57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
|
/*
|
||
|
|
* QE USB routines
|
||
|
|
*
|
||
|
|
* Copyright 2006 Freescale Semiconductor, Inc.
|
||
|
|
* 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 <soc/fsl/qe/immap_qe.h>
|
||
|
|
#include <soc/fsl/qe/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);
|