diff options
| -rw-r--r-- | hw/gpio/Makefile.objs | 1 | ||||
| -rw-r--r-- | hw/gpio/aspeed_gpio.c | 884 | ||||
| -rw-r--r-- | include/hw/gpio/aspeed_gpio.h | 100 |
3 files changed, 985 insertions, 0 deletions
diff --git a/hw/gpio/Makefile.objs b/hw/gpio/Makefile.objs index e5da0cb54f..d305b3b24b 100644 --- a/hw/gpio/Makefile.objs +++ b/hw/gpio/Makefile.objs @@ -9,3 +9,4 @@ obj-$(CONFIG_OMAP) += omap_gpio.o obj-$(CONFIG_IMX) += imx_gpio.o obj-$(CONFIG_RASPI) += bcm2835_gpio.o obj-$(CONFIG_NRF51_SOC) += nrf51_gpio.o +obj-$(CONFIG_ASPEED_SOC) += aspeed_gpio.o diff --git a/hw/gpio/aspeed_gpio.c b/hw/gpio/aspeed_gpio.c new file mode 100644 index 0000000000..25fbfec3b8 --- /dev/null +++ b/hw/gpio/aspeed_gpio.c @@ -0,0 +1,884 @@ +/* + * ASPEED GPIO Controller + * + * Copyright (C) 2017-2019 IBM Corp. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include <assert.h> + +#include "qemu/osdep.h" +#include "qemu/host-utils.h" +#include "qemu/log.h" +#include "hw/gpio/aspeed_gpio.h" +#include "include/hw/misc/aspeed_scu.h" +#include "qapi/error.h" +#include "qapi/visitor.h" +#include "hw/irq.h" +#include "migration/vmstate.h" + +#define GPIOS_PER_REG 32 +#define GPIOS_PER_SET GPIOS_PER_REG +#define GPIO_PIN_GAP_SIZE 4 +#define GPIOS_PER_GROUP 8 +#define GPIO_GROUP_SHIFT 3 + +/* GPIO Source Types */ +#define ASPEED_CMD_SRC_MASK 0x01010101 +#define ASPEED_SOURCE_ARM 0 +#define ASPEED_SOURCE_LPC 1 +#define ASPEED_SOURCE_COPROCESSOR 2 +#define ASPEED_SOURCE_RESERVED 3 + +/* GPIO Interrupt Triggers */ +/* + * For each set of gpios there are three sensitivity registers that control + * the interrupt trigger mode. + * + * | 2 | 1 | 0 | trigger mode + * ----------------------------- + * | 0 | 0 | 0 | falling-edge + * | 0 | 0 | 1 | rising-edge + * | 0 | 1 | 0 | level-low + * | 0 | 1 | 1 | level-high + * | 1 | X | X | dual-edge + */ +#define ASPEED_FALLING_EDGE 0 +#define ASPEED_RISING_EDGE 1 +#define ASPEED_LEVEL_LOW 2 +#define ASPEED_LEVEL_HIGH 3 +#define ASPEED_DUAL_EDGE 4 + +/* GPIO Register Address Offsets */ +#define GPIO_ABCD_DATA_VALUE (0x000 >> 2) +#define GPIO_ABCD_DIRECTION (0x004 >> 2) +#define GPIO_ABCD_INT_ENABLE (0x008 >> 2) +#define GPIO_ABCD_INT_SENS_0 (0x00C >> 2) +#define GPIO_ABCD_INT_SENS_1 (0x010 >> 2) +#define GPIO_ABCD_INT_SENS_2 (0x014 >> 2) +#define GPIO_ABCD_INT_STATUS (0x018 >> 2) +#define GPIO_ABCD_RESET_TOLERANT (0x01C >> 2) +#define GPIO_EFGH_DATA_VALUE (0x020 >> 2) +#define GPIO_EFGH_DIRECTION (0x024 >> 2) +#define GPIO_EFGH_INT_ENABLE (0x028 >> 2) +#define GPIO_EFGH_INT_SENS_0 (0x02C >> 2) +#define GPIO_EFGH_INT_SENS_1 (0x030 >> 2) +#define GPIO_EFGH_INT_SENS_2 (0x034 >> 2) +#define GPIO_EFGH_INT_STATUS (0x038 >> 2) +#define GPIO_EFGH_RESET_TOLERANT (0x03C >> 2) +#define GPIO_ABCD_DEBOUNCE_1 (0x040 >> 2) +#define GPIO_ABCD_DEBOUNCE_2 (0x044 >> 2) +#define GPIO_EFGH_DEBOUNCE_1 (0x048 >> 2) +#define GPIO_EFGH_DEBOUNCE_2 (0x04C >> 2) +#define GPIO_DEBOUNCE_TIME_1 (0x050 >> 2) +#define GPIO_DEBOUNCE_TIME_2 (0x054 >> 2) +#define GPIO_DEBOUNCE_TIME_3 (0x058 >> 2) +#define GPIO_ABCD_COMMAND_SRC_0 (0x060 >> 2) +#define GPIO_ABCD_COMMAND_SRC_1 (0x064 >> 2) +#define GPIO_EFGH_COMMAND_SRC_0 (0x068 >> 2) +#define GPIO_EFGH_COMMAND_SRC_1 (0x06C >> 2) +#define GPIO_IJKL_DATA_VALUE (0x070 >> 2) +#define GPIO_IJKL_DIRECTION (0x074 >> 2) +#define GPIO_MNOP_DATA_VALUE (0x078 >> 2) +#define GPIO_MNOP_DIRECTION (0x07C >> 2) +#define GPIO_QRST_DATA_VALUE (0x080 >> 2) +#define GPIO_QRST_DIRECTION (0x084 >> 2) +#define GPIO_UVWX_DATA_VALUE (0x088 >> 2) +#define GPIO_UVWX_DIRECTION (0x08C >> 2) +#define GPIO_IJKL_COMMAND_SRC_0 (0x090 >> 2) +#define GPIO_IJKL_COMMAND_SRC_1 (0x094 >> 2) +#define GPIO_IJKL_INT_ENABLE (0x098 >> 2) +#define GPIO_IJKL_INT_SENS_0 (0x09C >> 2) +#define GPIO_IJKL_INT_SENS_1 (0x0A0 >> 2) +#define GPIO_IJKL_INT_SENS_2 (0x0A4 >> 2) +#define GPIO_IJKL_INT_STATUS (0x0A8 >> 2) +#define GPIO_IJKL_RESET_TOLERANT (0x0AC >> 2) +#define GPIO_IJKL_DEBOUNCE_1 (0x0B0 >> 2) +#define GPIO_IJKL_DEBOUNCE_2 (0x0B4 >> 2) +#define GPIO_IJKL_INPUT_MASK (0x0B8 >> 2) +#define GPIO_ABCD_DATA_READ (0x0C0 >> 2) +#define GPIO_EFGH_DATA_READ (0x0C4 >> 2) +#define GPIO_IJKL_DATA_READ (0x0C8 >> 2) +#define GPIO_MNOP_DATA_READ (0x0CC >> 2) +#define GPIO_QRST_DATA_READ (0x0D0 >> 2) +#define GPIO_UVWX_DATA_READ (0x0D4 >> 2) +#define GPIO_YZAAAB_DATA_READ (0x0D8 >> 2) +#define GPIO_AC_DATA_READ (0x0DC >> 2) +#define GPIO_MNOP_COMMAND_SRC_0 (0x0E0 >> 2) +#define GPIO_MNOP_COMMAND_SRC_1 (0x0E4 >> 2) +#define GPIO_MNOP_INT_ENABLE (0x0E8 >> 2) +#define GPIO_MNOP_INT_SENS_0 (0x0EC >> 2) +#define GPIO_MNOP_INT_SENS_1 (0x0F0 >> 2) +#define GPIO_MNOP_INT_SENS_2 (0x0F4 >> 2) +#define GPIO_MNOP_INT_STATUS (0x0F8 >> 2) +#define GPIO_MNOP_RESET_TOLERANT (0x0FC >> 2) +#define GPIO_MNOP_DEBOUNCE_1 (0x100 >> 2) +#define GPIO_MNOP_DEBOUNCE_2 (0x104 >> 2) +#define GPIO_MNOP_INPUT_MASK (0x108 >> 2) +#define GPIO_QRST_COMMAND_SRC_0 (0x110 >> 2) +#define GPIO_QRST_COMMAND_SRC_1 (0x114 >> 2) +#define GPIO_QRST_INT_ENABLE (0x118 >> 2) +#define GPIO_QRST_INT_SENS_0 (0x11C >> 2) +#define GPIO_QRST_INT_SENS_1 (0x120 >> 2) +#define GPIO_QRST_INT_SENS_2 (0x124 >> 2) +#define GPIO_QRST_INT_STATUS (0x128 >> 2) +#define GPIO_QRST_RESET_TOLERANT (0x12C >> 2) +#define GPIO_QRST_DEBOUNCE_1 (0x130 >> 2) +#define GPIO_QRST_DEBOUNCE_2 (0x134 >> 2) +#define GPIO_QRST_INPUT_MASK (0x138 >> 2) +#define GPIO_UVWX_COMMAND_SRC_0 (0x140 >> 2) +#define GPIO_UVWX_COMMAND_SRC_1 (0x144 >> 2) +#define GPIO_UVWX_INT_ENABLE (0x148 >> 2) +#define GPIO_UVWX_INT_SENS_0 (0x14C >> 2) +#define GPIO_UVWX_INT_SENS_1 (0x150 >> 2) +#define GPIO_UVWX_INT_SENS_2 (0x154 >> 2) +#define GPIO_UVWX_INT_STATUS (0x158 >> 2) +#define GPIO_UVWX_RESET_TOLERANT (0x15C >> 2) +#define GPIO_UVWX_DEBOUNCE_1 (0x160 >> 2) +#define GPIO_UVWX_DEBOUNCE_2 (0x164 >> 2) +#define GPIO_UVWX_INPUT_MASK (0x168 >> 2) +#define GPIO_YZAAAB_COMMAND_SRC_0 (0x170 >> 2) +#define GPIO_YZAAAB_COMMAND_SRC_1 (0x174 >> 2) +#define GPIO_YZAAAB_INT_ENABLE (0x178 >> 2) +#define GPIO_YZAAAB_INT_SENS_0 (0x17C >> 2) +#define GPIO_YZAAAB_INT_SENS_1 (0x180 >> 2) +#define GPIO_YZAAAB_INT_SENS_2 (0x184 >> 2) +#define GPIO_YZAAAB_INT_STATUS (0x188 >> 2) +#define GPIO_YZAAAB_RESET_TOLERANT (0x18C >> 2) +#define GPIO_YZAAAB_DEBOUNCE_1 (0x190 >> 2) +#define GPIO_YZAAAB_DEBOUNCE_2 (0x194 >> 2) +#define GPIO_YZAAAB_INPUT_MASK (0x198 >> 2) +#define GPIO_AC_COMMAND_SRC_0 (0x1A0 >> 2) +#define GPIO_AC_COMMAND_SRC_1 (0x1A4 >> 2) +#define GPIO_AC_INT_ENABLE (0x1A8 >> 2) +#define GPIO_AC_INT_SENS_0 (0x1AC >> 2) +#define GPIO_AC_INT_SENS_1 (0x1B0 >> 2) +#define GPIO_AC_INT_SENS_2 (0x1B4 >> 2) +#define GPIO_AC_INT_STATUS (0x1B8 >> 2) +#define GPIO_AC_RESET_TOLERANT (0x1BC >> 2) +#define GPIO_AC_DEBOUNCE_1 (0x1C0 >> 2) +#define GPIO_AC_DEBOUNCE_2 (0x1C4 >> 2) +#define GPIO_AC_INPUT_MASK (0x1C8 >> 2) +#define GPIO_ABCD_INPUT_MASK (0x1D0 >> 2) +#define GPIO_EFGH_INPUT_MASK (0x1D4 >> 2) +#define GPIO_YZAAAB_DATA_VALUE (0x1E0 >> 2) +#define GPIO_YZAAAB_DIRECTION (0x1E4 >> 2) +#define GPIO_AC_DATA_VALUE (0x1E8 >> 2) +#define GPIO_AC_DIRECTION (0x1EC >> 2) +#define GPIO_3_6V_MEM_SIZE 0x1F0 +#define GPIO_3_6V_REG_ARRAY_SIZE (GPIO_3_6V_MEM_SIZE >> 2) + +static int aspeed_evaluate_irq(GPIOSets *regs, int gpio_prev_high, int gpio) +{ + uint32_t falling_edge = 0, rising_edge = 0; + uint32_t int_trigger = extract32(regs->int_sens_0, gpio, 1) + | extract32(regs->int_sens_1, gpio, 1) << 1 + | extract32(regs->int_sens_2, gpio, 1) << 2; + uint32_t gpio_curr_high = extract32(regs->data_value, gpio, 1); + uint32_t gpio_int_enabled = extract32(regs->int_enable, gpio, 1); + + if (!gpio_int_enabled) { + return 0; + } + + /* Detect edges */ + if (gpio_curr_high && !gpio_prev_high) { + rising_edge = 1; + } else if (!gpio_curr_high && gpio_prev_high) { + falling_edge = 1; + } + + if (((int_trigger == ASPEED_FALLING_EDGE) && falling_edge) || + ((int_trigger == ASPEED_RISING_EDGE) && rising_edge) || + ((int_trigger == ASPEED_LEVEL_LOW) && !gpio_curr_high) || + ((int_trigger == ASPEED_LEVEL_HIGH) && gpio_curr_high) || + ((int_trigger >= ASPEED_DUAL_EDGE) && (rising_edge || falling_edge))) + { + regs->int_status = deposit32(regs->int_status, gpio, 1, 1); + return 1; + } + return 0; +} + +#define nested_struct_index(ta, pa, m, tb, pb) \ + (pb - ((tb *)(((char *)pa) + offsetof(ta, m)))) + +static ptrdiff_t aspeed_gpio_set_idx(AspeedGPIOState *s, GPIOSets *regs) +{ + return nested_struct_index(AspeedGPIOState, s, sets, GPIOSets, regs); +} + +static void aspeed_gpio_update(AspeedGPIOState *s, GPIOSets *regs, + uint32_t value) +{ + uint32_t input_mask = regs->input_mask; + uint32_t direction = regs->direction; + uint32_t old = regs->data_value; + uint32_t new = value; + uint32_t diff; + int gpio; + + diff = old ^ new; + if (diff) { + for (gpio = 0; gpio < GPIOS_PER_REG; gpio++) { + uint32_t mask = 1 << gpio; + + /* If the gpio needs to be updated... */ + if (!(diff & mask)) { + continue; + } + + /* ...and we're output or not input-masked... */ + if (!(direction & mask) && (input_mask & mask)) { + continue; + } + + /* ...then update the state. */ + if (mask & new) { + regs->data_value |= mask; + } else { + regs->data_value &= ~mask; + } + + /* If the gpio is set to output... */ + if (direction & mask) { + /* ...trigger the line-state IRQ */ + ptrdiff_t set = aspeed_gpio_set_idx(s, regs); + size_t offset = set * GPIOS_PER_SET + gpio; + qemu_set_irq(s->gpios[offset], !!(new & mask)); + } else { + /* ...otherwise if we meet the line's current IRQ policy... */ + if (aspeed_evaluate_irq(regs, old & mask, gpio)) { + /* ...trigger the VIC IRQ */ + s->pending++; + } + } + } + } + qemu_set_irq(s->irq, !!(s->pending)); +} + +static uint32_t aspeed_adjust_pin(AspeedGPIOState *s, uint32_t pin) +{ + AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s); + /* + * The 2500 has a 4 pin gap in group AB and the 2400 has a 4 pin + * gap in group Y (and only four pins in AB but this is the last group so + * it doesn't matter). + */ + if (agc->gap && pin >= agc->gap) { + pin += GPIO_PIN_GAP_SIZE; + } + + return pin; +} + +static bool aspeed_gpio_get_pin_level(AspeedGPIOState *s, uint32_t set_idx, + uint32_t pin) +{ + uint32_t reg_val; + uint32_t pin_mask = 1 << pin; + + reg_val = s->sets[set_idx].data_value; + + return !!(reg_val & pin_mask); +} + +static void aspeed_gpio_set_pin_level(AspeedGPIOState *s, uint32_t set_idx, + uint32_t pin, bool level) +{ + uint32_t value = s->sets[set_idx].data_value; + uint32_t pin_mask = 1 << pin; + + if (level) { + value |= pin_mask; + } else { + value &= !pin_mask; + } + + aspeed_gpio_update(s, &s->sets[set_idx], value); +} + +/* + * | src_1 | src_2 | source | + * |-----------------------------| + * | 0 | 0 | ARM | + * | 0 | 1 | LPC | + * | 1 | 0 | Coprocessor| + * | 1 | 1 | Reserved | + * + * Once the source of a set is programmed, corresponding bits in the + * data_value, direction, interrupt [enable, sens[0-2]], reset_tol and + * debounce registers can only be written by the source. + * + * Source is ARM by default + * only bits 24, 16, 8, and 0 can be set + * + * we don't currently have a model for the LPC or Coprocessor + */ +static uint32_t update_value_control_source(GPIOSets *regs, uint32_t old_value, + uint32_t value) +{ + int i; + int cmd_source; + + /* assume the source is always ARM for now */ + int source = ASPEED_SOURCE_ARM; + + uint32_t new_value = 0; + + /* for each group in set */ + for (i = 0; i < GPIOS_PER_REG; i += GPIOS_PER_GROUP) { + cmd_source = extract32(regs->cmd_source_0, i, 1) + | (extract32(regs->cmd_source_1, i, 1) << 1); + + if (source == cmd_source) { + new_value |= (0xff << i) & value; + } else { + new_value |= (0xff << i) & old_value; + } + } + return new_value; +} + +static const AspeedGPIOReg aspeed_3_6v_gpios[GPIO_3_6V_REG_ARRAY_SIZE] = { + /* Set ABCD */ + [GPIO_ABCD_DATA_VALUE] = { 0, gpio_reg_data_value }, + [GPIO_ABCD_DIRECTION] = { 0, gpio_reg_direction }, + [GPIO_ABCD_INT_ENABLE] = { 0, gpio_reg_int_enable }, + [GPIO_ABCD_INT_SENS_0] = { 0, gpio_reg_int_sens_0 }, + [GPIO_ABCD_INT_SENS_1] = { 0, gpio_reg_int_sens_1 }, + [GPIO_ABCD_INT_SENS_2] = { 0, gpio_reg_int_sens_2 }, + [GPIO_ABCD_INT_STATUS] = { 0, gpio_reg_int_status }, + [GPIO_ABCD_RESET_TOLERANT] = { 0, gpio_reg_reset_tolerant }, + [GPIO_ABCD_DEBOUNCE_1] = { 0, gpio_reg_debounce_1 }, + [GPIO_ABCD_DEBOUNCE_2] = { 0, gpio_reg_debounce_2 }, + [GPIO_ABCD_COMMAND_SRC_0] = { 0, gpio_reg_cmd_source_0 }, + [GPIO_ABCD_COMMAND_SRC_1] = { 0, gpio_reg_cmd_source_1 }, + [GPIO_ABCD_DATA_READ] = { 0, gpio_reg_data_read }, + [GPIO_ABCD_INPUT_MASK] = { 0, gpio_reg_input_mask }, + /* Set EFGH */ + [GPIO_EFGH_DATA_VALUE] = { 1, gpio_reg_data_value }, + [GPIO_EFGH_DIRECTION] = { 1, gpio_reg_direction }, + [GPIO_EFGH_INT_ENABLE] = { 1, gpio_reg_int_enable }, + [GPIO_EFGH_INT_SENS_0] = { 1, gpio_reg_int_sens_0 }, + [GPIO_EFGH_INT_SENS_1] = { 1, gpio_reg_int_sens_1 }, + [GPIO_EFGH_INT_SENS_2] = { 1, gpio_reg_int_sens_2 }, + [GPIO_EFGH_INT_STATUS] = { 1, gpio_reg_int_status }, + [GPIO_EFGH_RESET_TOLERANT] = { 1, gpio_reg_reset_tolerant }, + [GPIO_EFGH_DEBOUNCE_1] = { 1, gpio_reg_debounce_1 }, + [GPIO_EFGH_DEBOUNCE_2] = { 1, gpio_reg_debounce_2 }, + [GPIO_EFGH_COMMAND_SRC_0] = { 1, gpio_reg_cmd_source_0 }, + [GPIO_EFGH_COMMAND_SRC_1] = { 1, gpio_reg_cmd_source_1 }, + [GPIO_EFGH_DATA_READ] = { 1, gpio_reg_data_read }, + [GPIO_EFGH_INPUT_MASK] = { 1, gpio_reg_input_mask }, + /* Set IJKL */ + [GPIO_IJKL_DATA_VALUE] = { 2, gpio_reg_data_value }, + [GPIO_IJKL_DIRECTION] = { 2, gpio_reg_direction }, + [GPIO_IJKL_INT_ENABLE] = { 2, gpio_reg_int_enable }, + [GPIO_IJKL_INT_SENS_0] = { 2, gpio_reg_int_sens_0 }, + [GPIO_IJKL_INT_SENS_1] = { 2, gpio_reg_int_sens_1 }, + [GPIO_IJKL_INT_SENS_2] = { 2, gpio_reg_int_sens_2 }, + [GPIO_IJKL_INT_STATUS] = { 2, gpio_reg_int_status }, + [GPIO_IJKL_RESET_TOLERANT] = { 2, gpio_reg_reset_tolerant }, + [GPIO_IJKL_DEBOUNCE_1] = { 2, gpio_reg_debounce_1 }, + [GPIO_IJKL_DEBOUNCE_2] = { 2, gpio_reg_debounce_2 }, + [GPIO_IJKL_COMMAND_SRC_0] = { 2, gpio_reg_cmd_source_0 }, + [GPIO_IJKL_COMMAND_SRC_1] = { 2, gpio_reg_cmd_source_1 }, + [GPIO_IJKL_DATA_READ] = { 2, gpio_reg_data_read }, + [GPIO_IJKL_INPUT_MASK] = { 2, gpio_reg_input_mask }, + /* Set MNOP */ + [GPIO_MNOP_DATA_VALUE] = { 3, gpio_reg_data_value }, + [GPIO_MNOP_DIRECTION] = { 3, gpio_reg_direction }, + [GPIO_MNOP_INT_ENABLE] = { 3, gpio_reg_int_enable }, + [GPIO_MNOP_INT_SENS_0] = { 3, gpio_reg_int_sens_0 }, + [GPIO_MNOP_INT_SENS_1] = { 3, gpio_reg_int_sens_1 }, + [GPIO_MNOP_INT_SENS_2] = { 3, gpio_reg_int_sens_2 }, + [GPIO_MNOP_INT_STATUS] = { 3, gpio_reg_int_status }, + [GPIO_MNOP_RESET_TOLERANT] = { 3, gpio_reg_reset_tolerant }, + [GPIO_MNOP_DEBOUNCE_1] = { 3, gpio_reg_debounce_1 }, + [GPIO_MNOP_DEBOUNCE_2] = { 3, gpio_reg_debounce_2 }, + [GPIO_MNOP_COMMAND_SRC_0] = { 3, gpio_reg_cmd_source_0 }, + [GPIO_MNOP_COMMAND_SRC_1] = { 3, gpio_reg_cmd_source_1 }, + [GPIO_MNOP_DATA_READ] = { 3, gpio_reg_data_read }, + [GPIO_MNOP_INPUT_MASK] = { 3, gpio_reg_input_mask }, + /* Set QRST */ + [GPIO_QRST_DATA_VALUE] = { 4, gpio_reg_data_value }, + [GPIO_QRST_DIRECTION] = { 4, gpio_reg_direction }, + [GPIO_QRST_INT_ENABLE] = { 4, gpio_reg_int_enable }, + [GPIO_QRST_INT_SENS_0] = { 4, gpio_reg_int_sens_0 }, + [GPIO_QRST_INT_SENS_1] = { 4, gpio_reg_int_sens_1 }, + [GPIO_QRST_INT_SENS_2] = { 4, gpio_reg_int_sens_2 }, + [GPIO_QRST_INT_STATUS] = { 4, gpio_reg_int_status }, + [GPIO_QRST_RESET_TOLERANT] = { 4, gpio_reg_reset_tolerant }, + [GPIO_QRST_DEBOUNCE_1] = { 4, gpio_reg_debounce_1 }, + [GPIO_QRST_DEBOUNCE_2] = { 4, gpio_reg_debounce_2 }, + [GPIO_QRST_COMMAND_SRC_0] = { 4, gpio_reg_cmd_source_0 }, + [GPIO_QRST_COMMAND_SRC_1] = { 4, gpio_reg_cmd_source_1 }, + [GPIO_QRST_DATA_READ] = { 4, gpio_reg_data_read }, + [GPIO_QRST_INPUT_MASK] = { 4, gpio_reg_input_mask }, + /* Set UVWX */ + [GPIO_UVWX_DATA_VALUE] = { 5, gpio_reg_data_value }, + [GPIO_UVWX_DIRECTION] = { 5, gpio_reg_direction }, + [GPIO_UVWX_INT_ENABLE] = { 5, gpio_reg_int_enable }, + [GPIO_UVWX_INT_SENS_0] = { 5, gpio_reg_int_sens_0 }, + [GPIO_UVWX_INT_SENS_1] = { 5, gpio_reg_int_sens_1 }, + [GPIO_UVWX_INT_SENS_2] = { 5, gpio_reg_int_sens_2 }, + [GPIO_UVWX_INT_STATUS] = { 5, gpio_reg_int_status }, + [GPIO_UVWX_RESET_TOLERANT] = { 5, gpio_reg_reset_tolerant }, + [GPIO_UVWX_DEBOUNCE_1] = { 5, gpio_reg_debounce_1 }, + [GPIO_UVWX_DEBOUNCE_2] = { 5, gpio_reg_debounce_2 }, + [GPIO_UVWX_COMMAND_SRC_0] = { 5, gpio_reg_cmd_source_0 }, + [GPIO_UVWX_COMMAND_SRC_1] = { 5, gpio_reg_cmd_source_1 }, + [GPIO_UVWX_DATA_READ] = { 5, gpio_reg_data_read }, + [GPIO_UVWX_INPUT_MASK] = { 5, gpio_reg_input_mask }, + /* Set YZAAAB */ + [GPIO_YZAAAB_DATA_VALUE] = { 6, gpio_reg_data_value }, + [GPIO_YZAAAB_DIRECTION] = { 6, gpio_reg_direction }, + [GPIO_YZAAAB_INT_ENABLE] = { 6, gpio_reg_int_enable }, + [GPIO_YZAAAB_INT_SENS_0] = { 6, gpio_reg_int_sens_0 }, + [GPIO_YZAAAB_INT_SENS_1] = { 6, gpio_reg_int_sens_1 }, + [GPIO_YZAAAB_INT_SENS_2] = { 6, gpio_reg_int_sens_2 }, + [GPIO_YZAAAB_INT_STATUS] = { 6, gpio_reg_int_status }, + [GPIO_YZAAAB_RESET_TOLERANT] = { 6, gpio_reg_reset_tolerant }, + [GPIO_YZAAAB_DEBOUNCE_1] = { 6, gpio_reg_debounce_1 }, + [GPIO_YZAAAB_DEBOUNCE_2] = { 6, gpio_reg_debounce_2 }, + [GPIO_YZAAAB_COMMAND_SRC_0] = { 6, gpio_reg_cmd_source_0 }, + [GPIO_YZAAAB_COMMAND_SRC_1] = { 6, gpio_reg_cmd_source_1 }, + [GPIO_YZAAAB_DATA_READ] = { 6, gpio_reg_data_read }, + [GPIO_YZAAAB_INPUT_MASK] = { 6, gpio_reg_input_mask }, + /* Set AC (ast2500 only) */ + [GPIO_AC_DATA_VALUE] = { 7, gpio_reg_data_value }, + [GPIO_AC_DIRECTION] = { 7, gpio_reg_direction }, + [GPIO_AC_INT_ENABLE] = { 7, gpio_reg_int_enable }, + [GPIO_AC_INT_SENS_0] = { 7, gpio_reg_int_sens_0 }, + [GPIO_AC_INT_SENS_1] = { 7, gpio_reg_int_sens_1 }, + [GPIO_AC_INT_SENS_2] = { 7, gpio_reg_int_sens_2 }, + [GPIO_AC_INT_STATUS] = { 7, gpio_reg_int_status }, + [GPIO_AC_RESET_TOLERANT] = { 7, gpio_reg_reset_tolerant }, + [GPIO_AC_DEBOUNCE_1] = { 7, gpio_reg_debounce_1 }, + [GPIO_AC_DEBOUNCE_2] = { 7, gpio_reg_debounce_2 }, + [GPIO_AC_COMMAND_SRC_0] = { 7, gpio_reg_cmd_source_0 }, + [GPIO_AC_COMMAND_SRC_1] = { 7, gpio_reg_cmd_source_1 }, + [GPIO_AC_DATA_READ] = { 7, gpio_reg_data_read }, + [GPIO_AC_INPUT_MASK] = { 7, gpio_reg_input_mask }, +}; + +static uint64_t aspeed_gpio_read(void *opaque, hwaddr offset, uint32_t size) +{ + AspeedGPIOState *s = ASPEED_GPIO(opaque); + AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s); + uint64_t idx = -1; + const AspeedGPIOReg *reg; + GPIOSets *set; + + idx = offset >> 2; + if (idx >= GPIO_DEBOUNCE_TIME_1 && idx <= GPIO_DEBOUNCE_TIME_3) { + idx -= GPIO_DEBOUNCE_TIME_1; + return (uint64_t) s->debounce_regs[idx]; + } + + reg = &agc->reg_table[idx]; + if (reg->set_idx >= agc->nr_gpio_sets) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: no getter for offset 0x%" + HWADDR_PRIx"\n", __func__, offset); + return 0; + } + + set = &s->sets[reg->set_idx]; + switch (reg->type) { + case gpio_reg_data_value: + return set->data_value; + case gpio_reg_direction: + return set->direction; + case gpio_reg_int_enable: + return set->int_enable; + case gpio_reg_int_sens_0: + return set->int_sens_0; + case gpio_reg_int_sens_1: + return set->int_sens_1; + case gpio_reg_int_sens_2: + return set->int_sens_2; + case gpio_reg_int_status: + return set->int_status; + case gpio_reg_reset_tolerant: + return set->reset_tol; + case gpio_reg_debounce_1: + return set->debounce_1; + case gpio_reg_debounce_2: + return set->debounce_2; + case gpio_reg_cmd_source_0: + return set->cmd_source_0; + case gpio_reg_cmd_source_1: + return set->cmd_source_1; + case gpio_reg_data_read: + return set->data_read; + case gpio_reg_input_mask: + return set->input_mask; + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: no getter for offset 0x%" + HWADDR_PRIx"\n", __func__, offset); + return 0; + }; +} + +static void aspeed_gpio_write(void *opaque, hwaddr offset, uint64_t data, + uint32_t size) +{ + AspeedGPIOState *s = ASPEED_GPIO(opaque); + AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s); + const GPIOSetProperties *props; + uint64_t idx = -1; + const AspeedGPIOReg *reg; + GPIOSets *set; + uint32_t cleared; + + idx = offset >> 2; + if (idx >= GPIO_DEBOUNCE_TIME_1 && idx <= GPIO_DEBOUNCE_TIME_3) { + idx -= GPIO_DEBOUNCE_TIME_1; + s->debounce_regs[idx] = (uint32_t) data; + return; + } + + reg = &agc->reg_table[idx]; + if (reg->set_idx >= agc->nr_gpio_sets) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: no setter for offset 0x%" + HWADDR_PRIx"\n", __func__, offset); + return; + } + + set = &s->sets[reg->set_idx]; + props = &agc->props[reg->set_idx]; + + switch (reg->type) { + case gpio_reg_data_value: + data &= props->output; + data = update_value_control_source(set, set->data_value, data); + set->data_read = data; + aspeed_gpio_update(s, set, data); + return; + case gpio_reg_direction: + /* + * where data is the value attempted to be written to the pin: + * pin type | input mask | output mask | expected value + * ------------------------------------------------------------ + * bidirectional | 1 | 1 | data + * input only | 1 | 0 | 0 + * output only | 0 | 1 | 1 + * no pin / gap | 0 | 0 | 0 + * + * which is captured by: + * data = ( data | ~input) & output; + */ + data = (data | ~props->input) & props->output; + set->direction = update_value_control_source(set, set->direction, data); + break; + case gpio_reg_int_enable: + set->int_enable = update_value_control_source(set, set->int_enable, + data); + break; + case gpio_reg_int_sens_0: + set->int_sens_0 = update_value_control_source(set, set->int_sens_0, + data); + break; + case gpio_reg_int_sens_1: + set->int_sens_1 = update_value_control_source(set, set->int_sens_1, + data); + break; + case gpio_reg_int_sens_2: + set->int_sens_2 = update_value_control_source(set, set->int_sens_2, + data); + break; + case gpio_reg_int_status: + cleared = ctpop32(data & set->int_status); + if (s->pending && cleared) { + assert(s->pending >= cleared); + s->pending -= cleared; + } + set->int_status &= ~data; + break; + case gpio_reg_reset_tolerant: + set->reset_tol = update_value_control_source(set, set->reset_tol, + data); + return; + case gpio_reg_debounce_1: + set->debounce_1 = update_value_control_source(set, set->debounce_1, + data); + return; + case gpio_reg_debounce_2: + set->debounce_2 = update_value_control_source(set, set->debounce_2, + data); + return; + case gpio_reg_cmd_source_0: + set->cmd_source_0 = data & ASPEED_CMD_SRC_MASK; + return; + case gpio_reg_cmd_source_1: + set->cmd_source_1 = data & ASPEED_CMD_SRC_MASK; + return; + case gpio_reg_data_read: + /* Read only register */ + return; + case gpio_reg_input_mask: + /* + * feeds into interrupt generation + * 0: read from data value reg will be updated + * 1: read from data value reg will not be updated + */ + set->input_mask = data & props->input; + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: no setter for offset 0x%" + HWADDR_PRIx"\n", __func__, offset); + return; + } + aspeed_gpio_update(s, set, set->data_value); + return; +} + +static int get_set_idx(AspeedGPIOState *s, const char *group, int *group_idx) +{ + AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s); + int set_idx, g_idx = *group_idx; + + for (set_idx = 0; set_idx < agc->nr_gpio_sets; set_idx++) { + const GPIOSetProperties *set_props = &agc->props[set_idx]; + for (g_idx = 0; g_idx < ASPEED_GROUPS_PER_SET; g_idx++) { + if (!strncmp(group, set_props->group_label[g_idx], strlen(group))) { + *group_idx = g_idx; + return set_idx; + } + } + } + return -1; +} + +static void aspeed_gpio_get_pin(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + int pin = 0xfff; + bool level = true; + char group[3]; + AspeedGPIOState *s = ASPEED_GPIO(obj); + int set_idx, group_idx = 0; + + if (sscanf(name, "gpio%2[A-Z]%1d", group, &pin) != 2) { + error_setg(errp, "%s: error reading %s", __func__, name); + return; + } + set_idx = get_set_idx(s, group, &group_idx); + if (set_idx == -1) { + error_setg(errp, "%s: invalid group %s", __func__, group); + return; + } + pin = pin + group_idx * GPIOS_PER_GROUP; + level = aspeed_gpio_get_pin_level(s, set_idx, pin); + visit_type_bool(v, name, &level, errp); +} + +static void aspeed_gpio_set_pin(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + Error *local_err = NULL; + bool level; + int pin = 0xfff; + char group[3]; + AspeedGPIOState *s = ASPEED_GPIO(obj); + int set_idx, group_idx = 0; + + visit_type_bool(v, name, &level, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + if (sscanf(name, "gpio%2[A-Z]%1d", group, &pin) != 2) { + error_setg(errp, "%s: error reading %s", __func__, name); + return; + } + set_idx = get_set_idx(s, group, &group_idx); + if (set_idx == -1) { + error_setg(errp, "%s: invalid group %s", __func__, group); + return; + } + pin = pin + group_idx * GPIOS_PER_GROUP; + aspeed_gpio_set_pin_level(s, set_idx, pin, level); +} + +/****************** Setup functions ******************/ +static const GPIOSetProperties ast2400_set_props[] = { + [0] = {0xffffffff, 0xffffffff, {"A", "B", "C", "D"} }, + [1] = {0xffffffff, 0xffffffff, {"E", "F", "G", "H"} }, + [2] = {0xffffffff, 0xffffffff, {"I", "J", "K", "L"} }, + [3] = {0xffffffff, 0xffffffff, {"M", "N", "O", "P"} }, + [4] = {0xffffffff, 0xffffffff, {"Q", "R", "S", "T"} }, + [5] = {0xffffffff, 0x0000ffff, {"U", "V", "W", "X"} }, + [6] = {0x0000000f, 0x0fffff0f, {"Y", "Z", "AA", "AB"} }, +}; + +static const GPIOSetProperties ast2500_set_props[] = { + [0] = {0xffffffff, 0xffffffff, {"A", "B", "C", "D"} }, + [1] = {0xffffffff, 0xffffffff, {"E", "F", "G", "H"} }, + [2] = {0xffffffff, 0xffffffff, {"I", "J", "K", "L"} }, + [3] = {0xffffffff, 0xffffffff, {"M", "N", "O", "P"} }, + [4] = {0xffffffff, 0xffffffff, {"Q", "R", "S", "T"} }, + [5] = {0xffffffff, 0x0000ffff, {"U", "V", "W", "X"} }, + [6] = {0xffffff0f, 0x0fffff0f, {"Y", "Z", "AA", "AB"} }, + [7] = {0x000000ff, 0x000000ff, {"AC"} }, +}; + +static const MemoryRegionOps aspeed_gpio_ops = { + .read = aspeed_gpio_read, + .write = aspeed_gpio_write, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid.min_access_size = 4, + .valid.max_access_size = 4, +}; + +static void aspeed_gpio_reset(DeviceState *dev) +{ + AspeedGPIOState *s = ASPEED_GPIO(dev); + + /* TODO: respect the reset tolerance registers */ + memset(s->sets, 0, sizeof(s->sets)); +} + +static void aspeed_gpio_realize(DeviceState *dev, Error **errp) +{ + AspeedGPIOState *s = ASPEED_GPIO(dev); + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); + AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s); + int pin; + + /* Interrupt parent line */ + sysbus_init_irq(sbd, &s->irq); + + /* Individual GPIOs */ + for (pin = 0; pin < agc->nr_gpio_pins; pin++) { + sysbus_init_irq(sbd, &s->gpios[pin]); + } + + memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_gpio_ops, s, + TYPE_ASPEED_GPIO, GPIO_3_6V_MEM_SIZE); + + sysbus_init_mmio(sbd, &s->iomem); +} + +static void aspeed_gpio_init(Object *obj) +{ + AspeedGPIOState *s = ASPEED_GPIO(obj); + AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s); + int pin; + + for (pin = 0; pin < agc->nr_gpio_pins; pin++) { + char *name; + int set_idx = pin / GPIOS_PER_SET; + int pin_idx = aspeed_adjust_pin(s, pin) - (set_idx * GPIOS_PER_SET); + int group_idx = pin_idx >> GPIO_GROUP_SHIFT; + const GPIOSetProperties *props = &agc->props[set_idx]; + + name = g_strdup_printf("gpio%s%d", props->group_label[group_idx], + pin_idx % GPIOS_PER_GROUP); + object_property_add(obj, name, "bool", aspeed_gpio_get_pin, + aspeed_gpio_set_pin, NULL, NULL, NULL); + } +} + +static const VMStateDescription vmstate_gpio_regs = { + .name = TYPE_ASPEED_GPIO"/regs", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(data_value, GPIOSets), + VMSTATE_UINT32(data_read, GPIOSets), + VMSTATE_UINT32(direction, GPIOSets), + VMSTATE_UINT32(int_enable, GPIOSets), + VMSTATE_UINT32(int_sens_0, GPIOSets), + VMSTATE_UINT32(int_sens_1, GPIOSets), + VMSTATE_UINT32(int_sens_2, GPIOSets), + VMSTATE_UINT32(int_status, GPIOSets), + VMSTATE_UINT32(reset_tol, GPIOSets), + VMSTATE_UINT32(cmd_source_0, GPIOSets), + VMSTATE_UINT32(cmd_source_1, GPIOSets), + VMSTATE_UINT32(debounce_1, GPIOSets), + VMSTATE_UINT32(debounce_2, GPIOSets), + VMSTATE_UINT32(input_mask, GPIOSets), + VMSTATE_END_OF_LIST(), + } +}; + +static const VMStateDescription vmstate_aspeed_gpio = { + .name = TYPE_ASPEED_GPIO, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_STRUCT_ARRAY(sets, AspeedGPIOState, ASPEED_GPIO_MAX_NR_SETS, + 1, vmstate_gpio_regs, GPIOSets), + VMSTATE_UINT32_ARRAY(debounce_regs, AspeedGPIOState, + ASPEED_GPIO_NR_DEBOUNCE_REGS), + VMSTATE_END_OF_LIST(), + } +}; + +static void aspeed_gpio_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = aspeed_gpio_realize; + dc->reset = aspeed_gpio_reset; + dc->desc = "Aspeed GPIO Controller"; + dc->vmsd = &vmstate_aspeed_gpio; +} + +static void aspeed_gpio_ast2400_class_init(ObjectClass *klass, void *data) +{ + AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass); + + agc->props = ast2400_set_props; + agc->nr_gpio_pins = 216; + agc->nr_gpio_sets = 7; + agc->gap = 196; + agc->reg_table = aspeed_3_6v_gpios; +} + +static void aspeed_gpio_2500_class_init(ObjectClass *klass, void *data) +{ + AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass); + + agc->props = ast2500_set_props; + agc->nr_gpio_pins = 228; + agc->nr_gpio_sets = 8; + agc->gap = 220; + agc->reg_table = aspeed_3_6v_gpios; +} + +static const TypeInfo aspeed_gpio_info = { + .name = TYPE_ASPEED_GPIO, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(AspeedGPIOState), + .class_size = sizeof(AspeedGPIOClass), + .class_init = aspeed_gpio_class_init, + .abstract = true, +}; + +static const TypeInfo aspeed_gpio_ast2400_info = { + .name = TYPE_ASPEED_GPIO "-ast2400", + .parent = TYPE_ASPEED_GPIO, + .class_init = aspeed_gpio_ast2400_class_init, + .instance_init = aspeed_gpio_init, +}; + +static const TypeInfo aspeed_gpio_ast2500_info = { + .name = TYPE_ASPEED_GPIO "-ast2500", + .parent = TYPE_ASPEED_GPIO, + .class_init = aspeed_gpio_2500_class_init, + .instance_init = aspeed_gpio_init, +}; + +static void aspeed_gpio_register_types(void) +{ + type_register_static(&aspeed_gpio_info); + type_register_static(&aspeed_gpio_ast2400_info); + type_register_static(&aspeed_gpio_ast2500_info); +} + +type_init(aspeed_gpio_register_types); diff --git a/include/hw/gpio/aspeed_gpio.h b/include/hw/gpio/aspeed_gpio.h new file mode 100644 index 0000000000..a2deac046a --- /dev/null +++ b/include/hw/gpio/aspeed_gpio.h @@ -0,0 +1,100 @@ +/* + * ASPEED GPIO Controller + * + * Copyright (C) 2017-2018 IBM Corp. + * + * This code is licensed under the GPL version 2 or later. See + * the COPYING file in the top-level directory. + */ + +#ifndef ASPEED_GPIO_H +#define ASPEED_GPIO_H + +#include "hw/sysbus.h" + +#define TYPE_ASPEED_GPIO "aspeed.gpio" +#define ASPEED_GPIO(obj) OBJECT_CHECK(AspeedGPIOState, (obj), TYPE_ASPEED_GPIO) +#define ASPEED_GPIO_CLASS(klass) \ + OBJECT_CLASS_CHECK(AspeedGPIOClass, (klass), TYPE_ASPEED_GPIO) +#define ASPEED_GPIO_GET_CLASS(obj) \ + OBJECT_GET_CLASS(AspeedGPIOClass, (obj), TYPE_ASPEED_GPIO) + +#define ASPEED_GPIO_MAX_NR_SETS 8 +#define ASPEED_REGS_PER_BANK 14 +#define ASPEED_GPIO_MAX_NR_REGS (ASPEED_REGS_PER_BANK * ASPEED_GPIO_MAX_NR_SETS) +#define ASPEED_GPIO_NR_PINS 228 +#define ASPEED_GROUPS_PER_SET 4 +#define ASPEED_GPIO_NR_DEBOUNCE_REGS 3 +#define ASPEED_CHARS_PER_GROUP_LABEL 4 + +typedef struct GPIOSets GPIOSets; + +typedef struct GPIOSetProperties { + uint32_t input; + uint32_t output; + char group_label[ASPEED_GROUPS_PER_SET][ASPEED_CHARS_PER_GROUP_LABEL]; +} GPIOSetProperties; + +enum GPIORegType { + gpio_not_a_reg, + gpio_reg_data_value, + gpio_reg_direction, + gpio_reg_int_enable, + gpio_reg_int_sens_0, + gpio_reg_int_sens_1, + gpio_reg_int_sens_2, + gpio_reg_int_status, + gpio_reg_reset_tolerant, + gpio_reg_debounce_1, + gpio_reg_debounce_2, + gpio_reg_cmd_source_0, + gpio_reg_cmd_source_1, + gpio_reg_data_read, + gpio_reg_input_mask, +}; + +typedef struct AspeedGPIOReg { + uint16_t set_idx; + enum GPIORegType type; + } AspeedGPIOReg; + +typedef struct AspeedGPIOClass { + SysBusDevice parent_obj; + const GPIOSetProperties *props; + uint32_t nr_gpio_pins; + uint32_t nr_gpio_sets; + uint32_t gap; + const AspeedGPIOReg *reg_table; +} AspeedGPIOClass; + +typedef struct AspeedGPIOState { + /* <private> */ + SysBusDevice parent; + + /*< public >*/ + MemoryRegion iomem; + int pending; + qemu_irq irq; + qemu_irq gpios[ASPEED_GPIO_NR_PINS]; + +/* Parallel GPIO Registers */ + uint32_t debounce_regs[ASPEED_GPIO_NR_DEBOUNCE_REGS]; + struct GPIOSets { + uint32_t data_value; /* Reflects pin values */ + uint32_t data_read; /* Contains last value written to data value */ + uint32_t direction; + uint32_t int_enable; + uint32_t int_sens_0; + uint32_t int_sens_1; + uint32_t int_sens_2; + uint32_t int_status; + uint32_t reset_tol; + uint32_t cmd_source_0; + uint32_t cmd_source_1; + uint32_t debounce_1; + uint32_t debounce_2; + uint32_t input_mask; + } sets[ASPEED_GPIO_MAX_NR_SETS]; +} AspeedGPIOState; + +#endif /* _ASPEED_GPIO_H_ */ |