diff mbox series

[5/6] irqchip/loongson-liointc: irqchip add 2.0 version.

Message ID 20210209093224.7085-6-zhangqing@loongson.cn (mailing list archive)
State Superseded
Headers show
Series Add basic support for Loongson-2K1000 | expand

Commit Message

Qing Zhang Feb. 9, 2021, 9:32 a.m. UTC 
Add IO interrupt controller support for Loongson 2k1000, different
from the 3a series is that 2K1000 has 64 interrupt sources, 0-31
correspond to the device tree liointc0 device node, and the other
correspond to liointc1 node.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Xingxing Su <suxingxing@loongson.cn>
---
 drivers/irqchip/irq-loongson-liointc.c | 55 +++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 9 deletions(-)

Comments

Jiaxun Yang Feb. 10, 2021, 11:17 a.m. UTC | #1 
On Tue, Feb 9, 2021, at 5:32 PM, Qing Zhang wrote:
> Add IO interrupt controller support for Loongson 2k1000, different
> from the 3a series is that 2K1000 has 64 interrupt sources, 0-31
> correspond to the device tree liointc0 device node, and the other
> correspond to liointc1 node.
> 
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
> Signed-off-by: Xingxing Su <suxingxing@loongson.cn>

You should document dt binding changes.

Thanks

- Jiaxun

> ---
>  drivers/irqchip/irq-loongson-liointc.c | 55 +++++++++++++++++++++-----
>  1 file changed, 46 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/irqchip/irq-loongson-liointc.c 
> b/drivers/irqchip/irq-loongson-liointc.c
> index 9ed1bc473663..496e73bde597 100644
> --- a/drivers/irqchip/irq-loongson-liointc.c
> +++ b/drivers/irqchip/irq-loongson-liointc.c
> @@ -20,6 +20,7 @@
>  
>  #define LIOINTC_CHIP_IRQ	32
>  #define LIOINTC_NUM_PARENT 4
> +#define LIOINTC_NUM_CORES	4
>  
>  #define LIOINTC_INTC_CHIP_START	0x20
>  
> @@ -42,6 +43,7 @@ struct liointc_handler_data {
>  struct liointc_priv {
>  	struct irq_chip_generic		*gc;
>  	struct liointc_handler_data	handler[LIOINTC_NUM_PARENT];
> +	void __iomem			*core_isr[LIOINTC_NUM_CORES];
>  	u8				map_cache[LIOINTC_CHIP_IRQ];
>  	bool				has_lpc_irq_errata;
>  };
> @@ -51,11 +53,12 @@ static void liointc_chained_handle_irq(struct 
> irq_desc *desc)
>  	struct liointc_handler_data *handler = 
> irq_desc_get_handler_data(desc);
>  	struct irq_chip *chip = irq_desc_get_chip(desc);
>  	struct irq_chip_generic *gc = handler->priv->gc;
> +	int core = get_ebase_cpunum() % LIOINTC_NUM_CORES;
>  	u32 pending;
>  
>  	chained_irq_enter(chip, desc);
>  
> -	pending = readl(gc->reg_base + LIOINTC_REG_INTC_STATUS);
> +	pending = readl(handler->priv->core_isr[core]);
>  
>  	if (!pending) {
>  		/* Always blame LPC IRQ if we have that bug */
> @@ -141,6 +144,15 @@ static void liointc_resume(struct irq_chip_generic *gc)
>  }
>  
>  static const char * const parent_names[] = {"int0", "int1", "int2", "int3"};
> +static const char * const core_reg_names[] = {"isr0", "isr1", "isr2", "isr3"};
> +
> +static void __iomem *liointc_get_reg_byname(struct device_node *node,
> +						const char *name)
> +{
> +	int index = of_property_match_string(node, "reg-names", name);
> +
> +	return of_iomap(node, index);
> +}
>  
>  int __init liointc_of_init(struct device_node *node,
>  				struct device_node *parent)
> @@ -159,10 +171,28 @@ int __init liointc_of_init(struct device_node *node,
>  	if (!priv)
>  		return -ENOMEM;
>  
> -	base = of_iomap(node, 0);
> -	if (!base) {
> -		err = -ENODEV;
> -		goto out_free_priv;
> +	if (of_device_is_compatible(node, "loongson,liointc-2.0")) {
> +		base = liointc_get_reg_byname(node, "main");
> +		if (!base) {
> +			err = -ENODEV;
> +			goto out_free_priv;
> +		}
> +		for (i = 0; i < LIOINTC_NUM_CORES; i++) {
> +			priv->core_isr[i] =
> +				liointc_get_reg_byname(node, core_reg_names[i]);
> +		}
> +		if (!priv->core_isr[0]) {
> +			err = -ENODEV;
> +			goto out_iounmap_base;
> +		}
> +	} else {
> +		base = of_iomap(node, 0);
> +		if (!base) {
> +			err = -ENODEV;
> +			goto out_free_priv;
> +		}
> +		for (i = 0; i < LIOINTC_NUM_CORES; i++)
> +			priv->core_isr[i] = base + LIOINTC_REG_INTC_STATUS;
>  	}
>  
>  	for (i = 0; i < LIOINTC_NUM_PARENT; i++) {
> @@ -172,7 +202,7 @@ int __init liointc_of_init(struct device_node *node,
>  	}
>  	if (!have_parent) {
>  		err = -ENODEV;
> -		goto out_iounmap;
> +		goto out_iounmap_isr;
>  	}
>  
>  	sz = of_property_read_variable_u32_array(node,
> @@ -183,7 +213,7 @@ int __init liointc_of_init(struct device_node *node,
>  	if (sz < 4) {
>  		pr_err("loongson-liointc: No parent_int_map\n");
>  		err = -ENODEV;
> -		goto out_iounmap;
> +		goto out_iounmap_isr;
>  	}
>  
>  	for (i = 0; i < LIOINTC_NUM_PARENT; i++)
> @@ -195,7 +225,7 @@ int __init liointc_of_init(struct device_node *node,
>  	if (!domain) {
>  		pr_err("loongson-liointc: cannot add IRQ domain\n");
>  		err = -EINVAL;
> -		goto out_iounmap;
> +		goto out_iounmap_isr;
>  	}
>  
>  	err = irq_alloc_domain_generic_chips(domain, 32, 1,
> @@ -260,7 +290,13 @@ int __init liointc_of_init(struct device_node *node,
>  
>  out_free_domain:
>  	irq_domain_remove(domain);
> -out_iounmap:
> +out_iounmap_isr:
> +	for (i = 0; i < LIOINTC_NUM_CORES; i++) {
> +		if (!priv->core_isr[i])
> +			continue;
> +		iounmap(priv->core_isr[i]);
> +	}
> +out_iounmap_base:
>  	iounmap(base);
>  out_free_priv:
>  	kfree(priv);
> @@ -270,3 +306,4 @@ int __init liointc_of_init(struct device_node *node,
>  
>  IRQCHIP_DECLARE(loongson_liointc_1_0, "loongson,liointc-1.0", 
> liointc_of_init);
>  IRQCHIP_DECLARE(loongson_liointc_1_0a, "loongson,liointc-1.0a", 
> liointc_of_init);
> +IRQCHIP_DECLARE(loongson_liointc_2_0, "loongson,liointc-2.0", 
> liointc_of_init);
> -- 
> 2.20.1
> 
>
diff mbox series

Patch

diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
index 9ed1bc473663..496e73bde597 100644
--- a/drivers/irqchip/irq-loongson-liointc.c
+++ b/drivers/irqchip/irq-loongson-liointc.c
@@ -20,6 +20,7 @@ 
 
 #define LIOINTC_CHIP_IRQ	32
 #define LIOINTC_NUM_PARENT 4
+#define LIOINTC_NUM_CORES	4
 
 #define LIOINTC_INTC_CHIP_START	0x20
 
@@ -42,6 +43,7 @@  struct liointc_handler_data {
 struct liointc_priv {
 	struct irq_chip_generic		*gc;
 	struct liointc_handler_data	handler[LIOINTC_NUM_PARENT];
+	void __iomem			*core_isr[LIOINTC_NUM_CORES];
 	u8				map_cache[LIOINTC_CHIP_IRQ];
 	bool				has_lpc_irq_errata;
 };
@@ -51,11 +53,12 @@  static void liointc_chained_handle_irq(struct irq_desc *desc)
 	struct liointc_handler_data *handler = irq_desc_get_handler_data(desc);
 	struct irq_chip *chip = irq_desc_get_chip(desc);
 	struct irq_chip_generic *gc = handler->priv->gc;
+	int core = get_ebase_cpunum() % LIOINTC_NUM_CORES;
 	u32 pending;
 
 	chained_irq_enter(chip, desc);
 
-	pending = readl(gc->reg_base + LIOINTC_REG_INTC_STATUS);
+	pending = readl(handler->priv->core_isr[core]);
 
 	if (!pending) {
 		/* Always blame LPC IRQ if we have that bug */
@@ -141,6 +144,15 @@  static void liointc_resume(struct irq_chip_generic *gc)
 }
 
 static const char * const parent_names[] = {"int0", "int1", "int2", "int3"};
+static const char * const core_reg_names[] = {"isr0", "isr1", "isr2", "isr3"};
+
+static void __iomem *liointc_get_reg_byname(struct device_node *node,
+						const char *name)
+{
+	int index = of_property_match_string(node, "reg-names", name);
+
+	return of_iomap(node, index);
+}
 
 int __init liointc_of_init(struct device_node *node,
 				struct device_node *parent)
@@ -159,10 +171,28 @@  int __init liointc_of_init(struct device_node *node,
 	if (!priv)
 		return -ENOMEM;
 
-	base = of_iomap(node, 0);
-	if (!base) {
-		err = -ENODEV;
-		goto out_free_priv;
+	if (of_device_is_compatible(node, "loongson,liointc-2.0")) {
+		base = liointc_get_reg_byname(node, "main");
+		if (!base) {
+			err = -ENODEV;
+			goto out_free_priv;
+		}
+		for (i = 0; i < LIOINTC_NUM_CORES; i++) {
+			priv->core_isr[i] =
+				liointc_get_reg_byname(node, core_reg_names[i]);
+		}
+		if (!priv->core_isr[0]) {
+			err = -ENODEV;
+			goto out_iounmap_base;
+		}
+	} else {
+		base = of_iomap(node, 0);
+		if (!base) {
+			err = -ENODEV;
+			goto out_free_priv;
+		}
+		for (i = 0; i < LIOINTC_NUM_CORES; i++)
+			priv->core_isr[i] = base + LIOINTC_REG_INTC_STATUS;
 	}
 
 	for (i = 0; i < LIOINTC_NUM_PARENT; i++) {
@@ -172,7 +202,7 @@  int __init liointc_of_init(struct device_node *node,
 	}
 	if (!have_parent) {
 		err = -ENODEV;
-		goto out_iounmap;
+		goto out_iounmap_isr;
 	}
 
 	sz = of_property_read_variable_u32_array(node,
@@ -183,7 +213,7 @@  int __init liointc_of_init(struct device_node *node,
 	if (sz < 4) {
 		pr_err("loongson-liointc: No parent_int_map\n");
 		err = -ENODEV;
-		goto out_iounmap;
+		goto out_iounmap_isr;
 	}
 
 	for (i = 0; i < LIOINTC_NUM_PARENT; i++)
@@ -195,7 +225,7 @@  int __init liointc_of_init(struct device_node *node,
 	if (!domain) {
 		pr_err("loongson-liointc: cannot add IRQ domain\n");
 		err = -EINVAL;
-		goto out_iounmap;
+		goto out_iounmap_isr;
 	}
 
 	err = irq_alloc_domain_generic_chips(domain, 32, 1,
@@ -260,7 +290,13 @@  int __init liointc_of_init(struct device_node *node,
 
 out_free_domain:
 	irq_domain_remove(domain);
-out_iounmap:
+out_iounmap_isr:
+	for (i = 0; i < LIOINTC_NUM_CORES; i++) {
+		if (!priv->core_isr[i])
+			continue;
+		iounmap(priv->core_isr[i]);
+	}
+out_iounmap_base:
 	iounmap(base);
 out_free_priv:
 	kfree(priv);
@@ -270,3 +306,4 @@  int __init liointc_of_init(struct device_node *node,
 
 IRQCHIP_DECLARE(loongson_liointc_1_0, "loongson,liointc-1.0", liointc_of_init);
 IRQCHIP_DECLARE(loongson_liointc_1_0a, "loongson,liointc-1.0a", liointc_of_init);
+IRQCHIP_DECLARE(loongson_liointc_2_0, "loongson,liointc-2.0", liointc_of_init);