MIPS: Alchemy: XXS1500 PCMCIA driver rewrite
Rewritten XXS1500 PCMCIA socket driver, standalone (doesn't depend on
au1000_generic.c) and added carddetect IRQ support.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Linux-PCMCIA <linux-pcmcia@lists.infradead.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/drivers/pcmcia/xxs1500_ss.c b/drivers/pcmcia/xxs1500_ss.c
new file mode 100644
index 0000000..4e36930
--- /dev/null
+++ b/drivers/pcmcia/xxs1500_ss.c
@@ -0,0 +1,357 @@
+/*
+ * PCMCIA socket code for the MyCable XXS1500 system.
+ *
+ * Copyright (c) 2009 Manuel Lauss <manuel.lauss@gmail.com>
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/resource.h>
+#include <linux/spinlock.h>
+
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/cistpl.h>
+
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/mach-au1x00/au1000.h>
+
+#define MEM_MAP_SIZE 0x400000
+#define IO_MAP_SIZE 0x1000
+
+
+/*
+ * 3.3V cards only; all interfacing is done via gpios:
+ *
+ * 0/1: carddetect (00 = card present, xx = huh)
+ * 4: card irq
+ * 204: reset (high-act)
+ * 205: buffer enable (low-act)
+ * 208/209: card voltage key (00,01,10,11)
+ * 210: battwarn
+ * 211: batdead
+ * 214: power (low-act)
+ */
+#define GPIO_CDA 0
+#define GPIO_CDB 1
+#define GPIO_CARDIRQ 4
+#define GPIO_RESET 204
+#define GPIO_OUTEN 205
+#define GPIO_VSL 208
+#define GPIO_VSH 209
+#define GPIO_BATTDEAD 210
+#define GPIO_BATTWARN 211
+#define GPIO_POWER 214
+
+struct xxs1500_pcmcia_sock {
+ struct pcmcia_socket socket;
+ void *virt_io;
+
+ /* the "pseudo" addresses of the PCMCIA space. */
+ unsigned long phys_io;
+ unsigned long phys_attr;
+ unsigned long phys_mem;
+
+ /* previous flags for set_socket() */
+ unsigned int old_flags;
+};
+
+#define to_xxs_socket(x) container_of(x, struct xxs1500_pcmcia_sock, socket)
+
+static irqreturn_t cdirq(int irq, void *data)
+{
+ struct xxs1500_pcmcia_sock *sock = data;
+
+ pcmcia_parse_events(&sock->socket, SS_DETECT);
+
+ return IRQ_HANDLED;
+}
+
+static int xxs1500_pcmcia_configure(struct pcmcia_socket *skt,
+ struct socket_state_t *state)
+{
+ struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
+ unsigned int changed;
+
+ /* power control */
+ switch (state->Vcc) {
+ case 0:
+ gpio_set_value(GPIO_POWER, 1); /* power off */
+ break;
+ case 33:
+ gpio_set_value(GPIO_POWER, 0); /* power on */
+ break;
+ case 50:
+ default:
+ return -EINVAL;
+ }
+
+ changed = state->flags ^ sock->old_flags;
+
+ if (changed & SS_RESET) {
+ if (state->flags & SS_RESET) {
+ gpio_set_value(GPIO_RESET, 1); /* assert reset */
+ gpio_set_value(GPIO_OUTEN, 1); /* buffers off */
+ } else {
+ gpio_set_value(GPIO_RESET, 0); /* deassert reset */
+ gpio_set_value(GPIO_OUTEN, 0); /* buffers on */
+ msleep(500);
+ }
+ }
+
+ sock->old_flags = state->flags;
+
+ return 0;
+}
+
+static int xxs1500_pcmcia_get_status(struct pcmcia_socket *skt,
+ unsigned int *value)
+{
+ unsigned int status;
+ int i;
+
+ status = 0;
+
+ /* check carddetects: GPIO[0:1] must both be low */
+ if (!gpio_get_value(GPIO_CDA) && !gpio_get_value(GPIO_CDB))
+ status |= SS_DETECT;
+
+ /* determine card voltage: GPIO[208:209] binary value */
+ i = (!!gpio_get_value(GPIO_VSL)) | ((!!gpio_get_value(GPIO_VSH)) << 1);
+
+ switch (i) {
+ case 0:
+ case 1:
+ case 2:
+ status |= SS_3VCARD; /* 3V card */
+ break;
+ case 3: /* 5V card, unsupported */
+ default:
+ status |= SS_XVCARD; /* treated as unsupported in core */
+ }
+
+ /* GPIO214: low active power switch */
+ status |= gpio_get_value(GPIO_POWER) ? 0 : SS_POWERON;
+
+ /* GPIO204: high-active reset line */
+ status |= gpio_get_value(GPIO_RESET) ? SS_RESET : SS_READY;
+
+ /* other stuff */
+ status |= gpio_get_value(GPIO_BATTDEAD) ? 0 : SS_BATDEAD;
+ status |= gpio_get_value(GPIO_BATTWARN) ? 0 : SS_BATWARN;
+
+ *value = status;
+
+ return 0;
+}
+
+static int xxs1500_pcmcia_sock_init(struct pcmcia_socket *skt)
+{
+ gpio_direction_input(GPIO_CDA);
+ gpio_direction_input(GPIO_CDB);
+ gpio_direction_input(GPIO_VSL);
+ gpio_direction_input(GPIO_VSH);
+ gpio_direction_input(GPIO_BATTDEAD);
+ gpio_direction_input(GPIO_BATTWARN);
+ gpio_direction_output(GPIO_RESET, 1); /* assert reset */
+ gpio_direction_output(GPIO_OUTEN, 1); /* disable buffers */
+ gpio_direction_output(GPIO_POWER, 1); /* power off */
+
+ return 0;
+}
+
+static int xxs1500_pcmcia_sock_suspend(struct pcmcia_socket *skt)
+{
+ return 0;
+}
+
+static int au1x00_pcmcia_set_io_map(struct pcmcia_socket *skt,
+ struct pccard_io_map *map)
+{
+ struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
+
+ map->start = (u32)sock->virt_io;
+ map->stop = map->start + IO_MAP_SIZE;
+
+ return 0;
+}
+
+static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *skt,
+ struct pccard_mem_map *map)
+{
+ struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
+
+ if (map->flags & MAP_ATTRIB)
+ map->static_start = sock->phys_attr + map->card_start;
+ else
+ map->static_start = sock->phys_mem + map->card_start;
+
+ return 0;
+}
+
+static struct pccard_operations xxs1500_pcmcia_operations = {
+ .init = xxs1500_pcmcia_sock_init,
+ .suspend = xxs1500_pcmcia_sock_suspend,
+ .get_status = xxs1500_pcmcia_get_status,
+ .set_socket = xxs1500_pcmcia_configure,
+ .set_io_map = au1x00_pcmcia_set_io_map,
+ .set_mem_map = au1x00_pcmcia_set_mem_map,
+};
+
+static int __devinit xxs1500_pcmcia_probe(struct platform_device *pdev)
+{
+ struct xxs1500_pcmcia_sock *sock;
+ struct resource *r;
+ phys_t physio;
+ int ret, irq;
+
+ sock = kzalloc(sizeof(struct xxs1500_pcmcia_sock), GFP_KERNEL);
+ if (!sock)
+ return -ENOMEM;
+
+ ret = -ENODEV;
+
+ /*
+ * pseudo-attr: The 32bit address of the PCMCIA attribute space
+ * for this socket (usually the 36bit address shifted 4 to the
+ * right).
+ */
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pseudo-attr");
+ if (!r) {
+ dev_err(&pdev->dev, "missing 'pseudo-attr' resource!\n");
+ goto out0;
+ }
+ sock->phys_attr = r->start;
+
+ /*
+ * pseudo-mem: The 32bit address of the PCMCIA memory space for
+ * this socket (usually the 36bit address shifted 4 to the right)
+ */
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pseudo-mem");
+ if (!r) {
+ dev_err(&pdev->dev, "missing 'pseudo-mem' resource!\n");
+ goto out0;
+ }
+ sock->phys_mem = r->start;
+
+ /*
+ * pseudo-io: The 32bit address of the PCMCIA IO space for this
+ * socket (usually the 36bit address shifted 4 to the right).
+ */
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pseudo-io");
+ if (!r) {
+ dev_err(&pdev->dev, "missing 'pseudo-io' resource!\n");
+ goto out0;
+ }
+ sock->phys_io = r->start;
+
+
+ /* for io must remap the full 36bit address (for reference see
+ * alchemy/common/setup.c::__fixup_bigphys_addr)
+ */
+ physio = ((phys_t)sock->phys_io) << 4;
+
+ /*
+ * PCMCIA client drivers use the inb/outb macros to access
+ * the IO registers. Since mips_io_port_base is added
+ * to the access address of the mips implementation of
+ * inb/outb, we need to subtract it here because we want
+ * to access the I/O or MEM address directly, without
+ * going through this "mips_io_port_base" mechanism.
+ */
+ sock->virt_io = (void *)(ioremap(physio, IO_MAP_SIZE) -
+ mips_io_port_base);
+
+ if (!sock->virt_io) {
+ dev_err(&pdev->dev, "cannot remap IO area\n");
+ ret = -ENOMEM;
+ goto out0;
+ }
+
+ sock->socket.ops = &xxs1500_pcmcia_operations;
+ sock->socket.owner = THIS_MODULE;
+ sock->socket.pci_irq = gpio_to_irq(GPIO_CARDIRQ);
+ sock->socket.features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD;
+ sock->socket.map_size = MEM_MAP_SIZE;
+ sock->socket.io_offset = (unsigned long)sock->virt_io;
+ sock->socket.dev.parent = &pdev->dev;
+ sock->socket.resource_ops = &pccard_static_ops;
+
+ platform_set_drvdata(pdev, sock);
+
+ /* setup carddetect irq: use one of the 2 GPIOs as an
+ * edge detector.
+ */
+ irq = gpio_to_irq(GPIO_CDA);
+ set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
+ ret = request_irq(irq, cdirq, 0, "pcmcia_carddetect", sock);
+ if (ret) {
+ dev_err(&pdev->dev, "cannot setup cd irq\n");
+ goto out1;
+ }
+
+ ret = pcmcia_register_socket(&sock->socket);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register\n");
+ goto out2;
+ }
+
+ printk(KERN_INFO "MyCable XXS1500 PCMCIA socket services\n");
+
+ return 0;
+
+out2:
+ free_irq(gpio_to_irq(GPIO_CDA), sock);
+out1:
+ iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
+out0:
+ kfree(sock);
+ return ret;
+}
+
+static int __devexit xxs1500_pcmcia_remove(struct platform_device *pdev)
+{
+ struct xxs1500_pcmcia_sock *sock = platform_get_drvdata(pdev);
+
+ pcmcia_unregister_socket(&sock->socket);
+ free_irq(gpio_to_irq(GPIO_CDA), sock);
+ iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
+ kfree(sock);
+
+ return 0;
+}
+
+static struct platform_driver xxs1500_pcmcia_socket_driver = {
+ .driver = {
+ .name = "xxs1500_pcmcia",
+ .owner = THIS_MODULE,
+ },
+ .probe = xxs1500_pcmcia_probe,
+ .remove = __devexit_p(xxs1500_pcmcia_remove),
+};
+
+int __init xxs1500_pcmcia_socket_load(void)
+{
+ return platform_driver_register(&xxs1500_pcmcia_socket_driver);
+}
+
+void __exit xxs1500_pcmcia_socket_unload(void)
+{
+ platform_driver_unregister(&xxs1500_pcmcia_socket_driver);
+}
+
+module_init(xxs1500_pcmcia_socket_load);
+module_exit(xxs1500_pcmcia_socket_unload);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PCMCIA Socket Services for MyCable XXS1500 systems");
+MODULE_AUTHOR("Manuel Lauss");