[PATCH 4/9] usb: phy: add the Berlin USB PHY driver
From: Antoine TÃnart
Date: Thu Jun 05 2014 - 11:51:58 EST
Add the driver driving the Marvell Berlin USB PHY. This allows to
initialize the PHY and to use it from the USB driver later.
Signed-off-by: Antoine TÃnart <antoine.tenart@xxxxxxxxxxxxxxxxxx>
---
drivers/usb/phy/Kconfig | 9 ++
drivers/usb/phy/Makefile | 1 +
drivers/usb/phy/phy-berlin-usb.c | 223 +++++++++++++++++++++++++++++++++++++++
3 files changed, 233 insertions(+)
create mode 100644 drivers/usb/phy/phy-berlin-usb.c
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 416e0c8cf6ff..8be8d4afc428 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -27,6 +27,15 @@ config AB8500_USB
This transceiver supports high and full speed devices plus,
in host mode, low speed.
+config BERLIN_USBPHY
+ tristate "Marvell Berlin USB Transceiver Driver"
+ depends on ARCH_BERLIN
+ select USB_PHY
+ help
+ Enable this to support the USB tranceiver on Marvell Berlin
+ SoCs.
+
+
config FSL_USB2_OTG
bool "Freescale USB OTG Transceiver Driver"
depends on USB_EHCI_FSL && USB_FSL_USB2 && USB_OTG_FSM && PM_RUNTIME
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index f8fa719a31b9..9253f59cf82a 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_USB_OTG_FSM) += phy-fsm-usb.o
# transceiver drivers, keep the list sorted
obj-$(CONFIG_AB8500_USB) += phy-ab8500-usb.o
+obj-$(CONFIG_BERLIN_USBPHY) += phy-berlin-usb.o
obj-$(CONFIG_FSL_USB2_OTG) += phy-fsl-usb.o
obj-$(CONFIG_ISP1301_OMAP) += phy-isp1301-omap.o
obj-$(CONFIG_MV_U3D_PHY) += phy-mv-u3d-usb.o
diff --git a/drivers/usb/phy/phy-berlin-usb.c b/drivers/usb/phy/phy-berlin-usb.c
new file mode 100644
index 000000000000..79416668a71b
--- /dev/null
+++ b/drivers/usb/phy/phy-berlin-usb.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright (C) 2014 Marvell Technology Group Ltd.
+ *
+ * Antoine TÃnart <antoine.tenart@xxxxxxxxxxxxxxxxxx>
+ * Jisheng Zhang <jszhang@xxxxxxxxxxx>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/usb/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#define USB_PHY_PLL 0x04
+#define USB_PHY_PLL_CONTROL 0x08
+#define USB_PHY_TX_CTRL0 0x10
+#define USB_PHY_TX_CTRL1 0x14
+#define USB_PHY_TX_CTRL2 0x18
+#define USB_PHY_RX_CTRL 0x20
+#define USB_PHY_ANALOG 0x34
+
+/* USB_PHY_PLL */
+#define CLK_REF_DIV(x) ((x) << 4)
+#define FEEDBACK_CLK_DIV(x) ((x) << 8)
+
+/* USB_PHY_PLL_CONTROL */
+#define CLK_STABLE (0x1 << 0)
+#define PLL_CTRL_PIN (0x1 << 1)
+#define PLL_CTRL_REG (0x1 << 2)
+#define PLL_ON (0x1 << 3)
+#define PHASE_OFF_TOL_125 (0x0 << 5)
+#define PHASE_OFF_TOL_250 (0x1 << 5)
+#define KVC0_CALIB (0x0 << 9)
+#define KVC0_REG_CTRL (0x1 << 9)
+#define KVC0_HIGH (0x0 << 10)
+#define KVC0_LOW (0x3 << 10)
+#define CLK_BLK_EN (0x1 << 13)
+
+/* USB_PHY_TX_CTRL0 */
+#define EXT_HS_RCAL_EN (0x1 << 3)
+#define EXT_FS_RCAL_EN (0x1 << 4)
+#define IMPCAL_VTH_DIV(x) ((x) << 5)
+#define EXT_RS_RCAL_DIV(x) ((x) << 8)
+#define EXT_FS_RCAL_DIV(x) ((x) << 12)
+
+/* USB_PHY_TX_CTRL1 */
+#define TX_VDD15_14 (0x0 << 4)
+#define TX_VDD15_15 (0x1 << 4)
+#define TX_VDD15_16 (0x2 << 4)
+#define TX_VDD15_17 (0x3 << 4)
+#define TX_VDD12_VDD (0x0 << 6)
+#define TX_VDD12_11 (0x1 << 6)
+#define TX_VDD12_12 (0x2 << 6)
+#define TX_VDD12_13 (0x3 << 6)
+#define LOW_VDD_EN (0x1 << 8)
+#define TX_OUT_AMP(x) ((x) << 9)
+
+/* USB_PHY_TX_CTRL2 */
+#define TX_CHAN_CTRL_REG(x) ((x) << 0)
+#define DRV_SLEWRATE(x) ((x) << 4)
+#define IMP_CAL_FS_HS_DLY_0 (0x0 << 6)
+#define IMP_CAL_FS_HS_DLY_1 (0x1 << 6)
+#define IMP_CAL_FS_HS_DLY_2 (0x2 << 6)
+#define IMP_CAL_FS_HS_DLY_3 (0x3 << 6)
+#define FS_DRV_EN_MASK(x) ((x) << 8)
+#define HS_DRV_EN_MASK(x) ((x) << 12)
+
+/* USB_PHY_RX_CTRL */
+#define PHASE_FREEZE_DLY_2_CL (0x0 << 0)
+#define PHASE_FREEZE_DLY_4_CL (0x1 << 0)
+#define ACK_LENGTH_8_CL (0x0 << 2)
+#define ACK_LENGTH_12_CL (0x1 << 2)
+#define ACK_LENGTH_16_CL (0x2 << 2)
+#define ACK_LENGTH_20_CL (0x3 << 2)
+#define SQ_LENGTH_3 (0x0 << 4)
+#define SQ_LENGTH_6 (0x1 << 4)
+#define SQ_LENGTH_9 (0x2 << 4)
+#define SQ_LENGTH_12 (0x3 << 4)
+#define DISCON_THRESHOLD_260 (0x0 << 6)
+#define DISCON_THRESHOLD_270 (0x1 << 6)
+#define DISCON_THRESHOLD_280 (0x2 << 6)
+#define DISCON_THRESHOLD_290 (0x3 << 6)
+#define SQ_THRESHOLD(x) ((x) << 8)
+#define LPF_COEF(x) ((x) << 12)
+#define INTPL_CUR_10 (0x0 << 14)
+#define INTPL_CUR_20 (0x1 << 14)
+#define INTPL_CUR_30 (0x2 << 14)
+#define INTPL_CUR_40 (0x3 << 14)
+
+/* USB_PHY_ANALOG */
+#define ANA_PWR_UP (0x1 << 1)
+#define ANA_PWR_DOWN (0x1 << 2)
+#define V2I_VCO_RATIO(x) ((x) << 7)
+#define R_ROTATE_90 (0x0 << 10)
+#define R_ROTATE_0 (0x1 << 10)
+#define MODE_TEST_EN (0x1 << 11)
+#define ANA_TEST_DC_CTRL(x) ((x) << 12)
+
+#define to_berlin_phy_priv(p) container_of((p), struct berlin_phy_priv, phy)
+
+struct berlin_phy_priv {
+ void __iomem *base;
+ struct usb_phy phy;
+ struct reset_control *rst_ctrl;
+ int pwr_gpio;
+};
+
+static int berlin_phy_init(struct usb_phy *phy)
+{
+ struct berlin_phy_priv *priv = to_berlin_phy_priv(phy);
+ int ret;
+
+ reset_control_reset(priv->rst_ctrl);
+
+ writel(CLK_REF_DIV(0xc) | FEEDBACK_CLK_DIV(0x54),
+ priv->base + USB_PHY_PLL);
+ writel(CLK_STABLE | PLL_CTRL_REG | PHASE_OFF_TOL_250 | KVC0_REG_CTRL |
+ CLK_BLK_EN, priv->base + USB_PHY_PLL_CONTROL);
+ writel(V2I_VCO_RATIO(0x5) | R_ROTATE_0 | ANA_TEST_DC_CTRL(0x5),
+ priv->base + USB_PHY_ANALOG);
+ writel(PHASE_FREEZE_DLY_4_CL | ACK_LENGTH_16_CL | SQ_LENGTH_12 |
+ DISCON_THRESHOLD_260 | SQ_THRESHOLD(0xa) | LPF_COEF(0x2) |
+ INTPL_CUR_30, priv->base + USB_PHY_RX_CTRL);
+
+ writel(TX_VDD12_13 | TX_OUT_AMP(0x3), priv->base + USB_PHY_TX_CTRL1);
+ writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4),
+ priv->base + USB_PHY_TX_CTRL0);
+
+ writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4) |
+ EXT_FS_RCAL_DIV(0x2), priv->base + USB_PHY_TX_CTRL0);
+
+ writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4),
+ priv->base + USB_PHY_TX_CTRL0);
+ writel(TX_CHAN_CTRL_REG(0xf) | DRV_SLEWRATE(0x3) | IMP_CAL_FS_HS_DLY_3 |
+ FS_DRV_EN_MASK(0xd), priv->base + USB_PHY_TX_CTRL2);
+
+ ret = gpio_direction_output(priv->pwr_gpio, 0);
+ if (ret)
+ return ret;
+
+ gpio_set_value(priv->pwr_gpio, 1);
+
+ return 0;
+}
+
+static void berlin_phy_shutdown(struct usb_phy *phy)
+{
+ struct berlin_phy_priv *priv = to_berlin_phy_priv(phy);
+
+ gpio_set_value(priv->pwr_gpio, 0);
+}
+
+static int berlin_phy_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct berlin_phy_priv *priv;
+ struct resource *res;
+ int ret, gpio;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ priv->rst_ctrl = devm_reset_control_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->rst_ctrl)) {
+ ret = PTR_ERR(priv->rst_ctrl);
+ dev_err(&pdev->dev, "cannot get reset controller: %d\n", ret);
+ return ret;
+ }
+
+ gpio = of_get_named_gpio(np, "power-gpio", 0);
+ if (!gpio_is_valid(gpio))
+ return gpio;
+
+ ret = gpio_request(gpio, "power-gpio");
+ if (ret) {
+ dev_err(&pdev->dev, "cannot request GPIO %d", gpio);
+ return ret;
+ }
+ priv->pwr_gpio = gpio;
+
+ priv->phy.io_priv = priv->base;
+ priv->phy.dev = &pdev->dev;
+ priv->phy.label = "phy-berlin-usb";
+ priv->phy.init = berlin_phy_init;
+ priv->phy.shutdown = berlin_phy_shutdown;
+ priv->phy.type = USB_PHY_TYPE_USB2;
+
+ platform_set_drvdata(pdev, priv);
+
+ return usb_add_phy_dev(&priv->phy);
+}
+
+static const struct of_device_id phy_berlin_sata_of_match[] = {
+ { .compatible = "marvell,berlin-usbphy" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, phy_berlin_sata_of_match);
+
+static struct platform_driver phy_berlin_usb_driver = {
+ .probe = berlin_phy_probe,
+ .driver = {
+ .name = "phy-berlin-usb",
+ .owner = THIS_MODULE,
+ .of_match_table = phy_berlin_sata_of_match,
+ },
+};
+module_platform_driver(phy_berlin_usb_driver);
+
+MODULE_AUTHOR("Antoine TÃnart <antoine.tenart@xxxxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Marvell Berlin USB PHY driver");
+MODULE_LICENSE("GPL");
--
1.9.1
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