Initial revision

1 files changed, 469 insertions, 0 deletions

diff --git a/board/mpl/common/isa.c b/board/mpl/common/isa.c
new file mode 100644
index 0000000..40731fc
--- /dev/null
+++ b/board/mpl/common/isa.c
@@ -0,0 +1,469 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ *
+ * TODO: clean-up
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <devices.h>
+#include "isa.h"
+#include "piix4_pci.h"
+#include "kbd.h"
+#include "video.h"
+
+extern int drv_isa_kbd_init (void);
+
+#undef	ISA_DEBUG
+
+#ifdef	ISA_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+#ifndef	TRUE
+#define TRUE            1
+#endif
+#ifndef FALSE
+#define FALSE           0
+#endif
+
+
+
+/* fdc (logical device 0) */
+const SIO_LOGDEV_TABLE sio_fdc[] = {
+	{0x60, 3},			/* set IO to FDPort (3F0) */
+	{0x61, 0xF0},		/* set IO to FDPort (3F0) */
+	{0x70, 06},			/* set IRQ 6 for FDPort */
+	{0x74, 02},			/* set DMA 2 for FDPort */
+	{0xF0, 0x05},		/* set to PS2 type */
+	{0xF1, 0x00},	  /* default value */
+	{0x30, 1},			/* and activate the device */
+	{0xFF, 0}				/* end of device table */
+};
+/* paralell port (logical device 3) */
+const SIO_LOGDEV_TABLE sio_pport[] = {
+	{0x60, 3},			/* set IO to PPort (378) */
+	{0x61, 0x78},		/* set IO to PPort (378) */
+	{0x70, 07},			/* set IRQ 7 for PPort */
+	{0xF1, 00},			/* set PPort to normal */
+	{0x30, 1},			/* and activate the device */
+	{0xFF, 0}				/* end of device table */
+};
+/* paralell port (logical device 3) Floppy assigned to lpt */
+const SIO_LOGDEV_TABLE sio_pport_fdc[] = {
+	{0x60, 3},			/* set IO to PPort (378) */
+	{0x61, 0x78},		/* set IO to PPort (378) */
+	{0x70, 07},			/* set IRQ 7 for PPort */
+	{0xF1, 02},			/* set PPort to Floppy */
+	{0x30, 1},			/* and activate the device */
+	{0xFF, 0}				/* end of device table */
+};
+/* uart 1 (logical device 4) */
+const SIO_LOGDEV_TABLE sio_com1[] = {
+	{0x60, 3},			/* set IO to COM1 (3F8) */
+	{0x61, 0xF8},		/* set IO to COM1 (3F8) */
+	{0x70, 04},			/* set IRQ 4 for COM1 */
+	{0x30, 1},			/* and activate the device */
+	{0xFF, 0}				/* end of device table */
+};
+/* uart 2 (logical device 5) */
+const SIO_LOGDEV_TABLE sio_com2[] = {
+	{0x60, 2},			/* set IO to COM2 (2F8) */
+	{0x61, 0xF8},		/* set IO to COM2 (2F8) */
+	{0x70, 03},			/* set IRQ 3 for COM2 */
+	{0x30, 1},			/* and activate the device */
+	{0xFF, 0}				/* end of device table */
+};
+
+/* keyboard controller (logical device 7) */
+const SIO_LOGDEV_TABLE sio_keyboard[] = {
+	{0x70, 1},			/* set IRQ 1 for keyboard */
+	{0x72, 12},			/* set IRQ 12 for mouse */
+	{0xF0, 0},			/* disable Port92 (this is a PowerPC!!) */
+	{0x30, 1},			/* and activate the device */
+	{0xFF, 0}				/* end of device table */
+};
+
+
+/*******************************************************************************
+* Config SuperIO FDC37C672
+********************************************************************************/
+unsigned char open_cfg_super_IO(int address)
+{
+	out8(CFG_ISA_IO_BASE_ADDRESS | address,0x55); /* open config */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address,0x20); /* set address to DEV ID */
+	if(in8(CFG_ISA_IO_BASE_ADDRESS | address | 0x1)==0x40) /* ok Device ID is correct */
+		return TRUE;
+	else
+		return FALSE;
+}
+
+void close_cfg_super_IO(int address)
+{
+	out8(CFG_ISA_IO_BASE_ADDRESS | address,0xAA); /* close config */
+}
+
+
+unsigned char read_cfg_super_IO(int address, unsigned char function, unsigned char regaddr)
+{
+	/* assuming config reg is open */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address,0x7); /* points to the function reg */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address | 1,function); /* set the function no */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address,regaddr); /* sets the address in the function */
+	return in8(CFG_ISA_IO_BASE_ADDRESS | address | 1);
+}
+
+void write_cfg_super_IO(int address, unsigned char function, unsigned char regaddr, unsigned char data)
+{
+	/* assuming config reg is open */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address,0x7); /* points to the function reg */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address | 1,function); /* set the function no */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address,regaddr); /* sets the address in the function */
+	out8(CFG_ISA_IO_BASE_ADDRESS | address | 1,data); /* writes the data */
+}
+
+void isa_write_table(SIO_LOGDEV_TABLE *ldt,unsigned char ldev)
+{
+	while (ldt->index != 0xFF) {
+		write_cfg_super_IO(SIO_CFG_PORT, ldev, ldt->index, ldt->val);
+		ldt++;
+	} /* endwhile */
+}
+
+void isa_sio_loadtable(void)
+{
+	unsigned char *s = getenv("floppy");
+	/* setup Floppy device 0*/
+	isa_write_table((SIO_LOGDEV_TABLE *)&sio_fdc,0);
+	/* setup parallel port device 3 */
+	if(s && !strncmp(s, "lpt", 3)) {
+		printf("SIO:   Floppy assigned to LPT\n");
+		/* floppy is assigned to the LPT */
+		isa_write_table((SIO_LOGDEV_TABLE *)&sio_pport_fdc,3);
+	}
+	else {
+		/*printf("Floppy assigned to internal port\n");*/
+		isa_write_table((SIO_LOGDEV_TABLE *)&sio_pport,3);
+	}
+	/* setup Com1 port device 4 */
+	isa_write_table((SIO_LOGDEV_TABLE *)&sio_com1,4);
+	/* setup Com2 port device 5 */
+	isa_write_table((SIO_LOGDEV_TABLE *)&sio_com2,5);
+	/* setup keyboards device 7 */
+	isa_write_table((SIO_LOGDEV_TABLE *)&sio_keyboard,7);
+}
+
+
+void isa_sio_setup(void)
+{
+	if(open_cfg_super_IO(SIO_CFG_PORT)==TRUE)
+	{
+		isa_sio_loadtable();
+		close_cfg_super_IO(0x3F0);
+	}
+}
+
+
+
+/******************************************************************************
+ * IRQ Controller
+ * we use the Vector mode
+ */
+
+struct	isa_irq_action {
+	 interrupt_handler_t *handler;
+	 void *arg;
+	 int count;
+};
+
+static struct isa_irq_action isa_irqs[16];
+
+
+/*
+ * This contains the irq mask for both 8259A irq controllers,
+ */
+static unsigned int cached_irq_mask = 0xffff;
+
+#define cached_imr1	(unsigned char)cached_irq_mask
+#define cached_imr2	(unsigned char)(cached_irq_mask>>8)
+#define IMR_1		CFG_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT1_OCW1
+#define IMR_2		CFG_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT2_OCW1
+#define ICW1_1	CFG_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT1_ICW1
+#define ICW1_2	CFG_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT2_ICW1
+#define ICW2_1	CFG_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT1_ICW2
+#define ICW2_2	CFG_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT2_ICW2
+#define ICW3_1	ICW2_1
+#define ICW3_2	ICW2_2
+#define ICW4_1	ICW2_1
+#define ICW4_2	ICW2_2
+#define ISR_1		ICW1_1
+#define ISR_2		ICW1_2
+
+
+void disable_8259A_irq(unsigned int irq)
+{
+	unsigned int mask = 1 << irq;
+
+	cached_irq_mask |= mask;
+	if (irq & 8)
+		out8(IMR_2,cached_imr2);
+	else
+		out8(IMR_1,cached_imr1);
+}
+
+void enable_8259A_irq(unsigned int irq)
+{
+	unsigned int mask = ~(1 << irq);
+
+	cached_irq_mask &= mask;
+	if (irq & 8)
+		out8(IMR_2,cached_imr2);
+	else
+		out8(IMR_1,cached_imr1);
+}
+/*
+int i8259A_irq_pending(unsigned int irq)
+{
+	unsigned int mask = 1<<irq;
+	int ret;
+
+	if (irq < 8)
+		ret = inb(0x20) & mask;
+	else
+		ret = inb(0xA0) & (mask >> 8);
+	spin_unlock_irqrestore(&i8259A_lock, flags);
+
+	return ret;
+}
+*/
+
+/*
+ * This function assumes to be called rarely. Switching between
+ * 8259A registers is slow.
+ */
+int i8259A_irq_real(unsigned int irq)
+{
+	int value;
+	int irqmask = 1<<irq;
+
+	if (irq < 8) {
+		out8(ISR_1,0x0B);		/* ISR register */
+		value = in8(ISR_1) & irqmask;
+		out8(ISR_1,0x0A);		/* back to the IRR register */
+		return value;
+	}
+	out8(ISR_2,0x0B);		/* ISR register */
+	value = in8(ISR_2) & (irqmask >> 8);
+	out8(ISR_2,0x0A);		/* back to the IRR register */
+	return value;
+}
+
+/*
+ * Careful! The 8259A is a fragile beast, it pretty
+ * much _has_ to be done exactly like this (mask it
+ * first, _then_ send the EOI, and the order of EOI
+ * to the two 8259s is important!
+ */
+void mask_and_ack_8259A(unsigned int irq)
+{
+	unsigned int irqmask = 1 << irq;
+	unsigned int temp_irqmask = cached_irq_mask;
+	/*
+	 * Lightweight spurious IRQ detection. We do not want
+	 * to overdo spurious IRQ handling - it's usually a sign
+	 * of hardware problems, so we only do the checks we can
+	 * do without slowing down good hardware unnecesserily.
+	 *
+	 * Note that IRQ7 and IRQ15 (the two spurious IRQs
+	 * usually resulting from the 8259A-1|2 PICs) occur
+	 * even if the IRQ is masked in the 8259A. Thus we
+	 * can check spurious 8259A IRQs without doing the
+	 * quite slow i8259A_irq_real() call for every IRQ.
+	 * This does not cover 100% of spurious interrupts,
+	 * but should be enough to warn the user that there
+	 * is something bad going on ...
+	 */
+	if (temp_irqmask & irqmask)
+		goto spurious_8259A_irq;
+	temp_irqmask |= irqmask;
+
+handle_real_irq:
+	if (irq & 8) {
+		in8(IMR_2);		/* DUMMY - (do we need this?) */
+		out8(IMR_2,(unsigned char)(temp_irqmask>>8));
+		out8(ISR_2,0x60+(irq&7));/* 'Specific EOI' to slave */
+		out8(ISR_1,0x62);	/* 'Specific EOI' to master-IRQ2 */
+		out8(IMR_2,cached_imr2); /* turn it on again */
+	} else {
+		in8(IMR_1);		/* DUMMY - (do we need this?) */
+		out8(IMR_1,(unsigned char)temp_irqmask);
+		out8(ISR_1,0x60+irq);	/* 'Specific EOI' to master */
+		out8(IMR_1,cached_imr1); /* turn it on again */
+	}
+
+	return;
+
+spurious_8259A_irq:
+	/*
+	 * this is the slow path - should happen rarely.
+	 */
+	if (i8259A_irq_real(irq))
+		/*
+		 * oops, the IRQ _is_ in service according to the
+		 * 8259A - not spurious, go handle it.
+		 */
+		goto handle_real_irq;
+
+	{
+		static int spurious_irq_mask;
+		/*
+		 * At this point we can be sure the IRQ is spurious,
+		 * lets ACK and report it. [once per IRQ]
+		 */
+		if (!(spurious_irq_mask & irqmask)) {
+			PRINTF("spurious 8259A interrupt: IRQ%d.\n", irq);
+			spurious_irq_mask |= irqmask;
+		}
+		/* irq_err_count++; */
+		/*
+		 * Theoretically we do not have to handle this IRQ,
+		 * but in Linux this does not cause problems and is
+		 * simpler for us.
+		 */
+		goto handle_real_irq;
+	}
+}
+
+void init_8259A(void)
+{
+	out8(IMR_1,0xff);	/* mask all of 8259A-1 */
+	out8(IMR_2,0xff);	/* mask all of 8259A-2 */
+
+	out8(ICW1_1,0x11);	/* ICW1: select 8259A-1 init */
+	out8(ICW2_1,0x20 + 0);	/* ICW2: 8259A-1 IR0-7 mapped to 0x20-0x27 */
+	out8(ICW3_1,0x04);	/* 8259A-1 (the master) has a slave on IR2 */
+	out8(ICW4_1,0x01);	/* master expects normal EOI */
+	out8(ICW1_2,0x11);	/* ICW2: select 8259A-2 init */
+	out8(ICW2_2,0x20 + 8);	/* ICW2: 8259A-2 IR0-7 mapped to 0x28-0x2f */
+	out8(ICW3_2,0x02);	/* 8259A-2 is a slave on master's IR2 */
+	out8(ICW4_2,0x01);	/* (slave's support for AEOI in flat mode
+				    is to be investigated) */
+	udelay(10000);		/* wait for 8259A to initialize */
+	out8(IMR_1,cached_imr1);	/* restore master IRQ mask */
+	udelay(10000);		/* wait for 8259A to initialize */
+	out8(IMR_2,cached_imr2);	/* restore slave IRQ mask */
+}
+
+
+#define PCI_INT_ACK_ADDR 0xEED00000
+
+int handle_isa_int(void)
+{
+	unsigned long irqack;
+	unsigned char isr1,isr2,irq;
+	/* first we acknokledge the int via the PCI bus */
+	irqack=in32(PCI_INT_ACK_ADDR);
+	/* now we get the ISRs */
+	isr2=in8(ISR_2);
+	isr1=in8(ISR_1);
+	irq=(unsigned char)irqack;
+	if((irq==7)&&((isr1&0x80)==0)) {
+		PRINTF("IRQ7 detected but not in ISR\n");
+	}
+	else {
+		/* we should handle cascaded interrupts here also */
+		/* printf("ISA Irq %d\n",irq); */
+		isa_irqs[irq].count++;
+  	if (isa_irqs[irq].handler != NULL)
+  		(*isa_irqs[irq].handler)(isa_irqs[irq].arg);      /* call isr */
+  	else
+  	{
+     	PRINTF ("bogus interrupt vector 0x%x\n", irq);
+  	}
+	}
+	/* issue EOI instruction to clear the IRQ */
+	mask_and_ack_8259A(irq);
+	return 0;
+}
+
+
+
+/******************************************************************
+ * Install and free an ISA interrupt handler.
+ */
+
+void isa_irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
+{
+  if (isa_irqs[vec].handler != NULL) {
+   printf ("ISA Interrupt vector %d: handler 0x%x replacing 0x%x\n",
+           vec, (uint)handler, (uint)isa_irqs[vec].handler);
+  }
+  isa_irqs[vec].handler = handler;
+  isa_irqs[vec].arg     = arg;
+  enable_8259A_irq(vec);
+ 	PRINTF ("Install ISA IRQ %d ==> %p, @ %p mask=%04x\n", vec, handler, &isa_irqs[vec].handler,cached_irq_mask);
+
+}
+
+void isa_irq_free_handler(int vec)
+{
+	disable_8259A_irq(vec);
+  isa_irqs[vec].handler = NULL;
+  isa_irqs[vec].arg     = NULL;
+ 	printf ("Free ISA IRQ %d mask=%04x\n", vec, cached_irq_mask);
+
+}
+
+/****************************************************************************/
+void isa_init_irq_contr(void)
+{
+	int i;
+	/* disable all Interrupts */
+	/* first write icws controller 1 */
+	for(i=0;i<16;i++)
+	{
+		isa_irqs[i].handler=NULL;
+		isa_irqs[i].arg=NULL;
+		isa_irqs[i].count=0;
+	}
+	init_8259A();
+	out8(IMR_2,0xFF);
+}
+
+
+/******************************************************************
+ * Init the ISA bus and devices.
+ */
+
+
+int isa_init(void)
+{
+	isa_sio_setup();
+	drv_isa_kbd_init();
+	return 0;
+}
+
+
+