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![Mike Rapoport](/assets/img/avatar_default.png)
This patch provides support for PCMCIA on CM-X270 Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
175 lines
4.4 KiB
C
175 lines
4.4 KiB
C
/*
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* linux/drivers/pcmcia/pxa/pxa_cm_x270.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Compulab Ltd., 2003, 2007
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* Mike Rapoport <mike@compulab.co.il>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/platform_device.h>
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#include <linux/irq.h>
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#include <linux/delay.h>
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#include <pcmcia/ss.h>
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#include <asm/hardware.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/cm-x270.h>
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#include "soc_common.h"
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static struct pcmcia_irqs irqs[] = {
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{ 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
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{ 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" },
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};
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static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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GPSR(GPIO48_nPOE) = GPIO_bit(GPIO48_nPOE) |
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GPIO_bit(GPIO49_nPWE) |
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GPIO_bit(GPIO50_nPIOR) |
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GPIO_bit(GPIO51_nPIOW) |
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GPIO_bit(GPIO85_nPCE_1) |
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GPIO_bit(GPIO54_nPCE_2);
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pxa_gpio_mode(GPIO48_nPOE_MD);
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pxa_gpio_mode(GPIO49_nPWE_MD);
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pxa_gpio_mode(GPIO50_nPIOR_MD);
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pxa_gpio_mode(GPIO51_nPIOW_MD);
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pxa_gpio_mode(GPIO85_nPCE_1_MD);
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pxa_gpio_mode(GPIO54_nPCE_2_MD);
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pxa_gpio_mode(GPIO55_nPREG_MD);
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pxa_gpio_mode(GPIO56_nPWAIT_MD);
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pxa_gpio_mode(GPIO57_nIOIS16_MD);
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/* Reset signal */
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pxa_gpio_mode(GPIO53_nPCE_2 | GPIO_OUT);
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GPCR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
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set_irq_type(PCMCIA_S0_CD_VALID, IRQ_TYPE_EDGE_BOTH);
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set_irq_type(PCMCIA_S1_CD_VALID, IRQ_TYPE_EDGE_BOTH);
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/* irq's for slots: */
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set_irq_type(PCMCIA_S0_RDYINT, IRQ_TYPE_EDGE_FALLING);
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set_irq_type(PCMCIA_S1_RDYINT, IRQ_TYPE_EDGE_FALLING);
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skt->irq = (skt->nr == 0) ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT;
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
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set_irq_type(IRQ_TO_GPIO(PCMCIA_S0_CD_VALID), IRQ_TYPE_NONE);
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set_irq_type(IRQ_TO_GPIO(PCMCIA_S1_CD_VALID), IRQ_TYPE_NONE);
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set_irq_type(IRQ_TO_GPIO(PCMCIA_S0_RDYINT), IRQ_TYPE_NONE);
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set_irq_type(IRQ_TO_GPIO(PCMCIA_S1_RDYINT), IRQ_TYPE_NONE);
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}
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static void cmx270_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->detect = (PCC_DETECT(skt->nr) == 0) ? 1 : 0;
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state->ready = (PCC_READY(skt->nr) == 0) ? 0 : 1;
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state->bvd1 = 1;
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state->bvd2 = 1;
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state->vs_3v = 0;
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state->vs_Xv = 0;
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state->wrprot = 0; /* not available */
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}
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static int cmx270_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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GPSR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
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pxa_gpio_mode(GPIO49_nPWE | GPIO_OUT);
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switch (skt->nr) {
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case 0:
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if (state->flags & SS_RESET) {
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GPCR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
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GPSR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
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udelay(10);
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GPCR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
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GPSR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
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}
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break;
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case 1:
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if (state->flags & SS_RESET) {
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GPCR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
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GPSR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
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udelay(10);
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GPCR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
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GPSR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
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}
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break;
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}
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pxa_gpio_mode(GPIO49_nPWE_MD);
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return 0;
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}
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static void cmx270_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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}
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static void cmx270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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}
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static struct pcmcia_low_level cmx270_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = cmx270_pcmcia_hw_init,
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.hw_shutdown = cmx270_pcmcia_shutdown,
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.socket_state = cmx270_pcmcia_socket_state,
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.configure_socket = cmx270_pcmcia_configure_socket,
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.socket_init = cmx270_pcmcia_socket_init,
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.socket_suspend = cmx270_pcmcia_socket_suspend,
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.nr = 2,
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};
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static struct platform_device *cmx270_pcmcia_device;
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static int __init cmx270_pcmcia_init(void)
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{
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int ret;
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cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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if (!cmx270_pcmcia_device)
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return -ENOMEM;
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cmx270_pcmcia_device->dev.platform_data = &cmx270_pcmcia_ops;
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printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
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ret = platform_device_add(cmx270_pcmcia_device);
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if (ret)
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platform_device_put(cmx270_pcmcia_device);
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return ret;
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}
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static void __exit cmx270_pcmcia_exit(void)
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{
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platform_device_unregister(cmx270_pcmcia_device);
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}
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module_init(cmx270_pcmcia_init);
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module_exit(cmx270_pcmcia_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
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MODULE_DESCRIPTION("CM-x270 PCMCIA driver");
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