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linux-next/drivers/mfd/omap-usb-host.c
Keshava Munegowda 7e6502d577 mfd: Add omap-usbhs runtime PM support 
The usbhs core driver does not enable/disable the interface and
functional clocks; These clocks are handled by hwmod and runtime pm,
hence insted of the clock enable/disable, the runtime pm APIS are
used. however,the port clocks and tll clocks are handled
by the usbhs core.

Signed-off-by: Keshava Munegowda <keshava_mgowda@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-05-26 19:45:52 +02:00

959 lines
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/**
* omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI
*
* Copyright (C) 2011 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/types.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/spinlock.h>
#include <linux/gpio.h>
#include <plat/usb.h>
#include <linux/pm_runtime.h>
#define USBHS_DRIVER_NAME "usbhs-omap"
#define OMAP_EHCI_DEVICE "ehci-omap"
#define OMAP_OHCI_DEVICE "ohci-omap3"
/* OMAP USBHOST Register addresses */
/* 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_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)
/* 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_REV2_TLL_CHANNEL_COUNT 2
#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 {
struct clk *xclk60mhsp1_ck;
struct clk *xclk60mhsp2_ck;
struct clk *utmi_p1_fck;
struct clk *usbhost_p1_fck;
struct clk *usbtll_p1_fck;
struct clk *utmi_p2_fck;
struct clk *usbhost_p2_fck;
struct clk *usbtll_p2_fck;
struct clk *init_60m_fclk;
void __iomem *uhh_base;
void __iomem *tll_base;
struct usbhs_omap_platform_data platdata;
u32 usbhs_rev;
spinlock_t lock;
int count;
};
/*-------------------------------------------------------------------------*/
const char usbhs_driver_name[] = USBHS_DRIVER_NAME;
static u64 usbhs_dmamask = ~(u32)0;
/*-------------------------------------------------------------------------*/
static inline void usbhs_write(void __iomem *base, u32 reg, u32 val)
{
__raw_writel(val, base + reg);
}
static inline u32 usbhs_read(void __iomem *base, u32 reg)
{
return __raw_readl(base + reg);
}
static inline void usbhs_writeb(void __iomem *base, u8 reg, u8 val)
{
__raw_writeb(val, base + reg);
}
static inline u8 usbhs_readb(void __iomem *base, u8 reg)
{
return __raw_readb(base + reg);
}
/*-------------------------------------------------------------------------*/
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;
child->dev.coherent_dma_mask = 0xffffffff;
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_hcd_omap *omap;
struct ehci_hcd_omap_platform_data *ehci_data;
struct ohci_hcd_omap_platform_data *ohci_data;
struct platform_device *ehci;
struct platform_device *ohci;
struct resource *res;
struct resource resources[2];
int ret;
omap = platform_get_drvdata(pdev);
ehci_data = omap->platdata.ehci_data;
ohci_data = omap->platdata.ohci_data;
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, ehci_data,
sizeof(*ehci_data), 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, ohci_data,
sizeof(*ohci_data), 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;
}
/**
* usbhs_omap_probe - initialize TI-based HCDs
*
* Allocates basic resources for this USB host controller.
*/
static int __devinit usbhs_omap_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct usbhs_omap_platform_data *pdata = dev->platform_data;
struct usbhs_hcd_omap *omap;
struct resource *res;
int ret = 0;
int i;
if (!pdata) {
dev_err(dev, "Missing platform data\n");
ret = -ENOMEM;
goto end_probe;
}
omap = kzalloc(sizeof(*omap), GFP_KERNEL);
if (!omap) {
dev_err(dev, "Memory allocation failed\n");
ret = -ENOMEM;
goto end_probe;
}
spin_lock_init(&omap->lock);
for (i = 0; i < OMAP3_HS_USB_PORTS; i++)
omap->platdata.port_mode[i] = pdata->port_mode[i];
omap->platdata.ehci_data = pdata->ehci_data;
omap->platdata.ohci_data = pdata->ohci_data;
pm_runtime_enable(&pdev->dev);
omap->utmi_p1_fck = clk_get(dev, "utmi_p1_gfclk");
if (IS_ERR(omap->utmi_p1_fck)) {
ret = PTR_ERR(omap->utmi_p1_fck);
dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
goto err_end;
}
omap->xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck");
if (IS_ERR(omap->xclk60mhsp1_ck)) {
ret = PTR_ERR(omap->xclk60mhsp1_ck);
dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret);
goto err_utmi_p1_fck;
}
omap->utmi_p2_fck = clk_get(dev, "utmi_p2_gfclk");
if (IS_ERR(omap->utmi_p2_fck)) {
ret = PTR_ERR(omap->utmi_p2_fck);
dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
goto err_xclk60mhsp1_ck;
}
omap->xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck");
if (IS_ERR(omap->xclk60mhsp2_ck)) {
ret = PTR_ERR(omap->xclk60mhsp2_ck);
dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret);
goto err_utmi_p2_fck;
}
omap->usbhost_p1_fck = clk_get(dev, "usb_host_hs_utmi_p1_clk");
if (IS_ERR(omap->usbhost_p1_fck)) {
ret = PTR_ERR(omap->usbhost_p1_fck);
dev_err(dev, "usbhost_p1_fck failed error:%d\n", ret);
goto err_xclk60mhsp2_ck;
}
omap->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk");
if (IS_ERR(omap->usbtll_p1_fck)) {
ret = PTR_ERR(omap->usbtll_p1_fck);
dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret);
goto err_usbhost_p1_fck;
}
omap->usbhost_p2_fck = clk_get(dev, "usb_host_hs_utmi_p2_clk");
if (IS_ERR(omap->usbhost_p2_fck)) {
ret = PTR_ERR(omap->usbhost_p2_fck);
dev_err(dev, "usbhost_p2_fck failed error:%d\n", ret);
goto err_usbtll_p1_fck;
}
omap->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk");
if (IS_ERR(omap->usbtll_p2_fck)) {
ret = PTR_ERR(omap->usbtll_p2_fck);
dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret);
goto err_usbhost_p2_fck;
}
omap->init_60m_fclk = clk_get(dev, "init_60m_fclk");
if (IS_ERR(omap->init_60m_fclk)) {
ret = PTR_ERR(omap->init_60m_fclk);
dev_err(dev, "init_60m_fclk failed error:%d\n", ret);
goto err_usbtll_p2_fck;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "uhh");
if (!res) {
dev_err(dev, "UHH EHCI get resource failed\n");
ret = -ENODEV;
goto err_init_60m_fclk;
}
omap->uhh_base = ioremap(res->start, resource_size(res));
if (!omap->uhh_base) {
dev_err(dev, "UHH ioremap failed\n");
ret = -ENOMEM;
goto err_init_60m_fclk;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tll");
if (!res) {
dev_err(dev, "UHH EHCI get resource failed\n");
ret = -ENODEV;
goto err_tll;
}
omap->tll_base = ioremap(res->start, resource_size(res));
if (!omap->tll_base) {
dev_err(dev, "TLL ioremap failed\n");
ret = -ENOMEM;
goto err_tll;
}
platform_set_drvdata(pdev, omap);
ret = omap_usbhs_alloc_children(pdev);
if (ret) {
dev_err(dev, "omap_usbhs_alloc_children failed\n");
goto err_alloc;
}
goto end_probe;
err_alloc:
iounmap(omap->tll_base);
err_tll:
iounmap(omap->uhh_base);
err_init_60m_fclk:
clk_put(omap->init_60m_fclk);
err_usbtll_p2_fck:
clk_put(omap->usbtll_p2_fck);
err_usbhost_p2_fck:
clk_put(omap->usbhost_p2_fck);
err_usbtll_p1_fck:
clk_put(omap->usbtll_p1_fck);
err_usbhost_p1_fck:
clk_put(omap->usbhost_p1_fck);
err_xclk60mhsp2_ck:
clk_put(omap->xclk60mhsp2_ck);
err_utmi_p2_fck:
clk_put(omap->utmi_p2_fck);
err_xclk60mhsp1_ck:
clk_put(omap->xclk60mhsp1_ck);
err_utmi_p1_fck:
clk_put(omap->utmi_p1_fck);
err_end:
pm_runtime_disable(&pdev->dev);
kfree(omap);
end_probe:
return ret;
}
/**
* usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
* @pdev: USB Host Controller being removed
*
* Reverses the effect of usbhs_omap_probe().
*/
static int __devexit usbhs_omap_remove(struct platform_device *pdev)
{
struct usbhs_hcd_omap *omap = platform_get_drvdata(pdev);
if (omap->count != 0) {
dev_err(&pdev->dev,
"Either EHCI or OHCI is still using usbhs core\n");
return -EBUSY;
}
iounmap(omap->tll_base);
iounmap(omap->uhh_base);
clk_put(omap->init_60m_fclk);
clk_put(omap->usbtll_p2_fck);
clk_put(omap->usbhost_p2_fck);
clk_put(omap->usbtll_p1_fck);
clk_put(omap->usbhost_p1_fck);
clk_put(omap->xclk60mhsp2_ck);
clk_put(omap->utmi_p2_fck);
clk_put(omap->xclk60mhsp1_ck);
clk_put(omap->utmi_p1_fck);
pm_runtime_disable(&pdev->dev);
kfree(omap);
return 0;
}
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_warning("Invalid port mode, using default\n");
return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
}
}
static void usbhs_omap_tll_init(struct device *dev, u8 tll_channel_count)
{
struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
struct usbhs_omap_platform_data *pdata = dev->platform_data;
unsigned reg;
int i;
/* Program Common TLL register */
reg = usbhs_read(omap->tll_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;
usbhs_write(omap->tll_base, OMAP_TLL_SHARED_CONF, reg);
/* Enable channels now */
for (i = 0; i < tll_channel_count; i++) {
reg = usbhs_read(omap->tll_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);
reg |= (1 << (i + 1));
} else
continue;
reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
usbhs_write(omap->tll_base,
OMAP_TLL_CHANNEL_CONF(i), reg);
usbhs_writeb(omap->tll_base,
OMAP_TLL_ULPI_SCRATCH_REGISTER(i), 0xbe);
}
}
static int usbhs_enable(struct device *dev)
{
struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
struct usbhs_omap_platform_data *pdata = &omap->platdata;
unsigned long flags = 0;
int ret = 0;
unsigned reg;
dev_dbg(dev, "starting TI HSUSB Controller\n");
if (!pdata) {
dev_dbg(dev, "missing platform_data\n");
return -ENODEV;
}
spin_lock_irqsave(&omap->lock, flags);
if (omap->count > 0)
goto end_count;
pm_runtime_get_sync(dev);
if (pdata->ehci_data->phy_reset) {
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[0])) {
gpio_request(pdata->ehci_data->reset_gpio_port[0],
"USB1 PHY reset");
gpio_direction_output
(pdata->ehci_data->reset_gpio_port[0], 0);
}
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1])) {
gpio_request(pdata->ehci_data->reset_gpio_port[1],
"USB2 PHY reset");
gpio_direction_output
(pdata->ehci_data->reset_gpio_port[1], 0);
}
/* Hold the PHY in RESET for enough time till DIR is high */
udelay(10);
}
omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
dev_dbg(dev, "OMAP UHH_REVISION 0x%x\n", omap->usbhs_rev);
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;
if (is_omap_usbhs_rev1(omap)) {
if (pdata->port_mode[0] == OMAP_USBHS_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS;
if (pdata->port_mode[1] == OMAP_USBHS_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS;
if (pdata->port_mode[2] == OMAP_USBHS_PORT_MODE_UNUSED)
reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS;
/* Bypass the TLL module for PHY mode operation */
if (cpu_is_omap3430() && (omap_rev() <= OMAP3430_REV_ES2_1)) {
dev_dbg(dev, "OMAP3 ES version <= ES2.1\n");
if (is_ehci_phy_mode(pdata->port_mode[0]) ||
is_ehci_phy_mode(pdata->port_mode[1]) ||
is_ehci_phy_mode(pdata->port_mode[2]))
reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
else
reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
} else {
dev_dbg(dev, "OMAP3 ES version > ES2.1\n");
if (is_ehci_phy_mode(pdata->port_mode[0]))
reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
else
reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
if (is_ehci_phy_mode(pdata->port_mode[1]))
reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
else
reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
if (is_ehci_phy_mode(pdata->port_mode[2]))
reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
else
reg |= OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
}
} else if (is_omap_usbhs_rev2(omap)) {
/* Clear port mode fields for PHY mode*/
reg &= ~OMAP4_P1_MODE_CLEAR;
reg &= ~OMAP4_P2_MODE_CLEAR;
if (is_ehci_phy_mode(pdata->port_mode[0])) {
ret = clk_set_parent(omap->utmi_p1_fck,
omap->xclk60mhsp1_ck);
if (ret != 0) {
dev_err(dev, "xclk60mhsp1_ck set parent"
"failed error:%d\n", ret);
goto err_tll;
}
} else if (is_ehci_tll_mode(pdata->port_mode[0])) {
ret = clk_set_parent(omap->utmi_p1_fck,
omap->init_60m_fclk);
if (ret != 0) {
dev_err(dev, "init_60m_fclk set parent"
"failed error:%d\n", ret);
goto err_tll;
}
clk_enable(omap->usbhost_p1_fck);
clk_enable(omap->usbtll_p1_fck);
}
if (is_ehci_phy_mode(pdata->port_mode[1])) {
ret = clk_set_parent(omap->utmi_p2_fck,
omap->xclk60mhsp2_ck);
if (ret != 0) {
dev_err(dev, "xclk60mhsp1_ck set parent"
"failed error:%d\n", ret);
goto err_tll;
}
} else if (is_ehci_tll_mode(pdata->port_mode[1])) {
ret = clk_set_parent(omap->utmi_p2_fck,
omap->init_60m_fclk);
if (ret != 0) {
dev_err(dev, "init_60m_fclk set parent"
"failed error:%d\n", ret);
goto err_tll;
}
clk_enable(omap->usbhost_p2_fck);
clk_enable(omap->usbtll_p2_fck);
}
clk_enable(omap->utmi_p1_fck);
clk_enable(omap->utmi_p2_fck);
if (is_ehci_tll_mode(pdata->port_mode[0]) ||
(is_ohci_port(pdata->port_mode[0])))
reg |= OMAP4_P1_MODE_TLL;
else if (is_ehci_hsic_mode(pdata->port_mode[0]))
reg |= OMAP4_P1_MODE_HSIC;
if (is_ehci_tll_mode(pdata->port_mode[1]) ||
(is_ohci_port(pdata->port_mode[1])))
reg |= OMAP4_P2_MODE_TLL;
else if (is_ehci_hsic_mode(pdata->port_mode[1]))
reg |= OMAP4_P2_MODE_HSIC;
}
usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
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]))) {
/* Enable UTMI mode for required TLL channels */
if (is_omap_usbhs_rev2(omap))
usbhs_omap_tll_init(dev, OMAP_REV2_TLL_CHANNEL_COUNT);
else
usbhs_omap_tll_init(dev, OMAP_TLL_CHANNEL_COUNT);
}
if (pdata->ehci_data->phy_reset) {
/* Hold the PHY in RESET for enough time till
* PHY is settled and ready
*/
udelay(10);
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[0]))
gpio_set_value
(pdata->ehci_data->reset_gpio_port[0], 1);
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1]))
gpio_set_value
(pdata->ehci_data->reset_gpio_port[1], 1);
}
end_count:
omap->count++;
spin_unlock_irqrestore(&omap->lock, flags);
return 0;
err_tll:
pm_runtime_put_sync(dev);
spin_unlock_irqrestore(&omap->lock, flags);
if (pdata->ehci_data->phy_reset) {
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[0]))
gpio_free(pdata->ehci_data->reset_gpio_port[0]);
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1]))
gpio_free(pdata->ehci_data->reset_gpio_port[1]);
}
return ret;
}
static void usbhs_disable(struct device *dev)
{
struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
struct usbhs_omap_platform_data *pdata = &omap->platdata;
unsigned long flags = 0;
unsigned long timeout;
dev_dbg(dev, "stopping TI HSUSB Controller\n");
spin_lock_irqsave(&omap->lock, flags);
if (omap->count == 0)
goto end_disble;
omap->count--;
if (omap->count != 0)
goto end_disble;
/* Reset OMAP modules for insmod/rmmod to work */
usbhs_write(omap->uhh_base, OMAP_UHH_SYSCONFIG,
is_omap_usbhs_rev2(omap) ?
OMAP4_UHH_SYSCONFIG_SOFTRESET :
OMAP_UHH_SYSCONFIG_SOFTRESET);
timeout = jiffies + msecs_to_jiffies(100);
while (!(usbhs_read(omap->uhh_base, OMAP_UHH_SYSSTATUS)
& (1 << 0))) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(dev, "operation timed out\n");
}
while (!(usbhs_read(omap->uhh_base, OMAP_UHH_SYSSTATUS)
& (1 << 1))) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(dev, "operation timed out\n");
}
while (!(usbhs_read(omap->uhh_base, OMAP_UHH_SYSSTATUS)
& (1 << 2))) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(dev, "operation timed out\n");
}
usbhs_write(omap->tll_base, OMAP_USBTLL_SYSCONFIG, (1 << 1));
while (!(usbhs_read(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
& (1 << 0))) {
cpu_relax();
if (time_after(jiffies, timeout))
dev_dbg(dev, "operation timed out\n");
}
if (is_omap_usbhs_rev2(omap)) {
if (is_ehci_tll_mode(pdata->port_mode[0]))
clk_enable(omap->usbtll_p1_fck);
if (is_ehci_tll_mode(pdata->port_mode[1]))
clk_enable(omap->usbtll_p2_fck);
clk_disable(omap->utmi_p2_fck);
clk_disable(omap->utmi_p1_fck);
}
pm_runtime_put_sync(dev);
/* The gpio_free migh sleep; so unlock the spinlock */
spin_unlock_irqrestore(&omap->lock, flags);
if (pdata->ehci_data->phy_reset) {
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[0]))
gpio_free(pdata->ehci_data->reset_gpio_port[0]);
if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1]))
gpio_free(pdata->ehci_data->reset_gpio_port[1]);
}
return;
end_disble:
spin_unlock_irqrestore(&omap->lock, flags);
}
int omap_usbhs_enable(struct device *dev)
{
return usbhs_enable(dev->parent);
}
EXPORT_SYMBOL_GPL(omap_usbhs_enable);
void omap_usbhs_disable(struct device *dev)
{
usbhs_disable(dev->parent);
}
EXPORT_SYMBOL_GPL(omap_usbhs_disable);
static struct platform_driver usbhs_omap_driver = {
.driver = {
.name = (char *)usbhs_driver_name,
.owner = THIS_MODULE,
},
.remove = __exit_p(usbhs_omap_remove),
};
MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@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.
*/
fs_initcall(omap_usbhs_drvinit);
static void __exit omap_usbhs_drvexit(void)
{
platform_driver_unregister(&usbhs_omap_driver);
}
module_exit(omap_usbhs_drvexit);
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