Thomas Petazzoni | a3464ed | 2014-04-15 17:00:03 +0200 | [diff] [blame] | 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 | |
Akinobu Mita | 018d5ef | 2015-01-29 08:30:29 +0900 | [diff] [blame] | 22 | #define DRV_NAME "ahci-mvebu" |
| 23 | |
Thomas Petazzoni | a3464ed | 2014-04-15 17:00:03 +0200 | [diff] [blame] | 24 | #define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0 |
| 25 | #define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4 |
| 26 | |
| 27 | #define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4)) |
| 28 | #define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4)) |
| 29 | #define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4)) |
| 30 | |
| 31 | static void ahci_mvebu_mbus_config(struct ahci_host_priv *hpriv, |
| 32 | const struct mbus_dram_target_info *dram) |
| 33 | { |
| 34 | int i; |
| 35 | |
| 36 | for (i = 0; i < 4; i++) { |
| 37 | writel(0, hpriv->mmio + AHCI_WINDOW_CTRL(i)); |
| 38 | writel(0, hpriv->mmio + AHCI_WINDOW_BASE(i)); |
| 39 | writel(0, hpriv->mmio + AHCI_WINDOW_SIZE(i)); |
| 40 | } |
| 41 | |
| 42 | for (i = 0; i < dram->num_cs; i++) { |
| 43 | const struct mbus_dram_window *cs = dram->cs + i; |
| 44 | |
| 45 | writel((cs->mbus_attr << 8) | |
| 46 | (dram->mbus_dram_target_id << 4) | 1, |
| 47 | hpriv->mmio + AHCI_WINDOW_CTRL(i)); |
| 48 | writel(cs->base, hpriv->mmio + AHCI_WINDOW_BASE(i)); |
| 49 | writel(((cs->size - 1) & 0xffff0000), |
| 50 | hpriv->mmio + AHCI_WINDOW_SIZE(i)); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | static void ahci_mvebu_regret_option(struct ahci_host_priv *hpriv) |
| 55 | { |
| 56 | /* |
| 57 | * Enable the regret bit to allow the SATA unit to regret a |
| 58 | * request that didn't receive an acknowlegde and avoid a |
| 59 | * deadlock |
| 60 | */ |
| 61 | writel(0x4, hpriv->mmio + AHCI_VENDOR_SPECIFIC_0_ADDR); |
| 62 | writel(0x80, hpriv->mmio + AHCI_VENDOR_SPECIFIC_0_DATA); |
| 63 | } |
| 64 | |
| 65 | static const struct ata_port_info ahci_mvebu_port_info = { |
| 66 | .flags = AHCI_FLAG_COMMON, |
| 67 | .pio_mask = ATA_PIO4, |
| 68 | .udma_mask = ATA_UDMA6, |
| 69 | .port_ops = &ahci_platform_ops, |
| 70 | }; |
| 71 | |
Akinobu Mita | 018d5ef | 2015-01-29 08:30:29 +0900 | [diff] [blame] | 72 | static struct scsi_host_template ahci_platform_sht = { |
| 73 | AHCI_SHT(DRV_NAME), |
| 74 | }; |
| 75 | |
Thomas Petazzoni | a3464ed | 2014-04-15 17:00:03 +0200 | [diff] [blame] | 76 | static int ahci_mvebu_probe(struct platform_device *pdev) |
| 77 | { |
| 78 | struct ahci_host_priv *hpriv; |
| 79 | const struct mbus_dram_target_info *dram; |
| 80 | int rc; |
| 81 | |
| 82 | hpriv = ahci_platform_get_resources(pdev); |
| 83 | if (IS_ERR(hpriv)) |
| 84 | return PTR_ERR(hpriv); |
| 85 | |
| 86 | rc = ahci_platform_enable_resources(hpriv); |
| 87 | if (rc) |
| 88 | return rc; |
| 89 | |
| 90 | dram = mv_mbus_dram_info(); |
| 91 | if (!dram) |
| 92 | return -ENODEV; |
| 93 | |
| 94 | ahci_mvebu_mbus_config(hpriv, dram); |
| 95 | ahci_mvebu_regret_option(hpriv); |
| 96 | |
Akinobu Mita | 018d5ef | 2015-01-29 08:30:29 +0900 | [diff] [blame] | 97 | rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info, |
| 98 | &ahci_platform_sht); |
Thomas Petazzoni | a3464ed | 2014-04-15 17:00:03 +0200 | [diff] [blame] | 99 | if (rc) |
| 100 | goto disable_resources; |
| 101 | |
| 102 | return 0; |
| 103 | |
| 104 | disable_resources: |
| 105 | ahci_platform_disable_resources(hpriv); |
| 106 | return rc; |
| 107 | } |
| 108 | |
| 109 | static const struct of_device_id ahci_mvebu_of_match[] = { |
| 110 | { .compatible = "marvell,armada-380-ahci", }, |
| 111 | { }, |
| 112 | }; |
| 113 | MODULE_DEVICE_TABLE(of, ahci_mvebu_of_match); |
| 114 | |
| 115 | /* |
| 116 | * We currently don't provide power management related operations, |
| 117 | * since there is no suspend/resume support at the platform level for |
| 118 | * Armada 38x for the moment. |
| 119 | */ |
| 120 | static struct platform_driver ahci_mvebu_driver = { |
| 121 | .probe = ahci_mvebu_probe, |
| 122 | .remove = ata_platform_remove_one, |
| 123 | .driver = { |
Akinobu Mita | 018d5ef | 2015-01-29 08:30:29 +0900 | [diff] [blame] | 124 | .name = DRV_NAME, |
Thomas Petazzoni | a3464ed | 2014-04-15 17:00:03 +0200 | [diff] [blame] | 125 | .of_match_table = ahci_mvebu_of_match, |
| 126 | }, |
| 127 | }; |
| 128 | module_platform_driver(ahci_mvebu_driver); |
| 129 | |
| 130 | MODULE_DESCRIPTION("Marvell EBU AHCI SATA driver"); |
| 131 | MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>, Marcin Wojtas <mw@semihalf.com>"); |
| 132 | MODULE_LICENSE("GPL"); |
| 133 | MODULE_ALIAS("platform:ahci_mvebu"); |