Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1 | /* |
| 2 | * MUSB OTG driver core code |
| 3 | * |
| 4 | * Copyright 2005 Mentor Graphics Corporation |
| 5 | * Copyright (C) 2005-2006 by Texas Instruments |
| 6 | * Copyright (C) 2006-2007 Nokia Corporation |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * version 2 as published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 20 | * 02110-1301 USA |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 25 | * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 26 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 27 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 28 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 29 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | /* |
| 36 | * Inventra (Multipoint) Dual-Role Controller Driver for Linux. |
| 37 | * |
| 38 | * This consists of a Host Controller Driver (HCD) and a peripheral |
| 39 | * controller driver implementing the "Gadget" API; OTG support is |
| 40 | * in the works. These are normal Linux-USB controller drivers which |
| 41 | * use IRQs and have no dedicated thread. |
| 42 | * |
| 43 | * This version of the driver has only been used with products from |
| 44 | * Texas Instruments. Those products integrate the Inventra logic |
| 45 | * with other DMA, IRQ, and bus modules, as well as other logic that |
| 46 | * needs to be reflected in this driver. |
| 47 | * |
| 48 | * |
| 49 | * NOTE: the original Mentor code here was pretty much a collection |
| 50 | * of mechanisms that don't seem to have been fully integrated/working |
| 51 | * for *any* Linux kernel version. This version aims at Linux 2.6.now, |
| 52 | * Key open issues include: |
| 53 | * |
| 54 | * - Lack of host-side transaction scheduling, for all transfer types. |
| 55 | * The hardware doesn't do it; instead, software must. |
| 56 | * |
| 57 | * This is not an issue for OTG devices that don't support external |
| 58 | * hubs, but for more "normal" USB hosts it's a user issue that the |
| 59 | * "multipoint" support doesn't scale in the expected ways. That |
| 60 | * includes DaVinci EVM in a common non-OTG mode. |
| 61 | * |
| 62 | * * Control and bulk use dedicated endpoints, and there's as |
| 63 | * yet no mechanism to either (a) reclaim the hardware when |
| 64 | * peripherals are NAKing, which gets complicated with bulk |
| 65 | * endpoints, or (b) use more than a single bulk endpoint in |
| 66 | * each direction. |
| 67 | * |
| 68 | * RESULT: one device may be perceived as blocking another one. |
| 69 | * |
| 70 | * * Interrupt and isochronous will dynamically allocate endpoint |
| 71 | * hardware, but (a) there's no record keeping for bandwidth; |
| 72 | * (b) in the common case that few endpoints are available, there |
| 73 | * is no mechanism to reuse endpoints to talk to multiple devices. |
| 74 | * |
| 75 | * RESULT: At one extreme, bandwidth can be overcommitted in |
| 76 | * some hardware configurations, no faults will be reported. |
| 77 | * At the other extreme, the bandwidth capabilities which do |
| 78 | * exist tend to be severely undercommitted. You can't yet hook |
| 79 | * up both a keyboard and a mouse to an external USB hub. |
| 80 | */ |
| 81 | |
| 82 | /* |
| 83 | * This gets many kinds of configuration information: |
| 84 | * - Kconfig for everything user-configurable |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 85 | * - platform_device for addressing, irq, and platform_data |
| 86 | * - platform_data is mostly for board-specific informarion |
David Brownell | c767c1c | 2008-09-11 11:53:23 +0300 | [diff] [blame] | 87 | * (plus recentrly, SOC or family details) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 88 | * |
| 89 | * Most of the conditional compilation will (someday) vanish. |
| 90 | */ |
| 91 | |
| 92 | #include <linux/module.h> |
| 93 | #include <linux/kernel.h> |
| 94 | #include <linux/sched.h> |
| 95 | #include <linux/slab.h> |
| 96 | #include <linux/init.h> |
| 97 | #include <linux/list.h> |
| 98 | #include <linux/kobject.h> |
Mike Frysinger | 9303961 | 2011-05-25 08:13:24 -0400 | [diff] [blame] | 99 | #include <linux/prefetch.h> |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 100 | #include <linux/platform_device.h> |
| 101 | #include <linux/io.h> |
| 102 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 103 | #include "musb_core.h" |
| 104 | |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 105 | #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 106 | |
| 107 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 108 | #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia" |
| 109 | #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver" |
| 110 | |
Felipe Balbi | e8164f6 | 2008-08-10 21:22:35 +0300 | [diff] [blame] | 111 | #define MUSB_VERSION "6.0" |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 112 | |
| 113 | #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION |
| 114 | |
Felipe Balbi | 05ac10d | 2010-12-02 08:49:26 +0200 | [diff] [blame] | 115 | #define MUSB_DRIVER_NAME "musb-hdrc" |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 116 | const char musb_driver_name[] = MUSB_DRIVER_NAME; |
| 117 | |
| 118 | MODULE_DESCRIPTION(DRIVER_INFO); |
| 119 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 120 | MODULE_LICENSE("GPL"); |
| 121 | MODULE_ALIAS("platform:" MUSB_DRIVER_NAME); |
| 122 | |
| 123 | |
| 124 | /*-------------------------------------------------------------------------*/ |
| 125 | |
| 126 | static inline struct musb *dev_to_musb(struct device *dev) |
| 127 | { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 128 | return dev_get_drvdata(dev); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | /*-------------------------------------------------------------------------*/ |
| 132 | |
Heikki Krogerus | ffb865b | 2010-03-25 13:25:28 +0200 | [diff] [blame] | 133 | #ifndef CONFIG_BLACKFIN |
| 134 | static int musb_ulpi_read(struct otg_transceiver *otg, u32 offset) |
| 135 | { |
| 136 | void __iomem *addr = otg->io_priv; |
| 137 | int i = 0; |
| 138 | u8 r; |
| 139 | u8 power; |
| 140 | |
| 141 | /* Make sure the transceiver is not in low power mode */ |
| 142 | power = musb_readb(addr, MUSB_POWER); |
| 143 | power &= ~MUSB_POWER_SUSPENDM; |
| 144 | musb_writeb(addr, MUSB_POWER, power); |
| 145 | |
| 146 | /* REVISIT: musbhdrc_ulpi_an.pdf recommends setting the |
| 147 | * ULPICarKitControlDisableUTMI after clearing POWER_SUSPENDM. |
| 148 | */ |
| 149 | |
| 150 | musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset); |
| 151 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, |
| 152 | MUSB_ULPI_REG_REQ | MUSB_ULPI_RDN_WR); |
| 153 | |
| 154 | while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL) |
| 155 | & MUSB_ULPI_REG_CMPLT)) { |
| 156 | i++; |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 157 | if (i == 10000) |
Heikki Krogerus | ffb865b | 2010-03-25 13:25:28 +0200 | [diff] [blame] | 158 | return -ETIMEDOUT; |
Heikki Krogerus | ffb865b | 2010-03-25 13:25:28 +0200 | [diff] [blame] | 159 | |
| 160 | } |
| 161 | r = musb_readb(addr, MUSB_ULPI_REG_CONTROL); |
| 162 | r &= ~MUSB_ULPI_REG_CMPLT; |
| 163 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r); |
| 164 | |
| 165 | return musb_readb(addr, MUSB_ULPI_REG_DATA); |
| 166 | } |
| 167 | |
| 168 | static int musb_ulpi_write(struct otg_transceiver *otg, |
| 169 | u32 offset, u32 data) |
| 170 | { |
| 171 | void __iomem *addr = otg->io_priv; |
| 172 | int i = 0; |
| 173 | u8 r = 0; |
| 174 | u8 power; |
| 175 | |
| 176 | /* Make sure the transceiver is not in low power mode */ |
| 177 | power = musb_readb(addr, MUSB_POWER); |
| 178 | power &= ~MUSB_POWER_SUSPENDM; |
| 179 | musb_writeb(addr, MUSB_POWER, power); |
| 180 | |
| 181 | musb_writeb(addr, MUSB_ULPI_REG_ADDR, (u8)offset); |
| 182 | musb_writeb(addr, MUSB_ULPI_REG_DATA, (u8)data); |
| 183 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, MUSB_ULPI_REG_REQ); |
| 184 | |
| 185 | while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL) |
| 186 | & MUSB_ULPI_REG_CMPLT)) { |
| 187 | i++; |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 188 | if (i == 10000) |
Heikki Krogerus | ffb865b | 2010-03-25 13:25:28 +0200 | [diff] [blame] | 189 | return -ETIMEDOUT; |
Heikki Krogerus | ffb865b | 2010-03-25 13:25:28 +0200 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | r = musb_readb(addr, MUSB_ULPI_REG_CONTROL); |
| 193 | r &= ~MUSB_ULPI_REG_CMPLT; |
| 194 | musb_writeb(addr, MUSB_ULPI_REG_CONTROL, r); |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | #else |
Mike Frysinger | f2263db | 2010-06-24 23:07:08 +0530 | [diff] [blame] | 199 | #define musb_ulpi_read NULL |
| 200 | #define musb_ulpi_write NULL |
Heikki Krogerus | ffb865b | 2010-03-25 13:25:28 +0200 | [diff] [blame] | 201 | #endif |
| 202 | |
| 203 | static struct otg_io_access_ops musb_ulpi_access = { |
| 204 | .read = musb_ulpi_read, |
| 205 | .write = musb_ulpi_write, |
| 206 | }; |
| 207 | |
| 208 | /*-------------------------------------------------------------------------*/ |
| 209 | |
Felipe Balbi | 7c92554 | 2010-12-01 14:23:48 +0200 | [diff] [blame] | 210 | #if !defined(CONFIG_USB_MUSB_TUSB6010) && !defined(CONFIG_USB_MUSB_BLACKFIN) |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 211 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 212 | /* |
| 213 | * Load an endpoint's FIFO |
| 214 | */ |
| 215 | void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src) |
| 216 | { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 217 | struct musb *musb = hw_ep->musb; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 218 | void __iomem *fifo = hw_ep->fifo; |
| 219 | |
| 220 | prefetch((u8 *)src); |
| 221 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 222 | dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n", |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 223 | 'T', hw_ep->epnum, fifo, len, src); |
| 224 | |
| 225 | /* we can't assume unaligned reads work */ |
| 226 | if (likely((0x01 & (unsigned long) src) == 0)) { |
| 227 | u16 index = 0; |
| 228 | |
| 229 | /* best case is 32bit-aligned source address */ |
| 230 | if ((0x02 & (unsigned long) src) == 0) { |
| 231 | if (len >= 4) { |
| 232 | writesl(fifo, src + index, len >> 2); |
| 233 | index += len & ~0x03; |
| 234 | } |
| 235 | if (len & 0x02) { |
| 236 | musb_writew(fifo, 0, *(u16 *)&src[index]); |
| 237 | index += 2; |
| 238 | } |
| 239 | } else { |
| 240 | if (len >= 2) { |
| 241 | writesw(fifo, src + index, len >> 1); |
| 242 | index += len & ~0x01; |
| 243 | } |
| 244 | } |
| 245 | if (len & 0x01) |
| 246 | musb_writeb(fifo, 0, src[index]); |
| 247 | } else { |
| 248 | /* byte aligned */ |
| 249 | writesb(fifo, src, len); |
| 250 | } |
| 251 | } |
| 252 | |
Ajay Kumar Gupta | 843bb1d | 2010-10-19 10:08:13 +0300 | [diff] [blame] | 253 | #if !defined(CONFIG_USB_MUSB_AM35X) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 254 | /* |
| 255 | * Unload an endpoint's FIFO |
| 256 | */ |
| 257 | void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst) |
| 258 | { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 259 | struct musb *musb = hw_ep->musb; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 260 | void __iomem *fifo = hw_ep->fifo; |
| 261 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 262 | dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n", |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 263 | 'R', hw_ep->epnum, fifo, len, dst); |
| 264 | |
| 265 | /* we can't assume unaligned writes work */ |
| 266 | if (likely((0x01 & (unsigned long) dst) == 0)) { |
| 267 | u16 index = 0; |
| 268 | |
| 269 | /* best case is 32bit-aligned destination address */ |
| 270 | if ((0x02 & (unsigned long) dst) == 0) { |
| 271 | if (len >= 4) { |
| 272 | readsl(fifo, dst, len >> 2); |
| 273 | index = len & ~0x03; |
| 274 | } |
| 275 | if (len & 0x02) { |
| 276 | *(u16 *)&dst[index] = musb_readw(fifo, 0); |
| 277 | index += 2; |
| 278 | } |
| 279 | } else { |
| 280 | if (len >= 2) { |
| 281 | readsw(fifo, dst, len >> 1); |
| 282 | index = len & ~0x01; |
| 283 | } |
| 284 | } |
| 285 | if (len & 0x01) |
| 286 | dst[index] = musb_readb(fifo, 0); |
| 287 | } else { |
| 288 | /* byte aligned */ |
| 289 | readsb(fifo, dst, len); |
| 290 | } |
| 291 | } |
Ajay Kumar Gupta | 843bb1d | 2010-10-19 10:08:13 +0300 | [diff] [blame] | 292 | #endif |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 293 | |
| 294 | #endif /* normal PIO */ |
| 295 | |
| 296 | |
| 297 | /*-------------------------------------------------------------------------*/ |
| 298 | |
| 299 | /* for high speed test mode; see USB 2.0 spec 7.1.20 */ |
| 300 | static const u8 musb_test_packet[53] = { |
| 301 | /* implicit SYNC then DATA0 to start */ |
| 302 | |
| 303 | /* JKJKJKJK x9 */ |
| 304 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 305 | /* JJKKJJKK x8 */ |
| 306 | 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, |
| 307 | /* JJJJKKKK x8 */ |
| 308 | 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, |
| 309 | /* JJJJJJJKKKKKKK x8 */ |
| 310 | 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 311 | /* JJJJJJJK x8 */ |
| 312 | 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, |
| 313 | /* JKKKKKKK x10, JK */ |
| 314 | 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e |
| 315 | |
| 316 | /* implicit CRC16 then EOP to end */ |
| 317 | }; |
| 318 | |
| 319 | void musb_load_testpacket(struct musb *musb) |
| 320 | { |
| 321 | void __iomem *regs = musb->endpoints[0].regs; |
| 322 | |
| 323 | musb_ep_select(musb->mregs, 0); |
| 324 | musb_write_fifo(musb->control_ep, |
| 325 | sizeof(musb_test_packet), musb_test_packet); |
| 326 | musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY); |
| 327 | } |
| 328 | |
| 329 | /*-------------------------------------------------------------------------*/ |
| 330 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 331 | /* |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 332 | * Handles OTG hnp timeouts, such as b_ase0_brst |
| 333 | */ |
| 334 | void musb_otg_timer_func(unsigned long data) |
| 335 | { |
| 336 | struct musb *musb = (struct musb *)data; |
| 337 | unsigned long flags; |
| 338 | |
| 339 | spin_lock_irqsave(&musb->lock, flags); |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 340 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 341 | case OTG_STATE_B_WAIT_ACON: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 342 | dev_dbg(musb->controller, "HNP: b_wait_acon timeout; back to b_peripheral\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 343 | musb_g_disconnect(musb); |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 344 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 345 | musb->is_active = 0; |
| 346 | break; |
David Brownell | ab983f2a | 2009-03-31 12:35:09 -0700 | [diff] [blame] | 347 | case OTG_STATE_A_SUSPEND: |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 348 | case OTG_STATE_A_WAIT_BCON: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 349 | dev_dbg(musb->controller, "HNP: %s timeout\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 350 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 351 | musb_platform_set_vbus(musb, 0); |
David Brownell | ab983f2a | 2009-03-31 12:35:09 -0700 | [diff] [blame] | 352 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 353 | break; |
| 354 | default: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 355 | dev_dbg(musb->controller, "HNP: Unhandled mode %s\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 356 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 357 | } |
| 358 | musb->ignore_disconnect = 0; |
| 359 | spin_unlock_irqrestore(&musb->lock, flags); |
| 360 | } |
| 361 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 362 | /* |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 363 | * Stops the HNP transition. Caller must take care of locking. |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 364 | */ |
| 365 | void musb_hnp_stop(struct musb *musb) |
| 366 | { |
| 367 | struct usb_hcd *hcd = musb_to_hcd(musb); |
| 368 | void __iomem *mbase = musb->mregs; |
| 369 | u8 reg; |
| 370 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 371 | dev_dbg(musb->controller, "HNP: stop from %s\n", otg_state_string(musb->xceiv->state)); |
David Brownell | ab983f2a | 2009-03-31 12:35:09 -0700 | [diff] [blame] | 372 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 373 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 374 | case OTG_STATE_A_PERIPHERAL: |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 375 | musb_g_disconnect(musb); |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 376 | dev_dbg(musb->controller, "HNP: back to %s\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 377 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 378 | break; |
| 379 | case OTG_STATE_B_HOST: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 380 | dev_dbg(musb->controller, "HNP: Disabling HR\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 381 | hcd->self.is_b_host = 0; |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 382 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 383 | MUSB_DEV_MODE(musb); |
| 384 | reg = musb_readb(mbase, MUSB_POWER); |
| 385 | reg |= MUSB_POWER_SUSPENDM; |
| 386 | musb_writeb(mbase, MUSB_POWER, reg); |
| 387 | /* REVISIT: Start SESSION_REQUEST here? */ |
| 388 | break; |
| 389 | default: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 390 | dev_dbg(musb->controller, "HNP: Stopping in unknown state %s\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 391 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | /* |
| 395 | * When returning to A state after HNP, avoid hub_port_rebounce(), |
| 396 | * which cause occasional OPT A "Did not receive reset after connect" |
| 397 | * errors. |
| 398 | */ |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 399 | musb->port1_status &= ~(USB_PORT_STAT_C_CONNECTION << 16); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 400 | } |
| 401 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 402 | /* |
| 403 | * Interrupt Service Routine to record USB "global" interrupts. |
| 404 | * Since these do not happen often and signify things of |
| 405 | * paramount importance, it seems OK to check them individually; |
| 406 | * the order of the tests is specified in the manual |
| 407 | * |
| 408 | * @param musb instance pointer |
| 409 | * @param int_usb register contents |
| 410 | * @param devctl |
| 411 | * @param power |
| 412 | */ |
| 413 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 414 | static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, |
| 415 | u8 devctl, u8 power) |
| 416 | { |
| 417 | irqreturn_t handled = IRQ_NONE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 418 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 419 | dev_dbg(musb->controller, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl, |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 420 | int_usb); |
| 421 | |
| 422 | /* in host mode, the peripheral may issue remote wakeup. |
| 423 | * in peripheral mode, the host may resume the link. |
| 424 | * spurious RESUME irqs happen too, paired with SUSPEND. |
| 425 | */ |
| 426 | if (int_usb & MUSB_INTR_RESUME) { |
| 427 | handled = IRQ_HANDLED; |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 428 | dev_dbg(musb->controller, "RESUME (%s)\n", otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 429 | |
| 430 | if (devctl & MUSB_DEVCTL_HM) { |
Felipe Balbi | aa47145 | 2010-03-12 10:27:24 +0200 | [diff] [blame] | 431 | void __iomem *mbase = musb->mregs; |
| 432 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 433 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 434 | case OTG_STATE_A_SUSPEND: |
| 435 | /* remote wakeup? later, GetPortStatus |
| 436 | * will stop RESUME signaling |
| 437 | */ |
| 438 | |
| 439 | if (power & MUSB_POWER_SUSPENDM) { |
| 440 | /* spurious */ |
| 441 | musb->int_usb &= ~MUSB_INTR_SUSPEND; |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 442 | dev_dbg(musb->controller, "Spurious SUSPENDM\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 443 | break; |
| 444 | } |
| 445 | |
| 446 | power &= ~MUSB_POWER_SUSPENDM; |
| 447 | musb_writeb(mbase, MUSB_POWER, |
| 448 | power | MUSB_POWER_RESUME); |
| 449 | |
| 450 | musb->port1_status |= |
| 451 | (USB_PORT_STAT_C_SUSPEND << 16) |
| 452 | | MUSB_PORT_STAT_RESUME; |
| 453 | musb->rh_timer = jiffies |
| 454 | + msecs_to_jiffies(20); |
| 455 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 456 | musb->xceiv->state = OTG_STATE_A_HOST; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 457 | musb->is_active = 1; |
| 458 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); |
| 459 | break; |
| 460 | case OTG_STATE_B_WAIT_ACON: |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 461 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 462 | musb->is_active = 1; |
| 463 | MUSB_DEV_MODE(musb); |
| 464 | break; |
| 465 | default: |
| 466 | WARNING("bogus %s RESUME (%s)\n", |
| 467 | "host", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 468 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 469 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 470 | } else { |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 471 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 472 | case OTG_STATE_A_SUSPEND: |
| 473 | /* possibly DISCONNECT is upcoming */ |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 474 | musb->xceiv->state = OTG_STATE_A_HOST; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 475 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); |
| 476 | break; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 477 | case OTG_STATE_B_WAIT_ACON: |
| 478 | case OTG_STATE_B_PERIPHERAL: |
| 479 | /* disconnect while suspended? we may |
| 480 | * not get a disconnect irq... |
| 481 | */ |
| 482 | if ((devctl & MUSB_DEVCTL_VBUS) |
| 483 | != (3 << MUSB_DEVCTL_VBUS_SHIFT) |
| 484 | ) { |
| 485 | musb->int_usb |= MUSB_INTR_DISCONNECT; |
| 486 | musb->int_usb &= ~MUSB_INTR_SUSPEND; |
| 487 | break; |
| 488 | } |
| 489 | musb_g_resume(musb); |
| 490 | break; |
| 491 | case OTG_STATE_B_IDLE: |
| 492 | musb->int_usb &= ~MUSB_INTR_SUSPEND; |
| 493 | break; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 494 | default: |
| 495 | WARNING("bogus %s RESUME (%s)\n", |
| 496 | "peripheral", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 497 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 498 | } |
| 499 | } |
| 500 | } |
| 501 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 502 | /* see manual for the order of the tests */ |
| 503 | if (int_usb & MUSB_INTR_SESSREQ) { |
Felipe Balbi | aa47145 | 2010-03-12 10:27:24 +0200 | [diff] [blame] | 504 | void __iomem *mbase = musb->mregs; |
| 505 | |
Heikki Krogerus | 19aab56 | 2010-10-29 04:23:27 -0500 | [diff] [blame] | 506 | if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS |
| 507 | && (devctl & MUSB_DEVCTL_BDEVICE)) { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 508 | dev_dbg(musb->controller, "SessReq while on B state\n"); |
Heikki Krogerus | a6038ee | 2010-09-24 13:44:13 +0300 | [diff] [blame] | 509 | return IRQ_HANDLED; |
| 510 | } |
| 511 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 512 | dev_dbg(musb->controller, "SESSION_REQUEST (%s)\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 513 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 514 | |
| 515 | /* IRQ arrives from ID pin sense or (later, if VBUS power |
| 516 | * is removed) SRP. responses are time critical: |
| 517 | * - turn on VBUS (with silicon-specific mechanism) |
| 518 | * - go through A_WAIT_VRISE |
| 519 | * - ... to A_WAIT_BCON. |
| 520 | * a_wait_vrise_tmout triggers VBUS_ERROR transitions |
| 521 | */ |
| 522 | musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); |
| 523 | musb->ep0_stage = MUSB_EP0_START; |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 524 | musb->xceiv->state = OTG_STATE_A_IDLE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 525 | MUSB_HST_MODE(musb); |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 526 | musb_platform_set_vbus(musb, 1); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 527 | |
| 528 | handled = IRQ_HANDLED; |
| 529 | } |
| 530 | |
| 531 | if (int_usb & MUSB_INTR_VBUSERROR) { |
| 532 | int ignore = 0; |
| 533 | |
| 534 | /* During connection as an A-Device, we may see a short |
| 535 | * current spikes causing voltage drop, because of cable |
| 536 | * and peripheral capacitance combined with vbus draw. |
| 537 | * (So: less common with truly self-powered devices, where |
| 538 | * vbus doesn't act like a power supply.) |
| 539 | * |
| 540 | * Such spikes are short; usually less than ~500 usec, max |
| 541 | * of ~2 msec. That is, they're not sustained overcurrent |
| 542 | * errors, though they're reported using VBUSERROR irqs. |
| 543 | * |
| 544 | * Workarounds: (a) hardware: use self powered devices. |
| 545 | * (b) software: ignore non-repeated VBUS errors. |
| 546 | * |
| 547 | * REVISIT: do delays from lots of DEBUG_KERNEL checks |
| 548 | * make trouble here, keeping VBUS < 4.4V ? |
| 549 | */ |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 550 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 551 | case OTG_STATE_A_HOST: |
| 552 | /* recovery is dicey once we've gotten past the |
| 553 | * initial stages of enumeration, but if VBUS |
| 554 | * stayed ok at the other end of the link, and |
| 555 | * another reset is due (at least for high speed, |
| 556 | * to redo the chirp etc), it might work OK... |
| 557 | */ |
| 558 | case OTG_STATE_A_WAIT_BCON: |
| 559 | case OTG_STATE_A_WAIT_VRISE: |
| 560 | if (musb->vbuserr_retry) { |
Felipe Balbi | aa47145 | 2010-03-12 10:27:24 +0200 | [diff] [blame] | 561 | void __iomem *mbase = musb->mregs; |
| 562 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 563 | musb->vbuserr_retry--; |
| 564 | ignore = 1; |
| 565 | devctl |= MUSB_DEVCTL_SESSION; |
| 566 | musb_writeb(mbase, MUSB_DEVCTL, devctl); |
| 567 | } else { |
| 568 | musb->port1_status |= |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 569 | USB_PORT_STAT_OVERCURRENT |
| 570 | | (USB_PORT_STAT_C_OVERCURRENT << 16); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 571 | } |
| 572 | break; |
| 573 | default: |
| 574 | break; |
| 575 | } |
| 576 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 577 | dev_dbg(musb->controller, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 578 | otg_state_string(musb->xceiv->state), |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 579 | devctl, |
| 580 | ({ char *s; |
| 581 | switch (devctl & MUSB_DEVCTL_VBUS) { |
| 582 | case 0 << MUSB_DEVCTL_VBUS_SHIFT: |
| 583 | s = "<SessEnd"; break; |
| 584 | case 1 << MUSB_DEVCTL_VBUS_SHIFT: |
| 585 | s = "<AValid"; break; |
| 586 | case 2 << MUSB_DEVCTL_VBUS_SHIFT: |
| 587 | s = "<VBusValid"; break; |
| 588 | /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */ |
| 589 | default: |
| 590 | s = "VALID"; break; |
| 591 | }; s; }), |
| 592 | VBUSERR_RETRY_COUNT - musb->vbuserr_retry, |
| 593 | musb->port1_status); |
| 594 | |
| 595 | /* go through A_WAIT_VFALL then start a new session */ |
| 596 | if (!ignore) |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 597 | musb_platform_set_vbus(musb, 0); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 598 | handled = IRQ_HANDLED; |
| 599 | } |
| 600 | |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 601 | if (int_usb & MUSB_INTR_SUSPEND) { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 602 | dev_dbg(musb->controller, "SUSPEND (%s) devctl %02x power %02x\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 603 | otg_state_string(musb->xceiv->state), devctl, power); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 604 | handled = IRQ_HANDLED; |
| 605 | |
| 606 | switch (musb->xceiv->state) { |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 607 | case OTG_STATE_A_PERIPHERAL: |
| 608 | /* We also come here if the cable is removed, since |
| 609 | * this silicon doesn't report ID-no-longer-grounded. |
| 610 | * |
| 611 | * We depend on T(a_wait_bcon) to shut us down, and |
| 612 | * hope users don't do anything dicey during this |
| 613 | * undesired detour through A_WAIT_BCON. |
| 614 | */ |
| 615 | musb_hnp_stop(musb); |
| 616 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); |
| 617 | musb_root_disconnect(musb); |
| 618 | musb_platform_try_idle(musb, jiffies |
| 619 | + msecs_to_jiffies(musb->a_wait_bcon |
| 620 | ? : OTG_TIME_A_WAIT_BCON)); |
| 621 | |
| 622 | break; |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 623 | case OTG_STATE_B_IDLE: |
| 624 | if (!musb->is_active) |
| 625 | break; |
| 626 | case OTG_STATE_B_PERIPHERAL: |
| 627 | musb_g_suspend(musb); |
| 628 | musb->is_active = is_otg_enabled(musb) |
| 629 | && musb->xceiv->gadget->b_hnp_enable; |
| 630 | if (musb->is_active) { |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 631 | musb->xceiv->state = OTG_STATE_B_WAIT_ACON; |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 632 | dev_dbg(musb->controller, "HNP: Setting timer for b_ase0_brst\n"); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 633 | mod_timer(&musb->otg_timer, jiffies |
| 634 | + msecs_to_jiffies( |
| 635 | OTG_TIME_B_ASE0_BRST)); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 636 | } |
| 637 | break; |
| 638 | case OTG_STATE_A_WAIT_BCON: |
| 639 | if (musb->a_wait_bcon != 0) |
| 640 | musb_platform_try_idle(musb, jiffies |
| 641 | + msecs_to_jiffies(musb->a_wait_bcon)); |
| 642 | break; |
| 643 | case OTG_STATE_A_HOST: |
| 644 | musb->xceiv->state = OTG_STATE_A_SUSPEND; |
| 645 | musb->is_active = is_otg_enabled(musb) |
| 646 | && musb->xceiv->host->b_hnp_enable; |
| 647 | break; |
| 648 | case OTG_STATE_B_HOST: |
| 649 | /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 650 | dev_dbg(musb->controller, "REVISIT: SUSPEND as B_HOST\n"); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 651 | break; |
| 652 | default: |
| 653 | /* "should not happen" */ |
| 654 | musb->is_active = 0; |
| 655 | break; |
| 656 | } |
| 657 | } |
| 658 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 659 | if (int_usb & MUSB_INTR_CONNECT) { |
| 660 | struct usb_hcd *hcd = musb_to_hcd(musb); |
| 661 | |
| 662 | handled = IRQ_HANDLED; |
| 663 | musb->is_active = 1; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 664 | |
| 665 | musb->ep0_stage = MUSB_EP0_START; |
| 666 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 667 | /* flush endpoints when transitioning from Device Mode */ |
| 668 | if (is_peripheral_active(musb)) { |
| 669 | /* REVISIT HNP; just force disconnect */ |
| 670 | } |
Ajay Kumar Gupta | d709d22 | 2010-07-08 14:03:00 +0530 | [diff] [blame] | 671 | musb_writew(musb->mregs, MUSB_INTRTXE, musb->epmask); |
| 672 | musb_writew(musb->mregs, MUSB_INTRRXE, musb->epmask & 0xfffe); |
| 673 | musb_writeb(musb->mregs, MUSB_INTRUSBE, 0xf7); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 674 | musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED |
| 675 | |USB_PORT_STAT_HIGH_SPEED |
| 676 | |USB_PORT_STAT_ENABLE |
| 677 | ); |
| 678 | musb->port1_status |= USB_PORT_STAT_CONNECTION |
| 679 | |(USB_PORT_STAT_C_CONNECTION << 16); |
| 680 | |
| 681 | /* high vs full speed is just a guess until after reset */ |
| 682 | if (devctl & MUSB_DEVCTL_LSDEV) |
| 683 | musb->port1_status |= USB_PORT_STAT_LOW_SPEED; |
| 684 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 685 | /* indicate new connection to OTG machine */ |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 686 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 687 | case OTG_STATE_B_PERIPHERAL: |
| 688 | if (int_usb & MUSB_INTR_SUSPEND) { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 689 | dev_dbg(musb->controller, "HNP: SUSPEND+CONNECT, now b_host\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 690 | int_usb &= ~MUSB_INTR_SUSPEND; |
David Brownell | 1de00da | 2009-04-02 10:16:11 -0700 | [diff] [blame] | 691 | goto b_host; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 692 | } else |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 693 | dev_dbg(musb->controller, "CONNECT as b_peripheral???\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 694 | break; |
| 695 | case OTG_STATE_B_WAIT_ACON: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 696 | dev_dbg(musb->controller, "HNP: CONNECT, now b_host\n"); |
David Brownell | 1de00da | 2009-04-02 10:16:11 -0700 | [diff] [blame] | 697 | b_host: |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 698 | musb->xceiv->state = OTG_STATE_B_HOST; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 699 | hcd->self.is_b_host = 1; |
David Brownell | 1de00da | 2009-04-02 10:16:11 -0700 | [diff] [blame] | 700 | musb->ignore_disconnect = 0; |
| 701 | del_timer(&musb->otg_timer); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 702 | break; |
| 703 | default: |
| 704 | if ((devctl & MUSB_DEVCTL_VBUS) |
| 705 | == (3 << MUSB_DEVCTL_VBUS_SHIFT)) { |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 706 | musb->xceiv->state = OTG_STATE_A_HOST; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 707 | hcd->self.is_b_host = 0; |
| 708 | } |
| 709 | break; |
| 710 | } |
David Brownell | 1de00da | 2009-04-02 10:16:11 -0700 | [diff] [blame] | 711 | |
| 712 | /* poke the root hub */ |
| 713 | MUSB_HST_MODE(musb); |
| 714 | if (hcd->status_urb) |
| 715 | usb_hcd_poll_rh_status(hcd); |
| 716 | else |
| 717 | usb_hcd_resume_root_hub(hcd); |
| 718 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 719 | dev_dbg(musb->controller, "CONNECT (%s) devctl %02x\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 720 | otg_state_string(musb->xceiv->state), devctl); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 721 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 722 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 723 | if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 724 | dev_dbg(musb->controller, "DISCONNECT (%s) as %s, devctl %02x\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 725 | otg_state_string(musb->xceiv->state), |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 726 | MUSB_MODE(musb), devctl); |
| 727 | handled = IRQ_HANDLED; |
| 728 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 729 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 730 | case OTG_STATE_A_HOST: |
| 731 | case OTG_STATE_A_SUSPEND: |
Anand Gadiyar | 5c23c90 | 2009-02-21 15:31:40 -0800 | [diff] [blame] | 732 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 733 | musb_root_disconnect(musb); |
Ajay Kumar Gupta | 7438217 | 2009-02-24 15:29:04 -0800 | [diff] [blame] | 734 | if (musb->a_wait_bcon != 0 && is_otg_enabled(musb)) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 735 | musb_platform_try_idle(musb, jiffies |
| 736 | + msecs_to_jiffies(musb->a_wait_bcon)); |
| 737 | break; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 738 | case OTG_STATE_B_HOST: |
David Brownell | ab983f2a | 2009-03-31 12:35:09 -0700 | [diff] [blame] | 739 | /* REVISIT this behaves for "real disconnect" |
| 740 | * cases; make sure the other transitions from |
| 741 | * from B_HOST act right too. The B_HOST code |
| 742 | * in hnp_stop() is currently not used... |
| 743 | */ |
| 744 | musb_root_disconnect(musb); |
| 745 | musb_to_hcd(musb)->self.is_b_host = 0; |
| 746 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
| 747 | MUSB_DEV_MODE(musb); |
| 748 | musb_g_disconnect(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 749 | break; |
| 750 | case OTG_STATE_A_PERIPHERAL: |
| 751 | musb_hnp_stop(musb); |
| 752 | musb_root_disconnect(musb); |
| 753 | /* FALLTHROUGH */ |
| 754 | case OTG_STATE_B_WAIT_ACON: |
| 755 | /* FALLTHROUGH */ |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 756 | case OTG_STATE_B_PERIPHERAL: |
| 757 | case OTG_STATE_B_IDLE: |
| 758 | musb_g_disconnect(musb); |
| 759 | break; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 760 | default: |
| 761 | WARNING("unhandled DISCONNECT transition (%s)\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 762 | otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 763 | break; |
| 764 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 765 | } |
| 766 | |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 767 | /* mentor saves a bit: bus reset and babble share the same irq. |
| 768 | * only host sees babble; only peripheral sees bus reset. |
| 769 | */ |
| 770 | if (int_usb & MUSB_INTR_RESET) { |
| 771 | handled = IRQ_HANDLED; |
| 772 | if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) { |
| 773 | /* |
| 774 | * Looks like non-HS BABBLE can be ignored, but |
| 775 | * HS BABBLE is an error condition. For HS the solution |
| 776 | * is to avoid babble in the first place and fix what |
| 777 | * caused BABBLE. When HS BABBLE happens we can only |
| 778 | * stop the session. |
| 779 | */ |
| 780 | if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV)) |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 781 | dev_dbg(musb->controller, "BABBLE devctl: %02x\n", devctl); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 782 | else { |
| 783 | ERR("Stopping host session -- babble\n"); |
| 784 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); |
| 785 | } |
| 786 | } else if (is_peripheral_capable()) { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 787 | dev_dbg(musb->controller, "BUS RESET as %s\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 788 | otg_state_string(musb->xceiv->state)); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 789 | switch (musb->xceiv->state) { |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 790 | case OTG_STATE_A_SUSPEND: |
| 791 | /* We need to ignore disconnect on suspend |
| 792 | * otherwise tusb 2.0 won't reconnect after a |
| 793 | * power cycle, which breaks otg compliance. |
| 794 | */ |
| 795 | musb->ignore_disconnect = 1; |
| 796 | musb_g_reset(musb); |
| 797 | /* FALLTHROUGH */ |
| 798 | case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */ |
| 799 | /* never use invalid T(a_wait_bcon) */ |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 800 | dev_dbg(musb->controller, "HNP: in %s, %d msec timeout\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 801 | otg_state_string(musb->xceiv->state), |
| 802 | TA_WAIT_BCON(musb)); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 803 | mod_timer(&musb->otg_timer, jiffies |
| 804 | + msecs_to_jiffies(TA_WAIT_BCON(musb))); |
| 805 | break; |
| 806 | case OTG_STATE_A_PERIPHERAL: |
| 807 | musb->ignore_disconnect = 0; |
| 808 | del_timer(&musb->otg_timer); |
| 809 | musb_g_reset(musb); |
| 810 | break; |
| 811 | case OTG_STATE_B_WAIT_ACON: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 812 | dev_dbg(musb->controller, "HNP: RESET (%s), to b_peripheral\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 813 | otg_state_string(musb->xceiv->state)); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 814 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
| 815 | musb_g_reset(musb); |
| 816 | break; |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 817 | case OTG_STATE_B_IDLE: |
| 818 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
| 819 | /* FALLTHROUGH */ |
| 820 | case OTG_STATE_B_PERIPHERAL: |
| 821 | musb_g_reset(musb); |
| 822 | break; |
| 823 | default: |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 824 | dev_dbg(musb->controller, "Unhandled BUS RESET as %s\n", |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 825 | otg_state_string(musb->xceiv->state)); |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 826 | } |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | #if 0 |
| 831 | /* REVISIT ... this would be for multiplexing periodic endpoints, or |
| 832 | * supporting transfer phasing to prevent exceeding ISO bandwidth |
| 833 | * limits of a given frame or microframe. |
| 834 | * |
| 835 | * It's not needed for peripheral side, which dedicates endpoints; |
| 836 | * though it _might_ use SOF irqs for other purposes. |
| 837 | * |
| 838 | * And it's not currently needed for host side, which also dedicates |
| 839 | * endpoints, relies on TX/RX interval registers, and isn't claimed |
| 840 | * to support ISO transfers yet. |
| 841 | */ |
| 842 | if (int_usb & MUSB_INTR_SOF) { |
| 843 | void __iomem *mbase = musb->mregs; |
| 844 | struct musb_hw_ep *ep; |
| 845 | u8 epnum; |
| 846 | u16 frame; |
| 847 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 848 | dev_dbg(musb->controller, "START_OF_FRAME\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 849 | handled = IRQ_HANDLED; |
| 850 | |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 851 | /* start any periodic Tx transfers waiting for current frame */ |
| 852 | frame = musb_readw(mbase, MUSB_FRAME); |
| 853 | ep = musb->endpoints; |
| 854 | for (epnum = 1; (epnum < musb->nr_endpoints) |
| 855 | && (musb->epmask >= (1 << epnum)); |
| 856 | epnum++, ep++) { |
| 857 | /* |
| 858 | * FIXME handle framecounter wraps (12 bits) |
| 859 | * eliminate duplicated StartUrb logic |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 860 | */ |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 861 | if (ep->dwWaitFrame >= frame) { |
| 862 | ep->dwWaitFrame = 0; |
| 863 | pr_debug("SOF --> periodic TX%s on %d\n", |
| 864 | ep->tx_channel ? " DMA" : "", |
| 865 | epnum); |
| 866 | if (!ep->tx_channel) |
| 867 | musb_h_tx_start(musb, epnum); |
| 868 | else |
| 869 | cppi_hostdma_start(musb, epnum); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 870 | } |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 871 | } /* end of for loop */ |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 872 | } |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 873 | #endif |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 874 | |
Arnaud Mandy | 1c25fda | 2009-12-28 13:40:40 +0200 | [diff] [blame] | 875 | schedule_work(&musb->irq_work); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 876 | |
| 877 | return handled; |
| 878 | } |
| 879 | |
| 880 | /*-------------------------------------------------------------------------*/ |
| 881 | |
| 882 | /* |
| 883 | * Program the HDRC to start (enable interrupts, dma, etc.). |
| 884 | */ |
| 885 | void musb_start(struct musb *musb) |
| 886 | { |
| 887 | void __iomem *regs = musb->mregs; |
| 888 | u8 devctl = musb_readb(regs, MUSB_DEVCTL); |
| 889 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 890 | dev_dbg(musb->controller, "<== devctl %02x\n", devctl); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 891 | |
| 892 | /* Set INT enable registers, enable interrupts */ |
| 893 | musb_writew(regs, MUSB_INTRTXE, musb->epmask); |
| 894 | musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe); |
| 895 | musb_writeb(regs, MUSB_INTRUSBE, 0xf7); |
| 896 | |
| 897 | musb_writeb(regs, MUSB_TESTMODE, 0); |
| 898 | |
| 899 | /* put into basic highspeed mode and start session */ |
| 900 | musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 901 | | MUSB_POWER_HSENAB |
| 902 | /* ENSUSPEND wedges tusb */ |
| 903 | /* | MUSB_POWER_ENSUSPEND */ |
| 904 | ); |
| 905 | |
| 906 | musb->is_active = 0; |
| 907 | devctl = musb_readb(regs, MUSB_DEVCTL); |
| 908 | devctl &= ~MUSB_DEVCTL_SESSION; |
| 909 | |
| 910 | if (is_otg_enabled(musb)) { |
| 911 | /* session started after: |
| 912 | * (a) ID-grounded irq, host mode; |
| 913 | * (b) vbus present/connect IRQ, peripheral mode; |
| 914 | * (c) peripheral initiates, using SRP |
| 915 | */ |
| 916 | if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) |
| 917 | musb->is_active = 1; |
| 918 | else |
| 919 | devctl |= MUSB_DEVCTL_SESSION; |
| 920 | |
| 921 | } else if (is_host_enabled(musb)) { |
| 922 | /* assume ID pin is hard-wired to ground */ |
| 923 | devctl |= MUSB_DEVCTL_SESSION; |
| 924 | |
| 925 | } else /* peripheral is enabled */ { |
| 926 | if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) |
| 927 | musb->is_active = 1; |
| 928 | } |
| 929 | musb_platform_enable(musb); |
| 930 | musb_writeb(regs, MUSB_DEVCTL, devctl); |
| 931 | } |
| 932 | |
| 933 | |
| 934 | static void musb_generic_disable(struct musb *musb) |
| 935 | { |
| 936 | void __iomem *mbase = musb->mregs; |
| 937 | u16 temp; |
| 938 | |
| 939 | /* disable interrupts */ |
| 940 | musb_writeb(mbase, MUSB_INTRUSBE, 0); |
| 941 | musb_writew(mbase, MUSB_INTRTXE, 0); |
| 942 | musb_writew(mbase, MUSB_INTRRXE, 0); |
| 943 | |
| 944 | /* off */ |
| 945 | musb_writeb(mbase, MUSB_DEVCTL, 0); |
| 946 | |
| 947 | /* flush pending interrupts */ |
| 948 | temp = musb_readb(mbase, MUSB_INTRUSB); |
| 949 | temp = musb_readw(mbase, MUSB_INTRTX); |
| 950 | temp = musb_readw(mbase, MUSB_INTRRX); |
| 951 | |
| 952 | } |
| 953 | |
| 954 | /* |
| 955 | * Make the HDRC stop (disable interrupts, etc.); |
| 956 | * reversible by musb_start |
| 957 | * called on gadget driver unregister |
| 958 | * with controller locked, irqs blocked |
| 959 | * acts as a NOP unless some role activated the hardware |
| 960 | */ |
| 961 | void musb_stop(struct musb *musb) |
| 962 | { |
| 963 | /* stop IRQs, timers, ... */ |
| 964 | musb_platform_disable(musb); |
| 965 | musb_generic_disable(musb); |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 966 | dev_dbg(musb->controller, "HDRC disabled\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 967 | |
| 968 | /* FIXME |
| 969 | * - mark host and/or peripheral drivers unusable/inactive |
| 970 | * - disable DMA (and enable it in HdrcStart) |
| 971 | * - make sure we can musb_start() after musb_stop(); with |
| 972 | * OTG mode, gadget driver module rmmod/modprobe cycles that |
| 973 | * - ... |
| 974 | */ |
| 975 | musb_platform_try_idle(musb, 0); |
| 976 | } |
| 977 | |
| 978 | static void musb_shutdown(struct platform_device *pdev) |
| 979 | { |
| 980 | struct musb *musb = dev_to_musb(&pdev->dev); |
| 981 | unsigned long flags; |
| 982 | |
Hema HK | 4f9edd2 | 2011-03-22 16:02:12 +0530 | [diff] [blame] | 983 | pm_runtime_get_sync(musb->controller); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 984 | spin_lock_irqsave(&musb->lock, flags); |
| 985 | musb_platform_disable(musb); |
| 986 | musb_generic_disable(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 987 | spin_unlock_irqrestore(&musb->lock, flags); |
| 988 | |
Grazvydas Ignotas | 120d074 | 2010-10-10 13:52:22 -0500 | [diff] [blame] | 989 | if (!is_otg_enabled(musb) && is_host_enabled(musb)) |
| 990 | usb_remove_hcd(musb_to_hcd(musb)); |
| 991 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); |
| 992 | musb_platform_exit(musb); |
Grazvydas Ignotas | 120d074 | 2010-10-10 13:52:22 -0500 | [diff] [blame] | 993 | |
Hema HK | 4f9edd2 | 2011-03-22 16:02:12 +0530 | [diff] [blame] | 994 | pm_runtime_put(musb->controller); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 995 | /* FIXME power down */ |
| 996 | } |
| 997 | |
| 998 | |
| 999 | /*-------------------------------------------------------------------------*/ |
| 1000 | |
| 1001 | /* |
| 1002 | * The silicon either has hard-wired endpoint configurations, or else |
| 1003 | * "dynamic fifo" sizing. The driver has support for both, though at this |
David Brownell | c767c1c | 2008-09-11 11:53:23 +0300 | [diff] [blame] | 1004 | * writing only the dynamic sizing is very well tested. Since we switched |
| 1005 | * away from compile-time hardware parameters, we can no longer rely on |
| 1006 | * dead code elimination to leave only the relevant one in the object file. |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1007 | * |
| 1008 | * We don't currently use dynamic fifo setup capability to do anything |
| 1009 | * more than selecting one of a bunch of predefined configurations. |
| 1010 | */ |
Felipe Balbi | ee34e51 | 2011-06-29 12:45:03 +0300 | [diff] [blame] | 1011 | #if defined(CONFIG_USB_MUSB_TUSB6010) \ |
| 1012 | || defined(CONFIG_USB_MUSB_TUSB6010_MODULE) \ |
| 1013 | || defined(CONFIG_USB_MUSB_OMAP2PLUS) \ |
| 1014 | || defined(CONFIG_USB_MUSB_OMAP2PLUS_MODULE) \ |
| 1015 | || defined(CONFIG_USB_MUSB_AM35X) \ |
| 1016 | || defined(CONFIG_USB_MUSB_AM35X_MODULE) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1017 | static ushort __initdata fifo_mode = 4; |
Felipe Balbi | ee34e51 | 2011-06-29 12:45:03 +0300 | [diff] [blame] | 1018 | #elif defined(CONFIG_USB_MUSB_UX500) \ |
| 1019 | || defined(CONFIG_USB_MUSB_UX500_MODULE) |
Mian Yousaf Kaukab | 4bc36fd | 2010-12-09 13:05:01 +0100 | [diff] [blame] | 1020 | static ushort __initdata fifo_mode = 5; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1021 | #else |
| 1022 | static ushort __initdata fifo_mode = 2; |
| 1023 | #endif |
| 1024 | |
| 1025 | /* "modprobe ... fifo_mode=1" etc */ |
| 1026 | module_param(fifo_mode, ushort, 0); |
| 1027 | MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration"); |
| 1028 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1029 | /* |
| 1030 | * tables defining fifo_mode values. define more if you like. |
| 1031 | * for host side, make sure both halves of ep1 are set up. |
| 1032 | */ |
| 1033 | |
| 1034 | /* mode 0 - fits in 2KB */ |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1035 | static struct musb_fifo_cfg __initdata mode_0_cfg[] = { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1036 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
| 1037 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, |
| 1038 | { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, }, |
| 1039 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1040 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1041 | }; |
| 1042 | |
| 1043 | /* mode 1 - fits in 4KB */ |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1044 | static struct musb_fifo_cfg __initdata mode_1_cfg[] = { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1045 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, |
| 1046 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, |
| 1047 | { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, }, |
| 1048 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1049 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1050 | }; |
| 1051 | |
| 1052 | /* mode 2 - fits in 4KB */ |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1053 | static struct musb_fifo_cfg __initdata mode_2_cfg[] = { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1054 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
| 1055 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, |
| 1056 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, |
| 1057 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, |
| 1058 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1059 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1060 | }; |
| 1061 | |
| 1062 | /* mode 3 - fits in 4KB */ |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1063 | static struct musb_fifo_cfg __initdata mode_3_cfg[] = { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1064 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, |
| 1065 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, |
| 1066 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, |
| 1067 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, |
| 1068 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1069 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, |
| 1070 | }; |
| 1071 | |
| 1072 | /* mode 4 - fits in 16KB */ |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1073 | static struct musb_fifo_cfg __initdata mode_4_cfg[] = { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1074 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
| 1075 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, |
| 1076 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, |
| 1077 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, |
| 1078 | { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, }, |
| 1079 | { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, }, |
| 1080 | { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, }, |
| 1081 | { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, }, |
| 1082 | { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, }, |
| 1083 | { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, }, |
| 1084 | { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, }, |
| 1085 | { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, }, |
| 1086 | { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, }, |
| 1087 | { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, }, |
| 1088 | { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, }, |
| 1089 | { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, }, |
| 1090 | { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, }, |
| 1091 | { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, }, |
Ajay Kumar Gupta | a483d70 | 2009-04-03 16:16:17 -0700 | [diff] [blame] | 1092 | { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, }, |
| 1093 | { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, }, |
| 1094 | { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, }, |
| 1095 | { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, }, |
| 1096 | { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, }, |
| 1097 | { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, }, |
| 1098 | { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, }, |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1099 | { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, }, |
| 1100 | { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, }, |
| 1101 | }; |
| 1102 | |
Ajay Kumar Gupta | 3b15152 | 2009-12-28 13:40:34 +0200 | [diff] [blame] | 1103 | /* mode 5 - fits in 8KB */ |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1104 | static struct musb_fifo_cfg __initdata mode_5_cfg[] = { |
Ajay Kumar Gupta | 3b15152 | 2009-12-28 13:40:34 +0200 | [diff] [blame] | 1105 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, |
| 1106 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, |
| 1107 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, |
| 1108 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, |
| 1109 | { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, }, |
| 1110 | { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, }, |
| 1111 | { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, }, |
| 1112 | { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, }, |
| 1113 | { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, }, |
| 1114 | { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, }, |
| 1115 | { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 32, }, |
| 1116 | { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 32, }, |
| 1117 | { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 32, }, |
| 1118 | { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 32, }, |
| 1119 | { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 32, }, |
| 1120 | { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 32, }, |
| 1121 | { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 32, }, |
| 1122 | { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 32, }, |
| 1123 | { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 32, }, |
| 1124 | { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 32, }, |
| 1125 | { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 32, }, |
| 1126 | { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 32, }, |
| 1127 | { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 32, }, |
| 1128 | { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 32, }, |
| 1129 | { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, }, |
| 1130 | { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, }, |
| 1131 | { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, }, |
| 1132 | }; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1133 | |
| 1134 | /* |
| 1135 | * configure a fifo; for non-shared endpoints, this may be called |
| 1136 | * once for a tx fifo and once for an rx fifo. |
| 1137 | * |
| 1138 | * returns negative errno or offset for next fifo. |
| 1139 | */ |
| 1140 | static int __init |
| 1141 | fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep, |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1142 | const struct musb_fifo_cfg *cfg, u16 offset) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1143 | { |
| 1144 | void __iomem *mbase = musb->mregs; |
| 1145 | int size = 0; |
| 1146 | u16 maxpacket = cfg->maxpacket; |
| 1147 | u16 c_off = offset >> 3; |
| 1148 | u8 c_size; |
| 1149 | |
| 1150 | /* expect hw_ep has already been zero-initialized */ |
| 1151 | |
| 1152 | size = ffs(max(maxpacket, (u16) 8)) - 1; |
| 1153 | maxpacket = 1 << size; |
| 1154 | |
| 1155 | c_size = size - 3; |
| 1156 | if (cfg->mode == BUF_DOUBLE) { |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1157 | if ((offset + (maxpacket << 1)) > |
| 1158 | (1 << (musb->config->ram_bits + 2))) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1159 | return -EMSGSIZE; |
| 1160 | c_size |= MUSB_FIFOSZ_DPB; |
| 1161 | } else { |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1162 | if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2))) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1163 | return -EMSGSIZE; |
| 1164 | } |
| 1165 | |
| 1166 | /* configure the FIFO */ |
| 1167 | musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum); |
| 1168 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1169 | /* EP0 reserved endpoint for control, bidirectional; |
| 1170 | * EP1 reserved for bulk, two unidirection halves. |
| 1171 | */ |
| 1172 | if (hw_ep->epnum == 1) |
| 1173 | musb->bulk_ep = hw_ep; |
| 1174 | /* REVISIT error check: be sure ep0 can both rx and tx ... */ |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1175 | switch (cfg->style) { |
| 1176 | case FIFO_TX: |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1177 | musb_write_txfifosz(mbase, c_size); |
| 1178 | musb_write_txfifoadd(mbase, c_off); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1179 | hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
| 1180 | hw_ep->max_packet_sz_tx = maxpacket; |
| 1181 | break; |
| 1182 | case FIFO_RX: |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1183 | musb_write_rxfifosz(mbase, c_size); |
| 1184 | musb_write_rxfifoadd(mbase, c_off); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1185 | hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
| 1186 | hw_ep->max_packet_sz_rx = maxpacket; |
| 1187 | break; |
| 1188 | case FIFO_RXTX: |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1189 | musb_write_txfifosz(mbase, c_size); |
| 1190 | musb_write_txfifoadd(mbase, c_off); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1191 | hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
| 1192 | hw_ep->max_packet_sz_rx = maxpacket; |
| 1193 | |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1194 | musb_write_rxfifosz(mbase, c_size); |
| 1195 | musb_write_rxfifoadd(mbase, c_off); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1196 | hw_ep->tx_double_buffered = hw_ep->rx_double_buffered; |
| 1197 | hw_ep->max_packet_sz_tx = maxpacket; |
| 1198 | |
| 1199 | hw_ep->is_shared_fifo = true; |
| 1200 | break; |
| 1201 | } |
| 1202 | |
| 1203 | /* NOTE rx and tx endpoint irqs aren't managed separately, |
| 1204 | * which happens to be ok |
| 1205 | */ |
| 1206 | musb->epmask |= (1 << hw_ep->epnum); |
| 1207 | |
| 1208 | return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0)); |
| 1209 | } |
| 1210 | |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1211 | static struct musb_fifo_cfg __initdata ep0_cfg = { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1212 | .style = FIFO_RXTX, .maxpacket = 64, |
| 1213 | }; |
| 1214 | |
| 1215 | static int __init ep_config_from_table(struct musb *musb) |
| 1216 | { |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1217 | const struct musb_fifo_cfg *cfg; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1218 | unsigned i, n; |
| 1219 | int offset; |
| 1220 | struct musb_hw_ep *hw_ep = musb->endpoints; |
| 1221 | |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1222 | if (musb->config->fifo_cfg) { |
| 1223 | cfg = musb->config->fifo_cfg; |
| 1224 | n = musb->config->fifo_cfg_size; |
| 1225 | goto done; |
| 1226 | } |
| 1227 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1228 | switch (fifo_mode) { |
| 1229 | default: |
| 1230 | fifo_mode = 0; |
| 1231 | /* FALLTHROUGH */ |
| 1232 | case 0: |
| 1233 | cfg = mode_0_cfg; |
| 1234 | n = ARRAY_SIZE(mode_0_cfg); |
| 1235 | break; |
| 1236 | case 1: |
| 1237 | cfg = mode_1_cfg; |
| 1238 | n = ARRAY_SIZE(mode_1_cfg); |
| 1239 | break; |
| 1240 | case 2: |
| 1241 | cfg = mode_2_cfg; |
| 1242 | n = ARRAY_SIZE(mode_2_cfg); |
| 1243 | break; |
| 1244 | case 3: |
| 1245 | cfg = mode_3_cfg; |
| 1246 | n = ARRAY_SIZE(mode_3_cfg); |
| 1247 | break; |
| 1248 | case 4: |
| 1249 | cfg = mode_4_cfg; |
| 1250 | n = ARRAY_SIZE(mode_4_cfg); |
| 1251 | break; |
Ajay Kumar Gupta | 3b15152 | 2009-12-28 13:40:34 +0200 | [diff] [blame] | 1252 | case 5: |
| 1253 | cfg = mode_5_cfg; |
| 1254 | n = ARRAY_SIZE(mode_5_cfg); |
| 1255 | break; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | printk(KERN_DEBUG "%s: setup fifo_mode %d\n", |
| 1259 | musb_driver_name, fifo_mode); |
| 1260 | |
| 1261 | |
Felipe Balbi | e6c213b | 2010-03-12 10:29:06 +0200 | [diff] [blame] | 1262 | done: |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1263 | offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0); |
| 1264 | /* assert(offset > 0) */ |
| 1265 | |
| 1266 | /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1267 | * be better than static musb->config->num_eps and DYN_FIFO_SIZE... |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1268 | */ |
| 1269 | |
| 1270 | for (i = 0; i < n; i++) { |
| 1271 | u8 epn = cfg->hw_ep_num; |
| 1272 | |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1273 | if (epn >= musb->config->num_eps) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1274 | pr_debug("%s: invalid ep %d\n", |
| 1275 | musb_driver_name, epn); |
David Brownell | bb1c9ef | 2008-11-24 13:06:50 +0200 | [diff] [blame] | 1276 | return -EINVAL; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1277 | } |
| 1278 | offset = fifo_setup(musb, hw_ep + epn, cfg++, offset); |
| 1279 | if (offset < 0) { |
| 1280 | pr_debug("%s: mem overrun, ep %d\n", |
| 1281 | musb_driver_name, epn); |
| 1282 | return -EINVAL; |
| 1283 | } |
| 1284 | epn++; |
| 1285 | musb->nr_endpoints = max(epn, musb->nr_endpoints); |
| 1286 | } |
| 1287 | |
| 1288 | printk(KERN_DEBUG "%s: %d/%d max ep, %d/%d memory\n", |
| 1289 | musb_driver_name, |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1290 | n + 1, musb->config->num_eps * 2 - 1, |
| 1291 | offset, (1 << (musb->config->ram_bits + 2))); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1292 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1293 | if (!musb->bulk_ep) { |
| 1294 | pr_debug("%s: missing bulk\n", musb_driver_name); |
| 1295 | return -EINVAL; |
| 1296 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1297 | |
| 1298 | return 0; |
| 1299 | } |
| 1300 | |
| 1301 | |
| 1302 | /* |
| 1303 | * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false |
| 1304 | * @param musb the controller |
| 1305 | */ |
| 1306 | static int __init ep_config_from_hw(struct musb *musb) |
| 1307 | { |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1308 | u8 epnum = 0; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1309 | struct musb_hw_ep *hw_ep; |
| 1310 | void *mbase = musb->mregs; |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1311 | int ret = 0; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1312 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 1313 | dev_dbg(musb->controller, "<== static silicon ep config\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1314 | |
| 1315 | /* FIXME pick up ep0 maxpacket size */ |
| 1316 | |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1317 | for (epnum = 1; epnum < musb->config->num_eps; epnum++) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1318 | musb_ep_select(mbase, epnum); |
| 1319 | hw_ep = musb->endpoints + epnum; |
| 1320 | |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1321 | ret = musb_read_fifosize(musb, hw_ep, epnum); |
| 1322 | if (ret < 0) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1323 | break; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1324 | |
| 1325 | /* FIXME set up hw_ep->{rx,tx}_double_buffered */ |
| 1326 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1327 | /* pick an RX/TX endpoint for bulk */ |
| 1328 | if (hw_ep->max_packet_sz_tx < 512 |
| 1329 | || hw_ep->max_packet_sz_rx < 512) |
| 1330 | continue; |
| 1331 | |
| 1332 | /* REVISIT: this algorithm is lazy, we should at least |
| 1333 | * try to pick a double buffered endpoint. |
| 1334 | */ |
| 1335 | if (musb->bulk_ep) |
| 1336 | continue; |
| 1337 | musb->bulk_ep = hw_ep; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1338 | } |
| 1339 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1340 | if (!musb->bulk_ep) { |
| 1341 | pr_debug("%s: missing bulk\n", musb_driver_name); |
| 1342 | return -EINVAL; |
| 1343 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1344 | |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
| 1348 | enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, }; |
| 1349 | |
| 1350 | /* Initialize MUSB (M)HDRC part of the USB hardware subsystem; |
| 1351 | * configure endpoints, or take their config from silicon |
| 1352 | */ |
| 1353 | static int __init musb_core_init(u16 musb_type, struct musb *musb) |
| 1354 | { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1355 | u8 reg; |
| 1356 | char *type; |
Maulik Mankad | 0ea52ff | 2009-12-22 16:19:53 +0530 | [diff] [blame] | 1357 | char aInfo[90], aRevision[32], aDate[12]; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1358 | void __iomem *mbase = musb->mregs; |
| 1359 | int status = 0; |
| 1360 | int i; |
| 1361 | |
| 1362 | /* log core options (read using indexed model) */ |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1363 | reg = musb_read_configdata(mbase); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1364 | |
| 1365 | strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8"); |
Ajay Kumar Gupta | 51bf0d0 | 2009-12-28 13:40:41 +0200 | [diff] [blame] | 1366 | if (reg & MUSB_CONFIGDATA_DYNFIFO) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1367 | strcat(aInfo, ", dyn FIFOs"); |
Ajay Kumar Gupta | 51bf0d0 | 2009-12-28 13:40:41 +0200 | [diff] [blame] | 1368 | musb->dyn_fifo = true; |
| 1369 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1370 | if (reg & MUSB_CONFIGDATA_MPRXE) { |
| 1371 | strcat(aInfo, ", bulk combine"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1372 | musb->bulk_combine = true; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1373 | } |
| 1374 | if (reg & MUSB_CONFIGDATA_MPTXE) { |
| 1375 | strcat(aInfo, ", bulk split"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1376 | musb->bulk_split = true; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1377 | } |
| 1378 | if (reg & MUSB_CONFIGDATA_HBRXE) { |
| 1379 | strcat(aInfo, ", HB-ISO Rx"); |
Ajay Kumar Gupta | a483d70 | 2009-04-03 16:16:17 -0700 | [diff] [blame] | 1380 | musb->hb_iso_rx = true; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1381 | } |
| 1382 | if (reg & MUSB_CONFIGDATA_HBTXE) { |
| 1383 | strcat(aInfo, ", HB-ISO Tx"); |
Ajay Kumar Gupta | a483d70 | 2009-04-03 16:16:17 -0700 | [diff] [blame] | 1384 | musb->hb_iso_tx = true; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1385 | } |
| 1386 | if (reg & MUSB_CONFIGDATA_SOFTCONE) |
| 1387 | strcat(aInfo, ", SoftConn"); |
| 1388 | |
| 1389 | printk(KERN_DEBUG "%s: ConfigData=0x%02x (%s)\n", |
| 1390 | musb_driver_name, reg, aInfo); |
| 1391 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1392 | aDate[0] = 0; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1393 | if (MUSB_CONTROLLER_MHDRC == musb_type) { |
| 1394 | musb->is_multipoint = 1; |
| 1395 | type = "M"; |
| 1396 | } else { |
| 1397 | musb->is_multipoint = 0; |
| 1398 | type = ""; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1399 | #ifndef CONFIG_USB_OTG_BLACKLIST_HUB |
| 1400 | printk(KERN_ERR |
| 1401 | "%s: kernel must blacklist external hubs\n", |
| 1402 | musb_driver_name); |
| 1403 | #endif |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1404 | } |
| 1405 | |
| 1406 | /* log release info */ |
Anand Gadiyar | 32c3b94 | 2009-11-16 21:09:21 +0530 | [diff] [blame] | 1407 | musb->hwvers = musb_read_hwvers(mbase); |
| 1408 | snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers), |
| 1409 | MUSB_HWVERS_MINOR(musb->hwvers), |
| 1410 | (musb->hwvers & MUSB_HWVERS_RC) ? "RC" : ""); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1411 | printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n", |
| 1412 | musb_driver_name, type, aRevision, aDate); |
| 1413 | |
| 1414 | /* configure ep0 */ |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1415 | musb_configure_ep0(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1416 | |
| 1417 | /* discover endpoint configuration */ |
| 1418 | musb->nr_endpoints = 1; |
| 1419 | musb->epmask = 1; |
| 1420 | |
Felipe Balbi | ad517e9e | 2010-01-21 15:33:54 +0200 | [diff] [blame] | 1421 | if (musb->dyn_fifo) |
| 1422 | status = ep_config_from_table(musb); |
| 1423 | else |
| 1424 | status = ep_config_from_hw(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1425 | |
| 1426 | if (status < 0) |
| 1427 | return status; |
| 1428 | |
| 1429 | /* finish init, and print endpoint config */ |
| 1430 | for (i = 0; i < musb->nr_endpoints; i++) { |
| 1431 | struct musb_hw_ep *hw_ep = musb->endpoints + i; |
| 1432 | |
| 1433 | hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase; |
Arnd Bergmann | 9a35f87 | 2011-10-02 16:45:47 +0200 | [diff] [blame] | 1434 | #if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1435 | hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i); |
| 1436 | hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i); |
| 1437 | hw_ep->fifo_sync_va = |
| 1438 | musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i); |
| 1439 | |
| 1440 | if (i == 0) |
| 1441 | hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF; |
| 1442 | else |
| 1443 | hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2); |
| 1444 | #endif |
| 1445 | |
| 1446 | hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase; |
Bryan Wu | c6cf8b0 | 2008-12-02 21:33:48 +0200 | [diff] [blame] | 1447 | hw_ep->target_regs = musb_read_target_reg_base(i, mbase); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1448 | hw_ep->rx_reinit = 1; |
| 1449 | hw_ep->tx_reinit = 1; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1450 | |
| 1451 | if (hw_ep->max_packet_sz_tx) { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 1452 | dev_dbg(musb->controller, |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1453 | "%s: hw_ep %d%s, %smax %d\n", |
| 1454 | musb_driver_name, i, |
| 1455 | hw_ep->is_shared_fifo ? "shared" : "tx", |
| 1456 | hw_ep->tx_double_buffered |
| 1457 | ? "doublebuffer, " : "", |
| 1458 | hw_ep->max_packet_sz_tx); |
| 1459 | } |
| 1460 | if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) { |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 1461 | dev_dbg(musb->controller, |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1462 | "%s: hw_ep %d%s, %smax %d\n", |
| 1463 | musb_driver_name, i, |
| 1464 | "rx", |
| 1465 | hw_ep->rx_double_buffered |
| 1466 | ? "doublebuffer, " : "", |
| 1467 | hw_ep->max_packet_sz_rx); |
| 1468 | } |
| 1469 | if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx)) |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 1470 | dev_dbg(musb->controller, "hw_ep %d not configured\n", i); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1471 | } |
| 1472 | |
| 1473 | return 0; |
| 1474 | } |
| 1475 | |
| 1476 | /*-------------------------------------------------------------------------*/ |
| 1477 | |
Tony Lindgren | 59b479e | 2011-01-27 16:39:40 -0800 | [diff] [blame] | 1478 | #if defined(CONFIG_SOC_OMAP2430) || defined(CONFIG_SOC_OMAP3430) || \ |
Mian Yousaf Kaukab | d067859 | 2011-11-01 08:37:40 +0100 | [diff] [blame] | 1479 | defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_ARCH_U8500) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1480 | |
| 1481 | static irqreturn_t generic_interrupt(int irq, void *__hci) |
| 1482 | { |
| 1483 | unsigned long flags; |
| 1484 | irqreturn_t retval = IRQ_NONE; |
| 1485 | struct musb *musb = __hci; |
| 1486 | |
| 1487 | spin_lock_irqsave(&musb->lock, flags); |
| 1488 | |
| 1489 | musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); |
| 1490 | musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); |
| 1491 | musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); |
| 1492 | |
| 1493 | if (musb->int_usb || musb->int_tx || musb->int_rx) |
| 1494 | retval = musb_interrupt(musb); |
| 1495 | |
| 1496 | spin_unlock_irqrestore(&musb->lock, flags); |
| 1497 | |
Sergei Shtylyov | a5073b5 | 2009-03-27 12:52:43 -0700 | [diff] [blame] | 1498 | return retval; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1499 | } |
| 1500 | |
| 1501 | #else |
| 1502 | #define generic_interrupt NULL |
| 1503 | #endif |
| 1504 | |
| 1505 | /* |
| 1506 | * handle all the irqs defined by the HDRC core. for now we expect: other |
| 1507 | * irq sources (phy, dma, etc) will be handled first, musb->int_* values |
| 1508 | * will be assigned, and the irq will already have been acked. |
| 1509 | * |
| 1510 | * called in irq context with spinlock held, irqs blocked |
| 1511 | */ |
| 1512 | irqreturn_t musb_interrupt(struct musb *musb) |
| 1513 | { |
| 1514 | irqreturn_t retval = IRQ_NONE; |
| 1515 | u8 devctl, power; |
| 1516 | int ep_num; |
| 1517 | u32 reg; |
| 1518 | |
| 1519 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
| 1520 | power = musb_readb(musb->mregs, MUSB_POWER); |
| 1521 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 1522 | dev_dbg(musb->controller, "** IRQ %s usb%04x tx%04x rx%04x\n", |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1523 | (devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral", |
| 1524 | musb->int_usb, musb->int_tx, musb->int_rx); |
| 1525 | |
| 1526 | /* the core can interrupt us for multiple reasons; docs have |
| 1527 | * a generic interrupt flowchart to follow |
| 1528 | */ |
Sergei Shtylyov | 7d9645f | 2010-06-24 23:07:06 +0530 | [diff] [blame] | 1529 | if (musb->int_usb) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1530 | retval |= musb_stage0_irq(musb, musb->int_usb, |
| 1531 | devctl, power); |
| 1532 | |
| 1533 | /* "stage 1" is handling endpoint irqs */ |
| 1534 | |
| 1535 | /* handle endpoint 0 first */ |
| 1536 | if (musb->int_tx & 1) { |
| 1537 | if (devctl & MUSB_DEVCTL_HM) |
| 1538 | retval |= musb_h_ep0_irq(musb); |
| 1539 | else |
| 1540 | retval |= musb_g_ep0_irq(musb); |
| 1541 | } |
| 1542 | |
| 1543 | /* RX on endpoints 1-15 */ |
| 1544 | reg = musb->int_rx >> 1; |
| 1545 | ep_num = 1; |
| 1546 | while (reg) { |
| 1547 | if (reg & 1) { |
| 1548 | /* musb_ep_select(musb->mregs, ep_num); */ |
| 1549 | /* REVISIT just retval = ep->rx_irq(...) */ |
| 1550 | retval = IRQ_HANDLED; |
| 1551 | if (devctl & MUSB_DEVCTL_HM) { |
| 1552 | if (is_host_capable()) |
| 1553 | musb_host_rx(musb, ep_num); |
| 1554 | } else { |
| 1555 | if (is_peripheral_capable()) |
| 1556 | musb_g_rx(musb, ep_num); |
| 1557 | } |
| 1558 | } |
| 1559 | |
| 1560 | reg >>= 1; |
| 1561 | ep_num++; |
| 1562 | } |
| 1563 | |
| 1564 | /* TX on endpoints 1-15 */ |
| 1565 | reg = musb->int_tx >> 1; |
| 1566 | ep_num = 1; |
| 1567 | while (reg) { |
| 1568 | if (reg & 1) { |
| 1569 | /* musb_ep_select(musb->mregs, ep_num); */ |
| 1570 | /* REVISIT just retval |= ep->tx_irq(...) */ |
| 1571 | retval = IRQ_HANDLED; |
| 1572 | if (devctl & MUSB_DEVCTL_HM) { |
| 1573 | if (is_host_capable()) |
| 1574 | musb_host_tx(musb, ep_num); |
| 1575 | } else { |
| 1576 | if (is_peripheral_capable()) |
| 1577 | musb_g_tx(musb, ep_num); |
| 1578 | } |
| 1579 | } |
| 1580 | reg >>= 1; |
| 1581 | ep_num++; |
| 1582 | } |
| 1583 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1584 | return retval; |
| 1585 | } |
Felipe Balbi | 981430a | 2011-05-11 13:02:23 +0300 | [diff] [blame] | 1586 | EXPORT_SYMBOL_GPL(musb_interrupt); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1587 | |
| 1588 | #ifndef CONFIG_MUSB_PIO_ONLY |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 1589 | static bool __initdata use_dma = 1; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1590 | |
| 1591 | /* "modprobe ... use_dma=0" etc */ |
| 1592 | module_param(use_dma, bool, 0); |
| 1593 | MODULE_PARM_DESC(use_dma, "enable/disable use of DMA"); |
| 1594 | |
| 1595 | void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit) |
| 1596 | { |
| 1597 | u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
| 1598 | |
| 1599 | /* called with controller lock already held */ |
| 1600 | |
| 1601 | if (!epnum) { |
| 1602 | #ifndef CONFIG_USB_TUSB_OMAP_DMA |
| 1603 | if (!is_cppi_enabled()) { |
| 1604 | /* endpoint 0 */ |
| 1605 | if (devctl & MUSB_DEVCTL_HM) |
| 1606 | musb_h_ep0_irq(musb); |
| 1607 | else |
| 1608 | musb_g_ep0_irq(musb); |
| 1609 | } |
| 1610 | #endif |
| 1611 | } else { |
| 1612 | /* endpoints 1..15 */ |
| 1613 | if (transmit) { |
| 1614 | if (devctl & MUSB_DEVCTL_HM) { |
| 1615 | if (is_host_capable()) |
| 1616 | musb_host_tx(musb, epnum); |
| 1617 | } else { |
| 1618 | if (is_peripheral_capable()) |
| 1619 | musb_g_tx(musb, epnum); |
| 1620 | } |
| 1621 | } else { |
| 1622 | /* receive */ |
| 1623 | if (devctl & MUSB_DEVCTL_HM) { |
| 1624 | if (is_host_capable()) |
| 1625 | musb_host_rx(musb, epnum); |
| 1626 | } else { |
| 1627 | if (is_peripheral_capable()) |
| 1628 | musb_g_rx(musb, epnum); |
| 1629 | } |
| 1630 | } |
| 1631 | } |
| 1632 | } |
Arnd Bergmann | 9a35f87 | 2011-10-02 16:45:47 +0200 | [diff] [blame] | 1633 | EXPORT_SYMBOL_GPL(musb_dma_completion); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1634 | |
| 1635 | #else |
| 1636 | #define use_dma 0 |
| 1637 | #endif |
| 1638 | |
| 1639 | /*-------------------------------------------------------------------------*/ |
| 1640 | |
| 1641 | #ifdef CONFIG_SYSFS |
| 1642 | |
| 1643 | static ssize_t |
| 1644 | musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 1645 | { |
| 1646 | struct musb *musb = dev_to_musb(dev); |
| 1647 | unsigned long flags; |
| 1648 | int ret = -EINVAL; |
| 1649 | |
| 1650 | spin_lock_irqsave(&musb->lock, flags); |
Anatolij Gustschin | 3df0045 | 2011-05-05 12:11:21 +0200 | [diff] [blame] | 1651 | ret = sprintf(buf, "%s\n", otg_state_string(musb->xceiv->state)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1652 | spin_unlock_irqrestore(&musb->lock, flags); |
| 1653 | |
| 1654 | return ret; |
| 1655 | } |
| 1656 | |
| 1657 | static ssize_t |
| 1658 | musb_mode_store(struct device *dev, struct device_attribute *attr, |
| 1659 | const char *buf, size_t n) |
| 1660 | { |
| 1661 | struct musb *musb = dev_to_musb(dev); |
| 1662 | unsigned long flags; |
David Brownell | 96a274d | 2008-11-24 13:06:47 +0200 | [diff] [blame] | 1663 | int status; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1664 | |
| 1665 | spin_lock_irqsave(&musb->lock, flags); |
David Brownell | 96a274d | 2008-11-24 13:06:47 +0200 | [diff] [blame] | 1666 | if (sysfs_streq(buf, "host")) |
| 1667 | status = musb_platform_set_mode(musb, MUSB_HOST); |
| 1668 | else if (sysfs_streq(buf, "peripheral")) |
| 1669 | status = musb_platform_set_mode(musb, MUSB_PERIPHERAL); |
| 1670 | else if (sysfs_streq(buf, "otg")) |
| 1671 | status = musb_platform_set_mode(musb, MUSB_OTG); |
| 1672 | else |
| 1673 | status = -EINVAL; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1674 | spin_unlock_irqrestore(&musb->lock, flags); |
| 1675 | |
David Brownell | 96a274d | 2008-11-24 13:06:47 +0200 | [diff] [blame] | 1676 | return (status == 0) ? n : status; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1677 | } |
| 1678 | static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store); |
| 1679 | |
| 1680 | static ssize_t |
| 1681 | musb_vbus_store(struct device *dev, struct device_attribute *attr, |
| 1682 | const char *buf, size_t n) |
| 1683 | { |
| 1684 | struct musb *musb = dev_to_musb(dev); |
| 1685 | unsigned long flags; |
| 1686 | unsigned long val; |
| 1687 | |
| 1688 | if (sscanf(buf, "%lu", &val) < 1) { |
Felipe Balbi | b3b1cc3 | 2009-12-15 11:08:43 +0200 | [diff] [blame] | 1689 | dev_err(dev, "Invalid VBUS timeout ms value\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1690 | return -EINVAL; |
| 1691 | } |
| 1692 | |
| 1693 | spin_lock_irqsave(&musb->lock, flags); |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 1694 | /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */ |
| 1695 | musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ; |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1696 | if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1697 | musb->is_active = 0; |
| 1698 | musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val)); |
| 1699 | spin_unlock_irqrestore(&musb->lock, flags); |
| 1700 | |
| 1701 | return n; |
| 1702 | } |
| 1703 | |
| 1704 | static ssize_t |
| 1705 | musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 1706 | { |
| 1707 | struct musb *musb = dev_to_musb(dev); |
| 1708 | unsigned long flags; |
| 1709 | unsigned long val; |
| 1710 | int vbus; |
| 1711 | |
| 1712 | spin_lock_irqsave(&musb->lock, flags); |
| 1713 | val = musb->a_wait_bcon; |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 1714 | /* FIXME get_vbus_status() is normally #defined as false... |
| 1715 | * and is effectively TUSB-specific. |
| 1716 | */ |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1717 | vbus = musb_platform_get_vbus_status(musb); |
| 1718 | spin_unlock_irqrestore(&musb->lock, flags); |
| 1719 | |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 1720 | return sprintf(buf, "Vbus %s, timeout %lu msec\n", |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1721 | vbus ? "on" : "off", val); |
| 1722 | } |
| 1723 | static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store); |
| 1724 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1725 | /* Gadget drivers can't know that a host is connected so they might want |
| 1726 | * to start SRP, but users can. This allows userspace to trigger SRP. |
| 1727 | */ |
| 1728 | static ssize_t |
| 1729 | musb_srp_store(struct device *dev, struct device_attribute *attr, |
| 1730 | const char *buf, size_t n) |
| 1731 | { |
| 1732 | struct musb *musb = dev_to_musb(dev); |
| 1733 | unsigned short srp; |
| 1734 | |
| 1735 | if (sscanf(buf, "%hu", &srp) != 1 |
| 1736 | || (srp != 1)) { |
Felipe Balbi | b3b1cc3 | 2009-12-15 11:08:43 +0200 | [diff] [blame] | 1737 | dev_err(dev, "SRP: Value must be 1\n"); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1738 | return -EINVAL; |
| 1739 | } |
| 1740 | |
| 1741 | if (srp == 1) |
| 1742 | musb_g_wakeup(musb); |
| 1743 | |
| 1744 | return n; |
| 1745 | } |
| 1746 | static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store); |
| 1747 | |
Felipe Balbi | 9437575 | 2009-12-15 11:08:38 +0200 | [diff] [blame] | 1748 | static struct attribute *musb_attributes[] = { |
| 1749 | &dev_attr_mode.attr, |
| 1750 | &dev_attr_vbus.attr, |
Felipe Balbi | 9437575 | 2009-12-15 11:08:38 +0200 | [diff] [blame] | 1751 | &dev_attr_srp.attr, |
Felipe Balbi | 9437575 | 2009-12-15 11:08:38 +0200 | [diff] [blame] | 1752 | NULL |
| 1753 | }; |
| 1754 | |
| 1755 | static const struct attribute_group musb_attr_group = { |
| 1756 | .attrs = musb_attributes, |
| 1757 | }; |
| 1758 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1759 | #endif /* sysfs */ |
| 1760 | |
| 1761 | /* Only used to provide driver mode change events */ |
| 1762 | static void musb_irq_work(struct work_struct *data) |
| 1763 | { |
| 1764 | struct musb *musb = container_of(data, struct musb, irq_work); |
| 1765 | static int old_state; |
| 1766 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1767 | if (musb->xceiv->state != old_state) { |
| 1768 | old_state = musb->xceiv->state; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1769 | sysfs_notify(&musb->controller->kobj, NULL, "mode"); |
| 1770 | } |
| 1771 | } |
| 1772 | |
| 1773 | /* -------------------------------------------------------------------------- |
| 1774 | * Init support |
| 1775 | */ |
| 1776 | |
| 1777 | static struct musb *__init |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1778 | allocate_instance(struct device *dev, |
| 1779 | struct musb_hdrc_config *config, void __iomem *mbase) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1780 | { |
| 1781 | struct musb *musb; |
| 1782 | struct musb_hw_ep *ep; |
| 1783 | int epnum; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1784 | struct usb_hcd *hcd; |
| 1785 | |
Kay Sievers | 427c4f3 | 2008-11-07 01:52:53 +0100 | [diff] [blame] | 1786 | hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1787 | if (!hcd) |
| 1788 | return NULL; |
| 1789 | /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */ |
| 1790 | |
| 1791 | musb = hcd_to_musb(hcd); |
| 1792 | INIT_LIST_HEAD(&musb->control); |
| 1793 | INIT_LIST_HEAD(&musb->in_bulk); |
| 1794 | INIT_LIST_HEAD(&musb->out_bulk); |
| 1795 | |
| 1796 | hcd->uses_new_polling = 1; |
Felipe Balbi | ec95d35 | 2011-02-24 10:36:53 +0200 | [diff] [blame] | 1797 | hcd->has_tt = 1; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1798 | |
| 1799 | musb->vbuserr_retry = VBUSERR_RETRY_COUNT; |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 1800 | musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON; |
Ming Lei | 456bb16 | 2010-12-21 21:16:11 +0800 | [diff] [blame] | 1801 | dev_set_drvdata(dev, musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1802 | musb->mregs = mbase; |
| 1803 | musb->ctrl_base = mbase; |
| 1804 | musb->nIrq = -ENODEV; |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1805 | musb->config = config; |
Kevin Hilman | 02582b9 | 2008-09-15 12:09:31 +0200 | [diff] [blame] | 1806 | BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1807 | for (epnum = 0, ep = musb->endpoints; |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1808 | epnum < musb->config->num_eps; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1809 | epnum++, ep++) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1810 | ep->musb = musb; |
| 1811 | ep->epnum = epnum; |
| 1812 | } |
| 1813 | |
| 1814 | musb->controller = dev; |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 1815 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1816 | return musb; |
| 1817 | } |
| 1818 | |
| 1819 | static void musb_free(struct musb *musb) |
| 1820 | { |
| 1821 | /* this has multiple entry modes. it handles fault cleanup after |
| 1822 | * probe(), where things may be partially set up, as well as rmmod |
| 1823 | * cleanup after everything's been de-activated. |
| 1824 | */ |
| 1825 | |
| 1826 | #ifdef CONFIG_SYSFS |
Felipe Balbi | 9437575 | 2009-12-15 11:08:38 +0200 | [diff] [blame] | 1827 | sysfs_remove_group(&musb->controller->kobj, &musb_attr_group); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1828 | #endif |
| 1829 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1830 | musb_gadget_cleanup(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1831 | |
Ajay Kumar Gupta | 97a3989 | 2009-01-24 17:56:39 -0800 | [diff] [blame] | 1832 | if (musb->nIrq >= 0) { |
| 1833 | if (musb->irq_wake) |
| 1834 | disable_irq_wake(musb->nIrq); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1835 | free_irq(musb->nIrq, musb); |
| 1836 | } |
| 1837 | if (is_dma_capable() && musb->dma_controller) { |
| 1838 | struct dma_controller *c = musb->dma_controller; |
| 1839 | |
| 1840 | (void) c->stop(c); |
| 1841 | dma_controller_destroy(c); |
| 1842 | } |
| 1843 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1844 | kfree(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1845 | } |
| 1846 | |
| 1847 | /* |
| 1848 | * Perform generic per-controller initialization. |
| 1849 | * |
| 1850 | * @pDevice: the controller (already clocked, etc) |
| 1851 | * @nIrq: irq |
| 1852 | * @mregs: virtual address of controller registers, |
| 1853 | * not yet corrected for platform-specific offsets |
| 1854 | */ |
| 1855 | static int __init |
| 1856 | musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) |
| 1857 | { |
| 1858 | int status; |
| 1859 | struct musb *musb; |
| 1860 | struct musb_hdrc_platform_data *plat = dev->platform_data; |
| 1861 | |
| 1862 | /* The driver might handle more features than the board; OK. |
| 1863 | * Fail when the board needs a feature that's not enabled. |
| 1864 | */ |
| 1865 | if (!plat) { |
| 1866 | dev_dbg(dev, "no platform_data?\n"); |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 1867 | status = -ENODEV; |
| 1868 | goto fail0; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1869 | } |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 1870 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1871 | /* allocate */ |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1872 | musb = allocate_instance(dev, plat->config, ctrl); |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 1873 | if (!musb) { |
| 1874 | status = -ENOMEM; |
| 1875 | goto fail0; |
| 1876 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1877 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 1878 | pm_runtime_use_autosuspend(musb->controller); |
| 1879 | pm_runtime_set_autosuspend_delay(musb->controller, 200); |
| 1880 | pm_runtime_enable(musb->controller); |
| 1881 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1882 | spin_lock_init(&musb->lock); |
| 1883 | musb->board_mode = plat->mode; |
| 1884 | musb->board_set_power = plat->set_power; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1885 | musb->min_power = plat->min_power; |
Felipe Balbi | f7ec943 | 2010-12-02 09:48:58 +0200 | [diff] [blame] | 1886 | musb->ops = plat->platform_ops; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1887 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1888 | /* The musb_platform_init() call: |
| 1889 | * - adjusts musb->mregs and musb->isr if needed, |
| 1890 | * - may initialize an integrated tranceiver |
| 1891 | * - initializes musb->xceiv, usually by otg_get_transceiver() |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1892 | * - stops powering VBUS |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1893 | * |
Joe Perches | 7c9d440 | 2011-06-23 11:39:20 -0700 | [diff] [blame] | 1894 | * There are various transceiver configurations. Blackfin, |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1895 | * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses |
| 1896 | * external/discrete ones in various flavors (twl4030 family, |
| 1897 | * isp1504, non-OTG, etc) mostly hooking up through ULPI. |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1898 | */ |
| 1899 | musb->isr = generic_interrupt; |
Hema Kalliguddi | ea65df5 | 2010-09-22 19:27:40 -0500 | [diff] [blame] | 1900 | status = musb_platform_init(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1901 | if (status < 0) |
Felipe Balbi | 0349176 | 2010-12-02 09:57:08 +0200 | [diff] [blame] | 1902 | goto fail1; |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 1903 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1904 | if (!musb->isr) { |
| 1905 | status = -ENODEV; |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 1906 | goto fail3; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1907 | } |
| 1908 | |
Heikki Krogerus | ffb865b | 2010-03-25 13:25:28 +0200 | [diff] [blame] | 1909 | if (!musb->xceiv->io_ops) { |
| 1910 | musb->xceiv->io_priv = musb->mregs; |
| 1911 | musb->xceiv->io_ops = &musb_ulpi_access; |
| 1912 | } |
| 1913 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1914 | #ifndef CONFIG_MUSB_PIO_ONLY |
| 1915 | if (use_dma && dev->dma_mask) { |
| 1916 | struct dma_controller *c; |
| 1917 | |
| 1918 | c = dma_controller_create(musb, musb->mregs); |
| 1919 | musb->dma_controller = c; |
| 1920 | if (c) |
| 1921 | (void) c->start(c); |
| 1922 | } |
| 1923 | #endif |
| 1924 | /* ideally this would be abstracted in platform setup */ |
| 1925 | if (!is_dma_capable() || !musb->dma_controller) |
| 1926 | dev->dma_mask = NULL; |
| 1927 | |
| 1928 | /* be sure interrupts are disabled before connecting ISR */ |
| 1929 | musb_platform_disable(musb); |
| 1930 | musb_generic_disable(musb); |
| 1931 | |
| 1932 | /* setup musb parts of the core (especially endpoints) */ |
Felipe Balbi | ca6d1b1 | 2008-08-08 12:40:54 +0300 | [diff] [blame] | 1933 | status = musb_core_init(plat->config->multipoint |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1934 | ? MUSB_CONTROLLER_MHDRC |
| 1935 | : MUSB_CONTROLLER_HDRC, musb); |
| 1936 | if (status < 0) |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 1937 | goto fail3; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1938 | |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 1939 | setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb); |
David Brownell | f7f9d63 | 2009-03-31 12:32:12 -0700 | [diff] [blame] | 1940 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1941 | /* Init IRQ workqueue before request_irq */ |
| 1942 | INIT_WORK(&musb->irq_work, musb_irq_work); |
| 1943 | |
| 1944 | /* attach to the IRQ */ |
Kay Sievers | 427c4f3 | 2008-11-07 01:52:53 +0100 | [diff] [blame] | 1945 | if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1946 | dev_err(dev, "request_irq %d failed!\n", nIrq); |
| 1947 | status = -ENODEV; |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 1948 | goto fail3; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1949 | } |
| 1950 | musb->nIrq = nIrq; |
| 1951 | /* FIXME this handles wakeup irqs wrong */ |
Felipe Balbi | c48a515 | 2008-11-24 13:06:53 +0200 | [diff] [blame] | 1952 | if (enable_irq_wake(nIrq) == 0) { |
| 1953 | musb->irq_wake = 1; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1954 | device_init_wakeup(dev, 1); |
Felipe Balbi | c48a515 | 2008-11-24 13:06:53 +0200 | [diff] [blame] | 1955 | } else { |
| 1956 | musb->irq_wake = 0; |
| 1957 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1958 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1959 | /* host side needs more setup */ |
| 1960 | if (is_host_enabled(musb)) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1961 | struct usb_hcd *hcd = musb_to_hcd(musb); |
| 1962 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1963 | otg_set_host(musb->xceiv, &hcd->self); |
| 1964 | |
| 1965 | if (is_otg_enabled(musb)) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1966 | hcd->self.otg_port = 1; |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1967 | musb->xceiv->host = &hcd->self; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1968 | hcd->power_budget = 2 * (plat->power ? : 250); |
Ajay Kumar Gupta | 5fc4e77 | 2009-12-28 13:40:42 +0200 | [diff] [blame] | 1969 | |
| 1970 | /* program PHY to use external vBus if required */ |
| 1971 | if (plat->extvbus) { |
Mike Frysinger | adb3ee4 | 2010-03-12 10:27:21 +0200 | [diff] [blame] | 1972 | u8 busctl = musb_read_ulpi_buscontrol(musb->mregs); |
Ajay Kumar Gupta | 5fc4e77 | 2009-12-28 13:40:42 +0200 | [diff] [blame] | 1973 | busctl |= MUSB_ULPI_USE_EXTVBUS; |
Mike Frysinger | adb3ee4 | 2010-03-12 10:27:21 +0200 | [diff] [blame] | 1974 | musb_write_ulpi_buscontrol(musb->mregs, busctl); |
Ajay Kumar Gupta | 5fc4e77 | 2009-12-28 13:40:42 +0200 | [diff] [blame] | 1975 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1976 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1977 | |
| 1978 | /* For the host-only role, we can activate right away. |
| 1979 | * (We expect the ID pin to be forcibly grounded!!) |
| 1980 | * Otherwise, wait till the gadget driver hooks up. |
| 1981 | */ |
| 1982 | if (!is_otg_enabled(musb) && is_host_enabled(musb)) { |
Anand Gadiyar | 07a8cdd | 2010-11-18 18:54:17 +0530 | [diff] [blame] | 1983 | struct usb_hcd *hcd = musb_to_hcd(musb); |
| 1984 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1985 | MUSB_HST_MODE(musb); |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 1986 | musb->xceiv->default_a = 1; |
| 1987 | musb->xceiv->state = OTG_STATE_A_IDLE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1988 | |
| 1989 | status = usb_add_hcd(musb_to_hcd(musb), -1, 0); |
| 1990 | |
Anand Gadiyar | 07a8cdd | 2010-11-18 18:54:17 +0530 | [diff] [blame] | 1991 | hcd->self.uses_pio_for_control = 1; |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 1992 | dev_dbg(musb->controller, "%s mode, status %d, devctl %02x %c\n", |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1993 | "HOST", status, |
| 1994 | musb_readb(musb->mregs, MUSB_DEVCTL), |
| 1995 | (musb_readb(musb->mregs, MUSB_DEVCTL) |
| 1996 | & MUSB_DEVCTL_BDEVICE |
| 1997 | ? 'B' : 'A')); |
| 1998 | |
| 1999 | } else /* peripheral is enabled */ { |
| 2000 | MUSB_DEV_MODE(musb); |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 2001 | musb->xceiv->default_a = 0; |
| 2002 | musb->xceiv->state = OTG_STATE_B_IDLE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2003 | |
| 2004 | status = musb_gadget_setup(musb); |
| 2005 | |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 2006 | dev_dbg(musb->controller, "%s mode, status %d, dev%02x\n", |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2007 | is_otg_enabled(musb) ? "OTG" : "PERIPHERAL", |
| 2008 | status, |
| 2009 | musb_readb(musb->mregs, MUSB_DEVCTL)); |
| 2010 | |
| 2011 | } |
Sergei Shtylyov | 461972d | 2010-03-25 13:14:32 +0200 | [diff] [blame] | 2012 | if (status < 0) |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 2013 | goto fail3; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2014 | |
Felipe Balbi | 7f7f9e2 | 2010-03-12 10:29:11 +0200 | [diff] [blame] | 2015 | status = musb_init_debugfs(musb); |
| 2016 | if (status < 0) |
Felipe Balbi | b0f9da7 | 2010-03-25 13:25:18 +0200 | [diff] [blame] | 2017 | goto fail4; |
Felipe Balbi | 7f7f9e2 | 2010-03-12 10:29:11 +0200 | [diff] [blame] | 2018 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2019 | #ifdef CONFIG_SYSFS |
Felipe Balbi | 9437575 | 2009-12-15 11:08:38 +0200 | [diff] [blame] | 2020 | status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group); |
Felipe Balbi | 28c2c51 | 2008-09-11 11:53:25 +0300 | [diff] [blame] | 2021 | if (status) |
Felipe Balbi | b0f9da7 | 2010-03-25 13:25:18 +0200 | [diff] [blame] | 2022 | goto fail5; |
Sergei Shtylyov | 461972d | 2010-03-25 13:14:32 +0200 | [diff] [blame] | 2023 | #endif |
Felipe Balbi | 28c2c51 | 2008-09-11 11:53:25 +0300 | [diff] [blame] | 2024 | |
Felipe Balbi | ab3bbfa | 2010-01-21 15:33:58 +0200 | [diff] [blame] | 2025 | dev_info(dev, "USB %s mode controller at %p using %s, IRQ %d\n", |
| 2026 | ({char *s; |
| 2027 | switch (musb->board_mode) { |
| 2028 | case MUSB_HOST: s = "Host"; break; |
| 2029 | case MUSB_PERIPHERAL: s = "Peripheral"; break; |
| 2030 | default: s = "OTG"; break; |
| 2031 | }; s; }), |
| 2032 | ctrl, |
| 2033 | (is_dma_capable() && musb->dma_controller) |
| 2034 | ? "DMA" : "PIO", |
| 2035 | musb->nIrq); |
| 2036 | |
Felipe Balbi | 28c2c51 | 2008-09-11 11:53:25 +0300 | [diff] [blame] | 2037 | return 0; |
| 2038 | |
Felipe Balbi | b0f9da7 | 2010-03-25 13:25:18 +0200 | [diff] [blame] | 2039 | fail5: |
| 2040 | musb_exit_debugfs(musb); |
| 2041 | |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 2042 | fail4: |
| 2043 | if (!is_otg_enabled(musb) && is_host_enabled(musb)) |
| 2044 | usb_remove_hcd(musb_to_hcd(musb)); |
| 2045 | else |
| 2046 | musb_gadget_cleanup(musb); |
| 2047 | |
| 2048 | fail3: |
| 2049 | if (musb->irq_wake) |
| 2050 | device_init_wakeup(dev, 0); |
Felipe Balbi | 28c2c51 | 2008-09-11 11:53:25 +0300 | [diff] [blame] | 2051 | musb_platform_exit(musb); |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 2052 | |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 2053 | fail1: |
Felipe Balbi | 28c2c51 | 2008-09-11 11:53:25 +0300 | [diff] [blame] | 2054 | dev_err(musb->controller, |
| 2055 | "musb_init_controller failed with status %d\n", status); |
| 2056 | |
Felipe Balbi | 28c2c51 | 2008-09-11 11:53:25 +0300 | [diff] [blame] | 2057 | musb_free(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2058 | |
Sergei Shtylyov | 34e2beb | 2010-03-25 13:14:33 +0200 | [diff] [blame] | 2059 | fail0: |
| 2060 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2061 | return status; |
| 2062 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2063 | } |
| 2064 | |
| 2065 | /*-------------------------------------------------------------------------*/ |
| 2066 | |
| 2067 | /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just |
| 2068 | * bridge to a platform device; this driver then suffices. |
| 2069 | */ |
| 2070 | |
| 2071 | #ifndef CONFIG_MUSB_PIO_ONLY |
| 2072 | static u64 *orig_dma_mask; |
| 2073 | #endif |
| 2074 | |
| 2075 | static int __init musb_probe(struct platform_device *pdev) |
| 2076 | { |
| 2077 | struct device *dev = &pdev->dev; |
Hema Kalliguddi | fcf173e | 2010-09-29 11:26:39 -0500 | [diff] [blame] | 2078 | int irq = platform_get_irq_byname(pdev, "mc"); |
Felipe Balbi | da5108e | 2010-01-21 15:33:57 +0200 | [diff] [blame] | 2079 | int status; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2080 | struct resource *iomem; |
| 2081 | void __iomem *base; |
| 2082 | |
| 2083 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Sergei Shtylyov | 541079d | 2010-12-10 21:03:29 +0300 | [diff] [blame] | 2084 | if (!iomem || irq <= 0) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2085 | return -ENODEV; |
| 2086 | |
Felipe Balbi | 195e9e4 | 2009-12-15 11:08:42 +0200 | [diff] [blame] | 2087 | base = ioremap(iomem->start, resource_size(iomem)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2088 | if (!base) { |
| 2089 | dev_err(dev, "ioremap failed\n"); |
| 2090 | return -ENOMEM; |
| 2091 | } |
| 2092 | |
| 2093 | #ifndef CONFIG_MUSB_PIO_ONLY |
| 2094 | /* clobbered by use_dma=n */ |
| 2095 | orig_dma_mask = dev->dma_mask; |
| 2096 | #endif |
Felipe Balbi | da5108e | 2010-01-21 15:33:57 +0200 | [diff] [blame] | 2097 | status = musb_init_controller(dev, irq, base); |
| 2098 | if (status < 0) |
| 2099 | iounmap(base); |
| 2100 | |
| 2101 | return status; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2102 | } |
| 2103 | |
Felipe Balbi | e3060b1 | 2009-12-15 11:08:41 +0200 | [diff] [blame] | 2104 | static int __exit musb_remove(struct platform_device *pdev) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2105 | { |
| 2106 | struct musb *musb = dev_to_musb(&pdev->dev); |
| 2107 | void __iomem *ctrl_base = musb->ctrl_base; |
| 2108 | |
| 2109 | /* this gets called on rmmod. |
| 2110 | * - Host mode: host may still be active |
| 2111 | * - Peripheral mode: peripheral is deactivated (or never-activated) |
| 2112 | * - OTG mode: both roles are deactivated (or never-activated) |
| 2113 | */ |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 2114 | pm_runtime_get_sync(musb->controller); |
Felipe Balbi | 7f7f9e2 | 2010-03-12 10:29:11 +0200 | [diff] [blame] | 2115 | musb_exit_debugfs(musb); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2116 | musb_shutdown(pdev); |
Sergei Shtylyov | 461972d | 2010-03-25 13:14:32 +0200 | [diff] [blame] | 2117 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 2118 | pm_runtime_put(musb->controller); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2119 | musb_free(musb); |
| 2120 | iounmap(ctrl_base); |
| 2121 | device_init_wakeup(&pdev->dev, 0); |
| 2122 | #ifndef CONFIG_MUSB_PIO_ONLY |
| 2123 | pdev->dev.dma_mask = orig_dma_mask; |
| 2124 | #endif |
| 2125 | return 0; |
| 2126 | } |
| 2127 | |
| 2128 | #ifdef CONFIG_PM |
| 2129 | |
Felipe Balbi | 3c8a5fc | 2010-12-02 12:28:39 +0200 | [diff] [blame] | 2130 | static void musb_save_context(struct musb *musb) |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2131 | { |
| 2132 | int i; |
| 2133 | void __iomem *musb_base = musb->mregs; |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2134 | void __iomem *epio; |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2135 | |
| 2136 | if (is_host_enabled(musb)) { |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2137 | musb->context.frame = musb_readw(musb_base, MUSB_FRAME); |
| 2138 | musb->context.testmode = musb_readb(musb_base, MUSB_TESTMODE); |
| 2139 | musb->context.busctl = musb_read_ulpi_buscontrol(musb->mregs); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2140 | } |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2141 | musb->context.power = musb_readb(musb_base, MUSB_POWER); |
| 2142 | musb->context.intrtxe = musb_readw(musb_base, MUSB_INTRTXE); |
| 2143 | musb->context.intrrxe = musb_readw(musb_base, MUSB_INTRRXE); |
| 2144 | musb->context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE); |
| 2145 | musb->context.index = musb_readb(musb_base, MUSB_INDEX); |
| 2146 | musb->context.devctl = musb_readb(musb_base, MUSB_DEVCTL); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2147 | |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2148 | for (i = 0; i < musb->config->num_eps; ++i) { |
Felipe Balbi | e4e5b136 | 2011-06-27 15:57:46 +0300 | [diff] [blame] | 2149 | struct musb_hw_ep *hw_ep; |
| 2150 | |
| 2151 | hw_ep = &musb->endpoints[i]; |
| 2152 | if (!hw_ep) |
| 2153 | continue; |
| 2154 | |
| 2155 | epio = hw_ep->regs; |
| 2156 | if (!epio) |
| 2157 | continue; |
| 2158 | |
Vikram Pandita | ea73755 | 2011-09-07 09:19:23 -0700 | [diff] [blame] | 2159 | musb_writeb(musb_base, MUSB_INDEX, i); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2160 | musb->context.index_regs[i].txmaxp = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2161 | musb_readw(epio, MUSB_TXMAXP); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2162 | musb->context.index_regs[i].txcsr = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2163 | musb_readw(epio, MUSB_TXCSR); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2164 | musb->context.index_regs[i].rxmaxp = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2165 | musb_readw(epio, MUSB_RXMAXP); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2166 | musb->context.index_regs[i].rxcsr = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2167 | musb_readw(epio, MUSB_RXCSR); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2168 | |
| 2169 | if (musb->dyn_fifo) { |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2170 | musb->context.index_regs[i].txfifoadd = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2171 | musb_read_txfifoadd(musb_base); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2172 | musb->context.index_regs[i].rxfifoadd = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2173 | musb_read_rxfifoadd(musb_base); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2174 | musb->context.index_regs[i].txfifosz = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2175 | musb_read_txfifosz(musb_base); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2176 | musb->context.index_regs[i].rxfifosz = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2177 | musb_read_rxfifosz(musb_base); |
| 2178 | } |
| 2179 | if (is_host_enabled(musb)) { |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2180 | musb->context.index_regs[i].txtype = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2181 | musb_readb(epio, MUSB_TXTYPE); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2182 | musb->context.index_regs[i].txinterval = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2183 | musb_readb(epio, MUSB_TXINTERVAL); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2184 | musb->context.index_regs[i].rxtype = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2185 | musb_readb(epio, MUSB_RXTYPE); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2186 | musb->context.index_regs[i].rxinterval = |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2187 | musb_readb(epio, MUSB_RXINTERVAL); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2188 | |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2189 | musb->context.index_regs[i].txfunaddr = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2190 | musb_read_txfunaddr(musb_base, i); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2191 | musb->context.index_regs[i].txhubaddr = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2192 | musb_read_txhubaddr(musb_base, i); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2193 | musb->context.index_regs[i].txhubport = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2194 | musb_read_txhubport(musb_base, i); |
| 2195 | |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2196 | musb->context.index_regs[i].rxfunaddr = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2197 | musb_read_rxfunaddr(musb_base, i); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2198 | musb->context.index_regs[i].rxhubaddr = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2199 | musb_read_rxhubaddr(musb_base, i); |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2200 | musb->context.index_regs[i].rxhubport = |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2201 | musb_read_rxhubport(musb_base, i); |
| 2202 | } |
| 2203 | } |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2204 | } |
| 2205 | |
Felipe Balbi | 3c8a5fc | 2010-12-02 12:28:39 +0200 | [diff] [blame] | 2206 | static void musb_restore_context(struct musb *musb) |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2207 | { |
| 2208 | int i; |
| 2209 | void __iomem *musb_base = musb->mregs; |
| 2210 | void __iomem *ep_target_regs; |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2211 | void __iomem *epio; |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2212 | |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2213 | if (is_host_enabled(musb)) { |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2214 | musb_writew(musb_base, MUSB_FRAME, musb->context.frame); |
| 2215 | musb_writeb(musb_base, MUSB_TESTMODE, musb->context.testmode); |
| 2216 | musb_write_ulpi_buscontrol(musb->mregs, musb->context.busctl); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2217 | } |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2218 | musb_writeb(musb_base, MUSB_POWER, musb->context.power); |
| 2219 | musb_writew(musb_base, MUSB_INTRTXE, musb->context.intrtxe); |
| 2220 | musb_writew(musb_base, MUSB_INTRRXE, musb->context.intrrxe); |
| 2221 | musb_writeb(musb_base, MUSB_INTRUSBE, musb->context.intrusbe); |
| 2222 | musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2223 | |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2224 | for (i = 0; i < musb->config->num_eps; ++i) { |
Felipe Balbi | e4e5b136 | 2011-06-27 15:57:46 +0300 | [diff] [blame] | 2225 | struct musb_hw_ep *hw_ep; |
| 2226 | |
| 2227 | hw_ep = &musb->endpoints[i]; |
| 2228 | if (!hw_ep) |
| 2229 | continue; |
| 2230 | |
| 2231 | epio = hw_ep->regs; |
| 2232 | if (!epio) |
| 2233 | continue; |
| 2234 | |
Vikram Pandita | ea73755 | 2011-09-07 09:19:23 -0700 | [diff] [blame] | 2235 | musb_writeb(musb_base, MUSB_INDEX, i); |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2236 | musb_writew(epio, MUSB_TXMAXP, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2237 | musb->context.index_regs[i].txmaxp); |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2238 | musb_writew(epio, MUSB_TXCSR, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2239 | musb->context.index_regs[i].txcsr); |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2240 | musb_writew(epio, MUSB_RXMAXP, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2241 | musb->context.index_regs[i].rxmaxp); |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2242 | musb_writew(epio, MUSB_RXCSR, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2243 | musb->context.index_regs[i].rxcsr); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2244 | |
| 2245 | if (musb->dyn_fifo) { |
| 2246 | musb_write_txfifosz(musb_base, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2247 | musb->context.index_regs[i].txfifosz); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2248 | musb_write_rxfifosz(musb_base, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2249 | musb->context.index_regs[i].rxfifosz); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2250 | musb_write_txfifoadd(musb_base, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2251 | musb->context.index_regs[i].txfifoadd); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2252 | musb_write_rxfifoadd(musb_base, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2253 | musb->context.index_regs[i].rxfifoadd); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2254 | } |
| 2255 | |
| 2256 | if (is_host_enabled(musb)) { |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2257 | musb_writeb(epio, MUSB_TXTYPE, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2258 | musb->context.index_regs[i].txtype); |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2259 | musb_writeb(epio, MUSB_TXINTERVAL, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2260 | musb->context.index_regs[i].txinterval); |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2261 | musb_writeb(epio, MUSB_RXTYPE, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2262 | musb->context.index_regs[i].rxtype); |
Bob Liu | ae9b2ad | 2010-09-24 13:44:07 +0300 | [diff] [blame] | 2263 | musb_writeb(epio, MUSB_RXINTERVAL, |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2264 | |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2265 | musb->context.index_regs[i].rxinterval); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2266 | musb_write_txfunaddr(musb_base, i, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2267 | musb->context.index_regs[i].txfunaddr); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2268 | musb_write_txhubaddr(musb_base, i, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2269 | musb->context.index_regs[i].txhubaddr); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2270 | musb_write_txhubport(musb_base, i, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2271 | musb->context.index_regs[i].txhubport); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2272 | |
| 2273 | ep_target_regs = |
| 2274 | musb_read_target_reg_base(i, musb_base); |
| 2275 | |
| 2276 | musb_write_rxfunaddr(ep_target_regs, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2277 | musb->context.index_regs[i].rxfunaddr); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2278 | musb_write_rxhubaddr(ep_target_regs, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2279 | musb->context.index_regs[i].rxhubaddr); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2280 | musb_write_rxhubport(ep_target_regs, |
Felipe Balbi | 7421107 | 2010-12-01 13:53:27 +0200 | [diff] [blame] | 2281 | musb->context.index_regs[i].rxhubport); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2282 | } |
| 2283 | } |
Ajay Kumar Gupta | 3c5fec7 | 2011-07-08 15:06:13 +0530 | [diff] [blame] | 2284 | musb_writeb(musb_base, MUSB_INDEX, musb->context.index); |
Ajay Kumar Gupta | 4f712e0 | 2010-01-21 15:33:52 +0200 | [diff] [blame] | 2285 | } |
| 2286 | |
Magnus Damm | 48fea96 | 2009-07-08 13:22:56 +0200 | [diff] [blame] | 2287 | static int musb_suspend(struct device *dev) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2288 | { |
Felipe Balbi | 8220796 | 2011-06-27 15:57:12 +0300 | [diff] [blame] | 2289 | struct musb *musb = dev_to_musb(dev); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2290 | unsigned long flags; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2291 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2292 | spin_lock_irqsave(&musb->lock, flags); |
| 2293 | |
| 2294 | if (is_peripheral_active(musb)) { |
| 2295 | /* FIXME force disconnect unless we know USB will wake |
| 2296 | * the system up quickly enough to respond ... |
| 2297 | */ |
| 2298 | } else if (is_host_active(musb)) { |
| 2299 | /* we know all the children are suspended; sometimes |
| 2300 | * they will even be wakeup-enabled. |
| 2301 | */ |
| 2302 | } |
| 2303 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2304 | spin_unlock_irqrestore(&musb->lock, flags); |
| 2305 | return 0; |
| 2306 | } |
| 2307 | |
Magnus Damm | 48fea96 | 2009-07-08 13:22:56 +0200 | [diff] [blame] | 2308 | static int musb_resume_noirq(struct device *dev) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2309 | { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2310 | /* for static cmos like DaVinci, register values were preserved |
Kim Kyuwon | 0ec8fd7 | 2009-03-26 18:56:51 -0700 | [diff] [blame] | 2311 | * unless for some reason the whole soc powered down or the USB |
| 2312 | * module got reset through the PSC (vs just being disabled). |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2313 | */ |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2314 | return 0; |
| 2315 | } |
| 2316 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 2317 | static int musb_runtime_suspend(struct device *dev) |
| 2318 | { |
| 2319 | struct musb *musb = dev_to_musb(dev); |
| 2320 | |
| 2321 | musb_save_context(musb); |
| 2322 | |
| 2323 | return 0; |
| 2324 | } |
| 2325 | |
| 2326 | static int musb_runtime_resume(struct device *dev) |
| 2327 | { |
| 2328 | struct musb *musb = dev_to_musb(dev); |
| 2329 | static int first = 1; |
| 2330 | |
| 2331 | /* |
| 2332 | * When pm_runtime_get_sync called for the first time in driver |
| 2333 | * init, some of the structure is still not initialized which is |
| 2334 | * used in restore function. But clock needs to be |
| 2335 | * enabled before any register access, so |
| 2336 | * pm_runtime_get_sync has to be called. |
| 2337 | * Also context restore without save does not make |
| 2338 | * any sense |
| 2339 | */ |
| 2340 | if (!first) |
| 2341 | musb_restore_context(musb); |
| 2342 | first = 0; |
| 2343 | |
| 2344 | return 0; |
| 2345 | } |
| 2346 | |
Alexey Dobriyan | 4714521 | 2009-12-14 18:00:08 -0800 | [diff] [blame] | 2347 | static const struct dev_pm_ops musb_dev_pm_ops = { |
Magnus Damm | 48fea96 | 2009-07-08 13:22:56 +0200 | [diff] [blame] | 2348 | .suspend = musb_suspend, |
| 2349 | .resume_noirq = musb_resume_noirq, |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 2350 | .runtime_suspend = musb_runtime_suspend, |
| 2351 | .runtime_resume = musb_runtime_resume, |
Magnus Damm | 48fea96 | 2009-07-08 13:22:56 +0200 | [diff] [blame] | 2352 | }; |
| 2353 | |
| 2354 | #define MUSB_DEV_PM_OPS (&musb_dev_pm_ops) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2355 | #else |
Magnus Damm | 48fea96 | 2009-07-08 13:22:56 +0200 | [diff] [blame] | 2356 | #define MUSB_DEV_PM_OPS NULL |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2357 | #endif |
| 2358 | |
| 2359 | static struct platform_driver musb_driver = { |
| 2360 | .driver = { |
| 2361 | .name = (char *)musb_driver_name, |
| 2362 | .bus = &platform_bus_type, |
| 2363 | .owner = THIS_MODULE, |
Magnus Damm | 48fea96 | 2009-07-08 13:22:56 +0200 | [diff] [blame] | 2364 | .pm = MUSB_DEV_PM_OPS, |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2365 | }, |
Felipe Balbi | e3060b1 | 2009-12-15 11:08:41 +0200 | [diff] [blame] | 2366 | .remove = __exit_p(musb_remove), |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2367 | .shutdown = musb_shutdown, |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2368 | }; |
| 2369 | |
| 2370 | /*-------------------------------------------------------------------------*/ |
| 2371 | |
| 2372 | static int __init musb_init(void) |
| 2373 | { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2374 | if (usb_disabled()) |
| 2375 | return 0; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2376 | |
| 2377 | pr_info("%s: version " MUSB_VERSION ", " |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2378 | "?dma?" |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2379 | ", " |
Felipe Balbi | 6228596 | 2011-06-22 17:28:09 +0300 | [diff] [blame] | 2380 | "otg (peripheral+host)", |
Felipe Balbi | 5c8a86e | 2011-05-11 12:44:08 +0300 | [diff] [blame] | 2381 | musb_driver_name); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2382 | return platform_driver_probe(&musb_driver, musb_probe); |
| 2383 | } |
| 2384 | |
David Brownell | 34f32c9 | 2009-02-20 13:45:17 -0800 | [diff] [blame] | 2385 | /* make us init after usbcore and i2c (transceivers, regulators, etc) |
| 2386 | * and before usb gadget and host-side drivers start to register |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2387 | */ |
David Brownell | 34f32c9 | 2009-02-20 13:45:17 -0800 | [diff] [blame] | 2388 | fs_initcall(musb_init); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 2389 | |
| 2390 | static void __exit musb_cleanup(void) |
| 2391 | { |
| 2392 | platform_driver_unregister(&musb_driver); |
| 2393 | } |
| 2394 | module_exit(musb_cleanup); |