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https://github.com/edk2-porting/linux-next.git
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usb: musb: add debugfs support
for now only a simple register dump entry (which can be rather useful on debugging) and a way to start test modes. Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Felipe Balbi
Greg Kroah-Hartman
parent
6ddc6dae4a
commit
7f7f9e2a5a
@ -42,6 +42,10 @@ ifeq ($(CONFIG_USB_MUSB_HDRC_HCD),y)
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musb_hdrc-objs += musb_virthub.o musb_host.o
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endif
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ifeq ($(CONFIG_DEBUG_FS),y)
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musb_hdrc-objs += musb_debugfs.o
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endif
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# the kconfig must guarantee that only one of the
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# possible I/O schemes will be enabled at a time ...
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# PIO only, or DMA (several potential schemes).
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@ -2054,6 +2054,10 @@ bad_config:
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if (status < 0)
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goto fail3;
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status = musb_init_debugfs(musb);
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if (status < 0)
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goto fail2;
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#ifdef CONFIG_SYSFS
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status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
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if (status)
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@ -2150,6 +2154,7 @@ static int __exit musb_remove(struct platform_device *pdev)
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* - Peripheral mode: peripheral is deactivated (or never-activated)
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* - OTG mode: both roles are deactivated (or never-activated)
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*/
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musb_exit_debugfs(musb);
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musb_shutdown(pdev);
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#ifdef CONFIG_USB_MUSB_HDRC_HCD
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if (musb->board_mode == MUSB_HOST)
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@ -59,4 +59,17 @@ static inline int _dbg_level(unsigned l)
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extern const char *otg_state_string(struct musb *);
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#ifdef CONFIG_DEBUG_FS
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extern int musb_init_debugfs(struct musb *musb);
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extern void musb_exit_debugfs(struct musb *musb);
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#else
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static inline int musb_init_debugfs(struct musb *musb)
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{
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return 0;
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}
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static inline void musb_exit_debugfs(struct musb *musb)
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{
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}
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#endif
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#endif /* __MUSB_LINUX_DEBUG_H__ */
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295
drivers/usb/musb/musb_debugfs.c
Normal file
295
drivers/usb/musb/musb_debugfs.c
Normal file
@ -0,0 +1,295 @@
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/*
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* MUSB OTG driver debugfs support
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*
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* Copyright 2010 Nokia Corporation
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* Contact: Felipe Balbi <felipe.balbi@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/kobject.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#ifdef CONFIG_ARM
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#include <mach/hardware.h>
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#include <mach/memory.h>
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#include <asm/mach-types.h>
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#endif
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#include <asm/uaccess.h>
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#include "musb_core.h"
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#include "musb_debug.h"
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#ifdef CONFIG_ARCH_DAVINCI
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#include "davinci.h"
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#endif
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struct musb_register_map {
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char *name;
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unsigned offset;
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unsigned size;
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};
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static const struct musb_register_map musb_regmap[] = {
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{ "FAddr", 0x00, 8 },
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{ "Power", 0x01, 8 },
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{ "Frame", 0x0c, 16 },
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{ "Index", 0x0e, 8 },
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{ "Testmode", 0x0f, 8 },
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{ "TxMaxPp", 0x10, 16 },
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{ "TxCSRp", 0x12, 16 },
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{ "RxMaxPp", 0x14, 16 },
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{ "RxCSR", 0x16, 16 },
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{ "RxCount", 0x18, 16 },
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{ "ConfigData", 0x1f, 8 },
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{ "DevCtl", 0x60, 8 },
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{ "MISC", 0x61, 8 },
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{ "TxFIFOsz", 0x62, 8 },
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{ "RxFIFOsz", 0x63, 8 },
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{ "TxFIFOadd", 0x64, 16 },
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{ "RxFIFOadd", 0x66, 16 },
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{ "VControl", 0x68, 32 },
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{ "HWVers", 0x6C, 16 },
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{ "EPInfo", 0x78, 8 },
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{ "RAMInfo", 0x79, 8 },
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{ "LinkInfo", 0x7A, 8 },
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{ "VPLen", 0x7B, 8 },
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{ "HS_EOF1", 0x7C, 8 },
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{ "FS_EOF1", 0x7D, 8 },
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{ "LS_EOF1", 0x7E, 8 },
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{ "SOFT_RST", 0x7F, 8 },
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{ "DMA_CNTLch0", 0x204, 16 },
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{ "DMA_ADDRch0", 0x208, 16 },
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{ "DMA_COUNTch0", 0x20C, 16 },
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{ "DMA_CNTLch1", 0x214, 16 },
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{ "DMA_ADDRch1", 0x218, 16 },
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{ "DMA_COUNTch1", 0x21C, 16 },
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{ "DMA_CNTLch2", 0x224, 16 },
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{ "DMA_ADDRch2", 0x228, 16 },
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{ "DMA_COUNTch2", 0x22C, 16 },
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{ "DMA_CNTLch3", 0x234, 16 },
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{ "DMA_ADDRch3", 0x238, 16 },
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{ "DMA_COUNTch3", 0x23C, 16 },
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{ "DMA_CNTLch4", 0x244, 16 },
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{ "DMA_ADDRch4", 0x248, 16 },
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{ "DMA_COUNTch4", 0x24C, 16 },
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{ "DMA_CNTLch5", 0x254, 16 },
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{ "DMA_ADDRch5", 0x258, 16 },
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{ "DMA_COUNTch5", 0x25C, 16 },
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{ "DMA_CNTLch6", 0x264, 16 },
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{ "DMA_ADDRch6", 0x268, 16 },
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{ "DMA_COUNTch6", 0x26C, 16 },
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{ "DMA_CNTLch7", 0x274, 16 },
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{ "DMA_ADDRch7", 0x278, 16 },
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{ "DMA_COUNTch7", 0x27C, 16 },
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{ } /* Terminating Entry */
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};
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static struct dentry *musb_debugfs_root;
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static int musb_regdump_show(struct seq_file *s, void *unused)
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{
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struct musb *musb = s->private;
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unsigned i;
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seq_printf(s, "MUSB (M)HDRC Register Dump\n");
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for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
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switch (musb_regmap[i].size) {
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case 8:
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seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
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musb_readb(musb->mregs, musb_regmap[i].offset));
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break;
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case 16:
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seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
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musb_readw(musb->mregs, musb_regmap[i].offset));
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break;
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case 32:
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seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
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musb_readl(musb->mregs, musb_regmap[i].offset));
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break;
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}
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}
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return 0;
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}
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static int musb_regdump_open(struct inode *inode, struct file *file)
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{
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return single_open(file, musb_regdump_show, inode->i_private);
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}
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static int musb_test_mode_show(struct seq_file *s, void *unused)
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{
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struct musb *musb = s->private;
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unsigned test;
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test = musb_readb(musb->mregs, MUSB_TESTMODE);
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if (test & MUSB_TEST_FORCE_HOST)
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seq_printf(s, "force host\n");
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if (test & MUSB_TEST_FIFO_ACCESS)
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seq_printf(s, "fifo access\n");
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if (test & MUSB_TEST_FORCE_FS)
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seq_printf(s, "force full-speed\n");
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if (test & MUSB_TEST_FORCE_HS)
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seq_printf(s, "force high-speed\n");
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if (test & MUSB_TEST_PACKET)
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seq_printf(s, "test packet\n");
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if (test & MUSB_TEST_K)
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seq_printf(s, "test K\n");
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if (test & MUSB_TEST_J)
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seq_printf(s, "test J\n");
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if (test & MUSB_TEST_SE0_NAK)
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seq_printf(s, "test SE0 NAK\n");
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return 0;
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}
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static const struct file_operations musb_regdump_fops = {
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.open = musb_regdump_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int musb_test_mode_open(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return single_open(file, musb_test_mode_show, inode->i_private);
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}
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static ssize_t musb_test_mode_write(struct file *file,
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const char __user *ubuf, size_t count, loff_t *ppos)
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{
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struct musb *musb = file->private_data;
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u8 test = 0;
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char buf[18];
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memset(buf, 0x00, sizeof(buf));
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if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
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return -EFAULT;
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if (!strncmp(buf, "force host", 9))
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test = MUSB_TEST_FORCE_HOST;
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if (!strncmp(buf, "fifo access", 11))
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test = MUSB_TEST_FIFO_ACCESS;
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if (!strncmp(buf, "force full-speed", 15))
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test = MUSB_TEST_FORCE_FS;
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if (!strncmp(buf, "force high-speed", 15))
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test = MUSB_TEST_FORCE_HS;
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if (!strncmp(buf, "test packet", 10)) {
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test = MUSB_TEST_PACKET;
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musb_load_testpacket(musb);
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}
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if (!strncmp(buf, "test K", 6))
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test = MUSB_TEST_K;
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if (!strncmp(buf, "test J", 6))
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test = MUSB_TEST_J;
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if (!strncmp(buf, "test SE0 NAK", 12))
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test = MUSB_TEST_SE0_NAK;
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musb_writeb(musb->mregs, MUSB_TESTMODE, test);
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return count;
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}
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static const struct file_operations musb_test_mode_fops = {
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.open = musb_test_mode_open,
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.write = musb_test_mode_write,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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int __init musb_init_debugfs(struct musb *musb)
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{
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struct dentry *root;
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struct dentry *file;
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int ret;
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root = debugfs_create_dir("musb", NULL);
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if (IS_ERR(root)) {
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ret = PTR_ERR(root);
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goto err0;
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}
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file = debugfs_create_file("regdump", S_IRUGO, root, musb,
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&musb_regdump_fops);
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if (IS_ERR(file)) {
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ret = PTR_ERR(file);
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goto err1;
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}
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file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
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root, musb, &musb_test_mode_fops);
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if (IS_ERR(file)) {
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ret = PTR_ERR(file);
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goto err1;
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}
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musb_debugfs_root = root;
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return 0;
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err1:
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debugfs_remove_recursive(root);
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err0:
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return ret;
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}
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void __exit musb_exit_debugfs(struct musb *musb)
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{
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debugfs_remove_recursive(musb_debugfs_root);
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}
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