1/*
 2 * QE USB routines
 3 *
 4 * Copyright (c) Freescale Semicondutor, Inc. 2006.
 5 *               Shlomi Gridish <gridish@freescale.com>
 6 *               Jerry Huang <Chang-Ming.Huang@freescale.com>
 7 * Copyright (c) MontaVista Software, Inc. 2008.
 8 *               Anton Vorontsov <avorontsov@ru.mvista.com>
 9 *
10 * This program is free software; you can redistribute  it and/or modify it
11 * under  the terms of  the GNU General  Public License as published by the
12 * Free Software Foundation;  either version 2 of the  License, or (at your
13 * option) any later version.
14 */
15
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/io.h>
19#include <asm/immap_qe.h>
20#include <asm/qe.h>
21
22int qe_usb_clock_set(enum qe_clock clk, int rate)
23{
24	struct qe_mux __iomem *mux = &qe_immr->qmx;
25	unsigned long flags;
26	u32 val;
27
28	switch (clk) {
29	case QE_CLK3:  val = QE_CMXGCR_USBCS_CLK3;  break;
30	case QE_CLK5:  val = QE_CMXGCR_USBCS_CLK5;  break;
31	case QE_CLK7:  val = QE_CMXGCR_USBCS_CLK7;  break;
32	case QE_CLK9:  val = QE_CMXGCR_USBCS_CLK9;  break;
33	case QE_CLK13: val = QE_CMXGCR_USBCS_CLK13; break;
34	case QE_CLK17: val = QE_CMXGCR_USBCS_CLK17; break;
35	case QE_CLK19: val = QE_CMXGCR_USBCS_CLK19; break;
36	case QE_CLK21: val = QE_CMXGCR_USBCS_CLK21; break;
37	case QE_BRG9:  val = QE_CMXGCR_USBCS_BRG9;  break;
38	case QE_BRG10: val = QE_CMXGCR_USBCS_BRG10; break;
39	default:
40		pr_err("%s: requested unknown clock %d\n", __func__, clk);
41		return -EINVAL;
42	}
43
44	if (qe_clock_is_brg(clk))
45		qe_setbrg(clk, rate, 1);
46
47	spin_lock_irqsave(&cmxgcr_lock, flags);
48
49	clrsetbits_be32(&mux->cmxgcr, QE_CMXGCR_USBCS, val);
50
51	spin_unlock_irqrestore(&cmxgcr_lock, flags);
52
53	return 0;
54}
55EXPORT_SYMBOL(qe_usb_clock_set);