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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | /* * 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); } /* Atari has a byte-swapped IDE interface */ static const struct ide_tp_ops falconide_tp_ops = { .exec_command = ide_exec_command, .read_status = ide_read_status, .read_altstatus = ide_read_altstatus, .read_sff_dma_status = ide_read_sff_dma_status, .set_irq = ide_set_irq, .tf_load = ide_tf_load, .tf_read = ide_tf_read, .input_data = falconide_input_data, .output_data = falconide_output_data, }; static const struct ide_port_info falconide_port_info = { .tp_ops = &falconide_tp_ops, .host_flags = IDE_HFLAG_NO_DMA, }; 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) { struct ide_host *host; hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; int rc; if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE)) return -ENODEV; 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); host = ide_host_alloc(&falconide_port_info, hws); if (host == NULL) { rc = -ENOMEM; goto err; } ide_get_lock(NULL, NULL); rc = ide_host_register(host, &falconide_port_info, hws); ide_release_lock(); if (rc) goto err_free; return 0; err_free: ide_host_free(host); err: release_mem_region(ATA_HD_BASE, 0x40); return rc; } module_init(falconide_init); MODULE_LICENSE("GPL"); |