[U-Boot] [PATCH v2 5/6] usb: host: Add ehci-vf USB driver for ARM Vybrid SoC's
Sanchayan Maity
maitysanchayan at gmail.com
Wed Apr 8 15:20:09 CEST 2015
This driver adds support for the USB peripheral on Freescale Vybrid
SoC's.
Signed-off-by: Sanchayan Maity <maitysanchayan at gmail.com>
---
arch/arm/include/asm/arch-vf610/crm_regs.h | 10 ++
arch/arm/include/asm/arch-vf610/imx-regs.h | 4 +
arch/arm/include/asm/arch-vf610/regs-usbphy.h | 31 ++++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-vf.c | 196 ++++++++++++++++++++++++++
5 files changed, 242 insertions(+)
create mode 100644 arch/arm/include/asm/arch-vf610/regs-usbphy.h
create mode 100644 drivers/usb/host/ehci-vf.c
diff --git a/arch/arm/include/asm/arch-vf610/crm_regs.h b/arch/arm/include/asm/arch-vf610/crm_regs.h
index 78708e2..bc6db2a 100644
--- a/arch/arm/include/asm/arch-vf610/crm_regs.h
+++ b/arch/arm/include/asm/arch-vf610/crm_regs.h
@@ -189,6 +189,7 @@ struct anadig_reg {
#define CCM_REG_CTRL_MASK 0xffffffff
#define CCM_CCGR0_UART0_CTRL_MASK (0x3 << 14)
#define CCM_CCGR0_UART1_CTRL_MASK (0x3 << 16)
+#define CCM_CCGR1_USBC0_CTRL_MASK (0x3 << 8)
#define CCM_CCGR1_PIT_CTRL_MASK (0x3 << 14)
#define CCM_CCGR1_WDOGA5_CTRL_MASK (0x3 << 28)
#define CCM_CCGR2_QSPI0_CTRL_MASK (0x3 << 8)
@@ -207,14 +208,23 @@ struct anadig_reg {
#define CCM_CCGR6_OCOTP_CTRL_MASK (0x3 << 10)
#define CCM_CCGR6_DDRMC_CTRL_MASK (0x3 << 28)
#define CCM_CCGR7_SDHC1_CTRL_MASK (0x3 << 4)
+#define CCM_CCGR7_USBC1_CTRL_MASK (0x3 << 8)
#define CCM_CCGR9_FEC0_CTRL_MASK 0x3
#define CCM_CCGR9_FEC1_CTRL_MASK (0x3 << 2)
#define CCM_CCGR10_NFC_CTRL_MASK 0x3
+#define ANADIG_PLL7_CTRL_BYPASS (1 << 16)
+#define ANADIG_PLL7_CTRL_ENABLE (1 << 13)
+#define ANADIG_PLL7_CTRL_POWERDOWN (1 << 12)
+#define ANADIG_PLL7_CTRL_DIV_SELECT (1 << 1)
#define ANADIG_PLL5_CTRL_BYPASS (1 << 16)
#define ANADIG_PLL5_CTRL_ENABLE (1 << 13)
#define ANADIG_PLL5_CTRL_POWERDOWN (1 << 12)
#define ANADIG_PLL5_CTRL_DIV_SELECT 1
+#define ANADIG_PLL3_CTRL_BYPASS (1 << 16)
+#define ANADIG_PLL3_CTRL_ENABLE (1 << 13)
+#define ANADIG_PLL3_CTRL_POWERDOWN (1 << 12)
+#define ANADIG_PLL3_CTRL_DIV_SELECT (1 << 1)
#define ANADIG_PLL2_CTRL_ENABLE (1 << 13)
#define ANADIG_PLL2_CTRL_POWERDOWN (1 << 12)
#define ANADIG_PLL2_CTRL_DIV_SELECT 1
diff --git a/arch/arm/include/asm/arch-vf610/imx-regs.h b/arch/arm/include/asm/arch-vf610/imx-regs.h
index a5908ca..26057fe 100644
--- a/arch/arm/include/asm/arch-vf610/imx-regs.h
+++ b/arch/arm/include/asm/arch-vf610/imx-regs.h
@@ -52,6 +52,7 @@
#define SAI2_BASE_ADDR (AIPS0_BASE_ADDR + 0x00031000)
#define SAI3_BASE_ADDR (AIPS0_BASE_ADDR + 0x00032000)
#define CRC_BASE_ADDR (AIPS0_BASE_ADDR + 0x00033000)
+#define USBC0_BASE_ADDR (AIPS0_BASE_ADDR + 0x00034000)
#define PDB_BASE_ADDR (AIPS0_BASE_ADDR + 0x00036000)
#define PIT_BASE_ADDR (AIPS0_BASE_ADDR + 0x00037000)
#define FTM0_BASE_ADDR (AIPS0_BASE_ADDR + 0x00038000)
@@ -65,6 +66,8 @@
#define QSPI0_BASE_ADDR (AIPS0_BASE_ADDR + 0x00044000)
#define IOMUXC_BASE_ADDR (AIPS0_BASE_ADDR + 0x00048000)
#define ANADIG_BASE_ADDR (AIPS0_BASE_ADDR + 0x00050000)
+#define USB_PHY0_BASE_ADDR (AIPS0_BASE_ADDR + 0x00050800)
+#define USB_PHY1_BASE_ADDR (AIPS0_BASE_ADDR + 0x00050C00)
#define SCSC_BASE_ADDR (AIPS0_BASE_ADDR + 0x00052000)
#define ASRC_BASE_ADDR (AIPS0_BASE_ADDR + 0x00060000)
#define SPDIF_BASE_ADDR (AIPS0_BASE_ADDR + 0x00061000)
@@ -84,6 +87,7 @@
#define DDR_BASE_ADDR (AIPS1_BASE_ADDR + 0x0002E000)
#define ESDHC0_BASE_ADDR (AIPS1_BASE_ADDR + 0x00031000)
#define ESDHC1_BASE_ADDR (AIPS1_BASE_ADDR + 0x00032000)
+#define USBC1_BASE_ADDR (AIPS1_BASE_ADDR + 0x00034000)
#define ENET_BASE_ADDR (AIPS1_BASE_ADDR + 0x00050000)
#define ENET1_BASE_ADDR (AIPS1_BASE_ADDR + 0x00051000)
#define NFC_BASE_ADDR (AIPS1_BASE_ADDR + 0x00060000)
diff --git a/arch/arm/include/asm/arch-vf610/regs-usbphy.h b/arch/arm/include/asm/arch-vf610/regs-usbphy.h
new file mode 100644
index 0000000..b1b8876
--- /dev/null
+++ b/arch/arm/include/asm/arch-vf610/regs-usbphy.h
@@ -0,0 +1,31 @@
+/*
+ * Freescale Vybrid USB PHY Register Definitions
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __REGS_USBPHY_H__
+#define __REGS_USBPHY_H__
+
+#include <asm/imx-common/regs-common.h>
+
+struct vf_usbphy_regs {
+ mxs_reg_32(hw_usbphy_pwd)
+ mxs_reg_32(hw_usbphy_tx)
+ mxs_reg_32(hw_usbphy_rx)
+ mxs_reg_32(hw_usbphy_ctrl)
+ mxs_reg_32(hw_usbphy_status)
+ mxs_reg_32(hw_usbphy_debug)
+ mxs_reg_32(hw_usbphy_debug0_status)
+ mxs_reg_32(hw_usbphy_debug1)
+ mxs_reg_32(hw_usbphy_version)
+ mxs_reg_32(hw_usbphy_ip)
+};
+
+#define USBPHY_CTRL_ENUTMILEVEL2 (1 << 14)
+#define USBPHY_CTRL_ENUTMILEVEL3 (1 << 15)
+#define USBPHY_CTRL_OTG_ID (1 << 27)
+#define USBPHY_CTRL_CLKGATE (1 << 30)
+#define USBPHY_CTRL_SFTRST (1 << 31)
+
+#endif /* __REGS_USBPHY_H__ */
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index eb6f34b..4bd9321 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -39,6 +39,7 @@ 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..cbd3c8c
--- /dev/null
+++ b/drivers/usb/host/ehci-vf.c
@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2015 Sanchayan Maity <sanchayan.maity at toradex.com>
+ * Copyright (C) 2015 Toradex AG
+ *
+ * Based on ehci-mx6 and ehci-mxs 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/arch/regs-usbphy.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <usb/ehci-fsl.h>
+
+#include "ehci.h"
+
+#define ANADIG_PLL_CTRL_EN_USB_CLKS (1 << 6)
+
+#define USB_NC_REG_OFFSET 0x00000800
+
+#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 */
+
+struct ehci_vf_port {
+ uint32_t usb_regs;
+ struct vf_usbphy_regs *phy_regs;
+ struct anadig_reg *pll;
+ uint32_t pll_en_bits;
+};
+
+static const struct ehci_vf_port vf_port[] = {
+ {
+ USBC0_BASE_ADDR,
+ (struct vf_usbphy_regs *)USB_PHY0_BASE_ADDR,
+ (struct anadig_reg *)ANADIG_BASE_ADDR,
+ ANADIG_PLL3_CTRL_ENABLE | ANADIG_PLL3_CTRL_POWERDOWN
+ | ANADIG_PLL_CTRL_EN_USB_CLKS,
+ },
+ {
+ USBC1_BASE_ADDR,
+ (struct vf_usbphy_regs *)USB_PHY1_BASE_ADDR,
+ (struct anadig_reg *)ANADIG_BASE_ADDR,
+ ANADIG_PLL7_CTRL_ENABLE | ANADIG_PLL7_CTRL_POWERDOWN
+ | ANADIG_PLL_CTRL_EN_USB_CLKS,
+ },
+};
+
+static void usb_internal_phy_clock_gate(int index)
+{
+ const struct ehci_vf_port *port;
+
+ port = &vf_port[index];
+ writel(USBPHY_CTRL_CLKGATE, &port->phy_regs->hw_usbphy_ctrl_clr);
+}
+
+static void usb_power_config(int index)
+{
+ u32 reg;
+ const struct ehci_vf_port *port;
+
+ port = &vf_port[index];
+
+ switch (index) {
+ case 0:
+ reg = readl(&port->pll->pll3_ctrl);
+ reg &= ~ANADIG_PLL3_CTRL_BYPASS;
+ writel(reg, &port->pll->pll3_ctrl);
+
+ reg = readl(&port->pll->pll3_ctrl);
+ reg |= port->pll_en_bits;
+ writel(reg, &port->pll->pll3_ctrl);
+ break;
+ case 1:
+ reg = readl(&port->pll->pll7_ctrl);
+ reg &= ~ANADIG_PLL7_CTRL_BYPASS;
+ writel(reg, &port->pll->pll7_ctrl);
+
+ reg = readl(&port->pll->pll7_ctrl);
+ reg |= port->pll_en_bits;
+ writel(reg, &port->pll->pll7_ctrl);
+ break;
+ default:
+ return;
+ }
+}
+
+static void usb_phy_enable(int index, struct usb_ehci *ehci)
+{
+ u32 val;
+ void __iomem *usb_cmd;
+ const struct ehci_vf_port *port;
+
+ port = &vf_port[index];
+ usb_cmd = (void __iomem *)&ehci->usbcmd;
+
+ /* Stop then Reset */
+ val = readl(usb_cmd);
+ val &= ~UCMD_RUN_STOP;
+ writel(val, usb_cmd);
+ while (readl(usb_cmd) & UCMD_RUN_STOP)
+ ;
+
+ val = readl(usb_cmd);
+ val |= UCMD_RESET;
+ writel(val, usb_cmd);
+ while (readl(usb_cmd) & UCMD_RESET)
+ ;
+
+ /* Reset USBPHY module */
+ writel(USBPHY_CTRL_SFTRST, &port->phy_regs->hw_usbphy_ctrl_set);
+ udelay(10);
+
+ /* Remove CLKGATE and SFTRST */
+ writel(USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST,
+ &port->phy_regs->hw_usbphy_ctrl_clr);
+ udelay(10);
+
+ /* Power up the PHY */
+ writel(0, &port->phy_regs->hw_usbphy_pwd);
+
+ /* enable FS/LS device */
+ writel(USBPHY_CTRL_ENUTMILEVEL2 | USBPHY_CTRL_ENUTMILEVEL3,
+ &port->phy_regs->hw_usbphy_ctrl_set);
+}
+
+static void usb_oc_config(int index)
+{
+ u32 val;
+ const struct ehci_vf_port *port;
+
+ port = &vf_port[index];
+
+ val = readl(&port->usb_regs + USB_NC_REG_OFFSET);
+ val |= UCTRL_OVER_CUR_POL;
+ writel(val, &port->usb_regs + USB_NC_REG_OFFSET);
+
+ val = readl(&port->usb_regs + USB_NC_REG_OFFSET);
+ val |= UCTRL_OVER_CUR_DIS;
+ writel(val, &port->usb_regs + USB_NC_REG_OFFSET);
+}
+
+int ehci_hcd_init(int index, enum usb_init_type init,
+ struct ehci_hccr **hccr, struct ehci_hcor **hcor)
+{
+ struct usb_ehci *ehci;
+ const struct ehci_vf_port *port;
+
+ if (index >= ARRAY_SIZE(vf_port))
+ return -EINVAL;
+
+ if (init == USB_INIT_DEVICE && index == 1)
+ return -ENODEV;
+ if (init == USB_INIT_HOST && index == 0)
+ return -ENODEV;
+
+ port = &vf_port[index];
+
+ ehci = (struct usb_ehci *)(port->usb_regs);
+
+ 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;
+}
--
2.3.5
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