V4L/DVB (13741): [Mantis] Implement HIF Mem Read/Write operations

Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 139 insertions, 0 deletions

diff --git a/drivers/media/dvb/mantis/mantis_hif.c b/drivers/media/dvb/mantis/mantis_hif.c
new file mode 100644
index 00000000000..1472008e257
--- /dev/null
+++ b/drivers/media/dvb/mantis/mantis_hif.c
@@ -0,0 +1,139 @@
+/*
+	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);
+}