3a7655fcb2
Properly triggering the reset wire is necessary with the ISP1761 used on Terasic DE4 Altera-FPGA boards using a NIOS2 processor, for example. This is an optional implementation for the OF binding only. The other bindings just pass an invalid GPIO to the isp1760_register() routine. Example, usage in DTS: gpios = <&pio_isp1761rst_0 0 1>; to point to a GPIO controller from within the ISP1761 node: GPIO 0, active low. Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2274 lines
58 KiB
C
2274 lines
58 KiB
C
/*
|
|
* Driver for the NXP ISP1760 chip
|
|
*
|
|
* However, the code might contain some bugs. What doesn't work for sure is:
|
|
* - ISO
|
|
* - OTG
|
|
e The interrupt line is configured as active low, level.
|
|
*
|
|
* (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
|
|
*
|
|
* (c) 2011 Arvid Brodin <arvid.brodin@enea.com>
|
|
*
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/list.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/hcd.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/io.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/timer.h>
|
|
#include <asm/unaligned.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <linux/gpio.h>
|
|
|
|
#include "isp1760-hcd.h"
|
|
|
|
static struct kmem_cache *qtd_cachep;
|
|
static struct kmem_cache *qh_cachep;
|
|
static struct kmem_cache *urb_listitem_cachep;
|
|
|
|
struct isp1760_hcd {
|
|
u32 hcs_params;
|
|
spinlock_t lock;
|
|
struct slotinfo atl_slots[32];
|
|
int atl_done_map;
|
|
struct slotinfo int_slots[32];
|
|
int int_done_map;
|
|
struct memory_chunk memory_pool[BLOCKS];
|
|
struct list_head controlqhs, bulkqhs, interruptqhs;
|
|
|
|
/* periodic schedule support */
|
|
#define DEFAULT_I_TDPS 1024
|
|
unsigned periodic_size;
|
|
unsigned i_thresh;
|
|
unsigned long reset_done;
|
|
unsigned long next_statechange;
|
|
unsigned int devflags;
|
|
|
|
int rst_gpio;
|
|
};
|
|
|
|
static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
|
|
{
|
|
return (struct isp1760_hcd *) (hcd->hcd_priv);
|
|
}
|
|
|
|
/* Section 2.2 Host Controller Capability Registers */
|
|
#define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
|
|
#define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
|
|
#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
|
|
#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
|
|
#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
|
|
#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
|
|
#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
|
|
|
|
/* Section 2.3 Host Controller Operational Registers */
|
|
#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
|
|
#define CMD_RESET (1<<1) /* reset HC not bus */
|
|
#define CMD_RUN (1<<0) /* start/stop HC */
|
|
#define STS_PCD (1<<2) /* port change detect */
|
|
#define FLAG_CF (1<<0) /* true: we'll support "high speed" */
|
|
|
|
#define PORT_OWNER (1<<13) /* true: companion hc owns this port */
|
|
#define PORT_POWER (1<<12) /* true: has power (see PPC) */
|
|
#define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */
|
|
#define PORT_RESET (1<<8) /* reset port */
|
|
#define PORT_SUSPEND (1<<7) /* suspend port */
|
|
#define PORT_RESUME (1<<6) /* resume it */
|
|
#define PORT_PE (1<<2) /* port enable */
|
|
#define PORT_CSC (1<<1) /* connect status change */
|
|
#define PORT_CONNECT (1<<0) /* device connected */
|
|
#define PORT_RWC_BITS (PORT_CSC)
|
|
|
|
struct isp1760_qtd {
|
|
u8 packet_type;
|
|
void *data_buffer;
|
|
u32 payload_addr;
|
|
|
|
/* the rest is HCD-private */
|
|
struct list_head qtd_list;
|
|
struct urb *urb;
|
|
size_t length;
|
|
size_t actual_length;
|
|
|
|
/* QTD_ENQUEUED: waiting for transfer (inactive) */
|
|
/* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */
|
|
/* QTD_XFER_STARTED: valid ptd has been written to isp176x - only
|
|
interrupt handler may touch this qtd! */
|
|
/* QTD_XFER_COMPLETE: payload has been transferred successfully */
|
|
/* QTD_RETIRE: transfer error/abort qtd */
|
|
#define QTD_ENQUEUED 0
|
|
#define QTD_PAYLOAD_ALLOC 1
|
|
#define QTD_XFER_STARTED 2
|
|
#define QTD_XFER_COMPLETE 3
|
|
#define QTD_RETIRE 4
|
|
u32 status;
|
|
};
|
|
|
|
/* Queue head, one for each active endpoint */
|
|
struct isp1760_qh {
|
|
struct list_head qh_list;
|
|
struct list_head qtd_list;
|
|
u32 toggle;
|
|
u32 ping;
|
|
int slot;
|
|
int tt_buffer_dirty; /* See USB2.0 spec section 11.17.5 */
|
|
};
|
|
|
|
struct urb_listitem {
|
|
struct list_head urb_list;
|
|
struct urb *urb;
|
|
};
|
|
|
|
/*
|
|
* Access functions for isp176x registers (addresses 0..0x03FF).
|
|
*/
|
|
static u32 reg_read32(void __iomem *base, u32 reg)
|
|
{
|
|
return readl(base + reg);
|
|
}
|
|
|
|
static void reg_write32(void __iomem *base, u32 reg, u32 val)
|
|
{
|
|
writel(val, base + reg);
|
|
}
|
|
|
|
/*
|
|
* Access functions for isp176x memory (offset >= 0x0400).
|
|
*
|
|
* bank_reads8() reads memory locations prefetched by an earlier write to
|
|
* HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi-
|
|
* bank optimizations, you should use the more generic mem_reads8() below.
|
|
*
|
|
* For access to ptd memory, use the specialized ptd_read() and ptd_write()
|
|
* below.
|
|
*
|
|
* These functions copy via MMIO data to/from the device. memcpy_{to|from}io()
|
|
* doesn't quite work because some people have to enforce 32-bit access
|
|
*/
|
|
static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr,
|
|
__u32 *dst, u32 bytes)
|
|
{
|
|
__u32 __iomem *src;
|
|
u32 val;
|
|
__u8 *src_byteptr;
|
|
__u8 *dst_byteptr;
|
|
|
|
src = src_base + (bank_addr | src_offset);
|
|
|
|
if (src_offset < PAYLOAD_OFFSET) {
|
|
while (bytes >= 4) {
|
|
*dst = le32_to_cpu(__raw_readl(src));
|
|
bytes -= 4;
|
|
src++;
|
|
dst++;
|
|
}
|
|
} else {
|
|
while (bytes >= 4) {
|
|
*dst = __raw_readl(src);
|
|
bytes -= 4;
|
|
src++;
|
|
dst++;
|
|
}
|
|
}
|
|
|
|
if (!bytes)
|
|
return;
|
|
|
|
/* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
|
|
* allocated.
|
|
*/
|
|
if (src_offset < PAYLOAD_OFFSET)
|
|
val = le32_to_cpu(__raw_readl(src));
|
|
else
|
|
val = __raw_readl(src);
|
|
|
|
dst_byteptr = (void *) dst;
|
|
src_byteptr = (void *) &val;
|
|
while (bytes > 0) {
|
|
*dst_byteptr = *src_byteptr;
|
|
dst_byteptr++;
|
|
src_byteptr++;
|
|
bytes--;
|
|
}
|
|
}
|
|
|
|
static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst,
|
|
u32 bytes)
|
|
{
|
|
reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0));
|
|
ndelay(90);
|
|
bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes);
|
|
}
|
|
|
|
static void mem_writes8(void __iomem *dst_base, u32 dst_offset,
|
|
__u32 const *src, u32 bytes)
|
|
{
|
|
__u32 __iomem *dst;
|
|
|
|
dst = dst_base + dst_offset;
|
|
|
|
if (dst_offset < PAYLOAD_OFFSET) {
|
|
while (bytes >= 4) {
|
|
__raw_writel(cpu_to_le32(*src), dst);
|
|
bytes -= 4;
|
|
src++;
|
|
dst++;
|
|
}
|
|
} else {
|
|
while (bytes >= 4) {
|
|
__raw_writel(*src, dst);
|
|
bytes -= 4;
|
|
src++;
|
|
dst++;
|
|
}
|
|
}
|
|
|
|
if (!bytes)
|
|
return;
|
|
/* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the
|
|
* extra bytes should not be read by the HW.
|
|
*/
|
|
|
|
if (dst_offset < PAYLOAD_OFFSET)
|
|
__raw_writel(cpu_to_le32(*src), dst);
|
|
else
|
|
__raw_writel(*src, dst);
|
|
}
|
|
|
|
/*
|
|
* Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET,
|
|
* INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32.
|
|
*/
|
|
static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot,
|
|
struct ptd *ptd)
|
|
{
|
|
reg_write32(base, HC_MEMORY_REG,
|
|
ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd));
|
|
ndelay(90);
|
|
bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0),
|
|
(void *) ptd, sizeof(*ptd));
|
|
}
|
|
|
|
static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot,
|
|
struct ptd *ptd)
|
|
{
|
|
mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0),
|
|
&ptd->dw1, 7*sizeof(ptd->dw1));
|
|
/* Make sure dw0 gets written last (after other dw's and after payload)
|
|
since it contains the enable bit */
|
|
wmb();
|
|
mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0,
|
|
sizeof(ptd->dw0));
|
|
}
|
|
|
|
|
|
/* memory management of the 60kb on the chip from 0x1000 to 0xffff */
|
|
static void init_memory(struct isp1760_hcd *priv)
|
|
{
|
|
int i, curr;
|
|
u32 payload_addr;
|
|
|
|
payload_addr = PAYLOAD_OFFSET;
|
|
for (i = 0; i < BLOCK_1_NUM; i++) {
|
|
priv->memory_pool[i].start = payload_addr;
|
|
priv->memory_pool[i].size = BLOCK_1_SIZE;
|
|
priv->memory_pool[i].free = 1;
|
|
payload_addr += priv->memory_pool[i].size;
|
|
}
|
|
|
|
curr = i;
|
|
for (i = 0; i < BLOCK_2_NUM; i++) {
|
|
priv->memory_pool[curr + i].start = payload_addr;
|
|
priv->memory_pool[curr + i].size = BLOCK_2_SIZE;
|
|
priv->memory_pool[curr + i].free = 1;
|
|
payload_addr += priv->memory_pool[curr + i].size;
|
|
}
|
|
|
|
curr = i;
|
|
for (i = 0; i < BLOCK_3_NUM; i++) {
|
|
priv->memory_pool[curr + i].start = payload_addr;
|
|
priv->memory_pool[curr + i].size = BLOCK_3_SIZE;
|
|
priv->memory_pool[curr + i].free = 1;
|
|
payload_addr += priv->memory_pool[curr + i].size;
|
|
}
|
|
|
|
WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE);
|
|
}
|
|
|
|
static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int i;
|
|
|
|
WARN_ON(qtd->payload_addr);
|
|
|
|
if (!qtd->length)
|
|
return;
|
|
|
|
for (i = 0; i < BLOCKS; i++) {
|
|
if (priv->memory_pool[i].size >= qtd->length &&
|
|
priv->memory_pool[i].free) {
|
|
priv->memory_pool[i].free = 0;
|
|
qtd->payload_addr = priv->memory_pool[i].start;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int i;
|
|
|
|
if (!qtd->payload_addr)
|
|
return;
|
|
|
|
for (i = 0; i < BLOCKS; i++) {
|
|
if (priv->memory_pool[i].start == qtd->payload_addr) {
|
|
WARN_ON(priv->memory_pool[i].free);
|
|
priv->memory_pool[i].free = 1;
|
|
qtd->payload_addr = 0;
|
|
return;
|
|
}
|
|
}
|
|
|
|
dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n",
|
|
__func__, qtd->payload_addr);
|
|
WARN_ON(1);
|
|
qtd->payload_addr = 0;
|
|
}
|
|
|
|
static int handshake(struct usb_hcd *hcd, u32 reg,
|
|
u32 mask, u32 done, int usec)
|
|
{
|
|
u32 result;
|
|
|
|
do {
|
|
result = reg_read32(hcd->regs, reg);
|
|
if (result == ~0)
|
|
return -ENODEV;
|
|
result &= mask;
|
|
if (result == done)
|
|
return 0;
|
|
udelay(1);
|
|
usec--;
|
|
} while (usec > 0);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* reset a non-running (STS_HALT == 1) controller */
|
|
static int ehci_reset(struct usb_hcd *hcd)
|
|
{
|
|
int retval;
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
|
|
u32 command = reg_read32(hcd->regs, HC_USBCMD);
|
|
|
|
command |= CMD_RESET;
|
|
reg_write32(hcd->regs, HC_USBCMD, command);
|
|
hcd->state = HC_STATE_HALT;
|
|
priv->next_statechange = jiffies;
|
|
retval = handshake(hcd, HC_USBCMD,
|
|
CMD_RESET, 0, 250 * 1000);
|
|
return retval;
|
|
}
|
|
|
|
static struct isp1760_qh *qh_alloc(gfp_t flags)
|
|
{
|
|
struct isp1760_qh *qh;
|
|
|
|
qh = kmem_cache_zalloc(qh_cachep, flags);
|
|
if (!qh)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&qh->qh_list);
|
|
INIT_LIST_HEAD(&qh->qtd_list);
|
|
qh->slot = -1;
|
|
|
|
return qh;
|
|
}
|
|
|
|
static void qh_free(struct isp1760_qh *qh)
|
|
{
|
|
WARN_ON(!list_empty(&qh->qtd_list));
|
|
WARN_ON(qh->slot > -1);
|
|
kmem_cache_free(qh_cachep, qh);
|
|
}
|
|
|
|
/* one-time init, only for memory state */
|
|
static int priv_init(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 hcc_params;
|
|
|
|
spin_lock_init(&priv->lock);
|
|
|
|
INIT_LIST_HEAD(&priv->interruptqhs);
|
|
INIT_LIST_HEAD(&priv->controlqhs);
|
|
INIT_LIST_HEAD(&priv->bulkqhs);
|
|
|
|
/*
|
|
* hw default: 1K periodic list heads, one per frame.
|
|
* periodic_size can shrink by USBCMD update if hcc_params allows.
|
|
*/
|
|
priv->periodic_size = DEFAULT_I_TDPS;
|
|
|
|
/* controllers may cache some of the periodic schedule ... */
|
|
hcc_params = reg_read32(hcd->regs, HC_HCCPARAMS);
|
|
/* full frame cache */
|
|
if (HCC_ISOC_CACHE(hcc_params))
|
|
priv->i_thresh = 8;
|
|
else /* N microframes cached */
|
|
priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int isp1760_hc_setup(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int result;
|
|
u32 scratch, hwmode;
|
|
|
|
/* low-level chip reset */
|
|
if (gpio_is_valid(priv->rst_gpio)) {
|
|
unsigned int rst_lvl;
|
|
|
|
rst_lvl = (priv->devflags &
|
|
ISP1760_FLAG_RESET_ACTIVE_HIGH) ? 1 : 0;
|
|
|
|
gpio_set_value(priv->rst_gpio, rst_lvl);
|
|
mdelay(50);
|
|
gpio_set_value(priv->rst_gpio, !rst_lvl);
|
|
}
|
|
|
|
/* Setup HW Mode Control: This assumes a level active-low interrupt */
|
|
hwmode = HW_DATA_BUS_32BIT;
|
|
|
|
if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
|
|
hwmode &= ~HW_DATA_BUS_32BIT;
|
|
if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
|
|
hwmode |= HW_ANA_DIGI_OC;
|
|
if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
|
|
hwmode |= HW_DACK_POL_HIGH;
|
|
if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
|
|
hwmode |= HW_DREQ_POL_HIGH;
|
|
if (priv->devflags & ISP1760_FLAG_INTR_POL_HIGH)
|
|
hwmode |= HW_INTR_HIGH_ACT;
|
|
if (priv->devflags & ISP1760_FLAG_INTR_EDGE_TRIG)
|
|
hwmode |= HW_INTR_EDGE_TRIG;
|
|
|
|
/*
|
|
* We have to set this first in case we're in 16-bit mode.
|
|
* Write it twice to ensure correct upper bits if switching
|
|
* to 16-bit mode.
|
|
*/
|
|
reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
|
|
reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
|
|
|
|
reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe);
|
|
/* Change bus pattern */
|
|
scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG);
|
|
scratch = reg_read32(hcd->regs, HC_SCRATCH_REG);
|
|
if (scratch != 0xdeadbabe) {
|
|
dev_err(hcd->self.controller, "Scratch test failed.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* pre reset */
|
|
reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0);
|
|
reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
|
|
reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
|
|
reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
|
|
|
|
/* reset */
|
|
reg_write32(hcd->regs, HC_RESET_REG, SW_RESET_RESET_ALL);
|
|
mdelay(100);
|
|
|
|
reg_write32(hcd->regs, HC_RESET_REG, SW_RESET_RESET_HC);
|
|
mdelay(100);
|
|
|
|
result = ehci_reset(hcd);
|
|
if (result)
|
|
return result;
|
|
|
|
/* Step 11 passed */
|
|
|
|
dev_info(hcd->self.controller, "bus width: %d, oc: %s\n",
|
|
(priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
|
|
16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
|
|
"analog" : "digital");
|
|
|
|
/* ATL reset */
|
|
reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET);
|
|
mdelay(10);
|
|
reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
|
|
|
|
reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK);
|
|
|
|
/*
|
|
* PORT 1 Control register of the ISP1760 is the OTG control
|
|
* register on ISP1761. Since there is no OTG or device controller
|
|
* support in this driver, we use port 1 as a "normal" USB host port on
|
|
* both chips.
|
|
*/
|
|
reg_write32(hcd->regs, HC_PORT1_CTRL, PORT1_POWER | PORT1_INIT2);
|
|
mdelay(10);
|
|
|
|
priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS);
|
|
|
|
return priv_init(hcd);
|
|
}
|
|
|
|
static u32 base_to_chip(u32 base)
|
|
{
|
|
return ((base - 0x400) >> 3);
|
|
}
|
|
|
|
static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh)
|
|
{
|
|
struct urb *urb;
|
|
|
|
if (list_is_last(&qtd->qtd_list, &qh->qtd_list))
|
|
return 1;
|
|
|
|
urb = qtd->urb;
|
|
qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list);
|
|
return (qtd->urb != urb);
|
|
}
|
|
|
|
/* magic numbers that can affect system performance */
|
|
#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
|
|
#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
|
|
#define EHCI_TUNE_RL_TT 0
|
|
#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
|
|
#define EHCI_TUNE_MULT_TT 1
|
|
#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
|
|
|
|
static void create_ptd_atl(struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd, struct ptd *ptd)
|
|
{
|
|
u32 maxpacket;
|
|
u32 multi;
|
|
u32 rl = RL_COUNTER;
|
|
u32 nak = NAK_COUNTER;
|
|
|
|
memset(ptd, 0, sizeof(*ptd));
|
|
|
|
/* according to 3.6.2, max packet len can not be > 0x400 */
|
|
maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe,
|
|
usb_pipeout(qtd->urb->pipe));
|
|
multi = 1 + ((maxpacket >> 11) & 0x3);
|
|
maxpacket &= 0x7ff;
|
|
|
|
/* DW0 */
|
|
ptd->dw0 = DW0_VALID_BIT;
|
|
ptd->dw0 |= TO_DW0_LENGTH(qtd->length);
|
|
ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket);
|
|
ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe));
|
|
|
|
/* DW1 */
|
|
ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1;
|
|
ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe));
|
|
ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type);
|
|
|
|
if (usb_pipebulk(qtd->urb->pipe))
|
|
ptd->dw1 |= DW1_TRANS_BULK;
|
|
else if (usb_pipeint(qtd->urb->pipe))
|
|
ptd->dw1 |= DW1_TRANS_INT;
|
|
|
|
if (qtd->urb->dev->speed != USB_SPEED_HIGH) {
|
|
/* split transaction */
|
|
|
|
ptd->dw1 |= DW1_TRANS_SPLIT;
|
|
if (qtd->urb->dev->speed == USB_SPEED_LOW)
|
|
ptd->dw1 |= DW1_SE_USB_LOSPEED;
|
|
|
|
ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport);
|
|
ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum);
|
|
|
|
/* SE bit for Split INT transfers */
|
|
if (usb_pipeint(qtd->urb->pipe) &&
|
|
(qtd->urb->dev->speed == USB_SPEED_LOW))
|
|
ptd->dw1 |= 2 << 16;
|
|
|
|
rl = 0;
|
|
nak = 0;
|
|
} else {
|
|
ptd->dw0 |= TO_DW0_MULTI(multi);
|
|
if (usb_pipecontrol(qtd->urb->pipe) ||
|
|
usb_pipebulk(qtd->urb->pipe))
|
|
ptd->dw3 |= TO_DW3_PING(qh->ping);
|
|
}
|
|
/* DW2 */
|
|
ptd->dw2 = 0;
|
|
ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr));
|
|
ptd->dw2 |= TO_DW2_RL(rl);
|
|
|
|
/* DW3 */
|
|
ptd->dw3 |= TO_DW3_NAKCOUNT(nak);
|
|
ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle);
|
|
if (usb_pipecontrol(qtd->urb->pipe)) {
|
|
if (qtd->data_buffer == qtd->urb->setup_packet)
|
|
ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1);
|
|
else if (last_qtd_of_urb(qtd, qh))
|
|
ptd->dw3 |= TO_DW3_DATA_TOGGLE(1);
|
|
}
|
|
|
|
ptd->dw3 |= DW3_ACTIVE_BIT;
|
|
/* Cerr */
|
|
ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER);
|
|
}
|
|
|
|
static void transform_add_int(struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd, struct ptd *ptd)
|
|
{
|
|
u32 usof;
|
|
u32 period;
|
|
|
|
/*
|
|
* Most of this is guessing. ISP1761 datasheet is quite unclear, and
|
|
* the algorithm from the original Philips driver code, which was
|
|
* pretty much used in this driver before as well, is quite horrendous
|
|
* and, i believe, incorrect. The code below follows the datasheet and
|
|
* USB2.0 spec as far as I can tell, and plug/unplug seems to be much
|
|
* more reliable this way (fingers crossed...).
|
|
*/
|
|
|
|
if (qtd->urb->dev->speed == USB_SPEED_HIGH) {
|
|
/* urb->interval is in units of microframes (1/8 ms) */
|
|
period = qtd->urb->interval >> 3;
|
|
|
|
if (qtd->urb->interval > 4)
|
|
usof = 0x01; /* One bit set =>
|
|
interval 1 ms * uFrame-match */
|
|
else if (qtd->urb->interval > 2)
|
|
usof = 0x22; /* Two bits set => interval 1/2 ms */
|
|
else if (qtd->urb->interval > 1)
|
|
usof = 0x55; /* Four bits set => interval 1/4 ms */
|
|
else
|
|
usof = 0xff; /* All bits set => interval 1/8 ms */
|
|
} else {
|
|
/* urb->interval is in units of frames (1 ms) */
|
|
period = qtd->urb->interval;
|
|
usof = 0x0f; /* Execute Start Split on any of the
|
|
four first uFrames */
|
|
|
|
/*
|
|
* First 8 bits in dw5 is uSCS and "specifies which uSOF the
|
|
* complete split needs to be sent. Valid only for IN." Also,
|
|
* "All bits can be set to one for every transfer." (p 82,
|
|
* ISP1761 data sheet.) 0x1c is from Philips driver. Where did
|
|
* that number come from? 0xff seems to work fine...
|
|
*/
|
|
/* ptd->dw5 = 0x1c; */
|
|
ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */
|
|
}
|
|
|
|
period = period >> 1;/* Ensure equal or shorter period than requested */
|
|
period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */
|
|
|
|
ptd->dw2 |= period;
|
|
ptd->dw4 = usof;
|
|
}
|
|
|
|
static void create_ptd_int(struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd, struct ptd *ptd)
|
|
{
|
|
create_ptd_atl(qh, qtd, ptd);
|
|
transform_add_int(qh, qtd, ptd);
|
|
}
|
|
|
|
static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb)
|
|
__releases(priv->lock)
|
|
__acquires(priv->lock)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
|
|
if (!urb->unlinked) {
|
|
if (urb->status == -EINPROGRESS)
|
|
urb->status = 0;
|
|
}
|
|
|
|
if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) {
|
|
void *ptr;
|
|
for (ptr = urb->transfer_buffer;
|
|
ptr < urb->transfer_buffer + urb->transfer_buffer_length;
|
|
ptr += PAGE_SIZE)
|
|
flush_dcache_page(virt_to_page(ptr));
|
|
}
|
|
|
|
/* complete() can reenter this HCD */
|
|
usb_hcd_unlink_urb_from_ep(hcd, urb);
|
|
spin_unlock(&priv->lock);
|
|
usb_hcd_giveback_urb(hcd, urb, urb->status);
|
|
spin_lock(&priv->lock);
|
|
}
|
|
|
|
static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb,
|
|
u8 packet_type)
|
|
{
|
|
struct isp1760_qtd *qtd;
|
|
|
|
qtd = kmem_cache_zalloc(qtd_cachep, flags);
|
|
if (!qtd)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&qtd->qtd_list);
|
|
qtd->urb = urb;
|
|
qtd->packet_type = packet_type;
|
|
qtd->status = QTD_ENQUEUED;
|
|
qtd->actual_length = 0;
|
|
|
|
return qtd;
|
|
}
|
|
|
|
static void qtd_free(struct isp1760_qtd *qtd)
|
|
{
|
|
WARN_ON(qtd->payload_addr);
|
|
kmem_cache_free(qtd_cachep, qtd);
|
|
}
|
|
|
|
static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot,
|
|
struct slotinfo *slots, struct isp1760_qtd *qtd,
|
|
struct isp1760_qh *qh, struct ptd *ptd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int skip_map;
|
|
|
|
WARN_ON((slot < 0) || (slot > 31));
|
|
WARN_ON(qtd->length && !qtd->payload_addr);
|
|
WARN_ON(slots[slot].qtd);
|
|
WARN_ON(slots[slot].qh);
|
|
WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC);
|
|
|
|
/* Make sure done map has not triggered from some unlinked transfer */
|
|
if (ptd_offset == ATL_PTD_OFFSET) {
|
|
priv->atl_done_map |= reg_read32(hcd->regs,
|
|
HC_ATL_PTD_DONEMAP_REG);
|
|
priv->atl_done_map &= ~(1 << slot);
|
|
} else {
|
|
priv->int_done_map |= reg_read32(hcd->regs,
|
|
HC_INT_PTD_DONEMAP_REG);
|
|
priv->int_done_map &= ~(1 << slot);
|
|
}
|
|
|
|
qh->slot = slot;
|
|
qtd->status = QTD_XFER_STARTED;
|
|
slots[slot].timestamp = jiffies;
|
|
slots[slot].qtd = qtd;
|
|
slots[slot].qh = qh;
|
|
ptd_write(hcd->regs, ptd_offset, slot, ptd);
|
|
|
|
if (ptd_offset == ATL_PTD_OFFSET) {
|
|
skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
|
|
skip_map &= ~(1 << qh->slot);
|
|
reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
|
|
} else {
|
|
skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
|
|
skip_map &= ~(1 << qh->slot);
|
|
reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
|
|
}
|
|
}
|
|
|
|
static int is_short_bulk(struct isp1760_qtd *qtd)
|
|
{
|
|
return (usb_pipebulk(qtd->urb->pipe) &&
|
|
(qtd->actual_length < qtd->length));
|
|
}
|
|
|
|
static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh,
|
|
struct list_head *urb_list)
|
|
{
|
|
int last_qtd;
|
|
struct isp1760_qtd *qtd, *qtd_next;
|
|
struct urb_listitem *urb_listitem;
|
|
|
|
list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) {
|
|
if (qtd->status < QTD_XFER_COMPLETE)
|
|
break;
|
|
|
|
last_qtd = last_qtd_of_urb(qtd, qh);
|
|
|
|
if ((!last_qtd) && (qtd->status == QTD_RETIRE))
|
|
qtd_next->status = QTD_RETIRE;
|
|
|
|
if (qtd->status == QTD_XFER_COMPLETE) {
|
|
if (qtd->actual_length) {
|
|
switch (qtd->packet_type) {
|
|
case IN_PID:
|
|
mem_reads8(hcd->regs, qtd->payload_addr,
|
|
qtd->data_buffer,
|
|
qtd->actual_length);
|
|
/* Fall through (?) */
|
|
case OUT_PID:
|
|
qtd->urb->actual_length +=
|
|
qtd->actual_length;
|
|
/* Fall through ... */
|
|
case SETUP_PID:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (is_short_bulk(qtd)) {
|
|
if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK)
|
|
qtd->urb->status = -EREMOTEIO;
|
|
if (!last_qtd)
|
|
qtd_next->status = QTD_RETIRE;
|
|
}
|
|
}
|
|
|
|
if (qtd->payload_addr)
|
|
free_mem(hcd, qtd);
|
|
|
|
if (last_qtd) {
|
|
if ((qtd->status == QTD_RETIRE) &&
|
|
(qtd->urb->status == -EINPROGRESS))
|
|
qtd->urb->status = -EPIPE;
|
|
/* Defer calling of urb_done() since it releases lock */
|
|
urb_listitem = kmem_cache_zalloc(urb_listitem_cachep,
|
|
GFP_ATOMIC);
|
|
if (unlikely(!urb_listitem))
|
|
break; /* Try again on next call */
|
|
urb_listitem->urb = qtd->urb;
|
|
list_add_tail(&urb_listitem->urb_list, urb_list);
|
|
}
|
|
|
|
list_del(&qtd->qtd_list);
|
|
qtd_free(qtd);
|
|
}
|
|
}
|
|
|
|
#define ENQUEUE_DEPTH 2
|
|
static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int ptd_offset;
|
|
struct slotinfo *slots;
|
|
int curr_slot, free_slot;
|
|
int n;
|
|
struct ptd ptd;
|
|
struct isp1760_qtd *qtd;
|
|
|
|
if (unlikely(list_empty(&qh->qtd_list))) {
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
|
|
/* Make sure this endpoint's TT buffer is clean before queueing ptds */
|
|
if (qh->tt_buffer_dirty)
|
|
return;
|
|
|
|
if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd,
|
|
qtd_list)->urb->pipe)) {
|
|
ptd_offset = INT_PTD_OFFSET;
|
|
slots = priv->int_slots;
|
|
} else {
|
|
ptd_offset = ATL_PTD_OFFSET;
|
|
slots = priv->atl_slots;
|
|
}
|
|
|
|
free_slot = -1;
|
|
for (curr_slot = 0; curr_slot < 32; curr_slot++) {
|
|
if ((free_slot == -1) && (slots[curr_slot].qtd == NULL))
|
|
free_slot = curr_slot;
|
|
if (slots[curr_slot].qh == qh)
|
|
break;
|
|
}
|
|
|
|
n = 0;
|
|
list_for_each_entry(qtd, &qh->qtd_list, qtd_list) {
|
|
if (qtd->status == QTD_ENQUEUED) {
|
|
WARN_ON(qtd->payload_addr);
|
|
alloc_mem(hcd, qtd);
|
|
if ((qtd->length) && (!qtd->payload_addr))
|
|
break;
|
|
|
|
if ((qtd->length) &&
|
|
((qtd->packet_type == SETUP_PID) ||
|
|
(qtd->packet_type == OUT_PID))) {
|
|
mem_writes8(hcd->regs, qtd->payload_addr,
|
|
qtd->data_buffer, qtd->length);
|
|
}
|
|
|
|
qtd->status = QTD_PAYLOAD_ALLOC;
|
|
}
|
|
|
|
if (qtd->status == QTD_PAYLOAD_ALLOC) {
|
|
/*
|
|
if ((curr_slot > 31) && (free_slot == -1))
|
|
dev_dbg(hcd->self.controller, "%s: No slot "
|
|
"available for transfer\n", __func__);
|
|
*/
|
|
/* Start xfer for this endpoint if not already done */
|
|
if ((curr_slot > 31) && (free_slot > -1)) {
|
|
if (usb_pipeint(qtd->urb->pipe))
|
|
create_ptd_int(qh, qtd, &ptd);
|
|
else
|
|
create_ptd_atl(qh, qtd, &ptd);
|
|
|
|
start_bus_transfer(hcd, ptd_offset, free_slot,
|
|
slots, qtd, qh, &ptd);
|
|
curr_slot = free_slot;
|
|
}
|
|
|
|
n++;
|
|
if (n >= ENQUEUE_DEPTH)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void schedule_ptds(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv;
|
|
struct isp1760_qh *qh, *qh_next;
|
|
struct list_head *ep_queue;
|
|
struct usb_host_endpoint *ep;
|
|
LIST_HEAD(urb_list);
|
|
struct urb_listitem *urb_listitem, *urb_listitem_next;
|
|
|
|
if (!hcd) {
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
|
|
priv = hcd_to_priv(hcd);
|
|
|
|
/*
|
|
* check finished/retired xfers, transfer payloads, call urb_done()
|
|
*/
|
|
ep_queue = &priv->interruptqhs;
|
|
while (ep_queue) {
|
|
list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) {
|
|
ep = list_entry(qh->qtd_list.next, struct isp1760_qtd,
|
|
qtd_list)->urb->ep;
|
|
collect_qtds(hcd, qh, &urb_list);
|
|
if (list_empty(&qh->qtd_list)) {
|
|
list_del(&qh->qh_list);
|
|
if (ep->hcpriv == NULL) {
|
|
/* Endpoint has been disabled, so we
|
|
can free the associated queue head. */
|
|
qh_free(qh);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ep_queue == &priv->interruptqhs)
|
|
ep_queue = &priv->controlqhs;
|
|
else if (ep_queue == &priv->controlqhs)
|
|
ep_queue = &priv->bulkqhs;
|
|
else
|
|
ep_queue = NULL;
|
|
}
|
|
|
|
list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list,
|
|
urb_list) {
|
|
isp1760_urb_done(hcd, urb_listitem->urb);
|
|
kmem_cache_free(urb_listitem_cachep, urb_listitem);
|
|
}
|
|
|
|
/*
|
|
* Schedule packets for transfer.
|
|
*
|
|
* According to USB2.0 specification:
|
|
*
|
|
* 1st prio: interrupt xfers, up to 80 % of bandwidth
|
|
* 2nd prio: control xfers
|
|
* 3rd prio: bulk xfers
|
|
*
|
|
* ... but let's use a simpler scheme here (mostly because ISP1761 doc
|
|
* is very unclear on how to prioritize traffic):
|
|
*
|
|
* 1) Enqueue any queued control transfers, as long as payload chip mem
|
|
* and PTD ATL slots are available.
|
|
* 2) Enqueue any queued INT transfers, as long as payload chip mem
|
|
* and PTD INT slots are available.
|
|
* 3) Enqueue any queued bulk transfers, as long as payload chip mem
|
|
* and PTD ATL slots are available.
|
|
*
|
|
* Use double buffering (ENQUEUE_DEPTH==2) as a compromise between
|
|
* conservation of chip mem and performance.
|
|
*
|
|
* I'm sure this scheme could be improved upon!
|
|
*/
|
|
ep_queue = &priv->controlqhs;
|
|
while (ep_queue) {
|
|
list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list)
|
|
enqueue_qtds(hcd, qh);
|
|
|
|
if (ep_queue == &priv->controlqhs)
|
|
ep_queue = &priv->interruptqhs;
|
|
else if (ep_queue == &priv->interruptqhs)
|
|
ep_queue = &priv->bulkqhs;
|
|
else
|
|
ep_queue = NULL;
|
|
}
|
|
}
|
|
|
|
#define PTD_STATE_QTD_DONE 1
|
|
#define PTD_STATE_QTD_RELOAD 2
|
|
#define PTD_STATE_URB_RETIRE 3
|
|
|
|
static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd,
|
|
struct urb *urb)
|
|
{
|
|
__dw dw4;
|
|
int i;
|
|
|
|
dw4 = ptd->dw4;
|
|
dw4 >>= 8;
|
|
|
|
/* FIXME: ISP1761 datasheet does not say what to do with these. Do we
|
|
need to handle these errors? Is it done in hardware? */
|
|
|
|
if (ptd->dw3 & DW3_HALT_BIT) {
|
|
|
|
urb->status = -EPROTO; /* Default unknown error */
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
switch (dw4 & 0x7) {
|
|
case INT_UNDERRUN:
|
|
dev_dbg(hcd->self.controller, "%s: underrun "
|
|
"during uFrame %d\n",
|
|
__func__, i);
|
|
urb->status = -ECOMM; /* Could not write data */
|
|
break;
|
|
case INT_EXACT:
|
|
dev_dbg(hcd->self.controller, "%s: transaction "
|
|
"error during uFrame %d\n",
|
|
__func__, i);
|
|
urb->status = -EPROTO; /* timeout, bad CRC, PID
|
|
error etc. */
|
|
break;
|
|
case INT_BABBLE:
|
|
dev_dbg(hcd->self.controller, "%s: babble "
|
|
"error during uFrame %d\n",
|
|
__func__, i);
|
|
urb->status = -EOVERFLOW;
|
|
break;
|
|
}
|
|
dw4 >>= 3;
|
|
}
|
|
|
|
return PTD_STATE_URB_RETIRE;
|
|
}
|
|
|
|
return PTD_STATE_QTD_DONE;
|
|
}
|
|
|
|
static int check_atl_transfer(struct usb_hcd *hcd, struct ptd *ptd,
|
|
struct urb *urb)
|
|
{
|
|
WARN_ON(!ptd);
|
|
if (ptd->dw3 & DW3_HALT_BIT) {
|
|
if (ptd->dw3 & DW3_BABBLE_BIT)
|
|
urb->status = -EOVERFLOW;
|
|
else if (FROM_DW3_CERR(ptd->dw3))
|
|
urb->status = -EPIPE; /* Stall */
|
|
else if (ptd->dw3 & DW3_ERROR_BIT)
|
|
urb->status = -EPROTO; /* XactErr */
|
|
else
|
|
urb->status = -EPROTO; /* Unknown */
|
|
/*
|
|
dev_dbg(hcd->self.controller, "%s: ptd error:\n"
|
|
" dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n"
|
|
" dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n",
|
|
__func__,
|
|
ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3,
|
|
ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7);
|
|
*/
|
|
return PTD_STATE_URB_RETIRE;
|
|
}
|
|
|
|
if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT)) {
|
|
/* Transfer Error, *but* active and no HALT -> reload */
|
|
dev_dbg(hcd->self.controller, "PID error; reloading ptd\n");
|
|
return PTD_STATE_QTD_RELOAD;
|
|
}
|
|
|
|
if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT)) {
|
|
/*
|
|
* NAKs are handled in HW by the chip. Usually if the
|
|
* device is not able to send data fast enough.
|
|
* This happens mostly on slower hardware.
|
|
*/
|
|
return PTD_STATE_QTD_RELOAD;
|
|
}
|
|
|
|
return PTD_STATE_QTD_DONE;
|
|
}
|
|
|
|
static void handle_done_ptds(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
struct ptd ptd;
|
|
struct isp1760_qh *qh;
|
|
int slot;
|
|
int state;
|
|
struct slotinfo *slots;
|
|
u32 ptd_offset;
|
|
struct isp1760_qtd *qtd;
|
|
int modified;
|
|
int skip_map;
|
|
|
|
skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
|
|
priv->int_done_map &= ~skip_map;
|
|
skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
|
|
priv->atl_done_map &= ~skip_map;
|
|
|
|
modified = priv->int_done_map || priv->atl_done_map;
|
|
|
|
while (priv->int_done_map || priv->atl_done_map) {
|
|
if (priv->int_done_map) {
|
|
/* INT ptd */
|
|
slot = __ffs(priv->int_done_map);
|
|
priv->int_done_map &= ~(1 << slot);
|
|
slots = priv->int_slots;
|
|
/* This should not trigger, and could be removed if
|
|
noone have any problems with it triggering: */
|
|
if (!slots[slot].qh) {
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
ptd_offset = INT_PTD_OFFSET;
|
|
ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd);
|
|
state = check_int_transfer(hcd, &ptd,
|
|
slots[slot].qtd->urb);
|
|
} else {
|
|
/* ATL ptd */
|
|
slot = __ffs(priv->atl_done_map);
|
|
priv->atl_done_map &= ~(1 << slot);
|
|
slots = priv->atl_slots;
|
|
/* This should not trigger, and could be removed if
|
|
noone have any problems with it triggering: */
|
|
if (!slots[slot].qh) {
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
ptd_offset = ATL_PTD_OFFSET;
|
|
ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
|
|
state = check_atl_transfer(hcd, &ptd,
|
|
slots[slot].qtd->urb);
|
|
}
|
|
|
|
qtd = slots[slot].qtd;
|
|
slots[slot].qtd = NULL;
|
|
qh = slots[slot].qh;
|
|
slots[slot].qh = NULL;
|
|
qh->slot = -1;
|
|
|
|
WARN_ON(qtd->status != QTD_XFER_STARTED);
|
|
|
|
switch (state) {
|
|
case PTD_STATE_QTD_DONE:
|
|
if ((usb_pipeint(qtd->urb->pipe)) &&
|
|
(qtd->urb->dev->speed != USB_SPEED_HIGH))
|
|
qtd->actual_length =
|
|
FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd.dw3);
|
|
else
|
|
qtd->actual_length =
|
|
FROM_DW3_NRBYTESTRANSFERRED(ptd.dw3);
|
|
|
|
qtd->status = QTD_XFER_COMPLETE;
|
|
if (list_is_last(&qtd->qtd_list, &qh->qtd_list) ||
|
|
is_short_bulk(qtd))
|
|
qtd = NULL;
|
|
else
|
|
qtd = list_entry(qtd->qtd_list.next,
|
|
typeof(*qtd), qtd_list);
|
|
|
|
qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3);
|
|
qh->ping = FROM_DW3_PING(ptd.dw3);
|
|
break;
|
|
|
|
case PTD_STATE_QTD_RELOAD: /* QTD_RETRY, for atls only */
|
|
qtd->status = QTD_PAYLOAD_ALLOC;
|
|
ptd.dw0 |= DW0_VALID_BIT;
|
|
/* RL counter = ERR counter */
|
|
ptd.dw3 &= ~TO_DW3_NAKCOUNT(0xf);
|
|
ptd.dw3 |= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd.dw2));
|
|
ptd.dw3 &= ~TO_DW3_CERR(3);
|
|
ptd.dw3 |= TO_DW3_CERR(ERR_COUNTER);
|
|
qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3);
|
|
qh->ping = FROM_DW3_PING(ptd.dw3);
|
|
break;
|
|
|
|
case PTD_STATE_URB_RETIRE:
|
|
qtd->status = QTD_RETIRE;
|
|
if ((qtd->urb->dev->speed != USB_SPEED_HIGH) &&
|
|
(qtd->urb->status != -EPIPE) &&
|
|
(qtd->urb->status != -EREMOTEIO)) {
|
|
qh->tt_buffer_dirty = 1;
|
|
if (usb_hub_clear_tt_buffer(qtd->urb))
|
|
/* Clear failed; let's hope things work
|
|
anyway */
|
|
qh->tt_buffer_dirty = 0;
|
|
}
|
|
qtd = NULL;
|
|
qh->toggle = 0;
|
|
qh->ping = 0;
|
|
break;
|
|
|
|
default:
|
|
WARN_ON(1);
|
|
continue;
|
|
}
|
|
|
|
if (qtd && (qtd->status == QTD_PAYLOAD_ALLOC)) {
|
|
if (slots == priv->int_slots) {
|
|
if (state == PTD_STATE_QTD_RELOAD)
|
|
dev_err(hcd->self.controller,
|
|
"%s: PTD_STATE_QTD_RELOAD on "
|
|
"interrupt packet\n", __func__);
|
|
if (state != PTD_STATE_QTD_RELOAD)
|
|
create_ptd_int(qh, qtd, &ptd);
|
|
} else {
|
|
if (state != PTD_STATE_QTD_RELOAD)
|
|
create_ptd_atl(qh, qtd, &ptd);
|
|
}
|
|
|
|
start_bus_transfer(hcd, ptd_offset, slot, slots, qtd,
|
|
qh, &ptd);
|
|
}
|
|
}
|
|
|
|
if (modified)
|
|
schedule_ptds(hcd);
|
|
}
|
|
|
|
static irqreturn_t isp1760_irq(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 imask;
|
|
irqreturn_t irqret = IRQ_NONE;
|
|
|
|
spin_lock(&priv->lock);
|
|
|
|
if (!(hcd->state & HC_STATE_RUNNING))
|
|
goto leave;
|
|
|
|
imask = reg_read32(hcd->regs, HC_INTERRUPT_REG);
|
|
if (unlikely(!imask))
|
|
goto leave;
|
|
reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); /* Clear */
|
|
|
|
priv->int_done_map |= reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG);
|
|
priv->atl_done_map |= reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG);
|
|
|
|
handle_done_ptds(hcd);
|
|
|
|
irqret = IRQ_HANDLED;
|
|
leave:
|
|
spin_unlock(&priv->lock);
|
|
|
|
return irqret;
|
|
}
|
|
|
|
/*
|
|
* Workaround for problem described in chip errata 2:
|
|
*
|
|
* Sometimes interrupts are not generated when ATL (not INT?) completion occurs.
|
|
* One solution suggested in the errata is to use SOF interrupts _instead_of_
|
|
* ATL done interrupts (the "instead of" might be important since it seems
|
|
* enabling ATL interrupts also causes the chip to sometimes - rarely - "forget"
|
|
* to set the PTD's done bit in addition to not generating an interrupt!).
|
|
*
|
|
* So if we use SOF + ATL interrupts, we sometimes get stale PTDs since their
|
|
* done bit is not being set. This is bad - it blocks the endpoint until reboot.
|
|
*
|
|
* If we use SOF interrupts only, we get latency between ptd completion and the
|
|
* actual handling. This is very noticeable in testusb runs which takes several
|
|
* minutes longer without ATL interrupts.
|
|
*
|
|
* A better solution is to run the code below every SLOT_CHECK_PERIOD ms. If it
|
|
* finds active ATL slots which are older than SLOT_TIMEOUT ms, it checks the
|
|
* slot's ACTIVE and VALID bits. If these are not set, the ptd is considered
|
|
* completed and its done map bit is set.
|
|
*
|
|
* The values of SLOT_TIMEOUT and SLOT_CHECK_PERIOD have been arbitrarily chosen
|
|
* not to cause too much lag when this HW bug occurs, while still hopefully
|
|
* ensuring that the check does not falsely trigger.
|
|
*/
|
|
#define SLOT_TIMEOUT 300
|
|
#define SLOT_CHECK_PERIOD 200
|
|
static struct timer_list errata2_timer;
|
|
|
|
void errata2_function(unsigned long data)
|
|
{
|
|
struct usb_hcd *hcd = (struct usb_hcd *) data;
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int slot;
|
|
struct ptd ptd;
|
|
unsigned long spinflags;
|
|
|
|
spin_lock_irqsave(&priv->lock, spinflags);
|
|
|
|
for (slot = 0; slot < 32; slot++)
|
|
if (priv->atl_slots[slot].qh && time_after(jiffies,
|
|
priv->atl_slots[slot].timestamp +
|
|
SLOT_TIMEOUT * HZ / 1000)) {
|
|
ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
|
|
if (!FROM_DW0_VALID(ptd.dw0) &&
|
|
!FROM_DW3_ACTIVE(ptd.dw3))
|
|
priv->atl_done_map |= 1 << slot;
|
|
}
|
|
|
|
if (priv->atl_done_map)
|
|
handle_done_ptds(hcd);
|
|
|
|
spin_unlock_irqrestore(&priv->lock, spinflags);
|
|
|
|
errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000;
|
|
add_timer(&errata2_timer);
|
|
}
|
|
|
|
static int isp1760_run(struct usb_hcd *hcd)
|
|
{
|
|
int retval;
|
|
u32 temp;
|
|
u32 command;
|
|
u32 chipid;
|
|
|
|
hcd->uses_new_polling = 1;
|
|
|
|
hcd->state = HC_STATE_RUNNING;
|
|
|
|
/* Set PTD interrupt AND & OR maps */
|
|
reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0);
|
|
reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0xffffffff);
|
|
reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0);
|
|
reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0xffffffff);
|
|
reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0);
|
|
reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff);
|
|
/* step 23 passed */
|
|
|
|
temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
|
|
reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN);
|
|
|
|
command = reg_read32(hcd->regs, HC_USBCMD);
|
|
command &= ~(CMD_LRESET|CMD_RESET);
|
|
command |= CMD_RUN;
|
|
reg_write32(hcd->regs, HC_USBCMD, command);
|
|
|
|
retval = handshake(hcd, 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);
|
|
reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF);
|
|
|
|
retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000);
|
|
up_write(&ehci_cf_port_reset_rwsem);
|
|
if (retval)
|
|
return retval;
|
|
|
|
init_timer(&errata2_timer);
|
|
errata2_timer.function = errata2_function;
|
|
errata2_timer.data = (unsigned long) hcd;
|
|
errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000;
|
|
add_timer(&errata2_timer);
|
|
|
|
chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG);
|
|
dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n",
|
|
chipid & 0xffff, chipid >> 16);
|
|
|
|
/* PTD Register Init Part 2, Step 28 */
|
|
|
|
/* Setup registers controlling PTD checking */
|
|
reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000);
|
|
reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000);
|
|
reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001);
|
|
reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0xffffffff);
|
|
reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0xffffffff);
|
|
reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0xffffffff);
|
|
reg_write32(hcd->regs, HC_BUFFER_STATUS_REG,
|
|
ATL_BUF_FILL | INT_BUF_FILL);
|
|
|
|
/* 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 int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len)
|
|
{
|
|
qtd->data_buffer = databuffer;
|
|
|
|
if (len > MAX_PAYLOAD_SIZE)
|
|
len = MAX_PAYLOAD_SIZE;
|
|
qtd->length = len;
|
|
|
|
return qtd->length;
|
|
}
|
|
|
|
static void qtd_list_free(struct list_head *qtd_list)
|
|
{
|
|
struct isp1760_qtd *qtd, *qtd_next;
|
|
|
|
list_for_each_entry_safe(qtd, qtd_next, qtd_list, qtd_list) {
|
|
list_del(&qtd->qtd_list);
|
|
qtd_free(qtd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize.
|
|
* Also calculate the PID type (SETUP/IN/OUT) for each packet.
|
|
*/
|
|
#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
|
|
static void packetize_urb(struct usb_hcd *hcd,
|
|
struct urb *urb, struct list_head *head, gfp_t flags)
|
|
{
|
|
struct isp1760_qtd *qtd;
|
|
void *buf;
|
|
int len, maxpacketsize;
|
|
u8 packet_type;
|
|
|
|
/*
|
|
* URBs map to sequences of QTDs: one logical transaction
|
|
*/
|
|
|
|
if (!urb->transfer_buffer && urb->transfer_buffer_length) {
|
|
/* XXX This looks like usb storage / SCSI bug */
|
|
dev_err(hcd->self.controller,
|
|
"buf is null, dma is %08lx len is %d\n",
|
|
(long unsigned)urb->transfer_dma,
|
|
urb->transfer_buffer_length);
|
|
WARN_ON(1);
|
|
}
|
|
|
|
if (usb_pipein(urb->pipe))
|
|
packet_type = IN_PID;
|
|
else
|
|
packet_type = OUT_PID;
|
|
|
|
if (usb_pipecontrol(urb->pipe)) {
|
|
qtd = qtd_alloc(flags, urb, SETUP_PID);
|
|
if (!qtd)
|
|
goto cleanup;
|
|
qtd_fill(qtd, urb->setup_packet, sizeof(struct usb_ctrlrequest));
|
|
list_add_tail(&qtd->qtd_list, head);
|
|
|
|
/* for zero length DATA stages, STATUS is always IN */
|
|
if (urb->transfer_buffer_length == 0)
|
|
packet_type = IN_PID;
|
|
}
|
|
|
|
maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe,
|
|
usb_pipeout(urb->pipe)));
|
|
|
|
/*
|
|
* buffer gets wrapped in one or more qtds;
|
|
* last one may be "short" (including zero len)
|
|
* and may serve as a control status ack
|
|
*/
|
|
buf = urb->transfer_buffer;
|
|
len = urb->transfer_buffer_length;
|
|
|
|
for (;;) {
|
|
int this_qtd_len;
|
|
|
|
qtd = qtd_alloc(flags, urb, packet_type);
|
|
if (!qtd)
|
|
goto cleanup;
|
|
this_qtd_len = qtd_fill(qtd, buf, len);
|
|
list_add_tail(&qtd->qtd_list, head);
|
|
|
|
len -= this_qtd_len;
|
|
buf += this_qtd_len;
|
|
|
|
if (len <= 0)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
if (packet_type == IN_PID)
|
|
packet_type = OUT_PID;
|
|
else
|
|
packet_type = IN_PID;
|
|
} else if (usb_pipebulk(urb->pipe)
|
|
&& (urb->transfer_flags & URB_ZERO_PACKET)
|
|
&& !(urb->transfer_buffer_length %
|
|
maxpacketsize)) {
|
|
one_more = 1;
|
|
}
|
|
if (one_more) {
|
|
qtd = qtd_alloc(flags, urb, packet_type);
|
|
if (!qtd)
|
|
goto cleanup;
|
|
|
|
/* never any data in such packets */
|
|
qtd_fill(qtd, NULL, 0);
|
|
list_add_tail(&qtd->qtd_list, head);
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
cleanup:
|
|
qtd_list_free(head);
|
|
}
|
|
|
|
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 *ep_queue;
|
|
struct isp1760_qh *qh, *qhit;
|
|
unsigned long spinflags;
|
|
LIST_HEAD(new_qtds);
|
|
int retval;
|
|
int qh_in_queue;
|
|
|
|
switch (usb_pipetype(urb->pipe)) {
|
|
case PIPE_CONTROL:
|
|
ep_queue = &priv->controlqhs;
|
|
break;
|
|
case PIPE_BULK:
|
|
ep_queue = &priv->bulkqhs;
|
|
break;
|
|
case PIPE_INTERRUPT:
|
|
if (urb->interval < 0)
|
|
return -EINVAL;
|
|
/* FIXME: Check bandwidth */
|
|
ep_queue = &priv->interruptqhs;
|
|
break;
|
|
case PIPE_ISOCHRONOUS:
|
|
dev_err(hcd->self.controller, "%s: isochronous USB packets "
|
|
"not yet supported\n",
|
|
__func__);
|
|
return -EPIPE;
|
|
default:
|
|
dev_err(hcd->self.controller, "%s: unknown pipe type\n",
|
|
__func__);
|
|
return -EPIPE;
|
|
}
|
|
|
|
if (usb_pipein(urb->pipe))
|
|
urb->actual_length = 0;
|
|
|
|
packetize_urb(hcd, urb, &new_qtds, mem_flags);
|
|
if (list_empty(&new_qtds))
|
|
return -ENOMEM;
|
|
|
|
retval = 0;
|
|
spin_lock_irqsave(&priv->lock, spinflags);
|
|
|
|
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
|
|
retval = -ESHUTDOWN;
|
|
goto out;
|
|
}
|
|
retval = usb_hcd_link_urb_to_ep(hcd, urb);
|
|
if (retval)
|
|
goto out;
|
|
|
|
qh = urb->ep->hcpriv;
|
|
if (qh) {
|
|
qh_in_queue = 0;
|
|
list_for_each_entry(qhit, ep_queue, qh_list) {
|
|
if (qhit == qh) {
|
|
qh_in_queue = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!qh_in_queue)
|
|
list_add_tail(&qh->qh_list, ep_queue);
|
|
} else {
|
|
qh = qh_alloc(GFP_ATOMIC);
|
|
if (!qh) {
|
|
retval = -ENOMEM;
|
|
usb_hcd_unlink_urb_from_ep(hcd, urb);
|
|
goto out;
|
|
}
|
|
list_add_tail(&qh->qh_list, ep_queue);
|
|
urb->ep->hcpriv = qh;
|
|
}
|
|
|
|
list_splice_tail(&new_qtds, &qh->qtd_list);
|
|
schedule_ptds(hcd);
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lock, spinflags);
|
|
return retval;
|
|
}
|
|
|
|
static void kill_transfer(struct usb_hcd *hcd, struct urb *urb,
|
|
struct isp1760_qh *qh)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
int skip_map;
|
|
|
|
WARN_ON(qh->slot == -1);
|
|
|
|
/* We need to forcefully reclaim the slot since some transfers never
|
|
return, e.g. interrupt transfers and NAKed bulk transfers. */
|
|
if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe)) {
|
|
skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
|
|
skip_map |= (1 << qh->slot);
|
|
reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
|
|
priv->atl_slots[qh->slot].qh = NULL;
|
|
priv->atl_slots[qh->slot].qtd = NULL;
|
|
} else {
|
|
skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
|
|
skip_map |= (1 << qh->slot);
|
|
reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
|
|
priv->int_slots[qh->slot].qh = NULL;
|
|
priv->int_slots[qh->slot].qtd = NULL;
|
|
}
|
|
|
|
qh->slot = -1;
|
|
}
|
|
|
|
/*
|
|
* Retire the qtds beginning at 'qtd' and belonging all to the same urb, killing
|
|
* any active transfer belonging to the urb in the process.
|
|
*/
|
|
static void dequeue_urb_from_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh,
|
|
struct isp1760_qtd *qtd)
|
|
{
|
|
struct urb *urb;
|
|
int urb_was_running;
|
|
|
|
urb = qtd->urb;
|
|
urb_was_running = 0;
|
|
list_for_each_entry_from(qtd, &qh->qtd_list, qtd_list) {
|
|
if (qtd->urb != urb)
|
|
break;
|
|
|
|
if (qtd->status >= QTD_XFER_STARTED)
|
|
urb_was_running = 1;
|
|
if (last_qtd_of_urb(qtd, qh) &&
|
|
(qtd->status >= QTD_XFER_COMPLETE))
|
|
urb_was_running = 0;
|
|
|
|
if (qtd->status == QTD_XFER_STARTED)
|
|
kill_transfer(hcd, urb, qh);
|
|
qtd->status = QTD_RETIRE;
|
|
}
|
|
|
|
if ((urb->dev->speed != USB_SPEED_HIGH) && urb_was_running) {
|
|
qh->tt_buffer_dirty = 1;
|
|
if (usb_hub_clear_tt_buffer(urb))
|
|
/* Clear failed; let's hope things work anyway */
|
|
qh->tt_buffer_dirty = 0;
|
|
}
|
|
}
|
|
|
|
static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
|
|
int status)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
unsigned long spinflags;
|
|
struct isp1760_qh *qh;
|
|
struct isp1760_qtd *qtd;
|
|
int retval = 0;
|
|
|
|
spin_lock_irqsave(&priv->lock, spinflags);
|
|
retval = usb_hcd_check_unlink_urb(hcd, urb, status);
|
|
if (retval)
|
|
goto out;
|
|
|
|
qh = urb->ep->hcpriv;
|
|
if (!qh) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
list_for_each_entry(qtd, &qh->qtd_list, qtd_list)
|
|
if (qtd->urb == urb) {
|
|
dequeue_urb_from_qtd(hcd, qh, qtd);
|
|
break;
|
|
}
|
|
|
|
urb->status = status;
|
|
schedule_ptds(hcd);
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lock, spinflags);
|
|
return retval;
|
|
}
|
|
|
|
static void isp1760_endpoint_disable(struct usb_hcd *hcd,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
unsigned long spinflags;
|
|
struct isp1760_qh *qh;
|
|
struct isp1760_qtd *qtd;
|
|
|
|
spin_lock_irqsave(&priv->lock, spinflags);
|
|
|
|
qh = ep->hcpriv;
|
|
if (!qh)
|
|
goto out;
|
|
|
|
list_for_each_entry(qtd, &qh->qtd_list, qtd_list)
|
|
if (qtd->status != QTD_RETIRE) {
|
|
dequeue_urb_from_qtd(hcd, qh, qtd);
|
|
qtd->urb->status = -ECONNRESET;
|
|
}
|
|
|
|
ep->hcpriv = NULL;
|
|
/* Cannot free qh here since it will be parsed by schedule_ptds() */
|
|
|
|
schedule_ptds(hcd);
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lock, spinflags);
|
|
}
|
|
|
|
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 = reg_read32(hcd->regs, HC_PORTSC1);
|
|
|
|
if (temp & PORT_OWNER) {
|
|
if (temp & PORT_CSC) {
|
|
temp &= ~PORT_CSC;
|
|
reg_write32(hcd->regs, HC_PORTSC1, temp);
|
|
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;
|
|
|
|
/* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
|
|
memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
|
|
memset(&desc->u.hs.DeviceRemovable[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 usb_hcd *hcd, int index,
|
|
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)) {
|
|
|
|
dev_info(hcd->self.controller,
|
|
"port %d full speed --> companion\n",
|
|
index + 1);
|
|
|
|
port_status |= PORT_OWNER;
|
|
port_status &= ~PORT_RWC_BITS;
|
|
reg_write32(hcd->regs, HC_PORTSC1, port_status);
|
|
|
|
} else
|
|
dev_info(hcd->self.controller, "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 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 = reg_read32(hcd->regs, HC_PORTSC1);
|
|
|
|
/*
|
|
* 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_STAT_C_CONNECTION).
|
|
*/
|
|
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_ENABLE:
|
|
reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_PE);
|
|
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);
|
|
reg_write32(hcd->regs, HC_PORTSC1,
|
|
temp | PORT_RESUME);
|
|
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))
|
|
reg_write32(hcd->regs, HC_PORTSC1,
|
|
temp & ~PORT_POWER);
|
|
break;
|
|
case USB_PORT_FEAT_C_CONNECTION:
|
|
reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_CSC);
|
|
break;
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
/* XXX error ?*/
|
|
break;
|
|
case USB_PORT_FEAT_C_RESET:
|
|
/* GetPortStatus clears reset */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
reg_read32(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 = reg_read32(hcd->regs, HC_PORTSC1);
|
|
|
|
/* wPortChange bits */
|
|
if (temp & PORT_CSC)
|
|
status |= USB_PORT_STAT_C_CONNECTION << 16;
|
|
|
|
|
|
/* whoever resumes must GetPortStatus to complete it!! */
|
|
if (temp & PORT_RESUME) {
|
|
dev_err(hcd->self.controller, "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(&hcd->rh_timer, priv->reset_done);
|
|
}
|
|
|
|
/* resume completed? */
|
|
else if (time_after_eq(jiffies,
|
|
priv->reset_done)) {
|
|
status |= USB_PORT_STAT_C_SUSPEND << 16;
|
|
priv->reset_done = 0;
|
|
|
|
/* stop resume signaling */
|
|
temp = reg_read32(hcd->regs, HC_PORTSC1);
|
|
reg_write32(hcd->regs, HC_PORTSC1,
|
|
temp & ~(PORT_RWC_BITS | PORT_RESUME));
|
|
retval = handshake(hcd, HC_PORTSC1,
|
|
PORT_RESUME, 0, 2000 /* 2msec */);
|
|
if (retval != 0) {
|
|
dev_err(hcd->self.controller,
|
|
"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 |= USB_PORT_STAT_C_RESET << 16;
|
|
priv->reset_done = 0;
|
|
|
|
/* force reset to complete */
|
|
reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_RESET);
|
|
/* REVISIT: some hardware needs 550+ usec to clear
|
|
* this bit; seems too long to spin routinely...
|
|
*/
|
|
retval = handshake(hcd, HC_PORTSC1,
|
|
PORT_RESET, 0, 750);
|
|
if (retval != 0) {
|
|
dev_err(hcd->self.controller, "port %d reset error %d\n",
|
|
wIndex + 1, retval);
|
|
goto error;
|
|
}
|
|
|
|
/* see what we found out */
|
|
temp = check_reset_complete(hcd, wIndex,
|
|
reg_read32(hcd->regs, HC_PORTSC1));
|
|
}
|
|
/*
|
|
* 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)
|
|
dev_err(hcd->self.controller, "PORT_OWNER is set\n");
|
|
|
|
if (temp & PORT_CONNECT) {
|
|
status |= USB_PORT_STAT_CONNECTION;
|
|
/* status may be from integrated TT */
|
|
status |= USB_PORT_STAT_HIGH_SPEED;
|
|
}
|
|
if (temp & PORT_PE)
|
|
status |= USB_PORT_STAT_ENABLE;
|
|
if (temp & (PORT_SUSPEND|PORT_RESUME))
|
|
status |= USB_PORT_STAT_SUSPEND;
|
|
if (temp & PORT_RESET)
|
|
status |= USB_PORT_STAT_RESET;
|
|
if (temp & PORT_POWER)
|
|
status |= USB_PORT_STAT_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 = reg_read32(hcd->regs, HC_PORTSC1);
|
|
if (temp & PORT_OWNER)
|
|
break;
|
|
|
|
/* temp &= ~PORT_RWC_BITS; */
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_ENABLE:
|
|
reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE);
|
|
break;
|
|
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if ((temp & PORT_PE) == 0
|
|
|| (temp & PORT_RESET) != 0)
|
|
goto error;
|
|
|
|
reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (HCS_PPC(priv->hcs_params))
|
|
reg_write32(hcd->regs, HC_PORTSC1,
|
|
temp | PORT_POWER);
|
|
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);
|
|
}
|
|
reg_write32(hcd->regs, HC_PORTSC1, temp);
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
reg_read32(hcd->regs, HC_USBCMD);
|
|
break;
|
|
|
|
default:
|
|
error:
|
|
/* "stall" on error */
|
|
retval = -EPIPE;
|
|
}
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
static int isp1760_get_frame(struct usb_hcd *hcd)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
u32 fr;
|
|
|
|
fr = reg_read32(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;
|
|
|
|
del_timer(&errata2_timer);
|
|
|
|
isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
|
|
NULL, 0);
|
|
mdelay(20);
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
ehci_reset(hcd);
|
|
/* Disable IRQ */
|
|
temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
|
|
reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
reg_write32(hcd->regs, HC_CONFIGFLAG, 0);
|
|
}
|
|
|
|
static void isp1760_shutdown(struct usb_hcd *hcd)
|
|
{
|
|
u32 command, temp;
|
|
|
|
isp1760_stop(hcd);
|
|
temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
|
|
reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
|
|
|
|
command = reg_read32(hcd->regs, HC_USBCMD);
|
|
command &= ~CMD_RUN;
|
|
reg_write32(hcd->regs, HC_USBCMD, command);
|
|
}
|
|
|
|
static void isp1760_clear_tt_buffer_complete(struct usb_hcd *hcd,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
struct isp1760_hcd *priv = hcd_to_priv(hcd);
|
|
struct isp1760_qh *qh = ep->hcpriv;
|
|
unsigned long spinflags;
|
|
|
|
if (!qh)
|
|
return;
|
|
|
|
spin_lock_irqsave(&priv->lock, spinflags);
|
|
qh->tt_buffer_dirty = 0;
|
|
schedule_ptds(hcd);
|
|
spin_unlock_irqrestore(&priv->lock, spinflags);
|
|
}
|
|
|
|
|
|
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,
|
|
.clear_tt_buffer_complete = isp1760_clear_tt_buffer_complete,
|
|
};
|
|
|
|
int __init init_kmem_once(void)
|
|
{
|
|
urb_listitem_cachep = kmem_cache_create("isp1760 urb_listitem",
|
|
sizeof(struct urb_listitem), 0, SLAB_TEMPORARY |
|
|
SLAB_MEM_SPREAD, NULL);
|
|
|
|
if (!urb_listitem_cachep)
|
|
return -ENOMEM;
|
|
|
|
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);
|
|
kmem_cache_destroy(urb_listitem_cachep);
|
|
}
|
|
|
|
struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
|
|
int irq, unsigned long irqflags,
|
|
int rst_gpio,
|
|
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;
|
|
priv->rst_gpio = rst_gpio;
|
|
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");
|