![Warren Free](/assets/img/avatar_default.png)
The option driver (and presumably others) allocates several URBs when it opens and tries to free them when it closes. The isp1760_urb_dequeue function gets called, but the packet being dequeued is not necessarily at the front of one of the 32 queues. If not, the isp1760_urb_done function doesn't get called for the URB and the process trying to free it hangs forever on a wait_queue. This patch does two things. If the URB being dequeued has others queued behind it, it re-queues them. And it searches the queues looking for the URB being dequeued rather than just looking at the one at the front of the queue. [bigeasy@linutronix] whitespace fixes, reformating Cc: stable <stable@kernel.org> Signed-off-by: Warren Free <wfree@ipmn.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2322 lines
55 KiB
C
2322 lines
55 KiB
C
/*
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* Driver for the NXP ISP1760 chip
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*
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* However, the code might contain some bugs. What doesn't work for sure is:
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* - ISO
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* - OTG
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e The interrupt line is configured as active low, level.
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*
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* (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/usb.h>
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#include <linux/io.h>
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#include <asm/unaligned.h>
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#include "../core/hcd.h"
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#include "isp1760-hcd.h"
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static struct kmem_cache *qtd_cachep;
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static struct kmem_cache *qh_cachep;
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struct isp1760_hcd {
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u32 hcs_params;
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spinlock_t lock;
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struct inter_packet_info atl_ints[32];
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struct inter_packet_info int_ints[32];
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struct memory_chunk memory_pool[BLOCKS];
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/* periodic schedule support */
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#define DEFAULT_I_TDPS 1024
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unsigned periodic_size;
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unsigned i_thresh;
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unsigned long reset_done;
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unsigned long next_statechange;
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unsigned int devflags;
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};
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static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
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{
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return (struct isp1760_hcd *) (hcd->hcd_priv);
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}
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static inline struct usb_hcd *priv_to_hcd(struct isp1760_hcd *priv)
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{
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return container_of((void *) priv, struct usb_hcd, hcd_priv);
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}
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/* Section 2.2 Host Controller Capability Registers */
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#define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
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#define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
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#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
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#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
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#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
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#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
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#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
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/* Section 2.3 Host Controller Operational Registers */
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#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
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#define CMD_RESET (1<<1) /* reset HC not bus */
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#define CMD_RUN (1<<0) /* start/stop HC */
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#define STS_PCD (1<<2) /* port change detect */
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#define FLAG_CF (1<<0) /* true: we'll support "high speed" */
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#define PORT_OWNER (1<<13) /* true: companion hc owns this port */
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#define PORT_POWER (1<<12) /* true: has power (see PPC) */
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#define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */
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#define PORT_RESET (1<<8) /* reset port */
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#define PORT_SUSPEND (1<<7) /* suspend port */
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#define PORT_RESUME (1<<6) /* resume it */
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#define PORT_PE (1<<2) /* port enable */
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#define PORT_CSC (1<<1) /* connect status change */
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#define PORT_CONNECT (1<<0) /* device connected */
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#define PORT_RWC_BITS (PORT_CSC)
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struct isp1760_qtd {
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struct isp1760_qtd *hw_next;
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u8 packet_type;
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u8 toggle;
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void *data_buffer;
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/* the rest is HCD-private */
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struct list_head qtd_list;
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struct urb *urb;
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size_t length;
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/* isp special*/
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u32 status;
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#define URB_COMPLETE_NOTIFY (1 << 0)
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#define URB_ENQUEUED (1 << 1)
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#define URB_TYPE_ATL (1 << 2)
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#define URB_TYPE_INT (1 << 3)
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};
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struct isp1760_qh {
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/* first part defined by EHCI spec */
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struct list_head qtd_list;
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struct isp1760_hcd *priv;
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/* periodic schedule info */
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unsigned short period; /* polling interval */
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struct usb_device *dev;
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u32 toggle;
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u32 ping;
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};
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#define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)
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static unsigned int isp1760_readl(__u32 __iomem *regs)
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{
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return readl(regs);
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}
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static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
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{
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writel(val, regs);
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}
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/*
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* The next two copy via MMIO data to/from the device. memcpy_{to|from}io()
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* doesn't quite work because some people have to enforce 32-bit access
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*/
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static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
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__u32 __iomem *dst, u32 len)
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{
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u32 val;
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u8 *buff8;
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if (!src) {
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printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
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return;
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}
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while (len >= 4) {
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*src = __raw_readl(dst);
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len -= 4;
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src++;
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dst++;
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}
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if (!len)
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return;
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/* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
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* allocated.
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*/
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val = isp1760_readl(dst);
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buff8 = (u8 *)src;
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while (len) {
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*buff8 = val;
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val >>= 8;
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len--;
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buff8++;
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}
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}
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static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
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__u32 __iomem *dst, u32 len)
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{
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while (len >= 4) {
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__raw_writel(*src, dst);
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len -= 4;
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src++;
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dst++;
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}
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if (!len)
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return;
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/* in case we have 3, 2 or 1 by left. The buffer is allocated and the
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* extra bytes should not be read by the HW
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*/
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__raw_writel(*src, dst);
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}
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/* memory management of the 60kb on the chip from 0x1000 to 0xffff */
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static void init_memory(struct isp1760_hcd *priv)
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{
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int i;
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u32 payload;
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payload = 0x1000;
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for (i = 0; i < BLOCK_1_NUM; i++) {
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priv->memory_pool[i].start = payload;
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priv->memory_pool[i].size = BLOCK_1_SIZE;
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priv->memory_pool[i].free = 1;
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payload += priv->memory_pool[i].size;
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}
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for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
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priv->memory_pool[i].start = payload;
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priv->memory_pool[i].size = BLOCK_2_SIZE;
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priv->memory_pool[i].free = 1;
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payload += priv->memory_pool[i].size;
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}
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for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
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priv->memory_pool[i].start = payload;
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priv->memory_pool[i].size = BLOCK_3_SIZE;
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priv->memory_pool[i].free = 1;
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payload += priv->memory_pool[i].size;
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}
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BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
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}
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static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
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{
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int i;
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if (!size)
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return ISP1760_NULL_POINTER;
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for (i = 0; i < BLOCKS; i++) {
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if (priv->memory_pool[i].size >= size &&
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priv->memory_pool[i].free) {
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priv->memory_pool[i].free = 0;
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return priv->memory_pool[i].start;
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}
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}
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printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
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size);
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printk(KERN_ERR "Current memory map:\n");
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for (i = 0; i < BLOCKS; i++) {
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printk(KERN_ERR "Pool %2d size %4d status: %d\n",
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i, priv->memory_pool[i].size,
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priv->memory_pool[i].free);
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}
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/* XXX maybe -ENOMEM could be possible */
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BUG();
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return 0;
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}
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static void free_mem(struct isp1760_hcd *priv, u32 mem)
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{
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int i;
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if (mem == ISP1760_NULL_POINTER)
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return;
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for (i = 0; i < BLOCKS; i++) {
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if (priv->memory_pool[i].start == mem) {
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BUG_ON(priv->memory_pool[i].free);
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priv->memory_pool[i].free = 1;
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return ;
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}
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}
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printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
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mem);
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BUG();
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}
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static void isp1760_init_regs(struct usb_hcd *hcd)
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{
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isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
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isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
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HC_ATL_PTD_SKIPMAP_REG);
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isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
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HC_INT_PTD_SKIPMAP_REG);
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isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
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HC_ISO_PTD_SKIPMAP_REG);
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isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
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HC_ATL_PTD_DONEMAP_REG);
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isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
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HC_INT_PTD_DONEMAP_REG);
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isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
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HC_ISO_PTD_DONEMAP_REG);
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}
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static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
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u32 mask, u32 done, int usec)
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{
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u32 result;
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do {
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result = isp1760_readl(ptr);
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if (result == ~0)
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return -ENODEV;
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result &= mask;
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if (result == done)
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return 0;
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udelay(1);
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usec--;
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} while (usec > 0);
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return -ETIMEDOUT;
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}
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/* reset a non-running (STS_HALT == 1) controller */
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static int ehci_reset(struct isp1760_hcd *priv)
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{
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int retval;
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struct usb_hcd *hcd = priv_to_hcd(priv);
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u32 command = isp1760_readl(hcd->regs + HC_USBCMD);
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command |= CMD_RESET;
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isp1760_writel(command, hcd->regs + HC_USBCMD);
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hcd->state = HC_STATE_HALT;
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priv->next_statechange = jiffies;
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retval = handshake(priv, hcd->regs + HC_USBCMD,
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CMD_RESET, 0, 250 * 1000);
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return retval;
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}
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static void qh_destroy(struct isp1760_qh *qh)
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{
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BUG_ON(!list_empty(&qh->qtd_list));
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kmem_cache_free(qh_cachep, qh);
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}
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static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
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gfp_t flags)
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{
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struct isp1760_qh *qh;
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qh = kmem_cache_zalloc(qh_cachep, flags);
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if (!qh)
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return qh;
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INIT_LIST_HEAD(&qh->qtd_list);
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qh->priv = priv;
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return qh;
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}
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/* magic numbers that can affect system performance */
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#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
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#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
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#define EHCI_TUNE_RL_TT 0
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#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
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#define EHCI_TUNE_MULT_TT 1
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#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
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/* one-time init, only for memory state */
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static int priv_init(struct usb_hcd *hcd)
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{
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struct isp1760_hcd *priv = hcd_to_priv(hcd);
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u32 hcc_params;
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spin_lock_init(&priv->lock);
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/*
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* hw default: 1K periodic list heads, one per frame.
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* periodic_size can shrink by USBCMD update if hcc_params allows.
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*/
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priv->periodic_size = DEFAULT_I_TDPS;
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/* controllers may cache some of the periodic schedule ... */
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hcc_params = isp1760_readl(hcd->regs + HC_HCCPARAMS);
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/* full frame cache */
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if (HCC_ISOC_CACHE(hcc_params))
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priv->i_thresh = 8;
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else /* N microframes cached */
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priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
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return 0;
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}
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static int isp1760_hc_setup(struct usb_hcd *hcd)
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{
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struct isp1760_hcd *priv = hcd_to_priv(hcd);
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int result;
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u32 scratch, hwmode;
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/* Setup HW Mode Control: This assumes a level active-low interrupt */
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hwmode = HW_DATA_BUS_32BIT;
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if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
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hwmode &= ~HW_DATA_BUS_32BIT;
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if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
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hwmode |= HW_ANA_DIGI_OC;
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if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
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hwmode |= HW_DACK_POL_HIGH;
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if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
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hwmode |= HW_DREQ_POL_HIGH;
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/*
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* We have to set this first in case we're in 16-bit mode.
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* Write it twice to ensure correct upper bits if switching
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* to 16-bit mode.
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*/
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isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
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isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
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isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
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/* Change bus pattern */
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scratch = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
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scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
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if (scratch != 0xdeadbabe) {
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printk(KERN_ERR "ISP1760: Scratch test failed.\n");
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return -ENODEV;
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}
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/* pre reset */
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isp1760_init_regs(hcd);
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/* reset */
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isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
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mdelay(100);
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isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
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mdelay(100);
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result = ehci_reset(priv);
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if (result)
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return result;
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/* Step 11 passed */
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isp1760_info(priv, "bus width: %d, oc: %s\n",
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(priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
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16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
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"analog" : "digital");
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/* ATL reset */
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isp1760_writel(hwmode | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
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mdelay(10);
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isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
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isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
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isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
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/*
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* PORT 1 Control register of the ISP1760 is the OTG control
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* register on ISP1761. Since there is no OTG or device controller
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* support in this driver, we use port 1 as a "normal" USB host port on
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* both chips.
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*/
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isp1760_writel(PORT1_POWER | PORT1_INIT2,
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hcd->regs + HC_PORT1_CTRL);
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mdelay(10);
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priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
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return priv_init(hcd);
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}
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static void isp1760_init_maps(struct usb_hcd *hcd)
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{
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/*set last maps, for iso its only 1, else 32 tds bitmap*/
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isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
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isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
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isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
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}
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static void isp1760_enable_interrupts(struct usb_hcd *hcd)
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{
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isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
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isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
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isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
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isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
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isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
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isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
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|
/* step 23 passed */
|
|
}
|
|
|
|
static int isp1760_run(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int retval;
|
|
u32 temp;
|
|
u32 command;
|
|
u32 chipid;
|
|
|
|
hcd->uses_new_polling = 1;
|
|
hcd->poll_rh = 0;
|
|
|
|
hcd->state = HC_STATE_RUNNING;
|
|
isp1760_enable_interrupts(hcd);
|
|
temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
|
|
isp1760_writel(temp | HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
|
|
|
|
command = isp1760_readl(hcd->regs + HC_USBCMD);
|
|
command &= ~(CMD_LRESET|CMD_RESET);
|
|
command |= CMD_RUN;
|
|
isp1760_writel(command, hcd->regs + HC_USBCMD);
|
|
|
|
retval = handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
|
|
250 * 1000);
|
|
if (retval)
|
|
return retval;
|
|
|
|
/*
|
|
* XXX
|
|
* Spec says to write FLAG_CF as last config action, priv code grabs
|
|
* the semaphore while doing so.
|
|
*/
|
|
down_write(&ehci_cf_port_reset_rwsem);
|
|
isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);
|
|
|
|
retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
|
|
250 * 1000);
|
|
up_write(&ehci_cf_port_reset_rwsem);
|
|
if (retval)
|
|
return retval;
|
|
|
|
chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
|
|
isp1760_info(priv, "USB ISP %04x HW rev. %d started\n", chipid & 0xffff,
|
|
chipid >> 16);
|
|
|
|
/* PTD Register Init Part 2, Step 28 */
|
|
/* enable INTs */
|
|
isp1760_init_maps(hcd);
|
|
|
|
/* GRR this is run-once init(), being done every time the HC starts.
|
|
* So long as they're part of class devices, we can't do it init()
|
|
* since the class device isn't created that early.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static u32 base_to_chip(u32 base)
|
|
{
|
|
return ((base - 0x400) >> 3);
|
|
}
|
|
|
|
static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd, struct urb *urb,
|
|
u32 payload, struct ptd *ptd)
|
|
{
|
|
u32 dw0;
|
|
u32 dw1;
|
|
u32 dw2;
|
|
u32 dw3;
|
|
u32 maxpacket;
|
|
u32 multi;
|
|
u32 pid_code;
|
|
u32 rl = RL_COUNTER;
|
|
u32 nak = NAK_COUNTER;
|
|
|
|
/* according to 3.6.2, max packet len can not be > 0x400 */
|
|
maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
|
|
multi = 1 + ((maxpacket >> 11) & 0x3);
|
|
maxpacket &= 0x7ff;
|
|
|
|
/* DW0 */
|
|
dw0 = PTD_VALID;
|
|
dw0 |= PTD_LENGTH(qtd->length);
|
|
dw0 |= PTD_MAXPACKET(maxpacket);
|
|
dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
|
|
dw1 = usb_pipeendpoint(urb->pipe) >> 1;
|
|
|
|
/* DW1 */
|
|
dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));
|
|
|
|
pid_code = qtd->packet_type;
|
|
dw1 |= PTD_PID_TOKEN(pid_code);
|
|
|
|
if (usb_pipebulk(urb->pipe))
|
|
dw1 |= PTD_TRANS_BULK;
|
|
else if (usb_pipeint(urb->pipe))
|
|
dw1 |= PTD_TRANS_INT;
|
|
|
|
if (urb->dev->speed != USB_SPEED_HIGH) {
|
|
/* split transaction */
|
|
|
|
dw1 |= PTD_TRANS_SPLIT;
|
|
if (urb->dev->speed == USB_SPEED_LOW)
|
|
dw1 |= PTD_SE_USB_LOSPEED;
|
|
|
|
dw1 |= PTD_PORT_NUM(urb->dev->ttport);
|
|
dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);
|
|
|
|
/* SE bit for Split INT transfers */
|
|
if (usb_pipeint(urb->pipe) &&
|
|
(urb->dev->speed == USB_SPEED_LOW))
|
|
dw1 |= 2 << 16;
|
|
|
|
dw3 = 0;
|
|
rl = 0;
|
|
nak = 0;
|
|
} else {
|
|
dw0 |= PTD_MULTI(multi);
|
|
if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
|
|
dw3 = qh->ping;
|
|
else
|
|
dw3 = 0;
|
|
}
|
|
/* DW2 */
|
|
dw2 = 0;
|
|
dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
|
|
dw2 |= PTD_RL_CNT(rl);
|
|
dw3 |= PTD_NAC_CNT(nak);
|
|
|
|
/* DW3 */
|
|
if (usb_pipecontrol(urb->pipe))
|
|
dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
|
|
else
|
|
dw3 |= qh->toggle;
|
|
|
|
|
|
dw3 |= PTD_ACTIVE;
|
|
/* Cerr */
|
|
dw3 |= PTD_CERR(ERR_COUNTER);
|
|
|
|
memset(ptd, 0, sizeof(*ptd));
|
|
|
|
ptd->dw0 = cpu_to_le32(dw0);
|
|
ptd->dw1 = cpu_to_le32(dw1);
|
|
ptd->dw2 = cpu_to_le32(dw2);
|
|
ptd->dw3 = cpu_to_le32(dw3);
|
|
}
|
|
|
|
static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd, struct urb *urb,
|
|
u32 payload, struct ptd *ptd)
|
|
{
|
|
u32 maxpacket;
|
|
u32 multi;
|
|
u32 numberofusofs;
|
|
u32 i;
|
|
u32 usofmask, usof;
|
|
u32 period;
|
|
|
|
maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
|
|
multi = 1 + ((maxpacket >> 11) & 0x3);
|
|
maxpacket &= 0x7ff;
|
|
/* length of the data per uframe */
|
|
maxpacket = multi * maxpacket;
|
|
|
|
numberofusofs = urb->transfer_buffer_length / maxpacket;
|
|
if (urb->transfer_buffer_length % maxpacket)
|
|
numberofusofs += 1;
|
|
|
|
usofmask = 1;
|
|
usof = 0;
|
|
for (i = 0; i < numberofusofs; i++) {
|
|
usof |= usofmask;
|
|
usofmask <<= 1;
|
|
}
|
|
|
|
if (urb->dev->speed != USB_SPEED_HIGH) {
|
|
/* split */
|
|
ptd->dw5 = cpu_to_le32(0x1c);
|
|
|
|
if (qh->period >= 32)
|
|
period = qh->period / 2;
|
|
else
|
|
period = qh->period;
|
|
|
|
} else {
|
|
|
|
if (qh->period >= 8)
|
|
period = qh->period/8;
|
|
else
|
|
period = qh->period;
|
|
|
|
if (period >= 32)
|
|
period = 16;
|
|
|
|
if (qh->period >= 8) {
|
|
/* millisecond period */
|
|
period = (period << 3);
|
|
} else {
|
|
/* usof based tranmsfers */
|
|
/* minimum 4 usofs */
|
|
usof = 0x11;
|
|
}
|
|
}
|
|
|
|
ptd->dw2 |= cpu_to_le32(period);
|
|
ptd->dw4 = cpu_to_le32(usof);
|
|
}
|
|
|
|
static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd, struct urb *urb,
|
|
u32 payload, struct ptd *ptd)
|
|
{
|
|
transform_into_atl(priv, qh, qtd, urb, payload, ptd);
|
|
transform_add_int(priv, qh, qtd, urb, payload, ptd);
|
|
}
|
|
|
|
static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
|
|
u32 token)
|
|
{
|
|
int count;
|
|
|
|
qtd->data_buffer = databuffer;
|
|
qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
|
|
qtd->toggle = GET_DATA_TOGGLE(token);
|
|
|
|
if (len > HC_ATL_PL_SIZE)
|
|
count = HC_ATL_PL_SIZE;
|
|
else
|
|
count = len;
|
|
|
|
qtd->length = count;
|
|
return count;
|
|
}
|
|
|
|
static int check_error(struct ptd *ptd)
|
|
{
|
|
int error = 0;
|
|
u32 dw3;
|
|
|
|
dw3 = le32_to_cpu(ptd->dw3);
|
|
if (dw3 & DW3_HALT_BIT)
|
|
error = -EPIPE;
|
|
|
|
if (dw3 & DW3_ERROR_BIT) {
|
|
printk(KERN_ERR "error bit is set in DW3\n");
|
|
error = -EPIPE;
|
|
}
|
|
|
|
if (dw3 & DW3_QTD_ACTIVE) {
|
|
printk(KERN_ERR "transfer active bit is set DW3\n");
|
|
printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
|
|
(le32_to_cpu(ptd->dw2) >> 25) & 0xf);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static void check_int_err_status(u32 dw4)
|
|
{
|
|
u32 i;
|
|
|
|
dw4 >>= 8;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
switch (dw4 & 0x7) {
|
|
case INT_UNDERRUN:
|
|
printk(KERN_ERR "ERROR: under run , %d\n", i);
|
|
break;
|
|
|
|
case INT_EXACT:
|
|
printk(KERN_ERR "ERROR: transaction error, %d\n", i);
|
|
break;
|
|
|
|
case INT_BABBLE:
|
|
printk(KERN_ERR "ERROR: babble error, %d\n", i);
|
|
break;
|
|
}
|
|
dw4 >>= 3;
|
|
}
|
|
}
|
|
|
|
static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
|
|
u32 payload)
|
|
{
|
|
u32 token;
|
|
struct usb_hcd *hcd = priv_to_hcd(priv);
|
|
|
|
token = qtd->packet_type;
|
|
|
|
if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
|
|
switch (token) {
|
|
case IN_PID:
|
|
break;
|
|
case OUT_PID:
|
|
case SETUP_PID:
|
|
priv_write_copy(priv, qtd->data_buffer,
|
|
hcd->regs + payload,
|
|
qtd->length);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
|
|
struct isp1760_hcd *priv, struct isp1760_qh *qh,
|
|
struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
|
|
{
|
|
struct ptd ptd;
|
|
struct usb_hcd *hcd = priv_to_hcd(priv);
|
|
|
|
transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
|
|
priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
|
|
enqueue_one_qtd(qtd, priv, payload);
|
|
|
|
priv->atl_ints[slot].urb = urb;
|
|
priv->atl_ints[slot].qh = qh;
|
|
priv->atl_ints[slot].qtd = qtd;
|
|
priv->atl_ints[slot].data_buffer = qtd->data_buffer;
|
|
priv->atl_ints[slot].payload = payload;
|
|
qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
|
|
qtd->status |= slot << 16;
|
|
}
|
|
|
|
static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
|
|
struct isp1760_hcd *priv, struct isp1760_qh *qh,
|
|
struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
|
|
{
|
|
struct ptd ptd;
|
|
struct usb_hcd *hcd = priv_to_hcd(priv);
|
|
|
|
transform_into_int(priv, qh, qtd, urb, payload, &ptd);
|
|
priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
|
|
enqueue_one_qtd(qtd, priv, payload);
|
|
|
|
priv->int_ints[slot].urb = urb;
|
|
priv->int_ints[slot].qh = qh;
|
|
priv->int_ints[slot].qtd = qtd;
|
|
priv->int_ints[slot].data_buffer = qtd->data_buffer;
|
|
priv->int_ints[slot].payload = payload;
|
|
qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
|
|
qtd->status |= slot << 16;
|
|
}
|
|
|
|
static void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 skip_map, or_map;
|
|
u32 queue_entry;
|
|
u32 slot;
|
|
u32 atl_regs, payload;
|
|
u32 buffstatus;
|
|
|
|
/*
|
|
* When this function is called from the interrupt handler to enqueue
|
|
* a follow-up packet, the SKIP register gets written and read back
|
|
* almost immediately. With ISP1761, this register requires a delay of
|
|
* 195ns between a write and subsequent read (see section 15.1.1.3).
|
|
*/
|
|
ndelay(195);
|
|
skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
|
|
|
|
BUG_ON(!skip_map);
|
|
slot = __ffs(skip_map);
|
|
queue_entry = 1 << slot;
|
|
|
|
atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);
|
|
|
|
payload = alloc_mem(priv, qtd->length);
|
|
|
|
enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);
|
|
|
|
or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
|
|
or_map |= queue_entry;
|
|
isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
|
|
|
|
skip_map &= ~queue_entry;
|
|
isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
|
|
|
|
buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
|
|
buffstatus |= ATL_BUFFER;
|
|
isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
|
|
}
|
|
|
|
static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 skip_map, or_map;
|
|
u32 queue_entry;
|
|
u32 slot;
|
|
u32 int_regs, payload;
|
|
u32 buffstatus;
|
|
|
|
/*
|
|
* When this function is called from the interrupt handler to enqueue
|
|
* a follow-up packet, the SKIP register gets written and read back
|
|
* almost immediately. With ISP1761, this register requires a delay of
|
|
* 195ns between a write and subsequent read (see section 15.1.1.3).
|
|
*/
|
|
ndelay(195);
|
|
skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);
|
|
|
|
BUG_ON(!skip_map);
|
|
slot = __ffs(skip_map);
|
|
queue_entry = 1 << slot;
|
|
|
|
int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);
|
|
|
|
payload = alloc_mem(priv, qtd->length);
|
|
|
|
enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);
|
|
|
|
or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
|
|
or_map |= queue_entry;
|
|
isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
|
|
|
|
skip_map &= ~queue_entry;
|
|
isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);
|
|
|
|
buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
|
|
buffstatus |= INT_BUFFER;
|
|
isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
|
|
}
|
|
|
|
static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
|
|
__releases(priv->lock)
|
|
__acquires(priv->lock)
|
|
{
|
|
if (!urb->unlinked) {
|
|
if (status == -EINPROGRESS)
|
|
status = 0;
|
|
}
|
|
|
|
/* complete() can reenter this HCD */
|
|
usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
|
|
spin_unlock(&priv->lock);
|
|
usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
|
|
spin_lock(&priv->lock);
|
|
}
|
|
|
|
static void isp1760_qtd_free(struct isp1760_qtd *qtd)
|
|
{
|
|
kmem_cache_free(qtd_cachep, qtd);
|
|
}
|
|
|
|
static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
|
|
{
|
|
struct isp1760_qtd *tmp_qtd;
|
|
|
|
tmp_qtd = qtd->hw_next;
|
|
list_del(&qtd->qtd_list);
|
|
isp1760_qtd_free(qtd);
|
|
return tmp_qtd;
|
|
}
|
|
|
|
/*
|
|
* Remove this QTD from the QH list and free its memory. If this QTD
|
|
* isn't the last one than remove also his successor(s).
|
|
* Returns the QTD which is part of an new URB and should be enqueued.
|
|
*/
|
|
static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
|
|
{
|
|
struct isp1760_qtd *tmp_qtd;
|
|
int last_one;
|
|
|
|
do {
|
|
tmp_qtd = qtd->hw_next;
|
|
last_one = qtd->status & URB_COMPLETE_NOTIFY;
|
|
list_del(&qtd->qtd_list);
|
|
isp1760_qtd_free(qtd);
|
|
qtd = tmp_qtd;
|
|
} while (!last_one && qtd);
|
|
|
|
return qtd;
|
|
}
|
|
|
|
static void do_atl_int(struct usb_hcd *usb_hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
|
|
u32 done_map, skip_map;
|
|
struct ptd ptd;
|
|
struct urb *urb = NULL;
|
|
u32 atl_regs_base;
|
|
u32 atl_regs;
|
|
u32 queue_entry;
|
|
u32 payload;
|
|
u32 length;
|
|
u32 or_map;
|
|
u32 status = -EINVAL;
|
|
int error;
|
|
struct isp1760_qtd *qtd;
|
|
struct isp1760_qh *qh;
|
|
u32 rl;
|
|
u32 nakcount;
|
|
|
|
done_map = isp1760_readl(usb_hcd->regs +
|
|
HC_ATL_PTD_DONEMAP_REG);
|
|
skip_map = isp1760_readl(usb_hcd->regs +
|
|
HC_ATL_PTD_SKIPMAP_REG);
|
|
|
|
or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
|
|
or_map &= ~done_map;
|
|
isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
|
|
|
|
atl_regs_base = ATL_REGS_OFFSET;
|
|
while (done_map) {
|
|
u32 dw1;
|
|
u32 dw2;
|
|
u32 dw3;
|
|
|
|
status = 0;
|
|
|
|
queue_entry = __ffs(done_map);
|
|
done_map &= ~(1 << queue_entry);
|
|
skip_map |= 1 << queue_entry;
|
|
|
|
atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);
|
|
|
|
urb = priv->atl_ints[queue_entry].urb;
|
|
qtd = priv->atl_ints[queue_entry].qtd;
|
|
qh = priv->atl_ints[queue_entry].qh;
|
|
payload = priv->atl_ints[queue_entry].payload;
|
|
|
|
if (!qh) {
|
|
printk(KERN_ERR "qh is 0\n");
|
|
continue;
|
|
}
|
|
isp1760_writel(atl_regs + ISP_BANK(0), usb_hcd->regs +
|
|
HC_MEMORY_REG);
|
|
isp1760_writel(payload + ISP_BANK(1), usb_hcd->regs +
|
|
HC_MEMORY_REG);
|
|
/*
|
|
* write bank1 address twice to ensure the 90ns delay (time
|
|
* between BANK0 write and the priv_read_copy() call is at
|
|
* least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 109ns)
|
|
*/
|
|
isp1760_writel(payload + ISP_BANK(1), usb_hcd->regs +
|
|
HC_MEMORY_REG);
|
|
|
|
priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs +
|
|
ISP_BANK(0), sizeof(ptd));
|
|
|
|
dw1 = le32_to_cpu(ptd.dw1);
|
|
dw2 = le32_to_cpu(ptd.dw2);
|
|
dw3 = le32_to_cpu(ptd.dw3);
|
|
rl = (dw2 >> 25) & 0x0f;
|
|
nakcount = (dw3 >> 19) & 0xf;
|
|
|
|
/* Transfer Error, *but* active and no HALT -> reload */
|
|
if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
|
|
!(dw3 & DW3_HALT_BIT)) {
|
|
|
|
/* according to ppriv code, we have to
|
|
* reload this one if trasfered bytes != requested bytes
|
|
* else act like everything went smooth..
|
|
* XXX This just doesn't feel right and hasn't
|
|
* triggered so far.
|
|
*/
|
|
|
|
length = PTD_XFERRED_LENGTH(dw3);
|
|
printk(KERN_ERR "Should reload now.... transfered %d "
|
|
"of %zu\n", length, qtd->length);
|
|
BUG();
|
|
}
|
|
|
|
if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
|
|
u32 buffstatus;
|
|
|
|
/* XXX
|
|
* NAKs are handled in HW by the chip. Usually if the
|
|
* device is not able to send data fast enough.
|
|
* This did not trigger for a long time now.
|
|
*/
|
|
printk(KERN_ERR "Reloading ptd %p/%p... qh %p readed: "
|
|
"%d of %zu done: %08x cur: %08x\n", qtd,
|
|
urb, qh, PTD_XFERRED_LENGTH(dw3),
|
|
qtd->length, done_map,
|
|
(1 << queue_entry));
|
|
|
|
/* RL counter = ERR counter */
|
|
dw3 &= ~(0xf << 19);
|
|
dw3 |= rl << 19;
|
|
dw3 &= ~(3 << (55 - 32));
|
|
dw3 |= ERR_COUNTER << (55 - 32);
|
|
|
|
/*
|
|
* It is not needed to write skip map back because it
|
|
* is unchanged. Just make sure that this entry is
|
|
* unskipped once it gets written to the HW.
|
|
*/
|
|
skip_map &= ~(1 << queue_entry);
|
|
or_map = isp1760_readl(usb_hcd->regs +
|
|
HC_ATL_IRQ_MASK_OR_REG);
|
|
or_map |= 1 << queue_entry;
|
|
isp1760_writel(or_map, usb_hcd->regs +
|
|
HC_ATL_IRQ_MASK_OR_REG);
|
|
|
|
ptd.dw3 = cpu_to_le32(dw3);
|
|
priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
|
|
atl_regs, sizeof(ptd));
|
|
|
|
ptd.dw0 |= cpu_to_le32(PTD_VALID);
|
|
priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
|
|
atl_regs, sizeof(ptd));
|
|
|
|
buffstatus = isp1760_readl(usb_hcd->regs +
|
|
HC_BUFFER_STATUS_REG);
|
|
buffstatus |= ATL_BUFFER;
|
|
isp1760_writel(buffstatus, usb_hcd->regs +
|
|
HC_BUFFER_STATUS_REG);
|
|
continue;
|
|
}
|
|
|
|
error = check_error(&ptd);
|
|
if (error) {
|
|
status = error;
|
|
priv->atl_ints[queue_entry].qh->toggle = 0;
|
|
priv->atl_ints[queue_entry].qh->ping = 0;
|
|
urb->status = -EPIPE;
|
|
|
|
#if 0
|
|
printk(KERN_ERR "Error in %s().\n", __func__);
|
|
printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
|
|
"dw3: %08x dw4: %08x dw5: %08x dw6: "
|
|
"%08x dw7: %08x\n",
|
|
ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
|
|
ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
|
|
#endif
|
|
} else {
|
|
if (usb_pipetype(urb->pipe) == PIPE_BULK) {
|
|
priv->atl_ints[queue_entry].qh->toggle = dw3 &
|
|
(1 << 25);
|
|
priv->atl_ints[queue_entry].qh->ping = dw3 &
|
|
(1 << 26);
|
|
}
|
|
}
|
|
|
|
length = PTD_XFERRED_LENGTH(dw3);
|
|
if (length) {
|
|
switch (DW1_GET_PID(dw1)) {
|
|
case IN_PID:
|
|
priv_read_copy(priv,
|
|
priv->atl_ints[queue_entry].data_buffer,
|
|
usb_hcd->regs + payload + ISP_BANK(1),
|
|
length);
|
|
|
|
case OUT_PID:
|
|
|
|
urb->actual_length += length;
|
|
|
|
case SETUP_PID:
|
|
break;
|
|
}
|
|
}
|
|
|
|
priv->atl_ints[queue_entry].data_buffer = NULL;
|
|
priv->atl_ints[queue_entry].urb = NULL;
|
|
priv->atl_ints[queue_entry].qtd = NULL;
|
|
priv->atl_ints[queue_entry].qh = NULL;
|
|
|
|
free_mem(priv, payload);
|
|
|
|
isp1760_writel(skip_map, usb_hcd->regs +
|
|
HC_ATL_PTD_SKIPMAP_REG);
|
|
|
|
if (urb->status == -EPIPE) {
|
|
/* HALT was received */
|
|
|
|
qtd = clean_up_qtdlist(qtd);
|
|
isp1760_urb_done(priv, urb, urb->status);
|
|
|
|
} else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
|
|
/* short BULK received */
|
|
|
|
if (urb->transfer_flags & URB_SHORT_NOT_OK) {
|
|
urb->status = -EREMOTEIO;
|
|
isp1760_dbg(priv, "short bulk, %d instead %zu "
|
|
"with URB_SHORT_NOT_OK flag.\n",
|
|
length, qtd->length);
|
|
}
|
|
|
|
if (urb->status == -EINPROGRESS)
|
|
urb->status = 0;
|
|
|
|
qtd = clean_up_qtdlist(qtd);
|
|
|
|
isp1760_urb_done(priv, urb, urb->status);
|
|
|
|
} else if (qtd->status & URB_COMPLETE_NOTIFY) {
|
|
/* that was the last qtd of that URB */
|
|
|
|
if (urb->status == -EINPROGRESS)
|
|
urb->status = 0;
|
|
|
|
qtd = clean_this_qtd(qtd);
|
|
isp1760_urb_done(priv, urb, urb->status);
|
|
|
|
} else {
|
|
/* next QTD of this URB */
|
|
|
|
qtd = clean_this_qtd(qtd);
|
|
BUG_ON(!qtd);
|
|
}
|
|
|
|
if (qtd)
|
|
enqueue_an_ATL_packet(usb_hcd, qh, qtd);
|
|
|
|
skip_map = isp1760_readl(usb_hcd->regs +
|
|
HC_ATL_PTD_SKIPMAP_REG);
|
|
}
|
|
}
|
|
|
|
static void do_intl_int(struct usb_hcd *usb_hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
|
|
u32 done_map, skip_map;
|
|
struct ptd ptd;
|
|
struct urb *urb = NULL;
|
|
u32 int_regs;
|
|
u32 int_regs_base;
|
|
u32 payload;
|
|
u32 length;
|
|
u32 or_map;
|
|
int error;
|
|
u32 queue_entry;
|
|
struct isp1760_qtd *qtd;
|
|
struct isp1760_qh *qh;
|
|
|
|
done_map = isp1760_readl(usb_hcd->regs +
|
|
HC_INT_PTD_DONEMAP_REG);
|
|
skip_map = isp1760_readl(usb_hcd->regs +
|
|
HC_INT_PTD_SKIPMAP_REG);
|
|
|
|
or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
|
|
or_map &= ~done_map;
|
|
isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
|
|
|
|
int_regs_base = INT_REGS_OFFSET;
|
|
|
|
while (done_map) {
|
|
u32 dw1;
|
|
u32 dw3;
|
|
|
|
queue_entry = __ffs(done_map);
|
|
done_map &= ~(1 << queue_entry);
|
|
skip_map |= 1 << queue_entry;
|
|
|
|
int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
|
|
urb = priv->int_ints[queue_entry].urb;
|
|
qtd = priv->int_ints[queue_entry].qtd;
|
|
qh = priv->int_ints[queue_entry].qh;
|
|
payload = priv->int_ints[queue_entry].payload;
|
|
|
|
if (!qh) {
|
|
printk(KERN_ERR "(INT) qh is 0\n");
|
|
continue;
|
|
}
|
|
|
|
isp1760_writel(int_regs + ISP_BANK(0), usb_hcd->regs +
|
|
HC_MEMORY_REG);
|
|
isp1760_writel(payload + ISP_BANK(1), usb_hcd->regs +
|
|
HC_MEMORY_REG);
|
|
/*
|
|
* write bank1 address twice to ensure the 90ns delay (time
|
|
* between BANK0 write and the priv_read_copy() call is at
|
|
* least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
|
|
*/
|
|
isp1760_writel(payload + ISP_BANK(1), usb_hcd->regs +
|
|
HC_MEMORY_REG);
|
|
|
|
priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs +
|
|
ISP_BANK(0), sizeof(ptd));
|
|
dw1 = le32_to_cpu(ptd.dw1);
|
|
dw3 = le32_to_cpu(ptd.dw3);
|
|
check_int_err_status(le32_to_cpu(ptd.dw4));
|
|
|
|
error = check_error(&ptd);
|
|
if (error) {
|
|
#if 0
|
|
printk(KERN_ERR "Error in %s().\n", __func__);
|
|
printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
|
|
"dw3: %08x dw4: %08x dw5: %08x dw6: "
|
|
"%08x dw7: %08x\n",
|
|
ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
|
|
ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
|
|
#endif
|
|
urb->status = -EPIPE;
|
|
priv->int_ints[queue_entry].qh->toggle = 0;
|
|
priv->int_ints[queue_entry].qh->ping = 0;
|
|
|
|
} else {
|
|
priv->int_ints[queue_entry].qh->toggle =
|
|
dw3 & (1 << 25);
|
|
priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
|
|
}
|
|
|
|
if (urb->dev->speed != USB_SPEED_HIGH)
|
|
length = PTD_XFERRED_LENGTH_LO(dw3);
|
|
else
|
|
length = PTD_XFERRED_LENGTH(dw3);
|
|
|
|
if (length) {
|
|
switch (DW1_GET_PID(dw1)) {
|
|
case IN_PID:
|
|
priv_read_copy(priv,
|
|
priv->int_ints[queue_entry].data_buffer,
|
|
usb_hcd->regs + payload + ISP_BANK(1),
|
|
length);
|
|
case OUT_PID:
|
|
|
|
urb->actual_length += length;
|
|
|
|
case SETUP_PID:
|
|
break;
|
|
}
|
|
}
|
|
|
|
priv->int_ints[queue_entry].data_buffer = NULL;
|
|
priv->int_ints[queue_entry].urb = NULL;
|
|
priv->int_ints[queue_entry].qtd = NULL;
|
|
priv->int_ints[queue_entry].qh = NULL;
|
|
|
|
isp1760_writel(skip_map, usb_hcd->regs +
|
|
HC_INT_PTD_SKIPMAP_REG);
|
|
free_mem(priv, payload);
|
|
|
|
if (urb->status == -EPIPE) {
|
|
/* HALT received */
|
|
|
|
qtd = clean_up_qtdlist(qtd);
|
|
isp1760_urb_done(priv, urb, urb->status);
|
|
|
|
} else if (qtd->status & URB_COMPLETE_NOTIFY) {
|
|
|
|
if (urb->status == -EINPROGRESS)
|
|
urb->status = 0;
|
|
|
|
qtd = clean_this_qtd(qtd);
|
|
isp1760_urb_done(priv, urb, urb->status);
|
|
|
|
} else {
|
|
/* next QTD of this URB */
|
|
|
|
qtd = clean_this_qtd(qtd);
|
|
BUG_ON(!qtd);
|
|
}
|
|
|
|
if (qtd)
|
|
enqueue_an_INT_packet(usb_hcd, qh, qtd);
|
|
|
|
skip_map = isp1760_readl(usb_hcd->regs +
|
|
HC_INT_PTD_SKIPMAP_REG);
|
|
}
|
|
}
|
|
|
|
#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
|
|
static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
|
|
gfp_t flags)
|
|
{
|
|
struct isp1760_qh *qh;
|
|
int is_input, type;
|
|
|
|
qh = isp1760_qh_alloc(priv, flags);
|
|
if (!qh)
|
|
return qh;
|
|
|
|
/*
|
|
* init endpoint/device data for this QH
|
|
*/
|
|
is_input = usb_pipein(urb->pipe);
|
|
type = usb_pipetype(urb->pipe);
|
|
|
|
if (type == PIPE_INTERRUPT) {
|
|
|
|
if (urb->dev->speed == USB_SPEED_HIGH) {
|
|
|
|
qh->period = urb->interval >> 3;
|
|
if (qh->period == 0 && urb->interval != 1) {
|
|
/* NOTE interval 2 or 4 uframes could work.
|
|
* But interval 1 scheduling is simpler, and
|
|
* includes high bandwidth.
|
|
*/
|
|
printk(KERN_ERR "intr period %d uframes, NYET!",
|
|
urb->interval);
|
|
qh_destroy(qh);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
qh->period = urb->interval;
|
|
}
|
|
}
|
|
|
|
/* support for tt scheduling, and access to toggles */
|
|
qh->dev = urb->dev;
|
|
|
|
if (!usb_pipecontrol(urb->pipe))
|
|
usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
|
|
1);
|
|
return qh;
|
|
}
|
|
|
|
/*
|
|
* For control/bulk/interrupt, return QH with these TDs appended.
|
|
* Allocates and initializes the QH if necessary.
|
|
* Returns null if it can't allocate a QH it needs to.
|
|
* If the QH has TDs (urbs) already, that's great.
|
|
*/
|
|
static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
|
|
struct urb *urb, struct list_head *qtd_list, int epnum,
|
|
void **ptr)
|
|
{
|
|
struct isp1760_qh *qh;
|
|
struct isp1760_qtd *qtd;
|
|
struct isp1760_qtd *prev_qtd;
|
|
|
|
qh = (struct isp1760_qh *)*ptr;
|
|
if (!qh) {
|
|
/* can't sleep here, we have priv->lock... */
|
|
qh = qh_make(priv, urb, GFP_ATOMIC);
|
|
if (!qh)
|
|
return qh;
|
|
*ptr = qh;
|
|
}
|
|
|
|
qtd = list_entry(qtd_list->next, struct isp1760_qtd,
|
|
qtd_list);
|
|
if (!list_empty(&qh->qtd_list))
|
|
prev_qtd = list_entry(qh->qtd_list.prev,
|
|
struct isp1760_qtd, qtd_list);
|
|
else
|
|
prev_qtd = NULL;
|
|
|
|
list_splice(qtd_list, qh->qtd_list.prev);
|
|
if (prev_qtd) {
|
|
BUG_ON(prev_qtd->hw_next);
|
|
prev_qtd->hw_next = qtd;
|
|
}
|
|
|
|
urb->hcpriv = qh;
|
|
return qh;
|
|
}
|
|
|
|
static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
|
|
struct list_head *qtd_list)
|
|
{
|
|
struct list_head *entry, *temp;
|
|
|
|
list_for_each_safe(entry, temp, qtd_list) {
|
|
struct isp1760_qtd *qtd;
|
|
|
|
qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
|
|
list_del(&qtd->qtd_list);
|
|
isp1760_qtd_free(qtd);
|
|
}
|
|
}
|
|
|
|
static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
|
|
struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
|
|
{
|
|
struct isp1760_qtd *qtd;
|
|
int epnum;
|
|
unsigned long flags;
|
|
struct isp1760_qh *qh = NULL;
|
|
int rc;
|
|
int qh_busy;
|
|
|
|
qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
|
|
epnum = urb->ep->desc.bEndpointAddress;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
|
|
rc = -ESHUTDOWN;
|
|
goto done;
|
|
}
|
|
rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
|
|
if (rc)
|
|
goto done;
|
|
|
|
qh = urb->ep->hcpriv;
|
|
if (qh)
|
|
qh_busy = !list_empty(&qh->qtd_list);
|
|
else
|
|
qh_busy = 0;
|
|
|
|
qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
|
|
if (!qh) {
|
|
usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
|
|
rc = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
if (!qh_busy)
|
|
p(priv_to_hcd(priv), qh, qtd);
|
|
|
|
done:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
if (!qh)
|
|
qtd_list_free(priv, urb, qtd_list);
|
|
return rc;
|
|
}
|
|
|
|
static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
|
|
gfp_t flags)
|
|
{
|
|
struct isp1760_qtd *qtd;
|
|
|
|
qtd = kmem_cache_zalloc(qtd_cachep, flags);
|
|
if (qtd)
|
|
INIT_LIST_HEAD(&qtd->qtd_list);
|
|
|
|
return qtd;
|
|
}
|
|
|
|
/*
|
|
* create a list of filled qtds for this URB; won't link into qh.
|
|
*/
|
|
static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
|
|
struct urb *urb, struct list_head *head, gfp_t flags)
|
|
{
|
|
struct isp1760_qtd *qtd, *qtd_prev;
|
|
void *buf;
|
|
int len, maxpacket;
|
|
int is_input;
|
|
u32 token;
|
|
|
|
/*
|
|
* URBs map to sequences of QTDs: one logical transaction
|
|
*/
|
|
qtd = isp1760_qtd_alloc(priv, flags);
|
|
if (!qtd)
|
|
return NULL;
|
|
|
|
list_add_tail(&qtd->qtd_list, head);
|
|
qtd->urb = urb;
|
|
urb->status = -EINPROGRESS;
|
|
|
|
token = 0;
|
|
/* for split transactions, SplitXState initialized to zero */
|
|
|
|
len = urb->transfer_buffer_length;
|
|
is_input = usb_pipein(urb->pipe);
|
|
if (usb_pipecontrol(urb->pipe)) {
|
|
/* SETUP pid */
|
|
qtd_fill(qtd, urb->setup_packet,
|
|
sizeof(struct usb_ctrlrequest),
|
|
token | SETUP_PID);
|
|
|
|
/* ... and always at least one more pid */
|
|
token ^= DATA_TOGGLE;
|
|
qtd_prev = qtd;
|
|
qtd = isp1760_qtd_alloc(priv, flags);
|
|
if (!qtd)
|
|
goto cleanup;
|
|
qtd->urb = urb;
|
|
qtd_prev->hw_next = qtd;
|
|
list_add_tail(&qtd->qtd_list, head);
|
|
|
|
/* for zero length DATA stages, STATUS is always IN */
|
|
if (len == 0)
|
|
token |= IN_PID;
|
|
}
|
|
|
|
/*
|
|
* data transfer stage: buffer setup
|
|
*/
|
|
buf = urb->transfer_buffer;
|
|
|
|
if (is_input)
|
|
token |= IN_PID;
|
|
else
|
|
token |= OUT_PID;
|
|
|
|
maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
|
|
|
|
/*
|
|
* buffer gets wrapped in one or more qtds;
|
|
* last one may be "short" (including zero len)
|
|
* and may serve as a control status ack
|
|
*/
|
|
for (;;) {
|
|
int this_qtd_len;
|
|
|
|
if (!buf && len) {
|
|
/* XXX This looks like usb storage / SCSI bug */
|
|
printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
|
|
(long unsigned)urb->transfer_dma, len);
|
|
WARN_ON(1);
|
|
}
|
|
|
|
this_qtd_len = qtd_fill(qtd, buf, len, token);
|
|
len -= this_qtd_len;
|
|
buf += this_qtd_len;
|
|
|
|
/* qh makes control packets use qtd toggle; maybe switch it */
|
|
if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
|
|
token ^= DATA_TOGGLE;
|
|
|
|
if (len <= 0)
|
|
break;
|
|
|
|
qtd_prev = qtd;
|
|
qtd = isp1760_qtd_alloc(priv, flags);
|
|
if (!qtd)
|
|
goto cleanup;
|
|
qtd->urb = urb;
|
|
qtd_prev->hw_next = qtd;
|
|
list_add_tail(&qtd->qtd_list, head);
|
|
}
|
|
|
|
/*
|
|
* control requests may need a terminating data "status" ack;
|
|
* bulk ones may need a terminating short packet (zero length).
|
|
*/
|
|
if (urb->transfer_buffer_length != 0) {
|
|
int one_more = 0;
|
|
|
|
if (usb_pipecontrol(urb->pipe)) {
|
|
one_more = 1;
|
|
/* "in" <--> "out" */
|
|
token ^= IN_PID;
|
|
/* force DATA1 */
|
|
token |= DATA_TOGGLE;
|
|
} else if (usb_pipebulk(urb->pipe)
|
|
&& (urb->transfer_flags & URB_ZERO_PACKET)
|
|
&& !(urb->transfer_buffer_length % maxpacket)) {
|
|
one_more = 1;
|
|
}
|
|
if (one_more) {
|
|
qtd_prev = qtd;
|
|
qtd = isp1760_qtd_alloc(priv, flags);
|
|
if (!qtd)
|
|
goto cleanup;
|
|
qtd->urb = urb;
|
|
qtd_prev->hw_next = qtd;
|
|
list_add_tail(&qtd->qtd_list, head);
|
|
|
|
/* never any data in such packets */
|
|
qtd_fill(qtd, NULL, 0, token);
|
|
}
|
|
}
|
|
|
|
qtd->status = URB_COMPLETE_NOTIFY;
|
|
return head;
|
|
|
|
cleanup:
|
|
qtd_list_free(priv, urb, head);
|
|
return NULL;
|
|
}
|
|
|
|
static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
|
|
gfp_t mem_flags)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
struct list_head qtd_list;
|
|
packet_enqueue *pe;
|
|
|
|
INIT_LIST_HEAD(&qtd_list);
|
|
|
|
switch (usb_pipetype(urb->pipe)) {
|
|
case PIPE_CONTROL:
|
|
case PIPE_BULK:
|
|
|
|
if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
|
|
return -ENOMEM;
|
|
pe = enqueue_an_ATL_packet;
|
|
break;
|
|
|
|
case PIPE_INTERRUPT:
|
|
if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
|
|
return -ENOMEM;
|
|
pe = enqueue_an_INT_packet;
|
|
break;
|
|
|
|
case PIPE_ISOCHRONOUS:
|
|
printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
|
|
default:
|
|
return -EPIPE;
|
|
}
|
|
|
|
return isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
|
|
}
|
|
|
|
static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
|
|
int status)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
struct inter_packet_info *ints;
|
|
u32 i;
|
|
u32 reg_base, or_reg, skip_reg;
|
|
unsigned long flags;
|
|
struct ptd ptd;
|
|
packet_enqueue *pe;
|
|
|
|
switch (usb_pipetype(urb->pipe)) {
|
|
case PIPE_ISOCHRONOUS:
|
|
return -EPIPE;
|
|
break;
|
|
|
|
case PIPE_INTERRUPT:
|
|
ints = priv->int_ints;
|
|
reg_base = INT_REGS_OFFSET;
|
|
or_reg = HC_INT_IRQ_MASK_OR_REG;
|
|
skip_reg = HC_INT_PTD_SKIPMAP_REG;
|
|
pe = enqueue_an_INT_packet;
|
|
break;
|
|
|
|
default:
|
|
ints = priv->atl_ints;
|
|
reg_base = ATL_REGS_OFFSET;
|
|
or_reg = HC_ATL_IRQ_MASK_OR_REG;
|
|
skip_reg = HC_ATL_PTD_SKIPMAP_REG;
|
|
pe = enqueue_an_ATL_packet;
|
|
break;
|
|
}
|
|
|
|
memset(&ptd, 0, sizeof(ptd));
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
for (i = 0; i < 32; i++) {
|
|
if (ints->urb == urb) {
|
|
u32 skip_map;
|
|
u32 or_map;
|
|
struct isp1760_qtd *qtd;
|
|
struct isp1760_qh *qh = ints->qh;
|
|
|
|
skip_map = isp1760_readl(hcd->regs + skip_reg);
|
|
skip_map |= 1 << i;
|
|
isp1760_writel(skip_map, hcd->regs + skip_reg);
|
|
|
|
or_map = isp1760_readl(hcd->regs + or_reg);
|
|
or_map &= ~(1 << i);
|
|
isp1760_writel(or_map, hcd->regs + or_reg);
|
|
|
|
priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
|
|
+ i * sizeof(ptd), sizeof(ptd));
|
|
qtd = ints->qtd;
|
|
qtd = clean_up_qtdlist(qtd);
|
|
|
|
free_mem(priv, ints->payload);
|
|
|
|
ints->urb = NULL;
|
|
ints->qh = NULL;
|
|
ints->qtd = NULL;
|
|
ints->data_buffer = NULL;
|
|
ints->payload = 0;
|
|
|
|
isp1760_urb_done(priv, urb, status);
|
|
if (qtd)
|
|
pe(hcd, qh, qtd);
|
|
break;
|
|
|
|
} else if (ints->qtd) {
|
|
struct isp1760_qtd *qtd, *prev_qtd = ints->qtd;
|
|
|
|
for (qtd = ints->qtd->hw_next; qtd; qtd = qtd->hw_next) {
|
|
if (qtd->urb == urb) {
|
|
prev_qtd->hw_next = clean_up_qtdlist(qtd);
|
|
isp1760_urb_done(priv, urb, status);
|
|
break;
|
|
}
|
|
prev_qtd = qtd;
|
|
}
|
|
/* we found the urb before the end of the list */
|
|
if (qtd)
|
|
break;
|
|
}
|
|
ints++;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
|
|
u32 imask;
|
|
irqreturn_t irqret = IRQ_NONE;
|
|
|
|
spin_lock(&priv->lock);
|
|
|
|
if (!(usb_hcd->state & HC_STATE_RUNNING))
|
|
goto leave;
|
|
|
|
imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
|
|
if (unlikely(!imask))
|
|
goto leave;
|
|
|
|
isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
|
|
if (imask & HC_ATL_INT)
|
|
do_atl_int(usb_hcd);
|
|
|
|
if (imask & HC_INTL_INT)
|
|
do_intl_int(usb_hcd);
|
|
|
|
irqret = IRQ_HANDLED;
|
|
leave:
|
|
spin_unlock(&priv->lock);
|
|
return irqret;
|
|
}
|
|
|
|
static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 temp, status = 0;
|
|
u32 mask;
|
|
int retval = 1;
|
|
unsigned long flags;
|
|
|
|
/* if !USB_SUSPEND, root hub timers won't get shut down ... */
|
|
if (!HC_IS_RUNNING(hcd->state))
|
|
return 0;
|
|
|
|
/* init status to no-changes */
|
|
buf[0] = 0;
|
|
mask = PORT_CSC;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
temp = isp1760_readl(hcd->regs + HC_PORTSC1);
|
|
|
|
if (temp & PORT_OWNER) {
|
|
if (temp & PORT_CSC) {
|
|
temp &= ~PORT_CSC;
|
|
isp1760_writel(temp, hcd->regs + HC_PORTSC1);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return status information even for ports with OWNER set.
|
|
* Otherwise khubd wouldn't see the disconnect event when a
|
|
* high-speed device is switched over to the companion
|
|
* controller by the user.
|
|
*/
|
|
|
|
if ((temp & mask) != 0
|
|
|| ((temp & PORT_RESUME) != 0
|
|
&& time_after_eq(jiffies,
|
|
priv->reset_done))) {
|
|
buf [0] |= 1 << (0 + 1);
|
|
status = STS_PCD;
|
|
}
|
|
/* FIXME autosuspend idle root hubs */
|
|
done:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return status ? retval : 0;
|
|
}
|
|
|
|
static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
|
|
struct usb_hub_descriptor *desc)
|
|
{
|
|
int ports = HCS_N_PORTS(priv->hcs_params);
|
|
u16 temp;
|
|
|
|
desc->bDescriptorType = 0x29;
|
|
/* priv 1.0, 2.3.9 says 20ms max */
|
|
desc->bPwrOn2PwrGood = 10;
|
|
desc->bHubContrCurrent = 0;
|
|
|
|
desc->bNbrPorts = ports;
|
|
temp = 1 + (ports / 8);
|
|
desc->bDescLength = 7 + 2 * temp;
|
|
|
|
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
|
|
memset(&desc->bitmap[0], 0, temp);
|
|
memset(&desc->bitmap[temp], 0xff, temp);
|
|
|
|
/* per-port overcurrent reporting */
|
|
temp = 0x0008;
|
|
if (HCS_PPC(priv->hcs_params))
|
|
/* per-port power control */
|
|
temp |= 0x0001;
|
|
else
|
|
/* no power switching */
|
|
temp |= 0x0002;
|
|
desc->wHubCharacteristics = cpu_to_le16(temp);
|
|
}
|
|
|
|
#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
|
|
|
|
static int check_reset_complete(struct isp1760_hcd *priv, int index,
|
|
u32 __iomem *status_reg, int port_status)
|
|
{
|
|
if (!(port_status & PORT_CONNECT))
|
|
return port_status;
|
|
|
|
/* if reset finished and it's still not enabled -- handoff */
|
|
if (!(port_status & PORT_PE)) {
|
|
|
|
printk(KERN_ERR "port %d full speed --> companion\n",
|
|
index + 1);
|
|
|
|
port_status |= PORT_OWNER;
|
|
port_status &= ~PORT_RWC_BITS;
|
|
isp1760_writel(port_status, status_reg);
|
|
|
|
} else
|
|
printk(KERN_ERR "port %d high speed\n", index + 1);
|
|
|
|
return port_status;
|
|
}
|
|
|
|
static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
|
|
u16 wValue, u16 wIndex, char *buf, u16 wLength)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int ports = HCS_N_PORTS(priv->hcs_params);
|
|
u32 __iomem *status_reg = hcd->regs + HC_PORTSC1;
|
|
u32 temp, status;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
unsigned selector;
|
|
|
|
/*
|
|
* FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
|
|
* HCS_INDICATOR may say we can change LEDs to off/amber/green.
|
|
* (track current state ourselves) ... blink for diagnostics,
|
|
* power, "this is the one", etc. EHCI spec supports this.
|
|
*/
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
switch (typeReq) {
|
|
case ClearHubFeature:
|
|
switch (wValue) {
|
|
case C_HUB_LOCAL_POWER:
|
|
case C_HUB_OVER_CURRENT:
|
|
/* no hub-wide feature/status flags */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
break;
|
|
case ClearPortFeature:
|
|
if (!wIndex || wIndex > ports)
|
|
goto error;
|
|
wIndex--;
|
|
temp = isp1760_readl(status_reg);
|
|
|
|
/*
|
|
* Even if OWNER is set, so the port is owned by the
|
|
* companion controller, khubd needs to be able to clear
|
|
* the port-change status bits (especially
|
|
* USB_PORT_FEAT_C_CONNECTION).
|
|
*/
|
|
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_ENABLE:
|
|
isp1760_writel(temp & ~PORT_PE, status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_C_ENABLE:
|
|
/* XXX error? */
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if (temp & PORT_RESET)
|
|
goto error;
|
|
|
|
if (temp & PORT_SUSPEND) {
|
|
if ((temp & PORT_PE) == 0)
|
|
goto error;
|
|
/* resume signaling for 20 msec */
|
|
temp &= ~(PORT_RWC_BITS);
|
|
isp1760_writel(temp | PORT_RESUME,
|
|
status_reg);
|
|
priv->reset_done = jiffies +
|
|
msecs_to_jiffies(20);
|
|
}
|
|
break;
|
|
case USB_PORT_FEAT_C_SUSPEND:
|
|
/* we auto-clear this feature */
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (HCS_PPC(priv->hcs_params))
|
|
isp1760_writel(temp & ~PORT_POWER, status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_C_CONNECTION:
|
|
isp1760_writel(temp | PORT_CSC,
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
/* XXX error ?*/
|
|
break;
|
|
case USB_PORT_FEAT_C_RESET:
|
|
/* GetPortStatus clears reset */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
isp1760_readl(hcd->regs + HC_USBCMD);
|
|
break;
|
|
case GetHubDescriptor:
|
|
isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
|
|
buf);
|
|
break;
|
|
case GetHubStatus:
|
|
/* no hub-wide feature/status flags */
|
|
memset(buf, 0, 4);
|
|
break;
|
|
case GetPortStatus:
|
|
if (!wIndex || wIndex > ports)
|
|
goto error;
|
|
wIndex--;
|
|
status = 0;
|
|
temp = isp1760_readl(status_reg);
|
|
|
|
/* wPortChange bits */
|
|
if (temp & PORT_CSC)
|
|
status |= 1 << USB_PORT_FEAT_C_CONNECTION;
|
|
|
|
|
|
/* whoever resumes must GetPortStatus to complete it!! */
|
|
if (temp & PORT_RESUME) {
|
|
printk(KERN_ERR "Port resume should be skipped.\n");
|
|
|
|
/* Remote Wakeup received? */
|
|
if (!priv->reset_done) {
|
|
/* resume signaling for 20 msec */
|
|
priv->reset_done = jiffies
|
|
+ msecs_to_jiffies(20);
|
|
/* check the port again */
|
|
mod_timer(&priv_to_hcd(priv)->rh_timer,
|
|
priv->reset_done);
|
|
}
|
|
|
|
/* resume completed? */
|
|
else if (time_after_eq(jiffies,
|
|
priv->reset_done)) {
|
|
status |= 1 << USB_PORT_FEAT_C_SUSPEND;
|
|
priv->reset_done = 0;
|
|
|
|
/* stop resume signaling */
|
|
temp = isp1760_readl(status_reg);
|
|
isp1760_writel(
|
|
temp & ~(PORT_RWC_BITS | PORT_RESUME),
|
|
status_reg);
|
|
retval = handshake(priv, status_reg,
|
|
PORT_RESUME, 0, 2000 /* 2msec */);
|
|
if (retval != 0) {
|
|
isp1760_err(priv,
|
|
"port %d resume error %d\n",
|
|
wIndex + 1, retval);
|
|
goto error;
|
|
}
|
|
temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
|
|
}
|
|
}
|
|
|
|
/* whoever resets must GetPortStatus to complete it!! */
|
|
if ((temp & PORT_RESET)
|
|
&& time_after_eq(jiffies,
|
|
priv->reset_done)) {
|
|
status |= 1 << USB_PORT_FEAT_C_RESET;
|
|
priv->reset_done = 0;
|
|
|
|
/* force reset to complete */
|
|
isp1760_writel(temp & ~PORT_RESET,
|
|
status_reg);
|
|
/* REVISIT: some hardware needs 550+ usec to clear
|
|
* this bit; seems too long to spin routinely...
|
|
*/
|
|
retval = handshake(priv, status_reg,
|
|
PORT_RESET, 0, 750);
|
|
if (retval != 0) {
|
|
isp1760_err(priv, "port %d reset error %d\n",
|
|
wIndex + 1, retval);
|
|
goto error;
|
|
}
|
|
|
|
/* see what we found out */
|
|
temp = check_reset_complete(priv, wIndex, status_reg,
|
|
isp1760_readl(status_reg));
|
|
}
|
|
/*
|
|
* Even if OWNER is set, there's no harm letting khubd
|
|
* see the wPortStatus values (they should all be 0 except
|
|
* for PORT_POWER anyway).
|
|
*/
|
|
|
|
if (temp & PORT_OWNER)
|
|
printk(KERN_ERR "Warning: PORT_OWNER is set\n");
|
|
|
|
if (temp & PORT_CONNECT) {
|
|
status |= 1 << USB_PORT_FEAT_CONNECTION;
|
|
/* status may be from integrated TT */
|
|
status |= ehci_port_speed(priv, temp);
|
|
}
|
|
if (temp & PORT_PE)
|
|
status |= 1 << USB_PORT_FEAT_ENABLE;
|
|
if (temp & (PORT_SUSPEND|PORT_RESUME))
|
|
status |= 1 << USB_PORT_FEAT_SUSPEND;
|
|
if (temp & PORT_RESET)
|
|
status |= 1 << USB_PORT_FEAT_RESET;
|
|
if (temp & PORT_POWER)
|
|
status |= 1 << USB_PORT_FEAT_POWER;
|
|
|
|
put_unaligned(cpu_to_le32(status), (__le32 *) buf);
|
|
break;
|
|
case SetHubFeature:
|
|
switch (wValue) {
|
|
case C_HUB_LOCAL_POWER:
|
|
case C_HUB_OVER_CURRENT:
|
|
/* no hub-wide feature/status flags */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
break;
|
|
case SetPortFeature:
|
|
selector = wIndex >> 8;
|
|
wIndex &= 0xff;
|
|
if (!wIndex || wIndex > ports)
|
|
goto error;
|
|
wIndex--;
|
|
temp = isp1760_readl(status_reg);
|
|
if (temp & PORT_OWNER)
|
|
break;
|
|
|
|
/* temp &= ~PORT_RWC_BITS; */
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_ENABLE:
|
|
isp1760_writel(temp | PORT_PE, status_reg);
|
|
break;
|
|
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if ((temp & PORT_PE) == 0
|
|
|| (temp & PORT_RESET) != 0)
|
|
goto error;
|
|
|
|
isp1760_writel(temp | PORT_SUSPEND, status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (HCS_PPC(priv->hcs_params))
|
|
isp1760_writel(temp | PORT_POWER,
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_RESET:
|
|
if (temp & PORT_RESUME)
|
|
goto error;
|
|
/* line status bits may report this as low speed,
|
|
* which can be fine if this root hub has a
|
|
* transaction translator built in.
|
|
*/
|
|
if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
|
|
&& PORT_USB11(temp)) {
|
|
temp |= PORT_OWNER;
|
|
} else {
|
|
temp |= PORT_RESET;
|
|
temp &= ~PORT_PE;
|
|
|
|
/*
|
|
* caller must wait, then call GetPortStatus
|
|
* usb 2.0 spec says 50 ms resets on root
|
|
*/
|
|
priv->reset_done = jiffies +
|
|
msecs_to_jiffies(50);
|
|
}
|
|
isp1760_writel(temp, status_reg);
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
isp1760_readl(hcd->regs + HC_USBCMD);
|
|
break;
|
|
|
|
default:
|
|
error:
|
|
/* "stall" on error */
|
|
retval = -EPIPE;
|
|
}
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
|
|
struct isp1760_qh *qh;
|
|
struct isp1760_qtd *qtd;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
qh = ep->hcpriv;
|
|
if (!qh)
|
|
goto out;
|
|
|
|
ep->hcpriv = NULL;
|
|
do {
|
|
/* more than entry might get removed */
|
|
if (list_empty(&qh->qtd_list))
|
|
break;
|
|
|
|
qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
|
|
qtd_list);
|
|
|
|
if (qtd->status & URB_ENQUEUED) {
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
} else {
|
|
struct urb *urb;
|
|
|
|
urb = qtd->urb;
|
|
clean_up_qtdlist(qtd);
|
|
isp1760_urb_done(priv, urb, -ECONNRESET);
|
|
}
|
|
} while (1);
|
|
|
|
qh_destroy(qh);
|
|
/* remove requests and leak them.
|
|
* ATL are pretty fast done, INT could take a while...
|
|
* The latter shoule be removed
|
|
*/
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static int isp1760_get_frame(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 fr;
|
|
|
|
fr = isp1760_readl(hcd->regs + HC_FRINDEX);
|
|
return (fr >> 3) % priv->periodic_size;
|
|
}
|
|
|
|
static void isp1760_stop(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 temp;
|
|
|
|
isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
|
|
NULL, 0);
|
|
mdelay(20);
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
ehci_reset(priv);
|
|
/* Disable IRQ */
|
|
temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
|
|
isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
|
|
}
|
|
|
|
static void isp1760_shutdown(struct usb_hcd *hcd)
|
|
{
|
|
u32 command, temp;
|
|
|
|
isp1760_stop(hcd);
|
|
temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
|
|
isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
|
|
|
|
command = isp1760_readl(hcd->regs + HC_USBCMD);
|
|
command &= ~CMD_RUN;
|
|
isp1760_writel(command, hcd->regs + HC_USBCMD);
|
|
}
|
|
|
|
static const struct hc_driver isp1760_hc_driver = {
|
|
.description = "isp1760-hcd",
|
|
.product_desc = "NXP ISP1760 USB Host Controller",
|
|
.hcd_priv_size = sizeof(struct isp1760_hcd),
|
|
.irq = isp1760_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
.reset = isp1760_hc_setup,
|
|
.start = isp1760_run,
|
|
.stop = isp1760_stop,
|
|
.shutdown = isp1760_shutdown,
|
|
.urb_enqueue = isp1760_urb_enqueue,
|
|
.urb_dequeue = isp1760_urb_dequeue,
|
|
.endpoint_disable = isp1760_endpoint_disable,
|
|
.get_frame_number = isp1760_get_frame,
|
|
.hub_status_data = isp1760_hub_status_data,
|
|
.hub_control = isp1760_hub_control,
|
|
};
|
|
|
|
int __init init_kmem_once(void)
|
|
{
|
|
qtd_cachep = kmem_cache_create("isp1760_qtd",
|
|
sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
|
|
SLAB_MEM_SPREAD, NULL);
|
|
|
|
if (!qtd_cachep)
|
|
return -ENOMEM;
|
|
|
|
qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
|
|
0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
|
|
|
|
if (!qh_cachep) {
|
|
kmem_cache_destroy(qtd_cachep);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void deinit_kmem_cache(void)
|
|
{
|
|
kmem_cache_destroy(qtd_cachep);
|
|
kmem_cache_destroy(qh_cachep);
|
|
}
|
|
|
|
struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
|
|
int irq, unsigned long irqflags,
|
|
struct device *dev, const char *busname,
|
|
unsigned int devflags)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct isp1760_hcd *priv;
|
|
int ret;
|
|
|
|
if (usb_disabled())
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
/* prevent usb-core allocating DMA pages */
|
|
dev->dma_mask = NULL;
|
|
|
|
hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
|
|
if (!hcd)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
priv = hcd_to_priv(hcd);
|
|
priv->devflags = devflags;
|
|
init_memory(priv);
|
|
hcd->regs = ioremap(res_start, res_len);
|
|
if (!hcd->regs) {
|
|
ret = -EIO;
|
|
goto err_put;
|
|
}
|
|
|
|
hcd->irq = irq;
|
|
hcd->rsrc_start = res_start;
|
|
hcd->rsrc_len = res_len;
|
|
|
|
ret = usb_add_hcd(hcd, irq, irqflags);
|
|
if (ret)
|
|
goto err_unmap;
|
|
|
|
return hcd;
|
|
|
|
err_unmap:
|
|
iounmap(hcd->regs);
|
|
|
|
err_put:
|
|
usb_put_hcd(hcd);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
|
|
MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
|
|
MODULE_LICENSE("GPL v2");
|