--- /dev/null
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * TODO: clean-up
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <stdio_dev.h>
+#include "isa.h"
+#include "piix4_pci.h"
+#include "kbd.h"
+#include "video.h"
+
+
+#undef ISA_DEBUG
+
+#ifdef ISA_DEBUG
+#define PRINTF(fmt,args...) printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+#if defined(CONFIG_PIP405)
+
+extern int drv_isa_kbd_init (void);
+
+/* 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(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address,0x55); /* open config */
+ out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address,0x20); /* set address to DEV ID */
+ if(in8(CONFIG_SYS_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(CONFIG_SYS_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(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address,0x7); /* points to the function reg */
+ out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address | 1,function); /* set the function no */
+ out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address,regaddr); /* sets the address in the function */
+ return in8(CONFIG_SYS_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(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address,0x7); /* points to the function reg */
+ out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address | 1,function); /* set the function no */
+ out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS | address,regaddr); /* sets the address in the function */
+ out8(CONFIG_SYS_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)
+{
+ 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);
+ }
+}
+#endif
+
+/******************************************************************************
+ * 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 = 0xfff9;
+
+#define cached_imr1 (unsigned char)cached_irq_mask
+#define cached_imr2 (unsigned char)(cached_irq_mask>>8)
+#define IMR_1 CONFIG_SYS_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT1_OCW1
+#define IMR_2 CONFIG_SYS_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT2_OCW1
+#define ICW1_1 CONFIG_SYS_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT1_ICW1
+#define ICW1_2 CONFIG_SYS_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT2_ICW1
+#define ICW2_1 CONFIG_SYS_ISA_IO_BASE_ADDRESS + PIIX4_ISA_INT1_ICW2
+#define ICW2_2 CONFIG_SYS_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 irq;
+ /* first we acknokledge the int via the PCI bus */
+ irqack=in32(PCI_INT_ACK_ADDR);
+ /* now we get the ISRs */
+ in8(ISR_2);
+ in8(ISR_1);
+ irq=(unsigned char)irqack;
+ irq-=32;
+/* 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(irq!=2) { /* just swallow the cascade irq 2 */
+ 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);
+}
+/*************************************************************************/
+
+void isa_show_irq(void)
+{
+ int vec;
+
+ printf ("\nISA Interrupt-Information:\n");
+ printf ("Nr Routine Arg Count\n");
+
+ for (vec=0; vec<16; vec++) {
+ if (isa_irqs[vec].handler != NULL) {
+ printf ("%02d %08lx %08lx %d\n",
+ vec,
+ (ulong)isa_irqs[vec].handler,
+ (ulong)isa_irqs[vec].arg,
+ isa_irqs[vec].count);
+ }
+ }
+}
+
+int isa_irq_get_count(int vec)
+{
+ return(isa_irqs[vec].count);
+}
+
+/******************************************************************
+ * Init the ISA bus and devices.
+ */
+
+#if defined(CONFIG_PIP405)
+
+int isa_init(void)
+{
+ isa_sio_setup();
+ isa_init_irq_contr();
+ drv_isa_kbd_init();
+ return 0;
+}
+#endif
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