[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / aic7xxx / aic79xx_osm_pci.c

/*
 * Linux driver attachment glue for PCI based U320 controllers.
 *
 * Copyright (c) 2000-2001 Adaptec Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm_pci.c#25 $
 */

#include "aic79xx_osm.h"
#include "aic79xx_inline.h"
#include "aic79xx_pci.h"

static int	ahd_linux_pci_dev_probe(struct pci_dev *pdev,
					const struct pci_device_id *ent);
static int	ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
						 u_long *base, u_long *base2);
static int	ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
						 u_long *bus_addr,
						 uint8_t __iomem **maddr);
static void	ahd_linux_pci_dev_remove(struct pci_dev *pdev);

/* Define the macro locally since it's different for different class of chips.
 */
#define ID(x)            \
	ID2C(x),         \
	ID2C(IDIROC(x))

static struct pci_device_id ahd_linux_pci_id_table[] = {
	/* aic7901 based controllers */
	ID(ID_AHA_29320A),
	ID(ID_AHA_29320ALP),
	ID(ID_AHA_29320LPE),
	/* aic7902 based controllers */
	ID(ID_AHA_29320),
	ID(ID_AHA_29320B),
	ID(ID_AHA_29320LP),
	ID(ID_AHA_39320),
	ID(ID_AHA_39320_B),
	ID(ID_AHA_39320A),
	ID(ID_AHA_39320D),
	ID(ID_AHA_39320D_HP),
	ID(ID_AHA_39320D_B),
	ID(ID_AHA_39320D_B_HP),
	/* Generic chip probes for devices we don't know exactly. */
	ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
	ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
	ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
	{ 0 }
};

MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);

static struct pci_driver aic79xx_pci_driver = {
	.name		= "aic79xx",
	.probe		= ahd_linux_pci_dev_probe,
	.remove		= ahd_linux_pci_dev_remove,
	.id_table	= ahd_linux_pci_id_table
};

static void
ahd_linux_pci_dev_remove(struct pci_dev *pdev)
{
	struct ahd_softc *ahd = pci_get_drvdata(pdev);
	u_long s;

	if (ahd->platform_data && ahd->platform_data->host)
			scsi_remove_host(ahd->platform_data->host);

	ahd_lock(ahd, &s);
	ahd_intr_enable(ahd, FALSE);
	ahd_unlock(ahd, &s);
	ahd_free(ahd);
}

static void
ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
{
	struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
	unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);

	master_pdev = pci_get_slot(pdev->bus, master_devfn);
	if (master_pdev) {
		struct ahd_softc *master = pci_get_drvdata(master_pdev);
		if (master) {
			ahd->flags &= ~AHD_BIOS_ENABLED;
			ahd->flags |= master->flags & AHD_BIOS_ENABLED;
		} else
			printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
		pci_dev_put(master_pdev);
	}
}

static int
ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	char		 buf[80];
	struct		 ahd_softc *ahd;
	ahd_dev_softc_t	 pci;
	struct		 ahd_pci_identity *entry;
	char		*name;
	int		 error;

	pci = pdev;
	entry = ahd_find_pci_device(pci);
	if (entry == NULL)
		return (-ENODEV);

	/*
	 * Allocate a softc for this card and
	 * set it up for attachment by our
	 * common detect routine.
	 */
	sprintf(buf, "ahd_pci:%d:%d:%d",
		ahd_get_pci_bus(pci),
		ahd_get_pci_slot(pci),
		ahd_get_pci_function(pci));
	name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
	if (name == NULL)
		return (-ENOMEM);
	strcpy(name, buf);
	ahd = ahd_alloc(NULL, name);
	if (ahd == NULL)
		return (-ENOMEM);
	if (pci_enable_device(pdev)) {
		ahd_free(ahd);
		return (-ENODEV);
	}
	pci_set_master(pdev);

	if (sizeof(dma_addr_t) > 4) {
		uint64_t   memsize;
		const uint64_t mask_39bit = 0x7FFFFFFFFFULL;

		memsize = ahd_linux_get_memsize();

		if (memsize >= 0x8000000000ULL
	 	 && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
			ahd->flags |= AHD_64BIT_ADDRESSING;
		} else if (memsize > 0x80000000
			&& pci_set_dma_mask(pdev, mask_39bit) == 0) {
			ahd->flags |= AHD_39BIT_ADDRESSING;
		}
	} else {
		pci_set_dma_mask(pdev, DMA_32BIT_MASK);
	}
	ahd->dev_softc = pci;
	error = ahd_pci_config(ahd, entry);
	if (error != 0) {
		ahd_free(ahd);
		return (-error);
	}

	/*
	 * Second Function PCI devices need to inherit some
	 * * settings from function 0.
	 */
	if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
		ahd_linux_pci_inherit_flags(ahd);

	pci_set_drvdata(pdev, ahd);

	ahd_linux_register_host(ahd, &aic79xx_driver_template);
	return (0);
}

int
ahd_linux_pci_init(void)
{
	return pci_register_driver(&aic79xx_pci_driver);
}

void
ahd_linux_pci_exit(void)
{
	pci_unregister_driver(&aic79xx_pci_driver);
}

static int
ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
				 u_long *base2)
{
	*base = pci_resource_start(ahd->dev_softc, 0);
	/*
	 * This is really the 3rd bar and should be at index 2,
	 * but the Linux PCI code doesn't know how to "count" 64bit
	 * bars.
	 */
	*base2 = pci_resource_start(ahd->dev_softc, 3);
	if (*base == 0 || *base2 == 0)
		return (ENOMEM);
	if (!request_region(*base, 256, "aic79xx"))
		return (ENOMEM);
	if (!request_region(*base2, 256, "aic79xx")) {
		release_region(*base, 256);
		return (ENOMEM);
	}
	return (0);
}

static int
ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
				 u_long *bus_addr,
				 uint8_t __iomem **maddr)
{
	u_long	start;
	u_long	base_page;
	u_long	base_offset;
	int	error = 0;

	if (aic79xx_allow_memio == 0)
		return (ENOMEM);

	if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
		return (ENOMEM);

	start = pci_resource_start(ahd->dev_softc, 1);
	base_page = start & PAGE_MASK;
	base_offset = start - base_page;
	if (start != 0) {
		*bus_addr = start;
		if (!request_mem_region(start, 0x1000, "aic79xx"))
			error = ENOMEM;
		if (!error) {
			*maddr = ioremap_nocache(base_page, base_offset + 512);
			if (*maddr == NULL) {
				error = ENOMEM;
				release_mem_region(start, 0x1000);
			} else
				*maddr += base_offset;
		}
	} else
		error = ENOMEM;
	return (error);
}

int
ahd_pci_map_registers(struct ahd_softc *ahd)
{
	uint32_t command;
	u_long	 base;
	uint8_t	__iomem *maddr;
	int	 error;

	/*
	 * If its allowed, we prefer memory mapped access.
	 */
	command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
	command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
	base = 0;
	maddr = NULL;
	error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
	if (error == 0) {
		ahd->platform_data->mem_busaddr = base;
		ahd->tags[0] = BUS_SPACE_MEMIO;
		ahd->bshs[0].maddr = maddr;
		ahd->tags[1] = BUS_SPACE_MEMIO;
		ahd->bshs[1].maddr = maddr + 0x100;
		ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
				     command | PCIM_CMD_MEMEN, 4);

		if (ahd_pci_test_register_access(ahd) != 0) {

			printf("aic79xx: PCI Device %d:%d:%d "
			       "failed memory mapped test.  Using PIO.\n",
			       ahd_get_pci_bus(ahd->dev_softc),
			       ahd_get_pci_slot(ahd->dev_softc),
			       ahd_get_pci_function(ahd->dev_softc));
			iounmap(maddr);
			release_mem_region(ahd->platform_data->mem_busaddr,
					   0x1000);
			ahd->bshs[0].maddr = NULL;
			maddr = NULL;
		} else
			command |= PCIM_CMD_MEMEN;
	} else if (bootverbose) {
		printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
		       "unavailable. Cannot memory map device.\n",
		       ahd_get_pci_bus(ahd->dev_softc),
		       ahd_get_pci_slot(ahd->dev_softc),
		       ahd_get_pci_function(ahd->dev_softc),
		       base);
	}

	if (maddr == NULL) {
		u_long	 base2;

		error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
		if (error == 0) {
			ahd->tags[0] = BUS_SPACE_PIO;
			ahd->tags[1] = BUS_SPACE_PIO;
			ahd->bshs[0].ioport = base;
			ahd->bshs[1].ioport = base2;
			command |= PCIM_CMD_PORTEN;
		} else {
			printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
			       "unavailable. Cannot map device.\n",
			       ahd_get_pci_bus(ahd->dev_softc),
			       ahd_get_pci_slot(ahd->dev_softc),
			       ahd_get_pci_function(ahd->dev_softc),
			       base, base2);
		}
	}
	ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
	return (error);
}

int
ahd_pci_map_int(struct ahd_softc *ahd)
{
	int error;

	error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
			    IRQF_SHARED, "aic79xx", ahd);
	if (!error)
		ahd->platform_data->irq = ahd->dev_softc->irq;
	
	return (-error);
}

void
ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
{
	pci_set_power_state(ahd->dev_softc, new_state);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Linux driver attachment glue for PCI based U320 controllers.
	3	*
	4	* Copyright (c) 2000-2001 Adaptec Inc.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions, and the following disclaimer,
	12	* without modification.
	13	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	14	* substantially similar to the "NO WARRANTY" disclaimer below
	15	* ("Disclaimer") and any redistribution must be conditioned upon
	16	* including a substantially similar Disclaimer requirement for further
	17	* binary redistribution.
	18	* 3. Neither the names of the above-listed copyright holders nor the names
	19	* of any contributors may be used to endorse or promote products derived
	20	* from this software without specific prior written permission.
	21	*
	22	* Alternatively, this software may be distributed under the terms of the
	23	* GNU General Public License ("GPL") version 2 as published by the Free
	24	* Software Foundation.
	25	*
	26	* NO WARRANTY
	27	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	28	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	29	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	30	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	31	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	32	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	33	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	34	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	35	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	36	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	37	* POSSIBILITY OF SUCH DAMAGES.
	38	*
	39	* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm_pci.c#25 $
	40	*/
	41
	42	#include "aic79xx_osm.h"
	43	#include "aic79xx_inline.h"
	44	#include "aic79xx_pci.h"
	45
	46	static int ahd_linux_pci_dev_probe(struct pci_dev *pdev,
	47	const struct pci_device_id *ent);
	48	static int ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
	49	u_long base, u_long base2);
	50	static int ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
	51	u_long *bus_addr,
	52	uint8_t __iomem **maddr);
	53	static void ahd_linux_pci_dev_remove(struct pci_dev *pdev);
	54
	55	/* Define the macro locally since it's different for different class of chips.
	56	*/
	57	#define ID(x) \
	58	ID2C(x), \
	59	ID2C(IDIROC(x))
	60
	61	static struct pci_device_id ahd_linux_pci_id_table[] = {
	62	/* aic7901 based controllers */
	63	ID(ID_AHA_29320A),
	64	ID(ID_AHA_29320ALP),
d32adcb8	65	ID(ID_AHA_29320LPE),
1da177e4 LT	66	/* aic7902 based controllers */
	67	ID(ID_AHA_29320),
	68	ID(ID_AHA_29320B),
	69	ID(ID_AHA_29320LP),
	70	ID(ID_AHA_39320),
	71	ID(ID_AHA_39320_B),
	72	ID(ID_AHA_39320A),
	73	ID(ID_AHA_39320D),
	74	ID(ID_AHA_39320D_HP),
	75	ID(ID_AHA_39320D_B),
	76	ID(ID_AHA_39320D_B_HP),
	77	/* Generic chip probes for devices we don't know exactly. */
	78	ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
	79	ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
	80	ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
	81	{ 0 }
	82	};
	83
	84	MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
	85
289fe5b1	86	static struct pci_driver aic79xx_pci_driver = {
1da177e4 LT	87	.name = "aic79xx",
	88	.probe = ahd_linux_pci_dev_probe,
	89	.remove = ahd_linux_pci_dev_remove,
	90	.id_table = ahd_linux_pci_id_table
	91	};
	92
	93	static void
	94	ahd_linux_pci_dev_remove(struct pci_dev *pdev)
	95	{
85a46523 CH	96	struct ahd_softc *ahd = pci_get_drvdata(pdev);
85a46523 CH	97	u_long s;
1da177e4	98
97af50f6 JB	99	if (ahd->platform_data && ahd->platform_data->host)
	100	scsi_remove_host(ahd->platform_data->host);
	101
85a46523 CH	102	ahd_lock(ahd, &s);
	103	ahd_intr_enable(ahd, FALSE);
	104	ahd_unlock(ahd, &s);
	105	ahd_free(ahd);
	106	}
	107
	108	static void
	109	ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
	110	{
	111	struct pci_dev pdev = ahd->dev_softc, master_pdev;
	112	unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
	113
	114	master_pdev = pci_get_slot(pdev->bus, master_devfn);
	115	if (master_pdev) {
	116	struct ahd_softc *master = pci_get_drvdata(master_pdev);
	117	if (master) {
	118	ahd->flags &= ~AHD_BIOS_ENABLED;
	119	ahd->flags \|= master->flags & AHD_BIOS_ENABLED;
	120	} else
	121	printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
	122	pci_dev_put(master_pdev);
	123	}
1da177e4 LT	124	}
	125
	126	static int
	127	ahd_linux_pci_dev_probe(struct pci_dev pdev, const struct pci_device_id ent)
	128	{
	129	char buf[80];
	130	struct ahd_softc *ahd;
	131	ahd_dev_softc_t pci;
	132	struct ahd_pci_identity *entry;
	133	char *name;
	134	int error;
	135
1da177e4 LT	136	pci = pdev;
	137	entry = ahd_find_pci_device(pci);
	138	if (entry == NULL)
	139	return (-ENODEV);
	140
	141	/*
	142	* Allocate a softc for this card and
	143	* set it up for attachment by our
	144	* common detect routine.
	145	*/
	146	sprintf(buf, "ahd_pci:%d:%d:%d",
	147	ahd_get_pci_bus(pci),
	148	ahd_get_pci_slot(pci),
	149	ahd_get_pci_function(pci));
	150	name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
	151	if (name == NULL)
	152	return (-ENOMEM);
	153	strcpy(name, buf);
	154	ahd = ahd_alloc(NULL, name);
	155	if (ahd == NULL)
	156	return (-ENOMEM);
	157	if (pci_enable_device(pdev)) {
	158	ahd_free(ahd);
	159	return (-ENODEV);
	160	}
	161	pci_set_master(pdev);
	162
	163	if (sizeof(dma_addr_t) > 4) {
	164	uint64_t memsize;
	165	const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
	166
	167	memsize = ahd_linux_get_memsize();
	168
	169	if (memsize >= 0x8000000000ULL
	170	&& pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
	171	ahd->flags \|= AHD_64BIT_ADDRESSING;
1da177e4 LT	172	} else if (memsize > 0x80000000
	173	&& pci_set_dma_mask(pdev, mask_39bit) == 0) {
	174	ahd->flags \|= AHD_39BIT_ADDRESSING;
1da177e4 LT	175	}
	176	} else {
	177	pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1da177e4 LT	178	}
	179	ahd->dev_softc = pci;
	180	error = ahd_pci_config(ahd, entry);
	181	if (error != 0) {
	182	ahd_free(ahd);
	183	return (-error);
	184	}
85a46523 CH	185
	186	/*
	187	* Second Function PCI devices need to inherit some
	188	* * settings from function 0.
	189	*/
	190	if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
	191	ahd_linux_pci_inherit_flags(ahd);
	192
1da177e4	193	pci_set_drvdata(pdev, ahd);
85a46523 CH	194
85a46523 CH	195	ahd_linux_register_host(ahd, &aic79xx_driver_template);
1da177e4 LT	196	return (0);
	197	}
	198
	199	int
	200	ahd_linux_pci_init(void)
	201	{
dcbccbde	202	return pci_register_driver(&aic79xx_pci_driver);
1da177e4 LT	203	}
	204
	205	void
	206	ahd_linux_pci_exit(void)
	207	{
	208	pci_unregister_driver(&aic79xx_pci_driver);
	209	}
	210
	211	static int
	212	ahd_linux_pci_reserve_io_regions(struct ahd_softc ahd, u_long base,
	213	u_long *base2)
	214	{
	215	*base = pci_resource_start(ahd->dev_softc, 0);
	216	/*
	217	* This is really the 3rd bar and should be at index 2,
	218	* but the Linux PCI code doesn't know how to "count" 64bit
	219	* bars.
	220	*/
	221	*base2 = pci_resource_start(ahd->dev_softc, 3);
	222	if (base == 0 \|\| base2 == 0)
	223	return (ENOMEM);
53467e63	224	if (!request_region(*base, 256, "aic79xx"))
1da177e4	225	return (ENOMEM);
53467e63 HR	226	if (!request_region(*base2, 256, "aic79xx")) {
53467e63 HR	227	release_region(*base, 256);
1da177e4 LT	228	return (ENOMEM);
	229	}
	230	return (0);
	231	}
	232
	233	static int
	234	ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
	235	u_long *bus_addr,
	236	uint8_t __iomem **maddr)
	237	{
	238	u_long start;
	239	u_long base_page;
	240	u_long base_offset;
53467e63	241	int error = 0;
1da177e4 LT	242
	243	if (aic79xx_allow_memio == 0)
	244	return (ENOMEM);
	245
	246	if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
	247	return (ENOMEM);
	248
1da177e4 LT	249	start = pci_resource_start(ahd->dev_softc, 1);
	250	base_page = start & PAGE_MASK;
	251	base_offset = start - base_page;
	252	if (start != 0) {
	253	*bus_addr = start;
53467e63	254	if (!request_mem_region(start, 0x1000, "aic79xx"))
1da177e4	255	error = ENOMEM;
53467e63 HR	256	if (!error) {
53467e63 HR	257	*maddr = ioremap_nocache(base_page, base_offset + 512);
1da177e4 LT	258	if (*maddr == NULL) {
	259	error = ENOMEM;
	260	release_mem_region(start, 0x1000);
	261	} else
	262	*maddr += base_offset;
	263	}
	264	} else
	265	error = ENOMEM;
	266	return (error);
	267	}
	268
	269	int
	270	ahd_pci_map_registers(struct ahd_softc *ahd)
	271	{
	272	uint32_t command;
	273	u_long base;
	274	uint8_t __iomem *maddr;
	275	int error;
	276
	277	/*
	278	* If its allowed, we prefer memory mapped access.
	279	*/
	280	command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
	281	command &= ~(PCIM_CMD_PORTEN\|PCIM_CMD_MEMEN);
	282	base = 0;
	283	maddr = NULL;
	284	error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
	285	if (error == 0) {
	286	ahd->platform_data->mem_busaddr = base;
	287	ahd->tags[0] = BUS_SPACE_MEMIO;
	288	ahd->bshs[0].maddr = maddr;
	289	ahd->tags[1] = BUS_SPACE_MEMIO;
	290	ahd->bshs[1].maddr = maddr + 0x100;
	291	ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
	292	command \| PCIM_CMD_MEMEN, 4);
	293
	294	if (ahd_pci_test_register_access(ahd) != 0) {
	295
	296	printf("aic79xx: PCI Device %d:%d:%d "
	297	"failed memory mapped test. Using PIO.\n",
	298	ahd_get_pci_bus(ahd->dev_softc),
	299	ahd_get_pci_slot(ahd->dev_softc),
	300	ahd_get_pci_function(ahd->dev_softc));
	301	iounmap(maddr);
	302	release_mem_region(ahd->platform_data->mem_busaddr,
	303	0x1000);
	304	ahd->bshs[0].maddr = NULL;
	305	maddr = NULL;
	306	} else
	307	command \|= PCIM_CMD_MEMEN;
	308	} else if (bootverbose) {
	309	printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
	310	"unavailable. Cannot memory map device.\n",
	311	ahd_get_pci_bus(ahd->dev_softc),
	312	ahd_get_pci_slot(ahd->dev_softc),
	313	ahd_get_pci_function(ahd->dev_softc),
	314	base);
	315	}
	316
	317	if (maddr == NULL) {
	318	u_long base2;
	319
	320	error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
	321	if (error == 0) {
322	ahd->tags[0] = BUS_SPACE_PIO;
323	ahd->tags[1] = BUS_SPACE_PIO;
324	ahd->bshs[0].ioport = base;
325	ahd->bshs[1].ioport = base2;
326	command \|= PCIM_CMD_PORTEN;
327	} else {
328	printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
329	"unavailable. Cannot map device.\n",
330	ahd_get_pci_bus(ahd->dev_softc),
331	ahd_get_pci_slot(ahd->dev_softc),
332	ahd_get_pci_function(ahd->dev_softc),
333	base, base2);
334	}
335	}
336	ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
337	return (error);
338	}
339
340	int
341	ahd_pci_map_int(struct ahd_softc *ahd)
342	{
343	int error;
344
345	error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
1d6f359a	346	IRQF_SHARED, "aic79xx", ahd);
53467e63	347	if (!error)
1da177e4 LT	348	ahd->platform_data->irq = ahd->dev_softc->irq;
	349
	350	return (-error);
	351	}
	352
	353	void
	354	ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
	355	{
	356	pci_set_power_state(ahd->dev_softc, new_state);
	357	}