diff options
Diffstat (limited to 'drivers/ide/q40ide.c')
| -rw-r--r-- | drivers/ide/q40ide.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/ide/q40ide.c b/drivers/ide/q40ide.c new file mode 100644 index 000000000..ecd0a6924 --- /dev/null +++ b/drivers/ide/q40ide.c @@ -0,0 +1,168 @@ +/* + * Q40 I/O port IDE Driver + * + * (c) Richard Zidlicky + * + * 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/module.h> + +#include <asm/ide.h> + + /* + * Bases of the IDE interfaces + */ + +#define Q40IDE_NUM_HWIFS 2 + +#define PCIDE_BASE1 0x1f0 +#define PCIDE_BASE2 0x170 +#define PCIDE_BASE3 0x1e8 +#define PCIDE_BASE4 0x168 +#define PCIDE_BASE5 0x1e0 +#define PCIDE_BASE6 0x160 + +static const unsigned long pcide_bases[Q40IDE_NUM_HWIFS] = { + PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4 , PCIDE_BASE5, + PCIDE_BASE6 */ +}; + +static int q40ide_default_irq(unsigned long base) +{ + switch (base) { + case 0x1f0: return 14; + case 0x170: return 15; + case 0x1e8: return 11; + default: + return 0; + } +} + + +/* + * Addresses are pretranslated for Q40 ISA access. + */ +static void q40_ide_setup_ports(struct ide_hw *hw, unsigned long base, int irq) +{ + memset(hw, 0, sizeof(*hw)); + /* BIG FAT WARNING: + assumption: only DATA port is ever used in 16 bit mode */ + hw->io_ports.data_addr = Q40_ISA_IO_W(base); + hw->io_ports.error_addr = Q40_ISA_IO_B(base + 1); + hw->io_ports.nsect_addr = Q40_ISA_IO_B(base + 2); + hw->io_ports.lbal_addr = Q40_ISA_IO_B(base + 3); + hw->io_ports.lbam_addr = Q40_ISA_IO_B(base + 4); + hw->io_ports.lbah_addr = Q40_ISA_IO_B(base + 5); + hw->io_ports.device_addr = Q40_ISA_IO_B(base + 6); + hw->io_ports.status_addr = Q40_ISA_IO_B(base + 7); + hw->io_ports.ctl_addr = Q40_ISA_IO_B(base + 0x206); + + hw->irq = irq; +} + +static void q40ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, + void *buf, unsigned int len) +{ + unsigned long data_addr = drive->hwif->io_ports.data_addr; + + if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) { + __ide_mm_insw(data_addr, buf, (len + 1) / 2); + return; + } + + raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2); +} + +static void q40ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, + void *buf, unsigned int len) +{ + unsigned long data_addr = drive->hwif->io_ports.data_addr; + + if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) { + __ide_mm_outsw(data_addr, buf, (len + 1) / 2); + return; + } + + raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2); +} + +/* Q40 has a byte-swapped IDE interface */ +static const struct ide_tp_ops q40ide_tp_ops = { + .exec_command = ide_exec_command, + .read_status = ide_read_status, + .read_altstatus = ide_read_altstatus, + .write_devctl = ide_write_devctl, + + .dev_select = ide_dev_select, + .tf_load = ide_tf_load, + .tf_read = ide_tf_read, + + .input_data = q40ide_input_data, + .output_data = q40ide_output_data, +}; + +static const struct ide_port_info q40ide_port_info = { + .tp_ops = &q40ide_tp_ops, + .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, + .irq_flags = IRQF_SHARED, + .chipset = ide_generic, +}; + +/* + * the static array is needed to have the name reported in /proc/ioports, + * hwif->name unfortunately isn't available yet + */ +static const char *q40_ide_names[Q40IDE_NUM_HWIFS]={ + "ide0", "ide1" +}; + +/* + * Probe for Q40 IDE interfaces + */ + +static int __init q40ide_init(void) +{ + int i; + struct ide_hw hw[Q40IDE_NUM_HWIFS], *hws[] = { NULL, NULL }; + + if (!MACH_IS_Q40) + return -ENODEV; + + printk(KERN_INFO "ide: Q40 IDE controller\n"); + + for (i = 0; i < Q40IDE_NUM_HWIFS; i++) { + const char *name = q40_ide_names[i]; + + if (!request_region(pcide_bases[i], 8, name)) { + printk("could not reserve ports %lx-%lx for %s\n", + pcide_bases[i],pcide_bases[i]+8,name); + continue; + } + if (!request_region(pcide_bases[i]+0x206, 1, name)) { + printk("could not reserve port %lx for %s\n", + pcide_bases[i]+0x206,name); + release_region(pcide_bases[i], 8); + continue; + } + q40_ide_setup_ports(&hw[i], pcide_bases[i], + q40ide_default_irq(pcide_bases[i])); + + hws[i] = &hw[i]; + } + + return ide_host_add(&q40ide_port_info, hws, Q40IDE_NUM_HWIFS, NULL); +} + +module_init(q40ide_init); + +MODULE_LICENSE("GPL"); |