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![Paul Gortmaker](/assets/img/avatar_default.png)
This file is built off of a tristate Kconfig option and also contains modular function calls so it should explicitly include module.h to avoid compile breakage during header shuffles done in the future. Cc: Wolfram Sang <wsa@the-dreams.de> Acked-by: Wolfram Sang <wsa@the-dreams.de> Cc: linux-pcmcia@lists.infradead.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
327 lines
7.8 KiB
C
327 lines
7.8 KiB
C
/*
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* PCMCIA socket code for the MyCable XXS1500 system.
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*
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* Copyright (c) 2009 Manuel Lauss <manuel.lauss@gmail.com>
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*
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*/
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/resource.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cistpl.h>
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#include <asm/irq.h>
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#include <asm/mach-au1x00/au1000.h>
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#define MEM_MAP_SIZE 0x400000
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#define IO_MAP_SIZE 0x1000
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/*
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* 3.3V cards only; all interfacing is done via gpios:
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*
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* 0/1: carddetect (00 = card present, xx = huh)
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* 4: card irq
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* 204: reset (high-act)
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* 205: buffer enable (low-act)
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* 208/209: card voltage key (00,01,10,11)
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* 210: battwarn
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* 211: batdead
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* 214: power (low-act)
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*/
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#define GPIO_CDA 0
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#define GPIO_CDB 1
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#define GPIO_CARDIRQ 4
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#define GPIO_RESET 204
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#define GPIO_OUTEN 205
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#define GPIO_VSL 208
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#define GPIO_VSH 209
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#define GPIO_BATTDEAD 210
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#define GPIO_BATTWARN 211
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#define GPIO_POWER 214
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struct xxs1500_pcmcia_sock {
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struct pcmcia_socket socket;
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void *virt_io;
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phys_addr_t phys_io;
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phys_addr_t phys_attr;
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phys_addr_t phys_mem;
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/* previous flags for set_socket() */
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unsigned int old_flags;
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};
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#define to_xxs_socket(x) container_of(x, struct xxs1500_pcmcia_sock, socket)
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static irqreturn_t cdirq(int irq, void *data)
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{
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struct xxs1500_pcmcia_sock *sock = data;
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pcmcia_parse_events(&sock->socket, SS_DETECT);
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return IRQ_HANDLED;
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}
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static int xxs1500_pcmcia_configure(struct pcmcia_socket *skt,
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struct socket_state_t *state)
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{
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struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
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unsigned int changed;
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/* power control */
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switch (state->Vcc) {
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case 0:
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gpio_set_value(GPIO_POWER, 1); /* power off */
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break;
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case 33:
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gpio_set_value(GPIO_POWER, 0); /* power on */
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break;
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case 50:
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default:
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return -EINVAL;
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}
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changed = state->flags ^ sock->old_flags;
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if (changed & SS_RESET) {
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if (state->flags & SS_RESET) {
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gpio_set_value(GPIO_RESET, 1); /* assert reset */
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gpio_set_value(GPIO_OUTEN, 1); /* buffers off */
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} else {
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gpio_set_value(GPIO_RESET, 0); /* deassert reset */
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gpio_set_value(GPIO_OUTEN, 0); /* buffers on */
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msleep(500);
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}
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}
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sock->old_flags = state->flags;
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return 0;
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}
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static int xxs1500_pcmcia_get_status(struct pcmcia_socket *skt,
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unsigned int *value)
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{
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unsigned int status;
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int i;
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status = 0;
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/* check carddetects: GPIO[0:1] must both be low */
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if (!gpio_get_value(GPIO_CDA) && !gpio_get_value(GPIO_CDB))
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status |= SS_DETECT;
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/* determine card voltage: GPIO[208:209] binary value */
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i = (!!gpio_get_value(GPIO_VSL)) | ((!!gpio_get_value(GPIO_VSH)) << 1);
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switch (i) {
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case 0:
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case 1:
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case 2:
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status |= SS_3VCARD; /* 3V card */
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break;
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case 3: /* 5V card, unsupported */
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default:
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status |= SS_XVCARD; /* treated as unsupported in core */
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}
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/* GPIO214: low active power switch */
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status |= gpio_get_value(GPIO_POWER) ? 0 : SS_POWERON;
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/* GPIO204: high-active reset line */
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status |= gpio_get_value(GPIO_RESET) ? SS_RESET : SS_READY;
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/* other stuff */
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status |= gpio_get_value(GPIO_BATTDEAD) ? 0 : SS_BATDEAD;
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status |= gpio_get_value(GPIO_BATTWARN) ? 0 : SS_BATWARN;
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*value = status;
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return 0;
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}
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static int xxs1500_pcmcia_sock_init(struct pcmcia_socket *skt)
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{
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gpio_direction_input(GPIO_CDA);
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gpio_direction_input(GPIO_CDB);
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gpio_direction_input(GPIO_VSL);
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gpio_direction_input(GPIO_VSH);
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gpio_direction_input(GPIO_BATTDEAD);
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gpio_direction_input(GPIO_BATTWARN);
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gpio_direction_output(GPIO_RESET, 1); /* assert reset */
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gpio_direction_output(GPIO_OUTEN, 1); /* disable buffers */
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gpio_direction_output(GPIO_POWER, 1); /* power off */
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return 0;
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}
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static int xxs1500_pcmcia_sock_suspend(struct pcmcia_socket *skt)
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{
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return 0;
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}
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static int au1x00_pcmcia_set_io_map(struct pcmcia_socket *skt,
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struct pccard_io_map *map)
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{
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struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
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map->start = (u32)sock->virt_io;
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map->stop = map->start + IO_MAP_SIZE;
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return 0;
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}
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static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *skt,
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struct pccard_mem_map *map)
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{
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struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
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if (map->flags & MAP_ATTRIB)
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map->static_start = sock->phys_attr + map->card_start;
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else
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map->static_start = sock->phys_mem + map->card_start;
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return 0;
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}
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static struct pccard_operations xxs1500_pcmcia_operations = {
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.init = xxs1500_pcmcia_sock_init,
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.suspend = xxs1500_pcmcia_sock_suspend,
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.get_status = xxs1500_pcmcia_get_status,
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.set_socket = xxs1500_pcmcia_configure,
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.set_io_map = au1x00_pcmcia_set_io_map,
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.set_mem_map = au1x00_pcmcia_set_mem_map,
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};
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static int xxs1500_pcmcia_probe(struct platform_device *pdev)
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{
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struct xxs1500_pcmcia_sock *sock;
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struct resource *r;
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int ret, irq;
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sock = kzalloc(sizeof(struct xxs1500_pcmcia_sock), GFP_KERNEL);
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if (!sock)
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return -ENOMEM;
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ret = -ENODEV;
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/* 36bit PCMCIA Attribute area address */
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r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-attr");
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if (!r) {
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dev_err(&pdev->dev, "missing 'pcmcia-attr' resource!\n");
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goto out0;
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}
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sock->phys_attr = r->start;
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/* 36bit PCMCIA Memory area address */
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r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-mem");
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if (!r) {
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dev_err(&pdev->dev, "missing 'pcmcia-mem' resource!\n");
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goto out0;
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}
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sock->phys_mem = r->start;
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/* 36bit PCMCIA IO area address */
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r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-io");
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if (!r) {
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dev_err(&pdev->dev, "missing 'pcmcia-io' resource!\n");
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goto out0;
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}
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sock->phys_io = r->start;
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/*
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* PCMCIA client drivers use the inb/outb macros to access
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* the IO registers. Since mips_io_port_base is added
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* to the access address of the mips implementation of
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* inb/outb, we need to subtract it here because we want
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* to access the I/O or MEM address directly, without
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* going through this "mips_io_port_base" mechanism.
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*/
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sock->virt_io = (void *)(ioremap(sock->phys_io, IO_MAP_SIZE) -
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mips_io_port_base);
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if (!sock->virt_io) {
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dev_err(&pdev->dev, "cannot remap IO area\n");
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ret = -ENOMEM;
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goto out0;
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}
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sock->socket.ops = &xxs1500_pcmcia_operations;
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sock->socket.owner = THIS_MODULE;
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sock->socket.pci_irq = gpio_to_irq(GPIO_CARDIRQ);
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sock->socket.features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD;
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sock->socket.map_size = MEM_MAP_SIZE;
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sock->socket.io_offset = (unsigned long)sock->virt_io;
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sock->socket.dev.parent = &pdev->dev;
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sock->socket.resource_ops = &pccard_static_ops;
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platform_set_drvdata(pdev, sock);
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/* setup carddetect irq: use one of the 2 GPIOs as an
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* edge detector.
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*/
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irq = gpio_to_irq(GPIO_CDA);
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irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
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ret = request_irq(irq, cdirq, 0, "pcmcia_carddetect", sock);
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if (ret) {
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dev_err(&pdev->dev, "cannot setup cd irq\n");
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goto out1;
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}
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ret = pcmcia_register_socket(&sock->socket);
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if (ret) {
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dev_err(&pdev->dev, "failed to register\n");
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goto out2;
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}
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printk(KERN_INFO "MyCable XXS1500 PCMCIA socket services\n");
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return 0;
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out2:
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free_irq(gpio_to_irq(GPIO_CDA), sock);
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out1:
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iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
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out0:
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kfree(sock);
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return ret;
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}
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static int xxs1500_pcmcia_remove(struct platform_device *pdev)
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{
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struct xxs1500_pcmcia_sock *sock = platform_get_drvdata(pdev);
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pcmcia_unregister_socket(&sock->socket);
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free_irq(gpio_to_irq(GPIO_CDA), sock);
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iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
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kfree(sock);
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return 0;
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}
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static struct platform_driver xxs1500_pcmcia_socket_driver = {
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.driver = {
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.name = "xxs1500_pcmcia",
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},
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.probe = xxs1500_pcmcia_probe,
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.remove = xxs1500_pcmcia_remove,
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};
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module_platform_driver(xxs1500_pcmcia_socket_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("PCMCIA Socket Services for MyCable XXS1500 systems");
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MODULE_AUTHOR("Manuel Lauss");
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