diff options
author | Maxime Bizon <mbizon@freebox.fr> | 2011-11-04 19:09:34 +0100 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2011-12-07 22:03:04 +0000 |
commit | 6224892c819e96898534c107c72b80a1a8e75abf (patch) | |
tree | 4f9f2bc957b221f7dd6f6daea7d993c78813b9ad /arch/mips/bcm63xx/irq.c | |
parent | 71a43927b3bfe1a42cbf7bb174b170f06fa00a1a (diff) | |
download | op-kernel-dev-6224892c819e96898534c107c72b80a1a8e75abf.zip op-kernel-dev-6224892c819e96898534c107c72b80a1a8e75abf.tar.gz |
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>
Diffstat (limited to 'arch/mips/bcm63xx/irq.c')
-rw-r--r-- | arch/mips/bcm63xx/irq.c | 131 |
1 files changed, 102 insertions, 29 deletions
diff --git a/arch/mips/bcm63xx/irq.c b/arch/mips/bcm63xx/irq.c index 11f8942..9f53884 100644 --- a/arch/mips/bcm63xx/irq.c +++ b/arch/mips/bcm63xx/irq.c @@ -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; + + regaddr = get_ext_irq_perf_reg(irq); + reg = bcm_perf_readl(regaddr); - reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG); - reg |= EXTIRQ_CFG_CLEAR(irq); - bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG); + 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); } |