[PATCH] m32r: bootloader support for OPSPUT platform

This patch supports "m32r-g00ff" bootloader for an OPSPUT platform.

Applying this patch, it is possible to do ATA-boot from an IDE drive or
HTTP-boot from network by m32r-g00ff.

* arch/m32r/boot/compressed/m32r_sio.c: Fix hangup on OPSPUT at boot.

* arch/m32r/kernel/io_opsput.c: IDE support for OPSPUT.
* arch/m32r/kernel/setup_opsput.c: ditto.
* include/asm-m32r/ide.h: ditto.

Signed-off-by: Kazuhiro Inaoka <[e-mail]>
Signed-off-by: Hirokazu Takata <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/m32r/boot/compressed/m32r_sio.c

···
  * arch/m32r/boot/compressed/m32r_sio.c
  *
  * 2003-02-12:	Takeo Takahashi
+ * 2006-11-30:	OPSPUT support by Kazuhiro Inaoka
  *
  */
 
···
 	return 0;
 }
 
-#if defined(CONFIG_PLAT_M32700UT_Alpha) || defined(CONFIG_PLAT_M32700UT)
+#if defined(CONFIG_PLAT_M32700UT_Alpha) || defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT)
 #include <asm/m32r.h>
 #include <asm/io.h>
 
···
 #define BOOT_SIO0TXB	(volatile unsigned short *)(0x02c00000 + 0x2000c)
 #else
 #undef PLD_BASE
+#if defined(CONFIG_PLAT_OPSPUT)
+#define PLD_BASE	0x1cc00000
+#else
 #define PLD_BASE	0xa4c00000
+#endif
 #define BOOT_SIO0STS	PLD_ESIO0STS
 #define BOOT_SIO0TXB	PLD_ESIO0TXB
 #endif

arch/m32r/kernel/io_opsput.c

···
 extern void pcc_iowrite_word(int, unsigned long, void *, size_t, size_t, int);
 #endif /* CONFIG_PCMCIA && CONFIG_M32R_CFC */
 
-#define PORT2ADDR(port)  _port2addr(port)
-#define PORT2ADDR_USB(port) _port2addr_usb(port)
+#define PORT2ADDR(port)		_port2addr(port)
+#define PORT2ADDR_USB(port)	_port2addr_usb(port)
 
 static inline void *_port2addr(unsigned long port)
 {
 	return (void *)(port | NONCACHE_OFFSET);
 }
+
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+static inline void *__port2addr_ata(unsigned long port)
+{
+	static int	dummy_reg;
+
+	switch (port) {
+	case 0x1f0:	return (void *)(0x0c002000 | NONCACHE_OFFSET);
+	case 0x1f1:	return (void *)(0x0c012800 | NONCACHE_OFFSET);
+	case 0x1f2:	return (void *)(0x0c012002 | NONCACHE_OFFSET);
+	case 0x1f3:	return (void *)(0x0c012802 | NONCACHE_OFFSET);
+	case 0x1f4:	return (void *)(0x0c012004 | NONCACHE_OFFSET);
+	case 0x1f5:	return (void *)(0x0c012804 | NONCACHE_OFFSET);
+	case 0x1f6:	return (void *)(0x0c012006 | NONCACHE_OFFSET);
+	case 0x1f7:	return (void *)(0x0c012806 | NONCACHE_OFFSET);
+	case 0x3f6:	return (void *)(0x0c01200e | NONCACHE_OFFSET);
+	default: 	return (void *)&dummy_reg;
+	}
+}
+#endif
 
 /*
  * OPSPUT-LAN is located in the extended bus space
···
 {
 	if (port >= LAN_IOSTART && port < LAN_IOEND)
 		return _ne_inb(PORT2ADDR_NE(port));
+
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		return *(volatile unsigned char *)__port2addr_ata(port);
+	}
+#endif
 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
 	else if (port >= M32R_PCC_IOSTART0 && port <= M32R_PCC_IOEND0) {
 		unsigned char b;
···
 {
 	if (port >= LAN_IOSTART && port < LAN_IOEND)
 		return _ne_inw(PORT2ADDR_NE(port));
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		return *(volatile unsigned short *)__port2addr_ata(port);
+	}
+#endif
 #if defined(CONFIG_USB)
 	else if(port >= 0x340 && port < 0x3a0)
 		return *(volatile unsigned short *)PORT2ADDR_USB(port);
···
 	if (port >= LAN_IOSTART && port < LAN_IOEND)
 		_ne_outb(b, PORT2ADDR_NE(port));
 	else
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		*(volatile unsigned char *)__port2addr_ata(port) = b;
+	} else
+#endif
 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
 	if (port >= M32R_PCC_IOSTART0 && port <= M32R_PCC_IOEND0) {
 		pcc_iowrite_byte(0, port, &b, sizeof(b), 1, 0);
···
 	if (port >= LAN_IOSTART && port < LAN_IOEND)
 		_ne_outw(w, PORT2ADDR_NE(port));
 	else
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		*(volatile unsigned short *)__port2addr_ata(port) = w;
+	} else
+#endif
 #if defined(CONFIG_USB)
 	if(port >= 0x340 && port < 0x3a0)
 		*(volatile unsigned short *)PORT2ADDR_USB(port) = w;
···
 {
 	if (port >= LAN_IOSTART && port < LAN_IOEND)
 		_ne_insb(PORT2ADDR_NE(port), addr, count);
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		unsigned char *buf = addr;
+		unsigned char *portp = __port2addr_ata(port);
+		while (count--)
+			*buf++ = *(volatile unsigned char *)portp;
+	}
+#endif
 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
 	else if (port >= M32R_PCC_IOSTART0 && port <= M32R_PCC_IOEND0) {
 		pcc_ioread_byte(0, port, (void *)addr, sizeof(unsigned char),
···
 		pcc_ioread_word(9, port, (void *)addr, sizeof(unsigned short),
 				count, 1);
 #endif
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	} else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		portp = __port2addr_ata(port);
+		while (count--)
+			*buf++ = *(volatile unsigned short *)portp;
+#endif
 	} else {
 		portp = PORT2ADDR(port);
 		while (count--)
···
 		portp = PORT2ADDR_NE(port);
 		while (count--)
 			_ne_outb(*buf++, portp);
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	} else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		portp = __port2addr_ata(port);
+		while (count--)
+			*(volatile unsigned char *)portp = *buf++;
+#endif
 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
 	} else if (port >= M32R_PCC_IOSTART0 && port <= M32R_PCC_IOEND0) {
 		pcc_iowrite_byte(0, port, (void *)addr, sizeof(unsigned char),
···
 		portp = PORT2ADDR_NE(port);
 		while (count--)
 			*(volatile unsigned short *)portp = *buf++;
+#if defined(CONFIG_IDE) && !defined(CONFIG_M32R_CFC)
+	} else if ((port >= 0x1f0 && port <=0x1f7) || port == 0x3f6) {
+		portp = __port2addr_ata(port);
+		while (count--)
+			*(volatile unsigned short *)portp = *buf++;
+#endif
 #if defined(CONFIG_PCMCIA) && defined(CONFIG_M32R_CFC)
 	} else if (port >= M32R_PCC_IOSTART0 && port <= M32R_PCC_IOEND0) {
 		pcc_iowrite_word(9, port, (void *)addr, sizeof(unsigned short),

arch/m32r/kernel/setup_opsput.c

···
 
 static struct hw_interrupt_type opsput_lanpld_irq_type =
 {
-	"OPSPUT-PLD-LAN-IRQ",
-	startup_opsput_lanpld_irq,
-	shutdown_opsput_lanpld_irq,
-	enable_opsput_lanpld_irq,
-	disable_opsput_lanpld_irq,
-	mask_and_ack_opsput_lanpld,
-	end_opsput_lanpld_irq
+	.typename = "OPSPUT-PLD-LAN-IRQ",
+	.startup = startup_opsput_lanpld_irq,
+	.shutdown = shutdown_opsput_lanpld_irq,
+	.enable = enable_opsput_lanpld_irq,
+	.disable = disable_opsput_lanpld_irq,
+	.ack = mask_and_ack_opsput_lanpld,
+	.end = end_opsput_lanpld_irq
 };
 
 /*
···
 	disable_opsput_pld_irq(PLD_IRQ_SIO0_SND);
 #endif  /* CONFIG_SERIAL_M32R_PLDSIO */
 
-#if defined(CONFIG_M32R_CFC)
 	/* INT#1: CFC IREQ on PLD */
 	irq_desc[PLD_IRQ_CFIREQ].status = IRQ_DISABLED;
 	irq_desc[PLD_IRQ_CFIREQ].chip = &opsput_pld_irq_type;
···
 	irq_desc[PLD_IRQ_CFC_EJECT].depth = 1;	/* disable nested irq */
 	pld_icu_data[irq2pldirq(PLD_IRQ_CFC_EJECT)].icucr = PLD_ICUCR_IEN|PLD_ICUCR_ISMOD02;	/* 'H' edge sense */
 	disable_opsput_pld_irq(PLD_IRQ_CFC_EJECT);
-#endif /* CONFIG_M32R_CFC */
-
 
 	/*
 	 * INT0# is used for LAN, DIO

include/asm-m32r/ide.h

···
 static __inline__ int ide_default_irq(unsigned long base)
 {
 	switch (base) {
-#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2)
+#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) \
+	|| defined(CONFIG_PLAT_OPSPUT)
 		case 0x1f0: return PLD_IRQ_CFIREQ;
 		default:
 			return 0;