diff options
Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 646 |
1 files changed, 0 insertions, 646 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c deleted file mode 100644 index 5ae16f5ca5..0000000000 --- a/drivers/usb/host/xhci-hub.c +++ /dev/null @@ -1,646 +0,0 @@ -/* - * xHCI USB 3.0 Root Hub - * - * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> - * - * This currently does not support any SuperSpeed capabilities. - * - * Some code borrowed from the Linux xHCI driver - * Author: Sarah Sharp - * Copyright (C) 2008 Intel Corp. - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ -//#define DEBUG -#include <clock.h> -#include <common.h> -#include <io.h> -#include <linux/err.h> -#include <usb/usb.h> -#include <usb/xhci.h> - -#include "xhci.h" - -static const struct usb_root_hub_info usb_rh_info = { - .hub = { - .bLength = USB_DT_HUB_NONVAR_SIZE + - ((USB_MAXCHILDREN + 1 + 7) / 8), - .bDescriptorType = USB_DT_HUB, - .bNbrPorts = 0, /* runtime modified */ - .wHubCharacteristics = 0, - .bPwrOn2PwrGood = 10, - .bHubContrCurrent = 0, - .u.hs.DeviceRemovable = {}, - .u.hs.PortPwrCtrlMask = {} - }, - .device = { - .bLength = USB_DT_DEVICE_SIZE, - .bDescriptorType = USB_DT_DEVICE, - .bcdUSB = __constant_cpu_to_le16(0x0002), /* v2.0 */ - .bDeviceClass = USB_CLASS_HUB, - .bDeviceSubClass = 0, - .bDeviceProtocol = USB_HUB_PR_HS_MULTI_TT, - .bMaxPacketSize0 = 64, - .idVendor = 0x0000, - .idProduct = 0x0000, - .bcdDevice = __constant_cpu_to_le16(0x0001), - .iManufacturer = 1, - .iProduct = 2, - .iSerialNumber = 0, - .bNumConfigurations = 1 - }, - .config = { - .bLength = USB_DT_CONFIG_SIZE, - .bDescriptorType = USB_DT_CONFIG, - .wTotalLength = __constant_cpu_to_le16(USB_DT_CONFIG_SIZE + - USB_DT_INTERFACE_SIZE + USB_DT_ENDPOINT_SIZE), - .bNumInterfaces = 1, - .bConfigurationValue = 1, - .iConfiguration = 0, - .bmAttributes = USB_CONFIG_ATT_SELFPOWER, - .bMaxPower = 0 - }, - .interface = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = 0, - .bAlternateSetting = 0, - .bNumEndpoints = 1, - .bInterfaceClass = USB_CLASS_HUB, - .bInterfaceSubClass = 0, - .bInterfaceProtocol = 0, - .iInterface = 0 - }, - .endpoint = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = 0x81, /* UE_DIR_IN | EHCI_INTR_ENDPT */ - .bmAttributes = USB_ENDPOINT_XFER_INT, - .wMaxPacketSize = __constant_cpu_to_le16((USB_MAXCHILDREN + 1 + 7) / 8), - .bInterval = 255 - } -}; - -static void xhci_setup_common_hub_descriptor(struct xhci_hcd *xhci, - struct usb_hub_descriptor *desc, int ports) -{ - u16 val; - - /* xhci section 5.4.9 says 20ms max */ - desc->bPwrOn2PwrGood = 10; - desc->bHubContrCurrent = 0; - desc->bNbrPorts = xhci->num_usb_ports; - - val = 0; - /* Bits 1:0 - support per-port power switching, or power always on */ - if (HCC_PPC(xhci->hcc_params)) - val |= HUB_CHAR_INDV_PORT_LPSM; - else - val |= HUB_CHAR_NO_LPSM; - /* Bit 2 - root hubs are not part of a compound device */ - /* Bits 4:3 - individual port over current protection */ - val |= HUB_CHAR_INDV_PORT_OCPM; - /* Bits 6:5 - no TTs in root ports */ - /* Bit 7 - no port indicators */ - desc->wHubCharacteristics = cpu_to_le16(val); -} - -static void xhci_setup_usb2_hub_descriptor(struct xhci_hcd *xhci) -{ - struct usb_hub_descriptor *desc = &xhci->usb_info.hub; - __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8]; - int ports; - u32 portsc; - u16 val; - int i; - - ports = xhci->num_usb_ports; - xhci_setup_common_hub_descriptor(xhci, desc, ports); - desc->bDescriptorType = USB_DT_HUB; - val = 1 + (ports / 8); - desc->bLength = USB_DT_HUB_NONVAR_SIZE + 2 * val; - - /* The Device Removable bits are reported on a byte granularity. - * If the port doesn't exist within that byte, the bit is set to 0. - */ - memset(port_removable, 0, sizeof(port_removable)); - for (i = 0; i < ports; i++) { - portsc = readl(xhci->usb_ports[i]); - /* If a device is removable, PORTSC reports a 0, same as in the - * hub descriptor DeviceRemovable bits. - */ - if (portsc & PORT_DEV_REMOVE) - /* This math is hairy because bit 0 of DeviceRemovable - * is reserved, and bit 1 is for port 1, etc. - */ - port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8); - } - - /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN - * ports on it. The USB 2.0 specification says that there are two - * variable length fields at the end of the hub descriptor: - * DeviceRemovable and PortPwrCtrlMask. But since we can have less than - * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array - * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to - * 0xFF, so we initialize the both arrays (DeviceRemovable and - * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each - * set of ports that actually exist. - */ - memset(desc->u.hs.DeviceRemovable, 0xff, - sizeof(desc->u.hs.DeviceRemovable)); - memset(desc->u.hs.PortPwrCtrlMask, 0xff, - sizeof(desc->u.hs.PortPwrCtrlMask)); - - for (i = 0; i < (ports + 1 + 7) / 8; i++) - memset(&desc->u.hs.DeviceRemovable[i], port_removable[i], - sizeof(__u8)); -} - -/* FIXME: usb core does not know about USB_SPEED_SUPER at all */ -static __maybe_unused void xhci_setup_usb3_hub_descriptor(struct xhci_hcd *xhci) -{ - struct usb_hub_descriptor *desc = &xhci->usb_info.hub; - int ports; - u16 port_removable; - u32 portsc; - int i; - - ports = xhci->num_usb_ports; - xhci_setup_common_hub_descriptor(xhci, desc, ports); - desc->bDescriptorType = USB_DT_SS_HUB; - desc->bLength = USB_DT_SS_HUB_SIZE; - /* - * header decode latency should be zero for roothubs, - * see section 4.23.5.2. - */ - desc->u.ss.bHubHdrDecLat = 0; - desc->u.ss.wHubDelay = 0; - port_removable = 0; - /* bit 0 is reserved, bit 1 is for port 1, etc. */ - for (i = 0; i < ports; i++) { - portsc = readl(xhci->usb_ports[i]); - if (portsc & PORT_DEV_REMOVE) - port_removable |= 1 << (i + 1); - } - desc->u.ss.DeviceRemovable = cpu_to_le16(port_removable); -} - -static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, - __le32 __iomem *addr, u8 major_revision, int max_caps) -{ - u32 reg, port_offset, port_count; - int i; - - if (major_revision > 0x03) { - dev_warn(xhci->dev, "Ignoring unknown port speed, Ext Cap %p, rev %02x\n", - addr, major_revision); - return; - } - - /* Port offset and count in the third dword, see section 7.2 */ - reg = readl(addr + 2); - port_offset = XHCI_EXT_PORT_OFF(reg); - port_count = XHCI_EXT_PORT_COUNT(reg); - - /* Port count includes the current port offset */ - if (port_offset == 0 || (port_offset + port_count - 1) > num_ports) - /* WTF? "Valid values are ‘1’ to MaxPorts" */ - return; - - /* cache usb2 port capabilities */ - if (major_revision < 0x03 && xhci->num_ext_caps < max_caps) - xhci->ext_caps[xhci->num_ext_caps++] = reg; - - port_offset--; - for (i = port_offset; i < (port_offset + port_count); i++) { - /* Duplicate entry. Ignore the port if the revisions differ. */ - if (xhci->port_array[i] != 0) { - dev_warn(xhci->dev, "Duplicate port entry, Ext Cap %p, port %u\n", - addr, i); - dev_warn(xhci->dev, "Port was marked as USB %u, duplicated as USB %u\n", - xhci->port_array[i], major_revision); - /* - * Only adjust the roothub port counts if we haven't - * found a similar duplicate. - */ - if (xhci->port_array[i] != major_revision && - xhci->port_array[i] != DUPLICATE_ENTRY) { - xhci->num_usb_ports--; - xhci->port_array[i] = DUPLICATE_ENTRY; - } - continue; - } - xhci->port_array[i] = major_revision; - xhci->num_usb_ports++; - } -} - -int xhci_hub_setup_ports(struct xhci_hcd *xhci) -{ - u32 offset, tmp_offset; - __le32 __iomem *addr, *tmp_addr; - unsigned int num_ports; - int i, cap_count = 0; - - offset = HCC_EXT_CAPS(xhci->hcc_params); - if (offset == 0) { - dev_err(xhci->dev, "No Extended Capability Registers\n"); - return -ENODEV; - } - - addr = &xhci->cap_regs->hc_capbase + offset; - - /* count extended protocol capability entries for later caching */ - tmp_addr = addr; - tmp_offset = offset; - do { - u32 cap_id = readl(tmp_addr); - - if (XHCI_EXT_CAPS_ID(cap_id) == XHCI_EXT_CAPS_PROTOCOL) - cap_count++; - - tmp_offset = XHCI_EXT_CAPS_NEXT(cap_id); - tmp_addr += tmp_offset; - } while (tmp_offset); - - num_ports = HCS_MAX_PORTS(xhci->hcs_params1); - xhci->port_array = xzalloc(num_ports * sizeof(*xhci->port_array)); - xhci->ext_caps = xzalloc(cap_count * sizeof(*xhci->ext_caps)); - - while (1) { - u32 cap_id = readl(addr); - - if (XHCI_EXT_CAPS_ID(cap_id) == XHCI_EXT_CAPS_PROTOCOL) - xhci_add_in_port(xhci, num_ports, addr, - (u8)XHCI_EXT_PORT_MAJOR(cap_id), - cap_count); - offset = XHCI_EXT_CAPS_NEXT(cap_id); - if (!offset || xhci->num_usb_ports == num_ports) - break; - addr += offset; - } - - if (xhci->num_usb_ports == 0) { - dev_err(xhci->dev, "No ports on the roothubs?\n"); - return -ENODEV; - } - - xhci->usb_ports = xzalloc(num_ports * sizeof(*xhci->usb_ports)); - for (i = 0; i < num_ports; i++) - xhci->usb_ports[i] = &xhci->op_regs->port_status_base + - NUM_PORT_REGS * i; - memcpy(&xhci->usb_info, &usb_rh_info, sizeof(usb_rh_info)); - xhci_setup_usb2_hub_descriptor(xhci); - - return 0; -} - -/* - * These bits are Read Only (RO) and should be saved and written to the - * registers: 0, 3, 10:13, 30 - * connect status, over-current status, port speed, and device removable. - * connect status and port speed are also sticky - meaning they're in - * the AUX well and they aren't changed by a hot, warm, or cold reset. - */ -#define XHCI_PORT_RO (PORT_CONNECT | PORT_OC | DEV_SPEED_MASK | \ - PORT_DEV_REMOVE) -/* - * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: - * bits 5:8, 9, 14:15, 25:27 - * link state, port power, port indicator state, "wake on" enable state - */ -#define XHCI_PORT_RWS (PORT_PLS_MASK | PORT_POWER | PORT_LED_MASK | \ - PORT_WKCONN_E | PORT_WKDISC_E | PORT_WKOC_E) -/* - * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: - * bit 4 (port reset) - */ -#define XHCI_PORT_RW1S (PORT_RESET) -/* - * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: - * bits 1, 17, 18, 19, 20, 21, 22, 23 - * port enable/disable, and - * change bits: connect, PED, warm port reset changed (reserved 0 for USB 2.0), - * over-current, reset, link state, and L1 change - */ -#define XHCI_PORT_RW1CS (PORT_PE | PORT_CSC | PORT_PEC | PORT_WRC | \ - PORT_OCC | PORT_RC | PORT_PLC | PORT_CEC) -/* - * Bit 16 is RW, and writing a '1' to it causes the link state control to be - * latched in - */ -#define XHCI_PORT_RW (PORT_LINK_STROBE) -/* - * These bits are Reserved Zero (RsvdZ) and zero should be written to them: - * bits 2, 24, 28:31 - */ -#define XHCI_PORT_RZ (BIT(2) | BIT(24) | (0xf<<28)) - -/* - * Given a port state, this function returns a value that would result in the - * port being in the same state, if the value was written to the port status - * control register. - * Save Read Only (RO) bits and save read/write bits where - * writing a 0 clears the bit and writing a 1 sets the bit (RWS). - * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect. - */ -static u32 inline xhci_port_state_to_neutral(u32 state) -{ - /* Save read-only status and port state */ - return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS); -} - -static int xhci_hub_finish_port_detach(struct xhci_hcd *xhci, int port) -{ - struct xhci_virtual_device *vdev, *temp; - union xhci_trb trb; - int ret; - - ret = xhci_wait_for_event(xhci, TRB_PORT_STATUS, &trb); - if (ret) - return ret; - - /* Tear-down any attached virtual devices */ - list_for_each_entry_safe(vdev, temp, &xhci->vdev_list, list) - if (vdev->udev && vdev->udev->portnr == port) - xhci_virtdev_detach(vdev); - - return 0; -} - -static int xhci_hub_finish_port_reset(struct xhci_hcd *xhci, int port) -{ - struct xhci_virtual_device *vdev; - union xhci_trb trb; - int ret; - - ret = xhci_wait_for_event(xhci, TRB_PORT_STATUS, &trb); - if (ret) - return ret; - - /* Reset any attached virtual devices */ - list_for_each_entry(vdev, &xhci->vdev_list, list) - if (vdev->udev && vdev->udev->portnr == port) - xhci_virtdev_reset(vdev); - - return 0; -} - -void xhci_hub_port_power(struct xhci_hcd *xhci, int port, - bool enable) -{ - u32 reg = readl(xhci->usb_ports[port]); - - reg = xhci_port_state_to_neutral(reg); - if (enable) - reg |= PORT_POWER; - else - reg &= ~PORT_POWER; - writel(reg, xhci->usb_ports[port]); -} - -static __maybe_unused int xhci_hub_port_warm_reset(struct xhci_hcd *xhci, int port) -{ - void __iomem *portsc = xhci->usb_ports[port]; - u32 reg; - - reg = xhci_port_state_to_neutral(readl(portsc)); - writel(reg | PORT_WR, portsc); - return xhci_handshake(portsc, PORT_RESET, 0, 10 * SECOND/USECOND); -} - -int xhci_hub_control(struct usb_device *dev, unsigned long pipe, - void *buffer, int length, struct devrequest *req) -{ - struct usb_host *host = dev->host; - struct xhci_hcd *xhci = to_xhci_hcd(host); - struct usb_root_hub_info *info; - __le32 __iomem **port_array; - int max_ports; - void *srcptr = NULL; - u8 tmpbuf[4]; - u16 typeReq; - int len, port, srclen = 0; - u32 reg; - - dev_dbg(xhci->dev, "%s req %u (%#x), type %u (%#x), value %u (%#x), index %u (%#x), length %u (%#x)\n", - __func__, req->request, req->request, - req->requesttype, req->requesttype, - le16_to_cpu(req->value), le16_to_cpu(req->value), - le16_to_cpu(req->index), le16_to_cpu(req->index), - le16_to_cpu(req->length), le16_to_cpu(req->length)); - - info = &xhci->usb_info; - port_array = xhci->usb_ports; - max_ports = xhci->num_usb_ports; - - typeReq = (req->requesttype << 8) | req->request; - switch (typeReq) { - case DeviceRequest | USB_REQ_GET_DESCRIPTOR: - dev_dbg(xhci->dev, "GetDeviceDescriptor %u\n", - le16_to_cpu(req->value) >> 8); - - switch (le16_to_cpu(req->value) >> 8) { - case USB_DT_DEVICE: - srcptr = &info->device; - srclen = info->device.bLength; - break; - case USB_DT_CONFIG: - srcptr = &info->config; - srclen = le16_to_cpu(info->config.wTotalLength); - break; - case USB_DT_STRING: - switch (le16_to_cpu(req->value) & 0xff) { - case 0: /* Language */ - srcptr = "\4\3\1\0"; - srclen = 4; - break; - case 1: /* Vendor: "barebox" */ - srcptr = "\20\3b\0a\0r\0e\0b\0o\0x\0"; - srclen = 16; - break; - case 2: /* Product: "USB 3.0 Root Hub" */ - srcptr = "\42\3U\0S\0B\0 \0\63\0.\0\60\0 \0R\0o\0o\0t\0 \0H\0u\0b"; - srclen = 34; - break; - default: - dev_warn(xhci->dev, "unknown string descriptor %x\n", - le16_to_cpu(req->value) >> 8); - goto unknown; - } - break; - } - break; - case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: - dev_dbg(xhci->dev, "SetDeviceConfiguration\n"); - /* Nothing to do */ - break; - case DeviceOutRequest | USB_REQ_SET_ADDRESS: - dev_dbg(xhci->dev, "SetDeviceAddress %u\n", - le16_to_cpu(req->value)); - - xhci->rootdev = le16_to_cpu(req->value); - break; - case GetHubDescriptor: - dev_dbg(xhci->dev, "GetHubDescriptor %u\n", - le16_to_cpu(req->value) >> 8); - - switch (le16_to_cpu(req->value) >> 8) { - case USB_DT_HUB: - srcptr = &info->hub; - srclen = info->hub.bLength; - break; - default: - dev_warn(xhci->dev, "unknown descriptor %x\n", - le16_to_cpu(req->value) >> 8); - goto unknown; - } - break; - case GetHubStatus: - dev_dbg(xhci->dev, "GetHubStatus\n"); - - /* No power source, over-current reported per port */ - tmpbuf[0] = 0x00; - tmpbuf[1] = 0x00; - srcptr = tmpbuf; - srclen = 2; - break; - case GetPortStatus: - dev_dbg(xhci->dev, "GetPortStatus %u\n", - le16_to_cpu(req->index)); - - memset(tmpbuf, 0, 4); - - port = le16_to_cpu(req->index); - if (!port || port > max_ports) - goto unknown; - port--; - - /* read PORTSC register */ - reg = readl(port_array[port]); - - if (reg & PORT_CONNECT) { - tmpbuf[0] |= USB_PORT_STAT_CONNECTION; - if (DEV_LOWSPEED(reg)) - tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8; - else if (DEV_HIGHSPEED(reg)) - tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8; - } - if (reg & PORT_PE) - tmpbuf[0] |= USB_PORT_STAT_ENABLE; - if (reg & PORT_OC) - tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT; - if (reg & PORT_RESET) - tmpbuf[0] |= USB_PORT_STAT_RESET; - /* USB 2.0 only */ - if ((reg & PORT_PLS_MASK) == XDEV_U3 && reg & PORT_POWER) - tmpbuf[0] |= USB_PORT_STAT_SUSPEND; - /* USB 2.0 only */ - if (reg & PORT_POWER) - tmpbuf[1] |= USB_PORT_STAT_POWER >> 8; - if (reg & PORT_CSC) - tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION; - if (reg & PORT_PEC) - tmpbuf[2] |= USB_PORT_STAT_C_ENABLE; - if (reg & PORT_OCC) - tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT; - if (reg & PORT_RC) - tmpbuf[2] |= USB_PORT_STAT_C_RESET; - srcptr = tmpbuf; - srclen = 4; - break; - case ClearPortFeature: - dev_dbg(xhci->dev, "ClearPortFeature %u %u\n", - le16_to_cpu(req->index), le16_to_cpu(req->value)); - - port = le16_to_cpu(req->index); - if (!port || port > max_ports) - goto unknown; - port--; - - reg = xhci_port_state_to_neutral(readl(port_array[port])); - - switch (le16_to_cpu(req->value)) { - case USB_PORT_FEAT_ENABLE: - reg &= ~PORT_PE; - break; - case USB_PORT_FEAT_POWER: - reg &= ~PORT_POWER; - break; - case USB_PORT_FEAT_C_CONNECTION: - reg |= PORT_CSC; - break; - case USB_PORT_FEAT_C_ENABLE: - reg |= PORT_PEC; - break; - case USB_PORT_FEAT_C_OVER_CURRENT: - reg |= PORT_OCC; - break; - case USB_PORT_FEAT_C_RESET: - reg |= PORT_RC; - break; - default: - dev_warn(xhci->dev, "unknown feature %u\n", - le16_to_cpu(req->value)); - goto unknown; - } - writel(reg, port_array[port]); - readl(port_array[port]); - - if ((reg & PORT_CONNECT) == 0 && - le16_to_cpu(req->value) == USB_PORT_FEAT_C_CONNECTION) - xhci_hub_finish_port_detach(xhci, port + 1); - - break; - case SetPortFeature: - dev_dbg(xhci->dev, "SetPortFeature %u %u\n", - le16_to_cpu(req->index), le16_to_cpu(req->value)); - - port = le16_to_cpu(req->index); - if (!port || port > max_ports) - goto unknown; - port--; - - reg = xhci_port_state_to_neutral(readl(port_array[port])); - - switch (le16_to_cpu(req->value)) { - case USB_PORT_FEAT_POWER: - reg |= PORT_POWER; - break; - case USB_PORT_FEAT_RESET: - reg |= PORT_RESET; - break; - default: - dev_warn(xhci->dev, "unknown feature %u\n", - le16_to_cpu(req->value)); - goto unknown; - } - writel(reg, port_array[port]); - readl(port_array[port]); - - if (le16_to_cpu(req->value) == USB_PORT_FEAT_RESET) - xhci_hub_finish_port_reset(xhci, port + 1); - - break; - default: - dev_warn(xhci->dev, "unknown root hub request %u (%#x) type %u (%#x)\n", - req->request, req->request, - req->requesttype, req->requesttype); - goto unknown; - } - - len = min3(srclen, (int)le16_to_cpu(req->length), length); - if (srcptr && len) - memcpy(buffer, srcptr, len); - dev->act_len = len; - dev->status = 0; - - return 0; - -unknown: - dev->act_len = 0; - dev->status = USB_ST_STALLED; - return -ENOTSUPP; -} |