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OpenCloudOS-Kernel/arch/arm/plat-omap/usb.c

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/*
* arch/arm/plat-omap/usb.c -- platform level USB initialization
*
* Copyright (C) 2004 Texas Instruments, Inc.
*
* 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.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/usb/otg.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/hardware.h>
#include <asm/arch/mux.h>
#include <asm/arch/usb.h>
#include <asm/arch/board.h>
/* These routines should handle the standard chip-specific modes
* for usb0/1/2 ports, covering basic mux and transceiver setup.
* Call omap_usb_init() once, from INIT_MACHINE().
*
* Some board-*.c files will need to set up additional mux options,
* like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
*/
/* TESTED ON:
* - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
* - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
* - 5912 OSK UDC, with *nonstandard* A-to-A cable
* - 1510 Innovator UDC with bundled usb0 cable
* - 1510 Innovator OHCI with bundled usb1/usb2 cable
* - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
* - 1710 custom development board using alternate pin group
* - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
*/
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_ARCH_OMAP_OTG
static struct otg_transceiver *xceiv;
/**
* otg_get_transceiver - find the (single) OTG transceiver driver
*
* Returns the transceiver driver, after getting a refcount to it; or
* null if there is no such transceiver. The caller is responsible for
* releasing that count.
*/
struct otg_transceiver *otg_get_transceiver(void)
{
if (xceiv)
get_device(xceiv->dev);
return xceiv;
}
EXPORT_SYMBOL(otg_get_transceiver);
int otg_set_transceiver(struct otg_transceiver *x)
{
if (xceiv && x)
return -EBUSY;
xceiv = x;
return 0;
}
EXPORT_SYMBOL(otg_set_transceiver);
#endif
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_ARCH_OMAP_OTG) || defined(CONFIG_ARCH_OMAP15XX)
static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
{
u32 syscon1 = 0;
if (nwires == 0) {
if (!cpu_is_omap15xx()) {
/* pulldown D+/D- */
USB_TRANSCEIVER_CTRL_REG &= ~(3 << 1);
}
return 0;
}
if (is_device)
omap_cfg_reg(W4_USB_PUEN);
/* internal transceiver */
if (nwires == 2) {
// omap_cfg_reg(P9_USB_DP);
// omap_cfg_reg(R8_USB_DM);
if (cpu_is_omap15xx()) {
/* This works on 1510-Innovator */
return 0;
}
/* NOTES:
* - peripheral should configure VBUS detection!
* - only peripherals may use the internal D+/D- pulldowns
* - OTG support on this port not yet written
*/
USB_TRANSCEIVER_CTRL_REG &= ~(7 << 4);
if (!is_device)
USB_TRANSCEIVER_CTRL_REG |= (3 << 1);
return 3 << 16;
}
/* alternate pin config, external transceiver */
if (cpu_is_omap15xx()) {
printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
return 0;
}
omap_cfg_reg(V6_USB0_TXD);
omap_cfg_reg(W9_USB0_TXEN);
omap_cfg_reg(W5_USB0_SE0);
/* NOTE: SPEED and SUSP aren't configured here */
if (nwires != 3)
omap_cfg_reg(Y5_USB0_RCV);
if (nwires != 6)
USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
switch (nwires) {
case 3:
syscon1 = 2;
break;
case 4:
syscon1 = 1;
break;
case 6:
syscon1 = 3;
omap_cfg_reg(AA9_USB0_VP);
omap_cfg_reg(R9_USB0_VM);
USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
break;
default:
printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
0, nwires);
}
return syscon1 << 16;
}
static u32 __init omap_usb1_init(unsigned nwires)
{
u32 syscon1 = 0;
if (nwires != 6 && !cpu_is_omap15xx())
USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB1_UNI_R;
if (nwires == 0)
return 0;
/* external transceiver */
omap_cfg_reg(USB1_TXD);
omap_cfg_reg(USB1_TXEN);
if (cpu_is_omap15xx()) {
omap_cfg_reg(USB1_SEO);
omap_cfg_reg(USB1_SPEED);
// SUSP
} else if (cpu_is_omap1610() || cpu_is_omap5912()) {
omap_cfg_reg(W13_1610_USB1_SE0);
omap_cfg_reg(R13_1610_USB1_SPEED);
// SUSP
} else if (cpu_is_omap1710()) {
omap_cfg_reg(R13_1710_USB1_SE0);
// SUSP
} else {
pr_debug("usb unrecognized\n");
}
if (nwires != 3)
omap_cfg_reg(USB1_RCV);
switch (nwires) {
case 3:
syscon1 = 2;
break;
case 4:
syscon1 = 1;
break;
case 6:
syscon1 = 3;
omap_cfg_reg(USB1_VP);
omap_cfg_reg(USB1_VM);
if (!cpu_is_omap15xx())
USB_TRANSCEIVER_CTRL_REG |= CONF_USB1_UNI_R;
break;
default:
printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
1, nwires);
}
return syscon1 << 20;
}
static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
{
u32 syscon1 = 0;
/* NOTE erratum: must leave USB2_UNI_R set if usb0 in use */
if (alt_pingroup || nwires == 0)
return 0;
if (nwires != 6 && !cpu_is_omap15xx())
USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
/* external transceiver */
if (cpu_is_omap15xx()) {
omap_cfg_reg(USB2_TXD);
omap_cfg_reg(USB2_TXEN);
omap_cfg_reg(USB2_SEO);
if (nwires != 3)
omap_cfg_reg(USB2_RCV);
/* there is no USB2_SPEED */
} else if (cpu_is_omap16xx()) {
omap_cfg_reg(V6_USB2_TXD);
omap_cfg_reg(W9_USB2_TXEN);
omap_cfg_reg(W5_USB2_SE0);
if (nwires != 3)
omap_cfg_reg(Y5_USB2_RCV);
// FIXME omap_cfg_reg(USB2_SPEED);
} else {
pr_debug("usb unrecognized\n");
}
// omap_cfg_reg(USB2_SUSP);
switch (nwires) {
case 3:
syscon1 = 2;
break;
case 4:
syscon1 = 1;
break;
case 6:
syscon1 = 3;
if (cpu_is_omap15xx()) {
omap_cfg_reg(USB2_VP);
omap_cfg_reg(USB2_VM);
} else {
omap_cfg_reg(AA9_USB2_VP);
omap_cfg_reg(R9_USB2_VM);
USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
}
break;
default:
printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
2, nwires);
}
return syscon1 << 24;
}
#endif
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_USB_GADGET_OMAP) || \
defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) || \
(defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG))
static void usb_release(struct device *dev)
{
/* normally not freed */
}
#endif
#ifdef CONFIG_USB_GADGET_OMAP
static struct resource udc_resources[] = {
/* order is significant! */
{ /* registers */
.start = UDC_BASE,
.end = UDC_BASE + 0xff,
.flags = IORESOURCE_MEM,
}, { /* general IRQ */
.start = IH2_BASE + 20,
.flags = IORESOURCE_IRQ,
}, { /* PIO IRQ */
.start = IH2_BASE + 30,
.flags = IORESOURCE_IRQ,
}, { /* SOF IRQ */
.start = IH2_BASE + 29,
.flags = IORESOURCE_IRQ,
},
};
static u64 udc_dmamask = ~(u32)0;
static struct platform_device udc_device = {
.name = "omap_udc",
.id = -1,
.dev = {
.release = usb_release,
.dma_mask = &udc_dmamask,
.coherent_dma_mask = 0xffffffff,
},
.num_resources = ARRAY_SIZE(udc_resources),
.resource = udc_resources,
};
#endif
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
/* The dmamask must be set for OHCI to work */
static u64 ohci_dmamask = ~(u32)0;
static struct resource ohci_resources[] = {
{
.start = OMAP_OHCI_BASE,
.end = OMAP_OHCI_BASE + 4096 - 1,
.flags = IORESOURCE_MEM,
},
{
.start = INT_USB_HHC_1,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device ohci_device = {
.name = "ohci",
.id = -1,
.dev = {
.release = usb_release,
.dma_mask = &ohci_dmamask,
.coherent_dma_mask = 0xffffffff,
},
.num_resources = ARRAY_SIZE(ohci_resources),
.resource = ohci_resources,
};
#endif
#if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
static struct resource otg_resources[] = {
/* order is significant! */
{
.start = OTG_BASE,
.end = OTG_BASE + 0xff,
.flags = IORESOURCE_MEM,
}, {
.start = IH2_BASE + 8,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device otg_device = {
.name = "omap_otg",
.id = -1,
.dev = {
.release = usb_release,
},
.num_resources = ARRAY_SIZE(otg_resources),
.resource = otg_resources,
};
#endif
/*-------------------------------------------------------------------------*/
#define ULPD_CLOCK_CTRL_REG __REG16(ULPD_CLOCK_CTRL)
#define ULPD_SOFT_REQ_REG __REG16(ULPD_SOFT_REQ)
// FIXME correct answer depends on hmc_mode,
// as does any nonzero value for config->otg port number
#ifdef CONFIG_USB_GADGET_OMAP
#define is_usb0_device(config) 1
#else
#define is_usb0_device(config) 0
#endif
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_ARCH_OMAP_OTG
void __init
omap_otg_init(struct omap_usb_config *config)
{
u32 syscon = OTG_SYSCON_1_REG & 0xffff;
int status;
int alt_pingroup = 0;
/* NOTE: no bus or clock setup (yet?) */
syscon = OTG_SYSCON_1_REG & 0xffff;
if (!(syscon & OTG_RESET_DONE))
pr_debug("USB resets not complete?\n");
// OTG_IRQ_EN_REG = 0;
/* pin muxing and transceiver pinouts */
if (config->pins[0] > 2) /* alt pingroup 2 */
alt_pingroup = 1;
syscon |= omap_usb0_init(config->pins[0], is_usb0_device(config));
syscon |= omap_usb1_init(config->pins[1]);
syscon |= omap_usb2_init(config->pins[2], alt_pingroup);
pr_debug("OTG_SYSCON_1_REG = %08x\n", syscon);
OTG_SYSCON_1_REG = syscon;
syscon = config->hmc_mode;
syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
#ifdef CONFIG_USB_OTG
if (config->otg)
syscon |= OTG_EN;
#endif
pr_debug("USB_TRANSCEIVER_CTRL_REG = %03x\n", USB_TRANSCEIVER_CTRL_REG);
pr_debug("OTG_SYSCON_2_REG = %08x\n", syscon);
OTG_SYSCON_2_REG = syscon;
printk("USB: hmc %d", config->hmc_mode);
if (alt_pingroup)
printk(", usb2 alt %d wires", config->pins[2]);
else if (config->pins[0])
printk(", usb0 %d wires%s", config->pins[0],
is_usb0_device(config) ? " (dev)" : "");
if (config->pins[1])
printk(", usb1 %d wires", config->pins[1]);
if (!alt_pingroup && config->pins[2])
printk(", usb2 %d wires", config->pins[2]);
if (config->otg)
printk(", Mini-AB on usb%d", config->otg - 1);
printk("\n");
/* leave USB clocks/controllers off until needed */
ULPD_SOFT_REQ_REG &= ~SOFT_USB_CLK_REQ;
ULPD_CLOCK_CTRL_REG &= ~USB_MCLK_EN;
ULPD_CLOCK_CTRL_REG |= DIS_USB_PVCI_CLK;
syscon = OTG_SYSCON_1_REG;
syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
#ifdef CONFIG_USB_GADGET_OMAP
if (config->otg || config->register_dev) {
syscon &= ~DEV_IDLE_EN;
udc_device.dev.platform_data = config;
/* FIXME patch IRQ numbers for omap730 */
status = platform_device_register(&udc_device);
if (status)
pr_debug("can't register UDC device, %d\n", status);
}
#endif
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
if (config->otg || config->register_host) {
syscon &= ~HST_IDLE_EN;
ohci_device.dev.platform_data = config;
if (cpu_is_omap730())
ohci_resources[1].start = INT_730_USB_HHC_1;
status = platform_device_register(&ohci_device);
if (status)
pr_debug("can't register OHCI device, %d\n", status);
}
#endif
#ifdef CONFIG_USB_OTG
if (config->otg) {
syscon &= ~OTG_IDLE_EN;
otg_device.dev.platform_data = config;
if (cpu_is_omap730())
otg_resources[1].start = INT_730_USB_OTG;
status = platform_device_register(&otg_device);
if (status)
pr_debug("can't register OTG device, %d\n", status);
}
#endif
pr_debug("OTG_SYSCON_1_REG = %08x\n", syscon);
OTG_SYSCON_1_REG = syscon;
status = 0;
}
#else
static inline void omap_otg_init(struct omap_usb_config *config) {}
#endif
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_ARCH_OMAP15XX
#define ULPD_DPLL_CTRL_REG __REG16(ULPD_DPLL_CTRL)
#define DPLL_IOB (1 << 13)
#define DPLL_PLL_ENABLE (1 << 4)
#define DPLL_LOCK (1 << 0)
#define ULPD_APLL_CTRL_REG __REG16(ULPD_APLL_CTRL)
#define APLL_NDPLL_SWITCH (1 << 0)
static void __init omap_1510_usb_init(struct omap_usb_config *config)
{
unsigned int val;
omap_usb0_init(config->pins[0], is_usb0_device(config));
omap_usb1_init(config->pins[1]);
omap_usb2_init(config->pins[2], 0);
val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
val |= (config->hmc_mode << 1);
omap_writel(val, MOD_CONF_CTRL_0);
printk("USB: hmc %d", config->hmc_mode);
if (config->pins[0])
printk(", usb0 %d wires%s", config->pins[0],
is_usb0_device(config) ? " (dev)" : "");
if (config->pins[1])
printk(", usb1 %d wires", config->pins[1]);
if (config->pins[2])
printk(", usb2 %d wires", config->pins[2]);
printk("\n");
/* use DPLL for 48 MHz function clock */
pr_debug("APLL %04x DPLL %04x REQ %04x\n", ULPD_APLL_CTRL_REG,
ULPD_DPLL_CTRL_REG, ULPD_SOFT_REQ_REG);
ULPD_APLL_CTRL_REG &= ~APLL_NDPLL_SWITCH;
ULPD_DPLL_CTRL_REG |= DPLL_IOB | DPLL_PLL_ENABLE;
ULPD_SOFT_REQ_REG |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
while (!(ULPD_DPLL_CTRL_REG & DPLL_LOCK))
cpu_relax();
#ifdef CONFIG_USB_GADGET_OMAP
if (config->register_dev) {
int status;
udc_device.dev.platform_data = config;
status = platform_device_register(&udc_device);
if (status)
pr_debug("can't register UDC device, %d\n", status);
/* udc driver gates 48MHz by D+ pullup */
}
#endif
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
if (config->register_host) {
int status;
ohci_device.dev.platform_data = config;
status = platform_device_register(&ohci_device);
if (status)
pr_debug("can't register OHCI device, %d\n", status);
/* hcd explicitly gates 48MHz */
}
#endif
}
#else
static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
#endif
/*-------------------------------------------------------------------------*/
static struct omap_usb_config platform_data;
static int __init
omap_usb_init(void)
{
const struct omap_usb_config *config;
config = omap_get_config(OMAP_TAG_USB, struct omap_usb_config);
if (config == NULL) {
printk(KERN_ERR "USB: No board-specific "
"platform config found\n");
return -ENODEV;
}
platform_data = *config;
if (cpu_is_omap730() || cpu_is_omap16xx())
omap_otg_init(&platform_data);
else if (cpu_is_omap15xx())
omap_1510_usb_init(&platform_data);
else {
printk(KERN_ERR "USB: No init for your chip yet\n");
return -ENODEV;
}
return 0;
}
subsys_initcall(omap_usb_init);
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