mirror of https://gitee.com/openkylin/linux.git
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
|
/*
|
||
|
|
* 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.");
|