USB: Driver for Freescale QUICC Engine USB Host Controller

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>

1 files changed, 139 insertions, 0 deletions

diff --git a/drivers/usb/host/fhci-dbg.c b/drivers/usb/host/fhci-dbg.c
new file mode 100644
index 00000000000..34e14edf390
--- /dev/null
+++ b/drivers/usb/host/fhci-dbg.c
@@ -0,0 +1,139 @@
+/*
+ * Freescale QUICC Engine USB Host Controller Driver
+ *
+ * Copyright (c) Freescale Semicondutor, Inc. 2006.
+ *               Shlomi Gridish <gridish@freescale.com>
+ *               Jerry Huang <Chang-Ming.Huang@freescale.com>
+ * Copyright (c) Logic Product Development, Inc. 2007
+ *               Peter Barada <peterb@logicpd.com>
+ * Copyright (c) MontaVista Software, Inc. 2008.
+ *               Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/usb.h>
+#include "../core/hcd.h"
+#include "fhci.h"
+
+void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er)
+{
+	int i;
+
+	if (usb_er == -1) {
+		fhci->usb_irq_stat[12]++;
+		return;
+	}
+
+	for (i = 0; i < 12; ++i) {
+		if (usb_er & (1 << i))
+			fhci->usb_irq_stat[i]++;
+	}
+}
+
+static int fhci_dfs_regs_show(struct seq_file *s, void *v)
+{
+	struct fhci_hcd *fhci = s->private;
+	struct fhci_regs __iomem *regs = fhci->regs;
+
+	seq_printf(s,
+		"mode: 0x%x\n" "addr: 0x%x\n"
+		"command: 0x%x\n" "ep0: 0x%x\n"
+		"event: 0x%x\n" "mask: 0x%x\n"
+		"status: 0x%x\n" "SOF timer: %d\n"
+		"frame number: %d\n"
+		"lines status: 0x%x\n",
+		in_8(&regs->usb_mod), in_8(&regs->usb_addr),
+		in_8(&regs->usb_comm), in_be16(&regs->usb_ep[0]),
+		in_be16(&regs->usb_event), in_be16(&regs->usb_mask),
+		in_8(&regs->usb_status), in_be16(&regs->usb_sof_tmr),
+		in_be16(&regs->usb_frame_num),
+		fhci_ioports_check_bus_state(fhci));
+
+	return 0;
+}
+
+static int fhci_dfs_irq_stat_show(struct seq_file *s, void *v)
+{
+	struct fhci_hcd *fhci = s->private;
+	int *usb_irq_stat = fhci->usb_irq_stat;
+
+	seq_printf(s,
+		"RXB: %d\n" "TXB: %d\n" "BSY: %d\n"
+		"SOF: %d\n" "TXE0: %d\n" "TXE1: %d\n"
+		"TXE2: %d\n" "TXE3: %d\n" "IDLE: %d\n"
+		"RESET: %d\n" "SFT: %d\n" "MSF: %d\n"
+		"IDLE_ONLY: %d\n",
+		usb_irq_stat[0], usb_irq_stat[1], usb_irq_stat[2],
+		usb_irq_stat[3], usb_irq_stat[4], usb_irq_stat[5],
+		usb_irq_stat[6], usb_irq_stat[7], usb_irq_stat[8],
+		usb_irq_stat[9], usb_irq_stat[10], usb_irq_stat[11],
+		usb_irq_stat[12]);
+
+	return 0;
+}
+
+static int fhci_dfs_regs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, fhci_dfs_regs_show, inode->i_private);
+}
+
+static int fhci_dfs_irq_stat_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, fhci_dfs_irq_stat_show, inode->i_private);
+}
+
+static const struct file_operations fhci_dfs_regs_fops = {
+	.open = fhci_dfs_regs_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static const struct file_operations fhci_dfs_irq_stat_fops = {
+	.open = fhci_dfs_irq_stat_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+void fhci_dfs_create(struct fhci_hcd *fhci)
+{
+	struct device *dev = fhci_to_hcd(fhci)->self.controller;
+
+	fhci->dfs_root = debugfs_create_dir(dev->bus_id, NULL);
+	if (!fhci->dfs_root) {
+		WARN_ON(1);
+		return;
+	}
+
+	fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO,
+		fhci->dfs_root, fhci, &fhci_dfs_regs_fops);
+
+	fhci->dfs_irq_stat = debugfs_create_file("irq_stat",
+		S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
+		&fhci_dfs_irq_stat_fops);
+
+	WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat);
+}
+
+void fhci_dfs_destroy(struct fhci_hcd *fhci)
+{
+	if (!fhci->dfs_root)
+		return;
+
+	if (fhci->dfs_irq_stat)
+		debugfs_remove(fhci->dfs_irq_stat);
+
+	if (fhci->dfs_regs)
+		debugfs_remove(fhci->dfs_regs);
+
+	debugfs_remove(fhci->dfs_root);
+}