linux/drivers/bcma/scan.c
Rafał Miłecki dc8ecdd3a3 bcma: move bus struct setup into early part of host specific code
This change is important for SoC host. In future we will want to know
chip ID (needed for early MIPS boot) before doing cores scanning.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2014-09-09 15:27:18 -04:00

576 lines
15 KiB
C

/*
* 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;
};
static const struct bcma_device_id_name bcma_arm_device_names[] = {
{ BCMA_CORE_4706_MAC_GBIT_COMMON, "BCM4706 GBit MAC Common" },
{ BCMA_CORE_ARM_1176, "ARM 1176" },
{ BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
{ BCMA_CORE_ARM_CM3, "ARM CM3" },
};
static const struct bcma_device_id_name bcma_bcm_device_names[] = {
{ BCMA_CORE_OOB_ROUTER, "OOB Router" },
{ BCMA_CORE_4706_CHIPCOMMON, "BCM4706 ChipCommon" },
{ BCMA_CORE_4706_SOC_RAM, "BCM4706 SOC RAM" },
{ BCMA_CORE_4706_MAC_GBIT, "BCM4706 GBit MAC" },
{ BCMA_CORE_NS_PCIEG2, "PCIe Gen 2" },
{ BCMA_CORE_NS_DMA, "DMA" },
{ BCMA_CORE_NS_SDIO3, "SDIO3" },
{ BCMA_CORE_NS_USB20, "USB 2.0" },
{ BCMA_CORE_NS_USB30, "USB 3.0" },
{ BCMA_CORE_NS_A9JTAG, "ARM Cortex A9 JTAG" },
{ BCMA_CORE_NS_DDR23, "Denali DDR2/DDR3 memory controller" },
{ BCMA_CORE_NS_ROM, "ROM" },
{ BCMA_CORE_NS_NAND, "NAND flash controller" },
{ BCMA_CORE_NS_QSPI, "SPI flash controller" },
{ BCMA_CORE_NS_CHIPCOMMON_B, "Chipcommon B" },
{ BCMA_CORE_ARMCA9, "ARM Cortex A9 core (ihost)" },
{ BCMA_CORE_AMEMC, "AMEMC (DDR)" },
{ BCMA_CORE_ALTA, "ALTA (I2S)" },
{ 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_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_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_PHY_LP, "PHY LP" },
{ BCMA_CORE_PMU, "PMU" },
{ BCMA_CORE_PHY_SSN, "PHY SSN" },
{ BCMA_CORE_SDIO_DEV, "SDIO Device" },
{ BCMA_CORE_PHY_HT, "PHY HT" },
{ 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_PCIE2, "PCIe Gen2" },
{ BCMA_CORE_ARM_CR4, "ARM CR4" },
{ BCMA_CORE_DEFAULT, "Default" },
};
static const struct bcma_device_id_name bcma_mips_device_names[] = {
{ BCMA_CORE_MIPS, "MIPS" },
{ BCMA_CORE_MIPS_3302, "MIPS 3302" },
{ BCMA_CORE_MIPS_74K, "MIPS 74K" },
};
static const char *bcma_device_name(const struct bcma_device_id *id)
{
const struct bcma_device_id_name *names;
int size, i;
/* search manufacturer specific names */
switch (id->manuf) {
case BCMA_MANUF_ARM:
names = bcma_arm_device_names;
size = ARRAY_SIZE(bcma_arm_device_names);
break;
case BCMA_MANUF_BCM:
names = bcma_bcm_device_names;
size = ARRAY_SIZE(bcma_bcm_device_names);
break;
case BCMA_MANUF_MIPS:
names = bcma_mips_device_names;
size = ARRAY_SIZE(bcma_mips_device_names);
break;
default:
return "UNKNOWN";
}
for (i = 0; i < size; i++) {
if (names[i].id == id->id)
return 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 __iomem **eromptr)
{
u32 ent = readl(*eromptr);
(*eromptr)++;
return ent;
}
static void bcma_erom_push_ent(u32 __iomem **eromptr)
{
(*eromptr)--;
}
static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 __iomem **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 __iomem **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 __iomem **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 __iomem **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 __iomem **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 u32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 __iomem **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 (u32)-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 struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid)
{
struct bcma_device *core;
list_for_each_entry_reverse(core, &bus->cores, list) {
if (core->id.id == coreid)
return core;
}
return NULL;
}
#define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO)
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)
{
u32 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) {
/* Some specific cores don't need wrappers */
switch (core->id.id) {
case BCMA_CORE_4706_MAC_GBIT_COMMON:
/* Not used yet: case BCMA_CORE_OOB_ROUTER: */
break;
default:
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;
}
/* First Slave Address Descriptor should be port 0:
* the main register space for the core
*/
tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
/* Try again to see if it is a bridge */
tmp = bcma_erom_get_addr_desc(bus, eromptr,
SCAN_ADDR_TYPE_BRIDGE, 0);
if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
return -EILSEQ;
} else {
bcma_info(bus, "Bridge found\n");
return -ENXIO;
}
}
core->addr = tmp;
/* 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 (IS_ERR_VALUE_U32(tmp)) {
/* 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->addr1 = 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 (IS_ERR_VALUE_U32(tmp)) {
/* 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 (IS_ERR_VALUE_U32(tmp)) {
/* 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;
if (core->wrap) {
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;
struct bcma_chipinfo *chipinfo = &(bus->chipinfo);
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);
chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
bcma_info(bus, "Found chip with id 0x%04X, rev 0x%02X and package 0x%02X\n",
chipinfo->id, chipinfo->rev, chipinfo->pkg);
}
int bcma_bus_scan(struct bcma_bus *bus)
{
u32 erombase;
u32 __iomem *eromptr, *eromend;
int err, 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) {
struct bcma_device *other_core;
struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
if (!core) {
err = -ENOMEM;
goto out;
}
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;
}
goto out;
}
core->core_index = core_num++;
bus->nr_cores++;
other_core = bcma_find_core_reverse(bus, core->id.id);
core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1;
bcma_info(bus, "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_tail(&core->list, &bus->cores);
}
err = 0;
out:
if (bus->hosttype == BCMA_HOSTTYPE_SOC)
iounmap(eromptr);
return err;
}
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)
goto out;
core->core_index = core_num++;
bus->nr_cores++;
bcma_info(bus, "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_tail(&core->list, &bus->cores);
err = 0;
break;
}
out:
if (bus->hosttype == BCMA_HOSTTYPE_SOC)
iounmap(eromptr);
return err;
}