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1/*2 * SATA glue for Cavium Octeon III SOCs.3 *4 *5 * This file is subject to the terms and conditions of the GNU General Public6 * License. See the file "COPYING" in the main directory of this archive7 * for more details.8 *9 * Copyright (C) 2010-2015 Cavium Networks10 *11 */12 13#include <linux/module.h>14#include <linux/dma-mapping.h>15#include <linux/platform_device.h>16#include <linux/of_platform.h>17 18#include <asm/octeon/octeon.h>19 20#define CVMX_SATA_UCTL_SHIM_CFG 0xE821 22#define SATA_UCTL_ENDIAN_MODE_BIG 123#define SATA_UCTL_ENDIAN_MODE_LITTLE 024#define SATA_UCTL_ENDIAN_MODE_MASK 325 26#define SATA_UCTL_DMA_ENDIAN_MODE_SHIFT 827#define SATA_UCTL_CSR_ENDIAN_MODE_SHIFT 028#define SATA_UCTL_DMA_READ_CMD_SHIFT 1229 30static int ahci_octeon_probe(struct platform_device *pdev)31{32 struct device *dev = &pdev->dev;33 struct device_node *node = dev->of_node;34 void __iomem *base;35 u64 cfg;36 int ret;37 38 base = devm_platform_ioremap_resource(pdev, 0);39 if (IS_ERR(base))40 return PTR_ERR(base);41 42 cfg = cvmx_readq_csr(base + CVMX_SATA_UCTL_SHIM_CFG);43 44 cfg &= ~(SATA_UCTL_ENDIAN_MODE_MASK << SATA_UCTL_DMA_ENDIAN_MODE_SHIFT);45 cfg &= ~(SATA_UCTL_ENDIAN_MODE_MASK << SATA_UCTL_CSR_ENDIAN_MODE_SHIFT);46 47#ifdef __BIG_ENDIAN48 cfg |= SATA_UCTL_ENDIAN_MODE_BIG << SATA_UCTL_DMA_ENDIAN_MODE_SHIFT;49 cfg |= SATA_UCTL_ENDIAN_MODE_BIG << SATA_UCTL_CSR_ENDIAN_MODE_SHIFT;50#else51 cfg |= SATA_UCTL_ENDIAN_MODE_LITTLE << SATA_UCTL_DMA_ENDIAN_MODE_SHIFT;52 cfg |= SATA_UCTL_ENDIAN_MODE_LITTLE << SATA_UCTL_CSR_ENDIAN_MODE_SHIFT;53#endif54 55 cfg |= 1 << SATA_UCTL_DMA_READ_CMD_SHIFT;56 57 cvmx_writeq_csr(base + CVMX_SATA_UCTL_SHIM_CFG, cfg);58 59 if (!node) {60 dev_err(dev, "no device node, failed to add octeon sata\n");61 return -ENODEV;62 }63 64 ret = of_platform_populate(node, NULL, NULL, dev);65 if (ret) {66 dev_err(dev, "failed to add ahci-platform core\n");67 return ret;68 }69 70 return 0;71}72 73static const struct of_device_id octeon_ahci_match[] = {74 { .compatible = "cavium,octeon-7130-sata-uctl", },75 { /* sentinel */ }76};77MODULE_DEVICE_TABLE(of, octeon_ahci_match);78 79static struct platform_driver ahci_octeon_driver = {80 .probe = ahci_octeon_probe,81 .driver = {82 .name = "octeon-ahci",83 .of_match_table = octeon_ahci_match,84 },85};86 87module_platform_driver(ahci_octeon_driver);88 89MODULE_LICENSE("GPL");90MODULE_AUTHOR("Cavium, Inc. <support@cavium.com>");91MODULE_DESCRIPTION("Cavium Inc. sata config.");92