diff options
Diffstat (limited to 'drivers/parisc/hppb.c')
| -rw-r--r-- | drivers/parisc/hppb.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/parisc/hppb.c b/drivers/parisc/hppb.c new file mode 100644 index 000000000..898208e4f --- /dev/null +++ b/drivers/parisc/hppb.c @@ -0,0 +1,106 @@ +/* +** 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); +} |