// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/pcmcia/pxa2xx_mainstone.c * * Mainstone PCMCIA specific routines. * * Created: May 12, 2004 * Author: Nicolas Pitre * Copyright: MontaVista Software Inc. */ #include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/platform_device.h> #include <pcmcia/ss.h> #include <asm/mach-types.h> #include "soc_common.h" #include "max1600.h" static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt) { struct device *dev = skt->socket.dev.parent; struct max1600 *m; int ret; skt->stat[SOC_STAT_CD].name = skt->nr ? "bdetect" : "adetect"; skt->stat[SOC_STAT_BVD1].name = skt->nr ? "bbvd1" : "abvd1"; skt->stat[SOC_STAT_BVD2].name = skt->nr ? "bbvd2" : "abvd2"; skt->stat[SOC_STAT_RDY].name = skt->nr ? "bready" : "aready"; skt->stat[SOC_STAT_VS1].name = skt->nr ? "bvs1" : "avs1"; skt->stat[SOC_STAT_VS2].name = skt->nr ? "bvs2" : "avs2"; skt->gpio_reset = devm_gpiod_get(dev, skt->nr ? "breset" : "areset", GPIOD_OUT_HIGH); if (IS_ERR(skt->gpio_reset)) return PTR_ERR(skt->gpio_reset); ret = max1600_init(dev, &m, skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A, MAX1600_CODE_HIGH); if (ret) return ret; skt->driver_data = m; return soc_pcmcia_request_gpiods(skt); } static unsigned int mst_pcmcia_bvd1_status[2]; static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state) { unsigned int flip = mst_pcmcia_bvd1_status[skt->nr] ^ state->bvd1; /* * Workaround for STSCHG which can't be deasserted: * We therefore disable/enable corresponding IRQs * as needed to avoid IRQ locks. */ if (flip) { mst_pcmcia_bvd1_status[skt->nr] = state->bvd1; if (state->bvd1) enable_irq(skt->stat[SOC_STAT_BVD1].irq); else disable_irq(skt->stat[SOC_STAT_BVD2].irq); } } static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) { return max1600_configure(skt->driver_data, state->Vcc, state->Vpp); } static struct pcmcia_low_level mst_pcmcia_ops __initdata = { .owner = THIS_MODULE, .hw_init = mst_pcmcia_hw_init, .socket_state = mst_pcmcia_socket_state, .configure_socket = mst_pcmcia_configure_socket, .nr = 2, }; static struct platform_device *mst_pcmcia_device; static int __init mst_pcmcia_init(void) { int ret; if (!machine_is_mainstone()) return -ENODEV; mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); if (!mst_pcmcia_device) return -ENOMEM; ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops, sizeof(mst_pcmcia_ops)); if (ret == 0) ret = platform_device_add(mst_pcmcia_device); if (ret) platform_device_put(mst_pcmcia_device); return ret; } static void __exit mst_pcmcia_exit(void) { platform_device_unregister(mst_pcmcia_device); } fs_initcall(mst_pcmcia_init); module_exit(mst_pcmcia_exit); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:pxa2xx-pcmcia");