![Greg Kroah-Hartman](/assets/img/avatar_default.png)
splits OTG functionality away from transceivers. We have known for quite a long time that struct otg_transceiver was a bad name for the structure, considering transceiver is far from being OTG-specific (see4e67185
). -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJPTeeMAAoJEIaOsuA1yqRE6ZAP/j2G6DaDyng6vpyYQi2drXaY NKx3pA0sC98NACOv6sh+urcMDcDctLmOnwV18U+GNNP+qExQFnyuc7iGsXRxfUOj qkIbVPxzPcE0opmEMFJ5ZT85rw33DqKjFnQT4av3wwXe/qSrEkAfBoBSb6wn73rA v0JOhceGsFb+kJAc7U9Ji9A9xSjj+6uw08RTuuQv8KBLb5Pws+NoQ6UEjlni8umA lkOSelyBZN1OJU+fZKIpS4+SiwtdkZCm2wSIUiwaPosdJgw0w8fz0zNjn/4gAHB1 oPyjjjP3/VDegp9CuYDRlnBgQa2K4V1vbjrBfhKbyar8fsOSoaPVv1fR9VKgVnT8 RKlXKSeFEsdP4fOGYCjNKAzjeQH/qSNzdzo+s4GMqoWq7Lm3+b56zdQWvRmTT7Xg ++bMqFAi0noeU8aZWwSDMFiYv6O19o+Px4OTS/3aRmR1wdJpUUSk2M7Quw6A/YNj 4Q5hDvio2eYtI1nya9yMS/j4ZiJ5fDQb5jUfBDB1MKtkZKKzVVSboK8P/rFq5+xf xdUfBRd7/fMk+he6RtemfjhMdYTiX6Cm6VzveZVBL4+7dERbnJDRgDhSJOYvA/eW Bvc7BY+/EYz7msF0gjLyWu3BBiChajk/D5ukoCIssUPGuIhmO1S7JRi1s+fLaNs3 Bz8Haxql69YWrNL2ouQf =WiB6 -----END PGP SIGNATURE----- Merge tag 'xceiv-for-v3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next USB: transceiver changes for 3.4 Here we have a big rework done by Heikki Krogerus (thanks) which splits OTG functionality away from transceivers. We have known for quite a long time that struct otg_transceiver was a bad name for the structure, considering transceiver is far from being OTG-specific (see4e67185
).
1266 lines
34 KiB
C
1266 lines
34 KiB
C
/*
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* TUSB6010 USB 2.0 OTG Dual Role controller
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*
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* Copyright (C) 2006 Nokia Corporation
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* Tony Lindgren <tony@atomide.com>
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* Notes:
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* - Driver assumes that interface to external host (main CPU) is
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* configured for NOR FLASH interface instead of VLYNQ serial
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* interface.
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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/errno.h>
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#include <linux/init.h>
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#include <linux/prefetch.h>
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#include <linux/usb.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include "musb_core.h"
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struct tusb6010_glue {
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struct device *dev;
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struct platform_device *musb;
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};
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static void tusb_musb_set_vbus(struct musb *musb, int is_on);
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#define TUSB_REV_MAJOR(reg_val) ((reg_val >> 4) & 0xf)
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#define TUSB_REV_MINOR(reg_val) (reg_val & 0xf)
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/*
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* Checks the revision. We need to use the DMA register as 3.0 does not
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* have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
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*/
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u8 tusb_get_revision(struct musb *musb)
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{
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void __iomem *tbase = musb->ctrl_base;
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u32 die_id;
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u8 rev;
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rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
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if (TUSB_REV_MAJOR(rev) == 3) {
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die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
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TUSB_DIDR1_HI));
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if (die_id >= TUSB_DIDR1_HI_REV_31)
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rev |= 1;
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}
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return rev;
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}
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EXPORT_SYMBOL_GPL(tusb_get_revision);
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static int tusb_print_revision(struct musb *musb)
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{
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void __iomem *tbase = musb->ctrl_base;
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u8 rev;
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rev = tusb_get_revision(musb);
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pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
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"prcm",
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TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
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TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
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"int",
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TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
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TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
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"gpio",
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TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
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TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
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"dma",
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TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
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TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
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"dieid",
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TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
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"rev",
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TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
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return tusb_get_revision(musb);
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}
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#define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
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| TUSB_PHY_OTG_CTRL_TESTM0)
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/*
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* Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
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* Disables power detection in PHY for the duration of idle.
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*/
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static void tusb_wbus_quirk(struct musb *musb, int enabled)
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{
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void __iomem *tbase = musb->ctrl_base;
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static u32 phy_otg_ctrl, phy_otg_ena;
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u32 tmp;
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if (enabled) {
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phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
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phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
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tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
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| phy_otg_ena | WBUS_QUIRK_MASK;
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musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
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tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
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tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
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musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
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dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
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musb_readl(tbase, TUSB_PHY_OTG_CTRL),
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musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
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} else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
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& TUSB_PHY_OTG_CTRL_TESTM2) {
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tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
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musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
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tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
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musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
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dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
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musb_readl(tbase, TUSB_PHY_OTG_CTRL),
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musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
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phy_otg_ctrl = 0;
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phy_otg_ena = 0;
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}
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}
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/*
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* TUSB 6010 may use a parallel bus that doesn't support byte ops;
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* so both loading and unloading FIFOs need explicit byte counts.
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*/
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static inline void
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tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
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{
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u32 val;
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int i;
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if (len > 4) {
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for (i = 0; i < (len >> 2); i++) {
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memcpy(&val, buf, 4);
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musb_writel(fifo, 0, val);
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buf += 4;
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}
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len %= 4;
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}
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if (len > 0) {
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/* Write the rest 1 - 3 bytes to FIFO */
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memcpy(&val, buf, len);
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musb_writel(fifo, 0, val);
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}
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}
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static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
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void __iomem *buf, u16 len)
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{
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u32 val;
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int i;
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if (len > 4) {
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for (i = 0; i < (len >> 2); i++) {
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val = musb_readl(fifo, 0);
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memcpy(buf, &val, 4);
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buf += 4;
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}
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len %= 4;
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}
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if (len > 0) {
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/* Read the rest 1 - 3 bytes from FIFO */
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val = musb_readl(fifo, 0);
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memcpy(buf, &val, len);
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}
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}
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void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
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{
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struct musb *musb = hw_ep->musb;
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void __iomem *ep_conf = hw_ep->conf;
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void __iomem *fifo = hw_ep->fifo;
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u8 epnum = hw_ep->epnum;
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prefetch(buf);
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dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
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'T', epnum, fifo, len, buf);
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if (epnum)
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musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
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TUSB_EP_CONFIG_XFR_SIZE(len));
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else
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musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
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TUSB_EP0_CONFIG_XFR_SIZE(len));
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if (likely((0x01 & (unsigned long) buf) == 0)) {
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/* Best case is 32bit-aligned destination address */
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if ((0x02 & (unsigned long) buf) == 0) {
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if (len >= 4) {
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writesl(fifo, buf, len >> 2);
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buf += (len & ~0x03);
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len &= 0x03;
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}
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} else {
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if (len >= 2) {
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u32 val;
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int i;
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/* Cannot use writesw, fifo is 32-bit */
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for (i = 0; i < (len >> 2); i++) {
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val = (u32)(*(u16 *)buf);
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buf += 2;
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val |= (*(u16 *)buf) << 16;
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buf += 2;
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musb_writel(fifo, 0, val);
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}
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len &= 0x03;
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}
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}
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}
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if (len > 0)
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tusb_fifo_write_unaligned(fifo, buf, len);
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}
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void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
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{
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struct musb *musb = hw_ep->musb;
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void __iomem *ep_conf = hw_ep->conf;
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void __iomem *fifo = hw_ep->fifo;
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u8 epnum = hw_ep->epnum;
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dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
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'R', epnum, fifo, len, buf);
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if (epnum)
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musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
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TUSB_EP_CONFIG_XFR_SIZE(len));
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else
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musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
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if (likely((0x01 & (unsigned long) buf) == 0)) {
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/* Best case is 32bit-aligned destination address */
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if ((0x02 & (unsigned long) buf) == 0) {
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if (len >= 4) {
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readsl(fifo, buf, len >> 2);
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buf += (len & ~0x03);
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len &= 0x03;
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}
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} else {
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if (len >= 2) {
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u32 val;
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int i;
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/* Cannot use readsw, fifo is 32-bit */
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for (i = 0; i < (len >> 2); i++) {
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val = musb_readl(fifo, 0);
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*(u16 *)buf = (u16)(val & 0xffff);
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buf += 2;
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*(u16 *)buf = (u16)(val >> 16);
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buf += 2;
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}
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len &= 0x03;
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}
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}
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}
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if (len > 0)
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tusb_fifo_read_unaligned(fifo, buf, len);
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}
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static struct musb *the_musb;
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/* This is used by gadget drivers, and OTG transceiver logic, allowing
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* at most mA current to be drawn from VBUS during a Default-B session
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* (that is, while VBUS exceeds 4.4V). In Default-A (including pure host
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* mode), or low power Default-B sessions, something else supplies power.
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* Caller must take care of locking.
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*/
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static int tusb_draw_power(struct usb_phy *x, unsigned mA)
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{
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struct musb *musb = the_musb;
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void __iomem *tbase = musb->ctrl_base;
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u32 reg;
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/* tps65030 seems to consume max 100mA, with maybe 60mA available
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* (measured on one board) for things other than tps and tusb.
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*
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* Boards sharing the CPU clock with CLKIN will need to prevent
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* certain idle sleep states while the USB link is active.
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*
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* REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
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* The actual current usage would be very board-specific. For now,
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* it's simpler to just use an aggregate (also board-specific).
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*/
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if (x->otg->default_a || mA < (musb->min_power << 1))
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mA = 0;
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reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
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if (mA) {
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musb->is_bus_powered = 1;
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reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
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} else {
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musb->is_bus_powered = 0;
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reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
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}
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musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
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dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
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return 0;
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}
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/* workaround for issue 13: change clock during chip idle
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* (to be fixed in rev3 silicon) ... symptoms include disconnect
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* or looping suspend/resume cycles
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*/
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static void tusb_set_clock_source(struct musb *musb, unsigned mode)
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{
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void __iomem *tbase = musb->ctrl_base;
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u32 reg;
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reg = musb_readl(tbase, TUSB_PRCM_CONF);
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reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
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/* 0 = refclk (clkin, XI)
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* 1 = PHY 60 MHz (internal PLL)
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* 2 = not supported
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* 3 = what?
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*/
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if (mode > 0)
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reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
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musb_writel(tbase, TUSB_PRCM_CONF, reg);
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/* FIXME tusb6010_platform_retime(mode == 0); */
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}
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/*
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* Idle TUSB6010 until next wake-up event; NOR access always wakes.
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* Other code ensures that we idle unless we're connected _and_ the
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* USB link is not suspended ... and tells us the relevant wakeup
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* events. SW_EN for voltage is handled separately.
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*/
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static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
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{
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void __iomem *tbase = musb->ctrl_base;
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u32 reg;
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if ((wakeup_enables & TUSB_PRCM_WBUS)
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&& (tusb_get_revision(musb) == TUSB_REV_30))
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tusb_wbus_quirk(musb, 1);
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tusb_set_clock_source(musb, 0);
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wakeup_enables |= TUSB_PRCM_WNORCS;
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musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
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/* REVISIT writeup of WID implies that if WID set and ID is grounded,
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* TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
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* Presumably that's mostly to save power, hence WID is immaterial ...
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*/
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reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
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/* issue 4: when driving vbus, use hipower (vbus_det) comparator */
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if (is_host_active(musb)) {
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reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
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reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
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} else {
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reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
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reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
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}
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reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
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musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
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dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
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}
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/*
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* Updates cable VBUS status. Caller must take care of locking.
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*/
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static int tusb_musb_vbus_status(struct musb *musb)
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{
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void __iomem *tbase = musb->ctrl_base;
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u32 otg_stat, prcm_mngmt;
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int ret = 0;
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otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
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prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
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/* Temporarily enable VBUS detection if it was disabled for
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* suspend mode. Unless it's enabled otg_stat and devctl will
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* not show correct VBUS state.
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*/
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if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
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u32 tmp = prcm_mngmt;
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tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
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musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
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otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
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musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
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}
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if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
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ret = 1;
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return ret;
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}
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|
static struct timer_list musb_idle_timer;
|
|
|
|
static void musb_do_idle(unsigned long _musb)
|
|
{
|
|
struct musb *musb = (void *)_musb;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
|
|
|
switch (musb->xceiv->state) {
|
|
case OTG_STATE_A_WAIT_BCON:
|
|
if ((musb->a_wait_bcon != 0)
|
|
&& (musb->idle_timeout == 0
|
|
|| time_after(jiffies, musb->idle_timeout))) {
|
|
dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
|
|
otg_state_string(musb->xceiv->state));
|
|
}
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_A_IDLE:
|
|
tusb_musb_set_vbus(musb, 0);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!musb->is_active) {
|
|
u32 wakeups;
|
|
|
|
/* wait until khubd handles port change status */
|
|
if (is_host_active(musb) && (musb->port1_status >> 16))
|
|
goto done;
|
|
|
|
if (is_peripheral_enabled(musb) && !musb->gadget_driver) {
|
|
wakeups = 0;
|
|
} else {
|
|
wakeups = TUSB_PRCM_WHOSTDISCON
|
|
| TUSB_PRCM_WBUS
|
|
| TUSB_PRCM_WVBUS;
|
|
if (is_otg_enabled(musb))
|
|
wakeups |= TUSB_PRCM_WID;
|
|
}
|
|
tusb_allow_idle(musb, wakeups);
|
|
}
|
|
done:
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Maybe put TUSB6010 into idle mode mode depending on USB link status,
|
|
* like "disconnected" or "suspended". We'll be woken out of it by
|
|
* connect, resume, or disconnect.
|
|
*
|
|
* Needs to be called as the last function everywhere where there is
|
|
* register access to TUSB6010 because of NOR flash wake-up.
|
|
* Caller should own controller spinlock.
|
|
*
|
|
* Delay because peripheral enables D+ pullup 3msec after SE0, and
|
|
* we don't want to treat that full speed J as a wakeup event.
|
|
* ... peripherals must draw only suspend current after 10 msec.
|
|
*/
|
|
static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
|
|
{
|
|
unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
|
|
static unsigned long last_timer;
|
|
|
|
if (timeout == 0)
|
|
timeout = default_timeout;
|
|
|
|
/* Never idle if active, or when VBUS timeout is not set as host */
|
|
if (musb->is_active || ((musb->a_wait_bcon == 0)
|
|
&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
|
|
dev_dbg(musb->controller, "%s active, deleting timer\n",
|
|
otg_state_string(musb->xceiv->state));
|
|
del_timer(&musb_idle_timer);
|
|
last_timer = jiffies;
|
|
return;
|
|
}
|
|
|
|
if (time_after(last_timer, timeout)) {
|
|
if (!timer_pending(&musb_idle_timer))
|
|
last_timer = timeout;
|
|
else {
|
|
dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
|
|
return;
|
|
}
|
|
}
|
|
last_timer = timeout;
|
|
|
|
dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
|
|
otg_state_string(musb->xceiv->state),
|
|
(unsigned long)jiffies_to_msecs(timeout - jiffies));
|
|
mod_timer(&musb_idle_timer, timeout);
|
|
}
|
|
|
|
/* ticks of 60 MHz clock */
|
|
#define DEVCLOCK 60000000
|
|
#define OTG_TIMER_MS(msecs) ((msecs) \
|
|
? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
|
|
| TUSB_DEV_OTG_TIMER_ENABLE) \
|
|
: 0)
|
|
|
|
static void tusb_musb_set_vbus(struct musb *musb, int is_on)
|
|
{
|
|
void __iomem *tbase = musb->ctrl_base;
|
|
u32 conf, prcm, timer;
|
|
u8 devctl;
|
|
struct usb_otg *otg = musb->xceiv->otg;
|
|
|
|
/* HDRC controls CPEN, but beware current surges during device
|
|
* connect. They can trigger transient overcurrent conditions
|
|
* that must be ignored.
|
|
*/
|
|
|
|
prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
|
|
conf = musb_readl(tbase, TUSB_DEV_CONF);
|
|
devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
|
|
|
|
if (is_on) {
|
|
timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
|
|
otg->default_a = 1;
|
|
musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
|
|
devctl |= MUSB_DEVCTL_SESSION;
|
|
|
|
conf |= TUSB_DEV_CONF_USB_HOST_MODE;
|
|
MUSB_HST_MODE(musb);
|
|
} else {
|
|
u32 otg_stat;
|
|
|
|
timer = 0;
|
|
|
|
/* If ID pin is grounded, we want to be a_idle */
|
|
otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
|
|
if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
|
|
switch (musb->xceiv->state) {
|
|
case OTG_STATE_A_WAIT_VRISE:
|
|
case OTG_STATE_A_WAIT_BCON:
|
|
musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
|
|
break;
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
musb->xceiv->state = OTG_STATE_A_IDLE;
|
|
break;
|
|
default:
|
|
musb->xceiv->state = OTG_STATE_A_IDLE;
|
|
}
|
|
musb->is_active = 0;
|
|
otg->default_a = 1;
|
|
MUSB_HST_MODE(musb);
|
|
} else {
|
|
musb->is_active = 0;
|
|
otg->default_a = 0;
|
|
musb->xceiv->state = OTG_STATE_B_IDLE;
|
|
MUSB_DEV_MODE(musb);
|
|
}
|
|
|
|
devctl &= ~MUSB_DEVCTL_SESSION;
|
|
conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
|
|
}
|
|
prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
|
|
|
|
musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
|
|
musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
|
|
musb_writel(tbase, TUSB_DEV_CONF, conf);
|
|
musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
|
|
|
|
dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
|
|
otg_state_string(musb->xceiv->state),
|
|
musb_readb(musb->mregs, MUSB_DEVCTL),
|
|
musb_readl(tbase, TUSB_DEV_OTG_STAT),
|
|
conf, prcm);
|
|
}
|
|
|
|
/*
|
|
* Sets the mode to OTG, peripheral or host by changing the ID detection.
|
|
* Caller must take care of locking.
|
|
*
|
|
* Note that if a mini-A cable is plugged in the ID line will stay down as
|
|
* the weak ID pull-up is not able to pull the ID up.
|
|
*
|
|
* REVISIT: It would be possible to add support for changing between host
|
|
* and peripheral modes in non-OTG configurations by reconfiguring hardware
|
|
* and then setting musb->board_mode. For now, only support OTG mode.
|
|
*/
|
|
static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
|
|
{
|
|
void __iomem *tbase = musb->ctrl_base;
|
|
u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
|
|
|
|
if (musb->board_mode != MUSB_OTG) {
|
|
ERR("Changing mode currently only supported in OTG mode\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
|
|
phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
|
|
phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
|
|
dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
|
|
|
|
switch (musb_mode) {
|
|
|
|
case MUSB_HOST: /* Disable PHY ID detect, ground ID */
|
|
phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
dev_conf |= TUSB_DEV_CONF_ID_SEL;
|
|
dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
|
|
break;
|
|
case MUSB_PERIPHERAL: /* Disable PHY ID detect, keep ID pull-up on */
|
|
phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
|
|
break;
|
|
case MUSB_OTG: /* Use PHY ID detection */
|
|
phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
|
|
break;
|
|
|
|
default:
|
|
dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
musb_writel(tbase, TUSB_PHY_OTG_CTRL,
|
|
TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
|
|
musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
|
|
TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
|
|
musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
|
|
|
|
otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
|
|
if ((musb_mode == MUSB_PERIPHERAL) &&
|
|
!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
|
|
INFO("Cannot be peripheral with mini-A cable "
|
|
"otg_stat: %08x\n", otg_stat);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned long
|
|
tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
|
|
{
|
|
u32 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
|
|
unsigned long idle_timeout = 0;
|
|
struct usb_otg *otg = musb->xceiv->otg;
|
|
|
|
/* ID pin */
|
|
if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
|
|
int default_a;
|
|
|
|
if (is_otg_enabled(musb))
|
|
default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
|
|
else
|
|
default_a = is_host_enabled(musb);
|
|
dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
|
|
otg->default_a = default_a;
|
|
tusb_musb_set_vbus(musb, default_a);
|
|
|
|
/* Don't allow idling immediately */
|
|
if (default_a)
|
|
idle_timeout = jiffies + (HZ * 3);
|
|
}
|
|
|
|
/* VBUS state change */
|
|
if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
|
|
|
|
/* B-dev state machine: no vbus ~= disconnect */
|
|
if ((is_otg_enabled(musb) && !otg->default_a)
|
|
|| !is_host_enabled(musb)) {
|
|
/* ? musb_root_disconnect(musb); */
|
|
musb->port1_status &=
|
|
~(USB_PORT_STAT_CONNECTION
|
|
| USB_PORT_STAT_ENABLE
|
|
| USB_PORT_STAT_LOW_SPEED
|
|
| USB_PORT_STAT_HIGH_SPEED
|
|
| USB_PORT_STAT_TEST
|
|
);
|
|
|
|
if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
|
|
dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
|
|
if (musb->xceiv->state != OTG_STATE_B_IDLE) {
|
|
/* INTR_DISCONNECT can hide... */
|
|
musb->xceiv->state = OTG_STATE_B_IDLE;
|
|
musb->int_usb |= MUSB_INTR_DISCONNECT;
|
|
}
|
|
musb->is_active = 0;
|
|
}
|
|
dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
|
|
otg_state_string(musb->xceiv->state), otg_stat);
|
|
idle_timeout = jiffies + (1 * HZ);
|
|
schedule_work(&musb->irq_work);
|
|
|
|
} else /* A-dev state machine */ {
|
|
dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
|
|
otg_state_string(musb->xceiv->state), otg_stat);
|
|
|
|
switch (musb->xceiv->state) {
|
|
case OTG_STATE_A_IDLE:
|
|
dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
|
|
musb_platform_set_vbus(musb, 1);
|
|
|
|
/* CONNECT can wake if a_wait_bcon is set */
|
|
if (musb->a_wait_bcon != 0)
|
|
musb->is_active = 0;
|
|
else
|
|
musb->is_active = 1;
|
|
|
|
/*
|
|
* OPT FS A TD.4.6 needs few seconds for
|
|
* A_WAIT_VRISE
|
|
*/
|
|
idle_timeout = jiffies + (2 * HZ);
|
|
|
|
break;
|
|
case OTG_STATE_A_WAIT_VRISE:
|
|
/* ignore; A-session-valid < VBUS_VALID/2,
|
|
* we monitor this with the timer
|
|
*/
|
|
break;
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
/* REVISIT this irq triggers during short
|
|
* spikes caused by enumeration ...
|
|
*/
|
|
if (musb->vbuserr_retry) {
|
|
musb->vbuserr_retry--;
|
|
tusb_musb_set_vbus(musb, 1);
|
|
} else {
|
|
musb->vbuserr_retry
|
|
= VBUSERR_RETRY_COUNT;
|
|
tusb_musb_set_vbus(musb, 0);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* OTG timer expiration */
|
|
if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
|
|
u8 devctl;
|
|
|
|
dev_dbg(musb->controller, "%s timer, %03x\n",
|
|
otg_state_string(musb->xceiv->state), otg_stat);
|
|
|
|
switch (musb->xceiv->state) {
|
|
case OTG_STATE_A_WAIT_VRISE:
|
|
/* VBUS has probably been valid for a while now,
|
|
* but may well have bounced out of range a bit
|
|
*/
|
|
devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
|
|
if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
|
|
if ((devctl & MUSB_DEVCTL_VBUS)
|
|
!= MUSB_DEVCTL_VBUS) {
|
|
dev_dbg(musb->controller, "devctl %02x\n", devctl);
|
|
break;
|
|
}
|
|
musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
|
|
musb->is_active = 0;
|
|
idle_timeout = jiffies
|
|
+ msecs_to_jiffies(musb->a_wait_bcon);
|
|
} else {
|
|
/* REVISIT report overcurrent to hub? */
|
|
ERR("vbus too slow, devctl %02x\n", devctl);
|
|
tusb_musb_set_vbus(musb, 0);
|
|
}
|
|
break;
|
|
case OTG_STATE_A_WAIT_BCON:
|
|
if (musb->a_wait_bcon != 0)
|
|
idle_timeout = jiffies
|
|
+ msecs_to_jiffies(musb->a_wait_bcon);
|
|
break;
|
|
case OTG_STATE_A_SUSPEND:
|
|
break;
|
|
case OTG_STATE_B_WAIT_ACON:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
schedule_work(&musb->irq_work);
|
|
|
|
return idle_timeout;
|
|
}
|
|
|
|
static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
|
|
{
|
|
struct musb *musb = __hci;
|
|
void __iomem *tbase = musb->ctrl_base;
|
|
unsigned long flags, idle_timeout = 0;
|
|
u32 int_mask, int_src;
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
|
|
|
/* Mask all interrupts to allow using both edge and level GPIO irq */
|
|
int_mask = musb_readl(tbase, TUSB_INT_MASK);
|
|
musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
|
|
|
|
int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
|
|
dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
|
|
|
|
musb->int_usb = (u8) int_src;
|
|
|
|
/* Acknowledge wake-up source interrupts */
|
|
if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
|
|
u32 reg;
|
|
u32 i;
|
|
|
|
if (tusb_get_revision(musb) == TUSB_REV_30)
|
|
tusb_wbus_quirk(musb, 0);
|
|
|
|
/* there are issues re-locking the PLL on wakeup ... */
|
|
|
|
/* work around issue 8 */
|
|
for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
|
|
musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
|
|
musb_writel(tbase, TUSB_SCRATCH_PAD, i);
|
|
reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
|
|
if (reg == i)
|
|
break;
|
|
dev_dbg(musb->controller, "TUSB NOR not ready\n");
|
|
}
|
|
|
|
/* work around issue 13 (2nd half) */
|
|
tusb_set_clock_source(musb, 1);
|
|
|
|
reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
|
|
musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
|
|
if (reg & ~TUSB_PRCM_WNORCS) {
|
|
musb->is_active = 1;
|
|
schedule_work(&musb->irq_work);
|
|
}
|
|
dev_dbg(musb->controller, "wake %sactive %02x\n",
|
|
musb->is_active ? "" : "in", reg);
|
|
|
|
/* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
|
|
}
|
|
|
|
if (int_src & TUSB_INT_SRC_USB_IP_CONN)
|
|
del_timer(&musb_idle_timer);
|
|
|
|
/* OTG state change reports (annoyingly) not issued by Mentor core */
|
|
if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
|
|
| TUSB_INT_SRC_OTG_TIMEOUT
|
|
| TUSB_INT_SRC_ID_STATUS_CHNG))
|
|
idle_timeout = tusb_otg_ints(musb, int_src, tbase);
|
|
|
|
/* TX dma callback must be handled here, RX dma callback is
|
|
* handled in tusb_omap_dma_cb.
|
|
*/
|
|
if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
|
|
u32 dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
|
|
u32 real_dma_src = musb_readl(tbase, TUSB_DMA_INT_MASK);
|
|
|
|
dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
|
|
real_dma_src = ~real_dma_src & dma_src;
|
|
if (tusb_dma_omap() && real_dma_src) {
|
|
int tx_source = (real_dma_src & 0xffff);
|
|
int i;
|
|
|
|
for (i = 1; i <= 15; i++) {
|
|
if (tx_source & (1 << i)) {
|
|
dev_dbg(musb->controller, "completing ep%i %s\n", i, "tx");
|
|
musb_dma_completion(musb, i, 1);
|
|
}
|
|
}
|
|
}
|
|
musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
|
|
}
|
|
|
|
/* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
|
|
if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
|
|
u32 musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
|
|
|
|
musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
|
|
musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
|
|
musb->int_tx = (musb_src & 0xffff);
|
|
} else {
|
|
musb->int_rx = 0;
|
|
musb->int_tx = 0;
|
|
}
|
|
|
|
if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
|
|
musb_interrupt(musb);
|
|
|
|
/* Acknowledge TUSB interrupts. Clear only non-reserved bits */
|
|
musb_writel(tbase, TUSB_INT_SRC_CLEAR,
|
|
int_src & ~TUSB_INT_MASK_RESERVED_BITS);
|
|
|
|
tusb_musb_try_idle(musb, idle_timeout);
|
|
|
|
musb_writel(tbase, TUSB_INT_MASK, int_mask);
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int dma_off;
|
|
|
|
/*
|
|
* Enables TUSB6010. Caller must take care of locking.
|
|
* REVISIT:
|
|
* - Check what is unnecessary in MGC_HdrcStart()
|
|
*/
|
|
static void tusb_musb_enable(struct musb *musb)
|
|
{
|
|
void __iomem *tbase = musb->ctrl_base;
|
|
|
|
/* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
|
|
* REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
|
|
musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
|
|
|
|
/* Setup TUSB interrupt, disable DMA and GPIO interrupts */
|
|
musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
|
|
musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
|
|
musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
|
|
|
|
/* Clear all subsystem interrups */
|
|
musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
|
|
musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
|
|
musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
|
|
|
|
/* Acknowledge pending interrupt(s) */
|
|
musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
|
|
|
|
/* Only 0 clock cycles for minimum interrupt de-assertion time and
|
|
* interrupt polarity active low seems to work reliably here */
|
|
musb_writel(tbase, TUSB_INT_CTRL_CONF,
|
|
TUSB_INT_CTRL_CONF_INT_RELCYC(0));
|
|
|
|
irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
|
|
|
|
/* maybe force into the Default-A OTG state machine */
|
|
if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
|
|
& TUSB_DEV_OTG_STAT_ID_STATUS))
|
|
musb_writel(tbase, TUSB_INT_SRC_SET,
|
|
TUSB_INT_SRC_ID_STATUS_CHNG);
|
|
|
|
if (is_dma_capable() && dma_off)
|
|
printk(KERN_WARNING "%s %s: dma not reactivated\n",
|
|
__FILE__, __func__);
|
|
else
|
|
dma_off = 1;
|
|
}
|
|
|
|
/*
|
|
* Disables TUSB6010. Caller must take care of locking.
|
|
*/
|
|
static void tusb_musb_disable(struct musb *musb)
|
|
{
|
|
void __iomem *tbase = musb->ctrl_base;
|
|
|
|
/* FIXME stop DMA, IRQs, timers, ... */
|
|
|
|
/* disable all IRQs */
|
|
musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
|
|
musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
|
|
musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
|
|
musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
|
|
|
|
del_timer(&musb_idle_timer);
|
|
|
|
if (is_dma_capable() && !dma_off) {
|
|
printk(KERN_WARNING "%s %s: dma still active\n",
|
|
__FILE__, __func__);
|
|
dma_off = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Sets up TUSB6010 CPU interface specific signals and registers
|
|
* Note: Settings optimized for OMAP24xx
|
|
*/
|
|
static void tusb_setup_cpu_interface(struct musb *musb)
|
|
{
|
|
void __iomem *tbase = musb->ctrl_base;
|
|
|
|
/*
|
|
* Disable GPIO[5:0] pullups (used as output DMA requests)
|
|
* Don't disable GPIO[7:6] as they are needed for wake-up.
|
|
*/
|
|
musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
|
|
|
|
/* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
|
|
musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
|
|
|
|
/* Turn GPIO[5:0] to DMAREQ[5:0] signals */
|
|
musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
|
|
|
|
/* Burst size 16x16 bits, all six DMA requests enabled, DMA request
|
|
* de-assertion time 2 system clocks p 62 */
|
|
musb_writel(tbase, TUSB_DMA_REQ_CONF,
|
|
TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
|
|
TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
|
|
TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
|
|
|
|
/* Set 0 wait count for synchronous burst access */
|
|
musb_writel(tbase, TUSB_WAIT_COUNT, 1);
|
|
}
|
|
|
|
static int tusb_musb_start(struct musb *musb)
|
|
{
|
|
void __iomem *tbase = musb->ctrl_base;
|
|
int ret = 0;
|
|
unsigned long flags;
|
|
u32 reg;
|
|
|
|
if (musb->board_set_power)
|
|
ret = musb->board_set_power(1);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
|
|
return ret;
|
|
}
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
|
|
|
if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
|
|
TUSB_PROD_TEST_RESET_VAL) {
|
|
printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
|
|
goto err;
|
|
}
|
|
|
|
ret = tusb_print_revision(musb);
|
|
if (ret < 2) {
|
|
printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
|
|
ret);
|
|
goto err;
|
|
}
|
|
|
|
/* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
|
|
* NOR FLASH interface is used */
|
|
musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
|
|
|
|
/* Select PHY free running 60MHz as a system clock */
|
|
tusb_set_clock_source(musb, 1);
|
|
|
|
/* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
|
|
* power saving, enable VBus detect and session end comparators,
|
|
* enable IDpullup, enable VBus charging */
|
|
musb_writel(tbase, TUSB_PRCM_MNGMT,
|
|
TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
|
|
TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
|
|
TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
|
|
TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
|
|
TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
|
|
tusb_setup_cpu_interface(musb);
|
|
|
|
/* simplify: always sense/pullup ID pins, as if in OTG mode */
|
|
reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
|
|
reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
|
|
|
|
reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
|
|
reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
|
|
musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
|
|
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
|
|
if (musb->board_set_power)
|
|
musb->board_set_power(0);
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int tusb_musb_init(struct musb *musb)
|
|
{
|
|
struct platform_device *pdev;
|
|
struct resource *mem;
|
|
void __iomem *sync = NULL;
|
|
int ret;
|
|
|
|
usb_nop_xceiv_register();
|
|
musb->xceiv = usb_get_transceiver();
|
|
if (!musb->xceiv)
|
|
return -ENODEV;
|
|
|
|
pdev = to_platform_device(musb->controller);
|
|
|
|
/* dma address for async dma */
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
musb->async = mem->start;
|
|
|
|
/* dma address for sync dma */
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (!mem) {
|
|
pr_debug("no sync dma resource?\n");
|
|
ret = -ENODEV;
|
|
goto done;
|
|
}
|
|
musb->sync = mem->start;
|
|
|
|
sync = ioremap(mem->start, resource_size(mem));
|
|
if (!sync) {
|
|
pr_debug("ioremap for sync failed\n");
|
|
ret = -ENOMEM;
|
|
goto done;
|
|
}
|
|
musb->sync_va = sync;
|
|
|
|
/* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
|
|
* FIFOs at 0x600, TUSB at 0x800
|
|
*/
|
|
musb->mregs += TUSB_BASE_OFFSET;
|
|
|
|
ret = tusb_musb_start(musb);
|
|
if (ret) {
|
|
printk(KERN_ERR "Could not start tusb6010 (%d)\n",
|
|
ret);
|
|
goto done;
|
|
}
|
|
musb->isr = tusb_musb_interrupt;
|
|
|
|
if (is_peripheral_enabled(musb)) {
|
|
musb->xceiv->set_power = tusb_draw_power;
|
|
the_musb = musb;
|
|
}
|
|
|
|
setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
|
|
|
|
done:
|
|
if (ret < 0) {
|
|
if (sync)
|
|
iounmap(sync);
|
|
|
|
usb_put_transceiver(musb->xceiv);
|
|
usb_nop_xceiv_unregister();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int tusb_musb_exit(struct musb *musb)
|
|
{
|
|
del_timer_sync(&musb_idle_timer);
|
|
the_musb = NULL;
|
|
|
|
if (musb->board_set_power)
|
|
musb->board_set_power(0);
|
|
|
|
iounmap(musb->sync_va);
|
|
|
|
usb_put_transceiver(musb->xceiv);
|
|
usb_nop_xceiv_unregister();
|
|
return 0;
|
|
}
|
|
|
|
static const struct musb_platform_ops tusb_ops = {
|
|
.init = tusb_musb_init,
|
|
.exit = tusb_musb_exit,
|
|
|
|
.enable = tusb_musb_enable,
|
|
.disable = tusb_musb_disable,
|
|
|
|
.set_mode = tusb_musb_set_mode,
|
|
.try_idle = tusb_musb_try_idle,
|
|
|
|
.vbus_status = tusb_musb_vbus_status,
|
|
.set_vbus = tusb_musb_set_vbus,
|
|
};
|
|
|
|
static u64 tusb_dmamask = DMA_BIT_MASK(32);
|
|
|
|
static int __devinit tusb_probe(struct platform_device *pdev)
|
|
{
|
|
struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
|
|
struct platform_device *musb;
|
|
struct tusb6010_glue *glue;
|
|
|
|
int ret = -ENOMEM;
|
|
|
|
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
|
|
if (!glue) {
|
|
dev_err(&pdev->dev, "failed to allocate glue context\n");
|
|
goto err0;
|
|
}
|
|
|
|
musb = platform_device_alloc("musb-hdrc", -1);
|
|
if (!musb) {
|
|
dev_err(&pdev->dev, "failed to allocate musb device\n");
|
|
goto err1;
|
|
}
|
|
|
|
musb->dev.parent = &pdev->dev;
|
|
musb->dev.dma_mask = &tusb_dmamask;
|
|
musb->dev.coherent_dma_mask = tusb_dmamask;
|
|
|
|
glue->dev = &pdev->dev;
|
|
glue->musb = musb;
|
|
|
|
pdata->platform_ops = &tusb_ops;
|
|
|
|
platform_set_drvdata(pdev, glue);
|
|
|
|
ret = platform_device_add_resources(musb, pdev->resource,
|
|
pdev->num_resources);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to add resources\n");
|
|
goto err2;
|
|
}
|
|
|
|
ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to add platform_data\n");
|
|
goto err2;
|
|
}
|
|
|
|
ret = platform_device_add(musb);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register musb device\n");
|
|
goto err1;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
platform_device_put(musb);
|
|
|
|
err1:
|
|
kfree(glue);
|
|
|
|
err0:
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit tusb_remove(struct platform_device *pdev)
|
|
{
|
|
struct tusb6010_glue *glue = platform_get_drvdata(pdev);
|
|
|
|
platform_device_del(glue->musb);
|
|
platform_device_put(glue->musb);
|
|
kfree(glue);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tusb_driver = {
|
|
.probe = tusb_probe,
|
|
.remove = __devexit_p(tusb_remove),
|
|
.driver = {
|
|
.name = "musb-tusb",
|
|
},
|
|
};
|
|
|
|
MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
|
|
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
static int __init tusb_init(void)
|
|
{
|
|
return platform_driver_register(&tusb_driver);
|
|
}
|
|
module_init(tusb_init);
|
|
|
|
static void __exit tusb_exit(void)
|
|
{
|
|
platform_driver_unregister(&tusb_driver);
|
|
}
|
|
module_exit(tusb_exit);
|