[PATCH] mmc: driver for TI FlashMedia card reader - source
Driver for TI Flash Media card reader. At present, only MMC/SD cards are
supported.
[akpm@osdl.org: cleanups, build fixes]
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Cc: Daniel Qarras <dqarras@yahoo.com>
Acked-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
new file mode 100644
index 0000000..a7ed304
--- /dev/null
+++ b/drivers/misc/tifm_7xx1.c
@@ -0,0 +1,437 @@
+/*
+ * tifm_7xx1.c - TI FlashMedia driver
+ *
+ * Copyright (C) 2006 Alex Dubov <oakad@yahoo.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/tifm.h>
+#include <linux/dma-mapping.h>
+
+#define DRIVER_NAME "tifm_7xx1"
+#define DRIVER_VERSION "0.6"
+
+static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
+{
+ int cnt;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fm->lock, flags);
+ if (!fm->inhibit_new_cards) {
+ for (cnt = 0; cnt < fm->max_sockets; cnt++) {
+ if (fm->sockets[cnt] == sock) {
+ fm->remove_mask |= (1 << cnt);
+ queue_work(fm->wq, &fm->media_remover);
+ break;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&fm->lock, flags);
+}
+
+static void tifm_7xx1_remove_media(void *adapter)
+{
+ struct tifm_adapter *fm = adapter;
+ unsigned long flags;
+ int cnt;
+ struct tifm_dev *sock;
+
+ if (!class_device_get(&fm->cdev))
+ return;
+ spin_lock_irqsave(&fm->lock, flags);
+ for (cnt = 0; cnt < fm->max_sockets; cnt++) {
+ if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
+ printk(KERN_INFO DRIVER_NAME
+ ": demand removing card from socket %d\n", cnt);
+ sock = fm->sockets[cnt];
+ fm->sockets[cnt] = 0;
+ fm->remove_mask &= ~(1 << cnt);
+
+ writel(0x0e00, sock->addr + SOCK_CONTROL);
+
+ writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+
+ spin_unlock_irqrestore(&fm->lock, flags);
+ device_unregister(&sock->dev);
+ spin_lock_irqsave(&fm->lock, flags);
+ }
+ }
+ spin_unlock_irqrestore(&fm->lock, flags);
+ class_device_put(&fm->cdev);
+}
+
+static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct tifm_adapter *fm = dev_id;
+ unsigned int irq_status;
+ unsigned int sock_irq_status, cnt;
+
+ spin_lock(&fm->lock);
+ irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
+ if (irq_status == 0 || irq_status == (~0)) {
+ spin_unlock(&fm->lock);
+ return IRQ_NONE;
+ }
+
+ if (irq_status & TIFM_IRQ_ENABLE) {
+ writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+
+ for (cnt = 0; cnt < fm->max_sockets; cnt++) {
+ sock_irq_status = (irq_status >> cnt) &
+ (TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);
+
+ if (fm->sockets[cnt]) {
+ if (sock_irq_status &&
+ fm->sockets[cnt]->signal_irq)
+ sock_irq_status = fm->sockets[cnt]->
+ signal_irq(fm->sockets[cnt],
+ sock_irq_status);
+
+ if (irq_status & (1 << cnt))
+ fm->remove_mask |= 1 << cnt;
+ } else {
+ if (irq_status & (1 << cnt))
+ fm->insert_mask |= 1 << cnt;
+ }
+ }
+ }
+ writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
+
+ if (!fm->inhibit_new_cards) {
+ if (!fm->remove_mask && !fm->insert_mask) {
+ writel(TIFM_IRQ_ENABLE,
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ } else {
+ queue_work(fm->wq, &fm->media_remover);
+ queue_work(fm->wq, &fm->media_inserter);
+ }
+ }
+
+ spin_unlock(&fm->lock);
+ return IRQ_HANDLED;
+}
+
+static tifm_media_id tifm_7xx1_toggle_sock_power(char *sock_addr, int is_x2)
+{
+ unsigned int s_state;
+ int cnt;
+
+ writel(0x0e00, sock_addr + SOCK_CONTROL);
+
+ for (cnt = 0; cnt < 100; cnt++) {
+ if (!(TIFM_SOCK_STATE_POWERED &
+ readl(sock_addr + SOCK_PRESENT_STATE)))
+ break;
+ msleep(10);
+ }
+
+ s_state = readl(sock_addr + SOCK_PRESENT_STATE);
+ if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
+ return FM_NULL;
+
+ if (is_x2) {
+ writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
+ } else {
+ // SmartMedia cards need extra 40 msec
+ if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
+ msleep(40);
+ writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
+ sock_addr + SOCK_CONTROL);
+ msleep(10);
+ writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
+ sock_addr + SOCK_CONTROL);
+ }
+
+ for (cnt = 0; cnt < 100; cnt++) {
+ if ((TIFM_SOCK_STATE_POWERED &
+ readl(sock_addr + SOCK_PRESENT_STATE)))
+ break;
+ msleep(10);
+ }
+
+ if (!is_x2)
+ writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
+ sock_addr + SOCK_CONTROL);
+
+ return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
+}
+
+inline static char *tifm_7xx1_sock_addr(char *base_addr, unsigned int sock_num)
+{
+ return base_addr + ((sock_num + 1) << 10);
+}
+
+static void tifm_7xx1_insert_media(void *adapter)
+{
+ struct tifm_adapter *fm = adapter;
+ unsigned long flags;
+ tifm_media_id media_id;
+ char *card_name = "xx";
+ int cnt, ok_to_register;
+ unsigned int insert_mask;
+ struct tifm_dev *new_sock = 0;
+
+ if (!class_device_get(&fm->cdev))
+ return;
+ spin_lock_irqsave(&fm->lock, flags);
+ insert_mask = fm->insert_mask;
+ fm->insert_mask = 0;
+ if (fm->inhibit_new_cards) {
+ spin_unlock_irqrestore(&fm->lock, flags);
+ class_device_put(&fm->cdev);
+ return;
+ }
+ spin_unlock_irqrestore(&fm->lock, flags);
+
+ for (cnt = 0; cnt < fm->max_sockets; cnt++) {
+ if (!(insert_mask & (1 << cnt)))
+ continue;
+
+ media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
+ fm->max_sockets == 2);
+ if (media_id) {
+ ok_to_register = 0;
+ new_sock = tifm_alloc_device(fm, cnt);
+ if (new_sock) {
+ new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
+ cnt);
+ new_sock->media_id = media_id;
+ switch (media_id) {
+ case 1:
+ card_name = "xd";
+ break;
+ case 2:
+ card_name = "ms";
+ break;
+ case 3:
+ card_name = "sd";
+ break;
+ default:
+ break;
+ }
+ snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
+ "tifm_%s%u:%u", card_name, fm->id, cnt);
+ printk(KERN_INFO DRIVER_NAME
+ ": %s card detected in socket %d\n",
+ card_name, cnt);
+ spin_lock_irqsave(&fm->lock, flags);
+ if (!fm->sockets[cnt]) {
+ fm->sockets[cnt] = new_sock;
+ ok_to_register = 1;
+ }
+ spin_unlock_irqrestore(&fm->lock, flags);
+ if (!ok_to_register ||
+ device_register(&new_sock->dev)) {
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->sockets[cnt] = 0;
+ spin_unlock_irqrestore(&fm->lock,
+ flags);
+ tifm_free_device(&new_sock->dev);
+ }
+ }
+ }
+ writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ }
+
+ writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
+ class_device_put(&fm->cdev);
+}
+
+static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
+{
+ struct tifm_adapter *fm = pci_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->inhibit_new_cards = 1;
+ fm->remove_mask = 0xf;
+ fm->insert_mask = 0;
+ writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ spin_unlock_irqrestore(&fm->lock, flags);
+ flush_workqueue(fm->wq);
+
+ tifm_7xx1_remove_media(fm);
+
+ pci_set_power_state(dev, PCI_D3hot);
+ pci_disable_device(dev);
+ pci_save_state(dev);
+ return 0;
+}
+
+static int tifm_7xx1_resume(struct pci_dev *dev)
+{
+ struct tifm_adapter *fm = pci_get_drvdata(dev);
+ unsigned long flags;
+
+ pci_restore_state(dev);
+ pci_enable_device(dev);
+ pci_set_power_state(dev, PCI_D0);
+ pci_set_master(dev);
+
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->inhibit_new_cards = 0;
+ writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
+ writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ fm->insert_mask = 0xf;
+ spin_unlock_irqrestore(&fm->lock, flags);
+ return 0;
+}
+
+static int tifm_7xx1_probe(struct pci_dev *dev,
+ const struct pci_device_id *dev_id)
+{
+ struct tifm_adapter *fm;
+ int pci_dev_busy = 0;
+ int rc;
+
+ rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
+ if (rc)
+ return rc;
+
+ rc = pci_enable_device(dev);
+ if (rc)
+ return rc;
+
+ pci_set_master(dev);
+
+ rc = pci_request_regions(dev, DRIVER_NAME);
+ if (rc) {
+ pci_dev_busy = 1;
+ goto err_out;
+ }
+
+ pci_intx(dev, 1);
+
+ fm = tifm_alloc_adapter();
+ if (!fm) {
+ rc = -ENOMEM;
+ goto err_out_int;
+ }
+
+ fm->dev = &dev->dev;
+ fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
+ fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
+ GFP_KERNEL);
+ if (!fm->sockets)
+ goto err_out_free;
+
+ INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media, fm);
+ INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media, fm);
+ fm->eject = tifm_7xx1_eject;
+ pci_set_drvdata(dev, fm);
+
+ fm->addr = ioremap(pci_resource_start(dev, 0),
+ pci_resource_len(dev, 0));
+ if (!fm->addr)
+ goto err_out_free;
+
+ rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
+ if (rc)
+ goto err_out_unmap;
+
+ rc = tifm_add_adapter(fm);
+ if (rc)
+ goto err_out_irq;
+
+ writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+
+ fm->insert_mask = 0xf;
+
+ return 0;
+
+err_out_irq:
+ free_irq(dev->irq, fm);
+err_out_unmap:
+ iounmap(fm->addr);
+err_out_free:
+ pci_set_drvdata(dev, NULL);
+ tifm_free_adapter(fm);
+err_out_int:
+ pci_intx(dev, 0);
+ pci_release_regions(dev);
+err_out:
+ if (!pci_dev_busy)
+ pci_disable_device(dev);
+ return rc;
+}
+
+static void tifm_7xx1_remove(struct pci_dev *dev)
+{
+ struct tifm_adapter *fm = pci_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->inhibit_new_cards = 1;
+ fm->remove_mask = 0xf;
+ fm->insert_mask = 0;
+ writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ spin_unlock_irqrestore(&fm->lock, flags);
+
+ flush_workqueue(fm->wq);
+
+ tifm_7xx1_remove_media(fm);
+
+ writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ free_irq(dev->irq, fm);
+
+ tifm_remove_adapter(fm);
+
+ pci_set_drvdata(dev, 0);
+
+ iounmap(fm->addr);
+ pci_intx(dev, 0);
+ pci_release_regions(dev);
+
+ pci_disable_device(dev);
+ tifm_free_adapter(fm);
+}
+
+static struct pci_device_id tifm_7xx1_pci_tbl [] = {
+ { PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ 0 }, /* xx21 - the one I have */
+ { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ 0 }, /* xx12 - should be also supported */
+ { }
+};
+
+static struct pci_driver tifm_7xx1_driver = {
+ .name = DRIVER_NAME,
+ .id_table = tifm_7xx1_pci_tbl,
+ .probe = tifm_7xx1_probe,
+ .remove = tifm_7xx1_remove,
+ .suspend = tifm_7xx1_suspend,
+ .resume = tifm_7xx1_resume,
+};
+
+static int __init tifm_7xx1_init(void)
+{
+ return pci_register_driver(&tifm_7xx1_driver);
+}
+
+static void __exit tifm_7xx1_exit(void)
+{
+ pci_unregister_driver(&tifm_7xx1_driver);
+}
+
+MODULE_AUTHOR("Alex Dubov");
+MODULE_DESCRIPTION("TI FlashMedia host driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
+MODULE_VERSION(DRIVER_VERSION);
+
+module_init(tifm_7xx1_init);
+module_exit(tifm_7xx1_exit);