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/*
* QE USB routines
*
* Copyright (c) Freescale Semicondutor, Inc. 2006.
* Shlomi Gridish <gridish@freescale.com>
* Jerry Huang <Chang-Ming.Huang@freescale.com>
* Copyright (c) MontaVista Software, Inc. 2008.
* Anton Vorontsov <avorontsov@ru.mvista.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/io.h>
#include <asm/immap_qe.h>
#include <asm/qe.h>
int qe_usb_clock_set(enum qe_clock clk, int rate)
{
struct qe_mux __iomem *mux = &qe_immr->qmx;
unsigned long flags;
u32 val;
switch (clk) {
case QE_CLK3: val = QE_CMXGCR_USBCS_CLK3; break;
case QE_CLK5: val = QE_CMXGCR_USBCS_CLK5; break;
case QE_CLK7: val = QE_CMXGCR_USBCS_CLK7; break;
case QE_CLK9: val = QE_CMXGCR_USBCS_CLK9; break;
case QE_CLK13: val = QE_CMXGCR_USBCS_CLK13; break;
case QE_CLK17: val = QE_CMXGCR_USBCS_CLK17; break;
case QE_CLK19: val = QE_CMXGCR_USBCS_CLK19; break;
case QE_CLK21: val = QE_CMXGCR_USBCS_CLK21; break;
case QE_BRG9: val = QE_CMXGCR_USBCS_BRG9; break;
case QE_BRG10: val = QE_CMXGCR_USBCS_BRG10; break;
default:
pr_err("%s: requested unknown clock %d\n", __func__, clk);
return -EINVAL;
}
if (qe_clock_is_brg(clk))
qe_setbrg(clk, rate, 1);
spin_lock_irqsave(&cmxgcr_lock, flags);
clrsetbits_be32(&mux->cmxgcr, QE_CMXGCR_USBCS, val);
spin_unlock_irqrestore(&cmxgcr_lock, flags);
return 0;
}
EXPORT_SYMBOL(qe_usb_clock_set);
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