diff options
Diffstat (limited to 'drivers/usb/isp1760/isp1760-hcd.c')
| -rw-r--r-- | drivers/usb/isp1760/isp1760-hcd.c | 2234 |
1 files changed, 2234 insertions, 0 deletions
diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c new file mode 100644 index 000000000..8142c6b4c --- /dev/null +++ b/drivers/usb/isp1760/isp1760-hcd.c @@ -0,0 +1,2234 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * 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/gpio/consumer.h> +#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 "isp1760-core.h" +#include "isp1760-hcd.h" +#include "isp1760-regs.h" + +static struct kmem_cache *qtd_cachep; +static struct kmem_cache *qh_cachep; +static struct kmem_cache *urb_listitem_cachep; + +typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh, + struct isp1760_qtd *qtd); + +static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd) +{ + return *(struct isp1760_hcd **)hcd->hcd_priv; +} + +/* urb state*/ +#define DELETE_URB (0x0008) +#define NO_TRANSFER_ACTIVE (0xffffffff) + +/* Philips Proprietary Transfer Descriptor (PTD) */ +typedef __u32 __bitwise __dw; +struct ptd { + __dw dw0; + __dw dw1; + __dw dw2; + __dw dw3; + __dw dw4; + __dw dw5; + __dw dw6; + __dw dw7; +}; +#define PTD_OFFSET 0x0400 +#define ISO_PTD_OFFSET 0x0400 +#define INT_PTD_OFFSET 0x0800 +#define ATL_PTD_OFFSET 0x0c00 +#define PAYLOAD_OFFSET 0x1000 + + +/* ATL */ +/* DW0 */ +#define DW0_VALID_BIT 1 +#define FROM_DW0_VALID(x) ((x) & 0x01) +#define TO_DW0_LENGTH(x) (((u32) x) << 3) +#define TO_DW0_MAXPACKET(x) (((u32) x) << 18) +#define TO_DW0_MULTI(x) (((u32) x) << 29) +#define TO_DW0_ENDPOINT(x) (((u32) x) << 31) +/* DW1 */ +#define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3) +#define TO_DW1_PID_TOKEN(x) (((u32) x) << 10) +#define DW1_TRANS_BULK ((u32) 2 << 12) +#define DW1_TRANS_INT ((u32) 3 << 12) +#define DW1_TRANS_SPLIT ((u32) 1 << 14) +#define DW1_SE_USB_LOSPEED ((u32) 2 << 16) +#define TO_DW1_PORT_NUM(x) (((u32) x) << 18) +#define TO_DW1_HUB_NUM(x) (((u32) x) << 25) +/* DW2 */ +#define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8) +#define TO_DW2_RL(x) ((x) << 25) +#define FROM_DW2_RL(x) (((x) >> 25) & 0xf) +/* DW3 */ +#define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff) +#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff) +#define TO_DW3_NAKCOUNT(x) ((x) << 19) +#define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf) +#define TO_DW3_CERR(x) ((x) << 23) +#define FROM_DW3_CERR(x) (((x) >> 23) & 0x3) +#define TO_DW3_DATA_TOGGLE(x) ((x) << 25) +#define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1) +#define TO_DW3_PING(x) ((x) << 26) +#define FROM_DW3_PING(x) (((x) >> 26) & 0x1) +#define DW3_ERROR_BIT (1 << 28) +#define DW3_BABBLE_BIT (1 << 29) +#define DW3_HALT_BIT (1 << 30) +#define DW3_ACTIVE_BIT (1 << 31) +#define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01) + +#define INT_UNDERRUN (1 << 2) +#define INT_BABBLE (1 << 1) +#define INT_EXACT (1 << 0) + +#define SETUP_PID (2) +#define IN_PID (1) +#define OUT_PID (0) + +/* Errata 1 */ +#define RL_COUNTER (0) +#define NAK_COUNTER (0) +#define ERR_COUNTER (2) + +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 isp1760_read32(base, reg); +} + +static void reg_write32(void __iomem *base, u32 reg, u32 val) +{ + isp1760_write32(base, reg, val); +} + +/* + * 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) +{ + 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; + + return handshake(hcd, HC_USBCMD, CMD_RESET, 0, 250 * 1000); +} + +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; + int i; + + spin_lock_init(&priv->lock); + + for (i = 0; i < QH_END; i++) + INIT_LIST_HEAD(&priv->qh_list[i]); + + /* + * 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; + + 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; + } + + /* + * The RESET_HC bit in the SW_RESET register is supposed to reset the + * host controller without touching the CPU interface registers, but at + * least on the ISP1761 it seems to behave as the RESET_ALL bit and + * reset the whole device. We thus can't use it here, so let's reset + * the host controller through the EHCI USB Command register. The device + * has been reset in core code anyway, so this shouldn't matter. + */ + 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); + + result = ehci_reset(hcd); + if (result) + return result; + + /* Step 11 passed */ + + /* ATL reset */ + hwmode = reg_read32(hcd->regs, HC_HW_MODE_CTRL) & ~ALL_ATX_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); + + 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 isp1760_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 isp1760_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; + } + } +} + +static void schedule_ptds(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv; + struct isp1760_qh *qh, *qh_next; + struct list_head *ep_queue; + LIST_HEAD(urb_list); + struct urb_listitem *urb_listitem, *urb_listitem_next; + int i; + + if (!hcd) { + WARN_ON(1); + return; + } + + priv = hcd_to_priv(hcd); + + /* + * check finished/retired xfers, transfer payloads, call urb_done() + */ + for (i = 0; i < QH_END; i++) { + ep_queue = &priv->qh_list[i]; + list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) { + collect_qtds(hcd, qh, &urb_list); + if (list_empty(&qh->qtd_list)) + list_del(&qh->qh_list); + } + } + + 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! + */ + for (i = 0; i < QH_END; i++) { + ep_queue = &priv->qh_list[i]; + list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) + enqueue_qtds(hcd, qh); + } +} + +#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 isp1760_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; +static struct usb_hcd *errata2_timer_hcd; + +static void errata2_function(struct timer_list *unused) +{ + struct usb_hcd *hcd = errata2_timer_hcd; + 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 + + msecs_to_jiffies(SLOT_TIMEOUT))) { + 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 + msecs_to_jiffies(SLOT_CHECK_PERIOD); + 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; + + errata2_timer_hcd = hcd; + timer_setup(&errata2_timer, errata2_function, 0); + errata2_timer.expires = jiffies + msecs_to_jiffies(SLOT_CHECK_PERIOD); + 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->qh_list[QH_CONTROL]; + break; + case PIPE_BULK: + ep_queue = &priv->qh_list[QH_BULK]; + break; + case PIPE_INTERRUPT: + if (urb->interval < 0) + return -EINVAL; + /* FIXME: Check bandwidth */ + ep_queue = &priv->qh_list[QH_INTERRUPT]; + 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; + qtd_list_free(&new_qtds); + goto out; + } + retval = usb_hcd_link_urb_to_ep(hcd, urb); + if (retval) { + qtd_list_free(&new_qtds); + 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); + qtd_list_free(&new_qtds); + 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); + list_move(&qtd->qtd_list, &qh->qtd_list); + 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, *qh_iter; + int i; + + spin_lock_irqsave(&priv->lock, spinflags); + + qh = ep->hcpriv; + if (!qh) + goto out; + + WARN_ON(!list_empty(&qh->qtd_list)); + + for (i = 0; i < QH_END; i++) + list_for_each_entry(qh_iter, &priv->qh_list[i], qh_list) + if (qh_iter == qh) { + list_del(&qh_iter->qh_list); + i = QH_END; + break; + } + qh_free(qh); + ep->hcpriv = NULL; + + 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 !PM, 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 hub_wq 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 = USB_DT_HUB; + /* 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 = HUB_CHAR_INDV_PORT_OCPM; + if (HCS_PPC(priv->hcs_params)) + /* per-port power control */ + temp |= HUB_CHAR_INDV_PORT_LPSM; + else + /* no power switching */ + temp |= HUB_CHAR_NO_LPSM; + 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; + + /* + * 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, hub_wq 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(USB_RESUME_TIMEOUT); + } + 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 hub_wq + * 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: + 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); + msleep(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 isp1760_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 isp1760_deinit_kmem_cache(void) +{ + kmem_cache_destroy(qtd_cachep); + kmem_cache_destroy(qh_cachep); + kmem_cache_destroy(urb_listitem_cachep); +} + +int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs, + struct resource *mem, int irq, unsigned long irqflags, + struct device *dev) +{ + struct usb_hcd *hcd; + int ret; + + hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev)); + if (!hcd) + return -ENOMEM; + + *(struct isp1760_hcd **)hcd->hcd_priv = priv; + + priv->hcd = hcd; + + init_memory(priv); + + hcd->irq = irq; + hcd->regs = regs; + hcd->rsrc_start = mem->start; + hcd->rsrc_len = resource_size(mem); + + /* This driver doesn't support wakeup requests */ + hcd->cant_recv_wakeups = 1; + + ret = usb_add_hcd(hcd, irq, irqflags); + if (ret) + goto error; + + device_wakeup_enable(hcd->self.controller); + + return 0; + +error: + usb_put_hcd(hcd); + return ret; +} + +void isp1760_hcd_unregister(struct isp1760_hcd *priv) +{ + if (!priv->hcd) + return; + + usb_remove_hcd(priv->hcd); + usb_put_hcd(priv->hcd); +} |