From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001 From: Yuval Adam <_@yuv.al> Date: Wed, 30 Aug 2017 08:25:59 +0000 Subject: Initial file dump from open source release --- arch/powerpc/sysdev/qe_lib/usb.c | 56 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 arch/powerpc/sysdev/qe_lib/usb.c (limited to 'arch/powerpc/sysdev/qe_lib/usb.c') diff --git a/arch/powerpc/sysdev/qe_lib/usb.c b/arch/powerpc/sysdev/qe_lib/usb.c new file mode 100644 index 00000000..27f23bd1 --- /dev/null +++ b/arch/powerpc/sysdev/qe_lib/usb.c @@ -0,0 +1,56 @@ +/* + * QE USB routines + * + * Copyright 2006 Freescale Semiconductor, Inc. + * Shlomi Gridish + * Jerry Huang + * Copyright (c) MontaVista Software, Inc. 2008. + * Anton Vorontsov + * + * 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 +#include +#include +#include +#include +#include + +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); -- cgit v1.3.1