236dd4d18f
This patch adds support for the FHCI USB controller, as found in the Freescale MPC836x and MPC832x processors. It can support Full or Low speed modes. Quite a lot the hardware is doing by itself (SOF generation, CRC generation and checking), though scheduling and retransmission is on software's shoulders. This controller does not integrate the root hub, so this driver also fakes one-port hub. External hub is required to support more than one device. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/*
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* Freescale QUICC Engine USB Host Controller Driver
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*
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* Copyright (c) Freescale Semicondutor, Inc. 2006.
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* Shlomi Gridish <gridish@freescale.com>
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* Jerry Huang <Chang-Ming.Huang@freescale.com>
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* Copyright (c) Logic Product Development, Inc. 2007
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* Peter Barada <peterb@logicpd.com>
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* Copyright (c) MontaVista Software, Inc. 2008.
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/usb.h>
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#include "../core/hcd.h"
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#include "fhci.h"
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void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er)
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{
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int i;
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if (usb_er == -1) {
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fhci->usb_irq_stat[12]++;
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return;
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}
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for (i = 0; i < 12; ++i) {
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if (usb_er & (1 << i))
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fhci->usb_irq_stat[i]++;
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}
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}
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static int fhci_dfs_regs_show(struct seq_file *s, void *v)
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{
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struct fhci_hcd *fhci = s->private;
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struct fhci_regs __iomem *regs = fhci->regs;
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seq_printf(s,
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"mode: 0x%x\n" "addr: 0x%x\n"
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"command: 0x%x\n" "ep0: 0x%x\n"
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"event: 0x%x\n" "mask: 0x%x\n"
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"status: 0x%x\n" "SOF timer: %d\n"
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"frame number: %d\n"
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"lines status: 0x%x\n",
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in_8(®s->usb_mod), in_8(®s->usb_addr),
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in_8(®s->usb_comm), in_be16(®s->usb_ep[0]),
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in_be16(®s->usb_event), in_be16(®s->usb_mask),
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in_8(®s->usb_status), in_be16(®s->usb_sof_tmr),
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in_be16(®s->usb_frame_num),
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fhci_ioports_check_bus_state(fhci));
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return 0;
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}
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static int fhci_dfs_irq_stat_show(struct seq_file *s, void *v)
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{
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struct fhci_hcd *fhci = s->private;
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int *usb_irq_stat = fhci->usb_irq_stat;
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seq_printf(s,
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"RXB: %d\n" "TXB: %d\n" "BSY: %d\n"
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"SOF: %d\n" "TXE0: %d\n" "TXE1: %d\n"
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"TXE2: %d\n" "TXE3: %d\n" "IDLE: %d\n"
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"RESET: %d\n" "SFT: %d\n" "MSF: %d\n"
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"IDLE_ONLY: %d\n",
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usb_irq_stat[0], usb_irq_stat[1], usb_irq_stat[2],
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usb_irq_stat[3], usb_irq_stat[4], usb_irq_stat[5],
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usb_irq_stat[6], usb_irq_stat[7], usb_irq_stat[8],
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usb_irq_stat[9], usb_irq_stat[10], usb_irq_stat[11],
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usb_irq_stat[12]);
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return 0;
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}
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static int fhci_dfs_regs_open(struct inode *inode, struct file *file)
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{
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return single_open(file, fhci_dfs_regs_show, inode->i_private);
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}
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static int fhci_dfs_irq_stat_open(struct inode *inode, struct file *file)
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{
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return single_open(file, fhci_dfs_irq_stat_show, inode->i_private);
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}
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static const struct file_operations fhci_dfs_regs_fops = {
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.open = fhci_dfs_regs_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 const struct file_operations fhci_dfs_irq_stat_fops = {
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.open = fhci_dfs_irq_stat_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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void fhci_dfs_create(struct fhci_hcd *fhci)
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{
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struct device *dev = fhci_to_hcd(fhci)->self.controller;
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fhci->dfs_root = debugfs_create_dir(dev->bus_id, NULL);
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if (!fhci->dfs_root) {
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WARN_ON(1);
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return;
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}
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fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO,
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fhci->dfs_root, fhci, &fhci_dfs_regs_fops);
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fhci->dfs_irq_stat = debugfs_create_file("irq_stat",
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S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
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&fhci_dfs_irq_stat_fops);
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WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat);
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}
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void fhci_dfs_destroy(struct fhci_hcd *fhci)
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{
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if (!fhci->dfs_root)
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return;
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if (fhci->dfs_irq_stat)
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debugfs_remove(fhci->dfs_irq_stat);
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if (fhci->dfs_regs)
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debugfs_remove(fhci->dfs_regs);
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debugfs_remove(fhci->dfs_root);
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}
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