mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
f56f4ba2fc
Use the wrapper function for getting the driver data using pci_dev instead of using dev_get_drvdata() with &pdev->dev, so we can directly pass a struct pci_dev. This is a purely cosmetic change. Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
374 lines
9.1 KiB
C
374 lines
9.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Synopsys DesignWare I2C adapter driver (master only).
|
|
*
|
|
* Based on the TI DAVINCI I2C adapter driver.
|
|
*
|
|
* Copyright (C) 2006 Texas Instruments.
|
|
* Copyright (C) 2007 MontaVista Software Inc.
|
|
* Copyright (C) 2009 Provigent Ltd.
|
|
* Copyright (C) 2011, 2015, 2016 Intel Corporation.
|
|
*/
|
|
#include <linux/delay.h>
|
|
#include <linux/err.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/power_supply.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "i2c-designware-core.h"
|
|
#include "i2c-ccgx-ucsi.h"
|
|
|
|
#define DRIVER_NAME "i2c-designware-pci"
|
|
|
|
enum dw_pci_ctl_id_t {
|
|
medfield,
|
|
merrifield,
|
|
baytrail,
|
|
cherrytrail,
|
|
haswell,
|
|
elkhartlake,
|
|
navi_amd,
|
|
};
|
|
|
|
/*
|
|
* This is a legacy structure to describe the hardware counters
|
|
* to configure signal timings on the bus. For Device Tree platforms
|
|
* one should use the respective properties and for ACPI there is
|
|
* a set of ACPI methods that provide these counters. No new
|
|
* platform should use this structure.
|
|
*/
|
|
struct dw_scl_sda_cfg {
|
|
u16 ss_hcnt;
|
|
u16 fs_hcnt;
|
|
u16 ss_lcnt;
|
|
u16 fs_lcnt;
|
|
u32 sda_hold;
|
|
};
|
|
|
|
struct dw_pci_controller {
|
|
u32 bus_num;
|
|
u32 flags;
|
|
struct dw_scl_sda_cfg *scl_sda_cfg;
|
|
int (*setup)(struct pci_dev *pdev, struct dw_pci_controller *c);
|
|
u32 (*get_clk_rate_khz)(struct dw_i2c_dev *dev);
|
|
};
|
|
|
|
/* Merrifield HCNT/LCNT/SDA hold time */
|
|
static struct dw_scl_sda_cfg mrfld_config = {
|
|
.ss_hcnt = 0x2f8,
|
|
.fs_hcnt = 0x87,
|
|
.ss_lcnt = 0x37b,
|
|
.fs_lcnt = 0x10a,
|
|
};
|
|
|
|
/* BayTrail HCNT/LCNT/SDA hold time */
|
|
static struct dw_scl_sda_cfg byt_config = {
|
|
.ss_hcnt = 0x200,
|
|
.fs_hcnt = 0x55,
|
|
.ss_lcnt = 0x200,
|
|
.fs_lcnt = 0x99,
|
|
.sda_hold = 0x6,
|
|
};
|
|
|
|
/* Haswell HCNT/LCNT/SDA hold time */
|
|
static struct dw_scl_sda_cfg hsw_config = {
|
|
.ss_hcnt = 0x01b0,
|
|
.fs_hcnt = 0x48,
|
|
.ss_lcnt = 0x01fb,
|
|
.fs_lcnt = 0xa0,
|
|
.sda_hold = 0x9,
|
|
};
|
|
|
|
/* NAVI-AMD HCNT/LCNT/SDA hold time */
|
|
static struct dw_scl_sda_cfg navi_amd_config = {
|
|
.ss_hcnt = 0x1ae,
|
|
.ss_lcnt = 0x23a,
|
|
.sda_hold = 0x9,
|
|
};
|
|
|
|
static u32 mfld_get_clk_rate_khz(struct dw_i2c_dev *dev)
|
|
{
|
|
return 25000;
|
|
}
|
|
|
|
static int mfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
|
|
{
|
|
struct dw_i2c_dev *dev = pci_get_drvdata(pdev);
|
|
|
|
switch (pdev->device) {
|
|
case 0x0817:
|
|
dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;
|
|
fallthrough;
|
|
case 0x0818:
|
|
case 0x0819:
|
|
c->bus_num = pdev->device - 0x817 + 3;
|
|
return 0;
|
|
case 0x082C:
|
|
case 0x082D:
|
|
case 0x082E:
|
|
c->bus_num = pdev->device - 0x82C + 0;
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int mrfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
|
|
{
|
|
/*
|
|
* On Intel Merrifield the user visible i2c buses are enumerated
|
|
* [1..7]. So, we add 1 to shift the default range. Besides that the
|
|
* first PCI slot provides 4 functions, that's why we have to add 0 to
|
|
* the first slot and 4 to the next one.
|
|
*/
|
|
switch (PCI_SLOT(pdev->devfn)) {
|
|
case 8:
|
|
c->bus_num = PCI_FUNC(pdev->devfn) + 0 + 1;
|
|
return 0;
|
|
case 9:
|
|
c->bus_num = PCI_FUNC(pdev->devfn) + 4 + 1;
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
static u32 ehl_get_clk_rate_khz(struct dw_i2c_dev *dev)
|
|
{
|
|
return 100000;
|
|
}
|
|
|
|
static u32 navi_amd_get_clk_rate_khz(struct dw_i2c_dev *dev)
|
|
{
|
|
return 100000;
|
|
}
|
|
|
|
static int navi_amd_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
|
|
{
|
|
struct dw_i2c_dev *dev = pci_get_drvdata(pdev);
|
|
|
|
dev->flags |= MODEL_AMD_NAVI_GPU | ACCESS_POLLING;
|
|
dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;
|
|
return 0;
|
|
}
|
|
|
|
static struct dw_pci_controller dw_pci_controllers[] = {
|
|
[medfield] = {
|
|
.bus_num = -1,
|
|
.setup = mfld_setup,
|
|
.get_clk_rate_khz = mfld_get_clk_rate_khz,
|
|
},
|
|
[merrifield] = {
|
|
.bus_num = -1,
|
|
.scl_sda_cfg = &mrfld_config,
|
|
.setup = mrfld_setup,
|
|
},
|
|
[baytrail] = {
|
|
.bus_num = -1,
|
|
.scl_sda_cfg = &byt_config,
|
|
},
|
|
[haswell] = {
|
|
.bus_num = -1,
|
|
.scl_sda_cfg = &hsw_config,
|
|
},
|
|
[cherrytrail] = {
|
|
.bus_num = -1,
|
|
.scl_sda_cfg = &byt_config,
|
|
},
|
|
[elkhartlake] = {
|
|
.bus_num = -1,
|
|
.get_clk_rate_khz = ehl_get_clk_rate_khz,
|
|
},
|
|
[navi_amd] = {
|
|
.bus_num = -1,
|
|
.scl_sda_cfg = &navi_amd_config,
|
|
.setup = navi_amd_setup,
|
|
.get_clk_rate_khz = navi_amd_get_clk_rate_khz,
|
|
},
|
|
};
|
|
|
|
static const struct property_entry dgpu_properties[] = {
|
|
/* USB-C doesn't power the system */
|
|
PROPERTY_ENTRY_U8("scope", POWER_SUPPLY_SCOPE_DEVICE),
|
|
{}
|
|
};
|
|
|
|
static const struct software_node dgpu_node = {
|
|
.properties = dgpu_properties,
|
|
};
|
|
|
|
static int i2c_dw_pci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
struct dw_i2c_dev *dev;
|
|
struct i2c_adapter *adap;
|
|
int r;
|
|
struct dw_pci_controller *controller;
|
|
struct dw_scl_sda_cfg *cfg;
|
|
|
|
if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers))
|
|
return dev_err_probe(&pdev->dev, -EINVAL,
|
|
"Invalid driver data %ld\n",
|
|
id->driver_data);
|
|
|
|
controller = &dw_pci_controllers[id->driver_data];
|
|
|
|
r = pcim_enable_device(pdev);
|
|
if (r)
|
|
return dev_err_probe(&pdev->dev, r,
|
|
"Failed to enable I2C PCI device\n");
|
|
|
|
pci_set_master(pdev);
|
|
|
|
r = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
|
|
if (r)
|
|
return dev_err_probe(&pdev->dev, r,
|
|
"I/O memory remapping failed\n");
|
|
|
|
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
r = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
dev->get_clk_rate_khz = controller->get_clk_rate_khz;
|
|
dev->base = pcim_iomap_table(pdev)[0];
|
|
dev->dev = &pdev->dev;
|
|
dev->irq = pci_irq_vector(pdev, 0);
|
|
dev->flags |= controller->flags;
|
|
|
|
pci_set_drvdata(pdev, dev);
|
|
|
|
if (controller->setup) {
|
|
r = controller->setup(pdev, controller);
|
|
if (r)
|
|
return r;
|
|
}
|
|
|
|
r = i2c_dw_fw_parse_and_configure(dev);
|
|
if (r)
|
|
return r;
|
|
|
|
i2c_dw_configure(dev);
|
|
|
|
if (controller->scl_sda_cfg) {
|
|
cfg = controller->scl_sda_cfg;
|
|
dev->ss_hcnt = cfg->ss_hcnt;
|
|
dev->fs_hcnt = cfg->fs_hcnt;
|
|
dev->ss_lcnt = cfg->ss_lcnt;
|
|
dev->fs_lcnt = cfg->fs_lcnt;
|
|
dev->sda_hold_time = cfg->sda_hold;
|
|
}
|
|
|
|
adap = &dev->adapter;
|
|
adap->owner = THIS_MODULE;
|
|
adap->class = 0;
|
|
adap->nr = controller->bus_num;
|
|
|
|
r = i2c_dw_probe(dev);
|
|
if (r)
|
|
return r;
|
|
|
|
if ((dev->flags & MODEL_MASK) == MODEL_AMD_NAVI_GPU) {
|
|
dev->slave = i2c_new_ccgx_ucsi(&dev->adapter, dev->irq, &dgpu_node);
|
|
if (IS_ERR(dev->slave))
|
|
return dev_err_probe(dev->dev, PTR_ERR(dev->slave),
|
|
"register UCSI failed\n");
|
|
}
|
|
|
|
pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
|
|
pm_runtime_use_autosuspend(&pdev->dev);
|
|
pm_runtime_put_autosuspend(&pdev->dev);
|
|
pm_runtime_allow(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void i2c_dw_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct dw_i2c_dev *dev = pci_get_drvdata(pdev);
|
|
|
|
i2c_dw_disable(dev);
|
|
|
|
pm_runtime_forbid(&pdev->dev);
|
|
pm_runtime_get_noresume(&pdev->dev);
|
|
|
|
i2c_del_adapter(&dev->adapter);
|
|
}
|
|
|
|
static const struct pci_device_id i2c_designware_pci_ids[] = {
|
|
/* Medfield */
|
|
{ PCI_VDEVICE(INTEL, 0x0817), medfield },
|
|
{ PCI_VDEVICE(INTEL, 0x0818), medfield },
|
|
{ PCI_VDEVICE(INTEL, 0x0819), medfield },
|
|
{ PCI_VDEVICE(INTEL, 0x082C), medfield },
|
|
{ PCI_VDEVICE(INTEL, 0x082D), medfield },
|
|
{ PCI_VDEVICE(INTEL, 0x082E), medfield },
|
|
/* Merrifield */
|
|
{ PCI_VDEVICE(INTEL, 0x1195), merrifield },
|
|
{ PCI_VDEVICE(INTEL, 0x1196), merrifield },
|
|
/* Baytrail */
|
|
{ PCI_VDEVICE(INTEL, 0x0F41), baytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x0F42), baytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x0F43), baytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x0F44), baytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x0F45), baytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x0F46), baytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x0F47), baytrail },
|
|
/* Haswell */
|
|
{ PCI_VDEVICE(INTEL, 0x9c61), haswell },
|
|
{ PCI_VDEVICE(INTEL, 0x9c62), haswell },
|
|
/* Braswell / Cherrytrail */
|
|
{ PCI_VDEVICE(INTEL, 0x22C1), cherrytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x22C2), cherrytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x22C3), cherrytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x22C4), cherrytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x22C5), cherrytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x22C6), cherrytrail },
|
|
{ PCI_VDEVICE(INTEL, 0x22C7), cherrytrail },
|
|
/* Elkhart Lake (PSE I2C) */
|
|
{ PCI_VDEVICE(INTEL, 0x4bb9), elkhartlake },
|
|
{ PCI_VDEVICE(INTEL, 0x4bba), elkhartlake },
|
|
{ PCI_VDEVICE(INTEL, 0x4bbb), elkhartlake },
|
|
{ PCI_VDEVICE(INTEL, 0x4bbc), elkhartlake },
|
|
{ PCI_VDEVICE(INTEL, 0x4bbd), elkhartlake },
|
|
{ PCI_VDEVICE(INTEL, 0x4bbe), elkhartlake },
|
|
{ PCI_VDEVICE(INTEL, 0x4bbf), elkhartlake },
|
|
{ PCI_VDEVICE(INTEL, 0x4bc0), elkhartlake },
|
|
/* AMD NAVI */
|
|
{ PCI_VDEVICE(ATI, 0x7314), navi_amd },
|
|
{ PCI_VDEVICE(ATI, 0x73a4), navi_amd },
|
|
{ PCI_VDEVICE(ATI, 0x73e4), navi_amd },
|
|
{ PCI_VDEVICE(ATI, 0x73c4), navi_amd },
|
|
{ PCI_VDEVICE(ATI, 0x7444), navi_amd },
|
|
{ PCI_VDEVICE(ATI, 0x7464), navi_amd },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, i2c_designware_pci_ids);
|
|
|
|
static struct pci_driver dw_i2c_driver = {
|
|
.name = DRIVER_NAME,
|
|
.probe = i2c_dw_pci_probe,
|
|
.remove = i2c_dw_pci_remove,
|
|
.driver = {
|
|
.pm = pm_ptr(&i2c_dw_dev_pm_ops),
|
|
},
|
|
.id_table = i2c_designware_pci_ids,
|
|
};
|
|
module_pci_driver(dw_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
|
|
MODULE_DESCRIPTION("Synopsys DesignWare PCI I2C bus adapter");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_IMPORT_NS(I2C_DW);
|
|
MODULE_IMPORT_NS(I2C_DW_COMMON);
|