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/*
* SATA glue for Cavium Octeon III SOCs.
*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2010-2015 Cavium Networks
*
*/
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <asm/octeon/octeon.h>
#include <asm/bitfield.h>
#define CVMX_SATA_UCTL_SHIM_CFG 0xE8
#define SATA_UCTL_ENDIAN_MODE_BIG 1
#define SATA_UCTL_ENDIAN_MODE_LITTLE 0
#define SATA_UCTL_ENDIAN_MODE_MASK 3
#define SATA_UCTL_DMA_ENDIAN_MODE_SHIFT 8
#define SATA_UCTL_CSR_ENDIAN_MODE_SHIFT 0
#define SATA_UCTL_DMA_READ_CMD_SHIFT 12
static int ahci_octeon_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct resource *res;
void __iomem *base;
u64 cfg;
int ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Platform resource[0] is missing\n");
return -ENODEV;
}
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
cfg = cvmx_readq_csr(base + CVMX_SATA_UCTL_SHIM_CFG);
cfg &= ~(SATA_UCTL_ENDIAN_MODE_MASK << SATA_UCTL_DMA_ENDIAN_MODE_SHIFT);
cfg &= ~(SATA_UCTL_ENDIAN_MODE_MASK << SATA_UCTL_CSR_ENDIAN_MODE_SHIFT);
#ifdef __BIG_ENDIAN
cfg |= SATA_UCTL_ENDIAN_MODE_BIG << SATA_UCTL_DMA_ENDIAN_MODE_SHIFT;
cfg |= SATA_UCTL_ENDIAN_MODE_BIG << SATA_UCTL_CSR_ENDIAN_MODE_SHIFT;
#else
cfg |= SATA_UCTL_ENDIAN_MODE_LITTLE << SATA_UCTL_DMA_ENDIAN_MODE_SHIFT;
cfg |= SATA_UCTL_ENDIAN_MODE_LITTLE << SATA_UCTL_CSR_ENDIAN_MODE_SHIFT;
#endif
cfg |= 1 << SATA_UCTL_DMA_READ_CMD_SHIFT;
cvmx_writeq_csr(base + CVMX_SATA_UCTL_SHIM_CFG, cfg);
if (!node) {
dev_err(dev, "no device node, failed to add octeon sata\n");
return -ENODEV;
}
ret = of_platform_populate(node, NULL, NULL, dev);
if (ret) {
dev_err(dev, "failed to add ahci-platform core\n");
return ret;
}
return 0;
}
static int ahci_octeon_remove(struct platform_device *pdev)
{
return 0;
}
static const struct of_device_id octeon_ahci_match[] = {
{ .compatible = "cavium,octeon-7130-sata-uctl", },
{},
};
MODULE_DEVICE_TABLE(of, octeon_ahci_match);
static struct platform_driver ahci_octeon_driver = {
.probe = ahci_octeon_probe,
.remove = ahci_octeon_remove,
.driver = {
.name = "octeon-ahci",
.of_match_table = octeon_ahci_match,
},
};
module_platform_driver(ahci_octeon_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Cavium, Inc. <support@cavium.com>");
MODULE_DESCRIPTION("Cavium Inc. sata config.");
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