diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-07 13:16:28 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-07 13:16:28 -0800 |
commit | 3e5b08cbbf78bedd316904ab0cf3b27119433ee5 (patch) | |
tree | 0365745c1b7441c1868551c024410c829c3accc6 /arch/arm/mach-omap2/omap_phy_internal.c | |
parent | da40d036fd716f0efb2917076220814b1e927ae1 (diff) | |
parent | 2af10844eb6ed104f9505bf3a7ba3ceb02264f31 (diff) |
Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (144 commits)
USB: add support for Dream Cheeky DL100B Webmail Notifier (1d34:0004)
USB: serial: ftdi_sio: add support for TIOCSERGETLSR
USB: ehci-mxc: Setup portsc register prior to accessing OTG viewport
USB: atmel_usba_udc: fix freeing irq in usba_udc_remove()
usb: ehci-omap: fix tll channel enable mask
usb: ohci-omap3: fix trivial typo
USB: gadget: ci13xxx: don't assume that PAGE_SIZE is 4096
USB: gadget: ci13xxx: fix complete() callback for no_interrupt rq's
USB: gadget: update ci13xxx to work with g_ether
USB: gadgets: ci13xxx: fix probing of compiled-in gadget drivers
Revert "USB: musb: pm: don't rely fully on clock support"
Revert "USB: musb: blackfin: pm: make it work"
USB: uas: Use GFP_NOIO instead of GFP_KERNEL in I/O submission path
USB: uas: Ensure we only bind to a UAS interface
USB: uas: Rename sense pipe and sense urb to status pipe and status urb
USB: uas: Use kzalloc instead of kmalloc
USB: uas: Fix up the Sense IU
usb: musb: core: kill unneeded #include's
DA8xx: assign name to MUSB IRQ resource
usb: gadget: g_ncm added
...
Manually fix up trivial conflicts in USB Kconfig changes in:
arch/arm/mach-omap2/Kconfig
arch/sh/Kconfig
drivers/usb/Kconfig
drivers/usb/host/ehci-hcd.c
and annoying chip clock data conflicts in:
arch/arm/mach-omap2/clock3xxx_data.c
arch/arm/mach-omap2/clock44xx_data.c
Diffstat (limited to 'arch/arm/mach-omap2/omap_phy_internal.c')
-rw-r--r-- | arch/arm/mach-omap2/omap_phy_internal.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-omap2/omap_phy_internal.c new file mode 100644 index 000000000000..745252c60e32 --- /dev/null +++ b/arch/arm/mach-omap2/omap_phy_internal.c @@ -0,0 +1,149 @@ +/* + * This file configures the internal USB PHY in OMAP4430. Used + * with TWL6030 transceiver and MUSB on OMAP4430. + * + * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Hema HK <hemahk@ti.com> + * + * 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, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include <linux/types.h> +#include <linux/delay.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/err.h> +#include <linux/usb.h> + +#include <plat/usb.h> + +/* OMAP control module register for UTMI PHY */ +#define CONTROL_DEV_CONF 0x300 +#define PHY_PD 0x1 + +#define USBOTGHS_CONTROL 0x33c +#define AVALID BIT(0) +#define BVALID BIT(1) +#define VBUSVALID BIT(2) +#define SESSEND BIT(3) +#define IDDIG BIT(4) + +static struct clk *phyclk, *clk48m, *clk32k; +static void __iomem *ctrl_base; + +int omap4430_phy_init(struct device *dev) +{ + ctrl_base = ioremap(OMAP443X_SCM_BASE, SZ_1K); + if (!ctrl_base) { + dev_err(dev, "control module ioremap failed\n"); + return -ENOMEM; + } + /* Power down the phy */ + __raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF); + phyclk = clk_get(dev, "ocp2scp_usb_phy_ick"); + + if (IS_ERR(phyclk)) { + dev_err(dev, "cannot clk_get ocp2scp_usb_phy_ick\n"); + iounmap(ctrl_base); + return PTR_ERR(phyclk); + } + + clk48m = clk_get(dev, "ocp2scp_usb_phy_phy_48m"); + if (IS_ERR(clk48m)) { + dev_err(dev, "cannot clk_get ocp2scp_usb_phy_phy_48m\n"); + clk_put(phyclk); + iounmap(ctrl_base); + return PTR_ERR(clk48m); + } + + clk32k = clk_get(dev, "usb_phy_cm_clk32k"); + if (IS_ERR(clk32k)) { + dev_err(dev, "cannot clk_get usb_phy_cm_clk32k\n"); + clk_put(phyclk); + clk_put(clk48m); + iounmap(ctrl_base); + return PTR_ERR(clk32k); + } + return 0; +} + +int omap4430_phy_set_clk(struct device *dev, int on) +{ + static int state; + + if (on && !state) { + /* Enable the phy clocks */ + clk_enable(phyclk); + clk_enable(clk48m); + clk_enable(clk32k); + state = 1; + } else if (state) { + /* Disable the phy clocks */ + clk_disable(phyclk); + clk_disable(clk48m); + clk_disable(clk32k); + state = 0; + } + return 0; +} + +int omap4430_phy_power(struct device *dev, int ID, int on) +{ + if (on) { + /* enabled the clocks */ + omap4430_phy_set_clk(dev, 1); + /* power on the phy */ + if (__raw_readl(ctrl_base + CONTROL_DEV_CONF) & PHY_PD) { + __raw_writel(~PHY_PD, ctrl_base + CONTROL_DEV_CONF); + mdelay(200); + } + if (ID) + /* enable VBUS valid, IDDIG groung */ + __raw_writel(AVALID | VBUSVALID, ctrl_base + + USBOTGHS_CONTROL); + else + /* + * Enable VBUS Valid, AValid and IDDIG + * high impedence + */ + __raw_writel(IDDIG | AVALID | VBUSVALID, + ctrl_base + USBOTGHS_CONTROL); + } else { + /* Enable session END and IDIG to high impedence. */ + __raw_writel(SESSEND | IDDIG, ctrl_base + + USBOTGHS_CONTROL); + /* Disable the clocks */ + omap4430_phy_set_clk(dev, 0); + /* Power down the phy */ + __raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF); + } + + return 0; +} + +int omap4430_phy_exit(struct device *dev) +{ + if (ctrl_base) + iounmap(ctrl_base); + if (phyclk) + clk_put(phyclk); + if (clk48m) + clk_put(clk48m); + if (clk32k) + clk_put(clk32k); + + return 0; +} |