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-rw-r--r--arch/arm/mach-rpc/Makefile3
-rw-r--r--arch/arm/mach-rpc/dma.c97
-rw-r--r--arch/arm/mach-rpc/ecard-loader.S40
-rw-r--r--arch/arm/mach-rpc/ecard.c32
-rw-r--r--arch/arm/mach-rpc/floppydma.S29
-rw-r--r--arch/arm/mach-rpc/include/mach/uncompress.h23
-rw-r--r--arch/arm/mach-rpc/io-acorn.S28
-rw-r--r--arch/arm/mach-rpc/irq.c136
-rw-r--r--arch/arm/mach-rpc/time.c38
9 files changed, 256 insertions, 170 deletions
diff --git a/arch/arm/mach-rpc/Makefile b/arch/arm/mach-rpc/Makefile
index 056ef5460290..90a645a18444 100644
--- a/arch/arm/mach-rpc/Makefile
+++ b/arch/arm/mach-rpc/Makefile
@@ -5,4 +5,5 @@
# Object file lists.
-obj-y := dma.o ecard.o fiq.o irq.o riscpc.o time.o
+obj-y :=dma.o ecard.o ecard-loader.o fiq.o floppydma.o io-acorn.o irq.o \
+ riscpc.o time.o
diff --git a/arch/arm/mach-rpc/dma.c b/arch/arm/mach-rpc/dma.c
index 488d5c3b37f4..50e0f97afd75 100644
--- a/arch/arm/mach-rpc/dma.c
+++ b/arch/arm/mach-rpc/dma.c
@@ -24,10 +24,11 @@
struct iomd_dma {
struct dma_struct dma;
- unsigned int state;
- unsigned long base; /* Controller base address */
+ void __iomem *base; /* Controller base address */
int irq; /* Controller IRQ */
- struct scatterlist cur_sg; /* Current controller buffer */
+ unsigned int state;
+ dma_addr_t cur_addr;
+ unsigned int cur_len;
dma_addr_t dma_addr;
unsigned int dma_len;
};
@@ -50,13 +51,13 @@ typedef enum {
#define CR (IOMD_IO0CR - IOMD_IO0CURA)
#define ST (IOMD_IO0ST - IOMD_IO0CURA)
-static void iomd_get_next_sg(struct scatterlist *sg, struct iomd_dma *idma)
+static void iomd_get_next_sg(struct iomd_dma *idma)
{
unsigned long end, offset, flags = 0;
if (idma->dma.sg) {
- sg->dma_address = idma->dma_addr;
- offset = sg->dma_address & ~PAGE_MASK;
+ idma->cur_addr = idma->dma_addr;
+ offset = idma->cur_addr & ~PAGE_MASK;
end = offset + idma->dma_len;
@@ -66,7 +67,7 @@ static void iomd_get_next_sg(struct scatterlist *sg, struct iomd_dma *idma)
if (offset + TRANSFER_SIZE >= end)
flags |= DMA_END_L;
- sg->length = end - TRANSFER_SIZE;
+ idma->cur_len = end - TRANSFER_SIZE;
idma->dma_len -= end - offset;
idma->dma_addr += end - offset;
@@ -84,52 +85,49 @@ static void iomd_get_next_sg(struct scatterlist *sg, struct iomd_dma *idma)
}
} else {
flags = DMA_END_S | DMA_END_L;
- sg->dma_address = 0;
- sg->length = 0;
+ idma->cur_addr = 0;
+ idma->cur_len = 0;
}
- sg->length |= flags;
+ idma->cur_len |= flags;
}
static irqreturn_t iomd_dma_handle(int irq, void *dev_id)
{
struct iomd_dma *idma = dev_id;
- unsigned long base = idma->base;
+ void __iomem *base = idma->base;
+ unsigned int state = idma->state;
+ unsigned int status, cur, end;
do {
- unsigned int status;
-
- status = iomd_readb(base + ST);
+ status = readb(base + ST);
if (!(status & DMA_ST_INT))
- return IRQ_HANDLED;
-
- if ((idma->state ^ status) & DMA_ST_AB)
- iomd_get_next_sg(&idma->cur_sg, idma);
-
- switch (status & (DMA_ST_OFL | DMA_ST_AB)) {
- case DMA_ST_OFL: /* OIA */
- case DMA_ST_AB: /* .IB */
- iomd_writel(idma->cur_sg.dma_address, base + CURA);
- iomd_writel(idma->cur_sg.length, base + ENDA);
- idma->state = DMA_ST_AB;
- break;
-
- case DMA_ST_OFL | DMA_ST_AB: /* OIB */
- case 0: /* .IA */
- iomd_writel(idma->cur_sg.dma_address, base + CURB);
- iomd_writel(idma->cur_sg.length, base + ENDB);
- idma->state = 0;
- break;
+ goto out;
+
+ if ((state ^ status) & DMA_ST_AB)
+ iomd_get_next_sg(idma);
+
+ // This efficiently implements state = OFL != AB ? AB : 0
+ state = ((status >> 2) ^ status) & DMA_ST_AB;
+ if (state) {
+ cur = CURA;
+ end = ENDA;
+ } else {
+ cur = CURB;
+ end = ENDB;
}
+ writel(idma->cur_addr, base + cur);
+ writel(idma->cur_len, base + end);
if (status & DMA_ST_OFL &&
- idma->cur_sg.length == (DMA_END_S|DMA_END_L))
+ idma->cur_len == (DMA_END_S|DMA_END_L))
break;
} while (1);
- idma->state = ~DMA_ST_AB;
- disable_irq(irq);
-
+ state = ~DMA_ST_AB;
+ disable_irq_nosync(irq);
+out:
+ idma->state = state;
return IRQ_HANDLED;
}
@@ -157,7 +155,7 @@ static struct device isa_dma_dev = {
static void iomd_enable_dma(unsigned int chan, dma_t *dma)
{
struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);
- unsigned long dma_base = idma->base;
+ void __iomem *base = idma->base;
unsigned int ctrl = TRANSFER_SIZE | DMA_CR_E;
if (idma->dma.invalid) {
@@ -177,27 +175,30 @@ static void iomd_enable_dma(unsigned int chan, dma_t *dma)
DMA_FROM_DEVICE : DMA_TO_DEVICE);
}
- iomd_writeb(DMA_CR_C, dma_base + CR);
+ idma->dma_addr = idma->dma.sg->dma_address;
+ idma->dma_len = idma->dma.sg->length;
+
+ writeb(DMA_CR_C, base + CR);
idma->state = DMA_ST_AB;
}
if (idma->dma.dma_mode == DMA_MODE_READ)
ctrl |= DMA_CR_D;
- iomd_writeb(ctrl, dma_base + CR);
+ writeb(ctrl, base + CR);
enable_irq(idma->irq);
}
static void iomd_disable_dma(unsigned int chan, dma_t *dma)
{
struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);
- unsigned long dma_base = idma->base;
+ void __iomem *base = idma->base;
unsigned long flags;
local_irq_save(flags);
if (idma->state != ~DMA_ST_AB)
disable_irq(idma->irq);
- iomd_writeb(0, dma_base + CR);
+ writeb(0, base + CR);
local_irq_restore(flags);
}
@@ -360,17 +361,17 @@ static int __init rpc_dma_init(void)
*/
iomd_writeb(DMA_EXT_IO3|DMA_EXT_IO2, IOMD_DMAEXT);
- iomd_dma[DMA_0].base = IOMD_IO0CURA;
+ iomd_dma[DMA_0].base = IOMD_BASE + IOMD_IO0CURA;
iomd_dma[DMA_0].irq = IRQ_DMA0;
- iomd_dma[DMA_1].base = IOMD_IO1CURA;
+ iomd_dma[DMA_1].base = IOMD_BASE + IOMD_IO1CURA;
iomd_dma[DMA_1].irq = IRQ_DMA1;
- iomd_dma[DMA_2].base = IOMD_IO2CURA;
+ iomd_dma[DMA_2].base = IOMD_BASE + IOMD_IO2CURA;
iomd_dma[DMA_2].irq = IRQ_DMA2;
- iomd_dma[DMA_3].base = IOMD_IO3CURA;
+ iomd_dma[DMA_3].base = IOMD_BASE + IOMD_IO3CURA;
iomd_dma[DMA_3].irq = IRQ_DMA3;
- iomd_dma[DMA_S0].base = IOMD_SD0CURA;
+ iomd_dma[DMA_S0].base = IOMD_BASE + IOMD_SD0CURA;
iomd_dma[DMA_S0].irq = IRQ_DMAS0;
- iomd_dma[DMA_S1].base = IOMD_SD1CURA;
+ iomd_dma[DMA_S1].base = IOMD_BASE + IOMD_SD1CURA;
iomd_dma[DMA_S1].irq = IRQ_DMAS1;
for (i = DMA_0; i <= DMA_S1; i++) {
diff --git a/arch/arm/mach-rpc/ecard-loader.S b/arch/arm/mach-rpc/ecard-loader.S
new file mode 100644
index 000000000000..eb8ac0412da6
--- /dev/null
+++ b/arch/arm/mach-rpc/ecard-loader.S
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/arch/arm/lib/ecard.S
+ *
+ * Copyright (C) 1995, 1996 Russell King
+ *
+ * 27/03/03 Ian Molton Clean up CONFIG_CPU
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+#define CPSR2SPSR(rt) \
+ mrs rt, cpsr; \
+ msr spsr_cxsf, rt
+
+@ Purpose: call an expansion card loader to read bytes.
+@ Proto : char read_loader(int offset, char *card_base, char *loader);
+@ Returns: byte read
+
+ENTRY(ecard_loader_read)
+ stmfd sp!, {r4 - r12, lr}
+ mov r11, r1
+ mov r1, r0
+ CPSR2SPSR(r0)
+ mov lr, pc
+ mov pc, r2
+ ldmfd sp!, {r4 - r12, pc}
+
+@ Purpose: call an expansion card loader to reset the card
+@ Proto : void read_loader(int card_base, char *loader);
+@ Returns: byte read
+
+ENTRY(ecard_loader_reset)
+ stmfd sp!, {r4 - r12, lr}
+ mov r11, r0
+ CPSR2SPSR(r0)
+ mov lr, pc
+ add pc, r1, #8
+ ldmfd sp!, {r4 - r12, pc}
+
diff --git a/arch/arm/mach-rpc/ecard.c b/arch/arm/mach-rpc/ecard.c
index cf0593bc42d2..75cfad2cb143 100644
--- a/arch/arm/mach-rpc/ecard.c
+++ b/arch/arm/mach-rpc/ecard.c
@@ -67,17 +67,21 @@ struct expcard_blacklist {
unsigned short manufacturer;
unsigned short product;
const char *type;
+ void (*init)(ecard_t *ec);
};
static ecard_t *cards;
static ecard_t *slot_to_expcard[MAX_ECARDS];
static unsigned int ectcr;
+static void atomwide_3p_quirk(ecard_t *ec);
+
/* List of descriptions of cards which don't have an extended
* identification, or chunk directories containing a description.
*/
static struct expcard_blacklist __initdata blacklist[] = {
- { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
+ { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" },
+ { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, NULL, atomwide_3p_quirk },
};
asmlinkage extern int
@@ -493,18 +497,21 @@ static void ecard_dump_irq_state(void)
printk("Expansion card IRQ state:\n");
for (ec = cards; ec; ec = ec->next) {
+ const char *claimed;
+
if (ec->slot_no == 8)
continue;
- printk(" %d: %sclaimed, ",
- ec->slot_no, ec->claimed ? "" : "not ");
+ claimed = ec->claimed ? "" : "not ";
if (ec->ops && ec->ops->irqpending &&
ec->ops != &ecard_default_ops)
- printk("irq %spending\n",
+ printk(" %d: %sclaimed irq %spending\n",
+ ec->slot_no, claimed,
ec->ops->irqpending(ec) ? "" : "not ");
else
- printk("irqaddr %p, mask = %02X, status = %02X\n",
+ printk(" %d: %sclaimed irqaddr %p, mask = %02X, status = %02X\n",
+ ec->slot_no, claimed,
ec->irqaddr, ec->irqmask, readb(ec->irqaddr));
}
}
@@ -865,6 +872,16 @@ void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res,
}
EXPORT_SYMBOL(ecardm_iomap);
+static void atomwide_3p_quirk(ecard_t *ec)
+{
+ void __iomem *addr = __ecard_address(ec, ECARD_IOC, ECARD_SYNC);
+ unsigned int i;
+
+ /* Disable interrupts on each port */
+ for (i = 0x2000; i <= 0x2800; i += 0x0400)
+ writeb(0, addr + i + 4);
+}
+
/*
* Probe for an expansion card.
*
@@ -921,7 +938,10 @@ static int __init ecard_probe(int slot, unsigned irq, card_type_t type)
for (i = 0; i < ARRAY_SIZE(blacklist); i++)
if (blacklist[i].manufacturer == ec->cid.manufacturer &&
blacklist[i].product == ec->cid.product) {
- ec->card_desc = blacklist[i].type;
+ if (blacklist[i].type)
+ ec->card_desc = blacklist[i].type;
+ if (blacklist[i].init)
+ blacklist[i].init(ec);
break;
}
diff --git a/arch/arm/mach-rpc/floppydma.S b/arch/arm/mach-rpc/floppydma.S
new file mode 100644
index 000000000000..6698b83050dc
--- /dev/null
+++ b/arch/arm/mach-rpc/floppydma.S
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/arch/arm/lib/floppydma.S
+ *
+ * Copyright (C) 1995, 1996 Russell King
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+ .text
+
+ .global floppy_fiqin_end
+ENTRY(floppy_fiqin_start)
+ subs r9, r9, #1
+ ldrbgt r12, [r11, #-4]
+ ldrble r12, [r11], #0
+ strb r12, [r10], #1
+ subs pc, lr, #4
+floppy_fiqin_end:
+
+ .global floppy_fiqout_end
+ENTRY(floppy_fiqout_start)
+ subs r9, r9, #1
+ ldrbge r12, [r10], #1
+ movlt r12, #0
+ strble r12, [r11], #0
+ subsle pc, lr, #4
+ strb r12, [r11, #-4]
+ subs pc, lr, #4
+floppy_fiqout_end:
diff --git a/arch/arm/mach-rpc/include/mach/uncompress.h b/arch/arm/mach-rpc/include/mach/uncompress.h
index a023b5f9bbbb..1fbe7eb956fd 100644
--- a/arch/arm/mach-rpc/include/mach/uncompress.h
+++ b/arch/arm/mach-rpc/include/mach/uncompress.h
@@ -115,29 +115,22 @@ static void arch_decomp_setup(void)
struct tag *t = (struct tag *)params;
unsigned int nr_pages = 0, page_size = PAGE_SIZE;
- if (t->hdr.tag == ATAG_CORE)
- {
- for (; t->hdr.size; t = tag_next(t))
- {
- if (t->hdr.tag == ATAG_VIDEOTEXT)
- {
+ if (t->hdr.tag == ATAG_CORE) {
+ for (; t->hdr.size; t = tag_next(t)) {
+ if (t->hdr.tag == ATAG_VIDEOTEXT) {
video_num_rows = t->u.videotext.video_lines;
video_num_cols = t->u.videotext.video_cols;
- bytes_per_char_h = t->u.videotext.video_points;
- bytes_per_char_v = t->u.videotext.video_points;
video_x = t->u.videotext.x;
video_y = t->u.videotext.y;
- }
-
- if (t->hdr.tag == ATAG_MEM)
- {
+ } else if (t->hdr.tag == ATAG_VIDEOLFB) {
+ bytes_per_char_h = t->u.videolfb.lfb_depth;
+ bytes_per_char_v = 8;
+ } else if (t->hdr.tag == ATAG_MEM) {
page_size = PAGE_SIZE;
nr_pages += (t->u.mem.size / PAGE_SIZE);
}
}
- }
- else
- {
+ } else {
nr_pages = params->nr_pages;
page_size = params->page_size;
video_num_rows = params->video_num_rows;
diff --git a/arch/arm/mach-rpc/io-acorn.S b/arch/arm/mach-rpc/io-acorn.S
new file mode 100644
index 000000000000..b9082a2a2a01
--- /dev/null
+++ b/arch/arm/mach-rpc/io-acorn.S
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/arch/arm/lib/io-acorn.S
+ *
+ * Copyright (C) 1995, 1996 Russell King
+ *
+ * 27/03/03 Ian Molton Clean up CONFIG_CPU
+ */
+#include <linux/linkage.h>
+#include <linux/kern_levels.h>
+#include <asm/assembler.h>
+
+ .text
+ .align
+
+.Liosl_warning:
+ .ascii KERN_WARNING "insl/outsl not implemented, called from %08lX\0"
+ .align
+
+/*
+ * These make no sense on Acorn machines.
+ * Print a warning message.
+ */
+ENTRY(insl)
+ENTRY(outsl)
+ adr r0, .Liosl_warning
+ mov r1, lr
+ b printk
diff --git a/arch/arm/mach-rpc/irq.c b/arch/arm/mach-rpc/irq.c
index b8a61cb11207..803aeb126f0e 100644
--- a/arch/arm/mach-rpc/irq.c
+++ b/arch/arm/mach-rpc/irq.c
@@ -8,117 +8,71 @@
#include <asm/irq.h>
#include <asm/fiq.h>
-static void iomd_ack_irq_a(struct irq_data *d)
-{
- unsigned int val, mask;
-
- mask = 1 << d->irq;
- val = iomd_readb(IOMD_IRQMASKA);
- iomd_writeb(val & ~mask, IOMD_IRQMASKA);
- iomd_writeb(mask, IOMD_IRQCLRA);
-}
-
-static void iomd_mask_irq_a(struct irq_data *d)
-{
- unsigned int val, mask;
+// These are offsets from the stat register for each IRQ bank
+#define STAT 0x00
+#define REQ 0x04
+#define CLR 0x04
+#define MASK 0x08
- mask = 1 << d->irq;
- val = iomd_readb(IOMD_IRQMASKA);
- iomd_writeb(val & ~mask, IOMD_IRQMASKA);
-}
-
-static void iomd_unmask_irq_a(struct irq_data *d)
+static void __iomem *iomd_get_base(struct irq_data *d)
{
- unsigned int val, mask;
+ void *cd = irq_data_get_irq_chip_data(d);
- mask = 1 << d->irq;
- val = iomd_readb(IOMD_IRQMASKA);
- iomd_writeb(val | mask, IOMD_IRQMASKA);
+ return (void __iomem *)(unsigned long)cd;
}
-static struct irq_chip iomd_a_chip = {
- .irq_ack = iomd_ack_irq_a,
- .irq_mask = iomd_mask_irq_a,
- .irq_unmask = iomd_unmask_irq_a,
-};
-
-static void iomd_mask_irq_b(struct irq_data *d)
+static void iomd_set_base_mask(unsigned int irq, void __iomem *base, u32 mask)
{
- unsigned int val, mask;
+ struct irq_data *d = irq_get_irq_data(irq);
- mask = 1 << (d->irq & 7);
- val = iomd_readb(IOMD_IRQMASKB);
- iomd_writeb(val & ~mask, IOMD_IRQMASKB);
+ d->mask = mask;
+ irq_set_chip_data(irq, (void *)(unsigned long)base);
}
-static void iomd_unmask_irq_b(struct irq_data *d)
+static void iomd_irq_mask_ack(struct irq_data *d)
{
- unsigned int val, mask;
+ void __iomem *base = iomd_get_base(d);
+ unsigned int val, mask = d->mask;
- mask = 1 << (d->irq & 7);
- val = iomd_readb(IOMD_IRQMASKB);
- iomd_writeb(val | mask, IOMD_IRQMASKB);
+ val = readb(base + MASK);
+ writeb(val & ~mask, base + MASK);
+ writeb(mask, base + CLR);
}
-static struct irq_chip iomd_b_chip = {
- .irq_ack = iomd_mask_irq_b,
- .irq_mask = iomd_mask_irq_b,
- .irq_unmask = iomd_unmask_irq_b,
-};
-
-static void iomd_mask_irq_dma(struct irq_data *d)
+static void iomd_irq_mask(struct irq_data *d)
{
- unsigned int val, mask;
+ void __iomem *base = iomd_get_base(d);
+ unsigned int val, mask = d->mask;
- mask = 1 << (d->irq & 7);
- val = iomd_readb(IOMD_DMAMASK);
- iomd_writeb(val & ~mask, IOMD_DMAMASK);
+ val = readb(base + MASK);
+ writeb(val & ~mask, base + MASK);
}
-static void iomd_unmask_irq_dma(struct irq_data *d)
+static void iomd_irq_unmask(struct irq_data *d)
{
- unsigned int val, mask;
+ void __iomem *base = iomd_get_base(d);
+ unsigned int val, mask = d->mask;
- mask = 1 << (d->irq & 7);
- val = iomd_readb(IOMD_DMAMASK);
- iomd_writeb(val | mask, IOMD_DMAMASK);
+ val = readb(base + MASK);
+ writeb(val | mask, base + MASK);
}
-static struct irq_chip iomd_dma_chip = {
- .irq_ack = iomd_mask_irq_dma,
- .irq_mask = iomd_mask_irq_dma,
- .irq_unmask = iomd_unmask_irq_dma,
+static struct irq_chip iomd_chip_clr = {
+ .irq_mask_ack = iomd_irq_mask_ack,
+ .irq_mask = iomd_irq_mask,
+ .irq_unmask = iomd_irq_unmask,
};
-static void iomd_mask_irq_fiq(struct irq_data *d)
-{
- unsigned int val, mask;
-
- mask = 1 << (d->irq & 7);
- val = iomd_readb(IOMD_FIQMASK);
- iomd_writeb(val & ~mask, IOMD_FIQMASK);
-}
-
-static void iomd_unmask_irq_fiq(struct irq_data *d)
-{
- unsigned int val, mask;
-
- mask = 1 << (d->irq & 7);
- val = iomd_readb(IOMD_FIQMASK);
- iomd_writeb(val | mask, IOMD_FIQMASK);
-}
-
-static struct irq_chip iomd_fiq_chip = {
- .irq_ack = iomd_mask_irq_fiq,
- .irq_mask = iomd_mask_irq_fiq,
- .irq_unmask = iomd_unmask_irq_fiq,
+static struct irq_chip iomd_chip_noclr = {
+ .irq_mask = iomd_irq_mask,
+ .irq_unmask = iomd_irq_unmask,
};
extern unsigned char rpc_default_fiq_start, rpc_default_fiq_end;
void __init rpc_init_irq(void)
{
- unsigned int irq, clr, set = 0;
+ unsigned int irq, clr, set;
iomd_writeb(0, IOMD_IRQMASKA);
iomd_writeb(0, IOMD_IRQMASKB);
@@ -130,6 +84,7 @@ void __init rpc_init_irq(void)
for (irq = 0; irq < NR_IRQS; irq++) {
clr = IRQ_NOREQUEST;
+ set = 0;
if (irq <= 6 || (irq >= 9 && irq <= 15))
clr |= IRQ_NOPROBE;
@@ -140,30 +95,37 @@ void __init rpc_init_irq(void)
switch (irq) {
case 0 ... 7:
- irq_set_chip_and_handler(irq, &iomd_a_chip,
+ irq_set_chip_and_handler(irq, &iomd_chip_clr,
handle_level_irq);
irq_modify_status(irq, clr, set);
+ iomd_set_base_mask(irq, IOMD_BASE + IOMD_IRQSTATA,
+ BIT(irq));
break;
case 8 ... 15:
- irq_set_chip_and_handler(irq, &iomd_b_chip,
+ irq_set_chip_and_handler(irq, &iomd_chip_noclr,
handle_level_irq);
irq_modify_status(irq, clr, set);
+ iomd_set_base_mask(irq, IOMD_BASE + IOMD_IRQSTATB,
+ BIT(irq - 8));
break;
case 16 ... 21:
- irq_set_chip_and_handler(irq, &iomd_dma_chip,
+ irq_set_chip_and_handler(irq, &iomd_chip_noclr,
handle_level_irq);
irq_modify_status(irq, clr, set);
+ iomd_set_base_mask(irq, IOMD_BASE + IOMD_DMASTAT,
+ BIT(irq - 16));
break;
case 64 ... 71:
- irq_set_chip(irq, &iomd_fiq_chip);
+ irq_set_chip(irq, &iomd_chip_noclr);
irq_modify_status(irq, clr, set);
+ iomd_set_base_mask(irq, IOMD_BASE + IOMD_FIQSTAT,
+ BIT(irq - 64));
break;
}
}
init_FIQ(FIQ_START);
}
-
diff --git a/arch/arm/mach-rpc/time.c b/arch/arm/mach-rpc/time.c
index e97f93a0af1d..1d750152b160 100644
--- a/arch/arm/mach-rpc/time.c
+++ b/arch/arm/mach-rpc/time.c
@@ -10,7 +10,7 @@
* 04-Dec-1997 RMK Updated for new arch/arm/time.c
* 13=Jun-2004 DS Moved to arch/arm/common b/c shared w/CLPS7500
*/
-#include <linux/timex.h>
+#include <linux/clocksource.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
@@ -24,11 +24,15 @@
#define RPC_CLOCK_FREQ 2000000
#define RPC_LATCH DIV_ROUND_CLOSEST(RPC_CLOCK_FREQ, HZ)
-static u32 ioc_timer_gettimeoffset(void)
+static u32 ioc_time;
+
+static u64 ioc_timer_read(struct clocksource *cs)
{
unsigned int count1, count2, status;
- long offset;
+ unsigned long flags;
+ u32 ticks;
+ local_irq_save(flags);
ioc_writeb (0, IOC_T0LATCH);
barrier ();
count1 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
@@ -38,27 +42,34 @@ static u32 ioc_timer_gettimeoffset(void)
ioc_writeb (0, IOC_T0LATCH);
barrier ();
count2 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
+ ticks = ioc_time + RPC_LATCH - count2;
+ local_irq_restore(flags);
- offset = count2;
if (count2 < count1) {
/*
- * We have not had an interrupt between reading count1
- * and count2.
+ * The timer has not reloaded between reading count1 and
+ * count2, check whether an interrupt was actually pending.
*/
if (status & (1 << 5))
- offset -= RPC_LATCH;
+ ticks += RPC_LATCH;
} else if (count2 > count1) {
/*
- * We have just had another interrupt between reading
- * count1 and count2.
+ * The timer has reloaded, so count2 indicates the new
+ * count since the wrap. The interrupt would not have
+ * been processed, so add the missed ticks.
*/
- offset -= RPC_LATCH;
+ ticks += RPC_LATCH;
}
- offset = (RPC_LATCH - offset) * (tick_nsec / 1000);
- return DIV_ROUND_CLOSEST(offset, RPC_LATCH) * 1000;
+ return ticks;
}
+static struct clocksource ioctime_clocksource = {
+ .read = ioc_timer_read,
+ .mask = CLOCKSOURCE_MASK(32),
+ .rating = 100,
+};
+
void __init ioctime_init(void)
{
ioc_writeb(RPC_LATCH & 255, IOC_T0LTCHL);
@@ -69,6 +80,7 @@ void __init ioctime_init(void)
static irqreturn_t
ioc_timer_interrupt(int irq, void *dev_id)
{
+ ioc_time += RPC_LATCH;
timer_tick();
return IRQ_HANDLED;
}
@@ -83,7 +95,7 @@ static struct irqaction ioc_timer_irq = {
*/
void __init ioc_timer_init(void)
{
- arch_gettimeoffset = ioc_timer_gettimeoffset;
+ WARN_ON(clocksource_register_hz(&ioctime_clocksource, RPC_CLOCK_FREQ));
ioctime_init();
setup_irq(IRQ_TIMER0, &ioc_timer_irq);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 21:12:07 +0100