1/* 2 * H8/300 generic IDE interface 3 */ 4 5#include <linux/init.h> 6#include <linux/ide.h> 7 8#include <asm/io.h> 9#include <asm/irq.h> 10 11#define DRV_NAME "ide-h8300" 12 13#define bswap(d) \ 14({ \ 15 u16 r; \ 16 __asm__("mov.b %w1,r1h\n\t" \ 17 "mov.b %x1,r1l\n\t" \ 18 "mov.w r1,%0" \ 19 :"=r"(r) \ 20 :"r"(d) \ 21 :"er1"); \ 22 (r); \ 23}) 24 25static void mm_outsw(unsigned long addr, void *buf, u32 len) 26{ 27 unsigned short *bp = (unsigned short *)buf; 28 for (; len > 0; len--, bp++) 29 *(volatile u16 *)addr = bswap(*bp); 30} 31 32static void mm_insw(unsigned long addr, void *buf, u32 len) 33{ 34 unsigned short *bp = (unsigned short *)buf; 35 for (; len > 0; len--, bp++) 36 *bp = bswap(*(volatile u16 *)addr); 37} 38 39static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd, 40 void *buf, unsigned int len) 41{ 42 mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); 43} 44 45static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd, 46 void *buf, unsigned int len) 47{ 48 mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); 49} 50 51static const struct ide_tp_ops h8300_tp_ops = { 52 .exec_command = ide_exec_command, 53 .read_status = ide_read_status, 54 .read_altstatus = ide_read_altstatus, 55 .write_devctl = ide_write_devctl, 56 57 .dev_select = ide_dev_select, 58 .tf_load = ide_tf_load, 59 .tf_read = ide_tf_read, 60 61 .input_data = h8300_input_data, 62 .output_data = h8300_output_data, 63}; 64 65#define H8300_IDE_GAP (2) 66 67static inline void hw_setup(struct ide_hw *hw) 68{ 69 int i; 70 71 memset(hw, 0, sizeof(*hw)); 72 for (i = 0; i <= 7; i++) 73 hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i; 74 hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT; 75 hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ; 76} 77 78static const struct ide_port_info h8300_port_info = { 79 .tp_ops = &h8300_tp_ops, 80 .host_flags = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA, 81 .chipset = ide_generic, 82}; 83 84static int __init h8300_ide_init(void) 85{ 86 struct ide_hw hw, *hws[] = { &hw }; 87 88 printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n"); 89 90 if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300")) 91 goto out_busy; 92 if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) { 93 release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8); 94 goto out_busy; 95 } 96 97 hw_setup(&hw); 98 99 return ide_host_add(&h8300_port_info, hws, 1, NULL); 100 101out_busy: 102 printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n"); 103 104 return -EBUSY; 105} 106 107module_init(h8300_ide_init); 108 109MODULE_LICENSE("GPL"); 110