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drivers/pcmcia/electra_cf.c
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/* * 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> |
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#include <linux/mm.h> |
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#include <linux/vmalloc.h> |
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#include <linux/of_platform.h> |
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#include <pcmcia/ss.h> |
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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 ", 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 "); 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 "); 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 "); goto fail1; } if (!request_region(cf->io_base, cf->io_size, driver_name)) { status = -ENXIO; dev_err(device, "Can't claim I/O region "); 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 "); goto fail3; } dev_info(device, "at mem 0x%lx io 0x%lx irq %d ", 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", }, {}, }; |
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MODULE_DEVICE_TABLE(of, electra_cf_match); |
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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"); |