1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * QE USB routines
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2006 Freescale Semiconductor, Inc.
6*4882a593Smuzhiyun * Shlomi Gridish <gridish@freescale.com>
7*4882a593Smuzhiyun * Jerry Huang <Chang-Ming.Huang@freescale.com>
8*4882a593Smuzhiyun * Copyright (c) MontaVista Software, Inc. 2008.
9*4882a593Smuzhiyun * Anton Vorontsov <avorontsov@ru.mvista.com>
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/kernel.h>
13*4882a593Smuzhiyun #include <linux/errno.h>
14*4882a593Smuzhiyun #include <linux/export.h>
15*4882a593Smuzhiyun #include <linux/io.h>
16*4882a593Smuzhiyun #include <soc/fsl/qe/immap_qe.h>
17*4882a593Smuzhiyun #include <soc/fsl/qe/qe.h>
18*4882a593Smuzhiyun
qe_usb_clock_set(enum qe_clock clk,int rate)19*4882a593Smuzhiyun int qe_usb_clock_set(enum qe_clock clk, int rate)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct qe_mux __iomem *mux = &qe_immr->qmx;
22*4882a593Smuzhiyun unsigned long flags;
23*4882a593Smuzhiyun u32 val;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun switch (clk) {
26*4882a593Smuzhiyun case QE_CLK3: val = QE_CMXGCR_USBCS_CLK3; break;
27*4882a593Smuzhiyun case QE_CLK5: val = QE_CMXGCR_USBCS_CLK5; break;
28*4882a593Smuzhiyun case QE_CLK7: val = QE_CMXGCR_USBCS_CLK7; break;
29*4882a593Smuzhiyun case QE_CLK9: val = QE_CMXGCR_USBCS_CLK9; break;
30*4882a593Smuzhiyun case QE_CLK13: val = QE_CMXGCR_USBCS_CLK13; break;
31*4882a593Smuzhiyun case QE_CLK17: val = QE_CMXGCR_USBCS_CLK17; break;
32*4882a593Smuzhiyun case QE_CLK19: val = QE_CMXGCR_USBCS_CLK19; break;
33*4882a593Smuzhiyun case QE_CLK21: val = QE_CMXGCR_USBCS_CLK21; break;
34*4882a593Smuzhiyun case QE_BRG9: val = QE_CMXGCR_USBCS_BRG9; break;
35*4882a593Smuzhiyun case QE_BRG10: val = QE_CMXGCR_USBCS_BRG10; break;
36*4882a593Smuzhiyun default:
37*4882a593Smuzhiyun pr_err("%s: requested unknown clock %d\n", __func__, clk);
38*4882a593Smuzhiyun return -EINVAL;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun if (qe_clock_is_brg(clk))
42*4882a593Smuzhiyun qe_setbrg(clk, rate, 1);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun spin_lock_irqsave(&cmxgcr_lock, flags);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun qe_clrsetbits_be32(&mux->cmxgcr, QE_CMXGCR_USBCS, val);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun spin_unlock_irqrestore(&cmxgcr_lock, flags);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun return 0;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun EXPORT_SYMBOL(qe_usb_clock_set);
53