diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/chipidea/debug.c | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c new file mode 100644 index 000000000..bbc610e5b --- /dev/null +++ b/drivers/usb/chipidea/debug.c @@ -0,0 +1,368 @@ +// 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_role_show(struct seq_file *s, void *data) +{ + struct ci_hdrc *ci = s->private; + + if (ci->role != CI_ROLE_END) + seq_printf(s, "%s\n", ci_role(ci)->name); + + return 0; +} + +static ssize_t ci_role_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; + enum ci_role role; + char buf[8]; + int ret; + + if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) + if (ci->roles[role] && + !strncmp(buf, ci->roles[role]->name, + strlen(ci->roles[role]->name))) + break; + + if (role == CI_ROLE_END || role == ci->role) + return -EINVAL; + + pm_runtime_get_sync(ci->dev); + disable_irq(ci->irq); + ci_role_stop(ci); + ret = ci_role_start(ci, role); + enable_irq(ci->irq); + pm_runtime_put_sync(ci->dev); + + return ret ? ret : count; +} + +static int ci_role_open(struct inode *inode, struct file *file) +{ + return single_open(file, ci_role_show, inode->i_private); +} + +static const struct file_operations ci_role_fops = { + .open = ci_role_open, + .write = ci_role_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +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("role", S_IRUGO | S_IWUSR, dir, ci, &ci_role_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); +} |