Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 1 | /* |
| 2 | * core.c - ChipIdea USB IP core family device controller |
| 3 | * |
| 4 | * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. |
| 5 | * |
| 6 | * Author: David Lopo |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | /* |
| 14 | * Description: ChipIdea USB IP core family device controller |
| 15 | * |
| 16 | * This driver is composed of several blocks: |
| 17 | * - HW: hardware interface |
| 18 | * - DBG: debug facilities (optional) |
| 19 | * - UTIL: utilities |
| 20 | * - ISR: interrupts handling |
| 21 | * - ENDPT: endpoint operations (Gadget API) |
| 22 | * - GADGET: gadget operations (Gadget API) |
| 23 | * - BUS: bus glue code, bus abstraction layer |
| 24 | * |
| 25 | * Compile Options |
| 26 | * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities |
| 27 | * - STALL_IN: non-empty bulk-in pipes cannot be halted |
| 28 | * if defined mass storage compliance succeeds but with warnings |
| 29 | * => case 4: Hi > Dn |
| 30 | * => case 5: Hi > Di |
| 31 | * => case 8: Hi <> Do |
| 32 | * if undefined usbtest 13 fails |
| 33 | * - TRACE: enable function tracing (depends on DEBUG) |
| 34 | * |
| 35 | * Main Features |
| 36 | * - Chapter 9 & Mass Storage Compliance with Gadget File Storage |
| 37 | * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined) |
| 38 | * - Normal & LPM support |
| 39 | * |
| 40 | * USBTEST Report |
| 41 | * - OK: 0-12, 13 (STALL_IN defined) & 14 |
| 42 | * - Not Supported: 15 & 16 (ISO) |
| 43 | * |
| 44 | * TODO List |
| 45 | * - OTG |
Michael Grzeschik | e4ce4ec | 2013-06-13 17:59:47 +0300 | [diff] [blame] | 46 | * - Interrupt Traffic |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 47 | * - GET_STATUS(device) - always reports 0 |
| 48 | * - Gadget API (majority of optional features) |
| 49 | * - Suspend & Remote Wakeup |
| 50 | */ |
| 51 | #include <linux/delay.h> |
| 52 | #include <linux/device.h> |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 53 | #include <linux/dma-mapping.h> |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 54 | #include <linux/platform_device.h> |
| 55 | #include <linux/module.h> |
Richard Zhao | fe6e125 | 2012-07-07 22:56:42 +0800 | [diff] [blame] | 56 | #include <linux/idr.h> |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 57 | #include <linux/interrupt.h> |
| 58 | #include <linux/io.h> |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 59 | #include <linux/kernel.h> |
| 60 | #include <linux/slab.h> |
| 61 | #include <linux/pm_runtime.h> |
| 62 | #include <linux/usb/ch9.h> |
| 63 | #include <linux/usb/gadget.h> |
| 64 | #include <linux/usb/otg.h> |
| 65 | #include <linux/usb/chipidea.h> |
Michael Grzeschik | 40dcd0e | 2013-06-13 17:59:56 +0300 | [diff] [blame] | 66 | #include <linux/usb/of.h> |
| 67 | #include <linux/phy.h> |
Peter Chen | 1542d9c | 2013-08-14 12:44:03 +0300 | [diff] [blame] | 68 | #include <linux/regulator/consumer.h> |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 69 | |
| 70 | #include "ci.h" |
| 71 | #include "udc.h" |
| 72 | #include "bits.h" |
Alexander Shishkin | eb70e5a | 2012-05-11 17:25:54 +0300 | [diff] [blame] | 73 | #include "host.h" |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 74 | #include "debug.h" |
Peter Chen | c10b4f0 | 2013-08-14 12:44:06 +0300 | [diff] [blame] | 75 | #include "otg.h" |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 76 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 77 | /* Controller register map */ |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 78 | static uintptr_t ci_regs_nolpm[] = { |
| 79 | [CAP_CAPLENGTH] = 0x000UL, |
| 80 | [CAP_HCCPARAMS] = 0x008UL, |
| 81 | [CAP_DCCPARAMS] = 0x024UL, |
| 82 | [CAP_TESTMODE] = 0x038UL, |
| 83 | [OP_USBCMD] = 0x000UL, |
| 84 | [OP_USBSTS] = 0x004UL, |
| 85 | [OP_USBINTR] = 0x008UL, |
| 86 | [OP_DEVICEADDR] = 0x014UL, |
| 87 | [OP_ENDPTLISTADDR] = 0x018UL, |
| 88 | [OP_PORTSC] = 0x044UL, |
| 89 | [OP_DEVLC] = 0x084UL, |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 90 | [OP_OTGSC] = 0x064UL, |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 91 | [OP_USBMODE] = 0x068UL, |
| 92 | [OP_ENDPTSETUPSTAT] = 0x06CUL, |
| 93 | [OP_ENDPTPRIME] = 0x070UL, |
| 94 | [OP_ENDPTFLUSH] = 0x074UL, |
| 95 | [OP_ENDPTSTAT] = 0x078UL, |
| 96 | [OP_ENDPTCOMPLETE] = 0x07CUL, |
| 97 | [OP_ENDPTCTRL] = 0x080UL, |
| 98 | }; |
| 99 | |
| 100 | static uintptr_t ci_regs_lpm[] = { |
| 101 | [CAP_CAPLENGTH] = 0x000UL, |
| 102 | [CAP_HCCPARAMS] = 0x008UL, |
| 103 | [CAP_DCCPARAMS] = 0x024UL, |
| 104 | [CAP_TESTMODE] = 0x0FCUL, |
| 105 | [OP_USBCMD] = 0x000UL, |
| 106 | [OP_USBSTS] = 0x004UL, |
| 107 | [OP_USBINTR] = 0x008UL, |
| 108 | [OP_DEVICEADDR] = 0x014UL, |
| 109 | [OP_ENDPTLISTADDR] = 0x018UL, |
| 110 | [OP_PORTSC] = 0x044UL, |
| 111 | [OP_DEVLC] = 0x084UL, |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 112 | [OP_OTGSC] = 0x0C4UL, |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 113 | [OP_USBMODE] = 0x0C8UL, |
| 114 | [OP_ENDPTSETUPSTAT] = 0x0D8UL, |
| 115 | [OP_ENDPTPRIME] = 0x0DCUL, |
| 116 | [OP_ENDPTFLUSH] = 0x0E0UL, |
| 117 | [OP_ENDPTSTAT] = 0x0E4UL, |
| 118 | [OP_ENDPTCOMPLETE] = 0x0E8UL, |
| 119 | [OP_ENDPTCTRL] = 0x0ECUL, |
| 120 | }; |
| 121 | |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 122 | static int hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 123 | { |
| 124 | int i; |
| 125 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 126 | kfree(ci->hw_bank.regmap); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 127 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 128 | ci->hw_bank.regmap = kzalloc((OP_LAST + 1) * sizeof(void *), |
| 129 | GFP_KERNEL); |
| 130 | if (!ci->hw_bank.regmap) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 131 | return -ENOMEM; |
| 132 | |
| 133 | for (i = 0; i < OP_ENDPTCTRL; i++) |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 134 | ci->hw_bank.regmap[i] = |
| 135 | (i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) + |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 136 | (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]); |
| 137 | |
| 138 | for (; i <= OP_LAST; i++) |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 139 | ci->hw_bank.regmap[i] = ci->hw_bank.op + |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 140 | 4 * (i - OP_ENDPTCTRL) + |
| 141 | (is_lpm |
| 142 | ? ci_regs_lpm[OP_ENDPTCTRL] |
| 143 | : ci_regs_nolpm[OP_ENDPTCTRL]); |
| 144 | |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * hw_port_test_set: writes port test mode (execute without interruption) |
| 150 | * @mode: new value |
| 151 | * |
| 152 | * This function returns an error code |
| 153 | */ |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 154 | int hw_port_test_set(struct ci_hdrc *ci, u8 mode) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 155 | { |
| 156 | const u8 TEST_MODE_MAX = 7; |
| 157 | |
| 158 | if (mode > TEST_MODE_MAX) |
| 159 | return -EINVAL; |
| 160 | |
Felipe Balbi | 727b4dd | 2013-03-30 12:53:55 +0200 | [diff] [blame] | 161 | hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC)); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * hw_port_test_get: reads port test mode value |
| 167 | * |
| 168 | * This function returns port test mode value |
| 169 | */ |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 170 | u8 hw_port_test_get(struct ci_hdrc *ci) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 171 | { |
Felipe Balbi | 727b4dd | 2013-03-30 12:53:55 +0200 | [diff] [blame] | 172 | return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 173 | } |
| 174 | |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 175 | static int hw_device_init(struct ci_hdrc *ci, void __iomem *base) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 176 | { |
| 177 | u32 reg; |
| 178 | |
| 179 | /* bank is a module variable */ |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 180 | ci->hw_bank.abs = base; |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 181 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 182 | ci->hw_bank.cap = ci->hw_bank.abs; |
Richard Zhao | 77c4400 | 2012-06-29 17:48:53 +0800 | [diff] [blame] | 183 | ci->hw_bank.cap += ci->platdata->capoffset; |
Svetoslav Neykov | 938d323 | 2013-03-30 12:54:03 +0200 | [diff] [blame] | 184 | ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 185 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 186 | hw_alloc_regmap(ci, false); |
| 187 | reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >> |
Felipe Balbi | 727b4dd | 2013-03-30 12:53:55 +0200 | [diff] [blame] | 188 | __ffs(HCCPARAMS_LEN); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 189 | ci->hw_bank.lpm = reg; |
| 190 | hw_alloc_regmap(ci, !!reg); |
| 191 | ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs; |
| 192 | ci->hw_bank.size += OP_LAST; |
| 193 | ci->hw_bank.size /= sizeof(u32); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 194 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 195 | reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >> |
Felipe Balbi | 727b4dd | 2013-03-30 12:53:55 +0200 | [diff] [blame] | 196 | __ffs(DCCPARAMS_DEN); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 197 | ci->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */ |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 198 | |
Richard Zhao | 09c94e6 | 2012-05-15 21:58:18 +0800 | [diff] [blame] | 199 | if (ci->hw_ep_max > ENDPT_MAX) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 200 | return -ENODEV; |
| 201 | |
Peter Chen | c344b51 | 2013-08-14 12:44:09 +0300 | [diff] [blame^] | 202 | /* Disable all interrupts bits */ |
| 203 | hw_write(ci, OP_USBINTR, 0xffffffff, 0); |
| 204 | |
| 205 | /* Clear all interrupts status bits*/ |
| 206 | hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff); |
| 207 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 208 | dev_dbg(ci->dev, "ChipIdea HDRC found, lpm: %d; cap: %p op: %p\n", |
| 209 | ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 210 | |
| 211 | /* setup lock mode ? */ |
| 212 | |
| 213 | /* ENDPTSETUPSTAT is '0' by default */ |
| 214 | |
| 215 | /* HCSPARAMS.bf.ppc SHOULD BE zero for device */ |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 220 | static void hw_phymode_configure(struct ci_hdrc *ci) |
Michael Grzeschik | 40dcd0e | 2013-06-13 17:59:56 +0300 | [diff] [blame] | 221 | { |
| 222 | u32 portsc, lpm, sts; |
| 223 | |
| 224 | switch (ci->platdata->phy_mode) { |
| 225 | case USBPHY_INTERFACE_MODE_UTMI: |
| 226 | portsc = PORTSC_PTS(PTS_UTMI); |
| 227 | lpm = DEVLC_PTS(PTS_UTMI); |
| 228 | break; |
| 229 | case USBPHY_INTERFACE_MODE_UTMIW: |
| 230 | portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW; |
| 231 | lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW; |
| 232 | break; |
| 233 | case USBPHY_INTERFACE_MODE_ULPI: |
| 234 | portsc = PORTSC_PTS(PTS_ULPI); |
| 235 | lpm = DEVLC_PTS(PTS_ULPI); |
| 236 | break; |
| 237 | case USBPHY_INTERFACE_MODE_SERIAL: |
| 238 | portsc = PORTSC_PTS(PTS_SERIAL); |
| 239 | lpm = DEVLC_PTS(PTS_SERIAL); |
| 240 | sts = 1; |
| 241 | break; |
| 242 | case USBPHY_INTERFACE_MODE_HSIC: |
| 243 | portsc = PORTSC_PTS(PTS_HSIC); |
| 244 | lpm = DEVLC_PTS(PTS_HSIC); |
| 245 | break; |
| 246 | default: |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | if (ci->hw_bank.lpm) { |
| 251 | hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm); |
| 252 | hw_write(ci, OP_DEVLC, DEVLC_STS, sts); |
| 253 | } else { |
| 254 | hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc); |
| 255 | hw_write(ci, OP_PORTSC, PORTSC_STS, sts); |
| 256 | } |
| 257 | } |
| 258 | |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 259 | /** |
| 260 | * hw_device_reset: resets chip (execute without interruption) |
| 261 | * @ci: the controller |
| 262 | * |
| 263 | * This function returns an error code |
| 264 | */ |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 265 | int hw_device_reset(struct ci_hdrc *ci, u32 mode) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 266 | { |
| 267 | /* should flush & stop before reset */ |
| 268 | hw_write(ci, OP_ENDPTFLUSH, ~0, ~0); |
| 269 | hw_write(ci, OP_USBCMD, USBCMD_RS, 0); |
| 270 | |
| 271 | hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST); |
| 272 | while (hw_read(ci, OP_USBCMD, USBCMD_RST)) |
| 273 | udelay(10); /* not RTOS friendly */ |
| 274 | |
Richard Zhao | 77c4400 | 2012-06-29 17:48:53 +0800 | [diff] [blame] | 275 | if (ci->platdata->notify_event) |
| 276 | ci->platdata->notify_event(ci, |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 277 | CI_HDRC_CONTROLLER_RESET_EVENT); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 278 | |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 279 | if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING) |
Alexander Shishkin | 758fc98 | 2012-05-11 17:25:53 +0300 | [diff] [blame] | 280 | hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 281 | |
| 282 | /* USBMODE should be configured step by step */ |
| 283 | hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE); |
Alexander Shishkin | eb70e5a | 2012-05-11 17:25:54 +0300 | [diff] [blame] | 284 | hw_write(ci, OP_USBMODE, USBMODE_CM, mode); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 285 | /* HW >= 2.3 */ |
| 286 | hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); |
| 287 | |
Alexander Shishkin | eb70e5a | 2012-05-11 17:25:54 +0300 | [diff] [blame] | 288 | if (hw_read(ci, OP_USBMODE, USBMODE_CM) != mode) { |
| 289 | pr_err("cannot enter in %s mode", ci_role(ci)->name); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 290 | pr_err("lpm = %i", ci->hw_bank.lpm); |
| 291 | return -ENODEV; |
| 292 | } |
| 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 297 | /** |
| 298 | * ci_otg_role - pick role based on ID pin state |
| 299 | * @ci: the controller |
| 300 | */ |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 301 | static enum ci_role ci_otg_role(struct ci_hdrc *ci) |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 302 | { |
| 303 | u32 sts = hw_read(ci, OP_OTGSC, ~0); |
| 304 | enum ci_role role = sts & OTGSC_ID |
| 305 | ? CI_ROLE_GADGET |
| 306 | : CI_ROLE_HOST; |
| 307 | |
| 308 | return role; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * ci_role_work - perform role changing based on ID pin |
| 313 | * @work: work struct |
| 314 | */ |
| 315 | static void ci_role_work(struct work_struct *work) |
| 316 | { |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 317 | struct ci_hdrc *ci = container_of(work, struct ci_hdrc, work); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 318 | enum ci_role role = ci_otg_role(ci); |
| 319 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 320 | if (role != ci->role) { |
| 321 | dev_dbg(ci->dev, "switching from %s to %s\n", |
| 322 | ci_role(ci)->name, ci->roles[role]->name); |
| 323 | |
| 324 | ci_role_stop(ci); |
| 325 | ci_role_start(ci, role); |
| 326 | } |
Alexander Shishkin | 0c3f3dc | 2013-06-11 13:41:48 +0300 | [diff] [blame] | 327 | |
| 328 | enable_irq(ci->irq); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 329 | } |
| 330 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 331 | static irqreturn_t ci_irq(int irq, void *data) |
| 332 | { |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 333 | struct ci_hdrc *ci = data; |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 334 | irqreturn_t ret = IRQ_NONE; |
Richard Zhao | b183c19 | 2012-09-12 14:58:11 +0300 | [diff] [blame] | 335 | u32 otgsc = 0; |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 336 | |
Richard Zhao | b183c19 | 2012-09-12 14:58:11 +0300 | [diff] [blame] | 337 | if (ci->is_otg) |
| 338 | otgsc = hw_read(ci, OP_OTGSC, ~0); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 339 | |
Richard Zhao | b183c19 | 2012-09-12 14:58:11 +0300 | [diff] [blame] | 340 | if (ci->role != CI_ROLE_END) |
| 341 | ret = ci_role(ci)->irq(ci); |
| 342 | |
| 343 | if (ci->is_otg && (otgsc & OTGSC_IDIS)) { |
| 344 | hw_write(ci, OP_OTGSC, OTGSC_IDIS, OTGSC_IDIS); |
| 345 | disable_irq_nosync(ci->irq); |
| 346 | queue_work(ci->wq, &ci->work); |
| 347 | ret = IRQ_HANDLED; |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 348 | } |
| 349 | |
Richard Zhao | b183c19 | 2012-09-12 14:58:11 +0300 | [diff] [blame] | 350 | return ret; |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 351 | } |
| 352 | |
Peter Chen | 1542d9c | 2013-08-14 12:44:03 +0300 | [diff] [blame] | 353 | static int ci_get_platdata(struct device *dev, |
| 354 | struct ci_hdrc_platform_data *platdata) |
| 355 | { |
| 356 | /* Get the vbus regulator */ |
| 357 | platdata->reg_vbus = devm_regulator_get(dev, "vbus"); |
| 358 | if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) { |
| 359 | return -EPROBE_DEFER; |
| 360 | } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) { |
| 361 | platdata->reg_vbus = NULL; /* no vbus regualator is needed */ |
| 362 | } else if (IS_ERR(platdata->reg_vbus)) { |
| 363 | dev_err(dev, "Getting regulator error: %ld\n", |
| 364 | PTR_ERR(platdata->reg_vbus)); |
| 365 | return PTR_ERR(platdata->reg_vbus); |
| 366 | } |
| 367 | |
| 368 | return 0; |
| 369 | } |
| 370 | |
Richard Zhao | fe6e125 | 2012-07-07 22:56:42 +0800 | [diff] [blame] | 371 | static DEFINE_IDA(ci_ida); |
| 372 | |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 373 | struct platform_device *ci_hdrc_add_device(struct device *dev, |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 374 | struct resource *res, int nres, |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 375 | struct ci_hdrc_platform_data *platdata) |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 376 | { |
| 377 | struct platform_device *pdev; |
Richard Zhao | fe6e125 | 2012-07-07 22:56:42 +0800 | [diff] [blame] | 378 | int id, ret; |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 379 | |
Peter Chen | 1542d9c | 2013-08-14 12:44:03 +0300 | [diff] [blame] | 380 | ret = ci_get_platdata(dev, platdata); |
| 381 | if (ret) |
| 382 | return ERR_PTR(ret); |
| 383 | |
Richard Zhao | fe6e125 | 2012-07-07 22:56:42 +0800 | [diff] [blame] | 384 | id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL); |
| 385 | if (id < 0) |
| 386 | return ERR_PTR(id); |
| 387 | |
| 388 | pdev = platform_device_alloc("ci_hdrc", id); |
| 389 | if (!pdev) { |
| 390 | ret = -ENOMEM; |
| 391 | goto put_id; |
| 392 | } |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 393 | |
| 394 | pdev->dev.parent = dev; |
| 395 | pdev->dev.dma_mask = dev->dma_mask; |
| 396 | pdev->dev.dma_parms = dev->dma_parms; |
| 397 | dma_set_coherent_mask(&pdev->dev, dev->coherent_dma_mask); |
| 398 | |
| 399 | ret = platform_device_add_resources(pdev, res, nres); |
| 400 | if (ret) |
| 401 | goto err; |
| 402 | |
| 403 | ret = platform_device_add_data(pdev, platdata, sizeof(*platdata)); |
| 404 | if (ret) |
| 405 | goto err; |
| 406 | |
| 407 | ret = platform_device_add(pdev); |
| 408 | if (ret) |
| 409 | goto err; |
| 410 | |
| 411 | return pdev; |
| 412 | |
| 413 | err: |
| 414 | platform_device_put(pdev); |
Richard Zhao | fe6e125 | 2012-07-07 22:56:42 +0800 | [diff] [blame] | 415 | put_id: |
| 416 | ida_simple_remove(&ci_ida, id); |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 417 | return ERR_PTR(ret); |
| 418 | } |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 419 | EXPORT_SYMBOL_GPL(ci_hdrc_add_device); |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 420 | |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 421 | void ci_hdrc_remove_device(struct platform_device *pdev) |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 422 | { |
Lothar Waßmann | 98c3553 | 2012-11-22 10:11:25 +0100 | [diff] [blame] | 423 | int id = pdev->id; |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 424 | platform_device_unregister(pdev); |
Lothar Waßmann | 98c3553 | 2012-11-22 10:11:25 +0100 | [diff] [blame] | 425 | ida_simple_remove(&ci_ida, id); |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 426 | } |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 427 | EXPORT_SYMBOL_GPL(ci_hdrc_remove_device); |
Richard Zhao | cbc6dc2 | 2012-07-07 22:56:41 +0800 | [diff] [blame] | 428 | |
Peter Chen | 3f124d2 | 2013-08-14 12:44:07 +0300 | [diff] [blame] | 429 | static inline void ci_role_destroy(struct ci_hdrc *ci) |
| 430 | { |
| 431 | ci_hdrc_gadget_destroy(ci); |
| 432 | ci_hdrc_host_destroy(ci); |
| 433 | } |
| 434 | |
Peter Chen | 577b232 | 2013-08-14 12:44:08 +0300 | [diff] [blame] | 435 | static void ci_get_otg_capable(struct ci_hdrc *ci) |
| 436 | { |
| 437 | if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG) |
| 438 | ci->is_otg = false; |
| 439 | else |
| 440 | ci->is_otg = (hw_read(ci, CAP_DCCPARAMS, |
| 441 | DCCPARAMS_DC | DCCPARAMS_HC) |
| 442 | == (DCCPARAMS_DC | DCCPARAMS_HC)); |
Peter Chen | c344b51 | 2013-08-14 12:44:09 +0300 | [diff] [blame^] | 443 | if (ci->is_otg) { |
Peter Chen | 577b232 | 2013-08-14 12:44:08 +0300 | [diff] [blame] | 444 | dev_dbg(ci->dev, "It is OTG capable controller\n"); |
Peter Chen | c344b51 | 2013-08-14 12:44:09 +0300 | [diff] [blame^] | 445 | ci_disable_otg_interrupt(ci, OTGSC_INT_EN_BITS); |
| 446 | ci_clear_otg_interrupt(ci, OTGSC_INT_STATUS_BITS); |
| 447 | } |
Peter Chen | 577b232 | 2013-08-14 12:44:08 +0300 | [diff] [blame] | 448 | } |
| 449 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 450 | static int ci_hdrc_probe(struct platform_device *pdev) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 451 | { |
| 452 | struct device *dev = &pdev->dev; |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 453 | struct ci_hdrc *ci; |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 454 | struct resource *res; |
| 455 | void __iomem *base; |
| 456 | int ret; |
Sascha Hauer | 691962d | 2013-06-13 17:59:57 +0300 | [diff] [blame] | 457 | enum usb_dr_mode dr_mode; |
Lothar Waßmann | e98b44e | 2013-08-14 12:44:01 +0300 | [diff] [blame] | 458 | struct device_node *of_node = dev->of_node ?: dev->parent->of_node; |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 459 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 460 | if (!dev->platform_data) { |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 461 | dev_err(dev, "platform data missing\n"); |
| 462 | return -ENODEV; |
| 463 | } |
| 464 | |
| 465 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Felipe Balbi | 1929081 | 2013-03-30 02:46:27 +0200 | [diff] [blame] | 466 | base = devm_ioremap_resource(dev, res); |
| 467 | if (IS_ERR(base)) |
| 468 | return PTR_ERR(base); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 469 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 470 | ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL); |
| 471 | if (!ci) { |
| 472 | dev_err(dev, "can't allocate device\n"); |
| 473 | return -ENOMEM; |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 474 | } |
| 475 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 476 | ci->dev = dev; |
Richard Zhao | 77c4400 | 2012-06-29 17:48:53 +0800 | [diff] [blame] | 477 | ci->platdata = dev->platform_data; |
Richard Zhao | a2c3d69 | 2012-07-07 22:56:46 +0800 | [diff] [blame] | 478 | if (ci->platdata->phy) |
| 479 | ci->transceiver = ci->platdata->phy; |
| 480 | else |
| 481 | ci->global_phy = true; |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 482 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 483 | ret = hw_device_init(ci, base); |
| 484 | if (ret < 0) { |
| 485 | dev_err(dev, "can't initialize hardware\n"); |
| 486 | return -ENODEV; |
| 487 | } |
| 488 | |
Alexander Shishkin | eb70e5a | 2012-05-11 17:25:54 +0300 | [diff] [blame] | 489 | ci->hw_bank.phys = res->start; |
| 490 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 491 | ci->irq = platform_get_irq(pdev, 0); |
| 492 | if (ci->irq < 0) { |
| 493 | dev_err(dev, "missing IRQ\n"); |
| 494 | return -ENODEV; |
| 495 | } |
| 496 | |
| 497 | INIT_WORK(&ci->work, ci_role_work); |
| 498 | ci->wq = create_singlethread_workqueue("ci_otg"); |
| 499 | if (!ci->wq) { |
| 500 | dev_err(dev, "can't create workqueue\n"); |
| 501 | return -ENODEV; |
| 502 | } |
| 503 | |
Peter Chen | 577b232 | 2013-08-14 12:44:08 +0300 | [diff] [blame] | 504 | ci_get_otg_capable(ci); |
| 505 | |
Michael Grzeschik | 40dcd0e | 2013-06-13 17:59:56 +0300 | [diff] [blame] | 506 | if (!ci->platdata->phy_mode) |
Lothar Waßmann | e98b44e | 2013-08-14 12:44:01 +0300 | [diff] [blame] | 507 | ci->platdata->phy_mode = of_usb_get_phy_mode(of_node); |
Michael Grzeschik | 40dcd0e | 2013-06-13 17:59:56 +0300 | [diff] [blame] | 508 | |
Fabio Estevam | 03779f0 | 2013-08-14 12:43:56 +0300 | [diff] [blame] | 509 | hw_phymode_configure(ci); |
| 510 | |
Sascha Hauer | 691962d | 2013-06-13 17:59:57 +0300 | [diff] [blame] | 511 | if (!ci->platdata->dr_mode) |
Lothar Waßmann | e98b44e | 2013-08-14 12:44:01 +0300 | [diff] [blame] | 512 | ci->platdata->dr_mode = of_usb_get_dr_mode(of_node); |
Alexander Shishkin | eb70e5a | 2012-05-11 17:25:54 +0300 | [diff] [blame] | 513 | |
Sascha Hauer | 691962d | 2013-06-13 17:59:57 +0300 | [diff] [blame] | 514 | if (ci->platdata->dr_mode == USB_DR_MODE_UNKNOWN) |
| 515 | ci->platdata->dr_mode = USB_DR_MODE_OTG; |
| 516 | |
| 517 | dr_mode = ci->platdata->dr_mode; |
| 518 | /* initialize role(s) before the interrupt is requested */ |
| 519 | if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { |
| 520 | ret = ci_hdrc_host_init(ci); |
| 521 | if (ret) |
| 522 | dev_info(dev, "doesn't support host\n"); |
| 523 | } |
| 524 | |
| 525 | if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { |
| 526 | ret = ci_hdrc_gadget_init(ci); |
| 527 | if (ret) |
| 528 | dev_info(dev, "doesn't support gadget\n"); |
| 529 | } |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 530 | |
| 531 | if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) { |
| 532 | dev_err(dev, "no supported roles\n"); |
| 533 | ret = -ENODEV; |
| 534 | goto rm_wq; |
| 535 | } |
| 536 | |
| 537 | if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) { |
Peter Chen | 577b232 | 2013-08-14 12:44:08 +0300 | [diff] [blame] | 538 | if (ci->is_otg) { |
| 539 | /* |
| 540 | * ID pin needs 1ms debouce time, |
| 541 | * we delay 2ms for safe. |
| 542 | */ |
| 543 | mdelay(2); |
| 544 | ci->role = ci_otg_role(ci); |
| 545 | ci_hdrc_otg_init(ci); |
| 546 | } else { |
| 547 | /* |
| 548 | * If the controller is not OTG capable, but support |
| 549 | * role switch, the defalt role is gadget, and the |
| 550 | * user can switch it through debugfs. |
| 551 | */ |
| 552 | ci->role = CI_ROLE_GADGET; |
| 553 | } |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 554 | } else { |
| 555 | ci->role = ci->roles[CI_ROLE_HOST] |
| 556 | ? CI_ROLE_HOST |
| 557 | : CI_ROLE_GADGET; |
| 558 | } |
| 559 | |
| 560 | ret = ci_role_start(ci, ci->role); |
| 561 | if (ret) { |
| 562 | dev_err(dev, "can't start %s role\n", ci_role(ci)->name); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 563 | goto rm_wq; |
| 564 | } |
| 565 | |
| 566 | platform_set_drvdata(pdev, ci); |
Richard Zhao | 77c4400 | 2012-06-29 17:48:53 +0800 | [diff] [blame] | 567 | ret = request_irq(ci->irq, ci_irq, IRQF_SHARED, ci->platdata->name, |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 568 | ci); |
| 569 | if (ret) |
| 570 | goto stop; |
| 571 | |
Alexander Shishkin | adf0f73 | 2013-03-30 12:53:53 +0200 | [diff] [blame] | 572 | ret = dbg_create_files(ci); |
| 573 | if (!ret) |
| 574 | return 0; |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 575 | |
Alexander Shishkin | adf0f73 | 2013-03-30 12:53:53 +0200 | [diff] [blame] | 576 | free_irq(ci->irq, ci); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 577 | stop: |
Peter Chen | 3f124d2 | 2013-08-14 12:44:07 +0300 | [diff] [blame] | 578 | ci_role_destroy(ci); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 579 | rm_wq: |
| 580 | flush_workqueue(ci->wq); |
| 581 | destroy_workqueue(ci->wq); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 582 | |
| 583 | return ret; |
| 584 | } |
| 585 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 586 | static int ci_hdrc_remove(struct platform_device *pdev) |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 587 | { |
Alexander Shishkin | 8e22978 | 2013-06-24 14:46:36 +0300 | [diff] [blame] | 588 | struct ci_hdrc *ci = platform_get_drvdata(pdev); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 589 | |
Alexander Shishkin | adf0f73 | 2013-03-30 12:53:53 +0200 | [diff] [blame] | 590 | dbg_remove_files(ci); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 591 | flush_workqueue(ci->wq); |
| 592 | destroy_workqueue(ci->wq); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 593 | free_irq(ci->irq, ci); |
Peter Chen | 3f124d2 | 2013-08-14 12:44:07 +0300 | [diff] [blame] | 594 | ci_role_destroy(ci); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 595 | |
| 596 | return 0; |
| 597 | } |
| 598 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 599 | static struct platform_driver ci_hdrc_driver = { |
| 600 | .probe = ci_hdrc_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 601 | .remove = ci_hdrc_remove, |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 602 | .driver = { |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 603 | .name = "ci_hdrc", |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 604 | }, |
| 605 | }; |
| 606 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 607 | module_platform_driver(ci_hdrc_driver); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 608 | |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 609 | MODULE_ALIAS("platform:ci_hdrc"); |
Alexander Shishkin | e443b33 | 2012-05-11 17:25:46 +0300 | [diff] [blame] | 610 | MODULE_LICENSE("GPL v2"); |
| 611 | MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>"); |
Alexander Shishkin | 5f36e23 | 2012-05-11 17:25:47 +0300 | [diff] [blame] | 612 | MODULE_DESCRIPTION("ChipIdea HDRC Driver"); |