1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2012 4 * eInfochips Ltd. <www.einfochips.com> 5 * Written-by: Ajay Bhargav <contact (at) 8051projects.net> 6 * 7 * (C) Copyright 2009 8 * Marvell Semiconductor <www.marvell.com> 9 */ 10 11 #include <common.h> 12 #include <asm/io.h> 13 #include <usb.h> 14 #include <asm/arch/cpu.h> 15 #include <asm/arch/armada100.h> 16 #include <asm/arch/utmi-armada100.h> 17 18 static int utmi_phy_init(void) 19 { 20 struct armd1usb_phy_reg *phy_regs = 21 (struct armd1usb_phy_reg *)UTMI_PHY_BASE; 22 int timeout; 23 24 setbits_le32(&phy_regs->utmi_ctrl, INPKT_DELAY_SOF | PLL_PWR_UP); 25 udelay(1000); 26 setbits_le32(&phy_regs->utmi_ctrl, PHY_PWR_UP); 27 28 clrbits_le32(&phy_regs->utmi_pll, PLL_FBDIV_MASK | PLL_REFDIV_MASK); 29 setbits_le32(&phy_regs->utmi_pll, N_DIVIDER << PLL_FBDIV | M_DIVIDER); 30 31 setbits_le32(&phy_regs->utmi_tx, PHSEL_VAL << CK60_PHSEL); 32 33 /* Calibrate pll */ 34 timeout = 10000; 35 while (--timeout && ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0)) 36 ; 37 if (!timeout) 38 return -1; 39 40 udelay(200); 41 setbits_le32(&phy_regs->utmi_pll, VCOCAL_START); 42 udelay(400); 43 clrbits_le32(&phy_regs->utmi_pll, VCOCAL_START); 44 45 udelay(200); 46 setbits_le32(&phy_regs->utmi_tx, RCAL_START); 47 udelay(400); 48 clrbits_le32(&phy_regs->utmi_tx, RCAL_START); 49 50 timeout = 10000; 51 while (--timeout && ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0)) 52 ; 53 if (!timeout) 54 return -1; 55 56 return 0; 57 } 58 59 /* 60 * Initialize USB host controller's UTMI Physical interface 61 */ 62 int utmi_init(void) 63 { 64 struct armd1mpmu_registers *mpmu_regs = 65 (struct armd1mpmu_registers *)ARMD1_MPMU_BASE; 66 67 struct armd1apmu_registers *apmu_regs = 68 (struct armd1apmu_registers *)ARMD1_APMU_BASE; 69 70 /* Turn on 26Mhz ref clock for UTMI PLL */ 71 setbits_le32(&mpmu_regs->acgr, APB2_26M_EN | AP_26M); 72 73 /* USB Clock reset */ 74 writel(USB_SPH_AXICLK_EN, &apmu_regs->usbcrc); 75 writel(USB_SPH_AXICLK_EN | USB_SPH_AXI_RST, &apmu_regs->usbcrc); 76 77 /* Initialize UTMI transceiver */ 78 return utmi_phy_init(); 79 } 80
