projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 95244306 PP |
1 | /* |
| 2 | * Copyright (C) 2012 Paul Parsons <[email protected]> | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License version 2 as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | */ | |
| 8 | ||
| 9 | #include <linux/module.h> | |
| 10 | #include <linux/platform_device.h> | |
| 11 | #include <linux/err.h> | |
| 12 | #include <linux/gpio.h> | |
| 13 | #include <linux/irq.h> | |
| 14 | ||
| 15 | #include <asm/mach-types.h> | |
| 16 | #include <mach/hx4700.h> | |
| 17 | ||
| 18 | #include "soc_common.h" | |
| 19 | ||
| 20 | static struct gpio gpios[] = { | |
| 21 | { GPIO114_HX4700_CF_RESET, GPIOF_OUT_INIT_LOW, "CF reset" }, | |
| 22 | { EGPIO4_CF_3V3_ON, GPIOF_OUT_INIT_LOW, "CF 3.3V enable" }, | |
| 23 | }; | |
| 24 | ||
| 25 | static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | |
| 26 | { | |
| 27 | int ret; | |
| 28 | ||
| 29 | ret = gpio_request_array(gpios, ARRAY_SIZE(gpios)); | |
| 30 | if (ret) | |
| 31 | goto out; | |
| 32 | ||
| 33 | /* | |
| 34 | * IRQ type must be set before soc_pcmcia_hw_init() calls request_irq(). | |
| 35 | * The asic3 default IRQ type is level trigger low level detect, exactly | |
| 36 | * the the signal present on GPIOD4_CF_nCD when a CF card is inserted. | |
| 37 | * If the IRQ type is not changed, the asic3 interrupt handler will loop | |
| 38 | * repeatedly because it is unable to clear the level trigger interrupt. | |
| 39 | */ | |
| 40 | irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH); | |
| 41 | ||
| 42 | skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD; | |
| 43 | skt->stat[SOC_STAT_CD].name = "PCMCIA CD"; | |
| 44 | skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB; | |
| 45 | skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; | |
| 46 | ||
| 47 | out: | |
| 48 | return ret; | |
| 49 | } | |
| 50 | ||
| 51 | static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
| 52 | { | |
| 53 | gpio_free_array(gpios, ARRAY_SIZE(gpios)); | |
| 54 | } | |
| 55 | ||
| 56 | static void hx4700_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
| 57 | struct pcmcia_state *state) | |
| 58 | { | |
| 59 | state->vs_3v = 1; | |
| 60 | state->vs_Xv = 0; | |
| 61 | } | |
| 62 | ||
| 63 | static int hx4700_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
| 64 | const socket_state_t *state) | |
| 65 | { | |
| 66 | switch (state->Vcc) { | |
| 67 | case 0: | |
| 68 | gpio_set_value(EGPIO4_CF_3V3_ON, 0); | |
| 69 | break; | |
| 70 | case 33: | |
| 71 | gpio_set_value(EGPIO4_CF_3V3_ON, 1); | |
| 72 | break; | |
| 73 | default: | |
| 74 | printk(KERN_ERR "pcmcia: Unsupported Vcc: %d\n", state->Vcc); | |
| 75 | return -EINVAL; | |
| 76 | } | |
| 77 | ||
| 78 | gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0); | |
| 79 | ||
| 80 | return 0; | |
| 81 | } | |
| 82 | ||
| 83 | static struct pcmcia_low_level hx4700_pcmcia_ops = { | |
| 84 | .owner = THIS_MODULE, | |
| 85 | .nr = 1, | |
| 86 | .hw_init = hx4700_pcmcia_hw_init, | |
| 87 | .hw_shutdown = hx4700_pcmcia_hw_shutdown, | |
| 88 | .socket_state = hx4700_pcmcia_socket_state, | |
| 89 | .configure_socket = hx4700_pcmcia_configure_socket, | |
| 90 | }; | |
| 91 | ||
| 92 | static struct platform_device *hx4700_pcmcia_device; | |
| 93 | ||
| 94 | static int __init hx4700_pcmcia_init(void) | |
| 95 | { | |
| 96 | struct platform_device *pdev; | |
| 97 | ||
| 98 | if (!machine_is_h4700()) | |
| 99 | return -ENODEV; | |
| 100 | ||
| 101 | pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1, | |
| 102 | &hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops)); | |
| 103 | if (IS_ERR(pdev)) | |
| 104 | return PTR_ERR(pdev); | |
| 105 | ||
| 106 | hx4700_pcmcia_device = pdev; | |
| 107 | ||
| 108 | return 0; | |
| 109 | } | |
| 110 | ||
| 111 | static void __exit hx4700_pcmcia_exit(void) | |
| 112 | { | |
| 113 | platform_device_unregister(hx4700_pcmcia_device); | |
| 114 | } | |
| 115 | ||
| 116 | module_init(hx4700_pcmcia_init); | |
| 117 | module_exit(hx4700_pcmcia_exit); | |
| 118 | ||
| 119 | MODULE_AUTHOR("Paul Parsons <[email protected]>"); | |
| 120 | MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver"); | |
| 121 | MODULE_LICENSE("GPL"); |