From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/ata/ahci_mvebu.c | 133 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 kernel/drivers/ata/ahci_mvebu.c (limited to 'kernel/drivers/ata/ahci_mvebu.c') diff --git a/kernel/drivers/ata/ahci_mvebu.c b/kernel/drivers/ata/ahci_mvebu.c new file mode 100644 index 000000000..5928d0746 --- /dev/null +++ b/kernel/drivers/ata/ahci_mvebu.c @@ -0,0 +1,133 @@ +/* + * AHCI glue platform driver for Marvell EBU SOCs + * + * Copyright (C) 2014 Marvell + * + * Thomas Petazzoni + * Marcin Wojtas + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include +#include +#include "ahci.h" + +#define DRV_NAME "ahci-mvebu" + +#define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0 +#define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4 + +#define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4)) +#define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4)) +#define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4)) + +static void ahci_mvebu_mbus_config(struct ahci_host_priv *hpriv, + const struct mbus_dram_target_info *dram) +{ + int i; + + for (i = 0; i < 4; i++) { + writel(0, hpriv->mmio + AHCI_WINDOW_CTRL(i)); + writel(0, hpriv->mmio + AHCI_WINDOW_BASE(i)); + writel(0, hpriv->mmio + AHCI_WINDOW_SIZE(i)); + } + + for (i = 0; i < dram->num_cs; i++) { + const struct mbus_dram_window *cs = dram->cs + i; + + writel((cs->mbus_attr << 8) | + (dram->mbus_dram_target_id << 4) | 1, + hpriv->mmio + AHCI_WINDOW_CTRL(i)); + writel(cs->base >> 16, hpriv->mmio + AHCI_WINDOW_BASE(i)); + writel(((cs->size - 1) & 0xffff0000), + hpriv->mmio + AHCI_WINDOW_SIZE(i)); + } +} + +static void ahci_mvebu_regret_option(struct ahci_host_priv *hpriv) +{ + /* + * Enable the regret bit to allow the SATA unit to regret a + * request that didn't receive an acknowlegde and avoid a + * deadlock + */ + writel(0x4, hpriv->mmio + AHCI_VENDOR_SPECIFIC_0_ADDR); + writel(0x80, hpriv->mmio + AHCI_VENDOR_SPECIFIC_0_DATA); +} + +static const struct ata_port_info ahci_mvebu_port_info = { + .flags = AHCI_FLAG_COMMON, + .pio_mask = ATA_PIO4, + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_platform_ops, +}; + +static struct scsi_host_template ahci_platform_sht = { + AHCI_SHT(DRV_NAME), +}; + +static int ahci_mvebu_probe(struct platform_device *pdev) +{ + struct ahci_host_priv *hpriv; + const struct mbus_dram_target_info *dram; + int rc; + + hpriv = ahci_platform_get_resources(pdev); + if (IS_ERR(hpriv)) + return PTR_ERR(hpriv); + + rc = ahci_platform_enable_resources(hpriv); + if (rc) + return rc; + + dram = mv_mbus_dram_info(); + if (!dram) + return -ENODEV; + + ahci_mvebu_mbus_config(hpriv, dram); + ahci_mvebu_regret_option(hpriv); + + rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info, + &ahci_platform_sht); + if (rc) + goto disable_resources; + + return 0; + +disable_resources: + ahci_platform_disable_resources(hpriv); + return rc; +} + +static const struct of_device_id ahci_mvebu_of_match[] = { + { .compatible = "marvell,armada-380-ahci", }, + { }, +}; +MODULE_DEVICE_TABLE(of, ahci_mvebu_of_match); + +/* + * We currently don't provide power management related operations, + * since there is no suspend/resume support at the platform level for + * Armada 38x for the moment. + */ +static struct platform_driver ahci_mvebu_driver = { + .probe = ahci_mvebu_probe, + .remove = ata_platform_remove_one, + .driver = { + .name = DRV_NAME, + .of_match_table = ahci_mvebu_of_match, + }, +}; +module_platform_driver(ahci_mvebu_driver); + +MODULE_DESCRIPTION("Marvell EBU AHCI SATA driver"); +MODULE_AUTHOR("Thomas Petazzoni , Marcin Wojtas "); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ahci_mvebu"); -- cgit 1.2.3-korg