+++ /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/slab.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/gpio.h>
-
-#include <pcmcia/ss.h>
-#include <pcmcia/cisreg.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(struct timer_list *t)
-{
- struct bfin_cf_socket *cf = from_timer(cf, t, timer);
- 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->pcmcia_irq = 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 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 <= 0)
- 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;
-
- timer_setup(&cf->timer, bfin_cf_timer, 0);
-
- cf->pdev = pdev;
- platform_set_drvdata(pdev, cf);
-
- cf->irq = irq;
- cf->socket.pci_irq = 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 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 struct platform_driver bfin_cf_driver = {
- .driver = {
- .name = driver_name,
- },
- .probe = bfin_cf_probe,
- .remove = bfin_cf_remove,
-};
-
-module_platform_driver(bfin_cf_driver);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("BFIN CF/PCMCIA Driver");
-MODULE_LICENSE("GPL");
projects / linux-block.git / commitdiff