Lines Matching +full:sgpio +full:- +full:gpio
1 // SPDX-License-Identifier: GPL-2.0-or-later
10 #include <linux/gpio/driver.h>
21 * MAX_NR_HW_GPIO represents the number of actual hardware-supported GPIOs (ie,
22 * slots within the clocked serial GPIO data). Since each HW GPIO is both an
55 * Note: The "value" register returns the input value when the GPIO is
58 * The "rdata" register returns the output value when the GPIO is
99 static void __iomem *bank_reg(struct aspeed_sgpio *gpio, in bank_reg() argument
105 return gpio->base + bank->val_regs + GPIO_VAL_VALUE; in bank_reg()
107 return gpio->base + bank->rdata_reg; in bank_reg()
109 return gpio->base + bank->irq_regs + GPIO_IRQ_ENABLE; in bank_reg()
111 return gpio->base + bank->irq_regs + GPIO_IRQ_TYPE0; in bank_reg()
113 return gpio->base + bank->irq_regs + GPIO_IRQ_TYPE1; in bank_reg()
115 return gpio->base + bank->irq_regs + GPIO_IRQ_TYPE2; in bank_reg()
117 return gpio->base + bank->irq_regs + GPIO_IRQ_STATUS; in bank_reg()
141 struct aspeed_sgpio *sgpio = gpiochip_get_data(gc); in aspeed_sgpio_init_valid_mask() local
142 int n = sgpio->n_sgpio; in aspeed_sgpio_init_valid_mask()
143 int c = SGPIO_OUTPUT_OFFSET - n; in aspeed_sgpio_init_valid_mask()
161 struct aspeed_sgpio *sgpio = gpiochip_get_data(gc); in aspeed_sgpio_irq_init_valid_mask() local
162 int n = sgpio->n_sgpio; in aspeed_sgpio_irq_init_valid_mask()
168 bitmap_clear(valid_mask, n, ngpios - n); in aspeed_sgpio_irq_init_valid_mask()
178 struct aspeed_sgpio *gpio = gpiochip_get_data(gc); in aspeed_sgpio_get() local
184 spin_lock_irqsave(&gpio->lock, flags); in aspeed_sgpio_get()
187 rc = !!(ioread32(bank_reg(gpio, bank, reg)) & GPIO_BIT(offset)); in aspeed_sgpio_get()
189 spin_unlock_irqrestore(&gpio->lock, flags); in aspeed_sgpio_get()
196 struct aspeed_sgpio *gpio = gpiochip_get_data(gc); in sgpio_set_value() local
202 return -EINVAL; in sgpio_set_value()
206 addr_r = bank_reg(gpio, bank, reg_rdata); in sgpio_set_value()
207 addr_w = bank_reg(gpio, bank, reg_val); in sgpio_set_value()
223 struct aspeed_sgpio *gpio = gpiochip_get_data(gc); in aspeed_sgpio_set() local
226 spin_lock_irqsave(&gpio->lock, flags); in aspeed_sgpio_set()
230 spin_unlock_irqrestore(&gpio->lock, flags); in aspeed_sgpio_set()
235 return aspeed_sgpio_is_input(offset) ? 0 : -EINVAL; in aspeed_sgpio_dir_in()
240 struct aspeed_sgpio *gpio = gpiochip_get_data(gc); in aspeed_sgpio_dir_out() local
245 * error-out in sgpio_set_value if this isn't an output GPIO */ in aspeed_sgpio_dir_out()
247 spin_lock_irqsave(&gpio->lock, flags); in aspeed_sgpio_dir_out()
249 spin_unlock_irqrestore(&gpio->lock, flags); in aspeed_sgpio_dir_out()
260 struct aspeed_sgpio **gpio, in irqd_to_aspeed_sgpio_data() argument
270 *gpio = internal; in irqd_to_aspeed_sgpio_data()
278 struct aspeed_sgpio *gpio; in aspeed_sgpio_irq_ack() local
284 irqd_to_aspeed_sgpio_data(d, &gpio, &bank, &bit, &offset); in aspeed_sgpio_irq_ack()
286 status_addr = bank_reg(gpio, bank, reg_irq_status); in aspeed_sgpio_irq_ack()
288 spin_lock_irqsave(&gpio->lock, flags); in aspeed_sgpio_irq_ack()
292 spin_unlock_irqrestore(&gpio->lock, flags); in aspeed_sgpio_irq_ack()
298 struct aspeed_sgpio *gpio; in aspeed_sgpio_irq_set_mask() local
304 irqd_to_aspeed_sgpio_data(d, &gpio, &bank, &bit, &offset); in aspeed_sgpio_irq_set_mask()
305 addr = bank_reg(gpio, bank, reg_irq_enable); in aspeed_sgpio_irq_set_mask()
307 spin_lock_irqsave(&gpio->lock, flags); in aspeed_sgpio_irq_set_mask()
317 spin_unlock_irqrestore(&gpio->lock, flags); in aspeed_sgpio_irq_set_mask()
338 struct aspeed_sgpio *gpio; in aspeed_sgpio_set_type() local
343 irqd_to_aspeed_sgpio_data(d, &gpio, &bank, &bit, &offset); in aspeed_sgpio_set_type()
363 return -EINVAL; in aspeed_sgpio_set_type()
366 spin_lock_irqsave(&gpio->lock, flags); in aspeed_sgpio_set_type()
368 addr = bank_reg(gpio, bank, reg_irq_type0); in aspeed_sgpio_set_type()
373 addr = bank_reg(gpio, bank, reg_irq_type1); in aspeed_sgpio_set_type()
378 addr = bank_reg(gpio, bank, reg_irq_type2); in aspeed_sgpio_set_type()
383 spin_unlock_irqrestore(&gpio->lock, flags); in aspeed_sgpio_set_type()
406 girq = irq_find_mapping(gc->irq.domain, i * 32 + p); in aspeed_sgpio_irq_handler()
416 .name = "aspeed-sgpio",
423 static int aspeed_sgpio_setup_irqs(struct aspeed_sgpio *gpio, in aspeed_sgpio_setup_irqs() argument
434 gpio->irq = rc; in aspeed_sgpio_setup_irqs()
436 /* Disable IRQ and clear Interrupt status registers for all SGPIO Pins. */ in aspeed_sgpio_setup_irqs()
440 iowrite32(0x00000000, bank_reg(gpio, bank, reg_irq_enable)); in aspeed_sgpio_setup_irqs()
442 iowrite32(0xffffffff, bank_reg(gpio, bank, reg_irq_status)); in aspeed_sgpio_setup_irqs()
445 irq = &gpio->chip.irq; in aspeed_sgpio_setup_irqs()
446 irq->chip = &aspeed_sgpio_irqchip; in aspeed_sgpio_setup_irqs()
447 irq->init_valid_mask = aspeed_sgpio_irq_init_valid_mask; in aspeed_sgpio_setup_irqs()
448 irq->handler = handle_bad_irq; in aspeed_sgpio_setup_irqs()
449 irq->default_type = IRQ_TYPE_NONE; in aspeed_sgpio_setup_irqs()
450 irq->parent_handler = aspeed_sgpio_irq_handler; in aspeed_sgpio_setup_irqs()
451 irq->parent_handler_data = gpio; in aspeed_sgpio_setup_irqs()
452 irq->parents = &gpio->irq; in aspeed_sgpio_setup_irqs()
453 irq->num_parents = 1; in aspeed_sgpio_setup_irqs()
458 /* set falling or level-low irq */ in aspeed_sgpio_setup_irqs()
459 iowrite32(0x00000000, bank_reg(gpio, bank, reg_irq_type0)); in aspeed_sgpio_setup_irqs()
461 iowrite32(0x00000000, bank_reg(gpio, bank, reg_irq_type1)); in aspeed_sgpio_setup_irqs()
463 iowrite32(0x00000000, bank_reg(gpio, bank, reg_irq_type2)); in aspeed_sgpio_setup_irqs()
470 { .compatible = "aspeed,ast2400-sgpio" },
471 { .compatible = "aspeed,ast2500-sgpio" },
479 struct aspeed_sgpio *gpio; in aspeed_sgpio_probe() local
484 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); in aspeed_sgpio_probe()
485 if (!gpio) in aspeed_sgpio_probe()
486 return -ENOMEM; in aspeed_sgpio_probe()
488 gpio->base = devm_platform_ioremap_resource(pdev, 0); in aspeed_sgpio_probe()
489 if (IS_ERR(gpio->base)) in aspeed_sgpio_probe()
490 return PTR_ERR(gpio->base); in aspeed_sgpio_probe()
492 rc = of_property_read_u32(pdev->dev.of_node, "ngpios", &nr_gpios); in aspeed_sgpio_probe()
494 dev_err(&pdev->dev, "Could not read ngpios property\n"); in aspeed_sgpio_probe()
495 return -EINVAL; in aspeed_sgpio_probe()
497 dev_err(&pdev->dev, "Number of GPIOs exceeds the maximum of %d: %d\n", in aspeed_sgpio_probe()
499 return -EINVAL; in aspeed_sgpio_probe()
501 gpio->n_sgpio = nr_gpios; in aspeed_sgpio_probe()
503 rc = of_property_read_u32(pdev->dev.of_node, "bus-frequency", &sgpio_freq); in aspeed_sgpio_probe()
505 dev_err(&pdev->dev, "Could not read bus-frequency property\n"); in aspeed_sgpio_probe()
506 return -EINVAL; in aspeed_sgpio_probe()
509 gpio->pclk = devm_clk_get(&pdev->dev, NULL); in aspeed_sgpio_probe()
510 if (IS_ERR(gpio->pclk)) { in aspeed_sgpio_probe()
511 dev_err(&pdev->dev, "devm_clk_get failed\n"); in aspeed_sgpio_probe()
512 return PTR_ERR(gpio->pclk); in aspeed_sgpio_probe()
515 apb_freq = clk_get_rate(gpio->pclk); in aspeed_sgpio_probe()
519 * SGPIO period = 1/PCLK * 2 * (GPIO254[31:16] + 1) in aspeed_sgpio_probe()
524 * GPIO254[31:16] = PCLK / (frequency * 2) - 1 in aspeed_sgpio_probe()
527 return -EINVAL; in aspeed_sgpio_probe()
529 sgpio_clk_div = (apb_freq / (sgpio_freq * 2)) - 1; in aspeed_sgpio_probe()
531 if (sgpio_clk_div > (1 << 16) - 1) in aspeed_sgpio_probe()
532 return -EINVAL; in aspeed_sgpio_probe()
537 gpio->base + ASPEED_SGPIO_CTRL); in aspeed_sgpio_probe()
539 spin_lock_init(&gpio->lock); in aspeed_sgpio_probe()
541 gpio->chip.parent = &pdev->dev; in aspeed_sgpio_probe()
542 gpio->chip.ngpio = MAX_NR_HW_SGPIO * 2; in aspeed_sgpio_probe()
543 gpio->chip.init_valid_mask = aspeed_sgpio_init_valid_mask; in aspeed_sgpio_probe()
544 gpio->chip.direction_input = aspeed_sgpio_dir_in; in aspeed_sgpio_probe()
545 gpio->chip.direction_output = aspeed_sgpio_dir_out; in aspeed_sgpio_probe()
546 gpio->chip.get_direction = aspeed_sgpio_get_direction; in aspeed_sgpio_probe()
547 gpio->chip.request = NULL; in aspeed_sgpio_probe()
548 gpio->chip.free = NULL; in aspeed_sgpio_probe()
549 gpio->chip.get = aspeed_sgpio_get; in aspeed_sgpio_probe()
550 gpio->chip.set = aspeed_sgpio_set; in aspeed_sgpio_probe()
551 gpio->chip.set_config = NULL; in aspeed_sgpio_probe()
552 gpio->chip.label = dev_name(&pdev->dev); in aspeed_sgpio_probe()
553 gpio->chip.base = -1; in aspeed_sgpio_probe()
555 aspeed_sgpio_setup_irqs(gpio, pdev); in aspeed_sgpio_probe()
557 rc = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio); in aspeed_sgpio_probe()
572 MODULE_DESCRIPTION("Aspeed Serial GPIO Driver");