/* * ehci-omap.c - driver for USBHOST on OMAP 34xx processor * * Bus Glue for OMAP34xx USBHOST 3 port EHCI controller * Tested on OMAP3430 ES2.0 SDP * * Copyright (C) 2007-2008 Texas Instruments, Inc. * Author: Vikram Pandita * * Copyright (C) 2009 Nokia Corporation * Contact: Felipe Balbi * * Based on "ehci-fsl.c" and "ehci-au1xxx.c" ehci glue layers * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * TODO (last updated Feb 12, 2010): * - add kernel-doc * - enable AUTOIDLE * - add suspend/resume * - move workarounds to board-files */ #include #include #include #include #include #include #include /* * OMAP USBHOST Register addresses: VIRTUAL ADDRESSES * Use ehci_omap_readl()/ehci_omap_writel() functions */ /* TLL Register Set */ #define OMAP_USBTLL_REVISION (0x00) #define OMAP_USBTLL_SYSCONFIG (0x10) #define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8) #define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3) #define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2) #define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1) #define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0) #define OMAP_USBTLL_SYSSTATUS (0x14) #define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0) #define OMAP_USBTLL_IRQSTATUS (0x18) #define OMAP_USBTLL_IRQENABLE (0x1C) #define OMAP_TLL_SHARED_CONF (0x30) #define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6) #define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5) #define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2) #define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1) #define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0) #define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num) #define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11) #define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10) #define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9) #define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8) #define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0) #define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num) #define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num) #define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num) #define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num) #define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num) #define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num) #define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num) #define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num) #define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num) #define OMAP_TLL_CHANNEL_COUNT 3 #define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 1) #define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 2) #define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 4) /* UHH Register Set */ #define OMAP_UHH_REVISION (0x00) #define OMAP_UHH_SYSCONFIG (0x10) #define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12) #define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8) #define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3) #define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2) #define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1) #define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0) #define OMAP_UHH_SYSSTATUS (0x14) #define OMAP_UHH_HOSTCONFIG (0x40) #define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0) #define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0) #define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11) #define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12) #define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2) #define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3) #define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4) #define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5) #define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8) #define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9) #define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10) #define OMAP_UHH_DEBUG_CSR (0x44) /* EHCI Register Set */ #define EHCI_INSNREG04 (0xA0) #define EHCI_INSNREG04_DISABLE_UNSUSPEND (1 << 5) #define EHCI_INSNREG05_ULPI (0xA4) #define EHCI_INSNREG05_ULPI_CONTROL_SHIFT 31 #define EHCI_INSNREG05_ULPI_PORTSEL_SHIFT 24 #define EHCI_INSNREG05_ULPI_OPSEL_SHIFT 22 #define EHCI_INSNREG05_ULPI_REGADD_SHIFT 16 #define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8 #define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0 /*-------------------------------------------------------------------------*/ static inline void ehci_omap_writel(void __iomem *base, u32 reg, u32 val) { __raw_writel(val, base + reg); } static inline u32 ehci_omap_readl(void __iomem *base, u32 reg) { return __raw_readl(base + reg); } static inline void ehci_omap_writeb(void __iomem *base, u8 reg, u8 val) { __raw_writeb(val, base + reg); } static inline u8 ehci_omap_readb(void __iomem *base, u8 reg) { return __raw_readb(base + reg); } /*-------------------------------------------------------------------------*/ struct ehci_hcd_omap { struct ehci_hcd *ehci; struct device *dev; struct clk *usbhost_ick; struct clk *usbhost2_120m_fck; struct clk *usbhost1_48m_fck; struct clk *usbtll_fck; struct clk *usbtll_ick; /* FIXME the following two workarounds are * board specific not silicon-specific so these * should be moved to board-file instead. * * Maybe someone from TI will know better which * board is affected and needs the workarounds * to be applied */ /* gpio for resetting phy */ int reset_gpio_port[OMAP3_HS_USB_PORTS]; /* phy reset workaround */ int phy_reset; /* desired phy_mode: TLL, PHY */ enum ehci_hcd_omap_mode port_mode[OMAP3_HS_USB_PORTS]; void __iomem *uhh_base; void __iomem *tll_base; void __iomem *ehci_base; /* Regulators for USB PHYs. * Each PHY can have a separate regulator. */ struct regulator *regulator[OMAP3_HS_USB_PORTS]; }; /*-------------------------------------------------------------------------*/ static void omap_usb_utmi_init(struct ehci_hcd_omap *omap, u8 tll_channel_mask) { unsigned reg; int i; /* Program the 3 TLL channels upfront */ for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) { reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i)); /* Disable AutoIdle, BitStuffing and use SDR Mode */ reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE); ehci_omap_writel(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i), reg); } /* Program Common TLL register */ reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_SHARED_CONF); reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON | OMAP_TLL_SHARED_CONF_USB_DIVRATION | OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN); reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN; ehci_omap_writel(omap->tll_base, OMAP_TLL_SHARED_CONF, reg); /* Enable channels now */ for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) { reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i)); /* Enable only the reg that is needed */ if (!(tll_channel_mask & 1<tll_base, OMAP_TLL_CHANNEL_CONF(i), reg); ehci_omap_writeb(omap->tll_base, OMAP_TLL_ULPI_SCRATCH_REGISTER(i), 0xbe); dev_dbg(omap->dev, "ULPI_SCRATCH_REG[ch=%d]= 0x%02x\n", i+1, ehci_omap_readb(omap->tll_base, OMAP_TLL_ULPI_SCRATCH_REGISTER(i))); } } /*-------------------------------------------------------------------------*/ static void omap_ehci_soft_phy_reset(struct ehci_hcd_omap *omap, u8 port) { unsigned long timeout = jiffies + msecs_to_jiffies(1000); unsigned reg = 0; reg = ULPI_FUNC_CTRL_RESET /* FUNCTION_CTRL_SET register */ | (ULPI_SET(ULPI_FUNC_CTRL) << EHCI_INSNREG05_ULPI_REGADD_SHIFT) /* Write */ | (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT) /* PORTn */ | ((port + 1) << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT) /* start ULPI access*/ | (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT); ehci_omap_writel(omap->ehci_base, EHCI_INSNREG05_ULPI, reg); /* Wait for ULPI access completion */ while ((ehci_omap_readl(omap->ehci_base, EHCI_INSNREG05_ULPI) & (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT))) { cpu_relax(); if (time_after(jiffies, timeout)) { dev_dbg(omap->dev, "phy reset operation timed out\n"); break; } } } /* omap_start_ehc * - Start the TI USBHOST controller */ static int omap_start_ehc(struct ehci_hcd_omap *omap, struct usb_hcd *hcd) { unsigned long timeout = jiffies + msecs_to_jiffies(1000); u8 tll_ch_mask = 0; unsigned reg = 0; int ret = 0; dev_dbg(omap->dev, "starting TI EHCI USB Controller\n"); /* Enable Clocks for USBHOST */ omap->usbhost_ick = clk_get(omap->dev, "usbhost_ick"); if (IS_ERR(omap->usbhost_ick)) { ret = PTR_ERR(omap->usbhost_ick); goto err_host_ick; } clk_enable(omap->usbhost_ick); omap->usbhost2_120m_fck = clk_get(omap->dev, "usbhost_120m_fck"); if (IS_ERR(omap->usbhost2_120m_fck)) { ret = PTR_ERR(omap->usbhost2_120m_fck); goto err_host_120m_fck; } clk_enable(omap->usbhost2_120m_fck); omap->usbhost1_48m_fck = clk_get(omap->dev, "usbhost_48m_fck"); if (IS_ERR(omap->usbhost1_48m_fck)) { ret = PTR_ERR(omap->usbhost1_48m_fck); goto err_host_48m_fck; } clk_enable(omap->usbhost1_48m_fck); if (omap->phy_reset) { /* Refer: ISSUE1 */ if (gpio_is_valid(omap->reset_gpio_port[0])) { gpio_request(omap->reset_gpio_port[0], "USB1 PHY reset"); gpio_direction_output(omap->reset_gpio_port[0], 0); } if (gpio_is_valid(omap->reset_gpio_port[1])) { gpio_request(omap->reset_gpio_port[1], "USB2 PHY reset"); gpio_direction_output(omap->reset_gpio_port[1], 0); } /* Hold the PHY in RESET for enough time till DIR is high */ udelay(10); } /* Configure TLL for 60Mhz clk for ULPI */ omap->usbtll_fck = clk_get(omap->dev, "usbtll_fck"); if (IS_ERR(omap->usbtll_fck)) { ret = PTR_ERR(omap->usbtll_fck); goto err_tll_fck; } clk_enable(omap->usbtll_fck); omap->usbtll_ick = clk_get(omap->dev, "usbtll_ick"); if (IS_ERR(omap->usbtll_ick)) { ret = PTR_ERR(omap->usbtll_ick); goto err_tll_ick; } clk_enable(omap->usbtll_ick); /* perform TLL soft reset, and wait until reset is complete */ ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG, OMAP_USBTLL_SYSCONFIG_SOFTRESET); /* Wait for TLL reset to complete */ while (!(ehci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS) & OMAP_USBTLL_SYSSTATUS_RESETDONE)) { cpu_relax(); if (time_after(jiffies, timeout)) { dev_dbg(omap->dev, "operation timed out\n"); ret = -EINVAL; goto err_sys_status; } } dev_dbg(omap->dev, "TLL RESET DONE\n"); /* (1<<3) = no idle mode only for initial debugging */ ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG, OMAP_USBTLL_SYSCONFIG_ENAWAKEUP | OMAP_USBTLL_SYSCONFIG_SIDLEMODE | OMAP_USBTLL_SYSCONFIG_CACTIVITY); /* Put UHH in NoIdle/NoStandby mode */ reg = ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSCONFIG); reg |= (OMAP_UHH_SYSCONFIG_ENAWAKEUP | OMAP_UHH_SYSCONFIG_SIDLEMODE | OMAP_UHH_SYSCONFIG_CACTIVITY | OMAP_UHH_SYSCONFIG_MIDLEMODE); reg &= ~OMAP_UHH_SYSCONFIG_AUTOIDLE; ehci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG, reg); reg = ehci_omap_readl(omap->uhh_base, OMAP_UHH_HOSTCONFIG); /* setup ULPI bypass and burst configurations */ reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN); reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN; if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_UNKNOWN) reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS; if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_UNKNOWN) reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS; if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_UNKNOWN) reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS; /* Bypass the TLL module for PHY mode operation */ if (cpu_is_omap3430() && (omap_rev() <= OMAP3430_REV_ES2_1)) { dev_dbg(omap->dev, "OMAP3 ES version <= ES2.1\n"); if ((omap->port_mode[0] == EHCI_HCD_OMAP_MODE_PHY) || (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_PHY) || (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_PHY)) reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; else reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; } else { dev_dbg(omap->dev, "OMAP3 ES version > ES2.1\n"); if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_PHY) reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; else if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL) reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_PHY) reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS; else if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL) reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS; if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_PHY) reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS; else if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL) reg |= OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS; } ehci_omap_writel(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg); dev_dbg(omap->dev, "UHH setup done, uhh_hostconfig=%x\n", reg); /* * An undocumented "feature" in the OMAP3 EHCI controller, * causes suspended ports to be taken out of suspend when * the USBCMD.Run/Stop bit is cleared (for example when * we do ehci_bus_suspend). * This breaks suspend-resume if the root-hub is allowed * to suspend. Writing 1 to this undocumented register bit * disables this feature and restores normal behavior. */ ehci_omap_writel(omap->ehci_base, EHCI_INSNREG04, EHCI_INSNREG04_DISABLE_UNSUSPEND); if ((omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL) || (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL) || (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL)) { if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL) tll_ch_mask |= OMAP_TLL_CHANNEL_1_EN_MASK; if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL) tll_ch_mask |= OMAP_TLL_CHANNEL_2_EN_MASK; if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL) tll_ch_mask |= OMAP_TLL_CHANNEL_3_EN_MASK; /* Enable UTMI mode for required TLL channels */ omap_usb_utmi_init(omap, tll_ch_mask); } if (omap->phy_reset) { /* Refer ISSUE1: * Hold the PHY in RESET for enough time till * PHY is settled and ready */ udelay(10); if (gpio_is_valid(omap->reset_gpio_port[0])) gpio_set_value(omap->reset_gpio_port[0], 1); if (gpio_is_valid(omap->reset_gpio_port[1])) gpio_set_value(omap->reset_gpio_port[1], 1); } /* Soft reset the PHY using PHY reset command over ULPI */ if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_PHY) omap_ehci_soft_phy_reset(omap, 0); if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_PHY) omap_ehci_soft_phy_reset(omap, 1); return 0; err_sys_status: clk_disable(omap->usbtll_ick); clk_put(omap->usbtll_ick); err_tll_ick: clk_disable(omap->usbtll_fck); clk_put(omap->usbtll_fck); err_tll_fck: clk_disable(omap->usbhost1_48m_fck); clk_put(omap->usbhost1_48m_fck); if (omap->phy_reset) { if (gpio_is_valid(omap->reset_gpio_port[0])) gpio_free(omap->reset_gpio_port[0]); if (gpio_is_valid(omap->reset_gpio_port[1])) gpio_free(omap->reset_gpio_port[1]); } err_host_48m_fck: clk_disable(omap->usbhost2_120m_fck); clk_put(omap->usbhost2_120m_fck); err_host_120m_fck: clk_disable(omap->usbhost_ick); clk_put(omap->usbhost_ick); err_host_ick: return ret; } static void omap_stop_ehc(struct ehci_hcd_omap *omap, struct usb_hcd *hcd) { unsigned long timeout = jiffies + msecs_to_jiffies(100); dev_dbg(omap->dev, "stopping TI EHCI USB Controller\n"); /* Reset OMAP modules for insmod/rmmod to work */ ehci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG, OMAP_UHH_SYSCONFIG_SOFTRESET); while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS) & (1 << 0))) { cpu_relax(); if (time_after(jiffies, timeout)) dev_dbg(omap->dev, "operation timed out\n"); } while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS) & (1 << 1))) { cpu_relax(); if (time_after(jiffies, timeout)) dev_dbg(omap->dev, "operation timed out\n"); } while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS) & (1 << 2))) { cpu_relax(); if (time_after(jiffies, timeout)) dev_dbg(omap->dev, "operation timed out\n"); } ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG, (1 << 1)); while (!(ehci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS) & (1 << 0))) { cpu_relax(); if (time_after(jiffies, timeout)) dev_dbg(omap->dev, "operation timed out\n"); } if (omap->usbtll_fck != NULL) { clk_disable(omap->usbtll_fck); clk_put(omap->usbtll_fck); omap->usbtll_fck = NULL; } if (omap->usbhost_ick != NULL) { clk_disable(omap->usbhost_ick); clk_put(omap->usbhost_ick); omap->usbhost_ick = NULL; } if (omap->usbhost1_48m_fck != NULL) { clk_disable(omap->usbhost1_48m_fck); clk_put(omap->usbhost1_48m_fck); omap->usbhost1_48m_fck = NULL; } if (omap->usbhost2_120m_fck != NULL) { clk_disable(omap->usbhost2_120m_fck); clk_put(omap->usbhost2_120m_fck); omap->usbhost2_120m_fck = NULL; } if (omap->usbtll_ick != NULL) { clk_disable(omap->usbtll_ick); clk_put(omap->usbtll_ick); omap->usbtll_ick = NULL; } if (omap->phy_reset) { if (gpio_is_valid(omap->reset_gpio_port[0])) gpio_free(omap->reset_gpio_port[0]); if (gpio_is_valid(omap->reset_gpio_port[1])) gpio_free(omap->reset_gpio_port[1]); } dev_dbg(omap->dev, "Clock to USB host has been disabled\n"); } /*-------------------------------------------------------------------------*/ static const struct hc_driver ehci_omap_hc_driver; /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * ehci_hcd_omap_probe - initialize TI-based HCDs * * Allocates basic resources for this USB host controller, and * then invokes the start() method for the HCD associated with it * through the hotplug entry's driver_data. */ static int ehci_hcd_omap_probe(struct platform_device *pdev) { struct ehci_hcd_omap_platform_data *pdata = pdev->dev.platform_data; struct ehci_hcd_omap *omap; struct resource *res; struct usb_hcd *hcd; int irq = platform_get_irq(pdev, 0); int ret = -ENODEV; int i; char supply[7]; if (!pdata) { dev_dbg(&pdev->dev, "missing platform_data\n"); goto err_pdata; } if (usb_disabled()) goto err_disabled; omap = kzalloc(sizeof(*omap), GFP_KERNEL); if (!omap) { ret = -ENOMEM; goto err_disabled; } hcd = usb_create_hcd(&ehci_omap_hc_driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { dev_dbg(&pdev->dev, "failed to create hcd with err %d\n", ret); ret = -ENOMEM; goto err_create_hcd; } platform_set_drvdata(pdev, omap); omap->dev = &pdev->dev; omap->phy_reset = pdata->phy_reset; omap->reset_gpio_port[0] = pdata->reset_gpio_port[0]; omap->reset_gpio_port[1] = pdata->reset_gpio_port[1]; omap->reset_gpio_port[2] = pdata->reset_gpio_port[2]; omap->port_mode[0] = pdata->port_mode[0]; omap->port_mode[1] = pdata->port_mode[1]; omap->port_mode[2] = pdata->port_mode[2]; omap->ehci = hcd_to_ehci(hcd); omap->ehci->sbrn = 0x20; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { dev_err(&pdev->dev, "EHCI ioremap failed\n"); ret = -ENOMEM; goto err_ioremap; } /* we know this is the memory we want, no need to ioremap again */ omap->ehci->caps = hcd->regs; omap->ehci_base = hcd->regs; res = platform_get_resource(pdev, IORESOURCE_MEM, 1); omap->uhh_base = ioremap(res->start, resource_size(res)); if (!omap->uhh_base) { dev_err(&pdev->dev, "UHH ioremap failed\n"); ret = -ENOMEM; goto err_uhh_ioremap; } res = platform_get_resource(pdev, IORESOURCE_MEM, 2); omap->tll_base = ioremap(res->start, resource_size(res)); if (!omap->tll_base) { dev_err(&pdev->dev, "TLL ioremap failed\n"); ret = -ENOMEM; goto err_tll_ioremap; } /* get ehci regulator and enable */ for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { if (omap->port_mode[i] != EHCI_HCD_OMAP_MODE_PHY) { omap->regulator[i] = NULL; continue; } snprintf(supply, sizeof(supply), "hsusb%d", i); omap->regulator[i] = regulator_get(omap->dev, supply); if (IS_ERR(omap->regulator[i])) { omap->regulator[i] = NULL; dev_dbg(&pdev->dev, "failed to get ehci port%d regulator\n", i); } else { regulator_enable(omap->regulator[i]); } } ret = omap_start_ehc(omap, hcd); if (ret) { dev_dbg(&pdev->dev, "failed to start ehci\n"); goto err_start; } omap->ehci->regs = hcd->regs + HC_LENGTH(readl(&omap->ehci->caps->hc_capbase)); dbg_hcs_params(omap->ehci, "reset"); dbg_hcc_params(omap->ehci, "reset"); /* cache this readonly data; minimize chip reads */ omap->ehci->hcs_params = readl(&omap->ehci->caps->hcs_params); ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); if (ret) { dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret); goto err_add_hcd; } /* root ports should always stay powered */ ehci_port_power(omap->ehci, 1); return 0; err_add_hcd: omap_stop_ehc(omap, hcd); err_start: for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { if (omap->regulator[i]) { regulator_disable(omap->regulator[i]); regulator_put(omap->regulator[i]); } } iounmap(omap->tll_base); err_tll_ioremap: iounmap(omap->uhh_base); err_uhh_ioremap: iounmap(hcd->regs); err_ioremap: usb_put_hcd(hcd); err_create_hcd: kfree(omap); err_disabled: err_pdata: return ret; } /* may be called without controller electrically present */ /* may be called with controller, bus, and devices active */ /** * ehci_hcd_omap_remove - shutdown processing for EHCI HCDs * @pdev: USB Host Controller being removed * * Reverses the effect of usb_ehci_hcd_omap_probe(), first invoking * the HCD's stop() method. It is always called from a thread * context, normally "rmmod", "apmd", or something similar. */ static int ehci_hcd_omap_remove(struct platform_device *pdev) { struct ehci_hcd_omap *omap = platform_get_drvdata(pdev); struct usb_hcd *hcd = ehci_to_hcd(omap->ehci); int i; usb_remove_hcd(hcd); omap_stop_ehc(omap, hcd); iounmap(hcd->regs); for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { if (omap->regulator[i]) { regulator_disable(omap->regulator[i]); regulator_put(omap->regulator[i]); } } iounmap(omap->tll_base); iounmap(omap->uhh_base); usb_put_hcd(hcd); kfree(omap); return 0; } static void ehci_hcd_omap_shutdown(struct platform_device *pdev) { struct ehci_hcd_omap *omap = platform_get_drvdata(pdev); struct usb_hcd *hcd = ehci_to_hcd(omap->ehci); if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); } static struct platform_driver ehci_hcd_omap_driver = { .probe = ehci_hcd_omap_probe, .remove = ehci_hcd_omap_remove, .shutdown = ehci_hcd_omap_shutdown, /*.suspend = ehci_hcd_omap_suspend, */ /*.resume = ehci_hcd_omap_resume, */ .driver = { .name = "ehci-omap", } }; /*-------------------------------------------------------------------------*/ static const struct hc_driver ehci_omap_hc_driver = { .description = hcd_name, .product_desc = "OMAP-EHCI Host Controller", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_MEMORY | HCD_USB2, /* * basic lifecycle operations */ .reset = ehci_init, .start = ehci_run, .stop = ehci_stop, .shutdown = ehci_shutdown, /* * managing i/o requests and associated device resources */ .urb_enqueue = ehci_urb_enqueue, .urb_dequeue = ehci_urb_dequeue, .endpoint_disable = ehci_endpoint_disable, .endpoint_reset = ehci_endpoint_reset, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, .bus_suspend = ehci_bus_suspend, .bus_resume = ehci_bus_resume, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, }; MODULE_ALIAS("platform:omap-ehci"); MODULE_AUTHOR("Texas Instruments, Inc."); MODULE_AUTHOR("Felipe Balbi ");