@@ -82,6 +82,12 @@ void lpc32xx_i2c_init(unsigned int devnum)
writel(ctrl, &clk->i2cclk_ctrl);
}
+void lpc32xx_usb_init(void)
+{
+ /* Do not route the UART 5 Tx/Rx pins to the USB D+ and USB D- pins. */
+ clrbits_le32(&ctrl->ctrl, UART_CTRL_UART5_USB_MODE);
+}
+
U_BOOT_DEVICE(lpc32xx_gpios) = {
.name = "gpio_lpc32xx"
};
@@ -167,6 +167,18 @@ struct clk_pm_regs {
/* SDRAMCLK register bits */
#define CLK_SDRAM_DDR_SEL (1 << 1)
+/* USB control register definitions */
+#define CLK_USBCTRL_PLL_STS (1 << 0)
+#define CLK_USBCTRL_FDBK_PLUS1(n) (((n) & 0xFF) << 1)
+#define CLK_USBCTRL_POSTDIV_2POW(n) (((n) & 0x3) << 11)
+#define CLK_USBCTRL_PLL_PWRUP (1 << 16)
+#define CLK_USBCTRL_CLK_EN1 (1 << 17)
+#define CLK_USBCTRL_CLK_EN2 (1 << 18)
+#define CLK_USBCTRL_BUS_KEEPER (0x1 << 19)
+#define CLK_USBCTRL_USBHSTND_EN (1 << 21)
+#define CLK_USBCTRL_USBDVND_EN (1 << 22)
+#define CLK_USBCTRL_HCLK_EN (1 << 24)
+
unsigned int get_sys_clk_rate(void);
unsigned int get_hclk_pll_rate(void);
unsigned int get_hclk_clk_div(void);
@@ -14,6 +14,7 @@ void lpc32xx_mac_init(void);
void lpc32xx_mlc_nand_init(void);
void lpc32xx_slc_nand_init(void);
void lpc32xx_dma_init(void);
+void lpc32xx_usb_init(void);
void lpc32xx_i2c_init(unsigned int devnum);
void lpc32xx_ssp_init(void);
#if defined(CONFIG_SPL_BUILD)
@@ -20,6 +20,7 @@ obj-$(CONFIG_USB_SL811HS) += sl811-hcd.o
obj-$(CONFIG_USB_OHCI_S3C24XX) += ohci-s3c24xx.o
obj-$(CONFIG_USB_OHCI_EP93XX) += ohci-ep93xx.o
obj-$(CONFIG_USB_OHCI_SUNXI) += ohci-sunxi.o
+obj-$(CONFIG_USB_OHCI_LPC32XX) += ohci-lpc32xx.o
# echi
obj-$(CONFIG_USB_EHCI) += ehci-hcd.o
new file mode 100644
@@ -0,0 +1,238 @@
+/*
+ * Copyright (C) 2008-2015 by NXP Semiconductors
+ * All rights reserved.
+ *
+ * @Author: Based on code by Kevin Wells
+ * @Descr: USB driver - Embedded Artists LPC3250 OEM Board support functions
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clk.h>
+#include <usb.h>
+#include <i2c.h>
+
+/*
+ * Notes:
+ *
+ * Only bitfield masks/values which are actually used by the driver
+ * are defined.
+ */
+
+/* OTG I2C controller module register structures */
+struct otgi2c_regs {
+ u32 otg_i2c_txrx; /* OTG I2C Tx/Rx Data FIFO */
+ u32 otg_i2c_stat; /* OTG I2C Status Register */
+ u32 otg_i2c_ctrl; /* OTG I2C Control Register */
+ u32 otg_i2c_clk_hi; /* OTG I2C Clock Divider high */
+ u32 otg_i2c_clk_lo; /* OTG I2C Clock Divider low */
+};
+
+/* OTG controller module register structures */
+struct otg_regs {
+ u32 reserved1[64];
+ u32 otg_int_sts; /* OTG int status register */
+ u32 otg_int_enab; /* OTG int enable register */
+ u32 otg_int_set; /* OTG int set register */
+ u32 otg_int_clr; /* OTG int clear register */
+ u32 otg_sts_ctrl; /* OTG status/control register */
+ u32 otg_timer; /* OTG timer register */
+ u32 reserved2[122];
+ struct otgi2c_regs otg_i2c;
+ u32 reserved3[824];
+ u32 otg_clk_ctrl; /* OTG clock control reg */
+ u32 otg_clk_sts; /* OTG clock status reg */
+};
+
+/* otg_sts_ctrl register definitions */
+#define OTG_HOST_EN (1 << 0) /* Enable host mode */
+
+/* otg_clk_ctrl and otg_clk_sts register definitions */
+#define OTG_CLK_AHB_EN (1 << 4) /* Enable AHB clock */
+#define OTG_CLK_OTG_EN (1 << 3) /* Enable OTG clock */
+#define OTG_CLK_I2C_EN (1 << 2) /* Enable I2C clock */
+#define OTG_CLK_HOST_EN (1 << 0) /* Enable host clock */
+
+/* ISP1301 USB transceiver I2C registers */
+#define MC1_SPEED_REG (1 << 0)
+#define MC1_DAT_SE0 (1 << 2)
+#define MC1_UART_EN (1 << 6)
+
+#define MC2_SPD_SUSP_CTRL (1 << 1)
+#define MC2_BI_DI (1 << 2)
+#define MC2_PSW_EN (1 << 6)
+
+#define OTG1_DP_PULLUP (1 << 0)
+#define OTG1_DM_PULLUP (1 << 1)
+#define OTG1_DP_PULLDOWN (1 << 2)
+#define OTG1_DM_PULLDOWN (1 << 3)
+#define OTG1_VBUS_DRV (1 << 5)
+
+#define ISP1301_I2C_ADDR CONFIG_USB_ISP1301_I2C_ADDR
+
+#define ISP1301_I2C_MODE_CONTROL_1_SET 0x04
+#define ISP1301_I2C_MODE_CONTROL_1_CLR 0x05
+#define ISP1301_I2C_MODE_CONTROL_2_SET 0x12
+#define ISP1301_I2C_MODE_CONTROL_2_CLR 0x13
+#define ISP1301_I2C_OTG_CONTROL_1_SET 0x06
+#define ISP1301_I2C_OTG_CONTROL_1_CLR 0x07
+#define ISP1301_I2C_INTERRUPT_LATCH_CLR 0x0B
+#define ISP1301_I2C_INTERRUPT_FALLING_CLR 0x0D
+#define ISP1301_I2C_INTERRUPT_RISING_CLR 0x0F
+
+static struct otg_regs *otg = (struct otg_regs *)USB_BASE;
+static struct clk_pm_regs *clk_pwr = (struct clk_pm_regs *)CLK_PM_BASE;
+
+static int isp1301_set_value(int reg, u8 value)
+{
+ return i2c_write(ISP1301_I2C_ADDR, reg, 1, &value, 1);
+}
+
+static void isp1301_configure(void)
+{
+ i2c_set_bus_num(I2C_2);
+
+ /* LPC32XX only supports DAT_SE0 USB mode */
+ /* This sequence is important */
+
+ /* Disable transparent UART mode first */
+ isp1301_set_value(ISP1301_I2C_MODE_CONTROL_1_CLR, MC1_UART_EN);
+
+ isp1301_set_value(ISP1301_I2C_MODE_CONTROL_1_CLR, ~MC1_SPEED_REG);
+ isp1301_set_value(ISP1301_I2C_MODE_CONTROL_1_SET, MC1_SPEED_REG);
+ isp1301_set_value(ISP1301_I2C_MODE_CONTROL_2_CLR, ~0);
+ isp1301_set_value(ISP1301_I2C_MODE_CONTROL_2_SET,
+ MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL);
+
+ isp1301_set_value(ISP1301_I2C_OTG_CONTROL_1_CLR, ~0);
+ isp1301_set_value(ISP1301_I2C_MODE_CONTROL_1_SET, MC1_DAT_SE0);
+ isp1301_set_value(ISP1301_I2C_OTG_CONTROL_1_SET,
+ OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
+ isp1301_set_value(ISP1301_I2C_OTG_CONTROL_1_CLR,
+ OTG1_DM_PULLUP | OTG1_DP_PULLUP);
+ isp1301_set_value(ISP1301_I2C_INTERRUPT_LATCH_CLR, ~0);
+ isp1301_set_value(ISP1301_I2C_INTERRUPT_FALLING_CLR, ~0);
+ isp1301_set_value(ISP1301_I2C_INTERRUPT_RISING_CLR, ~0);
+
+ /* Enable usb_need_clk clock after transceiver is initialized */
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_USBDVND_EN);
+}
+
+static int usbpll_setup(void)
+{
+ unsigned long start;
+
+ /* make sure clocks are disabled */
+ clrbits_le32(&clk_pwr->usb_ctrl,
+ CLK_USBCTRL_CLK_EN1 | CLK_USBCTRL_CLK_EN2);
+
+ /* start PLL clock input */
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_CLK_EN1);
+
+ /* Setup PLL. */
+ setbits_le32(&clk_pwr->usb_ctrl,
+ CLK_USBCTRL_FDBK_PLUS1(192 - 1));
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_POSTDIV_2POW(0x01));
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_PLL_PWRUP);
+
+ start = get_timer(0);
+ while (1) {
+ if ((readl(clk_pwr->usb_ctrl) & CLK_USBCTRL_PLL_STS) != 0)
+ break;
+
+ if (get_timer(start) > 10000) {
+ printf("usbpll_setup: ERROR PLL doesn't lock\n");
+ return -1;
+ }
+
+ udelay(1);
+ }
+
+ /* enable PLL output */
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_CLK_EN2);
+
+ return 0;
+}
+
+int usb_cpu_init(void)
+{
+ unsigned long start;
+
+ /* USB pins routing setup is done by "lpc32xx_usb_init()" and should
+ * be call by board "board_init()" or "misc_init_r()" functions. */
+
+ /* enable AHB slave USB clock */
+ setbits_le32(&clk_pwr->usb_ctrl,
+ CLK_USBCTRL_HCLK_EN | CLK_USBCTRL_BUS_KEEPER);
+
+ /* enable I2C clock in OTG block if it isn't */
+ if ((readl(&otg->otg_clk_sts) & OTG_CLK_I2C_EN) != OTG_CLK_I2C_EN) {
+ writel(OTG_CLK_I2C_EN, &otg->otg_clk_ctrl);
+
+ start = get_timer(0);
+ while (1) {
+ if (readl(&otg->otg_clk_sts) == OTG_CLK_I2C_EN)
+ break;
+
+ if (get_timer(start) > 100)
+ return -1;
+
+ udelay(1);
+ }
+ }
+
+ /* Configure ISP1301 */
+ isp1301_configure();
+
+ /* setup USB clocks and PLL */
+ if (usbpll_setup() == -1)
+ return -1;
+
+ /* enable usb_host_need_clk */
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_USBHSTND_EN);
+
+ /* enable all needed USB clocks */
+ writel(OTG_CLK_AHB_EN | OTG_CLK_OTG_EN |
+ OTG_CLK_I2C_EN | OTG_CLK_HOST_EN,
+ &otg->otg_clk_ctrl);
+
+ start = get_timer(0);
+ while (1) {
+ if ((readl(&otg->otg_clk_ctrl) &
+ (OTG_CLK_AHB_EN | OTG_CLK_OTG_EN |
+ OTG_CLK_I2C_EN | OTG_CLK_HOST_EN)) ==
+ (OTG_CLK_AHB_EN | OTG_CLK_OTG_EN |
+ OTG_CLK_I2C_EN | OTG_CLK_HOST_EN))
+ break;
+
+ if (get_timer(start) > 100)
+ return -1;
+
+ udelay(1);
+ }
+
+ setbits_le32(&otg->otg_sts_ctrl, OTG_HOST_EN);
+ isp1301_set_value(ISP1301_I2C_OTG_CONTROL_1_SET, OTG1_VBUS_DRV);
+
+ return 0;
+}
+
+int usb_cpu_stop(void)
+{
+ /* vbus off */
+ isp1301_set_value(ISP1301_I2C_OTG_CONTROL_1_SET, OTG1_VBUS_DRV);
+
+ clrbits_le32(&otg->otg_sts_ctrl, OTG_HOST_EN);
+
+ clrbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_HCLK_EN);
+
+ return 0;
+}
+
+int usb_cpu_init_fail(void)
+{
+ return usb_cpu_stop();
+}