/* ** 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 (0x%08llx, 0x%08llx)\n", __FILE__, (unsigned long long) card->mmio_region.start, (unsigned long long) card->mmio_region.end); } 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); }