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-rw-r--r--drivers/ssb/scan.c413
1 files changed, 413 insertions, 0 deletions
diff --git a/drivers/ssb/scan.c b/drivers/ssb/scan.c
new file mode 100644
index 000000000000..96258c60919d
--- /dev/null
+++ b/drivers/ssb/scan.c
@@ -0,0 +1,413 @@
+/*
+ * Sonics Silicon Backplane
+ * Bus scanning
+ *
+ * Copyright (C) 2005-2007 Michael Buesch <mb@bu3sch.de>
+ * Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
+ * Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
+ * Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
+ * Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
+ * Copyright (C) 2006 Broadcom Corporation.
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/ssb/ssb.h>
+#include <linux/ssb/ssb_regs.h>
+#include <linux/pci.h>
+#include <linux/io.h>
+
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include "ssb_private.h"
+
+
+const char *ssb_core_name(u16 coreid)
+{
+ switch (coreid) {
+ case SSB_DEV_CHIPCOMMON:
+ return "ChipCommon";
+ case SSB_DEV_ILINE20:
+ return "ILine 20";
+ case SSB_DEV_SDRAM:
+ return "SDRAM";
+ case SSB_DEV_PCI:
+ return "PCI";
+ case SSB_DEV_MIPS:
+ return "MIPS";
+ case SSB_DEV_ETHERNET:
+ return "Fast Ethernet";
+ case SSB_DEV_V90:
+ return "V90";
+ case SSB_DEV_USB11_HOSTDEV:
+ return "USB 1.1 Hostdev";
+ case SSB_DEV_ADSL:
+ return "ADSL";
+ case SSB_DEV_ILINE100:
+ return "ILine 100";
+ case SSB_DEV_IPSEC:
+ return "IPSEC";
+ case SSB_DEV_PCMCIA:
+ return "PCMCIA";
+ case SSB_DEV_INTERNAL_MEM:
+ return "Internal Memory";
+ case SSB_DEV_MEMC_SDRAM:
+ return "MEMC SDRAM";
+ case SSB_DEV_EXTIF:
+ return "EXTIF";
+ case SSB_DEV_80211:
+ return "IEEE 802.11";
+ case SSB_DEV_MIPS_3302:
+ return "MIPS 3302";
+ case SSB_DEV_USB11_HOST:
+ return "USB 1.1 Host";
+ case SSB_DEV_USB11_DEV:
+ return "USB 1.1 Device";
+ case SSB_DEV_USB20_HOST:
+ return "USB 2.0 Host";
+ case SSB_DEV_USB20_DEV:
+ return "USB 2.0 Device";
+ case SSB_DEV_SDIO_HOST:
+ return "SDIO Host";
+ case SSB_DEV_ROBOSWITCH:
+ return "Roboswitch";
+ case SSB_DEV_PARA_ATA:
+ return "PATA";
+ case SSB_DEV_SATA_XORDMA:
+ return "SATA XOR-DMA";
+ case SSB_DEV_ETHERNET_GBIT:
+ return "GBit Ethernet";
+ case SSB_DEV_PCIE:
+ return "PCI-E";
+ case SSB_DEV_MIMO_PHY:
+ return "MIMO PHY";
+ case SSB_DEV_SRAM_CTRLR:
+ return "SRAM Controller";
+ case SSB_DEV_MINI_MACPHY:
+ return "Mini MACPHY";
+ case SSB_DEV_ARM_1176:
+ return "ARM 1176";
+ case SSB_DEV_ARM_7TDMI:
+ return "ARM 7TDMI";
+ }
+ return "UNKNOWN";
+}
+
+static u16 pcidev_to_chipid(struct pci_dev *pci_dev)
+{
+ u16 chipid_fallback = 0;
+
+ switch (pci_dev->device) {
+ case 0x4301:
+ chipid_fallback = 0x4301;
+ break;
+ case 0x4305 ... 0x4307:
+ chipid_fallback = 0x4307;
+ break;
+ case 0x4403:
+ chipid_fallback = 0x4402;
+ break;
+ case 0x4610 ... 0x4615:
+ chipid_fallback = 0x4610;
+ break;
+ case 0x4710 ... 0x4715:
+ chipid_fallback = 0x4710;
+ break;
+ case 0x4320 ... 0x4325:
+ chipid_fallback = 0x4309;
+ break;
+ case PCI_DEVICE_ID_BCM4401:
+ case PCI_DEVICE_ID_BCM4401B0:
+ case PCI_DEVICE_ID_BCM4401B1:
+ chipid_fallback = 0x4401;
+ break;
+ default:
+ ssb_printk(KERN_ERR PFX
+ "PCI-ID not in fallback list\n");
+ }
+
+ return chipid_fallback;
+}
+
+static u8 chipid_to_nrcores(u16 chipid)
+{
+ switch (chipid) {
+ case 0x5365:
+ return 7;
+ case 0x4306:
+ return 6;
+ case 0x4310:
+ return 8;
+ case 0x4307:
+ case 0x4301:
+ return 5;
+ case 0x4401:
+ case 0x4402:
+ return 3;
+ case 0x4710:
+ case 0x4610:
+ case 0x4704:
+ return 9;
+ default:
+ ssb_printk(KERN_ERR PFX
+ "CHIPID not in nrcores fallback list\n");
+ }
+
+ return 1;
+}
+
+static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
+ u16 offset)
+{
+ switch (bus->bustype) {
+ case SSB_BUSTYPE_SSB:
+ offset += current_coreidx * SSB_CORE_SIZE;
+ break;
+ case SSB_BUSTYPE_PCI:
+ break;
+ case SSB_BUSTYPE_PCMCIA:
+ if (offset >= 0x800) {
+ ssb_pcmcia_switch_segment(bus, 1);
+ offset -= 0x800;
+ } else
+ ssb_pcmcia_switch_segment(bus, 0);
+ break;
+ }
+ return readl(bus->mmio + offset);
+}
+
+static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
+{
+ switch (bus->bustype) {
+ case SSB_BUSTYPE_SSB:
+ break;
+ case SSB_BUSTYPE_PCI:
+ return ssb_pci_switch_coreidx(bus, coreidx);
+ case SSB_BUSTYPE_PCMCIA:
+ return ssb_pcmcia_switch_coreidx(bus, coreidx);
+ }
+ return 0;
+}
+
+void ssb_iounmap(struct ssb_bus *bus)
+{
+ switch (bus->bustype) {
+ case SSB_BUSTYPE_SSB:
+ case SSB_BUSTYPE_PCMCIA:
+ iounmap(bus->mmio);
+ break;
+ case SSB_BUSTYPE_PCI:
+#ifdef CONFIG_SSB_PCIHOST
+ pci_iounmap(bus->host_pci, bus->mmio);
+#else
+ SSB_BUG_ON(1); /* Can't reach this code. */
+#endif
+ break;
+ }
+ bus->mmio = NULL;
+ bus->mapped_device = NULL;
+}
+
+static void __iomem *ssb_ioremap(struct ssb_bus *bus,
+ unsigned long baseaddr)
+{
+ void __iomem *mmio = NULL;
+
+ switch (bus->bustype) {
+ case SSB_BUSTYPE_SSB:
+ /* Only map the first core for now. */
+ /* fallthrough... */
+ case SSB_BUSTYPE_PCMCIA:
+ mmio = ioremap(baseaddr, SSB_CORE_SIZE);
+ break;
+ case SSB_BUSTYPE_PCI:
+#ifdef CONFIG_SSB_PCIHOST
+ mmio = pci_iomap(bus->host_pci, 0, ~0UL);
+#else
+ SSB_BUG_ON(1); /* Can't reach this code. */
+#endif
+ break;
+ }
+
+ return mmio;
+}
+
+static int we_support_multiple_80211_cores(struct ssb_bus *bus)
+{
+ /* More than one 802.11 core is only supported by special chips.
+ * There are chips with two 802.11 cores, but with dangling
+ * pins on the second core. Be careful and reject them here.
+ */
+
+#ifdef CONFIG_SSB_PCIHOST
+ if (bus->bustype == SSB_BUSTYPE_PCI) {
+ if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
+ bus->host_pci->device == 0x4324)
+ return 1;
+ }
+#endif /* CONFIG_SSB_PCIHOST */
+ return 0;
+}
+
+int ssb_bus_scan(struct ssb_bus *bus,
+ unsigned long baseaddr)
+{
+ int err = -ENOMEM;
+ void __iomem *mmio;
+ u32 idhi, cc, rev, tmp;
+ int dev_i, i;
+ struct ssb_device *dev;
+ int nr_80211_cores = 0;
+
+ mmio = ssb_ioremap(bus, baseaddr);
+ if (!mmio)
+ goto out;
+ bus->mmio = mmio;
+
+ err = scan_switchcore(bus, 0); /* Switch to first core */
+ if (err)
+ goto err_unmap;
+
+ idhi = scan_read32(bus, 0, SSB_IDHIGH);
+ cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
+ rev = (idhi & SSB_IDHIGH_RCLO);
+ rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
+
+ bus->nr_devices = 0;
+ if (cc == SSB_DEV_CHIPCOMMON) {
+ tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID);
+
+ bus->chip_id = (tmp & SSB_CHIPCO_IDMASK);
+ bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >>
+ SSB_CHIPCO_REVSHIFT;
+ bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >>
+ SSB_CHIPCO_PACKSHIFT;
+ if (rev >= 4) {
+ bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >>
+ SSB_CHIPCO_NRCORESSHIFT;
+ }
+ tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP);
+ bus->chipco.capabilities = tmp;
+ } else {
+ if (bus->bustype == SSB_BUSTYPE_PCI) {
+ bus->chip_id = pcidev_to_chipid(bus->host_pci);
+ pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
+ &bus->chip_rev);
+ bus->chip_package = 0;
+ } else {
+ bus->chip_id = 0x4710;
+ bus->chip_rev = 0;
+ bus->chip_package = 0;
+ }
+ }
+ if (!bus->nr_devices)
+ bus->nr_devices = chipid_to_nrcores(bus->chip_id);
+ if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
+ ssb_printk(KERN_ERR PFX
+ "More than %d ssb cores found (%d)\n",
+ SSB_MAX_NR_CORES, bus->nr_devices);
+ goto err_unmap;
+ }
+ if (bus->bustype == SSB_BUSTYPE_SSB) {
+ /* Now that we know the number of cores,
+ * remap the whole IO space for all cores.
+ */
+ err = -ENOMEM;
+ iounmap(mmio);
+ mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices);
+ if (!mmio)
+ goto out;
+ bus->mmio = mmio;
+ }
+
+ /* Fetch basic information about each core/device */
+ for (i = 0, dev_i = 0; i < bus->nr_devices; i++) {
+ err = scan_switchcore(bus, i);
+ if (err)
+ goto err_unmap;
+ dev = &(bus->devices[dev_i]);
+
+ idhi = scan_read32(bus, i, SSB_IDHIGH);
+ dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
+ dev->id.revision = (idhi & SSB_IDHIGH_RCLO);
+ dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
+ dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT;
+ dev->core_index = i;
+ dev->bus = bus;
+ dev->ops = bus->ops;
+
+ ssb_dprintk(KERN_INFO PFX
+ "Core %d found: %s "
+ "(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
+ i, ssb_core_name(dev->id.coreid),
+ dev->id.coreid, dev->id.revision, dev->id.vendor);
+
+ switch (dev->id.coreid) {
+ case SSB_DEV_80211:
+ nr_80211_cores++;
+ if (nr_80211_cores > 1) {
+ if (!we_support_multiple_80211_cores(bus)) {
+ ssb_dprintk(KERN_INFO PFX "Ignoring additional "
+ "802.11 core\n");
+ continue;
+ }
+ }
+ break;
+ case SSB_DEV_EXTIF:
+#ifdef CONFIG_SSB_DRIVER_EXTIF
+ if (bus->extif.dev) {
+ ssb_printk(KERN_WARNING PFX
+ "WARNING: Multiple EXTIFs found\n");
+ break;
+ }
+ bus->extif.dev = dev;
+#endif /* CONFIG_SSB_DRIVER_EXTIF */
+ break;
+ case SSB_DEV_CHIPCOMMON:
+ if (bus->chipco.dev) {
+ ssb_printk(KERN_WARNING PFX
+ "WARNING: Multiple ChipCommon found\n");
+ break;
+ }
+ bus->chipco.dev = dev;
+ break;
+ case SSB_DEV_MIPS:
+ case SSB_DEV_MIPS_3302:
+#ifdef CONFIG_SSB_DRIVER_MIPS
+ if (bus->mipscore.dev) {
+ ssb_printk(KERN_WARNING PFX
+ "WARNING: Multiple MIPS cores found\n");
+ break;
+ }
+ bus->mipscore.dev = dev;
+#endif /* CONFIG_SSB_DRIVER_MIPS */
+ break;
+ case SSB_DEV_PCI:
+ case SSB_DEV_PCIE:
+#ifdef CONFIG_SSB_DRIVER_PCICORE
+ if (bus->pcicore.dev) {
+ ssb_printk(KERN_WARNING PFX
+ "WARNING: Multiple PCI(E) cores found\n");
+ break;
+ }
+ bus->pcicore.dev = dev;
+#endif /* CONFIG_SSB_DRIVER_PCICORE */
+ break;
+ default:
+ break;
+ }
+
+ dev_i++;
+ }
+ bus->nr_devices = dev_i;
+
+ err = 0;
+out:
+ return err;
+err_unmap:
+ ssb_iounmap(bus);
+ goto out;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 11:56:06 +0100