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