/* * linux/drivers/ide/legacy/gayle.c -- 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/hdreg.h> #include <linux/ide.h> #include <linux/init.h> #include <linux/zorro.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 */ /* * Offsets from one of the above bases */ #define GAYLE_DATA 0x00 #define GAYLE_ERROR 0x06 /* see err-bits */ #define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */ #define GAYLE_SECTOR 0x0e /* starting sector */ #define GAYLE_LCYL 0x12 /* starting cylinder */ #define GAYLE_HCYL 0x16 /* high byte of starting cyl */ #define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */ #define GAYLE_STATUS 0x1e /* see status-bits */ #define GAYLE_CONTROL 0x101a static int gayle_offsets[IDE_NR_PORTS] __initdata = { GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL, GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1 }; /* * 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 #ifndef CONFIG_BLK_DEV_IDEDOUBLER #define GAYLE_NUM_HWIFS 1 #define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS #define GAYLE_HAS_CONTROL_REG 1 #define GAYLE_IDEREG_SIZE 0x2000 #else /* CONFIG_BLK_DEV_IDEDOUBLER */ #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) #define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000) int ide_doubler = 0; /* support IDE doublers? */ #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ /* * 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[IDE_IRQ_OFFSET]); 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[IDE_IRQ_OFFSET]); if (!(ch & GAYLE_IRQ_IDE)) return 0; (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]); z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]); return 1; } /* * Probe for a Gayle IDE interface (and optionally for an IDE doubler) */ void __init gayle_init(void) { int a4000, i; if (!MACH_IS_AMIGA) return; 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; found: for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { unsigned long base, ctrlport, irqport; ide_ack_intr_t *ack_intr; hw_regs_t hw; ide_hwif_t *hwif; int index; unsigned long phys_base, res_start, res_n; 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; } /* * FIXME: we now have selectable modes between mmio v/s iomio */ phys_base += i*GAYLE_NEXT_PORT; res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); res_n = GAYLE_IDEREG_SIZE; if (!request_mem_region(res_start, res_n, "IDE")) continue; base = (unsigned long)ZTWO_VADDR(phys_base); ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; ide_setup_ports(&hw, base, gayle_offsets, ctrlport, irqport, ack_intr, // &gayle_iops, IRQ_AMIGA_PORTS); index = ide_register_hw(&hw, 1, &hwif); if (index != -1) { hwif->mmio = 1; switch (i) { case 0: printk("ide%d: Gayle IDE interface (A%d style)\n", index, a4000 ? 4000 : 1200); break; #ifdef CONFIG_BLK_DEV_IDEDOUBLER case 1: printk("ide%d: IDE doubler\n", index); break; #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ } } else release_mem_region(res_start, res_n); } }