diff options
Diffstat (limited to 'drivers/usb/host/hc_crisv10.c')
| -rw-r--r-- | drivers/usb/host/hc_crisv10.c | 4550 |
1 files changed, 0 insertions, 4550 deletions
diff --git a/drivers/usb/host/hc_crisv10.c b/drivers/usb/host/hc_crisv10.c deleted file mode 100644 index 32f7caf2474..00000000000 --- a/drivers/usb/host/hc_crisv10.c +++ /dev/null @@ -1,4550 +0,0 @@ -/* - * usb-host.c: ETRAX 100LX USB Host Controller Driver (HCD) - * - * Copyright (c) 2002, 2003 Axis Communications AB. - */ - -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/unistd.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/list.h> -#include <linux/spinlock.h> - -#include <asm/uaccess.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/dma.h> -#include <asm/system.h> -#include <asm/arch/svinto.h> - -#include <linux/usb.h> -/* Ugly include because we don't live with the other host drivers. */ -#include <../drivers/usb/core/hcd.h> -#include <../drivers/usb/core/usb.h> - -#include "hc_crisv10.h" - -#define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR -#define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR -#define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR - -static const char *usb_hcd_version = "$Revision: 1.2 $"; - -#undef KERN_DEBUG -#define KERN_DEBUG "" - - -#undef USB_DEBUG_RH -#undef USB_DEBUG_EPID -#undef USB_DEBUG_SB -#undef USB_DEBUG_DESC -#undef USB_DEBUG_URB -#undef USB_DEBUG_TRACE -#undef USB_DEBUG_BULK -#undef USB_DEBUG_CTRL -#undef USB_DEBUG_INTR -#undef USB_DEBUG_ISOC - -#ifdef USB_DEBUG_RH -#define dbg_rh(format, arg...) printk(KERN_DEBUG __FILE__ ": (RH) " format "\n" , ## arg) -#else -#define dbg_rh(format, arg...) do {} while (0) -#endif - -#ifdef USB_DEBUG_EPID -#define dbg_epid(format, arg...) printk(KERN_DEBUG __FILE__ ": (EPID) " format "\n" , ## arg) -#else -#define dbg_epid(format, arg...) do {} while (0) -#endif - -#ifdef USB_DEBUG_SB -#define dbg_sb(format, arg...) printk(KERN_DEBUG __FILE__ ": (SB) " format "\n" , ## arg) -#else -#define dbg_sb(format, arg...) do {} while (0) -#endif - -#ifdef USB_DEBUG_CTRL -#define dbg_ctrl(format, arg...) printk(KERN_DEBUG __FILE__ ": (CTRL) " format "\n" , ## arg) -#else -#define dbg_ctrl(format, arg...) do {} while (0) -#endif - -#ifdef USB_DEBUG_BULK -#define dbg_bulk(format, arg...) printk(KERN_DEBUG __FILE__ ": (BULK) " format "\n" , ## arg) -#else -#define dbg_bulk(format, arg...) do {} while (0) -#endif - -#ifdef USB_DEBUG_INTR -#define dbg_intr(format, arg...) printk(KERN_DEBUG __FILE__ ": (INTR) " format "\n" , ## arg) -#else -#define dbg_intr(format, arg...) do {} while (0) -#endif - -#ifdef USB_DEBUG_ISOC -#define dbg_isoc(format, arg...) printk(KERN_DEBUG __FILE__ ": (ISOC) " format "\n" , ## arg) -#else -#define dbg_isoc(format, arg...) do {} while (0) -#endif - -#ifdef USB_DEBUG_TRACE -#define DBFENTER (printk(": Entering: %s\n", __FUNCTION__)) -#define DBFEXIT (printk(": Exiting: %s\n", __FUNCTION__)) -#else -#define DBFENTER do {} while (0) -#define DBFEXIT do {} while (0) -#endif - -#define usb_pipeslow(pipe) (((pipe) >> 26) & 1) - -/*------------------------------------------------------------------- - Virtual Root Hub - -------------------------------------------------------------------*/ - -static __u8 root_hub_dev_des[] = -{ - 0x12, /* __u8 bLength; */ - 0x01, /* __u8 bDescriptorType; Device */ - 0x00, /* __le16 bcdUSB; v1.0 */ - 0x01, - 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ - 0x00, /* __u8 bDeviceSubClass; */ - 0x00, /* __u8 bDeviceProtocol; */ - 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */ - 0x00, /* __le16 idVendor; */ - 0x00, - 0x00, /* __le16 idProduct; */ - 0x00, - 0x00, /* __le16 bcdDevice; */ - 0x00, - 0x00, /* __u8 iManufacturer; */ - 0x02, /* __u8 iProduct; */ - 0x01, /* __u8 iSerialNumber; */ - 0x01 /* __u8 bNumConfigurations; */ -}; - -/* Configuration descriptor */ -static __u8 root_hub_config_des[] = -{ - 0x09, /* __u8 bLength; */ - 0x02, /* __u8 bDescriptorType; Configuration */ - 0x19, /* __le16 wTotalLength; */ - 0x00, - 0x01, /* __u8 bNumInterfaces; */ - 0x01, /* __u8 bConfigurationValue; */ - 0x00, /* __u8 iConfiguration; */ - 0x40, /* __u8 bmAttributes; Bit 7: Bus-powered */ - 0x00, /* __u8 MaxPower; */ - - /* interface */ - 0x09, /* __u8 if_bLength; */ - 0x04, /* __u8 if_bDescriptorType; Interface */ - 0x00, /* __u8 if_bInterfaceNumber; */ - 0x00, /* __u8 if_bAlternateSetting; */ - 0x01, /* __u8 if_bNumEndpoints; */ - 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ - 0x00, /* __u8 if_bInterfaceSubClass; */ - 0x00, /* __u8 if_bInterfaceProtocol; */ - 0x00, /* __u8 if_iInterface; */ - - /* endpoint */ - 0x07, /* __u8 ep_bLength; */ - 0x05, /* __u8 ep_bDescriptorType; Endpoint */ - 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ - 0x03, /* __u8 ep_bmAttributes; Interrupt */ - 0x08, /* __le16 ep_wMaxPacketSize; 8 Bytes */ - 0x00, - 0xff /* __u8 ep_bInterval; 255 ms */ -}; - -static __u8 root_hub_hub_des[] = -{ - 0x09, /* __u8 bLength; */ - 0x29, /* __u8 bDescriptorType; Hub-descriptor */ - 0x02, /* __u8 bNbrPorts; */ - 0x00, /* __u16 wHubCharacteristics; */ - 0x00, - 0x01, /* __u8 bPwrOn2pwrGood; 2ms */ - 0x00, /* __u8 bHubContrCurrent; 0 mA */ - 0x00, /* __u8 DeviceRemovable; *** 7 Ports max *** */ - 0xff /* __u8 PortPwrCtrlMask; *** 7 ports max *** */ -}; - -static DEFINE_TIMER(bulk_start_timer, NULL, 0, 0); -static DEFINE_TIMER(bulk_eot_timer, NULL, 0, 0); - -/* We want the start timer to expire before the eot timer, because the former might start - traffic, thus making it unnecessary for the latter to time out. */ -#define BULK_START_TIMER_INTERVAL (HZ/10) /* 100 ms */ -#define BULK_EOT_TIMER_INTERVAL (HZ/10+2) /* 120 ms */ - -#define OK(x) len = (x); dbg_rh("OK(%d): line: %d", x, __LINE__); break -#define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \ -{panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);} - -#define SLAB_FLAG (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL) -#define KMALLOC_FLAG (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL) - -/* Most helpful debugging aid */ -#define assert(expr) ((void) ((expr) ? 0 : (err("assert failed at line %d",__LINE__)))) - -/* Alternative assert define which stops after a failed assert. */ -/* -#define assert(expr) \ -{ \ - if (!(expr)) { \ - err("assert failed at line %d",__LINE__); \ - while (1); \ - } \ -} -*/ - - -/* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it dynamically? - To adjust it dynamically we would have to get an interrupt when we reach the end - of the rx descriptor list, or when we get close to the end, and then allocate more - descriptors. */ - -#define NBR_OF_RX_DESC 512 -#define RX_DESC_BUF_SIZE 1024 -#define RX_BUF_SIZE (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE) - -/* The number of epids is, among other things, used for pre-allocating - ctrl, bulk and isoc EP descriptors (one for each epid). - Assumed to be > 1 when initiating the DMA lists. */ -#define NBR_OF_EPIDS 32 - -/* Support interrupt traffic intervals up to 128 ms. */ -#define MAX_INTR_INTERVAL 128 - -/* If periodic traffic (intr or isoc) is to be used, then one entry in the EP table - must be "invalid". By this we mean that we shouldn't care about epid attentions - for this epid, or at least handle them differently from epid attentions for "valid" - epids. This define determines which one to use (don't change it). */ -#define INVALID_EPID 31 -/* A special epid for the bulk dummys. */ -#define DUMMY_EPID 30 - -/* This is just a software cache for the valid entries in R_USB_EPT_DATA. */ -static __u32 epid_usage_bitmask; - -/* A bitfield to keep information on in/out traffic is needed to uniquely identify - an endpoint on a device, since the most significant bit which indicates traffic - direction is lacking in the ep_id field (ETRAX epids can handle both in and - out traffic on endpoints that are otherwise identical). The USB framework, however, - relies on them to be handled separately. For example, bulk IN and OUT urbs cannot - be queued in the same list, since they would block each other. */ -static __u32 epid_out_traffic; - -/* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line. - Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be cache aligned. */ -static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32))); -static volatile USB_IN_Desc_t RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4))); - -/* Pointers into RxDescList. */ -static volatile USB_IN_Desc_t *myNextRxDesc; -static volatile USB_IN_Desc_t *myLastRxDesc; -static volatile USB_IN_Desc_t *myPrevRxDesc; - -/* EP descriptors must be 32-bit aligned. */ -static volatile USB_EP_Desc_t TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); -static volatile USB_EP_Desc_t TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); -/* After each enabled bulk EP (IN or OUT) we put two disabled EP descriptors with the eol flag set, - causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which - gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the - EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors - in each frame. */ -static volatile USB_EP_Desc_t TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4))); - -static volatile USB_EP_Desc_t TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); -static volatile USB_SB_Desc_t TxIsocSB_zout __attribute__ ((aligned (4))); - -static volatile USB_EP_Desc_t TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4))); -static volatile USB_SB_Desc_t TxIntrSB_zout __attribute__ ((aligned (4))); - -/* A zout transfer makes a memory access at the address of its buf pointer, which means that setting - this buf pointer to 0 will cause an access to the flash. In addition to this, setting sw_len to 0 - results in a 16/32 bytes (depending on DMA burst size) transfer. Instead, we set it to 1, and point - it to this buffer. */ -static int zout_buffer[4] __attribute__ ((aligned (4))); - -/* Cache for allocating new EP and SB descriptors. */ -static struct kmem_cache *usb_desc_cache; - -/* Cache for the registers allocated in the top half. */ -static struct kmem_cache *top_half_reg_cache; - -/* Cache for the data allocated in the isoc descr top half. */ -static struct kmem_cache *isoc_compl_cache; - -static struct usb_bus *etrax_usb_bus; - -/* This is a circular (double-linked) list of the active urbs for each epid. - The head is never removed, and new urbs are linked onto the list as - urb_entry_t elements. Don't reference urb_list directly; use the wrapper - functions instead. Note that working with these lists might require spinlock - protection. */ -static struct list_head urb_list[NBR_OF_EPIDS]; - -/* Read about the need and usage of this lock in submit_ctrl_urb. */ -static spinlock_t urb_list_lock; - -/* Used when unlinking asynchronously. */ -static struct list_head urb_unlink_list; - -/* for returning string descriptors in UTF-16LE */ -static int ascii2utf (char *ascii, __u8 *utf, int utfmax) -{ - int retval; - - for (retval = 0; *ascii && utfmax > 1; utfmax -= 2, retval += 2) { - *utf++ = *ascii++ & 0x7f; - *utf++ = 0; - } - return retval; -} - -static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len) -{ - char buf [30]; - - // assert (len > (2 * (sizeof (buf) + 1))); - // assert (strlen (type) <= 8); - - // language ids - if (id == 0) { - *data++ = 4; *data++ = 3; /* 4 bytes data */ - *data++ = 0; *data++ = 0; /* some language id */ - return 4; - - // serial number - } else if (id == 1) { - sprintf (buf, "%x", serial); - - // product description - } else if (id == 2) { - sprintf (buf, "USB %s Root Hub", type); - - // id 3 == vendor description - - // unsupported IDs --> "stall" - } else - return 0; - - data [0] = 2 + ascii2utf (buf, data + 2, len - 2); - data [1] = 3; - return data [0]; -} - -/* Wrappers around the list functions (include/linux/list.h). */ - -static inline int urb_list_empty(int epid) -{ - return list_empty(&urb_list[epid]); -} - -/* Returns first urb for this epid, or NULL if list is empty. */ -static inline struct urb *urb_list_first(int epid) -{ - struct urb *first_urb = 0; - - if (!urb_list_empty(epid)) { - /* Get the first urb (i.e. head->next). */ - urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list); - first_urb = urb_entry->urb; - } - return first_urb; -} - -/* Adds an urb_entry last in the list for this epid. */ -static inline void urb_list_add(struct urb *urb, int epid) -{ - urb_entry_t *urb_entry = kmalloc(sizeof(urb_entry_t), KMALLOC_FLAG); - assert(urb_entry); - - urb_entry->urb = urb; - list_add_tail(&urb_entry->list, &urb_list[epid]); -} - -/* Search through the list for an element that contains this urb. (The list - is expected to be short and the one we are about to delete will often be - the first in the list.) */ -static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid) -{ - struct list_head *entry; - struct list_head *tmp; - urb_entry_t *urb_entry; - - list_for_each_safe(entry, tmp, &urb_list[epid]) { - urb_entry = list_entry(entry, urb_entry_t, list); - assert(urb_entry); - assert(urb_entry->urb); - - if (urb_entry->urb == urb) { - return urb_entry; - } - } - return 0; -} - -/* Delete an urb from the list. */ -static inline void urb_list_del(struct urb *urb, int epid) -{ - urb_entry_t *urb_entry = __urb_list_entry(urb, epid); - assert(urb_entry); - - /* Delete entry and free. */ - list_del(&urb_entry->list); - kfree(urb_entry); -} - -/* Move an urb to the end of the list. */ -static inline void urb_list_move_last(struct urb *urb, int epid) -{ - urb_entry_t *urb_entry = __urb_list_entry(urb, epid); - assert(urb_entry); - - list_move_tail(&urb_entry->list, &urb_list[epid]); -} - -/* Get the next urb in the list. */ -static inline struct urb *urb_list_next(struct urb *urb, int epid) -{ - urb_entry_t *urb_entry = __urb_list_entry(urb, epid); - - assert(urb_entry); - - if (urb_entry->list.next != &urb_list[epid]) { - struct list_head *elem = urb_entry->list.next; - urb_entry = list_entry(elem, urb_entry_t, list); - return urb_entry->urb; - } else { - return NULL; - } -} - - - -/* For debug purposes only. */ -static inline void urb_list_dump(int epid) -{ - struct list_head *entry; - struct list_head *tmp; - urb_entry_t *urb_entry; - int i = 0; - - info("Dumping urb list for epid %d", epid); - - list_for_each_safe(entry, tmp, &urb_list[epid]) { - urb_entry = list_entry(entry, urb_entry_t, list); - info(" entry %d, urb = 0x%lx", i, (unsigned long)urb_entry->urb); - } -} - -static void init_rx_buffers(void); -static int etrax_rh_unlink_urb(struct urb *urb); -static void etrax_rh_send_irq(struct urb *urb); -static void etrax_rh_init_int_timer(struct urb *urb); -static void etrax_rh_int_timer_do(unsigned long ptr); - -static int etrax_usb_setup_epid(struct urb *urb); -static int etrax_usb_lookup_epid(struct urb *urb); -static int etrax_usb_allocate_epid(void); -static void etrax_usb_free_epid(int epid); - -static int etrax_remove_from_sb_list(struct urb *urb); - -static void* etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size, - unsigned mem_flags, dma_addr_t *dma); -static void etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma); - -static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid); -static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid); -static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid); -static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid); - -static int etrax_usb_submit_bulk_urb(struct urb *urb); -static int etrax_usb_submit_ctrl_urb(struct urb *urb); -static int etrax_usb_submit_intr_urb(struct urb *urb); -static int etrax_usb_submit_isoc_urb(struct urb *urb); - -static int etrax_usb_submit_urb(struct urb *urb, unsigned mem_flags); -static int etrax_usb_unlink_urb(struct urb *urb, int status); -static int etrax_usb_get_frame_number(struct usb_device *usb_dev); - -static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc); -static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc); -static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc); -static void etrax_usb_hc_interrupt_bottom_half(void *data); - -static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data); - - -/* The following is a list of interrupt handlers for the host controller interrupts we use. - They are called from etrax_usb_hc_interrupt_bottom_half. */ -static void etrax_usb_hc_isoc_eof_interrupt(void); -static void etrax_usb_hc_bulk_eot_interrupt(int timer_induced); -static void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg); -static void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg); -static void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg); - -static int etrax_rh_submit_urb (struct urb *urb); - -/* Forward declaration needed because they are used in the rx interrupt routine. */ -static void etrax_usb_complete_urb(struct urb *urb, int status); -static void etrax_usb_complete_bulk_urb(struct urb *urb, int status); -static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status); -static void etrax_usb_complete_intr_urb(struct urb *urb, int status); -static void etrax_usb_complete_isoc_urb(struct urb *urb, int status); - -static int etrax_usb_hc_init(void); -static void etrax_usb_hc_cleanup(void); - -static struct usb_operations etrax_usb_device_operations = -{ - .get_frame_number = etrax_usb_get_frame_number, - .submit_urb = etrax_usb_submit_urb, - .unlink_urb = etrax_usb_unlink_urb, - .buffer_alloc = etrax_usb_buffer_alloc, - .buffer_free = etrax_usb_buffer_free -}; - -/* Note that these functions are always available in their "__" variants, for use in - error situations. The "__" missing variants are controlled by the USB_DEBUG_DESC/ - USB_DEBUG_URB macros. */ -static void __dump_urb(struct urb* purb) -{ - printk("\nurb :0x%08lx\n", (unsigned long)purb); - printk("dev :0x%08lx\n", (unsigned long)purb->dev); - printk("pipe :0x%08x\n", purb->pipe); - printk("status :%d\n", purb->status); - printk("transfer_flags :0x%08x\n", purb->transfer_flags); - printk("transfer_buffer :0x%08lx\n", (unsigned long)purb->transfer_buffer); - printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length); - printk("actual_length :%d\n", purb->actual_length); - printk("setup_packet :0x%08lx\n", (unsigned long)purb->setup_packet); - printk("start_frame :%d\n", purb->start_frame); - printk("number_of_packets :%d\n", purb->number_of_packets); - printk("interval :%d\n", purb->interval); - printk("error_count :%d\n", purb->error_count); - printk("context :0x%08lx\n", (unsigned long)purb->context); - printk("complete :0x%08lx\n\n", (unsigned long)purb->complete); -} - -static void __dump_in_desc(volatile USB_IN_Desc_t *in) -{ - printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in); - printk(" sw_len : 0x%04x (%d)\n", in->sw_len, in->sw_len); - printk(" command : 0x%04x\n", in->command); - printk(" next : 0x%08lx\n", in->next); - printk(" buf : 0x%08lx\n", in->buf); - printk(" hw_len : 0x%04x (%d)\n", in->hw_len, in->hw_len); - printk(" status : 0x%04x\n\n", in->status); -} - -static void __dump_sb_desc(volatile USB_SB_Desc_t *sb) -{ - char tt = (sb->command & 0x30) >> 4; - char *tt_string; - - switch (tt) { - case 0: - tt_string = "zout"; - break; - case 1: - tt_string = "in"; - break; - case 2: - tt_string = "out"; - break; - case 3: - tt_string = "setup"; - break; - default: - tt_string = "unknown (weird)"; - } - - printk("\n USB_SB_Desc at 0x%08lx\n", (unsigned long)sb); - printk(" command : 0x%04x\n", sb->command); - printk(" rem : %d\n", (sb->command & 0x3f00) >> 8); - printk(" full : %d\n", (sb->command & 0x40) >> 6); - printk(" tt : %d (%s)\n", tt, tt_string); - printk(" intr : %d\n", (sb->command & 0x8) >> 3); - printk(" eot : %d\n", (sb->command & 0x2) >> 1); - printk(" eol : %d\n", sb->command & 0x1); - printk(" sw_len : 0x%04x (%d)\n", sb->sw_len, sb->sw_len); - printk(" next : 0x%08lx\n", sb->next); - printk(" buf : 0x%08lx\n\n", sb->buf); -} - - -static void __dump_ep_desc(volatile USB_EP_Desc_t *ep) -{ - printk("\nUSB_EP_Desc at 0x%08lx\n", (unsigned long)ep); - printk(" command : 0x%04x\n", ep->command); - printk(" ep_id : %d\n", (ep->command & 0x1f00) >> 8); - printk(" enable : %d\n", (ep->command & 0x10) >> 4); - printk(" intr : %d\n", (ep->command & 0x8) >> 3); - printk(" eof : %d\n", (ep->command & 0x2) >> 1); - printk(" eol : %d\n", ep->command & 0x1); - printk(" hw_len : 0x%04x (%d)\n", ep->hw_len, ep->hw_len); - printk(" next : 0x%08lx\n", ep->next); - printk(" sub : 0x%08lx\n\n", ep->sub); -} - -static inline void __dump_ep_list(int pipe_type) -{ - volatile USB_EP_Desc_t *ep; - volatile USB_EP_Desc_t *first_ep; - volatile USB_SB_Desc_t *sb; - - switch (pipe_type) - { - case PIPE_BULK: - first_ep = &TxBulkEPList[0]; - break; - case PIPE_CONTROL: - first_ep = &TxCtrlEPList[0]; - break; - case PIPE_INTERRUPT: - first_ep = &TxIntrEPList[0]; - break; - case PIPE_ISOCHRONOUS: - first_ep = &TxIsocEPList[0]; - break; - default: - warn("Cannot dump unknown traffic type"); - return; - } - ep = first_ep; - - printk("\n\nDumping EP list...\n\n"); - - do { - __dump_ep_desc(ep); - /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */ - sb = ep->sub ? phys_to_virt(ep->sub) : 0; - while (sb) { - __dump_sb_desc(sb); - sb = sb->next ? phys_to_virt(sb->next) : 0; - } - ep = (volatile USB_EP_Desc_t *)(phys_to_virt(ep->next)); - - } while (ep != first_ep); -} - -static inline void __dump_ept_data(int epid) -{ - unsigned long flags; - __u32 r_usb_ept_data; - - if (epid < 0 || epid > 31) { - printk("Cannot dump ept data for invalid epid %d\n", epid); - return; - } - - save_flags(flags); - cli(); - *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); - nop(); - r_usb_ept_data = *R_USB_EPT_DATA; - restore_flags(flags); - - printk("\nR_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid); - if (r_usb_ept_data == 0) { - /* No need for more detailed printing. */ - return; - } - printk(" valid : %d\n", (r_usb_ept_data & 0x80000000) >> 31); - printk(" hold : %d\n", (r_usb_ept_data & 0x40000000) >> 30); - printk(" error_count_in : %d\n", (r_usb_ept_data & 0x30000000) >> 28); - printk(" t_in : %d\n", (r_usb_ept_data & 0x08000000) >> 27); - printk(" low_speed : %d\n", (r_usb_ept_data & 0x04000000) >> 26); - printk(" port : %d\n", (r_usb_ept_data & 0x03000000) >> 24); - printk(" error_code : %d\n", (r_usb_ept_data & 0x00c00000) >> 22); - printk(" t_out : %d\n", (r_usb_ept_data & 0x00200000) >> 21); - printk(" error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19); - printk(" max_len : %d\n", (r_usb_ept_data & 0x0003f800) >> 11); - printk(" ep : %d\n", (r_usb_ept_data & 0x00000780) >> 7); - printk(" dev : %d\n", (r_usb_ept_data & 0x0000003f)); -} - -static inline void __dump_ept_data_list(void) -{ - int i; - - printk("Dumping the whole R_USB_EPT_DATA list\n"); - - for (i = 0; i < 32; i++) { - __dump_ept_data(i); - } -} -#ifdef USB_DEBUG_DESC -#define dump_in_desc(...) __dump_in_desc(...) -#define dump_sb_desc(...) __dump_sb_desc(...) -#define dump_ep_desc(...) __dump_ep_desc(...) -#else -#define dump_in_desc(...) do {} while (0) -#define dump_sb_desc(...) do {} while (0) -#define dump_ep_desc(...) do {} while (0) -#endif - -#ifdef USB_DEBUG_URB -#define dump_urb(x) __dump_urb(x) -#else -#define dump_urb(x) do {} while (0) -#endif - -static void init_rx_buffers(void) -{ - int i; - - DBFENTER; - - for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) { - RxDescList[i].sw_len = RX_DESC_BUF_SIZE; - RxDescList[i].command = 0; - RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]); - RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE)); - RxDescList[i].hw_len = 0; - RxDescList[i].status = 0; - - /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as USB_IN_Desc - for the relevant fields.) */ - prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]); - - } - - RxDescList[i].sw_len = RX_DESC_BUF_SIZE; - RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes); - RxDescList[i].next = virt_to_phys(&RxDescList[0]); - RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE)); - RxDescList[i].hw_len = 0; - RxDescList[i].status = 0; - - myNextRxDesc = &RxDescList[0]; - myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; - myPrevRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; - - *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc); - *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start); - - DBFEXIT; -} - -static void init_tx_bulk_ep(void) -{ - int i; - - DBFENTER; - - for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { - CHECK_ALIGN(&TxBulkEPList[i]); - TxBulkEPList[i].hw_len = 0; - TxBulkEPList[i].command = IO_FIELD(USB_EP_command, epid, i); - TxBulkEPList[i].sub = 0; - TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[i + 1]); - - /* Initiate two EPs, disabled and with the eol flag set. No need for any - preserved epid. */ - - /* The first one has the intr flag set so we get an interrupt when the DMA - channel is about to become disabled. */ - CHECK_ALIGN(&TxBulkDummyEPList[i][0]); - TxBulkDummyEPList[i][0].hw_len = 0; - TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) | - IO_STATE(USB_EP_command, eol, yes) | - IO_STATE(USB_EP_command, intr, yes)); - TxBulkDummyEPList[i][0].sub = 0; - TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]); - - /* The second one. */ - CHECK_ALIGN(&TxBulkDummyEPList[i][1]); - TxBulkDummyEPList[i][1].hw_len = 0; - TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) | - IO_STATE(USB_EP_command, eol, yes)); - TxBulkDummyEPList[i][1].sub = 0; - /* The last dummy's next pointer is the same as the current EP's next pointer. */ - TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]); - } - - /* Configure the last one. */ - CHECK_ALIGN(&TxBulkEPList[i]); - TxBulkEPList[i].hw_len = 0; - TxBulkEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) | - IO_FIELD(USB_EP_command, epid, i)); - TxBulkEPList[i].sub = 0; - TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[0]); - - /* No need configuring dummy EPs for the last one as it will never be used for - bulk traffic (i == INVALD_EPID at this point). */ - - /* Set up to start on the last EP so we will enable it when inserting traffic - for the first time (imitating the situation where the DMA has stopped - because there was no more traffic). */ - *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]); - /* No point in starting the bulk channel yet. - *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */ - DBFEXIT; -} - -static void init_tx_ctrl_ep(void) -{ - int i; - - DBFENTER; - - for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { - CHECK_ALIGN(&TxCtrlEPList[i]); - TxCtrlEPList[i].hw_len = 0; - TxCtrlEPList[i].command = IO_FIELD(USB_EP_command, epid, i); - TxCtrlEPList[i].sub = 0; - TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[i + 1]); - } - - CHECK_ALIGN(&TxCtrlEPList[i]); - TxCtrlEPList[i].hw_len = 0; - TxCtrlEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) | - IO_FIELD(USB_EP_command, epid, i)); - - TxCtrlEPList[i].sub = 0; - TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[0]); - - *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[0]); - *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start); - - DBFEXIT; -} - - -static void init_tx_intr_ep(void) -{ - int i; - - DBFENTER; - - /* Read comment at zout_buffer declaration for an explanation to this. */ - TxIntrSB_zout.sw_len = 1; - TxIntrSB_zout.next = 0; - TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]); - TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) | - IO_STATE(USB_SB_command, tt, zout) | - IO_STATE(USB_SB_command, full, yes) | - IO_STATE(USB_SB_command, eot, yes) | - IO_STATE(USB_SB_command, eol, yes)); - - for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) { - CHECK_ALIGN(&TxIntrEPList[i]); - TxIntrEPList[i].hw_len = 0; - TxIntrEPList[i].command = - (IO_STATE(USB_EP_command, eof, yes) | - IO_STATE(USB_EP_command, enable, yes) | - IO_FIELD(USB_EP_command, epid, INVALID_EPID)); - TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout); - TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]); - } - - CHECK_ALIGN(&TxIntrEPList[i]); - TxIntrEPList[i].hw_len = 0; - TxIntrEPList[i].command = - (IO_STATE(USB_EP_command, eof, yes) | - IO_STATE(USB_EP_command, eol, yes) | - IO_STATE(USB_EP_command, enable, yes) | - IO_FIELD(USB_EP_command, epid, INVALID_EPID)); - TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout); - TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]); - - *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]); - *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start); - DBFEXIT; -} - -static void init_tx_isoc_ep(void) -{ - int i; - - DBFENTER; - - /* Read comment at zout_buffer declaration for an explanation to this. */ - TxIsocSB_zout.sw_len = 1; - TxIsocSB_zout.next = 0; - TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]); - TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) | - IO_STATE(USB_SB_command, tt, zout) | - IO_STATE(USB_SB_command, full, yes) | - IO_STATE(USB_SB_command, eot, yes) | - IO_STATE(USB_SB_command, eol, yes)); - - /* The last isochronous EP descriptor is a dummy. */ - - for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { - CHECK_ALIGN(&TxIsocEPList[i]); - TxIsocEPList[i].hw_len = 0; - TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i); - TxIsocEPList[i].sub = 0; - TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]); - } - - CHECK_ALIGN(&TxIsocEPList[i]); - TxIsocEPList[i].hw_len = 0; - - /* Must enable the last EP descr to get eof interrupt. */ - TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) | - IO_STATE(USB_EP_command, eof, yes) | - IO_STATE(USB_EP_command, eol, yes) | - IO_FIELD(USB_EP_command, epid, INVALID_EPID)); - TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout); - TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]); - - *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]); - *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start); - - DBFEXIT; -} - -static void etrax_usb_unlink_intr_urb(struct urb *urb) -{ - volatile USB_EP_Desc_t *first_ep; /* First EP in the list. */ - volatile USB_EP_Desc_t *curr_ep; /* Current EP, the iterator. */ - volatile USB_EP_Desc_t *next_ep; /* The EP after current. */ - volatile USB_EP_Desc_t *unlink_ep; /* The one we should remove from the list. */ - - int epid; - - /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the List". */ - - DBFENTER; - - epid = ((etrax_urb_priv_t *)urb->hcpriv)->epid; - - first_ep = &TxIntrEPList[0]; - curr_ep = first_ep; - - - /* Note that this loop removes all EP descriptors with this epid. This assumes - that all EP descriptors belong to the one and only urb for this epid. */ - - do { - next_ep = (USB_EP_Desc_t *)phys_to_virt(curr_ep->next); - - if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) { - - dbg_intr("Found EP to unlink for epid %d", epid); - - /* This is the one we should unlink. */ - unlink_ep = next_ep; - - /* Actually unlink the EP from the DMA list. */ - curr_ep->next = unlink_ep->next; - - /* Wait until the DMA is no longer at this descriptor. */ - while (*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep)); - - /* Now we are free to remove it and its SB descriptor. - Note that it is assumed here that there is only one sb in the - sb list for this ep. */ - kmem_cache_free(usb_desc_cache, phys_to_virt(unlink_ep->sub)); - kmem_cache_free(usb_desc_cache, (USB_EP_Desc_t *)unlink_ep); - } - - curr_ep = phys_to_virt(curr_ep->next); - - } while (curr_ep != first_ep); - urb->hcpriv = NULL; -} - -void etrax_usb_do_intr_recover(int epid) -{ - USB_EP_Desc_t *first_ep, *tmp_ep; - - DBFENTER; - - first_ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB2_EP); - tmp_ep = first_ep; - - /* What this does is simply to walk the list of interrupt - ep descriptors and enable those that are disabled. */ - - do { - if (IO_EXTRACT(USB_EP_command, epid, tmp_ep->command) == epid && - !(tmp_ep->command & IO_MASK(USB_EP_command, enable))) { - tmp_ep->command |= IO_STATE(USB_EP_command, enable, yes); - } - - tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next); - - } while (tmp_ep != first_ep); - - - DBFEXIT; -} - -static int etrax_rh_unlink_urb (struct urb *urb) -{ - etrax_hc_t *hc; - - DBFENTER; - - hc = urb->dev->bus->hcpriv; - - if (hc->rh.urb == urb) { - hc->rh.send = 0; - del_timer(&hc->rh.rh_int_timer); - } - - DBFEXIT; - return 0; -} - -static void etrax_rh_send_irq(struct urb *urb) -{ - __u16 data = 0; - etrax_hc_t *hc = urb->dev->bus->hcpriv; - DBFENTER; - -/* - dbg_rh("R_USB_FM_NUMBER : 0x%08X", *R_USB_FM_NUMBER); - dbg_rh("R_USB_FM_REMAINING: 0x%08X", *R_USB_FM_REMAINING); -*/ - - data |= (hc->rh.wPortChange_1) ? (1 << 1) : 0; - data |= (hc->rh.wPortChange_2) ? (1 << 2) : 0; - - *((__u16 *)urb->transfer_buffer) = cpu_to_le16(data); - /* FIXME: Why is actual_length set to 1 when data is 2 bytes? - Since only 1 byte is used, why not declare data as __u8? */ - urb->actual_length = 1; - urb->status = 0; - - if (hc->rh.send && urb->complete) { - dbg_rh("wPortChange_1: 0x%04X", hc->rh.wPortChange_1); - dbg_rh("wPortChange_2: 0x%04X", hc->rh.wPortChange_2); - - urb->complete(urb, NULL); - } - - DBFEXIT; -} - -static void etrax_rh_init_int_timer(struct urb *urb) -{ - etrax_hc_t *hc; - - DBFENTER; - - hc = urb->dev->bus->hcpriv; - hc->rh.interval = urb->interval; - init_timer(&hc->rh.rh_int_timer); - hc->rh.rh_int_timer.function = etrax_rh_int_timer_do; - hc->rh.rh_int_timer.data = (unsigned long)urb; - /* FIXME: Is the jiffies resolution enough? All intervals < 10 ms will be mapped - to 0, and the rest to the nearest lower 10 ms. */ - hc->rh.rh_int_timer.expires = jiffies + ((HZ * hc->rh.interval) / 1000); - add_timer(&hc->rh.rh_int_timer); - - DBFEXIT; -} - -static void etrax_rh_int_timer_do(unsigned long ptr) -{ - struct urb *urb; - etrax_hc_t *hc; - - DBFENTER; - - urb = (struct urb*)ptr; - hc = urb->dev->bus->hcpriv; - - if (hc->rh.send) { - etrax_rh_send_irq(urb); - } - - DBFEXIT; -} - -static int etrax_usb_setup_epid(struct urb *urb) -{ - int epid; - char devnum, endpoint, out_traffic, s |