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/*
* Mentor USB OTG Core functionality common for both Host and Device
* functionality.
*
* Copyright (c) 2008 Texas Instruments
*
* SPDX-License-Identifier: GPL-2.0+
*
* Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
*/
#include <common.h>
#include "musb_core.h"
struct musb_regs *musbr;
/*
* program the mentor core to start (enable interrupts, dma, etc.)
*/
void musb_start(void)
{
#if defined(CONFIG_MUSB_HCD)
u8 devctl;
u8 busctl;
#endif
/* disable all interrupts */
writew(0, &musbr->intrtxe);
writew(0, &musbr->intrrxe);
writeb(0, &musbr->intrusbe);
writeb(0, &musbr->testmode);
/* put into basic highspeed mode and start session */
writeb(MUSB_POWER_HSENAB, &musbr->power);
#if defined(CONFIG_MUSB_HCD)
/* Program PHY to use EXT VBUS if required */
if (musb_cfg.extvbus == 1) {
busctl = musb_read_ulpi_buscontrol(musbr);
musb_write_ulpi_buscontrol(musbr, busctl | ULPI_USE_EXTVBUS);
}
devctl = readb(&musbr->devctl);
writeb(devctl | MUSB_DEVCTL_SESSION, &musbr->devctl);
#endif
}
#ifdef MUSB_NO_DYNAMIC_FIFO
# define config_fifo(dir, idx, addr)
#else
# define config_fifo(dir, idx, addr) \
do { \
writeb(idx, &musbr->dir##fifosz); \
writew(fifoaddr >> 3, &musbr->dir##fifoadd); \
} while (0)
#endif
/*
* This function configures the endpoint configuration. The musb hcd or musb
* device implementation can use this function to configure the endpoints
* and set the FIFO sizes. Note: The summation of FIFO sizes of all endpoints
* should not be more than the available FIFO size.
*
* epinfo - Pointer to EP configuration table
* cnt - Number of entries in the EP conf table.
*/
void musb_configure_ep(const struct musb_epinfo *epinfo, u8 cnt)
{
u16 csr;
u16 fifoaddr = 64; /* First 64 bytes of FIFO reserved for EP0 */
u32 fifosize;
u8 idx;
while (cnt--) {
/* prepare fifosize to write to register */
fifosize = epinfo->epsize >> 3;
idx = ffs(fifosize) - 1;
writeb(epinfo->epnum, &musbr->index);
if (epinfo->epdir) {
/* Configure fifo size and fifo base address */
config_fifo(tx, idx, fifoaddr);
csr = readw(&musbr->txcsr);
#if defined(CONFIG_MUSB_HCD)
/* clear the data toggle bit */
writew(csr | MUSB_TXCSR_CLRDATATOG, &musbr->txcsr);
#endif
/* Flush fifo if required */
if (csr & MUSB_TXCSR_TXPKTRDY)
writew(csr | MUSB_TXCSR_FLUSHFIFO,
&musbr->txcsr);
} else {
/* Configure fifo size and fifo base address */
config_fifo(rx, idx, fifoaddr);
csr = readw(&musbr->rxcsr);
#if defined(CONFIG_MUSB_HCD)
/* clear the data toggle bit */
writew(csr | MUSB_RXCSR_CLRDATATOG, &musbr->rxcsr);
#endif
/* Flush fifo if required */
if (csr & MUSB_RXCSR_RXPKTRDY)
writew(csr | MUSB_RXCSR_FLUSHFIFO,
&musbr->rxcsr);
}
fifoaddr += epinfo->epsize;
epinfo++;
}
}
/*
* This function writes data to endpoint fifo
*
* ep - endpoint number
* length - number of bytes to write to FIFO
* fifo_data - Pointer to data buffer that contains the data to write
*/
__attribute__((weak))
void write_fifo(u8 ep, u32 length, void *fifo_data)
{
u8 *data = (u8 *)fifo_data;
/* select the endpoint index */
writeb(ep, &musbr->index);
/* write the data to the fifo */
while (length--)
writeb(*data++, &musbr->fifox[ep]);
}
/*
* AM35x supports only 32bit read operations so
* use seperate read_fifo() function for it.
*/
#ifndef CONFIG_USB_AM35X
/*
* This function reads data from endpoint fifo
*
* ep - endpoint number
* length - number of bytes to read from FIFO
* fifo_data - pointer to data buffer into which data is read
*/
__attribute__((weak))
void read_fifo(u8 ep, u32 length, void *fifo_data)
{
u8 *data = (u8 *)fifo_data;
/* select the endpoint index */
writeb(ep, &musbr->index);
/* read the data to the fifo */
while (length--)
*data++ = readb(&musbr->fifox[ep]);
}
#endif /* CONFIG_USB_AM35X */
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