root/drivers/media/pci/mantis/hopper_cards.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
        Hopper PCI bridge driver

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

*/

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <asm/irq.h>
#include <linux/interrupt.h>

#include <media/dmxdev.h>
#include <media/dvbdev.h>
#include <media/dvb_demux.h>
#include <media/dvb_frontend.h>
#include <media/dvb_net.h>

#include "mantis_common.h"
#include "hopper_vp3028.h"
#include "mantis_dma.h"
#include "mantis_dvb.h"
#include "mantis_uart.h"
#include "mantis_ioc.h"
#include "mantis_pci.h"
#include "mantis_i2c.h"
#include "mantis_reg.h"

static unsigned int verbose;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose, "verbose startup messages, default is 0 (no)");

#define DRIVER_NAME     "Hopper"

static char *label[10] = {
        "DMA",
        "IRQ-0",
        "IRQ-1",
        "OCERR",
        "PABRT",
        "RIPRR",
        "PPERR",
        "FTRGT",
        "RISCI",
        "RACK"
};

static int devs;

static irqreturn_t hopper_irq_handler(int irq, void *dev_id)
{
        u32 stat = 0, mask = 0;
        u32 rst_stat = 0, rst_mask = 0;

        struct mantis_pci *mantis;
        struct mantis_ca *ca;

        mantis = (struct mantis_pci *) dev_id;
        if (unlikely(!mantis))
                return IRQ_NONE;
        ca = mantis->mantis_ca;

        stat = mmread(MANTIS_INT_STAT);
        mask = mmread(MANTIS_INT_MASK);
        if (!(stat & mask))
                return IRQ_NONE;

        rst_mask  = MANTIS_GPIF_WRACK  |
                    MANTIS_GPIF_OTHERR |
                    MANTIS_SBUF_WSTO   |
                    MANTIS_GPIF_EXTIRQ;

        rst_stat  = mmread(MANTIS_GPIF_STATUS);
        rst_stat &= rst_mask;
        mmwrite(rst_stat, MANTIS_GPIF_STATUS);

        mantis->mantis_int_stat = stat;
        mantis->mantis_int_mask = mask;
        dprintk(MANTIS_DEBUG, 0, "\n-- Stat=<%02x> Mask=<%02x> --", stat, mask);
        if (stat & MANTIS_INT_RISCEN) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[0]);
        }
        if (stat & MANTIS_INT_IRQ0) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[1]);
                mantis->gpif_status = rst_stat;
                wake_up(&ca->hif_write_wq);
                schedule_work(&ca->hif_evm_work);
        }
        if (stat & MANTIS_INT_IRQ1) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[2]);
                spin_lock(&mantis->intmask_lock);
                mmwrite(mmread(MANTIS_INT_MASK) & ~MANTIS_INT_IRQ1,
                        MANTIS_INT_MASK);
                spin_unlock(&mantis->intmask_lock);
                schedule_work(&mantis->uart_work);
        }
        if (stat & MANTIS_INT_OCERR) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[3]);
        }
        if (stat & MANTIS_INT_PABORT) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[4]);
        }
        if (stat & MANTIS_INT_RIPERR) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[5]);
        }
        if (stat & MANTIS_INT_PPERR) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[6]);
        }
        if (stat & MANTIS_INT_FTRGT) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[7]);
        }
        if (stat & MANTIS_INT_RISCI) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[8]);
                mantis->busy_block = (stat & MANTIS_INT_RISCSTAT) >> 28;
                queue_work(system_bh_wq, &mantis->bh_work);
        }
        if (stat & MANTIS_INT_I2CDONE) {
                dprintk(MANTIS_DEBUG, 0, "<%s>", label[9]);
                wake_up(&mantis->i2c_wq);
        }
        mmwrite(stat, MANTIS_INT_STAT);
        stat &= ~(MANTIS_INT_RISCEN   | MANTIS_INT_I2CDONE |
                  MANTIS_INT_I2CRACK  | MANTIS_INT_PCMCIA7 |
                  MANTIS_INT_PCMCIA6  | MANTIS_INT_PCMCIA5 |
                  MANTIS_INT_PCMCIA4  | MANTIS_INT_PCMCIA3 |
                  MANTIS_INT_PCMCIA2  | MANTIS_INT_PCMCIA1 |
                  MANTIS_INT_PCMCIA0  | MANTIS_INT_IRQ1    |
                  MANTIS_INT_IRQ0     | MANTIS_INT_OCERR   |
                  MANTIS_INT_PABORT   | MANTIS_INT_RIPERR  |
                  MANTIS_INT_PPERR    | MANTIS_INT_FTRGT   |
                  MANTIS_INT_RISCI);

        if (stat)
                dprintk(MANTIS_DEBUG, 0, "<Unknown> Stat=<%02x> Mask=<%02x>", stat, mask);

        dprintk(MANTIS_DEBUG, 0, "\n");
        return IRQ_HANDLED;
}

static int hopper_pci_probe(struct pci_dev *pdev,
                            const struct pci_device_id *pci_id)
{
        struct mantis_pci_drvdata *drvdata;
        struct mantis_pci *mantis;
        struct mantis_hwconfig *config;
        int err;

        mantis = kzalloc_obj(*mantis);
        if (!mantis) {
                err = -ENOMEM;
                goto fail0;
        }

        drvdata                 = (void *)pci_id->driver_data;
        mantis->num             = devs;
        mantis->verbose         = verbose;
        mantis->pdev            = pdev;
        config                  = drvdata->hwconfig;
        config->irq_handler     = &hopper_irq_handler;
        mantis->hwconfig        = config;
        mantis->rc_map_name     = drvdata->rc_map_name;

        spin_lock_init(&mantis->intmask_lock);

        err = mantis_pci_init(mantis);
        if (err) {
                dprintk(MANTIS_ERROR, 1, "ERROR: Mantis PCI initialization failed <%d>", err);
                goto fail1;
        }

        err = mantis_stream_control(mantis, STREAM_TO_HIF);
        if (err < 0) {
                dprintk(MANTIS_ERROR, 1, "ERROR: Mantis stream control failed <%d>", err);
                goto fail1;
        }

        err = mantis_i2c_init(mantis);
        if (err < 0) {
                dprintk(MANTIS_ERROR, 1, "ERROR: Mantis I2C initialization failed <%d>", err);
                goto fail2;
        }

        err = mantis_get_mac(mantis);
        if (err < 0) {
                dprintk(MANTIS_ERROR, 1, "ERROR: Mantis MAC address read failed <%d>", err);
                goto fail2;
        }

        err = mantis_dma_init(mantis);
        if (err < 0) {
                dprintk(MANTIS_ERROR, 1, "ERROR: Mantis DMA initialization failed <%d>", err);
                goto fail3;
        }

        err = mantis_dvb_init(mantis);
        if (err < 0) {
                dprintk(MANTIS_ERROR, 1, "ERROR: Mantis DVB initialization failed <%d>", err);
                goto fail4;
        }
        devs++;

        return err;

fail4:
        dprintk(MANTIS_ERROR, 1, "ERROR: Mantis DMA exit! <%d>", err);
        mantis_dma_exit(mantis);

fail3:
        dprintk(MANTIS_ERROR, 1, "ERROR: Mantis I2C exit! <%d>", err);
        mantis_i2c_exit(mantis);

fail2:
        dprintk(MANTIS_ERROR, 1, "ERROR: Mantis PCI exit! <%d>", err);
        mantis_pci_exit(mantis);

fail1:
        dprintk(MANTIS_ERROR, 1, "ERROR: Mantis free! <%d>", err);
        kfree(mantis);

fail0:
        return err;
}

static void hopper_pci_remove(struct pci_dev *pdev)
{
        struct mantis_pci *mantis = pci_get_drvdata(pdev);

        if (mantis) {
                mantis_dvb_exit(mantis);
                mantis_dma_exit(mantis);
                mantis_i2c_exit(mantis);
                mantis_pci_exit(mantis);
                kfree(mantis);
        }
        return;

}

static const struct pci_device_id hopper_pci_table[] = {
        MAKE_ENTRY(TWINHAN_TECHNOLOGIES, MANTIS_VP_3028_DVB_T, &vp3028_config,
                   NULL),
        { }
};

MODULE_DEVICE_TABLE(pci, hopper_pci_table);

static struct pci_driver hopper_pci_driver = {
        .name           = DRIVER_NAME,
        .id_table       = hopper_pci_table,
        .probe          = hopper_pci_probe,
        .remove         = hopper_pci_remove,
};

module_pci_driver(hopper_pci_driver);

MODULE_DESCRIPTION("HOPPER driver");
MODULE_AUTHOR("Manu Abraham");
MODULE_LICENSE("GPL");