diff options
Diffstat (limited to 'arch/arm/plat-omap/usb.c')
| -rw-r--r-- | arch/arm/plat-omap/usb.c | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/usb.c b/arch/arm/plat-omap/usb.c new file mode 100644 index 0000000..ab38e4e --- /dev/null +++ b/arch/arm/plat-omap/usb.c @@ -0,0 +1,593 @@ +/* + * 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/config.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/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/mach-types.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. + * + * 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 + +/*-------------------------------------------------------------------------*/ + +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; +} + +/*-------------------------------------------------------------------------*/ + +#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, + .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_OMAP1510 + +#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) +{ + int status; + 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) { + 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) { + 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); |