| /* |
| * 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 <vikram.pandita@ti.com> |
| * |
| * Copyright (C) 2009 Nokia Corporation |
| * Contact: Felipe Balbi <felipe.balbi@nokia.com> |
| * |
| * 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 <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/gpio.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/slab.h> |
| #include <plat/usb.h> |
| |
| /* |
| * 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_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 seperate 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<<i)) |
| continue; |
| |
| reg |= OMAP_TLL_CHANNEL_CONF_CHANEN; |
| ehci_omap_writel(omap->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))); |
| } |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* 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 (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); |
| |
| |
| 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); |
| } |
| |
| 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; |
| } |
| |
| 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 <felipe.balbi@nokia.com>"); |
| |