mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
f9f3691790
Add a dynamic host_flags argument to make ahci_platform_init_host more flexible, then remove the AHCI_HFLAGS(...) argument from some driver's ata_port_info, and pass that in as the new argument. Cc: Hans de Geode <hdegoede@redhat.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Kefeng Wang <kefeng.wang@linaro.org> Signed-off-by: Tejun Heo <tj@kernel.org>
116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
/*
|
|
* DaVinci DA850 AHCI SATA platform driver
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/libata.h>
|
|
#include <linux/ahci_platform.h>
|
|
#include "ahci.h"
|
|
|
|
/* SATA PHY Control Register offset from AHCI base */
|
|
#define SATA_P0PHYCR_REG 0x178
|
|
|
|
#define SATA_PHY_MPY(x) ((x) << 0)
|
|
#define SATA_PHY_LOS(x) ((x) << 6)
|
|
#define SATA_PHY_RXCDR(x) ((x) << 10)
|
|
#define SATA_PHY_RXEQ(x) ((x) << 13)
|
|
#define SATA_PHY_TXSWING(x) ((x) << 19)
|
|
#define SATA_PHY_ENPLL(x) ((x) << 31)
|
|
|
|
/*
|
|
* The multiplier needed for 1.5GHz PLL output.
|
|
*
|
|
* NOTE: This is currently hardcoded to be suitable for 100MHz crystal
|
|
* frequency (which is used by DA850 EVM board) and may need to be changed
|
|
* if you would like to use this driver on some other board.
|
|
*/
|
|
#define DA850_SATA_CLK_MULTIPLIER 7
|
|
|
|
static void da850_sata_init(struct device *dev, void __iomem *pwrdn_reg,
|
|
void __iomem *ahci_base)
|
|
{
|
|
unsigned int val;
|
|
|
|
/* Enable SATA clock receiver */
|
|
val = readl(pwrdn_reg);
|
|
val &= ~BIT(0);
|
|
writel(val, pwrdn_reg);
|
|
|
|
val = SATA_PHY_MPY(DA850_SATA_CLK_MULTIPLIER + 1) | SATA_PHY_LOS(1) |
|
|
SATA_PHY_RXCDR(4) | SATA_PHY_RXEQ(1) | SATA_PHY_TXSWING(3) |
|
|
SATA_PHY_ENPLL(1);
|
|
|
|
writel(val, ahci_base + SATA_P0PHYCR_REG);
|
|
}
|
|
|
|
static const struct ata_port_info ahci_da850_port_info = {
|
|
.flags = AHCI_FLAG_COMMON,
|
|
.pio_mask = ATA_PIO4,
|
|
.udma_mask = ATA_UDMA6,
|
|
.port_ops = &ahci_platform_ops,
|
|
};
|
|
|
|
static int ahci_da850_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ahci_host_priv *hpriv;
|
|
struct resource *res;
|
|
void __iomem *pwrdn_reg;
|
|
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;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (!res)
|
|
goto disable_resources;
|
|
|
|
pwrdn_reg = devm_ioremap(dev, res->start, resource_size(res));
|
|
if (!pwrdn_reg)
|
|
goto disable_resources;
|
|
|
|
da850_sata_init(dev, pwrdn_reg, hpriv->mmio);
|
|
|
|
rc = ahci_platform_init_host(pdev, hpriv, &ahci_da850_port_info,
|
|
0, 0, 0);
|
|
if (rc)
|
|
goto disable_resources;
|
|
|
|
return 0;
|
|
disable_resources:
|
|
ahci_platform_disable_resources(hpriv);
|
|
return rc;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(ahci_da850_pm_ops, ahci_platform_suspend,
|
|
ahci_platform_resume);
|
|
|
|
static struct platform_driver ahci_da850_driver = {
|
|
.probe = ahci_da850_probe,
|
|
.remove = ata_platform_remove_one,
|
|
.driver = {
|
|
.name = "ahci_da850",
|
|
.owner = THIS_MODULE,
|
|
.pm = &ahci_da850_pm_ops,
|
|
},
|
|
};
|
|
module_platform_driver(ahci_da850_driver);
|
|
|
|
MODULE_DESCRIPTION("DaVinci DA850 AHCI SATA platform driver");
|
|
MODULE_AUTHOR("Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|