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path: root/drivers/omap_hsi/hsi_driver_debugfs.c
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Diffstat (limited to 'drivers/omap_hsi/hsi_driver_debugfs.c')
-rw-r--r--drivers/omap_hsi/hsi_driver_debugfs.c500
1 files changed, 500 insertions, 0 deletions
diff --git a/drivers/omap_hsi/hsi_driver_debugfs.c b/drivers/omap_hsi/hsi_driver_debugfs.c
new file mode 100644
index 0000000..d1f32dd
--- /dev/null
+++ b/drivers/omap_hsi/hsi_driver_debugfs.c
@@ -0,0 +1,500 @@
+/*
+ * hsi_driver_debugfs.c
+ *
+ * Implements HSI debugfs.
+ *
+ * Copyright (C) 2007-2008 Nokia Corporation. All rights reserved.
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author: Carlos Chinea <carlos.chinea@nokia.com>
+ * Author: Sebastien JAN <s-jan@ti.com>
+ *
+ * This package is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/uaccess.h>
+#include <linux/ctype.h>
+#include "hsi_driver.h"
+
+#define HSI_DIR_NAME_SIZE 64
+
+static struct dentry *hsi_dir;
+
+static int hsi_debug_show(struct seq_file *m, void *p)
+{
+ struct hsi_dev *hsi_ctrl = m->private;
+ struct platform_device *pdev = to_platform_device(hsi_ctrl->dev);
+
+ hsi_clocks_enable(hsi_ctrl->dev, __func__);
+
+ seq_printf(m, "REVISION\t: 0x%08x\n",
+ hsi_inl(hsi_ctrl->base, HSI_SYS_REVISION_REG));
+ if (hsi_driver_device_is_hsi(pdev))
+ seq_printf(m, "HWINFO\t\t: 0x%08x\n",
+ hsi_inl(hsi_ctrl->base, HSI_SYS_HWINFO_REG));
+ seq_printf(m, "SYSCONFIG\t: 0x%08x\n",
+ hsi_inl(hsi_ctrl->base, HSI_SYS_SYSCONFIG_REG));
+ seq_printf(m, "SYSSTATUS\t: 0x%08x\n",
+ hsi_inl(hsi_ctrl->base, HSI_SYS_SYSSTATUS_REG));
+
+ hsi_clocks_disable(hsi_ctrl->dev, __func__);
+
+ return 0;
+}
+
+static int hsi_debug_port_show(struct seq_file *m, void *p)
+{
+ struct hsi_port *hsi_port = m->private;
+ struct hsi_dev *hsi_ctrl = hsi_port->hsi_controller;
+ void __iomem *base = hsi_ctrl->base;
+ unsigned int port = hsi_port->port_number;
+ int ch, fifo;
+ long buff_offset;
+ struct platform_device *pdev = to_platform_device(hsi_ctrl->dev);
+
+ hsi_clocks_enable(hsi_ctrl->dev, __func__);
+
+ if (hsi_port->cawake_gpio >= 0)
+ seq_printf(m, "CAWAKE\t\t: %d\n", hsi_get_cawake(hsi_port));
+
+ seq_printf(m, "WAKE\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_SYS_WAKE_REG(port)));
+ seq_printf(m, "MPU_ENABLE_IRQ%d\t: 0x%08x\n", hsi_port->n_irq,
+ hsi_inl(base,
+ HSI_SYS_MPU_ENABLE_REG(port, hsi_port->n_irq)));
+ seq_printf(m, "MPU_STATUS_IRQ%d\t: 0x%08x\n", hsi_port->n_irq,
+ hsi_inl(base,
+ HSI_SYS_MPU_STATUS_REG(port, hsi_port->n_irq)));
+ if (hsi_driver_device_is_hsi(pdev)) {
+ seq_printf(m, "MPU_U_ENABLE_IRQ%d\t: 0x%08x\n",
+ hsi_port->n_irq,
+ hsi_inl(base, HSI_SYS_MPU_U_ENABLE_REG(port,
+ hsi_port->n_irq)));
+ seq_printf(m, "MPU_U_STATUS_IRQ%d\t: 0x%08x\n", hsi_port->n_irq,
+ hsi_inl(base,
+ HSI_SYS_MPU_U_STATUS_REG(port,
+ hsi_port->n_irq)));
+ }
+ /* HST */
+ seq_printf(m, "\nHST\n===\n");
+ seq_printf(m, "MODE\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_MODE_REG(port)));
+ seq_printf(m, "FRAMESIZE\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_FRAMESIZE_REG(port)));
+ seq_printf(m, "DIVISOR\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_DIVISOR_REG(port)));
+ seq_printf(m, "CHANNELS\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_CHANNELS_REG(port)));
+ seq_printf(m, "ARBMODE\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_ARBMODE_REG(port)));
+ seq_printf(m, "TXSTATE\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_TXSTATE_REG(port)));
+ if (hsi_driver_device_is_hsi(pdev)) {
+ seq_printf(m, "BUFSTATE P1\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_BUFSTATE_REG(1)));
+ seq_printf(m, "BUFSTATE P2\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_BUFSTATE_REG(2)));
+ } else {
+ seq_printf(m, "BUFSTATE\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_BUFSTATE_REG(port)));
+ }
+ seq_printf(m, "BREAK\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HST_BREAK_REG(port)));
+ for (ch = 0; ch < 8; ch++) {
+ buff_offset = hsi_hst_buffer_reg(hsi_ctrl, port, ch);
+ if (buff_offset >= 0)
+ seq_printf(m, "BUFFER_CH%d\t: 0x%08x\n", ch,
+ hsi_inl(base, buff_offset));
+ }
+ if (hsi_driver_device_is_hsi(pdev)) {
+ for (fifo = 0; fifo < HSI_HST_FIFO_COUNT; fifo++) {
+ seq_printf(m, "FIFO MAPPING%d\t: 0x%08x\n", fifo,
+ hsi_inl(base,
+ HSI_HST_MAPPING_FIFO_REG(fifo)));
+ }
+ }
+ /* HSR */
+ seq_printf(m, "\nHSR\n===\n");
+ seq_printf(m, "MODE\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_MODE_REG(port)));
+ seq_printf(m, "FRAMESIZE\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_FRAMESIZE_REG(port)));
+ seq_printf(m, "CHANNELS\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_CHANNELS_REG(port)));
+ seq_printf(m, "COUNTERS\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_COUNTERS_REG(port)));
+ seq_printf(m, "RXSTATE\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_RXSTATE_REG(port)));
+ if (hsi_driver_device_is_hsi(pdev)) {
+ seq_printf(m, "BUFSTATE P1\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_BUFSTATE_REG(1)));
+ seq_printf(m, "BUFSTATE P2\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_BUFSTATE_REG(2)));
+ } else {
+ seq_printf(m, "BUFSTATE\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_BUFSTATE_REG(port)));
+ }
+ seq_printf(m, "BREAK\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_BREAK_REG(port)));
+ seq_printf(m, "ERROR\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_ERROR_REG(port)));
+ seq_printf(m, "ERRORACK\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_ERRORACK_REG(port)));
+ for (ch = 0; ch < 8; ch++) {
+ buff_offset = hsi_hsr_buffer_reg(hsi_ctrl, port, ch);
+ if (buff_offset >= 0)
+ seq_printf(m, "BUFFER_CH%d\t: 0x%08x\n", ch,
+ hsi_inl(base, buff_offset));
+ }
+ if (hsi_driver_device_is_hsi(pdev)) {
+ for (fifo = 0; fifo < HSI_HSR_FIFO_COUNT; fifo++) {
+ seq_printf(m, "FIFO MAPPING%d\t: 0x%08x\n", fifo,
+ hsi_inl(base,
+ HSI_HSR_MAPPING_FIFO_REG(fifo)));
+ }
+ seq_printf(m, "DLL\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_DLL_REG));
+ seq_printf(m, "DIVISOR\t: 0x%08x\n",
+ hsi_inl(base, HSI_HSR_DIVISOR_REG(port)));
+ }
+
+ hsi_clocks_disable(hsi_ctrl->dev, __func__);
+
+ return 0;
+}
+
+static int hsi_debug_gdd_show(struct seq_file *m, void *p)
+{
+ struct hsi_dev *hsi_ctrl = m->private;
+ void __iomem *base = hsi_ctrl->base;
+ int lch;
+ struct platform_device *pdev = to_platform_device(hsi_ctrl->dev);
+
+ hsi_clocks_enable(hsi_ctrl->dev, __func__);
+
+ seq_printf(m, "GDD_MPU_STATUS\t: 0x%08x\n",
+ hsi_inl(base, HSI_SYS_GDD_MPU_IRQ_STATUS_REG));
+ seq_printf(m, "GDD_MPU_ENABLE\t: 0x%08x\n\n",
+ hsi_inl(base, HSI_SYS_GDD_MPU_IRQ_ENABLE_REG));
+
+ if (!hsi_driver_device_is_hsi(pdev)) {
+ seq_printf(m, "HW_ID\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_SSI_GDD_HW_ID_REG));
+ seq_printf(m, "PPORT_ID\t: 0x%08x\n",
+ hsi_inl(base, HSI_SSI_GDD_PPORT_ID_REG));
+ seq_printf(m, "MPORT_ID\t: 0x%08x\n",
+ hsi_inl(base, HSI_SSI_GDD_MPORT_ID_REG));
+ seq_printf(m, "TEST\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_SSI_GDD_TEST_REG));
+ }
+
+ seq_printf(m, "GCR\t\t: 0x%08x\n", hsi_inl(base, HSI_GDD_GCR_REG));
+
+ for (lch = 0; lch < hsi_ctrl->gdd_chan_count; lch++) {
+ seq_printf(m, "\nGDD LCH %d\n=========\n", lch);
+ seq_printf(m, "CSDP\t\t: 0x%04x\n",
+ hsi_inw(base, HSI_GDD_CSDP_REG(lch)));
+ seq_printf(m, "CCR\t\t: 0x%04x\n",
+ hsi_inw(base, HSI_GDD_CCR_REG(lch)));
+ seq_printf(m, "CICR\t\t: 0x%04x\n",
+ hsi_inw(base, HSI_GDD_CCIR_REG(lch)));
+ seq_printf(m, "CSR\t\t: 0x%04x\n",
+ hsi_inw(base, HSI_GDD_CSR_REG(lch)));
+ seq_printf(m, "CSSA\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_GDD_CSSA_REG(lch)));
+ seq_printf(m, "CDSA\t\t: 0x%08x\n",
+ hsi_inl(base, HSI_GDD_CDSA_REG(lch)));
+ seq_printf(m, "CEN\t\t: 0x%04x\n",
+ hsi_inw(base, HSI_GDD_CEN_REG(lch)));
+ seq_printf(m, "CSAC\t\t: 0x%04x\n",
+ hsi_inw(base, HSI_GDD_CSAC_REG(lch)));
+ seq_printf(m, "CDAC\t\t: 0x%04x\n",
+ hsi_inw(base, HSI_GDD_CDAC_REG(lch)));
+ if (!hsi_driver_device_is_hsi(pdev))
+ seq_printf(m, "CLNK_CTRL\t: 0x%04x\n",
+ hsi_inw(base,
+ HSI_SSI_GDD_CLNK_CTRL_REG(lch)));
+ }
+
+ hsi_clocks_disable(hsi_ctrl->dev, __func__);
+
+ return 0;
+}
+
+static int hsi_port_counters_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static int hsi_port_counters_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static loff_t hsi_port_counters_seek(struct file *file, loff_t off, int whence)
+{
+ return 0;
+}
+
+static ssize_t hsi_port_counters_read(struct file *filep, char __user * buff,
+ size_t count, loff_t *offp)
+{
+ ssize_t ret;
+ struct hsi_port *hsi_port = filep->private_data;
+ struct hsi_dev *hsi_ctrl = hsi_port->hsi_controller;
+ void __iomem *base = hsi_ctrl->base;
+ unsigned int port = hsi_port->port_number;
+ struct platform_device *pdev = to_platform_device(hsi_ctrl->dev);
+ char str[50];
+ unsigned long reg;
+
+ if (*offp > 0) {
+ ret = 0;
+ goto hsi_cnt_rd_bk;
+ }
+
+ hsi_clocks_enable(hsi_ctrl->dev, __func__);
+
+ reg = hsi_inl(base, HSI_HSR_COUNTERS_REG(port));
+
+ hsi_clocks_disable(hsi_ctrl->dev, __func__);
+
+ if (hsi_driver_device_is_hsi(pdev)) {
+ sprintf(str, "FT:%d, TB:%d, FB:%d\n",
+ (int)(reg & HSI_COUNTERS_FT_MASK) >>
+ HSI_COUNTERS_FT_OFFSET,
+ (int)(reg & HSI_COUNTERS_TB_MASK) >>
+ HSI_COUNTERS_TB_OFFSET,
+ (int)(reg & HSI_COUNTERS_FB_MASK) >>
+ HSI_COUNTERS_FB_OFFSET);
+ } else {
+ sprintf(str, "timeout:%d\n", (int)reg);
+ }
+
+ ret = strlen(str);
+ if (copy_to_user((void __user *)buff, str, ret)) {
+ dev_err(hsi_ctrl->dev, "copy_to_user failed\n");
+ ret = 0;
+ } else {
+ *offp = ret;
+ }
+
+hsi_cnt_rd_bk:
+ return ret;
+}
+
+/*
+ * Split the buffer `buf' into space-separated words.
+ * Return the number of words or <0 on error.
+ */
+static int hsi_debug_tokenize(char *buf, char *words[], int maxwords)
+{
+ int nwords = 0;
+
+ while (*buf) {
+ char *end;
+
+ /* Skip leading whitespace */
+ while (*buf && isspace(*buf))
+ buf++;
+ if (!*buf)
+ break; /* oh, it was trailing whitespace */
+
+ /* Run `end' over a word */
+ for (end = buf; *end && !isspace(*end); end++)
+ ;
+ /* `buf' is the start of the word, `end' is one past the end */
+
+ if (nwords == maxwords)
+ return -EINVAL; /* ran out of words[] before bytes */
+ if (*end)
+ *end++ = '\0'; /* terminate the word */
+ words[nwords++] = buf;
+ buf = end;
+ }
+ return nwords;
+}
+
+static ssize_t hsi_port_counters_write(struct file *filep,
+ const char __user *buff, size_t count,
+ loff_t *offp)
+{
+ ssize_t ret;
+ struct hsi_port *hsi_port = filep->private_data;
+ struct hsi_dev *hsi_ctrl = hsi_port->hsi_controller;
+ void __iomem *base = hsi_ctrl->base;
+ unsigned int port = hsi_port->port_number;
+ struct platform_device *pdev = to_platform_device(hsi_ctrl->dev);
+#define MAXWORDS 4
+ int nwords;
+ char *words[MAXWORDS];
+ char tmpbuf[256];
+ unsigned long reg, ft, tb, fb;
+
+ if (count == 0)
+ return 0;
+ if (count > sizeof(tmpbuf) - 1)
+ return -E2BIG;
+ if (copy_from_user(tmpbuf, buff, count))
+ return -EFAULT;
+ tmpbuf[count] = '\0';
+ dev_dbg(hsi_ctrl->dev, "%s: read %d bytes from userspace\n",
+ __func__, (int)count);
+
+ nwords = hsi_debug_tokenize(tmpbuf, words, MAXWORDS);
+ if (nwords < 0) {
+ dev_warn(hsi_ctrl->dev,
+ "HSI counters write usage: echo <values> > counters\n");
+ return -EINVAL;
+ }
+
+ hsi_clocks_enable(hsi_ctrl->dev, __func__);
+
+ if (hsi_driver_device_is_hsi(pdev)) {
+ if (nwords != 3) {
+ dev_warn(hsi_ctrl->dev, "HSI counters write usage: "
+ "echo \"FT TB FB\" > counters\n");
+ ret = -EINVAL;
+ goto hsi_cnt_w_bk1;
+ }
+ strict_strtoul(words[0], 0, &ft);
+ strict_strtoul(words[1], 0, &tb);
+ strict_strtoul(words[2], 0, &fb);
+ reg = ((ft << HSI_COUNTERS_FT_OFFSET & HSI_COUNTERS_FT_MASK) |
+ (tb << HSI_COUNTERS_TB_OFFSET & HSI_COUNTERS_TB_MASK) |
+ (fb << HSI_COUNTERS_FB_OFFSET & HSI_COUNTERS_FB_MASK));
+ } else {
+ if (nwords != 1) {
+ dev_warn(hsi_ctrl->dev, "HSI counters write usage: "
+ "echo \"timeout\" > counters\n");
+ ret = -EINVAL;
+ goto hsi_cnt_w_bk1;
+ }
+ strict_strtoul(words[0], 0, &reg);
+ }
+ hsi_outl(reg, base, HSI_HSR_COUNTERS_REG(port));
+ ret = count;
+ *offp += count;
+
+hsi_cnt_w_bk1:
+
+ hsi_clocks_disable(hsi_ctrl->dev, __func__);
+
+ return ret;
+}
+
+static int hsi_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, hsi_debug_show, inode->i_private);
+}
+
+static int hsi_port_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, hsi_debug_port_show, inode->i_private);
+}
+
+static int hsi_gdd_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, hsi_debug_gdd_show, inode->i_private);
+}
+
+static const struct file_operations hsi_regs_fops = {
+ .open = hsi_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations hsi_port_regs_fops = {
+ .open = hsi_port_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations hsi_port_counters_fops = {
+ .open = hsi_port_counters_open,
+ .read = hsi_port_counters_read,
+ .write = hsi_port_counters_write,
+ .llseek = hsi_port_counters_seek,
+ .release = hsi_port_counters_release,
+};
+
+static const struct file_operations hsi_gdd_regs_fops = {
+ .open = hsi_gdd_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+int __init hsi_debug_add_ctrl(struct hsi_dev *hsi_ctrl)
+{
+ struct platform_device *pdev = to_platform_device(hsi_ctrl->dev);
+ unsigned char dir_name[HSI_DIR_NAME_SIZE];
+ struct dentry *dir;
+ unsigned int port;
+
+ if (pdev->id < 0) {
+ hsi_ctrl->dir = debugfs_create_dir(pdev->name, hsi_dir);
+ } else {
+ snprintf(dir_name, sizeof(dir_name), "%s%d", pdev->name,
+ pdev->id);
+ hsi_ctrl->dir = debugfs_create_dir(dir_name, hsi_dir);
+ }
+ if (IS_ERR(hsi_ctrl->dir))
+ return PTR_ERR(hsi_ctrl->dir);
+
+ debugfs_create_file("regs", S_IRUGO, hsi_ctrl->dir, hsi_ctrl,
+ &hsi_regs_fops);
+
+ for (port = 0; port < hsi_ctrl->max_p; port++) {
+ snprintf(dir_name, sizeof(dir_name), "port%d", port + 1);
+ dir = debugfs_create_dir(dir_name, hsi_ctrl->dir);
+ if (IS_ERR(dir))
+ goto rback;
+ debugfs_create_file("regs", S_IRUGO, dir,
+ &hsi_ctrl->hsi_port[port],
+ &hsi_port_regs_fops);
+ debugfs_create_file("counters", S_IRUGO | S_IWUGO, dir,
+ &hsi_ctrl->hsi_port[port],
+ &hsi_port_counters_fops);
+ }
+
+ dir = debugfs_create_dir("gdd", hsi_ctrl->dir);
+ if (IS_ERR(dir))
+ goto rback;
+ debugfs_create_file("regs", S_IRUGO, dir, hsi_ctrl, &hsi_gdd_regs_fops);
+
+ return 0;
+rback:
+ debugfs_remove_recursive(hsi_ctrl->dir);
+ return PTR_ERR(dir);
+}
+
+void hsi_debug_remove_ctrl(struct hsi_dev *hsi_ctrl)
+{
+ debugfs_remove_recursive(hsi_ctrl->dir);
+}
+
+int __init hsi_debug_init(void)
+{
+ hsi_dir = debugfs_create_dir("hsi", NULL);
+ if (IS_ERR(hsi_dir))
+ return PTR_ERR(hsi_dir);
+
+ return 0;
+}
+
+void hsi_debug_exit(void)
+{
+ debugfs_remove_recursive(hsi_dir);
+}
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