1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2012
4 * eInfochips Ltd. <www.einfochips.com>
5 * Written-by: Ajay Bhargav <contact@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
utmi_phy_init(void)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 */
utmi_init(void)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