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falconide.c
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/* * Atari Falcon IDE Driver * * Created 12 Jul 1997 by Geert Uytterhoeven * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive for * more details. */ #include <linux/module.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/blkdev.h> #include <linux/hdreg.h> #include <linux/ide.h> #include <linux/init.h> #include <asm/setup.h> #include <asm/atarihw.h> #include <asm/atariints.h> #include <asm/atari_stdma.h> #define DRV_NAME "falconide" /* * Base of the IDE interface */ #define ATA_HD_BASE 0xfff00000 /* * Offsets from the above base */ #define ATA_HD_CONTROL 0x39 /* * falconide_intr_lock is used to obtain access to the IDE interrupt, * which is shared between several drivers. */ int falconide_intr_lock; EXPORT_SYMBOL(falconide_intr_lock); static void falconide_input_data(ide_drive_t *drive, struct request *rq, void *buf, unsigned int len) { unsigned long data_addr = drive->hwif->io_ports.data_addr; if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS) return insw(data_addr, buf, (len + 1) / 2); insw_swapw(data_addr, buf, (len + 1) / 2); } static void falconide_output_data(ide_drive_t *drive, struct request *rq, void *buf, unsigned int len) { unsigned long data_addr = drive->hwif->io_ports.data_addr; if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS) return outsw(data_addr, buf, (len + 1) / 2); outsw_swapw(data_addr, buf, (len + 1) / 2); } static void __init falconide_setup_ports(hw_regs_t *hw) { int i; memset(hw, 0, sizeof(*hw)); hw->io_ports.data_addr = ATA_HD_BASE; for (i = 1; i < 8; i++) hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4; hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL; hw->irq = IRQ_MFP_IDE; hw->ack_intr = NULL; hw->chipset = ide_generic; } /* * Probe for a Falcon IDE interface */ static int __init falconide_init(void) { hw_regs_t hw; ide_hwif_t *hwif; if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE)) return 0; printk(KERN_INFO "ide: Falcon IDE controller\n"); if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) { printk(KERN_ERR "%s: resources busy\n", DRV_NAME); return -EBUSY; } falconide_setup_ports(&hw); hwif = ide_find_port(); if (hwif) { u8 index = hwif->index; u8 idx[4] = { index, 0xff, 0xff, 0xff }; ide_init_port_data(hwif, index); ide_init_port_hw(hwif, &hw); /* Atari has a byte-swapped IDE interface */ hwif->input_data = falconide_input_data; hwif->output_data = falconide_output_data; ide_get_lock(NULL, NULL); ide_device_add(idx, NULL); ide_release_lock(); } return 0; } module_init(falconide_init); MODULE_LICENSE("GPL");
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