diff options
Diffstat (limited to 'arch/arm/mach-ks8695/pci.c')
| -rw-r--r-- | arch/arm/mach-ks8695/pci.c | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/arch/arm/mach-ks8695/pci.c b/arch/arm/mach-ks8695/pci.c deleted file mode 100644 index 83f330bf07dd..000000000000 --- a/arch/arm/mach-ks8695/pci.c +++ /dev/null @@ -1,247 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * arch/arm/mach-ks8695/pci.c - * - * Copyright (C) 2003, Micrel Semiconductors - * Copyright (C) 2006, Greg Ungerer <gerg@snapgear.com> - * Copyright (C) 2006, Ben Dooks - * Copyright (C) 2007, Andrew Victor - */ - -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/mm.h> -#include <linux/init.h> -#include <linux/irq.h> -#include <linux/delay.h> -#include <linux/io.h> - -#include <asm/signal.h> -#include <asm/mach/pci.h> -#include <mach/hardware.h> - -#include "devices.h" -#include "regs-pci.h" - - -static int pci_dbg; - -static void ks8695_pci_setupconfig(unsigned int bus_nr, unsigned int devfn, unsigned int where) -{ - unsigned long pbca; - - pbca = PBCA_ENABLE | (where & ~3); - pbca |= PCI_SLOT(devfn) << 11 ; - pbca |= PCI_FUNC(devfn) << 8; - pbca |= bus_nr << 16; - - if (bus_nr == 0) { - /* use Type-0 transaction */ - __raw_writel(pbca, KS8695_PCI_VA + KS8695_PBCA); - } else { - /* use Type-1 transaction */ - __raw_writel(pbca | PBCA_TYPE1, KS8695_PCI_VA + KS8695_PBCA); - } -} - -static void __iomem *ks8695_pci_map_bus(struct pci_bus *bus, unsigned int devfn, - int where) -{ - ks8695_pci_setupconfig(bus->number, devfn, where); - return KS8695_PCI_VA + KS8695_PBCD; -} - -static void ks8695_local_writeconfig(int where, u32 value) -{ - ks8695_pci_setupconfig(0, 0, where); - __raw_writel(value, KS8695_PCI_VA + KS8695_PBCD); -} - -static struct pci_ops ks8695_pci_ops = { - .map_bus = ks8695_pci_map_bus, - .read = pci_generic_config_read32, - .write = pci_generic_config_write32, -}; - -static struct resource pci_mem = { - .name = "PCI Memory space", - .start = KS8695_PCIMEM_PA, - .end = KS8695_PCIMEM_PA + (KS8695_PCIMEM_SIZE - 1), - .flags = IORESOURCE_MEM, -}; - -static struct resource pci_io = { - .name = "PCI IO space", - .start = KS8695_PCIIO_PA, - .end = KS8695_PCIIO_PA + (KS8695_PCIIO_SIZE - 1), - .flags = IORESOURCE_IO, -}; - -static int __init ks8695_pci_setup(int nr, struct pci_sys_data *sys) -{ - if (nr > 0) - return 0; - - request_resource(&iomem_resource, &pci_mem); - request_resource(&ioport_resource, &pci_io); - - pci_add_resource_offset(&sys->resources, &pci_io, sys->io_offset); - pci_add_resource_offset(&sys->resources, &pci_mem, sys->mem_offset); - - /* Assign and enable processor bridge */ - ks8695_local_writeconfig(PCI_BASE_ADDRESS_0, KS8695_PCIMEM_PA); - - /* Enable bus-master & Memory Space access */ - ks8695_local_writeconfig(PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); - - /* Set cache-line size & latency. */ - ks8695_local_writeconfig(PCI_CACHE_LINE_SIZE, (32 << 8) | (L1_CACHE_BYTES / sizeof(u32))); - - /* Reserve PCI memory space for PCI-AHB resources */ - if (!request_mem_region(KS8695_PCIMEM_PA, SZ_64M, "PCI-AHB Bridge")) { - printk(KERN_ERR "Cannot allocate PCI-AHB Bridge memory.\n"); - return -EBUSY; - } - - return 1; -} - -static inline unsigned int size_mask(unsigned long size) -{ - return (~size) + 1; -} - -static int ks8695_pci_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) -{ - unsigned long pc = instruction_pointer(regs); - unsigned long instr = *(unsigned long *)pc; - unsigned long cmdstat; - - cmdstat = __raw_readl(KS8695_PCI_VA + KS8695_CRCFCS); - - printk(KERN_ERR "PCI abort: address = 0x%08lx fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx [%s%s%s%s%s]\n", - addr, fsr, regs->ARM_pc, regs->ARM_lr, - cmdstat & (PCI_STATUS_SIG_TARGET_ABORT << 16) ? "GenTarget" : " ", - cmdstat & (PCI_STATUS_REC_TARGET_ABORT << 16) ? "RecvTarget" : " ", - cmdstat & (PCI_STATUS_REC_MASTER_ABORT << 16) ? "MasterAbort" : " ", - cmdstat & (PCI_STATUS_SIG_SYSTEM_ERROR << 16) ? "SysError" : " ", - cmdstat & (PCI_STATUS_DETECTED_PARITY << 16) ? "Parity" : " " - ); - - __raw_writel(cmdstat, KS8695_PCI_VA + KS8695_CRCFCS); - - /* - * If the instruction being executed was a read, - * make it look like it read all-ones. - */ - if ((instr & 0x0c100000) == 0x04100000) { - int reg = (instr >> 12) & 15; - unsigned long val; - - if (instr & 0x00400000) - val = 255; - else - val = -1; - - regs->uregs[reg] = val; - regs->ARM_pc += 4; - return 0; - } - - if ((instr & 0x0e100090) == 0x00100090) { - int reg = (instr >> 12) & 15; - - regs->uregs[reg] = -1; - regs->ARM_pc += 4; - return 0; - } - - return 1; -} - -static void __init ks8695_pci_preinit(void) -{ - /* make software reset to avoid freeze if PCI bus was messed up */ - __raw_writel(0x80000000, KS8695_PCI_VA + KS8695_PBCS); - - /* stage 1 initialization, subid, subdevice = 0x0001 */ - __raw_writel(0x00010001, KS8695_PCI_VA + KS8695_CRCSID); - - /* stage 2 initialization */ - /* prefetch limits with 16 words, retry enable */ - __raw_writel(0x40000000, KS8695_PCI_VA + KS8695_PBCS); - - /* configure memory mapping */ - __raw_writel(KS8695_PCIMEM_PA, KS8695_PCI_VA + KS8695_PMBA); - __raw_writel(size_mask(KS8695_PCIMEM_SIZE), KS8695_PCI_VA + KS8695_PMBAM); - __raw_writel(KS8695_PCIMEM_PA, KS8695_PCI_VA + KS8695_PMBAT); - __raw_writel(0, KS8695_PCI_VA + KS8695_PMBAC); - - /* configure IO mapping */ - __raw_writel(KS8695_PCIIO_PA, KS8695_PCI_VA + KS8695_PIOBA); - __raw_writel(size_mask(KS8695_PCIIO_SIZE), KS8695_PCI_VA + KS8695_PIOBAM); - __raw_writel(KS8695_PCIIO_PA, KS8695_PCI_VA + KS8695_PIOBAT); - __raw_writel(0, KS8695_PCI_VA + KS8695_PIOBAC); - - /* hook in fault handlers */ - hook_fault_code(8, ks8695_pci_fault, SIGBUS, 0, "external abort on non-linefetch"); - hook_fault_code(10, ks8695_pci_fault, SIGBUS, 0, "external abort on non-linefetch"); -} - -static void ks8695_show_pciregs(void) -{ - if (!pci_dbg) - return; - - printk(KERN_INFO "PCI: CRCFID = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFID)); - printk(KERN_INFO "PCI: CRCFCS = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFCS)); - printk(KERN_INFO "PCI: CRCFRV = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFRV)); - printk(KERN_INFO "PCI: CRCFLT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFLT)); - printk(KERN_INFO "PCI: CRCBMA = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCBMA)); - printk(KERN_INFO "PCI: CRCSID = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCSID)); - printk(KERN_INFO "PCI: CRCFIT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFIT)); - - printk(KERN_INFO "PCI: PBM = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PBM)); - printk(KERN_INFO "PCI: PBCS = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PBCS)); - - printk(KERN_INFO "PCI: PMBA = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBA)); - printk(KERN_INFO "PCI: PMBAC = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBAC)); - printk(KERN_INFO "PCI: PMBAM = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBAM)); - printk(KERN_INFO "PCI: PMBAT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBAT)); - - printk(KERN_INFO "PCI: PIOBA = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBA)); - printk(KERN_INFO "PCI: PIOBAC = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBAC)); - printk(KERN_INFO "PCI: PIOBAM = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBAM)); - printk(KERN_INFO "PCI: PIOBAT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBAT)); -} - - -static struct hw_pci ks8695_pci __initdata = { - .nr_controllers = 1, - .ops = &ks8695_pci_ops, - .preinit = ks8695_pci_preinit, - .setup = ks8695_pci_setup, - .postinit = NULL, - .map_irq = NULL, -}; - -void __init ks8695_init_pci(struct ks8695_pci_cfg *cfg) -{ - if (__raw_readl(KS8695_PCI_VA + KS8695_CRCFRV) & CFRV_GUEST) { - printk("PCI: KS8695 in guest mode, not initialising\n"); - return; - } - - pcibios_min_io = 0; - pcibios_min_mem = 0; - - printk(KERN_INFO "PCI: Initialising\n"); - ks8695_show_pciregs(); - - /* set Mode */ - __raw_writel(cfg->mode << 29, KS8695_PCI_VA + KS8695_PBM); - - ks8695_pci.map_irq = cfg->map_irq; /* board-specific map_irq method */ - - pci_common_init(&ks8695_pci); -} |