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 | |
| 53 | return usbhsc_drvcllbck_notify_hotplug(pdev); |
| 54 | } |
| 55 | |
| 56 | void usbhs_mod_autonomy_mode(struct usbhs_priv *priv) |
| 57 | { |
| 58 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 59 | |
| 60 | info->irq_vbus = usbhsm_autonomy_irq_vbus; |
| 61 | priv->pfunc->get_vbus = usbhsm_autonomy_get_vbus; |
| 62 | |
| 63 | usbhs_irq_callback_update(priv, NULL); |
| 64 | } |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 65 | |
| 66 | /* |
| 67 | * host / gadget functions |
| 68 | * |
| 69 | * renesas_usbhs host/gadget can register itself by below functions. |
| 70 | * these functions are called when probe |
| 71 | * |
| 72 | */ |
| 73 | void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id) |
| 74 | { |
| 75 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 76 | |
| 77 | info->mod[id] = mod; |
| 78 | mod->priv = priv; |
| 79 | } |
| 80 | |
| 81 | struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id) |
| 82 | { |
| 83 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 84 | struct usbhs_mod *ret = NULL; |
| 85 | |
| 86 | switch (id) { |
| 87 | case USBHS_HOST: |
| 88 | case USBHS_GADGET: |
| 89 | ret = info->mod[id]; |
| 90 | break; |
| 91 | } |
| 92 | |
| 93 | return ret; |
| 94 | } |
| 95 | |
| 96 | int usbhs_mod_is_host(struct usbhs_priv *priv, struct usbhs_mod *mod) |
| 97 | { |
| 98 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 99 | |
| 100 | if (!mod) |
| 101 | return -EINVAL; |
| 102 | |
| 103 | return info->mod[USBHS_HOST] == mod; |
| 104 | } |
| 105 | |
| 106 | struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv) |
| 107 | { |
| 108 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 109 | |
| 110 | return info->curt; |
| 111 | } |
| 112 | |
| 113 | int usbhs_mod_change(struct usbhs_priv *priv, int id) |
| 114 | { |
| 115 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
| 116 | struct usbhs_mod *mod = NULL; |
| 117 | int ret = 0; |
| 118 | |
| 119 | /* id < 0 mean no current */ |
| 120 | switch (id) { |
| 121 | case USBHS_HOST: |
| 122 | case USBHS_GADGET: |
| 123 | mod = info->mod[id]; |
| 124 | break; |
| 125 | default: |
| 126 | ret = -EINVAL; |
| 127 | } |
| 128 | info->curt = mod; |
| 129 | |
| 130 | return ret; |
| 131 | } |
| 132 | |
| 133 | static irqreturn_t usbhs_interrupt(int irq, void *data); |
| 134 | int usbhs_mod_probe(struct usbhs_priv *priv) |
| 135 | { |
| 136 | struct device *dev = usbhs_priv_to_dev(priv); |
| 137 | int ret; |
| 138 | |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 139 | /* |
| 140 | * install host/gadget driver |
| 141 | */ |
| 142 | ret = usbhs_mod_gadget_probe(priv); |
| 143 | if (ret < 0) |
| 144 | return ret; |
| 145 | |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 146 | /* irq settings */ |
| 147 | ret = request_irq(priv->irq, usbhs_interrupt, |
Yong Zhang | b5dd18d | 2011-09-07 16:10:52 +0800 | [diff] [blame] | 148 | 0, dev_name(dev), priv); |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 149 | if (ret) { |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 150 | dev_err(dev, "irq request err\n"); |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 151 | goto mod_init_gadget_err; |
| 152 | } |
| 153 | |
| 154 | return ret; |
| 155 | |
| 156 | mod_init_gadget_err: |
| 157 | usbhs_mod_gadget_remove(priv); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 158 | |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | void usbhs_mod_remove(struct usbhs_priv *priv) |
| 163 | { |
Kuninori Morimoto | 2f98382 | 2011-04-05 11:40:54 +0900 | [diff] [blame] | 164 | usbhs_mod_gadget_remove(priv); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 165 | free_irq(priv->irq, priv); |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * status functions |
| 170 | */ |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 171 | int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state) |
| 172 | { |
| 173 | int state = irq_state->intsts0 & DVSQ_MASK; |
| 174 | |
| 175 | switch (state) { |
| 176 | case POWER_STATE: |
| 177 | case DEFAULT_STATE: |
| 178 | case ADDRESS_STATE: |
| 179 | case CONFIGURATION_STATE: |
| 180 | return state; |
| 181 | } |
| 182 | |
| 183 | return -EIO; |
| 184 | } |
| 185 | |
| 186 | int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state) |
| 187 | { |
| 188 | /* |
| 189 | * return value |
| 190 | * |
| 191 | * IDLE_SETUP_STAGE |
| 192 | * READ_DATA_STAGE |
| 193 | * READ_STATUS_STAGE |
| 194 | * WRITE_DATA_STAGE |
| 195 | * WRITE_STATUS_STAGE |
| 196 | * NODATA_STATUS_STAGE |
| 197 | * SEQUENCE_ERROR |
| 198 | */ |
| 199 | return (int)irq_state->intsts0 & CTSQ_MASK; |
| 200 | } |
| 201 | |
| 202 | static void usbhs_status_get_each_irq(struct usbhs_priv *priv, |
| 203 | struct usbhs_irq_state *state) |
| 204 | { |
| 205 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
| 206 | |
| 207 | state->intsts0 = usbhs_read(priv, INTSTS0); |
| 208 | state->intsts1 = usbhs_read(priv, INTSTS1); |
| 209 | |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 210 | /* mask */ |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 211 | if (mod) { |
| 212 | state->brdysts = usbhs_read(priv, BRDYSTS); |
| 213 | state->nrdysts = usbhs_read(priv, NRDYSTS); |
| 214 | state->bempsts = usbhs_read(priv, BEMPSTS); |
| 215 | |
| 216 | state->bempsts &= mod->irq_bempsts; |
| 217 | state->brdysts &= mod->irq_brdysts; |
| 218 | } |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | /* |
| 222 | * interrupt |
| 223 | */ |
| 224 | #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */ |
| 225 | #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */ |
| 226 | static irqreturn_t usbhs_interrupt(int irq, void *data) |
| 227 | { |
| 228 | struct usbhs_priv *priv = data; |
| 229 | struct usbhs_irq_state irq_state; |
| 230 | |
| 231 | usbhs_status_get_each_irq(priv, &irq_state); |
| 232 | |
| 233 | /* |
| 234 | * clear interrupt |
| 235 | * |
| 236 | * The hardware is _very_ picky to clear interrupt bit. |
| 237 | * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value. |
| 238 | * |
| 239 | * see |
| 240 | * "Operation" |
| 241 | * - "Control Transfer (DCP)" |
| 242 | * - Function :: VALID bit should 0 |
| 243 | */ |
| 244 | usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC); |
| 245 | usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC); |
| 246 | |
| 247 | usbhs_write(priv, BRDYSTS, 0); |
| 248 | usbhs_write(priv, NRDYSTS, 0); |
| 249 | usbhs_write(priv, BEMPSTS, 0); |
| 250 | |
| 251 | /* |
| 252 | * call irq callback functions |
| 253 | * see also |
| 254 | * usbhs_irq_setting_update |
| 255 | */ |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 256 | if (irq_state.intsts0 & VBINT) |
| 257 | usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state); |
| 258 | |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 259 | if (irq_state.intsts0 & DVST) |
| 260 | usbhs_mod_call(priv, irq_dev_state, priv, &irq_state); |
| 261 | |
| 262 | if (irq_state.intsts0 & CTRT) |
| 263 | usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state); |
| 264 | |
| 265 | if (irq_state.intsts0 & BEMP) |
| 266 | usbhs_mod_call(priv, irq_empty, priv, &irq_state); |
| 267 | |
| 268 | if (irq_state.intsts0 & BRDY) |
| 269 | usbhs_mod_call(priv, irq_ready, priv, &irq_state); |
| 270 | |
| 271 | return IRQ_HANDLED; |
| 272 | } |
| 273 | |
| 274 | void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod) |
| 275 | { |
| 276 | u16 intenb0 = 0; |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 277 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 278 | |
Kuninori Morimoto | 651f5e4 | 2011-10-10 22:01:15 -0700 | [diff] [blame] | 279 | /* |
| 280 | * BEMPENB/BRDYENB are picky. |
| 281 | * below method is required |
| 282 | * |
| 283 | * - clear INTSTS0 |
| 284 | * - update BEMPENB/BRDYENB |
| 285 | * - update INTSTS0 |
| 286 | */ |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 287 | usbhs_write(priv, INTENB0, 0); |
| 288 | |
| 289 | usbhs_write(priv, BEMPENB, 0); |
| 290 | usbhs_write(priv, BRDYENB, 0); |
| 291 | |
| 292 | /* |
| 293 | * see also |
| 294 | * usbhs_interrupt |
| 295 | */ |
| 296 | |
| 297 | /* |
| 298 | * it don't enable DVSE (intenb0) here |
| 299 | * but "mod->irq_dev_state" will be called. |
| 300 | */ |
Kuninori Morimoto | b002ff6 | 2011-04-28 16:41:20 +0900 | [diff] [blame] | 301 | if (info->irq_vbus) |
| 302 | intenb0 |= VBSE; |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 303 | |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 304 | if (mod) { |
| 305 | if (mod->irq_ctrl_stage) |
| 306 | intenb0 |= CTRE; |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 307 | |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 308 | if (mod->irq_empty && mod->irq_bempsts) { |
| 309 | usbhs_write(priv, BEMPENB, mod->irq_bempsts); |
| 310 | intenb0 |= BEMPE; |
| 311 | } |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 312 | |
Kuninori Morimoto | 5ea68d5 | 2011-04-28 16:41:07 +0900 | [diff] [blame] | 313 | if (mod->irq_ready && mod->irq_brdysts) { |
| 314 | usbhs_write(priv, BRDYENB, mod->irq_brdysts); |
| 315 | intenb0 |= BRDYE; |
| 316 | } |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 317 | } |
| 318 | |
Kuninori Morimoto | 651f5e4 | 2011-10-10 22:01:15 -0700 | [diff] [blame] | 319 | if (intenb0) |
| 320 | usbhs_write(priv, INTENB0, intenb0); |
Kuninori Morimoto | f1407d5 | 2011-04-04 13:44:59 +0900 | [diff] [blame] | 321 | } |