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a61b75d108
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Acked-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
375 lines
9.2 KiB
C
375 lines
9.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb/phy.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/otg-fsm.h>
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#include <linux/usb/chipidea.h>
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#include "ci.h"
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#include "udc.h"
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#include "bits.h"
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#include "otg.h"
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/**
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* ci_device_show: prints information about device capabilities and status
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*/
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static int ci_device_show(struct seq_file *s, void *data)
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{
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struct ci_hdrc *ci = s->private;
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struct usb_gadget *gadget = &ci->gadget;
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seq_printf(s, "speed = %d\n", gadget->speed);
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seq_printf(s, "max_speed = %d\n", gadget->max_speed);
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seq_printf(s, "is_otg = %d\n", gadget->is_otg);
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seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral);
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seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable);
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seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support);
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seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support);
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seq_printf(s, "name = %s\n",
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(gadget->name ? gadget->name : ""));
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if (!ci->driver)
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return 0;
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seq_printf(s, "gadget function = %s\n",
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(ci->driver->function ? ci->driver->function : ""));
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seq_printf(s, "gadget max speed = %d\n", ci->driver->max_speed);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ci_device);
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/**
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* ci_port_test_show: reads port test mode
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*/
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static int ci_port_test_show(struct seq_file *s, void *data)
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{
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struct ci_hdrc *ci = s->private;
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unsigned long flags;
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unsigned mode;
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pm_runtime_get_sync(ci->dev);
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spin_lock_irqsave(&ci->lock, flags);
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mode = hw_port_test_get(ci);
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spin_unlock_irqrestore(&ci->lock, flags);
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pm_runtime_put_sync(ci->dev);
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seq_printf(s, "mode = %u\n", mode);
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return 0;
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}
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/**
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* ci_port_test_write: writes port test mode
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*/
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static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *s = file->private_data;
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struct ci_hdrc *ci = s->private;
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unsigned long flags;
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unsigned mode;
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char buf[32];
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int ret;
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count = min_t(size_t, sizeof(buf) - 1, count);
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if (copy_from_user(buf, ubuf, count))
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return -EFAULT;
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/* sscanf requires a zero terminated string */
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buf[count] = '\0';
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if (sscanf(buf, "%u", &mode) != 1)
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return -EINVAL;
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if (mode > 255)
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return -EBADRQC;
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pm_runtime_get_sync(ci->dev);
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spin_lock_irqsave(&ci->lock, flags);
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ret = hw_port_test_set(ci, mode);
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spin_unlock_irqrestore(&ci->lock, flags);
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pm_runtime_put_sync(ci->dev);
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return ret ? ret : count;
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}
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static int ci_port_test_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ci_port_test_show, inode->i_private);
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}
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static const struct file_operations ci_port_test_fops = {
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.open = ci_port_test_open,
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.write = ci_port_test_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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/**
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* ci_qheads_show: DMA contents of all queue heads
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*/
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static int ci_qheads_show(struct seq_file *s, void *data)
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{
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struct ci_hdrc *ci = s->private;
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unsigned long flags;
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unsigned i, j;
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if (ci->role != CI_ROLE_GADGET) {
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seq_printf(s, "not in gadget mode\n");
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return 0;
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}
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spin_lock_irqsave(&ci->lock, flags);
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for (i = 0; i < ci->hw_ep_max/2; i++) {
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struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i];
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struct ci_hw_ep *hweptx =
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&ci->ci_hw_ep[i + ci->hw_ep_max/2];
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seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n",
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i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma);
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for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++)
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seq_printf(s, " %04X: %08X %08X\n", j,
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*((u32 *)hweprx->qh.ptr + j),
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*((u32 *)hweptx->qh.ptr + j));
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}
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spin_unlock_irqrestore(&ci->lock, flags);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ci_qheads);
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/**
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* ci_requests_show: DMA contents of all requests currently queued (all endpts)
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*/
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static int ci_requests_show(struct seq_file *s, void *data)
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{
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struct ci_hdrc *ci = s->private;
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unsigned long flags;
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struct ci_hw_req *req = NULL;
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struct td_node *node, *tmpnode;
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unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);
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if (ci->role != CI_ROLE_GADGET) {
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seq_printf(s, "not in gadget mode\n");
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return 0;
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}
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spin_lock_irqsave(&ci->lock, flags);
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for (i = 0; i < ci->hw_ep_max; i++)
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list_for_each_entry(req, &ci->ci_hw_ep[i].qh.queue, queue) {
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list_for_each_entry_safe(node, tmpnode, &req->tds, td) {
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seq_printf(s, "EP=%02i: TD=%08X %s\n",
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i % (ci->hw_ep_max / 2),
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(u32)node->dma,
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((i < ci->hw_ep_max/2) ?
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"RX" : "TX"));
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for (j = 0; j < qsize; j++)
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seq_printf(s, " %04X: %08X\n", j,
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*((u32 *)node->ptr + j));
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}
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}
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spin_unlock_irqrestore(&ci->lock, flags);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ci_requests);
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static int ci_otg_show(struct seq_file *s, void *unused)
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{
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struct ci_hdrc *ci = s->private;
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struct otg_fsm *fsm;
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if (!ci || !ci_otg_is_fsm_mode(ci))
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return 0;
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fsm = &ci->fsm;
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/* ------ State ----- */
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seq_printf(s, "OTG state: %s\n\n",
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usb_otg_state_string(ci->otg.state));
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/* ------ State Machine Variables ----- */
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seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);
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seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);
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seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);
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seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);
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seq_printf(s, "b_conn: %d\n", fsm->b_conn);
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seq_printf(s, "adp_change: %d\n", fsm->adp_change);
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seq_printf(s, "power_up: %d\n", fsm->power_up);
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seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);
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seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);
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seq_printf(s, "a_conn: %d\n", fsm->a_conn);
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seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);
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seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);
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seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);
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seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);
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seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);
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seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);
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seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);
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seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);
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seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);
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seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);
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seq_printf(s, "id: %d\n", fsm->id);
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seq_printf(s, "protocol: %d\n", fsm->protocol);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ci_otg);
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static int ci_role_show(struct seq_file *s, void *data)
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{
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struct ci_hdrc *ci = s->private;
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if (ci->role != CI_ROLE_END)
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seq_printf(s, "%s\n", ci_role(ci)->name);
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return 0;
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}
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static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *s = file->private_data;
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struct ci_hdrc *ci = s->private;
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enum ci_role role;
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char buf[8];
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int ret;
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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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for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
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if (ci->roles[role] &&
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!strncmp(buf, ci->roles[role]->name,
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strlen(ci->roles[role]->name)))
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break;
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if (role == CI_ROLE_END || role == ci->role)
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return -EINVAL;
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pm_runtime_get_sync(ci->dev);
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disable_irq(ci->irq);
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ci_role_stop(ci);
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ret = ci_role_start(ci, role);
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enable_irq(ci->irq);
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pm_runtime_put_sync(ci->dev);
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return ret ? ret : count;
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}
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static int ci_role_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ci_role_show, inode->i_private);
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}
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static const struct file_operations ci_role_fops = {
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.open = ci_role_open,
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.write = ci_role_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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static int ci_registers_show(struct seq_file *s, void *unused)
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{
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struct ci_hdrc *ci = s->private;
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u32 tmp_reg;
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if (!ci || ci->in_lpm)
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return -EPERM;
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/* ------ Registers ----- */
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tmp_reg = hw_read_intr_enable(ci);
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seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);
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tmp_reg = hw_read_intr_status(ci);
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seq_printf(s, "USBSTS reg: %08x\n", tmp_reg);
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tmp_reg = hw_read(ci, OP_USBMODE, ~0);
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seq_printf(s, "USBMODE reg: %08x\n", tmp_reg);
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tmp_reg = hw_read(ci, OP_USBCMD, ~0);
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seq_printf(s, "USBCMD reg: %08x\n", tmp_reg);
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tmp_reg = hw_read(ci, OP_PORTSC, ~0);
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seq_printf(s, "PORTSC reg: %08x\n", tmp_reg);
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if (ci->is_otg) {
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tmp_reg = hw_read_otgsc(ci, ~0);
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seq_printf(s, "OTGSC reg: %08x\n", tmp_reg);
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}
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(ci_registers);
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/**
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* dbg_create_files: initializes the attribute interface
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* @ci: device
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*
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* This function returns an error code
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*/
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void dbg_create_files(struct ci_hdrc *ci)
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{
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ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
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debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
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&ci_device_fops);
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debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, ci,
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&ci_port_test_fops);
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debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
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&ci_qheads_fops);
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debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
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&ci_requests_fops);
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if (ci_otg_is_fsm_mode(ci)) {
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debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
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&ci_otg_fops);
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}
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debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
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&ci_role_fops);
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debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
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&ci_registers_fops);
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}
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/**
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* dbg_remove_files: destroys the attribute interface
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* @ci: device
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*/
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void dbg_remove_files(struct ci_hdrc *ci)
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{
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debugfs_remove_recursive(ci->debugfs);
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}
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