/* * 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> #ifdef CONFIG_ARCH_OMAP1 #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 #else #define INT_USB_IRQ_GEN INT_24XX_USB_IRQ_GEN #define INT_USB_IRQ_NISO INT_24XX_USB_IRQ_NISO #define INT_USB_IRQ_ISO INT_24XX_USB_IRQ_ISO #define INT_USB_IRQ_HGEN INT_24XX_USB_IRQ_HGEN #define INT_USB_IRQ_OTG INT_24XX_USB_IRQ_OTG #endif /* 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 */ /*-------------------------------------------------------------------------*/ #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 (cpu_is_omap24xx()) CONTROL_DEVCONF_REG &= ~USBT0WRMODEI(USB_BIDIR_TLL); if (nwires == 0) { if (cpu_class_is_omap1() && !cpu_is_omap15xx()) { /* pulldown D+/D- */ USB_TRANSCEIVER_CTRL_REG &= ~(3 << 1); } return 0; } if (is_device) { if (cpu_is_omap24xx()) omap_cfg_reg(J20_24XX_USB0_PUEN); else omap_cfg_reg(W4_USB_PUEN); } /* internal transceiver (unavailable on 17xx, 24xx) */ if (!cpu_class_is_omap2() && 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; } if (cpu_is_omap24xx()) { omap_cfg_reg(K18_24XX_USB0_DAT); omap_cfg_reg(K19_24XX_USB0_TXEN); omap_cfg_reg(J14_24XX_USB0_SE0); if (nwires != 3) omap_cfg_reg(J18_24XX_USB0_RCV); } else { 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 (cpu_class_is_omap1() && nwires != 6) USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R; switch (nwires) { case 3: syscon1 = 2; if (cpu_is_omap24xx()) CONTROL_DEVCONF_REG |= USBT0WRMODEI(USB_BIDIR); break; case 4: syscon1 = 1; if (cpu_is_omap24xx()) CONTROL_DEVCONF_REG |= USBT0WRMODEI(USB_BIDIR); break; case 6: syscon1 = 3; if (cpu_is_omap24xx()) { omap_cfg_reg(J19_24XX_USB0_VP); omap_cfg_reg(K20_24XX_USB0_VM); CONTROL_DEVCONF_REG |= USBT0WRMODEI(USB_UNIDIR); } else { 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 (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB1_UNI_R; if (cpu_is_omap24xx()) CONTROL_DEVCONF_REG &= ~USBT1WRMODEI(USB_BIDIR_TLL); if (nwires == 0) return 0; /* external transceiver */ if (cpu_class_is_omap1()) { 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 if (cpu_is_omap24xx()) { /* NOTE: board-specific code must set up pin muxing for usb1, * since each signal could come out on either of two balls. */ } else { pr_debug("usb%d cpu unrecognized\n", 1); return 0; } switch (nwires) { case 2: if (!cpu_is_omap24xx()) goto bad; /* NOTE: board-specific code must override this setting if * this TLL link is not using DP/DM */ syscon1 = 1; CONTROL_DEVCONF_REG |= USBT1WRMODEI(USB_BIDIR_TLL); break; case 3: syscon1 = 2; if (cpu_is_omap24xx()) CONTROL_DEVCONF_REG |= USBT1WRMODEI(USB_BIDIR); break; case 4: syscon1 = 1; if (cpu_is_omap24xx()) CONTROL_DEVCONF_REG |= USBT1WRMODEI(USB_BIDIR); break; case 6: if (cpu_is_omap24xx()) goto bad; 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: bad: 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; if (cpu_is_omap24xx()) { CONTROL_DEVCONF_REG &= ~(USBT2WRMODEI(USB_BIDIR_TLL) | USBT2TLL5PI); alt_pingroup = 0; } /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */ if (alt_pingroup || nwires == 0) return 0; if (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) 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 if (cpu_is_omap24xx()) { omap_cfg_reg(Y11_24XX_USB2_DAT); omap_cfg_reg(AA10_24XX_USB2_SE0); if (nwires > 2) omap_cfg_reg(AA12_24XX_USB2_TXEN); if (nwires > 3) omap_cfg_reg(AA6_24XX_USB2_RCV); } else { pr_debug("usb%d cpu unrecognized\n", 1); return 0; } // if (cpu_class_is_omap1()) omap_cfg_reg(USB2_SUSP); switch (nwires) { case 2: if (!cpu_is_omap24xx()) goto bad; /* NOTE: board-specific code must override this setting if * this TLL link is not using DP/DM */ syscon1 = 1; CONTROL_DEVCONF_REG |= USBT2WRMODEI(USB_BIDIR_TLL); break; case 3: syscon1 = 2; if (cpu_is_omap24xx()) CONTROL_DEVCONF_REG |= USBT2WRMODEI(USB_BIDIR); break; case 4: syscon1 = 1; if (cpu_is_omap24xx()) CONTROL_DEVCONF_REG |= USBT2WRMODEI(USB_BIDIR); break; case 5: if (!cpu_is_omap24xx()) goto bad; omap_cfg_reg(AA4_24XX_USB2_TLLSE0); /* NOTE: board-specific code must override this setting if * this TLL link is not using DP/DM. Something must also * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED} */ syscon1 = 3; CONTROL_DEVCONF_REG |= USBT2WRMODEI(USB_UNIDIR_TLL) | USBT2TLL5PI; break; case 6: if (cpu_is_omap24xx()) goto bad; 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: bad: 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 = 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 = { .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 + 0xff, .flags = IORESOURCE_MEM, }, { .start = INT_USB_IRQ_HGEN, .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 = INT_USB_IRQ_OTG, .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 (on omap1) 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 if (cpu_class_is_omap1()) 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"); if (cpu_class_is_omap1()) { /* 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() || cpu_is_omap24xx()) 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);