/*
* OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2005 David Brownell
* (C) Copyright 2002 Hewlett-Packard Company
*
* OMAP Bus Glue
*
* Modified for OMAP by Tony Lindgren <tony@atomide.com>
* Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
* and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
*
* This file is licenced under the GPL.
*/
#include <linux/signal.h> /* IRQF_DISABLED */
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/gpio.h>
#include <mach/hardware.h>
#include <asm/io.h>
#include <asm/mach-types.h>
#include <plat/mux.h>
#include <mach/irqs.h>
#include <plat/fpga.h>
#include <plat/usb.h>
/* OMAP-1510 OHCI has its own MMU for DMA */
#define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
#define OMAP1510_LB_CLOCK_DIV 0xfffec10c
#define OMAP1510_LB_MMU_CTL 0xfffec208
#define OMAP1510_LB_MMU_LCK 0xfffec224
#define OMAP1510_LB_MMU_LD_TLB 0xfffec228
#define OMAP1510_LB_MMU_CAM_H 0xfffec22c
#define OMAP1510_LB_MMU_CAM_L 0xfffec230
#define OMAP1510_LB_MMU_RAM_H 0xfffec234
#define OMAP1510_LB_MMU_RAM_L 0xfffec238
#ifndef CONFIG_ARCH_OMAP
#error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
#endif
#ifdef CONFIG_TPS65010
#include <linux/i2c/tps65010.h>
#else
#define LOW 0
#define HIGH 1
#define GPIO1 1
static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
{
return 0;
}
#endif
extern int usb_disabled(void);
extern int ocpi_enable(void);
static struct clk *usb_host_ck;
static struct clk *usb_dc_ck;
static int host_enabled;
static int host_initialized;
static void omap_ohci_clock_power(int on)
{
if (on) {
clk_enable(usb_dc_ck);
clk_enable(usb_host_ck);
/* guesstimate for T5 == 1x 32K clock + APLL lock time */
udelay(100);
} else {
clk_disable(usb_host_ck);
clk_disable(usb_dc_ck);
}
}
/*
* Board specific gang-switched transceiver power on/off.
* NOTE: OSK supplies power from DC, not battery.
*/
static int omap_ohci_transceiver_power(int on)
{
if (on) {
if (machine_is_omap_innovator() && cpu_is_omap1510())
fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
| ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
INNOVATOR_FPGA_CAM_USB_CONTROL);
else if (machine_is_omap_osk())
tps65010_set_gpio_out_value(GPIO1, LOW);
} else {
if (machine_is_omap_innovator() && cpu_is_omap1510())
fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
& ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
INNOVATOR_FPGA_CAM_USB_CONTROL);
else if (machine_is_omap_osk())
tps65010_set_gpio_out_value(GPIO1, HIGH);
}
return 0;
}
#ifdef CONFIG_ARCH_OMAP15XX
/*
* OMAP-1510 specific Local Bus clock on/off
*/
static int omap_1510_local_bus_power(int on)
{
if (on) {
omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
udelay(200);
} else {
omap_writel(0, OMAP1510_LB_MMU_CTL);
}
return 0;
}
/*
* OMAP-1510 specific Local Bus initialization
* NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
* See also arch/mach-omap/memory.h for __virt_to_dma() and
* __dma_to_virt() which need to match with the physical
* Local Bus address below.
*/
static int omap_1510_local_bus_init(void)
{
unsigned int tlb;
unsigned long lbaddr, physaddr;
omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
OMAP1510_LB_CLOCK_DIV);
/* Configure the Local Bus MMU table */
for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
physaddr = tlb * 0x00100000 + PHYS_OFFSET;
omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
OMAP1510_LB_MMU_CAM_L);
omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
}
/* Enable the walking table */
omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
udelay(200);
return 0;
}
#else
#define omap_1510_local_bus_power(x) {}
#define omap_1510_local_bus_init() {}
#endif
#ifdef CONFIG_USB_OTG
static void start_hnp(struct ohci_hcd *ohci)
{
const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1;
unsigned long flags;
u32 l;
otg_start_hnp(ohci->transceiver);
local_irq_save(flags);
ohci->transceiver->state = OTG_STATE_A_SUSPEND;
writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
l = omap_readl(OTG_CTRL);
l &= ~OTG_A_BUSREQ;
omap_writel(l, OTG_CTRL);
local_irq_restore(flags);
}
#endif
/*-------------------------------------------------------------------------*/
static int ohci_omap_init(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
struct omap_usb_config *config = hcd->self.controller->platform_data;
int need_transceiver = (config->otg != 0);
int ret;
dev_dbg(hcd->self.controller, "starting USB Controller\n");
if (config->otg) {
ohci_to_hcd(ohci)->self.otg_port = config->otg;
/* default/minimum OTG power budget: 8 mA */
ohci_to_hcd(ohci)->power_budget = 8;
}
/* boards can use OTG transceivers in non-OTG modes */
need_transceiver = need_transceiver
|| machine_is_omap_h2() || machine_is_omap_h3();
if (cpu_is_omap16xx())
ocpi_enable();
#ifdef CONFIG_USB_OTG
if (need_transceiver) {
ohci->transceiver = otg_get_transceiver();
if (ohci->transceiver) {
int status = otg_set_host(ohci->transceiver,
&ohci_to_hcd(ohci)->self);
dev_dbg(hcd->self.controller, "init %s transceiver, status %d\n",
ohci->transceiver->label, status);
if (status) {
if (ohci->transceiver)
put_device(ohci->transceiver->dev);
return status;
}
} else {
dev_err(hcd->self.controller, "can't find transceiver\n");
return -ENODEV;
}
ohci->start_hnp = start_hnp;
}
#endif
omap_ohci_clock_power(1);
if (cpu_is_omap15xx()) {
omap_1510_local_bus_power(1);
omap_1510_local_bus_init();
}
if ((ret = ohci_init(ohci)) < 0)
return ret;
/* board-specific power switching and overcurrent support */
if (machine_is_omap_osk() || machine_is_omap_innovator()) {
u32 rh = roothub_a (ohci);
/* power switching (ganged by default) */
rh &= ~RH_A_NPS;
/* TPS2045 switch for internal transceiver (port 1) */
if (machine_is_omap_osk()) {
ohci_to_hcd(ohci)->power_budget = 250;
rh &= ~RH_A_NOCP;
/* gpio9 for overcurrent detction */
omap_cfg_reg(W8_1610_GPIO9);
gpio_request(9, "OHCI overcurrent");
gpio_direction_input(9);
/* for paranoia's sake: disable USB.PUEN */
omap_cfg_reg(W4_USB_HIGHZ);
}
ohci_writel(ohci, rh, &ohci->regs->roothub.a);
ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
} else if (machine_is_nokia770()) {
/* We require a self-powered hub, which should have
* plenty of power. */
ohci_to_hcd(ohci)->power_budget = 0;
}
/* FIXME khubd hub requests should manage power switching */
omap_ohci_transceiver_power(1);
/* board init will have already handled HMC and mux setup.
* any external transceiver should already be initialized
* too, so all configured ports use the right signaling now.
*/
return 0;
}
static void ohci_omap_stop(struct usb_hcd *hcd)
{
dev_dbg(hcd->self.controller, "stopping USB Controller\n");
ohci_stop(hcd);
omap_ohci_clock_power(0);
}
/*-------------------------------------------------------------------------*/
/**
* usb_hcd_omap_probe - initialize OMAP-based HCDs
* Context: !in_interrupt()
*
* 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 usb_hcd_omap_probe (const struct hc_driver *driver,
struct platform_device *pdev)
{
int retval, irq;
struct usb_hcd *hcd = 0;
struct ohci_hcd *ohci;
if (pdev->num_resources != 2) {
printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
pdev->num_resources);
return -ENODEV;
}
if (pdev->resource[0].flags != IORESOURCE_MEM
|| pdev->resource[1].flags != IORESOURCE_IRQ) {
printk(KERN_ERR "hcd probe: invalid resource type\n");
return -ENODEV;
}
usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
if (IS_ERR(usb_host_ck))
return PTR_ERR(usb_host_ck);
if (!cpu_is_omap15xx())
usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
else
usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
if (IS_ERR(usb_dc_ck)) {
clk_put(usb_host_ck);
return PTR_ERR(usb_dc_ck);
}
hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
goto err0;
}
hcd->rsrc_start = pdev->resource[0].start;
hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
dev_dbg(&pdev->dev, "request_mem_region failed\n");
retval = -EBUSY;
goto err1;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
retval = -ENOMEM;
goto err2;
}
ohci = hcd_to_ohci(hcd);
ohci_hcd_init(ohci);
host_initialized = 0;
host_enabled = 1;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
retval = -ENXIO;
goto err3;
}
retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
if (retval)
goto err3;
host_initialized = 1;
if (!host_enabled)
omap_ohci_clock_power(0);
return 0;
err3:
iounmap(hcd->regs);
err2:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
usb_put_hcd(hcd);
err0:
clk_put(usb_dc_ck);
clk_put(usb_host_ck);
return retval;
}
/* may be called with controller, bus, and devices active */
/**
* usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
* @dev: USB Host Controller being removed
* Context: !in_interrupt()
*
* Reverses the effect of usb_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 inline void
usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
usb_remove_hcd(hcd);
if (ohci->transceiver) {
(void) otg_set_host(ohci->transceiver, 0);
put_device(ohci->transceiver->dev);
}
if (machine_is_omap_osk())
gpio_free(9);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
clk_put(usb_dc_ck);
clk_put(usb_host_ck);
}
/*-------------------------------------------------------------------------*/
static int
ohci_omap_start (struct usb_hcd *hcd)
{
struct omap_usb_config *config;
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int ret;
if (!host_enabled)
return 0;
config = hcd->self.controller->platform_data;
if (config->otg || config->rwc) {
ohci->hc_control = OHCI_CTRL_RWC;
writel(OHCI_CTRL_RWC, &ohci->regs->control);
}
if ((ret = ohci_run (ohci)) < 0) {
dev_err(hcd->self.controller, "can't start\n");
ohci_stop (hcd);
return ret;
}
return 0;
}
/*-------------------------------------------------------------------------*/
static const struct hc_driver ohci_omap_hc_driver = {
.description = hcd_name,
.product_desc = "OMAP OHCI",
.hcd_priv_size = sizeof(struct ohci_hcd),
/*
* generic hardware linkage
*/
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.reset = ohci_omap_init,
.start = ohci_omap_start,
.stop = ohci_omap_stop,
.shutdown = ohci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ohci_get_frame,
/*
* root hub support
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
/*-------------------------------------------------------------------------*/
static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
{
return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
}
static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
usb_hcd_omap_remove(hcd, dev);
platform_set_drvdata(dev, NULL);
return 0;
}
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_PM
static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
{
struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
omap_ohci_clock_power(0);
ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
return 0;
}
static int ohci_omap_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
omap_ohci_clock_power(1);
ohci_finish_controller_resume(hcd);
return 0;
}
#endif
/*-------------------------------------------------------------------------*/
/*
* Driver definition to register with the OMAP bus
*/
static struct platform_driver ohci_hcd_omap_driver = {
.probe = ohci_hcd_omap_drv_probe,
.remove = ohci_hcd_omap_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
#ifdef CONFIG_PM
.suspend = ohci_omap_suspend,
.resume = ohci_omap_resume,
#endif
.driver = {
.owner = THIS_MODULE,
.name = "ohci",
},
};
MODULE_ALIAS("platform:ohci");
