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rockbox/firmware/target/arm/usb-drv-arc.c
Michael Sevakis 91b850ec42 Get rid of usb_drv_attach() from USB code. 
'Twas an idiosyncrasy of detecting a host upon bus reset, which is
obsolete.

Change-Id: I0adb25e1805022544f52cd0cb766819a367dbde4
2013-05-14 22:13:38 -04:00

1021 lines
36 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Driver for ARC USBOTG Device Controller
*
* Copyright (C) 2007 by Björn Stenberg
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "system.h"
#include "config.h"
#include "string.h"
#include "usb_ch9.h"
#include "usb_core.h"
#include "kernel.h"
#include "panic.h"
#include "usb_drv.h"
/*#define LOGF_ENABLE*/
#include "logf.h"
/* USB device mode registers (Little Endian) */
#define REG_ID (*(volatile unsigned int *)(USB_BASE+0x000))
#define REG_HWGENERAL (*(volatile unsigned int *)(USB_BASE+0x004))
#define REG_HWHOST (*(volatile unsigned int *)(USB_BASE+0x008))
#define REG_HWDEVICE (*(volatile unsigned int *)(USB_BASE+0x00c))
#define REG_TXBUF (*(volatile unsigned int *)(USB_BASE+0x010))
#define REG_RXBUF (*(volatile unsigned int *)(USB_BASE+0x014))
#define REG_CAPLENGTH (*(volatile unsigned char*)(USB_BASE+0x100))
#define REG_DCIVERSION (*(volatile unsigned int *)(USB_BASE+0x120))
#define REG_DCCPARAMS (*(volatile unsigned int *)(USB_BASE+0x124))
#define REG_USBCMD (*(volatile unsigned int *)(USB_BASE+0x140))
#define REG_USBSTS (*(volatile unsigned int *)(USB_BASE+0x144))
#define REG_USBINTR (*(volatile unsigned int *)(USB_BASE+0x148))
#define REG_FRINDEX (*(volatile unsigned int *)(USB_BASE+0x14c))
#define REG_DEVICEADDR (*(volatile unsigned int *)(USB_BASE+0x154))
#define REG_ENDPOINTLISTADDR (*(volatile unsigned int *)(USB_BASE+0x158))
#define REG_BURSTSIZE (*(volatile unsigned int *)(USB_BASE+0x160))
#define REG_ULPI (*(volatile unsigned int *)(USB_BASE+0x170))
#define REG_CONFIGFLAG (*(volatile unsigned int *)(USB_BASE+0x180))
#define REG_PORTSC1 (*(volatile unsigned int *)(USB_BASE+0x184))
#define REG_OTGSC (*(volatile unsigned int *)(USB_BASE+0x1a4))
#define REG_USBMODE (*(volatile unsigned int *)(USB_BASE+0x1a8))
#define REG_ENDPTSETUPSTAT (*(volatile unsigned int *)(USB_BASE+0x1ac))
#define REG_ENDPTPRIME (*(volatile unsigned int *)(USB_BASE+0x1b0))
#define REG_ENDPTFLUSH (*(volatile unsigned int *)(USB_BASE+0x1b4))
#define REG_ENDPTSTATUS (*(volatile unsigned int *)(USB_BASE+0x1b8))
#define REG_ENDPTCOMPLETE (*(volatile unsigned int *)(USB_BASE+0x1bc))
#define REG_ENDPTCTRL0 (*(volatile unsigned int *)(USB_BASE+0x1c0))
#define REG_ENDPTCTRL1 (*(volatile unsigned int *)(USB_BASE+0x1c4))
#define REG_ENDPTCTRL2 (*(volatile unsigned int *)(USB_BASE+0x1c8))
#define REG_ENDPTCTRL(_x_) (*(volatile unsigned int *)(USB_BASE+0x1c0+4*(_x_)))
/* Frame Index Register Bit Masks */
#define USB_FRINDEX_MASKS (0x3fff)
/* USB CMD Register Bit Masks */
#define USBCMD_RUN (0x00000001)
#define USBCMD_CTRL_RESET (0x00000002)
#define USBCMD_PERIODIC_SCHEDULE_EN (0x00000010)
#define USBCMD_ASYNC_SCHEDULE_EN (0x00000020)
#define USBCMD_INT_AA_DOORBELL (0x00000040)
#define USBCMD_ASP (0x00000300)
#define USBCMD_ASYNC_SCH_PARK_EN (0x00000800)
#define USBCMD_SUTW (0x00002000)
#define USBCMD_ATDTW (0x00004000)
#define USBCMD_ITC (0x00FF0000)
/* bit 15,3,2 are frame list size */
#define USBCMD_FRAME_SIZE_1024 (0x00000000)
#define USBCMD_FRAME_SIZE_512 (0x00000004)
#define USBCMD_FRAME_SIZE_256 (0x00000008)
#define USBCMD_FRAME_SIZE_128 (0x0000000C)
#define USBCMD_FRAME_SIZE_64 (0x00008000)
#define USBCMD_FRAME_SIZE_32 (0x00008004)
#define USBCMD_FRAME_SIZE_16 (0x00008008)
#define USBCMD_FRAME_SIZE_8 (0x0000800C)
/* bit 9-8 are async schedule park mode count */
#define USBCMD_ASP_00 (0x00000000)
#define USBCMD_ASP_01 (0x00000100)
#define USBCMD_ASP_10 (0x00000200)
#define USBCMD_ASP_11 (0x00000300)
#define USBCMD_ASP_BIT_POS (8)
/* bit 23-16 are interrupt threshold control */
#define USBCMD_ITC_NO_THRESHOLD (0x00000000)
#define USBCMD_ITC_1_MICRO_FRM (0x00010000)
#define USBCMD_ITC_2_MICRO_FRM (0x00020000)
#define USBCMD_ITC_4_MICRO_FRM (0x00040000)
#define USBCMD_ITC_8_MICRO_FRM (0x00080000)
#define USBCMD_ITC_16_MICRO_FRM (0x00100000)
#define USBCMD_ITC_32_MICRO_FRM (0x00200000)
#define USBCMD_ITC_64_MICRO_FRM (0x00400000)
#define USBCMD_ITC_BIT_POS (16)
/* USB STS Register Bit Masks */
#define USBSTS_INT (0x00000001)
#define USBSTS_ERR (0x00000002)
#define USBSTS_PORT_CHANGE (0x00000004)
#define USBSTS_FRM_LST_ROLL (0x00000008)
#define USBSTS_SYS_ERR (0x00000010) /* not used */
#define USBSTS_IAA (0x00000020)
#define USBSTS_RESET (0x00000040)
#define USBSTS_SOF (0x00000080)
#define USBSTS_SUSPEND (0x00000100)
#define USBSTS_HC_HALTED (0x00001000)
#define USBSTS_RCL (0x00002000)
#define USBSTS_PERIODIC_SCHEDULE (0x00004000)
#define USBSTS_ASYNC_SCHEDULE (0x00008000)
/* USB INTR Register Bit Masks */
#define USBINTR_INT_EN (0x00000001)
#define USBINTR_ERR_INT_EN (0x00000002)
#define USBINTR_PTC_DETECT_EN (0x00000004)
#define USBINTR_FRM_LST_ROLL_EN (0x00000008)
#define USBINTR_SYS_ERR_EN (0x00000010)
#define USBINTR_ASYN_ADV_EN (0x00000020)
#define USBINTR_RESET_EN (0x00000040)
#define USBINTR_SOF_EN (0x00000080)
#define USBINTR_DEVICE_SUSPEND (0x00000100)
/* ULPI Register Bit Masks */
#define ULPI_ULPIWU (0x80000000)
#define ULPI_ULPIRUN (0x40000000)
#define ULPI_ULPIRW (0x20000000)
#define ULPI_ULPISS (0x08000000)
#define ULPI_ULPIPORT (0x07000000)
#define ULPI_ULPIADDR (0x00FF0000)
#define ULPI_ULPIDATRD (0x0000FF00)
#define ULPI_ULPIDATWR (0x000000FF)
/* Device Address bit masks */
#define USBDEVICEADDRESS_MASK (0xFE000000)
#define USBDEVICEADDRESS_BIT_POS (25)
/* endpoint list address bit masks */
#define USB_EP_LIST_ADDRESS_MASK (0xfffff800)
/* PORTSCX Register Bit Masks */
#define PORTSCX_CURRENT_CONNECT_STATUS (0x00000001)
#define PORTSCX_CONNECT_STATUS_CHANGE (0x00000002)
#define PORTSCX_PORT_ENABLE (0x00000004)
#define PORTSCX_PORT_EN_DIS_CHANGE (0x00000008)
#define PORTSCX_OVER_CURRENT_ACT (0x00000010)
#define PORTSCX_OVER_CURRENT_CHG (0x00000020)
#define PORTSCX_PORT_FORCE_RESUME (0x00000040)
#define PORTSCX_PORT_SUSPEND (0x00000080)
#define PORTSCX_PORT_RESET (0x00000100)
#define PORTSCX_LINE_STATUS_BITS (0x00000C00)
#define PORTSCX_PORT_POWER (0x00001000)
#define PORTSCX_PORT_INDICTOR_CTRL (0x0000C000)
#define PORTSCX_PORT_TEST_CTRL (0x000F0000)
#define PORTSCX_WAKE_ON_CONNECT_EN (0x00100000)
#define PORTSCX_WAKE_ON_CONNECT_DIS (0x00200000)
#define PORTSCX_WAKE_ON_OVER_CURRENT (0x00400000)
#define PORTSCX_PHY_LOW_POWER_SPD (0x00800000)
#define PORTSCX_PORT_FORCE_FULL_SPEED (0x01000000)
#define PORTSCX_PORT_SPEED_MASK (0x0C000000)
#define PORTSCX_PORT_WIDTH (0x10000000)
#define PORTSCX_PHY_TYPE_SEL (0xC0000000)
/* bit 11-10 are line status */
#define PORTSCX_LINE_STATUS_SE0 (0x00000000)
#define PORTSCX_LINE_STATUS_JSTATE (0x00000400)
#define PORTSCX_LINE_STATUS_KSTATE (0x00000800)
#define PORTSCX_LINE_STATUS_UNDEF (0x00000C00)
#define PORTSCX_LINE_STATUS_BIT_POS (10)
/* bit 15-14 are port indicator control */
#define PORTSCX_PIC_OFF (0x00000000)
#define PORTSCX_PIC_AMBER (0x00004000)
#define PORTSCX_PIC_GREEN (0x00008000)
#define PORTSCX_PIC_UNDEF (0x0000C000)
#define PORTSCX_PIC_BIT_POS (14)
/* bit 19-16 are port test control */
#define PORTSCX_PTC_DISABLE (0x00000000)
#define PORTSCX_PTC_JSTATE (0x00010000)
#define PORTSCX_PTC_KSTATE (0x00020000)
#define PORTSCX_PTC_SE0NAK (0x00030000)
#define PORTSCX_PTC_PACKET (0x00040000)
#define PORTSCX_PTC_FORCE_EN (0x00050000)
#define PORTSCX_PTC_BIT_POS (16)
/* bit 27-26 are port speed */
#define PORTSCX_PORT_SPEED_FULL (0x00000000)
#define PORTSCX_PORT_SPEED_LOW (0x04000000)
#define PORTSCX_PORT_SPEED_HIGH (0x08000000)
#define PORTSCX_PORT_SPEED_UNDEF (0x0C000000)
#define PORTSCX_SPEED_BIT_POS (26)
/* bit 28 is parallel transceiver width for UTMI interface */
#define PORTSCX_PTW (0x10000000)
#define PORTSCX_PTW_8BIT (0x00000000)
#define PORTSCX_PTW_16BIT (0x10000000)
/* bit 31-30 are port transceiver select */
#define PORTSCX_PTS_UTMI (0x00000000)
#define PORTSCX_PTS_CLASSIC (0x40000000)
#define PORTSCX_PTS_ULPI (0x80000000)
#define PORTSCX_PTS_FSLS (0xC0000000)
#define PORTSCX_PTS_BIT_POS (30)
/* USB MODE Register Bit Masks */
#define USBMODE_CTRL_MODE_IDLE (0x00000000)
#define USBMODE_CTRL_MODE_DEVICE (0x00000002)
#define USBMODE_CTRL_MODE_HOST (0x00000003)
#define USBMODE_CTRL_MODE_RSV (0x00000001)
#define USBMODE_SETUP_LOCK_OFF (0x00000008)
#define USBMODE_STREAM_DISABLE (0x00000010)
/* Endpoint Flush Register */
#define EPFLUSH_TX_OFFSET (0x00010000)
#define EPFLUSH_RX_OFFSET (0x00000000)
/* Endpoint Setup Status bit masks */
#define EPSETUP_STATUS_MASK (0x0000003F)
#define EPSETUP_STATUS_EP0 (0x00000001)
/* ENDPOINTCTRLx Register Bit Masks */
#define EPCTRL_TX_ENABLE (0x00800000)
#define EPCTRL_TX_DATA_TOGGLE_RST (0x00400000) /* Not EP0 */
#define EPCTRL_TX_DATA_TOGGLE_INH (0x00200000) /* Not EP0 */
#define EPCTRL_TX_TYPE (0x000C0000)
#define EPCTRL_TX_DATA_SOURCE (0x00020000) /* Not EP0 */
#define EPCTRL_TX_EP_STALL (0x00010000)
#define EPCTRL_RX_ENABLE (0x00000080)
#define EPCTRL_RX_DATA_TOGGLE_RST (0x00000040) /* Not EP0 */
#define EPCTRL_RX_DATA_TOGGLE_INH (0x00000020) /* Not EP0 */
#define EPCTRL_RX_TYPE (0x0000000C)
#define EPCTRL_RX_DATA_SINK (0x00000002) /* Not EP0 */
#define EPCTRL_RX_EP_STALL (0x00000001)
/* bit 19-18 and 3-2 are endpoint type */
#define EPCTRL_TX_EP_TYPE_SHIFT (18)
#define EPCTRL_RX_EP_TYPE_SHIFT (2)
/* pri_ctrl Register Bit Masks */
#define PRI_CTRL_PRI_LVL1 (0x0000000C)
#define PRI_CTRL_PRI_LVL0 (0x00000003)
/* si_ctrl Register Bit Masks */
#define SI_CTRL_ERR_DISABLE (0x00000010)
#define SI_CTRL_IDRC_DISABLE (0x00000008)
#define SI_CTRL_RD_SAFE_EN (0x00000004)
#define SI_CTRL_RD_PREFETCH_DISABLE (0x00000002)
#define SI_CTRL_RD_PREFEFETCH_VAL (0x00000001)
/* control Register Bit Masks */
#define USB_CTRL_IOENB (0x00000004)
#define USB_CTRL_ULPI_INT0EN (0x00000001)
/* OTGSC Register Bit Masks */
#define OTGSC_B_SESSION_VALID (0x00000800)
#define OTGSC_A_VBUS_VALID (0x00000200)
#define QH_MULT_POS (30)
#define QH_ZLT_SEL (0x20000000)
#define QH_MAX_PKT_LEN_POS (16)
#define QH_IOS (0x00008000)
#define QH_NEXT_TERMINATE (0x00000001)
#define QH_IOC (0x00008000)
#define QH_MULTO (0x00000C00)
#define QH_STATUS_HALT (0x00000040)
#define QH_STATUS_ACTIVE (0x00000080)
#define EP_QUEUE_CURRENT_OFFSET_MASK (0x00000FFF)
#define EP_QUEUE_HEAD_NEXT_POINTER_MASK (0xFFFFFFE0)
#define EP_QUEUE_FRINDEX_MASK (0x000007FF)
#define EP_MAX_LENGTH_TRANSFER (0x4000)
#define DTD_NEXT_TERMINATE (0x00000001)
#define DTD_IOC (0x00008000)
#define DTD_STATUS_ACTIVE (0x00000080)
#define DTD_STATUS_HALTED (0x00000040)
#define DTD_STATUS_DATA_BUFF_ERR (0x00000020)
#define DTD_STATUS_TRANSACTION_ERR (0x00000008)
#define DTD_RESERVED_FIELDS (0x80007300)
#define DTD_ADDR_MASK (0xFFFFFFE0)
#define DTD_PACKET_SIZE (0x7FFF0000)
#define DTD_LENGTH_BIT_POS (16)
#define DTD_ERROR_MASK (DTD_STATUS_HALTED | \
DTD_STATUS_DATA_BUFF_ERR | \
DTD_STATUS_TRANSACTION_ERR)
#define DTD_RESERVED_LENGTH_MASK 0x0001ffff
#define DTD_RESERVED_IN_USE 0x80000000
#define DTD_RESERVED_PIPE_MASK 0x0ff00000
#define DTD_RESERVED_PIPE_OFFSET 20
/*-------------------------------------------------------------------------*/
/* 4 transfer descriptors per endpoint allow 64k transfers, which is the usual MSC
transfer size, so it seems like a good size */
#define NUM_TDS_PER_EP 4
typedef struct usb_endpoint
{
bool allocated[2];
short type[2];
short max_pkt_size[2];
} usb_endpoint_t;
static usb_endpoint_t endpoints[USB_NUM_ENDPOINTS];
/* manual: 32.13.2 Endpoint Transfer Descriptor (dTD) */
struct transfer_descriptor {
unsigned int next_td_ptr; /* Next TD pointer(31-5), T(0) set
indicate invalid */
unsigned int size_ioc_sts; /* Total bytes (30-16), IOC (15),
MultO(11-10), STS (7-0) */
unsigned int buff_ptr0; /* Buffer pointer Page 0 */
unsigned int buff_ptr1; /* Buffer pointer Page 1 */
unsigned int buff_ptr2; /* Buffer pointer Page 2 */
unsigned int buff_ptr3; /* Buffer pointer Page 3 */
unsigned int buff_ptr4; /* Buffer pointer Page 4 */
unsigned int reserved;
} __attribute__ ((packed));
static struct transfer_descriptor td_array[USB_NUM_ENDPOINTS*2*NUM_TDS_PER_EP]
USB_DEVBSS_ATTR __attribute__((aligned(32)));
/* manual: 32.13.1 Endpoint Queue Head (dQH) */
struct queue_head {
unsigned int max_pkt_length; /* Mult(31-30) , Zlt(29) , Max Pkt len
and IOS(15) */
unsigned int curr_dtd_ptr; /* Current dTD Pointer(31-5) */
struct transfer_descriptor dtd; /* dTD overlay */
unsigned int setup_buffer[2]; /* Setup data 8 bytes */
unsigned int reserved; /* for software use, pointer to the first TD */
unsigned int status; /* for software use, status of chain in progress */
unsigned int length; /* for software use, transfered bytes of chain in progress */
unsigned int wait; /* for softwate use, indicates if the transfer is blocking */
} __attribute__((packed));
static struct queue_head qh_array[USB_NUM_ENDPOINTS*2]
USB_QHARRAY_ATTR;
static struct semaphore transfer_completion_signal[USB_NUM_ENDPOINTS*2]
SHAREDBSS_ATTR;
static const unsigned int pipe2mask[] = {
0x01, 0x010000,
0x02, 0x020000,
0x04, 0x040000,
0x08, 0x080000,
0x10, 0x100000,
};
/*-------------------------------------------------------------------------*/
static void transfer_completed(void);
static void control_received(void);
static int prime_transfer(int ep_num, void* ptr, int len, bool send, bool wait);
static void prepare_td(struct transfer_descriptor* td,
struct transfer_descriptor* previous_td, void *ptr, int len,int pipe);
static void bus_reset(void);
static void init_control_queue_heads(void);
static void init_queue_heads(void);
static void init_endpoints(void);
/*-------------------------------------------------------------------------*/
static void usb_drv_stop(void)
{
/* disable interrupts */
REG_USBINTR = 0;
/* stop usb controller (disconnect) */
REG_USBCMD &= ~USBCMD_RUN;
}
static void usb_drv_reset(void)
{
int oldlevel = disable_irq_save();
REG_USBCMD &= ~USBCMD_RUN;
restore_irq(oldlevel);
#ifdef USB_PORTSCX_PHY_TYPE
/* If a PHY type is specified, set it now */
REG_PORTSC1 = (REG_PORTSC1 & ~PORTSCX_PHY_TYPE_SEL) | USB_PORTSCX_PHY_TYPE;
#endif
sleep(HZ/20);
REG_USBCMD |= USBCMD_CTRL_RESET;
while (REG_USBCMD & USBCMD_CTRL_RESET);
#if CONFIG_CPU == PP5022 || CONFIG_CPU == PP5024
/* On a CPU which identifies as a PP5022, this
initialization must be done after USB is reset.
*/
outl(inl(0x70000060) | 0xF, 0x70000060);
outl(inl(0x70000028) | 0x10000, 0x70000028);
outl(inl(0x70000028) & ~0x10000, 0x70000028);
outl(inl(0x70000060) & ~0x20, 0x70000060);
udelay(10);
outl(inl(0x70000060) | 0x20, 0x70000060);
udelay(10);
outl((inl(0x70000060) & ~0xF) | 4, 0x70000060);
udelay(10);
outl(inl(0x70000060) & ~0x20, 0x70000060);
udelay(10);
outl(inl(0x70000060) & ~0xF, 0x70000060);
udelay(10);
outl(inl(0x70000060) | 0x20, 0x70000060);
udelay(10);
outl(inl(0x70000028) | 0x800, 0x70000028);
outl(inl(0x70000028) & ~0x800, 0x70000028);
while ((inl(0x70000028) & 0x80) == 0);
#endif
}
/* One-time driver startup init */
void usb_drv_startup(void)
{
/* Initialize all the signal objects once */
int i;
for(i=0;i<USB_NUM_ENDPOINTS*2;i++) {
semaphore_init(&transfer_completion_signal[i], 1, 0);
}
}
#ifdef LOGF_ENABLE
#define XFER_DIR_STR(dir) ((dir) ? "IN" : "OUT")
#define XFER_TYPE_STR(type) \
((type) == USB_ENDPOINT_XFER_CONTROL ? "CTRL" : \
((type) == USB_ENDPOINT_XFER_ISOC ? "ISOC" : \
((type) == USB_ENDPOINT_XFER_BULK ? "BULK" : \
((type) == USB_ENDPOINT_XFER_INT ? "INTR" : "INVL"))))
static void log_ep(int ep_num, int ep_dir, char* prefix)
{
usb_endpoint_t* endpoint = &endpoints[ep_num];
logf("%s: ep%d %s %s %d", prefix, ep_num, XFER_DIR_STR(ep_dir),
XFER_TYPE_STR(endpoint->type[ep_dir]),
endpoint->max_pkt_size[ep_dir]);
}
#else
#undef log_ep
#define log_ep(...)
#endif
/* manual: 32.14.1 Device Controller Initialization */
void usb_drv_init(void)
{
/* USB core decides */
usb_drv_reset();
REG_USBMODE = USBMODE_CTRL_MODE_DEVICE;
#ifdef USB_NO_HIGH_SPEED
/* Force device to full speed */
/* See 32.9.5.9.2 */
REG_PORTSC1 |= PORTSCX_PORT_FORCE_FULL_SPEED;
#endif
init_control_queue_heads();
memset(td_array, 0, sizeof td_array);
REG_ENDPOINTLISTADDR = (unsigned int)qh_array;
REG_DEVICEADDR = 0;
/* enable USB interrupts */
REG_USBINTR =
USBINTR_INT_EN |
USBINTR_ERR_INT_EN |
USBINTR_PTC_DETECT_EN |
USBINTR_RESET_EN;
usb_drv_int_enable(true);
/* go go go */
REG_USBCMD |= USBCMD_RUN;
logf("usb_drv_init() finished");
logf("usb id %x", REG_ID);
logf("usb dciversion %x", REG_DCIVERSION);
logf("usb dccparams %x", REG_DCCPARAMS);
/* now a bus reset will occur. see bus_reset() */
}
void usb_drv_exit(void)
{
usb_drv_stop();
/* TODO : is one of these needed to save power ?
REG_PORTSC1 |= PORTSCX_PHY_LOW_POWER_SPD;
REG_USBCMD |= USBCMD_CTRL_RESET;
*/
usb_drv_int_enable(false);
}
void usb_drv_int(void)
{
unsigned int usbintr = REG_USBINTR; /* Only watch enabled ints */
unsigned int status = REG_USBSTS & usbintr;
#if 0
if (status & USBSTS_INT) logf("int: usb ioc");
if (status & USBSTS_ERR) logf("int: usb err");
if (status & USBSTS_PORT_CHANGE) logf("int: portchange");
if (status & USBSTS_RESET) logf("int: reset");
#endif
/* usb transaction interrupt */
if (status & USBSTS_INT) {
REG_USBSTS = USBSTS_INT;
/* a control packet? */
if (REG_ENDPTSETUPSTAT & EPSETUP_STATUS_EP0) {
control_received();
}
if (REG_ENDPTCOMPLETE)
transfer_completed();
}
/* error interrupt */
if (status & USBSTS_ERR) {
REG_USBSTS = USBSTS_ERR;
logf("usb error int");
}
/* reset interrupt */
if (status & USBSTS_RESET) {
REG_USBSTS = USBSTS_RESET;
bus_reset();
usb_core_bus_reset(); /* tell mom */
}
/* port change */
if (status & USBSTS_PORT_CHANGE) {
REG_USBSTS = USBSTS_PORT_CHANGE;
}
}
bool usb_drv_stalled(int endpoint,bool in)
{
if(in) {
return ((REG_ENDPTCTRL(EP_NUM(endpoint)) & EPCTRL_TX_EP_STALL)!=0);
}
else {
return ((REG_ENDPTCTRL(EP_NUM(endpoint)) & EPCTRL_RX_EP_STALL)!=0);
}
}
void usb_drv_stall(int endpoint, bool stall, bool in)
{
int ep_num = EP_NUM(endpoint);
logf("%sstall %d", stall ? "" : "un", ep_num);
if(in) {
if (stall) {
REG_ENDPTCTRL(ep_num) |= EPCTRL_TX_EP_STALL;
}
else {
REG_ENDPTCTRL(ep_num) &= ~EPCTRL_TX_EP_STALL;
}
}
else {
if (stall) {
REG_ENDPTCTRL(ep_num) |= EPCTRL_RX_EP_STALL;
}
else {
REG_ENDPTCTRL(ep_num) &= ~EPCTRL_RX_EP_STALL;
}
}
}
int usb_drv_send_nonblocking(int endpoint, void* ptr, int length)
{
return prime_transfer(EP_NUM(endpoint), ptr, length, true, false);
}
int usb_drv_send(int endpoint, void* ptr, int length)
{
return prime_transfer(EP_NUM(endpoint), ptr, length, true, true);
}
int usb_drv_recv(int endpoint, void* ptr, int length)
{
//logf("usbrecv(%x, %d)", ptr, length);
return prime_transfer(EP_NUM(endpoint), ptr, length, false, false);
}
int usb_drv_port_speed(void)
{
return (REG_PORTSC1 & 0x08000000) ? 1 : 0;
}
bool usb_drv_connected(void)
{
return (REG_PORTSC1 &
(PORTSCX_PORT_SUSPEND | PORTSCX_CURRENT_CONNECT_STATUS))
== PORTSCX_CURRENT_CONNECT_STATUS;
}
bool usb_drv_powered(void)
{
/* true = bus 4V4 ok */
return (REG_OTGSC & OTGSC_A_VBUS_VALID) ? true : false;
}
void usb_drv_set_address(int address)
{
REG_DEVICEADDR = address << USBDEVICEADDRESS_BIT_POS;
init_queue_heads();
init_endpoints();
}
void usb_drv_reset_endpoint(int endpoint, bool send)
{
int pipe = EP_NUM(endpoint) * 2 + (send ? 1 : 0);
unsigned int mask = pipe2mask[pipe];
REG_ENDPTFLUSH = mask;
while (REG_ENDPTFLUSH & mask);
}
void usb_drv_set_test_mode(int mode)
{
switch(mode){
case 0:
REG_PORTSC1 &= ~PORTSCX_PORT_TEST_CTRL;
break;
case 1:
REG_PORTSC1 |= PORTSCX_PTC_JSTATE;
break;
case 2:
REG_PORTSC1 |= PORTSCX_PTC_KSTATE;
break;
case 3:
REG_PORTSC1 |= PORTSCX_PTC_SE0NAK;
break;
case 4:
REG_PORTSC1 |= PORTSCX_PTC_PACKET;
break;
case 5:
REG_PORTSC1 |= PORTSCX_PTC_FORCE_EN;
break;
}
usb_drv_reset();
REG_USBCMD |= USBCMD_RUN;
}
/*-------------------------------------------------------------------------*/
/* manual: 32.14.5.2 */
static int prime_transfer(int ep_num, void* ptr, int len, bool send, bool wait)
{
int rc = 0;
int pipe = ep_num * 2 + (send ? 1 : 0);
unsigned int mask = pipe2mask[pipe];
struct queue_head* qh = &qh_array[pipe];
static long last_tick;
struct transfer_descriptor *new_td, *cur_td, *prev_td;
int oldlevel = disable_irq_save();
/*
if (send && ep_num > EP_CONTROL) {
logf("usb: sent %d bytes", len);
}
*/
qh->status = 0;
qh->wait = wait;
new_td=&td_array[pipe*NUM_TDS_PER_EP];
cur_td=new_td;
prev_td=0;
int tdlen;
do
{
tdlen=MIN(len,16384);
prepare_td(cur_td, prev_td, ptr, tdlen,pipe);
ptr+=tdlen;
prev_td=cur_td;
cur_td++;
len-=tdlen;
}
while(len>0);
//logf("starting ep %d %s",ep_num,send?"send":"receive");
qh->dtd.next_td_ptr = (unsigned int)new_td;
qh->dtd.size_ioc_sts &= ~(QH_STATUS_HALT | QH_STATUS_ACTIVE);
REG_ENDPTPRIME |= mask;
if(ep_num == EP_CONTROL && (REG_ENDPTSETUPSTAT & EPSETUP_STATUS_EP0)) {
/* 32.14.3.2.2 */
logf("new setup arrived");
rc = -4;
goto pt_error;
}
last_tick = current_tick;
while ((REG_ENDPTPRIME & mask)) {
if (REG_USBSTS & USBSTS_RESET) {
rc = -1;
goto pt_error;
}
if (TIME_AFTER(current_tick, last_tick + HZ/4)) {
logf("prime timeout");
rc = -2;
goto pt_error;
}
}
if (!(REG_ENDPTSTATUS & mask)) {
if(REG_ENDPTCOMPLETE & mask)
{
logf("endpoint completed fast! %d %d %x", ep_num, pipe, qh->dtd.size_ioc_sts & 0xff);
}
else
{
logf("no prime! %d %d %x", ep_num, pipe, qh->dtd.size_ioc_sts & 0xff);
rc = -3;
goto pt_error;
}
}
if(ep_num == EP_CONTROL && (REG_ENDPTSETUPSTAT & EPSETUP_STATUS_EP0)) {
/* 32.14.3.2.2 */
logf("new setup arrived");
rc = -4;
goto pt_error;
}
restore_irq(oldlevel);
if (wait) {
/* wait for transfer to finish */
semaphore_wait(&transfer_completion_signal[pipe], TIMEOUT_BLOCK);
if(qh->status!=0) {
/* No need to cancel wait here since it was done and the signal
* came. */
return -5;
}
//logf("all tds done");
}
pt_error:
if(rc<0)
restore_irq(oldlevel);
/* Error status must make sure an abandoned wakeup signal isn't left */
if (rc < 0 && wait) {
/* Cancel wait */
qh->wait = 0;
/* Make sure to remove any signal if interrupt fired before we zeroed
* qh->wait. Could happen during a bus reset for example. */
semaphore_wait(&transfer_completion_signal[pipe], TIMEOUT_NOBLOCK);
}
return rc;
}
void usb_drv_cancel_all_transfers(void)
{
int i;
REG_ENDPTFLUSH = ~0;
while (REG_ENDPTFLUSH);
memset(td_array, 0, sizeof td_array);
for(i=0;i<USB_NUM_ENDPOINTS*2;i++) {
if(qh_array[i].wait) {
qh_array[i].wait=0;
qh_array[i].status=DTD_STATUS_HALTED;
semaphore_release(&transfer_completion_signal[i]);
}
}
}
int usb_drv_request_endpoint(int type, int dir)
{
int ep_num, ep_dir;
short ep_type;
/* Safety */
ep_dir = EP_DIR(dir);
ep_type = type & USB_ENDPOINT_XFERTYPE_MASK;
logf("req: %s %s", XFER_DIR_STR(ep_dir), XFER_TYPE_STR(ep_type));
/* Find an available ep/dir pair */
for (ep_num=1;ep_num<USB_NUM_ENDPOINTS;ep_num++) {
usb_endpoint_t* endpoint=&endpoints[ep_num];
int other_dir=(ep_dir ? 0:1);
if (endpoint->allocated[ep_dir])
continue;
if (endpoint->allocated[other_dir] &&
endpoint->type[other_dir] != ep_type) {
logf("ep of different type!");
continue;
}
endpoint->allocated[ep_dir] = 1;
endpoint->type[ep_dir] = ep_type;
log_ep(ep_num, ep_dir, "add");
return (ep_num | (dir & USB_ENDPOINT_DIR_MASK));
}
return -1;
}
void usb_drv_release_endpoint(int ep)
{
int ep_num = EP_NUM(ep);
int ep_dir = EP_DIR(ep);
log_ep(ep_num, ep_dir, "rel");
endpoints[ep_num].allocated[ep_dir] = 0;
}
static void prepare_td(struct transfer_descriptor* td,
struct transfer_descriptor* previous_td,
void *ptr, int len,int pipe)
{
//logf("adding a td : %d",len);
/* FIXME td allow iso packets per frame override but we don't use it here */
memset(td, 0, sizeof(struct transfer_descriptor));
td->next_td_ptr = DTD_NEXT_TERMINATE;
td->size_ioc_sts = (len<< DTD_LENGTH_BIT_POS) |
DTD_STATUS_ACTIVE | DTD_IOC;
td->buff_ptr0 = (unsigned int)ptr;
td->buff_ptr1 = ((unsigned int)ptr & 0xfffff000) + 0x1000;
td->buff_ptr2 = ((unsigned int)ptr & 0xfffff000) + 0x2000;
td->buff_ptr3 = ((unsigned int)ptr & 0xfffff000) + 0x3000;
td->buff_ptr4 = ((unsigned int)ptr & 0xfffff000) + 0x4000;
td->reserved |= DTD_RESERVED_LENGTH_MASK & len;
td->reserved |= DTD_RESERVED_IN_USE;
td->reserved |= (pipe << DTD_RESERVED_PIPE_OFFSET);
if (previous_td != 0) {
previous_td->next_td_ptr=(unsigned int)td;
previous_td->size_ioc_sts&=~DTD_IOC;
}
}
static void control_received(void)
{
int i;
/* copy setup data from packet */
static unsigned int tmp[2];
tmp[0] = qh_array[0].setup_buffer[0];
tmp[1] = qh_array[0].setup_buffer[1];
/* acknowledge packet recieved */
REG_ENDPTSETUPSTAT = EPSETUP_STATUS_EP0;
/* Stop pending control transfers */
for(i=0;i<2;i++) {
if(qh_array[i].wait) {
qh_array[i].wait=0;
qh_array[i].status=DTD_STATUS_HALTED;
semaphore_release(&transfer_completion_signal[i]);
}
}
usb_core_control_request((struct usb_ctrlrequest*)tmp);
}
static void transfer_completed(void)
{
int ep;
unsigned int mask = REG_ENDPTCOMPLETE;
REG_ENDPTCOMPLETE = mask;
for (ep=0; ep<USB_NUM_ENDPOINTS; ep++) {
int dir;
for (dir=0; dir<2; dir++) {
int pipe = ep * 2 + dir;
if (mask & pipe2mask[pipe]) {
struct queue_head* qh = &qh_array[pipe];
int length=0;
struct transfer_descriptor* td=&td_array[pipe*NUM_TDS_PER_EP];
while(td!=(struct transfer_descriptor*)DTD_NEXT_TERMINATE && td!=0)
{
/* It seems that the controller sets the pipe bit to one even if the TD
* dosn't have the IOC bit set. So we have the rely the active status bit
* to check that all the TDs of the transfer are really finished and let
* the transfer continue if it's no the case */
if(td->size_ioc_sts & DTD_STATUS_ACTIVE)
{
logf("skip half finished transfer");
goto Lskip;
}
length += ((td->reserved & DTD_RESERVED_LENGTH_MASK) -
((td->size_ioc_sts & DTD_PACKET_SIZE) >> DTD_LENGTH_BIT_POS));
td=(struct transfer_descriptor*) td->next_td_ptr;
}
if(qh->wait) {
qh->wait=0;
semaphore_release(&transfer_completion_signal[pipe]);
}
usb_core_transfer_complete(ep, dir?USB_DIR_IN:USB_DIR_OUT,
qh->status, length);
Lskip:
continue;
}
}
}
}
/* manual: 32.14.2.1 Bus Reset */
static void bus_reset(void)
{
int i;
logf("usb bus_reset");
REG_DEVICEADDR = 0;
REG_ENDPTSETUPSTAT = REG_ENDPTSETUPSTAT;
REG_ENDPTCOMPLETE = REG_ENDPTCOMPLETE;
for (i=0; i<100; i++) {
if (!REG_ENDPTPRIME)
break;
if (REG_USBSTS & USBSTS_RESET) {
logf("usb: double reset");
return;
}
udelay(100);
}
if (REG_ENDPTPRIME) {
logf("usb: short reset timeout");
}
usb_drv_cancel_all_transfers();
if (!(REG_PORTSC1 & PORTSCX_PORT_RESET)) {
logf("usb: slow reset!");
}
}
/* manual: 32.14.4.1 Queue Head Initialization */
static void init_control_queue_heads(void)
{
memset(qh_array, 0, sizeof qh_array);
/*** control ***/
qh_array[EP_CONTROL].max_pkt_length = 64 << QH_MAX_PKT_LEN_POS | QH_IOS;
qh_array[EP_CONTROL].dtd.next_td_ptr = QH_NEXT_TERMINATE;
qh_array[EP_CONTROL+1].max_pkt_length = 64 << QH_MAX_PKT_LEN_POS;
qh_array[EP_CONTROL+1].dtd.next_td_ptr = QH_NEXT_TERMINATE;
}
/* manual: 32.14.4.1 Queue Head Initialization */
static void init_queue_heads(void)
{
/* FIXME the packetsize for isochronous transfers is 1023 : 1024 but
* the current code only support one type of packet size so we restrict
* isochronous packet size for now also */
int packetsize = (usb_drv_port_speed() ? 512 : 64);
int i;
/* TODO: this should take ep_allocation into account */
for (i=1;i<USB_NUM_ENDPOINTS;i++) {
/* OUT */
if(endpoints[i].type[DIR_OUT] == USB_ENDPOINT_XFER_ISOC)
/* FIXME: we can adjust the number of packets per frame, currently use one */
qh_array[i*2].max_pkt_length = packetsize << QH_MAX_PKT_LEN_POS | QH_ZLT_SEL | 1 << QH_MULT_POS;
else
qh_array[i*2].max_pkt_length = packetsize << QH_MAX_PKT_LEN_POS | QH_ZLT_SEL;
qh_array[i*2].dtd.next_td_ptr = QH_NEXT_TERMINATE;
/* IN */
if(endpoints[i].type[DIR_IN] == USB_ENDPOINT_XFER_ISOC)
/* FIXME: we can adjust the number of packets per frame, currently use one */
qh_array[i*2+1].max_pkt_length = packetsize << QH_MAX_PKT_LEN_POS | QH_ZLT_SEL | 1 << QH_MULT_POS;
else
qh_array[i*2+1].max_pkt_length = packetsize << QH_MAX_PKT_LEN_POS | QH_ZLT_SEL;
qh_array[i*2+1].dtd.next_td_ptr = QH_NEXT_TERMINATE;
}
}
static void init_endpoints(void)
{
int ep_num;
logf("init_endpoints");
/* RX/TX from the device POV: OUT/IN, respectively */
for(ep_num=1;ep_num<USB_NUM_ENDPOINTS;ep_num++) {
usb_endpoint_t *endpoint = &endpoints[ep_num];
/* manual: 32.9.5.18 (Caution): Leaving an unconfigured endpoint control
* will cause undefined behavior for the data pid tracking on the active
* endpoint/direction. */
if (!endpoint->allocated[DIR_OUT])
endpoint->type[DIR_OUT] = USB_ENDPOINT_XFER_BULK;
if (!endpoint->allocated[DIR_IN])
endpoint->type[DIR_IN] = USB_ENDPOINT_XFER_BULK;
REG_ENDPTCTRL(ep_num) =
EPCTRL_RX_DATA_TOGGLE_RST | EPCTRL_RX_ENABLE |
EPCTRL_TX_DATA_TOGGLE_RST | EPCTRL_TX_ENABLE |
(endpoint->type[DIR_OUT] << EPCTRL_RX_EP_TYPE_SHIFT) |
(endpoint->type[DIR_IN] << EPCTRL_TX_EP_TYPE_SHIFT);
}
}
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