1/* 2 * linux/drivers/pcmcia/pxa2xx_stargate2.c 3 * 4 * Stargate 2 PCMCIA specific routines. 5 * 6 * Created: December 6, 2005 7 * Author: Ed C. Epp 8 * Copyright: Intel Corp 2005 9 * Jonathan Cameron <jic23@cam.ac.uk> 2009 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16#include <linux/module.h> 17#include <linux/init.h> 18#include <linux/kernel.h> 19#include <linux/interrupt.h> 20#include <linux/delay.h> 21#include <linux/platform_device.h> 22#include <linux/gpio.h> 23 24#include <pcmcia/ss.h> 25 26#include <asm/irq.h> 27#include <asm/mach-types.h> 28 29#include "soc_common.h" 30 31#define SG2_S0_POWER_CTL 108 32#define SG2_S0_GPIO_RESET 82 33#define SG2_S0_GPIO_DETECT 53 34#define SG2_S0_GPIO_READY 81 35 36static struct pcmcia_irqs irqs[] = { 37 {.sock = 0, .str = "PCMCIA0 CD" }, 38}; 39 40static struct gpio sg2_pcmcia_gpios[] = { 41 { SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" }, 42 { SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" }, 43}; 44 45static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 46{ 47 skt->socket.pci_irq = gpio_to_irq(SG2_S0_GPIO_READY); 48 irqs[0].irq = gpio_to_irq(SG2_S0_GPIO_DETECT); 49 50 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); 51} 52 53static void sg2_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) 54{ 55 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); 56} 57 58static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt, 59 struct pcmcia_state *state) 60{ 61 state->detect = !gpio_get_value(SG2_S0_GPIO_DETECT); 62 state->ready = !!gpio_get_value(SG2_S0_GPIO_READY); 63 state->bvd1 = 0; /* not available - battery detect on card */ 64 state->bvd2 = 0; /* not available */ 65 state->vs_3v = 1; /* not available - voltage detect for card */ 66 state->vs_Xv = 0; /* not available */ 67 state->wrprot = 0; /* not available - write protect */ 68} 69 70static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 71 const socket_state_t *state) 72{ 73 /* Enable card power */ 74 switch (state->Vcc) { 75 case 0: 76 /* sets power ctl register high */ 77 gpio_set_value(SG2_S0_POWER_CTL, 1); 78 break; 79 case 33: 80 case 50: 81 /* sets power control register low (clear) */ 82 gpio_set_value(SG2_S0_POWER_CTL, 0); 83 msleep(100); 84 break; 85 default: 86 pr_err("%s(): bad Vcc %u\n", 87 __func__, state->Vcc); 88 return -1; 89 } 90 91 /* reset */ 92 gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET)); 93 94 return 0; 95} 96 97static void sg2_pcmcia_socket_init(struct soc_pcmcia_socket *skt) 98{ 99 soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs)); 100} 101 102static void sg2_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) 103{ 104 soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs)); 105} 106 107static struct pcmcia_low_level sg2_pcmcia_ops __initdata = { 108 .owner = THIS_MODULE, 109 .hw_init = sg2_pcmcia_hw_init, 110 .hw_shutdown = sg2_pcmcia_hw_shutdown, 111 .socket_state = sg2_pcmcia_socket_state, 112 .configure_socket = sg2_pcmcia_configure_socket, 113 .socket_init = sg2_pcmcia_socket_init, 114 .socket_suspend = sg2_pcmcia_socket_suspend, 115 .nr = 1, 116}; 117 118static struct platform_device *sg2_pcmcia_device; 119 120static int __init sg2_pcmcia_init(void) 121{ 122 int ret; 123 124 if (!machine_is_stargate2()) 125 return -ENODEV; 126 127 sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); 128 if (!sg2_pcmcia_device) 129 return -ENOMEM; 130 131 ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); 132 if (ret) 133 goto error_put_platform_device; 134 135 ret = platform_device_add_data(sg2_pcmcia_device, 136 &sg2_pcmcia_ops, 137 sizeof(sg2_pcmcia_ops)); 138 if (ret) 139 goto error_free_gpios; 140 141 ret = platform_device_add(sg2_pcmcia_device); 142 if (ret) 143 goto error_free_gpios; 144 145 return 0; 146error_free_gpios: 147 gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); 148error_put_platform_device: 149 platform_device_put(sg2_pcmcia_device); 150 151 return ret; 152} 153 154static void __exit sg2_pcmcia_exit(void) 155{ 156 platform_device_unregister(sg2_pcmcia_device); 157 gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); 158} 159 160fs_initcall(sg2_pcmcia_init); 161module_exit(sg2_pcmcia_exit); 162 163MODULE_LICENSE("GPL"); 164MODULE_ALIAS("platform:pxa2xx-pcmcia"); 165