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Code Issues Releases Wiki Activity

xhci控制器初始化（还存在bug，无法reset端口）

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This commit is contained in:
fslongjin 2022-07-21 20:43:49 +08:00
parent c9c8147cdf
commit fa1c2bd461
5 changed files with 202 additions and 31 deletions
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2
kernel/common/time.h
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@ -25,7 +25,7 @@ struct tm
struct timespec
{
long int tv_sec; // 秒
long int tv_nsec; // 纳秒
long long tv_nsec; // 纳秒
};
/**

2
kernel/driver/pci/pci.c
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@ -36,7 +36,7 @@ static void pci_checkBus(uint8_t bus);
* @brief 生成架构相关的message data
*
*/
#define pci_get_arch_msi_message_data(vector, processor, edge_trigger, assert) ((uint32_t)((vector & 0xff) | (edge_trigger == 1 ? 0 : (1 << 15)) | (assert == 0 ? 0 : (1 << 14))))
#define pci_get_arch_msi_message_data(vector, processor, edge_trigger, assert) ((uint32_t)((vector & 0xff) | (edge_trigger == 1 ? 0 : (1 << 15)) | ((assert == 0) ? 0 : (1 << 14))))
/**
* @brief 从pci配置空间读取信息

6
kernel/driver/usb/usb.h
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@ -12,6 +12,12 @@
#define USB_TYPE_UNSPEC 0x80 // Unspecified
#define USB_TYPE_DEVICE 0xfe // USB Device(Not controller)
// Reset wait times(milliseconds) ,USB 2.0 specs, page 153, section 7.1.7.5, paragraph 3
#define USB_TIME_RST_RH 50 // reset on a root hub
#define USB_TIME_RST_MIN 10 // minimum delay for a reset
#define USB_TIME_RST_NOMORE 3 // No more than this between resets for root hubs
#define USB_TIME_RST_REC 10 // reset recovery
/**
* @brief 初始化usb驱动程序
*

207
kernel/driver/usb/xhci/xhci.c
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@ -20,6 +20,20 @@ void xhci_hc_irq_disable(uint64_t irq_num);
uint64_t xhci_hc_irq_install(uint64_t irq_num, void *arg);
void xhci_hc_irq_uninstall(uint64_t irq_num);
static int xhci_hc_find_available_id();
static int xhci_hc_stop(int id);
static int xhci_hc_reset(int id);
static int xhci_hc_stop_legacy(int id);
static int xhci_hc_start_sched(int id);
static int xhci_hc_stop_sched(int id);
static uint32_t xhci_hc_get_protocol_offset(int id, uint32_t list_off, const int version, uint32_t *offset, uint32_t *count, uint16_t *protocol_flag);
static int xhci_hc_pair_ports(int id);
static uint64_t xhci_create_ring(int trbs);
static uint64_t xhci_create_event_ring(int trbs, uint64_t *ret_ring_addr);
void xhci_hc_irq_handler(uint64_t irq_num, uint64_t cid, struct pt_regs *regs);
static int xhci_hc_init_intr(int id);
static int xhci_hc_start_ports(int id);
hardware_intr_controller xhci_hc_intr_controller =
{
.enable = xhci_hc_irq_enable,
@ -210,9 +224,11 @@ static int xhci_hc_stop(int id)
static int xhci_hc_reset(int id)
{
int retval = 0;
kdebug("usbsts=%#010lx", xhci_read_op_reg32(id, XHCI_OPS_USBSTS));
// 判断HCHalted是否置位
if ((xhci_read_op_reg32(id, XHCI_OPS_USBSTS) & (1 << 0)) == 0)
{
kdebug("stopping usb hc...");
// 未置位，需要先尝试停止usb主机控制器
retval = xhci_hc_stop(id);
if (unlikely(retval))
@ -220,8 +236,11 @@ static int xhci_hc_reset(int id)
}
int timeout = 500; // wait 500ms
// reset
xhci_write_op_reg32(id, XHCI_OPS_USBCMD, (1 << 1));
uint32_t cmd = xhci_read_op_reg32(id, XHCI_OPS_USBCMD);
kdebug("cmd=%#010lx", cmd);
cmd |= (1 << 1);
xhci_write_op_reg32(id, XHCI_OPS_USBCMD, cmd);
kdebug("after rst, sts=%#010lx", xhci_read_op_reg32(id, XHCI_OPS_USBSTS));
while (xhci_read_op_reg32(id, XHCI_OPS_USBCMD) & (1 << 1))
{
usleep(1000);
@ -285,6 +304,7 @@ static int xhci_hc_stop_legacy(int id)
static int xhci_hc_start_sched(int id)
{
xhci_write_op_reg32(id, XHCI_OPS_USBCMD, (1 << 0) | (1 >> 2) | (1 << 3));
usleep(100 * 1000);
}
/**
@ -331,11 +351,11 @@ static uint32_t xhci_hc_get_protocol_offset(int id, uint32_t list_off, const int
uint32_t dw2 = xhci_read_cap_reg32(id, list_off + 8);
if (offset != NULL)
*offset = (uint32_t)(dw2 & 0xff);
*offset = (uint32_t)(dw2 & 0xff) - 1; // 使其转换为zero based
if (count != NULL)
*count = (uint32_t)((dw2 & 0xff00) >> 8);
if (protocol_flag != NULL)
*protocol_flag = (uint16_t)((dw2 >> 16) & 0xffff);
*protocol_flag = (uint16_t)((dw2 >> 16) & 0x0fff);
return next_list_off;
}
@ -378,7 +398,7 @@ static int xhci_hc_pair_ports(int id)
{
for (int i = 0; i < cnt; ++i)
{
xhci_hc[id].ports[offset + i].offset = ++xhci_hc[id].port_num_u2;
xhci_hc[id].ports[offset + i].offset = xhci_hc[id].port_num_u2++;
xhci_hc[id].ports[offset + i].flags = XHCI_PROTOCOL_USB2;
// usb2 high speed only
@ -398,16 +418,16 @@ static int xhci_hc_pair_ports(int id)
{
for (int i = 0; i < cnt; ++i)
{
xhci_hc[id].ports[offset + i].offset = ++xhci_hc[id].port_num_u3;
xhci_hc[id].ports[offset + i].offset = xhci_hc[id].port_num_u3++;
xhci_hc[id].ports[offset + i].flags = XHCI_PROTOCOL_USB3;
}
}
}
// 将对应的USB2端口和USB3端口进行配对
for (int i = 1; i <= xhci_hc[id].port_num; ++i)
for (int i = 0; i < xhci_hc[id].port_num; ++i)
{
for (int j = i; j <= xhci_hc[id].port_num; ++j)
for (int j = 0; j < xhci_hc[id].port_num; ++j)
{
if (unlikely(i == j))
continue;
@ -424,8 +444,8 @@ static int xhci_hc_pair_ports(int id)
}
}
// 标记所有的usb3端口为激活状态
for (int i = 1; i <= xhci_hc[id].port_num; ++i)
// 标记所有的usb3、单独的usb2端口为激活状态
for (int i = 0; i < xhci_hc[id].port_num; ++i)
{
if (XHCI_PORT_IS_USB3(id, i) ||
(XHCI_PORT_IS_USB2(id, i) && (!XHCI_PORT_HAS_PAIR(id, i))))
@ -449,8 +469,8 @@ static int xhci_hc_pair_ports(int id)
}
else if (XHCI_PORT_IS_USB2(id, i))
{
kdebug("USB2 port %d, offset=%d, current port is %s, has pair=%s", i, xhci_hc[id].ports[i].offset,
XHCI_PORT_IS_ACTIVE(id, i) ? "active" : "inactive", XHCI_PORT_HAS_PAIR(id, i)?"true":"false");
kdebug("USB2 port %d, offset=%d, current port is %s, has pair=%s", i, xhci_hc[id].ports[i].offset,
XHCI_PORT_IS_ACTIVE(id, i) ? "active" : "inactive", XHCI_PORT_HAS_PAIR(id, i) ? "true" : "false");
}
}
*/
@ -511,9 +531,13 @@ void xhci_hc_irq_enable(uint64_t irq_num)
int cid = xhci_find_hcid_by_irq_num(irq_num);
if (WARN_ON(cid == -1))
return;
kdebug("start msi");
pci_start_msi(xhci_hc[cid].pci_dev_hdr);
kdebug("start sched");
xhci_hc_start_sched(cid);
kdebug("start ports");
xhci_hc_start_ports(cid);
kdebug("enabled");
}
void xhci_hc_irq_disable(uint64_t irq_num)
@ -535,6 +559,7 @@ uint64_t xhci_hc_irq_install(uint64_t irq_num, void *arg)
struct xhci_hc_irq_install_info_t *info = (struct xhci_hc_irq_install_info_t *)arg;
pci_enable_msi(xhci_hc[cid].pci_dev_hdr, irq_num, info->processor, info->edge_trigger, info->assert);
kdebug("xhci irq %d installed.", irq_num);
return 0;
}
@ -559,6 +584,136 @@ void xhci_hc_irq_handler(uint64_t irq_num, uint64_t cid, struct pt_regs *regs)
kdebug("USB irq received.");
}
/**
* @brief 重置端口
*
* @param id 控制器id
* @param port 端口id
* @return int
*/
static int xhci_reset_port(const int id, const int port)
{
int retval = 0;
// 相对于op寄存器基地址的偏移量
uint64_t port_status_offset = XHCI_OPS_PRS + port * 16;
kdebug("to reset %d, offset=%#018lx", port, port_status_offset);
// 检查端口电源状态
if ((xhci_read_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC) & (1 << 9)) == 0)
{
kdebug("port is power off, starting...");
xhci_write_cap_reg32(id, port_status_offset + XHCI_PORT_PORTSC, (1 << 9));
usleep(2000);
// 检测端口是否被启用, 若未启用，则报错
if ((xhci_read_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC) & (1 << 9)) == 0)
{
kdebug("cannot power on %d", port);
return -EAGAIN;
}
}
kdebug("port:%d, power check ok", port);
// 确保端口的status被清0
xhci_write_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC, (1 << 9) | XHCI_PORTUSB_CHANGE_BITS);
// 重置当前端口
if (XHCI_PORT_IS_USB3(id, port))
xhci_write_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC, (1 << 9) | (1 << 31));
else
xhci_write_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC, (1 << 9) | (1 << 4));
retval = -ETIMEDOUT;
kdebug("val = %#010lx", xhci_read_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC));
// 等待portsc的port reset change位被置位，说明reset完成
int timeout = 200;
while (timeout)
{
uint32_t val = xhci_read_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC);
// if (timeout % 100)
// kdebug("val = %#010lx", val);
if (val & (1 << 21))
break;
--timeout;
usleep(500);
}
kdebug("timeout= %d", timeout);
if (timeout > 0)
{
// 等待恢复
usleep(USB_TIME_RST_REC * 1000);
uint32_t val = xhci_read_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC);
// 如果reset之后，enable bit仍然是1，那么说明reset成功
if (val & (1 << 1))
{
// 清除status change bit
xhci_write_op_reg32(id, port_status_offset + XHCI_PORT_PORTSC, (1 << 9) | XHCI_PORTUSB_CHANGE_BITS);
}
retval = 0;
}
// 如果usb2端口成功reset，则处理该端口的active状态
if (retval == 0 && XHCI_PORT_IS_USB2(id, port))
{
xhci_hc[id].ports[port].flags |= XHCI_PROTOCOL_ACTIVE;
if (XHCI_PORT_HAS_PAIR(id, port)) // 如果有对应的usb3端口，则将usb3端口设置为未激活
xhci_hc[id].ports[xhci_hc[id].ports[port].paired_port_num].flags &= ~(XHCI_PROTOCOL_ACTIVE);
}
// 如果usb3端口reset失败，则启用与之配对的usb2端口
if (retval != 0 && XHCI_PORT_IS_USB3(id, port))
{
xhci_hc[id].ports[port].flags &= ~XHCI_PROTOCOL_ACTIVE;
xhci_hc[id].ports[xhci_hc[id].ports[port].paired_port_num].flags |= XHCI_PROTOCOL_ACTIVE;
}
return retval;
}
/**
* @brief 启用xhci控制器的端口
*
* @param id 控制器id
* @return int
*/
static int xhci_hc_start_ports(int id)
{
int cnt = 0;
// 注意，这两个循环应该不能合并到一起，因为可能存在usb2端口offset在前，usb3端口在后的情况，那样的话就会出错
// 循环启动所有的usb3端口
for (int i = 0; i < xhci_hc[id].port_num; ++i)
{
if (XHCI_PORT_IS_USB3(id, i) && XHCI_PORT_IS_ACTIVE(id, i))
{
// reset该端口
if (likely(xhci_reset_port(id, i) == 0)) // 如果端口reset成功，就获取它的描述符
// 否则，reset函数会把它给设置为未激活，并且标志配对的usb2端口是激活的
{
// xhci_hc_get_descriptor(id, i);
++cnt;
}
}
}
kdebug("active usb3 ports:%d", cnt);
// 循环启动所有的usb2端口
for (int i = 0; i < xhci_hc[id].port_num; ++i)
{
if (XHCI_PORT_IS_USB2(id, i) && XHCI_PORT_IS_ACTIVE(id, i))
{
// reset该端口
if (likely(xhci_reset_port(id, i) == 0)) // 如果端口reset成功，就获取它的描述符
// 否则，reset函数会把它给设置为未激活，并且标志配对的usb2端口是激活的
{
// xhci_hc_get_descriptor(id, i);
++cnt;
}
}
}
kinfo("xHCI controller %d: Started %d ports.", id, cnt);
}
/**
* @brief 初始化xhci主机控制器的中断控制
*
@ -594,18 +749,12 @@ static int xhci_hc_init_intr(int id)
xhci_write_intr_reg64(id, 0, XHCI_IR_TABLE_ADDR, virt_2_phys(xhci_hc[id].event_ring_table_vaddr)); // 写入table地址
// 清除状态位
struct xhci_ops_usbsts_reg_t sts = {0};
sts.hse = 1;
sts.eint = 1;
sts.pcd = 1;
sts.sre = 1;
kdebug("new_sts=%#010lx", *(uint32_t *)(&sts));
xhci_write_op_reg32(id, XHCI_OPS_USBSTS, *(uint32_t *)(&sts));
xhci_write_op_reg32(id, XHCI_OPS_USBSTS, (1 << 10) | (1 << 4) | (1 << 3) | (1 << 2));
// 开启usb中断
// 注册中断处理程序
struct xhci_hc_irq_install_info_t install_info;
install_info.assert = 0;
install_info.assert = 1;
install_info.edge_trigger = 1;
install_info.processor = 0; // 投递到bsp
@ -614,7 +763,7 @@ static int xhci_hc_init_intr(int id)
sprintk(buf, "xHCI HC%d", id);
irq_register(xhci_controller_irq_num[id], &install_info, &xhci_hc_irq_handler, id, &xhci_hc_intr_controller, buf);
kfree(buf);
kdebug("xhci host controller %d: interrupt registered. irq num=%d", id, xhci_controller_irq_num[id]);
return 0;
@ -674,7 +823,7 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
xhci_hc[cid].db_offset = xhci_read_cap_reg32(cid, XHCI_CAPS_DBOFF) & (~0x3); // bits [1:0] reserved
xhci_hc[cid].rts_offset = xhci_read_cap_reg32(cid, XHCI_CAPS_RTSOFF) & (~0x1f); // bits [4:0] reserved.
xhci_hc[cid].ext_caps_off = (hcc1.xECP) * 4;
xhci_hc[cid].ext_caps_off = 1UL * (hcc1.xECP) * 4;
xhci_hc[cid].context_size = (hcc1.csz) ? 64 : 32;
if (iversion < 0x95)
@ -692,15 +841,17 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
pci_write_config(dev_hdr->header.bus, dev_hdr->header.device, dev_hdr->header.func, 0xd0, 0xffffffff);
}
// 重置xhci控制器
FAIL_ON(xhci_hc_reset(cid), failed);
// 关闭legacy支持
FAIL_ON(xhci_hc_stop_legacy(cid), failed);
// 重置xhci控制器
FAIL_ON(xhci_hc_reset(cid), failed);
// 端口配对
FAIL_ON(xhci_hc_pair_ports(cid), failed);
// ========== 设置USB host controller =========
// 获取页面大小
kdebug("ops pgsize=%#010lx", xhci_read_op_reg32(cid, XHCI_OPS_PAGESIZE));
xhci_hc[cid].page_size = (xhci_read_op_reg32(cid, XHCI_OPS_PAGESIZE) & 0xffff) << 12;
kdebug("page size=%d", xhci_hc[cid].page_size);
@ -715,7 +866,7 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
goto failed_free_dyn;
}
// 写入dcbaap
xhci_write_cap_reg64(cid, XHCI_OPS_DCBAAP, virt_2_phys(xhci_hc[cid].dcbaap_vaddr));
xhci_write_op_reg64(cid, XHCI_OPS_DCBAAP, virt_2_phys(xhci_hc[cid].dcbaap_vaddr));
// 创建command ring
xhci_hc[cid].cmd_ring_vaddr = xhci_create_ring(XHCI_CMND_RING_TRBS);
@ -731,7 +882,9 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
// 写入command ring控制寄存器
xhci_write_op_reg64(cid, XHCI_OPS_CRCR, virt_2_phys(xhci_hc[cid].cmd_ring_vaddr) | xhci_hc[cid].cmd_trb_cycle);
// 写入配置寄存器
xhci_write_op_reg32(cid, XHCI_OPS_CONFIG, hcs1.max_slots);
uint32_t max_slots = hcs1.max_slots;
kdebug("max slots = %d", max_slots);
xhci_write_op_reg32(cid, XHCI_OPS_CONFIG, max_slots);
// 写入设备通知控制寄存器
xhci_write_op_reg32(cid, XHCI_OPS_DNCTRL, (1 << 1)); // 目前只有N1被支持

16
kernel/driver/usb/xhci/xhci.h
View File

@ -323,7 +323,7 @@ struct xhci_intr_moderation_t
} __attribute__((packed));
// ======== Runtime Register Set END =========
// ======= xhci Extended Capabilities List ========
// ======= xhci Extended Capabilities List BEGIN========
// ID 部分的含义定义
#define XHCI_XECP_ID_RESERVED 0
@ -341,6 +341,18 @@ struct xhci_intr_moderation_t
#define XHCI_XECP_LEGACY_OS_OWNED (1 << 24) // 当系统控制着该hc时，该位被置位
#define XHCI_XECP_LEGACY_OWNING_MASK (XHCI_XECP_LEGACY_BIOS_OWNED | XHCI_XECP_LEGACY_OS_OWNED)
// ======= xhci Extended Capabilities List END ========
// ======= Port status and control registers BEGIN ====
#define XHCI_PORT_PORTSC 0x00 // Port status and control
#define XHCI_PORT_PORTPMSC 0x04 // Port power management status and control
#define XHCI_PORT_PORTLI 0x08 // Port Link info
#define XHCI_PORT_PORTHLMPC 0x0c // Port hardware LPM control (version 1.10 only
#define XHCI_PORTUSB_CHANGE_BITS ((1 << 17) | (1 << 18) | (1 << 20) | (1 << 21) | (1 << 22))
// ======= Port status and control registers END ====
// 端口信息标志位
#define XHCI_PROTOCOL_USB2 0
#define XHCI_PROTOCOL_USB3 1
@ -374,7 +386,7 @@ struct xhci_host_controller_t
uint16_t port_num; // 总的端口数量
uint8_t port_num_u2; // usb 2.0端口数量
uint8_t port_num_u3; // usb 3端口数量
uint8_t page_size; // page size
uint32_t page_size; // page size
uint64_t dcbaap_vaddr; // Device Context Base Address Array Pointer的虚拟地址
uint64_t cmd_ring_vaddr; // command ring的虚拟地址
uint64_t event_ring_vaddr; // event ring的虚拟地址