443 lines
10 KiB
C
443 lines
10 KiB
C
|
/*
|
||
|
|
* B53 register access through Switch Register Access Bridge Registers
|
||
|
|
*
|
||
|
|
* Copyright (C) 2013 Hauke Mehrtens <hauke@hauke-m.de>
|
||
|
|
*
|
||
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
||
|
|
* purpose with or without fee is hereby granted, provided that the above
|
||
|
|
* copyright notice and this permission notice appear in all copies.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/platform_data/b53.h>
|
||
|
|
#include <linux/of.h>
|
||
|
|
|
||
|
|
#include "b53_priv.h"
|
||
|
|
|
||
|
|
/* command and status register of the SRAB */
|
||
|
|
#define B53_SRAB_CMDSTAT 0x2c
|
||
|
|
#define B53_SRAB_CMDSTAT_RST BIT(2)
|
||
|
|
#define B53_SRAB_CMDSTAT_WRITE BIT(1)
|
||
|
|
#define B53_SRAB_CMDSTAT_GORDYN BIT(0)
|
||
|
|
#define B53_SRAB_CMDSTAT_PAGE 24
|
||
|
|
#define B53_SRAB_CMDSTAT_REG 16
|
||
|
|
|
||
|
|
/* high order word of write data to switch registe */
|
||
|
|
#define B53_SRAB_WD_H 0x30
|
||
|
|
|
||
|
|
/* low order word of write data to switch registe */
|
||
|
|
#define B53_SRAB_WD_L 0x34
|
||
|
|
|
||
|
|
/* high order word of read data from switch register */
|
||
|
|
#define B53_SRAB_RD_H 0x38
|
||
|
|
|
||
|
|
/* low order word of read data from switch register */
|
||
|
|
#define B53_SRAB_RD_L 0x3c
|
||
|
|
|
||
|
|
/* command and status register of the SRAB */
|
||
|
|
#define B53_SRAB_CTRLS 0x40
|
||
|
|
#define B53_SRAB_CTRLS_RCAREQ BIT(3)
|
||
|
|
#define B53_SRAB_CTRLS_RCAGNT BIT(4)
|
||
|
|
#define B53_SRAB_CTRLS_SW_INIT_DONE BIT(6)
|
||
|
|
|
||
|
|
/* the register captures interrupt pulses from the switch */
|
||
|
|
#define B53_SRAB_INTR 0x44
|
||
|
|
#define B53_SRAB_INTR_P(x) BIT(x)
|
||
|
|
#define B53_SRAB_SWITCH_PHY BIT(8)
|
||
|
|
#define B53_SRAB_1588_SYNC BIT(9)
|
||
|
|
#define B53_SRAB_IMP1_SLEEP_TIMER BIT(10)
|
||
|
|
#define B53_SRAB_P7_SLEEP_TIMER BIT(11)
|
||
|
|
#define B53_SRAB_IMP0_SLEEP_TIMER BIT(12)
|
||
|
|
|
||
|
|
struct b53_srab_priv {
|
||
|
|
void __iomem *regs;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int b53_srab_request_grant(struct b53_device *dev)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
u32 ctrls;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
ctrls = readl(regs + B53_SRAB_CTRLS);
|
||
|
|
ctrls |= B53_SRAB_CTRLS_RCAREQ;
|
||
|
|
writel(ctrls, regs + B53_SRAB_CTRLS);
|
||
|
|
|
||
|
|
for (i = 0; i < 20; i++) {
|
||
|
|
ctrls = readl(regs + B53_SRAB_CTRLS);
|
||
|
|
if (ctrls & B53_SRAB_CTRLS_RCAGNT)
|
||
|
|
break;
|
||
|
|
usleep_range(10, 100);
|
||
|
|
}
|
||
|
|
if (WARN_ON(i == 5))
|
||
|
|
return -EIO;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void b53_srab_release_grant(struct b53_device *dev)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
u32 ctrls;
|
||
|
|
|
||
|
|
ctrls = readl(regs + B53_SRAB_CTRLS);
|
||
|
|
ctrls &= ~B53_SRAB_CTRLS_RCAREQ;
|
||
|
|
writel(ctrls, regs + B53_SRAB_CTRLS);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_op(struct b53_device *dev, u8 page, u8 reg, u32 op)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int i;
|
||
|
|
u32 cmdstat;
|
||
|
|
|
||
|
|
/* set register address */
|
||
|
|
cmdstat = (page << B53_SRAB_CMDSTAT_PAGE) |
|
||
|
|
(reg << B53_SRAB_CMDSTAT_REG) |
|
||
|
|
B53_SRAB_CMDSTAT_GORDYN |
|
||
|
|
op;
|
||
|
|
writel(cmdstat, regs + B53_SRAB_CMDSTAT);
|
||
|
|
|
||
|
|
/* check if operation completed */
|
||
|
|
for (i = 0; i < 5; ++i) {
|
||
|
|
cmdstat = readl(regs + B53_SRAB_CMDSTAT);
|
||
|
|
if (!(cmdstat & B53_SRAB_CMDSTAT_GORDYN))
|
||
|
|
break;
|
||
|
|
usleep_range(10, 100);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (WARN_ON(i == 5))
|
||
|
|
return -EIO;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, 0);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
*val = readl(regs + B53_SRAB_RD_L) & 0xff;
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_read16(struct b53_device *dev, u8 page, u8 reg, u16 *val)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, 0);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
*val = readl(regs + B53_SRAB_RD_L) & 0xffff;
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_read32(struct b53_device *dev, u8 page, u8 reg, u32 *val)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, 0);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
*val = readl(regs + B53_SRAB_RD_L);
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_read48(struct b53_device *dev, u8 page, u8 reg, u64 *val)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, 0);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
*val = readl(regs + B53_SRAB_RD_L);
|
||
|
|
*val += ((u64)readl(regs + B53_SRAB_RD_H) & 0xffff) << 32;
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_read64(struct b53_device *dev, u8 page, u8 reg, u64 *val)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, 0);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
*val = readl(regs + B53_SRAB_RD_L);
|
||
|
|
*val += (u64)readl(regs + B53_SRAB_RD_H) << 32;
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_write8(struct b53_device *dev, u8 page, u8 reg, u8 value)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
writel(value, regs + B53_SRAB_WD_L);
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_write16(struct b53_device *dev, u8 page, u8 reg,
|
||
|
|
u16 value)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
writel(value, regs + B53_SRAB_WD_L);
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_write32(struct b53_device *dev, u8 page, u8 reg,
|
||
|
|
u32 value)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
writel(value, regs + B53_SRAB_WD_L);
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_write48(struct b53_device *dev, u8 page, u8 reg,
|
||
|
|
u64 value)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
writel((u32)value, regs + B53_SRAB_WD_L);
|
||
|
|
writel((u16)(value >> 32), regs + B53_SRAB_WD_H);
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_write64(struct b53_device *dev, u8 page, u8 reg,
|
||
|
|
u64 value)
|
||
|
|
{
|
||
|
|
struct b53_srab_priv *priv = dev->priv;
|
||
|
|
u8 __iomem *regs = priv->regs;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
ret = b53_srab_request_grant(dev);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
writel((u32)value, regs + B53_SRAB_WD_L);
|
||
|
|
writel((u32)(value >> 32), regs + B53_SRAB_WD_H);
|
||
|
|
|
||
|
|
ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
|
||
|
|
|
||
|
|
err:
|
||
|
|
b53_srab_release_grant(dev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct b53_io_ops b53_srab_ops = {
|
||
|
|
.read8 = b53_srab_read8,
|
||
|
|
.read16 = b53_srab_read16,
|
||
|
|
.read32 = b53_srab_read32,
|
||
|
|
.read48 = b53_srab_read48,
|
||
|
|
.read64 = b53_srab_read64,
|
||
|
|
.write8 = b53_srab_write8,
|
||
|
|
.write16 = b53_srab_write16,
|
||
|
|
.write32 = b53_srab_write32,
|
||
|
|
.write48 = b53_srab_write48,
|
||
|
|
.write64 = b53_srab_write64,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct of_device_id b53_srab_of_match[] = {
|
||
|
|
{ .compatible = "brcm,bcm53010-srab" },
|
||
|
|
{ .compatible = "brcm,bcm53011-srab" },
|
||
|
|
{ .compatible = "brcm,bcm53012-srab" },
|
||
|
|
{ .compatible = "brcm,bcm53018-srab" },
|
||
|
|
{ .compatible = "brcm,bcm53019-srab" },
|
||
|
|
{ .compatible = "brcm,bcm5301x-srab" },
|
||
|
|
{ .compatible = "brcm,bcm58522-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ .compatible = "brcm,bcm58525-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ .compatible = "brcm,bcm58535-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ .compatible = "brcm,bcm58622-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ .compatible = "brcm,bcm58623-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ .compatible = "brcm,bcm58625-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ .compatible = "brcm,bcm88312-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ .compatible = "brcm,nsp-srab", .data = (void *)BCM58XX_DEVICE_ID },
|
||
|
|
{ /* sentinel */ },
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, b53_srab_of_match);
|
||
|
|
|
||
|
|
static int b53_srab_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct b53_platform_data *pdata = pdev->dev.platform_data;
|
||
|
|
struct device_node *dn = pdev->dev.of_node;
|
||
|
|
const struct of_device_id *of_id = NULL;
|
||
|
|
struct b53_srab_priv *priv;
|
||
|
|
struct b53_device *dev;
|
||
|
|
struct resource *r;
|
||
|
|
|
||
|
|
if (dn)
|
||
|
|
of_id = of_match_node(b53_srab_of_match, dn);
|
||
|
|
|
||
|
|
if (of_id) {
|
||
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
||
|
|
if (!pdata)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
pdata->chip_id = (u32)(unsigned long)of_id->data;
|
||
|
|
}
|
||
|
|
|
||
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
||
|
|
if (!priv)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||
|
|
priv->regs = devm_ioremap_resource(&pdev->dev, r);
|
||
|
|
if (IS_ERR(priv->regs))
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
dev = b53_switch_alloc(&pdev->dev, &b53_srab_ops, priv);
|
||
|
|
if (!dev)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
if (pdata)
|
||
|
|
dev->pdata = pdata;
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, dev);
|
||
|
|
|
||
|
|
return b53_switch_register(dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int b53_srab_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct b53_device *dev = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
if (dev)
|
||
|
|
b53_switch_remove(dev);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver b53_srab_driver = {
|
||
|
|
.probe = b53_srab_probe,
|
||
|
|
.remove = b53_srab_remove,
|
||
|
|
.driver = {
|
||
|
|
.name = "b53-srab-switch",
|
||
|
|
.of_match_table = b53_srab_of_match,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver(b53_srab_driver);
|
||
|
|
MODULE_AUTHOR("Hauke Mehrtens <hauke@hauke-m.de>");
|
||
|
|
MODULE_DESCRIPTION("B53 Switch Register Access Bridge Registers (SRAB) access driver");
|
||
|
|
MODULE_LICENSE("Dual BSD/GPL");
|