From 0849588a5b0f32b71b01aae1eeebfa88ebbcceb9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ond=C5=99ej=20Jirman?= Date: Sun, 7 Nov 2021 19:29:06 +0100 Subject: [PATCH 330/480] usb: typec: fusb302: Extend debugging interface with driver state dumps This is useful for debugging. Signed-off-by: Ondrej Jirman --- drivers/usb/typec/tcpm/fusb302.c | 78 ++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c index 53fa863dfa96..2ee7222e531a 100644 --- a/drivers/usb/typec/tcpm/fusb302.c +++ b/drivers/usb/typec/tcpm/fusb302.c @@ -208,6 +208,81 @@ static int fusb302_debug_show(struct seq_file *s, void *v) } DEFINE_SHOW_ATTRIBUTE(fusb302_debug); +static const char * const typec_cc_status_name[]; +static const char * const cc_polarity_name[]; +static const char * const toggling_mode_name[] = { + [TOGGLING_MODE_OFF] = "Off", + [TOGGLING_MODE_DRP] = "DRP", + [TOGGLING_MODE_SNK] = "SNK", + [TOGGLING_MODE_SRC] = "SRC", +}; +static const char * const src_current_status_name[] = { + [SRC_CURRENT_DEFAULT] = "Default", + [SRC_CURRENT_MEDIUM] = "Medium", + [SRC_CURRENT_HIGH] = "High", +}; + +#define FUSB_REG(n) { n, #n }, +struct fusb_reg { + u8 addr; + const char* name; +} fusb_regs[] = { + FUSB_REG(FUSB_REG_DEVICE_ID) + FUSB_REG(FUSB_REG_SWITCHES0) + FUSB_REG(FUSB_REG_SWITCHES1) + FUSB_REG(FUSB_REG_MEASURE) + FUSB_REG(FUSB_REG_CONTROL0) + FUSB_REG(FUSB_REG_CONTROL1) + FUSB_REG(FUSB_REG_CONTROL2) + FUSB_REG(FUSB_REG_CONTROL3) + FUSB_REG(FUSB_REG_MASK) + FUSB_REG(FUSB_REG_POWER) + FUSB_REG(FUSB_REG_RESET) + FUSB_REG(FUSB_REG_MASKA) + FUSB_REG(FUSB_REG_MASKB) + FUSB_REG(FUSB_REG_STATUS0A) + FUSB_REG(FUSB_REG_STATUS1A) + FUSB_REG(FUSB_REG_INTERRUPTA) + FUSB_REG(FUSB_REG_INTERRUPTB) + FUSB_REG(FUSB_REG_STATUS0) + FUSB_REG(FUSB_REG_STATUS1) + FUSB_REG(FUSB_REG_INTERRUPT) +}; + +static int fusb302_i2c_read(struct fusb302_chip *chip, + u8 address, u8 *data); + +static int fusb302_debug_regs_show(struct seq_file *s, void *v) +{ + struct fusb302_chip *chip = (struct fusb302_chip *)s->private; + int i, ret; + + seq_printf(s, "chip->intr_togdone = %d\n", chip->intr_togdone); + seq_printf(s, "chip->intr_bc_lvl = %d\n", chip->intr_bc_lvl); + seq_printf(s, "chip->intr_comp_chng = %d\n", chip->intr_comp_chng); + seq_printf(s, "chip->vconn_on = %d\n", chip->vconn_on); + seq_printf(s, "chip->vbus_on = %d\n", chip->vbus_on); + seq_printf(s, "chip->charge_on = %d\n", chip->charge_on); + seq_printf(s, "chip->vbus_present = %d\n", chip->vbus_present); + seq_printf(s, "chip->cc_polarity = %s\n", cc_polarity_name[chip->cc_polarity]); + seq_printf(s, "chip->cc1 = %s\n", typec_cc_status_name[chip->cc1]); + seq_printf(s, "chip->cc2 = %s\n", typec_cc_status_name[chip->cc2]); + seq_printf(s, "chip->toggling_mode = %s\n", toggling_mode_name[chip->toggling_mode]); + seq_printf(s, "chip->src_current_status = %s\n", src_current_status_name[chip->src_current_status]); + + seq_printf(s, "\nRegisters:\n"); + for (i = 0; i < ARRAY_SIZE(fusb_regs); i++) { + u8 val = 0; + + ret = fusb302_i2c_read(chip, fusb_regs[i].addr, &val); + if (ret >= 0) + seq_printf(s, "%s = %02hhx\n", fusb_regs[i].name, val); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(fusb302_debug_regs); + static void fusb302_debugfs_init(struct fusb302_chip *chip) { char name[NAME_MAX]; @@ -217,6 +292,9 @@ static void fusb302_debugfs_init(struct fusb302_chip *chip) chip->dentry = debugfs_create_dir(name, usb_debug_root); debugfs_create_file("log", S_IFREG | 0444, chip->dentry, chip, &fusb302_debug_fops); + + debugfs_create_file("regs", S_IFREG | 0444, chip->dentry, chip, + &fusb302_debug_regs_fops); } static void fusb302_debugfs_exit(struct fusb302_chip *chip) -- 2.49.0