// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Mantis PCI bridge driver
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Copyright (C) Manu Abraham (abraham.manu@gmail.com)
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*/
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#include <linux/kernel.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <asm/io.h>
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#include <media/dmxdev.h>
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#include <media/dvbdev.h>
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#include <media/dvb_demux.h>
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#include <media/dvb_frontend.h>
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#include <media/dvb_net.h>
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#include "mantis_common.h"
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#include "mantis_hif.h"
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#include "mantis_link.h" /* temporary due to physical layer stuff */
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#include "mantis_reg.h"
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static int mantis_hif_sbuf_opdone_wait(struct mantis_ca *ca)
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{
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struct mantis_pci *mantis = ca->ca_priv;
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int rc = 0;
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if (wait_event_timeout(ca->hif_opdone_wq,
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ca->hif_event & MANTIS_SBUF_OPDONE,
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msecs_to_jiffies(500)) == -ERESTARTSYS) {
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Smart buffer operation timeout !", mantis->num);
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rc = -EREMOTEIO;
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}
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dprintk(MANTIS_DEBUG, 1, "Smart Buffer Operation complete");
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ca->hif_event &= ~MANTIS_SBUF_OPDONE;
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return rc;
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}
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static int mantis_hif_write_wait(struct mantis_ca *ca)
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{
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struct mantis_pci *mantis = ca->ca_priv;
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u32 opdone = 0, timeout = 0;
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int rc = 0;
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if (wait_event_timeout(ca->hif_write_wq,
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mantis->gpif_status & MANTIS_GPIF_WRACK,
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msecs_to_jiffies(500)) == -ERESTARTSYS) {
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Write ACK timed out !", mantis->num);
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rc = -EREMOTEIO;
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}
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dprintk(MANTIS_DEBUG, 1, "Write Acknowledged");
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mantis->gpif_status &= ~MANTIS_GPIF_WRACK;
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while (!opdone) {
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opdone = (mmread(MANTIS_GPIF_STATUS) & MANTIS_SBUF_OPDONE);
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udelay(500);
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timeout++;
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if (timeout > 100) {
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Write operation timed out!", mantis->num);
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rc = -ETIMEDOUT;
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break;
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}
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}
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dprintk(MANTIS_DEBUG, 1, "HIF Write success");
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return rc;
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}
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int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr)
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{
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struct mantis_pci *mantis = ca->ca_priv;
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u32 hif_addr = 0, data, count = 4;
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dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Read", mantis->num);
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mutex_lock(&ca->ca_lock);
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hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
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hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
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hif_addr |= MANTIS_HIF_STATUS;
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hif_addr |= addr;
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mmwrite(hif_addr, MANTIS_GPIF_BRADDR);
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mmwrite(count, MANTIS_GPIF_BRBYTES);
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udelay(20);
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mmwrite(hif_addr | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR);
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if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed", mantis->num);
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mutex_unlock(&ca->ca_lock);
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return -EREMOTEIO;
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}
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data = mmread(MANTIS_GPIF_DIN);
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mutex_unlock(&ca->ca_lock);
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dprintk(MANTIS_DEBUG, 1, "Mem Read: 0x%02x", data);
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return (data >> 24) & 0xff;
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}
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int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data)
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{
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struct mantis_slot *slot = ca->slot;
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struct mantis_pci *mantis = ca->ca_priv;
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u32 hif_addr = 0;
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dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Write", mantis->num);
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mutex_lock(&ca->ca_lock);
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hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
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hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
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hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
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hif_addr |= MANTIS_HIF_STATUS;
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hif_addr |= addr;
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mmwrite(slot->slave_cfg, MANTIS_GPIF_CFGSLA); /* Slot0 alone for now */
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mmwrite(hif_addr, MANTIS_GPIF_ADDR);
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mmwrite(data, MANTIS_GPIF_DOUT);
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if (mantis_hif_write_wait(ca) != 0) {
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
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mutex_unlock(&ca->ca_lock);
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return -EREMOTEIO;
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}
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dprintk(MANTIS_DEBUG, 1, "Mem Write: (0x%02x to 0x%02x)", data, addr);
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mutex_unlock(&ca->ca_lock);
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return 0;
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}
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int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr)
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{
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struct mantis_pci *mantis = ca->ca_priv;
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u32 data, hif_addr = 0;
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dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Read", mantis->num);
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mutex_lock(&ca->ca_lock);
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hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
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hif_addr |= MANTIS_GPIF_PCMCIAIOM;
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hif_addr |= MANTIS_HIF_STATUS;
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hif_addr |= addr;
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mmwrite(hif_addr, MANTIS_GPIF_BRADDR);
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mmwrite(1, MANTIS_GPIF_BRBYTES);
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udelay(20);
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mmwrite(hif_addr | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR);
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if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
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mutex_unlock(&ca->ca_lock);
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return -EREMOTEIO;
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}
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data = mmread(MANTIS_GPIF_DIN);
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dprintk(MANTIS_DEBUG, 1, "I/O Read: 0x%02x", data);
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udelay(50);
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mutex_unlock(&ca->ca_lock);
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return (u8) data;
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}
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int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data)
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{
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struct mantis_pci *mantis = ca->ca_priv;
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u32 hif_addr = 0;
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dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Write", mantis->num);
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mutex_lock(&ca->ca_lock);
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hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
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hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
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hif_addr |= MANTIS_GPIF_PCMCIAIOM;
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hif_addr |= MANTIS_HIF_STATUS;
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hif_addr |= addr;
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mmwrite(hif_addr, MANTIS_GPIF_ADDR);
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mmwrite(data, MANTIS_GPIF_DOUT);
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if (mantis_hif_write_wait(ca) != 0) {
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
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mutex_unlock(&ca->ca_lock);
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return -EREMOTEIO;
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}
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dprintk(MANTIS_DEBUG, 1, "I/O Write: (0x%02x to 0x%02x)", data, addr);
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mutex_unlock(&ca->ca_lock);
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udelay(50);
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return 0;
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}
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int mantis_hif_init(struct mantis_ca *ca)
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{
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struct mantis_slot *slot = ca->slot;
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struct mantis_pci *mantis = ca->ca_priv;
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u32 irqcfg;
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slot[0].slave_cfg = 0x70773028;
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Initializing Mantis Host Interface", mantis->num);
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mutex_lock(&ca->ca_lock);
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irqcfg = mmread(MANTIS_GPIF_IRQCFG);
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irqcfg = MANTIS_MASK_BRRDY |
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MANTIS_MASK_WRACK |
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MANTIS_MASK_EXTIRQ |
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MANTIS_MASK_WSTO |
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MANTIS_MASK_OTHERR |
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MANTIS_MASK_OVFLW;
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mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
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mutex_unlock(&ca->ca_lock);
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return 0;
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}
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void mantis_hif_exit(struct mantis_ca *ca)
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{
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struct mantis_pci *mantis = ca->ca_priv;
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u32 irqcfg;
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dprintk(MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface", mantis->num);
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mutex_lock(&ca->ca_lock);
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irqcfg = mmread(MANTIS_GPIF_IRQCFG);
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irqcfg &= ~MANTIS_MASK_BRRDY;
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mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
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mutex_unlock(&ca->ca_lock);
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}
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