mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
![Suneel Garapati](/assets/img/avatar_default.png)
Adds support for Ceva sata host controller on Xilinx Zynq UltraScale+ MPSoC. Signed-off-by: Suneel Garapati <suneel.garapati@xilinx.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
238 lines
6.1 KiB
C
238 lines
6.1 KiB
C
/*
|
|
* Copyright (C) 2015 Xilinx, Inc.
|
|
* CEVA AHCI SATA platform driver
|
|
*
|
|
* based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/ahci_platform.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/libata.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include "ahci.h"
|
|
|
|
/* Vendor Specific Register Offsets */
|
|
#define AHCI_VEND_PCFG 0xA4
|
|
#define AHCI_VEND_PPCFG 0xA8
|
|
#define AHCI_VEND_PP2C 0xAC
|
|
#define AHCI_VEND_PP3C 0xB0
|
|
#define AHCI_VEND_PP4C 0xB4
|
|
#define AHCI_VEND_PP5C 0xB8
|
|
#define AHCI_VEND_PAXIC 0xC0
|
|
#define AHCI_VEND_PTC 0xC8
|
|
|
|
/* Vendor Specific Register bit definitions */
|
|
#define PAXIC_ADBW_BW64 0x1
|
|
#define PAXIC_MAWIDD (1 << 8)
|
|
#define PAXIC_MARIDD (1 << 16)
|
|
#define PAXIC_OTL (0x4 << 20)
|
|
|
|
#define PCFG_TPSS_VAL (0x32 << 16)
|
|
#define PCFG_TPRS_VAL (0x2 << 12)
|
|
#define PCFG_PAD_VAL 0x2
|
|
|
|
#define PPCFG_TTA 0x1FFFE
|
|
#define PPCFG_PSSO_EN (1 << 28)
|
|
#define PPCFG_PSS_EN (1 << 29)
|
|
#define PPCFG_ESDF_EN (1 << 31)
|
|
|
|
#define PP2C_CIBGMN 0x0F
|
|
#define PP2C_CIBGMX (0x25 << 8)
|
|
#define PP2C_CIBGN (0x18 << 16)
|
|
#define PP2C_CINMP (0x29 << 24)
|
|
|
|
#define PP3C_CWBGMN 0x04
|
|
#define PP3C_CWBGMX (0x0B << 8)
|
|
#define PP3C_CWBGN (0x08 << 16)
|
|
#define PP3C_CWNMP (0x0F << 24)
|
|
|
|
#define PP4C_BMX 0x0a
|
|
#define PP4C_BNM (0x08 << 8)
|
|
#define PP4C_SFD (0x4a << 16)
|
|
#define PP4C_PTST (0x06 << 24)
|
|
|
|
#define PP5C_RIT 0x60216
|
|
#define PP5C_RCT (0x7f0 << 20)
|
|
|
|
#define PTC_RX_WM_VAL 0x40
|
|
#define PTC_RSVD (1 << 27)
|
|
|
|
#define PORT0_BASE 0x100
|
|
#define PORT1_BASE 0x180
|
|
|
|
/* Port Control Register Bit Definitions */
|
|
#define PORT_SCTL_SPD_GEN2 (0x2 << 4)
|
|
#define PORT_SCTL_SPD_GEN1 (0x1 << 4)
|
|
#define PORT_SCTL_IPM (0x3 << 8)
|
|
|
|
#define PORT_BASE 0x100
|
|
#define PORT_OFFSET 0x80
|
|
#define NR_PORTS 2
|
|
#define DRV_NAME "ahci-ceva"
|
|
#define CEVA_FLAG_BROKEN_GEN2 1
|
|
|
|
struct ceva_ahci_priv {
|
|
struct platform_device *ahci_pdev;
|
|
int flags;
|
|
};
|
|
|
|
static struct ata_port_operations ahci_ceva_ops = {
|
|
.inherits = &ahci_platform_ops,
|
|
};
|
|
|
|
static const struct ata_port_info ahci_ceva_port_info = {
|
|
.flags = AHCI_FLAG_COMMON,
|
|
.pio_mask = ATA_PIO4,
|
|
.udma_mask = ATA_UDMA6,
|
|
.port_ops = &ahci_ceva_ops,
|
|
};
|
|
|
|
static void ahci_ceva_setup(struct ahci_host_priv *hpriv)
|
|
{
|
|
void __iomem *mmio = hpriv->mmio;
|
|
struct ceva_ahci_priv *cevapriv = hpriv->plat_data;
|
|
u32 tmp;
|
|
int i;
|
|
|
|
/*
|
|
* AXI Data bus width to 64
|
|
* Set Mem Addr Read, Write ID for data transfers
|
|
* Transfer limit to 72 DWord
|
|
*/
|
|
tmp = PAXIC_ADBW_BW64 | PAXIC_MAWIDD | PAXIC_MARIDD | PAXIC_OTL;
|
|
writel(tmp, mmio + AHCI_VEND_PAXIC);
|
|
|
|
/* Set AHCI Enable */
|
|
tmp = readl(mmio + HOST_CTL);
|
|
tmp |= HOST_AHCI_EN;
|
|
writel(tmp, mmio + HOST_CTL);
|
|
|
|
for (i = 0; i < NR_PORTS; i++) {
|
|
/* TPSS TPRS scalars, CISE and Port Addr */
|
|
tmp = PCFG_TPSS_VAL | PCFG_TPRS_VAL | (PCFG_PAD_VAL + i);
|
|
writel(tmp, mmio + AHCI_VEND_PCFG);
|
|
|
|
/* Port Phy Cfg register enables */
|
|
tmp = PPCFG_TTA | PPCFG_PSS_EN | PPCFG_ESDF_EN;
|
|
writel(tmp, mmio + AHCI_VEND_PPCFG);
|
|
|
|
/* Phy Control OOB timing parameters COMINIT */
|
|
tmp = PP2C_CIBGMN | PP2C_CIBGMX | PP2C_CIBGN | PP2C_CINMP;
|
|
writel(tmp, mmio + AHCI_VEND_PP2C);
|
|
|
|
/* Phy Control OOB timing parameters COMWAKE */
|
|
tmp = PP3C_CWBGMN | PP3C_CWBGMX | PP3C_CWBGN | PP3C_CWNMP;
|
|
writel(tmp, mmio + AHCI_VEND_PP3C);
|
|
|
|
/* Phy Control Burst timing setting */
|
|
tmp = PP4C_BMX | PP4C_BNM | PP4C_SFD | PP4C_PTST;
|
|
writel(tmp, mmio + AHCI_VEND_PP4C);
|
|
|
|
/* Rate Change Timer and Retry Interval Timer setting */
|
|
tmp = PP5C_RIT | PP5C_RCT;
|
|
writel(tmp, mmio + AHCI_VEND_PP5C);
|
|
|
|
/* Rx Watermark setting */
|
|
tmp = PTC_RX_WM_VAL | PTC_RSVD;
|
|
writel(tmp, mmio + AHCI_VEND_PTC);
|
|
|
|
/* Default to Gen 2 Speed and Gen 1 if Gen2 is broken */
|
|
tmp = PORT_SCTL_SPD_GEN2 | PORT_SCTL_IPM;
|
|
if (cevapriv->flags & CEVA_FLAG_BROKEN_GEN2)
|
|
tmp = PORT_SCTL_SPD_GEN1 | PORT_SCTL_IPM;
|
|
writel(tmp, mmio + PORT_SCR_CTL + PORT_BASE + PORT_OFFSET * i);
|
|
}
|
|
}
|
|
|
|
static struct scsi_host_template ahci_platform_sht = {
|
|
AHCI_SHT(DRV_NAME),
|
|
};
|
|
|
|
static int ceva_ahci_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct device *dev = &pdev->dev;
|
|
struct ahci_host_priv *hpriv;
|
|
struct ceva_ahci_priv *cevapriv;
|
|
int rc;
|
|
|
|
cevapriv = devm_kzalloc(dev, sizeof(*cevapriv), GFP_KERNEL);
|
|
if (!cevapriv)
|
|
return -ENOMEM;
|
|
|
|
cevapriv->ahci_pdev = pdev;
|
|
|
|
hpriv = ahci_platform_get_resources(pdev);
|
|
if (IS_ERR(hpriv))
|
|
return PTR_ERR(hpriv);
|
|
|
|
rc = ahci_platform_enable_resources(hpriv);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (of_property_read_bool(np, "ceva,broken-gen2"))
|
|
cevapriv->flags = CEVA_FLAG_BROKEN_GEN2;
|
|
|
|
hpriv->plat_data = cevapriv;
|
|
|
|
/* CEVA specific initialization */
|
|
ahci_ceva_setup(hpriv);
|
|
|
|
rc = ahci_platform_init_host(pdev, hpriv, &ahci_ceva_port_info,
|
|
&ahci_platform_sht);
|
|
if (rc)
|
|
goto disable_resources;
|
|
|
|
return 0;
|
|
|
|
disable_resources:
|
|
ahci_platform_disable_resources(hpriv);
|
|
return rc;
|
|
}
|
|
|
|
static int __maybe_unused ceva_ahci_suspend(struct device *dev)
|
|
{
|
|
return ahci_platform_suspend_host(dev);
|
|
}
|
|
|
|
static int __maybe_unused ceva_ahci_resume(struct device *dev)
|
|
{
|
|
return ahci_platform_resume_host(dev);
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(ahci_ceva_pm_ops, ceva_ahci_suspend, ceva_ahci_resume);
|
|
|
|
static const struct of_device_id ceva_ahci_of_match[] = {
|
|
{ .compatible = "ceva,ahci-1v84" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ceva_ahci_of_match);
|
|
|
|
static struct platform_driver ceva_ahci_driver = {
|
|
.probe = ceva_ahci_probe,
|
|
.remove = ata_platform_remove_one,
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.of_match_table = ceva_ahci_of_match,
|
|
.pm = &ahci_ceva_pm_ops,
|
|
},
|
|
};
|
|
module_platform_driver(ceva_ahci_driver);
|
|
|
|
MODULE_DESCRIPTION("CEVA AHCI SATA platform driver");
|
|
MODULE_AUTHOR("Xilinx Inc.");
|
|
MODULE_LICENSE("GPL v2");
|