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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Oleksij Rempel <linux@rempel-privat.de>
*
* Driver for Alcor Micro AU6601 and AU6621 controllers
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/alcor_pci.h>
#define DRV_NAME_ALCOR_PCI "alcor_pci"
static DEFINE_IDA(alcor_pci_idr);
static struct mfd_cell alcor_pci_cells[] = {
[ALCOR_SD_CARD] = {
.name = DRV_NAME_ALCOR_PCI_SDMMC,
},
[ALCOR_MS_CARD] = {
.name = DRV_NAME_ALCOR_PCI_MS,
},
};
static const struct alcor_dev_cfg alcor_cfg = {
.dma = 0,
};
static const struct alcor_dev_cfg au6621_cfg = {
.dma = 1,
};
static const struct alcor_dev_cfg au6625_cfg = {
.dma = 0,
};
static const struct pci_device_id pci_ids[] = {
{ PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6601),
.driver_data = (kernel_ulong_t)&alcor_cfg },
{ PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6621),
.driver_data = (kernel_ulong_t)&au6621_cfg },
{ PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6625),
.driver_data = (kernel_ulong_t)&au6625_cfg },
{},
};
MODULE_DEVICE_TABLE(pci, pci_ids);
void alcor_write8(struct alcor_pci_priv *priv, u8 val, unsigned int addr)
{
writeb(val, priv->iobase + addr);
}
EXPORT_SYMBOL_GPL(alcor_write8);
void alcor_write16(struct alcor_pci_priv *priv, u16 val, unsigned int addr)
{
writew(val, priv->iobase + addr);
}
EXPORT_SYMBOL_GPL(alcor_write16);
void alcor_write32(struct alcor_pci_priv *priv, u32 val, unsigned int addr)
{
writel(val, priv->iobase + addr);
}
EXPORT_SYMBOL_GPL(alcor_write32);
void alcor_write32be(struct alcor_pci_priv *priv, u32 val, unsigned int addr)
{
iowrite32be(val, priv->iobase + addr);
}
EXPORT_SYMBOL_GPL(alcor_write32be);
u8 alcor_read8(struct alcor_pci_priv *priv, unsigned int addr)
{
return readb(priv->iobase + addr);
}
EXPORT_SYMBOL_GPL(alcor_read8);
u32 alcor_read32(struct alcor_pci_priv *priv, unsigned int addr)
{
return readl(priv->iobase + addr);
}
EXPORT_SYMBOL_GPL(alcor_read32);
u32 alcor_read32be(struct alcor_pci_priv *priv, unsigned int addr)
{
return ioread32be(priv->iobase + addr);
}
EXPORT_SYMBOL_GPL(alcor_read32be);
static int alcor_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct alcor_dev_cfg *cfg;
struct alcor_pci_priv *priv;
int ret, i, bar = 0;
cfg = (void *)ent->driver_data;
ret = pcim_enable_device(pdev);
if (ret)
return ret;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
ret = ida_alloc(&alcor_pci_idr, GFP_KERNEL);
if (ret < 0)
return ret;
priv->id = ret;
priv->pdev = pdev;
priv->parent_pdev = pdev->bus->self;
priv->dev = &pdev->dev;
priv->cfg = cfg;
priv->irq = pdev->irq;
ret = pci_request_regions(pdev, DRV_NAME_ALCOR_PCI);
if (ret) {
dev_err(&pdev->dev, "Cannot request region\n");
ret = -ENOMEM;
goto error_free_ida;
}
if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
ret = -ENODEV;
goto error_release_regions;
}
priv->iobase = pcim_iomap(pdev, bar, 0);
if (!priv->iobase) {
ret = -ENOMEM;
goto error_release_regions;
}
/* make sure irqs are disabled */
alcor_write32(priv, 0, AU6601_REG_INT_ENABLE);
alcor_write32(priv, 0, AU6601_MS_INT_ENABLE);
ret = dma_set_mask_and_coherent(priv->dev, AU6601_SDMA_MASK);
if (ret) {
dev_err(priv->dev, "Failed to set DMA mask\n");
goto error_release_regions;
}
pci_set_master(pdev);
pci_set_drvdata(pdev, priv);
for (i = 0; i < ARRAY_SIZE(alcor_pci_cells); i++) {
alcor_pci_cells[i].platform_data = priv;
alcor_pci_cells[i].pdata_size = sizeof(*priv);
}
ret = mfd_add_devices(&pdev->dev, priv->id, alcor_pci_cells,
ARRAY_SIZE(alcor_pci_cells), NULL, 0, NULL);
if (ret < 0)
goto error_clear_drvdata;
pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
return 0;
error_clear_drvdata:
pci_clear_master(pdev);
pci_set_drvdata(pdev, NULL);
error_release_regions:
pci_release_regions(pdev);
error_free_ida:
ida_free(&alcor_pci_idr, priv->id);
return ret;
}
static void alcor_pci_remove(struct pci_dev *pdev)
{
struct alcor_pci_priv *priv;
priv = pci_get_drvdata(pdev);
mfd_remove_devices(&pdev->dev);
ida_free(&alcor_pci_idr, priv->id);
pci_release_regions(pdev);
pci_clear_master(pdev);
pci_set_drvdata(pdev, NULL);
}
#ifdef CONFIG_PM_SLEEP
static int alcor_suspend(struct device *dev)
{
return 0;
}
static int alcor_resume(struct device *dev)
{
struct alcor_pci_priv *priv = dev_get_drvdata(dev);
pci_disable_link_state(priv->pdev,
PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(alcor_pci_pm_ops, alcor_suspend, alcor_resume);
static struct pci_driver alcor_driver = {
.name = DRV_NAME_ALCOR_PCI,
.id_table = pci_ids,
.probe = alcor_pci_probe,
.remove = alcor_pci_remove,
.driver = {
.pm = &alcor_pci_pm_ops
},
};
module_pci_driver(alcor_driver);
MODULE_AUTHOR("Oleksij Rempel <linux@rempel-privat.de>");
MODULE_DESCRIPTION("PCI driver for Alcor Micro AU6601 Secure Digital Host Controller Interface");
MODULE_LICENSE("GPL");
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