Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/pcmcia/pxa/pxa_cm_x255.c |
| 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 | * Compulab Ltd., 2003, 2007, 2008 |
| 9 | * Mike Rapoport <mike@compulab.co.il> |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/gpio.h> |
| 17 | |
| 18 | #include <asm/mach-types.h> |
| 19 | #include <mach/pxa-regs.h> |
| 20 | |
| 21 | #include "soc_common.h" |
| 22 | |
| 23 | #define GPIO_PCMCIA_SKTSEL (54) |
| 24 | #define GPIO_PCMCIA_S0_CD_VALID (16) |
| 25 | #define GPIO_PCMCIA_S1_CD_VALID (17) |
| 26 | #define GPIO_PCMCIA_S0_RDYINT (6) |
| 27 | #define GPIO_PCMCIA_S1_RDYINT (8) |
| 28 | #define GPIO_PCMCIA_RESET (9) |
| 29 | |
| 30 | #define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID) |
| 31 | #define PCMCIA_S1_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S1_CD_VALID) |
| 32 | #define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT) |
| 33 | #define PCMCIA_S1_RDYINT IRQ_GPIO(GPIO_PCMCIA_S1_RDYINT) |
| 34 | |
| 35 | |
| 36 | static struct pcmcia_irqs irqs[] = { |
| 37 | { 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" }, |
| 38 | { 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" }, |
| 39 | }; |
| 40 | |
| 41 | static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 42 | { |
| 43 | int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset"); |
| 44 | if (ret) |
| 45 | return ret; |
| 46 | gpio_direction_output(GPIO_PCMCIA_RESET, 0); |
| 47 | |
| 48 | skt->irq = skt->nr == 0 ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT; |
| 49 | ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); |
| 50 | if (!ret) |
| 51 | gpio_free(GPIO_PCMCIA_RESET); |
| 52 | |
| 53 | return ret; |
| 54 | } |
| 55 | |
| 56 | static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt) |
| 57 | { |
| 58 | soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); |
| 59 | gpio_free(GPIO_PCMCIA_RESET); |
| 60 | } |
| 61 | |
| 62 | |
| 63 | static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
| 64 | struct pcmcia_state *state) |
| 65 | { |
| 66 | int cd = skt->nr ? GPIO_PCMCIA_S1_CD_VALID : GPIO_PCMCIA_S0_CD_VALID; |
| 67 | int rdy = skt->nr ? GPIO_PCMCIA_S0_RDYINT : GPIO_PCMCIA_S1_RDYINT; |
| 68 | |
| 69 | state->detect = !gpio_get_value(cd); |
| 70 | state->ready = !!gpio_get_value(rdy); |
| 71 | state->bvd1 = 1; |
| 72 | state->bvd2 = 1; |
| 73 | state->vs_3v = 0; |
| 74 | state->vs_Xv = 0; |
| 75 | state->wrprot = 0; /* not available */ |
| 76 | } |
| 77 | |
| 78 | |
| 79 | static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 80 | const socket_state_t *state) |
| 81 | { |
| 82 | switch (skt->nr) { |
| 83 | case 0: |
| 84 | if (state->flags & SS_RESET) { |
| 85 | gpio_set_value(GPIO_PCMCIA_SKTSEL, 0); |
| 86 | udelay(1); |
| 87 | gpio_set_value(GPIO_PCMCIA_RESET, 1); |
| 88 | udelay(10); |
| 89 | gpio_set_value(GPIO_PCMCIA_RESET, 0); |
| 90 | } |
| 91 | break; |
| 92 | case 1: |
| 93 | if (state->flags & SS_RESET) { |
| 94 | gpio_set_value(GPIO_PCMCIA_SKTSEL, 1); |
| 95 | udelay(1); |
| 96 | gpio_set_value(GPIO_PCMCIA_RESET, 1); |
| 97 | udelay(10); |
| 98 | gpio_set_value(GPIO_PCMCIA_RESET, 0); |
| 99 | } |
| 100 | break; |
| 101 | } |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | static void cmx255_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
| 107 | { |
| 108 | } |
| 109 | |
| 110 | static void cmx255_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
| 111 | { |
| 112 | } |
| 113 | |
| 114 | |
| 115 | static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = { |
| 116 | .owner = THIS_MODULE, |
| 117 | .hw_init = cmx255_pcmcia_hw_init, |
| 118 | .hw_shutdown = cmx255_pcmcia_shutdown, |
| 119 | .socket_state = cmx255_pcmcia_socket_state, |
| 120 | .configure_socket = cmx255_pcmcia_configure_socket, |
| 121 | .socket_init = cmx255_pcmcia_socket_init, |
| 122 | .socket_suspend = cmx255_pcmcia_socket_suspend, |
| 123 | .nr = 1, |
| 124 | }; |
| 125 | |
| 126 | static struct platform_device *cmx255_pcmcia_device; |
| 127 | |
| 128 | int __init cmx255_pcmcia_init(void) |
| 129 | { |
| 130 | int ret; |
| 131 | |
| 132 | cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
| 133 | |
| 134 | if (!cmx255_pcmcia_device) |
| 135 | return -ENOMEM; |
| 136 | |
| 137 | ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops, |
| 138 | sizeof(cmx255_pcmcia_ops)); |
| 139 | |
| 140 | if (ret == 0) { |
| 141 | printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n"); |
| 142 | ret = platform_device_add(cmx255_pcmcia_device); |
| 143 | } |
| 144 | |
| 145 | if (ret) |
| 146 | platform_device_put(cmx255_pcmcia_device); |
| 147 | |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | void __exit cmx255_pcmcia_exit(void) |
| 152 | { |
| 153 | platform_device_unregister(cmx255_pcmcia_device); |
| 154 | } |