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