--- /dev/null
+/*
+ * linux/arch/mips/tx4938/toshiba_rbtx4938/irq.c
+ *
+ * Toshiba RBTX4938 specific interrupt handlers
+ * Copyright (C) 2000-2001 Toshiba Corporation
+ *
+ * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
+ */
+
+/*
+IRQ Device
+
+16 TX4938-CP0/00 Software 0
+17 TX4938-CP0/01 Software 1
+18 TX4938-CP0/02 Cascade TX4938-CP0
+19 TX4938-CP0/03 Multiplexed -- do not use
+20 TX4938-CP0/04 Multiplexed -- do not use
+21 TX4938-CP0/05 Multiplexed -- do not use
+22 TX4938-CP0/06 Multiplexed -- do not use
+23 TX4938-CP0/07 CPU TIMER
+
+24 TX4938-PIC/00
+25 TX4938-PIC/01
+26 TX4938-PIC/02 Cascade RBTX4938-IOC
+27 TX4938-PIC/03 RBTX4938 RTL-8019AS Ethernet
+28 TX4938-PIC/04
+29 TX4938-PIC/05 TX4938 ETH1
+30 TX4938-PIC/06 TX4938 ETH0
+31 TX4938-PIC/07
+32 TX4938-PIC/08 TX4938 SIO 0
+33 TX4938-PIC/09 TX4938 SIO 1
+34 TX4938-PIC/10 TX4938 DMA0
+35 TX4938-PIC/11 TX4938 DMA1
+36 TX4938-PIC/12 TX4938 DMA2
+37 TX4938-PIC/13 TX4938 DMA3
+38 TX4938-PIC/14
+39 TX4938-PIC/15
+40 TX4938-PIC/16 TX4938 PCIC
+41 TX4938-PIC/17 TX4938 TMR0
+42 TX4938-PIC/18 TX4938 TMR1
+43 TX4938-PIC/19 TX4938 TMR2
+44 TX4938-PIC/20
+45 TX4938-PIC/21
+46 TX4938-PIC/22 TX4938 PCIERR
+47 TX4938-PIC/23
+48 TX4938-PIC/24
+49 TX4938-PIC/25
+50 TX4938-PIC/26
+51 TX4938-PIC/27
+52 TX4938-PIC/28
+53 TX4938-PIC/29
+54 TX4938-PIC/30
+55 TX4938-PIC/31 TX4938 SPI
+
+56 RBTX4938-IOC/00 PCI-D
+57 RBTX4938-IOC/01 PCI-C
+58 RBTX4938-IOC/02 PCI-B
+59 RBTX4938-IOC/03 PCI-A
+60 RBTX4938-IOC/04 RTC
+61 RBTX4938-IOC/05 ATA
+62 RBTX4938-IOC/06 MODEM
+63 RBTX4938-IOC/07 SWINT
+*/
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/timex.h>
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+#include <asm/reboot.h>
+#include <asm/time.h>
+#include <linux/bootmem.h>
+#include <asm/tx4938/rbtx4938.h>
+
+static unsigned int toshiba_rbtx4938_irq_ioc_startup(unsigned int irq);
+static void toshiba_rbtx4938_irq_ioc_shutdown(unsigned int irq);
+static void toshiba_rbtx4938_irq_ioc_enable(unsigned int irq);
+static void toshiba_rbtx4938_irq_ioc_disable(unsigned int irq);
+static void toshiba_rbtx4938_irq_ioc_mask_and_ack(unsigned int irq);
+static void toshiba_rbtx4938_irq_ioc_end(unsigned int irq);
+
+DEFINE_SPINLOCK(toshiba_rbtx4938_ioc_lock);
+
+#define TOSHIBA_RBTX4938_IOC_NAME "RBTX4938-IOC"
+static struct hw_interrupt_type toshiba_rbtx4938_irq_ioc_type = {
+ .typename = TOSHIBA_RBTX4938_IOC_NAME,
+ .startup = toshiba_rbtx4938_irq_ioc_startup,
+ .shutdown = toshiba_rbtx4938_irq_ioc_shutdown,
+ .enable = toshiba_rbtx4938_irq_ioc_enable,
+ .disable = toshiba_rbtx4938_irq_ioc_disable,
+ .ack = toshiba_rbtx4938_irq_ioc_mask_and_ack,
+ .end = toshiba_rbtx4938_irq_ioc_end,
+ .set_affinity = NULL
+};
+
+#define TOSHIBA_RBTX4938_IOC_INTR_ENAB 0xb7f02000
+#define TOSHIBA_RBTX4938_IOC_INTR_STAT 0xb7f0200a
+
+int
+toshiba_rbtx4938_irq_nested(int sw_irq)
+{
+ u8 level3;
+
+ level3 = reg_rd08(TOSHIBA_RBTX4938_IOC_INTR_STAT) & 0xff;
+ if (level3) {
+ /* must use fls so onboard ATA has priority */
+ sw_irq = TOSHIBA_RBTX4938_IRQ_IOC_BEG + fls(level3) - 1;
+ }
+
+ wbflush();
+ return sw_irq;
+}
+
+static struct irqaction toshiba_rbtx4938_irq_ioc_action = {
+ .handler = no_action,
+ .flags = 0,
+ .mask = CPU_MASK_NONE,
+ .name = TOSHIBA_RBTX4938_IOC_NAME,
+};
+
+/**********************************************************************************/
+/* Functions for ioc */
+/**********************************************************************************/
+static void __init
+toshiba_rbtx4938_irq_ioc_init(void)
+{
+ int i;
+
+ for (i = TOSHIBA_RBTX4938_IRQ_IOC_BEG;
+ i <= TOSHIBA_RBTX4938_IRQ_IOC_END; i++) {
+ irq_desc[i].status = IRQ_DISABLED;
+ irq_desc[i].action = 0;
+ irq_desc[i].depth = 3;
+ irq_desc[i].handler = &toshiba_rbtx4938_irq_ioc_type;
+ }
+
+ setup_irq(RBTX4938_IRQ_IOCINT,
+ &toshiba_rbtx4938_irq_ioc_action);
+}
+
+static unsigned int
+toshiba_rbtx4938_irq_ioc_startup(unsigned int irq)
+{
+ toshiba_rbtx4938_irq_ioc_enable(irq);
+
+ return 0;
+}
+
+static void
+toshiba_rbtx4938_irq_ioc_shutdown(unsigned int irq)
+{
+ toshiba_rbtx4938_irq_ioc_disable(irq);
+}
+
+static void
+toshiba_rbtx4938_irq_ioc_enable(unsigned int irq)
+{
+ unsigned long flags;
+ volatile unsigned char v;
+
+ spin_lock_irqsave(&toshiba_rbtx4938_ioc_lock, flags);
+
+ v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
+ v |= (1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
+ TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
+ mmiowb();
+ TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
+
+ spin_unlock_irqrestore(&toshiba_rbtx4938_ioc_lock, flags);
+}
+
+static void
+toshiba_rbtx4938_irq_ioc_disable(unsigned int irq)
+{
+ unsigned long flags;
+ volatile unsigned char v;
+
+ spin_lock_irqsave(&toshiba_rbtx4938_ioc_lock, flags);
+
+ v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
+ v &= ~(1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
+ TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
+ mmiowb();
+ TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
+
+ spin_unlock_irqrestore(&toshiba_rbtx4938_ioc_lock, flags);
+}
+
+static void
+toshiba_rbtx4938_irq_ioc_mask_and_ack(unsigned int irq)
+{
+ toshiba_rbtx4938_irq_ioc_disable(irq);
+}
+
+static void
+toshiba_rbtx4938_irq_ioc_end(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
+ toshiba_rbtx4938_irq_ioc_enable(irq);
+ }
+}
+
+extern void __init txx9_spi_irqinit(int irc_irq);
+
+void __init arch_init_irq(void)
+{
+ extern void tx4938_irq_init(void);
+
+ /* Now, interrupt control disabled, */
+ /* all IRC interrupts are masked, */
+ /* all IRC interrupt mode are Low Active. */
+
+ /* mask all IOC interrupts */
+ *rbtx4938_imask_ptr = 0;
+
+ /* clear SoftInt interrupts */
+ *rbtx4938_softint_ptr = 0;
+ tx4938_irq_init();
+ toshiba_rbtx4938_irq_ioc_init();
+ /* Onboard 10M Ether: High Active */
+ TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM0), 0x00000040);
+
+ if (tx4938_ccfgptr->pcfg & TX4938_PCFG_SPI_SEL) {
+ txx9_spi_irqinit(RBTX4938_IRQ_IRC_SPI);
+ }
+
+ wbflush();
+}
git://git.onelab.eu / linux-2.6.git / blobdiff