From c4a8b6392a3f131259aa2392cfc6bb6d0ca549f9 Mon Sep 17 00:00:00 2001 From: Li Jun Date: Wed, 23 Apr 2014 15:56:40 +0800 Subject: [PATCH] usb: chipidea: debug: add debug file for controller registers dump This patch adds below registers dump for debug: - USBINTR - USBSTS - USBMODE - USBCMD - PORTSC - OTGSC Signed-off-by: Peter Chen Acked-by: Peter Chen Signed-off-by: Li Jun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/debug.c | 51 ++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index 96d899aee473..5b890c1e69e0 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -12,6 +12,7 @@ #include "udc.h" #include "bits.h" #include "debug.h" +#include "otg.h" /** * ci_device_show: prints information about device capabilities and status @@ -253,6 +254,50 @@ static const struct file_operations ci_role_fops = { .release = single_release, }; +int ci_registers_show(struct seq_file *s, void *unused) +{ + struct ci_hdrc *ci = s->private; + u32 tmp_reg; + + if (!ci) + return 0; + + /* ------ Registers ----- */ + tmp_reg = hw_read_intr_enable(ci); + seq_printf(s, "USBINTR reg: %08x\n", tmp_reg); + + tmp_reg = hw_read_intr_status(ci); + seq_printf(s, "USBSTS reg: %08x\n", tmp_reg); + + tmp_reg = hw_read(ci, OP_USBMODE, ~0); + seq_printf(s, "USBMODE reg: %08x\n", tmp_reg); + + tmp_reg = hw_read(ci, OP_USBCMD, ~0); + seq_printf(s, "USBCMD reg: %08x\n", tmp_reg); + + tmp_reg = hw_read(ci, OP_PORTSC, ~0); + seq_printf(s, "PORTSC reg: %08x\n", tmp_reg); + + if (ci->is_otg) { + tmp_reg = hw_read_otgsc(ci, ~0); + seq_printf(s, "OTGSC reg: %08x\n", tmp_reg); + } + + return 0; +} + +static int ci_registers_open(struct inode *inode, struct file *file) +{ + return single_open(file, ci_registers_show, inode->i_private); +} + +static const struct file_operations ci_registers_fops = { + .open = ci_registers_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + /** * dbg_create_files: initializes the attribute interface * @ci: device @@ -289,6 +334,12 @@ int dbg_create_files(struct ci_hdrc *ci) dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci, &ci_role_fops); + if (!dent) + goto err; + + dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci, + &ci_registers_fops); + if (dent) return 0; err: -- 2.39.5