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![Johannes Berg](/assets/img/avatar_default.png)
Instead of __raw_*, define imx_* to *_relaxed and use those. Using imx_* was requested by Arnd because *_relaxed tends to indicate that the code was carefully reviewed to not require any synchronisation and otherwise be safe, which isn't the case here with the automatic conversion. The conversion itself was done using the following spatch (since that automatically adjusts the coding style unlike a simple search&replace). @@ expression E1, E2; @@ -__raw_writel(E1, E2) +imx_writel(E1, E2) @@ expression E1, E2; @@ -__raw_writew(E1, E2) +imx_writew(E1, E2) @@ expression E1; @@ -__raw_readl(E1) +imx_readl(E1) @@ expression E1; @@ -__raw_readw(E1) +imx_readw(E1) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
213 lines
5.6 KiB
C
213 lines
5.6 KiB
C
/*
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* Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright (C) 2010 Jason Wang <jason77.wang@gmail.com>
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <linux/smsc911x.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/fixed.h>
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#include "hardware.h"
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/* LAN9217 ethernet base address */
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#define LAN9217_BASE_ADDR(n) (n + 0x0)
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/* External UART */
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#define UARTA_BASE_ADDR(n) (n + 0x8000)
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#define UARTB_BASE_ADDR(n) (n + 0x10000)
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#define BOARD_IO_ADDR(n) (n + 0x20000)
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/* LED switchs */
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#define LED_SWITCH_REG 0x00
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/* buttons */
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#define SWITCH_BUTTONS_REG 0x08
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/* status, interrupt */
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#define INTR_STATUS_REG 0x10
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#define INTR_MASK_REG 0x38
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#define INTR_RESET_REG 0x20
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/* magic word for debug CPLD */
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#define MAGIC_NUMBER1_REG 0x40
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#define MAGIC_NUMBER2_REG 0x48
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/* CPLD code version */
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#define CPLD_CODE_VER_REG 0x50
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/* magic word for debug CPLD */
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#define MAGIC_NUMBER3_REG 0x58
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/* module reset register*/
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#define MODULE_RESET_REG 0x60
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/* CPU ID and Personality ID */
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#define MCU_BOARD_ID_REG 0x68
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#define MXC_MAX_EXP_IO_LINES 16
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/* interrupts like external uart , external ethernet etc*/
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#define EXPIO_INT_ENET 0
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#define EXPIO_INT_XUART_A 1
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#define EXPIO_INT_XUART_B 2
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#define EXPIO_INT_BUTTON_A 3
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#define EXPIO_INT_BUTTON_B 4
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static void __iomem *brd_io;
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static struct irq_domain *domain;
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static struct resource smsc911x_resources[] = {
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{
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.flags = IORESOURCE_MEM,
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} , {
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct smsc911x_platform_config smsc911x_config = {
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.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
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.flags = SMSC911X_USE_32BIT | SMSC911X_FORCE_INTERNAL_PHY,
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};
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static struct platform_device smsc_lan9217_device = {
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.name = "smsc911x",
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.id = -1,
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.dev = {
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.platform_data = &smsc911x_config,
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},
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.num_resources = ARRAY_SIZE(smsc911x_resources),
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.resource = smsc911x_resources,
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};
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static void mxc_expio_irq_handler(struct irq_desc *desc)
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{
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u32 imr_val;
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u32 int_valid;
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u32 expio_irq;
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/* irq = gpio irq number */
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desc->irq_data.chip->irq_mask(&desc->irq_data);
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imr_val = imx_readw(brd_io + INTR_MASK_REG);
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int_valid = imx_readw(brd_io + INTR_STATUS_REG) & ~imr_val;
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expio_irq = 0;
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for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
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if ((int_valid & 1) == 0)
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continue;
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generic_handle_irq(irq_find_mapping(domain, expio_irq));
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}
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desc->irq_data.chip->irq_ack(&desc->irq_data);
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desc->irq_data.chip->irq_unmask(&desc->irq_data);
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}
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/*
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* Disable an expio pin's interrupt by setting the bit in the imr.
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* Irq is an expio virtual irq number
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*/
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static void expio_mask_irq(struct irq_data *d)
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{
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u16 reg;
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u32 expio = d->hwirq;
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reg = imx_readw(brd_io + INTR_MASK_REG);
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reg |= (1 << expio);
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imx_writew(reg, brd_io + INTR_MASK_REG);
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}
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static void expio_ack_irq(struct irq_data *d)
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{
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u32 expio = d->hwirq;
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imx_writew(1 << expio, brd_io + INTR_RESET_REG);
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imx_writew(0, brd_io + INTR_RESET_REG);
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expio_mask_irq(d);
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}
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static void expio_unmask_irq(struct irq_data *d)
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{
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u16 reg;
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u32 expio = d->hwirq;
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reg = imx_readw(brd_io + INTR_MASK_REG);
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reg &= ~(1 << expio);
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imx_writew(reg, brd_io + INTR_MASK_REG);
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}
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static struct irq_chip expio_irq_chip = {
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.irq_ack = expio_ack_irq,
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.irq_mask = expio_mask_irq,
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.irq_unmask = expio_unmask_irq,
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};
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static struct regulator_consumer_supply dummy_supplies[] = {
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REGULATOR_SUPPLY("vdd33a", "smsc911x"),
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REGULATOR_SUPPLY("vddvario", "smsc911x"),
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};
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int __init mxc_expio_init(u32 base, u32 intr_gpio)
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{
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u32 p_irq = gpio_to_irq(intr_gpio);
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int irq_base;
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int i;
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brd_io = ioremap(BOARD_IO_ADDR(base), SZ_4K);
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if (brd_io == NULL)
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return -ENOMEM;
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if ((imx_readw(brd_io + MAGIC_NUMBER1_REG) != 0xAAAA) ||
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(imx_readw(brd_io + MAGIC_NUMBER2_REG) != 0x5555) ||
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(imx_readw(brd_io + MAGIC_NUMBER3_REG) != 0xCAFE)) {
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pr_info("3-Stack Debug board not detected\n");
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iounmap(brd_io);
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brd_io = NULL;
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return -ENODEV;
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}
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pr_info("3-Stack Debug board detected, rev = 0x%04X\n",
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readw(brd_io + CPLD_CODE_VER_REG));
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/*
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* Configure INT line as GPIO input
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*/
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gpio_request(intr_gpio, "expio_pirq");
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gpio_direction_input(intr_gpio);
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/* disable the interrupt and clear the status */
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imx_writew(0, brd_io + INTR_MASK_REG);
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imx_writew(0xFFFF, brd_io + INTR_RESET_REG);
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imx_writew(0, brd_io + INTR_RESET_REG);
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imx_writew(0x1F, brd_io + INTR_MASK_REG);
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irq_base = irq_alloc_descs(-1, 0, MXC_MAX_EXP_IO_LINES, numa_node_id());
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WARN_ON(irq_base < 0);
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domain = irq_domain_add_legacy(NULL, MXC_MAX_EXP_IO_LINES, irq_base, 0,
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&irq_domain_simple_ops, NULL);
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WARN_ON(!domain);
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for (i = irq_base; i < irq_base + MXC_MAX_EXP_IO_LINES; i++) {
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irq_set_chip_and_handler(i, &expio_irq_chip, handle_level_irq);
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irq_clear_status_flags(i, IRQ_NOREQUEST);
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}
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irq_set_irq_type(p_irq, IRQF_TRIGGER_LOW);
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irq_set_chained_handler(p_irq, mxc_expio_irq_handler);
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/* Register Lan device on the debugboard */
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regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
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smsc911x_resources[0].start = LAN9217_BASE_ADDR(base);
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smsc911x_resources[0].end = LAN9217_BASE_ADDR(base) + 0x100 - 1;
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smsc911x_resources[1].start = irq_find_mapping(domain, EXPIO_INT_ENET);
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smsc911x_resources[1].end = irq_find_mapping(domain, EXPIO_INT_ENET);
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platform_device_register(&smsc_lan9217_device);
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return 0;
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}
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