Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Texas Instruments DSPS platforms "glue layer" |
| 3 | * |
| 4 | * Copyright (C) 2012, by Texas Instruments |
| 5 | * |
| 6 | * Based on the am35x "glue layer" code. |
| 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 | * musb_dsps.c will be a common file for all the TI DSPS platforms |
| 27 | * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x. |
| 28 | * For now only ti81x is using this and in future davinci.c, am35x.c |
| 29 | * da8xx.c would be merged to this file after testing. |
| 30 | */ |
| 31 | |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/io.h> |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 34 | #include <linux/of.h> |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 35 | #include <linux/err.h> |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 36 | #include <linux/platform_device.h> |
| 37 | #include <linux/dma-mapping.h> |
| 38 | #include <linux/pm_runtime.h> |
| 39 | #include <linux/module.h> |
| 40 | |
| 41 | #include <linux/of.h> |
| 42 | #include <linux/of_device.h> |
| 43 | #include <linux/of_address.h> |
| 44 | |
| 45 | #include <plat/usb.h> |
| 46 | |
| 47 | #include "musb_core.h" |
| 48 | |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 49 | #ifdef CONFIG_OF |
| 50 | static const struct of_device_id musb_dsps_of_match[]; |
| 51 | #endif |
| 52 | |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 53 | /** |
| 54 | * avoid using musb_readx()/musb_writex() as glue layer should not be |
| 55 | * dependent on musb core layer symbols. |
| 56 | */ |
| 57 | static inline u8 dsps_readb(const void __iomem *addr, unsigned offset) |
| 58 | { return __raw_readb(addr + offset); } |
| 59 | |
| 60 | static inline u32 dsps_readl(const void __iomem *addr, unsigned offset) |
| 61 | { return __raw_readl(addr + offset); } |
| 62 | |
| 63 | static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data) |
| 64 | { __raw_writeb(data, addr + offset); } |
| 65 | |
| 66 | static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data) |
| 67 | { __raw_writel(data, addr + offset); } |
| 68 | |
| 69 | /** |
| 70 | * DSPS musb wrapper register offset. |
| 71 | * FIXME: This should be expanded to have all the wrapper registers from TI DSPS |
| 72 | * musb ips. |
| 73 | */ |
| 74 | struct dsps_musb_wrapper { |
| 75 | u16 revision; |
| 76 | u16 control; |
| 77 | u16 status; |
| 78 | u16 eoi; |
| 79 | u16 epintr_set; |
| 80 | u16 epintr_clear; |
| 81 | u16 epintr_status; |
| 82 | u16 coreintr_set; |
| 83 | u16 coreintr_clear; |
| 84 | u16 coreintr_status; |
| 85 | u16 phy_utmi; |
| 86 | u16 mode; |
| 87 | |
| 88 | /* bit positions for control */ |
| 89 | unsigned reset:5; |
| 90 | |
| 91 | /* bit positions for interrupt */ |
| 92 | unsigned usb_shift:5; |
| 93 | u32 usb_mask; |
| 94 | u32 usb_bitmap; |
| 95 | unsigned drvvbus:5; |
| 96 | |
| 97 | unsigned txep_shift:5; |
| 98 | u32 txep_mask; |
| 99 | u32 txep_bitmap; |
| 100 | |
| 101 | unsigned rxep_shift:5; |
| 102 | u32 rxep_mask; |
| 103 | u32 rxep_bitmap; |
| 104 | |
| 105 | /* bit positions for phy_utmi */ |
| 106 | unsigned otg_disable:5; |
| 107 | |
| 108 | /* bit positions for mode */ |
| 109 | unsigned iddig:5; |
| 110 | /* miscellaneous stuff */ |
| 111 | u32 musb_core_offset; |
| 112 | u8 poll_seconds; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 113 | /* number of musb instances */ |
| 114 | u8 instances; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 115 | }; |
| 116 | |
| 117 | /** |
| 118 | * DSPS glue structure. |
| 119 | */ |
| 120 | struct dsps_glue { |
| 121 | struct device *dev; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 122 | struct platform_device *musb[2]; /* child musb pdev */ |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 123 | const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 124 | struct timer_list timer[2]; /* otg_workaround timer */ |
| 125 | unsigned long last_timer[2]; /* last timer data for each instance */ |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 126 | }; |
| 127 | |
| 128 | /** |
| 129 | * dsps_musb_enable - enable interrupts |
| 130 | */ |
| 131 | static void dsps_musb_enable(struct musb *musb) |
| 132 | { |
| 133 | struct device *dev = musb->controller; |
| 134 | struct platform_device *pdev = to_platform_device(dev->parent); |
| 135 | struct dsps_glue *glue = platform_get_drvdata(pdev); |
| 136 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
| 137 | void __iomem *reg_base = musb->ctrl_base; |
| 138 | u32 epmask, coremask; |
| 139 | |
| 140 | /* Workaround: setup IRQs through both register sets. */ |
| 141 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | |
| 142 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); |
| 143 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); |
| 144 | |
| 145 | dsps_writel(reg_base, wrp->epintr_set, epmask); |
| 146 | dsps_writel(reg_base, wrp->coreintr_set, coremask); |
| 147 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ |
Felipe Balbi | 032ec49 | 2011-11-24 15:46:26 +0200 | [diff] [blame] | 148 | dsps_writel(reg_base, wrp->coreintr_set, |
| 149 | (1 << wrp->drvvbus) << wrp->usb_shift); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | /** |
| 153 | * dsps_musb_disable - disable HDRC and flush interrupts |
| 154 | */ |
| 155 | static void dsps_musb_disable(struct musb *musb) |
| 156 | { |
| 157 | struct device *dev = musb->controller; |
| 158 | struct platform_device *pdev = to_platform_device(dev->parent); |
| 159 | struct dsps_glue *glue = platform_get_drvdata(pdev); |
| 160 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
| 161 | void __iomem *reg_base = musb->ctrl_base; |
| 162 | |
| 163 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); |
| 164 | dsps_writel(reg_base, wrp->epintr_clear, |
| 165 | wrp->txep_bitmap | wrp->rxep_bitmap); |
| 166 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); |
| 167 | dsps_writel(reg_base, wrp->eoi, 0); |
| 168 | } |
| 169 | |
| 170 | static void otg_timer(unsigned long _musb) |
| 171 | { |
| 172 | struct musb *musb = (void *)_musb; |
| 173 | void __iomem *mregs = musb->mregs; |
| 174 | struct device *dev = musb->controller; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 175 | struct platform_device *pdev = to_platform_device(dev); |
| 176 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 177 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
| 178 | u8 devctl; |
| 179 | unsigned long flags; |
| 180 | |
| 181 | /* |
| 182 | * We poll because DSPS IP's won't expose several OTG-critical |
| 183 | * status change events (from the transceiver) otherwise. |
| 184 | */ |
| 185 | devctl = dsps_readb(mregs, MUSB_DEVCTL); |
| 186 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, |
| 187 | otg_state_string(musb->xceiv->state)); |
| 188 | |
| 189 | spin_lock_irqsave(&musb->lock, flags); |
| 190 | switch (musb->xceiv->state) { |
| 191 | case OTG_STATE_A_WAIT_BCON: |
| 192 | devctl &= ~MUSB_DEVCTL_SESSION; |
| 193 | dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl); |
| 194 | |
| 195 | devctl = dsps_readb(musb->mregs, MUSB_DEVCTL); |
| 196 | if (devctl & MUSB_DEVCTL_BDEVICE) { |
| 197 | musb->xceiv->state = OTG_STATE_B_IDLE; |
| 198 | MUSB_DEV_MODE(musb); |
| 199 | } else { |
| 200 | musb->xceiv->state = OTG_STATE_A_IDLE; |
| 201 | MUSB_HST_MODE(musb); |
| 202 | } |
| 203 | break; |
| 204 | case OTG_STATE_A_WAIT_VFALL: |
| 205 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; |
| 206 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, |
| 207 | MUSB_INTR_VBUSERROR << wrp->usb_shift); |
| 208 | break; |
| 209 | case OTG_STATE_B_IDLE: |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 210 | devctl = dsps_readb(mregs, MUSB_DEVCTL); |
| 211 | if (devctl & MUSB_DEVCTL_BDEVICE) |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 212 | mod_timer(&glue->timer[pdev->id], |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 213 | jiffies + wrp->poll_seconds * HZ); |
| 214 | else |
| 215 | musb->xceiv->state = OTG_STATE_A_IDLE; |
| 216 | break; |
| 217 | default: |
| 218 | break; |
| 219 | } |
| 220 | spin_unlock_irqrestore(&musb->lock, flags); |
| 221 | } |
| 222 | |
| 223 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) |
| 224 | { |
| 225 | struct device *dev = musb->controller; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 226 | struct platform_device *pdev = to_platform_device(dev); |
| 227 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 228 | |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 229 | if (timeout == 0) |
| 230 | timeout = jiffies + msecs_to_jiffies(3); |
| 231 | |
| 232 | /* Never idle if active, or when VBUS timeout is not set as host */ |
| 233 | if (musb->is_active || (musb->a_wait_bcon == 0 && |
| 234 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { |
| 235 | dev_dbg(musb->controller, "%s active, deleting timer\n", |
| 236 | otg_state_string(musb->xceiv->state)); |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 237 | del_timer(&glue->timer[pdev->id]); |
| 238 | glue->last_timer[pdev->id] = jiffies; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 239 | return; |
| 240 | } |
| 241 | |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 242 | if (time_after(glue->last_timer[pdev->id], timeout) && |
| 243 | timer_pending(&glue->timer[pdev->id])) { |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 244 | dev_dbg(musb->controller, |
| 245 | "Longer idle timer already pending, ignoring...\n"); |
| 246 | return; |
| 247 | } |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 248 | glue->last_timer[pdev->id] = timeout; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 249 | |
| 250 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", |
| 251 | otg_state_string(musb->xceiv->state), |
| 252 | jiffies_to_msecs(timeout - jiffies)); |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 253 | mod_timer(&glue->timer[pdev->id], timeout); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | static irqreturn_t dsps_interrupt(int irq, void *hci) |
| 257 | { |
| 258 | struct musb *musb = hci; |
| 259 | void __iomem *reg_base = musb->ctrl_base; |
| 260 | struct device *dev = musb->controller; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 261 | struct platform_device *pdev = to_platform_device(dev); |
| 262 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 263 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
| 264 | unsigned long flags; |
| 265 | irqreturn_t ret = IRQ_NONE; |
| 266 | u32 epintr, usbintr; |
| 267 | |
| 268 | spin_lock_irqsave(&musb->lock, flags); |
| 269 | |
| 270 | /* Get endpoint interrupts */ |
| 271 | epintr = dsps_readl(reg_base, wrp->epintr_status); |
| 272 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; |
| 273 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; |
| 274 | |
| 275 | if (epintr) |
| 276 | dsps_writel(reg_base, wrp->epintr_status, epintr); |
| 277 | |
| 278 | /* Get usb core interrupts */ |
| 279 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); |
| 280 | if (!usbintr && !epintr) |
| 281 | goto eoi; |
| 282 | |
| 283 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; |
| 284 | if (usbintr) |
| 285 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); |
| 286 | |
| 287 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", |
| 288 | usbintr, epintr); |
| 289 | /* |
| 290 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for |
| 291 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to |
| 292 | * switch appropriately between halves of the OTG state machine. |
| 293 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its |
| 294 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. |
| 295 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... |
| 296 | */ |
Felipe Balbi | 032ec49 | 2011-11-24 15:46:26 +0200 | [diff] [blame] | 297 | if (usbintr & MUSB_INTR_BABBLE) |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 298 | pr_info("CAUTION: musb: Babble Interrupt Occured\n"); |
| 299 | |
| 300 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { |
| 301 | int drvvbus = dsps_readl(reg_base, wrp->status); |
| 302 | void __iomem *mregs = musb->mregs; |
| 303 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); |
| 304 | int err; |
| 305 | |
Felipe Balbi | 032ec49 | 2011-11-24 15:46:26 +0200 | [diff] [blame] | 306 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 307 | if (err) { |
| 308 | /* |
| 309 | * The Mentor core doesn't debounce VBUS as needed |
| 310 | * to cope with device connect current spikes. This |
| 311 | * means it's not uncommon for bus-powered devices |
| 312 | * to get VBUS errors during enumeration. |
| 313 | * |
| 314 | * This is a workaround, but newer RTL from Mentor |
| 315 | * seems to allow a better one: "re"-starting sessions |
| 316 | * without waiting for VBUS to stop registering in |
| 317 | * devctl. |
| 318 | */ |
| 319 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; |
| 320 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 321 | mod_timer(&glue->timer[pdev->id], |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 322 | jiffies + wrp->poll_seconds * HZ); |
| 323 | WARNING("VBUS error workaround (delay coming)\n"); |
Felipe Balbi | 032ec49 | 2011-11-24 15:46:26 +0200 | [diff] [blame] | 324 | } else if (drvvbus) { |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 325 | musb->is_active = 1; |
| 326 | MUSB_HST_MODE(musb); |
| 327 | musb->xceiv->otg->default_a = 1; |
| 328 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 329 | del_timer(&glue->timer[pdev->id]); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 330 | } else { |
| 331 | musb->is_active = 0; |
| 332 | MUSB_DEV_MODE(musb); |
| 333 | musb->xceiv->otg->default_a = 0; |
| 334 | musb->xceiv->state = OTG_STATE_B_IDLE; |
| 335 | } |
| 336 | |
| 337 | /* NOTE: this must complete power-on within 100 ms. */ |
| 338 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", |
| 339 | drvvbus ? "on" : "off", |
| 340 | otg_state_string(musb->xceiv->state), |
| 341 | err ? " ERROR" : "", |
| 342 | devctl); |
| 343 | ret = IRQ_HANDLED; |
| 344 | } |
| 345 | |
| 346 | if (musb->int_tx || musb->int_rx || musb->int_usb) |
| 347 | ret |= musb_interrupt(musb); |
| 348 | |
| 349 | eoi: |
| 350 | /* EOI needs to be written for the IRQ to be re-asserted. */ |
| 351 | if (ret == IRQ_HANDLED || epintr || usbintr) |
| 352 | dsps_writel(reg_base, wrp->eoi, 1); |
| 353 | |
| 354 | /* Poll for ID change */ |
Felipe Balbi | 032ec49 | 2011-11-24 15:46:26 +0200 | [diff] [blame] | 355 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 356 | mod_timer(&glue->timer[pdev->id], |
| 357 | jiffies + wrp->poll_seconds * HZ); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 358 | |
| 359 | spin_unlock_irqrestore(&musb->lock, flags); |
| 360 | |
| 361 | return ret; |
| 362 | } |
| 363 | |
| 364 | static int dsps_musb_init(struct musb *musb) |
| 365 | { |
| 366 | struct device *dev = musb->controller; |
| 367 | struct musb_hdrc_platform_data *plat = dev->platform_data; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 368 | struct platform_device *pdev = to_platform_device(dev); |
| 369 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 370 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
| 371 | struct omap_musb_board_data *data = plat->board_data; |
| 372 | void __iomem *reg_base = musb->ctrl_base; |
| 373 | u32 rev, val; |
| 374 | int status; |
| 375 | |
| 376 | /* mentor core register starts at offset of 0x400 from musb base */ |
| 377 | musb->mregs += wrp->musb_core_offset; |
| 378 | |
| 379 | /* NOP driver needs change if supporting dual instance */ |
| 380 | usb_nop_xceiv_register(); |
Kishon Vijay Abraham I | 662dca5 | 2012-06-22 17:02:46 +0530 | [diff] [blame] | 381 | musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 382 | if (IS_ERR_OR_NULL(musb->xceiv)) |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 383 | return -ENODEV; |
| 384 | |
| 385 | /* Returns zero if e.g. not clocked */ |
| 386 | rev = dsps_readl(reg_base, wrp->revision); |
| 387 | if (!rev) { |
| 388 | status = -ENODEV; |
| 389 | goto err0; |
| 390 | } |
| 391 | |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 392 | setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 393 | |
| 394 | /* Reset the musb */ |
| 395 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); |
| 396 | |
| 397 | /* Start the on-chip PHY and its PLL. */ |
| 398 | if (data->set_phy_power) |
| 399 | data->set_phy_power(1); |
| 400 | |
| 401 | musb->isr = dsps_interrupt; |
| 402 | |
| 403 | /* reset the otgdisable bit, needed for host mode to work */ |
| 404 | val = dsps_readl(reg_base, wrp->phy_utmi); |
| 405 | val &= ~(1 << wrp->otg_disable); |
| 406 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); |
| 407 | |
| 408 | /* clear level interrupt */ |
| 409 | dsps_writel(reg_base, wrp->eoi, 0); |
| 410 | |
| 411 | return 0; |
| 412 | err0: |
Kishon Vijay Abraham I | 721002e | 2012-06-22 17:02:45 +0530 | [diff] [blame] | 413 | usb_put_phy(musb->xceiv); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 414 | usb_nop_xceiv_unregister(); |
| 415 | return status; |
| 416 | } |
| 417 | |
| 418 | static int dsps_musb_exit(struct musb *musb) |
| 419 | { |
| 420 | struct device *dev = musb->controller; |
| 421 | struct musb_hdrc_platform_data *plat = dev->platform_data; |
| 422 | struct omap_musb_board_data *data = plat->board_data; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 423 | struct platform_device *pdev = to_platform_device(dev); |
| 424 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 425 | |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 426 | del_timer_sync(&glue->timer[pdev->id]); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 427 | |
| 428 | /* Shutdown the on-chip PHY and its PLL. */ |
| 429 | if (data->set_phy_power) |
| 430 | data->set_phy_power(0); |
| 431 | |
| 432 | /* NOP driver needs change if supporting dual instance */ |
Kishon Vijay Abraham I | 721002e | 2012-06-22 17:02:45 +0530 | [diff] [blame] | 433 | usb_put_phy(musb->xceiv); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 434 | usb_nop_xceiv_unregister(); |
| 435 | |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | static struct musb_platform_ops dsps_ops = { |
| 440 | .init = dsps_musb_init, |
| 441 | .exit = dsps_musb_exit, |
| 442 | |
| 443 | .enable = dsps_musb_enable, |
| 444 | .disable = dsps_musb_disable, |
| 445 | |
| 446 | .try_idle = dsps_musb_try_idle, |
| 447 | }; |
| 448 | |
| 449 | static u64 musb_dmamask = DMA_BIT_MASK(32); |
| 450 | |
| 451 | static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) |
| 452 | { |
| 453 | struct device *dev = glue->dev; |
| 454 | struct platform_device *pdev = to_platform_device(dev); |
| 455 | struct musb_hdrc_platform_data *pdata = dev->platform_data; |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 456 | struct device_node *np = pdev->dev.of_node; |
| 457 | struct musb_hdrc_config *config; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 458 | struct platform_device *musb; |
| 459 | struct resource *res; |
| 460 | struct resource resources[2]; |
| 461 | char res_name[10]; |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 462 | int ret, musbid; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 463 | |
| 464 | /* get memory resource */ |
| 465 | sprintf(res_name, "musb%d", id); |
| 466 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name); |
| 467 | if (!res) { |
| 468 | dev_err(dev, "%s get mem resource failed\n", res_name); |
| 469 | ret = -ENODEV; |
| 470 | goto err0; |
| 471 | } |
| 472 | res->parent = NULL; |
| 473 | resources[0] = *res; |
| 474 | |
| 475 | /* get irq resource */ |
| 476 | sprintf(res_name, "musb%d-irq", id); |
| 477 | res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res_name); |
| 478 | if (!res) { |
| 479 | dev_err(dev, "%s get irq resource failed\n", res_name); |
| 480 | ret = -ENODEV; |
| 481 | goto err0; |
| 482 | } |
| 483 | strcpy((u8 *)res->name, "mc"); |
| 484 | res->parent = NULL; |
| 485 | resources[1] = *res; |
| 486 | |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 487 | /* get the musb id */ |
| 488 | musbid = musb_get_id(dev, GFP_KERNEL); |
| 489 | if (musbid < 0) { |
| 490 | dev_err(dev, "failed to allocate musb id\n"); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 491 | ret = -ENOMEM; |
| 492 | goto err0; |
| 493 | } |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 494 | /* allocate the child platform device */ |
| 495 | musb = platform_device_alloc("musb-hdrc", musbid); |
| 496 | if (!musb) { |
| 497 | dev_err(dev, "failed to allocate musb device\n"); |
| 498 | ret = -ENOMEM; |
| 499 | goto err1; |
| 500 | } |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 501 | |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 502 | musb->id = musbid; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 503 | musb->dev.parent = dev; |
| 504 | musb->dev.dma_mask = &musb_dmamask; |
| 505 | musb->dev.coherent_dma_mask = musb_dmamask; |
| 506 | |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 507 | glue->musb[id] = musb; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 508 | |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 509 | ret = platform_device_add_resources(musb, resources, 2); |
| 510 | if (ret) { |
| 511 | dev_err(dev, "failed to add resources\n"); |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 512 | goto err2; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 513 | } |
| 514 | |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 515 | if (np) { |
| 516 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
| 517 | if (!pdata) { |
| 518 | dev_err(&pdev->dev, |
| 519 | "failed to allocate musb platfrom data\n"); |
| 520 | ret = -ENOMEM; |
| 521 | goto err2; |
| 522 | } |
| 523 | |
| 524 | config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); |
| 525 | if (!config) { |
| 526 | dev_err(&pdev->dev, |
| 527 | "failed to allocate musb hdrc config\n"); |
| 528 | goto err2; |
| 529 | } |
| 530 | |
| 531 | of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); |
| 532 | of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); |
| 533 | sprintf(res_name, "port%d-mode", id); |
| 534 | of_property_read_u32(np, res_name, (u32 *)&pdata->mode); |
| 535 | of_property_read_u32(np, "power", (u32 *)&pdata->power); |
| 536 | config->multipoint = of_property_read_bool(np, "multipoint"); |
| 537 | |
| 538 | pdata->config = config; |
| 539 | } |
| 540 | |
| 541 | pdata->platform_ops = &dsps_ops; |
| 542 | |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 543 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); |
| 544 | if (ret) { |
| 545 | dev_err(dev, "failed to add platform_data\n"); |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 546 | goto err2; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | ret = platform_device_add(musb); |
| 550 | if (ret) { |
| 551 | dev_err(dev, "failed to register musb device\n"); |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 552 | goto err2; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | return 0; |
| 556 | |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 557 | err2: |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 558 | platform_device_put(musb); |
B, Ravi | 65b3d52 | 2012-08-31 11:09:49 +0000 | [diff] [blame] | 559 | err1: |
| 560 | musb_put_id(dev, musbid); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 561 | err0: |
| 562 | return ret; |
| 563 | } |
| 564 | |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 565 | static void dsps_delete_musb_pdev(struct dsps_glue *glue, u8 id) |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 566 | { |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 567 | musb_put_id(glue->dev, glue->musb[id]->id); |
| 568 | platform_device_del(glue->musb[id]); |
| 569 | platform_device_put(glue->musb[id]); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | static int __devinit dsps_probe(struct platform_device *pdev) |
| 573 | { |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 574 | struct device_node *np = pdev->dev.of_node; |
| 575 | const struct of_device_id *match; |
| 576 | const struct dsps_musb_wrapper *wrp; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 577 | struct dsps_glue *glue; |
| 578 | struct resource *iomem; |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 579 | int ret, i; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 580 | |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 581 | match = of_match_node(musb_dsps_of_match, np); |
| 582 | if (!match) { |
| 583 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); |
| 584 | ret = -EINVAL; |
| 585 | goto err0; |
| 586 | } |
| 587 | wrp = match->data; |
| 588 | |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 589 | /* allocate glue */ |
| 590 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); |
| 591 | if (!glue) { |
| 592 | dev_err(&pdev->dev, "unable to allocate glue memory\n"); |
| 593 | ret = -ENOMEM; |
| 594 | goto err0; |
| 595 | } |
| 596 | |
| 597 | /* get memory resource */ |
| 598 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 599 | if (!iomem) { |
| 600 | dev_err(&pdev->dev, "failed to get usbss mem resourse\n"); |
| 601 | ret = -ENODEV; |
| 602 | goto err1; |
| 603 | } |
| 604 | |
| 605 | glue->dev = &pdev->dev; |
| 606 | |
| 607 | glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL); |
| 608 | if (!glue->wrp) { |
| 609 | dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n"); |
| 610 | ret = -ENOMEM; |
| 611 | goto err1; |
| 612 | } |
| 613 | platform_set_drvdata(pdev, glue); |
| 614 | |
| 615 | /* create the child platform device for first instances of musb */ |
| 616 | ret = dsps_create_musb_pdev(glue, 0); |
| 617 | if (ret != 0) { |
| 618 | dev_err(&pdev->dev, "failed to create child pdev\n"); |
| 619 | goto err2; |
| 620 | } |
| 621 | |
| 622 | /* enable the usbss clocks */ |
| 623 | pm_runtime_enable(&pdev->dev); |
| 624 | |
| 625 | ret = pm_runtime_get_sync(&pdev->dev); |
| 626 | if (ret < 0) { |
| 627 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 628 | /* create the child platform device for all instances of musb */ |
| 629 | for (i = 0; i < wrp->instances ; i++) { |
| 630 | ret = dsps_create_musb_pdev(glue, i); |
| 631 | if (ret != 0) { |
| 632 | dev_err(&pdev->dev, "failed to create child pdev\n"); |
| 633 | /* release resources of previously created instances */ |
| 634 | for (i--; i >= 0 ; i--) |
| 635 | dsps_delete_musb_pdev(glue, i); |
| 636 | goto err3; |
| 637 | } |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | return 0; |
| 641 | |
| 642 | err3: |
| 643 | pm_runtime_disable(&pdev->dev); |
| 644 | err2: |
| 645 | kfree(glue->wrp); |
| 646 | err1: |
| 647 | kfree(glue); |
| 648 | err0: |
| 649 | return ret; |
| 650 | } |
| 651 | static int __devexit dsps_remove(struct platform_device *pdev) |
| 652 | { |
| 653 | struct dsps_glue *glue = platform_get_drvdata(pdev); |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 654 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
| 655 | int i; |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 656 | |
| 657 | /* delete the child platform device */ |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 658 | for (i = 0; i < wrp->instances ; i++) |
| 659 | dsps_delete_musb_pdev(glue, i); |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 660 | |
| 661 | /* disable usbss clocks */ |
| 662 | pm_runtime_put(&pdev->dev); |
| 663 | pm_runtime_disable(&pdev->dev); |
| 664 | kfree(glue->wrp); |
| 665 | kfree(glue); |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | #ifdef CONFIG_PM_SLEEP |
| 670 | static int dsps_suspend(struct device *dev) |
| 671 | { |
| 672 | struct musb_hdrc_platform_data *plat = dev->platform_data; |
| 673 | struct omap_musb_board_data *data = plat->board_data; |
| 674 | |
| 675 | /* Shutdown the on-chip PHY and its PLL. */ |
| 676 | if (data->set_phy_power) |
| 677 | data->set_phy_power(0); |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | static int dsps_resume(struct device *dev) |
| 683 | { |
| 684 | struct musb_hdrc_platform_data *plat = dev->platform_data; |
| 685 | struct omap_musb_board_data *data = plat->board_data; |
| 686 | |
| 687 | /* Start the on-chip PHY and its PLL. */ |
| 688 | if (data->set_phy_power) |
| 689 | data->set_phy_power(1); |
| 690 | |
| 691 | return 0; |
| 692 | } |
| 693 | #endif |
| 694 | |
| 695 | static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume); |
| 696 | |
| 697 | static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = { |
| 698 | .revision = 0x00, |
| 699 | .control = 0x14, |
| 700 | .status = 0x18, |
| 701 | .eoi = 0x24, |
| 702 | .epintr_set = 0x38, |
| 703 | .epintr_clear = 0x40, |
| 704 | .epintr_status = 0x30, |
| 705 | .coreintr_set = 0x3c, |
| 706 | .coreintr_clear = 0x44, |
| 707 | .coreintr_status = 0x34, |
| 708 | .phy_utmi = 0xe0, |
| 709 | .mode = 0xe8, |
| 710 | .reset = 0, |
| 711 | .otg_disable = 21, |
| 712 | .iddig = 8, |
| 713 | .usb_shift = 0, |
| 714 | .usb_mask = 0x1ff, |
| 715 | .usb_bitmap = (0x1ff << 0), |
| 716 | .drvvbus = 8, |
| 717 | .txep_shift = 0, |
| 718 | .txep_mask = 0xffff, |
| 719 | .txep_bitmap = (0xffff << 0), |
| 720 | .rxep_shift = 16, |
| 721 | .rxep_mask = 0xfffe, |
| 722 | .rxep_bitmap = (0xfffe << 16), |
| 723 | .musb_core_offset = 0x400, |
| 724 | .poll_seconds = 2, |
B, Ravi | db4a932 | 2012-08-31 11:09:51 +0000 | [diff] [blame] | 725 | .instances = 2, |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 726 | }; |
| 727 | |
| 728 | static const struct platform_device_id musb_dsps_id_table[] __devinitconst = { |
| 729 | { |
| 730 | .name = "musb-ti81xx", |
| 731 | .driver_data = (kernel_ulong_t) &ti81xx_driver_data, |
| 732 | }, |
| 733 | { }, /* Terminating Entry */ |
| 734 | }; |
| 735 | MODULE_DEVICE_TABLE(platform, musb_dsps_id_table); |
| 736 | |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 737 | #ifdef CONFIG_OF |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 738 | static const struct of_device_id musb_dsps_of_match[] __devinitconst = { |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 739 | { .compatible = "ti,musb-am33xx", |
| 740 | .data = (void *) &ti81xx_driver_data, }, |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 741 | { }, |
| 742 | }; |
| 743 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 744 | #endif |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 745 | |
| 746 | static struct platform_driver dsps_usbss_driver = { |
| 747 | .probe = dsps_probe, |
| 748 | .remove = __devexit_p(dsps_remove), |
| 749 | .driver = { |
| 750 | .name = "musb-dsps", |
| 751 | .pm = &dsps_pm_ops, |
Ajay Kumar Gupta | 6514567 | 2012-08-31 11:09:53 +0000 | [diff] [blame^] | 752 | .of_match_table = of_match_ptr(musb_dsps_of_match), |
Ajay Kumar Gupta | 9ecb887 | 2012-03-12 19:30:22 +0530 | [diff] [blame] | 753 | }, |
| 754 | .id_table = musb_dsps_id_table, |
| 755 | }; |
| 756 | |
| 757 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); |
| 758 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); |
| 759 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); |
| 760 | MODULE_LICENSE("GPL v2"); |
| 761 | |
| 762 | static int __init dsps_init(void) |
| 763 | { |
| 764 | return platform_driver_register(&dsps_usbss_driver); |
| 765 | } |
| 766 | subsys_initcall(dsps_init); |
| 767 | |
| 768 | static void __exit dsps_exit(void) |
| 769 | { |
| 770 | platform_driver_unregister(&dsps_usbss_driver); |
| 771 | } |
| 772 | module_exit(dsps_exit); |