1 /* 2 * AHCI SATA platform driver 3 * 4 * Copyright 2004-2005 Red Hat, Inc. 5 * Jeff Garzik <jgarzik@pobox.com> 6 * Copyright 2010 MontaVista Software, LLC. 7 * Anton Vorontsov <avorontsov@ru.mvista.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/pm.h> 18 #include <linux/device.h> 19 #include <linux/platform_device.h> 20 #include <linux/libata.h> 21 #include <linux/ahci_platform.h> 22 #include "ahci.h" 23 24 static const struct ata_port_info ahci_port_info = { 25 .flags = AHCI_FLAG_COMMON, 26 .pio_mask = ATA_PIO4, 27 .udma_mask = ATA_UDMA6, 28 .port_ops = &ahci_platform_ops, 29 }; 30 31 static int ahci_probe(struct platform_device *pdev) 32 { 33 struct device *dev = &pdev->dev; 34 struct ahci_platform_data *pdata = dev_get_platdata(dev); 35 struct ahci_host_priv *hpriv; 36 int rc; 37 38 hpriv = ahci_platform_get_resources(pdev); 39 if (IS_ERR(hpriv)) 40 return PTR_ERR(hpriv); 41 42 rc = ahci_platform_enable_resources(hpriv); 43 if (rc) 44 return rc; 45 46 /* 47 * Some platforms might need to prepare for mmio region access, 48 * which could be done in the following init call. So, the mmio 49 * region shouldn't be accessed before init (if provided) has 50 * returned successfully. 51 */ 52 if (pdata && pdata->init) { 53 rc = pdata->init(dev, hpriv->mmio); 54 if (rc) 55 goto disable_resources; 56 } 57 58 rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info, 0, 0); 59 if (rc) 60 goto pdata_exit; 61 62 return 0; 63 pdata_exit: 64 if (pdata && pdata->exit) 65 pdata->exit(dev); 66 disable_resources: 67 ahci_platform_disable_resources(hpriv); 68 return rc; 69 } 70 71 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend, 72 ahci_platform_resume); 73 74 static const struct of_device_id ahci_of_match[] = { 75 { .compatible = "snps,spear-ahci", }, 76 { .compatible = "snps,exynos5440-ahci", }, 77 { .compatible = "ibm,476gtr-ahci", }, 78 { .compatible = "snps,dwc-ahci", }, 79 {}, 80 }; 81 MODULE_DEVICE_TABLE(of, ahci_of_match); 82 83 static struct platform_driver ahci_driver = { 84 .probe = ahci_probe, 85 .remove = ata_platform_remove_one, 86 .driver = { 87 .name = "ahci", 88 .owner = THIS_MODULE, 89 .of_match_table = ahci_of_match, 90 .pm = &ahci_pm_ops, 91 }, 92 }; 93 module_platform_driver(ahci_driver); 94 95 MODULE_DESCRIPTION("AHCI SATA platform driver"); 96 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); 97 MODULE_LICENSE("GPL"); 98 MODULE_ALIAS("platform:ahci"); 99