diff options
Diffstat (limited to 'drivers/pcmcia/at91_cf.c')
| -rw-r--r-- | drivers/pcmcia/at91_cf.c | 415 |
1 files changed, 0 insertions, 415 deletions
diff --git a/drivers/pcmcia/at91_cf.c b/drivers/pcmcia/at91_cf.c deleted file mode 100644 index 7db0e9c74dfc..000000000000 --- a/drivers/pcmcia/at91_cf.c +++ /dev/null @@ -1,415 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * at91_cf.c -- AT91 CompactFlash controller driver - * - * Copyright (C) 2005 David Brownell - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/slab.h> -#include <linux/gpio.h> -#include <linux/platform_data/atmel.h> -#include <linux/io.h> -#include <linux/sizes.h> -#include <linux/mfd/syscon.h> -#include <linux/mfd/syscon/atmel-mc.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/of_gpio.h> -#include <linux/regmap.h> - -#include <pcmcia/ss.h> - -/* - * A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW; - * some other bit in {A24,A22..A11} is nREG to flag memory access - * (vs attributes). So more than 2KB/region would just be waste. - * Note: These are offsets from the physical base address. - */ -#define CF_ATTR_PHYS (0) -#define CF_IO_PHYS (1 << 23) -#define CF_MEM_PHYS (0x017ff800) - -struct regmap *mc; - -/*--------------------------------------------------------------------------*/ - -struct at91_cf_socket { - struct pcmcia_socket socket; - - unsigned present:1; - - struct platform_device *pdev; - struct at91_cf_data *board; - - unsigned long phys_baseaddr; -}; - -static inline int at91_cf_present(struct at91_cf_socket *cf) -{ - return !gpio_get_value(cf->board->det_pin); -} - -/*--------------------------------------------------------------------------*/ - -static int at91_cf_ss_init(struct pcmcia_socket *s) -{ - return 0; -} - -static irqreturn_t at91_cf_irq(int irq, void *_cf) -{ - struct at91_cf_socket *cf = _cf; - - if (irq == gpio_to_irq(cf->board->det_pin)) { - unsigned present = at91_cf_present(cf); - - /* kick pccard as needed */ - 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); - } - } - - return IRQ_HANDLED; -} - -static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp) -{ - struct at91_cf_socket *cf; - - if (!sp) - return -EINVAL; - - cf = container_of(s, struct at91_cf_socket, socket); - - /* NOTE: CF is always 3VCARD */ - if (at91_cf_present(cf)) { - int rdy = gpio_is_valid(cf->board->irq_pin); /* RDY/nIRQ */ - int vcc = gpio_is_valid(cf->board->vcc_pin); - - *sp = SS_DETECT | SS_3VCARD; - if (!rdy || gpio_get_value(cf->board->irq_pin)) - *sp |= SS_READY; - if (!vcc || gpio_get_value(cf->board->vcc_pin)) - *sp |= SS_POWERON; - } else - *sp = 0; - - return 0; -} - -static int -at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s) -{ - struct at91_cf_socket *cf; - - cf = container_of(sock, struct at91_cf_socket, socket); - - /* switch Vcc if needed and possible */ - if (gpio_is_valid(cf->board->vcc_pin)) { - switch (s->Vcc) { - case 0: - gpio_set_value(cf->board->vcc_pin, 0); - break; - case 33: - gpio_set_value(cf->board->vcc_pin, 1); - break; - default: - return -EINVAL; - } - } - - /* toggle reset if needed */ - gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET); - - 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 at91_cf_ss_suspend(struct pcmcia_socket *s) -{ - return at91_cf_set_socket(s, &dead_socket); -} - -/* we already mapped the I/O region */ -static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io) -{ - struct at91_cf_socket *cf; - u32 csr; - - cf = container_of(s, struct at91_cf_socket, socket); - io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ); - - /* - * Use 16 bit accesses unless/until we need 8-bit i/o space. - * - * NOTE: this CF controller ignores IOIS16, so we can't really do - * MAP_AUTOSZ. The 16bit mode allows single byte access on either - * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many - * purposes (and handles ide-cs). - * - * The 8bit mode is needed for odd byte access on D0-D7. It seems - * some cards only like that way to get at the odd byte, despite - * CF 3.0 spec table 35 also giving the D8-D15 option. - */ - if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) { - csr = AT91_MC_SMC_DBW_8; - dev_dbg(&cf->pdev->dev, "8bit i/o bus\n"); - } else { - csr = AT91_MC_SMC_DBW_16; - dev_dbg(&cf->pdev->dev, "16bit i/o bus\n"); - } - regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect), - AT91_MC_SMC_DBW, csr); - - io->start = cf->socket.io_offset; - io->stop = io->start + SZ_2K - 1; - - return 0; -} - -/* pcmcia layer maps/unmaps mem regions */ -static int -at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map) -{ - struct at91_cf_socket *cf; - - if (map->card_start) - return -EINVAL; - - cf = container_of(s, struct at91_cf_socket, socket); - - map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT); - if (map->flags & MAP_ATTRIB) - map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS; - else - map->static_start = cf->phys_baseaddr + CF_MEM_PHYS; - - return 0; -} - -static struct pccard_operations at91_cf_ops = { - .init = at91_cf_ss_init, - .suspend = at91_cf_ss_suspend, - .get_status = at91_cf_get_status, - .set_socket = at91_cf_set_socket, - .set_io_map = at91_cf_set_io_map, - .set_mem_map = at91_cf_set_mem_map, -}; - -/*--------------------------------------------------------------------------*/ - -#if defined(CONFIG_OF) -static const struct of_device_id at91_cf_dt_ids[] = { - { .compatible = "atmel,at91rm9200-cf" }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, at91_cf_dt_ids); - -static int at91_cf_dt_init(struct platform_device *pdev) -{ - struct at91_cf_data *board; - - board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL); - if (!board) - return -ENOMEM; - - board->irq_pin = of_get_gpio(pdev->dev.of_node, 0); - board->det_pin = of_get_gpio(pdev->dev.of_node, 1); - board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2); - board->rst_pin = of_get_gpio(pdev->dev.of_node, 3); - - pdev->dev.platform_data = board; - - mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc"); - - return PTR_ERR_OR_ZERO(mc); -} -#else -static int at91_cf_dt_init(struct platform_device *pdev) -{ - return -ENODEV; -} -#endif - -static int at91_cf_probe(struct platform_device *pdev) -{ - struct at91_cf_socket *cf; - struct at91_cf_data *board = pdev->dev.platform_data; - struct resource *io; - int status; - - if (!board) { - status = at91_cf_dt_init(pdev); - if (status) - return status; - - board = pdev->dev.platform_data; - } - - if (!gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin)) - return -ENODEV; - - io = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!io) - return -ENODEV; - - cf = devm_kzalloc(&pdev->dev, sizeof(*cf), GFP_KERNEL); - if (!cf) - return -ENOMEM; - - cf->board = board; - cf->pdev = pdev; - cf->phys_baseaddr = io->start; - platform_set_drvdata(pdev, cf); - - /* must be a GPIO; ergo must trigger on both edges */ - status = devm_gpio_request(&pdev->dev, board->det_pin, "cf_det"); - if (status < 0) - return status; - - status = devm_request_irq(&pdev->dev, gpio_to_irq(board->det_pin), - at91_cf_irq, 0, "at91_cf detect", cf); - if (status < 0) - return status; - - device_init_wakeup(&pdev->dev, 1); - - status = devm_gpio_request(&pdev->dev, board->rst_pin, "cf_rst"); - if (status < 0) - goto fail0a; - - if (gpio_is_valid(board->vcc_pin)) { - status = devm_gpio_request(&pdev->dev, board->vcc_pin, "cf_vcc"); - if (status < 0) - goto fail0a; - } - - /* - * The card driver will request this irq later as needed. - * but it causes lots of "irqNN: nobody cared" messages - * unless we report that we handle everything (sigh). - * (Note: DK board doesn't wire the IRQ pin...) - */ - if (gpio_is_valid(board->irq_pin)) { - status = devm_gpio_request(&pdev->dev, board->irq_pin, "cf_irq"); - if (status < 0) - goto fail0a; - - status = devm_request_irq(&pdev->dev, gpio_to_irq(board->irq_pin), - at91_cf_irq, IRQF_SHARED, "at91_cf", cf); - if (status < 0) - goto fail0a; - cf->socket.pci_irq = gpio_to_irq(board->irq_pin); - } else - cf->socket.pci_irq = nr_irqs + 1; - - /* - * pcmcia layer only remaps "real" memory not iospace - * io_offset is set to 0x10000 to avoid the check in static_find_io(). - * */ - cf->socket.io_offset = 0x10000; - status = pci_ioremap_io(0x10000, cf->phys_baseaddr + CF_IO_PHYS); - if (status) - goto fail0a; - - /* reserve chip-select regions */ - if (!devm_request_mem_region(&pdev->dev, io->start, resource_size(io), "at91_cf")) { - status = -ENXIO; - goto fail0a; - } - - dev_info(&pdev->dev, "irqs det #%d, io #%d\n", - gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin)); - - cf->socket.owner = THIS_MODULE; - cf->socket.dev.parent = &pdev->dev; - cf->socket.ops = &at91_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; - cf->socket.io[0].res = io; - - status = pcmcia_register_socket(&cf->socket); - if (status < 0) - goto fail0a; - - return 0; - -fail0a: - device_init_wakeup(&pdev->dev, 0); - return status; -} - -static int at91_cf_remove(struct platform_device *pdev) -{ - struct at91_cf_socket *cf = platform_get_drvdata(pdev); - - pcmcia_unregister_socket(&cf->socket); - device_init_wakeup(&pdev->dev, 0); - - return 0; -} - -#ifdef CONFIG_PM - -static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg) -{ - struct at91_cf_socket *cf = platform_get_drvdata(pdev); - struct at91_cf_data *board = cf->board; - - if (device_may_wakeup(&pdev->dev)) { - enable_irq_wake(gpio_to_irq(board->det_pin)); - if (gpio_is_valid(board->irq_pin)) - enable_irq_wake(gpio_to_irq(board->irq_pin)); - } - return 0; -} - -static int at91_cf_resume(struct platform_device *pdev) -{ - struct at91_cf_socket *cf = platform_get_drvdata(pdev); - struct at91_cf_data *board = cf->board; - - if (device_may_wakeup(&pdev->dev)) { - disable_irq_wake(gpio_to_irq(board->det_pin)); - if (gpio_is_valid(board->irq_pin)) - disable_irq_wake(gpio_to_irq(board->irq_pin)); - } - - return 0; -} - -#else -#define at91_cf_suspend NULL -#define at91_cf_resume NULL -#endif - -static struct platform_driver at91_cf_driver = { - .driver = { - .name = "at91_cf", - .of_match_table = of_match_ptr(at91_cf_dt_ids), - }, - .probe = at91_cf_probe, - .remove = at91_cf_remove, - .suspend = at91_cf_suspend, - .resume = at91_cf_resume, -}; - -module_platform_driver(at91_cf_driver); - -MODULE_DESCRIPTION("AT91 Compact Flash Driver"); -MODULE_AUTHOR("David Brownell"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:at91_cf"); |