musbhsdma.c revision c0f1f8e38fda8e345cad9269c559b4f036378120
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; 94458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->max_len = 0x10000; 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; 125458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = controller->base; 126458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel = musb_channel->idx; 127550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 csr = 0; 128550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 129550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi DBG(4, "%p, pkt_sz %d, addr 0x%x, len %d, mode %d\n", 130458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel, packet_sz, dma_addr, len, mode); 131550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 132550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (mode) { 133550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr |= 1 << MUSB_HSDMA_MODE1_SHIFT; 134550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi BUG_ON(len < packet_sz); 135550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 136c0f1f8e38fda8e345cad9269c559b4f036378120Hema HK csr |= MUSB_HSDMA_BURSTMODE_INCR16 137c0f1f8e38fda8e345cad9269c559b4f036378120Hema HK << MUSB_HSDMA_BURSTMODE_SHIFT; 138550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 139458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi csr |= (musb_channel->epnum << MUSB_HSDMA_ENDPOINT_SHIFT) 140550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi | (1 << MUSB_HSDMA_ENABLE_SHIFT) 141550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi | (1 << MUSB_HSDMA_IRQENABLE_SHIFT) 142458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi | (musb_channel->transmit 143550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi ? (1 << MUSB_HSDMA_TRANSMIT_SHIFT) 144550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi : 0); 145550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 146550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* address/count */ 1476995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_addr(mbase, bchannel, dma_addr); 1486995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_count(mbase, bchannel, len); 149550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 150550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* control (this should start things) */ 151550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 152458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL), 153550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr); 154550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 155550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 156458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic int dma_channel_program(struct dma_channel *channel, 157550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 packet_sz, u8 mode, 158550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dma_addr_t dma_addr, u32 len) 159550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 160458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 161550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 162550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi DBG(2, "ep%d-%s pkt_sz %d, dma_addr 0x%x length %d, mode %d\n", 163458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum, 164458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->transmit ? "Tx" : "Rx", 165550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi packet_sz, dma_addr, len, mode); 166550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 167458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN || 168458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status == MUSB_DMA_STATUS_BUSY); 169550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 170458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = 0; 171458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->start_addr = dma_addr; 172458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len = len; 173458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->max_packet_sz = packet_sz; 174458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_BUSY; 175550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 176550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if ((mode == 1) && (len >= packet_sz)) 177458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi configure_channel(channel, packet_sz, 1, dma_addr, len); 178550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi else 179458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi configure_channel(channel, packet_sz, 0, dma_addr, len); 180550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 181550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return true; 182550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 183550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 184458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic int dma_channel_abort(struct dma_channel *channel) 185550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 186458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 187458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = musb_channel->controller->base; 188458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 189458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel = musb_channel->idx; 190b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov int offset; 191550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 csr; 192550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 193458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (channel->status == MUSB_DMA_STATUS_BUSY) { 194458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (musb_channel->transmit) { 195b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov offset = MUSB_EP_OFFSET(musb_channel->epnum, 196b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov MUSB_TXCSR); 197b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov 198b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov /* 199b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * The programming guide says that we must clear 200b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * the DMAENAB bit before the DMAMODE bit... 201b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov */ 202b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr = musb_readw(mbase, offset); 203b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAENAB); 204b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, csr); 205b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr &= ~MUSB_TXCSR_DMAMODE; 206b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, csr); 207550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } else { 208b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov offset = MUSB_EP_OFFSET(musb_channel->epnum, 209b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov MUSB_RXCSR); 210b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov 211b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov csr = musb_readw(mbase, offset); 212550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr &= ~(MUSB_RXCSR_AUTOCLEAR | 213550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_RXCSR_DMAENAB | 214550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_RXCSR_DMAMODE); 215b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, csr); 216550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 217550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 218550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 219458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL), 220550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 0); 2216995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_addr(mbase, bchannel, 0); 2226995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu musb_write_hsdma_count(mbase, bchannel, 0); 223458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 224550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 225458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 226550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return 0; 227550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 228550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 229550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic irqreturn_t dma_controller_irq(int irq, void *private_data) 230550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 231458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = private_data; 232458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb *musb = controller->private_data; 233458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel; 234458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel *channel; 235458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 236458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = controller->base; 237458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 238550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi irqreturn_t retval = IRQ_NONE; 239458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 240550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi unsigned long flags; 241550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 242458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel; 243458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 int_hsdma; 244458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 245f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar u32 addr, count; 246458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u16 csr; 247458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 248550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi spin_lock_irqsave(&musb->lock, flags); 249550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 250550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR); 251550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 2526bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai#ifdef CONFIG_BLACKFIN 2536bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai /* Clear DMA interrupt flags */ 2546bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai musb_writeb(mbase, MUSB_HSDMA_INTR, int_hsdma); 2556bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai#endif 2566bd03e7b9d0f70928f9cd793326c28e4e08ffc96Cliff Cai 257f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (!int_hsdma) { 258f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar DBG(2, "spurious DMA irq\n"); 259f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 260f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) { 261f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar musb_channel = (struct musb_dma_channel *) 262f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar &(controller->channel[bchannel]); 263f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar channel = &musb_channel->channel; 264f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (channel->status == MUSB_DMA_STATUS_BUSY) { 265f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar count = musb_read_hsdma_count(mbase, bchannel); 266f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 267f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (count == 0) 268f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar int_hsdma |= (1 << bchannel); 269f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar } 270f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar } 271f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 272f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar DBG(2, "int_hsdma = 0x%x\n", int_hsdma); 273f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 274f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar if (!int_hsdma) 275f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar goto done; 276f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar } 277f933a0c0fe0ea5f49a35bcd45e3e4850e0606cbaAnand Gadiyar 278458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) { 279458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (int_hsdma & (1 << bchannel)) { 280458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel = (struct musb_dma_channel *) 281458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi &(controller->channel[bchannel]); 282458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel = &musb_channel->channel; 283550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 284550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr = musb_readw(mbase, 285458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, 286550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_HSDMA_CONTROL)); 287550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 288458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (csr & (1 << MUSB_HSDMA_BUSERROR_SHIFT)) { 289458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->channel.status = 290550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_DMA_STATUS_BUS_ABORT; 291458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi } else { 292550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u8 devctl; 293550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 2946995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu addr = musb_read_hsdma_addr(mbase, 2956995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu bchannel); 296458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = addr 297458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi - musb_channel->start_addr; 298550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 29932340d3f75dba732a0545173ac65aab6fc3d4952Mike Frysinger DBG(2, "ch %p, 0x%x -> 0x%x (%zu / %d) %s\n", 300458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel, musb_channel->start_addr, 301458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi addr, channel->actual_len, 302458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len, 303458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi (channel->actual_len 304458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi < musb_channel->len) ? 305550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi "=> reconfig 0" : "=> complete"); 306550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 307550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi devctl = musb_readb(mbase, MUSB_DEVCTL); 308550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 309458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 310550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 311550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* completed */ 312550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if ((devctl & MUSB_DEVCTL_HM) 313458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi && (musb_channel->transmit) 314458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi && ((channel->desired_mode == 0) 315458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi || (channel->actual_len & 316458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi (musb_channel->max_packet_sz - 1))) 317b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov ) { 318b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov u8 epnum = musb_channel->epnum; 319b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov int offset = MUSB_EP_OFFSET(epnum, 320b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov MUSB_TXCSR); 321b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov u16 txcsr; 322b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov 323b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov /* 324b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * The programming guide says that we 325b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov * must clear DMAENAB before DMAMODE. 326b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov */ 327b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_ep_select(mbase, epnum); 328b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr = musb_readw(mbase, offset); 329b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr &= ~(MUSB_TXCSR_DMAENAB 330b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov | MUSB_TXCSR_AUTOSET); 331b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, txcsr); 332550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* Send out the packet */ 333b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr &= ~MUSB_TXCSR_DMAMODE; 334b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov txcsr |= MUSB_TXCSR_TXPKTRDY; 335b6e434a5404b9ce8c285ea081b6ea5c523b29db4Sergei Shtylyov musb_writew(mbase, offset, txcsr); 336458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi } 337c7bbc056a92476b3b3d70a8df7cc746ac5d56de7Sergei Shtylyov musb_dma_completion(musb, musb_channel->epnum, 338c7bbc056a92476b3b3d70a8df7cc746ac5d56de7Sergei Shtylyov musb_channel->transmit); 339550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 340550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 341550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 3426995eb68aab70e79eedb710d7d6d1f22d8aea4a7Bryan Wu 343550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi retval = IRQ_HANDLED; 344550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbidone: 345550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi spin_unlock_irqrestore(&musb->lock, flags); 346550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return retval; 347550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 348550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 349550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbivoid dma_controller_destroy(struct dma_controller *c) 350550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 351458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = container_of(c, 352458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller, controller); 353550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 354550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (!controller) 355550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return; 356550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 357550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (controller->irq) 358550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi free_irq(controller->irq, c); 359550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 360550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi kfree(controller); 361550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 362550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 363550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistruct dma_controller *__init 364458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbidma_controller_create(struct musb *musb, void __iomem *base) 365550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 366550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct musb_dma_controller *controller; 367550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct device *dev = musb->controller; 368550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct platform_device *pdev = to_platform_device(dev); 369550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi int irq = platform_get_irq(pdev, 1); 370550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 371550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (irq == 0) { 372550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(dev, "No DMA interrupt line!\n"); 373550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 374550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 375550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 376458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller = kzalloc(sizeof(*controller), GFP_KERNEL); 377550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (!controller) 378550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 379550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 380458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->channel_count = MUSB_HSDMA_CHANNELS; 381458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->private_data = musb; 382458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->base = base; 383550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 384458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.start = dma_controller_start; 385458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.stop = dma_controller_stop; 386458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_alloc = dma_channel_allocate; 387458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_release = dma_channel_release; 388458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_program = dma_channel_program; 389458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_abort = dma_channel_abort; 390550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 391550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (request_irq(irq, dma_controller_irq, IRQF_DISABLED, 392427c4f333474f5447f62387c1fb060e586c1a781Kay Sievers dev_name(musb->controller), &controller->controller)) { 393550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(dev, "request_irq %d failed!\n", irq); 394458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi dma_controller_destroy(&controller->controller); 395458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 396550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 397550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 398550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 399550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi controller->irq = irq; 400550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 401458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi return &controller->controller; 402550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 403