[MIPS] JMR3927 cleanup
* Kill dead codes
* Rearrange irq chip handlers
* Minimize defconfig
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/jmr3927/rbhma3100/irq.c b/arch/mips/jmr3927/rbhma3100/irq.c
index 7d2c203..1187b44 100644
--- a/arch/mips/jmr3927/rbhma3100/irq.c
+++ b/arch/mips/jmr3927/rbhma3100/irq.c
@@ -30,53 +30,21 @@
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
-
-#include <linux/errno.h>
-#include <linux/irq.h>
-#include <linux/kernel_stat.h>
-#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/bitops.h>
-#include <asm/irq_regs.h>
#include <asm/io.h>
#include <asm/mipsregs.h>
#include <asm/system.h>
-#include <asm/ptrace.h>
#include <asm/processor.h>
-#include <asm/jmr3927/irq.h>
-#include <asm/debug.h>
#include <asm/jmr3927/jmr3927.h>
#if JMR3927_IRQ_END > NR_IRQS
#error JMR3927_IRQ_END > NR_IRQS
#endif
-struct tb_irq_space* tb_irq_spaces;
-
-static int jmr3927_irq_base = -1;
-
-#ifdef CONFIG_PCI
-static int jmr3927_gen_iack(void)
-{
- /* generate ACK cycle */
-#ifdef __BIG_ENDIAN
- return (tx3927_pcicptr->iiadp >> 24) & 0xff;
-#else
- return tx3927_pcicptr->iiadp & 0xff;
-#endif
-}
-#endif
-
#define irc_dlevel 0
#define irc_elevel 1
@@ -87,89 +55,24 @@
6, 6, 6 /* TMR */
};
-static void jmr3927_irq_disable(unsigned int irq_nr);
-static void jmr3927_irq_enable(unsigned int irq_nr);
-
-static void jmr3927_irq_ack(unsigned int irq)
-{
- if (irq == JMR3927_IRQ_IRC_TMR0)
- jmr3927_tmrptr->tisr = 0; /* ack interrupt */
-
- jmr3927_irq_disable(irq);
-}
-
-static void jmr3927_irq_end(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- jmr3927_irq_enable(irq);
-}
-
-static void jmr3927_irq_disable(unsigned int irq_nr)
-{
- struct tb_irq_space* sp;
-
- for (sp = tb_irq_spaces; sp; sp = sp->next) {
- if (sp->start_irqno <= irq_nr &&
- irq_nr < sp->start_irqno + sp->nr_irqs) {
- if (sp->mask_func)
- sp->mask_func(irq_nr - sp->start_irqno,
- sp->space_id);
- break;
- }
- }
-}
-
-static void jmr3927_irq_enable(unsigned int irq_nr)
-{
- struct tb_irq_space* sp;
-
- for (sp = tb_irq_spaces; sp; sp = sp->next) {
- if (sp->start_irqno <= irq_nr &&
- irq_nr < sp->start_irqno + sp->nr_irqs) {
- if (sp->unmask_func)
- sp->unmask_func(irq_nr - sp->start_irqno,
- sp->space_id);
- break;
- }
- }
-}
-
/*
* CP0_STATUS is a thread's resource (saved/restored on context switch).
- * So disable_irq/enable_irq MUST handle IOC/ISAC/IRC registers.
+ * So disable_irq/enable_irq MUST handle IOC/IRC registers.
*/
-static void mask_irq_isac(int irq_nr, int space_id)
+static void mask_irq_ioc(unsigned int irq)
{
/* 0: mask */
- unsigned char imask =
- jmr3927_isac_reg_in(JMR3927_ISAC_INTM_ADDR);
- unsigned int bit = 1 << irq_nr;
- jmr3927_isac_reg_out(imask & ~bit, JMR3927_ISAC_INTM_ADDR);
- /* flush write buffer */
- (void)jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR);
-}
-static void unmask_irq_isac(int irq_nr, int space_id)
-{
- /* 0: mask */
- unsigned char imask = jmr3927_isac_reg_in(JMR3927_ISAC_INTM_ADDR);
- unsigned int bit = 1 << irq_nr;
- jmr3927_isac_reg_out(imask | bit, JMR3927_ISAC_INTM_ADDR);
- /* flush write buffer */
- (void)jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR);
-}
-
-static void mask_irq_ioc(int irq_nr, int space_id)
-{
- /* 0: mask */
+ unsigned int irq_nr = irq - JMR3927_IRQ_IOC;
unsigned char imask = jmr3927_ioc_reg_in(JMR3927_IOC_INTM_ADDR);
unsigned int bit = 1 << irq_nr;
jmr3927_ioc_reg_out(imask & ~bit, JMR3927_IOC_INTM_ADDR);
/* flush write buffer */
(void)jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR);
}
-static void unmask_irq_ioc(int irq_nr, int space_id)
+static void unmask_irq_ioc(unsigned int irq)
{
/* 0: mask */
+ unsigned int irq_nr = irq - JMR3927_IRQ_IOC;
unsigned char imask = jmr3927_ioc_reg_in(JMR3927_IOC_INTM_ADDR);
unsigned int bit = 1 << irq_nr;
jmr3927_ioc_reg_out(imask | bit, JMR3927_IOC_INTM_ADDR);
@@ -177,8 +80,9 @@
(void)jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR);
}
-static void mask_irq_irc(int irq_nr, int space_id)
+static void mask_irq_irc(unsigned int irq)
{
+ unsigned int irq_nr = irq - JMR3927_IRQ_IRC;
volatile unsigned long *ilrp = &tx3927_ircptr->ilr[irq_nr / 2];
if (irq_nr & 1)
*ilrp = (*ilrp & 0x00ff) | (irc_dlevel << 8);
@@ -191,8 +95,9 @@
(void)tx3927_ircptr->ssr;
}
-static void unmask_irq_irc(int irq_nr, int space_id)
+static void unmask_irq_irc(unsigned int irq)
{
+ unsigned int irq_nr = irq - JMR3927_IRQ_IRC;
volatile unsigned long *ilrp = &tx3927_ircptr->ilr[irq_nr / 2];
if (irq_nr & 1)
*ilrp = (*ilrp & 0x00ff) | (irc_level[irq_nr] << 8);
@@ -203,98 +108,14 @@
tx3927_ircptr->imr = irc_elevel;
}
-struct tb_irq_space jmr3927_isac_irqspace = {
- .next = NULL,
- .start_irqno = JMR3927_IRQ_ISAC,
- nr_irqs : JMR3927_NR_IRQ_ISAC,
- .mask_func = mask_irq_isac,
- .unmask_func = unmask_irq_isac,
- .name = "ISAC",
- .space_id = 0,
- can_share : 0
-};
-struct tb_irq_space jmr3927_ioc_irqspace = {
- .next = NULL,
- .start_irqno = JMR3927_IRQ_IOC,
- nr_irqs : JMR3927_NR_IRQ_IOC,
- .mask_func = mask_irq_ioc,
- .unmask_func = unmask_irq_ioc,
- .name = "IOC",
- .space_id = 0,
- can_share : 1
-};
-
-struct tb_irq_space jmr3927_irc_irqspace = {
- .next = NULL,
- .start_irqno = JMR3927_IRQ_IRC,
- .nr_irqs = JMR3927_NR_IRQ_IRC,
- .mask_func = mask_irq_irc,
- .unmask_func = unmask_irq_irc,
- .name = "on-chip",
- .space_id = 0,
- .can_share = 0
-};
-
-
-#ifdef CONFIG_TX_BRANCH_LIKELY_BUG_WORKAROUND
-static int tx_branch_likely_bug_count = 0;
-static int have_tx_branch_likely_bug = 0;
-
-static void tx_branch_likely_bug_fixup(void)
-{
- struct pt_regs *regs = get_irq_regs();
-
- /* TX39/49-BUG: Under this condition, the insn in delay slot
- of the branch likely insn is executed (not nullified) even
- the branch condition is false. */
- if (!have_tx_branch_likely_bug)
- return;
- if ((regs->cp0_epc & 0xfff) == 0xffc &&
- KSEGX(regs->cp0_epc) != KSEG0 &&
- KSEGX(regs->cp0_epc) != KSEG1) {
- unsigned int insn = *(unsigned int*)(regs->cp0_epc - 4);
- /* beql,bnel,blezl,bgtzl */
- /* bltzl,bgezl,blezall,bgezall */
- /* bczfl, bcztl */
- if ((insn & 0xf0000000) == 0x50000000 ||
- (insn & 0xfc0e0000) == 0x04020000 ||
- (insn & 0xf3fe0000) == 0x41020000) {
- regs->cp0_epc -= 4;
- tx_branch_likely_bug_count++;
- printk(KERN_INFO
- "fix branch-likery bug in %s (insn %08x)\n",
- current->comm, insn);
- }
- }
-}
-#endif
-
-static void jmr3927_spurious(void)
-{
- struct pt_regs * regs = get_irq_regs();
-
-#ifdef CONFIG_TX_BRANCH_LIKELY_BUG_WORKAROUND
- tx_branch_likely_bug_fixup();
-#endif
- printk(KERN_WARNING "spurious interrupt (cause 0x%lx, pc 0x%lx, ra 0x%lx).\n",
- regs->cp0_cause, regs->cp0_epc, regs->regs[31]);
-}
-
asmlinkage void plat_irq_dispatch(void)
{
- struct pt_regs * regs = get_irq_regs();
+ unsigned long cp0_cause = read_c0_cause();
int irq;
-#ifdef CONFIG_TX_BRANCH_LIKELY_BUG_WORKAROUND
- tx_branch_likely_bug_fixup();
-#endif
- if ((regs->cp0_cause & CAUSEF_IP7) == 0) {
-#if 0
- jmr3927_spurious();
-#endif
+ if ((cp0_cause & CAUSEF_IP7) == 0)
return;
- }
- irq = (regs->cp0_cause >> CAUSEB_IP2) & 0x0f;
+ irq = (cp0_cause >> CAUSEB_IP2) & 0x0f;
do_IRQ(irq + JMR3927_IRQ_IRC);
}
@@ -317,35 +138,6 @@
jmr3927_ioc_interrupt, 0, CPU_MASK_NONE, "IOC", NULL, NULL,
};
-static irqreturn_t jmr3927_isac_interrupt(int irq, void *dev_id)
-{
- unsigned char istat = jmr3927_isac_reg_in(JMR3927_ISAC_INTS2_ADDR);
- int i;
-
- for (i = 0; i < JMR3927_NR_IRQ_ISAC; i++) {
- if (istat & (1 << i)) {
- irq = JMR3927_IRQ_ISAC + i;
- do_IRQ(irq);
- }
- }
- return IRQ_HANDLED;
-}
-
-static struct irqaction isac_action = {
- jmr3927_isac_interrupt, 0, CPU_MASK_NONE, "ISAC", NULL, NULL,
-};
-
-
-static irqreturn_t jmr3927_isaerr_interrupt(int irq, void *dev_id)
-{
- printk(KERN_WARNING "ISA error interrupt (irq 0x%x).\n", irq);
-
- return IRQ_HANDLED;
-}
-static struct irqaction isaerr_action = {
- jmr3927_isaerr_interrupt, 0, CPU_MASK_NONE, "ISA error", NULL, NULL,
-};
-
static irqreturn_t jmr3927_pcierr_interrupt(int irq, void *dev_id)
{
printk(KERN_WARNING "PCI error interrupt (irq 0x%x).\n", irq);
@@ -358,54 +150,19 @@
jmr3927_pcierr_interrupt, 0, CPU_MASK_NONE, "PCI error", NULL, NULL,
};
-int jmr3927_ether1_irq = 0;
-
-void jmr3927_irq_init(u32 irq_base);
+static void __init jmr3927_irq_init(void);
void __init arch_init_irq(void)
{
- /* look for io board's presence */
- int have_isac = jmr3927_have_isac();
-
/* Now, interrupt control disabled, */
/* all IRC interrupts are masked, */
/* all IRC interrupt mode are Low Active. */
- if (have_isac) {
-
- /* ETHER1 (NE2000 compatible 10M-Ether) parameter setup */
- /* temporary enable interrupt control */
- tx3927_ircptr->cer = 1;
- /* ETHER1 Int. Is High-Active. */
- if (tx3927_ircptr->ssr & (1 << 0))
- jmr3927_ether1_irq = JMR3927_IRQ_IRC_INT0;
-#if 0 /* INT3 may be asserted by ether0 (even after reboot...) */
- else if (tx3927_ircptr->ssr & (1 << 3))
- jmr3927_ether1_irq = JMR3927_IRQ_IRC_INT3;
-#endif
- /* disable interrupt control */
- tx3927_ircptr->cer = 0;
-
- /* Ether1: High Active */
- if (jmr3927_ether1_irq) {
- int ether1_irc = jmr3927_ether1_irq - JMR3927_IRQ_IRC;
- tx3927_ircptr->cr[ether1_irc / 8] |=
- TX3927_IRCR_HIGH << ((ether1_irc % 8) * 2);
- }
- }
-
/* mask all IOC interrupts */
jmr3927_ioc_reg_out(0, JMR3927_IOC_INTM_ADDR);
/* setup IOC interrupt mode (SOFT:High Active, Others:Low Active) */
jmr3927_ioc_reg_out(JMR3927_IOC_INTF_SOFT, JMR3927_IOC_INTP_ADDR);
- if (have_isac) {
- /* mask all ISAC interrupts */
- jmr3927_isac_reg_out(0, JMR3927_ISAC_INTM_ADDR);
- /* setup ISAC interrupt mode (ISAIRQ3,ISAIRQ5:Low Active ???) */
- jmr3927_isac_reg_out(JMR3927_ISAC_INTF_IRQ3|JMR3927_ISAC_INTF_IRQ5, JMR3927_ISAC_INTP_ADDR);
- }
-
/* clear PCI Soft interrupts */
jmr3927_ioc_reg_out(0, JMR3927_IOC_INTS1_ADDR);
/* clear PCI Reset interrupts */
@@ -415,21 +172,11 @@
tx3927_ircptr->cer = TX3927_IRCER_ICE;
tx3927_ircptr->imr = irc_elevel;
- jmr3927_irq_init(NR_ISA_IRQS);
-
- /* setup irq space */
- add_tb_irq_space(&jmr3927_isac_irqspace);
- add_tb_irq_space(&jmr3927_ioc_irqspace);
- add_tb_irq_space(&jmr3927_irc_irqspace);
+ jmr3927_irq_init();
/* setup IOC interrupt 1 (PCI, MODEM) */
setup_irq(JMR3927_IRQ_IOCINT, &ioc_action);
- if (have_isac) {
- setup_irq(JMR3927_IRQ_ISACINT, &isac_action);
- setup_irq(JMR3927_IRQ_ISAC_ISAER, &isaerr_action);
- }
-
#ifdef CONFIG_PCI
setup_irq(JMR3927_IRQ_IRC_PCI, &pcierr_action);
#endif
@@ -438,21 +185,28 @@
set_c0_status(ST0_IM); /* IE bit is still 0. */
}
-static struct irq_chip jmr3927_irq_controller = {
- .name = "jmr3927_irq",
- .ack = jmr3927_irq_ack,
- .mask = jmr3927_irq_disable,
- .mask_ack = jmr3927_irq_ack,
- .unmask = jmr3927_irq_enable,
- .end = jmr3927_irq_end,
+static struct irq_chip jmr3927_irq_ioc = {
+ .name = "jmr3927_ioc",
+ .ack = mask_irq_ioc,
+ .mask = mask_irq_ioc,
+ .mask_ack = mask_irq_ioc,
+ .unmask = unmask_irq_ioc,
};
-void jmr3927_irq_init(u32 irq_base)
+static struct irq_chip jmr3927_irq_irc = {
+ .name = "jmr3927_irc",
+ .ack = mask_irq_irc,
+ .mask = mask_irq_irc,
+ .mask_ack = mask_irq_irc,
+ .unmask = unmask_irq_irc,
+};
+
+static void __init jmr3927_irq_init(void)
{
u32 i;
- for (i= irq_base; i< irq_base + JMR3927_NR_IRQ_IRC + JMR3927_NR_IRQ_IOC; i++)
- set_irq_chip(i, &jmr3927_irq_controller);
-
- jmr3927_irq_base = irq_base;
+ for (i = JMR3927_IRQ_IRC; i < JMR3927_IRQ_IRC + JMR3927_NR_IRQ_IRC; i++)
+ set_irq_chip_and_handler(i, &jmr3927_irq_irc, handle_level_irq);
+ for (i = JMR3927_IRQ_IOC; i < JMR3927_IRQ_IOC + JMR3927_NR_IRQ_IOC; i++)
+ set_irq_chip_and_handler(i, &jmr3927_irq_ioc, handle_level_irq);
}