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Commit f684336b authored by Manu Abraham's avatar Manu Abraham Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB (13788): [Mantis CA] use a lock for the relevant CI Read/Write operations 



Signed-off-by: default avatarManu Abraham <manu@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 616f75e1

drivers/media/dvb/mantis/mantis_hif.c

+16 −0
Original line number Diff line number Diff line
@@ -92,6 +92,7 @@ int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr) 
	u32 hif_addr = 0, data, count = 4;



	dprintk(verbose, 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;
@@ -104,9 +105,11 @@ int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr) 


	if (mantis_hif_sbuf_opdone_wait(ca) != 0) {

		dprintk(verbose, 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(verbose, MANTIS_DEBUG, 1, "Mem Read: 0x%02x", data);

	return (data >> 24) & 0xff;

}
@@ -118,6 +121,7 @@ int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data) 
	u32 hif_addr = 0;



	dprintk(verbose, 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;
@@ -130,9 +134,11 @@ int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data) 


	if (mantis_hif_write_wait(ca) != 0) {

		dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);

		mutex_unlock(&ca->ca_lock);

		return -EREMOTEIO;

	}

	dprintk(verbose, MANTIS_DEBUG, 1, "Mem Write: (0x%02x to 0x%02x)", data, addr);

	mutex_unlock(&ca->ca_lock);



	return 0;

}
@@ -143,6 +149,7 @@ int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr) 
	u32 data, hif_addr = 0;



	dprintk(verbose, 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;
@@ -155,11 +162,13 @@ int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr) 


	if (mantis_hif_sbuf_opdone_wait(ca) != 0) {

		dprintk(verbose, 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(verbose, MANTIS_DEBUG, 1, "I/O Read: 0x%02x", data);

	udelay(50);

	mutex_unlock(&ca->ca_lock);



	return (u8) data;

}
@@ -170,6 +179,7 @@ int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data) 
	u32 hif_addr = 0;



	dprintk(verbose, 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;
@@ -181,9 +191,11 @@ int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data) 


	if (mantis_hif_write_wait(ca) != 0) {

		dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);

		mutex_unlock(&ca->ca_lock);

		return -EREMOTEIO;

	}

	dprintk(verbose, MANTIS_DEBUG, 1, "I/O Write: (0x%02x to 0x%02x)", data, addr);

	mutex_unlock(&ca->ca_lock);

	udelay(50);



	return 0;
@@ -201,6 +213,7 @@ int mantis_hif_init(struct mantis_ca *ca) 
	init_waitqueue_head(&ca->hif_opdone_wq);

	init_waitqueue_head(&ca->hif_write_wq);



	mutex_lock(&ca->ca_lock);

	irqcfg = mmread(MANTIS_GPIF_IRQCFG);

	irqcfg = MANTIS_MASK_BRRDY	|

		 MANTIS_MASK_WRACK	|
@@ -210,6 +223,7 @@ int mantis_hif_init(struct mantis_ca *ca) 
		 MANTIS_MASK_OVFLW;



	mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);

	mutex_unlock(&ca->ca_lock);



	return 0;

}
@@ -220,7 +234,9 @@ void mantis_hif_exit(struct mantis_ca *ca) 
	u32 irqcfg;



	dprintk(verbose, 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);

}

drivers/media/dvb/mantis/mantis_link.h

+2 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#ifndef __MANTIS_LINK_H

#define __MANTIS_LINK_H



#include <linux/mutex.h>

#include <linux/workqueue.h>

#include "dvb_ca_en50221.h"
@@ -61,6 +62,7 @@ struct mantis_ca { 
	void				*ca_priv;



	struct dvb_ca_en50221		en50221;

	struct mutex			ca_lock;

};



/* CA */