![David Lopo](/assets/img/avatar_default.png)
MIPS USB IP core family device controller Currently it only supports IP part number CI13412. [dbrownell@users.sourceforge.net: minor comment tweaks] Signed-off-by: David Lopo <dlopo@chipidea.mips.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2831 lines
68 KiB
C
2831 lines
68 KiB
C
/*
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* ci13xxx_udc.c - MIPS USB IP core family device controller
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*
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* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
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*
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* Author: David Lopo
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* Description: MIPS USB IP core family device controller
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* Currently it only supports IP part number CI13412
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*
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* This driver is composed of several blocks:
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* - HW: hardware interface
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* - DBG: debug facilities (optional)
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* - UTIL: utilities
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* - ISR: interrupts handling
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* - ENDPT: endpoint operations (Gadget API)
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* - GADGET: gadget operations (Gadget API)
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* - BUS: bus glue code, bus abstraction layer
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* - PCI: PCI core interface and PCI resources (interrupts, memory...)
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*
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* Compile Options
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* - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
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* - STALL_IN: non-empty bulk-in pipes cannot be halted
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* if defined mass storage compliance succeeds but with warnings
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* => case 4: Hi > Dn
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* => case 5: Hi > Di
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* => case 8: Hi <> Do
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* if undefined usbtest 13 fails
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* - TRACE: enable function tracing (depends on DEBUG)
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*
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* Main Features
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* - Chapter 9 & Mass Storage Compliance with Gadget File Storage
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* - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
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* - Normal & LPM support
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*
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* USBTEST Report
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* - OK: 0-12, 13 (STALL_IN defined) & 14
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* - Not Supported: 15 & 16 (ISO)
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*
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* TODO List
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* - OTG
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* - Isochronous & Interrupt Traffic
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* - Handle requests which spawns into several TDs
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* - GET_STATUS(device) - always reports 0
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* - Gadget API (majority of optional features)
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* - Suspend & Remote Wakeup
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*/
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#include <linux/device.h>
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#include <linux/dmapool.h>
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#include <linux/dma-mapping.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include "ci13xxx_udc.h"
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/******************************************************************************
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* DEFINE
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*****************************************************************************/
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/* ctrl register bank access */
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static DEFINE_SPINLOCK(udc_lock);
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/* driver name */
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#define UDC_DRIVER_NAME "ci13xxx_udc"
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/* control endpoint description */
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static const struct usb_endpoint_descriptor
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ctrl_endpt_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
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.wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
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};
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/* UDC descriptor */
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static struct ci13xxx *_udc;
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/* Interrupt statistics */
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#define ISR_MASK 0x1F
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static struct {
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u32 test;
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u32 ui;
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u32 uei;
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u32 pci;
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u32 uri;
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u32 sli;
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u32 none;
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struct {
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u32 cnt;
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u32 buf[ISR_MASK+1];
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u32 idx;
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} hndl;
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} isr_statistics;
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/**
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* ffs_nr: find first (least significant) bit set
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* @x: the word to search
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*
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* This function returns bit number (instead of position)
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*/
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static int ffs_nr(u32 x)
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{
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int n = ffs(x);
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return n ? n-1 : 32;
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}
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/******************************************************************************
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* HW block
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*****************************************************************************/
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/* register bank descriptor */
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static struct {
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unsigned lpm; /* is LPM? */
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void __iomem *abs; /* bus map offset */
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void __iomem *cap; /* bus map offset + CAP offset + CAP data */
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size_t size; /* bank size */
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} hw_bank;
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/* UDC register map */
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#define ABS_CAPLENGTH (0x100UL)
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#define ABS_HCCPARAMS (0x108UL)
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#define ABS_DCCPARAMS (0x124UL)
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#define ABS_TESTMODE (hw_bank.lpm ? 0x0FCUL : 0x138UL)
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/* offset to CAPLENTGH (addr + data) */
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#define CAP_USBCMD (0x000UL)
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#define CAP_USBSTS (0x004UL)
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#define CAP_USBINTR (0x008UL)
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#define CAP_DEVICEADDR (0x014UL)
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#define CAP_ENDPTLISTADDR (0x018UL)
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#define CAP_PORTSC (0x044UL)
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#define CAP_DEVLC (0x0B4UL)
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#define CAP_USBMODE (hw_bank.lpm ? 0x0C8UL : 0x068UL)
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#define CAP_ENDPTSETUPSTAT (hw_bank.lpm ? 0x0D8UL : 0x06CUL)
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#define CAP_ENDPTPRIME (hw_bank.lpm ? 0x0DCUL : 0x070UL)
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#define CAP_ENDPTFLUSH (hw_bank.lpm ? 0x0E0UL : 0x074UL)
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#define CAP_ENDPTSTAT (hw_bank.lpm ? 0x0E4UL : 0x078UL)
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#define CAP_ENDPTCOMPLETE (hw_bank.lpm ? 0x0E8UL : 0x07CUL)
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#define CAP_ENDPTCTRL (hw_bank.lpm ? 0x0ECUL : 0x080UL)
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#define CAP_LAST (hw_bank.lpm ? 0x12CUL : 0x0C0UL)
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/* maximum number of enpoints: valid only after hw_device_reset() */
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static unsigned hw_ep_max;
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/**
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* hw_ep_bit: calculates the bit number
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* @num: endpoint number
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* @dir: endpoint direction
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*
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* This function returns bit number
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*/
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static inline int hw_ep_bit(int num, int dir)
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{
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return num + (dir ? 16 : 0);
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}
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/**
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* hw_aread: reads from register bitfield
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* @addr: address relative to bus map
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* @mask: bitfield mask
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*
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* This function returns register bitfield data
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*/
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static u32 hw_aread(u32 addr, u32 mask)
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{
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return ioread32(addr + hw_bank.abs) & mask;
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}
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/**
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* hw_awrite: writes to register bitfield
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* @addr: address relative to bus map
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* @mask: bitfield mask
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* @data: new data
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*/
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static void hw_awrite(u32 addr, u32 mask, u32 data)
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{
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iowrite32(hw_aread(addr, ~mask) | (data & mask),
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addr + hw_bank.abs);
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}
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/**
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* hw_cread: reads from register bitfield
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* @addr: address relative to CAP offset plus content
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* @mask: bitfield mask
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*
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* This function returns register bitfield data
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*/
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static u32 hw_cread(u32 addr, u32 mask)
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{
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return ioread32(addr + hw_bank.cap) & mask;
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}
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/**
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* hw_cwrite: writes to register bitfield
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* @addr: address relative to CAP offset plus content
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* @mask: bitfield mask
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* @data: new data
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*/
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static void hw_cwrite(u32 addr, u32 mask, u32 data)
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{
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iowrite32(hw_cread(addr, ~mask) | (data & mask),
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addr + hw_bank.cap);
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}
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/**
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* hw_ctest_and_clear: tests & clears register bitfield
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* @addr: address relative to CAP offset plus content
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* @mask: bitfield mask
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*
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* This function returns register bitfield data
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*/
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static u32 hw_ctest_and_clear(u32 addr, u32 mask)
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{
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u32 reg = hw_cread(addr, mask);
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iowrite32(reg, addr + hw_bank.cap);
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return reg;
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}
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/**
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* hw_ctest_and_write: tests & writes register bitfield
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* @addr: address relative to CAP offset plus content
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* @mask: bitfield mask
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* @data: new data
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*
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* This function returns register bitfield data
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*/
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static u32 hw_ctest_and_write(u32 addr, u32 mask, u32 data)
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{
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u32 reg = hw_cread(addr, ~0);
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iowrite32((reg & ~mask) | (data & mask), addr + hw_bank.cap);
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return (reg & mask) >> ffs_nr(mask);
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}
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/**
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* hw_device_reset: resets chip (execute without interruption)
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* @base: register base address
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*
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* This function returns an error code
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*/
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static int hw_device_reset(void __iomem *base)
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{
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u32 reg;
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/* bank is a module variable */
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hw_bank.abs = base;
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hw_bank.cap = hw_bank.abs;
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hw_bank.cap += ABS_CAPLENGTH;
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hw_bank.cap += ioread8(hw_bank.cap);
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reg = hw_aread(ABS_HCCPARAMS, HCCPARAMS_LEN) >> ffs_nr(HCCPARAMS_LEN);
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hw_bank.lpm = reg;
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hw_bank.size = hw_bank.cap - hw_bank.abs;
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hw_bank.size += CAP_LAST;
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hw_bank.size /= sizeof(u32);
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/* should flush & stop before reset */
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hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0);
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hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
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hw_cwrite(CAP_USBCMD, USBCMD_RST, USBCMD_RST);
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while (hw_cread(CAP_USBCMD, USBCMD_RST))
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udelay(10); /* not RTOS friendly */
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/* USBMODE should be configured step by step */
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hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
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hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
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hw_cwrite(CAP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); /* HW >= 2.3 */
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if (hw_cread(CAP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
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pr_err("cannot enter in device mode");
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pr_err("lpm = %i", hw_bank.lpm);
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return -ENODEV;
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}
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reg = hw_aread(ABS_DCCPARAMS, DCCPARAMS_DEN) >> ffs_nr(DCCPARAMS_DEN);
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if (reg == 0 || reg > ENDPT_MAX)
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return -ENODEV;
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hw_ep_max = reg; /* cache hw ENDPT_MAX */
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/* setup lock mode ? */
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/* ENDPTSETUPSTAT is '0' by default */
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/* HCSPARAMS.bf.ppc SHOULD BE zero for device */
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return 0;
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}
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/**
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* hw_device_state: enables/disables interrupts & starts/stops device (execute
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* without interruption)
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* @dma: 0 => disable, !0 => enable and set dma engine
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*
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* This function returns an error code
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*/
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static int hw_device_state(u32 dma)
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{
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if (dma) {
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hw_cwrite(CAP_ENDPTLISTADDR, ~0, dma);
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/* interrupt, error, port change, reset, sleep/suspend */
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hw_cwrite(CAP_USBINTR, ~0,
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USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
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hw_cwrite(CAP_USBCMD, USBCMD_RS, USBCMD_RS);
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} else {
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hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
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hw_cwrite(CAP_USBINTR, ~0, 0);
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}
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return 0;
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}
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/**
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* hw_ep_flush: flush endpoint fifo (execute without interruption)
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* @num: endpoint number
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* @dir: endpoint direction
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*
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* This function returns an error code
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*/
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static int hw_ep_flush(int num, int dir)
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{
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int n = hw_ep_bit(num, dir);
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do {
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/* flush any pending transfer */
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hw_cwrite(CAP_ENDPTFLUSH, BIT(n), BIT(n));
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while (hw_cread(CAP_ENDPTFLUSH, BIT(n)))
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cpu_relax();
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} while (hw_cread(CAP_ENDPTSTAT, BIT(n)));
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return 0;
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}
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/**
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* hw_ep_disable: disables endpoint (execute without interruption)
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* @num: endpoint number
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* @dir: endpoint direction
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*
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* This function returns an error code
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*/
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static int hw_ep_disable(int num, int dir)
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{
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hw_ep_flush(num, dir);
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hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32),
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dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
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return 0;
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}
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/**
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* hw_ep_enable: enables endpoint (execute without interruption)
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* @num: endpoint number
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* @dir: endpoint direction
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* @type: endpoint type
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*
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* This function returns an error code
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*/
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static int hw_ep_enable(int num, int dir, int type)
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{
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u32 mask, data;
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if (dir) {
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mask = ENDPTCTRL_TXT; /* type */
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data = type << ffs_nr(mask);
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mask |= ENDPTCTRL_TXS; /* unstall */
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mask |= ENDPTCTRL_TXR; /* reset data toggle */
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data |= ENDPTCTRL_TXR;
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mask |= ENDPTCTRL_TXE; /* enable */
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data |= ENDPTCTRL_TXE;
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} else {
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mask = ENDPTCTRL_RXT; /* type */
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data = type << ffs_nr(mask);
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mask |= ENDPTCTRL_RXS; /* unstall */
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mask |= ENDPTCTRL_RXR; /* reset data toggle */
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data |= ENDPTCTRL_RXR;
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mask |= ENDPTCTRL_RXE; /* enable */
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data |= ENDPTCTRL_RXE;
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}
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hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32), mask, data);
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return 0;
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}
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/**
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* hw_ep_get_halt: return endpoint halt status
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* @num: endpoint number
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* @dir: endpoint direction
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*
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* This function returns 1 if endpoint halted
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*/
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static int hw_ep_get_halt(int num, int dir)
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{
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u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
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return hw_cread(CAP_ENDPTCTRL + num * sizeof(u32), mask) ? 1 : 0;
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}
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/**
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* hw_ep_is_primed: test if endpoint is primed (execute without interruption)
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* @num: endpoint number
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* @dir: endpoint direction
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*
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* This function returns true if endpoint primed
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*/
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static int hw_ep_is_primed(int num, int dir)
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{
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u32 reg = hw_cread(CAP_ENDPTPRIME, ~0) | hw_cread(CAP_ENDPTSTAT, ~0);
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return test_bit(hw_ep_bit(num, dir), (void *)®);
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}
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/**
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* hw_test_and_clear_setup_status: test & clear setup status (execute without
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* interruption)
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* @n: bit number (endpoint)
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*
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* This function returns setup status
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*/
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static int hw_test_and_clear_setup_status(int n)
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{
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return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n));
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}
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/**
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* hw_ep_prime: primes endpoint (execute without interruption)
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* @num: endpoint number
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* @dir: endpoint direction
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* @is_ctrl: true if control endpoint
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*
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* This function returns an error code
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*/
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static int hw_ep_prime(int num, int dir, int is_ctrl)
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{
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int n = hw_ep_bit(num, dir);
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/* the caller should flush first */
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if (hw_ep_is_primed(num, dir))
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return -EBUSY;
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if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
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return -EAGAIN;
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hw_cwrite(CAP_ENDPTPRIME, BIT(n), BIT(n));
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while (hw_cread(CAP_ENDPTPRIME, BIT(n)))
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cpu_relax();
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if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
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return -EAGAIN;
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/* status shoult be tested according with manual but it doesn't work */
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return 0;
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}
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/**
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* hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
|
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* without interruption)
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* @num: endpoint number
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* @dir: endpoint direction
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* @value: true => stall, false => unstall
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*
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* This function returns an error code
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*/
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static int hw_ep_set_halt(int num, int dir, int value)
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{
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if (value != 0 && value != 1)
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return -EINVAL;
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do {
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u32 addr = CAP_ENDPTCTRL + num * sizeof(u32);
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u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
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u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
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/* data toggle - reserved for EP0 but it's in ESS */
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hw_cwrite(addr, mask_xs|mask_xr, value ? mask_xs : mask_xr);
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} while (value != hw_ep_get_halt(num, dir));
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return 0;
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}
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/**
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* hw_intr_clear: disables interrupt & clears interrupt status (execute without
|
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* interruption)
|
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* @n: interrupt bit
|
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*
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* This function returns an error code
|
||
*/
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static int hw_intr_clear(int n)
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{
|
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if (n >= REG_BITS)
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return -EINVAL;
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hw_cwrite(CAP_USBINTR, BIT(n), 0);
|
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hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
|
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return 0;
|
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}
|
||
|
||
/**
|
||
* hw_intr_force: enables interrupt & forces interrupt status (execute without
|
||
* interruption)
|
||
* @n: interrupt bit
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int hw_intr_force(int n)
|
||
{
|
||
if (n >= REG_BITS)
|
||
return -EINVAL;
|
||
|
||
hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
|
||
hw_cwrite(CAP_USBINTR, BIT(n), BIT(n));
|
||
hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
|
||
hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, 0);
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* hw_is_port_high_speed: test if port is high speed
|
||
*
|
||
* This function returns true if high speed port
|
||
*/
|
||
static int hw_port_is_high_speed(void)
|
||
{
|
||
return hw_bank.lpm ? hw_cread(CAP_DEVLC, DEVLC_PSPD) :
|
||
hw_cread(CAP_PORTSC, PORTSC_HSP);
|
||
}
|
||
|
||
/**
|
||
* hw_port_test_get: reads port test mode value
|
||
*
|
||
* This function returns port test mode value
|
||
*/
|
||
static u8 hw_port_test_get(void)
|
||
{
|
||
return hw_cread(CAP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
|
||
}
|
||
|
||
/**
|
||
* hw_port_test_set: writes port test mode (execute without interruption)
|
||
* @mode: new value
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int hw_port_test_set(u8 mode)
|
||
{
|
||
const u8 TEST_MODE_MAX = 7;
|
||
|
||
if (mode > TEST_MODE_MAX)
|
||
return -EINVAL;
|
||
|
||
hw_cwrite(CAP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* hw_read_intr_enable: returns interrupt enable register
|
||
*
|
||
* This function returns register data
|
||
*/
|
||
static u32 hw_read_intr_enable(void)
|
||
{
|
||
return hw_cread(CAP_USBINTR, ~0);
|
||
}
|
||
|
||
/**
|
||
* hw_read_intr_status: returns interrupt status register
|
||
*
|
||
* This function returns register data
|
||
*/
|
||
static u32 hw_read_intr_status(void)
|
||
{
|
||
return hw_cread(CAP_USBSTS, ~0);
|
||
}
|
||
|
||
/**
|
||
* hw_register_read: reads all device registers (execute without interruption)
|
||
* @buf: destination buffer
|
||
* @size: buffer size
|
||
*
|
||
* This function returns number of registers read
|
||
*/
|
||
static size_t hw_register_read(u32 *buf, size_t size)
|
||
{
|
||
unsigned i;
|
||
|
||
if (size > hw_bank.size)
|
||
size = hw_bank.size;
|
||
|
||
for (i = 0; i < size; i++)
|
||
buf[i] = hw_aread(i * sizeof(u32), ~0);
|
||
|
||
return size;
|
||
}
|
||
|
||
/**
|
||
* hw_register_write: writes to register
|
||
* @addr: register address
|
||
* @data: register value
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int hw_register_write(u16 addr, u32 data)
|
||
{
|
||
/* align */
|
||
addr /= sizeof(u32);
|
||
|
||
if (addr >= hw_bank.size)
|
||
return -EINVAL;
|
||
|
||
/* align */
|
||
addr *= sizeof(u32);
|
||
|
||
hw_awrite(addr, ~0, data);
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* hw_test_and_clear_complete: test & clear complete status (execute without
|
||
* interruption)
|
||
* @n: bit number (endpoint)
|
||
*
|
||
* This function returns complete status
|
||
*/
|
||
static int hw_test_and_clear_complete(int n)
|
||
{
|
||
return hw_ctest_and_clear(CAP_ENDPTCOMPLETE, BIT(n));
|
||
}
|
||
|
||
/**
|
||
* hw_test_and_clear_intr_active: test & clear active interrupts (execute
|
||
* without interruption)
|
||
*
|
||
* This function returns active interrutps
|
||
*/
|
||
static u32 hw_test_and_clear_intr_active(void)
|
||
{
|
||
u32 reg = hw_read_intr_status() & hw_read_intr_enable();
|
||
|
||
hw_cwrite(CAP_USBSTS, ~0, reg);
|
||
return reg;
|
||
}
|
||
|
||
/**
|
||
* hw_test_and_clear_setup_guard: test & clear setup guard (execute without
|
||
* interruption)
|
||
*
|
||
* This function returns guard value
|
||
*/
|
||
static int hw_test_and_clear_setup_guard(void)
|
||
{
|
||
return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, 0);
|
||
}
|
||
|
||
/**
|
||
* hw_test_and_set_setup_guard: test & set setup guard (execute without
|
||
* interruption)
|
||
*
|
||
* This function returns guard value
|
||
*/
|
||
static int hw_test_and_set_setup_guard(void)
|
||
{
|
||
return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
|
||
}
|
||
|
||
/**
|
||
* hw_usb_set_address: configures USB address (execute without interruption)
|
||
* @value: new USB address
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int hw_usb_set_address(u8 value)
|
||
{
|
||
/* advance */
|
||
hw_cwrite(CAP_DEVICEADDR, DEVICEADDR_USBADR | DEVICEADDR_USBADRA,
|
||
value << ffs_nr(DEVICEADDR_USBADR) | DEVICEADDR_USBADRA);
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* hw_usb_reset: restart device after a bus reset (execute without
|
||
* interruption)
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int hw_usb_reset(void)
|
||
{
|
||
hw_usb_set_address(0);
|
||
|
||
/* ESS flushes only at end?!? */
|
||
hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0); /* flush all EPs */
|
||
|
||
/* clear setup token semaphores */
|
||
hw_cwrite(CAP_ENDPTSETUPSTAT, 0, 0); /* writes its content */
|
||
|
||
/* clear complete status */
|
||
hw_cwrite(CAP_ENDPTCOMPLETE, 0, 0); /* writes its content */
|
||
|
||
/* wait until all bits cleared */
|
||
while (hw_cread(CAP_ENDPTPRIME, ~0))
|
||
udelay(10); /* not RTOS friendly */
|
||
|
||
/* reset all endpoints ? */
|
||
|
||
/* reset internal status and wait for further instructions
|
||
no need to verify the port reset status (ESS does it) */
|
||
|
||
return 0;
|
||
}
|
||
|
||
/******************************************************************************
|
||
* DBG block
|
||
*****************************************************************************/
|
||
/**
|
||
* show_device: prints information about device capabilities and status
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_device(struct device *dev, struct device_attribute *attr,
|
||
char *buf)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
struct usb_gadget *gadget = &udc->gadget;
|
||
int n = 0;
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
|
||
gadget->speed);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
|
||
gadget->is_dualspeed);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
|
||
gadget->is_otg);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
|
||
gadget->is_a_peripheral);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
|
||
gadget->b_hnp_enable);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
|
||
gadget->a_hnp_support);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
|
||
gadget->a_alt_hnp_support);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
|
||
(gadget->name ? gadget->name : ""));
|
||
|
||
return n;
|
||
}
|
||
static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
|
||
|
||
/**
|
||
* show_driver: prints information about attached gadget (if any)
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
|
||
char *buf)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
struct usb_gadget_driver *driver = udc->driver;
|
||
int n = 0;
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
if (driver == NULL)
|
||
return scnprintf(buf, PAGE_SIZE,
|
||
"There is no gadget attached!\n");
|
||
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
|
||
(driver->function ? driver->function : ""));
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
|
||
driver->speed);
|
||
|
||
return n;
|
||
}
|
||
static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
|
||
|
||
/* Maximum event message length */
|
||
#define DBG_DATA_MSG 64UL
|
||
|
||
/* Maximum event messages */
|
||
#define DBG_DATA_MAX 128UL
|
||
|
||
/* Event buffer descriptor */
|
||
static struct {
|
||
char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
|
||
unsigned idx; /* index */
|
||
unsigned tty; /* print to console? */
|
||
rwlock_t lck; /* lock */
|
||
} dbg_data = {
|
||
.idx = 0,
|
||
.tty = 0,
|
||
.lck = __RW_LOCK_UNLOCKED(lck)
|
||
};
|
||
|
||
/**
|
||
* dbg_dec: decrements debug event index
|
||
* @idx: buffer index
|
||
*/
|
||
static void dbg_dec(unsigned *idx)
|
||
{
|
||
*idx = (*idx - 1) & (DBG_DATA_MAX-1);
|
||
}
|
||
|
||
/**
|
||
* dbg_inc: increments debug event index
|
||
* @idx: buffer index
|
||
*/
|
||
static void dbg_inc(unsigned *idx)
|
||
{
|
||
*idx = (*idx + 1) & (DBG_DATA_MAX-1);
|
||
}
|
||
|
||
/**
|
||
* dbg_print: prints the common part of the event
|
||
* @addr: endpoint address
|
||
* @name: event name
|
||
* @status: status
|
||
* @extra: extra information
|
||
*/
|
||
static void dbg_print(u8 addr, const char *name, int status, const char *extra)
|
||
{
|
||
struct timeval tval;
|
||
unsigned int stamp;
|
||
unsigned long flags;
|
||
|
||
write_lock_irqsave(&dbg_data.lck, flags);
|
||
|
||
do_gettimeofday(&tval);
|
||
stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
|
||
stamp = stamp * 1000000 + tval.tv_usec;
|
||
|
||
scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
|
||
"%04X\t<EFBFBD> %02X %-7.7s %4i <20>\t%s\n",
|
||
stamp, addr, name, status, extra);
|
||
|
||
dbg_inc(&dbg_data.idx);
|
||
|
||
write_unlock_irqrestore(&dbg_data.lck, flags);
|
||
|
||
if (dbg_data.tty != 0)
|
||
pr_notice("%04X\t<EFBFBD> %02X %-7.7s %4i <20>\t%s\n",
|
||
stamp, addr, name, status, extra);
|
||
}
|
||
|
||
/**
|
||
* dbg_done: prints a DONE event
|
||
* @addr: endpoint address
|
||
* @td: transfer descriptor
|
||
* @status: status
|
||
*/
|
||
static void dbg_done(u8 addr, const u32 token, int status)
|
||
{
|
||
char msg[DBG_DATA_MSG];
|
||
|
||
scnprintf(msg, sizeof(msg), "%d %02X",
|
||
(int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
|
||
(int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
|
||
dbg_print(addr, "DONE", status, msg);
|
||
}
|
||
|
||
/**
|
||
* dbg_event: prints a generic event
|
||
* @addr: endpoint address
|
||
* @name: event name
|
||
* @status: status
|
||
*/
|
||
static void dbg_event(u8 addr, const char *name, int status)
|
||
{
|
||
if (name != NULL)
|
||
dbg_print(addr, name, status, "");
|
||
}
|
||
|
||
/*
|
||
* dbg_queue: prints a QUEUE event
|
||
* @addr: endpoint address
|
||
* @req: USB request
|
||
* @status: status
|
||
*/
|
||
static void dbg_queue(u8 addr, const struct usb_request *req, int status)
|
||
{
|
||
char msg[DBG_DATA_MSG];
|
||
|
||
if (req != NULL) {
|
||
scnprintf(msg, sizeof(msg),
|
||
"%d %d", !req->no_interrupt, req->length);
|
||
dbg_print(addr, "QUEUE", status, msg);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* dbg_setup: prints a SETUP event
|
||
* @addr: endpoint address
|
||
* @req: setup request
|
||
*/
|
||
static void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
|
||
{
|
||
char msg[DBG_DATA_MSG];
|
||
|
||
if (req != NULL) {
|
||
scnprintf(msg, sizeof(msg),
|
||
"%02X %02X %04X %04X %d", req->bRequestType,
|
||
req->bRequest, le16_to_cpu(req->wValue),
|
||
le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
|
||
dbg_print(addr, "SETUP", 0, msg);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* show_events: displays the event buffer
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_events(struct device *dev, struct device_attribute *attr,
|
||
char *buf)
|
||
{
|
||
unsigned long flags;
|
||
unsigned i, j, n = 0;
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
read_lock_irqsave(&dbg_data.lck, flags);
|
||
|
||
i = dbg_data.idx;
|
||
for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
|
||
n += strlen(dbg_data.buf[i]);
|
||
if (n >= PAGE_SIZE) {
|
||
n -= strlen(dbg_data.buf[i]);
|
||
break;
|
||
}
|
||
}
|
||
for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
|
||
j += scnprintf(buf + j, PAGE_SIZE - j,
|
||
"%s", dbg_data.buf[i]);
|
||
|
||
read_unlock_irqrestore(&dbg_data.lck, flags);
|
||
|
||
return n;
|
||
}
|
||
|
||
/**
|
||
* store_events: configure if events are going to be also printed to console
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t store_events(struct device *dev, struct device_attribute *attr,
|
||
const char *buf, size_t count)
|
||
{
|
||
unsigned tty;
|
||
|
||
dbg_trace("[%s] %p, %d\n", __func__, buf, count);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
goto done;
|
||
}
|
||
|
||
if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
|
||
dev_err(dev, "<1|0>: enable|disable console log\n");
|
||
goto done;
|
||
}
|
||
|
||
dbg_data.tty = tty;
|
||
dev_info(dev, "tty = %u", dbg_data.tty);
|
||
|
||
done:
|
||
return count;
|
||
}
|
||
static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
|
||
|
||
/**
|
||
* show_inters: interrupt status, enable status and historic
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
|
||
char *buf)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long flags;
|
||
u32 intr;
|
||
unsigned i, j, n = 0;
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
|
||
n += scnprintf(buf + n, PAGE_SIZE - n,
|
||
"status = %08x\n", hw_read_intr_status());
|
||
n += scnprintf(buf + n, PAGE_SIZE - n,
|
||
"enable = %08x\n", hw_read_intr_enable());
|
||
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
|
||
isr_statistics.test);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "<EFBFBD> ui = %d\n",
|
||
isr_statistics.ui);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "<EFBFBD> uei = %d\n",
|
||
isr_statistics.uei);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "<EFBFBD> pci = %d\n",
|
||
isr_statistics.pci);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "<EFBFBD> uri = %d\n",
|
||
isr_statistics.uri);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "<EFBFBD> sli = %d\n",
|
||
isr_statistics.sli);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
|
||
isr_statistics.none);
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
|
||
isr_statistics.hndl.cnt);
|
||
|
||
for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
|
||
i &= ISR_MASK;
|
||
intr = isr_statistics.hndl.buf[i];
|
||
|
||
if (USBi_UI & intr)
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
|
||
intr &= ~USBi_UI;
|
||
if (USBi_UEI & intr)
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
|
||
intr &= ~USBi_UEI;
|
||
if (USBi_PCI & intr)
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
|
||
intr &= ~USBi_PCI;
|
||
if (USBi_URI & intr)
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
|
||
intr &= ~USBi_URI;
|
||
if (USBi_SLI & intr)
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
|
||
intr &= ~USBi_SLI;
|
||
if (intr)
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
|
||
if (isr_statistics.hndl.buf[i])
|
||
n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
|
||
}
|
||
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
return n;
|
||
}
|
||
|
||
/**
|
||
* store_inters: enable & force or disable an individual interrutps
|
||
* (to be used for test purposes only)
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
|
||
const char *buf, size_t count)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long flags;
|
||
unsigned en, bit;
|
||
|
||
dbg_trace("[%s] %p, %d\n", __func__, buf, count);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
goto done;
|
||
}
|
||
|
||
if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
|
||
dev_err(dev, "<1|0> <bit>: enable|disable interrupt");
|
||
goto done;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
if (en) {
|
||
if (hw_intr_force(bit))
|
||
dev_err(dev, "invalid bit number\n");
|
||
else
|
||
isr_statistics.test++;
|
||
} else {
|
||
if (hw_intr_clear(bit))
|
||
dev_err(dev, "invalid bit number\n");
|
||
}
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
done:
|
||
return count;
|
||
}
|
||
static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
|
||
|
||
/**
|
||
* show_port_test: reads port test mode
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_port_test(struct device *dev,
|
||
struct device_attribute *attr, char *buf)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long flags;
|
||
unsigned mode;
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
mode = hw_port_test_get();
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
|
||
}
|
||
|
||
/**
|
||
* store_port_test: writes port test mode
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t store_port_test(struct device *dev,
|
||
struct device_attribute *attr,
|
||
const char *buf, size_t count)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long flags;
|
||
unsigned mode;
|
||
|
||
dbg_trace("[%s] %p, %d\n", __func__, buf, count);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
goto done;
|
||
}
|
||
|
||
if (sscanf(buf, "%u", &mode) != 1) {
|
||
dev_err(dev, "<mode>: set port test mode");
|
||
goto done;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
if (hw_port_test_set(mode))
|
||
dev_err(dev, "invalid mode\n");
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
done:
|
||
return count;
|
||
}
|
||
static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
|
||
show_port_test, store_port_test);
|
||
|
||
/**
|
||
* show_qheads: DMA contents of all queue heads
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
|
||
char *buf)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long flags;
|
||
unsigned i, j, n = 0;
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
for (i = 0; i < hw_ep_max; i++) {
|
||
struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
|
||
n += scnprintf(buf + n, PAGE_SIZE - n,
|
||
"EP=%02i: RX=%08X TX=%08X\n",
|
||
i, (u32)mEp->qh[RX].dma, (u32)mEp->qh[TX].dma);
|
||
for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
|
||
n += scnprintf(buf + n, PAGE_SIZE - n,
|
||
" %04X: %08X %08X\n", j,
|
||
*((u32 *)mEp->qh[RX].ptr + j),
|
||
*((u32 *)mEp->qh[TX].ptr + j));
|
||
}
|
||
}
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
return n;
|
||
}
|
||
static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
|
||
|
||
/**
|
||
* show_registers: dumps all registers
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_registers(struct device *dev,
|
||
struct device_attribute *attr, char *buf)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long flags;
|
||
u32 dump[512];
|
||
unsigned i, k, n = 0;
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
k = hw_register_read(dump, sizeof(dump)/sizeof(u32));
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
for (i = 0; i < k; i++) {
|
||
n += scnprintf(buf + n, PAGE_SIZE - n,
|
||
"reg[0x%04X] = 0x%08X\n",
|
||
i * (unsigned)sizeof(u32), dump[i]);
|
||
}
|
||
|
||
return n;
|
||
}
|
||
|
||
/**
|
||
* store_registers: writes value to register address
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t store_registers(struct device *dev,
|
||
struct device_attribute *attr,
|
||
const char *buf, size_t count)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long addr, data, flags;
|
||
|
||
dbg_trace("[%s] %p, %d\n", __func__, buf, count);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
goto done;
|
||
}
|
||
|
||
if (sscanf(buf, "%li %li", &addr, &data) != 2) {
|
||
dev_err(dev, "<addr> <data>: write data to register address");
|
||
goto done;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
if (hw_register_write(addr, data))
|
||
dev_err(dev, "invalid address range\n");
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
done:
|
||
return count;
|
||
}
|
||
static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
|
||
show_registers, store_registers);
|
||
|
||
/**
|
||
* show_requests: DMA contents of all requests currently queued (all endpts)
|
||
*
|
||
* Check "device.h" for details
|
||
*/
|
||
static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
|
||
char *buf)
|
||
{
|
||
struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
|
||
unsigned long flags;
|
||
struct list_head *ptr = NULL;
|
||
struct ci13xxx_req *req = NULL;
|
||
unsigned i, j, k, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
|
||
|
||
dbg_trace("[%s] %p\n", __func__, buf);
|
||
if (attr == NULL || buf == NULL) {
|
||
dev_err(dev, "[%s] EINVAL\n", __func__);
|
||
return 0;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
for (i = 0; i < hw_ep_max; i++)
|
||
for (k = RX; k <= TX; k++)
|
||
list_for_each(ptr, &udc->ci13xxx_ep[i].qh[k].queue)
|
||
{
|
||
req = list_entry(ptr,
|
||
struct ci13xxx_req, queue);
|
||
|
||
n += scnprintf(buf + n, PAGE_SIZE - n,
|
||
"EP=%02i: TD=%08X %s\n",
|
||
i, (u32)req->dma,
|
||
((k == RX) ? "RX" : "TX"));
|
||
|
||
for (j = 0; j < qSize; j++)
|
||
n += scnprintf(buf + n, PAGE_SIZE - n,
|
||
" %04X: %08X\n", j,
|
||
*((u32 *)req->ptr + j));
|
||
}
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
return n;
|
||
}
|
||
static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
|
||
|
||
/**
|
||
* dbg_create_files: initializes the attribute interface
|
||
* @dev: device
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
__maybe_unused static int dbg_create_files(struct device *dev)
|
||
{
|
||
int retval = 0;
|
||
|
||
if (dev == NULL)
|
||
return -EINVAL;
|
||
retval = device_create_file(dev, &dev_attr_device);
|
||
if (retval)
|
||
goto done;
|
||
retval = device_create_file(dev, &dev_attr_driver);
|
||
if (retval)
|
||
goto rm_device;
|
||
retval = device_create_file(dev, &dev_attr_events);
|
||
if (retval)
|
||
goto rm_driver;
|
||
retval = device_create_file(dev, &dev_attr_inters);
|
||
if (retval)
|
||
goto rm_events;
|
||
retval = device_create_file(dev, &dev_attr_port_test);
|
||
if (retval)
|
||
goto rm_inters;
|
||
retval = device_create_file(dev, &dev_attr_qheads);
|
||
if (retval)
|
||
goto rm_port_test;
|
||
retval = device_create_file(dev, &dev_attr_registers);
|
||
if (retval)
|
||
goto rm_qheads;
|
||
retval = device_create_file(dev, &dev_attr_requests);
|
||
if (retval)
|
||
goto rm_registers;
|
||
return 0;
|
||
|
||
rm_registers:
|
||
device_remove_file(dev, &dev_attr_registers);
|
||
rm_qheads:
|
||
device_remove_file(dev, &dev_attr_qheads);
|
||
rm_port_test:
|
||
device_remove_file(dev, &dev_attr_port_test);
|
||
rm_inters:
|
||
device_remove_file(dev, &dev_attr_inters);
|
||
rm_events:
|
||
device_remove_file(dev, &dev_attr_events);
|
||
rm_driver:
|
||
device_remove_file(dev, &dev_attr_driver);
|
||
rm_device:
|
||
device_remove_file(dev, &dev_attr_device);
|
||
done:
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* dbg_remove_files: destroys the attribute interface
|
||
* @dev: device
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
__maybe_unused static int dbg_remove_files(struct device *dev)
|
||
{
|
||
if (dev == NULL)
|
||
return -EINVAL;
|
||
device_remove_file(dev, &dev_attr_requests);
|
||
device_remove_file(dev, &dev_attr_registers);
|
||
device_remove_file(dev, &dev_attr_qheads);
|
||
device_remove_file(dev, &dev_attr_port_test);
|
||
device_remove_file(dev, &dev_attr_inters);
|
||
device_remove_file(dev, &dev_attr_events);
|
||
device_remove_file(dev, &dev_attr_driver);
|
||
device_remove_file(dev, &dev_attr_device);
|
||
return 0;
|
||
}
|
||
|
||
/******************************************************************************
|
||
* UTIL block
|
||
*****************************************************************************/
|
||
/**
|
||
* _usb_addr: calculates endpoint address from direction & number
|
||
* @ep: endpoint
|
||
*/
|
||
static inline u8 _usb_addr(struct ci13xxx_ep *ep)
|
||
{
|
||
return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
|
||
}
|
||
|
||
/**
|
||
* _hardware_queue: configures a request at hardware level
|
||
* @gadget: gadget
|
||
* @mEp: endpoint
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
|
||
{
|
||
unsigned i;
|
||
|
||
trace("%p, %p", mEp, mReq);
|
||
|
||
/* don't queue twice */
|
||
if (mReq->req.status == -EALREADY)
|
||
return -EALREADY;
|
||
|
||
if (hw_ep_is_primed(mEp->num, mEp->dir))
|
||
return -EBUSY;
|
||
|
||
mReq->req.status = -EALREADY;
|
||
|
||
if (mReq->req.length && !mReq->req.dma) {
|
||
mReq->req.dma = \
|
||
dma_map_single(mEp->device, mReq->req.buf,
|
||
mReq->req.length, mEp->dir ?
|
||
DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
||
if (mReq->req.dma == 0)
|
||
return -ENOMEM;
|
||
|
||
mReq->map = 1;
|
||
}
|
||
|
||
/*
|
||
* TD configuration
|
||
* TODO - handle requests which spawns into several TDs
|
||
*/
|
||
memset(mReq->ptr, 0, sizeof(*mReq->ptr));
|
||
mReq->ptr->next |= TD_TERMINATE;
|
||
mReq->ptr->token = mReq->req.length << ffs_nr(TD_TOTAL_BYTES);
|
||
mReq->ptr->token &= TD_TOTAL_BYTES;
|
||
mReq->ptr->token |= TD_IOC;
|
||
mReq->ptr->token |= TD_STATUS_ACTIVE;
|
||
mReq->ptr->page[0] = mReq->req.dma;
|
||
for (i = 1; i < 5; i++)
|
||
mReq->ptr->page[i] =
|
||
(mReq->req.dma + i * PAGE_SIZE) & ~TD_RESERVED_MASK;
|
||
|
||
/*
|
||
* QH configuration
|
||
* At this point it's guaranteed exclusive access to qhead
|
||
* (endpt is not primed) so it's no need to use tripwire
|
||
*/
|
||
mEp->qh[mEp->dir].ptr->td.next = mReq->dma; /* TERMINATE = 0 */
|
||
mEp->qh[mEp->dir].ptr->td.token &= ~TD_STATUS; /* clear status */
|
||
if (mReq->req.zero == 0)
|
||
mEp->qh[mEp->dir].ptr->cap |= QH_ZLT;
|
||
else
|
||
mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
|
||
|
||
wmb(); /* synchronize before ep prime */
|
||
|
||
return hw_ep_prime(mEp->num, mEp->dir,
|
||
mEp->type == USB_ENDPOINT_XFER_CONTROL);
|
||
}
|
||
|
||
/**
|
||
* _hardware_dequeue: handles a request at hardware level
|
||
* @gadget: gadget
|
||
* @mEp: endpoint
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
|
||
{
|
||
trace("%p, %p", mEp, mReq);
|
||
|
||
if (mReq->req.status != -EALREADY)
|
||
return -EINVAL;
|
||
|
||
if (hw_ep_is_primed(mEp->num, mEp->dir))
|
||
hw_ep_flush(mEp->num, mEp->dir);
|
||
|
||
mReq->req.status = 0;
|
||
|
||
if (mReq->map) {
|
||
dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
|
||
mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
||
mReq->req.dma = 0;
|
||
mReq->map = 0;
|
||
}
|
||
|
||
mReq->req.status = mReq->ptr->token & TD_STATUS;
|
||
if ((TD_STATUS_ACTIVE & mReq->req.status) != 0)
|
||
mReq->req.status = -ECONNRESET;
|
||
else if ((TD_STATUS_HALTED & mReq->req.status) != 0)
|
||
mReq->req.status = -1;
|
||
else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
|
||
mReq->req.status = -1;
|
||
else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
|
||
mReq->req.status = -1;
|
||
|
||
mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
|
||
mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
|
||
mReq->req.actual = mReq->req.length - mReq->req.actual;
|
||
mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
|
||
|
||
return mReq->req.actual;
|
||
}
|
||
|
||
/**
|
||
* _ep_nuke: dequeues all endpoint requests
|
||
* @mEp: endpoint
|
||
*
|
||
* This function returns an error code
|
||
* Caller must hold lock
|
||
*/
|
||
static int _ep_nuke(struct ci13xxx_ep *mEp)
|
||
__releases(mEp->lock)
|
||
__acquires(mEp->lock)
|
||
{
|
||
trace("%p", mEp);
|
||
|
||
if (mEp == NULL)
|
||
return -EINVAL;
|
||
|
||
hw_ep_flush(mEp->num, mEp->dir);
|
||
|
||
while (!list_empty(&mEp->qh[mEp->dir].queue)) {
|
||
|
||
/* pop oldest request */
|
||
struct ci13xxx_req *mReq = \
|
||
list_entry(mEp->qh[mEp->dir].queue.next,
|
||
struct ci13xxx_req, queue);
|
||
list_del_init(&mReq->queue);
|
||
mReq->req.status = -ESHUTDOWN;
|
||
|
||
if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
|
||
spin_unlock(mEp->lock);
|
||
mReq->req.complete(&mEp->ep, &mReq->req);
|
||
spin_lock(mEp->lock);
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
|
||
* @gadget: gadget
|
||
*
|
||
* This function returns an error code
|
||
* Caller must hold lock
|
||
*/
|
||
static int _gadget_stop_activity(struct usb_gadget *gadget)
|
||
__releases(udc->lock)
|
||
__acquires(udc->lock)
|
||
{
|
||
struct usb_ep *ep;
|
||
struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
|
||
struct ci13xxx_ep *mEp = container_of(gadget->ep0,
|
||
struct ci13xxx_ep, ep);
|
||
|
||
trace("%p", gadget);
|
||
|
||
if (gadget == NULL)
|
||
return -EINVAL;
|
||
|
||
spin_unlock(udc->lock);
|
||
|
||
/* flush all endpoints */
|
||
gadget_for_each_ep(ep, gadget) {
|
||
usb_ep_fifo_flush(ep);
|
||
}
|
||
usb_ep_fifo_flush(gadget->ep0);
|
||
|
||
udc->driver->disconnect(gadget);
|
||
|
||
/* make sure to disable all endpoints */
|
||
gadget_for_each_ep(ep, gadget) {
|
||
usb_ep_disable(ep);
|
||
}
|
||
usb_ep_disable(gadget->ep0);
|
||
|
||
if (mEp->status != NULL) {
|
||
usb_ep_free_request(gadget->ep0, mEp->status);
|
||
mEp->status = NULL;
|
||
}
|
||
|
||
spin_lock(udc->lock);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/******************************************************************************
|
||
* ISR block
|
||
*****************************************************************************/
|
||
/**
|
||
* isr_reset_handler: USB reset interrupt handler
|
||
* @udc: UDC device
|
||
*
|
||
* This function resets USB engine after a bus reset occurred
|
||
*/
|
||
static void isr_reset_handler(struct ci13xxx *udc)
|
||
__releases(udc->lock)
|
||
__acquires(udc->lock)
|
||
{
|
||
struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[0];
|
||
int retval;
|
||
|
||
trace("%p", udc);
|
||
|
||
if (udc == NULL) {
|
||
err("EINVAL");
|
||
return;
|
||
}
|
||
|
||
dbg_event(0xFF, "BUS RST", 0);
|
||
|
||
retval = _gadget_stop_activity(&udc->gadget);
|
||
if (retval)
|
||
goto done;
|
||
|
||
retval = hw_usb_reset();
|
||
if (retval)
|
||
goto done;
|
||
|
||
spin_unlock(udc->lock);
|
||
retval = usb_ep_enable(&mEp->ep, &ctrl_endpt_desc);
|
||
if (!retval) {
|
||
mEp->status = usb_ep_alloc_request(&mEp->ep, GFP_KERNEL);
|
||
if (mEp->status == NULL) {
|
||
usb_ep_disable(&mEp->ep);
|
||
retval = -ENOMEM;
|
||
}
|
||
}
|
||
spin_lock(udc->lock);
|
||
|
||
done:
|
||
if (retval)
|
||
err("error: %i", retval);
|
||
}
|
||
|
||
/**
|
||
* isr_get_status_complete: get_status request complete function
|
||
* @ep: endpoint
|
||
* @req: request handled
|
||
*
|
||
* Caller must release lock
|
||
*/
|
||
static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
|
||
{
|
||
trace("%p, %p", ep, req);
|
||
|
||
if (ep == NULL || req == NULL) {
|
||
err("EINVAL");
|
||
return;
|
||
}
|
||
|
||
kfree(req->buf);
|
||
usb_ep_free_request(ep, req);
|
||
}
|
||
|
||
/**
|
||
* isr_get_status_response: get_status request response
|
||
* @ep: endpoint
|
||
* @setup: setup request packet
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int isr_get_status_response(struct ci13xxx_ep *mEp,
|
||
struct usb_ctrlrequest *setup)
|
||
__releases(mEp->lock)
|
||
__acquires(mEp->lock)
|
||
{
|
||
struct usb_request *req = NULL;
|
||
gfp_t gfp_flags = GFP_ATOMIC;
|
||
int dir, num, retval;
|
||
|
||
trace("%p, %p", mEp, setup);
|
||
|
||
if (mEp == NULL || setup == NULL)
|
||
return -EINVAL;
|
||
|
||
spin_unlock(mEp->lock);
|
||
req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
|
||
spin_lock(mEp->lock);
|
||
if (req == NULL)
|
||
return -ENOMEM;
|
||
|
||
req->complete = isr_get_status_complete;
|
||
req->length = 2;
|
||
req->buf = kzalloc(req->length, gfp_flags);
|
||
if (req->buf == NULL) {
|
||
retval = -ENOMEM;
|
||
goto err_free_req;
|
||
}
|
||
|
||
if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
|
||
/* TODO: D1 - Remote Wakeup; D0 - Self Powered */
|
||
retval = 0;
|
||
} else if ((setup->bRequestType & USB_RECIP_MASK) \
|
||
== USB_RECIP_ENDPOINT) {
|
||
dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
|
||
TX : RX;
|
||
num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
|
||
*((u16 *)req->buf) = hw_ep_get_halt(num, dir);
|
||
}
|
||
/* else do nothing; reserved for future use */
|
||
|
||
spin_unlock(mEp->lock);
|
||
retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
|
||
spin_lock(mEp->lock);
|
||
if (retval)
|
||
goto err_free_buf;
|
||
|
||
return 0;
|
||
|
||
err_free_buf:
|
||
kfree(req->buf);
|
||
err_free_req:
|
||
spin_unlock(mEp->lock);
|
||
usb_ep_free_request(&mEp->ep, req);
|
||
spin_lock(mEp->lock);
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* isr_setup_status_phase: queues the status phase of a setup transation
|
||
* @mEp: endpoint
|
||
*
|
||
* This function returns an error code
|
||
*/
|
||
static int isr_setup_status_phase(struct ci13xxx_ep *mEp)
|
||
__releases(mEp->lock)
|
||
__acquires(mEp->lock)
|
||
{
|
||
int retval;
|
||
|
||
trace("%p", mEp);
|
||
|
||
/* mEp is always valid & configured */
|
||
|
||
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
|
||
mEp->dir = (mEp->dir == TX) ? RX : TX;
|
||
|
||
mEp->status->no_interrupt = 1;
|
||
|
||
spin_unlock(mEp->lock);
|
||
retval = usb_ep_queue(&mEp->ep, mEp->status, GFP_ATOMIC);
|
||
spin_lock(mEp->lock);
|
||
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* isr_tr_complete_low: transaction complete low level handler
|
||
* @mEp: endpoint
|
||
*
|
||
* This function returns an error code
|
||
* Caller must hold lock
|
||
*/
|
||
static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
|
||
__releases(mEp->lock)
|
||
__acquires(mEp->lock)
|
||
{
|
||
struct ci13xxx_req *mReq;
|
||
int retval;
|
||
|
||
trace("%p", mEp);
|
||
|
||
if (list_empty(&mEp->qh[mEp->dir].queue))
|
||
return -EINVAL;
|
||
|
||
/* pop oldest request */
|
||
mReq = list_entry(mEp->qh[mEp->dir].queue.next,
|
||
struct ci13xxx_req, queue);
|
||
list_del_init(&mReq->queue);
|
||
|
||
retval = _hardware_dequeue(mEp, mReq);
|
||
if (retval < 0) {
|
||
dbg_event(_usb_addr(mEp), "DONE", retval);
|
||
goto done;
|
||
}
|
||
|
||
dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
|
||
|
||
if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
|
||
spin_unlock(mEp->lock);
|
||
mReq->req.complete(&mEp->ep, &mReq->req);
|
||
spin_lock(mEp->lock);
|
||
}
|
||
|
||
if (!list_empty(&mEp->qh[mEp->dir].queue)) {
|
||
mReq = list_entry(mEp->qh[mEp->dir].queue.next,
|
||
struct ci13xxx_req, queue);
|
||
_hardware_enqueue(mEp, mReq);
|
||
}
|
||
|
||
done:
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* isr_tr_complete_handler: transaction complete interrupt handler
|
||
* @udc: UDC descriptor
|
||
*
|
||
* This function handles traffic events
|
||
*/
|
||
static void isr_tr_complete_handler(struct ci13xxx *udc)
|
||
__releases(udc->lock)
|
||
__acquires(udc->lock)
|
||
{
|
||
unsigned i;
|
||
|
||
trace("%p", udc);
|
||
|
||
if (udc == NULL) {
|
||
err("EINVAL");
|
||
return;
|
||
}
|
||
|
||
for (i = 0; i < hw_ep_max; i++) {
|
||
struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
|
||
int type, num, err = -EINVAL;
|
||
struct usb_ctrlrequest req;
|
||
|
||
|
||
if (mEp->desc == NULL)
|
||
continue; /* not configured */
|
||
|
||
if ((mEp->dir == RX && hw_test_and_clear_complete(i)) ||
|
||
(mEp->dir == TX && hw_test_and_clear_complete(i + 16))) {
|
||
err = isr_tr_complete_low(mEp);
|
||
if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
|
||
if (err > 0) /* needs status phase */
|
||
err = isr_setup_status_phase(mEp);
|
||
if (err < 0) {
|
||
dbg_event(_usb_addr(mEp),
|
||
"ERROR", err);
|
||
spin_unlock(udc->lock);
|
||
if (usb_ep_set_halt(&mEp->ep))
|
||
err("error: ep_set_halt");
|
||
spin_lock(udc->lock);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
|
||
!hw_test_and_clear_setup_status(i))
|
||
continue;
|
||
|
||
if (i != 0) {
|
||
warn("ctrl traffic received at endpoint");
|
||
continue;
|
||
}
|
||
|
||
/* read_setup_packet */
|
||
do {
|
||
hw_test_and_set_setup_guard();
|
||
memcpy(&req, &mEp->qh[RX].ptr->setup, sizeof(req));
|
||
} while (!hw_test_and_clear_setup_guard());
|
||
|
||
type = req.bRequestType;
|
||
|
||
mEp->dir = (type & USB_DIR_IN) ? TX : RX;
|
||
|
||
dbg_setup(_usb_addr(mEp), &req);
|
||
|
||
switch (req.bRequest) {
|
||
case USB_REQ_CLEAR_FEATURE:
|
||
if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
|
||
le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
|
||
goto delegate;
|
||
if (req.wLength != 0)
|
||
break;
|
||
num = le16_to_cpu(req.wIndex);
|
||
num &= USB_ENDPOINT_NUMBER_MASK;
|
||
if (!udc->ci13xxx_ep[num].wedge) {
|
||
spin_unlock(udc->lock);
|
||
err = usb_ep_clear_halt(
|
||
&udc->ci13xxx_ep[num].ep);
|
||
spin_lock(udc->lock);
|
||
if (err)
|
||
break;
|
||
}
|
||
err = isr_setup_status_phase(mEp);
|
||
break;
|
||
case USB_REQ_GET_STATUS:
|
||
if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
|
||
type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
|
||
type != (USB_DIR_IN|USB_RECIP_INTERFACE))
|
||
goto delegate;
|
||
if (le16_to_cpu(req.wLength) != 2 ||
|
||
le16_to_cpu(req.wValue) != 0)
|
||
break;
|
||
err = isr_get_status_response(mEp, &req);
|
||
break;
|
||
case USB_REQ_SET_ADDRESS:
|
||
if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
|
||
goto delegate;
|
||
if (le16_to_cpu(req.wLength) != 0 ||
|
||
le16_to_cpu(req.wIndex) != 0)
|
||
break;
|
||
err = hw_usb_set_address((u8)le16_to_cpu(req.wValue));
|
||
if (err)
|
||
break;
|
||
err = isr_setup_status_phase(mEp);
|
||
break;
|
||
case USB_REQ_SET_FEATURE:
|
||
if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
|
||
le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
|
||
goto delegate;
|
||
if (req.wLength != 0)
|
||
break;
|
||
num = le16_to_cpu(req.wIndex);
|
||
num &= USB_ENDPOINT_NUMBER_MASK;
|
||
|
||
spin_unlock(udc->lock);
|
||
err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
|
||
spin_lock(udc->lock);
|
||
if (err)
|
||
break;
|
||
err = isr_setup_status_phase(mEp);
|
||
break;
|
||
default:
|
||
delegate:
|
||
if (req.wLength == 0) /* no data phase */
|
||
mEp->dir = TX;
|
||
|
||
spin_unlock(udc->lock);
|
||
err = udc->driver->setup(&udc->gadget, &req);
|
||
spin_lock(udc->lock);
|
||
break;
|
||
}
|
||
|
||
if (err < 0) {
|
||
dbg_event(_usb_addr(mEp), "ERROR", err);
|
||
|
||
spin_unlock(udc->lock);
|
||
if (usb_ep_set_halt(&mEp->ep))
|
||
err("error: ep_set_halt");
|
||
spin_lock(udc->lock);
|
||
}
|
||
}
|
||
}
|
||
|
||
/******************************************************************************
|
||
* ENDPT block
|
||
*****************************************************************************/
|
||
/**
|
||
* ep_enable: configure endpoint, making it usable
|
||
*
|
||
* Check usb_ep_enable() at "usb_gadget.h" for details
|
||
*/
|
||
static int ep_enable(struct usb_ep *ep,
|
||
const struct usb_endpoint_descriptor *desc)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
int direction, retval = 0;
|
||
unsigned long flags;
|
||
|
||
trace("%p, %p", ep, desc);
|
||
|
||
if (ep == NULL || desc == NULL)
|
||
return -EINVAL;
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
/* only internal SW should enable ctrl endpts */
|
||
|
||
mEp->desc = desc;
|
||
|
||
if (!list_empty(&mEp->qh[mEp->dir].queue))
|
||
warn("enabling a non-empty endpoint!");
|
||
|
||
mEp->dir = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? TX : RX;
|
||
mEp->num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
||
mEp->type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
|
||
|
||
mEp->ep.maxpacket = __constant_le16_to_cpu(desc->wMaxPacketSize);
|
||
|
||
direction = mEp->dir;
|
||
do {
|
||
dbg_event(_usb_addr(mEp), "ENABLE", 0);
|
||
|
||
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
|
||
mEp->qh[mEp->dir].ptr->cap |= QH_IOS;
|
||
else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
|
||
mEp->qh[mEp->dir].ptr->cap &= ~QH_MULT;
|
||
else
|
||
mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
|
||
|
||
mEp->qh[mEp->dir].ptr->cap |=
|
||
(mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
|
||
mEp->qh[mEp->dir].ptr->td.next |= TD_TERMINATE; /* needed? */
|
||
|
||
retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
|
||
|
||
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
|
||
mEp->dir = (mEp->dir == TX) ? RX : TX;
|
||
|
||
} while (mEp->dir != direction);
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* ep_disable: endpoint is no longer usable
|
||
*
|
||
* Check usb_ep_disable() at "usb_gadget.h" for details
|
||
*/
|
||
static int ep_disable(struct usb_ep *ep)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
int direction, retval = 0;
|
||
unsigned long flags;
|
||
|
||
trace("%p", ep);
|
||
|
||
if (ep == NULL)
|
||
return -EINVAL;
|
||
else if (mEp->desc == NULL)
|
||
return -EBUSY;
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
/* only internal SW should disable ctrl endpts */
|
||
|
||
direction = mEp->dir;
|
||
do {
|
||
dbg_event(_usb_addr(mEp), "DISABLE", 0);
|
||
|
||
retval |= _ep_nuke(mEp);
|
||
retval |= hw_ep_disable(mEp->num, mEp->dir);
|
||
|
||
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
|
||
mEp->dir = (mEp->dir == TX) ? RX : TX;
|
||
|
||
} while (mEp->dir != direction);
|
||
|
||
mEp->desc = NULL;
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* ep_alloc_request: allocate a request object to use with this endpoint
|
||
*
|
||
* Check usb_ep_alloc_request() at "usb_gadget.h" for details
|
||
*/
|
||
static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
struct ci13xxx_req *mReq = NULL;
|
||
unsigned long flags;
|
||
|
||
trace("%p, %i", ep, gfp_flags);
|
||
|
||
if (ep == NULL) {
|
||
err("EINVAL");
|
||
return NULL;
|
||
}
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
|
||
if (mReq != NULL) {
|
||
INIT_LIST_HEAD(&mReq->queue);
|
||
|
||
mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
|
||
&mReq->dma);
|
||
if (mReq->ptr == NULL) {
|
||
kfree(mReq);
|
||
mReq = NULL;
|
||
}
|
||
}
|
||
|
||
dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
|
||
return (mReq == NULL) ? NULL : &mReq->req;
|
||
}
|
||
|
||
/**
|
||
* ep_free_request: frees a request object
|
||
*
|
||
* Check usb_ep_free_request() at "usb_gadget.h" for details
|
||
*/
|
||
static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
|
||
unsigned long flags;
|
||
|
||
trace("%p, %p", ep, req);
|
||
|
||
if (ep == NULL || req == NULL) {
|
||
err("EINVAL");
|
||
return;
|
||
} else if (!list_empty(&mReq->queue)) {
|
||
err("EBUSY");
|
||
return;
|
||
}
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
if (mReq->ptr)
|
||
dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
|
||
kfree(mReq);
|
||
|
||
dbg_event(_usb_addr(mEp), "FREE", 0);
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
}
|
||
|
||
/**
|
||
* ep_queue: queues (submits) an I/O request to an endpoint
|
||
*
|
||
* Check usb_ep_queue()* at usb_gadget.h" for details
|
||
*/
|
||
static int ep_queue(struct usb_ep *ep, struct usb_request *req,
|
||
gfp_t __maybe_unused gfp_flags)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
|
||
int retval = 0;
|
||
unsigned long flags;
|
||
|
||
trace("%p, %p, %X", ep, req, gfp_flags);
|
||
|
||
if (ep == NULL || req == NULL || mEp->desc == NULL)
|
||
return -EINVAL;
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
if (mEp->type == USB_ENDPOINT_XFER_CONTROL &&
|
||
!list_empty(&mEp->qh[mEp->dir].queue)) {
|
||
_ep_nuke(mEp);
|
||
retval = -EOVERFLOW;
|
||
warn("endpoint ctrl %X nuked", _usb_addr(mEp));
|
||
}
|
||
|
||
/* first nuke then test link, e.g. previous status has not sent */
|
||
if (!list_empty(&mReq->queue)) {
|
||
retval = -EBUSY;
|
||
err("request already in queue");
|
||
goto done;
|
||
}
|
||
|
||
if (req->length > (4 * PAGE_SIZE)) {
|
||
req->length = (4 * PAGE_SIZE);
|
||
retval = -EMSGSIZE;
|
||
warn("request length truncated");
|
||
}
|
||
|
||
dbg_queue(_usb_addr(mEp), req, retval);
|
||
|
||
/* push request */
|
||
mReq->req.status = -EINPROGRESS;
|
||
mReq->req.actual = 0;
|
||
list_add_tail(&mReq->queue, &mEp->qh[mEp->dir].queue);
|
||
|
||
retval = _hardware_enqueue(mEp, mReq);
|
||
if (retval == -EALREADY || retval == -EBUSY) {
|
||
dbg_event(_usb_addr(mEp), "QUEUE", retval);
|
||
retval = 0;
|
||
}
|
||
|
||
done:
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
|
||
*
|
||
* Check usb_ep_dequeue() at "usb_gadget.h" for details
|
||
*/
|
||
static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
|
||
unsigned long flags;
|
||
|
||
trace("%p, %p", ep, req);
|
||
|
||
if (ep == NULL || req == NULL || mEp->desc == NULL ||
|
||
list_empty(&mReq->queue) || list_empty(&mEp->qh[mEp->dir].queue))
|
||
return -EINVAL;
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
|
||
|
||
if (mReq->req.status == -EALREADY)
|
||
_hardware_dequeue(mEp, mReq);
|
||
|
||
/* pop request */
|
||
list_del_init(&mReq->queue);
|
||
req->status = -ECONNRESET;
|
||
|
||
if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
|
||
spin_unlock(mEp->lock);
|
||
mReq->req.complete(&mEp->ep, &mReq->req);
|
||
spin_lock(mEp->lock);
|
||
}
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* ep_set_halt: sets the endpoint halt feature
|
||
*
|
||
* Check usb_ep_set_halt() at "usb_gadget.h" for details
|
||
*/
|
||
static int ep_set_halt(struct usb_ep *ep, int value)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
int direction, retval = 0;
|
||
unsigned long flags;
|
||
|
||
trace("%p, %i", ep, value);
|
||
|
||
if (ep == NULL || mEp->desc == NULL)
|
||
return -EINVAL;
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
#ifndef STALL_IN
|
||
/* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
|
||
if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
|
||
!list_empty(&mEp->qh[mEp->dir].queue)) {
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
return -EAGAIN;
|
||
}
|
||
#endif
|
||
|
||
direction = mEp->dir;
|
||
do {
|
||
dbg_event(_usb_addr(mEp), "HALT", value);
|
||
retval |= hw_ep_set_halt(mEp->num, mEp->dir, value);
|
||
|
||
if (!value)
|
||
mEp->wedge = 0;
|
||
|
||
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
|
||
mEp->dir = (mEp->dir == TX) ? RX : TX;
|
||
|
||
} while (mEp->dir != direction);
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* ep_set_wedge: sets the halt feature and ignores clear requests
|
||
*
|
||
* Check usb_ep_set_wedge() at "usb_gadget.h" for details
|
||
*/
|
||
static int ep_set_wedge(struct usb_ep *ep)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
unsigned long flags;
|
||
|
||
trace("%p", ep);
|
||
|
||
if (ep == NULL || mEp->desc == NULL)
|
||
return -EINVAL;
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
dbg_event(_usb_addr(mEp), "WEDGE", 0);
|
||
mEp->wedge = 1;
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
|
||
return usb_ep_set_halt(ep);
|
||
}
|
||
|
||
/**
|
||
* ep_fifo_flush: flushes contents of a fifo
|
||
*
|
||
* Check usb_ep_fifo_flush() at "usb_gadget.h" for details
|
||
*/
|
||
static void ep_fifo_flush(struct usb_ep *ep)
|
||
{
|
||
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
|
||
unsigned long flags;
|
||
|
||
trace("%p", ep);
|
||
|
||
if (ep == NULL) {
|
||
err("%02X: -EINVAL", _usb_addr(mEp));
|
||
return;
|
||
}
|
||
|
||
spin_lock_irqsave(mEp->lock, flags);
|
||
|
||
dbg_event(_usb_addr(mEp), "FFLUSH", 0);
|
||
hw_ep_flush(mEp->num, mEp->dir);
|
||
|
||
spin_unlock_irqrestore(mEp->lock, flags);
|
||
}
|
||
|
||
/**
|
||
* Endpoint-specific part of the API to the USB controller hardware
|
||
* Check "usb_gadget.h" for details
|
||
*/
|
||
static const struct usb_ep_ops usb_ep_ops = {
|
||
.enable = ep_enable,
|
||
.disable = ep_disable,
|
||
.alloc_request = ep_alloc_request,
|
||
.free_request = ep_free_request,
|
||
.queue = ep_queue,
|
||
.dequeue = ep_dequeue,
|
||
.set_halt = ep_set_halt,
|
||
.set_wedge = ep_set_wedge,
|
||
.fifo_flush = ep_fifo_flush,
|
||
};
|
||
|
||
/******************************************************************************
|
||
* GADGET block
|
||
*****************************************************************************/
|
||
/**
|
||
* Device operations part of the API to the USB controller hardware,
|
||
* which don't involve endpoints (or i/o)
|
||
* Check "usb_gadget.h" for details
|
||
*/
|
||
static const struct usb_gadget_ops usb_gadget_ops;
|
||
|
||
/**
|
||
* usb_gadget_register_driver: register a gadget driver
|
||
*
|
||
* Check usb_gadget_register_driver() at "usb_gadget.h" for details
|
||
* Interrupts are enabled here
|
||
*/
|
||
int usb_gadget_register_driver(struct usb_gadget_driver *driver)
|
||
{
|
||
struct ci13xxx *udc = _udc;
|
||
unsigned long i, k, flags;
|
||
int retval = -ENOMEM;
|
||
|
||
trace("%p", driver);
|
||
|
||
if (driver == NULL ||
|
||
driver->bind == NULL ||
|
||
driver->unbind == NULL ||
|
||
driver->setup == NULL ||
|
||
driver->disconnect == NULL ||
|
||
driver->suspend == NULL ||
|
||
driver->resume == NULL)
|
||
return -EINVAL;
|
||
else if (udc == NULL)
|
||
return -ENODEV;
|
||
else if (udc->driver != NULL)
|
||
return -EBUSY;
|
||
|
||
/* alloc resources */
|
||
udc->qh_pool = dma_pool_create("ci13xxx_qh", &udc->gadget.dev,
|
||
sizeof(struct ci13xxx_qh),
|
||
64, PAGE_SIZE);
|
||
if (udc->qh_pool == NULL)
|
||
return -ENOMEM;
|
||
|
||
udc->td_pool = dma_pool_create("ci13xxx_td", &udc->gadget.dev,
|
||
sizeof(struct ci13xxx_td),
|
||
64, PAGE_SIZE);
|
||
if (udc->td_pool == NULL) {
|
||
dma_pool_destroy(udc->qh_pool);
|
||
udc->qh_pool = NULL;
|
||
return -ENOMEM;
|
||
}
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
|
||
info("hw_ep_max = %d", hw_ep_max);
|
||
|
||
udc->driver = driver;
|
||
udc->gadget.ops = NULL;
|
||
udc->gadget.dev.driver = NULL;
|
||
|
||
retval = 0;
|
||
for (i = 0; i < hw_ep_max; i++) {
|
||
struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
|
||
|
||
scnprintf(mEp->name, sizeof(mEp->name), "ep%i", (int)i);
|
||
|
||
mEp->lock = udc->lock;
|
||
mEp->device = &udc->gadget.dev;
|
||
mEp->td_pool = udc->td_pool;
|
||
|
||
mEp->ep.name = mEp->name;
|
||
mEp->ep.ops = &usb_ep_ops;
|
||
mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
|
||
|
||
/* this allocation cannot be random */
|
||
for (k = RX; k <= TX; k++) {
|
||
INIT_LIST_HEAD(&mEp->qh[k].queue);
|
||
mEp->qh[k].ptr = dma_pool_alloc(udc->qh_pool,
|
||
GFP_KERNEL,
|
||
&mEp->qh[k].dma);
|
||
if (mEp->qh[k].ptr == NULL)
|
||
retval = -ENOMEM;
|
||
else
|
||
memset(mEp->qh[k].ptr, 0,
|
||
sizeof(*mEp->qh[k].ptr));
|
||
}
|
||
if (i == 0)
|
||
udc->gadget.ep0 = &mEp->ep;
|
||
else
|
||
list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list);
|
||
}
|
||
if (retval)
|
||
goto done;
|
||
|
||
/* bind gadget */
|
||
driver->driver.bus = NULL;
|
||
udc->gadget.ops = &usb_gadget_ops;
|
||
udc->gadget.dev.driver = &driver->driver;
|
||
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
retval = driver->bind(&udc->gadget); /* MAY SLEEP */
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
|
||
if (retval) {
|
||
udc->gadget.ops = NULL;
|
||
udc->gadget.dev.driver = NULL;
|
||
goto done;
|
||
}
|
||
|
||
retval = hw_device_state(udc->ci13xxx_ep[0].qh[RX].dma);
|
||
|
||
done:
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
if (retval)
|
||
usb_gadget_unregister_driver(driver);
|
||
return retval;
|
||
}
|
||
EXPORT_SYMBOL(usb_gadget_register_driver);
|
||
|
||
/**
|
||
* usb_gadget_unregister_driver: unregister a gadget driver
|
||
*
|
||
* Check usb_gadget_unregister_driver() at "usb_gadget.h" for details
|
||
*/
|
||
int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
|
||
{
|
||
struct ci13xxx *udc = _udc;
|
||
unsigned long i, k, flags;
|
||
|
||
trace("%p", driver);
|
||
|
||
if (driver == NULL ||
|
||
driver->bind == NULL ||
|
||
driver->unbind == NULL ||
|
||
driver->setup == NULL ||
|
||
driver->disconnect == NULL ||
|
||
driver->suspend == NULL ||
|
||
driver->resume == NULL ||
|
||
driver != udc->driver)
|
||
return -EINVAL;
|
||
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
|
||
hw_device_state(0);
|
||
|
||
/* unbind gadget */
|
||
if (udc->gadget.ops != NULL) {
|
||
_gadget_stop_activity(&udc->gadget);
|
||
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
driver->unbind(&udc->gadget); /* MAY SLEEP */
|
||
spin_lock_irqsave(udc->lock, flags);
|
||
|
||
udc->gadget.ops = NULL;
|
||
udc->gadget.dev.driver = NULL;
|
||
}
|
||
|
||
/* free resources */
|
||
for (i = 0; i < hw_ep_max; i++) {
|
||
struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
|
||
|
||
if (i == 0)
|
||
udc->gadget.ep0 = NULL;
|
||
else if (!list_empty(&mEp->ep.ep_list))
|
||
list_del_init(&mEp->ep.ep_list);
|
||
|
||
for (k = RX; k <= TX; k++)
|
||
if (mEp->qh[k].ptr != NULL)
|
||
dma_pool_free(udc->qh_pool,
|
||
mEp->qh[k].ptr, mEp->qh[k].dma);
|
||
}
|
||
|
||
udc->driver = NULL;
|
||
|
||
spin_unlock_irqrestore(udc->lock, flags);
|
||
|
||
if (udc->td_pool != NULL) {
|
||
dma_pool_destroy(udc->td_pool);
|
||
udc->td_pool = NULL;
|
||
}
|
||
if (udc->qh_pool != NULL) {
|
||
dma_pool_destroy(udc->qh_pool);
|
||
udc->qh_pool = NULL;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL(usb_gadget_unregister_driver);
|
||
|
||
/******************************************************************************
|
||
* BUS block
|
||
*****************************************************************************/
|
||
/**
|
||
* udc_irq: global interrupt handler
|
||
*
|
||
* This function returns IRQ_HANDLED if the IRQ has been handled
|
||
* It locks access to registers
|
||
*/
|
||
static irqreturn_t udc_irq(void)
|
||
{
|
||
struct ci13xxx *udc = _udc;
|
||
irqreturn_t retval;
|
||
u32 intr;
|
||
|
||
trace();
|
||
|
||
if (udc == NULL) {
|
||
err("ENODEV");
|
||
return IRQ_HANDLED;
|
||
}
|
||
|
||
spin_lock(udc->lock);
|
||
intr = hw_test_and_clear_intr_active();
|
||
if (intr) {
|
||
isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr;
|
||
isr_statistics.hndl.idx &= ISR_MASK;
|
||
isr_statistics.hndl.cnt++;
|
||
|
||
/* order defines priority - do NOT change it */
|
||
if (USBi_URI & intr) {
|
||
isr_statistics.uri++;
|
||
isr_reset_handler(udc);
|
||
}
|
||
if (USBi_PCI & intr) {
|
||
isr_statistics.pci++;
|
||
udc->gadget.speed = hw_port_is_high_speed() ?
|
||
USB_SPEED_HIGH : USB_SPEED_FULL;
|
||
}
|
||
if (USBi_UEI & intr)
|
||
isr_statistics.uei++;
|
||
if (USBi_UI & intr) {
|
||
isr_statistics.ui++;
|
||
isr_tr_complete_handler(udc);
|
||
}
|
||
if (USBi_SLI & intr)
|
||
isr_statistics.sli++;
|
||
retval = IRQ_HANDLED;
|
||
} else {
|
||
isr_statistics.none++;
|
||
retval = IRQ_NONE;
|
||
}
|
||
spin_unlock(udc->lock);
|
||
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* udc_release: driver release function
|
||
* @dev: device
|
||
*
|
||
* Currently does nothing
|
||
*/
|
||
static void udc_release(struct device *dev)
|
||
{
|
||
trace("%p", dev);
|
||
|
||
if (dev == NULL)
|
||
err("EINVAL");
|
||
}
|
||
|
||
/**
|
||
* udc_probe: parent probe must call this to initialize UDC
|
||
* @dev: parent device
|
||
* @regs: registers base address
|
||
* @name: driver name
|
||
*
|
||
* This function returns an error code
|
||
* No interrupts active, the IRQ has not been requested yet
|
||
* Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask
|
||
*/
|
||
static int udc_probe(struct device *dev, void __iomem *regs, const char *name)
|
||
{
|
||
struct ci13xxx *udc;
|
||
int retval = 0;
|
||
|
||
trace("%p, %p, %p", dev, regs, name);
|
||
|
||
if (dev == NULL || regs == NULL || name == NULL)
|
||
return -EINVAL;
|
||
|
||
udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL);
|
||
if (udc == NULL)
|
||
return -ENOMEM;
|
||
|
||
udc->lock = &udc_lock;
|
||
|
||
retval = hw_device_reset(regs);
|
||
if (retval)
|
||
goto done;
|
||
|
||
udc->gadget.ops = NULL;
|
||
udc->gadget.speed = USB_SPEED_UNKNOWN;
|
||
udc->gadget.is_dualspeed = 1;
|
||
udc->gadget.is_otg = 0;
|
||
udc->gadget.name = name;
|
||
|
||
INIT_LIST_HEAD(&udc->gadget.ep_list);
|
||
udc->gadget.ep0 = NULL;
|
||
|
||
strcpy(udc->gadget.dev.bus_id, "gadget");
|
||
udc->gadget.dev.dma_mask = dev->dma_mask;
|
||
udc->gadget.dev.parent = dev;
|
||
udc->gadget.dev.release = udc_release;
|
||
|
||
retval = device_register(&udc->gadget.dev);
|
||
if (retval)
|
||
goto done;
|
||
|
||
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
|
||
retval = dbg_create_files(&udc->gadget.dev);
|
||
#endif
|
||
if (retval) {
|
||
device_unregister(&udc->gadget.dev);
|
||
goto done;
|
||
}
|
||
|
||
_udc = udc;
|
||
return retval;
|
||
|
||
done:
|
||
err("error = %i", retval);
|
||
kfree(udc);
|
||
_udc = NULL;
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* udc_remove: parent remove must call this to remove UDC
|
||
*
|
||
* No interrupts active, the IRQ has been released
|
||
*/
|
||
static void udc_remove(void)
|
||
{
|
||
struct ci13xxx *udc = _udc;
|
||
|
||
if (udc == NULL) {
|
||
err("EINVAL");
|
||
return;
|
||
}
|
||
|
||
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
|
||
dbg_remove_files(&udc->gadget.dev);
|
||
#endif
|
||
device_unregister(&udc->gadget.dev);
|
||
|
||
kfree(udc);
|
||
_udc = NULL;
|
||
}
|
||
|
||
/******************************************************************************
|
||
* PCI block
|
||
*****************************************************************************/
|
||
/**
|
||
* ci13xxx_pci_irq: interrut handler
|
||
* @irq: irq number
|
||
* @pdev: USB Device Controller interrupt source
|
||
*
|
||
* This function returns IRQ_HANDLED if the IRQ has been handled
|
||
* This is an ISR don't trace, use attribute interface instead
|
||
*/
|
||
static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev)
|
||
{
|
||
if (irq == 0) {
|
||
dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!");
|
||
return IRQ_HANDLED;
|
||
}
|
||
return udc_irq();
|
||
}
|
||
|
||
/**
|
||
* ci13xxx_pci_probe: PCI probe
|
||
* @pdev: USB device controller being probed
|
||
* @id: PCI hotplug ID connecting controller to UDC framework
|
||
*
|
||
* This function returns an error code
|
||
* Allocates basic PCI resources for this USB device controller, and then
|
||
* invokes the udc_probe() method to start the UDC associated with it
|
||
*/
|
||
static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
|
||
const struct pci_device_id *id)
|
||
{
|
||
void __iomem *regs = NULL;
|
||
int retval = 0;
|
||
|
||
if (id == NULL)
|
||
return -EINVAL;
|
||
|
||
retval = pci_enable_device(pdev);
|
||
if (retval)
|
||
goto done;
|
||
|
||
if (!pdev->irq) {
|
||
dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
|
||
retval = -ENODEV;
|
||
goto disable_device;
|
||
}
|
||
|
||
retval = pci_request_regions(pdev, UDC_DRIVER_NAME);
|
||
if (retval)
|
||
goto disable_device;
|
||
|
||
/* BAR 0 holds all the registers */
|
||
regs = pci_iomap(pdev, 0, 0);
|
||
if (!regs) {
|
||
dev_err(&pdev->dev, "Error mapping memory!");
|
||
retval = -EFAULT;
|
||
goto release_regions;
|
||
}
|
||
pci_set_drvdata(pdev, (__force void *)regs);
|
||
|
||
pci_set_master(pdev);
|
||
pci_try_set_mwi(pdev);
|
||
|
||
retval = udc_probe(&pdev->dev, regs, UDC_DRIVER_NAME);
|
||
if (retval)
|
||
goto iounmap;
|
||
|
||
/* our device does not have MSI capability */
|
||
|
||
retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED,
|
||
UDC_DRIVER_NAME, pdev);
|
||
if (retval)
|
||
goto gadget_remove;
|
||
|
||
return 0;
|
||
|
||
gadget_remove:
|
||
udc_remove();
|
||
iounmap:
|
||
pci_iounmap(pdev, regs);
|
||
release_regions:
|
||
pci_release_regions(pdev);
|
||
disable_device:
|
||
pci_disable_device(pdev);
|
||
done:
|
||
return retval;
|
||
}
|
||
|
||
/**
|
||
* ci13xxx_pci_remove: PCI remove
|
||
* @pdev: USB Device Controller being removed
|
||
*
|
||
* Reverses the effect of ci13xxx_pci_probe(),
|
||
* first invoking the udc_remove() and then releases
|
||
* all PCI resources allocated for this USB device controller
|
||
*/
|
||
static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
|
||
{
|
||
free_irq(pdev->irq, pdev);
|
||
udc_remove();
|
||
pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev));
|
||
pci_release_regions(pdev);
|
||
pci_disable_device(pdev);
|
||
}
|
||
|
||
/**
|
||
* PCI device table
|
||
* PCI device structure
|
||
*
|
||
* Check "pci.h" for details
|
||
*/
|
||
static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
|
||
{ PCI_DEVICE(0x153F, 0x1004) },
|
||
{ PCI_DEVICE(0x153F, 0x1006) },
|
||
{ 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
|
||
};
|
||
MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
|
||
|
||
static struct pci_driver ci13xxx_pci_driver = {
|
||
.name = UDC_DRIVER_NAME,
|
||
.id_table = ci13xxx_pci_id_table,
|
||
.probe = ci13xxx_pci_probe,
|
||
.remove = __devexit_p(ci13xxx_pci_remove),
|
||
};
|
||
|
||
/**
|
||
* ci13xxx_pci_init: module init
|
||
*
|
||
* Driver load
|
||
*/
|
||
static int __init ci13xxx_pci_init(void)
|
||
{
|
||
return pci_register_driver(&ci13xxx_pci_driver);
|
||
}
|
||
module_init(ci13xxx_pci_init);
|
||
|
||
/**
|
||
* ci13xxx_pci_exit: module exit
|
||
*
|
||
* Driver unload
|
||
*/
|
||
static void __exit ci13xxx_pci_exit(void)
|
||
{
|
||
pci_unregister_driver(&ci13xxx_pci_driver);
|
||
}
|
||
module_exit(ci13xxx_pci_exit);
|
||
|
||
MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
|
||
MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
|
||
MODULE_LICENSE("GPL");
|
||
MODULE_VERSION("June 2008");
|