diff options
Diffstat (limited to 'drivers/ide/legacy/gayle.c')
| -rw-r--r-- | drivers/ide/legacy/gayle.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/drivers/ide/legacy/gayle.c b/drivers/ide/legacy/gayle.c new file mode 100644 index 000000000000..3fac3e9ec47d --- /dev/null +++ b/drivers/ide/legacy/gayle.c @@ -0,0 +1,186 @@ +/* + * 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/config.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 <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, &hwif); + if (index != -1) { + hwif->mmio = 2; + 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); + } +} |