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/*
* Driver for MagicBox 2.0 onboard CompactFlash adapter.
*
* Written by Wojtek Kaniewski <wojtekka@toxygen.net>
* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
*
* GNU General Public License.
*/
#include <linux/version.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#define UIC0_PR 0xc4
#define UIC0_TR 0xc5
#define MAGICBOX_CF_IRQ 25
static u8 magicbox_ide_inb(unsigned long port)
{
return (u8) (readw((void __iomem *) port) >> 8) & 0xff;
}
static void magicbox_ide_outb(u8 value, unsigned long port)
{
writew(value << 8, (void __iomem *) port);
}
static void magicbox_ide_outbsync(ide_drive_t *drive, u8 value,
unsigned long port)
{
writew(value << 8, (void __iomem *) port);
}
static inline void magicbox_ide_insw(unsigned long port, void *addr, u32 count)
{
u16 *ptr;
for (ptr = addr; count--; ptr++)
*ptr = readw((void __iomem *) port);
}
static inline void magicbox_ide_insl(unsigned long port, void *addr, u32 count)
{
u32 *ptr;
for (ptr = addr; count--; ptr++)
*ptr = readl((void __iomem *) port);
}
static inline void magicbox_ide_outsw(unsigned long port, void *addr,
u32 count)
{
u16 *ptr;
for (ptr = addr; count--; ptr++)
writew(*ptr, (void __iomem *) port);
}
static inline void magicbox_ide_outsl(unsigned long port, void *addr,
u32 count)
{
u32 *ptr;
for (ptr = addr; count--; ptr++)
writel(*ptr, (void __iomem *) port);
}
static void magicbox_ide_tf_load(ide_drive_t *drive, ide_task_t *task)
{
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
struct ide_taskfile *tf = &task->tf;
u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
if (task->tf_flags & IDE_TFLAG_FLAGGED)
HIHI = 0xFF;
ide_set_irq(drive, 1);
if (task->tf_flags & IDE_TFLAG_OUT_DATA)
writel((tf->hob_data << 8) | tf->data,
(void __iomem *) io_ports->data_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
magicbox_ide_outb(tf->hob_feature, io_ports->feature_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
magicbox_ide_outb(tf->hob_nsect, io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
magicbox_ide_outb(tf->hob_lbal, io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
magicbox_ide_outb(tf->hob_lbam, io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
magicbox_ide_outb(tf->hob_lbah, io_ports->lbah_addr);
if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
magicbox_ide_outb(tf->feature, io_ports->feature_addr);
if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
magicbox_ide_outb(tf->nsect, io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
magicbox_ide_outb(tf->lbal, io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
magicbox_ide_outb(tf->lbam, io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
magicbox_ide_outb(tf->lbah, io_ports->lbah_addr);
if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
magicbox_ide_outb((tf->device & HIHI) | drive->select.all,
io_ports->device_addr);
}
static void magicbox_ide_tf_read(ide_drive_t *drive, ide_task_t *task)
{
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
struct ide_taskfile *tf = &task->tf;
if (task->tf_flags & IDE_TFLAG_IN_DATA) {
u16 data = (u16) readl((void __iomem *) io_ports->data_addr);
tf->data = data & 0xff;
tf->hob_data = (data >> 8) & 0xff;
}
/* be sure we're looking at the low order bits */
magicbox_ide_outb(drive->ctl & ~0x80, io_ports->ctl_addr);
if (task->tf_flags & IDE_TFLAG_IN_NSECT)
tf->nsect = magicbox_ide_inb(io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_IN_LBAL)
tf->lbal = magicbox_ide_inb(io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_IN_LBAM)
tf->lbam = magicbox_ide_inb(io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_IN_LBAH)
tf->lbah = magicbox_ide_inb(io_ports->lbah_addr);
if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
tf->device = magicbox_ide_inb(io_ports->device_addr);
if (task->tf_flags & IDE_TFLAG_LBA48) {
magicbox_ide_outb(drive->ctl | 0x80, io_ports->ctl_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
tf->hob_feature = magicbox_ide_inb(io_ports->feature_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
tf->hob_nsect = magicbox_ide_inb(io_ports->nsect_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
tf->hob_lbal = magicbox_ide_inb(io_ports->lbal_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
tf->hob_lbam = magicbox_ide_inb(io_ports->lbam_addr);
if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
tf->hob_lbah = magicbox_ide_inb(io_ports->lbah_addr);
}
}
static void magicbox_ide_input_data(ide_drive_t *drive, struct request *rq,
void *buf, unsigned int len)
{
unsigned long port = drive->hwif->io_ports.data_addr;
len++;
if (drive->io_32bit) {
magicbox_ide_insl(port, buf, len / 4);
if ((len & 3) >= 2)
magicbox_ide_insw(port, (u8 *)buf + (len & ~3), 1);
} else
magicbox_ide_insw(port, buf, len / 2);
}
static void magicbox_ide_output_data(ide_drive_t *drive, struct request *rq,
void *buf, unsigned int len)
{
unsigned long port = drive->hwif->io_ports.data_addr;
len++;
if (drive->io_32bit) {
magicbox_ide_outsl(port, buf, len / 4);
if ((len & 3) >= 2)
magicbox_ide_outsw(port, (u8 *)buf + (len & ~3), 1);
} else
magicbox_ide_outsw(port, buf, len / 2);
}
static void __init magicbox_ide_setup_hw(hw_regs_t *hw, u16 __iomem *base,
u16 __iomem *ctrl, int irq)
{
unsigned long port = (unsigned long) base;
int i;
memset(hw, 0, sizeof(*hw));
for (i = 0; i <= 7; i++)
hw->io_ports_array[i] = port + i * 2;
/*
* the IDE control register is at ATA address 6,
* with CS1 active instead of CS0
*/
hw->io_ports.ctl_addr = (unsigned long)ctrl + (6 * 2);
hw->irq = irq;
hw->chipset = ide_generic;
hw->ack_intr = NULL;
}
static int __init magibox_ide_probe(void)
{
hw_regs_t hw;
ide_hwif_t *hwif;
u16 __iomem *base;
u16 __iomem *ctrl;
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
int err;
/* Remap physical address space */
base = ioremap_nocache(0xff100000, 4096);
if (base == NULL) {
err = -EBUSY;
goto err_out;
}
ctrl = ioremap_nocache(0xff200000, 4096);
if (ctrl == NULL) {
err = -EBUSY;
goto err_unmap_base;
}
magicbox_ide_setup_hw(&hw, base, ctrl, MAGICBOX_CF_IRQ);
hwif = ide_find_port();
if (!hwif) {
err = -ENODEV;
goto err_unmap_ctrl;
}
ide_init_port_data(hwif, hwif->index);
ide_init_port_hw(hwif, &hw);
hwif->host_flags = IDE_HFLAG_MMIO;
hwif->tf_load = magicbox_ide_tf_load;
hwif->tf_read = magicbox_ide_tf_read;
hwif->input_data = magicbox_ide_input_data;
hwif->output_data = magicbox_ide_output_data;
hwif->drives[0].unmask = 1;
hwif->OUTB = magicbox_ide_outb;
hwif->OUTBSYNC = magicbox_ide_outbsync;
hwif->INB = magicbox_ide_inb;
printk(KERN_INFO "ide%d: Magicbox CF interface\n", hwif->index);
idx[0] = hwif->index;
ide_device_add(idx, NULL);
return 0;
err_unmap_ctrl:
iounmap(ctrl);
err_unmap_base:
iounmap(base);
err_out:
return err;
}
static int __init magicbox_ide_init(void)
{
/* Turn on PerWE instead of PCIsomething */
mtdcr(DCRN_CPC0_PCI_BASE,
mfdcr(DCRN_CPC0_PCI_BASE) | (0x80000000L >> 27));
/* PerCS1 (CF's CS0): base 0xff100000, 16-bit, rw */
mtdcr(DCRN_EBC_BASE, 1);
mtdcr(DCRN_EBC_BASE + 1, 0xff11a000);
mtdcr(DCRN_EBC_BASE, 0x11);
mtdcr(DCRN_EBC_BASE + 1, 0x080bd800);
/* PerCS2 (CF's CS1): base 0xff200000, 16-bit, rw */
mtdcr(DCRN_EBC_BASE, 2);
mtdcr(DCRN_EBC_BASE + 1, 0xff21a000);
mtdcr(DCRN_EBC_BASE, 0x12);
mtdcr(DCRN_EBC_BASE + 1, 0x080bd800);
/* Set interrupt to low-to-high-edge-triggered */
mtdcr(UIC0_TR, mfdcr(UIC0_TR) & ~(0x80000000L >> MAGICBOX_CF_IRQ));
mtdcr(UIC0_PR, mfdcr(UIC0_PR) | (0x80000000L >> MAGICBOX_CF_IRQ));
return magibox_ide_probe();
}
module_init(magicbox_ide_init);
MODULE_LICENSE("GPL");
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