usb/musb/am35x.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * am35x.c - TI's AM35x platform specific usb wrapper functions.
24  * Enable the USB phy
31 	devconf2 = readl(&am35x_scm_general_regs->devconf2);  in phy_on()
39 	writel(devconf2, &am35x_scm_general_regs->devconf2);  in phy_on()
41 	/* wait until the USB phy is turned on */  in phy_on()
43 	while (timeout--)  in phy_on()
44 		if (readl(&am35x_scm_general_regs->devconf2) & DEVCONF2_PHYCKGD)  in phy_on()
47 	/* USB phy was not turned on */  in phy_on()
52  * Disable the USB phy
59 	 * Power down the on-chip PHY.  in phy_off()
61 	devconf2 = readl(&am35x_scm_general_regs->devconf2);  in phy_off()
65 	writel(devconf2, &am35x_scm_general_regs->devconf2);  in phy_off()
77 	sw_reset = readl(&am35x_scm_general_regs->ip_sw_reset);  in musb_platform_init()
79 	writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset);  in musb_platform_init()
81 	writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset);  in musb_platform_init()
84 	writel(0x1, &am35x_usb_regs->control);  in musb_platform_init()
87 	/* start the on-chip usb phy and its pll */  in musb_platform_init()
89 		return -1;  in musb_platform_init()
92 	revision = readl(&am35x_usb_regs->revision);  in musb_platform_init()
94 		return -1;  in musb_platform_init()
104 	/* Turn off the phy */  in musb_platform_deinit()
112  * ep           - endpoint number
113  * length       - number of bytes to read from FIFO
114  * fifo_data    - pointer to data buffer into which data is read
124 	writeb(ep, &musbr->index);  in read_fifo()
128 			val = readl(&musbr->fifox[ep]);  in read_fifo()
135 		val = readl(&musbr->fifox[ep]);  in read_fifo()