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author | Scott Wood <scottwood@freescale.com> | 2014-04-07 23:49:35 (GMT) |
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committer | Scott Wood <scottwood@freescale.com> | 2014-04-07 23:49:35 (GMT) |
commit | 62b8c978ee6b8d135d9e7953221de58000dba986 (patch) | |
tree | 683b04b2e627f6710c22c151b23c8cc9a165315e /drivers/ide/ide-h8300.c | |
parent | 78fd82238d0e5716578c326404184a27ba67fd6e (diff) | |
download | linux-fsl-qoriq-62b8c978ee6b8d135d9e7953221de58000dba986.tar.xz |
Rewind v3.13-rc3+ (78fd82238d0e5716) to v3.12
Diffstat (limited to 'drivers/ide/ide-h8300.c')
-rw-r--r-- | drivers/ide/ide-h8300.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/ide/ide-h8300.c b/drivers/ide/ide-h8300.c new file mode 100644 index 0000000..520f42c --- /dev/null +++ b/drivers/ide/ide-h8300.c @@ -0,0 +1,109 @@ +/* + * 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"); |