diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-19 18:01:00 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-19 18:01:00 +0300 |
commit | f62c1930674913b18daaa608c348000ff124a481 (patch) | |
tree | 9f26748195ab1348083e6384d2ee2e4a32c5aa01 /drivers/usb/host/xhci-tegra.c | |
parent | 23a73711facabb9dbf36b31ce05196cef5020e0b (diff) | |
parent | b4e19931c98a088fbd80b5c3f892261c9a0e6c23 (diff) | |
download | linux-f62c1930674913b18daaa608c348000ff124a481.tar.xz |
Merge tag 'tegra-for-5.7-usb-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into usb-next
Thierry writes:
usb: tegra: Changes for v5.7-rc1
These changes add USB OTG support for the XUSB host and XUSB device
controllers found on NVIDIA Tegra SoCs.
* tag 'tegra-for-5.7-usb-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
usb: gadget: tegra-xudc: Support multiple device modes
usb: gadget: tegra-xudc: Use phy_set_mode() to set/unset device mode
usb: gadget: tegra-xudc: Add usb-phy support
usb: gadget: tegra-xudc: Remove usb-role-switch support
usb: xhci-tegra: Add OTG support
phy: tegra: Select USB_PHY
phy: tegra: Don't use device-managed API to allocate ports
phy: tegra: Fix regulator leak
phy: tegra: Print -EPROBE_DEFER error message at debug level
phy: tegra: xusb: Don't warn on probe defer
phy: tegra: xusb: Add Tegra194 support
phy: tegra: xusb: Protect Tegra186 soc with config
phy: tegra: xusb: Add set_mode support for UTMI phy on Tegra186
phy: tegra: xusb: Add set_mode support for USB 2 phy on Tegra210
phy: tegra: xusb: Add support to get companion USB 3 port
phy: tegra: xusb: Add usb-phy support
phy: tegra: xusb: Add usb-role-switch support
Diffstat (limited to 'drivers/usb/host/xhci-tegra.c')
-rw-r--r-- | drivers/usb/host/xhci-tegra.c | 228 |
1 files changed, 227 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c index a6e36b3c968f..2eaf5c0af80c 100644 --- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -24,6 +24,9 @@ #include <linux/regulator/consumer.h> #include <linux/reset.h> #include <linux/slab.h> +#include <linux/usb/otg.h> +#include <linux/usb/phy.h> +#include <linux/usb/role.h> #include <soc/tegra/pmc.h> #include "xhci.h" @@ -204,6 +207,7 @@ struct tegra_xusb_soc { bool scale_ss_clock; bool has_ipfs; bool lpm_support; + bool otg_reset_sspi; }; struct tegra_xusb_context { @@ -251,6 +255,14 @@ struct tegra_xusb { struct phy **phys; unsigned int num_phys; + struct usb_phy **usbphy; + unsigned int num_usb_phys; + int otg_usb2_port; + int otg_usb3_port; + bool host_mode; + struct notifier_block id_nb; + struct work_struct id_work; + /* Firmware loading related */ struct { size_t size; @@ -1082,6 +1094,205 @@ static int tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra) return err; } +static void tegra_xhci_set_port_power(struct tegra_xusb *tegra, bool main, + bool set) +{ + struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); + struct usb_hcd *hcd = main ? xhci->main_hcd : xhci->shared_hcd; + unsigned int wait = (!main && !set) ? 1000 : 10; + u16 typeReq = set ? SetPortFeature : ClearPortFeature; + u16 wIndex = main ? tegra->otg_usb2_port + 1 : tegra->otg_usb3_port + 1; + u32 status; + u32 stat_power = main ? USB_PORT_STAT_POWER : USB_SS_PORT_STAT_POWER; + u32 status_val = set ? stat_power : 0; + + dev_dbg(tegra->dev, "%s():%s %s port power\n", __func__, + set ? "set" : "clear", main ? "HS" : "SS"); + + hcd->driver->hub_control(hcd, typeReq, USB_PORT_FEAT_POWER, wIndex, + NULL, 0); + + do { + tegra_xhci_hc_driver.hub_control(hcd, GetPortStatus, 0, wIndex, + (char *) &status, sizeof(status)); + if (status_val == (status & stat_power)) + break; + + if (!main && !set) + usleep_range(600, 700); + else + usleep_range(10, 20); + } while (--wait > 0); + + if (status_val != (status & stat_power)) + dev_info(tegra->dev, "failed to %s %s PP %d\n", + set ? "set" : "clear", + main ? "HS" : "SS", status); +} + +static struct phy *tegra_xusb_get_phy(struct tegra_xusb *tegra, char *name, + int port) +{ + unsigned int i, phy_count = 0; + + for (i = 0; i < tegra->soc->num_types; i++) { + if (!strncmp(tegra->soc->phy_types[i].name, "usb2", + strlen(name))) + return tegra->phys[phy_count+port]; + + phy_count += tegra->soc->phy_types[i].num; + } + + return NULL; +} + +static void tegra_xhci_id_work(struct work_struct *work) +{ + struct tegra_xusb *tegra = container_of(work, struct tegra_xusb, + id_work); + struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); + struct tegra_xusb_mbox_msg msg; + struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", + tegra->otg_usb2_port); + u32 status; + int ret; + + dev_dbg(tegra->dev, "host mode %s\n", tegra->host_mode ? "on" : "off"); + + mutex_lock(&tegra->lock); + + if (tegra->host_mode) + phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_HOST); + else + phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_NONE); + + mutex_unlock(&tegra->lock); + + if (tegra->host_mode) { + /* switch to host mode */ + if (tegra->otg_usb3_port >= 0) { + if (tegra->soc->otg_reset_sspi) { + /* set PP=0 */ + tegra_xhci_hc_driver.hub_control( + xhci->shared_hcd, GetPortStatus, + 0, tegra->otg_usb3_port+1, + (char *) &status, sizeof(status)); + if (status & USB_SS_PORT_STAT_POWER) + tegra_xhci_set_port_power(tegra, false, + false); + + /* reset OTG port SSPI */ + msg.cmd = MBOX_CMD_RESET_SSPI; + msg.data = tegra->otg_usb3_port+1; + + ret = tegra_xusb_mbox_send(tegra, &msg); + if (ret < 0) { + dev_info(tegra->dev, + "failed to RESET_SSPI %d\n", + ret); + } + } + + tegra_xhci_set_port_power(tegra, false, true); + } + + tegra_xhci_set_port_power(tegra, true, true); + + } else { + if (tegra->otg_usb3_port >= 0) + tegra_xhci_set_port_power(tegra, false, false); + + tegra_xhci_set_port_power(tegra, true, false); + } +} + +static int tegra_xusb_get_usb2_port(struct tegra_xusb *tegra, + struct usb_phy *usbphy) +{ + unsigned int i; + + for (i = 0; i < tegra->num_usb_phys; i++) { + if (tegra->usbphy[i] && usbphy == tegra->usbphy[i]) + return i; + } + + return -1; +} + +static int tegra_xhci_id_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct tegra_xusb *tegra = container_of(nb, struct tegra_xusb, + id_nb); + struct usb_phy *usbphy = (struct usb_phy *)data; + + dev_dbg(tegra->dev, "%s(): action is %d", __func__, usbphy->last_event); + + if ((tegra->host_mode && usbphy->last_event == USB_EVENT_ID) || + (!tegra->host_mode && usbphy->last_event != USB_EVENT_ID)) { + dev_dbg(tegra->dev, "Same role(%d) received. Ignore", + tegra->host_mode); + return NOTIFY_OK; + } + + tegra->otg_usb2_port = tegra_xusb_get_usb2_port(tegra, usbphy); + tegra->otg_usb3_port = tegra_xusb_padctl_get_usb3_companion( + tegra->padctl, + tegra->otg_usb2_port); + + tegra->host_mode = (usbphy->last_event == USB_EVENT_ID) ? true : false; + + schedule_work(&tegra->id_work); + + return NOTIFY_OK; +} + +static int tegra_xusb_init_usb_phy(struct tegra_xusb *tegra) +{ + unsigned int i; + + tegra->usbphy = devm_kcalloc(tegra->dev, tegra->num_usb_phys, + sizeof(*tegra->usbphy), GFP_KERNEL); + if (!tegra->usbphy) + return -ENOMEM; + + INIT_WORK(&tegra->id_work, tegra_xhci_id_work); + tegra->id_nb.notifier_call = tegra_xhci_id_notify; + + for (i = 0; i < tegra->num_usb_phys; i++) { + struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", i); + + if (!phy) + continue; + + tegra->usbphy[i] = devm_usb_get_phy_by_node(tegra->dev, + phy->dev.of_node, + &tegra->id_nb); + if (!IS_ERR(tegra->usbphy[i])) { + dev_dbg(tegra->dev, "usbphy-%d registered", i); + otg_set_host(tegra->usbphy[i]->otg, &tegra->hcd->self); + } else { + /* + * usb-phy is optional, continue if its not available. + */ + tegra->usbphy[i] = NULL; + } + } + + return 0; +} + +static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra) +{ + unsigned int i; + + cancel_work_sync(&tegra->id_work); + + for (i = 0; i < tegra->num_usb_phys; i++) + if (tegra->usbphy[i]) + otg_set_host(tegra->usbphy[i]->otg, NULL); +} + static int tegra_xusb_probe(struct platform_device *pdev) { struct tegra_xusb *tegra; @@ -1255,8 +1466,11 @@ static int tegra_xusb_probe(struct platform_device *pdev) goto put_powerdomains; } - for (i = 0; i < tegra->soc->num_types; i++) + for (i = 0; i < tegra->soc->num_types; i++) { + if (!strncmp(tegra->soc->phy_types[i].name, "usb2", 4)) + tegra->num_usb_phys = tegra->soc->phy_types[i].num; tegra->num_phys += tegra->soc->phy_types[i].num; + } tegra->phys = devm_kcalloc(&pdev->dev, tegra->num_phys, sizeof(*tegra->phys), GFP_KERNEL); @@ -1385,6 +1599,12 @@ static int tegra_xusb_probe(struct platform_device *pdev) goto remove_usb3; } + err = tegra_xusb_init_usb_phy(tegra); + if (err < 0) { + dev_err(&pdev->dev, "failed to init USB PHY: %d\n", err); + goto remove_usb3; + } + return 0; remove_usb3: @@ -1421,6 +1641,8 @@ static int tegra_xusb_remove(struct platform_device *pdev) struct tegra_xusb *tegra = platform_get_drvdata(pdev); struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); + tegra_xusb_deinit_usb_phy(tegra); + usb_remove_hcd(xhci->shared_hcd); usb_put_hcd(xhci->shared_hcd); xhci->shared_hcd = NULL; @@ -1695,6 +1917,7 @@ static const struct tegra_xusb_soc tegra124_soc = { }, .scale_ss_clock = true, .has_ipfs = true, + .otg_reset_sspi = false, .mbox = { .cmd = 0xe4, .data_in = 0xe8, @@ -1734,6 +1957,7 @@ static const struct tegra_xusb_soc tegra210_soc = { }, .scale_ss_clock = false, .has_ipfs = true, + .otg_reset_sspi = true, .mbox = { .cmd = 0xe4, .data_in = 0xe8, @@ -1774,6 +1998,7 @@ static const struct tegra_xusb_soc tegra186_soc = { }, .scale_ss_clock = false, .has_ipfs = false, + .otg_reset_sspi = false, .mbox = { .cmd = 0xe4, .data_in = 0xe8, @@ -1804,6 +2029,7 @@ static const struct tegra_xusb_soc tegra194_soc = { }, .scale_ss_clock = false, .has_ipfs = false, + .otg_reset_sspi = false, .mbox = { .cmd = 0x68, .data_in = 0x6c, |