gayle.c revision f4d3ffa52a402ec9e8699571cf3811763d284459
1/* 2 * Amiga Gayle IDE Driver 3 * 4 * Created 9 Jul 1997 by Geert Uytterhoeven 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file COPYING in the main directory of this archive for 8 * more details. 9 */ 10 11#include <linux/types.h> 12#include <linux/mm.h> 13#include <linux/interrupt.h> 14#include <linux/blkdev.h> 15#include <linux/ide.h> 16#include <linux/init.h> 17#include <linux/zorro.h> 18#include <linux/module.h> 19 20#include <asm/setup.h> 21#include <asm/amigahw.h> 22#include <asm/amigaints.h> 23#include <asm/amigayle.h> 24 25 26 /* 27 * Bases of the IDE interfaces 28 */ 29 30#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */ 31#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */ 32 33#define GAYLE_IDEREG_SIZE 0x2000 34 35 /* 36 * Offsets from one of the above bases 37 */ 38 39#define GAYLE_CONTROL 0x101a 40 41 /* 42 * These are at different offsets from the base 43 */ 44 45#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */ 46#define GAYLE_IRQ_1200 0xda9000 /* interrupt */ 47 48 49 /* 50 * Offset of the secondary port for IDE doublers 51 * Note that GAYLE_CONTROL is NOT available then! 52 */ 53 54#define GAYLE_NEXT_PORT 0x1000 55 56#define GAYLE_NUM_HWIFS 2 57#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \ 58 GAYLE_NUM_HWIFS-1) 59#define GAYLE_HAS_CONTROL_REG (!ide_doubler) 60 61static int ide_doubler; 62module_param_named(doubler, ide_doubler, bool, 0); 63MODULE_PARM_DESC(doubler, "enable support for IDE doublers"); 64 65 /* 66 * Check and acknowledge the interrupt status 67 */ 68 69static int gayle_test_irq(ide_hwif_t *hwif) 70{ 71 unsigned char ch; 72 73 ch = z_readb(hwif->io_ports.irq_addr); 74 if (!(ch & GAYLE_IRQ_IDE)) 75 return 0; 76 return 1; 77} 78 79static void gayle_a1200_clear_irq(ide_drive_t *drive) 80{ 81 ide_hwif_t *hwif = drive->hwif; 82 83 (void)z_readb(hwif->io_ports.status_addr); 84 z_writeb(0x7c, hwif->io_ports.irq_addr); 85} 86 87static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base, 88 unsigned long ctl, unsigned long irq_port) 89{ 90 int i; 91 92 memset(hw, 0, sizeof(*hw)); 93 94 hw->io_ports.data_addr = base; 95 96 for (i = 1; i < 8; i++) 97 hw->io_ports_array[i] = base + 2 + i * 4; 98 99 hw->io_ports.ctl_addr = ctl; 100 hw->io_ports.irq_addr = irq_port; 101 102 hw->irq = IRQ_AMIGA_PORTS; 103} 104 105static const struct ide_port_ops gayle_a4000_port_ops = { 106 .test_irq = gayle_test_irq, 107}; 108 109static const struct ide_port_ops gayle_a1200_port_ops = { 110 .clear_irq = gayle_a1200_clear_irq, 111 .test_irq = gayle_test_irq, 112}; 113 114static const struct ide_port_info gayle_port_info = { 115 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE | 116 IDE_HFLAG_NO_DMA, 117 .irq_flags = IRQF_SHARED, 118 .chipset = ide_generic, 119}; 120 121 /* 122 * Probe for a Gayle IDE interface (and optionally for an IDE doubler) 123 */ 124 125static int __init gayle_init(void) 126{ 127 unsigned long phys_base, res_start, res_n; 128 unsigned long base, ctrlport, irqport; 129 int a4000, i, rc; 130 struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS]; 131 struct ide_port_info d = gayle_port_info; 132 133 if (!MACH_IS_AMIGA) 134 return -ENODEV; 135 136 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE)) 137 goto found; 138 139#ifdef CONFIG_ZORRO 140 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE, 141 NULL)) 142 goto found; 143#endif 144 return -ENODEV; 145 146found: 147 printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n", 148 a4000 ? 4000 : 1200, 149 ide_doubler ? ", IDE doubler" : ""); 150 151 if (a4000) { 152 phys_base = GAYLE_BASE_4000; 153 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); 154 d.port_ops = &gayle_a4000_port_ops; 155 } else { 156 phys_base = GAYLE_BASE_1200; 157 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200); 158 d.port_ops = &gayle_a1200_port_ops; 159 } 160 161 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); 162 res_n = GAYLE_IDEREG_SIZE; 163 164 if (!request_mem_region(res_start, res_n, "IDE")) 165 return -EBUSY; 166 167 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { 168 base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT); 169 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; 170 171 gayle_setup_ports(&hw[i], base, ctrlport, irqport); 172 173 hws[i] = &hw[i]; 174 } 175 176 rc = ide_host_add(&d, hws, i, NULL); 177 if (rc) 178 release_mem_region(res_start, res_n); 179 180 return rc; 181} 182 183module_init(gayle_init); 184 185MODULE_LICENSE("GPL"); 186