diff options
Diffstat (limited to 'drivers/usb/host/ehci-omap.c')
| -rw-r--r-- | drivers/usb/host/ehci-omap.c | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c new file mode 100644 index 000000000000..12f1ad2fd0e8 --- /dev/null +++ b/drivers/usb/host/ehci-omap.c @@ -0,0 +1,756 @@ +/* + * 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 23rd, 2009): + * - add kernel-doc + * - enable AUTOIDLE + * - move DPLL5 programming to clock fw + * - add suspend/resume + * - move workarounds to board-files + */ + +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/gpio.h> +#include <mach/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; +}; + +/*-------------------------------------------------------------------------*/ + +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; + + 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; + } + + 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)); + + /* cache this readonly data; minimize chip reads */ + omap->ehci->hcs_params = readl(&omap->ehci->caps->hcs_params); + + /* SET 1 micro-frame Interrupt interval */ + writel(readl(&omap->ehci->regs->command) | (1 << 16), + &omap->ehci->regs->command); + + 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: + 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); + + usb_remove_hcd(hcd); + omap_stop_ehc(omap, hcd); + iounmap(hcd->regs); + iounmap(omap->tll_base); + iounmap(omap->uhh_base); + usb_put_hcd(hcd); + + 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>"); + |