drivers/media/pci/mantis/mantis_hif.c - vendor/opensource/backports - Git at Google

 /*
 	Mantis PCI bridge driver

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

 	This program is free software; you can redistribute it and/or modify
 	it under the terms of the GNU General Public License as published by
 	the Free Software Foundation; either version 2 of the License, or
 	(at your option) any later version.

 	This program is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 	GNU General Public License for more details.

 	You should have received a copy of the GNU General Public License
 	along with this program; if not, write to the Free Software
 	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

 #include <linux/kernel.h>
 #include <linux/signal.h>
 #include <linux/sched.h>

 #include <linux/interrupt.h>
 #include <asm/io.h>

 #include "dmxdev.h"
 #include "dvbdev.h"
 #include "dvb_demux.h"
 #include "dvb_frontend.h"
 #include "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);
 }
	/*
	Mantis PCI bridge driver

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

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <linux/kernel.h>
	#include <linux/signal.h>
	#include <linux/sched.h>

	#include <linux/interrupt.h>
	#include <asm/io.h>

	#include "dmxdev.h"
	#include "dvbdev.h"
	#include "dvb_demux.h"
	#include "dvb_frontend.h"
	#include "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);
	}