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author | Ludovic Barre <ludovic.barre@st.com> | 2018-04-26 18:18:28 +0200 |
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committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-05-24 12:38:21 +0100 |
commit | f9fc1745501e7b91e5b853e790de63ff9e1a3404 (patch) | |
tree | e6eab7ae16ccacb36b5b1605e39c190d9d8e9a7f /drivers/irqchip/irq-stm32-exti.c | |
parent | d9e2b19b02744068b1cc16ca7d5249a62e789601 (diff) | |
download | linux-f9fc1745501e7b91e5b853e790de63ff9e1a3404.tar.gz linux-f9fc1745501e7b91e5b853e790de63ff9e1a3404.tar.bz2 linux-f9fc1745501e7b91e5b853e790de63ff9e1a3404.zip |
irqchip/stm32: Add host and driver data structures
This patch adds host and driver data structures to support
different stm32 exti controllers with variants.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip/irq-stm32-exti.c')
-rw-r--r-- | drivers/irqchip/irq-stm32-exti.c | 152 |
1 files changed, 104 insertions, 48 deletions
diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c index 1e0966714e83..9655a574c86f 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -29,13 +29,23 @@ struct stm32_exti_bank { #define UNDEF_REG ~0 +struct stm32_exti_drv_data { + const struct stm32_exti_bank **exti_banks; + u32 bank_nr; +}; + struct stm32_exti_chip_data { + struct stm32_exti_host_data *host_data; const struct stm32_exti_bank *reg_bank; u32 rtsr_cache; u32 ftsr_cache; }; -static struct stm32_exti_chip_data *stm32_exti_data; +struct stm32_exti_host_data { + void __iomem *base; + struct stm32_exti_chip_data *chips_data; + const struct stm32_exti_drv_data *drv_data; +}; static const struct stm32_exti_bank stm32f4xx_exti_b1 = { .imr_ofst = 0x00, @@ -51,6 +61,11 @@ static const struct stm32_exti_bank *stm32f4xx_exti_banks[] = { &stm32f4xx_exti_b1, }; +static const struct stm32_exti_drv_data stm32f4xx_drv_data = { + .exti_banks = stm32f4xx_exti_banks, + .bank_nr = ARRAY_SIZE(stm32f4xx_exti_banks), +}; + static const struct stm32_exti_bank stm32h7xx_exti_b1 = { .imr_ofst = 0x80, .emr_ofst = 0x84, @@ -87,6 +102,11 @@ static const struct stm32_exti_bank *stm32h7xx_exti_banks[] = { &stm32h7xx_exti_b3, }; +static const struct stm32_exti_drv_data stm32h7xx_drv_data = { + .exti_banks = stm32h7xx_exti_banks, + .bank_nr = ARRAY_SIZE(stm32h7xx_exti_banks), +}; + static unsigned long stm32_exti_pending(struct irq_chip_generic *gc) { struct stm32_exti_chip_data *chip_data = gc->private; @@ -237,29 +257,85 @@ static void stm32_irq_ack(struct irq_data *d) irq_gc_unlock(gc); } +static struct +stm32_exti_host_data *stm32_exti_host_init(const struct stm32_exti_drv_data *dd, + struct device_node *node) +{ + struct stm32_exti_host_data *host_data; + + host_data = kzalloc(sizeof(*host_data), GFP_KERNEL); + if (!host_data) + return NULL; + + host_data->drv_data = dd; + host_data->chips_data = kcalloc(dd->bank_nr, + sizeof(struct stm32_exti_chip_data), + GFP_KERNEL); + if (!host_data->chips_data) + return NULL; + + host_data->base = of_iomap(node, 0); + if (!host_data->base) { + pr_err("%pOF: Unable to map registers\n", node); + return NULL; + } -static int -__init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks, - int bank_nr, struct device_node *node) + return host_data; +} + +static struct +stm32_exti_chip_data *stm32_exti_chip_init(struct stm32_exti_host_data *h_data, + u32 bank_idx, + struct device_node *node) +{ + const struct stm32_exti_bank *stm32_bank; + struct stm32_exti_chip_data *chip_data; + void __iomem *base = h_data->base; + u32 irqs_mask; + + stm32_bank = h_data->drv_data->exti_banks[bank_idx]; + chip_data = &h_data->chips_data[bank_idx]; + chip_data->host_data = h_data; + chip_data->reg_bank = stm32_bank; + + /* Determine number of irqs supported */ + writel_relaxed(~0UL, base + stm32_bank->rtsr_ofst); + irqs_mask = readl_relaxed(base + stm32_bank->rtsr_ofst); + + /* + * This IP has no reset, so after hot reboot we should + * clear registers to avoid residue + */ + writel_relaxed(0, base + stm32_bank->imr_ofst); + writel_relaxed(0, base + stm32_bank->emr_ofst); + writel_relaxed(0, base + stm32_bank->rtsr_ofst); + writel_relaxed(0, base + stm32_bank->ftsr_ofst); + writel_relaxed(~0UL, base + stm32_bank->rpr_ofst); + if (stm32_bank->fpr_ofst != UNDEF_REG) + writel_relaxed(~0UL, base + stm32_bank->fpr_ofst); + + pr_info("%s: bank%d, External IRQs available:%#x\n", + node->full_name, bank_idx, irqs_mask); + + return chip_data; +} + +static int __init stm32_exti_init(const struct stm32_exti_drv_data *drv_data, + struct device_node *node) { + struct stm32_exti_host_data *host_data; unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; - int nr_irqs, nr_exti, ret, i; + int nr_irqs, ret, i; struct irq_chip_generic *gc; struct irq_domain *domain; - void *base; - base = of_iomap(node, 0); - if (!base) { - pr_err("%pOF: Unable to map registers\n", node); - return -ENOMEM; + host_data = stm32_exti_host_init(drv_data, node); + if (!host_data) { + ret = -ENOMEM; + goto out_free_mem; } - stm32_exti_data = kcalloc(bank_nr, sizeof(*stm32_exti_data), - GFP_KERNEL); - if (!stm32_exti_data) - return -ENOMEM; - - domain = irq_domain_add_linear(node, bank_nr * IRQS_PER_BANK, + domain = irq_domain_add_linear(node, drv_data->bank_nr * IRQS_PER_BANK, &irq_exti_domain_ops, NULL); if (!domain) { pr_err("%s: Could not register interrupt domain.\n", @@ -276,16 +352,16 @@ __init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks, goto out_free_domain; } - for (i = 0; i < bank_nr; i++) { - const struct stm32_exti_bank *stm32_bank = stm32_exti_banks[i]; - struct stm32_exti_chip_data *chip_data = &stm32_exti_data[i]; - u32 irqs_mask; + for (i = 0; i < drv_data->bank_nr; i++) { + const struct stm32_exti_bank *stm32_bank; + struct stm32_exti_chip_data *chip_data; - chip_data->reg_bank = stm32_bank; + stm32_bank = drv_data->exti_banks[i]; + chip_data = stm32_exti_chip_init(host_data, i, node); gc = irq_get_domain_generic_chip(domain, i * IRQS_PER_BANK); - gc->reg_base = base; + gc->reg_base = host_data->base; gc->chip_types->type = IRQ_TYPE_EDGE_BOTH; gc->chip_types->chip.irq_ack = stm32_irq_ack; gc->chip_types->chip.irq_mask = irq_gc_mask_clr_bit; @@ -298,26 +374,6 @@ __init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks, gc->chip_types->regs.mask = stm32_bank->imr_ofst; gc->private = (void *)chip_data; - - /* Determine number of irqs supported */ - writel_relaxed(~0UL, base + stm32_bank->rtsr_ofst); - irqs_mask = readl_relaxed(base + stm32_bank->rtsr_ofst); - nr_exti = fls(readl_relaxed(base + stm32_bank->rtsr_ofst)); - - /* - * This IP has no reset, so after hot reboot we should - * clear registers to avoid residue - */ - writel_relaxed(0, base + stm32_bank->imr_ofst); - writel_relaxed(0, base + stm32_bank->emr_ofst); - writel_relaxed(0, base + stm32_bank->rtsr_ofst); - writel_relaxed(0, base + stm32_bank->ftsr_ofst); - writel_relaxed(~0UL, base + stm32_bank->rpr_ofst); - if (stm32_bank->fpr_ofst != UNDEF_REG) - writel_relaxed(~0UL, base + stm32_bank->fpr_ofst); - - pr_info("%s: bank%d, External IRQs available:%#x\n", - node->full_name, i, irqs_mask); } nr_irqs = of_irq_count(node); @@ -333,16 +389,17 @@ __init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks, out_free_domain: irq_domain_remove(domain); out_unmap: - iounmap(base); - kfree(stm32_exti_data); + iounmap(host_data->base); +out_free_mem: + kfree(host_data->chips_data); + kfree(host_data); return ret; } static int __init stm32f4_exti_of_init(struct device_node *np, struct device_node *parent) { - return stm32_exti_init(stm32f4xx_exti_banks, - ARRAY_SIZE(stm32f4xx_exti_banks), np); + return stm32_exti_init(&stm32f4xx_drv_data, np); } IRQCHIP_DECLARE(stm32f4_exti, "st,stm32-exti", stm32f4_exti_of_init); @@ -350,8 +407,7 @@ IRQCHIP_DECLARE(stm32f4_exti, "st,stm32-exti", stm32f4_exti_of_init); static int __init stm32h7_exti_of_init(struct device_node *np, struct device_node *parent) { - return stm32_exti_init(stm32h7xx_exti_banks, - ARRAY_SIZE(stm32h7xx_exti_banks), np); + return stm32_exti_init(&stm32h7xx_drv_data, np); } IRQCHIP_DECLARE(stm32h7_exti, "st,stm32h7-exti", stm32h7_exti_of_init); 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