[mirror_ubuntu-eoan-kernel.git] / arch / powerpc / platforms / chrp / pci.c

// SPDX-License-Identifier: GPL-2.0
/*
 * CHRP pci routines.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>

#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/hydra.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/sections.h>
#include <asm/pci-bridge.h>
#include <asm/grackle.h>
#include <asm/rtas.h>

#include "chrp.h"
#include "gg2.h"

/* LongTrail */
void __iomem *gg2_pci_config_base;

/*
 * The VLSI Golden Gate II has only 512K of PCI configuration space, so we
 * limit the bus number to 3 bits
 */

int gg2_read_config(struct pci_bus *bus, unsigned int devfn, int off,
			   int len, u32 *val)
{
	volatile void __iomem *cfg_data;
	struct pci_controller *hose = pci_bus_to_host(bus);

	if (bus->number > 7)
		return PCIBIOS_DEVICE_NOT_FOUND;
	/*
	 * Note: the caller has already checked that off is
	 * suitably aligned and that len is 1, 2 or 4.
	 */
	cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
	switch (len) {
	case 1:
		*val =  in_8(cfg_data);
		break;
	case 2:
		*val = in_le16(cfg_data);
		break;
	default:
		*val = in_le32(cfg_data);
		break;
	}
	return PCIBIOS_SUCCESSFUL;
}

int gg2_write_config(struct pci_bus *bus, unsigned int devfn, int off,
			    int len, u32 val)
{
	volatile void __iomem *cfg_data;
	struct pci_controller *hose = pci_bus_to_host(bus);

	if (bus->number > 7)
		return PCIBIOS_DEVICE_NOT_FOUND;
	/*
	 * Note: the caller has already checked that off is
	 * suitably aligned and that len is 1, 2 or 4.
	 */
	cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
	switch (len) {
	case 1:
		out_8(cfg_data, val);
		break;
	case 2:
		out_le16(cfg_data, val);
		break;
	default:
		out_le32(cfg_data, val);
		break;
	}
	return PCIBIOS_SUCCESSFUL;
}

static struct pci_ops gg2_pci_ops =
{
	.read = gg2_read_config,
	.write = gg2_write_config,
};

/*
 * Access functions for PCI config space using RTAS calls.
 */
int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
		     int len, u32 *val)
{
	struct pci_controller *hose = pci_bus_to_host(bus);
	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
		| (((bus->number - hose->first_busno) & 0xff) << 16)
		| (hose->global_number << 24);
        int ret = -1;
	int rval;

	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
	*val = ret;
	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
}

int rtas_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
		      int len, u32 val)
{
	struct pci_controller *hose = pci_bus_to_host(bus);
	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
		| (((bus->number - hose->first_busno) & 0xff) << 16)
		| (hose->global_number << 24);
	int rval;

	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
			 addr, len, val);
	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
}

static struct pci_ops rtas_pci_ops =
{
	.read = rtas_read_config,
	.write = rtas_write_config,
};

volatile struct Hydra __iomem *Hydra = NULL;

int __init
hydra_init(void)
{
	struct device_node *np;
	struct resource r;

	np = of_find_node_by_name(NULL, "mac-io");
	if (np == NULL || of_address_to_resource(np, 0, &r)) {
		of_node_put(np);
		return 0;
	}
	of_node_put(np);
	Hydra = ioremap(r.start, resource_size(&r));
	printk("Hydra Mac I/O at %llx\n", (unsigned long long)r.start);
	printk("Hydra Feature_Control was %x",
	       in_le32(&Hydra->Feature_Control));
	out_le32(&Hydra->Feature_Control, (HYDRA_FC_SCC_CELL_EN |
					   HYDRA_FC_SCSI_CELL_EN |
					   HYDRA_FC_SCCA_ENABLE |
					   HYDRA_FC_SCCB_ENABLE |
					   HYDRA_FC_ARB_BYPASS |
					   HYDRA_FC_MPIC_ENABLE |
					   HYDRA_FC_SLOW_SCC_PCLK |
					   HYDRA_FC_MPIC_IS_MASTER));
	printk(", now %x\n", in_le32(&Hydra->Feature_Control));
	return 1;
}

#define PRG_CL_RESET_VALID 0x00010000

static void __init
setup_python(struct pci_controller *hose, struct device_node *dev)
{
	u32 __iomem *reg;
	u32 val;
	struct resource r;

	if (of_address_to_resource(dev, 0, &r)) {
		printk(KERN_ERR "No address for Python PCI controller\n");
		return;
	}

	/* Clear the magic go-slow bit */
	reg = ioremap(r.start + 0xf6000, 0x40);
	BUG_ON(!reg); 
	val = in_be32(&reg[12]);
	if (val & PRG_CL_RESET_VALID) {
		out_be32(&reg[12], val & ~PRG_CL_RESET_VALID);
		in_be32(&reg[12]);
	}
	iounmap(reg);

	setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010, 0);
}

/* Marvell Discovery II based Pegasos 2 */
static void __init setup_peg2(struct pci_controller *hose, struct device_node *dev)
{
	struct device_node *root = of_find_node_by_path("/");
	struct device_node *rtas;

	rtas = of_find_node_by_name (root, "rtas");
	if (rtas) {
		hose->ops = &rtas_pci_ops;
		of_node_put(rtas);
	} else {
		printk ("RTAS supporting Pegasos OF not found, please upgrade"
			" your firmware\n");
	}
	pci_add_flags(PCI_REASSIGN_ALL_BUS);
	/* keep the reference to the root node */
}

void __init
chrp_find_bridges(void)
{
	struct device_node *dev;
	const int *bus_range;
	int len, index = -1;
	struct pci_controller *hose;
	const unsigned int *dma;
	const char *model, *machine;
	int is_longtrail = 0, is_mot = 0, is_pegasos = 0;
	struct device_node *root = of_find_node_by_path("/");
	struct resource r;
	/*
	 * The PCI host bridge nodes on some machines don't have
	 * properties to adequately identify them, so we have to
	 * look at what sort of machine this is as well.
	 */
	machine = of_get_property(root, "model", NULL);
	if (machine != NULL) {
		is_longtrail = strncmp(machine, "IBM,LongTrail", 13) == 0;
		is_mot = strncmp(machine, "MOT", 3) == 0;
		if (strncmp(machine, "Pegasos2", 8) == 0)
			is_pegasos = 2;
		else if (strncmp(machine, "Pegasos", 7) == 0)
			is_pegasos = 1;
	}
	for (dev = root->child; dev != NULL; dev = dev->sibling) {
		if (dev->type == NULL || strcmp(dev->type, "pci") != 0)
			continue;
		++index;
		/* The GG2 bridge on the LongTrail doesn't have an address */
		if (of_address_to_resource(dev, 0, &r) && !is_longtrail) {
			printk(KERN_WARNING "Can't use %pOF: no address\n",
			       dev);
			continue;
		}
		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 %pOF\n",
				dev);
			continue;
		}
		if (bus_range[1] == bus_range[0])
			printk(KERN_INFO "PCI bus %d", bus_range[0]);
		else
			printk(KERN_INFO "PCI buses %d..%d",
			       bus_range[0], bus_range[1]);
		printk(" controlled by %pOF", dev);
		if (!is_longtrail)
			printk(" at %llx", (unsigned long long)r.start);
		printk("\n");

		hose = pcibios_alloc_controller(dev);
		if (!hose) {
			printk("Can't allocate PCI controller structure for %pOF\n",
				dev);
			continue;
		}
		hose->first_busno = hose->self_busno = bus_range[0];
		hose->last_busno = bus_range[1];

		model = of_get_property(dev, "model", NULL);
		if (model == NULL)
			model = "<none>";
		if (strncmp(model, "IBM, Python", 11) == 0) {
			setup_python(hose, dev);
		} else if (is_mot
			   || strncmp(model, "Motorola, Grackle", 17) == 0) {
			setup_grackle(hose);
		} else if (is_longtrail) {
			void __iomem *p = ioremap(GG2_PCI_CONFIG_BASE, 0x80000);
			hose->ops = &gg2_pci_ops;
			hose->cfg_data = p;
			gg2_pci_config_base = p;
		} else if (is_pegasos == 1) {
			setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc, 0);
		} else if (is_pegasos == 2) {
			setup_peg2(hose, dev);
		} else if (!strncmp(model, "IBM,CPC710", 10)) {
			setup_indirect_pci(hose,
					   r.start + 0x000f8000,
					   r.start + 0x000f8010,
					   0);
			if (index == 0) {
				dma = of_get_property(dev, "system-dma-base",
							&len);
				if (dma && len >= sizeof(*dma)) {
					dma = (unsigned int *)
						(((unsigned long)dma) +
						len - sizeof(*dma));
						pci_dram_offset = *dma;
				}
			}
		} else {
			printk("No methods for %pOF (model %s), using RTAS\n",
			       dev, model);
			hose->ops = &rtas_pci_ops;
		}

		pci_process_bridge_OF_ranges(hose, dev, index == 0);

		/* check the first bridge for a property that we can
		   use to set pci_dram_offset */
		dma = of_get_property(dev, "ibm,dma-ranges", &len);
		if (index == 0 && dma != NULL && len >= 6 * sizeof(*dma)) {
			pci_dram_offset = dma[2] - dma[3];
			printk("pci_dram_offset = %lx\n", pci_dram_offset);
		}
	}
	of_node_put(root);
}

/* SL82C105 IDE Control/Status Register */
#define SL82C105_IDECSR                0x40

/* Fixup for Winbond ATA quirk, required for briq mostly because the
 * 8259 is configured for level sensitive IRQ 14 and so wants the
 * ATA controller to be set to fully native mode or bad things
 * will happen.
 */
static void chrp_pci_fixup_winbond_ata(struct pci_dev *sl82c105)
{
	u8 progif;

	/* If non-briq machines need that fixup too, please speak up */
	if (!machine_is(chrp) || _chrp_type != _CHRP_briq)
		return;

	if ((sl82c105->class & 5) != 5) {
		printk("W83C553: Switching SL82C105 IDE to PCI native mode\n");
		/* Enable SL82C105 PCI native IDE mode */
		pci_read_config_byte(sl82c105, PCI_CLASS_PROG, &progif);
		pci_write_config_byte(sl82c105, PCI_CLASS_PROG, progif | 0x05);
		sl82c105->class |= 0x05;
		/* Disable SL82C105 second port */
		pci_write_config_word(sl82c105, SL82C105_IDECSR, 0x0003);
		/* Clear IO BARs, they will be reassigned */
		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_0, 0);
		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_1, 0);
		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_2, 0);
		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_3, 0);
	}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
			chrp_pci_fixup_winbond_ata);

/* Pegasos2 firmware version 20040810 configures the built-in IDE controller
 * in legacy mode, but sets the PCI registers to PCI native mode.
 * The chip can only operate in legacy mode, so force the PCI class into legacy
 * mode as well. The same fixup must be done to the class-code property in
 * the IDE node /pci@80000000/ide@C,1
 */
static void chrp_pci_fixup_vt8231_ata(struct pci_dev *viaide)
{
	u8 progif;
	struct pci_dev *viaisa;

	if (!machine_is(chrp) || _chrp_type != _CHRP_Pegasos)
		return;
	if (viaide->irq != 14)
		return;

	viaisa = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
	if (!viaisa)
		return;
	dev_info(&viaide->dev, "Fixing VIA IDE, force legacy mode on\n");

	pci_read_config_byte(viaide, PCI_CLASS_PROG, &progif);
	pci_write_config_byte(viaide, PCI_CLASS_PROG, progif & ~0x5);
	viaide->class &= ~0x5;

	pci_dev_put(viaisa);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, chrp_pci_fixup_vt8231_ata);
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
bbd0abda PM	2	/*
	3	* CHRP pci routines.
	4	*/
	5
bbd0abda PM	6	#include <linux/kernel.h>
	7	#include <linux/pci.h>
	8	#include <linux/delay.h>
	9	#include <linux/string.h>
	10	#include <linux/init.h>
bbd0abda PM	11
	12	#include <asm/io.h>
	13	#include <asm/pgtable.h>
	14	#include <asm/irq.h>
	15	#include <asm/hydra.h>
	16	#include <asm/prom.h>
bbd0abda PM	17	#include <asm/machdep.h>
	18	#include <asm/sections.h>
	19	#include <asm/pci-bridge.h>
bbd0abda PM	20	#include <asm/grackle.h>
	21	#include <asm/rtas.h>
	22
b86756ae	23	#include "chrp.h"
33d71d26	24	#include "gg2.h"
b86756ae	25
bbd0abda PM	26	/* LongTrail */
	27	void __iomem *gg2_pci_config_base;
	28
	29	/*
	30	* The VLSI Golden Gate II has only 512K of PCI configuration space, so we
	31	* limit the bus number to 3 bits
	32	*/
	33
	34	int gg2_read_config(struct pci_bus *bus, unsigned int devfn, int off,
	35	int len, u32 *val)
	36	{
	37	volatile void __iomem *cfg_data;
8456993e	38	struct pci_controller *hose = pci_bus_to_host(bus);
bbd0abda PM	39
	40	if (bus->number > 7)
	41	return PCIBIOS_DEVICE_NOT_FOUND;
	42	/*
	43	* Note: the caller has already checked that off is
	44	* suitably aligned and that len is 1, 2 or 4.
	45	*/
	46	cfg_data = hose->cfg_data + ((bus->number<<16) \| (devfn<<8) \| off);
	47	switch (len) {
	48	case 1:
	49	*val = in_8(cfg_data);
	50	break;
	51	case 2:
	52	*val = in_le16(cfg_data);
	53	break;
	54	default:
	55	*val = in_le32(cfg_data);
	56	break;
	57	}
	58	return PCIBIOS_SUCCESSFUL;
	59	}
	60
	61	int gg2_write_config(struct pci_bus *bus, unsigned int devfn, int off,
	62	int len, u32 val)
	63	{
	64	volatile void __iomem *cfg_data;
8456993e	65	struct pci_controller *hose = pci_bus_to_host(bus);
bbd0abda PM	66
	67	if (bus->number > 7)
	68	return PCIBIOS_DEVICE_NOT_FOUND;
	69	/*
	70	* Note: the caller has already checked that off is
	71	* suitably aligned and that len is 1, 2 or 4.
	72	*/
	73	cfg_data = hose->cfg_data + ((bus->number<<16) \| (devfn<<8) \| off);
	74	switch (len) {
	75	case 1:
	76	out_8(cfg_data, val);
	77	break;
	78	case 2:
	79	out_le16(cfg_data, val);
	80	break;
	81	default:
	82	out_le32(cfg_data, val);
	83	break;
	84	}
	85	return PCIBIOS_SUCCESSFUL;
	86	}
	87
	88	static struct pci_ops gg2_pci_ops =
	89	{
f1d645f4 NL	90	.read = gg2_read_config,
f1d645f4 NL	91	.write = gg2_write_config,
bbd0abda PM	92	};
	93
	94	/*
	95	* Access functions for PCI config space using RTAS calls.
	96	*/
	97	int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
	98	int len, u32 *val)
	99	{
8456993e	100	struct pci_controller *hose = pci_bus_to_host(bus);
bbd0abda PM	101	unsigned long addr = (offset & 0xff) \| ((devfn & 0xff) << 8)
bbd0abda PM	102	\| (((bus->number - hose->first_busno) & 0xff) << 16)
5516b540	103	\| (hose->global_number << 24);
bbd0abda PM	104	int ret = -1;
	105	int rval;
	106
	107	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
	108	*val = ret;
	109	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
	110	}
	111
	112	int rtas_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
	113	int len, u32 val)
	114	{
8456993e	115	struct pci_controller *hose = pci_bus_to_host(bus);
bbd0abda PM	116	unsigned long addr = (offset & 0xff) \| ((devfn & 0xff) << 8)
bbd0abda PM	117	\| (((bus->number - hose->first_busno) & 0xff) << 16)
5516b540	118	\| (hose->global_number << 24);
bbd0abda PM	119	int rval;
	120
	121	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
	122	addr, len, val);
	123	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
	124	}
	125
	126	static struct pci_ops rtas_pci_ops =
	127	{
f1d645f4 NL	128	.read = rtas_read_config,
f1d645f4 NL	129	.write = rtas_write_config,
bbd0abda PM	130	};
	131
	132	volatile struct Hydra __iomem *Hydra = NULL;
	133
	134	int __init
	135	hydra_init(void)
	136	{
	137	struct device_node *np;
575e3216	138	struct resource r;
bbd0abda	139
30686ba6 SR	140	np = of_find_node_by_name(NULL, "mac-io");
	141	if (np == NULL \|\| of_address_to_resource(np, 0, &r)) {
	142	of_node_put(np);
bbd0abda	143	return 0;
30686ba6	144	}
29e931c0	145	of_node_put(np);
28f65c11	146	Hydra = ioremap(r.start, resource_size(&r));
685143ac	147	printk("Hydra Mac I/O at %llx\n", (unsigned long long)r.start);
bbd0abda PM	148	printk("Hydra Feature_Control was %x",
	149	in_le32(&Hydra->Feature_Control));
	150	out_le32(&Hydra->Feature_Control, (HYDRA_FC_SCC_CELL_EN \|
	151	HYDRA_FC_SCSI_CELL_EN \|
	152	HYDRA_FC_SCCA_ENABLE \|
	153	HYDRA_FC_SCCB_ENABLE \|
	154	HYDRA_FC_ARB_BYPASS \|
	155	HYDRA_FC_MPIC_ENABLE \|
	156	HYDRA_FC_SLOW_SCC_PCLK \|
	157	HYDRA_FC_MPIC_IS_MASTER));
	158	printk(", now %x\n", in_le32(&Hydra->Feature_Control));
	159	return 1;
	160	}
	161
bbd0abda PM	162	#define PRG_CL_RESET_VALID 0x00010000
	163
	164	static void __init
	165	setup_python(struct pci_controller hose, struct device_node dev)
	166	{
	167	u32 __iomem *reg;
	168	u32 val;
575e3216	169	struct resource r;
bbd0abda	170
575e3216 DW	171	if (of_address_to_resource(dev, 0, &r)) {
	172	printk(KERN_ERR "No address for Python PCI controller\n");
	173	return;
	174	}
bbd0abda PM	175
bbd0abda PM	176	/* Clear the magic go-slow bit */
575e3216 DW	177	reg = ioremap(r.start + 0xf6000, 0x40);
575e3216 DW	178	BUG_ON(!reg);
bbd0abda PM	179	val = in_be32(&reg[12]);
	180	if (val & PRG_CL_RESET_VALID) {
	181	out_be32(&reg[12], val & ~PRG_CL_RESET_VALID);
	182	in_be32(&reg[12]);
	183	}
	184	iounmap(reg);
575e3216	185
2e56ff20	186	setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010, 0);
bbd0abda PM	187	}
	188
	189	/* Marvell Discovery II based Pegasos 2 */
	190	static void __init setup_peg2(struct pci_controller hose, struct device_node dev)
	191	{
8c8dc322	192	struct device_node *root = of_find_node_by_path("/");
bbd0abda PM	193	struct device_node *rtas;
	194
	195	rtas = of_find_node_by_name (root, "rtas");
	196	if (rtas) {
	197	hose->ops = &rtas_pci_ops;
d60dcd94	198	of_node_put(rtas);
bbd0abda PM	199	} else {
	200	printk ("RTAS supporting Pegasos OF not found, please upgrade"
	201	" your firmware\n");
	202	}
0e47ff1c	203	pci_add_flags(PCI_REASSIGN_ALL_BUS);
8c8dc322	204	/* keep the reference to the root node */
bbd0abda PM	205	}
	206
	207	void __init
	208	chrp_find_bridges(void)
	209	{
	210	struct device_node *dev;
ae6b4101	211	const int *bus_range;
bbd0abda PM	212	int len, index = -1;
bbd0abda PM	213	struct pci_controller *hose;
ae6b4101 JK	214	const unsigned int *dma;
ae6b4101 JK	215	const char model, machine;
bbd0abda	216	int is_longtrail = 0, is_mot = 0, is_pegasos = 0;
8c8dc322	217	struct device_node *root = of_find_node_by_path("/");
575e3216	218	struct resource r;
bbd0abda PM	219	/*
	220	* The PCI host bridge nodes on some machines don't have
	221	* properties to adequately identify them, so we have to
	222	* look at what sort of machine this is as well.
	223	*/
e2eb6392	224	machine = of_get_property(root, "model", NULL);
bbd0abda PM	225	if (machine != NULL) {
	226	is_longtrail = strncmp(machine, "IBM,LongTrail", 13) == 0;
	227	is_mot = strncmp(machine, "MOT", 3) == 0;
	228	if (strncmp(machine, "Pegasos2", 8) == 0)
	229	is_pegasos = 2;
	230	else if (strncmp(machine, "Pegasos", 7) == 0)
	231	is_pegasos = 1;
	232	}
	233	for (dev = root->child; dev != NULL; dev = dev->sibling) {
	234	if (dev->type == NULL \|\| strcmp(dev->type, "pci") != 0)
	235	continue;
	236	++index;
	237	/* The GG2 bridge on the LongTrail doesn't have an address */
575e3216	238	if (of_address_to_resource(dev, 0, &r) && !is_longtrail) {
b7c670d6 RH	239	printk(KERN_WARNING "Can't use %pOF: no address\n",
b7c670d6 RH	240	dev);
bbd0abda PM	241	continue;
bbd0abda PM	242	}
e2eb6392	243	bus_range = of_get_property(dev, "bus-range", &len);
bbd0abda	244	if (bus_range == NULL \|\| len < 2 * sizeof(int)) {
b7c670d6 RH	245	printk(KERN_WARNING "Can't get bus-range for %pOF\n",
b7c670d6 RH	246	dev);
bbd0abda PM	247	continue;
	248	}
	249	if (bus_range[1] == bus_range[0])
	250	printk(KERN_INFO "PCI bus %d", bus_range[0]);
	251	else
	252	printk(KERN_INFO "PCI buses %d..%d",
	253	bus_range[0], bus_range[1]);
b7c670d6	254	printk(" controlled by %pOF", dev);
575e3216	255	if (!is_longtrail)
685143ac	256	printk(" at %llx", (unsigned long long)r.start);
bbd0abda PM	257	printk("\n");
bbd0abda PM	258
dbf8471f	259	hose = pcibios_alloc_controller(dev);
bbd0abda	260	if (!hose) {
b7c670d6 RH	261	printk("Can't allocate PCI controller structure for %pOF\n",
b7c670d6 RH	262	dev);
bbd0abda PM	263	continue;
bbd0abda PM	264	}
ee673eaa	265	hose->first_busno = hose->self_busno = bus_range[0];
bbd0abda PM	266	hose->last_busno = bus_range[1];
bbd0abda PM	267
e2eb6392	268	model = of_get_property(dev, "model", NULL);
bbd0abda PM	269	if (model == NULL)
bbd0abda PM	270	model = "<none>";
22007a16	271	if (strncmp(model, "IBM, Python", 11) == 0) {
bbd0abda PM	272	setup_python(hose, dev);
	273	} else if (is_mot
	274	\|\| strncmp(model, "Motorola, Grackle", 17) == 0) {
	275	setup_grackle(hose);
	276	} else if (is_longtrail) {
	277	void __iomem *p = ioremap(GG2_PCI_CONFIG_BASE, 0x80000);
	278	hose->ops = &gg2_pci_ops;
	279	hose->cfg_data = p;
	280	gg2_pci_config_base = p;
	281	} else if (is_pegasos == 1) {
2e56ff20	282	setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc, 0);
bbd0abda PM	283	} else if (is_pegasos == 2) {
bbd0abda PM	284	setup_peg2(hose, dev);
26c5032e BH	285	} else if (!strncmp(model, "IBM,CPC710", 10)) {
	286	setup_indirect_pci(hose,
	287	r.start + 0x000f8000,
2e56ff20 KG	288	r.start + 0x000f8010,
2e56ff20 KG	289	0);
26c5032e	290	if (index == 0) {
e2eb6392 SR	291	dma = of_get_property(dev, "system-dma-base",
e2eb6392 SR	292	&len);
26c5032e BH	293	if (dma && len >= sizeof(*dma)) {
	294	dma = (unsigned int *)
	295	(((unsigned long)dma) +
	296	len - sizeof(*dma));
	297	pci_dram_offset = *dma;
	298	}
	299	}
bbd0abda	300	} else {
b7c670d6 RH	301	printk("No methods for %pOF (model %s), using RTAS\n",
b7c670d6 RH	302	dev, model);
bbd0abda PM	303	hose->ops = &rtas_pci_ops;
	304	}
	305
	306	pci_process_bridge_OF_ranges(hose, dev, index == 0);
	307
	308	/* check the first bridge for a property that we can
	309	use to set pci_dram_offset */
e2eb6392	310	dma = of_get_property(dev, "ibm,dma-ranges", &len);
bbd0abda PM	311	if (index == 0 && dma != NULL && len >= 6 * sizeof(*dma)) {
	312	pci_dram_offset = dma[2] - dma[3];
	313	printk("pci_dram_offset = %lx\n", pci_dram_offset);
	314	}
	315	}
8c8dc322	316	of_node_put(root);
26c5032e BH	317	}
	318
	319	/* SL82C105 IDE Control/Status Register */
	320	#define SL82C105_IDECSR 0x40
	321
6d98bda7 BH	322	/* Fixup for Winbond ATA quirk, required for briq mostly because the
	323	* 8259 is configured for level sensitive IRQ 14 and so wants the
	324	* ATA controller to be set to fully native mode or bad things
	325	* will happen.
	326	*/
cad5cef6	327	static void chrp_pci_fixup_winbond_ata(struct pci_dev *sl82c105)
26c5032e BH	328	{
26c5032e BH	329	u8 progif;
bbd0abda	330
26c5032e BH	331	/* If non-briq machines need that fixup too, please speak up */
	332	if (!machine_is(chrp) \|\| _chrp_type != _CHRP_briq)
	333	return;
	334
	335	if ((sl82c105->class & 5) != 5) {
	336	printk("W83C553: Switching SL82C105 IDE to PCI native mode\n");
	337	/* Enable SL82C105 PCI native IDE mode */
	338	pci_read_config_byte(sl82c105, PCI_CLASS_PROG, &progif);
	339	pci_write_config_byte(sl82c105, PCI_CLASS_PROG, progif \| 0x05);
	340	sl82c105->class \|= 0x05;
	341	/* Disable SL82C105 second port */
	342	pci_write_config_word(sl82c105, SL82C105_IDECSR, 0x0003);
6d98bda7 BH	343	/* Clear IO BARs, they will be reassigned */
	344	pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_0, 0);
	345	pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_1, 0);
	346	pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_2, 0);
	347	pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_3, 0);
26c5032e	348	}
bbd0abda	349	}
6d98bda7 BH	350	DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
6d98bda7 BH	351	chrp_pci_fixup_winbond_ata);
556ecf9b OH	352
	353	/* Pegasos2 firmware version 20040810 configures the built-in IDE controller
	354	* in legacy mode, but sets the PCI registers to PCI native mode.
	355	* The chip can only operate in legacy mode, so force the PCI class into legacy
	356	* mode as well. The same fixup must be done to the class-code property in
	357	* the IDE node /pci@80000000/ide@C,1
	358	*/
092ca5bd	359	static void chrp_pci_fixup_vt8231_ata(struct pci_dev *viaide)
556ecf9b OH	360	{
	361	u8 progif;
	362	struct pci_dev *viaisa;
	363
	364	if (!machine_is(chrp) \|\| _chrp_type != _CHRP_Pegasos)
	365	return;
	366	if (viaide->irq != 14)
	367	return;
	368
	369	viaisa = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
	370	if (!viaisa)
	371	return;
fc3a8828	372	dev_info(&viaide->dev, "Fixing VIA IDE, force legacy mode on\n");
556ecf9b OH	373
	374	pci_read_config_byte(viaide, PCI_CLASS_PROG, &progif);
	375	pci_write_config_byte(viaide, PCI_CLASS_PROG, progif & ~0x5);
	376	viaide->class &= ~0x5;
	377
	378	pci_dev_put(viaisa);
	379	}
092ca5bd	380	DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, chrp_pci_fixup_vt8231_ata);