2 * This file configures the internal USB PHY in OMAP4430. Used
3 * with TWL6030 transceiver and MUSB on OMAP4430.
5 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Author: Hema HK <hemahk@ti.com>
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/types.h>
25 #include <linux/delay.h>
26 #include <linux/clk.h>
28 #include <linux/err.h>
29 #include <linux/usb.h>
30 #include <linux/usb/musb.h>
36 void am35x_musb_reset(void)
40 /* Reset the musb interface */
41 regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
43 regval |= AM35XX_USBOTGSS_SW_RST;
44 omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET);
46 regval &= ~AM35XX_USBOTGSS_SW_RST;
47 omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET);
49 regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
52 void am35x_musb_phy_power(u8 on)
54 unsigned long timeout = jiffies + msecs_to_jiffies(100);
59 * Start the on-chip PHY and its PLL.
61 devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2);
63 devconf2 &= ~(CONF2_RESET | CONF2_PHYPWRDN | CONF2_OTGPWRDN);
64 devconf2 |= CONF2_PHY_PLLON;
66 omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
68 pr_info(KERN_INFO "Waiting for PHY clock good...\n");
69 while (!(omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2)
73 if (time_after(jiffies, timeout)) {
74 pr_err(KERN_ERR "musb PHY clock good timed out\n");
80 * Power down the on-chip PHY.
82 devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2);
84 devconf2 &= ~CONF2_PHY_PLLON;
85 devconf2 |= CONF2_PHYPWRDN | CONF2_OTGPWRDN;
86 omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
90 void am35x_musb_clear_irq(void)
94 regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
95 regval |= AM35XX_USBOTGSS_INT_CLR;
96 omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR);
97 regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
100 void am35x_set_mode(u8 musb_mode)
102 u32 devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2);
104 devconf2 &= ~CONF2_OTGMODE;
106 case MUSB_HOST: /* Force VBUS valid, ID = 0 */
107 devconf2 |= CONF2_FORCE_HOST;
109 case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */
110 devconf2 |= CONF2_FORCE_DEVICE;
112 case MUSB_OTG: /* Don't override the VBUS/ID comparators */
113 devconf2 |= CONF2_NO_OVERRIDE;
116 pr_info(KERN_INFO "Unsupported mode %u\n", musb_mode);
119 omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
122 void ti81xx_musb_phy_power(u8 on)
124 void __iomem *scm_base = NULL;
127 scm_base = ioremap(TI81XX_SCM_BASE, SZ_2K);
129 pr_err("system control module ioremap failed\n");
133 usbphycfg = __raw_readl(scm_base + USBCTRL0);
136 if (cpu_is_ti816x()) {
137 usbphycfg |= TI816X_USBPHY0_NORMAL_MODE;
138 usbphycfg &= ~TI816X_USBPHY_REFCLK_OSC;
139 } else if (cpu_is_ti814x()) {
140 usbphycfg &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN
141 | USBPHY_DPINPUT | USBPHY_DMINPUT);
142 usbphycfg |= (USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN
143 | USBPHY_DPOPBUFCTL | USBPHY_DMOPBUFCTL);
147 usbphycfg &= ~TI816X_USBPHY0_NORMAL_MODE;
148 else if (cpu_is_ti814x())
149 usbphycfg |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
152 __raw_writel(usbphycfg, scm_base + USBCTRL0);