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Use interrupts & Device/Pipe/Transfer structs (still no data...)

main
PaulStoffregen 7 years ago
parent
c98ba51e6d
commit
afa91af357
2 changed files with 351 additions and 170 deletions
Split View Show Diff Stats
  1. +113
    -0
      host.h
  2. +238
    -170
      k66_usbhost.ino

+ 113
- 0
host.h View File

@@ -0,0 +1,113 @@
#include <stdint.h>


typedef struct Device_struct Device_t;
typedef struct Pipe_struct Pipe_t;
typedef struct Transfer_struct Transfer_t;

typedef union {
struct {
union {
struct {
uint8_t bmRequestType;
uint8_t bRequest;
};
uint16_t wRequestAndType;
};
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
};
struct {
uint32_t word1;
uint32_t word2;
};
} setup_t;


struct Device_struct {
Pipe_t *control_pipe;
Device_t *next;
setup_t setup;
uint8_t speed; // 0=12, 1=1.5, 2=480 Mbit/sec
uint8_t address;
uint8_t hub_address;
uint8_t hub_port;
};

struct Pipe_struct {
// Queue Head (QH), EHCI page 46-50
struct { // must be aligned to 32 byte boundary
uint32_t horizontal_link;
uint32_t capabilities[2];
uint32_t current;
uint32_t next;
uint32_t alt_next;
uint32_t token;
uint32_t buffer[5];
} qh;
Device_t *device;
uint8_t type; // 0=control, 1=isochronous, 2=bulk, 3=interrupt
uint8_t direction; // 0=out, 1=in
//uint8_t endpoint; // 0 to 15
//uint8_t data01; // next packet DATA0 or DATA1
uint8_t unusedbyte[2];
uint32_t unused[2];
};


struct Transfer_struct {
// Queue Element Transfer Descriptor (qTD), EHCI pg 40-45
struct { // must be aligned to 32 byte boundary
uint32_t next;
uint32_t alt_next;
uint32_t token;
uint32_t buffer[5];
} qtd;
Pipe_t *pipe;
void *callback;
void *callback_arg;
uint32_t unused[5];
};

#if 0
#define EHCI_QH_CAPABILITIES1( \
nak_count_reload, \
control_endpoint_flag, \
max_packet_length, \
head_of_list, \
data_toggle_control, \
speed, \
endpoint_number, \
inactivate, \
address) \
( ((nak_count_reload) << 28) | \
((control_endpoint_flag) << 27) | \
((max_packet_length) << 16) | \
((head_of_list) << 15) | \
((data_toggle_control) << 14) | \
((speed) << 12) | \
((endpoint_number) << 8) | \
((inactivate) << 7) | \
((address) << 0) )

#define EHCI_QH_CAPABILITIES2( \
high_bw_mult, \
hub_port_number, \
hub_address, \
split_completion_mask, \
interrupt_schedule_mask) \
( ((high_bw_mult) << 30) | \
((hub_port_number) << 23) | \
((hub_address) << 16) | \
((split_completion_mask) << 8) | \
((interrupt_schedule_mask) << 0) )
#endif

Device_t * allocate_Device(void);
void free_Device(Device_t *q);
Pipe_t * allocate_Pipe(void);
void free_Pipe(Pipe_t *q);
Transfer_t * allocate_Transfer(void);
void free_Transfer(Transfer_t *q);


+ 238
- 170
k66_usbhost.ino View File

@@ -1,20 +1,15 @@
// usb host experiments....

#include "host.h"

uint32_t periodictable[64] __attribute__ ((aligned(4096), used));
volatile uint32_t qh[12] __attribute__ ((aligned(64)));
uint32_t qtd_dummy[8] __attribute__ ((aligned(32)));
uint32_t qtd_setup[8] __attribute__ ((aligned(32)));
uint32_t qtd_in[8] __attribute__ ((aligned(32)));
uint32_t qtd_outack[8] __attribute__ ((aligned(32)));
uint32_t setupbuf[2] __attribute__ ((aligned(8)));
uint32_t inbuf[16] __attribute__ ((aligned(64)));
uint32_t periodictable[32] __attribute__ ((aligned(4096), used));
uint8_t port_state;
#define PORT_STATE_DISCONNECTED 0
#define PORT_STATE_DEBOUNCE 1
#define PORT_STATE_RESET 2
#define PORT_STATE_RECOVERY 3
#define PORT_STATE_ACTIVE 4
Device_t *rootdev=NULL;

void setup()
{
@@ -28,8 +23,14 @@ void setup()
GPIOE_PDDR |= (1<<6);
GPIOE_PSOR = (1<<6); // turn on USB host power
while (!Serial) ; // wait
print("USB Host Testing");
print_mpu();
Serial.println("USB Host Testing");
Serial.print("sizeof Device = ");
Serial.println(sizeof(Device_t));
Serial.print("sizeof Pipe = ");
Serial.println(sizeof(Pipe_t));
Serial.print("sizeof Transfer = ");
Serial.println(sizeof(Transfer_t));

MPU_RGDAAC0 |= 0x30000000;
MCG_C1 |= MCG_C1_IRCLKEN; // enable MCGIRCLK 32kHz
OSC0_CR |= OSC_ERCLKEN;
@@ -75,29 +76,9 @@ void setup()
}
print(" reset waited ", count);

for (int i=0; i < 64; i++) {
for (int i=0; i < 32; i++) {
periodictable[i] = 1;
}
qh[0] = ((uint32_t)qh) | 2;
qh[1] = 0x0040E000; // addr=0, ep=0
qh[2] = 0x40000000;
qh[3] = 0;
qh[4] = 1;
qh[5] = 1;
qh[6] = 0x40;
qh[7] = 0;
qh[8] = 0;
qh[9] = 0;
qh[10] = 0;
qh[11] = 0;
qtd_dummy[0] = 1;
qtd_dummy[1] = 1;
qtd_dummy[2] = 0x40; // 0x40 = halted
qtd_dummy[3] = 0;
qtd_dummy[4] = 0;
qtd_dummy[5] = 0;
qtd_dummy[6] = 0;
qtd_dummy[7] = 0;
port_state = PORT_STATE_DISCONNECTED;

// turn on the USBHS controller
@@ -105,11 +86,9 @@ void setup()
USBHS_USBINTR = 0;
USBHS_PERIODICLISTBASE = (uint32_t)periodictable;
USBHS_FRINDEX = 0;
USBHS_ASYNCLISTADDR = (uint32_t)qh;
USBHS_ASYNCLISTADDR = 0;
USBHS_USBCMD = USBHS_USBCMD_ITC(0) | USBHS_USBCMD_RS | USBHS_USBCMD_ASP(3) |
USBHS_USBCMD_FS2 | USBHS_USBCMD_FS(0) | // periodic table is 64 pointers
// USBHS_USBCMD_PSE |
USBHS_USBCMD_ASE;
USBHS_USBCMD_FS2 | USBHS_USBCMD_FS(1); // periodic table is 32 pointers

//USBHS_PORTSC1 = USBHS_PORTSC_PP;
USBHS_PORTSC1 |= USBHS_PORTSC_PP;
@@ -131,6 +110,11 @@ void setup()
digitalWrite(32, HIGH); // connect device
}

void loop()
{
}


void pulse(int usec)
{
// connect oscilloscope to see these pulses....
@@ -157,7 +141,7 @@ void pulse(int usec)
// PORT_STATE_RECOVERY 3
// PORT_STATE_ACTIVE 4

void usbhs_isr(void) // USBHS_ISR_HOST
void usbhs_isr(void)
{
uint32_t stat = USBHS_USBSTS;
USBHS_USBSTS = stat; // clear pending interrupts
@@ -202,13 +186,11 @@ void usbhs_isr(void) // USBHS_ISR_HOST
// 10 ms reset recover (USB 2.0: TRSTRCY, page 151 & 188)
USBHS_GPTIMER0LD = 10000; // microseconds
USBHS_GPTIMER0CTL = USBHS_GPTIMERCTL_RST | USBHS_GPTIMERCTL_RUN;

}
if (portstat & USBHS_PORTSC_FPR) {
Serial.println(" force resume");

}

pulse(1);
}
if (stat & USBHS_USBSTS_TI0) { // timer 0
@@ -222,162 +204,214 @@ void usbhs_isr(void) // USBHS_ISR_HOST
port_state = PORT_STATE_ACTIVE;
Serial.println(" end recovery");

// HCSPARAMS TTCTRL page 1671
rootdev = new_Device((USBHS_PORTSC1 >> 26) & 3, 0, 0);
}
}

}




void port_status()
Device_t * new_Device(uint32_t speed, uint32_t hub_addr, uint32_t hub_port)
{
uint32_t n;

Serial.print("Port: ");
n = USBHS_PORTSC1;
if (n & USBHS_PORTSC_PR) {
Serial.print("reset ");
}
if (n & USBHS_PORTSC_PP) {
Serial.print("on ");
} else {
Serial.print("off ");
}
if (n & USBHS_PORTSC_PHCD) {
Serial.print("phyoff ");
}
if (n & USBHS_PORTSC_PE) {
if (n & USBHS_PORTSC_SUSP) {
Serial.print("suspend ");
} else {
Serial.print("enable ");
}
} else {
Serial.print("disable ");
Device_t *dev;

Serial.print("new_Device: ");
switch (speed) {
case 0: Serial.print("12"); break;
case 1: Serial.print("1.5"); break;
case 2: Serial.print("480"); break;
default: Serial.print("??");
}
Serial.print("speed=");
switch ((n >> 26) & 3) {
case 0: Serial.print("12 Mbps "); break;
case 1: Serial.print("1.5 Mbps "); break;
case 2: Serial.print("480 Mbps "); break;
default: Serial.print("(undef) ");
Serial.println(" Mbit/sec");
dev = allocate_Device();
if (!dev) return NULL;
dev->speed = speed;
dev->address = 1; // TODO: dynamic assign address
dev->hub_address = hub_addr;
dev->hub_port = hub_port;
dev->control_pipe = new_Pipe(dev, 0, 0, 0, 8);
if (!dev->control_pipe) {
free_Device(dev);
return NULL;
}
if (n & USBHS_PORTSC_HSP) {
Serial.print("highspeed ");
}
if (n & USBHS_PORTSC_OCA) {
Serial.print("overcurrent ");
}
if (n & USBHS_PORTSC_CCS) {
Serial.print("connected ");
} else {
Serial.print("not-connected ");
}
// print info about the EHCI status
Serial.print(" run=");
Serial.print(USBHS_USBCMD & 1); // running mode
Serial.print(",halt=");
Serial.print((USBHS_USBSTS >> 12) & 1); // halted mode
Serial.print(",err=");
Serial.print((USBHS_USBSTS >> 4) & 1); // error encountered!
Serial.print(",asyn=");
Serial.print((USBHS_USBSTS >> 15) & 1); // running the async schedule
Serial.print(",per=");
Serial.print((USBHS_USBSTS >> 14) & 1); // running the periodic schedule
Serial.print(",index=");
Serial.print(USBHS_FRINDEX); // periodic index

Serial.println();
if (USBHS_USBSTS & 16) {
print_mpu();
USBHS_USBSTS = 16; // clear error
}
static uint8_t buffer[8];
dev->control_pipe->direction = 1; // 1=IN
dev->setup.bmRequestType = 0x80;
dev->setup.bRequest = 0x06; // 6=GET_DESCRIPTOR
dev->setup.wValue = 0x0100;
dev->setup.wIndex = 0x0000;
dev->setup.wLength = 8;
Transfer_t *transfer = new_Transfer(dev->control_pipe, buffer, 8);
if (transfer) queue_Transfer(transfer);

return dev;
}


void read_descriptor(uint16_t value, uint16_t index, uint32_t len)
static uint32_t QH_capabilities1(uint32_t nak_count_reload, uint32_t control_endpoint_flag,
uint32_t max_packet_length, uint32_t head_of_list, uint32_t data_toggle_control,
uint32_t speed, uint32_t endpoint_number, uint32_t inactivate, uint32_t address)
{
uint32_t token;

if (len > 512) len = 512;
Serial.println("Read Device Descriptor...");

qtd_setup[0] = (uint32_t)qtd_in;
qtd_setup[1] = 1;
qtd_setup[2] = 0x00080E80;
qtd_setup[3] = (uint32_t)setupbuf;

setupbuf[0] = (value << 16) | (0x06 << 8) | 0x80;
setupbuf[1] = (len << 16) | index;

qtd_in[0] = (uint32_t)qtd_outack;
qtd_in[1] = 1;
qtd_in[2] = 0x80000000 | (len << 16) | 0x0D80;
qtd_in[3] = (uint32_t)inbuf;

qtd_outack[0] = 1;
qtd_outack[1] = 1;
qtd_outack[2] = 0x80400C80;
qtd_outack[3] = 0;
return ( (nak_count_reload << 28) | (control_endpoint_flag << 27) |
(max_packet_length << 16) | (head_of_list << 15) |
(data_toggle_control << 14) | (speed << 12) | (endpoint_number << 8) |
(inactivate << 7) | (address << 0) );
}

// add to QH
static uint32_t QH_capabilities2(uint32_t high_bw_mult, uint32_t hub_port_number,
uint32_t hub_address, uint32_t split_completion_mask, uint32_t interrupt_schedule_mask)
{
return ( (high_bw_mult << 30) | (hub_port_number << 23) | (hub_address << 16) |
(split_completion_mask << 8) | (interrupt_schedule_mask << 0) );
}

// Save the content of the token field of the first qTD to be added
token = qtd_setup[2];

// Change the token of the first qTD so its Halted bit is set as 1
// and all other bits are zero
qtd_setup[2] = 0x40;

// copy the content of the first qTD to the dummy qTD
memcpy(qtd_dummy, qtd_setup, 32);
Pipe_t * new_Pipe(Device_t *dev, uint32_t type, uint32_t endpoint, uint32_t direction,
uint32_t max_packet_len)
{
Pipe_t *pipe;
uint32_t c=0, dtc=0;

Serial.println("new_Pipe");
pipe = allocate_Pipe();
if (!pipe) return NULL;
pipe->qh.current = 0;
pipe->qh.next = 1;
pipe->qh.alt_next = 1;
pipe->qh.token = 0;
pipe->qh.buffer[0] = 0;
pipe->qh.buffer[1] = 0;
pipe->qh.buffer[2] = 0;
pipe->qh.buffer[3] = 0;
pipe->qh.buffer[4] = 0;
if (pipe->type == 0) {
// control
if (dev->speed < 2) c = 1;
dtc = 1;
} else if (pipe->type == 2) {
// bulk
} else if (pipe->type == 3) {
// interrupt
}
pipe->qh.capabilities[0] = QH_capabilities1(15, c, max_packet_len, 0,
dtc, dev->speed, endpoint, 0, dev->address);
pipe->qh.capabilities[1] = QH_capabilities2(1, dev->hub_port,
dev->hub_address, 0, 0);
if (pipe->type == 0 || pipe->type == 2) {
// control or bulk: add to async queue
Pipe_t *list = (Pipe_t *)USBHS_ASYNCLISTADDR;
if (list == NULL) {
pipe->qh.capabilities[0] |= 0x8000; // H bit
pipe->qh.horizontal_link = (uint32_t)&(pipe->qh) | 2; // 2=QH
USBHS_ASYNCLISTADDR = (uint32_t)&(pipe->qh);
USBHS_USBCMD |= USBHS_USBCMD_ASE; // enable async schedule
Serial.println(" first in async list");
} else {
// EHCI 1.0: section 4.8.1, page 72
pipe->qh.horizontal_link = list->qh.horizontal_link;
list->qh.horizontal_link = (uint32_t)&(pipe->qh) | 2;
Serial.println(" added to async list");
}
} else if (pipe->type == 3) {
// interrupt: add to periodic schedule
// TODO: link it into the periodic table
}
return pipe;
}

// Link the first qTD to the last of the qTD of the newly qTD list
qtd_outack[0] = (uint32_t)qtd_setup;

// Restore the token value to the previous dummy qTD's oken field
qtd_dummy[2] = token;
// qtd_setup becomes the dummy token... so this only works once!

delay(1);
Serial.println(qtd_dummy[2], HEX);
Serial.println(qtd_in[2], HEX);
Serial.println(qtd_outack[2], HEX);
Serial.println(qtd_setup[2], HEX);
// Fill in the qTD fields (token & data)
// t the Transfer qTD to initialize
// buf data to transfer
// len length of data
// pid type of packet: 0=OUT, 1=IN, 2=SETUP
// data01 value of DATA0/DATA1 toggle on 1st packet
// irq whether to generate an interrupt when transfer complete
//
void init_qTD(volatile Transfer_t *t, void *buf, uint32_t len,
uint32_t pid, uint32_t data01, bool irq)
{
t->qtd.alt_next = 1; // 1=terminate
if (data01) data01 = 0x80000000;
t->qtd.token = data01 | (len << 16) | (irq ? 0x8000 : 0) | (pid << 8);
uint32_t addr = (uint32_t)buf;
t->qtd.buffer[0] = addr;
addr &= 0xFFFFF000;
t->qtd.buffer[1] = addr + 0x1000;
t->qtd.buffer[2] = addr + 0x2000;
t->qtd.buffer[3] = addr + 0x3000;
t->qtd.buffer[4] = addr + 0x4000;
}

// Create a list of Transfers
//
Transfer_t * new_Transfer(Pipe_t *pipe, void *buffer, uint32_t len)
{
Serial.println("new_Transfer");
Transfer_t *transfer = allocate_Transfer();
if (!transfer) return NULL;
transfer->pipe = pipe;
if (pipe->type == 0) {
// control transfer
Transfer_t *data, *status;
uint32_t status_direction;
if (len > 16384) {
free_Transfer(transfer);
return NULL;
}
status = allocate_Transfer();
if (!status) {
free_Transfer(transfer);
return NULL;
}
if (len > 0) {
data = allocate_Transfer();
if (!data) {
free_Transfer(transfer);
free_Transfer(status);
return NULL;
}
init_qTD(data, buffer, len, pipe->direction, 1, false);
transfer->qtd.next = (uint32_t)data;
data->qtd.next = (uint32_t)status;
data->pipe = pipe;
status_direction = pipe->direction ^ 1;
} else {
transfer->qtd.next = (uint32_t)status;
status_direction = 1; // always IN, USB 2.0 page 226
}
init_qTD(transfer, &(pipe->device->setup), 8, 2, 0, false);
init_qTD(status, NULL, 0, status_direction, 1, true);
status->pipe = pipe;
status->qtd.next = 1;
} else {
// bulk, interrupt or isochronous transfer
free_Transfer(transfer);
return NULL;
}
return transfer;
}


void loop()
void queue_Transfer(Transfer_t *transfer)
{
/*
static unsigned int count=0;

port_status();
delay(1);
count++;
if (count == 2) {
Serial.println("Plug in device...");
digitalWrite(32, HIGH); // connect device
}
if (count == 5) {
Serial.println("Initiate Reset Sequence...");
USBHS_PORTSC1 |= USBHS_PORTSC_PR;
}
if (count == 15) {
Serial.println("End Reset Sequence...");
USBHS_PORTSC1 &= ~USBHS_PORTSC_PR;
}
if (count == 22) {
read_descriptor(1, 0, 8); // device descriptor
}
if (count > 500) {
while (1) ; // stop here
Serial.println("queue_Transfer");
Pipe_t *pipe = transfer->pipe;
Transfer_t *last = (Transfer_t *)(pipe->qh.next);
if ((uint32_t)last & 1) {
pipe->qh.next = (uint32_t)transfer;
Serial.println(" first on QH");
} else {
while ((last->qtd.next & 1) == 0) last = (Transfer_t *)(last->qtd.next);
last->qtd.next = (uint32_t)transfer;
Serial.println(" added to qTD list");
}
*/
}



void print(const char *s)
{
Serial.println(s);
@@ -391,8 +425,42 @@ void print(const char *s, int num)
delay(10);
}

void print_mpu()

// Memory allocation... for now, just simplest leaky way to get started

Device_t * allocate_Device(void)
{
static Device_t mem[3];
static size_t count=0;
if (count >= sizeof(mem)/sizeof(Device_t)) return NULL;
return &mem[count++];
}

void free_Device(Device_t *q)
{
Serial.print("MPU: CESR=");
Serial.println(MPU_CESR, HEX);
}

Pipe_t * allocate_Pipe(void)
{
static Pipe_t mem[6] __attribute__ ((aligned(64)));
static size_t count=0;
if (count >= sizeof(mem)/sizeof(Pipe_t)) return NULL;
return &mem[count++];
}

void free_Pipe(Pipe_t *q)
{
}

Transfer_t * allocate_Transfer(void)
{
static Transfer_t mem[22] __attribute__ ((aligned(64)));
static size_t count=0;
if (count >= sizeof(mem)/sizeof(Transfer_t)) return NULL;
return &mem[count++];
}

void free_Transfer(Transfer_t *q)
{
}


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