diff options
Diffstat (limited to 'drivers/parisc/dino.c')
| -rw-r--r-- | drivers/parisc/dino.c | 1094 |
1 files changed, 1094 insertions, 0 deletions
diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c new file mode 100644 index 000000000..e33036281 --- /dev/null +++ b/drivers/parisc/dino.c @@ -0,0 +1,1094 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* +** DINO manager +** +** (c) Copyright 1999 Red Hat Software +** (c) Copyright 1999 SuSE GmbH +** (c) Copyright 1999,2000 Hewlett-Packard Company +** (c) Copyright 2000 Grant Grundler +** (c) Copyright 2006-2019 Helge Deller +** +** +** This module provides access to Dino PCI bus (config/IOport spaces) +** and helps manage Dino IRQ lines. +** +** Dino interrupt handling is a bit complicated. +** Dino always writes to the broadcast EIR via irr0 for now. +** (BIG WARNING: using broadcast EIR is a really bad thing for SMP!) +** Only one processor interrupt is used for the 11 IRQ line +** inputs to dino. +** +** The different between Built-in Dino and Card-Mode +** dino is in chip initialization and pci device initialization. +** +** Linux drivers can only use Card-Mode Dino if pci devices I/O port +** BARs are configured and used by the driver. Programming MMIO address +** requires substantial knowledge of available Host I/O address ranges +** is currently not supported. Port/Config accessor functions are the +** same. "BIOS" differences are handled within the existing routines. +*/ + +/* Changes : +** 2001-06-14 : Clement Moyroud (moyroudc@esiee.fr) +** - added support for the integrated RS232. +*/ + +/* +** TODO: create a virtual address for each Dino HPA. +** GSC code might be able to do this since IODC data tells us +** how many pages are used. PCI subsystem could (must?) do this +** for PCI drivers devices which implement/use MMIO registers. +*/ + +#include <linux/delay.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/interrupt.h> /* for struct irqaction */ +#include <linux/spinlock.h> /* for spinlock_t and prototypes */ + +#include <asm/pdc.h> +#include <asm/page.h> +#include <asm/io.h> +#include <asm/hardware.h> + +#include "gsc.h" +#include "iommu.h" + +#undef DINO_DEBUG + +#ifdef DINO_DEBUG +#define DBG(x...) printk(x) +#else +#define DBG(x...) +#endif + +/* +** Config accessor functions only pass in the 8-bit bus number +** and not the 8-bit "PCI Segment" number. Each Dino will be +** assigned a PCI bus number based on "when" it's discovered. +** +** The "secondary" bus number is set to this before calling +** pci_scan_bus(). If any PPB's are present, the scan will +** discover them and update the "secondary" and "subordinate" +** fields in Dino's pci_bus structure. +** +** Changes in the configuration *will* result in a different +** bus number for each dino. +*/ + +#define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA) +#define is_cujo(id) ((id)->hversion == 0x682) + +#define DINO_IAR0 0x004 +#define DINO_IODC_ADDR 0x008 +#define DINO_IODC_DATA_0 0x008 +#define DINO_IODC_DATA_1 0x008 +#define DINO_IRR0 0x00C +#define DINO_IAR1 0x010 +#define DINO_IRR1 0x014 +#define DINO_IMR 0x018 +#define DINO_IPR 0x01C +#define DINO_TOC_ADDR 0x020 +#define DINO_ICR 0x024 +#define DINO_ILR 0x028 +#define DINO_IO_COMMAND 0x030 +#define DINO_IO_STATUS 0x034 +#define DINO_IO_CONTROL 0x038 +#define DINO_IO_GSC_ERR_RESP 0x040 +#define DINO_IO_ERR_INFO 0x044 +#define DINO_IO_PCI_ERR_RESP 0x048 +#define DINO_IO_FBB_EN 0x05c +#define DINO_IO_ADDR_EN 0x060 +#define DINO_PCI_ADDR 0x064 +#define DINO_CONFIG_DATA 0x068 +#define DINO_IO_DATA 0x06c +#define DINO_MEM_DATA 0x070 /* Dino 3.x only */ +#define DINO_GSC2X_CONFIG 0x7b4 +#define DINO_GMASK 0x800 +#define DINO_PAMR 0x804 +#define DINO_PAPR 0x808 +#define DINO_DAMODE 0x80c +#define DINO_PCICMD 0x810 +#define DINO_PCISTS 0x814 +#define DINO_MLTIM 0x81c +#define DINO_BRDG_FEAT 0x820 +#define DINO_PCIROR 0x824 +#define DINO_PCIWOR 0x828 +#define DINO_TLTIM 0x830 + +#define DINO_IRQS 11 /* bits 0-10 are architected */ +#define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */ +#define DINO_LOCAL_IRQS (DINO_IRQS+1) + +#define DINO_MASK_IRQ(x) (1<<(x)) + +#define PCIINTA 0x001 +#define PCIINTB 0x002 +#define PCIINTC 0x004 +#define PCIINTD 0x008 +#define PCIINTE 0x010 +#define PCIINTF 0x020 +#define GSCEXTINT 0x040 +/* #define xxx 0x080 - bit 7 is "default" */ +/* #define xxx 0x100 - bit 8 not used */ +/* #define xxx 0x200 - bit 9 not used */ +#define RS232INT 0x400 + +struct dino_device +{ + struct pci_hba_data hba; /* 'C' inheritance - must be first */ + spinlock_t dinosaur_pen; + u32 imr; /* IRQ's which are enabled */ + struct gsc_irq gsc_irq; + int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */ +#ifdef DINO_DEBUG + unsigned int dino_irr0; /* save most recent IRQ line stat */ +#endif +}; + +static inline struct dino_device *DINO_DEV(struct pci_hba_data *hba) +{ + return container_of(hba, struct dino_device, hba); +} + +/* + * Dino Configuration Space Accessor Functions + */ + +#define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos))) + +/* + * keep the current highest bus count to assist in allocating busses. This + * tries to keep a global bus count total so that when we discover an + * entirely new bus, it can be given a unique bus number. + */ +static int dino_current_bus = 0; + +static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 *val) +{ + struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); + u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start; + u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); + void __iomem *base_addr = d->hba.base_addr; + unsigned long flags; + + DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, + size); + spin_lock_irqsave(&d->dinosaur_pen, flags); + + /* tell HW which CFG address */ + __raw_writel(v, base_addr + DINO_PCI_ADDR); + + /* generate cfg read cycle */ + if (size == 1) { + *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3)); + } else if (size == 2) { + *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2)); + } else if (size == 4) { + *val = readl(base_addr + DINO_CONFIG_DATA); + } + + spin_unlock_irqrestore(&d->dinosaur_pen, flags); + return 0; +} + +/* + * Dino address stepping "feature": + * When address stepping, Dino attempts to drive the bus one cycle too soon + * even though the type of cycle (config vs. MMIO) might be different. + * The read of Ven/Prod ID is harmless and avoids Dino's address stepping. + */ +static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 val) +{ + struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); + u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start; + u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); + void __iomem *base_addr = d->hba.base_addr; + unsigned long flags; + + DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, + size); + spin_lock_irqsave(&d->dinosaur_pen, flags); + + /* avoid address stepping feature */ + __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR); + __raw_readl(base_addr + DINO_CONFIG_DATA); + + /* tell HW which CFG address */ + __raw_writel(v, base_addr + DINO_PCI_ADDR); + /* generate cfg read cycle */ + if (size == 1) { + writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3)); + } else if (size == 2) { + writew(val, base_addr + DINO_CONFIG_DATA + (where & 2)); + } else if (size == 4) { + writel(val, base_addr + DINO_CONFIG_DATA); + } + + spin_unlock_irqrestore(&d->dinosaur_pen, flags); + return 0; +} + +static struct pci_ops dino_cfg_ops = { + .read = dino_cfg_read, + .write = dino_cfg_write, +}; + + +/* + * Dino "I/O Port" Space Accessor Functions + * + * Many PCI devices don't require use of I/O port space (eg Tulip, + * NCR720) since they export the same registers to both MMIO and + * I/O port space. Performance is going to stink if drivers use + * I/O port instead of MMIO. + */ + +#define DINO_PORT_IN(type, size, mask) \ +static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \ +{ \ + u##size v; \ + unsigned long flags; \ + spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ + /* tell HW which IO Port address */ \ + __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ + /* generate I/O PORT read cycle */ \ + v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \ + spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ + return v; \ +} + +DINO_PORT_IN(b, 8, 3) +DINO_PORT_IN(w, 16, 2) +DINO_PORT_IN(l, 32, 0) + +#define DINO_PORT_OUT(type, size, mask) \ +static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \ +{ \ + unsigned long flags; \ + spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ + /* tell HW which IO port address */ \ + __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ + /* generate cfg write cycle */ \ + write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \ + spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ +} + +DINO_PORT_OUT(b, 8, 3) +DINO_PORT_OUT(w, 16, 2) +DINO_PORT_OUT(l, 32, 0) + +static struct pci_port_ops dino_port_ops = { + .inb = dino_in8, + .inw = dino_in16, + .inl = dino_in32, + .outb = dino_out8, + .outw = dino_out16, + .outl = dino_out32 +}; + +static void dino_mask_irq(struct irq_data *d) +{ + struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); + int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); + + DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq); + + /* Clear the matching bit in the IMR register */ + dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq)); + __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); +} + +static void dino_unmask_irq(struct irq_data *d) +{ + struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); + int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); + u32 tmp; + + DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq); + + /* + ** clear pending IRQ bits + ** + ** This does NOT change ILR state! + ** See comment below for ILR usage. + */ + __raw_readl(dino_dev->hba.base_addr+DINO_IPR); + + /* set the matching bit in the IMR register */ + dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */ + __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); + + /* Emulate "Level Triggered" Interrupt + ** Basically, a driver is blowing it if the IRQ line is asserted + ** while the IRQ is disabled. But tulip.c seems to do that.... + ** Give 'em a kluge award and a nice round of applause! + ** + ** The gsc_write will generate an interrupt which invokes dino_isr(). + ** dino_isr() will read IPR and find nothing. But then catch this + ** when it also checks ILR. + */ + tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR); + if (tmp & DINO_MASK_IRQ(local_irq)) { + DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n", + __func__, tmp); + gsc_writel(dino_dev->gsc_irq.txn_data, dino_dev->gsc_irq.txn_addr); + } +} + +#ifdef CONFIG_SMP +static int dino_set_affinity_irq(struct irq_data *d, const struct cpumask *dest, + bool force) +{ + struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); + struct cpumask tmask; + int cpu_irq; + u32 eim; + + if (!cpumask_and(&tmask, dest, cpu_online_mask)) + return -EINVAL; + + cpu_irq = cpu_check_affinity(d, &tmask); + if (cpu_irq < 0) + return cpu_irq; + + dino_dev->gsc_irq.txn_addr = txn_affinity_addr(d->irq, cpu_irq); + eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data; + __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); + + irq_data_update_effective_affinity(d, &tmask); + + return IRQ_SET_MASK_OK; +} +#endif + +static struct irq_chip dino_interrupt_type = { + .name = "GSC-PCI", + .irq_unmask = dino_unmask_irq, + .irq_mask = dino_mask_irq, +#ifdef CONFIG_SMP + .irq_set_affinity = dino_set_affinity_irq, +#endif +}; + + +/* + * Handle a Processor interrupt generated by Dino. + * + * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from + * wedging the CPU. Could be removed or made optional at some point. + */ +static irqreturn_t dino_isr(int irq, void *intr_dev) +{ + struct dino_device *dino_dev = intr_dev; + u32 mask; + int ilr_loop = 100; + + /* read and acknowledge pending interrupts */ +#ifdef DINO_DEBUG + dino_dev->dino_irr0 = +#endif + mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK; + + if (mask == 0) + return IRQ_NONE; + +ilr_again: + do { + int local_irq = __ffs(mask); + int irq = dino_dev->global_irq[local_irq]; + DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n", + __func__, irq, intr_dev, mask); + generic_handle_irq(irq); + mask &= ~DINO_MASK_IRQ(local_irq); + } while (mask); + + /* Support for level triggered IRQ lines. + ** + ** Dropping this support would make this routine *much* faster. + ** But since PCI requires level triggered IRQ line to share lines... + ** device drivers may assume lines are level triggered (and not + ** edge triggered like EISA/ISA can be). + */ + mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr; + if (mask) { + if (--ilr_loop > 0) + goto ilr_again; + pr_warn_ratelimited("Dino 0x%px: stuck interrupt %d\n", + dino_dev->hba.base_addr, mask); + } + return IRQ_HANDLED; +} + +static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp) +{ + int irq = gsc_assign_irq(&dino_interrupt_type, dino); + if (irq == NO_IRQ) + return; + + *irqp = irq; + dino->global_irq[local_irq] = irq; +} + +static void dino_choose_irq(struct parisc_device *dev, void *ctrl) +{ + int irq; + struct dino_device *dino = ctrl; + + switch (dev->id.sversion) { + case 0x00084: irq = 8; break; /* PS/2 */ + case 0x0008c: irq = 10; break; /* RS232 */ + case 0x00096: irq = 8; break; /* PS/2 */ + default: return; /* Unknown */ + } + + dino_assign_irq(dino, irq, &dev->irq); +} + + +/* + * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de) + * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...) + */ +static void quirk_cirrus_cardbus(struct pci_dev *dev) +{ + u8 new_irq = dev->irq - 1; + printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n", + pci_name(dev), dev->irq, new_irq); + dev->irq = new_irq; +} +DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus ); + +#ifdef CONFIG_TULIP +/* Check if PCI device is behind a Card-mode Dino. */ +static int pci_dev_is_behind_card_dino(struct pci_dev *dev) +{ + struct dino_device *dino_dev; + + dino_dev = DINO_DEV(parisc_walk_tree(dev->bus->bridge)); + return is_card_dino(&dino_dev->hba.dev->id); +} + +static void pci_fixup_tulip(struct pci_dev *dev) +{ + if (!pci_dev_is_behind_card_dino(dev)) + return; + if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) + return; + pr_warn("%s: HP HSC-PCI Cards with card-mode Dino not yet supported.\n", + pci_name(dev)); + /* Disable this card by zeroing the PCI resources */ + memset(&dev->resource[0], 0, sizeof(dev->resource[0])); + memset(&dev->resource[1], 0, sizeof(dev->resource[1])); +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_DEC, PCI_ANY_ID, pci_fixup_tulip); +#endif /* CONFIG_TULIP */ + +static void __init +dino_bios_init(void) +{ + DBG("dino_bios_init\n"); +} + +/* + * dino_card_setup - Set up the memory space for a Dino in card mode. + * @bus: the bus under this dino + * + * Claim an 8MB chunk of unused IO space and call the generic PCI routines + * to set up the addresses of the devices on this bus. + */ +#define _8MB 0x00800000UL +static void __init +dino_card_setup(struct pci_bus *bus, void __iomem *base_addr) +{ + int i; + struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); + struct resource *res; + char name[128]; + int size; + + res = &dino_dev->hba.lmmio_space; + res->flags = IORESOURCE_MEM; + size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)", + dev_name(bus->bridge)); + res->name = kmalloc(size+1, GFP_KERNEL); + if(res->name) + strcpy((char *)res->name, name); + else + res->name = dino_dev->hba.lmmio_space.name; + + + if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB, + F_EXTEND(0xf0000000UL) | _8MB, + F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) { + struct pci_dev *dev, *tmp; + + printk(KERN_ERR "Dino: cannot attach bus %s\n", + dev_name(bus->bridge)); + /* kill the bus, we can't do anything with it */ + list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) { + list_del(&dev->bus_list); + } + + return; + } + bus->resource[1] = res; + bus->resource[0] = &(dino_dev->hba.io_space); + + /* Now tell dino what range it has */ + for (i = 1; i < 31; i++) { + if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB))) + break; + } + DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n", + i, res->start, base_addr + DINO_IO_ADDR_EN); + __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN); +} + +static void __init +dino_card_fixup(struct pci_dev *dev) +{ + u32 irq_pin; + + /* + ** REVISIT: card-mode PCI-PCI expansion chassis do exist. + ** Not sure they were ever productized. + ** Die here since we'll die later in dino_inb() anyway. + */ + if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { + panic("Card-Mode Dino: PCI-PCI Bridge not supported\n"); + } + + /* + ** Set Latency Timer to 0xff (not a shared bus) + ** Set CACHELINE_SIZE. + */ + dino_cfg_write(dev->bus, dev->devfn, + PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4); + + /* + ** Program INT_LINE for card-mode devices. + ** The cards are hardwired according to this algorithm. + ** And it doesn't matter if PPB's are present or not since + ** the IRQ lines bypass the PPB. + ** + ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range. + ** The additional "-1" adjusts for skewing the IRQ<->slot. + */ + dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin); + dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; + + /* Shouldn't really need to do this but it's in case someone tries + ** to bypass PCI services and look at the card themselves. + */ + dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq); +} + +/* The alignment contraints for PCI bridges under dino */ +#define DINO_BRIDGE_ALIGN 0x100000 + + +static void __init +dino_fixup_bus(struct pci_bus *bus) +{ + struct pci_dev *dev; + struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); + + DBG(KERN_WARNING "%s(0x%px) bus %d platform_data 0x%px\n", + __func__, bus, bus->busn_res.start, + bus->bridge->platform_data); + + /* Firmware doesn't set up card-mode dino, so we have to */ + if (is_card_dino(&dino_dev->hba.dev->id)) { + dino_card_setup(bus, dino_dev->hba.base_addr); + } else if (bus->parent) { + int i; + + pci_read_bridge_bases(bus); + + + for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) { + if((bus->self->resource[i].flags & + (IORESOURCE_IO | IORESOURCE_MEM)) == 0) + continue; + + if(bus->self->resource[i].flags & IORESOURCE_MEM) { + /* There's a quirk to alignment of + * bridge memory resources: the start + * is the alignment and start-end is + * the size. However, firmware will + * have assigned start and end, so we + * need to take this into account */ + bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN; + bus->self->resource[i].start = DINO_BRIDGE_ALIGN; + + } + + DBG("DEBUG %s assigning %d [%pR]\n", + dev_name(&bus->self->dev), i, + &bus->self->resource[i]); + WARN_ON(pci_assign_resource(bus->self, i)); + DBG("DEBUG %s after assign %d [%pR]\n", + dev_name(&bus->self->dev), i, + &bus->self->resource[i]); + } + } + + + list_for_each_entry(dev, &bus->devices, bus_list) { + if (is_card_dino(&dino_dev->hba.dev->id)) + dino_card_fixup(dev); + + /* + ** P2PB's only have 2 BARs, no IRQs. + ** I'd like to just ignore them for now. + */ + if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { + pcibios_init_bridge(dev); + continue; + } + + /* null out the ROM resource if there is one (we don't + * care about an expansion rom on parisc, since it + * usually contains (x86) bios code) */ + dev->resource[PCI_ROM_RESOURCE].flags = 0; + + if(dev->irq == 255) { + +#define DINO_FIX_UNASSIGNED_INTERRUPTS +#ifdef DINO_FIX_UNASSIGNED_INTERRUPTS + + /* This code tries to assign an unassigned + * interrupt. Leave it disabled unless you + * *really* know what you're doing since the + * pin<->interrupt line mapping varies by bus + * and machine */ + + u32 irq_pin; + + dino_cfg_read(dev->bus, dev->devfn, + PCI_INTERRUPT_PIN, 1, &irq_pin); + irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; + printk(KERN_WARNING "Device %s has undefined IRQ, " + "setting to %d\n", pci_name(dev), irq_pin); + dino_cfg_write(dev->bus, dev->devfn, + PCI_INTERRUPT_LINE, 1, irq_pin); + dino_assign_irq(dino_dev, irq_pin, &dev->irq); +#else + dev->irq = 65535; + printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev)); +#endif + } else { + /* Adjust INT_LINE for that busses region */ + dino_assign_irq(dino_dev, dev->irq, &dev->irq); + } + } +} + + +static struct pci_bios_ops dino_bios_ops = { + .init = dino_bios_init, + .fixup_bus = dino_fixup_bus +}; + + +/* + * Initialise a DINO controller chip + */ +static void __init +dino_card_init(struct dino_device *dino_dev) +{ + u32 brdg_feat = 0x00784e05; + unsigned long status; + + status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS); + if (status & 0x0000ff80) { + __raw_writel(0x00000005, + dino_dev->hba.base_addr+DINO_IO_COMMAND); + udelay(1); + } + + __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK); + __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN); + __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR); + +#if 1 +/* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */ + /* + ** PCX-L processors don't support XQL like Dino wants it. + ** PCX-L2 ignore XQL signal and it doesn't matter. + */ + brdg_feat &= ~0x4; /* UXQL */ +#endif + __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT); + + /* + ** Don't enable address decoding until we know which I/O range + ** currently is available from the host. Only affects MMIO + ** and not I/O port space. + */ + __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN); + + __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE); + __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR); + __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR); + + __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM); + __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL); + __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM); + + /* Disable PAMR before writing PAPR */ + __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR); + __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR); + __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR); + + /* + ** Dino ERS encourages enabling FBB (0x6f). + ** We can't until we know *all* devices below us can support it. + ** (Something in device configuration header tells us). + */ + __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD); + + /* Somewhere, the PCI spec says give devices 1 second + ** to recover from the #RESET being de-asserted. + ** Experience shows most devices only need 10ms. + ** This short-cut speeds up booting significantly. + */ + mdelay(pci_post_reset_delay); +} + +static int __init +dino_bridge_init(struct dino_device *dino_dev, const char *name) +{ + unsigned long io_addr; + int result, i, count=0; + struct resource *res, *prevres = NULL; + /* + * Decoding IO_ADDR_EN only works for Built-in Dino + * since PDC has already initialized this. + */ + + io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN); + if (io_addr == 0) { + printk(KERN_WARNING "%s: No PCI devices enabled.\n", name); + return -ENODEV; + } + + res = &dino_dev->hba.lmmio_space; + for (i = 0; i < 32; i++) { + unsigned long start, end; + + if((io_addr & (1 << i)) == 0) + continue; + + start = F_EXTEND(0xf0000000UL) | (i << 23); + end = start + 8 * 1024 * 1024 - 1; + + DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count, + start, end); + + if(prevres && prevres->end + 1 == start) { + prevres->end = end; + } else { + if(count >= DINO_MAX_LMMIO_RESOURCES) { + printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end); + break; + } + prevres = res; + res->start = start; + res->end = end; + res->flags = IORESOURCE_MEM; + res->name = kmalloc(64, GFP_KERNEL); + if(res->name) + snprintf((char *)res->name, 64, "%s LMMIO %d", + name, count); + res++; + count++; + } + } + + res = &dino_dev->hba.lmmio_space; + + for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) { + if(res[i].flags == 0) + break; + + result = ccio_request_resource(dino_dev->hba.dev, &res[i]); + if (result < 0) { + printk(KERN_ERR "%s: failed to claim PCI Bus address " + "space %d (%pR)!\n", name, i, &res[i]); + return result; + } + } + return 0; +} + +static int __init dino_common_init(struct parisc_device *dev, + struct dino_device *dino_dev, const char *name) +{ + int status; + u32 eim; + struct resource *res; + + pcibios_register_hba(&dino_dev->hba); + + pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */ + pci_port = &dino_port_ops; + + /* + ** Note: SMP systems can make use of IRR1/IAR1 registers + ** But it won't buy much performance except in very + ** specific applications/configurations. Note Dino + ** still only has 11 IRQ input lines - just map some of them + ** to a different processor. + */ + dev->irq = gsc_alloc_irq(&dino_dev->gsc_irq); + eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data; + + /* + ** Dino needs a PA "IRQ" to get a processor's attention. + ** arch/parisc/kernel/irq.c returns an EIRR bit. + */ + if (dev->irq < 0) { + printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name); + return 1; + } + + status = request_irq(dev->irq, dino_isr, 0, name, dino_dev); + if (status) { + printk(KERN_WARNING "%s: request_irq() failed with %d\n", + name, status); + return 1; + } + + /* Support the serial port which is sometimes attached on built-in + * Dino / Cujo chips. + */ + + gsc_fixup_irqs(dev, dino_dev, dino_choose_irq); + + /* + ** This enables DINO to generate interrupts when it sees + ** any of its inputs *change*. Just asserting an IRQ + ** before it's enabled (ie unmasked) isn't good enough. + */ + __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); + + /* + ** Some platforms don't clear Dino's IRR0 register at boot time. + ** Reading will clear it now. + */ + __raw_readl(dino_dev->hba.base_addr+DINO_IRR0); + + /* allocate I/O Port resource region */ + res = &dino_dev->hba.io_space; + if (!is_cujo(&dev->id)) { + res->name = "Dino I/O Port"; + } else { + res->name = "Cujo I/O Port"; + } + res->start = HBA_PORT_BASE(dino_dev->hba.hba_num); + res->end = res->start + (HBA_PORT_SPACE_SIZE - 1); + res->flags = IORESOURCE_IO; /* do not mark it busy ! */ + if (request_resource(&ioport_resource, res) < 0) { + printk(KERN_ERR "%s: request I/O Port region failed " + "0x%lx/%lx (hpa 0x%px)\n", + name, (unsigned long)res->start, (unsigned long)res->end, + dino_dev->hba.base_addr); + return 1; + } + + return 0; +} + +#define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL) +#define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL) +#define CUJO_RAVEN_BADPAGE 0x01003000UL +#define CUJO_FIREHAWK_BADPAGE 0x01607000UL + +static const char dino_vers[][4] = { + "2.0", + "2.1", + "3.0", + "3.1" +}; + +static const char cujo_vers[][4] = { + "1.0", + "2.0" +}; + +void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp); + +/* +** Determine if dino should claim this chip (return 0) or not (return 1). +** If so, initialize the chip appropriately (card-mode vs bridge mode). +** Much of the initialization is common though. +*/ +static int __init dino_probe(struct parisc_device *dev) +{ + struct dino_device *dino_dev; // Dino specific control struct + const char *version = "unknown"; + char *name; + int is_cujo = 0; + LIST_HEAD(resources); + struct pci_bus *bus; + unsigned long hpa = dev->hpa.start; + int max; + + name = "Dino"; + if (is_card_dino(&dev->id)) { + version = "3.x (card mode)"; + } else { + if (!is_cujo(&dev->id)) { + if (dev->id.hversion_rev < 4) { + version = dino_vers[dev->id.hversion_rev]; + } + } else { + name = "Cujo"; + is_cujo = 1; + if (dev->id.hversion_rev < 2) { + version = cujo_vers[dev->id.hversion_rev]; + } + } + } + + printk("%s version %s found at 0x%lx\n", name, version, hpa); + + if (!request_mem_region(hpa, PAGE_SIZE, name)) { + printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%lx)!\n", + hpa); + return 1; + } + + /* Check for bugs */ + if (is_cujo && dev->id.hversion_rev == 1) { +#ifdef CONFIG_IOMMU_CCIO + printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n"); + if (hpa == (unsigned long)CUJO_RAVEN_ADDR) { + ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE); + } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) { + ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE); + } else { + printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa); + } +#endif + } else if (!is_cujo && !is_card_dino(&dev->id) && + dev->id.hversion_rev < 3) { + printk(KERN_WARNING +"The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n" +"data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n" +"Systems shipped after Aug 20, 1997 will not exhibit this problem.\n" +"Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n", + dev->id.hversion_rev); +/* REVISIT: why are C200/C240 listed in the README table but not +** "Models affected"? Could be an omission in the original literature. +*/ + } + + dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL); + if (!dino_dev) { + printk("dino_init_chip - couldn't alloc dino_device\n"); + return 1; + } + + dino_dev->hba.dev = dev; + dino_dev->hba.base_addr = ioremap(hpa, 4096); + dino_dev->hba.lmmio_space_offset = PCI_F_EXTEND; + spin_lock_init(&dino_dev->dinosaur_pen); + dino_dev->hba.iommu = ccio_get_iommu(dev); + + if (is_card_dino(&dev->id)) { + dino_card_init(dino_dev); + } else { + dino_bridge_init(dino_dev, name); + } + + if (dino_common_init(dev, dino_dev, name)) + return 1; + + dev->dev.platform_data = dino_dev; + + pci_add_resource_offset(&resources, &dino_dev->hba.io_space, + HBA_PORT_BASE(dino_dev->hba.hba_num)); + if (dino_dev->hba.lmmio_space.flags) + pci_add_resource_offset(&resources, &dino_dev->hba.lmmio_space, + dino_dev->hba.lmmio_space_offset); + if (dino_dev->hba.elmmio_space.flags) + pci_add_resource_offset(&resources, &dino_dev->hba.elmmio_space, + dino_dev->hba.lmmio_space_offset); + if (dino_dev->hba.gmmio_space.flags) + pci_add_resource(&resources, &dino_dev->hba.gmmio_space); + + dino_dev->hba.bus_num.start = dino_current_bus; + dino_dev->hba.bus_num.end = 255; + dino_dev->hba.bus_num.flags = IORESOURCE_BUS; + pci_add_resource(&resources, &dino_dev->hba.bus_num); + /* + ** It's not used to avoid chicken/egg problems + ** with configuration accessor functions. + */ + dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev, + dino_current_bus, &dino_cfg_ops, NULL, &resources); + if (!bus) { + printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n", + dev_name(&dev->dev), dino_current_bus); + pci_free_resource_list(&resources); + /* increment the bus number in case of duplicates */ + dino_current_bus++; + return 0; + } + + max = pci_scan_child_bus(bus); + pci_bus_update_busn_res_end(bus, max); + + /* This code *depends* on scanning being single threaded + * if it isn't, this global bus number count will fail + */ + dino_current_bus = max + 1; + pci_bus_assign_resources(bus); + pci_bus_add_devices(bus); + return 0; +} + +/* + * Normally, we would just test sversion. But the Elroy PCI adapter has + * the same sversion as Dino, so we have to check hversion as well. + * Unfortunately, the J2240 PDC reports the wrong hversion for the first + * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240. + * For card-mode Dino, most machines report an sversion of 9D. But 715 + * and 725 firmware misreport it as 0x08080 for no adequately explained + * reason. + */ +static const struct parisc_device_id dino_tbl[] __initconst = { + { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */ + { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */ + { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */ + { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */ + { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */ + { 0, } +}; + +static struct parisc_driver dino_driver __refdata = { + .name = "dino", + .id_table = dino_tbl, + .probe = dino_probe, +}; + +/* + * One time initialization to let the world know Dino is here. + * This is the only routine which is NOT static. + * Must be called exactly once before pci_init(). + */ +int __init dino_init(void) +{ + register_parisc_driver(&dino_driver); + return 0; +} + |