mirror of
https://github.com/AsahiLinux/u-boot
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f298e4b6dd
This change adds the usb device support for musb. Omap3 platform support added at the same level as davinci. The interface for usbtty to use the musb device support was added. Verified on omap3 beagle, zoom1 and zoom2. Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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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_MUSB_HCD)
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u8 devctl;
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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_MUSB_HCD)
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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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/*
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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(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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writeb(idx, &musbr->txfifosz);
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writew(fifoaddr >> 3, &musbr->txfifoadd);
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csr = readw(&musbr->txcsr);
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#if defined(CONFIG_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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writeb(idx, &musbr->rxfifosz);
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writew(fifoaddr >> 3, &musbr->rxfifoadd);
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csr = readw(&musbr->rxcsr);
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#if defined(CONFIG_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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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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* 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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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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