projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| a3464ed2 TP |
1 | /* |
| 2 | * AHCI glue platform driver for Marvell EBU SOCs | |
| 3 | * | |
| 4 | * Copyright (C) 2014 Marvell | |
| 5 | * | |
| 6 | * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | |
| 7 | * Marcin Wojtas <mw@semihalf.com> | |
| 8 | * | |
| 9 | * This file is licensed under the terms of the GNU General Public | |
| 10 | * License version 2. This program is licensed "as is" without any | |
| 11 | * warranty of any kind, whether express or implied. | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/ahci_platform.h> | |
| 15 | #include <linux/kernel.h> | |
| 16 | #include <linux/mbus.h> | |
| 17 | #include <linux/module.h> | |
| 18 | #include <linux/of_device.h> | |
| 19 | #include <linux/platform_device.h> | |
| 20 | #include "ahci.h" | |
| 21 | ||
| 22 | #define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0 | |
| 23 | #define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4 | |
| 24 | ||
| 25 | #define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4)) | |
| 26 | #define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4)) | |
| 27 | #define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4)) | |
| 28 | ||
| 29 | static void ahci_mvebu_mbus_config(struct ahci_host_priv *hpriv, | |
| 30 | const struct mbus_dram_target_info *dram) | |
| 31 | { | |
| 32 | int i; | |
| 33 | ||
| 34 | for (i = 0; i < 4; i++) { | |
| 35 | writel(0, hpriv->mmio + AHCI_WINDOW_CTRL(i)); | |
| 36 | writel(0, hpriv->mmio + AHCI_WINDOW_BASE(i)); | |
| 37 | writel(0, hpriv->mmio + AHCI_WINDOW_SIZE(i)); | |
| 38 | } | |
| 39 | ||
| 40 | for (i = 0; i < dram->num_cs; i++) { | |
| 41 | const struct mbus_dram_window *cs = dram->cs + i; | |
| 42 | ||
| 43 | writel((cs->mbus_attr << 8) | | |
| 44 | (dram->mbus_dram_target_id << 4) | 1, | |
| 45 | hpriv->mmio + AHCI_WINDOW_CTRL(i)); | |
| 46 | writel(cs->base, hpriv->mmio + AHCI_WINDOW_BASE(i)); | |
| 47 | writel(((cs->size - 1) & 0xffff0000), | |
| 48 | hpriv->mmio + AHCI_WINDOW_SIZE(i)); | |
| 49 | } | |
| 50 | } | |
| 51 | ||
| 52 | static void ahci_mvebu_regret_option(struct ahci_host_priv *hpriv) | |
| 53 | { | |
| 54 | /* | |
| 55 | * Enable the regret bit to allow the SATA unit to regret a | |
| 56 | * request that didn't receive an acknowlegde and avoid a | |
| 57 | * deadlock | |
| 58 | */ | |
| 59 | writel(0x4, hpriv->mmio + AHCI_VENDOR_SPECIFIC_0_ADDR); | |
| 60 | writel(0x80, hpriv->mmio + AHCI_VENDOR_SPECIFIC_0_DATA); | |
| 61 | } | |
| 62 | ||
| 63 | static const struct ata_port_info ahci_mvebu_port_info = { | |
| 64 | .flags = AHCI_FLAG_COMMON, | |
| 65 | .pio_mask = ATA_PIO4, | |
| 66 | .udma_mask = ATA_UDMA6, | |
| 67 | .port_ops = &ahci_platform_ops, | |
| 68 | }; | |
| 69 | ||
| 70 | static int ahci_mvebu_probe(struct platform_device *pdev) | |
| 71 | { | |
| 72 | struct ahci_host_priv *hpriv; | |
| 73 | const struct mbus_dram_target_info *dram; | |
| 74 | int rc; | |
| 75 | ||
| 76 | hpriv = ahci_platform_get_resources(pdev); | |
| 77 | if (IS_ERR(hpriv)) | |
| 78 | return PTR_ERR(hpriv); | |
| 79 | ||
| 80 | rc = ahci_platform_enable_resources(hpriv); | |
| 81 | if (rc) | |
| 82 | return rc; | |
| 83 | ||
| 84 | dram = mv_mbus_dram_info(); | |
| 85 | if (!dram) | |
| 86 | return -ENODEV; | |
| 87 | ||
| 88 | ahci_mvebu_mbus_config(hpriv, dram); | |
| 89 | ahci_mvebu_regret_option(hpriv); | |
| 90 | ||
| 725c7b57 | 91 | rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info); |
| a3464ed2 TP |
92 | if (rc) |
| 93 | goto disable_resources; | |
| 94 | ||
| 95 | return 0; | |
| 96 | ||
| 97 | disable_resources: | |
| 98 | ahci_platform_disable_resources(hpriv); | |
| 99 | return rc; | |
| 100 | } | |
| 101 | ||
| 102 | static const struct of_device_id ahci_mvebu_of_match[] = { | |
| 103 | { .compatible = "marvell,armada-380-ahci", }, | |
| 104 | { }, | |
| 105 | }; | |
| 106 | MODULE_DEVICE_TABLE(of, ahci_mvebu_of_match); | |
| 107 | ||
| 108 | /* | |
| 109 | * We currently don't provide power management related operations, | |
| 110 | * since there is no suspend/resume support at the platform level for | |
| 111 | * Armada 38x for the moment. | |
| 112 | */ | |
| 113 | static struct platform_driver ahci_mvebu_driver = { | |
| 114 | .probe = ahci_mvebu_probe, | |
| 115 | .remove = ata_platform_remove_one, | |
| 116 | .driver = { | |
| 117 | .name = "ahci-mvebu", | |
| 118 | .owner = THIS_MODULE, | |
| 119 | .of_match_table = ahci_mvebu_of_match, | |
| 120 | }, | |
| 121 | }; | |
| 122 | module_platform_driver(ahci_mvebu_driver); | |
| 123 | ||
| 124 | MODULE_DESCRIPTION("Marvell EBU AHCI SATA driver"); | |
| 125 | MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>, Marcin Wojtas <mw@semihalf.com>"); | |
| 126 | MODULE_LICENSE("GPL"); | |
| 127 | MODULE_ALIAS("platform:ahci_mvebu"); |