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34fdbe6456
Convert mainstone to use the MAX1600 library and gpiod APIs for socket status and control signals. Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/*
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* linux/drivers/pcmcia/pxa2xx_mainstone.c
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*
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* Mainstone PCMCIA specific routines.
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*
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* Created: May 12, 2004
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* Author: Nicolas Pitre
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* Copyright: MontaVista Software Inc.
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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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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/platform_device.h>
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#include <pcmcia/ss.h>
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#include <asm/mach-types.h>
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#include "soc_common.h"
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#include "max1600.h"
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static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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struct device *dev = skt->socket.dev.parent;
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struct max1600 *m;
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int ret;
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skt->stat[SOC_STAT_CD].name = skt->nr ? "bdetect" : "adetect";
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skt->stat[SOC_STAT_BVD1].name = skt->nr ? "bbvd1" : "abvd1";
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skt->stat[SOC_STAT_BVD2].name = skt->nr ? "bbvd2" : "abvd2";
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skt->stat[SOC_STAT_RDY].name = skt->nr ? "bready" : "aready";
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skt->stat[SOC_STAT_VS1].name = skt->nr ? "bvs1" : "avs1";
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skt->stat[SOC_STAT_VS2].name = skt->nr ? "bvs2" : "avs2";
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skt->gpio_reset = devm_gpiod_get(dev, skt->nr ? "breset" : "areset",
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GPIOD_OUT_HIGH);
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if (IS_ERR(skt->gpio_reset))
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return PTR_ERR(skt->gpio_reset);
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ret = max1600_init(dev, &m, skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
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MAX1600_CODE_HIGH);
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if (ret)
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return ret;
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skt->driver_data = m;
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return soc_pcmcia_request_gpiods(skt);
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}
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static unsigned int mst_pcmcia_bvd1_status[2];
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static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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struct pcmcia_state *state)
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{
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unsigned int flip = mst_pcmcia_bvd1_status[skt->nr] ^ state->bvd1;
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/*
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* Workaround for STSCHG which can't be deasserted:
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* We therefore disable/enable corresponding IRQs
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* as needed to avoid IRQ locks.
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*/
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if (flip) {
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mst_pcmcia_bvd1_status[skt->nr] = state->bvd1;
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if (state->bvd1)
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enable_irq(skt->stat[SOC_STAT_BVD1].irq);
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else
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disable_irq(skt->stat[SOC_STAT_BVD2].irq);
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}
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}
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static int mst_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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return max1600_configure(skt->driver_data, state->Vcc, state->Vpp);
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}
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static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
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.owner = THIS_MODULE,
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.hw_init = mst_pcmcia_hw_init,
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.socket_state = mst_pcmcia_socket_state,
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.configure_socket = mst_pcmcia_configure_socket,
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.nr = 2,
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};
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static struct platform_device *mst_pcmcia_device;
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static int __init mst_pcmcia_init(void)
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{
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int ret;
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if (!machine_is_mainstone())
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return -ENODEV;
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mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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if (!mst_pcmcia_device)
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return -ENOMEM;
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ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
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sizeof(mst_pcmcia_ops));
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if (ret == 0)
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ret = platform_device_add(mst_pcmcia_device);
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if (ret)
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platform_device_put(mst_pcmcia_device);
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return ret;
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}
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static void __exit mst_pcmcia_exit(void)
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{
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platform_device_unregister(mst_pcmcia_device);
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}
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fs_initcall(mst_pcmcia_init);
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module_exit(mst_pcmcia_exit);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pxa2xx-pcmcia");
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