[PATCH v12 2/3] ata: Add APM X-Gene SoC AHCI SATA host controller driver
Loc Ho
lho at apm.com
Fri Feb 21 12:47:32 EST 2014
This patch adds support for the APM X-Gene SoC AHCI SATA host controller
driver. It requires the corresponding APM X-Gene SoC PHY driver.
Signed-off-by: Loc Ho <lho at apm.com>
Signed-off-by: Tuan Phan <tphan at apm.com>
Signed-off-by: Suman Tripathi <stripathi at apm.com>
---
drivers/ata/Kconfig | 8 +
drivers/ata/Makefile | 1 +
drivers/ata/ahci_xgene.c | 540 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 549 insertions(+), 0 deletions(-)
create mode 100644 drivers/ata/ahci_xgene.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index cc67cc0..174e398 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -115,6 +115,14 @@ config AHCI_SUNXI
If unsure, say N.
+config AHCI_XGENE
+ tristate "APM X-Gene 6.0Gbps AHCI SATA host controller support"
+ depends on ARM64 || COMPILE_TEST
+ select SATA_AHCI_PLATFORM
+ select PHY_XGENE
+ help
+ This option enables support for APM X-Gene SoC SATA host controller.
+
config SATA_FSL
tristate "Freescale 3.0Gbps SATA support"
depends on FSL_SOC
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 246050b..72b423b 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
obj-$(CONFIG_AHCI_IMX) += ahci_imx.o
obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o
+obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o
# SFF w/ custom DMA
obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
new file mode 100644
index 0000000..be0c4fc
--- /dev/null
+++ b/drivers/ata/ahci_xgene.c
@@ -0,0 +1,540 @@
+/*
+ * AppliedMicro X-Gene SoC SATA Host Controller Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Author: Loc Ho <lho at apm.com>
+ * Tuan Phan <tphan at apm.com>
+ * Suman Tripathi <stripathi at apm.com>
+ *
+ * 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 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that 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/module.h>
+#include <linux/platform_device.h>
+#include <linux/ahci_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/phy/phy.h>
+#include "ahci.h"
+
+/* Controller who PHY shared with SGMII Ethernet PHY */
+#define XGENE_AHCI_SGMII_DTS "apm,xgene-ahci-sgmii"
+
+/* Controller who PHY (internal reference clock macro) shared with PCIe */
+#define XGENE_AHCI_PCIE_DTS "apm,xgene-ahci-pcie"
+
+/* Max # of disk per a controller */
+#define MAX_AHCI_CHN_PERCTR 2
+
+#define SATA_ENET_MUX_OFFSET 0x00007000
+#define SATA_DIAG_OFFSET 0x0000D000
+#define SATA_GLB_OFFSET 0x0000D850
+#define SATA_SHIM_OFFSET 0x0000E000
+#define SATA_MASTER_OFFSET 0x0000F000
+#define SATA_PORT0_OFFSET 0x00000100
+#define SATA_PORT1_OFFSET 0x00000180
+
+/* MUX CSR */
+#define SATA_ENET_CONFIG_REG 0x00000000
+#define CFG_SATA_ENET_SELECT_MASK 0x00000001
+
+/* SATA host controller CSR */
+#define SLVRDERRATTRIBUTES 0x00000000
+#define SLVWRERRATTRIBUTES 0x00000004
+#define MSTRDERRATTRIBUTES 0x00000008
+#define MSTWRERRATTRIBUTES 0x0000000c
+#define BUSCTLREG 0x00000014
+#define IOFMSTRWAUX 0x00000018
+#define INTSTATUSMASK 0x0000002c
+#define ERRINTSTATUS 0x00000030
+#define ERRINTSTATUSMASK 0x00000034
+
+/* SATA host AHCI CSR */
+#define PORTCFG 0x000000a4
+#define PORTADDR_SET(dst, src) \
+ (((dst) & ~0x0000003f) | (((u32)(src)) & 0x0000003f))
+#define PORTPHY1CFG 0x000000a8
+#define PORTPHY1CFG_FRCPHYRDY_SET(dst, src) \
+ (((dst) & ~0x00100000) | (((u32)(src) << 0x14) & 0x00100000))
+#define PORTPHY2CFG 0x000000ac
+#define PORTPHY3CFG 0x000000b0
+#define PORTPHY4CFG 0x000000b4
+#define PORTPHY5CFG 0x000000b8
+#define SCTL0 0x0000012C
+#define PORTPHY5CFG_RTCHG_SET(dst, src) \
+ (((dst) & ~0xfff00000) | (((u32)(src) << 0x14) & 0xfff00000))
+#define PORTAXICFG_EN_CONTEXT_SET(dst, src) \
+ (((dst) & ~0x01000000) | (((u32)(src) << 0x18) & 0x01000000))
+#define PORTAXICFG 0x000000bc
+#define PORTAXICFG_OUTTRANS_SET(dst, src) \
+ (((dst) & ~0x00f00000) | (((u32)(src) << 0x14) & 0x00f00000))
+
+/* SATA host controller slave CSR */
+#define INT_SLV_TMOMASK 0x00000010
+
+/* SATA global diagnostic CSR */
+#define CFG_MEM_RAM_SHUTDOWN 0x00000070
+#define BLOCK_MEM_RDY 0x00000074
+
+#define pdata_to_ctx(x) container_of(x, struct xgene_ahci_context, plat_data)
+
+struct xgene_ahci_context {
+ struct ahci_platform_data plat_data;
+ struct ahci_host_priv *hpriv;
+ struct device *dev;
+ void __iomem *csr_base; /* CSR base address of IP */
+ struct phy *phy;
+};
+
+static int xgene_ahci_init_memram(struct xgene_ahci_context *ctx)
+{
+ void __iomem *diagcsr = ctx->csr_base + SATA_DIAG_OFFSET;
+ int try;
+ u32 val;
+
+ val = readl(diagcsr + CFG_MEM_RAM_SHUTDOWN);
+ if (val == 0) {
+ dev_dbg(ctx->dev, "memory already released from shutdown\n");
+ return 0;
+ }
+ dev_dbg(ctx->dev, "Release memory from shutdown\n");
+ /* SATA controller memory in shutdown. Remove from shutdown. */
+ writel(0x0, diagcsr + CFG_MEM_RAM_SHUTDOWN);
+ readl(diagcsr + CFG_MEM_RAM_SHUTDOWN); /* Force a barrier */
+
+ /* Check for at least ~1ms */
+ try = 1000;
+ do {
+ val = readl(diagcsr + BLOCK_MEM_RDY);
+ if (val != 0xFFFFFFFF)
+ usleep_range(1, 100);
+ } while (val != 0xFFFFFFFF && try-- > 0);
+ if (try <= 0) {
+ dev_err(ctx->dev, "failed to release memory from shutdown\n");
+ return -ENODEV;
+ }
+ return 0;
+}
+
+/**
+ * Custom Query ID command
+ *
+ * Due to HW errata, we must stop and re-start the port state machine after
+ * read ID command. Also disable support for DEVSLP as hardware don't support
+ * it.
+ */
+static unsigned int xgene_ahci_read_id(struct ata_device *dev,
+ struct ata_taskfile *tf, u16 *id)
+{
+ u32 err_mask;
+ void __iomem *port_mmio = ahci_port_base(dev->link->ap);
+
+ err_mask = ata_do_dev_read_id(dev, tf, id);
+ if (err_mask)
+ return err_mask;
+
+ /*
+ * Mask reserved area. Bit78 spec of Link Power Management
+ * bit15-8: reserved
+ * bit7: NCQ autosence
+ * bit6: Software settings preservation supported
+ * bit5: reserved
+ * bit4: In-order sata delivery supported
+ * bit3: DIPM requests supported
+ * bit2: DMA Setup FIS Auto-Activate optimization supported
+ * bit1: DMA Setup FIX non-Zero buffer offsets supported
+ * bit0: Reserved
+ *
+ * Clear reserved bit (DEVSLP bit) as we don't support DEVSLP
+ */
+ id[78] &= 0x00FF;
+
+ /* Restart the port if required due to HW errata */
+ if (!readl(port_mmio + PORT_CMD_ISSUE)) {
+ writel(PORT_CMD_FIS_RX, port_mmio + PORT_CMD);
+ readl(port_mmio + PORT_CMD); /* Force a barrier */
+ writel(PORT_CMD_FIS_RX | PORT_CMD_START, port_mmio + PORT_CMD);
+ readl(port_mmio + PORT_CMD); /* Force a barrier */
+ }
+ return 0;
+}
+
+static void xgene_ahci_force_phy_rdy(struct xgene_ahci_context *ctx,
+ int channel, int force)
+{
+ void __iomem *mmio = ctx->hpriv->mmio;
+ u32 val;
+
+ val = readl(mmio + PORTCFG);
+ val = PORTADDR_SET(val, channel == 0 ? 2 : 3);
+ writel(val, mmio + PORTCFG);
+ readl(mmio + PORTCFG); /* Force a barrier */
+ val = readl(mmio + PORTPHY1CFG);
+ val = PORTPHY1CFG_FRCPHYRDY_SET(val, force);
+ writel(val, mmio + PORTPHY1CFG);
+}
+
+static void xgene_ahci_set_phy_cfg(struct xgene_ahci_context *ctx, int channel)
+{
+ void __iomem *mmio = ctx->hpriv->mmio;
+ u32 val;
+
+ dev_dbg(ctx->dev, "port configure mmio 0x%p channel %d\n",
+ mmio, channel);
+ val = readl(mmio + PORTCFG);
+ val = PORTADDR_SET(val, channel == 0 ? 2 : 3);
+ writel(val, mmio + PORTCFG);
+ readl(mmio + PORTCFG); /* Force a barrier */
+ /* Disable fix rate */
+ writel(0x0001fffe, mmio + PORTPHY1CFG);
+ readl(mmio + PORTPHY1CFG); /* Force a barrier */
+ writel(0x5018461c, mmio + PORTPHY2CFG);
+ readl(mmio + PORTPHY2CFG); /* Force a barrier */
+ writel(0x1c081907, mmio + PORTPHY3CFG);
+ readl(mmio + PORTPHY3CFG); /* Force a barrier */
+ writel(0x1c080815, mmio + PORTPHY4CFG);
+ readl(mmio + PORTPHY4CFG); /* Force a barrier */
+ /* Set window negotiation */
+ val = readl(mmio + PORTPHY5CFG);
+ val = PORTPHY5CFG_RTCHG_SET(val, 0x300);
+ writel(val, mmio + PORTPHY5CFG);
+ readl(mmio + PORTPHY5CFG); /* Force a barrier */
+ val = readl(mmio + PORTAXICFG);
+ val = PORTAXICFG_EN_CONTEXT_SET(val, 0x1); /* Enable context mgmt */
+ val = PORTAXICFG_OUTTRANS_SET(val, 0xe); /* Set outstanding */
+ writel(val, mmio + PORTAXICFG);
+ readl(mmio + PORTAXICFG); /* Force a barrier */
+}
+
+static int xgene_ahci_phy_restart(struct ata_link *link)
+{
+ struct ata_port *port = link->ap;
+ struct ahci_host_priv *hpriv = port->host->private_data;
+ struct xgene_ahci_context *ctx = pdata_to_ctx(hpriv->plat_data);
+
+ xgene_ahci_force_phy_rdy(ctx, port->port_no, 1);
+ xgene_ahci_force_phy_rdy(ctx, port->port_no, 0);
+ return 0;
+}
+
+static int xgene_ahci_do_hardreset(struct ata_link *link,
+ unsigned long deadline, bool *online)
+{
+ const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
+ struct ata_port *ap = link->ap;
+ struct ahci_host_priv *hpriv = ap->host->private_data;
+ struct xgene_ahci_context *ctx = pdata_to_ctx(hpriv->plat_data);
+ struct ahci_port_priv *pp = ap->private_data;
+ u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
+ void __iomem *port_mmio = ahci_port_base(ap);
+ struct ata_taskfile tf;
+ int first_time = 1;
+ int rc;
+ u32 val;
+ int i;
+
+hardreset_retry:
+ /* clear D2H reception area to properly wait for D2H FIS */
+ ata_tf_init(link->device, &tf);
+ tf.command = ATA_BUSY;
+ ata_tf_to_fis(&tf, 0, 0, d2h_fis);
+ rc = sata_link_hardreset(link, timing, deadline, online,
+ ahci_check_ready);
+
+ if (*online) {
+ /* Check to ensure that the disk comes up in matching speed */
+ if (first_time) {
+ u32 gen_speed;
+
+ first_time = 0;
+ sata_scr_read(link, SCR_STATUS, &gen_speed);
+ gen_speed = (gen_speed >> 4) & 0xf;
+ if (gen_speed == 1 || gen_speed == 2) {
+ /*
+ * For Gen2/1 and first time, let's check again
+ * with Gen2/1 PHY to ensure actual Gen2/1 disk.
+ */
+ phy_set_speed(ctx->phy, ap->port_no,
+ gen_speed == 2 ? 3000000000ULL :
+ 1500000000ULL);
+ xgene_ahci_phy_restart(link);
+ goto hardreset_retry;
+ }
+ }
+
+ /* Clear SER_DISPARITY/SER_10B_8B_ERR if set due to errata */
+ for (i = 0; i < 5; i++) {
+ /* Check if error bit set */
+ val = readl(port_mmio + PORT_SCR_ERR);
+ if (!(val & (SERR_DISPARITY | SERR_10B_8B_ERR)))
+ break;
+ /* Clear any error due to errata */
+ xgene_ahci_force_phy_rdy(ctx, ap->port_no, 1);
+ /* Reset the PHY Rx path */
+ phy_set_speed(ctx->phy, ap->port_no, 0);
+ xgene_ahci_force_phy_rdy(ctx, ap->port_no, 0);
+ /* Clear all errors */
+ val = readl(port_mmio + PORT_SCR_ERR);
+ writel(val, port_mmio + PORT_SCR_ERR);
+ }
+ }
+
+ /* clear all errors if any pending */
+ val = readl(port_mmio + PORT_SCR_ERR);
+ writel(val, port_mmio + PORT_SCR_ERR);
+
+ return rc;
+}
+
+static int xgene_ahci_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ struct ahci_host_priv *hpriv = ap->host->private_data;
+ void __iomem *port_mmio = ahci_port_base(ap);
+ bool online;
+ int rc;
+ int portcmd_saved;
+ u32 portclb_saved;
+ u32 portclbhi_saved;
+ u32 portrxfis_saved;
+ u32 portrxfishi_saved;
+
+ /* As hardreset reset these CSR, let save it to restore later */
+ portcmd_saved = readl(port_mmio + PORT_CMD);
+ portclb_saved = readl(port_mmio + PORT_LST_ADDR);
+ portclbhi_saved = readl(port_mmio + PORT_LST_ADDR_HI);
+ portrxfis_saved = readl(port_mmio + PORT_FIS_ADDR);
+ portrxfishi_saved = readl(port_mmio + PORT_FIS_ADDR_HI);
+
+ ahci_stop_engine(ap);
+
+ rc = xgene_ahci_do_hardreset(link, deadline, &online);
+
+ /* As controller hardreset clear them, let restore them */
+ writel(portcmd_saved, port_mmio + PORT_CMD);
+ writel(portclb_saved, port_mmio + PORT_LST_ADDR);
+ writel(portclbhi_saved, port_mmio + PORT_LST_ADDR_HI);
+ writel(portrxfis_saved, port_mmio + PORT_FIS_ADDR);
+ writel(portrxfishi_saved, port_mmio + PORT_FIS_ADDR_HI);
+
+ hpriv->start_engine(ap);
+
+ if (online)
+ *class = ahci_dev_classify(ap);
+
+ return rc;
+}
+
+static struct ata_port_operations xgene_ahci_ops = {
+ .inherits = &ahci_ops,
+ .hardreset = xgene_ahci_hardreset,
+ .read_id = xgene_ahci_read_id,
+};
+
+static const struct ata_port_info xgene_ahci_port_info = {
+ AHCI_HFLAGS(AHCI_HFLAG_NO_PMP | AHCI_HFLAG_YES_NCQ),
+ .flags = AHCI_FLAG_COMMON | ATA_FLAG_NCQ,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &xgene_ahci_ops,
+};
+
+static int xgene_ahci_hw_init(struct ahci_host_priv *hpriv)
+{
+ struct xgene_ahci_context *ctx = pdata_to_ctx(hpriv->plat_data);
+ int i;
+ int rc;
+ u32 val;
+
+ /* Remove IP RAM out of shutdown */
+ rc = xgene_ahci_init_memram(ctx);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < MAX_AHCI_CHN_PERCTR; i++)
+ xgene_ahci_set_phy_cfg(ctx, i);
+
+ /* AXI disable Mask */
+ writel(0xffffffff, hpriv->mmio + HOST_IRQ_STAT);
+ readl(hpriv->mmio + HOST_IRQ_STAT); /* Force a barrier */
+ writel(0, ctx->csr_base + INTSTATUSMASK);
+ readl(ctx->csr_base + INTSTATUSMASK); /* Force a barrier */
+ dev_dbg(ctx->dev, "top level interrupt mask 0x%X value 0x%08X\n",
+ INTSTATUSMASK, val);
+
+ writel(0x0, ctx->csr_base + ERRINTSTATUSMASK);
+ readl(ctx->csr_base + ERRINTSTATUSMASK); /* Force a barrier */
+ writel(0x0, ctx->csr_base + SATA_SHIM_OFFSET + INT_SLV_TMOMASK);
+ readl(ctx->csr_base + SATA_SHIM_OFFSET + INT_SLV_TMOMASK);
+
+ /* Enable AXI Interrupt */
+ writel(0xffffffff, ctx->csr_base + SLVRDERRATTRIBUTES);
+ writel(0xffffffff, ctx->csr_base + SLVWRERRATTRIBUTES);
+ writel(0xffffffff, ctx->csr_base + MSTRDERRATTRIBUTES);
+ writel(0xffffffff, ctx->csr_base + MSTWRERRATTRIBUTES);
+
+ /* Enable coherency */
+ val = readl(ctx->csr_base + BUSCTLREG);
+ val &= ~0x00000002; /* Enable write coherency */
+ val &= ~0x00000001; /* Enable read coherency */
+ writel(val, ctx->csr_base + BUSCTLREG);
+
+ val = readl(ctx->csr_base + IOFMSTRWAUX);
+ val |= (1 << 3); /* Enable read coherency */
+ val |= (1 << 9); /* Enable write coherency */
+ writel(val, ctx->csr_base + IOFMSTRWAUX);
+ val = readl(ctx->csr_base + IOFMSTRWAUX);
+ dev_dbg(ctx->dev, "coherency 0x%X value 0x%08X\n",
+ IOFMSTRWAUX, val);
+
+ return rc;
+}
+
+static int xgene_ahci_mux_select(struct xgene_ahci_context *ctx)
+{
+ void *mux_csr = ctx->csr_base + SATA_ENET_MUX_OFFSET;
+ u32 val;
+
+ val = readl(mux_csr + SATA_ENET_CONFIG_REG);
+ val &= ~CFG_SATA_ENET_SELECT_MASK;
+ writel(val, mux_csr + SATA_ENET_CONFIG_REG);
+ val = readl(mux_csr + SATA_ENET_CONFIG_REG);
+ return val & CFG_SATA_ENET_SELECT_MASK ? -1 : 0;
+}
+
+static int xgene_ahci_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ahci_host_priv *hpriv;
+ struct xgene_ahci_context *hplat_data;
+ struct resource *res;
+ int rc;
+
+ hpriv = ahci_platform_get_resources(pdev);
+ if (IS_ERR(hpriv))
+ return PTR_ERR(hpriv);
+
+ hplat_data = devm_kzalloc(dev, sizeof(*hplat_data), GFP_KERNEL);
+ if (!hplat_data) {
+ dev_err(dev, "can't allocate host context\n");
+ return -ENOMEM;
+ }
+ hpriv->plat_data = hplat_data;
+ hplat_data->hpriv = hpriv;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ dev_err(dev, "no csr space\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Can't use devm_ioremap_resource due to overlapping region.
+ * 0xYYYY.0000 - host core
+ * 0xYYYY.7000 - Mux (if applicable)
+ * 0xYYYY.A000 - PHY indirect access
+ * 0xYYYY.C000 - Clock
+ * 0xYYYY.D000 - RAM shutdown removal
+ * As we map the entire region as one, it overlaps with the PHY driver.
+ */
+ hplat_data->csr_base = devm_ioremap(dev, res->start,
+ resource_size(res));
+ if (!hplat_data->csr_base) {
+ dev_err(dev, "can't map %pR\n", res);
+ return -ENOMEM;
+ }
+
+ dev_dbg(dev, "VAddr 0x%p Mmio VAddr 0x%p\n", hplat_data->csr_base,
+ hpriv->mmio);
+
+ /* Select ATA */
+ if (of_device_is_compatible(pdev->dev.of_node,
+ XGENE_AHCI_SGMII_DTS)) {
+ if (xgene_ahci_mux_select(hplat_data)) {
+ dev_err(dev, "SATA mux selection failed\n");
+ return -ENODEV;
+ }
+ }
+
+ rc = ahci_platform_enable_resources(hpriv);
+ if (rc)
+ goto put_resources;
+
+ /* HW requires toggle of the clock */
+ ahci_platform_disable_clks(hpriv);
+ rc = ahci_platform_enable_clks(hpriv);
+ if (rc)
+ goto put_resources;
+
+ /* Configure the PHY */
+ hplat_data->phy = devm_phy_get(dev, "sata-6g");
+ if (!hplat_data->phy) {
+ dev_err(dev, "no PHY available\n");
+ rc = -ENODEV;
+ goto disable_resources;
+ }
+
+ rc = phy_init(hplat_data->phy);
+ if (rc) {
+ dev_err(dev, "PHY initialize failed %d\n", rc);
+ goto disable_resources;
+ }
+
+ /* Configure the host controller */
+ xgene_ahci_hw_init(hpriv);
+
+ /* Setup DMA mask - 32 for 32-bit system and 64 for 64-bit system */
+ rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(8*sizeof(void *)));
+ if (rc) {
+ dev_err(dev, "Unable to set dma mask\n");
+ goto disable_resources;
+ }
+
+ rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info, 0, 0);
+ if (rc)
+ goto disable_resources;
+
+ dev_dbg(dev, "X-Gene SATA host controller initialized\n");
+ return 0;
+
+disable_resources:
+ ahci_platform_disable_resources(hpriv);
+put_resources:
+ ahci_platform_put_resources(hpriv);
+ return rc;
+}
+
+static const struct of_device_id xgene_ahci_of_match[] = {
+ {.compatible = XGENE_AHCI_SGMII_DTS,},
+ {.compatible = XGENE_AHCI_PCIE_DTS,},
+ {},
+};
+MODULE_DEVICE_TABLE(of, xgene_ahci_of_match);
+
+static struct platform_driver xgene_ahci_driver = {
+ .driver = {
+ .name = "xgene-ahci",
+ .owner = THIS_MODULE,
+ .of_match_table = xgene_ahci_of_match,
+ },
+ .probe = xgene_ahci_probe,
+};
+
+module_platform_driver(xgene_ahci_driver);
+
+MODULE_DESCRIPTION("APM X-Gene AHCI SATA driver");
+MODULE_AUTHOR("Loc Ho <lho at apm.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.4");
--
1.5.5
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