forked from Minki/linux
3e701cdfe6
We have support for a few new drivers: - Samsung s2mps11 - Wolfson Microelectronics wm5102 and wm5110 - Marvell 88PM800 and 88PM805 - TI twl6041 We also have our regular driver improvements: - Device tree and IRQ domain support for STE AB8500 - Regmap and devm_* API conversion for TI tps6586x - Device tree support for Samsung max77686 - devm_* API conversion for STE AB3100 Besides that, quite a lot of fixing and cleanup for mc13xxx, tps65910, tps65090, da9052 and twl-core. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJQFpGVAAoJEIqAPN1PVmxKFNoP/1dkYngrxxV6cxdyLJ74APhG lVKPgaDxQhdgfwCZJmMeZK1UphZo80cWnEXG6sTHZUEQdTaslSJu5SuPfUM+fo7e 52/dU0nx0ZE04pwPQLHbidS4TmHlbLg9oM2kmIf9RO5rg34GodwVgRL/4+k1qvhz aWYJt9erFhQOpqaSX66mXHSuhvzHypbcE7d2B2Ykmh3NoYiH2w9H9KmIbbb+ZLq8 +Bp/i5Ys/vfooo+8IE2w6KZfIzMwsmmtWjjr/38yuQJaKZCh/zn23DM9HsdrVf++ RzfniRF4YBxmeKi7zi8MFIYys8filTCXA9dXbGSAKCuUCT37yZRnUxTeN1bn7Bux A7KRpG7pUKQKVKqCTndvK5LcQKlT33XyW2ZzV1wVWX2JkCJ+gilPeykb8IabNvGX nIp0STEGR/WdCLEAKo8pJF7Usn0RuUzAug02SG/mQ6dpnLoZqp0Od5W7gRhT7M7h hXr/xKJ6cG5YwicpAdy5kJJ0dRgQrtaHwxrF0B68AXZ7CmAtkPuEGCYhUCFnGQUH XJ0CodAqqVBRyYiQS4zIpIh2nqhIdsgv4OC1+kVLbubQk+PR88zG9Jvg6i1HQi/A OHi7N5Wite3YUrs3sBzDKnEc/Il2YRhVaz2SLVNfZR0PS7hywHN3rK/tVFINTgei jNEz1H6hu7ToNLfs0UzP =c28c -----END PGP SIGNATURE----- Merge tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 Pull MFD bits from Samuel Ortiz: "We have support for a few new drivers: - Samsung s2mps11 - Wolfson Microelectronics wm5102 and wm5110 - Marvell 88PM800 and 88PM805 - TI twl6041 We also have our regular driver improvements: - Device tree and IRQ domain support for STE AB8500 - Regmap and devm_* API conversion for TI tps6586x - Device tree support for Samsung max77686 - devm_* API conversion for STE AB3100 Besides that, quite a lot of fixing and cleanup for mc13xxx, tps65910, tps65090, da9052 and twl-core." Fix up mostly trivial conflicts, with the exception of drivers/usb/host/ehci-omap.c in particular, which had some re-organization of the reset sequence (commit1a49e2ac96
: "EHCI: centralize controller initialization") that clashed with commit2761a63945
("mfd: USB: Fix the omap-usb EHCI ULPI PHY reset fix issues"). In particular, commit2761a63945
moved the usb_add_hcd() to the *middle* of the reset sequence, which clashes fairly badly with the reset sequence re-organization (although it could have been done inside the new omap_ehci_init() function). I left that part of commit2761a63945
just undone. * tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (110 commits) mfd: Ensure AB8500 platform data is passed through db8500-prcmu to MFD Core mfd: Arizone core should select MFD_CORE mfd: Fix arizona-irq.c build by selecting REGMAP_IRQ mfd: Add debug trace on entering and leaving arizone runtime suspend mfd: Correct tps65090 cell names mfd: Remove gpio support from tps6586x core driver ARM: tegra: defconfig: Enable tps6586x gpio gpio: tps6586x: Add gpio support through platform driver mfd: Cache tps6586x register through regmap mfd: Use regmap for tps6586x register access. mfd: Use devm managed resources for tps6586x input: Add onkey support for 88PM80X PMIC mfd: Add support for twl6041 mfd: Fix twl6040 revision information mfd: Matches should be NULL when populate anatop child devices input: ab8500-ponkey: Create AB8500 domain IRQ mapping mfd: Add missing out of memory check for pcf50633 Documentation: Describe the AB8500 Device Tree bindings mfd: Add tps65910 32-kHz-crystal-input init mfd: Drop modifying mc13xxx driver's id_table in probe ...
546 lines
14 KiB
C
546 lines
14 KiB
C
/*
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* ehci-omap.c - driver for USBHOST on OMAP3/4 processors
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*
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* Bus Glue for the EHCI controllers in OMAP3/4
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* Tested on several OMAP3 boards, and OMAP4 Pandaboard
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*
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* Copyright (C) 2007-2011 Texas Instruments, Inc.
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* Author: Vikram Pandita <vikram.pandita@ti.com>
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* Author: Anand Gadiyar <gadiyar@ti.com>
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* Author: Keshava Munegowda <keshava_mgowda@ti.com>
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*
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* Copyright (C) 2009 Nokia Corporation
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* Contact: Felipe Balbi <felipe.balbi@nokia.com>
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*
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* Based on "ehci-fsl.c" and "ehci-au1xxx.c" ehci glue layers
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* TODO (last updated Feb 27, 2010):
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* - add kernel-doc
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* - enable AUTOIDLE
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* - add suspend/resume
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* - add HSIC and TLL support
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* - convert to use hwmod and runtime PM
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*/
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/usb/ulpi.h>
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#include <plat/usb.h>
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#include <linux/regulator/consumer.h>
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#include <linux/pm_runtime.h>
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#include <linux/gpio.h>
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#include <linux/clk.h>
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/* EHCI Register Set */
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#define EHCI_INSNREG04 (0xA0)
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#define EHCI_INSNREG04_DISABLE_UNSUSPEND (1 << 5)
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#define EHCI_INSNREG05_ULPI (0xA4)
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#define EHCI_INSNREG05_ULPI_CONTROL_SHIFT 31
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#define EHCI_INSNREG05_ULPI_PORTSEL_SHIFT 24
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#define EHCI_INSNREG05_ULPI_OPSEL_SHIFT 22
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#define EHCI_INSNREG05_ULPI_REGADD_SHIFT 16
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#define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
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#define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
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/* Errata i693 */
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static struct clk *utmi_p1_fck;
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static struct clk *utmi_p2_fck;
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static struct clk *xclk60mhsp1_ck;
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static struct clk *xclk60mhsp2_ck;
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static struct clk *usbhost_p1_fck;
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static struct clk *usbhost_p2_fck;
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static struct clk *init_60m_fclk;
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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ehci_omap_hc_driver;
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static inline void ehci_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 ehci_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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/* Erratum i693 workaround sequence */
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static void omap_ehci_erratum_i693(struct ehci_hcd *ehci)
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{
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int ret = 0;
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/* Switch to the internal 60 MHz clock */
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ret = clk_set_parent(utmi_p1_fck, init_60m_fclk);
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if (ret != 0)
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ehci_err(ehci, "init_60m_fclk set parent"
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"failed error:%d\n", ret);
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ret = clk_set_parent(utmi_p2_fck, init_60m_fclk);
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if (ret != 0)
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ehci_err(ehci, "init_60m_fclk set parent"
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"failed error:%d\n", ret);
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clk_enable(usbhost_p1_fck);
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clk_enable(usbhost_p2_fck);
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/* Wait 1ms and switch back to the external clock */
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mdelay(1);
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ret = clk_set_parent(utmi_p1_fck, xclk60mhsp1_ck);
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if (ret != 0)
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ehci_err(ehci, "xclk60mhsp1_ck set parent"
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"failed error:%d\n", ret);
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ret = clk_set_parent(utmi_p2_fck, xclk60mhsp2_ck);
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if (ret != 0)
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ehci_err(ehci, "xclk60mhsp2_ck set parent"
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"failed error:%d\n", ret);
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clk_disable(usbhost_p1_fck);
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clk_disable(usbhost_p2_fck);
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}
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static void omap_ehci_soft_phy_reset(struct usb_hcd *hcd, u8 port)
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{
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unsigned long timeout = jiffies + msecs_to_jiffies(1000);
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unsigned reg = 0;
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reg = ULPI_FUNC_CTRL_RESET
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/* FUNCTION_CTRL_SET register */
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| (ULPI_SET(ULPI_FUNC_CTRL) << EHCI_INSNREG05_ULPI_REGADD_SHIFT)
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/* Write */
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| (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT)
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/* PORTn */
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| ((port + 1) << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT)
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/* start ULPI access*/
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| (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT);
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ehci_write(hcd->regs, EHCI_INSNREG05_ULPI, reg);
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/* Wait for ULPI access completion */
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while ((ehci_read(hcd->regs, EHCI_INSNREG05_ULPI)
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& (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT))) {
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cpu_relax();
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if (time_after(jiffies, timeout)) {
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dev_dbg(hcd->self.controller,
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"phy reset operation timed out\n");
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break;
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}
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}
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}
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static int omap_ehci_init(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int rc;
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struct ehci_hcd_omap_platform_data *pdata;
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pdata = hcd->self.controller->platform_data;
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/* Hold PHYs in reset while initializing EHCI controller */
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if (pdata->phy_reset) {
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if (gpio_is_valid(pdata->reset_gpio_port[0]))
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gpio_set_value_cansleep(pdata->reset_gpio_port[0], 0);
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if (gpio_is_valid(pdata->reset_gpio_port[1]))
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gpio_set_value_cansleep(pdata->reset_gpio_port[1], 0);
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/* Hold the PHY in RESET for enough time till DIR is high */
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udelay(10);
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}
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/* Soft reset the PHY using PHY reset command over ULPI */
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if (pdata->port_mode[0] == OMAP_EHCI_PORT_MODE_PHY)
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omap_ehci_soft_phy_reset(hcd, 0);
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if (pdata->port_mode[1] == OMAP_EHCI_PORT_MODE_PHY)
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omap_ehci_soft_phy_reset(hcd, 1);
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/* we know this is the memory we want, no need to ioremap again */
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ehci->caps = hcd->regs;
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rc = ehci_setup(hcd);
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if (pdata->phy_reset) {
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/* Hold the PHY in RESET for enough time till
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* PHY is settled and ready
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*/
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udelay(10);
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if (gpio_is_valid(pdata->reset_gpio_port[0]))
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gpio_set_value_cansleep(pdata->reset_gpio_port[0], 1);
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if (gpio_is_valid(pdata->reset_gpio_port[1]))
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gpio_set_value_cansleep(pdata->reset_gpio_port[1], 1);
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}
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/* root ports should always stay powered */
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ehci_port_power(ehci, 1);
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return rc;
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}
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static int omap_ehci_hub_control(
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struct usb_hcd *hcd,
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u16 typeReq,
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u16 wValue,
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u16 wIndex,
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char *buf,
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u16 wLength
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)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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u32 __iomem *status_reg = &ehci->regs->port_status[
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(wIndex & 0xff) - 1];
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u32 temp;
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unsigned long flags;
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int retval = 0;
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spin_lock_irqsave(&ehci->lock, flags);
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if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
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temp = ehci_readl(ehci, status_reg);
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if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
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retval = -EPIPE;
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goto done;
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}
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temp &= ~PORT_WKCONN_E;
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temp |= PORT_WKDISC_E | PORT_WKOC_E;
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ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
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omap_ehci_erratum_i693(ehci);
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set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);
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goto done;
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}
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spin_unlock_irqrestore(&ehci->lock, flags);
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/* Handle the hub control events here */
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return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
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done:
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spin_unlock_irqrestore(&ehci->lock, flags);
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return retval;
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}
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static void disable_put_regulator(
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struct ehci_hcd_omap_platform_data *pdata)
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{
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int i;
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for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
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if (pdata->regulator[i]) {
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regulator_disable(pdata->regulator[i]);
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regulator_put(pdata->regulator[i]);
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}
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}
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}
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/* configure so an HC device and id are always provided */
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/* always called with process context; sleeping is OK */
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/**
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* ehci_hcd_omap_probe - initialize TI-based HCDs
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*
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* Allocates basic resources for this USB host controller, and
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* then invokes the start() method for the HCD associated with it
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* through the hotplug entry's driver_data.
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*/
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static int ehci_hcd_omap_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ehci_hcd_omap_platform_data *pdata = dev->platform_data;
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struct resource *res;
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struct usb_hcd *hcd;
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void __iomem *regs;
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int ret = -ENODEV;
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int irq;
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int i;
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char supply[7];
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if (usb_disabled())
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return -ENODEV;
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if (!dev->parent) {
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dev_err(dev, "Missing parent device\n");
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return -ENODEV;
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}
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irq = platform_get_irq_byname(pdev, "ehci-irq");
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if (irq < 0) {
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dev_err(dev, "EHCI irq failed\n");
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return -ENODEV;
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}
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res = platform_get_resource_byname(pdev,
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IORESOURCE_MEM, "ehci");
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if (!res) {
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dev_err(dev, "UHH EHCI get resource failed\n");
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return -ENODEV;
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}
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regs = ioremap(res->start, resource_size(res));
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if (!regs) {
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dev_err(dev, "UHH EHCI ioremap failed\n");
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return -ENOMEM;
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}
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hcd = usb_create_hcd(&ehci_omap_hc_driver, dev,
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dev_name(dev));
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if (!hcd) {
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dev_err(dev, "failed to create hcd with err %d\n", ret);
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ret = -ENOMEM;
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goto err_io;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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hcd->regs = regs;
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/* get ehci regulator and enable */
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for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
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if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY) {
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pdata->regulator[i] = NULL;
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continue;
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}
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snprintf(supply, sizeof(supply), "hsusb%d", i);
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pdata->regulator[i] = regulator_get(dev, supply);
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if (IS_ERR(pdata->regulator[i])) {
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pdata->regulator[i] = NULL;
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dev_dbg(dev,
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"failed to get ehci port%d regulator\n", i);
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} else {
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regulator_enable(pdata->regulator[i]);
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}
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}
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pm_runtime_enable(dev);
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pm_runtime_get_sync(dev);
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/*
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* An undocumented "feature" in the OMAP3 EHCI controller,
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* causes suspended ports to be taken out of suspend when
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* the USBCMD.Run/Stop bit is cleared (for example when
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* we do ehci_bus_suspend).
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* This breaks suspend-resume if the root-hub is allowed
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* to suspend. Writing 1 to this undocumented register bit
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* disables this feature and restores normal behavior.
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*/
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ehci_write(regs, EHCI_INSNREG04,
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EHCI_INSNREG04_DISABLE_UNSUSPEND);
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ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (ret) {
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dev_err(dev, "failed to add hcd with err %d\n", ret);
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goto err_pm_runtime;
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}
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/* get clocks */
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utmi_p1_fck = clk_get(dev, "utmi_p1_gfclk");
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if (IS_ERR(utmi_p1_fck)) {
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ret = PTR_ERR(utmi_p1_fck);
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dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
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goto err_add_hcd;
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}
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xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck");
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if (IS_ERR(xclk60mhsp1_ck)) {
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ret = PTR_ERR(xclk60mhsp1_ck);
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dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret);
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goto err_utmi_p1_fck;
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}
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utmi_p2_fck = clk_get(dev, "utmi_p2_gfclk");
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if (IS_ERR(utmi_p2_fck)) {
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ret = PTR_ERR(utmi_p2_fck);
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dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
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goto err_xclk60mhsp1_ck;
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}
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xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck");
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if (IS_ERR(xclk60mhsp2_ck)) {
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ret = PTR_ERR(xclk60mhsp2_ck);
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dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret);
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goto err_utmi_p2_fck;
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}
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usbhost_p1_fck = clk_get(dev, "usb_host_hs_utmi_p1_clk");
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if (IS_ERR(usbhost_p1_fck)) {
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ret = PTR_ERR(usbhost_p1_fck);
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dev_err(dev, "usbhost_p1_fck failed error:%d\n", ret);
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goto err_xclk60mhsp2_ck;
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}
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usbhost_p2_fck = clk_get(dev, "usb_host_hs_utmi_p2_clk");
|
|
if (IS_ERR(usbhost_p2_fck)) {
|
|
ret = PTR_ERR(usbhost_p2_fck);
|
|
dev_err(dev, "usbhost_p2_fck failed error:%d\n", ret);
|
|
goto err_usbhost_p1_fck;
|
|
}
|
|
|
|
init_60m_fclk = clk_get(dev, "init_60m_fclk");
|
|
if (IS_ERR(init_60m_fclk)) {
|
|
ret = PTR_ERR(init_60m_fclk);
|
|
dev_err(dev, "init_60m_fclk failed error:%d\n", ret);
|
|
goto err_usbhost_p2_fck;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_usbhost_p2_fck:
|
|
clk_put(usbhost_p2_fck);
|
|
|
|
err_usbhost_p1_fck:
|
|
clk_put(usbhost_p1_fck);
|
|
|
|
err_xclk60mhsp2_ck:
|
|
clk_put(xclk60mhsp2_ck);
|
|
|
|
err_utmi_p2_fck:
|
|
clk_put(utmi_p2_fck);
|
|
|
|
err_xclk60mhsp1_ck:
|
|
clk_put(xclk60mhsp1_ck);
|
|
|
|
err_utmi_p1_fck:
|
|
clk_put(utmi_p1_fck);
|
|
|
|
err_add_hcd:
|
|
usb_remove_hcd(hcd);
|
|
|
|
err_pm_runtime:
|
|
disable_put_regulator(pdata);
|
|
pm_runtime_put_sync(dev);
|
|
usb_put_hcd(hcd);
|
|
|
|
err_io:
|
|
iounmap(regs);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* ehci_hcd_omap_remove - shutdown processing for EHCI HCDs
|
|
* @pdev: USB Host Controller being removed
|
|
*
|
|
* Reverses the effect of usb_ehci_hcd_omap_probe(), first invoking
|
|
* the HCD's stop() method. It is always called from a thread
|
|
* context, normally "rmmod", "apmd", or something similar.
|
|
*/
|
|
static int ehci_hcd_omap_remove(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
|
struct ehci_hcd_omap_platform_data *pdata = dev->platform_data;
|
|
|
|
usb_remove_hcd(hcd);
|
|
disable_put_regulator(dev->platform_data);
|
|
iounmap(hcd->regs);
|
|
usb_put_hcd(hcd);
|
|
|
|
clk_put(utmi_p1_fck);
|
|
clk_put(utmi_p2_fck);
|
|
clk_put(xclk60mhsp1_ck);
|
|
clk_put(xclk60mhsp2_ck);
|
|
clk_put(usbhost_p1_fck);
|
|
clk_put(usbhost_p2_fck);
|
|
clk_put(init_60m_fclk);
|
|
|
|
pm_runtime_put_sync(dev);
|
|
pm_runtime_disable(dev);
|
|
|
|
if (pdata->phy_reset) {
|
|
if (gpio_is_valid(pdata->reset_gpio_port[0]))
|
|
gpio_free(pdata->reset_gpio_port[0]);
|
|
|
|
if (gpio_is_valid(pdata->reset_gpio_port[1]))
|
|
gpio_free(pdata->reset_gpio_port[1]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void ehci_hcd_omap_shutdown(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev);
|
|
|
|
if (hcd->driver->shutdown)
|
|
hcd->driver->shutdown(hcd);
|
|
}
|
|
|
|
static struct platform_driver ehci_hcd_omap_driver = {
|
|
.probe = ehci_hcd_omap_probe,
|
|
.remove = ehci_hcd_omap_remove,
|
|
.shutdown = ehci_hcd_omap_shutdown,
|
|
/*.suspend = ehci_hcd_omap_suspend, */
|
|
/*.resume = ehci_hcd_omap_resume, */
|
|
.driver = {
|
|
.name = "ehci-omap",
|
|
}
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static const struct hc_driver ehci_omap_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "OMAP-EHCI Host Controller",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = omap_ehci_init,
|
|
.start = ehci_run,
|
|
.stop = ehci_stop,
|
|
.shutdown = ehci_shutdown,
|
|
|
|
/*
|
|
* managing i/o requests and associated device resources
|
|
*/
|
|
.urb_enqueue = ehci_urb_enqueue,
|
|
.urb_dequeue = ehci_urb_dequeue,
|
|
.endpoint_disable = ehci_endpoint_disable,
|
|
.endpoint_reset = ehci_endpoint_reset,
|
|
|
|
/*
|
|
* scheduling support
|
|
*/
|
|
.get_frame_number = ehci_get_frame,
|
|
|
|
/*
|
|
* root hub support
|
|
*/
|
|
.hub_status_data = ehci_hub_status_data,
|
|
.hub_control = omap_ehci_hub_control,
|
|
.bus_suspend = ehci_bus_suspend,
|
|
.bus_resume = ehci_bus_resume,
|
|
|
|
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
|
|
};
|
|
|
|
MODULE_ALIAS("platform:omap-ehci");
|
|
MODULE_AUTHOR("Texas Instruments, Inc.");
|
|
MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
|
|
|