mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
76eff170bb
In device tree environment, the previous code allocates renesas_usbhs_platform_info by using devm_kzalloc() and then copies usbhs_of_data to the allocated memory. This reason is some values (e.g. .platform_callback.get_vbus) are overwritten by the driver, but the of_device_id.data is "const". Now the driver doesn't have such a code, so this patch uses renesas_usbhs_platform_info on of_device_id.data. Note that the previous code set the pdev->dev.platform_data pointer even if device tree environment, but the value is not used. So, this patch also remove such a code. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
3 KiB
C
120 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Renesas USB driver R-Car Gen. 3 initialization and power control
|
|
*
|
|
* Copyright (C) 2016-2019 Renesas Electronics Corporation
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/io.h>
|
|
#include "common.h"
|
|
#include "rcar3.h"
|
|
|
|
#define LPSTS 0x102
|
|
#define UGCTRL 0x180 /* 32-bit register */
|
|
#define UGCTRL2 0x184 /* 32-bit register */
|
|
#define UGSTS 0x188 /* 32-bit register */
|
|
|
|
/* Low Power Status register (LPSTS) */
|
|
#define LPSTS_SUSPM 0x4000
|
|
|
|
/* R-Car D3 only: USB General control register (UGCTRL) */
|
|
#define UGCTRL_PLLRESET 0x00000001
|
|
#define UGCTRL_CONNECT 0x00000004
|
|
|
|
/*
|
|
* USB General control register 2 (UGCTRL2)
|
|
* Remarks: bit[31:11] and bit[9:6] should be 0
|
|
*/
|
|
#define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */
|
|
#define UGCTRL2_USB0SEL_HSUSB 0x00000020
|
|
#define UGCTRL2_USB0SEL_OTG 0x00000030
|
|
#define UGCTRL2_VBUSSEL 0x00000400
|
|
|
|
/* R-Car D3 only: USB General status register (UGSTS) */
|
|
#define UGSTS_LOCK 0x00000100
|
|
|
|
static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data)
|
|
{
|
|
iowrite32(data, priv->base + reg);
|
|
}
|
|
|
|
static u32 usbhs_read32(struct usbhs_priv *priv, u32 reg)
|
|
{
|
|
return ioread32(priv->base + reg);
|
|
}
|
|
|
|
static void usbhs_rcar3_set_ugctrl2(struct usbhs_priv *priv, u32 val)
|
|
{
|
|
usbhs_write32(priv, UGCTRL2, val | UGCTRL2_RESERVED_3);
|
|
}
|
|
|
|
static int usbhs_rcar3_power_ctrl(struct platform_device *pdev,
|
|
void __iomem *base, int enable)
|
|
{
|
|
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
|
|
|
|
usbhs_rcar3_set_ugctrl2(priv, UGCTRL2_USB0SEL_OTG | UGCTRL2_VBUSSEL);
|
|
|
|
if (enable) {
|
|
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
|
|
/* The controller on R-Car Gen3 needs to wait up to 45 usec */
|
|
usleep_range(45, 90);
|
|
} else {
|
|
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* R-Car D3 needs to release UGCTRL.PLLRESET */
|
|
static int usbhs_rcar3_power_and_pll_ctrl(struct platform_device *pdev,
|
|
void __iomem *base, int enable)
|
|
{
|
|
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
|
|
u32 val;
|
|
int timeout = 1000;
|
|
|
|
if (enable) {
|
|
usbhs_write32(priv, UGCTRL, 0); /* release PLLRESET */
|
|
usbhs_rcar3_set_ugctrl2(priv,
|
|
UGCTRL2_USB0SEL_OTG | UGCTRL2_VBUSSEL);
|
|
|
|
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
|
|
do {
|
|
val = usbhs_read32(priv, UGSTS);
|
|
udelay(1);
|
|
} while (!(val & UGSTS_LOCK) && timeout--);
|
|
usbhs_write32(priv, UGCTRL, UGCTRL_CONNECT);
|
|
} else {
|
|
usbhs_write32(priv, UGCTRL, 0);
|
|
usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
|
|
usbhs_write32(priv, UGCTRL, UGCTRL_PLLRESET);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct renesas_usbhs_platform_info usbhs_rcar_gen3_plat_info = {
|
|
.platform_callback = {
|
|
.power_ctrl = usbhs_rcar3_power_ctrl,
|
|
.get_id = usbhs_get_id_as_gadget,
|
|
},
|
|
.driver_param = {
|
|
.has_usb_dmac = 1,
|
|
.multi_clks = 1,
|
|
.has_new_pipe_configs = 1,
|
|
},
|
|
};
|
|
|
|
const struct renesas_usbhs_platform_info usbhs_rcar_gen3_with_pll_plat_info = {
|
|
.platform_callback = {
|
|
.power_ctrl = usbhs_rcar3_power_and_pll_ctrl,
|
|
.get_id = usbhs_get_id_as_gadget,
|
|
},
|
|
.driver_param = {
|
|
.has_usb_dmac = 1,
|
|
.multi_clks = 1,
|
|
.has_new_pipe_configs = 1,
|
|
},
|
|
};
|