// 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/io.h> #include <asm/irq.h> #include <mach/mux.h> #include <mach/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) { /* IRQ numbers for omap7xx */ if(cpu_is_omap7xx()) { udc_resources[1].start = INT_7XX_USB_GENI; udc_resources[2].start = INT_7XX_USB_NON_ISO; udc_resources[3].start = INT_7XX_USB_ISO; } pdata->udc_device = &udc_device; } #else static inline void udc_device_init(struct omap_usb_config *pdata) { } #endif #if IS_ENABLED(CONFIG_USB_OHCI_HCD) /* 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 (cpu_is_omap7xx()) ohci_resources[1].start = INT_7XX_USB_HHC_1; pdata->ohci_device = &ohci_device; pdata->ocpi_enable = &ocpi_enable; } #else static inline void ohci_device_init(struct omap_usb_config *pdata) { } #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, .num_resources = ARRAY_SIZE(otg_resources), .resource = otg_resources, }; static inline void otg_device_init(struct omap_usb_config *pdata) { if (cpu_is_omap7xx()) otg_resources[1].start = INT_7XX_USB_OTG; 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) { if (cpu_is_omap7xx()) { omap_cfg_reg(AA17_7XX_USB_DM); omap_cfg_reg(W16_7XX_USB_PU_EN); omap_cfg_reg(W17_7XX_USB_VBUSI); omap_cfg_reg(W18_7XX_USB_DMCK_OUT); omap_cfg_reg(W19_7XX_USB_DCRST); } else 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 */ /* Don't do this for omap7xx -- it causes USB to not work correctly */ if (!cpu_is_omap7xx()) { 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 /* 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) 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 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_omap7xx() || 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"); }