[POWERPC] celleb: Consolidate io-workarounds code (6ec859e1) · Commits · e / devices / android_kernel_fairphone_FP4

arch/powerpc/platforms/cell/Makefile

+6 −0

Original line number	Diff line number	Diff line
		@@ -27,3 +27,9 @@ obj-$(CONFIG_SPU_BASE) += spu_callbacks.o spu_base.o \
		spufs/

		obj-$(CONFIG_PCI_MSI) += axon_msi.o


		# celleb stuff
		ifeq ($(CONFIG_PPC_CELLEB),y)
		obj-y += io-workarounds.o spider-pci.o
		endif

arch/powerpc/platforms/celleb/Makefile

+1 −2

Original line number	Diff line number	Diff line
		obj-y += interrupt.o iommu.o setup.o \
		htab.o beat.o hvCall.o pci.o \
		scc_epci.o scc_uhc.o \
		io-workarounds.o
		scc_epci.o scc_uhc.o

		obj-$(CONFIG_SMP) += smp.o
		obj-$(CONFIG_PPC_UDBG_BEAT) += udbg_beat.o

arch/powerpc/platforms/celleb/io-workarounds.c

deleted100644 → 0

+0 −280

Original line number	Diff line number	Diff line
		/*
		* Support for Celleb io workarounds
		*
		* (C) Copyright 2006-2007 TOSHIBA CORPORATION
		*
		* This file is based to arch/powerpc/platform/cell/io-workarounds.c
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License along
		* with this program; if not, write to the Free Software Foundation, Inc.,
		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
		*/

		#undef DEBUG

		#include <linux/of.h>
		#include <linux/of_device.h>
		#include <linux/irq.h>

		#include <asm/io.h>
		#include <asm/prom.h>
		#include <asm/machdep.h>
		#include <asm/pci-bridge.h>
		#include <asm/ppc-pci.h>

		#include "pci.h"

		#define MAX_CELLEB_PCI_BUS 4

		void *celleb_dummy_page_va;

		static struct celleb_pci_bus {
		struct pci_controller *phb;
		void (dummy_read)(struct pci_controller );
		} celleb_pci_busses[MAX_CELLEB_PCI_BUS];

		static int celleb_pci_count = 0;

		static struct celleb_pci_bus *celleb_pci_find(unsigned long vaddr,
		unsigned long paddr)
		{
		int i, j;
		struct resource *res;

		for (i = 0; i < celleb_pci_count; i++) {
		struct celleb_pci_bus *bus = &celleb_pci_busses[i];
		struct pci_controller *phb = bus->phb;
		if (paddr)
		for (j = 0; j < 3; j++) {
		res = &phb->mem_resources[j];
		if (paddr >= res->start && paddr <= res->end)
		return bus;
		}
		res = &phb->io_resource;
		if (vaddr && vaddr >= res->start && vaddr <= res->end)
		return bus;
		}
		return NULL;
		}

		static void celleb_io_flush(const PCI_IO_ADDR addr)
		{
		struct celleb_pci_bus *bus;
		int token;

		token = PCI_GET_ADDR_TOKEN(addr);

		if (token && token <= celleb_pci_count)
		bus = &celleb_pci_busses[token - 1];
		else {
		unsigned long vaddr, paddr;
		pte_t *ptep;

		vaddr = (unsigned long)PCI_FIX_ADDR(addr);
		if (vaddr < PHB_IO_BASE \|\| vaddr >= PHB_IO_END)
		return;

		ptep = find_linux_pte(init_mm.pgd, vaddr);
		if (ptep == NULL)
		paddr = 0;
		else
		paddr = pte_pfn(*ptep) << PAGE_SHIFT;
		bus = celleb_pci_find(vaddr, paddr);

		if (bus == NULL)
		return;
		}

		if (bus->dummy_read)
		bus->dummy_read(bus->phb);
		}

		static u8 celleb_readb(const PCI_IO_ADDR addr)
		{
		u8 val;
		val = __do_readb(addr);
		celleb_io_flush(addr);
		return val;
		}

		static u16 celleb_readw(const PCI_IO_ADDR addr)
		{
		u16 val;
		val = __do_readw(addr);
		celleb_io_flush(addr);
		return val;
		}

		static u32 celleb_readl(const PCI_IO_ADDR addr)
		{
		u32 val;
		val = __do_readl(addr);
		celleb_io_flush(addr);
		return val;
		}

		static u64 celleb_readq(const PCI_IO_ADDR addr)
		{
		u64 val;
		val = __do_readq(addr);
		celleb_io_flush(addr);
		return val;
		}

		static u16 celleb_readw_be(const PCI_IO_ADDR addr)
		{
		u16 val;
		val = __do_readw_be(addr);
		celleb_io_flush(addr);
		return val;
		}

		static u32 celleb_readl_be(const PCI_IO_ADDR addr)
		{
		u32 val;
		val = __do_readl_be(addr);
		celleb_io_flush(addr);
		return val;
		}

		static u64 celleb_readq_be(const PCI_IO_ADDR addr)
		{
		u64 val;
		val = __do_readq_be(addr);
		celleb_io_flush(addr);
		return val;
		}

		static void celleb_readsb(const PCI_IO_ADDR addr,
		void *buf, unsigned long count)
		{
		__do_readsb(addr, buf, count);
		celleb_io_flush(addr);
		}

		static void celleb_readsw(const PCI_IO_ADDR addr,
		void *buf, unsigned long count)
		{
		__do_readsw(addr, buf, count);
		celleb_io_flush(addr);
		}

		static void celleb_readsl(const PCI_IO_ADDR addr,
		void *buf, unsigned long count)
		{
		__do_readsl(addr, buf, count);
		celleb_io_flush(addr);
		}

		static void celleb_memcpy_fromio(void *dest,
		const PCI_IO_ADDR src,
		unsigned long n)
		{
		__do_memcpy_fromio(dest, src, n);
		celleb_io_flush(src);
		}

		static void __iomem *celleb_ioremap(unsigned long addr,
		unsigned long size,
		unsigned long flags)
		{
		struct celleb_pci_bus *bus;
		void __iomem *res = __ioremap(addr, size, flags);
		int busno;

		bus = celleb_pci_find(0, addr);
		if (bus != NULL) {
		busno = bus - celleb_pci_busses;
		PCI_SET_ADDR_TOKEN(res, busno + 1);
		}
		return res;
		}

		static void celleb_iounmap(volatile void __iomem *addr)
		{
		return __iounmap(PCI_FIX_ADDR(addr));
		}

		static struct ppc_pci_io celleb_pci_io __initdata = {
		.readb = celleb_readb,
		.readw = celleb_readw,
		.readl = celleb_readl,
		.readq = celleb_readq,
		.readw_be = celleb_readw_be,
		.readl_be = celleb_readl_be,
		.readq_be = celleb_readq_be,
		.readsb = celleb_readsb,
		.readsw = celleb_readsw,
		.readsl = celleb_readsl,
		.memcpy_fromio = celleb_memcpy_fromio,
		};

		void __init celleb_pci_add_one(struct pci_controller *phb,
		void (dummy_read)(struct pci_controller ))
		{
		struct celleb_pci_bus *bus = &celleb_pci_busses[celleb_pci_count];
		struct device_node *np = phb->dn;

		if (celleb_pci_count >= MAX_CELLEB_PCI_BUS) {
		printk(KERN_ERR "Too many pci bridges, workarounds"
		" disabled for %s\n", np->full_name);
		return;
		}

		celleb_pci_count++;

		bus->phb = phb;
		bus->dummy_read = dummy_read;
		}

		static struct of_device_id celleb_pci_workaround_match[] __initdata = {
		{
		.name = "pci-pseudo",
		.data = fake_pci_workaround_init,
		}, {
		.name = "epci",
		.data = epci_workaround_init,
		}, {
		},
		};

		int __init celleb_pci_workaround_init(void)
		{
		struct pci_controller *phb;
		struct device_node *node;
		const struct of_device_id *match;
		void (init_func)(struct pci_controller );

		celleb_dummy_page_va = kmalloc(PAGE_SIZE, GFP_KERNEL);
		if (!celleb_dummy_page_va) {
		printk(KERN_ERR "Celleb: dummy read disabled. "
		"Alloc celleb_dummy_page_va failed\n");
		return 1;
		}

		list_for_each_entry(phb, &hose_list, list_node) {
		node = phb->dn;
		match = of_match_node(celleb_pci_workaround_match, node);

		if (match) {
		init_func = match->data;
		(*init_func)(phb);
		}
		}

		ppc_pci_io = celleb_pci_io;
		ppc_md.ioremap = celleb_ioremap;
		ppc_md.iounmap = celleb_iounmap;

		return 0;
		}

arch/powerpc/platforms/celleb/pci.c

+26 −15

Original line number	Diff line number	Diff line
		@@ -41,6 +41,7 @@
		#include <asm/pci-bridge.h>
		#include <asm/ppc-pci.h>

		#include "../cell/io-workarounds.h"
		#include "pci.h"
		#include "interrupt.h"

		@@ -457,33 +458,39 @@ static int __init celleb_setup_fake_pci(struct device_node *dev,
		return 0;
		}

		void __init fake_pci_workaround_init(struct pci_controller *phb)
		{
		/**
		* We will add fake pci bus to scc_pci_bus for the purpose to improve
		* I/O Macro performance. But device-tree and device drivers
		* are not ready to use address with a token.
		*/

		/* celleb_pci_add_one(phb, NULL); */
		}
		static struct celleb_phb_spec celleb_fake_pci_spec __initdata = {
		.setup = celleb_setup_fake_pci,
		};

		static struct of_device_id celleb_phb_match[] __initdata = {
		{
		.name = "pci-pseudo",
		.data = celleb_setup_fake_pci,
		.data = &celleb_fake_pci_spec,
		}, {
		.name = "epci",
		.data = celleb_setup_epci,
		.data = &celleb_epci_spec,
		}, {
		},
		};

		static int __init celleb_io_workaround_init(struct pci_controller *phb,
		struct celleb_phb_spec *phb_spec)
		{
		if (phb_spec->ops) {
		iowa_register_bus(phb, phb_spec->ops, phb_spec->iowa_init,
		phb_spec->iowa_data);
		io_workaround_init();
		}

		return 0;
		}

		int __init celleb_setup_phb(struct pci_controller *phb)
		{
		struct device_node *dev = phb->dn;
		const struct of_device_id *match;
		int (setup_func)(struct device_node , struct pci_controller *);
		struct celleb_phb_spec *phb_spec;
		int rc;

		match = of_match_node(celleb_phb_match, dev);
		if (!match)
		@@ -492,8 +499,12 @@ int __init celleb_setup_phb(struct pci_controller *phb)
		phb_set_bus_ranges(dev, phb);
		phb->buid = 1;

		setup_func = match->data;
		return (*setup_func)(dev, phb);
		phb_spec = match->data;
		rc = (*phb_spec->setup)(dev, phb);
		if (rc)
		return 1;

		return celleb_io_workaround_init(phb, phb_spec);
		}

		int celleb_pci_probe_mode(struct pci_bus *bus)

arch/powerpc/platforms/celleb/pci.h

+10 −8

Original line number	Diff line number	Diff line
		@@ -27,16 +27,18 @@
		#include <asm/prom.h>
		#include <asm/ppc-pci.h>

		#include "../cell/io-workarounds.h"

		struct celleb_phb_spec {
		int (setup)(struct device_node , struct pci_controller *);
		struct ppc_pci_io *ops;
		int (iowa_init)(struct iowa_bus , void *);
		void *iowa_data;
		};

		extern int celleb_setup_phb(struct pci_controller *);
		extern int celleb_pci_probe_mode(struct pci_bus *);

		extern int celleb_setup_epci(struct device_node , struct pci_controller );

		extern void *celleb_dummy_page_va;
		extern int __init celleb_pci_workaround_init(void);
		extern void __init celleb_pci_add_one(struct pci_controller *,
		void ()(struct pci_controller ));
		extern void fake_pci_workaround_init(struct pci_controller *);
		extern void epci_workaround_init(struct pci_controller *);
		extern struct celleb_phb_spec celleb_epci_spec;

		#endif /* _CELLEB_PCI_H */