/* * 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); 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.");