new file mode 100644
@@ -0,0 +1,372 @@
+/*
+ * TM4C123 GPIO
+ *
+ * Copyright (c) 2023 Mohamed ElSayed <m.elsayed4420@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/gpio/tm4c123_gpio.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "hw/misc/tm4c123_sysctl.h"
+#include "qemu/bitops.h"
+#include "trace.h"
+
+#define LOG(fmt, args...) qemu_log("%s: " fmt, __func__, ## args)
+#define READONLY LOG("0x%"HWADDR_PRIx" is a readonly field\n.", addr)
+
+static bool gpio_clock_enabled(TM4C123SysCtlState *s, hwaddr addr)
+{
+ switch(addr) {
+ case GPIO_A:
+ return test_bit(0, (const unsigned long*)&s->sysctl_rcgcgpio);
+ break;
+ case GPIO_B:
+ return test_bit(1, (const unsigned long*)&s->sysctl_rcgcgpio);
+ break;
+ case GPIO_C:
+ return test_bit(2, (const unsigned long*)&s->sysctl_rcgcgpio);
+ break;
+ case GPIO_D:
+ return test_bit(3, (const unsigned long*)&s->sysctl_rcgcgpio);
+ break;
+ case GPIO_E:
+ return test_bit(4, (const unsigned long*)&s->sysctl_rcgcgpio);
+ break;
+ case GPIO_F:
+ return test_bit(5, (const unsigned long*)&s->sysctl_rcgcgpio);
+ break;
+ }
+ return false;
+}
+
+static void tm4c123_gpio_reset(DeviceState *dev)
+{
+ TM4C123GPIOState *s = TM4C123_GPIO(dev);
+
+ s->gpio_data = 0x00000000;
+ s->gpio_dir = 0x00000000;
+ s->gpio_is = 0x00000000;
+ s->gpio_ibe = 0x00000000;
+ s->gpio_iev = 0x00000000;
+ s->gpio_im = 0x00000000;
+ s->gpio_ris = 0x00000000;
+ s->gpio_mis = 0x00000000;
+ s->gpio_icr = 0x00000000;
+ s->gpio_afsel = 0x00000000;
+ s->gpio_dr2r = 0x000000FF;
+ s->gpio_dr4r = 0x00000000;
+ s->gpio_dr8r = 0x00000000;
+ s->gpio_odr = 0x00000000;
+ s->gpio_pur = 0x00000000;
+ s->gpio_pdr = 0x00000000;
+ s->gpio_slr = 0x00000000;
+ s->gpio_den = 0x00000000;
+ s->gpio_lock = 0x00000001;
+ s->gpio_ocr = 0x00000000;
+ s->gpio_amsel = 0x00000000;
+ s->gpio_pctl = 0x00000000;
+ s->gpio_adcctl = 0x00000000;
+ s->gpio_dmactl = 0x00000000;
+ s->gpio_per_id4 = 0x00000000;
+ s->gpio_per_id5 = 0x00000000;
+ s->gpio_per_id6 = 0x00000000;
+ s->gpio_per_id7 = 0x00000000;
+ s->gpio_per_id0 = 0x00000061;
+ s->gpio_per_id1 = 0x00000000;
+ s->gpio_per_id2 = 0x00000018;
+ s->gpio_per_id3 = 0x00000001;
+ s->gpio_pcell_id0 = 0x0000000D;
+ s->gpio_pcell_id1 = 0x000000F0;
+ s->gpio_pcell_id2 = 0x00000005;
+ s->gpio_pcell_id3 = 0x000000B1;
+}
+
+static void tm4c123_gpio_write(void *opaque, hwaddr addr, uint64_t val64, unsigned int size)
+{
+ TM4C123GPIOState *s = opaque;
+ uint32_t val32 = val64;
+
+ if (!gpio_clock_enabled(s->sysctl, s->mmio.addr)) {
+ hw_error("GPIO module clock is not enabled");
+ }
+ trace_tm4c123_gpio_write(addr, val32);
+
+ switch(addr) {
+ case GPIO_DATA:
+ {
+ uint32_t rising_edge = (val32 ^ s->gpio_data) & val32;
+ //level detection
+ s->gpio_mis = s->gpio_is & s->gpio_iev & val32;
+ s->gpio_mis |= s->gpio_is & ~(s->gpio_iev | val32);
+ s->gpio_mis &= s->gpio_im;
+
+ //edge detection
+ //both edges
+ s->gpio_mis |= (s->gpio_is | s->gpio_ibe) & (~s->gpio_is);
+ //rising edge
+ s->gpio_mis |= (~(s->gpio_is | s->gpio_ibe | s->gpio_iev)) & rising_edge;
+ //falling edge
+ s->gpio_mis |= ~(s->gpio_is | s->gpio_ibe | s->gpio_iev | rising_edge);
+ s->gpio_mis &= s->gpio_im;
+ s->gpio_ris |= s->gpio_mis & val32;
+
+ s->gpio_data = val32;
+ if (s->gpio_im != 0)
+ qemu_irq_pulse(s->irq);
+ }
+ break;
+ case GPIO_DIR:
+ s->gpio_dir = val32;
+ break;
+ case GPIO_IS:
+ s->gpio_is = val32;
+ break;
+ case GPIO_IBE:
+ s->gpio_ibe = val32;
+ break;
+ case GPIO_IEV:
+ s->gpio_iev = val32;
+ break;
+ case GPIO_IM:
+ s->gpio_im = val32;
+ break;
+ case GPIO_RIS:
+ s->gpio_ris = val32;
+ break;
+ case GPIO_MIS:
+ READONLY;
+ break;
+ case GPIO_ICR:
+ s->gpio_mis ^= val32;
+ s->gpio_ris ^= val32;
+ s->gpio_icr = val32;
+ break;
+ case GPIO_AFSEL:
+ s->gpio_afsel = val32;
+ break;
+ case GPIO_DR2R:
+ s->gpio_dr2r = val32;
+ break;
+ case GPIO_DR4R:
+ s->gpio_dr4r = val32;
+ break;
+ case GPIO_DR8R:
+ s->gpio_dr8r = val32;
+ break;
+ case GPIO_ODR:
+ s->gpio_odr = val32;
+ break;
+ case GPIO_PUR:
+ s->gpio_pur = val32;
+ break;
+ case GPIO_PDR:
+ s->gpio_pdr = val32;
+ break;
+ case GPIO_SLR:
+ s->gpio_slr = val32;
+ break;
+ case GPIO_DEN:
+ s->gpio_den = val32;
+ break;
+ case GPIO_LOCK:
+ s->gpio_lock = val32;
+ break;
+ case GPIO_OCR:
+ s->gpio_ocr = val32;
+ break;
+ case GPIO_AMSEL:
+ s->gpio_amsel = val32;
+ break;
+ case GPIO_PCTL:
+ s->gpio_pctl = val32;
+ break;
+ case GPIO_ADCCTL:
+ s->gpio_adcctl = val32;
+ break;
+ case GPIO_DMACTL:
+ s->gpio_dmactl = val32;
+ break;
+ case GPIO_PER_ID4:
+ READONLY;
+ break;
+ case GPIO_PER_ID5:
+ READONLY;
+ break;
+ case GPIO_PER_ID6:
+ READONLY;
+ break;
+ case GPIO_PER_ID7:
+ READONLY;
+ break;
+ case GPIO_PER_ID0:
+ READONLY;
+ break;
+ case GPIO_PER_ID1:
+ READONLY;
+ break;
+ case GPIO_PER_ID2:
+ READONLY;
+ break;
+ case GPIO_PER_ID3:
+ READONLY;
+ break;
+ case GPIO_PCELL_ID0:
+ READONLY;
+ break;
+ case GPIO_PCELL_ID1:
+ READONLY;
+ break;
+ case GPIO_PCELL_ID2:
+ READONLY;
+ break;
+ case GPIO_PCELL_ID3:
+ READONLY;
+ break;
+ default:
+ LOG("Bad address 0x%"HWADDR_PRIx"\n", addr);
+ }
+}
+
+static uint64_t tm4c123_gpio_read(void *opaque, hwaddr addr, unsigned int size)
+{
+ TM4C123GPIOState *s = opaque;
+
+ trace_tm4c123_gpio_read(addr);
+
+ if (!gpio_clock_enabled(s->sysctl, s->mmio.addr)) {
+ hw_error("GPIO module clock is not enabled");
+ }
+
+ switch(addr) {
+ case GPIO_DATA:
+ return s->gpio_data;
+ case GPIO_DIR:
+ return s->gpio_dir;
+ case GPIO_IS:
+ return s->gpio_is;
+ case GPIO_IBE:
+ return s->gpio_ibe;
+ case GPIO_IEV:
+ return s->gpio_iev;
+ case GPIO_IM:
+ return s->gpio_im;
+ case GPIO_RIS:
+ return s->gpio_ris;
+ case GPIO_MIS:
+ return s->gpio_mis;
+ case GPIO_ICR:
+ return s->gpio_icr;
+ case GPIO_AFSEL:
+ return s->gpio_afsel;
+ case GPIO_DR2R:
+ return s->gpio_dr2r;
+ case GPIO_DR4R:
+ return s->gpio_dr4r;
+ case GPIO_DR8R:
+ return s->gpio_dr8r;
+ case GPIO_ODR:
+ return s->gpio_odr;
+ case GPIO_PUR:
+ return s->gpio_pur;
+ case GPIO_PDR:
+ return s->gpio_pdr;
+ case GPIO_SLR:
+ return s->gpio_slr;
+ case GPIO_DEN:
+ return s->gpio_den;
+ case GPIO_LOCK:
+ return s->gpio_lock;
+ case GPIO_OCR:
+ return s->gpio_ocr;
+ case GPIO_AMSEL:
+ return s->gpio_amsel;
+ case GPIO_PCTL:
+ return s->gpio_pctl;
+ case GPIO_ADCCTL:
+ return s->gpio_adcctl;
+ case GPIO_DMACTL:
+ return s->gpio_dmactl;
+ case GPIO_PER_ID4:
+ return s->gpio_per_id4;
+ case GPIO_PER_ID5:
+ return s->gpio_per_id5;
+ case GPIO_PER_ID6:
+ return s->gpio_per_id6;
+ case GPIO_PER_ID7:
+ return s->gpio_per_id7;
+ case GPIO_PER_ID0:
+ return s->gpio_per_id0;
+ case GPIO_PER_ID1:
+ return s->gpio_per_id1;
+ case GPIO_PER_ID2:
+ return s->gpio_per_id2;
+ case GPIO_PER_ID3:
+ return s->gpio_per_id3;
+ case GPIO_PCELL_ID0:
+ return s->gpio_pcell_id0;
+ case GPIO_PCELL_ID1:
+ return s->gpio_pcell_id1;
+ case GPIO_PCELL_ID2:
+ return s->gpio_pcell_id2;
+ case GPIO_PCELL_ID3:
+ return s->gpio_pcell_id3;
+ default:
+ LOG("Bad address 0x%"HWADDR_PRIx"\n", addr);
+ }
+ return 0;
+}
+
+static const MemoryRegionOps tm4c123_gpio_ops = {
+ .read = tm4c123_gpio_read,
+ .write = tm4c123_gpio_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void tm4c123_gpio_init(Object *obj)
+{
+ TM4C123GPIOState *s = TM4C123_GPIO(obj);
+
+ sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
+ memory_region_init_io(&s->mmio, obj, &tm4c123_gpio_ops, s, TYPE_TM4C123_GPIO, 0xFFF);
+ sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
+}
+
+static void tm4c123_gpio_class_init(ObjectClass *kclass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(kclass);
+ dc->reset = tm4c123_gpio_reset;
+}
+
+static const TypeInfo tm4c123_gpio_info = {
+ .name = TYPE_TM4C123_GPIO,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(TM4C123GPIOState),
+ .instance_init = tm4c123_gpio_init,
+ .class_init = tm4c123_gpio_class_init,
+};
+
+static void tm4c123_gpio_register_types(void)
+{
+ type_register_static(&tm4c123_gpio_info);
+}
+
+type_init(tm4c123_gpio_register_types)
new file mode 100644
@@ -0,0 +1,127 @@
+/*
+ * TM4C123 GPIO
+ *
+ * Copyright (c) 2023 Mohamed ElSayed <m.elsayed4420@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_ARM_TM4C123_GPIO_H
+#define HW_ARM_TM4C123_GPIO_H
+
+#include "hw/sysbus.h"
+#include "hw/irq.h"
+#include "qom/object.h"
+#include "hw/misc/tm4c123_sysctl.h"
+
+/* #define GPIO_DATA 0x00 */
+#define GPIO_DATA 0x3FC
+#define GPIO_DIR 0x400
+#define GPIO_IS 0x404
+#define GPIO_IBE 0x408
+#define GPIO_IEV 0x40C
+#define GPIO_IM 0x410
+#define GPIO_RIS 0x414
+#define GPIO_MIS 0x418
+#define GPIO_ICR 0x41C
+#define GPIO_AFSEL 0x420
+#define GPIO_DR2R 0x500
+#define GPIO_DR4R 0x504
+#define GPIO_DR8R 0x508
+#define GPIO_ODR 0x50C
+#define GPIO_PUR 0x510
+#define GPIO_PDR 0x514
+#define GPIO_SLR 0x518
+#define GPIO_DEN 0x51C
+#define GPIO_LOCK 0x520
+#define GPIO_OCR 0x524
+#define GPIO_AMSEL 0x528
+#define GPIO_PCTL 0x52C
+#define GPIO_ADCCTL 0x530
+#define GPIO_DMACTL 0x534
+#define GPIO_PER_ID4 0xFD0
+#define GPIO_PER_ID5 0xFD4
+#define GPIO_PER_ID6 0xFD8
+#define GPIO_PER_ID7 0xFDC
+#define GPIO_PER_ID0 0XFE0
+#define GPIO_PER_ID1 0xFE4
+#define GPIO_PER_ID2 0xFE8
+#define GPIO_PER_ID3 0xFEC
+#define GPIO_PCELL_ID0 0xFF0
+#define GPIO_PCELL_ID1 0xFF4
+#define GPIO_PCELL_ID2 0xFF8
+#define GPIO_PCELL_ID3 0xFFC
+
+#define GPIO_A 0x40004000
+#define GPIO_B 0x40005000
+#define GPIO_C 0x40006000
+#define GPIO_D 0x40007000
+#define GPIO_E 0x40024000
+#define GPIO_F 0x40025000
+
+#define TYPE_TM4C123_GPIO "tm4c123-gpio"
+
+OBJECT_DECLARE_SIMPLE_TYPE(TM4C123GPIOState, TM4C123_GPIO)
+
+struct TM4C123GPIOState {
+ SysBusDevice parent_obj;
+ MemoryRegion mmio;
+
+ uint32_t gpio_data;
+ uint32_t gpio_dir;
+ uint32_t gpio_is;
+ uint32_t gpio_ibe;
+ uint32_t gpio_iev;
+ uint32_t gpio_im;
+ uint32_t gpio_ris;
+ uint32_t gpio_mis;
+ uint32_t gpio_icr;
+ uint32_t gpio_afsel;
+ uint32_t gpio_dr2r;
+ uint32_t gpio_dr4r;
+ uint32_t gpio_dr8r;
+ uint32_t gpio_odr;
+ uint32_t gpio_pur;
+ uint32_t gpio_pdr;
+ uint32_t gpio_slr;
+ uint32_t gpio_den;
+ uint32_t gpio_lock;
+ uint32_t gpio_ocr;
+ uint32_t gpio_amsel;
+ uint32_t gpio_pctl;
+ uint32_t gpio_adcctl;
+ uint32_t gpio_dmactl;
+ uint32_t gpio_per_id4;
+ uint32_t gpio_per_id5;
+ uint32_t gpio_per_id6;
+ uint32_t gpio_per_id7;
+ uint32_t gpio_per_id0;
+ uint32_t gpio_per_id1;
+ uint32_t gpio_per_id2;
+ uint32_t gpio_per_id3;
+ uint32_t gpio_pcell_id0;
+ uint32_t gpio_pcell_id1;
+ uint32_t gpio_pcell_id2;
+ uint32_t gpio_pcell_id3;
+
+ qemu_irq irq;
+ TM4C123SysCtlState *sysctl;
+};
+
+#endif
Signed-off-by: Mohamed ElSayed <m.elsayed4420@gmail.com> --- hw/gpio/tm4c123_gpio.c | 372 +++++++++++++++++++++++++++++++++ include/hw/gpio/tm4c123_gpio.h | 127 +++++++++++ 2 files changed, 499 insertions(+) create mode 100644 hw/gpio/tm4c123_gpio.c create mode 100644 include/hw/gpio/tm4c123_gpio.h