--- /dev/null
+/*
+ * drivers/usb/host/ehci-orion.c
+ *
+ * Tzachi Perelstein <tzachi@marvell.com>
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mbus.h>
+#include <linux/clk.h>
+#include <linux/platform_data/usb-ehci-orion.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+
+#include "ehci.h"
+
+#define rdl(off) readl_relaxed(hcd->regs + (off))
+#define wrl(off, val) writel_relaxed((val), hcd->regs + (off))
+
+#define USB_CMD 0x140
+#define USB_CMD_RUN BIT(0)
+#define USB_CMD_RESET BIT(1)
+#define USB_MODE 0x1a8
+#define USB_MODE_MASK GENMASK(1, 0)
+#define USB_MODE_DEVICE 0x2
+#define USB_MODE_HOST 0x3
+#define USB_MODE_SDIS BIT(4)
+#define USB_CAUSE 0x310
+#define USB_MASK 0x314
+#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4))
+#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4))
+#define USB_IPG 0x360
+#define USB_PHY_PWR_CTRL 0x400
+#define USB_PHY_TX_CTRL 0x420
+#define USB_PHY_RX_CTRL 0x430
+#define USB_PHY_IVREF_CTRL 0x440
+#define USB_PHY_TST_GRP_CTRL 0x450
+
+#define DRIVER_DESC "EHCI orion driver"
+
+#define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
+
+struct orion_ehci_hcd {
+ struct clk *clk;
+ struct phy *phy;
+};
+
+static const char hcd_name[] = "ehci-orion";
+
+static struct hc_driver __read_mostly ehci_orion_hc_driver;
+
+/*
+ * Implement Orion USB controller specification guidelines
+ */
+static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
+{
+ /* The below GLs are according to the Orion Errata document */
+ /*
+ * Clear interrupt cause and mask
+ */
+ wrl(USB_CAUSE, 0);
+ wrl(USB_MASK, 0);
+
+ /*
+ * Reset controller
+ */
+ wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
+ while (rdl(USB_CMD) & USB_CMD_RESET);
+
+ /*
+ * GL# USB-10: Set IPG for non start of frame packets
+ * Bits[14:8]=0xc
+ */
+ wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
+
+ /*
+ * GL# USB-9: USB 2.0 Power Control
+ * BG_VSEL[7:6]=0x1
+ */
+ wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
+
+ /*
+ * GL# USB-1: USB PHY Tx Control - force calibration to '8'
+ * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
+ */
+ wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
+
+ /*
+ * GL# USB-3 GL# USB-9: USB PHY Rx Control
+ * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
+ * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
+ */
+ wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
+
+ /*
+ * GL# USB-3 GL# USB-9: USB PHY IVREF Control
+ * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
+ */
+ wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
+
+ /*
+ * GL# USB-3 GL# USB-9: USB PHY Test Group Control
+ * REG_FIFO_SQ_RST[15]=0
+ */
+ wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
+
+ /*
+ * Stop and reset controller
+ */
+ wrl(USB_CMD, rdl(USB_CMD) & ~USB_CMD_RUN);
+ wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
+ while (rdl(USB_CMD) & USB_CMD_RESET);
+
+ /*
+ * GL# USB-5 Streaming disable REG_USB_MODE[4]=1
+ * TBD: This need to be done after each reset!
+ * GL# USB-4 Setup USB Host mode
+ */
+ wrl(USB_MODE, USB_MODE_SDIS | USB_MODE_HOST);
+}
+
+static void
+ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
+ const struct mbus_dram_target_info *dram)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ wrl(USB_WINDOW_CTRL(i), 0);
+ wrl(USB_WINDOW_BASE(i), 0);
+ }
+
+ for (i = 0; i < dram->num_cs; i++) {
+ const struct mbus_dram_window *cs = dram->cs + i;
+
+ wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
+ (cs->mbus_attr << 8) |
+ (dram->mbus_dram_target_id << 4) | 1);
+ wrl(USB_WINDOW_BASE(i), cs->base);
+ }
+}
+
+static const struct ehci_driver_overrides orion_overrides __initconst = {
+ .extra_priv_size = sizeof(struct orion_ehci_hcd),
+};
+
+static int ehci_orion_drv_probe(struct platform_device *pdev)
+{
+ struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev);
+ const struct mbus_dram_target_info *dram;
+ struct resource *res;
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci;
+ void __iomem *regs;
+ int irq, err;
+ enum orion_ehci_phy_ver phy_version;
+ struct orion_ehci_hcd *priv;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_debug("Initializing Orion-SoC USB Host Controller\n");
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(&pdev->dev,
+ "Found HC with no IRQ. Check %s setup!\n",
+ dev_name(&pdev->dev));
+ err = -ENODEV;
+ goto err;
+ }
+
+ /*
+ * Right now device-tree probed devices don't get dma_mask
+ * set. Since shared usb code relies on it, set it here for
+ * now. Once we have dma capability bindings this can go away.
+ */
+ err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ goto err;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(regs)) {
+ err = PTR_ERR(regs);
+ goto err;
+ }
+
+ hcd = usb_create_hcd(&ehci_orion_hc_driver,
+ &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+ hcd->regs = regs;
+
+ ehci = hcd_to_ehci(hcd);
+ ehci->caps = hcd->regs + 0x100;
+ hcd->has_tt = 1;
+
+ priv = hcd_to_orion_priv(hcd);
+ /*
+ * Not all platforms can gate the clock, so it is not an error if
+ * the clock does not exists.
+ */
+ priv->clk = devm_clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(priv->clk))
+ clk_prepare_enable(priv->clk);
+
+ priv->phy = devm_phy_optional_get(&pdev->dev, "usb");
+ if (IS_ERR(priv->phy)) {
+ err = PTR_ERR(priv->phy);
+ goto err_phy_get;
+ } else {
+ err = phy_init(priv->phy);
+ if (err)
+ goto err_phy_init;
+
+ err = phy_power_on(priv->phy);
+ if (err)
+ goto err_phy_power_on;
+ }
+
+ /*
+ * (Re-)program MBUS remapping windows if we are asked to.
+ */
+ dram = mv_mbus_dram_info();
+ if (dram)
+ ehci_orion_conf_mbus_windows(hcd, dram);
+
+ /*
+ * setup Orion USB controller.
+ */
+ if (pdev->dev.of_node)
+ phy_version = EHCI_PHY_NA;
+ else
+ phy_version = pd->phy_version;
+
+ switch (phy_version) {
+ case EHCI_PHY_NA: /* dont change USB phy settings */
+ break;
+ case EHCI_PHY_ORION:
+ orion_usb_phy_v1_setup(hcd);
+ break;
+ case EHCI_PHY_DD:
+ case EHCI_PHY_KW:
+ default:
+ dev_warn(&pdev->dev, "USB phy version isn't supported.\n");
+ }
+
+ err = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (err)
+ goto err_add_hcd;
+
+ device_wakeup_enable(hcd->self.controller);
+ return 0;
+
+err_add_hcd:
+ if (!IS_ERR(priv->phy))
+ phy_power_off(priv->phy);
+err_phy_power_on:
+ if (!IS_ERR(priv->phy))
+ phy_exit(priv->phy);
+err_phy_init:
+err_phy_get:
+ if (!IS_ERR(priv->clk))
+ clk_disable_unprepare(priv->clk);
+ usb_put_hcd(hcd);
+err:
+ dev_err(&pdev->dev, "init %s fail, %d\n",
+ dev_name(&pdev->dev), err);
+
+ return err;
+}
+
+static int ehci_orion_drv_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct orion_ehci_hcd *priv = hcd_to_orion_priv(hcd);
+
+ usb_remove_hcd(hcd);
+
+ if (!IS_ERR(priv->phy)) {
+ phy_power_off(priv->phy);
+ phy_exit(priv->phy);
+ }
+
+ if (!IS_ERR(priv->clk))
+ clk_disable_unprepare(priv->clk);
+
+ usb_put_hcd(hcd);
+
+ return 0;
+}
+
+static const struct of_device_id ehci_orion_dt_ids[] = {
+ { .compatible = "marvell,orion-ehci", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
+
+static struct platform_driver ehci_orion_driver = {
+ .probe = ehci_orion_drv_probe,
+ .remove = ehci_orion_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = "orion-ehci",
+ .of_match_table = ehci_orion_dt_ids,
+ },
+};
+
+static int __init ehci_orion_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ehci_init_driver(&ehci_orion_hc_driver, &orion_overrides);
+ return platform_driver_register(&ehci_orion_driver);
+}
+module_init(ehci_orion_init);
+
+static void __exit ehci_orion_cleanup(void)
+{
+ platform_driver_unregister(&ehci_orion_driver);
+}
+module_exit(ehci_orion_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_ALIAS("platform:orion-ehci");
+MODULE_AUTHOR("Tzachi Perelstein");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff