[PATCH] SATA: OCTEON: support SATA on OCTEON platform
From: Aleksey Makarov
Date: Mon Jan 19 2015 - 10:24:18 EST
The OCTEON SATA controller is currently found on cn71XX devices.
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
Signed-off-by: Vinita Gupta <vgupta@xxxxxxxxxxxxxxxxxx>
[aleksey.makarov@xxxxxxxxxx: preparing for submission,
conflict resolution, fixes for the platform code]
Signed-off-by: Aleksey Makarov <aleksey.makarov@xxxxxxxxxx>
---
.../devicetree/bindings/ata/ahci-platform.txt | 1 +
.../devicetree/bindings/mips/cavium/sata-uctl.txt | 31 ++++++
arch/mips/cavium-octeon/octeon-platform.c | 1 +
drivers/ata/Kconfig | 9 ++
drivers/ata/Makefile | 1 +
drivers/ata/ahci_platform.c | 10 ++
drivers/ata/sata_octeon.c | 107 +++++++++++++++++++++
7 files changed, 160 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mips/cavium/sata-uctl.txt
create mode 100644 drivers/ata/sata_octeon.c
diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 4ab09f2..1a5d3be 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -11,6 +11,7 @@ Required properties:
- compatible : compatible string, one of:
- "allwinner,sun4i-a10-ahci"
- "hisilicon,hisi-ahci"
+ - "cavium,octeon-7130-ahci"
- "ibm,476gtr-ahci"
- "marvell,armada-380-ahci"
- "snps,dwc-ahci"
diff --git a/Documentation/devicetree/bindings/mips/cavium/sata-uctl.txt b/Documentation/devicetree/bindings/mips/cavium/sata-uctl.txt
new file mode 100644
index 0000000..222e66e
--- /dev/null
+++ b/Documentation/devicetree/bindings/mips/cavium/sata-uctl.txt
@@ -0,0 +1,31 @@
+* UCTL SATA controller glue
+
+Properties:
+- compatible: "cavium,octeon-7130-sata-uctl"
+
+ Compatibility with the cn7130 SOC.
+
+- reg: The base address of the UCTL register bank.
+
+- #address-cells: Must be <2>.
+
+- #size-cells: Must be <2>.
+
+- ranges: Empty to signify direct mapping of the children.
+
+Example:
+
+ uctl@118006c000000 {
+ compatible = "cavium,octeon-7130-sata-uctl";
+ reg = <0x00011800 0x6c000000 0x00000000 0x00000100>;
+ ranges;
+ #address-cells = <0x00000002>;
+ #size-cells = <0x00000002>;
+ sata@16c00 {
+ compatible = "cavium,octeon-7130-ahci";
+ reg = <0x00016c00 0x00000000 0x00000000 0x00000200>;
+ interrupt-parent = <0x0000000d>;
+ interrupts = <0x00000002 0x00000004>;
+ cavium,qlm-trim-alias = "sata";
+ };
+ };
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index b67ddf0..6518231 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -445,6 +445,7 @@ static struct of_device_id __initdata octeon_ids[] = {
{ .compatible = "cavium,octeon-3860-bootbus", },
{ .compatible = "cavium,mdio-mux", },
{ .compatible = "gpio-leds", },
+ { .compatible = "cavium,octeon-7130-sata-uctl", },
{},
};
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a3a1360..28a11fe 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -188,6 +188,15 @@ config SATA_SIL24
If unsure, say N.
+config SATA_OCTEON
+ tristate "Cavium Octeon Soc Serial ATA"
+ depends on SATA_AHCI_PLATFORM && CAVIUM_OCTEON_SOC
+ default y
+ help
+ This option enables support for Cavium Octeon SoC Serial ATA.
+
+ If unsure, say N.
+
config ATA_SFF
bool "ATA SFF support (for legacy IDE and PATA)"
default y
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index ae41107..4a0e5e3 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_TEGRA) += ahci_tegra.o libahci.o libahci_platform.o
obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o libahci.o libahci_platform.o
+obj-$(CONFIG_SATA_OCTEON) += sata_octeon.o
# SFF w/ custom DMA
obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 18d5398..bb36396 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -22,6 +22,12 @@
#include <linux/ahci_platform.h>
#include "ahci.h"
+#if IS_ENABLED(CONFIG_SATA_OCTEON)
+void ahci_octeon_config(struct platform_device *pdev);
+#else
+static inline void ahci_octeon_config(struct platform_device *pdev) {}
+#endif
+
static const struct ata_port_info ahci_port_info = {
.flags = AHCI_FLAG_COMMON,
.pio_mask = ATA_PIO4,
@@ -46,6 +52,9 @@ static int ahci_probe(struct platform_device *pdev)
if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
+ if (of_device_is_compatible(dev->of_node, "cavium,octeon-7130-ahci"))
+ ahci_octeon_config(pdev);
+
rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info);
if (rc)
goto disable_resources;
@@ -67,6 +76,7 @@ static const struct of_device_id ahci_of_match[] = {
{ .compatible = "ibm,476gtr-ahci", },
{ .compatible = "snps,dwc-ahci", },
{ .compatible = "hisilicon,hisi-ahci", },
+ { .compatible = "cavium,octeon-7130-ahci", },
{},
};
MODULE_DEVICE_TABLE(of, ahci_of_match);
diff --git a/drivers/ata/sata_octeon.c b/drivers/ata/sata_octeon.c
new file mode 100644
index 0000000..e24cc27
--- /dev/null
+++ b/drivers/ata/sata_octeon.c
@@ -0,0 +1,107 @@
+/*
+ * SATA glue for Cavium Octeon III SOCs.
+ *
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2010-2015 Cavium Networks
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/bitfield.h>
+
+/**
+ * cvmx_sata_uctl_shim_cfg
+ * from cvmx-sata-defs.h
+ *
+ * Accessible by: only when A_CLKDIV_EN
+ * Reset by: IOI reset (srst_n) or SATA_UCTL_CTL[SATA_UCTL_RST]
+ * This register allows configuration of various shim (UCTL) features.
+ * Fields XS_NCB_OOB_* are captured when there are no outstanding OOB errors
+ * indicated in INTSTAT and a new OOB error arrives.
+ * Fields XS_BAD_DMA_* are captured when there are no outstanding DMA errors
+ * indicated in INTSTAT and a new DMA error arrives.
+ */
+union cvmx_sata_uctl_shim_cfg {
+ uint64_t u64;
+ struct cvmx_sata_uctl_shim_cfg_s {
+ /*
+ * Read/write error log for out-of-bound UAHC register access.
+ * 0 = read, 1 = write.
+ */
+ __BITFIELD_FIELD(uint64_t xs_ncb_oob_wrn : 1,
+ __BITFIELD_FIELD(uint64_t reserved_57_62 : 6,
+ /*
+ * SRCID error log for out-of-bound UAHC register access.
+ * The IOI outbound SRCID for the OOB error.
+ */
+ __BITFIELD_FIELD(uint64_t xs_ncb_oob_osrc : 9,
+ /*
+ * Read/write error log for bad DMA access from UAHC.
+ * 0 = read error log, 1 = write error log.
+ */
+ __BITFIELD_FIELD(uint64_t xm_bad_dma_wrn : 1,
+ __BITFIELD_FIELD(uint64_t reserved_44_46 : 3,
+ /*
+ * ErrType error log for bad DMA access from UAHC. Encodes the type of
+ * error encountered (error largest encoded value has priority).
+ * See SATA_UCTL_XM_BAD_DMA_TYPE_E.
+ */
+ __BITFIELD_FIELD(uint64_t xm_bad_dma_type : 4,
+ __BITFIELD_FIELD(uint64_t reserved_13_39 : 27,
+ /*
+ * Selects the IOI read command used by DMA accesses.
+ * See SATA_UCTL_DMA_READ_CMD_E.
+ */
+ __BITFIELD_FIELD(uint64_t dma_read_cmd : 1,
+ __BITFIELD_FIELD(uint64_t reserved_10_11 : 2,
+ /*
+ * Selects the endian format for DMA accesses to the L2C.
+ * See SATA_UCTL_ENDIAN_MODE_E.
+ */
+ __BITFIELD_FIELD(uint64_t dma_endian_mode : 2,
+ __BITFIELD_FIELD(uint64_t reserved_2_7 : 6,
+ /*
+ * Selects the endian format for IOI CSR accesses to the UAHC.
+ * Note that when UAHC CSRs are accessed via RSL, they are returned
+ * as big-endian. See SATA_UCTL_ENDIAN_MODE_E.
+ */
+ __BITFIELD_FIELD(uint64_t csr_endian_mode : 2,
+ ;))))))))))))
+ } s;
+};
+
+#define CVMX_SATA_UCTL_SHIM_CFG (CVMX_ADD_IO_SEG(0x000118006C0000E8ull))
+
+void ahci_octeon_config(struct platform_device *pdev)
+{
+ union cvmx_sata_uctl_shim_cfg shim_cfg;
+
+ /* set-up endian mode */
+ shim_cfg.u64 = cvmx_read_csr(CVMX_SATA_UCTL_SHIM_CFG);
+#ifdef __BIG_ENDIAN
+ shim_cfg.s.dma_endian_mode = 1;
+ shim_cfg.s.csr_endian_mode = 1;
+#else
+ shim_cfg.s.dma_endian_mode = 0;
+ shim_cfg.s.csr_endian_mode = 0;
+#endif
+ shim_cfg.s.dma_read_cmd = 1; /* No allocate L2C */
+ cvmx_write_csr(CVMX_SATA_UCTL_SHIM_CFG, shim_cfg.u64);
+
+ /* Set a good dma_mask */
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
+ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+}
+EXPORT_SYMBOL(ahci_octeon_config);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cavium, Inc. <support@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Cavium Inc. sata config.");
--
2.2.2
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