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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | /* * 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 <linux/platform_device.h> #include <asm/setup.h> #include <asm/amigahw.h> #include <asm/amigaints.h> #include <asm/amigayle.h> /* * 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 bool 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_test_irq(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 void gayle_a1200_clear_irq(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; (void)z_readb(hwif->io_ports.status_addr); z_writeb(0x7c, hwif->io_ports.irq_addr); } static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base, unsigned long ctl, unsigned long irq_port) { 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; } static const struct ide_port_ops gayle_a4000_port_ops = { .test_irq = gayle_test_irq, }; static const struct ide_port_ops gayle_a1200_port_ops = { .clear_irq = gayle_a1200_clear_irq, .test_irq = gayle_test_irq, }; 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 amiga_gayle_ide_probe(struct platform_device *pdev) { struct resource *res; struct gayle_ide_platform_data *pdata; unsigned long base, ctrlport, irqport; unsigned int i; int error; struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS]; struct ide_port_info d = gayle_port_info; struct ide_host *host; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; if (!request_mem_region(res->start, resource_size(res), "IDE")) return -EBUSY; pdata = pdev->dev.platform_data; pr_info("ide: Gayle IDE controller (A%u style%s)\n", pdata->explicit_ack ? 1200 : 4000, ide_doubler ? ", IDE doubler" : ""); base = (unsigned long)ZTWO_VADDR(pdata->base); ctrlport = 0; irqport = (unsigned long)ZTWO_VADDR(pdata->irqport); if (pdata->explicit_ack) d.port_ops = &gayle_a1200_port_ops; else d.port_ops = &gayle_a4000_port_ops; for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++, base += GAYLE_NEXT_PORT) { if (GAYLE_HAS_CONTROL_REG) ctrlport = base + GAYLE_CONTROL; gayle_setup_ports(&hw[i], base, ctrlport, irqport); hws[i] = &hw[i]; } error = ide_host_add(&d, hws, i, &host); if (error) goto out; platform_set_drvdata(pdev, host); return 0; out: release_mem_region(res->start, resource_size(res)); return error; } static int __exit amiga_gayle_ide_remove(struct platform_device *pdev) { struct ide_host *host = platform_get_drvdata(pdev); struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ide_host_remove(host); release_mem_region(res->start, resource_size(res)); return 0; } static struct platform_driver amiga_gayle_ide_driver = { .remove = __exit_p(amiga_gayle_ide_remove), .driver = { .name = "amiga-gayle-ide", .owner = THIS_MODULE, }, }; static int __init amiga_gayle_ide_init(void) { return platform_driver_probe(&amiga_gayle_ide_driver, amiga_gayle_ide_probe); } module_init(amiga_gayle_ide_init); static void __exit amiga_gayle_ide_exit(void) { platform_driver_unregister(&amiga_gayle_ide_driver); } module_exit(amiga_gayle_ide_exit); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:amiga-gayle-ide"); |