--- /dev/null
+/*
+ * file: drivers/pcmcia/bfin_cf.c
+ *
+ * based on: drivers/pcmcia/omap_cf.c
+ * omap_cf.c -- OMAP 16xx CompactFlash controller driver
+ *
+ * Copyright (c) 2005 David Brownell
+ * Copyright (c) 2006-2008 Michael Hennerich Analog Devices Inc.
+ *
+ * bugs: enter bugs at http://blackfin.uclinux.org/
+ *
+ * this program is free software; you can redistribute it and/or modify
+ * it under the terms of the gnu general public license as published by
+ * the free software foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * this program is distributed in the hope that it will be useful,
+ * but without any warranty; without even the implied warranty of
+ * merchantability or fitness for a particular purpose. see the
+ * gnu general public license for more details.
+ *
+ * you should have received a copy of the gnu general public license
+ * along with this program; see the file copying.
+ * if not, write to the free software foundation,
+ * 59 temple place - suite 330, boston, ma 02111-1307, usa.
+ */
+
+#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/irq.h>
+#include <linux/io.h>
+
+#include <pcmcia/ss.h>
+#include <pcmcia/cisreg.h>
+#include <asm/gpio.h>
+
+#define SZ_1K 0x00000400
+#define SZ_8K 0x00002000
+#define SZ_2K (2 * SZ_1K)
+
+#define POLL_INTERVAL (2 * HZ)
+
+#define CF_ATASEL_ENA 0x20311802 /* Inverts RESET */
+#define CF_ATASEL_DIS 0x20311800
+
+#define bfin_cf_present(pfx) (gpio_get_value(pfx))
+
+/*--------------------------------------------------------------------------*/
+
+static const char driver_name[] = "bfin_cf_pcmcia";
+
+struct bfin_cf_socket {
+ struct pcmcia_socket socket;
+
+ struct timer_list timer;
+ unsigned present:1;
+ unsigned active:1;
+
+ struct platform_device *pdev;
+ unsigned long phys_cf_io;
+ unsigned long phys_cf_attr;
+ u_int irq;
+ u_short cd_pfx;
+};
+
+/*--------------------------------------------------------------------------*/
+static int bfin_cf_reset(void)
+{
+ outw(0, CF_ATASEL_ENA);
+ mdelay(200);
+ outw(0, CF_ATASEL_DIS);
+
+ return 0;
+}
+
+static int bfin_cf_ss_init(struct pcmcia_socket *s)
+{
+ return 0;
+}
+
+/* the timer is primarily to kick this socket's pccardd */
+static void bfin_cf_timer(unsigned long _cf)
+{
+ struct bfin_cf_socket *cf = (void *)_cf;
+ unsigned short present = bfin_cf_present(cf->cd_pfx);
+
+ if (present != cf->present) {
+ cf->present = present;
+ dev_dbg(&cf->pdev->dev, ": card %s\n",
+ present ? "present" : "gone");
+ pcmcia_parse_events(&cf->socket, SS_DETECT);
+ }
+
+ if (cf->active)
+ mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
+}
+
+static int bfin_cf_get_status(struct pcmcia_socket *s, u_int *sp)
+{
+ struct bfin_cf_socket *cf;
+
+ if (!sp)
+ return -EINVAL;
+
+ cf = container_of(s, struct bfin_cf_socket, socket);
+
+ if (bfin_cf_present(cf->cd_pfx)) {
+ *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
+ s->irq.AssignedIRQ = 0;
+ s->pci_irq = cf->irq;
+
+ } else
+ *sp = 0;
+ return 0;
+}
+
+static int
+bfin_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
+{
+
+ struct bfin_cf_socket *cf;
+ cf = container_of(sock, struct bfin_cf_socket, socket);
+
+ switch (s->Vcc) {
+ case 0:
+ case 33:
+ break;
+ case 50:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (s->flags & SS_RESET) {
+ disable_irq(cf->irq);
+ bfin_cf_reset();
+ enable_irq(cf->irq);
+ }
+
+ dev_dbg(&cf->pdev->dev, ": Vcc %d, io_irq %d, flags %04x csc %04x\n",
+ s->Vcc, s->io_irq, s->flags, s->csc_mask);
+
+ return 0;
+}
+
+static int bfin_cf_ss_suspend(struct pcmcia_socket *s)
+{
+ return bfin_cf_set_socket(s, &dead_socket);
+}
+
+/* regions are 2K each: mem, attrib, io (and reserved-for-ide) */
+
+static int bfin_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
+{
+ struct bfin_cf_socket *cf;
+
+ cf = container_of(s, struct bfin_cf_socket, socket);
+ io->flags &= MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT;
+ io->start = cf->phys_cf_io;
+ io->stop = io->start + SZ_2K - 1;
+ return 0;
+}
+
+static int
+bfin_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
+{
+ struct bfin_cf_socket *cf;
+
+ if (map->card_start)
+ return -EINVAL;
+ cf = container_of(s, struct bfin_cf_socket, socket);
+ map->static_start = cf->phys_cf_io;
+ map->flags &= MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT;
+ if (map->flags & MAP_ATTRIB)
+ map->static_start = cf->phys_cf_attr;
+
+ return 0;
+}
+
+static struct pccard_operations bfin_cf_ops = {
+ .init = bfin_cf_ss_init,
+ .suspend = bfin_cf_ss_suspend,
+ .get_status = bfin_cf_get_status,
+ .set_socket = bfin_cf_set_socket,
+ .set_io_map = bfin_cf_set_io_map,
+ .set_mem_map = bfin_cf_set_mem_map,
+};
+
+/*--------------------------------------------------------------------------*/
+
+static int __devinit bfin_cf_probe(struct platform_device *pdev)
+{
+ struct bfin_cf_socket *cf;
+ struct resource *io_mem, *attr_mem;
+ int irq;
+ unsigned short cd_pfx;
+ int status = 0;
+
+ dev_info(&pdev->dev, "Blackfin CompactFlash/PCMCIA Socket Driver\n");
+
+ irq = platform_get_irq(pdev, 0);
+ if (!irq)
+ return -EINVAL;
+
+ cd_pfx = platform_get_irq(pdev, 1); /*Card Detect GPIO PIN */
+
+ if (gpio_request(cd_pfx, "pcmcia: CD")) {
+ dev_err(&pdev->dev,
+ "Failed ro request Card Detect GPIO_%d\n",
+ cd_pfx);
+ return -EBUSY;
+ }
+ gpio_direction_input(cd_pfx);
+
+ cf = kzalloc(sizeof *cf, GFP_KERNEL);
+ if (!cf) {
+ gpio_free(cd_pfx);
+ return -ENOMEM;
+ }
+
+ cf->cd_pfx = cd_pfx;
+
+ setup_timer(&cf->timer, bfin_cf_timer, (unsigned long)cf);
+
+ cf->pdev = pdev;
+ platform_set_drvdata(pdev, cf);
+
+ cf->irq = irq;
+ cf->socket.pci_irq = irq;
+
+ set_irq_type(irq, IRQF_TRIGGER_LOW);
+
+ io_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ attr_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+
+ if (!io_mem || !attr_mem)
+ goto fail0;
+
+ cf->phys_cf_io = io_mem->start;
+ cf->phys_cf_attr = attr_mem->start;
+
+ /* pcmcia layer only remaps "real" memory */
+ cf->socket.io_offset = (unsigned long)
+ ioremap(cf->phys_cf_io, SZ_2K);
+
+ if (!cf->socket.io_offset)
+ goto fail0;
+
+ dev_err(&pdev->dev, ": on irq %d\n", irq);
+
+ dev_dbg(&pdev->dev, ": %s\n",
+ bfin_cf_present(cf->cd_pfx) ? "present" : "(not present)");
+
+ cf->socket.owner = THIS_MODULE;
+ cf->socket.dev.parent = &pdev->dev;
+ cf->socket.ops = &bfin_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 = SZ_2K;
+
+ status = pcmcia_register_socket(&cf->socket);
+ if (status < 0)
+ goto fail2;
+
+ cf->active = 1;
+ mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
+ return 0;
+
+fail2:
+ iounmap((void __iomem *)cf->socket.io_offset);
+ release_mem_region(cf->phys_cf_io, SZ_8K);
+
+fail0:
+ gpio_free(cf->cd_pfx);
+ kfree(cf);
+ platform_set_drvdata(pdev, NULL);
+
+ return status;
+}
+
+static int __devexit bfin_cf_remove(struct platform_device *pdev)
+{
+ struct bfin_cf_socket *cf = platform_get_drvdata(pdev);
+
+ gpio_free(cf->cd_pfx);
+ cf->active = 0;
+ pcmcia_unregister_socket(&cf->socket);
+ del_timer_sync(&cf->timer);
+ iounmap((void __iomem *)cf->socket.io_offset);
+ release_mem_region(cf->phys_cf_io, SZ_8K);
+ platform_set_drvdata(pdev, NULL);
+ kfree(cf);
+ return 0;
+}
+
+static int bfin_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ return pcmcia_socket_dev_suspend(&pdev->dev, mesg);
+}
+
+static int bfin_cf_resume(struct platform_device *pdev)
+{
+ return pcmcia_socket_dev_resume(&pdev->dev);
+}
+
+static struct platform_driver bfin_cf_driver = {
+ .driver = {
+ .name = (char *)driver_name,
+ .owner = THIS_MODULE,
+ },
+ .probe = bfin_cf_probe,
+ .remove = __devexit_p(bfin_cf_remove),
+ .suspend = bfin_cf_suspend,
+ .resume = bfin_cf_resume,
+};
+
+static int __init bfin_cf_init(void)
+{
+ return platform_driver_register(&bfin_cf_driver);
+}
+
+static void __exit bfin_cf_exit(void)
+{
+ platform_driver_unregister(&bfin_cf_driver);
+}
+
+module_init(bfin_cf_init);
+module_exit(bfin_cf_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>")
+MODULE_DESCRIPTION("BFIN CF/PCMCIA Driver");
+MODULE_LICENSE("GPL");
projects / kernel / kernel-generic.git / commitdiff