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linux_dsm_epyc7002/drivers/usb/host/isp1760-hcd.c
Arvid Brodin 65f1b5255c usb/isp1760: Replace period calculation for INT packets with something readable 
Replace the period calculation for INT packets with something readable. Seems
to fix a rare bug with quickly repeated insertion/removal of several USB
devices simultaneously (hub control INT packets).

Signed-off-by: Arvid Brodin <arvid.brodin@enea.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-02-28 19:23:38 -08:00

2254 lines
54 KiB
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/*
* 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>
*
*/
#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 <asm/unaligned.h>
#include <asm/cacheflush.h>
#include "isp1760-hcd.h"
static struct kmem_cache *qtd_cachep;
static struct kmem_cache *qh_cachep;
struct isp1760_hcd {
u32 hcs_params;
spinlock_t lock;
struct inter_packet_info atl_ints[32];
struct inter_packet_info int_ints[32];
struct memory_chunk memory_pool[BLOCKS];
u32 atl_queued;
/* 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;
};
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;
u8 toggle;
void *data_buffer;
u32 payload_addr;
/* the rest is HCD-private */
struct list_head qtd_list;
struct urb *urb;
size_t length;
/* isp special*/
u32 status;
#define URB_ENQUEUED (1 << 1)
};
struct isp1760_qh {
/* first part defined by EHCI spec */
struct list_head qtd_list;
u32 toggle;
u32 ping;
};
/*
* 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;
}
BUG_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;
BUG_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;
}
}
dev_err(hcd->self.controller,
"%s: Can not allocate %lu bytes of memory\n"
"Current memory map:\n",
__func__, qtd->length);
for (i = 0; i < BLOCKS; i++) {
dev_err(hcd->self.controller, "Pool %2d size %4d status: %d\n",
i, priv->memory_pool[i].size,
priv->memory_pool[i].free);
}
/* XXX maybe -ENOMEM could be possible */
BUG();
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) {
BUG_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);
BUG();
}
static void isp1760_init_regs(struct usb_hcd *hcd)
{
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);
reg_write32(hcd->regs, HC_ATL_PTD_DONEMAP_REG, ~NO_TRANSFER_ACTIVE);
reg_write32(hcd->regs, HC_INT_PTD_DONEMAP_REG, ~NO_TRANSFER_ACTIVE);
reg_write32(hcd->regs, HC_ISO_PTD_DONEMAP_REG, ~NO_TRANSFER_ACTIVE);
}
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 void qh_destroy(struct isp1760_qh *qh)
{
BUG_ON(!list_empty(&qh->qtd_list));
kmem_cache_free(qh_cachep, qh);
}
static struct isp1760_qh *isp1760_qh_alloc(gfp_t flags)
{
struct isp1760_qh *qh;
qh = kmem_cache_zalloc(qh_cachep, flags);
if (!qh)
return qh;
INIT_LIST_HEAD(&qh->qtd_list);
return qh;
}
/* 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 */
/* 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);
/*
* 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;
/* 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 */
isp1760_init_regs(hcd);
/* 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_REG, INTERRUPT_ENABLE_MASK);
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 void isp1760_init_maps(struct usb_hcd *hcd)
{
/*set last maps, for iso its only 1, else 32 tds bitmap*/
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);
}
static void isp1760_enable_interrupts(struct usb_hcd *hcd)
{
reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0);
reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0);
reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0);
reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0);
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 */
}
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;
isp1760_enable_interrupts(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_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;
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 */
/* 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_qh *qh,
struct isp1760_qtd *qtd, struct ptd *ptd)
{
u32 maxpacket;
u32 multi;
u32 pid_code;
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 = PTD_VALID;
ptd->dw0 |= PTD_LENGTH(qtd->length);
ptd->dw0 |= PTD_MAXPACKET(maxpacket);
ptd->dw0 |= PTD_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe));
/* DW1 */
ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1;
ptd->dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe));
pid_code = qtd->packet_type;
ptd->dw1 |= PTD_PID_TOKEN(pid_code);
if (usb_pipebulk(qtd->urb->pipe))
ptd->dw1 |= PTD_TRANS_BULK;
else if (usb_pipeint(qtd->urb->pipe))
ptd->dw1 |= PTD_TRANS_INT;
if (qtd->urb->dev->speed != USB_SPEED_HIGH) {
/* split transaction */
ptd->dw1 |= PTD_TRANS_SPLIT;
if (qtd->urb->dev->speed == USB_SPEED_LOW)
ptd->dw1 |= PTD_SE_USB_LOSPEED;
ptd->dw1 |= PTD_PORT_NUM(qtd->urb->dev->ttport);
ptd->dw1 |= PTD_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;
ptd->dw3 = 0;
rl = 0;
nak = 0;
} else {
ptd->dw0 |= PTD_MULTI(multi);
if (usb_pipecontrol(qtd->urb->pipe) ||
usb_pipebulk(qtd->urb->pipe))
ptd->dw3 = qh->ping;
else
ptd->dw3 = 0;
}
/* DW2 */
ptd->dw2 = 0;
ptd->dw2 |= PTD_DATA_START_ADDR(base_to_chip(qtd->payload_addr));
ptd->dw2 |= PTD_RL_CNT(rl);
ptd->dw3 |= PTD_NAC_CNT(nak);
/* DW3 */
if (usb_pipecontrol(qtd->urb->pipe))
ptd->dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
else
ptd->dw3 |= qh->toggle;
ptd->dw3 |= PTD_ACTIVE;
/* Cerr */
ptd->dw3 |= PTD_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 transform_into_int(struct isp1760_qh *qh,
struct isp1760_qtd *qtd, struct ptd *ptd)
{
transform_into_atl(qh, qtd, ptd);
transform_add_int(qh, qtd, 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 > MAX_PAYLOAD_SIZE)
count = MAX_PAYLOAD_SIZE;
else
count = len;
qtd->length = count;
return count;
}
static int check_error(struct usb_hcd *hcd, struct ptd *ptd)
{
int error = 0;
if (ptd->dw3 & DW3_HALT_BIT) {
error = -EPIPE;
if (ptd->dw3 & DW3_ERROR_BIT)
pr_err("error bit is set in DW3\n");
}
if (ptd->dw3 & DW3_QTD_ACTIVE) {
dev_err(hcd->self.controller, "Transfer active bit is set DW3\n"
"nak counter: %d, rl: %d\n",
(ptd->dw3 >> 19) & 0xf, (ptd->dw2 >> 25) & 0xf);
}
return error;
}
static void check_int_err_status(struct usb_hcd *hcd, u32 dw4)
{
u32 i;
dw4 >>= 8;
for (i = 0; i < 8; i++) {
switch (dw4 & 0x7) {
case INT_UNDERRUN:
dev_err(hcd->self.controller, "Underrun (%d)\n", i);
break;
case INT_EXACT:
dev_err(hcd->self.controller,
"Transaction error (%d)\n", i);
break;
case INT_BABBLE:
dev_err(hcd->self.controller, "Babble error (%d)\n", i);
break;
}
dw4 >>= 3;
}
}
static void enqueue_one_qtd(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
{
if (qtd->length && (qtd->length <= MAX_PAYLOAD_SIZE)) {
switch (qtd->packet_type) {
case IN_PID:
break;
case OUT_PID:
case SETUP_PID:
mem_writes8(hcd->regs, qtd->payload_addr,
qtd->data_buffer, qtd->length);
}
}
}
static void enqueue_one_atl_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh,
u32 slot, struct isp1760_qtd *qtd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
struct ptd ptd;
alloc_mem(hcd, qtd);
transform_into_atl(qh, qtd, &ptd);
ptd_write(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
enqueue_one_qtd(hcd, qtd);
priv->atl_ints[slot].qh = qh;
priv->atl_ints[slot].qtd = qtd;
qtd->status |= URB_ENQUEUED;
qtd->status |= slot << 16;
}
static void enqueue_one_int_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh,
u32 slot, struct isp1760_qtd *qtd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
struct ptd ptd;
alloc_mem(hcd, qtd);
transform_into_int(qh, qtd, &ptd);
ptd_write(hcd->regs, INT_PTD_OFFSET, slot, &ptd);
enqueue_one_qtd(hcd, qtd);
priv->int_ints[slot].qh = qh;
priv->int_ints[slot].qtd = qtd;
qtd->status |= URB_ENQUEUED;
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 slot;
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).
*/
mmiowb();
ndelay(195);
skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
BUG_ON(!skip_map);
slot = __ffs(skip_map);
enqueue_one_atl_qtd(hcd, qh, slot, qtd);
or_map = reg_read32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG);
or_map |= (1 << slot);
reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, or_map);
skip_map &= ~(1 << slot);
reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
priv->atl_queued++;
if (priv->atl_queued == 2)
reg_write32(hcd->regs, HC_INTERRUPT_ENABLE,
INTERRUPT_ENABLE_SOT_MASK);
buffstatus = reg_read32(hcd->regs, HC_BUFFER_STATUS_REG);
buffstatus |= ATL_BUFFER;
reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, buffstatus);
}
static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
struct isp1760_qtd *qtd)
{
u32 skip_map, or_map;
u32 slot;
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).
*/
mmiowb();
ndelay(195);
skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
BUG_ON(!skip_map);
slot = __ffs(skip_map);
enqueue_one_int_qtd(hcd, qh, slot, qtd);
or_map = reg_read32(hcd->regs, HC_INT_IRQ_MASK_OR_REG);
or_map |= (1 << slot);
reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, or_map);
skip_map &= ~(1 << slot);
reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
buffstatus = reg_read32(hcd->regs, HC_BUFFER_STATUS_REG);
buffstatus |= INT_BUFFER;
reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, buffstatus);
}
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 void isp1760_qtd_free(struct isp1760_qtd *qtd)
{
BUG_ON(qtd->payload_addr);
kmem_cache_free(qtd_cachep, qtd);
}
static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd,
struct isp1760_qh *qh)
{
struct isp1760_qtd *tmp_qtd;
if (list_is_last(&qtd->qtd_list, &qh->qtd_list))
tmp_qtd = NULL;
else
tmp_qtd = list_entry(qtd->qtd_list.next, struct isp1760_qtd,
qtd_list);
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_qh *qh)
{
struct urb *urb;
urb = qtd->urb;
do {
qtd = clean_this_qtd(qtd, qh);
} while (qtd && (qtd->urb == urb));
return qtd;
}
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);
}
static void do_atl_int(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
u32 done_map, skip_map;
struct ptd ptd;
struct urb *urb;
u32 slot;
u32 length;
u32 or_map;
u32 status = -EINVAL;
int error;
struct isp1760_qtd *qtd;
struct isp1760_qh *qh;
u32 rl;
u32 nakcount;
done_map = reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG);
skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
or_map = reg_read32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG);
or_map &= ~done_map;
reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, or_map);
while (done_map) {
status = 0;
priv->atl_queued--;
slot = __ffs(done_map);
done_map &= ~(1 << slot);
skip_map |= (1 << slot);
qtd = priv->atl_ints[slot].qtd;
qh = priv->atl_ints[slot].qh;
if (!qh) {
dev_err(hcd->self.controller, "qh is 0\n");
continue;
}
ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
rl = (ptd.dw2 >> 25) & 0x0f;
nakcount = (ptd.dw3 >> 19) & 0xf;
/* Transfer Error, *but* active and no HALT -> reload */
if ((ptd.dw3 & DW3_ERROR_BIT) && (ptd.dw3 & DW3_QTD_ACTIVE) &&
!(ptd.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(ptd.dw3);
dev_err(hcd->self.controller,
"Should reload now... transferred %d "
"of %zu\n", length, qtd->length);
BUG();
}
if (!nakcount && (ptd.dw3 & DW3_QTD_ACTIVE)) {
u32 buffstatus;
/*
* 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.
*/
/* RL counter = ERR counter */
ptd.dw3 &= ~(0xf << 19);
ptd.dw3 |= rl << 19;
ptd.dw3 &= ~(3 << (55 - 32));
ptd.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 << slot);
or_map = reg_read32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG);
or_map |= 1 << slot;
reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, or_map);
ptd.dw0 |= PTD_VALID;
ptd_write(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
priv->atl_queued++;
if (priv->atl_queued == 2)
reg_write32(hcd->regs, HC_INTERRUPT_ENABLE,
INTERRUPT_ENABLE_SOT_MASK);
buffstatus = reg_read32(hcd->regs,
HC_BUFFER_STATUS_REG);
buffstatus |= ATL_BUFFER;
reg_write32(hcd->regs, HC_BUFFER_STATUS_REG,
buffstatus);
continue;
}
error = check_error(hcd, &ptd);
if (error) {
status = error;
priv->atl_ints[slot].qh->toggle = 0;
priv->atl_ints[slot].qh->ping = 0;
qtd->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(qtd->urb->pipe) == PIPE_BULK) {
priv->atl_ints[slot].qh->toggle =
ptd.dw3 & (1 << 25);
priv->atl_ints[slot].qh->ping =
ptd.dw3 & (1 << 26);
}
}
length = PTD_XFERRED_LENGTH(ptd.dw3);
if (length) {
switch (DW1_GET_PID(ptd.dw1)) {
case IN_PID:
mem_reads8(hcd->regs, qtd->payload_addr,
qtd->data_buffer, length);
case OUT_PID:
qtd->urb->actual_length += length;
case SETUP_PID:
break;
}
}
priv->atl_ints[slot].qtd = NULL;
priv->atl_ints[slot].qh = NULL;
free_mem(hcd, qtd);
reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
if (qtd->urb->status == -EPIPE) {
/* HALT was received */
urb = qtd->urb;
qtd = clean_up_qtdlist(qtd, qh);
isp1760_urb_done(hcd, urb);
} else if (usb_pipebulk(qtd->urb->pipe) &&
(length < qtd->length)) {
/* short BULK received */
if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) {
qtd->urb->status = -EREMOTEIO;
dev_dbg(hcd->self.controller,
"short bulk, %d instead %zu "
"with URB_SHORT_NOT_OK flag.\n",
length, qtd->length);
}
if (qtd->urb->status == -EINPROGRESS)
qtd->urb->status = 0;
urb = qtd->urb;
qtd = clean_up_qtdlist(qtd, qh);
isp1760_urb_done(hcd, urb);
} else if (last_qtd_of_urb(qtd, qh)) {
/* that was the last qtd of that URB */
if (qtd->urb->status == -EINPROGRESS)
qtd->urb->status = 0;
urb = qtd->urb;
qtd = clean_up_qtdlist(qtd, qh);
isp1760_urb_done(hcd, urb);
} else {
/* next QTD of this URB */
qtd = clean_this_qtd(qtd, qh);
BUG_ON(!qtd);
}
if (qtd)
enqueue_an_ATL_packet(hcd, qh, qtd);
skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
}
if (priv->atl_queued <= 1)
reg_write32(hcd->regs, HC_INTERRUPT_ENABLE,
INTERRUPT_ENABLE_MASK);
}
static void do_intl_int(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
u32 done_map, skip_map;
struct ptd ptd;
struct urb *urb;
u32 length;
u32 or_map;
int error;
u32 slot;
struct isp1760_qtd *qtd;
struct isp1760_qh *qh;
done_map = reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG);
skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
or_map = reg_read32(hcd->regs, HC_INT_IRQ_MASK_OR_REG);
or_map &= ~done_map;
reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, or_map);
while (done_map) {
slot = __ffs(done_map);
done_map &= ~(1 << slot);
skip_map |= (1 << slot);
qtd = priv->int_ints[slot].qtd;
qh = priv->int_ints[slot].qh;
if (!qh) {
dev_err(hcd->self.controller, "(INT) qh is 0\n");
continue;
}
ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd);
check_int_err_status(hcd, ptd.dw4);
error = check_error(hcd, &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
qtd->urb->status = -EPIPE;
priv->int_ints[slot].qh->toggle = 0;
priv->int_ints[slot].qh->ping = 0;
} else {
priv->int_ints[slot].qh->toggle = ptd.dw3 & (1 << 25);
priv->int_ints[slot].qh->ping = ptd.dw3 & (1 << 26);
}
if (qtd->urb->dev->speed != USB_SPEED_HIGH)
length = PTD_XFERRED_LENGTH_LO(ptd.dw3);
else
length = PTD_XFERRED_LENGTH(ptd.dw3);
if (length) {
switch (DW1_GET_PID(ptd.dw1)) {
case IN_PID:
mem_reads8(hcd->regs, qtd->payload_addr,
qtd->data_buffer, length);
case OUT_PID:
qtd->urb->actual_length += length;
case SETUP_PID:
break;
}
}
priv->int_ints[slot].qtd = NULL;
priv->int_ints[slot].qh = NULL;
reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
free_mem(hcd, qtd);
if (qtd->urb->status == -EPIPE) {
/* HALT received */
urb = qtd->urb;
qtd = clean_up_qtdlist(qtd, qh);
isp1760_urb_done(hcd, urb);
} else if (last_qtd_of_urb(qtd, qh)) {
if (qtd->urb->status == -EINPROGRESS)
qtd->urb->status = 0;
urb = qtd->urb;
qtd = clean_up_qtdlist(qtd, qh);
isp1760_urb_done(hcd, urb);
} else {
/* next QTD of this URB */
qtd = clean_this_qtd(qtd, qh);
BUG_ON(!qtd);
}
if (qtd)
enqueue_an_INT_packet(hcd, qh, qtd);
skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
}
}
static struct isp1760_qh *qh_make(struct usb_hcd *hcd, struct urb *urb,
gfp_t flags)
{
struct isp1760_qh *qh;
int is_input, type;
qh = isp1760_qh_alloc(flags);
if (!qh)
return qh;
/*
* init endpoint/device data for this QH
*/
is_input = usb_pipein(urb->pipe);
type = usb_pipetype(urb->pipe);
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 usb_hcd *hcd,
struct urb *urb, struct list_head *qtd_list, int epnum,
void **ptr)
{
struct isp1760_qh *qh;
qh = (struct isp1760_qh *)*ptr;
if (!qh) {
/* can't sleep here, we have priv->lock... */
qh = qh_make(hcd, urb, GFP_ATOMIC);
if (!qh)
return qh;
*ptr = qh;
}
list_splice(qtd_list, qh->qtd_list.prev);
return qh;
}
static void qtd_list_free(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 usb_hcd *hcd, struct urb *urb,
struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
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 (!HCD_HW_ACCESSIBLE(hcd)) {
rc = -ESHUTDOWN;
goto done;
}
rc = usb_hcd_link_urb_to_ep(hcd, 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(hcd, urb, qtd_list, epnum, &urb->ep->hcpriv);
if (!qh) {
usb_hcd_unlink_urb_from_ep(hcd, urb);
rc = -ENOMEM;
goto done;
}
if (!qh_busy)
p(hcd, qh, qtd);
done:
spin_unlock_irqrestore(&priv->lock, flags);
if (!qh)
qtd_list_free(urb, qtd_list);
return rc;
}
static struct isp1760_qtd *isp1760_qtd_alloc(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.
*/
#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
static struct list_head *qh_urb_transaction(struct usb_hcd *hcd,
struct urb *urb, struct list_head *head, gfp_t flags)
{
struct isp1760_qtd *qtd;
void *buf;
int len, maxpacket;
int is_input;
u32 token;
/*
* URBs map to sequences of QTDs: one logical transaction
*/
qtd = isp1760_qtd_alloc(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 = isp1760_qtd_alloc(flags);
if (!qtd)
goto cleanup;
qtd->urb = urb;
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 */
dev_err(hcd->self.controller, "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 = isp1760_qtd_alloc(flags);
if (!qtd)
goto cleanup;
qtd->urb = urb;
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 = isp1760_qtd_alloc(flags);
if (!qtd)
goto cleanup;
qtd->urb = urb;
list_add_tail(&qtd->qtd_list, head);
/* never any data in such packets */
qtd_fill(qtd, NULL, 0, token);
}
}
qtd->status = 0;
return head;
cleanup:
qtd_list_free(urb, head);
return NULL;
}
static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
gfp_t mem_flags)
{
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(hcd, urb, &qtd_list, mem_flags))
return -ENOMEM;
pe = enqueue_an_ATL_packet;
break;
case PIPE_INTERRUPT:
if (!qh_urb_transaction(hcd, urb, &qtd_list, mem_flags))
return -ENOMEM;
pe = enqueue_an_INT_packet;
break;
case PIPE_ISOCHRONOUS:
dev_err(hcd->self.controller, "PIPE_ISOCHRONOUS ain't supported\n");
default:
return -EPIPE;
}
return isp1760_prepare_enqueue(hcd, 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_PTD_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_PTD_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[i].qh)
continue;
BUG_ON(!ints[i].qtd);
if (ints[i].qtd->urb == urb) {
u32 skip_map;
u32 or_map;
struct isp1760_qtd *qtd;
struct isp1760_qh *qh;
skip_map = reg_read32(hcd->regs, skip_reg);
skip_map |= 1 << i;
reg_write32(hcd->regs, skip_reg, skip_map);
or_map = reg_read32(hcd->regs, or_reg);
or_map &= ~(1 << i);
reg_write32(hcd->regs, or_reg, or_map);
ptd_write(hcd->regs, reg_base, i, &ptd);
qtd = ints->qtd;
qh = ints[i].qh;
free_mem(hcd, qtd);
qtd = clean_up_qtdlist(qtd, qh);
ints->qh = NULL;
ints->qtd = NULL;
isp1760_urb_done(hcd, urb);
if (qtd)
pe(hcd, qh, qtd);
break;
} else {
struct isp1760_qtd *qtd;
list_for_each_entry(qtd, &ints[i].qtd->qtd_list,
qtd_list) {
if (qtd->urb == urb) {
clean_up_qtdlist(qtd, ints[i].qh);
isp1760_urb_done(hcd, urb);
qtd = NULL;
break;
}
}
/* We found the urb before the last slot */
if (!qtd)
break;
}
ints++;
}
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
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);
if (imask & (HC_ATL_INT | HC_SOT_INT))
do_atl_int(hcd);
if (imask & HC_INTL_INT)
do_intl_int(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 = 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;
/* 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 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_err(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_err(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 void isp1760_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
struct isp1760_hcd *priv = hcd_to_priv(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(hcd, qtd->urb, -ECONNRESET);
spin_lock_irqsave(&priv->lock, flags);
} else {
struct urb *urb;
urb = qtd->urb;
clean_up_qtdlist(qtd, qh);
urb->status = -ECONNRESET;
isp1760_urb_done(hcd, urb);
}
} 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 = 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;
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 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");
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