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authorSanchayan Maity <maitysanchayan@gmail.com>2015-04-15 16:24:27 +0530
committerTom Rini <trini@konsulko.com>2015-04-23 14:56:09 -0400
commita94bb7a42c0c377bd4eecc8aec1ef454c9bad51a (patch)
treed0fdf4c96cf7056ae926ec46b56921ed42dd57ea /drivers/usb
parente7b860fa4dd4de736d887deca19ca540abea4239 (diff)
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usb: host: Add ehci-vf USB driver for ARM Vybrid SoC's
This driver adds support for the USB peripheral on Freescale Vybrid SoC's. Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/Makefile1
-rw-r--r--drivers/usb/host/ehci-vf.c164
2 files changed, 165 insertions, 0 deletions
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 7658f87..3b57e56 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_USB_EHCI_SUNXI) += ehci-sunxi.o
obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o
obj-$(CONFIG_USB_EHCI_UNIPHIER) += ehci-uniphier.o
obj-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o
+obj-$(CONFIG_USB_EHCI_VF) += ehci-vf.o
obj-$(CONFIG_USB_EHCI_RMOBILE) += ehci-rmobile.o
obj-$(CONFIG_USB_EHCI_ZYNQ) += ehci-zynq.o
diff --git a/drivers/usb/host/ehci-vf.c b/drivers/usb/host/ehci-vf.c
new file mode 100644
index 0000000..5454855
--- /dev/null
+++ b/drivers/usb/host/ehci-vf.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2015 Sanchayan Maity <sanchayan.maity@toradex.com>
+ * Copyright (C) 2015 Toradex AG
+ *
+ * Based on ehci-mx6 driver
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <errno.h>
+#include <linux/compiler.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/regs-usbphy.h>
+#include <usb/ehci-fsl.h>
+
+#include "ehci.h"
+
+#define USB_NC_REG_OFFSET 0x00000800
+
+#define ANADIG_PLL_CTRL_EN_USB_CLKS (1 << 6)
+
+#define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */
+#define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */
+
+/* USBCMD */
+#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */
+#define UCMD_RESET (1 << 1) /* controller reset */
+
+static const unsigned phy_bases[] = {
+ USB_PHY0_BASE_ADDR,
+ USB_PHY1_BASE_ADDR,
+};
+
+static const unsigned nc_reg_bases[] = {
+ USBC0_BASE_ADDR,
+ USBC1_BASE_ADDR,
+};
+
+static void usb_internal_phy_clock_gate(int index)
+{
+ void __iomem *phy_reg;
+
+ phy_reg = (void __iomem *)phy_bases[index];
+ clrbits_le32(phy_reg + USBPHY_CTRL, USBPHY_CTRL_CLKGATE);
+}
+
+static void usb_power_config(int index)
+{
+ struct anadig_reg __iomem *anadig =
+ (struct anadig_reg __iomem *)ANADIG_BASE_ADDR;
+ void __iomem *pll_ctrl;
+
+ switch (index) {
+ case 0:
+ pll_ctrl = &anadig->pll3_ctrl;
+ clrbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_BYPASS);
+ setbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_ENABLE
+ | ANADIG_PLL3_CTRL_POWERDOWN
+ | ANADIG_PLL_CTRL_EN_USB_CLKS);
+ break;
+ case 1:
+ pll_ctrl = &anadig->pll7_ctrl;
+ clrbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_BYPASS);
+ setbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_ENABLE
+ | ANADIG_PLL7_CTRL_POWERDOWN
+ | ANADIG_PLL_CTRL_EN_USB_CLKS);
+ break;
+ default:
+ return;
+ }
+}
+
+static void usb_phy_enable(int index, struct usb_ehci *ehci)
+{
+ void __iomem *phy_reg;
+ void __iomem *phy_ctrl;
+ void __iomem *usb_cmd;
+
+ phy_reg = (void __iomem *)phy_bases[index];
+ phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL);
+ usb_cmd = (void __iomem *)&ehci->usbcmd;
+
+ /* Stop then Reset */
+ clrbits_le32(usb_cmd, UCMD_RUN_STOP);
+ while (readl(usb_cmd) & UCMD_RUN_STOP)
+ ;
+
+ setbits_le32(usb_cmd, UCMD_RESET);
+ while (readl(usb_cmd) & UCMD_RESET)
+ ;
+
+ /* Reset USBPHY module */
+ setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST);
+ udelay(10);
+
+ /* Remove CLKGATE and SFTRST */
+ clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST);
+ udelay(10);
+
+ /* Power up the PHY */
+ writel(0, phy_reg + USBPHY_PWD);
+
+ /* Enable FS/LS device */
+ setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 |
+ USBPHY_CTRL_ENUTMILEVEL3);
+}
+
+static void usb_oc_config(int index)
+{
+ void __iomem *ctrl;
+
+ ctrl = (void __iomem *)(nc_reg_bases[index] + USB_NC_REG_OFFSET);
+
+ setbits_le32(ctrl, UCTRL_OVER_CUR_POL);
+ setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);
+}
+
+int ehci_hcd_init(int index, enum usb_init_type init,
+ struct ehci_hccr **hccr, struct ehci_hcor **hcor)
+{
+ struct usb_ehci *ehci;
+
+ if (index >= ARRAY_SIZE(nc_reg_bases))
+ return -EINVAL;
+
+ if (init == USB_INIT_DEVICE && index == 1)
+ return -ENODEV;
+ if (init == USB_INIT_HOST && index == 0)
+ return -ENODEV;
+
+ ehci = (struct usb_ehci *)nc_reg_bases[index];
+
+ usb_power_config(index);
+ usb_oc_config(index);
+ usb_internal_phy_clock_gate(index);
+ usb_phy_enable(index, ehci);
+
+ *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
+ *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
+
+ if (init == USB_INIT_DEVICE) {
+ setbits_le32(&ehci->usbmode, CM_DEVICE);
+ writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
+ setbits_le32(&ehci->portsc, USB_EN);
+ } else if (init == USB_INIT_HOST) {
+ setbits_le32(&ehci->usbmode, CM_HOST);
+ writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
+ setbits_le32(&ehci->portsc, USB_EN);
+ }
+
+ return 0;
+}
+
+int ehci_hcd_stop(int index)
+{
+ return 0;
+}