config USB_CHIPIDEA
tristate "ChipIdea Highspeed Dual Role Controller"
- depends on USB && USB_GADGET
- select USB_GADGET_DUALSPEED
+ depends on USB
help
Say Y here if your system has a dual role high speed USB
controller based on ChipIdea silicon IP. Currently, only the
peripheral mode is supported.
When compiled dynamically, the module will be called ci-hdrc.ko.
+
+if USB_CHIPIDEA
+
+config USB_CHIPIDEA_UDC
+ bool "ChipIdea device controller"
+ depends on USB_GADGET
+ select USB_GADGET_DUALSPEED
+ help
+ Say Y here to enable device controller functionality of the
+ ChipIdea driver.
+
+config USB_CHIPIDEA_DEBUG
+ bool "ChipIdea driver debug"
+ help
+ Say Y here to enable debugging output of the ChipIdea driver.
+
+endif
obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc.o
-ci_hdrc-y := ci13xxx_udc.o
+ci_hdrc-y := core.o
+ci_hdrc-$(CONFIG_USB_CHIPIDEA_UDC) += udc.o
+ci_hdrc-$(CONFIG_USB_CHIPIDEA_DEBUG) += debug.o
ifneq ($(CONFIG_PCI),)
obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_pci.o
--- /dev/null
+/*
+ * bits.h - register bits of the ChipIdea USB IP core
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_BITS_H
+#define __DRIVERS_USB_CHIPIDEA_BITS_H
+
+/* HCCPARAMS */
+#define HCCPARAMS_LEN BIT(17)
+
+/* DCCPARAMS */
+#define DCCPARAMS_DEN (0x1F << 0)
+#define DCCPARAMS_DC BIT(7)
+
+/* TESTMODE */
+#define TESTMODE_FORCE BIT(0)
+
+/* USBCMD */
+#define USBCMD_RS BIT(0)
+#define USBCMD_RST BIT(1)
+#define USBCMD_SUTW BIT(13)
+#define USBCMD_ATDTW BIT(14)
+
+/* USBSTS & USBINTR */
+#define USBi_UI BIT(0)
+#define USBi_UEI BIT(1)
+#define USBi_PCI BIT(2)
+#define USBi_URI BIT(6)
+#define USBi_SLI BIT(8)
+
+/* DEVICEADDR */
+#define DEVICEADDR_USBADRA BIT(24)
+#define DEVICEADDR_USBADR (0x7FUL << 25)
+
+/* PORTSC */
+#define PORTSC_FPR BIT(6)
+#define PORTSC_SUSP BIT(7)
+#define PORTSC_HSP BIT(9)
+#define PORTSC_PTC (0x0FUL << 16)
+
+/* DEVLC */
+#define DEVLC_PSPD (0x03UL << 25)
+#define DEVLC_PSPD_HS (0x02UL << 25)
+
+/* USBMODE */
+#define USBMODE_CM (0x03UL << 0)
+#define USBMODE_CM_IDLE (0x00UL << 0)
+#define USBMODE_CM_DEVICE (0x02UL << 0)
+#define USBMODE_CM_HOST (0x03UL << 0)
+#define USBMODE_SLOM BIT(3)
+#define USBMODE_SDIS BIT(4)
+
+/* ENDPTCTRL */
+#define ENDPTCTRL_RXS BIT(0)
+#define ENDPTCTRL_RXT (0x03UL << 2)
+#define ENDPTCTRL_RXR BIT(6) /* reserved for port 0 */
+#define ENDPTCTRL_RXE BIT(7)
+#define ENDPTCTRL_TXS BIT(16)
+#define ENDPTCTRL_TXT (0x03UL << 18)
+#define ENDPTCTRL_TXR BIT(22) /* reserved for port 0 */
+#define ENDPTCTRL_TXE BIT(23)
+
+#endif /* __DRIVERS_USB_CHIPIDEA_BITS_H */
--- /dev/null
+/*
+ * ci.h - common structures, functions, and macros of the ChipIdea driver
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_CI_H
+#define __DRIVERS_USB_CHIPIDEA_CI_H
+
+#include <linux/list.h>
+#include <linux/usb/gadget.h>
+
+/******************************************************************************
+ * DEFINE
+ *****************************************************************************/
+#define DMA_ADDR_INVALID (~(dma_addr_t)0)
+#define CI13XXX_PAGE_SIZE 4096ul /* page size for TD's */
+#define ENDPT_MAX 32
+
+/******************************************************************************
+ * STRUCTURES
+ *****************************************************************************/
+/* Extension of usb_ep */
+struct ci13xxx_ep {
+ struct usb_ep ep;
+ u8 dir;
+ u8 num;
+ u8 type;
+ char name[16];
+ struct {
+ struct list_head queue;
+ struct ci13xxx_qh *ptr;
+ dma_addr_t dma;
+ } qh;
+ int wedge;
+
+ /* global resources */
+ struct ci13xxx *udc;
+ spinlock_t *lock;
+ struct device *device;
+ struct dma_pool *td_pool;
+};
+
+struct hw_bank {
+ unsigned lpm; /* is LPM? */
+ void __iomem *abs; /* bus map offset */
+ void __iomem *cap; /* bus map offset + CAP offset */
+ void __iomem *op; /* bus map offset + OP offset */
+ size_t size; /* bank size */
+ void __iomem **regmap;
+};
+
+/* CI13XXX UDC descriptor & global resources */
+struct ci13xxx {
+ spinlock_t lock; /* ctrl register bank access */
+ void __iomem *regs; /* registers address space */
+
+ struct dma_pool *qh_pool; /* DMA pool for queue heads */
+ struct dma_pool *td_pool; /* DMA pool for transfer descs */
+ struct usb_request *status; /* ep0 status request */
+
+ struct device *dev;
+ struct usb_gadget gadget; /* USB slave device */
+ struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
+ u32 ep0_dir; /* ep0 direction */
+ struct ci13xxx_ep *ep0out, *ep0in;
+ unsigned hw_ep_max; /* number of hw endpoints */
+
+ bool setaddr;
+ u8 address;
+ u8 remote_wakeup; /* Is remote wakeup feature
+ enabled by the host? */
+ u8 suspended; /* suspended by the host */
+ u8 test_mode; /* the selected test mode */
+
+ struct hw_bank hw_bank;
+ int irq;
+ struct usb_gadget_driver *driver; /* 3rd party gadget driver */
+ struct ci13xxx_udc_driver *udc_driver; /* device controller driver */
+ int vbus_active; /* is VBUS active */
+ struct usb_phy *transceiver; /* Transceiver struct */
+};
+
+/******************************************************************************
+ * REGISTERS
+ *****************************************************************************/
+/* register size */
+#define REG_BITS (32)
+
+/* register indices */
+enum ci13xxx_regs {
+ CAP_CAPLENGTH,
+ CAP_HCCPARAMS,
+ CAP_DCCPARAMS,
+ CAP_TESTMODE,
+ CAP_LAST = CAP_TESTMODE,
+ OP_USBCMD,
+ OP_USBSTS,
+ OP_USBINTR,
+ OP_DEVICEADDR,
+ OP_ENDPTLISTADDR,
+ OP_PORTSC,
+ OP_DEVLC,
+ OP_USBMODE,
+ OP_ENDPTSETUPSTAT,
+ OP_ENDPTPRIME,
+ OP_ENDPTFLUSH,
+ OP_ENDPTSTAT,
+ OP_ENDPTCOMPLETE,
+ OP_ENDPTCTRL,
+ /* endptctrl1..15 follow */
+ OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2,
+};
+
+
+/**
+ * ffs_nr: find first (least significant) bit set
+ * @x: the word to search
+ *
+ * This function returns bit number (instead of position)
+ */
+static inline int ffs_nr(u32 x)
+{
+ int n = ffs(x);
+
+ return n ? n-1 : 32;
+}
+
+/**
+ * hw_read: reads from a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_read(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask)
+{
+ return ioread32(udc->hw_bank.regmap[reg]) & mask;
+}
+
+/**
+ * hw_write: writes to a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ * @data: new value
+ */
+static inline void hw_write(struct ci13xxx *udc, enum ci13xxx_regs reg,
+ u32 mask, u32 data)
+{
+ if (~mask)
+ data = (ioread32(udc->hw_bank.regmap[reg]) & ~mask)
+ | (data & mask);
+
+ iowrite32(data, udc->hw_bank.regmap[reg]);
+}
+
+/**
+ * hw_test_and_clear: tests & clears a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_test_and_clear(struct ci13xxx *udc, enum ci13xxx_regs reg,
+ u32 mask)
+{
+ u32 val = ioread32(udc->hw_bank.regmap[reg]) & mask;
+
+ iowrite32(val, udc->hw_bank.regmap[reg]);
+ return val;
+}
+
+/**
+ * hw_test_and_write: tests & writes a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ * @data: new value
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_test_and_write(struct ci13xxx *udc, enum ci13xxx_regs reg,
+ u32 mask, u32 data)
+{
+ u32 val = hw_read(udc, reg, ~0);
+
+ hw_write(udc, reg, mask, data);
+ return (val & mask) >> ffs_nr(mask);
+}
+
+int hw_device_init(struct ci13xxx *udc, void __iomem *base,
+ uintptr_t cap_offset);
+int hw_device_reset(struct ci13xxx *ci);
+
+int hw_port_test_set(struct ci13xxx *ci, u8 mode);
+
+u8 hw_port_test_get(struct ci13xxx *ci);
+
+#endif /* __DRIVERS_USB_CHIPIDEA_CI_H */
#include <linux/usb/msm_hsusb_hw.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
+#include <linux/usb/chipidea.h>
-#include "ci13xxx_udc.h"
+#include "ci.h"
#define MSM_USB_BASE (udc->regs)
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/usb/gadget.h>
-
-#include "ci13xxx_udc.h"
+#include <linux/usb/chipidea.h>
/* driver name */
#define UDC_DRIVER_NAME "ci13xxx_pci"
+++ /dev/null
-/*
- * ci13xxx_udc.h - structures, registers, and macros MIPS USB IP core
- *
- * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
- *
- * Author: David Lopo
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Description: MIPS USB IP core family device controller
- * Structures, registers and logging macros
- */
-
-#ifndef _CI13XXX_h_
-#define _CI13XXX_h_
-
-/******************************************************************************
- * DEFINE
- *****************************************************************************/
-#define CI13XXX_PAGE_SIZE 4096ul /* page size for TD's */
-#define ENDPT_MAX 32
-#define CTRL_PAYLOAD_MAX 64
-#define RX 0 /* similar to USB_DIR_OUT but can be used as an index */
-#define TX 1 /* similar to USB_DIR_IN but can be used as an index */
-
-/******************************************************************************
- * STRUCTURES
- *****************************************************************************/
-/* DMA layout of transfer descriptors */
-struct ci13xxx_td {
- /* 0 */
- u32 next;
-#define TD_TERMINATE BIT(0)
-#define TD_ADDR_MASK (0xFFFFFFEUL << 5)
- /* 1 */
- u32 token;
-#define TD_STATUS (0x00FFUL << 0)
-#define TD_STATUS_TR_ERR BIT(3)
-#define TD_STATUS_DT_ERR BIT(5)
-#define TD_STATUS_HALTED BIT(6)
-#define TD_STATUS_ACTIVE BIT(7)
-#define TD_MULTO (0x0003UL << 10)
-#define TD_IOC BIT(15)
-#define TD_TOTAL_BYTES (0x7FFFUL << 16)
- /* 2 */
- u32 page[5];
-#define TD_CURR_OFFSET (0x0FFFUL << 0)
-#define TD_FRAME_NUM (0x07FFUL << 0)
-#define TD_RESERVED_MASK (0x0FFFUL << 0)
-} __attribute__ ((packed));
-
-/* DMA layout of queue heads */
-struct ci13xxx_qh {
- /* 0 */
- u32 cap;
-#define QH_IOS BIT(15)
-#define QH_MAX_PKT (0x07FFUL << 16)
-#define QH_ZLT BIT(29)
-#define QH_MULT (0x0003UL << 30)
- /* 1 */
- u32 curr;
- /* 2 - 8 */
- struct ci13xxx_td td;
- /* 9 */
- u32 RESERVED;
- struct usb_ctrlrequest setup;
-} __attribute__ ((packed));
-
-/* Extension of usb_request */
-struct ci13xxx_req {
- struct usb_request req;
- unsigned map;
- struct list_head queue;
- struct ci13xxx_td *ptr;
- dma_addr_t dma;
- struct ci13xxx_td *zptr;
- dma_addr_t zdma;
-};
-
-/* Extension of usb_ep */
-struct ci13xxx_ep {
- struct usb_ep ep;
- u8 dir;
- u8 num;
- u8 type;
- char name[16];
- struct {
- struct list_head queue;
- struct ci13xxx_qh *ptr;
- dma_addr_t dma;
- } qh;
- int wedge;
-
- /* global resources */
- struct ci13xxx *udc;
- spinlock_t *lock;
- struct device *device;
- struct dma_pool *td_pool;
-};
-
-struct ci13xxx;
-struct ci13xxx_udc_driver {
- const char *name;
- /* offset of the capability registers */
- uintptr_t capoffset;
- unsigned long flags;
-#define CI13XXX_REGS_SHARED BIT(0)
-#define CI13XXX_REQUIRE_TRANSCEIVER BIT(1)
-#define CI13XXX_PULLUP_ON_VBUS BIT(2)
-#define CI13XXX_DISABLE_STREAMING BIT(3)
-
-#define CI13XXX_CONTROLLER_RESET_EVENT 0
-#define CI13XXX_CONTROLLER_STOPPED_EVENT 1
- void (*notify_event) (struct ci13xxx *udc, unsigned event);
-};
-
-struct hw_bank {
- unsigned lpm; /* is LPM? */
- void __iomem *abs; /* bus map offset */
- void __iomem *cap; /* bus map offset + CAP offset */
- void __iomem *op; /* bus map offset + OP offset */
- size_t size; /* bank size */
- void __iomem **regmap;
-};
-
-/* CI13XXX UDC descriptor & global resources */
-struct ci13xxx {
- spinlock_t lock; /* ctrl register bank access */
- void __iomem *regs; /* registers address space */
-
- struct dma_pool *qh_pool; /* DMA pool for queue heads */
- struct dma_pool *td_pool; /* DMA pool for transfer descs */
- struct usb_request *status; /* ep0 status request */
-
- struct device *dev;
- struct usb_gadget gadget; /* USB slave device */
- struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
- u32 ep0_dir; /* ep0 direction */
- struct ci13xxx_ep *ep0out, *ep0in;
- unsigned hw_ep_max; /* number of hw endpoints */
-
- bool setaddr;
- u8 address;
- u8 remote_wakeup; /* Is remote wakeup feature
- enabled by the host? */
- u8 suspended; /* suspended by the host */
- u8 test_mode; /* the selected test mode */
-
- struct hw_bank hw_bank;
- int irq;
- struct usb_gadget_driver *driver; /* 3rd party gadget driver */
- struct ci13xxx_udc_driver *udc_driver; /* device controller driver */
- int vbus_active; /* is VBUS active */
- struct usb_phy *transceiver; /* Transceiver struct */
-};
-
-/******************************************************************************
- * REGISTERS
- *****************************************************************************/
-/* Default offset of capability registers */
-#define DEF_CAPOFFSET 0x100
-
-/* register size */
-#define REG_BITS (32)
-
-/* register indices */
-enum ci13xxx_regs {
- CAP_CAPLENGTH,
- CAP_HCCPARAMS,
- CAP_DCCPARAMS,
- CAP_TESTMODE,
- CAP_LAST = CAP_TESTMODE,
- OP_USBCMD,
- OP_USBSTS,
- OP_USBINTR,
- OP_DEVICEADDR,
- OP_ENDPTLISTADDR,
- OP_PORTSC,
- OP_DEVLC,
- OP_USBMODE,
- OP_ENDPTSETUPSTAT,
- OP_ENDPTPRIME,
- OP_ENDPTFLUSH,
- OP_ENDPTSTAT,
- OP_ENDPTCOMPLETE,
- OP_ENDPTCTRL,
- /* endptctrl1..15 follow */
- OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2,
-};
-
-/* HCCPARAMS */
-#define HCCPARAMS_LEN BIT(17)
-
-/* DCCPARAMS */
-#define DCCPARAMS_DEN (0x1F << 0)
-#define DCCPARAMS_DC BIT(7)
-
-/* TESTMODE */
-#define TESTMODE_FORCE BIT(0)
-
-/* USBCMD */
-#define USBCMD_RS BIT(0)
-#define USBCMD_RST BIT(1)
-#define USBCMD_SUTW BIT(13)
-#define USBCMD_ATDTW BIT(14)
-
-/* USBSTS & USBINTR */
-#define USBi_UI BIT(0)
-#define USBi_UEI BIT(1)
-#define USBi_PCI BIT(2)
-#define USBi_URI BIT(6)
-#define USBi_SLI BIT(8)
-
-/* DEVICEADDR */
-#define DEVICEADDR_USBADRA BIT(24)
-#define DEVICEADDR_USBADR (0x7FUL << 25)
-
-/* PORTSC */
-#define PORTSC_FPR BIT(6)
-#define PORTSC_SUSP BIT(7)
-#define PORTSC_HSP BIT(9)
-#define PORTSC_PTC (0x0FUL << 16)
-
-/* DEVLC */
-#define DEVLC_PSPD (0x03UL << 25)
-#define DEVLC_PSPD_HS (0x02UL << 25)
-
-/* USBMODE */
-#define USBMODE_CM (0x03UL << 0)
-#define USBMODE_CM_IDLE (0x00UL << 0)
-#define USBMODE_CM_DEVICE (0x02UL << 0)
-#define USBMODE_CM_HOST (0x03UL << 0)
-#define USBMODE_SLOM BIT(3)
-#define USBMODE_SDIS BIT(4)
-
-/* ENDPTCTRL */
-#define ENDPTCTRL_RXS BIT(0)
-#define ENDPTCTRL_RXT (0x03UL << 2)
-#define ENDPTCTRL_RXR BIT(6) /* reserved for port 0 */
-#define ENDPTCTRL_RXE BIT(7)
-#define ENDPTCTRL_TXS BIT(16)
-#define ENDPTCTRL_TXT (0x03UL << 18)
-#define ENDPTCTRL_TXR BIT(22) /* reserved for port 0 */
-#define ENDPTCTRL_TXE BIT(23)
-
-#endif /* _CI13XXX_h_ */
--- /dev/null
+/*
+ * core.c - ChipIdea USB IP core family device controller
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Description: ChipIdea USB IP core family device controller
+ *
+ * This driver is composed of several blocks:
+ * - HW: hardware interface
+ * - DBG: debug facilities (optional)
+ * - UTIL: utilities
+ * - ISR: interrupts handling
+ * - ENDPT: endpoint operations (Gadget API)
+ * - GADGET: gadget operations (Gadget API)
+ * - BUS: bus glue code, bus abstraction layer
+ *
+ * Compile Options
+ * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
+ * - STALL_IN: non-empty bulk-in pipes cannot be halted
+ * if defined mass storage compliance succeeds but with warnings
+ * => case 4: Hi > Dn
+ * => case 5: Hi > Di
+ * => case 8: Hi <> Do
+ * if undefined usbtest 13 fails
+ * - TRACE: enable function tracing (depends on DEBUG)
+ *
+ * Main Features
+ * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
+ * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
+ * - Normal & LPM support
+ *
+ * USBTEST Report
+ * - OK: 0-12, 13 (STALL_IN defined) & 14
+ * - Not Supported: 15 & 16 (ISO)
+ *
+ * TODO List
+ * - OTG
+ * - Isochronous & Interrupt Traffic
+ * - Handle requests which spawns into several TDs
+ * - GET_STATUS(device) - always reports 0
+ * - Gadget API (majority of optional features)
+ * - Suspend & Remote Wakeup
+ */
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "udc.h"
+#include "bits.h"
+#include "debug.h"
+
+/* MSM specific */
+#define ABS_AHBBURST (0x0090UL)
+#define ABS_AHBMODE (0x0098UL)
+/* UDC register map */
+static uintptr_t ci_regs_nolpm[] = {
+ [CAP_CAPLENGTH] = 0x000UL,
+ [CAP_HCCPARAMS] = 0x008UL,
+ [CAP_DCCPARAMS] = 0x024UL,
+ [CAP_TESTMODE] = 0x038UL,
+ [OP_USBCMD] = 0x000UL,
+ [OP_USBSTS] = 0x004UL,
+ [OP_USBINTR] = 0x008UL,
+ [OP_DEVICEADDR] = 0x014UL,
+ [OP_ENDPTLISTADDR] = 0x018UL,
+ [OP_PORTSC] = 0x044UL,
+ [OP_DEVLC] = 0x084UL,
+ [OP_USBMODE] = 0x068UL,
+ [OP_ENDPTSETUPSTAT] = 0x06CUL,
+ [OP_ENDPTPRIME] = 0x070UL,
+ [OP_ENDPTFLUSH] = 0x074UL,
+ [OP_ENDPTSTAT] = 0x078UL,
+ [OP_ENDPTCOMPLETE] = 0x07CUL,
+ [OP_ENDPTCTRL] = 0x080UL,
+};
+
+static uintptr_t ci_regs_lpm[] = {
+ [CAP_CAPLENGTH] = 0x000UL,
+ [CAP_HCCPARAMS] = 0x008UL,
+ [CAP_DCCPARAMS] = 0x024UL,
+ [CAP_TESTMODE] = 0x0FCUL,
+ [OP_USBCMD] = 0x000UL,
+ [OP_USBSTS] = 0x004UL,
+ [OP_USBINTR] = 0x008UL,
+ [OP_DEVICEADDR] = 0x014UL,
+ [OP_ENDPTLISTADDR] = 0x018UL,
+ [OP_PORTSC] = 0x044UL,
+ [OP_DEVLC] = 0x084UL,
+ [OP_USBMODE] = 0x0C8UL,
+ [OP_ENDPTSETUPSTAT] = 0x0D8UL,
+ [OP_ENDPTPRIME] = 0x0DCUL,
+ [OP_ENDPTFLUSH] = 0x0E0UL,
+ [OP_ENDPTSTAT] = 0x0E4UL,
+ [OP_ENDPTCOMPLETE] = 0x0E8UL,
+ [OP_ENDPTCTRL] = 0x0ECUL,
+};
+
+static int hw_alloc_regmap(struct ci13xxx *udc, bool is_lpm)
+{
+ int i;
+
+ kfree(udc->hw_bank.regmap);
+
+ udc->hw_bank.regmap = kzalloc((OP_LAST + 1) * sizeof(void *),
+ GFP_KERNEL);
+ if (!udc->hw_bank.regmap)
+ return -ENOMEM;
+
+ for (i = 0; i < OP_ENDPTCTRL; i++)
+ udc->hw_bank.regmap[i] =
+ (i <= CAP_LAST ? udc->hw_bank.cap : udc->hw_bank.op) +
+ (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
+
+ for (; i <= OP_LAST; i++)
+ udc->hw_bank.regmap[i] = udc->hw_bank.op +
+ 4 * (i - OP_ENDPTCTRL) +
+ (is_lpm
+ ? ci_regs_lpm[OP_ENDPTCTRL]
+ : ci_regs_nolpm[OP_ENDPTCTRL]);
+
+ return 0;
+}
+
+/**
+ * hw_port_test_set: writes port test mode (execute without interruption)
+ * @mode: new value
+ *
+ * This function returns an error code
+ */
+int hw_port_test_set(struct ci13xxx *ci, u8 mode)
+{
+ const u8 TEST_MODE_MAX = 7;
+
+ if (mode > TEST_MODE_MAX)
+ return -EINVAL;
+
+ hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
+ return 0;
+}
+
+/**
+ * hw_port_test_get: reads port test mode value
+ *
+ * This function returns port test mode value
+ */
+u8 hw_port_test_get(struct ci13xxx *ci)
+{
+ return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
+}
+
+int hw_device_init(struct ci13xxx *udc, void __iomem *base,
+ uintptr_t cap_offset)
+{
+ u32 reg;
+
+ /* bank is a module variable */
+ udc->hw_bank.abs = base;
+
+ udc->hw_bank.cap = udc->hw_bank.abs;
+ udc->hw_bank.cap += cap_offset;
+ udc->hw_bank.op = udc->hw_bank.cap + ioread8(udc->hw_bank.cap);
+
+ hw_alloc_regmap(udc, false);
+ reg = hw_read(udc, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
+ ffs_nr(HCCPARAMS_LEN);
+ udc->hw_bank.lpm = reg;
+ hw_alloc_regmap(udc, !!reg);
+ udc->hw_bank.size = udc->hw_bank.op - udc->hw_bank.abs;
+ udc->hw_bank.size += OP_LAST;
+ udc->hw_bank.size /= sizeof(u32);
+
+ reg = hw_read(udc, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
+ ffs_nr(DCCPARAMS_DEN);
+ udc->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
+
+ if (udc->hw_ep_max == 0 || udc->hw_ep_max > ENDPT_MAX)
+ return -ENODEV;
+
+ dev_dbg(udc->dev, "ChipIdea UDC found, lpm: %d; cap: %p op: %p\n",
+ udc->hw_bank.lpm, udc->hw_bank.cap, udc->hw_bank.op);
+
+ /* setup lock mode ? */
+
+ /* ENDPTSETUPSTAT is '0' by default */
+
+ /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
+
+ return 0;
+}
+
+/**
+ * hw_device_reset: resets chip (execute without interruption)
+ * @ci: the controller
+ *
+ * This function returns an error code
+ */
+int hw_device_reset(struct ci13xxx *ci)
+{
+ /* should flush & stop before reset */
+ hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
+ hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
+
+ hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST);
+ while (hw_read(ci, OP_USBCMD, USBCMD_RST))
+ udelay(10); /* not RTOS friendly */
+
+
+ if (ci->udc_driver->notify_event)
+ ci->udc_driver->notify_event(ci,
+ CI13XXX_CONTROLLER_RESET_EVENT);
+
+ if (ci->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
+ hw_write(ci, OP_USBMODE, USBMODE_SDIS, USBMODE_SDIS);
+
+ /* USBMODE should be configured step by step */
+ hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
+ hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
+ /* HW >= 2.3 */
+ hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
+
+ if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
+ pr_err("cannot enter in device mode");
+ pr_err("lpm = %i", ci->hw_bank.lpm);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int __devinit ci_udc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ci13xxx_udc_driver *driver = dev->platform_data;
+ struct ci13xxx *udc;
+ struct resource *res;
+ void __iomem *base;
+ int ret;
+
+ if (!driver) {
+ dev_err(dev, "platform data missing\n");
+ return -ENODEV;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "missing resource\n");
+ return -ENODEV;
+ }
+
+ base = devm_request_and_ioremap(dev, res);
+ if (!res) {
+ dev_err(dev, "can't request and ioremap resource\n");
+ return -ENOMEM;
+ }
+
+ ret = udc_probe(driver, dev, base, &udc);
+ if (ret)
+ return ret;
+
+ udc->irq = platform_get_irq(pdev, 0);
+ if (udc->irq < 0) {
+ dev_err(dev, "missing IRQ\n");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ platform_set_drvdata(pdev, udc);
+ ret = request_irq(udc->irq, udc_irq, IRQF_SHARED, driver->name, udc);
+
+out:
+ if (ret)
+ udc_remove(udc);
+
+ return ret;
+}
+
+static int __devexit ci_udc_remove(struct platform_device *pdev)
+{
+ struct ci13xxx *udc = platform_get_drvdata(pdev);
+
+ free_irq(udc->irq, udc);
+ udc_remove(udc);
+
+ return 0;
+}
+
+static struct platform_driver ci_udc_driver = {
+ .probe = ci_udc_probe,
+ .remove = __devexit_p(ci_udc_remove),
+ .driver = {
+ .name = "ci_udc",
+ },
+};
+
+module_platform_driver(ci_udc_driver);
+
+MODULE_ALIAS("platform:ci_udc");
+MODULE_ALIAS("platform:ci13xxx");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
+MODULE_DESCRIPTION("ChipIdea UDC Driver");
--- /dev/null
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "udc.h"
+#include "bits.h"
+#include "debug.h"
+
+/* Interrupt statistics */
+#define ISR_MASK 0x1F
+static struct isr_statistics {
+ u32 test;
+ u32 ui;
+ u32 uei;
+ u32 pci;
+ u32 uri;
+ u32 sli;
+ u32 none;
+ struct {
+ u32 cnt;
+ u32 buf[ISR_MASK+1];
+ u32 idx;
+ } hndl;
+} isr_statistics;
+
+void dbg_interrupt(u32 intmask)
+{
+ if (!intmask) {
+ isr_statistics.none++;
+ return;
+ }
+
+ isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intmask;
+ isr_statistics.hndl.idx &= ISR_MASK;
+ isr_statistics.hndl.cnt++;
+
+ if (USBi_URI & intmask)
+ isr_statistics.uri++;
+ if (USBi_PCI & intmask)
+ isr_statistics.pci++;
+ if (USBi_UEI & intmask)
+ isr_statistics.uei++;
+ if (USBi_UI & intmask)
+ isr_statistics.ui++;
+ if (USBi_SLI & intmask)
+ isr_statistics.sli++;
+}
+
+/**
+ * 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(struct ci13xxx *udc, u32 *buf, size_t size)
+{
+ unsigned i;
+
+ if (size > udc->hw_bank.size)
+ size = udc->hw_bank.size;
+
+ for (i = 0; i < size; i++)
+ buf[i] = hw_read(udc, 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(struct ci13xxx *udc, u16 addr, u32 data)
+{
+ /* align */
+ addr /= sizeof(u32);
+
+ if (addr >= udc->hw_bank.size)
+ return -EINVAL;
+
+ /* align */
+ addr *= sizeof(u32);
+
+ hw_write(udc, addr, ~0, data);
+ return 0;
+}
+
+/**
+ * hw_intr_clear: disables interrupt & clears interrupt status (execute without
+ * interruption)
+ * @n: interrupt bit
+ *
+ * This function returns an error code
+ */
+static int hw_intr_clear(struct ci13xxx *udc, int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_write(udc, OP_USBINTR, BIT(n), 0);
+ hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
+ return 0;
+}
+
+/**
+ * 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(struct ci13xxx *udc, int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
+ hw_write(udc, OP_USBINTR, BIT(n), BIT(n));
+ hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
+ hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, 0);
+ return 0;
+}
+
+/**
+ * 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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->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, "max_speed = %d\n",
+ gadget->max_speed);
+ /* TODO: Scheduled for removal in 3.8. */
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
+ gadget_is_dualspeed(gadget));
+ 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;
+
+ 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->max_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? %02X %-7.7s %4i ?\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? %02X %-7.7s %4i ?\t%s\n",
+ stamp, addr, name, status, extra);
+}
+
+/**
+ * dbg_done: prints a DONE event
+ * @addr: endpoint address
+ * @td: transfer descriptor
+ * @status: status
+ */
+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
+ */
+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
+ */
+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
+ */
+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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev->parent, "[%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;
+
+ 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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->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(udc));
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "enable = %08x\n", hw_read_intr_enable(udc));*/
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
+ isr_statistics.test);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? ui = %d\n",
+ isr_statistics.ui);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? uei = %d\n",
+ isr_statistics.uei);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? pci = %d\n",
+ isr_statistics.pci);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? uri = %d\n",
+ isr_statistics.uri);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? 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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "EINVAL\n");
+ goto done;
+ }
+
+ if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
+ dev_err(udc->dev, "<1|0> <bit>: enable|disable interrupt\n");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (en) {
+ if (hw_intr_force(udc, bit))
+ dev_err(dev, "invalid bit number\n");
+ else
+ isr_statistics.test++;
+ } else {
+ if (hw_intr_clear(udc, 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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "EINVAL\n");
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ mode = hw_port_test_get(udc);
+ 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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u", &mode) != 1) {
+ dev_err(udc->dev, "<mode>: set port test mode");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (hw_port_test_set(udc, mode))
+ dev_err(udc->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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ for (i = 0; i < udc->hw_ep_max/2; i++) {
+ struct ci13xxx_ep *mEpRx = &udc->ci13xxx_ep[i];
+ struct ci13xxx_ep *mEpTx =
+ &udc->ci13xxx_ep[i + udc->hw_ep_max/2];
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: RX=%08X TX=%08X\n",
+ i, (u32)mEpRx->qh.dma, (u32)mEpTx->qh.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 *)mEpRx->qh.ptr + j),
+ *((u32 *)mEpTx->qh.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
+ */
+#define DUMP_ENTRIES 512
+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;
+ unsigned i, k, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL);
+ if (!dump) {
+ dev_err(udc->dev, "%s: out of memory\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ k = hw_register_read(udc, dump, DUMP_ENTRIES);
+ 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]);
+ }
+ kfree(dump);
+
+ 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;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%li %li", &addr, &data) != 2) {
+ dev_err(udc->dev,
+ "<addr> <data>: write data to register address\n");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (hw_register_write(udc, addr, data))
+ dev_err(udc->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, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ for (i = 0; i < udc->hw_ep_max; i++)
+ list_for_each(ptr, &udc->ci13xxx_ep[i].qh.queue)
+ {
+ req = list_entry(ptr, struct ci13xxx_req, queue);
+
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: TD=%08X %s\n",
+ i % udc->hw_ep_max/2, (u32)req->dma,
+ ((i < udc->hw_ep_max/2) ? "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
+ */
+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
+ */
+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;
+}
--- /dev/null
+/*
+ * debug.h - ChipIdea USB driver debug interfaces
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_DEBUG_H
+#define __DRIVERS_USB_CHIPIDEA_DEBUG_H
+
+#ifdef CONFIG_USB_CHIPIDEA_DEBUG
+void dbg_interrupt(u32 intmask);
+void dbg_done(u8 addr, const u32 token, int status);
+void dbg_event(u8 addr, const char *name, int status);
+void dbg_queue(u8 addr, const struct usb_request *req, int status);
+void dbg_setup(u8 addr, const struct usb_ctrlrequest *req);
+int dbg_create_files(struct device *dev);
+int dbg_remove_files(struct device *dev);
+#else
+static inline void dbg_interrupt(u32 intmask)
+{
+}
+
+static inline void dbg_done(u8 addr, const u32 token, int status)
+{
+}
+
+static inline void dbg_event(u8 addr, const char *name, int status)
+{
+}
+
+static inline void dbg_queue(u8 addr, const struct usb_request *req, int status)
+{
+}
+
+static inline void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
+{
+}
+
+static inline int dbg_create_files(struct device *dev)
+{
+ return 0;
+}
+
+static inline int dbg_remove_files(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+#endif /* __DRIVERS_USB_CHIPIDEA_DEBUG_H */
/*
- * ci13xxx_udc.c - MIPS USB IP core family device controller
+ * udc.h - ChipIdea UDC driver
*
* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
*
* published by the Free Software Foundation.
*/
-/*
- * Description: MIPS USB IP core family device controller
- * Currently it only supports IP part number CI13412
- *
- * This driver is composed of several blocks:
- * - HW: hardware interface
- * - DBG: debug facilities (optional)
- * - UTIL: utilities
- * - ISR: interrupts handling
- * - ENDPT: endpoint operations (Gadget API)
- * - GADGET: gadget operations (Gadget API)
- * - BUS: bus glue code, bus abstraction layer
- *
- * Compile Options
- * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
- * - STALL_IN: non-empty bulk-in pipes cannot be halted
- * if defined mass storage compliance succeeds but with warnings
- * => case 4: Hi > Dn
- * => case 5: Hi > Di
- * => case 8: Hi <> Do
- * if undefined usbtest 13 fails
- * - TRACE: enable function tracing (depends on DEBUG)
- *
- * Main Features
- * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
- * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
- * - Normal & LPM support
- *
- * USBTEST Report
- * - OK: 0-12, 13 (STALL_IN defined) & 14
- * - Not Supported: 15 & 16 (ISO)
- *
- * TODO List
- * - OTG
- * - Isochronous & Interrupt Traffic
- * - Handle requests which spawns into several TDs
- * - GET_STATUS(device) - always reports 0
- * - Gadget API (majority of optional features)
- * - Suspend & Remote Wakeup
- */
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
-#include "ci13xxx_udc.h"
-
-/******************************************************************************
- * DEFINE
- *****************************************************************************/
-
-#define DMA_ADDR_INVALID (~(dma_addr_t)0)
+#include "ci.h"
+#include "udc.h"
+#include "bits.h"
+#include "debug.h"
/* control endpoint description */
static const struct usb_endpoint_descriptor
.wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
};
-/* Interrupt statistics */
-#define ISR_MASK 0x1F
-static struct {
- u32 test;
- u32 ui;
- u32 uei;
- u32 pci;
- u32 uri;
- u32 sli;
- u32 none;
- struct {
- u32 cnt;
- u32 buf[ISR_MASK+1];
- u32 idx;
- } hndl;
-} isr_statistics;
-
-/**
- * ffs_nr: find first (least significant) bit set
- * @x: the word to search
- *
- * This function returns bit number (instead of position)
- */
-static int ffs_nr(u32 x)
-{
- int n = ffs(x);
-
- return n ? n-1 : 32;
-}
-
-/******************************************************************************
- * HW block
- *****************************************************************************/
-
-/* MSM specific */
-#define ABS_AHBBURST (0x0090UL)
-#define ABS_AHBMODE (0x0098UL)
-/* UDC register map */
-static uintptr_t ci_regs_nolpm[] = {
- [CAP_CAPLENGTH] = 0x000UL,
- [CAP_HCCPARAMS] = 0x008UL,
- [CAP_DCCPARAMS] = 0x024UL,
- [CAP_TESTMODE] = 0x038UL,
- [OP_USBCMD] = 0x000UL,
- [OP_USBSTS] = 0x004UL,
- [OP_USBINTR] = 0x008UL,
- [OP_DEVICEADDR] = 0x014UL,
- [OP_ENDPTLISTADDR] = 0x018UL,
- [OP_PORTSC] = 0x044UL,
- [OP_DEVLC] = 0x084UL,
- [OP_USBMODE] = 0x068UL,
- [OP_ENDPTSETUPSTAT] = 0x06CUL,
- [OP_ENDPTPRIME] = 0x070UL,
- [OP_ENDPTFLUSH] = 0x074UL,
- [OP_ENDPTSTAT] = 0x078UL,
- [OP_ENDPTCOMPLETE] = 0x07CUL,
- [OP_ENDPTCTRL] = 0x080UL,
-};
-
-static uintptr_t ci_regs_lpm[] = {
- [CAP_CAPLENGTH] = 0x000UL,
- [CAP_HCCPARAMS] = 0x008UL,
- [CAP_DCCPARAMS] = 0x024UL,
- [CAP_TESTMODE] = 0x0FCUL,
- [OP_USBCMD] = 0x000UL,
- [OP_USBSTS] = 0x004UL,
- [OP_USBINTR] = 0x008UL,
- [OP_DEVICEADDR] = 0x014UL,
- [OP_ENDPTLISTADDR] = 0x018UL,
- [OP_PORTSC] = 0x044UL,
- [OP_DEVLC] = 0x084UL,
- [OP_USBMODE] = 0x0C8UL,
- [OP_ENDPTSETUPSTAT] = 0x0D8UL,
- [OP_ENDPTPRIME] = 0x0DCUL,
- [OP_ENDPTFLUSH] = 0x0E0UL,
- [OP_ENDPTSTAT] = 0x0E4UL,
- [OP_ENDPTCOMPLETE] = 0x0E8UL,
- [OP_ENDPTCTRL] = 0x0ECUL,
-};
-
-static int hw_alloc_regmap(struct ci13xxx *udc, bool is_lpm)
-{
- int i;
-
- kfree(udc->hw_bank.regmap);
-
- udc->hw_bank.regmap = kzalloc((OP_LAST + 1) * sizeof(void *),
- GFP_KERNEL);
- if (!udc->hw_bank.regmap)
- return -ENOMEM;
-
- for (i = 0; i < OP_ENDPTCTRL; i++)
- udc->hw_bank.regmap[i] =
- (i <= CAP_LAST ? udc->hw_bank.cap : udc->hw_bank.op) +
- (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
-
- for (; i <= OP_LAST; i++)
- udc->hw_bank.regmap[i] = udc->hw_bank.op +
- 4 * (i - OP_ENDPTCTRL) +
- (is_lpm
- ? ci_regs_lpm[OP_ENDPTCTRL]
- : ci_regs_nolpm[OP_ENDPTCTRL]);
-
- return 0;
-}
-
/**
* hw_ep_bit: calculates the bit number
* @num: endpoint number
return num + (dir ? 16 : 0);
}
-static int ep_to_bit(struct ci13xxx *udc, int n)
+static inline int ep_to_bit(struct ci13xxx *udc, int n)
{
int fill = 16 - udc->hw_ep_max / 2;
}
/**
- * hw_read: reads from a hw register
- * @reg: register index
- * @mask: bitfield mask
- *
- * This function returns register contents
- */
-static u32 hw_read(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask)
-{
- return ioread32(udc->hw_bank.regmap[reg]) & mask;
-}
-
-/**
- * hw_write: writes to a hw register
- * @reg: register index
- * @mask: bitfield mask
- * @data: new value
- */
-static void hw_write(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask,
- u32 data)
-{
- if (~mask)
- data = (ioread32(udc->hw_bank.regmap[reg]) & ~mask)
- | (data & mask);
-
- iowrite32(data, udc->hw_bank.regmap[reg]);
-}
-
-/**
- * hw_test_and_clear: tests & clears a hw register
- * @reg: register index
- * @mask: bitfield mask
- *
- * This function returns register contents
- */
-static u32 hw_test_and_clear(struct ci13xxx *udc, enum ci13xxx_regs reg,
- u32 mask)
-{
- u32 val = ioread32(udc->hw_bank.regmap[reg]) & mask;
-
- iowrite32(val, udc->hw_bank.regmap[reg]);
- return val;
-}
-
-/**
- * hw_test_and_write: tests & writes a hw register
- * @reg: register index
- * @mask: bitfield mask
- * @data: new value
- *
- * This function returns register contents
- */
-static u32 hw_test_and_write(struct ci13xxx *udc, enum ci13xxx_regs reg,
- u32 mask, u32 data)
-{
- u32 val = hw_read(udc, reg, ~0);
-
- hw_write(udc, reg, mask, data);
- return (val & mask) >> ffs_nr(mask);
-}
-
-static int hw_device_init(struct ci13xxx *udc, void __iomem *base,
- uintptr_t cap_offset)
-{
- u32 reg;
-
- /* bank is a module variable */
- udc->hw_bank.abs = base;
-
- udc->hw_bank.cap = udc->hw_bank.abs;
- udc->hw_bank.cap += cap_offset;
- udc->hw_bank.op = udc->hw_bank.cap + ioread8(udc->hw_bank.cap);
-
- hw_alloc_regmap(udc, false);
- reg = hw_read(udc, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
- ffs_nr(HCCPARAMS_LEN);
- udc->hw_bank.lpm = reg;
- hw_alloc_regmap(udc, !!reg);
- udc->hw_bank.size = udc->hw_bank.op - udc->hw_bank.abs;
- udc->hw_bank.size += OP_LAST;
- udc->hw_bank.size /= sizeof(u32);
-
- reg = hw_read(udc, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
- ffs_nr(DCCPARAMS_DEN);
- udc->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
-
- if (udc->hw_ep_max == 0 || udc->hw_ep_max > ENDPT_MAX)
- return -ENODEV;
-
- dev_dbg(udc->dev, "ChipIdea UDC found, lpm: %d; cap: %p op: %p\n",
- udc->hw_bank.lpm, udc->hw_bank.cap, udc->hw_bank.op);
-
- /* setup lock mode ? */
-
- /* ENDPTSETUPSTAT is '0' by default */
-
- /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
-
- return 0;
-}
-/**
- * hw_device_reset: resets chip (execute without interruption)
- * @base: register base address
- *
- * This function returns an error code
- */
-static int hw_device_reset(struct ci13xxx *udc)
-{
- /* should flush & stop before reset */
- hw_write(udc, OP_ENDPTFLUSH, ~0, ~0);
- hw_write(udc, OP_USBCMD, USBCMD_RS, 0);
-
- hw_write(udc, OP_USBCMD, USBCMD_RST, USBCMD_RST);
- while (hw_read(udc, OP_USBCMD, USBCMD_RST))
- udelay(10); /* not RTOS friendly */
-
-
- if (udc->udc_driver->notify_event)
- udc->udc_driver->notify_event(udc,
- CI13XXX_CONTROLLER_RESET_EVENT);
-
- if (udc->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
- hw_write(udc, OP_USBMODE, USBMODE_SDIS, USBMODE_SDIS);
-
- /* USBMODE should be configured step by step */
- hw_write(udc, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
- hw_write(udc, OP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
- /* HW >= 2.3 */
- hw_write(udc, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
-
- if (hw_read(udc, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
- pr_err("cannot enter in device mode");
- pr_err("lpm = %i", udc->hw_bank.lpm);
- return -ENODEV;
- }
-
- return 0;
-}
-
-/**
* hw_device_state: enables/disables interrupts & starts/stops device (execute
* without interruption)
* @dma: 0 => disable, !0 => enable and set dma engine
}
/**
- * hw_intr_clear: disables interrupt & clears interrupt status (execute without
- * interruption)
- * @n: interrupt bit
- *
- * This function returns an error code
- */
-static int hw_intr_clear(struct ci13xxx *udc, int n)
-{
- if (n >= REG_BITS)
- return -EINVAL;
-
- hw_write(udc, OP_USBINTR, BIT(n), 0);
- hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
- return 0;
-}
-
-/**
- * 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(struct ci13xxx *udc, int n)
-{
- if (n >= REG_BITS)
- return -EINVAL;
-
- hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
- hw_write(udc, OP_USBINTR, BIT(n), BIT(n));
- hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
- hw_write(udc, CAP_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
}
/**
- * hw_port_test_get: reads port test mode value
- *
- * This function returns port test mode value
- */
-static u8 hw_port_test_get(struct ci13xxx *udc)
-{
- return hw_read(udc, OP_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(struct ci13xxx *udc, u8 mode)
-{
- const u8 TEST_MODE_MAX = 7;
-
- if (mode > TEST_MODE_MAX)
- return -EINVAL;
-
- hw_write(udc, OP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
- return 0;
-}
-
-/**
* hw_read_intr_enable: returns interrupt enable register
*
* This function returns register data
}
/**
- * 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(struct ci13xxx *udc, u32 *buf, size_t size)
-{
- unsigned i;
-
- if (size > udc->hw_bank.size)
- size = udc->hw_bank.size;
-
- for (i = 0; i < size; i++)
- buf[i] = hw_read(udc, 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(struct ci13xxx *udc, u16 addr, u32 data)
-{
- /* align */
- addr /= sizeof(u32);
-
- if (addr >= udc->hw_bank.size)
- return -EINVAL;
-
- /* align */
- addr *= sizeof(u32);
-
- hw_write(udc, addr, ~0, data);
- return 0;
-}
-
-/**
* hw_test_and_clear_complete: test & clear complete status (execute without
* interruption)
* @n: endpoint number
}
/******************************************************************************
- * 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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->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, "max_speed = %d\n",
- gadget->max_speed);
- /* TODO: Scheduled for removal in 3.8. */
- n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
- gadget_is_dualspeed(gadget));
- 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;
-
- 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->max_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? %02X %-7.7s %4i ?\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? %02X %-7.7s %4i ?\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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(dev->parent, "[%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;
-
- 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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->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(udc));
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "enable = %08x\n", hw_read_intr_enable(udc));
-
- n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
- isr_statistics.test);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? ui = %d\n",
- isr_statistics.ui);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? uei = %d\n",
- isr_statistics.uei);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? pci = %d\n",
- isr_statistics.pci);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? uri = %d\n",
- isr_statistics.uri);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? 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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "EINVAL\n");
- goto done;
- }
-
- if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
- dev_err(udc->dev, "<1|0> <bit>: enable|disable interrupt\n");
- goto done;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- if (en) {
- if (hw_intr_force(udc, bit))
- dev_err(dev, "invalid bit number\n");
- else
- isr_statistics.test++;
- } else {
- if (hw_intr_clear(udc, 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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "EINVAL\n");
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- mode = hw_port_test_get(udc);
- 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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- goto done;
- }
-
- if (sscanf(buf, "%u", &mode) != 1) {
- dev_err(udc->dev, "<mode>: set port test mode");
- goto done;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- if (hw_port_test_set(udc, mode))
- dev_err(udc->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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- for (i = 0; i < udc->hw_ep_max/2; i++) {
- struct ci13xxx_ep *mEpRx = &udc->ci13xxx_ep[i];
- struct ci13xxx_ep *mEpTx =
- &udc->ci13xxx_ep[i + udc->hw_ep_max/2];
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "EP=%02i: RX=%08X TX=%08X\n",
- i, (u32)mEpRx->qh.dma, (u32)mEpTx->qh.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 *)mEpRx->qh.ptr + j),
- *((u32 *)mEpTx->qh.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
- */
-#define DUMP_ENTRIES 512
-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;
- unsigned i, k, n = 0;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL);
- if (!dump) {
- dev_err(udc->dev, "%s: out of memory\n", __func__);
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- k = hw_register_read(udc, dump, DUMP_ENTRIES);
- 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]);
- }
- kfree(dump);
-
- 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;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- goto done;
- }
-
- if (sscanf(buf, "%li %li", &addr, &data) != 2) {
- dev_err(udc->dev,
- "<addr> <data>: write data to register address\n");
- goto done;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- if (hw_register_write(udc, addr, data))
- dev_err(udc->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, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- for (i = 0; i < udc->hw_ep_max; i++)
- list_for_each(ptr, &udc->ci13xxx_ep[i].qh.queue)
- {
- req = list_entry(ptr, struct ci13xxx_req, queue);
-
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "EP=%02i: TD=%08X %s\n",
- i % udc->hw_ep_max/2, (u32)req->dma,
- ((i < udc->hw_ep_max/2) ? "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
*****************************************************************************/
/**
* This function returns IRQ_HANDLED if the IRQ has been handled
* It locks access to registers
*/
-static irqreturn_t udc_irq(int irq, void *data)
+irqreturn_t udc_irq(int irq, void *data)
{
struct ci13xxx *udc = data;
irqreturn_t retval;
}
}
intr = hw_test_and_clear_intr_active(udc);
- if (intr) {
- isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr;
- isr_statistics.hndl.idx &= ISR_MASK;
- isr_statistics.hndl.cnt++;
+ dbg_interrupt(intr);
+ if (intr) {
/* order defines priority - do NOT change it */
- if (USBi_URI & intr) {
- isr_statistics.uri++;
+ if (USBi_URI & intr)
isr_reset_handler(udc);
- }
+
if (USBi_PCI & intr) {
- isr_statistics.pci++;
udc->gadget.speed = hw_port_is_high_speed(udc) ?
USB_SPEED_HIGH : USB_SPEED_FULL;
if (udc->suspended && udc->driver->resume) {
udc->suspended = 0;
}
}
- if (USBi_UEI & intr)
- isr_statistics.uei++;
- if (USBi_UI & intr) {
- isr_statistics.ui++;
+
+ if (USBi_UI & intr)
isr_tr_complete_handler(udc);
- }
+
if (USBi_SLI & intr) {
if (udc->gadget.speed != USB_SPEED_UNKNOWN &&
udc->driver->suspend) {
udc->driver->suspend(&udc->gadget);
spin_lock(&udc->lock);
}
- isr_statistics.sli++;
}
retval = IRQ_HANDLED;
} else {
- isr_statistics.none++;
retval = IRQ_NONE;
}
spin_unlock(&udc->lock);
* 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 ci13xxx_udc_driver *driver, struct device *dev,
- void __iomem *regs, struct ci13xxx **_udc)
+int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
+ void __iomem *regs, struct ci13xxx **_udc)
{
struct ci13xxx *udc;
int retval = 0;
goto put_transceiver;
}
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
retval = dbg_create_files(&udc->gadget.dev);
-#endif
if (retval)
goto unreg_device;
dev_err(dev, "error = %i\n", retval);
remove_dbg:
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
dbg_remove_files(&udc->gadget.dev);
-#endif
unreg_device:
device_unregister(&udc->gadget.dev);
put_transceiver:
*
* No interrupts active, the IRQ has been released
*/
-static void udc_remove(struct ci13xxx *udc)
+void udc_remove(struct ci13xxx *udc)
{
int i;
otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
usb_put_transceiver(udc->transceiver);
}
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
dbg_remove_files(&udc->gadget.dev);
-#endif
device_unregister(&udc->gadget.dev);
kfree(udc->hw_bank.regmap);
kfree(udc);
}
-
-static int __devinit ci_udc_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct ci13xxx_udc_driver *driver = dev->platform_data;
- struct ci13xxx *udc;
- struct resource *res;
- void __iomem *base;
- int ret;
-
- if (!driver) {
- dev_err(dev, "platform data missing\n");
- return -ENODEV;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(dev, "missing resource\n");
- return -ENODEV;
- }
-
- base = devm_request_and_ioremap(dev, res);
- if (!res) {
- dev_err(dev, "can't request and ioremap resource\n");
- return -ENOMEM;
- }
-
- ret = udc_probe(driver, dev, base, &udc);
- if (ret)
- return ret;
-
- udc->irq = platform_get_irq(pdev, 0);
- if (udc->irq < 0) {
- dev_err(dev, "missing IRQ\n");
- ret = -ENODEV;
- goto out;
- }
-
- platform_set_drvdata(pdev, udc);
- ret = request_irq(udc->irq, udc_irq, IRQF_SHARED, driver->name, udc);
-
-out:
- if (ret)
- udc_remove(udc);
-
- return ret;
-}
-
-static int __devexit ci_udc_remove(struct platform_device *pdev)
-{
- struct ci13xxx *udc = platform_get_drvdata(pdev);
-
- free_irq(udc->irq, udc);
- udc_remove(udc);
-
- return 0;
-}
-
-static struct platform_driver ci_udc_driver = {
- .probe = ci_udc_probe,
- .remove = __devexit_p(ci_udc_remove),
- .driver = {
- .name = "ci_udc",
- },
-};
-
-module_platform_driver(ci_udc_driver);
-
-MODULE_ALIAS("platform:ci_udc");
-MODULE_ALIAS("platform:ci13xxx");
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
-MODULE_DESCRIPTION("ChipIdea UDC Driver");
--- /dev/null
+/*
+ * udc.h - ChipIdea UDC structures
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_UDC_H
+#define __DRIVERS_USB_CHIPIDEA_UDC_H
+
+#include <linux/list.h>
+
+#define CTRL_PAYLOAD_MAX 64
+#define RX 0 /* similar to USB_DIR_OUT but can be used as an index */
+#define TX 1 /* similar to USB_DIR_IN but can be used as an index */
+
+/* DMA layout of transfer descriptors */
+struct ci13xxx_td {
+ /* 0 */
+ u32 next;
+#define TD_TERMINATE BIT(0)
+#define TD_ADDR_MASK (0xFFFFFFEUL << 5)
+ /* 1 */
+ u32 token;
+#define TD_STATUS (0x00FFUL << 0)
+#define TD_STATUS_TR_ERR BIT(3)
+#define TD_STATUS_DT_ERR BIT(5)
+#define TD_STATUS_HALTED BIT(6)
+#define TD_STATUS_ACTIVE BIT(7)
+#define TD_MULTO (0x0003UL << 10)
+#define TD_IOC BIT(15)
+#define TD_TOTAL_BYTES (0x7FFFUL << 16)
+ /* 2 */
+ u32 page[5];
+#define TD_CURR_OFFSET (0x0FFFUL << 0)
+#define TD_FRAME_NUM (0x07FFUL << 0)
+#define TD_RESERVED_MASK (0x0FFFUL << 0)
+} __attribute__ ((packed));
+
+/* DMA layout of queue heads */
+struct ci13xxx_qh {
+ /* 0 */
+ u32 cap;
+#define QH_IOS BIT(15)
+#define QH_MAX_PKT (0x07FFUL << 16)
+#define QH_ZLT BIT(29)
+#define QH_MULT (0x0003UL << 30)
+ /* 1 */
+ u32 curr;
+ /* 2 - 8 */
+ struct ci13xxx_td td;
+ /* 9 */
+ u32 RESERVED;
+ struct usb_ctrlrequest setup;
+} __attribute__ ((packed));
+
+/* Extension of usb_request */
+struct ci13xxx_req {
+ struct usb_request req;
+ unsigned map;
+ struct list_head queue;
+ struct ci13xxx_td *ptr;
+ dma_addr_t dma;
+ struct ci13xxx_td *zptr;
+ dma_addr_t zdma;
+};
+
+#ifdef CONFIG_USB_CHIPIDEA_UDC
+irqreturn_t udc_irq(int irq, void *data);
+int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
+ void __iomem *regs, struct ci13xxx **_udc);
+void udc_remove(struct ci13xxx *udc);
+#else
+static inline irqreturn_t udc_irq(int irq, void *data)
+{
+ return IRQ_NONE;
+}
+
+static inline
+int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
+ void __iomem *regs, struct ci13xxx **_udc)
+{
+ return -ENODEV;
+}
+
+static inline void udc_remove(struct ci13xxx *udc)
+{
+}
+#endif
+
+#endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */
--- /dev/null
+/*
+ * Platform data for the chipidea USB dual role controller
+ */
+
+#ifndef __LINUX_USB_CHIPIDEA_H
+#define __LINUX_USB_CHIPIDEA_H
+
+struct ci13xxx;
+struct ci13xxx_udc_driver {
+ const char *name;
+ /* offset of the capability registers */
+ uintptr_t capoffset;
+ unsigned long flags;
+#define CI13XXX_REGS_SHARED BIT(0)
+#define CI13XXX_REQUIRE_TRANSCEIVER BIT(1)
+#define CI13XXX_PULLUP_ON_VBUS BIT(2)
+#define CI13XXX_DISABLE_STREAMING BIT(3)
+
+#define CI13XXX_CONTROLLER_RESET_EVENT 0
+#define CI13XXX_CONTROLLER_STOPPED_EVENT 1
+ void (*notify_event) (struct ci13xxx *udc, unsigned event);
+};
+
+/* Default offset of capability registers */
+#define DEF_CAPOFFSET 0x100
+
+#endif
projects / platform / kernel / linux-rpi.git / commitdiff