Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller |
| 3 | * |
| 4 | * Copyright (C) 2004 Texas Instruments |
| 5 | * Copyright (C) 2004 David Brownell |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/kernel.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/interrupt.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 27 | #include <linux/platform_device.h> |
David Brownell | 5f84813 | 2006-12-16 15:34:53 -0800 | [diff] [blame] | 28 | #include <linux/usb/ch9.h> |
David Brownell | 187426e | 2007-12-12 13:45:25 +0100 | [diff] [blame^] | 29 | #include <linux/usb/gadget.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/usb.h> |
David Brownell | 3a16f7b | 2006-06-29 12:27:23 -0700 | [diff] [blame] | 31 | #include <linux/usb/otg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/i2c.h> |
| 33 | #include <linux/workqueue.h> |
| 34 | |
| 35 | #include <asm/irq.h> |
| 36 | #include <asm/arch/usb.h> |
| 37 | |
| 38 | |
| 39 | #ifndef DEBUG |
| 40 | #undef VERBOSE |
| 41 | #endif |
| 42 | |
| 43 | |
| 44 | #define DRIVER_VERSION "24 August 2004" |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 45 | #define DRIVER_NAME (isp1301_driver.driver.name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); |
| 48 | MODULE_LICENSE("GPL"); |
| 49 | |
| 50 | struct isp1301 { |
| 51 | struct otg_transceiver otg; |
| 52 | struct i2c_client client; |
| 53 | void (*i2c_release)(struct device *dev); |
| 54 | |
| 55 | int irq; |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 56 | int irq_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 58 | u32 last_otg_ctrl; |
| 59 | unsigned working:1; |
| 60 | |
| 61 | struct timer_list timer; |
| 62 | |
| 63 | /* use keventd context to change the state for us */ |
| 64 | struct work_struct work; |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | unsigned long todo; |
| 67 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ |
| 68 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ |
| 69 | # define WORK_HOST_RESUME 4 /* resume host */ |
| 70 | # define WORK_TIMER 6 /* timer fired */ |
| 71 | # define WORK_STOP 7 /* don't resubmit */ |
| 72 | }; |
| 73 | |
| 74 | |
| 75 | /* bits in OTG_CTRL_REG */ |
| 76 | |
| 77 | #define OTG_XCEIV_OUTPUTS \ |
| 78 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) |
| 79 | #define OTG_XCEIV_INPUTS \ |
| 80 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) |
| 81 | #define OTG_CTRL_BITS \ |
| 82 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) |
| 83 | /* and OTG_PULLUP is sometimes written */ |
| 84 | |
| 85 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ |
| 86 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ |
| 87 | OTG_CTRL_BITS) |
| 88 | |
| 89 | |
| 90 | /*-------------------------------------------------------------------------*/ |
| 91 | |
| 92 | #ifdef CONFIG_MACH_OMAP_H2 |
| 93 | |
| 94 | /* board-specific PM hooks */ |
| 95 | |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 96 | #include <asm/gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | #include <asm/arch/mux.h> |
| 98 | #include <asm/mach-types.h> |
| 99 | |
| 100 | |
| 101 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) |
| 102 | |
| 103 | #include <asm/arch/tps65010.h> |
| 104 | |
| 105 | #else |
| 106 | |
| 107 | static inline int tps65010_set_vbus_draw(unsigned mA) |
| 108 | { |
| 109 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | #endif |
| 114 | |
| 115 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) |
| 116 | { |
| 117 | int status = tps65010_set_vbus_draw(mA); |
| 118 | if (status < 0) |
| 119 | pr_debug(" VBUS %d mA error %d\n", mA, status); |
| 120 | } |
| 121 | |
| 122 | static void enable_vbus_source(struct isp1301 *isp) |
| 123 | { |
| 124 | /* this board won't supply more than 8mA vbus power. |
| 125 | * some boards can switch a 100ma "unit load" (or more). |
| 126 | */ |
| 127 | } |
| 128 | |
| 129 | |
| 130 | /* products will deliver OTG messages with LEDs, GUI, etc */ |
| 131 | static inline void notresponding(struct isp1301 *isp) |
| 132 | { |
| 133 | printk(KERN_NOTICE "OTG device not responding.\n"); |
| 134 | } |
| 135 | |
| 136 | |
| 137 | #endif |
| 138 | |
| 139 | /*-------------------------------------------------------------------------*/ |
| 140 | |
| 141 | /* only two addresses possible */ |
| 142 | #define ISP_BASE 0x2c |
| 143 | static unsigned short normal_i2c[] = { |
| 144 | ISP_BASE, ISP_BASE + 1, |
| 145 | I2C_CLIENT_END }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | I2C_CLIENT_INSMOD; |
| 148 | |
| 149 | static struct i2c_driver isp1301_driver; |
| 150 | |
| 151 | /* smbus apis are used for portability */ |
| 152 | |
| 153 | static inline u8 |
| 154 | isp1301_get_u8(struct isp1301 *isp, u8 reg) |
| 155 | { |
| 156 | return i2c_smbus_read_byte_data(&isp->client, reg + 0); |
| 157 | } |
| 158 | |
| 159 | static inline int |
| 160 | isp1301_get_u16(struct isp1301 *isp, u8 reg) |
| 161 | { |
| 162 | return i2c_smbus_read_word_data(&isp->client, reg); |
| 163 | } |
| 164 | |
| 165 | static inline int |
| 166 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) |
| 167 | { |
| 168 | return i2c_smbus_write_byte_data(&isp->client, reg + 0, bits); |
| 169 | } |
| 170 | |
| 171 | static inline int |
| 172 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) |
| 173 | { |
| 174 | return i2c_smbus_write_byte_data(&isp->client, reg + 1, bits); |
| 175 | } |
| 176 | |
| 177 | /*-------------------------------------------------------------------------*/ |
| 178 | |
| 179 | /* identification */ |
| 180 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ |
| 181 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ |
| 182 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ |
| 183 | |
| 184 | #define I2C_VENDOR_ID_PHILIPS 0x04cc |
| 185 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 |
| 186 | |
| 187 | /* operational registers */ |
| 188 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ |
| 189 | # define MC1_SPEED_REG (1 << 0) |
| 190 | # define MC1_SUSPEND_REG (1 << 1) |
| 191 | # define MC1_DAT_SE0 (1 << 2) |
| 192 | # define MC1_TRANSPARENT (1 << 3) |
| 193 | # define MC1_BDIS_ACON_EN (1 << 4) |
| 194 | # define MC1_OE_INT_EN (1 << 5) |
| 195 | # define MC1_UART_EN (1 << 6) |
| 196 | # define MC1_MASK 0x7f |
| 197 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ |
| 198 | # define MC2_GLOBAL_PWR_DN (1 << 0) |
| 199 | # define MC2_SPD_SUSP_CTRL (1 << 1) |
| 200 | # define MC2_BI_DI (1 << 2) |
| 201 | # define MC2_TRANSP_BDIR0 (1 << 3) |
| 202 | # define MC2_TRANSP_BDIR1 (1 << 4) |
| 203 | # define MC2_AUDIO_EN (1 << 5) |
| 204 | # define MC2_PSW_EN (1 << 6) |
| 205 | # define MC2_EN2V7 (1 << 7) |
| 206 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ |
| 207 | # define OTG1_DP_PULLUP (1 << 0) |
| 208 | # define OTG1_DM_PULLUP (1 << 1) |
| 209 | # define OTG1_DP_PULLDOWN (1 << 2) |
| 210 | # define OTG1_DM_PULLDOWN (1 << 3) |
| 211 | # define OTG1_ID_PULLDOWN (1 << 4) |
| 212 | # define OTG1_VBUS_DRV (1 << 5) |
| 213 | # define OTG1_VBUS_DISCHRG (1 << 6) |
| 214 | # define OTG1_VBUS_CHRG (1 << 7) |
| 215 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ |
| 216 | # define OTG_B_SESS_END (1 << 6) |
| 217 | # define OTG_B_SESS_VLD (1 << 7) |
| 218 | |
| 219 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ |
| 220 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ |
| 221 | |
| 222 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ |
| 223 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ |
| 224 | |
| 225 | /* same bitfields in all interrupt registers */ |
| 226 | # define INTR_VBUS_VLD (1 << 0) |
| 227 | # define INTR_SESS_VLD (1 << 1) |
| 228 | # define INTR_DP_HI (1 << 2) |
| 229 | # define INTR_ID_GND (1 << 3) |
| 230 | # define INTR_DM_HI (1 << 4) |
| 231 | # define INTR_ID_FLOAT (1 << 5) |
| 232 | # define INTR_BDIS_ACON (1 << 6) |
| 233 | # define INTR_CR_INT (1 << 7) |
| 234 | |
| 235 | /*-------------------------------------------------------------------------*/ |
| 236 | |
| 237 | static const char *state_string(enum usb_otg_state state) |
| 238 | { |
| 239 | switch (state) { |
| 240 | case OTG_STATE_A_IDLE: return "a_idle"; |
| 241 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; |
| 242 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; |
| 243 | case OTG_STATE_A_HOST: return "a_host"; |
| 244 | case OTG_STATE_A_SUSPEND: return "a_suspend"; |
| 245 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; |
| 246 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; |
| 247 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; |
| 248 | case OTG_STATE_B_IDLE: return "b_idle"; |
| 249 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; |
| 250 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; |
| 251 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; |
| 252 | case OTG_STATE_B_HOST: return "b_host"; |
| 253 | default: return "UNDEFINED"; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | static inline const char *state_name(struct isp1301 *isp) |
| 258 | { |
| 259 | return state_string(isp->otg.state); |
| 260 | } |
| 261 | |
| 262 | #ifdef VERBOSE |
| 263 | #define dev_vdbg dev_dbg |
| 264 | #else |
| 265 | #define dev_vdbg(dev, fmt, arg...) do{}while(0) |
| 266 | #endif |
| 267 | |
| 268 | /*-------------------------------------------------------------------------*/ |
| 269 | |
| 270 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; |
| 271 | * not everything is guarded by board-specific checks, or even using |
| 272 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. |
| 273 | * |
| 274 | * ALSO: this currently doesn't use ISP1301 low-power modes |
| 275 | * while OTG is running. |
| 276 | */ |
| 277 | |
| 278 | static void power_down(struct isp1301 *isp) |
| 279 | { |
| 280 | isp->otg.state = OTG_STATE_UNDEFINED; |
| 281 | |
| 282 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); |
| 283 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); |
| 284 | |
| 285 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); |
| 286 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
| 287 | } |
| 288 | |
| 289 | static void power_up(struct isp1301 *isp) |
| 290 | { |
| 291 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); |
| 292 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | /* do this only when cpu is driving transceiver, |
| 295 | * so host won't see a low speed device... |
| 296 | */ |
| 297 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
| 298 | } |
| 299 | |
| 300 | #define NO_HOST_SUSPEND |
| 301 | |
| 302 | static int host_suspend(struct isp1301 *isp) |
| 303 | { |
| 304 | #ifdef NO_HOST_SUSPEND |
| 305 | return 0; |
| 306 | #else |
| 307 | struct device *dev; |
| 308 | |
| 309 | if (!isp->otg.host) |
| 310 | return -ENODEV; |
| 311 | |
| 312 | /* Currently ASSUMES only the OTG port matters; |
| 313 | * other ports could be active... |
| 314 | */ |
| 315 | dev = isp->otg.host->controller; |
| 316 | return dev->driver->suspend(dev, 3, 0); |
| 317 | #endif |
| 318 | } |
| 319 | |
| 320 | static int host_resume(struct isp1301 *isp) |
| 321 | { |
| 322 | #ifdef NO_HOST_SUSPEND |
| 323 | return 0; |
| 324 | #else |
| 325 | struct device *dev; |
| 326 | |
| 327 | if (!isp->otg.host) |
| 328 | return -ENODEV; |
| 329 | |
| 330 | dev = isp->otg.host->controller; |
| 331 | return dev->driver->resume(dev, 0); |
| 332 | #endif |
| 333 | } |
| 334 | |
| 335 | static int gadget_suspend(struct isp1301 *isp) |
| 336 | { |
| 337 | isp->otg.gadget->b_hnp_enable = 0; |
| 338 | isp->otg.gadget->a_hnp_support = 0; |
| 339 | isp->otg.gadget->a_alt_hnp_support = 0; |
| 340 | return usb_gadget_vbus_disconnect(isp->otg.gadget); |
| 341 | } |
| 342 | |
| 343 | /*-------------------------------------------------------------------------*/ |
| 344 | |
| 345 | #define TIMER_MINUTES 10 |
| 346 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) |
| 347 | |
| 348 | /* Almost all our I2C messaging comes from a work queue's task context. |
| 349 | * NOTE: guaranteeing certain response times might mean we shouldn't |
| 350 | * share keventd's work queue; a realtime task might be safest. |
| 351 | */ |
| 352 | void |
| 353 | isp1301_defer_work(struct isp1301 *isp, int work) |
| 354 | { |
| 355 | int status; |
| 356 | |
| 357 | if (isp && !test_and_set_bit(work, &isp->todo)) { |
| 358 | (void) get_device(&isp->client.dev); |
| 359 | status = schedule_work(&isp->work); |
| 360 | if (!status && !isp->working) |
| 361 | dev_vdbg(&isp->client.dev, |
| 362 | "work item %d may be lost\n", work); |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | /* called from irq handlers */ |
| 367 | static void a_idle(struct isp1301 *isp, const char *tag) |
| 368 | { |
| 369 | if (isp->otg.state == OTG_STATE_A_IDLE) |
| 370 | return; |
| 371 | |
| 372 | isp->otg.default_a = 1; |
| 373 | if (isp->otg.host) { |
| 374 | isp->otg.host->is_b_host = 0; |
| 375 | host_suspend(isp); |
| 376 | } |
| 377 | if (isp->otg.gadget) { |
| 378 | isp->otg.gadget->is_a_peripheral = 1; |
| 379 | gadget_suspend(isp); |
| 380 | } |
| 381 | isp->otg.state = OTG_STATE_A_IDLE; |
| 382 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; |
| 383 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
| 384 | } |
| 385 | |
| 386 | /* called from irq handlers */ |
| 387 | static void b_idle(struct isp1301 *isp, const char *tag) |
| 388 | { |
| 389 | if (isp->otg.state == OTG_STATE_B_IDLE) |
| 390 | return; |
| 391 | |
| 392 | isp->otg.default_a = 0; |
| 393 | if (isp->otg.host) { |
| 394 | isp->otg.host->is_b_host = 1; |
| 395 | host_suspend(isp); |
| 396 | } |
| 397 | if (isp->otg.gadget) { |
| 398 | isp->otg.gadget->is_a_peripheral = 0; |
| 399 | gadget_suspend(isp); |
| 400 | } |
| 401 | isp->otg.state = OTG_STATE_B_IDLE; |
| 402 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; |
| 403 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
| 404 | } |
| 405 | |
| 406 | static void |
| 407 | dump_regs(struct isp1301 *isp, const char *label) |
| 408 | { |
| 409 | #ifdef DEBUG |
| 410 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); |
| 411 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); |
| 412 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); |
| 413 | |
| 414 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", |
| 415 | OTG_CTRL_REG, label, state_name(isp), |
| 416 | ctrl, status, src); |
| 417 | /* mode control and irq enables don't change much */ |
| 418 | #endif |
| 419 | } |
| 420 | |
| 421 | /*-------------------------------------------------------------------------*/ |
| 422 | |
| 423 | #ifdef CONFIG_USB_OTG |
| 424 | |
| 425 | /* |
| 426 | * The OMAP OTG controller handles most of the OTG state transitions. |
| 427 | * |
| 428 | * We translate isp1301 outputs (mostly voltage comparator status) into |
| 429 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state |
| 430 | * flags into isp1301 inputs ... and infer state transitions. |
| 431 | */ |
| 432 | |
| 433 | #ifdef VERBOSE |
| 434 | |
| 435 | static void check_state(struct isp1301 *isp, const char *tag) |
| 436 | { |
| 437 | enum usb_otg_state state = OTG_STATE_UNDEFINED; |
| 438 | u8 fsm = OTG_TEST_REG & 0x0ff; |
| 439 | unsigned extra = 0; |
| 440 | |
| 441 | switch (fsm) { |
| 442 | |
| 443 | /* default-b */ |
| 444 | case 0x0: |
| 445 | state = OTG_STATE_B_IDLE; |
| 446 | break; |
| 447 | case 0x3: |
| 448 | case 0x7: |
| 449 | extra = 1; |
| 450 | case 0x1: |
| 451 | state = OTG_STATE_B_PERIPHERAL; |
| 452 | break; |
| 453 | case 0x11: |
| 454 | state = OTG_STATE_B_SRP_INIT; |
| 455 | break; |
| 456 | |
| 457 | /* extra dual-role default-b states */ |
| 458 | case 0x12: |
| 459 | case 0x13: |
| 460 | case 0x16: |
| 461 | extra = 1; |
| 462 | case 0x17: |
| 463 | state = OTG_STATE_B_WAIT_ACON; |
| 464 | break; |
| 465 | case 0x34: |
| 466 | state = OTG_STATE_B_HOST; |
| 467 | break; |
| 468 | |
| 469 | /* default-a */ |
| 470 | case 0x36: |
| 471 | state = OTG_STATE_A_IDLE; |
| 472 | break; |
| 473 | case 0x3c: |
| 474 | state = OTG_STATE_A_WAIT_VFALL; |
| 475 | break; |
| 476 | case 0x7d: |
| 477 | state = OTG_STATE_A_VBUS_ERR; |
| 478 | break; |
| 479 | case 0x9e: |
| 480 | case 0x9f: |
| 481 | extra = 1; |
| 482 | case 0x89: |
| 483 | state = OTG_STATE_A_PERIPHERAL; |
| 484 | break; |
| 485 | case 0xb7: |
| 486 | state = OTG_STATE_A_WAIT_VRISE; |
| 487 | break; |
| 488 | case 0xb8: |
| 489 | state = OTG_STATE_A_WAIT_BCON; |
| 490 | break; |
| 491 | case 0xb9: |
| 492 | state = OTG_STATE_A_HOST; |
| 493 | break; |
| 494 | case 0xba: |
| 495 | state = OTG_STATE_A_SUSPEND; |
| 496 | break; |
| 497 | default: |
| 498 | break; |
| 499 | } |
| 500 | if (isp->otg.state == state && !extra) |
| 501 | return; |
| 502 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, |
| 503 | state_string(state), fsm, state_name(isp), OTG_CTRL_REG); |
| 504 | } |
| 505 | |
| 506 | #else |
| 507 | |
| 508 | static inline void check_state(struct isp1301 *isp, const char *tag) { } |
| 509 | |
| 510 | #endif |
| 511 | |
| 512 | /* outputs from ISP1301_INTERRUPT_SOURCE */ |
| 513 | static void update_otg1(struct isp1301 *isp, u8 int_src) |
| 514 | { |
| 515 | u32 otg_ctrl; |
| 516 | |
| 517 | otg_ctrl = OTG_CTRL_REG |
| 518 | & OTG_CTRL_MASK |
| 519 | & ~OTG_XCEIV_INPUTS |
| 520 | & ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); |
| 521 | if (int_src & INTR_SESS_VLD) |
| 522 | otg_ctrl |= OTG_ASESSVLD; |
| 523 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { |
| 524 | a_idle(isp, "vfall"); |
| 525 | otg_ctrl &= ~OTG_CTRL_BITS; |
| 526 | } |
| 527 | if (int_src & INTR_VBUS_VLD) |
| 528 | otg_ctrl |= OTG_VBUSVLD; |
| 529 | if (int_src & INTR_ID_GND) { /* default-A */ |
| 530 | if (isp->otg.state == OTG_STATE_B_IDLE |
| 531 | || isp->otg.state == OTG_STATE_UNDEFINED) { |
| 532 | a_idle(isp, "init"); |
| 533 | return; |
| 534 | } |
| 535 | } else { /* default-B */ |
| 536 | otg_ctrl |= OTG_ID; |
| 537 | if (isp->otg.state == OTG_STATE_A_IDLE |
| 538 | || isp->otg.state == OTG_STATE_UNDEFINED) { |
| 539 | b_idle(isp, "init"); |
| 540 | return; |
| 541 | } |
| 542 | } |
| 543 | OTG_CTRL_REG = otg_ctrl; |
| 544 | } |
| 545 | |
| 546 | /* outputs from ISP1301_OTG_STATUS */ |
| 547 | static void update_otg2(struct isp1301 *isp, u8 otg_status) |
| 548 | { |
| 549 | u32 otg_ctrl; |
| 550 | |
| 551 | otg_ctrl = OTG_CTRL_REG |
| 552 | & OTG_CTRL_MASK |
| 553 | & ~OTG_XCEIV_INPUTS |
| 554 | & ~(OTG_BSESSVLD|OTG_BSESSEND); |
| 555 | if (otg_status & OTG_B_SESS_VLD) |
| 556 | otg_ctrl |= OTG_BSESSVLD; |
| 557 | else if (otg_status & OTG_B_SESS_END) |
| 558 | otg_ctrl |= OTG_BSESSEND; |
| 559 | OTG_CTRL_REG = otg_ctrl; |
| 560 | } |
| 561 | |
| 562 | /* inputs going to ISP1301 */ |
| 563 | static void otg_update_isp(struct isp1301 *isp) |
| 564 | { |
| 565 | u32 otg_ctrl, otg_change; |
| 566 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; |
| 567 | |
| 568 | otg_ctrl = OTG_CTRL_REG; |
| 569 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; |
| 570 | isp->last_otg_ctrl = otg_ctrl; |
| 571 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; |
| 572 | |
| 573 | switch (isp->otg.state) { |
| 574 | case OTG_STATE_B_IDLE: |
| 575 | case OTG_STATE_B_PERIPHERAL: |
| 576 | case OTG_STATE_B_SRP_INIT: |
| 577 | if (!(otg_ctrl & OTG_PULLUP)) { |
| 578 | // if (otg_ctrl & OTG_B_HNPEN) { |
| 579 | if (isp->otg.gadget->b_hnp_enable) { |
| 580 | isp->otg.state = OTG_STATE_B_WAIT_ACON; |
| 581 | pr_debug(" --> b_wait_acon\n"); |
| 582 | } |
| 583 | goto pulldown; |
| 584 | } |
| 585 | pullup: |
| 586 | set |= OTG1_DP_PULLUP; |
| 587 | clr |= OTG1_DP_PULLDOWN; |
| 588 | break; |
| 589 | case OTG_STATE_A_SUSPEND: |
| 590 | case OTG_STATE_A_PERIPHERAL: |
| 591 | if (otg_ctrl & OTG_PULLUP) |
| 592 | goto pullup; |
| 593 | /* FALLTHROUGH */ |
| 594 | // case OTG_STATE_B_WAIT_ACON: |
| 595 | default: |
| 596 | pulldown: |
| 597 | set |= OTG1_DP_PULLDOWN; |
| 598 | clr |= OTG1_DP_PULLUP; |
| 599 | break; |
| 600 | } |
| 601 | |
| 602 | # define toggle(OTG,ISP) do { \ |
| 603 | if (otg_ctrl & OTG) set |= ISP; \ |
| 604 | else clr |= ISP; \ |
| 605 | } while (0) |
| 606 | |
| 607 | if (!(isp->otg.host)) |
| 608 | otg_ctrl &= ~OTG_DRV_VBUS; |
| 609 | |
| 610 | switch (isp->otg.state) { |
| 611 | case OTG_STATE_A_SUSPEND: |
| 612 | if (otg_ctrl & OTG_DRV_VBUS) { |
| 613 | set |= OTG1_VBUS_DRV; |
| 614 | break; |
| 615 | } |
| 616 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ |
| 617 | notresponding(isp); |
| 618 | |
| 619 | /* FALLTHROUGH */ |
| 620 | case OTG_STATE_A_VBUS_ERR: |
| 621 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; |
| 622 | pr_debug(" --> a_wait_vfall\n"); |
| 623 | /* FALLTHROUGH */ |
| 624 | case OTG_STATE_A_WAIT_VFALL: |
| 625 | /* FIXME usbcore thinks port power is still on ... */ |
| 626 | clr |= OTG1_VBUS_DRV; |
| 627 | break; |
| 628 | case OTG_STATE_A_IDLE: |
| 629 | if (otg_ctrl & OTG_DRV_VBUS) { |
| 630 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; |
| 631 | pr_debug(" --> a_wait_vrise\n"); |
| 632 | } |
| 633 | /* FALLTHROUGH */ |
| 634 | default: |
| 635 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); |
| 636 | } |
| 637 | |
| 638 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); |
| 639 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); |
| 640 | |
| 641 | # undef toggle |
| 642 | |
| 643 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); |
| 644 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); |
| 645 | |
| 646 | /* HNP switch to host or peripheral; and SRP */ |
| 647 | if (otg_change & OTG_PULLUP) { |
| 648 | switch (isp->otg.state) { |
| 649 | case OTG_STATE_B_IDLE: |
| 650 | if (clr & OTG1_DP_PULLUP) |
| 651 | break; |
| 652 | isp->otg.state = OTG_STATE_B_PERIPHERAL; |
| 653 | pr_debug(" --> b_peripheral\n"); |
| 654 | break; |
| 655 | case OTG_STATE_A_SUSPEND: |
| 656 | if (clr & OTG1_DP_PULLUP) |
| 657 | break; |
| 658 | isp->otg.state = OTG_STATE_A_PERIPHERAL; |
| 659 | pr_debug(" --> a_peripheral\n"); |
| 660 | break; |
| 661 | default: |
| 662 | break; |
| 663 | } |
| 664 | OTG_CTRL_REG |= OTG_PULLUP; |
| 665 | } |
| 666 | |
| 667 | check_state(isp, __FUNCTION__); |
| 668 | dump_regs(isp, "otg->isp1301"); |
| 669 | } |
| 670 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 671 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | { |
| 673 | u16 otg_irq = OTG_IRQ_SRC_REG; |
| 674 | u32 otg_ctrl; |
| 675 | int ret = IRQ_NONE; |
| 676 | struct isp1301 *isp = _isp; |
| 677 | |
| 678 | /* update ISP1301 transciever from OTG controller */ |
| 679 | if (otg_irq & OPRT_CHG) { |
| 680 | OTG_IRQ_SRC_REG = OPRT_CHG; |
| 681 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
| 682 | ret = IRQ_HANDLED; |
| 683 | |
| 684 | /* SRP to become b_peripheral failed */ |
| 685 | } else if (otg_irq & B_SRP_TMROUT) { |
| 686 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG); |
| 687 | notresponding(isp); |
| 688 | |
| 689 | /* gadget drivers that care should monitor all kinds of |
| 690 | * remote wakeup (SRP, normal) using their own timer |
| 691 | * to give "check cable and A-device" messages. |
| 692 | */ |
| 693 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) |
| 694 | b_idle(isp, "srp_timeout"); |
| 695 | |
| 696 | OTG_IRQ_SRC_REG = B_SRP_TMROUT; |
| 697 | ret = IRQ_HANDLED; |
| 698 | |
| 699 | /* HNP to become b_host failed */ |
| 700 | } else if (otg_irq & B_HNP_FAIL) { |
| 701 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", |
| 702 | state_name(isp), OTG_CTRL_REG); |
| 703 | notresponding(isp); |
| 704 | |
| 705 | otg_ctrl = OTG_CTRL_REG; |
| 706 | otg_ctrl |= OTG_BUSDROP; |
| 707 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
| 708 | OTG_CTRL_REG = otg_ctrl; |
| 709 | |
| 710 | /* subset of b_peripheral()... */ |
| 711 | isp->otg.state = OTG_STATE_B_PERIPHERAL; |
| 712 | pr_debug(" --> b_peripheral\n"); |
| 713 | |
| 714 | OTG_IRQ_SRC_REG = B_HNP_FAIL; |
| 715 | ret = IRQ_HANDLED; |
| 716 | |
| 717 | /* detect SRP from B-device ... */ |
| 718 | } else if (otg_irq & A_SRP_DETECT) { |
| 719 | pr_debug("otg: %s SRP_DETECT, %06x\n", |
| 720 | state_name(isp), OTG_CTRL_REG); |
| 721 | |
| 722 | isp1301_defer_work(isp, WORK_UPDATE_OTG); |
| 723 | switch (isp->otg.state) { |
| 724 | case OTG_STATE_A_IDLE: |
| 725 | if (!isp->otg.host) |
| 726 | break; |
| 727 | isp1301_defer_work(isp, WORK_HOST_RESUME); |
| 728 | otg_ctrl = OTG_CTRL_REG; |
| 729 | otg_ctrl |= OTG_A_BUSREQ; |
| 730 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) |
| 731 | & ~OTG_XCEIV_INPUTS |
| 732 | & OTG_CTRL_MASK; |
| 733 | OTG_CTRL_REG = otg_ctrl; |
| 734 | break; |
| 735 | default: |
| 736 | break; |
| 737 | } |
| 738 | |
| 739 | OTG_IRQ_SRC_REG = A_SRP_DETECT; |
| 740 | ret = IRQ_HANDLED; |
| 741 | |
| 742 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) |
| 743 | * we don't track them separately |
| 744 | */ |
| 745 | } else if (otg_irq & A_REQ_TMROUT) { |
| 746 | otg_ctrl = OTG_CTRL_REG; |
| 747 | pr_info("otg: BCON_TMOUT from %s, %06x\n", |
| 748 | state_name(isp), otg_ctrl); |
| 749 | notresponding(isp); |
| 750 | |
| 751 | otg_ctrl |= OTG_BUSDROP; |
| 752 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
| 753 | OTG_CTRL_REG = otg_ctrl; |
| 754 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; |
| 755 | |
| 756 | OTG_IRQ_SRC_REG = A_REQ_TMROUT; |
| 757 | ret = IRQ_HANDLED; |
| 758 | |
| 759 | /* A-supplied voltage fell too low; overcurrent */ |
| 760 | } else if (otg_irq & A_VBUS_ERR) { |
| 761 | otg_ctrl = OTG_CTRL_REG; |
| 762 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", |
| 763 | state_name(isp), otg_irq, otg_ctrl); |
| 764 | |
| 765 | otg_ctrl |= OTG_BUSDROP; |
| 766 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
| 767 | OTG_CTRL_REG = otg_ctrl; |
| 768 | isp->otg.state = OTG_STATE_A_VBUS_ERR; |
| 769 | |
| 770 | OTG_IRQ_SRC_REG = A_VBUS_ERR; |
| 771 | ret = IRQ_HANDLED; |
| 772 | |
| 773 | /* switch driver; the transciever code activates it, |
| 774 | * ungating the udc clock or resuming OHCI. |
| 775 | */ |
| 776 | } else if (otg_irq & DRIVER_SWITCH) { |
| 777 | int kick = 0; |
| 778 | |
| 779 | otg_ctrl = OTG_CTRL_REG; |
| 780 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", |
| 781 | state_name(isp), |
| 782 | (otg_ctrl & OTG_DRIVER_SEL) |
| 783 | ? "gadget" : "host", |
| 784 | otg_ctrl); |
| 785 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
| 786 | |
| 787 | /* role is peripheral */ |
| 788 | if (otg_ctrl & OTG_DRIVER_SEL) { |
| 789 | switch (isp->otg.state) { |
| 790 | case OTG_STATE_A_IDLE: |
| 791 | b_idle(isp, __FUNCTION__); |
| 792 | break; |
| 793 | default: |
| 794 | break; |
| 795 | } |
| 796 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
| 797 | |
| 798 | /* role is host */ |
| 799 | } else { |
| 800 | if (!(otg_ctrl & OTG_ID)) { |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 801 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | OTG_CTRL_REG = otg_ctrl | OTG_A_BUSREQ; |
| 803 | } |
| 804 | |
| 805 | if (isp->otg.host) { |
| 806 | switch (isp->otg.state) { |
| 807 | case OTG_STATE_B_WAIT_ACON: |
| 808 | isp->otg.state = OTG_STATE_B_HOST; |
| 809 | pr_debug(" --> b_host\n"); |
| 810 | kick = 1; |
| 811 | break; |
| 812 | case OTG_STATE_A_WAIT_BCON: |
| 813 | isp->otg.state = OTG_STATE_A_HOST; |
| 814 | pr_debug(" --> a_host\n"); |
| 815 | break; |
| 816 | case OTG_STATE_A_PERIPHERAL: |
| 817 | isp->otg.state = OTG_STATE_A_WAIT_BCON; |
| 818 | pr_debug(" --> a_wait_bcon\n"); |
| 819 | break; |
| 820 | default: |
| 821 | break; |
| 822 | } |
| 823 | isp1301_defer_work(isp, WORK_HOST_RESUME); |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | OTG_IRQ_SRC_REG = DRIVER_SWITCH; |
| 828 | ret = IRQ_HANDLED; |
| 829 | |
| 830 | if (kick) |
| 831 | usb_bus_start_enum(isp->otg.host, |
| 832 | isp->otg.host->otg_port); |
| 833 | } |
| 834 | |
| 835 | check_state(isp, __FUNCTION__); |
| 836 | return ret; |
| 837 | } |
| 838 | |
| 839 | static struct platform_device *otg_dev; |
| 840 | |
| 841 | static int otg_init(struct isp1301 *isp) |
| 842 | { |
| 843 | if (!otg_dev) |
| 844 | return -ENODEV; |
| 845 | |
| 846 | dump_regs(isp, __FUNCTION__); |
| 847 | /* some of these values are board-specific... */ |
| 848 | OTG_SYSCON_2_REG |= OTG_EN |
| 849 | /* for B-device: */ |
| 850 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ |
| 851 | | SRP_GPDVBUS /* discharge after VBUS pulse */ |
| 852 | // | (3 << 24) /* 2msec VBUS pulse */ |
| 853 | /* for A-device: */ |
| 854 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ |
| 855 | | SRP_DPW /* detect 167+ns SRP pulses */ |
| 856 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ |
| 857 | ; |
| 858 | |
| 859 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); |
| 860 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); |
| 861 | |
| 862 | check_state(isp, __FUNCTION__); |
| 863 | pr_debug("otg: %s, %s %06x\n", |
| 864 | state_name(isp), __FUNCTION__, OTG_CTRL_REG); |
| 865 | |
| 866 | OTG_IRQ_EN_REG = DRIVER_SWITCH | OPRT_CHG |
| 867 | | B_SRP_TMROUT | B_HNP_FAIL |
| 868 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT; |
| 869 | OTG_SYSCON_2_REG |= OTG_EN; |
| 870 | |
| 871 | return 0; |
| 872 | } |
| 873 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 874 | static int otg_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | { |
| 876 | // struct omap_usb_config *config = dev->platform_data; |
| 877 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 878 | otg_dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | return 0; |
| 880 | } |
| 881 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 882 | static int otg_remove(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | { |
| 884 | otg_dev = 0; |
| 885 | return 0; |
| 886 | } |
| 887 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 888 | struct platform_driver omap_otg_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | .probe = otg_probe, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 890 | .remove = otg_remove, |
| 891 | .driver = { |
| 892 | .owner = THIS_MODULE, |
| 893 | .name = "omap_otg", |
| 894 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | }; |
| 896 | |
| 897 | static int otg_bind(struct isp1301 *isp) |
| 898 | { |
| 899 | int status; |
| 900 | |
| 901 | if (otg_dev) |
| 902 | return -EBUSY; |
| 903 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 904 | status = platform_driver_register(&omap_otg_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | if (status < 0) |
| 906 | return status; |
| 907 | |
| 908 | if (otg_dev) |
| 909 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 910 | IRQF_DISABLED, DRIVER_NAME, isp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | else |
| 912 | status = -ENODEV; |
| 913 | |
| 914 | if (status < 0) |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 915 | platform_driver_unregister(&omap_otg_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | return status; |
| 917 | } |
| 918 | |
| 919 | static void otg_unbind(struct isp1301 *isp) |
| 920 | { |
| 921 | if (!otg_dev) |
| 922 | return; |
| 923 | free_irq(otg_dev->resource[1].start, isp); |
| 924 | } |
| 925 | |
| 926 | #else |
| 927 | |
| 928 | /* OTG controller isn't clocked */ |
| 929 | |
| 930 | #endif /* CONFIG_USB_OTG */ |
| 931 | |
| 932 | /*-------------------------------------------------------------------------*/ |
| 933 | |
| 934 | static void b_peripheral(struct isp1301 *isp) |
| 935 | { |
| 936 | OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; |
| 937 | usb_gadget_vbus_connect(isp->otg.gadget); |
| 938 | |
| 939 | #ifdef CONFIG_USB_OTG |
| 940 | enable_vbus_draw(isp, 8); |
| 941 | otg_update_isp(isp); |
| 942 | #else |
| 943 | enable_vbus_draw(isp, 100); |
| 944 | /* UDC driver just set OTG_BSESSVLD */ |
| 945 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); |
| 946 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); |
| 947 | isp->otg.state = OTG_STATE_B_PERIPHERAL; |
| 948 | pr_debug(" --> b_peripheral\n"); |
| 949 | dump_regs(isp, "2periph"); |
| 950 | #endif |
| 951 | } |
| 952 | |
| 953 | static void isp_update_otg(struct isp1301 *isp, u8 stat) |
| 954 | { |
| 955 | u8 isp_stat, isp_bstat; |
| 956 | enum usb_otg_state state = isp->otg.state; |
| 957 | |
| 958 | if (stat & INTR_BDIS_ACON) |
| 959 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); |
| 960 | |
| 961 | /* start certain state transitions right away */ |
| 962 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); |
| 963 | if (isp_stat & INTR_ID_GND) { |
| 964 | if (isp->otg.default_a) { |
| 965 | switch (state) { |
| 966 | case OTG_STATE_B_IDLE: |
| 967 | a_idle(isp, "idle"); |
| 968 | /* FALLTHROUGH */ |
| 969 | case OTG_STATE_A_IDLE: |
| 970 | enable_vbus_source(isp); |
| 971 | /* FALLTHROUGH */ |
| 972 | case OTG_STATE_A_WAIT_VRISE: |
| 973 | /* we skip over OTG_STATE_A_WAIT_BCON, since |
| 974 | * the HC will transition to A_HOST (or |
| 975 | * A_SUSPEND!) without our noticing except |
| 976 | * when HNP is used. |
| 977 | */ |
| 978 | if (isp_stat & INTR_VBUS_VLD) |
| 979 | isp->otg.state = OTG_STATE_A_HOST; |
| 980 | break; |
| 981 | case OTG_STATE_A_WAIT_VFALL: |
| 982 | if (!(isp_stat & INTR_SESS_VLD)) |
| 983 | a_idle(isp, "vfell"); |
| 984 | break; |
| 985 | default: |
| 986 | if (!(isp_stat & INTR_VBUS_VLD)) |
| 987 | isp->otg.state = OTG_STATE_A_VBUS_ERR; |
| 988 | break; |
| 989 | } |
| 990 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); |
| 991 | } else { |
| 992 | switch (state) { |
| 993 | case OTG_STATE_B_PERIPHERAL: |
| 994 | case OTG_STATE_B_HOST: |
| 995 | case OTG_STATE_B_WAIT_ACON: |
| 996 | usb_gadget_vbus_disconnect(isp->otg.gadget); |
| 997 | break; |
| 998 | default: |
| 999 | break; |
| 1000 | } |
| 1001 | if (state != OTG_STATE_A_IDLE) |
| 1002 | a_idle(isp, "id"); |
| 1003 | if (isp->otg.host && state == OTG_STATE_A_IDLE) |
| 1004 | isp1301_defer_work(isp, WORK_HOST_RESUME); |
| 1005 | isp_bstat = 0; |
| 1006 | } |
| 1007 | } else { |
| 1008 | /* if user unplugged mini-A end of cable, |
| 1009 | * don't bypass A_WAIT_VFALL. |
| 1010 | */ |
| 1011 | if (isp->otg.default_a) { |
| 1012 | switch (state) { |
| 1013 | default: |
| 1014 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; |
| 1015 | break; |
| 1016 | case OTG_STATE_A_WAIT_VFALL: |
| 1017 | state = OTG_STATE_A_IDLE; |
| 1018 | /* khubd may take a while to notice and |
| 1019 | * handle this disconnect, so don't go |
| 1020 | * to B_IDLE quite yet. |
| 1021 | */ |
| 1022 | break; |
| 1023 | case OTG_STATE_A_IDLE: |
| 1024 | host_suspend(isp); |
| 1025 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, |
| 1026 | MC1_BDIS_ACON_EN); |
| 1027 | isp->otg.state = OTG_STATE_B_IDLE; |
| 1028 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_CTRL_MASK |
| 1029 | & ~OTG_CTRL_BITS; |
| 1030 | break; |
| 1031 | case OTG_STATE_B_IDLE: |
| 1032 | break; |
| 1033 | } |
| 1034 | } |
| 1035 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); |
| 1036 | |
| 1037 | switch (isp->otg.state) { |
| 1038 | case OTG_STATE_B_PERIPHERAL: |
| 1039 | case OTG_STATE_B_WAIT_ACON: |
| 1040 | case OTG_STATE_B_HOST: |
| 1041 | if (likely(isp_bstat & OTG_B_SESS_VLD)) |
| 1042 | break; |
| 1043 | enable_vbus_draw(isp, 0); |
| 1044 | #ifndef CONFIG_USB_OTG |
| 1045 | /* UDC driver will clear OTG_BSESSVLD */ |
| 1046 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, |
| 1047 | OTG1_DP_PULLDOWN); |
| 1048 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, |
| 1049 | OTG1_DP_PULLUP); |
| 1050 | dump_regs(isp, __FUNCTION__); |
| 1051 | #endif |
| 1052 | /* FALLTHROUGH */ |
| 1053 | case OTG_STATE_B_SRP_INIT: |
| 1054 | b_idle(isp, __FUNCTION__); |
| 1055 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; |
| 1056 | /* FALLTHROUGH */ |
| 1057 | case OTG_STATE_B_IDLE: |
| 1058 | if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { |
| 1059 | #ifdef CONFIG_USB_OTG |
| 1060 | update_otg1(isp, isp_stat); |
| 1061 | update_otg2(isp, isp_bstat); |
| 1062 | #endif |
| 1063 | b_peripheral(isp); |
| 1064 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) |
| 1065 | isp_bstat |= OTG_B_SESS_END; |
| 1066 | break; |
| 1067 | case OTG_STATE_A_WAIT_VFALL: |
| 1068 | break; |
| 1069 | default: |
| 1070 | pr_debug("otg: unsupported b-device %s\n", |
| 1071 | state_name(isp)); |
| 1072 | break; |
| 1073 | } |
| 1074 | } |
| 1075 | |
| 1076 | if (state != isp->otg.state) |
| 1077 | pr_debug(" isp, %s -> %s\n", |
| 1078 | state_string(state), state_name(isp)); |
| 1079 | |
| 1080 | #ifdef CONFIG_USB_OTG |
| 1081 | /* update the OTG controller state to match the isp1301; may |
| 1082 | * trigger OPRT_CHG irqs for changes going to the isp1301. |
| 1083 | */ |
| 1084 | update_otg1(isp, isp_stat); |
| 1085 | update_otg2(isp, isp_bstat); |
| 1086 | check_state(isp, __FUNCTION__); |
| 1087 | #endif |
| 1088 | |
| 1089 | dump_regs(isp, "isp1301->otg"); |
| 1090 | } |
| 1091 | |
| 1092 | /*-------------------------------------------------------------------------*/ |
| 1093 | |
| 1094 | static u8 isp1301_clear_latch(struct isp1301 *isp) |
| 1095 | { |
| 1096 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); |
| 1097 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); |
| 1098 | return latch; |
| 1099 | } |
| 1100 | |
| 1101 | static void |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1102 | isp1301_work(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | { |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1104 | struct isp1301 *isp = container_of(work, struct isp1301, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | int stop; |
| 1106 | |
| 1107 | /* implicit lock: we're the only task using this device */ |
| 1108 | isp->working = 1; |
| 1109 | do { |
| 1110 | stop = test_bit(WORK_STOP, &isp->todo); |
| 1111 | |
| 1112 | #ifdef CONFIG_USB_OTG |
| 1113 | /* transfer state from otg engine to isp1301 */ |
| 1114 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { |
| 1115 | otg_update_isp(isp); |
| 1116 | put_device(&isp->client.dev); |
| 1117 | } |
| 1118 | #endif |
| 1119 | /* transfer state from isp1301 to otg engine */ |
| 1120 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { |
| 1121 | u8 stat = isp1301_clear_latch(isp); |
| 1122 | |
| 1123 | isp_update_otg(isp, stat); |
| 1124 | put_device(&isp->client.dev); |
| 1125 | } |
| 1126 | |
| 1127 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { |
| 1128 | u32 otg_ctrl; |
| 1129 | |
| 1130 | /* |
| 1131 | * skip A_WAIT_VRISE; hc transitions invisibly |
| 1132 | * skip A_WAIT_BCON; same. |
| 1133 | */ |
| 1134 | switch (isp->otg.state) { |
| 1135 | case OTG_STATE_A_WAIT_BCON: |
| 1136 | case OTG_STATE_A_WAIT_VRISE: |
| 1137 | isp->otg.state = OTG_STATE_A_HOST; |
| 1138 | pr_debug(" --> a_host\n"); |
| 1139 | otg_ctrl = OTG_CTRL_REG; |
| 1140 | otg_ctrl |= OTG_A_BUSREQ; |
| 1141 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) |
| 1142 | & OTG_CTRL_MASK; |
| 1143 | OTG_CTRL_REG = otg_ctrl; |
| 1144 | break; |
| 1145 | case OTG_STATE_B_WAIT_ACON: |
| 1146 | isp->otg.state = OTG_STATE_B_HOST; |
| 1147 | pr_debug(" --> b_host (acon)\n"); |
| 1148 | break; |
| 1149 | case OTG_STATE_B_HOST: |
| 1150 | case OTG_STATE_B_IDLE: |
| 1151 | case OTG_STATE_A_IDLE: |
| 1152 | break; |
| 1153 | default: |
| 1154 | pr_debug(" host resume in %s\n", |
| 1155 | state_name(isp)); |
| 1156 | } |
| 1157 | host_resume(isp); |
| 1158 | // mdelay(10); |
| 1159 | put_device(&isp->client.dev); |
| 1160 | } |
| 1161 | |
| 1162 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { |
| 1163 | #ifdef VERBOSE |
| 1164 | dump_regs(isp, "timer"); |
| 1165 | if (!stop) |
| 1166 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); |
| 1167 | #endif |
| 1168 | put_device(&isp->client.dev); |
| 1169 | } |
| 1170 | |
| 1171 | if (isp->todo) |
| 1172 | dev_vdbg(&isp->client.dev, |
| 1173 | "work done, todo = 0x%lx\n", |
| 1174 | isp->todo); |
| 1175 | if (stop) { |
| 1176 | dev_dbg(&isp->client.dev, "stop\n"); |
| 1177 | break; |
| 1178 | } |
| 1179 | } while (isp->todo); |
| 1180 | isp->working = 0; |
| 1181 | } |
| 1182 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1183 | static irqreturn_t isp1301_irq(int irq, void *isp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | { |
| 1185 | isp1301_defer_work(isp, WORK_UPDATE_OTG); |
| 1186 | return IRQ_HANDLED; |
| 1187 | } |
| 1188 | |
| 1189 | static void isp1301_timer(unsigned long _isp) |
| 1190 | { |
| 1191 | isp1301_defer_work((void *)_isp, WORK_TIMER); |
| 1192 | } |
| 1193 | |
| 1194 | /*-------------------------------------------------------------------------*/ |
| 1195 | |
| 1196 | static void isp1301_release(struct device *dev) |
| 1197 | { |
| 1198 | struct isp1301 *isp; |
| 1199 | |
| 1200 | isp = container_of(dev, struct isp1301, client.dev); |
| 1201 | |
| 1202 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ |
| 1203 | if (isp->i2c_release) |
| 1204 | isp->i2c_release(dev); |
| 1205 | kfree (isp); |
| 1206 | } |
| 1207 | |
| 1208 | static struct isp1301 *the_transceiver; |
| 1209 | |
| 1210 | static int isp1301_detach_client(struct i2c_client *i2c) |
| 1211 | { |
| 1212 | struct isp1301 *isp; |
| 1213 | |
| 1214 | isp = container_of(i2c, struct isp1301, client); |
| 1215 | |
| 1216 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); |
| 1217 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); |
| 1218 | free_irq(isp->irq, isp); |
| 1219 | #ifdef CONFIG_USB_OTG |
| 1220 | otg_unbind(isp); |
| 1221 | #endif |
| 1222 | if (machine_is_omap_h2()) |
| 1223 | omap_free_gpio(2); |
| 1224 | |
| 1225 | isp->timer.data = 0; |
| 1226 | set_bit(WORK_STOP, &isp->todo); |
| 1227 | del_timer_sync(&isp->timer); |
| 1228 | flush_scheduled_work(); |
| 1229 | |
| 1230 | put_device(&i2c->dev); |
| 1231 | the_transceiver = 0; |
| 1232 | |
| 1233 | return i2c_detach_client(i2c); |
| 1234 | } |
| 1235 | |
| 1236 | /*-------------------------------------------------------------------------*/ |
| 1237 | |
| 1238 | /* NOTE: three modes are possible here, only one of which |
| 1239 | * will be standards-conformant on any given system: |
| 1240 | * |
| 1241 | * - OTG mode (dual-role), required if there's a Mini-AB connector |
| 1242 | * - HOST mode, for when there's one or more A (host) connectors |
| 1243 | * - DEVICE mode, for when there's a B/Mini-B (device) connector |
| 1244 | * |
| 1245 | * As a rule, you won't have an isp1301 chip unless it's there to |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1246 | * support the OTG mode. Other modes help testing USB controllers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | * in isolation from (full) OTG support, or maybe so later board |
| 1248 | * revisions can help to support those feature. |
| 1249 | */ |
| 1250 | |
| 1251 | #ifdef CONFIG_USB_OTG |
| 1252 | |
| 1253 | static int isp1301_otg_enable(struct isp1301 *isp) |
| 1254 | { |
| 1255 | power_up(isp); |
| 1256 | otg_init(isp); |
| 1257 | |
| 1258 | /* NOTE: since we don't change this, this provides |
| 1259 | * a few more interrupts than are strictly needed. |
| 1260 | */ |
| 1261 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1262 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1264 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
| 1266 | dev_info(&isp->client.dev, "ready for dual-role USB ...\n"); |
| 1267 | |
| 1268 | return 0; |
| 1269 | } |
| 1270 | |
| 1271 | #endif |
| 1272 | |
| 1273 | /* add or disable the host device+driver */ |
| 1274 | static int |
| 1275 | isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) |
| 1276 | { |
| 1277 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); |
| 1278 | |
| 1279 | if (!otg || isp != the_transceiver) |
| 1280 | return -ENODEV; |
| 1281 | |
| 1282 | if (!host) { |
| 1283 | OTG_IRQ_EN_REG = 0; |
| 1284 | power_down(isp); |
| 1285 | isp->otg.host = 0; |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | #ifdef CONFIG_USB_OTG |
| 1290 | isp->otg.host = host; |
| 1291 | dev_dbg(&isp->client.dev, "registered host\n"); |
| 1292 | host_suspend(isp); |
| 1293 | if (isp->otg.gadget) |
| 1294 | return isp1301_otg_enable(isp); |
| 1295 | return 0; |
| 1296 | |
| 1297 | #elif !defined(CONFIG_USB_GADGET_OMAP) |
| 1298 | // FIXME update its refcount |
| 1299 | isp->otg.host = host; |
| 1300 | |
| 1301 | power_up(isp); |
| 1302 | |
| 1303 | if (machine_is_omap_h2()) |
| 1304 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
| 1305 | |
| 1306 | dev_info(&isp->client.dev, "A-Host sessions ok\n"); |
| 1307 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1308 | INTR_ID_GND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1310 | INTR_ID_GND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | |
| 1312 | /* If this has a Mini-AB connector, this mode is highly |
| 1313 | * nonstandard ... but can be handy for testing, especially with |
| 1314 | * the Mini-A end of an OTG cable. (Or something nonstandard |
| 1315 | * like MiniB-to-StandardB, maybe built with a gender mender.) |
| 1316 | */ |
| 1317 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); |
| 1318 | |
| 1319 | dump_regs(isp, __FUNCTION__); |
| 1320 | |
| 1321 | return 0; |
| 1322 | |
| 1323 | #else |
| 1324 | dev_dbg(&isp->client.dev, "host sessions not allowed\n"); |
| 1325 | return -EINVAL; |
| 1326 | #endif |
| 1327 | |
| 1328 | } |
| 1329 | |
| 1330 | static int |
| 1331 | isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) |
| 1332 | { |
| 1333 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); |
| 1334 | |
| 1335 | if (!otg || isp != the_transceiver) |
| 1336 | return -ENODEV; |
| 1337 | |
| 1338 | if (!gadget) { |
| 1339 | OTG_IRQ_EN_REG = 0; |
| 1340 | if (!isp->otg.default_a) |
| 1341 | enable_vbus_draw(isp, 0); |
| 1342 | usb_gadget_vbus_disconnect(isp->otg.gadget); |
| 1343 | isp->otg.gadget = 0; |
| 1344 | power_down(isp); |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
| 1348 | #ifdef CONFIG_USB_OTG |
| 1349 | isp->otg.gadget = gadget; |
| 1350 | dev_dbg(&isp->client.dev, "registered gadget\n"); |
| 1351 | /* gadget driver may be suspended until vbus_connect () */ |
| 1352 | if (isp->otg.host) |
| 1353 | return isp1301_otg_enable(isp); |
| 1354 | return 0; |
| 1355 | |
| 1356 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) |
| 1357 | isp->otg.gadget = gadget; |
| 1358 | // FIXME update its refcount |
| 1359 | |
| 1360 | OTG_CTRL_REG = (OTG_CTRL_REG & OTG_CTRL_MASK |
| 1361 | & ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS)) |
| 1362 | | OTG_ID; |
| 1363 | power_up(isp); |
| 1364 | isp->otg.state = OTG_STATE_B_IDLE; |
| 1365 | |
| 1366 | if (machine_is_omap_h2()) |
| 1367 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
| 1368 | |
| 1369 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1370 | INTR_SESS_VLD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1372 | INTR_VBUS_VLD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | dev_info(&isp->client.dev, "B-Peripheral sessions ok\n"); |
| 1374 | dump_regs(isp, __FUNCTION__); |
| 1375 | |
| 1376 | /* If this has a Mini-AB connector, this mode is highly |
| 1377 | * nonstandard ... but can be handy for testing, so long |
| 1378 | * as you don't plug a Mini-A cable into the jack. |
| 1379 | */ |
| 1380 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) |
| 1381 | b_peripheral(isp); |
| 1382 | |
| 1383 | return 0; |
| 1384 | |
| 1385 | #else |
| 1386 | dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n"); |
| 1387 | return -EINVAL; |
| 1388 | #endif |
| 1389 | } |
| 1390 | |
| 1391 | |
| 1392 | /*-------------------------------------------------------------------------*/ |
| 1393 | |
| 1394 | static int |
| 1395 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) |
| 1396 | { |
| 1397 | if (!the_transceiver) |
| 1398 | return -ENODEV; |
| 1399 | if (dev->state == OTG_STATE_B_PERIPHERAL) |
| 1400 | enable_vbus_draw(the_transceiver, mA); |
| 1401 | return 0; |
| 1402 | } |
| 1403 | |
| 1404 | static int |
| 1405 | isp1301_start_srp(struct otg_transceiver *dev) |
| 1406 | { |
| 1407 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); |
| 1408 | u32 otg_ctrl; |
| 1409 | |
| 1410 | if (!dev || isp != the_transceiver |
| 1411 | || isp->otg.state != OTG_STATE_B_IDLE) |
| 1412 | return -ENODEV; |
| 1413 | |
| 1414 | otg_ctrl = OTG_CTRL_REG; |
| 1415 | if (!(otg_ctrl & OTG_BSESSEND)) |
| 1416 | return -EINVAL; |
| 1417 | |
| 1418 | otg_ctrl |= OTG_B_BUSREQ; |
| 1419 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; |
| 1420 | OTG_CTRL_REG = otg_ctrl; |
| 1421 | isp->otg.state = OTG_STATE_B_SRP_INIT; |
| 1422 | |
| 1423 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), OTG_CTRL_REG); |
| 1424 | #ifdef CONFIG_USB_OTG |
| 1425 | check_state(isp, __FUNCTION__); |
| 1426 | #endif |
| 1427 | return 0; |
| 1428 | } |
| 1429 | |
| 1430 | static int |
| 1431 | isp1301_start_hnp(struct otg_transceiver *dev) |
| 1432 | { |
| 1433 | #ifdef CONFIG_USB_OTG |
| 1434 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); |
| 1435 | |
| 1436 | if (!dev || isp != the_transceiver) |
| 1437 | return -ENODEV; |
| 1438 | if (isp->otg.default_a && (isp->otg.host == NULL |
| 1439 | || !isp->otg.host->b_hnp_enable)) |
| 1440 | return -ENOTCONN; |
| 1441 | if (!isp->otg.default_a && (isp->otg.gadget == NULL |
| 1442 | || !isp->otg.gadget->b_hnp_enable)) |
| 1443 | return -ENOTCONN; |
| 1444 | |
| 1445 | /* We want hardware to manage most HNP protocol timings. |
| 1446 | * So do this part as early as possible... |
| 1447 | */ |
| 1448 | switch (isp->otg.state) { |
| 1449 | case OTG_STATE_B_HOST: |
| 1450 | isp->otg.state = OTG_STATE_B_PERIPHERAL; |
| 1451 | /* caller will suspend next */ |
| 1452 | break; |
| 1453 | case OTG_STATE_A_HOST: |
| 1454 | #if 0 |
| 1455 | /* autoconnect mode avoids irq latency bugs */ |
| 1456 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, |
| 1457 | MC1_BDIS_ACON_EN); |
| 1458 | #endif |
| 1459 | /* caller must suspend then clear A_BUSREQ */ |
| 1460 | usb_gadget_vbus_connect(isp->otg.gadget); |
| 1461 | OTG_CTRL_REG |= OTG_A_SETB_HNPEN; |
| 1462 | |
| 1463 | break; |
| 1464 | case OTG_STATE_A_PERIPHERAL: |
| 1465 | /* initiated by B-Host suspend */ |
| 1466 | break; |
| 1467 | default: |
| 1468 | return -EILSEQ; |
| 1469 | } |
| 1470 | pr_debug("otg: HNP %s, %06x ...\n", |
| 1471 | state_name(isp), OTG_CTRL_REG); |
| 1472 | check_state(isp, __FUNCTION__); |
| 1473 | return 0; |
| 1474 | #else |
| 1475 | /* srp-only */ |
| 1476 | return -EINVAL; |
| 1477 | #endif |
| 1478 | } |
| 1479 | |
| 1480 | /*-------------------------------------------------------------------------*/ |
| 1481 | |
| 1482 | /* no error returns, they'd just make bus scanning stop */ |
| 1483 | static int isp1301_probe(struct i2c_adapter *bus, int address, int kind) |
| 1484 | { |
| 1485 | int status; |
| 1486 | struct isp1301 *isp; |
| 1487 | struct i2c_client *i2c; |
| 1488 | |
| 1489 | if (the_transceiver) |
| 1490 | return 0; |
| 1491 | |
Pekka Enberg | 82ca76b | 2005-09-06 15:18:35 -0700 | [diff] [blame] | 1492 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | if (!isp) |
| 1494 | return 0; |
| 1495 | |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1496 | INIT_WORK(&isp->work, isp1301_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | init_timer(&isp->timer); |
| 1498 | isp->timer.function = isp1301_timer; |
| 1499 | isp->timer.data = (unsigned long) isp; |
| 1500 | |
| 1501 | isp->irq = -1; |
| 1502 | isp->client.addr = address; |
| 1503 | i2c_set_clientdata(&isp->client, isp); |
| 1504 | isp->client.adapter = bus; |
| 1505 | isp->client.driver = &isp1301_driver; |
| 1506 | strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE); |
| 1507 | i2c = &isp->client; |
| 1508 | |
| 1509 | /* if this is a true probe, verify the chip ... */ |
| 1510 | if (kind < 0) { |
| 1511 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); |
| 1512 | if (status != I2C_VENDOR_ID_PHILIPS) { |
| 1513 | dev_dbg(&bus->dev, "addr %d not philips id: %d\n", |
| 1514 | address, status); |
| 1515 | goto fail1; |
| 1516 | } |
| 1517 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); |
| 1518 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { |
| 1519 | dev_dbg(&bus->dev, "%d not isp1301, %d\n", |
| 1520 | address, status); |
| 1521 | goto fail1; |
| 1522 | } |
| 1523 | } |
| 1524 | |
| 1525 | status = i2c_attach_client(i2c); |
| 1526 | if (status < 0) { |
| 1527 | dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", |
| 1528 | DRIVER_NAME, address, status); |
| 1529 | fail1: |
| 1530 | kfree(isp); |
| 1531 | return 0; |
| 1532 | } |
| 1533 | isp->i2c_release = i2c->dev.release; |
| 1534 | i2c->dev.release = isp1301_release; |
| 1535 | |
| 1536 | /* initial development used chiprev 2.00 */ |
| 1537 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); |
| 1538 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", |
| 1539 | status >> 8, status & 0xff); |
| 1540 | |
| 1541 | /* make like power-on reset */ |
| 1542 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); |
| 1543 | |
| 1544 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); |
| 1545 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); |
| 1546 | |
| 1547 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, |
| 1548 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); |
| 1549 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, |
| 1550 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); |
| 1551 | |
| 1552 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); |
| 1553 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); |
| 1554 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); |
| 1555 | |
| 1556 | #ifdef CONFIG_USB_OTG |
| 1557 | status = otg_bind(isp); |
| 1558 | if (status < 0) { |
| 1559 | dev_dbg(&i2c->dev, "can't bind OTG\n"); |
| 1560 | goto fail2; |
| 1561 | } |
| 1562 | #endif |
| 1563 | |
| 1564 | if (machine_is_omap_h2()) { |
| 1565 | /* full speed signaling by default */ |
| 1566 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, |
| 1567 | MC1_SPEED_REG); |
| 1568 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, |
| 1569 | MC2_SPD_SUSP_CTRL); |
| 1570 | |
| 1571 | /* IRQ wired at M14 */ |
| 1572 | omap_cfg_reg(M14_1510_GPIO2); |
| 1573 | isp->irq = OMAP_GPIO_IRQ(2); |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1574 | if (gpio_request(2, "isp1301") == 0) |
| 1575 | gpio_direction_input(2); |
| 1576 | isp->irq_type = IRQF_TRIGGER_FALLING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | } |
| 1578 | |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1579 | isp->irq_type |= IRQF_SAMPLE_RANDOM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | status = request_irq(isp->irq, isp1301_irq, |
David Brownell | 25da383 | 2007-08-14 18:37:14 +0200 | [diff] [blame] | 1581 | isp->irq_type, DRIVER_NAME, isp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | if (status < 0) { |
| 1583 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", |
| 1584 | isp->irq, status); |
| 1585 | #ifdef CONFIG_USB_OTG |
| 1586 | fail2: |
| 1587 | #endif |
| 1588 | i2c_detach_client(i2c); |
| 1589 | goto fail1; |
| 1590 | } |
| 1591 | |
| 1592 | isp->otg.dev = &isp->client.dev; |
| 1593 | isp->otg.label = DRIVER_NAME; |
| 1594 | |
| 1595 | isp->otg.set_host = isp1301_set_host, |
| 1596 | isp->otg.set_peripheral = isp1301_set_peripheral, |
| 1597 | isp->otg.set_power = isp1301_set_power, |
| 1598 | isp->otg.start_srp = isp1301_start_srp, |
| 1599 | isp->otg.start_hnp = isp1301_start_hnp, |
| 1600 | |
| 1601 | enable_vbus_draw(isp, 0); |
| 1602 | power_down(isp); |
| 1603 | the_transceiver = isp; |
| 1604 | |
| 1605 | #ifdef CONFIG_USB_OTG |
| 1606 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); |
| 1607 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); |
| 1608 | #endif |
| 1609 | |
| 1610 | dump_regs(isp, __FUNCTION__); |
| 1611 | |
| 1612 | #ifdef VERBOSE |
| 1613 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); |
| 1614 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); |
| 1615 | #endif |
| 1616 | |
| 1617 | status = otg_set_transceiver(&isp->otg); |
| 1618 | if (status < 0) |
| 1619 | dev_err(&i2c->dev, "can't register transceiver, %d\n", |
| 1620 | status); |
| 1621 | |
| 1622 | return 0; |
| 1623 | } |
| 1624 | |
| 1625 | static int isp1301_scan_bus(struct i2c_adapter *bus) |
| 1626 | { |
| 1627 | if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA |
| 1628 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) |
| 1629 | return -EINVAL; |
| 1630 | return i2c_probe(bus, &addr_data, isp1301_probe); |
| 1631 | } |
| 1632 | |
| 1633 | static struct i2c_driver isp1301_driver = { |
Laurent Riffard | a9718b0 | 2005-11-26 20:36:00 +0100 | [diff] [blame] | 1634 | .driver = { |
Laurent Riffard | a9718b0 | 2005-11-26 20:36:00 +0100 | [diff] [blame] | 1635 | .name = "isp1301_omap", |
| 1636 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | .attach_adapter = isp1301_scan_bus, |
| 1638 | .detach_client = isp1301_detach_client, |
| 1639 | }; |
| 1640 | |
| 1641 | /*-------------------------------------------------------------------------*/ |
| 1642 | |
| 1643 | static int __init isp_init(void) |
| 1644 | { |
| 1645 | return i2c_add_driver(&isp1301_driver); |
| 1646 | } |
| 1647 | module_init(isp_init); |
| 1648 | |
| 1649 | static void __exit isp_exit(void) |
| 1650 | { |
| 1651 | if (the_transceiver) |
| 1652 | otg_set_transceiver(0); |
| 1653 | i2c_del_driver(&isp1301_driver); |
| 1654 | } |
| 1655 | module_exit(isp_exit); |
| 1656 | |