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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 <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)
{
u32 stat = 0, mask = 0, lstat = 0, mstat = 0;
u32 rst_stat = 0, rst_mask = 0;
struct mantis_pci *mantis;
struct mantis_ca *ca;
mantis = (struct mantis_pci *) dev_id;
if (unlikely(mantis == NULL)) {
dprintk(verbose, MANTIS_ERROR, 1, "Mantis == NULL");
return IRQ_NONE;
}
ca = mantis->mantis_ca;
stat = mmread(MANTIS_INT_STAT);
mask = mmread(MANTIS_INT_MASK);
mstat = lstat = stat & ~MANTIS_INT_RISCSTAT;
if (!(stat & mask))
return IRQ_NONE;
rst_mask = MANTIS_GPIF_WRACK |
MANTIS_GPIF_OTHERR |
MANTIS_SBUF_WSTO |
MANTIS_GPIF_EXTIRQ;
rst_stat = mmread(MANTIS_GPIF_STATUS);
rst_stat &= rst_mask;
mmwrite(rst_stat, MANTIS_GPIF_STATUS);
mantis->mantis_int_stat = stat;
mantis->mantis_int_mask = mask;
dprintk(verbose, MANTIS_DEBUG, 0, "=== Interrupts[%04x/%04x]= [", stat, mask);
if (stat & MANTIS_INT_RISCEN) {
dprintk(verbose, MANTIS_DEBUG, 0, "* DMA enabl *");
}
if (stat & MANTIS_INT_IRQ0) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-0 *");
mantis->gpif_status = rst_stat;
wake_up(&ca->hif_write_wq);
schedule_work(&ca->hif_evm_work);
}
if (stat & MANTIS_INT_IRQ1) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-1 *");
}
if (stat & MANTIS_INT_OCERR) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT OCERR *");
}
if (stat & MANTIS_INT_PABORT) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT PABRT *");
}
if (stat & MANTIS_INT_RIPERR) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT RIPRR *");
}
if (stat & MANTIS_INT_PPERR) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT PPERR *");
}
if (stat & MANTIS_INT_FTRGT) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT FTRGT *");
}
if (stat & MANTIS_INT_RISCI) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT RISCI *");
mantis->finished_block = (stat & MANTIS_INT_RISCSTAT) >> 28;
tasklet_schedule(&mantis->tasklet);
}
if (stat & MANTIS_INT_I2CDONE) {
dprintk(verbose, MANTIS_DEBUG, 0, "* I2C DONE *");
wake_up(&mantis->i2c_wq);
}
mmwrite(stat, MANTIS_INT_STAT);
stat &= ~(MANTIS_INT_RISCEN | MANTIS_INT_I2CDONE |
MANTIS_INT_I2CRACK | MANTIS_INT_PCMCIA7 |
MANTIS_INT_PCMCIA6 | MANTIS_INT_PCMCIA5 |
MANTIS_INT_PCMCIA4 | MANTIS_INT_PCMCIA3 |
MANTIS_INT_PCMCIA2 | MANTIS_INT_PCMCIA1 |
MANTIS_INT_PCMCIA0 | MANTIS_INT_IRQ1 |
MANTIS_INT_IRQ0 | MANTIS_INT_OCERR |
MANTIS_INT_PABORT | MANTIS_INT_RIPERR |
MANTIS_INT_PPERR | MANTIS_INT_FTRGT |
MANTIS_INT_RISCI);
if (stat)
dprintk(verbose, MANTIS_DEBUG, 0, "* Unknown [%04x] *", stat);
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;
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;
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;
}
mantis->mantis_mmio = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (!mantis->mantis_mmio) {
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,
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;
mantis->subsystem_vendor = pdev->subsystem_vendor;
mantis->subsystem_device = pdev->subsystem_device;
init_waitqueue_head(&mantis->i2c_wq);
mantis_set_direction(mantis, 0); /* CAM bypass */
if (!latency)
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 32);
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");
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