[mirror_ubuntu-jammy-kernel.git] / drivers / parisc / hppb.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
** hppb.c:
**      HP-PB bus driver for the NOVA and K-Class systems.
**
**      (c) Copyright 2002 Ryan Bradetich
**      (c) Copyright 2002 Hewlett-Packard Company
**
**
*/

#include <linux/types.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/ioport.h>

#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/parisc-device.h>

#include "iommu.h"

struct hppb_card {
	unsigned long hpa;
	struct resource mmio_region;
	struct hppb_card *next;
};

static struct hppb_card hppb_card_head = {
	.hpa = 0,
	.next = NULL,
};

#define IO_IO_LOW  offsetof(struct bc_module, io_io_low)
#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)

/**
 * hppb_probe - Determine if the hppb driver should claim this device.
 * @dev: The device which has been found
 *
 * Determine if hppb driver should claim this chip (return 0) or not 
 * (return 1). If so, initialize the chip and tell other partners in crime 
 * they have work to do.
 */
static int __init hppb_probe(struct parisc_device *dev)
{
	int status;
	struct hppb_card *card = &hppb_card_head;

	while(card->next) {
		card = card->next;
	}

	if(card->hpa) {
		card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL);
		if(!card->next) {
			printk(KERN_ERR "HP-PB: Unable to allocate memory.\n");
			return 1;
		}
		card = card->next;
	}
	printk(KERN_INFO "Found GeckoBoa at 0x%llx\n",
			(unsigned long long) dev->hpa.start);

	card->hpa = dev->hpa.start;
	card->mmio_region.name = "HP-PB Bus";
	card->mmio_region.flags = IORESOURCE_MEM;

	card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW);
	card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1;

	status = ccio_request_resource(dev, &card->mmio_region);
	if(status < 0) {
		printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n",
			__FILE__, &card->mmio_region);
	}

        return 0;
}

static const struct parisc_device_id hppb_tbl[] __initconst = {
        { HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */
        { HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */
        { HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */
        { HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */
        { 0, }
};

static struct parisc_driver hppb_driver __refdata = {
        .name =         "gecko_boa",
        .id_table =     hppb_tbl,
	.probe =        hppb_probe,
};

/**
 * hppb_init - HP-PB bus initialization procedure.
 *
 * Register this driver.   
 */
void __init hppb_init(void)
{
        register_parisc_driver(&hppb_driver);
}
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	** hppb.c:
	4	** HP-PB bus driver for the NOVA and K-Class systems.
	5	**
	6	** (c) Copyright 2002 Ryan Bradetich
	7	** (c) Copyright 2002 Hewlett-Packard Company
	8	**
1da177e4	9	**
1da177e4 LT	10	*/
	11
	12	#include <linux/types.h>
	13	#include <linux/init.h>
	14	#include <linux/mm.h>
	15	#include <linux/slab.h>
bec85e80	16	#include <linux/dma-mapping.h>
1da177e4 LT	17	#include <linux/ioport.h>
	18
	19	#include <asm/io.h>
	20	#include <asm/hardware.h>
	21	#include <asm/parisc-device.h>
	22
9b8eeab0 CH	23	#include "iommu.h"
9b8eeab0 CH	24
1da177e4 LT	25	struct hppb_card {
	26	unsigned long hpa;
	27	struct resource mmio_region;
	28	struct hppb_card *next;
	29	};
	30
df8e5bc6	31	static struct hppb_card hppb_card_head = {
1da177e4 LT	32	.hpa = 0,
	33	.next = NULL,
	34	};
	35
	36	#define IO_IO_LOW offsetof(struct bc_module, io_io_low)
	37	#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)
	38
	39	/**
	40	* hppb_probe - Determine if the hppb driver should claim this device.
	41	* @dev: The device which has been found
	42	*
	43	* Determine if hppb driver should claim this chip (return 0) or not
	44	* (return 1). If so, initialize the chip and tell other partners in crime
	45	* they have work to do.
	46	*/
cfe4fbfb	47	static int __init hppb_probe(struct parisc_device *dev)
1da177e4 LT	48	{
	49	int status;
	50	struct hppb_card *card = &hppb_card_head;
	51
	52	while(card->next) {
	53	card = card->next;
	54	}
	55
	56	if(card->hpa) {
cb6fc18e	57	card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL);
1da177e4 LT	58	if(!card->next) {
	59	printk(KERN_ERR "HP-PB: Unable to allocate memory.\n");
	60	return 1;
	61	}
1da177e4 LT	62	card = card->next;
1da177e4 LT	63	}
cae5a39f HD	64	printk(KERN_INFO "Found GeckoBoa at 0x%llx\n",
cae5a39f HD	65	(unsigned long long) dev->hpa.start);
1da177e4	66
53f01bba	67	card->hpa = dev->hpa.start;
1da177e4 LT	68	card->mmio_region.name = "HP-PB Bus";
	69	card->mmio_region.flags = IORESOURCE_MEM;
	70
53f01bba MW	71	card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW);
53f01bba MW	72	card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1;
1da177e4 LT	73
	74	status = ccio_request_resource(dev, &card->mmio_region);
	75	if(status < 0) {
3fad9b8d JP	76	printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n",
3fad9b8d JP	77	__FILE__, &card->mmio_region);
1da177e4 LT	78	}
	79
	80	return 0;
	81	}
	82
cfe4fbfb	83	static const struct parisc_device_id hppb_tbl[] __initconst = {
075b8783 RB	84	{ HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */
	85	{ HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */
	86	{ HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */
	87	{ HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */
1da177e4 LT	88	{ 0, }
	89	};
	90
cfe4fbfb	91	static struct parisc_driver hppb_driver __refdata = {
bdad1f83	92	.name = "gecko_boa",
1da177e4 LT	93	.id_table = hppb_tbl,
	94	.probe = hppb_probe,
	95	};
	96
	97	/**
4f63ba17	98	* hppb_init - HP-PB bus initialization procedure.
1da177e4 LT	99	*
	100	* Register this driver.
	101	*/
	102	void __init hppb_init(void)
	103	{
	104	register_parisc_driver(&hppb_driver);
	105	}