[magicbox] fix the CF driver on 2.6.26.x, and create a package for it

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12364 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 217 insertions, 70 deletions

diff --git a/target/linux/magicbox/files/drivers/ide/ppc/magicbox_ide.c b/target/linux/magicbox/files/drivers/ide/ppc/magicbox_ide.c
index 2c1532093..0bc62f2de 100644
--- a/target/linux/magicbox/files/drivers/ide/ppc/magicbox_ide.c
+++ b/target/linux/magicbox/files/drivers/ide/ppc/magicbox_ide.c
@@ -1,5 +1,8 @@
-/* Driver for MagicBox 2.0 onboard CompactFlash adapter.
+/*
+ * 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.
  */
@@ -14,24 +17,27 @@
 #include <linux/delay.h>
 #include <linux/platform_device.h>
 
+#define UIC0_PR		0xc4
+#define UIC0_TR		0xc5
+#define MAGICBOX_CF_IRQ	25
 
-#define UIC0_PR 0xc4
-#define UIC0_TR 0xc5
-#define IRQ 25
-
-static int ide_offsets[IDE_NR_PORTS] = {0, 2, 4, 6, 8, 10, 12, 14, -1, -1};
+static u8 magicbox_ide_inb(unsigned long port)
+{
+	return (u8) (readw((void __iomem *) port) >> 8) & 0xff;
+}
 
-static u8 magicbox_ide_inb (unsigned long port)
+static void magicbox_ide_outb(u8 value, unsigned long port)
 {
-	return (u8) (readw((void __iomem *) port) >> 8) & 255;
+	writew(value << 8, (void __iomem *) port);
 }
 
-static u16 magicbox_ide_inw (unsigned long port)
+static void magicbox_ide_outbsync(ide_drive_t *drive, u8 value,
+				  unsigned long port)
 {
-	return (u16) readw((void __iomem *) port);
+	writew(value << 8, (void __iomem *) port);
 }
 
-static void magicbox_ide_insw (unsigned long port, void *addr, u32 count)
+static inline void magicbox_ide_insw(unsigned long port, void *addr, u32 count)
 {
 	u16 *ptr;
 
@@ -39,12 +45,7 @@ static void magicbox_ide_insw (unsigned long port, void *addr, u32 count)
 		*ptr = readw((void __iomem *) port);
 }
 
-static u32 magicbox_ide_inl (unsigned long port)
-{
-	return (u32) readl((void __iomem *) port);
-}
-
-static void magicbox_ide_insl (unsigned long port, void *addr, u32 count)
+static inline void magicbox_ide_insl(unsigned long port, void *addr, u32 count)
 {
 	u32 *ptr;
 
@@ -52,82 +53,229 @@ static void magicbox_ide_insl (unsigned long port, void *addr, u32 count)
 		*ptr = readl((void __iomem *) port);
 }
 
-static void magicbox_ide_outb (u8 value, unsigned long port)
+static inline void magicbox_ide_outsw(unsigned long port, void *addr,
+					u32 count)
 {
-	writew(value << 8, (void __iomem *) port);
+	u16 *ptr;
+
+	for (ptr = addr; count--; ptr++)
+		writew(*ptr, (void __iomem *) port);
 }
 
-static void magicbox_ide_outbsync (ide_drive_t *drive, u8 value, unsigned long port)
+static inline void magicbox_ide_outsl(unsigned long port, void *addr,
+					u32 count)
 {
-	writew(value << 8, (void __iomem *) port);
+	u32 *ptr;
+
+	for (ptr = addr; count--; ptr++)
+		writel(*ptr, (void __iomem *) port);
 }
 
-static void magicbox_ide_outw (u16 value, unsigned long port)
+static void magicbox_ide_tf_load(ide_drive_t *drive, ide_task_t *task)
 {
-	writew(value, (void __iomem *) port);
+	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_outsw (unsigned long port, void *addr, u32 count)
+static void magicbox_ide_tf_read(ide_drive_t *drive, ide_task_t *task)
 {
-	u16 *ptr;
+	struct ide_io_ports *io_ports = &drive->hwif->io_ports;
+	struct ide_taskfile *tf = &task->tf;
 
-	for (ptr = addr; count--; ptr++)
-		writew(*ptr, (void __iomem *) port);
+	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_outl (u32 value, unsigned long port)
+static void magicbox_ide_input_data(ide_drive_t *drive, struct request *rq,
+			   void *buf, unsigned int len)
 {
-	writel(value, (void __iomem *) port);
+	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_outsl (unsigned long port, void *addr, u32 count)
+static void magicbox_ide_output_data(ide_drive_t *drive,  struct request *rq,
+			    void *buf, unsigned int len)
 {
-	u32 *ptr;
+	unsigned long port = drive->hwif->io_ports.data_addr;
 
-	for (ptr = addr; count--; ptr++)
-		writel(*ptr, (void __iomem *) port);
+	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;
 
-static void __init ide_magicbox_register(unsigned long addr,
-					 unsigned long caddr, int irq)
+	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;
+	}
 
-  	memset(&hw, 0, sizeof(hw));
-	ide_setup_ports(&hw, addr, ide_offsets, caddr + 12, 0, NULL,irq);
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
-	if (ide_register_hw(&hw, &hwif) != -1)
-#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
-	if (ide_register_hw(&hw, 1, &hwif) != -1)
-#else
-	if (ide_register_hw(&hw, NULL, 1, &hwif) != -1)
-#endif
-	{
-		printk(KERN_NOTICE "magicbox-ide: Registered IDE-CF driver\n");
-		hwif->mmio = 2;
-		hwif->drives[0].unmask = 1;
-		hwif->OUTB = magicbox_ide_outb;
-		hwif->OUTBSYNC = magicbox_ide_outbsync;
-		hwif->OUTW = magicbox_ide_outw;
-		hwif->OUTSW = magicbox_ide_outsw;
-		hwif->OUTSL = magicbox_ide_outsl;
-		hwif->INB = magicbox_ide_inb;
-		hwif->INW = magicbox_ide_inw;
-		hwif->INSW = magicbox_ide_insw;
-		hwif->INSL = magicbox_ide_insl;
+	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;
 }
 
-void __init ide_magicbox_init(void)
+static int __init magicbox_ide_init(void)
 {
-	volatile u16 *addr;
-	volatile u16 *caddr;
-
 	/* Turn on PerWE instead of PCIsomething */
-	mtdcr(DCRN_CPC0_PCI_BASE, mfdcr(DCRN_CPC0_PCI_BASE) | (0x80000000L >> 27));
+	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);
@@ -141,14 +289,13 @@ void __init ide_magicbox_init(void)
 	mtdcr(DCRN_EBC_BASE, 0x12);
 	mtdcr(DCRN_EBC_BASE + 1, 0x080bd800);
 
-	/* Remap physical address space */
-	addr = ioremap_nocache(0xff100000, 4096);
-	caddr = ioremap_nocache(0xff200000, 4096);
-
 	/* Set interrupt to low-to-high-edge-triggered */
-	mtdcr(UIC0_TR, mfdcr(UIC0_TR) & ~(0x80000000L >> IRQ));
-	mtdcr(UIC0_PR, mfdcr(UIC0_PR) | (0x80000000L >> IRQ));
+	mtdcr(UIC0_TR, mfdcr(UIC0_TR) & ~(0x80000000L >> MAGICBOX_CF_IRQ));
+	mtdcr(UIC0_PR, mfdcr(UIC0_PR) | (0x80000000L >> MAGICBOX_CF_IRQ));
 
-	ide_magicbox_register((unsigned long)addr, (unsigned long)caddr, IRQ);
+	return magibox_ide_probe();
 }
 
+module_init(magicbox_ide_init);
+
+MODULE_LICENSE("GPL");