forked from Minki/linux
ARM: mach-shmobile: armadillo800eva: add USB function support
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Tested-by: Simon Horman <horms@verge.net.au> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Kuninori Morimoto
Rafael J. Wysocki
parent
46cf668748
commit
1c96293e9f
@ -20,14 +20,17 @@
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/input.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/gpio_keys.h>
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#include <linux/sh_eth.h>
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#include <linux/videodev2.h>
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#include <linux/usb/renesas_usbhs.h>
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#include <mach/common.h>
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#include <mach/irqs.h>
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#include <asm/page.h>
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@ -90,6 +93,9 @@
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* 0 | SDHI1 | COM8 enable, COM14 disable
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* 1 | SDHI1 | COM8 enable, COM14 disable
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* -12345678-+---------------+----------------------------
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* 0 | USB0 | COM20 enable, COM24 disable
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* 1 | USB0 | COM20 disable, COM24 enable
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* -12345678-+---------------+----------------------------
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* 00 | JTAG | SH-X2
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* 10 | JTAG | ARM
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* 01 | JTAG | -
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@ -97,6 +103,195 @@
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*-----------+---------------+----------------------------
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*/
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/*
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* USB function
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*
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* When you use USB Function,
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* set SW1.6 ON, and connect cable to CN24.
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*
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* USBF needs workaround on R8A7740 chip.
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* These are a little bit complex.
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* see
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* usbhsf_power_ctrl()
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*
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* CAUTION
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*
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* It uses autonomy mode for USB hotplug at this point
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* (= usbhs_private.platform_callback.get_vbus is NULL),
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* since we don't know what's happen on PM control
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* on this workaround.
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*/
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#define USBCR1 0xe605810a
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#define USBH 0xC6700000
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#define USBH_USBCTR 0x10834
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struct usbhsf_private {
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struct clk *phy;
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struct clk *usb24;
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struct clk *pci;
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struct clk *func;
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struct clk *host;
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void __iomem *usbh_base;
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struct renesas_usbhs_platform_info info;
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};
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#define usbhsf_get_priv(pdev) \
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container_of(renesas_usbhs_get_info(pdev), \
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struct usbhsf_private, info)
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static int usbhsf_get_id(struct platform_device *pdev)
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{
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return USBHS_GADGET;
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}
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static void usbhsf_power_ctrl(struct platform_device *pdev,
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void __iomem *base, int enable)
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{
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struct usbhsf_private *priv = usbhsf_get_priv(pdev);
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/*
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* Work around for USB Function.
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* It needs USB host clock, and settings
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*/
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if (enable) {
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/*
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* enable all the related usb clocks
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* for usb workaround
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*/
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clk_enable(priv->usb24);
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clk_enable(priv->pci);
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clk_enable(priv->host);
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clk_enable(priv->func);
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clk_enable(priv->phy);
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/*
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* set USBCR1
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*
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* Port1 is driven by USB function,
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* Port2 is driven by USB HOST
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* One HOST (Port1 or Port2 is HOST)
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* USB PLL input clock = 24MHz
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*/
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__raw_writew(0xd750, USBCR1);
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mdelay(1);
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/*
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* start USB Host
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*/
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__raw_writel(0x0000000c, priv->usbh_base + USBH_USBCTR);
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__raw_writel(0x00000008, priv->usbh_base + USBH_USBCTR);
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mdelay(10);
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/*
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* USB PHY Power ON
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*/
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__raw_writew(0xd770, USBCR1);
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__raw_writew(0x4000, base + 0x102); /* USBF :: SUSPMODE */
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} else {
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__raw_writel(0x0000010f, priv->usbh_base + USBH_USBCTR);
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__raw_writew(0xd7c0, USBCR1); /* GPIO */
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clk_disable(priv->phy);
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clk_disable(priv->func); /* usb work around */
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clk_disable(priv->host); /* usb work around */
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clk_disable(priv->pci); /* usb work around */
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clk_disable(priv->usb24); /* usb work around */
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}
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}
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static void usbhsf_hardware_exit(struct platform_device *pdev)
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{
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struct usbhsf_private *priv = usbhsf_get_priv(pdev);
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if (!IS_ERR(priv->phy))
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clk_put(priv->phy);
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if (!IS_ERR(priv->usb24))
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clk_put(priv->usb24);
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if (!IS_ERR(priv->pci))
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clk_put(priv->pci);
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if (!IS_ERR(priv->host))
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clk_put(priv->host);
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if (!IS_ERR(priv->func))
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clk_put(priv->func);
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if (priv->usbh_base)
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iounmap(priv->usbh_base);
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priv->phy = NULL;
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priv->usb24 = NULL;
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priv->pci = NULL;
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priv->host = NULL;
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priv->func = NULL;
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priv->usbh_base = NULL;
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}
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static int usbhsf_hardware_init(struct platform_device *pdev)
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{
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struct usbhsf_private *priv = usbhsf_get_priv(pdev);
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priv->phy = clk_get(&pdev->dev, "phy");
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priv->usb24 = clk_get(&pdev->dev, "usb24");
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priv->pci = clk_get(&pdev->dev, "pci");
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priv->func = clk_get(&pdev->dev, "func");
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priv->host = clk_get(&pdev->dev, "host");
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priv->usbh_base = ioremap_nocache(USBH, 0x20000);
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if (IS_ERR(priv->phy) ||
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IS_ERR(priv->usb24) ||
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IS_ERR(priv->pci) ||
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IS_ERR(priv->host) ||
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IS_ERR(priv->func) ||
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!priv->usbh_base) {
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dev_err(&pdev->dev, "USB clock setting failed\n");
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usbhsf_hardware_exit(pdev);
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return -EIO;
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}
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/* usb24 use 1/1 of parent clock (= usb24s = 24MHz) */
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clk_set_rate(priv->usb24,
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clk_get_rate(clk_get_parent(priv->usb24)));
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return 0;
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}
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static struct usbhsf_private usbhsf_private = {
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.info = {
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.platform_callback = {
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.get_id = usbhsf_get_id,
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.hardware_init = usbhsf_hardware_init,
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.hardware_exit = usbhsf_hardware_exit,
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.power_ctrl = usbhsf_power_ctrl,
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},
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.driver_param = {
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.buswait_bwait = 5,
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.detection_delay = 5,
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},
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}
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};
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static struct resource usbhsf_resources[] = {
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{
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.name = "USBHS",
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.start = 0xe6890000,
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.end = 0xe6890104 - 1,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = evt2irq(0x0A20),
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device usbhsf_device = {
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.name = "renesas_usbhs",
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.dev = {
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.platform_data = &usbhsf_private.info,
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},
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.id = -1,
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.num_resources = ARRAY_SIZE(usbhsf_resources),
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.resource = usbhsf_resources,
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};
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/* Ether */
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static struct sh_eth_plat_data sh_eth_platdata = {
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.phy = 0x00, /* LAN8710A */
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@ -224,11 +419,41 @@ static struct platform_device *eva_devices[] __initdata = {
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&sh_eth_device,
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};
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static void __init eva_clock_init(void)
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{
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struct clk *system = clk_get(NULL, "system_clk");
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struct clk *xtal1 = clk_get(NULL, "extal1");
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struct clk *usb24s = clk_get(NULL, "usb24s");
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if (IS_ERR(system) ||
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IS_ERR(xtal1) ||
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IS_ERR(usb24s)) {
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pr_err("armadillo800eva board clock init failed\n");
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goto clock_error;
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}
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/* armadillo 800 eva extal1 is 24MHz */
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clk_set_rate(xtal1, 24000000);
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/* usb24s use extal1 (= system) clock (= 24MHz) */
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clk_set_parent(usb24s, system);
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clock_error:
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if (!IS_ERR(system))
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clk_put(system);
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if (!IS_ERR(xtal1))
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clk_put(xtal1);
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if (!IS_ERR(usb24s))
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clk_put(usb24s);
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}
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/*
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* board init
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*/
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static void __init eva_init(void)
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{
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eva_clock_init();
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r8a7740_pinmux_init();
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/* SCIFA1 */
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@ -302,6 +527,18 @@ static void __init eva_init(void)
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gpio_request(GPIO_PORT18, NULL); /* PHY_RST */
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gpio_direction_output(GPIO_PORT18, 1);
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/* USB */
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gpio_request(GPIO_PORT159, NULL); /* USB_DEVICE_MODE */
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gpio_direction_input(GPIO_PORT159);
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if (gpio_get_value(GPIO_PORT159)) {
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/* USB Host */
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} else {
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/* USB Func */
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gpio_request(GPIO_FN_VBUS, NULL);
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platform_device_register(&usbhsf_device);
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}
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/*
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* CAUTION
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*
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@ -326,17 +563,7 @@ static void __init eva_init(void)
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static void __init eva_earlytimer_init(void)
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{
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struct clk *xtal1;
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r8a7740_clock_init(MD_CK0 | MD_CK2);
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xtal1 = clk_get(NULL, "extal1");
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if (!IS_ERR(xtal1)) {
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/* armadillo 800 eva extal1 is 24MHz */
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clk_set_rate(xtal1, 24000000);
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clk_put(xtal1);
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}
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shmobile_earlytimer_init();
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}
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