Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 2 | /* |
| 3 | * linux/drivers/pcmcia/pxa/pxa_cm_x255.c |
| 4 | * |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 5 | * Compulab Ltd., 2003, 2007, 2008 |
| 6 | * Mike Rapoport <mike@compulab.co.il> |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/platform_device.h> |
| 10 | #include <linux/irq.h> |
| 11 | #include <linux/delay.h> |
| 12 | #include <linux/gpio.h> |
Paul Gortmaker | 402b20d | 2011-07-31 16:21:42 -0400 | [diff] [blame] | 13 | #include <linux/export.h> |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 14 | |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 15 | #include "soc_common.h" |
| 16 | |
| 17 | #define GPIO_PCMCIA_SKTSEL (54) |
| 18 | #define GPIO_PCMCIA_S0_CD_VALID (16) |
| 19 | #define GPIO_PCMCIA_S1_CD_VALID (17) |
| 20 | #define GPIO_PCMCIA_S0_RDYINT (6) |
| 21 | #define GPIO_PCMCIA_S1_RDYINT (8) |
| 22 | #define GPIO_PCMCIA_RESET (9) |
| 23 | |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 24 | static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 25 | { |
| 26 | int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset"); |
| 27 | if (ret) |
| 28 | return ret; |
| 29 | gpio_direction_output(GPIO_PCMCIA_RESET, 0); |
| 30 | |
Russell King | a9bb5a4 | 2012-01-13 22:56:32 +0000 | [diff] [blame] | 31 | if (skt->nr == 0) { |
| 32 | skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID; |
| 33 | skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD"; |
| 34 | skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT; |
| 35 | skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY"; |
| 36 | } else { |
| 37 | skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S1_CD_VALID; |
| 38 | skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD"; |
| 39 | skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S1_RDYINT; |
| 40 | skt->stat[SOC_STAT_RDY].name = "PCMCIA1 RDY"; |
| 41 | } |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 42 | |
Russell King | a9bb5a4 | 2012-01-13 22:56:32 +0000 | [diff] [blame] | 43 | return 0; |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt) |
| 47 | { |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 48 | gpio_free(GPIO_PCMCIA_RESET); |
| 49 | } |
| 50 | |
| 51 | |
| 52 | static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
| 53 | struct pcmcia_state *state) |
| 54 | { |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 55 | state->vs_3v = 0; |
| 56 | state->vs_Xv = 0; |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | |
| 60 | static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 61 | const socket_state_t *state) |
| 62 | { |
| 63 | switch (skt->nr) { |
| 64 | case 0: |
| 65 | if (state->flags & SS_RESET) { |
| 66 | gpio_set_value(GPIO_PCMCIA_SKTSEL, 0); |
| 67 | udelay(1); |
| 68 | gpio_set_value(GPIO_PCMCIA_RESET, 1); |
| 69 | udelay(10); |
| 70 | gpio_set_value(GPIO_PCMCIA_RESET, 0); |
| 71 | } |
| 72 | break; |
| 73 | case 1: |
| 74 | if (state->flags & SS_RESET) { |
| 75 | gpio_set_value(GPIO_PCMCIA_SKTSEL, 1); |
| 76 | udelay(1); |
| 77 | gpio_set_value(GPIO_PCMCIA_RESET, 1); |
| 78 | udelay(10); |
| 79 | gpio_set_value(GPIO_PCMCIA_RESET, 0); |
| 80 | } |
| 81 | break; |
| 82 | } |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 87 | static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = { |
| 88 | .owner = THIS_MODULE, |
| 89 | .hw_init = cmx255_pcmcia_hw_init, |
| 90 | .hw_shutdown = cmx255_pcmcia_shutdown, |
| 91 | .socket_state = cmx255_pcmcia_socket_state, |
| 92 | .configure_socket = cmx255_pcmcia_configure_socket, |
Mike Rapoport | 8616e2f | 2008-10-05 10:27:22 +0100 | [diff] [blame] | 93 | .nr = 1, |
| 94 | }; |
| 95 | |
| 96 | static struct platform_device *cmx255_pcmcia_device; |
| 97 | |
| 98 | int __init cmx255_pcmcia_init(void) |
| 99 | { |
| 100 | int ret; |
| 101 | |
| 102 | cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
| 103 | |
| 104 | if (!cmx255_pcmcia_device) |
| 105 | return -ENOMEM; |
| 106 | |
| 107 | ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops, |
| 108 | sizeof(cmx255_pcmcia_ops)); |
| 109 | |
| 110 | if (ret == 0) { |
| 111 | printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n"); |
| 112 | ret = platform_device_add(cmx255_pcmcia_device); |
| 113 | } |
| 114 | |
| 115 | if (ret) |
| 116 | platform_device_put(cmx255_pcmcia_device); |
| 117 | |
| 118 | return ret; |
| 119 | } |
| 120 | |
| 121 | void __exit cmx255_pcmcia_exit(void) |
| 122 | { |
| 123 | platform_device_unregister(cmx255_pcmcia_device); |
| 124 | } |