/* * H8/300 generic IDE interface */ #include <linux/init.h> #include <linux/ide.h> #include <asm/io.h> #include <asm/irq.h> #define DRV_NAME "ide-h8300" #define bswap(d) \ ({ \ u16 r; \ __asm__("mov.b %w1,r1h\n\t" \ "mov.b %x1,r1l\n\t" \ "mov.w r1,%0" \ :"=r"(r) \ :"r"(d) \ :"er1"); \ (r); \ }) static void mm_outsw(unsigned long addr, void *buf, u32 len) { unsigned short *bp = (unsigned short *)buf; for (; len > 0; len--, bp++) *(volatile u16 *)addr = bswap(*bp); } static void mm_insw(unsigned long addr, void *buf, u32 len) { unsigned short *bp = (unsigned short *)buf; for (; len > 0; len--, bp++) *bp = bswap(*(volatile u16 *)addr); } static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, unsigned int len) { mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); } static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, unsigned int len) { mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); } static const struct ide_tp_ops h8300_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 = h8300_input_data, .output_data = h8300_output_data, }; #define H8300_IDE_GAP (2) static inline void hw_setup(struct ide_hw *hw) { int i; memset(hw, 0, sizeof(*hw)); for (i = 0; i <= 7; i++) hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i; hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT; hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ; } static const struct ide_port_info h8300_port_info = { .tp_ops = &h8300_tp_ops, .host_flags = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA, .chipset = ide_generic, }; static int __init h8300_ide_init(void) { struct ide_hw hw, *hws[] = { &hw }; printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n"); if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300")) goto out_busy; if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) { release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8); goto out_busy; } hw_setup(&hw); return ide_host_add(&h8300_port_info, hws, 1, NULL); out_busy: printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n"); return -EBUSY; } module_init(h8300_ide_init); MODULE_LICENSE("GPL");