+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright (C) 2010 Jason Wang <jason77.wang@gmail.com>
- */
-
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/module.h>
-#include <linux/smsc911x.h>
-#include <linux/regulator/machine.h>
-#include <linux/regulator/fixed.h>
-#include "3ds_debugboard.h"
-#include "hardware.h"
-
-/* LAN9217 ethernet base address */
-#define LAN9217_BASE_ADDR(n) (n + 0x0)
-/* External UART */
-#define UARTA_BASE_ADDR(n) (n + 0x8000)
-#define UARTB_BASE_ADDR(n) (n + 0x10000)
-
-#define BOARD_IO_ADDR(n) (n + 0x20000)
-/* LED switchs */
-#define LED_SWITCH_REG 0x00
-/* buttons */
-#define SWITCH_BUTTONS_REG 0x08
-/* status, interrupt */
-#define INTR_STATUS_REG 0x10
-#define INTR_MASK_REG 0x38
-#define INTR_RESET_REG 0x20
-/* magic word for debug CPLD */
-#define MAGIC_NUMBER1_REG 0x40
-#define MAGIC_NUMBER2_REG 0x48
-/* CPLD code version */
-#define CPLD_CODE_VER_REG 0x50
-/* magic word for debug CPLD */
-#define MAGIC_NUMBER3_REG 0x58
-/* module reset register*/
-#define MODULE_RESET_REG 0x60
-/* CPU ID and Personality ID */
-#define MCU_BOARD_ID_REG 0x68
-
-#define MXC_MAX_EXP_IO_LINES 16
-
-/* interrupts like external uart , external ethernet etc*/
-#define EXPIO_INT_ENET 0
-#define EXPIO_INT_XUART_A 1
-#define EXPIO_INT_XUART_B 2
-#define EXPIO_INT_BUTTON_A 3
-#define EXPIO_INT_BUTTON_B 4
-
-static void __iomem *brd_io;
-static struct irq_domain *domain;
-
-static struct resource smsc911x_resources[] = {
- {
- .flags = IORESOURCE_MEM,
- } , {
- .flags = IORESOURCE_IRQ,
- },
-};
-
-static struct smsc911x_platform_config smsc911x_config = {
- .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
- .flags = SMSC911X_USE_32BIT | SMSC911X_FORCE_INTERNAL_PHY,
-};
-
-static struct platform_device smsc_lan9217_device = {
- .name = "smsc911x",
- .id = -1,
- .dev = {
- .platform_data = &smsc911x_config,
- },
- .num_resources = ARRAY_SIZE(smsc911x_resources),
- .resource = smsc911x_resources,
-};
-
-static void mxc_expio_irq_handler(struct irq_desc *desc)
-{
- u32 imr_val;
- u32 int_valid;
- u32 expio_irq;
-
- /* irq = gpio irq number */
- desc->irq_data.chip->irq_mask(&desc->irq_data);
-
- imr_val = imx_readw(brd_io + INTR_MASK_REG);
- int_valid = imx_readw(brd_io + INTR_STATUS_REG) & ~imr_val;
-
- expio_irq = 0;
- for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
- if ((int_valid & 1) == 0)
- continue;
- generic_handle_irq(irq_find_mapping(domain, expio_irq));
- }
-
- desc->irq_data.chip->irq_ack(&desc->irq_data);
- desc->irq_data.chip->irq_unmask(&desc->irq_data);
-}
-
-/*
- * Disable an expio pin's interrupt by setting the bit in the imr.
- * Irq is an expio virtual irq number
- */
-static void expio_mask_irq(struct irq_data *d)
-{
- u16 reg;
- u32 expio = d->hwirq;
-
- reg = imx_readw(brd_io + INTR_MASK_REG);
- reg |= (1 << expio);
- imx_writew(reg, brd_io + INTR_MASK_REG);
-}
-
-static void expio_ack_irq(struct irq_data *d)
-{
- u32 expio = d->hwirq;
-
- imx_writew(1 << expio, brd_io + INTR_RESET_REG);
- imx_writew(0, brd_io + INTR_RESET_REG);
- expio_mask_irq(d);
-}
-
-static void expio_unmask_irq(struct irq_data *d)
-{
- u16 reg;
- u32 expio = d->hwirq;
-
- reg = imx_readw(brd_io + INTR_MASK_REG);
- reg &= ~(1 << expio);
- imx_writew(reg, brd_io + INTR_MASK_REG);
-}
-
-static struct irq_chip expio_irq_chip = {
- .irq_ack = expio_ack_irq,
- .irq_mask = expio_mask_irq,
- .irq_unmask = expio_unmask_irq,
-};
-
-static struct regulator_consumer_supply dummy_supplies[] = {
- REGULATOR_SUPPLY("vdd33a", "smsc911x"),
- REGULATOR_SUPPLY("vddvario", "smsc911x"),
-};
-
-int __init mxc_expio_init(u32 base, u32 intr_gpio)
-{
- u32 p_irq = gpio_to_irq(intr_gpio);
- int irq_base;
- int i;
-
- brd_io = ioremap(BOARD_IO_ADDR(base), SZ_4K);
- if (brd_io == NULL)
- return -ENOMEM;
-
- if ((imx_readw(brd_io + MAGIC_NUMBER1_REG) != 0xAAAA) ||
- (imx_readw(brd_io + MAGIC_NUMBER2_REG) != 0x5555) ||
- (imx_readw(brd_io + MAGIC_NUMBER3_REG) != 0xCAFE)) {
- pr_info("3-Stack Debug board not detected\n");
- iounmap(brd_io);
- brd_io = NULL;
- return -ENODEV;
- }
-
- pr_info("3-Stack Debug board detected, rev = 0x%04X\n",
- readw(brd_io + CPLD_CODE_VER_REG));
-
- /*
- * Configure INT line as GPIO input
- */
- gpio_request(intr_gpio, "expio_pirq");
- gpio_direction_input(intr_gpio);
-
- /* disable the interrupt and clear the status */
- imx_writew(0, brd_io + INTR_MASK_REG);
- imx_writew(0xFFFF, brd_io + INTR_RESET_REG);
- imx_writew(0, brd_io + INTR_RESET_REG);
- imx_writew(0x1F, brd_io + INTR_MASK_REG);
-
- irq_base = irq_alloc_descs(-1, 0, MXC_MAX_EXP_IO_LINES, numa_node_id());
- WARN_ON(irq_base < 0);
-
- domain = irq_domain_add_legacy(NULL, MXC_MAX_EXP_IO_LINES, irq_base, 0,
- &irq_domain_simple_ops, NULL);
- WARN_ON(!domain);
-
- for (i = irq_base; i < irq_base + MXC_MAX_EXP_IO_LINES; i++) {
- irq_set_chip_and_handler(i, &expio_irq_chip, handle_level_irq);
- irq_clear_status_flags(i, IRQ_NOREQUEST);
- }
- irq_set_irq_type(p_irq, IRQF_TRIGGER_LOW);
- irq_set_chained_handler(p_irq, mxc_expio_irq_handler);
-
- /* Register Lan device on the debugboard */
- regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
-
- smsc911x_resources[0].start = LAN9217_BASE_ADDR(base);
- smsc911x_resources[0].end = LAN9217_BASE_ADDR(base) + 0x100 - 1;
- smsc911x_resources[1].start = irq_find_mapping(domain, EXPIO_INT_ENET);
- smsc911x_resources[1].end = irq_find_mapping(domain, EXPIO_INT_ENET);
- platform_device_register(&smsc_lan9217_device);
-
- return 0;
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff