From 6c27ab892b97056fc317aba9feb006ef375a8af5 Mon Sep 17 00:00:00 2001 From: Rostislav Lisovy Date: Sun, 20 Mar 2011 14:50:07 +0100 Subject: [PATCH] MF624 UIO driver (krnel part only). Compilable version. Not tested. --- src/uio/{ => mf614}/kernel/Makefile | 0 src/uio/{ => mf614}/kernel/README | 0 src/uio/{ => mf614}/kernel/mf614.c | 0 .../userspace/test_application/Makefile | 0 .../userspace/test_application/main.c | 0 src/uio/mf624/kernel/Makefile | 17 ++ src/uio/mf624/kernel/mf624.c | 217 ++++++++++++++++++ 7 files changed, 234 insertions(+) rename src/uio/{ => mf614}/kernel/Makefile (100%) rename src/uio/{ => mf614}/kernel/README (100%) rename src/uio/{ => mf614}/kernel/mf614.c (100%) rename src/uio/{ => mf614}/userspace/test_application/Makefile (100%) rename src/uio/{ => mf614}/userspace/test_application/main.c (100%) create mode 100644 src/uio/mf624/kernel/Makefile create mode 100755 src/uio/mf624/kernel/mf624.c diff --git a/src/uio/kernel/Makefile b/src/uio/mf614/kernel/Makefile similarity index 100% rename from src/uio/kernel/Makefile rename to src/uio/mf614/kernel/Makefile diff --git a/src/uio/kernel/README b/src/uio/mf614/kernel/README similarity index 100% rename from src/uio/kernel/README rename to src/uio/mf614/kernel/README diff --git a/src/uio/kernel/mf614.c b/src/uio/mf614/kernel/mf614.c similarity index 100% rename from src/uio/kernel/mf614.c rename to src/uio/mf614/kernel/mf614.c diff --git a/src/uio/userspace/test_application/Makefile b/src/uio/mf614/userspace/test_application/Makefile similarity index 100% rename from src/uio/userspace/test_application/Makefile rename to src/uio/mf614/userspace/test_application/Makefile diff --git a/src/uio/userspace/test_application/main.c b/src/uio/mf614/userspace/test_application/main.c similarity index 100% rename from src/uio/userspace/test_application/main.c rename to src/uio/mf614/userspace/test_application/main.c diff --git a/src/uio/mf624/kernel/Makefile b/src/uio/mf624/kernel/Makefile new file mode 100644 index 0000000..b9620eb --- /dev/null +++ b/src/uio/mf624/kernel/Makefile @@ -0,0 +1,17 @@ +MY_KERNEL_VERSION=$(shell uname -r) +MY_KERNEL_BUILD=/lib/modules/$(MY_KERNEL_VERSION)/build + +my_all: + make -C $(MY_KERNEL_BUILD) M=`pwd` modules + +obj-m := mf624.o + +clean: + rm *.ko *.o + +load: + sync + rmmod mf624 + sync + insmod ./mf624.ko + diff --git a/src/uio/mf624/kernel/mf624.c b/src/uio/mf624/kernel/mf624.c new file mode 100755 index 0000000..a275db5 --- /dev/null +++ b/src/uio/mf624/kernel/mf624.c @@ -0,0 +1,217 @@ +#include +#include +#include +#include +#include +#include +#include +#include + +#define PCI_VENDOR_ID_HUMUSOFT 0x186c +#define PCI_DEVICE_ID_MF624 0x0624 +#define PCI_SUBVENDOR_ID_HUMUSOFT 0x186c +#define PCI_SUBDEVICE_DEVICE 0x0000 + +#define INTCSR 0x4C +#define INTCSR_ADINT_ENABLE (1 << 0) +#define INTCSR_CTR4INT_ENABLE (1 << 3) +#define INTCSR_PCIINT_ENABLE (1 << 6) +#define INTCSR_ADINT_STATUS (1 << 2) +#define INTCSR_CTR4INT_STATUS (1 << 5) + + +typedef enum {ADC, CTR4, ALL} mf624_interrupt_source_t; + +void mf624_disable_interrupt(mf624_interrupt_source_t source, struct uio_info *info) +{ + u32 *INTCSR_reg = ((u32*) info->mem[0].internal_addr) + INTCSR; + + switch (source) { + case ADC: + *INTCSR_reg &= ~(INTCSR_ADINT_ENABLE); + break; + case CTR4: + *INTCSR_reg &= ~(INTCSR_CTR4INT_ENABLE); + break; + case ALL: + *INTCSR_reg &= ~(INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE); + break; + default: + *INTCSR_reg &= ~(INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE); + break; + } +} + +void mf624_enable_interrupt(mf624_interrupt_source_t source, struct uio_info *info) +{ + u32 *INTCSR_reg = ((u32*) info->mem[0].internal_addr) + INTCSR; + + switch (source) { + case ADC: + *INTCSR_reg |= (INTCSR_ADINT_ENABLE); + break; + case CTR4: + *INTCSR_reg |= (INTCSR_CTR4INT_ENABLE); + break; + case ALL: + *INTCSR_reg |= (INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE); + break; + default: + *INTCSR_reg |= (INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE); + break; + } +} + +static irqreturn_t mf624_irq_handler(int irq, struct uio_info *info) +{ + u32 *INTCSR_reg = ((u32*) info->mem[0].internal_addr) + INTCSR; + + if ((*INTCSR_reg & INTCSR_ADINT_ENABLE) && (*INTCSR_reg & INTCSR_ADINT_STATUS)) + { + //disable interrupt + mf624_disable_interrupt(ADC, info); + return IRQ_HANDLED; + } + + if ((*INTCSR_reg & INTCSR_CTR4INT_ENABLE) && (*INTCSR_reg & INTCSR_CTR4INT_STATUS)) + { + //disable interrupt + mf624_disable_interrupt(CTR4, info); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static int mf624_irqcontrol(struct uio_info *info, s32 irq_on) +{ + if (irq_on == 0) { /* Disable interrupts */ + mf624_disable_interrupt(ALL, info); + } + else if (irq_on == 1) { + mf624_enable_interrupt(ALL, info); + } + + return 0; +} + +static int __devinit mf624_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + struct uio_info *info; + + info = kzalloc(sizeof(struct uio_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + if (pci_enable_device(dev)) + goto out_free; + + if (pci_request_regions(dev, "mf624")) + goto out_disable; + + info->name = "MF624"; + info->version = "0.0.1"; + + + info->mem[0].name = "PCI chipset, interrupts, status bits, special functions"; + info->mem[0].addr = pci_resource_start(dev, 0); + if (!info->mem[0].addr) + goto out_release; + info->mem[0].size = pci_resource_len(dev, 0); + info->mem[0].memtype = UIO_MEM_PHYS; + info->mem[0].internal_addr = pci_ioremap_bar(dev, 0); + if (!info->mem[0].internal_addr) + goto out_release; + + + info->mem[1].name = "ADC, DAC, DIO"; + info->mem[1].addr = pci_resource_start(dev, 1); + if (!info->mem[1].addr) + goto out_release; + info->mem[1].size = pci_resource_len(dev, 1); + info->mem[1].memtype = UIO_MEM_PHYS; + info->mem[1].internal_addr = pci_ioremap_bar(dev, 1); + if (!info->mem[1].internal_addr) + goto out_release; + + + info->mem[2].name = "Counter/timer chip"; + info->mem[2].addr = pci_resource_start(dev, 2); + if (!info->mem[2].addr) + goto out_release; + info->mem[2].size = pci_resource_len(dev, 2); + info->mem[2].memtype = UIO_MEM_PHYS; + info->mem[2].internal_addr = pci_ioremap_bar(dev, 2); + if (!info->mem[2].internal_addr) + goto out_release; + + + info->irq = dev->irq; + info->irq_flags = IRQF_SHARED; + info->handler = mf624_irq_handler; + + info->irqcontrol = mf624_irqcontrol; + + if(uio_register_device(&dev->dev, info)) + goto out_release; + + pci_set_drvdata(dev, info); + + return 0; + +out_release: + pci_release_regions(dev); +out_disable: + pci_disable_device(dev); +out_free: + kfree(info); + return -ENODEV; +} + +static void mf624_pci_remove(struct pci_dev *dev) +{ + struct uio_info *info = pci_get_drvdata(dev); + + mf624_disable_interrupt(ALL, info); + + uio_unregister_device(info); + pci_release_regions(dev); + pci_disable_device(dev); + pci_set_drvdata(dev, NULL); + + kfree(info); +} + +static struct pci_device_id mf624_pci_id[] __devinitdata = { + { + .vendor = PCI_VENDOR_ID_HUMUSOFT, + .device = PCI_DEVICE_ID_MF624, + .subvendor = PCI_SUBVENDOR_ID_HUMUSOFT, + .subdevice = PCI_SUBDEVICE_DEVICE, + }, + { 0, } +}; + +static struct pci_driver mf624_pci_driver = { + .name = "mf624", + .id_table = mf624_pci_id, + .probe = mf624_pci_probe, + .remove = mf624_pci_remove, +}; + +static int __init mf624_init_module(void) +{ + return pci_register_driver(&mf624_pci_driver); +} + +static void __exit mf624_exit_module(void) +{ + pci_unregister_driver(&mf624_pci_driver); +} + +module_init(mf624_init_module); +module_exit(mf624_exit_module); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Rostislav Lisovy "); -- 2.39.2