| /* |
| * 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/mm.h> |
| #include <linux/vmalloc.h> |
| #include <linux/of_platform.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 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%llx 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", |
| }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, electra_cf_match); |
| |
| 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"); |