xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc/QE: add support for QE USB clocks routing

Browse Source 
This patch adds a function to the qe_lib to setup QE USB clocks routing.
To setup clocks safely, cmxgcr register needs locking, so I just reused
ucc_lock since it was used only to protect cmxgcr.

The idea behind placing clocks routing functions into the qe_lib is that
later we'll hopefully switch to the generic Linux Clock API, thus, for
example, FHCI driver may be used for QE and CPM chips without nasty #ifdefs.

This patch also fixes QE_USB_RESTART_TX command definition in the qe.h.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-By: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov
2008-05-23 20:38:56 +04:00
committed by Kumar Gala
parent 83ff9dcf37
commit 5e41486c40
5 changed files with 86 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/powerpc/sysdev/qe_lib/Kconfig
View File

@@ -20,3 +20,7 @@ config UCC
bool
default y if UCC_FAST || UCC_SLOW
config QE_USB
bool
help
QE USB Host Controller support

1
arch/powerpc/sysdev/qe_lib/Makefile
View File

@@ -6,3 +6,4 @@ obj-$(CONFIG_QUICC_ENGINE)+= qe.o qe_ic.o qe_io.o
obj-$(CONFIG_UCC) += ucc.o
obj-$(CONFIG_UCC_SLOW) += ucc_slow.o
obj-$(CONFIG_UCC_FAST) += ucc_fast.o
obj-$(CONFIG_QE_USB) += usb.o

7
arch/powerpc/sysdev/qe_lib/ucc.c
View File

@@ -26,7 +26,8 @@
#include <asm/qe.h>
#include <asm/ucc.h>
static DEFINE_SPINLOCK(ucc_lock);
DEFINE_SPINLOCK(cmxgcr_lock);
EXPORT_SYMBOL(cmxgcr_lock);
int ucc_set_qe_mux_mii_mng(unsigned int ucc_num)
{
@@ -35,10 +36,10 @@ int ucc_set_qe_mux_mii_mng(unsigned int ucc_num)
if (ucc_num > UCC_MAX_NUM - 1)
return -EINVAL;
spin_lock_irqsave(&ucc_lock, flags);
spin_lock_irqsave(&cmxgcr_lock, flags);
clrsetbits_be32(&qe_immr->qmx.cmxgcr, QE_CMXGCR_MII_ENET_MNG,
ucc_num << QE_CMXGCR_MII_ENET_MNG_SHIFT);
spin_unlock_irqrestore(&ucc_lock, flags);
spin_unlock_irqrestore(&cmxgcr_lock, flags);
return 0;
}

55
arch/powerpc/sysdev/qe_lib/usb.c Normal file
View File

@@ -0,0 +1,55 @@
/*
* 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/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);