summaryrefslogtreecommitdiffstats
path: root/drivers/pcmcia/pxa2xx_mainstone.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pcmcia/pxa2xx_mainstone.c')
-rw-r--r--drivers/pcmcia/pxa2xx_mainstone.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_mainstone.c b/drivers/pcmcia/pxa2xx_mainstone.c
new file mode 100644
index 000000000..a076e4108
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_mainstone.c
@@ -0,0 +1,122 @@
+// 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");