Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005-2007 by Texas Instruments |
| 3 | * Some code has been taken from tusb6010.c |
| 4 | * Copyrights for that are attributable to: |
| 5 | * Copyright (C) 2006 Nokia Corporation |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 6 | * Tony Lindgren <tony@atomide.com> |
| 7 | * |
| 8 | * This file is part of the Inventra Controller Driver for Linux. |
| 9 | * |
| 10 | * The Inventra Controller Driver for Linux is free software; you |
| 11 | * can redistribute it and/or modify it under the terms of the GNU |
| 12 | * General Public License version 2 as published by the Free Software |
| 13 | * Foundation. |
| 14 | * |
| 15 | * The Inventra Controller Driver for Linux is distributed in |
| 16 | * the hope that it will be useful, but WITHOUT ANY WARRANTY; |
| 17 | * without even the implied warranty of MERCHANTABILITY or |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 19 | * License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with The Inventra Controller Driver for Linux ; if not, |
| 23 | * write to the Free Software Foundation, Inc., 59 Temple Place, |
| 24 | * Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | */ |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/sched.h> |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 30 | #include <linux/init.h> |
| 31 | #include <linux/list.h> |
| 32 | #include <linux/clk.h> |
| 33 | #include <linux/io.h> |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 34 | #include <linux/platform_device.h> |
| 35 | #include <linux/dma-mapping.h> |
Hema HK | 207b0e1 | 2011-02-17 12:07:22 +0530 | [diff] [blame] | 36 | #include <linux/pm_runtime.h> |
| 37 | #include <linux/err.h> |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 38 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 39 | #include "musb_core.h" |
| 40 | #include "omap2430.h" |
| 41 | |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 42 | struct omap2430_glue { |
| 43 | struct device *dev; |
| 44 | struct platform_device *musb; |
| 45 | }; |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 46 | #define glue_to_musb(g) platform_get_drvdata(g->musb) |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 47 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 48 | static struct timer_list musb_idle_timer; |
| 49 | |
| 50 | static void musb_do_idle(unsigned long _musb) |
| 51 | { |
| 52 | struct musb *musb = (void *)_musb; |
| 53 | unsigned long flags; |
Ajay Kumar Gupta | eef767b | 2008-10-29 15:10:38 +0200 | [diff] [blame] | 54 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 55 | u8 power; |
Ajay Kumar Gupta | eef767b | 2008-10-29 15:10:38 +0200 | [diff] [blame] | 56 | #endif |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 57 | u8 devctl; |
| 58 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 59 | spin_lock_irqsave(&musb->lock, flags); |
| 60 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 61 | switch (musb->xceiv->state) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 62 | case OTG_STATE_A_WAIT_BCON: |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 63 | |
| 64 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
| 65 | if (devctl & MUSB_DEVCTL_BDEVICE) { |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 66 | musb->xceiv->state = OTG_STATE_B_IDLE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 67 | MUSB_DEV_MODE(musb); |
| 68 | } else { |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 69 | musb->xceiv->state = OTG_STATE_A_IDLE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 70 | MUSB_HST_MODE(musb); |
| 71 | } |
| 72 | break; |
| 73 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
| 74 | case OTG_STATE_A_SUSPEND: |
| 75 | /* finish RESUME signaling? */ |
| 76 | if (musb->port1_status & MUSB_PORT_STAT_RESUME) { |
| 77 | power = musb_readb(musb->mregs, MUSB_POWER); |
| 78 | power &= ~MUSB_POWER_RESUME; |
| 79 | DBG(1, "root port resume stopped, power %02x\n", power); |
| 80 | musb_writeb(musb->mregs, MUSB_POWER, power); |
| 81 | musb->is_active = 1; |
| 82 | musb->port1_status &= ~(USB_PORT_STAT_SUSPEND |
| 83 | | MUSB_PORT_STAT_RESUME); |
| 84 | musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16; |
| 85 | usb_hcd_poll_rh_status(musb_to_hcd(musb)); |
| 86 | /* NOTE: it might really be A_WAIT_BCON ... */ |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 87 | musb->xceiv->state = OTG_STATE_A_HOST; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 88 | } |
| 89 | break; |
| 90 | #endif |
| 91 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
| 92 | case OTG_STATE_A_HOST: |
| 93 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
| 94 | if (devctl & MUSB_DEVCTL_BDEVICE) |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 95 | musb->xceiv->state = OTG_STATE_B_IDLE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 96 | else |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 97 | musb->xceiv->state = OTG_STATE_A_WAIT_BCON; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 98 | #endif |
| 99 | default: |
| 100 | break; |
| 101 | } |
| 102 | spin_unlock_irqrestore(&musb->lock, flags); |
| 103 | } |
| 104 | |
| 105 | |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 106 | static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 107 | { |
| 108 | unsigned long default_timeout = jiffies + msecs_to_jiffies(3); |
| 109 | static unsigned long last_timer; |
| 110 | |
| 111 | if (timeout == 0) |
| 112 | timeout = default_timeout; |
| 113 | |
| 114 | /* Never idle if active, or when VBUS timeout is not set as host */ |
| 115 | if (musb->is_active || ((musb->a_wait_bcon == 0) |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 116 | && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 117 | DBG(4, "%s active, deleting timer\n", otg_state_string(musb)); |
| 118 | del_timer(&musb_idle_timer); |
| 119 | last_timer = jiffies; |
| 120 | return; |
| 121 | } |
| 122 | |
| 123 | if (time_after(last_timer, timeout)) { |
| 124 | if (!timer_pending(&musb_idle_timer)) |
| 125 | last_timer = timeout; |
| 126 | else { |
| 127 | DBG(4, "Longer idle timer already pending, ignoring\n"); |
| 128 | return; |
| 129 | } |
| 130 | } |
| 131 | last_timer = timeout; |
| 132 | |
| 133 | DBG(4, "%s inactive, for idle timer for %lu ms\n", |
| 134 | otg_state_string(musb), |
| 135 | (unsigned long)jiffies_to_msecs(timeout - jiffies)); |
| 136 | mod_timer(&musb_idle_timer, timeout); |
| 137 | } |
| 138 | |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 139 | static void omap2430_musb_set_vbus(struct musb *musb, int is_on) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 140 | { |
| 141 | u8 devctl; |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 142 | unsigned long timeout = jiffies + msecs_to_jiffies(1000); |
| 143 | int ret = 1; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 144 | /* HDRC controls CPEN, but beware current surges during device |
| 145 | * connect. They can trigger transient overcurrent conditions |
| 146 | * that must be ignored. |
| 147 | */ |
| 148 | |
| 149 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
| 150 | |
| 151 | if (is_on) { |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 152 | if (musb->xceiv->state == OTG_STATE_A_IDLE) { |
| 153 | /* start the session */ |
| 154 | devctl |= MUSB_DEVCTL_SESSION; |
| 155 | musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); |
| 156 | /* |
| 157 | * Wait for the musb to set as A device to enable the |
| 158 | * VBUS |
| 159 | */ |
| 160 | while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) { |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 161 | |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 162 | cpu_relax(); |
| 163 | |
| 164 | if (time_after(jiffies, timeout)) { |
| 165 | dev_err(musb->controller, |
| 166 | "configured as A device timeout"); |
| 167 | ret = -EINVAL; |
| 168 | break; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | if (ret && musb->xceiv->set_vbus) |
| 173 | otg_set_vbus(musb->xceiv, 1); |
| 174 | } else { |
| 175 | musb->is_active = 1; |
| 176 | musb->xceiv->default_a = 1; |
| 177 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; |
| 178 | devctl |= MUSB_DEVCTL_SESSION; |
| 179 | MUSB_HST_MODE(musb); |
| 180 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 181 | } else { |
| 182 | musb->is_active = 0; |
| 183 | |
| 184 | /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and |
| 185 | * jumping right to B_IDLE... |
| 186 | */ |
| 187 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 188 | musb->xceiv->default_a = 0; |
| 189 | musb->xceiv->state = OTG_STATE_B_IDLE; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 190 | devctl &= ~MUSB_DEVCTL_SESSION; |
| 191 | |
| 192 | MUSB_DEV_MODE(musb); |
| 193 | } |
| 194 | musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); |
| 195 | |
| 196 | DBG(1, "VBUS %s, devctl %02x " |
| 197 | /* otg %3x conf %08x prcm %08x */ "\n", |
| 198 | otg_state_string(musb), |
| 199 | musb_readb(musb->mregs, MUSB_DEVCTL)); |
| 200 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 201 | |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 202 | static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 203 | { |
| 204 | u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
| 205 | |
| 206 | devctl |= MUSB_DEVCTL_SESSION; |
| 207 | musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); |
| 208 | |
David Brownell | 96a274d | 2008-11-24 13:06:47 +0200 | [diff] [blame] | 209 | return 0; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 210 | } |
| 211 | |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 212 | static inline void omap2430_low_level_exit(struct musb *musb) |
| 213 | { |
| 214 | u32 l; |
| 215 | |
| 216 | /* in any role */ |
| 217 | l = musb_readl(musb->mregs, OTG_FORCESTDBY); |
| 218 | l |= ENABLEFORCE; /* enable MSTANDBY */ |
| 219 | musb_writel(musb->mregs, OTG_FORCESTDBY, l); |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | static inline void omap2430_low_level_init(struct musb *musb) |
| 223 | { |
| 224 | u32 l; |
| 225 | |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 226 | l = musb_readl(musb->mregs, OTG_FORCESTDBY); |
| 227 | l &= ~ENABLEFORCE; /* disable MSTANDBY */ |
| 228 | musb_writel(musb->mregs, OTG_FORCESTDBY, l); |
| 229 | } |
| 230 | |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 231 | /* blocking notifier support */ |
| 232 | static int musb_otg_notifications(struct notifier_block *nb, |
| 233 | unsigned long event, void *unused) |
| 234 | { |
| 235 | struct musb *musb = container_of(nb, struct musb, nb); |
| 236 | struct device *dev = musb->controller; |
| 237 | struct musb_hdrc_platform_data *pdata = dev->platform_data; |
| 238 | struct omap_musb_board_data *data = pdata->board_data; |
| 239 | |
| 240 | switch (event) { |
| 241 | case USB_EVENT_ID: |
| 242 | DBG(4, "ID GND\n"); |
| 243 | |
| 244 | if (is_otg_enabled(musb)) { |
| 245 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC |
| 246 | if (musb->gadget_driver) { |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 247 | pm_runtime_get_sync(musb->controller); |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 248 | otg_init(musb->xceiv); |
Hema HK | 70045c5 | 2011-02-28 15:05:29 +0530 | [diff] [blame] | 249 | omap2430_musb_set_vbus(musb, 1); |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 250 | } |
| 251 | #endif |
| 252 | } else { |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 253 | pm_runtime_get_sync(musb->controller); |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 254 | otg_init(musb->xceiv); |
Hema HK | 70045c5 | 2011-02-28 15:05:29 +0530 | [diff] [blame] | 255 | omap2430_musb_set_vbus(musb, 1); |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 256 | } |
| 257 | break; |
| 258 | |
| 259 | case USB_EVENT_VBUS: |
| 260 | DBG(4, "VBUS Connect\n"); |
| 261 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 262 | if (musb->gadget_driver) |
| 263 | pm_runtime_get_sync(musb->controller); |
| 264 | |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 265 | otg_init(musb->xceiv); |
| 266 | break; |
| 267 | |
| 268 | case USB_EVENT_NONE: |
| 269 | DBG(4, "VBUS Disconnect\n"); |
| 270 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 271 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC |
| 272 | if (is_otg_enabled(musb)) |
| 273 | if (musb->gadget_driver) |
| 274 | #endif |
| 275 | { |
| 276 | pm_runtime_mark_last_busy(musb->controller); |
| 277 | pm_runtime_put_autosuspend(musb->controller); |
| 278 | } |
| 279 | |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 280 | if (data->interface_type == MUSB_INTERFACE_UTMI) { |
| 281 | if (musb->xceiv->set_vbus) |
| 282 | otg_set_vbus(musb->xceiv, 0); |
| 283 | } |
| 284 | otg_shutdown(musb->xceiv); |
| 285 | break; |
| 286 | default: |
| 287 | DBG(4, "ID float\n"); |
| 288 | return NOTIFY_DONE; |
| 289 | } |
| 290 | |
| 291 | return NOTIFY_OK; |
| 292 | } |
| 293 | |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 294 | static int omap2430_musb_init(struct musb *musb) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 295 | { |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 296 | u32 l, status = 0; |
Hema Kalliguddi | ea65df5 | 2010-09-22 19:27:40 -0500 | [diff] [blame] | 297 | struct device *dev = musb->controller; |
| 298 | struct musb_hdrc_platform_data *plat = dev->platform_data; |
| 299 | struct omap_musb_board_data *data = plat->board_data; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 300 | |
David Brownell | 84e250f | 2009-03-31 12:30:04 -0700 | [diff] [blame] | 301 | /* We require some kind of external transceiver, hooked |
| 302 | * up through ULPI. TWL4030-family PMICs include one, |
| 303 | * which needs a driver, drivers aren't always needed. |
| 304 | */ |
| 305 | musb->xceiv = otg_get_transceiver(); |
| 306 | if (!musb->xceiv) { |
| 307 | pr_err("HS USB OTG: no transceiver configured\n"); |
| 308 | return -ENODEV; |
| 309 | } |
| 310 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 311 | status = pm_runtime_get_sync(dev); |
| 312 | if (status < 0) { |
| 313 | dev_err(dev, "pm_runtime_get_sync FAILED"); |
| 314 | goto err1; |
| 315 | } |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 316 | |
Felipe Balbi | 8573e6a | 2010-01-21 15:33:53 +0200 | [diff] [blame] | 317 | l = musb_readl(musb->mregs, OTG_INTERFSEL); |
Maulik Mankad | de2e1b0 | 2010-03-12 10:29:07 +0200 | [diff] [blame] | 318 | |
| 319 | if (data->interface_type == MUSB_INTERFACE_UTMI) { |
| 320 | /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */ |
| 321 | l &= ~ULPI_12PIN; /* Disable ULPI */ |
| 322 | l |= UTMI_8BIT; /* Enable UTMI */ |
| 323 | } else { |
| 324 | l |= ULPI_12PIN; |
| 325 | } |
| 326 | |
Felipe Balbi | 8573e6a | 2010-01-21 15:33:53 +0200 | [diff] [blame] | 327 | musb_writel(musb->mregs, OTG_INTERFSEL, l); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 328 | |
| 329 | pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, " |
| 330 | "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n", |
Felipe Balbi | 8573e6a | 2010-01-21 15:33:53 +0200 | [diff] [blame] | 331 | musb_readl(musb->mregs, OTG_REVISION), |
| 332 | musb_readl(musb->mregs, OTG_SYSCONFIG), |
| 333 | musb_readl(musb->mregs, OTG_SYSSTATUS), |
| 334 | musb_readl(musb->mregs, OTG_INTERFSEL), |
| 335 | musb_readl(musb->mregs, OTG_SIMENABLE)); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 336 | |
Hema HK | 594632e | 2010-12-10 18:10:51 +0530 | [diff] [blame] | 337 | musb->nb.notifier_call = musb_otg_notifications; |
| 338 | status = otg_register_notifier(musb->xceiv, &musb->nb); |
| 339 | |
| 340 | if (status) |
| 341 | DBG(1, "notification register failed\n"); |
| 342 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 343 | setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb); |
| 344 | |
| 345 | return 0; |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 346 | |
| 347 | err1: |
| 348 | pm_runtime_disable(dev); |
| 349 | return status; |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 350 | } |
| 351 | |
Hema HK | 002eda1 | 2011-02-17 12:06:10 +0530 | [diff] [blame] | 352 | static void omap2430_musb_enable(struct musb *musb) |
| 353 | { |
| 354 | u8 devctl; |
| 355 | unsigned long timeout = jiffies + msecs_to_jiffies(1000); |
| 356 | struct device *dev = musb->controller; |
| 357 | struct musb_hdrc_platform_data *pdata = dev->platform_data; |
| 358 | struct omap_musb_board_data *data = pdata->board_data; |
| 359 | |
| 360 | switch (musb->xceiv->last_event) { |
| 361 | |
| 362 | case USB_EVENT_ID: |
| 363 | otg_init(musb->xceiv); |
| 364 | if (data->interface_type == MUSB_INTERFACE_UTMI) { |
| 365 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); |
| 366 | /* start the session */ |
| 367 | devctl |= MUSB_DEVCTL_SESSION; |
| 368 | musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); |
| 369 | while (musb_readb(musb->mregs, MUSB_DEVCTL) & |
| 370 | MUSB_DEVCTL_BDEVICE) { |
| 371 | cpu_relax(); |
| 372 | |
| 373 | if (time_after(jiffies, timeout)) { |
| 374 | dev_err(musb->controller, |
| 375 | "configured as A device timeout"); |
| 376 | break; |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | break; |
| 381 | |
| 382 | case USB_EVENT_VBUS: |
| 383 | otg_init(musb->xceiv); |
| 384 | break; |
| 385 | |
| 386 | default: |
| 387 | break; |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | static void omap2430_musb_disable(struct musb *musb) |
| 392 | { |
| 393 | if (musb->xceiv->last_event) |
| 394 | otg_shutdown(musb->xceiv); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 395 | } |
| 396 | |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 397 | static int omap2430_musb_exit(struct musb *musb) |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 398 | { |
Johan Hovold | 19b9a83 | 2011-02-11 16:57:08 +0100 | [diff] [blame] | 399 | del_timer_sync(&musb_idle_timer); |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 400 | |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 401 | omap2430_low_level_exit(musb); |
Sergei Shtylyov | f405387 | 2010-09-29 09:54:29 +0300 | [diff] [blame] | 402 | otg_put_transceiver(musb->xceiv); |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 403 | |
Felipe Balbi | 550a737 | 2008-07-24 12:27:36 +0300 | [diff] [blame] | 404 | return 0; |
| 405 | } |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 406 | |
Felipe Balbi | f7ec943 | 2010-12-02 09:48:58 +0200 | [diff] [blame] | 407 | static const struct musb_platform_ops omap2430_ops = { |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 408 | .init = omap2430_musb_init, |
| 409 | .exit = omap2430_musb_exit, |
| 410 | |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 411 | .set_mode = omap2430_musb_set_mode, |
| 412 | .try_idle = omap2430_musb_try_idle, |
| 413 | |
| 414 | .set_vbus = omap2430_musb_set_vbus, |
Hema HK | 002eda1 | 2011-02-17 12:06:10 +0530 | [diff] [blame] | 415 | |
| 416 | .enable = omap2430_musb_enable, |
| 417 | .disable = omap2430_musb_disable, |
Felipe Balbi | 743411b | 2010-12-01 13:22:05 +0200 | [diff] [blame] | 418 | }; |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 419 | |
| 420 | static u64 omap2430_dmamask = DMA_BIT_MASK(32); |
| 421 | |
| 422 | static int __init omap2430_probe(struct platform_device *pdev) |
| 423 | { |
| 424 | struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; |
| 425 | struct platform_device *musb; |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 426 | struct omap2430_glue *glue; |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 427 | int ret = -ENOMEM; |
| 428 | |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 429 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); |
| 430 | if (!glue) { |
| 431 | dev_err(&pdev->dev, "failed to allocate glue context\n"); |
| 432 | goto err0; |
| 433 | } |
| 434 | |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 435 | musb = platform_device_alloc("musb-hdrc", -1); |
| 436 | if (!musb) { |
| 437 | dev_err(&pdev->dev, "failed to allocate musb device\n"); |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 438 | goto err1; |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | musb->dev.parent = &pdev->dev; |
| 442 | musb->dev.dma_mask = &omap2430_dmamask; |
| 443 | musb->dev.coherent_dma_mask = omap2430_dmamask; |
| 444 | |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 445 | glue->dev = &pdev->dev; |
| 446 | glue->musb = musb; |
| 447 | |
Felipe Balbi | f7ec943 | 2010-12-02 09:48:58 +0200 | [diff] [blame] | 448 | pdata->platform_ops = &omap2430_ops; |
| 449 | |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 450 | platform_set_drvdata(pdev, glue); |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 451 | |
| 452 | ret = platform_device_add_resources(musb, pdev->resource, |
| 453 | pdev->num_resources); |
| 454 | if (ret) { |
| 455 | dev_err(&pdev->dev, "failed to add resources\n"); |
Hema HK | 207b0e1 | 2011-02-17 12:07:22 +0530 | [diff] [blame] | 456 | goto err2; |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); |
| 460 | if (ret) { |
| 461 | dev_err(&pdev->dev, "failed to add platform_data\n"); |
Hema HK | 207b0e1 | 2011-02-17 12:07:22 +0530 | [diff] [blame] | 462 | goto err2; |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | ret = platform_device_add(musb); |
| 466 | if (ret) { |
| 467 | dev_err(&pdev->dev, "failed to register musb device\n"); |
Hema HK | 207b0e1 | 2011-02-17 12:07:22 +0530 | [diff] [blame] | 468 | goto err2; |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 469 | } |
| 470 | |
Hema HK | 207b0e1 | 2011-02-17 12:07:22 +0530 | [diff] [blame] | 471 | pm_runtime_enable(&pdev->dev); |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 472 | |
| 473 | return 0; |
| 474 | |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 475 | err2: |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 476 | platform_device_put(musb); |
| 477 | |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 478 | err1: |
| 479 | kfree(glue); |
| 480 | |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 481 | err0: |
| 482 | return ret; |
| 483 | } |
| 484 | |
| 485 | static int __exit omap2430_remove(struct platform_device *pdev) |
| 486 | { |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 487 | struct omap2430_glue *glue = platform_get_drvdata(pdev); |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 488 | |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 489 | platform_device_del(glue->musb); |
| 490 | platform_device_put(glue->musb); |
Hema HK | 207b0e1 | 2011-02-17 12:07:22 +0530 | [diff] [blame] | 491 | pm_runtime_put(&pdev->dev); |
| 492 | pm_runtime_disable(&pdev->dev); |
Felipe Balbi | a3cee12 | 2010-12-02 09:27:29 +0200 | [diff] [blame] | 493 | kfree(glue); |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 498 | #ifdef CONFIG_PM |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 499 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 500 | static int omap2430_runtime_suspend(struct device *dev) |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 501 | { |
| 502 | struct omap2430_glue *glue = dev_get_drvdata(dev); |
| 503 | struct musb *musb = glue_to_musb(glue); |
| 504 | |
| 505 | omap2430_low_level_exit(musb); |
| 506 | otg_set_suspend(musb->xceiv, 1); |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 507 | |
| 508 | return 0; |
| 509 | } |
| 510 | |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 511 | static int omap2430_runtime_resume(struct device *dev) |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 512 | { |
| 513 | struct omap2430_glue *glue = dev_get_drvdata(dev); |
| 514 | struct musb *musb = glue_to_musb(glue); |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 515 | |
| 516 | omap2430_low_level_init(musb); |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 517 | otg_set_suspend(musb->xceiv, 0); |
| 518 | |
| 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | static struct dev_pm_ops omap2430_pm_ops = { |
Hema HK | 7acc619 | 2011-02-28 14:19:34 +0530 | [diff] [blame] | 523 | .runtime_suspend = omap2430_runtime_suspend, |
| 524 | .runtime_resume = omap2430_runtime_resume, |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 525 | }; |
| 526 | |
| 527 | #define DEV_PM_OPS (&omap2430_pm_ops) |
| 528 | #else |
| 529 | #define DEV_PM_OPS NULL |
| 530 | #endif |
| 531 | |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 532 | static struct platform_driver omap2430_driver = { |
| 533 | .remove = __exit_p(omap2430_remove), |
| 534 | .driver = { |
| 535 | .name = "musb-omap2430", |
Felipe Balbi | c20aebb | 2010-12-02 12:44:40 +0200 | [diff] [blame] | 536 | .pm = DEV_PM_OPS, |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 537 | }, |
| 538 | }; |
| 539 | |
| 540 | MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer"); |
| 541 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |
| 542 | MODULE_LICENSE("GPL v2"); |
| 543 | |
| 544 | static int __init omap2430_init(void) |
| 545 | { |
| 546 | return platform_driver_probe(&omap2430_driver, omap2430_probe); |
| 547 | } |
| 548 | subsys_initcall(omap2430_init); |
| 549 | |
| 550 | static void __exit omap2430_exit(void) |
| 551 | { |
| 552 | platform_driver_unregister(&omap2430_driver); |
| 553 | } |
| 554 | module_exit(omap2430_exit); |