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u-boot/drivers/usb/isp1760/isp1760-hcd.c
Rui Miguel Silva 88861a2c2c usb: add isp1760 family driver 
ISP1760/61/63 are a family of usb controllers, here the main
goal is to support the ISP1763 hcd part found in the MPS3 FPGA
board form Arm. This is based on the kernel driver and ported
to u-boot.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
2022-07-12 21:59:54 +02:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Driver for the NXP ISP1760 chip
*
* Copyright 2021 Linaro, Rui Miguel Silva <rui.silva@linaro.org>
*
*/
#include <hexdump.h>
#include <common.h>
#include <asm/cache.h>
#include <cpu_func.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/device_compat.h>
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/usb/usb_urb_compat.h>
#include <usb.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <asm/unaligned.h>
#include "isp1760-core.h"
#include "isp1760-hcd.h"
#include "isp1760-regs.h"
#include "isp1760-uboot.h"
#define ISP1760_LANGUAGE_DESC "\4\3\19\4"
#define ISP1760_VENDOR_DESC "\16\3U\0-\0B\0o\0o\0t\0"
#define ISP1760_PRODUCT_NAME_DESC "\52\3I\0S\0P\0-\0 \0H\0o\0s\0t\0 \0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0"
static struct kmem_cache *qtd_cachep;
static struct kmem_cache *qh_cachep;
static struct kmem_cache *urb_listitem_cachep;
typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh,
struct isp1760_qtd *qtd);
static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
{
return hcd->hcd_priv;
}
#define dw_to_le32(x) (cpu_to_le32((__force u32)x))
#define le32_to_dw(x) ((__force __dw)(le32_to_cpu(x)))
/* urb state*/
#define DELETE_URB (0x0008)
#define NO_TRANSFER_ACTIVE (0xffffffff)
/* Philips Proprietary Transfer Descriptor (PTD) */
typedef __u32 __bitwise __dw;
struct ptd {
__dw dw0;
__dw dw1;
__dw dw2;
__dw dw3;
__dw dw4;
__dw dw5;
__dw dw6;
__dw dw7;
};
struct ptd_le32 {
__le32 dw0;
__le32 dw1;
__le32 dw2;
__le32 dw3;
__le32 dw4;
__le32 dw5;
__le32 dw6;
__le32 dw7;
};
#define PTD_OFFSET 0x0400
#define ISO_PTD_OFFSET 0x0400
#define INT_PTD_OFFSET 0x0800
#define ATL_PTD_OFFSET 0x0c00
#define PAYLOAD_OFFSET 0x1000
#define ISP_BANK_0 0x00
#define ISP_BANK_1 0x01
#define ISP_BANK_2 0x02
#define ISP_BANK_3 0x03
#define TO_DW(x) ((__force __dw)x)
#define TO_U32(x) ((__force u32)x)
/* ATL */
/* DW0 */
#define DW0_VALID_BIT TO_DW(1)
#define FROM_DW0_VALID(x) (TO_U32(x) & 0x01)
#define TO_DW0_LENGTH(x) TO_DW((((u32)x) << 3))
#define TO_DW0_MAXPACKET(x) TO_DW((((u32)x) << 18))
#define TO_DW0_MULTI(x) TO_DW((((u32)x) << 29))
#define TO_DW0_ENDPOINT(x) TO_DW((((u32)x) << 31))
/* DW1 */
#define TO_DW1_DEVICE_ADDR(x) TO_DW((((u32)x) << 3))
#define TO_DW1_PID_TOKEN(x) TO_DW((((u32)x) << 10))
#define DW1_TRANS_BULK TO_DW(((u32)2 << 12))
#define DW1_TRANS_INT TO_DW(((u32)3 << 12))
#define DW1_TRANS_SPLIT TO_DW(((u32)1 << 14))
#define DW1_SE_USB_LOSPEED TO_DW(((u32)2 << 16))
#define TO_DW1_PORT_NUM(x) TO_DW((((u32)x) << 18))
#define TO_DW1_HUB_NUM(x) TO_DW((((u32)x) << 25))
/* DW2 */
#define TO_DW2_DATA_START_ADDR(x) TO_DW((((u32)x) << 8))
#define TO_DW2_RL(x) TO_DW(((x) << 25))
#define FROM_DW2_RL(x) ((TO_U32(x) >> 25) & 0xf)
/* DW3 */
#define FROM_DW3_NRBYTESTRANSFERRED(x) TO_U32((x) & 0x3fff)
#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) TO_U32((x) & 0x07ff)
#define TO_DW3_NAKCOUNT(x) TO_DW(((x) << 19))
#define FROM_DW3_NAKCOUNT(x) ((TO_U32(x) >> 19) & 0xf)
#define TO_DW3_CERR(x) TO_DW(((x) << 23))
#define FROM_DW3_CERR(x) ((TO_U32(x) >> 23) & 0x3)
#define TO_DW3_DATA_TOGGLE(x) TO_DW(((x) << 25))
#define FROM_DW3_DATA_TOGGLE(x) ((TO_U32(x) >> 25) & 0x1)
#define TO_DW3_PING(x) TO_DW(((x) << 26))
#define FROM_DW3_PING(x) ((TO_U32(x) >> 26) & 0x1)
#define DW3_ERROR_BIT TO_DW((1 << 28))
#define DW3_BABBLE_BIT TO_DW((1 << 29))
#define DW3_HALT_BIT TO_DW((1 << 30))
#define DW3_ACTIVE_BIT TO_DW((1 << 31))
#define FROM_DW3_ACTIVE(x) ((TO_U32(x) >> 31) & 0x01)
#define INT_UNDERRUN BIT(2)
#define INT_BABBLE BIT(1)
#define INT_EXACT BIT(0)
#define SETUP_PID (2)
#define IN_PID (1)
#define OUT_PID (0)
/* Errata 1 */
#define RL_COUNTER (0)
#define NAK_COUNTER (0)
#define ERR_COUNTER (3)
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;
int epnum;
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;
};
static const u32 isp1763_hc_portsc1_fields[] = {
[PORT_OWNER] = BIT(13),
[PORT_POWER] = BIT(12),
[PORT_LSTATUS] = BIT(10),
[PORT_RESET] = BIT(8),
[PORT_SUSPEND] = BIT(7),
[PORT_RESUME] = BIT(6),
[PORT_PE] = BIT(2),
[PORT_CSC] = BIT(1),
[PORT_CONNECT] = BIT(0),
};
static struct descriptor {
struct usb_device_descriptor device;
struct usb_config_descriptor config;
struct usb_interface_descriptor interface;
struct usb_endpoint_descriptor endpoint;
} __packed rh_descriptor = {
{
/* usb 2.0 root hub device descriptor */
0x12, /* __u8 bLength; */
USB_DT_DEVICE, /* __u8 bDescriptorType; Device */
0x0002, /* __le16 bcdUSB; v2.0 */
0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
0x00, /* __u8 bDeviceSubClass; */
0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */
0x40, /* __u8 bMaxPacketSize0; 64 Bytes */
0x6b1d, /* __le16 idVendor; Linux Foundation 0x1d6b */
0x0200, /* __le16 idProduct; device 0x0002 */
0x0001, /* __le16 bcdDevice */
0x03, /* __u8 iManufacturer; */
0x02, /* __u8 iProduct; */
0x01, /* __u8 iSerialNumber; */
0x01 /* __u8 bNumConfigurations; */
}, {
/* one configuration */
0x09, /* __u8 bLength; */
USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */
0x1900, /* __le16 wTotalLength; */
0x01, /* __u8 bNumInterfaces; (1) */
0x01, /* __u8 bConfigurationValue; */
0x00, /* __u8 iConfiguration; */
0xc0, /* __u8 bmAttributes;
* Bit 7: must be set,
* 6: Self-powered,
* 5: Remote wakeup,
* 4..0: resvd
*/
0x00, /* __u8 MaxPower; */
}, {
/* one interface */
0x09, /* __u8 if_bLength; */
USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */
0x00, /* __u8 if_bInterfaceNumber; */
0x00, /* __u8 if_bAlternateSetting; */
0x01, /* __u8 if_bNumEndpoints; */
0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
0x00, /* __u8 if_bInterfaceSubClass; */
0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */
0x00, /* __u8 if_iInterface; */
}, {
/* one endpoint (status change endpoint) */
0x07, /* __u8 ep_bLength; */
USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */
0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
0x03, /* __u8 ep_bmAttributes; Interrupt */
/* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */
/* see hub.c:hub_configure() for details. */
(USB_MAXCHILDREN + 1 + 7) / 8, 0x00,
0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */
},
};
/*
* Access functions for isp176x registers regmap fields
*/
static u32 isp1760_hcd_read(struct usb_hcd *hcd, u32 field)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
return isp1760_field_read(priv->fields, field);
}
/*
* We need, in isp1763, to write directly the values to the portsc1
* register so it will make the other values to trigger.
*/
static void isp1760_hcd_portsc1_set_clear(struct isp1760_hcd *priv, u32 field,
u32 val)
{
u32 bit = isp1763_hc_portsc1_fields[field];
u32 port_status = readl(priv->base + ISP1763_HC_PORTSC1);
if (val)
writel(port_status | bit, priv->base + ISP1763_HC_PORTSC1);
else
writel(port_status & ~bit, priv->base + ISP1763_HC_PORTSC1);
}
static void isp1760_hcd_write(struct usb_hcd *hcd, u32 field, u32 val)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
if (unlikely(priv->is_isp1763 &&
(field >= PORT_OWNER && field <= PORT_CONNECT)))
return isp1760_hcd_portsc1_set_clear(priv, field, val);
isp1760_field_write(priv->fields, field, val);
}
static void isp1760_hcd_set(struct usb_hcd *hcd, u32 field)
{
isp1760_hcd_write(hcd, field, 0xFFFFFFFF);
}
static void isp1760_hcd_clear(struct usb_hcd *hcd, u32 field)
{
isp1760_hcd_write(hcd, field, 0);
}
static int isp1760_hcd_set_and_wait(struct usb_hcd *hcd, u32 field,
u32 timeout_us)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
u32 val;
isp1760_hcd_set(hcd, field);
return regmap_field_read_poll_timeout(priv->fields[field], val,
val, 0, timeout_us);
}
static int isp1760_hcd_set_and_wait_swap(struct usb_hcd *hcd, u32 field,
u32 timeout_us)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
u32 val;
isp1760_hcd_set(hcd, field);
return regmap_field_read_poll_timeout(priv->fields[field], val,
!val, 0, timeout_us);
}
static int isp1760_hcd_clear_and_wait(struct usb_hcd *hcd, u32 field,
u32 timeout_us)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
u32 val;
isp1760_hcd_clear(hcd, field);
return regmap_field_read_poll_timeout(priv->fields[field], val,
!val, 0, timeout_us);
}
static bool isp1760_hcd_is_set(struct usb_hcd *hcd, u32 field)
{
return !!isp1760_hcd_read(hcd, field);
}
static bool isp1760_hcd_ppc_is_set(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
if (priv->is_isp1763)
return true;
return isp1760_hcd_is_set(hcd, HCS_PPC);
}
static u32 isp1760_hcd_n_ports(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
if (priv->is_isp1763)
return 1;
return isp1760_hcd_read(hcd, HCS_N_PORTS);
}
/*
* 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_read() 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 = readl_relaxed(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 = readl_relaxed(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 isp1760_mem_read(struct usb_hcd *hcd, u32 src_offset, void *dst,
u32 bytes)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
isp1760_hcd_write(hcd, MEM_BANK_SEL, ISP_BANK_0);
isp1760_hcd_write(hcd, MEM_START_ADDR, src_offset);
ndelay(100);
bank_reads8(priv->base, src_offset, ISP_BANK_0, dst, bytes);
}
/*
* ISP1763 does not have the banks direct host controller memory access,
* needs to use the HC_DATA register. Add data read/write according to this,
* and also adjust 16bit access.
*/
static void isp1763_mem_read(struct usb_hcd *hcd, u16 srcaddr,
u16 *dstptr, u32 bytes)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
/* Write the starting device address to the hcd memory register */
isp1760_reg_write(priv->regs, ISP1763_HC_MEMORY, srcaddr);
ndelay(100); /* Delay between consecutive access */
/* As long there are at least 16-bit to read ... */
while (bytes >= 2) {
*dstptr = __raw_readw(priv->base + ISP1763_HC_DATA);
bytes -= 2;
dstptr++;
}
/* If there are no more bytes to read, return */
if (bytes <= 0)
return;
*((u8 *)dstptr) = (u8)(readw(priv->base + ISP1763_HC_DATA) & 0xFF);
}
static void mem_read(struct usb_hcd *hcd, u32 src_offset, __u32 *dst,
u32 bytes)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
if (!priv->is_isp1763)
return isp1760_mem_read(hcd, src_offset, (u16 *)dst, bytes);
isp1763_mem_read(hcd, (u16)src_offset, (u16 *)dst, bytes);
}
static void isp1760_mem_write(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) {
writel_relaxed(*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)
writel_relaxed(*src, dst);
else
__raw_writel(*src, dst);
}
static void isp1763_mem_write(struct usb_hcd *hcd, u16 dstaddr, u16 *src,
u32 bytes)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
/* Write the starting device address to the hcd memory register */
isp1760_reg_write(priv->regs, ISP1763_HC_MEMORY, dstaddr);
ndelay(100); /* Delay between consecutive access */
while (bytes >= 2) {
/* Get and write the data; then adjust the data ptr and len */
__raw_writew(*src, priv->base + ISP1763_HC_DATA);
bytes -= 2;
src++;
}
/* If there are no more bytes to process, return */
if (bytes <= 0)
return;
/*
* The only way to get here is if there is a single byte left,
* get it and write it to the data reg;
*/
writew(*((u8 *)src), priv->base + ISP1763_HC_DATA);
}
static void mem_write(struct usb_hcd *hcd, u32 dst_offset, __u32 *src,
u32 bytes)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
if (!priv->is_isp1763)
return isp1760_mem_write(priv->base, dst_offset, src, bytes);
isp1763_mem_write(hcd, dst_offset, (u16 *)src, bytes);
}
/*
* 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 isp1760_ptd_read(struct usb_hcd *hcd, u32 ptd_offset, u32 slot,
struct ptd *ptd)
{
u16 src_offset = ptd_offset + slot * sizeof(*ptd);
struct isp1760_hcd *priv = hcd_to_priv(hcd);
isp1760_hcd_write(hcd, MEM_BANK_SEL, ISP_BANK_0);
isp1760_hcd_write(hcd, MEM_START_ADDR, src_offset);
ndelay(90);
bank_reads8(priv->base, src_offset, ISP_BANK_0, (void *)ptd,
sizeof(*ptd));
}
static void isp1763_ptd_read(struct usb_hcd *hcd, u32 ptd_offset, u32 slot,
struct ptd *ptd)
{
u16 src_offset = ptd_offset + slot * sizeof(*ptd);
struct ptd_le32 le32_ptd;
isp1763_mem_read(hcd, src_offset, (u16 *)&le32_ptd, sizeof(le32_ptd));
/* Normalize the data obtained */
ptd->dw0 = le32_to_dw(le32_ptd.dw0);
ptd->dw1 = le32_to_dw(le32_ptd.dw1);
ptd->dw2 = le32_to_dw(le32_ptd.dw2);
ptd->dw3 = le32_to_dw(le32_ptd.dw3);
ptd->dw4 = le32_to_dw(le32_ptd.dw4);
ptd->dw5 = le32_to_dw(le32_ptd.dw5);
ptd->dw6 = le32_to_dw(le32_ptd.dw6);
ptd->dw7 = le32_to_dw(le32_ptd.dw7);
}
static void ptd_read(struct usb_hcd *hcd, u32 ptd_offset, u32 slot,
struct ptd *ptd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
if (!priv->is_isp1763)
return isp1760_ptd_read(hcd, ptd_offset, slot, ptd);
isp1763_ptd_read(hcd, ptd_offset, slot, ptd);
}
static void isp1763_ptd_write(struct usb_hcd *hcd, u32 ptd_offset, u32 slot,
struct ptd *cpu_ptd)
{
u16 dst_offset = ptd_offset + slot * sizeof(*cpu_ptd);
struct ptd_le32 ptd;
ptd.dw0 = dw_to_le32(cpu_ptd->dw0);
ptd.dw1 = dw_to_le32(cpu_ptd->dw1);
ptd.dw2 = dw_to_le32(cpu_ptd->dw2);
ptd.dw3 = dw_to_le32(cpu_ptd->dw3);
ptd.dw4 = dw_to_le32(cpu_ptd->dw4);
ptd.dw5 = dw_to_le32(cpu_ptd->dw5);
ptd.dw6 = dw_to_le32(cpu_ptd->dw6);
ptd.dw7 = dw_to_le32(cpu_ptd->dw7);
isp1763_mem_write(hcd, dst_offset, (u16 *)&ptd.dw0,
8 * sizeof(ptd.dw0));
}
static void isp1760_ptd_write(void __iomem *base, u32 ptd_offset, u32 slot,
struct ptd *ptd)
{
u32 dst_offset = ptd_offset + slot * sizeof(*ptd);
isp1760_mem_write(base, dst_offset + sizeof(ptd->dw0),
(__force u32 *)&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();
isp1760_mem_write(base, dst_offset, (__force u32 *)&ptd->dw0,
sizeof(ptd->dw0));
}
static void ptd_write(struct usb_hcd *hcd, u32 ptd_offset, u32 slot,
struct ptd *ptd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
if (!priv->is_isp1763)
return isp1760_ptd_write(priv->base, ptd_offset, slot, ptd);
isp1763_ptd_write(hcd, ptd_offset, slot, ptd);
}
/* memory management of the 60kb on the chip from 0x1000 to 0xffff */
static void init_memory(struct isp1760_hcd *priv)
{
const struct isp1760_memory_layout *mem = priv->memory_layout;
int i, j, curr;
u32 payload_addr;
payload_addr = PAYLOAD_OFFSET;
for (i = 0, curr = 0; i < ARRAY_SIZE(mem->blocks); i++, curr += j) {
for (j = 0; j < mem->blocks[i]; j++) {
priv->memory_pool[curr + j].start = payload_addr;
priv->memory_pool[curr + j].size = mem->blocks_size[i];
priv->memory_pool[curr + j].free = 1;
payload_addr += priv->memory_pool[curr + j].size;
}
}
WARN_ON(payload_addr - priv->memory_pool[0].start >
mem->payload_area_size);
}
static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
const struct isp1760_memory_layout *mem = priv->memory_layout;
int i;
WARN_ON(qtd->payload_addr);
if (!qtd->length)
return;
for (i = 0; i < mem->payload_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);
const struct isp1760_memory_layout *mem = priv->memory_layout;
int i;
if (!qtd->payload_addr)
return;
for (i = 0; i < mem->payload_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;
}
}
WARN_ON(1);
qtd->payload_addr = 0;
}
/* reset a non-running (STS_HALT == 1) controller */
static int ehci_reset(struct usb_hcd *hcd)
{
return isp1760_hcd_set_and_wait_swap(hcd, CMD_RESET, 250 * 1000);
}
static struct isp1760_qh *qh_alloc(gfp_t flags)
{
struct isp1760_qh *qh;
qh = kmem_cache_alloc(qh_cachep, flags);
if (!qh)
return NULL;
memset(qh, '\0', qh_cachep->sz);
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 isoc_cache;
u32 isoc_thres;
int i;
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;
if (priv->is_isp1763) {
priv->i_thresh = 2;
return 0;
}
/* controllers may cache some of the periodic schedule ... */
isoc_cache = isp1760_hcd_read(hcd, HCC_ISOC_CACHE);
isoc_thres = isp1760_hcd_read(hcd, HCC_ISOC_THRES);
/* full frame cache */
if (isoc_cache)
priv->i_thresh = 8;
else /* N microframes cached */
priv->i_thresh = 2 + isoc_thres;
return 0;
}
static int isp1760_hc_setup(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
u32 atx_reset;
int result;
u32 scratch;
u32 pattern;
if (priv->is_isp1763)
pattern = 0xcafe;
else
pattern = 0xdeadcafe;
isp1760_hcd_write(hcd, HC_SCRATCH, pattern);
/* Change bus pattern */
isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
scratch = isp1760_hcd_read(hcd, HC_SCRATCH);
if (scratch != pattern) {
printf("Scratch test failed. 0x%08x\n", scratch);
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.
*/
isp1760_hcd_clear(hcd, ISO_BUF_FILL);
isp1760_hcd_clear(hcd, INT_BUF_FILL);
isp1760_hcd_clear(hcd, ATL_BUF_FILL);
isp1760_hcd_set(hcd, HC_ATL_PTD_SKIPMAP);
isp1760_hcd_set(hcd, HC_INT_PTD_SKIPMAP);
isp1760_hcd_set(hcd, HC_ISO_PTD_SKIPMAP);
result = ehci_reset(hcd);
if (result)
return result;
/* Step 11 passed */
/* ATL reset */
if (priv->is_isp1763)
atx_reset = SW_RESET_RESET_ATX;
else
atx_reset = ALL_ATX_RESET;
isp1760_hcd_set(hcd, atx_reset);
mdelay(10);
isp1760_hcd_clear(hcd, atx_reset);
if (priv->is_isp1763) {
isp1760_hcd_set(hcd, HW_OTG_DISABLE);
isp1760_hcd_set(hcd, HW_SW_SEL_HC_DC_CLEAR);
isp1760_hcd_set(hcd, HW_HC_2_DIS_CLEAR);
isp1760_hcd_set(hcd, HW_DM_PULLDOWN);
isp1760_hcd_set(hcd, HW_DP_PULLDOWN);
mdelay(10);
isp1760_hcd_set(hcd, HW_INTF_LOCK);
}
isp1760_hcd_set(hcd, HC_INT_IRQ_ENABLE);
isp1760_hcd_set(hcd, HC_ATL_IRQ_ENABLE);
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;
u8 portnr;
u8 hubaddr;
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);
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 = TO_DW((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;
if (!qtd->urb->dev->dev->parent_priv_) {
portnr = qtd->urb->dev->portnr;
hubaddr = qtd->urb->dev->devnum;
} else {
usb_find_usb2_hub_address_port(qtd->urb->dev, &hubaddr,
&portnr);
}
ptd->dw1 |= TO_DW1_PORT_NUM(portnr);
ptd->dw1 |= TO_DW1_HUB_NUM(hubaddr);
/* SE bit for Split INT transfers */
if (usb_pipeint(qtd->urb->pipe) &&
qtd->urb->dev->speed == USB_SPEED_LOW)
ptd->dw1 |= DW1_SE_USB_LOSPEED;
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)
{
struct usb_host_endpoint *hep = qtd->urb->ep;
struct usb_endpoint_descriptor *epd = &hep->desc;
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 = epd->bInterval >> 3;
if (epd->bInterval > 4)
usof = 0x01; /* One bit set => interval 1 ms * uFrame-match */
else if (epd->bInterval > 2)
usof = 0x22; /* Two bits set => interval 1/2 ms */
else if (epd->bInterval > 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 = epd->bInterval;
/* Execute Start Split on any of the four first uFrames */
usof = 0x0f;
/*
* 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...
*/
/* Execute Complete Split on any uFrame */
ptd->dw5 = TO_DW(0xff);
}
/* Ensure equal or shorter period than requested */
period = period >> 1;
/* Mask off too large values and lowest unused 3 bits */
period &= 0xf8;
ptd->dw2 |= TO_DW(period);
ptd->dw4 = TO_DW(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)
{
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_range((unsigned long)ptr,
(unsigned long)ptr + PAGE_SIZE);
}
/* complete() can reenter this HCD */
usb_hcd_unlink_urb_from_ep(hcd, urb);
usb_hcd_giveback_urb(hcd, urb, urb->status);
}
static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb,
u8 packet_type)
{
struct isp1760_qtd *qtd;
qtd = kmem_cache_alloc(qtd_cachep, flags);
if (!qtd)
return NULL;
memset(qtd, '\0', sizeof(*qtd));
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);
const struct isp1760_memory_layout *mem = priv->memory_layout;
int skip_map;
WARN_ON((slot < 0) || (slot > mem->slot_num - 1));
WARN_ON(qtd->length && !qtd->payload_addr);
WARN_ON(slots[slot].qtd);
WARN_ON(slots[slot].qh);
WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC);
if (priv->is_isp1763)
ndelay(100);
/* Make sure done map has not triggered from some unlinked transfer */
if (ptd_offset == ATL_PTD_OFFSET) {
skip_map = isp1760_hcd_read(hcd, HC_ATL_PTD_SKIPMAP);
isp1760_hcd_write(hcd, HC_ATL_PTD_SKIPMAP,
skip_map | (1 << slot));
priv->atl_done_map |= isp1760_hcd_read(hcd, HC_ATL_PTD_DONEMAP);
priv->atl_done_map &= ~(1 << slot);
} else {
skip_map = isp1760_hcd_read(hcd, HC_INT_PTD_SKIPMAP);
isp1760_hcd_write(hcd, HC_INT_PTD_SKIPMAP,
skip_map | (1 << slot));
priv->int_done_map |= isp1760_hcd_read(hcd, HC_INT_PTD_DONEMAP);
priv->int_done_map &= ~(1 << slot);
}
skip_map &= ~(1 << slot);
qh->slot = slot;
qtd->status = QTD_XFER_STARTED;
slots[slot].qtd = qtd;
slots[slot].qh = qh;
ptd_write(hcd, ptd_offset, slot, ptd);
if (ptd_offset == ATL_PTD_OFFSET)
isp1760_hcd_write(hcd, HC_ATL_PTD_SKIPMAP, skip_map);
else
isp1760_hcd_write(hcd, HC_INT_PTD_SKIPMAP, 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)
{
struct isp1760_qtd *qtd, *qtd_next;
struct urb_listitem *urb_listitem;
int last_qtd;
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_read(hcd, qtd->payload_addr,
qtd->data_buffer,
qtd->actual_length);
fallthrough;
case OUT_PID:
qtd->urb->actual_length +=
qtd->actual_length;
fallthrough;
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_alloc(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);
const struct isp1760_memory_layout *mem = priv->memory_layout;
int slot_num = mem->slot_num;
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)))
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 < slot_num; curr_slot++) {
if (free_slot == -1 && !slots[curr_slot].qtd)
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_write(hcd, qtd->payload_addr,
qtd->data_buffer, qtd->length);
}
qtd->status = QTD_PAYLOAD_ALLOC;
}
if (qtd->status == QTD_PAYLOAD_ALLOC) {
/* Start xfer for this endpoint if not already done */
if ((curr_slot > slot_num - 1) && (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);
}
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)
{
u32 dw4;
int i;
dw4 = TO_U32(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:
printf("underrun during uFrame %d\n", i);
urb->status = -ECOMM; /* Could not write data */
break;
case INT_EXACT:
printf("transaction error uFrame %d\n", i);
/* timeout, bad CRC, PID error etc. */
urb->status = -EPROTO;
break;
case INT_BABBLE:
printf("babble error during uFrame %d\n", 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
urb->status = -EPROTO; /* Unknown */
/*
* useful debug
* printf("%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;
}
/* Transfer Error, *but* active and no HALT -> reload */
if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT))
return PTD_STATE_QTD_RELOAD;
/*
* 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.
*/
if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT))
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 isp1760_slotinfo *slots;
struct isp1760_qtd *qtd;
struct isp1760_qh *qh;
struct ptd ptd;
u32 ptd_offset;
int modified;
int skip_map;
int state;
int slot;
skip_map = isp1760_hcd_read(hcd, HC_INT_PTD_SKIPMAP);
priv->int_done_map &= ~skip_map;
skip_map = isp1760_hcd_read(hcd, HC_ATL_PTD_SKIPMAP);
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, 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, 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;
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(priv->dev,
"PTD_STATE_QTD_RELOAD on interrupt packet\n");
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(int irq, void *__hci)
{
struct usb_hcd *hcd = __hci;
struct isp1760_hcd *priv = hcd_to_priv(hcd);
irqreturn_t irqret = IRQ_NONE;
u32 int_reg;
u32 imask;
imask = isp1760_hcd_read(hcd, HC_INTERRUPT);
if (unlikely(!imask))
return irqret;
int_reg = priv->is_isp1763 ? ISP1763_HC_INTERRUPT :
ISP176x_HC_INTERRUPT;
isp1760_reg_write(priv->regs, int_reg, imask);
priv->int_done_map |= isp1760_hcd_read(hcd, HC_INT_PTD_DONEMAP);
priv->atl_done_map |= isp1760_hcd_read(hcd, HC_ATL_PTD_DONEMAP);
handle_done_ptds(hcd);
irqret = IRQ_HANDLED;
return irqret;
}
static int isp1763_run(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
int retval;
u32 chipid_h;
u32 chipid_l;
u32 chip_rev;
u32 ptd_atl_int;
u32 ptd_iso;
chipid_h = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
chipid_l = isp1760_hcd_read(hcd, HC_CHIP_ID_LOW);
chip_rev = isp1760_hcd_read(hcd, HC_CHIP_REV);
printf("USB ISP %02x%02x HW rev. %d started\n", chipid_h,
chipid_l, chip_rev);
isp1760_hcd_clear(hcd, ISO_BUF_FILL);
isp1760_hcd_clear(hcd, INT_BUF_FILL);
isp1760_hcd_clear(hcd, ATL_BUF_FILL);
isp1760_hcd_set(hcd, HC_ATL_PTD_SKIPMAP);
isp1760_hcd_set(hcd, HC_INT_PTD_SKIPMAP);
isp1760_hcd_set(hcd, HC_ISO_PTD_SKIPMAP);
ndelay(100);
isp1760_hcd_clear(hcd, HC_ATL_PTD_DONEMAP);
isp1760_hcd_clear(hcd, HC_INT_PTD_DONEMAP);
isp1760_hcd_clear(hcd, HC_ISO_PTD_DONEMAP);
isp1760_hcd_set(hcd, HW_OTG_DISABLE);
isp1760_reg_write(priv->regs, ISP1763_HC_OTG_CTRL_CLEAR, BIT(7));
isp1760_reg_write(priv->regs, ISP1763_HC_OTG_CTRL_CLEAR, BIT(15));
mdelay(10);
isp1760_hcd_set(hcd, HC_INT_IRQ_ENABLE);
isp1760_hcd_set(hcd, HC_ATL_IRQ_ENABLE);
isp1760_hcd_set(hcd, HW_GLOBAL_INTR_EN);
isp1760_hcd_clear(hcd, HC_ATL_IRQ_MASK_AND);
isp1760_hcd_clear(hcd, HC_INT_IRQ_MASK_AND);
isp1760_hcd_clear(hcd, HC_ISO_IRQ_MASK_AND);
isp1760_hcd_set(hcd, HC_ATL_IRQ_MASK_OR);
isp1760_hcd_set(hcd, HC_INT_IRQ_MASK_OR);
isp1760_hcd_set(hcd, HC_ISO_IRQ_MASK_OR);
ptd_atl_int = 0x8000;
ptd_iso = 0x0001;
isp1760_hcd_write(hcd, HC_ATL_PTD_LASTPTD, ptd_atl_int);
isp1760_hcd_write(hcd, HC_INT_PTD_LASTPTD, ptd_atl_int);
isp1760_hcd_write(hcd, HC_ISO_PTD_LASTPTD, ptd_iso);
isp1760_hcd_set(hcd, ATL_BUF_FILL);
isp1760_hcd_set(hcd, INT_BUF_FILL);
isp1760_hcd_clear(hcd, CMD_LRESET);
isp1760_hcd_clear(hcd, CMD_RESET);
retval = isp1760_hcd_set_and_wait(hcd, CMD_RUN, 250 * 1000);
if (retval)
return retval;
down_write(&ehci_cf_port_reset_rwsem);
retval = isp1760_hcd_set_and_wait(hcd, FLAG_CF, 250 * 1000);
up_write(&ehci_cf_port_reset_rwsem);
if (retval)
return retval;
return 0;
}
static int isp1760_run(struct usb_hcd *hcd)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
int retval;
u32 chipid_h;
u32 chipid_l;
u32 chip_rev;
u32 ptd_atl_int;
u32 ptd_iso;
/*
* ISP1763 have some differences in the setup and order to enable
* the ports, disable otg, setup buffers, and ATL, INT, ISO status.
* So, just handle it a separate sequence.
*/
if (priv->is_isp1763)
return isp1763_run(hcd);
/* Set PTD interrupt AND & OR maps */
isp1760_hcd_clear(hcd, HC_ATL_IRQ_MASK_AND);
isp1760_hcd_clear(hcd, HC_INT_IRQ_MASK_AND);
isp1760_hcd_clear(hcd, HC_ISO_IRQ_MASK_AND);
isp1760_hcd_set(hcd, HC_ATL_IRQ_MASK_OR);
isp1760_hcd_set(hcd, HC_INT_IRQ_MASK_OR);
isp1760_hcd_set(hcd, HC_ISO_IRQ_MASK_OR);
/* step 23 passed */
isp1760_hcd_set(hcd, HW_GLOBAL_INTR_EN);
isp1760_hcd_clear(hcd, CMD_LRESET);
isp1760_hcd_clear(hcd, CMD_RESET);
retval = isp1760_hcd_set_and_wait(hcd, 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);
retval = isp1760_hcd_set_and_wait(hcd, FLAG_CF, 250 * 1000);
up_write(&ehci_cf_port_reset_rwsem);
if (retval)
return retval;
chipid_h = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
chipid_l = isp1760_hcd_read(hcd, HC_CHIP_ID_LOW);
chip_rev = isp1760_hcd_read(hcd, HC_CHIP_REV);
dev_info(priv->dev, "USB ISP %02x%02x HW rev. %d started\n",
chipid_h, chipid_l, chip_rev);
/* PTD Register Init Part 2, Step 28 */
/* Setup registers controlling PTD checking */
ptd_atl_int = 0x80000000;
ptd_iso = 0x00000001;
isp1760_hcd_write(hcd, HC_ATL_PTD_LASTPTD, ptd_atl_int);
isp1760_hcd_write(hcd, HC_INT_PTD_LASTPTD, ptd_atl_int);
isp1760_hcd_write(hcd, HC_ISO_PTD_LASTPTD, ptd_iso);
isp1760_hcd_set(hcd, HC_ATL_PTD_SKIPMAP);
isp1760_hcd_set(hcd, HC_INT_PTD_SKIPMAP);
isp1760_hcd_set(hcd, HC_ISO_PTD_SKIPMAP);
isp1760_hcd_set(hcd, ATL_BUF_FILL);
isp1760_hcd_set(hcd, 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;
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_hcd *priv = hcd_to_priv(hcd);
const struct isp1760_memory_layout *mem = priv->memory_layout;
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(priv->dev, "buf is null, dma is %08lx len is %d\n",
(unsigned long)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));
/*
* 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;
if (len > mem->blocks_size[ISP176x_BLOCK_NUM - 1])
this_qtd_len = mem->blocks_size[ISP176x_BLOCK_NUM - 1];
else
this_qtd_len = len;
this_qtd_len = qtd_fill(qtd, buf, this_qtd_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) && maxpacketsize &&
(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 isp1760_qh *qh = NULL;
struct list_head *ep_queue;
LIST_HEAD(new_qtds);
int qh_in_queue;
int retval;
int epnum;
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:
ep_queue = &priv->qh_list[QH_INTERRUPT];
break;
case PIPE_ISOCHRONOUS:
printf("isochronous USB packets not yet supported\n");
return -EPIPE;
default:
printf("unknown pipe type\n");
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 = usb_hcd_link_urb_to_ep(hcd, urb);
if (retval) {
qtd_list_free(&new_qtds);
goto out;
}
epnum = usb_pipeendpoint(urb->pipe);
qh_in_queue = 0;
list_for_each_entry(qh, ep_queue, qh_list) {
if (qh->epnum == epnum) {
qh_in_queue = 1;
break;
}
}
if (!qh_in_queue) {
qh = qh_alloc(GFP_ATOMIC);
if (!qh) {
retval = -ENOMEM;
usb_hcd_unlink_urb_from_ep(hcd, urb);
qtd_list_free(&new_qtds);
goto out;
}
qh->epnum = epnum;
list_add_tail(&qh->qh_list, ep_queue);
urb->ep->hcpriv = qh;
}
list_splice_tail(&new_qtds, &qh->qtd_list);
schedule_ptds(hcd);
out:
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)) {
if (qh->slot != -1) {
skip_map = isp1760_hcd_read(hcd, HC_ATL_PTD_SKIPMAP);
skip_map |= (1 << qh->slot);
isp1760_hcd_write(hcd, HC_ATL_PTD_SKIPMAP, skip_map);
ndelay(100);
}
priv->atl_slots[qh->slot].qh = NULL;
priv->atl_slots[qh->slot].qtd = NULL;
} else {
if (qh->slot != -1) {
skip_map = isp1760_hcd_read(hcd, HC_INT_PTD_SKIPMAP);
skip_map |= (1 << qh->slot);
isp1760_hcd_write(hcd, HC_INT_PTD_SKIPMAP, 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;
}
}
int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
{
struct isp1760_qtd *qtd;
struct isp1760_qh *qh;
int retval = 0;
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:
return retval;
}
static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
struct usb_hub_descriptor *desc)
{
int ports;
u16 temp;
ports = isp1760_hcd_n_ports(priv->hcd);
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->bLength = 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 (isp1760_hcd_ppc_is_set(priv->hcd))
/* 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 void check_reset_complete(struct usb_hcd *hcd, int index)
{
if (!(isp1760_hcd_is_set(hcd, PORT_CONNECT)))
return;
/* if reset finished and it's still not enabled -- handoff */
if (!isp1760_hcd_is_set(hcd, PORT_PE)) {
printf("port %d full speed --> companion\n", index + 1);
isp1760_hcd_set(hcd, PORT_OWNER);
isp1760_hcd_clear(hcd, PORT_CSC);
} else {
printf("port %d high speed\n", index + 1);
}
}
static int isp1760_hub_control(struct usb_hcd *hcd, struct usb_device *dev,
unsigned long pipe, void *buffer, int length,
struct devrequest *setup)
{
struct isp1760_hcd *priv = hcd_to_priv(hcd);
u16 typeReq, wValue, wIndex;
char *buf = buffer;
void *src = NULL;
int src_len = 0;
int retval = 0;
u32 status;
int ports;
if (!setup)
return -EINVAL;
ports = isp1760_hcd_n_ports(hcd);
typeReq = setup->request | (setup->requesttype << 8);
wValue = le16_to_cpu(setup->value);
wIndex = le16_to_cpu(setup->index);
/*
* 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.
*/
switch (typeReq) {
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
break;
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
/* Nothing to do */
break;
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
switch (wValue & 0xff00) {
case USB_DT_DEVICE << 8:
src = &rh_descriptor.device;
src_len = 0x12;
break;
case USB_DT_CONFIG << 8:
src = &rh_descriptor.config;
src_len = 0x09;
break;
case USB_DT_STRING << 8:
switch (wValue & 0xff) {
case 0: /* Language */
src = ISP1760_LANGUAGE_DESC;
src_len = 4;
break;
case 1: /* Vendor String */
src = ISP1760_VENDOR_DESC;
src_len = 14;
break;
case 2: /* Product Name */
src = ISP1760_PRODUCT_NAME_DESC;
src_len = 42;
break;
default:
goto error;
}
break;
}
break;
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--;
/*
* 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:
isp1760_hcd_clear(hcd, PORT_PE);
break;
case USB_PORT_FEAT_C_ENABLE:
/* XXX error? */
break;
case USB_PORT_FEAT_SUSPEND:
if (isp1760_hcd_is_set(hcd, PORT_RESET))
goto error;
if (isp1760_hcd_is_set(hcd, PORT_SUSPEND)) {
if (!isp1760_hcd_is_set(hcd, PORT_PE))
goto error;
/* resume signaling for 20 msec */
isp1760_hcd_clear(hcd, PORT_CSC);
isp1760_hcd_set(hcd, PORT_RESUME);
priv->reset_done = get_timer(0) + 40;
}
break;
case USB_PORT_FEAT_C_SUSPEND:
/* we auto-clear this feature */
break;
case USB_PORT_FEAT_POWER:
if (isp1760_hcd_ppc_is_set(hcd))
isp1760_hcd_clear(hcd, PORT_POWER);
break;
case USB_PORT_FEAT_C_CONNECTION:
isp1760_hcd_set(hcd, 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;
}
isp1760_hcd_read(hcd, CMD_RUN);
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;
/* wPortChange bits */
if (isp1760_hcd_is_set(hcd, PORT_CSC))
status |= USB_PORT_STAT_C_CONNECTION << 16;
/* whoever resumes must GetPortStatus to complete it!! */
if (isp1760_hcd_is_set(hcd, PORT_RESUME)) {
status |= USB_PORT_STAT_C_SUSPEND << 16;
if (!priv->reset_done) {
priv->reset_done = get_timer(0) + 20;
} else if (get_timer(0) > priv->reset_done) {
/* stop resume signaling */
isp1760_hcd_clear(hcd, PORT_CSC);
retval = isp1760_hcd_clear_and_wait(hcd,
PORT_RESUME,
2000);
if (retval != 0) {
printf("port %d resume error %d\n",
wIndex + 1, retval);
goto error;
}
}
}
/* whoever resets must GetPortStatus to complete it!! */
if (isp1760_hcd_is_set(hcd, PORT_RESET) &&
get_timer(0) > priv->reset_done) {
status |= USB_PORT_STAT_C_RESET << 16;
priv->reset_done = 0;
/* force reset to complete */
/* REVISIT: some hardware needs 550+ usec to clear
* this bit; seems too long to spin routinely...
*/
retval = isp1760_hcd_clear_and_wait(hcd, PORT_RESET,
750);
if (retval != 0) {
printf("port %d reset error %d\n", wIndex + 1,
retval);
goto error;
}
/* see what we found out */
check_reset_complete(hcd, wIndex);
}
/*
* 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 (isp1760_hcd_is_set(hcd, PORT_OWNER))
printf("PORT_OWNER is set\n");
if (isp1760_hcd_is_set(hcd, PORT_CONNECT)) {
status |= USB_PORT_STAT_CONNECTION;
/* status may be from integrated TT */
status |= USB_PORT_STAT_HIGH_SPEED;
}
if (isp1760_hcd_is_set(hcd, PORT_PE))
status |= USB_PORT_STAT_ENABLE;
if (isp1760_hcd_is_set(hcd, PORT_SUSPEND) &&
isp1760_hcd_is_set(hcd, PORT_RESUME))
status |= USB_PORT_STAT_SUSPEND;
if (isp1760_hcd_is_set(hcd, PORT_RESET))
status |= USB_PORT_STAT_RESET;
if (isp1760_hcd_is_set(hcd, PORT_POWER))
status |= USB_PORT_STAT_POWER;
put_unaligned(cpu_to_le32(status), (__le32 *)buf);
break;
case SetHubFeature:
switch (wValue) {
case C_HUB_LOCAL_POWER:
case C_HUB_OVER_CURRENT:
/* no hub-wide feature/status flags */
break;
default:
goto error;
}
break;
case SetPortFeature:
wIndex &= 0xff;
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
if (isp1760_hcd_is_set(hcd, PORT_OWNER))
break;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
isp1760_hcd_set(hcd, PORT_PE);
break;
case USB_PORT_FEAT_SUSPEND:
if (!isp1760_hcd_is_set(hcd, PORT_PE) ||
isp1760_hcd_is_set(hcd, PORT_RESET))
goto error;
isp1760_hcd_set(hcd, PORT_SUSPEND);
break;
case USB_PORT_FEAT_POWER:
if (isp1760_hcd_ppc_is_set(hcd))
isp1760_hcd_set(hcd, PORT_POWER);
break;
case USB_PORT_FEAT_RESET:
if (isp1760_hcd_is_set(hcd, 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 ((isp1760_hcd_is_set(hcd, PORT_CONNECT) &&
!isp1760_hcd_is_set(hcd, PORT_PE)) &&
(isp1760_hcd_read(hcd, PORT_LSTATUS) == 1)) {
isp1760_hcd_set(hcd, PORT_OWNER);
} else {
isp1760_hcd_set(hcd, PORT_RESET);
isp1760_hcd_clear(hcd, PORT_PE);
priv->reset_done = get_timer(0) + 50;
}
break;
default:
goto error;
}
break;
default:
printf("root: unknown request: 0x%0x\n", typeReq);
goto error;
}
if (src_len) {
length = min(src_len, length);
if (src && length > 0)
memcpy(buffer, src, length);
else
printf("zero copy USB descriptor\n");
}
dev->act_len = length;
dev->status = 0;
return 0;
error:
/* "stall" on error */
dev->act_len = 0;
dev->status = USB_ST_STALLED;
return -EPIPE;
}
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)
goto destroy_urb_listitem;
qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
0, SLAB_TEMPORARY | SLAB_MEM_SPREAD,
NULL);
if (!qh_cachep)
goto destroy_qtd;
return 0;
destroy_qtd:
kmem_cache_destroy(qtd_cachep);
destroy_urb_listitem:
kmem_cache_destroy(urb_listitem_cachep);
return -ENOMEM;
}
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_lowlevel_init(struct isp1760_hcd *priv)
{
int ret;
ret = isp1760_hc_setup(priv->hcd);
if (ret < 0)
return ret;
ret = isp1760_run(priv->hcd);
if (ret < 0)
return ret;
return 0;
}
static const struct usb_urb_ops isp1760_urb_ops = {
.urb_enqueue = isp1760_urb_enqueue,
.urb_dequeue = isp1760_urb_dequeue,
.hub_control = isp1760_hub_control,
.isr = isp1760_irq,
};
int isp1760_hcd_register(struct isp1760_hcd *priv, struct resource *mem,
int irq, unsigned long irqflags,
struct udevice *dev)
{
const struct isp1760_memory_layout *mem_layout = priv->memory_layout;
struct isp1760_host_data *host = dev_get_priv(dev);
struct usb_hcd *hcd = &host->hcd;
int ret;
priv->hcd = hcd;
hcd->hcd_priv = priv;
priv->hcd = hcd;
hcd->urb_ops = &isp1760_urb_ops;
priv->atl_slots = kcalloc(mem_layout->slot_num,
sizeof(struct isp1760_slotinfo), GFP_KERNEL);
if (!priv->atl_slots)
return -ENOMEM;
priv->int_slots = kcalloc(mem_layout->slot_num,
sizeof(struct isp1760_slotinfo), GFP_KERNEL);
if (!priv->int_slots) {
ret = -ENOMEM;
goto free_atl_slots;
}
host->host_speed = USB_SPEED_HIGH;
init_memory(priv);
return 0;
free_atl_slots:
kfree(priv->atl_slots);
return ret;
}
void isp1760_hcd_unregister(struct isp1760_hcd *priv)
{
struct isp1760_qh *qh, *qh_next;
int i;
for (i = 0; i < QH_END; i++)
list_for_each_entry_safe(qh, qh_next, &priv->qh_list[i],
qh_list) {
qtd_list_free(&qh->qtd_list);
list_del(&qh->qh_list);
qh_free(qh);
}
kfree(priv->atl_slots);
kfree(priv->int_slots);
}
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