Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314// SPDX-License-Identifier: GPL-2.0#include <linux/kernel.h>#include <linux/device.h>#include <linux/types.h>#include <linux/spinlock.h>#include <linux/debugfs.h>#include <linux/seq_file.h>#include <linux/uaccess.h>#include <linux/usb/ch9.h>#include <linux/usb/gadget.h>#include <linux/usb/phy.h>#include <linux/usb/otg.h>#include <linux/usb/otg-fsm.h>#include <linux/usb/chipidea.h>
#include "ci.h"#include "udc.h"#include "bits.h"#include "otg.h"
/* * ci_device_show: prints information about device capabilities and status */static int ci_device_show(struct seq_file *s, void *data){ struct ci_hdrc *ci = s->private; struct usb_gadget *gadget = &ci->gadget;
seq_printf(s, "speed = %d\n", gadget->speed); seq_printf(s, "max_speed = %d\n", gadget->max_speed); seq_printf(s, "is_otg = %d\n", gadget->is_otg); seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral); seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable); seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support); seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support); seq_printf(s, "name = %s\n", (gadget->name ? gadget->name : ""));
if (!ci->driver) return 0;
seq_printf(s, "gadget function = %s\n", (ci->driver->function ? ci->driver->function : "")); seq_printf(s, "gadget max speed = %d\n", ci->driver->max_speed);
return 0;}DEFINE_SHOW_ATTRIBUTE(ci_device);
/* * ci_port_test_show: reads port test mode */static int ci_port_test_show(struct seq_file *s, void *data){ struct ci_hdrc *ci = s->private; unsigned long flags; unsigned mode;
pm_runtime_get_sync(ci->dev); spin_lock_irqsave(&ci->lock, flags); mode = hw_port_test_get(ci); spin_unlock_irqrestore(&ci->lock, flags); pm_runtime_put_sync(ci->dev);
seq_printf(s, "mode = %u\n", mode);
return 0;}
/* * ci_port_test_write: writes port test mode */static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf, size_t count, loff_t *ppos){ struct seq_file *s = file->private_data; struct ci_hdrc *ci = s->private; unsigned long flags; unsigned mode; char buf[32]; int ret;
count = min_t(size_t, sizeof(buf) - 1, count); if (copy_from_user(buf, ubuf, count)) return -EFAULT;
/* sscanf requires a zero terminated string */ buf[count] = '\0';
if (sscanf(buf, "%u", &mode) != 1) return -EINVAL;
if (mode > 255) return -EBADRQC;
pm_runtime_get_sync(ci->dev); spin_lock_irqsave(&ci->lock, flags); ret = hw_port_test_set(ci, mode); spin_unlock_irqrestore(&ci->lock, flags); pm_runtime_put_sync(ci->dev);
return ret ? ret : count;}
static int ci_port_test_open(struct inode *inode, struct file *file){ return single_open(file, ci_port_test_show, inode->i_private);}
static const struct file_operations ci_port_test_fops = { .open = ci_port_test_open, .write = ci_port_test_write, .read = seq_read, .llseek = seq_lseek, .release = single_release,};
/* * ci_qheads_show: DMA contents of all queue heads */static int ci_qheads_show(struct seq_file *s, void *data){ struct ci_hdrc *ci = s->private; unsigned long flags; unsigned i, j;
if (ci->role != CI_ROLE_GADGET) { seq_printf(s, "not in gadget mode\n"); return 0; }
spin_lock_irqsave(&ci->lock, flags); for (i = 0; i < ci->hw_ep_max/2; i++) { struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i]; struct ci_hw_ep *hweptx = &ci->ci_hw_ep[i + ci->hw_ep_max/2]; seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n", i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma); for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++) seq_printf(s, " %04X: %08X %08X\n", j, *((u32 *)hweprx->qh.ptr + j), *((u32 *)hweptx->qh.ptr + j)); } spin_unlock_irqrestore(&ci->lock, flags);
return 0;}DEFINE_SHOW_ATTRIBUTE(ci_qheads);
/* * ci_requests_show: DMA contents of all requests currently queued (all endpts) */static int ci_requests_show(struct seq_file *s, void *data){ struct ci_hdrc *ci = s->private; unsigned long flags; struct ci_hw_req *req = NULL; struct td_node *node, *tmpnode; unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);
if (ci->role != CI_ROLE_GADGET) { seq_printf(s, "not in gadget mode\n"); return 0; }
spin_lock_irqsave(&ci->lock, flags); for (i = 0; i < ci->hw_ep_max; i++) list_for_each_entry(req, &ci->ci_hw_ep[i].qh.queue, queue) { list_for_each_entry_safe(node, tmpnode, &req->tds, td) { seq_printf(s, "EP=%02i: TD=%08X %s\n", i % (ci->hw_ep_max / 2), (u32)node->dma, ((i < ci->hw_ep_max/2) ? "RX" : "TX"));
for (j = 0; j < qsize; j++) seq_printf(s, " %04X: %08X\n", j, *((u32 *)node->ptr + j)); } } spin_unlock_irqrestore(&ci->lock, flags);
return 0;}DEFINE_SHOW_ATTRIBUTE(ci_requests);
static int ci_otg_show(struct seq_file *s, void *unused){ struct ci_hdrc *ci = s->private; struct otg_fsm *fsm;
if (!ci || !ci_otg_is_fsm_mode(ci)) return 0;
fsm = &ci->fsm;
/* ------ State ----- */ seq_printf(s, "OTG state: %s\n\n", usb_otg_state_string(ci->otg.state));
/* ------ State Machine Variables ----- */ seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);
seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);
seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);
seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);
seq_printf(s, "b_conn: %d\n", fsm->b_conn);
seq_printf(s, "adp_change: %d\n", fsm->adp_change);
seq_printf(s, "power_up: %d\n", fsm->power_up);
seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);
seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);
seq_printf(s, "a_conn: %d\n", fsm->a_conn);
seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);
seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);
seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);
seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);
seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);
seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);
seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);
seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);
seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);
seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);
seq_printf(s, "id: %d\n", fsm->id);
seq_printf(s, "protocol: %d\n", fsm->protocol);
return 0;}DEFINE_SHOW_ATTRIBUTE(ci_otg);
static int ci_registers_show(struct seq_file *s, void *unused){ struct ci_hdrc *ci = s->private; u32 tmp_reg;
if (!ci || ci->in_lpm) return -EPERM;
/* ------ 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;}DEFINE_SHOW_ATTRIBUTE(ci_registers);
/** * dbg_create_files: initializes the attribute interface * @ci: device * * This function returns an error code */void dbg_create_files(struct ci_hdrc *ci){ struct dentry *dir;
dir = debugfs_create_dir(dev_name(ci->dev), usb_debug_root);
debugfs_create_file("device", S_IRUGO, dir, ci, &ci_device_fops); debugfs_create_file("port_test", S_IRUGO | S_IWUSR, dir, ci, &ci_port_test_fops); debugfs_create_file("qheads", S_IRUGO, dir, ci, &ci_qheads_fops); debugfs_create_file("requests", S_IRUGO, dir, ci, &ci_requests_fops);
if (ci_otg_is_fsm_mode(ci)) debugfs_create_file("otg", S_IRUGO, dir, ci, &ci_otg_fops);
debugfs_create_file("registers", S_IRUGO, dir, ci, &ci_registers_fops);}
/** * dbg_remove_files: destroys the attribute interface * @ci: device */void dbg_remove_files(struct ci_hdrc *ci){ debugfs_lookup_and_remove(dev_name(ci->dev), usb_debug_root);}