| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * linux/arch/arm/mach-omap2/gpmc-smsc911x.c |
| 3 | * |
| 4 | * Copyright (C) 2009 Li-Pro.Net |
| 5 | * Stephan Linz <linz@li-pro.net> |
| 6 | * |
| 7 | * Modified from linux/arch/arm/mach-omap2/gpmc-smc91x.c |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/platform_device.h> |
| 17 | #include <linux/gpio.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/io.h> |
| 21 | #include <linux/smsc911x.h> |
| 22 | |
| 23 | #include "gpmc.h" |
| 24 | #include "gpmc-smsc911x.h" |
| 25 | |
| 26 | static struct resource gpmc_smsc911x_resources[] = { |
| 27 | [0] = { |
| 28 | .flags = IORESOURCE_MEM, |
| 29 | }, |
| 30 | [1] = { |
| 31 | .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL, |
| 32 | }, |
| 33 | }; |
| 34 | |
| 35 | static struct smsc911x_platform_config gpmc_smsc911x_config = { |
| 36 | .phy_interface = PHY_INTERFACE_MODE_MII, |
| 37 | .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW, |
| 38 | .irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN, |
| 39 | }; |
| 40 | |
| 41 | /* |
| 42 | * Initialize smsc911x device connected to the GPMC. Note that we |
| 43 | * assume that pin multiplexing is done in the board-*.c file, |
| 44 | * or in the bootloader. |
| 45 | */ |
| 46 | void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *gpmc_cfg) |
| 47 | { |
| 48 | struct platform_device *pdev; |
| 49 | unsigned long cs_mem_base; |
| 50 | int ret; |
| 51 | |
| 52 | if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) { |
| 53 | pr_err("Failed to request GPMC mem region\n"); |
| 54 | return; |
| 55 | } |
| 56 | |
| 57 | gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0; |
| 58 | gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff; |
| 59 | |
| 60 | if (gpio_request_one(gpmc_cfg->gpio_irq, GPIOF_IN, "smsc911x irq")) { |
| 61 | pr_err("Failed to request IRQ GPIO%d\n", gpmc_cfg->gpio_irq); |
| 62 | goto free1; |
| 63 | } |
| 64 | |
| 65 | gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq); |
| 66 | |
| 67 | if (gpio_is_valid(gpmc_cfg->gpio_reset)) { |
| 68 | ret = gpio_request_one(gpmc_cfg->gpio_reset, |
| 69 | GPIOF_OUT_INIT_HIGH, "smsc911x reset"); |
| 70 | if (ret) { |
| 71 | pr_err("Failed to request reset GPIO%d\n", |
| 72 | gpmc_cfg->gpio_reset); |
| 73 | goto free2; |
| 74 | } |
| 75 | |
| 76 | gpio_set_value(gpmc_cfg->gpio_reset, 0); |
| 77 | msleep(100); |
| 78 | gpio_set_value(gpmc_cfg->gpio_reset, 1); |
| 79 | } |
| 80 | |
| 81 | gpmc_smsc911x_config.flags = gpmc_cfg->flags ? : SMSC911X_USE_16BIT; |
| 82 | |
| 83 | pdev = platform_device_register_resndata(NULL, "smsc911x", gpmc_cfg->id, |
| 84 | gpmc_smsc911x_resources, ARRAY_SIZE(gpmc_smsc911x_resources), |
| 85 | &gpmc_smsc911x_config, sizeof(gpmc_smsc911x_config)); |
| 86 | if (IS_ERR(pdev)) { |
| 87 | pr_err("Unable to register platform device\n"); |
| 88 | gpio_free(gpmc_cfg->gpio_reset); |
| 89 | goto free2; |
| 90 | } |
| 91 | |
| 92 | return; |
| 93 | |
| 94 | free2: |
| 95 | gpio_free(gpmc_cfg->gpio_irq); |
| 96 | free1: |
| 97 | gpmc_cs_free(gpmc_cfg->cs); |
| 98 | |
| 99 | pr_err("Could not initialize smsc911x device\n"); |
| 100 | } |