static int __devinit ocore_irq_mng_probe(struct platform_device *pdev)
{
unsigned int irq;
u16 data;
int ret = 0;
struct fpga_irq_mng_platform_data *pdata;
pr_debug("Initializing FPGA IRQs\n");
/* check if ID is correct */
data = ioread16(ARMADEUS_FPGA_BASE_ADDR_VIRT + IRQ_MNGR_BASE + ID_OFFSET);
if (data != ID) {
printk(KERN_WARNING "For irq_mngr id:%d doesn't match with id"
"read %d,\n is device present ?\n", ID, data);
// return -ENODEV;
}
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev,"No platform_data available\n");
return -ENOMEM;
}
/* Mask all interrupts initially */
writew(0, FPGA_IMR);
if (pdata->init) {
ret = pdata->init(pdev);
if (ret)
goto failed_platform_init;
}
for (irq = IRQ_FPGA(0); irq < IRQ_FPGA(NB_IT); irq++) {
pr_debug("IRQ %d\n", irq);
set_irq_chip_and_handler(irq, &imx_fpga_chip, handle_edge_irq);
set_irq_flags(irq, IRQF_VALID);
/* clear pending interrrupts */
imx_fpga_ack_irq(irq);
}
set_irq_chained_handler(ARMADEUS_FPGA_IRQ, imx_fpga_demux_handler);
pr_debug("FPGA IRQs initialized (Parent=%d)\n", ARMADEUS_FPGA_IRQ);
return 0;
failed_platform_init:
return ret;
}
static int __devexit ocore_irq_mng_remove(struct platform_device *pdev)
{
unsigned int irq;
struct fpga_irq_mng_platform_data *pdata = pdev->dev.platform_data;
for (irq = IRQ_FPGA(0); irq < IRQ_FPGA(NB_IT); irq++) {
set_irq_chip(irq, NULL);
set_irq_handler(irq,NULL);
set_irq_flags(irq, 0);
}
set_irq_chained_handler(ARMADEUS_FPGA_IRQ, NULL);
if (pdata && pdata->exit) {
pdata->exit(pdev);
}
pr_debug("%s\n", __FUNCTION__);
return 0;
}
*
*/
#include <linux/version.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <asm/irq.h>
#ifndef CONFIG_MACH_APF9328
#include <mach/fpga.h> /* To remove when MX1 platform is merged*/
#endif
/* Module's parameters: */
static int interrupt = IRQ_FPGA(3);
module_param(interrupt, int, 0000);
MODULE_PARM_DESC(interrupt, "IT to request");
#define DRIVER_NAME "IRQ test module"
static irqreturn_t fpga_interrupt(int irq,void *dev_id,struct pt_regs *reg)
{
printk(KERN_ERR "FPGA IT n°%d\n", irq);
return IRQ_HANDLED;
}
unsigned int data;
static void imx_fpga_ack_irq(struct irq_data *data)
{
struct irq_mng *mng = irq_data_get_irq_chip_data(data);
unsigned int irq = data->irq;
#else
static void imx_fpga_ack_irq(unsigned int irq)
{
struct irq_mng *mng = &global_mng;
#endif
int shadow;
shadow = 1 << ((irq - IRQ_FPGA_START) % NB_IT);
pr_debug("%s: irq %d ack:0x%x\n", __FUNCTION__, irq, shadow);
writew(shadow, mng->membase + FPGA_ISR);
}
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36)
static void imx_fpga_mask_irq(struct irq_data *data)
{
struct irq_mng *mng = irq_data_get_irq_chip_data(data);
unsigned int irq = data->irq;
#else
static void imx_fpga_mask_irq(unsigned int irq)
{
struct irq_mng *mng = &global_mng;
#endif
int shadow;
shadow = readw(mng->membase + FPGA_IMR);
shadow &= ~( 1 << ((irq - IRQ_FPGA_START) % NB_IT));
pr_debug("%s: irq %d mask:0x%x\n", __FUNCTION__, irq, shadow);
writew(shadow, mng->membase + FPGA_IMR);
}
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36)
static void imx_fpga_unmask_irq(struct irq_data *data)
{
struct irq_mng *mng = irq_data_get_irq_chip_data(data);
unsigned int irq = data->irq;
#else
static void imx_fpga_unmask_irq(unsigned int irq)
{
struct irq_mng *mng = &global_mng;
#endif
int shadow;
shadow = readw(mng->membase + FPGA_IMR);
shadow |= 1 << ((irq - IRQ_FPGA_START) % NB_IT);
pr_debug("%s: irq %d mask:0x%x\n", __FUNCTION__, irq, shadow);
writew(shadow, mng->membase + FPGA_IMR);
}
static irqreturn_t ocore_irq_mng_interrupt(int irq, void *data)
{
struct irq_mng *mng = data;
struct irq_desc *desc;
unsigned int mask;
mask = readw(mng->membase + FPGA_ISR);
pr_debug("%s: mask:0x%04x\n", __FUNCTION__, mask);
do {
irq = IRQ_FPGA_START;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,29)
desc = irq_to_desc(irq);
#else
desc = irq_desc + irq;
#endif
/* handle irqs */
while (mask) {
if (mask & 1) {
pr_debug("handling irq %d 0x%08x\n", irq,
(unsigned int)desc);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,39)
desc->handle_irq(irq, desc);
#else
desc_handle_irq(irq, desc);
#endif
}
irq++;
desc++;
mask >>= 1;
}
mask = readw(mng->membase + FPGA_ISR);
} while (mask != 0);
return IRQ_HANDLED;
}
static struct irq_chip imx_fpga_chip = {
.name = "FPGA",
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36)
.irq_ack = imx_fpga_ack_irq,
.irq_mask = imx_fpga_mask_irq,
.irq_unmask = imx_fpga_unmask_irq,
#else
.ack = imx_fpga_ack_irq,
.mask = imx_fpga_mask_irq,
.unmask = imx_fpga_unmask_irq,
#endif
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,39)
.irq_set_type = imx_fpga_irq_type,
#else
.set_type = imx_fpga_irq_type,
#endif
};
#ifdef CONFIG_PM
static int ocore_irq_mng_suspend(struct platform_device *pdev, pm_message_t state)
{
dev_dbg(&pdev->dev, "suspended\n");
return 0;
}
static int ocore_irq_mng_resume(struct platform_device *pdev)
{
dev_dbg(&pdev->dev, "resumed\n");
return 0;
}
#else
# define ocore_irq_mng_suspend NULL
# define ocore_irq_mng_resume NULL
#endif /* CONFIG_PM */
#if LINUX_VERSION_CODE > KERNEL_VERSION(3,8,0)
/* __dev* stuff is removed from Linux since 30/11/2012 */
#define __devinit
#define __devexit
#endif
static int __devinit ocore_irq_mng_probe(struct platform_device *pdev)
{
struct ocore_irq_mng_pdata *pdata = pdev->dev.platform_data;
unsigned int irq;
u16 id;
int ret = 0;
struct resource *mem_res;
struct resource *irq_res;
struct irq_mng *mng;
if (!pdata) {
dev_err(&pdev->dev, "Platform data required !\n");
return -ENODEV;
}
/* get resources */
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem_res) {
dev_err(&pdev->dev, "can't find mem resource\n");
return -EINVAL;
}
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq_res) {
dev_err(&pdev->dev, "can't find irq resource\n");
return -EINVAL;
}
mem_res = request_mem_region(mem_res->start, resource_size(mem_res), pdev->name);
if (!mem_res) {
dev_err(&pdev->dev, "iomem already in use\n");
return -EBUSY;
}
/* allocate memory for private structure */
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36)
mng = kmalloc(sizeof(struct irq_mng), GFP_KERNEL);
#else
mng = &global_mng;
#endif
if (!mng) {
ret = -ENOMEM;
goto out_release_mem;
}
pdata->mng = mng;
mng->membase = ioremap(mem_res->start, resource_size(mem_res));
if (!mng->membase) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENOMEM;
goto out_dev_free;
}
mng->mem_res = mem_res;
mng->irq_res = irq_res;
/* check if ID is correct */
id = readw(mng->membase + ID_OFFSET);
if (id != pdata->idnum) {
printk(KERN_WARNING "For irq_mngr id:%d doesn't match with id"
"read %d,\n is device present ?\n", pdata->idnum, id);
ret = -ENODEV;
goto out_iounmap;
}
/* Mask all interrupts initially */
writew(0, mng->membase + FPGA_IMR);
for (irq = IRQ_FPGA(0); irq < IRQ_FPGA(NB_IT); irq++) {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,39)
irq_set_chip_data(irq, mng);
irq_set_chip_and_handler_name(irq, &imx_fpga_chip,
handle_edge_irq, NULL);
#else
set_irq_chip_data(irq, mng);
set_irq_chip_and_handler(irq, &imx_fpga_chip, handle_edge_irq);
#endif
set_irq_flags(irq, IRQF_VALID);
}
/* clear pending interrupts */
writew(0xffff, mng->membase + FPGA_ISR);
ret = request_irq(mng->irq_res->start, ocore_irq_mng_interrupt,
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
IRQF_SAMPLE_RANDOM,
#else
0,
#endif
"ocore_irq_mng", mng);
if (ret < 0) {
printk(KERN_ERR "Can't register irq %d\n",
mng->irq_res->start);
goto request_irq_error;
}
pr_debug("FPGA IRQs initialized (Parent=%d)\n", mng->irq_res->start);
return 0;
request_irq_error:
out_iounmap:
iounmap(mng->membase);
out_dev_free:
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,36)
kfree(mng);
#endif
out_release_mem:
release_mem_region(mem_res->start, resource_size(mem_res));
return ret;
}
static int __devexit ocore_irq_mng_remove(struct platform_device *pdev)
{
struct ocore_irq_mng_pdata *pdata = pdev->dev.platform_data;
struct irq_mng *mng = pdata->mng;
unsigned int irq;
for (irq = IRQ_FPGA(0); irq < IRQ_FPGA(NB_IT); irq++) {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,39)
irq_set_chip(irq, NULL);
irq_set_handler(irq, NULL);
#else
set_irq_chip(irq, NULL);
set_irq_handler(irq, NULL);
#endif
set_irq_flags(irq, 0);
}
free_irq(mng->irq_res->start, mng);
release_mem_region(mng->mem_res->start, resource_size(mng->mem_res));
iounmap(mng->membase);
kfree(mng);
return 0;
}
static struct platform_driver ocore_irq_mng_driver = {
.probe = ocore_irq_mng_probe,
.remove = ocore_irq_mng_remove,
.suspend = ocore_irq_mng_suspend,
.resume = ocore_irq_mng_resume,
.driver = {
.name = DRIVER_NAME,
},
};
static int __init ocore_irq_mng_init(void)
{
return platform_driver_register(&ocore_irq_mng_driver);
}
static void __exit ocore_irq_mng_exit(void)
{
platform_driver_unregister(&ocore_irq_mng_driver);
}
module_init(ocore_irq_mng_init);
module_exit(ocore_irq_mng_exit);
MODULE_AUTHOR("Julien Boibessot, <*****@*****.**>");
MODULE_DESCRIPTION("Armadeus OpenCore IRQ manager");
MODULE_LICENSE("GPL");
