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/*
Mantis PCI bridge driver
Copyright (C) 2005, 2006 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 "mantis_common.h"
#include "mantis_hif.h"
#include "mantis_link.h" /* temporary due to physical layer stuff */
static int mantis_hif_data_available(struct mantis_ca *ca)
{
struct mantis_pci *mantis = ca->ca_priv;
int rc = 0;
if (wait_event_interruptible_timeout(ca->hif_data_wq,
ca->sbuf_status & MANTIS_SBUF_DATA_AVAIL,
msecs_to_jiffies(500)) == -ERESTARTSYS) {
dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Read wait event timeout !", mantis->num);
rc = -EREMOTEIO;
}
ca->sbuf_status &= ~MANTIS_SBUF_DATA_AVAIL;
udelay(2);
return rc;
}
static int mantis_hif_sbuf_opdone_wait(struct mantis_ca *ca)
{
struct mantis_pci *mantis = ca->ca_priv;
int rc = 0;
if (wait_event_interruptible_timeout(ca->hif_opdone_wq,
ca->hif_event & MANTIS_SBUF_OPDONE,
msecs_to_jiffies(500)) == -ERESTARTSYS) {
dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Smart buffer operation timeout !", mantis->num);
rc = -EREMOTEIO;
}
ca->hif_event &= ~MANTIS_SBUF_OPDONE;
udelay(5);
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;
hif_addr |= MANTIS_GPIF_HIFRDWRN;
hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
hif_addr |= addr;
mmwrite(hif_addr, MANTIS_GPIF_BRADDR);
mmwrite(count, MANTIS_GPIF_BRBYTES);
udelay(20);
mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
if (mantis_hif_data_available(ca) != 0) {
dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer burst read failed", mantis->num);
return -EREMOTEIO;
}
if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed", mantis->num);
return -EREMOTEIO;
}
data = mmread(MANTIS_GPIF_HIFDIN);
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;
hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
hif_addr |= addr;
mmwrite(slot->slave_cfg, MANTIS_GPIF_CFGSLA); /* Slot0 alone for now */
mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
mmwrite(data, MANTIS_GPIF_HIFDOUT);
ca->hif_job_queue = MANTIS_HIF_MEMWR;
if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
ca->hif_job_queue &= ~MANTIS_HIF_MEMWR;
dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
return -EREMOTEIO;
}
ca->hif_job_queue &= ~MANTIS_HIF_MEMWR;
return 0;
}
int mantis_hif_init(struct mantis_ca *ca)
{
struct mantis_pci *mantis = ca->ca_priv;
u32 irqcfg;
dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Initializing Mantis Host Interface", mantis->num);
init_waitqueue_head(&ca->hif_data_wq);
init_waitqueue_head(&ca->hif_opdone_wq);
irqcfg = mmread(MANTIS_GPIF_IRQCFG);
irqcfg |= MANTIS_MASK_BRRDY;
mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
return 0;
}
void mantis_hif_exit(struct mantis_ca *ca)
{
struct mantis_pci *mantis = ca->ca_priv;
u32 irqcfg;
dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface", mantis->num);
irqcfg = mmread(MANTIS_GPIF_IRQCFG);
irqcfg &= ~MANTIS_MASK_BRRDY;
mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
}
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