diff options
Diffstat (limited to 'drivers/pcmcia/pxa2xx_balloon3.c')
| -rw-r--r-- | drivers/pcmcia/pxa2xx_balloon3.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_balloon3.c b/drivers/pcmcia/pxa2xx_balloon3.c new file mode 100644 index 0000000..dbbdd00 --- /dev/null +++ b/drivers/pcmcia/pxa2xx_balloon3.c @@ -0,0 +1,158 @@ +/* + * linux/drivers/pcmcia/pxa2xx_balloon3.c + * + * Balloon3 PCMCIA specific routines. + * + * Author: Nick Bane + * Created: June, 2006 + * Copyright: Toby Churchill Ltd + * Derived from pxa2xx_mainstone.c, by Nico Pitre + * + * Various modification by Marek Vasut <marek.vasut@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/gpio.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/irq.h> +#include <linux/io.h> + +#include <mach/balloon3.h> + +#include "soc_common.h" + +/* + * These are a list of interrupt sources that provokes a polled + * check of status + */ +static struct pcmcia_irqs irqs[] = { + { 0, BALLOON3_S0_CD_IRQ, "PCMCIA0 CD" }, + { 0, BALLOON3_BP_NSTSCHG_IRQ, "PCMCIA0 STSCHG" }, +}; + +static int balloon3_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + uint16_t ver; + int ret; + static void __iomem *fpga_ver; + + ver = __raw_readw(BALLOON3_FPGA_VER); + if (ver > 0x0201) + pr_warn("The FPGA code, version 0x%04x, is newer than rel-0.3. " + "PCMCIA/CF support might be broken in this version!", + ver); + + skt->socket.pci_irq = BALLOON3_BP_CF_NRDY_IRQ; + return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); +} + +static void balloon3_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) +{ + soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); +} + +static unsigned long balloon3_pcmcia_status[2] = { + BALLOON3_CF_nSTSCHG_BVD1, + BALLOON3_CF_nSTSCHG_BVD1 +}; + +static void balloon3_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + uint16_t status; + int flip; + + /* This actually reads the STATUS register */ + status = __raw_readw(BALLOON3_CF_STATUS_REG); + flip = (status ^ balloon3_pcmcia_status[skt->nr]) + & BALLOON3_CF_nSTSCHG_BVD1; + /* + * Workaround for STSCHG which can't be deasserted: + * We therefore disable/enable corresponding IRQs + * as needed to avoid IRQ locks. + */ + if (flip) { + balloon3_pcmcia_status[skt->nr] = status; + if (status & BALLOON3_CF_nSTSCHG_BVD1) + enable_irq(BALLOON3_BP_NSTSCHG_IRQ); + else + disable_irq(BALLOON3_BP_NSTSCHG_IRQ); + } + + state->detect = !gpio_get_value(BALLOON3_GPIO_S0_CD); + state->ready = !!(status & BALLOON3_CF_nIRQ); + state->bvd1 = !!(status & BALLOON3_CF_nSTSCHG_BVD1); + state->bvd2 = 0; /* not available */ + state->vs_3v = 1; /* Always true its a CF card */ + state->vs_Xv = 0; /* not available */ + state->wrprot = 0; /* not available */ +} + +static int balloon3_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + __raw_writew((state->flags & SS_RESET) ? BALLOON3_CF_RESET : 0, + BALLOON3_CF_CONTROL_REG); + return 0; +} + +static void balloon3_pcmcia_socket_init(struct soc_pcmcia_socket *skt) +{ +} + +static void balloon3_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) +{ +} + +static struct pcmcia_low_level balloon3_pcmcia_ops = { + .owner = THIS_MODULE, + .hw_init = balloon3_pcmcia_hw_init, + .hw_shutdown = balloon3_pcmcia_hw_shutdown, + .socket_state = balloon3_pcmcia_socket_state, + .configure_socket = balloon3_pcmcia_configure_socket, + .socket_init = balloon3_pcmcia_socket_init, + .socket_suspend = balloon3_pcmcia_socket_suspend, + .first = 0, + .nr = 1, +}; + +static struct platform_device *balloon3_pcmcia_device; + +static int __init balloon3_pcmcia_init(void) +{ + int ret; + + balloon3_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + if (!balloon3_pcmcia_device) + return -ENOMEM; + + ret = platform_device_add_data(balloon3_pcmcia_device, + &balloon3_pcmcia_ops, sizeof(balloon3_pcmcia_ops)); + + if (!ret) + ret = platform_device_add(balloon3_pcmcia_device); + + if (ret) + platform_device_put(balloon3_pcmcia_device); + + return ret; +} + +static void __exit balloon3_pcmcia_exit(void) +{ + platform_device_unregister(balloon3_pcmcia_device); +} + +module_init(balloon3_pcmcia_init); +module_exit(balloon3_pcmcia_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Nick Bane <nick@cecomputing.co.uk>"); +MODULE_ALIAS("platform:pxa2xx-pcmcia"); +MODULE_DESCRIPTION("Balloon3 board CF/PCMCIA driver"); |