// SPDX-License-Identifier: GPL-2.0-or-later
/*
	Mantis PCI bridge driver

	Copyright (C) Manu Abraham (abraham.manu@gmail.com)

*/

#include "mantis_common.h"
#include "mantis_core.h"
#include "mantis_vp1033.h"
#include "mantis_vp1034.h"
#include "mantis_vp1041.h"
#include "mantis_vp2033.h"
#include "mantis_vp2040.h"
#include "mantis_vp3030.h"

static int read_eeprom_byte(struct mantis_pci *mantis, u8 *data, u8 length)
{
	int err;
	struct i2c_msg msg[] = {
		{
			.addr = 0x50,
			.flags = 0,
			.buf = data,
			.len = 1
		}, {
			.addr = 0x50,
			.flags = I2C_M_RD,
			.buf = data,
			.len = length
		},
	};

	err = i2c_transfer(&mantis->adapter, msg, 2);
	if (err < 0) {
		dprintk(verbose, MANTIS_ERROR, 1,
			"ERROR: i2c read: < err=%i d0=0x%02x d1=0x%02x >",
			err, data[0], data[1]);

		return err;
	}

	return 0;
}

static int get_mac_address(struct mantis_pci *mantis)
{
	int err;

	mantis->mac_address[0] = 0x08;
	err = read_eeprom_byte(mantis, &mantis->mac_address[0], 6);
	if (err < 0) {
		dprintk(verbose, MANTIS_ERROR, 1, "Mantis EEPROM read error");

		return err;
	}
	dprintk(verbose, MANTIS_ERROR, 0,
		"    MAC Address=[%pM]\n", mantis->mac_address);

	return 0;
}

#define MANTIS_MODEL_UNKNOWN	"UNKNOWN"
#define MANTIS_DEV_UNKNOWN	"UNKNOWN"

struct mantis_hwconfig unknown_device = {
	.model_name	= MANTIS_MODEL_UNKNOWN,
	.dev_type	= MANTIS_DEV_UNKNOWN,
};

static void mantis_load_config(struct mantis_pci *mantis)
{
	switch (mantis->subsystem_device) {
	case MANTIS_VP_1033_DVB_S:	/* VP-1033 */
		mantis->hwconfig = &vp1033_mantis_config;
		break;
	case MANTIS_VP_1034_DVB_S:	/* VP-1034 */
		mantis->hwconfig = &vp1034_mantis_config;
		break;
	case MANTIS_VP_1041_DVB_S2:	/* VP-1041 */
	case TECHNISAT_SKYSTAR_HD2:
		mantis->hwconfig = &vp1041_mantis_config;
		break;
	case MANTIS_VP_2033_DVB_C:	/* VP-2033 */
		mantis->hwconfig = &vp2033_mantis_config;
		break;
	case MANTIS_VP_2040_DVB_C:	/* VP-2040 */
	case CINERGY_C:	/* VP-2040 clone */
	case TECHNISAT_CABLESTAR_HD2:
		mantis->hwconfig = &vp2040_mantis_config;
		break;
	case MANTIS_VP_3030_DVB_T:	/* VP-3030 */
		mantis->hwconfig = &vp3030_mantis_config;
		break;
	default:
		mantis->hwconfig = &unknown_device;
		break;
	}
}

int mantis_core_init(struct mantis_pci *mantis)
{
	int err = 0;

	mantis_load_config(mantis);
	dprintk(verbose, MANTIS_ERROR, 0, "found a %s PCI %s device on (%02x:%02x.%x),\n",
		mantis->hwconfig->model_name, mantis->hwconfig->dev_type,
		mantis->pdev->bus->number, PCI_SLOT(mantis->pdev->devfn), PCI_FUNC(mantis->pdev->devfn));
	dprintk(verbose, MANTIS_ERROR, 0, "    Mantis Rev %d [%04x:%04x], ",
		mantis->revision,
		mantis->subsystem_vendor, mantis->subsystem_device);
	dprintk(verbose, MANTIS_ERROR, 0,
		"irq: %d, latency: %d\n    memory: 0x%lx, mmio: 0x%p\n",
		mantis->pdev->irq, mantis->latency,
		mantis->mantis_addr, mantis->mantis_mmio);

	err = mantis_i2c_init(mantis);
	if (err < 0) {
		dprintk(verbose, MANTIS_ERROR, 1, "Mantis I2C init failed");
		return err;
	}
	err = get_mac_address(mantis);
	if (err < 0) {
		dprintk(verbose, MANTIS_ERROR, 1, "get MAC address failed");
		return err;
	}
	err = mantis_dma_init(mantis);
	if (err < 0) {
		dprintk(verbose, MANTIS_ERROR, 1, "Mantis DMA init failed");
		return err;
	}
	err = mantis_dvb_init(mantis);
	if (err < 0) {
		dprintk(verbose, MANTIS_DEBUG, 1, "Mantis DVB init failed");
		return err;
	}
	err = mantis_uart_init(mantis);
	if (err < 0) {
		dprintk(verbose, MANTIS_DEBUG, 1, "Mantis UART init failed");
		return err;
	}

	return 0;
}

int mantis_core_exit(struct mantis_pci *mantis)
{
	mantis_dma_stop(mantis);
	dprintk(verbose, MANTIS_ERROR, 1, "DMA engine stopping");

	mantis_uart_exit(mantis);
	dprintk(verbose, MANTIS_ERROR, 1, "UART exit failed");

	if (mantis_dma_exit(mantis) < 0)
		dprintk(verbose, MANTIS_ERROR, 1, "DMA exit failed");
	if (mantis_dvb_exit(mantis) < 0)
		dprintk(verbose, MANTIS_ERROR, 1, "DVB exit failed");
	if (mantis_i2c_exit(mantis) < 0)
		dprintk(verbose, MANTIS_ERROR, 1, "I2C adapter delete.. failed");

	return 0;
}

/* Turn the given bit on or off. */
void gpio_set_bits(struct mantis_pci *mantis, u32 bitpos, u8 value)
{
	u32 cur;

	cur = mmread(MANTIS_GPIF_ADDR);
	if (value)
		mantis->gpio_status = cur | (1 << bitpos);
	else
		mantis->gpio_status = cur & (~(1 << bitpos));

	mmwrite(mantis->gpio_status, MANTIS_GPIF_ADDR);
	mmwrite(0x00, MANTIS_GPIF_DOUT);
	udelay(100);
}

/* direction = 0 , no CI passthrough ; 1 , CI passthrough */
void mantis_set_direction(struct mantis_pci *mantis, int direction)
{
	u32 reg;

	reg = mmread(0x28);
	dprintk(verbose, MANTIS_DEBUG, 1, "TS direction setup");
	if (direction == 0x01) {
		/* to CI */
		reg |= 0x04;
		mmwrite(reg, 0x28);
		reg &= 0xff - 0x04;
		mmwrite(reg, 0x28);
	} else {
		reg &= 0xff - 0x04;
		mmwrite(reg, 0x28);
		reg |= 0x04;
		mmwrite(reg, 0x28);
	}
}