1 files changed, 354 insertions, 0 deletions

diff --git a/drivers/pcmcia/electra_cf.c b/drivers/pcmcia/electra_cf.c
new file mode 100644
index 000000000..40a5cffe2
--- /dev/null
+++ b/drivers/pcmcia/electra_cf.c
@@ -0,0 +1,354 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2007 PA Semi, Inc
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * Based on drivers/pcmcia/omap_cf.c
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/platform_device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+
+#include <pcmcia/ss.h>
+
+static const char driver_name[] = "electra-cf";
+
+struct electra_cf_socket {
+	struct pcmcia_socket	socket;
+
+	struct timer_list	timer;
+	unsigned		present:1;
+	unsigned		active:1;
+
+	struct platform_device	*ofdev;
+	unsigned long		mem_phys;
+	void __iomem		*mem_base;
+	unsigned long		mem_size;
+	void __iomem		*io_virt;
+	unsigned int		io_base;
+	unsigned int		io_size;
+	u_int			irq;
+	struct resource		iomem;
+	void __iomem		*gpio_base;
+	int			gpio_detect;
+	int			gpio_vsense;
+	int			gpio_3v;
+	int			gpio_5v;
+};
+
+#define	POLL_INTERVAL		(2 * HZ)
+
+
+static int electra_cf_present(struct electra_cf_socket *cf)
+{
+	unsigned int gpio;
+
+	gpio = in_le32(cf->gpio_base+0x40);
+	return !(gpio & (1 << cf->gpio_detect));
+}
+
+static int electra_cf_ss_init(struct pcmcia_socket *s)
+{
+	return 0;
+}
+
+/* the timer is primarily to kick this socket's pccardd */
+static void electra_cf_timer(struct timer_list *t)
+{
+	struct electra_cf_socket *cf = from_timer(cf, t, timer);
+	int present = electra_cf_present(cf);
+
+	if (present != cf->present) {
+		cf->present = present;
+		pcmcia_parse_events(&cf->socket, SS_DETECT);
+	}
+
+	if (cf->active)
+		mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
+}
+
+static irqreturn_t electra_cf_irq(int irq, void *_cf)
+{
+	struct electra_cf_socket *cf = _cf;
+
+	electra_cf_timer(&cf->timer);
+	return IRQ_HANDLED;
+}
+
+static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
+{
+	struct electra_cf_socket *cf;
+
+	if (!sp)
+		return -EINVAL;
+
+	cf = container_of(s, struct electra_cf_socket, socket);
+
+	/* NOTE CF is always 3VCARD */
+	if (electra_cf_present(cf)) {
+		*sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
+
+		s->pci_irq = cf->irq;
+	} else
+		*sp = 0;
+	return 0;
+}
+
+static int electra_cf_set_socket(struct pcmcia_socket *sock,
+				 struct socket_state_t *s)
+{
+	unsigned int gpio;
+	unsigned int vcc;
+	struct electra_cf_socket *cf;
+
+	cf = container_of(sock, struct electra_cf_socket, socket);
+
+	/* "reset" means no power in our case */
+	vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
+
+	switch (vcc) {
+	case 0:
+		gpio = 0;
+		break;
+	case 33:
+		gpio = (1 << cf->gpio_3v);
+		break;
+	case 5:
+		gpio = (1 << cf->gpio_5v);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	gpio |= 1 << (cf->gpio_3v + 16); /* enwr */
+	gpio |= 1 << (cf->gpio_5v + 16); /* enwr */
+	out_le32(cf->gpio_base+0x90, gpio);
+
+	pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
+		driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
+
+	return 0;
+}
+
+static int electra_cf_set_io_map(struct pcmcia_socket *s,
+				 struct pccard_io_map *io)
+{
+	return 0;
+}
+
+static int electra_cf_set_mem_map(struct pcmcia_socket *s,
+				  struct pccard_mem_map *map)
+{
+	struct electra_cf_socket *cf;
+
+	if (map->card_start)
+		return -EINVAL;
+	cf = container_of(s, struct electra_cf_socket, socket);
+	map->static_start = cf->mem_phys;
+	map->flags &= MAP_ACTIVE|MAP_ATTRIB;
+	if (!(map->flags & MAP_ATTRIB))
+		map->static_start += 0x800;
+	return 0;
+}
+
+static struct pccard_operations electra_cf_ops = {
+	.init			= electra_cf_ss_init,
+	.get_status		= electra_cf_get_status,
+	.set_socket		= electra_cf_set_socket,
+	.set_io_map		= electra_cf_set_io_map,
+	.set_mem_map		= electra_cf_set_mem_map,
+};
+
+static int electra_cf_probe(struct platform_device *ofdev)
+{
+	struct device *device = &ofdev->dev;
+	struct device_node *np = ofdev->dev.of_node;
+	struct electra_cf_socket   *cf;
+	struct resource mem, io;
+	int status = -ENOMEM;
+	const unsigned int *prop;
+	int err;
+
+	err = of_address_to_resource(np, 0, &mem);
+	if (err)
+		return -EINVAL;
+
+	err = of_address_to_resource(np, 1, &io);
+	if (err)
+		return -EINVAL;
+
+	cf = kzalloc(sizeof(*cf), GFP_KERNEL);
+	if (!cf)
+		return -ENOMEM;
+
+	timer_setup(&cf->timer, electra_cf_timer, 0);
+	cf->irq = 0;
+
+	cf->ofdev = ofdev;
+	cf->mem_phys = mem.start;
+	cf->mem_size = PAGE_ALIGN(resource_size(&mem));
+	cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
+	if (!cf->mem_base)
+		goto out_free_cf;
+	cf->io_size = PAGE_ALIGN(resource_size(&io));
+	cf->io_virt = ioremap_phb(io.start, cf->io_size);
+	if (!cf->io_virt)
+		goto out_unmap_mem;
+
+	cf->gpio_base = ioremap(0xfc103000, 0x1000);
+	if (!cf->gpio_base)
+		goto out_unmap_virt;
+	dev_set_drvdata(device, cf);
+
+	cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
+	cf->iomem.start = (unsigned long)cf->mem_base;
+	cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
+	cf->iomem.flags = IORESOURCE_MEM;
+
+	cf->irq = irq_of_parse_and_map(np, 0);
+
+	status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
+			     driver_name, cf);
+	if (status < 0) {
+		dev_err(device, "request_irq failed\n");
+		goto fail1;
+	}
+
+	cf->socket.pci_irq = cf->irq;
+
+	status = -EINVAL;
+
+	prop = of_get_property(np, "card-detect-gpio", NULL);
+	if (!prop)
+		goto fail1;
+	cf->gpio_detect = *prop;
+
+	prop = of_get_property(np, "card-vsense-gpio", NULL);
+	if (!prop)
+		goto fail1;
+	cf->gpio_vsense = *prop;
+
+	prop = of_get_property(np, "card-3v-gpio", NULL);
+	if (!prop)
+		goto fail1;
+	cf->gpio_3v = *prop;
+
+	prop = of_get_property(np, "card-5v-gpio", NULL);
+	if (!prop)
+		goto fail1;
+	cf->gpio_5v = *prop;
+
+	cf->socket.io_offset = cf->io_base;
+
+	/* reserve chip-select regions */
+	if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
+		status = -ENXIO;
+		dev_err(device, "Can't claim memory region\n");
+		goto fail1;
+	}
+
+	if (!request_region(cf->io_base, cf->io_size, driver_name)) {
+		status = -ENXIO;
+		dev_err(device, "Can't claim I/O region\n");
+		goto fail2;
+	}
+
+	cf->socket.owner = THIS_MODULE;
+	cf->socket.dev.parent = &ofdev->dev;
+	cf->socket.ops = &electra_cf_ops;
+	cf->socket.resource_ops = &pccard_static_ops;
+	cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
+				SS_CAP_MEM_ALIGN;
+	cf->socket.map_size = 0x800;
+
+	status = pcmcia_register_socket(&cf->socket);
+	if (status < 0) {
+		dev_err(device, "pcmcia_register_socket failed\n");
+		goto fail3;
+	}
+
+	dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
+		 cf->mem_phys, io.start, cf->irq);
+
+	cf->active = 1;
+	electra_cf_timer(&cf->timer);
+	return 0;
+
+fail3:
+	release_region(cf->io_base, cf->io_size);
+fail2:
+	release_mem_region(cf->mem_phys, cf->mem_size);
+fail1:
+	if (cf->irq)
+		free_irq(cf->irq, cf);
+
+	iounmap(cf->gpio_base);
+out_unmap_virt:
+	device_init_wakeup(&ofdev->dev, 0);
+	iounmap(cf->io_virt);
+out_unmap_mem:
+	iounmap(cf->mem_base);
+out_free_cf:
+	kfree(cf);
+	return status;
+
+}
+
+static int electra_cf_remove(struct platform_device *ofdev)
+{
+	struct device *device = &ofdev->dev;
+	struct electra_cf_socket *cf;
+
+	cf = dev_get_drvdata(device);
+
+	cf->active = 0;
+	pcmcia_unregister_socket(&cf->socket);
+	free_irq(cf->irq, cf);
+	del_timer_sync(&cf->timer);
+
+	iounmap(cf->io_virt);
+	iounmap(cf->mem_base);
+	iounmap(cf->gpio_base);
+	release_mem_region(cf->mem_phys, cf->mem_size);
+	release_region(cf->io_base, cf->io_size);
+
+	kfree(cf);
+
+	return 0;
+}
+
+static const struct of_device_id electra_cf_match[] = {
+	{
+		.compatible   = "electra-cf",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, electra_cf_match);
+
+static struct platform_driver electra_cf_driver = {
+	.driver = {
+		.name = driver_name,
+		.of_match_table = electra_cf_match,
+	},
+	.probe	  = electra_cf_probe,
+	.remove   = electra_cf_remove,
+};
+
+module_platform_driver(electra_cf_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
+MODULE_DESCRIPTION("PA Semi Electra CF driver");