V4L/DVB (13705): [Mantis] FIX: Do not return IRQ_HANDLED in the unlikely case
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/mantis/mantis_pci.c b/drivers/media/dvb/mantis/mantis_pci.c
new file mode 100644
index 0000000..68ff1b2a0
--- /dev/null
+++ b/drivers/media/dvb/mantis/mantis_pci.c
@@ -0,0 +1,328 @@
+/*
+ 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 <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <linux/kmod.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include "mantis_common.h"
+#include "mantis_core.h"
+
+#include <asm/irq.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+
+unsigned int verbose = 1;
+module_param(verbose, int, 0644);
+MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
+
+unsigned int devs;
+
+#define PCI_VENDOR_ID_MANTIS 0x1822
+#define PCI_DEVICE_ID_MANTIS_R11 0x4e35
+#define DRIVER_NAME "Mantis"
+
+static struct pci_device_id mantis_pci_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_MANTIS, PCI_DEVICE_ID_MANTIS_R11) },
+ { 0 },
+};
+
+MODULE_DEVICE_TABLE(pci, mantis_pci_table);
+
+static irqreturn_t mantis_pci_irq(int irq, void *dev_id)
+{
+ int i = 0, interrupts = 0;
+ u32 stat = 0, mask = 0, lstat = 0, mstat = 0;
+ struct mantis_pci *mantis;
+
+ mantis = (struct mantis_pci *) dev_id;
+ if (unlikely(mantis == NULL)) {
+ dprintk(verbose, MANTIS_ERROR, 1, "Mantis == NULL");
+ return IRQ_NONE;
+ }
+ stat = mmread(MANTIS_INT_STAT);
+ mask = mmread(MANTIS_INT_MASK);
+ mstat = lstat = stat & ~MANTIS_INT_RISCSTAT;
+
+ if (!(stat & mask)) {
+ dprintk(verbose, MANTIS_DEBUG, 1, "Not ours !");
+ return IRQ_NONE;
+ }
+ mmwrite(lstat, MANTIS_INT_STAT);
+ interrupts = hweight32(stat);
+ dprintk(verbose, MANTIS_DEBUG, 0, "=== Interrupts[%04x/%04x]=%d [", stat, mask, interrupts);
+
+ while (lstat) {
+ if (lstat & MANTIS_INT_RISCEN) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* DMA enabl *");
+ lstat &= ~MANTIS_INT_RISCEN;
+
+ } else if (lstat & MANTIS_INT_I2CRACK) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* I2C R-ACK *");
+ mantis->mantis_int_stat = stat;
+ mantis->mantis_int_mask = mask;
+ wake_up(&mantis->i2c_wq);
+ lstat &= ~MANTIS_INT_I2CRACK;
+
+ } else if (lstat & MANTIS_INT_PCMCIA7) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-07 *");
+ lstat &= ~MANTIS_INT_PCMCIA7;
+
+ } else if (lstat & MANTIS_INT_PCMCIA6) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-06 *");
+ lstat &= ~MANTIS_INT_PCMCIA6;
+
+ } else if (lstat & MANTIS_INT_PCMCIA5) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-05 *");
+ lstat &= ~MANTIS_INT_PCMCIA5;
+
+ } else if (lstat & MANTIS_INT_PCMCIA4) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-04 *");
+ lstat &= ~MANTIS_INT_PCMCIA4;
+
+ } else if (lstat & MANTIS_INT_PCMCIA3) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-03 *");
+ lstat &= ~MANTIS_INT_PCMCIA3;
+
+ } else if (lstat & MANTIS_INT_PCMCIA2) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-02 *");
+ lstat &= ~MANTIS_INT_PCMCIA2;
+
+ } else if (lstat & MANTIS_INT_PCMCIA1) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-01 *");
+ lstat &= ~MANTIS_INT_PCMCIA1;
+
+ } else if (lstat & MANTIS_INT_PCMCIA0) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-00 *");
+ lstat &= ~MANTIS_INT_PCMCIA0;
+
+ } else if (lstat & MANTIS_INT_IRQ0) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-0 *");
+ lstat &= ~MANTIS_INT_IRQ0;
+
+ } else if (lstat & MANTIS_INT_IRQ1) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-1 *");
+ lstat &= ~MANTIS_INT_IRQ1;
+
+ } else if (lstat & MANTIS_INT_OCERR) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT OCERR *");
+ lstat &= ~MANTIS_INT_OCERR;
+
+ } else if (lstat & MANTIS_INT_PABORT) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT PABRT *");
+ lstat &= ~MANTIS_INT_PABORT;
+
+ } else if (lstat & MANTIS_INT_RIPERR) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT RIPRR *");
+ lstat &= ~MANTIS_INT_RIPERR;
+
+ } else if (lstat & MANTIS_INT_PPERR) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT PPERR *");
+ lstat &= ~MANTIS_INT_PPERR;
+
+ } else if (lstat & MANTIS_INT_FTRGT) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT FTRGT *");
+ lstat &= ~MANTIS_INT_FTRGT;
+
+ } else if (lstat & MANTIS_INT_RISCI) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* INT RISCI *");
+ mantis->finished_block = (stat & MANTIS_INT_RISCSTAT) >> 28;
+ tasklet_schedule(&mantis->tasklet);
+ lstat &= ~MANTIS_INT_RISCI;
+
+ } else if (lstat & MANTIS_INT_I2CDONE) {
+ dprintk(verbose, MANTIS_DEBUG, 0, "* I2C DONE *");
+ mantis->mantis_int_stat = stat;
+ mantis->mantis_int_mask = mask;
+ lstat &= ~MANTIS_INT_I2CDONE;
+ } else {
+ dprintk(verbose, MANTIS_DEBUG, 0,
+ "* Unknown [%04x/%04x] *", stat, mask);
+ break;
+ }
+ i++;
+ if (i > interrupts) {
+ dprintk(verbose, MANTIS_ERROR, 1, "going Loopy ! -- BREAK --");
+ break;
+ }
+ }
+ dprintk(verbose, MANTIS_DEBUG, 0, "] ===\n");
+
+ return IRQ_HANDLED;
+}
+
+
+static int __devinit mantis_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *mantis_pci_table)
+{
+ u8 revision, latency;
+ struct mantis_pci *mantis;
+ int ret = 0;
+
+ devs++;
+
+ mantis = kmalloc(sizeof (struct mantis_pci), GFP_KERNEL);
+ if (mantis == NULL) {
+ printk("%s: Out of memory\n", __func__);
+ ret = -ENOMEM;
+ goto err;
+ }
+ memset(mantis, 0, sizeof (struct mantis_pci));
+ mantis->num = devs;
+ if (pci_enable_device(pdev)) {
+ dprintk(verbose, MANTIS_ERROR, 1, "Mantis PCI enable failed");
+ ret = -ENODEV;
+ goto err;
+ }
+ mantis->mantis_addr = pci_resource_start(pdev, 0);
+ if (!request_mem_region(pci_resource_start(pdev, 0),
+ pci_resource_len(pdev, 0), DRIVER_NAME)) {
+ ret = -ENODEV;
+ goto err0;
+ }
+
+ if ((mantis->mantis_mmio = ioremap(mantis->mantis_addr, 0x1000)) == NULL) {
+ dprintk(verbose, MANTIS_ERROR, 1, "IO remap failed");
+ ret = -ENODEV;
+ goto err1;
+ }
+
+ // Clear and disable all interrupts at startup
+ // to avoid lockup situations
+ mmwrite(0x00, MANTIS_INT_MASK);
+ if (request_irq(pdev->irq, mantis_pci_irq, IRQF_SHARED | IRQF_DISABLED,
+ DRIVER_NAME, mantis) < 0) {
+
+ dprintk(verbose, MANTIS_ERROR, 1, "Mantis IRQ reg failed");
+ ret = -ENODEV;
+ goto err2;
+ }
+ pci_set_master(pdev);
+ pci_set_drvdata(pdev, mantis);
+ pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency);
+ pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
+ mantis->latency = latency;
+ mantis->revision = revision;
+ mantis->pdev = pdev;
+ init_waitqueue_head(&mantis->i2c_wq);
+
+ // CAM bypass
+ //mmwrite(mmread(MANTIS_INT_MASK) | MANTIS_INT_IRQ1, MANTIS_INT_MASK);
+ dprintk(verbose, MANTIS_INFO, 1, "gpif status: %04x irqcfg: %04x", mmread(0x9c), mmread(0x98));
+ if ((mmread(0x9c) & 0x200) != 0) { //CAM inserted
+ msleep_interruptible(1);
+ if ((mmread(0x9c) & 0x200) != 0)
+ mmwrite(((mmread(0x98) | 0x01) & ~0x02), 0x98);
+ else
+ mmwrite(((mmread(0x98) | 0x02) & ~0x01), 0x98);
+
+ } else {
+ mmwrite(((mmread(0x98) | 0x02) & ~0x01), 0x98);
+ }
+ mantis_set_direction(mantis, 0);
+
+ // default latency if none specified
+ if (!latency)
+ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 32);
+ dprintk(verbose, MANTIS_ERROR, 0, "Mantis Rev %d, ",
+ mantis->revision);
+
+ dprintk(verbose, MANTIS_ERROR, 0,
+ "irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p\n",
+ pdev->irq, mantis->latency,
+ mantis->mantis_addr, mantis->mantis_mmio);
+
+ // No more PCI specific stuff !
+ if (mantis_core_init(mantis) < 0) {
+ dprintk(verbose, MANTIS_ERROR, 1, "Mantis core init failed");
+ ret = -ENODEV;
+ goto err2;
+ }
+
+ return 0;
+
+ // Error conditions ..
+err2:
+ dprintk(verbose, MANTIS_DEBUG, 1, "Err: IO Unmap");
+ if (mantis->mantis_mmio)
+ iounmap(mantis->mantis_mmio);
+err1:
+ dprintk(verbose, MANTIS_DEBUG, 1, "Err: Release regions");
+ release_mem_region(pci_resource_start(pdev, 0),
+ pci_resource_len(pdev, 0));
+ pci_disable_device(pdev);
+err0:
+ dprintk(verbose, MANTIS_DEBUG, 1, "Err: Free");
+ kfree(mantis);
+err:
+ dprintk(verbose, MANTIS_DEBUG, 1, "Err:");
+ return ret;
+}
+
+static void __devexit mantis_pci_remove(struct pci_dev *pdev)
+{
+ struct mantis_pci *mantis = pci_get_drvdata(pdev);
+
+ if (mantis == NULL) {
+ dprintk(verbose, MANTIS_ERROR, 1, "Aeio, Mantis NULL ptr");
+ return;
+ }
+ mantis_core_exit(mantis);
+ dprintk(verbose, MANTIS_ERROR, 1, "Removing -->Mantis irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p",
+ pdev->irq, mantis->latency, mantis->mantis_addr,
+ mantis->mantis_mmio);
+
+ free_irq(pdev->irq, mantis);
+ pci_release_regions(pdev);
+ if (mantis_dma_exit(mantis) < 0)
+ dprintk(verbose, MANTIS_ERROR, 1, "DMA exit failed");
+
+ pci_set_drvdata(pdev, NULL);
+ pci_disable_device(pdev);
+ kfree(mantis);
+}
+
+static struct pci_driver mantis_pci_driver = {
+ .name = DRIVER_NAME,
+ .id_table = mantis_pci_table,
+ .probe = mantis_pci_probe,
+ .remove = mantis_pci_remove,
+};
+
+static int __devinit mantis_pci_init(void)
+{
+ return pci_register_driver(&mantis_pci_driver);
+}
+
+static void __devexit mantis_pci_exit(void)
+{
+ pci_unregister_driver(&mantis_pci_driver);
+}
+
+module_init(mantis_pci_init);
+module_exit(mantis_pci_exit);
+
+MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
+MODULE_AUTHOR("Manu Abraham");
+MODULE_LICENSE("GPL");
