1 /* 2 * Broadcom specific AMBA 3 * Broadcom MIPS32 74K core driver 4 * 5 * Copyright 2009, Broadcom Corporation 6 * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de> 7 * Copyright 2010, Bernhard Loos <bernhardloos@googlemail.com> 8 * Copyright 2011, Hauke Mehrtens <hauke@hauke-m.de> 9 * 10 * Licensed under the GNU/GPL. See COPYING for details. 11 */ 12 13 #include "bcma_private.h" 14 15 #include <linux/bcma/bcma.h> 16 17 #include <linux/serial.h> 18 #include <linux/serial_core.h> 19 #include <linux/serial_reg.h> 20 #include <linux/time.h> 21 #ifdef CONFIG_BCM47XX 22 #include <linux/bcm47xx_nvram.h> 23 #endif 24 25 enum bcma_boot_dev { 26 BCMA_BOOT_DEV_UNK = 0, 27 BCMA_BOOT_DEV_ROM, 28 BCMA_BOOT_DEV_PARALLEL, 29 BCMA_BOOT_DEV_SERIAL, 30 BCMA_BOOT_DEV_NAND, 31 }; 32 33 /* The 47162a0 hangs when reading MIPS DMP registers */ 34 static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev) 35 { 36 return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 && 37 dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K; 38 } 39 40 /* The 5357b0 hangs when reading USB20H DMP registers */ 41 static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device *dev) 42 { 43 return (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 || 44 dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) && 45 dev->bus->chipinfo.pkg == 11 && 46 dev->id.id == BCMA_CORE_USB20_HOST; 47 } 48 49 static inline u32 mips_read32(struct bcma_drv_mips *mcore, 50 u16 offset) 51 { 52 return bcma_read32(mcore->core, offset); 53 } 54 55 static u32 bcma_core_mips_irqflag(struct bcma_device *dev) 56 { 57 u32 flag; 58 59 if (bcma_core_mips_bcm47162a0_quirk(dev)) 60 return dev->core_index; 61 if (bcma_core_mips_bcm5357b0_quirk(dev)) 62 return dev->core_index; 63 flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30); 64 65 if (flag) 66 return flag & 0x1F; 67 else 68 return 0x3f; 69 } 70 71 /* Get the MIPS IRQ assignment for a specified device. 72 * If unassigned, 0 is returned. 73 * If disabled, 5 is returned. 74 * If not supported, 6 is returned. 75 */ 76 unsigned int bcma_core_mips_irq(struct bcma_device *dev) 77 { 78 struct bcma_device *mdev = dev->bus->drv_mips.core; 79 u32 irqflag; 80 unsigned int irq; 81 82 irqflag = bcma_core_mips_irqflag(dev); 83 if (irqflag == 0x3f) 84 return 6; 85 86 for (irq = 0; irq <= 4; irq++) 87 if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) & 88 (1 << irqflag)) 89 return irq; 90 91 return 5; 92 } 93 94 static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq) 95 { 96 unsigned int oldirq = bcma_core_mips_irq(dev); 97 struct bcma_bus *bus = dev->bus; 98 struct bcma_device *mdev = bus->drv_mips.core; 99 u32 irqflag; 100 101 irqflag = bcma_core_mips_irqflag(dev); 102 BUG_ON(oldirq == 6); 103 104 dev->irq = irq + 2; 105 106 /* clear the old irq */ 107 if (oldirq == 0) 108 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0), 109 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) & 110 ~(1 << irqflag)); 111 else if (oldirq != 5) 112 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0); 113 114 /* assign the new one */ 115 if (irq == 0) { 116 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0), 117 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) | 118 (1 << irqflag)); 119 } else { 120 u32 irqinitmask = bcma_read32(mdev, 121 BCMA_MIPS_MIPS74K_INTMASK(irq)); 122 if (irqinitmask) { 123 struct bcma_device *core; 124 125 /* backplane irq line is in use, find out who uses 126 * it and set user to irq 0 127 */ 128 list_for_each_entry(core, &bus->cores, list) { 129 if ((1 << bcma_core_mips_irqflag(core)) == 130 irqinitmask) { 131 bcma_core_mips_set_irq(core, 0); 132 break; 133 } 134 } 135 } 136 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq), 137 1 << irqflag); 138 } 139 140 bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n", 141 dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2); 142 } 143 144 static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq, 145 u16 coreid, u8 unit) 146 { 147 struct bcma_device *core; 148 149 core = bcma_find_core_unit(bus, coreid, unit); 150 if (!core) { 151 bcma_warn(bus, 152 "Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n", 153 coreid, unit); 154 return; 155 } 156 157 bcma_core_mips_set_irq(core, irq); 158 } 159 160 static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq) 161 { 162 int i; 163 static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"}; 164 char interrupts[25]; 165 char *ints = interrupts; 166 167 for (i = 0; i < ARRAY_SIZE(irq_name); i++) 168 ints += sprintf(ints, " %s%c", 169 irq_name[i], i == irq ? '*' : ' '); 170 171 bcma_debug(dev->bus, "core 0x%04x, irq:%s\n", dev->id.id, interrupts); 172 } 173 174 static void bcma_core_mips_dump_irq(struct bcma_bus *bus) 175 { 176 struct bcma_device *core; 177 178 list_for_each_entry(core, &bus->cores, list) { 179 bcma_core_mips_print_irq(core, bcma_core_mips_irq(core)); 180 } 181 } 182 183 u32 bcma_cpu_clock(struct bcma_drv_mips *mcore) 184 { 185 struct bcma_bus *bus = mcore->core->bus; 186 187 if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU) 188 return bcma_pmu_get_cpu_clock(&bus->drv_cc); 189 190 bcma_err(bus, "No PMU available, need this to get the cpu clock\n"); 191 return 0; 192 } 193 EXPORT_SYMBOL(bcma_cpu_clock); 194 195 static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus) 196 { 197 struct bcma_drv_cc *cc = &bus->drv_cc; 198 u8 cc_rev = cc->core->id.rev; 199 200 if (cc_rev == 42) { 201 struct bcma_device *core; 202 203 core = bcma_find_core(bus, BCMA_CORE_NS_ROM); 204 if (core) { 205 switch (bcma_aread32(core, BCMA_IOST) & 206 BCMA_NS_ROM_IOST_BOOT_DEV_MASK) { 207 case BCMA_NS_ROM_IOST_BOOT_DEV_NOR: 208 return BCMA_BOOT_DEV_SERIAL; 209 case BCMA_NS_ROM_IOST_BOOT_DEV_NAND: 210 return BCMA_BOOT_DEV_NAND; 211 case BCMA_NS_ROM_IOST_BOOT_DEV_ROM: 212 default: 213 return BCMA_BOOT_DEV_ROM; 214 } 215 } 216 } else { 217 if (cc_rev == 38) { 218 if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT) 219 return BCMA_BOOT_DEV_NAND; 220 else if (cc->status & BIT(5)) 221 return BCMA_BOOT_DEV_ROM; 222 } 223 224 if ((cc->capabilities & BCMA_CC_CAP_FLASHT) == 225 BCMA_CC_FLASHT_PARA) 226 return BCMA_BOOT_DEV_PARALLEL; 227 else 228 return BCMA_BOOT_DEV_SERIAL; 229 } 230 231 return BCMA_BOOT_DEV_SERIAL; 232 } 233 234 static void bcma_core_mips_nvram_init(struct bcma_drv_mips *mcore) 235 { 236 struct bcma_bus *bus = mcore->core->bus; 237 enum bcma_boot_dev boot_dev; 238 239 /* Determine flash type this SoC boots from */ 240 boot_dev = bcma_boot_dev(bus); 241 switch (boot_dev) { 242 case BCMA_BOOT_DEV_PARALLEL: 243 case BCMA_BOOT_DEV_SERIAL: 244 #ifdef CONFIG_BCM47XX 245 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH2, 246 BCMA_SOC_FLASH2_SZ); 247 #endif 248 break; 249 case BCMA_BOOT_DEV_NAND: 250 #ifdef CONFIG_BCM47XX 251 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH1, 252 BCMA_SOC_FLASH1_SZ); 253 #endif 254 break; 255 default: 256 break; 257 } 258 } 259 260 void bcma_core_mips_early_init(struct bcma_drv_mips *mcore) 261 { 262 struct bcma_bus *bus = mcore->core->bus; 263 264 if (mcore->early_setup_done) 265 return; 266 267 bcma_chipco_serial_init(&bus->drv_cc); 268 bcma_core_mips_nvram_init(mcore); 269 270 mcore->early_setup_done = true; 271 } 272 273 static void bcma_fix_i2s_irqflag(struct bcma_bus *bus) 274 { 275 struct bcma_device *cpu, *pcie, *i2s; 276 277 /* Fixup the interrupts in 4716/4748 for i2s core (2010 Broadcom SDK) 278 * (IRQ flags > 7 are ignored when setting the interrupt masks) 279 */ 280 if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4716 && 281 bus->chipinfo.id != BCMA_CHIP_ID_BCM4748) 282 return; 283 284 cpu = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 285 pcie = bcma_find_core(bus, BCMA_CORE_PCIE); 286 i2s = bcma_find_core(bus, BCMA_CORE_I2S); 287 if (cpu && pcie && i2s && 288 bcma_aread32(cpu, BCMA_MIPS_OOBSELINA74) == 0x08060504 && 289 bcma_aread32(pcie, BCMA_MIPS_OOBSELINA74) == 0x08060504 && 290 bcma_aread32(i2s, BCMA_MIPS_OOBSELOUTA30) == 0x88) { 291 bcma_awrite32(cpu, BCMA_MIPS_OOBSELINA74, 0x07060504); 292 bcma_awrite32(pcie, BCMA_MIPS_OOBSELINA74, 0x07060504); 293 bcma_awrite32(i2s, BCMA_MIPS_OOBSELOUTA30, 0x87); 294 bcma_debug(bus, 295 "Moved i2s interrupt to oob line 7 instead of 8\n"); 296 } 297 } 298 299 void bcma_core_mips_init(struct bcma_drv_mips *mcore) 300 { 301 struct bcma_bus *bus; 302 struct bcma_device *core; 303 bus = mcore->core->bus; 304 305 if (mcore->setup_done) 306 return; 307 308 bcma_debug(bus, "Initializing MIPS core...\n"); 309 310 bcma_core_mips_early_init(mcore); 311 312 bcma_fix_i2s_irqflag(bus); 313 314 switch (bus->chipinfo.id) { 315 case BCMA_CHIP_ID_BCM4716: 316 case BCMA_CHIP_ID_BCM4748: 317 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0); 318 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0); 319 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0); 320 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_PCIE, 0); 321 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0); 322 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0); 323 break; 324 case BCMA_CHIP_ID_BCM5356: 325 case BCMA_CHIP_ID_BCM47162: 326 case BCMA_CHIP_ID_BCM53572: 327 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0); 328 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0); 329 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0); 330 break; 331 case BCMA_CHIP_ID_BCM5357: 332 case BCMA_CHIP_ID_BCM4749: 333 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0); 334 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0); 335 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0); 336 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0); 337 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0); 338 break; 339 case BCMA_CHIP_ID_BCM4706: 340 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_PCIE, 0); 341 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_4706_MAC_GBIT, 342 0); 343 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_PCIE, 1); 344 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_USB20_HOST, 0); 345 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_4706_CHIPCOMMON, 346 0); 347 break; 348 default: 349 list_for_each_entry(core, &bus->cores, list) { 350 core->irq = bcma_core_irq(core, 0); 351 } 352 bcma_err(bus, 353 "Unknown device (0x%x) found, can not configure IRQs\n", 354 bus->chipinfo.id); 355 } 356 bcma_debug(bus, "IRQ reconfiguration done\n"); 357 bcma_core_mips_dump_irq(bus); 358 359 mcore->setup_done = true; 360 } 361