![Linus Torvalds](/assets/img/avatar_default.png)
Here is the big set of USB and PHY driver updates for 4.15-rc1. There is the usual amount of gadget and xhci driver updates, along with phy and chipidea enhancements. There's also a lot of SPDX tags and license boilerplate cleanups as well, which provide some churn in the diffstat. Other major thing is the typec code that moved out of staging and into the "real" part of the drivers/usb/ tree, which was nice to see happen. All of these have been in linux-next with no reported issues for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWgm/Vw8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+yktXwCdGgpInfOEvOGFd83EPDL7a1ncyc4AoM5wI8yl 1CeLipqVIN3IsMMJptvb =zvDI -----END PGP SIGNATURE----- Merge tag 'usb-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB/PHY updates from Greg KH: "Here is the big set of USB and PHY driver updates for 4.15-rc1. There is the usual amount of gadget and xhci driver updates, along with phy and chipidea enhancements. There's also a lot of SPDX tags and license boilerplate cleanups as well, which provide some churn in the diffstat. Other major thing is the typec code that moved out of staging and into the "real" part of the drivers/usb/ tree, which was nice to see happen. All of these have been in linux-next with no reported issues for a while" * tag 'usb-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (263 commits) usb: gadget: f_fs: Fix use-after-free in ffs_free_inst USB: usbfs: compute urb->actual_length for isochronous usb: core: message: remember to reset 'ret' to 0 when necessary USB: typec: Remove remaining redundant license text USB: typec: add SPDX identifiers to some files USB: renesas_usbhs: rcar?.h: add SPDX tags USB: chipidea: ci_hdrc_tegra.c: add SPDX line USB: host: xhci-debugfs: add SPDX lines USB: add SPDX identifiers to all remaining Makefiles usb: host: isp1362-hcd: remove a couple of redundant assignments USB: adutux: remove redundant variable minor usb: core: add a new usb_get_ptm_status() helper usb: core: add a 'type' parameter to usb_get_status() usb: core: introduce a new usb_get_std_status() helper usb: core: rename usb_get_status() 'type' argument to 'recip' usb: core: add Status Type definitions USB: gadget: Remove redundant license text USB: gadget: function: Remove redundant license text USB: gadget: udc: Remove redundant license text USB: gadget: legacy: Remove redundant license text ...
2237 lines
56 KiB
C
2237 lines
56 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Driver for the NXP ISP1760 chip
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*
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* However, the code might contain some bugs. What doesn't work for sure is:
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* - ISO
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* - OTG
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e The interrupt line is configured as active low, level.
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*
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* (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
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*
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* (c) 2011 Arvid Brodin <arvid.brodin@enea.com>
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*
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*/
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/timer.h>
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#include <asm/unaligned.h>
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#include <asm/cacheflush.h>
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#include "isp1760-core.h"
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#include "isp1760-hcd.h"
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#include "isp1760-regs.h"
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static struct kmem_cache *qtd_cachep;
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static struct kmem_cache *qh_cachep;
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static struct kmem_cache *urb_listitem_cachep;
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typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh,
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struct isp1760_qtd *qtd);
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static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
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{
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return *(struct isp1760_hcd **)hcd->hcd_priv;
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}
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/* urb state*/
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#define DELETE_URB (0x0008)
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#define NO_TRANSFER_ACTIVE (0xffffffff)
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/* Philips Proprietary Transfer Descriptor (PTD) */
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typedef __u32 __bitwise __dw;
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struct ptd {
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__dw dw0;
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__dw dw1;
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__dw dw2;
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__dw dw3;
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__dw dw4;
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__dw dw5;
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__dw dw6;
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__dw dw7;
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};
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#define PTD_OFFSET 0x0400
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#define ISO_PTD_OFFSET 0x0400
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#define INT_PTD_OFFSET 0x0800
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#define ATL_PTD_OFFSET 0x0c00
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#define PAYLOAD_OFFSET 0x1000
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/* ATL */
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/* DW0 */
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#define DW0_VALID_BIT 1
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#define FROM_DW0_VALID(x) ((x) & 0x01)
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#define TO_DW0_LENGTH(x) (((u32) x) << 3)
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#define TO_DW0_MAXPACKET(x) (((u32) x) << 18)
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#define TO_DW0_MULTI(x) (((u32) x) << 29)
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#define TO_DW0_ENDPOINT(x) (((u32) x) << 31)
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/* DW1 */
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#define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3)
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#define TO_DW1_PID_TOKEN(x) (((u32) x) << 10)
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#define DW1_TRANS_BULK ((u32) 2 << 12)
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#define DW1_TRANS_INT ((u32) 3 << 12)
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#define DW1_TRANS_SPLIT ((u32) 1 << 14)
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#define DW1_SE_USB_LOSPEED ((u32) 2 << 16)
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#define TO_DW1_PORT_NUM(x) (((u32) x) << 18)
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#define TO_DW1_HUB_NUM(x) (((u32) x) << 25)
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/* DW2 */
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#define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8)
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#define TO_DW2_RL(x) ((x) << 25)
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#define FROM_DW2_RL(x) (((x) >> 25) & 0xf)
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/* DW3 */
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#define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff)
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#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff)
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#define TO_DW3_NAKCOUNT(x) ((x) << 19)
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#define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf)
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#define TO_DW3_CERR(x) ((x) << 23)
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#define FROM_DW3_CERR(x) (((x) >> 23) & 0x3)
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#define TO_DW3_DATA_TOGGLE(x) ((x) << 25)
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#define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1)
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#define TO_DW3_PING(x) ((x) << 26)
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#define FROM_DW3_PING(x) (((x) >> 26) & 0x1)
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#define DW3_ERROR_BIT (1 << 28)
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#define DW3_BABBLE_BIT (1 << 29)
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#define DW3_HALT_BIT (1 << 30)
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#define DW3_ACTIVE_BIT (1 << 31)
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#define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01)
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#define INT_UNDERRUN (1 << 2)
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#define INT_BABBLE (1 << 1)
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#define INT_EXACT (1 << 0)
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#define SETUP_PID (2)
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#define IN_PID (1)
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#define OUT_PID (0)
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/* Errata 1 */
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#define RL_COUNTER (0)
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#define NAK_COUNTER (0)
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#define ERR_COUNTER (2)
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struct isp1760_qtd {
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u8 packet_type;
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void *data_buffer;
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u32 payload_addr;
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/* the rest is HCD-private */
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struct list_head qtd_list;
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struct urb *urb;
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size_t length;
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size_t actual_length;
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/* QTD_ENQUEUED: waiting for transfer (inactive) */
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/* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */
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/* QTD_XFER_STARTED: valid ptd has been written to isp176x - only
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interrupt handler may touch this qtd! */
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/* QTD_XFER_COMPLETE: payload has been transferred successfully */
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/* QTD_RETIRE: transfer error/abort qtd */
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#define QTD_ENQUEUED 0
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#define QTD_PAYLOAD_ALLOC 1
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#define QTD_XFER_STARTED 2
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#define QTD_XFER_COMPLETE 3
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#define QTD_RETIRE 4
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u32 status;
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};
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/* Queue head, one for each active endpoint */
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struct isp1760_qh {
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struct list_head qh_list;
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struct list_head qtd_list;
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u32 toggle;
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u32 ping;
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int slot;
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int tt_buffer_dirty; /* See USB2.0 spec section 11.17.5 */
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};
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struct urb_listitem {
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struct list_head urb_list;
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struct urb *urb;
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};
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/*
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* Access functions for isp176x registers (addresses 0..0x03FF).
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*/
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static u32 reg_read32(void __iomem *base, u32 reg)
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{
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return isp1760_read32(base, reg);
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}
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static void reg_write32(void __iomem *base, u32 reg, u32 val)
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{
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isp1760_write32(base, reg, val);
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}
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/*
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* Access functions for isp176x memory (offset >= 0x0400).
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*
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* bank_reads8() reads memory locations prefetched by an earlier write to
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* HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi-
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* bank optimizations, you should use the more generic mem_reads8() below.
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*
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* For access to ptd memory, use the specialized ptd_read() and ptd_write()
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* below.
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*
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* These functions copy via MMIO data to/from the device. memcpy_{to|from}io()
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* doesn't quite work because some people have to enforce 32-bit access
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*/
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static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr,
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__u32 *dst, u32 bytes)
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{
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__u32 __iomem *src;
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u32 val;
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__u8 *src_byteptr;
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__u8 *dst_byteptr;
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src = src_base + (bank_addr | src_offset);
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if (src_offset < PAYLOAD_OFFSET) {
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while (bytes >= 4) {
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*dst = le32_to_cpu(__raw_readl(src));
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bytes -= 4;
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src++;
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dst++;
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}
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} else {
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while (bytes >= 4) {
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*dst = __raw_readl(src);
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bytes -= 4;
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src++;
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dst++;
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}
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}
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if (!bytes)
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return;
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/* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
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* allocated.
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*/
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if (src_offset < PAYLOAD_OFFSET)
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val = le32_to_cpu(__raw_readl(src));
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else
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val = __raw_readl(src);
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dst_byteptr = (void *) dst;
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src_byteptr = (void *) &val;
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while (bytes > 0) {
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*dst_byteptr = *src_byteptr;
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dst_byteptr++;
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src_byteptr++;
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bytes--;
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}
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}
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static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst,
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u32 bytes)
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{
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reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0));
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ndelay(90);
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bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes);
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}
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static void mem_writes8(void __iomem *dst_base, u32 dst_offset,
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__u32 const *src, u32 bytes)
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{
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__u32 __iomem *dst;
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dst = dst_base + dst_offset;
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if (dst_offset < PAYLOAD_OFFSET) {
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while (bytes >= 4) {
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__raw_writel(cpu_to_le32(*src), dst);
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bytes -= 4;
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src++;
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dst++;
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}
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} else {
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while (bytes >= 4) {
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__raw_writel(*src, dst);
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bytes -= 4;
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src++;
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dst++;
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}
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}
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if (!bytes)
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return;
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/* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the
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* extra bytes should not be read by the HW.
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*/
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if (dst_offset < PAYLOAD_OFFSET)
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__raw_writel(cpu_to_le32(*src), dst);
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else
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__raw_writel(*src, dst);
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}
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/*
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* Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET,
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* INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32.
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*/
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static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot,
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struct ptd *ptd)
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{
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reg_write32(base, HC_MEMORY_REG,
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ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd));
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ndelay(90);
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bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0),
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(void *) ptd, sizeof(*ptd));
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}
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static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot,
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struct ptd *ptd)
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{
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mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0),
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&ptd->dw1, 7*sizeof(ptd->dw1));
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/* Make sure dw0 gets written last (after other dw's and after payload)
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since it contains the enable bit */
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wmb();
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mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0,
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sizeof(ptd->dw0));
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}
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/* memory management of the 60kb on the chip from 0x1000 to 0xffff */
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static void init_memory(struct isp1760_hcd *priv)
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{
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int i, curr;
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u32 payload_addr;
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payload_addr = PAYLOAD_OFFSET;
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for (i = 0; i < BLOCK_1_NUM; i++) {
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priv->memory_pool[i].start = payload_addr;
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priv->memory_pool[i].size = BLOCK_1_SIZE;
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priv->memory_pool[i].free = 1;
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payload_addr += priv->memory_pool[i].size;
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}
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curr = i;
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for (i = 0; i < BLOCK_2_NUM; i++) {
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priv->memory_pool[curr + i].start = payload_addr;
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priv->memory_pool[curr + i].size = BLOCK_2_SIZE;
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priv->memory_pool[curr + i].free = 1;
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payload_addr += priv->memory_pool[curr + i].size;
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}
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curr = i;
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for (i = 0; i < BLOCK_3_NUM; i++) {
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priv->memory_pool[curr + i].start = payload_addr;
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priv->memory_pool[curr + i].size = BLOCK_3_SIZE;
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priv->memory_pool[curr + i].free = 1;
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payload_addr += priv->memory_pool[curr + i].size;
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}
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WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE);
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}
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static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
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{
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struct isp1760_hcd *priv = hcd_to_priv(hcd);
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int i;
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WARN_ON(qtd->payload_addr);
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if (!qtd->length)
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return;
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for (i = 0; i < BLOCKS; i++) {
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if (priv->memory_pool[i].size >= qtd->length &&
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priv->memory_pool[i].free) {
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priv->memory_pool[i].free = 0;
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qtd->payload_addr = priv->memory_pool[i].start;
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return;
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}
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}
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}
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static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
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{
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struct isp1760_hcd *priv = hcd_to_priv(hcd);
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int i;
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if (!qtd->payload_addr)
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return;
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for (i = 0; i < BLOCKS; i++) {
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if (priv->memory_pool[i].start == qtd->payload_addr) {
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WARN_ON(priv->memory_pool[i].free);
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priv->memory_pool[i].free = 1;
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qtd->payload_addr = 0;
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return;
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}
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}
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dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n",
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__func__, qtd->payload_addr);
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WARN_ON(1);
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qtd->payload_addr = 0;
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}
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static int handshake(struct usb_hcd *hcd, u32 reg,
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u32 mask, u32 done, int usec)
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{
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u32 result;
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do {
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result = reg_read32(hcd->regs, reg);
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if (result == ~0)
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return -ENODEV;
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result &= mask;
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if (result == done)
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return 0;
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udelay(1);
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usec--;
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} while (usec > 0);
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return -ETIMEDOUT;
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}
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/* reset a non-running (STS_HALT == 1) controller */
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static int ehci_reset(struct usb_hcd *hcd)
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{
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struct isp1760_hcd *priv = hcd_to_priv(hcd);
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u32 command = reg_read32(hcd->regs, HC_USBCMD);
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command |= CMD_RESET;
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reg_write32(hcd->regs, HC_USBCMD, command);
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hcd->state = HC_STATE_HALT;
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priv->next_statechange = jiffies;
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return handshake(hcd, HC_USBCMD, CMD_RESET, 0, 250 * 1000);
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}
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static struct isp1760_qh *qh_alloc(gfp_t flags)
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{
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struct isp1760_qh *qh;
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qh = kmem_cache_zalloc(qh_cachep, flags);
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if (!qh)
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return NULL;
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INIT_LIST_HEAD(&qh->qh_list);
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INIT_LIST_HEAD(&qh->qtd_list);
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qh->slot = -1;
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return qh;
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}
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static void qh_free(struct isp1760_qh *qh)
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{
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WARN_ON(!list_empty(&qh->qtd_list));
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WARN_ON(qh->slot > -1);
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kmem_cache_free(qh_cachep, qh);
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}
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/* one-time init, only for memory state */
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static int priv_init(struct usb_hcd *hcd)
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{
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struct isp1760_hcd *priv = hcd_to_priv(hcd);
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u32 hcc_params;
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int i;
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spin_lock_init(&priv->lock);
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for (i = 0; i < QH_END; i++)
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|
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;
|
|
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(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:
|
|
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 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);
|
|
}
|