
	ideTimingConfig |= IDE_SITRE;
	if (enable_primary) {
		/* Enable primary IDE interface. */
		ideTimingConfig |= IDE_DECODE_ENABLE;
		ideTimingConfig |= IDE_ISP_3_CLOCKS;
		ideTimingConfig |= IDE_RCT_1_CLOCKS;
		ideTimingConfig |= IDE_IE0;
		ideTimingConfig |= IDE_TIME0; // TIME0
		printk(BIOS_DEBUG, " IDE0");
	}
	pci_write_config16(dev, IDE_TIM_PRI, ideTimingConfig);

	ideTimingConfig = pci_read_config16(dev, IDE_TIM_SEC);
	ideTimingConfig &= ~IDE_DECODE_ENABLE;
	ideTimingConfig |= IDE_SITRE;
	if (enable_secondary) {
		/* Enable secondary IDE interface. */
		ideTimingConfig |= IDE_DECODE_ENABLE;
		ideTimingConfig |= IDE_ISP_3_CLOCKS;
		ideTimingConfig |= IDE_RCT_1_CLOCKS;
		ideTimingConfig |= IDE_IE0;
		ideTimingConfig |= IDE_TIME0;
		printk(BIOS_DEBUG, " IDE1");
	}
	pci_write_config16(dev, IDE_TIM_SEC, ideTimingConfig);

	/* Set IDE I/O Configuration */
	reg32 = 0;
	/* FIXME: only set FAST_* for ata/100, only ?CBx for ata/66 */
	if (enable_primary)
		reg32 |= SIG_MODE_PRI_NORMAL | FAST_PCB0 | PCB0 | FAST_PCB1 | PCB1;
	if (enable_secondary)
		reg32 |= SIG_MODE_SEC_NORMAL | FAST_SCB0 | SCB0 | FAST_SCB1 | SCB1;
	pci_write_config32(dev, IDE_CONFIG, reg32);

	/* Set Interrupt Line */
	/* Interrupt Pin is set by D31IP.PIP */
	pci_write_config32(dev, INTR_LN, 0xff); /* Int 15 */

	printk(BIOS_DEBUG, "\n");
}

static struct device_operations ide_ops = {
	.read_resources		= pci_dev_read_resources,
	.set_resources		= pci_dev_set_resources,
	.enable_resources	= pci_dev_enable_resources,
	.init			= ide_init,
	.enable			= i82801gx_enable,
	.ops_pci		= &pci_dev_ops_pci,
};

/* 82801GB/GR/GDH/GBM/GHM/GU (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH/ICH7-U) */
static const struct pci_driver i82801gx_ide __pci_driver = {
	.ops	= &ide_ops,
	.vendor	= PCI_VID_INTEL,
	.device	= 0x27df,
};