[PATCH v2 1/5] drivers: usb: chipidea: Add qoriq platform driver
From: Rajesh Bhagat
Date: Sat Jul 09 2016 - 00:46:53 EST
Adds qoriq platform driver for chipidea controller,
verfied on LS1021A and LS1012A platforms.
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@xxxxxxx>
---
Changes in v2:
- Replaced Freescale with QorIQ in comments section
- Added macros to remove hardcoding while programming registers
- Changed the compatible string to fsl,ci-qoriq-usb2 and added version
- Removed calls to devm free/release calls
drivers/usb/chipidea/Makefile | 2 +
drivers/usb/chipidea/ci_hdrc_qoriq.c | 237 +++++++++++++++++++++++++++++++++++
drivers/usb/chipidea/ci_hdrc_qoriq.h | 65 ++++++++++
3 files changed, 304 insertions(+)
create mode 100644 drivers/usb/chipidea/ci_hdrc_qoriq.c
create mode 100644 drivers/usb/chipidea/ci_hdrc_qoriq.h
diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index 518e445..3122b86b 100644
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -14,3 +14,5 @@ obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc_zevio.o
obj-$(CONFIG_USB_CHIPIDEA_PCI) += ci_hdrc_pci.o
obj-$(CONFIG_USB_CHIPIDEA_OF) += usbmisc_imx.o ci_hdrc_imx.o
+
+obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc_qoriq.o
diff --git a/drivers/usb/chipidea/ci_hdrc_qoriq.c b/drivers/usb/chipidea/ci_hdrc_qoriq.c
new file mode 100644
index 0000000..3f478c6
--- /dev/null
+++ b/drivers/usb/chipidea/ci_hdrc_qoriq.c
@@ -0,0 +1,237 @@
+/*
+ * QorIQ SoC USB 2.0 Controller driver
+ *
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ * Author: Rajesh Bhagat <rajesh.bhagat@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/dma-mapping.h>
+#include <linux/usb/of.h>
+#include <linux/usb/chipidea.h>
+#include <linux/clk.h>
+
+#include "ci.h"
+#include "ci_hdrc_qoriq.h"
+
+struct ci_hdrc_qoriq_data {
+ struct phy *phy;
+ struct clk *clk;
+ void __iomem *qoriq_regs;
+ struct platform_device *ci_pdev;
+ enum usb_phy_interface phy_mode;
+};
+
+/*
+ * clock helper functions
+ */
+static int ci_hdrc_qoriq_get_clks(struct platform_device *pdev)
+{
+ int ret;
+ struct device *dev = &pdev->dev;
+ struct ci_hdrc_qoriq_data *data = platform_get_drvdata(pdev);
+
+ data->clk = devm_clk_get(dev, "usb2-clock");
+ if (IS_ERR(data->clk)) {
+ dev_err(dev, "failed to get clk, err=%ld\n",
+ PTR_ERR(data->clk));
+ return ret;
+ }
+ return 0;
+}
+
+static int ci_hdrc_qoriq_prepare_enable_clks(struct platform_device *pdev)
+{
+ int ret;
+ struct device *dev = &pdev->dev;
+ struct ci_hdrc_qoriq_data *data = platform_get_drvdata(pdev);
+
+ ret = clk_prepare_enable(data->clk);
+ if (ret) {
+ dev_err(dev, "failed to prepare/enable clk, err=%d\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
+static void ci_hdrc_qoriq_disable_unprepare_clks(struct platform_device *pdev)
+{
+ struct ci_hdrc_qoriq_data *data = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(data->clk);
+}
+
+static int ci_hdrc_qoriq_usb_setup(struct platform_device *pdev)
+{
+ u32 reg;
+ struct resource *res;
+ struct device *dev = &pdev->dev;
+ struct ci_hdrc_qoriq_data *data = platform_get_drvdata(pdev);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "failed to get I/O memory\n");
+ return -ENOENT;
+ }
+
+ dev_dbg(dev, "res->start %llx, resource_size(res) %llx\n", res->start,
+ resource_size(res));
+ data->qoriq_regs = devm_ioremap(dev, res->start, resource_size(res));
+ if (IS_ERR(data->qoriq_regs)) {
+ dev_err(dev, "failed to remap I/O memory\n");
+ return -ENOMEM;
+ }
+
+ data->phy_mode = of_usb_get_phy_mode(pdev->dev.of_node);
+ dev_dbg(dev, "phy_mode %d\n", data->phy_mode);
+
+ reg = ioread32be(data->qoriq_regs + QORIQ_SOC_USB_CTRL);
+ switch (data->phy_mode) {
+ case USBPHY_INTERFACE_MODE_ULPI:
+ iowrite32be(reg | ~UTMI_PHY_EN,
+ data->qoriq_regs + QORIQ_SOC_USB_CTRL);
+ reg = ioread32be(data->qoriq_regs + QORIQ_SOC_USB_CTRL);
+ iowrite32be(reg | USB_CTRL_USB_EN,
+ data->qoriq_regs + QORIQ_SOC_USB_CTRL);
+ break;
+ default:
+ dev_err(dev, "unsupported phy_mode %d\n", data->phy_mode);
+ return -EINVAL;
+ }
+
+ /* Setup Snooping for all the 4GB space */
+ /* SNOOP1 starts from 0x0, size 2G */
+ iowrite32be(SNOOP_SIZE_2GB, data->qoriq_regs + QORIQ_SOC_USB_SNOOP1);
+ /* SNOOP2 starts from 0x80000000, size 2G */
+ iowrite32be(SNOOP_SIZE_2GB | 0x80000000,
+ data->qoriq_regs + QORIQ_SOC_USB_SNOOP2);
+
+ iowrite32be(PRICTRL_PRI_LVL, data->qoriq_regs + QORIQ_SOC_USB_PRICTRL);
+ iowrite32be(AGECNTTHRSH_THRESHOLD, data->qoriq_regs +
+ QORIQ_SOC_USB_AGECNTTHRSH);
+ iowrite32be(SICTRL_RD_PREFETCH_32_BYTE, data->qoriq_regs +
+ QORIQ_SOC_USB_SICTRL);
+
+ devm_iounmap(dev, data->qoriq_regs);
+ return 0;
+}
+
+static int ci_hdrc_qoriq_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct device *dev = &pdev->dev;
+ struct ci_hdrc_qoriq_data *data;
+ struct ci_hdrc_platform_data pdata = {
+ .name = dev_name(dev),
+ .capoffset = DEF_CAPOFFSET,
+ .flags = CI_HDRC_DISABLE_STREAMING,
+ };
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, data);
+
+ ret = ci_hdrc_qoriq_get_clks(pdev);
+ if (ret)
+ goto err_out;
+
+ ret = ci_hdrc_qoriq_prepare_enable_clks(pdev);
+ if (ret)
+ goto err_out;
+
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(dev, "failed to set coherent dma mask, err=%d\n", ret);
+ goto err_clks;
+ }
+
+ ret = ci_hdrc_qoriq_usb_setup(pdev);
+ if (ret) {
+ dev_err(dev, "failed to perform qoriq_usb2 setup, err=%d\n",
+ ret);
+ goto err_clks;
+ }
+
+ data->phy = devm_phy_get(dev, "usb2-phy");
+ if (IS_ERR(data->phy)) {
+ ret = PTR_ERR(data->phy);
+ /* Return -EINVAL if no usbphy is available */
+ if (ret == -ENODEV)
+ ret = -EINVAL;
+ dev_err(dev, "failed get phy device, err=%d\n", ret);
+ goto err_clks;
+ }
+ pdata.phy = data->phy;
+
+ data->ci_pdev = ci_hdrc_add_device(dev,
+ pdev->resource, pdev->num_resources,
+ &pdata);
+ if (IS_ERR(data->ci_pdev)) {
+ ret = PTR_ERR(data->ci_pdev);
+ dev_err(dev,
+ "failed to register ci_hdrc platform device, err=%d\n",
+ ret);
+ goto err_clks;
+ }
+
+ pm_runtime_no_callbacks(dev);
+ pm_runtime_enable(dev);
+
+ dev_dbg(dev, "initialized\n");
+ return 0;
+
+err_clks:
+ ci_hdrc_qoriq_disable_unprepare_clks(pdev);
+err_out:
+ return ret;
+}
+
+static int ci_hdrc_qoriq_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ci_hdrc_qoriq_data *data = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(dev);
+ ci_hdrc_remove_device(data->ci_pdev);
+ ci_hdrc_qoriq_disable_unprepare_clks(pdev);
+ dev_dbg(dev, "de-initialized\n");
+ return 0;
+}
+
+static void ci_hdrc_qoriq_shutdown(struct platform_device *pdev)
+{
+ ci_hdrc_qoriq_remove(pdev);
+}
+
+static const struct of_device_id ci_hdrc_qoriq_dt_ids[] = {
+ { .compatible = "fsl,ci-qoriq-usb2"},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ci_hdrc_qoriq_dt_ids);
+
+static struct platform_driver ci_hdrc_qoriq_driver = {
+ .probe = ci_hdrc_qoriq_probe,
+ .remove = ci_hdrc_qoriq_remove,
+ .shutdown = ci_hdrc_qoriq_shutdown,
+ .driver = {
+ .name = "ci_qoriq_usb2",
+ .of_match_table = ci_hdrc_qoriq_dt_ids,
+ },
+};
+
+module_platform_driver(ci_hdrc_qoriq_driver);
+
+MODULE_ALIAS("platform:ci-qoriq-usb2");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("CI HDRC QORIQ USB binding");
+MODULE_AUTHOR("Rajesh Bhagat <rajesh.bhagat@xxxxxxx>");
diff --git a/drivers/usb/chipidea/ci_hdrc_qoriq.h b/drivers/usb/chipidea/ci_hdrc_qoriq.h
new file mode 100644
index 0000000..afd29442
--- /dev/null
+++ b/drivers/usb/chipidea/ci_hdrc_qoriq.h
@@ -0,0 +1,65 @@
+/*
+ * QorIQ SoC USB 2.0 Controller driver
+ *
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ * Author: Rajesh Bhagat <rajesh.bhagat@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef __DRIVER_USB_CHIPIDEA_CI_HDRC_QORIQ_H
+#define __DRIVER_USB_CHIPIDEA_CI_HDRC_QORIQ_H
+
+/* offsets for the non-ehci registers in the QORIQ SOC USB controller */
+#define QORIQ_SOC_USB_SBUSCFG 0x90
+#define SBUSCFG_INCR8 0x02 /* INCR8, specified */
+#define QORIQ_SOC_USB_ULPIVP 0x170
+#define QORIQ_SOC_USB_PORTSC1 0x184
+#define PORT_PTS_MSK (3<<30)
+#define PORT_PTS_UTMI (0<<30)
+#define PORT_PTS_ULPI (2<<30)
+#define PORT_PTS_SERIAL (3<<30)
+#define PORT_PTS_PTW (1<<28)
+#define QORIQ_SOC_USB_PORTSC2 0x188
+#define QORIQ_SOC_USB_USBMODE 0x1a8
+#define USBMODE_CM_MASK (3 << 0) /* controller mode mask */
+#define USBMODE_CM_HOST (3 << 0) /* controller mode: host */
+#define USBMODE_ES (1 << 2) /* (Big) Endian Select */
+
+#define QORIQ_SOC_USB_USBGENCTRL 0x200
+#define USBGENCTRL_PPP (1 << 3)
+#define USBGENCTRL_PFP (1 << 2)
+#define QORIQ_SOC_USB_ISIPHYCTRL 0x204
+#define ISIPHYCTRL_PXE (1)
+#define ISIPHYCTRL_PHYE (1 << 4)
+
+#define QORIQ_SOC_USB_SNOOP1 0x400 /* NOTE: big-endian */
+#define QORIQ_SOC_USB_SNOOP2 0x404 /* NOTE: big-endian */
+#define QORIQ_SOC_USB_AGECNTTHRSH 0x408 /* NOTE: big-endian */
+#define AGECNTTHRSH_THRESHOLD 0x40
+#define QORIQ_SOC_USB_PRICTRL 0x40c /* NOTE: big-endian */
+#define PRICTRL_PRI_LVL 0xc
+#define QORIQ_SOC_USB_SICTRL 0x410 /* NOTE: big-endian */
+#define SICTRL_RD_PREFETCH_32_BYTE (0x1)
+#define SICTRL_RD_PREFETCH_64_BYTE (0x0)
+#define QORIQ_SOC_USB_CTRL 0x500 /* NOTE: big-endian */
+#define CTRL_UTMI_PHY_EN (1 << 9)
+#define CTRL_PHY_CLK_VALID (1 << 17)
+#define SNOOP_SIZE_2GB 0x1e
+
+/* control Register Bit Masks */
+#define CONTROL_REGISTER_W1C_MASK 0x00020000 /* W1C: PHY_CLK_VALID */
+#define ULPI_INT_EN (1<<0)
+#define WU_INT_EN (1<<1)
+#define USB_CTRL_USB_EN (1<<2)
+#define LINE_STATE_FILTER__EN (1<<3)
+#define KEEP_OTG_ON (1<<4)
+#define OTG_PORT (1<<5)
+#define PLL_RESET (1<<8)
+#define UTMI_PHY_EN (1<<9)
+#define ULPI_PHY_CLK_SEL (1<<10)
+#define PHY_CLK_VALID (1<<17)
+
+#endif /* __DRIVER_USB_CHIPIDEA_CI_HDRC_QORIQ_H */
--
2.6.2.198.g614a2ac