mirror of
https://github.com/torvalds/linux.git
synced 2024-11-12 15:11:50 +00:00
USB: musb: add Blackfin driver to MUSB framework (v2)
- replace MUSB_FIFOSIZE register to MUSB_TXCOUNT, cause no MUSB_FIFOSIZE register on Blackfin - use #ifdef to replace #if defined() Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Bryan Wu
Greg Kroah-Hartman
parent
2ffcdb3bda
commit
0c6a881844
316
drivers/usb/musb/blackfin.c
Normal file
316
drivers/usb/musb/blackfin.c
Normal file
@ -0,0 +1,316 @@
|
||||
/*
|
||||
* MUSB OTG controller driver for Blackfin Processors
|
||||
*
|
||||
* Copyright 2006-2008 Analog Devices Inc.
|
||||
*
|
||||
* Enter bugs at http://blackfin.uclinux.org/
|
||||
*
|
||||
* Licensed under the GPL-2 or later.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/gpio.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <asm/cacheflush.h>
|
||||
|
||||
#include "musb_core.h"
|
||||
#include "blackfin.h"
|
||||
|
||||
/*
|
||||
* Load an endpoint's FIFO
|
||||
*/
|
||||
void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
|
||||
{
|
||||
void __iomem *fifo = hw_ep->fifo;
|
||||
void __iomem *epio = hw_ep->regs;
|
||||
|
||||
prefetch((u8 *)src);
|
||||
|
||||
musb_writew(epio, MUSB_TXCOUNT, len);
|
||||
|
||||
DBG(4, "TX ep%d fifo %p count %d buf %p, epio %p\n",
|
||||
hw_ep->epnum, fifo, len, src, epio);
|
||||
|
||||
dump_fifo_data(src, len);
|
||||
|
||||
if (unlikely((unsigned long)src & 0x01))
|
||||
outsw_8(fifo, src, len & 0x01 ? (len >> 1) + 1 : len >> 1);
|
||||
else
|
||||
outsw(fifo, src, len & 0x01 ? (len >> 1) + 1 : len >> 1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Unload an endpoint's FIFO
|
||||
*/
|
||||
void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
|
||||
{
|
||||
void __iomem *fifo = hw_ep->fifo;
|
||||
u8 epnum = hw_ep->epnum;
|
||||
u16 dma_reg = 0;
|
||||
int i;
|
||||
u16 *data;
|
||||
|
||||
DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
|
||||
'R', hw_ep->epnum, fifo, len, dst);
|
||||
|
||||
#ifdef CONFIG_BF52x
|
||||
invalidate_dcache_range((unsigned int)dst,
|
||||
(unsigned int)(dst + len));
|
||||
|
||||
/* Setup DMA address register */
|
||||
dma_reg = (u16) ((u32) dst & 0xFFFF);
|
||||
bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_LOW), dma_reg);
|
||||
SSYNC();
|
||||
|
||||
dma_reg = (u16) (((u32) dst >> 16) & 0xFFFF);
|
||||
bfin_write16(USB_DMA_REG(epnum, USB_DMAx_ADDR_HIGH), dma_reg);
|
||||
SSYNC();
|
||||
|
||||
/* Setup DMA count register */
|
||||
bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_LOW), len);
|
||||
bfin_write16(USB_DMA_REG(epnum, USB_DMAx_COUNT_HIGH), 0);
|
||||
SSYNC();
|
||||
|
||||
/* Enable the DMA */
|
||||
dma_reg = (epnum << 4) | DMA_ENA | INT_ENA;
|
||||
bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), dma_reg);
|
||||
SSYNC();
|
||||
|
||||
/* Wait for compelete */
|
||||
while (!(bfin_read_USB_DMA_INTERRUPT() & (1 << epnum)))
|
||||
cpu_relax();
|
||||
|
||||
/* acknowledge dma interrupt */
|
||||
bfin_write_USB_DMA_INTERRUPT(1 << epnum);
|
||||
SSYNC();
|
||||
|
||||
/* Reset DMA */
|
||||
bfin_write16(USB_DMA_REG(epnum, USB_DMAx_CTRL), 0);
|
||||
SSYNC();
|
||||
#else
|
||||
if (unlikely((unsigned long)dst & 0x01))
|
||||
insw_8(fifo, dst, len & 0x01 ? (len >> 1) + 1 : len >> 1);
|
||||
else
|
||||
insw(fifo, dst, len & 0x01 ? (len >> 1) + 1 : len >> 1);
|
||||
#endif
|
||||
|
||||
dump_fifo_data(dst, len);
|
||||
}
|
||||
|
||||
static irqreturn_t blackfin_interrupt(int irq, void *__hci)
|
||||
{
|
||||
unsigned long flags;
|
||||
irqreturn_t retval = IRQ_NONE;
|
||||
struct musb *musb = __hci;
|
||||
|
||||
spin_lock_irqsave(&musb->lock, flags);
|
||||
|
||||
musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
|
||||
musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
|
||||
musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
|
||||
|
||||
if (musb->int_usb || musb->int_tx || musb->int_rx) {
|
||||
musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
|
||||
musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
|
||||
musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);
|
||||
retval = musb_interrupt(musb);
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&musb->lock, flags);
|
||||
|
||||
/* REVISIT we sometimes get spurious IRQs on g_ep0
|
||||
* not clear why... fall in BF54x too.
|
||||
*/
|
||||
if (retval != IRQ_HANDLED)
|
||||
DBG(5, "spurious?\n");
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void musb_conn_timer_handler(unsigned long _musb)
|
||||
{
|
||||
struct musb *musb = (void *)_musb;
|
||||
unsigned long flags;
|
||||
u16 val;
|
||||
|
||||
spin_lock_irqsave(&musb->lock, flags);
|
||||
switch (musb->xceiv.state) {
|
||||
case OTG_STATE_A_IDLE:
|
||||
case OTG_STATE_A_WAIT_BCON:
|
||||
/* Start a new session */
|
||||
val = musb_readw(musb->mregs, MUSB_DEVCTL);
|
||||
val |= MUSB_DEVCTL_SESSION;
|
||||
musb_writew(musb->mregs, MUSB_DEVCTL, val);
|
||||
|
||||
val = musb_readw(musb->mregs, MUSB_DEVCTL);
|
||||
if (!(val & MUSB_DEVCTL_BDEVICE)) {
|
||||
gpio_set_value(musb->config->gpio_vrsel, 1);
|
||||
musb->xceiv.state = OTG_STATE_A_WAIT_BCON;
|
||||
} else {
|
||||
gpio_set_value(musb->config->gpio_vrsel, 0);
|
||||
|
||||
/* Ignore VBUSERROR and SUSPEND IRQ */
|
||||
val = musb_readb(musb->mregs, MUSB_INTRUSBE);
|
||||
val &= ~MUSB_INTR_VBUSERROR;
|
||||
musb_writeb(musb->mregs, MUSB_INTRUSBE, val);
|
||||
|
||||
val = MUSB_INTR_SUSPEND | MUSB_INTR_VBUSERROR;
|
||||
musb_writeb(musb->mregs, MUSB_INTRUSB, val);
|
||||
|
||||
val = MUSB_POWER_HSENAB;
|
||||
musb_writeb(musb->mregs, MUSB_POWER, val);
|
||||
}
|
||||
mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
|
||||
break;
|
||||
|
||||
default:
|
||||
DBG(1, "%s state not handled\n", otg_state_string(musb));
|
||||
break;
|
||||
}
|
||||
spin_unlock_irqrestore(&musb->lock, flags);
|
||||
|
||||
DBG(4, "state is %s\n", otg_state_string(musb));
|
||||
}
|
||||
|
||||
void musb_platform_enable(struct musb *musb)
|
||||
{
|
||||
if (is_host_enabled(musb)) {
|
||||
mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
|
||||
musb->a_wait_bcon = TIMER_DELAY;
|
||||
}
|
||||
}
|
||||
|
||||
void musb_platform_disable(struct musb *musb)
|
||||
{
|
||||
}
|
||||
|
||||
static void bfin_vbus_power(struct musb *musb, int is_on, int sleeping)
|
||||
{
|
||||
}
|
||||
|
||||
static void bfin_set_vbus(struct musb *musb, int is_on)
|
||||
{
|
||||
if (is_on)
|
||||
gpio_set_value(musb->config->gpio_vrsel, 1);
|
||||
else
|
||||
gpio_set_value(musb->config->gpio_vrsel, 0);
|
||||
|
||||
DBG(1, "VBUS %s, devctl %02x "
|
||||
/* otg %3x conf %08x prcm %08x */ "\n",
|
||||
otg_state_string(musb),
|
||||
musb_readb(musb->mregs, MUSB_DEVCTL));
|
||||
}
|
||||
|
||||
static int bfin_set_power(struct otg_transceiver *x, unsigned mA)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
|
||||
{
|
||||
if (is_host_enabled(musb))
|
||||
mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY);
|
||||
}
|
||||
|
||||
int musb_platform_get_vbus_status(struct musb *musb)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
void musb_platform_set_mode(struct musb *musb, u8 musb_mode)
|
||||
{
|
||||
}
|
||||
|
||||
int __init musb_platform_init(struct musb *musb)
|
||||
{
|
||||
|
||||
/*
|
||||
* Rev 1.0 BF549 EZ-KITs require PE7 to be high for both DEVICE
|
||||
* and OTG HOST modes, while rev 1.1 and greater require PE7 to
|
||||
* be low for DEVICE mode and high for HOST mode. We set it high
|
||||
* here because we are in host mode
|
||||
*/
|
||||
|
||||
if (gpio_request(musb->config->gpio_vrsel, "USB_VRSEL")) {
|
||||
printk(KERN_ERR "Failed ro request USB_VRSEL GPIO_%d \n",
|
||||
musb->config->gpio_vrsel);
|
||||
return -ENODEV;
|
||||
}
|
||||
gpio_direction_output(musb->config->gpio_vrsel, 0);
|
||||
|
||||
/* Anomaly #05000346 */
|
||||
bfin_write_USB_APHY_CALIB(0x5411);
|
||||
SSYNC();
|
||||
|
||||
/* Anomaly #05000347 */
|
||||
bfin_write_USB_APHY_CNTRL(0x0);
|
||||
SSYNC();
|
||||
|
||||
/* TODO
|
||||
* Set SIC-IVG register
|
||||
*/
|
||||
|
||||
/* Configure PLL oscillator register */
|
||||
bfin_write_USB_PLLOSC_CTRL(0x30a8);
|
||||
SSYNC();
|
||||
|
||||
bfin_write_USB_SRP_CLKDIV((get_sclk()/1000) / 32 - 1);
|
||||
SSYNC();
|
||||
|
||||
bfin_write_USB_EP_NI0_RXMAXP(64);
|
||||
SSYNC();
|
||||
|
||||
bfin_write_USB_EP_NI0_TXMAXP(64);
|
||||
SSYNC();
|
||||
|
||||
/* Route INTRUSB/INTR_RX/INTR_TX to USB_INT0*/
|
||||
bfin_write_USB_GLOBINTR(0x7);
|
||||
SSYNC();
|
||||
|
||||
bfin_write_USB_GLOBAL_CTL(GLOBAL_ENA | EP1_TX_ENA | EP2_TX_ENA |
|
||||
EP3_TX_ENA | EP4_TX_ENA | EP5_TX_ENA |
|
||||
EP6_TX_ENA | EP7_TX_ENA | EP1_RX_ENA |
|
||||
EP2_RX_ENA | EP3_RX_ENA | EP4_RX_ENA |
|
||||
EP5_RX_ENA | EP6_RX_ENA | EP7_RX_ENA);
|
||||
SSYNC();
|
||||
|
||||
if (is_host_enabled(musb)) {
|
||||
musb->board_set_vbus = bfin_set_vbus;
|
||||
setup_timer(&musb_conn_timer,
|
||||
musb_conn_timer_handler, (unsigned long) musb);
|
||||
}
|
||||
if (is_peripheral_enabled(musb))
|
||||
musb->xceiv.set_power = bfin_set_power;
|
||||
|
||||
musb->isr = blackfin_interrupt;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int musb_platform_suspend(struct musb *musb)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
int musb_platform_resume(struct musb *musb)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int musb_platform_exit(struct musb *musb)
|
||||
{
|
||||
|
||||
bfin_vbus_power(musb, 0 /*off*/, 1);
|
||||
gpio_free(musb->config->gpio_vrsel);
|
||||
musb_platform_suspend(musb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
52
drivers/usb/musb/blackfin.h
Normal file
52
drivers/usb/musb/blackfin.h
Normal file
@ -0,0 +1,52 @@
|
||||
/*
|
||||
* Copyright (C) 2007 by Analog Devices, Inc.
|
||||
*
|
||||
* The Inventra Controller Driver for Linux is free software; you
|
||||
* can redistribute it and/or modify it under the terms of the GNU
|
||||
* General Public License version 2 as published by the Free Software
|
||||
* Foundation.
|
||||
*/
|
||||
|
||||
#ifndef __MUSB_BLACKFIN_H__
|
||||
#define __MUSB_BLACKFIN_H__
|
||||
|
||||
/*
|
||||
* Blackfin specific definitions
|
||||
*/
|
||||
|
||||
#undef DUMP_FIFO_DATA
|
||||
#ifdef DUMP_FIFO_DATA
|
||||
static void dump_fifo_data(u8 *buf, u16 len)
|
||||
{
|
||||
u8 *tmp = buf;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
if (!(i % 16) && i)
|
||||
pr_debug("\n");
|
||||
pr_debug("%02x ", *tmp++);
|
||||
}
|
||||
pr_debug("\n");
|
||||
}
|
||||
#else
|
||||
#define dump_fifo_data(buf, len) do {} while (0)
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BF52x
|
||||
|
||||
#define USB_DMA_BASE USB_DMA_INTERRUPT
|
||||
#define USB_DMAx_CTRL 0x04
|
||||
#define USB_DMAx_ADDR_LOW 0x08
|
||||
#define USB_DMAx_ADDR_HIGH 0x0C
|
||||
#define USB_DMAx_COUNT_LOW 0x10
|
||||
#define USB_DMAx_COUNT_HIGH 0x14
|
||||
|
||||
#define USB_DMA_REG(ep, reg) (USB_DMA_BASE + 0x20 * ep + reg)
|
||||
#endif
|
||||
|
||||
/* Almost 1 second */
|
||||
#define TIMER_DELAY (1 * HZ)
|
||||
|
||||
static struct timer_list musb_conn_timer;
|
||||
|
||||
#endif /* __MUSB_BLACKFIN_H__ */
|
||||
Loading…
Reference in New Issue
Block a user