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@ -21,6 +21,7 @@
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#include <linux/kernel.h>
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#include <linux/compiler.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/dma-mapping.h>
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#include <linux/serial_core.h>
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@ -864,7 +865,6 @@ static struct map_desc laguna_io_desc[] __initdata = {
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static void __init laguna_map_io(void)
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{
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cns3xxx_map_io();
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cns3xxx_pcie_iotable_init();
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iotable_init(ARRAY_AND_SIZE(laguna_io_desc));
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laguna_early_serial_setup();
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}
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@ -888,14 +888,46 @@ static int laguna_register_gpio(struct gpio *array, size_t num)
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return ret;
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}
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static int __init laguna_pcie_init(void)
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/* allow disabling of external isolated PCIe IRQs */
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static int cns3xxx_pciextirq = 1;
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static int __init cns3xxx_pciextirq_disable(char *s)
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{
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cns3xxx_pciextirq = 0;
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return 1;
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}
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__setup("noextirq", cns3xxx_pciextirq_disable);
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static int __init laguna_pcie_init_irq(void)
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{
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u32 __iomem *mem = (void __iomem *)(CNS3XXX_GPIOB_BASE_VIRT + 0x0004);
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u32 reg = (__raw_readl(mem) >> 26) & 0xf;
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int irqs[] = {
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IRQ_CNS3XXX_EXTERNAL_PIN0,
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IRQ_CNS3XXX_EXTERNAL_PIN1,
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IRQ_CNS3XXX_EXTERNAL_PIN2,
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154,
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};
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if (!machine_is_gw2388())
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return 0;
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return cns3xxx_pcie_init();
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/* Verify GPIOB[26:29] == 0001b indicating support for ext irqs */
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if (cns3xxx_pciextirq && reg != 1)
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cns3xxx_pciextirq = 0;
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if (cns3xxx_pciextirq) {
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printk("laguna: using isolated PCI interrupts:"
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" irq%d/irq%d/irq%d/irq%d\n",
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irqs[0], irqs[1], irqs[2], irqs[3]);
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cns3xxx_pcie_set_irqs(0, irqs);
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} else {
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printk("laguna: using shared PCI interrupts: irq%d\n",
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IRQ_CNS3XXX_PCIE0_DEVICE);
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}
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return 0;
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}
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subsys_initcall(laguna_pcie_init);
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subsys_initcall(laguna_pcie_init_irq);
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static int __init laguna_model_setup(void)
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{
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@ -908,8 +940,33 @@ static int __init laguna_model_setup(void)
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printk("Running on Gateworks Laguna %s\n", laguna_info.model);
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cns3xxx_gpio_init( 0, 32, CNS3XXX_GPIOA_BASE_VIRT, IRQ_CNS3XXX_GPIOA,
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NR_IRQS_CNS3XXX);
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cns3xxx_gpio_init(32, 32, CNS3XXX_GPIOB_BASE_VIRT, IRQ_CNS3XXX_GPIOB,
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NR_IRQS_CNS3XXX + 32);
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/*
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* If pcie external interrupts are supported and desired
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* configure IRQ types and configure pin function.
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* Note that cns3xxx_pciextirq is enabled by default, but can be
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* unset via the 'noextirq' kernel param or by laguna_pcie_init() if
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* the baseboard model does not support this hardware feature.
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*/
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if (cns3xxx_pciextirq) {
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mem = (void __iomem *)(CNS3XXX_MISC_BASE_VIRT + 0x0018);
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reg = __raw_readl(mem);
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/* GPIO26 is gpio, EXT_INT[0:2] not gpio func */
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reg &= ~0x3c000000;
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reg |= 0x38000000;
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__raw_writel(reg, mem);
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cns3xxx_gpio_init(32, 32, CNS3XXX_GPIOB_BASE_VIRT,
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IRQ_CNS3XXX_GPIOB, NR_IRQS_CNS3XXX + 32);
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irq_set_irq_type(154, IRQ_TYPE_LEVEL_LOW);
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irq_set_irq_type(93, IRQ_TYPE_LEVEL_HIGH);
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irq_set_irq_type(94, IRQ_TYPE_LEVEL_HIGH);
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irq_set_irq_type(95, IRQ_TYPE_LEVEL_HIGH);
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} else {
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cns3xxx_gpio_init(32, 32, CNS3XXX_GPIOB_BASE_VIRT,
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IRQ_CNS3XXX_GPIOB, NR_IRQS_CNS3XXX + 32);
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}
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if (strncmp(laguna_info.model, "GW", 2) == 0) {
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if (laguna_info.config_bitmap & ETH0_LOAD)
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@ -1099,5 +1156,6 @@ MACHINE_START(GW2388, "Gateworks Corporation Laguna Platform")
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.init_irq = cns3xxx_init_irq,
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.init_time = cns3xxx_timer_init,
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.init_machine = laguna_init,
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.init_late = cns3xxx_pcie_init_late,
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.restart = cns3xxx_restart,
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MACHINE_END
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