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MIPS: BCM63XX: Add external irq support for non 6348 CPUs. 

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2899/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maxime Bizon 2011-11-04 19:09:34 +01:00 committed by Ralf Baechle
parent 71a43927b3
commit 6224892c81
3 changed files with 149 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

131
arch/mips/bcm63xx/irq.c
View File

@ -34,6 +34,9 @@ static void __internal_irq_unmask_64(unsigned int irq) __maybe_unused;
#define is_ext_irq_cascaded 0
#define ext_irq_start 0
#define ext_irq_end 0
#define ext_irq_count 4
#define ext_irq_cfg_reg1 PERF_EXTIRQ_CFG_REG_6338
#define ext_irq_cfg_reg2 0
#endif
#ifdef CONFIG_BCM63XX_CPU_6345
#define irq_stat_reg PERF_IRQSTAT_6345_REG
@ -42,6 +45,9 @@ static void __internal_irq_unmask_64(unsigned int irq) __maybe_unused;
#define is_ext_irq_cascaded 0
#define ext_irq_start 0
#define ext_irq_end 0
#define ext_irq_count 0
#define ext_irq_cfg_reg1 0
#define ext_irq_cfg_reg2 0
#endif
#ifdef CONFIG_BCM63XX_CPU_6348
#define irq_stat_reg PERF_IRQSTAT_6348_REG
@ -50,6 +56,9 @@ static void __internal_irq_unmask_64(unsigned int irq) __maybe_unused;
#define is_ext_irq_cascaded 0
#define ext_irq_start 0
#define ext_irq_end 0
#define ext_irq_count 4
#define ext_irq_cfg_reg1 PERF_EXTIRQ_CFG_REG_6348
#define ext_irq_cfg_reg2 0
#endif
#ifdef CONFIG_BCM63XX_CPU_6358
#define irq_stat_reg PERF_IRQSTAT_6358_REG
@ -58,6 +67,9 @@ static void __internal_irq_unmask_64(unsigned int irq) __maybe_unused;
#define is_ext_irq_cascaded 1
#define ext_irq_start (BCM_6358_EXT_IRQ0 - IRQ_INTERNAL_BASE)
#define ext_irq_end (BCM_6358_EXT_IRQ3 - IRQ_INTERNAL_BASE)
#define ext_irq_count 4
#define ext_irq_cfg_reg1 PERF_EXTIRQ_CFG_REG_6358
#define ext_irq_cfg_reg2 0
#endif
#if irq_bits == 32
@ -81,7 +93,9 @@ static inline void bcm63xx_init_irq(void)
static u32 irq_stat_addr, irq_mask_addr;
static void (*dispatch_internal)(void);
static int is_ext_irq_cascaded;
static unsigned int ext_irq_count;
static unsigned int ext_irq_start, ext_irq_end;
static unsigned int ext_irq_cfg_reg1, ext_irq_cfg_reg2;
static void (*internal_irq_mask)(unsigned int irq);
static void (*internal_irq_unmask)(unsigned int irq);
@ -107,14 +121,18 @@ static void bcm63xx_init_irq(void)
irq_stat_addr += PERF_IRQSTAT_6348_REG;
irq_mask_addr += PERF_IRQMASK_6348_REG;
irq_bits = 32;
ext_irq_count = 4;
ext_irq_cfg_reg1 = PERF_EXTIRQ_CFG_REG_6348;
break;
case BCM6358_CPU_ID:
irq_stat_addr += PERF_IRQSTAT_6358_REG;
irq_mask_addr += PERF_IRQMASK_6358_REG;
irq_bits = 32;
ext_irq_count = 4;
is_ext_irq_cascaded = 1;
ext_irq_start = BCM_6358_EXT_IRQ0 - IRQ_INTERNAL_BASE;
ext_irq_end = BCM_6358_EXT_IRQ3 - IRQ_INTERNAL_BASE;
ext_irq_cfg_reg1 = PERF_EXTIRQ_CFG_REG_6358;
break;
default:
BUG();
@ -132,6 +150,13 @@ static void bcm63xx_init_irq(void)
}
#endif /* ! BCMCPU_RUNTIME_DETECT */
static inline u32 get_ext_irq_perf_reg(int irq)
{
if (irq < 4)
return ext_irq_cfg_reg1;
return ext_irq_cfg_reg2;
}
static inline void handle_internal(int intbit)
{
if (is_ext_irq_cascaded &&
@ -273,11 +298,17 @@ static void bcm63xx_internal_irq_unmask(struct irq_data *d)
static void bcm63xx_external_irq_mask(struct irq_data *d)
{
unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
u32 reg;
u32 reg, regaddr;
reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG);
reg &= ~EXTIRQ_CFG_MASK(irq);
bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG);
regaddr = get_ext_irq_perf_reg(irq);
reg = bcm_perf_readl(regaddr);
if (BCMCPU_IS_6348())
reg &= ~EXTIRQ_CFG_MASK_6348(irq % 4);
else
reg &= ~EXTIRQ_CFG_MASK(irq % 4);
bcm_perf_writel(reg, regaddr);
if (is_ext_irq_cascaded)
internal_irq_mask(irq + ext_irq_start);
}
@ -285,11 +316,18 @@ static void bcm63xx_external_irq_mask(struct irq_data *d)
static void bcm63xx_external_irq_unmask(struct irq_data *d)
{
unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
u32 reg;
u32 reg, regaddr;
regaddr = get_ext_irq_perf_reg(irq);
reg = bcm_perf_readl(regaddr);
if (BCMCPU_IS_6348())
reg |= EXTIRQ_CFG_MASK_6348(irq % 4);
else
reg |= EXTIRQ_CFG_MASK(irq % 4);
bcm_perf_writel(reg, regaddr);
reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG);
reg |= EXTIRQ_CFG_MASK(irq);
bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG);
if (is_ext_irq_cascaded)
internal_irq_unmask(irq + ext_irq_start);
}
@ -297,58 +335,93 @@ static void bcm63xx_external_irq_unmask(struct irq_data *d)
static void bcm63xx_external_irq_clear(struct irq_data *d)
{
unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
u32 reg;
u32 reg, regaddr;
reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG);
reg |= EXTIRQ_CFG_CLEAR(irq);
bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG);
regaddr = get_ext_irq_perf_reg(irq);
reg = bcm_perf_readl(regaddr);
if (BCMCPU_IS_6348())
reg |= EXTIRQ_CFG_CLEAR_6348(irq % 4);
else
reg |= EXTIRQ_CFG_CLEAR(irq % 4);
bcm_perf_writel(reg, regaddr);
}
static int bcm63xx_external_irq_set_type(struct irq_data *d,
unsigned int flow_type)
{
unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
u32 reg;
u32 reg, regaddr;
int levelsense, sense, bothedge;
flow_type &= IRQ_TYPE_SENSE_MASK;
if (flow_type == IRQ_TYPE_NONE)
flow_type = IRQ_TYPE_LEVEL_LOW;
reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG);
levelsense = sense = bothedge = 0;
switch (flow_type) {
case IRQ_TYPE_EDGE_BOTH:
reg &= ~EXTIRQ_CFG_LEVELSENSE(irq);
reg |= EXTIRQ_CFG_BOTHEDGE(irq);
bothedge = 1;
break;
case IRQ_TYPE_EDGE_RISING:
reg &= ~EXTIRQ_CFG_LEVELSENSE(irq);
reg |= EXTIRQ_CFG_SENSE(irq);
reg &= ~EXTIRQ_CFG_BOTHEDGE(irq);
sense = 1;
break;
case IRQ_TYPE_EDGE_FALLING:
reg &= ~EXTIRQ_CFG_LEVELSENSE(irq);
reg &= ~EXTIRQ_CFG_SENSE(irq);
reg &= ~EXTIRQ_CFG_BOTHEDGE(irq);
break;
case IRQ_TYPE_LEVEL_HIGH:
reg |= EXTIRQ_CFG_LEVELSENSE(irq);
reg |= EXTIRQ_CFG_SENSE(irq);
levelsense = 1;
sense = 1;
break;
case IRQ_TYPE_LEVEL_LOW:
reg |= EXTIRQ_CFG_LEVELSENSE(irq);
reg &= ~EXTIRQ_CFG_SENSE(irq);
levelsense = 1;
break;
default:
printk(KERN_ERR "bogus flow type combination given !\n");
return -EINVAL;
}
bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG);
regaddr = get_ext_irq_perf_reg(irq);
reg = bcm_perf_readl(regaddr);
irq %= 4;
if (BCMCPU_IS_6348()) {
if (levelsense)
reg |= EXTIRQ_CFG_LEVELSENSE_6348(irq);
else
reg &= ~EXTIRQ_CFG_LEVELSENSE_6348(irq);
if (sense)
reg |= EXTIRQ_CFG_SENSE_6348(irq);
else
reg &= ~EXTIRQ_CFG_SENSE_6348(irq);
if (bothedge)
reg |= EXTIRQ_CFG_BOTHEDGE_6348(irq);
else
reg &= ~EXTIRQ_CFG_BOTHEDGE_6348(irq);
}
if (BCMCPU_IS_6338() || BCMCPU_IS_6358()) {
if (levelsense)
reg |= EXTIRQ_CFG_LEVELSENSE(irq);
else
reg &= ~EXTIRQ_CFG_LEVELSENSE(irq);
if (sense)
reg |= EXTIRQ_CFG_SENSE(irq);
else
reg &= ~EXTIRQ_CFG_SENSE(irq);
if (bothedge)
reg |= EXTIRQ_CFG_BOTHEDGE(irq);
else
reg &= ~EXTIRQ_CFG_BOTHEDGE(irq);
}
bcm_perf_writel(reg, regaddr);
irqd_set_trigger_type(d, flow_type);
if (flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
@ -397,12 +470,12 @@ void __init arch_init_irq(void)
irq_set_chip_and_handler(i, &bcm63xx_internal_irq_chip,
handle_level_irq);
for (i = IRQ_EXTERNAL_BASE; i < IRQ_EXTERNAL_BASE + 4; ++i)
for (i = IRQ_EXTERNAL_BASE; i < IRQ_EXTERNAL_BASE + ext_irq_count; ++i)
irq_set_chip_and_handler(i, &bcm63xx_external_irq_chip,
handle_edge_irq);
if (!is_ext_irq_cascaded) {
for (i = 3; i < 7; ++i)
for (i = 3; i < 3 + ext_irq_count; ++i)
setup_irq(MIPS_CPU_IRQ_BASE + i, &cpu_ext_cascade_action);
}

30
arch/mips/bcm63xx/setup.c
View File

@ -63,13 +63,33 @@ static void bcm6348_a1_reboot(void)
void bcm63xx_machine_reboot(void)
{
u32 reg;
u32 reg, perf_regs[2] = { 0, 0 };
unsigned int i;
/* mask and clear all external irq */
reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG);
reg &= ~EXTIRQ_CFG_MASK_ALL;
reg |= EXTIRQ_CFG_CLEAR_ALL;
bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG);
switch (bcm63xx_get_cpu_id()) {
case BCM6338_CPU_ID:
perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
break;
case BCM6348_CPU_ID:
perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
break;
case BCM6358_CPU_ID:
perf_regs[0] = PERF_EXTIRQ_CFG_REG_6358;
break;
}
for (i = 0; i < 2; i++) {
reg = bcm_perf_readl(perf_regs[i]);
if (BCMCPU_IS_6348()) {
reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
reg |= EXTIRQ_CFG_CLEAR_ALL_6348;
} else {
reg &= ~EXTIRQ_CFG_MASK_ALL;
reg |= EXTIRQ_CFG_CLEAR_ALL;
}
bcm_perf_writel(reg, perf_regs[i]);
}
if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
bcm6348_a1_reboot();

31
arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
View File

@ -100,16 +100,29 @@
#define PERF_IRQSTAT_6358_REG 0x10
/* External Interrupt Configuration register */
#define PERF_EXTIRQ_CFG_REG 0x14
#define EXTIRQ_CFG_SENSE(x) (1 << (x))
#define EXTIRQ_CFG_STAT(x) (1 << (x + 5))
#define EXTIRQ_CFG_CLEAR(x) (1 << (x + 10))
#define EXTIRQ_CFG_MASK(x) (1 << (x + 15))
#define EXTIRQ_CFG_BOTHEDGE(x) (1 << (x + 20))
#define EXTIRQ_CFG_LEVELSENSE(x) (1 << (x + 25))
#define PERF_EXTIRQ_CFG_REG_6338 0x14
#define PERF_EXTIRQ_CFG_REG_6348 0x14
#define PERF_EXTIRQ_CFG_REG_6358 0x14
#define EXTIRQ_CFG_CLEAR_ALL (0xf << 10)
#define EXTIRQ_CFG_MASK_ALL (0xf << 15)
/* for 6348 only */
#define EXTIRQ_CFG_SENSE_6348(x) (1 << (x))
#define EXTIRQ_CFG_STAT_6348(x) (1 << (x + 5))
#define EXTIRQ_CFG_CLEAR_6348(x) (1 << (x + 10))
#define EXTIRQ_CFG_MASK_6348(x) (1 << (x + 15))
#define EXTIRQ_CFG_BOTHEDGE_6348(x) (1 << (x + 20))
#define EXTIRQ_CFG_LEVELSENSE_6348(x) (1 << (x + 25))
#define EXTIRQ_CFG_CLEAR_ALL_6348 (0xf << 10)
#define EXTIRQ_CFG_MASK_ALL_6348 (0xf << 15)
/* for all others */
#define EXTIRQ_CFG_SENSE(x) (1 << (x))
#define EXTIRQ_CFG_STAT(x) (1 << (x + 4))
#define EXTIRQ_CFG_CLEAR(x) (1 << (x + 8))
#define EXTIRQ_CFG_MASK(x) (1 << (x + 12))
#define EXTIRQ_CFG_BOTHEDGE(x) (1 << (x + 16))
#define EXTIRQ_CFG_LEVELSENSE(x) (1 << (x + 20))
#define EXTIRQ_CFG_CLEAR_ALL (0xf << 8)
#define EXTIRQ_CFG_MASK_ALL (0xf << 12)
/* Soft Reset register */
#define PERF_SOFTRESET_REG 0x28