186 lines
4.3 KiB
C
186 lines
4.3 KiB
C
/*
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* Amiga Gayle IDE Driver
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*
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* Created 9 Jul 1997 by Geert Uytterhoeven
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/blkdev.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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#include <linux/zorro.h>
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#include <linux/module.h>
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#include <asm/setup.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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#include <asm/amigayle.h>
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/*
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* Bases of the IDE interfaces
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*/
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#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
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#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
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#define GAYLE_IDEREG_SIZE 0x2000
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/*
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* Offsets from one of the above bases
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*/
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#define GAYLE_CONTROL 0x101a
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/*
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* These are at different offsets from the base
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*/
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#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
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#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
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/*
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* Offset of the secondary port for IDE doublers
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* Note that GAYLE_CONTROL is NOT available then!
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*/
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#define GAYLE_NEXT_PORT 0x1000
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#define GAYLE_NUM_HWIFS 2
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#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
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GAYLE_NUM_HWIFS-1)
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#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
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static int ide_doubler;
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module_param_named(doubler, ide_doubler, bool, 0);
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MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
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/*
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* Check and acknowledge the interrupt status
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*/
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static int gayle_test_irq(ide_hwif_t *hwif)
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{
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unsigned char ch;
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ch = z_readb(hwif->io_ports.irq_addr);
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if (!(ch & GAYLE_IRQ_IDE))
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return 0;
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return 1;
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}
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static void gayle_a1200_clear_irq(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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(void)z_readb(hwif->io_ports.status_addr);
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z_writeb(0x7c, hwif->io_ports.irq_addr);
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}
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static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
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unsigned long ctl, unsigned long irq_port)
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{
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int i;
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memset(hw, 0, sizeof(*hw));
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hw->io_ports.data_addr = base;
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for (i = 1; i < 8; i++)
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hw->io_ports_array[i] = base + 2 + i * 4;
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hw->io_ports.ctl_addr = ctl;
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hw->io_ports.irq_addr = irq_port;
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hw->irq = IRQ_AMIGA_PORTS;
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}
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static const struct ide_port_ops gayle_a4000_port_ops = {
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.test_irq = gayle_test_irq,
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};
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static const struct ide_port_ops gayle_a1200_port_ops = {
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.clear_irq = gayle_a1200_clear_irq,
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.test_irq = gayle_test_irq,
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};
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static const struct ide_port_info gayle_port_info = {
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.host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
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IDE_HFLAG_NO_DMA,
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.irq_flags = IRQF_SHARED,
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.chipset = ide_generic,
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};
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/*
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* Probe for a Gayle IDE interface (and optionally for an IDE doubler)
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*/
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static int __init gayle_init(void)
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{
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unsigned long phys_base, res_start, res_n;
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unsigned long base, ctrlport, irqport;
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int a4000, i, rc;
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struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
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struct ide_port_info d = gayle_port_info;
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if (!MACH_IS_AMIGA)
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return -ENODEV;
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if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
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goto found;
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#ifdef CONFIG_ZORRO
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if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
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NULL))
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goto found;
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#endif
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return -ENODEV;
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found:
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printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
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a4000 ? 4000 : 1200,
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ide_doubler ? ", IDE doubler" : "");
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if (a4000) {
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phys_base = GAYLE_BASE_4000;
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irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
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d.port_ops = &gayle_a4000_port_ops;
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} else {
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phys_base = GAYLE_BASE_1200;
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irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
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d.port_ops = &gayle_a1200_port_ops;
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}
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res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
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res_n = GAYLE_IDEREG_SIZE;
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if (!request_mem_region(res_start, res_n, "IDE"))
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return -EBUSY;
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for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
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base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT);
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ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
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gayle_setup_ports(&hw[i], base, ctrlport, irqport);
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hws[i] = &hw[i];
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}
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rc = ide_host_add(&d, hws, i, NULL);
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if (rc)
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release_mem_region(res_start, res_n);
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return rc;
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}
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module_init(gayle_init);
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MODULE_LICENSE("GPL");
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