diff options
| -rw-r--r-- | MAINTAINERS | 5 | ||||
| -rw-r--r-- | drivers/misc/tifm_7xx1.c | 437 | ||||
| -rw-r--r-- | drivers/misc/tifm_core.c | 272 | ||||
| -rw-r--r-- | drivers/mmc/tifm_sd.c | 933 | ||||
| -rw-r--r-- | include/linux/tifm.h | 158 |
5 files changed, 1805 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 1c6223d..77e5858 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2854,6 +2854,11 @@ M: hlhung3i@gmail.com W: http://tcp-lp-mod.sourceforge.net/ S: Maintained +TI FLASH MEDIA INTERFACE DRIVER +P: Alex Dubov +M: oakad@yahoo.com +S: Maintained + TI OMAP RANDOM NUMBER GENERATOR SUPPORT P: Deepak Saxena M: dsaxena@plexity.net 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); diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c new file mode 100644 index 0000000..cca5f85 --- /dev/null +++ b/drivers/misc/tifm_core.c @@ -0,0 +1,272 @@ +/* + * tifm_core.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/init.h> +#include <linux/idr.h> + +#define DRIVER_NAME "tifm_core" +#define DRIVER_VERSION "0.6" + +static DEFINE_IDR(tifm_adapter_idr); +static DEFINE_SPINLOCK(tifm_adapter_lock); + +static tifm_media_id *tifm_device_match(tifm_media_id *ids, + struct tifm_dev *dev) +{ + while (*ids) { + if (dev->media_id == *ids) + return ids; + ids++; + } + return NULL; +} + +static int tifm_match(struct device *dev, struct device_driver *drv) +{ + struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev); + struct tifm_driver *fm_drv; + + fm_drv = container_of(drv, struct tifm_driver, driver); + if (!fm_drv->id_table) + return -EINVAL; + if (tifm_device_match(fm_drv->id_table, fm_dev)) + return 1; + return -ENODEV; +} + +static int tifm_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct tifm_dev *fm_dev; + int i = 0; + int length = 0; + const char *card_type_name[] = {"INV", "SM", "MS", "SD"}; + + if (!dev || !(fm_dev = container_of(dev, struct tifm_dev, dev))) + return -ENODEV; + if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, + "TIFM_CARD_TYPE=%s", card_type_name[fm_dev->media_id])) + return -ENOMEM; + + return 0; +} + +static struct bus_type tifm_bus_type = { + .name = "tifm", + .match = tifm_match, + .uevent = tifm_uevent, +}; + +static void tifm_free(struct class_device *cdev) +{ + struct tifm_adapter *fm = container_of(cdev, struct tifm_adapter, cdev); + + kfree(fm->sockets); + if (fm->wq) + destroy_workqueue(fm->wq); + kfree(fm); +} + +static struct class tifm_adapter_class = { + .name = "tifm_adapter", + .release = tifm_free +}; + +struct tifm_adapter *tifm_alloc_adapter(void) +{ + struct tifm_adapter *fm; + + fm = kzalloc(sizeof(struct tifm_adapter), GFP_KERNEL); + if (fm) { + fm->cdev.class = &tifm_adapter_class; + spin_lock_init(&fm->lock); + class_device_initialize(&fm->cdev); + } + return fm; +} +EXPORT_SYMBOL(tifm_alloc_adapter); + +void tifm_free_adapter(struct tifm_adapter *fm) +{ + class_device_put(&fm->cdev); +} +EXPORT_SYMBOL(tifm_free_adapter); + +int tifm_add_adapter(struct tifm_adapter *fm) +{ + int rc; + + if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL)) + return -ENOMEM; + + spin_lock(&tifm_adapter_lock); + rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id); + spin_unlock(&tifm_adapter_lock); + if (!rc) { + snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id); + strncpy(fm->wq_name, fm->cdev.class_id, KOBJ_NAME_LEN); + + fm->wq = create_singlethread_workqueue(fm->wq_name); + if (fm->wq) + return class_device_add(&fm->cdev); + + spin_lock(&tifm_adapter_lock); + idr_remove(&tifm_adapter_idr, fm->id); + spin_unlock(&tifm_adapter_lock); + rc = -ENOMEM; + } + return rc; +} +EXPORT_SYMBOL(tifm_add_adapter); + +void tifm_remove_adapter(struct tifm_adapter *fm) +{ + class_device_del(&fm->cdev); + + spin_lock(&tifm_adapter_lock); + idr_remove(&tifm_adapter_idr, fm->id); + spin_unlock(&tifm_adapter_lock); +} +EXPORT_SYMBOL(tifm_remove_adapter); + +void tifm_free_device(struct device *dev) +{ + struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev); + if (fm_dev->wq) + destroy_workqueue(fm_dev->wq); + kfree(fm_dev); +} +EXPORT_SYMBOL(tifm_free_device); + +struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id) +{ + struct tifm_dev *dev = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL); + + if (dev) { + spin_lock_init(&dev->lock); + snprintf(dev->wq_name, KOBJ_NAME_LEN, "tifm%u:%u", fm->id, id); + dev->wq = create_singlethread_workqueue(dev->wq_name); + if (!dev->wq) { + kfree(dev); + return 0; + } + dev->dev.parent = fm->dev; + dev->dev.bus = &tifm_bus_type; + dev->dev.release = tifm_free_device; + } + return dev; +} +EXPORT_SYMBOL(tifm_alloc_device); + +void tifm_eject(struct tifm_dev *sock) +{ + struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent); + fm->eject(fm, sock); +} +EXPORT_SYMBOL(tifm_eject); + +int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, + int direction) +{ + return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction); +} +EXPORT_SYMBOL(tifm_map_sg); + +void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, + int direction) +{ + pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction); +} +EXPORT_SYMBOL(tifm_unmap_sg); + +static int tifm_device_probe(struct device *dev) +{ + struct tifm_driver *drv; + struct tifm_dev *fm_dev; + int rc = 0; + const tifm_media_id *id; + + drv = container_of(dev->driver, struct tifm_driver, driver); + fm_dev = container_of(dev, struct tifm_dev, dev); + get_device(dev); + if (!fm_dev->drv && drv->probe && drv->id_table) { + rc = -ENODEV; + id = tifm_device_match(drv->id_table, fm_dev); + if (id) + rc = drv->probe(fm_dev); + if (rc >= 0) { + rc = 0; + fm_dev->drv = drv; + } + } + if (rc) + put_device(dev); + return rc; +} + +static int tifm_device_remove(struct device *dev) +{ + struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev); + struct tifm_driver *drv = fm_dev->drv; + + if (drv) { + if (drv->remove) drv->remove(fm_dev); + fm_dev->drv = 0; + } + + put_device(dev); + return 0; +} + +int tifm_register_driver(struct tifm_driver *drv) +{ + drv->driver.bus = &tifm_bus_type; + drv->driver.probe = tifm_device_probe; + drv->driver.remove = tifm_device_remove; + + return driver_register(&drv->driver); +} +EXPORT_SYMBOL(tifm_register_driver); + +void tifm_unregister_driver(struct tifm_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL(tifm_unregister_driver); + +static int __init tifm_init(void) +{ + int rc = bus_register(&tifm_bus_type); + + if (!rc) { + rc = class_register(&tifm_adapter_class); + if (rc) + bus_unregister(&tifm_bus_type); + } + + return rc; +} + +static void __exit tifm_exit(void) +{ + class_unregister(&tifm_adapter_class); + bus_unregister(&tifm_bus_type); +} + +subsys_initcall(tifm_init); +module_exit(tifm_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Alex Dubov"); +MODULE_DESCRIPTION("TI FlashMedia core driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRIVER_VERSION); diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c new file mode 100644 index 0000000..6d23dc0 --- /dev/null +++ b/drivers/mmc/tifm_sd.c @@ -0,0 +1,933 @@ +/* + * tifm_sd.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/mmc/protocol.h> +#include <linux/mmc/host.h> +#include <linux/highmem.h> + +#define DRIVER_NAME "tifm_sd" +#define DRIVER_VERSION "0.6" + +static int no_dma = 0; +static int fixed_timeout = 0; +module_param(no_dma, bool, 0644); +module_param(fixed_timeout, bool, 0644); + +/* Constants here are mostly from OMAP5912 datasheet */ +#define TIFM_MMCSD_RESET 0x0002 +#define TIFM_MMCSD_CLKMASK 0x03ff +#define TIFM_MMCSD_POWER 0x0800 +#define TIFM_MMCSD_4BBUS 0x8000 +#define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */ +#define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */ +#define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */ +#define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */ +#define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */ +#define TIFM_MMCSD_READ 0x8000 + +#define TIFM_MMCSD_DATAMASK 0x001d /* set bits: EOFB, BRS, CB, EOC */ +#define TIFM_MMCSD_ERRMASK 0x41e0 /* set bits: CERR, CCRC, CTO, DCRC, DTO */ +#define TIFM_MMCSD_EOC 0x0001 /* end of command phase */ +#define TIFM_MMCSD_CB 0x0004 /* card enter busy state */ +#define TIFM_MMCSD_BRS 0x0008 /* block received/sent */ +#define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */ +#define TIFM_MMCSD_DTO 0x0020 /* data time-out */ +#define TIFM_MMCSD_DCRC 0x0040 /* data crc error */ +#define TIFM_MMCSD_CTO 0x0080 /* command time-out */ +#define TIFM_MMCSD_CCRC 0x0100 /* command crc error */ +#define TIFM_MMCSD_AF 0x0400 /* fifo almost full */ +#define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */ +#define TIFM_MMCSD_CERR 0x4000 /* card status error */ + +#define TIFM_MMCSD_FIFO_SIZE 0x0020 + +#define TIFM_MMCSD_RSP_R0 0x0000 +#define TIFM_MMCSD_RSP_R1 0x0100 +#define TIFM_MMCSD_RSP_R2 0x0200 +#define TIFM_MMCSD_RSP_R3 0x0300 +#define TIFM_MMCSD_RSP_R4 0x0400 +#define TIFM_MMCSD_RSP_R5 0x0500 +#define TIFM_MMCSD_RSP_R6 0x0600 + +#define TIFM_MMCSD_RSP_BUSY 0x0800 + +#define TIFM_MMCSD_CMD_BC 0x0000 +#define TIFM_MMCSD_CMD_BCR 0x1000 +#define TIFM_MMCSD_CMD_AC 0x2000 +#define TIFM_MMCSD_CMD_ADTC 0x3000 + +typedef enum { + IDLE = 0, + CMD, /* main command ended */ + BRS, /* block transfer finished */ + SCMD, /* stop command ended */ + CARD, /* card left busy state */ + FIFO, /* FIFO operation completed (uncertain) */ + READY +} card_state_t; + +enum { + FIFO_RDY = 0x0001, /* hardware dependent value */ + HOST_REG = 0x0002, + EJECT = 0x0004, + EJECT_DONE = 0x0008, + CARD_BUSY = 0x0010, + OPENDRAIN = 0x0040, /* hardware dependent value */ + CARD_EVENT = 0x0100, /* hardware dependent value */ + CARD_RO = 0x0200, /* hardware dependent value */ + FIFO_EVENT = 0x10000 }; /* hardware dependent value */ + +struct tifm_sd { + struct tifm_dev *dev; + + unsigned int flags; + card_state_t state; + unsigned int clk_freq; + unsigned int clk_div; + unsigned long timeout_jiffies; // software timeout - 2 sec + + struct mmc_request *req; + struct work_struct cmd_handler; + struct work_struct abort_handler; + wait_queue_head_t can_eject; + + size_t written_blocks; + char *buffer; + size_t buffer_size; + size_t buffer_pos; + +}; + +static int tifm_sd_transfer_data(struct tifm_dev *sock, struct tifm_sd *host, + unsigned int host_status) +{ + struct mmc_command *cmd = host->req->cmd; + unsigned int t_val = 0, cnt = 0; + + if (host_status & TIFM_MMCSD_BRS) { + /* in non-dma rx mode BRS fires when fifo is still not empty */ + if (host->buffer && (cmd->data->flags & MMC_DATA_READ)) { + while (host->buffer_size > host->buffer_pos) { + t_val = readl(sock->addr + SOCK_MMCSD_DATA); + host->buffer[host->buffer_pos++] = t_val & 0xff; + host->buffer[host->buffer_pos++] = + (t_val >> 8) & 0xff; + } + } + return 1; + } else if (host->buffer) { + if ((cmd->data->flags & MMC_DATA_READ) && + (host_status & TIFM_MMCSD_AF)) { + for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { + t_val = readl(sock->addr + SOCK_MMCSD_DATA); + if (host->buffer_size > host->buffer_pos) { + host->buffer[host->buffer_pos++] = + t_val & 0xff; + host->buffer[host->buffer_pos++] = + (t_val >> 8) & 0xff; + } + } + } else if ((cmd->data->flags & MMC_DATA_WRITE) + && (host_status & TIFM_MMCSD_AE)) { + for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { + if (host->buffer_size > host->buffer_pos) { + t_val = host->buffer[host->buffer_pos++] & 0x00ff; + t_val |= ((host->buffer[host->buffer_pos++]) << 8) + & 0xff00; + writel(t_val, + sock->addr + SOCK_MMCSD_DATA); + } + } + } + } + return 0; +} + +static unsigned int tifm_sd_op_flags(struct mmc_command *cmd) +{ + unsigned int rc = 0; + + switch (mmc_resp_type(cmd)) { + case MMC_RSP_NONE: + rc |= TIFM_MMCSD_RSP_R0; + break; + case MMC_RSP_R1B: + rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through + case MMC_RSP_R1: + rc |= TIFM_MMCSD_RSP_R1; + break; + case MMC_RSP_R2: + rc |= TIFM_MMCSD_RSP_R2; + break; + case MMC_RSP_R3: + rc |= TIFM_MMCSD_RSP_R3; + break; + case MMC_RSP_R6: + rc |= TIFM_MMCSD_RSP_R6; + break; + default: + BUG(); + } + + switch (mmc_cmd_type(cmd)) { + case MMC_CMD_BC: + rc |= TIFM_MMCSD_CMD_BC; + break; + case MMC_CMD_BCR: + rc |= TIFM_MMCSD_CMD_BCR; + break; + case MMC_CMD_AC: + rc |= TIFM_MMCSD_CMD_AC; + break; + case MMC_CMD_ADTC: + rc |= TIFM_MMCSD_CMD_ADTC; + break; + default: + BUG(); + } + return rc; +} + +static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd) +{ + struct tifm_dev *sock = host->dev; + unsigned int cmd_mask = tifm_sd_op_flags(cmd) | + (host->flags & OPENDRAIN); + + if (cmd->data && (cmd->data->flags & MMC_DATA_READ)) + cmd_mask |= TIFM_MMCSD_READ; + + dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n", + cmd->opcode, cmd->arg, cmd_mask); + + writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH); + writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW); + writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND); +} + +static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock) +{ + cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18); + cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10); + cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08); + cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00); +} + +static void tifm_sd_process_cmd(struct tifm_dev *sock, struct tifm_sd *host, + unsigned int host_status) +{ + struct mmc_command *cmd = host->req->cmd; + +change_state: + switch (host->state) { + case IDLE: + return; + case CMD: + if (host_status & TIFM_MMCSD_EOC) { + tifm_sd_fetch_resp(cmd, sock); + if (cmd->data) { + host->state = BRS; + } else + host->state = READY; + goto change_state; + } + break; + case BRS: + if (tifm_sd_transfer_data(sock, host, host_status)) { + if (!host->req->stop) { + if (cmd->data->flags & MMC_DATA_WRITE) { + host->state = CARD; + } else { + host->state = + host->buffer ? READY : FIFO; + } + goto change_state; + } + tifm_sd_exec(host, host->req->stop); + host->state = SCMD; + } + break; + case SCMD: + if (host_status & TIFM_MMCSD_EOC) { + tifm_sd_fetch_resp(host->req->stop, sock); + if (cmd->error) { + host->state = READY; + } else if (cmd->data->flags & MMC_DATA_WRITE) { + host->state = CARD; + } else { + host->state = host->buffer ? READY : FIFO; + } + goto change_state; + } + break; + case CARD: + if (!(host->flags & CARD_BUSY) + && (host->written_blocks == cmd->data->blocks)) { + host->state = host->buffer ? READY : FIFO; + goto change_state; + } + break; + case FIFO: + if (host->flags & FIFO_RDY) { + host->state = READY; + host->flags &= ~FIFO_RDY; + goto change_state; + } + break; + case READY: + queue_work(sock->wq, &host->cmd_handler); + return; + } + + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); +} + +/* Called from interrupt handler */ +static unsigned int tifm_sd_signal_irq(struct tifm_dev *sock, + unsigned int sock_irq_status) +{ + struct tifm_sd *host; + unsigned int host_status = 0, fifo_status = 0; + int error_code = 0; + + spin_lock(&sock->lock); + host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); + cancel_delayed_work(&host->abort_handler); + + if (sock_irq_status & FIFO_EVENT) { + fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS); + writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS); + + host->flags |= fifo_status & FIFO_RDY; + } + + if (sock_irq_status & CARD_EVENT) { + host_status = readl(sock->addr + SOCK_MMCSD_STATUS); + writel(host_status, sock->addr + SOCK_MMCSD_STATUS); + + if (!(host->flags & HOST_REG)) + queue_work(sock->wq, &host->cmd_handler); + if (!host->req) + goto done; + + if (host_status & TIFM_MMCSD_ERRMASK) { + if (host_status & TIFM_MMCSD_CERR) + error_code = MMC_ERR_FAILED; + else if (host_status & + (TIFM_MMCSD_CTO | TIFM_MMCSD_DTO)) + error_code = MMC_ERR_TIMEOUT; + else if (host_status & + (TIFM_MMCSD_CCRC | TIFM_MMCSD_DCRC)) + error_code = MMC_ERR_BADCRC; + + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL); + + if (host->req->stop) { + if (host->state == SCMD) { + host->req->stop->error = error_code; + } else if(host->state == BRS) { + host->req->cmd->error = error_code; + tifm_sd_exec(host, host->req->stop); + queue_delayed_work(sock->wq, + &host->abort_handler, + host->timeout_jiffies); + host->state = SCMD; + goto done; + } else { + host->req->cmd->error = error_code; + } + } else { + host->req->cmd->error = error_code; + } + host->state = READY; + } + + if (host_status & TIFM_MMCSD_CB) + host->flags |= CARD_BUSY; + if ((host_status & TIFM_MMCSD_EOFB) && + (host->flags & CARD_BUSY)) { + host->written_blocks++; + host->flags &= ~CARD_BUSY; + } + } + + if (host->req) + tifm_sd_process_cmd(sock, host, host_status); +done: + dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n", + host_status, fifo_status); + spin_unlock(&sock->lock); + return sock_irq_status; +} + +static void tifm_sd_prepare_data(struct tifm_sd *card, struct mmc_command *cmd) +{ + struct tifm_dev *sock = card->dev; + unsigned int dest_cnt; + + /* DMA style IO */ + + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(long_log2(cmd->data->blksz) - 2, + sock->addr + SOCK_FIFO_PAGE_SIZE); + writel(TIFM_FIFO_ENABLE, sock->addr + SOCK_FIFO_CONTROL); + writel(TIFM_FIFO_INTMASK, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); + + dest_cnt = (cmd->data->blocks) << 8; + + writel(sg_dma_address(cmd->data->sg), sock->addr + SOCK_DMA_ADDRESS); + + writel(cmd->data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(cmd->data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); + + if (cmd->data->flags & MMC_DATA_WRITE) { + writel(TIFM_MMCSD_TXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + writel(dest_cnt | TIFM_DMA_TX | TIFM_DMA_EN, + sock->addr + SOCK_DMA_CONTROL); + } else { + writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + writel(dest_cnt | TIFM_DMA_EN, sock->addr + SOCK_DMA_CONTROL); + } +} + +static void tifm_sd_set_data_timeout(struct tifm_sd *host, + struct mmc_data *data) +{ + struct tifm_dev *sock = host->dev; + unsigned int data_timeout = data->timeout_clks; + + if (fixed_timeout) + return; + + data_timeout += data->timeout_ns / + ((1000000000 / host->clk_freq) * host->clk_div); + data_timeout *= 10; // call it fudge factor for now + + if (data_timeout < 0xffff) { + writel((~TIFM_MMCSD_DPE) & + readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), + sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); + writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); + } else { + writel(TIFM_MMCSD_DPE | + readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), + sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); + data_timeout = (data_timeout >> 10) + 1; + if(data_timeout > 0xffff) + data_timeout = 0; /* set to unlimited */ + writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); + } +} + +static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + int sg_count = 0; + struct mmc_data *r_data = mrq->cmd->data; + + spin_lock_irqsave(&sock->lock, flags); + if (host->flags & EJECT) { + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (host->req) { + printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (r_data) { + tifm_sd_set_data_timeout(host, r_data); + + sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len, + mrq->cmd->flags & MMC_DATA_WRITE + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + if (sg_count != 1) { + printk(KERN_ERR DRIVER_NAME + ": scatterlist map failed\n"); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + host->written_blocks = 0; + host->flags &= ~CARD_BUSY; + tifm_sd_prepare_data(host, mrq->cmd); + } + + host->req = mrq; + host->state = CMD; + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); + writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + tifm_sd_exec(host, mrq->cmd); + spin_unlock_irqrestore(&sock->lock, flags); + return; + +err_out: + if (sg_count > 0) + tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, + (r_data->flags & MMC_DATA_WRITE) + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + + mrq->cmd->error = MMC_ERR_TIMEOUT; + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_end_cmd(void *data) +{ + struct tifm_sd *host = data; + struct tifm_dev *sock = host->dev; + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct mmc_request *mrq; + struct mmc_data *r_data = 0; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + mrq = host->req; + host->req = 0; + host->state = IDLE; + + if (!mrq) { + printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); + spin_unlock_irqrestore(&sock->lock, flags); + return; + } + + r_data = mrq->cmd->data; + if (r_data) { + if (r_data->flags & MMC_DATA_WRITE) { + r_data->bytes_xfered = host->written_blocks * + r_data->blksz; + } else { + r_data->bytes_xfered = r_data->blocks - + readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; + r_data->bytes_xfered *= r_data->blksz; + r_data->bytes_xfered += r_data->blksz - + readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; + } + tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, + (r_data->flags & MMC_DATA_WRITE) + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + } + + writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + + spin_unlock_irqrestore(&sock->lock, flags); + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_request_nodma(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + struct mmc_data *r_data = mrq->cmd->data; + char *t_buffer = 0; + + if (r_data) { + t_buffer = kmap(r_data->sg->page); + if (!t_buffer) { + printk(KERN_ERR DRIVER_NAME ": kmap failed\n"); + goto err_out; + } + } + + spin_lock_irqsave(&sock->lock, flags); + if (host->flags & EJECT) { + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (host->req) { + printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (r_data) { + tifm_sd_set_data_timeout(host, r_data); + + host->buffer = t_buffer + r_data->sg->offset; + host->buffer_size = mrq->cmd->data->blocks * + mrq->cmd->data->blksz; + + writel(TIFM_MMCSD_BUFINT | + readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) | + (TIFM_MMCSD_FIFO_SIZE - 1), + sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + + host->written_blocks = 0; + host->flags &= ~CARD_BUSY; + host->buffer_pos = 0; + writel(r_data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(r_data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); + } + + host->req = mrq; + host->state = CMD; + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); + writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + tifm_sd_exec(host, mrq->cmd); + spin_unlock_irqrestore(&sock->lock, flags); + return; + +err_out: + if (t_buffer) + kunmap(r_data->sg->page); + + mrq->cmd->error = MMC_ERR_TIMEOUT; + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_end_cmd_nodma(void *data) +{ + struct tifm_sd *host = (struct tifm_sd*)data; + struct tifm_dev *sock = host->dev; + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct mmc_request *mrq; + struct mmc_data *r_data = 0; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + mrq = host->req; + host->req = 0; + host->state = IDLE; + + if (!mrq) { + printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); + spin_unlock_irqrestore(&sock->lock, flags); + return; + } + + r_data = mrq->cmd->data; + if (r_data) { + writel((~TIFM_MMCSD_BUFINT) & + readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + + if (r_data->flags & MMC_DATA_WRITE) { + r_data->bytes_xfered = host->written_blocks * + r_data->blksz; + } else { + r_data->bytes_xfered = r_data->blocks - + readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; + r_data->bytes_xfered *= r_data->blksz; + r_data->bytes_xfered += r_data->blksz - + readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; + } + host->buffer = 0; + host->buffer_pos = 0; + host->buffer_size = 0; + } + + writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + + spin_unlock_irqrestore(&sock->lock, flags); + + if (r_data) + kunmap(r_data->sg->page); + + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_abort(void *data) +{ + printk(KERN_ERR DRIVER_NAME + ": card failed to respond for a long period of time"); + tifm_eject(((struct tifm_sd*)data)->dev); +} + +static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned int clk_div1, clk_div2; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + dev_dbg(&sock->dev, "Setting bus width %d, power %d\n", ios->bus_width, + ios->power_mode); + if (ios->bus_width == MMC_BUS_WIDTH_4) { + writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG), + sock->addr + SOCK_MMCSD_CONFIG); + } else { + writel((~TIFM_MMCSD_4BBUS) & + readl(sock->addr + SOCK_MMCSD_CONFIG), + sock->addr + SOCK_MMCSD_CONFIG); + } + + if (ios->clock) { + clk_div1 = 20000000 / ios->clock; + if (!clk_div1) + clk_div1 = 1; + + clk_div2 = 24000000 / ios->clock; + if (!clk_div2) + clk_div2 = 1; + + if ((20000000 / clk_div1) > ios->clock) + clk_div1++; + if ((24000000 / clk_div2) > ios->clock) + clk_div2++; + if ((20000000 / clk_div1) > (24000000 / clk_div2)) { + host->clk_freq = 20000000; + host->clk_div = clk_div1; + writel((~TIFM_CTRL_FAST_CLK) & + readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + } else { + host->clk_freq = 24000000; + host->clk_div = clk_div2; + writel(TIFM_CTRL_FAST_CLK | + readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + } + } else { + host->clk_div = 0; + } + host->clk_div &= TIFM_MMCSD_CLKMASK; + writel(host->clk_div | ((~TIFM_MMCSD_CLKMASK) & + readl(sock->addr + SOCK_MMCSD_CONFIG)), + sock->addr + SOCK_MMCSD_CONFIG); + + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) + host->flags |= OPENDRAIN; + else + host->flags &= ~OPENDRAIN; + + /* chip_select : maybe later */ + //vdd + //power is set before probe / after remove + //I believe, power_off when already marked for eject is sufficient to + // allow removal. + if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) { + host->flags |= EJECT_DONE; + wake_up_all(&host->can_eject); + } + + spin_unlock_irqrestore(&sock->lock, flags); +} + +static int tifm_sd_ro(struct mmc_host *mmc) +{ + int rc; + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + host->flags |= (CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE)); + rc = (host->flags & CARD_RO) ? 1 : 0; + + spin_unlock_irqrestore(&sock->lock, flags); + return rc; +} + +static struct mmc_host_ops tifm_sd_ops = { + .request = tifm_sd_request, + .set_ios = tifm_sd_ios, + .get_ro = tifm_sd_ro +}; + +static void tifm_sd_register_host(void *data) +{ + struct tifm_sd *host = (struct tifm_sd*)data; + struct tifm_dev *sock = host->dev; + struct mmc_host *mmc = tifm_get_drvdata(sock); + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + host->flags |= HOST_REG; + PREPARE_WORK(&host->cmd_handler, + no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd, + data); + spin_unlock_irqrestore(&sock->lock, flags); + dev_dbg(&sock->dev, "adding host\n"); + mmc_add_host(mmc); +} + +static int tifm_sd_probe(struct tifm_dev *sock) +{ + struct mmc_host *mmc; + struct tifm_sd *host; + int rc = -EIO; + + if (!(TIFM_SOCK_STATE_OCCUPIED & + readl(sock->addr + SOCK_PRESENT_STATE))) { + printk(KERN_WARNING DRIVER_NAME ": card gone, unexpectedly\n"); + return rc; + } + + mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev); + if (!mmc) + return -ENOMEM; + + host = mmc_priv(mmc); + host->dev = sock; + host->clk_div = 61; + init_waitqueue_head(&host->can_eject); + INIT_WORK(&host->cmd_handler, tifm_sd_register_host, host); + INIT_WORK(&host->abort_handler, tifm_sd_abort, host); + + tifm_set_drvdata(sock, mmc); + sock->signal_irq = tifm_sd_signal_irq; + + host->clk_freq = 20000000; + host->timeout_jiffies = msecs_to_jiffies(1000); + + tifm_sd_ops.request = no_dma ? tifm_sd_request_nodma : tifm_sd_request; + mmc->ops = &tifm_sd_ops; + mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; + mmc->caps = MMC_CAP_4_BIT_DATA; + mmc->f_min = 20000000 / 60; + mmc->f_max = 24000000; + mmc->max_hw_segs = 1; + mmc->max_phys_segs = 1; + mmc->max_sectors = 127; + mmc->max_seg_size = mmc->max_sectors << 11; //2k maximum hw block length + + writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + + for (rc = 0; rc < 50; rc++) { + /* Wait for reset ack */ + if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { + rc = 0; + break; + } + msleep(10); + } + + if (rc) { + printk(KERN_ERR DRIVER_NAME + ": card not ready - probe failed\n"); + mmc_free_host(mmc); + return -ENODEV; + } + + writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + writel(TIFM_MMCSD_DATAMASK | TIFM_MMCSD_ERRMASK, + sock->addr + SOCK_MMCSD_INT_ENABLE); + + writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); // command timeout 64 clocks for now + writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); + + return 0; +} + +static int tifm_sd_host_is_down(struct tifm_dev *sock) +{ + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct tifm_sd *host = mmc_priv(mmc); + unsigned long flags; + int rc = 0; + + spin_lock_irqsave(&sock->lock, flags); + rc = (host->flags & EJECT_DONE); + spin_unlock_irqrestore(&sock->lock, flags); + return rc; +} + +static void tifm_sd_remove(struct tifm_dev *sock) +{ + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct tifm_sd *host = mmc_priv(mmc); + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + host->flags |= EJECT; + if (host->req) + queue_work(sock->wq, &host->cmd_handler); + spin_unlock_irqrestore(&sock->lock, flags); + wait_event_timeout(host->can_eject, tifm_sd_host_is_down(sock), + host->timeout_jiffies); + + if (host->flags & HOST_REG) + mmc_remove_host(mmc); + + /* The meaning of the bit majority in this constant is unknown. */ + writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); + + tifm_set_drvdata(sock, 0); + mmc_free_host(mmc); +} + +static tifm_media_id tifm_sd_id_tbl[] = { + FM_SD, 0 +}; + +static struct tifm_driver tifm_sd_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE + }, + .id_table = tifm_sd_id_tbl, + .probe = tifm_sd_probe, + .remove = tifm_sd_remove +}; + +static int __init tifm_sd_init(void) +{ + return tifm_register_driver(&tifm_sd_driver); +} + +static void __exit tifm_sd_exit(void) +{ + tifm_unregister_driver(&tifm_sd_driver); +} + +MODULE_AUTHOR("Alex Dubov"); +MODULE_DESCRIPTION("TI FlashMedia SD driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl); +MODULE_VERSION(DRIVER_VERSION); + +module_init(tifm_sd_init); +module_exit(tifm_sd_exit); diff --git a/include/linux/tifm.h b/include/linux/tifm.h new file mode 100644 index 0000000..203dd5e --- /dev/null +++ b/include/linux/tifm.h @@ -0,0 +1,158 @@ +/* + * tifm.h - 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. + * + */ + +#ifndef _TIFM_H +#define _TIFM_H + +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/wait.h> +#include <linux/delay.h> +#include <linux/pci.h> + +/* Host registers (relative to pci base address): */ +enum { + FM_SET_INTERRUPT_ENABLE = 0x008, + FM_CLEAR_INTERRUPT_ENABLE = 0x00c, + FM_INTERRUPT_STATUS = 0x014 }; + +/* Socket registers (relative to socket base address): */ +enum { + SOCK_CONTROL = 0x004, + SOCK_PRESENT_STATE = 0x008, + SOCK_DMA_ADDRESS = 0x00c, + SOCK_DMA_CONTROL = 0x010, + SOCK_DMA_FIFO_INT_ENABLE_SET = 0x014, + SOCK_DMA_FIFO_INT_ENABLE_CLEAR = 0x018, + SOCK_DMA_FIFO_STATUS = 0x020, + SOCK_FIFO_CONTROL = 0x024, + SOCK_FIFO_PAGE_SIZE = 0x028, + SOCK_MMCSD_COMMAND = 0x104, + SOCK_MMCSD_ARG_LOW = 0x108, + SOCK_MMCSD_ARG_HIGH = 0x10c, + SOCK_MMCSD_CONFIG = 0x110, + SOCK_MMCSD_STATUS = 0x114, + SOCK_MMCSD_INT_ENABLE = 0x118, + SOCK_MMCSD_COMMAND_TO = 0x11c, + SOCK_MMCSD_DATA_TO = 0x120, + SOCK_MMCSD_DATA = 0x124, + SOCK_MMCSD_BLOCK_LEN = 0x128, + SOCK_MMCSD_NUM_BLOCKS = 0x12c, + SOCK_MMCSD_BUFFER_CONFIG = 0x130, + SOCK_MMCSD_SPI_CONFIG = 0x134, + SOCK_MMCSD_SDIO_MODE_CONFIG = 0x138, + SOCK_MMCSD_RESPONSE = 0x144, + SOCK_MMCSD_SDIO_SR = 0x164, + SOCK_MMCSD_SYSTEM_CONTROL = 0x168, + SOCK_MMCSD_SYSTEM_STATUS = 0x16c, + SOCK_MS_COMMAND = 0x184, + SOCK_MS_DATA = 0x188, + SOCK_MS_STATUS = 0x18c, + SOCK_MS_SYSTEM = 0x190, + SOCK_FIFO_ACCESS = 0x200 }; + + +#define TIFM_IRQ_ENABLE 0x80000000 +#define TIFM_IRQ_SOCKMASK 0x00000001 +#define TIFM_IRQ_CARDMASK 0x00000100 +#define TIFM_IRQ_FIFOMASK 0x00010000 +#define TIFM_IRQ_SETALL 0xffffffff +#define TIFM_IRQ_SETALLSOCK 0x0000000f + +#define TIFM_CTRL_LED 0x00000040 +#define TIFM_CTRL_FAST_CLK 0x00000100 + +#define TIFM_SOCK_STATE_OCCUPIED 0x00000008 +#define TIFM_SOCK_STATE_POWERED 0x00000080 + +#define TIFM_FIFO_ENABLE 0x00000001 /* Meaning of this constant is unverified */ +#define TIFM_FIFO_INT_SETALL 0x0000ffff +#define TIFM_FIFO_INTMASK 0x00000005 /* Meaning of this constant is unverified */ + +#define TIFM_DMA_RESET 0x00000002 /* Meaning of this constant is unverified */ +#define TIFM_DMA_TX 0x00008000 /* Meaning of this constant is unverified */ +#define TIFM_DMA_EN 0x00000001 /* Meaning of this constant is unverified */ + +typedef enum {FM_NULL = 0, FM_XD = 0x01, FM_MS = 0x02, FM_SD = 0x03} tifm_media_id; + +struct tifm_driver; +struct tifm_dev { + char __iomem *addr; + spinlock_t lock; + tifm_media_id media_id; + char wq_name[KOBJ_NAME_LEN]; + struct workqueue_struct *wq; + + unsigned int (*signal_irq)(struct tifm_dev *sock, + unsigned int sock_irq_status); + + struct tifm_driver *drv; + struct device dev; +}; + +struct tifm_driver { + tifm_media_id *id_table; + int (*probe)(struct tifm_dev *dev); + void (*remove)(struct tifm_dev *dev); + + struct device_driver driver; +}; + +struct tifm_adapter { + char __iomem *addr; + unsigned int irq_status; + unsigned int insert_mask; + unsigned int remove_mask; + spinlock_t lock; + unsigned int id; + unsigned int max_sockets; + char wq_name[KOBJ_NAME_LEN]; + unsigned int inhibit_new_cards; + struct workqueue_struct *wq; + struct work_struct media_inserter; + struct work_struct media_remover; + struct tifm_dev **sockets; + struct class_device cdev; + struct device *dev; + + void (*eject)(struct tifm_adapter *fm, struct tifm_dev *sock); +}; + +struct tifm_adapter *tifm_alloc_adapter(void); +void tifm_free_device(struct device *dev); +void tifm_free_adapter(struct tifm_adapter *fm); +int tifm_add_adapter(struct tifm_adapter *fm); +void tifm_remove_adapter(struct tifm_adapter *fm); +struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id); +int tifm_register_driver(struct tifm_driver *drv); +void tifm_unregister_driver(struct tifm_driver *drv); +void tifm_eject(struct tifm_dev *sock); +int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, + int direction); +void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, + int direction); + + +static inline void *tifm_get_drvdata(struct tifm_dev *dev) +{ + return dev_get_drvdata(&dev->dev); +} + +static inline void tifm_set_drvdata(struct tifm_dev *dev, void *data) +{ + dev_set_drvdata(&dev->dev, data); +} + +struct tifm_device_id { + tifm_media_id media_id; +}; + +#endif |