1550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi/* 2550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * MUSB OTG driver - support for Mentor's DMA controller 3550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * 4550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * Copyright 2005 Mentor Graphics Corporation 5550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * Copyright (C) 2005-2007 by Texas Instruments 6550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * 7550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * This program is free software; you can redistribute it and/or 8550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * modify it under the terms of the GNU General Public License 9550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * version 2 as published by the Free Software Foundation. 10550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * 11550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * This program is distributed in the hope that it will be useful, but 12550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * WITHOUT ANY WARRANTY; without even the implied warranty of 13550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * General Public License for more details. 15550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * 16550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * You should have received a copy of the GNU General Public License 17550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * along with this program; if not, write to the Free Software 18550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 19550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * 02110-1301 USA 20550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * 21550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 22550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 24550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 27550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 28550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi * 32550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi */ 33550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#include <linux/device.h> 34550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#include <linux/interrupt.h> 35550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#include <linux/platform_device.h> 365a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 37550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#include "musb_core.h" 386995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu#include "musbhsdma.h" 39550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 40550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic int dma_controller_start(struct dma_controller *c) 41550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 42550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* nothing to do */ 43550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return 0; 44550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 45550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 46458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic void dma_channel_release(struct dma_channel *channel); 47550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 48550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic int dma_controller_stop(struct dma_controller *c) 49550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 50458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = container_of(c, 51458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller, controller); 52458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb *musb = controller->private_data; 53458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel *channel; 54458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bit; 55550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 56458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (controller->used_channels != 0) { 57550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(musb->controller, 58550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi "Stopping DMA controller while channel active\n"); 59550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 60458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi for (bit = 0; bit < MUSB_HSDMA_CHANNELS; bit++) { 61458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (controller->used_channels & (1 << bit)) { 62458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel = &controller->channel[bit].channel; 63458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi dma_channel_release(channel); 64550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 65458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (!controller->used_channels) 66550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi break; 67550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 68550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 69550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 70458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 71550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return 0; 72550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 73550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 74550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic struct dma_channel *dma_channel_allocate(struct dma_controller *c, 75550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct musb_hw_ep *hw_ep, u8 transmit) 76550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 77458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = container_of(c, 78458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller, controller); 79458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = NULL; 80458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel *channel = NULL; 81458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bit; 82458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 83458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi for (bit = 0; bit < MUSB_HSDMA_CHANNELS; bit++) { 84458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (!(controller->used_channels & (1 << bit))) { 85458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->used_channels |= (1 << bit); 86458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel = &(controller->channel[bit]); 87458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->controller = controller; 88458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->idx = bit; 89458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum = hw_ep->epnum; 90458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->transmit = transmit; 91458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel = &(musb_channel->channel); 92458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->private_data = musb_channel; 93458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 946587cc0f30cd2f27cf0677e470f18792925a23a4Anil Shetty channel->max_len = 0x100000; 95550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* Tx => mode 1; Rx => mode 0 */ 96458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->desired_mode = transmit; 97458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = 0; 98550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi break; 99550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 100550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 101458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 102458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi return channel; 103550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 104550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 105458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic void dma_channel_release(struct dma_channel *channel) 106550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 107458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 108550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 109458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = 0; 110458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->start_addr = 0; 111458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len = 0; 112550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 113458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->controller->used_channels &= 114458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi ~(1 << musb_channel->idx); 115550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 116458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_UNKNOWN; 117550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 118550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 119458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic void configure_channel(struct dma_channel *channel, 120550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 packet_sz, u8 mode, 121550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dma_addr_t dma_addr, u32 len) 122550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 123458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 124458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = musb_channel->controller; 1255c8a86e10a7c164f44537fabdc169fd8b4e7a440Felipe Balbi struct musb *musb = controller->private_data; 126458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = controller->base; 127458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel = musb_channel->idx; 128550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 csr = 0; 129550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 1305c8a86e10a7c164f44537fabdc169fd8b4e7a440Felipe Balbi dev_dbg(musb->controller, "%p, pkt_sz %d, addr 0x%x, len %d, mode %d\n", 131458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel, packet_sz, dma_addr, len, mode); 132550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 133550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (mode) { 134550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr |= 1 << MUSB_HSDMA_MODE1_SHIFT; 135550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi BUG_ON(len < packet_sz); 136550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 137c0f1f8e38fda8e345cad9269c559b4f036378120Hema HK csr |= MUSB_HSDMA_BURSTMODE_INCR16 138c0f1f8e38fda8e345cad9269c559b4f036378120Hema HK << MUSB_HSDMA_BURSTMODE_SHIFT; 139550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 140458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi csr |= (musb_channel->epnum << MUSB_HSDMA_ENDPOINT_SHIFT) 141550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi | (1 << MUSB_HSDMA_ENABLE_SHIFT) 142550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi | (1 << MUSB_HSDMA_IRQENABLE_SHIFT) 143458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi | (musb_channel->transmit 144550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi ? (1 << MUSB_HSDMA_TRANSMIT_SHIFT) 145550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi : 0); 146550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 147550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* address/count */ 1486995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_addr(mbase, bchannel, dma_addr); 1496995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_count(mbase, bchannel, len); 150550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 151550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* control (this should start things) */ 152550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 153458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL), 154550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr); 155550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 156550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 157458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic int dma_channel_program(struct dma_channel *channel, 158550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 packet_sz, u8 mode, 159550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dma_addr_t dma_addr, u32 len) 160550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 161458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 1626e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar struct musb_dma_controller *controller = musb_channel->controller; 1636e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar struct musb *musb = controller->private_data; 164550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 1655c8a86e10a7c164f44537fabdc169fd8b4e7a440Felipe Balbi dev_dbg(musb->controller, "ep%d-%s pkt_sz %d, dma_addr 0x%x length %d, mode %d\n", 166458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum, 167458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->transmit ? "Tx" : "Rx", 168550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi packet_sz, dma_addr, len, mode); 169550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 170458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN || 171458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status == MUSB_DMA_STATUS_BUSY); 172550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 173132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger /* Let targets check/tweak the arguments */ 174132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger if (musb->ops->adjust_channel_params) { 175132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger int ret = musb->ops->adjust_channel_params(channel, 176132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger packet_sz, &mode, &dma_addr, &len); 177132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger if (ret) 178132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger return ret; 179132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger } 180132543074af3cf1e94e3608abf162880edbdcbb3Mike Frysinger 1816e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar /* 1826e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar * The DMA engine in RTL1.8 and above cannot handle 1836e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar * DMA addresses that are not aligned to a 4 byte boundary. 1846e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar * It ends up masking the last two bits of the address 1856e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar * programmed in DMA_ADDR. 1866e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar * 1876e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar * Fail such DMA transfers, so that the backup PIO mode 1886e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar * can carry out the transfer 1896e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar */ 1906e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar if ((musb->hwvers >= MUSB_HWVERS_1800) && (dma_addr % 4)) 1916e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar return false; 1926e16edfe62eb49274c8a74dc04d1c6f315f8f82bAnand Gadiyar 193458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = 0; 194458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->start_addr = dma_addr; 195458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len = len; 196458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->max_packet_sz = packet_sz; 197458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_BUSY; 198550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 1998ca47c8a7621835914c053caaec74e66147dd7dcAnand Gadiyar configure_channel(channel, packet_sz, mode, dma_addr, len); 200550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 201550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return true; 202550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 203550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 204458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic int dma_channel_abort(struct dma_channel *channel) 205550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 206458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 207458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = musb_channel->controller->base; 208458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 209458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel = musb_channel->idx; 210b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov int offset; 211550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 csr; 212550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 213458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (channel->status == MUSB_DMA_STATUS_BUSY) { 214458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (musb_channel->transmit) { 215b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov offset = MUSB_EP_OFFSET(musb_channel->epnum, 216b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov MUSB_TXCSR); 217b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov 218b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov /* 219b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * The programming guide says that we must clear 220b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * the DMAENAB bit before the DMAMODE bit... 221b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov */ 222b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr = musb_readw(mbase, offset); 223b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAENAB); 224b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, csr); 225b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr &= ~MUSB_TXCSR_DMAMODE; 226b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, csr); 227550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } else { 228b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov offset = MUSB_EP_OFFSET(musb_channel->epnum, 229b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov MUSB_RXCSR); 230b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov 231b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr = musb_readw(mbase, offset); 232550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr &= ~(MUSB_RXCSR_AUTOCLEAR | 233550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_RXCSR_DMAENAB | 234550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_RXCSR_DMAMODE); 235b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, csr); 236550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 237550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 238550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 239458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL), 240550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 0); 2416995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_addr(mbase, bchannel, 0); 2426995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_count(mbase, bchannel, 0); 243458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 244550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 245458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 246550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return 0; 247550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 248550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 249550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic irqreturn_t dma_controller_irq(int irq, void *private_data) 250550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 251458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = private_data; 252458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb *musb = controller->private_data; 253458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel; 254458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel *channel; 255458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 256458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = controller->base; 257458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 258550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi irqreturn_t retval = IRQ_NONE; 259458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 260550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi unsigned long flags; 261550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 262458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel; 263458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 int_hsdma; 264458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 265f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar u32 addr, count; 266458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u16 csr; 267458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 268550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi spin_lock_irqsave(&musb->lock, flags); 269550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 270550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR); 271550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 2726bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai#ifdef CONFIG_BLACKFIN 2736bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai /* Clear DMA interrupt flags */ 2746bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai musb_writeb(mbase, MUSB_HSDMA_INTR, int_hsdma); 2756bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai#endif 2766bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai 277f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (!int_hsdma) { 2785c8a86e10a7c164f44537fabdc169fd8b4e7a440Felipe Balbi dev_dbg(musb->controller, "spurious DMA irq\n"); 279f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 280f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) { 281f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar musb_channel = (struct musb_dma_channel *) 282f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar &(controller->channel[bchannel]); 283f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar channel = &musb_channel->channel; 284f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (channel->status == MUSB_DMA_STATUS_BUSY) { 285f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar count = musb_read_hsdma_count(mbase, bchannel); 286f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 287f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (count == 0) 288f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar int_hsdma |= (1 << bchannel); 289f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar } 290f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar } 291f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 2925c8a86e10a7c164f44537fabdc169fd8b4e7a440Felipe Balbi dev_dbg(musb->controller, "int_hsdma = 0x%x\n", int_hsdma); 293f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 294f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (!int_hsdma) 295f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar goto done; 296f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar } 297f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 298458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) { 299458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (int_hsdma & (1 << bchannel)) { 300458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel = (struct musb_dma_channel *) 301458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi &(controller->channel[bchannel]); 302458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel = &musb_channel->channel; 303550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 304550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr = musb_readw(mbase, 305458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, 306550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_HSDMA_CONTROL)); 307550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 308458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (csr & (1 << MUSB_HSDMA_BUSERROR_SHIFT)) { 309458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->channel.status = 310550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_DMA_STATUS_BUS_ABORT; 311458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi } else { 312550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u8 devctl; 313550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 3146995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu addr = musb_read_hsdma_addr(mbase, 3156995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu bchannel); 316458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = addr 317458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi - musb_channel->start_addr; 318550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 3195c8a86e10a7c164f44537fabdc169fd8b4e7a440Felipe Balbi dev_dbg(musb->controller, "ch %p, 0x%x -> 0x%x (%zu / %d) %s\n", 320458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel, musb_channel->start_addr, 321458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi addr, channel->actual_len, 322458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len, 323458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi (channel->actual_len 324458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi < musb_channel->len) ? 325550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi "=> reconfig 0" : "=> complete"); 326550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 327550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi devctl = musb_readb(mbase, MUSB_DEVCTL); 328550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 329458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 330550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 331550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* completed */ 332550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if ((devctl & MUSB_DEVCTL_HM) 333458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi && (musb_channel->transmit) 334458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi && ((channel->desired_mode == 0) 335458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi || (channel->actual_len & 336458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi (musb_channel->max_packet_sz - 1))) 337b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov ) { 338b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov u8 epnum = musb_channel->epnum; 339b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov int offset = MUSB_EP_OFFSET(epnum, 340b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov MUSB_TXCSR); 341b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov u16 txcsr; 342b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov 343b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov /* 344b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * The programming guide says that we 345b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * must clear DMAENAB before DMAMODE. 346b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov */ 347b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_ep_select(mbase, epnum); 348b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr = musb_readw(mbase, offset); 349b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr &= ~(MUSB_TXCSR_DMAENAB 350b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov | MUSB_TXCSR_AUTOSET); 351b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, txcsr); 352550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* Send out the packet */ 353b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr &= ~MUSB_TXCSR_DMAMODE; 354b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr |= MUSB_TXCSR_TXPKTRDY; 355b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, txcsr); 356458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi } 357c7bbc056a92476b3b3d70a8df7cc746ac5d56de7Sergei Shtylyov musb_dma_completion(musb, musb_channel->epnum, 358c7bbc056a92476b3b3d70a8df7cc746ac5d56de7Sergei Shtylyov musb_channel->transmit); 359550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 360550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 361550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 3626995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu 363550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi retval = IRQ_HANDLED; 364550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbidone: 365550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi spin_unlock_irqrestore(&musb->lock, flags); 366550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return retval; 367550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 368550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 369550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbivoid dma_controller_destroy(struct dma_controller *c) 370550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 371458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = container_of(c, 372458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller, controller); 373550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 374550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (!controller) 375550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return; 376550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 377550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (controller->irq) 378550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi free_irq(controller->irq, c); 379550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 380550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi kfree(controller); 381550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 382550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 383550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistruct dma_controller *__init 384458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbidma_controller_create(struct musb *musb, void __iomem *base) 385550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 386550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct musb_dma_controller *controller; 387550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct device *dev = musb->controller; 388550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct platform_device *pdev = to_platform_device(dev); 389fcf173e4511193b1efeccb0f22a8c641b464353bHema Kalliguddi int irq = platform_get_irq_byname(pdev, "dma"); 390550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 391550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (irq == 0) { 392550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(dev, "No DMA interrupt line!\n"); 393550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 394550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 395550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 396458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller = kzalloc(sizeof(*controller), GFP_KERNEL); 397550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (!controller) 398550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 399550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 400458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->channel_count = MUSB_HSDMA_CHANNELS; 401458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->private_data = musb; 402458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->base = base; 403550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 404458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.start = dma_controller_start; 405458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.stop = dma_controller_stop; 406458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_alloc = dma_channel_allocate; 407458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_release = dma_channel_release; 408458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_program = dma_channel_program; 409458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_abort = dma_channel_abort; 410550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 411b5dd18d8747010e3f3eb1cc76a49f94291938559Yong Zhang if (request_irq(irq, dma_controller_irq, 0, 412427c4f333474f5447f62387c1fb060e586c1a781Kay Sievers dev_name(musb->controller), &controller->controller)) { 413550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(dev, "request_irq %d failed!\n", irq); 414458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi dma_controller_destroy(&controller->controller); 415458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 416550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 417550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 418550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 419550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi controller->irq = irq; 420550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 421458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi return &controller->controller; 422550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 423