diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0140-irqchip-bcm2835-Add-FIQ-support.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0140-irqchip-bcm2835-Add-FIQ-support.patch | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0140-irqchip-bcm2835-Add-FIQ-support.patch b/target/linux/brcm2708/patches-4.1/0140-irqchip-bcm2835-Add-FIQ-support.patch deleted file mode 100644 index cf76fa4974..0000000000 --- a/target/linux/brcm2708/patches-4.1/0140-irqchip-bcm2835-Add-FIQ-support.patch +++ /dev/null @@ -1,130 +0,0 @@ -From 05ce49684b2546d9d9b785ffec16a202532d10c0 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org> -Date: Fri, 12 Jun 2015 19:01:05 +0200 -Subject: [PATCH 140/222] irqchip: bcm2835: Add FIQ support -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Add a duplicate irq range with an offset on the hwirq's so the -driver can detect that enable_fiq() is used. -Tested with downstream dwc_otg USB controller driver. - -Signed-off-by: Noralf Trønnes <noralf@tronnes.org> -Reviewed-by: Eric Anholt <eric@anholt.net> -Acked-by: Stephen Warren <swarren@wwwdotorg.org> ---- - arch/arm/mach-bcm/Kconfig | 1 + - drivers/irqchip/irq-bcm2835.c | 53 ++++++++++++++++++++++++++++++++++++++----- - 2 files changed, 48 insertions(+), 6 deletions(-) - ---- a/arch/arm/mach-bcm/Kconfig -+++ b/arch/arm/mach-bcm/Kconfig -@@ -114,6 +114,7 @@ config ARCH_BCM2835 - select ARM_ERRATA_411920 - select ARM_TIMER_SP804 - select CLKSRC_OF -+ select FIQ - select PINCTRL - select PINCTRL_BCM2835 - help ---- a/drivers/irqchip/irq-bcm2835.c -+++ b/drivers/irqchip/irq-bcm2835.c -@@ -56,7 +56,7 @@ - #include "irqchip.h" - - /* Put the bank and irq (32 bits) into the hwirq */ --#define MAKE_HWIRQ(b, n) ((b << 5) | (n)) -+#define MAKE_HWIRQ(b, n) (((b) << 5) | (n)) - #define HWIRQ_BANK(i) (i >> 5) - #define HWIRQ_BIT(i) BIT(i & 0x1f) - -@@ -72,9 +72,13 @@ - | SHORTCUT1_MASK | SHORTCUT2_MASK) - - #define REG_FIQ_CONTROL 0x0c -+#define REG_FIQ_ENABLE 0x80 -+#define REG_FIQ_DISABLE 0 - - #define NR_BANKS 3 - #define IRQS_PER_BANK 32 -+#define NUMBER_IRQS MAKE_HWIRQ(NR_BANKS, 0) -+#define FIQ_START (NR_IRQS_BANK0 + MAKE_HWIRQ(NR_BANKS - 1, 0)) - - static int reg_pending[] __initconst = { 0x00, 0x04, 0x08 }; - static int reg_enable[] __initconst = { 0x18, 0x10, 0x14 }; -@@ -98,14 +102,38 @@ static struct armctrl_ic intc __read_mos - static void __exception_irq_entry bcm2835_handle_irq( - struct pt_regs *regs); - -+static inline unsigned int hwirq_to_fiq(unsigned long hwirq) -+{ -+ hwirq -= NUMBER_IRQS; -+ /* -+ * The hwirq numbering used in this driver is: -+ * BASE (0-7) GPU1 (32-63) GPU2 (64-95). -+ * This differ from the one used in the FIQ register: -+ * GPU1 (0-31) GPU2 (32-63) BASE (64-71) -+ */ -+ if (hwirq >= 32) -+ return hwirq - 32; -+ -+ return hwirq + 64; -+} -+ - static void armctrl_mask_irq(struct irq_data *d) - { -- writel_relaxed(HWIRQ_BIT(d->hwirq), intc.disable[HWIRQ_BANK(d->hwirq)]); -+ if (d->hwirq >= NUMBER_IRQS) -+ writel_relaxed(REG_FIQ_DISABLE, intc.base + REG_FIQ_CONTROL); -+ else -+ writel_relaxed(HWIRQ_BIT(d->hwirq), -+ intc.disable[HWIRQ_BANK(d->hwirq)]); - } - - static void armctrl_unmask_irq(struct irq_data *d) - { -- writel_relaxed(HWIRQ_BIT(d->hwirq), intc.enable[HWIRQ_BANK(d->hwirq)]); -+ if (d->hwirq >= NUMBER_IRQS) -+ writel_relaxed(REG_FIQ_ENABLE | hwirq_to_fiq(d->hwirq), -+ intc.base + REG_FIQ_CONTROL); -+ else -+ writel_relaxed(HWIRQ_BIT(d->hwirq), -+ intc.enable[HWIRQ_BANK(d->hwirq)]); - } - - static struct irq_chip armctrl_chip = { -@@ -150,8 +178,9 @@ static int __init armctrl_of_init(struct - panic("%s: unable to map IC registers\n", - node->full_name); - -- intc.domain = irq_domain_add_linear(node, MAKE_HWIRQ(NR_BANKS, 0), -- &armctrl_ops, NULL); -+ intc.base = base; -+ intc.domain = irq_domain_add_linear(node, NUMBER_IRQS * 2, -+ &armctrl_ops, NULL); - if (!intc.domain) - panic("%s: unable to create IRQ domain\n", node->full_name); - -@@ -168,8 +197,20 @@ static int __init armctrl_of_init(struct - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - } - } -- - set_handle_irq(bcm2835_handle_irq); -+ -+ /* Make a duplicate irq range which is used to enable FIQ */ -+ for (b = 0; b < NR_BANKS; b++) { -+ for (i = 0; i < bank_irqs[b]; i++) { -+ irq = irq_create_mapping(intc.domain, -+ MAKE_HWIRQ(b, i) + NUMBER_IRQS); -+ BUG_ON(irq <= 0); -+ irq_set_chip(irq, &armctrl_chip); -+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); -+ } -+ } -+ init_FIQ(FIQ_START); -+ - return 0; - } - |