musbhsdma.c revision 427c4f333474f5447f62387c1fb060e586c1a781
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> 36550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#include "musb_core.h" 37550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 38550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430) 39550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#include "omap2430.h" 40550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#endif 41550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 42550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BASE 0x200 43550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) 44550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_CONTROL 0x4 45550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_ADDRESS 0x8 46550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_COUNT 0xc 47550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 48458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ 49458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset) 50550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 51550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi/* control register (16-bit): */ 52550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_ENABLE_SHIFT 0 53550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_TRANSMIT_SHIFT 1 54550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_MODE1_SHIFT 2 55550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_IRQENABLE_SHIFT 3 56550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_ENDPOINT_SHIFT 4 57550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BUSERROR_SHIFT 8 58550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BURSTMODE_SHIFT 9 59550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT) 60550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BURSTMODE_UNSPEC 0 61550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BURSTMODE_INCR4 1 62550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BURSTMODE_INCR8 2 63550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_BURSTMODE_INCR16 3 64550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 65550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi#define MUSB_HSDMA_CHANNELS 8 66550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 67550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistruct musb_dma_controller; 68550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 69550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistruct musb_dma_channel { 70458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel channel; 71550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct musb_dma_controller *controller; 72458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u32 start_addr; 73550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u32 len; 74458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u16 max_packet_sz; 75458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 idx; 76550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u8 epnum; 77550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u8 transmit; 78550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi}; 79550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 80550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistruct musb_dma_controller { 81458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_controller controller; 82458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS]; 83458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void *private_data; 84458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *base; 85458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 channel_count; 86458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 used_channels; 87550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u8 irq; 88550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi}; 89550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 90550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic int dma_controller_start(struct dma_controller *c) 91550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 92550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* nothing to do */ 93550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return 0; 94550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 95550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 96458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic void dma_channel_release(struct dma_channel *channel); 97550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 98550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic int dma_controller_stop(struct dma_controller *c) 99550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 100458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = container_of(c, 101458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller, controller); 102458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb *musb = controller->private_data; 103458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel *channel; 104458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bit; 105550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 106458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (controller->used_channels != 0) { 107550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(musb->controller, 108550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi "Stopping DMA controller while channel active\n"); 109550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 110458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi for (bit = 0; bit < MUSB_HSDMA_CHANNELS; bit++) { 111458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (controller->used_channels & (1 << bit)) { 112458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel = &controller->channel[bit].channel; 113458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi dma_channel_release(channel); 114550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 115458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (!controller->used_channels) 116550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi break; 117550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 118550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 119550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 120458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 121550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return 0; 122550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 123550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 124550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic struct dma_channel *dma_channel_allocate(struct dma_controller *c, 125550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct musb_hw_ep *hw_ep, u8 transmit) 126550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 127458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = container_of(c, 128458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller, controller); 129458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = NULL; 130458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel *channel = NULL; 131458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bit; 132458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 133458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi for (bit = 0; bit < MUSB_HSDMA_CHANNELS; bit++) { 134458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (!(controller->used_channels & (1 << bit))) { 135458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->used_channels |= (1 << bit); 136458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel = &(controller->channel[bit]); 137458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->controller = controller; 138458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->idx = bit; 139458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum = hw_ep->epnum; 140458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->transmit = transmit; 141458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel = &(musb_channel->channel); 142458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->private_data = musb_channel; 143458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 144458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->max_len = 0x10000; 145550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* Tx => mode 1; Rx => mode 0 */ 146458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->desired_mode = transmit; 147458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = 0; 148550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi break; 149550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 150550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 151458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 152458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi return channel; 153550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 154550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 155458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic void dma_channel_release(struct dma_channel *channel) 156550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 157458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 158550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 159458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = 0; 160458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->start_addr = 0; 161458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len = 0; 162550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 163458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->controller->used_channels &= 164458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi ~(1 << musb_channel->idx); 165550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 166458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_UNKNOWN; 167550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 168550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 169458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic void configure_channel(struct dma_channel *channel, 170550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 packet_sz, u8 mode, 171550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dma_addr_t dma_addr, u32 len) 172550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 173458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 174458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = musb_channel->controller; 175458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = controller->base; 176458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel = musb_channel->idx; 177550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 csr = 0; 178550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 179550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi DBG(4, "%p, pkt_sz %d, addr 0x%x, len %d, mode %d\n", 180458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel, packet_sz, dma_addr, len, mode); 181550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 182550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (mode) { 183550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr |= 1 << MUSB_HSDMA_MODE1_SHIFT; 184550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi BUG_ON(len < packet_sz); 185550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 186550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (packet_sz >= 64) { 187550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr |= MUSB_HSDMA_BURSTMODE_INCR16 188550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi << MUSB_HSDMA_BURSTMODE_SHIFT; 189550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } else if (packet_sz >= 32) { 190550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr |= MUSB_HSDMA_BURSTMODE_INCR8 191550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi << MUSB_HSDMA_BURSTMODE_SHIFT; 192550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } else if (packet_sz >= 16) { 193550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr |= MUSB_HSDMA_BURSTMODE_INCR4 194550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi << MUSB_HSDMA_BURSTMODE_SHIFT; 195550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 196550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 197550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 198458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi csr |= (musb_channel->epnum << MUSB_HSDMA_ENDPOINT_SHIFT) 199550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi | (1 << MUSB_HSDMA_ENABLE_SHIFT) 200550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi | (1 << MUSB_HSDMA_IRQENABLE_SHIFT) 201458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi | (musb_channel->transmit 202550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi ? (1 << MUSB_HSDMA_TRANSMIT_SHIFT) 203550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi : 0); 204550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 205550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* address/count */ 206550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writel(mbase, 207458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), 208550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dma_addr); 209550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writel(mbase, 210458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), 211550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi len); 212550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 213550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* control (this should start things) */ 214550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 215458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL), 216550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr); 217550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 218550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 219458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic int dma_channel_program(struct dma_channel *channel, 220550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 packet_sz, u8 mode, 221550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dma_addr_t dma_addr, u32 len) 222550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 223458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 224550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 225550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi DBG(2, "ep%d-%s pkt_sz %d, dma_addr 0x%x length %d, mode %d\n", 226458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum, 227458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->transmit ? "Tx" : "Rx", 228550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi packet_sz, dma_addr, len, mode); 229550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 230458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN || 231458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status == MUSB_DMA_STATUS_BUSY); 232550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 233458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = 0; 234458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->start_addr = dma_addr; 235458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len = len; 236458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->max_packet_sz = packet_sz; 237458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_BUSY; 238550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 239550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if ((mode == 1) && (len >= packet_sz)) 240458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi configure_channel(channel, packet_sz, 1, dma_addr, len); 241550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi else 242458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi configure_channel(channel, packet_sz, 0, dma_addr, len); 243550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 244550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return true; 245550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 246550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 247458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbistatic int dma_channel_abort(struct dma_channel *channel) 248550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 249458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel = channel->private_data; 250458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = musb_channel->controller->base; 251458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 252458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel = musb_channel->idx; 253550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u16 csr; 254550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 255458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (channel->status == MUSB_DMA_STATUS_BUSY) { 256458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (musb_channel->transmit) { 257550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 258550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr = musb_readw(mbase, 259458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_EP_OFFSET(musb_channel->epnum, 260550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_TXCSR)); 261550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr &= ~(MUSB_TXCSR_AUTOSET | 262550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_TXCSR_DMAENAB | 263550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_TXCSR_DMAMODE); 264550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 265458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_EP_OFFSET(musb_channel->epnum, MUSB_TXCSR), 266550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr); 267550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } else { 268550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr = musb_readw(mbase, 269458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_EP_OFFSET(musb_channel->epnum, 270550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_RXCSR)); 271550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr &= ~(MUSB_RXCSR_AUTOCLEAR | 272550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_RXCSR_DMAENAB | 273550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_RXCSR_DMAMODE); 274550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 275458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_EP_OFFSET(musb_channel->epnum, MUSB_RXCSR), 276550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr); 277550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 278550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 279550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, 280458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL), 281550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 0); 282550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writel(mbase, 283458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), 284550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 0); 285550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writel(mbase, 286458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), 287550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 0); 288550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 289458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 290550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 291458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 292550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return 0; 293550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 294550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 295550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistatic irqreturn_t dma_controller_irq(int irq, void *private_data) 296550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 297458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = private_data; 298458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb *musb = controller->private_data; 299458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_channel *musb_channel; 300458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct dma_channel *channel; 301458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 302458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi void __iomem *mbase = controller->base; 303458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 304550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi irqreturn_t retval = IRQ_NONE; 305458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 306550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi unsigned long flags; 307550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 308458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 bchannel; 309458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u8 int_hsdma; 310458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 311458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u32 addr; 312458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi u16 csr; 313458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 314550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi spin_lock_irqsave(&musb->lock, flags); 315550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 316550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR); 317550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (!int_hsdma) 318550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi goto done; 319550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 320458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) { 321458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (int_hsdma & (1 << bchannel)) { 322458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel = (struct musb_dma_channel *) 323458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi &(controller->channel[bchannel]); 324458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel = &musb_channel->channel; 325550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 326550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi csr = musb_readw(mbase, 327458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET(bchannel, 328550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_HSDMA_CONTROL)); 329550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 330458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi if (csr & (1 << MUSB_HSDMA_BUSERROR_SHIFT)) { 331458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->channel.status = 332550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_DMA_STATUS_BUS_ABORT; 333458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi } else { 334550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi u8 devctl; 335550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 336458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi addr = musb_readl(mbase, 337550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_HSDMA_CHANNEL_OFFSET( 338458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi bchannel, 339550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_HSDMA_ADDRESS)); 340458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->actual_len = addr 341458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi - musb_channel->start_addr; 342550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 343550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi DBG(2, "ch %p, 0x%x -> 0x%x (%d / %d) %s\n", 344458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel, musb_channel->start_addr, 345458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi addr, channel->actual_len, 346458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->len, 347458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi (channel->actual_len 348458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi < musb_channel->len) ? 349550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi "=> reconfig 0" : "=> complete"); 350550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 351550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi devctl = musb_readb(mbase, MUSB_DEVCTL); 352550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 353458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi channel->status = MUSB_DMA_STATUS_FREE; 354550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 355550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* completed */ 356550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if ((devctl & MUSB_DEVCTL_HM) 357458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi && (musb_channel->transmit) 358458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi && ((channel->desired_mode == 0) 359458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi || (channel->actual_len & 360458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi (musb_channel->max_packet_sz - 1))) 361550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi ) { 362550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi /* Send out the packet */ 363550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_ep_select(mbase, 364458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum); 365550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_writew(mbase, MUSB_EP_OFFSET( 366458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum, 367550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_TXCSR), 368550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi MUSB_TXCSR_TXPKTRDY); 369458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi } else { 370550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb_dma_completion( 371550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi musb, 372458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->epnum, 373458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi musb_channel->transmit); 374458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi } 375550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 376550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 377550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 378550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi retval = IRQ_HANDLED; 379550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbidone: 380550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi spin_unlock_irqrestore(&musb->lock, flags); 381550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return retval; 382550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 383550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 384550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbivoid dma_controller_destroy(struct dma_controller *c) 385550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 386458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller *controller = container_of(c, 387458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi struct musb_dma_controller, controller); 388550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 389550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (!controller) 390550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return; 391550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 392550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (controller->irq) 393550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi free_irq(controller->irq, c); 394550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 395550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi kfree(controller); 396550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 397550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 398550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbistruct dma_controller *__init 399458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbidma_controller_create(struct musb *musb, void __iomem *base) 400550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi{ 401550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct musb_dma_controller *controller; 402550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct device *dev = musb->controller; 403550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi struct platform_device *pdev = to_platform_device(dev); 404550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi int irq = platform_get_irq(pdev, 1); 405550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 406550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (irq == 0) { 407550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(dev, "No DMA interrupt line!\n"); 408550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 409550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 410550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 411458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller = kzalloc(sizeof(*controller), GFP_KERNEL); 412550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (!controller) 413550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 414550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 415458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->channel_count = MUSB_HSDMA_CHANNELS; 416458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->private_data = musb; 417458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->base = base; 418550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 419458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.start = dma_controller_start; 420458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.stop = dma_controller_stop; 421458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_alloc = dma_channel_allocate; 422458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_release = dma_channel_release; 423458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_program = dma_channel_program; 424458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi controller->controller.channel_abort = dma_channel_abort; 425550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 426550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi if (request_irq(irq, dma_controller_irq, IRQF_DISABLED, 427427c4f333474f5447f62387c1fb060e586c1a781Kay Sievers dev_name(musb->controller), &controller->controller)) { 428550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi dev_err(dev, "request_irq %d failed!\n", irq); 429458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi dma_controller_destroy(&controller->controller); 430458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi 431550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi return NULL; 432550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi } 433550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 434550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi controller->irq = irq; 435550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi 436458e6a511f9dc91e5af5e64740b0a5c9650a25fbFelipe Balbi return &controller->controller; 437550a7375fe720924241f0eb76e4a5c1a3eb8c32fFelipe Balbi} 438