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path: root/drivers/mfd/omap-usb-host.c
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Diffstat (limited to 'drivers/mfd/omap-usb-host.c')
-rw-r--r--drivers/mfd/omap-usb-host.c916
1 files changed, 916 insertions, 0 deletions
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
new file mode 100644
index 00000000000..b48d80c367f
--- /dev/null
+++ b/drivers/mfd/omap-usb-host.c
@@ -0,0 +1,916 @@
+/**
+ * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI
+ *
+ * Copyright (C) 2011-2013 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Keshava Munegowda <keshava_mgowda@ti.com>
+ * Author: Roger Quadros <rogerq@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/delay.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/usb-omap.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/err.h>
+
+#include "omap-usb.h"
+
+#define USBHS_DRIVER_NAME "usbhs_omap"
+#define OMAP_EHCI_DEVICE "ehci-omap"
+#define OMAP_OHCI_DEVICE "ohci-omap3"
+
+/* OMAP USBHOST Register addresses */
+
+/* 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 OMAP4_UHH_HOSTCONFIG_APP_START_CLK (1 << 31)
+
+/* OMAP4-specific defines */
+#define OMAP4_UHH_SYSCONFIG_IDLEMODE_CLEAR (3 << 2)
+#define OMAP4_UHH_SYSCONFIG_NOIDLE (1 << 2)
+#define OMAP4_UHH_SYSCONFIG_STDBYMODE_CLEAR (3 << 4)
+#define OMAP4_UHH_SYSCONFIG_NOSTDBY (1 << 4)
+#define OMAP4_UHH_SYSCONFIG_SOFTRESET (1 << 0)
+
+#define OMAP4_P1_MODE_CLEAR (3 << 16)
+#define OMAP4_P1_MODE_TLL (1 << 16)
+#define OMAP4_P1_MODE_HSIC (3 << 16)
+#define OMAP4_P2_MODE_CLEAR (3 << 18)
+#define OMAP4_P2_MODE_TLL (1 << 18)
+#define OMAP4_P2_MODE_HSIC (3 << 18)
+
+#define OMAP_UHH_DEBUG_CSR (0x44)
+
+/* Values of UHH_REVISION - Note: these are not given in the TRM */
+#define OMAP_USBHS_REV1 0x00000010 /* OMAP3 */
+#define OMAP_USBHS_REV2 0x50700100 /* OMAP4 */
+
+#define is_omap_usbhs_rev1(x) (x->usbhs_rev == OMAP_USBHS_REV1)
+#define is_omap_usbhs_rev2(x) (x->usbhs_rev == OMAP_USBHS_REV2)
+
+#define is_ehci_phy_mode(x) (x == OMAP_EHCI_PORT_MODE_PHY)
+#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
+#define is_ehci_hsic_mode(x) (x == OMAP_EHCI_PORT_MODE_HSIC)
+
+
+struct usbhs_hcd_omap {
+ int nports;
+ struct clk **utmi_clk;
+ struct clk **hsic60m_clk;
+ struct clk **hsic480m_clk;
+
+ struct clk *xclk60mhsp1_ck;
+ struct clk *xclk60mhsp2_ck;
+ struct clk *utmi_p1_gfclk;
+ struct clk *utmi_p2_gfclk;
+ struct clk *init_60m_fclk;
+ struct clk *ehci_logic_fck;
+
+ void __iomem *uhh_base;
+
+ struct usbhs_omap_platform_data *pdata;
+
+ u32 usbhs_rev;
+};
+/*-------------------------------------------------------------------------*/
+
+static const char usbhs_driver_name[] = USBHS_DRIVER_NAME;
+static u64 usbhs_dmamask = DMA_BIT_MASK(32);
+
+/*-------------------------------------------------------------------------*/
+
+static inline void usbhs_write(void __iomem *base, u32 reg, u32 val)
+{
+ writel_relaxed(val, base + reg);
+}
+
+static inline u32 usbhs_read(void __iomem *base, u32 reg)
+{
+ return readl_relaxed(base + reg);
+}
+
+static inline void usbhs_writeb(void __iomem *base, u8 reg, u8 val)
+{
+ writeb_relaxed(val, base + reg);
+}
+
+static inline u8 usbhs_readb(void __iomem *base, u8 reg)
+{
+ return readb_relaxed(base + reg);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/**
+ * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
+ * to the device tree binding portN-mode found in
+ * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
+ */
+static const char * const port_modes[] = {
+ [OMAP_USBHS_PORT_MODE_UNUSED] = "",
+ [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy",
+ [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll",
+ [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic",
+ [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0",
+ [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm",
+ [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0",
+ [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm",
+ [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0",
+ [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm",
+ [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0",
+ [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm",
+ [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0",
+ [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm",
+};
+
+/**
+ * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode'
+ * from the port mode string.
+ * @mode: The port mode string, usually obtained from device tree.
+ *
+ * The function returns the 'enum usbhs_omap_port_mode' that matches the
+ * provided port mode string as per the port_modes table.
+ * If no match is found it returns -ENODEV
+ */
+static const int omap_usbhs_get_dt_port_mode(const char *mode)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(port_modes); i++) {
+ if (!strcmp(mode, port_modes[i]))
+ return i;
+ }
+
+ return -ENODEV;
+}
+
+static struct platform_device *omap_usbhs_alloc_child(const char *name,
+ struct resource *res, int num_resources, void *pdata,
+ size_t pdata_size, struct device *dev)
+{
+ struct platform_device *child;
+ int ret;
+
+ child = platform_device_alloc(name, 0);
+
+ if (!child) {
+ dev_err(dev, "platform_device_alloc %s failed\n", name);
+ goto err_end;
+ }
+
+ ret = platform_device_add_resources(child, res, num_resources);
+ if (ret) {
+ dev_err(dev, "platform_device_add_resources failed\n");
+ goto err_alloc;
+ }
+
+ ret = platform_device_add_data(child, pdata, pdata_size);
+ if (ret) {
+ dev_err(dev, "platform_device_add_data failed\n");
+ goto err_alloc;
+ }
+
+ child->dev.dma_mask = &usbhs_dmamask;
+ dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32));
+ child->dev.parent = dev;
+
+ ret = platform_device_add(child);
+ if (ret) {
+ dev_err(dev, "platform_device_add failed\n");
+ goto err_alloc;
+ }
+
+ return child;
+
+err_alloc:
+ platform_device_put(child);
+
+err_end:
+ return NULL;
+}
+
+static int omap_usbhs_alloc_children(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
+ struct platform_device *ehci;
+ struct platform_device *ohci;
+ struct resource *res;
+ struct resource resources[2];
+ int ret;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci");
+ if (!res) {
+ dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n");
+ ret = -ENODEV;
+ goto err_end;
+ }
+ resources[0] = *res;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq");
+ if (!res) {
+ dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n");
+ ret = -ENODEV;
+ goto err_end;
+ }
+ resources[1] = *res;
+
+ ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata,
+ sizeof(*pdata), dev);
+
+ if (!ehci) {
+ dev_err(dev, "omap_usbhs_alloc_child failed\n");
+ ret = -ENOMEM;
+ goto err_end;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci");
+ if (!res) {
+ dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n");
+ ret = -ENODEV;
+ goto err_ehci;
+ }
+ resources[0] = *res;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq");
+ if (!res) {
+ dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n");
+ ret = -ENODEV;
+ goto err_ehci;
+ }
+ resources[1] = *res;
+
+ ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata,
+ sizeof(*pdata), dev);
+ if (!ohci) {
+ dev_err(dev, "omap_usbhs_alloc_child failed\n");
+ ret = -ENOMEM;
+ goto err_ehci;
+ }
+
+ return 0;
+
+err_ehci:
+ platform_device_unregister(ehci);
+
+err_end:
+ return ret;
+}
+
+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;
+ }
+}
+
+static int usbhs_runtime_resume(struct device *dev)
+{
+ struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
+ struct usbhs_omap_platform_data *pdata = omap->pdata;
+ int i, r;
+
+ dev_dbg(dev, "usbhs_runtime_resume\n");
+
+ omap_tll_enable(pdata);
+
+ if (!IS_ERR(omap->ehci_logic_fck))
+ clk_prepare_enable(omap->ehci_logic_fck);
+
+ for (i = 0; i < omap->nports; i++) {
+ switch (pdata->port_mode[i]) {
+ case OMAP_EHCI_PORT_MODE_HSIC:
+ if (!IS_ERR(omap->hsic60m_clk[i])) {
+ r = clk_prepare_enable(omap->hsic60m_clk[i]);
+ if (r) {
+ dev_err(dev,
+ "Can't enable port %d hsic60m clk:%d\n",
+ i, r);
+ }
+ }
+
+ if (!IS_ERR(omap->hsic480m_clk[i])) {
+ r = clk_prepare_enable(omap->hsic480m_clk[i]);
+ if (r) {
+ dev_err(dev,
+ "Can't enable port %d hsic480m clk:%d\n",
+ i, r);
+ }
+ }
+ /* Fall through as HSIC mode needs utmi_clk */
+
+ case OMAP_EHCI_PORT_MODE_TLL:
+ if (!IS_ERR(omap->utmi_clk[i])) {
+ r = clk_prepare_enable(omap->utmi_clk[i]);
+ if (r) {
+ dev_err(dev,
+ "Can't enable port %d clk : %d\n",
+ i, r);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int usbhs_runtime_suspend(struct device *dev)
+{
+ struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
+ struct usbhs_omap_platform_data *pdata = omap->pdata;
+ int i;
+
+ dev_dbg(dev, "usbhs_runtime_suspend\n");
+
+ for (i = 0; i < omap->nports; i++) {
+ switch (pdata->port_mode[i]) {
+ case OMAP_EHCI_PORT_MODE_HSIC:
+ if (!IS_ERR(omap->hsic60m_clk[i]))
+ clk_disable_unprepare(omap->hsic60m_clk[i]);
+
+ if (!IS_ERR(omap->hsic480m_clk[i]))
+ clk_disable_unprepare(omap->hsic480m_clk[i]);
+ /* Fall through as utmi_clks were used in HSIC mode */
+
+ case OMAP_EHCI_PORT_MODE_TLL:
+ if (!IS_ERR(omap->utmi_clk[i]))
+ clk_disable_unprepare(omap->utmi_clk[i]);
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (!IS_ERR(omap->ehci_logic_fck))
+ clk_disable_unprepare(omap->ehci_logic_fck);
+
+ omap_tll_disable(pdata);
+
+ return 0;
+}
+
+static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap,
+ unsigned reg)
+{
+ struct usbhs_omap_platform_data *pdata = omap->pdata;
+ int i;
+
+ for (i = 0; i < omap->nports; i++) {
+ switch (pdata->port_mode[i]) {
+ case OMAP_USBHS_PORT_MODE_UNUSED:
+ reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i);
+ break;
+ case OMAP_EHCI_PORT_MODE_PHY:
+ if (pdata->single_ulpi_bypass)
+ break;
+
+ if (i == 0)
+ reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
+ else
+ reg &= ~(OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
+ << (i-1));
+ break;
+ default:
+ if (pdata->single_ulpi_bypass)
+ break;
+
+ if (i == 0)
+ reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
+ else
+ reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
+ << (i-1);
+ break;
+ }
+ }
+
+ if (pdata->single_ulpi_bypass) {
+ /* bypass ULPI only if none of the ports use PHY mode */
+ reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
+
+ for (i = 0; i < omap->nports; i++) {
+ if (is_ehci_phy_mode(pdata->port_mode[i])) {
+ reg &= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
+ break;
+ }
+ }
+ }
+
+ return reg;
+}
+
+static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap,
+ unsigned reg)
+{
+ struct usbhs_omap_platform_data *pdata = omap->pdata;
+ int i;
+
+ for (i = 0; i < omap->nports; i++) {
+ /* Clear port mode fields for PHY mode */
+ reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i);
+
+ if (is_ehci_tll_mode(pdata->port_mode[i]) ||
+ (is_ohci_port(pdata->port_mode[i])))
+ reg |= OMAP4_P1_MODE_TLL << 2 * i;
+ else if (is_ehci_hsic_mode(pdata->port_mode[i]))
+ reg |= OMAP4_P1_MODE_HSIC << 2 * i;
+ }
+
+ return reg;
+}
+
+static void omap_usbhs_init(struct device *dev)
+{
+ struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
+ unsigned reg;
+
+ dev_dbg(dev, "starting TI HSUSB Controller\n");
+
+ pm_runtime_get_sync(dev);
+
+ reg = usbhs_read(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 |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK;
+ reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
+
+ switch (omap->usbhs_rev) {
+ case OMAP_USBHS_REV1:
+ reg = omap_usbhs_rev1_hostconfig(omap, reg);
+ break;
+
+ case OMAP_USBHS_REV2:
+ reg = omap_usbhs_rev2_hostconfig(omap, reg);
+ break;
+
+ default: /* newer revisions */
+ reg = omap_usbhs_rev2_hostconfig(omap, reg);
+ break;
+ }
+
+ usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
+ dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
+
+ pm_runtime_put_sync(dev);
+}
+
+static int usbhs_omap_get_dt_pdata(struct device *dev,
+ struct usbhs_omap_platform_data *pdata)
+{
+ int ret, i;
+ struct device_node *node = dev->of_node;
+
+ ret = of_property_read_u32(node, "num-ports", &pdata->nports);
+ if (ret)
+ pdata->nports = 0;
+
+ if (pdata->nports > OMAP3_HS_USB_PORTS) {
+ dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n",
+ pdata->nports, OMAP3_HS_USB_PORTS);
+ return -ENODEV;
+ }
+
+ /* get port modes */
+ for (i = 0; i < OMAP3_HS_USB_PORTS; i++) {
+ char prop[11];
+ const char *mode;
+
+ pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED;
+
+ snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
+ ret = of_property_read_string(node, prop, &mode);
+ if (ret < 0)
+ continue;
+
+ ret = omap_usbhs_get_dt_port_mode(mode);
+ if (ret < 0) {
+ dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
+ i, mode);
+ return -ENODEV;
+ }
+
+ dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret);
+ pdata->port_mode[i] = ret;
+ }
+
+ /* get flags */
+ pdata->single_ulpi_bypass = of_property_read_bool(node,
+ "single-ulpi-bypass");
+
+ return 0;
+}
+
+static const struct of_device_id usbhs_child_match_table[] = {
+ { .compatible = "ti,omap-ehci", },
+ { .compatible = "ti,omap-ohci", },
+ { }
+};
+
+/**
+ * usbhs_omap_probe - initialize TI-based HCDs
+ *
+ * Allocates basic resources for this USB host controller.
+ */
+static int usbhs_omap_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
+ struct usbhs_hcd_omap *omap;
+ struct resource *res;
+ int ret = 0;
+ int i;
+ bool need_logic_fck;
+
+ if (dev->of_node) {
+ /* For DT boot we populate platform data from OF node */
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ ret = usbhs_omap_get_dt_pdata(dev, pdata);
+ if (ret)
+ return ret;
+
+ dev->platform_data = pdata;
+ }
+
+ if (!pdata) {
+ dev_err(dev, "Missing platform data\n");
+ return -ENODEV;
+ }
+
+ if (pdata->nports > OMAP3_HS_USB_PORTS) {
+ dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n",
+ pdata->nports, OMAP3_HS_USB_PORTS);
+ return -ENODEV;
+ }
+
+ omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
+ if (!omap) {
+ dev_err(dev, "Memory allocation failed\n");
+ return -ENOMEM;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ omap->uhh_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(omap->uhh_base))
+ return PTR_ERR(omap->uhh_base);
+
+ omap->pdata = pdata;
+
+ /* Initialize the TLL subsystem */
+ omap_tll_init(pdata);
+
+ pm_runtime_enable(dev);
+
+ platform_set_drvdata(pdev, omap);
+ pm_runtime_get_sync(dev);
+
+ omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
+
+ /* we need to call runtime suspend before we update omap->nports
+ * to prevent unbalanced clk_disable()
+ */
+ pm_runtime_put_sync(dev);
+
+ /*
+ * If platform data contains nports then use that
+ * else make out number of ports from USBHS revision
+ */
+ if (pdata->nports) {
+ omap->nports = pdata->nports;
+ } else {
+ switch (omap->usbhs_rev) {
+ case OMAP_USBHS_REV1:
+ omap->nports = 3;
+ break;
+ case OMAP_USBHS_REV2:
+ omap->nports = 2;
+ break;
+ default:
+ omap->nports = OMAP3_HS_USB_PORTS;
+ dev_dbg(dev,
+ "USB HOST Rev:0x%d not recognized, assuming %d ports\n",
+ omap->usbhs_rev, omap->nports);
+ break;
+ }
+ pdata->nports = omap->nports;
+ }
+
+ i = sizeof(struct clk *) * omap->nports;
+ omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL);
+ omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
+ omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
+
+ if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) {
+ dev_err(dev, "Memory allocation failed\n");
+ ret = -ENOMEM;
+ goto err_mem;
+ }
+
+ /* Set all clocks as invalid to begin with */
+ omap->ehci_logic_fck = ERR_PTR(-ENODEV);
+ omap->init_60m_fclk = ERR_PTR(-ENODEV);
+ omap->utmi_p1_gfclk = ERR_PTR(-ENODEV);
+ omap->utmi_p2_gfclk = ERR_PTR(-ENODEV);
+ omap->xclk60mhsp1_ck = ERR_PTR(-ENODEV);
+ omap->xclk60mhsp2_ck = ERR_PTR(-ENODEV);
+
+ for (i = 0; i < omap->nports; i++) {
+ omap->utmi_clk[i] = ERR_PTR(-ENODEV);
+ omap->hsic480m_clk[i] = ERR_PTR(-ENODEV);
+ omap->hsic60m_clk[i] = ERR_PTR(-ENODEV);
+ }
+
+ /* for OMAP3 i.e. USBHS REV1 */
+ if (omap->usbhs_rev == OMAP_USBHS_REV1) {
+ need_logic_fck = false;
+ for (i = 0; i < omap->nports; i++) {
+ if (is_ehci_phy_mode(pdata->port_mode[i]) ||
+ is_ehci_tll_mode(pdata->port_mode[i]) ||
+ is_ehci_hsic_mode(pdata->port_mode[i]))
+
+ need_logic_fck |= true;
+ }
+
+ if (need_logic_fck) {
+ omap->ehci_logic_fck = devm_clk_get(dev,
+ "usbhost_120m_fck");
+ if (IS_ERR(omap->ehci_logic_fck)) {
+ ret = PTR_ERR(omap->ehci_logic_fck);
+ dev_err(dev, "usbhost_120m_fck failed:%d\n",
+ ret);
+ goto err_mem;
+ }
+ }
+ goto initialize;
+ }
+
+ /* for OMAP4+ i.e. USBHS REV2+ */
+ omap->utmi_p1_gfclk = devm_clk_get(dev, "utmi_p1_gfclk");
+ if (IS_ERR(omap->utmi_p1_gfclk)) {
+ ret = PTR_ERR(omap->utmi_p1_gfclk);
+ dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
+ goto err_mem;
+ }
+
+ omap->utmi_p2_gfclk = devm_clk_get(dev, "utmi_p2_gfclk");
+ if (IS_ERR(omap->utmi_p2_gfclk)) {
+ ret = PTR_ERR(omap->utmi_p2_gfclk);
+ dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
+ goto err_mem;
+ }
+
+ omap->xclk60mhsp1_ck = devm_clk_get(dev, "refclk_60m_ext_p1");
+ if (IS_ERR(omap->xclk60mhsp1_ck)) {
+ ret = PTR_ERR(omap->xclk60mhsp1_ck);
+ dev_err(dev, "refclk_60m_ext_p1 failed error:%d\n", ret);
+ goto err_mem;
+ }
+
+ omap->xclk60mhsp2_ck = devm_clk_get(dev, "refclk_60m_ext_p2");
+ if (IS_ERR(omap->xclk60mhsp2_ck)) {
+ ret = PTR_ERR(omap->xclk60mhsp2_ck);
+ dev_err(dev, "refclk_60m_ext_p2 failed error:%d\n", ret);
+ goto err_mem;
+ }
+
+ omap->init_60m_fclk = devm_clk_get(dev, "refclk_60m_int");
+ if (IS_ERR(omap->init_60m_fclk)) {
+ ret = PTR_ERR(omap->init_60m_fclk);
+ dev_err(dev, "refclk_60m_int failed error:%d\n", ret);
+ goto err_mem;
+ }
+
+ for (i = 0; i < omap->nports; i++) {
+ char clkname[30];
+
+ /* clock names are indexed from 1*/
+ snprintf(clkname, sizeof(clkname),
+ "usb_host_hs_utmi_p%d_clk", i + 1);
+
+ /* If a clock is not found we won't bail out as not all
+ * platforms have all clocks and we can function without
+ * them
+ */
+ omap->utmi_clk[i] = devm_clk_get(dev, clkname);
+ if (IS_ERR(omap->utmi_clk[i])) {
+ ret = PTR_ERR(omap->utmi_clk[i]);
+ dev_err(dev, "Failed to get clock : %s : %d\n",
+ clkname, ret);
+ goto err_mem;
+ }
+
+ snprintf(clkname, sizeof(clkname),
+ "usb_host_hs_hsic480m_p%d_clk", i + 1);
+ omap->hsic480m_clk[i] = devm_clk_get(dev, clkname);
+ if (IS_ERR(omap->hsic480m_clk[i])) {
+ ret = PTR_ERR(omap->hsic480m_clk[i]);
+ dev_err(dev, "Failed to get clock : %s : %d\n",
+ clkname, ret);
+ goto err_mem;
+ }
+
+ snprintf(clkname, sizeof(clkname),
+ "usb_host_hs_hsic60m_p%d_clk", i + 1);
+ omap->hsic60m_clk[i] = devm_clk_get(dev, clkname);
+ if (IS_ERR(omap->hsic60m_clk[i])) {
+ ret = PTR_ERR(omap->hsic60m_clk[i]);
+ dev_err(dev, "Failed to get clock : %s : %d\n",
+ clkname, ret);
+ goto err_mem;
+ }
+ }
+
+ if (is_ehci_phy_mode(pdata->port_mode[0])) {
+ ret = clk_set_parent(omap->utmi_p1_gfclk,
+ omap->xclk60mhsp1_ck);
+ if (ret != 0) {
+ dev_err(dev, "xclk60mhsp1_ck set parent failed: %d\n",
+ ret);
+ goto err_mem;
+ }
+ } else if (is_ehci_tll_mode(pdata->port_mode[0])) {
+ ret = clk_set_parent(omap->utmi_p1_gfclk,
+ omap->init_60m_fclk);
+ if (ret != 0) {
+ dev_err(dev, "P0 init_60m_fclk set parent failed: %d\n",
+ ret);
+ goto err_mem;
+ }
+ }
+
+ if (is_ehci_phy_mode(pdata->port_mode[1])) {
+ ret = clk_set_parent(omap->utmi_p2_gfclk,
+ omap->xclk60mhsp2_ck);
+ if (ret != 0) {
+ dev_err(dev, "xclk60mhsp2_ck set parent failed: %d\n",
+ ret);
+ goto err_mem;
+ }
+ } else if (is_ehci_tll_mode(pdata->port_mode[1])) {
+ ret = clk_set_parent(omap->utmi_p2_gfclk,
+ omap->init_60m_fclk);
+ if (ret != 0) {
+ dev_err(dev, "P1 init_60m_fclk set parent failed: %d\n",
+ ret);
+ goto err_mem;
+ }
+ }
+
+initialize:
+ omap_usbhs_init(dev);
+
+ if (dev->of_node) {
+ ret = of_platform_populate(dev->of_node,
+ usbhs_child_match_table, NULL, dev);
+
+ if (ret) {
+ dev_err(dev, "Failed to create DT children: %d\n", ret);
+ goto err_mem;
+ }
+
+ } else {
+ ret = omap_usbhs_alloc_children(pdev);
+ if (ret) {
+ dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
+ ret);
+ goto err_mem;
+ }
+ }
+
+ return 0;
+
+err_mem:
+ pm_runtime_disable(dev);
+
+ return ret;
+}
+
+static int usbhs_omap_remove_child(struct device *dev, void *data)
+{
+ dev_info(dev, "unregistering\n");
+ platform_device_unregister(to_platform_device(dev));
+ return 0;
+}
+
+/**
+ * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
+ * @pdev: USB Host Controller being removed
+ *
+ * Reverses the effect of usbhs_omap_probe().
+ */
+static int usbhs_omap_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+
+ /* remove children */
+ device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child);
+ return 0;
+}
+
+static const struct dev_pm_ops usbhsomap_dev_pm_ops = {
+ .runtime_suspend = usbhs_runtime_suspend,
+ .runtime_resume = usbhs_runtime_resume,
+};
+
+static const struct of_device_id usbhs_omap_dt_ids[] = {
+ { .compatible = "ti,usbhs-host" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids);
+
+
+static struct platform_driver usbhs_omap_driver = {
+ .driver = {
+ .name = (char *)usbhs_driver_name,
+ .owner = THIS_MODULE,
+ .pm = &usbhsomap_dev_pm_ops,
+ .of_match_table = usbhs_omap_dt_ids,
+ },
+ .remove = usbhs_omap_remove,
+};
+
+MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
+MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
+MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");
+
+static int __init omap_usbhs_drvinit(void)
+{
+ return platform_driver_probe(&usbhs_omap_driver, usbhs_omap_probe);
+}
+
+/*
+ * init before ehci and ohci drivers;
+ * The usbhs core driver should be initialized much before
+ * the omap ehci and ohci probe functions are called.
+ * This usbhs core driver should be initialized after
+ * usb tll driver
+ */
+fs_initcall_sync(omap_usbhs_drvinit);
+
+static void __exit omap_usbhs_drvexit(void)
+{
+ platform_driver_unregister(&usbhs_omap_driver);
+}
+module_exit(omap_usbhs_drvexit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:43:16 +0000