264 lines
6.4 KiB
C
264 lines
6.4 KiB
C
/*
|
|
* Allwinner sunxi AHCI SATA platform driver
|
|
* Copyright 2013 Olliver Schinagl <oliver@schinagl.nl>
|
|
* Copyright 2014 Hans de Goede <hdegoede@redhat.com>
|
|
*
|
|
* based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
|
|
* Based on code from Allwinner Technology Co., Ltd. <www.allwinnertech.com>,
|
|
* Daniel Wang <danielwang@allwinnertech.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#include <linux/ahci_platform.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include "ahci.h"
|
|
|
|
/* Insmod parameters */
|
|
static bool enable_pmp;
|
|
module_param(enable_pmp, bool, 0);
|
|
MODULE_PARM_DESC(enable_pmp,
|
|
"Enable support for sata port multipliers, only use if you use a pmp!");
|
|
|
|
#define AHCI_BISTAFR 0x00a0
|
|
#define AHCI_BISTCR 0x00a4
|
|
#define AHCI_BISTFCTR 0x00a8
|
|
#define AHCI_BISTSR 0x00ac
|
|
#define AHCI_BISTDECR 0x00b0
|
|
#define AHCI_DIAGNR0 0x00b4
|
|
#define AHCI_DIAGNR1 0x00b8
|
|
#define AHCI_OOBR 0x00bc
|
|
#define AHCI_PHYCS0R 0x00c0
|
|
#define AHCI_PHYCS1R 0x00c4
|
|
#define AHCI_PHYCS2R 0x00c8
|
|
#define AHCI_TIMER1MS 0x00e0
|
|
#define AHCI_GPARAM1R 0x00e8
|
|
#define AHCI_GPARAM2R 0x00ec
|
|
#define AHCI_PPARAMR 0x00f0
|
|
#define AHCI_TESTR 0x00f4
|
|
#define AHCI_VERSIONR 0x00f8
|
|
#define AHCI_IDR 0x00fc
|
|
#define AHCI_RWCR 0x00fc
|
|
#define AHCI_P0DMACR 0x0170
|
|
#define AHCI_P0PHYCR 0x0178
|
|
#define AHCI_P0PHYSR 0x017c
|
|
|
|
static void sunxi_clrbits(void __iomem *reg, u32 clr_val)
|
|
{
|
|
u32 reg_val;
|
|
|
|
reg_val = readl(reg);
|
|
reg_val &= ~(clr_val);
|
|
writel(reg_val, reg);
|
|
}
|
|
|
|
static void sunxi_setbits(void __iomem *reg, u32 set_val)
|
|
{
|
|
u32 reg_val;
|
|
|
|
reg_val = readl(reg);
|
|
reg_val |= set_val;
|
|
writel(reg_val, reg);
|
|
}
|
|
|
|
static void sunxi_clrsetbits(void __iomem *reg, u32 clr_val, u32 set_val)
|
|
{
|
|
u32 reg_val;
|
|
|
|
reg_val = readl(reg);
|
|
reg_val &= ~(clr_val);
|
|
reg_val |= set_val;
|
|
writel(reg_val, reg);
|
|
}
|
|
|
|
static u32 sunxi_getbits(void __iomem *reg, u8 mask, u8 shift)
|
|
{
|
|
return (readl(reg) >> shift) & mask;
|
|
}
|
|
|
|
static int ahci_sunxi_phy_init(struct device *dev, void __iomem *reg_base)
|
|
{
|
|
u32 reg_val;
|
|
int timeout;
|
|
|
|
/* This magic is from the original code */
|
|
writel(0, reg_base + AHCI_RWCR);
|
|
msleep(5);
|
|
|
|
sunxi_setbits(reg_base + AHCI_PHYCS1R, BIT(19));
|
|
sunxi_clrsetbits(reg_base + AHCI_PHYCS0R,
|
|
(0x7 << 24),
|
|
(0x5 << 24) | BIT(23) | BIT(18));
|
|
sunxi_clrsetbits(reg_base + AHCI_PHYCS1R,
|
|
(0x3 << 16) | (0x1f << 8) | (0x3 << 6),
|
|
(0x2 << 16) | (0x6 << 8) | (0x2 << 6));
|
|
sunxi_setbits(reg_base + AHCI_PHYCS1R, BIT(28) | BIT(15));
|
|
sunxi_clrbits(reg_base + AHCI_PHYCS1R, BIT(19));
|
|
sunxi_clrsetbits(reg_base + AHCI_PHYCS0R,
|
|
(0x7 << 20), (0x3 << 20));
|
|
sunxi_clrsetbits(reg_base + AHCI_PHYCS2R,
|
|
(0x1f << 5), (0x19 << 5));
|
|
msleep(5);
|
|
|
|
sunxi_setbits(reg_base + AHCI_PHYCS0R, (0x1 << 19));
|
|
|
|
timeout = 250; /* Power up takes aprox 50 us */
|
|
do {
|
|
reg_val = sunxi_getbits(reg_base + AHCI_PHYCS0R, 0x7, 28);
|
|
if (reg_val == 0x02)
|
|
break;
|
|
|
|
if (--timeout == 0) {
|
|
dev_err(dev, "PHY power up failed.\n");
|
|
return -EIO;
|
|
}
|
|
udelay(1);
|
|
} while (1);
|
|
|
|
sunxi_setbits(reg_base + AHCI_PHYCS2R, (0x1 << 24));
|
|
|
|
timeout = 100; /* Calibration takes aprox 10 us */
|
|
do {
|
|
reg_val = sunxi_getbits(reg_base + AHCI_PHYCS2R, 0x1, 24);
|
|
if (reg_val == 0x00)
|
|
break;
|
|
|
|
if (--timeout == 0) {
|
|
dev_err(dev, "PHY calibration failed.\n");
|
|
return -EIO;
|
|
}
|
|
udelay(1);
|
|
} while (1);
|
|
|
|
msleep(15);
|
|
|
|
writel(0x7, reg_base + AHCI_RWCR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ahci_sunxi_start_engine(struct ata_port *ap)
|
|
{
|
|
void __iomem *port_mmio = ahci_port_base(ap);
|
|
struct ahci_host_priv *hpriv = ap->host->private_data;
|
|
|
|
/* Setup DMA before DMA start */
|
|
sunxi_clrsetbits(hpriv->mmio + AHCI_P0DMACR, 0x0000ff00, 0x00004400);
|
|
|
|
/* Start DMA */
|
|
sunxi_setbits(port_mmio + PORT_CMD, PORT_CMD_START);
|
|
}
|
|
|
|
static const struct ata_port_info ahci_sunxi_port_info = {
|
|
.flags = AHCI_FLAG_COMMON | ATA_FLAG_NCQ,
|
|
.pio_mask = ATA_PIO4,
|
|
.udma_mask = ATA_UDMA6,
|
|
.port_ops = &ahci_platform_ops,
|
|
};
|
|
|
|
static int ahci_sunxi_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ahci_host_priv *hpriv;
|
|
int rc;
|
|
|
|
hpriv = ahci_platform_get_resources(pdev);
|
|
if (IS_ERR(hpriv))
|
|
return PTR_ERR(hpriv);
|
|
|
|
hpriv->start_engine = ahci_sunxi_start_engine;
|
|
|
|
rc = ahci_platform_enable_resources(hpriv);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = ahci_sunxi_phy_init(dev, hpriv->mmio);
|
|
if (rc)
|
|
goto disable_resources;
|
|
|
|
hpriv->flags = AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_MSI |
|
|
AHCI_HFLAG_YES_NCQ;
|
|
|
|
/*
|
|
* The sunxi sata controller seems to be unable to successfully do a
|
|
* soft reset if no pmp is attached, so disable pmp use unless
|
|
* requested, otherwise directly attached disks do not work.
|
|
*/
|
|
if (!enable_pmp)
|
|
hpriv->flags |= AHCI_HFLAG_NO_PMP;
|
|
|
|
rc = ahci_platform_init_host(pdev, hpriv, &ahci_sunxi_port_info);
|
|
if (rc)
|
|
goto disable_resources;
|
|
|
|
return 0;
|
|
|
|
disable_resources:
|
|
ahci_platform_disable_resources(hpriv);
|
|
return rc;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int ahci_sunxi_resume(struct device *dev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
int rc;
|
|
|
|
rc = ahci_platform_enable_resources(hpriv);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = ahci_sunxi_phy_init(dev, hpriv->mmio);
|
|
if (rc)
|
|
goto disable_resources;
|
|
|
|
rc = ahci_platform_resume_host(dev);
|
|
if (rc)
|
|
goto disable_resources;
|
|
|
|
return 0;
|
|
|
|
disable_resources:
|
|
ahci_platform_disable_resources(hpriv);
|
|
return rc;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(ahci_sunxi_pm_ops, ahci_platform_suspend,
|
|
ahci_sunxi_resume);
|
|
|
|
static const struct of_device_id ahci_sunxi_of_match[] = {
|
|
{ .compatible = "allwinner,sun4i-a10-ahci", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ahci_sunxi_of_match);
|
|
|
|
static struct platform_driver ahci_sunxi_driver = {
|
|
.probe = ahci_sunxi_probe,
|
|
.remove = ata_platform_remove_one,
|
|
.driver = {
|
|
.name = "ahci-sunxi",
|
|
.of_match_table = ahci_sunxi_of_match,
|
|
.pm = &ahci_sunxi_pm_ops,
|
|
},
|
|
};
|
|
module_platform_driver(ahci_sunxi_driver);
|
|
|
|
MODULE_DESCRIPTION("Allwinner sunxi AHCI SATA driver");
|
|
MODULE_AUTHOR("Olliver Schinagl <oliver@schinagl.nl>");
|
|
MODULE_LICENSE("GPL");
|