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usb: phy: ab8500-usb: add ab9540 support

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Add support for the ab9540 variant of the ab8500 family.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Cc: Avinash Kumar <avinash.kumar@stericsson.com>
Cc: Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Fabio Baltieri 2013-05-15 14:03:33 +02:00 committed by Felipe Balbi
parent 0c380c0ee0
commit f85bff5d1e
1 changed files with 213 additions and 0 deletions
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213
drivers/usb/phy/phy-ab8500-usb.c
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@ -6,6 +6,7 @@
* Copyright (C) 2010-2013 ST-Ericsson AB
* Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
* Avinash Kumar <avinash.kumar@stericsson.com>
* Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com>
*
* 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
@ -45,6 +46,7 @@
#define AB8500_USB_LINE_STAT_REG 0x80
#define AB8505_USB_LINE_STAT_REG 0x94
#define AB8540_USB_LINK_STAT_REG 0x94
#define AB9540_USB_LINK_STAT_REG 0x94
#define AB8540_USB_OTG_CTL_REG 0x87
#define AB8500_USB_PHY_CTRL_REG 0x8A
#define AB8540_VBUS_CTRL_REG 0x82
@ -158,6 +160,37 @@ enum ab8540_usb_link_status {
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8540
};
enum ab9540_usb_link_status {
USB_LINK_NOT_CONFIGURED_9540 = 0,
USB_LINK_STD_HOST_NC_9540,
USB_LINK_STD_HOST_C_NS_9540,
USB_LINK_STD_HOST_C_S_9540,
USB_LINK_CDP_9540,
USB_LINK_RESERVED0_9540,
USB_LINK_RESERVED1_9540,
USB_LINK_DEDICATED_CHG_9540,
USB_LINK_ACA_RID_A_9540,
USB_LINK_ACA_RID_B_9540,
USB_LINK_ACA_RID_C_NM_9540,
USB_LINK_RESERVED2_9540,
USB_LINK_RESERVED3_9540,
USB_LINK_HM_IDGND_9540,
USB_LINK_CHARGERPORT_NOT_OK_9540,
USB_LINK_CHARGER_DM_HIGH_9540,
USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540,
USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540,
USB_LINK_STD_UPSTREAM_9540,
USB_LINK_CHARGER_SE1_9540,
USB_LINK_CARKIT_CHGR_1_9540,
USB_LINK_CARKIT_CHGR_2_9540,
USB_LINK_ACA_DOCK_CHGR_9540,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_9540,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_9540,
USB_LINK_SAMSUNG_UART_CBL_PHY_EN_9540,
USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_9540,
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_9540
};
enum ab8500_usb_mode {
USB_IDLE = 0,
USB_PERIPHERAL,
@ -378,6 +411,132 @@ static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false)
#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false)
static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
enum ab9540_usb_link_status lsts)
{
enum ux500_musb_vbus_id_status event = 0;
dev_dbg(ab->dev, "ab9540_usb_link_status_update %d\n", lsts);
if (ab->previous_link_status_state == USB_LINK_HM_IDGND_9540 &&
(lsts == USB_LINK_STD_HOST_C_NS_9540 ||
lsts == USB_LINK_STD_HOST_NC_9540))
return 0;
if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_9540 &&
(lsts == USB_LINK_STD_HOST_NC_9540))
return 0;
ab->previous_link_status_state = lsts;
switch (lsts) {
case USB_LINK_ACA_RID_B_9540:
event = UX500_MUSB_RIDB;
case USB_LINK_NOT_CONFIGURED_9540:
case USB_LINK_RESERVED0_9540:
case USB_LINK_RESERVED1_9540:
case USB_LINK_RESERVED2_9540:
case USB_LINK_RESERVED3_9540:
if (ab->mode == USB_PERIPHERAL)
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_CLEAN, &ab->vbus_draw);
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
if (event != UX500_MUSB_RIDB)
event = UX500_MUSB_NONE;
/* Fallback to default B_IDLE as nothing is connected. */
ab->phy.state = OTG_STATE_B_IDLE;
break;
case USB_LINK_ACA_RID_C_NM_9540:
event = UX500_MUSB_RIDC;
case USB_LINK_STD_HOST_NC_9540:
case USB_LINK_STD_HOST_C_NS_9540:
case USB_LINK_STD_HOST_C_S_9540:
case USB_LINK_CDP_9540:
if (ab->mode == USB_HOST) {
ab->mode = USB_PERIPHERAL;
ab8500_usb_host_phy_dis(ab);
ab8500_usb_peri_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
if (ab->mode == USB_IDLE) {
ab->mode = USB_PERIPHERAL;
ab8500_usb_peri_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
if (event != UX500_MUSB_RIDC)
event = UX500_MUSB_VBUS;
break;
case USB_LINK_ACA_RID_A_9540:
event = UX500_MUSB_RIDA;
case USB_LINK_HM_IDGND_9540:
case USB_LINK_STD_UPSTREAM_9540:
if (ab->mode == USB_PERIPHERAL) {
ab->mode = USB_HOST;
ab8500_usb_peri_phy_dis(ab);
ab8500_usb_host_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
if (ab->mode == USB_IDLE) {
ab->mode = USB_HOST;
ab8500_usb_host_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
ab->phy.otg->default_a = true;
if (event != UX500_MUSB_RIDA)
event = UX500_MUSB_ID;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
break;
case USB_LINK_DEDICATED_CHG_9540:
ab->mode = USB_DEDICATED_CHG;
event = UX500_MUSB_CHARGER;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
break;
case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540:
case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540:
if (!(is_ab9540_2p0_or_earlier(ab->ab8500))) {
event = UX500_MUSB_NONE;
if (ab->mode == USB_HOST) {
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_host_phy_dis(ab);
ab->mode = USB_IDLE;
}
if (ab->mode == USB_PERIPHERAL) {
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_peri_phy_dis(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_CLEAN,
&ab->vbus_draw);
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
}
}
break;
default:
break;
}
return 0;
}
static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
enum ab8540_usb_link_status lsts)
{
@ -707,6 +866,13 @@ static int abx500_usb_link_status_update(struct ab8500_usb *ab)
AB8500_USB, AB8540_USB_LINK_STAT_REG, &reg);
lsts = (reg >> 3) & 0xFF;
ret = ab8540_usb_link_status_update(ab, lsts);
} else if (is_ab9540(ab->ab8500)) {
enum ab9540_usb_link_status lsts;
abx500_get_register_interruptible(ab->dev,
AB8500_USB, AB9540_USB_LINK_STAT_REG, &reg);
lsts = (reg >> 3) & 0xFF;
ret = ab9540_usb_link_status_update(ab, lsts);
}
return ret;
@ -1146,6 +1312,43 @@ static void ab8500_usb_set_ab8540_tuning_values(struct ab8500_usb *ab)
err);
}
static void ab8500_usb_set_ab9540_tuning_values(struct ab8500_usb *ab)
{
int err;
/* Enable the PBT/Bank 0x12 access */
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
if (err < 0)
dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x60);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x80);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
err);
/* Switch to normal mode/disable Bank 0x12 access */
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
if (err < 0)
dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
err);
}
static int ab8500_usb_probe(struct platform_device *pdev)
{
struct ab8500_usb *ab;
@ -1198,6 +1401,12 @@ static int ab8500_usb_probe(struct platform_device *pdev)
AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS |
AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK |
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
} else if (is_ab9540(ab->ab8500)) {
ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
if (is_ab9540_2p0_or_earlier(ab->ab8500))
ab->flags |= AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
AB8500_USB_FLAG_USE_VBUS_DET_IRQ;
}
/* Disable regulator voltage setting for AB8500 <= v2.0 */
@ -1242,6 +1451,9 @@ static int ab8500_usb_probe(struct platform_device *pdev)
else if (is_ab8540(ab->ab8500))
/* Phy tuning values for AB8540 */
ab8500_usb_set_ab8540_tuning_values(ab);
else if (is_ab9540(ab->ab8500))
/* Phy tuning values for AB9540 */
ab8500_usb_set_ab9540_tuning_values(ab);
/* Needed to enable ID detection. */
ab8500_usb_wd_workaround(ab);
@ -1284,6 +1496,7 @@ static int ab8500_usb_remove(struct platform_device *pdev)
static struct platform_device_id ab8500_usb_devtype[] = {
{ .name = "ab8500-usb", },
{ .name = "ab8540-usb", },
{ .name = "ab9540-usb", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype);