mfd: omap-usb-tll: HOST TLL platform driver
The platform driver for the TLL component of the OMAP USB host controller is implemented. Depending on the TLL hardware revision , the TLL channels are configured. The USB HS core driver uses this driver through exported APIs from the TLL platform driver. usb_tll_enable and usb_tll_disble are the exported APIs of the USB TLL platform driver. Signed-off-by: Keshava Munegowda <keshava_mgowda@ti.com> Reviewed-by: Partha Basak <parthab@india.ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Keshava Munegowda
Samuel Ortiz
parent
99de1cc5a7
commit
16fa3dc75c
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@ -64,6 +64,10 @@ struct usbhs_omap_platform_data {
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struct ehci_hcd_omap_platform_data *ehci_data;
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struct ohci_hcd_omap_platform_data *ohci_data;
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};
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struct usbtll_omap_platform_data {
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enum usbhs_omap_port_mode port_mode[OMAP3_HS_USB_PORTS];
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};
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/*-------------------------------------------------------------------------*/
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struct omap_musb_board_data {
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@ -82,6 +86,8 @@ enum musb_interface {MUSB_INTERFACE_ULPI, MUSB_INTERFACE_UTMI};
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extern void usb_musb_init(struct omap_musb_board_data *board_data);
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extern void usbhs_init(const struct usbhs_omap_board_data *pdata);
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extern int omap_tll_enable(void);
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extern int omap_tll_disable(void);
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extern int omap4430_phy_power(struct device *dev, int ID, int on);
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extern int omap4430_phy_set_clk(struct device *dev, int on);
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@ -897,7 +897,7 @@ config MFD_WL1273_CORE
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audio codec.
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config MFD_OMAP_USB_HOST
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bool "Support OMAP USBHS core driver"
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bool "Support OMAP USBHS core and TLL driver"
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depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3
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default y
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help
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@ -120,7 +120,7 @@ obj-$(CONFIG_MFD_TPS6586X) += tps6586x.o
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obj-$(CONFIG_MFD_VX855) += vx855.o
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obj-$(CONFIG_MFD_WL1273_CORE) += wl1273-core.o
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obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o
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obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o
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obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o omap-usb-tll.o
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obj-$(CONFIG_MFD_PM8921_CORE) += pm8921-core.o
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obj-$(CONFIG_MFD_PM8XXX_IRQ) += pm8xxx-irq.o
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obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o
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@ -0,0 +1,471 @@
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/**
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* omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
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*
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* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
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* Author: Keshava Munegowda <keshava_mgowda@ti.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 of
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* the License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/err.h>
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#include <plat/usb.h>
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#include <linux/pm_runtime.h>
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#define USBTLL_DRIVER_NAME "usbhs_tll"
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/* TLL Register Set */
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#define OMAP_USBTLL_REVISION (0x00)
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#define OMAP_USBTLL_SYSCONFIG (0x10)
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#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
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#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
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#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
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#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
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#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
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#define OMAP_USBTLL_SYSSTATUS (0x14)
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#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
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#define OMAP_USBTLL_IRQSTATUS (0x18)
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#define OMAP_USBTLL_IRQENABLE (0x1C)
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#define OMAP_TLL_SHARED_CONF (0x30)
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#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
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#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
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#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
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#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
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#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
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#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
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#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
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#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
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#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
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#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
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#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
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#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
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#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
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#define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0
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#define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1
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#define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2
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#define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3
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#define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4
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#define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5
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#define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6
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#define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7
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#define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA
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#define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB
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#define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
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#define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
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#define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
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#define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
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#define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
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#define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
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#define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
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#define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
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#define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
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#define OMAP_REV2_TLL_CHANNEL_COUNT 2
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#define OMAP_TLL_CHANNEL_COUNT 3
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#define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0)
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#define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1)
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#define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2)
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/* Values of USBTLL_REVISION - Note: these are not given in the TRM */
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#define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
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#define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */
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#define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */
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#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
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struct usbtll_omap {
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struct clk *usbtll_p1_fck;
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struct clk *usbtll_p2_fck;
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struct usbtll_omap_platform_data platdata;
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/* secure the register updates */
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spinlock_t lock;
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};
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/*-------------------------------------------------------------------------*/
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const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
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struct platform_device *tll_pdev;
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/*-------------------------------------------------------------------------*/
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static inline void usbtll_write(void __iomem *base, u32 reg, u32 val)
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{
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__raw_writel(val, base + reg);
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}
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static inline u32 usbtll_read(void __iomem *base, u32 reg)
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{
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return __raw_readl(base + reg);
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}
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static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val)
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{
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__raw_writeb(val, base + reg);
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}
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static inline u8 usbtll_readb(void __iomem *base, u8 reg)
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{
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return __raw_readb(base + reg);
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}
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/*-------------------------------------------------------------------------*/
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static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
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{
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switch (pmode) {
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
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return true;
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default:
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return false;
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}
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}
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/*
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* convert the port-mode enum to a value we can use in the FSLSMODE
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* field of USBTLL_CHANNEL_CONF
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*/
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static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
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{
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switch (mode) {
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case OMAP_USBHS_PORT_MODE_UNUSED:
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
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return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
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return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM;
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case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
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return OMAP_TLL_FSLSMODE_3PIN_PHY;
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case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
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return OMAP_TLL_FSLSMODE_4PIN_PHY;
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
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return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0;
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
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return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM;
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case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
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return OMAP_TLL_FSLSMODE_3PIN_TLL;
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case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
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return OMAP_TLL_FSLSMODE_4PIN_TLL;
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
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return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0;
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
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return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM;
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default:
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pr_warn("Invalid port mode, using default\n");
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return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
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}
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}
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/**
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* usbtll_omap_probe - initialize TI-based HCDs
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*
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* Allocates basic resources for this USB host controller.
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*/
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static int __devinit usbtll_omap_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct usbtll_omap_platform_data *pdata = dev->platform_data;
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void __iomem *base;
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struct resource *res;
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struct usbtll_omap *tll;
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unsigned reg;
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unsigned long flags;
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int ret = 0;
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int i, ver, count;
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dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
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tll = kzalloc(sizeof(struct usbtll_omap), GFP_KERNEL);
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if (!tll) {
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dev_err(dev, "Memory allocation failed\n");
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ret = -ENOMEM;
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goto end;
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}
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spin_lock_init(&tll->lock);
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for (i = 0; i < OMAP3_HS_USB_PORTS; i++)
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tll->platdata.port_mode[i] = pdata->port_mode[i];
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tll->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk");
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if (IS_ERR(tll->usbtll_p1_fck)) {
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ret = PTR_ERR(tll->usbtll_p1_fck);
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dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret);
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goto err_tll;
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}
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tll->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk");
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if (IS_ERR(tll->usbtll_p2_fck)) {
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ret = PTR_ERR(tll->usbtll_p2_fck);
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dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret);
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goto err_usbtll_p1_fck;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(dev, "usb tll get resource failed\n");
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ret = -ENODEV;
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goto err_usbtll_p2_fck;
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}
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base = ioremap(res->start, resource_size(res));
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if (!base) {
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dev_err(dev, "TLL ioremap failed\n");
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ret = -ENOMEM;
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goto err_usbtll_p2_fck;
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}
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platform_set_drvdata(pdev, tll);
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pm_runtime_enable(dev);
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pm_runtime_get_sync(dev);
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spin_lock_irqsave(&tll->lock, flags);
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ver = usbtll_read(base, OMAP_USBTLL_REVISION);
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switch (ver) {
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case OMAP_USBTLL_REV1:
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case OMAP_USBTLL_REV2:
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count = OMAP_TLL_CHANNEL_COUNT;
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break;
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case OMAP_USBTLL_REV3:
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count = OMAP_REV2_TLL_CHANNEL_COUNT;
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break;
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default:
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dev_err(dev, "TLL version failed\n");
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ret = -ENODEV;
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goto err_ioremap;
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}
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if (is_ehci_tll_mode(pdata->port_mode[0]) ||
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is_ehci_tll_mode(pdata->port_mode[1]) ||
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is_ehci_tll_mode(pdata->port_mode[2]) ||
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is_ohci_port(pdata->port_mode[0]) ||
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is_ohci_port(pdata->port_mode[1]) ||
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is_ohci_port(pdata->port_mode[2])) {
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/* Program Common TLL register */
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reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
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reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
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| OMAP_TLL_SHARED_CONF_USB_DIVRATION);
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reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
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reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
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usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
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/* Enable channels now */
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for (i = 0; i < count; i++) {
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reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
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if (is_ohci_port(pdata->port_mode[i])) {
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reg |= ohci_omap3_fslsmode(pdata->port_mode[i])
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<< OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
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reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
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} else if (pdata->port_mode[i] ==
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OMAP_EHCI_PORT_MODE_TLL) {
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/*
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* Disable AutoIdle, BitStuffing
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* and use SDR Mode
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*/
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reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
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| OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
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| OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
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} else {
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continue;
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}
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reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
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usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg);
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usbtll_writeb(base,
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OMAP_TLL_ULPI_SCRATCH_REGISTER(i),
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0xbe);
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}
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}
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err_ioremap:
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spin_unlock_irqrestore(&tll->lock, flags);
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iounmap(base);
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pm_runtime_put_sync(dev);
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tll_pdev = pdev;
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if (!ret)
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goto end;
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pm_runtime_disable(dev);
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err_usbtll_p2_fck:
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clk_put(tll->usbtll_p2_fck);
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err_usbtll_p1_fck:
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clk_put(tll->usbtll_p1_fck);
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err_tll:
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kfree(tll);
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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);
|
||||
Loading…
Reference in New Issue