]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
USB: Add OMAP EHCI glue layer
authorVikram Pandita <vikram.pandita@ti.com>
Tue, 7 Apr 2009 22:37:51 +0000 (15:37 -0700)
committerTony Lindgren <tony@atomide.com>
Tue, 7 Apr 2009 22:37:51 +0000 (15:37 -0700)
Add OMAP EHCI glue layer

Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Acked-by: Kamat, Nishant <nskamat@ti.com>
drivers/usb/Kconfig
drivers/usb/host/Kconfig
drivers/usb/host/ehci-hcd.c
drivers/usb/host/ehci-omap.c [new file with mode: 0644]
drivers/usb/host/ehci-omap.h [new file with mode: 0644]

index c6c816b7ecb5d30cacf1dbfe4ca1115df3553788..7ba50d2135cde291af20ed1beb19bebd606b326e 100644 (file)
@@ -57,6 +57,7 @@ config USB_ARCH_HAS_EHCI
        default y if PPC_83xx
        default y if SOC_AU1200
        default y if ARCH_IXP4XX
+       default y if ARCH_OMAP34XX
        default PCI
 
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
index 845479f7c70773cacff061d3a04c0f3ca0b21d86..1091358d12bdd611af8d96416bce6156db4f6241 100644 (file)
@@ -38,6 +38,25 @@ config USB_EHCI_HCD
 
          To compile this driver as a module, choose M here: the
          module will be called ehci-hcd.
+choice
+       prompt "PHY/TLL mode"
+       depends on USB_EHCI_HCD && EXPERIMENTAL && ARCH_OMAP34XX
+       ---help---
+       Choose PHY or TLL mode of operation
+
+config OMAP_EHCI_PHY_MODE
+       bool "PHY mode: ISP1504 on Port1/2 (NEW 3430ES2.0)"
+       depends on USB_EHCI_HCD && EXPERIMENTAL && ARCH_OMAP34XX
+       ---help---
+         EHCI PHY mode. Port1 and Port2 are connected to ISP1504 transcievers
+
+config OMAP_EHCI_TLL_MODE
+       bool "TLL mode: (EXPERIMENTAL)"
+       depends on USB_EHCI_HCD && EXPERIMENTAL && ARCH_OMAP34XX
+       ---help---
+       OMAP EHCI controller has TLL mode of operation for all 3 ports.
+       Use this mode when no transciever is present
+endchoice
 
 config USB_EHCI_ROOT_HUB_TT
        bool "Root Hub Transaction Translators"
index c637207a1c80b63eab4bfa5587d4250bfe0d3c86..efca884e742b28f6619ce04817d71ddca2b574ec 100644 (file)
@@ -1052,6 +1052,11 @@ MODULE_LICENSE ("GPL");
 #define        PLATFORM_DRIVER         ehci_hcd_au1xxx_driver
 #endif
 
+#ifdef CONFIG_ARCH_OMAP34XX
+#include "ehci-omap.c"
+#define        PLATFORM_DRIVER         ehci_hcd_omap_driver
+#endif
+
 #ifdef CONFIG_PPC_PS3
 #include "ehci-ps3.c"
 #define        PS3_SYSTEM_BUS_DRIVER   ps3_ehci_driver
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
new file mode 100644 (file)
index 0000000..9bf3815
--- /dev/null
@@ -0,0 +1,578 @@
+/*
+ * 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>
+ *
+ * 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
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <mach/gpio.h>
+
+#include "ehci-omap.h"
+
+
+#ifdef CONFIG_OMAP_EHCI_PHY_MODE
+/* EHCI connected to External PHY */
+
+/* External USB connectivity board: 750-2083-001
+ * Connected to OMAP3430 SDP
+ * The board has Port1 and Port2 connected to ISP1504 in 12-pin ULPI mode
+ */
+
+/* ISSUE1:
+ *      ISP1504 for input clocking mode needs special reset handling
+ *     Hold the PHY in reset by asserting RESET_N signal
+ *     Then start the 60Mhz clock input to PHY
+ *     Release the reset after a delay -
+ *             to get the PHY state machine in working state
+ */
+#define EXTERNAL_PHY_RESET
+#define        EXT_PHY_RESET_GPIO_PORT1        (57)
+#define        EXT_PHY_RESET_GPIO_PORT2        (61)
+#define        EXT_PHY_RESET_DELAY             (10)
+
+/* ISSUE2:
+ * USBHOST supports External charge pump PHYs only
+ * Use the VBUS from Port1 to power VBUS of Port2 externally
+ * So use Port2 as the working ULPI port
+ */
+#define VBUS_INTERNAL_CHARGEPUMP_HACK
+
+#endif /* CONFIG_OMAP_EHCI_PHY_MODE */
+
+/*-------------------------------------------------------------------------*/
+
+/* Define USBHOST clocks for clock management */
+struct ehci_omap_clock_defs {
+       struct clk      *usbhost_ick_clk;
+       struct clk      *usbhost2_120m_fck_clk;
+       struct clk      *usbhost1_48m_fck_clk;
+       struct clk      *usbtll_fck_clk;
+       struct clk      *usbtll_ick_clk;
+};
+
+/* Clock names as per clock framework: May change so keep as #defs */
+#define USBHOST_ICKL           "usbhost_ick"
+#define USBHOST_120M_FCLK      "usbhost_120m_fck"
+#define USBHOST_48M_FCLK       "usbhost_48m_fck"
+#define USBHOST_TLL_ICKL       "usbtll_ick"
+#define USBHOST_TLL_FCLK       "usbtll_fck"
+/*-------------------------------------------------------------------------*/
+
+
+#ifndef CONFIG_OMAP_EHCI_PHY_MODE
+
+static void omap_usb_utmi_init(struct usb_hcd *hcd, u8 tll_channel_mask)
+{
+       int i;
+
+       /* Use UTMI Ports of TLL */
+       omap_writel((1 << OMAP_UHH_HOSTCONFIG_ULPI_BYPASS_SHIFT)|
+                       (1<<OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN_SHIFT)|
+                       (1<<OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN_SHIFT)|
+                       (1<<OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN_SHIFT)|
+                       (0<<OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN_SHIFT),
+                                               OMAP_UHH_HOSTCONFIG);
+       /* Enusre bit is set */
+       while (!(omap_readl(OMAP_UHH_HOSTCONFIG)
+                       & (1 << OMAP_UHH_HOSTCONFIG_ULPI_BYPASS_SHIFT)))
+               cpu_relax();
+
+       dev_dbg(hcd->self.controller, "\nEntered UTMI MODE: success\n");
+
+       /* Program the 3 TLL channels upfront */
+
+       for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
+
+               /* Disable AutoIdle */
+               omap_writel(omap_readl(OMAP_TLL_CHANNEL_CONF(i)) &
+                           ~(1<<OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE_SHIFT),
+                           OMAP_TLL_CHANNEL_CONF(i));
+               /* Disable BitStuffing */
+               omap_writel(omap_readl(OMAP_TLL_CHANNEL_CONF(i)) &
+                           ~(1<<OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF_SHIFT),
+                           OMAP_TLL_CHANNEL_CONF(i));
+               /* SDR Mode */
+               omap_writel(omap_readl(OMAP_TLL_CHANNEL_CONF(i)) &
+                           ~(1<<OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE_SHIFT),
+                           OMAP_TLL_CHANNEL_CONF(i));
+
+       }
+
+       /* Program Common TLL register */
+       omap_writel((1 << OMAP_TLL_SHARED_CONF_FCLK_IS_ON_SHIFT) |
+                       (1 << OMAP_TLL_SHARED_CONF_USB_DIVRATION_SHIFT) |
+                       (0 << OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN_SHIFT) |
+                       (0 << OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN_SHFT),
+                               OMAP_TLL_SHARED_CONF);
+
+       /* Enable channels now */
+       for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
+
+               /* Enable only the channel that is needed */
+               if (!(tll_channel_mask & 1<<i))
+                       continue;
+
+               omap_writel(omap_readl(OMAP_TLL_CHANNEL_CONF(i)) |
+                           (1<<OMAP_TLL_CHANNEL_CONF_CHANEN_SHIFT),
+                           OMAP_TLL_CHANNEL_CONF(i));
+
+               omap_writeb(0xBE, OMAP_TLL_ULPI_SCRATCH_REGISTER(i));
+               dev_dbg(hcd->self.controller, "\nULPI_SCRATCH_REG[ch=%d]"
+                       "= 0x%02x\n",
+                       i+1, omap_readb(OMAP_TLL_ULPI_SCRATCH_REGISTER(i)));
+       }
+}
+
+#else
+# define omap_usb_utmi_init(x, y)      0
+#endif
+
+
+/* omap_start_ehc
+ *     - Start the TI USBHOST controller
+ */
+static int omap_start_ehc(struct platform_device *dev, struct usb_hcd *hcd)
+{
+       struct ehci_omap_clock_defs *ehci_clocks;
+
+       dev_dbg(hcd->self.controller, "starting TI EHCI USB Controller\n");
+
+       ehci_clocks = (struct ehci_omap_clock_defs *)(
+                               ((char *)hcd_to_ehci(hcd)) +
+                                       sizeof(struct ehci_hcd));
+
+       /* Start DPLL5 Programming:
+        * Clock Framework is not doing this now:
+        * This will be done in clock framework later
+        */
+       /* Enable DPLL 5 : Based on Input of 13Mhz*/
+       cm_write_mod_reg((12 << OMAP3430ES2_PERIPH2_DPLL_DIV_SHIFT)|
+                       (120 << OMAP3430ES2_PERIPH2_DPLL_MULT_SHIFT),
+                       PLL_MOD, OMAP3430ES2_CM_CLKSEL4);
+
+       cm_write_mod_reg(1 << OMAP3430ES2_DIV_120M_SHIFT,
+                       PLL_MOD, OMAP3430ES2_CM_CLKSEL5);
+
+       cm_write_mod_reg((7 << OMAP3430ES2_PERIPH2_DPLL_FREQSEL_SHIFT) |
+                       (7 << OMAP3430ES2_EN_PERIPH2_DPLL_SHIFT),
+                       PLL_MOD, OMAP3430ES2_CM_CLKEN2);
+
+       while (!(cm_read_mod_reg(PLL_MOD, CM_IDLEST2) &
+                               OMAP3430ES2_ST_PERIPH2_CLK_MASK))
+               dev_dbg(hcd->self.controller,
+                       "idlest2 = 0x%x\n",
+                       cm_read_mod_reg(PLL_MOD, CM_IDLEST2));
+       /* End DPLL5 programming */
+
+
+       /* PRCM settings for USBHOST:
+        * Interface clk un-related to domain transition
+        */
+       cm_write_mod_reg(0 << OMAP3430ES2_AUTO_USBHOST_SHIFT,
+                               OMAP3430ES2_USBHOST_MOD, CM_AUTOIDLE);
+
+       /* Disable sleep dependency with MPU and IVA */
+       cm_write_mod_reg((0 << OMAP3430ES2_EN_MPU_SHIFT) |
+                               (0 << OMAP3430ES2_EN_IVA2_SHIFT),
+                               OMAP3430ES2_USBHOST_MOD, OMAP3430_CM_SLEEPDEP);
+
+       /* Disable Automatic transition of clock */
+       cm_write_mod_reg(0 << OMAP3430ES2_CLKTRCTRL_USBHOST_SHIFT,
+                               OMAP3430ES2_USBHOST_MOD, CM_CLKSTCTRL);
+
+       /* Enable Clocks for USBHOST */
+       ehci_clocks->usbhost_ick_clk = clk_get(&dev->dev,
+                                               USBHOST_ICKL);
+       if (IS_ERR(ehci_clocks->usbhost_ick_clk))
+               return PTR_ERR(ehci_clocks->usbhost_ick_clk);
+       clk_enable(ehci_clocks->usbhost_ick_clk);
+
+
+       ehci_clocks->usbhost2_120m_fck_clk = clk_get(&dev->dev,
+                                                       USBHOST_120M_FCLK);
+       if (IS_ERR(ehci_clocks->usbhost2_120m_fck_clk))
+               return PTR_ERR(ehci_clocks->usbhost2_120m_fck_clk);
+       clk_enable(ehci_clocks->usbhost2_120m_fck_clk);
+
+       ehci_clocks->usbhost1_48m_fck_clk = clk_get(&dev->dev,
+                                               USBHOST_48M_FCLK);
+       if (IS_ERR(ehci_clocks->usbhost1_48m_fck_clk))
+               return PTR_ERR(ehci_clocks->usbhost1_48m_fck_clk);
+       clk_enable(ehci_clocks->usbhost1_48m_fck_clk);
+
+
+#ifdef EXTERNAL_PHY_RESET
+       /* Refer: ISSUE1 */
+       gpio_request(EXT_PHY_RESET_GPIO_PORT1, "USB1 PHY reset");
+       gpio_direction_output(EXT_PHY_RESET_GPIO_PORT1, 0);
+       gpio_request(EXT_PHY_RESET_GPIO_PORT2, "USB2 PHY reset");
+       gpio_direction_output(EXT_PHY_RESET_GPIO_PORT2, 0);
+       /* Hold the PHY in RESET for enough time till DIR is high */
+       udelay(EXT_PHY_RESET_DELAY);
+#endif
+
+       /* Configure TLL for 60Mhz clk for ULPI */
+       ehci_clocks->usbtll_fck_clk = clk_get(&dev->dev, USBHOST_TLL_FCLK);
+       if (IS_ERR(ehci_clocks->usbtll_fck_clk))
+               return PTR_ERR(ehci_clocks->usbtll_fck_clk);
+       clk_enable(ehci_clocks->usbtll_fck_clk);
+
+       ehci_clocks->usbtll_ick_clk = clk_get(&dev->dev, USBHOST_TLL_ICKL);
+       if (IS_ERR(ehci_clocks->usbtll_ick_clk))
+               return PTR_ERR(ehci_clocks->usbtll_ick_clk);
+       clk_enable(ehci_clocks->usbtll_ick_clk);
+
+       /* Disable Auto Idle of USBTLL */
+       cm_write_mod_reg((0 << OMAP3430ES2_AUTO_USBTLL_SHIFT),
+                               CORE_MOD, CM_AUTOIDLE3);
+
+       /* Wait for TLL to be Active */
+       while ((cm_read_mod_reg(CORE_MOD, OMAP2430_CM_IDLEST3)
+                       & (1 << OMAP3430ES2_ST_USBTLL_SHIFT)))
+               cpu_relax();
+
+       /* perform TLL soft reset, and wait until reset is complete */
+       omap_writel(1 << OMAP_USBTLL_SYSCONFIG_SOFTRESET_SHIFT,
+                       OMAP_USBTLL_SYSCONFIG);
+       /* Wait for TLL reset to complete */
+       while (!(omap_readl(OMAP_USBTLL_SYSSTATUS)
+                       & (1 << OMAP_USBTLL_SYSSTATUS_RESETDONE_SHIFT)))
+               cpu_relax();
+
+       dev_dbg(hcd->self.controller, "TLL RESET DONE\n");
+
+       /* (1<<3) = no idle mode only for initial debugging */
+       omap_writel((1 << OMAP_USBTLL_SYSCONFIG_ENAWAKEUP_SHIFT) |
+                       (1 << OMAP_USBTLL_SYSCONFIG_SIDLEMODE_SHIFT) |
+                       (1 << OMAP_USBTLL_SYSCONFIG_CACTIVITY_SHIFT),
+                       OMAP_USBTLL_SYSCONFIG);
+
+
+       /* Put UHH in NoIdle/NoStandby mode */
+       omap_writel((0 << OMAP_UHH_SYSCONFIG_AUTOIDLE_SHIFT) |
+                       (1 << OMAP_UHH_SYSCONFIG_ENAWAKEUP_SHIFT) |
+                       (1 << OMAP_UHH_SYSCONFIG_SIDLEMODE_SHIFT) |
+                       (1 << OMAP_UHH_SYSCONFIG_CACTIVITY_SHIFT) |
+                       (1 << OMAP_UHH_SYSCONFIG_MIDLEMODE_SHIFT),
+                       OMAP_UHH_SYSCONFIG);
+
+#ifdef CONFIG_OMAP_EHCI_PHY_MODE
+       /* Bypass the TLL module for PHY mode operation */
+       omap_writel((0 << OMAP_UHH_HOSTCONFIG_ULPI_BYPASS_SHIFT)|
+                       (1<<OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN_SHIFT)|
+                       (1<<OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN_SHIFT)|
+                       (1<<OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN_SHIFT)|
+                       (0<<OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN_SHIFT),
+                                               OMAP_UHH_HOSTCONFIG);
+       /* Ensure that BYPASS is set */
+       while (omap_readl(OMAP_UHH_HOSTCONFIG)
+                       & (1 << OMAP_UHH_HOSTCONFIG_ULPI_BYPASS_SHIFT))
+               cpu_relax();
+
+       dev_dbg(hcd->self.controller, "Entered ULPI PHY MODE: success\n");
+
+#else
+       /* Enable UTMI mode for all 3 TLL channels */
+       omap_usb_utmi_init(hcd,
+               OMAP_TLL_CHANNEL_1_EN_MASK |
+               OMAP_TLL_CHANNEL_2_EN_MASK |
+               OMAP_TLL_CHANNEL_3_EN_MASK
+               );
+#endif
+
+#ifdef EXTERNAL_PHY_RESET
+       /* Refer ISSUE1:
+        * Hold the PHY in RESET for enough time till PHY is settled and ready
+        */
+       udelay(EXT_PHY_RESET_DELAY);
+       gpio_set_value(EXT_PHY_RESET_GPIO_PORT1, 1);
+       gpio_set_value(EXT_PHY_RESET_GPIO_PORT2, 1);
+#endif
+
+#ifdef VBUS_INTERNAL_CHARGEPUMP_HACK
+       /* Refer ISSUE2: LINK assumes external charge pump */
+
+       /* use Port1 VBUS to charge externally Port2:
+        *      So for PHY mode operation use Port2 only
+        */
+       omap_writel((0xA << EHCI_INSNREG05_ULPI_REGADD_SHIFT) |/* OTG ctrl reg*/
+                       (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT) |/*   Write */
+                       (1 << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT) |/* Port1 */
+                       (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT) |/* Start */
+                       (0x26),
+                       EHCI_INSNREG05_ULPI);
+
+       while (!(omap_readl(EHCI_INSNREG05_ULPI)
+                       & (1<<EHCI_INSNREG05_ULPI_CONTROL_SHIFT)))
+               cpu_relax();
+
+#endif
+
+       return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void omap_stop_ehc(struct platform_device *dev, struct usb_hcd *hcd)
+{
+       struct ehci_omap_clock_defs *ehci_clocks;
+
+       ehci_clocks = (struct ehci_omap_clock_defs *)
+                       (((char *)hcd_to_ehci(hcd)) + sizeof(struct ehci_hcd));
+
+       dev_dbg(hcd->self.controller, "stopping TI EHCI USB Controller\n");
+
+       /* Reset OMAP modules for insmod/rmmod to work */
+       omap_writel((1<<1), OMAP_UHH_SYSCONFIG);
+       while (!(omap_readl(OMAP_UHH_SYSSTATUS) & (1<<0)))
+               cpu_relax();
+       while (!(omap_readl(OMAP_UHH_SYSSTATUS) & (1<<1)))
+               cpu_relax();
+       while (!(omap_readl(OMAP_UHH_SYSSTATUS) & (1<<2)))
+               cpu_relax();
+       dev_dbg(hcd->self.controller,
+               "UHH RESET DONE OMAP_UHH_SYSSTATUS %x !!\n",
+                       omap_readl(OMAP_UHH_SYSSTATUS));
+
+       omap_writel((1<<1), OMAP_USBTLL_SYSCONFIG);
+       while (!(omap_readl(OMAP_USBTLL_SYSSTATUS) & (1<<0)))
+               cpu_relax();
+       dev_dbg(hcd->self.controller, "TLL RESET DONE\n");
+
+       if (ehci_clocks->usbtll_fck_clk != NULL) {
+               clk_disable(ehci_clocks->usbtll_fck_clk);
+               clk_put(ehci_clocks->usbtll_fck_clk);
+               ehci_clocks->usbtll_fck_clk = NULL;
+       }
+
+       if (ehci_clocks->usbhost_ick_clk != NULL) {
+               clk_disable(ehci_clocks->usbhost_ick_clk);
+               clk_put(ehci_clocks->usbhost_ick_clk);
+               ehci_clocks->usbhost_ick_clk = NULL;
+       }
+
+       if (ehci_clocks->usbhost1_48m_fck_clk != NULL) {
+               clk_disable(ehci_clocks->usbhost1_48m_fck_clk);
+               clk_put(ehci_clocks->usbhost1_48m_fck_clk);
+               ehci_clocks->usbhost1_48m_fck_clk = NULL;
+       }
+
+       if (ehci_clocks->usbhost2_120m_fck_clk != NULL) {
+               clk_disable(ehci_clocks->usbhost2_120m_fck_clk);
+               clk_put(ehci_clocks->usbhost2_120m_fck_clk);
+               ehci_clocks->usbhost2_120m_fck_clk = NULL;
+       }
+
+       if (ehci_clocks->usbtll_ick_clk != NULL) {
+               clk_disable(ehci_clocks->usbtll_ick_clk);
+               clk_put(ehci_clocks->usbtll_ick_clk);
+               ehci_clocks->usbtll_ick_clk = NULL;
+       }
+
+
+#ifdef EXTERNAL_PHY_RESET
+       gpio_free(EXT_PHY_RESET_GPIO_PORT1);
+       gpio_free(EXT_PHY_RESET_GPIO_PORT2);
+#endif
+
+       dev_dbg(hcd->self.controller,
+               "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_drv_probe - initialize TI-based HCDs
+ * Context: !in_interrupt()
+ *
+ * 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_drv_probe(struct platform_device *dev)
+{
+       int retval = 0;
+       struct usb_hcd *hcd;
+       struct ehci_hcd *ehci;
+
+       dev_dbg(&dev->dev, "ehci_hcd_omap_drv_probe()\n");
+
+       if (usb_disabled())
+               return -ENODEV;
+
+       if (dev->resource[1].flags != IORESOURCE_IRQ) {
+               dev_dbg(&dev->dev, "resource[1] is not IORESOURCE_IRQ\n");
+               retval = -ENOMEM;
+       }
+
+       hcd = usb_create_hcd(&ehci_omap_hc_driver, &dev->dev,
+                       dev_name(&dev->dev));
+       if (!hcd)
+               return -ENOMEM;
+
+       retval = omap_start_ehc(dev, hcd);
+       if (retval)
+               return retval;
+
+       hcd->rsrc_start = 0;
+       hcd->rsrc_len = 0;
+       hcd->rsrc_start = dev->resource[0].start;
+       hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
+
+       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+       if (!hcd->regs) {
+               dev_err(&dev->dev, "ioremap failed\n");
+               return -ENOMEM;
+       }
+
+       ehci = hcd_to_ehci(hcd);
+       ehci->caps = hcd->regs;
+
+       ehci->sbrn = 0x20;
+
+       ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
+       /* cache this readonly data; minimize chip reads */
+       ehci->hcs_params = readl(&ehci->caps->hcs_params);
+
+       /* SET 1 micro-frame Interrupt interval */
+       writel(readl(&ehci->regs->command) | (1<<16), &ehci->regs->command);
+
+       retval = usb_add_hcd(hcd, dev->resource[1].start,
+                               IRQF_DISABLED | IRQF_SHARED);
+       if (retval == 0)
+               return retval;
+
+       dev_dbg(hcd->self.controller, "ERR: add_hcd\n");
+       omap_stop_ehc(dev, hcd);
+       iounmap(hcd->regs);
+       usb_put_hcd(hcd);
+
+       return retval;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * ehci_hcd_omap_drv_remove - shutdown processing for EHCI HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * 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_drv_remove(struct platform_device *dev)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(dev);
+
+       dev_dbg(&dev->dev, "ehci_hcd_omap_drv_remove()\n");
+
+       iounmap(hcd->regs);
+       usb_remove_hcd(hcd);
+       usb_put_hcd(hcd);
+       omap_stop_ehc(dev, hcd);
+
+       return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+#ifdef CONFIG_PM
+static int omap_ehci_bus_suspend(struct usb_hcd *hcd)
+{
+       return ehci_bus_suspend(hcd);
+}
+
+static int omap_ehci_bus_resume(struct usb_hcd *hcd)
+{
+       return ehci_bus_resume(hcd);
+}
+#endif
+/*-------------------------------------------------------------------------*/
+
+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)
+                               + sizeof(struct ehci_omap_clock_defs),
+
+       /*
+        * 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,
+
+       /*
+        * scheduling support
+        */
+       .get_frame_number = ehci_get_frame,
+
+       /*
+        * root hub support
+        */
+       .hub_status_data = ehci_hub_status_data,
+       .hub_control = ehci_hub_control,
+#ifdef CONFIG_PM
+       .bus_suspend = omap_ehci_bus_suspend,
+       .bus_resume = omap_ehci_bus_resume,
+#endif
+};
+
+/*-------------------------------------------------------------------------*/
+MODULE_ALIAS("platform:omap-ehci");
+static struct platform_driver ehci_hcd_omap_driver = {
+       .probe = ehci_hcd_omap_drv_probe,
+       .remove = ehci_hcd_omap_drv_remove,
+       .shutdown = usb_hcd_platform_shutdown,
+       /*.suspend      = ehci_hcd_omap_drv_suspend, */
+       /*.resume       = ehci_hcd_omap_drv_resume, */
+       .driver = {
+               .name = "ehci-omap",
+               .bus = &platform_bus_type
+       }
+};
diff --git a/drivers/usb/host/ehci-omap.h b/drivers/usb/host/ehci-omap.h
new file mode 100644 (file)
index 0000000..9e4378f
--- /dev/null
@@ -0,0 +1,125 @@
+/*
+ * ehci-omap.h - register definitions for USBHOST in OMAP 34xx
+ *
+ * Copyright (C) 2007-2008 Texas Instruments, Inc.
+ *     Author: Vikram Pandita <vikram.pandita@ti.com>
+ *
+ * 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
+ *
+ */
+
+#ifndef __EHCI_OMAP_H
+#define __EHCI_OMAP_H
+
+#include <mach/hardware.h>
+#include "../../../arch/arm/mach-omap2/cm.h"
+#include "../../../arch/arm/mach-omap2/cm-regbits-34xx.h"
+
+/*
+ * OMAP USBHOST Register addresses: PHYSICAL ADDRESSES
+ *     Use omap_readl()/omap_writel() functions
+ */
+
+/* USBHOST: TLL, UUH, OHCI, EHCI */
+#define        OMAP_USBHOST_BASE       (L4_34XX_BASE + 0x60000)
+
+/* TLL Register Set */
+#define        OMAP_USBHOST_TLL_BASE   (OMAP_USBHOST_BASE + 0x2000)
+#define        OMAP_USBTLL_REVISION    (OMAP_USBHOST_TLL_BASE + 0x00)
+#define        OMAP_USBTLL_SYSCONFIG   (OMAP_USBHOST_TLL_BASE + 0x10)
+       #define OMAP_USBTLL_SYSCONFIG_CACTIVITY_SHIFT   8
+       #define OMAP_USBTLL_SYSCONFIG_SIDLEMODE_SHIFT   3
+       #define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP_SHIFT   2
+       #define OMAP_USBTLL_SYSCONFIG_SOFTRESET_SHIFT   1
+       #define OMAP_USBTLL_SYSCONFIG_AUTOIDLE_SHIFT    0
+#define        OMAP_USBTLL_SYSSTATUS   (OMAP_USBHOST_TLL_BASE + 0x14)
+       #define OMAP_USBTLL_SYSSTATUS_RESETDONE_SHIFT   0
+#define        OMAP_USBTLL_IRQSTATUS   (OMAP_USBHOST_TLL_BASE + 0x18)
+#define        OMAP_USBTLL_IRQENABLE   (OMAP_USBHOST_TLL_BASE + 0x1C)
+
+#define        OMAP_TLL_SHARED_CONF    (OMAP_USBHOST_TLL_BASE + 0x30)
+       #define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN_SHFT        6
+       #define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN_SHIFT      5
+       #define OMAP_TLL_SHARED_CONF_USB_DIVRATION_SHIFT        2
+       #define OMAP_TLL_SHARED_CONF_FCLK_REQ_SHIFT             1
+       #define OMAP_TLL_SHARED_CONF_FCLK_IS_ON_SHIFT           0
+
+#define        OMAP_TLL_CHANNEL_CONF(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x040 + 0x004 * num))
+       #define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF_SHIFT      11
+       #define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE_SHIFT   10
+       #define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE_SHIFT        9
+       #define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE_SHIFT         8
+       #define OMAP_TLL_CHANNEL_CONF_CHANEN_SHIFT              0
+
+#define        OMAP_TLL_ULPI_FUNCTION_CTRL(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x804 + 0x100 * num))
+#define        OMAP_TLL_ULPI_INTERFACE_CTRL(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x807 + 0x100 * num))
+#define        OMAP_TLL_ULPI_OTG_CTRL(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x80A + 0x100 * num))
+#define        OMAP_TLL_ULPI_INT_EN_RISE(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x80D + 0x100 * num))
+#define        OMAP_TLL_ULPI_INT_EN_FALL(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x810 + 0x100 * num))
+#define        OMAP_TLL_ULPI_INT_STATUS(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x813 + 0x100 * num))
+#define        OMAP_TLL_ULPI_INT_LATCH(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x814 + 0x100 * num))
+#define        OMAP_TLL_ULPI_DEBUG(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x815 + 0x100 * num))
+#define        OMAP_TLL_ULPI_SCRATCH_REGISTER(num)\
+                       (OMAP_USBHOST_TLL_BASE + (0x816 + 0x100 * num))
+
+#define OMAP_TLL_CHANNEL_COUNT         3
+       #define OMAP_TLL_CHANNEL_1_EN_MASK      1
+       #define OMAP_TLL_CHANNEL_2_EN_MASK      2
+       #define OMAP_TLL_CHANNEL_3_EN_MASK      4
+
+/* UHH Register Set */
+#define        OMAP_USBHOST_UHH_BASE   (OMAP_USBHOST_BASE + 0x4000)
+#define        OMAP_UHH_REVISION       (OMAP_USBHOST_UHH_BASE + 0x00)
+#define        OMAP_UHH_SYSCONFIG      (OMAP_USBHOST_UHH_BASE + 0x10)
+       #define OMAP_UHH_SYSCONFIG_MIDLEMODE_SHIFT      12
+       #define OMAP_UHH_SYSCONFIG_CACTIVITY_SHIFT      8
+       #define OMAP_UHH_SYSCONFIG_SIDLEMODE_SHIFT      3
+       #define OMAP_UHH_SYSCONFIG_ENAWAKEUP_SHIFT      2
+       #define OMAP_UHH_SYSCONFIG_SOFTRESET_SHIFT      1
+       #define OMAP_UHH_SYSCONFIG_AUTOIDLE_SHIFT       0
+
+#define        OMAP_UHH_SYSSTATUS      (OMAP_USBHOST_UHH_BASE + 0x14)
+#define        OMAP_UHH_HOSTCONFIG     (OMAP_USBHOST_UHH_BASE + 0x40)
+       #define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS_SHIFT   0
+       #define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN_SHIFT        2
+       #define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN_SHIFT        3
+       #define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN_SHIFT       4
+       #define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN_SHIFT        5
+
+#define        OMAP_UHH_DEBUG_CSR      (OMAP_USBHOST_UHH_BASE + 0x44)
+
+/* EHCI Register Set */
+#define        OMAP_USBHOST_EHCI_BASE  (OMAP_USBHOST_BASE + 0x4800)
+#define        EHCI_INSNREG05_ULPI             (OMAP_USBHOST_EHCI_BASE + 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
+
+/* OHCI Register Set */
+#define        OMAP_USBHOST_OHCI_BASE  (OMAP_USBHOST_BASE + 0x4400)
+
+#endif/* __EHCI_OMAP_H*/