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|
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for the NXP ISP1760 chip
*
* Copyright 2014 Laurent Pinchart
* Copyright 2007 Sebastian Siewior
*
* Contacts:
* Sebastian Siewior <bigeasy@linutronix.de>
* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include "isp1760-core.h"
#include "isp1760-hcd.h"
#include "isp1760-regs.h"
#include "isp1760-udc.h"
static void isp1760_init_core(struct isp1760_device *isp)
{
struct isp1760_hcd *hcd = &isp->hcd;
struct isp1760_udc *udc = &isp->udc;
/* Low-level chip reset */
if (isp->rst_gpio) {
gpiod_set_value_cansleep(isp->rst_gpio, 1);
msleep(50);
gpiod_set_value_cansleep(isp->rst_gpio, 0);
}
/*
* Reset the host controller, including the CPU interface
* configuration.
*/
isp1760_field_set(hcd->fields, SW_RESET_RESET_ALL);
msleep(100);
/* Setup HW Mode Control: This assumes a level active-low interrupt */
if (isp->devflags & ISP1760_FLAG_BUS_WIDTH_16)
isp1760_field_clear(hcd->fields, HW_DATA_BUS_WIDTH);
if (isp->devflags & ISP1760_FLAG_ANALOG_OC)
isp1760_field_set(hcd->fields, HW_ANA_DIGI_OC);
if (isp->devflags & ISP1760_FLAG_DACK_POL_HIGH)
isp1760_field_set(hcd->fields, HW_DACK_POL_HIGH);
if (isp->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
isp1760_field_set(hcd->fields, HW_DREQ_POL_HIGH);
if (isp->devflags & ISP1760_FLAG_INTR_POL_HIGH)
isp1760_field_set(hcd->fields, HW_INTR_HIGH_ACT);
if (isp->devflags & ISP1760_FLAG_INTR_EDGE_TRIG)
isp1760_field_set(hcd->fields, HW_INTR_EDGE_TRIG);
/*
* The ISP1761 has a dedicated DC IRQ line but supports sharing the HC
* IRQ line for both the host and device controllers. Hardcode IRQ
* sharing for now and disable the DC interrupts globally to avoid
* spurious interrupts during HCD registration.
*/
if (isp->devflags & ISP1760_FLAG_ISP1761) {
isp1760_reg_write(udc->regs, ISP176x_DC_MODE, 0);
isp1760_field_set(hcd->fields, HW_COMN_IRQ);
}
/*
* PORT 1 Control register of the ISP1760 is the OTG control register
* on ISP1761.
*
* TODO: Really support OTG. For now we configure port 1 in device mode
* when OTG is requested.
*/
if ((isp->devflags & ISP1760_FLAG_ISP1761) &&
(isp->devflags & ISP1760_FLAG_OTG_EN)) {
isp1760_field_set(hcd->fields, HW_DM_PULLDOWN);
isp1760_field_set(hcd->fields, HW_DP_PULLDOWN);
isp1760_field_set(hcd->fields, HW_OTG_DISABLE);
} else {
isp1760_field_set(hcd->fields, HW_SW_SEL_HC_DC);
isp1760_field_set(hcd->fields, HW_VBUS_DRV);
isp1760_field_set(hcd->fields, HW_SEL_CP_EXT);
}
dev_info(isp->dev, "bus width: %u, oc: %s\n",
isp->devflags & ISP1760_FLAG_BUS_WIDTH_16 ? 16 : 32,
isp->devflags & ISP1760_FLAG_ANALOG_OC ? "analog" : "digital");
}
void isp1760_set_pullup(struct isp1760_device *isp, bool enable)
{
struct isp1760_udc *udc = &isp->udc;
if (enable)
isp1760_field_set(udc->fields, HW_DP_PULLUP);
else
isp1760_field_set(udc->fields, HW_DP_PULLUP_CLEAR);
}
/*
* 60kb divided in:
* - 32 blocks @ 256 bytes
* - 20 blocks @ 1024 bytes
* - 4 blocks @ 8192 bytes
*/
static const struct isp1760_memory_layout isp176x_memory_conf = {
.blocks[0] = 32,
.blocks_size[0] = 256,
.blocks[1] = 20,
.blocks_size[1] = 1024,
.blocks[2] = 4,
.blocks_size[2] = 8192,
.ptd_num = 32,
.payload_blocks = 32 + 20 + 4,
.payload_area_size = 0xf000,
};
static const struct regmap_range isp176x_hc_volatile_ranges[] = {
regmap_reg_range(ISP176x_HC_USBCMD, ISP176x_HC_ATL_PTD_LASTPTD),
regmap_reg_range(ISP176x_HC_BUFFER_STATUS, ISP176x_HC_MEMORY),
regmap_reg_range(ISP176x_HC_INTERRUPT, ISP176x_HC_ATL_IRQ_MASK_AND),
};
static const struct regmap_access_table isp176x_hc_volatile_table = {
.yes_ranges = isp176x_hc_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(isp176x_hc_volatile_ranges),
};
static struct regmap_config isp1760_hc_regmap_conf = {
.name = "isp1760-hc",
.reg_bits = 16,
.reg_stride = 4,
.val_bits = 32,
.fast_io = true,
.max_register = ISP176x_HC_MEMORY,
.volatile_table = &isp176x_hc_volatile_table,
};
static const struct reg_field isp1760_hc_reg_fields[] = {
[HCS_PPC] = REG_FIELD(ISP176x_HC_HCSPARAMS, 4, 4),
[HCS_N_PORTS] = REG_FIELD(ISP176x_HC_HCSPARAMS, 0, 3),
[HCC_ISOC_CACHE] = REG_FIELD(ISP176x_HC_HCCPARAMS, 7, 7),
[HCC_ISOC_THRES] = REG_FIELD(ISP176x_HC_HCCPARAMS, 4, 6),
[CMD_LRESET] = REG_FIELD(ISP176x_HC_USBCMD, 7, 7),
[CMD_RESET] = REG_FIELD(ISP176x_HC_USBCMD, 1, 1),
[CMD_RUN] = REG_FIELD(ISP176x_HC_USBCMD, 0, 0),
[STS_PCD] = REG_FIELD(ISP176x_HC_USBSTS, 2, 2),
[HC_FRINDEX] = REG_FIELD(ISP176x_HC_FRINDEX, 0, 13),
[FLAG_CF] = REG_FIELD(ISP176x_HC_CONFIGFLAG, 0, 0),
[PORT_OWNER] = REG_FIELD(ISP176x_HC_PORTSC1, 13, 13),
[PORT_POWER] = REG_FIELD(ISP176x_HC_PORTSC1, 12, 12),
[PORT_LSTATUS] = REG_FIELD(ISP176x_HC_PORTSC1, 10, 11),
[PORT_RESET] = REG_FIELD(ISP176x_HC_PORTSC1, 8, 8),
[PORT_SUSPEND] = REG_FIELD(ISP176x_HC_PORTSC1, 7, 7),
[PORT_RESUME] = REG_FIELD(ISP176x_HC_PORTSC1, 6, 6),
[PORT_PE] = REG_FIELD(ISP176x_HC_PORTSC1, 2, 2),
[PORT_CSC] = REG_FIELD(ISP176x_HC_PORTSC1, 1, 1),
[PORT_CONNECT] = REG_FIELD(ISP176x_HC_PORTSC1, 0, 0),
[ALL_ATX_RESET] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 31, 31),
[HW_ANA_DIGI_OC] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 15, 15),
[HW_COMN_IRQ] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 10, 10),
[HW_DATA_BUS_WIDTH] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 8, 8),
[HW_DACK_POL_HIGH] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 6, 6),
[HW_DREQ_POL_HIGH] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 5, 5),
[HW_INTR_HIGH_ACT] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 2, 2),
[HW_INTR_EDGE_TRIG] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 1, 1),
[HW_GLOBAL_INTR_EN] = REG_FIELD(ISP176x_HC_HW_MODE_CTRL, 0, 0),
[SW_RESET_RESET_ALL] = REG_FIELD(ISP176x_HC_RESET, 0, 0),
[INT_BUF_FILL] = REG_FIELD(ISP176x_HC_BUFFER_STATUS, 1, 1),
[ATL_BUF_FILL] = REG_FIELD(ISP176x_HC_BUFFER_STATUS, 0, 0),
[MEM_BANK_SEL] = REG_FIELD(ISP176x_HC_MEMORY, 16, 17),
[MEM_START_ADDR] = REG_FIELD(ISP176x_HC_MEMORY, 0, 15),
[HC_INT_ENABLE] = REG_FIELD(ISP176x_HC_INTERRUPT_ENABLE, 7, 8),
};
static const struct regmap_range isp176x_dc_volatile_ranges[] = {
regmap_reg_range(ISP176x_DC_EPMAXPKTSZ, ISP176x_DC_EPTYPE),
regmap_reg_range(ISP176x_DC_BUFLEN, ISP176x_DC_EPINDEX),
regmap_reg_range(ISP1761_DC_OTG_CTRL_SET, ISP1761_DC_OTG_CTRL_CLEAR),
};
static const struct regmap_access_table isp176x_dc_volatile_table = {
.yes_ranges = isp176x_dc_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(isp176x_dc_volatile_ranges),
};
static struct regmap_config isp1761_dc_regmap_conf = {
.name = "isp1761-dc",
.reg_bits = 16,
.reg_stride = 4,
.val_bits = 32,
.fast_io = true,
.max_register = ISP1761_DC_OTG_CTRL_CLEAR,
.volatile_table = &isp176x_dc_volatile_table,
};
static const struct reg_field isp1761_dc_reg_fields[] = {
[DC_DEVEN] = REG_FIELD(ISP176x_DC_ADDRESS, 7, 7),
[DC_DEVADDR] = REG_FIELD(ISP176x_DC_ADDRESS, 0, 6),
[DC_VBUSSTAT] = REG_FIELD(ISP176x_DC_MODE, 8, 8),
[DC_SFRESET] = REG_FIELD(ISP176x_DC_MODE, 4, 4),
[DC_GLINTENA] = REG_FIELD(ISP176x_DC_MODE, 3, 3),
[DC_CDBGMOD_ACK] = REG_FIELD(ISP176x_DC_INTCONF, 6, 6),
[DC_DDBGMODIN_ACK] = REG_FIELD(ISP176x_DC_INTCONF, 4, 4),
[DC_DDBGMODOUT_ACK] = REG_FIELD(ISP176x_DC_INTCONF, 2, 2),
[DC_INTPOL] = REG_FIELD(ISP176x_DC_INTCONF, 0, 0),
[DC_IEPRXTX_7] = REG_FIELD(ISP176x_DC_INTENABLE, 25, 25),
[DC_IEPRXTX_6] = REG_FIELD(ISP176x_DC_INTENABLE, 23, 23),
[DC_IEPRXTX_5] = REG_FIELD(ISP176x_DC_INTENABLE, 21, 21),
[DC_IEPRXTX_4] = REG_FIELD(ISP176x_DC_INTENABLE, 19, 19),
[DC_IEPRXTX_3] = REG_FIELD(ISP176x_DC_INTENABLE, 17, 17),
[DC_IEPRXTX_2] = REG_FIELD(ISP176x_DC_INTENABLE, 15, 15),
[DC_IEPRXTX_1] = REG_FIELD(ISP176x_DC_INTENABLE, 13, 13),
[DC_IEPRXTX_0] = REG_FIELD(ISP176x_DC_INTENABLE, 11, 11),
[DC_IEP0SETUP] = REG_FIELD(ISP176x_DC_INTENABLE, 8, 8),
[DC_IEVBUS] = REG_FIELD(ISP176x_DC_INTENABLE, 7, 7),
[DC_IEHS_STA] = REG_FIELD(ISP176x_DC_INTENABLE, 5, 5),
[DC_IERESM] = REG_FIELD(ISP176x_DC_INTENABLE, 4, 4),
[DC_IESUSP] = REG_FIELD(ISP176x_DC_INTENABLE, 3, 3),
[DC_IEBRST] = REG_FIELD(ISP176x_DC_INTENABLE, 0, 0),
[DC_EP0SETUP] = REG_FIELD(ISP176x_DC_EPINDEX, 5, 5),
[DC_ENDPIDX] = REG_FIELD(ISP176x_DC_EPINDEX, 1, 4),
[DC_EPDIR] = REG_FIELD(ISP176x_DC_EPINDEX, 0, 0),
[DC_CLBUF] = REG_FIELD(ISP176x_DC_CTRLFUNC, 4, 4),
[DC_VENDP] = REG_FIELD(ISP176x_DC_CTRLFUNC, 3, 3),
[DC_DSEN] = REG_FIELD(ISP176x_DC_CTRLFUNC, 2, 2),
[DC_STATUS] = REG_FIELD(ISP176x_DC_CTRLFUNC, 1, 1),
[DC_STALL] = REG_FIELD(ISP176x_DC_CTRLFUNC, 0, 0),
[DC_BUFLEN] = REG_FIELD(ISP176x_DC_BUFLEN, 0, 15),
[DC_FFOSZ] = REG_FIELD(ISP176x_DC_EPMAXPKTSZ, 0, 10),
[DC_EPENABLE] = REG_FIELD(ISP176x_DC_EPTYPE, 3, 3),
[DC_ENDPTYP] = REG_FIELD(ISP176x_DC_EPTYPE, 0, 1),
[DC_UFRAMENUM] = REG_FIELD(ISP176x_DC_FRAMENUM, 11, 13),
[DC_FRAMENUM] = REG_FIELD(ISP176x_DC_FRAMENUM, 0, 10),
[HW_OTG_DISABLE] = REG_FIELD(ISP1761_DC_OTG_CTRL_SET, 10, 10),
[HW_SW_SEL_HC_DC] = REG_FIELD(ISP1761_DC_OTG_CTRL_SET, 7, 7),
[HW_VBUS_DRV] = REG_FIELD(ISP1761_DC_OTG_CTRL_SET, 4, 4),
[HW_SEL_CP_EXT] = REG_FIELD(ISP1761_DC_OTG_CTRL_SET, 3, 3),
[HW_DM_PULLDOWN] = REG_FIELD(ISP1761_DC_OTG_CTRL_SET, 2, 2),
[HW_DP_PULLDOWN] = REG_FIELD(ISP1761_DC_OTG_CTRL_SET, 1, 1),
[HW_DP_PULLUP] = REG_FIELD(ISP1761_DC_OTG_CTRL_SET, 0, 0),
[HW_OTG_DISABLE_CLEAR] = REG_FIELD(ISP1761_DC_OTG_CTRL_CLEAR, 10, 10),
[HW_SW_SEL_HC_DC_CLEAR] = REG_FIELD(ISP1761_DC_OTG_CTRL_CLEAR, 7, 7),
[HW_VBUS_DRV_CLEAR] = REG_FIELD(ISP1761_DC_OTG_CTRL_CLEAR, 4, 4),
[HW_SEL_CP_EXT_CLEAR] = REG_FIELD(ISP1761_DC_OTG_CTRL_CLEAR, 3, 3),
[HW_DM_PULLDOWN_CLEAR] = REG_FIELD(ISP1761_DC_OTG_CTRL_CLEAR, 2, 2),
[HW_DP_PULLDOWN_CLEAR] = REG_FIELD(ISP1761_DC_OTG_CTRL_CLEAR, 1, 1),
[HW_DP_PULLUP_CLEAR] = REG_FIELD(ISP1761_DC_OTG_CTRL_CLEAR, 0, 0),
};
int isp1760_register(struct resource *mem, int irq, unsigned long irqflags,
struct device *dev, unsigned int devflags)
{
struct isp1760_device *isp;
struct isp1760_hcd *hcd;
struct isp1760_udc *udc;
bool udc_disabled = !(devflags & ISP1760_FLAG_ISP1761);
struct regmap_field *f;
void __iomem *base;
int ret;
int i;
/*
* If neither the HCD not the UDC is enabled return an error, as no
* device would be registered.
*/
if ((!IS_ENABLED(CONFIG_USB_ISP1760_HCD) || usb_disabled()) &&
(!IS_ENABLED(CONFIG_USB_ISP1761_UDC) || udc_disabled))
return -ENODEV;
isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
if (!isp)
return -ENOMEM;
isp->dev = dev;
isp->devflags = devflags;
hcd = &isp->hcd;
udc = &isp->udc;
if (devflags & ISP1760_FLAG_BUS_WIDTH_16) {
isp1760_hc_regmap_conf.val_bits = 16;
isp1761_dc_regmap_conf.val_bits = 16;
}
isp->rst_gpio = devm_gpiod_get_optional(dev, NULL, GPIOD_OUT_HIGH);
if (IS_ERR(isp->rst_gpio))
return PTR_ERR(isp->rst_gpio);
hcd->base = devm_ioremap_resource(dev, mem);
if (IS_ERR(hcd->base))
return PTR_ERR(hcd->base);
hcd->regs = devm_regmap_init_mmio(dev, base, &isp1760_hc_regmap_conf);
if (IS_ERR(hcd->regs))
return PTR_ERR(hcd->regs);
for (i = 0; i < HC_FIELD_MAX; i++) {
f = devm_regmap_field_alloc(dev, hcd->regs,
isp1760_hc_reg_fields[i]);
if (IS_ERR(f))
return PTR_ERR(f);
hcd->fields[i] = f;
}
udc->regs = devm_regmap_init_mmio(dev, base, &isp1761_dc_regmap_conf);
if (IS_ERR(udc->regs))
return PTR_ERR(udc->regs);
for (i = 0; i < DC_FIELD_MAX; i++) {
f = devm_regmap_field_alloc(dev, udc->regs,
isp1761_dc_reg_fields[i]);
if (IS_ERR(f))
return PTR_ERR(f);
udc->fields[i] = f;
}
hcd->memory_layout = &isp176x_memory_conf;
isp1760_init_core(isp);
if (IS_ENABLED(CONFIG_USB_ISP1760_HCD) && !usb_disabled()) {
ret = isp1760_hcd_register(hcd, mem, irq,
irqflags | IRQF_SHARED, dev);
if (ret < 0)
return ret;
}
if (IS_ENABLED(CONFIG_USB_ISP1761_UDC) && !udc_disabled) {
ret = isp1760_udc_register(isp, irq, irqflags);
if (ret < 0) {
isp1760_hcd_unregister(hcd);
return ret;
}
}
dev_set_drvdata(dev, isp);
return 0;
}
void isp1760_unregister(struct device *dev)
{
struct isp1760_device *isp = dev_get_drvdata(dev);
isp1760_udc_unregister(isp);
isp1760_hcd_unregister(&isp->hcd);
}
MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
MODULE_LICENSE("GPL v2");
|
