diff options
Diffstat (limited to 'drivers/pcmcia')
| -rw-r--r-- | drivers/pcmcia/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/pcmcia/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pcmcia/electra_cf.c | 377 |
3 files changed, 385 insertions, 0 deletions
diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig index f201bd673137..519b4ff79f7f 100644 --- a/drivers/pcmcia/Kconfig +++ b/drivers/pcmcia/Kconfig @@ -269,6 +269,13 @@ config AT91_CF Say Y here to support the CompactFlash controller on AT91 chips. Or choose M to compile the driver as a module named "at91_cf". +config ELECTRA_CF + tristate "Electra CompactFlash Controller" + depends on PCMCIA && PPC_PASEMI + help + Say Y here to support the CompactFlash controller on the + PA Semi Electra eval board. + config PCCARD_NONSTATIC tristate diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile index dc7a4cb5d270..6f6478ba7174 100644 --- a/drivers/pcmcia/Makefile +++ b/drivers/pcmcia/Makefile @@ -37,6 +37,7 @@ obj-$(CONFIG_PCMCIA_VRC4171) += vrc4171_card.o obj-$(CONFIG_PCMCIA_VRC4173) += vrc4173_cardu.o obj-$(CONFIG_OMAP_CF) += omap_cf.o obj-$(CONFIG_AT91_CF) += at91_cf.o +obj-$(CONFIG_ELECTRA_CF) += electra_cf.o sa11xx_core-y += soc_common.o sa11xx_base.o pxa2xx_core-y += soc_common.o pxa2xx_base.o diff --git a/drivers/pcmcia/electra_cf.c b/drivers/pcmcia/electra_cf.c new file mode 100644 index 000000000000..0a6cea1316b4 --- /dev/null +++ b/drivers/pcmcia/electra_cf.c @@ -0,0 +1,377 @@ +/* + * Copyright (C) 2007 PA Semi, Inc + * + * Maintained by: Olof Johansson <olof@lixom.net> + * + * Based on drivers/pcmcia/omap_cf.c + * + * 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 of the License, 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; if not, write to the Free Software + * Foundation, Inc., 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/vmalloc.h> + +#include <pcmcia/ss.h> +#include <asm/of_platform.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 of_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(unsigned long _cf) +{ + struct electra_cf_socket *cf = (void *) _cf; + 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) +{ + electra_cf_timer((unsigned long)_cf); + 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 __devinit electra_cf_probe(struct of_device *ofdev, + const struct of_device_id *match) +{ + struct device *device = &ofdev->dev; + struct device_node *np = ofdev->node; + struct electra_cf_socket *cf; + struct resource mem, io; + int status; + const unsigned int *prop; + int err; + struct vm_struct *area; + + 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; + + setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf); + cf->irq = NO_IRQ; + + cf->ofdev = ofdev; + cf->mem_phys = mem.start; + cf->mem_size = PAGE_ALIGN(mem.end - mem.start); + cf->mem_base = ioremap(cf->mem_phys, cf->mem_size); + cf->io_size = PAGE_ALIGN(io.end - io.start); + + area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END); + if (area == NULL) + return -ENOMEM; + + cf->io_virt = (void __iomem *)(area->addr); + + cf->gpio_base = ioremap(0xfc103000, 0x1000); + dev_set_drvdata(device, cf); + + if (!cf->mem_base || !cf->io_virt || !cf->gpio_base || + (__ioremap_at(io.start, cf->io_virt, cf->io_size, + _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) { + dev_err(device, "can't ioremap ranges\n"); + status = -ENOMEM; + goto fail1; + } + + + 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; + + 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%lx irq %d\n", + cf->mem_phys, io.start, cf->irq); + + cf->active = 1; + electra_cf_timer((unsigned long)cf); + 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 != NO_IRQ) + free_irq(cf->irq, cf); + + if (cf->io_virt) + __iounmap_at(cf->io_virt, cf->io_size); + if (cf->mem_base) + iounmap(cf->mem_base); + if (cf->gpio_base) + iounmap(cf->gpio_base); + device_init_wakeup(&ofdev->dev, 0); + kfree(cf); + return status; + +} + +static int __devexit electra_cf_remove(struct of_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_at(cf->io_virt, cf->io_size); + 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 struct of_device_id electra_cf_match[] = { + { + .compatible = "electra-cf", + }, + {}, +}; + +static struct of_platform_driver electra_cf_driver = { + .name = (char *)driver_name, + .match_table = electra_cf_match, + .probe = electra_cf_probe, + .remove = electra_cf_remove, +}; + +static int __init electra_cf_init(void) +{ + return of_register_platform_driver(&electra_cf_driver); +} +module_init(electra_cf_init); + +static void __exit electra_cf_exit(void) +{ + of_unregister_platform_driver(&electra_cf_driver); +} +module_exit(electra_cf_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>"); +MODULE_DESCRIPTION("PA Semi Electra CF driver"); |