Orange Pi5 kernel

// 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);
}