360 lines
7.7 KiB
C
360 lines
7.7 KiB
C
/*
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* Platform level USB initialization for FS USB OTG controller on omap1 and 24xx
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*
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* Copyright (C) 2004 Texas Instruments, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <asm/irq.h>
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#include <plat/usb.h>
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#include <plat/board.h>
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#include "control.h"
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#include "mux.h"
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#define INT_USB_IRQ_GEN INT_24XX_USB_IRQ_GEN
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#define INT_USB_IRQ_NISO INT_24XX_USB_IRQ_NISO
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#define INT_USB_IRQ_ISO INT_24XX_USB_IRQ_ISO
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#define INT_USB_IRQ_HGEN INT_24XX_USB_IRQ_HGEN
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#define INT_USB_IRQ_OTG INT_24XX_USB_IRQ_OTG
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#if defined(CONFIG_ARCH_OMAP2)
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#ifdef CONFIG_USB_GADGET_OMAP
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static struct resource udc_resources[] = {
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/* order is significant! */
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{ /* registers */
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.start = UDC_BASE,
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.end = UDC_BASE + 0xff,
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.flags = IORESOURCE_MEM,
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}, { /* general IRQ */
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.start = INT_USB_IRQ_GEN,
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.flags = IORESOURCE_IRQ,
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}, { /* PIO IRQ */
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.start = INT_USB_IRQ_NISO,
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.flags = IORESOURCE_IRQ,
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}, { /* SOF IRQ */
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.start = INT_USB_IRQ_ISO,
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 udc_dmamask = ~(u32)0;
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static struct platform_device udc_device = {
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.name = "omap_udc",
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.id = -1,
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.dev = {
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.dma_mask = &udc_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(udc_resources),
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.resource = udc_resources,
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};
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static inline void udc_device_init(struct omap_usb_config *pdata)
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{
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pdata->udc_device = &udc_device;
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}
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#else
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static inline void udc_device_init(struct omap_usb_config *pdata)
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{
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}
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#endif
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#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
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/* The dmamask must be set for OHCI to work */
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static u64 ohci_dmamask = ~(u32)0;
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static struct resource ohci_resources[] = {
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{
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.start = OMAP_OHCI_BASE,
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.end = OMAP_OHCI_BASE + 0xff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = INT_USB_IRQ_HGEN,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device ohci_device = {
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.name = "ohci",
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.id = -1,
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.dev = {
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.dma_mask = &ohci_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(ohci_resources),
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.resource = ohci_resources,
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};
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static inline void ohci_device_init(struct omap_usb_config *pdata)
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{
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pdata->ohci_device = &ohci_device;
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}
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#else
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static inline void ohci_device_init(struct omap_usb_config *pdata)
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{
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}
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#endif
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#if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
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static struct resource otg_resources[] = {
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/* order is significant! */
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{
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.start = OTG_BASE,
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.end = OTG_BASE + 0xff,
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.flags = IORESOURCE_MEM,
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}, {
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.start = INT_USB_IRQ_OTG,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device otg_device = {
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.name = "omap_otg",
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.id = -1,
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.num_resources = ARRAY_SIZE(otg_resources),
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.resource = otg_resources,
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};
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static inline void otg_device_init(struct omap_usb_config *pdata)
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{
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pdata->otg_device = &otg_device;
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}
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#else
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static inline void otg_device_init(struct omap_usb_config *pdata)
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{
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}
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#endif
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static void omap2_usb_devconf_clear(u8 port, u32 mask)
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{
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u32 r;
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r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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r &= ~USBTXWRMODEI(port, mask);
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omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
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}
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static void omap2_usb_devconf_set(u8 port, u32 mask)
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{
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u32 r;
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r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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r |= USBTXWRMODEI(port, mask);
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omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
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}
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static void omap2_usb2_disable_5pinbitll(void)
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{
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u32 r;
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r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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r &= ~(USBTXWRMODEI(2, USB_BIDIR_TLL) | USBT2TLL5PI);
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omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
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}
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static void omap2_usb2_enable_5pinunitll(void)
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{
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u32 r;
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r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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r |= USBTXWRMODEI(2, USB_UNIDIR_TLL) | USBT2TLL5PI;
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omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
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}
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static u32 __init omap2_usb0_init(unsigned nwires, unsigned is_device)
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{
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u32 syscon1 = 0;
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omap2_usb_devconf_clear(0, USB_BIDIR_TLL);
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if (nwires == 0)
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return 0;
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if (is_device)
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omap_mux_init_signal("usb0_puen", 0);
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omap_mux_init_signal("usb0_dat", 0);
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omap_mux_init_signal("usb0_txen", 0);
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omap_mux_init_signal("usb0_se0", 0);
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if (nwires != 3)
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omap_mux_init_signal("usb0_rcv", 0);
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switch (nwires) {
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case 3:
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syscon1 = 2;
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omap2_usb_devconf_set(0, USB_BIDIR);
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break;
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case 4:
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syscon1 = 1;
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omap2_usb_devconf_set(0, USB_BIDIR);
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break;
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case 6:
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syscon1 = 3;
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omap_mux_init_signal("usb0_vp", 0);
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omap_mux_init_signal("usb0_vm", 0);
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omap2_usb_devconf_set(0, USB_UNIDIR);
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break;
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default:
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printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
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0, nwires);
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}
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return syscon1 << 16;
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}
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static u32 __init omap2_usb1_init(unsigned nwires)
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{
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u32 syscon1 = 0;
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omap2_usb_devconf_clear(1, USB_BIDIR_TLL);
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if (nwires == 0)
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return 0;
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/* NOTE: board-specific code must set up pin muxing for usb1,
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* since each signal could come out on either of two balls.
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*/
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switch (nwires) {
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case 2:
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/* NOTE: board-specific code must override this setting if
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* this TLL link is not using DP/DM
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*/
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syscon1 = 1;
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omap2_usb_devconf_set(1, USB_BIDIR_TLL);
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break;
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case 3:
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syscon1 = 2;
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omap2_usb_devconf_set(1, USB_BIDIR);
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break;
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case 4:
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syscon1 = 1;
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omap2_usb_devconf_set(1, USB_BIDIR);
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break;
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case 6:
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default:
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printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
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1, nwires);
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}
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return syscon1 << 20;
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}
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static u32 __init omap2_usb2_init(unsigned nwires, unsigned alt_pingroup)
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{
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u32 syscon1 = 0;
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omap2_usb2_disable_5pinbitll();
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alt_pingroup = 0;
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/* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
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if (alt_pingroup || nwires == 0)
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return 0;
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omap_mux_init_signal("usb2_dat", 0);
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omap_mux_init_signal("usb2_se0", 0);
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if (nwires > 2)
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omap_mux_init_signal("usb2_txen", 0);
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if (nwires > 3)
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omap_mux_init_signal("usb2_rcv", 0);
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switch (nwires) {
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case 2:
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/* NOTE: board-specific code must override this setting if
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* this TLL link is not using DP/DM
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*/
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syscon1 = 1;
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omap2_usb_devconf_set(2, USB_BIDIR_TLL);
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break;
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case 3:
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syscon1 = 2;
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omap2_usb_devconf_set(2, USB_BIDIR);
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break;
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case 4:
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syscon1 = 1;
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omap2_usb_devconf_set(2, USB_BIDIR);
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break;
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case 5:
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/* NOTE: board-specific code must mux this setting depending
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* on TLL link using DP/DM. Something must also
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* set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
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* 2420: hdq_sio.usb2_tllse0 or vlynq_rx0.usb2_tllse0
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* 2430: hdq_sio.usb2_tllse0 or sdmmc2_dat0.usb2_tllse0
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*/
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syscon1 = 3;
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omap2_usb2_enable_5pinunitll();
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break;
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case 6:
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default:
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printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
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2, nwires);
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}
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return syscon1 << 24;
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}
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void __init omap2_usbfs_init(struct omap_usb_config *pdata)
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{
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struct clk *ick;
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if (!cpu_is_omap24xx())
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return;
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ick = clk_get(NULL, "usb_l4_ick");
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if (IS_ERR(ick))
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return;
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clk_enable(ick);
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pdata->usb0_init = omap2_usb0_init;
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pdata->usb1_init = omap2_usb1_init;
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pdata->usb2_init = omap2_usb2_init;
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udc_device_init(pdata);
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ohci_device_init(pdata);
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otg_device_init(pdata);
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omap_otg_init(pdata);
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clk_disable(ick);
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clk_put(ick);
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}
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#endif
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