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path: root/drivers/mfd/omap-usb-tll.c
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Diffstat (limited to 'drivers/mfd/omap-usb-tll.c')
-rw-r--r--drivers/mfd/omap-usb-tll.c472
1 files changed, 472 insertions, 0 deletions
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
new file mode 100644
index 000000000..080d7970a
--- /dev/null
+++ b/drivers/mfd/omap-usb-tll.c
@@ -0,0 +1,472 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
+ *
+ * Copyright (C) 2012-2013 Texas Instruments Incorporated - https://www.ti.com
+ * Author: Keshava Munegowda <keshava_mgowda@ti.com>
+ * Author: Roger Quadros <rogerq@ti.com>
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_data/usb-omap.h>
+#include <linux/of.h>
+
+#include "omap-usb.h"
+
+#define USBTLL_DRIVER_NAME "usbhs_tll"
+
+/* TLL Register Set */
+#define OMAP_USBTLL_REVISION (0x00)
+#define OMAP_USBTLL_SYSCONFIG (0x10)
+#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
+#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
+#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
+#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
+#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
+
+#define OMAP_USBTLL_SYSSTATUS (0x14)
+#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
+
+#define OMAP_USBTLL_IRQSTATUS (0x18)
+#define OMAP_USBTLL_IRQENABLE (0x1C)
+
+#define OMAP_TLL_SHARED_CONF (0x30)
+#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
+#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
+#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
+#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
+#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
+
+#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
+#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
+#define OMAP_TLL_CHANNEL_CONF_DRVVBUS (1 << 16)
+#define OMAP_TLL_CHANNEL_CONF_CHRGVBUS (1 << 15)
+#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
+#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
+#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
+#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
+#define OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI (2 << 1)
+#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
+#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
+
+#define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0
+#define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1
+#define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2
+#define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3
+#define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4
+#define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5
+#define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6
+#define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7
+#define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA
+#define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB
+
+#define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
+#define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
+#define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
+#define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
+#define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
+
+#define OMAP_REV2_TLL_CHANNEL_COUNT 2
+#define OMAP_TLL_CHANNEL_COUNT 3
+#define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0)
+#define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1)
+#define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2)
+
+/* Values of USBTLL_REVISION - Note: these are not given in the TRM */
+#define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
+#define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */
+#define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */
+#define OMAP_USBTLL_REV4 0x00000006 /* OMAP5 */
+
+#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
+
+/* only PHY and UNUSED modes don't need TLL */
+#define omap_usb_mode_needs_tll(x) ((x) != OMAP_USBHS_PORT_MODE_UNUSED &&\
+ (x) != OMAP_EHCI_PORT_MODE_PHY)
+
+struct usbtll_omap {
+ void __iomem *base;
+ int nch; /* num. of channels */
+ struct clk *ch_clk[]; /* must be the last member */
+};
+
+/*-------------------------------------------------------------------------*/
+
+static const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
+static struct device *tll_dev;
+static DEFINE_SPINLOCK(tll_lock); /* serialize access to tll_dev */
+
+/*-------------------------------------------------------------------------*/
+
+static inline void usbtll_write(void __iomem *base, u32 reg, u32 val)
+{
+ writel_relaxed(val, base + reg);
+}
+
+static inline u32 usbtll_read(void __iomem *base, u32 reg)
+{
+ return readl_relaxed(base + reg);
+}
+
+static inline void usbtll_writeb(void __iomem *base, u32 reg, u8 val)
+{
+ writeb_relaxed(val, base + reg);
+}
+
+static inline u8 usbtll_readb(void __iomem *base, u32 reg)
+{
+ return readb_relaxed(base + reg);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
+{
+ switch (pmode) {
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+/*
+ * convert the port-mode enum to a value we can use in the FSLSMODE
+ * field of USBTLL_CHANNEL_CONF
+ */
+static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
+{
+ switch (mode) {
+ case OMAP_USBHS_PORT_MODE_UNUSED:
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
+
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM;
+
+ case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_3PIN_PHY;
+
+ case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_4PIN_PHY;
+
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0;
+
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM;
+
+ case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_3PIN_TLL;
+
+ case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_4PIN_TLL;
+
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0;
+
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM;
+ default:
+ pr_warn("Invalid port mode, using default\n");
+ return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
+ }
+}
+
+/**
+ * usbtll_omap_probe - initialize TI-based HCDs
+ *
+ * Allocates basic resources for this USB host controller.
+ *
+ * @pdev: Pointer to this device's platform device structure
+ */
+static int usbtll_omap_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct usbtll_omap *tll;
+ void __iomem *base;
+ int i, nch, ver;
+
+ dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+
+ ver = usbtll_read(base, OMAP_USBTLL_REVISION);
+ switch (ver) {
+ case OMAP_USBTLL_REV1:
+ case OMAP_USBTLL_REV4:
+ nch = OMAP_TLL_CHANNEL_COUNT;
+ break;
+ case OMAP_USBTLL_REV2:
+ case OMAP_USBTLL_REV3:
+ nch = OMAP_REV2_TLL_CHANNEL_COUNT;
+ break;
+ default:
+ nch = OMAP_TLL_CHANNEL_COUNT;
+ dev_dbg(dev, "rev 0x%x not recognized, assuming %d channels\n",
+ ver, nch);
+ break;
+ }
+
+ tll = devm_kzalloc(dev, sizeof(*tll) + sizeof(tll->ch_clk[nch]),
+ GFP_KERNEL);
+ if (!tll) {
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+ return -ENOMEM;
+ }
+
+ tll->base = base;
+ tll->nch = nch;
+ platform_set_drvdata(pdev, tll);
+
+ for (i = 0; i < nch; i++) {
+ char clkname[] = "usb_tll_hs_usb_chx_clk";
+
+ snprintf(clkname, sizeof(clkname),
+ "usb_tll_hs_usb_ch%d_clk", i);
+ tll->ch_clk[i] = clk_get(dev, clkname);
+
+ if (IS_ERR(tll->ch_clk[i]))
+ dev_dbg(dev, "can't get clock : %s\n", clkname);
+ else
+ clk_prepare(tll->ch_clk[i]);
+ }
+
+ pm_runtime_put_sync(dev);
+ /* only after this can omap_tll_enable/disable work */
+ spin_lock(&tll_lock);
+ tll_dev = dev;
+ spin_unlock(&tll_lock);
+
+ return 0;
+}
+
+/**
+ * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
+ * @pdev: USB Host Controller being removed
+ *
+ * Reverses the effect of usbtll_omap_probe().
+ */
+static int usbtll_omap_remove(struct platform_device *pdev)
+{
+ struct usbtll_omap *tll = platform_get_drvdata(pdev);
+ int i;
+
+ spin_lock(&tll_lock);
+ tll_dev = NULL;
+ spin_unlock(&tll_lock);
+
+ for (i = 0; i < tll->nch; i++) {
+ if (!IS_ERR(tll->ch_clk[i])) {
+ clk_unprepare(tll->ch_clk[i]);
+ clk_put(tll->ch_clk[i]);
+ }
+ }
+
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+}
+
+static const struct of_device_id usbtll_omap_dt_ids[] = {
+ { .compatible = "ti,usbhs-tll" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, usbtll_omap_dt_ids);
+
+static struct platform_driver usbtll_omap_driver = {
+ .driver = {
+ .name = usbtll_driver_name,
+ .of_match_table = usbtll_omap_dt_ids,
+ },
+ .probe = usbtll_omap_probe,
+ .remove = usbtll_omap_remove,
+};
+
+int omap_tll_init(struct usbhs_omap_platform_data *pdata)
+{
+ int i;
+ bool needs_tll;
+ unsigned reg;
+ struct usbtll_omap *tll;
+
+ if (!tll_dev)
+ return -ENODEV;
+
+ pm_runtime_get_sync(tll_dev);
+
+ spin_lock(&tll_lock);
+ tll = dev_get_drvdata(tll_dev);
+ needs_tll = false;
+ for (i = 0; i < tll->nch; i++)
+ needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]);
+
+ if (needs_tll) {
+ void __iomem *base = tll->base;
+
+ /* Program Common TLL register */
+ reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
+ reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
+ | OMAP_TLL_SHARED_CONF_USB_DIVRATION);
+ reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
+ reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
+
+ usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
+
+ /* Enable channels now */
+ for (i = 0; i < tll->nch; i++) {
+ reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
+
+ if (is_ohci_port(pdata->port_mode[i])) {
+ reg |= ohci_omap3_fslsmode(pdata->port_mode[i])
+ << OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
+ reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
+ } else if (pdata->port_mode[i] ==
+ OMAP_EHCI_PORT_MODE_TLL) {
+ /*
+ * Disable UTMI AutoIdle, BitStuffing
+ * and use SDR Mode. Enable ULPI AutoIdle.
+ */
+ reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
+ | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
+ reg |= OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF;
+ reg |= OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE;
+ } else if (pdata->port_mode[i] ==
+ OMAP_EHCI_PORT_MODE_HSIC) {
+ /*
+ * HSIC Mode requires UTMI port configurations
+ */
+ reg |= OMAP_TLL_CHANNEL_CONF_DRVVBUS
+ | OMAP_TLL_CHANNEL_CONF_CHRGVBUS
+ | OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI
+ | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF;
+ } else {
+ continue;
+ }
+ reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
+ usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg);
+
+ usbtll_writeb(base,
+ OMAP_TLL_ULPI_SCRATCH_REGISTER(i),
+ 0xbe);
+ }
+ }
+
+ spin_unlock(&tll_lock);
+ pm_runtime_put_sync(tll_dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_tll_init);
+
+int omap_tll_enable(struct usbhs_omap_platform_data *pdata)
+{
+ int i;
+ struct usbtll_omap *tll;
+
+ if (!tll_dev)
+ return -ENODEV;
+
+ pm_runtime_get_sync(tll_dev);
+
+ spin_lock(&tll_lock);
+ tll = dev_get_drvdata(tll_dev);
+
+ for (i = 0; i < tll->nch; i++) {
+ if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
+ int r;
+
+ if (IS_ERR(tll->ch_clk[i]))
+ continue;
+
+ r = clk_enable(tll->ch_clk[i]);
+ if (r) {
+ dev_err(tll_dev,
+ "Error enabling ch %d clock: %d\n", i, r);
+ }
+ }
+ }
+
+ spin_unlock(&tll_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_tll_enable);
+
+int omap_tll_disable(struct usbhs_omap_platform_data *pdata)
+{
+ int i;
+ struct usbtll_omap *tll;
+
+ if (!tll_dev)
+ return -ENODEV;
+
+ spin_lock(&tll_lock);
+ tll = dev_get_drvdata(tll_dev);
+
+ for (i = 0; i < tll->nch; i++) {
+ if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
+ if (!IS_ERR(tll->ch_clk[i]))
+ clk_disable(tll->ch_clk[i]);
+ }
+ }
+
+ spin_unlock(&tll_lock);
+ pm_runtime_put_sync(tll_dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_tll_disable);
+
+MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
+MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
+
+static int __init omap_usbtll_drvinit(void)
+{
+ return platform_driver_register(&usbtll_omap_driver);
+}
+
+/*
+ * init before usbhs core driver;
+ * The usbtll driver should be initialized before
+ * the usbhs core driver probe function is called.
+ */
+fs_initcall(omap_usbtll_drvinit);
+
+static void __exit omap_usbtll_drvexit(void)
+{
+ platform_driver_unregister(&usbtll_omap_driver);
+}
+module_exit(omap_usbtll_drvexit);
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