diff options
Diffstat (limited to 'arch/arm/mach-pxa/pxa3xx-ulpi.c')
| -rw-r--r-- | arch/arm/mach-pxa/pxa3xx-ulpi.c | 385 |
1 files changed, 0 insertions, 385 deletions
diff --git a/arch/arm/mach-pxa/pxa3xx-ulpi.c b/arch/arm/mach-pxa/pxa3xx-ulpi.c deleted file mode 100644 index 4bd7da1f8657..000000000000 --- a/arch/arm/mach-pxa/pxa3xx-ulpi.c +++ /dev/null @@ -1,385 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/arm/mach-pxa/pxa3xx-ulpi.c - * - * code specific to pxa3xx aka Monahans - * - * Copyright (C) 2010 CompuLab Ltd. - * - * 2010-13-07: Igor Grinberg <grinberg@compulab.co.il> - * initial version: pxa310 USB Host mode support - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/platform_device.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/usb.h> -#include <linux/usb/otg.h> - -#include <mach/hardware.h> -#include "regs-u2d.h" -#include <linux/platform_data/usb-pxa3xx-ulpi.h> - -struct pxa3xx_u2d_ulpi { - struct clk *clk; - void __iomem *mmio_base; - - struct usb_phy *otg; - unsigned int ulpi_mode; -}; - -static struct pxa3xx_u2d_ulpi *u2d; - -static inline u32 u2d_readl(u32 reg) -{ - return __raw_readl(u2d->mmio_base + reg); -} - -static inline void u2d_writel(u32 reg, u32 val) -{ - __raw_writel(val, u2d->mmio_base + reg); -} - -#if defined(CONFIG_PXA310_ULPI) -enum u2d_ulpi_phy_mode { - SYNCH = 0, - CARKIT = (1 << 0), - SER_3PIN = (1 << 1), - SER_6PIN = (1 << 2), - LOWPOWER = (1 << 3), -}; - -static inline enum u2d_ulpi_phy_mode pxa310_ulpi_get_phymode(void) -{ - return (u2d_readl(U2DOTGUSR) >> 28) & 0xF; -} - -static int pxa310_ulpi_poll(void) -{ - int timeout = 50000; - - while (timeout--) { - if (!(u2d_readl(U2DOTGUCR) & U2DOTGUCR_RUN)) - return 0; - - cpu_relax(); - } - - pr_warn("%s: ULPI access timed out!\n", __func__); - - return -ETIMEDOUT; -} - -static int pxa310_ulpi_read(struct usb_phy *otg, u32 reg) -{ - int err; - - if (pxa310_ulpi_get_phymode() != SYNCH) { - pr_warn("%s: PHY is not in SYNCH mode!\n", __func__); - return -EBUSY; - } - - u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN | U2DOTGUCR_RNW | (reg << 16)); - msleep(5); - - err = pxa310_ulpi_poll(); - if (err) - return err; - - return u2d_readl(U2DOTGUCR) & U2DOTGUCR_RDATA; -} - -static int pxa310_ulpi_write(struct usb_phy *otg, u32 val, u32 reg) -{ - if (pxa310_ulpi_get_phymode() != SYNCH) { - pr_warn("%s: PHY is not in SYNCH mode!\n", __func__); - return -EBUSY; - } - - u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN | (reg << 16) | (val << 8)); - msleep(5); - - return pxa310_ulpi_poll(); -} - -struct usb_phy_io_ops pxa310_ulpi_access_ops = { - .read = pxa310_ulpi_read, - .write = pxa310_ulpi_write, -}; - -static void pxa310_otg_transceiver_rtsm(void) -{ - u32 u2dotgcr; - - /* put PHY to sync mode */ - u2dotgcr = u2d_readl(U2DOTGCR); - u2dotgcr |= U2DOTGCR_RTSM | U2DOTGCR_UTMID; - u2d_writel(U2DOTGCR, u2dotgcr); - msleep(10); - - /* setup OTG sync mode */ - u2dotgcr = u2d_readl(U2DOTGCR); - u2dotgcr |= U2DOTGCR_ULAF; - u2dotgcr &= ~(U2DOTGCR_SMAF | U2DOTGCR_CKAF); - u2d_writel(U2DOTGCR, u2dotgcr); -} - -static int pxa310_start_otg_host_transcvr(struct usb_bus *host) -{ - int err; - - pxa310_otg_transceiver_rtsm(); - - err = usb_phy_init(u2d->otg); - if (err) { - pr_err("OTG transceiver init failed"); - return err; - } - - err = otg_set_vbus(u2d->otg->otg, 1); - if (err) { - pr_err("OTG transceiver VBUS set failed"); - return err; - } - - err = otg_set_host(u2d->otg->otg, host); - if (err) - pr_err("OTG transceiver Host mode set failed"); - - return err; -} - -static int pxa310_start_otg_hc(struct usb_bus *host) -{ - u32 u2dotgcr; - int err; - - /* disable USB device controller */ - u2d_writel(U2DCR, u2d_readl(U2DCR) & ~U2DCR_UDE); - u2d_writel(U2DOTGCR, u2d_readl(U2DOTGCR) | U2DOTGCR_UTMID); - u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F); - - err = pxa310_start_otg_host_transcvr(host); - if (err) - return err; - - /* set xceiver mode */ - if (u2d->ulpi_mode & ULPI_IC_6PIN_SERIAL) - u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) & ~U2DP3CR_P2SS); - else if (u2d->ulpi_mode & ULPI_IC_3PIN_SERIAL) - u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) | U2DP3CR_P2SS); - - /* start OTG host controller */ - u2dotgcr = u2d_readl(U2DOTGCR) | U2DOTGCR_SMAF; - u2d_writel(U2DOTGCR, u2dotgcr & ~(U2DOTGCR_ULAF | U2DOTGCR_CKAF)); - - return 0; -} - -static void pxa310_stop_otg_hc(void) -{ - pxa310_otg_transceiver_rtsm(); - - otg_set_host(u2d->otg->otg, NULL); - otg_set_vbus(u2d->otg->otg, 0); - usb_phy_shutdown(u2d->otg); -} - -static void pxa310_u2d_setup_otg_hc(void) -{ - u32 u2dotgcr; - - u2dotgcr = u2d_readl(U2DOTGCR); - u2dotgcr |= U2DOTGCR_ULAF | U2DOTGCR_UTMID; - u2dotgcr &= ~(U2DOTGCR_SMAF | U2DOTGCR_CKAF); - u2d_writel(U2DOTGCR, u2dotgcr); - msleep(5); - u2d_writel(U2DOTGCR, u2dotgcr | U2DOTGCR_ULE); - msleep(5); - u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F); -} - -static int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata) -{ - unsigned int ulpi_mode = ULPI_OTG_DRVVBUS; - - if (pdata) { - if (pdata->ulpi_mode & ULPI_SER_6PIN) - ulpi_mode |= ULPI_IC_6PIN_SERIAL; - else if (pdata->ulpi_mode & ULPI_SER_3PIN) - ulpi_mode |= ULPI_IC_3PIN_SERIAL; - } - - u2d->ulpi_mode = ulpi_mode; - - u2d->otg = otg_ulpi_create(&pxa310_ulpi_access_ops, ulpi_mode); - if (!u2d->otg) - return -ENOMEM; - - u2d->otg->io_priv = u2d->mmio_base; - - return 0; -} - -static void pxa310_otg_exit(void) -{ - kfree(u2d->otg); -} -#else -static inline void pxa310_u2d_setup_otg_hc(void) {} -static inline int pxa310_start_otg_hc(struct usb_bus *host) -{ - return 0; -} -static inline void pxa310_stop_otg_hc(void) {} -static inline int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata) -{ - return 0; -} -static inline void pxa310_otg_exit(void) {} -#endif /* CONFIG_PXA310_ULPI */ - -int pxa3xx_u2d_start_hc(struct usb_bus *host) -{ - int err = 0; - - /* In case the PXA3xx ULPI isn't used, do nothing. */ - if (!u2d) - return 0; - - clk_prepare_enable(u2d->clk); - - if (cpu_is_pxa310()) { - pxa310_u2d_setup_otg_hc(); - err = pxa310_start_otg_hc(host); - } - - return err; -} -EXPORT_SYMBOL_GPL(pxa3xx_u2d_start_hc); - -void pxa3xx_u2d_stop_hc(struct usb_bus *host) -{ - /* In case the PXA3xx ULPI isn't used, do nothing. */ - if (!u2d) - return; - - if (cpu_is_pxa310()) - pxa310_stop_otg_hc(); - - clk_disable_unprepare(u2d->clk); -} -EXPORT_SYMBOL_GPL(pxa3xx_u2d_stop_hc); - -static int pxa3xx_u2d_probe(struct platform_device *pdev) -{ - struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data; - struct resource *r; - int err; - - u2d = kzalloc(sizeof(*u2d), GFP_KERNEL); - if (!u2d) - return -ENOMEM; - - u2d->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(u2d->clk)) { - dev_err(&pdev->dev, "failed to get u2d clock\n"); - err = PTR_ERR(u2d->clk); - goto err_free_mem; - } - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!r) { - dev_err(&pdev->dev, "no IO memory resource defined\n"); - err = -ENODEV; - goto err_put_clk; - } - - r = request_mem_region(r->start, resource_size(r), pdev->name); - if (!r) { - dev_err(&pdev->dev, "failed to request memory resource\n"); - err = -EBUSY; - goto err_put_clk; - } - - u2d->mmio_base = ioremap(r->start, resource_size(r)); - if (!u2d->mmio_base) { - dev_err(&pdev->dev, "ioremap() failed\n"); - err = -ENODEV; - goto err_free_res; - } - - if (pdata->init) { - err = pdata->init(&pdev->dev); - if (err) - goto err_free_io; - } - - /* Only PXA310 U2D has OTG functionality */ - if (cpu_is_pxa310()) { - err = pxa310_otg_init(pdata); - if (err) - goto err_free_plat; - } - - platform_set_drvdata(pdev, u2d); - - return 0; - -err_free_plat: - if (pdata->exit) - pdata->exit(&pdev->dev); -err_free_io: - iounmap(u2d->mmio_base); -err_free_res: - release_mem_region(r->start, resource_size(r)); -err_put_clk: - clk_put(u2d->clk); -err_free_mem: - kfree(u2d); - return err; -} - -static int pxa3xx_u2d_remove(struct platform_device *pdev) -{ - struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data; - struct resource *r; - - if (cpu_is_pxa310()) { - pxa310_stop_otg_hc(); - pxa310_otg_exit(); - } - - if (pdata->exit) - pdata->exit(&pdev->dev); - - platform_set_drvdata(pdev, NULL); - iounmap(u2d->mmio_base); - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(r->start, resource_size(r)); - - clk_put(u2d->clk); - - kfree(u2d); - - return 0; -} - -static struct platform_driver pxa3xx_u2d_ulpi_driver = { - .driver = { - .name = "pxa3xx-u2d", - }, - .probe = pxa3xx_u2d_probe, - .remove = pxa3xx_u2d_remove, -}; -module_platform_driver(pxa3xx_u2d_ulpi_driver); - -MODULE_DESCRIPTION("PXA3xx U2D ULPI driver"); -MODULE_AUTHOR("Igor Grinberg"); -MODULE_LICENSE("GPL v2"); |