|  | /* | 
|  | * Broadcom specific AMBA | 
|  | * Broadcom MIPS32 74K core driver | 
|  | * | 
|  | * Copyright 2009, Broadcom Corporation | 
|  | * Copyright 2006, 2007, Michael Buesch <[email protected]> | 
|  | * Copyright 2010, Bernhard Loos <[email protected]> | 
|  | * Copyright 2011, Hauke Mehrtens <[email protected]> | 
|  | * | 
|  | * Licensed under the GNU/GPL. See COPYING for details. | 
|  | */ | 
|  |  | 
|  | #include "bcma_private.h" | 
|  |  | 
|  | #include <linux/bcma/bcma.h> | 
|  |  | 
|  | #include <linux/mtd/physmap.h> | 
|  | #include <linux/platform_device.h> | 
|  | #include <linux/serial.h> | 
|  | #include <linux/serial_core.h> | 
|  | #include <linux/serial_reg.h> | 
|  | #include <linux/time.h> | 
|  |  | 
|  | static const char * const part_probes[] = { "bcm47xxpart", NULL }; | 
|  |  | 
|  | static struct physmap_flash_data bcma_pflash_data = { | 
|  | .part_probe_types	= part_probes, | 
|  | }; | 
|  |  | 
|  | static struct resource bcma_pflash_resource = { | 
|  | .name	= "bcma_pflash", | 
|  | .flags  = IORESOURCE_MEM, | 
|  | }; | 
|  |  | 
|  | struct platform_device bcma_pflash_dev = { | 
|  | .name		= "physmap-flash", | 
|  | .dev		= { | 
|  | .platform_data  = &bcma_pflash_data, | 
|  | }, | 
|  | .resource	= &bcma_pflash_resource, | 
|  | .num_resources	= 1, | 
|  | }; | 
|  |  | 
|  | /* 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. | 
|  | */ | 
|  | static 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; | 
|  | } | 
|  |  | 
|  | unsigned int bcma_core_irq(struct bcma_device *dev) | 
|  | { | 
|  | unsigned int mips_irq = bcma_core_mips_irq(dev); | 
|  | return mips_irq <= 4 ? mips_irq + 2 : 0; | 
|  | } | 
|  | EXPORT_SYMBOL(bcma_core_irq); | 
|  |  | 
|  | 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"}; | 
|  | printk(KERN_DEBUG KBUILD_MODNAME ": core 0x%04x, irq :", dev->id.id); | 
|  | for (i = 0; i <= 6; i++) | 
|  | printk(" %s%s", irq_name[i], i == irq ? "*" : " "); | 
|  | printk("\n"); | 
|  | } | 
|  |  | 
|  | 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 void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore) | 
|  | { | 
|  | struct bcma_bus *bus = mcore->core->bus; | 
|  | struct bcma_drv_cc *cc = &bus->drv_cc; | 
|  | struct bcma_pflash *pflash = &cc->pflash; | 
|  |  | 
|  | switch (cc->capabilities & BCMA_CC_CAP_FLASHT) { | 
|  | case BCMA_CC_FLASHT_STSER: | 
|  | case BCMA_CC_FLASHT_ATSER: | 
|  | bcma_debug(bus, "Found serial flash\n"); | 
|  | bcma_sflash_init(cc); | 
|  | break; | 
|  | case BCMA_CC_FLASHT_PARA: | 
|  | bcma_debug(bus, "Found parallel flash\n"); | 
|  | pflash->present = true; | 
|  | pflash->window = BCMA_SOC_FLASH2; | 
|  | pflash->window_size = BCMA_SOC_FLASH2_SZ; | 
|  |  | 
|  | if ((bcma_read32(cc->core, BCMA_CC_FLASH_CFG) & | 
|  | BCMA_CC_FLASH_CFG_DS) == 0) | 
|  | pflash->buswidth = 1; | 
|  | else | 
|  | pflash->buswidth = 2; | 
|  |  | 
|  | bcma_pflash_data.width = pflash->buswidth; | 
|  | bcma_pflash_resource.start = pflash->window; | 
|  | bcma_pflash_resource.end = pflash->window + pflash->window_size; | 
|  |  | 
|  | break; | 
|  | default: | 
|  | bcma_err(bus, "Flash type not supported\n"); | 
|  | } | 
|  |  | 
|  | if (cc->core->id.rev == 38 || | 
|  | bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) { | 
|  | if (cc->capabilities & BCMA_CC_CAP_NFLASH) { | 
|  | bcma_debug(bus, "Found NAND flash\n"); | 
|  | bcma_nflash_init(cc); | 
|  | } | 
|  | } | 
|  | } | 
|  |  | 
|  | 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_flash_detect(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); | 
|  | } | 
|  | 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; | 
|  | } |