diff options
Diffstat (limited to 'drivers/usb/gadget/ci13xxx_udc.c')
| -rw-r--r-- | drivers/usb/gadget/ci13xxx_udc.c | 2830 |
1 files changed, 0 insertions, 2830 deletions
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c deleted file mode 100644 index bebf911c7e5..00000000000 --- a/drivers/usb/gadget/ci13xxx_udc.c +++ /dev/null @@ -1,2830 +0,0 @@ -/* - * ci13xxx_udc.c - MIPS 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: 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 - * - PCI: PCI core interface and PCI resources (interrupts, memory...) - * - * 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/device.h> -#include <linux/dmapool.h> -#include <linux/dma-mapping.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/usb/ch9.h> -#include <linux/usb/gadget.h> - -#include "ci13xxx_udc.h" - - -/****************************************************************************** - * DEFINE - *****************************************************************************/ -/* ctrl register bank access */ -static DEFINE_SPINLOCK(udc_lock); - -/* driver name */ -#define UDC_DRIVER_NAME "ci13xxx_udc" - -/* control endpoint description */ -static const struct usb_endpoint_descriptor -ctrl_endpt_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - - .bmAttributes = USB_ENDPOINT_XFER_CONTROL, - .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX), -}; - -/* UDC descriptor */ -static struct ci13xxx *_udc; - -/* 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 - *****************************************************************************/ -/* register bank descriptor */ -static struct { - unsigned lpm; /* is LPM? */ - void __iomem *abs; /* bus map offset */ - void __iomem *cap; /* bus map offset + CAP offset + CAP data */ - size_t size; /* bank size */ -} hw_bank; - -/* UDC register map */ -#define ABS_CAPLENGTH (0x100UL) -#define ABS_HCCPARAMS (0x108UL) -#define ABS_DCCPARAMS (0x124UL) -#define ABS_TESTMODE (hw_bank.lpm ? 0x0FCUL : 0x138UL) -/* offset to CAPLENTGH (addr + data) */ -#define CAP_USBCMD (0x000UL) -#define CAP_USBSTS (0x004UL) -#define CAP_USBINTR (0x008UL) -#define CAP_DEVICEADDR (0x014UL) -#define CAP_ENDPTLISTADDR (0x018UL) -#define CAP_PORTSC (0x044UL) -#define CAP_DEVLC (0x0B4UL) -#define CAP_USBMODE (hw_bank.lpm ? 0x0C8UL : 0x068UL) -#define CAP_ENDPTSETUPSTAT (hw_bank.lpm ? 0x0D8UL : 0x06CUL) -#define CAP_ENDPTPRIME (hw_bank.lpm ? 0x0DCUL : 0x070UL) -#define CAP_ENDPTFLUSH (hw_bank.lpm ? 0x0E0UL : 0x074UL) -#define CAP_ENDPTSTAT (hw_bank.lpm ? 0x0E4UL : 0x078UL) -#define CAP_ENDPTCOMPLETE (hw_bank.lpm ? 0x0E8UL : 0x07CUL) -#define CAP_ENDPTCTRL (hw_bank.lpm ? 0x0ECUL : 0x080UL) -#define CAP_LAST (hw_bank.lpm ? 0x12CUL : 0x0C0UL) - -/* maximum number of enpoints: valid only after hw_device_reset() */ -static unsigned hw_ep_max; - -/** - * hw_ep_bit: calculates the bit number - * @num: endpoint number - * @dir: endpoint direction - * - * This function returns bit number - */ -static inline int hw_ep_bit(int num, int dir) -{ - return num + (dir ? 16 : 0); -} - -/** - * hw_aread: reads from register bitfield - * @addr: address relative to bus map - * @mask: bitfield mask - * - * This function returns register bitfield data - */ -static u32 hw_aread(u32 addr, u32 mask) -{ - return ioread32(addr + hw_bank.abs) & mask; -} - -/** - * hw_awrite: writes to register bitfield - * @addr: address relative to bus map - * @mask: bitfield mask - * @data: new data - */ -static void hw_awrite(u32 addr, u32 mask, u32 data) -{ - iowrite32(hw_aread(addr, ~mask) | (data & mask), - addr + hw_bank.abs); -} - -/** - * hw_cread: reads from register bitfield - * @addr: address relative to CAP offset plus content - * @mask: bitfield mask - * - * This function returns register bitfield data - */ -static u32 hw_cread(u32 addr, u32 mask) -{ - return ioread32(addr + hw_bank.cap) & mask; -} - -/** - * hw_cwrite: writes to register bitfield - * @addr: address relative to CAP offset plus content - * @mask: bitfield mask - * @data: new data - */ -static void hw_cwrite(u32 addr, u32 mask, u32 data) -{ - iowrite32(hw_cread(addr, ~mask) | (data & mask), - addr + hw_bank.cap); -} - -/** - * hw_ctest_and_clear: tests & clears register bitfield - * @addr: address relative to CAP offset plus content - * @mask: bitfield mask - * - * This function returns register bitfield data - */ -static u32 hw_ctest_and_clear(u32 addr, u32 mask) -{ - u32 reg = hw_cread(addr, mask); - - iowrite32(reg, addr + hw_bank.cap); - return reg; -} - -/** - * hw_ctest_and_write: tests & writes register bitfield - * @addr: address relative to CAP offset plus content - * @mask: bitfield mask - * @data: new data - * - * This function returns register bitfield data - */ -static u32 hw_ctest_and_write(u32 addr, u32 mask, u32 data) -{ - u32 reg = hw_cread(addr, ~0); - - iowrite32((reg & ~mask) | (data & mask), addr + hw_bank.cap); - return (reg & mask) >> ffs_nr(mask); -} - -/** - * hw_device_reset: resets chip (execute without interruption) - * @base: register base address - * - * This function returns an error code - */ -static int hw_device_reset(void __iomem *base) -{ - u32 reg; - - /* bank is a module variable */ - hw_bank.abs = base; - - hw_bank.cap = hw_bank.abs; - hw_bank.cap += ABS_CAPLENGTH; - hw_bank.cap += ioread8(hw_bank.cap); - - reg = hw_aread(ABS_HCCPARAMS, HCCPARAMS_LEN) >> ffs_nr(HCCPARAMS_LEN); - hw_bank.lpm = reg; - hw_bank.size = hw_bank.cap - hw_bank.abs; - hw_bank.size += CAP_LAST; - hw_bank.size /= sizeof(u32); - - /* should flush & stop before reset */ - hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0); - hw_cwrite(CAP_USBCMD, USBCMD_RS, 0); - - hw_cwrite(CAP_USBCMD, USBCMD_RST, USBCMD_RST); - while (hw_cread(CAP_USBCMD, USBCMD_RST)) - udelay(10); /* not RTOS friendly */ - - /* USBMODE should be configured step by step */ - hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE); - hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE); - hw_cwrite(CAP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); /* HW >= 2.3 */ - - if (hw_cread(CAP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) { - pr_err("cannot enter in device mode"); - pr_err("lpm = %i", hw_bank.lpm); - return -ENODEV; - } - - reg = hw_aread(ABS_DCCPARAMS, DCCPARAMS_DEN) >> ffs_nr(DCCPARAMS_DEN); - if (reg == 0 || reg > ENDPT_MAX) - return -ENODEV; - - hw_ep_max = reg; /* cache hw ENDPT_MAX */ - - /* setup lock mode ? */ - - /* ENDPTSETUPSTAT is '0' by default */ - - /* HCSPARAMS.bf.ppc SHOULD BE zero for device */ - - return 0; -} - -/** - * hw_device_state: enables/disables interrupts & starts/stops device (execute - * without interruption) - * @dma: 0 => disable, !0 => enable and set dma engine - * - * This function returns an error code - */ -static int hw_device_state(u32 dma) -{ - if (dma) { - hw_cwrite(CAP_ENDPTLISTADDR, ~0, dma); - /* interrupt, error, port change, reset, sleep/suspend */ - hw_cwrite(CAP_USBINTR, ~0, - USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI); - hw_cwrite(CAP_USBCMD, USBCMD_RS, USBCMD_RS); - } else { - hw_cwrite(CAP_USBCMD, USBCMD_RS, 0); - hw_cwrite(CAP_USBINTR, ~0, 0); - } - return 0; -} - -/** - * hw_ep_flush: flush endpoint fifo (execute without interruption) - * @num: endpoint number - * @dir: endpoint direction - * - * This function returns an error code - */ -static int hw_ep_flush(int num, int dir) -{ - int n = hw_ep_bit(num, dir); - - do { - /* flush any pending transfer */ - hw_cwrite(CAP_ENDPTFLUSH, BIT(n), BIT(n)); - while (hw_cread(CAP_ENDPTFLUSH, BIT(n))) - cpu_relax(); - } while (hw_cread(CAP_ENDPTSTAT, BIT(n))); - - return 0; -} - -/** - * hw_ep_disable: disables endpoint (execute without interruption) - * @num: endpoint number - * @dir: endpoint direction - * - * This function returns an error code - */ -static int hw_ep_disable(int num, int dir) -{ - hw_ep_flush(num, dir); - hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32), - dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0); - return 0; -} - -/** - * hw_ep_enable: enables endpoint (execute without interruption) - * @num: endpoint number - * @dir: endpoint direction - * @type: endpoint type - * - * This function returns an error code - */ -static int hw_ep_enable(int num, int dir, int type) -{ - u32 mask, data; - - if (dir) { - mask = ENDPTCTRL_TXT; /* type */ - data = type << ffs_nr(mask); - - mask |= ENDPTCTRL_TXS; /* unstall */ - mask |= ENDPTCTRL_TXR; /* reset data toggle */ - data |= ENDPTCTRL_TXR; - mask |= ENDPTCTRL_TXE; /* enable */ - data |= ENDPTCTRL_TXE; - } else { - mask = ENDPTCTRL_RXT; /* type */ - data = type << ffs_nr(mask); - - mask |= ENDPTCTRL_RXS; /* unstall */ - mask |= ENDPTCTRL_RXR; /* reset data toggle */ - data |= ENDPTCTRL_RXR; - mask |= ENDPTCTRL_RXE; /* enable */ - data |= ENDPTCTRL_RXE; - } - hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32), mask, data); - return 0; -} - -/** - * hw_ep_get_halt: return endpoint halt status - * @num: endpoint number - * @dir: endpoint direction - * - * This function returns 1 if endpoint halted - */ -static int hw_ep_get_halt(int num, int dir) -{ - u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; - - return hw_cread(CAP_ENDPTCTRL + num * sizeof(u32), mask) ? 1 : 0; -} - -/** - * hw_ep_is_primed: test if endpoint is primed (execute without interruption) - * @num: endpoint number - * @dir: endpoint direction - * - * This function returns true if endpoint primed - */ -static int hw_ep_is_primed(int num, int dir) -{ - u32 reg = hw_cread(CAP_ENDPTPRIME, ~0) | hw_cread(CAP_ENDPTSTAT, ~0); - - return test_bit(hw_ep_bit(num, dir), (void *)®); -} - -/** - * hw_test_and_clear_setup_status: test & clear setup status (execute without - * interruption) - * @n: bit number (endpoint) - * - * This function returns setup status - */ -static int hw_test_and_clear_setup_status(int n) -{ - return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n)); -} - -/** - * hw_ep_prime: primes endpoint (execute without interruption) - * @num: endpoint number - * @dir: endpoint direction - * @is_ctrl: true if control endpoint - * - * This function returns an error code - */ -static int hw_ep_prime(int num, int dir, int is_ctrl) -{ - int n = hw_ep_bit(num, dir); - - /* the caller should flush first */ - if (hw_ep_is_primed(num, dir)) - return -EBUSY; - - if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num))) - return -EAGAIN; - - hw_cwrite(CAP_ENDPTPRIME, BIT(n), BIT(n)); - - while (hw_cread(CAP_ENDPTPRIME, BIT(n))) - cpu_relax(); - if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num))) - return -EAGAIN; - - /* status shoult be tested according with manual but it doesn't work */ - return 0; -} - -/** - * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute - * without interruption) - * @num: endpoint number - * @dir: endpoint direction - * @value: true => stall, false => unstall - * - * This function returns an error code - */ -static int hw_ep_set_halt(int num, int dir, int value) -{ - if (value != 0 && value != 1) - return -EINVAL; - - do { - u32 addr = CAP_ENDPTCTRL + num * sizeof(u32); - u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; - u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR; - - /* data toggle - reserved for EP0 but it's in ESS */ - hw_cwrite(addr, mask_xs|mask_xr, value ? mask_xs : mask_xr); - - } while (value != hw_ep_get_halt(num, dir)); - - 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(int n) -{ - if (n >= REG_BITS) - return -EINVAL; - - hw_cwrite(CAP_USBINTR, BIT(n), 0); - hw_cwrite(CAP_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(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» %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; - - 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, "» 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; - - 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"); |