// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Platform level USB initialization for FS USB OTG controller on omap1
*
* Copyright (C) 2004 Texas Instruments, Inc.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-map-ops.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/soc/ti/omap1-io.h>
#include <asm/irq.h>
#include "hardware.h"
#include "mux.h"
#include "usb.h"
#include "common.h"
/* These routines should handle the standard chip-specific modes
* for usb0/1/2 ports, covering basic mux and transceiver setup.
*
* 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
*/
#define INT_USB_IRQ_GEN IH2_BASE + 20
#define INT_USB_IRQ_NISO IH2_BASE + 30
#define INT_USB_IRQ_ISO IH2_BASE + 29
#define INT_USB_IRQ_HGEN INT_USB_HHC_1
#define INT_USB_IRQ_OTG IH2_BASE + 8
#ifdef CONFIG_ARCH_OMAP_OTG
static void __init
omap_otg_init(struct omap_usb_config *config)
{
u32 syscon;
int alt_pingroup = 0;
u16 w;
/* NOTE: no bus or clock setup (yet?) */
syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
if (!(syscon & OTG_RESET_DONE))
pr_debug("USB resets not complete?\n");
//omap_writew(0, OTG_IRQ_EN);
/* pin muxing and transceiver pinouts */
if (config->pins[0] > 2) /* alt pingroup 2 */
alt_pingroup = 1;
syscon |= config->usb0_init(config->pins[0], is_usb0_device(config));
syscon |= config->usb1_init(config->pins[1]);
syscon |= config->usb2_init(config->pins[2], alt_pingroup);
pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
omap_writel(syscon, OTG_SYSCON_1);
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 = %03x\n",
omap_readl(USB_TRANSCEIVER_CTRL));
pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
omap_writel(syscon, OTG_SYSCON_2);
printk("USB: hmc %d", config->hmc_mode);
if (!alt_pingroup)
pr_cont(", usb2 alt %d wires", config->pins[2]);
else if (config->pins[0])
pr_cont(", usb0 %d wires%s", config->pins[0],
is_usb0_device(config) ? " (dev)" : "");
if (config->pins[1])
pr_cont(", usb1 %d wires", config->pins[1]);
if (!alt_pingroup && config->pins[2])
pr_cont(", usb2 %d wires", config->pins[2]);
if (config->otg)
pr_cont(", Mini-AB on usb%d", config->otg - 1);
pr_cont("\n");
/* leave USB clocks/controllers off until needed */
w = omap_readw(ULPD_SOFT_REQ);
w &= ~SOFT_USB_CLK_REQ;
omap_writew(w, ULPD_SOFT_REQ);
w = omap_readw(ULPD_CLOCK_CTRL);
w &= ~USB_MCLK_EN;
w |= DIS_USB_PVCI_CLK;
omap_writew(w, ULPD_CLOCK_CTRL);
syscon = omap_readl(OTG_SYSCON_1);
syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
#if IS_ENABLED(CONFIG_USB_OMAP)
if (config->otg || config->register_dev) {
struct platform_device *udc_device = config->udc_device;
int status;
syscon &= ~DEV_IDLE_EN;
udc_device->dev.platform_data = config;
status = platform_device_register(udc_device);
if (status)
pr_debug("can't register UDC device, %d\n", status);
}
#endif
#if IS_ENABLED(CONFIG_USB_OHCI_HCD)
if (config->otg || config->register_host) {
struct platform_device *ohci_device = config->ohci_device;
int status;
syscon &= ~HST_IDLE_EN;
ohci_device->dev.platform_data = config;
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) {
struct platform_device *otg_device = config->otg_device;
int status;
syscon &= ~OTG_IDLE_EN;
otg_device->dev.platform_data = config;
status = platform_device_register(otg_device);
if (status)
pr_debug("can't register OTG device, %d\n", status);
}
#endif
pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
omap_writel(syscon, OTG_SYSCON_1);
}
#else
static void omap_otg_init(struct omap_usb_config *config) {}
#endif
#if IS_ENABLED(CONFIG_USB_OMAP)
static struct resource udc_resources[] = {
/* order is significant! */
{ /* registers */
.start = UDC_BASE,
.end = UDC_BASE + 0xff,
.flags = IORESOURCE_MEM,
}, { /* general IRQ */
.start = INT_USB_IRQ_GEN,
.flags = IORESOURCE_IRQ,
}, { /* PIO IRQ */
.start = INT_USB_IRQ_NISO,
.flags = IORESOURCE_IRQ,
}, { /* SOF IRQ */
.start = INT_USB_IRQ_ISO,
.flags = IORESOURCE_IRQ,
},
};
static u64 udc_dmamask = ~(u32)0;
static struct platform_device udc_device = {
.name = "omap_udc",
.id = -1,
.dev = {
.dma_mask = &udc_dmamask,
.coherent_dma_mask = 0xffffffff,
},
.num_resources = ARRAY_SIZE(udc_resources),
.resource = udc_resources,
};
static inline void udc_device_init(struct omap_usb_config *pdata)
{
pdata->udc_device = &udc_device;
}
#else
static inline void udc_device_init(struct omap_usb_config *pdata)
{
}
#endif
/* 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 + 0xff,
.flags = IORESOURCE_MEM,
},
{
.start = INT_USB_IRQ_HGEN,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device ohci_device = {
.name = "ohci",
.id = -1,
.dev = {
.dma_mask = &ohci_dmamask,
.coherent_dma_mask = 0xffffffff,
},
.num_resources = ARRAY_SIZE(ohci_resources),
.resource = ohci_resources,
};
static inline void ohci_device_init(struct omap_usb_config *pdata)
{
if (!IS_ENABLED(CONFIG_USB_OHCI_HCD))
return;
pdata->ohci_device = &ohci_device;
pdata->ocpi_enable = &ocpi_enable;
}
#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 = INT_USB_IRQ_OTG,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device otg_device = {
.name = "omap_otg",
.id = -1,
.num_resources = ARRAY_SIZE(otg_resources),
.resource = otg_resources,
};
static inline void otg_device_init(struct omap_usb_config *pdata)
{
pdata->otg_device = &otg_device;
}
#else
static inline void otg_device_init(struct omap_usb_config *pdata)
{
}
#endif
static u32 __init omap1_usb0_init(unsigned nwires, unsigned is_device)
{
u32 syscon1 = 0;
if (nwires == 0) {
if (!cpu_is_omap15xx()) {
u32 l;
/* pulldown D+/D- */
l = omap_readl(USB_TRANSCEIVER_CTRL);
l &= ~(3 << 1);
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
return 0;
}
if (is_device) {
omap_cfg_reg(W4_USB_PUEN);
}
if (nwires == 2) {
u32 l;
// 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
*/
l = omap_readl(USB_TRANSCEIVER_CTRL);
l &= ~(7 << 4);
if (!is_device)
l |= (3 << 1);
omap_writel(l, USB_TRANSCEIVER_CTRL);
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);
if (nwires != 3)
omap_cfg_reg(Y5_USB0_RCV);
/* NOTE: SPEED and SUSP aren't configured here. OTG hosts
* may be able to use I2C requests to set those bits along
* with VBUS switching and overcurrent detection.
*/
if (nwires != 6) {
u32 l;
l = omap_readl(USB_TRANSCEIVER_CTRL);
l &= ~CONF_USB2_UNI_R;
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
switch (nwires) {
case 3:
syscon1 = 2;
break;
case 4:
syscon1 = 1;
break;
case 6:
syscon1 = 3;
{
u32 l;
omap_cfg_reg(AA9_USB0_VP);
omap_cfg_reg(R9_USB0_VM);
l = omap_readl(USB_TRANSCEIVER_CTRL);
l |= CONF_USB2_UNI_R;
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
break;
default:
printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
0, nwires);
}
return syscon1 << 16;
}
static u32 __init omap1_usb1_init(unsigned nwires)
{
u32 syscon1 = 0;
if (!cpu_is_omap15xx() && nwires != 6) {
u32 l;
l = omap_readl(USB_TRANSCEIVER_CTRL);
l &= ~CONF_USB1_UNI_R;
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
if (nwires == 0)
return 0;
/* external transceiver */
omap_cfg_reg(USB1_TXD);
omap_cfg_reg(USB1_TXEN);
if (nwires != 3)
omap_cfg_reg(USB1_RCV);
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%d cpu unrecognized\n", 1);
return 0;
}
switch (nwires) {
case 2:
goto bad;
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()) {
u32 l;
l = omap_readl(USB_TRANSCEIVER_CTRL);
l |= CONF_USB1_UNI_R;
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
break;
default:
bad:
printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
1, nwires);
}
return syscon1 << 20;
}
static u32 __init omap1_usb2_init(unsigned nwires, unsigned alt_pingroup)
{
u32 syscon1 = 0;
/* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
if (alt_pingroup || nwires == 0)
return 0;
if (!cpu_is_omap15xx() && nwires != 6) {
u32 l;
l = omap_readl(USB_TRANSCEIVER_CTRL);
l &= ~CONF_USB2_UNI_R;
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
/* 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%d cpu unrecognized\n", 1);
return 0;
}
// omap_cfg_reg(USB2_SUSP);
switch (nwires) {
case 2:
goto bad;
case 3:
syscon1 = 2;
break;
case 4:
syscon1 = 1;
break;
case 5:
goto bad;
case 6:
syscon1 = 3;
if (cpu_is_omap15xx()) {
omap_cfg_reg(USB2_VP);
omap_cfg_reg(USB2_VM);
} else {
u32 l;
omap_cfg_reg(AA9_USB2_VP);
omap_cfg_reg(R9_USB2_VM);
l = omap_readl(USB_TRANSCEIVER_CTRL);
l |= CONF_USB2_UNI_R;
omap_writel(l, USB_TRANSCEIVER_CTRL);
}
break;
default:
bad:
printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
2, nwires);
}
return syscon1 << 24;
}
#ifdef CONFIG_ARCH_OMAP15XX
/* 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
/*
* Bus address is physical address, except for OMAP-1510 Local Bus.
* OMAP-1510 bus address is translated into a Local Bus address if the
* OMAP bus type is lbus.
*/
#define OMAP1510_LB_OFFSET UL(0x30000000)
/*
* 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;
}
static void omap_1510_local_bus_reset(void)
{
omap_1510_local_bus_power(1);
omap_1510_local_bus_init();
}
/* ULPD_DPLL_CTRL */
#define DPLL_IOB (1 << 13)
#define DPLL_PLL_ENABLE (1 << 4)
#define DPLL_LOCK (1 << 0)
/* ULPD_APLL_CTRL */
#define APLL_NDPLL_SWITCH (1 << 0)
static void __init omap_1510_usb_init(struct omap_usb_config *config)
{
unsigned int val;
u16 w;
config->usb0_init(config->pins[0], is_usb0_device(config));
config->usb1_init(config->pins[1]);
config->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])
pr_cont(", usb0 %d wires%s", config->pins[0],
is_usb0_device(config) ? " (dev)" : "");
if (config->pins[1])
pr_cont(", usb1 %d wires", config->pins[1]);
if (config->pins[2])
pr_cont(", usb2 %d wires", config->pins[2]);
pr_cont("\n");
/* use DPLL for 48 MHz function clock */
pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
w = omap_readw(ULPD_APLL_CTRL);
w &= ~APLL_NDPLL_SWITCH;
omap_writew(w, ULPD_APLL_CTRL);
w = omap_readw(ULPD_DPLL_CTRL);
w |= DPLL_IOB | DPLL_PLL_ENABLE;
omap_writew(w, ULPD_DPLL_CTRL);
w = omap_readw(ULPD_SOFT_REQ);
w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
omap_writew(w, ULPD_SOFT_REQ);
while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
cpu_relax();
#if IS_ENABLED(CONFIG_USB_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 (IS_ENABLED(CONFIG_USB_OHCI_HCD) && config->register_host) {
int status;
ohci_device.dev.platform_data = config;
dma_direct_set_offset(&ohci_device.dev, PHYS_OFFSET,
OMAP1510_LB_OFFSET, (u64)-1);
status = platform_device_register(&ohci_device);
if (status)
pr_debug("can't register OHCI device, %d\n", status);
/* hcd explicitly gates 48MHz */
config->lb_reset = omap_1510_local_bus_reset;
}
}
#else
static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
#endif
void __init omap1_usb_init(struct omap_usb_config *_pdata)
{
struct omap_usb_config *pdata;
pdata = kmemdup(_pdata, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return;
pdata->usb0_init = omap1_usb0_init;
pdata->usb1_init = omap1_usb1_init;
pdata->usb2_init = omap1_usb2_init;
udc_device_init(pdata);
ohci_device_init(pdata);
otg_device_init(pdata);
if (cpu_is_omap16xx())
omap_otg_init(pdata);
else if (cpu_is_omap15xx())
omap_1510_usb_init(pdata);
else
printk(KERN_ERR "USB: No init for your chip yet\n");
}
Codebase Browser
linux