Patchwork [U-Boot,4/5] OMAP5: USB: Add OMAP xHCI file and header

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Submitter Dan Murphy
Date Aug. 26, 2013, 1:54 p.m.
Message ID <1377525293-31508-5-git-send-email-dmurphy@ti.com>
Download mbox | patch
Permalink /patch/269892/
State Awaiting Upstream
Delegated to: Marek Vasut
Headers show

Comments

Dan Murphy - Aug. 26, 2013, 1:54 p.m.
Add the OMAP file for the xHCI Host controller
This code will initilialize the proper components within the
OMAP5 to enable the xHCI host controller.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
 arch/arm/include/asm/arch-omap5/xhci-omap.h |  124 ++++++++++
 drivers/usb/host/Makefile                   |    1 +
 drivers/usb/host/xhci-omap.c                |  326 +++++++++++++++++++++++++++
 3 files changed, 451 insertions(+)
 create mode 100644 arch/arm/include/asm/arch-omap5/xhci-omap.h
 create mode 100644 drivers/usb/host/xhci-omap.c

Patch

diff --git a/arch/arm/include/asm/arch-omap5/xhci-omap.h b/arch/arm/include/asm/arch-omap5/xhci-omap.h
new file mode 100644
index 0000000..b557a43
--- /dev/null
+++ b/arch/arm/include/asm/arch-omap5/xhci-omap.h
@@ -0,0 +1,124 @@ 
+/*
+ * (C) Copyright 2013
+ * Texas Instruments Inc, <www.ti.com>
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_XHCI_OMAP_H_
+#define _ASM_ARCH_XHCI_OMAP_H_
+
+#define OMAP_XHCI_BASE 0x4a030000
+#define OMAP_OCP1_SCP_BASE 0x4a084c00
+#define OMAP_OTG_WRAPPER_BASE 0x4A020000
+
+/* Phy register MACRO definitions */
+#define	PLL_REGM_MASK		0x001FFE00
+#define	PLL_REGM_SHIFT		0x9
+#define	PLL_REGM_F_MASK		0x0003FFFF
+#define	PLL_REGM_F_SHIFT	0x0
+#define	PLL_REGN_MASK		0x000001FE
+#define	PLL_REGN_SHIFT		0x1
+#define	PLL_SELFREQDCO_MASK	0x0000000E
+#define	PLL_SELFREQDCO_SHIFT	0x1
+#define	PLL_SD_MASK		0x0003FC00
+#define	PLL_SD_SHIFT		0x9
+#define	SET_PLL_GO		0x1
+#define	PLL_TICOPWDN		0x10000
+#define	PLL_LOCK		0x2
+#define	PLL_IDLE		0x1
+
+#define USB3_PWRCTL_CLK_CMD_MASK	0x3FE000
+#define USB3_PWRCTL_CLK_FREQ_MASK	0xFFC
+#define USB3_PHY_PARTIAL_RX_POWERON     (1 << 6)
+#define USB3_PHY_RX_POWERON		(1 << 14)
+#define USB3_PHY_TX_POWERON		(1 << 15)
+#define USB3_PHY_TX_RX_POWERON	(USB3_PHY_RX_POWERON | USB3_PHY_TX_POWERON)
+#define USB3_PWRCTL_CLK_CMD_SHIFT   14
+#define USB3_PWRCTL_CLK_FREQ_SHIFT	22
+
+/* USBOTGSS_WRAPPER definitions */
+#define USBOTGSS_WRAPRESET	(1 << 17)
+#define USBOTGSS_DMADISABLE (1 << 16)
+#define USBOTGSS_STANDBYMODE_NO_STANDBY (1 << 4)
+#define USBOTGSS_STANDBYMODE_SMRT		(1 << 5)
+#define USBOTGSS_STANDBYMODE_SMRT_WKUP (0x3 << 4)
+#define USBOTGSS_IDLEMODE_NOIDLE (1 << 2)
+#define USBOTGSS_IDLEMODE_SMRT (1 << 3)
+#define USBOTGSS_IDLEMODE_SMRT_WKUP (0x3 << 2)
+
+/* USBOTGSS_IRQENABLE_SET_0 bit */
+#define USBOTGSS_COREIRQ_EN	(1 << 0)
+
+/* USBOTGSS_IRQENABLE_SET_1 bits */
+#define USBOTGSS_IRQ_SET_1_IDPULLUP_FALL_EN	(1 << 0)
+#define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_FALL_EN	(1 << 3)
+#define USBOTGSS_IRQ_SET_1_CHRGVBUS_FALL_EN	(1 << 4)
+#define USBOTGSS_IRQ_SET_1_DRVVBUS_FALL_EN	(1 << 5)
+#define USBOTGSS_IRQ_SET_1_IDPULLUP_RISE_EN	(1 << 8)
+#define USBOTGSS_IRQ_SET_1_DISCHRGVBUS_RISE_EN	(1 << 11)
+#define USBOTGSS_IRQ_SET_1_CHRGVBUS_RISE_EN	(1 << 12)
+#define USBOTGSS_IRQ_SET_1_DRVVBUS_RISE_EN	(1 << 13)
+#define USBOTGSS_IRQ_SET_1_OEVT_EN	(1 << 16)
+#define USBOTGSS_IRQ_SET_1_DMADISABLECLR_EN	(1 << 17)
+
+/*
+ * USBOTGSS_WRAPPER registers
+ */
+struct omap_dwc_wrapper {
+	u32 revision;
+
+	u32 reserve_1[3];
+
+	u32 sysconfig; /* offset of 0x10 */
+
+	u32 reserve_2[3];
+	u16 reserve_3;
+
+	u32 irqstatus_raw_0; /* offset of 0x24 */
+	u32 irqstatus_0;
+	u32 irqenable_set_0;
+	u32 irqenable_clr_0;
+
+	u32 irqstatus_raw_1; /* offset of 0x34 */
+	u32 irqstatus_1;
+	u32 irqenable_set_1;
+	u32 irqenable_clr_1;
+
+	u32 reserve_4[15];
+
+	u32 utmi_otg_ctrl; /* offset of 0x80 */
+	u32 utmi_otg_status;
+
+	u32 reserve_5[30];
+
+	u32 mram_offset; /* offset of 0x100 */
+	u32 fladj;
+	u32 dbg_config;
+	u32 dbg_data;
+	u32 dev_ebc_en;
+};
+
+/* XHCI PHY register structure */
+struct omap_usb3_phy {
+	u32 reserve1;
+	u32 pll_status;
+	u32 pll_go;
+	u32 pll_config_1;
+	u32 pll_config_2;
+	u32 pll_config_3;
+	u32 pll_ssc_config_1;
+	u32 pll_ssc_config_2;
+	u32 pll_config_4;
+};
+
+struct omap_xhci {
+	struct omap_dwc_wrapper *otg_wrapper;
+	struct omap_usb3_phy *usb3_phy;
+	struct xhci_hccr *hcd;
+	struct dwc3 *dwc3_reg;
+};
+
+#endif /* _ASM_ARCH_XHCI_OMAP_H_ */
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index eb50bc1..328752c 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -45,6 +45,7 @@  COBJS-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o
 # xhci
 COBJS-$(CONFIG_USB_XHCI) += xhci.o xhci-mem.o xhci-ring.o
 COBJS-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
+COBJS-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/usb/host/xhci-omap.c b/drivers/usb/host/xhci-omap.c
new file mode 100644
index 0000000..f4e41fd
--- /dev/null
+++ b/drivers/usb/host/xhci-omap.c
@@ -0,0 +1,326 @@ 
+/*
+ * OMAP USB HOST xHCI Controller
+ *
+ * (C) Copyright 2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <asm-generic/errno.h>
+#include <asm/omap_common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/xhci-omap.h>
+
+#include <linux/compat.h>
+#include <linux/usb/dwc3.h>
+
+#include "xhci.h"
+
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct omap_xhci omap;
+
+struct usb_dpll_params {
+	u16	m;
+	u8	n;
+	u8	freq:3;
+	u8	sd;
+	u32	mf;
+};
+
+#define	NUM_USB_CLKS		6
+
+static struct usb_dpll_params omap_usb3_dpll_params[NUM_USB_CLKS] = {
+	{1250, 5, 4, 20, 0},		/* 12 MHz */
+	{3125, 20, 4, 20, 0},		/* 16.8 MHz */
+	{1172, 8, 4, 20, 65537},	/* 19.2 MHz */
+	{1250, 12, 4, 20, 0},		/* 26 MHz */
+	{3125, 47, 4, 20, 92843},	/* 38.4 MHz */
+	{1000, 7, 4, 10, 0},        /* 20 MHz */
+};
+
+static void omap_usb_dpll_relock(struct omap_usb3_phy *phy_regs)
+{
+	u32 val;
+
+	writel(SET_PLL_GO, &phy_regs->pll_go);
+	do {
+		val = readl(&phy_regs->pll_status);
+			if (val & PLL_LOCK)
+				break;
+	} while (1);
+}
+
+static void omap_usb_dpll_lock(struct omap_usb3_phy *phy_regs)
+{
+	u32 clk_index = get_sys_clk_index();
+	u32 val;
+
+	val = readl(&phy_regs->pll_config_1);
+	val &= ~PLL_REGN_MASK;
+	val |= omap_usb3_dpll_params[clk_index].n << PLL_REGN_SHIFT;
+	writel(val, &phy_regs->pll_config_1);
+
+	val = readl(&phy_regs->pll_config_2);
+	val &= ~PLL_SELFREQDCO_MASK;
+	val |= omap_usb3_dpll_params[clk_index].freq << PLL_SELFREQDCO_SHIFT;
+	writel(val, &phy_regs->pll_config_2);
+
+	val = readl(&phy_regs->pll_config_1);
+	val &= ~PLL_REGM_MASK;
+	val |= omap_usb3_dpll_params[clk_index].m << PLL_REGM_SHIFT;
+	writel(val, &phy_regs->pll_config_1);
+
+	val = readl(&phy_regs->pll_config_4);
+	val &= ~PLL_REGM_F_MASK;
+	val |= omap_usb3_dpll_params[clk_index].mf << PLL_REGM_F_SHIFT;
+	writel(val, &phy_regs->pll_config_4);
+
+	val = readl(&phy_regs->pll_config_3);
+	val &= ~PLL_SD_MASK;
+	val |= omap_usb3_dpll_params[clk_index].sd << PLL_SD_SHIFT;
+	writel(val, &phy_regs->pll_config_3);
+
+	omap_usb_dpll_relock(phy_regs);
+}
+
+static void usb3_phy_partial_powerup(struct omap_usb3_phy *phy_regs)
+{
+	u32 rate = get_sys_clk_freq()/1000000;
+	u32 val;
+
+	val = readl((*ctrl)->control_phy_power_usb);
+	val &= ~(USB3_PWRCTL_CLK_CMD_MASK | USB3_PWRCTL_CLK_FREQ_MASK);
+	val |= (USB3_PHY_PARTIAL_RX_POWERON | USB3_PHY_TX_RX_POWERON);
+	val |= rate << USB3_PWRCTL_CLK_FREQ_SHIFT;
+
+	writel(val, (*ctrl)->control_phy_power_usb);
+}
+
+static void usb3_phy_power(int on)
+{
+	u32 val;
+
+	val = readl((*ctrl)->control_phy_power_usb);
+	if (on) {
+		val &= ~USB3_PWRCTL_CLK_CMD_MASK;
+		val |= USB3_PHY_TX_RX_POWERON;
+	} else {
+		val &= (~USB3_PWRCTL_CLK_CMD_MASK & ~USB3_PHY_TX_RX_POWERON);
+	}
+
+	writel(val, (*ctrl)->control_phy_power_usb);
+}
+
+static void dwc_usb3_phy_init(struct omap_usb3_phy *phy_regs)
+{
+	omap_usb_dpll_lock(phy_regs);
+
+	usb3_phy_partial_powerup(phy_regs);
+	/*
+	 * Give enough time for the PHY to partially power-up before
+	 * powering it up completely. delay value suggested by the HW
+	 * team.
+	 */
+	mdelay(100);
+	usb3_phy_power(1);
+}
+
+static void omap_enable_phy_clocks(struct omap_xhci *omap)
+{
+	u32	val;
+
+	/* Setting OCP2SCP1 register */
+	setbits_le32((*prcm)->cm_l3init_ocp2scp1_clkctrl,
+		     OCP2SCP1_CLKCTRL_MODULEMODE_HW);
+
+	/* Turn on 32K AON clk */
+	setbits_le32((*prcm)->cm_coreaon_usb_phy_core_clkctrl,
+		     USBPHY_CORE_CLKCTRL_OPTFCLKEN_CLK32K);
+
+	/* Setting CM_L3INIT_CLKSTCTRL to 0x0 i.e NO sleep */
+	writel(0x0, (*prcm)->cm_l3init_clkstctrl);
+
+	val = (USBOTGSS_DMADISABLE |
+			USBOTGSS_STANDBYMODE_SMRT_WKUP |
+			USBOTGSS_IDLEMODE_NOIDLE);
+	writel(val, &omap->otg_wrapper->sysconfig);
+
+	/* Clear the utmi OTG status */
+	val = readl(&omap->otg_wrapper->utmi_otg_status);
+	writel(val, &omap->otg_wrapper->utmi_otg_status);
+
+	/* Enable interrupts */
+	writel(USBOTGSS_COREIRQ_EN, &omap->otg_wrapper->irqenable_set_0);
+	val = (USBOTGSS_IRQ_SET_1_IDPULLUP_FALL_EN |
+			USBOTGSS_IRQ_SET_1_DISCHRGVBUS_FALL_EN |
+			USBOTGSS_IRQ_SET_1_CHRGVBUS_FALL_EN	|
+			USBOTGSS_IRQ_SET_1_DRVVBUS_FALL_EN	|
+			USBOTGSS_IRQ_SET_1_IDPULLUP_RISE_EN	|
+			USBOTGSS_IRQ_SET_1_DISCHRGVBUS_RISE_EN	|
+			USBOTGSS_IRQ_SET_1_CHRGVBUS_RISE_EN |
+			USBOTGSS_IRQ_SET_1_DRVVBUS_RISE_EN |
+			USBOTGSS_IRQ_SET_1_OEVT_EN);
+	writel(val, &omap->otg_wrapper->irqenable_set_1);
+
+	/* Clear the IRQ status */
+	val = readl(&omap->otg_wrapper->irqstatus_1);
+	writel(val, &omap->otg_wrapper->irqstatus_1);
+	val = readl(&omap->otg_wrapper->irqstatus_0);
+	writel(val, &omap->otg_wrapper->irqstatus_0);
+
+	/* Enable the USB OTG Super speed clocks */
+	val = (OPTFCLKEN_REFCLK960M | OTG_SS_CLKCTRL_MODULEMODE_HW);
+	setbits_le32((*prcm)->cm_l3init_usb_otg_ss_clkctrl, val);
+
+};
+
+inline int __board_usb_init(void)
+{
+	return 0;
+}
+int board_usb_init(void) __attribute__((weak, alias("__board_usb_init")));
+
+static void dwc3_set_mode(struct dwc3 *dwc3_reg, u32 mode)
+{
+	clrsetbits_le32(&dwc3_reg->g_ctl,
+			DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG),
+			DWC3_GCTL_PRTCAPDIR(mode));
+}
+
+static void dwc3_core_soft_reset(struct dwc3 *dwc3_reg)
+{
+	/* Before Resetting PHY, put Core in Reset */
+	setbits_le32(&dwc3_reg->g_ctl, DWC3_GCTL_CORESOFTRESET);
+
+	/* Assert USB3 PHY reset */
+	setbits_le32(&dwc3_reg->g_usb3pipectl[0], DWC3_GUSB3PIPECTL_PHYSOFTRST);
+
+	/* Assert USB2 PHY reset */
+	setbits_le32(&dwc3_reg->g_usb2phycfg, DWC3_GUSB2PHYCFG_PHYSOFTRST);
+
+	mdelay(100);
+
+	/* Clear USB3 PHY reset */
+	clrbits_le32(&dwc3_reg->g_usb3pipectl[0], DWC3_GUSB3PIPECTL_PHYSOFTRST);
+
+	/* Clear USB2 PHY reset */
+	clrbits_le32(&dwc3_reg->g_usb2phycfg, DWC3_GUSB2PHYCFG_PHYSOFTRST);
+
+	/* After PHYs are stable we can take Core out of reset state */
+	clrbits_le32(&dwc3_reg->g_ctl, DWC3_GCTL_CORESOFTRESET);
+}
+
+static int dwc3_core_init(struct dwc3 *dwc3_reg)
+{
+	u32 reg;
+	u32 revision;
+	unsigned int dwc3_hwparams1;
+
+	revision = readl(&dwc3_reg->g_snpsid);
+	/* This should read as U3 followed by revision number */
+	if ((revision & DWC3_GSNPSID_MASK) != 0x55330000) {
+		puts("this is not a DesignWare USB3 DRD Core\n");
+		return -1;
+	}
+
+	dwc3_core_soft_reset(dwc3_reg);
+
+	dwc3_hwparams1 = readl(&dwc3_reg->g_hwparams1);
+
+	reg = readl(&dwc3_reg->g_ctl);
+	reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
+	reg &= ~DWC3_GCTL_DISSCRAMBLE;
+	switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc3_hwparams1)) {
+	case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
+		reg &= ~DWC3_GCTL_DSBLCLKGTNG;
+		break;
+	default:
+		debug("No power optimization available\n");
+	}
+
+	/*
+	 * WORKAROUND: DWC3 revisions <1.90a have a bug
+	 * where the device can fail to connect at SuperSpeed
+	 * and falls back to high-speed mode which causes
+	 * the device to enter a Connect/Disconnect loop
+	 */
+	if ((revision & DWC3_REVISION_MASK) < 0x190a)
+		reg |= DWC3_GCTL_U2RSTECN;
+
+	writel(reg, &dwc3_reg->g_ctl);
+
+	return 0;
+}
+
+static int omap_xhci_core_init(struct omap_xhci *omap)
+{
+	int ret = 0;
+
+	omap_enable_phy_clocks(omap);
+
+	dwc_usb3_phy_init(omap->usb3_phy);
+
+	ret = dwc3_core_init(omap->dwc3_reg);
+	if (ret) {
+		debug("%s:failed to initialize core\n", __func__);
+		return ret;
+	}
+
+	/* We are hard-coding DWC3 core to Host Mode */
+	dwc3_set_mode(omap->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
+
+	return ret;
+}
+
+static void omap_xhci_core_exit(struct omap_xhci *omap)
+{
+	usb3_phy_power(0);
+}
+
+int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
+{
+	struct omap_xhci *ctx = &omap;
+	int ret = 0;
+
+	ctx->hcd = (struct xhci_hccr *)OMAP_XHCI_BASE;
+	ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
+	ctx->usb3_phy = (struct omap_usb3_phy *)OMAP_OCP1_SCP_BASE;
+	ctx->otg_wrapper = (struct omap_dwc_wrapper *)OMAP_OTG_WRAPPER_BASE;
+
+	ret = board_usb_init();
+	if (ret != 0) {
+		puts("Failed to initialize board for USB\n");
+		return ret;
+	}
+
+	ret = omap_xhci_core_init(ctx);
+	if (ret < 0) {
+		puts("Failed to initialize xhci\n");
+		return ret;
+	}
+
+	*hccr = (struct xhci_hccr *)(OMAP_XHCI_BASE);
+	*hcor = (struct xhci_hcor *)((uint32_t) *hccr
+				+ HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+	debug("omap-xhci: init hccr %x and hcor %x hc_length %d\n",
+	      (uint32_t)*hccr, (uint32_t)*hcor,
+	      (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
+
+	return ret;
+}
+
+void xhci_hcd_stop(int index)
+{
+	struct omap_xhci *ctx = &omap;
+
+	omap_xhci_core_exit(ctx);
+}