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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Mentor USB OTG Core functionality common for both Host and Device
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* functionality.
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*
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* Copyright (c) 2008 Texas Instruments
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*
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* Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
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*/
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#include <common.h>
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#include "musb_core.h"
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struct musb_regs *musbr;
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/*
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* program the mentor core to start (enable interrupts, dma, etc.)
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*/
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void musb_start(void)
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{
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#if defined(CONFIG_USB_MUSB_HCD)
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u8 devctl;
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u8 busctl;
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#endif
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/* disable all interrupts */
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writew(0, &musbr->intrtxe);
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writew(0, &musbr->intrrxe);
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writeb(0, &musbr->intrusbe);
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writeb(0, &musbr->testmode);
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/* put into basic highspeed mode and start session */
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writeb(MUSB_POWER_HSENAB, &musbr->power);
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#if defined(CONFIG_USB_MUSB_HCD)
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/* Program PHY to use EXT VBUS if required */
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if (musb_cfg.extvbus == 1) {
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busctl = musb_read_ulpi_buscontrol(musbr);
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musb_write_ulpi_buscontrol(musbr, busctl | ULPI_USE_EXTVBUS);
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}
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devctl = readb(&musbr->devctl);
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writeb(devctl | MUSB_DEVCTL_SESSION, &musbr->devctl);
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#endif
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}
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#ifdef MUSB_NO_DYNAMIC_FIFO
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# define config_fifo(dir, idx, addr)
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#else
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# define config_fifo(dir, idx, addr) \
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do { \
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writeb(idx, &musbr->dir##fifosz); \
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writew(fifoaddr >> 3, &musbr->dir##fifoadd); \
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} while (0)
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#endif
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/*
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* This function configures the endpoint configuration. The musb hcd or musb
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* device implementation can use this function to configure the endpoints
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* and set the FIFO sizes. Note: The summation of FIFO sizes of all endpoints
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* should not be more than the available FIFO size.
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*
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* epinfo - Pointer to EP configuration table
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* cnt - Number of entries in the EP conf table.
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*/
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void musb_configure_ep(const struct musb_epinfo *epinfo, u8 cnt)
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{
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u16 csr;
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u16 fifoaddr = 64; /* First 64 bytes of FIFO reserved for EP0 */
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u32 fifosize;
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u8 idx;
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while (cnt--) {
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/* prepare fifosize to write to register */
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fifosize = epinfo->epsize >> 3;
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idx = ffs(fifosize) - 1;
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writeb(epinfo->epnum, &musbr->index);
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if (epinfo->epdir) {
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/* Configure fifo size and fifo base address */
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config_fifo(tx, idx, fifoaddr);
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csr = readw(&musbr->txcsr);
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#if defined(CONFIG_USB_MUSB_HCD)
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/* clear the data toggle bit */
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writew(csr | MUSB_TXCSR_CLRDATATOG, &musbr->txcsr);
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#endif
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/* Flush fifo if required */
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if (csr & MUSB_TXCSR_TXPKTRDY)
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writew(csr | MUSB_TXCSR_FLUSHFIFO,
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&musbr->txcsr);
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} else {
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/* Configure fifo size and fifo base address */
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config_fifo(rx, idx, fifoaddr);
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csr = readw(&musbr->rxcsr);
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#if defined(CONFIG_USB_MUSB_HCD)
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/* clear the data toggle bit */
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writew(csr | MUSB_RXCSR_CLRDATATOG, &musbr->rxcsr);
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#endif
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/* Flush fifo if required */
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if (csr & MUSB_RXCSR_RXPKTRDY)
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writew(csr | MUSB_RXCSR_FLUSHFIFO,
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&musbr->rxcsr);
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}
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fifoaddr += epinfo->epsize;
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epinfo++;
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}
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}
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/*
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* This function writes data to endpoint fifo
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*
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* ep - endpoint number
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* length - number of bytes to write to FIFO
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* fifo_data - Pointer to data buffer that contains the data to write
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*/
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__attribute__((weak))
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void write_fifo(u8 ep, u32 length, void *fifo_data)
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{
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u8 *data = (u8 *)fifo_data;
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/* select the endpoint index */
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writeb(ep, &musbr->index);
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/* write the data to the fifo */
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while (length--)
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writeb(*data++, &musbr->fifox[ep]);
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}
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/*
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* AM35x supports only 32bit read operations so
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* use seperate read_fifo() function for it.
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*/
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#ifndef CONFIG_USB_AM35X
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/*
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* This function reads data from endpoint fifo
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*
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* ep - endpoint number
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* length - number of bytes to read from FIFO
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* fifo_data - pointer to data buffer into which data is read
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*/
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__attribute__((weak))
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void read_fifo(u8 ep, u32 length, void *fifo_data)
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{
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u8 *data = (u8 *)fifo_data;
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/* select the endpoint index */
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writeb(ep, &musbr->index);
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/* read the data to the fifo */
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while (length--)
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*data++ = readb(&musbr->fifox[ep]);
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}
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#endif /* CONFIG_USB_AM35X */
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