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// SPDX-License-Identifier: GPL-2.0
// Copyright 2020 NXP
#include <linux/imx_mic_epf.h>
#include "imx_mic_boot.h"
#include "../common/imx_mic_common.h"
static const char imx_mic_driver_name[] = "imx_mic";
static struct imx_mic_driver *g_mdrv;
/*
* Just enable irq here since irq is requested in imx_mic_driver_init function.
*/
static struct mic_irq *_imx_mic_request_irq(struct vop_device *vpdev,
irqreturn_t (*func)(int irq, void *data),
const char *name, void *data, int intr_src)
{
struct imx_mic_driver *mdrv = g_mdrv;
struct imx_mic_intr *mintr = mdrv->mintr;
unsigned long cookie = intr_src;
int ret;
if (cookie == MIC_CONFIG_DB) {
mintr->config_intr = func;
mintr->config_intr_priv = data;
} else if (cookie == MIC_DATA_DB) {
mintr->data_intr = func;
mintr->data_intr_priv = data;
} else {
dev_err(mdrv->dev, "invalid doorbell index\n");
ret = -EINVAL;
goto err;
}
imx_mic_intr_enable(mdrv, cookie);
return (struct mic_irq *)cookie;
err:
return ERR_PTR(ret);
}
/*
* Just disable irq here since irq is freed in imx_mic_driver_uninit function.
*/
static void _imx_mic_free_irq(struct vop_device *vpdev,
struct mic_irq *cookie, void *data)
{
struct imx_mic_driver *mdrv = g_mdrv;
int index = (unsigned long)cookie;
imx_mic_intr_disable(mdrv, index);
}
static void _imx_mic_ack_interrupt(struct vop_device *vpdev, int num)
{
struct imx_mic_driver *mdrv = g_mdrv;
imx_mic_intr_ack(mdrv, num);
}
static int _imx_mic_next_db(struct vop_device *vpdev)
{
struct imx_mic_driver *mdrv = g_mdrv;
static unsigned int i;
unsigned int db_index = MIC_CONFIG_DB;
if (i == 0)
db_index = MIC_CONFIG_DB;
if (i == 1)
db_index = MIC_DATA_DB;
i++;
if (i > 2)
dev_err(mdrv->dev, "doorbell cannot be trusted\n");
return db_index;
}
static void __iomem *_imx_mic_get_remote_dp(struct vop_device *vpdev)
{
struct imx_mic_driver *mdrv = g_mdrv;
struct imx_mic_device *mdev = &mdrv->mdev;
return mdev->mmio.va;
}
static void _imx_mic_send_intr(struct vop_device *vpdev, int db)
{
struct imx_mic_driver *mdrv = g_mdrv;
struct imx_mic_epf *mepf = mdrv->mepf;
struct pci_epf *epf = mepf->epf;
struct pci_epc *epc = epf->epc;
pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, MIC_PCI_MSI_INDEX);
}
static void __iomem *_imx_mic_ioremap(struct vop_device *vpdev,
dma_addr_t pa, size_t len)
{
struct imx_mic_driver *mdrv = g_mdrv;
struct imx_mic_device *mdev = &mdrv->mdev;
/* Note: pa should be RC's absolute physical address */
return (mdev->mmio.va + (pa - mdev->mmio.pa));
}
static void _imx_mic_iounmap(struct vop_device *vpdev, void __iomem *va)
{
/* nothing to do */
}
static struct vop_hw_ops imx_mic_hw_ops = {
.request_irq = _imx_mic_request_irq,
.free_irq = _imx_mic_free_irq,
.ack_interrupt = _imx_mic_ack_interrupt,
.next_db = _imx_mic_next_db,
.get_remote_dp = _imx_mic_get_remote_dp,
.send_intr = _imx_mic_send_intr,
.remap = _imx_mic_ioremap,
.unmap = _imx_mic_iounmap,
};
static int __init imx_mic_driver_init(struct imx_mic_driver *mdrv)
{
int ret;
ret = imx_mic_intr_init(mdrv);
if (ret) {
dev_err(mdrv->dev, "imx_mic_intr_init failed\n");
return ret;
}
mdrv->vpdev = vop_register_device(mdrv->dev, VOP_DEV_TRNSP,
NULL, &imx_mic_hw_ops, 0,
NULL, NULL);
if (IS_ERR(mdrv->vpdev)) {
ret = PTR_ERR(mdrv->vpdev);
return ret;
}
return 0;
}
static void imx_mic_driver_uninit(struct imx_mic_driver *mdrv)
{
vop_unregister_device(mdrv->vpdev);
imx_mic_intr_uninit(mdrv);
}
int imx_mic_probe(struct imx_mic_epf *mic_epf)
{
struct imx_mic_driver *mdrv;
struct imx_mic_device *mdev;
int ret;
mdrv = devm_kzalloc(mic_epf->dev, sizeof(*mdrv), GFP_KERNEL);
if (!mdrv)
return -ENOMEM;
g_mdrv = mdrv;
mdev = &mdrv->mdev;
mdrv->mepf = mic_epf;
mdrv->dev = mic_epf->dev;
snprintf(mdrv->name, sizeof(imx_mic_driver_name), imx_mic_driver_name);
/* fetch reserved memory from rc side */
mdev->mmio.pa = mic_epf->aper.rc_shmem_pa;
mdev->mmio.va = mic_epf->aper.pci_va;
mdev->mmio.len = mic_epf->aper.pci_len;
ret = imx_mic_driver_init(mdrv);
if (ret) {
dev_err(mic_epf->dev, "imx_mic_driver_init failed\n");
return ret;
}
mdrv->vpdev->dev.dma_pfn_offset = (SWIOTLB_REGION_ADDR - mic_epf->aper.rc_map_addr) >> PAGE_SHIFT;
return 0;
}
EXPORT_SYMBOL_GPL(imx_mic_probe);
void imx_mic_remove(void)
{
struct imx_mic_driver *mdrv = g_mdrv;
imx_mic_driver_uninit(mdrv);
}
EXPORT_SYMBOL_GPL(imx_mic_remove);
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