1/*
2 * QE USB routines
3 *
4 * Copyright 2006 Freescale Semiconductor, Inc.
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/export.h>
19#include <linux/io.h>
20#include <asm/immap_qe.h>
21#include <asm/qe.h>
22
23int qe_usb_clock_set(enum qe_clock clk, int rate)
24{
25	struct qe_mux __iomem *mux = &qe_immr->qmx;
26	unsigned long flags;
27	u32 val;
28
29	switch (clk) {
30	case QE_CLK3:  val = QE_CMXGCR_USBCS_CLK3;  break;
31	case QE_CLK5:  val = QE_CMXGCR_USBCS_CLK5;  break;
32	case QE_CLK7:  val = QE_CMXGCR_USBCS_CLK7;  break;
33	case QE_CLK9:  val = QE_CMXGCR_USBCS_CLK9;  break;
34	case QE_CLK13: val = QE_CMXGCR_USBCS_CLK13; break;
35	case QE_CLK17: val = QE_CMXGCR_USBCS_CLK17; break;
36	case QE_CLK19: val = QE_CMXGCR_USBCS_CLK19; break;
37	case QE_CLK21: val = QE_CMXGCR_USBCS_CLK21; break;
38	case QE_BRG9:  val = QE_CMXGCR_USBCS_BRG9;  break;
39	case QE_BRG10: val = QE_CMXGCR_USBCS_BRG10; break;
40	default:
41		pr_err("%s: requested unknown clock %d\n", __func__, clk);
42		return -EINVAL;
43	}
44
45	if (qe_clock_is_brg(clk))
46		qe_setbrg(clk, rate, 1);
47
48	spin_lock_irqsave(&cmxgcr_lock, flags);
49
50	clrsetbits_be32(&mux->cmxgcr, QE_CMXGCR_USBCS, val);
51
52	spin_unlock_irqrestore(&cmxgcr_lock, flags);
53
54	return 0;
55}
56EXPORT_SYMBOL(qe_usb_clock_set);
57