drivers/bcma/scan.c - kernel/msm-4.19 - Gitiles

 /*
  * Broadcom specific AMBA
  * Bus scanning
  *
  * Licensed under the GNU/GPL. See COPYING for details.
  */

 #include "scan.h"
 #include "bcma_private.h"

 #include <linux/bcma/bcma.h>
 #include <linux/bcma/bcma_regs.h>
 #include <linux/pci.h>
 #include <linux/io.h>
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>

 struct bcma_device_id_name {
 	u16 id;
 	const char *name;
 };
 struct bcma_device_id_name bcma_device_names[] = {
 	{ BCMA_CORE_OOB_ROUTER, "OOB Router" },
 	{ BCMA_CORE_INVALID, "Invalid" },
 	{ BCMA_CORE_CHIPCOMMON, "ChipCommon" },
 	{ BCMA_CORE_ILINE20, "ILine 20" },
 	{ BCMA_CORE_SRAM, "SRAM" },
 	{ BCMA_CORE_SDRAM, "SDRAM" },
 	{ BCMA_CORE_PCI, "PCI" },
 	{ BCMA_CORE_MIPS, "MIPS" },
 	{ BCMA_CORE_ETHERNET, "Fast Ethernet" },
 	{ BCMA_CORE_V90, "V90" },
 	{ BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
 	{ BCMA_CORE_ADSL, "ADSL" },
 	{ BCMA_CORE_ILINE100, "ILine 100" },
 	{ BCMA_CORE_IPSEC, "IPSEC" },
 	{ BCMA_CORE_UTOPIA, "UTOPIA" },
 	{ BCMA_CORE_PCMCIA, "PCMCIA" },
 	{ BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
 	{ BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
 	{ BCMA_CORE_OFDM, "OFDM" },
 	{ BCMA_CORE_EXTIF, "EXTIF" },
 	{ BCMA_CORE_80211, "IEEE 802.11" },
 	{ BCMA_CORE_PHY_A, "PHY A" },
 	{ BCMA_CORE_PHY_B, "PHY B" },
 	{ BCMA_CORE_PHY_G, "PHY G" },
 	{ BCMA_CORE_MIPS_3302, "MIPS 3302" },
 	{ BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
 	{ BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
 	{ BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
 	{ BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
 	{ BCMA_CORE_SDIO_HOST, "SDIO Host" },
 	{ BCMA_CORE_ROBOSWITCH, "Roboswitch" },
 	{ BCMA_CORE_PARA_ATA, "PATA" },
 	{ BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
 	{ BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
 	{ BCMA_CORE_PCIE, "PCIe" },
 	{ BCMA_CORE_PHY_N, "PHY N" },
 	{ BCMA_CORE_SRAM_CTL, "SRAM Controller" },
 	{ BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
 	{ BCMA_CORE_ARM_1176, "ARM 1176" },
 	{ BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
 	{ BCMA_CORE_PHY_LP, "PHY LP" },
 	{ BCMA_CORE_PMU, "PMU" },
 	{ BCMA_CORE_PHY_SSN, "PHY SSN" },
 	{ BCMA_CORE_SDIO_DEV, "SDIO Device" },
 	{ BCMA_CORE_ARM_CM3, "ARM CM3" },
 	{ BCMA_CORE_PHY_HT, "PHY HT" },
 	{ BCMA_CORE_MIPS_74K, "MIPS 74K" },
 	{ BCMA_CORE_MAC_GBIT, "GBit MAC" },
 	{ BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
 	{ BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
 	{ BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
 	{ BCMA_CORE_SHARED_COMMON, "Common Shared" },
 	{ BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
 	{ BCMA_CORE_SPI_HOST, "SPI Host" },
 	{ BCMA_CORE_I2S, "I2S" },
 	{ BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
 	{ BCMA_CORE_SHIM, "SHIM" },
 	{ BCMA_CORE_DEFAULT, "Default" },
 };
 const char *bcma_device_name(struct bcma_device_id *id)
 {
 	int i;

 	if (id->manuf == BCMA_MANUF_BCM) {
 		for (i = 0; i < ARRAY_SIZE(bcma_device_names); i++) {
 			if (bcma_device_names[i].id == id->id)
 				return bcma_device_names[i].name;
 		}
 	}
 	return "UNKNOWN";
 }

 static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx,
 		       u16 offset)
 {
 	return readl(bus->mmio + offset);
 }

 static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
 {
 	if (bus->hosttype == BCMA_HOSTTYPE_PCI)
 		pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
 				       addr);
 }

 static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 **eromptr)
 {
 	u32 ent = readl(*eromptr);
 	(*eromptr)++;
 	return ent;
 }

 static void bcma_erom_push_ent(u32 **eromptr)
 {
 	(*eromptr)--;
 }

 static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 **eromptr)
 {
 	u32 ent = bcma_erom_get_ent(bus, eromptr);
 	if (!(ent & SCAN_ER_VALID))
 		return -ENOENT;
 	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
 		return -ENOENT;
 	return ent;
 }

 static bool bcma_erom_is_end(struct bcma_bus *bus, u32 **eromptr)
 {
 	u32 ent = bcma_erom_get_ent(bus, eromptr);
 	bcma_erom_push_ent(eromptr);
 	return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
 }

 static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 **eromptr)
 {
 	u32 ent = bcma_erom_get_ent(bus, eromptr);
 	bcma_erom_push_ent(eromptr);
 	return (((ent & SCAN_ER_VALID)) &&
 		((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
 		((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
 }

 static void bcma_erom_skip_component(struct bcma_bus *bus, u32 **eromptr)
 {
 	u32 ent;
 	while (1) {
 		ent = bcma_erom_get_ent(bus, eromptr);
 		if ((ent & SCAN_ER_VALID) &&
 		    ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
 			break;
 		if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
 			break;
 	}
 	bcma_erom_push_ent(eromptr);
 }

 static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 **eromptr)
 {
 	u32 ent = bcma_erom_get_ent(bus, eromptr);
 	if (!(ent & SCAN_ER_VALID))
 		return -ENOENT;
 	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
 		return -ENOENT;
 	return ent;
 }

 static s32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 **eromptr,
 				  u32 type, u8 port)
 {
 	u32 addrl, addrh, sizel, sizeh = 0;
 	u32 size;

 	u32 ent = bcma_erom_get_ent(bus, eromptr);
 	if ((!(ent & SCAN_ER_VALID)) ||
 	    ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
 	    ((ent & SCAN_ADDR_TYPE) != type) ||
 	    (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
 		bcma_erom_push_ent(eromptr);
 		return -EINVAL;
 	}

 	addrl = ent & SCAN_ADDR_ADDR;
 	if (ent & SCAN_ADDR_AG32)
 		addrh = bcma_erom_get_ent(bus, eromptr);
 	else
 		addrh = 0;

 	if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
 		size = bcma_erom_get_ent(bus, eromptr);
 		sizel = size & SCAN_SIZE_SZ;
 		if (size & SCAN_SIZE_SG32)
 			sizeh = bcma_erom_get_ent(bus, eromptr);
 	} else
 		sizel = SCAN_ADDR_SZ_BASE <<
 				((ent & SCAN_ADDR_SZ) >> SCAN_ADDR_SZ_SHIFT);

 	return addrl;
 }

 static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
 						   u16 index)
 {
 	struct bcma_device *core;

 	list_for_each_entry(core, &bus->cores, list) {
 		if (core->core_index == index)
 			return core;
 	}
 	return NULL;
 }

 static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
 			      struct bcma_device_id *match, int core_num,
 			      struct bcma_device *core)
 {
 	s32 tmp;
 	u8 i, j;
 	s32 cia, cib;
 	u8 ports[2], wrappers[2];

 	/* get CIs */
 	cia = bcma_erom_get_ci(bus, eromptr);
 	if (cia < 0) {
 		bcma_erom_push_ent(eromptr);
 		if (bcma_erom_is_end(bus, eromptr))
 			return -ESPIPE;
 		return -EILSEQ;
 	}
 	cib = bcma_erom_get_ci(bus, eromptr);
 	if (cib < 0)
 		return -EILSEQ;

 	/* parse CIs */
 	core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
 	core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
 	core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
 	ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
 	ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
 	wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
 	wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
 	core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;

 	if (((core->id.manuf == BCMA_MANUF_ARM) &&
 	     (core->id.id == 0xFFF)) ||
 	    (ports[1] == 0)) {
 		bcma_erom_skip_component(bus, eromptr);
 		return -ENXIO;
 	}

 	/* check if component is a core at all */
 	if (wrappers[0] + wrappers[1] == 0) {
 		/* we could save addrl of the router
 		if (cid == BCMA_CORE_OOB_ROUTER)
 		 */
 		bcma_erom_skip_component(bus, eromptr);
 		return -ENXIO;
 	}

 	if (bcma_erom_is_bridge(bus, eromptr)) {
 		bcma_erom_skip_component(bus, eromptr);
 		return -ENXIO;
 	}

 	if (bcma_find_core_by_index(bus, core_num)) {
 		bcma_erom_skip_component(bus, eromptr);
 		return -ENODEV;
 	}

 	if (match && ((match->manuf != BCMA_ANY_MANUF &&
 	      match->manuf != core->id.manuf) ||
 	     (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
 	     (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
 	     (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
 	    )) {
 		bcma_erom_skip_component(bus, eromptr);
 		return -ENODEV;
 	}

 	/* get & parse master ports */
 	for (i = 0; i < ports[0]; i++) {
 		s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
 		if (mst_port_d < 0)
 			return -EILSEQ;
 	}

 	/* get & parse slave ports */
 	for (i = 0; i < ports[1]; i++) {
 		for (j = 0; ; j++) {
 			tmp = bcma_erom_get_addr_desc(bus, eromptr,
 				SCAN_ADDR_TYPE_SLAVE, i);
 			if (tmp < 0) {
 				/* no more entries for port _i_ */
 				/* pr_debug("erom: slave port %d "
 				 * "has %d descriptors\n", i, j); */
 				break;
 			} else {
 				if (i == 0 && j == 0)
 					core->addr = tmp;
 			}
 		}
 	}

 	/* get & parse master wrappers */
 	for (i = 0; i < wrappers[0]; i++) {
 		for (j = 0; ; j++) {
 			tmp = bcma_erom_get_addr_desc(bus, eromptr,
 				SCAN_ADDR_TYPE_MWRAP, i);
 			if (tmp < 0) {
 				/* no more entries for port _i_ */
 				/* pr_debug("erom: master wrapper %d "
 				 * "has %d descriptors\n", i, j); */
 				break;
 			} else {
 				if (i == 0 && j == 0)
 					core->wrap = tmp;
 			}
 		}
 	}

 	/* get & parse slave wrappers */
 	for (i = 0; i < wrappers[1]; i++) {
 		u8 hack = (ports[1] == 1) ? 0 : 1;
 		for (j = 0; ; j++) {
 			tmp = bcma_erom_get_addr_desc(bus, eromptr,
 				SCAN_ADDR_TYPE_SWRAP, i + hack);
 			if (tmp < 0) {
 				/* no more entries for port _i_ */
 				/* pr_debug("erom: master wrapper %d "
 				 * has %d descriptors\n", i, j); */
 				break;
 			} else {
 				if (wrappers[0] == 0 && !i && !j)
 					core->wrap = tmp;
 			}
 		}
 	}
 	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
 		core->io_addr = ioremap_nocache(core->addr, BCMA_CORE_SIZE);
 		if (!core->io_addr)
 			return -ENOMEM;
 		core->io_wrap = ioremap_nocache(core->wrap, BCMA_CORE_SIZE);
 		if (!core->io_wrap) {
 			iounmap(core->io_addr);
 			return -ENOMEM;
 		}
 	}
 	return 0;
 }

 void bcma_init_bus(struct bcma_bus *bus)
 {
 	s32 tmp;

 	if (bus->init_done)
 		return;

 	INIT_LIST_HEAD(&bus->cores);
 	bus->nr_cores = 0;

 	bcma_scan_switch_core(bus, BCMA_ADDR_BASE);

 	tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
 	bus->chipinfo.id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
 	bus->chipinfo.rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
 	bus->chipinfo.pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
 	bus->init_done = true;
 }

 int bcma_bus_scan(struct bcma_bus *bus)
 {
 	u32 erombase;
 	u32 __iomem *eromptr, *eromend;

 	int err, core_num = 0;

 	bcma_init_bus(bus);

 	erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
 	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
 		eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
 		if (!eromptr)
 			return -ENOMEM;
 	} else {
 		eromptr = bus->mmio;
 	}

 	eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);

 	bcma_scan_switch_core(bus, erombase);

 	while (eromptr < eromend) {
 		struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
 		if (!core)
 			return -ENOMEM;
 		INIT_LIST_HEAD(&core->list);
 		core->bus = bus;

 		err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
 		if (err < 0) {
 			kfree(core);
 			if (err == -ENODEV) {
 				core_num++;
 				continue;
 			} else if (err == -ENXIO) {
 				continue;
 			} else if (err == -ESPIPE) {
 				break;
 			}
 			return err;
 		}

 		core->core_index = core_num++;
 		bus->nr_cores++;

 		pr_info("Core %d found: %s "
 			"(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
 			core->core_index, bcma_device_name(&core->id),
 			core->id.manuf, core->id.id, core->id.rev,
 			core->id.class);

 		list_add(&core->list, &bus->cores);
 	}

 	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
 		iounmap(eromptr);

 	return 0;
 }

 int __init bcma_bus_scan_early(struct bcma_bus *bus,
 			       struct bcma_device_id *match,
 			       struct bcma_device *core)
 {
 	u32 erombase;
 	u32 __iomem *eromptr, *eromend;

 	int err = -ENODEV;
 	int core_num = 0;

 	erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
 	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
 		eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
 		if (!eromptr)
 			return -ENOMEM;
 	} else {
 		eromptr = bus->mmio;
 	}

 	eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);

 	bcma_scan_switch_core(bus, erombase);

 	while (eromptr < eromend) {
 		memset(core, 0, sizeof(*core));
 		INIT_LIST_HEAD(&core->list);
 		core->bus = bus;

 		err = bcma_get_next_core(bus, &eromptr, match, core_num, core);
 		if (err == -ENODEV) {
 			core_num++;
 			continue;
 		} else if (err == -ENXIO)
 			continue;
 		else if (err == -ESPIPE)
 			break;
 		else if (err < 0)
 			return err;

 		core->core_index = core_num++;
 		bus->nr_cores++;
 		pr_info("Core %d found: %s "
 			"(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
 			core->core_index, bcma_device_name(&core->id),
 			core->id.manuf, core->id.id, core->id.rev,
 			core->id.class);

 		list_add(&core->list, &bus->cores);
 		err = 0;
 		break;
 	}

 	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
 		iounmap(eromptr);

 	return err;
 }
	/*
	* Broadcom specific AMBA
	* Bus scanning
	*
	* Licensed under the GNU/GPL. See COPYING for details.
	*/

	#include "scan.h"
	#include "bcma_private.h"

	#include <linux/bcma/bcma.h>
	#include <linux/bcma/bcma_regs.h>
	#include <linux/pci.h>
	#include <linux/io.h>
	#include <linux/dma-mapping.h>
	#include <linux/slab.h>

	struct bcma_device_id_name {
	u16 id;
	const char *name;
	};
	struct bcma_device_id_name bcma_device_names[] = {
	{ BCMA_CORE_OOB_ROUTER, "OOB Router" },
	{ BCMA_CORE_INVALID, "Invalid" },
	{ BCMA_CORE_CHIPCOMMON, "ChipCommon" },
	{ BCMA_CORE_ILINE20, "ILine 20" },
	{ BCMA_CORE_SRAM, "SRAM" },
	{ BCMA_CORE_SDRAM, "SDRAM" },
	{ BCMA_CORE_PCI, "PCI" },
	{ BCMA_CORE_MIPS, "MIPS" },
	{ BCMA_CORE_ETHERNET, "Fast Ethernet" },
	{ BCMA_CORE_V90, "V90" },
	{ BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
	{ BCMA_CORE_ADSL, "ADSL" },
	{ BCMA_CORE_ILINE100, "ILine 100" },
	{ BCMA_CORE_IPSEC, "IPSEC" },
	{ BCMA_CORE_UTOPIA, "UTOPIA" },
	{ BCMA_CORE_PCMCIA, "PCMCIA" },
	{ BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
	{ BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
	{ BCMA_CORE_OFDM, "OFDM" },
	{ BCMA_CORE_EXTIF, "EXTIF" },
	{ BCMA_CORE_80211, "IEEE 802.11" },
	{ BCMA_CORE_PHY_A, "PHY A" },
	{ BCMA_CORE_PHY_B, "PHY B" },
	{ BCMA_CORE_PHY_G, "PHY G" },
	{ BCMA_CORE_MIPS_3302, "MIPS 3302" },
	{ BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
	{ BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
	{ BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
	{ BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
	{ BCMA_CORE_SDIO_HOST, "SDIO Host" },
	{ BCMA_CORE_ROBOSWITCH, "Roboswitch" },
	{ BCMA_CORE_PARA_ATA, "PATA" },
	{ BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
	{ BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
	{ BCMA_CORE_PCIE, "PCIe" },
	{ BCMA_CORE_PHY_N, "PHY N" },
	{ BCMA_CORE_SRAM_CTL, "SRAM Controller" },
	{ BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
	{ BCMA_CORE_ARM_1176, "ARM 1176" },
	{ BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
	{ BCMA_CORE_PHY_LP, "PHY LP" },
	{ BCMA_CORE_PMU, "PMU" },
	{ BCMA_CORE_PHY_SSN, "PHY SSN" },
	{ BCMA_CORE_SDIO_DEV, "SDIO Device" },
	{ BCMA_CORE_ARM_CM3, "ARM CM3" },
	{ BCMA_CORE_PHY_HT, "PHY HT" },
	{ BCMA_CORE_MIPS_74K, "MIPS 74K" },
	{ BCMA_CORE_MAC_GBIT, "GBit MAC" },
	{ BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
	{ BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
	{ BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
	{ BCMA_CORE_SHARED_COMMON, "Common Shared" },
	{ BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
	{ BCMA_CORE_SPI_HOST, "SPI Host" },
	{ BCMA_CORE_I2S, "I2S" },
	{ BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
	{ BCMA_CORE_SHIM, "SHIM" },
	{ BCMA_CORE_DEFAULT, "Default" },
	};
	const char bcma_device_name(struct bcma_device_id id)
	{
	int i;

	if (id->manuf == BCMA_MANUF_BCM) {
	for (i = 0; i < ARRAY_SIZE(bcma_device_names); i++) {
	if (bcma_device_names[i].id == id->id)
	return bcma_device_names[i].name;
	}
	}
	return "UNKNOWN";
	}

	static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx,
	u16 offset)
	{
	return readl(bus->mmio + offset);
	}

	static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
	{
	if (bus->hosttype == BCMA_HOSTTYPE_PCI)
	pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
	addr);
	}

	static u32 bcma_erom_get_ent(struct bcma_bus bus, u32 *eromptr)
	{
	u32 ent = readl(*eromptr);
	(*eromptr)++;
	return ent;
	}

	static void bcma_erom_push_ent(u32 **eromptr)
	{
	(*eromptr)--;
	}

	static s32 bcma_erom_get_ci(struct bcma_bus bus, u32 *eromptr)
	{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	if (!(ent & SCAN_ER_VALID))
	return -ENOENT;
	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
	return -ENOENT;
	return ent;
	}

	static bool bcma_erom_is_end(struct bcma_bus bus, u32 *eromptr)
	{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	bcma_erom_push_ent(eromptr);
	return (ent == (SCAN_ER_TAG_END \| SCAN_ER_VALID));
	}

	static bool bcma_erom_is_bridge(struct bcma_bus bus, u32 *eromptr)
	{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	bcma_erom_push_ent(eromptr);
	return (((ent & SCAN_ER_VALID)) &&
	((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
	((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
	}

	static void bcma_erom_skip_component(struct bcma_bus bus, u32 *eromptr)
	{
	u32 ent;
	while (1) {
	ent = bcma_erom_get_ent(bus, eromptr);
	if ((ent & SCAN_ER_VALID) &&
	((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
	break;
	if (ent == (SCAN_ER_TAG_END \| SCAN_ER_VALID))
	break;
	}
	bcma_erom_push_ent(eromptr);
	}

	static s32 bcma_erom_get_mst_port(struct bcma_bus bus, u32 *eromptr)
	{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	if (!(ent & SCAN_ER_VALID))
	return -ENOENT;
	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
	return -ENOENT;
	return ent;
	}

	static s32 bcma_erom_get_addr_desc(struct bcma_bus bus, u32 *eromptr,
	u32 type, u8 port)
	{
	u32 addrl, addrh, sizel, sizeh = 0;
	u32 size;

	u32 ent = bcma_erom_get_ent(bus, eromptr);
	if ((!(ent & SCAN_ER_VALID)) \|\|
	((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) \|\|
	((ent & SCAN_ADDR_TYPE) != type) \|\|
	(((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
	bcma_erom_push_ent(eromptr);
	return -EINVAL;
	}

	addrl = ent & SCAN_ADDR_ADDR;
	if (ent & SCAN_ADDR_AG32)
	addrh = bcma_erom_get_ent(bus, eromptr);
	else
	addrh = 0;

	if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
	size = bcma_erom_get_ent(bus, eromptr);
	sizel = size & SCAN_SIZE_SZ;
	if (size & SCAN_SIZE_SG32)
	sizeh = bcma_erom_get_ent(bus, eromptr);
	} else
	sizel = SCAN_ADDR_SZ_BASE <<
	((ent & SCAN_ADDR_SZ) >> SCAN_ADDR_SZ_SHIFT);

	return addrl;
	}

	static struct bcma_device bcma_find_core_by_index(struct bcma_bus bus,
	u16 index)
	{
	struct bcma_device *core;

	list_for_each_entry(core, &bus->cores, list) {
	if (core->core_index == index)
	return core;
	}
	return NULL;
	}

	static int bcma_get_next_core(struct bcma_bus bus, u32 __iomem *eromptr,
	struct bcma_device_id *match, int core_num,
	struct bcma_device *core)
	{
	s32 tmp;
	u8 i, j;
	s32 cia, cib;
	u8 ports[2], wrappers[2];

	/* get CIs */
	cia = bcma_erom_get_ci(bus, eromptr);
	if (cia < 0) {
	bcma_erom_push_ent(eromptr);
	if (bcma_erom_is_end(bus, eromptr))
	return -ESPIPE;
	return -EILSEQ;
	}
	cib = bcma_erom_get_ci(bus, eromptr);
	if (cib < 0)
	return -EILSEQ;

	/* parse CIs */
	core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
	core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
	core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
	ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
	ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
	wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
	wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
	core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;

	if (((core->id.manuf == BCMA_MANUF_ARM) &&
	(core->id.id == 0xFFF)) \|\|
	(ports[1] == 0)) {
	bcma_erom_skip_component(bus, eromptr);
	return -ENXIO;
	}

	/* check if component is a core at all */
	if (wrappers[0] + wrappers[1] == 0) {
	/* we could save addrl of the router
	if (cid == BCMA_CORE_OOB_ROUTER)
	*/
	bcma_erom_skip_component(bus, eromptr);
	return -ENXIO;
	}

	if (bcma_erom_is_bridge(bus, eromptr)) {
	bcma_erom_skip_component(bus, eromptr);
	return -ENXIO;
	}

	if (bcma_find_core_by_index(bus, core_num)) {
	bcma_erom_skip_component(bus, eromptr);
	return -ENODEV;
	}

	if (match && ((match->manuf != BCMA_ANY_MANUF &&
	match->manuf != core->id.manuf) \|\|
	(match->id != BCMA_ANY_ID && match->id != core->id.id) \|\|
	(match->rev != BCMA_ANY_REV && match->rev != core->id.rev) \|\|
	(match->class != BCMA_ANY_CLASS && match->class != core->id.class)
	)) {
	bcma_erom_skip_component(bus, eromptr);
	return -ENODEV;
	}

	/* get & parse master ports */
	for (i = 0; i < ports[0]; i++) {
	s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
	if (mst_port_d < 0)
	return -EILSEQ;
	}

	/* get & parse slave ports */
	for (i = 0; i < ports[1]; i++) {
	for (j = 0; ; j++) {
	tmp = bcma_erom_get_addr_desc(bus, eromptr,
	SCAN_ADDR_TYPE_SLAVE, i);
	if (tmp < 0) {
	/* no more entries for port _i_ */
	/* pr_debug("erom: slave port %d "
	* "has %d descriptors\n", i, j); */
	break;
	} else {
	if (i == 0 && j == 0)
	core->addr = tmp;
	}
	}
	}

	/* get & parse master wrappers */
	for (i = 0; i < wrappers[0]; i++) {
	for (j = 0; ; j++) {
	tmp = bcma_erom_get_addr_desc(bus, eromptr,
	SCAN_ADDR_TYPE_MWRAP, i);
	if (tmp < 0) {
	/* no more entries for port _i_ */
	/* pr_debug("erom: master wrapper %d "
	* "has %d descriptors\n", i, j); */
	break;
	} else {
	if (i == 0 && j == 0)
	core->wrap = tmp;
	}
	}
	}

	/* get & parse slave wrappers */
	for (i = 0; i < wrappers[1]; i++) {
	u8 hack = (ports[1] == 1) ? 0 : 1;
	for (j = 0; ; j++) {
	tmp = bcma_erom_get_addr_desc(bus, eromptr,
	SCAN_ADDR_TYPE_SWRAP, i + hack);
	if (tmp < 0) {
	/* no more entries for port _i_ */
	/* pr_debug("erom: master wrapper %d "
	* has %d descriptors\n", i, j); */
	break;
	} else {
	if (wrappers[0] == 0 && !i && !j)
	core->wrap = tmp;
	}
	}
	}
	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
	core->io_addr = ioremap_nocache(core->addr, BCMA_CORE_SIZE);
	if (!core->io_addr)
	return -ENOMEM;
	core->io_wrap = ioremap_nocache(core->wrap, BCMA_CORE_SIZE);
	if (!core->io_wrap) {
	iounmap(core->io_addr);
	return -ENOMEM;
	}
	}
	return 0;
	}

	void bcma_init_bus(struct bcma_bus *bus)
	{
	s32 tmp;

	if (bus->init_done)
	return;

	INIT_LIST_HEAD(&bus->cores);
	bus->nr_cores = 0;

	bcma_scan_switch_core(bus, BCMA_ADDR_BASE);

	tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
	bus->chipinfo.id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
	bus->chipinfo.rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
	bus->chipinfo.pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
	bus->init_done = true;
	}

	int bcma_bus_scan(struct bcma_bus *bus)
	{
	u32 erombase;
	u32 __iomem eromptr, eromend;

	int err, core_num = 0;

	bcma_init_bus(bus);

	erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
	eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
	if (!eromptr)
	return -ENOMEM;
	} else {
	eromptr = bus->mmio;
	}

	eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);

	bcma_scan_switch_core(bus, erombase);

	while (eromptr < eromend) {
	struct bcma_device core = kzalloc(sizeof(core), GFP_KERNEL);
	if (!core)
	return -ENOMEM;
	INIT_LIST_HEAD(&core->list);
	core->bus = bus;

	err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
	if (err < 0) {
	kfree(core);
	if (err == -ENODEV) {
	core_num++;
	continue;
	} else if (err == -ENXIO) {
	continue;
	} else if (err == -ESPIPE) {
	break;
	}
	return err;
	}

	core->core_index = core_num++;
	bus->nr_cores++;

	pr_info("Core %d found: %s "
	"(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
	core->core_index, bcma_device_name(&core->id),
	core->id.manuf, core->id.id, core->id.rev,
	core->id.class);

	list_add(&core->list, &bus->cores);
	}

	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
	iounmap(eromptr);

	return 0;
	}

	int __init bcma_bus_scan_early(struct bcma_bus *bus,
	struct bcma_device_id *match,
	struct bcma_device *core)
	{
	u32 erombase;
	u32 __iomem eromptr, eromend;

	int err = -ENODEV;
	int core_num = 0;

	erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
	eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
	if (!eromptr)
	return -ENOMEM;
	} else {
	eromptr = bus->mmio;
	}

	eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);

	bcma_scan_switch_core(bus, erombase);

	while (eromptr < eromend) {
	memset(core, 0, sizeof(*core));
	INIT_LIST_HEAD(&core->list);
	core->bus = bus;

	err = bcma_get_next_core(bus, &eromptr, match, core_num, core);
	if (err == -ENODEV) {
	core_num++;
	continue;
	} else if (err == -ENXIO)
	continue;
	else if (err == -ESPIPE)
	break;
	else if (err < 0)
	return err;

	core->core_index = core_num++;
	bus->nr_cores++;
	pr_info("Core %d found: %s "
	"(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
	core->core_index, bcma_device_name(&core->id),
	core->id.manuf, core->id.id, core->id.rev,
	core->id.class);

	list_add(&core->list, &bus->cores);
	err = 0;
	break;
	}

	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
	iounmap(eromptr);

	return err;
	}