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