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path: root/drivers/mfd/omap-usb-tll.c
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Diffstat (limited to 'drivers/mfd/omap-usb-tll.c')
-rw-r--r--drivers/mfd/omap-usb-tll.c243
1 files changed, 134 insertions, 109 deletions
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index eb869153206d..0aef1a768880 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -54,10 +54,13 @@
#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
+#define OMAP_TLL_CHANNEL_CONF_DRVVBUS (1 << 16)
+#define OMAP_TLL_CHANNEL_CONF_CHRGVBUS (1 << 15)
#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_MODE_TRANSPARENT_UTMI (2 << 1)
#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
@@ -92,21 +95,25 @@
#define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
#define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */
#define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */
+#define OMAP_USBTLL_REV4 0x00000006 /* OMAP5 */
#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
+/* only PHY and UNUSED modes don't need TLL */
+#define omap_usb_mode_needs_tll(x) ((x) != OMAP_USBHS_PORT_MODE_UNUSED &&\
+ (x) != OMAP_EHCI_PORT_MODE_PHY)
+
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;
+ int nch; /* num. of channels */
+ struct usbhs_omap_platform_data *pdata;
+ struct clk **ch_clk;
};
/*-------------------------------------------------------------------------*/
-const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
-struct platform_device *tll_pdev;
+static const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
+static struct device *tll_dev;
+static DEFINE_SPINLOCK(tll_lock); /* serialize access to tll_dev */
/*-------------------------------------------------------------------------*/
@@ -203,84 +210,84 @@ static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
static int usbtll_omap_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct usbtll_omap_platform_data *pdata = dev->platform_data;
+ struct usbhs_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;
+ int i, ver;
+ bool needs_tll;
dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
- tll = kzalloc(sizeof(struct usbtll_omap), GFP_KERNEL);
+ tll = devm_kzalloc(dev, sizeof(struct usbtll_omap), GFP_KERNEL);
if (!tll) {
dev_err(dev, "Memory allocation failed\n");
- ret = -ENOMEM;
- goto end;
+ return -ENOMEM;
}
- 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;
+ if (!pdata) {
+ dev_err(dev, "Platform data missing\n");
+ return -ENODEV;
}
- 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;
- }
+ tll->pdata = pdata;
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));
+ base = devm_request_and_ioremap(dev, res);
if (!base) {
- dev_err(dev, "TLL ioremap failed\n");
- ret = -ENOMEM;
- goto err_usbtll_p2_fck;
+ ret = -EADDRNOTAVAIL;
+ dev_err(dev, "Resource request/ioremap failed:%d\n", ret);
+ return ret;
}
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;
+ case OMAP_USBTLL_REV4:
+ tll->nch = OMAP_TLL_CHANNEL_COUNT;
break;
+ case OMAP_USBTLL_REV2:
case OMAP_USBTLL_REV3:
- count = OMAP_REV2_TLL_CHANNEL_COUNT;
+ tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT;
break;
default:
- dev_err(dev, "TLL version failed\n");
- ret = -ENODEV;
- goto err_ioremap;
+ tll->nch = OMAP_TLL_CHANNEL_COUNT;
+ dev_dbg(dev,
+ "USB TLL Rev : 0x%x not recognized, assuming %d channels\n",
+ ver, tll->nch);
+ break;
}
- 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])) {
+ tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk * [tll->nch]),
+ GFP_KERNEL);
+ if (!tll->ch_clk) {
+ ret = -ENOMEM;
+ dev_err(dev, "Couldn't allocate memory for channel clocks\n");
+ goto err_clk_alloc;
+ }
+
+ for (i = 0; i < tll->nch; i++) {
+ char clkname[] = "usb_tll_hs_usb_chx_clk";
+
+ snprintf(clkname, sizeof(clkname),
+ "usb_tll_hs_usb_ch%d_clk", i);
+ tll->ch_clk[i] = clk_get(dev, clkname);
+
+ if (IS_ERR(tll->ch_clk[i]))
+ dev_dbg(dev, "can't get clock : %s\n", clkname);
+ }
+
+ needs_tll = false;
+ for (i = 0; i < tll->nch; i++)
+ needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]);
+
+ if (needs_tll) {
/* Program Common TLL register */
reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
@@ -292,7 +299,7 @@ static int usbtll_omap_probe(struct platform_device *pdev)
usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
/* Enable channels now */
- for (i = 0; i < count; i++) {
+ for (i = 0; i < tll->nch; i++) {
reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
if (is_ohci_port(pdata->port_mode[i])) {
@@ -308,6 +315,15 @@ static int usbtll_omap_probe(struct platform_device *pdev)
reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
| OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
| OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
+ } else if (pdata->port_mode[i] ==
+ OMAP_EHCI_PORT_MODE_HSIC) {
+ /*
+ * HSIC Mode requires UTMI port configurations
+ */
+ reg |= OMAP_TLL_CHANNEL_CONF_DRVVBUS
+ | OMAP_TLL_CHANNEL_CONF_CHRGVBUS
+ | OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI
+ | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF;
} else {
continue;
}
@@ -320,25 +336,18 @@ static int usbtll_omap_probe(struct platform_device *pdev)
}
}
-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);
+ /* only after this can omap_tll_enable/disable work */
+ spin_lock(&tll_lock);
+ tll_dev = dev;
+ spin_unlock(&tll_lock);
-err_usbtll_p2_fck:
- clk_put(tll->usbtll_p2_fck);
-
-err_usbtll_p1_fck:
- clk_put(tll->usbtll_p1_fck);
+ return 0;
-err_tll:
- kfree(tll);
+err_clk_alloc:
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
-end:
return ret;
}
@@ -351,36 +360,42 @@ end:
static int usbtll_omap_remove(struct platform_device *pdev)
{
struct usbtll_omap *tll = platform_get_drvdata(pdev);
+ int i;
+
+ spin_lock(&tll_lock);
+ tll_dev = NULL;
+ spin_unlock(&tll_lock);
+
+ for (i = 0; i < tll->nch; i++)
+ if (!IS_ERR(tll->ch_clk[i]))
+ clk_put(tll->ch_clk[i]);
- 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;
+ struct usbhs_omap_platform_data *pdata = tll->pdata;
+ int i;
dev_dbg(dev, "usbtll_runtime_resume\n");
- if (!pdata) {
- dev_dbg(dev, "missing platform_data\n");
- return -ENODEV;
- }
-
- spin_lock_irqsave(&tll->lock, flags);
+ for (i = 0; i < tll->nch; i++) {
+ if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
+ int r;
- 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);
+ if (IS_ERR(tll->ch_clk[i]))
+ continue;
- spin_unlock_irqrestore(&tll->lock, flags);
+ r = clk_enable(tll->ch_clk[i]);
+ if (r) {
+ dev_err(dev,
+ "Error enabling ch %d clock: %d\n", i, r);
+ }
+ }
+ }
return 0;
}
@@ -388,26 +403,18 @@ static int usbtll_runtime_resume(struct device *dev)
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;
+ struct usbhs_omap_platform_data *pdata = tll->pdata;
+ int i;
dev_dbg(dev, "usbtll_runtime_suspend\n");
- if (!pdata) {
- dev_dbg(dev, "missing platform_data\n");
- return -ENODEV;
+ for (i = 0; i < tll->nch; i++) {
+ if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
+ if (!IS_ERR(tll->ch_clk[i]))
+ clk_disable(tll->ch_clk[i]);
+ }
}
- 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;
}
@@ -429,21 +436,39 @@ static struct platform_driver usbtll_omap_driver = {
int omap_tll_enable(void)
{
- if (!tll_pdev) {
- pr_err("missing omap usbhs tll platform_data\n");
- return -ENODEV;
+ int ret;
+
+ spin_lock(&tll_lock);
+
+ if (!tll_dev) {
+ pr_err("%s: OMAP USB TLL not initialized\n", __func__);
+ ret = -ENODEV;
+ } else {
+ ret = pm_runtime_get_sync(tll_dev);
}
- return pm_runtime_get_sync(&tll_pdev->dev);
+
+ spin_unlock(&tll_lock);
+
+ return ret;
}
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;
+ int ret;
+
+ spin_lock(&tll_lock);
+
+ if (!tll_dev) {
+ pr_err("%s: OMAP USB TLL not initialized\n", __func__);
+ ret = -ENODEV;
+ } else {
+ ret = pm_runtime_put_sync(tll_dev);
}
- return pm_runtime_put_sync(&tll_pdev->dev);
+
+ spin_unlock(&tll_lock);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(omap_tll_disable);