Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Renesas USB driver |
| 3 | * |
| 4 | * Copyright (C) 2011 Renesas Solutions Corp. |
| 5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License |
| 13 | * along with this program; if not, write to the Free Software |
| 14 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 15 | * |
| 16 | */ |
| 17 | #include <linux/interrupt.h> |
| 18 | |
| 19 | #include "./common.h" |
| 20 | #include "./mod.h" |
| 21 | |
| 22 | #define usbhs_priv_to_modinfo(priv) (&priv->mod_info) |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 23 | #define usbhs_mod_info_call(priv, func, param...) \ |
| 24 | ({ \ |
| 25 | struct usbhs_mod_info *info; \ |
| 26 | info = usbhs_priv_to_modinfo(priv); \ |
| 27 | !info->func ? 0 : \ |
| 28 | info->func(param); \ |
| 29 | }) |
| 30 | |
| 31 | /* |
| 32 | * autonomy |
| 33 | * |
| 34 | * these functions are used if platform doesn't have external phy. |
| 35 | * -> there is no "notify_hotplug" callback from platform |
| 36 | * -> call "notify_hotplug" by itself |
| 37 | * -> use own interrupt to connect/disconnect |
| 38 | * -> it mean module clock is always ON |
| 39 | * ~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 40 | */ |
| 41 | static int usbhsm_autonomy_get_vbus(struct platform_device *pdev) |
| 42 | { |
| 43 | struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); |
| 44 | |
| 45 | return VBSTS & usbhs_read(priv, INTSTS0); |
| 46 | } |
| 47 | |
| 48 | static int usbhsm_autonomy_irq_vbus(struct usbhs_priv *priv, |
| 49 | struct usbhs_irq_state *irq_state) |
| 50 | { |
| 51 | struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
| 52 | |
Kuninori Morimoto | b4fcea2 | 2011-10-24 02:25:48 -0700 | [diff] [blame] | 53 | renesas_usbhs_call_notify_hotplug(pdev); |
| 54 | |
| 55 | return 0; |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | void usbhs_mod_autonomy_mode(struct usbhs_priv *priv) |
| 59 | { |
| 60 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 61 | |
| 62 | info->irq_vbus = usbhsm_autonomy_irq_vbus; |
Kuninori Morimoto | 4829820 | 2011-10-12 21:02:22 -0700 | [diff] [blame] | 63 | priv->pfunc.get_vbus = usbhsm_autonomy_get_vbus; |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 64 | |
| 65 | usbhs_irq_callback_update(priv, NULL); |
| 66 | } |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 67 | |
| 68 | /* |
| 69 | * host / gadget functions |
| 70 | * |
| 71 | * renesas_usbhs host/gadget can register itself by below functions. |
| 72 | * these functions are called when probe |
| 73 | * |
| 74 | */ |
| 75 | void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id) |
| 76 | { |
| 77 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 78 | |
| 79 | info->mod[id] = mod; |
| 80 | mod->priv = priv; |
| 81 | } |
| 82 | |
| 83 | struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id) |
| 84 | { |
| 85 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 86 | struct usbhs_mod *ret = NULL; |
| 87 | |
| 88 | switch (id) { |
| 89 | case USBHS_HOST: |
| 90 | case USBHS_GADGET: |
| 91 | ret = info->mod[id]; |
| 92 | break; |
| 93 | } |
| 94 | |
| 95 | return ret; |
| 96 | } |
| 97 | |
Kuninori Morimoto | 0deb3e7 | 2011-10-10 22:02:45 -0700 | [diff] [blame] | 98 | int usbhs_mod_is_host(struct usbhs_priv *priv) |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 99 | { |
Kuninori Morimoto | 0deb3e7 | 2011-10-10 22:02:45 -0700 | [diff] [blame] | 100 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 101 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 102 | |
| 103 | if (!mod) |
| 104 | return -EINVAL; |
| 105 | |
| 106 | return info->mod[USBHS_HOST] == mod; |
| 107 | } |
| 108 | |
| 109 | struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv) |
| 110 | { |
| 111 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 112 | |
| 113 | return info->curt; |
| 114 | } |
| 115 | |
| 116 | int usbhs_mod_change(struct usbhs_priv *priv, int id) |
| 117 | { |
| 118 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 119 | struct usbhs_mod *mod = NULL; |
| 120 | int ret = 0; |
| 121 | |
| 122 | /* id < 0 mean no current */ |
| 123 | switch (id) { |
| 124 | case USBHS_HOST: |
| 125 | case USBHS_GADGET: |
| 126 | mod = info->mod[id]; |
| 127 | break; |
| 128 | default: |
| 129 | ret = -EINVAL; |
| 130 | } |
| 131 | info->curt = mod; |
| 132 | |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | static irqreturn_t usbhs_interrupt(int irq, void *data); |
| 137 | int usbhs_mod_probe(struct usbhs_priv *priv) |
| 138 | { |
| 139 | struct device *dev = usbhs_priv_to_dev(priv); |
| 140 | int ret; |
| 141 | |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 142 | /* |
| 143 | * install host/gadget driver |
| 144 | */ |
Kuninori Morimoto | 034d7c1 | 2011-10-10 22:07:40 -0700 | [diff] [blame] | 145 | ret = usbhs_mod_host_probe(priv); |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 146 | if (ret < 0) |
| 147 | return ret; |
| 148 | |
Kuninori Morimoto | 034d7c1 | 2011-10-10 22:07:40 -0700 | [diff] [blame] | 149 | ret = usbhs_mod_gadget_probe(priv); |
| 150 | if (ret < 0) |
| 151 | goto mod_init_host_err; |
| 152 | |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 153 | /* irq settings */ |
| 154 | ret = request_irq(priv->irq, usbhs_interrupt, |
Yong Zhang | b5dd18d | 2011-09-07 16:10:52 +0800 | [diff] [blame] | 155 | 0, dev_name(dev), priv); |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 156 | if (ret) { |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 157 | dev_err(dev, "irq request err\n"); |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 158 | goto mod_init_gadget_err; |
| 159 | } |
| 160 | |
| 161 | return ret; |
| 162 | |
| 163 | mod_init_gadget_err: |
| 164 | usbhs_mod_gadget_remove(priv); |
Kuninori Morimoto | 034d7c1 | 2011-10-10 22:07:40 -0700 | [diff] [blame] | 165 | mod_init_host_err: |
| 166 | usbhs_mod_host_remove(priv); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 167 | |
| 168 | return ret; |
| 169 | } |
| 170 | |
| 171 | void usbhs_mod_remove(struct usbhs_priv *priv) |
| 172 | { |
Kuninori Morimoto | 034d7c1 | 2011-10-10 22:07:40 -0700 | [diff] [blame] | 173 | usbhs_mod_host_remove(priv); |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 174 | usbhs_mod_gadget_remove(priv); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 175 | free_irq(priv->irq, priv); |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * status functions |
| 180 | */ |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 181 | int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state) |
| 182 | { |
| 183 | int state = irq_state->intsts0 & DVSQ_MASK; |
| 184 | |
| 185 | switch (state) { |
| 186 | case POWER_STATE: |
| 187 | case DEFAULT_STATE: |
| 188 | case ADDRESS_STATE: |
| 189 | case CONFIGURATION_STATE: |
| 190 | return state; |
| 191 | } |
| 192 | |
| 193 | return -EIO; |
| 194 | } |
| 195 | |
| 196 | int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state) |
| 197 | { |
| 198 | /* |
| 199 | * return value |
| 200 | * |
| 201 | * IDLE_SETUP_STAGE |
| 202 | * READ_DATA_STAGE |
| 203 | * READ_STATUS_STAGE |
| 204 | * WRITE_DATA_STAGE |
| 205 | * WRITE_STATUS_STAGE |
| 206 | * NODATA_STATUS_STAGE |
| 207 | * SEQUENCE_ERROR |
| 208 | */ |
| 209 | return (int)irq_state->intsts0 & CTSQ_MASK; |
| 210 | } |
| 211 | |
| 212 | static void usbhs_status_get_each_irq(struct usbhs_priv *priv, |
| 213 | struct usbhs_irq_state *state) |
| 214 | { |
| 215 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
| 216 | |
| 217 | state->intsts0 = usbhs_read(priv, INTSTS0); |
| 218 | state->intsts1 = usbhs_read(priv, INTSTS1); |
| 219 | |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 220 | /* mask */ |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 221 | if (mod) { |
| 222 | state->brdysts = usbhs_read(priv, BRDYSTS); |
| 223 | state->nrdysts = usbhs_read(priv, NRDYSTS); |
| 224 | state->bempsts = usbhs_read(priv, BEMPSTS); |
| 225 | |
| 226 | state->bempsts &= mod->irq_bempsts; |
| 227 | state->brdysts &= mod->irq_brdysts; |
| 228 | } |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | /* |
| 232 | * interrupt |
| 233 | */ |
| 234 | #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */ |
| 235 | #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */ |
| 236 | static irqreturn_t usbhs_interrupt(int irq, void *data) |
| 237 | { |
| 238 | struct usbhs_priv *priv = data; |
| 239 | struct usbhs_irq_state irq_state; |
| 240 | |
| 241 | usbhs_status_get_each_irq(priv, &irq_state); |
| 242 | |
| 243 | /* |
| 244 | * clear interrupt |
| 245 | * |
| 246 | * The hardware is _very_ picky to clear interrupt bit. |
| 247 | * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value. |
| 248 | * |
| 249 | * see |
| 250 | * "Operation" |
| 251 | * - "Control Transfer (DCP)" |
| 252 | * - Function :: VALID bit should 0 |
| 253 | */ |
| 254 | usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC); |
| 255 | usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC); |
| 256 | |
| 257 | usbhs_write(priv, BRDYSTS, 0); |
| 258 | usbhs_write(priv, NRDYSTS, 0); |
| 259 | usbhs_write(priv, BEMPSTS, 0); |
| 260 | |
| 261 | /* |
| 262 | * call irq callback functions |
| 263 | * see also |
| 264 | * usbhs_irq_setting_update |
| 265 | */ |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 266 | |
| 267 | /* INTSTS0 */ |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 268 | if (irq_state.intsts0 & VBINT) |
| 269 | usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state); |
| 270 | |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 271 | if (irq_state.intsts0 & DVST) |
| 272 | usbhs_mod_call(priv, irq_dev_state, priv, &irq_state); |
| 273 | |
| 274 | if (irq_state.intsts0 & CTRT) |
| 275 | usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state); |
| 276 | |
| 277 | if (irq_state.intsts0 & BEMP) |
| 278 | usbhs_mod_call(priv, irq_empty, priv, &irq_state); |
| 279 | |
| 280 | if (irq_state.intsts0 & BRDY) |
| 281 | usbhs_mod_call(priv, irq_ready, priv, &irq_state); |
| 282 | |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 283 | /* INTSTS1 */ |
| 284 | if (irq_state.intsts1 & ATTCH) |
| 285 | usbhs_mod_call(priv, irq_attch, priv, &irq_state); |
| 286 | |
| 287 | if (irq_state.intsts1 & DTCH) |
| 288 | usbhs_mod_call(priv, irq_dtch, priv, &irq_state); |
| 289 | |
| 290 | if (irq_state.intsts1 & SIGN) |
| 291 | usbhs_mod_call(priv, irq_sign, priv, &irq_state); |
| 292 | |
| 293 | if (irq_state.intsts1 & SACK) |
| 294 | usbhs_mod_call(priv, irq_sack, priv, &irq_state); |
| 295 | |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 296 | return IRQ_HANDLED; |
| 297 | } |
| 298 | |
| 299 | void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod) |
| 300 | { |
| 301 | u16 intenb0 = 0; |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 302 | u16 intenb1 = 0; |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 303 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 304 | |
Kuninori Morimoto | 651f5e4 | 2011-10-10 22:01:15 -0700 | [diff] [blame] | 305 | /* |
| 306 | * BEMPENB/BRDYENB are picky. |
| 307 | * below method is required |
| 308 | * |
| 309 | * - clear INTSTS0 |
| 310 | * - update BEMPENB/BRDYENB |
| 311 | * - update INTSTS0 |
| 312 | */ |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 313 | usbhs_write(priv, INTENB0, 0); |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 314 | usbhs_write(priv, INTENB1, 0); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 315 | |
| 316 | usbhs_write(priv, BEMPENB, 0); |
| 317 | usbhs_write(priv, BRDYENB, 0); |
| 318 | |
| 319 | /* |
| 320 | * see also |
| 321 | * usbhs_interrupt |
| 322 | */ |
| 323 | |
| 324 | /* |
| 325 | * it don't enable DVSE (intenb0) here |
| 326 | * but "mod->irq_dev_state" will be called. |
| 327 | */ |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 328 | if (info->irq_vbus) |
| 329 | intenb0 |= VBSE; |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 330 | |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 331 | if (mod) { |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 332 | /* |
| 333 | * INTSTS0 |
| 334 | */ |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 335 | if (mod->irq_ctrl_stage) |
| 336 | intenb0 |= CTRE; |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 337 | |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 338 | if (mod->irq_empty && mod->irq_bempsts) { |
| 339 | usbhs_write(priv, BEMPENB, mod->irq_bempsts); |
| 340 | intenb0 |= BEMPE; |
| 341 | } |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 342 | |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 343 | if (mod->irq_ready && mod->irq_brdysts) { |
| 344 | usbhs_write(priv, BRDYENB, mod->irq_brdysts); |
| 345 | intenb0 |= BRDYE; |
| 346 | } |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 347 | |
| 348 | /* |
| 349 | * INTSTS1 |
| 350 | */ |
| 351 | if (mod->irq_attch) |
| 352 | intenb1 |= ATTCHE; |
| 353 | |
Kuninori Morimoto | b95eb747 | 2011-12-08 18:23:56 -0800 | [diff] [blame] | 354 | if (mod->irq_dtch) |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 355 | intenb1 |= DTCHE; |
| 356 | |
| 357 | if (mod->irq_sign) |
| 358 | intenb1 |= SIGNE; |
| 359 | |
| 360 | if (mod->irq_sack) |
| 361 | intenb1 |= SACKE; |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 362 | } |
| 363 | |
Kuninori Morimoto | 651f5e4 | 2011-10-10 22:01:15 -0700 | [diff] [blame] | 364 | if (intenb0) |
| 365 | usbhs_write(priv, INTENB0, intenb0); |
Kuninori Morimoto | 89c1d2e | 2011-10-10 22:06:57 -0700 | [diff] [blame] | 366 | |
| 367 | if (intenb1) |
| 368 | usbhs_write(priv, INTENB1, intenb1); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 369 | } |