--- /dev/null
+/*
+ * 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>
+#include <linux/module.h>
+
+#define DRIVER_NAME "tifm_7xx1"
+#define DRIVER_VERSION "0.8"
+
+#define TIFM_IRQ_ENABLE 0x80000000
+#define TIFM_IRQ_SOCKMASK(x) (x)
+#define TIFM_IRQ_CARDMASK(x) ((x) << 8)
+#define TIFM_IRQ_FIFOMASK(x) ((x) << 16)
+#define TIFM_IRQ_SETALL 0xffffffff
+
+static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
+ struct tifm_dev *sock)
+{
+}
+
+static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->socket_change_set |= 1 << sock->socket_id;
+ tifm_queue_work(&fm->media_switcher);
+ spin_unlock_irqrestore(&fm->lock, flags);
+}
+
+static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
+{
+ struct tifm_adapter *fm = dev_id;
+ struct tifm_dev *sock;
+ unsigned int 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->num_sockets; cnt++) {
+ sock = fm->sockets[cnt];
+ if (sock) {
+ if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
+ sock->data_event(sock);
+ if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
+ sock->card_event(sock);
+ }
+ }
+
+ fm->socket_change_set |= irq_status
+ & ((1 << fm->num_sockets) - 1);
+ }
+ writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
+
+ if (fm->finish_me)
+ complete_all(fm->finish_me);
+ else if (!fm->socket_change_set)
+ writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
+ else
+ tifm_queue_work(&fm->media_switcher);
+
+ spin_unlock(&fm->lock);
+ return IRQ_HANDLED;
+}
+
+static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
+{
+ unsigned int s_state;
+ int cnt;
+
+ writel(0x0e00, sock_addr + SOCK_CONTROL);
+
+ for (cnt = 16; cnt <= 256; cnt <<= 1) {
+ if (!(TIFM_SOCK_STATE_POWERED
+ & readl(sock_addr + SOCK_PRESENT_STATE)))
+ break;
+
+ msleep(cnt);
+ }
+
+ s_state = readl(sock_addr + SOCK_PRESENT_STATE);
+ if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
+ return 0;
+
+ writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
+ sock_addr + SOCK_CONTROL);
+
+ /* xd needs some extra time before power on */
+ if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
+ == TIFM_TYPE_XD)
+ msleep(40);
+
+ writel((s_state & TIFM_CTRL_POWER_MASK) | 0x0c00,
+ sock_addr + SOCK_CONTROL);
+ /* wait for power to stabilize */
+ msleep(20);
+ for (cnt = 16; cnt <= 256; cnt <<= 1) {
+ if ((TIFM_SOCK_STATE_POWERED
+ & readl(sock_addr + SOCK_PRESENT_STATE)))
+ break;
+
+ msleep(cnt);
+ }
+
+ writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
+ sock_addr + SOCK_CONTROL);
+
+ return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
+}
+
+inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr)
+{
+ writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL),
+ sock_addr + SOCK_CONTROL);
+}
+
+inline static char __iomem *
+tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
+{
+ return base_addr + ((sock_num + 1) << 10);
+}
+
+static void tifm_7xx1_switch_media(struct work_struct *work)
+{
+ struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
+ media_switcher);
+ struct tifm_dev *sock;
+ char __iomem *sock_addr;
+ unsigned long flags;
+ unsigned char media_id;
+ unsigned int socket_change_set, cnt;
+
+ spin_lock_irqsave(&fm->lock, flags);
+ socket_change_set = fm->socket_change_set;
+ fm->socket_change_set = 0;
+
+ dev_dbg(fm->dev.parent, "checking media set %x\n",
+ socket_change_set);
+
+ if (!socket_change_set) {
+ spin_unlock_irqrestore(&fm->lock, flags);
+ return;
+ }
+
+ for (cnt = 0; cnt < fm->num_sockets; cnt++) {
+ if (!(socket_change_set & (1 << cnt)))
+ continue;
+ sock = fm->sockets[cnt];
+ if (sock) {
+ printk(KERN_INFO
+ "%s : demand removing card from socket %u:%u\n",
+ dev_name(&fm->dev), fm->id, cnt);
+ fm->sockets[cnt] = NULL;
+ sock_addr = sock->addr;
+ spin_unlock_irqrestore(&fm->lock, flags);
+ device_unregister(&sock->dev);
+ spin_lock_irqsave(&fm->lock, flags);
+ tifm_7xx1_sock_power_off(sock_addr);
+ writel(0x0e00, sock_addr + SOCK_CONTROL);
+ }
+
+ spin_unlock_irqrestore(&fm->lock, flags);
+
+ media_id = tifm_7xx1_toggle_sock_power(
+ tifm_7xx1_sock_addr(fm->addr, cnt));
+
+ // tifm_alloc_device will check if media_id is valid
+ sock = tifm_alloc_device(fm, cnt, media_id);
+ if (sock) {
+ sock->addr = tifm_7xx1_sock_addr(fm->addr, cnt);
+
+ if (!device_register(&sock->dev)) {
+ spin_lock_irqsave(&fm->lock, flags);
+ if (!fm->sockets[cnt]) {
+ fm->sockets[cnt] = sock;
+ sock = NULL;
+ }
+ spin_unlock_irqrestore(&fm->lock, flags);
+ }
+ if (sock)
+ tifm_free_device(&sock->dev);
+ }
+ spin_lock_irqsave(&fm->lock, flags);
+ }
+
+ writel(TIFM_IRQ_FIFOMASK(socket_change_set)
+ | TIFM_IRQ_CARDMASK(socket_change_set),
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+
+ writel(TIFM_IRQ_FIFOMASK(socket_change_set)
+ | TIFM_IRQ_CARDMASK(socket_change_set),
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+
+ writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
+ spin_unlock_irqrestore(&fm->lock, flags);
+}
+
+#ifdef CONFIG_PM
+
+static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
+{
+ struct tifm_adapter *fm = pci_get_drvdata(dev);
+ int cnt;
+
+ dev_dbg(&dev->dev, "suspending host\n");
+
+ for (cnt = 0; cnt < fm->num_sockets; cnt++) {
+ if (fm->sockets[cnt])
+ tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr);
+ }
+
+ pci_save_state(dev);
+ pci_enable_wake(dev, pci_choose_state(dev, state), 0);
+ pci_disable_device(dev);
+ pci_set_power_state(dev, pci_choose_state(dev, state));
+ return 0;
+}
+
+static int tifm_7xx1_resume(struct pci_dev *dev)
+{
+ struct tifm_adapter *fm = pci_get_drvdata(dev);
+ int rc;
+ unsigned long timeout;
+ unsigned int good_sockets = 0, bad_sockets = 0;
+ unsigned long flags;
+ unsigned char new_ids[fm->num_sockets];
+ DECLARE_COMPLETION_ONSTACK(finish_resume);
+
+ pci_set_power_state(dev, PCI_D0);
+ pci_restore_state(dev);
+ rc = pci_enable_device(dev);
+ if (rc)
+ return rc;
+ pci_set_master(dev);
+
+ dev_dbg(&dev->dev, "resuming host\n");
+
+ for (rc = 0; rc < fm->num_sockets; rc++)
+ new_ids[rc] = tifm_7xx1_toggle_sock_power(
+ tifm_7xx1_sock_addr(fm->addr, rc));
+ spin_lock_irqsave(&fm->lock, flags);
+ for (rc = 0; rc < fm->num_sockets; rc++) {
+ if (fm->sockets[rc]) {
+ if (fm->sockets[rc]->type == new_ids[rc])
+ good_sockets |= 1 << rc;
+ else
+ bad_sockets |= 1 << rc;
+ }
+ }
+
+ writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
+ good_sockets, bad_sockets);
+
+ fm->socket_change_set = 0;
+ if (good_sockets) {
+ fm->finish_me = &finish_resume;
+ spin_unlock_irqrestore(&fm->lock, flags);
+ timeout = wait_for_completion_timeout(&finish_resume, HZ);
+ dev_dbg(&dev->dev, "wait returned %lu\n", timeout);
+ writel(TIFM_IRQ_FIFOMASK(good_sockets)
+ | TIFM_IRQ_CARDMASK(good_sockets),
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel(TIFM_IRQ_FIFOMASK(good_sockets)
+ | TIFM_IRQ_CARDMASK(good_sockets),
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->finish_me = NULL;
+ fm->socket_change_set ^= good_sockets & fm->socket_change_set;
+ }
+
+ fm->socket_change_set |= bad_sockets;
+ if (fm->socket_change_set)
+ tifm_queue_work(&fm->media_switcher);
+
+ spin_unlock_irqrestore(&fm->lock, flags);
+ writel(TIFM_IRQ_ENABLE,
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+
+ return 0;
+}
+
+#else
+
+#define tifm_7xx1_suspend NULL
+#define tifm_7xx1_resume NULL
+
+#endif /* CONFIG_PM */
+
+static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm,
+ struct tifm_dev *sock)
+{
+ return 0;
+}
+
+static int tifm_7xx1_has_ms_pif(struct tifm_adapter *fm, struct tifm_dev *sock)
+{
+ if (((fm->num_sockets == 4) && (sock->socket_id == 2))
+ || ((fm->num_sockets == 2) && (sock->socket_id == 0)))
+ return 1;
+
+ 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_BIT_MASK(32));
+ 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(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
+ ? 4 : 2, &dev->dev);
+ if (!fm) {
+ rc = -ENOMEM;
+ goto err_out_int;
+ }
+
+ INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
+ fm->eject = tifm_7xx1_eject;
+ fm->has_ms_pif = tifm_7xx1_has_ms_pif;
+ pci_set_drvdata(dev, fm);
+
+ fm->addr = pci_ioremap_bar(dev, 0);
+ if (!fm->addr) {
+ rc = -ENODEV;
+ goto err_out_free;
+ }
+
+ rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
+ if (rc)
+ goto err_out_unmap;
+
+ rc = tifm_add_adapter(fm);
+ if (rc)
+ goto err_out_irq;
+
+ writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ return 0;
+
+err_out_irq:
+ free_irq(dev->irq, fm);
+err_out_unmap:
+ iounmap(fm->addr);
+err_out_free:
+ 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);
+ int cnt;
+
+ fm->eject = tifm_7xx1_dummy_eject;
+ fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif;
+ writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ mmiowb();
+ free_irq(dev->irq, fm);
+
+ tifm_remove_adapter(fm);
+
+ for (cnt = 0; cnt < fm->num_sockets; cnt++)
+ tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));
+
+ 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, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
+ { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { }
+};
+
+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,
+};
+
+module_pci_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);
Code Review / kvmfornfv.git / blobdiff