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137 lines
3.2 KiB
137 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/drivers/pcmcia/pxa2xx_stargate2.c |
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* |
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* Stargate 2 PCMCIA specific routines. |
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* |
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* Created: December 6, 2005 |
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* Author: Ed C. Epp |
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* Copyright: Intel Corp 2005 |
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* Jonathan Cameron <[email protected]> 2009 |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/platform_device.h> |
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#include <linux/gpio.h> |
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#include <pcmcia/ss.h> |
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#include <asm/irq.h> |
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#include <asm/mach-types.h> |
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#include "soc_common.h" |
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#define SG2_S0_POWER_CTL 108 |
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#define SG2_S0_GPIO_RESET 82 |
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#define SG2_S0_GPIO_DETECT 53 |
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#define SG2_S0_GPIO_READY 81 |
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static struct gpio sg2_pcmcia_gpios[] = { |
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{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" }, |
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{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" }, |
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}; |
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static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
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{ |
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skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT; |
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skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD"; |
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skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY; |
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skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY"; |
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return 0; |
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} |
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static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
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struct pcmcia_state *state) |
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{ |
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state->bvd1 = 0; /* not available - battery detect on card */ |
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state->bvd2 = 0; /* not available */ |
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state->vs_3v = 1; /* not available - voltage detect for card */ |
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state->vs_Xv = 0; /* not available */ |
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} |
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static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
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const socket_state_t *state) |
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{ |
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/* Enable card power */ |
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switch (state->Vcc) { |
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case 0: |
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/* sets power ctl register high */ |
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gpio_set_value(SG2_S0_POWER_CTL, 1); |
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break; |
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case 33: |
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case 50: |
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/* sets power control register low (clear) */ |
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gpio_set_value(SG2_S0_POWER_CTL, 0); |
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msleep(100); |
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break; |
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default: |
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pr_err("%s(): bad Vcc %u\n", |
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__func__, state->Vcc); |
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return -1; |
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} |
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/* reset */ |
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gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET)); |
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return 0; |
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} |
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static struct pcmcia_low_level sg2_pcmcia_ops __initdata = { |
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.owner = THIS_MODULE, |
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.hw_init = sg2_pcmcia_hw_init, |
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.socket_state = sg2_pcmcia_socket_state, |
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.configure_socket = sg2_pcmcia_configure_socket, |
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.nr = 1, |
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}; |
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static struct platform_device *sg2_pcmcia_device; |
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static int __init sg2_pcmcia_init(void) |
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{ |
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int ret; |
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if (!machine_is_stargate2()) |
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return -ENODEV; |
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sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
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if (!sg2_pcmcia_device) |
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return -ENOMEM; |
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ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); |
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if (ret) |
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goto error_put_platform_device; |
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ret = platform_device_add_data(sg2_pcmcia_device, |
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&sg2_pcmcia_ops, |
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sizeof(sg2_pcmcia_ops)); |
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if (ret) |
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goto error_free_gpios; |
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ret = platform_device_add(sg2_pcmcia_device); |
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if (ret) |
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goto error_free_gpios; |
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return 0; |
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error_free_gpios: |
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gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); |
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error_put_platform_device: |
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platform_device_put(sg2_pcmcia_device); |
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return ret; |
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} |
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static void __exit sg2_pcmcia_exit(void) |
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{ |
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platform_device_unregister(sg2_pcmcia_device); |
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gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); |
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} |
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fs_initcall(sg2_pcmcia_init); |
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module_exit(sg2_pcmcia_exit); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:pxa2xx-pcmcia");
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