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118 lines
2.9 KiB
118 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2012 Paul Parsons <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/err.h> |
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#include <linux/gpio.h> |
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#include <linux/irq.h> |
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#include <asm/mach-types.h> |
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#include <mach/hx4700.h> |
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#include "soc_common.h" |
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static struct gpio gpios[] = { |
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{ GPIO114_HX4700_CF_RESET, GPIOF_OUT_INIT_LOW, "CF reset" }, |
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{ EGPIO4_CF_3V3_ON, GPIOF_OUT_INIT_LOW, "CF 3.3V enable" }, |
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}; |
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static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
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{ |
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int ret; |
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ret = gpio_request_array(gpios, ARRAY_SIZE(gpios)); |
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if (ret) |
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goto out; |
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/* |
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* IRQ type must be set before soc_pcmcia_hw_init() calls request_irq(). |
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* The asic3 default IRQ type is level trigger low level detect, exactly |
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* the the signal present on GPIOD4_CF_nCD when a CF card is inserted. |
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* If the IRQ type is not changed, the asic3 interrupt handler will loop |
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* repeatedly because it is unable to clear the level trigger interrupt. |
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*/ |
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irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH); |
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skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD; |
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skt->stat[SOC_STAT_CD].name = "PCMCIA CD"; |
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skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB; |
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skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; |
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out: |
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return ret; |
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} |
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static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
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{ |
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gpio_free_array(gpios, ARRAY_SIZE(gpios)); |
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} |
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static void hx4700_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->vs_3v = 1; |
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state->vs_Xv = 0; |
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} |
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static int hx4700_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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switch (state->Vcc) { |
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case 0: |
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gpio_set_value(EGPIO4_CF_3V3_ON, 0); |
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break; |
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case 33: |
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gpio_set_value(EGPIO4_CF_3V3_ON, 1); |
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break; |
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default: |
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printk(KERN_ERR "pcmcia: Unsupported Vcc: %d\n", state->Vcc); |
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return -EINVAL; |
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} |
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gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0); |
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return 0; |
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} |
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static struct pcmcia_low_level hx4700_pcmcia_ops = { |
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.owner = THIS_MODULE, |
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.nr = 1, |
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.hw_init = hx4700_pcmcia_hw_init, |
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.hw_shutdown = hx4700_pcmcia_hw_shutdown, |
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.socket_state = hx4700_pcmcia_socket_state, |
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.configure_socket = hx4700_pcmcia_configure_socket, |
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}; |
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static struct platform_device *hx4700_pcmcia_device; |
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static int __init hx4700_pcmcia_init(void) |
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{ |
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struct platform_device *pdev; |
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if (!machine_is_h4700()) |
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return -ENODEV; |
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pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1, |
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&hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops)); |
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if (IS_ERR(pdev)) |
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return PTR_ERR(pdev); |
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hx4700_pcmcia_device = pdev; |
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return 0; |
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} |
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static void __exit hx4700_pcmcia_exit(void) |
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{ |
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platform_device_unregister(hx4700_pcmcia_device); |
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} |
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module_init(hx4700_pcmcia_init); |
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module_exit(hx4700_pcmcia_exit); |
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MODULE_AUTHOR("Paul Parsons <[email protected]>"); |
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MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver"); |
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MODULE_LICENSE("GPL");
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