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ehci clean up

This commit is contained in:
hathach 2018-12-11 17:05:56 +07:00
parent d05021009b
commit 364666c206
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GPG Key ID: 2FA891220FBFD581
2 changed files with 88 additions and 93 deletions
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144
src/host/ehci/ehci.c
View File

@ -64,16 +64,36 @@ CFG_TUSB_MEM_SECTION ATTR_ALIGNED(4096) static ehci_data_t ehci_data;
//------------- Validation -------------// //------------- Validation -------------//
// TODO static assert for memory placement on some known MCU such as lpc43xx // TODO static assert for memory placement on some known MCU such as lpc43xx
uint32_t hcd_ehci_register_addr(uint8_t rhport)
{
return (uint32_t) (rhport ? &LPC_USB1->USBCMD_H : &LPC_USB0->USBCMD_H );
}
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
// PROTOTYPE // PROTOTYPE
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
static inline ehci_registers_t* get_operational_register(uint8_t hostid) ATTR_PURE ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT; static inline ehci_link_t* get_period_head(uint8_t rhport, uint8_t interval_ms)
{
(uint8_t) rhport;
return (ehci_link_t*) &ehci_data.period_head_arr[ tu_log2( tu_min8(EHCI_FRAMELIST_SIZE, interval_ms) ) ];
}
static inline ehci_qhd_t* get_async_head(uint8_t hostid) ATTR_ALWAYS_INLINE ATTR_PURE ATTR_WARN_UNUSED_RESULT; static inline ehci_qhd_t* qhd_control(uint8_t dev_addr)
static inline ehci_link_t* get_period_head(uint8_t hostid, uint8_t interval_ms) ATTR_ALWAYS_INLINE ATTR_PURE ATTR_WARN_UNUSED_RESULT; {
return &ehci_data.control[dev_addr].qhd;
}
static inline ehci_qhd_t* qhd_async_head(uint8_t rhport)
{
(void) rhport;
return qhd_control(0); // control qhd of dev0 is used as async head
}
static inline ehci_qtd_t* qtd_control(uint8_t dev_addr)
{
return &ehci_data.control[dev_addr].qtd;
}
static inline ehci_qhd_t* get_control_qhd(uint8_t dev_addr) ATTR_ALWAYS_INLINE ATTR_PURE ATTR_WARN_UNUSED_RESULT;
static inline ehci_qtd_t* get_control_qtds(uint8_t dev_addr) ATTR_ALWAYS_INLINE ATTR_PURE ATTR_WARN_UNUSED_RESULT;
static inline ehci_qhd_t* qhd_next(ehci_qhd_t const * p_qhd) ATTR_ALWAYS_INLINE ATTR_PURE; static inline ehci_qhd_t* qhd_next(ehci_qhd_t const * p_qhd) ATTR_ALWAYS_INLINE ATTR_PURE;
static inline ehci_qhd_t* qhd_find_free (void); static inline ehci_qhd_t* qhd_find_free (void);
@ -98,12 +118,12 @@ static void qtd_init(ehci_qtd_t* p_qtd, uint32_t data_ptr, uint16_t total_bytes)
static inline void list_insert(ehci_link_t *current, ehci_link_t *new, uint8_t new_type) ATTR_ALWAYS_INLINE; static inline void list_insert(ehci_link_t *current, ehci_link_t *new, uint8_t new_type) ATTR_ALWAYS_INLINE;
static inline ehci_link_t* list_next(ehci_link_t *p_link_pointer) ATTR_PURE ATTR_ALWAYS_INLINE; static inline ehci_link_t* list_next(ehci_link_t *p_link_pointer) ATTR_PURE ATTR_ALWAYS_INLINE;
static ehci_link_t* list_find_previous_item(ehci_link_t* p_head, ehci_link_t* p_current); static ehci_link_t* list_find_previous_item(ehci_link_t* p_head, ehci_link_t* p_current);
static tusb_error_t list_remove_qhd(ehci_link_t* p_head, ehci_link_t* p_remove); static bool list_remove_qhd(ehci_link_t* p_head, ehci_link_t* p_remove);
static bool ehci_init(uint8_t hostid); static bool ehci_init(uint8_t hostid);
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
// USBH-HCD API // HCD API
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
bool hcd_init(void) bool hcd_init(void)
{ {
@ -111,9 +131,6 @@ bool hcd_init(void)
return ehci_init(TUH_OPT_RHPORT); return ehci_init(TUH_OPT_RHPORT);
} }
//--------------------------------------------------------------------+
// PORT API
//--------------------------------------------------------------------+
void hcd_port_reset(uint8_t hostid) void hcd_port_reset(uint8_t hostid)
{ {
ehci_registers_t* regs = ehci_data.regs; ehci_registers_t* regs = ehci_data.regs;
@ -138,12 +155,10 @@ void hcd_device_remove(uint8_t rhport, uint8_t dev_addr)
ehci_data.regs->command_bm.async_adv_doorbell = 1; // Async doorbell check EHCI 4.8.2 for operational details ehci_data.regs->command_bm.async_adv_doorbell = 1; // Async doorbell check EHCI 4.8.2 for operational details
} }
//--------------------------------------------------------------------+ // EHCI controller init
// Controller API
//--------------------------------------------------------------------+
static bool ehci_init(uint8_t hostid) static bool ehci_init(uint8_t hostid)
{ {
ehci_data.regs = get_operational_register(hostid); ehci_data.regs = (ehci_registers_t* ) hcd_ehci_register_addr(hostid);
ehci_registers_t* regs = ehci_data.regs; ehci_registers_t* regs = ehci_data.regs;
@ -152,16 +167,15 @@ static bool ehci_init(uint8_t hostid)
regs->inten = 0; // 1. disable all the interrupt regs->inten = 0; // 1. disable all the interrupt
regs->status = EHCI_INT_MASK_ALL; // 2. clear all status regs->status = EHCI_INT_MASK_ALL; // 2. clear all status
regs->inten = EHCI_INT_MASK_ERROR | EHCI_INT_MASK_PORT_CHANGE | regs->inten = EHCI_INT_MASK_ERROR | EHCI_INT_MASK_PORT_CHANGE | EHCI_INT_MASK_ASYNC_ADVANCE |
EHCI_INT_MASK_NXP_PERIODIC | EHCI_INT_MASK_NXP_PERIODIC | EHCI_INT_MASK_NXP_ASYNC ;
EHCI_INT_MASK_ASYNC_ADVANCE | EHCI_INT_MASK_NXP_ASYNC;
//------------- Asynchronous List -------------// //------------- Asynchronous List -------------//
ehci_qhd_t * const async_head = get_async_head(hostid); ehci_qhd_t * const async_head = qhd_async_head(hostid);
tu_memclr(async_head, sizeof(ehci_qhd_t)); tu_memclr(async_head, sizeof(ehci_qhd_t));
async_head->next.address = (uint32_t) async_head; // circular list, next is itself async_head->next.address = (uint32_t) async_head; // circular list, next is itself
async_head->next.type = EHCI_QUEUE_ELEMENT_QHD; async_head->next.type = EHCI_QTYPE_QHD;
async_head->head_list_flag = 1; async_head->head_list_flag = 1;
async_head->qtd_overlay.halted = 1; // inactive most of time async_head->qtd_overlay.halted = 1; // inactive most of time
async_head->qtd_overlay.next.terminate = 1; // TODO removed if verified async_head->qtd_overlay.next.terminate = 1; // TODO removed if verified
@ -188,20 +202,20 @@ static bool ehci_init(uint8_t hostid)
for(uint32_t i=0; i<EHCI_FRAMELIST_SIZE; i++) for(uint32_t i=0; i<EHCI_FRAMELIST_SIZE; i++)
{ {
framelist[i].address = (uint32_t) period_1ms; framelist[i].address = (uint32_t) period_1ms;
framelist[i].type = EHCI_QUEUE_ELEMENT_QHD; framelist[i].type = EHCI_QTYPE_QHD;
} }
for(uint32_t i=0; i<EHCI_FRAMELIST_SIZE; i+=2) for(uint32_t i=0; i<EHCI_FRAMELIST_SIZE; i+=2)
{ {
list_insert(framelist + i, get_period_head(hostid, 2), EHCI_QUEUE_ELEMENT_QHD); list_insert(framelist + i, get_period_head(hostid, 2), EHCI_QTYPE_QHD);
} }
for(uint32_t i=1; i<EHCI_FRAMELIST_SIZE; i+=4) for(uint32_t i=1; i<EHCI_FRAMELIST_SIZE; i+=4)
{ {
list_insert(framelist + i, get_period_head(hostid, 4), EHCI_QUEUE_ELEMENT_QHD); list_insert(framelist + i, get_period_head(hostid, 4), EHCI_QTYPE_QHD);
} }
list_insert(framelist+3, get_period_head(hostid, 8), EHCI_QUEUE_ELEMENT_QHD); list_insert(framelist+3, get_period_head(hostid, 8), EHCI_QTYPE_QHD);
period_1ms->terminate = 1; period_1ms->terminate = 1;
@ -241,13 +255,13 @@ static tusb_error_t hcd_controller_stop(uint8_t hostid)
bool hcd_pipe_control_close(uint8_t dev_addr) bool hcd_pipe_control_close(uint8_t dev_addr)
{ {
//------------- TODO pipe handle validate -------------// //------------- TODO pipe handle validate -------------//
ehci_qhd_t * const p_qhd = get_control_qhd(dev_addr); ehci_qhd_t* p_qhd = qhd_control(dev_addr);
p_qhd->is_removing = 1; p_qhd->is_removing = 1;
if (dev_addr != 0) if (dev_addr != 0)
{ {
TU_ASSERT_ERR( list_remove_qhd( (ehci_link_t*) get_async_head( _usbh_devices[dev_addr].rhport ), TU_ASSERT( list_remove_qhd( (ehci_link_t*) qhd_async_head( _usbh_devices[dev_addr].rhport ),
(ehci_link_t*) p_qhd) ); (ehci_link_t*) p_qhd) );
} }
@ -268,8 +282,8 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
// FIXME control only for now // FIXME control only for now
if ( epnum == 0 ) if ( epnum == 0 )
{ {
ehci_qhd_t* qhd = get_control_qhd(dev_addr); ehci_qhd_t* qhd = qhd_control(dev_addr);
ehci_qtd_t* qtd = get_control_qtds(dev_addr); ehci_qtd_t* qtd = qtd_control(dev_addr);
qtd_init(qtd, (uint32_t) buffer, buflen); qtd_init(qtd, (uint32_t) buffer, buflen);
@ -292,8 +306,8 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet[8]) bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet[8])
{ {
ehci_qhd_t * const p_qhd = get_control_qhd(dev_addr); ehci_qhd_t* p_qhd = qhd_control(dev_addr);
ehci_qtd_t *p_setup = get_control_qtds(dev_addr); ehci_qtd_t* p_setup = qtd_control(dev_addr);
qtd_init(p_setup, (uint32_t) setup_packet, 8); qtd_init(p_setup, (uint32_t) setup_packet, 8);
p_setup->pid = EHCI_PID_SETUP; p_setup->pid = EHCI_PID_SETUP;
@ -323,7 +337,7 @@ bool hcd_edpt_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_endpoint_t const
if ( ep_desc->bEndpointAddress == 0 ) if ( ep_desc->bEndpointAddress == 0 )
{ {
p_qhd = get_control_qhd(dev_addr); p_qhd = qhd_control(dev_addr);
}else }else
{ {
p_qhd = qhd_find_free(); p_qhd = qhd_find_free();
@ -342,7 +356,7 @@ bool hcd_edpt_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_endpoint_t const
{ {
case TUSB_XFER_CONTROL: case TUSB_XFER_CONTROL:
case TUSB_XFER_BULK: case TUSB_XFER_BULK:
list_head = (ehci_link_t*) get_async_head(_usbh_devices[dev_addr].rhport); list_head = (ehci_link_t*) qhd_async_head(_usbh_devices[dev_addr].rhport);
break; break;
case TUSB_XFER_INTERRUPT: case TUSB_XFER_INTERRUPT:
@ -357,7 +371,7 @@ bool hcd_edpt_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_endpoint_t const
} }
// TODO might need to disable async/period list // TODO might need to disable async/period list
list_insert( list_head, (ehci_link_t*) p_qhd, EHCI_QUEUE_ELEMENT_QHD); list_insert( list_head, (ehci_link_t*) p_qhd, EHCI_QTYPE_QHD);
return true; return true;
} }
@ -404,16 +418,15 @@ bool hcd_pipe_close(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr)
// period list queue element is guarantee to be free in the next frame (1 ms) // period list queue element is guarantee to be free in the next frame (1 ms)
p_qhd->is_removing = 1; // TODO redundant, only apply to control queue head p_qhd->is_removing = 1; // TODO redundant, only apply to control queue head
if ( p_qhd->xfer_type == TUSB_XFER_BULK ) if ( p_qhd->int_smask == 0 )
{ {
TU_ASSERT_ERR( list_remove_qhd( // Async list
(ehci_link_t*) get_async_head( _usbh_devices[dev_addr].rhport ), TU_ASSERT( list_remove_qhd( (ehci_link_t*) qhd_async_head( _usbh_devices[dev_addr].rhport ),
(ehci_link_t*) p_qhd), false ); (ehci_link_t*) p_qhd), false );
} }
else else
{ {
TU_ASSERT_ERR( list_remove_qhd( TU_ASSERT( list_remove_qhd( get_period_head( _usbh_devices[dev_addr].rhport, p_qhd->interval_ms ),
get_period_head( _usbh_devices[dev_addr].rhport, p_qhd->interval_ms ),
(ehci_link_t*) p_qhd), false ); (ehci_link_t*) p_qhd), false );
} }
@ -461,7 +474,8 @@ static void async_advance_isr(ehci_qhd_t * const async_head)
for(uint8_t dev_addr=1; dev_addr < CFG_TUSB_HOST_DEVICE_MAX; dev_addr++) for(uint8_t dev_addr=1; dev_addr < CFG_TUSB_HOST_DEVICE_MAX; dev_addr++)
{ {
// check if control endpoint is removing // check if control endpoint is removing
ehci_qhd_t *p_control_qhd = get_control_qhd(dev_addr); ehci_qhd_t *p_control_qhd = qhd_control(dev_addr);
if ( p_control_qhd->is_removing ) if ( p_control_qhd->is_removing )
{ {
p_control_qhd->is_removing = 0; p_control_qhd->is_removing = 0;
@ -552,7 +566,7 @@ static void period_list_xfer_complete_isr(uint8_t hostid, uint8_t interval_ms)
{ {
switch ( next_item.type ) switch ( next_item.type )
{ {
case EHCI_QUEUE_ELEMENT_QHD: case EHCI_QTYPE_QHD:
{ {
ehci_qhd_t *p_qhd_int = (ehci_qhd_t *) tu_align32(next_item.address); ehci_qhd_t *p_qhd_int = (ehci_qhd_t *) tu_align32(next_item.address);
if ( !p_qhd_int->qtd_overlay.halted ) if ( !p_qhd_int->qtd_overlay.halted )
@ -562,9 +576,9 @@ static void period_list_xfer_complete_isr(uint8_t hostid, uint8_t interval_ms)
} }
break; break;
case EHCI_QUEUE_ELEMENT_ITD: // TODO support hs/fs ISO case EHCI_QTYPE_ITD: // TODO support hs/fs ISO
case EHCI_QUEUE_ELEMENT_SITD: case EHCI_QTYPE_SITD:
case EHCI_QUEUE_ELEMENT_FSTN: case EHCI_QTYPE_FSTN:
default: break; default: break;
} }
@ -602,7 +616,7 @@ static void qhd_xfer_error_isr(ehci_qhd_t * p_qhd)
p_qhd->qtd_overlay.alternate.terminate = 1; p_qhd->qtd_overlay.alternate.terminate = 1;
p_qhd->qtd_overlay.halted = 0; p_qhd->qtd_overlay.halted = 0;
ehci_qtd_t *p_setup = get_control_qtds(p_qhd->dev_addr); ehci_qtd_t *p_setup = qtd_control(p_qhd->dev_addr);
p_setup->used = 0; p_setup->used = 0;
} }
@ -617,7 +631,7 @@ static void xfer_error_isr(uint8_t hostid)
{ {
//------------- async list -------------// //------------- async list -------------//
uint8_t max_loop = 0; uint8_t max_loop = 0;
ehci_qhd_t * const async_head = get_async_head(hostid); ehci_qhd_t * const async_head = qhd_async_head(hostid);
ehci_qhd_t *p_qhd = async_head; ehci_qhd_t *p_qhd = async_head;
do do
{ {
@ -640,7 +654,7 @@ static void xfer_error_isr(uint8_t hostid)
{ {
switch ( next_item.type ) switch ( next_item.type )
{ {
case EHCI_QUEUE_ELEMENT_QHD: case EHCI_QTYPE_QHD:
{ {
ehci_qhd_t *p_qhd_int = (ehci_qhd_t *) tu_align32(next_item.address); ehci_qhd_t *p_qhd_int = (ehci_qhd_t *) tu_align32(next_item.address);
qhd_xfer_error_isr(p_qhd_int); qhd_xfer_error_isr(p_qhd_int);
@ -648,9 +662,9 @@ static void xfer_error_isr(uint8_t hostid)
break; break;
// TODO support hs/fs ISO // TODO support hs/fs ISO
case EHCI_QUEUE_ELEMENT_ITD: case EHCI_QTYPE_ITD:
case EHCI_QUEUE_ELEMENT_SITD: case EHCI_QTYPE_SITD:
case EHCI_QUEUE_ELEMENT_FSTN: case EHCI_QTYPE_FSTN:
default: break; default: break;
} }
@ -692,7 +706,7 @@ void hal_hcd_isr(uint8_t hostid)
//------------- some QTD/SITD/ITD with IOC set is completed -------------// //------------- some QTD/SITD/ITD with IOC set is completed -------------//
if (int_status & EHCI_INT_MASK_NXP_ASYNC) if (int_status & EHCI_INT_MASK_NXP_ASYNC)
{ {
async_list_xfer_complete_isr( get_async_head(hostid) ); async_list_xfer_complete_isr( qhd_async_head(hostid) );
} }
if (int_status & EHCI_INT_MASK_NXP_PERIODIC) if (int_status & EHCI_INT_MASK_NXP_PERIODIC)
@ -706,37 +720,18 @@ void hal_hcd_isr(uint8_t hostid)
//------------- There is some removed async previously -------------// //------------- There is some removed async previously -------------//
if (int_status & EHCI_INT_MASK_ASYNC_ADVANCE) // need to place after EHCI_INT_MASK_NXP_ASYNC if (int_status & EHCI_INT_MASK_ASYNC_ADVANCE) // need to place after EHCI_INT_MASK_NXP_ASYNC
{ {
async_advance_isr( get_async_head(hostid) ); async_advance_isr( qhd_async_head(hostid) );
} }
} }
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
// HELPER // HELPER
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
static inline ehci_registers_t* get_operational_register(uint8_t hostid)
{
return (ehci_registers_t*) (hostid ? (&LPC_USB1->USBCMD_H) : (&LPC_USB0->USBCMD_H) );
}
//------------- queue head helper -------------// //------------- queue head helper -------------//
static inline ehci_qhd_t* get_async_head(uint8_t hostid)
{
return get_control_qhd(0);
}
static inline ehci_link_t* get_period_head(uint8_t hostid, uint8_t interval_ms)
{
return (ehci_link_t*) &ehci_data.period_head_arr[ tu_log2( tu_min8(EHCI_FRAMELIST_SIZE, interval_ms) ) ];
}
static inline ehci_qhd_t* get_control_qhd(uint8_t dev_addr)
{
return &ehci_data.control[dev_addr].qhd;
}
static inline ehci_qtd_t* get_control_qtds(uint8_t dev_addr)
{
return &ehci_data.control[dev_addr].qtd;
}
static inline ehci_qhd_t* qhd_find_free (void) static inline ehci_qhd_t* qhd_find_free (void)
{ {
@ -875,7 +870,6 @@ static void qhd_init(ehci_qhd_t *p_qhd, uint8_t dev_addr, tusb_desc_endpoint_t c
p_qhd->p_qtd_list_head = NULL; p_qhd->p_qtd_list_head = NULL;
p_qhd->p_qtd_list_tail = NULL; p_qhd->p_qtd_list_tail = NULL;
p_qhd->pid_non_control = edpt_dir(ep_desc->bEndpointAddress) ? EHCI_PID_IN : EHCI_PID_OUT; // PID for TD under this endpoint p_qhd->pid_non_control = edpt_dir(ep_desc->bEndpointAddress) ? EHCI_PID_IN : EHCI_PID_OUT; // PID for TD under this endpoint
p_qhd->xfer_type = xfer_type;
//------------- active, but no TD list -------------// //------------- active, but no TD list -------------//
p_qhd->qtd_overlay.halted = 0; p_qhd->qtd_overlay.halted = 0;
@ -936,17 +930,17 @@ static ehci_link_t* list_find_previous_item(ehci_link_t* p_head, ehci_link_t* p_
return (tu_align32(p_prev->address) != (uint32_t) p_head) ? p_prev : NULL; return (tu_align32(p_prev->address) != (uint32_t) p_head) ? p_prev : NULL;
} }
static tusb_error_t list_remove_qhd(ehci_link_t* p_head, ehci_link_t* p_remove) static bool list_remove_qhd(ehci_link_t* p_head, ehci_link_t* p_remove)
{ {
ehci_link_t *p_prev = list_find_previous_item(p_head, p_remove); ehci_link_t *p_prev = list_find_previous_item(p_head, p_remove);
TU_ASSERT(p_prev, TUSB_ERROR_INVALID_PARA); TU_ASSERT(p_prev);
p_prev->address = p_remove->address; p_prev->address = p_remove->address;
// EHCI 4.8.2 link the removing queue head to async/period head (which always reachable by Host Controller) // EHCI 4.8.2 link the removing queue head to async/period head (which always reachable by Host Controller)
p_remove->address = ((uint32_t) p_head) | (EHCI_QUEUE_ELEMENT_QHD << 1); p_remove->address = ((uint32_t) p_head) | (EHCI_QTYPE_QHD << 1);
return TUSB_ERROR_NONE; return true;
} }
#endif #endif

21
src/host/ehci/ehci.h
View File

@ -81,15 +81,17 @@ TU_VERIFY_STATIC(EHCI_CFG_FRAMELIST_SIZE_BITS <= 7, "incorrect value");
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
// EHCI Data Structure // EHCI Data Structure
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
enum ehci_queue_element_type_{ enum
EHCI_QUEUE_ELEMENT_ITD = 0 , ///< 0 {
EHCI_QUEUE_ELEMENT_QHD , ///< 1 EHCI_QTYPE_ITD = 0 ,
EHCI_QUEUE_ELEMENT_SITD , ///< 2 EHCI_QTYPE_QHD ,
EHCI_QUEUE_ELEMENT_FSTN ///< 3 EHCI_QTYPE_SITD ,
EHCI_QTYPE_FSTN
}; };
/// EHCI PID /// EHCI PID
enum tusb_pid_{ enum
{
EHCI_PID_OUT = 0 , EHCI_PID_OUT = 0 ,
EHCI_PID_IN , EHCI_PID_IN ,
EHCI_PID_SETUP EHCI_PID_SETUP
@ -183,11 +185,10 @@ typedef struct ATTR_ALIGNED(32)
uint8_t used; uint8_t used;
uint8_t is_removing; uint8_t is_removing;
uint8_t pid_non_control; uint8_t pid_non_control;
uint8_t xfer_type; uint8_t interval_ms; // polling interval in frames (or milisecond)
uint16_t total_xferred_bytes; // number of bytes xferred until a qtd with ioc bit set uint16_t total_xferred_bytes; // number of bytes xferred until a qtd with ioc bit set
uint8_t interval_ms; // polling interval in frames (or milisecond) uint8_t reserved2[2];
uint8_t reserved2;
ehci_qtd_t * volatile p_qtd_list_head; // head of the scheduled TD list ehci_qtd_t * volatile p_qtd_list_head; // head of the scheduled TD list
ehci_qtd_t * volatile p_qtd_list_tail; // tail of the scheduled TD list ehci_qtd_t * volatile p_qtd_list_tail; // tail of the scheduled TD list
@ -444,7 +445,7 @@ typedef struct
// [0] : 1ms, [1] : 2ms, [2] : 4ms, [3] : 8 ms // [0] : 1ms, [1] : 2ms, [2] : 4ms, [3] : 8 ms
ehci_qhd_t period_head_arr[4]; ehci_qhd_t period_head_arr[4];
// Note control qhd of dev0 is used as head of async list, always exists // Note control qhd of dev0 is used as head of async list
struct { struct {
ehci_qhd_t qhd; ehci_qhd_t qhd;
ehci_qtd_t qtd; ehci_qtd_t qtd;