diff options
Diffstat (limited to 'target/linux/ubicom32/files/drivers/usb/musb/ubi32_usb.c')
| -rw-r--r-- | target/linux/ubicom32/files/drivers/usb/musb/ubi32_usb.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/drivers/usb/musb/ubi32_usb.c b/target/linux/ubicom32/files/drivers/usb/musb/ubi32_usb.c new file mode 100644 index 000000000..d89e00416 --- /dev/null +++ b/target/linux/ubicom32/files/drivers/usb/musb/ubi32_usb.c @@ -0,0 +1,156 @@ +/* + * drivers/usb/musb/ubi32_usb.c + * Ubicom32 usb controller driver. + * + * (C) Copyright 2009, Ubicom, Inc. + * Copyright (C) 2005-2006 by Texas Instruments + * + * Derived from the Texas Instruments Inventra Controller Driver for Linux. + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port 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. + * + * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/clk.h> +#include <linux/io.h> + +#include <asm/io.h> +#include <asm/ip5000.h> +#include "musb_core.h" + +void musb_platform_enable(struct musb *musb) +{ +} +void musb_platform_disable(struct musb *musb) +{ +} + +int musb_platform_set_mode(struct musb *musb, u8 musb_mode) { + return 0; +} + +static void ip5k_usb_hcd_vbus_power(struct musb *musb, int is_on, int sleeping) +{ +} + +static void ip5k_usb_hcd_set_vbus(struct musb *musb, int is_on) +{ + u8 devctl; + /* HDRC controls CPEN, but beware current surges during device + * connect. They can trigger transient overcurrent conditions + * that must be ignored. + */ + + devctl = musb_readb(musb->mregs, MUSB_DEVCTL); + + if (is_on) { + musb->is_active = 1; + musb->xceiv.default_a = 1; + musb->xceiv.state = OTG_STATE_A_WAIT_VRISE; + devctl |= MUSB_DEVCTL_SESSION; + + MUSB_HST_MODE(musb); + } else { + musb->is_active = 0; + + /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and + * jumping right to B_IDLE... + */ + + musb->xceiv.default_a = 0; + musb->xceiv.state = OTG_STATE_B_IDLE; + devctl &= ~MUSB_DEVCTL_SESSION; + + MUSB_DEV_MODE(musb); + } + musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); + + DBG(1, "VBUS %s, devctl %02x " + /* otg %3x conf %08x prcm %08x */ "\n", + otg_state_string(musb), + musb_readb(musb->mregs, MUSB_DEVCTL)); +} +static int ip5k_usb_hcd_set_power(struct otg_transceiver *x, unsigned mA) +{ + return 0; +} + +static int musb_platform_resume(struct musb *musb); + +int __init musb_platform_init(struct musb *musb) +{ + +#ifdef CONFIG_UBICOM32_V4 + u32_t chip_id; + asm volatile ( + "move.4 %0, CHIP_ID \n\t" + : "=r" (chip_id) + ); + if (chip_id == 0x30001) { + *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 30); + udelay(1); + *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 31); + } else { + *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 17); + udelay(1); + *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 14); + } +#endif + + *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_CFG)) |= ((1 << 14) | (1 <<15)); + + /* The i-clk is AUTO gated. Hence there is no need + * to disable it until the driver is shutdown */ + + clk_enable(musb->clock); + musb_platform_resume(musb); + + ip5k_usb_hcd_vbus_power(musb, musb->board_mode == MUSB_HOST, 1); + + if (is_host_enabled(musb)) + musb->board_set_vbus = ip5k_usb_hcd_set_vbus; + if (is_peripheral_enabled(musb)) + musb->xceiv.set_power = ip5k_usb_hcd_set_power; + + return 0; +} + + +int musb_platform_suspend(struct musb *musb) +{ + return 0; +} +int musb_platform_resume(struct musb *musb) +{ + return 0; +} + +int musb_platform_exit(struct musb *musb) +{ + ip5k_usb_hcd_vbus_power(musb, 0 /*off*/, 1); + musb_platform_suspend(musb); + return 0; +} |