/* * Broadcom specific AMBA * Broadcom MIPS32 74K core driver * * Copyright 2009, Broadcom Corporation * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de> * Copyright 2010, Bernhard Loos <bernhardloos@googlemail.com> * Copyright 2011, Hauke Mehrtens <hauke@hauke-m.de> * * Licensed under the GNU/GPL. See COPYING for details. */ #include "bcma_private.h" #include <linux/bcma/bcma.h> #include <linux/serial.h> #include <linux/serial_core.h> #include <linux/serial_reg.h> #include <linux/time.h> #ifdef CONFIG_BCM47XX #include <linux/bcm47xx_nvram.h> #endif enum bcma_boot_dev { BCMA_BOOT_DEV_UNK = 0, BCMA_BOOT_DEV_ROM, BCMA_BOOT_DEV_PARALLEL, BCMA_BOOT_DEV_SERIAL, BCMA_BOOT_DEV_NAND, }; /* The 47162a0 hangs when reading MIPS DMP registers registers */ static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev) { return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 && dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K; } /* The 5357b0 hangs when reading USB20H DMP registers */ static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device *dev) { return (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 || dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) && dev->bus->chipinfo.pkg == 11 && dev->id.id == BCMA_CORE_USB20_HOST; } static inline u32 mips_read32(struct bcma_drv_mips *mcore, u16 offset) { return bcma_read32(mcore->core, offset); } static inline void mips_write32(struct bcma_drv_mips *mcore, u16 offset, u32 value) { bcma_write32(mcore->core, offset, value); } static const u32 ipsflag_irq_mask[] = { 0, BCMA_MIPS_IPSFLAG_IRQ1, BCMA_MIPS_IPSFLAG_IRQ2, BCMA_MIPS_IPSFLAG_IRQ3, BCMA_MIPS_IPSFLAG_IRQ4, }; static const u32 ipsflag_irq_shift[] = { 0, BCMA_MIPS_IPSFLAG_IRQ1_SHIFT, BCMA_MIPS_IPSFLAG_IRQ2_SHIFT, BCMA_MIPS_IPSFLAG_IRQ3_SHIFT, BCMA_MIPS_IPSFLAG_IRQ4_SHIFT, }; static u32 bcma_core_mips_irqflag(struct bcma_device *dev) { u32 flag; if (bcma_core_mips_bcm47162a0_quirk(dev)) return dev->core_index; if (bcma_core_mips_bcm5357b0_quirk(dev)) return dev->core_index; flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30); if (flag) return flag & 0x1F; else return 0x3f; } /* Get the MIPS IRQ assignment for a specified device. * If unassigned, 0 is returned. * If disabled, 5 is returned. * If not supported, 6 is returned. */ unsigned int bcma_core_mips_irq(struct bcma_device *dev) { struct bcma_device *mdev = dev->bus->drv_mips.core; u32 irqflag; unsigned int irq; irqflag = bcma_core_mips_irqflag(dev); if (irqflag == 0x3f) return 6; for (irq = 0; irq <= 4; irq++) if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) & (1 << irqflag)) return irq; return 5; } static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq) { unsigned int oldirq = bcma_core_mips_irq(dev); struct bcma_bus *bus = dev->bus; struct bcma_device *mdev = bus->drv_mips.core; u32 irqflag; irqflag = bcma_core_mips_irqflag(dev); BUG_ON(oldirq == 6); dev->irq = irq + 2; /* clear the old irq */ if (oldirq == 0) bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0), bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) & ~(1 << irqflag)); else if (oldirq != 5) bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0); /* assign the new one */ if (irq == 0) { bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0), bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) | (1 << irqflag)); } else { u32 irqinitmask = bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)); if (irqinitmask) { struct bcma_device *core; /* backplane irq line is in use, find out who uses * it and set user to irq 0 */ list_for_each_entry(core, &bus->cores, list) { if ((1 << bcma_core_mips_irqflag(core)) == irqinitmask) { bcma_core_mips_set_irq(core, 0); break; } } } bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq), 1 << irqflag); } bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n", dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2); } static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq, u16 coreid, u8 unit) { struct bcma_device *core; core = bcma_find_core_unit(bus, coreid, unit); if (!core) { bcma_warn(bus, "Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n", coreid, unit); return; } bcma_core_mips_set_irq(core, irq); } static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq) { int i; static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"}; char interrupts[25]; char *ints = interrupts; for (i = 0; i < ARRAY_SIZE(irq_name); i++) ints += sprintf(ints, " %s%c", irq_name[i], i == irq ? '*' : ' '); bcma_debug(dev->bus, "core 0x%04x, irq:%s\n", dev->id.id, interrupts); } static void bcma_core_mips_dump_irq(struct bcma_bus *bus) { struct bcma_device *core; list_for_each_entry(core, &bus->cores, list) { bcma_core_mips_print_irq(core, bcma_core_mips_irq(core)); } } u32 bcma_cpu_clock(struct bcma_drv_mips *mcore) { struct bcma_bus *bus = mcore->core->bus; if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU) return bcma_pmu_get_cpu_clock(&bus->drv_cc); bcma_err(bus, "No PMU available, need this to get the cpu clock\n"); return 0; } EXPORT_SYMBOL(bcma_cpu_clock); static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus) { struct bcma_drv_cc *cc = &bus->drv_cc; u8 cc_rev = cc->core->id.rev; if (cc_rev == 42) { struct bcma_device *core; core = bcma_find_core(bus, BCMA_CORE_NS_ROM); if (core) { switch (bcma_aread32(core, BCMA_IOST) & BCMA_NS_ROM_IOST_BOOT_DEV_MASK) { case BCMA_NS_ROM_IOST_BOOT_DEV_NOR: return BCMA_BOOT_DEV_SERIAL; case BCMA_NS_ROM_IOST_BOOT_DEV_NAND: return BCMA_BOOT_DEV_NAND; case BCMA_NS_ROM_IOST_BOOT_DEV_ROM: default: return BCMA_BOOT_DEV_ROM; } } } else { if (cc_rev == 38) { if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT) return BCMA_BOOT_DEV_NAND; else if (cc->status & BIT(5)) return BCMA_BOOT_DEV_ROM; } if ((cc->capabilities & BCMA_CC_CAP_FLASHT) == BCMA_CC_FLASHT_PARA) return BCMA_BOOT_DEV_PARALLEL; else return BCMA_BOOT_DEV_SERIAL; } return BCMA_BOOT_DEV_SERIAL; } static void bcma_core_mips_nvram_init(struct bcma_drv_mips *mcore) { struct bcma_bus *bus = mcore->core->bus; enum bcma_boot_dev boot_dev; /* Determine flash type this SoC boots from */ boot_dev = bcma_boot_dev(bus); switch (boot_dev) { case BCMA_BOOT_DEV_PARALLEL: case BCMA_BOOT_DEV_SERIAL: #ifdef CONFIG_BCM47XX bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH2, BCMA_SOC_FLASH2_SZ); #endif break; case BCMA_BOOT_DEV_NAND: #ifdef CONFIG_BCM47XX bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH1, BCMA_SOC_FLASH1_SZ); #endif break; default: break; } } void bcma_core_mips_early_init(struct bcma_drv_mips *mcore) { struct bcma_bus *bus = mcore->core->bus; if (mcore->early_setup_done) return; bcma_chipco_serial_init(&bus->drv_cc); bcma_core_mips_nvram_init(mcore); mcore->early_setup_done = true; } static void bcma_fix_i2s_irqflag(struct bcma_bus *bus) { struct bcma_device *cpu, *pcie, *i2s; /* Fixup the interrupts in 4716/4748 for i2s core (2010 Broadcom SDK) * (IRQ flags > 7 are ignored when setting the interrupt masks) */ if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4716 && bus->chipinfo.id != BCMA_CHIP_ID_BCM4748) return; cpu = bcma_find_core(bus, BCMA_CORE_MIPS_74K); pcie = bcma_find_core(bus, BCMA_CORE_PCIE); i2s = bcma_find_core(bus, BCMA_CORE_I2S); if (cpu && pcie && i2s && bcma_aread32(cpu, BCMA_MIPS_OOBSELINA74) == 0x08060504 && bcma_aread32(pcie, BCMA_MIPS_OOBSELINA74) == 0x08060504 && bcma_aread32(i2s, BCMA_MIPS_OOBSELOUTA30) == 0x88) { bcma_awrite32(cpu, BCMA_MIPS_OOBSELINA74, 0x07060504); bcma_awrite32(pcie, BCMA_MIPS_OOBSELINA74, 0x07060504); bcma_awrite32(i2s, BCMA_MIPS_OOBSELOUTA30, 0x87); bcma_debug(bus, "Moved i2s interrupt to oob line 7 instead of 8\n"); } } void bcma_core_mips_init(struct bcma_drv_mips *mcore) { struct bcma_bus *bus; struct bcma_device *core; bus = mcore->core->bus; if (mcore->setup_done) return; bcma_debug(bus, "Initializing MIPS core...\n"); bcma_core_mips_early_init(mcore); bcma_fix_i2s_irqflag(bus); switch (bus->chipinfo.id) { case BCMA_CHIP_ID_BCM4716: case BCMA_CHIP_ID_BCM4748: bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0); bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0); bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0); bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_PCIE, 0); bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0); bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0); break; case BCMA_CHIP_ID_BCM5356: case BCMA_CHIP_ID_BCM47162: case BCMA_CHIP_ID_BCM53572: bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0); bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0); bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0); break; case BCMA_CHIP_ID_BCM5357: case BCMA_CHIP_ID_BCM4749: bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0); bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0); bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0); bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0); bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0); break; case BCMA_CHIP_ID_BCM4706: bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_PCIE, 0); bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_4706_MAC_GBIT, 0); bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_PCIE, 1); bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_USB20_HOST, 0); bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_4706_CHIPCOMMON, 0); break; default: list_for_each_entry(core, &bus->cores, list) { core->irq = bcma_core_irq(core, 0); } bcma_err(bus, "Unknown device (0x%x) found, can not configure IRQs\n", bus->chipinfo.id); } bcma_debug(bus, "IRQ reconfiguration done\n"); bcma_core_mips_dump_irq(bus); mcore->setup_done = true; }