[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/ata/sata_gemini.c b/src/kernel/linux/v4.14/drivers/ata/sata_gemini.c
new file mode 100644
index 0000000..46950e0
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/ata/sata_gemini.c
@@ -0,0 +1,439 @@
+/*
+ * Cortina Systems Gemini SATA bridge add-on to Faraday FTIDE010
+ * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/bitops.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/reset.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/pinctrl/consumer.h>
+#include "sata_gemini.h"
+
+#define DRV_NAME "gemini_sata_bridge"
+
+/**
+ * struct sata_gemini - a state container for a Gemini SATA bridge
+ * @dev: the containing device
+ * @base: remapped I/O memory base
+ * @muxmode: the current muxing mode
+ * @ide_pins: if the device is using the plain IDE interface pins
+ * @sata_bridge: if the device enables the SATA bridge
+ * @sata0_reset: SATA0 reset handler
+ * @sata1_reset: SATA1 reset handler
+ * @sata0_pclk: SATA0 PCLK handler
+ * @sata1_pclk: SATA1 PCLK handler
+ */
+struct sata_gemini {
+ struct device *dev;
+ void __iomem *base;
+ enum gemini_muxmode muxmode;
+ bool ide_pins;
+ bool sata_bridge;
+ struct reset_control *sata0_reset;
+ struct reset_control *sata1_reset;
+ struct clk *sata0_pclk;
+ struct clk *sata1_pclk;
+};
+
+/* Miscellaneous Control Register */
+#define GEMINI_GLOBAL_MISC_CTRL 0x30
+/*
+ * Values of IDE IOMUX bits in the misc control register
+ *
+ * Bits 26:24 are "IDE IO Select", which decides what SATA
+ * adapters are connected to which of the two IDE/ATA
+ * controllers in the Gemini. We can connect the two IDE blocks
+ * to one SATA adapter each, both acting as master, or one IDE
+ * blocks to two SATA adapters so the IDE block can act in a
+ * master/slave configuration.
+ *
+ * We also bring out different blocks on the actual IDE
+ * pins (not SATA pins) if (and only if) these are muxed in.
+ *
+ * 111-100 - Reserved
+ * Mode 0: 000 - ata0 master <-> sata0
+ * ata1 master <-> sata1
+ * ata0 slave interface brought out on IDE pads
+ * Mode 1: 001 - ata0 master <-> sata0
+ * ata1 master <-> sata1
+ * ata1 slave interface brought out on IDE pads
+ * Mode 2: 010 - ata1 master <-> sata1
+ * ata1 slave <-> sata0
+ * ata0 master and slave interfaces brought out
+ * on IDE pads
+ * Mode 3: 011 - ata0 master <-> sata0
+ * ata1 slave <-> sata1
+ * ata1 master and slave interfaces brought out
+ * on IDE pads
+ */
+#define GEMINI_IDE_IOMUX_MASK (7 << 24)
+#define GEMINI_IDE_IOMUX_MODE0 (0 << 24)
+#define GEMINI_IDE_IOMUX_MODE1 (1 << 24)
+#define GEMINI_IDE_IOMUX_MODE2 (2 << 24)
+#define GEMINI_IDE_IOMUX_MODE3 (3 << 24)
+#define GEMINI_IDE_IOMUX_SHIFT (24)
+
+/*
+ * Registers directly controlling the PATA<->SATA adapters
+ */
+#define GEMINI_SATA_ID 0x00
+#define GEMINI_SATA_PHY_ID 0x04
+#define GEMINI_SATA0_STATUS 0x08
+#define GEMINI_SATA1_STATUS 0x0c
+#define GEMINI_SATA0_CTRL 0x18
+#define GEMINI_SATA1_CTRL 0x1c
+
+#define GEMINI_SATA_STATUS_BIST_DONE BIT(5)
+#define GEMINI_SATA_STATUS_BIST_OK BIT(4)
+#define GEMINI_SATA_STATUS_PHY_READY BIT(0)
+
+#define GEMINI_SATA_CTRL_PHY_BIST_EN BIT(14)
+#define GEMINI_SATA_CTRL_PHY_FORCE_IDLE BIT(13)
+#define GEMINI_SATA_CTRL_PHY_FORCE_READY BIT(12)
+#define GEMINI_SATA_CTRL_PHY_AFE_LOOP_EN BIT(10)
+#define GEMINI_SATA_CTRL_PHY_DIG_LOOP_EN BIT(9)
+#define GEMINI_SATA_CTRL_HOTPLUG_DETECT_EN BIT(4)
+#define GEMINI_SATA_CTRL_ATAPI_EN BIT(3)
+#define GEMINI_SATA_CTRL_BUS_WITH_20 BIT(2)
+#define GEMINI_SATA_CTRL_SLAVE_EN BIT(1)
+#define GEMINI_SATA_CTRL_EN BIT(0)
+
+/*
+ * There is only ever one instance of this bridge on a system,
+ * so create a singleton so that the FTIDE010 instances can grab
+ * a reference to it.
+ */
+static struct sata_gemini *sg_singleton;
+
+struct sata_gemini *gemini_sata_bridge_get(void)
+{
+ if (sg_singleton)
+ return sg_singleton;
+ return ERR_PTR(-EPROBE_DEFER);
+}
+EXPORT_SYMBOL(gemini_sata_bridge_get);
+
+bool gemini_sata_bridge_enabled(struct sata_gemini *sg, bool is_ata1)
+{
+ if (!sg->sata_bridge)
+ return false;
+ /*
+ * In muxmode 2 and 3 one of the ATA controllers is
+ * actually not connected to any SATA bridge.
+ */
+ if ((sg->muxmode == GEMINI_MUXMODE_2) &&
+ !is_ata1)
+ return false;
+ if ((sg->muxmode == GEMINI_MUXMODE_3) &&
+ is_ata1)
+ return false;
+
+ return true;
+}
+EXPORT_SYMBOL(gemini_sata_bridge_enabled);
+
+enum gemini_muxmode gemini_sata_get_muxmode(struct sata_gemini *sg)
+{
+ return sg->muxmode;
+}
+EXPORT_SYMBOL(gemini_sata_get_muxmode);
+
+static int gemini_sata_setup_bridge(struct sata_gemini *sg,
+ unsigned int bridge)
+{
+ unsigned long timeout = jiffies + (HZ * 1);
+ bool bridge_online;
+ u32 val;
+
+ if (bridge == 0) {
+ val = GEMINI_SATA_CTRL_HOTPLUG_DETECT_EN | GEMINI_SATA_CTRL_EN;
+ /* SATA0 slave mode is only used in muxmode 2 */
+ if (sg->muxmode == GEMINI_MUXMODE_2)
+ val |= GEMINI_SATA_CTRL_SLAVE_EN;
+ writel(val, sg->base + GEMINI_SATA0_CTRL);
+ } else {
+ val = GEMINI_SATA_CTRL_HOTPLUG_DETECT_EN | GEMINI_SATA_CTRL_EN;
+ /* SATA1 slave mode is only used in muxmode 3 */
+ if (sg->muxmode == GEMINI_MUXMODE_3)
+ val |= GEMINI_SATA_CTRL_SLAVE_EN;
+ writel(val, sg->base + GEMINI_SATA1_CTRL);
+ }
+
+ /* Vendor code waits 10 ms here */
+ msleep(10);
+
+ /* Wait for PHY to become ready */
+ do {
+ msleep(100);
+
+ if (bridge == 0)
+ val = readl(sg->base + GEMINI_SATA0_STATUS);
+ else
+ val = readl(sg->base + GEMINI_SATA1_STATUS);
+ if (val & GEMINI_SATA_STATUS_PHY_READY)
+ break;
+ } while (time_before(jiffies, timeout));
+
+ bridge_online = !!(val & GEMINI_SATA_STATUS_PHY_READY);
+
+ dev_info(sg->dev, "SATA%d PHY %s\n", bridge,
+ bridge_online ? "ready" : "not ready");
+
+ return bridge_online ? 0: -ENODEV;
+}
+
+int gemini_sata_start_bridge(struct sata_gemini *sg, unsigned int bridge)
+{
+ struct clk *pclk;
+ int ret;
+
+ if (bridge == 0)
+ pclk = sg->sata0_pclk;
+ else
+ pclk = sg->sata1_pclk;
+ clk_enable(pclk);
+ msleep(10);
+
+ /* Do not keep clocking a bridge that is not online */
+ ret = gemini_sata_setup_bridge(sg, bridge);
+ if (ret)
+ clk_disable(pclk);
+
+ return ret;
+}
+EXPORT_SYMBOL(gemini_sata_start_bridge);
+
+void gemini_sata_stop_bridge(struct sata_gemini *sg, unsigned int bridge)
+{
+ if (bridge == 0)
+ clk_disable(sg->sata0_pclk);
+ else if (bridge == 1)
+ clk_disable(sg->sata1_pclk);
+}
+EXPORT_SYMBOL(gemini_sata_stop_bridge);
+
+int gemini_sata_reset_bridge(struct sata_gemini *sg,
+ unsigned int bridge)
+{
+ if (bridge == 0)
+ reset_control_reset(sg->sata0_reset);
+ else
+ reset_control_reset(sg->sata1_reset);
+ msleep(10);
+ return gemini_sata_setup_bridge(sg, bridge);
+}
+EXPORT_SYMBOL(gemini_sata_reset_bridge);
+
+static int gemini_sata_bridge_init(struct sata_gemini *sg)
+{
+ struct device *dev = sg->dev;
+ u32 sata_id, sata_phy_id;
+ int ret;
+
+ sg->sata0_pclk = devm_clk_get(dev, "SATA0_PCLK");
+ if (IS_ERR(sg->sata0_pclk)) {
+ dev_err(dev, "no SATA0 PCLK");
+ return -ENODEV;
+ }
+ sg->sata1_pclk = devm_clk_get(dev, "SATA1_PCLK");
+ if (IS_ERR(sg->sata1_pclk)) {
+ dev_err(dev, "no SATA1 PCLK");
+ return -ENODEV;
+ }
+
+ ret = clk_prepare_enable(sg->sata0_pclk);
+ if (ret) {
+ pr_err("failed to enable SATA0 PCLK\n");
+ return ret;
+ }
+ ret = clk_prepare_enable(sg->sata1_pclk);
+ if (ret) {
+ pr_err("failed to enable SATA1 PCLK\n");
+ clk_disable_unprepare(sg->sata0_pclk);
+ return ret;
+ }
+
+ sg->sata0_reset = devm_reset_control_get_exclusive(dev, "sata0");
+ if (IS_ERR(sg->sata0_reset)) {
+ dev_err(dev, "no SATA0 reset controller\n");
+ clk_disable_unprepare(sg->sata1_pclk);
+ clk_disable_unprepare(sg->sata0_pclk);
+ return PTR_ERR(sg->sata0_reset);
+ }
+ sg->sata1_reset = devm_reset_control_get_exclusive(dev, "sata1");
+ if (IS_ERR(sg->sata1_reset)) {
+ dev_err(dev, "no SATA1 reset controller\n");
+ clk_disable_unprepare(sg->sata1_pclk);
+ clk_disable_unprepare(sg->sata0_pclk);
+ return PTR_ERR(sg->sata1_reset);
+ }
+
+ sata_id = readl(sg->base + GEMINI_SATA_ID);
+ sata_phy_id = readl(sg->base + GEMINI_SATA_PHY_ID);
+ sg->sata_bridge = true;
+ clk_disable(sg->sata0_pclk);
+ clk_disable(sg->sata1_pclk);
+
+ dev_info(dev, "SATA ID %08x, PHY ID: %08x\n", sata_id, sata_phy_id);
+
+ return 0;
+}
+
+static int gemini_setup_ide_pins(struct device *dev)
+{
+ struct pinctrl *p;
+ struct pinctrl_state *ide_state;
+ int ret;
+
+ p = devm_pinctrl_get(dev);
+ if (IS_ERR(p))
+ return PTR_ERR(p);
+
+ ide_state = pinctrl_lookup_state(p, "ide");
+ if (IS_ERR(ide_state))
+ return PTR_ERR(ide_state);
+
+ ret = pinctrl_select_state(p, ide_state);
+ if (ret) {
+ dev_err(dev, "could not select IDE state\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int gemini_sata_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct sata_gemini *sg;
+ struct regmap *map;
+ struct resource *res;
+ enum gemini_muxmode muxmode;
+ u32 gmode;
+ u32 gmask;
+ int ret;
+
+ sg = devm_kzalloc(dev, sizeof(*sg), GFP_KERNEL);
+ if (!sg)
+ return -ENOMEM;
+ sg->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ sg->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(sg->base))
+ return PTR_ERR(sg->base);
+
+ map = syscon_regmap_lookup_by_phandle(np, "syscon");
+ if (IS_ERR(map)) {
+ dev_err(dev, "no global syscon\n");
+ return PTR_ERR(map);
+ }
+
+ /* Set up the SATA bridge if need be */
+ if (of_property_read_bool(np, "cortina,gemini-enable-sata-bridge")) {
+ ret = gemini_sata_bridge_init(sg);
+ if (ret)
+ return ret;
+ }
+
+ if (of_property_read_bool(np, "cortina,gemini-enable-ide-pins"))
+ sg->ide_pins = true;
+
+ if (!sg->sata_bridge && !sg->ide_pins) {
+ dev_err(dev, "neither SATA bridge or IDE output enabled\n");
+ ret = -EINVAL;
+ goto out_unprep_clk;
+ }
+
+ ret = of_property_read_u32(np, "cortina,gemini-ata-muxmode", &muxmode);
+ if (ret) {
+ dev_err(dev, "could not parse ATA muxmode\n");
+ goto out_unprep_clk;
+ }
+ if (muxmode > GEMINI_MUXMODE_3) {
+ dev_err(dev, "illegal muxmode %d\n", muxmode);
+ ret = -EINVAL;
+ goto out_unprep_clk;
+ }
+ sg->muxmode = muxmode;
+ gmask = GEMINI_IDE_IOMUX_MASK;
+ gmode = (muxmode << GEMINI_IDE_IOMUX_SHIFT);
+
+ ret = regmap_update_bits(map, GEMINI_GLOBAL_MISC_CTRL, gmask, gmode);
+ if (ret) {
+ dev_err(dev, "unable to set up IDE muxing\n");
+ ret = -ENODEV;
+ goto out_unprep_clk;
+ }
+
+ /*
+ * Route out the IDE pins if desired.
+ * This is done by looking up a special pin control state called
+ * "ide" that will route out the IDE pins.
+ */
+ if (sg->ide_pins) {
+ ret = gemini_setup_ide_pins(dev);
+ if (ret)
+ return ret;
+ }
+
+ dev_info(dev, "set up the Gemini IDE/SATA nexus\n");
+ platform_set_drvdata(pdev, sg);
+ sg_singleton = sg;
+
+ return 0;
+
+out_unprep_clk:
+ if (sg->sata_bridge) {
+ clk_unprepare(sg->sata1_pclk);
+ clk_unprepare(sg->sata0_pclk);
+ }
+ return ret;
+}
+
+static int gemini_sata_remove(struct platform_device *pdev)
+{
+ struct sata_gemini *sg = platform_get_drvdata(pdev);
+
+ if (sg->sata_bridge) {
+ clk_unprepare(sg->sata1_pclk);
+ clk_unprepare(sg->sata0_pclk);
+ }
+ sg_singleton = NULL;
+
+ return 0;
+}
+
+static const struct of_device_id gemini_sata_of_match[] = {
+ {
+ .compatible = "cortina,gemini-sata-bridge",
+ },
+ {},
+};
+
+static struct platform_driver gemini_sata_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = of_match_ptr(gemini_sata_of_match),
+ },
+ .probe = gemini_sata_probe,
+ .remove = gemini_sata_remove,
+};
+module_platform_driver(gemini_sata_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);