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37a842d36f
The main changes are adding several system interfaces for tuning performance, and each vendors can adjust them according to their design configurations. Others are tiny improvements, like more well siTD supports, USB_DEVICE_A_HNP_SUPPORT supports, etc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJVzU3lAAoJEEhZKYFQ1nG7nZ4H/AsCAhoiUqcyP4fRziaZzexa F55CuhIVd6vg6vhuiccoUo4XZXR6IsZikczNowWphqXhtQUBr/rvv0VSb2sMxZfn AgdNuinhGUat4rdcf0earr9+EQzjbdrHoxDzFKes21S0vS+J3TaYUk6F7Q6sUL81 t97itMmKBrffMZLsQzB9MJo4E8mD4JNlWu/ezGNu11ZD2/w8Ha7GpyExyb2AGHrs M1rlE6Ph8AKpyECI7OecCxPIDyDRuUQ8Bvj+MkR9BrDX1gOv512ZLfRbIGJCqVOO A2Urzh/jEI9e7ttGqSpMxGYKZ4wvZ7Ta5IvLLseb0vszM2oQGDNHcJx7fKOuUVU= =IIud -----END PGP SIGNATURE----- Merge tag 'usb-ci-v4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-next Peter writes: USB: chipidea updates for v4.3-rc1 The main changes are adding several system interfaces for tuning performance, and each vendors can adjust them according to their design configurations. Others are tiny improvements, like more well siTD supports, USB_DEVICE_A_HNP_SUPPORT supports, etc.
453 lines
11 KiB
C
453 lines
11 KiB
C
#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 "debug.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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static int ci_device_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ci_device_show, inode->i_private);
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}
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static const struct file_operations ci_device_fops = {
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.open = ci_device_open,
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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_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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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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static int ci_qheads_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ci_qheads_show, inode->i_private);
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}
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static const struct file_operations ci_qheads_fops = {
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.open = ci_qheads_open,
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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_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 list_head *ptr = NULL;
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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(ptr, &ci->ci_hw_ep[i].qh.queue) {
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req = list_entry(ptr, struct ci_hw_req, 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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static int ci_requests_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ci_requests_show, inode->i_private);
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}
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static const struct file_operations ci_requests_fops = {
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.open = ci_requests_open,
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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_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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static int ci_otg_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ci_otg_show, inode->i_private);
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}
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static const struct file_operations ci_otg_fops = {
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.open = ci_otg_open,
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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_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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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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ci_role_stop(ci);
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ret = ci_role_start(ci, role);
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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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static int ci_registers_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ci_registers_show, inode->i_private);
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}
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static const struct file_operations ci_registers_fops = {
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.open = ci_registers_open,
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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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* 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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int dbg_create_files(struct ci_hdrc *ci)
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{
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struct dentry *dent;
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ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
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if (!ci->debugfs)
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return -ENOMEM;
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dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
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&ci_device_fops);
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if (!dent)
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goto err;
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dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,
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ci, &ci_port_test_fops);
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if (!dent)
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goto err;
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dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
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&ci_qheads_fops);
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if (!dent)
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goto err;
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dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
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&ci_requests_fops);
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if (!dent)
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goto err;
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if (ci_otg_is_fsm_mode(ci)) {
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dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
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&ci_otg_fops);
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if (!dent)
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goto err;
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}
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dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
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&ci_role_fops);
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if (!dent)
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goto err;
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dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
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&ci_registers_fops);
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if (dent)
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return 0;
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err:
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debugfs_remove_recursive(ci->debugfs);
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return -ENOMEM;
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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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