diff options
Diffstat (limited to 'arch/arm/mach-tegra/pcie.c')
| -rw-r--r-- | arch/arm/mach-tegra/pcie.c | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c index 80a9a121f193..68e0fda385ae 100644 --- a/arch/arm/mach-tegra/pcie.c +++ b/arch/arm/mach-tegra/pcie.c @@ -36,6 +36,8 @@ #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> +#include <linux/workqueue.h> +#include <linux/gpio.h> #include <asm/sizes.h> #include <asm/mach/pci.h> @@ -308,6 +310,7 @@ struct tegra_pcie_port { char mem_space_name[16]; char prefetch_space_name[20]; struct resource res[3]; + struct pci_bus* bus; }; struct tegra_pcie_info { @@ -319,6 +322,7 @@ struct tegra_pcie_info { struct resource res_mmio; int power_rails_enabled; int pcie_power_enabled; + struct work_struct hotplug_detect; struct regulator *regulator_hvdd; struct regulator *regulator_pexio; @@ -333,8 +337,6 @@ struct tegra_pcie_info { #define pmc_readl(reg) \ __raw_readl((u32)reg_pmc_base + (reg)) -static void __iomem *reg_pmc_base = IO_ADDRESS(TEGRA_PMC_BASE); - static struct tegra_pcie_info tegra_pcie = { .res_mmio = { .name = "PCI IO", @@ -620,6 +622,31 @@ static struct hw_pci tegra_pcie_hw = { .map_irq = tegra_pcie_map_irq, }; +static void work_hotplug_handler(struct work_struct *work) +{ + struct tegra_pcie_info *pcie_driver = + container_of(work, struct tegra_pcie_info, hotplug_detect); + int val; + + if (pcie_driver->plat_data->gpio == -1) + return; + val = gpio_get_value(pcie_driver->plat_data->gpio); + if (val == 0) { + pr_info("Pcie Dock Connected but hotplug functionality not supported yet\n"); + } else { + struct pci_dev *dev = NULL; + + pr_info("Pcie Dock DisConnected\n"); + for_each_pci_dev(dev) + pci_stop_bus_device(dev); + } +} + +static irqreturn_t gpio_pcie_detect_isr(int irq, void *arg) +{ + schedule_work(&tegra_pcie.hotplug_detect); + return IRQ_HANDLED; +} static irqreturn_t tegra_pcie_isr(int irq, void *arg) { @@ -1169,6 +1196,8 @@ static int tegra_pcie_init(void) pcibios_min_mem = 0x03000000ul; pcibios_min_io = 0x10000000ul; #endif + + INIT_WORK(&tegra_pcie.hotplug_detect, work_hotplug_handler); err = tegra_pcie_get_resources(); if (err) return err; @@ -1184,11 +1213,36 @@ static int tegra_pcie_init(void) } tegra_pcie.pcie_power_enabled = 1; + if (tegra_pcie.plat_data->use_dock_detect) { + unsigned int irq; + + pr_info("acquiring dock_detect = %d\n", + tegra_pcie.plat_data->gpio); + gpio_request(tegra_pcie.plat_data->gpio, "pcie_dock_detect"); + gpio_direction_input(tegra_pcie.plat_data->gpio); + irq = gpio_to_irq(tegra_pcie.plat_data->gpio); + if (irq < 0) { + pr_err("Unable to get irq number for dock_detect\n"); + goto err_irq; + } + err = request_irq(irq, + gpio_pcie_detect_isr, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "pcie_dock_detect", + (void *)tegra_pcie.plat_data); + if (err < 0) { + pr_err("Unable to claim irq number for dock_detect\n"); + goto err_irq; + } + } + if (tegra_pcie.num_ports) pci_common_init(&tegra_pcie_hw); else err = tegra_pcie_power_off(); +err_irq: + return err; } |