/* * Amiga Gayle IDE Driver * * Created 9 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/types.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/blkdev.h> #include <linux/ide.h> #include <linux/init.h> #include <linux/zorro.h> #include <linux/module.h> #include <asm/setup.h> #include <asm/amigahw.h> #include <asm/amigaints.h> #include <asm/amigayle.h> /* * Bases of the IDE interfaces */ #define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */ #define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */ #define GAYLE_IDEREG_SIZE 0x2000 /* * Offsets from one of the above bases */ #define GAYLE_CONTROL 0x101a /* * These are at different offsets from the base */ #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */ #define GAYLE_IRQ_1200 0xda9000 /* interrupt */ /* * Offset of the secondary port for IDE doublers * Note that GAYLE_CONTROL is NOT available then! */ #define GAYLE_NEXT_PORT 0x1000 #define GAYLE_NUM_HWIFS 2 #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \ GAYLE_NUM_HWIFS-1) #define GAYLE_HAS_CONTROL_REG (!ide_doubler) static int ide_doubler; module_param_named(doubler, ide_doubler, bool, 0); MODULE_PARM_DESC(doubler, "enable support for IDE doublers"); /* * Check and acknowledge the interrupt status */ static int gayle_ack_intr_a4000(ide_hwif_t *hwif) { unsigned char ch; ch = z_readb(hwif->io_ports.irq_addr); if (!(ch & GAYLE_IRQ_IDE)) return 0; return 1; } static int gayle_ack_intr_a1200(ide_hwif_t *hwif) { unsigned char ch; ch = z_readb(hwif->io_ports.irq_addr); if (!(ch & GAYLE_IRQ_IDE)) return 0; (void)z_readb(hwif->io_ports.status_addr); z_writeb(0x7c, hwif->io_ports.irq_addr); return 1; } static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base, unsigned long ctl, unsigned long irq_port, ide_ack_intr_t *ack_intr) { int i; memset(hw, 0, sizeof(*hw)); hw->io_ports.data_addr = base; for (i = 1; i < 8; i++) hw->io_ports_array[i] = base + 2 + i * 4; hw->io_ports.ctl_addr = ctl; hw->io_ports.irq_addr = irq_port; hw->irq = IRQ_AMIGA_PORTS; hw->ack_intr = ack_intr; } static const struct ide_port_info gayle_port_info = { .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA, .irq_flags = IRQF_SHARED, .chipset = ide_generic, }; /* * Probe for a Gayle IDE interface (and optionally for an IDE doubler) */ static int __init gayle_init(void) { unsigned long phys_base, res_start, res_n; unsigned long base, ctrlport, irqport; ide_ack_intr_t *ack_intr; int a4000, i, rc; struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS]; if (!MACH_IS_AMIGA) return -ENODEV; if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE)) goto found; #ifdef CONFIG_ZORRO if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE, NULL)) goto found; #endif return -ENODEV; found: printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n", a4000 ? 4000 : 1200, ide_doubler ? ", IDE doubler" : ""); if (a4000) { phys_base = GAYLE_BASE_4000; irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); ack_intr = gayle_ack_intr_a4000; } else { phys_base = GAYLE_BASE_1200; irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200); ack_intr = gayle_ack_intr_a1200; } res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); res_n = GAYLE_IDEREG_SIZE; if (!request_mem_region(res_start, res_n, "IDE")) return -EBUSY; for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT); ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; gayle_setup_ports(&hw[i], base, ctrlport, irqport, ack_intr); hws[i] = &hw[i]; } rc = ide_host_add(&gayle_port_info, hws, i, NULL); if (rc) release_mem_region(res_start, res_n); return rc; } module_init(gayle_init); MODULE_LICENSE("GPL");