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188 lines
4.4 KiB
188 lines
4.4 KiB
/* |
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* Amiga Gayle IDE Driver |
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* |
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* Created 9 Jul 1997 by Geert Uytterhoeven |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive for |
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* more details. |
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*/ |
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#include <linux/types.h> |
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#include <linux/mm.h> |
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#include <linux/interrupt.h> |
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#include <linux/blkdev.h> |
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#include <linux/ide.h> |
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#include <linux/init.h> |
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#include <linux/zorro.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <asm/setup.h> |
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#include <asm/amigahw.h> |
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#include <asm/amigaints.h> |
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#include <asm/amigayle.h> |
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/* |
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* Offsets from one of the above bases |
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*/ |
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#define GAYLE_CONTROL 0x101a |
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/* |
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* These are at different offsets from the base |
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*/ |
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#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */ |
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#define GAYLE_IRQ_1200 0xda9000 /* interrupt */ |
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/* |
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* Offset of the secondary port for IDE doublers |
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* Note that GAYLE_CONTROL is NOT available then! |
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*/ |
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#define GAYLE_NEXT_PORT 0x1000 |
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#define GAYLE_NUM_HWIFS 2 |
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#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \ |
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GAYLE_NUM_HWIFS-1) |
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#define GAYLE_HAS_CONTROL_REG (!ide_doubler) |
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static bool ide_doubler; |
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module_param_named(doubler, ide_doubler, bool, 0); |
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MODULE_PARM_DESC(doubler, "enable support for IDE doublers"); |
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/* |
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* Check and acknowledge the interrupt status |
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*/ |
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static int gayle_test_irq(ide_hwif_t *hwif) |
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{ |
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unsigned char ch; |
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ch = z_readb(hwif->io_ports.irq_addr); |
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if (!(ch & GAYLE_IRQ_IDE)) |
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return 0; |
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return 1; |
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} |
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static void gayle_a1200_clear_irq(ide_drive_t *drive) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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(void)z_readb(hwif->io_ports.status_addr); |
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z_writeb(0x7c, hwif->io_ports.irq_addr); |
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} |
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static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base, |
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unsigned long ctl, unsigned long irq_port) |
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{ |
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int i; |
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memset(hw, 0, sizeof(*hw)); |
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hw->io_ports.data_addr = base; |
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for (i = 1; i < 8; i++) |
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hw->io_ports_array[i] = base + 2 + i * 4; |
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hw->io_ports.ctl_addr = ctl; |
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hw->io_ports.irq_addr = irq_port; |
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hw->irq = IRQ_AMIGA_PORTS; |
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} |
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static const struct ide_port_ops gayle_a4000_port_ops = { |
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.test_irq = gayle_test_irq, |
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}; |
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static const struct ide_port_ops gayle_a1200_port_ops = { |
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.clear_irq = gayle_a1200_clear_irq, |
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.test_irq = gayle_test_irq, |
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}; |
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static const struct ide_port_info gayle_port_info = { |
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.host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE | |
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IDE_HFLAG_NO_DMA, |
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.irq_flags = IRQF_SHARED, |
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.chipset = ide_generic, |
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}; |
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/* |
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* Probe for a Gayle IDE interface (and optionally for an IDE doubler) |
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*/ |
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static int __init amiga_gayle_ide_probe(struct platform_device *pdev) |
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{ |
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struct resource *res; |
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struct gayle_ide_platform_data *pdata; |
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unsigned long base, ctrlport, irqport; |
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unsigned int i; |
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int error; |
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struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS]; |
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struct ide_port_info d = gayle_port_info; |
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struct ide_host *host; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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if (!res) |
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return -ENODEV; |
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if (!request_mem_region(res->start, resource_size(res), "IDE")) |
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return -EBUSY; |
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pdata = dev_get_platdata(&pdev->dev); |
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pr_info("ide: Gayle IDE controller (A%u style%s)\n", |
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pdata->explicit_ack ? 1200 : 4000, |
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ide_doubler ? ", IDE doubler" : ""); |
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base = (unsigned long)ZTWO_VADDR(pdata->base); |
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ctrlport = 0; |
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irqport = (unsigned long)ZTWO_VADDR(pdata->irqport); |
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if (pdata->explicit_ack) |
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d.port_ops = &gayle_a1200_port_ops; |
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else |
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d.port_ops = &gayle_a4000_port_ops; |
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for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++, base += GAYLE_NEXT_PORT) { |
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if (GAYLE_HAS_CONTROL_REG) |
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ctrlport = base + GAYLE_CONTROL; |
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gayle_setup_ports(&hw[i], base, ctrlport, irqport); |
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hws[i] = &hw[i]; |
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} |
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error = ide_host_add(&d, hws, i, &host); |
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if (error) |
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goto out; |
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platform_set_drvdata(pdev, host); |
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return 0; |
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out: |
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release_mem_region(res->start, resource_size(res)); |
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return error; |
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} |
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static int __exit amiga_gayle_ide_remove(struct platform_device *pdev) |
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{ |
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struct ide_host *host = platform_get_drvdata(pdev); |
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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ide_host_remove(host); |
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release_mem_region(res->start, resource_size(res)); |
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return 0; |
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} |
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static struct platform_driver amiga_gayle_ide_driver = { |
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.remove = __exit_p(amiga_gayle_ide_remove), |
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.driver = { |
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.name = "amiga-gayle-ide", |
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}, |
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}; |
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module_platform_driver_probe(amiga_gayle_ide_driver, amiga_gayle_ide_probe); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:amiga-gayle-ide");
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