[deliverable/linux.git] / arch / powerpc / platforms / chrp / pci.c

/*
 * 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/gg2.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"

/* 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 = bus->sysdata;

	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 = bus->sysdata;

	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 =
{
	gg2_read_config,
	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 = bus->sysdata;
	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 = bus->sysdata;
	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 =
{
	rtas_read_config,
	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;
	}
	Hydra = ioremap(r.start, r.end-r.start);
	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_assign_all_buses = 1;
	/* 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 %s: no address\n",
			       dev->full_name);
			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 %s\n",
				dev->full_name);
			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 %s", dev->full_name);
		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 %s\n",
				dev->full_name);
			continue;
		}
		hose->first_busno = bus_range[0];
		hose->last_busno = bus_range[1];

		model = of_get_property(dev, "model", NULL);
		if (model == NULL)
			model = "<none>";
		if (of_device_is_compatible(dev, "IBM,python")) {
			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 %s (model %s), using RTAS\n",
			       dev->full_name, 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 */
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);
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
		chrp_pci_fixup_winbond_ata);
Commit	Line	Data
bbd0abda PM	1	/*
	2	* CHRP pci routines.
	3	*/
	4
bbd0abda PM	5	#include <linux/kernel.h>
	6	#include <linux/pci.h>
	7	#include <linux/delay.h>
	8	#include <linux/string.h>
	9	#include <linux/init.h>
bbd0abda PM	10
	11	#include <asm/io.h>
	12	#include <asm/pgtable.h>
	13	#include <asm/irq.h>
	14	#include <asm/hydra.h>
	15	#include <asm/prom.h>
	16	#include <asm/gg2.h>
	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 PM	23	#include "chrp.h"
b86756ae PM	24
bbd0abda PM	25	/* LongTrail */
	26	void __iomem *gg2_pci_config_base;
	27
	28	/*
	29	* The VLSI Golden Gate II has only 512K of PCI configuration space, so we
	30	* limit the bus number to 3 bits
	31	*/
	32
	33	int gg2_read_config(struct pci_bus *bus, unsigned int devfn, int off,
	34	int len, u32 *val)
	35	{
	36	volatile void __iomem *cfg_data;
	37	struct pci_controller *hose = bus->sysdata;
	38
	39	if (bus->number > 7)
	40	return PCIBIOS_DEVICE_NOT_FOUND;
	41	/*
	42	* Note: the caller has already checked that off is
	43	* suitably aligned and that len is 1, 2 or 4.
	44	*/
	45	cfg_data = hose->cfg_data + ((bus->number<<16) \| (devfn<<8) \| off);
	46	switch (len) {
	47	case 1:
	48	*val = in_8(cfg_data);
	49	break;
	50	case 2:
	51	*val = in_le16(cfg_data);
	52	break;
	53	default:
	54	*val = in_le32(cfg_data);
	55	break;
	56	}
	57	return PCIBIOS_SUCCESSFUL;
	58	}
	59
	60	int gg2_write_config(struct pci_bus *bus, unsigned int devfn, int off,
	61	int len, u32 val)
	62	{
	63	volatile void __iomem *cfg_data;
	64	struct pci_controller *hose = bus->sysdata;
	65
	66	if (bus->number > 7)
	67	return PCIBIOS_DEVICE_NOT_FOUND;
	68	/*
	69	* Note: the caller has already checked that off is
	70	* suitably aligned and that len is 1, 2 or 4.
	71	*/
	72	cfg_data = hose->cfg_data + ((bus->number<<16) \| (devfn<<8) \| off);
	73	switch (len) {
	74	case 1:
	75	out_8(cfg_data, val);
	76	break;
	77	case 2:
	78	out_le16(cfg_data, val);
	79	break;
	80	default:
	81	out_le32(cfg_data, val);
	82	break;
	83	}
	84	return PCIBIOS_SUCCESSFUL;
	85	}
	86
	87	static struct pci_ops gg2_pci_ops =
	88	{
89	gg2_read_config,
90	gg2_write_config
91	};
92
93	/*
94	* Access functions for PCI config space using RTAS calls.
95	*/
96	int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
97	int len, u32 *val)
98	{
99	struct pci_controller *hose = bus->sysdata;
100	unsigned long addr = (offset & 0xff) \| ((devfn & 0xff) << 8)
101	\| (((bus->number - hose->first_busno) & 0xff) << 16)
5516b540	102	\| (hose->global_number << 24);
bbd0abda PM	103	int ret = -1;
	104	int rval;
	105
	106	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
	107	*val = ret;
	108	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
	109	}
	110
	111	int rtas_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
	112	int len, u32 val)
	113	{
	114	struct pci_controller *hose = bus->sysdata;
	115	unsigned long addr = (offset & 0xff) \| ((devfn & 0xff) << 8)
	116	\| (((bus->number - hose->first_busno) & 0xff) << 16)
5516b540	117	\| (hose->global_number << 24);
bbd0abda PM	118	int rval;
	119
	120	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
	121	addr, len, val);
	122	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
	123	}
	124
	125	static struct pci_ops rtas_pci_ops =
	126	{
	127	rtas_read_config,
	128	rtas_write_config
	129	};
	130
	131	volatile struct Hydra __iomem *Hydra = NULL;
	132
	133	int __init
	134	hydra_init(void)
	135	{
	136	struct device_node *np;
575e3216	137	struct resource r;
bbd0abda	138
30686ba6 SR	139	np = of_find_node_by_name(NULL, "mac-io");
	140	if (np == NULL \|\| of_address_to_resource(np, 0, &r)) {
	141	of_node_put(np);
bbd0abda	142	return 0;
30686ba6	143	}
575e3216	144	Hydra = ioremap(r.start, r.end-r.start);
685143ac	145	printk("Hydra Mac I/O at %llx\n", (unsigned long long)r.start);
bbd0abda PM	146	printk("Hydra Feature_Control was %x",
	147	in_le32(&Hydra->Feature_Control));
	148	out_le32(&Hydra->Feature_Control, (HYDRA_FC_SCC_CELL_EN \|
	149	HYDRA_FC_SCSI_CELL_EN \|
	150	HYDRA_FC_SCCA_ENABLE \|
	151	HYDRA_FC_SCCB_ENABLE \|
	152	HYDRA_FC_ARB_BYPASS \|
	153	HYDRA_FC_MPIC_ENABLE \|
	154	HYDRA_FC_SLOW_SCC_PCLK \|
	155	HYDRA_FC_MPIC_IS_MASTER));
	156	printk(", now %x\n", in_le32(&Hydra->Feature_Control));
	157	return 1;
	158	}
	159
bbd0abda PM	160	#define PRG_CL_RESET_VALID 0x00010000
	161
	162	static void __init
	163	setup_python(struct pci_controller hose, struct device_node dev)
	164	{
	165	u32 __iomem *reg;
	166	u32 val;
575e3216	167	struct resource r;
bbd0abda	168
575e3216 DW	169	if (of_address_to_resource(dev, 0, &r)) {
	170	printk(KERN_ERR "No address for Python PCI controller\n");
	171	return;
	172	}
bbd0abda PM	173
bbd0abda PM	174	/* Clear the magic go-slow bit */
575e3216 DW	175	reg = ioremap(r.start + 0xf6000, 0x40);
575e3216 DW	176	BUG_ON(!reg);
bbd0abda PM	177	val = in_be32(&reg[12]);
	178	if (val & PRG_CL_RESET_VALID) {
	179	out_be32(&reg[12], val & ~PRG_CL_RESET_VALID);
	180	in_be32(&reg[12]);
	181	}
	182	iounmap(reg);
575e3216	183
2e56ff20	184	setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010, 0);
bbd0abda PM	185	}
	186
	187	/* Marvell Discovery II based Pegasos 2 */
	188	static void __init setup_peg2(struct pci_controller hose, struct device_node dev)
	189	{
8c8dc322	190	struct device_node *root = of_find_node_by_path("/");
bbd0abda PM	191	struct device_node *rtas;
	192
	193	rtas = of_find_node_by_name (root, "rtas");
	194	if (rtas) {
	195	hose->ops = &rtas_pci_ops;
d60dcd94	196	of_node_put(rtas);
bbd0abda PM	197	} else {
	198	printk ("RTAS supporting Pegasos OF not found, please upgrade"
	199	" your firmware\n");
	200	}
	201	pci_assign_all_buses = 1;
8c8dc322	202	/* keep the reference to the root node */
bbd0abda PM	203	}
	204
	205	void __init
	206	chrp_find_bridges(void)
	207	{
	208	struct device_node *dev;
ae6b4101	209	const int *bus_range;
bbd0abda PM	210	int len, index = -1;
bbd0abda PM	211	struct pci_controller *hose;
ae6b4101 JK	212	const unsigned int *dma;
ae6b4101 JK	213	const char model, machine;
bbd0abda	214	int is_longtrail = 0, is_mot = 0, is_pegasos = 0;
8c8dc322	215	struct device_node *root = of_find_node_by_path("/");
575e3216	216	struct resource r;
bbd0abda PM	217	/*
	218	* The PCI host bridge nodes on some machines don't have
	219	* properties to adequately identify them, so we have to
	220	* look at what sort of machine this is as well.
	221	*/
e2eb6392	222	machine = of_get_property(root, "model", NULL);
bbd0abda PM	223	if (machine != NULL) {
	224	is_longtrail = strncmp(machine, "IBM,LongTrail", 13) == 0;
	225	is_mot = strncmp(machine, "MOT", 3) == 0;
	226	if (strncmp(machine, "Pegasos2", 8) == 0)
	227	is_pegasos = 2;
	228	else if (strncmp(machine, "Pegasos", 7) == 0)
	229	is_pegasos = 1;
	230	}
	231	for (dev = root->child; dev != NULL; dev = dev->sibling) {
	232	if (dev->type == NULL \|\| strcmp(dev->type, "pci") != 0)
	233	continue;
	234	++index;
	235	/* The GG2 bridge on the LongTrail doesn't have an address */
575e3216	236	if (of_address_to_resource(dev, 0, &r) && !is_longtrail) {
bbd0abda PM	237	printk(KERN_WARNING "Can't use %s: no address\n",
	238	dev->full_name);
	239	continue;
	240	}
e2eb6392	241	bus_range = of_get_property(dev, "bus-range", &len);
bbd0abda PM	242	if (bus_range == NULL \|\| len < 2 * sizeof(int)) {
	243	printk(KERN_WARNING "Can't get bus-range for %s\n",
	244	dev->full_name);
	245	continue;
	246	}
	247	if (bus_range[1] == bus_range[0])
	248	printk(KERN_INFO "PCI bus %d", bus_range[0]);
	249	else
	250	printk(KERN_INFO "PCI buses %d..%d",
	251	bus_range[0], bus_range[1]);
26c5032e	252	printk(" controlled by %s", dev->full_name);
575e3216	253	if (!is_longtrail)
685143ac	254	printk(" at %llx", (unsigned long long)r.start);
bbd0abda PM	255	printk("\n");
bbd0abda PM	256
dbf8471f	257	hose = pcibios_alloc_controller(dev);
bbd0abda PM	258	if (!hose) {
	259	printk("Can't allocate PCI controller structure for %s\n",
	260	dev->full_name);
	261	continue;
	262	}
bbd0abda PM	263	hose->first_busno = bus_range[0];
	264	hose->last_busno = bus_range[1];
	265
e2eb6392	266	model = of_get_property(dev, "model", NULL);
bbd0abda PM	267	if (model == NULL)
bbd0abda PM	268	model = "<none>";
55b61fec	269	if (of_device_is_compatible(dev, "IBM,python")) {
bbd0abda PM	270	setup_python(hose, dev);
	271	} else if (is_mot
	272	\|\| strncmp(model, "Motorola, Grackle", 17) == 0) {
	273	setup_grackle(hose);
	274	} else if (is_longtrail) {
	275	void __iomem *p = ioremap(GG2_PCI_CONFIG_BASE, 0x80000);
	276	hose->ops = &gg2_pci_ops;
	277	hose->cfg_data = p;
	278	gg2_pci_config_base = p;
	279	} else if (is_pegasos == 1) {
2e56ff20	280	setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc, 0);
bbd0abda PM	281	} else if (is_pegasos == 2) {
bbd0abda PM	282	setup_peg2(hose, dev);
26c5032e BH	283	} else if (!strncmp(model, "IBM,CPC710", 10)) {
	284	setup_indirect_pci(hose,
	285	r.start + 0x000f8000,
2e56ff20 KG	286	r.start + 0x000f8010,
2e56ff20 KG	287	0);
26c5032e	288	if (index == 0) {
e2eb6392 SR	289	dma = of_get_property(dev, "system-dma-base",
e2eb6392 SR	290	&len);
26c5032e BH	291	if (dma && len >= sizeof(*dma)) {
	292	dma = (unsigned int *)
	293	(((unsigned long)dma) +
	294	len - sizeof(*dma));
	295	pci_dram_offset = *dma;
	296	}
	297	}
bbd0abda PM	298	} else {
	299	printk("No methods for %s (model %s), using RTAS\n",
	300	dev->full_name, model);
	301	hose->ops = &rtas_pci_ops;
	302	}
	303
	304	pci_process_bridge_OF_ranges(hose, dev, index == 0);
	305
	306	/* check the first bridge for a property that we can
	307	use to set pci_dram_offset */
e2eb6392	308	dma = of_get_property(dev, "ibm,dma-ranges", &len);
bbd0abda PM	309	if (index == 0 && dma != NULL && len >= 6 * sizeof(*dma)) {
	310	pci_dram_offset = dma[2] - dma[3];
	311	printk("pci_dram_offset = %lx\n", pci_dram_offset);
	312	}
	313	}
8c8dc322	314	of_node_put(root);
26c5032e BH	315	}
	316
	317	/* SL82C105 IDE Control/Status Register */
	318	#define SL82C105_IDECSR 0x40
	319
	320	/* Fixup for Winbond ATA quirk, required for briq */
	321	void chrp_pci_fixup_winbond_ata(struct pci_dev *sl82c105)
	322	{
	323	u8 progif;
bbd0abda	324
26c5032e BH	325	/* If non-briq machines need that fixup too, please speak up */
	326	if (!machine_is(chrp) \|\| _chrp_type != _CHRP_briq)
	327	return;
	328
	329	if ((sl82c105->class & 5) != 5) {
	330	printk("W83C553: Switching SL82C105 IDE to PCI native mode\n");
	331	/* Enable SL82C105 PCI native IDE mode */
	332	pci_read_config_byte(sl82c105, PCI_CLASS_PROG, &progif);
	333	pci_write_config_byte(sl82c105, PCI_CLASS_PROG, progif \| 0x05);
	334	sl82c105->class \|= 0x05;
	335	/* Disable SL82C105 second port */
	336	pci_write_config_word(sl82c105, SL82C105_IDECSR, 0x0003);
	337	}
bbd0abda	338	}
26c5032e BH	339	DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
26c5032e BH	340	chrp_pci_fixup_winbond_ata);