[PATCH] USB: add sl811_cs support
This adds support for a CF-card USB Host adapter, the Ratoc REX-CFU1U, by
wrapping a PCMCIA driver around the existing "sl811-hcd" platform driver.
This CF card is especially useful for PDAs, which currently tend to have
no other solution for USB host capability.
From: Botond Botyanszki <boti@rocketmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/sl811_cs.c b/drivers/usb/host/sl811_cs.c
new file mode 100644
index 0000000..6e17326
--- /dev/null
+++ b/drivers/usb/host/sl811_cs.c
@@ -0,0 +1,442 @@
+/*
+ * PCMCIA driver for SL811HS (as found in REX-CFU1U)
+ * Filename: sl811_cs.c
+ * Author: Yukio Yamamoto
+ *
+ * Port to sl811-hcd and 2.6.x by
+ * Botond Botyanszki <boti@rocketmail.com>
+ * Simon Pickering
+ *
+ * Last update: 2005-05-12
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/ioport.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+
+#include <linux/usb_sl811.h>
+
+MODULE_AUTHOR("Botond Botyanszki");
+MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
+MODULE_LICENSE("GPL");
+
+
+/*====================================================================*/
+/* MACROS */
+/*====================================================================*/
+
+#if defined(DEBUG) || defined(CONFIG_USB_DEBUG) || defined(PCMCIA_DEBUG)
+
+static int pc_debug = 0;
+module_param(pc_debug, int, 0644);
+
+#define DBG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG "sl811_cs: " args)
+
+#else
+#define DBG(n, args...) do{}while(0)
+#endif /* no debugging */
+
+#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
+
+#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
+
+#define CS_CHECK(fn, ret) \
+ do { \
+ last_fn = (fn); \
+ if ((last_ret = (ret)) != 0) \
+ goto cs_failed; \
+ } while (0)
+
+/*====================================================================*/
+/* VARIABLES */
+/*====================================================================*/
+
+static const char driver_name[DEV_NAME_LEN] = "sl811_cs";
+
+static dev_link_t *dev_list = NULL;
+
+static int irq_list[4] = { -1 };
+static int irq_list_count;
+
+module_param_array(irq_list, int, &irq_list_count, 0444);
+
+INT_MODULE_PARM(irq_mask, 0xdeb8);
+
+typedef struct local_info_t {
+ dev_link_t link;
+ dev_node_t node;
+} local_info_t;
+
+/*====================================================================*/
+
+static void release_platform_dev(struct device * dev)
+{
+ DBG(0, "sl811_cs platform_dev release\n");
+ dev->parent = NULL;
+}
+
+static struct sl811_platform_data platform_data = {
+ .potpg = 100,
+ .power = 50, /* == 100mA */
+ // .reset = ... FIXME: invoke CF reset on the card
+};
+
+static struct resource resources[] = {
+ [0] = {
+ .flags = IORESOURCE_IRQ,
+ },
+ [1] = {
+ // .name = "address",
+ .flags = IORESOURCE_IO,
+ },
+ [2] = {
+ // .name = "data",
+ .flags = IORESOURCE_IO,
+ },
+};
+
+extern struct device_driver sl811h_driver;
+
+static struct platform_device platform_dev = {
+ .id = -1,
+ .dev = {
+ .platform_data = &platform_data,
+ .release = release_platform_dev,
+ },
+ .resource = resources,
+ .num_resources = ARRAY_SIZE(resources),
+};
+
+static int sl811_hc_init(struct device *parent, ioaddr_t base_addr, int irq)
+{
+ if (platform_dev.dev.parent)
+ return -EBUSY;
+ platform_dev.dev.parent = parent;
+
+ /* finish seting up the platform device */
+ resources[0].start = irq;
+
+ resources[1].start = base_addr;
+ resources[1].end = base_addr;
+
+ resources[2].start = base_addr + 1;
+ resources[2].end = base_addr + 1;
+
+ /* The driver core will probe for us. We know sl811-hcd has been
+ * initialized already because of the link order dependency.
+ */
+ platform_dev.name = sl811h_driver.name;
+ return platform_device_register(&platform_dev);
+}
+
+/*====================================================================*/
+
+static void sl811_cs_detach(dev_link_t *link)
+{
+ dev_link_t **linkp;
+
+ DBG(0, "sl811_cs_detach(0x%p)\n", link);
+
+ /* Locate device structure */
+ for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) {
+ if (*linkp == link)
+ break;
+ }
+ if (*linkp == NULL)
+ return;
+
+ /* Break the link with Card Services */
+ if (link->handle)
+ pcmcia_deregister_client(link->handle);
+
+ /* Unlink device structure, and free it */
+ *linkp = link->next;
+ /* This points to the parent local_info_t struct */
+ kfree(link->priv);
+}
+
+static void sl811_cs_release(dev_link_t * link)
+{
+
+ DBG(0, "sl811_cs_release(0x%p)\n", link);
+
+ if (link->open) {
+ DBG(1, "sl811_cs: release postponed, '%s' still open\n",
+ link->dev->dev_name);
+ link->state |= DEV_STALE_CONFIG;
+ return;
+ }
+
+ /* Unlink the device chain */
+ link->dev = NULL;
+
+ platform_device_unregister(&platform_dev);
+ pcmcia_release_configuration(link->handle);
+ if (link->io.NumPorts1)
+ pcmcia_release_io(link->handle, &link->io);
+ if (link->irq.AssignedIRQ)
+ pcmcia_release_irq(link->handle, &link->irq);
+ link->state &= ~DEV_CONFIG;
+
+ if (link->state & DEV_STALE_LINK)
+ sl811_cs_detach(link);
+}
+
+static void sl811_cs_config(dev_link_t *link)
+{
+ client_handle_t handle = link->handle;
+ struct device *parent = &handle_to_dev(handle);
+ local_info_t *dev = link->priv;
+ tuple_t tuple;
+ cisparse_t parse;
+ int last_fn, last_ret;
+ u_char buf[64];
+ config_info_t conf;
+ cistpl_cftable_entry_t dflt = { 0 };
+
+ DBG(0, "sl811_cs_config(0x%p)\n", link);
+
+ tuple.DesiredTuple = CISTPL_CONFIG;
+ tuple.Attributes = 0;
+ tuple.TupleData = buf;
+ tuple.TupleDataMax = sizeof(buf);
+ tuple.TupleOffset = 0;
+ CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+ CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+ CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
+ link->conf.ConfigBase = parse.config.base;
+ link->conf.Present = parse.config.rmask[0];
+
+ /* Configure card */
+ link->state |= DEV_CONFIG;
+
+ /* Look up the current Vcc */
+ CS_CHECK(GetConfigurationInfo,
+ pcmcia_get_configuration_info(handle, &conf));
+ link->conf.Vcc = conf.Vcc;
+
+ tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+ CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+ while (1) {
+ cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
+
+ if (pcmcia_get_tuple_data(handle, &tuple) != 0
+ || pcmcia_parse_tuple(handle, &tuple, &parse)
+ != 0)
+ goto next_entry;
+
+ if (cfg->flags & CISTPL_CFTABLE_DEFAULT) {
+ dflt = *cfg;
+ }
+
+ if (cfg->index == 0)
+ goto next_entry;
+
+ link->conf.ConfigIndex = cfg->index;
+
+ /* Use power settings for Vcc and Vpp if present */
+ /* Note that the CIS values need to be rescaled */
+ if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
+ if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000
+ != conf.Vcc)
+ goto next_entry;
+ } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
+ if (dflt.vcc.param[CISTPL_POWER_VNOM]/10000
+ != conf.Vcc)
+ goto next_entry;
+ }
+
+ if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
+ link->conf.Vpp1 = link->conf.Vpp2 =
+ cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
+ else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
+ link->conf.Vpp1 = link->conf.Vpp2 =
+ dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
+
+ /* we need an interrupt */
+ if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
+ link->conf.Attributes |= CONF_ENABLE_IRQ;
+
+ /* IO window settings */
+ link->io.NumPorts1 = link->io.NumPorts2 = 0;
+ if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
+ cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
+
+ link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+ link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
+ link->io.BasePort1 = io->win[0].base;
+ link->io.NumPorts1 = io->win[0].len;
+
+ if (pcmcia_request_io(link->handle, &link->io) != 0)
+ goto next_entry;
+ }
+ break;
+
+next_entry:
+ if (link->io.NumPorts1)
+ pcmcia_release_io(link->handle, &link->io);
+ last_ret = pcmcia_get_next_tuple(handle, &tuple);
+ }
+
+ /* require an IRQ and two registers */
+ if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
+ goto cs_failed;
+ if (link->conf.Attributes & CONF_ENABLE_IRQ)
+ CS_CHECK(RequestIRQ,
+ pcmcia_request_irq(link->handle, &link->irq));
+ else
+ goto cs_failed;
+
+ CS_CHECK(RequestConfiguration,
+ pcmcia_request_configuration(link->handle, &link->conf));
+
+ sprintf(dev->node.dev_name, driver_name);
+ dev->node.major = dev->node.minor = 0;
+ link->dev = &dev->node;
+
+ printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
+ dev->node.dev_name, link->conf.ConfigIndex,
+ link->conf.Vcc/10, link->conf.Vcc%10);
+ if (link->conf.Vpp1)
+ printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
+ printk(", irq %d", link->irq.AssignedIRQ);
+ printk(", io 0x%04x-0x%04x", link->io.BasePort1,
+ link->io.BasePort1+link->io.NumPorts1-1);
+ printk("\n");
+
+ link->state &= ~DEV_CONFIG_PENDING;
+
+ if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
+ < 0) {
+cs_failed:
+ printk("sl811_cs_config failed\n");
+ cs_error(link->handle, last_fn, last_ret);
+ sl811_cs_release(link);
+ link->state &= ~DEV_CONFIG_PENDING;
+ }
+}
+
+static int
+sl811_cs_event(event_t event, int priority, event_callback_args_t *args)
+{
+ dev_link_t *link = args->client_data;
+
+ DBG(1, "sl811_cs_event(0x%06x)\n", event);
+
+ switch (event) {
+ case CS_EVENT_CARD_REMOVAL:
+ link->state &= ~DEV_PRESENT;
+ if (link->state & DEV_CONFIG)
+ sl811_cs_release(link);
+ break;
+
+ case CS_EVENT_CARD_INSERTION:
+ link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+ sl811_cs_config(link);
+ break;
+
+ case CS_EVENT_PM_SUSPEND:
+ link->state |= DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_RESET_PHYSICAL:
+ if (link->state & DEV_CONFIG)
+ pcmcia_release_configuration(link->handle);
+ break;
+
+ case CS_EVENT_PM_RESUME:
+ link->state &= ~DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_CARD_RESET:
+ if (link->state & DEV_CONFIG)
+ pcmcia_request_configuration(link->handle, &link->conf);
+ DBG(0, "reset sl811-hcd here?\n");
+ break;
+ }
+ return 0;
+}
+
+static dev_link_t *sl811_cs_attach(void)
+{
+ local_info_t *local;
+ dev_link_t *link;
+ client_reg_t client_reg;
+ int ret, i;
+
+ local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
+ if (!local)
+ return NULL;
+ memset(local, 0, sizeof(local_info_t));
+ link = &local->link;
+ link->priv = local;
+
+ /* Initialize */
+ link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
+ link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
+ if (irq_list[0] == -1)
+ link->irq.IRQInfo2 = irq_mask;
+ else
+ for (i = 0; i < irq_list_count; i++)
+ link->irq.IRQInfo2 |= 1 << irq_list[i];
+ link->irq.Handler = NULL;
+
+ link->conf.Attributes = 0;
+ link->conf.Vcc = 33;
+ link->conf.IntType = INT_MEMORY_AND_IO;
+
+ /* Register with Card Services */
+ link->next = dev_list;
+ dev_list = link;
+ client_reg.dev_info = (dev_info_t *) &driver_name;
+ client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
+ client_reg.EventMask =
+ CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
+ CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
+ CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
+ client_reg.event_handler = &sl811_cs_event;
+ client_reg.Version = 0x0210;
+ client_reg.event_callback_args.client_data = link;
+ ret = pcmcia_register_client(&link->handle, &client_reg);
+ if (ret != CS_SUCCESS) {
+ cs_error(link->handle, RegisterClient, ret);
+ sl811_cs_detach(link);
+ return NULL;
+ }
+
+ return link;
+}
+
+static struct pcmcia_driver sl811_cs_driver = {
+ .owner = THIS_MODULE,
+ .drv = {
+ .name = (char *)driver_name,
+ },
+ .attach = sl811_cs_attach,
+ .detach = sl811_cs_detach,
+};
+
+/*====================================================================*/
+
+static int __init init_sl811_cs(void)
+{
+ return pcmcia_register_driver(&sl811_cs_driver);
+}
+module_init(init_sl811_cs);
+
+static void __exit exit_sl811_cs(void)
+{
+ pcmcia_unregister_driver(&sl811_cs_driver);
+}
+module_exit(exit_sl811_cs);