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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 | /* * arch/ppc/kernel/feature.c * * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * BenH: Changed implementation to work on multiple registers * polarity is also taken into account. Removed delay (now * responsibility of the caller). Added spinlocks. * */ #include <linux/types.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/spinlock.h> #include <asm/errno.h> #include <asm/ohare.h> #include <asm/heathrow.h> #include <asm/io.h> #include <asm/prom.h> #include <asm/feature.h> #undef DEBUG_FEATURE #define MAX_FEATURE_CONTROLLERS 2 #define MAX_FEATURE_OFFSET 0x50 #define FREG(c,r) (&(((c)->reg)[(r)>>2])) typedef struct feature_bit { int reg; /* reg. offset from mac-io base */ unsigned int polarity; /* 0 = normal, 1 = inverse */ unsigned int mask; /* bit mask */ } fbit; /* I don't have an OHare machine to test with, so I left those as they * were. Someone with such a machine chould check out what OF says and * try too see if they match the heathrow ones and should be changed too */ static fbit feature_bits_ohare_pbook[] = { {0x38,0,0}, /* FEATURE_null */ {0x38,0,OH_SCC_RESET}, /* FEATURE_Serial_reset */ {0x38,0,OH_SCC_ENABLE}, /* FEATURE_Serial_enable */ {0x38,0,OH_SCCA_IO}, /* FEATURE_Serial_IO_A */ {0x38,0,OH_SCCB_IO}, /* FEATURE_Serial_IO_B */ {0x38,0,OH_FLOPPY_ENABLE}, /* FEATURE_SWIM3_enable */ {0x38,0,OH_MESH_ENABLE}, /* FEATURE_MESH_enable */ {0x38,0,OH_IDE0_ENABLE}, /* FEATURE_IDE0_enable */ {0x38,1,OH_IDE0_RESET_N}, /* FEATURE_IDE0_reset */ {0x38,0,OH_IOBUS_ENABLE}, /* FEATURE_IOBUS_enable */ {0x38,1,OH_BAY_RESET_N}, /* FEATURE_Mediabay_reset */ {0x38,1,OH_BAY_POWER_N}, /* FEATURE_Mediabay_power */ {0x38,0,OH_BAY_PCI_ENABLE}, /* FEATURE_Mediabay_PCI_enable */ {0x38,0,OH_BAY_IDE_ENABLE}, /* FEATURE_IDE1_enable */ {0x38,1,OH_IDE1_RESET_N}, /* FEATURE_IDE1_reset */ {0x38,0,OH_BAY_FLOPPY_ENABLE}, /* FEATURE_Mediabay_floppy_enable */ {0x38,0,0}, /* FEATURE_BMac_reset */ {0x38,0,0}, /* FEATURE_BMac_IO_enable */ {0x38,0,0}, /* FEATURE_Modem_power */ {0x38,0,0}, /* FEATURE_Slow_SCC_PCLK */ {0x38,0,0}, /* FEATURE_Sound_Power */ {0x38,0,0}, /* FEATURE_Sound_CLK_Enable */ {0x38,0,0}, /* FEATURE_IDE2_enable */ {0x38,0,0}, /* FEATURE_IDE2_reset */ {0x38,0,0}, /* FEATURE_Mediabay_IDE_switch */ {0x38,0,0}, /* FEATURE_Mediabay_content */ }; /* Those bits are from a PowerBook. It's possible that desktop machines * based on heathrow need a different definition or some bits removed */ static fbit feature_bits_heathrow[] = { {0x38,0,0}, /* FEATURE_null */ {0x38,0,HRW_RESET_SCC}, /* FEATURE_Serial_reset */ {0x38,0,HRW_SCC_ENABLE}, /* FEATURE_Serial_enable */ {0x38,0,HRW_SCCA_IO}, /* FEATURE_Serial_IO_A */ {0x38,0,HRW_SCCB_IO}, /* FEATURE_Serial_IO_B */ {0x38,0,HRW_SWIM_ENABLE}, /* FEATURE_SWIM3_enable */ {0x38,0,HRW_MESH_ENABLE}, /* FEATURE_MESH_enable */ {0x38,0,HRW_IDE0_ENABLE}, /* FEATURE_IDE0_enable */ {0x38,1,HRW_IDE0_RESET_N}, /* FEATURE_IDE0_reset */ {0x38,0,HRW_IOBUS_ENABLE}, /* FEATURE_IOBUS_enable */ {0x38,1,HRW_BAY_RESET_N}, /* FEATURE_Mediabay_reset */ {0x38,1,HRW_BAY_POWER_N}, /* FEATURE_Mediabay_power */ {0x38,0,HRW_BAY_PCI_ENABLE}, /* FEATURE_Mediabay_PCI_enable */ {0x38,0,HRW_BAY_IDE_ENABLE}, /* FEATURE_IDE1_enable */ {0x38,1,HRW_IDE1_RESET_N}, /* FEATURE_IDE1_reset */ {0x38,0,HRW_BAY_FLOPPY_ENABLE}, /* FEATURE_Mediabay_floppy_enable */ {0x38,0,HRW_BMAC_RESET}, /* FEATURE_BMac_reset */ {0x38,0,HRW_BMAC_IO_ENABLE}, /* FEATURE_BMac_IO_enable */ {0x38,1,HRW_MODEM_POWER_N}, /* FEATURE_Modem_power */ {0x38,0,HRW_SLOW_SCC_PCLK}, /* FEATURE_Slow_SCC_PCLK */ {0x38,1,HRW_SOUND_POWER_N}, /* FEATURE_Sound_Power */ {0x38,0,HRW_SOUND_CLK_ENABLE}, /* FEATURE_Sound_CLK_Enable */ {0x38,0,0}, /* FEATURE_IDE2_enable */ {0x38,0,0}, /* FEATURE_IDE2_reset */ {0x38,0,0}, /* FEATURE_Mediabay_IDE_switch */ {0x38,0,0}, /* FEATURE_Mediabay_content */ }; /* * Those bits are from a 1999 G3 PowerBook, with a paddington chip. * Mostly the same as the heathrow. */ static fbit feature_bits_paddington[] = { {0x38,0,0}, /* FEATURE_null */ {0x38,0,0}, /* FEATURE_Serial_reset */ {0x38,0,HRW_SCC_ENABLE}, /* FEATURE_Serial_enable */ {0x38,0,HRW_SCCA_IO}, /* FEATURE_Serial_IO_A */ {0x38,0,HRW_SCCB_IO}, /* FEATURE_Serial_IO_B */ {0x38,0,HRW_SWIM_ENABLE}, /* FEATURE_SWIM3_enable */ {0x38,0,HRW_MESH_ENABLE}, /* FEATURE_MESH_enable */ {0x38,0,HRW_IDE0_ENABLE}, /* FEATURE_IDE0_enable */ {0x38,1,HRW_IDE0_RESET_N}, /* FEATURE_IDE0_reset */ {0x38,0,HRW_IOBUS_ENABLE}, /* FEATURE_IOBUS_enable */ {0x38,1,HRW_BAY_RESET_N}, /* FEATURE_Mediabay_reset */ {0x38,1,HRW_BAY_POWER_N}, /* FEATURE_Mediabay_power */ {0x38,0,HRW_BAY_PCI_ENABLE}, /* FEATURE_Mediabay_PCI_enable */ {0x38,0,HRW_BAY_IDE_ENABLE}, /* FEATURE_IDE1_enable */ {0x38,1,HRW_IDE1_RESET_N}, /* FEATURE_IDE1_reset */ {0x38,0,HRW_BAY_FLOPPY_ENABLE}, /* FEATURE_Mediabay_floppy_enable */ {0x38,0,HRW_BMAC_RESET}, /* FEATURE_BMac_reset */ {0x38,0,HRW_BMAC_IO_ENABLE}, /* FEATURE_BMac_IO_enable */ {0x38,1,PADD_MODEM_POWER_N}, /* FEATURE_Modem_power */ {0x38,0,HRW_SLOW_SCC_PCLK}, /* FEATURE_Slow_SCC_PCLK */ {0x38,1,HRW_SOUND_POWER_N}, /* FEATURE_Sound_Power */ {0x38,0,HRW_SOUND_CLK_ENABLE}, /* FEATURE_Sound_CLK_Enable */ {0x38,0,0}, /* FEATURE_IDE2_enable */ {0x38,0,0}, /* FEATURE_IDE2_reset */ {0x38,0,0}, /* FEATURE_Mediabay_IDE_switch */ {0x38,0,0}, /* FEATURE_Mediabay_content */ }; /* Those bits are for Core99 machines (iBook,G4,iMacSL/DV,Pismo,...). */ static fbit feature_bits_keylargo[] = { {0x38,0,0}, /* FEATURE_null */ {0x38,0,0}, /* FEATURE_Serial_reset */ {0x38,0,0x00000054}, /* FEATURE_Serial_enable */ {0x38,0,0}, /* FEATURE_Serial_IO_A */ {0x38,0,0}, /* FEATURE_Serial_IO_B */ {0x38,0,0}, /* FEATURE_SWIM3_enable */ {0x38,0,0}, /* FEATURE_MESH_enable */ {0x3c,0,0}, /* FEATURE_IDE0_enable */ {0x3c,1,0x01000000}, /* FEATURE_IDE0_reset */ {0x38,0,0}, /* FEATURE_IOBUS_enable */ {0x34,1,0x00000200}, /* FEATURE_Mediabay_reset */ {0x34,1,0x00000400}, /* FEATURE_Mediabay_power */ {0x38,0,0}, /* FEATURE_Mediabay_PCI_enable */ {0x3c,0,0x0}, /* FEATURE_IDE1_enable */ {0x3c,1,0x08000000}, /* FEATURE_IDE1_reset */ {0x38,0,0}, /* FEATURE_Mediabay_floppy_enable */ {0x38,0,0}, /* FEATURE_BMac_reset */ {0x38,0,0}, /* FEATURE_BMac_IO_enable */ {0x40,1,0x02000000}, /* FEATURE_Modem_power */ {0x38,0,0}, /* FEATURE_Slow_SCC_PCLK */ {0x38,0,0}, /* FEATURE_Sound_Power */ {0x38,0,0}, /* FEATURE_Sound_CLK_Enable */ {0x38,0,0}, /* FEATURE_IDE2_enable */ {0x3c,1,0x40000000}, /* FEATURE_IDE2_reset */ {0x34,0,0x00001000}, /* FEATURE_Mediabay_IDE_switch */ {0x34,0,0x00000100}, /* FEATURE_Mediabay_content */ }; /* definition of a feature controller object */ struct feature_controller { fbit* bits; volatile u32* reg; struct device_node* device; spinlock_t lock; }; /* static functions */ static void feature_add_controller(struct device_node *controller_device, fbit* bits); static struct feature_controller* feature_lookup_controller(struct device_node *device); /* static varialbles */ static struct feature_controller controllers[MAX_FEATURE_CONTROLLERS]; static int controller_count = 0; void feature_init(void) { struct device_node *np; np = find_devices("mac-io"); while (np != NULL) { /* KeyLargo contains several (5 ?) FCR registers in mac-io, * plus some gpio's which could eventually be handled here. */ if (device_is_compatible(np, "Keylargo")) { feature_add_controller(np, feature_bits_keylargo); } else if (device_is_compatible(np, "paddington")) { feature_add_controller(np, feature_bits_paddington); } else { feature_add_controller(np, feature_bits_heathrow); } np = np->next; } if (controller_count == 0) { np = find_devices("ohare"); if (np) { if (find_devices("via-pmu") != NULL) feature_add_controller(np, feature_bits_ohare_pbook); else /* else not sure; maybe this is a Starmax? */ feature_add_controller(np, NULL); } } if (controller_count) printk(KERN_INFO "Registered %d feature controller(s)\n", controller_count); #ifdef CONFIG_PMAC_PBOOK #ifdef CONFIG_DMASOUND_MODULE /* On PowerBooks, we disable the sound chip when dmasound is a module */ if (controller_count && find_devices("via-pmu") != NULL) { feature_clear(controllers[0].device, FEATURE_Sound_power); feature_clear(controllers[0].device, FEATURE_Sound_CLK_enable); } #endif #endif } static void feature_add_controller(struct device_node *controller_device, fbit* bits) { struct feature_controller* controller; if (controller_count >= MAX_FEATURE_CONTROLLERS) { printk(KERN_INFO "Feature controller %s skipped(MAX:%d)\n", controller_device->full_name, MAX_FEATURE_CONTROLLERS); return; } controller = &controllers[controller_count]; controller->bits = bits; controller->device = controller_device; if (controller_device->n_addrs == 0) { printk(KERN_ERR "No addresses for %s\n", controller_device->full_name); return; } controller->reg = (volatile u32 *)ioremap( controller_device->addrs[0].address, MAX_FEATURE_OFFSET); if (bits == NULL) { printk(KERN_INFO "Twiddling the magic ohare bits\n"); out_le32(FREG(controller,OHARE_FEATURE_REG), STARMAX_FEATURES); return; } spin_lock_init(&controller->lock); controller_count++; } static struct feature_controller* feature_lookup_controller(struct device_node *device) { int i; if (device == NULL) return NULL; while(device) { for (i=0; i<controller_count; i++) if (device == controllers[i].device) return &controllers[i]; device = device->parent; } #ifdef DEBUG_FEATURE printk("feature: <%s> not found on any controller\n", device->name); #endif return NULL; } int feature_set(struct device_node* device, enum system_feature f) { struct feature_controller* controller; unsigned long flags; unsigned long value; fbit* bit; if (f >= FEATURE_last) return -EINVAL; controller = feature_lookup_controller(device); if (!controller) return -ENODEV; bit = &controller->bits[f]; if (!bit->mask) return -EINVAL; #ifdef DEBUG_FEATURE printk("feature: <%s> setting feature %d in controller @0x%x\n", device->name, (int)f, (unsigned int)controller->reg); #endif spin_lock_irqsave(&controller->lock, flags); value = in_le32(FREG(controller, bit->reg)); value = bit->polarity ? (value & ~bit->mask) : (value | bit->mask); out_le32(FREG(controller, bit->reg), value); (void)in_le32(FREG(controller, bit->reg)); spin_unlock_irqrestore(&controller->lock, flags); return 0; } int feature_clear(struct device_node* device, enum system_feature f) { struct feature_controller* controller; unsigned long flags; unsigned long value; fbit* bit; if (f >= FEATURE_last) return -EINVAL; controller = feature_lookup_controller(device); if (!controller) return -ENODEV; bit = &controller->bits[f]; if (!bit->mask) return -EINVAL; #ifdef DEBUG_FEATURE printk("feature: <%s> clearing feature %d in controller @0x%x\n", device->name, (int)f, (unsigned int)controller->reg); #endif spin_lock_irqsave(&controller->lock, flags); value = in_le32(FREG(controller, bit->reg)); value = bit->polarity ? (value | bit->mask) : (value & ~bit->mask); out_le32(FREG(controller, bit->reg), value); (void)in_le32(FREG(controller, bit->reg)); spin_unlock_irqrestore(&controller->lock, flags); return 0; } int feature_test(struct device_node* device, enum system_feature f) { struct feature_controller* controller; unsigned long value; fbit* bit; if (f >= FEATURE_last) return -EINVAL; controller = feature_lookup_controller(device); if (!controller) return -ENODEV; bit = &controller->bits[f]; if (!bit->mask) return -EINVAL; #ifdef DEBUG_FEATURE printk("feature: <%s> clearing feature %d in controller @0x%x\n", device->name, (int)f, (unsigned int)controller->reg); #endif /* If one feature contains several bits, all of them must be set * for value to be true, or all of them must be 0 if polarity is * inverse */ value = (in_le32(FREG(controller, bit->reg)) & bit->mask); return bit->polarity ? (value == 0) : (value == bit->mask); } |