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pigweed / third_party / github / zephyrproject-rtos / zephyr / f8d62756b0469732628cad1f20681b2af992f123 / . / drivers / usb / device / usb_dc_smartbond.c
blob: 96d227d887c3dd398c92dd89fdcda16f3b83d03e [file] [log] [blame]
/*
* Copyright (c) 2022 Renesas Electronics Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file usb_dc_smartbond.c
* @brief SmartBond USB device controller driver
*
*/
#include <stdio.h>
#include <string.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/drivers/usb/usb_dc.h>
#include <zephyr/kernel.h>
#include <zephyr/usb/usb_device.h>
#include <DA1469xAB.h>
#include <soc.h>
#include <da1469x_clock.h>
#include <zephyr/logging/log.h>
#include <zephyr/drivers/gpio.h>
LOG_MODULE_REGISTER(usb_dc_smartbond, CONFIG_USB_DRIVER_LOG_LEVEL);
/* USB device controller access from devicetree */
#define DT_DRV_COMPAT renesas_smartbond_usbd
#define USB_IRQ DT_INST_IRQ_BY_IDX(0, 0, irq)
#define USB_IRQ_PRI DT_INST_IRQ_BY_IDX(0, 0, priority)
#define VBUS_IRQ DT_INST_IRQ_BY_IDX(0, 1, irq)
#define VBUS_IRQ_PRI DT_INST_IRQ_BY_IDX(0, 1, priority)
#define DMA_CHANNEL_RX DT_INST_PROP(0, dma_chan_rx)
#define DMA_CHANNEL_TX DT_INST_PROP(0, dma_chan_tx)
/* Minimal transfer size needed to use DMA. For short transfers
* it may be simpler to just fill hardware FIFO with data instead
* of programming DMA registers.
*/
#define DMA_MIN_TRANSFER_SIZE DT_INST_PROP(0, dma_min_transfer_size)
#define FIFO_READ_THRESHOLD DT_INST_PROP(0, fifo_read_threshold)
/* Size of hardware RX and TX FIFO. */
#define EP0_FIFO_SIZE 8
#define EP_FIFO_SIZE 64
#define EP0_OUT_BUF_SIZE EP0_FIFO_SIZE
#define EP1_OUT_BUF_SIZE DT_INST_PROP_BY_IDX(0, ep_out_buf_size, 1)
#define EP2_OUT_BUF_SIZE DT_INST_PROP_BY_IDX(0, ep_out_buf_size, 2)
#define EP3_OUT_BUF_SIZE DT_INST_PROP_BY_IDX(0, ep_out_buf_size, 3)
#define EP0_IDX 0
#define EP0_IN USB_CONTROL_EP_IN
#define EP0_OUT USB_CONTROL_EP_OUT
#define EP_MAX 4
/* EP OUT buffers */
static uint8_t ep0_out_buf[EP0_OUT_BUF_SIZE];
static uint8_t ep1_out_buf[EP1_OUT_BUF_SIZE];
static uint8_t ep2_out_buf[EP2_OUT_BUF_SIZE];
static uint8_t ep3_out_buf[EP3_OUT_BUF_SIZE];
static uint8_t *const ep_out_bufs[4] = {
ep0_out_buf, ep1_out_buf, ep2_out_buf, ep3_out_buf,
};
static const uint16_t ep_out_buf_size[4] = {
EP0_OUT_BUF_SIZE, EP1_OUT_BUF_SIZE, EP2_OUT_BUF_SIZE, EP3_OUT_BUF_SIZE,
};
/* Node functional states */
#define NFSR_NODE_RESET 0
#define NFSR_NODE_RESUME 1
#define NFSR_NODE_OPERATIONAL 2
#define NFSR_NODE_SUSPEND 3
/*
* Those two following states are added to allow going out of sleep mode
* using frame interrupt. On remove wakeup RESUME state must be kept for
* at least 1ms. It is accomplished by using FRAME interrupt that goes
* through those two fake states before entering OPERATIONAL state.
*/
#define NFSR_NODE_WAKING (0x10 | (NFSR_NODE_RESUME))
#define NFSR_NODE_WAKING2 (0x20 | (NFSR_NODE_RESUME))
struct smartbond_ep_reg_set {
volatile uint32_t epc_in;
volatile uint32_t txd;
volatile uint32_t txs;
volatile uint32_t txc;
volatile uint32_t epc_out;
volatile uint32_t rxd;
volatile uint32_t rxs;
volatile uint32_t rxc;
};
static struct smartbond_ep_reg_set *const reg_sets[4] = {
(struct smartbond_ep_reg_set *)&USB->USB_EPC0_REG,
(struct smartbond_ep_reg_set *)&USB->USB_EPC1_REG,
(struct smartbond_ep_reg_set *)&USB->USB_EPC3_REG,
(struct smartbond_ep_reg_set *)&USB->USB_EPC5_REG,
};
struct smartbond_ep_state {
atomic_t busy;
uint8_t *buffer;
uint16_t total_len; /** Total length of current transfer */
uint16_t transferred; /** Bytes transferred so far */
uint16_t mps; /** Endpoint max packet size */
/** Packet size sent or received so far. It is used to modify transferred field
* after ACK is received or when filling ISO endpoint with size larger then
* FIFO size.
*/
uint16_t last_packet_size;
usb_dc_ep_callback cb; /** Endpoint callback function */
uint8_t data1 : 1; /** DATA0/1 toggle bit 1 DATA1 is expected or transmitted */
uint8_t stall : 1; /** Endpoint is stalled */
uint8_t iso : 1; /** ISO endpoint */
uint8_t ep_addr; /** EP address */
struct smartbond_ep_reg_set *regs;
};
struct usb_dc_state {
bool vbus_present;
bool attached;
uint8_t nfsr;
usb_dc_status_callback status_cb;
struct smartbond_ep_state ep_state[2][4];
atomic_ptr_t dma_ep[2]; /** DMA used by channel */
};
static struct usb_dc_state dev_state;
#define DA146XX_DMA_USB_MUX (0x6 << ((DMA_CHANNEL_RX) * 2))
#define DA146XX_DMA_USB_MUX_MASK (0xF << ((DMA_CHANNEL_RX) * 2))
struct smartbond_dma_channel {
uint32_t dma_a_start;
uint32_t dma_b_start;
uint32_t dma_int;
uint32_t dma_len;
uint32_t dma_ctrl;
uint32_t dma_idx;
/* Extend structure size for array like usage, registers for each channel
* are 0x20 bytes apart.
*/
volatile uint32_t RESERVED[2];
};
#define DMA_CHANNEL_REGS(n) ((struct smartbond_dma_channel *)(DMA) + (n))
#define RX_DMA_REGS DMA_CHANNEL_REGS(DMA_CHANNEL_RX)
#define TX_DMA_REGS DMA_CHANNEL_REGS(DMA_CHANNEL_TX)
#define RX_DMA_START ((1 << DMA_DMA0_CTRL_REG_DMA_ON_Pos) | \
(0 << DMA_DMA0_CTRL_REG_BW_Pos) | \
(1 << DMA_DMA0_CTRL_REG_DREQ_MODE_Pos) | \
(1 << DMA_DMA0_CTRL_REG_BINC_Pos) | \
(0 << DMA_DMA0_CTRL_REG_AINC_Pos) | \
(0 << DMA_DMA0_CTRL_REG_CIRCULAR_Pos) | \
(2 << DMA_DMA0_CTRL_REG_DMA_PRIO_Pos) | \
(0 << DMA_DMA0_CTRL_REG_DMA_IDLE_Pos) | \
(0 << DMA_DMA0_CTRL_REG_DMA_INIT_Pos) | \
(0 << DMA_DMA0_CTRL_REG_REQ_SENSE_Pos) | \
(0 << DMA_DMA0_CTRL_REG_BURST_MODE_Pos) | \
(0 << DMA_DMA0_CTRL_REG_BUS_ERROR_DETECT_Pos))
#define TX_DMA_START ((1 << DMA_DMA0_CTRL_REG_DMA_ON_Pos) | \
(0 << DMA_DMA0_CTRL_REG_BW_Pos) | \
(1 << DMA_DMA0_CTRL_REG_DREQ_MODE_Pos) | \
(0 << DMA_DMA0_CTRL_REG_BINC_Pos) | \
(1 << DMA_DMA0_CTRL_REG_AINC_Pos) | \
(0 << DMA_DMA0_CTRL_REG_CIRCULAR_Pos) | \
(7 << DMA_DMA0_CTRL_REG_DMA_PRIO_Pos) | \
(0 << DMA_DMA0_CTRL_REG_DMA_IDLE_Pos) | \
(0 << DMA_DMA0_CTRL_REG_DMA_INIT_Pos) | \
(1 << DMA_DMA0_CTRL_REG_REQ_SENSE_Pos) | \
(0 << DMA_DMA0_CTRL_REG_BURST_MODE_Pos) | \
(0 << DMA_DMA0_CTRL_REG_BUS_ERROR_DETECT_Pos))
/*
* DA146xx register fields and bit mask are very long. Filed masks repeat register names.
* Those convenience macros are a way to reduce complexity of register modification lines.
*/
#define GET_BIT(val, field) (val & field ## _Msk) >> field ## _Pos
#define REG_GET_BIT(reg, field) (USB->reg & USB_ ## reg ## _ ## field ## _Msk)
#define REG_SET_BIT(reg, field) USB->reg |= USB_ ## reg ## _ ## field ## _Msk
#define REG_CLR_BIT(reg, field) USB->reg &= ~USB_ ## reg ## _ ## field ## _Msk
#define REG_SET_VAL(reg, field, val) \
USB->reg = (USB->reg & ~USB_##reg##_##field##_Msk) | \
(val << USB_##reg##_##field##_Pos)
static struct smartbond_ep_state *usb_dc_get_ep_state(uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
uint8_t ep_dir = USB_EP_GET_DIR(ep) ? 1 : 0;
return (ep_idx < EP_MAX) ? &dev_state.ep_state[ep_dir][ep_idx] : NULL;
}
static struct smartbond_ep_state *usb_dc_get_ep_out_state(uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
return (ep_idx < EP_MAX && USB_EP_DIR_IS_OUT(ep)) ?
&dev_state.ep_state[0][ep_idx] : NULL;
}
static struct smartbond_ep_state *usb_dc_get_ep_in_state(uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
return ep_idx < EP_MAX || USB_EP_DIR_IS_IN(ep) ?
&dev_state.ep_state[1][ep_idx] : NULL;
}
static inline bool dev_attached(void)
{
return dev_state.attached;
}
static inline bool dev_ready(void)
{
return dev_state.vbus_present;
}
static void set_nfsr(uint8_t val)
{
dev_state.nfsr = val;
/*
* Write only lower 2 bits to register, higher bits are used
* to count down till OPERATIONAL state can be entered when
* remote wakeup activated.
*/
USB->USB_NFSR_REG = val & 3;
}
static void fill_tx_fifo(struct smartbond_ep_state *ep_state)
{
int remaining;
const uint8_t *src;
uint8_t ep_idx = USB_EP_GET_IDX(ep_state->ep_addr);
struct smartbond_ep_reg_set *regs = ep_state->regs;
src = &ep_state->buffer[ep_state->transferred];
remaining = ep_state->total_len - ep_state->transferred;
if (remaining > ep_state->mps - ep_state->last_packet_size) {
remaining = ep_state->mps - ep_state->last_packet_size;
}
/*
* Loop checks TCOUNT all the time since this value is saturated to 31
* and can't be read just once before.
*/
while ((regs->txs & USB_USB_TXS1_REG_USB_TCOUNT_Msk) > 0 &&
remaining > 0) {
regs->txd = *src++;
ep_state->last_packet_size++;
remaining--;
}
if (ep_idx != 0) {
if (remaining > 0) {
/*
* Max packet size is set to value greater then FIFO.
* Enable fifo level warning to handle larger packets.
*/
regs->txc |= (3 << USB_USB_TXC1_REG_USB_TFWL_Pos);
USB->USB_FWMSK_REG |=
BIT(ep_idx - 1 + USB_USB_FWMSK_REG_USB_M_TXWARN31_Pos);
} else {
regs->txc &= ~USB_USB_TXC1_REG_USB_TFWL_Msk;
USB->USB_FWMSK_REG &=
~(BIT(ep_idx - 1 + USB_USB_FWMSK_REG_USB_M_TXWARN31_Pos));
/* Whole packet already in fifo, no need to
* refill it later. Mark last.
*/
regs->txc |= USB_USB_TXC1_REG_USB_LAST_Msk;
}
}
}
static bool try_allocate_dma(struct smartbond_ep_state *ep_state, uint8_t dir)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep_state->ep_addr);
uint8_t dir_ix = dir == USB_EP_DIR_OUT ? 0 : 1;
if (atomic_ptr_cas(&dev_state.dma_ep[dir_ix], NULL, ep_state)) {
if (dir == USB_EP_DIR_OUT) {
USB->USB_DMA_CTRL_REG =
(USB->USB_DMA_CTRL_REG & ~USB_USB_DMA_CTRL_REG_USB_DMA_RX_Msk) |
((ep_idx - 1) << USB_USB_DMA_CTRL_REG_USB_DMA_RX_Pos);
} else {
USB->USB_DMA_CTRL_REG =
(USB->USB_DMA_CTRL_REG & ~USB_USB_DMA_CTRL_REG_USB_DMA_TX_Msk) |
((ep_idx - 1) << USB_USB_DMA_CTRL_REG_USB_DMA_TX_Pos);
}
USB->USB_DMA_CTRL_REG |= USB_USB_DMA_CTRL_REG_USB_DMA_EN_Msk;
return true;
} else {
return false;
}
}
static void start_rx_dma(volatile void *src, void *dst, uint16_t size)
{
LOG_DBG("");
/* Setup SRC and DST registers */
RX_DMA_REGS->dma_a_start = (uint32_t)src;
RX_DMA_REGS->dma_b_start = (uint32_t)dst;
/* Don't need DMA interrupt, read end is determined by
* RX_LAST or RX_ERR events.
*/
RX_DMA_REGS->dma_int = size - 1;
RX_DMA_REGS->dma_len = size - 1;
RX_DMA_REGS->dma_ctrl = RX_DMA_START;
}
static void start_rx_packet(struct smartbond_ep_state *ep_state)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep_state->ep_addr);
struct smartbond_ep_reg_set *regs = ep_state->regs;
LOG_DBG("%02x", ep_state->ep_addr);
ep_state->last_packet_size = 0;
ep_state->transferred = 0;
ep_state->total_len = 0;
if (ep_state->mps > DMA_MIN_TRANSFER_SIZE) {
if (try_allocate_dma(ep_state, USB_EP_DIR_OUT)) {
start_rx_dma(&regs->rxd,
ep_state->buffer,
ep_state->mps);
} else if (ep_state->mps > EP_FIFO_SIZE) {
/*
* Other endpoint is using DMA in that direction,
* fall back to interrupts.
* For endpoint size greater than FIFO size,
* enable FIFO level warning interrupt when FIFO
* has less than 17 bytes free.
*/
regs->rxc |= USB_USB_RXC1_REG_USB_RFWL_Msk;
USB->USB_FWMSK_REG |=
BIT(ep_idx - 1 + USB_USB_FWMSK_REG_USB_M_RXWARN31_Pos);
}
} else if (ep_idx != 0) {
/* If max_packet_size would fit in FIFO no need
* for FIFO level warning interrupt.
*/
regs->rxc &= ~USB_USB_RXC1_REG_USB_RFWL_Msk;
USB->USB_FWMSK_REG &= ~(BIT(ep_idx - 1 + USB_USB_FWMSK_REG_USB_M_RXWARN31_Pos));
}
regs->rxc |= USB_USB_RXC1_REG_USB_RX_EN_Msk;
}
static void start_tx_dma(void *src, volatile void *dst, uint16_t size)
{
LOG_DBG("%d", size);
/* Setup SRC and DST registers. */
TX_DMA_REGS->dma_a_start = (uint32_t)src;
TX_DMA_REGS->dma_b_start = (uint32_t)dst;
/* Interrupt not needed. */
TX_DMA_REGS->dma_int = size;
TX_DMA_REGS->dma_len = size - 1;
TX_DMA_REGS->dma_ctrl = TX_DMA_START;
}
static void start_tx_packet(struct smartbond_ep_state *ep_state)
{
struct smartbond_ep_reg_set *regs = ep_state->regs;
uint16_t remaining = ep_state->total_len - ep_state->transferred;
uint16_t size = MIN(remaining, ep_state->mps);
LOG_DBG("%02x %d/%d", ep_state->ep_addr, size, remaining);
ep_state->last_packet_size = 0;
regs->txc = USB_USB_TXC1_REG_USB_FLUSH_Msk;
regs->txc = USB_USB_TXC1_REG_USB_IGN_ISOMSK_Msk;
if (ep_state->data1) {
regs->txc |= USB_USB_TXC1_REG_USB_TOGGLE_TX_Msk;
}
if (ep_state->ep_addr != EP0_IN &&
remaining > DMA_MIN_TRANSFER_SIZE &&
(uint32_t)(ep_state->buffer) >= CONFIG_SRAM_BASE_ADDRESS &&
try_allocate_dma(ep_state, USB_EP_DIR_IN)) {
/* Whole packet will be put in FIFO by DMA.
* Set LAST bit before start.
*/
start_tx_dma(ep_state->buffer + ep_state->transferred,
&regs->txd, size);
regs->txc |= USB_USB_TXC1_REG_USB_LAST_Msk;
} else {
fill_tx_fifo(ep_state);
}
regs->txc |= USB_USB_TXC1_REG_USB_TX_EN_Msk;
}
static uint16_t read_rx_fifo(struct smartbond_ep_state *ep_state,
uint16_t bytes_in_fifo)
{
struct smartbond_ep_reg_set *regs = ep_state->regs;
uint16_t remaining = ep_state->mps - ep_state->last_packet_size;
uint16_t receive_this_time = bytes_in_fifo;
uint8_t *buf = ep_state->buffer + ep_state->last_packet_size;
if (remaining < bytes_in_fifo) {
receive_this_time = remaining;
}
for (int i = 0; i < receive_this_time; ++i) {
buf[i] = regs->rxd;
}
ep_state->last_packet_size += receive_this_time;
return bytes_in_fifo - receive_this_time;
}
static void handle_ep0_rx(void)
{
int fifo_bytes;
uint32_t rxs0 = USB->USB_RXS0_REG;
struct smartbond_ep_state *ep0_out_state = usb_dc_get_ep_out_state(0);
struct smartbond_ep_state *ep0_in_state;
fifo_bytes = GET_BIT(rxs0, USB_USB_RXS0_REG_USB_RCOUNT);
if (rxs0 & USB_USB_RXS0_REG_USB_SETUP_Msk) {
ep0_in_state = usb_dc_get_ep_in_state(0);
read_rx_fifo(ep0_out_state, EP0_FIFO_SIZE);
ep0_out_state->stall = 0;
ep0_out_state->data1 = 1;
ep0_in_state->stall = 0;
ep0_in_state->data1 = 1;
REG_SET_BIT(USB_TXC0_REG, USB_TOGGLE_TX0);
REG_CLR_BIT(USB_EPC0_REG, USB_STALL);
LOG_DBG("Setup %02x %02x %02x %02x %02x %02x %02x %02x",
ep0_out_state->buffer[0],
ep0_out_state->buffer[1],
ep0_out_state->buffer[2],
ep0_out_state->buffer[3],
ep0_out_state->buffer[4],
ep0_out_state->buffer[5],
ep0_out_state->buffer[6],
ep0_out_state->buffer[7]);
ep0_out_state->cb(EP0_OUT, USB_DC_EP_SETUP);
} else {
if (GET_BIT(rxs0, USB_USB_RXS0_REG_USB_TOGGLE_RX0) !=
ep0_out_state->data1) {
/* Toggle bit does not match discard packet */
REG_SET_BIT(USB_RXC0_REG, USB_FLUSH);
ep0_out_state->last_packet_size = 0;
} else {
read_rx_fifo(ep0_out_state, fifo_bytes);
if (rxs0 & USB_USB_RXS0_REG_USB_RX_LAST_Msk) {
ep0_out_state->data1 ^= 1;
ep0_out_state->cb(EP0_OUT, USB_DC_EP_DATA_OUT);
}
}
}
}
static void handle_ep0_tx(void)
{
uint32_t txs0;
struct smartbond_ep_state *ep0_in_state = usb_dc_get_ep_in_state(0);
struct smartbond_ep_state *ep0_out_state = usb_dc_get_ep_out_state(0);
struct smartbond_ep_reg_set *regs = ep0_in_state->regs;
txs0 = regs->txs;
LOG_DBG("%02x %02x", ep0_in_state->ep_addr, txs0);
if (GET_BIT(txs0, USB_USB_TXS0_REG_USB_TX_DONE)) {
/* ACK received */
if (GET_BIT(txs0, USB_USB_TXS0_REG_USB_ACK_STAT)) {
ep0_in_state->transferred +=
ep0_in_state->last_packet_size;
ep0_in_state->last_packet_size = 0;
ep0_in_state->data1 ^= 1;
REG_SET_VAL(USB_TXC0_REG, USB_TOGGLE_TX0,
ep0_in_state->data1);
if (ep0_in_state->transferred == ep0_in_state->total_len) {
/* For control endpoint get ready for ACK stage
* from host.
*/
ep0_out_state = usb_dc_get_ep_out_state(EP0_IDX);
ep0_out_state->transferred = 0;
ep0_out_state->total_len = 0;
ep0_out_state->last_packet_size = 0;
REG_SET_BIT(USB_RXC0_REG, USB_RX_EN);
atomic_clear(&ep0_in_state->busy);
ep0_in_state->cb(EP0_IN, USB_DC_EP_DATA_IN);
return;
}
} else {
/* Start from the beginning */
ep0_in_state->last_packet_size = 0;
}
start_tx_packet(ep0_in_state);
}
}
static void handle_epx_rx_ev(uint8_t ep_idx)
{
uint32_t rxs;
int fifo_bytes;
struct smartbond_ep_state *ep_state = usb_dc_get_ep_out_state(ep_idx);
struct smartbond_ep_reg_set *regs = ep_state->regs;
do {
rxs = regs->rxs;
if (GET_BIT(rxs, USB_USB_RXS1_REG_USB_RX_ERR)) {
regs->rxc |= USB_USB_RXC1_REG_USB_FLUSH_Msk;
ep_state->last_packet_size = 0;
if (dev_state.dma_ep[0] == ep_state) {
/* Stop DMA */
RX_DMA_REGS->dma_ctrl &= ~DMA_DMA0_CTRL_REG_DMA_ON_Msk;
/* Restart DMA since packet was dropped,
* all parameters should still work.
*/
RX_DMA_REGS->dma_ctrl |= DMA_DMA0_CTRL_REG_DMA_ON_Msk;
}
break;
}
if (dev_state.dma_ep[0] == ep_state) {
/* Disable DMA and update last_packet_size
* with what DMA reported.
*/
RX_DMA_REGS->dma_ctrl &= ~DMA_DMA0_CTRL_REG_DMA_ON_Msk;
ep_state->last_packet_size = RX_DMA_REGS->dma_idx;
/*
* When DMA did not finished (packet was smaller then MPS),
* dma_idx holds exact number of bytes transmitted. When DMA
* finished value in dma_idx is one less then actual number of
* transmitted bytes.
*/
if (ep_state->last_packet_size == RX_DMA_REGS->dma_len) {
ep_state->last_packet_size++;
}
/* Release DMA to use by other endpoints. */
dev_state.dma_ep[0] = NULL;
}
fifo_bytes = GET_BIT(rxs, USB_USB_RXS1_REG_USB_RXCOUNT);
/*
* FIFO maybe empty if DMA read it before or
* it's final iteration and function already read all
* that was to read.
*/
if (fifo_bytes > 0) {
fifo_bytes = read_rx_fifo(ep_state, fifo_bytes);
}
if (GET_BIT(rxs, USB_USB_RXS1_REG_USB_RX_LAST)) {
if (!ep_state->iso &&
GET_BIT(rxs, USB_USB_RXS1_REG_USB_TOGGLE_RX) !=
ep_state->data1) {
/* Toggle bit does not match discard packet */
regs->rxc |= USB_USB_RXC1_REG_USB_FLUSH_Msk;
ep_state->last_packet_size = 0;
/* Re-enable reception */
start_rx_packet(ep_state);
} else {
ep_state->data1 ^= 1;
atomic_clear(&ep_state->busy);
ep_state->cb(ep_state->ep_addr,
USB_DC_EP_DATA_OUT);
}
}
} while (fifo_bytes > FIFO_READ_THRESHOLD);
}
static void handle_rx_ev(void)
{
if (USB->USB_RXEV_REG & BIT(0)) {
handle_epx_rx_ev(1);
}
if (USB->USB_RXEV_REG & BIT(1)) {
handle_epx_rx_ev(2);
}
if (USB->USB_RXEV_REG & BIT(2)) {
handle_epx_rx_ev(3);
}
}
static void handle_epx_tx_ev(struct smartbond_ep_state *ep_state)
{
uint32_t txs;
struct smartbond_ep_reg_set *regs = ep_state->regs;
txs = regs->txs;
if (GET_BIT(txs, USB_USB_TXS1_REG_USB_TX_DONE)) {
if (dev_state.dma_ep[1] == ep_state) {
/* Disable DMA and update last_packet_size with what
* DMA reported.
*/
TX_DMA_REGS->dma_ctrl &= ~DMA_DMA1_CTRL_REG_DMA_ON_Msk;
ep_state->last_packet_size = TX_DMA_REGS->dma_idx + 1;
/* Release DMA to used by other endpoints. */
dev_state.dma_ep[1] = NULL;
}
if (GET_BIT(txs, USB_USB_TXS1_REG_USB_ACK_STAT)) {
/* ACK received, update transfer state and DATA0/1 bit */
ep_state->transferred += ep_state->last_packet_size;
ep_state->last_packet_size = 0;
ep_state->data1 ^= 1;
if (ep_state->transferred == ep_state->total_len) {
atomic_clear(&ep_state->busy);
ep_state->cb(ep_state->ep_addr, USB_DC_EP_DATA_IN);
return;
}
} else if (regs->epc_in & USB_USB_EPC1_REG_USB_STALL_Msk) {
/*
* TX_DONE also indicates that STALL packet was just sent,
* there is no point to put anything into transmit FIFO.
* It could result in empty packet being scheduled.
*/
return;
}
}
if (txs & USB_USB_TXS1_REG_USB_TX_URUN_Msk) {
LOG_DBG("EP 0x%02x FIFO underrun\n", ep_state->ep_addr);
}
/* Start next or repeated packet. */
start_tx_packet(ep_state);
}
static void handle_tx_ev(void)
{
if (USB->USB_TXEV_REG & BIT(0)) {
handle_epx_tx_ev(usb_dc_get_ep_in_state(1));
}
if (USB->USB_TXEV_REG & BIT(1)) {
handle_epx_tx_ev(usb_dc_get_ep_in_state(2));
}
if (USB->USB_TXEV_REG & BIT(2)) {
handle_epx_tx_ev(usb_dc_get_ep_in_state(3));
}
}
static uint32_t check_reset_end(uint32_t alt_ev)
{
if (dev_state.nfsr == NFSR_NODE_RESET) {
if (GET_BIT(alt_ev, USB_USB_ALTEV_REG_USB_RESET)) {
/*
* Could be still in reset, but since USB_M_RESET is
* disabled it can be also old reset state that was not
* cleared yet.
* If (after reading USB_ALTEV_REG register again)
* bit is cleared reset state just ended.
* Keep non-reset bits combined from two previous
* ALTEV read and one from the next line.
*/
alt_ev = (alt_ev & ~USB_USB_ALTEV_REG_USB_RESET_Msk) |
USB->USB_ALTEV_REG;
}
if (GET_BIT(alt_ev, USB_USB_ALTEV_REG_USB_RESET) == 0) {
USB->USB_ALTMSK_REG = USB_USB_ALTMSK_REG_USB_M_RESET_Msk |
USB_USB_ALTEV_REG_USB_SD3_Msk;
if (dev_state.ep_state[0][0].buffer != NULL) {
USB->USB_MAMSK_REG |=
USB_USB_MAMSK_REG_USB_M_EP0_RX_Msk;
}
LOG_INF("Set operational %02x", USB->USB_MAMSK_REG);
set_nfsr(NFSR_NODE_OPERATIONAL);
}
}
return alt_ev;
}
static void handle_bus_reset(void)
{
uint32_t alt_ev;
USB->USB_NFSR_REG = 0;
USB->USB_FAR_REG = 0x80;
USB->USB_ALTMSK_REG = 0;
USB->USB_NFSR_REG = NFSR_NODE_RESET;
USB->USB_TXMSK_REG = 0;
USB->USB_RXMSK_REG = 0;
set_nfsr(NFSR_NODE_RESET);
for (int i = 0; i < EP_MAX; ++i) {
dev_state.ep_state[1][i].buffer = NULL;
dev_state.ep_state[1][i].transferred = 0;
dev_state.ep_state[1][i].total_len = 0;
atomic_clear(&dev_state.ep_state[1][i].busy);
}
LOG_INF("send USB_DC_RESET");
dev_state.status_cb(USB_DC_RESET, NULL);
USB->USB_DMA_CTRL_REG = 0;
USB->USB_MAMSK_REG = USB_USB_MAMSK_REG_USB_M_INTR_Msk |
USB_USB_MAMSK_REG_USB_M_FRAME_Msk |
USB_USB_MAMSK_REG_USB_M_WARN_Msk |
USB_USB_MAMSK_REG_USB_M_ALT_Msk |
USB_USB_MAMSK_REG_USB_M_EP0_RX_Msk |
USB_USB_MAMSK_REG_USB_M_EP0_TX_Msk;
USB->USB_ALTMSK_REG = USB_USB_ALTMSK_REG_USB_M_RESUME_Msk;
alt_ev = USB->USB_ALTEV_REG;
check_reset_end(alt_ev);
}
static void handle_alt_ev(void)
{
struct smartbond_ep_state *ep_state;
uint32_t alt_ev = USB->USB_ALTEV_REG;
alt_ev = check_reset_end(alt_ev);
if (GET_BIT(alt_ev, USB_USB_ALTEV_REG_USB_RESET) &&
dev_state.nfsr != NFSR_NODE_RESET) {
handle_bus_reset();
} else if (GET_BIT(alt_ev, USB_USB_ALTEV_REG_USB_RESUME)) {
if (USB->USB_NFSR_REG == NFSR_NODE_SUSPEND) {
set_nfsr(NFSR_NODE_OPERATIONAL);
if (dev_state.ep_state[0][0].buffer != NULL) {
USB->USB_MAMSK_REG |=
USB_USB_MAMSK_REG_USB_M_EP0_RX_Msk;
}
USB->USB_ALTMSK_REG = USB_USB_ALTMSK_REG_USB_M_RESET_Msk |
USB_USB_ALTMSK_REG_USB_M_SD3_Msk;
/* Re-enable reception of endpoint with pending transfer */
for (int ep_num = 1; ep_num < EP_MAX; ++ep_num) {
ep_state = usb_dc_get_ep_out_state(ep_num);
if (ep_state->total_len > ep_state->transferred) {
start_rx_packet(ep_state);
}
}
dev_state.status_cb(USB_DC_RESUME, NULL);
}
} else if (GET_BIT(alt_ev, USB_USB_ALTEV_REG_USB_SD3)) {
set_nfsr(NFSR_NODE_SUSPEND);
USB->USB_ALTMSK_REG =
USB_USB_ALTMSK_REG_USB_M_RESET_Msk |
USB_USB_ALTMSK_REG_USB_M_RESUME_Msk;
dev_state.status_cb(USB_DC_SUSPEND, NULL);
}
}
static void handle_epx_tx_warn_ev(uint8_t ep_idx)
{
fill_tx_fifo(usb_dc_get_ep_in_state(ep_idx));
}
static void handle_fifo_warning(void)
{
uint32_t fifo_warning = USB->USB_FWEV_REG;
if (fifo_warning & BIT(0)) {
handle_epx_tx_warn_ev(1);
}
if (fifo_warning & BIT(1)) {
handle_epx_tx_warn_ev(2);
}
if (fifo_warning & BIT(2)) {
handle_epx_tx_warn_ev(3);
}
if (fifo_warning & BIT(4)) {
handle_epx_rx_ev(1);
}
if (fifo_warning & BIT(5)) {
handle_epx_rx_ev(2);
}
if (fifo_warning & BIT(6)) {
handle_epx_rx_ev(3);
}
}
static void handle_ep0_nak(void)
{
uint32_t ep0_nak = USB->USB_EP0_NAK_REG;
if (REG_GET_BIT(USB_EPC0_REG, USB_STALL)) {
if (GET_BIT(ep0_nak, USB_USB_EP0_NAK_REG_USB_EP0_INNAK)) {
/*
* EP0 is stalled and NAK was sent, it means that
* RX is enabled. Disable RX for now.
*/
REG_CLR_BIT(USB_RXC0_REG, USB_RX_EN);
REG_SET_BIT(USB_TXC0_REG, USB_TX_EN);
}
if (GET_BIT(ep0_nak, USB_USB_EP0_NAK_REG_USB_EP0_OUTNAK)) {
REG_SET_BIT(USB_RXC0_REG, USB_RX_EN);
}
} else {
if (REG_GET_BIT(USB_RXC0_REG, USB_RX_EN) == 0 &&
GET_BIT(ep0_nak, USB_USB_EP0_NAK_REG_USB_EP0_OUTNAK)) {
/* NAK over EP0 was sent, transmit should conclude */
USB->USB_TXC0_REG = USB_USB_TXC0_REG_USB_FLUSH_Msk;
REG_SET_BIT(USB_RXC0_REG, USB_FLUSH);
REG_SET_BIT(USB_RXC0_REG, USB_RX_EN);
REG_CLR_BIT(USB_MAMSK_REG, USB_M_EP0_NAK);
}
}
}
static void usb_dc_smartbond_isr(void)
{
uint32_t int_status = USB->USB_MAEV_REG & USB->USB_MAMSK_REG;
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_WARN)) {
handle_fifo_warning();
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_CH_EV)) {
/* For now just clear interrupt */
(void)USB->USB_CHARGER_STAT_REG;
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_EP0_TX)) {
handle_ep0_tx();
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_EP0_RX)) {
handle_ep0_rx();
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_EP0_NAK)) {
handle_ep0_nak();
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_RX_EV)) {
handle_rx_ev();
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_NAK)) {
(void)USB->USB_NAKEV_REG;
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_FRAME)) {
if (dev_state.nfsr == NFSR_NODE_RESET) {
/*
* During reset FRAME interrupt is enabled to periodically
* check when reset state ends.
* FRAME interrupt is generated every 1ms without host sending
* actual SOF.
*/
check_reset_end(USB_USB_ALTEV_REG_USB_RESET_Msk);
} else if (dev_state.nfsr == NFSR_NODE_WAKING) {
/* No need to call set_nfsr, just set state */
dev_state.nfsr = NFSR_NODE_WAKING2;
} else if (dev_state.nfsr == NFSR_NODE_WAKING2) {
/* No need to call set_nfsr, just set state */
dev_state.nfsr = NFSR_NODE_RESUME;
LOG_DBG("dev_state.nfsr = NFSR_NODE_RESUME %02x",
USB->USB_MAMSK_REG);
} else if (dev_state.nfsr == NFSR_NODE_RESUME) {
set_nfsr(NFSR_NODE_OPERATIONAL);
if (dev_state.ep_state[0][0].buffer != NULL) {
USB->USB_MAMSK_REG |= USB_USB_MAMSK_REG_USB_M_EP0_RX_Msk;
}
LOG_DBG("Set operational %02x", USB->USB_MAMSK_REG);
} else {
USB->USB_MAMSK_REG &= ~USB_USB_MAMSK_REG_USB_M_FRAME_Msk;
}
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_TX_EV)) {
handle_tx_ev();
}
if (GET_BIT(int_status, USB_USB_MAEV_REG_USB_ALT)) {
handle_alt_ev();
}
}
static void usb_dc_smartbond_vbus_changed(bool present)
{
if (dev_state.vbus_present == present) {
return;
}
dev_state.vbus_present = present;
if (present) {
/* TODO: Add PD acquire when available */
/* If power event happened before USB started, delay dcd_connect
* until dcd_init is called.
*/
dev_state.status_cb(USB_DC_CONNECTED, NULL);
} else {
USB->USB_MCTRL_REG = 0;
dev_state.status_cb(USB_DC_DISCONNECTED, NULL);
/* TODO: Add PD release when available */
}
}
static void usb_dc_smartbond_vbus_isr(void)
{
bool vbus_present =
(CRG_TOP->ANA_STATUS_REG & CRG_TOP_ANA_STATUS_REG_VBUS_AVAILABLE_Msk) != 0;
CRG_TOP->VBUS_IRQ_CLEAR_REG = 1;
usb_dc_smartbond_vbus_changed(vbus_present);
}
static int usb_init(void)
{
for (int i = 0; i < EP_MAX; ++i) {
dev_state.ep_state[0][i].regs = reg_sets[i];
dev_state.ep_state[0][i].ep_addr = i | USB_EP_DIR_OUT;
dev_state.ep_state[0][i].buffer = ep_out_bufs[i];
dev_state.ep_state[1][i].regs = reg_sets[i];
dev_state.ep_state[1][i].ep_addr = i | USB_EP_DIR_IN;
}
/* Max packet size for EP0 is hardwired to 8 */
dev_state.ep_state[0][0].mps = EP0_FIFO_SIZE;
dev_state.ep_state[1][0].mps = EP0_FIFO_SIZE;
IRQ_CONNECT(VBUS_IRQ, VBUS_IRQ_PRI, usb_dc_smartbond_vbus_isr, 0, 0);
CRG_TOP->VBUS_IRQ_CLEAR_REG = 1;
NVIC_ClearPendingIRQ(VBUS_IRQ);
/* Both connect and disconnect needs to be handled */
CRG_TOP->VBUS_IRQ_MASK_REG = CRG_TOP_VBUS_IRQ_MASK_REG_VBUS_IRQ_EN_FALL_Msk |
CRG_TOP_VBUS_IRQ_MASK_REG_VBUS_IRQ_EN_RISE_Msk;
irq_enable(USB_IRQn);
IRQ_CONNECT(USB_IRQ, USB_IRQ_PRI, usb_dc_smartbond_isr, 0, 0);
irq_enable(USB_IRQ);
return 0;
}
int usb_dc_ep_disable(const uint8_t ep)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
LOG_DBG("%02x", ep);
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
if (ep_state->ep_addr == EP0_IN) {
REG_SET_BIT(USB_TXC0_REG, USB_IGN_IN);
} else if (ep_state->ep_addr == EP0_OUT) {
USB->USB_RXC0_REG = USB_USB_RXC0_REG_USB_IGN_SETUP_Msk |
USB_USB_RXC0_REG_USB_IGN_OUT_Msk;
} else if (USB_EP_DIR_IS_OUT(ep)) {
ep_state->regs->epc_out &= ~USB_USB_EPC2_REG_USB_EP_EN_Msk;
} else {
ep_state->regs->epc_in &= ~USB_USB_EPC1_REG_USB_EP_EN_Msk;
}
return 0;
}
int usb_dc_ep_mps(const uint8_t ep)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
return ep_state->mps;
}
int usb_dc_ep_read_continue(uint8_t ep)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_out_state(ep);
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
LOG_DBG("ep 0x%02x", ep);
/* If no more data in the buffer, start a new read transaction.
* DataOutStageCallback will called on transaction complete.
*/
if (ep_state->transferred >= ep_state->last_packet_size) {
start_rx_packet(ep_state);
}
return 0;
}
int usb_dc_ep_read_wait(uint8_t ep, uint8_t *data, uint32_t max_data_len,
uint32_t *read_bytes)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_out_state(ep);
uint16_t read_count;
if (ep_state == NULL) {
LOG_ERR("Invalid Endpoint %x", ep);
return -EINVAL;
}
LOG_DBG("ep 0x%02x, %u bytes, %p", ep, max_data_len, (void *)data);
read_count = ep_state->last_packet_size - ep_state->transferred;
/* When both buffer and max data to read are zero, just ignore reading
* and return available data in buffer. Otherwise, return data
* previously stored in the buffer.
*/
if (data) {
read_count = MIN(read_count, max_data_len);
memcpy(data, ep_state->buffer + ep_state->transferred, read_count);
ep_state->transferred += read_count;
} else if (max_data_len) {
LOG_ERR("Wrong arguments");
}
if (read_bytes) {
*read_bytes = read_count;
}
return 0;
}
int usb_dc_ep_read(const uint8_t ep, uint8_t *const data,
const uint32_t max_data_len, uint32_t *const read_bytes)
{
if (usb_dc_ep_read_wait(ep, data, max_data_len, read_bytes) != 0) {
return -EINVAL;
}
if (usb_dc_ep_read_continue(ep) != 0) {
return -EINVAL;
}
return 0;
}
int usb_dc_ep_check_cap(const struct usb_dc_ep_cfg_data *const cfg)
{
uint8_t ep_idx = USB_EP_GET_IDX(cfg->ep_addr);
LOG_DBG("ep %x, mps %d, type %d", cfg->ep_addr, cfg->ep_mps, cfg->ep_type);
if ((cfg->ep_type == USB_DC_EP_CONTROL && ep_idx != 0) ||
(cfg->ep_type != USB_DC_EP_CONTROL && ep_idx == 0)) {
LOG_ERR("invalid endpoint configuration");
return -EINVAL;
}
if (ep_idx > 3) {
LOG_ERR("endpoint address out of range");
return -EINVAL;
}
if (ep_out_buf_size[ep_idx] < cfg->ep_mps) {
LOG_ERR("endpoint size too big");
return -EINVAL;
}
return 0;
}
int usb_dc_ep_set_callback(const uint8_t ep, const usb_dc_ep_callback cb)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
LOG_DBG("%02x %p", ep, (void *)cb);
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
ep_state->cb = cb;
return 0;
}
void usb_dc_set_status_callback(const usb_dc_status_callback cb)
{
dev_state.status_cb = cb;
LOG_DBG("%p", cb);
/* Manually call IRQ handler in case when VBUS is already present */
usb_dc_smartbond_vbus_isr();
}
int usb_dc_reset(void)
{
int ret;
LOG_DBG("");
if (!dev_attached() || !dev_ready()) {
return -ENODEV;
}
ret = usb_dc_detach();
if (ret) {
return ret;
}
ret = usb_dc_attach();
if (ret) {
return ret;
}
return 0;
}
int usb_dc_set_address(const uint8_t addr)
{
LOG_DBG("%d", addr);
/* Set default address for one ZLP */
USB->USB_EPC0_REG = USB_USB_EPC0_REG_USB_DEF_Msk;
USB->USB_FAR_REG = (addr & USB_USB_FAR_REG_USB_AD_Msk) |
USB_USB_FAR_REG_USB_AD_EN_Msk;
return 0;
}
int usb_dc_ep_clear_stall(const uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
uint8_t ep_dir = USB_EP_GET_DIR(ep);
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
struct smartbond_ep_reg_set *regs;
LOG_DBG("%02x", ep);
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
regs = ep_state->regs;
/* Clear stall is called in response to Clear Feature ENDPOINT_HALT,
* reset toggle
*/
ep_state->stall = false;
ep_state->data1 = 0;
if (ep_dir == USB_EP_DIR_OUT) {
regs->epc_out &= ~USB_USB_EPC1_REG_USB_STALL_Msk;
} else {
regs->epc_in &= ~USB_USB_EPC1_REG_USB_STALL_Msk;
}
if (ep_idx == 0) {
REG_CLR_BIT(USB_MAMSK_REG, USB_M_EP0_NAK);
}
return 0;
}
int usb_dc_ep_enable(const uint8_t ep)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
uint8_t ep_idx = USB_EP_GET_IDX(ep);
uint8_t ep_dir = USB_EP_GET_DIR(ep);
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
LOG_DBG("%02x", ep);
if (ep_state->ep_addr == EP0_IN) {
USB->USB_MAMSK_REG |= USB_USB_MAMSK_REG_USB_M_EP0_TX_Msk;
} else if (ep_state->ep_addr == EP0_OUT) {
USB->USB_MAMSK_REG |= USB_USB_MAMSK_REG_USB_M_EP0_RX_Msk;
ep_state->last_packet_size = 0;
ep_state->transferred = 0;
ep_state->total_len = 0;
} else if (ep_dir == USB_EP_DIR_OUT) {
USB->USB_RXMSK_REG |= 0x11 << (ep_idx - 1);
REG_SET_BIT(USB_MAMSK_REG, USB_M_RX_EV);
ep_state->regs->epc_out |= USB_USB_EPC1_REG_USB_EP_EN_Msk;
if (ep_state->busy) {
return 0;
}
start_rx_packet(ep_state);
} else {
USB->USB_TXMSK_REG |= 0x11 << (ep_idx - 1);
REG_SET_BIT(USB_MAMSK_REG, USB_M_TX_EV);
ep_state->regs->epc_in |= USB_USB_EPC2_REG_USB_EP_EN_Msk;
}
return 0;
}
int usb_dc_ep_configure(const struct usb_dc_ep_cfg_data *const ep_cfg)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep_cfg->ep_addr);
uint8_t ep_idx = USB_EP_GET_IDX(ep_cfg->ep_addr);
uint8_t ep_dir = USB_EP_GET_DIR(ep_cfg->ep_addr);
uint8_t iso_mask;
if (ep_state == NULL) {
return -EINVAL;
}
LOG_DBG("%02x", ep_cfg->ep_addr);
ep_state->iso = ep_cfg->ep_type == USB_DC_EP_ISOCHRONOUS;
iso_mask = (ep_state->iso ? USB_USB_EPC2_REG_USB_ISO_Msk : 0);
if (ep_cfg->ep_type == USB_DC_EP_CONTROL) {
ep_state->mps = EP0_FIFO_SIZE;
} else {
ep_state->mps = ep_cfg->ep_mps;
}
ep_state->data1 = 0;
if (ep_dir == USB_EP_DIR_OUT) {
if (ep_cfg->ep_mps > ep_out_buf_size[ep_idx]) {
return -EINVAL;
}
ep_state->regs->epc_out = ep_idx | iso_mask;
} else {
ep_state->regs->epc_in = ep_idx | iso_mask;
}
return 0;
}
int usb_dc_detach(void)
{
LOG_DBG("");
REG_CLR_BIT(USB_MCTRL_REG, USB_NAT);
dev_state.attached = false;
return 0;
}
int usb_dc_attach(void)
{
LOG_DBG("");
if (GET_BIT(USB->USB_MCTRL_REG, USB_USB_MCTRL_REG_USB_NAT) == 0) {
USB->USB_MCTRL_REG = USB_USB_MCTRL_REG_USBEN_Msk;
USB->USB_NFSR_REG = 0;
USB->USB_FAR_REG = 0x80;
USB->USB_TXMSK_REG = 0;
USB->USB_RXMSK_REG = 0;
USB->USB_MAMSK_REG = USB_USB_MAMSK_REG_USB_M_INTR_Msk |
USB_USB_MAMSK_REG_USB_M_ALT_Msk |
USB_USB_MAMSK_REG_USB_M_WARN_Msk;
USB->USB_ALTMSK_REG = USB_USB_ALTMSK_REG_USB_M_RESET_Msk |
USB_USB_ALTEV_REG_USB_SD3_Msk;
USB->USB_MCTRL_REG = USB_USB_MCTRL_REG_USBEN_Msk |
USB_USB_MCTRL_REG_USB_NAT_Msk;
/* Select chosen DMA to be triggered by USB. */
DMA->DMA_REQ_MUX_REG =
(DMA->DMA_REQ_MUX_REG & ~DA146XX_DMA_USB_MUX_MASK) |
DA146XX_DMA_USB_MUX;
}
dev_state.attached = true;
return 0;
}
int usb_dc_ep_write(const uint8_t ep, const uint8_t *const data, const uint32_t data_len,
uint32_t *const ret_bytes)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
if (ep_state == NULL) {
LOG_ERR("%02x no ep_state", ep);
return -EINVAL;
}
LOG_DBG("%02x %d bytes", ep, (int)data_len);
if (!atomic_cas(&ep_state->busy, 0, 1)) {
LOG_DBG("%02x transfer already in progress", ep);
return -EAGAIN;
}
ep_state->buffer = (uint8_t *)data;
ep_state->transferred = 0;
ep_state->total_len = data_len;
ep_state->last_packet_size = 0;
if (ep == EP0_IN) {
/* RX has priority over TX to send packet RX needs to be off */
REG_CLR_BIT(USB_RXC0_REG, USB_RX_EN);
/* Handle case when device expect to send more data and
* host already send ZLP to confirm reception (that means
* that it will no longer try to read).
* Enable EP0_NAK.
*/
(void)USB->USB_EP0_NAK_REG;
REG_SET_BIT(USB_MAMSK_REG, USB_M_EP0_NAK);
}
start_tx_packet(ep_state);
if (ret_bytes) {
*ret_bytes = data_len;
}
return 0;
}
int usb_dc_ep_set_stall(const uint8_t ep)
{
uint8_t ep_idx = USB_EP_GET_IDX(ep);
uint8_t ep_dir = USB_EP_GET_DIR(ep);
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
struct smartbond_ep_reg_set *regs;
LOG_DBG("%02x", ep);
if (!dev_attached() || !dev_ready()) {
return -ENODEV;
}
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
regs = ep_state->regs;
ep_state->stall = 1;
if (ep_idx == 0) {
/* EP0 has just one registers to control stall for IN and OUT */
if (ep_dir == USB_EP_DIR_OUT) {
regs->rxc = USB_USB_RXC0_REG_USB_RX_EN_Msk;
REG_SET_BIT(USB_EPC0_REG, USB_STALL);
} else {
regs->rxc = 0;
regs->txc = USB_USB_TXC0_REG_USB_TX_EN_Msk;
REG_SET_BIT(USB_EPC0_REG, USB_STALL);
}
} else {
if (ep_dir == USB_EP_DIR_OUT) {
regs->epc_out |= USB_USB_EPC1_REG_USB_STALL_Msk;
regs->rxc |= USB_USB_RXC1_REG_USB_RX_EN_Msk;
} else {
regs->epc_in |= USB_USB_EPC1_REG_USB_STALL_Msk;
regs->txc |= USB_USB_TXC1_REG_USB_TX_EN_Msk | USB_USB_TXC1_REG_USB_LAST_Msk;
}
}
return 0;
}
int usb_dc_ep_is_stalled(const uint8_t ep, uint8_t *const stalled)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
if (!dev_attached() || !dev_ready()) {
return -ENODEV;
}
if (NULL == ep_state || NULL == stalled) {
return -EINVAL;
}
*stalled = ep_state->stall;
return 0;
}
int usb_dc_ep_halt(const uint8_t ep)
{
return usb_dc_ep_set_stall(ep);
}
int usb_dc_ep_flush(const uint8_t ep)
{
struct smartbond_ep_state *ep_state = usb_dc_get_ep_state(ep);
if (ep_state == NULL) {
LOG_ERR("Not valid endpoint: %02x", ep);
return -EINVAL;
}
LOG_ERR("Not implemented");
return 0;
}
SYS_INIT(usb_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);