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- /*
- ** hppb.c:
- ** HP-PB bus driver for the NOVA and K-Class systems.
- **
- ** (c) Copyright 2002 Ryan Bradetich
- ** (c) Copyright 2002 Hewlett-Packard Company
- **
- ** 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/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>
- 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 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 struct parisc_device_id hppb_tbl[] = {
- { 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 = {
- .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);
- }
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