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238 lines
5.6 KiB
238 lines
5.6 KiB
/* |
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* Amiga Buddha, Catweasel and X-Surf IDE Driver |
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* |
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* Copyright (C) 1997, 2001 by Geert Uytterhoeven and others |
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* |
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* This driver was written based on the specifications in README.buddha and |
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* the X-Surf info from Inside_XSurf.txt available at |
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* http://www.jschoenfeld.com |
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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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* TODO: |
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* - test it :-) |
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* - tune the timings using the speed-register |
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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/zorro.h> |
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#include <linux/ide.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <asm/amigahw.h> |
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#include <asm/amigaints.h> |
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/* |
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* The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2 |
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*/ |
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#define BUDDHA_NUM_HWIFS 2 |
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#define CATWEASEL_NUM_HWIFS 3 |
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#define XSURF_NUM_HWIFS 2 |
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#define MAX_NUM_HWIFS 3 |
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/* |
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* Bases of the IDE interfaces (relative to the board address) |
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*/ |
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#define BUDDHA_BASE1 0x800 |
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#define BUDDHA_BASE2 0xa00 |
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#define BUDDHA_BASE3 0xc00 |
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#define XSURF_BASE1 0xb000 /* 2.5" Interface */ |
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#define XSURF_BASE2 0xd000 /* 3.5" Interface */ |
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static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = { |
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BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3 |
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}; |
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static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = { |
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XSURF_BASE1, XSURF_BASE2 |
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}; |
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/* |
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* Offsets from one of the above bases |
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*/ |
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#define BUDDHA_CONTROL 0x11a |
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/* |
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* Other registers |
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*/ |
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#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */ |
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#define BUDDHA_IRQ2 0xf40 /* interrupt */ |
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#define BUDDHA_IRQ3 0xf80 |
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#define XSURF_IRQ1 0x7e |
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#define XSURF_IRQ2 0x7e |
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static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = { |
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BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3 |
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}; |
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static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = { |
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XSURF_IRQ1, XSURF_IRQ2 |
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}; |
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#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */ |
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/* |
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* Board information |
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*/ |
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typedef enum BuddhaType_Enum { |
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BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF |
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} BuddhaType; |
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static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" }; |
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/* |
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* Check and acknowledge the interrupt status |
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*/ |
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static int buddha_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 & 0x80)) |
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return 0; |
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return 1; |
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} |
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static void xsurf_clear_irq(ide_drive_t *drive) |
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{ |
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/* |
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* X-Surf needs 0 written to IRQ register to ensure ISA bit A11 stays at 0 |
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*/ |
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z_writeb(0, drive->hwif->io_ports.irq_addr); |
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} |
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static void __init buddha_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 buddha_port_ops = { |
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.test_irq = buddha_test_irq, |
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}; |
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static const struct ide_port_ops xsurf_port_ops = { |
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.clear_irq = xsurf_clear_irq, |
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.test_irq = buddha_test_irq, |
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}; |
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static const struct ide_port_info buddha_port_info = { |
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.port_ops = &buddha_port_ops, |
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.host_flags = IDE_HFLAG_MMIO | 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 Buddha or Catweasel IDE interface |
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*/ |
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static int __init buddha_init(void) |
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{ |
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struct zorro_dev *z = NULL; |
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u_long buddha_board = 0; |
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BuddhaType type; |
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int buddha_num_hwifs, i; |
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while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { |
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unsigned long board; |
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struct ide_hw hw[MAX_NUM_HWIFS], *hws[MAX_NUM_HWIFS]; |
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struct ide_port_info d = buddha_port_info; |
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if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) { |
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buddha_num_hwifs = BUDDHA_NUM_HWIFS; |
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type=BOARD_BUDDHA; |
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} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) { |
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buddha_num_hwifs = CATWEASEL_NUM_HWIFS; |
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type=BOARD_CATWEASEL; |
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} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) { |
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buddha_num_hwifs = XSURF_NUM_HWIFS; |
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type=BOARD_XSURF; |
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d.port_ops = &xsurf_port_ops; |
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} else |
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continue; |
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board = z->resource.start; |
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if(type != BOARD_XSURF) { |
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if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE")) |
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continue; |
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} else { |
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if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE")) |
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continue; |
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if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE")) |
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goto fail_base2; |
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if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) { |
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release_mem_region(board+XSURF_BASE2, 0x1000); |
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fail_base2: |
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release_mem_region(board+XSURF_BASE1, 0x1000); |
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continue; |
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} |
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} |
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buddha_board = (unsigned long)ZTWO_VADDR(board); |
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/* write to BUDDHA_IRQ_MR to enable the board IRQ */ |
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/* X-Surf doesn't have this. IRQs are always on */ |
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if (type != BOARD_XSURF) |
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z_writeb(0, buddha_board+BUDDHA_IRQ_MR); |
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printk(KERN_INFO "ide: %s IDE controller\n", |
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buddha_board_name[type]); |
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for (i = 0; i < buddha_num_hwifs; i++) { |
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unsigned long base, ctl, irq_port; |
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if (type != BOARD_XSURF) { |
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base = buddha_board + buddha_bases[i]; |
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ctl = base + BUDDHA_CONTROL; |
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irq_port = buddha_board + buddha_irqports[i]; |
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} else { |
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base = buddha_board + xsurf_bases[i]; |
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/* X-Surf has no CS1* (Control/AltStat) */ |
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ctl = 0; |
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irq_port = buddha_board + xsurf_irqports[i]; |
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} |
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buddha_setup_ports(&hw[i], base, ctl, irq_port); |
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hws[i] = &hw[i]; |
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} |
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ide_host_add(&d, hws, i, NULL); |
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} |
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return 0; |
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} |
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module_init(buddha_init); |
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MODULE_LICENSE("GPL");
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