--- /dev/null
+/*
+ * Copyright (C) 2008 by NXP Semiconductors
+ * @Author: Based on code by Kevin Wells
+ * @Descr: USB driver - Embedded Artists LPC3250 OEM Board support functions
+ *
+ * Copyright (c) 2015 Tyco Fire Protection Products.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clk.h>
+#include <usb.h>
+#include <i2c.h>
+
+/* 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 wait_for_bit(void *reg, const u32 mask, bool set)
+{
+ u32 val;
+ unsigned long start = get_timer(0);
+
+ while (1) {
+ val = readl(reg);
+ if (!set)
+ val = ~val;
+
+ if ((val & mask) == mask)
+ return 0;
+
+ if (get_timer(start) > CONFIG_SYS_HZ)
+ break;
+
+ udelay(1);
+ }
+
+ error("Timeout (reg=%p mask=%08x wait_set=%i)\n", reg, mask, set);
+
+ return -ETIMEDOUT;
+}
+
+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)
+{
+ u32 ret;
+
+ /* 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);
+
+ ret = wait_for_bit(&clk_pwr->usb_ctrl, CLK_USBCTRL_PLL_STS, 1);
+ if (ret)
+ return ret;
+
+ /* enable PLL output */
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_CLK_EN2);
+
+ return 0;
+}
+
+int usb_cpu_init(void)
+{
+ u32 ret;
+
+ /*
+ * 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 */
+ writel(OTG_CLK_I2C_EN, &otg->otg_clk_ctrl);
+ ret = wait_for_bit(&otg->otg_clk_sts, OTG_CLK_I2C_EN, 1);
+ if (ret)
+ return ret;
+
+ /* Configure ISP1301 */
+ isp1301_configure();
+
+ /* setup USB clocks and PLL */
+ ret = usbpll_setup();
+ if (ret)
+ return ret;
+
+ /* enable usb_host_need_clk */
+ setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_USBHSTND_EN);
+
+ /* enable all needed USB clocks */
+ const u32 mask = OTG_CLK_AHB_EN | OTG_CLK_OTG_EN |
+ OTG_CLK_I2C_EN | OTG_CLK_HOST_EN;
+ writel(mask, &otg->otg_clk_ctrl);
+
+ ret = wait_for_bit(&otg->otg_clk_sts, mask, 1);
+ if (ret)
+ return ret;
+
+ 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();
+}
projects / oweals / u-boot.git / commitdiff