diff options
Diffstat (limited to 'drivers/usb/host/isp1760-hcd.c')
| -rw-r--r-- | drivers/usb/host/isp1760-hcd.c | 2268 |
1 files changed, 0 insertions, 2268 deletions
diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c deleted file mode 100644 index 395649f357aa..000000000000 --- a/drivers/usb/host/isp1760-hcd.c +++ /dev/null @@ -1,2268 +0,0 @@ -/* - * 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/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/list.h> -#include <linux/usb.h> -#include <linux/usb/hcd.h> -#include <linux/debugfs.h> -#include <linux/uaccess.h> -#include <linux/io.h> -#include <linux/mm.h> -#include <linux/timer.h> -#include <asm/unaligned.h> -#include <asm/cacheflush.h> -#include <linux/gpio.h> - -#include "isp1760-hcd.h" - -static struct kmem_cache *qtd_cachep; -static struct kmem_cache *qh_cachep; -static struct kmem_cache *urb_listitem_cachep; - -enum queue_head_types { - QH_CONTROL, - QH_BULK, - QH_INTERRUPT, - QH_END -}; - -struct isp1760_hcd { - u32 hcs_params; - spinlock_t lock; - struct slotinfo atl_slots[32]; - int atl_done_map; - struct slotinfo int_slots[32]; - int int_done_map; - struct memory_chunk memory_pool[BLOCKS]; - struct list_head qh_list[QH_END]; - - /* periodic schedule support */ -#define DEFAULT_I_TDPS 1024 - unsigned periodic_size; - unsigned i_thresh; - unsigned long reset_done; - unsigned long next_statechange; - unsigned int devflags; - - int rst_gpio; -}; - -static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd) -{ - return (struct isp1760_hcd *) (hcd->hcd_priv); -} - -/* Section 2.2 Host Controller Capability Registers */ -#define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */ -#define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */ -#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */ -#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */ -#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */ -#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */ -#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */ - -/* Section 2.3 Host Controller Operational Registers */ -#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */ -#define CMD_RESET (1<<1) /* reset HC not bus */ -#define CMD_RUN (1<<0) /* start/stop HC */ -#define STS_PCD (1<<2) /* port change detect */ -#define FLAG_CF (1<<0) /* true: we'll support "high speed" */ - -#define PORT_OWNER (1<<13) /* true: companion hc owns this port */ -#define PORT_POWER (1<<12) /* true: has power (see PPC) */ -#define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */ -#define PORT_RESET (1<<8) /* reset port */ -#define PORT_SUSPEND (1<<7) /* suspend port */ -#define PORT_RESUME (1<<6) /* resume it */ -#define PORT_PE (1<<2) /* port enable */ -#define PORT_CSC (1<<1) /* connect status change */ -#define PORT_CONNECT (1<<0) /* device connected */ -#define PORT_RWC_BITS (PORT_CSC) - -struct isp1760_qtd { - u8 packet_type; - void *data_buffer; - u32 payload_addr; - - /* the rest is HCD-private */ - struct list_head qtd_list; - struct urb *urb; - size_t length; - size_t actual_length; - - /* QTD_ENQUEUED: waiting for transfer (inactive) */ - /* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */ - /* QTD_XFER_STARTED: valid ptd has been written to isp176x - only - interrupt handler may touch this qtd! */ - /* QTD_XFER_COMPLETE: payload has been transferred successfully */ - /* QTD_RETIRE: transfer error/abort qtd */ -#define QTD_ENQUEUED 0 -#define QTD_PAYLOAD_ALLOC 1 -#define QTD_XFER_STARTED 2 -#define QTD_XFER_COMPLETE 3 -#define QTD_RETIRE 4 - u32 status; -}; - -/* Queue head, one for each active endpoint */ -struct isp1760_qh { - struct list_head qh_list; - struct list_head qtd_list; - u32 toggle; - u32 ping; - int slot; - int tt_buffer_dirty; /* See USB2.0 spec section 11.17.5 */ -}; - -struct urb_listitem { - struct list_head urb_list; - struct urb *urb; -}; - -/* - * Access functions for isp176x registers (addresses 0..0x03FF). - */ -static u32 reg_read32(void __iomem *base, u32 reg) -{ - return readl(base + reg); -} - -static void reg_write32(void __iomem *base, u32 reg, u32 val) -{ - writel(val, base + reg); -} - -/* - * Access functions for isp176x memory (offset >= 0x0400). - * - * bank_reads8() reads memory locations prefetched by an earlier write to - * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi- - * bank optimizations, you should use the more generic mem_reads8() below. - * - * For access to ptd memory, use the specialized ptd_read() and ptd_write() - * below. - * - * These functions copy via MMIO data to/from the device. memcpy_{to|from}io() - * doesn't quite work because some people have to enforce 32-bit access - */ -static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr, - __u32 *dst, u32 bytes) -{ - __u32 __iomem *src; - u32 val; - __u8 *src_byteptr; - __u8 *dst_byteptr; - - src = src_base + (bank_addr | src_offset); - - if (src_offset < PAYLOAD_OFFSET) { - while (bytes >= 4) { - *dst = le32_to_cpu(__raw_readl(src)); - bytes -= 4; - src++; - dst++; - } - } else { - while (bytes >= 4) { - *dst = __raw_readl(src); - bytes -= 4; - src++; - dst++; - } - } - - if (!bytes) - return; - - /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully - * allocated. - */ - if (src_offset < PAYLOAD_OFFSET) - val = le32_to_cpu(__raw_readl(src)); - else - val = __raw_readl(src); - - dst_byteptr = (void *) dst; - src_byteptr = (void *) &val; - while (bytes > 0) { - *dst_byteptr = *src_byteptr; - dst_byteptr++; - src_byteptr++; - bytes--; - } -} - -static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst, - u32 bytes) -{ - reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0)); - ndelay(90); - bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes); -} - -static void mem_writes8(void __iomem *dst_base, u32 dst_offset, - __u32 const *src, u32 bytes) -{ - __u32 __iomem *dst; - - dst = dst_base + dst_offset; - - if (dst_offset < PAYLOAD_OFFSET) { - while (bytes >= 4) { - __raw_writel(cpu_to_le32(*src), dst); - bytes -= 4; - src++; - dst++; - } - } else { - while (bytes >= 4) { - __raw_writel(*src, dst); - bytes -= 4; - src++; - dst++; - } - } - - if (!bytes) - return; - /* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the - * extra bytes should not be read by the HW. - */ - - if (dst_offset < PAYLOAD_OFFSET) - __raw_writel(cpu_to_le32(*src), dst); - else - __raw_writel(*src, dst); -} - -/* - * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET, - * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32. - */ -static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot, - struct ptd *ptd) -{ - reg_write32(base, HC_MEMORY_REG, - ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd)); - ndelay(90); - bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0), - (void *) ptd, sizeof(*ptd)); -} - -static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot, - struct ptd *ptd) -{ - mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0), - &ptd->dw1, 7*sizeof(ptd->dw1)); - /* Make sure dw0 gets written last (after other dw's and after payload) - since it contains the enable bit */ - wmb(); - mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0, - sizeof(ptd->dw0)); -} - - -/* memory management of the 60kb on the chip from 0x1000 to 0xffff */ -static void init_memory(struct isp1760_hcd *priv) -{ - int i, curr; - u32 payload_addr; - - payload_addr = PAYLOAD_OFFSET; - for (i = 0; i < BLOCK_1_NUM; i++) { - priv->memory_pool[i].start = payload_addr; - priv->memory_pool[i].size = BLOCK_1_SIZE; - priv->memory_pool[i].free = 1; - payload_addr += priv->memory_pool[i].size; - } - - curr = i; - for (i = 0; i < BLOCK_2_NUM; i++) { - priv->memory_pool[curr + i].start = payload_addr; - priv->memory_pool[curr + i].size = BLOCK_2_SIZE; - priv->memory_pool[curr + i].free = 1; - payload_addr += priv->memory_pool[curr + i].size; - } - - curr = i; - for (i = 0; i < BLOCK_3_NUM; i++) { - priv->memory_pool[curr + i].start = payload_addr; - priv->memory_pool[curr + i].size = BLOCK_3_SIZE; - priv->memory_pool[curr + i].free = 1; - payload_addr += priv->memory_pool[curr + i].size; - } - - WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE); -} - -static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int i; - - WARN_ON(qtd->payload_addr); - - if (!qtd->length) - return; - - for (i = 0; i < BLOCKS; i++) { - if (priv->memory_pool[i].size >= qtd->length && - priv->memory_pool[i].free) { - priv->memory_pool[i].free = 0; - qtd->payload_addr = priv->memory_pool[i].start; - return; - } - } -} - -static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int i; - - if (!qtd->payload_addr) - return; - - for (i = 0; i < BLOCKS; i++) { - if (priv->memory_pool[i].start == qtd->payload_addr) { - WARN_ON(priv->memory_pool[i].free); - priv->memory_pool[i].free = 1; - qtd->payload_addr = 0; - return; - } - } - - dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n", - __func__, qtd->payload_addr); - WARN_ON(1); - qtd->payload_addr = 0; -} - -static int handshake(struct usb_hcd *hcd, u32 reg, - u32 mask, u32 done, int usec) -{ - u32 result; - - do { - result = reg_read32(hcd->regs, reg); - if (result == ~0) - return -ENODEV; - result &= mask; - if (result == done) - return 0; - udelay(1); - usec--; - } while (usec > 0); - return -ETIMEDOUT; -} - -/* reset a non-running (STS_HALT == 1) controller */ -static int ehci_reset(struct usb_hcd *hcd) -{ - int retval; - struct isp1760_hcd *priv = hcd_to_priv(hcd); - - u32 command = reg_read32(hcd->regs, HC_USBCMD); - - command |= CMD_RESET; - reg_write32(hcd->regs, HC_USBCMD, command); - hcd->state = HC_STATE_HALT; - priv->next_statechange = jiffies; - retval = handshake(hcd, HC_USBCMD, - CMD_RESET, 0, 250 * 1000); - return retval; -} - -static struct isp1760_qh *qh_alloc(gfp_t flags) -{ - struct isp1760_qh *qh; - - qh = kmem_cache_zalloc(qh_cachep, flags); - if (!qh) - return NULL; - - INIT_LIST_HEAD(&qh->qh_list); - INIT_LIST_HEAD(&qh->qtd_list); - qh->slot = -1; - - return qh; -} - -static void qh_free(struct isp1760_qh *qh) -{ - WARN_ON(!list_empty(&qh->qtd_list)); - WARN_ON(qh->slot > -1); - kmem_cache_free(qh_cachep, qh); -} - -/* one-time init, only for memory state */ -static int priv_init(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 hcc_params; - 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; - - /* low-level chip reset */ - if (gpio_is_valid(priv->rst_gpio)) { - unsigned int rst_lvl; - - rst_lvl = (priv->devflags & - ISP1760_FLAG_RESET_ACTIVE_HIGH) ? 1 : 0; - - gpio_set_value(priv->rst_gpio, rst_lvl); - mdelay(50); - gpio_set_value(priv->rst_gpio, !rst_lvl); - } - - /* Setup HW Mode Control: This assumes a level active-low interrupt */ - hwmode = HW_DATA_BUS_32BIT; - - if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) - hwmode &= ~HW_DATA_BUS_32BIT; - if (priv->devflags & ISP1760_FLAG_ANALOG_OC) - hwmode |= HW_ANA_DIGI_OC; - if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH) - hwmode |= HW_DACK_POL_HIGH; - if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH) - hwmode |= HW_DREQ_POL_HIGH; - if (priv->devflags & ISP1760_FLAG_INTR_POL_HIGH) - hwmode |= HW_INTR_HIGH_ACT; - if (priv->devflags & ISP1760_FLAG_INTR_EDGE_TRIG) - hwmode |= HW_INTR_EDGE_TRIG; - - /* - * We have to set this first in case we're in 16-bit mode. - * Write it twice to ensure correct upper bits if switching - * to 16-bit mode. - */ - reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode); - - reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe); - /* Change bus pattern */ - scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG); - scratch = reg_read32(hcd->regs, HC_SCRATCH_REG); - if (scratch != 0xdeadbabe) { - dev_err(hcd->self.controller, "Scratch test failed.\n"); - return -ENODEV; - } - - /* pre reset */ - reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - - /* reset */ - reg_write32(hcd->regs, HC_RESET_REG, SW_RESET_RESET_ALL); - mdelay(100); - - reg_write32(hcd->regs, HC_RESET_REG, SW_RESET_RESET_HC); - mdelay(100); - - result = ehci_reset(hcd); - if (result) - return result; - - /* Step 11 passed */ - - dev_info(hcd->self.controller, "bus width: %d, oc: %s\n", - (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ? - 16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ? - "analog" : "digital"); - - /* ATL reset */ - reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET); - mdelay(10); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode); - - reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK); - - /* - * PORT 1 Control register of the ISP1760 is the OTG control - * register on ISP1761. Since there is no OTG or device controller - * support in this driver, we use port 1 as a "normal" USB host port on - * both chips. - */ - reg_write32(hcd->regs, HC_PORT1_CTRL, PORT1_POWER | PORT1_INIT2); - mdelay(10); - - priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS); - - return priv_init(hcd); -} - -static u32 base_to_chip(u32 base) -{ - return ((base - 0x400) >> 3); -} - -static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh) -{ - struct urb *urb; - - if (list_is_last(&qtd->qtd_list, &qh->qtd_list)) - return 1; - - urb = qtd->urb; - qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list); - return (qtd->urb != urb); -} - -/* magic numbers that can affect system performance */ -#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ -#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ -#define EHCI_TUNE_RL_TT 0 -#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ -#define EHCI_TUNE_MULT_TT 1 -#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ - -static void create_ptd_atl(struct isp1760_qh *qh, - struct isp1760_qtd *qtd, struct ptd *ptd) -{ - u32 maxpacket; - u32 multi; - u32 rl = RL_COUNTER; - u32 nak = NAK_COUNTER; - - memset(ptd, 0, sizeof(*ptd)); - - /* according to 3.6.2, max packet len can not be > 0x400 */ - maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe, - usb_pipeout(qtd->urb->pipe)); - multi = 1 + ((maxpacket >> 11) & 0x3); - maxpacket &= 0x7ff; - - /* DW0 */ - ptd->dw0 = DW0_VALID_BIT; - ptd->dw0 |= TO_DW0_LENGTH(qtd->length); - ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket); - ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe)); - - /* DW1 */ - ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1; - ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe)); - ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type); - - if (usb_pipebulk(qtd->urb->pipe)) - ptd->dw1 |= DW1_TRANS_BULK; - else if (usb_pipeint(qtd->urb->pipe)) - ptd->dw1 |= DW1_TRANS_INT; - - if (qtd->urb->dev->speed != USB_SPEED_HIGH) { - /* split transaction */ - - ptd->dw1 |= DW1_TRANS_SPLIT; - if (qtd->urb->dev->speed == USB_SPEED_LOW) - ptd->dw1 |= DW1_SE_USB_LOSPEED; - - ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport); - ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum); - - /* SE bit for Split INT transfers */ - if (usb_pipeint(qtd->urb->pipe) && - (qtd->urb->dev->speed == USB_SPEED_LOW)) - ptd->dw1 |= 2 << 16; - - rl = 0; - nak = 0; - } else { - ptd->dw0 |= TO_DW0_MULTI(multi); - if (usb_pipecontrol(qtd->urb->pipe) || - usb_pipebulk(qtd->urb->pipe)) - ptd->dw3 |= TO_DW3_PING(qh->ping); - } - /* DW2 */ - ptd->dw2 = 0; - ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr)); - ptd->dw2 |= TO_DW2_RL(rl); - - /* DW3 */ - ptd->dw3 |= TO_DW3_NAKCOUNT(nak); - ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle); - if (usb_pipecontrol(qtd->urb->pipe)) { - if (qtd->data_buffer == qtd->urb->setup_packet) - ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1); - else if (last_qtd_of_urb(qtd, qh)) - ptd->dw3 |= TO_DW3_DATA_TOGGLE(1); - } - - ptd->dw3 |= DW3_ACTIVE_BIT; - /* Cerr */ - ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER); -} - -static void transform_add_int(struct isp1760_qh *qh, - struct isp1760_qtd *qtd, struct ptd *ptd) -{ - u32 usof; - u32 period; - - /* - * Most of this is guessing. ISP1761 datasheet is quite unclear, and - * the algorithm from the original Philips driver code, which was - * pretty much used in this driver before as well, is quite horrendous - * and, i believe, incorrect. The code below follows the datasheet and - * USB2.0 spec as far as I can tell, and plug/unplug seems to be much - * more reliable this way (fingers crossed...). - */ - - if (qtd->urb->dev->speed == USB_SPEED_HIGH) { - /* urb->interval is in units of microframes (1/8 ms) */ - period = qtd->urb->interval >> 3; - - if (qtd->urb->interval > 4) - usof = 0x01; /* One bit set => - interval 1 ms * uFrame-match */ - else if (qtd->urb->interval > 2) - usof = 0x22; /* Two bits set => interval 1/2 ms */ - else if (qtd->urb->interval > 1) - usof = 0x55; /* Four bits set => interval 1/4 ms */ - else - usof = 0xff; /* All bits set => interval 1/8 ms */ - } else { - /* urb->interval is in units of frames (1 ms) */ - period = qtd->urb->interval; - usof = 0x0f; /* Execute Start Split on any of the - four first uFrames */ - - /* - * First 8 bits in dw5 is uSCS and "specifies which uSOF the - * complete split needs to be sent. Valid only for IN." Also, - * "All bits can be set to one for every transfer." (p 82, - * ISP1761 data sheet.) 0x1c is from Philips driver. Where did - * that number come from? 0xff seems to work fine... - */ - /* ptd->dw5 = 0x1c; */ - ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */ - } - - period = period >> 1;/* Ensure equal or shorter period than requested */ - period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */ - - ptd->dw2 |= period; - ptd->dw4 = usof; -} - -static void create_ptd_int(struct isp1760_qh *qh, - struct isp1760_qtd *qtd, struct ptd *ptd) -{ - create_ptd_atl(qh, qtd, ptd); - transform_add_int(qh, qtd, ptd); -} - -static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb) -__releases(priv->lock) -__acquires(priv->lock) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - - if (!urb->unlinked) { - if (urb->status == -EINPROGRESS) - urb->status = 0; - } - - if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) { - void *ptr; - for (ptr = urb->transfer_buffer; - ptr < urb->transfer_buffer + urb->transfer_buffer_length; - ptr += PAGE_SIZE) - flush_dcache_page(virt_to_page(ptr)); - } - - /* complete() can reenter this HCD */ - usb_hcd_unlink_urb_from_ep(hcd, urb); - spin_unlock(&priv->lock); - usb_hcd_giveback_urb(hcd, urb, urb->status); - spin_lock(&priv->lock); -} - -static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb, - u8 packet_type) -{ - struct isp1760_qtd *qtd; - - qtd = kmem_cache_zalloc(qtd_cachep, flags); - if (!qtd) - return NULL; - - INIT_LIST_HEAD(&qtd->qtd_list); - qtd->urb = urb; - qtd->packet_type = packet_type; - qtd->status = QTD_ENQUEUED; - qtd->actual_length = 0; - - return qtd; -} - -static void qtd_free(struct isp1760_qtd *qtd) -{ - WARN_ON(qtd->payload_addr); - kmem_cache_free(qtd_cachep, qtd); -} - -static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot, - struct slotinfo *slots, struct isp1760_qtd *qtd, - struct isp1760_qh *qh, struct ptd *ptd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int skip_map; - - WARN_ON((slot < 0) || (slot > 31)); - WARN_ON(qtd->length && !qtd->payload_addr); - WARN_ON(slots[slot].qtd); - WARN_ON(slots[slot].qh); - WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC); - - /* Make sure done map has not triggered from some unlinked transfer */ - if (ptd_offset == ATL_PTD_OFFSET) { - priv->atl_done_map |= reg_read32(hcd->regs, - HC_ATL_PTD_DONEMAP_REG); - priv->atl_done_map &= ~(1 << slot); - } else { - priv->int_done_map |= reg_read32(hcd->regs, - HC_INT_PTD_DONEMAP_REG); - priv->int_done_map &= ~(1 << slot); - } - - qh->slot = slot; - qtd->status = QTD_XFER_STARTED; - slots[slot].timestamp = jiffies; - slots[slot].qtd = qtd; - slots[slot].qh = qh; - ptd_write(hcd->regs, ptd_offset, slot, ptd); - - if (ptd_offset == ATL_PTD_OFFSET) { - skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); - skip_map &= ~(1 << qh->slot); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); - } else { - skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); - skip_map &= ~(1 << qh->slot); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); - } -} - -static int is_short_bulk(struct isp1760_qtd *qtd) -{ - return (usb_pipebulk(qtd->urb->pipe) && - (qtd->actual_length < qtd->length)); -} - -static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh, - struct list_head *urb_list) -{ - int last_qtd; - struct isp1760_qtd *qtd, *qtd_next; - struct urb_listitem *urb_listitem; - - list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) { - if (qtd->status < QTD_XFER_COMPLETE) - break; - - last_qtd = last_qtd_of_urb(qtd, qh); - - if ((!last_qtd) && (qtd->status == QTD_RETIRE)) - qtd_next->status = QTD_RETIRE; - - if (qtd->status == QTD_XFER_COMPLETE) { - if (qtd->actual_length) { - switch (qtd->packet_type) { - case IN_PID: - mem_reads8(hcd->regs, qtd->payload_addr, - qtd->data_buffer, - qtd->actual_length); - /* Fall through (?) */ - case OUT_PID: - qtd->urb->actual_length += - qtd->actual_length; - /* Fall through ... */ - case SETUP_PID: - break; - } - } - - if (is_short_bulk(qtd)) { - if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) - qtd->urb->status = -EREMOTEIO; - if (!last_qtd) - qtd_next->status = QTD_RETIRE; - } - } - - if (qtd->payload_addr) - free_mem(hcd, qtd); - - if (last_qtd) { - if ((qtd->status == QTD_RETIRE) && - (qtd->urb->status == -EINPROGRESS)) - qtd->urb->status = -EPIPE; - /* Defer calling of urb_done() since it releases lock */ - urb_listitem = kmem_cache_zalloc(urb_listitem_cachep, - GFP_ATOMIC); - if (unlikely(!urb_listitem)) - break; /* Try again on next call */ - urb_listitem->urb = qtd->urb; - list_add_tail(&urb_listitem->urb_list, urb_list); - } - - list_del(&qtd->qtd_list); - qtd_free(qtd); - } -} - -#define ENQUEUE_DEPTH 2 -static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int ptd_offset; - struct slotinfo *slots; - int curr_slot, free_slot; - int n; - struct ptd ptd; - struct isp1760_qtd *qtd; - - if (unlikely(list_empty(&qh->qtd_list))) { - WARN_ON(1); - return; - } - - /* Make sure this endpoint's TT buffer is clean before queueing ptds */ - if (qh->tt_buffer_dirty) - return; - - if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd, - qtd_list)->urb->pipe)) { - ptd_offset = INT_PTD_OFFSET; - slots = priv->int_slots; - } else { - ptd_offset = ATL_PTD_OFFSET; - slots = priv->atl_slots; - } - - free_slot = -1; - for (curr_slot = 0; curr_slot < 32; curr_slot++) { - if ((free_slot == -1) && (slots[curr_slot].qtd == NULL)) - free_slot = curr_slot; - if (slots[curr_slot].qh == qh) - break; - } - - n = 0; - list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { - if (qtd->status == QTD_ENQUEUED) { - WARN_ON(qtd->payload_addr); - alloc_mem(hcd, qtd); - if ((qtd->length) && (!qtd->payload_addr)) - break; - - if ((qtd->length) && - ((qtd->packet_type == SETUP_PID) || - (qtd->packet_type == OUT_PID))) { - mem_writes8(hcd->regs, qtd->payload_addr, - qtd->data_buffer, qtd->length); - } - - qtd->status = QTD_PAYLOAD_ALLOC; - } - - if (qtd->status == QTD_PAYLOAD_ALLOC) { -/* - if ((curr_slot > 31) && (free_slot == -1)) - dev_dbg(hcd->self.controller, "%s: No slot " - "available for transfer\n", __func__); -*/ - /* Start xfer for this endpoint if not already done */ - if ((curr_slot > 31) && (free_slot > -1)) { - if (usb_pipeint(qtd->urb->pipe)) - create_ptd_int(qh, qtd, &ptd); - else - create_ptd_atl(qh, qtd, &ptd); - - start_bus_transfer(hcd, ptd_offset, free_slot, - slots, qtd, qh, &ptd); - curr_slot = free_slot; - } - - n++; - if (n >= ENQUEUE_DEPTH) - break; - } - } -} - -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 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 void errata2_function(unsigned long data) -{ - struct usb_hcd *hcd = (struct usb_hcd *) data; - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int slot; - struct ptd ptd; - unsigned long spinflags; - - spin_lock_irqsave(&priv->lock, spinflags); - - for (slot = 0; slot < 32; slot++) - if (priv->atl_slots[slot].qh && time_after(jiffies, - priv->atl_slots[slot].timestamp + - SLOT_TIMEOUT * HZ / 1000)) { - ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); - if (!FROM_DW0_VALID(ptd.dw0) && - !FROM_DW3_ACTIVE(ptd.dw3)) - priv->atl_done_map |= 1 << slot; - } - - if (priv->atl_done_map) - handle_done_ptds(hcd); - - spin_unlock_irqrestore(&priv->lock, spinflags); - - errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; - add_timer(&errata2_timer); -} - -static int isp1760_run(struct usb_hcd *hcd) -{ - int retval; - u32 temp; - u32 command; - u32 chipid; - - hcd->uses_new_polling = 1; - - hcd->state = HC_STATE_RUNNING; - - /* Set PTD interrupt AND & OR maps */ - reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0); - reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0xffffffff); - reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0); - reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0xffffffff); - reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0); - reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff); - /* step 23 passed */ - - temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN); - - command = reg_read32(hcd->regs, HC_USBCMD); - command &= ~(CMD_LRESET|CMD_RESET); - command |= CMD_RUN; - reg_write32(hcd->regs, HC_USBCMD, command); - - retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, 250 * 1000); - if (retval) - return retval; - - /* - * XXX - * Spec says to write FLAG_CF as last config action, priv code grabs - * the semaphore while doing so. - */ - down_write(&ehci_cf_port_reset_rwsem); - reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF); - - retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000); - up_write(&ehci_cf_port_reset_rwsem); - if (retval) - return retval; - - init_timer(&errata2_timer); - errata2_timer.function = errata2_function; - errata2_timer.data = (unsigned long) hcd; - errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000; - add_timer(&errata2_timer); - - chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG); - dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n", - chipid & 0xffff, chipid >> 16); - - /* PTD Register Init Part 2, Step 28 */ - - /* Setup registers controlling PTD checking */ - reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000); - reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000); - reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0xffffffff); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0xffffffff); - reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0xffffffff); - reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, - ATL_BUF_FILL | INT_BUF_FILL); - - /* GRR this is run-once init(), being done every time the HC starts. - * So long as they're part of class devices, we can't do it init() - * since the class device isn't created that early. - */ - return 0; -} - -static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len) -{ - qtd->data_buffer = databuffer; - - if (len > MAX_PAYLOAD_SIZE) - len = MAX_PAYLOAD_SIZE; - qtd->length = len; - - return qtd->length; -} - -static void qtd_list_free(struct list_head *qtd_list) -{ - struct isp1760_qtd *qtd, *qtd_next; - - list_for_each_entry_safe(qtd, qtd_next, qtd_list, qtd_list) { - list_del(&qtd->qtd_list); - qtd_free(qtd); - } -} - -/* - * Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize. - * Also calculate the PID type (SETUP/IN/OUT) for each packet. - */ -#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff) -static void packetize_urb(struct usb_hcd *hcd, - struct urb *urb, struct list_head *head, gfp_t flags) -{ - struct isp1760_qtd *qtd; - void *buf; - int len, maxpacketsize; - u8 packet_type; - - /* - * URBs map to sequences of QTDs: one logical transaction - */ - - if (!urb->transfer_buffer && urb->transfer_buffer_length) { - /* XXX This looks like usb storage / SCSI bug */ - dev_err(hcd->self.controller, - "buf is null, dma is %08lx len is %d\n", - (long unsigned)urb->transfer_dma, - urb->transfer_buffer_length); - WARN_ON(1); - } - - if (usb_pipein(urb->pipe)) - packet_type = IN_PID; - else - packet_type = OUT_PID; - - if (usb_pipecontrol(urb->pipe)) { - qtd = qtd_alloc(flags, urb, SETUP_PID); - if (!qtd) - goto cleanup; - qtd_fill(qtd, urb->setup_packet, sizeof(struct usb_ctrlrequest)); - list_add_tail(&qtd->qtd_list, head); - - /* for zero length DATA stages, STATUS is always IN */ - if (urb->transfer_buffer_length == 0) - packet_type = IN_PID; - } - - maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe, - usb_pipeout(urb->pipe))); - - /* - * buffer gets wrapped in one or more qtds; - * last one may be "short" (including zero len) - * and may serve as a control status ack - */ - buf = urb->transfer_buffer; - len = urb->transfer_buffer_length; - - for (;;) { - int this_qtd_len; - - qtd = qtd_alloc(flags, urb, packet_type); - if (!qtd) - goto cleanup; - this_qtd_len = qtd_fill(qtd, buf, len); - list_add_tail(&qtd->qtd_list, head); - - len -= this_qtd_len; - buf += this_qtd_len; - - if (len <= 0) - break; - } - - /* - * control requests may need a terminating data "status" ack; - * bulk ones may need a terminating short packet (zero length). - */ - if (urb->transfer_buffer_length != 0) { - int one_more = 0; - - if (usb_pipecontrol(urb->pipe)) { - one_more = 1; - if (packet_type == IN_PID) - packet_type = OUT_PID; - else - packet_type = IN_PID; - } else if (usb_pipebulk(urb->pipe) - && (urb->transfer_flags & URB_ZERO_PACKET) - && !(urb->transfer_buffer_length % - maxpacketsize)) { - one_more = 1; - } - if (one_more) { - qtd = qtd_alloc(flags, urb, packet_type); - if (!qtd) - goto cleanup; - - /* never any data in such packets */ - qtd_fill(qtd, NULL, 0); - list_add_tail(&qtd->qtd_list, head); - } - } - - return; - -cleanup: - qtd_list_free(head); -} - -static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, - gfp_t mem_flags) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct list_head *ep_queue; - struct isp1760_qh *qh, *qhit; - unsigned long spinflags; - LIST_HEAD(new_qtds); - int retval; - int qh_in_queue; - - switch (usb_pipetype(urb->pipe)) { - case PIPE_CONTROL: - ep_queue = &priv->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 = 0x29; - /* priv 1.0, 2.3.9 says 20ms max */ - desc->bPwrOn2PwrGood = 10; - desc->bHubContrCurrent = 0; - - desc->bNbrPorts = ports; - temp = 1 + (ports / 8); - desc->bDescLength = 7 + 2 * temp; - - /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ - memset(&desc->u.hs.DeviceRemovable[0], 0, temp); - memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); - - /* per-port overcurrent reporting */ - temp = 0x0008; - if (HCS_PPC(priv->hcs_params)) - /* per-port power control */ - temp |= 0x0001; - else - /* no power switching */ - temp |= 0x0002; - desc->wHubCharacteristics = cpu_to_le16(temp); -} - -#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) - -static int check_reset_complete(struct usb_hcd *hcd, int index, - int port_status) -{ - if (!(port_status & PORT_CONNECT)) - return port_status; - - /* if reset finished and it's still not enabled -- handoff */ - if (!(port_status & PORT_PE)) { - - dev_info(hcd->self.controller, - "port %d full speed --> companion\n", - index + 1); - - port_status |= PORT_OWNER; - port_status &= ~PORT_RWC_BITS; - reg_write32(hcd->regs, HC_PORTSC1, port_status); - - } else - dev_info(hcd->self.controller, "port %d high speed\n", - index + 1); - - return port_status; -} - -static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq, - u16 wValue, u16 wIndex, char *buf, u16 wLength) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - int ports = HCS_N_PORTS(priv->hcs_params); - u32 temp, status; - unsigned long flags; - int retval = 0; - unsigned selector; - - /* - * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. - * HCS_INDICATOR may say we can change LEDs to off/amber/green. - * (track current state ourselves) ... blink for diagnostics, - * power, "this is the one", etc. EHCI spec supports this. - */ - - spin_lock_irqsave(&priv->lock, flags); - switch (typeReq) { - case ClearHubFeature: - switch (wValue) { - case C_HUB_LOCAL_POWER: - case C_HUB_OVER_CURRENT: - /* no hub-wide feature/status flags */ - break; - default: - goto error; - } - break; - case ClearPortFeature: - if (!wIndex || wIndex > ports) - goto error; - wIndex--; - temp = reg_read32(hcd->regs, HC_PORTSC1); - - /* - * Even if OWNER is set, so the port is owned by the - * companion controller, 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(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 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: - selector = wIndex >> 8; - wIndex &= 0xff; - if (!wIndex || wIndex > ports) - goto error; - wIndex--; - temp = reg_read32(hcd->regs, HC_PORTSC1); - if (temp & PORT_OWNER) - break; - -/* temp &= ~PORT_RWC_BITS; */ - switch (wValue) { - case USB_PORT_FEAT_ENABLE: - reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE); - break; - - case USB_PORT_FEAT_SUSPEND: - if ((temp & PORT_PE) == 0 - || (temp & PORT_RESET) != 0) - goto error; - - reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND); - break; - case USB_PORT_FEAT_POWER: - if (HCS_PPC(priv->hcs_params)) - reg_write32(hcd->regs, HC_PORTSC1, - temp | PORT_POWER); - break; - case USB_PORT_FEAT_RESET: - if (temp & PORT_RESUME) - goto error; - /* line status bits may report this as low speed, - * which can be fine if this root hub has a - * transaction translator built in. - */ - if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT - && PORT_USB11(temp)) { - temp |= PORT_OWNER; - } else { - temp |= PORT_RESET; - temp &= ~PORT_PE; - - /* - * caller must wait, then call GetPortStatus - * usb 2.0 spec says 50 ms resets on root - */ - priv->reset_done = jiffies + - msecs_to_jiffies(50); - } - reg_write32(hcd->regs, HC_PORTSC1, temp); - break; - default: - goto error; - } - reg_read32(hcd->regs, HC_USBCMD); - break; - - default: -error: - /* "stall" on error */ - retval = -EPIPE; - } - spin_unlock_irqrestore(&priv->lock, flags); - return retval; -} - -static int isp1760_get_frame(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 fr; - - fr = reg_read32(hcd->regs, HC_FRINDEX); - return (fr >> 3) % priv->periodic_size; -} - -static void isp1760_stop(struct usb_hcd *hcd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 temp; - - del_timer(&errata2_timer); - - isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1, - NULL, 0); - mdelay(20); - - spin_lock_irq(&priv->lock); - ehci_reset(hcd); - /* Disable IRQ */ - temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); - spin_unlock_irq(&priv->lock); - - reg_write32(hcd->regs, HC_CONFIGFLAG, 0); -} - -static void isp1760_shutdown(struct usb_hcd *hcd) -{ - u32 command, temp; - - isp1760_stop(hcd); - temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL); - reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN); - - command = reg_read32(hcd->regs, HC_USBCMD); - command &= ~CMD_RUN; - reg_write32(hcd->regs, HC_USBCMD, command); -} - -static void isp1760_clear_tt_buffer_complete(struct usb_hcd *hcd, - struct usb_host_endpoint *ep) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct isp1760_qh *qh = ep->hcpriv; - unsigned long spinflags; - - if (!qh) - return; - - spin_lock_irqsave(&priv->lock, spinflags); - qh->tt_buffer_dirty = 0; - schedule_ptds(hcd); - spin_unlock_irqrestore(&priv->lock, spinflags); -} - - -static const struct hc_driver isp1760_hc_driver = { - .description = "isp1760-hcd", - .product_desc = "NXP ISP1760 USB Host Controller", - .hcd_priv_size = sizeof(struct isp1760_hcd), - .irq = isp1760_irq, - .flags = HCD_MEMORY | HCD_USB2, - .reset = isp1760_hc_setup, - .start = isp1760_run, - .stop = isp1760_stop, - .shutdown = isp1760_shutdown, - .urb_enqueue = isp1760_urb_enqueue, - .urb_dequeue = isp1760_urb_dequeue, - .endpoint_disable = isp1760_endpoint_disable, - .get_frame_number = isp1760_get_frame, - .hub_status_data = isp1760_hub_status_data, - .hub_control = isp1760_hub_control, - .clear_tt_buffer_complete = isp1760_clear_tt_buffer_complete, -}; - -int __init init_kmem_once(void) -{ - urb_listitem_cachep = kmem_cache_create("isp1760_urb_listitem", - sizeof(struct urb_listitem), 0, SLAB_TEMPORARY | - SLAB_MEM_SPREAD, NULL); - - if (!urb_listitem_cachep) - return -ENOMEM; - - qtd_cachep = kmem_cache_create("isp1760_qtd", - sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY | - SLAB_MEM_SPREAD, NULL); - - if (!qtd_cachep) - return -ENOMEM; - - qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh), - 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL); - - if (!qh_cachep) { - kmem_cache_destroy(qtd_cachep); - return -ENOMEM; - } - - return 0; -} - -void deinit_kmem_cache(void) -{ - kmem_cache_destroy(qtd_cachep); - kmem_cache_destroy(qh_cachep); - kmem_cache_destroy(urb_listitem_cachep); -} - -struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len, - int irq, unsigned long irqflags, - int rst_gpio, - struct device *dev, const char *busname, - unsigned int devflags) -{ - struct usb_hcd *hcd; - struct isp1760_hcd *priv; - int ret; - - if (usb_disabled()) - return ERR_PTR(-ENODEV); - - /* prevent usb-core allocating DMA pages */ - dev->dma_mask = NULL; - - hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev)); - if (!hcd) - return ERR_PTR(-ENOMEM); - - priv = hcd_to_priv(hcd); - priv->devflags = devflags; - priv->rst_gpio = rst_gpio; - init_memory(priv); - hcd->regs = ioremap(res_start, res_len); - if (!hcd->regs) { - ret = -EIO; - goto err_put; - } - - hcd->irq = irq; - hcd->rsrc_start = res_start; - hcd->rsrc_len = res_len; - - ret = usb_add_hcd(hcd, irq, irqflags); - if (ret) - goto err_unmap; - device_wakeup_enable(hcd->self.controller); - - 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"); |