| /* | 
 |  * MPC85xx/86xx PCI/PCIE support routing. | 
 |  * | 
 |  * Copyright 2007 Freescale Semiconductor, Inc | 
 |  * | 
 |  * Initial author: Xianghua Xiao <x.xiao@freescale.com> | 
 |  * Recode: ZHANG WEI <wei.zhang@freescale.com> | 
 |  * Rewrite the routing for Frescale PCI and PCI Express | 
 |  * 	Roy Zang <tie-fei.zang@freescale.com> | 
 |  * | 
 |  * 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. | 
 |  */ | 
 | #include <linux/kernel.h> | 
 | #include <linux/pci.h> | 
 | #include <linux/delay.h> | 
 | #include <linux/string.h> | 
 | #include <linux/init.h> | 
 | #include <linux/bootmem.h> | 
 |  | 
 | #include <asm/io.h> | 
 | #include <asm/prom.h> | 
 | #include <asm/pci-bridge.h> | 
 | #include <asm/machdep.h> | 
 | #include <sysdev/fsl_soc.h> | 
 | #include <sysdev/fsl_pci.h> | 
 |  | 
 | #if defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_86xx) | 
 | /* atmu setup for fsl pci/pcie controller */ | 
 | void __init setup_pci_atmu(struct pci_controller *hose, struct resource *rsrc) | 
 | { | 
 | 	struct ccsr_pci __iomem *pci; | 
 | 	int i; | 
 |  | 
 | 	pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n", | 
 | 		    (u64)rsrc->start, (u64)rsrc->end - (u64)rsrc->start + 1); | 
 | 	pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1); | 
 |  | 
 | 	/* Disable all windows (except powar0 since its ignored) */ | 
 | 	for(i = 1; i < 5; i++) | 
 | 		out_be32(&pci->pow[i].powar, 0); | 
 | 	for(i = 0; i < 3; i++) | 
 | 		out_be32(&pci->piw[i].piwar, 0); | 
 |  | 
 | 	/* Setup outbound MEM window */ | 
 | 	for(i = 0; i < 3; i++) | 
 | 		if (hose->mem_resources[i].flags & IORESOURCE_MEM){ | 
 | 			resource_size_t pci_addr_start = | 
 | 				 hose->mem_resources[i].start - | 
 | 				 hose->pci_mem_offset; | 
 | 			pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n", | 
 | 				(u64)hose->mem_resources[i].start, | 
 | 				(u64)hose->mem_resources[i].end | 
 | 				  - (u64)hose->mem_resources[i].start + 1); | 
 | 			out_be32(&pci->pow[i+1].potar, (pci_addr_start >> 12)); | 
 | 			out_be32(&pci->pow[i+1].potear, 0); | 
 | 			out_be32(&pci->pow[i+1].powbar, | 
 | 				(hose->mem_resources[i].start >> 12)); | 
 | 			/* Enable, Mem R/W */ | 
 | 			out_be32(&pci->pow[i+1].powar, 0x80044000 | 
 | 				| (__ilog2(hose->mem_resources[i].end | 
 | 				- hose->mem_resources[i].start + 1) - 1)); | 
 | 		} | 
 |  | 
 | 	/* Setup outbound IO window */ | 
 | 	if (hose->io_resource.flags & IORESOURCE_IO){ | 
 | 		pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, " | 
 | 			 "phy base 0x%016llx.\n", | 
 | 			(u64)hose->io_resource.start, | 
 | 			(u64)hose->io_resource.end - (u64)hose->io_resource.start + 1, | 
 | 			(u64)hose->io_base_phys); | 
 | 		out_be32(&pci->pow[i+1].potar, (hose->io_resource.start >> 12)); | 
 | 		out_be32(&pci->pow[i+1].potear, 0); | 
 | 		out_be32(&pci->pow[i+1].powbar, (hose->io_base_phys >> 12)); | 
 | 		/* Enable, IO R/W */ | 
 | 		out_be32(&pci->pow[i+1].powar, 0x80088000 | 
 | 			| (__ilog2(hose->io_resource.end | 
 | 			- hose->io_resource.start + 1) - 1)); | 
 | 	} | 
 |  | 
 | 	/* Setup 2G inbound Memory Window @ 1 */ | 
 | 	out_be32(&pci->piw[2].pitar, 0x00000000); | 
 | 	out_be32(&pci->piw[2].piwbar,0x00000000); | 
 | 	out_be32(&pci->piw[2].piwar, PIWAR_2G); | 
 | } | 
 |  | 
 | void __init setup_pci_cmd(struct pci_controller *hose) | 
 | { | 
 | 	u16 cmd; | 
 | 	int cap_x; | 
 |  | 
 | 	early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd); | 
 | 	cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | 
 | 		| PCI_COMMAND_IO; | 
 | 	early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd); | 
 |  | 
 | 	cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX); | 
 | 	if (cap_x) { | 
 | 		int pci_x_cmd = cap_x + PCI_X_CMD; | 
 | 		cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ | 
 | 			| PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E; | 
 | 		early_write_config_word(hose, 0, 0, pci_x_cmd, cmd); | 
 | 	} else { | 
 | 		early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80); | 
 | 	} | 
 | } | 
 |  | 
 | static void __init setup_pci_pcsrbar(struct pci_controller *hose) | 
 | { | 
 | #ifdef CONFIG_PCI_MSI | 
 | 	phys_addr_t immr_base; | 
 |  | 
 | 	immr_base = get_immrbase(); | 
 | 	early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, immr_base); | 
 | #endif | 
 | } | 
 |  | 
 | static int fsl_pcie_bus_fixup; | 
 |  | 
 | static void __init quirk_fsl_pcie_header(struct pci_dev *dev) | 
 | { | 
 | 	/* if we aren't a PCIe don't bother */ | 
 | 	if (!pci_find_capability(dev, PCI_CAP_ID_EXP)) | 
 | 		return ; | 
 |  | 
 | 	dev->class = PCI_CLASS_BRIDGE_PCI << 8; | 
 | 	fsl_pcie_bus_fixup = 1; | 
 | 	return ; | 
 | } | 
 |  | 
 | int __init fsl_pcie_check_link(struct pci_controller *hose) | 
 | { | 
 | 	u32 val; | 
 | 	early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val); | 
 | 	if (val < PCIE_LTSSM_L0) | 
 | 		return 1; | 
 | 	return 0; | 
 | } | 
 |  | 
 | void fsl_pcibios_fixup_bus(struct pci_bus *bus) | 
 | { | 
 | 	struct pci_controller *hose = (struct pci_controller *) bus->sysdata; | 
 | 	int i; | 
 |  | 
 | 	if ((bus->parent == hose->bus) && | 
 | 	    ((fsl_pcie_bus_fixup && | 
 | 	      early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) || | 
 | 	     (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK))) | 
 | 	{ | 
 | 		for (i = 0; i < 4; ++i) { | 
 | 			struct resource *res = bus->resource[i]; | 
 | 			struct resource *par = bus->parent->resource[i]; | 
 | 			if (res) { | 
 | 				res->start = 0; | 
 | 				res->end   = 0; | 
 | 				res->flags = 0; | 
 | 			} | 
 | 			if (res && par) { | 
 | 				res->start = par->start; | 
 | 				res->end   = par->end; | 
 | 				res->flags = par->flags; | 
 | 			} | 
 | 		} | 
 | 	} | 
 | } | 
 |  | 
 | int __init fsl_add_bridge(struct device_node *dev, int is_primary) | 
 | { | 
 | 	int len; | 
 | 	struct pci_controller *hose; | 
 | 	struct resource rsrc; | 
 | 	const int *bus_range; | 
 |  | 
 | 	pr_debug("Adding PCI host bridge %s\n", dev->full_name); | 
 |  | 
 | 	/* Fetch host bridge registers address */ | 
 | 	if (of_address_to_resource(dev, 0, &rsrc)) { | 
 | 		printk(KERN_WARNING "Can't get pci register base!"); | 
 | 		return -ENOMEM; | 
 | 	} | 
 |  | 
 | 	/* Get bus range if any */ | 
 | 	bus_range = of_get_property(dev, "bus-range", &len); | 
 | 	if (bus_range == NULL || len < 2 * sizeof(int)) | 
 | 		printk(KERN_WARNING "Can't get bus-range for %s, assume" | 
 | 			" bus 0\n", dev->full_name); | 
 |  | 
 | 	ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS; | 
 | 	hose = pcibios_alloc_controller(dev); | 
 | 	if (!hose) | 
 | 		return -ENOMEM; | 
 |  | 
 | 	hose->first_busno = bus_range ? bus_range[0] : 0x0; | 
 | 	hose->last_busno = bus_range ? bus_range[1] : 0xff; | 
 |  | 
 | 	setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4, | 
 | 		PPC_INDIRECT_TYPE_BIG_ENDIAN); | 
 | 	setup_pci_cmd(hose); | 
 |  | 
 | 	/* check PCI express link status */ | 
 | 	if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { | 
 | 		hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG | | 
 | 			PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS; | 
 | 		if (fsl_pcie_check_link(hose)) | 
 | 			hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK; | 
 | 	} | 
 |  | 
 | 	printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. " | 
 | 		"Firmware bus number: %d->%d\n", | 
 | 		(unsigned long long)rsrc.start, hose->first_busno, | 
 | 		hose->last_busno); | 
 |  | 
 | 	pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n", | 
 | 		hose, hose->cfg_addr, hose->cfg_data); | 
 |  | 
 | 	/* Interpret the "ranges" property */ | 
 | 	/* This also maps the I/O region and sets isa_io/mem_base */ | 
 | 	pci_process_bridge_OF_ranges(hose, dev, is_primary); | 
 |  | 
 | 	/* Setup PEX window registers */ | 
 | 	setup_pci_atmu(hose, &rsrc); | 
 |  | 
 | 	/* Setup PEXCSRBAR */ | 
 | 	setup_pci_pcsrbar(hose); | 
 | 	return 0; | 
 | } | 
 |  | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536E, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_header); | 
 | DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8610, quirk_fsl_pcie_header); | 
 | #endif /* CONFIG_PPC_85xx || CONFIG_PPC_86xx */ | 
 |  | 
 | #if defined(CONFIG_PPC_83xx) | 
 | int __init mpc83xx_add_bridge(struct device_node *dev) | 
 | { | 
 | 	int len; | 
 | 	struct pci_controller *hose; | 
 | 	struct resource rsrc; | 
 | 	const int *bus_range; | 
 | 	int primary = 1, has_address = 0; | 
 | 	phys_addr_t immr = get_immrbase(); | 
 |  | 
 | 	pr_debug("Adding PCI host bridge %s\n", dev->full_name); | 
 |  | 
 | 	/* Fetch host bridge registers address */ | 
 | 	has_address = (of_address_to_resource(dev, 0, &rsrc) == 0); | 
 |  | 
 | 	/* Get bus range if any */ | 
 | 	bus_range = of_get_property(dev, "bus-range", &len); | 
 | 	if (bus_range == NULL || len < 2 * sizeof(int)) { | 
 | 		printk(KERN_WARNING "Can't get bus-range for %s, assume" | 
 | 		       " bus 0\n", dev->full_name); | 
 | 	} | 
 |  | 
 | 	ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS; | 
 | 	hose = pcibios_alloc_controller(dev); | 
 | 	if (!hose) | 
 | 		return -ENOMEM; | 
 |  | 
 | 	hose->first_busno = bus_range ? bus_range[0] : 0; | 
 | 	hose->last_busno = bus_range ? bus_range[1] : 0xff; | 
 |  | 
 | 	/* MPC83xx supports up to two host controllers one at 0x8500 from immrbar | 
 | 	 * the other at 0x8600, we consider the 0x8500 the primary controller | 
 | 	 */ | 
 | 	/* PCI 1 */ | 
 | 	if ((rsrc.start & 0xfffff) == 0x8500) { | 
 | 		setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304, 0); | 
 | 	} | 
 | 	/* PCI 2 */ | 
 | 	if ((rsrc.start & 0xfffff) == 0x8600) { | 
 | 		setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384, 0); | 
 | 		primary = 0; | 
 | 	} | 
 |  | 
 | 	printk(KERN_INFO "Found MPC83xx PCI host bridge at 0x%016llx. " | 
 | 	       "Firmware bus number: %d->%d\n", | 
 | 	       (unsigned long long)rsrc.start, hose->first_busno, | 
 | 	       hose->last_busno); | 
 |  | 
 | 	pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n", | 
 | 	    hose, hose->cfg_addr, hose->cfg_data); | 
 |  | 
 | 	/* Interpret the "ranges" property */ | 
 | 	/* This also maps the I/O region and sets isa_io/mem_base */ | 
 | 	pci_process_bridge_OF_ranges(hose, dev, primary); | 
 |  | 
 | 	return 0; | 
 | } | 
 | #endif /* CONFIG_PPC_83xx */ |