From: Huan He <hehuan1@xxxxxxxxxxxxxxxxxx>
Add support for the AHCI SATA controller in Eswin's eic7700 soc,
which supports SATA PHY initialization, reset control,
and power management.
Co-developed-by: Yulin Lu <luyulin@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Yulin Lu <luyulin@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Huan He <hehuan1@xxxxxxxxxxxxxxxxxx>
---
drivers/ata/Kconfig | 12 ++
drivers/ata/Makefile | 1 +
drivers/ata/ahci_eic7700.c | 248 +++++++++++++++++++++++++++++++++++++
3 files changed, 261 insertions(+)
create mode 100644 drivers/ata/ahci_eic7700.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index e00536b49552..474c09543006 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -185,6 +185,18 @@ config AHCI_DWC
If unsure, say N.
+config AHCI_EIC7700
+ tristate "Eswin AHCI SATA support"
+ depends on ARCH_ESWIN || COMPILE_TEST
+ select SATA_HOST
+ help
+ This enables the AHCI SATA controller driver for Eswin SoCs. This driver
+ is specific to Eswin SoCs and should only be enabled if using such hardware.
+ The driver supports eic7700 series chips. The controller supports up
+ to 1 port.
+
+ If unsure, say N.
+
config AHCI_ST
tristate "ST AHCI SATA support"
depends on ARCH_STI || COMPILE_TEST
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 20e6645ab737..af00e55fa593 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_AHCI_CEVA) += ahci_ceva.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_DA850) += ahci_da850.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_DM816) += ahci_dm816.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_DWC) += ahci_dwc.o libahci.o libahci_platform.o
+obj-$(CONFIG_AHCI_EIC7700) += ahci_eic7700.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_MTK) += ahci_mtk.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_MVEBU) += ahci_mvebu.o libahci.o libahci_platform.o
diff --git a/drivers/ata/ahci_eic7700.c b/drivers/ata/ahci_eic7700.c
new file mode 100644
index 000000000000..d2b7cafbfdd7
--- /dev/null
+++ b/drivers/ata/ahci_eic7700.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ESWIN EIC7700 AHCI SATA Driver
+ *
+ * Copyright 2024, Beijing ESWIN Computing Technology Co., Ltd.. All rights reserved.
+ *
+ * Authors: Yulin Lu <luyulin@xxxxxxxxxxxxxxxxxx>
+ * Huan He <hehuan1@xxxxxxxxxxxxxxxxxx>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/libata.h>
+#include <linux/ahci_platform.h>
+#include <linux/acpi.h>
+#include <linux/pci_ids.h>
+#include <linux/iommu.h>
+#include <linux/mfd/syscon.h>
+#include <linux/bitfield.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include "ahci.h"
+
+#define DRV_NAME "ahci"
+
+/* Register Definitions */
+#define SATA_REF_CTRL1 0x338
+#define SATA_PHY_CTRL0 0x328
+#define SATA_PHY_CTRL1 0x32c
+#define SATA_LOS_IDEN 0x33c
+#define SATA_AXI_LP_CTRL 0x308
+#define SATA_REG_CTRL 0x334
+#define SATA_MPLL_CTRL 0x320
+#define SATA_RESET_CTRL 0x340
+#define SATA_RESET_CTRL_ASSERT 0x3
+#define SATA_RESET_CTRL_DEASSERT 0x0
+#define SATA_PHY_RESET BIT(0)
+#define SATA_P0_RESET BIT(1)
+#define SATA_LOS_LEVEL 0x9
+#define SATA_LOS_BIAS (0x02 << 16)
+#define SATA_REF_REPEATCLK_EN BIT(0)
+#define SATA_REF_USE_PAD BIT(20)
+#define SATA_P0_AMPLITUDE_GEN1 0x42
+#define SATA_P0_AMPLITUDE_GEN2 (0x46 << 8)
+#define SATA_P0_AMPLITUDE_GEN3 (0x73 << 16)
+#define SATA_P0_PHY_TX_PREEMPH_GEN1 0x05
+#define SATA_P0_PHY_TX_PREEMPH_GEN2 (0x05 << 8)
+#define SATA_P0_PHY_TX_PREEMPH_GEN3 (0x23 << 16)
+#define SATA_MPLL_MULTIPLIER (0x3c << 16)
+#define SATA_M_CSYSREQ BIT(0)
+#define SATA_S_CSYSREQ BIT(16)
+
+struct eswin_ahci_plat {
+ struct reset_control *apb_rst;
+};
+
+static const struct ata_port_info ahci_port_info = {
+ .flags = AHCI_FLAG_COMMON,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &ahci_platform_ops,
+};
+
+static const struct ata_port_info ahci_port_info_nolpm = {
+ .flags = AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
+ .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 eswin_sata_init(struct device *dev)
+{
+ struct regmap *regmap;
+
+ regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "eswin,hsp_sp_csr");
+ if (IS_ERR(regmap)) {
+ dev_dbg(dev, "No hsp_sp_csr phandle specified\n");
+ return -1;
+ }
+
+ regmap_write(regmap, SATA_REF_CTRL1, 0x1);
+ regmap_write(regmap, SATA_PHY_CTRL0, (SATA_P0_AMPLITUDE_GEN1 |
+ SATA_P0_AMPLITUDE_GEN2 |
+ SATA_P0_AMPLITUDE_GEN3));
+ regmap_write(regmap, SATA_PHY_CTRL1, (SATA_P0_PHY_TX_PREEMPH_GEN1 |
+ SATA_P0_PHY_TX_PREEMPH_GEN2 |
+ SATA_P0_PHY_TX_PREEMPH_GEN3));
+ regmap_write(regmap, SATA_LOS_IDEN, SATA_LOS_LEVEL | SATA_LOS_BIAS);
+ regmap_write(regmap, SATA_AXI_LP_CTRL, SATA_M_CSYSREQ | SATA_S_CSYSREQ);
+ regmap_write(regmap, SATA_REG_CTRL, SATA_REF_REPEATCLK_EN | SATA_REF_USE_PAD);
+ regmap_write(regmap, SATA_MPLL_CTRL, SATA_MPLL_MULTIPLIER);
+ regmap_write(regmap, SATA_RESET_CTRL, 0x0);
+
+ return 0;
+}
+
+static int eswin_ahci_platform_resets(struct ahci_host_priv *hpriv,
+ struct device *dev)
+{
+ struct eswin_ahci_plat *plat = hpriv->plat_data;
+ struct regmap *regmap;
+ int ret;
+
+ regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "eswin,hsp_sp_csr");
+ if (IS_ERR(regmap)) {
+ dev_dbg(dev, "No hsp_sp_csr phandle specified\n");
+ return -1;
+ }
+
+ plat->apb_rst = devm_reset_control_get_optional(dev, "apb");
+ if (PTR_ERR(plat->apb_rst) == -EPROBE_DEFER)
+ return PTR_ERR(plat->apb_rst);
+
+ ret = reset_control_assert(plat->apb_rst);
+ if (ret) {
+ dev_err(dev, "failed to assert apb_rst\n");
+ return ret;
+ }
+ regmap_write(regmap, SATA_RESET_CTRL, SATA_RESET_CTRL_ASSERT);
+
+ regmap_write(regmap, SATA_RESET_CTRL, SATA_RESET_CTRL_DEASSERT);
+ ret = reset_control_deassert(plat->apb_rst);
+ if (ret) {
+ dev_err(dev, "failed to deassert apb_rst\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ahci_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ahci_host_priv *hpriv;
+ struct eswin_ahci_plat *plat;
+ const struct ata_port_info *port;
+ int ret;
+
+ plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL);
+ if (!plat)
+ return -ENOMEM;
+
+ hpriv = ahci_platform_get_resources(pdev, 0);
+ if (IS_ERR(hpriv))
+ return PTR_ERR(hpriv);
+
+ hpriv->plat_data = plat;
+ ret = eswin_ahci_platform_resets(hpriv, dev);
+ if (ret)
+ return ret;
+
+ ret = ahci_platform_enable_resources(hpriv);
+ if (ret)
+ return ret;
+
+ eswin_sata_init(dev);
+
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(41));
+ if (ret)
+ return ret;
+
+ of_property_read_u32(dev->of_node, "ports-implemented", &hpriv->saved_port_map);
+
+ if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
+ hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
+
+ port = acpi_device_get_match_data(dev);
+ if (!port)
+ port = &ahci_port_info;
+
+ ret = ahci_platform_init_host(pdev, hpriv, port, &ahci_platform_sht);
+ if (ret)
+ goto disable_resources;
+
+ return 0;
+
+disable_resources:
+ ahci_platform_disable_resources(hpriv);
+ return ret;
+}
+
+static void ahci_remove(struct platform_device *pdev)
+{
+ ata_platform_remove_one(pdev);
+}
+
+static int eswin_ahci_suspend(struct device *dev)
+{
+ int ret;
+
+ ret = ahci_platform_suspend(dev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int eswin_ahci_resume(struct device *dev)
+{
+ int ret;
+
+ ret = ahci_platform_resume(dev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ahci_pm_ops, eswin_ahci_suspend, eswin_ahci_resume);
+
+static const struct of_device_id ahci_of_match[] = {
+ { .compatible = "eswin,eic7700-ahci", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ahci_of_match);
+
+static const struct acpi_device_id ahci_acpi_match[] = {
+ { "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
+ { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
+
+static struct platform_driver ahci_driver = {
+ .probe = ahci_probe,
+ .remove = ahci_remove,
+ .shutdown = ahci_platform_shutdown,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = ahci_of_match,
+ .acpi_match_table = ahci_acpi_match,
+ .pm = &ahci_pm_ops,
+ },
+};
+module_platform_driver(ahci_driver);
+
+MODULE_DESCRIPTION("ESWIN AHCI SATA driver");
+MODULE_AUTHOR("Yulin Lu <luyulin@xxxxxxxxxxxxxxxxxx>");
+MODULE_AUTHOR("Huan He <hehuan1@xxxxxxxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
2.25.1
