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This change makes the names of Broadcom targets consistent by using the common notation based on SoC/CPU ID (which is used internally anyway), bcmXXXX instead of brcmXXXX. This is even used for target TITLE in make menuconfig already, only the short target name used brcm so far. Despite, since subtargets range from bcm2708 to bcm2711, it seems appropriate to use bcm27xx instead of bcm2708 (again, as already done for BOARDNAME). This also renames the packages brcm2708-userland and brcm2708-gpu-fw. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
128 lines
3.9 KiB
Diff
128 lines
3.9 KiB
Diff
From 9334b65d3020bca44aa2695b84eda865ecc340e2 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Fri, 12 Jun 2015 19:01:05 +0200
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Subject: [PATCH] irqchip: bcm2835: Add FIQ support
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Add a duplicate irq range with an offset on the hwirq's so the
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driver can detect that enable_fiq() is used.
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Tested with downstream dwc_otg USB controller driver.
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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Reviewed-by: Eric Anholt <eric@anholt.net>
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Acked-by: Stephen Warren <swarren@wwwdotorg.org>
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---
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arch/arm/mach-bcm/Kconfig | 1 +
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drivers/irqchip/irq-bcm2835.c | 51 +++++++++++++++++++++++++++++++----
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2 files changed, 47 insertions(+), 5 deletions(-)
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--- a/arch/arm/mach-bcm/Kconfig
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+++ b/arch/arm/mach-bcm/Kconfig
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@@ -165,6 +165,7 @@ config ARCH_BCM2835
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select HAVE_ARM_ARCH_TIMER if ARCH_MULTI_V7
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select TIMER_OF
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select BCM2835_TIMER
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+ select FIQ
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select PINCTRL
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select PINCTRL_BCM2835
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help
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--- a/drivers/irqchip/irq-bcm2835.c
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+++ b/drivers/irqchip/irq-bcm2835.c
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@@ -54,7 +54,7 @@
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#include <asm/exception.h>
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/* Put the bank and irq (32 bits) into the hwirq */
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-#define MAKE_HWIRQ(b, n) ((b << 5) | (n))
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+#define MAKE_HWIRQ(b, n) (((b) << 5) | (n))
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#define HWIRQ_BANK(i) (i >> 5)
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#define HWIRQ_BIT(i) BIT(i & 0x1f)
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@@ -70,9 +70,13 @@
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| SHORTCUT1_MASK | SHORTCUT2_MASK)
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#define REG_FIQ_CONTROL 0x0c
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+#define REG_FIQ_ENABLE 0x80
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+#define REG_FIQ_DISABLE 0
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#define NR_BANKS 3
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#define IRQS_PER_BANK 32
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+#define NUMBER_IRQS MAKE_HWIRQ(NR_BANKS, 0)
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+#define FIQ_START (NR_IRQS_BANK0 + MAKE_HWIRQ(NR_BANKS - 1, 0))
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static const int reg_pending[] __initconst = { 0x00, 0x04, 0x08 };
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static const int reg_enable[] __initconst = { 0x18, 0x10, 0x14 };
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@@ -97,14 +101,38 @@ static void __exception_irq_entry bcm283
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struct pt_regs *regs);
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static void bcm2836_chained_handle_irq(struct irq_desc *desc);
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+static inline unsigned int hwirq_to_fiq(unsigned long hwirq)
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+{
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+ hwirq -= NUMBER_IRQS;
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+ /*
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+ * The hwirq numbering used in this driver is:
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+ * BASE (0-7) GPU1 (32-63) GPU2 (64-95).
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+ * This differ from the one used in the FIQ register:
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+ * GPU1 (0-31) GPU2 (32-63) BASE (64-71)
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+ */
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+ if (hwirq >= 32)
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+ return hwirq - 32;
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+
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+ return hwirq + 64;
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+}
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+
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static void armctrl_mask_irq(struct irq_data *d)
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{
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- writel_relaxed(HWIRQ_BIT(d->hwirq), intc.disable[HWIRQ_BANK(d->hwirq)]);
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+ if (d->hwirq >= NUMBER_IRQS)
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+ writel_relaxed(REG_FIQ_DISABLE, intc.base + REG_FIQ_CONTROL);
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+ else
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+ writel_relaxed(HWIRQ_BIT(d->hwirq),
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+ intc.disable[HWIRQ_BANK(d->hwirq)]);
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}
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static void armctrl_unmask_irq(struct irq_data *d)
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{
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- writel_relaxed(HWIRQ_BIT(d->hwirq), intc.enable[HWIRQ_BANK(d->hwirq)]);
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+ if (d->hwirq >= NUMBER_IRQS)
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+ writel_relaxed(REG_FIQ_ENABLE | hwirq_to_fiq(d->hwirq),
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+ intc.base + REG_FIQ_CONTROL);
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+ else
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+ writel_relaxed(HWIRQ_BIT(d->hwirq),
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+ intc.enable[HWIRQ_BANK(d->hwirq)]);
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}
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static struct irq_chip armctrl_chip = {
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@@ -149,8 +177,9 @@ static int __init armctrl_of_init(struct
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if (!base)
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panic("%pOF: unable to map IC registers\n", node);
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- intc.domain = irq_domain_add_linear(node, MAKE_HWIRQ(NR_BANKS, 0),
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- &armctrl_ops, NULL);
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+ intc.base = base;
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+ intc.domain = irq_domain_add_linear(node, NUMBER_IRQS * 2,
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+ &armctrl_ops, NULL);
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if (!intc.domain)
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panic("%pOF: unable to create IRQ domain\n", node);
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@@ -180,6 +209,18 @@ static int __init armctrl_of_init(struct
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set_handle_irq(bcm2835_handle_irq);
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}
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+ /* Make a duplicate irq range which is used to enable FIQ */
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+ for (b = 0; b < NR_BANKS; b++) {
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+ for (i = 0; i < bank_irqs[b]; i++) {
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+ irq = irq_create_mapping(intc.domain,
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+ MAKE_HWIRQ(b, i) + NUMBER_IRQS);
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+ BUG_ON(irq <= 0);
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+ irq_set_chip(irq, &armctrl_chip);
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+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
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+ }
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+ }
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+ init_FIQ(FIQ_START);
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+
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return 0;
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}
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