diff options
Diffstat (limited to 'drivers/usb/host/ohci-pxa27x.c')
| -rw-r--r-- | drivers/usb/host/ohci-pxa27x.c | 624 |
1 files changed, 624 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c new file mode 100644 index 000000000..a1dad8745 --- /dev/null +++ b/drivers/usb/host/ohci-pxa27x.c @@ -0,0 +1,624 @@ +// SPDX-License-Identifier: GPL-1.0+ +/* + * OHCI HCD (Host Controller Driver) for USB. + * + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * (C) Copyright 2002 Hewlett-Packard Company + * + * Bus Glue for pxa27x + * + * Written by Christopher Hoover <ch@hpl.hp.com> + * Based on fragments of previous driver by Russell King et al. + * + * Modified for LH7A404 from ohci-sa1111.c + * by Durgesh Pattamatta <pattamattad@sharpsec.com> + * + * Modified for pxa27x from ohci-lh7a404.c + * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004 + * + * This file is licenced under the GPL. + */ + +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/of_gpio.h> +#include <linux/platform_data/usb-ohci-pxa27x.h> +#include <linux/platform_data/usb-pxa3xx-ulpi.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/signal.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> +#include <linux/usb/otg.h> +#include <linux/soc/pxa/cpu.h> + +#include "ohci.h" + +#define DRIVER_DESC "OHCI PXA27x/PXA3x driver" + +/* + * UHC: USB Host Controller (OHCI-like) register definitions + */ +#define UHCREV (0x0000) /* UHC HCI Spec Revision */ +#define UHCHCON (0x0004) /* UHC Host Control Register */ +#define UHCCOMS (0x0008) /* UHC Command Status Register */ +#define UHCINTS (0x000C) /* UHC Interrupt Status Register */ +#define UHCINTE (0x0010) /* UHC Interrupt Enable */ +#define UHCINTD (0x0014) /* UHC Interrupt Disable */ +#define UHCHCCA (0x0018) /* UHC Host Controller Comm. Area */ +#define UHCPCED (0x001C) /* UHC Period Current Endpt Descr */ +#define UHCCHED (0x0020) /* UHC Control Head Endpt Descr */ +#define UHCCCED (0x0024) /* UHC Control Current Endpt Descr */ +#define UHCBHED (0x0028) /* UHC Bulk Head Endpt Descr */ +#define UHCBCED (0x002C) /* UHC Bulk Current Endpt Descr */ +#define UHCDHEAD (0x0030) /* UHC Done Head */ +#define UHCFMI (0x0034) /* UHC Frame Interval */ +#define UHCFMR (0x0038) /* UHC Frame Remaining */ +#define UHCFMN (0x003C) /* UHC Frame Number */ +#define UHCPERS (0x0040) /* UHC Periodic Start */ +#define UHCLS (0x0044) /* UHC Low Speed Threshold */ + +#define UHCRHDA (0x0048) /* UHC Root Hub Descriptor A */ +#define UHCRHDA_NOCP (1 << 12) /* No over current protection */ +#define UHCRHDA_OCPM (1 << 11) /* Over Current Protection Mode */ +#define UHCRHDA_POTPGT(x) \ + (((x) & 0xff) << 24) /* Power On To Power Good Time */ + +#define UHCRHDB (0x004C) /* UHC Root Hub Descriptor B */ +#define UHCRHS (0x0050) /* UHC Root Hub Status */ +#define UHCRHPS1 (0x0054) /* UHC Root Hub Port 1 Status */ +#define UHCRHPS2 (0x0058) /* UHC Root Hub Port 2 Status */ +#define UHCRHPS3 (0x005C) /* UHC Root Hub Port 3 Status */ + +#define UHCSTAT (0x0060) /* UHC Status Register */ +#define UHCSTAT_UPS3 (1 << 16) /* USB Power Sense Port3 */ +#define UHCSTAT_SBMAI (1 << 15) /* System Bus Master Abort Interrupt*/ +#define UHCSTAT_SBTAI (1 << 14) /* System Bus Target Abort Interrupt*/ +#define UHCSTAT_UPRI (1 << 13) /* USB Port Resume Interrupt */ +#define UHCSTAT_UPS2 (1 << 12) /* USB Power Sense Port 2 */ +#define UHCSTAT_UPS1 (1 << 11) /* USB Power Sense Port 1 */ +#define UHCSTAT_HTA (1 << 10) /* HCI Target Abort */ +#define UHCSTAT_HBA (1 << 8) /* HCI Buffer Active */ +#define UHCSTAT_RWUE (1 << 7) /* HCI Remote Wake Up Event */ + +#define UHCHR (0x0064) /* UHC Reset Register */ +#define UHCHR_SSEP3 (1 << 11) /* Sleep Standby Enable for Port3 */ +#define UHCHR_SSEP2 (1 << 10) /* Sleep Standby Enable for Port2 */ +#define UHCHR_SSEP1 (1 << 9) /* Sleep Standby Enable for Port1 */ +#define UHCHR_PCPL (1 << 7) /* Power control polarity low */ +#define UHCHR_PSPL (1 << 6) /* Power sense polarity low */ +#define UHCHR_SSE (1 << 5) /* Sleep Standby Enable */ +#define UHCHR_UIT (1 << 4) /* USB Interrupt Test */ +#define UHCHR_SSDC (1 << 3) /* Simulation Scale Down Clock */ +#define UHCHR_CGR (1 << 2) /* Clock Generation Reset */ +#define UHCHR_FHR (1 << 1) /* Force Host Controller Reset */ +#define UHCHR_FSBIR (1 << 0) /* Force System Bus Iface Reset */ + +#define UHCHIE (0x0068) /* UHC Interrupt Enable Register*/ +#define UHCHIE_UPS3IE (1 << 14) /* Power Sense Port3 IntEn */ +#define UHCHIE_UPRIE (1 << 13) /* Port Resume IntEn */ +#define UHCHIE_UPS2IE (1 << 12) /* Power Sense Port2 IntEn */ +#define UHCHIE_UPS1IE (1 << 11) /* Power Sense Port1 IntEn */ +#define UHCHIE_TAIE (1 << 10) /* HCI Interface Transfer Abort + Interrupt Enable*/ +#define UHCHIE_HBAIE (1 << 8) /* HCI Buffer Active IntEn */ +#define UHCHIE_RWIE (1 << 7) /* Remote Wake-up IntEn */ + +#define UHCHIT (0x006C) /* UHC Interrupt Test register */ + +#define PXA_UHC_MAX_PORTNUM 3 + +static struct hc_driver __read_mostly ohci_pxa27x_hc_driver; + +struct pxa27x_ohci { + struct clk *clk; + void __iomem *mmio_base; + struct regulator *vbus[3]; + bool vbus_enabled[3]; +}; + +#define to_pxa27x_ohci(hcd) (struct pxa27x_ohci *)(hcd_to_ohci(hcd)->priv) + +/* + PMM_NPS_MODE -- PMM Non-power switching mode + Ports are powered continuously. + + PMM_GLOBAL_MODE -- PMM global switching mode + All ports are powered at the same time. + + PMM_PERPORT_MODE -- PMM per port switching mode + Ports are powered individually. + */ +static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *pxa_ohci, int mode) +{ + uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA); + uint32_t uhcrhdb = __raw_readl(pxa_ohci->mmio_base + UHCRHDB); + + switch (mode) { + case PMM_NPS_MODE: + uhcrhda |= RH_A_NPS; + break; + case PMM_GLOBAL_MODE: + uhcrhda &= ~(RH_A_NPS | RH_A_PSM); + break; + case PMM_PERPORT_MODE: + uhcrhda &= ~(RH_A_NPS); + uhcrhda |= RH_A_PSM; + + /* Set port power control mask bits, only 3 ports. */ + uhcrhdb |= (0x7<<17); + break; + default: + printk( KERN_ERR + "Invalid mode %d, set to non-power switch mode.\n", + mode ); + + uhcrhda |= RH_A_NPS; + } + + __raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA); + __raw_writel(uhcrhdb, pxa_ohci->mmio_base + UHCRHDB); + return 0; +} + +static int pxa27x_ohci_set_vbus_power(struct pxa27x_ohci *pxa_ohci, + unsigned int port, bool enable) +{ + struct regulator *vbus = pxa_ohci->vbus[port]; + int ret = 0; + + if (IS_ERR_OR_NULL(vbus)) + return 0; + + if (enable && !pxa_ohci->vbus_enabled[port]) + ret = regulator_enable(vbus); + else if (!enable && pxa_ohci->vbus_enabled[port]) + ret = regulator_disable(vbus); + + if (ret < 0) + return ret; + + pxa_ohci->vbus_enabled[port] = enable; + + return 0; +} + +static int pxa27x_ohci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, + u16 wIndex, char *buf, u16 wLength) +{ + struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd); + int ret; + + switch (typeReq) { + case SetPortFeature: + case ClearPortFeature: + if (!wIndex || wIndex > 3) + return -EPIPE; + + if (wValue != USB_PORT_FEAT_POWER) + break; + + ret = pxa27x_ohci_set_vbus_power(pxa_ohci, wIndex - 1, + typeReq == SetPortFeature); + if (ret) + return ret; + break; + } + + return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); +} +/*-------------------------------------------------------------------------*/ + +static inline void pxa27x_setup_hc(struct pxa27x_ohci *pxa_ohci, + struct pxaohci_platform_data *inf) +{ + uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR); + uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA); + + if (inf->flags & ENABLE_PORT1) + uhchr &= ~UHCHR_SSEP1; + + if (inf->flags & ENABLE_PORT2) + uhchr &= ~UHCHR_SSEP2; + + if (inf->flags & ENABLE_PORT3) + uhchr &= ~UHCHR_SSEP3; + + if (inf->flags & POWER_CONTROL_LOW) + uhchr |= UHCHR_PCPL; + + if (inf->flags & POWER_SENSE_LOW) + uhchr |= UHCHR_PSPL; + + if (inf->flags & NO_OC_PROTECTION) + uhcrhda |= UHCRHDA_NOCP; + else + uhcrhda &= ~UHCRHDA_NOCP; + + if (inf->flags & OC_MODE_PERPORT) + uhcrhda |= UHCRHDA_OCPM; + else + uhcrhda &= ~UHCRHDA_OCPM; + + if (inf->power_on_delay) { + uhcrhda &= ~UHCRHDA_POTPGT(0xff); + uhcrhda |= UHCRHDA_POTPGT(inf->power_on_delay / 2); + } + + __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR); + __raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA); +} + +static inline void pxa27x_reset_hc(struct pxa27x_ohci *pxa_ohci) +{ + uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR); + + __raw_writel(uhchr | UHCHR_FHR, pxa_ohci->mmio_base + UHCHR); + udelay(11); + __raw_writel(uhchr & ~UHCHR_FHR, pxa_ohci->mmio_base + UHCHR); +} + +#ifdef CONFIG_PXA27x +extern void pxa27x_clear_otgph(void); +#else +#define pxa27x_clear_otgph() do {} while (0) +#endif + +static int pxa27x_start_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev) +{ + int retval; + struct pxaohci_platform_data *inf; + uint32_t uhchr; + struct usb_hcd *hcd = dev_get_drvdata(dev); + + inf = dev_get_platdata(dev); + + retval = clk_prepare_enable(pxa_ohci->clk); + if (retval) + return retval; + + pxa27x_reset_hc(pxa_ohci); + + uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) | UHCHR_FSBIR; + __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR); + + while (__raw_readl(pxa_ohci->mmio_base + UHCHR) & UHCHR_FSBIR) + cpu_relax(); + + pxa27x_setup_hc(pxa_ohci, inf); + + if (inf->init) + retval = inf->init(dev); + + if (retval < 0) { + clk_disable_unprepare(pxa_ohci->clk); + return retval; + } + + if (cpu_is_pxa3xx()) + pxa3xx_u2d_start_hc(&hcd->self); + + uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) & ~UHCHR_SSE; + __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR); + __raw_writel(UHCHIE_UPRIE | UHCHIE_RWIE, pxa_ohci->mmio_base + UHCHIE); + + /* Clear any OTG Pin Hold */ + pxa27x_clear_otgph(); + return 0; +} + +static void pxa27x_stop_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev) +{ + struct pxaohci_platform_data *inf; + struct usb_hcd *hcd = dev_get_drvdata(dev); + uint32_t uhccoms; + + inf = dev_get_platdata(dev); + + if (cpu_is_pxa3xx()) + pxa3xx_u2d_stop_hc(&hcd->self); + + if (inf->exit) + inf->exit(dev); + + pxa27x_reset_hc(pxa_ohci); + + /* Host Controller Reset */ + uhccoms = __raw_readl(pxa_ohci->mmio_base + UHCCOMS) | 0x01; + __raw_writel(uhccoms, pxa_ohci->mmio_base + UHCCOMS); + udelay(10); + + clk_disable_unprepare(pxa_ohci->clk); +} + +#ifdef CONFIG_OF +static const struct of_device_id pxa_ohci_dt_ids[] = { + { .compatible = "marvell,pxa-ohci" }, + { } +}; + +MODULE_DEVICE_TABLE(of, pxa_ohci_dt_ids); + +static int ohci_pxa_of_init(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct pxaohci_platform_data *pdata; + u32 tmp; + int ret; + + if (!np) + return 0; + + /* Right now device-tree probed devices don't get dma_mask set. + * Since shared usb code relies on it, set it here for now. + * Once we have dma capability bindings this can go away. + */ + ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) + return ret; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + if (of_property_read_bool(np, "marvell,enable-port1")) + pdata->flags |= ENABLE_PORT1; + if (of_property_read_bool(np, "marvell,enable-port2")) + pdata->flags |= ENABLE_PORT2; + if (of_property_read_bool(np, "marvell,enable-port3")) + pdata->flags |= ENABLE_PORT3; + if (of_property_read_bool(np, "marvell,port-sense-low")) + pdata->flags |= POWER_SENSE_LOW; + if (of_property_read_bool(np, "marvell,power-control-low")) + pdata->flags |= POWER_CONTROL_LOW; + if (of_property_read_bool(np, "marvell,no-oc-protection")) + pdata->flags |= NO_OC_PROTECTION; + if (of_property_read_bool(np, "marvell,oc-mode-perport")) + pdata->flags |= OC_MODE_PERPORT; + if (!of_property_read_u32(np, "marvell,power-on-delay", &tmp)) + pdata->power_on_delay = tmp; + if (!of_property_read_u32(np, "marvell,port-mode", &tmp)) + pdata->port_mode = tmp; + if (!of_property_read_u32(np, "marvell,power-budget", &tmp)) + pdata->power_budget = tmp; + + pdev->dev.platform_data = pdata; + + return 0; +} +#else +static int ohci_pxa_of_init(struct platform_device *pdev) +{ + return 0; +} +#endif + +/*-------------------------------------------------------------------------*/ + +/* configure so an HC device and id are always provided */ +/* always called with process context; sleeping is OK */ + + +/** + * ohci_hcd_pxa27x_probe - initialize pxa27x-based HCDs + * @pdev: USB Host controller to probe + * + * Context: task context, might sleep + * + * Allocates basic resources for this USB host controller, and + * then invokes the start() method for the HCD associated with it + * through the hotplug entry's driver_data. + */ +static int ohci_hcd_pxa27x_probe(struct platform_device *pdev) +{ + int retval, irq; + struct usb_hcd *hcd; + struct pxaohci_platform_data *inf; + struct pxa27x_ohci *pxa_ohci; + struct ohci_hcd *ohci; + struct resource *r; + struct clk *usb_clk; + unsigned int i; + + retval = ohci_pxa_of_init(pdev); + if (retval) + return retval; + + inf = dev_get_platdata(&pdev->dev); + + if (!inf) + return -ENODEV; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + pr_err("no resource of IORESOURCE_IRQ"); + return irq; + } + + usb_clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(usb_clk)) + return PTR_ERR(usb_clk); + + hcd = usb_create_hcd(&ohci_pxa27x_hc_driver, &pdev->dev, "pxa27x"); + if (!hcd) + return -ENOMEM; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + hcd->regs = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(hcd->regs)) { + retval = PTR_ERR(hcd->regs); + goto err; + } + hcd->rsrc_start = r->start; + hcd->rsrc_len = resource_size(r); + + /* initialize "struct pxa27x_ohci" */ + pxa_ohci = to_pxa27x_ohci(hcd); + pxa_ohci->clk = usb_clk; + pxa_ohci->mmio_base = (void __iomem *)hcd->regs; + + for (i = 0; i < 3; ++i) { + char name[6]; + + if (!(inf->flags & (ENABLE_PORT1 << i))) + continue; + + sprintf(name, "vbus%u", i + 1); + pxa_ohci->vbus[i] = devm_regulator_get(&pdev->dev, name); + } + + retval = pxa27x_start_hc(pxa_ohci, &pdev->dev); + if (retval < 0) { + pr_debug("pxa27x_start_hc failed"); + goto err; + } + + /* Select Power Management Mode */ + pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode); + + if (inf->power_budget) + hcd->power_budget = inf->power_budget; + + /* The value of NDP in roothub_a is incorrect on this hardware */ + ohci = hcd_to_ohci(hcd); + ohci->num_ports = 3; + + retval = usb_add_hcd(hcd, irq, 0); + if (retval == 0) { + device_wakeup_enable(hcd->self.controller); + return retval; + } + + pxa27x_stop_hc(pxa_ohci, &pdev->dev); + err: + usb_put_hcd(hcd); + return retval; +} + + +/* may be called without controller electrically present */ +/* may be called with controller, bus, and devices active */ + +/** + * ohci_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs + * @pdev: USB Host Controller being removed + * + * Context: task context, might sleep + * + * Reverses the effect of ohci_hcd_pxa27x_probe(), first invoking + * the HCD's stop() method. It is always called from a thread + * context, normally "rmmod", "apmd", or something similar. + */ +static int ohci_hcd_pxa27x_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd); + unsigned int i; + + usb_remove_hcd(hcd); + pxa27x_stop_hc(pxa_ohci, &pdev->dev); + + for (i = 0; i < 3; ++i) + pxa27x_ohci_set_vbus_power(pxa_ohci, i, false); + + usb_put_hcd(hcd); + return 0; +} + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_PM +static int ohci_hcd_pxa27x_drv_suspend(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd); + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + bool do_wakeup = device_may_wakeup(dev); + int ret; + + + if (time_before(jiffies, ohci->next_statechange)) + msleep(5); + ohci->next_statechange = jiffies; + + ret = ohci_suspend(hcd, do_wakeup); + if (ret) + return ret; + + pxa27x_stop_hc(pxa_ohci, dev); + return ret; +} + +static int ohci_hcd_pxa27x_drv_resume(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd); + struct pxaohci_platform_data *inf = dev_get_platdata(dev); + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int status; + + if (time_before(jiffies, ohci->next_statechange)) + msleep(5); + ohci->next_statechange = jiffies; + + status = pxa27x_start_hc(pxa_ohci, dev); + if (status < 0) + return status; + + /* Select Power Management Mode */ + pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode); + + ohci_resume(hcd, false); + return 0; +} + +static const struct dev_pm_ops ohci_hcd_pxa27x_pm_ops = { + .suspend = ohci_hcd_pxa27x_drv_suspend, + .resume = ohci_hcd_pxa27x_drv_resume, +}; +#endif + +static struct platform_driver ohci_hcd_pxa27x_driver = { + .probe = ohci_hcd_pxa27x_probe, + .remove = ohci_hcd_pxa27x_remove, + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .name = "pxa27x-ohci", + .of_match_table = of_match_ptr(pxa_ohci_dt_ids), +#ifdef CONFIG_PM + .pm = &ohci_hcd_pxa27x_pm_ops, +#endif + }, +}; + +static const struct ohci_driver_overrides pxa27x_overrides __initconst = { + .extra_priv_size = sizeof(struct pxa27x_ohci), +}; + +static int __init ohci_pxa27x_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + ohci_init_driver(&ohci_pxa27x_hc_driver, &pxa27x_overrides); + ohci_pxa27x_hc_driver.hub_control = pxa27x_ohci_hub_control; + + return platform_driver_register(&ohci_hcd_pxa27x_driver); +} +module_init(ohci_pxa27x_init); + +static void __exit ohci_pxa27x_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_pxa27x_driver); +} +module_exit(ohci_pxa27x_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pxa27x-ohci"); |