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104 lines
2.5 KiB
104 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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** hppb.c: |
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** HP-PB bus driver for the NOVA and K-Class systems. |
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** |
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** (c) Copyright 2002 Ryan Bradetich |
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** (c) Copyright 2002 Hewlett-Packard Company |
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** |
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** |
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*/ |
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#include <linux/types.h> |
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#include <linux/init.h> |
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#include <linux/mm.h> |
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#include <linux/slab.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/ioport.h> |
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#include <asm/io.h> |
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#include <asm/hardware.h> |
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#include <asm/parisc-device.h> |
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#include "iommu.h" |
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struct hppb_card { |
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unsigned long hpa; |
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struct resource mmio_region; |
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struct hppb_card *next; |
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}; |
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static struct hppb_card hppb_card_head = { |
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.hpa = 0, |
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.next = NULL, |
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}; |
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#define IO_IO_LOW offsetof(struct bc_module, io_io_low) |
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#define IO_IO_HIGH offsetof(struct bc_module, io_io_high) |
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/** |
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* hppb_probe - Determine if the hppb driver should claim this device. |
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* @dev: The device which has been found |
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* |
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* Determine if hppb driver should claim this chip (return 0) or not |
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* (return 1). If so, initialize the chip and tell other partners in crime |
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* they have work to do. |
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*/ |
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static int __init hppb_probe(struct parisc_device *dev) |
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{ |
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int status; |
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struct hppb_card *card = &hppb_card_head; |
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while(card->next) { |
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card = card->next; |
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} |
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if(card->hpa) { |
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card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL); |
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if(!card->next) { |
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printk(KERN_ERR "HP-PB: Unable to allocate memory.\n"); |
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return 1; |
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} |
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card = card->next; |
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} |
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card->hpa = dev->hpa.start; |
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card->mmio_region.name = "HP-PB Bus"; |
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card->mmio_region.flags = IORESOURCE_MEM; |
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card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW); |
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card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1; |
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status = ccio_request_resource(dev, &card->mmio_region); |
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pr_info("Found GeckoBoa at %pap, bus space %pR,%s claimed.\n", |
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&dev->hpa.start, |
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&card->mmio_region, |
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(status < 0) ? " not":"" ); |
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return 0; |
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} |
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static const struct parisc_device_id hppb_tbl[] __initconst = { |
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{ HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */ |
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{ HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */ |
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{ HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */ |
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{ HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */ |
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{ 0, } |
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}; |
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static struct parisc_driver hppb_driver __refdata = { |
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.name = "gecko_boa", |
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.id_table = hppb_tbl, |
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.probe = hppb_probe, |
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}; |
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/** |
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* hppb_init - HP-PB bus initialization procedure. |
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* |
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* Register this driver. |
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*/ |
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void __init hppb_init(void) |
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{ |
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register_parisc_driver(&hppb_driver); |
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}
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