| /** |
| * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI |
| * |
| * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com |
| * Author: Keshava Munegowda <keshava_mgowda@ti.com> |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 of |
| * the License as published by the Free Software Foundation. |
| * |
| * 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, see <http://www.gnu.org/licenses/>. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/io.h> |
| #include <linux/err.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/platform_data/usb-omap.h> |
| |
| #define USBTLL_DRIVER_NAME "usbhs_tll" |
| |
| /* 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_FSLSMODE_SHIFT 24 |
| #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_CHANMODE_FSLS (1 << 1) |
| #define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0) |
| |
| #define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0 |
| #define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1 |
| #define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2 |
| #define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3 |
| #define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4 |
| #define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5 |
| #define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6 |
| #define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7 |
| #define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA |
| #define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB |
| |
| #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_REV2_TLL_CHANNEL_COUNT 2 |
| #define OMAP_TLL_CHANNEL_COUNT 3 |
| #define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0) |
| #define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1) |
| #define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2) |
| |
| /* Values of USBTLL_REVISION - Note: these are not given in the TRM */ |
| #define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */ |
| #define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */ |
| #define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */ |
| |
| #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL) |
| |
| struct usbtll_omap { |
| struct clk *usbtll_p1_fck; |
| struct clk *usbtll_p2_fck; |
| struct usbtll_omap_platform_data platdata; |
| /* secure the register updates */ |
| spinlock_t lock; |
| }; |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| const char usbtll_driver_name[] = USBTLL_DRIVER_NAME; |
| struct platform_device *tll_pdev; |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static inline void usbtll_write(void __iomem *base, u32 reg, u32 val) |
| { |
| __raw_writel(val, base + reg); |
| } |
| |
| static inline u32 usbtll_read(void __iomem *base, u32 reg) |
| { |
| return __raw_readl(base + reg); |
| } |
| |
| static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val) |
| { |
| __raw_writeb(val, base + reg); |
| } |
| |
| static inline u8 usbtll_readb(void __iomem *base, u8 reg) |
| { |
| return __raw_readb(base + reg); |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static bool is_ohci_port(enum usbhs_omap_port_mode pmode) |
| { |
| switch (pmode) { |
| case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0: |
| case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM: |
| case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0: |
| case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM: |
| case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0: |
| case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM: |
| case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0: |
| case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM: |
| case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0: |
| case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM: |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| /* |
| * convert the port-mode enum to a value we can use in the FSLSMODE |
| * field of USBTLL_CHANNEL_CONF |
| */ |
| static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode) |
| { |
| switch (mode) { |
| case OMAP_USBHS_PORT_MODE_UNUSED: |
| case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0: |
| return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0; |
| |
| case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM: |
| return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM; |
| |
| case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0: |
| return OMAP_TLL_FSLSMODE_3PIN_PHY; |
| |
| case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM: |
| return OMAP_TLL_FSLSMODE_4PIN_PHY; |
| |
| case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0: |
| return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0; |
| |
| case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM: |
| return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM; |
| |
| case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0: |
| return OMAP_TLL_FSLSMODE_3PIN_TLL; |
| |
| case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM: |
| return OMAP_TLL_FSLSMODE_4PIN_TLL; |
| |
| case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0: |
| return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0; |
| |
| case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM: |
| return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM; |
| default: |
| pr_warn("Invalid port mode, using default\n"); |
| return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0; |
| } |
| } |
| |
| /** |
| * usbtll_omap_probe - initialize TI-based HCDs |
| * |
| * Allocates basic resources for this USB host controller. |
| */ |
| static int __devinit usbtll_omap_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct usbtll_omap_platform_data *pdata = dev->platform_data; |
| void __iomem *base; |
| struct resource *res; |
| struct usbtll_omap *tll; |
| unsigned reg; |
| unsigned long flags; |
| int ret = 0; |
| int i, ver, count; |
| |
| dev_dbg(dev, "starting TI HSUSB TLL Controller\n"); |
| |
| tll = kzalloc(sizeof(struct usbtll_omap), GFP_KERNEL); |
| if (!tll) { |
| dev_err(dev, "Memory allocation failed\n"); |
| ret = -ENOMEM; |
| goto end; |
| } |
| |
| spin_lock_init(&tll->lock); |
| |
| for (i = 0; i < OMAP3_HS_USB_PORTS; i++) |
| tll->platdata.port_mode[i] = pdata->port_mode[i]; |
| |
| tll->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk"); |
| if (IS_ERR(tll->usbtll_p1_fck)) { |
| ret = PTR_ERR(tll->usbtll_p1_fck); |
| dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret); |
| goto err_tll; |
| } |
| |
| tll->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk"); |
| if (IS_ERR(tll->usbtll_p2_fck)) { |
| ret = PTR_ERR(tll->usbtll_p2_fck); |
| dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret); |
| goto err_usbtll_p1_fck; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res) { |
| dev_err(dev, "usb tll get resource failed\n"); |
| ret = -ENODEV; |
| goto err_usbtll_p2_fck; |
| } |
| |
| base = ioremap(res->start, resource_size(res)); |
| if (!base) { |
| dev_err(dev, "TLL ioremap failed\n"); |
| ret = -ENOMEM; |
| goto err_usbtll_p2_fck; |
| } |
| |
| platform_set_drvdata(pdev, tll); |
| pm_runtime_enable(dev); |
| pm_runtime_get_sync(dev); |
| |
| spin_lock_irqsave(&tll->lock, flags); |
| |
| ver = usbtll_read(base, OMAP_USBTLL_REVISION); |
| switch (ver) { |
| case OMAP_USBTLL_REV1: |
| case OMAP_USBTLL_REV2: |
| count = OMAP_TLL_CHANNEL_COUNT; |
| break; |
| case OMAP_USBTLL_REV3: |
| count = OMAP_REV2_TLL_CHANNEL_COUNT; |
| break; |
| default: |
| dev_err(dev, "TLL version failed\n"); |
| ret = -ENODEV; |
| goto err_ioremap; |
| } |
| |
| if (is_ehci_tll_mode(pdata->port_mode[0]) || |
| is_ehci_tll_mode(pdata->port_mode[1]) || |
| is_ehci_tll_mode(pdata->port_mode[2]) || |
| is_ohci_port(pdata->port_mode[0]) || |
| is_ohci_port(pdata->port_mode[1]) || |
| is_ohci_port(pdata->port_mode[2])) { |
| |
| /* Program Common TLL register */ |
| reg = usbtll_read(base, OMAP_TLL_SHARED_CONF); |
| reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON |
| | OMAP_TLL_SHARED_CONF_USB_DIVRATION); |
| reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN; |
| reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN; |
| |
| usbtll_write(base, OMAP_TLL_SHARED_CONF, reg); |
| |
| /* Enable channels now */ |
| for (i = 0; i < count; i++) { |
| reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i)); |
| |
| if (is_ohci_port(pdata->port_mode[i])) { |
| reg |= ohci_omap3_fslsmode(pdata->port_mode[i]) |
| << OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT; |
| reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS; |
| } else if (pdata->port_mode[i] == |
| OMAP_EHCI_PORT_MODE_TLL) { |
| /* |
| * Disable AutoIdle, BitStuffing |
| * and use SDR Mode |
| */ |
| reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE |
| | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF |
| | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE); |
| } else { |
| continue; |
| } |
| reg |= OMAP_TLL_CHANNEL_CONF_CHANEN; |
| usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg); |
| |
| usbtll_writeb(base, |
| OMAP_TLL_ULPI_SCRATCH_REGISTER(i), |
| 0xbe); |
| } |
| } |
| |
| err_ioremap: |
| spin_unlock_irqrestore(&tll->lock, flags); |
| iounmap(base); |
| pm_runtime_put_sync(dev); |
| tll_pdev = pdev; |
| if (!ret) |
| goto end; |
| pm_runtime_disable(dev); |
| |
| err_usbtll_p2_fck: |
| clk_put(tll->usbtll_p2_fck); |
| |
| err_usbtll_p1_fck: |
| clk_put(tll->usbtll_p1_fck); |
| |
| err_tll: |
| kfree(tll); |
| |
| end: |
| return ret; |
| } |
| |
| /** |
| * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs |
| * @pdev: USB Host Controller being removed |
| * |
| * Reverses the effect of usbtll_omap_probe(). |
| */ |
| static int __devexit usbtll_omap_remove(struct platform_device *pdev) |
| { |
| struct usbtll_omap *tll = platform_get_drvdata(pdev); |
| |
| clk_put(tll->usbtll_p2_fck); |
| clk_put(tll->usbtll_p1_fck); |
| pm_runtime_disable(&pdev->dev); |
| kfree(tll); |
| return 0; |
| } |
| |
| static int usbtll_runtime_resume(struct device *dev) |
| { |
| struct usbtll_omap *tll = dev_get_drvdata(dev); |
| struct usbtll_omap_platform_data *pdata = &tll->platdata; |
| unsigned long flags; |
| |
| dev_dbg(dev, "usbtll_runtime_resume\n"); |
| |
| if (!pdata) { |
| dev_dbg(dev, "missing platform_data\n"); |
| return -ENODEV; |
| } |
| |
| spin_lock_irqsave(&tll->lock, flags); |
| |
| if (is_ehci_tll_mode(pdata->port_mode[0])) |
| clk_enable(tll->usbtll_p1_fck); |
| |
| if (is_ehci_tll_mode(pdata->port_mode[1])) |
| clk_enable(tll->usbtll_p2_fck); |
| |
| spin_unlock_irqrestore(&tll->lock, flags); |
| |
| return 0; |
| } |
| |
| static int usbtll_runtime_suspend(struct device *dev) |
| { |
| struct usbtll_omap *tll = dev_get_drvdata(dev); |
| struct usbtll_omap_platform_data *pdata = &tll->platdata; |
| unsigned long flags; |
| |
| dev_dbg(dev, "usbtll_runtime_suspend\n"); |
| |
| if (!pdata) { |
| dev_dbg(dev, "missing platform_data\n"); |
| return -ENODEV; |
| } |
| |
| spin_lock_irqsave(&tll->lock, flags); |
| |
| if (is_ehci_tll_mode(pdata->port_mode[0])) |
| clk_disable(tll->usbtll_p1_fck); |
| |
| if (is_ehci_tll_mode(pdata->port_mode[1])) |
| clk_disable(tll->usbtll_p2_fck); |
| |
| spin_unlock_irqrestore(&tll->lock, flags); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops usbtllomap_dev_pm_ops = { |
| SET_RUNTIME_PM_OPS(usbtll_runtime_suspend, |
| usbtll_runtime_resume, |
| NULL) |
| }; |
| |
| static struct platform_driver usbtll_omap_driver = { |
| .driver = { |
| .name = (char *)usbtll_driver_name, |
| .owner = THIS_MODULE, |
| .pm = &usbtllomap_dev_pm_ops, |
| }, |
| .probe = usbtll_omap_probe, |
| .remove = __devexit_p(usbtll_omap_remove), |
| }; |
| |
| int omap_tll_enable(void) |
| { |
| if (!tll_pdev) { |
| pr_err("missing omap usbhs tll platform_data\n"); |
| return -ENODEV; |
| } |
| return pm_runtime_get_sync(&tll_pdev->dev); |
| } |
| EXPORT_SYMBOL_GPL(omap_tll_enable); |
| |
| int omap_tll_disable(void) |
| { |
| if (!tll_pdev) { |
| pr_err("missing omap usbhs tll platform_data\n"); |
| return -ENODEV; |
| } |
| return pm_runtime_put_sync(&tll_pdev->dev); |
| } |
| EXPORT_SYMBOL_GPL(omap_tll_disable); |
| |
| MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>"); |
| MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers"); |
| |
| static int __init omap_usbtll_drvinit(void) |
| { |
| return platform_driver_register(&usbtll_omap_driver); |
| } |
| |
| /* |
| * init before usbhs core driver; |
| * The usbtll driver should be initialized before |
| * the usbhs core driver probe function is called. |
| */ |
| fs_initcall(omap_usbtll_drvinit); |
| |
| static void __exit omap_usbtll_drvexit(void) |
| { |
| platform_driver_unregister(&usbtll_omap_driver); |
| } |
| module_exit(omap_usbtll_drvexit); |