161 lines
4.1 KiB
C
161 lines
4.1 KiB
C
/*
|
|
* AHCI glue platform driver for Marvell EBU SOCs
|
|
*
|
|
* Copyright (C) 2014 Marvell
|
|
*
|
|
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
|
* Marcin Wojtas <mw@semihalf.com>
|
|
*
|
|
* 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 <linux/ahci_platform.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mbus.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#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);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int ahci_mvebu_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
return ahci_platform_suspend_host(&pdev->dev);
|
|
}
|
|
|
|
static int ahci_mvebu_resume(struct platform_device *pdev)
|
|
{
|
|
struct ata_host *host = platform_get_drvdata(pdev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
const struct mbus_dram_target_info *dram;
|
|
|
|
dram = mv_mbus_dram_info();
|
|
if (dram)
|
|
ahci_mvebu_mbus_config(hpriv, dram);
|
|
|
|
ahci_mvebu_regret_option(hpriv);
|
|
|
|
return ahci_platform_resume_host(&pdev->dev);
|
|
}
|
|
#else
|
|
#define ahci_mvebu_suspend NULL
|
|
#define ahci_mvebu_resume NULL
|
|
#endif
|
|
|
|
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,
|
|
.suspend = ahci_mvebu_suspend,
|
|
.resume = ahci_mvebu_resume,
|
|
.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 <thomas.petazzoni@free-electrons.com>, Marcin Wojtas <mw@semihalf.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:ahci_mvebu");
|