diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb/musbhsdma.c | 82 | ||||
| -rw-r--r-- | drivers/usb/musb/musbhsdma.h | 149 |
2 files changed, 162 insertions, 69 deletions
diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index d193b78..8662e9e 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -34,58 +34,7 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> #include "musb_core.h" - -#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430) -#include "omap2430.h" -#endif - -#define MUSB_HSDMA_BASE 0x200 -#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) -#define MUSB_HSDMA_CONTROL 0x4 -#define MUSB_HSDMA_ADDRESS 0x8 -#define MUSB_HSDMA_COUNT 0xc - -#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ - (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset) - -/* control register (16-bit): */ -#define MUSB_HSDMA_ENABLE_SHIFT 0 -#define MUSB_HSDMA_TRANSMIT_SHIFT 1 -#define MUSB_HSDMA_MODE1_SHIFT 2 -#define MUSB_HSDMA_IRQENABLE_SHIFT 3 -#define MUSB_HSDMA_ENDPOINT_SHIFT 4 -#define MUSB_HSDMA_BUSERROR_SHIFT 8 -#define MUSB_HSDMA_BURSTMODE_SHIFT 9 -#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT) -#define MUSB_HSDMA_BURSTMODE_UNSPEC 0 -#define MUSB_HSDMA_BURSTMODE_INCR4 1 -#define MUSB_HSDMA_BURSTMODE_INCR8 2 -#define MUSB_HSDMA_BURSTMODE_INCR16 3 - -#define MUSB_HSDMA_CHANNELS 8 - -struct musb_dma_controller; - -struct musb_dma_channel { - struct dma_channel channel; - struct musb_dma_controller *controller; - u32 start_addr; - u32 len; - u16 max_packet_sz; - u8 idx; - u8 epnum; - u8 transmit; -}; - -struct musb_dma_controller { - struct dma_controller controller; - struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS]; - void *private_data; - void __iomem *base; - u8 channel_count; - u8 used_channels; - u8 irq; -}; +#include "musbhsdma.h" static int dma_controller_start(struct dma_controller *c) { @@ -203,12 +152,8 @@ static void configure_channel(struct dma_channel *channel, : 0); /* address/count */ - musb_writel(mbase, - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), - dma_addr); - musb_writel(mbase, - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), - len); + musb_write_hsdma_addr(mbase, bchannel, dma_addr); + musb_write_hsdma_count(mbase, bchannel, len); /* control (this should start things) */ musb_writew(mbase, @@ -279,13 +224,8 @@ static int dma_channel_abort(struct dma_channel *channel) musb_writew(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL), 0); - musb_writel(mbase, - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), - 0); - musb_writel(mbase, - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), - 0); - + musb_write_hsdma_addr(mbase, bchannel, 0); + musb_write_hsdma_count(mbase, bchannel, 0); channel->status = MUSB_DMA_STATUS_FREE; } @@ -333,10 +273,8 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data) } else { u8 devctl; - addr = musb_readl(mbase, - MUSB_HSDMA_CHANNEL_OFFSET( - bchannel, - MUSB_HSDMA_ADDRESS)); + addr = musb_read_hsdma_addr(mbase, + bchannel); channel->actual_len = addr - musb_channel->start_addr; @@ -375,6 +313,12 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data) } } } + +#ifdef CONFIG_BLACKFIN + /* Clear DMA interrup flags */ + musb_writeb(mbase, MUSB_HSDMA_INTR, int_hsdma); +#endif + retval = IRQ_HANDLED; done: spin_unlock_irqrestore(&musb->lock, flags); diff --git a/drivers/usb/musb/musbhsdma.h b/drivers/usb/musb/musbhsdma.h new file mode 100644 index 0000000..1299d92 --- /dev/null +++ b/drivers/usb/musb/musbhsdma.h @@ -0,0 +1,149 @@ +/* + * MUSB OTG driver - support for Mentor's DMA controller + * + * Copyright 2005 Mentor Graphics Corporation + * Copyright (C) 2005-2007 by Texas Instruments + * + * This program 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. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430) +#include "omap2430.h" +#endif + +#ifndef CONFIG_BLACKFIN + +#define MUSB_HSDMA_BASE 0x200 +#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) +#define MUSB_HSDMA_CONTROL 0x4 +#define MUSB_HSDMA_ADDRESS 0x8 +#define MUSB_HSDMA_COUNT 0xc + +#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ + (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset) + +#define musb_read_hsdma_addr(mbase, bchannel) \ + musb_readl(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS)) + +#define musb_write_hsdma_addr(mbase, bchannel, addr) \ + musb_writel(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \ + addr) + +#define musb_write_hsdma_count(mbase, bchannel, len) \ + musb_writel(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \ + len) +#else + +#define MUSB_HSDMA_BASE 0x400 +#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) +#define MUSB_HSDMA_CONTROL 0x04 +#define MUSB_HSDMA_ADDR_LOW 0x08 +#define MUSB_HSDMA_ADDR_HIGH 0x0C +#define MUSB_HSDMA_COUNT_LOW 0x10 +#define MUSB_HSDMA_COUNT_HIGH 0x14 + +#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ + (MUSB_HSDMA_BASE + (_bchannel * 0x20) + _offset) + +static inline u32 musb_read_hsdma_addr(void __iomem *mbase, u8 bchannel) +{ + u32 addr = musb_readw(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH)); + + addr = addr << 16; + + addr |= musb_readw(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW)); + + return addr; +} + +static inline void musb_write_hsdma_addr(void __iomem *mbase, + u8 bchannel, dma_addr_t dma_addr) +{ + musb_writew(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW), + ((u16)((u32) dma_addr & 0xFFFF))); + musb_writew(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH), + ((u16)(((u32) dma_addr >> 16) & 0xFFFF))); +} + +static inline void musb_write_hsdma_count(void __iomem *mbase, + u8 bchannel, u32 len) +{ + musb_writew(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW), + ((u16)((u32) len & 0xFFFF))); + musb_writew(mbase, + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH), + ((u16)(((u32) len >> 16) & 0xFFFF))); +} + +#endif /* CONFIG_BLACKFIN */ + +/* control register (16-bit): */ +#define MUSB_HSDMA_ENABLE_SHIFT 0 +#define MUSB_HSDMA_TRANSMIT_SHIFT 1 +#define MUSB_HSDMA_MODE1_SHIFT 2 +#define MUSB_HSDMA_IRQENABLE_SHIFT 3 +#define MUSB_HSDMA_ENDPOINT_SHIFT 4 +#define MUSB_HSDMA_BUSERROR_SHIFT 8 +#define MUSB_HSDMA_BURSTMODE_SHIFT 9 +#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT) +#define MUSB_HSDMA_BURSTMODE_UNSPEC 0 +#define MUSB_HSDMA_BURSTMODE_INCR4 1 +#define MUSB_HSDMA_BURSTMODE_INCR8 2 +#define MUSB_HSDMA_BURSTMODE_INCR16 3 + +#define MUSB_HSDMA_CHANNELS 8 + +struct musb_dma_controller; + +struct musb_dma_channel { + struct dma_channel channel; + struct musb_dma_controller *controller; + u32 start_addr; + u32 len; + u16 max_packet_sz; + u8 idx; + u8 epnum; + u8 transmit; +}; + +struct musb_dma_controller { + struct dma_controller controller; + struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS]; + void *private_data; + void __iomem *base; + u8 channel_count; + u8 used_channels; + u8 irq; +}; |
